diff options
Diffstat (limited to 'src/gsm')
| -rw-r--r-- | src/gsm/gsm0808.c | 28 | ||||
| -rw-r--r-- | src/gsm/gsm0808_utils.c | 26 | ||||
| -rw-r--r-- | src/gsm/libosmogsm.map | 1 |
3 files changed, 43 insertions, 12 deletions
diff --git a/src/gsm/gsm0808.c b/src/gsm/gsm0808.c index c0d5f39d..e951ab1f 100644 --- a/src/gsm/gsm0808.c +++ b/src/gsm/gsm0808.c @@ -141,7 +141,7 @@ struct msgb *gsm0808_create_reset(void) return NULL; msgb_v_put(msg, BSS_MAP_MSG_RESET); - msgb_tlv_put(msg, GSM0808_IE_CAUSE, 1, &cause); + gsm0808_enc_cause(msg, cause); msg->l3h = msgb_tv_push(msg, BSSAP_MSG_BSS_MANAGEMENT, msgb_length(msg)); return msg; @@ -190,7 +190,7 @@ struct msgb *gsm0808_create_clear_command(uint8_t cause) msg->l3h = msgb_tv_put(msg, BSSAP_MSG_BSS_MANAGEMENT, 4); msgb_v_put(msg, BSS_MAP_MSG_CLEAR_CMD); - msgb_tlv_put(msg, GSM0808_IE_CAUSE, 1, &cause); + gsm0808_enc_cause(msg, cause); return msg; } @@ -273,7 +273,7 @@ struct msgb *gsm0808_create_cipher_reject(enum gsm0808_cause cause) msgb_v_put(msg, BSS_MAP_MSG_CIPHER_MODE_REJECT); - msgb_tlv_put(msg, GSM0808_IE_CAUSE, 1, (const uint8_t *)&cause); + gsm0808_enc_cause(msg, cause); msg->l3h = msgb_tv_push(msg, BSSAP_MSG_BSS_MANAGEMENT, msgb_length(msg)); @@ -286,18 +286,22 @@ struct msgb *gsm0808_create_cipher_reject(enum gsm0808_cause cause) * \returns callee-allocated msgb with BSSMAP Cipher Mode Reject message */ struct msgb *gsm0808_create_cipher_reject_ext(enum gsm0808_cause_class class, uint8_t ext) { - uint8_t c[2]; + uint16_t cause; struct msgb *msg = msgb_alloc_headroom(BSSMAP_MSG_SIZE, BSSMAP_MSG_HEADROOM, "bssmap: cipher mode reject"); if (!msg) return NULL; - c[0] = 0x80 | (class << 4); /* set the high bit to indicate extended cause */ - c[1] = ext; + /* Set cause code class in the upper byte */ + cause = 0x80 | (class << 4); + cause = cause << 8; + + /* Set cause code extension in the lower byte */ + cause |= ext; msgb_v_put(msg, BSS_MAP_MSG_CIPHER_MODE_REJECT); - msgb_tlv_put(msg, GSM0808_IE_CAUSE, 2, c); + gsm0808_enc_cause(msg, cause); msg->l3h = msgb_tv_push(msg, BSSAP_MSG_BSS_MANAGEMENT, msgb_length(msg)); @@ -572,7 +576,7 @@ struct msgb *gsm0808_create_ass_fail(uint8_t cause, const uint8_t *rr_cause, return NULL; msgb_v_put(msg, BSS_MAP_MSG_ASSIGMENT_FAILURE); - msgb_tlv_put(msg, GSM0808_IE_CAUSE, 1, &cause); + gsm0808_enc_cause(msg, cause); /* RR cause 3.2.2.22 */ if (rr_cause) @@ -614,7 +618,7 @@ struct msgb *gsm0808_create_clear_rqst(uint8_t cause) return NULL; msgb_v_put(msg, BSS_MAP_MSG_CLEAR_RQST); - msgb_tlv_put(msg, GSM0808_IE_CAUSE, 1, &cause); + gsm0808_enc_cause(msg, cause); msg->l3h = msgb_tv_push(msg, BSSAP_MSG_BSS_MANAGEMENT, msgb_length(msg)); return msg; @@ -751,7 +755,7 @@ struct msgb *gsm0808_create_handover_required(const struct gsm0808_handover_requ msgb_v_put(msg, BSS_MAP_MSG_HANDOVER_REQUIRED); /* Cause, 3.2.2.5 */ - msgb_tlv_put(msg, GSM0808_IE_CAUSE, params->cause & 0x80? 2 : 1, (const uint8_t*)¶ms->cause); + gsm0808_enc_cause(msg, params->cause); /* Cell Identifier List, 3.2.2.27 */ gsm0808_enc_cell_id_list2(msg, ¶ms->cil); @@ -876,7 +880,7 @@ struct msgb *gsm0808_create_handover_failure(const struct gsm0808_handover_failu msgb_v_put(msg, BSS_MAP_MSG_HANDOVER_FAILURE); /* Cause, 3.2.2.5 */ - msgb_tlv_put(msg, GSM0808_IE_CAUSE, params->cause & 0x80? 2 : 1, (const uint8_t*)¶ms->cause); + gsm0808_enc_cause(msg, params->cause); /* RR Cause, 3.2.2.22 */ if (params->rr_cause_present) @@ -907,7 +911,7 @@ struct msgb *gsm0808_create_handover_performed(const struct gsm0808_handover_per msgb_v_put(msg, BSS_MAP_MSG_HANDOVER_PERFORMED); /* Cause, 3.2.2.5 */ - msgb_tlv_put(msg, GSM0808_IE_CAUSE, gsm0808_cause_ext(params->cause) ? 2 : 1, (const uint8_t *)¶ms->cause); + gsm0808_enc_cause(msg, params->cause); /* Cell Identifier, 3.2.2.17 */ gsm0808_enc_cell_id(msg, ¶ms->cell_id); diff --git a/src/gsm/gsm0808_utils.c b/src/gsm/gsm0808_utils.c index c58d8284..38a8664c 100644 --- a/src/gsm/gsm0808_utils.c +++ b/src/gsm/gsm0808_utils.c @@ -48,6 +48,32 @@ * \file gsm0808_utils.c */ +/*! Encode TS 08.08 AoIP Cause IE + * \param[out] msg Message Buffer to which to append IE + * \param[in] cause Cause code to be used in IE + * \returns number of bytes added to \a msg */ +uint8_t gsm0808_enc_cause(struct msgb *msg, uint16_t cause) +{ + /* See also 3GPP TS 48.008 3.2.2.5 Cause */ + uint8_t *old_tail; + bool extended; + + old_tail = msg->tail; + + extended = gsm0808_cause_ext(cause >> 8); + + msgb_put_u8(msg, GSM0808_IE_CAUSE); + if (extended) { + msgb_put_u8(msg, 2); + msgb_put_u16(msg, cause); + } else { + msgb_put_u8(msg, 1); + msgb_put_u8(msg, (uint8_t) (cause & 0xFF)); + } + + return (uint8_t) (msg->tail - old_tail); +} + /*! Encode TS 08.08 AoIP transport address IE * \param[out] msg Message Buffer to which to append IE * \param[in] ss Socket Address to be used in IE diff --git a/src/gsm/libosmogsm.map b/src/gsm/libosmogsm.map index e9a9e4f2..dc4e0a69 100644 --- a/src/gsm/libosmogsm.map +++ b/src/gsm/libosmogsm.map @@ -183,6 +183,7 @@ gsm0808_create_handover_complete; gsm0808_create_handover_failure; gsm0808_create_handover_performed; gsm0808_prepend_dtap_header; +gsm0808_enc_cause; gsm0808_enc_aoip_trasp_addr; gsm0808_dec_aoip_trasp_addr; gsm0808_enc_speech_codec; |