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 * @(#)parseconf.c 8.1 (Berkeley) 6/4/93 42 * $Id$ 43 * 44 * 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 #endif /* not lint */ 51 52 #include <sys/param.h> 53 #include <sys/stat.h> 54 55 #include <ctype.h> 56 #include <dirent.h> 57 #include <fcntl.h> 58 #include <signal.h> 59 #include <stdio.h> 60 #include <stdlib.h> 61 #include <string.h> 62 #include <syslog.h> 63 #include "defs.h" 64 65 /* 66 ** ParseConfig -- parse the config file into linked list of clients. 67 ** 68 ** Parameters: 69 ** None. 70 ** 71 ** Returns: 72 ** 1 on success, 0 otherwise. 73 ** 74 ** Side Effects: 75 ** - Linked list of clients will be (re)allocated. 76 ** 77 ** Warnings: 78 ** - GetBootFiles() must be called before this routine 79 ** to create a linked list of default boot files. 80 */ 81 int 82 ParseConfig() 83 { 84 FILE *fp; 85 CLIENT *client; 86 u_char *addr; 87 char line[C_LINELEN]; 88 register char *cp, *bcp; 89 register int i, j; 90 int omask, linecnt = 0; 91 92 if (BootAny) /* ignore config file */ 93 return(1); 94 95 FreeClients(); /* delete old list of clients */ 96 97 if ((fp = fopen(ConfigFile, "r")) == NULL) { 98 syslog(LOG_ERR, "ParseConfig: can't open config file (%s)", 99 ConfigFile); 100 return(0); 101 } 102 103 /* 104 * We've got to block SIGHUP to prevent reconfiguration while 105 * dealing with the linked list of Clients. This can be done 106 * when actually linking the new client into the list, but 107 * this could have unexpected results if the server was HUP'd 108 * whilst reconfiguring. Hence, it is done here. 109 */ 110 omask = sigblock(sigmask(SIGHUP)); 111 112 /* 113 * GETSTR positions `bcp' at the start of the current token, 114 * and null terminates it. `cp' is positioned at the start 115 * of the next token. spaces & commas are separators. 116 */ 117 #define GETSTR while (isspace(*cp) || *cp == ',') cp++; \ 118 bcp = cp; \ 119 while (*cp && *cp!=',' && !isspace(*cp)) cp++; \ 120 if (*cp) *cp++ = '\0' 121 122 /* 123 * For each line, parse it into a new CLIENT struct. 124 */ 125 while (fgets(line, C_LINELEN, fp) != NULL) { 126 linecnt++; /* line counter */ 127 128 if (*line == '\0' || *line == '#') /* ignore comment */ 129 continue; 130 131 if ((cp = index(line,'#')) != NULL) /* trash comments */ 132 *cp = '\0'; 133 134 cp = line; /* init `cp' */ 135 GETSTR; /* get RMP addr */ 136 if (bcp == cp) /* all delimiters */ 137 continue; 138 139 /* 140 * Get an RMP address from a string. Abort on failure. 141 */ 142 if ((addr = ParseAddr(bcp)) == NULL) { 143 syslog(LOG_ERR, 144 "ParseConfig: line %d: cant parse <%s>", 145 linecnt, bcp); 146 continue; 147 } 148 149 if ((client = NewClient(addr)) == NULL) /* alloc new client */ 150 continue; 151 152 GETSTR; /* get first file */ 153 154 /* 155 * If no boot files are spec'd, use the default list. 156 * Otherwise, validate each file (`bcp') against the 157 * list of boot-able files. 158 */ 159 i = 0; 160 if (bcp == cp) /* no files spec'd */ 161 for (; i < C_MAXFILE && BootFiles[i] != NULL; i++) 162 client->files[i] = BootFiles[i]; 163 else { 164 do { 165 /* 166 * For each boot file spec'd, make sure it's 167 * in our list. If so, include a pointer to 168 * it in the CLIENT's list of boot files. 169 */ 170 for (j = 0; ; j++) { 171 if (j==C_MAXFILE||BootFiles[j]==NULL) { 172 syslog(LOG_ERR, "ParseConfig: line %d: no boot file (%s)", 173 linecnt, bcp); 174 break; 175 } 176 if (STREQN(BootFiles[j], bcp)) { 177 if (i < C_MAXFILE) 178 client->files[i++] = 179 BootFiles[j]; 180 else 181 syslog(LOG_ERR, "ParseConfig: line %d: too many boot files (%s)", 182 linecnt, bcp); 183 break; 184 } 185 } 186 GETSTR; /* get next file */ 187 } while (bcp != cp); 188 189 /* 190 * Restricted list of boot files were spec'd, 191 * however, none of them were found. Since we 192 * apparently cant let them boot "just anything", 193 * the entire record is invalidated. 194 */ 195 if (i == 0) { 196 FreeClient(client); 197 continue; 198 } 199 } 200 201 /* 202 * Link this client into the linked list of clients. 203 * SIGHUP has already been blocked. 204 */ 205 if (Clients) 206 client->next = Clients; 207 Clients = client; 208 } 209 210 (void) fclose(fp); /* close config file */ 211 212 (void) sigsetmask(omask); /* reset signal mask */ 213 214 return(1); /* return success */ 215 } 216 217 /* 218 ** ParseAddr -- Parse a string containing an RMP address. 219 ** 220 ** This routine is fairly liberal at parsing an RMP address. The 221 ** address must contain 6 octets consisting of between 0 and 2 hex 222 ** chars (upper/lower case) separated by colons. If two colons are 223 ** together (e.g. "::", the octet between them is recorded as being 224 ** zero. Hence, the following addrs are all valid and parse to the 225 ** same thing: 226 ** 227 ** 08:00:09:00:66:ad 8::9:0:66:AD 8::9::66:aD 228 ** 229 ** For clarity, an RMP address is really an Ethernet address, but 230 ** since the HP boot code uses IEEE 802.3, it's really an IEEE 231 ** 802.3 address. Of course, all of these are identical. 232 ** 233 ** Parameters: 234 ** str - string representation of an RMP address. 235 ** 236 ** Returns: 237 ** pointer to a static array of RMP_ADDRLEN bytes. 238 ** 239 ** Side Effects: 240 ** None. 241 ** 242 ** Warnings: 243 ** - The return value points to a static buffer; it must 244 ** be copied if it's to be saved. 245 ** - For speed, we assume a u_char consists of 8 bits. 246 */ 247 u_char * 248 ParseAddr(str) 249 char *str; 250 { 251 static u_char addr[RMP_ADDRLEN]; 252 register char *cp; 253 register unsigned i; 254 register int part, subpart; 255 256 bzero((char *)&addr[0], RMP_ADDRLEN); /* zero static buffer */ 257 258 part = subpart = 0; 259 for (cp = str; *cp; cp++) { 260 /* 261 * A colon (`:') must be used to delimit each octet. 262 */ 263 if (*cp == ':') { 264 if (++part == RMP_ADDRLEN) /* too many parts */ 265 return(NULL); 266 subpart = 0; 267 continue; 268 } 269 270 /* 271 * Convert hex character to an integer. 272 */ 273 if (isdigit(*cp)) 274 i = *cp - '0'; 275 else { 276 i = (isupper(*cp)? tolower(*cp): *cp) - 'a' + 10; 277 if (i < 10 || i > 15) /* not a hex char */ 278 return(NULL); 279 } 280 281 if (subpart++) { 282 if (subpart > 2) /* too many hex chars */ 283 return(NULL); 284 addr[part] <<= 4; 285 } 286 addr[part] |= i; 287 } 288 289 if (part != (RMP_ADDRLEN-1)) /* too few parts */ 290 return(NULL); 291 292 return(&addr[0]); 293 } 294 295 /* 296 ** GetBootFiles -- record list of files in current (boot) directory. 297 ** 298 ** Parameters: 299 ** None. 300 ** 301 ** Returns: 302 ** Number of boot files on success, 0 on failure. 303 ** 304 ** Side Effects: 305 ** Strings in `BootFiles' are freed/allocated. 306 ** 307 ** Warnings: 308 ** - After this routine is called, ParseConfig() must be 309 ** called to re-order it's list of boot file pointers. 310 */ 311 int 312 GetBootFiles() 313 { 314 DIR *dfd; 315 struct stat statb; 316 register struct dirent *dp; 317 register int i; 318 319 /* 320 * Free the current list of boot files. 321 */ 322 for (i = 0; i < C_MAXFILE && BootFiles[i] != NULL; i++) { 323 FreeStr(BootFiles[i]); 324 BootFiles[i] = NULL; 325 } 326 327 /* 328 * Open current directory to read boot file names. 329 */ 330 if ((dfd = opendir(".")) == NULL) { /* open BootDir */ 331 syslog(LOG_ERR, "GetBootFiles: can't open directory (%s)\n", 332 BootDir); 333 return(0); 334 } 335 336 /* 337 * Read each boot file name and allocate space for it in the 338 * list of boot files (BootFiles). All boot files read after 339 * C_MAXFILE will be ignored. 340 */ 341 i = 0; 342 for (dp = readdir(dfd); dp != NULL; dp = readdir(dfd)) { 343 if (stat(dp->d_name, &statb) < 0 || 344 (statb.st_mode & S_IFMT) != S_IFREG) 345 continue; 346 if (i == C_MAXFILE) 347 syslog(LOG_ERR, 348 "GetBootFiles: too many boot files (%s ignored)", 349 dp->d_name); 350 else if ((BootFiles[i] = NewStr(dp->d_name)) != NULL) 351 i++; 352 } 353 354 (void) closedir(dfd); /* close BootDir */ 355 356 if (i == 0) /* cant find any boot files */ 357 syslog(LOG_ERR, "GetBootFiles: no boot files (%s)\n", BootDir); 358 359 return(i); 360 } 361