/* * (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 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); octets_written = strlen(decoded); printf("decoded = %s\n\n", osmo_hexdump((uint8_t *)decoded, octets_written)); 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); } } int main(int argc, char **argv) { struct ss_request req; const int size = sizeof(ussd_request); int i; struct msgb *msg; osmo_init_logging(&info); gsm0480_decode_ss_request((struct gsm48_hdr *) ussd_request, size, &req); printf("Tested if it still works. Text was: %s\n", req.ussd_text); printf("Testing parsing a USSD request and truncated versions\n"); for (i = size; i > sizeof(struct gsm48_hdr); --i) { int rc = parse_ussd(&ussd_request[0], i); printf("Result for %d is %d\n", rc, i); } 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 %d is %d\n", rc, i); } 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; }