背景介绍

dialplan 主要用于号码转换,规则匹配替换等. 必须依赖数据库，从数据库读取规则。

kamailio 的版本:

version: kamailio 5.8.5 (x86_64/linux)

参数解析

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# 指定数据库地址
modparam("dialplan", "db_url", DBURL)
# 获取表字段attrs存储的的变量
modparam("dialplan", "attrs_pvar", "$avp(s:dest)")
# dialplain 是否动态匹配 
modparam("dialplan", "match_dynamic", 1)
# 重新加载的延迟时间,默认5s
modparam("dialplan", "reload_delta", 1)

重要函数

dp_replace(dpid, inval, outvar)

根据dpid规则,把inval替换成dpid表达式下的数据存储在outvar中.

dp_match(dpid, inval)

根据dpid规则匹配inval

dp_translate(id, [src[/dest]])

根据id规则转换src成dest,如果没有dest,只匹配src,并存储attrs到$avp(s:dest)里。此id还是dpid

实战

构造数据

1. 表结构

   name	type	size	default	null	key	extra attributes	description
   id	unsigned int	10		no	primary	auto increment	unique ID
   dpid	int	11		no			Dialplan ID
   pr	int	11		no			Priority of rule
   match_op	int	11		no			Matching operator for rule (0-equal, 1-regexp)
   match_exp	string	64		no			Matching expression (regexp or string)
   match_len	int	11		no			Length of the matching expression (used only for equal operator)
   subst_exp	string	64		no			Substitution expression
   repl_exp	string	256		no			Replacement expression (sed like)
   attrs	string	64		no			General attributes string to be returned in case of rule matching

所有的字段都要填写

2. 数据

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INSERT INTO `dialplan` VALUES (1,100,10,0,'1004',0,'1004','200$fU','test');`

配置示例

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loadmodule "dialplan.so"
modparam("dialplan", "db_url", DBURL)
modparam("dialplan", "attrs_pvar", "$avp(s:dest)")
modparam("dialplan", "match_dynamic", 1)
modparam("dialplan", "reload_delta", 1)
...
request_route {
        ...
        dp_replace("100", "$fU", "$var(newru)");
        xlog("L_INFO","$fU:$var(newru), $avp(s:dest)\n");
        # per request initial checks
        route(REQINIT);
        ...
}

目前使用的规则是号码添加前缀200, 实际效果打印的日志为:

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<script>: 1004:2001004, test