Rtpengine
Overview
RTPEngine 내용 정리.
Basic
RTPEngine 은 RTP media stream proxy 서버이다.
Installation
Required packages
pkg-config GLib including GThread and GLib-JSON version 2.x zlib OpenSSL PCRE library XMLRPC-C version 1.16.08 or higher hiredis library gperf libcurl version 3.x or 4.x libevent version 2.x libpcap libsystemd spandsp MySQL or MariaDB client library (optional for media playback and call recording daemon) libiptc library for iptables management (optional) ffmpeg codec libraries for transcoding (optional) such as libavcodec, libavfilter, libswresample bcg729 for full G.729 transcoding support (optional)
추가적으로 다음의 패키지들도 필요하다.
libconfig-tiny-perl module-assistant libxmlrpc-c++8-dev linux-*-$(uname -r)
때때로 아래와 같은 에러가 나오면서 실행이 안되는 경우가 있는데, 이럴땐, linux-*-$(uname -r) 패키지 설치 후 다시 빌드를 진행하면 해결된다.
[1581510173.595075] ERR: FAILED TO CREATE KERNEL TABLE 0 (No such file or directory), KERNEL FORWARDING DISABLED [1581510173.595925] CRIT: Fatal error: Failed to open UDP control connection port
Kernel Module
The kernel module supports multiple forwarding tables which are identified through their ID number. By default, up to 64 forwarding tables can be created and used, giving them the ID numbers 0 through 63.
Each forwarding table can be thought of a separated proxy instance. Each running instance of the rtpengine daemon controls one such table, and each table can only be controlled by one running instance of the daemon at any given time. In the most common setup, there will be only a single instance of the daemon running and there will be only a single forward table in use, with ID zero.
The kernel module can be loaded with the command.
$ modprove xt_RTPENGINE
With the module loaded, a new directory will appear in /proc, namely /proc/rtpengine/. After loading, the directory will contain only two pseudo-fils, control and list. The control file is write-only and is used to create and delete forwarding tables, while the list file is read-only and will produce a list of currently active forwarding tables. With no tables active, it will produce an empty output.
The control pseudo-file supports to commands, add and del, each followed by the forwarding table ID number. To manually create a forwarding. table with ID 42, the following command can be used.
$ echo 'add 42' > /proc/rtpengine/control
After this, the list pseudo-filie will produce the single line 42 as output. This will also create a directory called 42 in /proc/rtpengine/, which contains additional pseudo-files to control this particular forwarding table.
To delete this forwarding table, the command 'del 42' can be issued like above. This will only if no rtpengine daemon is currently running and controlling this table.
Each subdirectory /proc/rtpengine/$ID/ corresponding to each forwarding table contains the pseudo-files blast, control, list and status. The control file is write-only while the others are read-only. The control file will be kept open by the rtpengine daemon while it's running
Control scripts
rtpengine-ctl
$ ./rtpengine-ctl
rtpengine-ctl [ -ip <ipaddress>[:<port>] -port <port> ] <command>
Supported commands are:
list [ numsessions | maxsessions | maxopenfiles | sessions [ <callid> | all | own | foreign ] | totals | loglevel ]
numsessions : print the number of sessions
maxsessions : print the number of allowed sessions
maxopenfiles : print the number of allowed open files
sessions <callid> : print detail about one session
sessions all : print one-liner all sessions information
sessions own : print one-liner own sessions information
sessions foreign : print one-liner foreign sessions information
totals : print total statistics
timeout : print timeout parameter
silenttimeout : print silent-timeout parameter
finaltimeout : print final-timeout parameter
loglevel : print current log level
redisallowederrors : print redis-allowed-errors parameter
redisdisabletime : print redis-disable-time parameter
redisconnecttimeout : print redis-connect-timeout parameter
rediscmdtimeout : print redis-cmd-timeout parameter
controltos : print control-tos parameter
get : get is an alias for list, same parameters apply
terminate [ <callid> | all | own | foreign ]
<callid> : session is immediately terminated
all : terminates all current sessions
own : terminates own current sessions
foreign : terminates foreign current sessions
set [ maxsessions <int> | maxopenfiles <uint> | timeout <uint> | silent_timeout <uint> | final_timeout <uint> | loglevel <uint> ]
maxsessions <int> : set the max nr of allowed sessions
maxopenfiles <uint> : set the max nr of allowed open files
timeout <uint> : set the --timeout parameter
silenttimeout <uint> : set the --silent-timeout parameter
finaltimeout <uint> : set the --final-timeout parameter
loglevel <uint> : set the log level to new value (1-7)
redisallowederrors : set the --redis-allowed-errors parameter
redisdisabletime : set the --redis-disable-time parameter
redisconnecttimeout : set the --redis-connect-timeout parameter
rediscmdtimeout : set the --redis-cmd-timeout parameter
controltos : set the --control-tos parameter
params [ start | current | diff ]
start : lists the initial values of all the configuration file parameters
current : lists the present values of all the configuration file parameters
diff : compares initial and present values of all the configuration file parameters and lists the updated parameters
revert : reverts the values of all the configuration file parameters to their initial values
ksadd [ keyspace <uint>]
keyspace <uint> : subscribe to 'keyspace' database
ksrm [ keyspace <uint>]
keyspace <uint> : unsubscribe to 'keyspace' database
: remove all foreign calls for that 'keyspace'
kslist : print all currently subscribed keyspaces
Return Value:
0 on success with output from server side, other values for failure.