[Asterisk-Dev] Patch to support MGCP RSIP keepalive

[John Laur]

Attached is a small patch to chan_mgcp.c to support keepalive requests
as generated by Cisco devices (7960 and ATA-186) running MGCP (and
possibly other MGCP devices). These are used by the devices to keep NAT
tunnels open, but the request comes as an RSIP, and without this patch,
* will drop the connection when it gets the RSIP keepalive request in
the middle of a call.

Request comes in like this:

MGCP read:
RSIP 61 d001 at XXXXXXXXXXXX MGCP 1.0
RM: X-keepalive

from 68.109.XXX.XXX:2727Verb: 'RSIP', Identifier: '61', Endpoint:
'd001 at XXXXXXXXXXXX', Version: 'MGCP 1.0'
2 headers, 0 lines

John
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