static void tcp_conn_state_set(tcp_conn_t *conn, tcp_cstate_t nstate)
{
tcp_cstate_t old_state;
log_msg(LOG_DEFAULT, LVL_DEBUG, "tcp_conn_state_set(%p)", conn);
old_state = conn->cstate;
conn->cstate = nstate;
fibril_condvar_broadcast(&conn->cstate_cv);
/* Run user callback function */
if (conn->cb != NULL && conn->cb->cstate_change != NULL) {
log_msg(LOG_DEFAULT, LVL_DEBUG, "tcp_conn_state_set() - run user CB");
conn->cb->cstate_change(conn, conn->cb_arg, old_state);
} else {
log_msg(LOG_DEFAULT, LVL_DEBUG, "tcp_conn_state_set() - no user CB");
}
assert(old_state != st_closed);
if (nstate == st_closed) {
tcp_conn_remove(conn);
/* Drop one reference for now being in closed state */
tcp_conn_delref(conn);
}
}
/** Clear the Time-Wait timeout.
*
* @param conn Connection
*/
void tcp_conn_tw_timer_clear(tcp_conn_t *conn)
{
log_msg(LOG_DEFAULT, LVL_DEBUG2, "tcp_conn_tw_timer_clear() begin");
if (fibril_timer_clear_locked(conn->tw_timer) == fts_active)
tcp_conn_delref(conn);
log_msg(LOG_DEFAULT, LVL_DEBUG2, "tcp_conn_tw_timer_clear() end");
}
/** Delist connection.
*
* Remove connection from the connection map.
*/
void tcp_conn_remove(tcp_conn_t *conn)
{
fibril_mutex_lock(&conn_list_lock);
amap_remove(amap, &conn->ident);
list_remove(&conn->link);
fibril_mutex_unlock(&conn_list_lock);
tcp_conn_delref(conn);
}
/** Delete connection.
*
* The caller promises not make no further references to @a conn.
* TCP will free @a conn eventually.
*
* @param conn Connection
*/
void tcp_conn_delete(tcp_conn_t *conn)
{
log_msg(LOG_DEFAULT, LVL_DEBUG, "%s: tcp_conn_delete(%p)", conn->name, conn);
assert(conn->deleted == false);
conn->deleted = true;
conn->cb = NULL;
conn->cb_arg = NULL;
tcp_conn_delref(conn);
}
/** Time-Wait timeout handler.
*
* @param arg Connection
*/
static void tw_timeout_func(void *arg)
{
tcp_conn_t *conn = (tcp_conn_t *) arg;
log_msg(LOG_DEFAULT, LVL_DEBUG, "tw_timeout_func(%p)", conn);
tcp_conn_lock(conn);
if (conn->cstate == st_closed) {
log_msg(LOG_DEFAULT, LVL_DEBUG, "Connection already closed.");
tcp_conn_unlock(conn);
tcp_conn_delref(conn);
return;
}
log_msg(LOG_DEFAULT, LVL_DEBUG, "%s: TW Timeout -> Closed", conn->name);
tcp_conn_state_set(conn, st_closed);
tcp_conn_unlock(conn);
tcp_conn_delref(conn);
log_msg(LOG_DEFAULT, LVL_DEBUG, "tw_timeout_func(%p) end", conn);
}
/** Segment arrived */
void tcp_as_segment_arrived(tcp_sockpair_t *sp, tcp_segment_t *seg)
{
tcp_conn_t *conn;
log_msg(LOG_DEFAULT, LVL_DEBUG, "tcp_as_segment_arrived(f:(%x,%u), l:(%x,%u))",
sp->foreign.addr.ipv4, sp->foreign.port,
sp->local.addr.ipv4, sp->local.port);
conn = tcp_conn_find_ref(sp);
if (conn == NULL) {
log_msg(LOG_DEFAULT, LVL_WARN, "No connection found.");
tcp_unexpected_segment(sp, seg);
return;
}
fibril_mutex_lock(&conn->lock);
if (conn->cstate == st_closed) {
log_msg(LOG_DEFAULT, LVL_WARN, "Connection is closed.");
tcp_unexpected_segment(sp, seg);
fibril_mutex_unlock(&conn->lock);
tcp_conn_delref(conn);
return;
}
if (conn->ident.foreign.addr.ipv4 == TCP_IPV4_ANY)
conn->ident.foreign.addr.ipv4 = sp->foreign.addr.ipv4;
if (conn->ident.foreign.port == TCP_PORT_ANY)
conn->ident.foreign.port = sp->foreign.port;
if (conn->ident.local.addr.ipv4 == TCP_IPV4_ANY)
conn->ident.local.addr.ipv4 = sp->local.addr.ipv4;
tcp_conn_segment_arrived(conn, seg);
fibril_mutex_unlock(&conn->lock);
tcp_conn_delref(conn);
}
/** Segment arrived */
void tcp_as_segment_arrived(inet_ep2_t *epp, tcp_segment_t *seg)
{
tcp_conn_t *conn;
log_msg(LOG_DEFAULT, LVL_DEBUG,
"tcp_as_segment_arrived(f:(%u), l:(%u))",
epp->remote.port, epp->local.port);
conn = tcp_conn_find_ref(epp);
if (conn == NULL) {
log_msg(LOG_DEFAULT, LVL_WARN, "No connection found.");
tcp_unexpected_segment(epp, seg);
return;
}
tcp_conn_segment_arrived(conn, epp, seg);
tcp_conn_delref(conn);
}
/** Enlist connection.
*
* Add connection to the connection map.
*/
int tcp_conn_add(tcp_conn_t *conn)
{
inet_ep2_t aepp;
int rc;
tcp_conn_addref(conn);
fibril_mutex_lock(&conn_list_lock);
log_msg(LOG_DEFAULT, LVL_DEBUG, "tcp_conn_add: conn=%p", conn);
rc = amap_insert(amap, &conn->ident, conn, af_allow_system, &aepp);
if (rc != EOK) {
tcp_conn_delref(conn);
fibril_mutex_unlock(&conn_list_lock);
return rc;
}
conn->ident = aepp;
list_append(&conn->link, &conn_list);
fibril_mutex_unlock(&conn_list_lock);
return EOK;
}