/* * (C) 2010 by Holger Hans Peter Freyther * (C) 2010 by On-Waves * 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 #include #include #include #include #include #include static const uint8_t ussd_request[] = { 0x0b, 0x7b, 0x1c, 0x15, 0xa1, 0x13, 0x02, 0x01, 0x03, 0x02, 0x01, 0x3b, 0x30, 0x0b, 0x04, 0x01, 0x0f, 0x04, 0x06, 0x2a, 0xd5, 0x4c, 0x16, 0x1b, 0x01, 0x7f, 0x01, 0x00 }; static const uint8_t ussd_facility[] = { 0x1b, 0x3a, 0x12, 0xa2, 0x10, 0x02, 0x01, 0x01, 0x30, 0x0b, 0x02, 0x01, 0x3c, 0x30, 0x06, 0x04, 0x01, 0x0f, 0x04, 0x01, 0x32 }; static const uint8_t ussd_release[] = { 0x8b, 0x2a, 0x1c, 0x08, 0xa3, 0x06, 0x02, 0x01, 0x05, 0x02, 0x01, 0x24 }; static const uint8_t interrogate_ss[] = { 0x0b, 0x7b, 0x1c, 0x0d, 0xa1, 0x0b, 0x02, 0x01, 0x03, 0x02, 0x01, 0x0e, 0x30, 0x03, 0x04, 0x01, 0x21, 0x7f, 0x01, 0x00 }; static int parse_ussd(const uint8_t *_data, int len) { uint8_t *data; int rc; struct ss_request req; struct gsm48_hdr *hdr; data = malloc(len); memcpy(data, _data, len); hdr = (struct gsm48_hdr *) &data[0]; rc = gsm0480_decode_ss_request(hdr, len, &req); free(data); return rc; } static int parse_mangle_ussd(const uint8_t *_data, int len) { uint8_t *data; int rc; struct ss_request req; struct gsm48_hdr *hdr; data = malloc(len); memcpy(data, _data, len); hdr = (struct gsm48_hdr *) &data[0]; hdr->data[1] = len - sizeof(*hdr) - 2; rc = gsm0480_decode_ss_request(hdr, len, &req); free(data); return rc; } struct log_info info = {}; static void test_7bit_ussd(const char *text, const char *encoded_hex, const char *appended_after_decode) { uint8_t coded[256]; char decoded[256]; int octets_written; int buffer_size; int nchars; printf("original = %s\n", osmo_hexdump((uint8_t *)text, strlen(text))); gsm_7bit_encode_n_ussd(coded, sizeof(coded), text, &octets_written); printf("encoded = %s\n", osmo_hexdump(coded, octets_written)); OSMO_ASSERT(strcmp(encoded_hex, osmo_hexdump_nospc(coded, octets_written)) == 0); gsm_7bit_decode_n_ussd(decoded, sizeof(decoded), coded, octets_written * 8 / 7); printf("decoded = %s\n\n", osmo_hexdump((uint8_t *)decoded, strlen(decoded))); OSMO_ASSERT(strncmp(text, decoded, strlen(text)) == 0); OSMO_ASSERT(strcmp(appended_after_decode, decoded + strlen(text)) == 0); /* check buffer limiting */ memset(decoded, 0xaa, sizeof(decoded)); for (buffer_size = 1; buffer_size < sizeof(decoded) - 1; ++buffer_size) { nchars = gsm_7bit_decode_n_ussd(decoded, buffer_size, coded, octets_written * 8 / 7); OSMO_ASSERT(nchars <= buffer_size); OSMO_ASSERT(decoded[buffer_size] == (char)0xaa); OSMO_ASSERT(decoded[nchars] == '\0'); } memset(coded, 0xaa, sizeof(coded)); for (buffer_size = 0; buffer_size < sizeof(coded) - 1; ++buffer_size) { gsm_7bit_encode_n_ussd(coded, buffer_size, text, &octets_written); OSMO_ASSERT(octets_written <= buffer_size); OSMO_ASSERT(coded[buffer_size] == 0xaa); } } static void test_extract_ie_by_tag(void) { uint16_t ie_len; uint8_t *ie; int rc; printf("[i] Testing gsm0480_extract_ie_by_tag()\n"); /* REGISTER message with Facility IE */ rc = gsm0480_extract_ie_by_tag((struct gsm48_hdr *) ussd_request, sizeof(ussd_request), &ie, &ie_len, GSM0480_IE_FACILITY); OSMO_ASSERT(rc == 0); OSMO_ASSERT(ie != NULL && ie_len > 0); printf("[?] REGISTER message with Facility IE " "(len=%u): %s\n", ie_len, osmo_hexdump(ie, ie_len)); /* REGISTER message with SS version IE */ rc = gsm0480_extract_ie_by_tag((struct gsm48_hdr *) ussd_request, sizeof(ussd_request), &ie, &ie_len, GSM0480_IE_SS_VERSION); OSMO_ASSERT(rc == 0); OSMO_ASSERT(ie != NULL && ie_len > 0); printf("[?] REGISTER message with SS version IE " "(len=%u): %s\n", ie_len, osmo_hexdump(ie, ie_len)); /* REGISTER message with unknown IE */ rc = gsm0480_extract_ie_by_tag((struct gsm48_hdr *) ussd_request, sizeof(ussd_request), &ie, &ie_len, 0xff); OSMO_ASSERT(rc == 0); OSMO_ASSERT(ie == NULL && ie_len == 0); /* FACILITY message with Facility IE */ rc = gsm0480_extract_ie_by_tag((struct gsm48_hdr *) ussd_facility, sizeof(ussd_facility), &ie, &ie_len, GSM0480_IE_FACILITY); OSMO_ASSERT(rc == 0); OSMO_ASSERT(ie != NULL && ie_len > 0); printf("[?] FACILITY message with Facility IE " "(len=%u): %s\n", ie_len, osmo_hexdump(ie, ie_len)); /* FACILITY message with unknown IE */ rc = gsm0480_extract_ie_by_tag((struct gsm48_hdr *) ussd_facility, sizeof(ussd_facility), &ie, &ie_len, 0xff); OSMO_ASSERT(rc == 0); OSMO_ASSERT(ie == NULL && ie_len == 0); /* RELEASE COMPLETE message with Facility IE */ rc = gsm0480_extract_ie_by_tag((struct gsm48_hdr *) ussd_release, sizeof(ussd_release), &ie, &ie_len, GSM0480_IE_FACILITY); OSMO_ASSERT(rc == 0); OSMO_ASSERT(ie != NULL && ie_len > 0); printf("[?] RELEASE COMPLETE message with Facility IE " "(len=%u): %s\n", ie_len, osmo_hexdump(ie, ie_len)); /* RELEASE COMPLETE message without Facility IE */ rc = gsm0480_extract_ie_by_tag((struct gsm48_hdr *) ussd_release, sizeof(struct gsm48_hdr), &ie, &ie_len, GSM0480_IE_FACILITY); OSMO_ASSERT(rc == 0); OSMO_ASSERT(ie == NULL && ie_len == 0); printf("\n"); } static void test_parse_facility_ie(void) { struct ss_request req; uint16_t ie_len; uint8_t *ie; int rc; printf("[i] Testing gsm0480_parse_facility_ie()\n"); /* Extract Facility IE from FACILITY message */ rc = gsm0480_extract_ie_by_tag((struct gsm48_hdr *) ussd_facility, sizeof(ussd_facility), &ie, &ie_len, GSM0480_IE_FACILITY); OSMO_ASSERT(rc == 0); OSMO_ASSERT(ie != NULL && ie_len > 0); printf("[?] FACILITY message with Facility IE " "(len=%u): %s\n", ie_len, osmo_hexdump(ie, ie_len)); /* Attempt to decode */ memset(&req, 0x00, sizeof(req)); rc = gsm0480_parse_facility_ie(ie, ie_len, &req); OSMO_ASSERT(rc == 0); /* Verify expected vs decoded data */ printf("[?] InvokeID: expected 0x%02x, decoded 0x%02x\n", 0x01, req.invoke_id); printf("[?] Operation code: expected 0x%02x, decoded 0x%02x\n", 0x3c, req.opcode); printf("[?] Data Coding Scheme: expected 0x%02x, decoded 0x%02x\n", 0x0f, req.ussd_data_dcs); printf("[?] Data length: expected 0x%02x, decoded 0x%02x\n", 0x01, req.ussd_data_len); printf("[?] Data: expected %s, decoded %s\n", "32", osmo_hexdump_nospc(req.ussd_data, req.ussd_data_len)); printf("\n"); } int main(int argc, char **argv) { struct ss_request req; uint16_t size; int i; struct msgb *msg; void *ctx = talloc_named_const(NULL, 0, "ussd_test"); osmo_init_logging2(ctx, &info); /* Test gsm0480_extract_ie_by_tag() */ test_extract_ie_by_tag(); /* Test gsm0480_parse_facility_ie() */ test_parse_facility_ie(); memset(&req, 0, sizeof(req)); gsm0480_decode_ss_request((struct gsm48_hdr *) ussd_request, sizeof(ussd_request), &req); printf("Tested if it still works. Text was: %s\n", req.ussd_text); memset(&req, 0, sizeof(req)); gsm0480_decode_ss_request((struct gsm48_hdr *) interrogate_ss, sizeof(interrogate_ss), &req); OSMO_ASSERT(strlen((char *) req.ussd_text) == 0); OSMO_ASSERT(req.ss_code == 33); printf("interrogateSS CFU text..'%s' code %d\n", req.ussd_text, req.ss_code); printf("Testing parsing a USSD request and truncated versions\n"); size = sizeof(ussd_request); for (i = size; i > sizeof(struct gsm48_hdr); --i) { int rc = parse_ussd(&ussd_request[0], i); printf("Result for len=%d is %d\n", i, rc); } printf("Mangling the container now\n"); for (i = size; i > sizeof(struct gsm48_hdr) + 2; --i) { int rc = parse_mangle_ussd(&ussd_request[0], i); printf("Result for len=%d is %d\n", i, rc); } printf(" case test for 7 bit encode\n"); test_7bit_ussd("01234567", "b0986c46abd96e", ""); test_7bit_ussd("0123456", "b0986c46abd91a", ""); test_7bit_ussd("01234567\r", "b0986c46abd96e0d", ""); /* The appended \r is compliant to GSM 03.38 section 6.1.2.3.1: */ test_7bit_ussd("0123456\r", "b0986c46abd91a0d", "\r"); test_7bit_ussd("012345\r", "b0986c46ab351a", ""); printf("Checking GSM 04.80 USSD message generation.\n"); test_7bit_ussd("", "", ""); msg = gsm0480_create_unstructuredSS_Notify (0x00, ""); printf ("Created unstructuredSS_Notify (0x00): %s\n", osmo_hexdump(msgb_data(msg), msgb_length(msg))); msgb_free (msg); test_7bit_ussd("forty-two", "e6b79c9e6fd1ef6f", ""); msg = gsm0480_create_unstructuredSS_Notify (0x42, "forty-two"); printf ("Created unstructuredSS_Notify (0x42): %s\n", osmo_hexdump(msgb_data(msg), msgb_length(msg))); msgb_free (msg); return 0; }