/*
* Initialize UAC
*/
int uac_init(void)
{
str src[3];
struct socket_info *si;
if (RAND_MAX < TM_TABLE_ENTRIES) {
LM_WARN("uac does not spread across the whole hash table\n");
}
/* on tcp/tls bind_address is 0 so try to get the first address we listen
* on no matter the protocol */
si=bind_address?bind_address:get_first_socket();
if (si==0){
LM_CRIT("null socket list\n");
return -1;
}
/* calculate the initial From tag */
src[0].s = "Long live SER server";
src[0].len = strlen(src[0].s);
src[1].s = si->address_str.s;
src[1].len = strlen(src[1].s);
src[2].s = si->port_no_str.s;
src[2].len = strlen(src[2].s);
MD5StringArray(from_tag, src, 3);
from_tag[MD5_LEN] = '-';
return 1;
}
static void gen_call_id_ftag(str *aor, str *now, str *call_id_ftag)
{
int i = 0;
str src[2];
call_id_ftag->len = MD5_LEN;
call_id_ftag->s = call_id_ftag_buf;
src[i++] = *aor;
if(now->s && now->len)
src[i++] = *now;
MD5StringArray(call_id_ftag->s, src, i);
return;
}
static void generate_tag(str* tag, str* src, str* callid)
{
int len;
MD5StringArray(from_tag, src, 1);
len = MD5_LEN;
/* calculate from tag from callid */
if(callid)
{
from_tag[len++] = '-';
crcitt_string_array(&from_tag[MD5_LEN + 1], callid, 1);
len+= CRC16_LEN;
}
tag->s = from_tag;
tag->len = len;
LM_DBG("from_tag = %.*s\n", tag->len, tag->s);
}
