diff options
Diffstat (limited to 'netwerk/sctp/src/netinet/sctputil.c')
| -rw-r--r-- | netwerk/sctp/src/netinet/sctputil.c | 8718 |
1 files changed, 8718 insertions, 0 deletions
diff --git a/netwerk/sctp/src/netinet/sctputil.c b/netwerk/sctp/src/netinet/sctputil.c new file mode 100644 index 0000000000..7c9e2edfe5 --- /dev/null +++ b/netwerk/sctp/src/netinet/sctputil.c @@ -0,0 +1,8718 @@ +/*- + * SPDX-License-Identifier: BSD-3-Clause + * + * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved. + * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. + * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * a) Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * + * b) Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the distribution. + * + * c) Neither the name of Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, + * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF + * THE POSSIBILITY OF SUCH DAMAGE. + */ + +#if defined(__FreeBSD__) && !defined(__Userspace__) +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); +#endif + +#include <netinet/sctp_os.h> +#include <netinet/sctp_pcb.h> +#include <netinet/sctputil.h> +#include <netinet/sctp_var.h> +#include <netinet/sctp_sysctl.h> +#ifdef INET6 +#if defined(__Userspace__) || defined(__FreeBSD__) +#include <netinet6/sctp6_var.h> +#endif +#endif +#include <netinet/sctp_header.h> +#include <netinet/sctp_output.h> +#include <netinet/sctp_uio.h> +#include <netinet/sctp_timer.h> +#include <netinet/sctp_indata.h> +#include <netinet/sctp_auth.h> +#include <netinet/sctp_asconf.h> +#include <netinet/sctp_bsd_addr.h> +#if defined(__Userspace__) +#include <netinet/sctp_constants.h> +#endif +#if defined(__FreeBSD__) && !defined(__Userspace__) +#include <netinet/sctp_kdtrace.h> +#if defined(INET6) || defined(INET) +#include <netinet/tcp_var.h> +#endif +#include <netinet/udp.h> +#include <netinet/udp_var.h> +#include <sys/proc.h> +#ifdef INET6 +#include <netinet/icmp6.h> +#endif +#endif + +#if defined(_WIN32) && !defined(__Userspace__) +#if !defined(SCTP_LOCAL_TRACE_BUF) +#include "eventrace_netinet.h" +#include "sctputil.tmh" /* this is the file that will be auto generated */ +#endif +#else +#ifndef KTR_SCTP +#define KTR_SCTP KTR_SUBSYS +#endif +#endif + +extern const struct sctp_cc_functions sctp_cc_functions[]; +extern const struct sctp_ss_functions sctp_ss_functions[]; + +void +sctp_sblog(struct sockbuf *sb, struct sctp_tcb *stcb, int from, int incr) +{ +#if defined(SCTP_LOCAL_TRACE_BUF) + struct sctp_cwnd_log sctp_clog; + + sctp_clog.x.sb.stcb = stcb; + sctp_clog.x.sb.so_sbcc = SCTP_SBAVAIL(sb); + if (stcb) + sctp_clog.x.sb.stcb_sbcc = stcb->asoc.sb_cc; + else + sctp_clog.x.sb.stcb_sbcc = 0; + sctp_clog.x.sb.incr = incr; + SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x", + SCTP_LOG_EVENT_SB, + from, + sctp_clog.x.misc.log1, + sctp_clog.x.misc.log2, + sctp_clog.x.misc.log3, + sctp_clog.x.misc.log4); +#endif +} + +void +sctp_log_closing(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int16_t loc) +{ +#if defined(SCTP_LOCAL_TRACE_BUF) + struct sctp_cwnd_log sctp_clog; + + sctp_clog.x.close.inp = (void *)inp; + sctp_clog.x.close.sctp_flags = inp->sctp_flags; + if (stcb) { + sctp_clog.x.close.stcb = (void *)stcb; + sctp_clog.x.close.state = (uint16_t)stcb->asoc.state; + } else { + sctp_clog.x.close.stcb = 0; + sctp_clog.x.close.state = 0; + } + sctp_clog.x.close.loc = loc; + SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x", + SCTP_LOG_EVENT_CLOSE, + 0, + sctp_clog.x.misc.log1, + sctp_clog.x.misc.log2, + sctp_clog.x.misc.log3, + sctp_clog.x.misc.log4); +#endif +} + +void +rto_logging(struct sctp_nets *net, int from) +{ +#if defined(SCTP_LOCAL_TRACE_BUF) + struct sctp_cwnd_log sctp_clog; + + memset(&sctp_clog, 0, sizeof(sctp_clog)); + sctp_clog.x.rto.net = (void *) net; + sctp_clog.x.rto.rtt = net->rtt / 1000; + SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x", + SCTP_LOG_EVENT_RTT, + from, + sctp_clog.x.misc.log1, + sctp_clog.x.misc.log2, + sctp_clog.x.misc.log3, + sctp_clog.x.misc.log4); +#endif +} + +void +sctp_log_strm_del_alt(struct sctp_tcb *stcb, uint32_t tsn, uint16_t sseq, uint16_t stream, int from) +{ +#if defined(SCTP_LOCAL_TRACE_BUF) + struct sctp_cwnd_log sctp_clog; + + sctp_clog.x.strlog.stcb = stcb; + sctp_clog.x.strlog.n_tsn = tsn; + sctp_clog.x.strlog.n_sseq = sseq; + sctp_clog.x.strlog.e_tsn = 0; + sctp_clog.x.strlog.e_sseq = 0; + sctp_clog.x.strlog.strm = stream; + SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x", + SCTP_LOG_EVENT_STRM, + from, + sctp_clog.x.misc.log1, + sctp_clog.x.misc.log2, + sctp_clog.x.misc.log3, + sctp_clog.x.misc.log4); +#endif +} + +void +sctp_log_nagle_event(struct sctp_tcb *stcb, int action) +{ +#if defined(SCTP_LOCAL_TRACE_BUF) + struct sctp_cwnd_log sctp_clog; + + sctp_clog.x.nagle.stcb = (void *)stcb; + sctp_clog.x.nagle.total_flight = stcb->asoc.total_flight; + sctp_clog.x.nagle.total_in_queue = stcb->asoc.total_output_queue_size; + sctp_clog.x.nagle.count_in_queue = stcb->asoc.chunks_on_out_queue; + sctp_clog.x.nagle.count_in_flight = stcb->asoc.total_flight_count; + SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x", + SCTP_LOG_EVENT_NAGLE, + action, + sctp_clog.x.misc.log1, + sctp_clog.x.misc.log2, + sctp_clog.x.misc.log3, + sctp_clog.x.misc.log4); +#endif +} + +void +sctp_log_sack(uint32_t old_cumack, uint32_t cumack, uint32_t tsn, uint16_t gaps, uint16_t dups, int from) +{ +#if defined(SCTP_LOCAL_TRACE_BUF) + struct sctp_cwnd_log sctp_clog; + + sctp_clog.x.sack.cumack = cumack; + sctp_clog.x.sack.oldcumack = old_cumack; + sctp_clog.x.sack.tsn = tsn; + sctp_clog.x.sack.numGaps = gaps; + sctp_clog.x.sack.numDups = dups; + SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x", + SCTP_LOG_EVENT_SACK, + from, + sctp_clog.x.misc.log1, + sctp_clog.x.misc.log2, + sctp_clog.x.misc.log3, + sctp_clog.x.misc.log4); +#endif +} + +void +sctp_log_map(uint32_t map, uint32_t cum, uint32_t high, int from) +{ +#if defined(SCTP_LOCAL_TRACE_BUF) + struct sctp_cwnd_log sctp_clog; + + memset(&sctp_clog, 0, sizeof(sctp_clog)); + sctp_clog.x.map.base = map; + sctp_clog.x.map.cum = cum; + sctp_clog.x.map.high = high; + SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x", + SCTP_LOG_EVENT_MAP, + from, + sctp_clog.x.misc.log1, + sctp_clog.x.misc.log2, + sctp_clog.x.misc.log3, + sctp_clog.x.misc.log4); +#endif +} + +void +sctp_log_fr(uint32_t biggest_tsn, uint32_t biggest_new_tsn, uint32_t tsn, int from) +{ +#if defined(SCTP_LOCAL_TRACE_BUF) + struct sctp_cwnd_log sctp_clog; + + memset(&sctp_clog, 0, sizeof(sctp_clog)); + sctp_clog.x.fr.largest_tsn = biggest_tsn; + sctp_clog.x.fr.largest_new_tsn = biggest_new_tsn; + sctp_clog.x.fr.tsn = tsn; + SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x", + SCTP_LOG_EVENT_FR, + from, + sctp_clog.x.misc.log1, + sctp_clog.x.misc.log2, + sctp_clog.x.misc.log3, + sctp_clog.x.misc.log4); +#endif +} + +#ifdef SCTP_MBUF_LOGGING +void +sctp_log_mb(struct mbuf *m, int from) +{ +#if defined(SCTP_LOCAL_TRACE_BUF) + struct sctp_cwnd_log sctp_clog; + + sctp_clog.x.mb.mp = m; + sctp_clog.x.mb.mbuf_flags = (uint8_t)(SCTP_BUF_GET_FLAGS(m)); + sctp_clog.x.mb.size = (uint16_t)(SCTP_BUF_LEN(m)); + sctp_clog.x.mb.data = SCTP_BUF_AT(m, 0); + if (SCTP_BUF_IS_EXTENDED(m)) { + sctp_clog.x.mb.ext = SCTP_BUF_EXTEND_BASE(m); +#if defined(__APPLE__) && !defined(__Userspace__) + /* APPLE does not use a ref_cnt, but a forward/backward ref queue */ +#else + sctp_clog.x.mb.refcnt = (uint8_t)(SCTP_BUF_EXTEND_REFCNT(m)); +#endif + } else { + sctp_clog.x.mb.ext = 0; + sctp_clog.x.mb.refcnt = 0; + } + SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x", + SCTP_LOG_EVENT_MBUF, + from, + sctp_clog.x.misc.log1, + sctp_clog.x.misc.log2, + sctp_clog.x.misc.log3, + sctp_clog.x.misc.log4); +#endif +} + +void +sctp_log_mbc(struct mbuf *m, int from) +{ + struct mbuf *mat; + + for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) { + sctp_log_mb(mat, from); + } +} +#endif + +void +sctp_log_strm_del(struct sctp_queued_to_read *control, struct sctp_queued_to_read *poschk, int from) +{ +#if defined(SCTP_LOCAL_TRACE_BUF) + struct sctp_cwnd_log sctp_clog; + + if (control == NULL) { + SCTP_PRINTF("Gak log of NULL?\n"); + return; + } + sctp_clog.x.strlog.stcb = control->stcb; + sctp_clog.x.strlog.n_tsn = control->sinfo_tsn; + sctp_clog.x.strlog.n_sseq = (uint16_t)control->mid; + sctp_clog.x.strlog.strm = control->sinfo_stream; + if (poschk != NULL) { + sctp_clog.x.strlog.e_tsn = poschk->sinfo_tsn; + sctp_clog.x.strlog.e_sseq = (uint16_t)poschk->mid; + } else { + sctp_clog.x.strlog.e_tsn = 0; + sctp_clog.x.strlog.e_sseq = 0; + } + SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x", + SCTP_LOG_EVENT_STRM, + from, + sctp_clog.x.misc.log1, + sctp_clog.x.misc.log2, + sctp_clog.x.misc.log3, + sctp_clog.x.misc.log4); +#endif +} + +void +sctp_log_cwnd(struct sctp_tcb *stcb, struct sctp_nets *net, int augment, uint8_t from) +{ +#if defined(SCTP_LOCAL_TRACE_BUF) + struct sctp_cwnd_log sctp_clog; + + sctp_clog.x.cwnd.net = net; + if (stcb->asoc.send_queue_cnt > 255) + sctp_clog.x.cwnd.cnt_in_send = 255; + else + sctp_clog.x.cwnd.cnt_in_send = stcb->asoc.send_queue_cnt; + if (stcb->asoc.stream_queue_cnt > 255) + sctp_clog.x.cwnd.cnt_in_str = 255; + else + sctp_clog.x.cwnd.cnt_in_str = stcb->asoc.stream_queue_cnt; + + if (net) { + sctp_clog.x.cwnd.cwnd_new_value = net->cwnd; + sctp_clog.x.cwnd.inflight = net->flight_size; + sctp_clog.x.cwnd.pseudo_cumack = net->pseudo_cumack; + sctp_clog.x.cwnd.meets_pseudo_cumack = net->new_pseudo_cumack; + sctp_clog.x.cwnd.need_new_pseudo_cumack = net->find_pseudo_cumack; + } + if (SCTP_CWNDLOG_PRESEND == from) { + sctp_clog.x.cwnd.meets_pseudo_cumack = stcb->asoc.peers_rwnd; + } + sctp_clog.x.cwnd.cwnd_augment = augment; + SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x", + SCTP_LOG_EVENT_CWND, + from, + sctp_clog.x.misc.log1, + sctp_clog.x.misc.log2, + sctp_clog.x.misc.log3, + sctp_clog.x.misc.log4); +#endif +} + +#if !defined(__APPLE__) && !defined(__Userspace__) +void +sctp_log_lock(struct sctp_inpcb *inp, struct sctp_tcb *stcb, uint8_t from) +{ +#if defined(SCTP_LOCAL_TRACE_BUF) + struct sctp_cwnd_log sctp_clog; + + memset(&sctp_clog, 0, sizeof(sctp_clog)); + if (inp) { + sctp_clog.x.lock.sock = (void *) inp->sctp_socket; + + } else { + sctp_clog.x.lock.sock = (void *) NULL; + } + sctp_clog.x.lock.inp = (void *) inp; +#if defined(__FreeBSD__) + if (stcb) { + sctp_clog.x.lock.tcb_lock = mtx_owned(&stcb->tcb_mtx); + } else { + sctp_clog.x.lock.tcb_lock = SCTP_LOCK_UNKNOWN; + } + if (inp) { + sctp_clog.x.lock.inp_lock = mtx_owned(&inp->inp_mtx); + sctp_clog.x.lock.create_lock = mtx_owned(&inp->inp_create_mtx); + } else { + sctp_clog.x.lock.inp_lock = SCTP_LOCK_UNKNOWN; + sctp_clog.x.lock.create_lock = SCTP_LOCK_UNKNOWN; + } + sctp_clog.x.lock.info_lock = rw_wowned(&SCTP_BASE_INFO(ipi_ep_mtx)); + if (inp && (inp->sctp_socket)) { + sctp_clog.x.lock.sock_lock = mtx_owned(SOCK_MTX(inp->sctp_socket)); + sctp_clog.x.lock.sockrcvbuf_lock = mtx_owned(SOCKBUF_MTX(&inp->sctp_socket->so_rcv)); + sctp_clog.x.lock.socksndbuf_lock = mtx_owned(SOCKBUF_MTX(&inp->sctp_socket->so_snd)); + } else { + sctp_clog.x.lock.sock_lock = SCTP_LOCK_UNKNOWN; + sctp_clog.x.lock.sockrcvbuf_lock = SCTP_LOCK_UNKNOWN; + sctp_clog.x.lock.socksndbuf_lock = SCTP_LOCK_UNKNOWN; + } +#endif + SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x", + SCTP_LOG_LOCK_EVENT, + from, + sctp_clog.x.misc.log1, + sctp_clog.x.misc.log2, + sctp_clog.x.misc.log3, + sctp_clog.x.misc.log4); +#endif +} +#endif + +void +sctp_log_maxburst(struct sctp_tcb *stcb, struct sctp_nets *net, int error, int burst, uint8_t from) +{ +#if defined(SCTP_LOCAL_TRACE_BUF) + struct sctp_cwnd_log sctp_clog; + + memset(&sctp_clog, 0, sizeof(sctp_clog)); + sctp_clog.x.cwnd.net = net; + sctp_clog.x.cwnd.cwnd_new_value = error; + sctp_clog.x.cwnd.inflight = net->flight_size; + sctp_clog.x.cwnd.cwnd_augment = burst; + if (stcb->asoc.send_queue_cnt > 255) + sctp_clog.x.cwnd.cnt_in_send = 255; + else + sctp_clog.x.cwnd.cnt_in_send = stcb->asoc.send_queue_cnt; + if (stcb->asoc.stream_queue_cnt > 255) + sctp_clog.x.cwnd.cnt_in_str = 255; + else + sctp_clog.x.cwnd.cnt_in_str = stcb->asoc.stream_queue_cnt; + SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x", + SCTP_LOG_EVENT_MAXBURST, + from, + sctp_clog.x.misc.log1, + sctp_clog.x.misc.log2, + sctp_clog.x.misc.log3, + sctp_clog.x.misc.log4); +#endif +} + +void +sctp_log_rwnd(uint8_t from, uint32_t peers_rwnd, uint32_t snd_size, uint32_t overhead) +{ +#if defined(SCTP_LOCAL_TRACE_BUF) + struct sctp_cwnd_log sctp_clog; + + sctp_clog.x.rwnd.rwnd = peers_rwnd; + sctp_clog.x.rwnd.send_size = snd_size; + sctp_clog.x.rwnd.overhead = overhead; + sctp_clog.x.rwnd.new_rwnd = 0; + SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x", + SCTP_LOG_EVENT_RWND, + from, + sctp_clog.x.misc.log1, + sctp_clog.x.misc.log2, + sctp_clog.x.misc.log3, + sctp_clog.x.misc.log4); +#endif +} + +void +sctp_log_rwnd_set(uint8_t from, uint32_t peers_rwnd, uint32_t flight_size, uint32_t overhead, uint32_t a_rwndval) +{ +#if defined(SCTP_LOCAL_TRACE_BUF) + struct sctp_cwnd_log sctp_clog; + + sctp_clog.x.rwnd.rwnd = peers_rwnd; + sctp_clog.x.rwnd.send_size = flight_size; + sctp_clog.x.rwnd.overhead = overhead; + sctp_clog.x.rwnd.new_rwnd = a_rwndval; + SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x", + SCTP_LOG_EVENT_RWND, + from, + sctp_clog.x.misc.log1, + sctp_clog.x.misc.log2, + sctp_clog.x.misc.log3, + sctp_clog.x.misc.log4); +#endif +} + +#ifdef SCTP_MBCNT_LOGGING +static void +sctp_log_mbcnt(uint8_t from, uint32_t total_oq, uint32_t book, uint32_t total_mbcnt_q, uint32_t mbcnt) +{ +#if defined(SCTP_LOCAL_TRACE_BUF) + struct sctp_cwnd_log sctp_clog; + + sctp_clog.x.mbcnt.total_queue_size = total_oq; + sctp_clog.x.mbcnt.size_change = book; + sctp_clog.x.mbcnt.total_queue_mb_size = total_mbcnt_q; + sctp_clog.x.mbcnt.mbcnt_change = mbcnt; + SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x", + SCTP_LOG_EVENT_MBCNT, + from, + sctp_clog.x.misc.log1, + sctp_clog.x.misc.log2, + sctp_clog.x.misc.log3, + sctp_clog.x.misc.log4); +#endif +} +#endif + +void +sctp_misc_ints(uint8_t from, uint32_t a, uint32_t b, uint32_t c, uint32_t d) +{ +#if defined(SCTP_LOCAL_TRACE_BUF) + SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x", + SCTP_LOG_MISC_EVENT, + from, + a, b, c, d); +#endif +} + +void +sctp_wakeup_log(struct sctp_tcb *stcb, uint32_t wake_cnt, int from) +{ +#if defined(SCTP_LOCAL_TRACE_BUF) + struct sctp_cwnd_log sctp_clog; + + sctp_clog.x.wake.stcb = (void *)stcb; + sctp_clog.x.wake.wake_cnt = wake_cnt; + sctp_clog.x.wake.flight = stcb->asoc.total_flight_count; + sctp_clog.x.wake.send_q = stcb->asoc.send_queue_cnt; + sctp_clog.x.wake.sent_q = stcb->asoc.sent_queue_cnt; + + if (stcb->asoc.stream_queue_cnt < 0xff) + sctp_clog.x.wake.stream_qcnt = (uint8_t) stcb->asoc.stream_queue_cnt; + else + sctp_clog.x.wake.stream_qcnt = 0xff; + + if (stcb->asoc.chunks_on_out_queue < 0xff) + sctp_clog.x.wake.chunks_on_oque = (uint8_t) stcb->asoc.chunks_on_out_queue; + else + sctp_clog.x.wake.chunks_on_oque = 0xff; + + sctp_clog.x.wake.sctpflags = 0; + /* set in the defered mode stuff */ + if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_DONT_WAKE) + sctp_clog.x.wake.sctpflags |= 1; + if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_WAKEOUTPUT) + sctp_clog.x.wake.sctpflags |= 2; + if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_WAKEINPUT) + sctp_clog.x.wake.sctpflags |= 4; + /* what about the sb */ + if (stcb->sctp_socket) { + struct socket *so = stcb->sctp_socket; + + sctp_clog.x.wake.sbflags = (uint8_t)((so->so_snd.sb_flags & 0x00ff)); + } else { + sctp_clog.x.wake.sbflags = 0xff; + } + SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x", + SCTP_LOG_EVENT_WAKE, + from, + sctp_clog.x.misc.log1, + sctp_clog.x.misc.log2, + sctp_clog.x.misc.log3, + sctp_clog.x.misc.log4); +#endif +} + +void +sctp_log_block(uint8_t from, struct sctp_association *asoc, ssize_t sendlen) +{ +#if defined(SCTP_LOCAL_TRACE_BUF) + struct sctp_cwnd_log sctp_clog; + + sctp_clog.x.blk.onsb = asoc->total_output_queue_size; + sctp_clog.x.blk.send_sent_qcnt = (uint16_t) (asoc->send_queue_cnt + asoc->sent_queue_cnt); + sctp_clog.x.blk.peer_rwnd = asoc->peers_rwnd; + sctp_clog.x.blk.stream_qcnt = (uint16_t) asoc->stream_queue_cnt; + sctp_clog.x.blk.chunks_on_oque = (uint16_t) asoc->chunks_on_out_queue; + sctp_clog.x.blk.flight_size = (uint16_t) (asoc->total_flight/1024); + sctp_clog.x.blk.sndlen = (uint32_t)sendlen; + SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x", + SCTP_LOG_EVENT_BLOCK, + from, + sctp_clog.x.misc.log1, + sctp_clog.x.misc.log2, + sctp_clog.x.misc.log3, + sctp_clog.x.misc.log4); +#endif +} + +int +sctp_fill_stat_log(void *optval SCTP_UNUSED, size_t *optsize SCTP_UNUSED) +{ + /* May need to fix this if ktrdump does not work */ + return (0); +} + +#ifdef SCTP_AUDITING_ENABLED +uint8_t sctp_audit_data[SCTP_AUDIT_SIZE][2]; +static int sctp_audit_indx = 0; + +static +void +sctp_print_audit_report(void) +{ + int i; + int cnt; + + cnt = 0; + for (i = sctp_audit_indx; i < SCTP_AUDIT_SIZE; i++) { + if ((sctp_audit_data[i][0] == 0xe0) && + (sctp_audit_data[i][1] == 0x01)) { + cnt = 0; + SCTP_PRINTF("\n"); + } else if (sctp_audit_data[i][0] == 0xf0) { + cnt = 0; + SCTP_PRINTF("\n"); + } else if ((sctp_audit_data[i][0] == 0xc0) && + (sctp_audit_data[i][1] == 0x01)) { + SCTP_PRINTF("\n"); + cnt = 0; + } + SCTP_PRINTF("%2.2x%2.2x ", (uint32_t) sctp_audit_data[i][0], + (uint32_t) sctp_audit_data[i][1]); + cnt++; + if ((cnt % 14) == 0) + SCTP_PRINTF("\n"); + } + for (i = 0; i < sctp_audit_indx; i++) { + if ((sctp_audit_data[i][0] == 0xe0) && + (sctp_audit_data[i][1] == 0x01)) { + cnt = 0; + SCTP_PRINTF("\n"); + } else if (sctp_audit_data[i][0] == 0xf0) { + cnt = 0; + SCTP_PRINTF("\n"); + } else if ((sctp_audit_data[i][0] == 0xc0) && + (sctp_audit_data[i][1] == 0x01)) { + SCTP_PRINTF("\n"); + cnt = 0; + } + SCTP_PRINTF("%2.2x%2.2x ", (uint32_t) sctp_audit_data[i][0], + (uint32_t) sctp_audit_data[i][1]); + cnt++; + if ((cnt % 14) == 0) + SCTP_PRINTF("\n"); + } + SCTP_PRINTF("\n"); +} + +void +sctp_auditing(int from, struct sctp_inpcb *inp, struct sctp_tcb *stcb, + struct sctp_nets *net) +{ + int resend_cnt, tot_out, rep, tot_book_cnt; + struct sctp_nets *lnet; + struct sctp_tmit_chunk *chk; + + sctp_audit_data[sctp_audit_indx][0] = 0xAA; + sctp_audit_data[sctp_audit_indx][1] = 0x000000ff & from; + sctp_audit_indx++; + if (sctp_audit_indx >= SCTP_AUDIT_SIZE) { + sctp_audit_indx = 0; + } + if (inp == NULL) { + sctp_audit_data[sctp_audit_indx][0] = 0xAF; + sctp_audit_data[sctp_audit_indx][1] = 0x01; + sctp_audit_indx++; + if (sctp_audit_indx >= SCTP_AUDIT_SIZE) { + sctp_audit_indx = 0; + } + return; + } + if (stcb == NULL) { + sctp_audit_data[sctp_audit_indx][0] = 0xAF; + sctp_audit_data[sctp_audit_indx][1] = 0x02; + sctp_audit_indx++; + if (sctp_audit_indx >= SCTP_AUDIT_SIZE) { + sctp_audit_indx = 0; + } + return; + } + sctp_audit_data[sctp_audit_indx][0] = 0xA1; + sctp_audit_data[sctp_audit_indx][1] = + (0x000000ff & stcb->asoc.sent_queue_retran_cnt); + sctp_audit_indx++; + if (sctp_audit_indx >= SCTP_AUDIT_SIZE) { + sctp_audit_indx = 0; + } + rep = 0; + tot_book_cnt = 0; + resend_cnt = tot_out = 0; + TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { + if (chk->sent == SCTP_DATAGRAM_RESEND) { + resend_cnt++; + } else if (chk->sent < SCTP_DATAGRAM_RESEND) { + tot_out += chk->book_size; + tot_book_cnt++; + } + } + if (resend_cnt != stcb->asoc.sent_queue_retran_cnt) { + sctp_audit_data[sctp_audit_indx][0] = 0xAF; + sctp_audit_data[sctp_audit_indx][1] = 0xA1; + sctp_audit_indx++; + if (sctp_audit_indx >= SCTP_AUDIT_SIZE) { + sctp_audit_indx = 0; + } + SCTP_PRINTF("resend_cnt:%d asoc-tot:%d\n", + resend_cnt, stcb->asoc.sent_queue_retran_cnt); + rep = 1; + stcb->asoc.sent_queue_retran_cnt = resend_cnt; + sctp_audit_data[sctp_audit_indx][0] = 0xA2; + sctp_audit_data[sctp_audit_indx][1] = + (0x000000ff & stcb->asoc.sent_queue_retran_cnt); + sctp_audit_indx++; + if (sctp_audit_indx >= SCTP_AUDIT_SIZE) { + sctp_audit_indx = 0; + } + } + if (tot_out != stcb->asoc.total_flight) { + sctp_audit_data[sctp_audit_indx][0] = 0xAF; + sctp_audit_data[sctp_audit_indx][1] = 0xA2; + sctp_audit_indx++; + if (sctp_audit_indx >= SCTP_AUDIT_SIZE) { + sctp_audit_indx = 0; + } + rep = 1; + SCTP_PRINTF("tot_flt:%d asoc_tot:%d\n", tot_out, + (int)stcb->asoc.total_flight); + stcb->asoc.total_flight = tot_out; + } + if (tot_book_cnt != stcb->asoc.total_flight_count) { + sctp_audit_data[sctp_audit_indx][0] = 0xAF; + sctp_audit_data[sctp_audit_indx][1] = 0xA5; + sctp_audit_indx++; + if (sctp_audit_indx >= SCTP_AUDIT_SIZE) { + sctp_audit_indx = 0; + } + rep = 1; + SCTP_PRINTF("tot_flt_book:%d\n", tot_book_cnt); + + stcb->asoc.total_flight_count = tot_book_cnt; + } + tot_out = 0; + TAILQ_FOREACH(lnet, &stcb->asoc.nets, sctp_next) { + tot_out += lnet->flight_size; + } + if (tot_out != stcb->asoc.total_flight) { + sctp_audit_data[sctp_audit_indx][0] = 0xAF; + sctp_audit_data[sctp_audit_indx][1] = 0xA3; + sctp_audit_indx++; + if (sctp_audit_indx >= SCTP_AUDIT_SIZE) { + sctp_audit_indx = 0; + } + rep = 1; + SCTP_PRINTF("real flight:%d net total was %d\n", + stcb->asoc.total_flight, tot_out); + /* now corrective action */ + TAILQ_FOREACH(lnet, &stcb->asoc.nets, sctp_next) { + tot_out = 0; + TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { + if ((chk->whoTo == lnet) && + (chk->sent < SCTP_DATAGRAM_RESEND)) { + tot_out += chk->book_size; + } + } + if (lnet->flight_size != tot_out) { + SCTP_PRINTF("net:%p flight was %d corrected to %d\n", + (void *)lnet, lnet->flight_size, + tot_out); + lnet->flight_size = tot_out; + } + } + } + if (rep) { + sctp_print_audit_report(); + } +} + +void +sctp_audit_log(uint8_t ev, uint8_t fd) +{ + + sctp_audit_data[sctp_audit_indx][0] = ev; + sctp_audit_data[sctp_audit_indx][1] = fd; + sctp_audit_indx++; + if (sctp_audit_indx >= SCTP_AUDIT_SIZE) { + sctp_audit_indx = 0; + } +} + +#endif + +/* + * The conversion from time to ticks and vice versa is done by rounding + * upwards. This way we can test in the code the time to be positive and + * know that this corresponds to a positive number of ticks. + */ + +uint32_t +sctp_msecs_to_ticks(uint32_t msecs) +{ + uint64_t temp; + uint32_t ticks; + + if (hz == 1000) { + ticks = msecs; + } else { + temp = (((uint64_t)msecs * hz) + 999) / 1000; + if (temp > UINT32_MAX) { + ticks = UINT32_MAX; + } else { + ticks = (uint32_t)temp; + } + } + return (ticks); +} + +uint32_t +sctp_ticks_to_msecs(uint32_t ticks) +{ + uint64_t temp; + uint32_t msecs; + + if (hz == 1000) { + msecs = ticks; + } else { + temp = (((uint64_t)ticks * 1000) + (hz - 1)) / hz; + if (temp > UINT32_MAX) { + msecs = UINT32_MAX; + } else { + msecs = (uint32_t)temp; + } + } + return (msecs); +} + +uint32_t +sctp_secs_to_ticks(uint32_t secs) +{ + uint64_t temp; + uint32_t ticks; + + temp = (uint64_t)secs * hz; + if (temp > UINT32_MAX) { + ticks = UINT32_MAX; + } else { + ticks = (uint32_t)temp; + } + return (ticks); +} + +uint32_t +sctp_ticks_to_secs(uint32_t ticks) +{ + uint64_t temp; + uint32_t secs; + + temp = ((uint64_t)ticks + (hz - 1)) / hz; + if (temp > UINT32_MAX) { + secs = UINT32_MAX; + } else { + secs = (uint32_t)temp; + } + return (secs); +} + +/* + * sctp_stop_timers_for_shutdown() should be called + * when entering the SHUTDOWN_SENT or SHUTDOWN_ACK_SENT + * state to make sure that all timers are stopped. + */ +void +sctp_stop_timers_for_shutdown(struct sctp_tcb *stcb) +{ + struct sctp_inpcb *inp; + struct sctp_nets *net; + + inp = stcb->sctp_ep; + + sctp_timer_stop(SCTP_TIMER_TYPE_RECV, inp, stcb, NULL, + SCTP_FROM_SCTPUTIL + SCTP_LOC_12); + sctp_timer_stop(SCTP_TIMER_TYPE_STRRESET, inp, stcb, NULL, + SCTP_FROM_SCTPUTIL + SCTP_LOC_13); + sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, inp, stcb, NULL, + SCTP_FROM_SCTPUTIL + SCTP_LOC_14); + sctp_timer_stop(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, NULL, + SCTP_FROM_SCTPUTIL + SCTP_LOC_15); + TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { + sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net, + SCTP_FROM_SCTPUTIL + SCTP_LOC_16); + sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net, + SCTP_FROM_SCTPUTIL + SCTP_LOC_17); + } +} + +void +sctp_stop_association_timers(struct sctp_tcb *stcb, bool stop_assoc_kill_timer) +{ + struct sctp_inpcb *inp; + struct sctp_nets *net; + + inp = stcb->sctp_ep; + sctp_timer_stop(SCTP_TIMER_TYPE_RECV, inp, stcb, NULL, + SCTP_FROM_SCTPUTIL + SCTP_LOC_18); + sctp_timer_stop(SCTP_TIMER_TYPE_STRRESET, inp, stcb, NULL, + SCTP_FROM_SCTPUTIL + SCTP_LOC_19); + if (stop_assoc_kill_timer) { + sctp_timer_stop(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL, + SCTP_FROM_SCTPUTIL + SCTP_LOC_20); + } + sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, inp, stcb, NULL, + SCTP_FROM_SCTPUTIL + SCTP_LOC_21); + sctp_timer_stop(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, NULL, + SCTP_FROM_SCTPUTIL + SCTP_LOC_22); + sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWNGUARD, inp, stcb, NULL, + SCTP_FROM_SCTPUTIL + SCTP_LOC_23); + /* Mobility adaptation */ + sctp_timer_stop(SCTP_TIMER_TYPE_PRIM_DELETED, inp, stcb, NULL, + SCTP_FROM_SCTPUTIL + SCTP_LOC_24); + TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { + sctp_timer_stop(SCTP_TIMER_TYPE_SEND, inp, stcb, net, + SCTP_FROM_SCTPUTIL + SCTP_LOC_25); + sctp_timer_stop(SCTP_TIMER_TYPE_INIT, inp, stcb, net, + SCTP_FROM_SCTPUTIL + SCTP_LOC_26); + sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, inp, stcb, net, + SCTP_FROM_SCTPUTIL + SCTP_LOC_27); + sctp_timer_stop(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net, + SCTP_FROM_SCTPUTIL + SCTP_LOC_28); + sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWNACK, inp, stcb, net, + SCTP_FROM_SCTPUTIL + SCTP_LOC_29); + sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net, + SCTP_FROM_SCTPUTIL + SCTP_LOC_30); + sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net, + SCTP_FROM_SCTPUTIL + SCTP_LOC_31); + } +} + +/* + * A list of sizes based on typical mtu's, used only if next hop size not + * returned. These values MUST be multiples of 4 and MUST be ordered. + */ +static uint32_t sctp_mtu_sizes[] = { + 68, + 296, + 508, + 512, + 544, + 576, + 1004, + 1492, + 1500, + 1536, + 2000, + 2048, + 4352, + 4464, + 8168, + 17912, + 32000, + 65532 +}; + +/* + * Return the largest MTU in sctp_mtu_sizes smaller than val. + * If val is smaller than the minimum, just return the largest + * multiple of 4 smaller or equal to val. + * Ensure that the result is a multiple of 4. + */ +uint32_t +sctp_get_prev_mtu(uint32_t val) +{ + uint32_t i; + + val &= 0xfffffffc; + if (val <= sctp_mtu_sizes[0]) { + return (val); + } + for (i = 1; i < (sizeof(sctp_mtu_sizes) / sizeof(uint32_t)); i++) { + if (val <= sctp_mtu_sizes[i]) { + break; + } + } + KASSERT((sctp_mtu_sizes[i - 1] & 0x00000003) == 0, + ("sctp_mtu_sizes[%u] not a multiple of 4", i - 1)); + return (sctp_mtu_sizes[i - 1]); +} + +/* + * Return the smallest MTU in sctp_mtu_sizes larger than val. + * If val is larger than the maximum, just return the largest multiple of 4 smaller + * or equal to val. + * Ensure that the result is a multiple of 4. + */ +uint32_t +sctp_get_next_mtu(uint32_t val) +{ + /* select another MTU that is just bigger than this one */ + uint32_t i; + + val &= 0xfffffffc; + for (i = 0; i < (sizeof(sctp_mtu_sizes) / sizeof(uint32_t)); i++) { + if (val < sctp_mtu_sizes[i]) { + KASSERT((sctp_mtu_sizes[i] & 0x00000003) == 0, + ("sctp_mtu_sizes[%u] not a multiple of 4", i)); + return (sctp_mtu_sizes[i]); + } + } + return (val); +} + +void +sctp_fill_random_store(struct sctp_pcb *m) +{ + /* + * Here we use the MD5/SHA-1 to hash with our good randomNumbers and + * our counter. The result becomes our good random numbers and we + * then setup to give these out. Note that we do no locking to + * protect this. This is ok, since if competing folks call this we + * will get more gobbled gook in the random store which is what we + * want. There is a danger that two guys will use the same random + * numbers, but thats ok too since that is random as well :-> + */ + m->store_at = 0; +#if defined(__Userspace__) && defined(FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION) + for (int i = 0; i < (int) (sizeof(m->random_store) / sizeof(m->random_store[0])); i++) { + m->random_store[i] = (uint8_t) rand(); + } +#else + (void)sctp_hmac(SCTP_HMAC, (uint8_t *)m->random_numbers, + sizeof(m->random_numbers), (uint8_t *)&m->random_counter, + sizeof(m->random_counter), (uint8_t *)m->random_store); +#endif + m->random_counter++; +} + +uint32_t +sctp_select_initial_TSN(struct sctp_pcb *inp) +{ + /* + * A true implementation should use random selection process to get + * the initial stream sequence number, using RFC1750 as a good + * guideline + */ + uint32_t x, *xp; + uint8_t *p; + int store_at, new_store; + + if (inp->initial_sequence_debug != 0) { + uint32_t ret; + + ret = inp->initial_sequence_debug; + inp->initial_sequence_debug++; + return (ret); + } + retry: + store_at = inp->store_at; + new_store = store_at + sizeof(uint32_t); + if (new_store >= (SCTP_SIGNATURE_SIZE-3)) { + new_store = 0; + } + if (!atomic_cmpset_int(&inp->store_at, store_at, new_store)) { + goto retry; + } + if (new_store == 0) { + /* Refill the random store */ + sctp_fill_random_store(inp); + } + p = &inp->random_store[store_at]; + xp = (uint32_t *)p; + x = *xp; + return (x); +} + +uint32_t +sctp_select_a_tag(struct sctp_inpcb *inp, uint16_t lport, uint16_t rport, int check) +{ + uint32_t x; + struct timeval now; + + if (check) { + (void)SCTP_GETTIME_TIMEVAL(&now); + } + for (;;) { + x = sctp_select_initial_TSN(&inp->sctp_ep); + if (x == 0) { + /* we never use 0 */ + continue; + } + if (!check || sctp_is_vtag_good(x, lport, rport, &now)) { + break; + } + } + return (x); +} + +int32_t +sctp_map_assoc_state(int kernel_state) +{ + int32_t user_state; + + if (kernel_state & SCTP_STATE_WAS_ABORTED) { + user_state = SCTP_CLOSED; + } else if (kernel_state & SCTP_STATE_SHUTDOWN_PENDING) { + user_state = SCTP_SHUTDOWN_PENDING; + } else { + switch (kernel_state & SCTP_STATE_MASK) { + case SCTP_STATE_EMPTY: + user_state = SCTP_CLOSED; + break; + case SCTP_STATE_INUSE: + user_state = SCTP_CLOSED; + break; + case SCTP_STATE_COOKIE_WAIT: + user_state = SCTP_COOKIE_WAIT; + break; + case SCTP_STATE_COOKIE_ECHOED: + user_state = SCTP_COOKIE_ECHOED; + break; + case SCTP_STATE_OPEN: + user_state = SCTP_ESTABLISHED; + break; + case SCTP_STATE_SHUTDOWN_SENT: + user_state = SCTP_SHUTDOWN_SENT; + break; + case SCTP_STATE_SHUTDOWN_RECEIVED: + user_state = SCTP_SHUTDOWN_RECEIVED; + break; + case SCTP_STATE_SHUTDOWN_ACK_SENT: + user_state = SCTP_SHUTDOWN_ACK_SENT; + break; + default: + user_state = SCTP_CLOSED; + break; + } + } + return (user_state); +} + +int +sctp_init_asoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, + uint32_t override_tag, uint32_t initial_tsn, uint32_t vrf_id, + uint16_t o_strms) +{ + struct sctp_association *asoc; + /* + * Anything set to zero is taken care of by the allocation routine's + * bzero + */ + + /* + * Up front select what scoping to apply on addresses I tell my peer + * Not sure what to do with these right now, we will need to come up + * with a way to set them. We may need to pass them through from the + * caller in the sctp_aloc_assoc() function. + */ + int i; +#if defined(SCTP_DETAILED_STR_STATS) + int j; +#endif + + asoc = &stcb->asoc; + /* init all variables to a known value. */ + SCTP_SET_STATE(stcb, SCTP_STATE_INUSE); + asoc->max_burst = inp->sctp_ep.max_burst; + asoc->fr_max_burst = inp->sctp_ep.fr_max_burst; + asoc->heart_beat_delay = sctp_ticks_to_msecs(inp->sctp_ep.sctp_timeoutticks[SCTP_TIMER_HEARTBEAT]); + asoc->cookie_life = inp->sctp_ep.def_cookie_life; + asoc->sctp_cmt_on_off = inp->sctp_cmt_on_off; + asoc->ecn_supported = inp->ecn_supported; + asoc->prsctp_supported = inp->prsctp_supported; + asoc->auth_supported = inp->auth_supported; + asoc->asconf_supported = inp->asconf_supported; + asoc->reconfig_supported = inp->reconfig_supported; + asoc->nrsack_supported = inp->nrsack_supported; + asoc->pktdrop_supported = inp->pktdrop_supported; + asoc->idata_supported = inp->idata_supported; + asoc->zero_checksum = inp->zero_checksum; + asoc->sctp_cmt_pf = (uint8_t)0; + asoc->sctp_frag_point = inp->sctp_frag_point; + asoc->sctp_features = inp->sctp_features; + asoc->default_dscp = inp->sctp_ep.default_dscp; + asoc->max_cwnd = inp->max_cwnd; +#ifdef INET6 + if (inp->sctp_ep.default_flowlabel) { + asoc->default_flowlabel = inp->sctp_ep.default_flowlabel; + } else { + if (inp->ip_inp.inp.inp_flags & IN6P_AUTOFLOWLABEL) { + asoc->default_flowlabel = sctp_select_initial_TSN(&inp->sctp_ep); + asoc->default_flowlabel &= 0x000fffff; + asoc->default_flowlabel |= 0x80000000; + } else { + asoc->default_flowlabel = 0; + } + } +#endif + asoc->sb_send_resv = 0; + if (override_tag) { + asoc->my_vtag = override_tag; + } else { + asoc->my_vtag = sctp_select_a_tag(inp, stcb->sctp_ep->sctp_lport, stcb->rport, 1); + } + /* Get the nonce tags */ + asoc->my_vtag_nonce = sctp_select_a_tag(inp, stcb->sctp_ep->sctp_lport, stcb->rport, 0); + asoc->peer_vtag_nonce = sctp_select_a_tag(inp, stcb->sctp_ep->sctp_lport, stcb->rport, 0); + asoc->vrf_id = vrf_id; + +#ifdef SCTP_ASOCLOG_OF_TSNS + asoc->tsn_in_at = 0; + asoc->tsn_out_at = 0; + asoc->tsn_in_wrapped = 0; + asoc->tsn_out_wrapped = 0; + asoc->cumack_log_at = 0; + asoc->cumack_log_atsnt = 0; +#endif +#ifdef SCTP_FS_SPEC_LOG + asoc->fs_index = 0; +#endif + asoc->refcnt = 0; + asoc->assoc_up_sent = 0; + if (override_tag) { + asoc->init_seq_number = initial_tsn; + } else { + asoc->init_seq_number = sctp_select_initial_TSN(&inp->sctp_ep); + } + asoc->asconf_seq_out = asoc->init_seq_number; + asoc->str_reset_seq_out = asoc->init_seq_number; + asoc->sending_seq = asoc->init_seq_number; + asoc->asconf_seq_out_acked = asoc->init_seq_number - 1; + /* we are optimistic here */ + asoc->peer_supports_nat = 0; + asoc->sent_queue_retran_cnt = 0; + + /* for CMT */ + asoc->last_net_cmt_send_started = NULL; + + asoc->last_acked_seq = asoc->init_seq_number - 1; + asoc->advanced_peer_ack_point = asoc->init_seq_number - 1; + asoc->asconf_seq_in = asoc->init_seq_number - 1; + + /* here we are different, we hold the next one we expect */ + asoc->str_reset_seq_in = asoc->init_seq_number; + + asoc->initial_init_rto_max = inp->sctp_ep.initial_init_rto_max; + asoc->initial_rto = inp->sctp_ep.initial_rto; + + asoc->default_mtu = inp->sctp_ep.default_mtu; + asoc->max_init_times = inp->sctp_ep.max_init_times; + asoc->max_send_times = inp->sctp_ep.max_send_times; + asoc->def_net_failure = inp->sctp_ep.def_net_failure; + asoc->def_net_pf_threshold = inp->sctp_ep.def_net_pf_threshold; + asoc->free_chunk_cnt = 0; + + asoc->iam_blocking = 0; + asoc->context = inp->sctp_context; + asoc->local_strreset_support = inp->local_strreset_support; + asoc->def_send = inp->def_send; + asoc->delayed_ack = sctp_ticks_to_msecs(inp->sctp_ep.sctp_timeoutticks[SCTP_TIMER_RECV]); + asoc->sack_freq = inp->sctp_ep.sctp_sack_freq; + asoc->pr_sctp_cnt = 0; + asoc->total_output_queue_size = 0; + + if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { + asoc->scope.ipv6_addr_legal = 1; + if (SCTP_IPV6_V6ONLY(inp) == 0) { + asoc->scope.ipv4_addr_legal = 1; + } else { + asoc->scope.ipv4_addr_legal = 0; + } +#if defined(__Userspace__) + asoc->scope.conn_addr_legal = 0; +#endif + } else { + asoc->scope.ipv6_addr_legal = 0; +#if defined(__Userspace__) + if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_CONN) { + asoc->scope.conn_addr_legal = 1; + asoc->scope.ipv4_addr_legal = 0; + } else { + asoc->scope.conn_addr_legal = 0; + asoc->scope.ipv4_addr_legal = 1; + } +#else + asoc->scope.ipv4_addr_legal = 1; +#endif + } + + asoc->my_rwnd = max(SCTP_SB_LIMIT_RCV(inp->sctp_socket), SCTP_MINIMAL_RWND); + asoc->peers_rwnd = SCTP_SB_LIMIT_RCV(inp->sctp_socket); + + asoc->smallest_mtu = 0; + asoc->minrto = inp->sctp_ep.sctp_minrto; + asoc->maxrto = inp->sctp_ep.sctp_maxrto; + + asoc->stream_locked_on = 0; + asoc->ecn_echo_cnt_onq = 0; + asoc->stream_locked = 0; + + asoc->send_sack = 1; + + LIST_INIT(&asoc->sctp_restricted_addrs); + + TAILQ_INIT(&asoc->nets); + TAILQ_INIT(&asoc->pending_reply_queue); + TAILQ_INIT(&asoc->asconf_ack_sent); + /* Setup to fill the hb random cache at first HB */ + asoc->hb_random_idx = 4; + + asoc->sctp_autoclose_ticks = inp->sctp_ep.auto_close_time; + + stcb->asoc.congestion_control_module = inp->sctp_ep.sctp_default_cc_module; + stcb->asoc.cc_functions = sctp_cc_functions[inp->sctp_ep.sctp_default_cc_module]; + + stcb->asoc.stream_scheduling_module = inp->sctp_ep.sctp_default_ss_module; + stcb->asoc.ss_functions = sctp_ss_functions[inp->sctp_ep.sctp_default_ss_module]; + + /* + * Now the stream parameters, here we allocate space for all streams + * that we request by default. + */ + asoc->strm_realoutsize = asoc->streamoutcnt = asoc->pre_open_streams = + o_strms; + SCTP_MALLOC(asoc->strmout, struct sctp_stream_out *, + asoc->streamoutcnt * sizeof(struct sctp_stream_out), + SCTP_M_STRMO); + if (asoc->strmout == NULL) { + /* big trouble no memory */ + SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, ENOMEM); + return (ENOMEM); + } + SCTP_TCB_LOCK(stcb); + for (i = 0; i < asoc->streamoutcnt; i++) { + /* + * inbound side must be set to 0xffff, also NOTE when we get + * the INIT-ACK back (for INIT sender) we MUST reduce the + * count (streamoutcnt) but first check if we sent to any of + * the upper streams that were dropped (if some were). Those + * that were dropped must be notified to the upper layer as + * failed to send. + */ + TAILQ_INIT(&asoc->strmout[i].outqueue); + asoc->ss_functions.sctp_ss_init_stream(stcb, &asoc->strmout[i], NULL); + asoc->strmout[i].chunks_on_queues = 0; +#if defined(SCTP_DETAILED_STR_STATS) + for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) { + asoc->strmout[i].abandoned_sent[j] = 0; + asoc->strmout[i].abandoned_unsent[j] = 0; + } +#else + asoc->strmout[i].abandoned_sent[0] = 0; + asoc->strmout[i].abandoned_unsent[0] = 0; +#endif + asoc->strmout[i].next_mid_ordered = 0; + asoc->strmout[i].next_mid_unordered = 0; + asoc->strmout[i].sid = i; + asoc->strmout[i].last_msg_incomplete = 0; + asoc->strmout[i].state = SCTP_STREAM_OPENING; + } + asoc->ss_functions.sctp_ss_init(stcb, asoc); + SCTP_TCB_UNLOCK(stcb); + + /* Now the mapping array */ + asoc->mapping_array_size = SCTP_INITIAL_MAPPING_ARRAY; + SCTP_MALLOC(asoc->mapping_array, uint8_t *, asoc->mapping_array_size, + SCTP_M_MAP); + if (asoc->mapping_array == NULL) { + SCTP_FREE(asoc->strmout, SCTP_M_STRMO); + SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, ENOMEM); + return (ENOMEM); + } + memset(asoc->mapping_array, 0, asoc->mapping_array_size); + SCTP_MALLOC(asoc->nr_mapping_array, uint8_t *, asoc->mapping_array_size, + SCTP_M_MAP); + if (asoc->nr_mapping_array == NULL) { + SCTP_FREE(asoc->strmout, SCTP_M_STRMO); + SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); + SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, ENOMEM); + return (ENOMEM); + } + memset(asoc->nr_mapping_array, 0, asoc->mapping_array_size); + + /* Now the init of the other outqueues */ + TAILQ_INIT(&asoc->free_chunks); + TAILQ_INIT(&asoc->control_send_queue); + TAILQ_INIT(&asoc->asconf_send_queue); + TAILQ_INIT(&asoc->send_queue); + TAILQ_INIT(&asoc->sent_queue); + TAILQ_INIT(&asoc->resetHead); + asoc->max_inbound_streams = inp->sctp_ep.max_open_streams_intome; + TAILQ_INIT(&asoc->asconf_queue); + /* authentication fields */ + asoc->authinfo.random = NULL; + asoc->authinfo.active_keyid = 0; + asoc->authinfo.assoc_key = NULL; + asoc->authinfo.assoc_keyid = 0; + asoc->authinfo.recv_key = NULL; + asoc->authinfo.recv_keyid = 0; + LIST_INIT(&asoc->shared_keys); + asoc->marked_retrans = 0; + asoc->port = inp->sctp_ep.port; + asoc->timoinit = 0; + asoc->timodata = 0; + asoc->timosack = 0; + asoc->timoshutdown = 0; + asoc->timoheartbeat = 0; + asoc->timocookie = 0; + asoc->timoshutdownack = 0; + (void)SCTP_GETTIME_TIMEVAL(&asoc->start_time); + asoc->discontinuity_time = asoc->start_time; + for (i = 0; i < SCTP_PR_SCTP_MAX + 1; i++) { + asoc->abandoned_unsent[i] = 0; + asoc->abandoned_sent[i] = 0; + } + /* sa_ignore MEMLEAK {memory is put in the assoc mapping array and freed later when + * the association is freed. + */ + return (0); +} + +void +sctp_print_mapping_array(struct sctp_association *asoc) +{ + unsigned int i, limit; + + SCTP_PRINTF("Mapping array size: %d, baseTSN: %8.8x, cumAck: %8.8x, highestTSN: (%8.8x, %8.8x).\n", + asoc->mapping_array_size, + asoc->mapping_array_base_tsn, + asoc->cumulative_tsn, + asoc->highest_tsn_inside_map, + asoc->highest_tsn_inside_nr_map); + for (limit = asoc->mapping_array_size; limit > 1; limit--) { + if (asoc->mapping_array[limit - 1] != 0) { + break; + } + } + SCTP_PRINTF("Renegable mapping array (last %d entries are zero):\n", asoc->mapping_array_size - limit); + for (i = 0; i < limit; i++) { + SCTP_PRINTF("%2.2x%c", asoc->mapping_array[i], ((i + 1) % 16) ? ' ' : '\n'); + } + if (limit % 16) + SCTP_PRINTF("\n"); + for (limit = asoc->mapping_array_size; limit > 1; limit--) { + if (asoc->nr_mapping_array[limit - 1]) { + break; + } + } + SCTP_PRINTF("Non renegable mapping array (last %d entries are zero):\n", asoc->mapping_array_size - limit); + for (i = 0; i < limit; i++) { + SCTP_PRINTF("%2.2x%c", asoc->nr_mapping_array[i], ((i + 1) % 16) ? ' ': '\n'); + } + if (limit % 16) + SCTP_PRINTF("\n"); +} + +int +sctp_expand_mapping_array(struct sctp_association *asoc, uint32_t needed) +{ + /* mapping array needs to grow */ + uint8_t *new_array1, *new_array2; + uint32_t new_size; + + new_size = asoc->mapping_array_size + ((needed+7)/8 + SCTP_MAPPING_ARRAY_INCR); + SCTP_MALLOC(new_array1, uint8_t *, new_size, SCTP_M_MAP); + SCTP_MALLOC(new_array2, uint8_t *, new_size, SCTP_M_MAP); + if ((new_array1 == NULL) || (new_array2 == NULL)) { + /* can't get more, forget it */ + SCTP_PRINTF("No memory for expansion of SCTP mapping array %d\n", new_size); + if (new_array1) { + SCTP_FREE(new_array1, SCTP_M_MAP); + } + if (new_array2) { + SCTP_FREE(new_array2, SCTP_M_MAP); + } + return (-1); + } + memset(new_array1, 0, new_size); + memset(new_array2, 0, new_size); + memcpy(new_array1, asoc->mapping_array, asoc->mapping_array_size); + memcpy(new_array2, asoc->nr_mapping_array, asoc->mapping_array_size); + SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); + SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); + asoc->mapping_array = new_array1; + asoc->nr_mapping_array = new_array2; + asoc->mapping_array_size = new_size; + return (0); +} + +static void +sctp_iterator_work(struct sctp_iterator *it) +{ +#if defined(__FreeBSD__) && !defined(__Userspace__) + struct epoch_tracker et; +#endif + struct sctp_inpcb *tinp; + int iteration_count = 0; + int inp_skip = 0; + int first_in = 1; + +#if defined(__FreeBSD__) && !defined(__Userspace__) + NET_EPOCH_ENTER(et); +#endif + SCTP_INP_INFO_RLOCK(); + SCTP_ITERATOR_LOCK(); + sctp_it_ctl.cur_it = it; + if (it->inp) { + SCTP_INP_RLOCK(it->inp); + SCTP_INP_DECR_REF(it->inp); + } + if (it->inp == NULL) { + /* iterator is complete */ +done_with_iterator: + sctp_it_ctl.cur_it = NULL; + SCTP_ITERATOR_UNLOCK(); + SCTP_INP_INFO_RUNLOCK(); + if (it->function_atend != NULL) { + (*it->function_atend) (it->pointer, it->val); + } + SCTP_FREE(it, SCTP_M_ITER); +#if defined(__FreeBSD__) && !defined(__Userspace__) + NET_EPOCH_EXIT(et); +#endif + return; + } +select_a_new_ep: + if (first_in) { + first_in = 0; + } else { + SCTP_INP_RLOCK(it->inp); + } + while (((it->pcb_flags) && + ((it->inp->sctp_flags & it->pcb_flags) != it->pcb_flags)) || + ((it->pcb_features) && + ((it->inp->sctp_features & it->pcb_features) != it->pcb_features))) { + /* endpoint flags or features don't match, so keep looking */ + if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { + SCTP_INP_RUNLOCK(it->inp); + goto done_with_iterator; + } + tinp = it->inp; + it->inp = LIST_NEXT(it->inp, sctp_list); + it->stcb = NULL; + SCTP_INP_RUNLOCK(tinp); + if (it->inp == NULL) { + goto done_with_iterator; + } + SCTP_INP_RLOCK(it->inp); + } + /* now go through each assoc which is in the desired state */ + if (it->done_current_ep == 0) { + if (it->function_inp != NULL) + inp_skip = (*it->function_inp)(it->inp, it->pointer, it->val); + it->done_current_ep = 1; + } + if (it->stcb == NULL) { + /* run the per instance function */ + it->stcb = LIST_FIRST(&it->inp->sctp_asoc_list); + } + if ((inp_skip) || it->stcb == NULL) { + if (it->function_inp_end != NULL) { + inp_skip = (*it->function_inp_end)(it->inp, + it->pointer, + it->val); + } + SCTP_INP_RUNLOCK(it->inp); + goto no_stcb; + } + while (it->stcb != NULL) { + SCTP_TCB_LOCK(it->stcb); + if (it->asoc_state && ((it->stcb->asoc.state & it->asoc_state) != it->asoc_state)) { + /* not in the right state... keep looking */ + SCTP_TCB_UNLOCK(it->stcb); + goto next_assoc; + } + /* see if we have limited out the iterator loop */ + iteration_count++; + if (iteration_count > SCTP_ITERATOR_MAX_AT_ONCE) { + /* Pause to let others grab the lock */ + atomic_add_int(&it->stcb->asoc.refcnt, 1); + SCTP_TCB_UNLOCK(it->stcb); + SCTP_INP_INCR_REF(it->inp); + SCTP_INP_RUNLOCK(it->inp); + SCTP_ITERATOR_UNLOCK(); + SCTP_INP_INFO_RUNLOCK(); + SCTP_INP_INFO_RLOCK(); + SCTP_ITERATOR_LOCK(); + if (sctp_it_ctl.iterator_flags) { + /* We won't be staying here */ + SCTP_INP_DECR_REF(it->inp); + atomic_subtract_int(&it->stcb->asoc.refcnt, 1); +#if !(defined(__FreeBSD__) && !defined(__Userspace__)) + if (sctp_it_ctl.iterator_flags & + SCTP_ITERATOR_MUST_EXIT) { + goto done_with_iterator; + } +#endif + if (sctp_it_ctl.iterator_flags & + SCTP_ITERATOR_STOP_CUR_IT) { + sctp_it_ctl.iterator_flags &= ~SCTP_ITERATOR_STOP_CUR_IT; + goto done_with_iterator; + } + if (sctp_it_ctl.iterator_flags & + SCTP_ITERATOR_STOP_CUR_INP) { + sctp_it_ctl.iterator_flags &= ~SCTP_ITERATOR_STOP_CUR_INP; + goto no_stcb; + } + /* If we reach here huh? */ + SCTP_PRINTF("Unknown it ctl flag %x\n", + sctp_it_ctl.iterator_flags); + sctp_it_ctl.iterator_flags = 0; + } + SCTP_INP_RLOCK(it->inp); + SCTP_INP_DECR_REF(it->inp); + SCTP_TCB_LOCK(it->stcb); + atomic_subtract_int(&it->stcb->asoc.refcnt, 1); + iteration_count = 0; + } + KASSERT(it->inp == it->stcb->sctp_ep, + ("%s: stcb %p does not belong to inp %p, but inp %p", + __func__, it->stcb, it->inp, it->stcb->sctp_ep)); + SCTP_INP_RLOCK_ASSERT(it->inp); + SCTP_TCB_LOCK_ASSERT(it->stcb); + + /* run function on this one */ + (*it->function_assoc)(it->inp, it->stcb, it->pointer, it->val); + SCTP_INP_RLOCK_ASSERT(it->inp); + SCTP_TCB_LOCK_ASSERT(it->stcb); + + /* + * we lie here, it really needs to have its own type but + * first I must verify that this won't effect things :-0 + */ + if (it->no_chunk_output == 0) { + sctp_chunk_output(it->inp, it->stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED); + SCTP_INP_RLOCK_ASSERT(it->inp); + SCTP_TCB_LOCK_ASSERT(it->stcb); + } + + SCTP_TCB_UNLOCK(it->stcb); + next_assoc: + it->stcb = LIST_NEXT(it->stcb, sctp_tcblist); + if (it->stcb == NULL) { + /* Run last function */ + if (it->function_inp_end != NULL) { + inp_skip = (*it->function_inp_end)(it->inp, + it->pointer, + it->val); + } + } + } + SCTP_INP_RUNLOCK(it->inp); + no_stcb: + /* done with all assocs on this endpoint, move on to next endpoint */ + it->done_current_ep = 0; + if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { + it->inp = NULL; + } else { + it->inp = LIST_NEXT(it->inp, sctp_list); + } + it->stcb = NULL; + if (it->inp == NULL) { + goto done_with_iterator; + } + goto select_a_new_ep; +} + +void +sctp_iterator_worker(void) +{ + struct sctp_iterator *it; + + /* This function is called with the WQ lock in place */ + sctp_it_ctl.iterator_running = 1; + while ((it = TAILQ_FIRST(&sctp_it_ctl.iteratorhead)) != NULL) { + /* now lets work on this one */ + TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); + SCTP_IPI_ITERATOR_WQ_UNLOCK(); +#if defined(__FreeBSD__) && !defined(__Userspace__) + CURVNET_SET(it->vn); +#endif + sctp_iterator_work(it); +#if defined(__FreeBSD__) && !defined(__Userspace__) + CURVNET_RESTORE(); +#endif + SCTP_IPI_ITERATOR_WQ_LOCK(); +#if !defined(__FreeBSD__) && !defined(__Userspace__) + if (sctp_it_ctl.iterator_flags & SCTP_ITERATOR_MUST_EXIT) { + break; + } +#endif + /*sa_ignore FREED_MEMORY*/ + } + sctp_it_ctl.iterator_running = 0; + return; +} + +static void +sctp_handle_addr_wq(void) +{ + /* deal with the ADDR wq from the rtsock calls */ + struct sctp_laddr *wi, *nwi; + struct sctp_asconf_iterator *asc; + + SCTP_MALLOC(asc, struct sctp_asconf_iterator *, + sizeof(struct sctp_asconf_iterator), SCTP_M_ASC_IT); + if (asc == NULL) { + /* Try later, no memory */ + sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, + (struct sctp_inpcb *)NULL, + (struct sctp_tcb *)NULL, + (struct sctp_nets *)NULL); + return; + } + LIST_INIT(&asc->list_of_work); + asc->cnt = 0; + + LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { + LIST_REMOVE(wi, sctp_nxt_addr); + LIST_INSERT_HEAD(&asc->list_of_work, wi, sctp_nxt_addr); + asc->cnt++; + } + + if (asc->cnt == 0) { + SCTP_FREE(asc, SCTP_M_ASC_IT); + } else { + int ret; + + ret = sctp_initiate_iterator(sctp_asconf_iterator_ep, + sctp_asconf_iterator_stcb, + NULL, /* No ep end for boundall */ + SCTP_PCB_FLAGS_BOUNDALL, + SCTP_PCB_ANY_FEATURES, + SCTP_ASOC_ANY_STATE, + (void *)asc, 0, + sctp_asconf_iterator_end, NULL, 0); + if (ret) { + SCTP_PRINTF("Failed to initiate iterator for handle_addr_wq\n"); + /* Freeing if we are stopping or put back on the addr_wq. */ + if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { + sctp_asconf_iterator_end(asc, 0); + } else { + LIST_FOREACH(wi, &asc->list_of_work, sctp_nxt_addr) { + LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); + } + SCTP_FREE(asc, SCTP_M_ASC_IT); + } + } + } +} + +/*- + * The following table shows which pointers for the inp, stcb, or net are + * stored for each timer after it was started. + * + *|Name |Timer |inp |stcb|net | + *|-----------------------------|-----------------------------|----|----|----| + *|SCTP_TIMER_TYPE_SEND |net->rxt_timer |Yes |Yes |Yes | + *|SCTP_TIMER_TYPE_INIT |net->rxt_timer |Yes |Yes |Yes | + *|SCTP_TIMER_TYPE_RECV |stcb->asoc.dack_timer |Yes |Yes |No | + *|SCTP_TIMER_TYPE_SHUTDOWN |net->rxt_timer |Yes |Yes |Yes | + *|SCTP_TIMER_TYPE_HEARTBEAT |net->hb_timer |Yes |Yes |Yes | + *|SCTP_TIMER_TYPE_COOKIE |net->rxt_timer |Yes |Yes |Yes | + *|SCTP_TIMER_TYPE_NEWCOOKIE |inp->sctp_ep.signature_change|Yes |No |No | + *|SCTP_TIMER_TYPE_PATHMTURAISE |net->pmtu_timer |Yes |Yes |Yes | + *|SCTP_TIMER_TYPE_SHUTDOWNACK |net->rxt_timer |Yes |Yes |Yes | + *|SCTP_TIMER_TYPE_ASCONF |stcb->asoc.asconf_timer |Yes |Yes |Yes | + *|SCTP_TIMER_TYPE_SHUTDOWNGUARD|stcb->asoc.shut_guard_timer |Yes |Yes |No | + *|SCTP_TIMER_TYPE_AUTOCLOSE |stcb->asoc.autoclose_timer |Yes |Yes |No | + *|SCTP_TIMER_TYPE_STRRESET |stcb->asoc.strreset_timer |Yes |Yes |No | + *|SCTP_TIMER_TYPE_INPKILL |inp->sctp_ep.signature_change|Yes |No |No | + *|SCTP_TIMER_TYPE_ASOCKILL |stcb->asoc.strreset_timer |Yes |Yes |No | + *|SCTP_TIMER_TYPE_ADDR_WQ |SCTP_BASE_INFO(addr_wq_timer)|No |No |No | + *|SCTP_TIMER_TYPE_PRIM_DELETED |stcb->asoc.delete_prim_timer |Yes |Yes |No | + */ + +void +sctp_timeout_handler(void *t) +{ +#if defined(__FreeBSD__) && !defined(__Userspace__) + struct epoch_tracker et; +#endif + struct timeval tv; + struct sctp_inpcb *inp; + struct sctp_tcb *stcb; + struct sctp_nets *net; + struct sctp_timer *tmr; + struct mbuf *op_err; +#if defined(__APPLE__) && !defined(__Userspace__) + struct socket *so; +#endif +#if defined(__Userspace__) + struct socket *upcall_socket = NULL; +#endif + int type; + int i, secret; + bool did_output, released_asoc_reference; + + /* + * If inp, stcb or net are not NULL, then references to these were + * added when the timer was started, and must be released before this + * function returns. + */ + tmr = (struct sctp_timer *)t; + inp = (struct sctp_inpcb *)tmr->ep; + stcb = (struct sctp_tcb *)tmr->tcb; + net = (struct sctp_nets *)tmr->net; +#if defined(__FreeBSD__) && !defined(__Userspace__) + CURVNET_SET((struct vnet *)tmr->vnet); + NET_EPOCH_ENTER(et); +#endif + released_asoc_reference = false; + +#ifdef SCTP_AUDITING_ENABLED + sctp_audit_log(0xF0, (uint8_t) tmr->type); + sctp_auditing(3, inp, stcb, net); +#endif + + /* sanity checks... */ + KASSERT(tmr->self == NULL || tmr->self == tmr, + ("sctp_timeout_handler: tmr->self corrupted")); + KASSERT(SCTP_IS_TIMER_TYPE_VALID(tmr->type), + ("sctp_timeout_handler: invalid timer type %d", tmr->type)); + type = tmr->type; + KASSERT(stcb == NULL || stcb->sctp_ep == inp, + ("sctp_timeout_handler of type %d: inp = %p, stcb->sctp_ep %p", + type, stcb, stcb->sctp_ep)); + tmr->stopped_from = 0xa001; + if ((stcb != NULL) && (stcb->asoc.state == SCTP_STATE_EMPTY)) { + SCTPDBG(SCTP_DEBUG_TIMER2, + "Timer type %d handler exiting due to CLOSED association.\n", + type); + goto out_decr; + } + tmr->stopped_from = 0xa002; + SCTPDBG(SCTP_DEBUG_TIMER2, "Timer type %d goes off.\n", type); + if (!SCTP_OS_TIMER_ACTIVE(&tmr->timer)) { + SCTPDBG(SCTP_DEBUG_TIMER2, + "Timer type %d handler exiting due to not being active.\n", + type); + goto out_decr; + } + + tmr->stopped_from = 0xa003; + if (stcb) { + SCTP_TCB_LOCK(stcb); + /* + * Release reference so that association can be freed if + * necessary below. + * This is safe now that we have acquired the lock. + */ + atomic_subtract_int(&stcb->asoc.refcnt, 1); + released_asoc_reference = true; + if ((type != SCTP_TIMER_TYPE_ASOCKILL) && + ((stcb->asoc.state == SCTP_STATE_EMPTY) || + (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED))) { + SCTPDBG(SCTP_DEBUG_TIMER2, + "Timer type %d handler exiting due to CLOSED association.\n", + type); + goto out; + } + } else if (inp != NULL) { + SCTP_INP_WLOCK(inp); + } else { + SCTP_WQ_ADDR_LOCK(); + } + + /* Record in stopped_from which timeout occurred. */ + tmr->stopped_from = type; + /* mark as being serviced now */ + if (SCTP_OS_TIMER_PENDING(&tmr->timer)) { + /* + * Callout has been rescheduled. + */ + goto out; + } + if (!SCTP_OS_TIMER_ACTIVE(&tmr->timer)) { + /* + * Not active, so no action. + */ + goto out; + } + SCTP_OS_TIMER_DEACTIVATE(&tmr->timer); + +#if defined(__Userspace__) + if ((stcb != NULL) && + ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) && + (stcb->sctp_socket != NULL)) { + upcall_socket = stcb->sctp_socket; + SOCK_LOCK(upcall_socket); + soref(upcall_socket); + SOCK_UNLOCK(upcall_socket); + } +#endif + /* call the handler for the appropriate timer type */ + switch (type) { + case SCTP_TIMER_TYPE_SEND: + KASSERT(inp != NULL && stcb != NULL && net != NULL, + ("timeout of type %d: inp = %p, stcb = %p, net = %p", + type, inp, stcb, net)); + SCTP_STAT_INCR(sctps_timodata); + stcb->asoc.timodata++; + stcb->asoc.num_send_timers_up--; + if (stcb->asoc.num_send_timers_up < 0) { + stcb->asoc.num_send_timers_up = 0; + } + SCTP_TCB_LOCK_ASSERT(stcb); + if (sctp_t3rxt_timer(inp, stcb, net)) { + /* no need to unlock on tcb its gone */ + + goto out_decr; + } + SCTP_TCB_LOCK_ASSERT(stcb); +#ifdef SCTP_AUDITING_ENABLED + sctp_auditing(4, inp, stcb, net); +#endif + sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED); + did_output = true; + if ((stcb->asoc.num_send_timers_up == 0) && + (stcb->asoc.sent_queue_cnt > 0)) { + struct sctp_tmit_chunk *chk; + + /* + * Safeguard. If there on some on the sent queue + * somewhere but no timers running something is + * wrong... so we start a timer on the first chunk + * on the send queue on whatever net it is sent to. + */ + TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { + if (chk->whoTo != NULL) { + break; + } + } + if (chk != NULL) { + sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo); + } + } + break; + case SCTP_TIMER_TYPE_INIT: + KASSERT(inp != NULL && stcb != NULL && net != NULL, + ("timeout of type %d: inp = %p, stcb = %p, net = %p", + type, inp, stcb, net)); + SCTP_STAT_INCR(sctps_timoinit); + stcb->asoc.timoinit++; + if (sctp_t1init_timer(inp, stcb, net)) { + /* no need to unlock on tcb its gone */ + goto out_decr; + } + did_output = false; + break; + case SCTP_TIMER_TYPE_RECV: + KASSERT(inp != NULL && stcb != NULL && net == NULL, + ("timeout of type %d: inp = %p, stcb = %p, net = %p", + type, inp, stcb, net)); + SCTP_STAT_INCR(sctps_timosack); + stcb->asoc.timosack++; + sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); +#ifdef SCTP_AUDITING_ENABLED + sctp_auditing(4, inp, stcb, NULL); +#endif + sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_SACK_TMR, SCTP_SO_NOT_LOCKED); + did_output = true; + break; + case SCTP_TIMER_TYPE_SHUTDOWN: + KASSERT(inp != NULL && stcb != NULL && net != NULL, + ("timeout of type %d: inp = %p, stcb = %p, net = %p", + type, inp, stcb, net)); + SCTP_STAT_INCR(sctps_timoshutdown); + stcb->asoc.timoshutdown++; + if (sctp_shutdown_timer(inp, stcb, net)) { + /* no need to unlock on tcb its gone */ + goto out_decr; + } +#ifdef SCTP_AUDITING_ENABLED + sctp_auditing(4, inp, stcb, net); +#endif + sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_NOT_LOCKED); + did_output = true; + break; + case SCTP_TIMER_TYPE_HEARTBEAT: + KASSERT(inp != NULL && stcb != NULL && net != NULL, + ("timeout of type %d: inp = %p, stcb = %p, net = %p", + type, inp, stcb, net)); + SCTP_STAT_INCR(sctps_timoheartbeat); + stcb->asoc.timoheartbeat++; + if (sctp_heartbeat_timer(inp, stcb, net)) { + /* no need to unlock on tcb its gone */ + goto out_decr; + } +#ifdef SCTP_AUDITING_ENABLED + sctp_auditing(4, inp, stcb, net); +#endif + if ((net->dest_state & SCTP_ADDR_NOHB) == 0) { + sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net); + sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_HB_TMR, SCTP_SO_NOT_LOCKED); + did_output = true; + } else { + did_output = false; + } + break; + case SCTP_TIMER_TYPE_COOKIE: + KASSERT(inp != NULL && stcb != NULL && net != NULL, + ("timeout of type %d: inp = %p, stcb = %p, net = %p", + type, inp, stcb, net)); + SCTP_STAT_INCR(sctps_timocookie); + stcb->asoc.timocookie++; + if (sctp_cookie_timer(inp, stcb, net)) { + /* no need to unlock on tcb its gone */ + goto out_decr; + } +#ifdef SCTP_AUDITING_ENABLED + sctp_auditing(4, inp, stcb, net); +#endif + /* + * We consider T3 and Cookie timer pretty much the same with + * respect to where from in chunk_output. + */ + sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED); + did_output = true; + break; + case SCTP_TIMER_TYPE_NEWCOOKIE: + KASSERT(inp != NULL && stcb == NULL && net == NULL, + ("timeout of type %d: inp = %p, stcb = %p, net = %p", + type, inp, stcb, net)); + SCTP_STAT_INCR(sctps_timosecret); + (void)SCTP_GETTIME_TIMEVAL(&tv); + inp->sctp_ep.time_of_secret_change = (unsigned int)tv.tv_sec; + inp->sctp_ep.last_secret_number = + inp->sctp_ep.current_secret_number; + inp->sctp_ep.current_secret_number++; + if (inp->sctp_ep.current_secret_number >= + SCTP_HOW_MANY_SECRETS) { + inp->sctp_ep.current_secret_number = 0; + } + secret = (int)inp->sctp_ep.current_secret_number; + for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { + inp->sctp_ep.secret_key[secret][i] = + sctp_select_initial_TSN(&inp->sctp_ep); + } + sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); + did_output = false; + break; + case SCTP_TIMER_TYPE_PATHMTURAISE: + KASSERT(inp != NULL && stcb != NULL && net != NULL, + ("timeout of type %d: inp = %p, stcb = %p, net = %p", + type, inp, stcb, net)); + SCTP_STAT_INCR(sctps_timopathmtu); + sctp_pathmtu_timer(inp, stcb, net); + did_output = false; + break; + case SCTP_TIMER_TYPE_SHUTDOWNACK: + KASSERT(inp != NULL && stcb != NULL && net != NULL, + ("timeout of type %d: inp = %p, stcb = %p, net = %p", + type, inp, stcb, net)); + if (sctp_shutdownack_timer(inp, stcb, net)) { + /* no need to unlock on tcb its gone */ + goto out_decr; + } + SCTP_STAT_INCR(sctps_timoshutdownack); + stcb->asoc.timoshutdownack++; +#ifdef SCTP_AUDITING_ENABLED + sctp_auditing(4, inp, stcb, net); +#endif + sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_SHUT_ACK_TMR, SCTP_SO_NOT_LOCKED); + did_output = true; + break; + case SCTP_TIMER_TYPE_ASCONF: + KASSERT(inp != NULL && stcb != NULL && net != NULL, + ("timeout of type %d: inp = %p, stcb = %p, net = %p", + type, inp, stcb, net)); + SCTP_STAT_INCR(sctps_timoasconf); + if (sctp_asconf_timer(inp, stcb, net)) { + /* no need to unlock on tcb its gone */ + goto out_decr; + } +#ifdef SCTP_AUDITING_ENABLED + sctp_auditing(4, inp, stcb, net); +#endif + sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_ASCONF_TMR, SCTP_SO_NOT_LOCKED); + did_output = true; + break; + case SCTP_TIMER_TYPE_SHUTDOWNGUARD: + KASSERT(inp != NULL && stcb != NULL && net == NULL, + ("timeout of type %d: inp = %p, stcb = %p, net = %p", + type, inp, stcb, net)); + SCTP_STAT_INCR(sctps_timoshutdownguard); + op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), + "Shutdown guard timer expired"); + sctp_abort_an_association(inp, stcb, op_err, true, SCTP_SO_NOT_LOCKED); + /* no need to unlock on tcb its gone */ + goto out_decr; + case SCTP_TIMER_TYPE_AUTOCLOSE: + KASSERT(inp != NULL && stcb != NULL && net == NULL, + ("timeout of type %d: inp = %p, stcb = %p, net = %p", + type, inp, stcb, net)); + SCTP_STAT_INCR(sctps_timoautoclose); + sctp_autoclose_timer(inp, stcb); + sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_AUTOCLOSE_TMR, SCTP_SO_NOT_LOCKED); + did_output = true; + break; + case SCTP_TIMER_TYPE_STRRESET: + KASSERT(inp != NULL && stcb != NULL && net == NULL, + ("timeout of type %d: inp = %p, stcb = %p, net = %p", + type, inp, stcb, net)); + SCTP_STAT_INCR(sctps_timostrmrst); + if (sctp_strreset_timer(inp, stcb)) { + /* no need to unlock on tcb its gone */ + goto out_decr; + } + sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_STRRST_TMR, SCTP_SO_NOT_LOCKED); + did_output = true; + break; + case SCTP_TIMER_TYPE_INPKILL: + KASSERT(inp != NULL && stcb == NULL && net == NULL, + ("timeout of type %d: inp = %p, stcb = %p, net = %p", + type, inp, stcb, net)); + SCTP_STAT_INCR(sctps_timoinpkill); + /* + * special case, take away our increment since WE are the + * killer + */ + sctp_timer_stop(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL, + SCTP_FROM_SCTPUTIL + SCTP_LOC_3); +#if defined(__APPLE__) && !defined(__Userspace__) + SCTP_SOCKET_LOCK(SCTP_INP_SO(inp), 1); +#endif + SCTP_INP_DECR_REF(inp); + SCTP_INP_WUNLOCK(inp); + sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT, + SCTP_CALLED_FROM_INPKILL_TIMER); +#if defined(__APPLE__) && !defined(__Userspace__) + SCTP_SOCKET_UNLOCK(SCTP_INP_SO(inp), 1); +#endif + inp = NULL; + goto out_decr; + case SCTP_TIMER_TYPE_ASOCKILL: + KASSERT(inp != NULL && stcb != NULL && net == NULL, + ("timeout of type %d: inp = %p, stcb = %p, net = %p", + type, inp, stcb, net)); + SCTP_STAT_INCR(sctps_timoassockill); + /* Can we free it yet? */ + sctp_timer_stop(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL, + SCTP_FROM_SCTPUTIL + SCTP_LOC_1); +#if defined(__APPLE__) && !defined(__Userspace__) + so = SCTP_INP_SO(inp); + atomic_add_int(&stcb->asoc.refcnt, 1); + SCTP_TCB_UNLOCK(stcb); + SCTP_SOCKET_LOCK(so, 1); + SCTP_TCB_LOCK(stcb); + atomic_subtract_int(&stcb->asoc.refcnt, 1); +#endif + (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, + SCTP_FROM_SCTPUTIL + SCTP_LOC_2); +#if defined(__APPLE__) && !defined(__Userspace__) + SCTP_SOCKET_UNLOCK(so, 1); +#endif + /* + * free asoc, always unlocks (or destroy's) so prevent + * duplicate unlock or unlock of a free mtx :-0 + */ + stcb = NULL; + goto out_decr; + case SCTP_TIMER_TYPE_ADDR_WQ: + KASSERT(inp == NULL && stcb == NULL && net == NULL, + ("timeout of type %d: inp = %p, stcb = %p, net = %p", + type, inp, stcb, net)); + sctp_handle_addr_wq(); + did_output = true; + break; + case SCTP_TIMER_TYPE_PRIM_DELETED: + KASSERT(inp != NULL && stcb != NULL && net == NULL, + ("timeout of type %d: inp = %p, stcb = %p, net = %p", + type, inp, stcb, net)); + SCTP_STAT_INCR(sctps_timodelprim); + sctp_delete_prim_timer(inp, stcb); + did_output = false; + break; + default: +#ifdef INVARIANTS + panic("Unknown timer type %d", type); +#else + goto out; +#endif + } +#ifdef SCTP_AUDITING_ENABLED + sctp_audit_log(0xF1, (uint8_t) type); + if (inp != NULL) + sctp_auditing(5, inp, stcb, net); +#endif + if (did_output && (stcb != NULL)) { + /* + * Now we need to clean up the control chunk chain if an + * ECNE is on it. It must be marked as UNSENT again so next + * call will continue to send it until such time that we get + * a CWR, to remove it. It is, however, less likely that we + * will find a ecn echo on the chain though. + */ + sctp_fix_ecn_echo(&stcb->asoc); + } +out: + if (stcb != NULL) { + SCTP_TCB_UNLOCK(stcb); + } else if (inp != NULL) { + SCTP_INP_WUNLOCK(inp); + } else { + SCTP_WQ_ADDR_UNLOCK(); + } + +out_decr: +#if defined(__Userspace__) + if (upcall_socket != NULL) { + if ((upcall_socket->so_upcall != NULL) && + (upcall_socket->so_error != 0)) { + (*upcall_socket->so_upcall)(upcall_socket, upcall_socket->so_upcallarg, M_NOWAIT); + } + ACCEPT_LOCK(); + SOCK_LOCK(upcall_socket); + sorele(upcall_socket); + } +#endif + /* These reference counts were incremented in sctp_timer_start(). */ + if (inp != NULL) { + SCTP_INP_DECR_REF(inp); + } + if ((stcb != NULL) && !released_asoc_reference) { + atomic_subtract_int(&stcb->asoc.refcnt, 1); + } + if (net != NULL) { + sctp_free_remote_addr(net); + } + SCTPDBG(SCTP_DEBUG_TIMER2, "Timer type %d handler finished.\n", type); +#if defined(__FreeBSD__) && !defined(__Userspace__) + CURVNET_RESTORE(); + NET_EPOCH_EXIT(et); +#endif +} + +/*- + * The following table shows which parameters must be provided + * when calling sctp_timer_start(). For parameters not being + * provided, NULL must be used. + * + * |Name |inp |stcb|net | + * |-----------------------------|----|----|----| + * |SCTP_TIMER_TYPE_SEND |Yes |Yes |Yes | + * |SCTP_TIMER_TYPE_INIT |Yes |Yes |Yes | + * |SCTP_TIMER_TYPE_RECV |Yes |Yes |No | + * |SCTP_TIMER_TYPE_SHUTDOWN |Yes |Yes |Yes | + * |SCTP_TIMER_TYPE_HEARTBEAT |Yes |Yes |Yes | + * |SCTP_TIMER_TYPE_COOKIE |Yes |Yes |Yes | + * |SCTP_TIMER_TYPE_NEWCOOKIE |Yes |No |No | + * |SCTP_TIMER_TYPE_PATHMTURAISE |Yes |Yes |Yes | + * |SCTP_TIMER_TYPE_SHUTDOWNACK |Yes |Yes |Yes | + * |SCTP_TIMER_TYPE_ASCONF |Yes |Yes |Yes | + * |SCTP_TIMER_TYPE_SHUTDOWNGUARD|Yes |Yes |No | + * |SCTP_TIMER_TYPE_AUTOCLOSE |Yes |Yes |No | + * |SCTP_TIMER_TYPE_STRRESET |Yes |Yes |Yes | + * |SCTP_TIMER_TYPE_INPKILL |Yes |No |No | + * |SCTP_TIMER_TYPE_ASOCKILL |Yes |Yes |No | + * |SCTP_TIMER_TYPE_ADDR_WQ |No |No |No | + * |SCTP_TIMER_TYPE_PRIM_DELETED |Yes |Yes |No | + * + */ + +void +sctp_timer_start(int t_type, struct sctp_inpcb *inp, struct sctp_tcb *stcb, + struct sctp_nets *net) +{ + struct sctp_timer *tmr; + uint32_t to_ticks; + uint32_t rndval, jitter; + + KASSERT(stcb == NULL || stcb->sctp_ep == inp, + ("sctp_timer_start of type %d: inp = %p, stcb->sctp_ep %p", + t_type, stcb, stcb->sctp_ep)); + tmr = NULL; + if (stcb != NULL) { + SCTP_TCB_LOCK_ASSERT(stcb); + } else if (inp != NULL) { + SCTP_INP_WLOCK_ASSERT(inp); + } else { + SCTP_WQ_ADDR_LOCK_ASSERT(); + } + if (stcb != NULL) { + /* Don't restart timer on association that's about to be killed. */ + if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && + (t_type != SCTP_TIMER_TYPE_ASOCKILL)) { + SCTPDBG(SCTP_DEBUG_TIMER2, + "Timer type %d not started: inp=%p, stcb=%p, net=%p (stcb deleted).\n", + t_type, inp, stcb, net); + return; + } + /* Don't restart timer on net that's been removed. */ + if (net != NULL && (net->dest_state & SCTP_ADDR_BEING_DELETED)) { + SCTPDBG(SCTP_DEBUG_TIMER2, + "Timer type %d not started: inp=%p, stcb=%p, net=%p (net deleted).\n", + t_type, inp, stcb, net); + return; + } + } + switch (t_type) { + case SCTP_TIMER_TYPE_SEND: + /* Here we use the RTO timer. */ + if ((inp == NULL) || (stcb == NULL) || (net == NULL)) { +#ifdef INVARIANTS + panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p", + t_type, inp, stcb, net); +#else + return; +#endif + } + tmr = &net->rxt_timer; + if (net->RTO == 0) { + to_ticks = sctp_msecs_to_ticks(stcb->asoc.initial_rto); + } else { + to_ticks = sctp_msecs_to_ticks(net->RTO); + } + break; + case SCTP_TIMER_TYPE_INIT: + /* + * Here we use the INIT timer default usually about 1 + * second. + */ + if ((inp == NULL) || (stcb == NULL) || (net == NULL)) { +#ifdef INVARIANTS + panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p", + t_type, inp, stcb, net); +#else + return; +#endif + } + tmr = &net->rxt_timer; + if (net->RTO == 0) { + to_ticks = sctp_msecs_to_ticks(stcb->asoc.initial_rto); + } else { + to_ticks = sctp_msecs_to_ticks(net->RTO); + } + break; + case SCTP_TIMER_TYPE_RECV: + /* + * Here we use the Delayed-Ack timer value from the inp, + * usually about 200ms. + */ + if ((inp == NULL) || (stcb == NULL) || (net != NULL)) { +#ifdef INVARIANTS + panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p", + t_type, inp, stcb, net); +#else + return; +#endif + } + tmr = &stcb->asoc.dack_timer; + to_ticks = sctp_msecs_to_ticks(stcb->asoc.delayed_ack); + break; + case SCTP_TIMER_TYPE_SHUTDOWN: + /* Here we use the RTO of the destination. */ + if ((inp == NULL) || (stcb == NULL) || (net == NULL)) { +#ifdef INVARIANTS + panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p", + t_type, inp, stcb, net); +#else + return; +#endif + } + tmr = &net->rxt_timer; + if (net->RTO == 0) { + to_ticks = sctp_msecs_to_ticks(stcb->asoc.initial_rto); + } else { + to_ticks = sctp_msecs_to_ticks(net->RTO); + } + break; + case SCTP_TIMER_TYPE_HEARTBEAT: + /* + * The net is used here so that we can add in the RTO. Even + * though we use a different timer. We also add the HB timer + * PLUS a random jitter. + */ + if ((inp == NULL) || (stcb == NULL) || (net == NULL)) { +#ifdef INVARIANTS + panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p", + t_type, inp, stcb, net); +#else + return; +#endif + } + if ((net->dest_state & SCTP_ADDR_NOHB) && + ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { + SCTPDBG(SCTP_DEBUG_TIMER2, + "Timer type %d not started: inp=%p, stcb=%p, net=%p.\n", + t_type, inp, stcb, net); + return; + } + tmr = &net->hb_timer; + if (net->RTO == 0) { + to_ticks = stcb->asoc.initial_rto; + } else { + to_ticks = net->RTO; + } + rndval = sctp_select_initial_TSN(&inp->sctp_ep); + jitter = rndval % to_ticks; + if (to_ticks > 1) { + to_ticks >>= 1; + } + if (jitter < (UINT32_MAX - to_ticks)) { + to_ticks += jitter; + } else { + to_ticks = UINT32_MAX; + } + if (!((net->dest_state & SCTP_ADDR_UNCONFIRMED) && + (net->dest_state & SCTP_ADDR_REACHABLE)) && + ((net->dest_state & SCTP_ADDR_PF) == 0)) { + if (net->heart_beat_delay < (UINT32_MAX - to_ticks)) { + to_ticks += net->heart_beat_delay; + } else { + to_ticks = UINT32_MAX; + } + } + /* + * Now we must convert the to_ticks that are now in + * ms to ticks. + */ + to_ticks = sctp_msecs_to_ticks(to_ticks); + break; + case SCTP_TIMER_TYPE_COOKIE: + /* + * Here we can use the RTO timer from the network since one + * RTT was complete. If a retransmission happened then we will + * be using the RTO initial value. + */ + if ((inp == NULL) || (stcb == NULL) || (net == NULL)) { +#ifdef INVARIANTS + panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p", + t_type, inp, stcb, net); +#else + return; +#endif + } + tmr = &net->rxt_timer; + if (net->RTO == 0) { + to_ticks = sctp_msecs_to_ticks(stcb->asoc.initial_rto); + } else { + to_ticks = sctp_msecs_to_ticks(net->RTO); + } + break; + case SCTP_TIMER_TYPE_NEWCOOKIE: + /* + * Nothing needed but the endpoint here usually about 60 + * minutes. + */ + if ((inp == NULL) || (stcb != NULL) || (net != NULL)) { +#ifdef INVARIANTS + panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p", + t_type, inp, stcb, net); +#else + return; +#endif + } + tmr = &inp->sctp_ep.signature_change; + to_ticks = inp->sctp_ep.sctp_timeoutticks[SCTP_TIMER_SIGNATURE]; + break; + case SCTP_TIMER_TYPE_PATHMTURAISE: + /* + * Here we use the value found in the EP for PMTUD, usually + * about 10 minutes. + */ + if ((inp == NULL) || (stcb == NULL) || (net == NULL)) { +#ifdef INVARIANTS + panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p", + t_type, inp, stcb, net); +#else + return; +#endif + } + if (net->dest_state & SCTP_ADDR_NO_PMTUD) { + SCTPDBG(SCTP_DEBUG_TIMER2, + "Timer type %d not started: inp=%p, stcb=%p, net=%p.\n", + t_type, inp, stcb, net); + return; + } + tmr = &net->pmtu_timer; + to_ticks = inp->sctp_ep.sctp_timeoutticks[SCTP_TIMER_PMTU]; + break; + case SCTP_TIMER_TYPE_SHUTDOWNACK: + /* Here we use the RTO of the destination. */ + if ((inp == NULL) || (stcb == NULL) || (net == NULL)) { +#ifdef INVARIANTS + panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p", + t_type, inp, stcb, net); +#else + return; +#endif + } + tmr = &net->rxt_timer; + if (net->RTO == 0) { + to_ticks = sctp_msecs_to_ticks(stcb->asoc.initial_rto); + } else { + to_ticks = sctp_msecs_to_ticks(net->RTO); + } + break; + case SCTP_TIMER_TYPE_ASCONF: + /* + * Here the timer comes from the stcb but its value is from + * the net's RTO. + */ + if ((inp == NULL) || (stcb == NULL) || (net == NULL)) { +#ifdef INVARIANTS + panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p", + t_type, inp, stcb, net); +#else + return; +#endif + } + tmr = &stcb->asoc.asconf_timer; + if (net->RTO == 0) { + to_ticks = sctp_msecs_to_ticks(stcb->asoc.initial_rto); + } else { + to_ticks = sctp_msecs_to_ticks(net->RTO); + } + break; + case SCTP_TIMER_TYPE_SHUTDOWNGUARD: + /* + * Here we use the endpoints shutdown guard timer usually + * about 3 minutes. + */ + if ((inp == NULL) || (stcb == NULL) || (net != NULL)) { +#ifdef INVARIANTS + panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p", + t_type, inp, stcb, net); +#else + return; +#endif + } + tmr = &stcb->asoc.shut_guard_timer; + if (inp->sctp_ep.sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] == 0) { + if (stcb->asoc.maxrto < UINT32_MAX / 5) { + to_ticks = sctp_msecs_to_ticks(5 * stcb->asoc.maxrto); + } else { + to_ticks = sctp_msecs_to_ticks(UINT32_MAX); + } + } else { + to_ticks = inp->sctp_ep.sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN]; + } + break; + case SCTP_TIMER_TYPE_AUTOCLOSE: + if ((inp == NULL) || (stcb == NULL) || (net != NULL)) { +#ifdef INVARIANTS + panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p", + t_type, inp, stcb, net); +#else + return; +#endif + } + tmr = &stcb->asoc.autoclose_timer; + to_ticks = stcb->asoc.sctp_autoclose_ticks; + break; + case SCTP_TIMER_TYPE_STRRESET: + /* + * Here the timer comes from the stcb but its value is from + * the net's RTO. + */ + if ((inp == NULL) || (stcb == NULL) || (net == NULL)) { +#ifdef INVARIANTS + panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p", + t_type, inp, stcb, net); +#else + return; +#endif + } + tmr = &stcb->asoc.strreset_timer; + if (net->RTO == 0) { + to_ticks = sctp_msecs_to_ticks(stcb->asoc.initial_rto); + } else { + to_ticks = sctp_msecs_to_ticks(net->RTO); + } + break; + case SCTP_TIMER_TYPE_INPKILL: + /* + * The inp is setup to die. We re-use the signature_change + * timer since that has stopped and we are in the GONE + * state. + */ + if ((inp == NULL) || (stcb != NULL) || (net != NULL)) { +#ifdef INVARIANTS + panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p", + t_type, inp, stcb, net); +#else + return; +#endif + } + tmr = &inp->sctp_ep.signature_change; + to_ticks = sctp_msecs_to_ticks(SCTP_INP_KILL_TIMEOUT); + break; + case SCTP_TIMER_TYPE_ASOCKILL: + if ((inp == NULL) || (stcb == NULL) || (net != NULL)) { +#ifdef INVARIANTS + panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p", + t_type, inp, stcb, net); +#else + return; +#endif + } + tmr = &stcb->asoc.strreset_timer; + to_ticks = sctp_msecs_to_ticks(SCTP_ASOC_KILL_TIMEOUT); + break; + case SCTP_TIMER_TYPE_ADDR_WQ: + if ((inp != NULL) || (stcb != NULL) || (net != NULL)) { +#ifdef INVARIANTS + panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p", + t_type, inp, stcb, net); +#else + return; +#endif + } + /* Only 1 tick away :-) */ + tmr = &SCTP_BASE_INFO(addr_wq_timer); + to_ticks = SCTP_ADDRESS_TICK_DELAY; + break; + case SCTP_TIMER_TYPE_PRIM_DELETED: + if ((inp == NULL) || (stcb == NULL) || (net != NULL)) { +#ifdef INVARIANTS + panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p", + t_type, inp, stcb, net); +#else + return; +#endif + } + tmr = &stcb->asoc.delete_prim_timer; + to_ticks = sctp_msecs_to_ticks(stcb->asoc.initial_rto); + break; + default: +#ifdef INVARIANTS + panic("Unknown timer type %d", t_type); +#else + return; +#endif + } + KASSERT(tmr != NULL, ("tmr is NULL for timer type %d", t_type)); + KASSERT(to_ticks > 0, ("to_ticks == 0 for timer type %d", t_type)); + if (SCTP_OS_TIMER_PENDING(&tmr->timer)) { + /* + * We do NOT allow you to have it already running. If it is, + * we leave the current one up unchanged. + */ + SCTPDBG(SCTP_DEBUG_TIMER2, + "Timer type %d already running: inp=%p, stcb=%p, net=%p.\n", + t_type, inp, stcb, net); + return; + } + /* At this point we can proceed. */ + if (t_type == SCTP_TIMER_TYPE_SEND) { + stcb->asoc.num_send_timers_up++; + } + tmr->stopped_from = 0; + tmr->type = t_type; + tmr->ep = (void *)inp; + tmr->tcb = (void *)stcb; + if (t_type == SCTP_TIMER_TYPE_STRRESET) { + tmr->net = NULL; + } else { + tmr->net = (void *)net; + } + tmr->self = (void *)tmr; +#if defined(__FreeBSD__) && !defined(__Userspace__) + tmr->vnet = (void *)curvnet; +#endif + tmr->ticks = sctp_get_tick_count(); + if (SCTP_OS_TIMER_START(&tmr->timer, to_ticks, sctp_timeout_handler, tmr) == 0) { + SCTPDBG(SCTP_DEBUG_TIMER2, + "Timer type %d started: ticks=%u, inp=%p, stcb=%p, net=%p.\n", + t_type, to_ticks, inp, stcb, net); + /* + * If this is a newly scheduled callout, as opposed to a + * rescheduled one, increment relevant reference counts. + */ + if (tmr->ep != NULL) { + SCTP_INP_INCR_REF(inp); + } + if (tmr->tcb != NULL) { + atomic_add_int(&stcb->asoc.refcnt, 1); + } + if (tmr->net != NULL) { + atomic_add_int(&net->ref_count, 1); + } + } else { + /* + * This should not happen, since we checked for pending + * above. + */ + SCTPDBG(SCTP_DEBUG_TIMER2, + "Timer type %d restarted: ticks=%u, inp=%p, stcb=%p, net=%p.\n", + t_type, to_ticks, inp, stcb, net); + } + return; +} + +/*- + * The following table shows which parameters must be provided + * when calling sctp_timer_stop(). For parameters not being + * provided, NULL must be used. + * + * |Name |inp |stcb|net | + * |-----------------------------|----|----|----| + * |SCTP_TIMER_TYPE_SEND |Yes |Yes |Yes | + * |SCTP_TIMER_TYPE_INIT |Yes |Yes |Yes | + * |SCTP_TIMER_TYPE_RECV |Yes |Yes |No | + * |SCTP_TIMER_TYPE_SHUTDOWN |Yes |Yes |Yes | + * |SCTP_TIMER_TYPE_HEARTBEAT |Yes |Yes |Yes | + * |SCTP_TIMER_TYPE_COOKIE |Yes |Yes |Yes | + * |SCTP_TIMER_TYPE_NEWCOOKIE |Yes |No |No | + * |SCTP_TIMER_TYPE_PATHMTURAISE |Yes |Yes |Yes | + * |SCTP_TIMER_TYPE_SHUTDOWNACK |Yes |Yes |Yes | + * |SCTP_TIMER_TYPE_ASCONF |Yes |Yes |No | + * |SCTP_TIMER_TYPE_SHUTDOWNGUARD|Yes |Yes |No | + * |SCTP_TIMER_TYPE_AUTOCLOSE |Yes |Yes |No | + * |SCTP_TIMER_TYPE_STRRESET |Yes |Yes |No | + * |SCTP_TIMER_TYPE_INPKILL |Yes |No |No | + * |SCTP_TIMER_TYPE_ASOCKILL |Yes |Yes |No | + * |SCTP_TIMER_TYPE_ADDR_WQ |No |No |No | + * |SCTP_TIMER_TYPE_PRIM_DELETED |Yes |Yes |No | + * + */ + +void +sctp_timer_stop(int t_type, struct sctp_inpcb *inp, struct sctp_tcb *stcb, + struct sctp_nets *net, uint32_t from) +{ + struct sctp_timer *tmr; + + KASSERT(stcb == NULL || stcb->sctp_ep == inp, + ("sctp_timer_stop of type %d: inp = %p, stcb->sctp_ep %p", + t_type, stcb, stcb->sctp_ep)); + if (stcb != NULL) { + SCTP_TCB_LOCK_ASSERT(stcb); + } else if (inp != NULL) { + SCTP_INP_WLOCK_ASSERT(inp); + } else { + SCTP_WQ_ADDR_LOCK_ASSERT(); + } + tmr = NULL; + switch (t_type) { + case SCTP_TIMER_TYPE_SEND: + if ((inp == NULL) || (stcb == NULL) || (net == NULL)) { +#ifdef INVARIANTS + panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p", + t_type, inp, stcb, net); +#else + return; +#endif + } + tmr = &net->rxt_timer; + break; + case SCTP_TIMER_TYPE_INIT: + if ((inp == NULL) || (stcb == NULL) || (net == NULL)) { +#ifdef INVARIANTS + panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p", + t_type, inp, stcb, net); +#else + return; +#endif + } + tmr = &net->rxt_timer; + break; + case SCTP_TIMER_TYPE_RECV: + if ((inp == NULL) || (stcb == NULL) || (net != NULL)) { +#ifdef INVARIANTS + panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p", + t_type, inp, stcb, net); +#else + return; +#endif + } + tmr = &stcb->asoc.dack_timer; + break; + case SCTP_TIMER_TYPE_SHUTDOWN: + if ((inp == NULL) || (stcb == NULL) || (net == NULL)) { +#ifdef INVARIANTS + panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p", + t_type, inp, stcb, net); +#else + return; +#endif + } + tmr = &net->rxt_timer; + break; + case SCTP_TIMER_TYPE_HEARTBEAT: + if ((inp == NULL) || (stcb == NULL) || (net == NULL)) { +#ifdef INVARIANTS + panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p", + t_type, inp, stcb, net); +#else + return; +#endif + } + tmr = &net->hb_timer; + break; + case SCTP_TIMER_TYPE_COOKIE: + if ((inp == NULL) || (stcb == NULL) || (net == NULL)) { +#ifdef INVARIANTS + panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p", + t_type, inp, stcb, net); +#else + return; +#endif + } + tmr = &net->rxt_timer; + break; + case SCTP_TIMER_TYPE_NEWCOOKIE: + if ((inp == NULL) || (stcb != NULL) || (net != NULL)) { +#ifdef INVARIANTS + panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p", + t_type, inp, stcb, net); +#else + return; +#endif + } + tmr = &inp->sctp_ep.signature_change; + break; + case SCTP_TIMER_TYPE_PATHMTURAISE: + if ((inp == NULL) || (stcb == NULL) || (net == NULL)) { +#ifdef INVARIANTS + panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p", + t_type, inp, stcb, net); +#else + return; +#endif + } + tmr = &net->pmtu_timer; + break; + case SCTP_TIMER_TYPE_SHUTDOWNACK: + if ((inp == NULL) || (stcb == NULL) || (net == NULL)) { +#ifdef INVARIANTS + panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p", + t_type, inp, stcb, net); +#else + return; +#endif + } + tmr = &net->rxt_timer; + break; + case SCTP_TIMER_TYPE_ASCONF: + if ((inp == NULL) || (stcb == NULL) || (net != NULL)) { +#ifdef INVARIANTS + panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p", + t_type, inp, stcb, net); +#else + return; +#endif + } + tmr = &stcb->asoc.asconf_timer; + break; + case SCTP_TIMER_TYPE_SHUTDOWNGUARD: + if ((inp == NULL) || (stcb == NULL) || (net != NULL)) { +#ifdef INVARIANTS + panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p", + t_type, inp, stcb, net); +#else + return; +#endif + } + tmr = &stcb->asoc.shut_guard_timer; + break; + case SCTP_TIMER_TYPE_AUTOCLOSE: + if ((inp == NULL) || (stcb == NULL) || (net != NULL)) { +#ifdef INVARIANTS + panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p", + t_type, inp, stcb, net); +#else + return; +#endif + } + tmr = &stcb->asoc.autoclose_timer; + break; + case SCTP_TIMER_TYPE_STRRESET: + if ((inp == NULL) || (stcb == NULL) || (net != NULL)) { +#ifdef INVARIANTS + panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p", + t_type, inp, stcb, net); +#else + return; +#endif + } + tmr = &stcb->asoc.strreset_timer; + break; + case SCTP_TIMER_TYPE_INPKILL: + /* + * The inp is setup to die. We re-use the signature_change + * timer since that has stopped and we are in the GONE + * state. + */ + if ((inp == NULL) || (stcb != NULL) || (net != NULL)) { +#ifdef INVARIANTS + panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p", + t_type, inp, stcb, net); +#else + return; +#endif + } + tmr = &inp->sctp_ep.signature_change; + break; + case SCTP_TIMER_TYPE_ASOCKILL: + if ((inp == NULL) || (stcb == NULL) || (net != NULL)) { +#ifdef INVARIANTS + panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p", + t_type, inp, stcb, net); +#else + return; +#endif + } + tmr = &stcb->asoc.strreset_timer; + break; + case SCTP_TIMER_TYPE_ADDR_WQ: + if ((inp != NULL) || (stcb != NULL) || (net != NULL)) { +#ifdef INVARIANTS + panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p", + t_type, inp, stcb, net); +#else + return; +#endif + } + tmr = &SCTP_BASE_INFO(addr_wq_timer); + break; + case SCTP_TIMER_TYPE_PRIM_DELETED: + if ((inp == NULL) || (stcb == NULL) || (net != NULL)) { +#ifdef INVARIANTS + panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p", + t_type, inp, stcb, net); +#else + return; +#endif + } + tmr = &stcb->asoc.delete_prim_timer; + break; + default: +#ifdef INVARIANTS + panic("Unknown timer type %d", t_type); +#else + return; +#endif + } + KASSERT(tmr != NULL, ("tmr is NULL for timer type %d", t_type)); + if ((tmr->type != SCTP_TIMER_TYPE_NONE) && + (tmr->type != t_type)) { + /* + * Ok we have a timer that is under joint use. Cookie timer + * per chance with the SEND timer. We therefore are NOT + * running the timer that the caller wants stopped. So just + * return. + */ + SCTPDBG(SCTP_DEBUG_TIMER2, + "Shared timer type %d not running: inp=%p, stcb=%p, net=%p.\n", + t_type, inp, stcb, net); + return; + } + if ((t_type == SCTP_TIMER_TYPE_SEND) && (stcb != NULL)) { + stcb->asoc.num_send_timers_up--; + if (stcb->asoc.num_send_timers_up < 0) { + stcb->asoc.num_send_timers_up = 0; + } + } + tmr->self = NULL; + tmr->stopped_from = from; + if (SCTP_OS_TIMER_STOP(&tmr->timer) == 1) { + KASSERT(tmr->ep == inp, + ("sctp_timer_stop of type %d: inp = %p, tmr->inp = %p", + t_type, inp, tmr->ep)); + KASSERT(tmr->tcb == stcb, + ("sctp_timer_stop of type %d: stcb = %p, tmr->stcb = %p", + t_type, stcb, tmr->tcb)); + KASSERT(((t_type == SCTP_TIMER_TYPE_ASCONF) && (tmr->net != NULL)) || + ((t_type != SCTP_TIMER_TYPE_ASCONF) && (tmr->net == net)), + ("sctp_timer_stop of type %d: net = %p, tmr->net = %p", + t_type, net, tmr->net)); + SCTPDBG(SCTP_DEBUG_TIMER2, + "Timer type %d stopped: inp=%p, stcb=%p, net=%p.\n", + t_type, inp, stcb, net); + /* + * If the timer was actually stopped, decrement reference counts + * that were incremented in sctp_timer_start(). + */ + if (tmr->ep != NULL) { + tmr->ep = NULL; + SCTP_INP_DECR_REF(inp); + } + if (tmr->tcb != NULL) { + tmr->tcb = NULL; + atomic_subtract_int(&stcb->asoc.refcnt, 1); + } + if (tmr->net != NULL) { + struct sctp_nets *tmr_net; + + /* + * Can't use net, since it doesn't work for + * SCTP_TIMER_TYPE_ASCONF. + */ + tmr_net = tmr->net; + tmr->net = NULL; + sctp_free_remote_addr(tmr_net); + } + } else { + SCTPDBG(SCTP_DEBUG_TIMER2, + "Timer type %d not stopped: inp=%p, stcb=%p, net=%p.\n", + t_type, inp, stcb, net); + } + return; +} + +uint32_t +sctp_calculate_len(struct mbuf *m) +{ + struct mbuf *at; + uint32_t tlen; + + tlen = 0; + for (at = m; at != NULL; at = SCTP_BUF_NEXT(at)) { + tlen += SCTP_BUF_LEN(at); + } + return (tlen); +} + +/* + * Given an association and starting time of the current RTT period, update + * RTO in number of msecs. net should point to the current network. + * Return 1, if an RTO update was performed, return 0 if no update was + * performed due to invalid starting point. + */ + +int +sctp_calculate_rto(struct sctp_tcb *stcb, + struct sctp_association *asoc, + struct sctp_nets *net, + struct timeval *old, + int rtt_from_sack) +{ + struct timeval now; + uint64_t rtt_us; /* RTT in us */ + int32_t rtt; /* RTT in ms */ + uint32_t new_rto; + int first_measure = 0; + + /************************/ + /* 1. calculate new RTT */ + /************************/ + /* get the current time */ + if (stcb->asoc.use_precise_time) { + (void)SCTP_GETPTIME_TIMEVAL(&now); + } else { + (void)SCTP_GETTIME_TIMEVAL(&now); + } + if ((old->tv_sec > now.tv_sec) || + ((old->tv_sec == now.tv_sec) && (old->tv_usec > now.tv_usec))) { + /* The starting point is in the future. */ + return (0); + } + timevalsub(&now, old); + rtt_us = (uint64_t)1000000 * (uint64_t)now.tv_sec + (uint64_t)now.tv_usec; + if (rtt_us > SCTP_RTO_UPPER_BOUND * 1000) { + /* The RTT is larger than a sane value. */ + return (0); + } + /* store the current RTT in us */ + net->rtt = rtt_us; + /* compute rtt in ms */ + rtt = (int32_t)(net->rtt / 1000); + if ((asoc->cc_functions.sctp_rtt_calculated) && (rtt_from_sack == SCTP_RTT_FROM_DATA)) { + /* Tell the CC module that a new update has just occurred from a sack */ + (*asoc->cc_functions.sctp_rtt_calculated)(stcb, net, &now); + } + /* Do we need to determine the lan? We do this only + * on sacks i.e. RTT being determined from data not + * non-data (HB/INIT->INITACK). + */ + if ((rtt_from_sack == SCTP_RTT_FROM_DATA) && + (net->lan_type == SCTP_LAN_UNKNOWN)) { + if (net->rtt > SCTP_LOCAL_LAN_RTT) { + net->lan_type = SCTP_LAN_INTERNET; + } else { + net->lan_type = SCTP_LAN_LOCAL; + } + } + + /***************************/ + /* 2. update RTTVAR & SRTT */ + /***************************/ + /*- + * Compute the scaled average lastsa and the + * scaled variance lastsv as described in van Jacobson + * Paper "Congestion Avoidance and Control", Annex A. + * + * (net->lastsa >> SCTP_RTT_SHIFT) is the srtt + * (net->lastsv >> SCTP_RTT_VAR_SHIFT) is the rttvar + */ + if (net->RTO_measured) { + rtt -= (net->lastsa >> SCTP_RTT_SHIFT); + net->lastsa += rtt; + if (rtt < 0) { + rtt = -rtt; + } + rtt -= (net->lastsv >> SCTP_RTT_VAR_SHIFT); + net->lastsv += rtt; + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_RTTVAR_LOGGING_ENABLE) { + rto_logging(net, SCTP_LOG_RTTVAR); + } + } else { + /* First RTO measurement */ + net->RTO_measured = 1; + first_measure = 1; + net->lastsa = rtt << SCTP_RTT_SHIFT; + net->lastsv = (rtt / 2) << SCTP_RTT_VAR_SHIFT; + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_RTTVAR_LOGGING_ENABLE) { + rto_logging(net, SCTP_LOG_INITIAL_RTT); + } + } + if (net->lastsv == 0) { + net->lastsv = SCTP_CLOCK_GRANULARITY; + } + new_rto = (net->lastsa >> SCTP_RTT_SHIFT) + net->lastsv; + if ((new_rto > SCTP_SAT_NETWORK_MIN) && + (stcb->asoc.sat_network_lockout == 0)) { + stcb->asoc.sat_network = 1; + } else if ((!first_measure) && stcb->asoc.sat_network) { + stcb->asoc.sat_network = 0; + stcb->asoc.sat_network_lockout = 1; + } + /* bound it, per C6/C7 in Section 5.3.1 */ + if (new_rto < stcb->asoc.minrto) { + new_rto = stcb->asoc.minrto; + } + if (new_rto > stcb->asoc.maxrto) { + new_rto = stcb->asoc.maxrto; + } + net->RTO = new_rto; + return (1); +} + +/* + * return a pointer to a contiguous piece of data from the given mbuf chain + * starting at 'off' for 'len' bytes. If the desired piece spans more than + * one mbuf, a copy is made at 'ptr'. caller must ensure that the buffer size + * is >= 'len' returns NULL if there there isn't 'len' bytes in the chain. + */ +caddr_t +sctp_m_getptr(struct mbuf *m, int off, int len, uint8_t * in_ptr) +{ + uint32_t count; + uint8_t *ptr; + + ptr = in_ptr; + if ((off < 0) || (len <= 0)) + return (NULL); + + /* find the desired start location */ + while ((m != NULL) && (off > 0)) { + if (off < SCTP_BUF_LEN(m)) + break; + off -= SCTP_BUF_LEN(m); + m = SCTP_BUF_NEXT(m); + } + if (m == NULL) + return (NULL); + + /* is the current mbuf large enough (eg. contiguous)? */ + if ((SCTP_BUF_LEN(m) - off) >= len) { + return (mtod(m, caddr_t) + off); + } else { + /* else, it spans more than one mbuf, so save a temp copy... */ + while ((m != NULL) && (len > 0)) { + count = min(SCTP_BUF_LEN(m) - off, len); + memcpy(ptr, mtod(m, caddr_t) + off, count); + len -= count; + ptr += count; + off = 0; + m = SCTP_BUF_NEXT(m); + } + if ((m == NULL) && (len > 0)) + return (NULL); + else + return ((caddr_t)in_ptr); + } +} + +struct sctp_paramhdr * +sctp_get_next_param(struct mbuf *m, + int offset, + struct sctp_paramhdr *pull, + int pull_limit) +{ + /* This just provides a typed signature to Peter's Pull routine */ + return ((struct sctp_paramhdr *)sctp_m_getptr(m, offset, pull_limit, + (uint8_t *) pull)); +} + +struct mbuf * +sctp_add_pad_tombuf(struct mbuf *m, int padlen) +{ + struct mbuf *m_last; + caddr_t dp; + + if (padlen > 3) { + return (NULL); + } + if (padlen <= M_TRAILINGSPACE(m)) { + /* + * The easy way. We hope the majority of the time we hit + * here :) + */ + m_last = m; + } else { + /* Hard way we must grow the mbuf chain */ + m_last = sctp_get_mbuf_for_msg(padlen, 0, M_NOWAIT, 1, MT_DATA); + if (m_last == NULL) { + return (NULL); + } + SCTP_BUF_LEN(m_last) = 0; + SCTP_BUF_NEXT(m_last) = NULL; + SCTP_BUF_NEXT(m) = m_last; + } + dp = mtod(m_last, caddr_t) + SCTP_BUF_LEN(m_last); + SCTP_BUF_LEN(m_last) += padlen; + memset(dp, 0, padlen); + return (m_last); +} + +struct mbuf * +sctp_pad_lastmbuf(struct mbuf *m, int padval, struct mbuf *last_mbuf) +{ + /* find the last mbuf in chain and pad it */ + struct mbuf *m_at; + + if (last_mbuf != NULL) { + return (sctp_add_pad_tombuf(last_mbuf, padval)); + } else { + for (m_at = m; m_at; m_at = SCTP_BUF_NEXT(m_at)) { + if (SCTP_BUF_NEXT(m_at) == NULL) { + return (sctp_add_pad_tombuf(m_at, padval)); + } + } + } + return (NULL); +} + +static void +sctp_notify_assoc_change(uint16_t state, struct sctp_tcb *stcb, + uint16_t error, struct sctp_abort_chunk *abort, + bool from_peer, bool timedout, int so_locked) +{ + struct mbuf *m_notify; + struct sctp_assoc_change *sac; + struct sctp_queued_to_read *control; + unsigned int notif_len; + uint16_t abort_len; + unsigned int i; +#if defined(__APPLE__) && !defined(__Userspace__) + struct socket *so; +#endif + + KASSERT(abort == NULL || from_peer, + ("sctp_notify_assoc_change: ABORT chunk provided for local termination")); + KASSERT(!from_peer || !timedout, + ("sctp_notify_assoc_change: timeouts can only be local")); + if (stcb == NULL) { + return; + } + if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVASSOCEVNT)) { + notif_len = (unsigned int)sizeof(struct sctp_assoc_change); + if (abort != NULL) { + abort_len = ntohs(abort->ch.chunk_length); + /* + * Only SCTP_CHUNK_BUFFER_SIZE are guaranteed to be + * contiguous. + */ + if (abort_len > SCTP_CHUNK_BUFFER_SIZE) { + abort_len = SCTP_CHUNK_BUFFER_SIZE; + } + } else { + abort_len = 0; + } + if ((state == SCTP_COMM_UP) || (state == SCTP_RESTART)) { + notif_len += SCTP_ASSOC_SUPPORTS_MAX; + } else if ((state == SCTP_COMM_LOST) || (state == SCTP_CANT_STR_ASSOC)) { + notif_len += abort_len; + } + m_notify = sctp_get_mbuf_for_msg(notif_len, 0, M_NOWAIT, 1, MT_DATA); + if (m_notify == NULL) { + /* Retry with smaller value. */ + notif_len = (unsigned int)sizeof(struct sctp_assoc_change); + m_notify = sctp_get_mbuf_for_msg(notif_len, 0, M_NOWAIT, 1, MT_DATA); + if (m_notify == NULL) { + goto set_error; + } + } + SCTP_BUF_NEXT(m_notify) = NULL; + sac = mtod(m_notify, struct sctp_assoc_change *); + memset(sac, 0, notif_len); + sac->sac_type = SCTP_ASSOC_CHANGE; + sac->sac_flags = 0; + sac->sac_length = sizeof(struct sctp_assoc_change); + sac->sac_state = state; + sac->sac_error = error; + if (state == SCTP_CANT_STR_ASSOC) { + sac->sac_outbound_streams = 0; + sac->sac_inbound_streams = 0; + } else { + sac->sac_outbound_streams = stcb->asoc.streamoutcnt; + sac->sac_inbound_streams = stcb->asoc.streamincnt; + } + sac->sac_assoc_id = sctp_get_associd(stcb); + if (notif_len > sizeof(struct sctp_assoc_change)) { + if ((state == SCTP_COMM_UP) || (state == SCTP_RESTART)) { + i = 0; + if (stcb->asoc.prsctp_supported == 1) { + sac->sac_info[i++] = SCTP_ASSOC_SUPPORTS_PR; + } + if (stcb->asoc.auth_supported == 1) { + sac->sac_info[i++] = SCTP_ASSOC_SUPPORTS_AUTH; + } + if (stcb->asoc.asconf_supported == 1) { + sac->sac_info[i++] = SCTP_ASSOC_SUPPORTS_ASCONF; + } + if (stcb->asoc.idata_supported == 1) { + sac->sac_info[i++] = SCTP_ASSOC_SUPPORTS_INTERLEAVING; + } + sac->sac_info[i++] = SCTP_ASSOC_SUPPORTS_MULTIBUF; + if (stcb->asoc.reconfig_supported == 1) { + sac->sac_info[i++] = SCTP_ASSOC_SUPPORTS_RE_CONFIG; + } + sac->sac_length += i; + } else if ((state == SCTP_COMM_LOST) || (state == SCTP_CANT_STR_ASSOC)) { + memcpy(sac->sac_info, abort, abort_len); + sac->sac_length += abort_len; + } + } + SCTP_BUF_LEN(m_notify) = sac->sac_length; + control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination, + 0, 0, stcb->asoc.context, 0, 0, 0, + m_notify); + if (control != NULL) { + control->length = SCTP_BUF_LEN(m_notify); + control->spec_flags = M_NOTIFICATION; + /* not that we need this */ + control->tail_mbuf = m_notify; + sctp_add_to_readq(stcb->sctp_ep, stcb, + control, + &stcb->sctp_socket->so_rcv, 1, SCTP_READ_LOCK_NOT_HELD, + so_locked); + } else { + sctp_m_freem(m_notify); + } + } + /* + * For 1-to-1 style sockets, we send up and error when an ABORT + * comes in. + */ +set_error: + if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || + (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) && + ((state == SCTP_COMM_LOST) || (state == SCTP_CANT_STR_ASSOC))) { + SOCK_LOCK(stcb->sctp_socket); + if (from_peer) { + if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) { + SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, ECONNREFUSED); + stcb->sctp_socket->so_error = ECONNREFUSED; + } else { + SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, ECONNRESET); + stcb->sctp_socket->so_error = ECONNRESET; + } + } else { + if (timedout) { + SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, ETIMEDOUT); + stcb->sctp_socket->so_error = ETIMEDOUT; + } else { + SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, ECONNABORTED); + stcb->sctp_socket->so_error = ECONNABORTED; + } + } + SOCK_UNLOCK(stcb->sctp_socket); + } + /* Wake ANY sleepers */ +#if defined(__APPLE__) && !defined(__Userspace__) + so = SCTP_INP_SO(stcb->sctp_ep); + if (!so_locked) { + atomic_add_int(&stcb->asoc.refcnt, 1); + SCTP_TCB_UNLOCK(stcb); + SCTP_SOCKET_LOCK(so, 1); + SCTP_TCB_LOCK(stcb); + atomic_subtract_int(&stcb->asoc.refcnt, 1); + if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) { + SCTP_SOCKET_UNLOCK(so, 1); + return; + } + } +#endif + if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || + (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) && + ((state == SCTP_COMM_LOST) || (state == SCTP_CANT_STR_ASSOC))) { + socantrcvmore(stcb->sctp_socket); + } + sorwakeup(stcb->sctp_socket); + sowwakeup(stcb->sctp_socket); +#if defined(__APPLE__) && !defined(__Userspace__) + if (!so_locked) { + SCTP_SOCKET_UNLOCK(so, 1); + } +#endif +} + +static void +sctp_notify_peer_addr_change(struct sctp_tcb *stcb, uint32_t state, + struct sockaddr *sa, uint32_t error, int so_locked) +{ + struct mbuf *m_notify; + struct sctp_paddr_change *spc; + struct sctp_queued_to_read *control; + + if ((stcb == NULL) || + sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVPADDREVNT)) { + /* event not enabled */ + return; + } + m_notify = sctp_get_mbuf_for_msg(sizeof(struct sctp_paddr_change), 0, M_NOWAIT, 1, MT_DATA); + if (m_notify == NULL) + return; + SCTP_BUF_LEN(m_notify) = 0; + spc = mtod(m_notify, struct sctp_paddr_change *); + memset(spc, 0, sizeof(struct sctp_paddr_change)); + spc->spc_type = SCTP_PEER_ADDR_CHANGE; + spc->spc_flags = 0; + spc->spc_length = sizeof(struct sctp_paddr_change); + switch (sa->sa_family) { +#ifdef INET + case AF_INET: +#ifdef INET6 + if (sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_NEEDS_MAPPED_V4)) { + in6_sin_2_v4mapsin6((struct sockaddr_in *)sa, + (struct sockaddr_in6 *)&spc->spc_aaddr); + } else { + memcpy(&spc->spc_aaddr, sa, sizeof(struct sockaddr_in)); + } +#else + memcpy(&spc->spc_aaddr, sa, sizeof(struct sockaddr_in)); +#endif + break; +#endif +#ifdef INET6 + case AF_INET6: + { +#ifdef SCTP_EMBEDDED_V6_SCOPE + struct sockaddr_in6 *sin6; +#endif /* SCTP_EMBEDDED_V6_SCOPE */ + memcpy(&spc->spc_aaddr, sa, sizeof(struct sockaddr_in6)); + +#ifdef SCTP_EMBEDDED_V6_SCOPE + sin6 = (struct sockaddr_in6 *)&spc->spc_aaddr; + if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) { + if (sin6->sin6_scope_id == 0) { + /* recover scope_id for user */ +#ifdef SCTP_KAME + (void)sa6_recoverscope(sin6); +#else + (void)in6_recoverscope(sin6, &sin6->sin6_addr, + NULL); +#endif + } else { + /* clear embedded scope_id for user */ + in6_clearscope(&sin6->sin6_addr); + } + } +#endif /* SCTP_EMBEDDED_V6_SCOPE */ + break; + } +#endif +#if defined(__Userspace__) + case AF_CONN: + memcpy(&spc->spc_aaddr, sa, sizeof(struct sockaddr_conn)); + break; +#endif + default: + /* TSNH */ + break; + } + spc->spc_state = state; + spc->spc_error = error; + spc->spc_assoc_id = sctp_get_associd(stcb); + + SCTP_BUF_LEN(m_notify) = sizeof(struct sctp_paddr_change); + SCTP_BUF_NEXT(m_notify) = NULL; + + /* append to socket */ + control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination, + 0, 0, stcb->asoc.context, 0, 0, 0, + m_notify); + if (control == NULL) { + /* no memory */ + sctp_m_freem(m_notify); + return; + } + control->length = SCTP_BUF_LEN(m_notify); + control->spec_flags = M_NOTIFICATION; + /* not that we need this */ + control->tail_mbuf = m_notify; + sctp_add_to_readq(stcb->sctp_ep, stcb, + control, + &stcb->sctp_socket->so_rcv, 1, + SCTP_READ_LOCK_NOT_HELD, + so_locked); +} + +static void +sctp_notify_send_failed(struct sctp_tcb *stcb, uint8_t sent, uint32_t error, + struct sctp_tmit_chunk *chk, int so_locked) +{ + struct mbuf *m_notify; + struct sctp_send_failed *ssf; + struct sctp_send_failed_event *ssfe; + struct sctp_queued_to_read *control; + struct sctp_chunkhdr *chkhdr; + int notifhdr_len, chk_len, chkhdr_len, padding_len, payload_len; + + if ((stcb == NULL) || + (sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVSENDFAILEVNT) && + sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVNSENDFAILEVNT))) { + /* event not enabled */ + return; + } + + if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVNSENDFAILEVNT)) { + notifhdr_len = sizeof(struct sctp_send_failed_event); + } else { + notifhdr_len = sizeof(struct sctp_send_failed); + } + m_notify = sctp_get_mbuf_for_msg(notifhdr_len, 0, M_NOWAIT, 1, MT_DATA); + if (m_notify == NULL) + /* no space left */ + return; + SCTP_BUF_LEN(m_notify) = notifhdr_len; + if (stcb->asoc.idata_supported) { + chkhdr_len = sizeof(struct sctp_idata_chunk); + } else { + chkhdr_len = sizeof(struct sctp_data_chunk); + } + /* Use some defaults in case we can't access the chunk header */ + if (chk->send_size >= chkhdr_len) { + payload_len = chk->send_size - chkhdr_len; + } else { + payload_len = 0; + } + padding_len = 0; + if (chk->data != NULL) { + chkhdr = mtod(chk->data, struct sctp_chunkhdr *); + if (chkhdr != NULL) { + chk_len = ntohs(chkhdr->chunk_length); + if ((chk_len >= chkhdr_len) && + (chk->send_size >= chk_len) && + (chk->send_size - chk_len < 4)) { + padding_len = chk->send_size - chk_len; + payload_len = chk->send_size - chkhdr_len - padding_len; + } + } + } + if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVNSENDFAILEVNT)) { + ssfe = mtod(m_notify, struct sctp_send_failed_event *); + memset(ssfe, 0, notifhdr_len); + ssfe->ssfe_type = SCTP_SEND_FAILED_EVENT; + if (sent) { + ssfe->ssfe_flags = SCTP_DATA_SENT; + } else { + ssfe->ssfe_flags = SCTP_DATA_UNSENT; + } + ssfe->ssfe_length = (uint32_t)(notifhdr_len + payload_len); + ssfe->ssfe_error = error; + /* not exactly what the user sent in, but should be close :) */ + ssfe->ssfe_info.snd_sid = chk->rec.data.sid; + ssfe->ssfe_info.snd_flags = chk->rec.data.rcv_flags; + ssfe->ssfe_info.snd_ppid = chk->rec.data.ppid; + ssfe->ssfe_info.snd_context = chk->rec.data.context; + ssfe->ssfe_info.snd_assoc_id = sctp_get_associd(stcb); + ssfe->ssfe_assoc_id = sctp_get_associd(stcb); + } else { + ssf = mtod(m_notify, struct sctp_send_failed *); + memset(ssf, 0, notifhdr_len); + ssf->ssf_type = SCTP_SEND_FAILED; + if (sent) { + ssf->ssf_flags = SCTP_DATA_SENT; + } else { + ssf->ssf_flags = SCTP_DATA_UNSENT; + } + ssf->ssf_length = (uint32_t)(notifhdr_len + payload_len); + ssf->ssf_error = error; + /* not exactly what the user sent in, but should be close :) */ + ssf->ssf_info.sinfo_stream = chk->rec.data.sid; + ssf->ssf_info.sinfo_ssn = (uint16_t)chk->rec.data.mid; + ssf->ssf_info.sinfo_flags = chk->rec.data.rcv_flags; + ssf->ssf_info.sinfo_ppid = chk->rec.data.ppid; + ssf->ssf_info.sinfo_context = chk->rec.data.context; + ssf->ssf_info.sinfo_assoc_id = sctp_get_associd(stcb); + ssf->ssf_assoc_id = sctp_get_associd(stcb); + } + if (chk->data != NULL) { + /* Trim off the sctp chunk header (it should be there) */ + if (chk->send_size == chkhdr_len + payload_len + padding_len) { + m_adj(chk->data, chkhdr_len); + m_adj(chk->data, -padding_len); + sctp_mbuf_crush(chk->data); + chk->send_size -= (chkhdr_len + padding_len); + } + } + SCTP_BUF_NEXT(m_notify) = chk->data; + /* Steal off the mbuf */ + chk->data = NULL; + /* + * For this case, we check the actual socket buffer, since the assoc + * is going away we don't want to overfill the socket buffer for a + * non-reader + */ + if (sctp_sbspace_failedmsgs(&stcb->sctp_socket->so_rcv) < SCTP_BUF_LEN(m_notify)) { + sctp_m_freem(m_notify); + return; + } + /* append to socket */ + control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination, + 0, 0, stcb->asoc.context, 0, 0, 0, + m_notify); + if (control == NULL) { + /* no memory */ + sctp_m_freem(m_notify); + return; + } + control->length = SCTP_BUF_LEN(m_notify); + control->spec_flags = M_NOTIFICATION; + /* not that we need this */ + control->tail_mbuf = m_notify; + sctp_add_to_readq(stcb->sctp_ep, stcb, + control, + &stcb->sctp_socket->so_rcv, 1, + SCTP_READ_LOCK_NOT_HELD, + so_locked); +} + +static void +sctp_notify_send_failed2(struct sctp_tcb *stcb, uint32_t error, + struct sctp_stream_queue_pending *sp, int so_locked) +{ + struct mbuf *m_notify; + struct sctp_send_failed *ssf; + struct sctp_send_failed_event *ssfe; + struct sctp_queued_to_read *control; + int notifhdr_len; + + if ((stcb == NULL) || + (sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVSENDFAILEVNT) && + sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVNSENDFAILEVNT))) { + /* event not enabled */ + return; + } + if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVNSENDFAILEVNT)) { + notifhdr_len = sizeof(struct sctp_send_failed_event); + } else { + notifhdr_len = sizeof(struct sctp_send_failed); + } + m_notify = sctp_get_mbuf_for_msg(notifhdr_len, 0, M_NOWAIT, 1, MT_DATA); + if (m_notify == NULL) { + /* no space left */ + return; + } + SCTP_BUF_LEN(m_notify) = notifhdr_len; + if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVNSENDFAILEVNT)) { + ssfe = mtod(m_notify, struct sctp_send_failed_event *); + memset(ssfe, 0, notifhdr_len); + ssfe->ssfe_type = SCTP_SEND_FAILED_EVENT; + ssfe->ssfe_flags = SCTP_DATA_UNSENT; + ssfe->ssfe_length = (uint32_t)(notifhdr_len + sp->length); + ssfe->ssfe_error = error; + /* not exactly what the user sent in, but should be close :) */ + ssfe->ssfe_info.snd_sid = sp->sid; + if (sp->some_taken) { + ssfe->ssfe_info.snd_flags = SCTP_DATA_LAST_FRAG; + } else { + ssfe->ssfe_info.snd_flags = SCTP_DATA_NOT_FRAG; + } + ssfe->ssfe_info.snd_ppid = sp->ppid; + ssfe->ssfe_info.snd_context = sp->context; + ssfe->ssfe_info.snd_assoc_id = sctp_get_associd(stcb); + ssfe->ssfe_assoc_id = sctp_get_associd(stcb); + } else { + ssf = mtod(m_notify, struct sctp_send_failed *); + memset(ssf, 0, notifhdr_len); + ssf->ssf_type = SCTP_SEND_FAILED; + ssf->ssf_flags = SCTP_DATA_UNSENT; + ssf->ssf_length = (uint32_t)(notifhdr_len + sp->length); + ssf->ssf_error = error; + /* not exactly what the user sent in, but should be close :) */ + ssf->ssf_info.sinfo_stream = sp->sid; + ssf->ssf_info.sinfo_ssn = 0; + if (sp->some_taken) { + ssf->ssf_info.sinfo_flags = SCTP_DATA_LAST_FRAG; + } else { + ssf->ssf_info.sinfo_flags = SCTP_DATA_NOT_FRAG; + } + ssf->ssf_info.sinfo_ppid = sp->ppid; + ssf->ssf_info.sinfo_context = sp->context; + ssf->ssf_info.sinfo_assoc_id = sctp_get_associd(stcb); + ssf->ssf_assoc_id = sctp_get_associd(stcb); + } + SCTP_BUF_NEXT(m_notify) = sp->data; + + /* Steal off the mbuf */ + sp->data = NULL; + /* + * For this case, we check the actual socket buffer, since the assoc + * is going away we don't want to overfill the socket buffer for a + * non-reader + */ + if (sctp_sbspace_failedmsgs(&stcb->sctp_socket->so_rcv) < SCTP_BUF_LEN(m_notify)) { + sctp_m_freem(m_notify); + return; + } + /* append to socket */ + control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination, + 0, 0, stcb->asoc.context, 0, 0, 0, + m_notify); + if (control == NULL) { + /* no memory */ + sctp_m_freem(m_notify); + return; + } + control->length = SCTP_BUF_LEN(m_notify); + control->spec_flags = M_NOTIFICATION; + /* not that we need this */ + control->tail_mbuf = m_notify; + sctp_add_to_readq(stcb->sctp_ep, stcb, + control, + &stcb->sctp_socket->so_rcv, 1, SCTP_READ_LOCK_NOT_HELD, so_locked); +} + +static void +sctp_notify_adaptation_layer(struct sctp_tcb *stcb) +{ + struct mbuf *m_notify; + struct sctp_adaptation_event *sai; + struct sctp_queued_to_read *control; + + if ((stcb == NULL) || + sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_ADAPTATIONEVNT)) { + /* event not enabled */ + return; + } + + m_notify = sctp_get_mbuf_for_msg(sizeof(struct sctp_adaption_event), 0, M_NOWAIT, 1, MT_DATA); + if (m_notify == NULL) + /* no space left */ + return; + SCTP_BUF_LEN(m_notify) = 0; + sai = mtod(m_notify, struct sctp_adaptation_event *); + memset(sai, 0, sizeof(struct sctp_adaptation_event)); + sai->sai_type = SCTP_ADAPTATION_INDICATION; + sai->sai_flags = 0; + sai->sai_length = sizeof(struct sctp_adaptation_event); + sai->sai_adaptation_ind = stcb->asoc.peers_adaptation; + sai->sai_assoc_id = sctp_get_associd(stcb); + + SCTP_BUF_LEN(m_notify) = sizeof(struct sctp_adaptation_event); + SCTP_BUF_NEXT(m_notify) = NULL; + + /* append to socket */ + control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination, + 0, 0, stcb->asoc.context, 0, 0, 0, + m_notify); + if (control == NULL) { + /* no memory */ + sctp_m_freem(m_notify); + return; + } + control->length = SCTP_BUF_LEN(m_notify); + control->spec_flags = M_NOTIFICATION; + /* not that we need this */ + control->tail_mbuf = m_notify; + sctp_add_to_readq(stcb->sctp_ep, stcb, + control, + &stcb->sctp_socket->so_rcv, 1, SCTP_READ_LOCK_NOT_HELD, SCTP_SO_NOT_LOCKED); +} + +/* This always must be called with the read-queue LOCKED in the INP */ +static void +sctp_notify_partial_delivery_indication(struct sctp_tcb *stcb, uint32_t error, + uint32_t val, int so_locked) +{ + struct mbuf *m_notify; + struct sctp_pdapi_event *pdapi; + struct sctp_queued_to_read *control; + struct sockbuf *sb; + + if ((stcb == NULL) || + sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_PDAPIEVNT)) { + /* event not enabled */ + return; + } + if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_CANT_READ) { + return; + } + + m_notify = sctp_get_mbuf_for_msg(sizeof(struct sctp_pdapi_event), 0, M_NOWAIT, 1, MT_DATA); + if (m_notify == NULL) + /* no space left */ + return; + SCTP_BUF_LEN(m_notify) = 0; + pdapi = mtod(m_notify, struct sctp_pdapi_event *); + memset(pdapi, 0, sizeof(struct sctp_pdapi_event)); + pdapi->pdapi_type = SCTP_PARTIAL_DELIVERY_EVENT; + pdapi->pdapi_flags = 0; + pdapi->pdapi_length = sizeof(struct sctp_pdapi_event); + pdapi->pdapi_indication = error; + pdapi->pdapi_stream = (val >> 16); + pdapi->pdapi_seq = (val & 0x0000ffff); + pdapi->pdapi_assoc_id = sctp_get_associd(stcb); + + SCTP_BUF_LEN(m_notify) = sizeof(struct sctp_pdapi_event); + SCTP_BUF_NEXT(m_notify) = NULL; + control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination, + 0, 0, stcb->asoc.context, 0, 0, 0, + m_notify); + if (control == NULL) { + /* no memory */ + sctp_m_freem(m_notify); + return; + } + control->length = SCTP_BUF_LEN(m_notify); + control->spec_flags = M_NOTIFICATION; + /* not that we need this */ + control->tail_mbuf = m_notify; + sb = &stcb->sctp_socket->so_rcv; + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) { + sctp_sblog(sb, control->do_not_ref_stcb?NULL:stcb, SCTP_LOG_SBALLOC, SCTP_BUF_LEN(m_notify)); + } + sctp_sballoc(stcb, sb, m_notify); + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) { + sctp_sblog(sb, control->do_not_ref_stcb?NULL:stcb, SCTP_LOG_SBRESULT, 0); + } + control->end_added = 1; + if (stcb->asoc.control_pdapi) + TAILQ_INSERT_AFTER(&stcb->sctp_ep->read_queue, stcb->asoc.control_pdapi, control, next); + else { + /* we really should not see this case */ + TAILQ_INSERT_TAIL(&stcb->sctp_ep->read_queue, control, next); + } + if (stcb->sctp_ep && stcb->sctp_socket) { + /* This should always be the case */ +#if defined(__APPLE__) && !defined(__Userspace__) + struct socket *so; + + so = SCTP_INP_SO(stcb->sctp_ep); + if (!so_locked) { + atomic_add_int(&stcb->asoc.refcnt, 1); + SCTP_TCB_UNLOCK(stcb); + SCTP_SOCKET_LOCK(so, 1); + SCTP_TCB_LOCK(stcb); + atomic_subtract_int(&stcb->asoc.refcnt, 1); + if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { + SCTP_SOCKET_UNLOCK(so, 1); + return; + } + } +#endif + sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket); +#if defined(__APPLE__) && !defined(__Userspace__) + if (!so_locked) { + SCTP_SOCKET_UNLOCK(so, 1); + } +#endif + } +} + +static void +sctp_notify_shutdown_event(struct sctp_tcb *stcb) +{ + struct mbuf *m_notify; + struct sctp_shutdown_event *sse; + struct sctp_queued_to_read *control; + + /* + * For TCP model AND UDP connected sockets we will send an error up + * when an SHUTDOWN completes + */ + if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || + (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { + /* mark socket closed for read/write and wakeup! */ +#if defined(__APPLE__) && !defined(__Userspace__) + struct socket *so; + + so = SCTP_INP_SO(stcb->sctp_ep); + atomic_add_int(&stcb->asoc.refcnt, 1); + SCTP_TCB_UNLOCK(stcb); + SCTP_SOCKET_LOCK(so, 1); + SCTP_TCB_LOCK(stcb); + atomic_subtract_int(&stcb->asoc.refcnt, 1); + if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) { + SCTP_SOCKET_UNLOCK(so, 1); + return; + } +#endif + socantsendmore(stcb->sctp_socket); +#if defined(__APPLE__) && !defined(__Userspace__) + SCTP_SOCKET_UNLOCK(so, 1); +#endif + } + if (sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVSHUTDOWNEVNT)) { + /* event not enabled */ + return; + } + + m_notify = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_event), 0, M_NOWAIT, 1, MT_DATA); + if (m_notify == NULL) + /* no space left */ + return; + sse = mtod(m_notify, struct sctp_shutdown_event *); + memset(sse, 0, sizeof(struct sctp_shutdown_event)); + sse->sse_type = SCTP_SHUTDOWN_EVENT; + sse->sse_flags = 0; + sse->sse_length = sizeof(struct sctp_shutdown_event); + sse->sse_assoc_id = sctp_get_associd(stcb); + + SCTP_BUF_LEN(m_notify) = sizeof(struct sctp_shutdown_event); + SCTP_BUF_NEXT(m_notify) = NULL; + + /* append to socket */ + control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination, + 0, 0, stcb->asoc.context, 0, 0, 0, + m_notify); + if (control == NULL) { + /* no memory */ + sctp_m_freem(m_notify); + return; + } + control->length = SCTP_BUF_LEN(m_notify); + control->spec_flags = M_NOTIFICATION; + /* not that we need this */ + control->tail_mbuf = m_notify; + sctp_add_to_readq(stcb->sctp_ep, stcb, + control, + &stcb->sctp_socket->so_rcv, 1, SCTP_READ_LOCK_NOT_HELD, SCTP_SO_NOT_LOCKED); +} + +static void +sctp_notify_sender_dry_event(struct sctp_tcb *stcb, + int so_locked) +{ + struct mbuf *m_notify; + struct sctp_sender_dry_event *event; + struct sctp_queued_to_read *control; + + if ((stcb == NULL) || + sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DRYEVNT)) { + /* event not enabled */ + return; + } + + m_notify = sctp_get_mbuf_for_msg(sizeof(struct sctp_sender_dry_event), 0, M_NOWAIT, 1, MT_DATA); + if (m_notify == NULL) { + /* no space left */ + return; + } + SCTP_BUF_LEN(m_notify) = 0; + event = mtod(m_notify, struct sctp_sender_dry_event *); + memset(event, 0, sizeof(struct sctp_sender_dry_event)); + event->sender_dry_type = SCTP_SENDER_DRY_EVENT; + event->sender_dry_flags = 0; + event->sender_dry_length = sizeof(struct sctp_sender_dry_event); + event->sender_dry_assoc_id = sctp_get_associd(stcb); + + SCTP_BUF_LEN(m_notify) = sizeof(struct sctp_sender_dry_event); + SCTP_BUF_NEXT(m_notify) = NULL; + + /* append to socket */ + control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination, + 0, 0, stcb->asoc.context, 0, 0, 0, + m_notify); + if (control == NULL) { + /* no memory */ + sctp_m_freem(m_notify); + return; + } + control->length = SCTP_BUF_LEN(m_notify); + control->spec_flags = M_NOTIFICATION; + /* not that we need this */ + control->tail_mbuf = m_notify; + sctp_add_to_readq(stcb->sctp_ep, stcb, control, + &stcb->sctp_socket->so_rcv, 1, SCTP_READ_LOCK_NOT_HELD, so_locked); +} + +void +sctp_notify_stream_reset_add(struct sctp_tcb *stcb, uint16_t numberin, uint16_t numberout, int flag) +{ + struct mbuf *m_notify; + struct sctp_queued_to_read *control; + struct sctp_stream_change_event *stradd; + + if ((stcb == NULL) || + (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) || + (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || + (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET)) { + /* If the socket is gone we are out of here. */ + return; + } + if (sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_STREAM_CHANGEEVNT)) { + /* event not enabled */ + return; + } + + if ((stcb->asoc.peer_req_out) && flag) { + /* Peer made the request, don't tell the local user */ + stcb->asoc.peer_req_out = 0; + return; + } + stcb->asoc.peer_req_out = 0; + m_notify = sctp_get_mbuf_for_msg(sizeof(struct sctp_stream_change_event), 0, M_NOWAIT, 1, MT_DATA); + if (m_notify == NULL) + /* no space left */ + return; + SCTP_BUF_LEN(m_notify) = 0; + stradd = mtod(m_notify, struct sctp_stream_change_event *); + memset(stradd, 0, sizeof(struct sctp_stream_change_event)); + stradd->strchange_type = SCTP_STREAM_CHANGE_EVENT; + stradd->strchange_flags = flag; + stradd->strchange_length = sizeof(struct sctp_stream_change_event); + stradd->strchange_assoc_id = sctp_get_associd(stcb); + stradd->strchange_instrms = numberin; + stradd->strchange_outstrms = numberout; + SCTP_BUF_LEN(m_notify) = sizeof(struct sctp_stream_change_event); + SCTP_BUF_NEXT(m_notify) = NULL; + if (sctp_sbspace(&stcb->asoc, &stcb->sctp_socket->so_rcv) < SCTP_BUF_LEN(m_notify)) { + /* no space */ + sctp_m_freem(m_notify); + return; + } + /* append to socket */ + control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination, + 0, 0, stcb->asoc.context, 0, 0, 0, + m_notify); + if (control == NULL) { + /* no memory */ + sctp_m_freem(m_notify); + return; + } + control->length = SCTP_BUF_LEN(m_notify); + control->spec_flags = M_NOTIFICATION; + /* not that we need this */ + control->tail_mbuf = m_notify; + sctp_add_to_readq(stcb->sctp_ep, stcb, + control, + &stcb->sctp_socket->so_rcv, 1, SCTP_READ_LOCK_NOT_HELD, SCTP_SO_NOT_LOCKED); +} + +void +sctp_notify_stream_reset_tsn(struct sctp_tcb *stcb, uint32_t sending_tsn, uint32_t recv_tsn, int flag) +{ + struct mbuf *m_notify; + struct sctp_queued_to_read *control; + struct sctp_assoc_reset_event *strasoc; + + if ((stcb == NULL) || + (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) || + (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || + (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET)) { + /* If the socket is gone we are out of here. */ + return; + } + if (sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_ASSOC_RESETEVNT)) { + /* event not enabled */ + return; + } + + m_notify = sctp_get_mbuf_for_msg(sizeof(struct sctp_assoc_reset_event), 0, M_NOWAIT, 1, MT_DATA); + if (m_notify == NULL) + /* no space left */ + return; + SCTP_BUF_LEN(m_notify) = 0; + strasoc = mtod(m_notify, struct sctp_assoc_reset_event *); + memset(strasoc, 0, sizeof(struct sctp_assoc_reset_event)); + strasoc->assocreset_type = SCTP_ASSOC_RESET_EVENT; + strasoc->assocreset_flags = flag; + strasoc->assocreset_length = sizeof(struct sctp_assoc_reset_event); + strasoc->assocreset_assoc_id= sctp_get_associd(stcb); + strasoc->assocreset_local_tsn = sending_tsn; + strasoc->assocreset_remote_tsn = recv_tsn; + SCTP_BUF_LEN(m_notify) = sizeof(struct sctp_assoc_reset_event); + SCTP_BUF_NEXT(m_notify) = NULL; + if (sctp_sbspace(&stcb->asoc, &stcb->sctp_socket->so_rcv) < SCTP_BUF_LEN(m_notify)) { + /* no space */ + sctp_m_freem(m_notify); + return; + } + /* append to socket */ + control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination, + 0, 0, stcb->asoc.context, 0, 0, 0, + m_notify); + if (control == NULL) { + /* no memory */ + sctp_m_freem(m_notify); + return; + } + control->length = SCTP_BUF_LEN(m_notify); + control->spec_flags = M_NOTIFICATION; + /* not that we need this */ + control->tail_mbuf = m_notify; + sctp_add_to_readq(stcb->sctp_ep, stcb, + control, + &stcb->sctp_socket->so_rcv, 1, SCTP_READ_LOCK_NOT_HELD, SCTP_SO_NOT_LOCKED); +} + +static void +sctp_notify_stream_reset(struct sctp_tcb *stcb, + int number_entries, uint16_t * list, int flag) +{ + struct mbuf *m_notify; + struct sctp_queued_to_read *control; + struct sctp_stream_reset_event *strreset; + int len; + + if ((stcb == NULL) || + (sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_STREAM_RESETEVNT))) { + /* event not enabled */ + return; + } + + m_notify = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA); + if (m_notify == NULL) + /* no space left */ + return; + SCTP_BUF_LEN(m_notify) = 0; + len = sizeof(struct sctp_stream_reset_event) + (number_entries * sizeof(uint16_t)); + if (len > M_TRAILINGSPACE(m_notify)) { + /* never enough room */ + sctp_m_freem(m_notify); + return; + } + strreset = mtod(m_notify, struct sctp_stream_reset_event *); + memset(strreset, 0, len); + strreset->strreset_type = SCTP_STREAM_RESET_EVENT; + strreset->strreset_flags = flag; + strreset->strreset_length = len; + strreset->strreset_assoc_id = sctp_get_associd(stcb); + if (number_entries) { + int i; + + for (i = 0; i < number_entries; i++) { + strreset->strreset_stream_list[i] = ntohs(list[i]); + } + } + SCTP_BUF_LEN(m_notify) = len; + SCTP_BUF_NEXT(m_notify) = NULL; + if (sctp_sbspace(&stcb->asoc, &stcb->sctp_socket->so_rcv) < SCTP_BUF_LEN(m_notify)) { + /* no space */ + sctp_m_freem(m_notify); + return; + } + /* append to socket */ + control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination, + 0, 0, stcb->asoc.context, 0, 0, 0, + m_notify); + if (control == NULL) { + /* no memory */ + sctp_m_freem(m_notify); + return; + } + control->length = SCTP_BUF_LEN(m_notify); + control->spec_flags = M_NOTIFICATION; + /* not that we need this */ + control->tail_mbuf = m_notify; + sctp_add_to_readq(stcb->sctp_ep, stcb, + control, + &stcb->sctp_socket->so_rcv, 1, SCTP_READ_LOCK_NOT_HELD, SCTP_SO_NOT_LOCKED); +} + +static void +sctp_notify_remote_error(struct sctp_tcb *stcb, uint16_t error, struct sctp_error_chunk *chunk) +{ + struct mbuf *m_notify; + struct sctp_remote_error *sre; + struct sctp_queued_to_read *control; + unsigned int notif_len; + uint16_t chunk_len; + + if ((stcb == NULL) || + sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVPEERERR)) { + return; + } + if (chunk != NULL) { + chunk_len = ntohs(chunk->ch.chunk_length); + /* + * Only SCTP_CHUNK_BUFFER_SIZE are guaranteed to be + * contiguous. + */ + if (chunk_len > SCTP_CHUNK_BUFFER_SIZE) { + chunk_len = SCTP_CHUNK_BUFFER_SIZE; + } + } else { + chunk_len = 0; + } + notif_len = (unsigned int)(sizeof(struct sctp_remote_error) + chunk_len); + m_notify = sctp_get_mbuf_for_msg(notif_len, 0, M_NOWAIT, 1, MT_DATA); + if (m_notify == NULL) { + /* Retry with smaller value. */ + notif_len = (unsigned int)sizeof(struct sctp_remote_error); + m_notify = sctp_get_mbuf_for_msg(notif_len, 0, M_NOWAIT, 1, MT_DATA); + if (m_notify == NULL) { + return; + } + } + SCTP_BUF_NEXT(m_notify) = NULL; + sre = mtod(m_notify, struct sctp_remote_error *); + memset(sre, 0, notif_len); + sre->sre_type = SCTP_REMOTE_ERROR; + sre->sre_flags = 0; + sre->sre_length = sizeof(struct sctp_remote_error); + sre->sre_error = error; + sre->sre_assoc_id = sctp_get_associd(stcb); + if (notif_len > sizeof(struct sctp_remote_error)) { + memcpy(sre->sre_data, chunk, chunk_len); + sre->sre_length += chunk_len; + } + SCTP_BUF_LEN(m_notify) = sre->sre_length; + control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination, + 0, 0, stcb->asoc.context, 0, 0, 0, + m_notify); + if (control != NULL) { + control->length = SCTP_BUF_LEN(m_notify); + control->spec_flags = M_NOTIFICATION; + /* not that we need this */ + control->tail_mbuf = m_notify; + sctp_add_to_readq(stcb->sctp_ep, stcb, + control, + &stcb->sctp_socket->so_rcv, 1, + SCTP_READ_LOCK_NOT_HELD, SCTP_SO_NOT_LOCKED); + } else { + sctp_m_freem(m_notify); + } +} + +void +sctp_ulp_notify(uint32_t notification, struct sctp_tcb *stcb, + uint32_t error, void *data, int so_locked) +{ + if ((stcb == NULL) || + (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) || + (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || + (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET)) { + /* If the socket is gone we are out of here */ + return; + } +#if (defined(__FreeBSD__) || defined(_WIN32)) && !defined(__Userspace__) + if (stcb->sctp_socket->so_rcv.sb_state & SBS_CANTRCVMORE) { +#else + if (stcb->sctp_socket->so_state & SS_CANTRCVMORE) { +#endif + return; + } +#if defined(__APPLE__) && !defined(__Userspace__) + if (so_locked) { + sctp_lock_assert(SCTP_INP_SO(stcb->sctp_ep)); + } else { + sctp_unlock_assert(SCTP_INP_SO(stcb->sctp_ep)); + } +#endif + if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) || + (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) { + if ((notification == SCTP_NOTIFY_INTERFACE_DOWN) || + (notification == SCTP_NOTIFY_INTERFACE_UP) || + (notification == SCTP_NOTIFY_INTERFACE_CONFIRMED)) { + /* Don't report these in front states */ + return; + } + } + switch (notification) { + case SCTP_NOTIFY_ASSOC_UP: + if (stcb->asoc.assoc_up_sent == 0) { + sctp_notify_assoc_change(SCTP_COMM_UP, stcb, error, NULL, false, false, so_locked); + stcb->asoc.assoc_up_sent = 1; + } + if (stcb->asoc.adaptation_needed && (stcb->asoc.adaptation_sent == 0)) { + sctp_notify_adaptation_layer(stcb); + } + if (stcb->asoc.auth_supported == 0) { + sctp_ulp_notify(SCTP_NOTIFY_NO_PEER_AUTH, stcb, 0, + NULL, so_locked); + } + break; + case SCTP_NOTIFY_ASSOC_DOWN: + sctp_notify_assoc_change(SCTP_SHUTDOWN_COMP, stcb, error, NULL, false, false, so_locked); +#if defined(__Userspace__) + if (stcb->sctp_ep->recv_callback) { + if (stcb->sctp_socket) { + union sctp_sockstore addr; + struct sctp_rcvinfo rcv; + + memset(&addr, 0, sizeof(union sctp_sockstore)); + memset(&rcv, 0, sizeof(struct sctp_rcvinfo)); + atomic_add_int(&stcb->asoc.refcnt, 1); + SCTP_TCB_UNLOCK(stcb); + stcb->sctp_ep->recv_callback(stcb->sctp_socket, addr, NULL, 0, rcv, 0, stcb->sctp_ep->ulp_info); + SCTP_TCB_LOCK(stcb); + atomic_subtract_int(&stcb->asoc.refcnt, 1); + } + } +#endif + break; + case SCTP_NOTIFY_INTERFACE_DOWN: + { + struct sctp_nets *net; + + net = (struct sctp_nets *)data; + sctp_notify_peer_addr_change(stcb, SCTP_ADDR_UNREACHABLE, + (struct sockaddr *)&net->ro._l_addr, error, so_locked); + break; + } + case SCTP_NOTIFY_INTERFACE_UP: + { + struct sctp_nets *net; + + net = (struct sctp_nets *)data; + sctp_notify_peer_addr_change(stcb, SCTP_ADDR_AVAILABLE, + (struct sockaddr *)&net->ro._l_addr, error, so_locked); + break; + } + case SCTP_NOTIFY_INTERFACE_CONFIRMED: + { + struct sctp_nets *net; + + net = (struct sctp_nets *)data; + sctp_notify_peer_addr_change(stcb, SCTP_ADDR_CONFIRMED, + (struct sockaddr *)&net->ro._l_addr, error, so_locked); + break; + } + case SCTP_NOTIFY_SPECIAL_SP_FAIL: + sctp_notify_send_failed2(stcb, error, + (struct sctp_stream_queue_pending *)data, so_locked); + break; + case SCTP_NOTIFY_SENT_DG_FAIL: + sctp_notify_send_failed(stcb, 1, error, + (struct sctp_tmit_chunk *)data, so_locked); + break; + case SCTP_NOTIFY_UNSENT_DG_FAIL: + sctp_notify_send_failed(stcb, 0, error, + (struct sctp_tmit_chunk *)data, so_locked); + break; + case SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION: + { + uint32_t val; + val = *((uint32_t *)data); + + sctp_notify_partial_delivery_indication(stcb, error, val, so_locked); + break; + } + case SCTP_NOTIFY_ASSOC_LOC_ABORTED: + if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) || + (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) { + sctp_notify_assoc_change(SCTP_CANT_STR_ASSOC, stcb, error, data, false, false, so_locked); + } else { + sctp_notify_assoc_change(SCTP_COMM_LOST, stcb, error, data, false, false, so_locked); + } + break; + case SCTP_NOTIFY_ASSOC_REM_ABORTED: + if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) || + (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) { + sctp_notify_assoc_change(SCTP_CANT_STR_ASSOC, stcb, error, data, true, false, so_locked); + } else { + sctp_notify_assoc_change(SCTP_COMM_LOST, stcb, error, data, true, false, so_locked); + } + break; + case SCTP_NOTIFY_ASSOC_TIMEDOUT: + if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) || + (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) { + sctp_notify_assoc_change(SCTP_CANT_STR_ASSOC, stcb, error, data, false, true, so_locked); + } else { + sctp_notify_assoc_change(SCTP_COMM_LOST, stcb, error, data, false, true, so_locked); + } + break; + case SCTP_NOTIFY_ASSOC_RESTART: + sctp_notify_assoc_change(SCTP_RESTART, stcb, error, NULL, false, false, so_locked); + if (stcb->asoc.auth_supported == 0) { + sctp_ulp_notify(SCTP_NOTIFY_NO_PEER_AUTH, stcb, 0, + NULL, so_locked); + } + break; + case SCTP_NOTIFY_STR_RESET_SEND: + sctp_notify_stream_reset(stcb, error, ((uint16_t *) data), SCTP_STREAM_RESET_OUTGOING_SSN); + break; + case SCTP_NOTIFY_STR_RESET_RECV: + sctp_notify_stream_reset(stcb, error, ((uint16_t *) data), SCTP_STREAM_RESET_INCOMING); + break; + case SCTP_NOTIFY_STR_RESET_FAILED_OUT: + sctp_notify_stream_reset(stcb, error, ((uint16_t *) data), + (SCTP_STREAM_RESET_OUTGOING_SSN|SCTP_STREAM_RESET_FAILED)); + break; + case SCTP_NOTIFY_STR_RESET_DENIED_OUT: + sctp_notify_stream_reset(stcb, error, ((uint16_t *) data), + (SCTP_STREAM_RESET_OUTGOING_SSN|SCTP_STREAM_RESET_DENIED)); + break; + case SCTP_NOTIFY_STR_RESET_FAILED_IN: + sctp_notify_stream_reset(stcb, error, ((uint16_t *) data), + (SCTP_STREAM_RESET_INCOMING|SCTP_STREAM_RESET_FAILED)); + break; + case SCTP_NOTIFY_STR_RESET_DENIED_IN: + sctp_notify_stream_reset(stcb, error, ((uint16_t *) data), + (SCTP_STREAM_RESET_INCOMING|SCTP_STREAM_RESET_DENIED)); + break; + case SCTP_NOTIFY_ASCONF_ADD_IP: + sctp_notify_peer_addr_change(stcb, SCTP_ADDR_ADDED, data, + error, so_locked); + break; + case SCTP_NOTIFY_ASCONF_DELETE_IP: + sctp_notify_peer_addr_change(stcb, SCTP_ADDR_REMOVED, data, + error, so_locked); + break; + case SCTP_NOTIFY_ASCONF_SET_PRIMARY: + sctp_notify_peer_addr_change(stcb, SCTP_ADDR_MADE_PRIM, data, + error, so_locked); + break; + case SCTP_NOTIFY_PEER_SHUTDOWN: + sctp_notify_shutdown_event(stcb); + break; + case SCTP_NOTIFY_AUTH_NEW_KEY: + sctp_notify_authentication(stcb, SCTP_AUTH_NEW_KEY, error, + (uint16_t)(uintptr_t)data, + so_locked); + break; + case SCTP_NOTIFY_AUTH_FREE_KEY: + sctp_notify_authentication(stcb, SCTP_AUTH_FREE_KEY, error, + (uint16_t)(uintptr_t)data, + so_locked); + break; + case SCTP_NOTIFY_NO_PEER_AUTH: + sctp_notify_authentication(stcb, SCTP_AUTH_NO_AUTH, error, + (uint16_t)(uintptr_t)data, + so_locked); + break; + case SCTP_NOTIFY_SENDER_DRY: + sctp_notify_sender_dry_event(stcb, so_locked); + break; + case SCTP_NOTIFY_REMOTE_ERROR: + sctp_notify_remote_error(stcb, error, data); + break; + default: + SCTPDBG(SCTP_DEBUG_UTIL1, "%s: unknown notification %xh (%u)\n", + __func__, notification, notification); + break; + } /* end switch */ +} + +void +sctp_report_all_outbound(struct sctp_tcb *stcb, uint16_t error, int so_locked) +{ + struct sctp_association *asoc; + struct sctp_stream_out *outs; + struct sctp_tmit_chunk *chk, *nchk; + struct sctp_stream_queue_pending *sp, *nsp; + int i; + + if (stcb == NULL) { + return; + } + asoc = &stcb->asoc; + if (asoc->state & SCTP_STATE_ABOUT_TO_BE_FREED) { + /* already being freed */ + return; + } +#if defined(__APPLE__) && !defined(__Userspace__) + if (so_locked) { + sctp_lock_assert(SCTP_INP_SO(stcb->sctp_ep)); + } else { + sctp_unlock_assert(SCTP_INP_SO(stcb->sctp_ep)); + } +#endif + if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) || + (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || + (asoc->state & SCTP_STATE_CLOSED_SOCKET)) { + return; + } + /* now through all the gunk freeing chunks */ + /* sent queue SHOULD be empty */ + TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { + TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); + asoc->sent_queue_cnt--; + if (chk->sent != SCTP_DATAGRAM_NR_ACKED) { + if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) { + asoc->strmout[chk->rec.data.sid].chunks_on_queues--; +#ifdef INVARIANTS + } else { + panic("No chunks on the queues for sid %u.", chk->rec.data.sid); +#endif + } + } + if (chk->data != NULL) { + sctp_free_bufspace(stcb, asoc, chk, 1); + sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, + error, chk, so_locked); + if (chk->data) { + sctp_m_freem(chk->data); + chk->data = NULL; + } + } + sctp_free_a_chunk(stcb, chk, so_locked); + /*sa_ignore FREED_MEMORY*/ + } + /* pending send queue SHOULD be empty */ + TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { + TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); + asoc->send_queue_cnt--; + if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) { + asoc->strmout[chk->rec.data.sid].chunks_on_queues--; +#ifdef INVARIANTS + } else { + panic("No chunks on the queues for sid %u.", chk->rec.data.sid); +#endif + } + if (chk->data != NULL) { + sctp_free_bufspace(stcb, asoc, chk, 1); + sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, + error, chk, so_locked); + if (chk->data) { + sctp_m_freem(chk->data); + chk->data = NULL; + } + } + sctp_free_a_chunk(stcb, chk, so_locked); + /*sa_ignore FREED_MEMORY*/ + } + for (i = 0; i < asoc->streamoutcnt; i++) { + /* For each stream */ + outs = &asoc->strmout[i]; + /* clean up any sends there */ + TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { + atomic_subtract_int(&asoc->stream_queue_cnt, 1); + TAILQ_REMOVE(&outs->outqueue, sp, next); + stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp); + sctp_free_spbufspace(stcb, asoc, sp); + if (sp->data) { + sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, + error, (void *)sp, so_locked); + if (sp->data) { + sctp_m_freem(sp->data); + sp->data = NULL; + sp->tail_mbuf = NULL; + sp->length = 0; + } + } + if (sp->net) { + sctp_free_remote_addr(sp->net); + sp->net = NULL; + } + /* Free the chunk */ + sctp_free_a_strmoq(stcb, sp, so_locked); + /*sa_ignore FREED_MEMORY*/ + } + } +} + +void +sctp_abort_notification(struct sctp_tcb *stcb, bool from_peer, bool timeout, + uint16_t error, struct sctp_abort_chunk *abort, + int so_locked) +{ + if (stcb == NULL) { + return; + } +#if defined(__APPLE__) && !defined(__Userspace__) + if (so_locked) { + sctp_lock_assert(SCTP_INP_SO(stcb->sctp_ep)); + } else { + sctp_unlock_assert(SCTP_INP_SO(stcb->sctp_ep)); + } +#endif + SCTP_TCB_LOCK_ASSERT(stcb); + + if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || + ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && + (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { + sctp_pcb_add_flags(stcb->sctp_ep, SCTP_PCB_FLAGS_WAS_ABORTED); + } + if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) || + (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || + (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET)) { + return; + } + SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_WAS_ABORTED); + /* Tell them we lost the asoc */ + sctp_report_all_outbound(stcb, error, so_locked); + if (from_peer) { + sctp_ulp_notify(SCTP_NOTIFY_ASSOC_REM_ABORTED, stcb, error, abort, so_locked); + } else { + if (timeout) { + sctp_ulp_notify(SCTP_NOTIFY_ASSOC_TIMEDOUT, stcb, error, abort, so_locked); + } else { + sctp_ulp_notify(SCTP_NOTIFY_ASSOC_LOC_ABORTED, stcb, error, abort, so_locked); + } + } +} + +void +sctp_abort_association(struct sctp_inpcb *inp, struct sctp_tcb *stcb, + struct mbuf *m, int iphlen, + struct sockaddr *src, struct sockaddr *dst, + struct sctphdr *sh, struct mbuf *op_err, +#if defined(__FreeBSD__) && !defined(__Userspace__) + uint8_t mflowtype, uint32_t mflowid, +#endif + uint32_t vrf_id, uint16_t port) +{ +#if defined(__APPLE__) && !defined(__Userspace__) + struct socket *so; +#endif + struct sctp_gen_error_cause* cause; + uint32_t vtag; + uint16_t cause_code; + + if (stcb != NULL) { + vtag = stcb->asoc.peer_vtag; + vrf_id = stcb->asoc.vrf_id; + if (op_err != NULL) { + /* Read the cause code from the error cause. */ + cause = mtod(op_err, struct sctp_gen_error_cause *); + cause_code = ntohs(cause->code); + } else { + cause_code = 0; + } + } else { + vtag = 0; + } + sctp_send_abort(m, iphlen, src, dst, sh, vtag, op_err, +#if defined(__FreeBSD__) && !defined(__Userspace__) + mflowtype, mflowid, inp->fibnum, +#endif + vrf_id, port); + if (stcb != NULL) { + /* We have a TCB to abort, send notification too */ + sctp_abort_notification(stcb, false, false, cause_code, NULL, SCTP_SO_NOT_LOCKED); + /* Ok, now lets free it */ +#if defined(__APPLE__) && !defined(__Userspace__) + so = SCTP_INP_SO(inp); + atomic_add_int(&stcb->asoc.refcnt, 1); + SCTP_TCB_UNLOCK(stcb); + SCTP_SOCKET_LOCK(so, 1); + SCTP_TCB_LOCK(stcb); + atomic_subtract_int(&stcb->asoc.refcnt, 1); +#endif + SCTP_STAT_INCR_COUNTER32(sctps_aborted); + if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) || + (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) { + SCTP_STAT_DECR_GAUGE32(sctps_currestab); + } + (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, + SCTP_FROM_SCTPUTIL + SCTP_LOC_4); +#if defined(__APPLE__) && !defined(__Userspace__) + SCTP_SOCKET_UNLOCK(so, 1); +#endif + } +} +#ifdef SCTP_ASOCLOG_OF_TSNS +void +sctp_print_out_track_log(struct sctp_tcb *stcb) +{ +#ifdef NOSIY_PRINTS + int i; + SCTP_PRINTF("Last ep reason:%x\n", stcb->sctp_ep->last_abort_code); + SCTP_PRINTF("IN bound TSN log-aaa\n"); + if ((stcb->asoc.tsn_in_at == 0) && (stcb->asoc.tsn_in_wrapped == 0)) { + SCTP_PRINTF("None rcvd\n"); + goto none_in; + } + if (stcb->asoc.tsn_in_wrapped) { + for (i = stcb->asoc.tsn_in_at; i < SCTP_TSN_LOG_SIZE; i++) { + SCTP_PRINTF("TSN:%x strm:%d seq:%d flags:%x sz:%d\n", + stcb->asoc.in_tsnlog[i].tsn, + stcb->asoc.in_tsnlog[i].strm, + stcb->asoc.in_tsnlog[i].seq, + stcb->asoc.in_tsnlog[i].flgs, + stcb->asoc.in_tsnlog[i].sz); + } + } + if (stcb->asoc.tsn_in_at) { + for (i = 0; i < stcb->asoc.tsn_in_at; i++) { + SCTP_PRINTF("TSN:%x strm:%d seq:%d flags:%x sz:%d\n", + stcb->asoc.in_tsnlog[i].tsn, + stcb->asoc.in_tsnlog[i].strm, + stcb->asoc.in_tsnlog[i].seq, + stcb->asoc.in_tsnlog[i].flgs, + stcb->asoc.in_tsnlog[i].sz); + } + } + none_in: + SCTP_PRINTF("OUT bound TSN log-aaa\n"); + if ((stcb->asoc.tsn_out_at == 0) && + (stcb->asoc.tsn_out_wrapped == 0)) { + SCTP_PRINTF("None sent\n"); + } + if (stcb->asoc.tsn_out_wrapped) { + for (i = stcb->asoc.tsn_out_at; i < SCTP_TSN_LOG_SIZE; i++) { + SCTP_PRINTF("TSN:%x strm:%d seq:%d flags:%x sz:%d\n", + stcb->asoc.out_tsnlog[i].tsn, + stcb->asoc.out_tsnlog[i].strm, + stcb->asoc.out_tsnlog[i].seq, + stcb->asoc.out_tsnlog[i].flgs, + stcb->asoc.out_tsnlog[i].sz); + } + } + if (stcb->asoc.tsn_out_at) { + for (i = 0; i < stcb->asoc.tsn_out_at; i++) { + SCTP_PRINTF("TSN:%x strm:%d seq:%d flags:%x sz:%d\n", + stcb->asoc.out_tsnlog[i].tsn, + stcb->asoc.out_tsnlog[i].strm, + stcb->asoc.out_tsnlog[i].seq, + stcb->asoc.out_tsnlog[i].flgs, + stcb->asoc.out_tsnlog[i].sz); + } + } +#endif +} +#endif + +void +sctp_abort_an_association(struct sctp_inpcb *inp, struct sctp_tcb *stcb, + struct mbuf *op_err, bool timedout, int so_locked) +{ +#if defined(__APPLE__) && !defined(__Userspace__) + struct socket *so; +#endif + struct sctp_gen_error_cause* cause; + uint16_t cause_code; + +#if defined(__APPLE__) && !defined(__Userspace__) + so = SCTP_INP_SO(inp); +#endif +#if defined(__APPLE__) && !defined(__Userspace__) + if (so_locked) { + sctp_lock_assert(SCTP_INP_SO(inp)); + } else { + sctp_unlock_assert(SCTP_INP_SO(inp)); + } +#endif + if (stcb == NULL) { + /* Got to have a TCB */ + if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { + if (LIST_EMPTY(&inp->sctp_asoc_list)) { +#if defined(__APPLE__) && !defined(__Userspace__) + if (!so_locked) { + SCTP_SOCKET_LOCK(so, 1); + } +#endif + sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT, + SCTP_CALLED_DIRECTLY_NOCMPSET); +#if defined(__APPLE__) && !defined(__Userspace__) + if (!so_locked) { + SCTP_SOCKET_UNLOCK(so, 1); + } +#endif + } + } + return; + } + if (op_err != NULL) { + /* Read the cause code from the error cause. */ + cause = mtod(op_err, struct sctp_gen_error_cause *); + cause_code = ntohs(cause->code); + } else { + cause_code = 0; + } + /* notify the peer */ + sctp_send_abort_tcb(stcb, op_err, so_locked); + SCTP_STAT_INCR_COUNTER32(sctps_aborted); + if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) || + (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) { + SCTP_STAT_DECR_GAUGE32(sctps_currestab); + } + /* notify the ulp */ + if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) { + sctp_abort_notification(stcb, false, timedout, cause_code, NULL, so_locked); + } + /* now free the asoc */ +#ifdef SCTP_ASOCLOG_OF_TSNS + sctp_print_out_track_log(stcb); +#endif +#if defined(__APPLE__) && !defined(__Userspace__) + if (!so_locked) { + atomic_add_int(&stcb->asoc.refcnt, 1); + SCTP_TCB_UNLOCK(stcb); + SCTP_SOCKET_LOCK(so, 1); + SCTP_TCB_LOCK(stcb); + atomic_subtract_int(&stcb->asoc.refcnt, 1); + } +#endif + (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, + SCTP_FROM_SCTPUTIL + SCTP_LOC_5); +#if defined(__APPLE__) && !defined(__Userspace__) + if (!so_locked) { + SCTP_SOCKET_UNLOCK(so, 1); + } +#endif +} + +void +sctp_handle_ootb(struct mbuf *m, int iphlen, int offset, + struct sockaddr *src, struct sockaddr *dst, + struct sctphdr *sh, struct sctp_inpcb *inp, + struct mbuf *cause, +#if defined(__FreeBSD__) && !defined(__Userspace__) + uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum, +#endif + uint32_t vrf_id, uint16_t port) +{ + struct sctp_chunkhdr *ch, chunk_buf; + unsigned int chk_length; + int contains_init_chunk; + + SCTP_STAT_INCR_COUNTER32(sctps_outoftheblue); + /* Generate a TO address for future reference */ + if (inp && (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { + if (LIST_EMPTY(&inp->sctp_asoc_list)) { +#if defined(__APPLE__) && !defined(__Userspace__) + SCTP_SOCKET_LOCK(SCTP_INP_SO(inp), 1); +#endif + sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT, + SCTP_CALLED_DIRECTLY_NOCMPSET); +#if defined(__APPLE__) && !defined(__Userspace__) + SCTP_SOCKET_UNLOCK(SCTP_INP_SO(inp), 1); +#endif + } + } + contains_init_chunk = 0; + ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset, + sizeof(*ch), (uint8_t *) & chunk_buf); + while (ch != NULL) { + chk_length = ntohs(ch->chunk_length); + if (chk_length < sizeof(*ch)) { + /* break to abort land */ + break; + } + switch (ch->chunk_type) { + case SCTP_INIT: + contains_init_chunk = 1; + break; + case SCTP_PACKET_DROPPED: + /* we don't respond to pkt-dropped */ + return; + case SCTP_ABORT_ASSOCIATION: + /* we don't respond with an ABORT to an ABORT */ + return; + case SCTP_SHUTDOWN_COMPLETE: + /* + * we ignore it since we are not waiting for it and + * peer is gone + */ + return; + case SCTP_SHUTDOWN_ACK: + sctp_send_shutdown_complete2(src, dst, sh, +#if defined(__FreeBSD__) && !defined(__Userspace__) + mflowtype, mflowid, fibnum, +#endif + vrf_id, port); + return; + default: + break; + } + offset += SCTP_SIZE32(chk_length); + ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset, + sizeof(*ch), (uint8_t *) & chunk_buf); + } + if ((SCTP_BASE_SYSCTL(sctp_blackhole) == 0) || + ((SCTP_BASE_SYSCTL(sctp_blackhole) == 1) && + (contains_init_chunk == 0))) { + sctp_send_abort(m, iphlen, src, dst, sh, 0, cause, +#if defined(__FreeBSD__) && !defined(__Userspace__) + mflowtype, mflowid, fibnum, +#endif + vrf_id, port); + } +} + +/* + * check the inbound datagram to make sure there is not an abort inside it, + * if there is return 1, else return 0. + */ +int +sctp_is_there_an_abort_here(struct mbuf *m, int iphlen, uint32_t *vtag) +{ + struct sctp_chunkhdr *ch; + struct sctp_init_chunk *init_chk, chunk_buf; + int offset; + unsigned int chk_length; + + offset = iphlen + sizeof(struct sctphdr); + ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset, sizeof(*ch), + (uint8_t *) & chunk_buf); + while (ch != NULL) { + chk_length = ntohs(ch->chunk_length); + if (chk_length < sizeof(*ch)) { + /* packet is probably corrupt */ + break; + } + /* we seem to be ok, is it an abort? */ + if (ch->chunk_type == SCTP_ABORT_ASSOCIATION) { + /* yep, tell them */ + return (1); + } + if ((ch->chunk_type == SCTP_INITIATION) || + (ch->chunk_type == SCTP_INITIATION_ACK)) { + /* need to update the Vtag */ + init_chk = (struct sctp_init_chunk *)sctp_m_getptr(m, + offset, sizeof(struct sctp_init_chunk), (uint8_t *) & chunk_buf); + if (init_chk != NULL) { + *vtag = ntohl(init_chk->init.initiate_tag); + } + } + /* Nope, move to the next chunk */ + offset += SCTP_SIZE32(chk_length); + ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset, + sizeof(*ch), (uint8_t *) & chunk_buf); + } + return (0); +} + +/* + * currently (2/02), ifa_addr embeds scope_id's and don't have sin6_scope_id + * set (i.e. it's 0) so, create this function to compare link local scopes + */ +#ifdef INET6 +uint32_t +sctp_is_same_scope(struct sockaddr_in6 *addr1, struct sockaddr_in6 *addr2) +{ +#if defined(__Userspace__) + /*__Userspace__ Returning 1 here always */ +#endif +#if defined(SCTP_EMBEDDED_V6_SCOPE) + struct sockaddr_in6 a, b; + + /* save copies */ + a = *addr1; + b = *addr2; + + if (a.sin6_scope_id == 0) +#ifdef SCTP_KAME + if (sa6_recoverscope(&a)) { +#else + if (in6_recoverscope(&a, &a.sin6_addr, NULL)) { +#endif /* SCTP_KAME */ + /* can't get scope, so can't match */ + return (0); + } + if (b.sin6_scope_id == 0) +#ifdef SCTP_KAME + if (sa6_recoverscope(&b)) { +#else + if (in6_recoverscope(&b, &b.sin6_addr, NULL)) { +#endif /* SCTP_KAME */ + /* can't get scope, so can't match */ + return (0); + } + if (a.sin6_scope_id != b.sin6_scope_id) + return (0); +#else + if (addr1->sin6_scope_id != addr2->sin6_scope_id) + return (0); +#endif /* SCTP_EMBEDDED_V6_SCOPE */ + + return (1); +} + +#if defined(SCTP_EMBEDDED_V6_SCOPE) +/* + * returns a sockaddr_in6 with embedded scope recovered and removed + */ +struct sockaddr_in6 * +sctp_recover_scope(struct sockaddr_in6 *addr, struct sockaddr_in6 *store) +{ + /* check and strip embedded scope junk */ + if (addr->sin6_family == AF_INET6) { + if (IN6_IS_SCOPE_LINKLOCAL(&addr->sin6_addr)) { + if (addr->sin6_scope_id == 0) { + *store = *addr; +#ifdef SCTP_KAME + if (!sa6_recoverscope(store)) { +#else + if (!in6_recoverscope(store, &store->sin6_addr, + NULL)) { +#endif /* SCTP_KAME */ + /* use the recovered scope */ + addr = store; + } + } else { + /* else, return the original "to" addr */ + in6_clearscope(&addr->sin6_addr); + } + } + } + return (addr); +} +#endif /* SCTP_EMBEDDED_V6_SCOPE */ +#endif + +/* + * are the two addresses the same? currently a "scopeless" check returns: 1 + * if same, 0 if not + */ +int +sctp_cmpaddr(struct sockaddr *sa1, struct sockaddr *sa2) +{ + + /* must be valid */ + if (sa1 == NULL || sa2 == NULL) + return (0); + + /* must be the same family */ + if (sa1->sa_family != sa2->sa_family) + return (0); + + switch (sa1->sa_family) { +#ifdef INET6 + case AF_INET6: + { + /* IPv6 addresses */ + struct sockaddr_in6 *sin6_1, *sin6_2; + + sin6_1 = (struct sockaddr_in6 *)sa1; + sin6_2 = (struct sockaddr_in6 *)sa2; + return (SCTP6_ARE_ADDR_EQUAL(sin6_1, + sin6_2)); + } +#endif +#ifdef INET + case AF_INET: + { + /* IPv4 addresses */ + struct sockaddr_in *sin_1, *sin_2; + + sin_1 = (struct sockaddr_in *)sa1; + sin_2 = (struct sockaddr_in *)sa2; + return (sin_1->sin_addr.s_addr == sin_2->sin_addr.s_addr); + } +#endif +#if defined(__Userspace__) + case AF_CONN: + { + struct sockaddr_conn *sconn_1, *sconn_2; + + sconn_1 = (struct sockaddr_conn *)sa1; + sconn_2 = (struct sockaddr_conn *)sa2; + return (sconn_1->sconn_addr == sconn_2->sconn_addr); + } +#endif + default: + /* we don't do these... */ + return (0); + } +} + +void +sctp_print_address(struct sockaddr *sa) +{ +#ifdef INET6 +#if defined(__FreeBSD__) && !defined(__Userspace__) + char ip6buf[INET6_ADDRSTRLEN]; +#endif +#endif + + switch (sa->sa_family) { +#ifdef INET6 + case AF_INET6: + { + struct sockaddr_in6 *sin6; + + sin6 = (struct sockaddr_in6 *)sa; +#if defined(__Userspace__) + SCTP_PRINTF("IPv6 address: %x:%x:%x:%x:%x:%x:%x:%x:port:%d scope:%u\n", + ntohs(sin6->sin6_addr.s6_addr16[0]), + ntohs(sin6->sin6_addr.s6_addr16[1]), + ntohs(sin6->sin6_addr.s6_addr16[2]), + ntohs(sin6->sin6_addr.s6_addr16[3]), + ntohs(sin6->sin6_addr.s6_addr16[4]), + ntohs(sin6->sin6_addr.s6_addr16[5]), + ntohs(sin6->sin6_addr.s6_addr16[6]), + ntohs(sin6->sin6_addr.s6_addr16[7]), + ntohs(sin6->sin6_port), + sin6->sin6_scope_id); +#else +#if defined(__FreeBSD__) && !defined(__Userspace__) + SCTP_PRINTF("IPv6 address: %s:port:%d scope:%u\n", + ip6_sprintf(ip6buf, &sin6->sin6_addr), + ntohs(sin6->sin6_port), + sin6->sin6_scope_id); +#else + SCTP_PRINTF("IPv6 address: %s:port:%d scope:%u\n", + ip6_sprintf(&sin6->sin6_addr), + ntohs(sin6->sin6_port), + sin6->sin6_scope_id); +#endif +#endif + break; + } +#endif +#ifdef INET + case AF_INET: + { + struct sockaddr_in *sin; + unsigned char *p; + + sin = (struct sockaddr_in *)sa; + p = (unsigned char *)&sin->sin_addr; + SCTP_PRINTF("IPv4 address: %u.%u.%u.%u:%d\n", + p[0], p[1], p[2], p[3], ntohs(sin->sin_port)); + break; + } +#endif +#if defined(__Userspace__) + case AF_CONN: + { + struct sockaddr_conn *sconn; + + sconn = (struct sockaddr_conn *)sa; + SCTP_PRINTF("AF_CONN address: %p\n", sconn->sconn_addr); + break; + } +#endif + default: + SCTP_PRINTF("?\n"); + break; + } +} + +void +sctp_pull_off_control_to_new_inp(struct sctp_inpcb *old_inp, + struct sctp_inpcb *new_inp, + struct sctp_tcb *stcb, + int waitflags) +{ + /* + * go through our old INP and pull off any control structures that + * belong to stcb and move then to the new inp. + */ + struct socket *old_so, *new_so; + struct sctp_queued_to_read *control, *nctl; + struct sctp_readhead tmp_queue; + struct mbuf *m; +#if (defined(__FreeBSD__) || defined(__APPLE__)) && !defined(__Userspace__) + int error = 0; +#endif + + old_so = old_inp->sctp_socket; + new_so = new_inp->sctp_socket; + TAILQ_INIT(&tmp_queue); +#if (defined(__FreeBSD__) || defined(__APPLE__)) && !defined(__Userspace__) +#if defined(__FreeBSD__) + error = SOCK_IO_RECV_LOCK(old_so, waitflags); +#else + error = sblock(&old_so->so_rcv, waitflags); +#endif + if (error) { + /* Gak, can't get I/O lock, we have a problem. + * data will be left stranded.. and we + * don't dare look at it since the + * other thread may be reading something. + * Oh well, its a screwed up app that does + * a peeloff OR a accept while reading + * from the main socket... actually its + * only the peeloff() case, since I think + * read will fail on a listening socket.. + */ + return; + } +#endif + /* lock the socket buffers */ + SCTP_INP_READ_LOCK(old_inp); + TAILQ_FOREACH_SAFE(control, &old_inp->read_queue, next, nctl) { + /* Pull off all for out target stcb */ + if (control->stcb == stcb) { + /* remove it we want it */ + TAILQ_REMOVE(&old_inp->read_queue, control, next); + TAILQ_INSERT_TAIL(&tmp_queue, control, next); + m = control->data; + while (m) { + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) { + sctp_sblog(&old_so->so_rcv, control->do_not_ref_stcb?NULL:stcb, SCTP_LOG_SBFREE,SCTP_BUF_LEN(m)); + } + sctp_sbfree(control, stcb, &old_so->so_rcv, m); + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) { + sctp_sblog(&old_so->so_rcv, control->do_not_ref_stcb?NULL:stcb, SCTP_LOG_SBRESULT, 0); + } + m = SCTP_BUF_NEXT(m); + } + } + } + SCTP_INP_READ_UNLOCK(old_inp); + /* Remove the recv-lock on the old socket */ +#if defined(__APPLE__) && !defined(__Userspace__) + sbunlock(&old_so->so_rcv, 1); +#endif +#if defined(__FreeBSD__) && !defined(__Userspace__) + SOCK_IO_RECV_UNLOCK(old_so); +#endif + /* Now we move them over to the new socket buffer */ + SCTP_INP_READ_LOCK(new_inp); + TAILQ_FOREACH_SAFE(control, &tmp_queue, next, nctl) { + TAILQ_INSERT_TAIL(&new_inp->read_queue, control, next); + m = control->data; + while (m) { + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) { + sctp_sblog(&new_so->so_rcv, control->do_not_ref_stcb?NULL:stcb, SCTP_LOG_SBALLOC, SCTP_BUF_LEN(m)); + } + sctp_sballoc(stcb, &new_so->so_rcv, m); + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) { + sctp_sblog(&new_so->so_rcv, control->do_not_ref_stcb?NULL:stcb, SCTP_LOG_SBRESULT, 0); + } + m = SCTP_BUF_NEXT(m); + } + } + SCTP_INP_READ_UNLOCK(new_inp); +} + +void +sctp_wakeup_the_read_socket(struct sctp_inpcb *inp, + struct sctp_tcb *stcb, + int so_locked +#if !(defined(__APPLE__) && !defined(__Userspace__)) + SCTP_UNUSED +#endif +) +{ + if ((inp != NULL) && + (inp->sctp_socket != NULL) && + (((inp->sctp_flags & (SCTP_PCB_FLAGS_TCPTYPE | SCTP_PCB_FLAGS_IN_TCPPOOL)) == 0) || + !SCTP_IS_LISTENING(inp))) { +#if defined(__APPLE__) && !defined(__Userspace__) + struct socket *so; + + so = SCTP_INP_SO(inp); + if (!so_locked) { + if (stcb) { + atomic_add_int(&stcb->asoc.refcnt, 1); + SCTP_TCB_UNLOCK(stcb); + } + SCTP_SOCKET_LOCK(so, 1); + if (stcb) { + SCTP_TCB_LOCK(stcb); + atomic_subtract_int(&stcb->asoc.refcnt, 1); + } + if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { + SCTP_SOCKET_UNLOCK(so, 1); + return; + } + } +#endif + sctp_sorwakeup(inp, inp->sctp_socket); +#if defined(__APPLE__) && !defined(__Userspace__) + if (!so_locked) { + SCTP_SOCKET_UNLOCK(so, 1); + } +#endif + } +} +#if defined(__Userspace__) + +void +sctp_invoke_recv_callback(struct sctp_inpcb *inp, + struct sctp_tcb *stcb, + struct sctp_queued_to_read *control, + int inp_read_lock_held) +{ + uint32_t pd_point, length; + + if ((inp->recv_callback == NULL) || + (stcb == NULL) || + (stcb->sctp_socket == NULL)) { + return; + } + + length = control->length; + if (stcb != NULL && stcb->sctp_socket != NULL) { + pd_point = min(SCTP_SB_LIMIT_RCV(stcb->sctp_socket) >> SCTP_PARTIAL_DELIVERY_SHIFT, + stcb->sctp_ep->partial_delivery_point); + } else { + pd_point = inp->partial_delivery_point; + } + if ((control->end_added == 1) || (length >= pd_point)) { + struct socket *so; + struct mbuf *m; + char *buffer; + struct sctp_rcvinfo rcv; + union sctp_sockstore addr; + int flags; + + if ((buffer = malloc(length)) == NULL) { + return; + } + if (inp_read_lock_held == 0) { + SCTP_INP_READ_LOCK(inp); + } + so = stcb->sctp_socket; + for (m = control->data; m; m = SCTP_BUF_NEXT(m)) { + sctp_sbfree(control, control->stcb, &so->so_rcv, m); + } + m_copydata(control->data, 0, length, buffer); + memset(&rcv, 0, sizeof(struct sctp_rcvinfo)); + rcv.rcv_sid = control->sinfo_stream; + rcv.rcv_ssn = (uint16_t)control->mid; + rcv.rcv_flags = control->sinfo_flags; + rcv.rcv_ppid = control->sinfo_ppid; + rcv.rcv_tsn = control->sinfo_tsn; + rcv.rcv_cumtsn = control->sinfo_cumtsn; + rcv.rcv_context = control->sinfo_context; + rcv.rcv_assoc_id = control->sinfo_assoc_id; + memset(&addr, 0, sizeof(union sctp_sockstore)); + switch (control->whoFrom->ro._l_addr.sa.sa_family) { +#ifdef INET + case AF_INET: + addr.sin = control->whoFrom->ro._l_addr.sin; + break; +#endif +#ifdef INET6 + case AF_INET6: + addr.sin6 = control->whoFrom->ro._l_addr.sin6; + break; +#endif + case AF_CONN: + addr.sconn = control->whoFrom->ro._l_addr.sconn; + break; + default: + addr.sa = control->whoFrom->ro._l_addr.sa; + break; + } + flags = 0; + if (control->end_added == 1) { + flags |= MSG_EOR; + } + if (control->spec_flags & M_NOTIFICATION) { + flags |= MSG_NOTIFICATION; + } + sctp_m_freem(control->data); + control->data = NULL; + control->tail_mbuf = NULL; + control->length = 0; + if (control->end_added) { + TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next); + control->on_read_q = 0; + sctp_free_remote_addr(control->whoFrom); + control->whoFrom = NULL; + sctp_free_a_readq(stcb, control); + } + atomic_add_int(&stcb->asoc.refcnt, 1); + SCTP_TCB_UNLOCK(stcb); + if (inp_read_lock_held == 0) { + SCTP_INP_READ_UNLOCK(inp); + } + inp->recv_callback(so, addr, buffer, length, rcv, flags, inp->ulp_info); + SCTP_TCB_LOCK(stcb); + atomic_subtract_int(&stcb->asoc.refcnt, 1); + } +} +#endif + +void +sctp_add_to_readq(struct sctp_inpcb *inp, + struct sctp_tcb *stcb, + struct sctp_queued_to_read *control, + struct sockbuf *sb, + int end, + int inp_read_lock_held, + int so_locked) +{ + /* + * Here we must place the control on the end of the socket read + * queue AND increment sb_cc so that select will work properly on + * read. + */ + struct mbuf *m, *prev = NULL; + + if (inp == NULL) { + /* Gak, TSNH!! */ +#ifdef INVARIANTS + panic("Gak, inp NULL on add_to_readq"); +#endif + return; + } +#if defined(__APPLE__) && !defined(__Userspace__) + if (so_locked) { + sctp_lock_assert(SCTP_INP_SO(inp)); + } else { + sctp_unlock_assert(SCTP_INP_SO(inp)); + } +#endif + if (inp_read_lock_held == SCTP_READ_LOCK_NOT_HELD) { + SCTP_INP_READ_LOCK(inp); + } + if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_CANT_READ) { + if (!control->on_strm_q) { + sctp_free_remote_addr(control->whoFrom); + if (control->data) { + sctp_m_freem(control->data); + control->data = NULL; + } + sctp_free_a_readq(stcb, control); + } + if (inp_read_lock_held == SCTP_READ_LOCK_NOT_HELD) { + SCTP_INP_READ_UNLOCK(inp); + } + return; + } + if ((control->spec_flags & M_NOTIFICATION) == 0) { + atomic_add_int(&inp->total_recvs, 1); + if (!control->do_not_ref_stcb) { + atomic_add_int(&stcb->total_recvs, 1); + } + } + m = control->data; + control->held_length = 0; + control->length = 0; + while (m != NULL) { + if (SCTP_BUF_LEN(m) == 0) { + /* Skip mbufs with NO length */ + if (prev == NULL) { + /* First one */ + control->data = sctp_m_free(m); + m = control->data; + } else { + SCTP_BUF_NEXT(prev) = sctp_m_free(m); + m = SCTP_BUF_NEXT(prev); + } + if (m == NULL) { + control->tail_mbuf = prev; + } + continue; + } + prev = m; + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) { + sctp_sblog(sb, control->do_not_ref_stcb?NULL:stcb, SCTP_LOG_SBALLOC, SCTP_BUF_LEN(m)); + } + sctp_sballoc(stcb, sb, m); + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) { + sctp_sblog(sb, control->do_not_ref_stcb?NULL:stcb, SCTP_LOG_SBRESULT, 0); + } + atomic_add_int(&control->length, SCTP_BUF_LEN(m)); + m = SCTP_BUF_NEXT(m); + } + if (prev != NULL) { + control->tail_mbuf = prev; + } else { + /* Everything got collapsed out?? */ + if (!control->on_strm_q) { + sctp_free_remote_addr(control->whoFrom); + sctp_free_a_readq(stcb, control); + } + if (inp_read_lock_held == 0) + SCTP_INP_READ_UNLOCK(inp); + return; + } + if (end) { + control->end_added = 1; + } + TAILQ_INSERT_TAIL(&inp->read_queue, control, next); + control->on_read_q = 1; +#if defined(__Userspace__) + sctp_invoke_recv_callback(inp, stcb, control, SCTP_READ_LOCK_HELD); +#endif + if ((inp != NULL) && (inp->sctp_socket != NULL)) { + sctp_wakeup_the_read_socket(inp, stcb, so_locked); + } + if (inp_read_lock_held == SCTP_READ_LOCK_NOT_HELD) { + SCTP_INP_READ_UNLOCK(inp); + } +} + +/*************HOLD THIS COMMENT FOR PATCH FILE OF + *************ALTERNATE ROUTING CODE + */ + +/*************HOLD THIS COMMENT FOR END OF PATCH FILE OF + *************ALTERNATE ROUTING CODE + */ + +struct mbuf * +sctp_generate_cause(uint16_t code, char *info) +{ + struct mbuf *m; + struct sctp_gen_error_cause *cause; + size_t info_len; + uint16_t len; + + if ((code == 0) || (info == NULL)) { + return (NULL); + } + info_len = strlen(info); + if (info_len > (SCTP_MAX_CAUSE_LENGTH - sizeof(struct sctp_paramhdr))) { + return (NULL); + } + len = (uint16_t)(sizeof(struct sctp_paramhdr) + info_len); + m = sctp_get_mbuf_for_msg(len, 0, M_NOWAIT, 1, MT_DATA); + if (m != NULL) { + SCTP_BUF_LEN(m) = len; + cause = mtod(m, struct sctp_gen_error_cause *); + cause->code = htons(code); + cause->length = htons(len); + memcpy(cause->info, info, info_len); + } + return (m); +} + +struct mbuf * +sctp_generate_no_user_data_cause(uint32_t tsn) +{ + struct mbuf *m; + struct sctp_error_no_user_data *no_user_data_cause; + uint16_t len; + + len = (uint16_t)sizeof(struct sctp_error_no_user_data); + m = sctp_get_mbuf_for_msg(len, 0, M_NOWAIT, 1, MT_DATA); + if (m != NULL) { + SCTP_BUF_LEN(m) = len; + no_user_data_cause = mtod(m, struct sctp_error_no_user_data *); + no_user_data_cause->cause.code = htons(SCTP_CAUSE_NO_USER_DATA); + no_user_data_cause->cause.length = htons(len); + no_user_data_cause->tsn = htonl(tsn); + } + return (m); +} + +void +sctp_free_bufspace(struct sctp_tcb *stcb, struct sctp_association *asoc, + struct sctp_tmit_chunk *tp1, int chk_cnt) +{ + if (tp1->data == NULL) { + return; + } + atomic_subtract_int(&asoc->chunks_on_out_queue, chk_cnt); +#ifdef SCTP_MBCNT_LOGGING + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBCNT_LOGGING_ENABLE) { + sctp_log_mbcnt(SCTP_LOG_MBCNT_DECREASE, + asoc->total_output_queue_size, + tp1->book_size, + 0, + tp1->mbcnt); + } +#endif + if (asoc->total_output_queue_size >= tp1->book_size) { + atomic_subtract_int(&asoc->total_output_queue_size, tp1->book_size); + } else { + asoc->total_output_queue_size = 0; + } + if ((stcb->sctp_socket != NULL) && + (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) || + ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)))) { + if (stcb->sctp_socket->so_snd.sb_cc >= tp1->book_size) { + atomic_subtract_int(&((stcb)->sctp_socket->so_snd.sb_cc), tp1->book_size); + } else { + stcb->sctp_socket->so_snd.sb_cc = 0; + } + } +} + +int +sctp_release_pr_sctp_chunk(struct sctp_tcb *stcb, struct sctp_tmit_chunk *tp1, + uint8_t sent, int so_locked) +{ + struct sctp_stream_out *strq; + struct sctp_tmit_chunk *chk = NULL, *tp2; + struct sctp_stream_queue_pending *sp; + uint32_t mid; + uint16_t sid; + uint8_t foundeom = 0; + int ret_sz = 0; + int notdone; + int do_wakeup_routine = 0; + +#if defined(__APPLE__) && !defined(__Userspace__) + if (so_locked) { + sctp_lock_assert(SCTP_INP_SO(stcb->sctp_ep)); + } else { + sctp_unlock_assert(SCTP_INP_SO(stcb->sctp_ep)); + } +#endif + SCTP_TCB_LOCK_ASSERT(stcb); + + sid = tp1->rec.data.sid; + mid = tp1->rec.data.mid; + if (sent || ((tp1->rec.data.rcv_flags & SCTP_DATA_FIRST_FRAG) == 0)) { + stcb->asoc.abandoned_sent[0]++; + stcb->asoc.abandoned_sent[PR_SCTP_POLICY(tp1->flags)]++; + stcb->asoc.strmout[sid].abandoned_sent[0]++; +#if defined(SCTP_DETAILED_STR_STATS) + stcb->asoc.strmout[sid].abandoned_sent[PR_SCTP_POLICY(tp1->flags)]++; +#endif + } else { + stcb->asoc.abandoned_unsent[0]++; + stcb->asoc.abandoned_unsent[PR_SCTP_POLICY(tp1->flags)]++; + stcb->asoc.strmout[sid].abandoned_unsent[0]++; +#if defined(SCTP_DETAILED_STR_STATS) + stcb->asoc.strmout[sid].abandoned_unsent[PR_SCTP_POLICY(tp1->flags)]++; +#endif + } + do { + ret_sz += tp1->book_size; + if (tp1->data != NULL) { + if (tp1->sent < SCTP_DATAGRAM_RESEND) { + sctp_flight_size_decrease(tp1); + sctp_total_flight_decrease(stcb, tp1); + } + sctp_free_bufspace(stcb, &stcb->asoc, tp1, 1); + stcb->asoc.peers_rwnd += tp1->send_size; + stcb->asoc.peers_rwnd += SCTP_BASE_SYSCTL(sctp_peer_chunk_oh); + if (sent) { + sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 0, tp1, so_locked); + } else { + sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 0, tp1, so_locked); + } + if (tp1->data) { + sctp_m_freem(tp1->data); + tp1->data = NULL; + } + do_wakeup_routine = 1; + if (PR_SCTP_BUF_ENABLED(tp1->flags)) { + stcb->asoc.sent_queue_cnt_removeable--; + } + } + tp1->sent = SCTP_FORWARD_TSN_SKIP; + if ((tp1->rec.data.rcv_flags & SCTP_DATA_NOT_FRAG) == + SCTP_DATA_NOT_FRAG) { + /* not frag'ed we ae done */ + notdone = 0; + foundeom = 1; + } else if (tp1->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) { + /* end of frag, we are done */ + notdone = 0; + foundeom = 1; + } else { + /* + * Its a begin or middle piece, we must mark all of + * it + */ + notdone = 1; + tp1 = TAILQ_NEXT(tp1, sctp_next); + } + } while (tp1 && notdone); + if (foundeom == 0) { + /* + * The multi-part message was scattered across the send and + * sent queue. + */ + TAILQ_FOREACH_SAFE(tp1, &stcb->asoc.send_queue, sctp_next, tp2) { + if ((tp1->rec.data.sid != sid) || + (!SCTP_MID_EQ(stcb->asoc.idata_supported, tp1->rec.data.mid, mid))) { + break; + } + /* save to chk in case we have some on stream out + * queue. If so and we have an un-transmitted one + * we don't have to fudge the TSN. + */ + chk = tp1; + ret_sz += tp1->book_size; + sctp_free_bufspace(stcb, &stcb->asoc, tp1, 1); + if (sent) { + sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 0, tp1, so_locked); + } else { + sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 0, tp1, so_locked); + } + if (tp1->data) { + sctp_m_freem(tp1->data); + tp1->data = NULL; + } + /* No flight involved here book the size to 0 */ + tp1->book_size = 0; + if (tp1->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) { + foundeom = 1; + } + do_wakeup_routine = 1; + tp1->sent = SCTP_FORWARD_TSN_SKIP; + TAILQ_REMOVE(&stcb->asoc.send_queue, tp1, sctp_next); + /* on to the sent queue so we can wait for it to be passed by. */ + TAILQ_INSERT_TAIL(&stcb->asoc.sent_queue, tp1, + sctp_next); + stcb->asoc.send_queue_cnt--; + stcb->asoc.sent_queue_cnt++; + } + } + if (foundeom == 0) { + /* + * Still no eom found. That means there + * is stuff left on the stream out queue.. yuck. + */ + strq = &stcb->asoc.strmout[sid]; + sp = TAILQ_FIRST(&strq->outqueue); + if (sp != NULL) { + sp->discard_rest = 1; + /* + * We may need to put a chunk on the + * queue that holds the TSN that + * would have been sent with the LAST + * bit. + */ + if (chk == NULL) { + /* Yep, we have to */ + sctp_alloc_a_chunk(stcb, chk); + if (chk == NULL) { + /* we are hosed. All we can + * do is nothing.. which will + * cause an abort if the peer is + * paying attention. + */ + goto oh_well; + } + memset(chk, 0, sizeof(*chk)); + chk->rec.data.rcv_flags = 0; + chk->sent = SCTP_FORWARD_TSN_SKIP; + chk->asoc = &stcb->asoc; + if (stcb->asoc.idata_supported == 0) { + if (sp->sinfo_flags & SCTP_UNORDERED) { + chk->rec.data.mid = 0; + } else { + chk->rec.data.mid = strq->next_mid_ordered; + } + } else { + if (sp->sinfo_flags & SCTP_UNORDERED) { + chk->rec.data.mid = strq->next_mid_unordered; + } else { + chk->rec.data.mid = strq->next_mid_ordered; + } + } + chk->rec.data.sid = sp->sid; + chk->rec.data.ppid = sp->ppid; + chk->rec.data.context = sp->context; + chk->flags = sp->act_flags; + chk->whoTo = NULL; +#if defined(__FreeBSD__) && !defined(__Userspace__) + chk->rec.data.tsn = atomic_fetchadd_int(&stcb->asoc.sending_seq, 1); +#else + chk->rec.data.tsn = stcb->asoc.sending_seq++; +#endif + strq->chunks_on_queues++; + TAILQ_INSERT_TAIL(&stcb->asoc.sent_queue, chk, sctp_next); + stcb->asoc.sent_queue_cnt++; + stcb->asoc.pr_sctp_cnt++; + } + chk->rec.data.rcv_flags |= SCTP_DATA_LAST_FRAG; + if (sp->sinfo_flags & SCTP_UNORDERED) { + chk->rec.data.rcv_flags |= SCTP_DATA_UNORDERED; + } + if (stcb->asoc.idata_supported == 0) { + if ((sp->sinfo_flags & SCTP_UNORDERED) == 0) { + strq->next_mid_ordered++; + } + } else { + if (sp->sinfo_flags & SCTP_UNORDERED) { + strq->next_mid_unordered++; + } else { + strq->next_mid_ordered++; + } + } + oh_well: + if (sp->data) { + /* Pull any data to free up the SB and + * allow sender to "add more" while we + * will throw away :-) + */ + sctp_free_spbufspace(stcb, &stcb->asoc, sp); + ret_sz += sp->length; + do_wakeup_routine = 1; + sp->some_taken = 1; + sctp_m_freem(sp->data); + sp->data = NULL; + sp->tail_mbuf = NULL; + sp->length = 0; + } + } + } + if (do_wakeup_routine) { +#if defined(__APPLE__) && !defined(__Userspace__) + struct socket *so; + + so = SCTP_INP_SO(stcb->sctp_ep); + if (!so_locked) { + atomic_add_int(&stcb->asoc.refcnt, 1); + SCTP_TCB_UNLOCK(stcb); + SCTP_SOCKET_LOCK(so, 1); + SCTP_TCB_LOCK(stcb); + atomic_subtract_int(&stcb->asoc.refcnt, 1); + if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) { + /* assoc was freed while we were unlocked */ + SCTP_SOCKET_UNLOCK(so, 1); + return (ret_sz); + } + } +#endif + sctp_sowwakeup(stcb->sctp_ep, stcb->sctp_socket); +#if defined(__APPLE__) && !defined(__Userspace__) + if (!so_locked) { + SCTP_SOCKET_UNLOCK(so, 1); + } +#endif + } + return (ret_sz); +} + +/* + * checks to see if the given address, sa, is one that is currently known by + * the kernel note: can't distinguish the same address on multiple interfaces + * and doesn't handle multiple addresses with different zone/scope id's note: + * ifa_ifwithaddr() compares the entire sockaddr struct + */ +struct sctp_ifa * +sctp_find_ifa_in_ep(struct sctp_inpcb *inp, struct sockaddr *addr, + int holds_lock) +{ + struct sctp_laddr *laddr; + + if (holds_lock == 0) { + SCTP_INP_RLOCK(inp); + } + + LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { + if (laddr->ifa == NULL) + continue; + if (addr->sa_family != laddr->ifa->address.sa.sa_family) + continue; +#ifdef INET + if (addr->sa_family == AF_INET) { + if (((struct sockaddr_in *)addr)->sin_addr.s_addr == + laddr->ifa->address.sin.sin_addr.s_addr) { + /* found him. */ + break; + } + } +#endif +#ifdef INET6 + if (addr->sa_family == AF_INET6) { + if (SCTP6_ARE_ADDR_EQUAL((struct sockaddr_in6 *)addr, + &laddr->ifa->address.sin6)) { + /* found him. */ + break; + } + } +#endif +#if defined(__Userspace__) + if (addr->sa_family == AF_CONN) { + if (((struct sockaddr_conn *)addr)->sconn_addr == laddr->ifa->address.sconn.sconn_addr) { + /* found him. */ + break; + } + } +#endif + } + if (holds_lock == 0) { + SCTP_INP_RUNLOCK(inp); + } + if (laddr != NULL) { + return (laddr->ifa); + } else { + return (NULL); + } +} + +uint32_t +sctp_get_ifa_hash_val(struct sockaddr *addr) +{ + switch (addr->sa_family) { +#ifdef INET + case AF_INET: + { + struct sockaddr_in *sin; + + sin = (struct sockaddr_in *)addr; + return (sin->sin_addr.s_addr ^ (sin->sin_addr.s_addr >> 16)); + } +#endif +#ifdef INET6 + case AF_INET6: + { + struct sockaddr_in6 *sin6; + uint32_t hash_of_addr; + + sin6 = (struct sockaddr_in6 *)addr; +#if !defined(_WIN32) && !(defined(__FreeBSD__) && defined(__Userspace__)) && !defined(__APPLE__) + hash_of_addr = (sin6->sin6_addr.s6_addr32[0] + + sin6->sin6_addr.s6_addr32[1] + + sin6->sin6_addr.s6_addr32[2] + + sin6->sin6_addr.s6_addr32[3]); +#else + hash_of_addr = (((uint32_t *)&sin6->sin6_addr)[0] + + ((uint32_t *)&sin6->sin6_addr)[1] + + ((uint32_t *)&sin6->sin6_addr)[2] + + ((uint32_t *)&sin6->sin6_addr)[3]); +#endif + hash_of_addr = (hash_of_addr ^ (hash_of_addr >> 16)); + return (hash_of_addr); + } +#endif +#if defined(__Userspace__) + case AF_CONN: + { + struct sockaddr_conn *sconn; + uintptr_t temp; + + sconn = (struct sockaddr_conn *)addr; + temp = (uintptr_t)sconn->sconn_addr; + return ((uint32_t)(temp ^ (temp >> 16))); + } +#endif + default: + break; + } + return (0); +} + +struct sctp_ifa * +sctp_find_ifa_by_addr(struct sockaddr *addr, uint32_t vrf_id, int holds_lock) +{ + struct sctp_ifa *sctp_ifap; + struct sctp_vrf *vrf; + struct sctp_ifalist *hash_head; + uint32_t hash_of_addr; + + if (holds_lock == 0) { + SCTP_IPI_ADDR_RLOCK(); + } else { + SCTP_IPI_ADDR_LOCK_ASSERT(); + } + + vrf = sctp_find_vrf(vrf_id); + if (vrf == NULL) { + if (holds_lock == 0) + SCTP_IPI_ADDR_RUNLOCK(); + return (NULL); + } + + hash_of_addr = sctp_get_ifa_hash_val(addr); + + hash_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; + if (hash_head == NULL) { + SCTP_PRINTF("hash_of_addr:%x mask:%x table:%x - ", + hash_of_addr, (uint32_t)vrf->vrf_addr_hashmark, + (uint32_t)(hash_of_addr & vrf->vrf_addr_hashmark)); + sctp_print_address(addr); + SCTP_PRINTF("No such bucket for address\n"); + if (holds_lock == 0) + SCTP_IPI_ADDR_RUNLOCK(); + + return (NULL); + } + LIST_FOREACH(sctp_ifap, hash_head, next_bucket) { + if (addr->sa_family != sctp_ifap->address.sa.sa_family) + continue; +#ifdef INET + if (addr->sa_family == AF_INET) { + if (((struct sockaddr_in *)addr)->sin_addr.s_addr == + sctp_ifap->address.sin.sin_addr.s_addr) { + /* found him. */ + break; + } + } +#endif +#ifdef INET6 + if (addr->sa_family == AF_INET6) { + if (SCTP6_ARE_ADDR_EQUAL((struct sockaddr_in6 *)addr, + &sctp_ifap->address.sin6)) { + /* found him. */ + break; + } + } +#endif +#if defined(__Userspace__) + if (addr->sa_family == AF_CONN) { + if (((struct sockaddr_conn *)addr)->sconn_addr == sctp_ifap->address.sconn.sconn_addr) { + /* found him. */ + break; + } + } +#endif + } + if (holds_lock == 0) + SCTP_IPI_ADDR_RUNLOCK(); + return (sctp_ifap); +} + +static void +sctp_user_rcvd(struct sctp_tcb *stcb, uint32_t *freed_so_far, int hold_rlock, + uint32_t rwnd_req) +{ + /* User pulled some data, do we need a rwnd update? */ +#if defined(__FreeBSD__) && !defined(__Userspace__) + struct epoch_tracker et; +#endif + int r_unlocked = 0; + uint32_t dif, rwnd; + struct socket *so = NULL; + + if (stcb == NULL) + return; + + atomic_add_int(&stcb->asoc.refcnt, 1); + + if ((SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) || + (stcb->asoc.state & (SCTP_STATE_ABOUT_TO_BE_FREED | SCTP_STATE_SHUTDOWN_RECEIVED))) { + /* Pre-check If we are freeing no update */ + goto no_lock; + } + SCTP_INP_INCR_REF(stcb->sctp_ep); + if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) || + (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { + goto out; + } + so = stcb->sctp_socket; + if (so == NULL) { + goto out; + } + atomic_add_int(&stcb->freed_by_sorcv_sincelast, *freed_so_far); + /* Have you have freed enough to look */ + *freed_so_far = 0; + /* Yep, its worth a look and the lock overhead */ + + /* Figure out what the rwnd would be */ + rwnd = sctp_calc_rwnd(stcb, &stcb->asoc); + if (rwnd >= stcb->asoc.my_last_reported_rwnd) { + dif = rwnd - stcb->asoc.my_last_reported_rwnd; + } else { + dif = 0; + } + if (dif >= rwnd_req) { + if (hold_rlock) { + SCTP_INP_READ_UNLOCK(stcb->sctp_ep); + r_unlocked = 1; + } + if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { + /* + * One last check before we allow the guy possibly + * to get in. There is a race, where the guy has not + * reached the gate. In that case + */ + goto out; + } + SCTP_TCB_LOCK(stcb); + if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { + /* No reports here */ + SCTP_TCB_UNLOCK(stcb); + goto out; + } + SCTP_STAT_INCR(sctps_wu_sacks_sent); +#if defined(__FreeBSD__) && !defined(__Userspace__) + NET_EPOCH_ENTER(et); +#endif + sctp_send_sack(stcb, SCTP_SO_LOCKED); + + sctp_chunk_output(stcb->sctp_ep, stcb, + SCTP_OUTPUT_FROM_USR_RCVD, SCTP_SO_LOCKED); + /* make sure no timer is running */ +#if defined(__FreeBSD__) && !defined(__Userspace__) + NET_EPOCH_EXIT(et); +#endif + sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL, + SCTP_FROM_SCTPUTIL + SCTP_LOC_6); + SCTP_TCB_UNLOCK(stcb); + } else { + /* Update how much we have pending */ + stcb->freed_by_sorcv_sincelast = dif; + } + out: + if (so && r_unlocked && hold_rlock) { + SCTP_INP_READ_LOCK(stcb->sctp_ep); + } + + SCTP_INP_DECR_REF(stcb->sctp_ep); + no_lock: + atomic_subtract_int(&stcb->asoc.refcnt, 1); + return; +} + +int +sctp_sorecvmsg(struct socket *so, + struct uio *uio, + struct mbuf **mp, + struct sockaddr *from, + int fromlen, + int *msg_flags, + struct sctp_sndrcvinfo *sinfo, + int filling_sinfo) +{ + /* + * MSG flags we will look at MSG_DONTWAIT - non-blocking IO. + * MSG_PEEK - Look don't touch :-D (only valid with OUT mbuf copy + * mp=NULL thus uio is the copy method to userland) MSG_WAITALL - ?? + * On the way out we may send out any combination of: + * MSG_NOTIFICATION MSG_EOR + * + */ + struct sctp_inpcb *inp = NULL; + ssize_t my_len = 0; + ssize_t cp_len = 0; + int error = 0; + struct sctp_queued_to_read *control = NULL, *ctl = NULL, *nxt = NULL; + struct mbuf *m = NULL; + struct sctp_tcb *stcb = NULL; + int wakeup_read_socket = 0; + int freecnt_applied = 0; + int out_flags = 0, in_flags = 0; + int block_allowed = 1; + uint32_t freed_so_far = 0; + ssize_t copied_so_far = 0; + int in_eeor_mode = 0; + int no_rcv_needed = 0; + uint32_t rwnd_req = 0; + int hold_sblock = 0; + int hold_rlock = 0; + ssize_t slen = 0; + uint32_t held_length = 0; +#if defined(__FreeBSD__) && !defined(__Userspace__) + int sockbuf_lock = 0; +#endif + + if (uio == NULL) { + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL); + return (EINVAL); + } + + if (msg_flags) { + in_flags = *msg_flags; + if (in_flags & MSG_PEEK) + SCTP_STAT_INCR(sctps_read_peeks); + } else { + in_flags = 0; + } +#if defined(__APPLE__) && !defined(__Userspace__) +#if defined(APPLE_LEOPARD) + slen = uio->uio_resid; +#else + slen = uio_resid(uio); +#endif +#else + slen = uio->uio_resid; +#endif + + /* Pull in and set up our int flags */ + if (in_flags & MSG_OOB) { + /* Out of band's NOT supported */ + return (EOPNOTSUPP); + } + if ((in_flags & MSG_PEEK) && (mp != NULL)) { + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL); + return (EINVAL); + } + if ((in_flags & (MSG_DONTWAIT +#if defined(__FreeBSD__) && !defined(__Userspace__) + | MSG_NBIO +#endif + )) || + SCTP_SO_IS_NBIO(so)) { + block_allowed = 0; + } + /* setup the endpoint */ + inp = (struct sctp_inpcb *)so->so_pcb; + if (inp == NULL) { + SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTPUTIL, EFAULT); + return (EFAULT); + } + rwnd_req = (SCTP_SB_LIMIT_RCV(so) >> SCTP_RWND_HIWAT_SHIFT); + /* Must be at least a MTU's worth */ + if (rwnd_req < SCTP_MIN_RWND) + rwnd_req = SCTP_MIN_RWND; + in_eeor_mode = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR); + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_RECV_RWND_LOGGING_ENABLE) { +#if defined(__APPLE__) && !defined(__Userspace__) +#if defined(APPLE_LEOPARD) + sctp_misc_ints(SCTP_SORECV_ENTER, + rwnd_req, in_eeor_mode, SCTP_SBAVAIL(&so->so_rcv), uio->uio_resid); +#else + sctp_misc_ints(SCTP_SORECV_ENTER, + rwnd_req, in_eeor_mode, SCTP_SBAVAIL(&so->so_rcv), uio_resid(uio)); +#endif +#else + sctp_misc_ints(SCTP_SORECV_ENTER, + rwnd_req, in_eeor_mode, SCTP_SBAVAIL(&so->so_rcv), (uint32_t)uio->uio_resid); +#endif + } +#if defined(__Userspace__) + SOCKBUF_LOCK(&so->so_rcv); + hold_sblock = 1; +#endif + if (SCTP_BASE_SYSCTL(sctp_logging_level) &SCTP_RECV_RWND_LOGGING_ENABLE) { +#if defined(__APPLE__) && !defined(__Userspace__) +#if defined(APPLE_LEOPARD) + sctp_misc_ints(SCTP_SORECV_ENTERPL, + rwnd_req, block_allowed, SCTP_SBAVAIL(&so->so_rcv), uio->uio_resid); +#else + sctp_misc_ints(SCTP_SORECV_ENTERPL, + rwnd_req, block_allowed, SCTP_SBAVAIL(&so->so_rcv), uio_resid(uio)); +#endif +#else + sctp_misc_ints(SCTP_SORECV_ENTERPL, + rwnd_req, block_allowed, SCTP_SBAVAIL(&so->so_rcv), (uint32_t)uio->uio_resid); +#endif + } + +#if defined(__APPLE__) && !defined(__Userspace__) + error = sblock(&so->so_rcv, SBLOCKWAIT(in_flags)); +#endif +#if defined(__FreeBSD__) && !defined(__Userspace__) + error = SOCK_IO_RECV_LOCK(so, SBLOCKWAIT(in_flags)); +#endif + if (error) { + goto release_unlocked; + } +#if defined(__FreeBSD__) && !defined(__Userspace__) + sockbuf_lock = 1; +#endif + restart: +#if defined(__Userspace__) + if (hold_sblock == 0) { + SOCKBUF_LOCK(&so->so_rcv); + hold_sblock = 1; + } +#endif +#if defined(__APPLE__) && !defined(__Userspace__) + sbunlock(&so->so_rcv, 1); +#endif + + restart_nosblocks: + if (hold_sblock == 0) { + SOCKBUF_LOCK(&so->so_rcv); + hold_sblock = 1; + } + if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) || + (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { + goto out; + } +#if (defined(__FreeBSD__) || defined(_WIN32)) && !defined(__Userspace__) + if ((so->so_rcv.sb_state & SBS_CANTRCVMORE) && SCTP_SBAVAIL(&so->so_rcv) == 0) { +#else + if ((so->so_state & SS_CANTRCVMORE) && SCTP_SBAVAIL(&so->so_rcv) == 0) { +#endif + if (so->so_error) { + error = so->so_error; + if ((in_flags & MSG_PEEK) == 0) + so->so_error = 0; + goto out; + } else { + if (SCTP_SBAVAIL(&so->so_rcv) == 0) { + /* indicate EOF */ + error = 0; + goto out; + } + } + } + if (SCTP_SBAVAIL(&so->so_rcv) <= held_length) { + if (so->so_error) { + error = so->so_error; + if ((in_flags & MSG_PEEK) == 0) { + so->so_error = 0; + } + goto out; + } + if ((SCTP_SBAVAIL(&so->so_rcv) == 0) && + ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || + (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) { + if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0) { + /* For active open side clear flags for re-use + * passive open is blocked by connect. + */ + if (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED) { + /* You were aborted, passive side always hits here */ + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, ECONNRESET); + error = ECONNRESET; + } + so->so_state &= ~(SS_ISCONNECTING | + SS_ISDISCONNECTING | + SS_ISCONFIRMING | + SS_ISCONNECTED); + if (error == 0) { + if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) == 0) { + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, ENOTCONN); + error = ENOTCONN; + } + } + goto out; + } + } + if (block_allowed) { +#if defined(__FreeBSD__) && !defined(__Userspace__) + error = sbwait(so, SO_RCV); +#else + error = sbwait(&so->so_rcv); +#endif + if (error) { + goto out; + } + held_length = 0; + goto restart_nosblocks; + } else { + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EWOULDBLOCK); + error = EWOULDBLOCK; + goto out; + } + } + if (hold_sblock == 1) { + SOCKBUF_UNLOCK(&so->so_rcv); + hold_sblock = 0; + } +#if defined(__APPLE__) && !defined(__Userspace__) + error = sblock(&so->so_rcv, SBLOCKWAIT(in_flags)); +#endif + /* we possibly have data we can read */ + /*sa_ignore FREED_MEMORY*/ + control = TAILQ_FIRST(&inp->read_queue); + if (control == NULL) { + /* This could be happening since + * the appender did the increment but as not + * yet did the tailq insert onto the read_queue + */ + if (hold_rlock == 0) { + SCTP_INP_READ_LOCK(inp); + } + control = TAILQ_FIRST(&inp->read_queue); + if ((control == NULL) && (SCTP_SBAVAIL(&so->so_rcv) > 0)) { +#ifdef INVARIANTS + panic("Huh, its non zero and nothing on control?"); +#endif + SCTP_SB_CLEAR(so->so_rcv); + } + SCTP_INP_READ_UNLOCK(inp); + hold_rlock = 0; + goto restart; + } + + if ((control->length == 0) && + (control->do_not_ref_stcb)) { + /* Clean up code for freeing assoc that left behind a pdapi.. + * maybe a peer in EEOR that just closed after sending and + * never indicated a EOR. + */ + if (hold_rlock == 0) { + hold_rlock = 1; + SCTP_INP_READ_LOCK(inp); + } + control->held_length = 0; + if (control->data) { + /* Hmm there is data here .. fix */ + struct mbuf *m_tmp; + int cnt = 0; + m_tmp = control->data; + while (m_tmp) { + cnt += SCTP_BUF_LEN(m_tmp); + if (SCTP_BUF_NEXT(m_tmp) == NULL) { + control->tail_mbuf = m_tmp; + control->end_added = 1; + } + m_tmp = SCTP_BUF_NEXT(m_tmp); + } + control->length = cnt; + } else { + /* remove it */ + TAILQ_REMOVE(&inp->read_queue, control, next); + /* Add back any hidden data */ + sctp_free_remote_addr(control->whoFrom); + sctp_free_a_readq(stcb, control); + } + if (hold_rlock) { + hold_rlock = 0; + SCTP_INP_READ_UNLOCK(inp); + } + goto restart; + } + if ((control->length == 0) && + (control->end_added == 1)) { + /* Do we also need to check for (control->pdapi_aborted == 1)? */ + if (hold_rlock == 0) { + hold_rlock = 1; + SCTP_INP_READ_LOCK(inp); + } + TAILQ_REMOVE(&inp->read_queue, control, next); + if (control->data) { +#ifdef INVARIANTS + panic("control->data not null but control->length == 0"); +#else + SCTP_PRINTF("Strange, data left in the control buffer. Cleaning up.\n"); + sctp_m_freem(control->data); + control->data = NULL; +#endif + } + if (control->aux_data) { + sctp_m_free (control->aux_data); + control->aux_data = NULL; + } +#ifdef INVARIANTS + if (control->on_strm_q) { + panic("About to free ctl:%p so:%p and its in %d", + control, so, control->on_strm_q); + } +#endif + sctp_free_remote_addr(control->whoFrom); + sctp_free_a_readq(stcb, control); + if (hold_rlock) { + hold_rlock = 0; + SCTP_INP_READ_UNLOCK(inp); + } + goto restart; + } + if (control->length == 0) { + if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE)) && + (filling_sinfo)) { + /* find a more suitable one then this */ + ctl = TAILQ_NEXT(control, next); + while (ctl) { + if ((ctl->stcb != control->stcb) && (ctl->length) && + (ctl->some_taken || + (ctl->spec_flags & M_NOTIFICATION) || + ((ctl->do_not_ref_stcb == 0) && + (ctl->stcb->asoc.strmin[ctl->sinfo_stream].delivery_started == 0))) + ) { + /*- + * If we have a different TCB next, and there is data + * present. If we have already taken some (pdapi), OR we can + * ref the tcb and no delivery as started on this stream, we + * take it. Note we allow a notification on a different + * assoc to be delivered.. + */ + control = ctl; + goto found_one; + } else if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS)) && + (ctl->length) && + ((ctl->some_taken) || + ((ctl->do_not_ref_stcb == 0) && + ((ctl->spec_flags & M_NOTIFICATION) == 0) && + (ctl->stcb->asoc.strmin[ctl->sinfo_stream].delivery_started == 0)))) { + /*- + * If we have the same tcb, and there is data present, and we + * have the strm interleave feature present. Then if we have + * taken some (pdapi) or we can refer to tht tcb AND we have + * not started a delivery for this stream, we can take it. + * Note we do NOT allow a notification on the same assoc to + * be delivered. + */ + control = ctl; + goto found_one; + } + ctl = TAILQ_NEXT(ctl, next); + } + } + /* + * if we reach here, not suitable replacement is available + * <or> fragment interleave is NOT on. So stuff the sb_cc + * into the our held count, and its time to sleep again. + */ + held_length = SCTP_SBAVAIL(&so->so_rcv); + control->held_length = SCTP_SBAVAIL(&so->so_rcv); + goto restart; + } + /* Clear the held length since there is something to read */ + control->held_length = 0; + found_one: + /* + * If we reach here, control has a some data for us to read off. + * Note that stcb COULD be NULL. + */ + if (hold_rlock == 0) { + hold_rlock = 1; + SCTP_INP_READ_LOCK(inp); + } + control->some_taken++; + stcb = control->stcb; + if (stcb) { + if ((control->do_not_ref_stcb == 0) && + (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED)) { + if (freecnt_applied == 0) + stcb = NULL; + } else if (control->do_not_ref_stcb == 0) { + /* you can't free it on me please */ + /* + * The lock on the socket buffer protects us so the + * free code will stop. But since we used the socketbuf + * lock and the sender uses the tcb_lock to increment, + * we need to use the atomic add to the refcnt + */ + if (freecnt_applied) { +#ifdef INVARIANTS + panic("refcnt already incremented"); +#else + SCTP_PRINTF("refcnt already incremented?\n"); +#endif + } else { + atomic_add_int(&stcb->asoc.refcnt, 1); + freecnt_applied = 1; + } + /* + * Setup to remember how much we have not yet told + * the peer our rwnd has opened up. Note we grab + * the value from the tcb from last time. + * Note too that sack sending clears this when a sack + * is sent, which is fine. Once we hit the rwnd_req, + * we then will go to the sctp_user_rcvd() that will + * not lock until it KNOWs it MUST send a WUP-SACK. + */ + freed_so_far = (uint32_t)stcb->freed_by_sorcv_sincelast; + stcb->freed_by_sorcv_sincelast = 0; + } + } + if (stcb && + ((control->spec_flags & M_NOTIFICATION) == 0) && + control->do_not_ref_stcb == 0) { + stcb->asoc.strmin[control->sinfo_stream].delivery_started = 1; + } + + /* First lets get off the sinfo and sockaddr info */ + if ((sinfo != NULL) && (filling_sinfo != 0)) { + sinfo->sinfo_stream = control->sinfo_stream; + sinfo->sinfo_ssn = (uint16_t)control->mid; + sinfo->sinfo_flags = control->sinfo_flags; + sinfo->sinfo_ppid = control->sinfo_ppid; + sinfo->sinfo_context =control->sinfo_context; + sinfo->sinfo_timetolive = control->sinfo_timetolive; + sinfo->sinfo_tsn = control->sinfo_tsn; + sinfo->sinfo_cumtsn = control->sinfo_cumtsn; + sinfo->sinfo_assoc_id = control->sinfo_assoc_id; + nxt = TAILQ_NEXT(control, next); + if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXT_RCVINFO) || + sctp_is_feature_on(inp, SCTP_PCB_FLAGS_RECVNXTINFO)) { + struct sctp_extrcvinfo *s_extra; + s_extra = (struct sctp_extrcvinfo *)sinfo; + if ((nxt) && + (nxt->length)) { + s_extra->serinfo_next_flags = SCTP_NEXT_MSG_AVAIL; + if (nxt->sinfo_flags & SCTP_UNORDERED) { + s_extra->serinfo_next_flags |= SCTP_NEXT_MSG_IS_UNORDERED; + } + if (nxt->spec_flags & M_NOTIFICATION) { + s_extra->serinfo_next_flags |= SCTP_NEXT_MSG_IS_NOTIFICATION; + } + s_extra->serinfo_next_aid = nxt->sinfo_assoc_id; + s_extra->serinfo_next_length = nxt->length; + s_extra->serinfo_next_ppid = nxt->sinfo_ppid; + s_extra->serinfo_next_stream = nxt->sinfo_stream; + if (nxt->tail_mbuf != NULL) { + if (nxt->end_added) { + s_extra->serinfo_next_flags |= SCTP_NEXT_MSG_ISCOMPLETE; + } + } + } else { + /* we explicitly 0 this, since the memcpy got + * some other things beyond the older sinfo_ + * that is on the control's structure :-D + */ + nxt = NULL; + s_extra->serinfo_next_flags = SCTP_NO_NEXT_MSG; + s_extra->serinfo_next_aid = 0; + s_extra->serinfo_next_length = 0; + s_extra->serinfo_next_ppid = 0; + s_extra->serinfo_next_stream = 0; + } + } + /* + * update off the real current cum-ack, if we have an stcb. + */ + if ((control->do_not_ref_stcb == 0) && stcb) + sinfo->sinfo_cumtsn = stcb->asoc.cumulative_tsn; + /* + * mask off the high bits, we keep the actual chunk bits in + * there. + */ + sinfo->sinfo_flags &= 0x00ff; + if ((control->sinfo_flags >> 8) & SCTP_DATA_UNORDERED) { + sinfo->sinfo_flags |= SCTP_UNORDERED; + } + } +#ifdef SCTP_ASOCLOG_OF_TSNS + { + int index, newindex; + struct sctp_pcbtsn_rlog *entry; + do { + index = inp->readlog_index; + newindex = index + 1; + if (newindex >= SCTP_READ_LOG_SIZE) { + newindex = 0; + } + } while (atomic_cmpset_int(&inp->readlog_index, index, newindex) == 0); + entry = &inp->readlog[index]; + entry->vtag = control->sinfo_assoc_id; + entry->strm = control->sinfo_stream; + entry->seq = (uint16_t)control->mid; + entry->sz = control->length; + entry->flgs = control->sinfo_flags; + } +#endif + if ((fromlen > 0) && (from != NULL)) { + union sctp_sockstore store; + size_t len; + + switch (control->whoFrom->ro._l_addr.sa.sa_family) { +#ifdef INET6 + case AF_INET6: + len = sizeof(struct sockaddr_in6); + store.sin6 = control->whoFrom->ro._l_addr.sin6; + store.sin6.sin6_port = control->port_from; + break; +#endif +#ifdef INET + case AF_INET: +#ifdef INET6 + if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NEEDS_MAPPED_V4)) { + len = sizeof(struct sockaddr_in6); + in6_sin_2_v4mapsin6(&control->whoFrom->ro._l_addr.sin, + &store.sin6); + store.sin6.sin6_port = control->port_from; + } else { + len = sizeof(struct sockaddr_in); + store.sin = control->whoFrom->ro._l_addr.sin; + store.sin.sin_port = control->port_from; + } +#else + len = sizeof(struct sockaddr_in); + store.sin = control->whoFrom->ro._l_addr.sin; + store.sin.sin_port = control->port_from; +#endif + break; +#endif +#if defined(__Userspace__) + case AF_CONN: + len = sizeof(struct sockaddr_conn); + store.sconn = control->whoFrom->ro._l_addr.sconn; + store.sconn.sconn_port = control->port_from; + break; +#endif + default: + len = 0; + break; + } + memcpy(from, &store, min((size_t)fromlen, len)); +#if defined(SCTP_EMBEDDED_V6_SCOPE) +#ifdef INET6 + { + struct sockaddr_in6 lsa6, *from6; + + from6 = (struct sockaddr_in6 *)from; + sctp_recover_scope_mac(from6, (&lsa6)); + } +#endif +#endif + } + if (hold_rlock) { + SCTP_INP_READ_UNLOCK(inp); + hold_rlock = 0; + } + if (hold_sblock) { + SOCKBUF_UNLOCK(&so->so_rcv); + hold_sblock = 0; + } + /* now copy out what data we can */ + if (mp == NULL) { + /* copy out each mbuf in the chain up to length */ + get_more_data: + m = control->data; + while (m) { + /* Move out all we can */ +#if defined(__APPLE__) && !defined(__Userspace__) +#if defined(APPLE_LEOPARD) + cp_len = uio->uio_resid; +#else + cp_len = uio_resid(uio); +#endif +#else + cp_len = uio->uio_resid; +#endif + my_len = SCTP_BUF_LEN(m); + if (cp_len > my_len) { + /* not enough in this buf */ + cp_len = my_len; + } + if (hold_rlock) { + SCTP_INP_READ_UNLOCK(inp); + hold_rlock = 0; + } +#if defined(__APPLE__) && !defined(__Userspace__) + SCTP_SOCKET_UNLOCK(so, 0); +#endif + if (cp_len > 0) + error = uiomove(mtod(m, char *), (int)cp_len, uio); +#if defined(__APPLE__) && !defined(__Userspace__) + SCTP_SOCKET_LOCK(so, 0); +#endif + /* re-read */ + if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { + goto release; + } + + if ((control->do_not_ref_stcb == 0) && stcb && + stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { + no_rcv_needed = 1; + } + if (error) { + /* error we are out of here */ + goto release; + } + SCTP_INP_READ_LOCK(inp); + hold_rlock = 1; + if (cp_len == SCTP_BUF_LEN(m)) { + if ((SCTP_BUF_NEXT(m)== NULL) && + (control->end_added)) { + out_flags |= MSG_EOR; + if ((control->do_not_ref_stcb == 0) && + (control->stcb != NULL) && + ((control->spec_flags & M_NOTIFICATION) == 0)) + control->stcb->asoc.strmin[control->sinfo_stream].delivery_started = 0; + } + if (control->spec_flags & M_NOTIFICATION) { + out_flags |= MSG_NOTIFICATION; + } + /* we ate up the mbuf */ + if (in_flags & MSG_PEEK) { + /* just looking */ + m = SCTP_BUF_NEXT(m); + copied_so_far += cp_len; + } else { + /* dispose of the mbuf */ + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) { + sctp_sblog(&so->so_rcv, + control->do_not_ref_stcb?NULL:stcb, SCTP_LOG_SBFREE, SCTP_BUF_LEN(m)); + } + sctp_sbfree(control, stcb, &so->so_rcv, m); + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) { + sctp_sblog(&so->so_rcv, + control->do_not_ref_stcb?NULL:stcb, SCTP_LOG_SBRESULT, 0); + } + copied_so_far += cp_len; + freed_so_far += (uint32_t)cp_len; + freed_so_far += MSIZE; + atomic_subtract_int(&control->length, (int)cp_len); + control->data = sctp_m_free(m); + m = control->data; + /* been through it all, must hold sb lock ok to null tail */ + if (control->data == NULL) { +#ifdef INVARIANTS +#if defined(__FreeBSD__) && !defined(__Userspace__) + if ((control->end_added == 0) || + (TAILQ_NEXT(control, next) == NULL)) { + /* If the end is not added, OR the + * next is NOT null we MUST have the lock. + */ + if (mtx_owned(&inp->inp_rdata_mtx) == 0) { + panic("Hmm we don't own the lock?"); + } + } +#endif +#endif + control->tail_mbuf = NULL; +#ifdef INVARIANTS + if ((control->end_added) && ((out_flags & MSG_EOR) == 0)) { + panic("end_added, nothing left and no MSG_EOR"); + } +#endif + } + } + } else { + /* Do we need to trim the mbuf? */ + if (control->spec_flags & M_NOTIFICATION) { + out_flags |= MSG_NOTIFICATION; + } + if ((in_flags & MSG_PEEK) == 0) { + SCTP_BUF_RESV_UF(m, cp_len); + SCTP_BUF_LEN(m) -= (int)cp_len; + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) { + sctp_sblog(&so->so_rcv, control->do_not_ref_stcb?NULL:stcb, SCTP_LOG_SBFREE, (int)cp_len); + } + atomic_subtract_int(&so->so_rcv.sb_cc, (int)cp_len); + if ((control->do_not_ref_stcb == 0) && + stcb) { + atomic_subtract_int(&stcb->asoc.sb_cc, (int)cp_len); + } + copied_so_far += cp_len; + freed_so_far += (uint32_t)cp_len; + freed_so_far += MSIZE; + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) { + sctp_sblog(&so->so_rcv, control->do_not_ref_stcb?NULL:stcb, + SCTP_LOG_SBRESULT, 0); + } + atomic_subtract_int(&control->length, (int)cp_len); + } else { + copied_so_far += cp_len; + } + } +#if defined(__APPLE__) && !defined(__Userspace__) +#if defined(APPLE_LEOPARD) + if ((out_flags & MSG_EOR) || (uio->uio_resid == 0)) { +#else + if ((out_flags & MSG_EOR) || (uio_resid(uio) == 0)) { +#endif +#else + if ((out_flags & MSG_EOR) || (uio->uio_resid == 0)) { +#endif + break; + } + if (((stcb) && (in_flags & MSG_PEEK) == 0) && + (control->do_not_ref_stcb == 0) && + (freed_so_far >= rwnd_req)) { + sctp_user_rcvd(stcb, &freed_so_far, hold_rlock, rwnd_req); + } + } /* end while(m) */ + /* + * At this point we have looked at it all and we either have + * a MSG_EOR/or read all the user wants... <OR> + * control->length == 0. + */ + if ((out_flags & MSG_EOR) && ((in_flags & MSG_PEEK) == 0)) { + /* we are done with this control */ + if (control->length == 0) { + if (control->data) { +#ifdef INVARIANTS + panic("control->data not null at read eor?"); +#else + SCTP_PRINTF("Strange, data left in the control buffer .. invariants would panic?\n"); + sctp_m_freem(control->data); + control->data = NULL; +#endif + } + done_with_control: + if (hold_rlock == 0) { + SCTP_INP_READ_LOCK(inp); + hold_rlock = 1; + } + TAILQ_REMOVE(&inp->read_queue, control, next); + /* Add back any hidden data */ + if (control->held_length) { + held_length = 0; + control->held_length = 0; + wakeup_read_socket = 1; + } + if (control->aux_data) { + sctp_m_free (control->aux_data); + control->aux_data = NULL; + } + no_rcv_needed = control->do_not_ref_stcb; + sctp_free_remote_addr(control->whoFrom); + control->data = NULL; +#ifdef INVARIANTS + if (control->on_strm_q) { + panic("About to free ctl:%p so:%p and its in %d", + control, so, control->on_strm_q); + } +#endif + sctp_free_a_readq(stcb, control); + control = NULL; + if ((freed_so_far >= rwnd_req) && + (no_rcv_needed == 0)) + sctp_user_rcvd(stcb, &freed_so_far, hold_rlock, rwnd_req); + + } else { + /* + * The user did not read all of this + * message, turn off the returned MSG_EOR + * since we are leaving more behind on the + * control to read. + */ +#ifdef INVARIANTS + if (control->end_added && + (control->data == NULL) && + (control->tail_mbuf == NULL)) { + panic("Gak, control->length is corrupt?"); + } +#endif + no_rcv_needed = control->do_not_ref_stcb; + out_flags &= ~MSG_EOR; + } + } + if (out_flags & MSG_EOR) { + goto release; + } +#if defined(__APPLE__) && !defined(__Userspace__) +#if defined(APPLE_LEOPARD) + if ((uio->uio_resid == 0) || +#else + if ((uio_resid(uio) == 0) || +#endif +#else + if ((uio->uio_resid == 0) || +#endif + ((in_eeor_mode) && + (copied_so_far >= max(so->so_rcv.sb_lowat, 1)))) { + goto release; + } + /* + * If I hit here the receiver wants more and this message is + * NOT done (pd-api). So two questions. Can we block? if not + * we are done. Did the user NOT set MSG_WAITALL? + */ + if (block_allowed == 0) { + goto release; + } + /* + * We need to wait for more data a few things: + * - We don't release the I/O lock so we don't get someone else + * reading. + * - We must be sure to account for the case where what is added + * is NOT to our control when we wakeup. + */ + + /* Do we need to tell the transport a rwnd update might be + * needed before we go to sleep? + */ + if (((stcb) && (in_flags & MSG_PEEK) == 0) && + ((freed_so_far >= rwnd_req) && + (control->do_not_ref_stcb == 0) && + (no_rcv_needed == 0))) { + sctp_user_rcvd(stcb, &freed_so_far, hold_rlock, rwnd_req); + } + wait_some_more: +#if (defined(__FreeBSD__) || defined(_WIN32)) && !defined(__Userspace__) + if (so->so_rcv.sb_state & SBS_CANTRCVMORE) { + goto release; + } +#else + if (so->so_state & SS_CANTRCVMORE) { + goto release; + } +#endif + + if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) + goto release; + + if (hold_rlock == 1) { + SCTP_INP_READ_UNLOCK(inp); + hold_rlock = 0; + } + if (hold_sblock == 0) { + SOCKBUF_LOCK(&so->so_rcv); + hold_sblock = 1; + } + if ((copied_so_far) && (control->length == 0) && + (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE))) { + goto release; + } +#if defined(__APPLE__) && !defined(__Userspace__) + sbunlock(&so->so_rcv, 1); +#endif + if (SCTP_SBAVAIL(&so->so_rcv) <= control->held_length) { +#if defined(__FreeBSD__) && !defined(__Userspace__) + error = sbwait(so, SO_RCV); +#else + error = sbwait(&so->so_rcv); +#endif + if (error) { +#if defined(__APPLE__) && !defined(__Userspace__) + goto release_unlocked; +#else + goto release; +#endif + } + control->held_length = 0; + } +#if defined(__APPLE__) && !defined(__Userspace__) + error = sblock(&so->so_rcv, SBLOCKWAIT(in_flags)); +#endif + if (hold_sblock) { + SOCKBUF_UNLOCK(&so->so_rcv); + hold_sblock = 0; + } + if (control->length == 0) { + /* still nothing here */ + if (control->end_added == 1) { + /* he aborted, or is done i.e.did a shutdown */ + out_flags |= MSG_EOR; + if (control->pdapi_aborted) { + if ((control->do_not_ref_stcb == 0) && ((control->spec_flags & M_NOTIFICATION) == 0)) + control->stcb->asoc.strmin[control->sinfo_stream].delivery_started = 0; + + out_flags |= MSG_TRUNC; + } else { + if ((control->do_not_ref_stcb == 0) && ((control->spec_flags & M_NOTIFICATION) == 0)) + control->stcb->asoc.strmin[control->sinfo_stream].delivery_started = 0; + } + goto done_with_control; + } + if (SCTP_SBAVAIL(&so->so_rcv) > held_length) { + control->held_length = SCTP_SBAVAIL(&so->so_rcv); + held_length = 0; + } + goto wait_some_more; + } else if (control->data == NULL) { + /* we must re-sync since data + * is probably being added + */ + SCTP_INP_READ_LOCK(inp); + if ((control->length > 0) && (control->data == NULL)) { + /* big trouble.. we have the lock and its corrupt? */ +#ifdef INVARIANTS + panic ("Impossible data==NULL length !=0"); +#endif + out_flags |= MSG_EOR; + out_flags |= MSG_TRUNC; + control->length = 0; + SCTP_INP_READ_UNLOCK(inp); + goto done_with_control; + } + SCTP_INP_READ_UNLOCK(inp); + /* We will fall around to get more data */ + } + goto get_more_data; + } else { + /*- + * Give caller back the mbuf chain, + * store in uio_resid the length + */ + wakeup_read_socket = 0; + if ((control->end_added == 0) || + (TAILQ_NEXT(control, next) == NULL)) { + /* Need to get rlock */ + if (hold_rlock == 0) { + SCTP_INP_READ_LOCK(inp); + hold_rlock = 1; + } + } + if (control->end_added) { + out_flags |= MSG_EOR; + if ((control->do_not_ref_stcb == 0) && + (control->stcb != NULL) && + ((control->spec_flags & M_NOTIFICATION) == 0)) + control->stcb->asoc.strmin[control->sinfo_stream].delivery_started = 0; + } + if (control->spec_flags & M_NOTIFICATION) { + out_flags |= MSG_NOTIFICATION; + } +#if defined(__APPLE__) && !defined(__Userspace__) +#if defined(APPLE_LEOPARD) + uio->uio_resid = control->length; +#else + uio_setresid(uio, control->length); +#endif +#else + uio->uio_resid = control->length; +#endif + *mp = control->data; + m = control->data; + while (m) { + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) { + sctp_sblog(&so->so_rcv, + control->do_not_ref_stcb?NULL:stcb, SCTP_LOG_SBFREE, SCTP_BUF_LEN(m)); + } + sctp_sbfree(control, stcb, &so->so_rcv, m); + freed_so_far += (uint32_t)SCTP_BUF_LEN(m); + freed_so_far += MSIZE; + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) { + sctp_sblog(&so->so_rcv, + control->do_not_ref_stcb?NULL:stcb, SCTP_LOG_SBRESULT, 0); + } + m = SCTP_BUF_NEXT(m); + } + control->data = control->tail_mbuf = NULL; + control->length = 0; + if (out_flags & MSG_EOR) { + /* Done with this control */ + goto done_with_control; + } + } + release: + if (hold_rlock == 1) { + SCTP_INP_READ_UNLOCK(inp); + hold_rlock = 0; + } +#if defined(__Userspace__) + if (hold_sblock == 0) { + SOCKBUF_LOCK(&so->so_rcv); + hold_sblock = 1; + } +#else + if (hold_sblock == 1) { + SOCKBUF_UNLOCK(&so->so_rcv); + hold_sblock = 0; + } +#endif +#if defined(__APPLE__) && !defined(__Userspace__) + sbunlock(&so->so_rcv, 1); +#endif + +#if defined(__FreeBSD__) && !defined(__Userspace__) + SOCK_IO_RECV_UNLOCK(so); + sockbuf_lock = 0; +#endif + + release_unlocked: + if (hold_sblock) { + SOCKBUF_UNLOCK(&so->so_rcv); + hold_sblock = 0; + } + if ((stcb) && (in_flags & MSG_PEEK) == 0) { + if ((freed_so_far >= rwnd_req) && + (control && (control->do_not_ref_stcb == 0)) && + (no_rcv_needed == 0)) + sctp_user_rcvd(stcb, &freed_so_far, hold_rlock, rwnd_req); + } + out: + if (msg_flags) { + *msg_flags = out_flags; + } + if (((out_flags & MSG_EOR) == 0) && + ((in_flags & MSG_PEEK) == 0) && + (sinfo) && + (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXT_RCVINFO) || + sctp_is_feature_on(inp, SCTP_PCB_FLAGS_RECVNXTINFO))) { + struct sctp_extrcvinfo *s_extra; + s_extra = (struct sctp_extrcvinfo *)sinfo; + s_extra->serinfo_next_flags = SCTP_NO_NEXT_MSG; + } + if (hold_rlock == 1) { + SCTP_INP_READ_UNLOCK(inp); + } + if (hold_sblock) { + SOCKBUF_UNLOCK(&so->so_rcv); + } +#if defined(__FreeBSD__) && !defined(__Userspace__) + if (sockbuf_lock) { + SOCK_IO_RECV_UNLOCK(so); + } +#endif + + if (freecnt_applied) { + /* + * The lock on the socket buffer protects us so the free + * code will stop. But since we used the socketbuf lock and + * the sender uses the tcb_lock to increment, we need to use + * the atomic add to the refcnt. + */ + if (stcb == NULL) { +#ifdef INVARIANTS + panic("stcb for refcnt has gone NULL?"); + goto stage_left; +#else + goto stage_left; +#endif + } + /* Save the value back for next time */ + stcb->freed_by_sorcv_sincelast = freed_so_far; + atomic_subtract_int(&stcb->asoc.refcnt, 1); + } + if (SCTP_BASE_SYSCTL(sctp_logging_level) &SCTP_RECV_RWND_LOGGING_ENABLE) { + if (stcb) { + sctp_misc_ints(SCTP_SORECV_DONE, + freed_so_far, +#if defined(__APPLE__) && !defined(__Userspace__) +#if defined(APPLE_LEOPARD) + ((uio) ? (slen - uio->uio_resid) : slen), +#else + ((uio) ? (slen - uio_resid(uio)) : slen), +#endif +#else + (uint32_t)((uio) ? (slen - uio->uio_resid) : slen), +#endif + stcb->asoc.my_rwnd, + SCTP_SBAVAIL(&so->so_rcv)); + } else { + sctp_misc_ints(SCTP_SORECV_DONE, + freed_so_far, +#if defined(__APPLE__) && !defined(__Userspace__) +#if defined(APPLE_LEOPARD) + ((uio) ? (slen - uio->uio_resid) : slen), +#else + ((uio) ? (slen - uio_resid(uio)) : slen), +#endif +#else + (uint32_t)((uio) ? (slen - uio->uio_resid) : slen), +#endif + 0, + SCTP_SBAVAIL(&so->so_rcv)); + } + } + stage_left: + if (wakeup_read_socket) { + sctp_sorwakeup(inp, so); + } + return (error); +} + +#ifdef SCTP_MBUF_LOGGING +struct mbuf * +sctp_m_free(struct mbuf *m) +{ + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { + sctp_log_mb(m, SCTP_MBUF_IFREE); + } + return (m_free(m)); +} + +void +sctp_m_freem(struct mbuf *mb) +{ + while (mb != NULL) + mb = sctp_m_free(mb); +} + +#endif + +int +sctp_dynamic_set_primary(struct sockaddr *sa, uint32_t vrf_id) +{ + /* Given a local address. For all associations + * that holds the address, request a peer-set-primary. + */ + struct sctp_ifa *ifa; + struct sctp_laddr *wi; + + ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED); + if (ifa == NULL) { + SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTPUTIL, EADDRNOTAVAIL); + return (EADDRNOTAVAIL); + } + /* Now that we have the ifa we must awaken the + * iterator with this message. + */ + wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); + if (wi == NULL) { + SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTPUTIL, ENOMEM); + return (ENOMEM); + } + /* Now incr the count and int wi structure */ + SCTP_INCR_LADDR_COUNT(); + memset(wi, 0, sizeof(*wi)); + (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); + wi->ifa = ifa; + wi->action = SCTP_SET_PRIM_ADDR; + atomic_add_int(&ifa->refcount, 1); + + /* Now add it to the work queue */ + SCTP_WQ_ADDR_LOCK(); + /* + * Should this really be a tailq? As it is we will process the + * newest first :-0 + */ + LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); + sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, + (struct sctp_inpcb *)NULL, + (struct sctp_tcb *)NULL, + (struct sctp_nets *)NULL); + SCTP_WQ_ADDR_UNLOCK(); + return (0); +} + +#if defined(__Userspace__) +/* no sctp_soreceive for __Userspace__ now */ +#endif +#if !defined(__Userspace__) +int +sctp_soreceive( struct socket *so, + struct sockaddr **psa, + struct uio *uio, + struct mbuf **mp0, + struct mbuf **controlp, + int *flagsp) +{ + int error, fromlen; + uint8_t sockbuf[256]; + struct sockaddr *from; + struct sctp_extrcvinfo sinfo; + int filling_sinfo = 1; + int flags; + struct sctp_inpcb *inp; + + inp = (struct sctp_inpcb *)so->so_pcb; + /* pickup the assoc we are reading from */ + if (inp == NULL) { + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL); + return (EINVAL); + } + if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_RECVDATAIOEVNT) && + sctp_is_feature_off(inp, SCTP_PCB_FLAGS_RECVRCVINFO) && + sctp_is_feature_off(inp, SCTP_PCB_FLAGS_RECVNXTINFO)) || + (controlp == NULL)) { + /* user does not want the sndrcv ctl */ + filling_sinfo = 0; + } + if (psa) { + from = (struct sockaddr *)sockbuf; + fromlen = sizeof(sockbuf); +#ifdef HAVE_SA_LEN + from->sa_len = 0; +#endif + } else { + from = NULL; + fromlen = 0; + } + +#if defined(__APPLE__) && !defined(__Userspace__) + SCTP_SOCKET_LOCK(so, 1); +#endif + if (filling_sinfo) { + memset(&sinfo, 0, sizeof(struct sctp_extrcvinfo)); + } + if (flagsp != NULL) { + flags = *flagsp; + } else { + flags = 0; + } + error = sctp_sorecvmsg(so, uio, mp0, from, fromlen, &flags, + (struct sctp_sndrcvinfo *)&sinfo, filling_sinfo); + if (flagsp != NULL) { + *flagsp = flags; + } + if (controlp != NULL) { + /* copy back the sinfo in a CMSG format */ + if (filling_sinfo && ((flags & MSG_NOTIFICATION) == 0)) { + *controlp = sctp_build_ctl_nchunk(inp, + (struct sctp_sndrcvinfo *)&sinfo); + } else { + *controlp = NULL; + } + } + if (psa) { + /* copy back the address info */ +#ifdef HAVE_SA_LEN + if (from && from->sa_len) { +#else + if (from) { +#endif +#if (defined(__FreeBSD__) || defined(_WIN32)) && !defined(__Userspace__) + *psa = sodupsockaddr(from, M_NOWAIT); +#else + *psa = dup_sockaddr(from, mp0 == 0); +#endif + } else { + *psa = NULL; + } + } +#if defined(__APPLE__) && !defined(__Userspace__) + SCTP_SOCKET_UNLOCK(so, 1); +#endif + return (error); +} + +#if defined(_WIN32) && !defined(__Userspace__) +/* + * General routine to allocate a hash table with control of memory flags. + * is in 7.0 and beyond for sure :-) + */ +void * +sctp_hashinit_flags(int elements, struct malloc_type *type, + u_long *hashmask, int flags) +{ + long hashsize; + LIST_HEAD(generic, generic) *hashtbl; + int i; + + + if (elements <= 0) { +#ifdef INVARIANTS + panic("hashinit: bad elements"); +#else + SCTP_PRINTF("hashinit: bad elements?"); + elements = 1; +#endif + } + for (hashsize = 1; hashsize <= elements; hashsize <<= 1) + continue; + hashsize >>= 1; + if (flags & HASH_WAITOK) + hashtbl = malloc((u_long)hashsize * sizeof(*hashtbl), type, M_WAITOK); + else if (flags & HASH_NOWAIT) + hashtbl = malloc((u_long)hashsize * sizeof(*hashtbl), type, M_NOWAIT); + else { +#ifdef INVARIANTS + panic("flag incorrect in hashinit_flags"); +#else + return (NULL); +#endif + } + + /* no memory? */ + if (hashtbl == NULL) + return (NULL); + + for (i = 0; i < hashsize; i++) + LIST_INIT(&hashtbl[i]); + *hashmask = hashsize - 1; + return (hashtbl); +} +#endif +#else /* __Userspace__ ifdef above sctp_soreceive */ +/* + * __Userspace__ Defining sctp_hashinit_flags() and sctp_hashdestroy() for userland. + * NOTE: We don't want multiple definitions here. So sctp_hashinit_flags() above for + *__FreeBSD__ must be excluded. + * + */ + +void * +sctp_hashinit_flags(int elements, struct malloc_type *type, + u_long *hashmask, int flags) +{ + long hashsize; + LIST_HEAD(generic, generic) *hashtbl; + int i; + + if (elements <= 0) { + SCTP_PRINTF("hashinit: bad elements?"); +#ifdef INVARIANTS + return (NULL); +#else + elements = 1; +#endif + } + for (hashsize = 1; hashsize <= elements; hashsize <<= 1) + continue; + hashsize >>= 1; + /*cannot use MALLOC here because it has to be declared or defined + using MALLOC_DECLARE or MALLOC_DEFINE first. */ + if (flags & HASH_WAITOK) + hashtbl = malloc((u_long)hashsize * sizeof(*hashtbl)); + else if (flags & HASH_NOWAIT) + hashtbl = malloc((u_long)hashsize * sizeof(*hashtbl)); + else { +#ifdef INVARIANTS + SCTP_PRINTF("flag incorrect in hashinit_flags.\n"); +#endif + return (NULL); + } + + /* no memory? */ + if (hashtbl == NULL) + return (NULL); + + for (i = 0; i < hashsize; i++) + LIST_INIT(&hashtbl[i]); + *hashmask = hashsize - 1; + return (hashtbl); +} + +void +sctp_hashdestroy(void *vhashtbl, struct malloc_type *type, u_long hashmask) +{ + LIST_HEAD(generic, generic) *hashtbl, *hp; + + hashtbl = vhashtbl; + for (hp = hashtbl; hp <= &hashtbl[hashmask]; hp++) + if (!LIST_EMPTY(hp)) { + SCTP_PRINTF("hashdestroy: hash not empty.\n"); + return; + } + FREE(hashtbl, type); +} + +void +sctp_hashfreedestroy(void *vhashtbl, struct malloc_type *type, u_long hashmask) +{ + LIST_HEAD(generic, generic) *hashtbl/*, *hp*/; + /* + LIST_ENTRY(type) *start, *temp; + */ + hashtbl = vhashtbl; + /* Apparently temp is not dynamically allocated, so attempts to + free it results in error. + for (hp = hashtbl; hp <= &hashtbl[hashmask]; hp++) + if (!LIST_EMPTY(hp)) { + start = LIST_FIRST(hp); + while (start != NULL) { + temp = start; + start = start->le_next; + SCTP_PRINTF("%s: %p \n", __func__, (void *)temp); + FREE(temp, type); + } + } + */ + FREE(hashtbl, type); +} + +#endif +int +sctp_connectx_helper_add(struct sctp_tcb *stcb, struct sockaddr *addr, + int totaddr, int *error) +{ + int added = 0; + int i; + struct sctp_inpcb *inp; + struct sockaddr *sa; + size_t incr = 0; +#ifdef INET + struct sockaddr_in *sin; +#endif +#ifdef INET6 + struct sockaddr_in6 *sin6; +#endif + + sa = addr; + inp = stcb->sctp_ep; + *error = 0; + for (i = 0; i < totaddr; i++) { + switch (sa->sa_family) { +#ifdef INET + case AF_INET: + incr = sizeof(struct sockaddr_in); + sin = (struct sockaddr_in *)sa; + if ((sin->sin_addr.s_addr == INADDR_ANY) || + (sin->sin_addr.s_addr == INADDR_BROADCAST) || + IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { + SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, EINVAL); + (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, + SCTP_FROM_SCTPUTIL + SCTP_LOC_7); + *error = EINVAL; + goto out_now; + } + if (sctp_add_remote_addr(stcb, sa, NULL, stcb->asoc.port, + SCTP_DONOT_SETSCOPE, + SCTP_ADDR_IS_CONFIRMED)) { + /* assoc gone no un-lock */ + SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, ENOBUFS); + (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, + SCTP_FROM_SCTPUTIL + SCTP_LOC_8); + *error = ENOBUFS; + goto out_now; + } + added++; + break; +#endif +#ifdef INET6 + case AF_INET6: + incr = sizeof(struct sockaddr_in6); + sin6 = (struct sockaddr_in6 *)sa; + if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || + IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { + SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, EINVAL); + (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, + SCTP_FROM_SCTPUTIL + SCTP_LOC_9); + *error = EINVAL; + goto out_now; + } + if (sctp_add_remote_addr(stcb, sa, NULL, stcb->asoc.port, + SCTP_DONOT_SETSCOPE, + SCTP_ADDR_IS_CONFIRMED)) { + /* assoc gone no un-lock */ + SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, ENOBUFS); + (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, + SCTP_FROM_SCTPUTIL + SCTP_LOC_10); + *error = ENOBUFS; + goto out_now; + } + added++; + break; +#endif +#if defined(__Userspace__) + case AF_CONN: + incr = sizeof(struct sockaddr_conn); + if (sctp_add_remote_addr(stcb, sa, NULL, stcb->asoc.port, + SCTP_DONOT_SETSCOPE, + SCTP_ADDR_IS_CONFIRMED)) { + /* assoc gone no un-lock */ + SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, ENOBUFS); + (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, + SCTP_FROM_SCTPUTIL + SCTP_LOC_11); + *error = ENOBUFS; + goto out_now; + } + added++; + break; +#endif + default: + break; + } + sa = (struct sockaddr *)((caddr_t)sa + incr); + } + out_now: + return (added); +} + +int +sctp_connectx_helper_find(struct sctp_inpcb *inp, struct sockaddr *addr, + unsigned int totaddr, + unsigned int *num_v4, unsigned int *num_v6, + unsigned int limit) +{ + struct sockaddr *sa; + struct sctp_tcb *stcb; + unsigned int incr, at, i; + + at = 0; + sa = addr; + *num_v6 = *num_v4 = 0; + /* account and validate addresses */ + if (totaddr == 0) { + return (EINVAL); + } + for (i = 0; i < totaddr; i++) { + if (at + sizeof(struct sockaddr) > limit) { + return (EINVAL); + } + switch (sa->sa_family) { +#ifdef INET + case AF_INET: + incr = (unsigned int)sizeof(struct sockaddr_in); +#ifdef HAVE_SA_LEN + if (sa->sa_len != incr) { + return (EINVAL); + } +#endif + (*num_v4) += 1; + break; +#endif +#ifdef INET6 + case AF_INET6: + { + struct sockaddr_in6 *sin6; + + incr = (unsigned int)sizeof(struct sockaddr_in6); +#ifdef HAVE_SA_LEN + if (sa->sa_len != incr) { + return (EINVAL); + } +#endif + sin6 = (struct sockaddr_in6 *)sa; + if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { + /* Must be non-mapped for connectx */ + return (EINVAL); + } + (*num_v6) += 1; + break; + } +#endif + default: + return (EINVAL); + } + if ((at + incr) > limit) { + return (EINVAL); + } + SCTP_INP_INCR_REF(inp); + stcb = sctp_findassociation_ep_addr(&inp, sa, NULL, NULL, NULL); + if (stcb != NULL) { + SCTP_TCB_UNLOCK(stcb); + return (EALREADY); + } else { + SCTP_INP_DECR_REF(inp); + } + at += incr; + sa = (struct sockaddr *)((caddr_t)sa + incr); + } + return (0); +} + +/* + * sctp_bindx(ADD) for one address. + * assumes all arguments are valid/checked by caller. + */ +void +sctp_bindx_add_address(struct socket *so, struct sctp_inpcb *inp, + struct sockaddr *sa, uint32_t vrf_id, int *error, + void *p) +{ +#if defined(INET) && defined(INET6) + struct sockaddr_in sin; +#endif +#ifdef INET6 + struct sockaddr_in6 *sin6; +#endif +#ifdef INET + struct sockaddr_in *sinp; +#endif + struct sockaddr *addr_to_use; + struct sctp_inpcb *lep; +#ifdef SCTP_MVRF + int i; +#endif + uint16_t port; + + /* see if we're bound all already! */ + if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL); + *error = EINVAL; + return; + } +#ifdef SCTP_MVRF + /* Is the VRF one we have */ + for (i = 0; i < inp->num_vrfs; i++) { + if (vrf_id == inp->m_vrf_ids[i]) { + break; + } + } + if (i == inp->num_vrfs) { + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL); + *error = EINVAL; + return; + } +#endif + switch (sa->sa_family) { +#ifdef INET6 + case AF_INET6: +#ifdef HAVE_SA_LEN + if (sa->sa_len != sizeof(struct sockaddr_in6)) { + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL); + *error = EINVAL; + return; + } +#endif + if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { + /* can only bind v6 on PF_INET6 sockets */ + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL); + *error = EINVAL; + return; + } + sin6 = (struct sockaddr_in6 *)sa; + port = sin6->sin6_port; +#ifdef INET + if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { + if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && + SCTP_IPV6_V6ONLY(inp)) { + /* can't bind v4-mapped on PF_INET sockets */ + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL); + *error = EINVAL; + return; + } + in6_sin6_2_sin(&sin, sin6); + addr_to_use = (struct sockaddr *)&sin; + } else { + addr_to_use = sa; + } +#else + addr_to_use = sa; +#endif + break; +#endif +#ifdef INET + case AF_INET: +#ifdef HAVE_SA_LEN + if (sa->sa_len != sizeof(struct sockaddr_in)) { + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL); + *error = EINVAL; + return; + } +#endif + if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && + SCTP_IPV6_V6ONLY(inp)) { + /* can't bind v4 on PF_INET sockets */ + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL); + *error = EINVAL; + return; + } + sinp = (struct sockaddr_in *)sa; + port = sinp->sin_port; + addr_to_use = sa; + break; +#endif + default: + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL); + *error = EINVAL; + return; + } + if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { +#if !(defined(_WIN32) || defined(__Userspace__)) + if (p == NULL) { + /* Can't get proc for Net/Open BSD */ + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL); + *error = EINVAL; + return; + } +#endif + *error = sctp_inpcb_bind(so, addr_to_use, NULL, p); + return; + } + /* Validate the incoming port. */ + if ((port != 0) && (port != inp->sctp_lport)) { + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL); + *error = EINVAL; + return; + } + lep = sctp_pcb_findep(addr_to_use, 1, 0, vrf_id); + if (lep == NULL) { + /* add the address */ + *error = sctp_addr_mgmt_ep_sa(inp, addr_to_use, + SCTP_ADD_IP_ADDRESS, vrf_id); + } else { + if (lep != inp) { + *error = EADDRINUSE; + } + SCTP_INP_DECR_REF(lep); + } +} + +/* + * sctp_bindx(DELETE) for one address. + * assumes all arguments are valid/checked by caller. + */ +void +sctp_bindx_delete_address(struct sctp_inpcb *inp, + struct sockaddr *sa, uint32_t vrf_id, int *error) +{ + struct sockaddr *addr_to_use; +#if defined(INET) && defined(INET6) + struct sockaddr_in6 *sin6; + struct sockaddr_in sin; +#endif +#ifdef SCTP_MVRF + int i; +#endif + + /* see if we're bound all already! */ + if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL); + *error = EINVAL; + return; + } +#ifdef SCTP_MVRF + /* Is the VRF one we have */ + for (i = 0; i < inp->num_vrfs; i++) { + if (vrf_id == inp->m_vrf_ids[i]) { + break; + } + } + if (i == inp->num_vrfs) { + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL); + *error = EINVAL; + return; + } +#endif + switch (sa->sa_family) { +#ifdef INET6 + case AF_INET6: +#ifdef HAVE_SA_LEN + if (sa->sa_len != sizeof(struct sockaddr_in6)) { + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL); + *error = EINVAL; + return; + } +#endif + if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { + /* can only bind v6 on PF_INET6 sockets */ + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL); + *error = EINVAL; + return; + } +#ifdef INET + sin6 = (struct sockaddr_in6 *)sa; + if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { + if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && + SCTP_IPV6_V6ONLY(inp)) { + /* can't bind mapped-v4 on PF_INET sockets */ + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL); + *error = EINVAL; + return; + } + in6_sin6_2_sin(&sin, sin6); + addr_to_use = (struct sockaddr *)&sin; + } else { + addr_to_use = sa; + } +#else + addr_to_use = sa; +#endif + break; +#endif +#ifdef INET + case AF_INET: +#ifdef HAVE_SA_LEN + if (sa->sa_len != sizeof(struct sockaddr_in)) { + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL); + *error = EINVAL; + return; + } +#endif + if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && + SCTP_IPV6_V6ONLY(inp)) { + /* can't bind v4 on PF_INET sockets */ + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL); + *error = EINVAL; + return; + } + addr_to_use = sa; + break; +#endif + default: + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL); + *error = EINVAL; + return; + } + /* No lock required mgmt_ep_sa does its own locking. */ + *error = sctp_addr_mgmt_ep_sa(inp, addr_to_use, SCTP_DEL_IP_ADDRESS, + vrf_id); +} + +/* + * returns the valid local address count for an assoc, taking into account + * all scoping rules + */ +int +sctp_local_addr_count(struct sctp_tcb *stcb) +{ + int loopback_scope; +#if defined(INET) + int ipv4_local_scope, ipv4_addr_legal; +#endif +#if defined(INET6) + int local_scope, site_scope, ipv6_addr_legal; +#endif +#if defined(__Userspace__) + int conn_addr_legal; +#endif + struct sctp_vrf *vrf; + struct sctp_ifn *sctp_ifn; + struct sctp_ifa *sctp_ifa; + int count = 0; + + /* Turn on all the appropriate scopes */ + loopback_scope = stcb->asoc.scope.loopback_scope; +#if defined(INET) + ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope; + ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal; +#endif +#if defined(INET6) + local_scope = stcb->asoc.scope.local_scope; + site_scope = stcb->asoc.scope.site_scope; + ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal; +#endif +#if defined(__Userspace__) + conn_addr_legal = stcb->asoc.scope.conn_addr_legal; +#endif + SCTP_IPI_ADDR_RLOCK(); + vrf = sctp_find_vrf(stcb->asoc.vrf_id); + if (vrf == NULL) { + /* no vrf, no addresses */ + SCTP_IPI_ADDR_RUNLOCK(); + return (0); + } + + if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { + /* + * bound all case: go through all ifns on the vrf + */ + LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { + if ((loopback_scope == 0) && + SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { + continue; + } + LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { + if (sctp_is_addr_restricted(stcb, sctp_ifa)) + continue; + switch (sctp_ifa->address.sa.sa_family) { +#ifdef INET + case AF_INET: + if (ipv4_addr_legal) { + struct sockaddr_in *sin; + + sin = &sctp_ifa->address.sin; + if (sin->sin_addr.s_addr == 0) { + /* skip unspecified addrs */ + continue; + } +#if defined(__FreeBSD__) && !defined(__Userspace__) + if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, + &sin->sin_addr) != 0) { + continue; + } +#endif + if ((ipv4_local_scope == 0) && + (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { + continue; + } + /* count this one */ + count++; + } else { + continue; + } + break; +#endif +#ifdef INET6 + case AF_INET6: + if (ipv6_addr_legal) { + struct sockaddr_in6 *sin6; + +#if defined(SCTP_EMBEDDED_V6_SCOPE) && !defined(SCTP_KAME) + struct sockaddr_in6 lsa6; +#endif + sin6 = &sctp_ifa->address.sin6; + if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { + continue; + } +#if defined(__FreeBSD__) && !defined(__Userspace__) + if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, + &sin6->sin6_addr) != 0) { + continue; + } +#endif + if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { + if (local_scope == 0) + continue; +#if defined(SCTP_EMBEDDED_V6_SCOPE) + if (sin6->sin6_scope_id == 0) { +#ifdef SCTP_KAME + if (sa6_recoverscope(sin6) != 0) + /* + * bad link + * local + * address + */ + continue; +#else + lsa6 = *sin6; + if (in6_recoverscope(&lsa6, + &lsa6.sin6_addr, + NULL)) + /* + * bad link + * local + * address + */ + continue; + sin6 = &lsa6; +#endif /* SCTP_KAME */ + } +#endif /* SCTP_EMBEDDED_V6_SCOPE */ + } + if ((site_scope == 0) && + (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { + continue; + } + /* count this one */ + count++; + } + break; +#endif +#if defined(__Userspace__) + case AF_CONN: + if (conn_addr_legal) { + count++; + } + break; +#endif + default: + /* TSNH */ + break; + } + } + } + } else { + /* + * subset bound case + */ + struct sctp_laddr *laddr; + LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, + sctp_nxt_addr) { + if (sctp_is_addr_restricted(stcb, laddr->ifa)) { + continue; + } + /* count this one */ + count++; + } + } + SCTP_IPI_ADDR_RUNLOCK(); + return (count); +} + +#if defined(SCTP_LOCAL_TRACE_BUF) + +void +sctp_log_trace(uint32_t subsys, const char *str SCTP_UNUSED, uint32_t a, uint32_t b, uint32_t c, uint32_t d, uint32_t e, uint32_t f) +{ + uint32_t saveindex, newindex; + +#if defined(_WIN32) && !defined(__Userspace__) + if (SCTP_BASE_SYSCTL(sctp_log) == NULL) { + return; + } + do { + saveindex = SCTP_BASE_SYSCTL(sctp_log)->index; + if (saveindex >= SCTP_MAX_LOGGING_SIZE) { + newindex = 1; + } else { + newindex = saveindex + 1; + } + } while (atomic_cmpset_int(&SCTP_BASE_SYSCTL(sctp_log)->index, saveindex, newindex) == 0); + if (saveindex >= SCTP_MAX_LOGGING_SIZE) { + saveindex = 0; + } + SCTP_BASE_SYSCTL(sctp_log)->entry[saveindex].timestamp = SCTP_GET_CYCLECOUNT; + SCTP_BASE_SYSCTL(sctp_log)->entry[saveindex].subsys = subsys; + SCTP_BASE_SYSCTL(sctp_log)->entry[saveindex].params[0] = a; + SCTP_BASE_SYSCTL(sctp_log)->entry[saveindex].params[1] = b; + SCTP_BASE_SYSCTL(sctp_log)->entry[saveindex].params[2] = c; + SCTP_BASE_SYSCTL(sctp_log)->entry[saveindex].params[3] = d; + SCTP_BASE_SYSCTL(sctp_log)->entry[saveindex].params[4] = e; + SCTP_BASE_SYSCTL(sctp_log)->entry[saveindex].params[5] = f; +#else + do { + saveindex = SCTP_BASE_SYSCTL(sctp_log).index; + if (saveindex >= SCTP_MAX_LOGGING_SIZE) { + newindex = 1; + } else { + newindex = saveindex + 1; + } + } while (atomic_cmpset_int(&SCTP_BASE_SYSCTL(sctp_log).index, saveindex, newindex) == 0); + if (saveindex >= SCTP_MAX_LOGGING_SIZE) { + saveindex = 0; + } + SCTP_BASE_SYSCTL(sctp_log).entry[saveindex].timestamp = SCTP_GET_CYCLECOUNT; + SCTP_BASE_SYSCTL(sctp_log).entry[saveindex].subsys = subsys; + SCTP_BASE_SYSCTL(sctp_log).entry[saveindex].params[0] = a; + SCTP_BASE_SYSCTL(sctp_log).entry[saveindex].params[1] = b; + SCTP_BASE_SYSCTL(sctp_log).entry[saveindex].params[2] = c; + SCTP_BASE_SYSCTL(sctp_log).entry[saveindex].params[3] = d; + SCTP_BASE_SYSCTL(sctp_log).entry[saveindex].params[4] = e; + SCTP_BASE_SYSCTL(sctp_log).entry[saveindex].params[5] = f; +#endif +} + +#endif +#if defined(__FreeBSD__) && !defined(__Userspace__) +static bool +sctp_recv_udp_tunneled_packet(struct mbuf *m, int off, struct inpcb *inp, + const struct sockaddr *sa SCTP_UNUSED, void *ctx SCTP_UNUSED) +{ + struct ip *iph; +#ifdef INET6 + struct ip6_hdr *ip6; +#endif + struct mbuf *sp, *last; + struct udphdr *uhdr; + uint16_t port; + + if ((m->m_flags & M_PKTHDR) == 0) { + /* Can't handle one that is not a pkt hdr */ + goto out; + } + /* Pull the src port */ + iph = mtod(m, struct ip *); + uhdr = (struct udphdr *)((caddr_t)iph + off); + port = uhdr->uh_sport; + /* Split out the mbuf chain. Leave the + * IP header in m, place the + * rest in the sp. + */ + sp = m_split(m, off, M_NOWAIT); + if (sp == NULL) { + /* Gak, drop packet, we can't do a split */ + goto out; + } + if (sp->m_pkthdr.len < sizeof(struct udphdr) + sizeof(struct sctphdr)) { + /* Gak, packet can't have an SCTP header in it - too small */ + m_freem(sp); + goto out; + } + /* Now pull up the UDP header and SCTP header together */ + sp = m_pullup(sp, sizeof(struct udphdr) + sizeof(struct sctphdr)); + if (sp == NULL) { + /* Gak pullup failed */ + goto out; + } + /* Trim out the UDP header */ + m_adj(sp, sizeof(struct udphdr)); + + /* Now reconstruct the mbuf chain */ + for (last = m; last->m_next; last = last->m_next); + last->m_next = sp; + m->m_pkthdr.len += sp->m_pkthdr.len; + /* + * The CSUM_DATA_VALID flags indicates that the HW checked the + * UDP checksum and it was valid. + * Since CSUM_DATA_VALID == CSUM_SCTP_VALID this would imply that + * the HW also verified the SCTP checksum. Therefore, clear the bit. + */ + SCTPDBG(SCTP_DEBUG_CRCOFFLOAD, + "sctp_recv_udp_tunneled_packet(): Packet of length %d received on %s with csum_flags 0x%b.\n", + m->m_pkthdr.len, + if_name(m->m_pkthdr.rcvif), + (int)m->m_pkthdr.csum_flags, CSUM_BITS); + m->m_pkthdr.csum_flags &= ~CSUM_DATA_VALID; + iph = mtod(m, struct ip *); + switch (iph->ip_v) { +#ifdef INET + case IPVERSION: + iph->ip_len = htons(ntohs(iph->ip_len) - sizeof(struct udphdr)); + sctp_input_with_port(m, off, port); + break; +#endif +#ifdef INET6 + case IPV6_VERSION >> 4: + ip6 = mtod(m, struct ip6_hdr *); + ip6->ip6_plen = htons(ntohs(ip6->ip6_plen) - sizeof(struct udphdr)); + sctp6_input_with_port(&m, &off, port); + break; +#endif + default: + goto out; + break; + } + return (true); + out: + m_freem(m); + + return (true); +} + +#ifdef INET +static void +sctp_recv_icmp_tunneled_packet(udp_tun_icmp_param_t param) +{ + struct icmp *icmp = param.icmp; + struct ip *outer_ip, *inner_ip; + struct sctphdr *sh; + struct udphdr *udp; + struct sctp_inpcb *inp; + struct sctp_tcb *stcb; + struct sctp_nets *net; + struct sctp_init_chunk *ch; + struct sockaddr_in src, dst; + uint8_t type, code; + + inner_ip = &icmp->icmp_ip; + outer_ip = (struct ip *)((caddr_t)icmp - sizeof(struct ip)); + if (ntohs(outer_ip->ip_len) < + sizeof(struct ip) + 8 + (inner_ip->ip_hl << 2) + sizeof(struct udphdr) + 8) { + return; + } + udp = (struct udphdr *)((caddr_t)inner_ip + (inner_ip->ip_hl << 2)); + sh = (struct sctphdr *)(udp + 1); + memset(&src, 0, sizeof(struct sockaddr_in)); + src.sin_family = AF_INET; +#ifdef HAVE_SIN_LEN + src.sin_len = sizeof(struct sockaddr_in); +#endif + src.sin_port = sh->src_port; + src.sin_addr = inner_ip->ip_src; + memset(&dst, 0, sizeof(struct sockaddr_in)); + dst.sin_family = AF_INET; +#ifdef HAVE_SIN_LEN + dst.sin_len = sizeof(struct sockaddr_in); +#endif + dst.sin_port = sh->dest_port; + dst.sin_addr = inner_ip->ip_dst; + /* + * 'dst' holds the dest of the packet that failed to be sent. + * 'src' holds our local endpoint address. Thus we reverse + * the dst and the src in the lookup. + */ + inp = NULL; + net = NULL; + stcb = sctp_findassociation_addr_sa((struct sockaddr *)&dst, + (struct sockaddr *)&src, + &inp, &net, 1, + SCTP_DEFAULT_VRFID); + if ((stcb != NULL) && + (net != NULL) && + (inp != NULL)) { + /* Check the UDP port numbers */ + if ((udp->uh_dport != net->port) || + (udp->uh_sport != htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)))) { + SCTP_TCB_UNLOCK(stcb); + return; + } + /* Check the verification tag */ + if (ntohl(sh->v_tag) != 0) { + /* + * This must be the verification tag used + * for sending out packets. We don't + * consider packets reflecting the + * verification tag. + */ + if (ntohl(sh->v_tag) != stcb->asoc.peer_vtag) { + SCTP_TCB_UNLOCK(stcb); + return; + } + } else { + if (ntohs(outer_ip->ip_len) >= + sizeof(struct ip) + + 8 + (inner_ip->ip_hl << 2) + 8 + 20) { + /* + * In this case we can check if we + * got an INIT chunk and if the + * initiate tag matches. + */ + ch = (struct sctp_init_chunk *)(sh + 1); + if ((ch->ch.chunk_type != SCTP_INITIATION) || + (ntohl(ch->init.initiate_tag) != stcb->asoc.my_vtag)) { + SCTP_TCB_UNLOCK(stcb); + return; + } + } else { + SCTP_TCB_UNLOCK(stcb); + return; + } + } + type = icmp->icmp_type; + code = icmp->icmp_code; + if ((type == ICMP_UNREACH) && + (code == ICMP_UNREACH_PORT)) { + code = ICMP_UNREACH_PROTOCOL; + } + sctp_notify(inp, stcb, net, type, code, + ntohs(inner_ip->ip_len), + (uint32_t)ntohs(icmp->icmp_nextmtu)); +#if defined(__Userspace__) + if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) && + (stcb->sctp_socket != NULL)) { + struct socket *upcall_socket; + + upcall_socket = stcb->sctp_socket; + SOCK_LOCK(upcall_socket); + soref(upcall_socket); + SOCK_UNLOCK(upcall_socket); + if ((upcall_socket->so_upcall != NULL) && + (upcall_socket->so_error != 0)) { + (*upcall_socket->so_upcall)(upcall_socket, upcall_socket->so_upcallarg, M_NOWAIT); + } + ACCEPT_LOCK(); + SOCK_LOCK(upcall_socket); + sorele(upcall_socket); + } +#endif + } else { + if ((stcb == NULL) && (inp != NULL)) { + /* reduce ref-count */ + SCTP_INP_WLOCK(inp); + SCTP_INP_DECR_REF(inp); + SCTP_INP_WUNLOCK(inp); + } + if (stcb) { + SCTP_TCB_UNLOCK(stcb); + } + } + return; +} +#endif + +#ifdef INET6 +static void +sctp_recv_icmp6_tunneled_packet(udp_tun_icmp_param_t param) +{ + struct ip6ctlparam *ip6cp = param.ip6cp; + struct sctp_inpcb *inp; + struct sctp_tcb *stcb; + struct sctp_nets *net; + struct sctphdr sh; + struct udphdr udp; + struct sockaddr_in6 src, dst; + uint8_t type, code; + + /* + * XXX: We assume that when IPV6 is non NULL, M and OFF are + * valid. + */ + if (ip6cp->ip6c_m == NULL) { + return; + } + /* Check if we can safely examine the ports and the + * verification tag of the SCTP common header. + */ + if (ip6cp->ip6c_m->m_pkthdr.len < + ip6cp->ip6c_off + sizeof(struct udphdr)+ offsetof(struct sctphdr, checksum)) { + return; + } + /* Copy out the UDP header. */ + memset(&udp, 0, sizeof(struct udphdr)); + m_copydata(ip6cp->ip6c_m, + ip6cp->ip6c_off, + sizeof(struct udphdr), + (caddr_t)&udp); + /* Copy out the port numbers and the verification tag. */ + memset(&sh, 0, sizeof(struct sctphdr)); + m_copydata(ip6cp->ip6c_m, + ip6cp->ip6c_off + sizeof(struct udphdr), + sizeof(uint16_t) + sizeof(uint16_t) + sizeof(uint32_t), + (caddr_t)&sh); + memset(&src, 0, sizeof(struct sockaddr_in6)); + src.sin6_family = AF_INET6; +#ifdef HAVE_SIN6_LEN + src.sin6_len = sizeof(struct sockaddr_in6); +#endif + src.sin6_port = sh.src_port; + src.sin6_addr = ip6cp->ip6c_ip6->ip6_src; +#if defined(__FreeBSD__) && !defined(__Userspace__) + if (in6_setscope(&src.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) { + return; + } +#endif + memset(&dst, 0, sizeof(struct sockaddr_in6)); + dst.sin6_family = AF_INET6; +#ifdef HAVE_SIN6_LEN + dst.sin6_len = sizeof(struct sockaddr_in6); +#endif + dst.sin6_port = sh.dest_port; + dst.sin6_addr = ip6cp->ip6c_ip6->ip6_dst; +#if defined(__FreeBSD__) && !defined(__Userspace__) + if (in6_setscope(&dst.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) { + return; + } +#endif + inp = NULL; + net = NULL; + stcb = sctp_findassociation_addr_sa((struct sockaddr *)&dst, + (struct sockaddr *)&src, + &inp, &net, 1, SCTP_DEFAULT_VRFID); + if ((stcb != NULL) && + (net != NULL) && + (inp != NULL)) { + /* Check the UDP port numbers */ + if ((udp.uh_dport != net->port) || + (udp.uh_sport != htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)))) { + SCTP_TCB_UNLOCK(stcb); + return; + } + /* Check the verification tag */ + if (ntohl(sh.v_tag) != 0) { + /* + * This must be the verification tag used for + * sending out packets. We don't consider + * packets reflecting the verification tag. + */ + if (ntohl(sh.v_tag) != stcb->asoc.peer_vtag) { + SCTP_TCB_UNLOCK(stcb); + return; + } + } else { +#if defined(__FreeBSD__) && !defined(__Userspace__) + if (ip6cp->ip6c_m->m_pkthdr.len >= + ip6cp->ip6c_off + sizeof(struct udphdr) + + sizeof(struct sctphdr) + + sizeof(struct sctp_chunkhdr) + + offsetof(struct sctp_init, a_rwnd)) { + /* + * In this case we can check if we + * got an INIT chunk and if the + * initiate tag matches. + */ + uint32_t initiate_tag; + uint8_t chunk_type; + + m_copydata(ip6cp->ip6c_m, + ip6cp->ip6c_off + + sizeof(struct udphdr) + + sizeof(struct sctphdr), + sizeof(uint8_t), + (caddr_t)&chunk_type); + m_copydata(ip6cp->ip6c_m, + ip6cp->ip6c_off + + sizeof(struct udphdr) + + sizeof(struct sctphdr) + + sizeof(struct sctp_chunkhdr), + sizeof(uint32_t), + (caddr_t)&initiate_tag); + if ((chunk_type != SCTP_INITIATION) || + (ntohl(initiate_tag) != stcb->asoc.my_vtag)) { + SCTP_TCB_UNLOCK(stcb); + return; + } + } else { + SCTP_TCB_UNLOCK(stcb); + return; + } +#else + SCTP_TCB_UNLOCK(stcb); + return; +#endif + } + type = ip6cp->ip6c_icmp6->icmp6_type; + code = ip6cp->ip6c_icmp6->icmp6_code; + if ((type == ICMP6_DST_UNREACH) && + (code == ICMP6_DST_UNREACH_NOPORT)) { + type = ICMP6_PARAM_PROB; + code = ICMP6_PARAMPROB_NEXTHEADER; + } + sctp6_notify(inp, stcb, net, type, code, + ntohl(ip6cp->ip6c_icmp6->icmp6_mtu)); +#if defined(__Userspace__) + if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) && + (stcb->sctp_socket != NULL)) { + struct socket *upcall_socket; + + upcall_socket = stcb->sctp_socket; + SOCK_LOCK(upcall_socket); + soref(upcall_socket); + SOCK_UNLOCK(upcall_socket); + if ((upcall_socket->so_upcall != NULL) && + (upcall_socket->so_error != 0)) { + (*upcall_socket->so_upcall)(upcall_socket, upcall_socket->so_upcallarg, M_NOWAIT); + } + ACCEPT_LOCK(); + SOCK_LOCK(upcall_socket); + sorele(upcall_socket); + } +#endif + } else { + if ((stcb == NULL) && (inp != NULL)) { + /* reduce inp's ref-count */ + SCTP_INP_WLOCK(inp); + SCTP_INP_DECR_REF(inp); + SCTP_INP_WUNLOCK(inp); + } + if (stcb) { + SCTP_TCB_UNLOCK(stcb); + } + } +} +#endif + +void +sctp_over_udp_stop(void) +{ + /* + * This function assumes sysctl caller holds sctp_sysctl_info_lock() for writing! + */ +#ifdef INET + if (SCTP_BASE_INFO(udp4_tun_socket) != NULL) { + soclose(SCTP_BASE_INFO(udp4_tun_socket)); + SCTP_BASE_INFO(udp4_tun_socket) = NULL; + } +#endif +#ifdef INET6 + if (SCTP_BASE_INFO(udp6_tun_socket) != NULL) { + soclose(SCTP_BASE_INFO(udp6_tun_socket)); + SCTP_BASE_INFO(udp6_tun_socket) = NULL; + } +#endif +} + +int +sctp_over_udp_start(void) +{ + uint16_t port; + int ret; +#ifdef INET + struct sockaddr_in sin; +#endif +#ifdef INET6 + struct sockaddr_in6 sin6; +#endif + /* + * This function assumes sysctl caller holds sctp_sysctl_info_lock() for writing! + */ + port = SCTP_BASE_SYSCTL(sctp_udp_tunneling_port); + if (ntohs(port) == 0) { + /* Must have a port set */ + return (EINVAL); + } +#ifdef INET + if (SCTP_BASE_INFO(udp4_tun_socket) != NULL) { + /* Already running -- must stop first */ + return (EALREADY); + } +#endif +#ifdef INET6 + if (SCTP_BASE_INFO(udp6_tun_socket) != NULL) { + /* Already running -- must stop first */ + return (EALREADY); + } +#endif +#ifdef INET + if ((ret = socreate(PF_INET, &SCTP_BASE_INFO(udp4_tun_socket), + SOCK_DGRAM, IPPROTO_UDP, + curthread->td_ucred, curthread))) { + sctp_over_udp_stop(); + return (ret); + } + /* Call the special UDP hook. */ + if ((ret = udp_set_kernel_tunneling(SCTP_BASE_INFO(udp4_tun_socket), + sctp_recv_udp_tunneled_packet, + sctp_recv_icmp_tunneled_packet, + NULL))) { + sctp_over_udp_stop(); + return (ret); + } + /* Ok, we have a socket, bind it to the port. */ + memset(&sin, 0, sizeof(struct sockaddr_in)); + sin.sin_len = sizeof(struct sockaddr_in); + sin.sin_family = AF_INET; + sin.sin_port = htons(port); + if ((ret = sobind(SCTP_BASE_INFO(udp4_tun_socket), + (struct sockaddr *)&sin, curthread))) { + sctp_over_udp_stop(); + return (ret); + } +#endif +#ifdef INET6 + if ((ret = socreate(PF_INET6, &SCTP_BASE_INFO(udp6_tun_socket), + SOCK_DGRAM, IPPROTO_UDP, + curthread->td_ucred, curthread))) { + sctp_over_udp_stop(); + return (ret); + } + /* Call the special UDP hook. */ + if ((ret = udp_set_kernel_tunneling(SCTP_BASE_INFO(udp6_tun_socket), + sctp_recv_udp_tunneled_packet, + sctp_recv_icmp6_tunneled_packet, + NULL))) { + sctp_over_udp_stop(); + return (ret); + } + /* Ok, we have a socket, bind it to the port. */ + memset(&sin6, 0, sizeof(struct sockaddr_in6)); + sin6.sin6_len = sizeof(struct sockaddr_in6); + sin6.sin6_family = AF_INET6; + sin6.sin6_port = htons(port); + if ((ret = sobind(SCTP_BASE_INFO(udp6_tun_socket), + (struct sockaddr *)&sin6, curthread))) { + sctp_over_udp_stop(); + return (ret); + } +#endif + return (0); +} +#endif + +/* + * sctp_min_mtu ()returns the minimum of all non-zero arguments. + * If all arguments are zero, zero is returned. + */ +uint32_t +sctp_min_mtu(uint32_t mtu1, uint32_t mtu2, uint32_t mtu3) +{ + if (mtu1 > 0) { + if (mtu2 > 0) { + if (mtu3 > 0) { + return (min(mtu1, min(mtu2, mtu3))); + } else { + return (min(mtu1, mtu2)); + } + } else { + if (mtu3 > 0) { + return (min(mtu1, mtu3)); + } else { + return (mtu1); + } + } + } else { + if (mtu2 > 0) { + if (mtu3 > 0) { + return (min(mtu2, mtu3)); + } else { + return (mtu2); + } + } else { + return (mtu3); + } + } +} + +#if defined(__FreeBSD__) && !defined(__Userspace__) +void +sctp_hc_set_mtu(union sctp_sockstore *addr, uint16_t fibnum, uint32_t mtu) +{ + struct in_conninfo inc; + + memset(&inc, 0, sizeof(struct in_conninfo)); + inc.inc_fibnum = fibnum; + switch (addr->sa.sa_family) { +#ifdef INET + case AF_INET: + inc.inc_faddr = addr->sin.sin_addr; + break; +#endif +#ifdef INET6 + case AF_INET6: + inc.inc_flags |= INC_ISIPV6; + inc.inc6_faddr = addr->sin6.sin6_addr; + break; +#endif + default: + return; + } + tcp_hc_updatemtu(&inc, (u_long)mtu); +} + +uint32_t +sctp_hc_get_mtu(union sctp_sockstore *addr, uint16_t fibnum) +{ + struct in_conninfo inc; + + memset(&inc, 0, sizeof(struct in_conninfo)); + inc.inc_fibnum = fibnum; + switch (addr->sa.sa_family) { +#ifdef INET + case AF_INET: + inc.inc_faddr = addr->sin.sin_addr; + break; +#endif +#ifdef INET6 + case AF_INET6: + inc.inc_flags |= INC_ISIPV6; + inc.inc6_faddr = addr->sin6.sin6_addr; + break; +#endif + default: + return (0); + } + return ((uint32_t)tcp_hc_getmtu(&inc)); +} +#endif + +void +sctp_set_state(struct sctp_tcb *stcb, int new_state) +{ +#if defined(KDTRACE_HOOKS) + int old_state = stcb->asoc.state; +#endif + + KASSERT((new_state & ~SCTP_STATE_MASK) == 0, + ("sctp_set_state: Can't set substate (new_state = %x)", + new_state)); + stcb->asoc.state = (stcb->asoc.state & ~SCTP_STATE_MASK) | new_state; + if ((new_state == SCTP_STATE_SHUTDOWN_RECEIVED) || + (new_state == SCTP_STATE_SHUTDOWN_SENT) || + (new_state == SCTP_STATE_SHUTDOWN_ACK_SENT)) { + SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_SHUTDOWN_PENDING); + } +#if defined(KDTRACE_HOOKS) + if (((old_state & SCTP_STATE_MASK) != new_state) && + !(((old_state & SCTP_STATE_MASK) == SCTP_STATE_EMPTY) && + (new_state == SCTP_STATE_INUSE))) { + SCTP_PROBE6(state__change, NULL, stcb, NULL, stcb, NULL, old_state); + } +#endif +} + +void +sctp_add_substate(struct sctp_tcb *stcb, int substate) +{ +#if defined(KDTRACE_HOOKS) + int old_state = stcb->asoc.state; +#endif + + KASSERT((substate & SCTP_STATE_MASK) == 0, + ("sctp_add_substate: Can't set state (substate = %x)", + substate)); + stcb->asoc.state |= substate; +#if defined(KDTRACE_HOOKS) + if (((substate & SCTP_STATE_ABOUT_TO_BE_FREED) && + ((old_state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) || + ((substate & SCTP_STATE_SHUTDOWN_PENDING) && + ((old_state & SCTP_STATE_SHUTDOWN_PENDING) == 0))) { + SCTP_PROBE6(state__change, NULL, stcb, NULL, stcb, NULL, old_state); + } +#endif +} + |