zdtm: Add test for SOCK_PACKET sockets

This one covers the following cases:
* socket is bound to an interface
* socket isn't bound to an interface

https://github.com/xemul/criu/issues/73
travis-ci: success for series starting with [1/2] socket: Add support for SOCK_PACKET sockets
Signed-off-by: Gleb Valin <the7winds@yandex.ru>
Signed-off-by: Eugene Batalov <eabatalov89@gmail.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>

test/zdtm/static/Makefile

@@ -41,6 +41,7 @@ TST_NOFILE	:=				\
 		socket_dgram_data		\
 		packet_sock			\
 		packet_sock_mmap		\
+		packet_sock_spkt		\
 		sock_filter			\
 		msgque				\
 		inotify_system			\

test/zdtm/static/packet_sock_spkt.c

+#include "zdtmtst.h"
+
+#include <string.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <arpa/inet.h>
+#include <linux/if_ether.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+const char *test_doc = "Check bound and not bound SOCK_PACKET sockets";
+const char *test_author = "Gleb Valin <the7winds@yandex.ru>";
+
+struct ethframe {
+	struct ethhdr header;
+	char data[ETH_DATA_LEN];
+};
+
+static int do_bind(int sk)
+{
+	struct sockaddr addr = {};
+
+	addr.sa_family = AF_PACKET;
+	strcpy(addr.sa_data, "lo");
+
+	return bind(sk, &addr, sizeof(addr));
+}
+
+static int check_socket_binding(int sk, char *dev)
+{
+	struct sockaddr addr = {};
+
+	socklen_t l = sizeof(addr);
+
+	if (getsockname(sk, &addr, &l) < 0)
+		return -1;
+
+	if (addr.sa_family != AF_PACKET)
+		return -1;
+
+	if (strcmp(addr.sa_data, dev) != 0)
+		return -1;
+
+	return 0;
+}
+
+int main(int argc, char **argv)
+{
+	int sk1;
+	int sk2;
+
+	test_init(argc, argv);
+
+	sk1 = socket(AF_PACKET, SOCK_PACKET, htons(ETH_P_ALL));
+
+	if (sk1  < 0) {
+		pr_perror("Can't create socket 1");
+		return 1;
+	}
+
+	if (do_bind(sk1) < 0) {
+		pr_perror("Can't bind sosket 1");
+		return 1;
+	}
+
+	sk2 = socket(AF_PACKET, SOCK_PACKET, htons(ETH_P_ALL));
+
+	if (sk2 < 0) {
+		pr_perror("Can't create socket 2");
+		return 1;
+	}
+
+	test_daemon();
+	test_waitsig();
+
+	if (check_socket_binding(sk1, "lo") < 0) {
+		fail("Socket 1 has wrong binding");
+		return 1;
+	}
+
+	if (check_socket_binding(sk2, "") < 0) {
+		fail("Socket 2 has wrong binding");
+		return 1;
+	}
+
+	pass();
+	return 0;
+}

test/zdtm/static/packet_sock_spkt.desc

+{'flavor':'h', 'flags' : 'suid'}