From: Eugene Crosser <evgenii.cherkashin@cloud.ionos.com>
Date: Thu, 4 Apr 2019 13:00:36 +0000 (+0200)
Subject: use 'struct in6_pktinfo' from linux/ipv6.h
X-Git-Url: http://www.average.org/gitweb/?p=psmb.git;a=commitdiff_plain;h=HEAD;ds=sidebyside

use 'struct in6_pktinfo' from linux/ipv6.h

Getting the definition of the structure is system-dependent :(
For now, use Linux header unconditionally.

Signed-off-by: Eugene Crosser <evgenii.cherkashin@profitbricks.com>
---

diff --git a/src/Makefile b/src/Makefile
index c115768..adda873 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -1,4 +1,5 @@
-CFLAGS = -pthread -Wall -I../include
+# -D_GNU_SOURCE needed for `struct in6_pktinfo` to be defined in linux/ipv6.h
+CFLAGS = -pthread -Wall -I../include -D_GNU_SOURCE
 ARFLAGS = rcsv
 
 LIB = libpsmb.a
diff --git a/src/psmb_socket.c b/src/psmb_socket.c
index 41564a0..a68b1eb 100644
--- a/src/psmb_socket.c
+++ b/src/psmb_socket.c
@@ -12,11 +12,14 @@
 #include "psmb_priv.h"
 #include "hash64.h"
 
-/* #include <linux/ipv6.h> // should give us this definition */
+#include <linux/ipv6.h> /* contains definition of `struct in6_pktinfo`, */
+			/* but only if _GNU_SOURCE is defined. Arrgh!   */
+/* The structure itself *should* be like this:
 struct in6_pktinfo {
 	struct in6_addr	ipi6_addr;
 	int		ipi6_ifindex;
 };
+*/
 
 static void dummy_log(void *log_priv, int priority, const char *format, ...) {}