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: Socket/bsd/stack_endpoint.cpp

Revision:
32:865c101e0874
Parent:
29:1a47b7151851
Child:
33:d8af3f85a484
--- a/Socket/bsd/stack_endpoint.cpp	Sun Jun 16 20:27:04 2013 +0000
+++ b/Socket/bsd/stack_endpoint.cpp	Thu Jun 20 12:36:39 2013 +0000
@@ -15,6 +15,9 @@
 //#define ptsock_dbg printf
 #define ptsock_dbg(...)
 
+#define TRUE  1
+#define FALSE 0
+
 int in_the_stack = 0;
 Mutex *PicoTcpLock;
 Queue<void,16> *PicoTcpEvents;
@@ -34,22 +37,22 @@
  * WARNING: PicoTcpLock (big stack lock) must be acquired before entering this.
  */
 
-static inline int __critical_select(struct stack_endpoint *ep, uint32_t time)
+static inline int __critical_select(struct stack_endpoint *ep, uint32_t time, uint8_t lock)
 {
   int retval = 0;
   uint16_t ev = ep->revents;
   uint32_t in_time = PICO_TIME_MS();
   
-  PicoTcpLock->unlock();
+  if(lock) PicoTcpLock->unlock();
   while ((ep->events & ep->revents) == 0) {
     ep->queue->get(time);
     if ((time != osWaitForever) && (PICO_TIME_MS() > in_time + time)) {
         printf("TIMEOUT in critical select... (ev:%04x rev:%04x \n", ep->events, ep->revents);
-        PicoTcpLock->lock();
+        if(lock) PicoTcpLock->lock();
         return 0;
     }
   }
-  PicoTcpLock->lock();
+  if(lock) PicoTcpLock->lock();
   return 1;
 }
 
@@ -69,6 +72,16 @@
   //  printf("Activating RD\n");
   ep->revents |= ev;
 
+  if(ev & PICO_SOCK_EV_ERR)
+  {
+    if(pico_err == PICO_ERR_ECONNRESET)
+    {   
+      printf("Connection reset by peer...\n");
+      ep->state = SOCK_RESET_BY_PEER;
+      pico_socket_close(ep->s);
+      ep->s->priv = NULL;
+    }
+  }
   if ((ev & PICO_SOCK_EV_CLOSE) || (ev & PICO_SOCK_EV_FIN)) {
     ep->connected = 0;
   }
@@ -146,7 +159,7 @@
   PicoTcpLock->lock();
   pico_socket_connect(ep->s, (struct pico_ip4 *)(&srv_addr->sin_addr.s_addr), srv_addr->sin_port);
   ep->events = PICO_SOCK_EV_CONN | PICO_SOCK_EV_ERR;
-  __critical_select(ep, osWaitForever);
+  __critical_select(ep, osWaitForever, TRUE);
   if ((ep->revents & PICO_SOCK_EV_CONN) && ep->connected) {
     ep->revents &= (~PICO_SOCK_EV_CONN);
     ep->revents |= PICO_SOCK_EV_WR;
@@ -174,13 +187,14 @@
   
   PicoTcpLock->lock();
   ep->events = PICO_SOCK_EV_CONN | PICO_SOCK_EV_ERR;
-  __critical_select(ep, osWaitForever);
+  __critical_select(ep, osWaitForever, TRUE);
   if (ep->revents & PICO_SOCK_EV_CONN) {
     printf("Calling Accept\n");
     aep->s = pico_socket_accept(ep->s, (struct pico_ip4 *)(&cli_addr->sin_addr.s_addr), &cli_addr->sin_port);
     printf("Accept returned\n");
     aep->s->priv = aep;
     ep->revents &= (~PICO_SOCK_EV_CONN);
+    aep->revents = 0; // set this to 0 to allow seq connections
     aep->revents |= PICO_SOCK_EV_WR;
     printf("Added socket (accept)\n");
     
@@ -207,7 +221,7 @@
   }
   if (write)
     ep->events |= PICO_SOCK_EV_WR;
-  ret = __critical_select(ep, ep->timeout);
+  ret = __critical_select(ep, ep->timeout,FALSE);
   return ret;
 }
 
@@ -303,8 +317,11 @@
 int picotcp_close(struct stack_endpoint *ep)
 {
   PicoTcpLock->lock();
-  pico_socket_close(ep->s);
-  ep->s->priv = NULL;
+  if(ep->state != SOCK_RESET_BY_PEER)
+  {
+    pico_socket_close(ep->s);
+    ep->s->priv = NULL;
+  }
   printf("Socket closed!\n");
   delete(ep->queue);
   pico_free(ep);