cpu/6502/dhcp/dhcp-client.c

   1 /*
   2  * Copyright (c) 2002, Adam Dunkels.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above
  11  *    copyright notice, this list of conditions and the following
  12  *    disclaimer in the documentation and/or other materials provided
  13  *    with the distribution.
  14  * 3. The name of the author may not be used to endorse or promote
  15  *    products derived from this software without specific prior
  16  *    written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
  19  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  20  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  22  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
  24  * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  26  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  27  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  28  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  *
  30  * This file is part of the Contiki desktop environment
  31  *
  32  * $Id: dhcp-client.c,v 1.4 2010/07/21 22:35:59 oliverschmidt Exp $
  33  *
  34  */
  35
  36 #include "contiki-net.h"
  37 #include "ctk/ctk.h"
  38 #include "cfs/cfs.h"
  39 #include "net/dhcpc.h"
  40
  41 static struct ctk_window window;
  42
  43 static struct ctk_button requestbutton =
  44   {CTK_BUTTON(4, 1, 18, "Request IP address")};
  45 static struct ctk_label statuslabel =
  46   {CTK_LABEL(0, 3, 14, 1, "")};
  47 static struct ctk_label ipaddrlabel =
  48   {CTK_LABEL(0, 5, 10, 1, "IP address")};
  49 static char ipaddr[16];
  50 static struct ctk_textentry ipaddrtextentry =
  51   {CTK_TEXTENTRY(11, 5, 15, 1, ipaddr, 15)};
  52 static struct ctk_label netmasklabel =
  53   {CTK_LABEL(0, 7, 10, 1, "Netmask")};
  54 static char netmask[16];
  55 static struct ctk_textentry netmasktextentry =
  56   {CTK_TEXTENTRY(11, 7, 15, 1, netmask, 15)};
  57 static struct ctk_label gatewaylabel =
  58   {CTK_LABEL(0, 9, 10, 1, "Gateway")};
  59 static char gateway[16];
  60 static struct ctk_textentry gatewaytextentry =
  61   {CTK_TEXTENTRY(11, 9, 15, 1, gateway, 15)};
  62 #if WITH_DNS
  63 static struct ctk_label dnsserverlabel =
  64   {CTK_LABEL(0, 11, 10, 1, "DNS server")};
  65 static char dnsserver[16];
  66 static struct ctk_textentry dnsservertextentry =
  67   {CTK_TEXTENTRY(11, 11, 15, 1, dnsserver, 15)};
  68 #endif /* WITH_DNS */
  69 static struct ctk_button savebutton =
  70   {CTK_BUTTON(0, 13, 12, "Save & close")};
  71 static struct ctk_button cancelbutton =
  72   {CTK_BUTTON(20, 13, 6, "Cancel")};
  73
  74 PROCESS(dhcp_process, "DHCP client");
  75
  76 AUTOSTART_PROCESSES(&dhcp_process);
  77
  78 /*-----------------------------------------------------------------------------------*/
  79 static char *
  80 makebyte(u8_t byte, char *str)
  81 {
  82   if(byte >= 100) {
  83     *str++ = (byte / 100 ) % 10 + '0';
  84   }
  85   if(byte >= 10) {
  86     *str++ = (byte / 10) % 10 + '0';
  87   }
  88   *str++ = (byte % 10) + '0';
  89
  90   return str;
  91 }
  92 /*-----------------------------------------------------------------------------------*/
  93 static void
  94 makeaddr(uip_ipaddr_t *addr, char *str)
  95 {
  96   str = makebyte(addr->u8[0], str);
  97   *str++ = '.';
  98   str = makebyte(addr->u8[1], str);
  99   *str++ = '.';
 100   str = makebyte(addr->u8[2], str);
 101   *str++ = '.';
 102   str = makebyte(addr->u8[3], str);
 103   *str++ = 0;
 104 }
 105 /*-----------------------------------------------------------------------------------*/
 106 static void
 107 makestrings(void)
 108 {
 109   uip_ipaddr_t addr, *addrptr;
 110
 111   uip_gethostaddr(&addr);
 112   makeaddr(&addr, ipaddr);
 113
 114   uip_getnetmask(&addr);
 115   makeaddr(&addr, netmask);
 116
 117   uip_getdraddr(&addr);
 118   makeaddr(&addr, gateway);
 119
 120 #if WITH_DNS
 121   addrptr = resolv_getserver();
 122   if(addrptr != NULL) {
 123     makeaddr(addrptr, dnsserver);
 124   }
 125 #endif /* WITH_DNS */
 126 }
 127 /*-----------------------------------------------------------------------------------*/
 128 static void
 129 nullterminate(char *cptr)
 130 {
 131   /* Find the first space character in the ipaddr and put a zero there
 132      to end the string. */
 133   for(; *cptr != ' ' && *cptr != 0; ++cptr);
 134   *cptr = 0;
 135 }
 136 /*-----------------------------------------------------------------------------------*/
 137 static void
 138 apply_tcpipconfig(void)
 139 {
 140   int file = cfs_open("contiki.cfg", CFS_READ);
 141   int size = cfs_read(file, uip_buf, 100);
 142   cfs_close(file);
 143
 144   nullterminate(ipaddr);
 145   uiplib_ipaddrconv(ipaddr, (uip_ipaddr_t *)&uip_buf[0]);
 146
 147   nullterminate(netmask);
 148   uiplib_ipaddrconv(netmask, (uip_ipaddr_t *)&uip_buf[4]);
 149
 150   nullterminate(gateway);
 151   uiplib_ipaddrconv(gateway, (uip_ipaddr_t *)&uip_buf[8]);
 152
 153 #if WITH_DNS
 154   nullterminate(dnsserver);
 155   uiplib_ipaddrconv(dnsserver, (uip_ipaddr_t *)&uip_buf[12]);
 156 #endif /* WITH_DNS */
 157
 158   file = cfs_open("contiki.cfg", CFS_WRITE);
 159   cfs_write(file, uip_buf, size);
 160   cfs_close(file);
 161 }
 162 /*-----------------------------------------------------------------------------------*/
 163 static void
 164 set_statustext(char *text)
 165 {
 166   ctk_label_set_text(&statuslabel, text);
 167   CTK_WIDGET_REDRAW(&statuslabel);
 168 }
 169 /*-----------------------------------------------------------------------------------*/
 170 static void
 171 app_quit(void)
 172 {
 173   ctk_window_close(&window);
 174   process_exit(&dhcp_process);
 175   LOADER_UNLOAD();
 176 }
 177 /*-----------------------------------------------------------------------------------*/
 178 PROCESS_THREAD(dhcp_process, ev, data)
 179 {
 180   PROCESS_BEGIN();
 181
 182   ctk_window_new(&window, 29, 14, "DHCP client");
 183
 184   CTK_WIDGET_ADD(&window, &requestbutton);
 185   CTK_WIDGET_ADD(&window, &statuslabel);
 186   CTK_WIDGET_ADD(&window, &ipaddrlabel);
 187   CTK_WIDGET_ADD(&window, &ipaddrtextentry);
 188   CTK_WIDGET_ADD(&window, &netmasklabel);
 189   CTK_WIDGET_ADD(&window, &netmasktextentry);
 190   CTK_WIDGET_ADD(&window, &gatewaylabel);
 191   CTK_WIDGET_ADD(&window, &gatewaytextentry);
 192 #if WITH_DNS
 193   CTK_WIDGET_ADD(&window, &dnsserverlabel);
 194   CTK_WIDGET_ADD(&window, &dnsservertextentry);
 195 #endif /* WITH_DNS */
 196   CTK_WIDGET_ADD(&window, &savebutton);
 197   CTK_WIDGET_ADD(&window, &cancelbutton);
 198
 199   CTK_WIDGET_FOCUS(&window, &requestbutton);
 200
 201   ctk_window_open(&window);
 202
 203   /* Allow resolver to set DNS server address. */
 204   process_post(PROCESS_CURRENT(), 0, NULL);
 205
 206   dhcpc_init(uip_ethaddr.addr, sizeof(uip_ethaddr.addr));
 207
 208   while(1) {
 209     PROCESS_WAIT_EVENT();
 210
 211     if(ev == 0) {
 212       makestrings();
 213       ctk_window_redraw(&window);
 214     } else if(ev == tcpip_event) {
 215       dhcpc_appcall(ev, data);
 216     } else if(ev == ctk_signal_button_activate) {
 217       if(data == (process_data_t)&requestbutton) {
 218         dhcpc_request();
 219         set_statustext("Requesting...");
 220       }
 221       if(data == (process_data_t)&savebutton) {
 222         apply_tcpipconfig();
 223         app_quit();
 224       }
 225       if(data == (process_data_t)&cancelbutton) {
 226         app_quit();
 227       }
 228     } else if(
 229 #if CTK_CONF_WINDOWCLOSE
 230               ev == ctk_signal_window_close ||
 231 #endif
 232               ev == PROCESS_EVENT_EXIT) {
 233       app_quit();
 234     }
 235   }
 236
 237   PROCESS_END();
 238 }
 239 /*-----------------------------------------------------------------------------------*/
 240 void
 241 dhcpc_configured(const struct dhcpc_state *s)
 242 {
 243   uip_sethostaddr(&s->ipaddr);
 244   uip_setnetmask(&s->netmask);
 245   uip_setdraddr(&s->default_router);
 246 #if WITH_DNS
 247   resolv_conf(&s->dnsaddr);
 248 #endif /* WITH_DNS */
 249
 250   set_statustext("Configured.");
 251   process_post(PROCESS_CURRENT(), 0, NULL);
 252 }
 253 /*-----------------------------------------------------------------------------------*/
 254 void
 255 dhcpc_unconfigured(const struct dhcpc_state *s)
 256 {
 257   static uip_ipaddr_t nulladdr;
 258
 259   uip_sethostaddr(&nulladdr);
 260   uip_setnetmask(&nulladdr);
 261   uip_setdraddr(&nulladdr);
 262 #if WITH_DNS
 263   resolv_conf(&nulladdr);
 264 #endif /* WITH_DNS */
 265
 266   set_statustext("Unconfigured.");
 267   process_post(PROCESS_CURRENT(), 0, NULL);
 268 }
 269 /*-----------------------------------------------------------------------------------*/