Make sure the ip header lands on a 4 byte alignment by adding 2 bytes

padding because the ethernet header in front is only 14 bytes.
Found the hard way by me while testing on sparc64.
Solution suggested by & OK deraadt

diff --git a/sbin/dhcpleased/dhcpleased.h b/sbin/dhcpleased/dhcpleased.h
index b333127..d4aa71c 100644 (file)
--- a/sbin/dhcpleased/dhcpleased.h
+++ b/sbin/dhcpleased/dhcpleased.h
@@ -1,4 +1,4 @@
-/*     $OpenBSD: dhcpleased.h,v 1.3 2021/02/27 10:21:08 florian Exp $  */
+/*     $OpenBSD: dhcpleased.h,v 1.4 2021/04/10 17:22:34 florian Exp $  */
 
 /*
  * Copyright (c) 2017, 2021 Florian Obser <florian@openbsd.org>
@@ -235,6 +235,7 @@ struct imsg_propose_rdns {
 struct imsg_dhcp {
        uint32_t                if_index;
        ssize_t                 len;
+       uint8_t                 ether_align[2];
        uint8_t                 packet[1500];
 };