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kernel-pfroute: Retry route lookup without source address on failure

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The known source address might be gone resulting in an error, making
learning a new source address impossible.
This commit is contained in:
Tobias Brunner
2013-07-17 17:45:17 +02:00
parent bbd9df25a9
commit dc8b083d9f
1 changed files with 16 additions and 1 deletions
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src/libhydra/plugins/kernel_pfroute/kernel_pfroute_net.c
+16 -1
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@@ -1118,8 +1118,10 @@ static host_t *get_route(private_kernel_pfroute_net_t *this, bool nexthop,
host_t *host = NULL;
enumerator_t *enumerator;
struct sockaddr *addr;
bool failed = FALSE;
int type;
retry:
msg.hdr.rtm_msglen = sizeof(struct rt_msghdr);
for (type = 0; type < RTAX_MAX; type++)
{
@@ -1196,13 +1198,26 @@ static host_t *get_route(private_kernel_pfroute_net_t *this, bool nexthop,
}
else
{
DBG1(DBG_KNL, "PF_ROUTE lookup failed: %s", strerror(errno));
failed = TRUE;
}
/* signal completion of query to a waiting thread */
this->waiting_seq = 0;
this->condvar->signal(this->condvar);
this->mutex->unlock(this->mutex);
if (failed)
{
if (src)
{ /* the given source address might be gone, try again without */
src = NULL;
msg.hdr.rtm_seq = ++this->seq;
msg.hdr.rtm_addrs = 0;
memset(msg.buf, sizeof(msg.buf), 0);
goto retry;
}
DBG1(DBG_KNL, "PF_ROUTE lookup failed: %s", strerror(errno));
}
if (host)
{
DBG2(DBG_KNL, "using %H as %s to reach %H", host,