mgcp: Implement the "loopback" mode for a connection endpoint.
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@ -28,6 +28,15 @@
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#define CI_UNUSED 0
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enum mgcp_connection_mode {
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MGCP_CONN_NONE = 0,
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MGCP_CONN_RECV_ONLY = 1,
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MGCP_CONN_SEND_ONLY = 2,
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MGCP_CONN_RECV_SEND = MGCP_CONN_RECV_ONLY | MGCP_CONN_SEND_ONLY,
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MGCP_CONN_LOOPBACK = 4,
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};
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struct mgcp_endpoint {
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int ci;
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char *callid;
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@ -204,6 +204,10 @@ static int rtp_data_cb(struct bsc_fd *fd, unsigned int what)
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if (cfg->audio_loop)
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dest = !dest;
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/* Loop based on the conn_mode, maybe undoing the above */
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if (endp->conn_mode == MGCP_CONN_LOOPBACK)
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dest = !dest;
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if (dest == DEST_NETWORK) {
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if (proto == PROTO_RTP)
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patch_and_count(&endp->bts_seq_no, &endp->bts_lost_no,
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@ -38,13 +38,6 @@
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#include <openbsc/mgcp.h>
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#include <openbsc/mgcp_internal.h>
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enum mgcp_connection_mode {
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MGCP_CONN_NONE = 0,
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MGCP_CONN_RECV_ONLY = 1,
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MGCP_CONN_SEND_ONLY = 2,
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MGCP_CONN_RECV_SEND = MGCP_CONN_RECV_ONLY | MGCP_CONN_SEND_ONLY,
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};
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/**
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* Macro for tokenizing MGCP messages and SDP in one go.
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*
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@ -364,6 +357,8 @@ static int parse_conn_mode(const char* msg, int *conn_mode)
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*conn_mode = MGCP_CONN_RECV_ONLY;
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else if (strcmp(msg, "sendrecv") == 0)
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*conn_mode = MGCP_CONN_RECV_SEND;
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else if (strcmp(msg, "loopback") == 0)
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*conn_mode = MGCP_CONN_LOOPBACK;
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else {
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LOGP(DMGCP, LOGL_ERROR, "Unknown connection mode: '%s'\n", msg);
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ret = -1;
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