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e6d8e91b3a
The format is CRCX ... C: ... M: ... X-Osmo-IGN: C So far the only ignorable element is C, i.e. the CallID. Any other items may be added in the future. (I initially intended to also add '@' to ignore the endpoint name's domain part, but in the osmo-mgw code base the domain part is verified long before any additional headers are even parsed, so sparing that refactoring for now.) The intention is that osmo-bsc will issue "X-Osmo-IGN: C" for all SCCPlite calls, because we are unable to retrieve the CallID that the MSC sends to osmo-mgw for the network side of the endpoint. Testing with a specific SCCPlite MSC, I actually observe that all CallIDs are 1, even for concurrent calls. So, an alternative hacky solution would have been to always pass CallID == 1 for SCCPlite connections from osmo-bsc. Related: I257ad574d8060fef19afce9798bd8a5a7f8c99fe (osmo-bsc) Change-Id: Id7ae275ffde8ea9389270cfe3db087ee8db00b51
58 lines
2.2 KiB
C
58 lines
2.2 KiB
C
#pragma once
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#include <osmocom/mgcp_client/mgcp_common.h>
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#include <osmocom/mgcp_client/mgcp_client.h>
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#include <osmocom/gsm/protocol/gsm_04_08.h>
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/*! This struct organizes the connection infromation one connection side
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* (either remote or local). It is used to pass parameters (local) to the FSM
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* and get responses (remote) from the FSM as pointer attached to the FSM
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* event.
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*
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* When modifiying a connection, the endpoint and call_id members may be left
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* unpopulated. The call_id field is ignored in this case. If an endpoint
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* identifier is supplied it is checked against the internal state to make
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* sure it is correct. */
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struct mgcp_conn_peer {
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/*! RTP connection IP-Address (optional, string e.g. "127.0.0.1") */
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char addr[INET_ADDRSTRLEN];
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/*! RTP connection IP-Port (optional) */
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uint16_t port;
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/*! RTP endpoint */
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char endpoint[MGCP_ENDPOINT_MAXLEN];
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/*! CALL ID (unique per connection) */
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unsigned int call_id;
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/*! RTP packetization interval (optional) */
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unsigned int ptime;
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/*! RTP codec list (optional) */
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enum mgcp_codecs codecs[MGCP_MAX_CODECS];
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/*! Number of codecs in RTP codec list (optional) */
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unsigned int codecs_len;
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/*! RTP payload type map (optional, only needed when payload types are
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* used that differ from what IANA/3GPP defines) */
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struct ptmap ptmap[MGCP_MAX_CODECS];
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/*! RTP payload type map length (optional, only needed when payload
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* types are used that differ from what IANA/3GPP defines) */
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unsigned int ptmap_len;
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/*! If nonzero, send 'X-Osmo-IGN:' header. This is useful e.g. for SCCPlite MSCs where the MSC is
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* known to issue incoherent or unknown CallIDs / to issue CRCX commands with a different domain
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* name than the BSC. An OsmoMGW will then ignore these and not fail on mismatches. */
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uint32_t x_osmo_ign;
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};
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struct osmo_fsm_inst *mgcp_conn_create(struct mgcp_client *mgcp, struct osmo_fsm_inst *parent_fi, uint32_t parent_term_evt,
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uint32_t parent_evt, struct mgcp_conn_peer *conn_peer);
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int mgcp_conn_modify(struct osmo_fsm_inst *fi, uint32_t parent_evt, struct mgcp_conn_peer *conn_peer);
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void mgcp_conn_delete(struct osmo_fsm_inst *fi);
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const char *mgcp_conn_get_ci(struct osmo_fsm_inst *fi);
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