openser from an asterisk pov

7/29/2019 OpenSER From an Asterisk POV

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OpenSER


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OpenSER

from an asterisk point of view


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What is OpenSER?


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OpenSER is:


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OpenSER is:

- a SIP proxy


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OpenSER is:

- a SIP proxy

- a SIP registrar


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OpenSER is:

- a SIP proxy

- a SIP registrar- a SIP router


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OpenSER is:

- a SIP proxy

- a SIP registrar- a SIP router- a SIP redirect server


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OpenSER is:

- a SIP proxy

- a SIP registrar- a SIP router- a SIP redirect server- a SIP application server


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OpenSER is not:


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OpenSER is not:

- a B2BUA (back to back user agent)


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OpenSER is not:

- a B2BUA (back to back user agent)- a media server


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OpenSER is not:

- a B2BUA (back to back user agent)- a media server- a soft phone


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OpenSER architecture:


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two main logical components


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core modules (plug-ins)


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core

parsers (SIP/SDP/conf)

modules (plug-ins)


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core


memory system

modules (plug-ins)


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core


memory system

transport layer

modules (plug-ins)


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core


memory system

transport layer

database interface

modules (plug-ins)


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core


memory system

transport layer

database interface synch/lock mechanism

modules (plug-ins)


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core


memory system

transport layer

database interface

synch/lock mechanism

management interface

modules (plug-ins)


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core


memory system

transport layer

database interface



script variables

modules (plug-ins)


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core


memory system

transport layer

database interface



script variables

modules (plug-ins)

SIP protocol (tm)


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core


memory system

transport layer

database interface



script variables

modules (plug-ins)

SIP protocol (tm)

features


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core

module 1

module 2

module n


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OpenSER configuration:


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openser.cfg


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openser.cfg (three blocks)


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global options


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global options

modules:loading and parameters


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global options

modules:loading and parameters

routing


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global options


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global options

- listen interfaces


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global options

- listen interfaces

# UDP supportlisten=udp:10.10.10.10:5060


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global options

- listen interfaces

# TCP supportlisten=tcp:10.10.10.10:5070


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global options

- listen interfaces

# TLS support (port 5061)listen=tls:10.10.10.10


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global options

- listen interfaces

- logging


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global options

- listen interfaces

- logging

# logging leveldebug=3

O SER fi i


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global options

- listen interfaces

- logging

# syslog enabledlog_stderr=no

O SER fi ti


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global options

- listen interfaces

- logging


log_facility=LOG_LOCAL3

O SER fi ti


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global options

- listen interfaces

- logging


log_facility=LOG_LOCAL3log_name=oser

O SER fi ti


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global options

- listen interfaces

- logging- number of processes

O SER fi ti


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global options

- listen interfaces


fork=yes

O SER fi ti


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global options

- listen interfaces


fork=yes

children=6 # UDP listeners



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global options

- listen interfaces


fork=yes

children=6 # UDP listenerstcp_children=5 #TCP listeners



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global options

- listen interfaces

- logging- number of processes- protocol control



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global options

- listen interfaces


disable_tcp=yes



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global options

- listen interfaces


disable_tcp=yesdisable_tls=yes



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global options

# Please refer to the Core CookBook at http://www.openser.org/dokuwiki/doku.php# for a explanation of possible statements, functions and parameters.#

####### Global Parameters #########

debug=3log_stderror=nolog_facility=LOG_LOCAL0

fork=yes

children=4

disable_tcp=yes

listen=udp:192.168.1.2:5060



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modules (loading and parameters)



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- path location



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- path location

mpath=/usr/lib/openser/modules



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- path location

- module loading



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- path location

- module loading

mpath=/usr/lib/openser/modulesloadmodule tm.so



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- path location

- module loading

loadmodule /usr/lib/openser/modules/tm.so



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- path location

- module loading- module parameters



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- path location

- module loading- module parametersmodparam(tm,T1_timer,700)



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####### Modules Section ########

# set module path

mpath="/usr/local/lib/openser/modules/"

loadmodule "sl.so"

loadmodule "tm.so"

loadmodule "rr.so"

loadmodule "maxfwd.so"

loadmodule "mi_fifo.so"modparam("mi_fifo", "fifo_name", "/tmp/openser_fifo")



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routing



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Ope S co gu a o

routing

- request route: route[n] {...}



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p g

routing

- request route: route[n] {...}- provisional reply route: onreply_route[m] {...}



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p g

routing

- request route: route[n] {...}- provisional reply route: onreply_route[m] {...}- failure reply route: failure_route[p] {...}



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p g

routing

- request route: route[n] {...}- provisional reply route: onreply_route[m] {...}- failure reply route: failure_route[p] {...}- request branch route: branch_route[q] {...}



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p g

routing

- request route: route[n] {...}- provisional reply route: onreply_route[m] {...}- failure reply route: failure_route[p] {...}- request branch route: branch_route[q] {...}- error route: error_route {...}



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p g

routing

####### Routing Logic ########route{

if (loose_route()) { # mark routing logic in requestappend_hf("P-hint: rr-enforced\r\n");

t_relay();exit;;};if (!uri==myself) { # mark routing logic in request

append_hf("P-hint: outbound\r\n");t_relay();exit;

};if (uri==myself && is_method("INVITE")) {lookup(location);t_relay();exit;

};}



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Read from the network

SIP message call flow

Message parsing

route on_reply_route/failure_route

Processing (core/module functions)

Send to network

SIP request SIP reply



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http://openser.org/http://openser.org/docs/http://openser.org/dokuwiki/doku.php

http://old.iptel.org/ser/doc/seruser/seruser.html

OpenSER/asterisk integration
http://openser.org/http://openser.org/docs/http://openser.org/dokuwiki/doku.phphttp://old.iptel.org/ser/doc/seruser/seruser.htmlhttp://old.iptel.org/ser/doc/seruser/seruser.htmlhttp://openser.org/dokuwiki/doku.phphttp://openser.org/docs/http://openser.org/


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OpenSER

asteriskasterisk

asterisk

- registrar/dispatcher for asterisk farm

location db



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OpenSERasterisk

asterisk

asterisk

- SIP router for asterisk farm

carrier 1

carrier 2

carrier 3

high # of channelshigh cps rate

low # of channelslow cps rate

high # of channelsmedium cps rate



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OpenSERasterisk

asterisk

asterisk

- SIP router for asterisk farm

carrier 1

carrier 2

carrier 3

national

international

911

Q&A


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Thank you

[email protected]

openser from an asterisk pov

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