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 * @(#)parseconf.c 8.1 (Berkeley) 6/4/93 47 * $FreeBSD: src/libexec/rbootd/parseconf.c,v 1.9.2.1 2001/03/05 11:17:52 kris Exp $ 48 * $DragonFly: src/libexec/rbootd/parseconf.c,v 1.3 2008/04/20 13:44:24 swildner Exp $ 49 */ 50 51 #include <sys/param.h> 52 #include <sys/stat.h> 53 #include <sys/time.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_int8_t *addr; 87 char line[C_LINELEN]; 88 char *cp, *bcp; 89 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 = strchr(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: can't 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 */ 246 u_int8_t * 247 ParseAddr(str) 248 char *str; 249 { 250 static u_int8_t addr[RMP_ADDRLEN]; 251 char *cp; 252 unsigned i; 253 int part, subpart; 254 255 memset((char *)&addr[0], 0, RMP_ADDRLEN); /* zero static buffer */ 256 257 part = subpart = 0; 258 for (cp = str; *cp; cp++) { 259 /* 260 * A colon (`:') must be used to delimit each octet. 261 */ 262 if (*cp == ':') { 263 if (++part == RMP_ADDRLEN) /* too many parts */ 264 return(NULL); 265 subpart = 0; 266 continue; 267 } 268 269 /* 270 * Convert hex character to an integer. 271 */ 272 if (isdigit(*cp)) 273 i = *cp - '0'; 274 else { 275 i = (isupper(*cp)? tolower(*cp): *cp) - 'a' + 10; 276 if (i < 10 || i > 15) /* not a hex char */ 277 return(NULL); 278 } 279 280 if (subpart++) { 281 if (subpart > 2) /* too many hex chars */ 282 return(NULL); 283 addr[part] <<= 4; 284 } 285 addr[part] |= i; 286 } 287 288 if (part != (RMP_ADDRLEN-1)) /* too few parts */ 289 return(NULL); 290 291 return(&addr[0]); 292 } 293 294 /* 295 ** GetBootFiles -- record list of files in current (boot) directory. 296 ** 297 ** Parameters: 298 ** None. 299 ** 300 ** Returns: 301 ** Number of boot files on success, 0 on failure. 302 ** 303 ** Side Effects: 304 ** Strings in `BootFiles' are freed/allocated. 305 ** 306 ** Warnings: 307 ** - After this routine is called, ParseConfig() must be 308 ** called to re-order it's list of boot file pointers. 309 */ 310 int 311 GetBootFiles() 312 { 313 DIR *dfd; 314 struct stat statb; 315 struct dirent *dp; 316 int i; 317 318 /* 319 * Free the current list of boot files. 320 */ 321 for (i = 0; i < C_MAXFILE && BootFiles[i] != NULL; i++) { 322 FreeStr(BootFiles[i]); 323 BootFiles[i] = NULL; 324 } 325 326 /* 327 * Open current directory to read boot file names. 328 */ 329 if ((dfd = opendir(".")) == NULL) { /* open BootDir */ 330 syslog(LOG_ERR, "GetBootFiles: can't open directory (%s)\n", 331 BootDir); 332 return(0); 333 } 334 335 /* 336 * Read each boot file name and allocate space for it in the 337 * list of boot files (BootFiles). All boot files read after 338 * C_MAXFILE will be ignored. 339 */ 340 i = 0; 341 for (dp = readdir(dfd); dp != NULL; dp = readdir(dfd)) { 342 if (stat(dp->d_name, &statb) < 0 || 343 (statb.st_mode & S_IFMT) != S_IFREG) 344 continue; 345 if (i == C_MAXFILE) 346 syslog(LOG_ERR, 347 "GetBootFiles: too many boot files (%s ignored)", 348 dp->d_name); 349 else if ((BootFiles[i] = NewStr(dp->d_name)) != NULL) 350 i++; 351 } 352 353 (void) closedir(dfd); /* close BootDir */ 354 355 if (i == 0) /* cant find any boot files */ 356 syslog(LOG_ERR, "GetBootFiles: no boot files (%s)\n", BootDir); 357 358 return(i); 359 } 360