More'or less a verbatim copy of the traditional elfloader but built

upon cmod and cle.

apps/codeprop/tcp_loader2.c

@@ -0,0 +1,149 @@
+/*
+ * Copyright (c) 2005, Swedish Institute of Computer Science
+ * All rights reserved. 
+ *
+ * Redistribution and use in source and binary forms, with or without 
+ * modification, are permitted provided that the following conditions 
+ * are met: 
+ * 1. Redistributions of source code must retain the above copyright 
+ *    notice, this list of conditions and the following disclaimer. 
+ * 2. Redistributions in binary form must reproduce the above copyright 
+ *    notice, this list of conditions and the following disclaimer in the 
+ *    documentation and/or other materials provided with the distribution. 
+ * 3. Neither the name of the Institute nor the names of its contributors 
+ *    may be used to endorse or promote products derived from this software 
+ *    without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
+ * SUCH DAMAGE. 
+ *
+ * This file is part of the Contiki operating system.
+ *
+ * @(#)$Id: tcp_loader2.c,v 1.1 2007/01/05 17:46:26 bg- Exp $
+ */
+
+#include <stdio.h>
+#include <string.h>
+
+#include "contiki.h"
+#include "sys/etimer.h"
+
+#include "loader/cle.h"
+#include "loader/cmod.h"
+
+#include "net/uip.h"
+
+#include "dev/xmem.h"
+
+#include "codeprop.h"
+
+#define PRINTF(x)
+
+PROCESS(tcp_loader_process, "TCP loader");
+
+static
+struct codeprop_state {
+  u16_t addr;
+  u16_t len;
+  struct pt tcpthread_pt;
+} s;
+
+/*---------------------------------------------------------------------*/
+static
+PT_THREAD(recv_tcpthread(struct pt *pt))
+{
+  PT_BEGIN(pt);
+
+  /* Read the header. */
+  PT_WAIT_UNTIL(pt, uip_newdata() && uip_datalen() > 0);
+
+  if(uip_datalen() < sizeof(struct codeprop_tcphdr)) {
+    PRINTF(("codeprop: header not found in first tcp segment\n"));
+    uip_abort();
+    goto thread_done;
+  }
+
+  s.len = htons(((struct codeprop_tcphdr *)uip_appdata)->len);
+  s.addr = 0;
+  uip_appdata += sizeof(struct codeprop_tcphdr);
+  uip_len -= sizeof(struct codeprop_tcphdr);
+
+  xmem_erase(XMEM_ERASE_UNIT_SIZE, EEPROMFS_ADDR_CODEPROP);
+
+  /* Read the rest of the data. */
+  do {      
+    if(uip_len > 0) {
+      xmem_pwrite(uip_appdata, uip_len, EEPROMFS_ADDR_CODEPROP + s.addr);
+      s.addr += uip_len;
+    }
+    if(s.addr < s.len) {
+      PT_YIELD_UNTIL(pt, uip_newdata());
+    }	
+  } while(s.addr < s.len);
+
+  /* Kill old program. */
+  cmod_unload(0);
+
+  /* Link, load, and start new program. */
+  int s;
+  static char msg[30 + 10];
+  cle_scratch elfloader_unknown;
+  s = cmod_load(0, elfloader_unknown, xmem_pread, EEPROMFS_ADDR_CODEPROP);
+  if (s == CMOD_OK)
+    sprintf(msg, "ok\n");
+  else
+    sprintf(msg, "err %d %s\n", s, elfloader_unknown);
+    
+  /* Return "ok" message. */
+  do {
+    s = strlen(msg);
+    uip_send(msg, s);
+    PT_WAIT_UNTIL(pt, uip_acked() || uip_rexmit() || uip_closed());
+  } while(uip_rexmit());
+
+  /* Close the connection. */
+  uip_close();
+    
+ thread_done:;
+  PT_END(pt);
+}
+/*---------------------------------------------------------------------*/
+PROCESS_THREAD(tcp_loader_process, ev, data)
+{
+  PROCESS_BEGIN();
+  
+  tcp_listen(HTONS(CODEPROP_DATA_PORT));
+  
+  while(1) {
+    PROCESS_YIELD();
+    if(ev == tcpip_event && uip_conn->lport == HTONS(CODEPROP_DATA_PORT)) {
+      if(uip_connected()) {	/* Really uip_connecting()!!! */
+	if(data == NULL) {
+	  PT_INIT(&s.tcpthread_pt);
+	  process_poll(&tcp_loader_process);
+	  tcp_markconn(uip_conn, &s);
+	} else {
+	  PRINTF(("codeprop: uip_connected() and data != NULL\n"));
+	  uip_abort();
+	}
+      }
+      recv_tcpthread(&s.tcpthread_pt); /* Run thread */
+
+      if(uip_closed() || uip_aborted() || uip_timedout()) {
+	PRINTF(("codeprop: connection down\n"));
+	tcp_markconn(uip_conn, NULL);
+      }
+    }
+  }
+
+  PROCESS_END();
+}