概述
freeswitch是一款简单好用的VOIP开源软交换平台。
在之前的文章中,我们简单介绍过gateway的三种配置方案,但是实际应用之后发现,方案中的参数设置有缺陷,会导致一些问题。
本文档中,针对具体的gateway配置问题进行分析和解决。
环境
centos:CentOS release 7.0 (Final)或以上版本
freeswitch:v1.10.7
GCC:4.8.5
之前的gateway配置和问题
配置conf/sip_profile/external/gw-138-5080.xml,设置网关参数,例子中只列举了必须的参数,非注册模式。
<include>
<gateway name="gw-138-5080">
<param name="username" value="not-used"/>
<param name="realm" value="10.55.55.138:5080"/>
<param name="password" value="not-used"/>
<param name="register" value="false"/>
<!--send an options ping every x seconds, failure will unregister and/or mark it down-->
<param name="ping" value="20"/>
<param name="ping-min" value="3"/>
<param name="ping-max" value="6"/>
<param name="ping-user-agent" value="proxy"/>
</gateway>
</include>
在使用该网关发起呼叫的时候,会有三个问题。
问题一,gateway的invite消息的from头域“caller_id_number”字段内容错误。
From: "123456" <sip:[email protected]:5080;transport=udp;user=phone>;tag=Kpe5rrr9Nr9jK
问题二,网关参数"ping-user-agent"会导致fs刷新配置(reloadxml)的时候coredump。从core文件分析可以看到“sofia_reg_check_gateway”函数中的问题点。
(gdb) bt
#0 0x00007f430f3ac8c1 in __strlen_sse2_pminub () from /lib64/libc.so.6
#1 0x00007f4310d96974 in t_str_xtra () from /lib64/libsofia-sip-ua.so.0
#2 0x00007f4310d9764d in tl_xtra () from /lib64/libsofia-sip-ua.so.0
#3 0x00007f4310d3d990 in nua_signal () from /lib64/libsofia-sip-ua.so.0
#4 0x00007f4310d38830 in nua_options () from /lib64/libsofia-sip-ua.so.0
#5 0x00007f4308826bf9 in sofia_reg_check_gateway (profile=profile@entry=0xe027f0, now=1684490085) at sofia_reg.c:392
#6 0x00007f43087dac18 in sofia_profile_worker_thread_run (thread=<optimized out>, obj=0xe027f0) at sofia.c:3001
#7 0x00007f4312db2d50 in dummy_worker (opaque=0xe07080) at threadproc/unix/thread.c:151
#8 0x00007f430fce7ea5 in start_thread () from /lib64/libpthread.so.0
#9 0x00007f430f33bb0d in clone () from /lib64/libc.so.6
(gdb) f 5
#5 0x00007f4308826bf9 in sofia_reg_check_gateway (profile=profile@entry=0xe027f0, now=1684490085) at sofia_reg.c:392
392 nua_options(nh,
(gdb) l
387 switch_copy_string(pvt->gateway_name, gateway_ptr->name, sizeof(pvt->gateway_name));
388 nua_handle_bind(nh, pvt);
389
390 gateway_ptr->pinging = 1;
391 gateway_ptr->ping_sent = switch_time_now();
392 nua_options(nh,
393 TAG_IF(gateway_ptr->register_sticky_proxy, NUTAG_PROXY(gateway_ptr->register_sticky_proxy)),
394 TAG_IF(user_via, SIPTAG_VIA_STR(user_via)),
395 SIPTAG_TO_STR(gateway_ptr->options_to_uri), SIPTAG_FROM_STR(gateway_ptr->options_from_uri),
396 TAG_IF(gateway_ptr->contact_in_ping, SIPTAG_CONTACT_STR(gateway_ptr->register_contact)),
(gdb)
397 TAG_IF(gateway_ptr->options_user_agent, SIPTAG_USER_AGENT_STR(gateway_ptr->options_user_agent)),
398 TAG_END());
399
400 switch_safe_free(user_via);
401 user_via = NULL;
402 }
(gdb) p gateway_ptr->options_user_agent
$1 = 0x7f430adc3092 <Address 0x7f430adc3092 out of bounds>
问题三,options检测不够灵敏,自动切换时间较长,通过修改“ping-min”和“ping-max”参数的值,达到故障转移40秒内自动切换,故障恢复后40秒内切回。
新的gateway配置方法
vi gw-138-5080.xml
<include>
<gateway name="gw-138-5080">
<param name="realm" value="10.55.55.138:5080"/>
<param name="caller-id-in-from" value="true"/>
<param name="register" value="false"/>
<!--send an options ping every x seconds, failure will unregister and/or mark it down-->
<param name="ping" value="20"/>
<param name="ping-min" value="2"/>
<param name="ping-max" value="3"/>
</gateway>
</include>
新的参数在测试后验证成功,结果符合预期。
总结
freeswitch的gateway概念有多种类型和参数,需要在实际应用场景下测试验证。
gateway的参数详情请参考fs官网文档。
空空如常
求真得真
标签:sofia,ptr,gateway,user,freeswitch,lib64,优化,options From: https://www.cnblogs.com/qiuzhendezhen/p/17451954.html