stun_hdr_t *
get_stun_full_request(const char *lufrag,
const char *rufrag, const char *rpwd)
{
char fullfrag[128];
int i;
uint32_t crc;
char *ptr;
stun_hdr_t *stn_req = NULL;
stun_packet_t *stn_pkt = NULL;
unsigned long int val;
ENTER;
TRACE("Generating stun packet for "
"rufrag(%s),rpwd(%s),lufrag(%s)\n", rufrag, rpwd, lufrag);
if (!lufrag || !rufrag || !rpwd)
return NULL;
x_sprintf(fullfrag, "%s:%s", rufrag, lufrag);
stn_pkt = stun_pkt_new();
stun_set_attr_d(stn_pkt, STUN_PRIORITY, 4, (char *) &stn_pkt);
val = random();
stun_set_attr_d(stn_pkt, STUN_ICE_CONTROLLED, 8, (char *) &val);
stun_set_attr_d(stn_pkt, STUN_USERNAME, strlen(fullfrag), (char *) fullfrag);
stn_req = stun_hdr_from_packet(stn_pkt);
stn_req->mcookie = STUN_NET_M_COOKIE;
stn_req->ver_type.raw = htons(STUN_REQ);
// set transction id
x_snprintf(stn_req->trans_id, sizeof(stn_req->trans_id), "%12d",
(int) random());
stn_req = stun_add_integrity(stn_req, rpwd);
// add CRC32
i = ntohs(stn_req->mlen) + sizeof(stun_hdr_t);
stn_req = x_realloc(stn_req, i + 8);
stn_req->mlen = htons(i + 8 - sizeof(stun_hdr_t));
crc = stun_get_fingerprint(stn_req);
ptr = (char *) stn_req + i;
*(uint16_t *) ptr = htons(STUN_FINGERPRINT);
ptr += sizeof(uint16_t);
*(uint16_t *) ptr = htons(4);
ptr += sizeof(uint16_t);
*(uint32_t *) ptr = htonl(crc ^ STUN_FINGERPRINT_XOR);
stun_pkt_free(stn_pkt);
EXIT;
return stn_req;
}
void _loempa(const char *function, const int line, const int level, const char *fmt, ...) {
va_list ap;
char buffer[BSIZE];
x_size i;
i = x_snprintf(buffer, BSIZE, "OS %35s %4d: ", function, line);
va_start(ap, fmt);
i += x_vsnprintf(buffer + i, BSIZE - i, fmt, ap);
va_end(ap);
write(1, buffer, i);
}
