commit 1c6e7fa96d39b51347531b306e490b2f5273cd27
author tarun.kundu <tarun.kundu@est.tech> Wed Nov 16 14:00:17 2022 -0800
committer tarun.kundu <tarun.kundu@est.tech> Wed Nov 16 14:00:17 2022 -0800
tree 9a736622a9be5be38e88ebe350edef96787359d7
parent dc8b7b4cbcdba6d6651f89f6d1cb943882c30c0c

Drop RS when Option len is 0

Change-Id: I973d472da23c601eb726236687113c14b49cde0a

src/radv.c

diff --git a/src/radv.c b/src/radv.c
index c69a43e..1a79d99 100644
--- a/src/radv.c
+++ b/src/radv.c
@@ -216,9 +216,9 @@
     lease_ping_reply(&from.sin6_addr, packet, interface); 
   else if ((packet[0] == ND_ROUTER_SOLICIT) && (hoplimit == 255))
   {
+    if (!((sz > 8) && (packet[9] == 0))) {
       inet_ntop(AF_INET6, &from.sin6_addr, daemon->addrbuff, ADDRSTRLEN);
-      if ((!((strncmp(daemon->addrbuff, "::",2)==0) && (packet[8] == ICMP6_OPT_SOURCE_MAC))) ||
-           (!(packet[9] == 0)))
+      if (!((strncmp(daemon->addrbuff, "::",2)==0) && (packet[8] == ICMP6_OPT_SOURCE_MAC)))
     {
       char *mac = "";
       struct dhcp_bridge *bridge, *alias;
@@ -283,6 +283,7 @@
   ts.tv_nsec = tms * 1000000;
   nanosleep(&ts, NULL);
     }
+   }
   }
 }