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Diffstat (limited to '')
| -rw-r--r-- | netwerk/sctp/src/user_socket.c | 3586 |
1 files changed, 3586 insertions, 0 deletions
diff --git a/netwerk/sctp/src/user_socket.c b/netwerk/sctp/src/user_socket.c new file mode 100644 index 0000000000..ce9daed2aa --- /dev/null +++ b/netwerk/sctp/src/user_socket.c @@ -0,0 +1,3586 @@ +/*- + * Copyright (c) 1982, 1986, 1988, 1990, 1993 + * The Regents of the University of California. + * Copyright (c) 2004 The FreeBSD Foundation + * Copyright (c) 2004-2008 Robert N. M. Watson + * Copyright (c) 2009-2010 Brad Penoff + * Copyright (c) 2009-2010 Humaira Kamal + * Copyright (c) 2011-2012 Irene Ruengeler + * Copyright (c) 2011-2012 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: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. 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. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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. + * + */ + +#include <netinet/sctp_os.h> +#include <netinet/sctp_pcb.h> +#include <netinet/sctputil.h> +#include <netinet/sctp_var.h> +#include <netinet/sctp_sysctl.h> +#include <netinet/sctp_input.h> +#include <netinet/sctp_peeloff.h> +#include <netinet/sctp_callout.h> +#include <netinet/sctp_crc32.h> +#ifdef INET6 +#include <netinet6/sctp6_var.h> +#endif +#if defined(__FreeBSD__) +#include <sys/param.h> +#endif +#if defined(__linux__) +#define __FAVOR_BSD /* (on Ubuntu at least) enables UDP header field names like BSD in RFC 768 */ +#endif +#if !defined(_WIN32) +#if defined INET || defined INET6 +#include <netinet/udp.h> +#endif +#include <arpa/inet.h> +#else +#include <user_socketvar.h> +#endif +userland_mutex_t accept_mtx; +userland_cond_t accept_cond; +#ifdef _WIN32 +#include <time.h> +#include <sys/timeb.h> +#endif + +MALLOC_DEFINE(M_PCB, "sctp_pcb", "sctp pcb"); +MALLOC_DEFINE(M_SONAME, "sctp_soname", "sctp soname"); +#define MAXLEN_MBUF_CHAIN 32 + +/* Prototypes */ +extern int sctp_sosend(struct socket *so, struct sockaddr *addr, struct uio *uio, + struct mbuf *top, struct mbuf *control, int flags, + /* proc is a dummy in __Userspace__ and will not be passed to sctp_lower_sosend */ + struct proc *p); + +extern int sctp_attach(struct socket *so, int proto, uint32_t vrf_id); +extern int sctpconn_attach(struct socket *so, int proto, uint32_t vrf_id); + +static void init_sync(void) { +#if defined(_WIN32) +#if defined(INET) || defined(INET6) + WSADATA wsaData; + + if (WSAStartup(MAKEWORD(2,2), &wsaData) != 0) { + SCTP_PRINTF("WSAStartup failed\n"); + exit (-1); + } +#endif + InitializeConditionVariable(&accept_cond); + InitializeCriticalSection(&accept_mtx); +#else + pthread_mutexattr_t mutex_attr; + + pthread_mutexattr_init(&mutex_attr); +#ifdef INVARIANTS + pthread_mutexattr_settype(&mutex_attr, PTHREAD_MUTEX_ERRORCHECK); +#endif + pthread_mutex_init(&accept_mtx, &mutex_attr); + pthread_mutexattr_destroy(&mutex_attr); + pthread_cond_init(&accept_cond, NULL); +#endif +} + +void +usrsctp_init(uint16_t port, + int (*conn_output)(void *addr, void *buffer, size_t length, uint8_t tos, uint8_t set_df), + void (*debug_printf)(const char *format, ...)) +{ + init_sync(); + sctp_init(port, conn_output, debug_printf, 1); +} + + +void +usrsctp_init_nothreads(uint16_t port, + int (*conn_output)(void *addr, void *buffer, size_t length, uint8_t tos, uint8_t set_df), + void (*debug_printf)(const char *format, ...)) +{ + init_sync(); + sctp_init(port, conn_output, debug_printf, 0); +} + + +/* Taken from usr/src/sys/kern/uipc_sockbuf.c and modified for __Userspace__*/ +/* + * Socantsendmore indicates that no more data will be sent on the socket; it + * would normally be applied to a socket when the user informs the system + * that no more data is to be sent, by the protocol code (in case + * PRU_SHUTDOWN). Socantrcvmore indicates that no more data will be + * received, and will normally be applied to the socket by a protocol when it + * detects that the peer will send no more data. Data queued for reading in + * the socket may yet be read. + */ + +void socantrcvmore_locked(struct socket *so) +{ + SOCKBUF_LOCK_ASSERT(&so->so_rcv); + so->so_rcv.sb_state |= SBS_CANTRCVMORE; + sorwakeup_locked(so); +} + +void socantrcvmore(struct socket *so) +{ + SOCKBUF_LOCK(&so->so_rcv); + socantrcvmore_locked(so); +} + +void +socantsendmore_locked(struct socket *so) +{ + SOCKBUF_LOCK_ASSERT(&so->so_snd); + so->so_snd.sb_state |= SBS_CANTSENDMORE; + sowwakeup_locked(so); +} + +void +socantsendmore(struct socket *so) +{ + SOCKBUF_LOCK(&so->so_snd); + socantsendmore_locked(so); +} + + + +/* Taken from usr/src/sys/kern/uipc_sockbuf.c and called within sctp_lower_sosend. + */ +int +sbwait(struct sockbuf *sb) +{ + SOCKBUF_LOCK_ASSERT(sb); + + sb->sb_flags |= SB_WAIT; +#if defined(_WIN32) + if (SleepConditionVariableCS(&(sb->sb_cond), &(sb->sb_mtx), INFINITE)) + return (0); + else + return (-1); +#else + return (pthread_cond_wait(&(sb->sb_cond), &(sb->sb_mtx))); +#endif +} + + + + +/* Taken from /src/sys/kern/uipc_socket.c + * and modified for __Userspace__ + */ +static struct socket * +soalloc(void) +{ + struct socket *so; + + /* + * soalloc() sets of socket layer state for a socket, + * called only by socreate() and sonewconn(). + * + * sodealloc() tears down socket layer state for a socket, + * called only by sofree() and sonewconn(). + * __Userspace__ TODO : Make sure so is properly deallocated + * when tearing down the connection. + */ + + so = (struct socket *)malloc(sizeof(struct socket)); + + if (so == NULL) { + return (NULL); + } + memset(so, 0, sizeof(struct socket)); + + /* __Userspace__ Initializing the socket locks here */ + SOCKBUF_LOCK_INIT(&so->so_snd, "so_snd"); + SOCKBUF_LOCK_INIT(&so->so_rcv, "so_rcv"); + SOCKBUF_COND_INIT(&so->so_snd); + SOCKBUF_COND_INIT(&so->so_rcv); + SOCK_COND_INIT(so); /* timeo_cond */ + + /* __Userspace__ Any ref counting required here? Will we have any use for aiojobq? + What about gencnt and numopensockets?*/ + TAILQ_INIT(&so->so_aiojobq); + return (so); +} + +static void +sodealloc(struct socket *so) +{ + + KASSERT(so->so_count == 0, ("sodealloc(): so_count %d", so->so_count)); + KASSERT(so->so_pcb == NULL, ("sodealloc(): so_pcb != NULL")); + + SOCKBUF_COND_DESTROY(&so->so_snd); + SOCKBUF_COND_DESTROY(&so->so_rcv); + + SOCK_COND_DESTROY(so); + + SOCKBUF_LOCK_DESTROY(&so->so_snd); + SOCKBUF_LOCK_DESTROY(&so->so_rcv); + + free(so); +} + +/* Taken from /src/sys/kern/uipc_socket.c + * and modified for __Userspace__ + */ +void +sofree(struct socket *so) +{ + struct socket *head; + + ACCEPT_LOCK_ASSERT(); + SOCK_LOCK_ASSERT(so); + /* SS_NOFDREF unset in accept call. this condition seems irrelevant + * for __Userspace__... + */ + if (so->so_count != 0 || + (so->so_state & SS_PROTOREF) || (so->so_qstate & SQ_COMP)) { + SOCK_UNLOCK(so); + ACCEPT_UNLOCK(); + return; + } + head = so->so_head; + if (head != NULL) { + KASSERT((so->so_qstate & SQ_COMP) != 0 || + (so->so_qstate & SQ_INCOMP) != 0, + ("sofree: so_head != NULL, but neither SQ_COMP nor " + "SQ_INCOMP")); + KASSERT((so->so_qstate & SQ_COMP) == 0 || + (so->so_qstate & SQ_INCOMP) == 0, + ("sofree: so->so_qstate is SQ_COMP and also SQ_INCOMP")); + TAILQ_REMOVE(&head->so_incomp, so, so_list); + head->so_incqlen--; + so->so_qstate &= ~SQ_INCOMP; + so->so_head = NULL; + } + KASSERT((so->so_qstate & SQ_COMP) == 0 && + (so->so_qstate & SQ_INCOMP) == 0, + ("sofree: so_head == NULL, but still SQ_COMP(%d) or SQ_INCOMP(%d)", + so->so_qstate & SQ_COMP, so->so_qstate & SQ_INCOMP)); + if (so->so_options & SCTP_SO_ACCEPTCONN) { + KASSERT((TAILQ_EMPTY(&so->so_comp)), ("sofree: so_comp populated")); + KASSERT((TAILQ_EMPTY(&so->so_incomp)), ("sofree: so_comp populated")); + } + SOCK_UNLOCK(so); + ACCEPT_UNLOCK(); + sctp_close(so); /* was... sctp_detach(so); */ + /* + * From this point on, we assume that no other references to this + * socket exist anywhere else in the stack. Therefore, no locks need + * to be acquired or held. + * + * We used to do a lot of socket buffer and socket locking here, as + * well as invoke sorflush() and perform wakeups. The direct call to + * dom_dispose() and sbrelease_internal() are an inlining of what was + * necessary from sorflush(). + * + * Notice that the socket buffer and kqueue state are torn down + * before calling pru_detach. This means that protocols should not + * assume they can perform socket wakeups, etc, in their detach code. + */ + sodealloc(so); +} + + + +/* Taken from /src/sys/kern/uipc_socket.c */ +void +soabort(struct socket *so) +{ +#if defined(INET6) + struct sctp_inpcb *inp; +#endif + +#if defined(INET6) + inp = (struct sctp_inpcb *)so->so_pcb; + if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { + sctp6_abort(so); + } else { +#if defined(INET) + sctp_abort(so); +#endif + } +#elif defined(INET) + sctp_abort(so); +#endif + ACCEPT_LOCK(); + SOCK_LOCK(so); + sofree(so); +} + + +/* Taken from usr/src/sys/kern/uipc_socket.c and called within sctp_connect (sctp_usrreq.c). + * We use sctp_connect for send_one_init_real in ms1. + */ +void +soisconnecting(struct socket *so) +{ + + SOCK_LOCK(so); + so->so_state &= ~(SS_ISCONNECTED|SS_ISDISCONNECTING); + so->so_state |= SS_ISCONNECTING; + SOCK_UNLOCK(so); +} + +/* Taken from usr/src/sys/kern/uipc_socket.c and called within sctp_disconnect (sctp_usrreq.c). + * TODO Do we use sctp_disconnect? + */ +void +soisdisconnecting(struct socket *so) +{ + + /* + * Note: This code assumes that SOCK_LOCK(so) and + * SOCKBUF_LOCK(&so->so_rcv) are the same. + */ + SOCKBUF_LOCK(&so->so_rcv); + so->so_state &= ~SS_ISCONNECTING; + so->so_state |= SS_ISDISCONNECTING; + so->so_rcv.sb_state |= SBS_CANTRCVMORE; + sorwakeup_locked(so); + SOCKBUF_LOCK(&so->so_snd); + so->so_snd.sb_state |= SBS_CANTSENDMORE; + sowwakeup_locked(so); + wakeup("dummy",so); + /* requires 2 args but this was in orig */ + /* wakeup(&so->so_timeo); */ +} + + +/* Taken from sys/kern/kern_synch.c and + modified for __Userspace__ +*/ + +/* + * Make all threads sleeping on the specified identifier runnable. + * Associating wakeup with so_timeo identifier and timeo_cond + * condition variable. TODO. If we use iterator thread then we need to + * modify wakeup so it can distinguish between iterator identifier and + * timeo identifier. + */ +void +wakeup(void *ident, struct socket *so) +{ + SOCK_LOCK(so); +#if defined(_WIN32) + WakeAllConditionVariable(&(so)->timeo_cond); +#else + pthread_cond_broadcast(&(so)->timeo_cond); +#endif + SOCK_UNLOCK(so); +} + + +/* + * Make a thread sleeping on the specified identifier runnable. + * May wake more than one thread if a target thread is currently + * swapped out. + */ +void +wakeup_one(void *ident) +{ + /* __Userspace__ Check: We are using accept_cond for wakeup_one. + It seems that wakeup_one is only called within + soisconnected() and sonewconn() with ident &head->so_timeo + head is so->so_head, which is back pointer to listen socket + This seems to indicate that the use of accept_cond is correct + since socket where accepts occur is so_head in all + subsidiary sockets. + */ + ACCEPT_LOCK(); +#if defined(_WIN32) + WakeAllConditionVariable(&accept_cond); +#else + pthread_cond_broadcast(&accept_cond); +#endif + ACCEPT_UNLOCK(); +} + + +/* Called within sctp_process_cookie_[existing/new] */ +void +soisconnected(struct socket *so) +{ + struct socket *head; + + ACCEPT_LOCK(); + SOCK_LOCK(so); + so->so_state &= ~(SS_ISCONNECTING|SS_ISDISCONNECTING|SS_ISCONFIRMING); + so->so_state |= SS_ISCONNECTED; + head = so->so_head; + if (head != NULL && (so->so_qstate & SQ_INCOMP)) { + SOCK_UNLOCK(so); + TAILQ_REMOVE(&head->so_incomp, so, so_list); + head->so_incqlen--; + so->so_qstate &= ~SQ_INCOMP; + TAILQ_INSERT_TAIL(&head->so_comp, so, so_list); + head->so_qlen++; + so->so_qstate |= SQ_COMP; + ACCEPT_UNLOCK(); + sorwakeup(head); + wakeup_one(&head->so_timeo); + return; + } + SOCK_UNLOCK(so); + ACCEPT_UNLOCK(); + wakeup(&so->so_timeo, so); + sorwakeup(so); + sowwakeup(so); + +} + +/* called within sctp_handle_cookie_echo */ + +struct socket * +sonewconn(struct socket *head, int connstatus) +{ + struct socket *so; + int over; + + ACCEPT_LOCK(); + over = (head->so_qlen > 3 * head->so_qlimit / 2); + ACCEPT_UNLOCK(); +#ifdef REGRESSION + if (regression_sonewconn_earlytest && over) +#else + if (over) +#endif + return (NULL); + so = soalloc(); + if (so == NULL) + return (NULL); + so->so_head = head; + so->so_type = head->so_type; + so->so_options = head->so_options &~ SCTP_SO_ACCEPTCONN; + so->so_linger = head->so_linger; + so->so_state = head->so_state | SS_NOFDREF; + so->so_dom = head->so_dom; +#ifdef MAC + SOCK_LOCK(head); + mac_create_socket_from_socket(head, so); + SOCK_UNLOCK(head); +#endif + if (soreserve(so, head->so_snd.sb_hiwat, head->so_rcv.sb_hiwat)) { + sodealloc(so); + return (NULL); + } + switch (head->so_dom) { +#ifdef INET + case AF_INET: + if (sctp_attach(so, IPPROTO_SCTP, SCTP_DEFAULT_VRFID)) { + sodealloc(so); + return (NULL); + } + break; +#endif +#ifdef INET6 + case AF_INET6: + if (sctp6_attach(so, IPPROTO_SCTP, SCTP_DEFAULT_VRFID)) { + sodealloc(so); + return (NULL); + } + break; +#endif + case AF_CONN: + if (sctpconn_attach(so, IPPROTO_SCTP, SCTP_DEFAULT_VRFID)) { + sodealloc(so); + return (NULL); + } + break; + default: + sodealloc(so); + return (NULL); + break; + } + so->so_rcv.sb_lowat = head->so_rcv.sb_lowat; + so->so_snd.sb_lowat = head->so_snd.sb_lowat; + so->so_rcv.sb_timeo = head->so_rcv.sb_timeo; + so->so_snd.sb_timeo = head->so_snd.sb_timeo; + so->so_rcv.sb_flags |= head->so_rcv.sb_flags & SB_AUTOSIZE; + so->so_snd.sb_flags |= head->so_snd.sb_flags & SB_AUTOSIZE; + so->so_state |= connstatus; + ACCEPT_LOCK(); + if (connstatus) { + TAILQ_INSERT_TAIL(&head->so_comp, so, so_list); + so->so_qstate |= SQ_COMP; + head->so_qlen++; + } else { + /* + * Keep removing sockets from the head until there's room for + * us to insert on the tail. In pre-locking revisions, this + * was a simple if (), but as we could be racing with other + * threads and soabort() requires dropping locks, we must + * loop waiting for the condition to be true. + */ + while (head->so_incqlen > head->so_qlimit) { + struct socket *sp; + sp = TAILQ_FIRST(&head->so_incomp); + TAILQ_REMOVE(&head->so_incomp, sp, so_list); + head->so_incqlen--; + sp->so_qstate &= ~SQ_INCOMP; + sp->so_head = NULL; + ACCEPT_UNLOCK(); + soabort(sp); + ACCEPT_LOCK(); + } + TAILQ_INSERT_TAIL(&head->so_incomp, so, so_list); + so->so_qstate |= SQ_INCOMP; + head->so_incqlen++; + } + ACCEPT_UNLOCK(); + if (connstatus) { + sorwakeup(head); + wakeup_one(&head->so_timeo); + } + return (so); + +} + + /* + Source: /src/sys/gnu/fs/xfs/FreeBSD/xfs_ioctl.c + */ +static __inline__ int +copy_to_user(void *dst, void *src, size_t len) { + memcpy(dst, src, len); + return 0; +} + +static __inline__ int +copy_from_user(void *dst, void *src, size_t len) { + memcpy(dst, src, len); + return 0; +} + +/* + References: + src/sys/dev/lmc/if_lmc.h: + src/sys/powerpc/powerpc/copyinout.c + src/sys/sys/systm.h +*/ +# define copyin(u, k, len) copy_from_user(k, u, len) + +/* References: + src/sys/powerpc/powerpc/copyinout.c + src/sys/sys/systm.h +*/ +# define copyout(k, u, len) copy_to_user(u, k, len) + + +/* copyiniov definition copied/modified from src/sys/kern/kern_subr.c */ +int +copyiniov(struct iovec *iovp, u_int iovcnt, struct iovec **iov, int error) +{ + u_int iovlen; + + *iov = NULL; + if (iovcnt > UIO_MAXIOV) + return (error); + iovlen = iovcnt * sizeof (struct iovec); + *iov = malloc(iovlen); /*, M_IOV, M_WAITOK); */ + error = copyin(iovp, *iov, iovlen); + if (error) { + free(*iov); /*, M_IOV); */ + *iov = NULL; + } + return (error); +} + +/* (__Userspace__) version of uiomove */ +int +uiomove(void *cp, int n, struct uio *uio) +{ + struct iovec *iov; + size_t cnt; + int error = 0; + + if ((uio->uio_rw != UIO_READ) && + (uio->uio_rw != UIO_WRITE)) { + return (EINVAL); + } + + while (n > 0 && uio->uio_resid) { + iov = uio->uio_iov; + cnt = iov->iov_len; + if (cnt == 0) { + uio->uio_iov++; + uio->uio_iovcnt--; + continue; + } + if (cnt > (size_t)n) + cnt = n; + + switch (uio->uio_segflg) { + + case UIO_USERSPACE: + if (uio->uio_rw == UIO_READ) + error = copyout(cp, iov->iov_base, cnt); + else + error = copyin(iov->iov_base, cp, cnt); + if (error) + goto out; + break; + + case UIO_SYSSPACE: + if (uio->uio_rw == UIO_READ) + memcpy(iov->iov_base, cp, cnt); + else + memcpy(cp, iov->iov_base, cnt); + break; + } + iov->iov_base = (char *)iov->iov_base + cnt; + iov->iov_len -= cnt; + uio->uio_resid -= cnt; + uio->uio_offset += (off_t)cnt; + cp = (char *)cp + cnt; + n -= (int)cnt; + } +out: + return (error); +} + + +/* Source: src/sys/kern/uipc_syscalls.c */ +int +getsockaddr(struct sockaddr **namp, caddr_t uaddr, size_t len) +{ + struct sockaddr *sa; + int error; + + if (len > SOCK_MAXADDRLEN) + return (ENAMETOOLONG); + if (len < offsetof(struct sockaddr, sa_data)) + return (EINVAL); + MALLOC(sa, struct sockaddr *, len, M_SONAME, M_WAITOK); + error = copyin(uaddr, sa, len); + if (error) { + FREE(sa, M_SONAME); + } else { +#ifdef HAVE_SA_LEN + sa->sa_len = len; +#endif + *namp = sa; + } + return (error); +} + +int +usrsctp_getsockopt(struct socket *so, int level, int option_name, + void *option_value, socklen_t *option_len); + +sctp_assoc_t +usrsctp_getassocid(struct socket *sock, struct sockaddr *sa) +{ + struct sctp_paddrinfo sp; + socklen_t siz; +#ifndef HAVE_SA_LEN + size_t sa_len; +#endif + + /* First get the assoc id */ + siz = sizeof(sp); + memset(&sp, 0, sizeof(sp)); +#ifdef HAVE_SA_LEN + memcpy((caddr_t)&sp.spinfo_address, sa, sa->sa_len); +#else + switch (sa->sa_family) { +#ifdef INET + case AF_INET: + sa_len = sizeof(struct sockaddr_in); + break; +#endif +#ifdef INET6 + case AF_INET6: + sa_len = sizeof(struct sockaddr_in6); + break; +#endif + case AF_CONN: + sa_len = sizeof(struct sockaddr_conn); + break; + default: + sa_len = 0; + break; + } + memcpy((caddr_t)&sp.spinfo_address, sa, sa_len); +#endif + if (usrsctp_getsockopt(sock, IPPROTO_SCTP, SCTP_GET_PEER_ADDR_INFO, &sp, &siz) != 0) { + /* We depend on the fact that 0 can never be returned */ + return ((sctp_assoc_t) 0); + } + return (sp.spinfo_assoc_id); +} + + +/* Taken from /src/lib/libc/net/sctp_sys_calls.c + * and modified for __Userspace__ + * calling sctp_generic_sendmsg from this function + */ +ssize_t +userspace_sctp_sendmsg(struct socket *so, + const void *data, + size_t len, + struct sockaddr *to, + socklen_t tolen, + uint32_t ppid, + uint32_t flags, + uint16_t stream_no, + uint32_t timetolive, + uint32_t context) +{ + struct sctp_sndrcvinfo sndrcvinfo, *sinfo = &sndrcvinfo; + struct uio auio; + struct iovec iov[1]; + + memset(sinfo, 0, sizeof(struct sctp_sndrcvinfo)); + sinfo->sinfo_ppid = ppid; + sinfo->sinfo_flags = flags; + sinfo->sinfo_stream = stream_no; + sinfo->sinfo_timetolive = timetolive; + sinfo->sinfo_context = context; + sinfo->sinfo_assoc_id = 0; + + + /* Perform error checks on destination (to) */ + if (tolen > SOCK_MAXADDRLEN) { + errno = ENAMETOOLONG; + return (-1); + } + if ((tolen > 0) && + ((to == NULL) || (tolen < (socklen_t)sizeof(struct sockaddr)))) { + errno = EINVAL; + return (-1); + } + if (data == NULL) { + errno = EFAULT; + return (-1); + } + /* Adding the following as part of defensive programming, in case the application + does not do it when preparing the destination address.*/ +#ifdef HAVE_SA_LEN + if (to != NULL) { + to->sa_len = tolen; + } +#endif + + iov[0].iov_base = (caddr_t)data; + iov[0].iov_len = len; + + auio.uio_iov = iov; + auio.uio_iovcnt = 1; + auio.uio_segflg = UIO_USERSPACE; + auio.uio_rw = UIO_WRITE; + auio.uio_offset = 0; /* XXX */ + auio.uio_resid = len; + errno = sctp_lower_sosend(so, to, &auio, NULL, NULL, 0, sinfo); + if (errno == 0) { + return (len - auio.uio_resid); + } else { + return (-1); + } +} + + +ssize_t +usrsctp_sendv(struct socket *so, + const void *data, + size_t len, + struct sockaddr *to, + int addrcnt, + void *info, + socklen_t infolen, + unsigned int infotype, + int flags) +{ + struct sctp_sndrcvinfo sinfo; + struct uio auio; + struct iovec iov[1]; + int use_sinfo; + sctp_assoc_t *assoc_id; + + if (so == NULL) { + errno = EBADF; + return (-1); + } + if (data == NULL) { + errno = EFAULT; + return (-1); + } + memset(&sinfo, 0, sizeof(struct sctp_sndrcvinfo)); + assoc_id = NULL; + use_sinfo = 0; + switch (infotype) { + case SCTP_SENDV_NOINFO: + if ((infolen != 0) || (info != NULL)) { + errno = EINVAL; + return (-1); + } + break; + case SCTP_SENDV_SNDINFO: + if ((info == NULL) || (infolen != sizeof(struct sctp_sndinfo))) { + errno = EINVAL; + return (-1); + } + sinfo.sinfo_stream = ((struct sctp_sndinfo *)info)->snd_sid; + sinfo.sinfo_flags = ((struct sctp_sndinfo *)info)->snd_flags; + sinfo.sinfo_ppid = ((struct sctp_sndinfo *)info)->snd_ppid; + sinfo.sinfo_context = ((struct sctp_sndinfo *)info)->snd_context; + sinfo.sinfo_assoc_id = ((struct sctp_sndinfo *)info)->snd_assoc_id; + assoc_id = &(((struct sctp_sndinfo *)info)->snd_assoc_id); + use_sinfo = 1; + break; + case SCTP_SENDV_PRINFO: + if ((info == NULL) || (infolen != sizeof(struct sctp_prinfo))) { + errno = EINVAL; + return (-1); + } + sinfo.sinfo_stream = 0; + sinfo.sinfo_flags = PR_SCTP_POLICY(((struct sctp_prinfo *)info)->pr_policy); + sinfo.sinfo_timetolive = ((struct sctp_prinfo *)info)->pr_value; + use_sinfo = 1; + break; + case SCTP_SENDV_AUTHINFO: + errno = EINVAL; + return (-1); + case SCTP_SENDV_SPA: + if ((info == NULL) || (infolen != sizeof(struct sctp_sendv_spa))) { + errno = EINVAL; + return (-1); + } + if (((struct sctp_sendv_spa *)info)->sendv_flags & SCTP_SEND_SNDINFO_VALID) { + sinfo.sinfo_stream = ((struct sctp_sendv_spa *)info)->sendv_sndinfo.snd_sid; + sinfo.sinfo_flags = ((struct sctp_sendv_spa *)info)->sendv_sndinfo.snd_flags; + sinfo.sinfo_ppid = ((struct sctp_sendv_spa *)info)->sendv_sndinfo.snd_ppid; + sinfo.sinfo_context = ((struct sctp_sendv_spa *)info)->sendv_sndinfo.snd_context; + sinfo.sinfo_assoc_id = ((struct sctp_sendv_spa *)info)->sendv_sndinfo.snd_assoc_id; + assoc_id = &(((struct sctp_sendv_spa *)info)->sendv_sndinfo.snd_assoc_id); + } else { + sinfo.sinfo_flags = 0; + sinfo.sinfo_stream = 0; + } + if (((struct sctp_sendv_spa *)info)->sendv_flags & SCTP_SEND_PRINFO_VALID) { + sinfo.sinfo_flags |= PR_SCTP_POLICY(((struct sctp_sendv_spa *)info)->sendv_prinfo.pr_policy); + sinfo.sinfo_timetolive = ((struct sctp_sendv_spa *)info)->sendv_prinfo.pr_value; + } + if (((struct sctp_sendv_spa *)info)->sendv_flags & SCTP_SEND_AUTHINFO_VALID) { + errno = EINVAL; + return (-1); + } + use_sinfo = 1; + break; + default: + errno = EINVAL; + return (-1); + } + + /* Perform error checks on destination (to) */ + if (addrcnt > 1) { + errno = EINVAL; + return (-1); + } + + iov[0].iov_base = (caddr_t)data; + iov[0].iov_len = len; + + auio.uio_iov = iov; + auio.uio_iovcnt = 1; + auio.uio_segflg = UIO_USERSPACE; + auio.uio_rw = UIO_WRITE; + auio.uio_offset = 0; /* XXX */ + auio.uio_resid = len; + errno = sctp_lower_sosend(so, to, &auio, NULL, NULL, flags, use_sinfo ? &sinfo : NULL); + if (errno == 0) { + if ((to != NULL) && (assoc_id != NULL)) { + *assoc_id = usrsctp_getassocid(so, to); + } + return (len - auio.uio_resid); + } else { + return (-1); + } +} + + +ssize_t +userspace_sctp_sendmbuf(struct socket *so, + struct mbuf* mbufdata, + size_t len, + struct sockaddr *to, + socklen_t tolen, + uint32_t ppid, + uint32_t flags, + uint16_t stream_no, + uint32_t timetolive, + uint32_t context) +{ + + struct sctp_sndrcvinfo sndrcvinfo, *sinfo = &sndrcvinfo; + /* struct uio auio; + struct iovec iov[1]; */ + int error = 0; + int uflags = 0; + ssize_t retval; + + sinfo->sinfo_ppid = ppid; + sinfo->sinfo_flags = flags; + sinfo->sinfo_stream = stream_no; + sinfo->sinfo_timetolive = timetolive; + sinfo->sinfo_context = context; + sinfo->sinfo_assoc_id = 0; + + /* Perform error checks on destination (to) */ + if (tolen > SOCK_MAXADDRLEN){ + error = (ENAMETOOLONG); + goto sendmsg_return; + } + if (tolen < (socklen_t)offsetof(struct sockaddr, sa_data)){ + error = (EINVAL); + goto sendmsg_return; + } + /* Adding the following as part of defensive programming, in case the application + does not do it when preparing the destination address.*/ +#ifdef HAVE_SA_LEN + to->sa_len = tolen; +#endif + + error = sctp_lower_sosend(so, to, NULL/*uio*/, + (struct mbuf *)mbufdata, (struct mbuf *)NULL, + uflags, sinfo); +sendmsg_return: + /* TODO: Needs a condition for non-blocking when error is EWOULDBLOCK */ + if (0 == error) + retval = len; + else if (error == EWOULDBLOCK) { + errno = EWOULDBLOCK; + retval = -1; + } else { + SCTP_PRINTF("%s: error = %d\n", __func__, error); + errno = error; + retval = -1; + } + return (retval); +} + + +/* taken from usr.lib/sctp_sys_calls.c and needed here */ +#define SCTP_SMALL_IOVEC_SIZE 2 + +/* Taken from /src/lib/libc/net/sctp_sys_calls.c + * and modified for __Userspace__ + * calling sctp_generic_recvmsg from this function + */ +ssize_t +userspace_sctp_recvmsg(struct socket *so, + void *dbuf, + size_t len, + struct sockaddr *from, + socklen_t *fromlenp, + struct sctp_sndrcvinfo *sinfo, + int *msg_flags) +{ + struct uio auio; + struct iovec iov[SCTP_SMALL_IOVEC_SIZE]; + struct iovec *tiov; + int iovlen = 1; + int error = 0; + ssize_t ulen; + int i; + socklen_t fromlen; + + iov[0].iov_base = dbuf; + iov[0].iov_len = len; + + auio.uio_iov = iov; + auio.uio_iovcnt = iovlen; + auio.uio_segflg = UIO_USERSPACE; + auio.uio_rw = UIO_READ; + auio.uio_offset = 0; /* XXX */ + auio.uio_resid = 0; + tiov = iov; + for (i = 0; i <iovlen; i++, tiov++) { + if ((auio.uio_resid += tiov->iov_len) < 0) { + error = EINVAL; + SCTP_PRINTF("%s: error = %d\n", __func__, error); + return (-1); + } + } + ulen = auio.uio_resid; + if (fromlenp != NULL) { + fromlen = *fromlenp; + } else { + fromlen = 0; + } + error = sctp_sorecvmsg(so, &auio, (struct mbuf **)NULL, + from, fromlen, msg_flags, + (struct sctp_sndrcvinfo *)sinfo, 1); + + if (error) { + if ((auio.uio_resid != ulen) && + (error == EINTR || +#if !defined(__NetBSD__) + error == ERESTART || +#endif + error == EWOULDBLOCK)) { + error = 0; + } + } + if ((fromlenp != NULL) && (fromlen > 0) && (from != NULL)) { + switch (from->sa_family) { +#if defined(INET) + case AF_INET: + *fromlenp = sizeof(struct sockaddr_in); + break; +#endif +#if defined(INET6) + case AF_INET6: + *fromlenp = sizeof(struct sockaddr_in6); + break; +#endif + case AF_CONN: + *fromlenp = sizeof(struct sockaddr_conn); + break; + default: + *fromlenp = 0; + break; + } + if (*fromlenp > fromlen) { + *fromlenp = fromlen; + } + } + if (error == 0) { + /* ready return value */ + return (ulen - auio.uio_resid); + } else { + SCTP_PRINTF("%s: error = %d\n", __func__, error); + return (-1); + } +} + +ssize_t +usrsctp_recvv(struct socket *so, + void *dbuf, + size_t len, + struct sockaddr *from, + socklen_t *fromlenp, + void *info, + socklen_t *infolen, + unsigned int *infotype, + int *msg_flags) +{ + struct uio auio; + struct iovec iov[SCTP_SMALL_IOVEC_SIZE]; + struct iovec *tiov; + int iovlen = 1; + ssize_t ulen; + int i; + socklen_t fromlen; + struct sctp_rcvinfo *rcv; + struct sctp_recvv_rn *rn; + struct sctp_extrcvinfo seinfo; + + if (so == NULL) { + errno = EBADF; + return (-1); + } + iov[0].iov_base = dbuf; + iov[0].iov_len = len; + + auio.uio_iov = iov; + auio.uio_iovcnt = iovlen; + auio.uio_segflg = UIO_USERSPACE; + auio.uio_rw = UIO_READ; + auio.uio_offset = 0; /* XXX */ + auio.uio_resid = 0; + tiov = iov; + for (i = 0; i <iovlen; i++, tiov++) { + if ((auio.uio_resid += tiov->iov_len) < 0) { + errno = EINVAL; + return (-1); + } + } + ulen = auio.uio_resid; + if (fromlenp != NULL) { + fromlen = *fromlenp; + } else { + fromlen = 0; + } + errno = sctp_sorecvmsg(so, &auio, (struct mbuf **)NULL, + from, fromlen, msg_flags, + (struct sctp_sndrcvinfo *)&seinfo, 1); + if (errno) { + if ((auio.uio_resid != ulen) && + (errno == EINTR || +#if !defined(__NetBSD__) + errno == ERESTART || +#endif + errno == EWOULDBLOCK)) { + errno = 0; + } + } + if (errno != 0) { + goto out; + } + if ((*msg_flags & MSG_NOTIFICATION) == 0) { + struct sctp_inpcb *inp; + + inp = (struct sctp_inpcb *)so->so_pcb; + if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_RECVNXTINFO) && + sctp_is_feature_on(inp, SCTP_PCB_FLAGS_RECVRCVINFO) && + *infolen >= (socklen_t)sizeof(struct sctp_recvv_rn) && + seinfo.sreinfo_next_flags & SCTP_NEXT_MSG_AVAIL) { + rn = (struct sctp_recvv_rn *)info; + rn->recvv_rcvinfo.rcv_sid = seinfo.sinfo_stream; + rn->recvv_rcvinfo.rcv_ssn = seinfo.sinfo_ssn; + rn->recvv_rcvinfo.rcv_flags = seinfo.sinfo_flags; + rn->recvv_rcvinfo.rcv_ppid = seinfo.sinfo_ppid; + rn->recvv_rcvinfo.rcv_context = seinfo.sinfo_context; + rn->recvv_rcvinfo.rcv_tsn = seinfo.sinfo_tsn; + rn->recvv_rcvinfo.rcv_cumtsn = seinfo.sinfo_cumtsn; + rn->recvv_rcvinfo.rcv_assoc_id = seinfo.sinfo_assoc_id; + rn->recvv_nxtinfo.nxt_sid = seinfo.sreinfo_next_stream; + rn->recvv_nxtinfo.nxt_flags = 0; + if (seinfo.sreinfo_next_flags & SCTP_NEXT_MSG_IS_UNORDERED) { + rn->recvv_nxtinfo.nxt_flags |= SCTP_UNORDERED; + } + if (seinfo.sreinfo_next_flags & SCTP_NEXT_MSG_IS_NOTIFICATION) { + rn->recvv_nxtinfo.nxt_flags |= SCTP_NOTIFICATION; + } + if (seinfo.sreinfo_next_flags & SCTP_NEXT_MSG_ISCOMPLETE) { + rn->recvv_nxtinfo.nxt_flags |= SCTP_COMPLETE; + } + rn->recvv_nxtinfo.nxt_ppid = seinfo.sreinfo_next_ppid; + rn->recvv_nxtinfo.nxt_length = seinfo.sreinfo_next_length; + rn->recvv_nxtinfo.nxt_assoc_id = seinfo.sreinfo_next_aid; + *infolen = (socklen_t)sizeof(struct sctp_recvv_rn); + *infotype = SCTP_RECVV_RN; + } else if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_RECVRCVINFO) && + *infolen >= (socklen_t)sizeof(struct sctp_rcvinfo)) { + rcv = (struct sctp_rcvinfo *)info; + rcv->rcv_sid = seinfo.sinfo_stream; + rcv->rcv_ssn = seinfo.sinfo_ssn; + rcv->rcv_flags = seinfo.sinfo_flags; + rcv->rcv_ppid = seinfo.sinfo_ppid; + rcv->rcv_context = seinfo.sinfo_context; + rcv->rcv_tsn = seinfo.sinfo_tsn; + rcv->rcv_cumtsn = seinfo.sinfo_cumtsn; + rcv->rcv_assoc_id = seinfo.sinfo_assoc_id; + *infolen = (socklen_t)sizeof(struct sctp_rcvinfo); + *infotype = SCTP_RECVV_RCVINFO; + } else { + *infotype = SCTP_RECVV_NOINFO; + *infolen = 0; + } + } + if ((fromlenp != NULL) && + (fromlen > 0) && + (from != NULL) && + (ulen > auio.uio_resid)) { + switch (from->sa_family) { +#if defined(INET) + case AF_INET: + *fromlenp = sizeof(struct sockaddr_in); + break; +#endif +#if defined(INET6) + case AF_INET6: + *fromlenp = sizeof(struct sockaddr_in6); + break; +#endif + case AF_CONN: + *fromlenp = sizeof(struct sockaddr_conn); + break; + default: + *fromlenp = 0; + break; + } + if (*fromlenp > fromlen) { + *fromlenp = fromlen; + } + } +out: + if (errno == 0) { + /* ready return value */ + return (ulen - auio.uio_resid); + } else { + return (-1); + } +} + + + + +/* Taken from /src/sys/kern/uipc_socket.c + * and modified for __Userspace__ + * socreate returns a socket. The socket should be + * closed with soclose(). + */ +int +socreate(int dom, struct socket **aso, int type, int proto) +{ + struct socket *so; + int error; + + if ((dom != AF_CONN) && (dom != AF_INET) && (dom != AF_INET6)) { + return (EINVAL); + } + if ((type != SOCK_STREAM) && (type != SOCK_SEQPACKET)) { + return (EINVAL); + } + if (proto != IPPROTO_SCTP) { + return (EINVAL); + } + + so = soalloc(); + if (so == NULL) { + return (ENOBUFS); + } + + /* + * so_incomp represents a queue of connections that + * must be completed at protocol level before being + * returned. so_comp field heads a list of sockets + * that are ready to be returned to the listening process + *__Userspace__ These queues are being used at a number of places like accept etc. + */ + TAILQ_INIT(&so->so_incomp); + TAILQ_INIT(&so->so_comp); + so->so_type = type; + so->so_count = 1; + so->so_dom = dom; + /* + * Auto-sizing of socket buffers is managed by the protocols and + * the appropriate flags must be set in the pru_attach function. + * For __Userspace__ The pru_attach function in this case is sctp_attach. + */ + switch (dom) { +#if defined(INET) + case AF_INET: + error = sctp_attach(so, proto, SCTP_DEFAULT_VRFID); + break; +#endif +#if defined(INET6) + case AF_INET6: + error = sctp6_attach(so, proto, SCTP_DEFAULT_VRFID); + break; +#endif + case AF_CONN: + error = sctpconn_attach(so, proto, SCTP_DEFAULT_VRFID); + break; + default: + error = EAFNOSUPPORT; + break; + } + if (error) { + KASSERT(so->so_count == 1, ("socreate: so_count %d", so->so_count)); + so->so_count = 0; + sodealloc(so); + return (error); + } + *aso = so; + return (0); +} + + +/* Taken from /src/sys/kern/uipc_syscalls.c + * and modified for __Userspace__ + * Removing struct thread td. + */ +struct socket * +userspace_socket(int domain, int type, int protocol) +{ + struct socket *so = NULL; + + errno = socreate(domain, &so, type, protocol); + if (errno) { + return (NULL); + } + /* + * The original socket call returns the file descriptor fd. + * td->td_retval[0] = fd. + * We are returning struct socket *so. + */ + return (so); +} + +struct socket * +usrsctp_socket(int domain, int type, int protocol, + int (*receive_cb)(struct socket *sock, union sctp_sockstore addr, void *data, + size_t datalen, struct sctp_rcvinfo, int flags, void *ulp_info), + int (*send_cb)(struct socket *sock, uint32_t sb_free, void *ulp_info), + uint32_t sb_threshold, + void *ulp_info) +{ + struct socket *so = NULL; + + if ((protocol == IPPROTO_SCTP) && (SCTP_BASE_VAR(sctp_pcb_initialized) == 0)) { + errno = EPROTONOSUPPORT; + return (NULL); + } + if ((receive_cb == NULL) && + ((send_cb != NULL) || (sb_threshold != 0) || (ulp_info != NULL))) { + errno = EINVAL; + return (NULL); + } + if ((domain == AF_CONN) && (SCTP_BASE_VAR(conn_output) == NULL)) { + errno = EAFNOSUPPORT; + return (NULL); + } + errno = socreate(domain, &so, type, protocol); + if (errno) { + return (NULL); + } + /* + * The original socket call returns the file descriptor fd. + * td->td_retval[0] = fd. + * We are returning struct socket *so. + */ + register_recv_cb(so, receive_cb); + register_send_cb(so, sb_threshold, send_cb); + register_ulp_info(so, ulp_info); + return (so); +} + + +u_long sb_max = SB_MAX; +u_long sb_max_adj = + SB_MAX * MCLBYTES / (MSIZE + MCLBYTES); /* adjusted sb_max */ + +static u_long sb_efficiency = 8; /* parameter for sbreserve() */ + +/* + * Allot mbufs to a sockbuf. Attempt to scale mbmax so that mbcnt doesn't + * become limiting if buffering efficiency is near the normal case. + */ +int +sbreserve_locked(struct sockbuf *sb, u_long cc, struct socket *so) +{ + SOCKBUF_LOCK_ASSERT(sb); + sb->sb_mbmax = (u_int)min(cc * sb_efficiency, sb_max); + sb->sb_hiwat = (u_int)cc; + if (sb->sb_lowat > (int)sb->sb_hiwat) + sb->sb_lowat = (int)sb->sb_hiwat; + return (1); +} + +static int +sbreserve(struct sockbuf *sb, u_long cc, struct socket *so) +{ + int error; + + SOCKBUF_LOCK(sb); + error = sbreserve_locked(sb, cc, so); + SOCKBUF_UNLOCK(sb); + return (error); +} + +int +soreserve(struct socket *so, u_long sndcc, u_long rcvcc) +{ + SOCKBUF_LOCK(&so->so_snd); + SOCKBUF_LOCK(&so->so_rcv); + so->so_snd.sb_hiwat = (uint32_t)sndcc; + so->so_rcv.sb_hiwat = (uint32_t)rcvcc; + + if (sbreserve_locked(&so->so_snd, sndcc, so) == 0) { + goto bad; + } + if (sbreserve_locked(&so->so_rcv, rcvcc, so) == 0) { + goto bad; + } + if (so->so_rcv.sb_lowat == 0) + so->so_rcv.sb_lowat = 1; + if (so->so_snd.sb_lowat == 0) + so->so_snd.sb_lowat = MCLBYTES; + if (so->so_snd.sb_lowat > (int)so->so_snd.sb_hiwat) + so->so_snd.sb_lowat = (int)so->so_snd.sb_hiwat; + SOCKBUF_UNLOCK(&so->so_rcv); + SOCKBUF_UNLOCK(&so->so_snd); + return (0); + + bad: + SOCKBUF_UNLOCK(&so->so_rcv); + SOCKBUF_UNLOCK(&so->so_snd); + return (ENOBUFS); +} + + +/* Taken from /src/sys/kern/uipc_sockbuf.c + * and modified for __Userspace__ + */ + +void +sowakeup(struct socket *so, struct sockbuf *sb) +{ + + SOCKBUF_LOCK_ASSERT(sb); + + sb->sb_flags &= ~SB_SEL; + if (sb->sb_flags & SB_WAIT) { + sb->sb_flags &= ~SB_WAIT; +#if defined(_WIN32) + WakeAllConditionVariable(&(sb)->sb_cond); +#else + pthread_cond_broadcast(&(sb)->sb_cond); +#endif + } + SOCKBUF_UNLOCK(sb); +} + + +/* Taken from /src/sys/kern/uipc_socket.c + * and modified for __Userspace__ + */ + +int +sobind(struct socket *so, struct sockaddr *nam) +{ + switch (nam->sa_family) { +#if defined(INET) + case AF_INET: + return (sctp_bind(so, nam)); +#endif +#if defined(INET6) + case AF_INET6: + return (sctp6_bind(so, nam, NULL)); +#endif + case AF_CONN: + return (sctpconn_bind(so, nam)); + default: + return EAFNOSUPPORT; + } +} + +/* Taken from /src/sys/kern/uipc_syscalls.c + * and modified for __Userspace__ + */ + +int +usrsctp_bind(struct socket *so, struct sockaddr *name, int namelen) +{ + struct sockaddr *sa; + + if (so == NULL) { + errno = EBADF; + return (-1); + } + if ((errno = getsockaddr(&sa, (caddr_t)name, namelen)) != 0) + return (-1); + + errno = sobind(so, sa); + FREE(sa, M_SONAME); + if (errno) { + return (-1); + } else { + return (0); + } +} + +int +userspace_bind(struct socket *so, struct sockaddr *name, int namelen) +{ + return (usrsctp_bind(so, name, namelen)); +} + +/* Taken from /src/sys/kern/uipc_socket.c + * and modified for __Userspace__ + */ + +int +solisten(struct socket *so, int backlog) +{ + if (so == NULL) { + return (EBADF); + } else { + return (sctp_listen(so, backlog, NULL)); + } +} + + +int +solisten_proto_check(struct socket *so) +{ + + SOCK_LOCK_ASSERT(so); + + if (so->so_state & (SS_ISCONNECTED | SS_ISCONNECTING | + SS_ISDISCONNECTING)) + return (EINVAL); + return (0); +} + +static int somaxconn = SOMAXCONN; + +void +solisten_proto(struct socket *so, int backlog) +{ + + SOCK_LOCK_ASSERT(so); + + if (backlog < 0 || backlog > somaxconn) + backlog = somaxconn; + so->so_qlimit = backlog; + so->so_options |= SCTP_SO_ACCEPTCONN; +} + + + + +/* Taken from /src/sys/kern/uipc_syscalls.c + * and modified for __Userspace__ + */ + +int +usrsctp_listen(struct socket *so, int backlog) +{ + errno = solisten(so, backlog); + if (errno) { + return (-1); + } else { + return (0); + } +} + +int +userspace_listen(struct socket *so, int backlog) +{ + return (usrsctp_listen(so, backlog)); +} + +/* Taken from /src/sys/kern/uipc_socket.c + * and modified for __Userspace__ + */ + +int +soaccept(struct socket *so, struct sockaddr **nam) +{ + int error; + + SOCK_LOCK(so); + KASSERT((so->so_state & SS_NOFDREF) != 0, ("soaccept: !NOFDREF")); + so->so_state &= ~SS_NOFDREF; + SOCK_UNLOCK(so); + error = sctp_accept(so, nam); + return (error); +} + + + +/* Taken from /src/sys/kern/uipc_syscalls.c + * kern_accept modified for __Userspace__ + */ +int +user_accept(struct socket *head, struct sockaddr **name, socklen_t *namelen, struct socket **ptr_accept_ret_sock) +{ + struct sockaddr *sa = NULL; + int error; + struct socket *so = NULL; + + + if (name) { + *name = NULL; + } + + if ((head->so_options & SCTP_SO_ACCEPTCONN) == 0) { + error = EINVAL; + goto done; + } + + ACCEPT_LOCK(); + if ((head->so_state & SS_NBIO) && TAILQ_EMPTY(&head->so_comp)) { + ACCEPT_UNLOCK(); + error = EWOULDBLOCK; + goto noconnection; + } + while (TAILQ_EMPTY(&head->so_comp) && head->so_error == 0) { + if (head->so_rcv.sb_state & SBS_CANTRCVMORE) { + head->so_error = ECONNABORTED; + break; + } +#if defined(_WIN32) + if (SleepConditionVariableCS(&accept_cond, &accept_mtx, INFINITE)) + error = 0; + else + error = GetLastError(); +#else + error = pthread_cond_wait(&accept_cond, &accept_mtx); +#endif + if (error) { + ACCEPT_UNLOCK(); + goto noconnection; + } + } + if (head->so_error) { + error = head->so_error; + head->so_error = 0; + ACCEPT_UNLOCK(); + goto noconnection; + } + so = TAILQ_FIRST(&head->so_comp); + KASSERT(!(so->so_qstate & SQ_INCOMP), ("accept1: so SQ_INCOMP")); + KASSERT(so->so_qstate & SQ_COMP, ("accept1: so not SQ_COMP")); + + /* + * Before changing the flags on the socket, we have to bump the + * reference count. Otherwise, if the protocol calls sofree(), + * the socket will be released due to a zero refcount. + */ + SOCK_LOCK(so); /* soref() and so_state update */ + soref(so); /* file descriptor reference */ + + TAILQ_REMOVE(&head->so_comp, so, so_list); + head->so_qlen--; + so->so_state |= (head->so_state & SS_NBIO); + so->so_qstate &= ~SQ_COMP; + so->so_head = NULL; + SOCK_UNLOCK(so); + ACCEPT_UNLOCK(); + + + /* + * The original accept returns fd value via td->td_retval[0] = fd; + * we will return the socket for accepted connection. + */ + + error = soaccept(so, &sa); + if (error) { + /* + * return a namelen of zero for older code which might + * ignore the return value from accept. + */ + if (name) + *namelen = 0; + goto noconnection; + } + if (sa == NULL) { + if (name) + *namelen = 0; + goto done; + } + if (name) { +#ifdef HAVE_SA_LEN + /* check sa_len before it is destroyed */ + if (*namelen > sa->sa_len) { + *namelen = sa->sa_len; + } +#else + socklen_t sa_len; + + switch (sa->sa_family) { +#ifdef INET + case AF_INET: + sa_len = sizeof(struct sockaddr_in); + break; +#endif +#ifdef INET6 + case AF_INET6: + sa_len = sizeof(struct sockaddr_in6); + break; +#endif + case AF_CONN: + sa_len = sizeof(struct sockaddr_conn); + break; + default: + sa_len = 0; + break; + } + if (*namelen > sa_len) { + *namelen = sa_len; + } +#endif + *name = sa; + sa = NULL; + } +noconnection: + if (sa) { + FREE(sa, M_SONAME); + } + +done: + *ptr_accept_ret_sock = so; + return (error); +} + + + +/* Taken from /src/sys/kern/uipc_syscalls.c + * and modified for __Userspace__ + */ +/* + * accept1() + */ +static int +accept1(struct socket *so, struct sockaddr *aname, socklen_t *anamelen, struct socket **ptr_accept_ret_sock) +{ + struct sockaddr *name; + socklen_t namelen; + int error; + + if (so == NULL) { + return (EBADF); + } + if (aname == NULL) { + return (user_accept(so, NULL, NULL, ptr_accept_ret_sock)); + } + + error = copyin(anamelen, &namelen, sizeof (namelen)); + if (error) + return (error); + + error = user_accept(so, &name, &namelen, ptr_accept_ret_sock); + + /* + * return a namelen of zero for older code which might + * ignore the return value from accept. + */ + if (error) { + (void) copyout(&namelen, + anamelen, sizeof(*anamelen)); + return (error); + } + + if (error == 0 && name != NULL) { + error = copyout(name, aname, namelen); + } + if (error == 0) { + error = copyout(&namelen, anamelen, sizeof(namelen)); + } + + if (name) { + FREE(name, M_SONAME); + } + return (error); +} + +struct socket * +usrsctp_accept(struct socket *so, struct sockaddr *aname, socklen_t *anamelen) +{ + struct socket *accept_return_sock = NULL; + + errno = accept1(so, aname, anamelen, &accept_return_sock); + if (errno) { + return (NULL); + } else { + return (accept_return_sock); + } +} + +struct socket * +userspace_accept(struct socket *so, struct sockaddr *aname, socklen_t *anamelen) +{ + return (usrsctp_accept(so, aname, anamelen)); +} + +struct socket * +usrsctp_peeloff(struct socket *head, sctp_assoc_t id) +{ + struct socket *so; + + if ((errno = sctp_can_peel_off(head, id)) != 0) { + return (NULL); + } + if ((so = sonewconn(head, SS_ISCONNECTED)) == NULL) { + return (NULL); + } + ACCEPT_LOCK(); + SOCK_LOCK(so); + soref(so); + TAILQ_REMOVE(&head->so_comp, so, so_list); + head->so_qlen--; + so->so_state |= (head->so_state & SS_NBIO); + so->so_qstate &= ~SQ_COMP; + so->so_head = NULL; + SOCK_UNLOCK(so); + ACCEPT_UNLOCK(); + if ((errno = sctp_do_peeloff(head, so, id)) != 0) { + so->so_count = 0; + sodealloc(so); + return (NULL); + } + return (so); +} + +int +sodisconnect(struct socket *so) +{ + int error; + + if ((so->so_state & SS_ISCONNECTED) == 0) + return (ENOTCONN); + if (so->so_state & SS_ISDISCONNECTING) + return (EALREADY); + error = sctp_disconnect(so); + return (error); +} + +int +usrsctp_set_non_blocking(struct socket *so, int onoff) +{ + if (so == NULL) { + errno = EBADF; + return (-1); + } + SOCK_LOCK(so); + if (onoff != 0) { + so->so_state |= SS_NBIO; + } else { + so->so_state &= ~SS_NBIO; + } + SOCK_UNLOCK(so); + return (0); +} + +int +usrsctp_get_non_blocking(struct socket *so) +{ + int result; + + if (so == NULL) { + errno = EBADF; + return (-1); + } + SOCK_LOCK(so); + if (so->so_state & SS_NBIO) { + result = 1; + } else { + result = 0; + } + SOCK_UNLOCK(so); + return (result); +} + +int +soconnect(struct socket *so, struct sockaddr *nam) +{ + int error; + + if (so->so_options & SCTP_SO_ACCEPTCONN) + return (EOPNOTSUPP); + /* + * If protocol is connection-based, can only connect once. + * Otherwise, if connected, try to disconnect first. This allows + * user to disconnect by connecting to, e.g., a null address. + */ + if (so->so_state & (SS_ISCONNECTED|SS_ISCONNECTING) && (sodisconnect(so) != 0)) { + error = EISCONN; + } else { + /* + * Prevent accumulated error from previous connection from + * biting us. + */ + so->so_error = 0; + switch (nam->sa_family) { +#if defined(INET) + case AF_INET: + error = sctp_connect(so, nam); + break; +#endif +#if defined(INET6) + case AF_INET6: + error = sctp6_connect(so, nam); + break; +#endif + case AF_CONN: + error = sctpconn_connect(so, nam); + break; + default: + error = EAFNOSUPPORT; + } + } + + return (error); +} + + + +int user_connect(struct socket *so, struct sockaddr *sa) +{ + int error; + int interrupted = 0; + + if (so == NULL) { + error = EBADF; + goto done1; + } + if (so->so_state & SS_ISCONNECTING) { + error = EALREADY; + goto done1; + } + + error = soconnect(so, sa); + if (error) { + goto bad; + } + if ((so->so_state & SS_NBIO) && (so->so_state & SS_ISCONNECTING)) { + error = EINPROGRESS; + goto done1; + } + + SOCK_LOCK(so); + while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) { +#if defined(_WIN32) + if (SleepConditionVariableCS(SOCK_COND(so), SOCK_MTX(so), INFINITE)) + error = 0; + else + error = -1; +#else + error = pthread_cond_wait(SOCK_COND(so), SOCK_MTX(so)); +#endif + if (error) { +#if defined(__NetBSD__) + if (error == EINTR) { +#else + if (error == EINTR || error == ERESTART) { +#endif + interrupted = 1; + } + break; + } + } + if (error == 0) { + error = so->so_error; + so->so_error = 0; + } + SOCK_UNLOCK(so); + +bad: + if (!interrupted) { + so->so_state &= ~SS_ISCONNECTING; + } +#if !defined(__NetBSD__) + if (error == ERESTART) { + error = EINTR; + } +#endif +done1: + return (error); +} + +int usrsctp_connect(struct socket *so, struct sockaddr *name, int namelen) +{ + struct sockaddr *sa = NULL; + + errno = getsockaddr(&sa, (caddr_t)name, namelen); + if (errno) + return (-1); + + errno = user_connect(so, sa); + FREE(sa, M_SONAME); + if (errno) { + return (-1); + } else { + return (0); + } +} + +int userspace_connect(struct socket *so, struct sockaddr *name, int namelen) +{ + return (usrsctp_connect(so, name, namelen)); +} + +#define SCTP_STACK_BUF_SIZE 2048 + +void +usrsctp_close(struct socket *so) { + if (so != NULL) { + if (so->so_options & SCTP_SO_ACCEPTCONN) { + struct socket *sp; + + ACCEPT_LOCK(); + while ((sp = TAILQ_FIRST(&so->so_comp)) != NULL) { + TAILQ_REMOVE(&so->so_comp, sp, so_list); + so->so_qlen--; + sp->so_qstate &= ~SQ_COMP; + sp->so_head = NULL; + ACCEPT_UNLOCK(); + soabort(sp); + ACCEPT_LOCK(); + } + ACCEPT_UNLOCK(); + } + ACCEPT_LOCK(); + SOCK_LOCK(so); + sorele(so); + } +} + +void +userspace_close(struct socket *so) +{ + usrsctp_close(so); +} + +int +usrsctp_shutdown(struct socket *so, int how) +{ + if (!(how == SHUT_RD || how == SHUT_WR || how == SHUT_RDWR)) { + errno = EINVAL; + return (-1); + } + if (so == NULL) { + errno = EBADF; + return (-1); + } + sctp_flush(so, how); + if (how != SHUT_WR) + socantrcvmore(so); + if (how != SHUT_RD) { + errno = sctp_shutdown(so); + if (errno) { + return (-1); + } else { + return (0); + } + } + return (0); +} + +int +userspace_shutdown(struct socket *so, int how) +{ + return (usrsctp_shutdown(so, how)); +} + +int +usrsctp_finish(void) +{ + if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { + return (0); + } + if (SCTP_INP_INFO_TRYLOCK()) { + if (!LIST_EMPTY(&SCTP_BASE_INFO(listhead))) { + SCTP_INP_INFO_RUNLOCK(); + return (-1); + } + SCTP_INP_INFO_RUNLOCK(); + } else { + return (-1); + } + sctp_finish(); +#if defined(_WIN32) + DeleteConditionVariable(&accept_cond); + DeleteCriticalSection(&accept_mtx); +#if defined(INET) || defined(INET6) + WSACleanup(); +#endif +#else + pthread_cond_destroy(&accept_cond); + pthread_mutex_destroy(&accept_mtx); +#endif + return (0); +} + +int +userspace_finish(void) +{ + return (usrsctp_finish()); +} + +/* needed from sctp_usrreq.c */ +int +sctp_setopt(struct socket *so, int optname, void *optval, size_t optsize, void *p); + +int +usrsctp_setsockopt(struct socket *so, int level, int option_name, + const void *option_value, socklen_t option_len) +{ + if (so == NULL) { + errno = EBADF; + return (-1); + } + switch (level) { + case SOL_SOCKET: + { + switch (option_name) { + case SO_RCVBUF: + if (option_len < (socklen_t)sizeof(int)) { + errno = EINVAL; + return (-1); + } else { + int *buf_size; + + buf_size = (int *)option_value; + if (*buf_size < 1) { + errno = EINVAL; + return (-1); + } + sbreserve(&so->so_rcv, (u_long)*buf_size, so); + return (0); + } + break; + case SO_SNDBUF: + if (option_len < (socklen_t)sizeof(int)) { + errno = EINVAL; + return (-1); + } else { + int *buf_size; + + buf_size = (int *)option_value; + if (*buf_size < 1) { + errno = EINVAL; + return (-1); + } + sbreserve(&so->so_snd, (u_long)*buf_size, so); + return (0); + } + break; + case SO_LINGER: + if (option_len < (socklen_t)sizeof(struct linger)) { + errno = EINVAL; + return (-1); + } else { + struct linger *l; + + l = (struct linger *)option_value; + so->so_linger = l->l_linger; + if (l->l_onoff) { + so->so_options |= SCTP_SO_LINGER; + } else { + so->so_options &= ~SCTP_SO_LINGER; + } + return (0); + } + default: + errno = EINVAL; + return (-1); + } + } + case IPPROTO_SCTP: + errno = sctp_setopt(so, option_name, (void *) option_value, (size_t)option_len, NULL); + if (errno) { + return (-1); + } else { + return (0); + } + default: + errno = ENOPROTOOPT; + return (-1); + } +} + +int +userspace_setsockopt(struct socket *so, int level, int option_name, + const void *option_value, socklen_t option_len) +{ + return (usrsctp_setsockopt(so, level, option_name, option_value, option_len)); +} + +/* needed from sctp_usrreq.c */ +int +sctp_getopt(struct socket *so, int optname, void *optval, size_t *optsize, + void *p); + +int +usrsctp_getsockopt(struct socket *so, int level, int option_name, + void *option_value, socklen_t *option_len) +{ + if (so == NULL) { + errno = EBADF; + return (-1); + } + if (option_len == NULL) { + errno = EFAULT; + return (-1); + } + switch (level) { + case SOL_SOCKET: + switch (option_name) { + case SO_RCVBUF: + if (*option_len < (socklen_t)sizeof(int)) { + errno = EINVAL; + return (-1); + } else { + int *buf_size; + + buf_size = (int *)option_value; + *buf_size = so->so_rcv.sb_hiwat; + *option_len = (socklen_t)sizeof(int); + return (0); + } + break; + case SO_SNDBUF: + if (*option_len < (socklen_t)sizeof(int)) { + errno = EINVAL; + return (-1); + } else { + int *buf_size; + + buf_size = (int *)option_value; + *buf_size = so->so_snd.sb_hiwat; + *option_len = (socklen_t)sizeof(int); + return (0); + } + break; + case SO_LINGER: + if (*option_len < (socklen_t)sizeof(struct linger)) { + errno = EINVAL; + return (-1); + } else { + struct linger *l; + + l = (struct linger *)option_value; + l->l_linger = so->so_linger; + if (so->so_options & SCTP_SO_LINGER) { + l->l_onoff = 1; + } else { + l->l_onoff = 0; + } + *option_len = (socklen_t)sizeof(struct linger); + return (0); + } + break; + case SO_ERROR: + if (*option_len < (socklen_t)sizeof(int)) { + errno = EINVAL; + return (-1); + } else { + int *intval; + + intval = (int *)option_value; + *intval = so->so_error; + *option_len = (socklen_t)sizeof(int); + return (0); + } + break; + default: + errno = EINVAL; + return (-1); + } + case IPPROTO_SCTP: + { + size_t len; + + len = (size_t)*option_len; + errno = sctp_getopt(so, option_name, option_value, &len, NULL); + *option_len = (socklen_t)len; + if (errno) { + return (-1); + } else { + return (0); + } + } + default: + errno = ENOPROTOOPT; + return (-1); + } +} + +int +userspace_getsockopt(struct socket *so, int level, int option_name, + void *option_value, socklen_t *option_len) +{ + return (usrsctp_getsockopt(so, level, option_name, option_value, option_len)); +} + +int +usrsctp_opt_info(struct socket *so, sctp_assoc_t id, int opt, void *arg, socklen_t *size) +{ + if (arg == NULL) { + errno = EINVAL; + return (-1); + } + if ((id == SCTP_CURRENT_ASSOC) || + (id == SCTP_ALL_ASSOC)) { + errno = EINVAL; + return (-1); + } + switch (opt) { + case SCTP_RTOINFO: + ((struct sctp_rtoinfo *)arg)->srto_assoc_id = id; + break; + case SCTP_ASSOCINFO: + ((struct sctp_assocparams *)arg)->sasoc_assoc_id = id; + break; + case SCTP_DEFAULT_SEND_PARAM: + ((struct sctp_assocparams *)arg)->sasoc_assoc_id = id; + break; + case SCTP_PRIMARY_ADDR: + ((struct sctp_setprim *)arg)->ssp_assoc_id = id; + break; + case SCTP_PEER_ADDR_PARAMS: + ((struct sctp_paddrparams *)arg)->spp_assoc_id = id; + break; + case SCTP_MAXSEG: + ((struct sctp_assoc_value *)arg)->assoc_id = id; + break; + case SCTP_AUTH_KEY: + ((struct sctp_authkey *)arg)->sca_assoc_id = id; + break; + case SCTP_AUTH_ACTIVE_KEY: + ((struct sctp_authkeyid *)arg)->scact_assoc_id = id; + break; + case SCTP_DELAYED_SACK: + ((struct sctp_sack_info *)arg)->sack_assoc_id = id; + break; + case SCTP_CONTEXT: + ((struct sctp_assoc_value *)arg)->assoc_id = id; + break; + case SCTP_STATUS: + ((struct sctp_status *)arg)->sstat_assoc_id = id; + break; + case SCTP_GET_PEER_ADDR_INFO: + ((struct sctp_paddrinfo *)arg)->spinfo_assoc_id = id; + break; + case SCTP_PEER_AUTH_CHUNKS: + ((struct sctp_authchunks *)arg)->gauth_assoc_id = id; + break; + case SCTP_LOCAL_AUTH_CHUNKS: + ((struct sctp_authchunks *)arg)->gauth_assoc_id = id; + break; + case SCTP_TIMEOUTS: + ((struct sctp_timeouts *)arg)->stimo_assoc_id = id; + break; + case SCTP_EVENT: + ((struct sctp_event *)arg)->se_assoc_id = id; + break; + case SCTP_DEFAULT_SNDINFO: + ((struct sctp_sndinfo *)arg)->snd_assoc_id = id; + break; + case SCTP_DEFAULT_PRINFO: + ((struct sctp_default_prinfo *)arg)->pr_assoc_id = id; + break; + case SCTP_PEER_ADDR_THLDS: + ((struct sctp_paddrthlds *)arg)->spt_assoc_id = id; + break; + case SCTP_REMOTE_UDP_ENCAPS_PORT: + ((struct sctp_udpencaps *)arg)->sue_assoc_id = id; + break; + case SCTP_ECN_SUPPORTED: + ((struct sctp_assoc_value *)arg)->assoc_id = id; + break; + case SCTP_PR_SUPPORTED: + ((struct sctp_assoc_value *)arg)->assoc_id = id; + break; + case SCTP_AUTH_SUPPORTED: + ((struct sctp_assoc_value *)arg)->assoc_id = id; + break; + case SCTP_ASCONF_SUPPORTED: + ((struct sctp_assoc_value *)arg)->assoc_id = id; + break; + case SCTP_RECONFIG_SUPPORTED: + ((struct sctp_assoc_value *)arg)->assoc_id = id; + break; + case SCTP_NRSACK_SUPPORTED: + ((struct sctp_assoc_value *)arg)->assoc_id = id; + break; + case SCTP_PKTDROP_SUPPORTED: + ((struct sctp_assoc_value *)arg)->assoc_id = id; + break; + case SCTP_MAX_BURST: + ((struct sctp_assoc_value *)arg)->assoc_id = id; + break; + case SCTP_ENABLE_STREAM_RESET: + ((struct sctp_assoc_value *)arg)->assoc_id = id; + break; + case SCTP_PR_STREAM_STATUS: + ((struct sctp_prstatus *)arg)->sprstat_assoc_id = id; + break; + case SCTP_PR_ASSOC_STATUS: + ((struct sctp_prstatus *)arg)->sprstat_assoc_id = id; + break; + case SCTP_MAX_CWND: + ((struct sctp_assoc_value *)arg)->assoc_id = id; + break; + default: + break; + } + return (usrsctp_getsockopt(so, IPPROTO_SCTP, opt, arg, size)); +} + +int +usrsctp_set_ulpinfo(struct socket *so, void *ulp_info) +{ + return (register_ulp_info(so, ulp_info)); +} + + +int +usrsctp_get_ulpinfo(struct socket *so, void **pulp_info) +{ + return (retrieve_ulp_info(so, pulp_info)); +} + +int +usrsctp_bindx(struct socket *so, struct sockaddr *addrs, int addrcnt, int flags) +{ + struct sockaddr *sa; +#ifdef INET + struct sockaddr_in *sin; +#endif +#ifdef INET6 + struct sockaddr_in6 *sin6; +#endif + int i; +#if defined(INET) || defined(INET6) + uint16_t sport; + bool fix_port; +#endif + + /* validate the flags */ + if ((flags != SCTP_BINDX_ADD_ADDR) && + (flags != SCTP_BINDX_REM_ADDR)) { + errno = EFAULT; + return (-1); + } + /* validate the address count and list */ + if ((addrcnt <= 0) || (addrs == NULL)) { + errno = EINVAL; + return (-1); + } +#if defined(INET) || defined(INET6) + sport = 0; + fix_port = false; +#endif + /* First pre-screen the addresses */ + sa = addrs; + for (i = 0; i < addrcnt; i++) { + switch (sa->sa_family) { +#ifdef INET + case AF_INET: +#ifdef HAVE_SA_LEN + if (sa->sa_len != sizeof(struct sockaddr_in)) { + errno = EINVAL; + return (-1); + } +#endif + sin = (struct sockaddr_in *)sa; + if (sin->sin_port) { + /* non-zero port, check or save */ + if (sport) { + /* Check against our port */ + if (sport != sin->sin_port) { + errno = EINVAL; + return (-1); + } + } else { + /* save off the port */ + sport = sin->sin_port; + fix_port = (i > 0); + } + } +#ifndef HAVE_SA_LEN + sa = (struct sockaddr *)((caddr_t)sa + sizeof(struct sockaddr_in)); +#endif + break; +#endif +#ifdef INET6 + case AF_INET6: +#ifdef HAVE_SA_LEN + if (sa->sa_len != sizeof(struct sockaddr_in6)) { + errno = EINVAL; + return (-1); + } +#endif + sin6 = (struct sockaddr_in6 *)sa; + if (sin6->sin6_port) { + /* non-zero port, check or save */ + if (sport) { + /* Check against our port */ + if (sport != sin6->sin6_port) { + errno = EINVAL; + return (-1); + } + } else { + /* save off the port */ + sport = sin6->sin6_port; + fix_port = (i > 0); + } + } +#ifndef HAVE_SA_LEN + sa = (struct sockaddr *)((caddr_t)sa + sizeof(struct sockaddr_in6)); +#endif + break; +#endif + default: + /* Invalid address family specified. */ + errno = EAFNOSUPPORT; + return (-1); + } +#ifdef HAVE_SA_LEN + sa = (struct sockaddr *)((caddr_t)sa + sa->sa_len); +#endif + } + sa = addrs; + for (i = 0; i < addrcnt; i++) { +#ifndef HAVE_SA_LEN + size_t sa_len; + +#endif +#ifdef HAVE_SA_LEN +#if defined(INET) || defined(INET6) + if (fix_port) { + switch (sa->sa_family) { +#ifdef INET + case AF_INET: + ((struct sockaddr_in *)sa)->sin_port = sport; + break; +#endif +#ifdef INET6 + case AF_INET6: + ((struct sockaddr_in6 *)sa)->sin6_port = sport; + break; +#endif + } + } +#endif + if (usrsctp_setsockopt(so, IPPROTO_SCTP, flags, sa, sa->sa_len) != 0) { + return (-1); + } + sa = (struct sockaddr *)((caddr_t)sa + sa->sa_len); +#else + switch (sa->sa_family) { +#ifdef INET + case AF_INET: + sa_len = sizeof(struct sockaddr_in); + break; +#endif +#ifdef INET6 + case AF_INET6: + sa_len = sizeof(struct sockaddr_in6); + break; +#endif + default: + sa_len = 0; + break; + } + /* + * Now, if there was a port mentioned, assure that the + * first address has that port to make sure it fails or + * succeeds correctly. + */ +#if defined(INET) || defined(INET6) + if (fix_port) { + switch (sa->sa_family) { +#ifdef INET + case AF_INET: + ((struct sockaddr_in *)sa)->sin_port = sport; + break; +#endif +#ifdef INET6 + case AF_INET6: + ((struct sockaddr_in6 *)sa)->sin6_port = sport; + break; +#endif + } + } +#endif + if (usrsctp_setsockopt(so, IPPROTO_SCTP, flags, sa, (socklen_t)sa_len) != 0) { + return (-1); + } + sa = (struct sockaddr *)((caddr_t)sa + sa_len); +#endif + } + return (0); +} + +int +usrsctp_connectx(struct socket *so, + const struct sockaddr *addrs, int addrcnt, + sctp_assoc_t *id) +{ +#if defined(INET) || defined(INET6) + char buf[SCTP_STACK_BUF_SIZE]; + int i, ret, cnt, *aa; + char *cpto; + const struct sockaddr *at; + sctp_assoc_t *p_id; + size_t len = sizeof(int); + + /* validate the address count and list */ + if ((addrs == NULL) || (addrcnt <= 0)) { + errno = EINVAL; + return (-1); + } + at = addrs; + cnt = 0; + cpto = ((caddr_t)buf + sizeof(int)); + /* validate all the addresses and get the size */ + for (i = 0; i < addrcnt; i++) { + switch (at->sa_family) { +#ifdef INET + case AF_INET: +#ifdef HAVE_SA_LEN + if (at->sa_len != sizeof(struct sockaddr_in)) { + errno = EINVAL; + return (-1); + } +#endif + len += sizeof(struct sockaddr_in); + if (len > SCTP_STACK_BUF_SIZE) { + errno = ENOMEM; + return (-1); + } + memcpy(cpto, at, sizeof(struct sockaddr_in)); + cpto = ((caddr_t)cpto + sizeof(struct sockaddr_in)); + at = (struct sockaddr *)((caddr_t)at + sizeof(struct sockaddr_in)); + break; +#endif +#ifdef INET6 + case AF_INET6: +#ifdef HAVE_SA_LEN + if (at->sa_len != sizeof(struct sockaddr_in6)) { + errno = EINVAL; + return (-1); + } +#endif +#ifdef INET + if (IN6_IS_ADDR_V4MAPPED(&((struct sockaddr_in6 *)at)->sin6_addr)) { + len += sizeof(struct sockaddr_in); + if (len > SCTP_STACK_BUF_SIZE) { + errno = ENOMEM; + return (-1); + } + in6_sin6_2_sin((struct sockaddr_in *)cpto, (struct sockaddr_in6 *)at); + cpto = ((caddr_t)cpto + sizeof(struct sockaddr_in)); + } else { + len += sizeof(struct sockaddr_in6); + if (len > SCTP_STACK_BUF_SIZE) { + errno = ENOMEM; + return (-1); + } + memcpy(cpto, at, sizeof(struct sockaddr_in6)); + cpto = ((caddr_t)cpto + sizeof(struct sockaddr_in6)); + } +#else + len += sizeof(struct sockaddr_in6); + if (len > SCTP_STACK_BUF_SIZE) { + errno = ENOMEM; + return (-1); + } + memcpy(cpto, at, sizeof(struct sockaddr_in6)); + cpto = ((caddr_t)cpto + sizeof(struct sockaddr_in6)); +#endif + at = (struct sockaddr *)((caddr_t)at + sizeof(struct sockaddr_in6)); + break; +#endif + default: + errno = EINVAL; + return (-1); + } + cnt++; + } + aa = (int *)buf; + *aa = cnt; + ret = usrsctp_setsockopt(so, IPPROTO_SCTP, SCTP_CONNECT_X, (void *)buf, (socklen_t)len); + if ((ret == 0) && id) { + p_id = (sctp_assoc_t *)buf; + *id = *p_id; + } + return (ret); +#else + errno = EINVAL; + return (-1); +#endif +} + +int +usrsctp_getpaddrs(struct socket *so, sctp_assoc_t id, struct sockaddr **raddrs) +{ + struct sctp_getaddresses *addrs; + struct sockaddr *sa; + caddr_t lim; + socklen_t opt_len; + uint32_t size_of_addresses; + int cnt; + + if (raddrs == NULL) { + errno = EFAULT; + return (-1); + } + /* When calling getsockopt(), the value contains the assoc_id. */ + size_of_addresses = (uint32_t)id; + opt_len = (socklen_t)sizeof(uint32_t); + if (usrsctp_getsockopt(so, IPPROTO_SCTP, SCTP_GET_REMOTE_ADDR_SIZE, &size_of_addresses, &opt_len) != 0) { + if (errno == ENOENT) { + return (0); + } else { + return (-1); + } + } + opt_len = (socklen_t)((size_t)size_of_addresses + sizeof(struct sctp_getaddresses)); + addrs = calloc(1, (size_t)opt_len); + if (addrs == NULL) { + errno = ENOMEM; + return (-1); + } + addrs->sget_assoc_id = id; + /* Now lets get the array of addresses */ + if (usrsctp_getsockopt(so, IPPROTO_SCTP, SCTP_GET_PEER_ADDRESSES, addrs, &opt_len) != 0) { + free(addrs); + return (-1); + } + *raddrs = &addrs->addr[0].sa; + cnt = 0; + sa = &addrs->addr[0].sa; + lim = (caddr_t)addrs + opt_len; +#ifdef HAVE_SA_LEN + while (((caddr_t)sa < lim) && (sa->sa_len > 0)) { + sa = (struct sockaddr *)((caddr_t)sa + sa->sa_len); +#else + while ((caddr_t)sa < lim) { + switch (sa->sa_family) { +#ifdef INET + case AF_INET: + sa = (struct sockaddr *)((caddr_t)sa + sizeof(struct sockaddr_in)); + break; +#endif +#ifdef INET6 + case AF_INET6: + sa = (struct sockaddr *)((caddr_t)sa + sizeof(struct sockaddr_in6)); + break; +#endif + case AF_CONN: + sa = (struct sockaddr *)((caddr_t)sa + sizeof(struct sockaddr_conn)); + break; + default: + return (cnt); + break; + } +#endif + cnt++; + } + return (cnt); +} + +void +usrsctp_freepaddrs(struct sockaddr *addrs) +{ + /* Take away the hidden association id */ + void *fr_addr; + + fr_addr = (void *)((caddr_t)addrs - offsetof(struct sctp_getaddresses, addr)); + /* Now free it */ + free(fr_addr); +} + +int +usrsctp_getladdrs(struct socket *so, sctp_assoc_t id, struct sockaddr **raddrs) +{ + struct sctp_getaddresses *addrs; + struct sockaddr *sa; + caddr_t lim; + socklen_t opt_len; + uint32_t size_of_addresses; + int cnt; + + if (raddrs == NULL) { + errno = EFAULT; + return (-1); + } + size_of_addresses = 0; + opt_len = (socklen_t)sizeof(uint32_t); + if (usrsctp_getsockopt(so, IPPROTO_SCTP, SCTP_GET_LOCAL_ADDR_SIZE, &size_of_addresses, &opt_len) != 0) { + return (-1); + } + opt_len = (socklen_t)(size_of_addresses + sizeof(struct sctp_getaddresses)); + addrs = calloc(1, (size_t)opt_len); + if (addrs == NULL) { + errno = ENOMEM; + return (-1); + } + addrs->sget_assoc_id = id; + /* Now lets get the array of addresses */ + if (usrsctp_getsockopt(so, IPPROTO_SCTP, SCTP_GET_LOCAL_ADDRESSES, addrs, &opt_len) != 0) { + free(addrs); + return (-1); + } + if (size_of_addresses == 0) { + free(addrs); + return (0); + } + *raddrs = &addrs->addr[0].sa; + cnt = 0; + sa = &addrs->addr[0].sa; + lim = (caddr_t)addrs + opt_len; +#ifdef HAVE_SA_LEN + while (((caddr_t)sa < lim) && (sa->sa_len > 0)) { + sa = (struct sockaddr *)((caddr_t)sa + sa->sa_len); +#else + while ((caddr_t)sa < lim) { + switch (sa->sa_family) { +#ifdef INET + case AF_INET: + sa = (struct sockaddr *)((caddr_t)sa + sizeof(struct sockaddr_in)); + break; +#endif +#ifdef INET6 + case AF_INET6: + sa = (struct sockaddr *)((caddr_t)sa + sizeof(struct sockaddr_in6)); + break; +#endif + case AF_CONN: + sa = (struct sockaddr *)((caddr_t)sa + sizeof(struct sockaddr_conn)); + break; + default: + return (cnt); + break; + } +#endif + cnt++; + } + return (cnt); +} + +void +usrsctp_freeladdrs(struct sockaddr *addrs) +{ + /* Take away the hidden association id */ + void *fr_addr; + + fr_addr = (void *)((caddr_t)addrs - offsetof(struct sctp_getaddresses, addr)); + /* Now free it */ + free(fr_addr); +} + +#ifdef INET +void +sctp_userspace_ip_output(int *result, struct mbuf *o_pak, + sctp_route_t *ro, void *inp, + uint32_t vrf_id) +{ + struct mbuf *m; + struct mbuf *m_orig; + int iovcnt; + int len; + struct ip *ip; + struct udphdr *udp; + struct sockaddr_in dst; +#if defined(_WIN32) + WSAMSG win_msg_hdr; + DWORD win_sent_len; + WSABUF send_iovec[MAXLEN_MBUF_CHAIN]; + WSABUF winbuf; +#else + struct iovec send_iovec[MAXLEN_MBUF_CHAIN]; + struct msghdr msg_hdr; +#endif + int use_udp_tunneling; + + *result = 0; + + m = SCTP_HEADER_TO_CHAIN(o_pak); + m_orig = m; + + len = sizeof(struct ip); + if (SCTP_BUF_LEN(m) < len) { + if ((m = m_pullup(m, len)) == 0) { + SCTP_PRINTF("Can not get the IP header in the first mbuf.\n"); + return; + } + } + ip = mtod(m, struct ip *); + use_udp_tunneling = (ip->ip_p == IPPROTO_UDP); + + if (use_udp_tunneling) { + len = sizeof(struct ip) + sizeof(struct udphdr); + if (SCTP_BUF_LEN(m) < len) { + if ((m = m_pullup(m, len)) == 0) { + SCTP_PRINTF("Can not get the UDP/IP header in the first mbuf.\n"); + return; + } + ip = mtod(m, struct ip *); + } + udp = (struct udphdr *)(ip + 1); + } else { + udp = NULL; + } + + if (!use_udp_tunneling) { + if (ip->ip_src.s_addr == INADDR_ANY) { + /* TODO get addr of outgoing interface */ + SCTP_PRINTF("Why did the SCTP implementation did not choose a source address?\n"); + } + /* TODO need to worry about ro->ro_dst as in ip_output? */ +#if defined(__linux__) || defined(_WIN32) || (defined(__FreeBSD__) && (__FreeBSD_version >= 1100030)) + /* need to put certain fields into network order for Linux */ + ip->ip_len = htons(ip->ip_len); +#endif + } + + memset((void *)&dst, 0, sizeof(struct sockaddr_in)); + dst.sin_family = AF_INET; + dst.sin_addr.s_addr = ip->ip_dst.s_addr; +#ifdef HAVE_SIN_LEN + dst.sin_len = sizeof(struct sockaddr_in); +#endif + if (use_udp_tunneling) { + dst.sin_port = udp->uh_dport; + } else { + dst.sin_port = 0; + } + + /* tweak the mbuf chain */ + if (use_udp_tunneling) { + m_adj(m, sizeof(struct ip) + sizeof(struct udphdr)); + } + + for (iovcnt = 0; m != NULL && iovcnt < MAXLEN_MBUF_CHAIN; m = m->m_next, iovcnt++) { +#if !defined(_WIN32) + send_iovec[iovcnt].iov_base = (caddr_t)m->m_data; + send_iovec[iovcnt].iov_len = SCTP_BUF_LEN(m); +#else + send_iovec[iovcnt].buf = (caddr_t)m->m_data; + send_iovec[iovcnt].len = SCTP_BUF_LEN(m); +#endif + } + + if (m != NULL) { + SCTP_PRINTF("mbuf chain couldn't be copied completely\n"); + goto free_mbuf; + } + +#if !defined(_WIN32) + msg_hdr.msg_name = (struct sockaddr *) &dst; + msg_hdr.msg_namelen = sizeof(struct sockaddr_in); + msg_hdr.msg_iov = send_iovec; + msg_hdr.msg_iovlen = iovcnt; + msg_hdr.msg_control = NULL; + msg_hdr.msg_controllen = 0; + msg_hdr.msg_flags = 0; + + if ((!use_udp_tunneling) && (SCTP_BASE_VAR(userspace_rawsctp) != -1)) { + if (sendmsg(SCTP_BASE_VAR(userspace_rawsctp), &msg_hdr, MSG_DONTWAIT) < 0) { + *result = errno; + } + } + if ((use_udp_tunneling) && (SCTP_BASE_VAR(userspace_udpsctp) != -1)) { + if (sendmsg(SCTP_BASE_VAR(userspace_udpsctp), &msg_hdr, MSG_DONTWAIT) < 0) { + *result = errno; + } + } +#else + win_msg_hdr.name = (struct sockaddr *) &dst; + win_msg_hdr.namelen = sizeof(struct sockaddr_in); + win_msg_hdr.lpBuffers = (LPWSABUF)send_iovec; + win_msg_hdr.dwBufferCount = iovcnt; + winbuf.len = 0; + winbuf.buf = NULL; + win_msg_hdr.Control = winbuf; + win_msg_hdr.dwFlags = 0; + + if ((!use_udp_tunneling) && (SCTP_BASE_VAR(userspace_rawsctp) != -1)) { + if (WSASendTo(SCTP_BASE_VAR(userspace_rawsctp), (LPWSABUF) send_iovec, iovcnt, &win_sent_len, win_msg_hdr.dwFlags, win_msg_hdr.name, (int) win_msg_hdr.namelen, NULL, NULL) != 0) { + *result = WSAGetLastError(); + } + } + if ((use_udp_tunneling) && (SCTP_BASE_VAR(userspace_udpsctp) != -1)) { + if (WSASendTo(SCTP_BASE_VAR(userspace_udpsctp), (LPWSABUF) send_iovec, iovcnt, &win_sent_len, win_msg_hdr.dwFlags, win_msg_hdr.name, (int) win_msg_hdr.namelen, NULL, NULL) != 0) { + *result = WSAGetLastError(); + } + } +#endif +free_mbuf: + sctp_m_freem(m_orig); +} +#endif + +#if defined(INET6) +void sctp_userspace_ip6_output(int *result, struct mbuf *o_pak, + struct route_in6 *ro, void *inp, + uint32_t vrf_id) +{ + struct mbuf *m; + struct mbuf *m_orig; + int iovcnt; + int len; + struct ip6_hdr *ip6; + struct udphdr *udp; + struct sockaddr_in6 dst; +#if defined(_WIN32) + WSAMSG win_msg_hdr; + DWORD win_sent_len; + WSABUF send_iovec[MAXLEN_MBUF_CHAIN]; + WSABUF winbuf; +#else + struct iovec send_iovec[MAXLEN_MBUF_CHAIN]; + struct msghdr msg_hdr; +#endif + int use_udp_tunneling; + + *result = 0; + + m = SCTP_HEADER_TO_CHAIN(o_pak); + m_orig = m; + + len = sizeof(struct ip6_hdr); + + if (SCTP_BUF_LEN(m) < len) { + if ((m = m_pullup(m, len)) == 0) { + SCTP_PRINTF("Can not get the IP header in the first mbuf.\n"); + return; + } + } + + ip6 = mtod(m, struct ip6_hdr *); + use_udp_tunneling = (ip6->ip6_nxt == IPPROTO_UDP); + + if (use_udp_tunneling) { + len = sizeof(struct ip6_hdr) + sizeof(struct udphdr); + if (SCTP_BUF_LEN(m) < len) { + if ((m = m_pullup(m, len)) == 0) { + SCTP_PRINTF("Can not get the UDP/IP header in the first mbuf.\n"); + return; + } + ip6 = mtod(m, struct ip6_hdr *); + } + udp = (struct udphdr *)(ip6 + 1); + } else { + udp = NULL; + } + + if (!use_udp_tunneling) { + if (ip6->ip6_src.s6_addr == in6addr_any.s6_addr) { + /* TODO get addr of outgoing interface */ + SCTP_PRINTF("Why did the SCTP implementation did not choose a source address?\n"); + } + /* TODO need to worry about ro->ro_dst as in ip_output? */ + } + + memset((void *)&dst, 0, sizeof(struct sockaddr_in6)); + dst.sin6_family = AF_INET6; + dst.sin6_addr = ip6->ip6_dst; +#ifdef HAVE_SIN6_LEN + dst.sin6_len = sizeof(struct sockaddr_in6); +#endif + + if (use_udp_tunneling) { + dst.sin6_port = udp->uh_dport; + } else { + dst.sin6_port = 0; + } + + /* tweak the mbuf chain */ + if (use_udp_tunneling) { + m_adj(m, sizeof(struct ip6_hdr) + sizeof(struct udphdr)); + } else { + m_adj(m, sizeof(struct ip6_hdr)); + } + + for (iovcnt = 0; m != NULL && iovcnt < MAXLEN_MBUF_CHAIN; m = m->m_next, iovcnt++) { +#if !defined(_WIN32) + send_iovec[iovcnt].iov_base = (caddr_t)m->m_data; + send_iovec[iovcnt].iov_len = SCTP_BUF_LEN(m); +#else + send_iovec[iovcnt].buf = (caddr_t)m->m_data; + send_iovec[iovcnt].len = SCTP_BUF_LEN(m); +#endif + } + if (m != NULL) { + SCTP_PRINTF("mbuf chain couldn't be copied completely\n"); + goto free_mbuf; + } + +#if !defined(_WIN32) + msg_hdr.msg_name = (struct sockaddr *) &dst; + msg_hdr.msg_namelen = sizeof(struct sockaddr_in6); + msg_hdr.msg_iov = send_iovec; + msg_hdr.msg_iovlen = iovcnt; + msg_hdr.msg_control = NULL; + msg_hdr.msg_controllen = 0; + msg_hdr.msg_flags = 0; + + if ((!use_udp_tunneling) && (SCTP_BASE_VAR(userspace_rawsctp6) != -1)) { + if (sendmsg(SCTP_BASE_VAR(userspace_rawsctp6), &msg_hdr, MSG_DONTWAIT)< 0) { + *result = errno; + } + } + if ((use_udp_tunneling) && (SCTP_BASE_VAR(userspace_udpsctp6) != -1)) { + if (sendmsg(SCTP_BASE_VAR(userspace_udpsctp6), &msg_hdr, MSG_DONTWAIT) < 0) { + *result = errno; + } + } +#else + win_msg_hdr.name = (struct sockaddr *) &dst; + win_msg_hdr.namelen = sizeof(struct sockaddr_in6); + win_msg_hdr.lpBuffers = (LPWSABUF)send_iovec; + win_msg_hdr.dwBufferCount = iovcnt; + winbuf.len = 0; + winbuf.buf = NULL; + win_msg_hdr.Control = winbuf; + win_msg_hdr.dwFlags = 0; + + if ((!use_udp_tunneling) && (SCTP_BASE_VAR(userspace_rawsctp6) != -1)) { + if (WSASendTo(SCTP_BASE_VAR(userspace_rawsctp6), (LPWSABUF) send_iovec, iovcnt, &win_sent_len, win_msg_hdr.dwFlags, win_msg_hdr.name, (int) win_msg_hdr.namelen, NULL, NULL) != 0) { + *result = WSAGetLastError(); + } + } + if ((use_udp_tunneling) && (SCTP_BASE_VAR(userspace_udpsctp6) != -1)) { + if (WSASendTo(SCTP_BASE_VAR(userspace_udpsctp6), (LPWSABUF) send_iovec, iovcnt, &win_sent_len, win_msg_hdr.dwFlags, win_msg_hdr.name, (int) win_msg_hdr.namelen, NULL, NULL) != 0) { + *result = WSAGetLastError(); + } + } +#endif +free_mbuf: + sctp_m_freem(m_orig); +} +#endif + +void +usrsctp_register_address(void *addr) +{ + struct sockaddr_conn sconn; + + memset(&sconn, 0, sizeof(struct sockaddr_conn)); + sconn.sconn_family = AF_CONN; +#ifdef HAVE_SCONN_LEN + sconn.sconn_len = sizeof(struct sockaddr_conn); +#endif + sconn.sconn_port = 0; + sconn.sconn_addr = addr; + sctp_add_addr_to_vrf(SCTP_DEFAULT_VRFID, + NULL, + 0xffffffff, + 0, + "conn", + NULL, + (struct sockaddr *)&sconn, + 0, + 0); +} + +void +usrsctp_deregister_address(void *addr) +{ + struct sockaddr_conn sconn; + + memset(&sconn, 0, sizeof(struct sockaddr_conn)); + sconn.sconn_family = AF_CONN; +#ifdef HAVE_SCONN_LEN + sconn.sconn_len = sizeof(struct sockaddr_conn); +#endif + sconn.sconn_port = 0; + sconn.sconn_addr = addr; + sctp_del_addr_from_vrf(SCTP_DEFAULT_VRFID, + (struct sockaddr *)&sconn, + 0xffffffff, + "conn"); +} + +#define PREAMBLE_FORMAT "\n%c %02d:%02d:%02d.%06ld " +#define PREAMBLE_LENGTH 19 +#define HEADER "0000 " +#define TRAILER "# SCTP_PACKET\n" + +char * +usrsctp_dumppacket(const void *buf, size_t len, int outbound) +{ + size_t i, pos; + char *dump_buf, *packet; + struct tm t; +#ifdef _WIN32 + struct timeb tb; +#else + struct timeval tv; + time_t sec; +#endif + + if ((len == 0) || (buf == NULL)) { + return (NULL); + } + if ((dump_buf = malloc(PREAMBLE_LENGTH + strlen(HEADER) + 3 * len + strlen(TRAILER) + 1)) == NULL) { + return (NULL); + } + pos = 0; +#ifdef _WIN32 + ftime(&tb); + localtime_s(&t, &tb.time); +#if defined(__MINGW32__) + if (snprintf(dump_buf, PREAMBLE_LENGTH + 1, PREAMBLE_FORMAT, + outbound ? 'O' : 'I', + t.tm_hour, t.tm_min, t.tm_sec, (long)(1000 * tb.millitm)) < 0) { + free(dump_buf); + return (NULL); + } +#else + if (_snprintf_s(dump_buf, PREAMBLE_LENGTH + 1, PREAMBLE_LENGTH, PREAMBLE_FORMAT, + outbound ? 'O' : 'I', + t.tm_hour, t.tm_min, t.tm_sec, (long)(1000 * tb.millitm)) < 0) { + free(dump_buf); + return (NULL); + } +#endif +#else + gettimeofday(&tv, NULL); + sec = (time_t)tv.tv_sec; + localtime_r((const time_t *)&sec, &t); + if (snprintf(dump_buf, PREAMBLE_LENGTH + 1, PREAMBLE_FORMAT, + outbound ? 'O' : 'I', + t.tm_hour, t.tm_min, t.tm_sec, (long)tv.tv_usec) < 0) { + free(dump_buf); + return (NULL); + } +#endif + pos += PREAMBLE_LENGTH; +#if defined(_WIN32) && !defined(__MINGW32__) + strncpy_s(dump_buf + pos, strlen(HEADER) + 1, HEADER, strlen(HEADER)); +#else + strcpy(dump_buf + pos, HEADER); +#endif + pos += strlen(HEADER); + packet = (char *)buf; + for (i = 0; i < len; i++) { + uint8_t byte, low, high; + + byte = (uint8_t)packet[i]; + high = byte / 16; + low = byte % 16; + dump_buf[pos++] = high < 10 ? '0' + high : 'a' + (high - 10); + dump_buf[pos++] = low < 10 ? '0' + low : 'a' + (low - 10); + dump_buf[pos++] = ' '; + } +#if defined(_WIN32) && !defined(__MINGW32__) + strncpy_s(dump_buf + pos, strlen(TRAILER) + 1, TRAILER, strlen(TRAILER)); +#else + strcpy(dump_buf + pos, TRAILER); +#endif + pos += strlen(TRAILER); + dump_buf[pos++] = '\0'; + return (dump_buf); +} + +void +usrsctp_freedumpbuffer(char *buf) +{ + free(buf); +} + +void +usrsctp_enable_crc32c_offload(void) +{ + SCTP_BASE_VAR(crc32c_offloaded) = 1; +} + +void +usrsctp_disable_crc32c_offload(void) +{ + SCTP_BASE_VAR(crc32c_offloaded) = 0; +} + +/* Compute the CRC32C in network byte order */ +uint32_t +usrsctp_crc32c(void *buffer, size_t length) +{ + uint32_t base = 0xffffffff; + + base = calculate_crc32c(0xffffffff, (unsigned char *)buffer, (unsigned int) length); + base = sctp_finalize_crc32c(base); + return (base); +} + +void +usrsctp_conninput(void *addr, const void *buffer, size_t length, uint8_t ecn_bits) +{ + struct sockaddr_conn src, dst; + struct mbuf *m, *mm; + struct sctphdr *sh; + struct sctp_chunkhdr *ch; + int remaining, offset; + + SCTP_STAT_INCR(sctps_recvpackets); + SCTP_STAT_INCR_COUNTER64(sctps_inpackets); + memset(&src, 0, sizeof(struct sockaddr_conn)); + src.sconn_family = AF_CONN; +#ifdef HAVE_SCONN_LEN + src.sconn_len = sizeof(struct sockaddr_conn); +#endif + src.sconn_addr = addr; + memset(&dst, 0, sizeof(struct sockaddr_conn)); + dst.sconn_family = AF_CONN; +#ifdef HAVE_SCONN_LEN + dst.sconn_len = sizeof(struct sockaddr_conn); +#endif + dst.sconn_addr = addr; + if ((m = sctp_get_mbuf_for_msg((unsigned int)length, 1, M_NOWAIT, 0, MT_DATA)) == NULL) { + return; + } + /* Set the lengths fields of the mbuf chain. + * This is expected by m_copyback(). + */ + remaining = (int)length; + for (mm = m; mm != NULL; mm = mm->m_next) { + mm->m_len = min((int)M_SIZE(mm), remaining); + m->m_pkthdr.len += mm->m_len; + remaining -= mm->m_len; + } + KASSERT(remaining == 0, ("usrsctp_conninput: %zu bytes left", remaining)); + m_copyback(m, 0, (int)length, (caddr_t)buffer); + offset = sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); + if (SCTP_BUF_LEN(m) < offset) { + if ((m = m_pullup(m, offset)) == NULL) { + SCTP_STAT_INCR(sctps_hdrops); + return; + } + } + sh = mtod(m, struct sctphdr *); + ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr)); + offset -= sizeof(struct sctp_chunkhdr); + src.sconn_port = sh->src_port; + dst.sconn_port = sh->dest_port; + sctp_common_input_processing(&m, 0, offset, (int)length, + (struct sockaddr *)&src, + (struct sockaddr *)&dst, + sh, ch, + SCTP_BASE_VAR(crc32c_offloaded) == 1 ? 0 : 1, + ecn_bits, + SCTP_DEFAULT_VRFID, 0); + if (m) { + sctp_m_freem(m); + } + return; +} + +void usrsctp_handle_timers(uint32_t elapsed_milliseconds) +{ + sctp_handle_tick(sctp_msecs_to_ticks(elapsed_milliseconds)); +} + +int +usrsctp_get_events(struct socket *so) +{ + int events = 0; + + if (so == NULL) { + errno = EBADF; + return -1; + } + + SOCK_LOCK(so); + if (soreadable(so)) { + events |= SCTP_EVENT_READ; + } + if (sowriteable(so)) { + events |= SCTP_EVENT_WRITE; + } + if (so->so_error) { + events |= SCTP_EVENT_ERROR; + } + SOCK_UNLOCK(so); + + return events; +} + +int +usrsctp_set_upcall(struct socket *so, void (*upcall)(struct socket *, void *, int), void *arg) +{ + if (so == NULL) { + errno = EBADF; + return (-1); + } + + SOCK_LOCK(so); + so->so_upcall = upcall; + so->so_upcallarg = arg; + so->so_snd.sb_flags |= SB_UPCALL; + so->so_rcv.sb_flags |= SB_UPCALL; + SOCK_UNLOCK(so); + + return (0); +} + +#define USRSCTP_TUNABLE_SET_DEF(__field, __prefix) \ +int usrsctp_tunable_set_ ## __field(uint32_t value) \ +{ \ + if ((value < __prefix##_MIN) || \ + (value > __prefix##_MAX)) { \ + errno = EINVAL; \ + return (-1); \ + } else { \ + SCTP_BASE_SYSCTL(__field) = value; \ + return (0); \ + } \ +} + +USRSCTP_TUNABLE_SET_DEF(sctp_hashtblsize, SCTPCTL_TCBHASHSIZE) +USRSCTP_TUNABLE_SET_DEF(sctp_pcbtblsize, SCTPCTL_PCBHASHSIZE) +USRSCTP_TUNABLE_SET_DEF(sctp_chunkscale, SCTPCTL_CHUNKSCALE) + +#define USRSCTP_SYSCTL_SET_DEF(__field, __prefix) \ +int usrsctp_sysctl_set_ ## __field(uint32_t value) \ +{ \ + if ((value < __prefix##_MIN) || \ + (value > __prefix##_MAX)) { \ + errno = EINVAL; \ + return (-1); \ + } else { \ + SCTP_BASE_SYSCTL(__field) = value; \ + return (0); \ + } \ +} + +#if __GNUC__ >= 5 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6) || defined(__clang__) +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wtype-limits" +#endif +USRSCTP_SYSCTL_SET_DEF(sctp_sendspace, SCTPCTL_MAXDGRAM) +USRSCTP_SYSCTL_SET_DEF(sctp_recvspace, SCTPCTL_RECVSPACE) +USRSCTP_SYSCTL_SET_DEF(sctp_auto_asconf, SCTPCTL_AUTOASCONF) +USRSCTP_SYSCTL_SET_DEF(sctp_ecn_enable, SCTPCTL_ECN_ENABLE) +USRSCTP_SYSCTL_SET_DEF(sctp_pr_enable, SCTPCTL_PR_ENABLE) +USRSCTP_SYSCTL_SET_DEF(sctp_auth_enable, SCTPCTL_AUTH_ENABLE) +USRSCTP_SYSCTL_SET_DEF(sctp_asconf_enable, SCTPCTL_ASCONF_ENABLE) +USRSCTP_SYSCTL_SET_DEF(sctp_reconfig_enable, SCTPCTL_RECONFIG_ENABLE) +USRSCTP_SYSCTL_SET_DEF(sctp_nrsack_enable, SCTPCTL_NRSACK_ENABLE) +USRSCTP_SYSCTL_SET_DEF(sctp_pktdrop_enable, SCTPCTL_PKTDROP_ENABLE) +USRSCTP_SYSCTL_SET_DEF(sctp_no_csum_on_loopback, SCTPCTL_LOOPBACK_NOCSUM) +USRSCTP_SYSCTL_SET_DEF(sctp_peer_chunk_oh, SCTPCTL_PEER_CHKOH) +USRSCTP_SYSCTL_SET_DEF(sctp_max_burst_default, SCTPCTL_MAXBURST) +USRSCTP_SYSCTL_SET_DEF(sctp_max_chunks_on_queue, SCTPCTL_MAXCHUNKS) +USRSCTP_SYSCTL_SET_DEF(sctp_min_split_point, SCTPCTL_MIN_SPLIT_POINT) +USRSCTP_SYSCTL_SET_DEF(sctp_delayed_sack_time_default, SCTPCTL_DELAYED_SACK_TIME) +USRSCTP_SYSCTL_SET_DEF(sctp_sack_freq_default, SCTPCTL_SACK_FREQ) +USRSCTP_SYSCTL_SET_DEF(sctp_system_free_resc_limit, SCTPCTL_SYS_RESOURCE) +USRSCTP_SYSCTL_SET_DEF(sctp_asoc_free_resc_limit, SCTPCTL_ASOC_RESOURCE) +USRSCTP_SYSCTL_SET_DEF(sctp_heartbeat_interval_default, SCTPCTL_HEARTBEAT_INTERVAL) +USRSCTP_SYSCTL_SET_DEF(sctp_pmtu_raise_time_default, SCTPCTL_PMTU_RAISE_TIME) +USRSCTP_SYSCTL_SET_DEF(sctp_shutdown_guard_time_default, SCTPCTL_SHUTDOWN_GUARD_TIME) +USRSCTP_SYSCTL_SET_DEF(sctp_secret_lifetime_default, SCTPCTL_SECRET_LIFETIME) +USRSCTP_SYSCTL_SET_DEF(sctp_rto_max_default, SCTPCTL_RTO_MAX) +USRSCTP_SYSCTL_SET_DEF(sctp_rto_min_default, SCTPCTL_RTO_MIN) +USRSCTP_SYSCTL_SET_DEF(sctp_rto_initial_default, SCTPCTL_RTO_INITIAL) +USRSCTP_SYSCTL_SET_DEF(sctp_init_rto_max_default, SCTPCTL_INIT_RTO_MAX) +USRSCTP_SYSCTL_SET_DEF(sctp_valid_cookie_life_default, SCTPCTL_VALID_COOKIE_LIFE) +USRSCTP_SYSCTL_SET_DEF(sctp_init_rtx_max_default, SCTPCTL_INIT_RTX_MAX) +USRSCTP_SYSCTL_SET_DEF(sctp_assoc_rtx_max_default, SCTPCTL_ASSOC_RTX_MAX) +USRSCTP_SYSCTL_SET_DEF(sctp_path_rtx_max_default, SCTPCTL_PATH_RTX_MAX) +USRSCTP_SYSCTL_SET_DEF(sctp_add_more_threshold, SCTPCTL_ADD_MORE_ON_OUTPUT) +USRSCTP_SYSCTL_SET_DEF(sctp_nr_incoming_streams_default, SCTPCTL_INCOMING_STREAMS) +USRSCTP_SYSCTL_SET_DEF(sctp_nr_outgoing_streams_default, SCTPCTL_OUTGOING_STREAMS) +USRSCTP_SYSCTL_SET_DEF(sctp_cmt_on_off, SCTPCTL_CMT_ON_OFF) +USRSCTP_SYSCTL_SET_DEF(sctp_cmt_use_dac, SCTPCTL_CMT_USE_DAC) +USRSCTP_SYSCTL_SET_DEF(sctp_use_cwnd_based_maxburst, SCTPCTL_CWND_MAXBURST) +USRSCTP_SYSCTL_SET_DEF(sctp_nat_friendly, SCTPCTL_NAT_FRIENDLY) +USRSCTP_SYSCTL_SET_DEF(sctp_L2_abc_variable, SCTPCTL_ABC_L_VAR) +USRSCTP_SYSCTL_SET_DEF(sctp_mbuf_threshold_count, SCTPCTL_MAX_CHAINED_MBUFS) +USRSCTP_SYSCTL_SET_DEF(sctp_do_drain, SCTPCTL_DO_SCTP_DRAIN) +USRSCTP_SYSCTL_SET_DEF(sctp_hb_maxburst, SCTPCTL_HB_MAX_BURST) +USRSCTP_SYSCTL_SET_DEF(sctp_abort_if_one_2_one_hits_limit, SCTPCTL_ABORT_AT_LIMIT) +USRSCTP_SYSCTL_SET_DEF(sctp_min_residual, SCTPCTL_MIN_RESIDUAL) +USRSCTP_SYSCTL_SET_DEF(sctp_max_retran_chunk, SCTPCTL_MAX_RETRAN_CHUNK) +USRSCTP_SYSCTL_SET_DEF(sctp_logging_level, SCTPCTL_LOGGING_LEVEL) +USRSCTP_SYSCTL_SET_DEF(sctp_default_cc_module, SCTPCTL_DEFAULT_CC_MODULE) +USRSCTP_SYSCTL_SET_DEF(sctp_default_frag_interleave, SCTPCTL_DEFAULT_FRAG_INTERLEAVE) +USRSCTP_SYSCTL_SET_DEF(sctp_mobility_base, SCTPCTL_MOBILITY_BASE) +USRSCTP_SYSCTL_SET_DEF(sctp_mobility_fasthandoff, SCTPCTL_MOBILITY_FASTHANDOFF) +USRSCTP_SYSCTL_SET_DEF(sctp_inits_include_nat_friendly, SCTPCTL_NAT_FRIENDLY_INITS) +USRSCTP_SYSCTL_SET_DEF(sctp_udp_tunneling_port, SCTPCTL_UDP_TUNNELING_PORT) +USRSCTP_SYSCTL_SET_DEF(sctp_enable_sack_immediately, SCTPCTL_SACK_IMMEDIATELY_ENABLE) +USRSCTP_SYSCTL_SET_DEF(sctp_vtag_time_wait, SCTPCTL_TIME_WAIT) +USRSCTP_SYSCTL_SET_DEF(sctp_blackhole, SCTPCTL_BLACKHOLE) +USRSCTP_SYSCTL_SET_DEF(sctp_diag_info_code, SCTPCTL_DIAG_INFO_CODE) +USRSCTP_SYSCTL_SET_DEF(sctp_fr_max_burst_default, SCTPCTL_FRMAXBURST) +USRSCTP_SYSCTL_SET_DEF(sctp_path_pf_threshold, SCTPCTL_PATH_PF_THRESHOLD) +USRSCTP_SYSCTL_SET_DEF(sctp_default_ss_module, SCTPCTL_DEFAULT_SS_MODULE) +USRSCTP_SYSCTL_SET_DEF(sctp_rttvar_bw, SCTPCTL_RTTVAR_BW) +USRSCTP_SYSCTL_SET_DEF(sctp_rttvar_rtt, SCTPCTL_RTTVAR_RTT) +USRSCTP_SYSCTL_SET_DEF(sctp_rttvar_eqret, SCTPCTL_RTTVAR_EQRET) +USRSCTP_SYSCTL_SET_DEF(sctp_steady_step, SCTPCTL_RTTVAR_STEADYS) +USRSCTP_SYSCTL_SET_DEF(sctp_use_dccc_ecn, SCTPCTL_RTTVAR_DCCCECN) +USRSCTP_SYSCTL_SET_DEF(sctp_buffer_splitting, SCTPCTL_BUFFER_SPLITTING) +USRSCTP_SYSCTL_SET_DEF(sctp_initial_cwnd, SCTPCTL_INITIAL_CWND) +#ifdef SCTP_DEBUG +USRSCTP_SYSCTL_SET_DEF(sctp_debug_on, SCTPCTL_DEBUG) +#endif +#if __GNUC__ >= 5 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6) || defined(__clang__) +#pragma GCC diagnostic pop +#endif + +#define USRSCTP_SYSCTL_GET_DEF(__field) \ +uint32_t usrsctp_sysctl_get_ ## __field(void) { \ + return SCTP_BASE_SYSCTL(__field); \ +} + +USRSCTP_SYSCTL_GET_DEF(sctp_sendspace) +USRSCTP_SYSCTL_GET_DEF(sctp_recvspace) +USRSCTP_SYSCTL_GET_DEF(sctp_auto_asconf) +USRSCTP_SYSCTL_GET_DEF(sctp_multiple_asconfs) +USRSCTP_SYSCTL_GET_DEF(sctp_ecn_enable) +USRSCTP_SYSCTL_GET_DEF(sctp_pr_enable) +USRSCTP_SYSCTL_GET_DEF(sctp_auth_enable) +USRSCTP_SYSCTL_GET_DEF(sctp_asconf_enable) +USRSCTP_SYSCTL_GET_DEF(sctp_reconfig_enable) +USRSCTP_SYSCTL_GET_DEF(sctp_nrsack_enable) +USRSCTP_SYSCTL_GET_DEF(sctp_pktdrop_enable) +USRSCTP_SYSCTL_GET_DEF(sctp_no_csum_on_loopback) +USRSCTP_SYSCTL_GET_DEF(sctp_peer_chunk_oh) +USRSCTP_SYSCTL_GET_DEF(sctp_max_burst_default) +USRSCTP_SYSCTL_GET_DEF(sctp_max_chunks_on_queue) +USRSCTP_SYSCTL_GET_DEF(sctp_hashtblsize) +USRSCTP_SYSCTL_GET_DEF(sctp_pcbtblsize) +USRSCTP_SYSCTL_GET_DEF(sctp_min_split_point) +USRSCTP_SYSCTL_GET_DEF(sctp_chunkscale) +USRSCTP_SYSCTL_GET_DEF(sctp_delayed_sack_time_default) +USRSCTP_SYSCTL_GET_DEF(sctp_sack_freq_default) +USRSCTP_SYSCTL_GET_DEF(sctp_system_free_resc_limit) +USRSCTP_SYSCTL_GET_DEF(sctp_asoc_free_resc_limit) +USRSCTP_SYSCTL_GET_DEF(sctp_heartbeat_interval_default) +USRSCTP_SYSCTL_GET_DEF(sctp_pmtu_raise_time_default) +USRSCTP_SYSCTL_GET_DEF(sctp_shutdown_guard_time_default) +USRSCTP_SYSCTL_GET_DEF(sctp_secret_lifetime_default) +USRSCTP_SYSCTL_GET_DEF(sctp_rto_max_default) +USRSCTP_SYSCTL_GET_DEF(sctp_rto_min_default) +USRSCTP_SYSCTL_GET_DEF(sctp_rto_initial_default) +USRSCTP_SYSCTL_GET_DEF(sctp_init_rto_max_default) +USRSCTP_SYSCTL_GET_DEF(sctp_valid_cookie_life_default) +USRSCTP_SYSCTL_GET_DEF(sctp_init_rtx_max_default) +USRSCTP_SYSCTL_GET_DEF(sctp_assoc_rtx_max_default) +USRSCTP_SYSCTL_GET_DEF(sctp_path_rtx_max_default) +USRSCTP_SYSCTL_GET_DEF(sctp_add_more_threshold) +USRSCTP_SYSCTL_GET_DEF(sctp_nr_incoming_streams_default) +USRSCTP_SYSCTL_GET_DEF(sctp_nr_outgoing_streams_default) +USRSCTP_SYSCTL_GET_DEF(sctp_cmt_on_off) +USRSCTP_SYSCTL_GET_DEF(sctp_cmt_use_dac) +USRSCTP_SYSCTL_GET_DEF(sctp_use_cwnd_based_maxburst) +USRSCTP_SYSCTL_GET_DEF(sctp_nat_friendly) +USRSCTP_SYSCTL_GET_DEF(sctp_L2_abc_variable) +USRSCTP_SYSCTL_GET_DEF(sctp_mbuf_threshold_count) +USRSCTP_SYSCTL_GET_DEF(sctp_do_drain) +USRSCTP_SYSCTL_GET_DEF(sctp_hb_maxburst) +USRSCTP_SYSCTL_GET_DEF(sctp_abort_if_one_2_one_hits_limit) +USRSCTP_SYSCTL_GET_DEF(sctp_min_residual) +USRSCTP_SYSCTL_GET_DEF(sctp_max_retran_chunk) +USRSCTP_SYSCTL_GET_DEF(sctp_logging_level) +USRSCTP_SYSCTL_GET_DEF(sctp_default_cc_module) +USRSCTP_SYSCTL_GET_DEF(sctp_default_frag_interleave) +USRSCTP_SYSCTL_GET_DEF(sctp_mobility_base) +USRSCTP_SYSCTL_GET_DEF(sctp_mobility_fasthandoff) +USRSCTP_SYSCTL_GET_DEF(sctp_inits_include_nat_friendly) +USRSCTP_SYSCTL_GET_DEF(sctp_udp_tunneling_port) +USRSCTP_SYSCTL_GET_DEF(sctp_enable_sack_immediately) +USRSCTP_SYSCTL_GET_DEF(sctp_vtag_time_wait) +USRSCTP_SYSCTL_GET_DEF(sctp_blackhole) +USRSCTP_SYSCTL_GET_DEF(sctp_diag_info_code) +USRSCTP_SYSCTL_GET_DEF(sctp_fr_max_burst_default) +USRSCTP_SYSCTL_GET_DEF(sctp_path_pf_threshold) +USRSCTP_SYSCTL_GET_DEF(sctp_default_ss_module) +USRSCTP_SYSCTL_GET_DEF(sctp_rttvar_bw) +USRSCTP_SYSCTL_GET_DEF(sctp_rttvar_rtt) +USRSCTP_SYSCTL_GET_DEF(sctp_rttvar_eqret) +USRSCTP_SYSCTL_GET_DEF(sctp_steady_step) +USRSCTP_SYSCTL_GET_DEF(sctp_use_dccc_ecn) +USRSCTP_SYSCTL_GET_DEF(sctp_buffer_splitting) +USRSCTP_SYSCTL_GET_DEF(sctp_initial_cwnd) +#ifdef SCTP_DEBUG +USRSCTP_SYSCTL_GET_DEF(sctp_debug_on) +#endif + +void usrsctp_get_stat(struct sctpstat *stat) +{ + *stat = SCTP_BASE_STATS; +} |