/* Send the contents of the global buffer via the non-multicast socket
*/
int /* <0 on failure */
output(enum output_type type,
struct sockaddr_in *dst, /* send to here */
struct interface *ifp,
struct rip *buf,
int size) /* this many bytes */
{
struct sockaddr_in in;
int flags;
const char *msg;
int res;
naddr tgt_mcast;
int soc;
int serrno;
in = *dst;
if (in.sin_port == 0)
in.sin_port = htons(RIP_PORT);
#ifdef _HAVE_SIN_LEN
if (in.sin_len == 0)
in.sin_len = sizeof(in);
#endif
soc = rip_sock;
flags = 0;
switch (type) {
case OUT_QUERY:
msg = "Answer Query";
if (soc < 0)
soc = ifp->int_rip_sock;
break;
case OUT_UNICAST:
msg = "Send";
if (soc < 0)
soc = ifp->int_rip_sock;
flags = MSG_DONTROUTE;
break;
case OUT_BROADCAST:
if (ifp->int_if_flags & IFF_POINTOPOINT) {
msg = "Send";
} else {
msg = "Send bcast";
}
flags = MSG_DONTROUTE;
break;
case OUT_MULTICAST:
if (ifp->int_if_flags & IFF_POINTOPOINT) {
msg = "Send pt-to-pt";
} else if (ifp->int_state & IS_DUP) {
trace_act("abort multicast output via %s"
" with duplicate address",
ifp->int_name);
return 0;
} else {
msg = "Send mcast";
if (rip_sock_mcast != ifp) {
#ifdef MCAST_PPP_BUG
/* Do not specify the primary interface
* explicitly if we have the multicast
* point-to-point kernel bug, since the
* kernel will do the wrong thing if the
* local address of a point-to-point link
* is the same as the address of an ordinary
* interface.
*/
if (ifp->int_addr == myaddr) {
tgt_mcast = 0;
} else
#endif
tgt_mcast = ifp->int_addr;
if (0 > setsockopt(rip_sock,
IPPROTO_IP, IP_MULTICAST_IF,
&tgt_mcast,
sizeof(tgt_mcast))) {
serrno = errno;
LOGERR("setsockopt(rip_sock,"
"IP_MULTICAST_IF)");
errno = serrno;
ifp = NULL;
return -1;
}
rip_sock_mcast = ifp;
}
in.sin_addr.s_addr = htonl(INADDR_RIP_GROUP);
}
break;
case NO_OUT_MULTICAST:
case NO_OUT_RIPV2:
default:
#ifdef DEBUG
abort();
#endif
return -1;
}
trace_rip(msg, "to", &in, ifp, buf, size);
res = sendto(soc, buf, size, flags,
(struct sockaddr *)&in, sizeof(in));
if (res < 0
&& (ifp == NULL || !(ifp->int_state & IS_BROKE))) {
serrno = errno;
msglog("%s sendto(%s%s%s.%d): %s", msg,
ifp != NULL ? ifp->int_name : "",
ifp != NULL ? ", " : "",
inet_ntoa(in.sin_addr),
ntohs(in.sin_port),
strerror(errno));
errno = serrno;
}
return res;
}
/* Send the contents of the global buffer via the non-multicast socket
*/
int /* <0 on failure */
output(enum output_type type,
struct sockaddr_in *dst, /* send to here */
struct interface *ifp,
struct rip *buf,
int size) /* this many bytes */
{
struct sockaddr_in osin;
int flags;
const char *msg;
int res;
int soc;
int serrno;
assert(ifp != NULL);
osin = *dst;
if (osin.sin_port == 0)
osin.sin_port = htons(RIP_PORT);
#ifdef _HAVE_SIN_LEN
if (osin.sin_len == 0)
osin.sin_len = sizeof(osin);
#endif
soc = rip_sock;
flags = 0;
switch (type) {
case OUT_QUERY:
msg = "Answer Query";
if (soc < 0)
soc = ifp->int_rip_sock;
break;
case OUT_UNICAST:
msg = "Send";
if (soc < 0)
soc = ifp->int_rip_sock;
flags = MSG_DONTROUTE;
break;
case OUT_BROADCAST:
if (ifp->int_if_flags & IFF_POINTOPOINT) {
msg = "Send";
} else {
msg = "Send bcast";
}
flags = MSG_DONTROUTE;
break;
case OUT_MULTICAST:
if ((ifp->int_if_flags & (IFF_POINTOPOINT|IFF_MULTICAST)) ==
IFF_POINTOPOINT) {
msg = "Send pt-to-pt";
} else if (ifp->int_state & IS_DUP) {
trace_act("abort multicast output via %s"
" with duplicate address",
ifp->int_name);
return 0;
} else {
msg = "Send mcast";
if (rip_sock_mcast != ifp) {
struct ip_mreqn mreqn;
memset(&mreqn, 0, sizeof(struct ip_mreqn));
mreqn.imr_ifindex = ifp->int_index;
if (0 > setsockopt(rip_sock,
IPPROTO_IP,
IP_MULTICAST_IF,
&mreqn,
sizeof(mreqn))) {
serrno = errno;
LOGERR("setsockopt(rip_sock, "
"IP_MULTICAST_IF)");
errno = serrno;
ifp = 0;
return -1;
}
rip_sock_mcast = ifp;
}
osin.sin_addr.s_addr = htonl(INADDR_RIP_GROUP);
}
break;
case NO_OUT_MULTICAST:
case NO_OUT_RIPV2:
default:
#ifdef DEBUG
abort();
#endif
return -1;
}
trace_rip(msg, "to", &osin, ifp, buf, size);
res = sendto(soc, buf, size, flags,
(struct sockaddr *)&osin, sizeof(osin));
if (res < 0
&& (ifp == 0 || !(ifp->int_state & IS_BROKE))) {
serrno = errno;
msglog("%s sendto(%s%s%s.%d): %s", msg,
ifp != 0 ? ifp->int_name : "",
ifp != 0 ? ", " : "",
inet_ntoa(osin.sin_addr),
ntohs(osin.sin_port),
strerror(errno));
errno = serrno;
}
return res;
}
