测试 rtpengine 的 sip-source 参数

修改 /etc/rtpengine/rtpengine.conf 文件，增加一行配置：

sip-source = true # 一般不需要这样配置，本文仅为说明问题

offfer 部分的日志如下：

[1713246486.390578] DEBUG: [1-5025@192.168.43.126]: [control] Dump for 'offer' from 127.0.0.1:34943: { "supports": [ "load limit" ], "sdp": "v=0

o=XRMG 1704250570 3 IN IP4 10.143.1.14

s=XRMG V2.0

c=IN IP4 10.143.1.14

t=0 0

m=audio 30608 RTP/AVP 8 101

c=IN IP4 10.143.1.14

b=AS:82

b=RS:600

b=RR:2000

a=rtpmap:8 PCMA/8000

a=ptime:20

a=sendrecv

a=rtpmap:101 telephone-event/8000

a=fmtp:101 0-15

", "replace": [ "origin", "session-connection" ], "call-id": "1-5025@192.168.43.126", "via-branch": "z9hG4bK-5025-1-00", "received-from": [ "IP4", "192.168.43.126" ], "from-tag": "5025SIPpTag001", "command": "offer" }

这里 sip-source 的地址（来自 received-from）为 192.168.43.126，端口来自 sdp 里面的 30608

接下来的日志为：

[core] set FILLED flag for stream, local 192.168.43.126:36912 remote 192.168.43.126:30608

远端地址不是 sdp 的 c 地址，而是 sip-source

源码里面 trust_address 如果为 true 代表采用 sdp 的 c 地址，跟 sip-source 的意思正好是反过来的

// call_interfaces.c

// ...

static void call_ng_flags_flags(struct sdp_ng_flags *out, str *s, void *dummy) {
	str_hyphenate(s);

	switch (__csh_lookup(s)) {
		case CSH_LOOKUP("trust-address"):
			out->trust_address = 1;   // sdp c address
			break;
		case CSH_LOOKUP("SIP-source-address"):
		case CSH_LOOKUP("sip-source-address"):
			out->trust_address = 0;  // sip-source
			break;

// sdp.c
// ...
static int fill_endpoint(struct endpoint *ep, const struct sdp_media *media, struct sdp_ng_flags *flags,
		struct network_address *address, long int port)
{
	struct sdp_session *session = media->session;

	if (!flags->trust_address) {
		if (is_addr_unspecified(&flags->parsed_received_from)) {
			if (__parse_address(&flags->parsed_received_from, NULL, &flags->received_from_family,
						&flags->received_from_address))
				return -1;
		}
		ep->address = flags->parsed_received_from; // sip-source
	}