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 add_len, len, no_end_cx = 0;
struct sockaddr *at;
if (addrs == NULL) {
errno = EINVAL;
return (-1);
}
#ifdef SYS_sctp_generic_sendmsg
if (addrcnt == 1) {
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:
if (sinfo == NULL) {
sinfo = &__sinfo;
memset(&__sinfo, 0, sizeof(__sinfo));
}
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_sendv(int sd,
const struct iovec *iov, int iovcnt,
struct sockaddr *addrs, int addrcnt,
void *info, socklen_t infolen, unsigned int infotype,
int flags)
{
ssize_t ret;
int i;
socklen_t addr_len;
struct msghdr msg;
in_port_t port;
struct sctp_sendv_spa *spa_info;
struct cmsghdr *cmsg;
char *cmsgbuf;
struct sockaddr *addr;
struct sockaddr_in *addr_in;
struct sockaddr_in6 *addr_in6;
sctp_assoc_t *assoc_id;
if ((addrcnt < 0) ||
(iovcnt < 0) ||
((addrs == NULL) && (addrcnt > 0)) ||
((addrs != NULL) && (addrcnt == 0)) ||
((iov == NULL) && (iovcnt > 0)) ||
((iov != NULL) && (iovcnt == 0))) {
errno = EINVAL;
return (-1);
}
cmsgbuf = malloc(CMSG_SPACE(sizeof(struct sctp_sndinfo)) +
CMSG_SPACE(sizeof(struct sctp_prinfo)) +
CMSG_SPACE(sizeof(struct sctp_authinfo)) +
(size_t)addrcnt * CMSG_SPACE(sizeof(struct in6_addr)));
if (cmsgbuf == NULL) {
errno = ENOMEM;
return (-1);
}
assoc_id = NULL;
msg.msg_control = cmsgbuf;
msg.msg_controllen = 0;
cmsg = (struct cmsghdr *)cmsgbuf;
switch (infotype) {
case SCTP_SENDV_NOINFO:
if ((infolen != 0) || (info != NULL)) {
free(cmsgbuf);
errno = EINVAL;
return (-1);
}
break;
case SCTP_SENDV_SNDINFO:
if ((info == NULL) || (infolen < sizeof(struct sctp_sndinfo))) {
free(cmsgbuf);
errno = EINVAL;
return (-1);
}
cmsg->cmsg_level = IPPROTO_SCTP;
cmsg->cmsg_type = SCTP_SNDINFO;
cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndinfo));
memcpy(CMSG_DATA(cmsg), info, sizeof(struct sctp_sndinfo));
msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndinfo));
cmsg = (struct cmsghdr *)((caddr_t)cmsg + CMSG_SPACE(sizeof(struct sctp_sndinfo)));
assoc_id = &(((struct sctp_sndinfo *)info)->snd_assoc_id);
break;
case SCTP_SENDV_PRINFO:
if ((info == NULL) || (infolen < sizeof(struct sctp_prinfo))) {
free(cmsgbuf);
errno = EINVAL;
return (-1);
}
cmsg->cmsg_level = IPPROTO_SCTP;
cmsg->cmsg_type = SCTP_PRINFO;
cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_prinfo));
memcpy(CMSG_DATA(cmsg), info, sizeof(struct sctp_prinfo));
msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_prinfo));
cmsg = (struct cmsghdr *)((caddr_t)cmsg + CMSG_SPACE(sizeof(struct sctp_prinfo)));
break;
case SCTP_SENDV_AUTHINFO:
if ((info == NULL) || (infolen < sizeof(struct sctp_authinfo))) {
free(cmsgbuf);
errno = EINVAL;
return (-1);
}
cmsg->cmsg_level = IPPROTO_SCTP;
cmsg->cmsg_type = SCTP_AUTHINFO;
cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_authinfo));
memcpy(CMSG_DATA(cmsg), info, sizeof(struct sctp_authinfo));
msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_authinfo));
cmsg = (struct cmsghdr *)((caddr_t)cmsg + CMSG_SPACE(sizeof(struct sctp_authinfo)));
break;
case SCTP_SENDV_SPA:
if ((info == NULL) || (infolen < sizeof(struct sctp_sendv_spa))) {
free(cmsgbuf);
errno = EINVAL;
return (-1);
}
spa_info = (struct sctp_sendv_spa *)info;
if (spa_info->sendv_flags & SCTP_SEND_SNDINFO_VALID) {
cmsg->cmsg_level = IPPROTO_SCTP;
cmsg->cmsg_type = SCTP_SNDINFO;
cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndinfo));
memcpy(CMSG_DATA(cmsg), &spa_info->sendv_sndinfo, sizeof(struct sctp_sndinfo));
msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndinfo));
cmsg = (struct cmsghdr *)((caddr_t)cmsg + CMSG_SPACE(sizeof(struct sctp_sndinfo)));
assoc_id = &(spa_info->sendv_sndinfo.snd_assoc_id);
}
if (spa_info->sendv_flags & SCTP_SEND_PRINFO_VALID) {
cmsg->cmsg_level = IPPROTO_SCTP;
cmsg->cmsg_type = SCTP_PRINFO;
cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_prinfo));
memcpy(CMSG_DATA(cmsg), &spa_info->sendv_prinfo, sizeof(struct sctp_prinfo));
msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_prinfo));
cmsg = (struct cmsghdr *)((caddr_t)cmsg + CMSG_SPACE(sizeof(struct sctp_prinfo)));
}
if (spa_info->sendv_flags & SCTP_SEND_AUTHINFO_VALID) {
cmsg->cmsg_level = IPPROTO_SCTP;
cmsg->cmsg_type = SCTP_AUTHINFO;
cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_authinfo));
memcpy(CMSG_DATA(cmsg), &spa_info->sendv_authinfo, sizeof(struct sctp_authinfo));
msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_authinfo));
cmsg = (struct cmsghdr *)((caddr_t)cmsg + CMSG_SPACE(sizeof(struct sctp_authinfo)));
}
break;
default:
free(cmsgbuf);
errno = EINVAL;
return (-1);
}
addr = addrs;
msg.msg_name = NULL;
msg.msg_namelen = 0;
for (i = 0; i < addrcnt; i++) {
switch (addr->sa_family) {
case AF_INET:
addr_len = (socklen_t) sizeof(struct sockaddr_in);
addr_in = (struct sockaddr_in *)addr;
if (addr_in->sin_len != addr_len) {
free(cmsgbuf);
errno = EINVAL;
return (-1);
}
if (i == 0) {
port = addr_in->sin_port;
} else {
if (port == addr_in->sin_port) {
cmsg->cmsg_level = IPPROTO_SCTP;
cmsg->cmsg_type = SCTP_DSTADDRV4;
cmsg->cmsg_len = CMSG_LEN(sizeof(struct in_addr));
memcpy(CMSG_DATA(cmsg), &addr_in->sin_addr, sizeof(struct in_addr));
msg.msg_controllen += CMSG_SPACE(sizeof(struct in_addr));
cmsg = (struct cmsghdr *)((caddr_t)cmsg + CMSG_SPACE(sizeof(struct in_addr)));
} else {
free(cmsgbuf);
errno = EINVAL;
return (-1);
}
}
break;
case AF_INET6:
addr_len = (socklen_t) sizeof(struct sockaddr_in6);
addr_in6 = (struct sockaddr_in6 *)addr;
if (addr_in6->sin6_len != addr_len) {
free(cmsgbuf);
errno = EINVAL;
return (-1);
}
if (i == 0) {
port = addr_in6->sin6_port;
} else {
if (port == addr_in6->sin6_port) {
cmsg->cmsg_level = IPPROTO_SCTP;
cmsg->cmsg_type = SCTP_DSTADDRV6;
cmsg->cmsg_len = CMSG_LEN(sizeof(struct in6_addr));
memcpy(CMSG_DATA(cmsg), &addr_in6->sin6_addr, sizeof(struct in6_addr));
msg.msg_controllen += CMSG_SPACE(sizeof(struct in6_addr));
cmsg = (struct cmsghdr *)((caddr_t)cmsg + CMSG_SPACE(sizeof(struct in6_addr)));
} else {
free(cmsgbuf);
errno = EINVAL;
return (-1);
}
}
break;
default:
free(cmsgbuf);
errno = EINVAL;
return (-1);
}
if (i == 0) {
msg.msg_name = addr;
msg.msg_namelen = addr_len;
}
addr = (struct sockaddr *)((caddr_t)addr + addr_len);
}
if (msg.msg_controllen == 0) {
msg.msg_control = NULL;
}
msg.msg_iov = (struct iovec *)iov;
msg.msg_iovlen = iovcnt;
msg.msg_flags = 0;
ret = sendmsg(sd, &msg, flags);
free(cmsgbuf);
if ((ret >= 0) && (addrs != NULL) && (assoc_id != NULL)) {
*assoc_id = sctp_getassocid(sd, addrs);
}
return (ret);
}
