Merge pull request #8499 from miri64/gnrc_icmpv6_echo/fix/loopback

gnrc_icmpv6_echo: fix ping for loopback
RIOT-OS · Feb 5, 2018 · ab1d02b · ab1d02b
2 parents 7f0a7b1 + 12fad00
commit ab1d02b
Showing 1 changed file with 7 additions and 1 deletion.
diff --git a/sys/net/gnrc/network_layer/icmpv6/echo/gnrc_icmpv6_echo.c b/sys/net/gnrc/network_layer/icmpv6/echo/gnrc_icmpv6_echo.c
@@ -93,7 +93,13 @@ void gnrc_icmpv6_echo_req_handle(gnrc_netif_t *netif, ipv6_hdr_t *ipv6_hdr,
     pkt = hdr;
     hdr = gnrc_netif_hdr_build(NULL, 0, NULL, 0);
 
-    ((gnrc_netif_hdr_t *)hdr->data)->if_pid = netif->pid;
+    if (netif != NULL) {
+        ((gnrc_netif_hdr_t *)hdr->data)->if_pid = netif->pid;
+    }
+    else {
+        /* ipv6_hdr->dst is loopback address */
+        ((gnrc_netif_hdr_t *)hdr->data)->if_pid = KERNEL_PID_UNDEF;
+    }
 
     LL_PREPEND(pkt, hdr);