1 /* 2 * Copyright (c) 1988, 1992 The University of Utah and the Center 3 * for Software Science (CSS). 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * the Center for Software Science of the University of Utah Computer 9 * Science Department. CSS requests users of this software to return 10 * to css-dist@cs.utah.edu any improvements that they make and grant 11 * CSS redistribution rights. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. All advertising materials mentioning features or use of this software 22 * must display the following acknowledgement: 23 * This product includes software developed by the University of 24 * California, Berkeley and its contributors. 25 * 4. Neither the name of the University nor the names of its contributors 26 * may be used to endorse or promote products derived from this software 27 * without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 30 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 31 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 32 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 33 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 34 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 35 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 37 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 38 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 39 * SUCH DAMAGE. 40 * 41 * from: @(#)parseconf.c 8.1 (Berkeley) 6/4/93 42 * $Id: parseconf.c,v 1.2 1994/01/11 16:41:33 brezak Exp $ 43 * 44 * From: Utah Hdr: parseconf.c 3.1 92/07/06 45 * Author: Jeff Forys, University of Utah CSS 46 */ 47 48 #ifndef lint 49 /*static char sccsid[] = "@(#)parseconf.c 8.1 (Berkeley) 6/4/93";*/ 50 static char rcsid[] = "$Id: parseconf.c,v 1.2 1994/01/11 16:41:33 brezak Exp $"; 51 #endif /* not lint */ 52 53 #include <sys/param.h> 54 #include <sys/stat.h> 55 56 #include <ctype.h> 57 #include <dirent.h> 58 #include <fcntl.h> 59 #include <signal.h> 60 #include <stdio.h> 61 #include <stdlib.h> 62 #include <string.h> 63 #include <syslog.h> 64 #include "defs.h" 65 66 /* 67 ** ParseConfig -- parse the config file into linked list of clients. 68 ** 69 ** Parameters: 70 ** None. 71 ** 72 ** Returns: 73 ** 1 on success, 0 otherwise. 74 ** 75 ** Side Effects: 76 ** - Linked list of clients will be (re)allocated. 77 ** 78 ** Warnings: 79 ** - GetBootFiles() must be called before this routine 80 ** to create a linked list of default boot files. 81 */ 82 int 83 ParseConfig() 84 { 85 FILE *fp; 86 CLIENT *client; 87 u_char *addr; 88 char line[C_LINELEN]; 89 register char *cp, *bcp; 90 register int i, j; 91 int omask, linecnt = 0; 92 93 if (BootAny) /* ignore config file */ 94 return(1); 95 96 FreeClients(); /* delete old list of clients */ 97 98 if ((fp = fopen(ConfigFile, "r")) == NULL) { 99 syslog(LOG_ERR, "ParseConfig: can't open config file (%s)", 100 ConfigFile); 101 return(0); 102 } 103 104 /* 105 * We've got to block SIGHUP to prevent reconfiguration while 106 * dealing with the linked list of Clients. This can be done 107 * when actually linking the new client into the list, but 108 * this could have unexpected results if the server was HUP'd 109 * whilst reconfiguring. Hence, it is done here. 110 */ 111 omask = sigblock(sigmask(SIGHUP)); 112 113 /* 114 * GETSTR positions `bcp' at the start of the current token, 115 * and null terminates it. `cp' is positioned at the start 116 * of the next token. spaces & commas are separators. 117 */ 118 #define GETSTR while (isspace(*cp) || *cp == ',') cp++; \ 119 bcp = cp; \ 120 while (*cp && *cp!=',' && !isspace(*cp)) cp++; \ 121 if (*cp) *cp++ = '\0' 122 123 /* 124 * For each line, parse it into a new CLIENT struct. 125 */ 126 while (fgets(line, C_LINELEN, fp) != NULL) { 127 linecnt++; /* line counter */ 128 129 if (*line == '\0' || *line == '#') /* ignore comment */ 130 continue; 131 132 if ((cp = index(line,'#')) != NULL) /* trash comments */ 133 *cp = '\0'; 134 135 cp = line; /* init `cp' */ 136 GETSTR; /* get RMP addr */ 137 if (bcp == cp) /* all delimiters */ 138 continue; 139 140 /* 141 * Get an RMP address from a string. Abort on failure. 142 */ 143 if ((addr = ParseAddr(bcp)) == NULL) { 144 syslog(LOG_ERR, 145 "ParseConfig: line %d: cant parse <%s>", 146 linecnt, bcp); 147 continue; 148 } 149 150 if ((client = NewClient(addr)) == NULL) /* alloc new client */ 151 continue; 152 153 GETSTR; /* get first file */ 154 155 /* 156 * If no boot files are spec'd, use the default list. 157 * Otherwise, validate each file (`bcp') against the 158 * list of boot-able files. 159 */ 160 i = 0; 161 if (bcp == cp) /* no files spec'd */ 162 for (; i < C_MAXFILE && BootFiles[i] != NULL; i++) 163 client->files[i] = BootFiles[i]; 164 else { 165 do { 166 /* 167 * For each boot file spec'd, make sure it's 168 * in our list. If so, include a pointer to 169 * it in the CLIENT's list of boot files. 170 */ 171 for (j = 0; ; j++) { 172 if (j==C_MAXFILE||BootFiles[j]==NULL) { 173 syslog(LOG_ERR, "ParseConfig: line %d: no boot file (%s)", 174 linecnt, bcp); 175 break; 176 } 177 if (STREQN(BootFiles[j], bcp)) { 178 if (i < C_MAXFILE) 179 client->files[i++] = 180 BootFiles[j]; 181 else 182 syslog(LOG_ERR, "ParseConfig: line %d: too many boot files (%s)", 183 linecnt, bcp); 184 break; 185 } 186 } 187 GETSTR; /* get next file */ 188 } while (bcp != cp); 189 190 /* 191 * Restricted list of boot files were spec'd, 192 * however, none of them were found. Since we 193 * apparently cant let them boot "just anything", 194 * the entire record is invalidated. 195 */ 196 if (i == 0) { 197 FreeClient(client); 198 continue; 199 } 200 } 201 202 /* 203 * Link this client into the linked list of clients. 204 * SIGHUP has already been blocked. 205 */ 206 if (Clients) 207 client->next = Clients; 208 Clients = client; 209 } 210 211 (void) fclose(fp); /* close config file */ 212 213 (void) sigsetmask(omask); /* reset signal mask */ 214 215 return(1); /* return success */ 216 } 217 218 /* 219 ** ParseAddr -- Parse a string containing an RMP address. 220 ** 221 ** This routine is fairly liberal at parsing an RMP address. The 222 ** address must contain 6 octets consisting of between 0 and 2 hex 223 ** chars (upper/lower case) separated by colons. If two colons are 224 ** together (e.g. "::", the octet between them is recorded as being 225 ** zero. Hence, the following addrs are all valid and parse to the 226 ** same thing: 227 ** 228 ** 08:00:09:00:66:ad 8::9:0:66:AD 8::9::66:aD 229 ** 230 ** For clarity, an RMP address is really an Ethernet address, but 231 ** since the HP boot code uses IEEE 802.3, it's really an IEEE 232 ** 802.3 address. Of course, all of these are identical. 233 ** 234 ** Parameters: 235 ** str - string representation of an RMP address. 236 ** 237 ** Returns: 238 ** pointer to a static array of RMP_ADDRLEN bytes. 239 ** 240 ** Side Effects: 241 ** None. 242 ** 243 ** Warnings: 244 ** - The return value points to a static buffer; it must 245 ** be copied if it's to be saved. 246 ** - For speed, we assume a u_char consists of 8 bits. 247 */ 248 u_char * 249 ParseAddr(str) 250 char *str; 251 { 252 static u_char addr[RMP_ADDRLEN]; 253 register char *cp; 254 register unsigned i; 255 register int part, subpart; 256 257 bzero((char *)&addr[0], RMP_ADDRLEN); /* zero static buffer */ 258 259 part = subpart = 0; 260 for (cp = str; *cp; cp++) { 261 /* 262 * A colon (`:') must be used to delimit each octet. 263 */ 264 if (*cp == ':') { 265 if (++part == RMP_ADDRLEN) /* too many parts */ 266 return(NULL); 267 subpart = 0; 268 continue; 269 } 270 271 /* 272 * Convert hex character to an integer. 273 */ 274 if (isdigit(*cp)) 275 i = *cp - '0'; 276 else { 277 i = (isupper(*cp)? tolower(*cp): *cp) - 'a' + 10; 278 if (i < 10 || i > 15) /* not a hex char */ 279 return(NULL); 280 } 281 282 if (subpart++) { 283 if (subpart > 2) /* too many hex chars */ 284 return(NULL); 285 addr[part] <<= 4; 286 } 287 addr[part] |= i; 288 } 289 290 if (part != (RMP_ADDRLEN-1)) /* too few parts */ 291 return(NULL); 292 293 return(&addr[0]); 294 } 295 296 /* 297 ** GetBootFiles -- record list of files in current (boot) directory. 298 ** 299 ** Parameters: 300 ** None. 301 ** 302 ** Returns: 303 ** Number of boot files on success, 0 on failure. 304 ** 305 ** Side Effects: 306 ** Strings in `BootFiles' are freed/allocated. 307 ** 308 ** Warnings: 309 ** - After this routine is called, ParseConfig() must be 310 ** called to re-order it's list of boot file pointers. 311 */ 312 int 313 GetBootFiles() 314 { 315 DIR *dfd; 316 struct stat statb; 317 register struct dirent *dp; 318 register int i; 319 320 /* 321 * Free the current list of boot files. 322 */ 323 for (i = 0; i < C_MAXFILE && BootFiles[i] != NULL; i++) { 324 FreeStr(BootFiles[i]); 325 BootFiles[i] = NULL; 326 } 327 328 /* 329 * Open current directory to read boot file names. 330 */ 331 if ((dfd = opendir(".")) == NULL) { /* open BootDir */ 332 syslog(LOG_ERR, "GetBootFiles: can't open directory (%s)\n", 333 BootDir); 334 return(0); 335 } 336 337 /* 338 * Read each boot file name and allocate space for it in the 339 * list of boot files (BootFiles). All boot files read after 340 * C_MAXFILE will be ignored. 341 */ 342 i = 0; 343 for (dp = readdir(dfd); dp != NULL; dp = readdir(dfd)) { 344 if (stat(dp->d_name, &statb) < 0 || 345 (statb.st_mode & S_IFMT) != S_IFREG) 346 continue; 347 if (i == C_MAXFILE) 348 syslog(LOG_ERR, 349 "GetBootFiles: too many boot files (%s ignored)", 350 dp->d_name); 351 else if ((BootFiles[i] = NewStr(dp->d_name)) != NULL) 352 i++; 353 } 354 355 (void) closedir(dfd); /* close BootDir */ 356 357 if (i == 0) /* cant find any boot files */ 358 syslog(LOG_ERR, "GetBootFiles: no boot files (%s)\n", BootDir); 359 360 return(i); 361 } 362