分享fred的kamailio脚本

## 来源：https://github.com/fredposner/scripts/blob/master/kamailio/mid-registrar.cfg

#!KAMAILIO
#
# Edge proxy configuration
# mid-registrar example
#

#!substdef "!REGISTRAR_IP!a.b.c.d!g"
#!substdef "!REGISTRAR_PORT!5060!g"
#!substdef "!MY_DOMAIN!whatever.net!g"
#!substdef "!MY_IP_ADDR!e.f.g.h!g"
#!substdef "!MY_PUBLIC_IP!i.j.k.l!g"

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

debug=2
log_stderror=no
log_facility=LOG_LOCAL0
log_prefix="{$mt $hdr(CSeq) $ci} "
fork=yes
children=2 #-- use one per core
listen=MY_IP_ADDR advertise MY_PUBLIC_IP:5060
alias="MY_DOMAIN"
alias="MY_PUBLIC_IP"
force_rport=yes


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

loadmodule "jsonrpcs.so"
loadmodule "tm.so"
loadmodule "tmx.so"
loadmodule "sl.so"
loadmodule "outbound.so"
loadmodule "rr.so"
loadmodule "path.so"
loadmodule "pv.so"
loadmodule "maxfwd.so"
loadmodule "xlog.so"
loadmodule "sanity.so"
loadmodule "ctl.so"
loadmodule "textops.so"
loadmodule "corex.so"
loadmodule "textopsx.so"
loadmodule "siputils.so"
loadmodule "htable.so"

# ----------------- setting module-specific parameters ---------------
modparam("tm", "failure_reply_mode", 3)
modparam("rr", "append_fromtag", 0)
modparam("corex", "alias_subdomains", "MY_DOMAIN")
modparam("htable", "htable", "regs=>size=14;autoexpire=3530;") #- 16384 slots

####### Routing Logic ########

request_route {
	route(REQINIT);

	if (is_method("CANCEL")) {
		if (t_check_trans()) {
			route(RELAY);
		}
		exit;
	}

	route(WITHINDLG);

	t_check_trans();

	if (is_method("REGISTER")) {
		if ($sht(regs=>$fU@$fd)!=$null) {
			if ($sht(regs=>$fU@$fd)==$_s($si:$sp)) {
				sl_send_reply("200", "OK");
				exit;
			}
		}

		$var(host) = $si + ":" + $sp;
		$var(user) = $(sel(contact.uri.user));
		remove_hf("Route");
		remove_hf("Contact");
		if (is_present_hf("Expires")) {
			remove_hf("Expires");
		}
		
		add_path();
		append_hf("Contact: \r\n","CSeq");
		append_hf("Expires: 3600\r\n", "Contact");
		$du = "sip:REGISTRAR_IP:REGISTRAR_PORT";
	} else {
		if (is_method("INVITE|SUBSCRIBE"))
			record_route();

		if(src_ip!=REGISTRAR_IP){
			if ($rU == $null) {
				sl_send_reply("484", "Address Incomplete");
				exit;
			}
			$var(host) = $si + ":" + $sp;
			$var(user) = $(sel(contact.uri.user));
			remove_hf("Contact");
			append_hf("Contact: \r\n","CSeq");
			$du = "sip:REGISTRAR_IP:REGISTRAR_PORT";
		} else {
			# From registrar so route using "Route:" headers...
			if ($(ru{uri.param,lm}) == "midreg") {
				$var(host) = $(ru{uri.param,lhst});
				$du = "sip:" + $(ru{uri.user}) + "@" + $var(host);
			}

			t_on_failure("FAIL_OUTBOUND");
		}
	}

	route(RELAY);
}

route[RELAY] {
	if (!t_relay()) {
		sl_reply_error();
	}
	exit;
}

route[REQINIT] {
	if (!mf_process_maxfwd_header("10")) {
		sl_send_reply("483","Too Many Hops");
		exit;
	}

	if(!sanity_check("1511", "7"))
	{
		xlog("Malformed SIP message from $si:$sp\n");
		exit;
	}
}

route[WITHINDLG] {
	if (has_totag()) {
		if (!loose_route()) {
			switch($rc) {
			case -2:
				sl_send_reply("403", "Forbidden");
				exit;
			default:
				if (is_method("ACK")) {
					if ( t_check_trans() ) {
						route(RELAY);
						exit;
					} else {
						exit;
					}
				}
				sl_send_reply("404","Not Found");
			}
		} else {
			if (is_method("NOTIFY")) {
				record_route();
			}
			route(RELAY);
		}
		exit;
	}
}

onreply_route {
	if (!t_check_trans()) {
		drop;
	}

	if (src_ip!=REGISTRAR_IP) {
		$var(host) = $si + ":" + $sp;
		$var(user) = $(sel(contact.uri.user));
		remove_hf("Contact");
		append_hf("Contact: \r\n","CSeq");
		$du = "sip:REGISTRAR_IP:REGISTRAR_PORT";
	}

	if ($(ru{uri.param,lm}) == "midreg") {
		$var(host) = $(ru{uri.param,lhst});
		$du = "sip:" + $(ru{uri.user}) + "@" + $var(host);
		if ($rm == "REGISTER" && $rs == "200") {
			$sht(regs=>$fU@$fd) = $var(host);
	
			if (is_present_hf("Expires")) {
				$var(exp) = $hdr(Expires) - 30;
				$shtex(regs=>$fU@$fd) = $var(exp);
				remove_hf("Expires");
			}

			if (is_present_hf("Contact")) {
				remove_hf("Contact");
			}

			append_hf("Expires: 60\r\n", "Call-ID");
			append_hf("Contact: $var(ct)\r\n","CSeq");
		}
	}
}

failure_route[FAIL_OUTBOUND] {
	if (t_branch_timeout() || !t_branch_replied()) {
		send_reply("430", "Flow Failed");
	}
}

确实写的好，找不到废话

不过，以我目前的眼光去看，转发注册消息时可以增加分支标志，比如bf=192，这样就完美了

kamailio官网Bussiness部分能找到fred的资料