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sctp_sys_calls.c
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sctp_sys_calls.c
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/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
* Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
* Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* a) Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* b) Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the distribution.
*
* c) Neither the name of Cisco Systems, Inc. nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifdef __FreeBSD__
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#endif
#include <stdbool.h>
#include <stddef.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/errno.h>
#include <sys/syscall.h>
#include <sys/uio.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netinet/sctp_uio.h>
#include <netinet/sctp.h>
#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_RCV 16384
#ifdef SCTP_DEBUG_PRINT_ADDRESS
#include <net/if_dl.h>
#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
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 ret, 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);
#else
sd = -1;
#endif
if (sd == -1) {
return (-1);
}
ret = getsockopt(sd, IPPROTO_SCTP, SCTP_GET_ADDR_LEN, &av, &siz);
close(sd);
if (ret == 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;
int i, ret, *aa;
char *cpto;
const struct sockaddr *at;
size_t len;
/* validate the address count and list */
if ((addrs == NULL) || (addrcnt <= 0)) {
errno = EINVAL;
return (-1);
}
if ((buf = malloc(sizeof(int) + (size_t)addrcnt * sizeof(struct sockaddr_in6))) == NULL) {
errno = E2BIG;
return (-1);
}
len = sizeof(int);
at = addrs;
cpto = buf + sizeof(int);
/* validate all the addresses and get the size */
for (i = 0; i < addrcnt; i++) {
switch (at->sa_family) {
case AF_INET:
if (at->sa_len != sizeof(struct sockaddr_in)) {
free(buf);
errno = EINVAL;
return (-1);
}
memcpy(cpto, at, sizeof(struct sockaddr_in));
cpto = ((caddr_t)cpto + sizeof(struct sockaddr_in));
len += sizeof(struct sockaddr_in);
break;
case AF_INET6:
if (at->sa_len != sizeof(struct sockaddr_in6)) {
free(buf);
errno = EINVAL;
return (-1);
}
if (IN6_IS_ADDR_V4MAPPED(&((struct sockaddr_in6 *)at)->sin6_addr)) {
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, sizeof(struct sockaddr_in6));
cpto = ((caddr_t)cpto + sizeof(struct sockaddr_in6));
len += sizeof(struct sockaddr_in6);
}
break;
default:
free(buf);
errno = EINVAL;
return (-1);
}
at = (struct sockaddr *)((caddr_t)at + at->sa_len);
}
aa = (int *)buf;
*aa = addrcnt;
ret = setsockopt(sd, IPPROTO_SCTP, SCTP_CONNECT_X, (void *)buf,
(socklen_t)len);
if ((ret == 0) && (id != NULL)) {
*id = *(sctp_assoc_t *)buf;
}
free(buf);
return (ret);
}
int
sctp_bindx(int sd, struct sockaddr *addrs, int addrcnt, int flags)
{
struct sockaddr *sa;
struct sockaddr_in *sin;
struct sockaddr_in6 *sin6;
int i;
uint16_t sport;
bool fix_port;
/* 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);
}
sport = 0;
fix_port = false;
/* First pre-screen the addresses */
sa = addrs;
for (i = 0; i < addrcnt; i++) {
switch (sa->sa_family) {
case AF_INET:
if (sa->sa_len != sizeof(struct sockaddr_in)) {
errno = EINVAL;
return (-1);
}
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);
}
}
break;
case AF_INET6:
if (sa->sa_len != sizeof(struct sockaddr_in6)) {
errno = EINVAL;
return (-1);
}
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);
}
}
break;
default:
/* Invalid address family specified. */
errno = EAFNOSUPPORT;
return (-1);
}
sa = (struct sockaddr *)((caddr_t)sa + sa->sa_len);
}
sa = addrs;
for (i = 0; i < addrcnt; i++) {
/*
* Now, if there was a port mentioned, assure that the
* first address has that port to make sure it fails or
* succeeds correctly.
*/
if (fix_port) {
switch (sa->sa_family) {
case AF_INET:
((struct sockaddr_in *)sa)->sin_port = sport;
break;
case AF_INET6:
((struct sockaddr_in6 *)sa)->sin6_port = sport;
break;
}
fix_port = false;
}
if (setsockopt(sd, IPPROTO_SCTP, flags, sa, sa->sa_len) != 0) {
return (-1);
}
sa = (struct sockaddr *)((caddr_t)sa + sa->sa_len);
}
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);
}
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 (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;
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 (getsockopt(sd, 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 (getsockopt(sd, 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;
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)
{
void *fr_addr;
/* Take away the hidden association id */
fr_addr = (void *)((caddr_t)addrs - offsetof(struct sctp_getaddresses, addr));
/* Now free it */
free(fr_addr);
}
int
sctp_getladdrs(int sd, 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 (getsockopt(sd, IPPROTO_SCTP, SCTP_GET_LOCAL_ADDR_SIZE,
&size_of_addresses, &opt_len) != 0) {
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 (getsockopt(sd, 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;
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)
{
void *fr_addr;
/* Take away the hidden association id */
fr_addr = (void *)((caddr_t)addrs - offsetof(struct sctp_getaddresses, addr));
/* 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;
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;
return (syscall(SYS_sctp_generic_sendmsg, s,
data, len, to, tolen, &sinfo, 0));
#else
struct msghdr msg;
struct sctp_sndrcvinfo *sinfo;
struct iovec iov;
char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndrcvinfo))];
struct cmsghdr *cmsg;
struct sockaddr *who = NULL;
union {
struct sockaddr_in in;
struct sockaddr_in6 in6;
} addr;
if ((tolen > 0) &&
((to == NULL) || (tolen < sizeof(struct sockaddr)))) {
errno = EINVAL;
return (-1);
}
if ((to != NULL) && (tolen > 0)) {
switch (to->sa_family) {
case 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);
break;
case 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);
break;
default:
errno = EAFNOSUPPORT;
return (-1);
}
who = (struct sockaddr *)&addr;
}
iov.iov_base = (char *)data;
iov.iov_len = len;
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 = cmsgbuf;
msg.msg_controllen = CMSG_SPACE(sizeof(struct sctp_sndrcvinfo));
msg.msg_flags = 0;
cmsg = (struct cmsghdr *)cmsgbuf;
cmsg->cmsg_level = IPPROTO_SCTP;
cmsg->cmsg_type = SCTP_SNDRCV;
cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndrcvinfo));
sinfo = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
memset(sinfo, 0, sizeof(struct sctp_sndrcvinfo));
sinfo->sinfo_stream = stream_no;
sinfo->sinfo_ssn = 0;
sinfo->sinfo_flags = flags;
sinfo->sinfo_ppid = ppid;
sinfo->sinfo_context = context;
sinfo->sinfo_assoc_id = 0;
sinfo->sinfo_timetolive = timetolive;
return (sendmsg(s, &msg, 0));
#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);
if (getsockopt(sd, 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);
}
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
struct msghdr msg;
struct iovec iov;
char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndrcvinfo))];
struct cmsghdr *cmsg;
if (sinfo == NULL) {
errno = EINVAL;
return (-1);
}
iov.iov_base = (char *)data;
iov.iov_len = len;
msg.msg_name = NULL;
msg.msg_namelen = 0;
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
msg.msg_control = cmsgbuf;
msg.msg_controllen = CMSG_SPACE(sizeof(struct sctp_sndrcvinfo));
msg.msg_flags = 0;
cmsg = (struct cmsghdr *)cmsgbuf;
cmsg->cmsg_level = IPPROTO_SCTP;
cmsg->cmsg_type = SCTP_SNDRCV;
cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndrcvinfo));
memcpy(CMSG_DATA(cmsg), sinfo, sizeof(struct sctp_sndrcvinfo));
return (sendmsg(sd, &msg, flags));
#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)
{
struct sctp_sndrcvinfo __sinfo;
ssize_t ret;
int i, cnt, *aa, saved_errno;
char *buf;
int no_end_cx = 0;
size_t len, add_len;
struct sockaddr *at;
if (addrs == NULL) {
errno = EINVAL;
return (-1);
}
#ifdef SYS_sctp_generic_sendmsg
if (addrcnt == 1) {
socklen_t l;
ssize_t ret;
/*
* Quick way, we don't need to do a connectx so lets use the
* syscall directly.
*/
l = addrs->sa_len;
ret = syscall(SYS_sctp_generic_sendmsg, sd,
msg, msg_len, addrs, l, sinfo, flags);
if ((ret >= 0) && (sinfo != NULL)) {
sinfo->sinfo_assoc_id = sctp_getassocid(sd, addrs);
}
return (ret);
}
#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) {
errno = ENOMEM;
return (-1);
}
aa = (int *)buf;
*aa = cnt;
aa++;
memcpy((caddr_t)aa, addrs, (size_t)(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:
if (sinfo == NULL) {
sinfo = &__sinfo;
memset(&__sinfo, 0, sizeof(__sinfo));
}
sinfo->sinfo_assoc_id = sctp_getassocid(sd, addrs);
if (sinfo->sinfo_assoc_id == 0) {
(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_stream = 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;
iov.iov_base = dbuf;
iov.iov_len = len;
return (syscall(SYS_sctp_generic_recvmsg, s,
&iov, 1, from, fromlen, sinfo, msg_flags));
#else
ssize_t sz;
struct msghdr msg;
struct iovec iov;
char cmsgbuf[SCTP_CONTROL_VEC_SIZE_RCV];
struct cmsghdr *cmsg;
if (msg_flags == NULL) {
errno = EINVAL;
return (-1);
}
iov.iov_base = dbuf;
iov.iov_len = len;
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 = cmsgbuf;
msg.msg_controllen = sizeof(cmsgbuf);
msg.msg_flags = 0;
sz = recvmsg(s, &msg, *msg_flags);
*msg_flags = msg.msg_flags;
if (sz <= 0) {
return (sz);
}
if (sinfo) {
sinfo->sinfo_assoc_id = 0;
}
if ((msg.msg_controllen > 0) && (sinfo != NULL)) {
/*
* parse through and see if we find the sctp_sndrcvinfo (if
* the user wants it).
*/
for (cmsg = CMSG_FIRSTHDR(&msg); cmsg; cmsg = CMSG_NXTHDR(&msg, cmsg)) {
if (cmsg->cmsg_level != IPPROTO_SCTP) {
continue;
}
if (cmsg->cmsg_type == SCTP_SNDRCV) {
memcpy(sinfo, CMSG_DATA(cmsg), sizeof(struct sctp_sndrcvinfo));
break;
}
if (cmsg->cmsg_type == SCTP_EXTRCV) {
/*
* Let's hope that the user provided enough
* enough memory. At least he asked for more
* information.
*/
memcpy(sinfo, CMSG_DATA(cmsg), sizeof(struct sctp_extrcvinfo));
break;
}
}
}
return (sz);
#endif
}
ssize_t sctp_recvv(int sd,
const struct iovec *iov,
int iovlen,
struct sockaddr *from,
socklen_t *fromlen,
void *info,
socklen_t *infolen,
unsigned int *infotype,
int *flags)
{
char cmsgbuf[SCTP_CONTROL_VEC_SIZE_RCV];
struct msghdr msg;
struct cmsghdr *cmsg;
ssize_t ret;
struct sctp_rcvinfo *rcvinfo;
struct sctp_nxtinfo *nxtinfo;
if (((info != NULL) && (infolen == NULL)) ||
((info == NULL) && (infolen != NULL) && (*infolen != 0)) ||
((info != NULL) && (infotype == NULL))) {
errno = EINVAL;
return (-1);
}
if (infotype) {
*infotype = SCTP_RECVV_NOINFO;
}
msg.msg_name = from;
if (fromlen == NULL) {
msg.msg_namelen = 0;
} else {
msg.msg_namelen = *fromlen;
}
msg.msg_iov = (struct iovec *)iov;
msg.msg_iovlen = iovlen;
msg.msg_control = cmsgbuf;
msg.msg_controllen = sizeof(cmsgbuf);
msg.msg_flags = 0;
ret = recvmsg(sd, &msg, *flags);
*flags = msg.msg_flags;
if ((ret > 0) &&
(msg.msg_controllen > 0) &&
(infotype != NULL) &&
(infolen != NULL) &&
(*infolen > 0)) {
rcvinfo = NULL;
nxtinfo = NULL;
for (cmsg = CMSG_FIRSTHDR(&msg); cmsg; cmsg = CMSG_NXTHDR(&msg, cmsg)) {
if (cmsg->cmsg_level != IPPROTO_SCTP) {
continue;
}
if (cmsg->cmsg_type == SCTP_RCVINFO) {
rcvinfo = (struct sctp_rcvinfo *)CMSG_DATA(cmsg);
if (nxtinfo != NULL) {
break;
} else {