diff options
Diffstat (limited to 'sbin/routed/input.c')
| -rw-r--r-- | sbin/routed/input.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/sbin/routed/input.c b/sbin/routed/input.c index 901c4f3..db35ef3 100644 --- a/sbin/routed/input.c +++ b/sbin/routed/input.c @@ -160,6 +160,12 @@ input(struct sockaddr_in *from, /* received from this IP address */ trace_rip("Recv", "from", from, sifp, rip, cc); + if (sifp == 0) { + trace_pkt(" discard a request from an indirect router" + " (possibly an attack)"); + return; + } + if (rip->rip_vers == 0) { msglim(&bad_router, FROM_NADDR, "RIP version 0, cmd %d, packet received from %s", |
