diff options
author | Holger Hans Peter Freyther <zecke@selfish.org> | 2009-10-09 07:08:11 +0200 |
---|---|---|
committer | Holger Hans Peter Freyther <zecke@selfish.org> | 2009-11-20 14:05:04 +0100 |
commit | f67945f0047d62ca546afbd74def30adfc9e2f89 (patch) | |
tree | 9e970c424d60e5c00a1c6cc284934add68b3b53e /openbsc/include | |
parent | b1b0bc2ace9ec3e4bb3226af29eb88007ed8f12c (diff) |
[mgcp] Add a simple mgcp gateway used for the BSC
The python script is a simple call-agent driving the
client. Currently it is sending a AuditEndpoint message
and is printing the result.
The bsc_mgcp.c is a standalone process that will implement
a MGCP Gateway for the MSC. On call handling the Call-Agent
will ask the Gateway to "CreateConnection" and then this
gateway needs to communicate with OpenBSC.
Currently CreateConnection,ModifiyConnection,DeleteConnection
and Endpoint auditing is implemented.
[mgcp] Send RSIP on start and on first receive of any message
Ignore the first request and send a RSIP. We do that because
we might tunnel UDP through some other things and have no direct
way to connect to the call-agent.
Also the transaction is not checked and we ignore the response
from the call-agent, actually we print the '200 ' or any other
value as unhandled...
[mgcp] Print the MGCP command next to the response code
This allows to see which commands were sent by the server
mgcp: Terminate it with a new line
[mgcp] Make number of endpoints static...
For now this is fixed to the number of endpoints as of the GSM
specification...
[mgcp] The endpoint names seem to be base 16... use strtoul to parse
Use strtoul to parse the base 16 number from the mgw string.
[mgcp] Log the endpoints as hex numbers...
[mgcp] Only send the RSIP on the first incoming message..
Remove call_agent option (also remove the number from the getopt
call).
[mgcp] Start couting at 1 for the mgcp
[mgcp] Slight attempt to improve the grammar of the strings
[mgcp] Share validation routines between DLCX and MDCX
[mgcp] Remove help for dead config options
[mgcp] Specify a different IN addr in the SDP records
In case of NAT traversal be able to listen on a given
interface (like 127.0.0.1) but claim to receive data
at the beginning of the tunnel.
[mgcp] Fix the static copy of the SDP file
WIP verify out factoring broken..
[mgcp] Introduce VTY to the mgcp for config file parsing...
Parse the MGCP config file via the VTY framework.
[mgcp] Handle SDP parameters through VTY..
Currently the payload type, name and rate can be specified
in the config file.
[mgcp] Add an option to bind all rtp ports early
This can be useful for testing and in deployment to make sure
no runtime resource limit can be hit.
[mgcp] Add some API doc comment
[mgcp] Convert the packets of the example server to ascii
This will allow to easily patch the call id... to run the
server in a loop and make it work with the mediagateway
[mgcp] Assign CI_UNUSED... to be more obvious...
[mgcp] Use DEBUG and not DEBUGPC and specially not printf
Improve the logging a bit in the mgcp
[mgcp] Change the fake server to change the call id
This assume the call-agent will just increment the id
as well.... this is true for our implementation
[mgcp] Generate the transaction id dynamically..
This way wireshark will be more happy about it...
[mgcp] Recognize responses from the network..
This is just recognizing the response code and
then is doing nothing with it. Also change the
script to generate response messages...
[mgcp] Improve debug messages for CRCX/MDCX..
Log on which ports the media gateway is listening
and where the other (server) gateway is located
Diffstat (limited to 'openbsc/include')
-rw-r--r-- | openbsc/include/openbsc/mgcp.h | 48 | ||||
-rw-r--r-- | openbsc/include/vty/command.h | 1 |
2 files changed, 49 insertions, 0 deletions
diff --git a/openbsc/include/openbsc/mgcp.h b/openbsc/include/openbsc/mgcp.h new file mode 100644 index 000000000..fa6224c12 --- /dev/null +++ b/openbsc/include/openbsc/mgcp.h @@ -0,0 +1,48 @@ +/* A Media Gateway Control Protocol Media Gateway: RFC 3435 */ + +/* + * (C) 2009 by Holger Hans Peter Freyther <zecke@selfish.org> + * (C) 2009 by on-waves.com + * All Rights Reserved + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + * + */ + +unsigned int rtp_base_port = 4000; + +/** + * Calculate the RTP audio port for the given multiplex + * and the direction. This allows a semi static endpoint + * to port calculation removing the need for the BSC + * and the MediaGateway to communicate. + * + * Port usage explained: + * base + (multiplex * 2) + 0 == local port to wait for network packets + * base + (multiplex * 2) + 1 == local port for rtcp + * + * The above port will receive packets from the BTS that need + * to be patched and forwarded to the network. + * The above port will receive packets from the network that + * need to be patched and forwarded to the BTS. + * + * We assume to have a static BTS IP address so we can differentiate + * network and BTS. + * + */ +int rtp_calculate_port(int multiplex, int base) +{ + return base + (multiplex * 2); +} diff --git a/openbsc/include/vty/command.h b/openbsc/include/vty/command.h index 9daa2d62d..10a60add5 100644 --- a/openbsc/include/vty/command.h +++ b/openbsc/include/vty/command.h @@ -106,6 +106,7 @@ enum node_type { TRX_NODE, TS_NODE, SUBSCR_NODE, + MGCP_NODE, }; /* Node which has some commands and prompt string and configuration |