From: Tobias Brunner <tobias@strongswan.org>
Date: Wed, 28 Aug 2019 07:53:19 +0000 (+0200)
Subject: libipsec: Fix compiler warning with GCC 9
X-Git-Tag: 5.8.1rc2~5
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8cd5f33dd88b9e40a4fe37b539ecf4fae563c759;p=thirdparty%2Fstrongswan.git

libipsec: Fix compiler warning with GCC 9

The compiler complains that "taking address of packed member ... of
class or structure 'ip6_hdr' may result in an unaligned pointer value".
We don't care if the address is aligned as we explicitly use untoh16()
to convert the read value.
---

diff --git a/src/libipsec/ip_packet.c b/src/libipsec/ip_packet.c
index fee70c1954..f4f3358cc0 100644
--- a/src/libipsec/ip_packet.c
+++ b/src/libipsec/ip_packet.c
@@ -335,7 +335,7 @@ ip_packet_t *ip_packet_create(chunk_t packet)
 			}
 			ip = (struct ip6_hdr*)packet.ptr;
 			/* remove any RFC 4303 TFC extra padding */
-			packet.len = min(packet.len, 40 + untoh16(&ip->ip6_plen));
+			packet.len = min(packet.len, 40 + untoh16((void*)&ip->ip6_plen));
 			if (!parse_transport_header_v6(ip, packet, &payload, &next_header,
 										   &sport, &dport))
 			{