diff options
Diffstat (limited to '')
| -rw-r--r-- | netwerk/sctp/src/netinet6/sctp6_usrreq.c | 1809 |
1 files changed, 1809 insertions, 0 deletions
diff --git a/netwerk/sctp/src/netinet6/sctp6_usrreq.c b/netwerk/sctp/src/netinet6/sctp6_usrreq.c new file mode 100644 index 0000000000..1fc81daa87 --- /dev/null +++ b/netwerk/sctp/src/netinet6/sctp6_usrreq.c @@ -0,0 +1,1809 @@ +/*- + * SPDX-License-Identifier: BSD-3-Clause + * + * Copyright (c) 2001-2007, 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: head/sys/netinet6/sctp6_usrreq.c 361895 2020-06-07 14:39:20Z tuexen $"); +#endif + +#include <netinet/sctp_os.h> +#ifdef INET6 +#if defined(__FreeBSD__) && !defined(__Userspace__) +#include <sys/proc.h> +#endif +#include <netinet/sctp_pcb.h> +#include <netinet/sctp_header.h> +#include <netinet/sctp_var.h> +#include <netinet6/sctp6_var.h> +#include <netinet/sctp_sysctl.h> +#include <netinet/sctp_output.h> +#include <netinet/sctp_uio.h> +#include <netinet/sctp_asconf.h> +#include <netinet/sctputil.h> +#include <netinet/sctp_indata.h> +#include <netinet/sctp_timer.h> +#include <netinet/sctp_auth.h> +#include <netinet/sctp_input.h> +#include <netinet/sctp_output.h> +#include <netinet/sctp_bsd_addr.h> +#include <netinet/sctp_crc32.h> +#if !defined(_WIN32) +#include <netinet/icmp6.h> +#include <netinet/udp.h> +#endif +#if defined(__Userspace__) +int ip6_v6only=0; +#endif +#if defined(__Userspace__) +#ifdef INET +void +in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) +{ +#if defined(_WIN32) + uint32_t temp; +#endif + memset(sin, 0, sizeof(*sin)); +#ifdef HAVE_SIN_LEN + sin->sin_len = sizeof(struct sockaddr_in); +#endif + sin->sin_family = AF_INET; + sin->sin_port = sin6->sin6_port; +#if defined(_WIN32) + temp = sin6->sin6_addr.s6_addr16[7]; + temp = temp << 16; + temp = temp | sin6->sin6_addr.s6_addr16[6]; + sin->sin_addr.s_addr = temp; +#else + sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3]; +#endif +} + +void +in6_sin6_2_sin_in_sock(struct sockaddr *nam) +{ + struct sockaddr_in *sin_p; + struct sockaddr_in6 sin6; + + /* save original sockaddr_in6 addr and convert it to sockaddr_in */ + sin6 = *(struct sockaddr_in6 *)nam; + sin_p = (struct sockaddr_in *)nam; + in6_sin6_2_sin(sin_p, &sin6); +} + +void +in6_sin_2_v4mapsin6(const struct sockaddr_in *sin, struct sockaddr_in6 *sin6) +{ + memset(sin6, 0, sizeof(struct sockaddr_in6)); + sin6->sin6_family = AF_INET6; +#ifdef HAVE_SIN6_LEN + sin6->sin6_len = sizeof(struct sockaddr_in6); +#endif + sin6->sin6_port = sin->sin_port; +#if defined(_WIN32) + ((uint32_t *)&sin6->sin6_addr)[0] = 0; + ((uint32_t *)&sin6->sin6_addr)[1] = 0; + ((uint32_t *)&sin6->sin6_addr)[2] = htonl(0xffff); + ((uint32_t *)&sin6->sin6_addr)[3] = sin->sin_addr.s_addr; +#else + sin6->sin6_addr.s6_addr32[0] = 0; + sin6->sin6_addr.s6_addr32[1] = 0; + sin6->sin6_addr.s6_addr32[2] = htonl(0xffff); + sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr; +#endif +} +#endif +#endif + +#if !defined(__Userspace__) +int +#if defined(__APPLE__) || defined(__FreeBSD__) +sctp6_input_with_port(struct mbuf **i_pak, int *offp, uint16_t port) +#else +sctp6_input(struct mbuf **i_pak, int *offp, int proto) +#endif +{ + struct mbuf *m; + int iphlen; + uint32_t vrf_id; + uint8_t ecn_bits; + struct sockaddr_in6 src, dst; + struct ip6_hdr *ip6; + struct sctphdr *sh; + struct sctp_chunkhdr *ch; + int length, offset; + uint8_t compute_crc; +#if defined(__FreeBSD__) + uint32_t mflowid; + uint8_t mflowtype; + uint16_t fibnum; +#endif +#if !(defined(__APPLE__) || defined(__FreeBSD__)) + uint16_t port = 0; +#endif + + iphlen = *offp; + if (SCTP_GET_PKT_VRFID(*i_pak, vrf_id)) { + SCTP_RELEASE_PKT(*i_pak); + return (IPPROTO_DONE); + } + m = SCTP_HEADER_TO_CHAIN(*i_pak); +#ifdef SCTP_MBUF_LOGGING + /* Log in any input mbufs */ + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { + sctp_log_mbc(m, SCTP_MBUF_INPUT); + } +#endif +#ifdef SCTP_PACKET_LOGGING + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) { + sctp_packet_log(m); + } +#endif +#if defined(__FreeBSD__) + SCTPDBG(SCTP_DEBUG_CRCOFFLOAD, + "sctp6_input(): 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); +#endif +#if defined(__APPLE__) + SCTPDBG(SCTP_DEBUG_CRCOFFLOAD, + "sctp6_input(): Packet of length %d received on %s%d with csum_flags 0x%x.\n", + m->m_pkthdr.len, + m->m_pkthdr.rcvif->if_name, + m->m_pkthdr.rcvif->if_unit, + m->m_pkthdr.csum_flags); +#endif +#if defined(_WIN32) && !defined(__Userspace__) + SCTPDBG(SCTP_DEBUG_CRCOFFLOAD, + "sctp6_input(): Packet of length %d received on %s with csum_flags 0x%x.\n", + m->m_pkthdr.len, + m->m_pkthdr.rcvif->if_xname, + m->m_pkthdr.csum_flags); +#endif +#if defined(__FreeBSD__) + mflowid = m->m_pkthdr.flowid; + mflowtype = M_HASHTYPE_GET(m); + fibnum = M_GETFIB(m); +#endif + SCTP_STAT_INCR(sctps_recvpackets); + SCTP_STAT_INCR_COUNTER64(sctps_inpackets); + /* Get IP, SCTP, and first chunk header together in the first mbuf. */ + offset = iphlen + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); + if (m->m_len < offset) { + m = m_pullup(m, offset); + if (m == NULL) { + SCTP_STAT_INCR(sctps_hdrops); + return (IPPROTO_DONE); + } + } + ip6 = mtod(m, struct ip6_hdr *); + sh = (struct sctphdr *)(mtod(m, caddr_t) + iphlen); + ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr)); + offset -= sizeof(struct sctp_chunkhdr); + 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 = ip6->ip6_src; +#if defined(__FreeBSD__) +#if defined(__APPLE__) + /* XXX: This code should also be used on Apple */ +#endif + if (in6_setscope(&src.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) { + goto out; + } +#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 = ip6->ip6_dst; +#if defined(__FreeBSD__) +#if defined(__APPLE__) + /* XXX: This code should also be used on Apple */ +#endif + if (in6_setscope(&dst.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) { + goto out; + } +#endif +#if defined(__APPLE__) +#if defined(NFAITH) && 0 < NFAITH + if (faithprefix(&dst.sin6_addr)) { + goto out; + } +#endif +#endif + length = ntohs(ip6->ip6_plen) + iphlen; + /* Validate mbuf chain length with IP payload length. */ + if (SCTP_HEADER_LEN(m) != length) { + SCTPDBG(SCTP_DEBUG_INPUT1, + "sctp6_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m)); + SCTP_STAT_INCR(sctps_hdrops); + goto out; + } + if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { + goto out; + } + ecn_bits = ((ntohl(ip6->ip6_flow) >> 20) & 0x000000ff); +#if defined(__FreeBSD__) + if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) { + SCTP_STAT_INCR(sctps_recvhwcrc); + compute_crc = 0; + } else { +#else + if (SCTP_BASE_SYSCTL(sctp_no_csum_on_loopback) && + (IN6_ARE_ADDR_EQUAL(&src.sin6_addr, &dst.sin6_addr))) { + SCTP_STAT_INCR(sctps_recvhwcrc); + compute_crc = 0; + } else { +#endif + SCTP_STAT_INCR(sctps_recvswcrc); + compute_crc = 1; + } + sctp_common_input_processing(&m, iphlen, offset, length, + (struct sockaddr *)&src, + (struct sockaddr *)&dst, + sh, ch, + compute_crc, + ecn_bits, +#if defined(__FreeBSD__) + mflowtype, mflowid, fibnum, +#endif + vrf_id, port); + out: + if (m) { + sctp_m_freem(m); + } + return (IPPROTO_DONE); +} + +#if defined(__APPLE__) +int +sctp6_input(struct mbuf **i_pak, int *offp) +{ + return (sctp6_input_with_port(i_pak, offp, 0)); +} +#endif + +#if defined(__FreeBSD__) +int +sctp6_input(struct mbuf **i_pak, int *offp, int proto SCTP_UNUSED) +{ + return (sctp6_input_with_port(i_pak, offp, 0)); +} +#endif + +void +sctp6_notify(struct sctp_inpcb *inp, + struct sctp_tcb *stcb, + struct sctp_nets *net, + uint8_t icmp6_type, + uint8_t icmp6_code, + uint32_t next_mtu) +{ +#if defined(__APPLE__) + struct socket *so; +#endif + int timer_stopped; + + switch (icmp6_type) { + case ICMP6_DST_UNREACH: + if ((icmp6_code == ICMP6_DST_UNREACH_NOROUTE) || + (icmp6_code == ICMP6_DST_UNREACH_ADMIN) || + (icmp6_code == ICMP6_DST_UNREACH_BEYONDSCOPE) || + (icmp6_code == ICMP6_DST_UNREACH_ADDR)) { + /* Mark the net unreachable. */ + if (net->dest_state & SCTP_ADDR_REACHABLE) { + /* Ok that destination is not reachable */ + net->dest_state &= ~SCTP_ADDR_REACHABLE; + net->dest_state &= ~SCTP_ADDR_PF; + sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN, + stcb, 0, (void *)net, SCTP_SO_NOT_LOCKED); + } + } + SCTP_TCB_UNLOCK(stcb); + break; + case ICMP6_PARAM_PROB: + /* Treat it like an ABORT. */ + if (icmp6_code == ICMP6_PARAMPROB_NEXTHEADER) { + sctp_abort_notification(stcb, 1, 0, NULL, SCTP_SO_NOT_LOCKED); +#if defined(__APPLE__) + 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_SCTP_USRREQ + SCTP_LOC_2); +#if defined(__APPLE__) + SCTP_SOCKET_UNLOCK(so, 1); +#endif + } else { + SCTP_TCB_UNLOCK(stcb); + } + break; + case ICMP6_PACKET_TOO_BIG: + if (net->dest_state & SCTP_ADDR_NO_PMTUD) { + SCTP_TCB_UNLOCK(stcb); + break; + } + if (SCTP_OS_TIMER_PENDING(&net->pmtu_timer.timer)) { + timer_stopped = 1; + sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net, + SCTP_FROM_SCTP_USRREQ + SCTP_LOC_1); + } else { + timer_stopped = 0; + } + /* Update the path MTU. */ + if (net->port) { + next_mtu -= sizeof(struct udphdr); + } + if (net->mtu > next_mtu) { + net->mtu = next_mtu; +#if defined(__FreeBSD__) + if (net->port) { + sctp_hc_set_mtu(&net->ro._l_addr, inp->fibnum, next_mtu + sizeof(struct udphdr)); + } else { + sctp_hc_set_mtu(&net->ro._l_addr, inp->fibnum, next_mtu); + } +#endif + } + /* Update the association MTU */ + if (stcb->asoc.smallest_mtu > next_mtu) { + sctp_pathmtu_adjustment(stcb, next_mtu); + } + /* Finally, start the PMTU timer if it was running before. */ + if (timer_stopped) { + sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net); + } + SCTP_TCB_UNLOCK(stcb); + break; + default: + SCTP_TCB_UNLOCK(stcb); + break; + } +} + +void +#if defined(__APPLE__) && !defined(APPLE_LEOPARD) && !defined(APPLE_SNOWLEOPARD) && !defined(APPLE_LION) && !defined(APPLE_MOUNTAINLION) && !defined(APPLE_ELCAPITAN) +sctp6_ctlinput(int cmd, struct sockaddr *pktdst, void *d, struct ifnet *ifp SCTP_UNUSED) +#else +sctp6_ctlinput(int cmd, struct sockaddr *pktdst, void *d) +#endif +{ + struct ip6ctlparam *ip6cp; + struct sctp_inpcb *inp; + struct sctp_tcb *stcb; + struct sctp_nets *net; + struct sctphdr sh; + struct sockaddr_in6 src, dst; + +#ifdef HAVE_SA_LEN + if (pktdst->sa_family != AF_INET6 || + pktdst->sa_len != sizeof(struct sockaddr_in6)) { +#else + if (pktdst->sa_family != AF_INET6) { +#endif + return; + } + + if ((unsigned)cmd >= PRC_NCMDS) { + return; + } + if (PRC_IS_REDIRECT(cmd)) { + d = NULL; + } else if (inet6ctlerrmap[cmd] == 0) { + return; + } + /* If the parameter is from icmp6, decode it. */ + if (d != NULL) { + ip6cp = (struct ip6ctlparam *)d; + } else { + ip6cp = (struct ip6ctlparam *)NULL; + } + + if (ip6cp != NULL) { + /* + * 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 < + (int32_t)(ip6cp->ip6c_off + offsetof(struct sctphdr, checksum))) { + return; + } + + /* Copy out the port numbers and the verification tag. */ + memset(&sh, 0, sizeof(sh)); + m_copydata(ip6cp->ip6c_m, + ip6cp->ip6c_off, + 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__) + 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__) + 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 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__) + if (ip6cp->ip6c_m->m_pkthdr.len >= + ip6cp->ip6c_off + 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 sctphdr), + sizeof(uint8_t), + (caddr_t)&chunk_type); + m_copydata(ip6cp->ip6c_m, + ip6cp->ip6c_off + + 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 + } + sctp6_notify(inp, stcb, net, + ip6cp->ip6c_icmp6->icmp6_type, + ip6cp->ip6c_icmp6->icmp6_code, + ntohl(ip6cp->ip6c_icmp6->icmp6_mtu)); +#if defined(__Userspace__) + if (!(stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) && + (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 + +/* + * this routine can probably be collasped into the one in sctp_userreq.c + * since they do the same thing and now we lookup with a sockaddr + */ +#if defined(__FreeBSD__) && !defined(__Userspace__) +static int +sctp6_getcred(SYSCTL_HANDLER_ARGS) +{ + struct xucred xuc; + struct sockaddr_in6 addrs[2]; + struct sctp_inpcb *inp; + struct sctp_nets *net; + struct sctp_tcb *stcb; + int error; + uint32_t vrf_id; + + vrf_id = SCTP_DEFAULT_VRFID; + +#if defined(__FreeBSD__) && !defined(__Userspace__) + error = priv_check(req->td, PRIV_NETINET_GETCRED); +#else + error = suser(req->p); +#endif + if (error) + return (error); + + if (req->newlen != sizeof(addrs)) { + SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); + return (EINVAL); + } + if (req->oldlen != sizeof(struct ucred)) { + SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); + return (EINVAL); + } + error = SYSCTL_IN(req, addrs, sizeof(addrs)); + if (error) + return (error); + + stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[1]), + sin6tosa(&addrs[0]), + &inp, &net, 1, vrf_id); + if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) { + if ((inp != NULL) && (stcb == NULL)) { + /* reduce ref-count */ + SCTP_INP_WLOCK(inp); + SCTP_INP_DECR_REF(inp); + goto cred_can_cont; + } + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); + error = ENOENT; + goto out; + } + SCTP_TCB_UNLOCK(stcb); + /* We use the write lock here, only + * since in the error leg we need it. + * If we used RLOCK, then we would have + * to wlock/decr/unlock/rlock. Which + * in theory could create a hole. Better + * to use higher wlock. + */ + SCTP_INP_WLOCK(inp); + cred_can_cont: + error = cr_canseesocket(req->td->td_ucred, inp->sctp_socket); + if (error) { + SCTP_INP_WUNLOCK(inp); + goto out; + } + cru2x(inp->sctp_socket->so_cred, &xuc); + SCTP_INP_WUNLOCK(inp); + error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); +out: + return (error); +} + +SYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred, CTLTYPE_OPAQUE | CTLFLAG_RW, + 0, 0, + sctp6_getcred, "S,ucred", "Get the ucred of a SCTP6 connection"); + +#endif + +/* This is the same as the sctp_abort() could be made common */ +#if defined(__Userspace__) +int +#elif defined(__FreeBSD__) || defined(_WIN32) +static void +#else +static int +#endif +sctp6_abort(struct socket *so) +{ +#if defined(__FreeBSD__) && !defined(__Userspace__) + struct epoch_tracker et; +#endif + struct sctp_inpcb *inp; + uint32_t flags; + + inp = (struct sctp_inpcb *)so->so_pcb; + if (inp == NULL) { + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); +#if (defined(__FreeBSD__) || defined(_WIN32)) && !defined(__Userspace__) + return; +#else + return (EINVAL); +#endif + } +#if defined(__FreeBSD__) && !defined(__Userspace__) + NET_EPOCH_ENTER(et); +#endif + sctp_must_try_again: + flags = inp->sctp_flags; +#ifdef SCTP_LOG_CLOSING + sctp_log_closing(inp, NULL, 17); +#endif + if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) && + (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) { +#ifdef SCTP_LOG_CLOSING + sctp_log_closing(inp, NULL, 16); +#endif + sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT, + SCTP_CALLED_AFTER_CMPSET_OFCLOSE); + SOCK_LOCK(so); + SCTP_SB_CLEAR(so->so_snd); + /* same for the rcv ones, they are only + * here for the accounting/select. + */ + SCTP_SB_CLEAR(so->so_rcv); +#if defined(__APPLE__) && !defined(__Userspace__) + so->so_usecount--; +#else + /* Now null out the reference, we are completely detached. */ + so->so_pcb = NULL; +#endif + SOCK_UNLOCK(so); + } else { + flags = inp->sctp_flags; + if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) { + goto sctp_must_try_again; + } + } +#if defined(__FreeBSD__) && !defined(__Userspace__) + NET_EPOCH_EXIT(et); + return; +#else + return (0); +#endif +} + +#if defined(__Userspace__) +int +sctp6_attach(struct socket *so, int proto SCTP_UNUSED, uint32_t vrf_id) +#elif defined(__FreeBSD__) +static int +sctp6_attach(struct socket *so, int proto SCTP_UNUSED, struct thread *p SCTP_UNUSED) +#elif defined(_WIN32) +static int +sctp6_attach(struct socket *so, int proto SCTP_UNUSED, PKTHREAD p SCTP_UNUSED) +#else +static int +sctp6_attach(struct socket *so, int proto SCTP_UNUSED, struct proc *p SCTP_UNUSED) +#endif +{ + int error; + struct sctp_inpcb *inp; +#if !defined(__Userspace__) + uint32_t vrf_id = SCTP_DEFAULT_VRFID; +#endif + + inp = (struct sctp_inpcb *)so->so_pcb; + if (inp != NULL) { + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); + return (EINVAL); + } + + if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { + error = SCTP_SORESERVE(so, SCTP_BASE_SYSCTL(sctp_sendspace), SCTP_BASE_SYSCTL(sctp_recvspace)); + if (error) + return (error); + } + error = sctp_inpcb_alloc(so, vrf_id); + if (error) + return (error); + inp = (struct sctp_inpcb *)so->so_pcb; + SCTP_INP_WLOCK(inp); + inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6; /* I'm v6! */ + + inp->ip_inp.inp.inp_vflag |= INP_IPV6; + inp->ip_inp.inp.in6p_hops = -1; /* use kernel default */ + inp->ip_inp.inp.in6p_cksum = -1; /* just to be sure */ +#ifdef INET + /* + * XXX: ugly!! IPv4 TTL initialization is necessary for an IPv6 + * socket as well, because the socket may be bound to an IPv6 + * wildcard address, which may match an IPv4-mapped IPv6 address. + */ + inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); +#endif + SCTP_INP_WUNLOCK(inp); + return (0); +} + +#if defined(__Userspace__) +int +sctp6_bind(struct socket *so, struct sockaddr *addr, void * p) +{ +#elif defined(__FreeBSD__) +static int +sctp6_bind(struct socket *so, struct sockaddr *addr, struct thread *p) +{ +#elif defined(__APPLE__) +static int +sctp6_bind(struct socket *so, struct sockaddr *addr, struct proc *p) +{ +#elif defined(_WIN32) +static int +sctp6_bind(struct socket *so, struct sockaddr *addr, PKTHREAD p) +{ +#else +static int +sctp6_bind(struct socket *so, struct mbuf *nam, struct proc *p) +{ + struct sockaddr *addr = nam ? mtod(nam, struct sockaddr *): NULL; + +#endif + struct sctp_inpcb *inp; + int error; + u_char vflagsav; + + inp = (struct sctp_inpcb *)so->so_pcb; + if (inp == NULL) { + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); + return (EINVAL); + } + +#if !(defined(_WIN32) && !defined(__Userspace__)) + if (addr) { + switch (addr->sa_family) { +#ifdef INET + case AF_INET: +#ifdef HAVE_SA_LEN + if (addr->sa_len != sizeof(struct sockaddr_in)) { + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); + return (EINVAL); + } +#endif + break; +#endif +#ifdef INET6 + case AF_INET6: +#ifdef HAVE_SA_LEN + if (addr->sa_len != sizeof(struct sockaddr_in6)) { + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); + return (EINVAL); + } +#endif + break; +#endif + default: + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); + return (EINVAL); + } + } +#endif + vflagsav = inp->ip_inp.inp.inp_vflag; + inp->ip_inp.inp.inp_vflag &= ~INP_IPV4; + inp->ip_inp.inp.inp_vflag |= INP_IPV6; + if ((addr != NULL) && (SCTP_IPV6_V6ONLY(inp) == 0)) { + switch (addr->sa_family) { +#ifdef INET + case AF_INET: + /* binding v4 addr to v6 socket, so reset flags */ + inp->ip_inp.inp.inp_vflag |= INP_IPV4; + inp->ip_inp.inp.inp_vflag &= ~INP_IPV6; + break; +#endif +#ifdef INET6 + case AF_INET6: + { + struct sockaddr_in6 *sin6_p; + + sin6_p = (struct sockaddr_in6 *)addr; + + if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) { + inp->ip_inp.inp.inp_vflag |= INP_IPV4; + } +#ifdef INET + if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { + struct sockaddr_in sin; + + in6_sin6_2_sin(&sin, sin6_p); + inp->ip_inp.inp.inp_vflag |= INP_IPV4; + inp->ip_inp.inp.inp_vflag &= ~INP_IPV6; + error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, NULL, p); + goto out; + } +#endif + break; + } +#endif + default: + break; + } + } else if (addr != NULL) { + struct sockaddr_in6 *sin6_p; + + /* IPV6_V6ONLY socket */ +#ifdef INET + if (addr->sa_family == AF_INET) { + /* can't bind v4 addr to v6 only socket! */ + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); + error = EINVAL; + goto out; + } +#endif + sin6_p = (struct sockaddr_in6 *)addr; + + if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { + /* can't bind v4-mapped addrs either! */ + /* NOTE: we don't support SIIT */ + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); + error = EINVAL; + goto out; + } + } + error = sctp_inpcb_bind(so, addr, NULL, p); +out: + if (error != 0) + inp->ip_inp.inp.inp_vflag = vflagsav; + return (error); +} + + +#if defined(__FreeBSD__) || defined(_WIN32) || defined(__Userspace__) +#if !defined(__Userspace__) +static void +#else +void +#endif +sctp6_close(struct socket *so) +{ + sctp_close(so); +} + +/* This could be made common with sctp_detach() since they are identical */ +#else + +static +int +sctp6_detach(struct socket *so) +{ +#if defined(__Userspace__) + sctp_close(so); + return (0); +#else + return (sctp_detach(so)); +#endif +} + +#endif + +#if !defined(__Userspace__) +static +#endif +int +sctp6_disconnect(struct socket *so) +{ + return (sctp_disconnect(so)); +} + + +int +#if defined(__FreeBSD__) && !defined(__Userspace__) +sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, + struct mbuf *control, struct thread *p); + +#else +sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, + struct mbuf *control, struct proc *p); + +#endif + +#if !defined(_WIN32) && !defined(__Userspace__) +#if defined(__FreeBSD__) +static int +sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, + struct mbuf *control, struct thread *p) +{ +#elif defined(__APPLE__) +static int +sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, + struct mbuf *control, struct proc *p) +{ +#else +static int +sctp6_send(struct socket *so, int flags, struct mbuf *m, struct mbuf *nam, + struct mbuf *control, struct proc *p) +{ + struct sockaddr *addr = nam ? mtod(nam, struct sockaddr *): NULL; +#endif + struct sctp_inpcb *inp; + +#ifdef INET + struct sockaddr_in6 *sin6; +#endif /* INET */ + /* No SPL needed since sctp_output does this */ + + inp = (struct sctp_inpcb *)so->so_pcb; + if (inp == NULL) { + if (control) { + SCTP_RELEASE_PKT(control); + control = NULL; + } + SCTP_RELEASE_PKT(m); + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); + return (EINVAL); + } + /* + * For the TCP model we may get a NULL addr, if we are a connected + * socket thats ok. + */ + if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) && + (addr == NULL)) { + goto connected_type; + } + if (addr == NULL) { + SCTP_RELEASE_PKT(m); + if (control) { + SCTP_RELEASE_PKT(control); + control = NULL; + } + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EDESTADDRREQ); + return (EDESTADDRREQ); + } +#ifdef INET + sin6 = (struct sockaddr_in6 *)addr; + if (SCTP_IPV6_V6ONLY(inp)) { + /* + * if IPV6_V6ONLY flag, we discard datagrams destined to a + * v4 addr or v4-mapped addr + */ + if (addr->sa_family == AF_INET) { + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); + return (EINVAL); + } + if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); + return (EINVAL); + } + } + if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { + struct sockaddr_in sin; + + /* convert v4-mapped into v4 addr and send */ + in6_sin6_2_sin(&sin, sin6); + return (sctp_sendm(so, flags, m, (struct sockaddr *)&sin, control, p)); + } +#endif /* INET */ +connected_type: + /* now what about control */ + if (control) { + if (inp->control) { + SCTP_PRINTF("huh? control set?\n"); + SCTP_RELEASE_PKT(inp->control); + inp->control = NULL; + } + inp->control = control; + } + /* Place the data */ + if (inp->pkt) { + SCTP_BUF_NEXT(inp->pkt_last) = m; + inp->pkt_last = m; + } else { + inp->pkt_last = inp->pkt = m; + } + if ( +#if (defined(__FreeBSD__) || defined(__APPLE__)) && !defined(__Userspace__) + /* FreeBSD and MacOSX uses a flag passed */ + ((flags & PRUS_MORETOCOME) == 0) +#else + 1 /* Open BSD does not have any "more to come" + * indication */ +#endif + ) { + /* + * note with the current version this code will only be used + * by OpenBSD, NetBSD and FreeBSD have methods for + * re-defining sosend() to use sctp_sosend(). One can + * optionaly switch back to this code (by changing back the + * defininitions but this is not advisable. + */ +#if defined(__FreeBSD__) && !defined(__Userspace__) + struct epoch_tracker et; +#endif + int ret; + +#if defined(__FreeBSD__) && !defined(__Userspace__) + NET_EPOCH_ENTER(et); +#endif + ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags); +#if defined(__FreeBSD__) && !defined(__Userspace__) + NET_EPOCH_EXIT(et); +#endif + inp->pkt = NULL; + inp->control = NULL; + return (ret); + } else { + return (0); + } +} +#endif + +#if defined(__Userspace__) +int +sctp6_connect(struct socket *so, struct sockaddr *addr) +{ + void *p = NULL; +#elif defined(__FreeBSD__) +static int +sctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p) +{ +#elif defined(__APPLE__) +static int +sctp6_connect(struct socket *so, struct sockaddr *addr, struct proc *p) +{ +#elif defined(_WIN32) +static int +sctp6_connect(struct socket *so, struct sockaddr *addr, PKTHREAD p) +{ +#else +static int +sctp6_connect(struct socket *so, struct mbuf *nam, struct proc *p) +{ + struct sockaddr *addr = mtod(nam, struct sockaddr *); +#endif +#if defined(__FreeBSD__) && !defined(__Userspace__) + struct epoch_tracker et; +#endif + uint32_t vrf_id; + int error = 0; + struct sctp_inpcb *inp; + struct sctp_tcb *stcb; +#ifdef INET + struct sockaddr_in6 *sin6; + union sctp_sockstore store; +#endif + + inp = (struct sctp_inpcb *)so->so_pcb; + if (inp == NULL) { + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); + return (ECONNRESET); /* I made the same as TCP since we are + * not setup? */ + } + if (addr == NULL) { + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); + return (EINVAL); + } +#if !(defined(_WIN32) && !defined(__Userspace__)) + switch (addr->sa_family) { +#ifdef INET + case AF_INET: +#ifdef HAVE_SA_LEN + if (addr->sa_len != sizeof(struct sockaddr_in)) { + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); + return (EINVAL); + } +#endif + break; +#endif +#ifdef INET6 + case AF_INET6: +#ifdef HAVE_SA_LEN + if (addr->sa_len != sizeof(struct sockaddr_in6)) { + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); + return (EINVAL); + } +#endif + break; +#endif + default: + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); + return (EINVAL); + } +#endif + + vrf_id = inp->def_vrf_id; + SCTP_ASOC_CREATE_LOCK(inp); + SCTP_INP_RLOCK(inp); + if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == + SCTP_PCB_FLAGS_UNBOUND) { + /* Bind a ephemeral port */ + SCTP_INP_RUNLOCK(inp); + error = sctp6_bind(so, NULL, p); + if (error) { + SCTP_ASOC_CREATE_UNLOCK(inp); + + return (error); + } + SCTP_INP_RLOCK(inp); + } + if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && + (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) { + /* We are already connected AND the TCP model */ + SCTP_INP_RUNLOCK(inp); + SCTP_ASOC_CREATE_UNLOCK(inp); + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EADDRINUSE); + return (EADDRINUSE); + } +#ifdef INET + sin6 = (struct sockaddr_in6 *)addr; + if (SCTP_IPV6_V6ONLY(inp)) { + /* + * if IPV6_V6ONLY flag, ignore connections destined to a v4 + * addr or v4-mapped addr + */ + if (addr->sa_family == AF_INET) { + SCTP_INP_RUNLOCK(inp); + SCTP_ASOC_CREATE_UNLOCK(inp); + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); + return (EINVAL); + } + if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { + SCTP_INP_RUNLOCK(inp); + SCTP_ASOC_CREATE_UNLOCK(inp); + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); + return (EINVAL); + } + } + if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { + /* convert v4-mapped into v4 addr */ + in6_sin6_2_sin(&store.sin, sin6); + addr = &store.sa; + } +#endif /* INET */ + /* Now do we connect? */ + if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { + stcb = LIST_FIRST(&inp->sctp_asoc_list); + if (stcb) { + SCTP_TCB_LOCK(stcb); + } + SCTP_INP_RUNLOCK(inp); + } else { + SCTP_INP_RUNLOCK(inp); + SCTP_INP_WLOCK(inp); + SCTP_INP_INCR_REF(inp); + SCTP_INP_WUNLOCK(inp); + stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL); + if (stcb == NULL) { + SCTP_INP_WLOCK(inp); + SCTP_INP_DECR_REF(inp); + SCTP_INP_WUNLOCK(inp); + } + } + + if (stcb != NULL) { + /* Already have or am bring up an association */ + SCTP_ASOC_CREATE_UNLOCK(inp); + SCTP_TCB_UNLOCK(stcb); + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EALREADY); + return (EALREADY); + } + /* We are GOOD to go */ + stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id, + inp->sctp_ep.pre_open_stream_count, + inp->sctp_ep.port, p, + SCTP_INITIALIZE_AUTH_PARAMS); + SCTP_ASOC_CREATE_UNLOCK(inp); + if (stcb == NULL) { + /* Gak! no memory */ + return (error); + } + if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { + stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; + /* Set the connected flag so we can queue data */ + soisconnecting(so); + } + SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT); + (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered); +#if defined(__FreeBSD__) && !defined(__Userspace__) + NET_EPOCH_ENTER(et); +#endif + sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED); + SCTP_TCB_UNLOCK(stcb); +#if defined(__FreeBSD__) && !defined(__Userspace__) + NET_EPOCH_EXIT(et); +#endif + return (error); +} + +static int +#if !defined(__Userspace__) +sctp6_getaddr(struct socket *so, struct sockaddr **addr) +{ + struct sockaddr_in6 *sin6; +#else +sctp6_getaddr(struct socket *so, struct mbuf *nam) +{ + struct sockaddr_in6 *sin6 = mtod(nam, struct sockaddr_in6 *); +#endif + struct sctp_inpcb *inp; + uint32_t vrf_id; + struct sctp_ifa *sctp_ifa; + +#if defined(SCTP_KAME) && defined(SCTP_EMBEDDED_V6_SCOPE) + int error; +#endif + + /* + * Do the malloc first in case it blocks. + */ +#if !defined(__Userspace__) + SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof(*sin6)); + if (sin6 == NULL) + return (ENOMEM); +#else + SCTP_BUF_LEN(nam) = sizeof(*sin6); + memset(sin6, 0, sizeof(*sin6)); +#endif + sin6->sin6_family = AF_INET6; +#ifdef HAVE_SIN6_LEN + sin6->sin6_len = sizeof(*sin6); +#endif + + inp = (struct sctp_inpcb *)so->so_pcb; + if (inp == NULL) { +#if !defined(__Userspace__) + SCTP_FREE_SONAME(sin6); +#endif + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); + return (ECONNRESET); + } + SCTP_INP_RLOCK(inp); + sin6->sin6_port = inp->sctp_lport; + if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { + /* For the bound all case you get back 0 */ + if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { + struct sctp_tcb *stcb; + struct sockaddr_in6 *sin_a6; + struct sctp_nets *net; + int fnd; + stcb = LIST_FIRST(&inp->sctp_asoc_list); + if (stcb == NULL) { + SCTP_INP_RUNLOCK(inp); +#if !defined(__Userspace__) + SCTP_FREE_SONAME(sin6); +#endif + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); + return (ENOENT); + } + fnd = 0; + sin_a6 = NULL; + TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { + sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; + if (sin_a6 == NULL) + /* this will make coverity happy */ + continue; + + if (sin_a6->sin6_family == AF_INET6) { + fnd = 1; + break; + } + } + if ((!fnd) || (sin_a6 == NULL)) { + /* punt */ + SCTP_INP_RUNLOCK(inp); +#if !defined(__Userspace__) + SCTP_FREE_SONAME(sin6); +#endif + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); + return (ENOENT); + } + vrf_id = inp->def_vrf_id; + sctp_ifa = sctp_source_address_selection(inp, stcb, (sctp_route_t *)&net->ro, net, 0, vrf_id); + if (sctp_ifa) { + sin6->sin6_addr = sctp_ifa->address.sin6.sin6_addr; + } + } else { + /* For the bound all case you get back 0 */ + memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr)); + } + } else { + /* Take the first IPv6 address in the list */ + struct sctp_laddr *laddr; + int fnd = 0; + + LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { + if (laddr->ifa->address.sa.sa_family == AF_INET6) { + struct sockaddr_in6 *sin_a; + + sin_a = &laddr->ifa->address.sin6; + sin6->sin6_addr = sin_a->sin6_addr; + fnd = 1; + break; + } + } + if (!fnd) { +#if !defined(__Userspace__) + SCTP_FREE_SONAME(sin6); +#endif + SCTP_INP_RUNLOCK(inp); + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); + return (ENOENT); + } + } + SCTP_INP_RUNLOCK(inp); + /* Scoping things for v6 */ +#ifdef SCTP_EMBEDDED_V6_SCOPE +#ifdef SCTP_KAME + if ((error = sa6_recoverscope(sin6)) != 0) { + SCTP_FREE_SONAME(sin6); + return (error); + } +#else + if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) + /* skip ifp check below */ + in6_recoverscope(sin6, &sin6->sin6_addr, NULL); + else + sin6->sin6_scope_id = 0; /* XXX */ +#endif /* SCTP_KAME */ +#endif /* SCTP_EMBEDDED_V6_SCOPE */ +#if !defined(__Userspace__) + (*addr) = (struct sockaddr *)sin6; +#endif + return (0); +} + +static int +#if !defined(__Userspace__) +sctp6_peeraddr(struct socket *so, struct sockaddr **addr) +{ + struct sockaddr_in6 *sin6; +#else +sctp6_peeraddr(struct socket *so, struct mbuf *nam) +{ + struct sockaddr_in6 *sin6 = mtod(nam, struct sockaddr_in6 *); +#endif + int fnd; + struct sockaddr_in6 *sin_a6; + struct sctp_inpcb *inp; + struct sctp_tcb *stcb; + struct sctp_nets *net; +#ifdef SCTP_KAME + int error; +#endif + + /* Do the malloc first in case it blocks. */ +#if !defined(__Userspace__) + SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); + if (sin6 == NULL) + return (ENOMEM); +#else + SCTP_BUF_LEN(nam) = sizeof(*sin6); + memset(sin6, 0, sizeof(*sin6)); +#endif + sin6->sin6_family = AF_INET6; +#ifdef HAVE_SIN6_LEN + sin6->sin6_len = sizeof(*sin6); +#endif + + inp = (struct sctp_inpcb *)so->so_pcb; + if ((inp == NULL) || + ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) { + /* UDP type and listeners will drop out here */ +#if !defined(__Userspace__) + SCTP_FREE_SONAME(sin6); +#endif + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOTCONN); + return (ENOTCONN); + } + SCTP_INP_RLOCK(inp); + stcb = LIST_FIRST(&inp->sctp_asoc_list); + if (stcb) { + SCTP_TCB_LOCK(stcb); + } + SCTP_INP_RUNLOCK(inp); + if (stcb == NULL) { +#if !defined(__Userspace__) + SCTP_FREE_SONAME(sin6); +#endif + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); + return (ECONNRESET); + } + fnd = 0; + TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { + sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; + if (sin_a6->sin6_family == AF_INET6) { + fnd = 1; + sin6->sin6_port = stcb->rport; + sin6->sin6_addr = sin_a6->sin6_addr; + break; + } + } + SCTP_TCB_UNLOCK(stcb); + if (!fnd) { + /* No IPv4 address */ +#if !defined(__Userspace__) + SCTP_FREE_SONAME(sin6); +#endif + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); + return (ENOENT); + } +#ifdef SCTP_EMBEDDED_V6_SCOPE +#ifdef SCTP_KAME + if ((error = sa6_recoverscope(sin6)) != 0) { +#if !defined(__Userspace__) + SCTP_FREE_SONAME(sin6); +#endif + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, error); + return (error); + } +#else + in6_recoverscope(sin6, &sin6->sin6_addr, NULL); +#endif /* SCTP_KAME */ +#endif /* SCTP_EMBEDDED_V6_SCOPE */ +#if !defined(__Userspace__) + *addr = (struct sockaddr *)sin6; +#endif + return (0); +} + +#if !defined(__Userspace__) +static int +sctp6_in6getaddr(struct socket *so, struct sockaddr **nam) +{ +#elif defined(__Userspace__) +int +sctp6_in6getaddr(struct socket *so, struct mbuf *nam) +{ +#ifdef INET + struct sockaddr *addr = mtod(nam, struct sockaddr *); +#endif +#else +static int +sctp6_in6getaddr(struct socket *so, struct mbuf *nam) +{ +#ifdef INET + struct sockaddr *addr = mtod(nam, struct sockaddr *); +#endif +#endif + struct inpcb *inp = sotoinpcb(so); + int error; + + if (inp == NULL) { + SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); + return (EINVAL); + } + + /* allow v6 addresses precedence */ + error = sctp6_getaddr(so, nam); +#ifdef INET + if (error) { +#if !defined(__Userspace__) + struct sockaddr_in6 *sin6; +#else + struct sockaddr_in6 sin6; +#endif + + /* try v4 next if v6 failed */ + error = sctp_ingetaddr(so, nam); + if (error) { + return (error); + } +#if !defined(__Userspace__) + SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); + if (sin6 == NULL) { + SCTP_FREE_SONAME(*nam); + return (ENOMEM); + } + in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6); + SCTP_FREE_SONAME(*nam); + *nam = (struct sockaddr *)sin6; +#else + in6_sin_2_v4mapsin6((struct sockaddr_in *)addr, &sin6); + SCTP_BUF_LEN(nam) = sizeof(struct sockaddr_in6); + memcpy(addr, &sin6, sizeof(struct sockaddr_in6)); +#endif + } +#endif + return (error); +} + + +#if !defined(__Userspace__) +static int +sctp6_getpeeraddr(struct socket *so, struct sockaddr **nam) +{ +#elif defined(__Userspace__) +int +sctp6_getpeeraddr(struct socket *so, struct mbuf *nam) +{ +#ifdef INET + struct sockaddr *addr = mtod(nam, struct sockaddr *); +#endif +#else +static +int +sctp6_getpeeraddr(struct socket *so, struct mbuf *nam) +{ +#ifdef INET + struct sockaddr *addr = mtod(nam, struct sockaddr *); +#endif + +#endif + struct inpcb *inp = sotoinpcb(so); + int error; + + if (inp == NULL) { + SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); + return (EINVAL); + } + + /* allow v6 addresses precedence */ + error = sctp6_peeraddr(so, nam); +#ifdef INET + if (error) { +#if !defined(__Userspace__) + struct sockaddr_in6 *sin6; +#else + struct sockaddr_in6 sin6; +#endif + + /* try v4 next if v6 failed */ + error = sctp_peeraddr(so, nam); + if (error) { + return (error); + } +#if !defined(__Userspace__) + SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); + if (sin6 == NULL) { + SCTP_FREE_SONAME(*nam); + return (ENOMEM); + } + in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6); + SCTP_FREE_SONAME(*nam); + *nam = (struct sockaddr *)sin6; +#else + in6_sin_2_v4mapsin6((struct sockaddr_in *)addr, &sin6); + SCTP_BUF_LEN(nam) = sizeof(struct sockaddr_in6); + memcpy(addr, &sin6, sizeof(struct sockaddr_in6)); +#endif + } +#endif + return (error); +} + +#if !defined(__Userspace__) +struct pr_usrreqs sctp6_usrreqs = { +#if defined(__FreeBSD__) + .pru_abort = sctp6_abort, + .pru_accept = sctp_accept, + .pru_attach = sctp6_attach, + .pru_bind = sctp6_bind, + .pru_connect = sctp6_connect, + .pru_control = in6_control, + .pru_close = sctp6_close, + .pru_detach = sctp6_close, + .pru_sopoll = sopoll_generic, + .pru_flush = sctp_flush, + .pru_disconnect = sctp6_disconnect, + .pru_listen = sctp_listen, + .pru_peeraddr = sctp6_getpeeraddr, + .pru_send = sctp6_send, + .pru_shutdown = sctp_shutdown, + .pru_sockaddr = sctp6_in6getaddr, + .pru_sosend = sctp_sosend, + .pru_soreceive = sctp_soreceive +#elif defined(__APPLE__) && !defined(__Userspace__) + .pru_abort = sctp6_abort, + .pru_accept = sctp_accept, + .pru_attach = sctp6_attach, + .pru_bind = sctp6_bind, + .pru_connect = sctp6_connect, + .pru_connect2 = pru_connect2_notsupp, + .pru_control = in6_control, + .pru_detach = sctp6_detach, + .pru_disconnect = sctp6_disconnect, + .pru_listen = sctp_listen, + .pru_peeraddr = sctp6_getpeeraddr, + .pru_rcvd = NULL, + .pru_rcvoob = pru_rcvoob_notsupp, + .pru_send = sctp6_send, + .pru_sense = pru_sense_null, + .pru_shutdown = sctp_shutdown, + .pru_sockaddr = sctp6_in6getaddr, + .pru_sosend = sctp_sosend, + .pru_soreceive = sctp_soreceive, + .pru_sopoll = sopoll +#elif defined(_WIN32) && !defined(__Userspace__) + sctp6_abort, + sctp_accept, + sctp6_attach, + sctp6_bind, + sctp6_connect, + pru_connect2_notsupp, + NULL, + NULL, + sctp6_disconnect, + sctp_listen, + sctp6_getpeeraddr, + NULL, + pru_rcvoob_notsupp, + NULL, + pru_sense_null, + sctp_shutdown, + sctp_flush, + sctp6_in6getaddr, + sctp_sosend, + sctp_soreceive, + sopoll_generic, + NULL, + sctp6_close +#endif +}; + +#elif !defined(__Userspace__) +int +sctp6_usrreq(so, req, m, nam, control, p) + struct socket *so; + int req; + struct mbuf *m, *nam, *control; + struct proc *p; +{ + int error; + int family; + + family = so->so_proto->pr_domain->dom_family; + + if (req == PRU_CONTROL) { + switch (family) { + case PF_INET: + error = in_control(so, (long)m, (caddr_t)nam, + (struct ifnet *)control ); + break; +#ifdef INET6 + case PF_INET6: + error = in6_control(so, (long)m, (caddr_t)nam, + (struct ifnet *)control, p); + break; +#endif + default: + SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EAFNOSUPPORT); + error = EAFNOSUPPORT; + } + return (error); + } + switch (req) { + case PRU_ATTACH: + error = sctp6_attach(so, family, p); + break; + case PRU_DETACH: + error = sctp6_detach(so); + break; + case PRU_BIND: + if (nam == NULL) { + SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); + return (EINVAL); + } + error = sctp6_bind(so, nam, p); + break; + case PRU_LISTEN: + error = sctp_listen(so, p); + break; + case PRU_CONNECT: + if (nam == NULL) { + SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); + return (EINVAL); + } + error = sctp6_connect(so, nam, p); + break; + case PRU_DISCONNECT: + error = sctp6_disconnect(so); + break; + case PRU_ACCEPT: + if (nam == NULL) { + SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); + return (EINVAL); + } + error = sctp_accept(so, nam); + break; + case PRU_SHUTDOWN: + error = sctp_shutdown(so); + break; + + case PRU_RCVD: + /* + * For OpenBSD and NetBSD, this is real ugly. The (mbuf *) + * nam that is passed (by soreceive()) is the int flags cast + * as a (mbuf *) yuck! + */ + error = sctp_usr_recvd(so, (int)((long)nam)); + break; + + case PRU_SEND: + /* Flags are ignored */ + error = sctp6_send(so, 0, m, nam, control, p); + break; + case PRU_ABORT: + error = sctp6_abort(so); + break; + + case PRU_SENSE: + error = 0; + break; + case PRU_RCVOOB: + SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EAFNOSUPPORT); + error = EAFNOSUPPORT; + break; + case PRU_SENDOOB: + SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EAFNOSUPPORT); + error = EAFNOSUPPORT; + break; + case PRU_PEERADDR: + error = sctp6_getpeeraddr(so, nam); + break; + case PRU_SOCKADDR: + error = sctp6_in6getaddr(so, nam); + break; + case PRU_SLOWTIMO: + error = 0; + break; + default: + error = 0; + break; + } + return (error); +} +#endif +#endif |