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pimd: Fix crash when failure to create upstream

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When we have a *,G mroute that starts receiving any particular
S,G, we will get wholepkt callbacks due to the pimreg in the
OIL for the *,G.

So we need to do SPT switchover, but this can fail if we
do not have a path to the S( but we do to the RP!).

In this case fail gracefully.

Ticket: CM-15621
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
This commit is contained in:
Donald Sharp 2017-03-30 10:50:04 -04:00
parent 850a9f99b8
commit 2830b01863
1 changed files with 7 additions and 0 deletions
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7
pimd/pim_mroute.c
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@ -208,6 +208,13 @@ pim_mroute_msg_wholepkt (int fd, struct interface *ifp, const char *buf)
if (up && PIM_UPSTREAM_FLAG_TEST_SRC_IGMP(up->flags))
{
up = pim_upstream_add (&sg, ifp, PIM_UPSTREAM_FLAG_MASK_SRC_LHR, __PRETTY_FUNCTION__);
if (!up)
{
if (PIM_DEBUG_MROUTE)
zlog_debug ("%s: Unable to create upstream information for %s",
__PRETTY_FUNCTION__, pim_str_sg_dump (&sg));
return 0;
}
pim_upstream_keep_alive_timer_start (up, qpim_keep_alive_time);
pim_upstream_inherited_olist (up);
pim_upstream_switch(up, PIM_UPSTREAM_JOINED);