/* This callback is called by the STUN session to send packet */
static pj_status_t sess_on_send_msg(pj_stun_session *sess,
void *token,
const void *pkt,
pj_size_t pkt_size,
const pj_sockaddr_t *dst_addr,
unsigned addr_len)
{
pj_stun_sock *stun_sock;
pj_ssize_t size;
stun_sock = (pj_stun_sock *) pj_stun_session_get_user_data(sess);
if (!stun_sock || !stun_sock->active_sock) {
/* We have been shutdown, but this callback may still get called
* by retransmit timer.
*/
return PJ_EINVALIDOP;
}
pj_assert(token==INTERNAL_MSG_TOKEN);
PJ_UNUSED_ARG(token);
size = pkt_size;
return pj_activesock_sendto(stun_sock->active_sock,
&stun_sock->int_send_key,
pkt, &size, 0, dst_addr, addr_len);
}
/*
* Callback notification from STUN session when it wants to send
* a STUN message towards the client.
*/
static pj_status_t stun_on_send_msg(pj_stun_session *sess,
void *token,
const void *pkt,
pj_size_t pkt_size,
const pj_sockaddr_t *dst_addr,
unsigned addr_len)
{
pj_turn_allocation *alloc;
PJ_UNUSED_ARG(token);
alloc = (pj_turn_allocation*) pj_stun_session_get_user_data(sess);
return alloc->transport->sendto(alloc->transport, pkt, pkt_size, 0,
dst_addr, addr_len);
}
/* This callback is called by the STUN session to send packet */
static pj_status_t sess_on_send_msg(pj_stun_session *sess,
void *token,
const void *pkt,
pj_size_t pkt_size,
const pj_sockaddr_t *dst_addr,
unsigned addr_len)
{
pj_stun_sock *stun_sock;
pj_ssize_t size;
pj_status_t status;
pj_bool_t is_stun = PJ_FALSE;
pj_bool_t is_tnl_data = PJ_FALSE;
stun_sock = (pj_stun_sock *) pj_stun_session_get_user_data(sess);
if (!stun_sock || !stun_sock->active_sock) {
/* We have been shutdown, but this callback may still get called
* by retransmit timer.
*/
return PJ_EINVALIDOP;
}
pj_assert(token==INTERNAL_MSG_TOKEN);
PJ_UNUSED_ARG(token);
/* Check that this is STUN message */
status = pj_stun_msg_check((const pj_uint8_t*)pkt, pkt_size,
/*PJ_STUN_IS_DATAGRAM | */PJ_STUN_CHECK_PACKET);
if (status == PJ_SUCCESS)
is_stun = PJ_TRUE;
else
is_tnl_data = (((pj_uint8_t*)pkt)[pkt_size] == 1);
size = pkt_size;
if(is_stun || !is_tnl_data) {
pj_ioqueue_op_key_t *op_key = (pj_ioqueue_op_key_t*)pj_mem_alloc(sizeof(pj_ioqueue_op_key_t));
pj_ioqueue_op_key_init(op_key, sizeof(pj_ioqueue_op_key_t));
return pj_activesock_sendto(stun_sock->active_sock, op_key,
pkt, &size, PJ_IOQUEUE_URGENT_DATA, dst_addr, addr_len);
} else {
return pj_activesock_sendto(stun_sock->active_sock, &stun_sock->send_key,
pkt, &size, 0, dst_addr, addr_len);
}
}
/* This callback is called by the STUN session to send packet */
static pj_status_t sess_on_send_msg(pj_stun_session *sess,
void *token,
const void *pkt,
pj_size_t pkt_size,
const pj_sockaddr_t *dst_addr,
unsigned addr_len)
{
pj_stun_sock *stun_sock;
pj_ssize_t size;
stun_sock = (pj_stun_sock *) pj_stun_session_get_user_data(sess);
pj_assert(token==INTERNAL_MSG_TOKEN);
PJ_UNUSED_ARG(token);
size = pkt_size;
return pj_activesock_sendto(stun_sock->active_sock,
&stun_sock->int_send_key,
pkt, &size, 0, dst_addr, addr_len);
}
/*
* Callback to send outgoing packet from STUN session.
*/
static pj_status_t on_send_msg(pj_stun_session *stun_sess,
void *token,
const void *pkt,
pj_size_t pkt_size,
const pj_sockaddr_t *dst_addr,
unsigned addr_len)
{
nat_detect_session *sess;
pj_ssize_t pkt_len;
pj_status_t status;
PJ_UNUSED_ARG(token);
sess = (nat_detect_session*) pj_stun_session_get_user_data(stun_sess);
pkt_len = pkt_size;
status = pj_ioqueue_sendto(sess->key, &sess->write_op, pkt, &pkt_len, 0,
dst_addr, addr_len);
return status;
}
/*
* Callback notification from STUN session when it receives STUN
* indications. This callback was trigger by STUN incoming message
* processing in pj_turn_allocation_on_rx_client_pkt().
*/
static pj_status_t stun_on_rx_indication(pj_stun_session *sess,
const pj_uint8_t *pkt,
unsigned pkt_len,
const pj_stun_msg *msg,
void *token,
const pj_sockaddr_t *src_addr,
unsigned src_addr_len)
{
pj_stun_xor_peer_addr_attr *peer_attr;
pj_stun_data_attr *data_attr;
pj_turn_allocation *alloc;
pj_turn_permission *perm;
pj_ssize_t len;
PJ_UNUSED_ARG(pkt);
PJ_UNUSED_ARG(pkt_len);
PJ_UNUSED_ARG(token);
PJ_UNUSED_ARG(src_addr);
PJ_UNUSED_ARG(src_addr_len);
alloc = (pj_turn_allocation*) pj_stun_session_get_user_data(sess);
/* Only expect Send Indication */
if (msg->hdr.type != PJ_STUN_SEND_INDICATION) {
/* Ignore */
return PJ_SUCCESS;
}
/* Get XOR-PEER-ADDRESS attribute */
peer_attr = (pj_stun_xor_peer_addr_attr*)
pj_stun_msg_find_attr(msg, PJ_STUN_ATTR_XOR_PEER_ADDR, 0);
/* MUST have XOR-PEER-ADDRESS attribute */
if (!peer_attr)
return PJ_SUCCESS;
/* Get DATA attribute */
data_attr = (pj_stun_data_attr*)
pj_stun_msg_find_attr(msg, PJ_STUN_ATTR_DATA, 0);
/* Create/update/refresh the permission */
perm = lookup_permission_by_addr(alloc, &peer_attr->sockaddr,
pj_sockaddr_get_len(&peer_attr->sockaddr));
if (perm == NULL) {
perm = create_permission(alloc, &peer_attr->sockaddr,
pj_sockaddr_get_len(&peer_attr->sockaddr));
}
refresh_permission(perm);
/* Return if we don't have data */
if (data_attr == NULL)
return PJ_SUCCESS;
/* Relay the data to peer */
len = data_attr->length;
pj_sock_sendto(alloc->relay.tp.sock, data_attr->data,
&len, 0, &peer_attr->sockaddr,
pj_sockaddr_get_len(&peer_attr->sockaddr));
return PJ_SUCCESS;
}
/*
* Callback notification from STUN session when it receives STUN
* requests. This callback was trigger by STUN incoming message
* processing in pj_turn_allocation_on_rx_client_pkt().
*/
static pj_status_t stun_on_rx_request(pj_stun_session *sess,
const pj_uint8_t *pkt,
unsigned pkt_len,
const pj_stun_rx_data *rdata,
void *token,
const pj_sockaddr_t *src_addr,
unsigned src_addr_len)
{
const pj_stun_msg *msg = rdata->msg;
pj_turn_allocation *alloc;
PJ_UNUSED_ARG(pkt);
PJ_UNUSED_ARG(pkt_len);
PJ_UNUSED_ARG(token);
PJ_UNUSED_ARG(src_addr);
PJ_UNUSED_ARG(src_addr_len);
alloc = (pj_turn_allocation*) pj_stun_session_get_user_data(sess);
/* Refuse to serve any request if we've been shutdown */
if (alloc->relay.lifetime == 0) {
/* Reject with 437 if we're shutting down */
send_reply_err(alloc, rdata, PJ_TRUE,
PJ_STUN_SC_ALLOCATION_MISMATCH, NULL);
return PJ_SUCCESS;
}
if (msg->hdr.type == PJ_STUN_REFRESH_REQUEST) {
/*
* Handle REFRESH request
*/
pj_stun_lifetime_attr *lifetime;
pj_stun_bandwidth_attr *bandwidth;
/* Get LIFETIME attribute */
lifetime = (pj_stun_lifetime_attr*)
pj_stun_msg_find_attr(msg, PJ_STUN_ATTR_LIFETIME, 0);
/* Get BANDWIDTH attribute */
bandwidth = (pj_stun_bandwidth_attr*)
pj_stun_msg_find_attr(msg, PJ_STUN_ATTR_BANDWIDTH, 0);
/* TODO: process bandwidth */
PJ_UNUSED_ARG(bandwidth);
if (lifetime && lifetime->value==0) {
/*
* This is deallocation request.
*/
alloc->relay.lifetime = 0;
/* Respond first */
send_reply_ok(alloc, rdata);
/* Shutdown allocation */
PJ_LOG(4,(alloc->obj_name,
"Client %s request to dealloc, shutting down",
alloc->info));
alloc_shutdown(alloc);
} else {
/*
* This is a refresh request.
*/
/* Update lifetime */
if (lifetime) {
alloc->relay.lifetime = lifetime->value;
}
/* Update bandwidth */
// TODO:
/* Update expiration timer */
resched_timeout(alloc);
/* Send reply */
send_reply_ok(alloc, rdata);
}
} else if (msg->hdr.type == PJ_STUN_CHANNEL_BIND_REQUEST) {
/*
* ChannelBind request.
*/
pj_stun_channel_number_attr *ch_attr;
pj_stun_xor_peer_addr_attr *peer_attr;
pj_turn_permission *p1, *p2;
ch_attr = (pj_stun_channel_number_attr*)
pj_stun_msg_find_attr(msg, PJ_STUN_ATTR_CHANNEL_NUMBER, 0);
peer_attr = (pj_stun_xor_peer_addr_attr*)
pj_stun_msg_find_attr(msg, PJ_STUN_ATTR_XOR_PEER_ADDR, 0);
if (!ch_attr || !peer_attr) {
send_reply_err(alloc, rdata, PJ_TRUE,
PJ_STUN_SC_BAD_REQUEST, NULL);
return PJ_SUCCESS;
}
/* Find permission with the channel number */
p1 = lookup_permission_by_chnum(alloc, PJ_STUN_GET_CH_NB(ch_attr->value));
/* If permission is found, this is supposed to be a channel bind
* refresh. Make sure it's for the same peer.
*/
if (p1) {
if (pj_sockaddr_cmp(&p1->hkey.peer_addr, &peer_attr->sockaddr)) {
/* Address mismatch. Send 400 */
send_reply_err(alloc, rdata, PJ_TRUE,
PJ_STUN_SC_BAD_REQUEST,
"Peer address mismatch");
return PJ_SUCCESS;
}
/* Refresh permission */
refresh_permission(p1);
/* Send response */
send_reply_ok(alloc, rdata);
/* Done */
return PJ_SUCCESS;
}
/* If permission is not found, create a new one. Make sure the peer
* has not alreadyy assigned with a channel number.
*/
p2 = lookup_permission_by_addr(alloc, &peer_attr->sockaddr,
pj_sockaddr_get_len(&peer_attr->sockaddr));
if (p2 && p2->channel != PJ_TURN_INVALID_CHANNEL) {
send_reply_err(alloc, rdata, PJ_TRUE, PJ_STUN_SC_BAD_REQUEST,
"Peer address already assigned a channel number");
return PJ_SUCCESS;
}
/* Create permission if it doesn't exist */
if (!p2) {
p2 = create_permission(alloc, &peer_attr->sockaddr,
pj_sockaddr_get_len(&peer_attr->sockaddr));
if (!p2)
return PJ_SUCCESS;
}
/* Assign channel number to permission */
p2->channel = PJ_STUN_GET_CH_NB(ch_attr->value);
/* Register to hash table */
pj_assert(sizeof(p2->channel)==2);
pj_hash_set(alloc->pool, alloc->ch_table, &p2->channel,
sizeof(p2->channel), 0, p2);
/* Update */
refresh_permission(p2);
/* Reply */
send_reply_ok(alloc, rdata);
return PJ_SUCCESS;
} else if (msg->hdr.type == PJ_STUN_ALLOCATE_REQUEST) {
/* Respond with 437 (section 6.3 turn-07) */
send_reply_err(alloc, rdata, PJ_TRUE, PJ_STUN_SC_ALLOCATION_MISMATCH,
NULL);
} else {
/* Respond with Bad Request? */
send_reply_err(alloc, rdata, PJ_TRUE, PJ_STUN_SC_BAD_REQUEST, NULL);
}
return PJ_SUCCESS;
}
/*
* Callback upon request completion.
*/
static void on_request_complete(pj_stun_session *stun_sess,
pj_status_t status,
void *token,
pj_stun_tx_data *tdata,
const pj_stun_msg *response,
const pj_sockaddr_t *src_addr,
unsigned src_addr_len)
{
nat_detect_session *sess;
pj_stun_sockaddr_attr *mattr = NULL;
pj_stun_changed_addr_attr *ca = NULL;
pj_uint32_t *tsx_id;
int cmp;
unsigned test_id;
PJ_UNUSED_ARG(token);
PJ_UNUSED_ARG(tdata);
PJ_UNUSED_ARG(src_addr);
PJ_UNUSED_ARG(src_addr_len);
sess = (nat_detect_session*) pj_stun_session_get_user_data(stun_sess);
pj_grp_lock_acquire(sess->grp_lock);
/* Find errors in the response */
if (status == PJ_SUCCESS) {
/* Check error message */
if (PJ_STUN_IS_ERROR_RESPONSE(response->hdr.type)) {
pj_stun_errcode_attr *eattr;
int err_code;
eattr = (pj_stun_errcode_attr*)
pj_stun_msg_find_attr(response, PJ_STUN_ATTR_ERROR_CODE, 0);
if (eattr != NULL)
err_code = eattr->err_code;
else
err_code = PJ_STUN_SC_SERVER_ERROR;
status = PJ_STATUS_FROM_STUN_CODE(err_code);
} else {
/* Get MAPPED-ADDRESS or XOR-MAPPED-ADDRESS */
mattr = (pj_stun_sockaddr_attr*)
pj_stun_msg_find_attr(response, PJ_STUN_ATTR_XOR_MAPPED_ADDR, 0);
if (mattr == NULL) {
mattr = (pj_stun_sockaddr_attr*)
pj_stun_msg_find_attr(response, PJ_STUN_ATTR_MAPPED_ADDR, 0);
}
if (mattr == NULL) {
status = PJNATH_ESTUNNOMAPPEDADDR;
}
/* Get CHANGED-ADDRESS attribute */
ca = (pj_stun_changed_addr_attr*)
pj_stun_msg_find_attr(response, PJ_STUN_ATTR_CHANGED_ADDR, 0);
if (ca == NULL) {
status = PJ_STATUS_FROM_STUN_CODE(PJ_STUN_SC_SERVER_ERROR);
}
}
}
/* Save the result */
tsx_id = (pj_uint32_t*) tdata->msg->hdr.tsx_id;
test_id = tsx_id[2];
if (test_id >= ST_MAX) {
PJ_LOG(4,(sess->pool->obj_name, "Invalid transaction ID %u in response",
test_id));
end_session(sess, PJ_STATUS_FROM_STUN_CODE(PJ_STUN_SC_SERVER_ERROR),
PJ_STUN_NAT_TYPE_ERR_UNKNOWN);
goto on_return;
}
PJ_LOG(5,(sess->pool->obj_name, "Completed %s, status=%d",
test_names[test_id], status));
sess->result[test_id].complete = PJ_TRUE;
sess->result[test_id].status = status;
if (status == PJ_SUCCESS) {
pj_memcpy(&sess->result[test_id].ma, &mattr->sockaddr.ipv4,
sizeof(pj_sockaddr_in));
pj_memcpy(&sess->result[test_id].ca, &ca->sockaddr.ipv4,
sizeof(pj_sockaddr_in));
}
/* Send Test 1B only when Test 2 completes. Must not send Test 1B
* before Test 2 completes to avoid creating mapping on the NAT.
*/
if (!sess->result[ST_TEST_1B].executed &&
sess->result[ST_TEST_2].complete &&
sess->result[ST_TEST_2].status != PJ_SUCCESS &&
sess->result[ST_TEST_1].complete &&
sess->result[ST_TEST_1].status == PJ_SUCCESS)
{
cmp = pj_memcmp(&sess->local_addr, &sess->result[ST_TEST_1].ma,
sizeof(pj_sockaddr_in));
if (cmp != 0)
send_test(sess, ST_TEST_1B, &sess->result[ST_TEST_1].ca, 0);
}
if (test_completed(sess)<3 || test_completed(sess)!=test_executed(sess))
goto on_return;
/* Handle the test result according to RFC 3489 page 22:
+--------+
| Test |
| 1 |
+--------+
|
|
V
/\ /\
N / \ Y / \ Y +--------+
UDP <-------/Resp\--------->/ IP \------------->| Test |
Blocked \ ? / \Same/ | 2 |
\ / \? / +--------+
\/ \/ |
| N |
| V
V /\
+--------+ Sym. N / \
| Test | UDP <---/Resp\
| 2 | Firewall \ ? /
+--------+ \ /
| \/
V |Y
/\ /\ |
Symmetric N / \ +--------+ N / \ V
NAT <--- / IP \<-----| Test |<--- /Resp\ Open
\Same/ | 1B | \ ? / Internet
\? / +--------+ \ /
\/ \/
| |Y
| |
| V
| Full
| Cone
V /\
+--------+ / \ Y
| Test |------>/Resp\---->Restricted
| 3 | \ ? /
+--------+ \ /
\/
|N
| Port
+------>Restricted
Figure 2: Flow for type discovery process
*/
switch (sess->result[ST_TEST_1].status) {
case PJNATH_ESTUNTIMEDOUT:
/*
* Test 1 has timed-out. Conclude with NAT_TYPE_BLOCKED.
*/
end_session(sess, PJ_SUCCESS, PJ_STUN_NAT_TYPE_BLOCKED);
break;
case PJ_SUCCESS:
/*
* Test 1 is successful. Further tests are needed to detect
* NAT type. Compare the MAPPED-ADDRESS with the local address.
*/
cmp = pj_memcmp(&sess->local_addr, &sess->result[ST_TEST_1].ma,
sizeof(pj_sockaddr_in));
if (cmp==0) {
/*
* MAPPED-ADDRESS and local address is equal. Need one more
* test to determine NAT type.
*/
switch (sess->result[ST_TEST_2].status) {
case PJ_SUCCESS:
/*
* Test 2 is also successful. We're in the open.
*/
end_session(sess, PJ_SUCCESS, PJ_STUN_NAT_TYPE_OPEN);
break;
case PJNATH_ESTUNTIMEDOUT:
/*
* Test 2 has timed out. We're behind somekind of UDP
* firewall.
*/
end_session(sess, PJ_SUCCESS, PJ_STUN_NAT_TYPE_SYMMETRIC_UDP);
break;
default:
/*
* We've got other error with Test 2.
*/
end_session(sess, sess->result[ST_TEST_2].status,
PJ_STUN_NAT_TYPE_ERR_UNKNOWN);
break;
}
} else {
/*
* MAPPED-ADDRESS is different than local address.
* We're behind NAT.
*/
switch (sess->result[ST_TEST_2].status) {
case PJ_SUCCESS:
/*
* Test 2 is successful. We're behind a full-cone NAT.
*/
end_session(sess, PJ_SUCCESS, PJ_STUN_NAT_TYPE_FULL_CONE);
break;
case PJNATH_ESTUNTIMEDOUT:
/*
* Test 2 has timed-out Check result of test 1B..
*/
switch (sess->result[ST_TEST_1B].status) {
case PJ_SUCCESS:
/*
* Compare the MAPPED-ADDRESS of test 1B with the
* MAPPED-ADDRESS returned in test 1..
*/
cmp = pj_memcmp(&sess->result[ST_TEST_1].ma,
&sess->result[ST_TEST_1B].ma,
sizeof(pj_sockaddr_in));
if (cmp != 0) {
/*
* MAPPED-ADDRESS is different, we're behind a
* symmetric NAT.
*/
end_session(sess, PJ_SUCCESS,
PJ_STUN_NAT_TYPE_SYMMETRIC);
} else {
/*
* MAPPED-ADDRESS is equal. We're behind a restricted
* or port-restricted NAT, depending on the result of
* test 3.
*/
switch (sess->result[ST_TEST_3].status) {
case PJ_SUCCESS:
/*
* Test 3 is successful, we're behind a restricted
* NAT.
*/
end_session(sess, PJ_SUCCESS,
PJ_STUN_NAT_TYPE_RESTRICTED);
break;
case PJNATH_ESTUNTIMEDOUT:
/*
* Test 3 failed, we're behind a port restricted
* NAT.
*/
end_session(sess, PJ_SUCCESS,
PJ_STUN_NAT_TYPE_PORT_RESTRICTED);
break;
default:
/*
* Got other error with test 3.
*/
end_session(sess, sess->result[ST_TEST_3].status,
PJ_STUN_NAT_TYPE_ERR_UNKNOWN);
break;
}
}
break;
case PJNATH_ESTUNTIMEDOUT:
/*
* Strangely test 1B has failed. Maybe connectivity was
* lost? Or perhaps port 3489 (the usual port number in
* CHANGED-ADDRESS) is blocked?
*/
switch (sess->result[ST_TEST_3].status) {
case PJ_SUCCESS:
/* Although test 1B failed, test 3 was successful.
* It could be that port 3489 is blocked, while the
* NAT itself looks to be a Restricted one.
*/
end_session(sess, PJ_SUCCESS,
PJ_STUN_NAT_TYPE_RESTRICTED);
break;
default:
/* Can't distinguish between Symmetric and Port
* Restricted, so set the type to Unknown
*/
end_session(sess, PJ_SUCCESS,
PJ_STUN_NAT_TYPE_ERR_UNKNOWN);
break;
}
break;
default:
/*
* Got other error with test 1B.
*/
end_session(sess, sess->result[ST_TEST_1B].status,
PJ_STUN_NAT_TYPE_ERR_UNKNOWN);
break;
}
break;
default:
/*
* We've got other error with Test 2.
*/
end_session(sess, sess->result[ST_TEST_2].status,
PJ_STUN_NAT_TYPE_ERR_UNKNOWN);
break;
}
}
break;
default:
/*
* We've got other error with Test 1.
*/
end_session(sess, sess->result[ST_TEST_1].status,
PJ_STUN_NAT_TYPE_ERR_UNKNOWN);
break;
}
on_return:
pj_grp_lock_release(sess->grp_lock);
}
/* This callback is called by the STUN session when outgoing transaction
* is complete
*/
static void sess_on_request_complete(pj_stun_session *sess,
pj_status_t status,
void *token,
pj_stun_tx_data *tdata,
const pj_stun_msg *response,
const pj_sockaddr_t *src_addr,
unsigned src_addr_len)
{
pj_stun_sock *stun_sock;
const pj_stun_sockaddr_attr *mapped_attr;
pj_stun_sock_op op;
pj_bool_t mapped_changed;
pj_bool_t resched = PJ_TRUE;
stun_sock = (pj_stun_sock *) pj_stun_session_get_user_data(sess);
PJ_UNUSED_ARG(tdata);
PJ_UNUSED_ARG(token);
PJ_UNUSED_ARG(src_addr);
PJ_UNUSED_ARG(src_addr_len);
/* Check if this is a keep-alive or the first Binding request */
if (pj_sockaddr_has_addr(&stun_sock->mapped_addr))
op = PJ_STUN_SOCK_KEEP_ALIVE_OP;
else
op = PJ_STUN_SOCK_BINDING_OP;
/* Handle failure */
if (status != PJ_SUCCESS) {
resched = sess_fail(stun_sock, op, status);
goto on_return;
}
/* Get XOR-MAPPED-ADDRESS, or MAPPED-ADDRESS when XOR-MAPPED-ADDRESS
* doesn't exist.
*/
mapped_attr = (const pj_stun_sockaddr_attr*)
pj_stun_msg_find_attr(response, PJ_STUN_ATTR_XOR_MAPPED_ADDR,
0);
if (mapped_attr==NULL) {
mapped_attr = (const pj_stun_sockaddr_attr*)
pj_stun_msg_find_attr(response, PJ_STUN_ATTR_MAPPED_ADDR,
0);
}
if (mapped_attr == NULL) {
resched = sess_fail(stun_sock, op, PJNATH_ESTUNNOMAPPEDADDR);
goto on_return;
}
/* Determine if mapped address has changed, and save the new mapped
* address and call callback if so
*/
mapped_changed = !pj_sockaddr_has_addr(&stun_sock->mapped_addr) ||
pj_sockaddr_cmp(&stun_sock->mapped_addr,
&mapped_attr->sockaddr) != 0;
if (mapped_changed) {
/* Print mapped adress */
{
char addrinfo[PJ_INET6_ADDRSTRLEN+10];
PJ_LOG(4,(stun_sock->obj_name,
"STUN mapped address found/changed: %s",
pj_sockaddr_print(&mapped_attr->sockaddr,
addrinfo, sizeof(addrinfo), 3)));
}
pj_sockaddr_cp(&stun_sock->mapped_addr, &mapped_attr->sockaddr);
if (op==PJ_STUN_SOCK_KEEP_ALIVE_OP)
op = PJ_STUN_SOCK_MAPPED_ADDR_CHANGE;
}
/* Notify user */
resched = (*stun_sock->cb.on_status)(stun_sock, op, PJ_SUCCESS);
on_return:
/* Start/restart keep-alive timer */
if (resched)
start_ka_timer(stun_sock);
}
/* This callback is called by the STUN session when outgoing transaction
* is complete
*/
static void sess_on_request_complete(pj_stun_session *sess,
pj_status_t status,
void *token,
pj_stun_tx_data *tdata,
const pj_stun_msg *response,
const pj_sockaddr_t *src_addr,
unsigned src_addr_len)
{
pj_stun_sock *stun_sock;
const pj_stun_sockaddr_attr *mapped_attr;
pj_stun_sock_op op;
pj_bool_t mapped_changed;
pj_bool_t resched = PJ_TRUE;
stun_sock = (pj_stun_sock *) pj_stun_session_get_user_data(sess);
if (!stun_sock)
return;
PJ_UNUSED_ARG(tdata);
PJ_UNUSED_ARG(token);
PJ_UNUSED_ARG(src_addr);
PJ_UNUSED_ARG(src_addr_len);
/* Check if this is a keep-alive or the first Binding request */
if (pj_sockaddr_has_addr(&stun_sock->mapped_addr))
op = PJ_STUN_SOCK_KEEP_ALIVE_OP;
else
op = PJ_STUN_SOCK_BINDING_OP;
/* Handle failure */
if (status != PJ_SUCCESS) {
resched = sess_fail(stun_sock, op, status);
goto on_return;
}
/* Get XOR-MAPPED-ADDRESS, or MAPPED-ADDRESS when XOR-MAPPED-ADDRESS
* doesn't exist.
*/
mapped_attr = (const pj_stun_sockaddr_attr*)
pj_stun_msg_find_attr(response, PJ_STUN_ATTR_XOR_MAPPED_ADDR,
0);
if (mapped_attr==NULL) {
mapped_attr = (const pj_stun_sockaddr_attr*)
pj_stun_msg_find_attr(response, PJ_STUN_ATTR_MAPPED_ADDR,
0);
}
if (mapped_attr == NULL) {
resched = sess_fail(stun_sock, op, PJNATH_ESTUNNOMAPPEDADDR);
goto on_return;
}
/* Determine if mapped address has changed, and save the new mapped
* address and call callback if so
*/
mapped_changed = !pj_sockaddr_has_addr(&stun_sock->mapped_addr) ||
pj_sockaddr_cmp(&stun_sock->mapped_addr,
&mapped_attr->sockaddr) != 0;
if (mapped_changed) {
/* Print mapped adress */
{
char addrinfo[PJ_INET6_ADDRSTRLEN+10];
PJ_LOG(2,(stun_sock->obj_name,
"STUN mapped address found/changed: %s",
pj_sockaddr_print(&mapped_attr->sockaddr,
addrinfo, sizeof(addrinfo), 3)));
}
pj_sockaddr_cp(&stun_sock->mapped_addr, &mapped_attr->sockaddr);
if (op==PJ_STUN_SOCK_KEEP_ALIVE_OP) {
op = PJ_STUN_SOCK_MAPPED_ADDR_CHANGE;
PJ_LOG(2, (THIS_FILE, "sess_on_rquest_complete() Operation is PJ_STUN_SOCK_MAPPED_ADDR_CHANGE."));
}
}
// 2013-10-16 DEAN
// 2013-10-21 DEAN
{
int addr_len = sizeof(stun_sock->current_local_addr);
char addrinfo1[PJ_INET6_ADDRSTRLEN+10];
char addrinfo2[PJ_INET6_ADDRSTRLEN+10];
pj_sock_getsockname(stun_sock->sock_fd, &stun_sock->current_local_addr,
&addr_len);
PJ_LOG(6,(stun_sock->obj_name,
"Current Local address: %s",
pj_sockaddr_print(&stun_sock->current_local_addr,
addrinfo1, sizeof(addrinfo1), 3)));
/*
* Find out which interface is used to send to the server.
*/
status = get_local_interface(&stun_sock->srv_addr, &((pj_sockaddr_in *)(&stun_sock->current_local_addr))->sin_addr);
PJ_LOG(6,(stun_sock->obj_name,
"Current Local address: %s",
pj_sockaddr_print(&stun_sock->current_local_addr,
addrinfo2, sizeof(addrinfo2), 3)));
}
/* Notify user */
resched = (*stun_sock->cb.on_status)(stun_sock, op, PJ_SUCCESS);
PJ_LOG(5, (THIS_FILE, "sess_on_request_complete() resched=%d.", resched));
on_return:
/* Start/restart keep-alive timer */
if (resched)
start_ka_timer(stun_sock);
}
