OpenBSC August 2013

openbsc@lists.osmocom.org

26 participants
49 discussions

[PATCH 1/2] sms: Added result buffer size parameter to 7bit conv funs

by Jacob Erlbeck

The 7bit<->8bit encoding/decoding functions didn't check whether there is still enough space in the destination buffer. Therefore a buffer size parameter ('n' like in snprintf) has been added to each of the functions which leads to truncation if the the buffer is too small. In addition, the return value of the decoding functions has been changed to number of characters written (excluding \0), so this value is always equal to strlen(decoded) if n>0. The old functions are still available as wrapper functions. --- include/osmocom/gsm/gsm_utils.h | 63 ++++++++++++++++-- src/gsm/gsm0480.c | 11 ++-- src/gsm/gsm_utils.c | 137 +++++++++++++++++++++++++-------------- src/gsm/libosmogsm.map | 7 +- tests/sms/sms_test.c | 128 ++++++++++++++++++++---------------- tests/sms/sms_test.ok | 10 +++ tests/ussd/ussd_test.c | 38 +++++++++-- 7 files changed, 268 insertions(+), 126 deletions(-) diff --git a/include/osmocom/gsm/gsm_utils.h b/include/osmocom/gsm/gsm_utils.h index 6cd46e4..bdb4c74 100644 --- a/include/osmocom/gsm/gsm_utils.h +++ b/include/osmocom/gsm/gsm_utils.h @@ -25,6 +25,7 @@ #ifndef GSM_UTILS_H #define GSM_UTILS_H +#include <stddef.h> #include <stdint.h> #define ADD_MODULO(sum, delta, modulo) do { \ @@ -56,17 +57,58 @@ enum gsm_band { const char *gsm_band_name(enum gsm_band band); enum gsm_band gsm_band_parse(const char *mhz); -int gsm_7bit_decode(char *decoded, const uint8_t *user_data, uint8_t length); -int gsm_7bit_decode_ussd(char *decoded, const uint8_t *user_data, uint8_t length); -int gsm_7bit_decode_hdr(char *decoded, const uint8_t *user_data, uint8_t length, uint8_t ud_hdr_ind); -int gsm_7bit_encode(uint8_t *result, const char *data); -int gsm_7bit_encode_ussd(uint8_t *result, const char *data, int *octets_written); -int gsm_7bit_encode_oct(uint8_t *result, const char *data, int *octets_written); +/* + * The following functions write at most n octets to the destination buffer + * ('decoded' or 'result') and return the number of octets written (always + * <= n). + */ + +/*! + * \brief Decode a sequence of GSM 03.38 encoded 7 bit characters. + * + * \param decoded The destination buffer for the decoded characters. + * \param n A maximum of n chars is written (incl. \0). + * \param user_data A pointer to the start of the packed 7bit character + * sequence. + * \param length The length of the input sequence (in octets). + * + * \returns the number of (8 bit) chars written excluding the terminating \0. + */ +int gsm_7bit_decode_n(char *decoded, size_t n, const uint8_t *user_data, uint8_t length); + +/*! + * \brief Decode a sequence of 7 bit characters (USSD encoding). + * + * \see gsm_7bit_encode_n() + */ +int gsm_7bit_decode_n_ussd(char *decoded, size_t n, const uint8_t *user_data, uint8_t length); -/* the three functions below are helper functions and here for the unit test */ +/** + * \brief Encode a text string into GSM 03.38 encoded 7 bit characters. + * + * \param result The destination buffer for the packed 7 bit sequence. + * \param n A maximum of n octets is written. + * \param data A pointer to the start of the \0 terminated 8 bit character + * string. + * \param octets_written Iff not NULL, *octets_written will be set to the + * number of octets written to the result buffer. + * + * \returns the number of septets that have been created. + */ +int gsm_7bit_encode_n(uint8_t *result, size_t n, const char *data, int *octets_written); + +/*! + * \brief Encode a text string into GSM 03.38 encoded 7 bit characters (USSD encoding). + * + * \see gsm_7bit_decode_n() + */ +int gsm_7bit_encode_n_ussd(uint8_t *result, size_t n, const char *data, int *octets_written); + +/* the four functions below are helper functions and here for the unit test */ int gsm_septets2octets(uint8_t *result, const uint8_t *rdata, uint8_t septet_len, uint8_t padding); int gsm_septet_encode(uint8_t *result, const char *data); uint8_t gsm_get_octet_len(const uint8_t sept_len); +int gsm_7bit_decode_n_hdr(char *decoded, size_t n, const uint8_t *user_data, uint8_t length, uint8_t ud_hdr_ind); unsigned int ms_class_gmsk_dbm(enum gsm_band band, int ms_class); @@ -154,5 +196,12 @@ enum gsm_chan_t { _GSM_LCHAN_MAX }; +/* Deprectated functions */ +int gsm_7bit_decode(char *decoded, const uint8_t *user_data, uint8_t length) __attribute__((deprecated ("Use gsm_7bit_decode_n() instead"))); +int gsm_7bit_decode_ussd(char *decoded, const uint8_t *user_data, uint8_t length) __attribute__((deprecated ("Use gsm_7bit_decode_n_ussd() instead"))); +int gsm_7bit_encode(uint8_t *result, const char *data) __attribute__((deprecated ("Use gsm_7bit_encode_n() instead"))); +int gsm_7bit_encode_ussd(uint8_t *result, const char *data, int *octets_written) __attribute__((deprecated ("Use gsm_7bit_encode_n_ussd() instead"))); +int gsm_7bit_encode_oct(uint8_t *result, const char *data, int *octets_written) __attribute__((deprecated ("Use gsm_7bit_encode_n() instead"))); + #endif diff --git a/src/gsm/gsm0480.c b/src/gsm/gsm0480.c index cc693fe..0f72593 100644 --- a/src/gsm/gsm0480.c +++ b/src/gsm/gsm0480.c @@ -105,7 +105,7 @@ struct msgb *gsm0480_create_unstructuredSS_Notify(int alertPattern, const char * msgb_put_u8(msg, ASN1_OCTET_STRING_TAG); ussd_len_ptr = msgb_put(msg, 1); data = msgb_put(msg, 0); - gsm_7bit_encode_ussd(data, text, &len); + gsm_7bit_encode_n_ussd(data, msgb_tailroom(msg), text, &len); msgb_put(msg, len); ussd_len_ptr[0] = len; /* USSD-String } */ @@ -172,7 +172,7 @@ struct msgb *gsm0480_create_notifySS(const char *text) msgb_put_u8(msg, 0x82); tmp_len = msgb_put(msg, 1); data = msgb_put(msg, 0); - gsm_7bit_encode_ussd(data, text, &len); + gsm_7bit_encode_n_ussd(data, msgb_tailroom(msg), text, &len); tmp_len[0] = len; msgb_put(msg, len); @@ -398,10 +398,7 @@ static int parse_process_uss_req(const uint8_t *uss_req_data, uint16_t length, if ((dcs == 0x0F) && (uss_req_data[5] == ASN1_OCTET_STRING_TAG)) { num_chars = (uss_req_data[6] * 8) / 7; - /* Prevent a mobile-originated buffer-overrun! */ - if (num_chars > MAX_LEN_USSD_STRING) - num_chars = MAX_LEN_USSD_STRING; - gsm_7bit_decode_ussd(req->text, + gsm_7bit_decode_n_ussd(req->text, sizeof (req->text), &(uss_req_data[7]), num_chars); rc = 1; } @@ -423,7 +420,7 @@ struct msgb *gsm0480_create_ussd_resp(uint8_t invoke_id, uint8_t trans_id, const /* First put the payload text into the message */ ptr8 = msgb_put(msg, 0); - gsm_7bit_encode_ussd(ptr8, text, &response_len); + gsm_7bit_encode_n_ussd(ptr8, msgb_tailroom(msg), text, &response_len); msgb_put(msg, response_len); /* Then wrap it as an Octet String */ diff --git a/src/gsm/gsm_utils.c b/src/gsm/gsm_utils.c index 3dd1537..d76a5f2 100644 --- a/src/gsm/gsm_utils.c +++ b/src/gsm/gsm_utils.c @@ -123,12 +123,18 @@ uint8_t gsm_get_octet_len(const uint8_t sept_len){ } /* GSM 03.38 6.2.1 Character unpacking */ -int gsm_7bit_decode_hdr(char *text, const uint8_t *user_data, uint8_t septet_l, uint8_t ud_hdr_ind) +int gsm_7bit_decode_n_hdr(char *text, size_t n, const uint8_t *user_data, uint8_t septet_l, uint8_t ud_hdr_ind) { int i = 0; int shift = 0; - uint8_t c; + uint8_t c7, c8; uint8_t next_is_ext = 0; + const char *text_buf_begin = text; + const char *text_buf_end = text + n; + int nchars; + + if (n == 0) + return 0; /* skip the user data header */ if (ud_hdr_ind) { @@ -139,50 +145,49 @@ int gsm_7bit_decode_hdr(char *text, const uint8_t *user_data, uint8_t septet_l, septet_l = septet_l - shift; } - for (i = 0; i < septet_l; i++) { - c = + for (i = 0; i < septet_l && text != text_buf_end - 1; i++) { + c7 = ((user_data[((i + shift) * 7 + 7) >> 3] << (7 - (((i + shift) * 7 + 7) & 7))) | (user_data[((i + shift) * 7) >> 3] >> (((i + shift) * 7) & 7))) & 0x7f; - /* this is an extension character */ if (next_is_ext) { + /* this is an extension character */ next_is_ext = 0; - *(text++) = gsm_7bit_alphabet[0x7f + c]; - continue; - } - - if (c == 0x1b && i + 1 < septet_l) { + c8 = gsm_7bit_alphabet[0x7f + c7]; + } else if (c7 == 0x1b && i + 1 < septet_l) { next_is_ext = 1; + continue; } else { - *(text++) = gsm_septet_lookup(c); + c8 = gsm_septet_lookup(c7); } + + *(text++) = c8; } - if (ud_hdr_ind) - i += shift; + nchars = (int)text - (int)text_buf_begin; + *text = '\0'; - return i; + return nchars; } -int gsm_7bit_decode(char *text, const uint8_t *user_data, uint8_t septet_l) +int gsm_7bit_decode_n(char *text, size_t n, const uint8_t *user_data, uint8_t septet_l) { - return gsm_7bit_decode_hdr(text, user_data, septet_l, 0); + return gsm_7bit_decode_n_hdr(text, n, user_data, septet_l, 0); } -int gsm_7bit_decode_ussd(char *text, const uint8_t *user_data, uint8_t length) +int gsm_7bit_decode_n_ussd(char *text, size_t n, const uint8_t *user_data, uint8_t length) { - int i; + int nchars; - gsm_7bit_decode_hdr(text, user_data, length, 0); - i = strlen(text); + nchars = gsm_7bit_decode_n_hdr(text, n, user_data, length, 0); /* remove last <CR>, if it fits up to the end of last octet */ - if (i && (user_data[gsm_get_octet_len(length) - 1] >> 1) == '\r') - text[--i] = '\0'; + if (nchars && (user_data[gsm_get_octet_len(length) - 1] >> 1) == '\r') + text[--nchars] = '\0'; - return i; + return nchars; } /* GSM 03.38 6.2.1 Prepare character packing */ @@ -261,38 +266,23 @@ int gsm_septets2octets(uint8_t *result, const uint8_t *rdata, uint8_t septet_len } /* GSM 03.38 6.2.1 Character packing */ -int gsm_7bit_encode(uint8_t *result, const char *data) -{ - int out; - return gsm_7bit_encode_oct(result, data, &out); -} - -int gsm_7bit_encode_ussd(uint8_t *result, const char *data, int *octets) -{ - int y; - - y = gsm_7bit_encode_oct(result, data, octets); - /* if last octet contains only one bit, add <CR> */ - if (((y * 7) & 7) == 1) - result[(*octets) - 1] |= ('\r' << 1); - /* if last character is <CR> and completely fills last octet, add - * another <CR>. */ - if (y && ((y * 7) & 7) == 0 && (result[(*octets) - 1] >> 1) == '\r') { - result[(*octets)++] = '\r'; - y++; - } - - return y; -} - -int gsm_7bit_encode_oct(uint8_t *result, const char *data, int *octets) +int gsm_7bit_encode_n(uint8_t *result, size_t n, const char *data, int *octets) { int y = 0; + int o; + int max_septets = n * 8 / 7; /* prepare for the worst case, every character expanding to two bytes */ uint8_t *rdata = calloc(strlen(data) * 2, sizeof(uint8_t)); y = gsm_septet_encode(rdata, data); - *octets = gsm_septets2octets(result, rdata, y, 0); + + if (y > max_septets) + y = max_septets; + + o = gsm_septets2octets(result, rdata, y, 0); + + if (octets) + *octets = o; free(rdata); @@ -309,6 +299,24 @@ int gsm_7bit_encode_oct(uint8_t *result, const char *data, int *octets) return y; } +int gsm_7bit_encode_n_ussd(uint8_t *result, size_t n, const char *data, int *octets) +{ + int y; + + y = gsm_7bit_encode_n(result, n, data, octets); + /* if last octet contains only one bit, add <CR> */ + if (((y * 7) & 7) == 1) + result[(*octets) - 1] |= ('\r' << 1); + /* if last character is <CR> and completely fills last octet, add + * another <CR>. */ + if (y && ((y * 7) & 7) == 0 && (result[(*octets) - 1] >> 1) == '\r' && *octets < n - 1) { + result[(*octets)++] = '\r'; + y++; + } + + return y; +} + /* convert power class to dBm according to GSM TS 05.05 */ unsigned int ms_class_gmsk_dbm(enum gsm_band band, int class) { @@ -662,3 +670,34 @@ uint32_t gprs_tmsi2tlli(uint32_t p_tmsi, enum gprs_tlli_type type) } return tlli; } + +/* Wrappers for deprecated functions: */ + +int gsm_7bit_decode(char *text, const uint8_t *user_data, uint8_t septet_l) +{ + gsm_7bit_decode_n(text, SIZE_MAX, user_data, septet_l); + + /* Mimic the original behaviour. */ + return septet_l; +} + +int gsm_7bit_decode_ussd(char *text, const uint8_t *user_data, uint8_t length) +{ + return gsm_7bit_decode_n_ussd(text, SIZE_MAX, user_data, length); +} + +int gsm_7bit_encode(uint8_t *result, const char *data) +{ + int out; + return gsm_7bit_encode_n(result, SIZE_MAX, data, &out); +} + +int gsm_7bit_encode_ussd(uint8_t *result, const char *data, int *octets) +{ + return gsm_7bit_encode_n_ussd(result, SIZE_MAX, data, octets); +} + +int gsm_7bit_encode_oct(uint8_t *result, const char *data, int *octets) +{ + return gsm_7bit_encode_n(result, SIZE_MAX, data, octets); +} diff --git a/src/gsm/libosmogsm.map b/src/gsm/libosmogsm.map index 1b985e1..9d15d66 100644 --- a/src/gsm/libosmogsm.map +++ b/src/gsm/libosmogsm.map @@ -133,11 +133,16 @@ gsm48_rr_att_tlvdef; gsm_7bit_decode; gsm_7bit_decode_ussd; -gsm_7bit_decode_hdr; gsm_7bit_encode; gsm_7bit_encode_ussd; gsm_7bit_encode_oct; +gsm_7bit_decode_n; +gsm_7bit_decode_n_ussd; +gsm_7bit_decode_n_hdr; +gsm_7bit_encode_n; +gsm_7bit_encode_n_ussd; + gsm_arfcn2band; gsm_arfcn2freq10; gsm_freq102arfcn; diff --git a/tests/sms/sms_test.c b/tests/sms/sms_test.c index e48f9a3..c0f5bf6 100644 --- a/tests/sms/sms_test.c +++ b/tests/sms/sms_test.c @@ -116,14 +116,14 @@ static const uint8_t concatenated_part2_enc[] = { static const struct test_case test_multiple_encode[] = { { - .input = concatenated_text, + .input = (const uint8_t *)concatenated_text, .expected = concatenated_part1_enc, .expected_octet_length = sizeof(concatenated_part1_enc), .expected_septet_length = concatenated_part1_septet_length, .ud_hdr_ind = 1, }, { - .input = concatenated_text, + .input = (const uint8_t *)concatenated_text, .expected = concatenated_part2_enc, .expected_octet_length = sizeof(concatenated_part2_enc), .expected_septet_length = concatenated_part2_septet_length, @@ -134,28 +134,28 @@ static const struct test_case test_multiple_encode[] = static const struct test_case test_encode[] = { { - .input = simple_text, + .input = (const uint8_t *)simple_text, .expected = simple_enc, .expected_octet_length = sizeof(simple_enc), .expected_septet_length = simple_septet_length, .ud_hdr_ind = 0, }, { - .input = escape_text, + .input = (const uint8_t *)escape_text, .expected = escape_enc, .expected_octet_length = sizeof(escape_enc), .expected_septet_length = escape_septet_length, .ud_hdr_ind = 0, }, { - .input = enhanced_text, + .input = (const uint8_t *)enhanced_text, .expected = enhanced_enc, .expected_octet_length = sizeof(enhanced_enc), .expected_septet_length = enhanced_septet_length, .ud_hdr_ind = 0, }, { - .input = enhancedV2_text, + .input = (const uint8_t *)enhancedV2_text, .expected = enhancedV2_enc, .expected_octet_length = sizeof(enhancedV2_enc), .expected_septet_length = enhancedV2_septet_length, @@ -168,42 +168,42 @@ static const struct test_case test_decode[] = { .input = simple_enc, .input_length = sizeof(simple_enc), - .expected = simple_text, + .expected = (const uint8_t *)simple_text, .expected_septet_length = simple_septet_length, .ud_hdr_ind = 0, }, { .input = escape_enc, .input_length = sizeof(escape_enc), - .expected = escape_text, + .expected = (const uint8_t *)escape_text, .expected_septet_length = escape_septet_length, .ud_hdr_ind = 0, }, { .input = enhanced_enc, .input_length = sizeof(enhanced_enc), - .expected = enhanced_text, + .expected = (const uint8_t *)enhanced_text, .expected_septet_length = enhanced_septet_length, .ud_hdr_ind = 0, }, { .input = enhancedV2_enc, .input_length = sizeof(enhancedV2_enc), - .expected = enhancedV2_text, + .expected = (const uint8_t *)enhancedV2_text, .expected_septet_length = enhancedV2_septet_length, .ud_hdr_ind = 0, }, { .input = concatenated_part1_enc, .input_length = sizeof(concatenated_part1_enc), - .expected = splitted_text_part1, + .expected = (const uint8_t *)splitted_text_part1, .expected_septet_length = concatenated_part1_septet_length_with_header, .ud_hdr_ind = 1, }, { .input = concatenated_part2_enc, .input_length = sizeof(concatenated_part2_enc), - .expected = splitted_text_part2, + .expected = (const uint8_t *)splitted_text_part2, .expected_septet_length = concatenated_part2_septet_length_with_header, .ud_hdr_ind = 1, }, @@ -216,7 +216,7 @@ static void test_octet_return() printf("Encoding some tests and printing number of septets/octets\n"); - septets = gsm_7bit_encode_oct((uint8_t *) out, "test1234", &oct); + septets = gsm_7bit_encode_n((uint8_t *) out, sizeof(out), "test1234", &oct); printf("SEPTETS: %d OCTETS: %d\n", septets, oct); printf("Done\n"); @@ -227,43 +227,58 @@ int main(int argc, char** argv) printf("SMS testing\n"); struct msgb *msg; uint8_t i; - + uint16_t buffer_size; uint8_t octet_length; + int octets_written; + uint8_t computed_octet_length; uint8_t septet_length; uint8_t gsm_septet_length; uint8_t coded[256]; uint8_t tmp[160]; uint8_t septet_data[256]; uint8_t ud_header[6]; + int nchars; char result[256]; /* test 7-bit encoding */ for (i = 0; i < ARRAY_SIZE(test_encode); ++i) { memset(coded, 0x42, sizeof(coded)); - septet_length = gsm_7bit_encode(coded, test_encode[i].input); - octet_length = gsm_get_octet_len(septet_length); - if (octet_length != test_encode[i].expected_octet_length) { - fprintf(stderr, "Encode case %d: Octet length failure. Got %d, expected %d\n", - i, octet_length, test_encode[i].expected_octet_length); - return -1; - } - - if (septet_length != test_encode[i].expected_septet_length){ - fprintf(stderr, "Encode case %d: Septet length failure. Got %d, expected %d\n", - i, septet_length, test_encode[i].expected_septet_length); - return -1; - } - - if (memcmp(coded, test_encode[i].expected, octet_length) != 0) { - fprintf(stderr, "Encoded content does not match for case %d\n", - i); - return -1; + septet_length = gsm_7bit_encode_n(coded, sizeof(coded), + (const char *)test_encode[i].input, + &octets_written); + computed_octet_length = gsm_get_octet_len(septet_length); + printf("Encode case %d: " + "Octet length %d (expected %d, computed %d), " + "septet length %d (expected %d)\n" + , i + , octets_written, test_encode[i].expected_octet_length, computed_octet_length + , septet_length, test_encode[i].expected_septet_length + ); + + OSMO_ASSERT (octets_written == test_encode[i].expected_octet_length); + OSMO_ASSERT (octets_written == computed_octet_length); + OSMO_ASSERT (memcmp(coded, test_encode[i].expected, octets_written) == 0); + + /* check buffer limiting */ + memset(coded, 0xaa, sizeof(coded)); + + for (buffer_size = 0; + buffer_size < test_encode[i].expected_octet_length + 1 + && buffer_size < sizeof(coded) - 1; + ++buffer_size) + { + gsm_7bit_encode_n(coded, buffer_size, + (const char *)test_encode[i].input, + &octets_written); + + OSMO_ASSERT(octets_written <= buffer_size); + OSMO_ASSERT(coded[buffer_size] == 0xaa); } } /* Test: encode multiple SMS */ - int number_of_septets = gsm_septet_encode(septet_data, test_multiple_encode[0].input); + int number_of_septets = gsm_septet_encode(septet_data, (const char *)test_multiple_encode[0].input); /* SMS part 1 */ memset(tmp, 0x42, sizeof(tmp)); @@ -281,11 +296,7 @@ int main(int argc, char** argv) memset(coded, 0x42, sizeof(coded)); memcpy(coded, tmp, octet_length + 6); - if (memcmp(coded, test_multiple_encode[0].expected, octet_length) != 0) { - fprintf(stderr, "Multiple-SMS encoded content does not match for part 1\n"); - return -1; - } - + OSMO_ASSERT(memcmp(coded, test_multiple_encode[0].expected, octet_length) == 0); /* SMS part 2 */ memset(tmp, 0x42, sizeof(tmp)); @@ -303,27 +314,34 @@ int main(int argc, char** argv) memset(coded, 0x42, sizeof(coded)); memcpy(coded, tmp, octet_length + 6); - if (memcmp(coded, test_multiple_encode[1].expected, octet_length) != 0) { - fprintf(stderr, "Multiple-SMS encoded content does not match for part 2\n"); - return -1; - } - - + OSMO_ASSERT(memcmp(coded, test_multiple_encode[1].expected, octet_length) == 0); /* test 7-bit decoding */ for (i = 0; i < ARRAY_SIZE(test_decode); ++i) { - memset(result, 0x42, sizeof(coded)); - septet_length = gsm_7bit_decode_hdr(result, test_decode[i].input, + memset(result, 0x42, sizeof(result)); + nchars = gsm_7bit_decode_n_hdr(result, sizeof(result), test_decode[i].input, test_decode[i].expected_septet_length, test_decode[i].ud_hdr_ind); - - if (strcmp(result, test_decode[i].expected) != 0) { - fprintf(stderr, "Test case %d failed to decode.\n", i); - return -1; - } - if (septet_length != test_decode[i].expected_septet_length) { - fprintf(stderr, "Decode case %d: Septet length failure. Got %d, expected %d\n", - i, septet_length, test_decode[i].expected_septet_length); - return -1; + printf("Decode case %d: return value %d (expected %d)\n", i, nchars, strlen(result)); + + OSMO_ASSERT(strcmp(result, (const char *)test_decode[i].expected) == 0); + OSMO_ASSERT(nchars == strlen(result)); + + /* check buffer limiting */ + memset(result, 0xaa, sizeof(result)); + + for (buffer_size = 0; + buffer_size < test_encode[i].expected_septet_length + 1 + && buffer_size < sizeof(result) - 1; + ++buffer_size) + { + nchars = gsm_7bit_decode_n_hdr(result, buffer_size, test_decode[i].input, + test_decode[i].expected_septet_length, test_decode[i].ud_hdr_ind); + + OSMO_ASSERT(nchars <= buffer_size); + OSMO_ASSERT(result[buffer_size] == (char)0xaa); + if (buffer_size > 0) { + OSMO_ASSERT(result[nchars] == '\0'); + } } } diff --git a/tests/sms/sms_test.ok b/tests/sms/sms_test.ok index ce6cb17..915a59c 100644 --- a/tests/sms/sms_test.ok +++ b/tests/sms/sms_test.ok @@ -1,4 +1,14 @@ SMS testing +Encode case 0: Octet length 8 (expected 8, computed 8), septet length 9 (expected 9) +Encode case 1: Octet length 36 (expected 36, computed 36), septet length 41 (expected 41) +Encode case 2: Octet length 35 (expected 35, computed 35), septet length 39 (expected 39) +Encode case 3: Octet length 35 (expected 35, computed 35), septet length 40 (expected 40) +Decode case 0: return value 9 (expected 9) +Decode case 1: return value 40 (expected 40) +Decode case 2: return value 31 (expected 31) +Decode case 3: return value 32 (expected 32) +Decode case 4: return value 153 (expected 153) +Decode case 5: return value 40 (expected 40) Encoding some tests and printing number of septets/octets SEPTETS: 8 OCTETS: 7 Done diff --git a/tests/ussd/ussd_test.c b/tests/ussd/ussd_test.c index e3e8e08..9985ac5 100644 --- a/tests/ussd/ussd_test.c +++ b/tests/ussd/ussd_test.c @@ -73,20 +73,44 @@ static void test_7bit_ussd(const char *text, const char *encoded_hex, const char { uint8_t coded[256]; char decoded[256]; - int y; + int octets_written; + int buffer_size; + int nchars; printf("original = %s\n", osmo_hexdump((uint8_t *)text, strlen(text))); - gsm_7bit_encode_ussd(coded, text, &y); - printf("encoded = %s\n", osmo_hexdump(coded, y)); + 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, y)) == 0); + OSMO_ASSERT(strcmp(encoded_hex, osmo_hexdump_nospc(coded, octets_written)) == 0); - gsm_7bit_decode_ussd(decoded, coded, y * 8 / 7); - y = strlen(decoded); - printf("decoded = %s\n\n", osmo_hexdump((uint8_t *)decoded, y)); + 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 = 0; 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); + if (buffer_size > 0) { + 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) -- 1.7.9.5

12 years

Channel allocation stress-test

by Andreas Eversberg

dear holger, i tried your channel allocation stress-test patch for openbsc with osmo-bts-trx. i had no crashes, but it helped me to find a bug in the scheduler. i remember that there was an issue that causes a crash of osmo-bts (sysmobts, trx ?), but i am not sure. if so, can you give me a hint, which test procedure caused a crash? regards, andreas

12 years

MultiCarrier with UmTRX + OsmoBTS

by Daud Suleiman

Hi, Is MultiCarrier operation possible with the UmTRX in combination either OsmoBTS? On another note, is it possible for the outbound MNCC interface to pass call control to a standard SIP softswitch (kamaillio?) without going through LCR?

12 years

[PATCH] Fix: Use gsm_7bit_encode_ussd function to encode USSD response

by Andreas Eversberg

The New function offers the actual octet that is needed to correctly compose USSD response. --- openbsc/src/libmsc/gsm_04_80.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/openbsc/src/libmsc/gsm_04_80.c b/openbsc/src/libmsc/gsm_04_80.c index 39738a5..1b1c449 100644 --- a/openbsc/src/libmsc/gsm_04_80.c +++ b/openbsc/src/libmsc/gsm_04_80.c @@ -72,7 +72,7 @@ int gsm0480_send_ussd_response(struct gsm_subscriber_connection *conn, /* First put the payload text into the message */ ptr8 = msgb_put(msg, 0); - response_len = gsm_7bit_encode(ptr8, response_text); + gsm_7bit_encode_ussd(ptr8, response_text, &response_len); msgb_put(msg, response_len); /* Then wrap it as an Octet String */ -- 1.7.3.4

12 years

[PATCH 1/3] encoding: Provide an overload for the gsm_7bit_encode and a simple test

by Jacob Erlbeck

From: Holger Hans Peter Freyther <zecke(a)selfish.org> This is required for encoding the SMS header using the alpha numeric rules. Reviewed-by: Jacob Erlbeck <jerlbeck(a)sysmocom.de> --- include/osmocom/gsm/gsm_utils.h | 1 + src/gsm/gsm_utils.c | 10 ++++++++-- src/gsm/libosmogsm.map | 1 + tests/sms/sms_test.c | 15 +++++++++++++++ tests/sms/sms_test.ok | 3 +++ 5 files changed, 28 insertions(+), 2 deletions(-) diff --git a/include/osmocom/gsm/gsm_utils.h b/include/osmocom/gsm/gsm_utils.h index cf63ea4..a572f50 100644 --- a/include/osmocom/gsm/gsm_utils.h +++ b/include/osmocom/gsm/gsm_utils.h @@ -59,6 +59,7 @@ enum gsm_band gsm_band_parse(const char *mhz); int gsm_7bit_decode(char *decoded, const uint8_t *user_data, uint8_t length); int gsm_7bit_decode_hdr(char *decoded, const uint8_t *user_data, uint8_t length, uint8_t ud_hdr_ind); int gsm_7bit_encode(uint8_t *result, const char *data); +int gsm_7bit_encode_oct(uint8_t *result, const char *data, int *octets_written); /* the three functions below are helper functions and here for the unit test */ int gsm_septets2octets(uint8_t *result, const uint8_t *rdata, uint8_t septet_len, uint8_t padding); diff --git a/src/gsm/gsm_utils.c b/src/gsm/gsm_utils.c index 9569cf3..54b965e 100644 --- a/src/gsm/gsm_utils.c +++ b/src/gsm/gsm_utils.c @@ -1,6 +1,6 @@ /* * (C) 2008 by Daniel Willmann <daniel(a)totalueberwachung.de> - * (C) 2009 by Holger Hans Peter Freyther <zecke(a)selfish.org> + * (C) 2009,2013 by Holger Hans Peter Freyther <zecke(a)selfish.org> * (C) 2009-2010 by Harald Welte <laforge(a)gnumonks.org> * (C) 2010-2012 by Nico Golde <nico(a)ngolde.de> * @@ -250,12 +250,18 @@ int gsm_septets2octets(uint8_t *result, const uint8_t *rdata, uint8_t septet_len /* GSM 03.38 6.2.1 Character packing */ int gsm_7bit_encode(uint8_t *result, const char *data) { + int out; + return gsm_7bit_encode_oct(result, data, &out); +} + +int gsm_7bit_encode_oct(uint8_t *result, const char *data, int *octets) +{ int y = 0; /* prepare for the worst case, every character expanding to two bytes */ uint8_t *rdata = calloc(strlen(data) * 2, sizeof(uint8_t)); y = gsm_septet_encode(rdata, data); - gsm_septets2octets(result, rdata, y, 0); + *octets = gsm_septets2octets(result, rdata, y, 0); free(rdata); diff --git a/src/gsm/libosmogsm.map b/src/gsm/libosmogsm.map index b2278f1..8a020db 100644 --- a/src/gsm/libosmogsm.map +++ b/src/gsm/libosmogsm.map @@ -134,6 +134,7 @@ gsm48_rr_att_tlvdef; gsm_7bit_decode; gsm_7bit_decode_hdr; gsm_7bit_encode; +gsm_7bit_encode_oct; gsm_arfcn2band; gsm_arfcn2freq10; diff --git a/tests/sms/sms_test.c b/tests/sms/sms_test.c index 6df4b62..e48f9a3 100644 --- a/tests/sms/sms_test.c +++ b/tests/sms/sms_test.c @@ -209,6 +209,19 @@ static const struct test_case test_decode[] = }, }; +static void test_octet_return() +{ + char out[256]; + int oct, septets; + + printf("Encoding some tests and printing number of septets/octets\n"); + + septets = gsm_7bit_encode_oct((uint8_t *) out, "test1234", &oct); + printf("SEPTETS: %d OCTETS: %d\n", septets, oct); + + printf("Done\n"); +} + int main(int argc, char** argv) { printf("SMS testing\n"); @@ -314,6 +327,8 @@ int main(int argc, char** argv) } } + test_octet_return(); + printf("OK\n"); return 0; } diff --git a/tests/sms/sms_test.ok b/tests/sms/sms_test.ok index d0e0983..ce6cb17 100644 --- a/tests/sms/sms_test.ok +++ b/tests/sms/sms_test.ok @@ -1,2 +1,5 @@ SMS testing +Encoding some tests and printing number of septets/octets +SEPTETS: 8 OCTETS: 7 +Done OK -- 1.7.9.5

12 years

Stopping OpenBSC

by Ash Gibbons

That's fantastic, thank you. Is there a VTY command to do the same? Many thanks,

12 years

Stopping OpenBSC

by Ash Gibbons

Bit of a random one, After I start Osmo-NITB is there any way for me to stop the process. I have had a look around the VTY interface, with not much luck. The only way I have found so far is by pressing CTRL+Z in the terminal window, but I then have to restart the computer to be able to start Osmo-NITB again. Many thanks, Ash

12 years

[PATCH 1/2] vty: Fix misusage of snprintf in vty/utils.c

by Jacob Erlbeck

Compiled with ubuntu 1204 (precise), where -Wformat-security is enabled by -Wall. Test yields ok, but the current implementation doesn't properly support multi-character separators and end strings. So the test output is truncated. Addresses: utils.c: In function 'vty_cmd_string_from_valstr': utils.c:84:2: warning: format not a string literal and no format arguments [-Wformat-security] utils.c:84:2: warning: format not a string literal and no format arguments [-Wformat-security] utils.c:108:2: warning: format not a string literal and no format arguments [-Wformat-security] utils.c:108:2: warning: format not a string literal and no format arguments [-Wformat-security] --- .gitignore | 1 + src/vty/utils.c | 4 ++-- tests/Makefile.am | 9 +++++-- tests/testsuite.at | 6 +++++ tests/vty/vty_test.c | 62 +++++++++++++++++++++++++++++++++++++++++++++++++ tests/vty/vty_test.ok | 3 +++ 6 files changed, 81 insertions(+), 4 deletions(-) create mode 100644 tests/vty/vty_test.c create mode 100644 tests/vty/vty_test.ok diff --git a/.gitignore b/.gitignore index 2ed0144..da36165 100644 --- a/.gitignore +++ b/.gitignore @@ -72,6 +72,7 @@ tests/fr/fr_test tests/loggingrb/loggingrb_test tests/ringbuf/ringbuf_test tests/strrb/strrb_test +tests/vty/vty_test utils/osmo-arfcn utils/osmo-auc-gen diff --git a/src/vty/utils.c b/src/vty/utils.c index e9c0d2d..88932fa 100644 --- a/src/vty/utils.c +++ b/src/vty/utils.c @@ -81,7 +81,7 @@ char *vty_cmd_string_from_valstr(void *ctx, const struct value_string *vals, if (!str) return NULL; - ret = snprintf(str + offset, rem, prefix); + ret = snprintf(str + offset, rem, "%s", prefix); if (ret < 0) goto err; OSMO_SNPRINTF_RET(ret, rem, offset, len); @@ -105,7 +105,7 @@ char *vty_cmd_string_from_valstr(void *ctx, const struct value_string *vals, offset--; /* to remove the trailing | */ rem++; - ret = snprintf(str + offset, rem, end); + ret = snprintf(str + offset, rem, "%s", end); if (ret < 0) goto err; OSMO_SNPRINTF_RET(ret, rem, offset, len); diff --git a/tests/Makefile.am b/tests/Makefile.am index e5fc718..ecb2b6c 100644 --- a/tests/Makefile.am +++ b/tests/Makefile.am @@ -5,7 +5,8 @@ check_PROGRAMS = timer/timer_test sms/sms_test ussd/ussd_test \ conv/conv_test auth/milenage_test lapd/lapd_test \ gsm0808/gsm0808_test gsm0408/gsm0408_test \ gb/bssgp_fc_test logging/logging_test fr/fr_test \ - loggingrb/loggingrb_test strrb/strrb_test + loggingrb/loggingrb_test strrb/strrb_test \ + vty/vty_test if ENABLE_MSGFILE check_PROGRAMS += msgfile/msgfile_test @@ -62,6 +63,9 @@ loggingrb_loggingrb_test_LDADD = $(top_builddir)/src/libosmocore.la $(top_buildd strrb_strrb_test_SOURCES = strrb/strrb_test.c strrb_strrb_test_LDADD = $(top_builddir)/src/libosmocore.la +vty_vty_test_SOURCES = vty/vty_test.c +vty_vty_test_LDADD = $(top_builddir)/src/vty/libosmovty.la $(top_builddir)/src/libosmocore.la + # The `:;' works around a Bash 3.2 bug when the output is not writeable. $(srcdir)/package.m4: $(top_srcdir)/configure.ac @@ -91,7 +95,8 @@ EXTRA_DIST = testsuite.at $(srcdir)/package.m4 $(TESTSUITE) \ msgfile/msgfile_test.ok msgfile/msgconfig.cfg \ logging/logging_test.ok logging/logging_test.err \ fr/fr_test.ok loggingrb/logging_test.ok \ - loggingrb/logging_test.err strrb/strrb_test.ok + loggingrb/logging_test.err strrb/strrb_test.ok \ + vty/vty_test.ok DISTCLEANFILES = atconfig diff --git a/tests/testsuite.at b/tests/testsuite.at index 684ec4f..1a6fa55 100644 --- a/tests/testsuite.at +++ b/tests/testsuite.at @@ -112,3 +112,9 @@ AT_KEYWORDS([strrb]) cat $abs_srcdir/strrb/strrb_test.ok > expout AT_CHECK([$abs_top_builddir/tests/strrb/strrb_test], [0], [expout], [ignore]) AT_CLEANUP + +AT_SETUP([vty]) +AT_KEYWORDS([vty]) +cat $abs_srcdir/vty/vty_test.ok > expout +AT_CHECK([$abs_top_builddir/tests/vty/vty_test], [0], [expout], [ignore]) +AT_CLEANUP diff --git a/tests/vty/vty_test.c b/tests/vty/vty_test.c new file mode 100644 index 0000000..6a53fb8 --- /dev/null +++ b/tests/vty/vty_test.c @@ -0,0 +1,62 @@ +/* (C) 2013 by Jacob Erlbeck <jerlbeck(a)osmocom.de> + * All Rights Reserved + * + * This program is iree 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 3 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 <string.h> + +#include <osmocom/core/talloc.h> +#include <osmocom/core/logging.h> +#include <osmocom/core/utils.h> +#include <osmocom/vty/misc.h> + +static void init_vty(void) +{ +} + +static void free_vty(void) +{ +} + +static void test_cmd_string_from_valstr(void) +{ + char *cmd; + const struct value_string printf_seq_vs[] = { + { .value = 42, .str = "[foo%s%s%s%s%s]"}, + { .value = 43, .str = "[bar%s%s%s%s%s]"}, + { .value = 0, .str = NULL} + }; + + printf("Going to test vty_cmd_string_from_valstr()\n"); + + // check against character strings that could break printf + + cmd = vty_cmd_string_from_valstr (NULL, printf_seq_vs, "[prefix%s%s%s%s%s]", "[sep%s%s%s%s%s]", "[end%s%s%s%s%s]", 1); + printf ("Tested with %%s-strings, resulting cmd = '%s'\n", cmd); + talloc_free (cmd); +} + +int main(int argc, char **argv) +{ + init_vty(); + test_cmd_string_from_valstr(); + printf("All tests passed\n"); + + free_vty(); + return 0; +} diff --git a/tests/vty/vty_test.ok b/tests/vty/vty_test.ok new file mode 100644 index 0000000..9ff68c8 --- /dev/null +++ b/tests/vty/vty_test.ok @@ -0,0 +1,3 @@ +Going to test vty_cmd_string_from_valstr() +Tested with %s-strings, resulting cmd = '[prefix%s%s%s%s%s][foo%s%s%s%s%s][sep%s%s%s%s%s][' +All tests passed -- 1.7.9.5

12 years

Re: Buying a nanoBTS

by Patrick Voerman

Patrick Klapper <ptmk06 <at> googlemail.com> writes: > > Hello, > > I am interested in buying a nanoBTS. > The sales department of ip.access told me, that they only sell their products to mobile operators. > > Where can I buy an ip.access nanoBTS (GSM1800) and what's its price? > > Regards > > Patrick > > Hello Patrick, Still searching for the nanoBTS? I have one for sale. Kind regards, Patrick =======

12 years

Picocell EDGE Omnicell@Work - Nokia/RadioFrame Networks, Inc.

by Luca Bongiorni

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hey folks, I have just received this new piece of hardware and I wanted to share some preliminary info about it. As far as I noticed, the picocell was used by Orange UK some years ago. As you will see from the photos below the board has different populated pins, which one of them seems a 14-pin JTAG connector. (I apologise for the low quality of the images, but at the moment is the best I can do) At the moment I am unable to fully test it cause logic analyzer, jtag and uart connectors are physically not with me. In the meanwhile I will get them, I was wondering if someone of you guys already had the opportunity to play with it. Or have more info/specs/etc. about it. - ------------------------------------- IC PRIXPH425BT (Intel): - ------------------------------------- http://media.digikey.com/pdf/Data%20Sheets/Intel%20PDFs/IXP42X,%20IXC1100.p… http://media.digikey.com/pdf/Data%20Sheets/Intel%20PDFs/IXP42X,%20IXC1100%2… - ------------------------------------- PHOTOS - ------------------------------------- http://imageshack.us/a/img856/5395/d0xt.jpg http://imageshack.us/a/img266/8011/x64h.jpg http://imageshack.us/a/img801/9504/0zir.jpg http://imageshack.us/a/img839/4488/sq4r.jpg - ------------------------------------- NMAP SCAN - ------------------------------------- These are the ports available on the LAN side: PORT STATE SERVICE VERSION 22/tcp open ssh Dropbear sshd 0.47 (protocol 2.0) 23/tcp open telnet NASLite-SMB/Sveasoft Alchemy firmware telnetd 53/tcp open domain dnsmasq 2.31 80/tcp open http Boa HTTPd 0.93.15 443/tcp open ssl/http Boa HTTPd 0.93.15 I have already tried a known vuln for Boa HTTPd 0.93.15 to bypass auth, but since the webapp is customized, that flaw is no longer available. At the moment I am trying to bruteforce ssh/telnet, but I guess it would not get any result. Overall, while continuing to disassemble and test it, If someone have some hints or material to share, is welcome. Cheers, Luca -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2.0.17 (Darwin) Comment: GPGTools - http://gpgtools.org iQIcBAEBAgAGBQJR/izEAAoJEPLE1Qsi6ZiTOBYP+wTEeqOYpUxULV24dF8FBu/W ZwL18Dw8zZAp2AEn7C4bGbajH/OAmrTz0Ae0a/jiZCxDEtN7MlF82+9cy8aQvQh/ xMeA3BiA9HlmDKJJO3fsCBoUNXXLIMt4/8F779qPtE2kNRGCkwafVkID93kU2qtA KGUsLeXHZyOzTbxtvwzxwQmAAyna3I2Z4jLzj3O61fpElR2CwFLSokcAqfYp1wNL gw/ofYZhBISqsCn403DMRcZTrfiO8YuqG0I3gdOtrrI2u2UPW3U6OGgtNi3Lz0Gn vLCeS5PMjrhdDKGGEd0IJRZu20QWKJVHUeksQ+fVI6o28TQ84bmvkohkuE8mhzYA rVPzva9+QJbGCHce0+UX3mSjtNl4Tsr1qJ6+useqQaa0KmHLR5SRMEBRAdvMAVQ7 5cgetujabmwyzeNtZECIxZlLmpfscm2ckiSYvnnH4gM3xhS0FZ6i3a5zSCdzCNHT RqFOlBLAUHopS9p5AoAQP5nWqK+xuj3iVWGq++pk6Q/aK7kvMNtlAIpQNhcDN236 9iHloZfeW/eIIBVhtNe6NEuAt4ry8hbeiuGjzJtAR+WAR/PwCtgdEQdOZnLD2LWV FhVNsGySrVvP63gZqhhsW8sUpP8IUaTzoKBgyZ7+fLDoRdqKFVcs+xhqzIfV5dm8 YumNguOR7GwCcAGgBW8g =d+QM -----END PGP SIGNATURE-----

12 years

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

OpenBSC August 2013