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pimd: allow sending packets without pinned iface

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The upcoming Candidate-RP code needs to send PIM packets that go through
normal unicast routing, without forcing a specific output interface.
Allow passing in NULL ifp to do that.

Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
This commit is contained in:
David Lamparter 2022-07-09 18:47:43 +02:00
parent 18b82f64c9
commit cca9bc193e
1 changed files with 11 additions and 13 deletions
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16
pimd/pim_pim.c
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@ -636,18 +636,16 @@ static int pim_msg_send_frame(pim_addr src, pim_addr dst, ifindex_t ifindex,
int pim_msg_send(int fd, pim_addr src, pim_addr dst, uint8_t *pim_msg, int pim_msg_send(int fd, pim_addr src, pim_addr dst, uint8_t *pim_msg,
int pim_msg_size, struct interface *ifp) int pim_msg_size, struct interface *ifp)
{ {
struct pim_interface *pim_ifp; if (ifp) {
struct pim_interface *pim_ifp = ifp->info;
pim_ifp = ifp->info;
if (pim_ifp->pim_passive_enable) { if (pim_ifp->pim_passive_enable) {
if (PIM_DEBUG_PIM_PACKETS) if (PIM_DEBUG_PIM_PACKETS)
zlog_debug( zlog_debug("skip sending PIM message on passive interface %s",
"skip sending PIM message on passive interface %s",
ifp->name); ifp->name);
return 0; return 0;
} }
}
#if PIM_IPV == 4 #if PIM_IPV == 4
uint8_t ttl; uint8_t ttl;
@ -710,7 +708,7 @@ int pim_msg_send(int fd, pim_addr src, pim_addr dst, uint8_t *pim_msg,
if (PIM_DEBUG_PIM_PACKETS) if (PIM_DEBUG_PIM_PACKETS)
zlog_debug("%s: to %pPA on %s: msg_size=%d checksum=%x", zlog_debug("%s: to %pPA on %s: msg_size=%d checksum=%x",
__func__, &dst, ifp->name, pim_msg_size, __func__, &dst, ifp ? ifp->name : "*", pim_msg_size,
header->checksum); header->checksum);
if (PIM_DEBUG_PIM_PACKETDUMP_SEND) { if (PIM_DEBUG_PIM_PACKETDUMP_SEND) {
@ -718,7 +716,7 @@ int pim_msg_send(int fd, pim_addr src, pim_addr dst, uint8_t *pim_msg,
} }
pim_msg_send_frame(fd, (char *)buffer, sendlen, (struct sockaddr *)&to, pim_msg_send_frame(fd, (char *)buffer, sendlen, (struct sockaddr *)&to,
tolen, ifp->name); tolen, ifp ? ifp->name : "*");
return 0; return 0;
#else #else
@ -727,7 +725,7 @@ int pim_msg_send(int fd, pim_addr src, pim_addr dst, uint8_t *pim_msg,
iovector[0].iov_base = pim_msg; iovector[0].iov_base = pim_msg;
iovector[0].iov_len = pim_msg_size; iovector[0].iov_len = pim_msg_size;
pim_msg_send_frame(src, dst, ifp->ifindex, &iovector[0], fd); pim_msg_send_frame(src, dst, ifp ? ifp->ifindex : 0, &iovector[0], fd);
return 0; return 0;
#endif #endif