Daniele Lacamera / PicoTCP Featured

Free (GPLv2) TCP/IP stack developed by TASS Belgium

Dependents:   lpc1768-picotcp-demo ZeroMQ_PicoTCP_Publisher_demo TCPSocket_HelloWorld_PicoTCP Pico_TCP_UDP_Test ... more

PicoTCP. Copyright (c) 2013 TASS Belgium NV.

Released under the GNU General Public License, version 2.

Different licensing models may exist, at the sole discretion of the Copyright holders.

Official homepage: http://www.picotcp.com

Bug tracker: https://github.com/tass-belgium/picotcp/issues

Development steps:

  • initial integration with mbed RTOS
  • generic mbed Ethernet driver
  • high performance NXP LPC1768 specific Ethernet driver
  • Multi-threading support for mbed RTOS
  • Berkeley sockets and integration with the New Socket API
  • Fork of the apps running on top of the New Socket API
  • Scheduling optimizations
  • Debugging/benchmarking/testing

Demo application (measuring TCP sender performance):

Import programlpc1768-picotcp-demo

A PicoTCP demo app testing the ethernet throughput on the lpc1768 mbed board.

Last commit 17 May 2013 by TASS Belgium

Diff: modules/pico_tcp.c

Revision:
32:865c101e0874
Parent:
29:1a47b7151851
Child:
36:afa3ab5e06b3
--- a/modules/pico_tcp.c	Sun Jun 16 20:27:04 2013 +0000
+++ b/modules/pico_tcp.c	Thu Jun 20 12:36:39 2013 +0000
@@ -294,6 +294,7 @@
   return pico_dualbuffer_checksum(&pseudo, sizeof(struct pico_ipv4_pseudo_hdr), tcp_hdr, f->transport_len);
 }
 
+static void tcp_send_fin(struct pico_socket_tcp *t);
 static int pico_tcp_process_out(struct pico_protocol *self, struct pico_frame *f)
 {
   struct pico_tcp_hdr *hdr;
@@ -316,6 +317,7 @@
   } else {
     tcp_dbg("%s: non-pure ACK with len=0, fl:%04x\n", __FUNCTION__, hdr->flags);
   }
+
   pico_network_send(f);
   return 0;
 }
@@ -1235,7 +1237,8 @@
   struct pico_frame *f = NULL;
   unsigned long limit = val - t->rto;
   struct pico_tcp_hdr *hdr;
-  if(t->sock.net && ((t->sock.state & 0xFF00) == PICO_SOCKET_STATE_TCP_ESTABLISHED))
+  if( t->sock.net && ((t->sock.state & 0xFF00) == PICO_SOCKET_STATE_TCP_ESTABLISHED
+        || (t->sock.state & 0xFF00) == PICO_SOCKET_STATE_TCP_CLOSE_WAIT) )
   {
         tcp_dbg("\n\nTIMEOUT! backoff = %d\n", t->backoff);
         /* was timer cancelled? */
@@ -1737,6 +1740,7 @@
   struct pico_socket_tcp *t = (struct pico_socket_tcp *)s;
   struct pico_tcp_hdr *hdr  = (struct pico_tcp_hdr *) (f->transport_hdr);
 
+
   if (f->payload_len > 0)
     tcp_data_in(s,f);
   if (f->flags & PICO_TCP_ACK)
@@ -1744,11 +1748,12 @@
   if (seq_compare(SEQN(f), t->rcv_nxt) == 0) {
     /* received FIN, increase ACK nr */
     t->rcv_nxt = long_be(hdr->seq) + 1;
-    s->state &= 0x00FFU;
-    s->state |= PICO_SOCKET_STATE_TCP_CLOSE_WAIT;
-    /* set SHUT_REMOTE */
+        s->state &= 0x00FFU;
+        s->state |= PICO_SOCKET_STATE_TCP_CLOSE_WAIT;
+        /* set SHUT_REMOTE */
     s->state |= PICO_SOCKET_STATE_SHUT_REMOTE;
       tcp_dbg("TCP> Close-wait\n");
+
     if (s->wakeup){
       if(f->payload_len>0){
         struct pico_socket_tcp *t = (struct pico_socket_tcp *)s;
@@ -1892,7 +1897,7 @@
   { PICO_SOCKET_STATE_TCP_SYN_SENT,     &tcp_nosync_rst, &tcp_synack,     &tcp_nosync_rst,   &tcp_nosync_rst, &tcp_nosync_rst, &tcp_nosync_rst, &tcp_rst },
   { PICO_SOCKET_STATE_TCP_SYN_RECV,     &tcp_nosync_rst, &tcp_nosync_rst,   &tcp_first_ack,    &tcp_nosync_rst, &tcp_nosync_rst, &tcp_nosync_rst, &tcp_rst },
   { PICO_SOCKET_STATE_TCP_ESTABLISHED,  &tcp_send_rst,   &tcp_send_rst,     &tcp_ack,          &tcp_data_in,    &tcp_closewait,  &tcp_closewait,  &tcp_rst },
-  { PICO_SOCKET_STATE_TCP_CLOSE_WAIT,   &tcp_send_rst,   &tcp_send_rst,     &tcp_ack,          &tcp_send_rst,   &tcp_send_rst,   &tcp_send_rst,   &tcp_rst },
+  { PICO_SOCKET_STATE_TCP_CLOSE_WAIT,   &tcp_send_rst,   &tcp_send_rst,     &tcp_ack,          &tcp_send_rst,   &tcp_closewait,  &tcp_closewait,   &tcp_rst },
   { PICO_SOCKET_STATE_TCP_LAST_ACK,     &tcp_send_rst,   &tcp_send_rst,     &tcp_lastackwait,  &tcp_send_rst,   &tcp_send_rst,   &tcp_send_rst,   &tcp_rst },
   { PICO_SOCKET_STATE_TCP_FIN_WAIT1,    &tcp_send_rst,   &tcp_send_rst,     &tcp_finwaitack,   &tcp_data_in,    &tcp_rcvfin,     &tcp_finack,     &tcp_rst },
   { PICO_SOCKET_STATE_TCP_FIN_WAIT2,    &tcp_send_rst,   &tcp_send_rst,     &tcp_ack,          &tcp_data_in,    &tcp_finwaitfin, &tcp_finack,     &tcp_rst },