initial commit

3 files changed, 425 insertions, 0 deletions

diff --git a/uip/apps/dhcpc/Makefile.dhcpc b/uip/apps/dhcpc/Makefile.dhcpc
new file mode 100644
index 0000000..f84c84f
--- /dev/null
+++ b/uip/apps/dhcpc/Makefile.dhcpc
@@ -0,0 +1 @@
+APP_SOURCES += dhcpc.c timer.c
diff --git a/uip/apps/dhcpc/dhcpc.c b/uip/apps/dhcpc/dhcpc.c
new file mode 100644
index 0000000..ac738e7
--- /dev/null
+++ b/uip/apps/dhcpc/dhcpc.c
@@ -0,0 +1,356 @@
+/*
+ * 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 uIP TCP/IP stack
+ *
+ * @(#)$Id: dhcpc.c,v 1.2 2006/06/11 21:46:37 adam Exp $
+ */
+
+#include <stdio.h>
+#include <string.h>
+
+#include "uip.h"
+#include "dhcpc.h"
+#include "timer.h"
+#include "pt.h"
+
+#define STATE_INITIAL         0
+#define STATE_SENDING         1
+#define STATE_OFFER_RECEIVED  2
+#define STATE_CONFIG_RECEIVED 3
+
+static struct dhcpc_state s;
+
+struct dhcp_msg {
+  u8_t op, htype, hlen, hops;
+  u8_t xid[4];
+  u16_t secs, flags;
+  u8_t ciaddr[4];
+  u8_t yiaddr[4];
+  u8_t siaddr[4];
+  u8_t giaddr[4];
+  u8_t chaddr[16];
+#ifndef UIP_CONF_DHCP_LIGHT
+  u8_t sname[64];
+  u8_t file[128];
+#endif
+  u8_t options[312];
+};
+
+#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
+
+static const u8_t xid[4] = {0xad, 0xde, 0x12, 0x23};
+static const u8_t magic_cookie[4] = {99, 130, 83, 99};
+/*---------------------------------------------------------------------------*/
+static u8_t *
+add_msg_type(u8_t *optptr, u8_t type)
+{
+  *optptr++ = DHCP_OPTION_MSG_TYPE;
+  *optptr++ = 1;
+  *optptr++ = type;
+  return optptr;
+}
+/*---------------------------------------------------------------------------*/
+static u8_t *
+add_server_id(u8_t *optptr)
+{
+  *optptr++ = DHCP_OPTION_SERVER_ID;
+  *optptr++ = 4;
+  memcpy(optptr, s.serverid, 4);
+  return optptr + 4;
+}
+/*---------------------------------------------------------------------------*/
+static u8_t *
+add_req_ipaddr(u8_t *optptr)
+{
+  *optptr++ = DHCP_OPTION_REQ_IPADDR;
+  *optptr++ = 4;
+  memcpy(optptr, s.ipaddr, 4);
+  return optptr + 4;
+}
+/*---------------------------------------------------------------------------*/
+static u8_t *
+add_req_options(u8_t *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 u8_t *
+add_end(u8_t *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 UIP_CONF_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)
+{
+  u8_t *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 - (u8_t *)uip_appdata);
+}
+/*---------------------------------------------------------------------------*/
+static void
+send_request(void)
+{
+  u8_t *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 - (u8_t *)uip_appdata);
+}
+/*---------------------------------------------------------------------------*/
+static u8_t
+parse_options(u8_t *optptr, int len)
+{
+  u8_t *end = optptr + len;
+  u8_t 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 u8_t
+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
+PT_THREAD(handle_dhcp(void))
+{
+  PT_BEGIN(&s.pt);
+  
+  /* try_again:*/
+  s.state = STATE_SENDING;
+  s.ticks = CLOCK_SECOND;
+
+  do {
+    send_discover();
+    timer_set(&s.timer, s.ticks);
+    PT_WAIT_UNTIL(&s.pt, uip_newdata() || timer_expired(&s.timer));
+
+    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_request();
+    timer_set(&s.timer, s.ticks);
+    PT_WAIT_UNTIL(&s.pt, uip_newdata() || timer_expired(&s.timer));
+
+    if(uip_newdata() && parse_msg() == DHCPACK) {
+      s.state = STATE_CONFIG_RECEIVED;
+      break;
+    }
+
+    if(s.ticks <= CLOCK_SECOND * 10) {
+      s.ticks += CLOCK_SECOND;
+    } else {
+      PT_RESTART(&s.pt);
+    }
+  } while(s.state != STATE_CONFIG_RECEIVED);
+  
+#if 0
+  printf("Got IP address %d.%d.%d.%d\n",
+	 uip_ipaddr1(s.ipaddr), uip_ipaddr2(s.ipaddr),
+	 uip_ipaddr3(s.ipaddr), uip_ipaddr4(s.ipaddr));
+  printf("Got netmask %d.%d.%d.%d\n",
+	 uip_ipaddr1(s.netmask), uip_ipaddr2(s.netmask),
+	 uip_ipaddr3(s.netmask), uip_ipaddr4(s.netmask));
+  printf("Got DNS server %d.%d.%d.%d\n",
+	 uip_ipaddr1(s.dnsaddr), uip_ipaddr2(s.dnsaddr),
+	 uip_ipaddr3(s.dnsaddr), uip_ipaddr4(s.dnsaddr));
+  printf("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));
+  printf("Lease expires in %ld seconds\n",
+	 ntohs(s.lease_time[0])*65536ul + ntohs(s.lease_time[1]));
+#endif
+
+  dhcpc_configured(&s);
+  
+  /*  timer_stop(&s.timer);*/
+
+  /*
+   * PT_END restarts the thread so we do this instead. Eventually we
+   * should reacquire expired leases here.
+   */
+  while(1) {
+    PT_YIELD(&s.pt);
+  }
+
+  PT_END(&s.pt);
+}
+/*---------------------------------------------------------------------------*/
+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));
+  }
+  PT_INIT(&s.pt);
+}
+/*---------------------------------------------------------------------------*/
+void
+dhcpc_appcall(void)
+{
+  handle_dhcp();
+}
+/*---------------------------------------------------------------------------*/
+void
+dhcpc_request(void)
+{
+  u16_t ipaddr[2];
+  
+  if(s.state == STATE_INITIAL) {
+    uip_ipaddr(ipaddr, 0,0,0,0);
+    uip_sethostaddr(ipaddr);
+    /*    handle_dhcp(PROCESS_EVENT_NONE, NULL);*/
+  }
+}
+/*---------------------------------------------------------------------------*/
diff --git a/uip/apps/dhcpc/dhcpc.h b/uip/apps/dhcpc/dhcpc.h
new file mode 100644
index 0000000..c6550ec
--- /dev/null
+++ b/uip/apps/dhcpc/dhcpc.h
@@ -0,0 +1,68 @@
+/*
+ * 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 uIP TCP/IP stack
+ *
+ * @(#)$Id: dhcpc.h,v 1.3 2006/06/11 21:46:37 adam Exp $
+ */
+#ifndef __DHCPC_H__
+#define __DHCPC_H__
+
+#include "timer.h"
+#include "pt.h"
+
+struct dhcpc_state {
+  struct pt pt;
+  char state;
+  struct uip_udp_conn *conn;
+  struct timer timer;
+  u16_t ticks;
+  const void *mac_addr;
+  int mac_len;
+  
+  u8_t serverid[4];
+
+  u16_t lease_time[2];
+  u16_t ipaddr[2];
+  u16_t netmask[2];
+  u16_t dnsaddr[2];
+  u16_t default_router[2];
+};
+
+void dhcpc_init(const void *mac_addr, int mac_len);
+void dhcpc_request(void);
+
+void dhcpc_appcall(void);
+
+void dhcpc_configured(const struct dhcpc_state *s);
+
+typedef struct dhcpc_state uip_udp_appstate_t;
+#define UIP_UDP_APPCALL dhcpc_appcall
+
+
+#endif /* __DHCPC_H__ */