147 lines
4.2 KiB
C
147 lines
4.2 KiB
C
/*
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* Copyright (c) 2005, Swedish Institute of Computer Science
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*
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* @(#)$Id: tcp_loader.c,v 1.2 2006/08/02 14:33:37 bg- Exp $
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*/
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#include <stdio.h>
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#include <string.h>
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#include "contiki.h"
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#include "sys/etimer.h"
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#include "loader/elfloader.h"
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#include "net/uip.h"
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#include "dev/xmem.h"
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#include "codeprop.h"
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#define PRINTF(x)
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PROCESS(tcp_loader_process, "TCP loader");
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static
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struct codeprop_state {
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u16_t addr;
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u16_t len;
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struct pt tcpthread_pt;
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} s;
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/*---------------------------------------------------------------------*/
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static
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PT_THREAD(recv_tcpthread(struct pt *pt))
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{
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PT_BEGIN(pt);
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/* Read the header. */
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PT_WAIT_UNTIL(pt, uip_newdata() && uip_datalen() > 0);
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if(uip_datalen() < sizeof(struct codeprop_tcphdr)) {
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PRINTF(("codeprop: header not found in first tcp segment\n"));
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uip_abort();
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goto thread_done;
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}
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s.len = htons(((struct codeprop_tcphdr *)uip_appdata)->len);
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s.addr = 0;
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uip_appdata += sizeof(struct codeprop_tcphdr);
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uip_len -= sizeof(struct codeprop_tcphdr);
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xmem_erase(XMEM_ERASE_UNIT_SIZE, EEPROMFS_ADDR_CODEPROP);
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/* Read the rest of the data. */
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do {
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if(uip_len > 0) {
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xmem_pwrite(uip_appdata, uip_len, EEPROMFS_ADDR_CODEPROP + s.addr);
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s.addr += uip_len;
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}
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if(s.addr < s.len) {
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PT_YIELD_UNTIL(pt, uip_newdata());
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}
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} while(s.addr < s.len);
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/* Kill old program. */
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elfloader_unload();
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/* Link, load, and start new program. */
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int s;
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static char msg[30 + 10];
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s = elfloader_load(EEPROMFS_ADDR_CODEPROP);
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if (s == ELFLOADER_OK)
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sprintf(msg, "ok\n");
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else
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sprintf(msg, "err %d %s\n", s, elfloader_unknown);
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/* Return "ok" message. */
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do {
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s = strlen(msg);
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uip_send(msg, s);
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PT_WAIT_UNTIL(pt, uip_acked() || uip_rexmit() || uip_closed());
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} while(uip_rexmit());
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/* Close the connection. */
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uip_close();
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thread_done:;
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PT_END(pt);
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}
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/*---------------------------------------------------------------------*/
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PROCESS_THREAD(tcp_loader_process, ev, data)
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{
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PROCESS_BEGIN();
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tcp_listen(HTONS(CODEPROP_DATA_PORT));
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while(1) {
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PROCESS_YIELD();
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if(ev == tcpip_event && uip_conn->lport == HTONS(CODEPROP_DATA_PORT)) {
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if(uip_connected()) { /* Really uip_connecting()!!! */
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if(data == NULL) {
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PT_INIT(&s.tcpthread_pt);
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process_poll(&tcp_loader_process);
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tcp_markconn(uip_conn, &s);
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} else {
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PRINTF(("codeprop: uip_connected() and data != NULL\n"));
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uip_abort();
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}
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}
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recv_tcpthread(&s.tcpthread_pt); /* Run thread */
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if(uip_closed() || uip_aborted() || uip_timedout()) {
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PRINTF(("codeprop: connection down\n"));
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tcp_markconn(uip_conn, NULL);
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}
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}
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}
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PROCESS_END();
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}
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