Drop packets with bad length (too small)

2017-01-05 16:44:57 +00:00
parent 7779e61c15
commit 4988479df4
1 changed files with 3 additions and 1 deletions
--- a/src/ip.h
+++ b/src/ip.h
@@ -30,7 +30,9 @@ ip_get_common(struct ip_common *ic, const uint8_t *data, size_t size)
        ic->proto = data[9];
        ic->hdr_size = (data[0] & 0xF) << 2;
        ic->size = ((data[2] << 8) | data[3]);
-        return 0;
+        if (ic->size >= 20)
+            return 0;
+        break;
    case 6:
        ic->tc = ((data[0] & 0xF) << 4) | (data[1] >> 4);
        ic->proto = data[6];