From: Roy Marples <roy@marples.name>
Date: Sun, 13 Apr 2008 15:33:00 +0000 (+0000)
Subject: We should check the cookie on messages.
X-Git-Tag: v4.0.2~500
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1eda499e124e4ceb315913acd43fddf0248e4621;p=thirdparty%2Fdhcpcd.git

We should check the cookie on messages.
---

diff --git a/client.c b/client.c
index 391df175..bab77fcf 100644
--- a/client.c
+++ b/client.c
@@ -1182,6 +1182,10 @@ handle_packet(struct if_state *state, const struct options *options)
 			       &state->buffer_len, &state->buffer_pos) == -1)
 			break;
 
+		if (dhcp->cookie != htonl(MAGIC_COOKIE)) {
+			logger(LOG_DEBUG, "bogus cookie, ignoring");
+			continue;
+		}
 		if (state->xid != dhcp->xid) {
 			logger(LOG_DEBUG,
 			       "ignoring packet with xid 0x%x as"