1.modules\nathelper\nathelper.c line 923
memcmp(mediaport->s, "audio", 5) == 0
2.msg_translator.c line 1985
#define ZH_R_PORT ";rport"
/*2007-04-16 add by zhang,for nat*/
memcpy(line_buf+via_len, ZH_R_PORT,strlen(ZH_R_PORT));
via_len += strlen(ZH_R_PORT);
3.rtpproxy main.c 919
static char *rpl_host = NULL; //-I
rpl_host = strdup(optarg);
if( rpl_host ){
len += sprintf(cp, "%d %s\n", lport, rpl_host);
}