diff options
Diffstat (limited to 'src/libmsc/ran_msg_a.c')
| -rw-r--r-- | src/libmsc/ran_msg_a.c | 36 |
1 files changed, 33 insertions, 3 deletions
diff --git a/src/libmsc/ran_msg_a.c b/src/libmsc/ran_msg_a.c index ab5852660..1fa8ccbce 100644 --- a/src/libmsc/ran_msg_a.c +++ b/src/libmsc/ran_msg_a.c @@ -1275,20 +1275,50 @@ struct msgb *ran_a_encode(struct osmo_fsm_inst *caller_fi, const struct ran_msg return msg; } -/* Return 1 for a RESET, 2 for a RESET ACK message, 0 otherwise */ -enum reset_msg_type bssmap_is_reset_msg(const struct sccp_ran_inst *sri, const struct msgb *l2) +static void cl_parse_osmux(struct osmo_fsm_inst *log_fi, struct msgb *msg, int *supports_osmux) +{ + struct tlv_parsed tp; + int rc; + + if (supports_osmux == NULL) + return; + + rc = tlv_parse(&tp, gsm0808_att_tlvdef(), msgb_l3(msg) + 1, msgb_l3len(msg) - 1, 0, 0); + if (rc < 0) { + LOGPFSMSL(log_fi, DBSSAP, LOGL_ERROR, "BSSMAP: Failed parsing TLV looking for Osmux support\n"); + return; + } + + if (TLVP_PRESENT(&tp, GSM0808_IE_OSMO_OSMUX_SUPPORT)) { + *supports_osmux = true; + } else { + *supports_osmux = false; + } +} + +/* Return 1 for a RESET, 2 for a RESET ACK message, 0 otherwise. + * In supports_osmux, return 0 for no information, 1 for support detected, -1 for non-support detected. */ +enum reset_msg_type bssmap_is_reset_msg(const struct sccp_ran_inst *sri, struct osmo_fsm_inst *log_fi, + struct msgb *l2, int *supports_osmux) { struct bssmap_header *bs = (struct bssmap_header *)msgb_l2(l2); + if (supports_osmux != NULL) + *supports_osmux = 0; + if (!bs || msgb_l2len(l2) < (sizeof(*bs) + 1) || bs->type != BSSAP_MSG_BSS_MANAGEMENT) return SCCP_RAN_MSG_NON_RESET; - switch (l2->l2h[sizeof(*bs)]) { + l2->l3h = l2->l2h + sizeof(struct bssmap_header); + + switch (l2->l3h[0]) { case BSS_MAP_MSG_RESET: + cl_parse_osmux(log_fi, l2, supports_osmux); return SCCP_RAN_MSG_RESET; case BSS_MAP_MSG_RESET_ACKNOWLEDGE: + cl_parse_osmux(log_fi, l2, supports_osmux); return SCCP_RAN_MSG_RESET_ACK; default: return SCCP_RAN_MSG_NON_RESET; |