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authorJukka Rissanen <jukka.rissanen@linux.intel.com>2013-04-05 09:33:09 (GMT)
committerPatrik Flykt <patrik.flykt@linux.intel.com>2013-04-05 13:05:59 (GMT)
commit2d16b66f1992e29712de2cb3686075b2bede57d9 (patch)
tree882e7bbfff460aa04d712744a1ce5904e42a07d9 /tools
parent385694bb737157ca1b0b9dd153dde516b2ce0b7a (diff)
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tools: Add unit test for dnsproxy
Diffstat (limited to 'tools')
-rw-r--r--tools/dnsproxy-unit.c463
1 files changed, 463 insertions, 0 deletions
diff --git a/tools/dnsproxy-unit.c b/tools/dnsproxy-unit.c
new file mode 100644
index 0000000..1d0e66d
--- /dev/null
+++ b/tools/dnsproxy-unit.c
@@ -0,0 +1,463 @@
+/*
+ *
+ * Connection Manager
+ *
+ * Copyright (C) 2013 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <arpa/inet.h>
+#include <netinet/in.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netdb.h>
+#include <resolv.h>
+#include <glib.h>
+#include <fcntl.h>
+
+#if 0
+#define DEBUG
+#endif
+#ifdef DEBUG
+#include <stdio.h>
+
+#define LOG(fmt, arg...) do { \
+ fprintf(stdout, "%s:%s() " fmt "\n", \
+ __FILE__, __func__ , ## arg); \
+} while (0)
+#else
+#define LOG(fmt, arg...)
+#endif
+
+unsigned char msg[] = {
+ 0x00, 0x1c, /* len 28 */
+ 0x31, 0x82, /* tran id */
+ 0x01, 0x00, /* flags (recursion required) */
+ 0x00, 0x01, /* questions (1) */
+ 0x00, 0x00, /* answer rr */
+ 0x00, 0x00, /* authority rr */
+ 0x00, 0x00, /* additional rr */
+ 0x06, 0x6c, 0x6f, 0x6c, 0x67, 0x65, 0x30, /* lolge0, just some name */
+ 0x03, 0x63, 0x6f, 0x6d, /* com */
+ 0x00, /* null terminator */
+ 0x00, 0x01, /* type A */
+ 0x00, 0x01, /* class IN */
+};
+
+unsigned char msg2[] = {
+ 0x00, 0x1c, /* len 28 */
+ 0x31, 0x83, /* tran id */
+ 0x01, 0x00, /* flags (recursion required) */
+ 0x00, 0x01, /* questions (1) */
+ 0x00, 0x00, /* answer rr */
+ 0x00, 0x00, /* authority rr */
+ 0x00, 0x00, /* additional rr */
+ 0x06, 0x6c, 0x6f, 0x67, 0x6c, 0x67, 0x65, /* loelge */
+ 0x03, 0x63, 0x6f, 0x6d, /* com */
+ 0x00, /* null terminator */
+ 0x00, 0x01, /* type A */
+ 0x00, 0x01, /* class IN */
+
+ 0x00, 0x1c, /* len 28 */
+ 0x31, 0x84, /* tran id */
+ 0x01, 0x00, /* flags (recursion required) */
+ 0x00, 0x01, /* questions (1) */
+ 0x00, 0x00, /* answer rr */
+ 0x00, 0x00, /* authority rr */
+ 0x00, 0x00, /* additional rr */
+ 0x06, 0x6c, 0x6f, 0x67, 0x6c, 0x67, 0x65, /* loelge */
+ 0x03, 0x6e, 0x65, 0x74, /* net */
+ 0x00, /* null terminator */
+ 0x00, 0x01, /* type A */
+ 0x00, 0x01, /* class IN */
+};
+
+unsigned char msg_invalid[] = {
+ 0x00, 0x1c, /* len 28 */
+ 0x31, 0xC0, /* tran id */
+};
+
+static int create_tcp_socket(int family)
+{
+ int sk, err;
+
+ sk = socket(family, SOCK_STREAM, IPPROTO_TCP);
+ if (sk < 0) {
+ err = errno;
+ LOG("Failed to create TCP socket %d/%s", err, strerror(err));
+ return -err;
+ }
+
+ return sk;
+}
+
+static int create_udp_socket(int family)
+{
+ int sk, err;
+
+ sk = socket(family, SOCK_DGRAM, IPPROTO_UDP);
+ if (sk < 0) {
+ err = errno;
+ LOG("Failed to create UDP socket %d/%s", err, strerror(err));
+ return -err;
+ }
+
+ return sk;
+}
+
+static int connect_tcp_socket(char *server)
+{
+ int sk;
+ int err = 0;
+
+ struct addrinfo hints, *rp;
+
+ memset(&hints, 0, sizeof(hints));
+
+ hints.ai_socktype = SOCK_STREAM;
+ hints.ai_family = AF_UNSPEC;
+ hints.ai_flags = AI_NUMERICSERV | AI_NUMERICHOST;
+ getaddrinfo(server, "53", &hints, &rp);
+
+ sk = create_tcp_socket(rp->ai_family);
+ err = sk;
+
+ LOG("sk %d family %d", sk, rp->ai_family);
+
+ if (sk >= 0 && connect(sk, rp->ai_addr, rp->ai_addrlen) < 0) {
+ err = -errno;
+ fprintf(stderr, "Failed to connect to DNS server at %s "
+ "errno %d/%s\n",
+ server, -err, strerror(-err));
+ }
+
+ if (sk >= 0)
+ fcntl(sk, F_SETFL, O_NONBLOCK);
+
+ freeaddrinfo(rp);
+
+ return err;
+}
+
+static int send_msg(int sk, unsigned char *msg, unsigned int len,
+ int sleep_between)
+{
+ unsigned int i;
+ int err;
+
+ for (i = 0; i < len; i++) {
+ err = write(sk, &msg[i], 1);
+ if (err < 0) {
+ err = -errno;
+ LOG("write failed errno %d/%s", -err, strerror(-err));
+ }
+
+ g_assert_cmpint(err, >=, 0);
+ if (err < 0)
+ return err;
+
+ if (sleep_between)
+ usleep(1000);
+ }
+
+ return 0;
+}
+
+static int connect_udp_socket(char *server, struct sockaddr *sa,
+ socklen_t *sa_len)
+{
+ int sk;
+ int err = 0;
+
+ struct addrinfo hints, *rp;
+
+ memset(&hints, 0, sizeof(hints));
+
+ hints.ai_socktype = SOCK_DGRAM;
+ hints.ai_family = AF_UNSPEC;
+ hints.ai_flags = AI_NUMERICSERV | AI_NUMERICHOST;
+ getaddrinfo(server, "53", &hints, &rp);
+
+ sk = create_udp_socket(rp->ai_family);
+ err = sk;
+
+ LOG("sk %d family %d", sk, rp->ai_family);
+
+ if (sk < 0) {
+ err = -errno;
+ fprintf(stderr, "Failed to connect to DNS server at %s "
+ "errno %d/%s\n",
+ server, -err, strerror(-err));
+ } else {
+ memcpy(sa, rp->ai_addr, *sa_len);
+ *sa_len = rp->ai_addrlen;
+ }
+
+ freeaddrinfo(rp);
+
+ return err;
+}
+
+static int sendto_msg(int sk, struct sockaddr *sa, socklen_t salen,
+ unsigned char *msg, unsigned int len)
+{
+ int err;
+
+ err = sendto(sk, msg, len, MSG_NOSIGNAL, sa, salen);
+ if (err < 0) {
+ err = -errno;
+ LOG("sendto failed errno %d/%s", -err, strerror(-err));
+ }
+
+ g_assert_cmpint(err, >=, 0);
+ if (err < 0)
+ return err;
+
+ return 0;
+}
+
+static unsigned short get_id()
+{
+ return random();
+}
+
+static void change_msg(unsigned char *msg, unsigned int tranid,
+ unsigned int host_loc, unsigned char host_count)
+{
+ unsigned short id = get_id();
+
+ msg[tranid] = id >> 8;
+ msg[tranid+1] = id;
+ msg[host_loc] = host_count;
+}
+
+static void change_msg2(unsigned char *msg, unsigned char host_count)
+{
+ change_msg(msg, 2, 20, host_count);
+ change_msg(msg, 32, 50, host_count+1);
+}
+
+static int receive_message(int sk, int timeout, int expected, int *server_closed)
+{
+ int ret, received = 0;
+ unsigned char buf[512];
+
+ while (timeout > 0) {
+ ret = read(sk, buf, sizeof(buf));
+ if (ret > 0) {
+ LOG("received %d bytes from server %d", ret, sk);
+ received += ret;
+ if (received >= expected)
+ break;
+ } else if (ret == 0) {
+ LOG("server %d closed socket", sk);
+ if (server_closed)
+ *server_closed = 1;
+ break;
+ } else {
+ if (errno != EAGAIN && errno != EWOULDBLOCK)
+ break;
+ }
+
+ sleep(1);
+ timeout--;
+ }
+
+ return received;
+}
+
+static int receive_from_message(int sk, struct sockaddr *sa, socklen_t len,
+ int timeout, int expected)
+{
+ int ret, received = 0;
+ unsigned char buf[512];
+
+ fcntl(sk, F_SETFL, O_NONBLOCK);
+
+ while (timeout > 0) {
+ ret = recvfrom(sk, buf, sizeof(buf), 0, sa, &len);
+ if (ret > 0) {
+ LOG("received %d bytes from server %d", ret, sk);
+ received += ret;
+ if (received >= expected)
+ break;
+ } else if (ret < 0) {
+ if (errno != EAGAIN && errno != EWOULDBLOCK)
+ break;
+ }
+
+ sleep(1);
+ timeout--;
+ }
+
+ return received;
+}
+
+static void test_ipv4_udp_msg(void)
+{
+ int sk, received = 0;
+ struct sockaddr_in sa;
+ socklen_t len = sizeof(sa);
+
+ sk = connect_udp_socket("127.0.0.1", (struct sockaddr *)&sa, &len);
+ g_assert_cmpint(sk, >=, 0);
+ change_msg(msg, 2, 20, '1');
+ sendto_msg(sk, (struct sockaddr *)&sa, len, msg, sizeof(msg));
+ received = receive_from_message(sk, (struct sockaddr *)&sa, len,
+ 10, sizeof(msg));
+ close(sk);
+
+ g_assert_cmpint(received, >=, sizeof(msg));
+}
+
+static void test_ipv6_udp_msg(void)
+{
+ int sk, received = 0;
+ struct sockaddr_in6 sa;
+ socklen_t len = sizeof(sa);
+
+ sk = connect_udp_socket("::1", (struct sockaddr *)&sa, &len);
+ g_assert_cmpint(sk, >=, 0);
+ change_msg(msg, 2, 20, '1');
+ sendto_msg(sk, (struct sockaddr *)&sa, len, msg, sizeof(msg));
+ received = receive_from_message(sk, (struct sockaddr *)&sa, len,
+ 10, sizeof(msg));
+ close(sk);
+
+ g_assert_cmpint(received, >=, sizeof(msg));
+}
+
+static void test_partial_ipv4_tcp_msg(void)
+{
+ int sk, received = 0;
+
+ sk = connect_tcp_socket("127.0.0.1");
+ g_assert_cmpint(sk, >=, 0);
+ change_msg(msg, 2, 20, '1');
+ send_msg(sk, msg, sizeof(msg), 1);
+ received = receive_message(sk, 10, sizeof(msg), NULL);
+ close(sk);
+
+ g_assert_cmpint(received, >=, sizeof(msg));
+}
+
+static void test_partial_ipv6_tcp_msg(void)
+{
+ int sk, received = 0;
+
+ sk = connect_tcp_socket("::1");
+ g_assert_cmpint(sk, >=, 0);
+ change_msg(msg, 2, 20, '2');
+ send_msg(sk, msg, sizeof(msg), 1);
+ received = receive_message(sk, 10, sizeof(msg), NULL);
+ close(sk);
+
+ g_assert_cmpint(received, >=, sizeof(msg));
+}
+
+static void test_multiple_ipv4_tcp_msg(void)
+{
+ int sk, received = 0, server_closed = 0;
+
+ sk = connect_tcp_socket("127.0.0.1");
+ g_assert_cmpint(sk, >=, 0);
+ change_msg2(msg2, '1');
+ send_msg(sk, msg2, sizeof(msg2), 0);
+ received = receive_message(sk, 35, sizeof(msg2), &server_closed);
+ close(sk);
+
+ /* If the final DNS server refuses to serve us, then do not consider
+ * it an error. This happens very often with unbound.
+ */
+ if (server_closed == 0)
+ g_assert_cmpint(received, >=, sizeof(msg2));
+}
+
+static void test_multiple_ipv6_tcp_msg(void)
+{
+ int sk, received = 0, server_closed = 0;
+
+ sk = connect_tcp_socket("::1");
+ g_assert_cmpint(sk, >=, 0);
+ change_msg2(msg2, '2');
+ send_msg(sk, msg2, sizeof(msg2), 0);
+ received = receive_message(sk, 35, sizeof(msg2), &server_closed);
+ close(sk);
+
+ if (server_closed == 0)
+ g_assert_cmpint(received, >=, sizeof(msg2));
+}
+
+static void test_failure_tcp_msg(void)
+{
+ int sk, received = 0;
+
+ sk = connect_tcp_socket("127.0.0.1");
+ g_assert_cmpint(sk, >=, 0);
+ send_msg(sk, msg_invalid, sizeof(msg_invalid), 0);
+ received = receive_message(sk, 10, 0, NULL);
+ close(sk);
+
+ g_assert_cmpint(received, ==, 0);
+}
+
+int main(int argc, char *argv[])
+{
+ g_test_init(&argc, &argv, NULL);
+
+ g_test_add_func("/dnsproxy/ipv4 udp msg",
+ test_ipv4_udp_msg);
+
+ g_test_add_func("/dnsproxy/ipv6 udp msg",
+ test_ipv6_udp_msg);
+
+ g_test_add_func("/dnsproxy/failure tcp msg ",
+ test_failure_tcp_msg);
+
+ g_test_add_func("/dnsproxy/partial ipv4 tcp msg",
+ test_partial_ipv4_tcp_msg);
+
+ g_test_add_func("/dnsproxy/partial ipv6 tcp msg",
+ test_partial_ipv6_tcp_msg);
+
+ g_test_add_func("/dnsproxy/partial ipv4 tcp msg from cache",
+ test_partial_ipv4_tcp_msg);
+
+ g_test_add_func("/dnsproxy/partial ipv6 tcp msg from cache",
+ test_partial_ipv6_tcp_msg);
+
+ g_test_add_func("/dnsproxy/multiple ipv4 tcp msg",
+ test_multiple_ipv4_tcp_msg);
+
+ g_test_add_func("/dnsproxy/multiple ipv6 tcp msg",
+ test_multiple_ipv6_tcp_msg);
+
+ g_test_add_func("/dnsproxy/multiple ipv4 tcp msg from cache",
+ test_multiple_ipv4_tcp_msg);
+
+ g_test_add_func("/dnsproxy/multiple ipv6 tcp msg from cache",
+ test_multiple_ipv6_tcp_msg);
+
+ return g_test_run();
+}