From: Roy Marples <roy@marples.name>
Date: Sat, 20 Dec 2014 11:56:27 +0000 (+0000)
Subject: Attempt to define CMSG_SPACE for systems which lack it, like QNX.
X-Git-Tag: v6.7.0~36
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=84da000ec5331f14985a778fde4c1f3746660466;p=thirdparty%2Fdhcpcd.git

Attempt to define CMSG_SPACE for systems which lack it, like QNX.
---

diff --git a/ipv6.h b/ipv6.h
index 41074c72..ec4102c8 100644
--- a/ipv6.h
+++ b/ipv6.h
@@ -143,6 +143,16 @@ struct ipv6_state {
 #define IPV6_CSTATE(ifp)						       \
 	((const struct ipv6_state *)(ifp)->if_data[IF_DATA_IPV6])
 
+#ifndef ALIGNBYTES
+#define ALIGNBYTES (sizeof(int) - 1)
+#endif
+#ifndef ALIGN
+#define	ALIGN(p) (((unsigned int)(p) + ALIGNBYTES) & ~ALIGNBYTES)
+#endif
+#ifndef CMSG_SPACE
+#define	CMSG_SPACE(len)	(ALIGN(sizeof(struct cmsghdr)) + ALIGN(len))
+#endif
+
 #define IP6BUFLEN	(CMSG_SPACE(sizeof(struct in6_pktinfo)) + \
 			CMSG_SPACE(sizeof(int)))