sk: Support SO_DONTROUTE option

Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

protobuf/sk-opts.proto

@@ -13,4 +13,5 @@ message sk_opts_entry {
 	optional uint32		so_mark		= 10;
 	optional bool		so_passcred	= 11;
 	optional bool		so_passsec	= 12;
+	optional bool		so_dontroute	= 13;
 }

sockets.c

@@ -100,6 +100,11 @@ int restore_socket_opts(int sk, SkOptsEntry *soe)
 		pr_debug("\tset passsec for socket\n");
 		ret |= restore_opt(sk, SOL_SOCKET, SO_PASSSEC, &val);
 	}
+	if (soe->has_so_dontroute && soe->so_dontroute) {
+		val = 1;
+		pr_debug("\tset dontroute for socket\n");
+		ret |= restore_opt(sk, SOL_SOCKET, SO_DONTROUTE, &val);
+	}
 
 	tv.tv_sec = soe->so_snd_tmo_sec;
 	tv.tv_usec = soe->so_snd_tmo_usec;
@@ -166,6 +171,10 @@ int dump_socket_opts(int sk, SkOptsEntry *soe)
 	soe->has_so_passsec = true;
 	soe->so_passsec = val ? true : false;
 
+	ret |= dump_opt(sk, SOL_SOCKET, SO_DONTROUTE, &val);
+	soe->has_so_dontroute = true;
+	soe->so_dontroute = val ? true : false;
+
 	return ret;
 }
 

test/zdtm/live/static/sock_opts00.c

@@ -12,7 +12,7 @@ const char *test_author	= "Pavel Emelyanov <xemul@parallels.com>";
 #define TEST_PORT 59687
 #define TEST_ADDR INADDR_ANY
 
-#define NOPTS	5
+#define NOPTS	6
 
 int main(int argc, char ** argv)
 {
@@ -24,6 +24,7 @@ int main(int argc, char ** argv)
 	vname[2] = SO_MARK;
 	vname[3] = SO_PASSCRED;
 	vname[4] = SO_PASSSEC;
+	vname[5] = SO_DONTROUTE;
 
 	test_init(argc, argv);