FreeCalypso > hg > themwi-system-sw
view libsip/sdp_gen.c @ 137:f05183b18d29
top Makefile: add liboutrt
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Thu, 06 Oct 2022 23:59:17 -0800 |
parents | 9f045dcff60e |
children |
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/* * Here we implement generation of outgoing SDP descriptions. */ #include <sys/types.h> #include <sys/socket.h> #include <netinet/in.h> #include <arpa/inet.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <strings.h> #include "sdp.h" #include "out_msg.h" format_sdp_in_buffer(gen, buf, lenptr) struct sdp_gen *gen; char *buf; unsigned *lenptr; { char *dp, *codec_list; dp = buf; strcpy(dp, "v=0\r\n"); dp += 5; sprintf(dp, "o=- %u %u IN IP4 %s\r\n", gen->session_id, gen->version, inet_ntoa(gen->owner_ip)); dp = index(dp, '\0'); strcpy(dp, "s=-\r\n"); dp += 5; sprintf(dp, "c=IN IP4 %s\r\n", inet_ntoa(gen->conn_ip)); dp = index(dp, '\0'); strcpy(dp, "t=0 0\r\n"); dp += 7; switch (gen->codec_mask) { case SDP_CODEC_MASK_PCMU: codec_list = "0"; break; case SDP_CODEC_MASK_PCMA: codec_list = "8"; break; case SDP_CODEC_MASK_BOTH: codec_list = "0 8"; break; case SDP_CODEC_MASK_BOTH | SDP_CODEC_MASK_PCMA_PREF: codec_list = "8 0"; break; default: return(-2); } sprintf(dp, "m=audio %u RTP/AVP %s\r\n", gen->conn_port, codec_list); dp = index(dp, '\0'); if (gen->codec_mask & SDP_CODEC_MASK_PCMU) { strcpy(dp, "a=rtpmap:0 PCMU/8000\r\n"); dp += 22; } if (gen->codec_mask & SDP_CODEC_MASK_PCMA) { strcpy(dp, "a=rtpmap:8 PCMA/8000\r\n"); dp += 22; } strcpy(dp, "a=sendrecv\r\n"); dp += 12; strcpy(dp, "a=ptime:20\r\n"); dp += 12; *lenptr = (dp - buf); return(0); } out_msg_finish_sdp(msg, gen) struct sip_msg_out *msg; struct sdp_gen *gen; { char sdp_buf[256]; unsigned sdp_len; int rc; rc = format_sdp_in_buffer(gen, sdp_buf, &sdp_len); if (rc < 0) return rc; return out_msg_finish_body(msg, sdp_buf, sdp_len); }