dhcp-client: Add comment about time going backward.

Issue raised by Chris Eagle via Fortify.

diff --git a/lib/dhcp-client.c b/lib/dhcp-client.c
index d12ac3d4bb0b24ec4208e895ea1c2e77206ad7b0..919bc31dbfe0237d2c6eb47bc927d6afd9d26d2b 100644 (file)
--- a/lib/dhcp-client.c
+++ b/lib/dhcp-client.c
@@ -897,6 +897,10 @@ dhclient_msg_init(struct dhclient *cli, enum dhcp_msg_type type,
     memcpy(msg->chaddr, netdev_get_etheraddr(cli->netdev), ETH_ADDR_LEN);
 }
 
+/* If time goes backward this returns a large number, which makes it look like
+ * we've been in the current state a very long time.  That's probably
+ * fine for that corner case--we'll just expire our lease, etc., and try to
+ * get a new one.  */
 static unsigned int
 elapsed_in_this_state(const struct dhclient *cli)
 {