zdtm: add test cases on TCP_SYN_SENT

travis-ci: success for series starting with [01/21] build: install libnet-dev
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>

test/zdtm/static/Makefile

@@ -88,6 +88,7 @@ TST_NOFILE	:=				\
 		socket-tcp6-closed		\
 		socket-tcp-unconn		\
 		socket-tcp6-unconn		\
+		socket-tcp-syn-sent		\
 		sock_opts00			\
 		sock_opts01			\
 		sk-unix-unconn			\

test/zdtm/static/socket-tcp-syn-sent.c

+#include "zdtmtst.h"
+
+#ifdef ZDTM_IPV6
+#define ZDTM_FAMILY AF_INET6
+#else
+#define ZDTM_FAMILY AF_INET
+#endif
+
+const char *test_doc = "Check unconnected tcp sockets\n";
+const char *test_author = "Andrey Vagin <avagin@openvz.org";
+
+#include <stdio.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <string.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <signal.h>
+#include <netinet/tcp.h>
+#include <arpa/inet.h>
+
+static int port = 8880;
+
+union sockaddr_inet {
+	struct sockaddr addr;
+	struct sockaddr_in v4;
+	struct sockaddr_in6 v6;
+};
+
+int main(int argc, char **argv)
+{
+	int fd, fd_s, sock, sk;
+	union sockaddr_inet addr;
+	char cmd[4096];
+
+	test_init(argc, argv);
+
+	sk = socket(ZDTM_FAMILY, SOCK_STREAM, 0);
+	if (sk < 0) {
+		pr_perror("socket");
+		return 1;
+	}
+
+	if ((fd_s = tcp_init_server(ZDTM_FAMILY, &port)) < 0) {
+		pr_err("initializing server failed\n");
+		return 1;
+	}
+
+
+	if ((sock = socket(ZDTM_FAMILY, SOCK_STREAM | SOCK_NONBLOCK, IPPROTO_TCP)) < 0) {
+		pr_perror("can't create socket");
+		return -1;
+	}
+
+	/* Construct the server address structure */
+	memset(&addr, 0, sizeof(addr));
+	if (ZDTM_FAMILY == AF_INET) {
+		addr.v4.sin_family      = AF_INET;
+		inet_pton(AF_INET, "localhost", &addr.v4.sin_addr);
+	} else {
+		addr.v6.sin6_family      = AF_INET6;
+		inet_pton(AF_INET6, "localhost", &addr.v6.sin6_addr);
+	}
+	if (bind(sock, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
+		pr_perror("can't connect to server");
+		return -1;
+	}
+
+	snprintf(cmd, sizeof(cmd), "iptables -w -t filter --protocol tcp -A INPUT --dport %d -j DROP", port);
+	if (system(cmd))
+		return -1;
+
+	/* Construct the server address structure */
+	memset(&addr, 0, sizeof(addr));
+	if (ZDTM_FAMILY == AF_INET) {
+		addr.v4.sin_family      = AF_INET;
+		addr.v4.sin_port        = htons(port);
+		inet_pton(AF_INET, "localhost", &addr.v4.sin_addr);
+	} else {
+		addr.v6.sin6_family      = AF_INET6;
+		addr.v6.sin6_port        = htons(port);
+		inet_pton(AF_INET6, "localhost", &addr.v6.sin6_addr);
+	}
+
+	errno = 0;
+	if (connect(sock, (struct sockaddr *) &addr, sizeof(addr)) == 0 || errno != EINPROGRESS) {
+		pr_perror("can't connect to server");
+		return -1;
+	}
+
+	test_daemon();
+	test_waitsig();
+
+	snprintf(cmd, sizeof(cmd), "iptables -w -t filter --protocol tcp -D INPUT --dport %d -j DROP", port);
+	if (system(cmd))
+		return -1;
+
+	/*
+	 * parent is server of TCP connection
+	 */
+	fd = tcp_accept_server(fd_s);
+	if (fd < 0) {
+		pr_err("can't accept client connection\n");
+		return 1;
+	}
+	close(fd_s);
+
+	fcntl(sock, F_SETFL, 0);
+
+	char c = 5;
+	if (write(sock, &c, 1) != 1) {
+		fail("Unable to send data");
+		return 1;
+	}
+
+	c = 0;
+	if (read(fd, &c, 1) != 1 || c != 5) {
+		fail("Unable to recv data");
+		return 1;
+	}
+
+	c = 6;
+	if (write(fd, &c, 1) != 1) {
+		fail("Unable to send data");
+		return 1;
+	}
+
+	c = 0;
+	if (read(sock, &c, 1) != 1 || c != 6) {
+		fail("Unable to recv data");
+		return 1;
+	}
+
+
+	pass();
+	return 0;
+}

test/zdtm/static/socket-tcp-syn-sent.desc

+{   'deps': [   '/bin/sh',
+                '/sbin/iptables',
+                '/usr/lib64/xtables/libxt_tcp.so|/lib/xtables/libxt_tcp.so|/usr/lib/powerpc64le-linux-gnu/xtables/libxt_tcp.so|/usr/lib/x86_64-linux-gnu/xtables/libxt_tcp.so',
+                '/usr/lib64/xtables/libxt_standard.so|/lib/xtables/libxt_standard.so|/usr/lib/powerpc64le-linux-gnu/xtables/libxt_standard.so|/usr/lib/x86_64-linux-gnu/xtables/libxt_standard.so',
+	],
+	'opts': '--tcp-established',
+	'flags': 'suid nouser samens',
+	'feature' : 'tcp_half_closed'
+}