tcpip.c revision 46549
1/* 2 * $Id: tcpip.c,v 1.75 1999/02/05 22:15:52 jkh Exp $ 3 * 4 * Copyright (c) 1995 5 * Gary J Palmer. All rights reserved. 6 * Copyright (c) 1996 7 * Jordan K. Hubbard. All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer, 14 * verbatim and that no modifications are made prior to this 15 * point in the file. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 25 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 26 * OF USE, DATA, LIFE OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 27 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR 28 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 * 31 */ 32 33/* 34 * All kinds of hacking also performed by jkh on this code. Don't 35 * blame Gary for every bogosity you see here.. :-) 36 * 37 * -jkh 38 */ 39 40#include "sysinstall.h" 41#include <sys/param.h> 42 43/* The help file for the TCP/IP setup screen */ 44#define TCP_HELPFILE "tcp" 45 46/* These are nasty, but they make the layout structure a lot easier ... */ 47 48static char hostname[HOSTNAME_FIELD_LEN], domainname[HOSTNAME_FIELD_LEN], 49 gateway[IPADDR_FIELD_LEN], nameserver[IPADDR_FIELD_LEN]; 50static int okbutton, cancelbutton; 51static char ipaddr[IPADDR_FIELD_LEN], netmask[IPADDR_FIELD_LEN], extras[EXTRAS_FIELD_LEN]; 52 53/* What the screen size is meant to be */ 54#define TCP_DIALOG_Y 0 55#define TCP_DIALOG_X 8 56#define TCP_DIALOG_WIDTH COLS - 16 57#define TCP_DIALOG_HEIGHT LINES - 2 58 59static Layout layout[] = { 60#define LAYOUT_HOSTNAME 0 61 { 1, 2, 25, HOSTNAME_FIELD_LEN - 1, 62 "Host:", "Your fully-qualified hostname, e.g. foo.bar.com", 63 hostname, STRINGOBJ, NULL }, 64#define LAYOUT_DOMAINNAME 1 65 { 1, 35, 20, HOSTNAME_FIELD_LEN - 1, 66 "Domain:", 67 "The name of the domain that your machine is in, e.g. bar.com", 68 domainname, STRINGOBJ, NULL }, 69#define LAYOUT_GATEWAY 2 70 { 5, 2, 18, IPADDR_FIELD_LEN - 1, 71 "Gateway:", 72 "IP address of host forwarding packets to non-local destinations", 73 gateway, STRINGOBJ, NULL }, 74#define LAYOUT_NAMESERVER 3 75 { 5, 35, 18, IPADDR_FIELD_LEN - 1, 76 "Name server:", "IP address of your local DNS server", 77 nameserver, STRINGOBJ, NULL }, 78#define LAYOUT_IPADDR 4 79 { 10, 10, 18, IPADDR_FIELD_LEN - 1, 80 "IP Address:", 81 "The IP address to be used for this interface", 82 ipaddr, STRINGOBJ, NULL }, 83#define LAYOUT_NETMASK 5 84 { 10, 35, 18, IPADDR_FIELD_LEN - 1, 85 "Netmask:", 86 "The netmask for this interface, e.g. 0xffffff00 for a class C network", 87 netmask, STRINGOBJ, NULL }, 88#define LAYOUT_EXTRAS 6 89 { 14, 10, 37, HOSTNAME_FIELD_LEN - 1, 90 "Extra options to ifconfig:", 91 "Any interface-specific options to ifconfig you would like to add", 92 extras, STRINGOBJ, NULL }, 93#define LAYOUT_OKBUTTON 7 94 { 19, 15, 0, 0, 95 "OK", "Select this if you are happy with these settings", 96 &okbutton, BUTTONOBJ, NULL }, 97#define LAYOUT_CANCELBUTTON 8 98 { 19, 35, 0, 0, 99 "CANCEL", "Select this if you wish to cancel this screen", 100 &cancelbutton, BUTTONOBJ, NULL }, 101 { NULL }, 102}; 103 104#define _validByte(b) ((b) >= 0 && (b) <= 255) 105 106/* whine */ 107static void 108feepout(char *msg) 109{ 110 beep(); 111 msgConfirm(msg); 112} 113 114/* Very basic IP address integrity check - could be drastically improved */ 115static int 116verifyIP(char *ip) 117{ 118 int a, b, c, d; 119 120 if (ip && sscanf(ip, "%d.%d.%d.%d", &a, &b, &c, &d) == 4 && 121 _validByte(a) && _validByte(b) && _validByte(c) && 122 _validByte(d) && (d != 255)) 123 return 1; 124 else 125 return 0; 126} 127 128/* Check for the settings on the screen - the per-interface stuff is 129 moved to the main handling code now to do it on the fly - sigh */ 130static int 131verifySettings(void) 132{ 133 if (!hostname[0]) 134 feepout("Must specify a host name of some sort!"); 135 else if (gateway[0] && strcmp(gateway, "NO") && !verifyIP(gateway)) 136 feepout("Invalid gateway IP address specified"); 137 else if (nameserver[0] && !verifyIP(nameserver)) 138 feepout("Invalid name server IP address specified"); 139 else if (netmask[0] && (netmask[0] < '0' && netmask[0] > '3')) 140 feepout("Invalid netmask value"); 141 else if (ipaddr[0] && !verifyIP(ipaddr)) 142 feepout("Invalid IP address"); 143 else 144 return 1; 145 return 0; 146} 147 148/* This is it - how to get TCP setup values */ 149int 150tcpOpenDialog(Device *devp) 151{ 152 WINDOW *ds_win, *save = NULL; 153 ComposeObj *obj = NULL; 154 int n = 0, cancel = FALSE; 155 int max, ret = DITEM_SUCCESS; 156 char *tmp; 157 char title[80]; 158 159 /* Initialise vars from previous device values */ 160 if (devp->private) { 161 DevInfo *di = (DevInfo *)devp->private; 162 163 SAFE_STRCPY(ipaddr, di->ipaddr); 164 SAFE_STRCPY(netmask, di->netmask); 165 SAFE_STRCPY(extras, di->extras); 166 } 167 else { /* See if there are any defaults */ 168 char *cp; 169 170 /* First try a DHCP scan */ 171 msgNotify("Scanning for DHCP servers..."); 172 Mkdir("/var/db"); 173 vsystem("ifconfig %s inet 0.0.0.0 netmask 0.0.0.0 broadcast 255.255.255.255 up", devp->name); 174 if (!vsystem("dhclient")) { 175 msgConfirm("Successful return from dhclient"); 176 } 177 else 178 msgConfirm("Unsuccessful return from dhclient"); 179 180 /* Get old IP address from variable space, if available */ 181 if (!ipaddr[0]) { 182 if ((cp = variable_get(VAR_IPADDR)) != NULL) 183 SAFE_STRCPY(ipaddr, cp); 184 else if ((cp = variable_get(string_concat3(devp->name, "_", VAR_IPADDR))) != NULL) 185 SAFE_STRCPY(ipaddr, cp); 186 } 187 188 /* Get old netmask from variable space, if available */ 189 if (!netmask[0]) { 190 if ((cp = variable_get(VAR_NETMASK)) != NULL) 191 SAFE_STRCPY(netmask, cp); 192 else if ((cp = variable_get(string_concat3(devp->name, "_", VAR_NETMASK))) != NULL) 193 SAFE_STRCPY(netmask, cp); 194 } 195 196 /* Get old extras string from variable space, if available */ 197 if (!extras[0]) { 198 if ((cp = variable_get(VAR_EXTRAS)) != NULL) 199 SAFE_STRCPY(extras, cp); 200 else if ((cp = variable_get(string_concat3(devp->name, "_", VAR_EXTRAS))) != NULL) 201 SAFE_STRCPY(extras, cp); 202 } 203 } 204 205 /* Look up values already recorded with the system, or blank the string variables ready to accept some new data */ 206 tmp = variable_get(VAR_HOSTNAME); 207 if (tmp) 208 SAFE_STRCPY(hostname, tmp); 209 else 210 bzero(hostname, sizeof(hostname)); 211 tmp = variable_get(VAR_DOMAINNAME); 212 if (tmp) 213 SAFE_STRCPY(domainname, tmp); 214 else 215 bzero(domainname, sizeof(domainname)); 216 tmp = variable_get(VAR_GATEWAY); 217 if (tmp) 218 SAFE_STRCPY(gateway, tmp); 219 else 220 bzero(gateway, sizeof(gateway)); 221 tmp = variable_get(VAR_NAMESERVER); 222 if (tmp) 223 SAFE_STRCPY(nameserver, tmp); 224 else 225 bzero(nameserver, sizeof(nameserver)); 226 227 save = savescr(); 228 /* If non-interactive, jump straight over the dialog crap and into config section */ 229 if (variable_get(VAR_NONINTERACTIVE) && 230 !variable_get(VAR_NETINTERACTIVE)) { 231 if (!hostname[0]) 232 msgConfirm("WARNING: hostname variable not set and is a non-optional\n" 233 "parameter. Please add this to your installation script\n" 234 "or set the netInteractive variable (see sysinstall man page)"); 235 else 236 goto netconfig; 237 } 238 239 /* Now do all the screen I/O */ 240 dialog_clear_norefresh(); 241 242 /* We need a curses window */ 243 if (!(ds_win = openLayoutDialog(TCP_HELPFILE, " Network Configuration ", 244 TCP_DIALOG_X, TCP_DIALOG_Y, TCP_DIALOG_WIDTH, TCP_DIALOG_HEIGHT))) { 245 beep(); 246 msgConfirm("Cannot open TCP/IP dialog window!!"); 247 restorescr(save); 248 return DITEM_FAILURE; 249 } 250 251 /* Draw interface configuration box */ 252 draw_box(ds_win, TCP_DIALOG_Y + 9, TCP_DIALOG_X + 8, TCP_DIALOG_HEIGHT - 13, TCP_DIALOG_WIDTH - 17, 253 dialog_attr, border_attr); 254 wattrset(ds_win, dialog_attr); 255 sprintf(title, " Configuration for Interface %s ", devp->name); 256 mvwaddstr(ds_win, TCP_DIALOG_Y + 9, TCP_DIALOG_X + 14, title); 257 258 /* Some more initialisation before we go into the main input loop */ 259 obj = initLayoutDialog(ds_win, layout, TCP_DIALOG_X, TCP_DIALOG_Y, &max); 260 261reenter: 262 cancelbutton = okbutton = 0; 263 while (layoutDialogLoop(ds_win, layout, &obj, &n, max, &cancelbutton, &cancel)) { 264 /* Insert a default value for the netmask, 0xffffff00 is 265 the most appropriate one (entire class C, or subnetted 266 class A/B network). */ 267 if (netmask[0] == '\0') { 268 strcpy(netmask, "255.255.255.0"); 269 RefreshStringObj(layout[LAYOUT_NETMASK].obj); 270 } 271 if (!index(hostname, '.') && domainname[0]) { 272 strcat(hostname, "."); 273 strcat(hostname, domainname); 274 RefreshStringObj(layout[LAYOUT_HOSTNAME].obj); 275 } 276 else if (((tmp = index(hostname, '.')) != NULL) && !domainname[0]) { 277 SAFE_STRCPY(domainname, tmp + 1); 278 RefreshStringObj(layout[LAYOUT_DOMAINNAME].obj); 279 } 280 } 281 282 if (!cancel && !verifySettings()) 283 goto reenter; 284 285 /* Clear this crap off the screen */ 286 delwin(ds_win); 287 dialog_clear_norefresh(); 288 use_helpfile(NULL); 289 290 /* We actually need to inform the rest of sysinstall about this 291 data now if the user hasn't selected cancel. Save the stuff 292 out to the environment via the variable_set() mechanism */ 293 294netconfig: 295 if (!cancel) { 296 DevInfo *di; 297 char temp[512], ifn[255]; 298 char *ifaces; 299 300 variable_set2(VAR_HOSTNAME, hostname, 1); 301 sethostname(hostname, strlen(hostname)); 302 if (domainname[0]) 303 variable_set2(VAR_DOMAINNAME, domainname, 0); 304 if (gateway[0]) 305 variable_set2(VAR_GATEWAY, gateway, 1); 306 if (nameserver[0]) 307 variable_set2(VAR_NAMESERVER, nameserver, 0); 308 309 if (!devp->private) 310 devp->private = (DevInfo *)safe_malloc(sizeof(DevInfo)); 311 di = devp->private; 312 SAFE_STRCPY(di->ipaddr, ipaddr); 313 SAFE_STRCPY(di->netmask, netmask); 314 SAFE_STRCPY(di->extras, extras); 315 316 sprintf(temp, "inet %s %s netmask %s", ipaddr, extras, netmask); 317 sprintf(ifn, "%s%s", VAR_IFCONFIG, devp->name); 318 variable_set2(ifn, temp, 1); 319 ifaces = variable_get(VAR_INTERFACES); 320 if (!ifaces) 321 variable_set2(VAR_INTERFACES, ifaces = "lo0", 1); 322 /* Only add it if it's not there already */ 323 if (!strstr(ifaces, devp->name)) { 324 sprintf(ifn, "%s %s", devp->name, ifaces); 325 variable_set2(VAR_INTERFACES, ifn, 1); 326 } 327 if (ipaddr[0]) 328 variable_set2(VAR_IPADDR, ipaddr, 0); 329 configResolv(NULL); /* XXX this will do it on the MFS copy XXX */ 330 ret = DITEM_SUCCESS; 331 } 332 else 333 ret = DITEM_FAILURE; 334 restorescr(save); 335 return ret; 336} 337 338static Device *NetDev; 339 340static int 341netHook(dialogMenuItem *self) 342{ 343 Device **devs; 344 345 devs = deviceFindDescr(self->prompt, self->title, DEVICE_TYPE_NETWORK); 346 if (devs) { 347 if (DITEM_STATUS(tcpOpenDialog(devs[0])) != DITEM_FAILURE) 348 NetDev = devs[0]; 349 else 350 NetDev = NULL; 351 } 352 return devs ? DITEM_LEAVE_MENU : DITEM_FAILURE; 353} 354 355/* Get a network device */ 356Device * 357tcpDeviceSelect(void) 358{ 359 DMenu *menu; 360 Device **devs, *rval; 361 int cnt; 362 363 devs = deviceFind(NULL, DEVICE_TYPE_NETWORK); 364 cnt = deviceCount(devs); 365 rval = NULL; 366 367 if (!cnt) { 368 msgConfirm("No network devices available!"); 369 return NULL; 370 } 371 else if (!RunningAsInit) { 372 if (!msgYesNo("Running multi-user, assume that the network is already configured?")) 373 return devs[0]; 374 } 375 if (cnt == 1) { 376 if (DITEM_STATUS(tcpOpenDialog(devs[0]) == DITEM_SUCCESS)) 377 rval = devs[0]; 378 } 379 else if (variable_get(VAR_NONINTERACTIVE) && variable_get(VAR_NETWORK_DEVICE)) { 380 devs = deviceFind(variable_get(VAR_NETWORK_DEVICE), DEVICE_TYPE_NETWORK); 381 cnt = deviceCount(devs); 382 if (cnt) { 383 if (DITEM_STATUS(tcpOpenDialog(devs[0]) == DITEM_SUCCESS)) 384 rval = devs[0]; 385 } 386 } 387 else { 388 int status; 389 390 menu = deviceCreateMenu(&MenuNetworkDevice, DEVICE_TYPE_NETWORK, netHook, NULL); 391 if (!menu) 392 msgFatal("Unable to create network device menu! Argh!"); 393 status = dmenuOpenSimple(menu, FALSE); 394 free(menu); 395 if (status) 396 rval = NetDev; 397 } 398 return rval; 399} 400 401/* Do it from a menu that doesn't care about status */ 402int 403tcpMenuSelect(dialogMenuItem *self) 404{ 405 Device *tmp; 406 407 tmp = tcpDeviceSelect(); 408 if (tmp && !msgYesNo("Would you like to bring the %s interface up right now?", tmp->name)) 409 if (!tmp->init(tmp)) 410 msgConfirm("Initialization of %s device failed.", tmp->name); 411 return DITEM_SUCCESS | DITEM_RESTORE; 412} 413