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_icmp4.c

Revision:
46:c35c84e301e0
Parent:
29:1a47b7151851
Child:
51:ab4529a384a6
--- a/modules/pico_icmp4.c	Tue Jul 23 13:22:24 2013 +0000
+++ b/modules/pico_icmp4.c	Thu Jul 25 08:43:55 2013 +0000
@@ -44,16 +44,10 @@
   struct pico_icmp4_hdr *hdr = (struct pico_icmp4_hdr *) f->transport_hdr;
   if (hdr->type == PICO_ICMP_ECHO) {
     hdr->type = PICO_ICMP_ECHOREPLY;
-    /* Ugly, but the best way to get ICMP data size here. */
-    f->transport_len = f->buffer_len - PICO_SIZE_IP4HDR;
-    if (f->dev->eth)
-      f->transport_len -= PICO_SIZE_ETHHDR;
-    pico_icmp4_checksum(f);
-    f->net_hdr = f->transport_hdr - PICO_SIZE_IP4HDR;
-    f->start = f->net_hdr;
-    f->len = f->buffer_len;
+    /* outgoing frames require a f->len without the ethernet header len */
     if (f->dev->eth)
       f->len -= PICO_SIZE_ETHHDR;
+    pico_icmp4_checksum(f);
     pico_ipv4_rebound(f);
   } else if (hdr->type == PICO_ICMP_UNREACH) {
     f->net_hdr = f->transport_hdr + PICO_ICMPHDR_UN_SIZE;