[sccp] Implement parts of ITU SCCP for use in the A-Interface
include/sccp/sccp_types.h contain Q.713 and GSM definitions
include/sccp/sccp.h is the application interface resembling
the esentials of the UNIX socket interface.
src/sccp.c is the actual implementation of SCCP featuring
connection and UDT1 support.
tests/sccp/sccp.c is testing connection creation and formating
of the SCCP messages used by the A-interface. And
it contains a simple fuzzing test to test the
robustnes of the implementation.
diff --git a/openbsc/tests/sccp/sccp_test.c b/openbsc/tests/sccp/sccp_test.c
new file mode 100644
index 0000000..d3b334f
--- /dev/null
+++ b/openbsc/tests/sccp/sccp_test.c
@@ -0,0 +1,723 @@
+/*
+ * SCCP testing code
+ *
+ * (C) 2009 by Holger Hans Peter Freyther <zecke@selfish.org>
+ * (C) 2009 by on-waves.com
+ *
+ * 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 as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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 Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+
+#include <stdio.h>
+
+#include <arpa/inet.h>
+
+#include <sccp/sccp.h>
+#include <openbsc/gsm_data.h>
+#include <openbsc/debug.h>
+
+#define MIN(x, y) ((x) < (y) ? (x) : (y))
+
+/* BSC -> MSC */
+static const u_int8_t bssmap_reset[] = {
+ 0x09, 0x00, 0x03, 0x05, 0x07, 0x02, 0x42, 0xfe,
+ 0x02, 0x42, 0xfe, 0x06, 0x00, 0x04, 0x30, 0x04,
+ 0x01, 0x20,
+};
+
+/* MSC -> BSC reset ack */
+static const u_int8_t bssmap_reset_ack[] = {
+ 0x09, 0x00, 0x03, 0x07, 0x0b, 0x04, 0x43, 0x01,
+ 0x00, 0xfe, 0x04, 0x43, 0x5c, 0x00, 0xfe, 0x03,
+ 0x00, 0x01, 0x31,
+};
+
+/* MSC -> BSC paging, connection less */
+static const u_int8_t bssmap_paging[] = {
+ 0x09, 0x00, 0x03, 0x07, 0x0b, 0x04, 0x43, 0x01,
+ 0x00, 0xfe, 0x04, 0x43, 0x5c, 0x00, 0xfe, 0x10,
+ 0x00, 0x0e, 0x52, 0x08, 0x08, 0x29, 0x47, 0x10,
+ 0x02, 0x01, 0x31, 0x97, 0x61, 0x1a, 0x01, 0x06,
+};
+
+/* MSC -> BSC paging, UDT without PC */
+static const u_int8_t bssmap_udt[] = {
+ 0x09, 0x00, 0x03, 0x05, 0x07, 0x02, 0x42, 0xfe,
+ 0x02, 0x42, 0xfe, 0x10, 0x00, 0x0e, 0x52, 0x08,
+ 0x08, 0x29, 0x47, 0x10, 0x02, 0x01, 0x31, 0x97,
+ 0x61, 0x1a, 0x01, 0x06,
+};
+
+/* BSC -> MSC connection open */
+static const u_int8_t bssmap_cr[] = {
+ 0x01, 0x01, 0x02, 0x03, 0x02, 0x02, 0x04, 0x02,
+ 0x42, 0xfe, 0x0f, 0x1f, 0x00, 0x1d, 0x57, 0x05,
+ 0x08, 0x00, 0x72, 0xf4, 0x80, 0x20, 0x12, 0xc3,
+ 0x50, 0x17, 0x10, 0x05, 0x24, 0x11, 0x03, 0x33,
+ 0x19, 0xa2, 0x08, 0x29, 0x47, 0x10, 0x02, 0x01,
+ 0x31, 0x97, 0x61, 0x00
+};
+
+/* MSC -> BSC connection confirm */
+static const u_int8_t bssmap_cc[] = {
+ 0x02, 0x01, 0x02, 0x03, 0x00, 0x00, 0x03, 0x02, 0x01, 0x00,
+};
+
+/* MSC -> BSC DTAP
+ *
+ * we fake a bit and make it BSC -> MSC... so the
+ * payload does not make any sense..
+ */
+static const u_int8_t bssmap_dtap[] = {
+ 0x06, 0x00, 0x00, 0x03, 0x00, 0x01, 0x0f, 0x01, 0x00, 0x0c,
+ 0x03, 0x05, 0x5c, 0x08, 0x11, 0x81, 0x33, 0x66, 0x02, 0x13,
+ 0x45, 0xf4,
+};
+
+/* MSC -> BSC clear command */
+static const u_int8_t bssmap_clear[] = {
+ 0x06, 0x00, 0x00, 0x03, 0x00, 0x01, 0x06, 0x00, 0x04, 0x20,
+ 0x04, 0x01, 0x09,
+};
+
+/* MSC -> BSC released */
+static const u_int8_t bssmap_released[] = {
+ 0x04, 0x00, 0x00, 0x03, 0x01, 0x02, 0x03, 0x00, 0x01, 0x0f,
+ 0x02, 0x23, 0x42, 0x00,
+};
+
+/* BSC -> MSC released */
+static const u_int8_t bssmap_release_complete[] = {
+ 0x05, 0x01, 0x02, 0x03, 0x00, 0x00, 0x03
+};
+
+struct test_data {
+ int length;
+ const u_int8_t *data;
+ int payload_start;
+ int payload_length;
+ u_int8_t first_byte;
+
+ /* in case it should trigger a sccp response */
+ int write;
+ const u_int8_t *response;
+ int response_length;
+};
+
+static const struct test_data test_data[] = {
+ {
+ .length = ARRAY_SIZE(bssmap_reset),
+ .data = &bssmap_reset[0],
+ .payload_start = 12,
+ .payload_length = ARRAY_SIZE(bssmap_reset) - 12,
+ .first_byte = 0x0,
+ },
+ {
+ .length = ARRAY_SIZE(bssmap_reset_ack),
+ .data = &bssmap_reset_ack[0],
+ .payload_start = 16,
+ .payload_length = ARRAY_SIZE(bssmap_reset_ack) - 16,
+ .first_byte = 0x0,
+ },
+ {
+ .length = ARRAY_SIZE(bssmap_paging),
+ .data = &bssmap_paging[0],
+ .payload_start = 16,
+ .payload_length = ARRAY_SIZE(bssmap_paging) - 16,
+ .first_byte = 0x0,
+ },
+ {
+ .length = ARRAY_SIZE(bssmap_cr),
+ .data = &bssmap_cr[0],
+ .payload_start = 12,
+ /* 0x00 is end of optional data, subtract this byte */
+ .payload_length = 31,
+ .first_byte = 0x0,
+
+ /* the connection request should trigger a connection confirm */
+ .write = 1,
+ .response = &bssmap_cc[0],
+ .response_length= ARRAY_SIZE(bssmap_cc),
+ },
+ {
+ .length = ARRAY_SIZE(bssmap_dtap),
+ .data = &bssmap_dtap[0],
+ .payload_start = 7,
+ .payload_length = 15,
+ .first_byte = 0x01,
+ },
+ {
+ .length = ARRAY_SIZE(bssmap_clear),
+ .data = &bssmap_clear[0],
+ .payload_start = 7,
+ .payload_length = 6,
+ .first_byte = 0x00,
+ },
+ {
+ .length = ARRAY_SIZE(bssmap_released),
+ .data = &bssmap_released[0],
+ .payload_length = 2,
+ .payload_start = 11,
+ .first_byte = 0x23,
+
+ .write = 1,
+ .response = &bssmap_release_complete[0],
+ .response_length= ARRAY_SIZE(bssmap_release_complete),
+ },
+};
+
+/* we will send UDTs and verify they look like this */
+static const struct test_data send_data[] = {
+ {
+ .length = ARRAY_SIZE(bssmap_udt),
+ .data = &bssmap_udt[0],
+ .payload_start = 12,
+ .payload_length = ARRAY_SIZE(bssmap_udt) - 12,
+ .first_byte = 0x0,
+ },
+ {
+ .length = ARRAY_SIZE(bssmap_reset),
+ .data = &bssmap_reset[0],
+ .payload_start = 12,
+ .payload_length = ARRAY_SIZE(bssmap_reset) - 12,
+ .first_byte = 0x0,
+ },
+};
+
+struct connection_test {
+ /* should the connection be refused? */
+ int refuse;
+
+ int with_data;
+
+ /* on which side to close the connection? */
+ int close_side;
+ int close_cause;
+};
+
+/* sccp connection handling we want to test */
+static const struct connection_test connection_tests[] = {
+ {
+ .refuse = 1,
+ },
+ {
+ .refuse = 1,
+ .with_data = 1,
+ },
+ {
+ .refuse = 0,
+ .close_side = 0,
+ .close_cause = 5,
+ },
+ {
+ .refuse = 0,
+ .close_side = 0,
+ .close_cause = 5,
+ .with_data = 1,
+ },
+ {
+ .refuse = 0,
+ .close_side = 1,
+ .close_cause = 5,
+ },
+ {
+ .refuse = 0,
+ .close_side = 1,
+ .close_cause = 5,
+ .with_data = 1,
+ },
+};
+
+/* testing procedure:
+ * - we will use sccp_write and see what will be set in the
+ * outgoing callback
+ * - we will call sccp_system_incoming and see which calls
+ * are made. And then compare it to the ones we expect. We
+ * want the payload to arrive, or callbacks to be called.
+ * - we will use sccp_connection_socket and sccp_connection_write
+ * and verify state handling of connections
+ */
+
+static int current_test;
+
+/*
+ * test state...
+ */
+static int called = 0;
+static int matched = 0;
+static int write_called = 0;
+
+#define FAIL(x, args...) printf("FAILURE in %s:%d: " x, __FILE__, __LINE__, ## args)
+
+/*
+ * writing these packets and expecting a result
+ */
+int sccp_read_cb(struct msgb *data, unsigned len, void *context)
+{
+ u_int16_t payload_length = test_data[current_test].payload_length;
+ const u_int8_t *got, *wanted;
+ int i;
+
+ called = 1;
+
+ if (msgb_l3len(data) < len) {
+ /* this should never be reached */
+ FAIL("Something horrible happened.. invalid packet..\n");
+ exit(-1);
+ }
+
+ if (len == 0 || len != payload_length) {
+ FAIL("length mismatch: got: %d wanted: %d\n", msgb_l3len(data), payload_length);
+ return -1;
+ }
+
+ if (data->l3h[0] != test_data[current_test].first_byte) {
+ FAIL("The first bytes of l3 do not match: 0x%x 0x%x\n",
+ data->l3h[0], test_data[current_test].first_byte);
+ return -1;
+ }
+
+ got = &data->l3h[0];
+ wanted = test_data[current_test].data + test_data[current_test].payload_start;
+
+ for (i = 0; i < len; ++i) {
+ if (got[i] != wanted[i]) {
+ FAIL("Failed to compare byte. Got: 0x%x Wanted: 0x%x at %d\n",
+ got[i], wanted[i], i);
+ return -1;
+ }
+ }
+
+ matched = 1;
+ return 0;
+}
+
+int sccp_write_cb(struct msgb *data, void *ctx)
+{
+ int i = 0;
+ const u_int8_t *got, *wanted;
+
+ if (test_data[current_test].response == NULL) {
+ FAIL("Didn't expect write callback\n");
+ return -1;
+ } else if (test_data[current_test].response_length != msgb_l2len(data)) {
+ FAIL("Size does not match. Got: %d Wanted: %d\n",
+ msgb_l2len(data), test_data[current_test].response_length);
+ }
+
+ got = &data->l2h[0];
+ wanted = test_data[current_test].response;
+
+ for (i = 0; i < msgb_l2len(data); ++i) {
+ if (got[i] != wanted[i]) {
+ FAIL("Failed to compare byte. Got: 0x%x Wanted: 0x%x at %d\n",
+ got[i], wanted[i], i);
+ return -1;
+ }
+ }
+
+ write_called = 1;
+ return 0;
+}
+
+void sccp_c_read(struct sccp_connection *connection, struct msgb *msgb, unsigned int len)
+{
+ sccp_read_cb(msgb, len, connection->data_ctx);
+}
+
+void sccp_c_state(struct sccp_connection *connection, int old_state)
+{
+ if (connection->connection_state >= SCCP_CONNECTION_STATE_RELEASE_COMPLETE)
+ sccp_connection_free(connection);
+}
+
+int sccp_accept_cb(struct sccp_connection *connection, void *user_data)
+{
+ called = 1;
+ unsigned int ref = 0;
+ ref |= connection->destination_local_reference.octet1 << 24;
+ ref |= connection->destination_local_reference.octet2 << 16;
+ ref |= connection->destination_local_reference.octet3 << 8;
+ ref = ntohl(ref);
+
+ connection->data_cb = sccp_c_read;
+ connection->state_cb = sccp_c_state;
+
+ /* accept this */
+ return 0;
+}
+
+static int sccp_udt_write_cb(struct msgb *data, void *context)
+{
+ const u_int8_t *got, *wanted;
+ int i;
+
+ write_called = 1;
+
+ if (send_data[current_test].length != msgb_l2len(data)) {
+ FAIL("Size does not match. Got: %d Wanted: %d\n",
+ msgb_l2len(data), send_data[current_test].length);
+ return -1;
+ }
+
+ got = &data->l2h[0];
+ wanted = send_data[current_test].data;
+
+ for (i = 0; i < msgb_l2len(data); ++i) {
+ if (got[i] != wanted[i]) {
+ FAIL("Failed to compare byte. Got: 0x%x Wanted: 0x%x at %d\n",
+ got[i], wanted[i], i);
+ return -1;
+ }
+ }
+
+ matched = 1;
+ return 0;
+}
+
+static void test_sccp_system(void)
+{
+ sccp_system_init(sccp_write_cb, NULL);
+ sccp_set_read(&sccp_ssn_bssap, sccp_read_cb, NULL);
+ sccp_connection_set_incoming(&sccp_ssn_bssap, sccp_accept_cb, NULL);
+
+ for (current_test = 0; current_test < ARRAY_SIZE(test_data); ++current_test) {
+ unsigned int length = test_data[current_test].length;
+ struct msgb *msg = msgb_alloc_headroom(length + 2, 2, __func__);
+ msg->l2h = msgb_put(msg, length);
+ memcpy(msg->l2h, test_data[current_test].data, length);
+
+ called = matched = write_called = 0;
+ printf("Testing packet: %d\n", current_test);
+ sccp_system_incoming(msg);
+
+ if (!called || !matched || (test_data[current_test].write != write_called))
+ FAIL("current test: %d called: %d matched: %d write: %d\n",
+ current_test, called, matched, write_called);
+
+ msgb_free(msg);
+ }
+}
+
+/* test sending of udt */
+static void test_sccp_send_udt(void)
+{
+ sccp_system_init(sccp_udt_write_cb, NULL);
+ sccp_set_read(NULL, NULL, NULL);
+ sccp_connection_set_incoming(NULL, NULL, NULL);
+
+ for (current_test = 0; current_test < ARRAY_SIZE(send_data); ++current_test) {
+ const struct test_data *test = &send_data[current_test];
+
+ struct msgb *msg = msgb_alloc(test->payload_length, __func__);
+ msg->l3h = msgb_put(msg, test->payload_length);
+ memcpy(msg->l3h, test->data + test->payload_start, test->payload_length);
+
+ matched = write_called = 0;
+ printf("Testing packet: %d\n", current_test);
+ sccp_write(msg, &sccp_ssn_bssap, &sccp_ssn_bssap, 0);
+
+ if (!matched || !write_called)
+ FAIL("current test: %d matched: %d write: %d\n",
+ current_test, matched, write_called);
+
+ msgb_free(msg);
+ }
+}
+
+/* send udt from one end to another */
+static unsigned int test_value = 0x2442;
+static int sccp_udt_read(struct msgb *data, unsigned int len, void *context)
+{
+ unsigned int *val;
+
+ if (len != 4) {
+ FAIL("Wrong size: %d\n", msgb_l3len(data));
+ return -1;
+ }
+
+ val = (unsigned int*)data->l3h;
+ matched = test_value == *val;
+
+ return 0;
+}
+
+static int sccp_write_loop(struct msgb *data, void *context)
+{
+ /* send it back to us */
+ sccp_system_incoming(data);
+ return 0;
+}
+
+static void test_sccp_udt_communication(void)
+{
+ struct msgb *data;
+ unsigned int *val;
+
+ sccp_system_init(sccp_write_loop, NULL);
+ sccp_set_read(&sccp_ssn_bssap, sccp_udt_read, NULL);
+ sccp_connection_set_incoming(NULL, NULL, NULL);
+
+
+ data = msgb_alloc(4, "test data");
+ data->l3h = &data->data[0];
+ val = (unsigned int *)msgb_put(data, 4);
+ *val = test_value;
+
+ matched = 0;
+ sccp_write(data, &sccp_ssn_bssap, &sccp_ssn_bssap, 0);
+
+ if (!matched)
+ FAIL("Talking with us didn't work\n");
+
+ msgb_free(data);
+}
+
+
+/* connection testing... open, send, close */
+static const struct connection_test *current_con_test;
+static struct sccp_connection *outgoing_con;
+static struct sccp_connection *incoming_con;
+static int outgoing_data, incoming_data, incoming_state, outgoing_state;
+
+static struct msgb *test_data1, *test_data2, *test_data3;
+
+static void sccp_conn_in_state(struct sccp_connection *conn, int old_state)
+{
+ printf("\tincome: %d -> %d\n", old_state, conn->connection_state);
+ if (conn->connection_state >= SCCP_CONNECTION_STATE_RELEASE_COMPLETE) {
+ if (conn == incoming_con) {
+ sccp_connection_free(conn);
+ incoming_con = NULL;
+ }
+ }
+}
+
+static void sccp_conn_in_data(struct sccp_connection *conn, struct msgb *msg, unsigned int len)
+{
+ /* compare the data */
+ ++incoming_data;
+ printf("\tincoming data: %d\n", len);
+
+ /* compare the data */
+ if (len != 4) {
+ FAIL("Length of packet is wrong: %u %u\n", msgb_l3len(msg), len);
+ return;
+ }
+
+ if (incoming_data == 1) {
+ if (memcmp(msg->l3h, test_data1->l3h, len) != 0) {
+ FAIL("Comparing the data failed: %d\n", incoming_data);
+ incoming_state = 0;
+ printf("Got: %s\n", hexdump(msg->l3h, len));
+ printf("Wanted: %s\n", hexdump(test_data1->l3h, len));
+
+ }
+ } else if (incoming_data == 2) {
+ if (memcmp(msg->l3h, test_data2->l3h, len) != 0) {
+ FAIL("Comparing the data failed: %d\n", incoming_data);
+ incoming_state = 0;
+ printf("Got: %s\n", hexdump(msg->l3h, len));
+ printf("Wanted: %s\n", hexdump(test_data2->l3h, len));
+ }
+ }
+
+ /* sending out data */
+ if (incoming_data == 2) {
+ printf("\tReturning data3\n");
+ sccp_connection_write(conn, test_data3);
+ }
+}
+
+static int sccp_conn_accept(struct sccp_connection *conn, void *ctx)
+{
+ printf("\taccept: %p\n", conn);
+ conn->state_cb = sccp_conn_in_state;
+ conn->data_cb = sccp_conn_in_data;
+
+ if (current_con_test->refuse)
+ return -1;
+
+ incoming_con = conn;
+ return 0;
+}
+
+/* callbacks for the outgoing side */
+static void sccp_conn_out_state(struct sccp_connection *conn, int old_state)
+{
+ printf("\toutgoing: %p %d -> %d\n", conn, old_state, conn->connection_state);
+
+ if (conn->connection_state >= SCCP_CONNECTION_STATE_RELEASE_COMPLETE) {
+ if (conn == outgoing_con) {
+ sccp_connection_free(conn);
+ outgoing_con = NULL;
+ }
+ }
+}
+
+static void sccp_conn_out_data(struct sccp_connection *conn, struct msgb *msg, unsigned int len)
+{
+ ++outgoing_data;
+ printf("\toutgoing data: %p %d\n", conn, len);
+
+ if (len != 4)
+ FAIL("Length of packet is wrong: %u %u\n", msgb_l3len(msg), len);
+
+ if (outgoing_data == 1) {
+ if (memcmp(msg->l3h, test_data3->l3h, len) != 0) {
+ FAIL("Comparing the data failed\n");
+ outgoing_state = 0;
+ }
+ }
+}
+
+static void do_test_sccp_connection(const struct connection_test *test)
+{
+ int ret;
+
+ current_con_test = test;
+ outgoing_con = incoming_con = 0;
+
+ outgoing_con = sccp_connection_socket();
+ if (!outgoing_con) {
+ FAIL("Connection is NULL\n");
+ return;
+ }
+
+ outgoing_con->state_cb = sccp_conn_out_state;
+ outgoing_con->data_cb = sccp_conn_out_data;
+ outgoing_data = incoming_data = 0;
+ incoming_state = outgoing_state = 1;
+
+ /* start testing */
+ if (test->with_data) {
+ if (sccp_connection_connect(outgoing_con, &sccp_ssn_bssap, test_data1) != 0)
+ FAIL("Binding failed\n");
+ } else {
+ ++incoming_data;
+ if (sccp_connection_connect(outgoing_con, &sccp_ssn_bssap, NULL) != 0)
+ FAIL("Binding failed\n");
+ }
+
+ if (test->refuse) {
+ if (outgoing_con)
+ FAIL("Outgoing connection should have been refused.\n");
+ } else {
+ if (!incoming_con)
+ FAIL("Creating incoming didn't work.\n");
+
+ printf("\tWriting test data2\n");
+ sccp_connection_write(outgoing_con, test_data2);
+
+ /* closing connection */
+ if (test->close_side == 0)
+ ret = sccp_connection_close(outgoing_con, 0);
+ else
+ ret = sccp_connection_close(incoming_con, 0);
+
+ if (ret != 0)
+ FAIL("Closing the connection failed\n");
+ }
+
+ /* outgoing should be gone now */
+ if (outgoing_con)
+ FAIL("Outgoing connection was not properly closed\n");
+
+ if (incoming_con)
+ FAIL("Incoming connection was not propery closed.\n");
+
+ if (test->refuse == 0) {
+ if (outgoing_data != 1 || incoming_data != 2) {
+ FAIL("Data sending failed: %d/%d %d/%d\n",
+ outgoing_data, 1,
+ incoming_data, 2);
+ }
+ }
+
+ if (!incoming_state || !outgoing_state)
+ FAIL("Failure with the state transition. %d %d\n",
+ outgoing_state, incoming_state);
+}
+
+static void test_sccp_connection(void)
+{
+ sccp_system_init(sccp_write_loop, NULL);
+ sccp_set_read(NULL, NULL, NULL);
+ sccp_connection_set_incoming(&sccp_ssn_bssap, sccp_conn_accept, NULL);
+
+ test_data1 = msgb_alloc(4, "data1");
+ test_data1->l3h = msgb_put(test_data1, 4);
+ *((unsigned int*)test_data1->l3h) = 0x23421122;
+
+ test_data2 = msgb_alloc(4, "data2");
+ test_data2->l3h = msgb_put(test_data2, 4);
+ *((unsigned int*)test_data2->l3h) = 0x42232211;
+
+ test_data3 = msgb_alloc(4, "data3");
+ test_data3->l3h = msgb_put(test_data3, 4);
+ *((unsigned int*)test_data3->l3h) = 0x2323ff55;
+
+
+ for (current_test = 0; current_test < ARRAY_SIZE(connection_tests); ++current_test) {
+ printf("Testing %d refuse: %d with_data: %d\n",
+ current_test, connection_tests[current_test].refuse,
+ connection_tests[current_test].with_data);
+ do_test_sccp_connection(&connection_tests[current_test]);
+ }
+
+ msgb_free(test_data1);
+ msgb_free(test_data2);
+ msgb_free(test_data3);
+}
+
+/* invalid input */
+static void test_sccp_system_crash(void)
+{
+ printf("trying to provoke a crash with invalid input\n");
+ sccp_set_read(&sccp_ssn_bssap, sccp_read_cb, NULL);
+ sccp_connection_set_incoming(&sccp_ssn_bssap, sccp_accept_cb, NULL);
+
+ for (current_test = 0; current_test < ARRAY_SIZE(test_data); ++current_test) {
+ int original_length = test_data[current_test].length;
+ int length = original_length + 2;
+ int i;
+
+ printf("Testing packet: %d\n", current_test);
+
+ for (i = length; i >= 0; --i) {
+ unsigned int length = MIN(test_data[current_test].length, i);
+ struct msgb *msg = msgb_alloc_headroom(length + 2, 2, __func__);
+ msg->l2h = msgb_put(msg, length);
+ memcpy(msg->l2h, test_data[current_test].data, length);
+ sccp_system_incoming(msg);
+ msgb_free(msg);
+ }
+ }
+
+ printf("survived\n");
+}
+
+
+int main(int argc, char **argv)
+{
+ test_sccp_system();
+ test_sccp_send_udt();
+ test_sccp_udt_communication();
+ test_sccp_connection();
+ test_sccp_system_crash();
+ return 0;
+}