From 784c18128b4b96c9993e7cfff93a70b75096762c Mon Sep 17 00:00:00 2001 From: Alexander Traud Date: Wed, 8 Jun 2016 09:11:40 +0200 Subject: chan_sip: No rtpmap for static RTP payload IDs in SDP. This saves around 100 bytes when G.711, G.722, G.729, and GSM are advertised in SDP. This reduces the chance to hit the MTU bearer of 1300 bytes for SIP over UDP, if many codecs are allowed in Asterisk. This new feature is enabled together with the optional feature compactheaders=yes via the file sip.conf. ASTERISK-25578 #close Change-Id: I16491b1937862de26f84fa0ffe679a6bab925044 --- channels/chan_sip.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/channels/chan_sip.c b/channels/chan_sip.c index 19f8aa308..d44bf8a83 100644 --- a/channels/chan_sip.c +++ b/channels/chan_sip.c @@ -12996,7 +12996,7 @@ static void add_codec_to_sdp(const struct sip_pvt *p, /* Opus mandates 2 channels in rtpmap */ if (ast_format_cmp(format, ast_format_opus) == AST_FORMAT_CMP_EQUAL) { ast_str_append(a_buf, 0, "a=rtpmap:%d %s/%u/2\r\n", rtp_code, mime, rate); - } else { + } else if ((35 <= rtp_code) || !(sip_cfg.compactheaders)) { ast_str_append(a_buf, 0, "a=rtpmap:%d %s/%u\r\n", rtp_code, mime, rate); } -- cgit v1.2.3