LWIP can generate packets with a source of 0.0.0.0, which triggers an
assertion failure in arp_table_add(). Instead of crashing, simply return
to avoid adding an invalid ARP table entry.
Signed-off-by: Nickolai Zeldovich <nicko...@csail.mit.edu>
---
slirp/arp_table.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/slirp/arp_table.c b/slirp/arp_table.c
index 5d7b8ac..3318ce9 100644
--- a/slirp/arp_table.c
+++ b/slirp/arp_table.c
@@ -38,7 +38,8 @@ void arp_table_add(Slirp *slirp, uint32_t ip_addr, uint8_t
ethaddr[ETH_ALEN])
ethaddr[3], ethaddr[4], ethaddr[5]));
/* Check 0.0.0.0/8 invalid source-only addresses */
- assert((ip_addr & htonl(~(0xf << 28))) != 0);
+ if ((ip_addr & htonl(~(0xf << 28))) == 0)
+ return;
if (ip_addr == 0xffffffff || ip_addr == broadcast_addr) {
/* Do not register broadcast addresses */
--
1.7.10.4
