mgw: rx_rtp(): reorder checks and handlings
First validate the origin of the message, then later the content of the message and finally execute whatever triggers are necessary. This way contents from unknown senders are not even parsed or acted upon, avoiding useless potential harm. Change-Id: I011a6d7d705768c32a35cec5cd7169725a21a670
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@ -1514,7 +1514,9 @@ static int rx_rtp(struct msgb *msg)
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LOG_CONN_RTP(conn_src, LOGL_DEBUG, "rx_rtp(%u bytes)\n", msgb_length(msg));
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mgcp_conn_watchdog_kick(conn_src->conn);
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/* Check if the origin of the RTP packet seems plausible */
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if (!trunk->rtp_accept_all && check_rtp_origin(conn_src, from_addr))
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return -1;
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/* If AMR is configured for the ingress connection and conversion of the
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* framing mode (octet-aligned vs. bandwith-efficient) is explicitly
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@ -1534,9 +1536,7 @@ static int rx_rtp(struct msgb *msg)
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}
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}
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/* Check if the origin of the RTP packet seems plausible */
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if (!trunk->rtp_accept_all && check_rtp_origin(conn_src, from_addr))
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return -1;
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mgcp_conn_watchdog_kick(conn_src->conn);
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/* Execute endpoint specific implementation that handles the
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* dispatching of the RTP data */
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