/* $KAME: sctp_sys_calls.c,v 1.9 2004/08/17 06:08:53 itojun Exp $ */ /* * Copyright (C) 2002-2007 Cisco Systems Inc, * 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. * 3. Neither the name of the project 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 PROJECT 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 PROJECT 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 __FBSDID("$FreeBSD$"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifndef IN6_IS_ADDR_V4MAPPED #define IN6_IS_ADDR_V4MAPPED(a) \ ((*(const uint32_t *)(const void *)(&(a)->s6_addr[0]) == 0) && \ (*(const uint32_t *)(const void *)(&(a)->s6_addr[4]) == 0) && \ (*(const uint32_t *)(const void *)(&(a)->s6_addr[8]) == ntohl(0x0000ffff))) #endif #define SCTP_CONTROL_VEC_SIZE_SND 8192 #define SCTP_CONTROL_VEC_SIZE_RCV 16384 #define SCTP_STACK_BUF_SIZE 2048 #define SCTP_SMALL_IOVEC_SIZE 2 #ifdef SCTP_DEBUG_PRINT_ADDRESS #define SCTP_STRING_BUF_SZ 256 static void SCTPPrintAnAddress(struct sockaddr *a) { char stringToPrint[SCTP_STRING_BUF_SZ]; u_short prt; char *srcaddr, *txt; if (a == NULL) { printf("NULL\n"); return; } if (a->sa_family == AF_INET) { srcaddr = (char *)&((struct sockaddr_in *)a)->sin_addr; txt = "IPv4 Address: "; prt = ntohs(((struct sockaddr_in *)a)->sin_port); } else if (a->sa_family == AF_INET6) { srcaddr = (char *)&((struct sockaddr_in6 *)a)->sin6_addr; prt = ntohs(((struct sockaddr_in6 *)a)->sin6_port); txt = "IPv6 Address: "; } else if (a->sa_family == AF_LINK) { int i; char tbuf[SCTP_STRING_BUF_SZ]; u_char adbuf[SCTP_STRING_BUF_SZ]; struct sockaddr_dl *dl; dl = (struct sockaddr_dl *)a; strncpy(tbuf, dl->sdl_data, dl->sdl_nlen); tbuf[dl->sdl_nlen] = 0; printf("Intf:%s (len:%d)Interface index:%d type:%x(%d) ll-len:%d ", tbuf, dl->sdl_nlen, dl->sdl_index, dl->sdl_type, dl->sdl_type, dl->sdl_alen ); memcpy(adbuf, LLADDR(dl), dl->sdl_alen); for (i = 0; i < dl->sdl_alen; i++) { printf("%2.2x", adbuf[i]); if (i < (dl->sdl_alen - 1)) printf(":"); } printf("\n"); return; } else { return; } if (inet_ntop(a->sa_family, srcaddr, stringToPrint, sizeof(stringToPrint))) { if (a->sa_family == AF_INET6) { printf("%s%s:%d scope:%d\n", txt, stringToPrint, prt, ((struct sockaddr_in6 *)a)->sin6_scope_id); } else { printf("%s%s:%d\n", txt, stringToPrint, prt); } } else { printf("%s unprintable?\n", txt); } } #endif /* SCTP_DEBUG_PRINT_ADDRESS */ static void in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) { bzero(sin, sizeof(*sin)); sin->sin_len = sizeof(struct sockaddr_in); sin->sin_family = AF_INET; sin->sin_port = sin6->sin6_port; sin->sin_addr.s_addr = sin6->sin6_addr.__u6_addr.__u6_addr32[3]; } int sctp_getaddrlen(sa_family_t family) { int error, sd; socklen_t siz; struct sctp_assoc_value av; av.assoc_value = family; siz = sizeof(av); #if defined(AF_INET) sd = socket(AF_INET, SOCK_SEQPACKET, IPPROTO_SCTP); #elif defined(AF_INET6) sd = socket(AF_INET6, SOCK_SEQPACKET, IPPROTO_SCTP); #endif if (sd == -1) { return (-1); } error = getsockopt(sd, IPPROTO_SCTP, SCTP_GET_ADDR_LEN, &av, &siz); close(sd); if (error == 0) { return ((int)av.assoc_value); } else { return (-1); } } int sctp_connectx(int sd, const struct sockaddr *addrs, int addrcnt, sctp_assoc_t * id) { 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++) { if (at->sa_family == AF_INET) { if (at->sa_len != sizeof(struct sockaddr_in)) { errno = EINVAL; return (-1); } memcpy(cpto, at, at->sa_len); cpto = ((caddr_t)cpto + at->sa_len); len += at->sa_len; } else if (at->sa_family == AF_INET6) { if (at->sa_len != sizeof(struct sockaddr_in6)) { errno = EINVAL; return (-1); } if (IN6_IS_ADDR_V4MAPPED(&((struct sockaddr_in6 *)at)->sin6_addr)) { len += sizeof(struct sockaddr_in); in6_sin6_2_sin((struct sockaddr_in *)cpto, (struct sockaddr_in6 *)at); cpto = ((caddr_t)cpto + sizeof(struct sockaddr_in)); len += sizeof(struct sockaddr_in); } else { memcpy(cpto, at, at->sa_len); cpto = ((caddr_t)cpto + at->sa_len); len += at->sa_len; } } else { errno = EINVAL; return (-1); } if (len > (sizeof(buf) - sizeof(int))) { /* Never enough memory */ errno = E2BIG; return (-1); } at = (struct sockaddr *)((caddr_t)at + at->sa_len); cnt++; } /* do we have any? */ if (cnt == 0) { errno = EINVAL; return (-1); } aa = (int *)buf; *aa = cnt; ret = setsockopt(sd, 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); } int sctp_bindx(int sd, struct sockaddr *addrs, int addrcnt, int flags) { struct sctp_getaddresses *gaddrs; struct sockaddr *sa; struct sockaddr_in *sin; struct sockaddr_in6 *sin6; int i, sz, argsz; uint16_t sport = 0; /* 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); } argsz = (sizeof(struct sockaddr_storage) + sizeof(struct sctp_getaddresses)); gaddrs = (struct sctp_getaddresses *)calloc(1, argsz); if (gaddrs == NULL) { errno = ENOMEM; return (-1); } /* First pre-screen the addresses */ sa = addrs; for (i = 0; i < addrcnt; i++) { sz = sa->sa_len; if (sa->sa_family == AF_INET) { if (sa->sa_len != sizeof(struct sockaddr_in)) goto out_error; 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) { goto out_error; } } else { /* save off the port */ sport = sin->sin_port; } } } else if (sa->sa_family == AF_INET6) { if (sa->sa_len != sizeof(struct sockaddr_in6)) goto out_error; 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) { goto out_error; } } else { /* save off the port */ sport = sin6->sin6_port; } } } else { /* invalid address family specified */ goto out_error; } sa = (struct sockaddr *)((caddr_t)sa + sz); } sa = addrs; /* * Now if there was a port mentioned, assure that the first address * has that port to make sure it fails or succeeds correctly. */ if (sport) { sin = (struct sockaddr_in *)sa; sin->sin_port = sport; } for (i = 0; i < addrcnt; i++) { sz = sa->sa_len; if (sa->sa_family == AF_INET) { if (sa->sa_len != sizeof(struct sockaddr_in)) goto out_error; } else if (sa->sa_family == AF_INET6) { if (sa->sa_len != sizeof(struct sockaddr_in6)) goto out_error; } else { /* invalid address family specified */ out_error: free(gaddrs); errno = EINVAL; return (-1); } memset(gaddrs, 0, argsz); gaddrs->sget_assoc_id = 0; memcpy(gaddrs->addr, sa, sz); if (setsockopt(sd, IPPROTO_SCTP, flags, gaddrs, (socklen_t) argsz) != 0) { free(gaddrs); return (-1); } sa = (struct sockaddr *)((caddr_t)sa + sz); } free(gaddrs); return (0); } int sctp_opt_info(int sd, sctp_assoc_t id, int opt, void *arg, socklen_t * size) { if (arg == NULL) { 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_SET_PEER_PRIMARY_ADDR: ((struct sctp_setpeerprim *)arg)->sspp_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; default: break; } return (getsockopt(sd, IPPROTO_SCTP, opt, arg, size)); } int sctp_getpaddrs(int sd, sctp_assoc_t id, struct sockaddr **raddrs) { struct sctp_getaddresses *addrs; struct sockaddr *sa; struct sockaddr *re; sctp_assoc_t asoc; caddr_t lim; socklen_t siz; int cnt; if (raddrs == NULL) { errno = EFAULT; return (-1); } asoc = id; siz = sizeof(sctp_assoc_t); if (getsockopt(sd, IPPROTO_SCTP, SCTP_GET_REMOTE_ADDR_SIZE, &asoc, &siz) != 0) { return (-1); } /* size required is returned in 'asoc' */ siz = (size_t)asoc; siz += sizeof(struct sctp_getaddresses); addrs = calloc(1, siz); if (addrs == NULL) { return (-1); } addrs->sget_assoc_id = id; /* Now lets get the array of addresses */ if (getsockopt(sd, IPPROTO_SCTP, SCTP_GET_PEER_ADDRESSES, addrs, &siz) != 0) { free(addrs); return (-1); } re = (struct sockaddr *)&addrs->addr[0]; *raddrs = re; cnt = 0; sa = (struct sockaddr *)&addrs->addr[0]; lim = (caddr_t)addrs + siz; while (((caddr_t)sa < lim) && (sa->sa_len > 0)) { sa = (struct sockaddr *)((caddr_t)sa + sa->sa_len); cnt++; } return (cnt); } void sctp_freepaddrs(struct sockaddr *addrs) { /* Take away the hidden association id */ void *fr_addr; fr_addr = (void *)((caddr_t)addrs - sizeof(sctp_assoc_t)); /* Now free it */ free(fr_addr); } int sctp_getladdrs(int sd, sctp_assoc_t id, struct sockaddr **raddrs) { struct sctp_getaddresses *addrs; struct sockaddr *re; caddr_t lim; struct sockaddr *sa; int size_of_addresses; socklen_t siz; int cnt; if (raddrs == NULL) { errno = EFAULT; return (-1); } size_of_addresses = 0; siz = sizeof(int); if (getsockopt(sd, IPPROTO_SCTP, SCTP_GET_LOCAL_ADDR_SIZE, &size_of_addresses, &siz) != 0) { errno = ENOMEM; return (-1); } if (size_of_addresses == 0) { errno = ENOTCONN; return (-1); } siz = size_of_addresses + sizeof(struct sockaddr_storage); siz += sizeof(struct sctp_getaddresses); addrs = calloc(1, siz); if (addrs == NULL) { errno = ENOMEM; return (-1); } addrs->sget_assoc_id = id; /* Now lets get the array of addresses */ if (getsockopt(sd, IPPROTO_SCTP, SCTP_GET_LOCAL_ADDRESSES, addrs, &siz) != 0) { free(addrs); errno = ENOMEM; return (-1); } re = (struct sockaddr *)&addrs->addr[0]; *raddrs = re; cnt = 0; sa = (struct sockaddr *)&addrs->addr[0]; lim = (caddr_t)addrs + siz; while (((caddr_t)sa < lim) && (sa->sa_len > 0)) { sa = (struct sockaddr *)((caddr_t)sa + sa->sa_len); cnt++; } return (cnt); } void sctp_freeladdrs(struct sockaddr *addrs) { /* Take away the hidden association id */ void *fr_addr; fr_addr = (void *)((caddr_t)addrs - sizeof(sctp_assoc_t)); /* Now free it */ free(fr_addr); } ssize_t sctp_sendmsg(int s, const void *data, size_t len, const struct sockaddr *to, socklen_t tolen, uint32_t ppid, uint32_t flags, uint16_t stream_no, uint32_t timetolive, uint32_t context) { #ifdef SYS_sctp_generic_sendmsg struct sctp_sndrcvinfo sinfo; 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; return (syscall(SYS_sctp_generic_sendmsg, s, data, len, to, tolen, &sinfo, 0)); #else ssize_t sz; struct msghdr msg; struct sctp_sndrcvinfo *s_info; struct iovec iov[SCTP_SMALL_IOVEC_SIZE]; char controlVector[SCTP_CONTROL_VEC_SIZE_RCV]; struct cmsghdr *cmsg; struct sockaddr *who = NULL; union { struct sockaddr_in in; struct sockaddr_in6 in6; } addr; /* fprintf(io, "sctp_sendmsg(sd:%d, data:%x, len:%d, to:%x, tolen:%d, ppid:%x, flags:%x str:%d ttl:%d ctx:%x\n", s, (u_int)data, (int)len, (u_int)to, (int)tolen, ppid, flags, (int)stream_no, (int)timetolive, (u_int)context); fflush(io); */ if ((tolen > 0) && ((to == NULL) || (tolen < sizeof(struct sockaddr)))) { errno = EINVAL; return -1; } if (to && (tolen > 0)) { if (to->sa_family == AF_INET) { if (tolen != sizeof(struct sockaddr_in)) { errno = EINVAL; return -1; } if ((to->sa_len > 0) && (to->sa_len != sizeof(struct sockaddr_in))) { errno = EINVAL; return -1; } memcpy(&addr, to, sizeof(struct sockaddr_in)); addr.in.sin_len = sizeof(struct sockaddr_in); } else if (to->sa_family == AF_INET6) { if (tolen != sizeof(struct sockaddr_in6)) { errno = EINVAL; return -1; } if ((to->sa_len > 0) && (to->sa_len != sizeof(struct sockaddr_in6))) { errno = EINVAL; return -1; } memcpy(&addr, to, sizeof(struct sockaddr_in6)); addr.in6.sin6_len = sizeof(struct sockaddr_in6); } else { errno = EAFNOSUPPORT; return -1; } who = (struct sockaddr *)&addr; } iov[0].iov_base = (char *)data; iov[0].iov_len = len; iov[1].iov_base = NULL; iov[1].iov_len = 0; if (who) { msg.msg_name = (caddr_t)who; msg.msg_namelen = who->sa_len; } else { msg.msg_name = (caddr_t)NULL; msg.msg_namelen = 0; } msg.msg_iov = iov; msg.msg_iovlen = 1; msg.msg_control = (caddr_t)controlVector; cmsg = (struct cmsghdr *)controlVector; cmsg->cmsg_level = IPPROTO_SCTP; cmsg->cmsg_type = SCTP_SNDRCV; cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndrcvinfo)); s_info = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg); s_info->sinfo_stream = stream_no; s_info->sinfo_ssn = 0; s_info->sinfo_flags = flags; s_info->sinfo_ppid = ppid; s_info->sinfo_context = context; s_info->sinfo_assoc_id = 0; s_info->sinfo_timetolive = timetolive; errno = 0; msg.msg_controllen = cmsg->cmsg_len; sz = sendmsg(s, &msg, 0); return (sz); #endif } sctp_assoc_t sctp_getassocid(int sd, struct sockaddr *sa) { struct sctp_paddrinfo sp; socklen_t siz; /* First get the assoc id */ siz = sizeof(sp); memset(&sp, 0, sizeof(sp)); memcpy((caddr_t)&sp.spinfo_address, sa, sa->sa_len); errno = 0; if (getsockopt(sd, IPPROTO_SCTP, SCTP_GET_PEER_ADDR_INFO, &sp, &siz) != 0) { return ((sctp_assoc_t) 0); } /* We depend on the fact that 0 can never be returned */ return (sp.spinfo_assoc_id); } ssize_t sctp_send(int sd, const void *data, size_t len, const struct sctp_sndrcvinfo *sinfo, int flags) { #ifdef SYS_sctp_generic_sendmsg struct sockaddr *to = NULL; return (syscall(SYS_sctp_generic_sendmsg, sd, data, len, to, 0, sinfo, flags)); #else ssize_t sz; struct msghdr msg; struct iovec iov[SCTP_SMALL_IOVEC_SIZE]; struct sctp_sndrcvinfo *s_info; char controlVector[SCTP_CONTROL_VEC_SIZE_SND]; struct cmsghdr *cmsg; if (sinfo == NULL) { errno = EINVAL; return (-1); } iov[0].iov_base = (char *)data; iov[0].iov_len = len; iov[1].iov_base = NULL; iov[1].iov_len = 0; msg.msg_name = 0; msg.msg_namelen = 0; msg.msg_iov = iov; msg.msg_iovlen = 1; msg.msg_control = (caddr_t)controlVector; cmsg = (struct cmsghdr *)controlVector; cmsg->cmsg_level = IPPROTO_SCTP; cmsg->cmsg_type = SCTP_SNDRCV; cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndrcvinfo)); s_info = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg); /* copy in the data */ *s_info = *sinfo; errno = 0; msg.msg_controllen = cmsg->cmsg_len; sz = sendmsg(sd, &msg, flags); return (sz); #endif } ssize_t sctp_sendx(int sd, const void *msg, size_t msg_len, struct sockaddr *addrs, int addrcnt, struct sctp_sndrcvinfo *sinfo, int flags) { ssize_t ret; int i, cnt, *aa, saved_errno; char *buf; int add_len, len, no_end_cx = 0; struct sockaddr *at; if (addrs == NULL) { errno = EINVAL; return (-1); } #ifdef SYS_sctp_generic_sendmsg if (addrcnt < SCTP_SMALL_IOVEC_SIZE) { socklen_t l; /* * Quick way, we don't need to do a connectx so lets use the * syscall directly. */ l = addrs->sa_len; return (syscall(SYS_sctp_generic_sendmsg, sd, msg, msg_len, addrs, l, sinfo, flags)); } #endif len = sizeof(int); at = addrs; cnt = 0; /* validate all the addresses and get the size */ for (i = 0; i < addrcnt; i++) { if (at->sa_family == AF_INET) { add_len = sizeof(struct sockaddr_in); } else if (at->sa_family == AF_INET6) { add_len = sizeof(struct sockaddr_in6); } else { errno = EINVAL; return (-1); } len += add_len; at = (struct sockaddr *)((caddr_t)at + add_len); cnt++; } /* do we have any? */ if (cnt == 0) { errno = EINVAL; return (-1); } buf = malloc(len); if (buf == NULL) { return (-1); } aa = (int *)buf; *aa = cnt; aa++; memcpy((caddr_t)aa, addrs, (len - sizeof(int))); ret = setsockopt(sd, IPPROTO_SCTP, SCTP_CONNECT_X_DELAYED, (void *)buf, (socklen_t) len); free(buf); if (ret != 0) { if (errno == EALREADY) { no_end_cx = 1; goto continue_send; } return (ret); } continue_send: sinfo->sinfo_assoc_id = sctp_getassocid(sd, addrs); if (sinfo->sinfo_assoc_id == 0) { printf("Huh, can't get associd? TSNH!\n"); (void)setsockopt(sd, IPPROTO_SCTP, SCTP_CONNECT_X_COMPLETE, (void *)addrs, (socklen_t) addrs->sa_len); errno = ENOENT; return (-1); } ret = sctp_send(sd, msg, msg_len, sinfo, flags); saved_errno = errno; if (no_end_cx == 0) (void)setsockopt(sd, IPPROTO_SCTP, SCTP_CONNECT_X_COMPLETE, (void *)addrs, (socklen_t) addrs->sa_len); errno = saved_errno; return (ret); } ssize_t sctp_sendmsgx(int sd, const void *msg, size_t len, struct sockaddr *addrs, int addrcnt, uint32_t ppid, uint32_t flags, uint16_t stream_no, uint32_t timetolive, uint32_t context) { struct sctp_sndrcvinfo sinfo; memset((void *)&sinfo, 0, sizeof(struct sctp_sndrcvinfo)); sinfo.sinfo_ppid = ppid; sinfo.sinfo_flags = flags; sinfo.sinfo_ssn = stream_no; sinfo.sinfo_timetolive = timetolive; sinfo.sinfo_context = context; return sctp_sendx(sd, msg, len, addrs, addrcnt, &sinfo, 0); } ssize_t sctp_recvmsg(int s, void *dbuf, size_t len, struct sockaddr *from, socklen_t * fromlen, struct sctp_sndrcvinfo *sinfo, int *msg_flags) { #ifdef SYS_sctp_generic_recvmsg struct iovec iov[SCTP_SMALL_IOVEC_SIZE]; iov[0].iov_base = dbuf; iov[0].iov_len = len; return (syscall(SYS_sctp_generic_recvmsg, s, iov, 1, from, fromlen, sinfo, msg_flags)); #else struct sctp_sndrcvinfo *s_info; ssize_t sz; int sinfo_found = 0; struct msghdr msg; struct iovec iov[SCTP_SMALL_IOVEC_SIZE]; char controlVector[SCTP_CONTROL_VEC_SIZE_RCV]; struct cmsghdr *cmsg; if (msg_flags == NULL) { errno = EINVAL; return (-1); } msg.msg_flags = 0; iov[0].iov_base = dbuf; iov[0].iov_len = len; iov[1].iov_base = NULL; iov[1].iov_len = 0; msg.msg_name = (caddr_t)from; if (fromlen == NULL) msg.msg_namelen = 0; else msg.msg_namelen = *fromlen; msg.msg_iov = iov; msg.msg_iovlen = 1; msg.msg_control = (caddr_t)controlVector; msg.msg_controllen = sizeof(controlVector); errno = 0; sz = recvmsg(s, &msg, *msg_flags); if (sz <= 0) return (sz); s_info = NULL; len = sz; *msg_flags = msg.msg_flags; if (sinfo) sinfo->sinfo_assoc_id = 0; if ((msg.msg_controllen) && sinfo) { /* * parse through and see if we find the sctp_sndrcvinfo (if * the user wants it). */ cmsg = (struct cmsghdr *)controlVector; while (cmsg) { if ((cmsg->cmsg_len == 0) || (cmsg->cmsg_len > msg.msg_controllen)) { break; } if (cmsg->cmsg_level == IPPROTO_SCTP) { if (cmsg->cmsg_type == SCTP_SNDRCV) { /* Got it */ s_info = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg); /* Copy it to the user */ if (sinfo) *sinfo = *s_info; sinfo_found = 1; break; } else if (cmsg->cmsg_type == SCTP_EXTRCV) { /* * Got it, presumably the user has * asked for this extra info, so the * structure holds more room :-D */ s_info = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg); /* Copy it to the user */ if (sinfo) { memcpy(sinfo, s_info, sizeof(struct sctp_extrcvinfo)); } sinfo_found = 1; break; } } cmsg = CMSG_NXTHDR(&msg, cmsg); } } return (sz); #endif } #if defined(HAVE_SCTP_PEELOFF_SOCKOPT) #include int sctp_peeloff(int sd, sctp_assoc_t assoc_id) { struct sctp_peeloff_opt peeloff; int error; socklen_t optlen; /* set in the socket option params */ memset(&peeloff, 0, sizeof(peeloff)); peeloff.s = sd; peeloff.assoc_id = assoc_id; optlen = sizeof(peeloff); error = getsockopt(sd, IPPROTO_SCTP, SCTP_PEELOFF, (void *)&peeloff, &optlen); if (error) { errno = error; return (-1); } else { return (peeloff.new_sd); } } #endif #if !defined(SYS_sctp_peeloff) && !defined(HAVE_SCTP_PEELOFF_SOCKOPT) int sctp_peeloff(int sd, sctp_assoc_t assoc_id) { /* NOT supported, return invalid sd */ errno = ENOTSUP; return (-1); } #endif #if defined(SYS_sctp_peeloff) && !defined(HAVE_SCTP_PEELOFF_SOCKOPT) int sctp_peeloff(int sd, sctp_assoc_t assoc_id) { return (syscall(SYS_sctp_peeloff, sd, assoc_id)); } #endif #undef SCTP_CONTROL_VEC_SIZE_SND #undef SCTP_CONTROL_VEC_SIZE_RCV #undef SCTP_STACK_BUF_SIZE #undef SCTP_SMALL_IOVEC_SIZE