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C language framework FreeSwitch custom event introduction and usage example

2022-08-08 04:54:00 【Small coachman】

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文章目录

前言
1、FreeSwitch自定义事件
2、Configure dialup plan
3、fs_cli事件订阅
4、By calling the soft test and result output
总结

前言

We in the chapters beforeESLThe custom event subscription《【FreeSwitch开发实践】 ESL简介》,This paper introduced inFreeSwitchWriting a custom module,And define a custom event,然后发送事件、和用fs_cliIn the event subscription.

自定义事件,是在FreeSwitchStandard events such asAnswer、Hangup事件之外,Used to extend the event,在实际业务中,Can pass the custom events to some important results,如ASR的识别结果、Space to identify test results,通过ESL传输出来.

1、FreeSwitch自定义事件

先看代码：

switch_bool_t fire_my_event(switch_core_session_t* session)
{
    
	switch_event_t *event = NULL;
	
	const char* var = "my custom event";
	switch_channel_t *channel = switch_core_session_get_channel(session);

	if (switch_event_create_subclass(&event, SWITCH_EVENT_CUSTOM, "my_event_name") == SWITCH_STATUS_SUCCESS) {
    

		switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "Custom-Variable", var);
		switch_event_add_header_string(event, SWITCH_STACK_BOTTOM, "Unique-ID", 		     switch_core_session_get_uuid(session));
		switch_channel_event_set_data(channel, event);
		switch_event_fire(&event);
	}
	return SWITCH_TRUE;
}

fire_my_eventFunction definitions custom events、并设置事件参数、发送事件.
switch_event_create_subclass 定义事件, SWITCH_EVENT_CUSTOM为自定义事件, 事件名称my_event_name.
‘switch_event_add_header_string’ 添加事件参数, 为键值对,Appear in the subscribe to events in the body.
switch_event_fire 发送事件.

2、Configure dialup plan

本次示例,模块名称：myevent, 自定义事件名称：my_event_name·.

  <extension name="myevent-diaplan">
      <condition field="destination_number" expression="^10099$">
        <action application="answer"/>
        <action application="myevent"/>
        <action application="echo" data=""/>
        <action application="hangup" data=""/>
      </condition>
  </extension>

10099 Is the name of the dial plan.

3、fs_cli事件订阅

/event plain CUSTOM my_event_name

my_event_name 就是事件名称.

4、By calling the soft test and result output

By calling the soft test：

originate user/1000 10099

首先,需要注册1000软电话,参考《【FreeSwitch开发实践】使用SIP客户端Yate连接FreeSwitch进行VoIP通话》.
10099就是前面The dial plan defined names.

输出：

Event-Subclass: my_event_name
Event-Name: CUSTOM
Core-UUID: 25e79748-6092-4221-bf08-0ff2ff57baca
FreeSWITCH-Hostname: VM-8-10-centos
FreeSWITCH-Switchname: VM-8-10-centos
FreeSWITCH-IPv4: 10.0.8.10
FreeSWITCH-IPv6: fe80::5054:ff:fe58:28ea
Event-Date-Local: 2022-08-07 14:35:19
Event-Date-GMT: Sun, 07 Aug 2022 06:35:19 GMT
Event-Date-Timestamp: 1659854119135626
Event-Calling-File: mod_myevent.c
Event-Calling-Function: fire_my_event
Event-Calling-Line-Number: 58
Event-Sequence: 7236
Custom-Variable: my custom event
Unique-ID: 38ce44cd-d85d-46e2-a48e-be497e139f8a
Channel-State: CS_EXECUTE
Channel-Call-State: ACTIVE
Channel-State-Number: 4
Channel-Name: sofia/internal/[email protected]:33493
Unique-ID: 38ce44cd-d85d-46e2-a48e-be497e139f8a
Call-Direction: outbound
Presence-Call-Direction: outbound
Channel-HIT-Dialplan: true
Channel-Presence-ID: 1000@10.0.8.10
Channel-Call-UUID: 38ce44cd-d85d-46e2-a48e-be497e139f8a
Answer-State: answered
Channel-Read-Codec-Name: PCMU
Channel-Read-Codec-Rate: 8000
Channel-Read-Codec-Bit-Rate: 64000
Channel-Write-Codec-Name: PCMU
Channel-Write-Codec-Rate: 8000
Channel-Write-Codec-Bit-Rate: 64000
Caller-Direction: outbound
Caller-Logical-Direction: outbound
Caller-Dialplan: XML
Caller-Caller-ID-Name: Outbound Call
Caller-Caller-ID-Number: 1000
Caller-Orig-Caller-ID-Number: 0000000000
Caller-Callee-ID-Number: 0000000000
Caller-Network-Addr: 221.216.208.120
Caller-ANI: 0000000000
Caller-Destination-Number: 10099
Caller-Unique-ID: 38ce44cd-d85d-46e2-a48e-be497e139f8a
Caller-Source: src/switch_ivr_originate.c
Caller-Transfer-Source: 1659854119:38061f99-7fe0-4b03-9bdd-f0ca758622d3:bl_xfer:10099/default/XML
Caller-Context: default
Caller-RDNIS: 1000
Caller-Channel-Name: sofia/internal/[email protected]:33493
Caller-Profile-Index: 2
Caller-Profile-Created-Time: 1659854119135626
Caller-Channel-Created-Time: 1659854083475630
Caller-Channel-Answered-Time: 1659854119115643
Caller-Channel-Progress-Time: 1659854083535627
Caller-Channel-Progress-Media-Time: 0
Caller-Channel-Hangup-Time: 0
Caller-Channel-Transfer-Time: 0
Caller-Channel-Resurrect-Time: 0
Caller-Channel-Bridged-Time: 0
Caller-Channel-Last-Hold: 0
Caller-Channel-Hold-Accum: 0
Caller-Screen-Bit: true
Caller-Privacy-Hide-Name: false
Caller-Privacy-Hide-Number: false
variable_direction: outbound
variable_is_outbound: true
variable_uuid: 38ce44cd-d85d-46e2-a48e-be497e139f8a
variable_session_id: 16
variable_sip_profile_name: internal
variable_text_media_flow: disabled
variable_channel_name: sofia/internal/[email protected]:33493
variable_sip_destination_url: sip:[email protected]:33493
variable_dialed_user: 1000
variable_dialed_domain: 10.0.8.10
variable_sip_invite_domain: 10.0.8.10
variable_presence_id: 1000@10.0.8.10
variable_audio_media_flow: sendrecv
variable_local_video_ip: 10.0.8.10
variable_local_video_port: 21828
variable_video_media_flow: sendrecv
variable_rtp_local_sdp_str: v=0
o=FreeSWITCH 1659822373 1659822374 IN IP4 10.0.8.10
s=FreeSWITCH
c=IN IP4 10.0.8.10
t=0 0
m=audio 31710 RTP/AVP 9 0 8 101
a=rtpmap:9 G722/8000
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=ptime:20
a=sendrecv
m=video 21828 RTP/AVP 102
b=AS:3072
a=rtpmap:102 VP8/90000
a=sendrecv
a=rtcp-fb:102 ccm fir
a=rtcp-fb:102 ccm tmmbr
a=rtcp-fb:102 nack
a=rtcp-fb:102 nack pli

Can be seen in the custom event body event definitions of variablesCustom-Variable 、Unique-ID.

总结

Above is the content of this,主要介绍如下：

自定义事件的定义
The custom event variable Settings
拨号计划配置
fs_cliThe custom event subscription
By calling the soft test and subscribe to the custom event results

In this paper, code complete example download address
(The code download need integral,如果没有积分可以私信博主即可以免费获取)

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