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 * 43 * From: Utah Hdr: parseconf.c 3.1 92/07/06 44 * Author: Jeff Forys, University of Utah CSS 45 */ 46 47 #ifndef lint 48 #if 0 49 static const char sccsid[] = "@(#)parseconf.c 8.1 (Berkeley) 6/4/93"; 50 #endif 51 static const char rcsid[] = 52 "$FreeBSD$"; 53 #endif /* not lint */ 54 55 #include <sys/param.h> 56 #include <sys/stat.h> 57 #include <sys/time.h> 58 59 #include <ctype.h> 60 #include <dirent.h> 61 #include <fcntl.h> 62 #include <signal.h> 63 #include <stdio.h> 64 #include <stdlib.h> 65 #include <string.h> 66 #include <syslog.h> 67 #include "defs.h" 68 69 /* 70 ** ParseConfig -- parse the config file into linked list of clients. 71 ** 72 ** Parameters: 73 ** None. 74 ** 75 ** Returns: 76 ** 1 on success, 0 otherwise. 77 ** 78 ** Side Effects: 79 ** - Linked list of clients will be (re)allocated. 80 ** 81 ** Warnings: 82 ** - GetBootFiles() must be called before this routine 83 ** to create a linked list of default boot files. 84 */ 85 int 86 ParseConfig(void) 87 { 88 FILE *fp; 89 CLIENT *client; 90 u_int8_t *addr; 91 char line[C_LINELEN]; 92 char *cp, *bcp; 93 int i, j; 94 int omask, linecnt = 0; 95 96 if (BootAny) /* ignore config file */ 97 return(1); 98 99 FreeClients(); /* delete old list of clients */ 100 101 if ((fp = fopen(ConfigFile, "r")) == NULL) { 102 syslog(LOG_ERR, "ParseConfig: can't open config file (%s)", 103 ConfigFile); 104 return(0); 105 } 106 107 /* 108 * We've got to block SIGHUP to prevent reconfiguration while 109 * dealing with the linked list of Clients. This can be done 110 * when actually linking the new client into the list, but 111 * this could have unexpected results if the server was HUP'd 112 * whilst reconfiguring. Hence, it is done here. 113 */ 114 omask = sigblock(sigmask(SIGHUP)); 115 116 /* 117 * GETSTR positions `bcp' at the start of the current token, 118 * and null terminates it. `cp' is positioned at the start 119 * of the next token. spaces & commas are separators. 120 */ 121 #define GETSTR while (isspace(*cp) || *cp == ',') cp++; \ 122 bcp = cp; \ 123 while (*cp && *cp!=',' && !isspace(*cp)) cp++; \ 124 if (*cp) *cp++ = '\0' 125 126 /* 127 * For each line, parse it into a new CLIENT struct. 128 */ 129 while (fgets(line, C_LINELEN, fp) != NULL) { 130 linecnt++; /* line counter */ 131 132 if (*line == '\0' || *line == '#') /* ignore comment */ 133 continue; 134 135 if ((cp = strchr(line,'#')) != NULL) /* trash comments */ 136 *cp = '\0'; 137 138 cp = line; /* init `cp' */ 139 GETSTR; /* get RMP addr */ 140 if (bcp == cp) /* all delimiters */ 141 continue; 142 143 /* 144 * Get an RMP address from a string. Abort on failure. 145 */ 146 if ((addr = ParseAddr(bcp)) == NULL) { 147 syslog(LOG_ERR, 148 "ParseConfig: line %d: cant parse <%s>", 149 linecnt, bcp); 150 continue; 151 } 152 153 if ((client = NewClient(addr)) == NULL) /* alloc new client */ 154 continue; 155 156 GETSTR; /* get first file */ 157 158 /* 159 * If no boot files are spec'd, use the default list. 160 * Otherwise, validate each file (`bcp') against the 161 * list of boot-able files. 162 */ 163 i = 0; 164 if (bcp == cp) /* no files spec'd */ 165 for (; i < C_MAXFILE && BootFiles[i] != NULL; i++) 166 client->files[i] = BootFiles[i]; 167 else { 168 do { 169 /* 170 * For each boot file spec'd, make sure it's 171 * in our list. If so, include a pointer to 172 * it in the CLIENT's list of boot files. 173 */ 174 for (j = 0; ; j++) { 175 if (j==C_MAXFILE||BootFiles[j]==NULL) { 176 syslog(LOG_ERR, "ParseConfig: line %d: no boot file (%s)", 177 linecnt, bcp); 178 break; 179 } 180 if (STREQN(BootFiles[j], bcp)) { 181 if (i < C_MAXFILE) 182 client->files[i++] = 183 BootFiles[j]; 184 else 185 syslog(LOG_ERR, "ParseConfig: line %d: too many boot files (%s)", 186 linecnt, bcp); 187 break; 188 } 189 } 190 GETSTR; /* get next file */ 191 } while (bcp != cp); 192 193 /* 194 * Restricted list of boot files were spec'd, 195 * however, none of them were found. Since we 196 * apparently cant let them boot "just anything", 197 * the entire record is invalidated. 198 */ 199 if (i == 0) { 200 FreeClient(client); 201 continue; 202 } 203 } 204 205 /* 206 * Link this client into the linked list of clients. 207 * SIGHUP has already been blocked. 208 */ 209 if (Clients) 210 client->next = Clients; 211 Clients = client; 212 } 213 214 (void) fclose(fp); /* close config file */ 215 216 (void) sigsetmask(omask); /* reset signal mask */ 217 218 return(1); /* return success */ 219 } 220 221 /* 222 ** ParseAddr -- Parse a string containing an RMP address. 223 ** 224 ** This routine is fairly liberal at parsing an RMP address. The 225 ** address must contain 6 octets consisting of between 0 and 2 hex 226 ** chars (upper/lower case) separated by colons. If two colons are 227 ** together (e.g. "::", the octet between them is recorded as being 228 ** zero. Hence, the following addrs are all valid and parse to the 229 ** same thing: 230 ** 231 ** 08:00:09:00:66:ad 8::9:0:66:AD 8::9::66:aD 232 ** 233 ** For clarity, an RMP address is really an Ethernet address, but 234 ** since the HP boot code uses IEEE 802.3, it's really an IEEE 235 ** 802.3 address. Of course, all of these are identical. 236 ** 237 ** Parameters: 238 ** str - string representation of an RMP address. 239 ** 240 ** Returns: 241 ** pointer to a static array of RMP_ADDRLEN bytes. 242 ** 243 ** Side Effects: 244 ** None. 245 ** 246 ** Warnings: 247 ** - The return value points to a static buffer; it must 248 ** be copied if it's to be saved. 249 */ 250 u_int8_t * 251 ParseAddr(char *str) 252 { 253 static u_int8_t addr[RMP_ADDRLEN]; 254 char *cp; 255 unsigned i; 256 int part, subpart; 257 258 memset((char *)&addr[0], 0, RMP_ADDRLEN); /* zero static buffer */ 259 260 part = subpart = 0; 261 for (cp = str; *cp; cp++) { 262 /* 263 * A colon (`:') must be used to delimit each octet. 264 */ 265 if (*cp == ':') { 266 if (++part == RMP_ADDRLEN) /* too many parts */ 267 return(NULL); 268 subpart = 0; 269 continue; 270 } 271 272 /* 273 * Convert hex character to an integer. 274 */ 275 if (isdigit(*cp)) 276 i = *cp - '0'; 277 else { 278 i = (isupper(*cp)? tolower(*cp): *cp) - 'a' + 10; 279 if (i < 10 || i > 15) /* not a hex char */ 280 return(NULL); 281 } 282 283 if (subpart++) { 284 if (subpart > 2) /* too many hex chars */ 285 return(NULL); 286 addr[part] <<= 4; 287 } 288 addr[part] |= i; 289 } 290 291 if (part != (RMP_ADDRLEN-1)) /* too few parts */ 292 return(NULL); 293 294 return(&addr[0]); 295 } 296 297 /* 298 ** GetBootFiles -- record list of files in current (boot) directory. 299 ** 300 ** Parameters: 301 ** None. 302 ** 303 ** Returns: 304 ** Number of boot files on success, 0 on failure. 305 ** 306 ** Side Effects: 307 ** Strings in `BootFiles' are freed/allocated. 308 ** 309 ** Warnings: 310 ** - After this routine is called, ParseConfig() must be 311 ** called to re-order it's list of boot file pointers. 312 */ 313 int 314 GetBootFiles(void) 315 { 316 DIR *dfd; 317 struct stat statb; 318 struct dirent *dp; 319 int i; 320 321 /* 322 * Free the current list of boot files. 323 */ 324 for (i = 0; i < C_MAXFILE && BootFiles[i] != NULL; i++) { 325 FreeStr(BootFiles[i]); 326 BootFiles[i] = NULL; 327 } 328 329 /* 330 * Open current directory to read boot file names. 331 */ 332 if ((dfd = opendir(".")) == NULL) { /* open BootDir */ 333 syslog(LOG_ERR, "GetBootFiles: can't open directory (%s)\n", 334 BootDir); 335 return(0); 336 } 337 338 /* 339 * Read each boot file name and allocate space for it in the 340 * list of boot files (BootFiles). All boot files read after 341 * C_MAXFILE will be ignored. 342 */ 343 i = 0; 344 for (dp = readdir(dfd); dp != NULL; dp = readdir(dfd)) { 345 if (stat(dp->d_name, &statb) < 0 || 346 (statb.st_mode & S_IFMT) != S_IFREG) 347 continue; 348 if (i == C_MAXFILE) 349 syslog(LOG_ERR, 350 "GetBootFiles: too many boot files (%s ignored)", 351 dp->d_name); 352 else if ((BootFiles[i] = NewStr(dp->d_name)) != NULL) 353 i++; 354 } 355 356 (void) closedir(dfd); /* close BootDir */ 357 358 if (i == 0) /* cant find any boot files */ 359 syslog(LOG_ERR, "GetBootFiles: no boot files (%s)\n", BootDir); 360 361 return(i); 362 } 363