Daniele Lacamera / PicoTCP-Experimental_CDC_ECM_Branch

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

Fork of PicoTCP by Daniele Lacamera

modules/pico_dev_loop.c@1:cfe8984a32b4, 2013-05-17 (annotated)

Committer:
tass
Date:
Fri May 17 12:09:59 2013 +0000
Revision:
1:cfe8984a32b4
Parent:
libraries/picotcp/modules/pico_dev_loop.c@0:d7f2341ab245 
Update for smaller SOCKETQ

Who changed what in which revision?

UserRevisionLine numberNew contents of line
daniele 0:d7f2341ab245 1 /*********************************************************************
daniele 0:d7f2341ab245 2 PicoTCP. Copyright (c) 2012 TASS Belgium NV. Some rights reserved.
daniele 0:d7f2341ab245 3 See LICENSE and COPYING for usage.
daniele 0:d7f2341ab245 4
daniele 0:d7f2341ab245 5 Authors: Daniele Lacamera
daniele 0:d7f2341ab245 6 *********************************************************************/
daniele 0:d7f2341ab245 7
daniele 0:d7f2341ab245 8
daniele 0:d7f2341ab245 9 #include "pico_device.h"
daniele 0:d7f2341ab245 10 #include "pico_dev_loop.h"
daniele 0:d7f2341ab245 11 #include "pico_stack.h"
daniele 0:d7f2341ab245 12
daniele 0:d7f2341ab245 13
daniele 0:d7f2341ab245 14 #define LOOP_MTU 1500
daniele 0:d7f2341ab245 15 static uint8_t l_buf[LOOP_MTU];
daniele 0:d7f2341ab245 16 static int l_bufsize = 0;
daniele 0:d7f2341ab245 17
daniele 0:d7f2341ab245 18
daniele 0:d7f2341ab245 19 static int pico_loop_send(struct pico_device *dev, void *buf, int len)
daniele 0:d7f2341ab245 20 {
daniele 0:d7f2341ab245 21 if (len > LOOP_MTU)
daniele 0:d7f2341ab245 22 return 0;
daniele 0:d7f2341ab245 23
daniele 0:d7f2341ab245 24 if (l_bufsize == 0) {
daniele 0:d7f2341ab245 25 memcpy(l_buf, buf, len);
daniele 0:d7f2341ab245 26 l_bufsize+=len;
daniele 0:d7f2341ab245 27 return len;
daniele 0:d7f2341ab245 28 }
daniele 0:d7f2341ab245 29 return 0;
daniele 0:d7f2341ab245 30 }
daniele 0:d7f2341ab245 31
daniele 0:d7f2341ab245 32 static int pico_loop_poll(struct pico_device *dev, int loop_score)
daniele 0:d7f2341ab245 33 {
daniele 0:d7f2341ab245 34 if (loop_score <= 0)
daniele 0:d7f2341ab245 35 return 0;
daniele 0:d7f2341ab245 36
daniele 0:d7f2341ab245 37 if (l_bufsize > 0) {
daniele 0:d7f2341ab245 38 pico_stack_recv(dev, l_buf, l_bufsize);
daniele 0:d7f2341ab245 39 l_bufsize = 0;
daniele 0:d7f2341ab245 40 loop_score--;
daniele 0:d7f2341ab245 41 }
daniele 0:d7f2341ab245 42 return loop_score;
daniele 0:d7f2341ab245 43 }
daniele 0:d7f2341ab245 44
daniele 0:d7f2341ab245 45 /* Public interface: create/destroy. */
daniele 0:d7f2341ab245 46
daniele 0:d7f2341ab245 47 void pico_loop_destroy(struct pico_device *dev)
daniele 0:d7f2341ab245 48 {
daniele 0:d7f2341ab245 49 }
daniele 0:d7f2341ab245 50
daniele 0:d7f2341ab245 51 struct pico_device *pico_loop_create(void)
daniele 0:d7f2341ab245 52 {
daniele 0:d7f2341ab245 53 struct pico_device *loop = pico_zalloc(sizeof(struct pico_device));
daniele 0:d7f2341ab245 54 if (!loop)
daniele 0:d7f2341ab245 55 return NULL;
daniele 0:d7f2341ab245 56
daniele 0:d7f2341ab245 57 if( 0 != pico_device_init((struct pico_device *)loop, "loop", NULL)) {
daniele 0:d7f2341ab245 58 dbg ("Loop init failed.\n");
daniele 0:d7f2341ab245 59 pico_loop_destroy((struct pico_device *)loop);
daniele 0:d7f2341ab245 60 return NULL;
daniele 0:d7f2341ab245 61 }
daniele 0:d7f2341ab245 62 loop->send = pico_loop_send;
daniele 0:d7f2341ab245 63 loop->poll = pico_loop_poll;
daniele 0:d7f2341ab245 64 loop->destroy = pico_loop_destroy;
daniele 0:d7f2341ab245 65 dbg("Device %s created.\n", loop->name);
daniele 0:d7f2341ab245 66 return (struct pico_device *)loop;
daniele 0:d7f2341ab245 67 }
daniele 0:d7f2341ab245 68