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pimd: Allow interfaces to be unnumbered.

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Specify the ifindex of the interface that we want
to turn on IP_MULTICAST_IF on instead of the
address.  If we pass in the address then the
fact that we have multiple interfaces with the
same ip address causes confusion in the kernel.

Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
This commit is contained in:
Donald Sharp 2016-09-01 18:49:53 -04:00
parent 5f6f65b14c
commit 21391ed8d8
1 changed files with 4 additions and 1 deletions
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5
pimd/pim_sock.c
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@ -113,6 +113,7 @@ pim_socket_bind (int fd, struct interface *ifp)
int pim_socket_mcast(int protocol, struct in_addr ifaddr, int ifindex, u_char loop)
{
struct ip_mreqn mreq;
int fd;
fd = pim_socket_raw(protocol);
@ -214,8 +215,10 @@ int pim_socket_mcast(int protocol, struct in_addr ifaddr, int ifindex, u_char lo
return PIM_SOCK_ERR_LOOP;
}
memset (&mreq, 0, sizeof (mreq));
mreq.imr_ifindex = ifindex;
if (setsockopt(fd, IPPROTO_IP, IP_MULTICAST_IF,
(void *) &ifaddr, sizeof(ifaddr))) {
(void *) &mreq, sizeof(mreq))) {
zlog_warn("Could not set Outgoing Interface Option on socket fd=%d: errno=%d: %s",
fd, errno, safe_strerror(errno));
close(fd);