gprs: Add encoder/decoder for the Subscriber Update Protocol
This patch adds functions to encode and decode GSUP messages. This
does not include the layer 1 framing (IPA). The messages so far
supported are: send_auth_info_*, update_location_*,
location_cancellation_*.
Sponsored-by: On-Waves ehf
diff --git a/openbsc/tests/gprs/gprs_test.c b/openbsc/tests/gprs/gprs_test.c
index 1b20db1..bf7697d 100644
--- a/openbsc/tests/gprs/gprs_test.c
+++ b/openbsc/tests/gprs/gprs_test.c
@@ -5,6 +5,8 @@
#include <openbsc/gprs_llc.h>
#include <openbsc/gprs_utils.h>
+#include <openbsc/gprs_gsup_messages.h>
+
#define ASSERT_FALSE(x) if (x) { printf("Should have returned false.\n"); abort(); }
#define ASSERT_TRUE(x) if (!x) { printf("Should have returned true.\n"); abort(); }
@@ -378,11 +380,146 @@
}
}
+/* Tests for gprs_gsup_messages.c */
+
+#define TEST_IMSI_IE 0x01, 0x08, 0x21, 0x43, 0x65, 0x87, 0x09, 0x21, 0x43, 0xf5
+#define TEST_IMSI_STR "123456789012345"
+
+static void test_gsup_messages_dec_enc(void)
+{
+ int test_idx;
+ int rc;
+
+ static const uint8_t send_auth_info_req[] = {
+ 0x08,
+ TEST_IMSI_IE
+ };
+
+ static const uint8_t send_auth_info_err[] = {
+ 0x09,
+ TEST_IMSI_IE,
+ 0x02, 0x01, 0x07 /* GPRS no allowed */
+ };
+
+ static const uint8_t send_auth_info_res[] = {
+ 0x0a,
+ TEST_IMSI_IE,
+ 0x03, 0x22, /* Auth tuple */
+ 0x20, 0x10,
+ 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
+ 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10,
+ 0x21, 0x04,
+ 0x21, 0x22, 0x23, 0x24,
+ 0x22, 0x08,
+ 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38,
+ 0x03, 0x22, /* Auth tuple */
+ 0x20, 0x10,
+ 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88,
+ 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, 0x90,
+ 0x21, 0x04,
+ 0xa1, 0xa2, 0xa3, 0xa4,
+ 0x22, 0x08,
+ 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8,
+ };
+
+ static const uint8_t update_location_req[] = {
+ 0x04,
+ TEST_IMSI_IE,
+ };
+
+ static const uint8_t update_location_err[] = {
+ 0x05,
+ TEST_IMSI_IE,
+ 0x02, 0x01, 0x07 /* GPRS no allowed */
+ };
+
+ static const uint8_t update_location_res[] = {
+ 0x06,
+ TEST_IMSI_IE,
+ 0x04, 0x00, /* PDP info complete */
+ 0x05, 0x12,
+ 0x10, 0x01, 0x01,
+ 0x11, 0x02, 0xf1, 0x21, /* IPv4 */
+ 0x12, 0x09, 0x04, 't', 'e', 's', 't', 0x03, 'a', 'p', 'n',
+ 0x05, 0x11,
+ 0x10, 0x01, 0x02,
+ 0x11, 0x02, 0xf1, 0x21, /* IPv4 */
+ 0x12, 0x08, 0x03, 'f', 'o', 'o', 0x03, 'a', 'p', 'n',
+ };
+
+ static const uint8_t location_cancellation_req[] = {
+ 0x1c,
+ TEST_IMSI_IE,
+ 0x06, 0x01, 0x00,
+ };
+
+ static const uint8_t location_cancellation_err[] = {
+ 0x1d,
+ TEST_IMSI_IE,
+ 0x02, 0x01, 0x03 /* Illegal MS */
+ };
+
+ static const uint8_t location_cancellation_res[] = {
+ 0x1e,
+ TEST_IMSI_IE,
+ };
+
+ static const struct test {
+ char *name;
+ const uint8_t *data;
+ size_t data_len;
+ } test_messages[] = {
+ {"Send Authentication Info Request",
+ send_auth_info_req, sizeof(send_auth_info_req)},
+ {"Send Authentication Info Error",
+ send_auth_info_err, sizeof(send_auth_info_err)},
+ {"Send Authentication Info Result",
+ send_auth_info_res, sizeof(send_auth_info_res)},
+ {"Update Location Request",
+ update_location_req, sizeof(update_location_req)},
+ {"Update Location Error",
+ update_location_err, sizeof(update_location_err)},
+ {"Update Location Result",
+ update_location_res, sizeof(update_location_res)},
+ {"Location Cancellation Request",
+ location_cancellation_req, sizeof(location_cancellation_req)},
+ {"Location Cancellation Error",
+ location_cancellation_err, sizeof(location_cancellation_err)},
+ {"Location Cancellation Result",
+ location_cancellation_res, sizeof(location_cancellation_res)},
+ };
+
+ printf("Test GSUP message decoding/encoding\n");
+
+ for (test_idx = 0; test_idx < ARRAY_SIZE(test_messages); test_idx++) {
+ const struct test *t = &test_messages[test_idx];
+ struct gprs_gsup_message gm = {0};
+ struct msgb *msg = msgb_alloc(4096, "gsup_test");
+
+ printf(" Testing %s\n", t->name);
+
+ rc = gprs_gsup_decode(t->data, t->data_len, &gm);
+ OSMO_ASSERT(rc >= 0);
+
+ gprs_gsup_encode(msg, &gm);
+
+ fprintf(stderr, " generated message: %s\n", msgb_hexdump(msg));
+ fprintf(stderr, " original message: %s\n", osmo_hexdump(t->data, t->data_len));
+ fprintf(stderr, " IMSI: %s\n", gm.imsi);
+ OSMO_ASSERT(strcmp(gm.imsi, TEST_IMSI_STR) == 0);
+ OSMO_ASSERT(msgb_length(msg) == t->data_len);
+ OSMO_ASSERT(memcmp(msgb_data(msg), t->data, t->data_len) == 0);
+
+ msgb_free(msg);
+ }
+}
+
int main(int argc, char **argv)
{
test_8_4_2();
test_gsm_03_03_apn();
test_tlv_shift_functions();
+ test_gsup_messages_dec_enc();
printf("Done.\n");
return EXIT_SUCCESS;