Changeset f343a16 in mainline for uspace/srv/net/tl/tcp/conn.c

Timestamp:

2011-10-23T23:43:38Z (14 years ago)

Author:

Jiri Svoboda <jiri@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

6df418c4

Parents:

32aea9f4

Message:

Connection state change when FIN is sent.

File:

• uspace/srv/net/tl/tcp/conn.c (modified) (2 diffs)

uspace/srv/net/tl/tcp/conn.c

@@ -130 +130 @@
         tcp_tqueue_ctrl_seg(conn, CTL_SYN);
         conn->cstate = st_syn_sent;
+}
+
+/** FIN has been sent.
+ *
+ * This function should be called when FIN is sent over the connection,
+ * as a result the connection state is changed appropriately.
+ */
+void tcp_conn_fin_sent(tcp_conn_t *conn)
+{
+        switch (conn->cstate) {
+        case st_syn_received:
+        case st_established:
+                log_msg(LVL_DEBUG, "FIN sent -> Fin-Wait-1");
+                conn->cstate = st_fin_wait_1;
+                break;
+        case st_close_wait:
+                log_msg(LVL_DEBUG, "FIN sent -> Close-Wait");
+                conn->cstate = st_last_ack;
+                break;
+        default:
+                assert(false);
+        }
 }
 
@@ -734 +756 @@
                 conn->rcv_wnd--;
 
-                /* TODO Change connection state */
+                /* Change connection state */
+                switch (conn->cstate) {
+                case st_listen:
+                case st_syn_sent:
+                case st_closed:
+                        /* Connection not synchronized */
+                        assert(false);
+                case st_syn_received:
+                case st_established:
+                        log_msg(LVL_DEBUG, "FIN received -> Close-Wait");
+                        conn->cstate = st_close_wait;
+                        break;
+                case st_fin_wait_1:
+                        log_msg(LVL_DEBUG, "FIN received -> Closing");
+                        conn->cstate = st_closing;
+                        break;
+                case st_fin_wait_2:
+                        log_msg(LVL_DEBUG, "FIN received -> Time-Wait");
+                        conn->cstate = st_time_wait;
+                        /* XXX start time-wait timer */
+                        break;
+                case st_close_wait:
+                case st_closing:
+                case st_last_ack:
+                        /* Do nothing */
+                        break;
+                case st_time_wait:
+                        /* XXX Restart the 2 MSL time-wait timeout */
+                        break;
+                }
 
                 /* Add FIN to the receive buffer */