/** 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);
}
/** Segment arrived on a connection.
*
* @param conn Connection
* @param epp Endpoint pair on which segment was received
* @param seg Segment
*/
void tcp_conn_segment_arrived(tcp_conn_t *conn, inet_ep2_t *epp,
tcp_segment_t *seg)
{
inet_ep2_t aepp;
inet_ep2_t oldepp;
int rc;
log_msg(LOG_DEFAULT, LVL_DEBUG, "%s: tcp_conn_segment_arrived(%p)",
conn->name, seg);
tcp_conn_lock(conn);
if (conn->cstate == st_closed) {
log_msg(LOG_DEFAULT, LVL_WARN, "Connection is closed.");
tcp_unexpected_segment(epp, seg);
tcp_conn_unlock(conn);
return;
}
if (inet_addr_is_any(&conn->ident.remote.addr) ||
conn->ident.remote.port == inet_port_any ||
inet_addr_is_any(&conn->ident.local.addr)) {
log_msg(LOG_DEFAULT, LVL_DEBUG2, "tcp_conn_segment_arrived: "
"Changing connection ID, updating amap.");
oldepp = conn->ident;
/* Need to remove and re-insert connection with new identity */
fibril_mutex_lock(&conn_list_lock);
if (inet_addr_is_any(&conn->ident.remote.addr))
conn->ident.remote.addr = epp->remote.addr;
if (conn->ident.remote.port == inet_port_any)
conn->ident.remote.port = epp->remote.port;
if (inet_addr_is_any(&conn->ident.local.addr))
conn->ident.local.addr = epp->local.addr;
rc = amap_insert(amap, &conn->ident, conn, af_allow_system, &aepp);
if (rc != EOK) {
assert(rc != EEXIST);
assert(rc == ENOMEM);
log_msg(LOG_DEFAULT, LVL_ERROR, "Out of memory.");
fibril_mutex_unlock(&conn_list_lock);
tcp_conn_unlock(conn);
return;
}
amap_remove(amap, &oldepp);
fibril_mutex_unlock(&conn_list_lock);
conn->name = (char *) "a";
}
switch (conn->cstate) {
case st_listen:
tcp_conn_sa_listen(conn, seg);
break;
case st_syn_sent:
tcp_conn_sa_syn_sent(conn, seg);
break;
case st_syn_received:
case st_established:
case st_fin_wait_1:
case st_fin_wait_2:
case st_close_wait:
case st_closing:
case st_last_ack:
case st_time_wait:
/* Process segments in order of sequence number */
tcp_conn_sa_queue(conn, seg);
break;
case st_closed:
log_msg(LOG_DEFAULT, LVL_DEBUG, "state=%d", (int) conn->cstate);
assert(false);
}
tcp_conn_unlock(conn);
}
