Import of uIP 1.0

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@308 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 390 insertions, 0 deletions

diff --git a/nuttx/netutils/dhcpc/dhcpc.c b/nuttx/netutils/dhcpc/dhcpc.c
new file mode 100644
index 000000000..096649b68
--- /dev/null
+++ b/nuttx/netutils/dhcpc/dhcpc.c
@@ -0,0 +1,390 @@
+/************************************************************
+ * dhcpc.c
+ *
+ *   Copyright (C) 2007 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Based heavily on portions of uIP:
+ *
+ *   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 NuttX 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 COPYRIGHT HOLDERS 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
+ * COPYRIGHT OWNER 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.
+ *
+ ************************************************************/
+
+/************************************************************
+ * Included Files
+ ************************************************************/
+
+#include <sys/types.h>
+#include <stdio.h>
+#include <string.h>
+#include <pthread.h>
+#include <time.h>
+#include <debug.h>
+
+#include <net/uip/uip.h>
+
+#include "dhcpc.h"
+
+/************************************************************
+ * Definitions
+ ************************************************************/
+
+/* CLK_TCK is the frequency of the system clock (typically 100Hz) */
+#define CLOCK_SECOND            CLK_TCK
+
+#define STATE_INITIAL           0
+#define STATE_SENDING           1
+#define STATE_OFFER_RECEIVED    2
+#define STATE_CONFIG_RECEIVED   3
+
+#define BOOTP_BROADCAST         0x8000
+
+#define DHCP_REQUEST            1
+#define DHCP_REPLY              2
+#define DHCP_HTYPE_ETHERNET     1
+#define DHCP_HLEN_ETHERNET      6
+#define DHCP_MSG_LEN            236
+
+#define DHCPC_SERVER_PORT       67
+#define DHCPC_CLIENT_PORT       68
+
+#define DHCPDISCOVER            1
+#define DHCPOFFER               2
+#define DHCPREQUEST             3
+#define DHCPDECLINE             4
+#define DHCPACK                 5
+#define DHCPNAK                 6
+#define DHCPRELEASE             7
+
+#define DHCP_OPTION_SUBNET_MASK 1
+#define DHCP_OPTION_ROUTER      3
+#define DHCP_OPTION_DNS_SERVER  6
+#define DHCP_OPTION_REQ_IPADDR  50
+#define DHCP_OPTION_LEASE_TIME  51
+#define DHCP_OPTION_MSG_TYPE    53
+#define DHCP_OPTION_SERVER_ID   54
+#define DHCP_OPTION_REQ_LIST    55
+#define DHCP_OPTION_END         255
+
+/************************************************************
+ * Private Types
+ ************************************************************/
+
+struct dhcp_msg
+{
+  uint8 op, htype, hlen, hops;
+  uint8 xid[4];
+  uint16 secs, flags;
+  uint8 ciaddr[4];
+  uint8 yiaddr[4];
+  uint8 siaddr[4];
+  uint8 giaddr[4];
+  uint8 chaddr[16];
+#ifndef CONFIG_UIP_DHCP_LIGHT
+  uint8 sname[64];
+  uint8 file[128];
+#endif
+  uint8 options[312];
+};
+
+/************************************************************
+ * Private Data
+ ************************************************************/
+
+static struct dhcpc_state s;
+
+static const uint8 xid[4] = {0xad, 0xde, 0x12, 0x23};
+static const uint8 magic_cookie[4] = {99, 130, 83, 99};
+
+/************************************************************
+ * Private Functions
+ ************************************************************/
+
+static uint8 *add_msg_type(uint8 *optptr, uint8 type)
+{
+  *optptr++ = DHCP_OPTION_MSG_TYPE;
+  *optptr++ = 1;
+  *optptr++ = type;
+  return optptr;
+}
+
+static uint8 *add_server_id(uint8 *optptr)
+{
+  *optptr++ = DHCP_OPTION_SERVER_ID;
+  *optptr++ = 4;
+  memcpy(optptr, s.serverid, 4);
+  return optptr + 4;
+}
+
+static uint8 *add_req_ipaddr(uint8 *optptr)
+{
+  *optptr++ = DHCP_OPTION_REQ_IPADDR;
+  *optptr++ = 4;
+  memcpy(optptr, s.ipaddr, 4);
+  return optptr + 4;
+}
+
+static uint8 *add_req_options(uint8 *optptr)
+{
+  *optptr++ = DHCP_OPTION_REQ_LIST;
+  *optptr++ = 3;
+  *optptr++ = DHCP_OPTION_SUBNET_MASK;
+  *optptr++ = DHCP_OPTION_ROUTER;
+  *optptr++ = DHCP_OPTION_DNS_SERVER;
+  return optptr;
+}
+
+static uint8 *add_end(uint8 *optptr)
+{
+  *optptr++ = DHCP_OPTION_END;
+  return optptr;
+}
+
+static void create_msg(register struct dhcp_msg *m)
+{
+  m->op = DHCP_REQUEST;
+  m->htype = DHCP_HTYPE_ETHERNET;
+  m->hlen = s.mac_len;
+  m->hops = 0;
+  memcpy(m->xid, xid, sizeof(m->xid));
+  m->secs = 0;
+  m->flags = HTONS(BOOTP_BROADCAST); /*  Broadcast bit. */
+  /*  uip_ipaddr_copy(m->ciaddr, uip_hostaddr);*/
+  memcpy(m->ciaddr, uip_hostaddr, sizeof(m->ciaddr));
+  memset(m->yiaddr, 0, sizeof(m->yiaddr));
+  memset(m->siaddr, 0, sizeof(m->siaddr));
+  memset(m->giaddr, 0, sizeof(m->giaddr));
+  memcpy(m->chaddr, s.mac_addr, s.mac_len);
+  memset(&m->chaddr[s.mac_len], 0, sizeof(m->chaddr) - s.mac_len);
+#ifndef CONFIG_UIP_DHCP_LIGHT
+  memset(m->sname, 0, sizeof(m->sname));
+  memset(m->file, 0, sizeof(m->file));
+#endif
+
+  memcpy(m->options, magic_cookie, sizeof(magic_cookie));
+}
+
+static void send_discover(void)
+{
+  uint8 *end;
+  struct dhcp_msg *m = (struct dhcp_msg *)uip_appdata;
+
+  create_msg(m);
+
+  end = add_msg_type(&m->options[4], DHCPDISCOVER);
+  end = add_req_options(end);
+  end = add_end(end);
+
+  uip_send(uip_appdata, end - (uint8 *)uip_appdata);
+}
+
+static void send_request(void)
+{
+  uint8 *end;
+  struct dhcp_msg *m = (struct dhcp_msg *)uip_appdata;
+
+  create_msg(m);
+
+  end = add_msg_type(&m->options[4], DHCPREQUEST);
+  end = add_server_id(end);
+  end = add_req_ipaddr(end);
+  end = add_end(end);
+
+  uip_send(uip_appdata, end - (uint8 *)uip_appdata);
+}
+
+static uint8 parse_options(uint8 *optptr, int len)
+{
+  uint8 *end = optptr + len;
+  uint8 type = 0;
+
+  while (optptr < end)
+    {
+      switch(*optptr)
+        {
+          case DHCP_OPTION_SUBNET_MASK:
+            memcpy(s.netmask, optptr + 2, 4);
+            break;
+          case DHCP_OPTION_ROUTER:
+            memcpy(s.default_router, optptr + 2, 4);
+            break;
+          case DHCP_OPTION_DNS_SERVER:
+            memcpy(s.dnsaddr, optptr + 2, 4);
+            break;
+          case DHCP_OPTION_MSG_TYPE:
+            type = *(optptr + 2);
+            break;
+          case DHCP_OPTION_SERVER_ID:
+            memcpy(s.serverid, optptr + 2, 4);
+            break;
+          case DHCP_OPTION_LEASE_TIME:
+            memcpy(s.lease_time, optptr + 2, 4);
+            break;
+          case DHCP_OPTION_END:
+            return type;
+        }
+
+      optptr += optptr[1] + 2;
+    }
+  return type;
+}
+
+static uint8 parse_msg(void)
+{
+  struct dhcp_msg *m = (struct dhcp_msg *)uip_appdata;
+
+  if (m->op == DHCP_REPLY &&
+     memcmp(m->xid, xid, sizeof(xid)) == 0 &&
+     memcmp(m->chaddr, s.mac_addr, s.mac_len) == 0)
+    {
+      memcpy(s.ipaddr, m->yiaddr, 4);
+      return parse_options(&m->options[4], uip_datalen());
+    }
+  return 0;
+}
+
+static void handle_dhcp(void)
+{
+restart:
+  s.state = STATE_SENDING;
+  s.ticks = CLOCK_SECOND;
+
+  do
+    {
+      /* Send the command */
+
+      send_discover();
+
+      /* Wait for the response */
+
+      uip_event_timedwait(UIP_NEWDATA, CLOCK_SECOND);
+
+      if (uip_newdata() && parse_msg() == DHCPOFFER)
+        {
+          s.state = STATE_OFFER_RECEIVED;
+          break;
+        }
+
+      if (s.ticks < CLOCK_SECOND * 60)
+        {
+          s.ticks *= 2;
+        }
+    }
+  while(s.state != STATE_OFFER_RECEIVED);
+
+  s.ticks = CLOCK_SECOND;
+
+  do
+    {
+      /* Send the request */
+
+      send_request();
+
+      /* Then wait to received the response */
+
+      uip_event_timedwait(UIP_NEWDATA, CLOCK_SECOND);
+
+      if (uip_newdata() && parse_msg() == DHCPACK)
+        {
+          s.state = STATE_CONFIG_RECEIVED;
+          break;
+        }
+
+      if (s.ticks <= CLOCK_SECOND * 10)
+        {
+          s.ticks += CLOCK_SECOND;
+        }
+      else
+        {
+          goto restart;
+        }
+    }
+  while(s.state != STATE_CONFIG_RECEIVED);
+
+  dbg("Got IP address %d.%d.%d.%d\n",
+      uip_ipaddr1(s.ipaddr), uip_ipaddr2(s.ipaddr),
+      uip_ipaddr3(s.ipaddr), uip_ipaddr4(s.ipaddr));
+  dbg("Got netmask %d.%d.%d.%d\n",
+      uip_ipaddr1(s.netmask), uip_ipaddr2(s.netmask),
+      uip_ipaddr3(s.netmask), uip_ipaddr4(s.netmask));
+  dbg("Got DNS server %d.%d.%d.%d\n",
+      uip_ipaddr1(s.dnsaddr), uip_ipaddr2(s.dnsaddr),
+      uip_ipaddr3(s.dnsaddr), uip_ipaddr4(s.dnsaddr));
+  dbg("Got default router %d.%d.%d.%d\n",
+      uip_ipaddr1(s.default_router), uip_ipaddr2(s.default_router),
+      uip_ipaddr3(s.default_router), uip_ipaddr4(s.default_router));
+  dbg("Lease expires in %ld seconds\n",
+      ntohs(s.lease_time[0])*65536ul + ntohs(s.lease_time[1]));
+
+  dhcpc_configured(&s);
+
+  pthread_exit(NULL);
+}
+
+/************************************************************
+ * Global Functions
+ ************************************************************/
+
+void dhcpc_init(const void *mac_addr, int mac_len)
+{
+  uip_ipaddr_t addr;
+
+  s.mac_addr = mac_addr;
+  s.mac_len  = mac_len;
+
+  s.state = STATE_INITIAL;
+  uip_ipaddr(addr, 255,255,255,255);
+  s.conn = uip_udp_new(&addr, HTONS(DHCPC_SERVER_PORT));
+  if (s.conn != NULL)
+    {
+      uip_udp_bind(s.conn, HTONS(DHCPC_CLIENT_PORT));
+    }
+}
+
+/* This function is called by the UIP interrupt handling logic whenevent an
+ * event of interest occurs.
+ */
+
+void uip_interrupt_udp_event(void)
+{
+  handle_dhcp();
+}
+
+void dhcpc_request(void)
+{
+  uint16 ipaddr[2];
+
+  if (s.state == STATE_INITIAL)
+    {
+      uip_ipaddr(ipaddr, 0,0,0,0);
+      uip_sethostaddr(ipaddr);
+    }
+}