osmith has uploaded this change for review. ( https://gerrit.osmocom.org/c/osmo-bsc/+/31542 )
Change subject: bssmap_handle_ass_req_ct_speech: split up ......................................................................
bssmap_handle_ass_req_ct_speech: split up
Allow reusing common code in an upcoming bssmap_handle_ass_req_ct_data. It won't use _osmux for now (maybe in the future?), but splitting it out as well makes it consistent.
Related: OS#4393 Change-Id: I4d9a4df314b1e56b9c1f90c9d7914332b70b56f8 --- M src/osmo-bsc/osmo_bsc_bssap.c 1 file changed, 92 insertions(+), 29 deletions(-)
git pull ssh://gerrit.osmocom.org:29418/osmo-bsc refs/changes/42/31542/1
diff --git a/src/osmo-bsc/osmo_bsc_bssap.c b/src/osmo-bsc/osmo_bsc_bssap.c index d0ff1cf..1a7c56e 100644 --- a/src/osmo-bsc/osmo_bsc_bssap.c +++ b/src/osmo-bsc/osmo_bsc_bssap.c @@ -796,28 +796,29 @@ return nc > 0 ? 0 : -EINVAL; }
-static int bssmap_handle_ass_req_ct_speech(struct gsm_subscriber_connection *conn, struct tlv_parsed *tp, - struct gsm0808_channel_type *ct, struct assignment_request *req, - uint8_t *cause) +static int bssmap_handle_ass_req_tp_cic(struct tlv_parsed *tp, bool aoip, uint16_t *cic, uint8_t *cause) { - uint16_t cic = 0; - bool aoip = gscon_is_aoip(conn); - bool use_osmux = false; - uint8_t osmux_cid = 0; - struct sockaddr_storage rtp_addr; - int rc; - if (TLVP_PRESENT(tp, GSM0808_IE_CIRCUIT_IDENTITY_CODE)) { /* CIC is permitted in both AoIP and SCCPlite */ - cic = osmo_load16be(TLVP_VAL(tp, GSM0808_IE_CIRCUIT_IDENTITY_CODE)); - } else { - if (!aoip) { - /* no CIC but SCCPlite: illegal */ - LOGP(DMSC, LOGL_ERROR, "SCCPlite MSC, but no CIC in ASSIGN REQ?\n"); - *cause = GSM0808_CAUSE_INFORMATION_ELEMENT_OR_FIELD_MISSING; - return -1; - } + *cic = osmo_load16be(TLVP_VAL(tp, GSM0808_IE_CIRCUIT_IDENTITY_CODE)); + return 0; } + + if (!aoip) { + /* no CIC but SCCPlite: illegal */ + LOGP(DMSC, LOGL_ERROR, "SCCPlite MSC, but no CIC in ASSIGN REQ?\n"); + *cause = GSM0808_CAUSE_INFORMATION_ELEMENT_OR_FIELD_MISSING; + return -1; + } + + return 0; +} + +static int bssmap_handle_ass_req_tp_rtp_addr(struct tlv_parsed *tp, bool aoip, struct sockaddr_storage *rtp_addr, + uint8_t *cause) +{ + int rc; + if (TLVP_PRESENT(tp, GSM0808_IE_AOIP_TRASP_ADDR)) { if (!aoip) { /* SCCPlite and AoIP transport address: illegal */ @@ -826,7 +827,7 @@ return -1; } /* Decode AoIP transport address element */ - rc = gsm0808_dec_aoip_trasp_addr(&rtp_addr, + rc = gsm0808_dec_aoip_trasp_addr(rtp_addr, TLVP_VAL(tp, GSM0808_IE_AOIP_TRASP_ADDR), TLVP_LEN(tp, GSM0808_IE_AOIP_TRASP_ADDR)); if (rc < 0) { @@ -834,7 +835,10 @@ *cause = GSM0808_CAUSE_INCORRECT_VALUE; return -1; } - } else if (aoip) { + return 0; + } + + if (aoip) { /* no AoIP transport level address but AoIP transport: illegal */ LOGP(DMSC, LOGL_ERROR, "AoIP transport address missing in ASSIGN REQ, " "audio would not work; rejecting\n"); @@ -842,14 +846,22 @@ return -1; }
+ return 0; +} + +static int bssmap_handle_ass_req_tp_osmux(struct gsm_subscriber_connection *conn, struct tlv_parsed *tp, + bool *use_osmux, uint8_t *osmux_cid, uint8_t *cause) +{ + int rc; + if (TLVP_PRESENT(tp, GSM0808_IE_OSMO_OSMUX_CID)) { if (conn->sccp.msc->use_osmux == OSMUX_USAGE_OFF) { LOGP(DMSC, LOGL_ERROR, "MSC using Osmux but we have it disabled.\n"); *cause = GSM0808_CAUSE_INCORRECT_VALUE; return -1; } - use_osmux = true; - rc = gsm0808_dec_osmux_cid(&osmux_cid, + *use_osmux = true; + rc = gsm0808_dec_osmux_cid(osmux_cid, TLVP_VAL(tp, GSM0808_IE_OSMO_OSMUX_CID), TLVP_LEN(tp, GSM0808_IE_OSMO_OSMUX_CID)); if (rc < 0) { @@ -857,15 +869,26 @@ *cause = GSM0808_CAUSE_INCORRECT_VALUE; return -1; } - } else { - if (conn->sccp.msc->use_osmux == OSMUX_USAGE_ONLY) { - LOGP(DMSC, LOGL_ERROR, "MSC not using Osmux but we are forced to use it.\n"); - *cause = GSM0808_CAUSE_INCORRECT_VALUE; - return -1; - } else if (conn->sccp.msc->use_osmux == OSMUX_USAGE_ON) - LOGP(DMSC, LOGL_NOTICE, "MSC not using Osmux but we have Osmux enabled.\n"); + return 0; }
+ if (conn->sccp.msc->use_osmux == OSMUX_USAGE_ONLY) { + LOGP(DMSC, LOGL_ERROR, "MSC not using Osmux but we are forced to use it.\n"); + *cause = GSM0808_CAUSE_INCORRECT_VALUE; + return -1; + } + + if (conn->sccp.msc->use_osmux == OSMUX_USAGE_ON) + LOGP(DMSC, LOGL_NOTICE, "MSC not using Osmux but we have Osmux enabled.\n"); + + return 0; +} + +static int bssmap_handle_ass_req_tp_codec_list(struct gsm_subscriber_connection *conn, struct tlv_parsed *tp, bool aoip, + uint8_t *cause) +{ + int rc; + /* Decode speech codec list. First set len = 0. */ conn->codec_list = (struct gsm0808_speech_codec_list){}; /* Check for speech codec list element */ @@ -888,6 +911,32 @@ return -1; }
+ return 0; +} + +static int bssmap_handle_ass_req_ct_speech(struct gsm_subscriber_connection *conn, struct tlv_parsed *tp, + struct gsm0808_channel_type *ct, struct assignment_request *req, + uint8_t *cause) +{ + uint16_t cic = 0; + bool aoip = gscon_is_aoip(conn); + bool use_osmux = false; + uint8_t osmux_cid = 0; + struct sockaddr_storage rtp_addr; + int rc; + + if (bssmap_handle_ass_req_tp_cic(tp, aoip, &cic, cause) < 0) + return -1; + + if (bssmap_handle_ass_req_tp_rtp_addr(tp, aoip, &rtp_addr, cause) < 0) + return -1; + + if (bssmap_handle_ass_req_tp_osmux(conn, tp, &use_osmux, &osmux_cid, cause) < 0) + return -1; + + if (bssmap_handle_ass_req_tp_codec_list(conn, tp, aoip, cause) < 0) + return -1; + *req = (struct assignment_request){ .assign_for = ASSIGN_FOR_BSSMAP_REQ, .aoip = aoip,
-
osmith