bootparamd.c revision 1.13
1 /* $NetBSD: bootparamd.c,v 1.13 1997/09/08 02:21:52 mikel Exp $ */ 2 3 /* 4 * This code is not copyright, and is placed in the public domain. 5 * Feel free to use and modify. Please send modifications and/or 6 * suggestions + bug fixes to Klas Heggemann <klas (at) nada.kth.se> 7 * 8 * Various small changes by Theo de Raadt <deraadt (at) fsa.ca> 9 * Parser rewritten (adding YP support) by Roland McGrath <roland (at) frob.com> 10 */ 11 12 #include <sys/cdefs.h> 13 #ifndef lint 14 __RCSID("$NetBSD: bootparamd.c,v 1.13 1997/09/08 02:21:52 mikel Exp $"); 15 #endif 16 17 #include <sys/types.h> 18 #include <sys/ioctl.h> 19 #include <sys/stat.h> 20 #include <sys/socket.h> 21 22 #include <ctype.h> 23 #include <err.h> 24 #include <netdb.h> 25 #include <stdlib.h> 26 #include <stdio.h> 27 #include <string.h> 28 #include <syslog.h> 29 #include <unistd.h> 30 31 #include <netinet/in.h> 32 #include <arpa/inet.h> 33 34 #include <rpc/rpc.h> 35 #include <rpc/pmap_clnt.h> 36 #include <rpcsvc/bootparam_prot.h> 37 #include <rpcsvc/ypclnt.h> 38 39 #include "pathnames.h" 40 41 #define MAXLEN 800 42 43 static char hostname[MAX_MACHINE_NAME]; 44 static char askname[MAX_MACHINE_NAME]; 45 static char domain_name[MAX_MACHINE_NAME]; 46 47 extern void bootparamprog_1 __P((struct svc_req *, SVCXPRT *)); 48 49 int _rpcsvcdirty = 0; 50 int _rpcpmstart = 0; 51 int debug = 0; 52 int dolog = 0; 53 struct in_addr route_addr; 54 struct sockaddr_in my_addr; 55 extern char *__progname; 56 char *bootpfile = _PATH_BOOTPARAMS; 57 58 int main __P((int, char *[])); 59 int lookup_bootparam __P((char *, char *, char *, char **, char **)); 60 void usage __P((void)); 61 62 63 /* 64 * ever familiar 65 */ 66 int 67 main(argc, argv) 68 int argc; 69 char *argv[]; 70 { 71 SVCXPRT *transp; 72 struct hostent *he; 73 struct stat buf; 74 int c; 75 76 while ((c = getopt(argc, argv, "dsr:f:")) != -1) 77 switch (c) { 78 case 'd': 79 debug = 1; 80 break; 81 case 'r': 82 if (isdigit(*optarg)) { 83 if (inet_aton(optarg, &route_addr) != 0) 84 break; 85 } 86 he = gethostbyname(optarg); 87 if (he == 0) { 88 warnx("no such host: %s", optarg); 89 usage(); 90 } 91 bcopy(he->h_addr, &route_addr.s_addr, he->h_length); 92 break; 93 case 'f': 94 bootpfile = optarg; 95 break; 96 case 's': 97 dolog = 1; 98 #ifndef LOG_DAEMON 99 openlog(__progname, 0, 0); 100 #else 101 openlog(__progname, 0, LOG_DAEMON); 102 setlogmask(LOG_UPTO(LOG_NOTICE)); 103 #endif 104 break; 105 default: 106 usage(); 107 } 108 109 if (stat(bootpfile, &buf)) 110 err(1, "%s", bootpfile); 111 112 if (route_addr.s_addr == 0) { 113 get_myaddress(&my_addr); 114 route_addr.s_addr = my_addr.sin_addr.s_addr; 115 } 116 if (!debug) { 117 if (daemon(0, 0)) 118 err(1, "can't detach from terminal"); 119 } 120 121 (void) pmap_unset(BOOTPARAMPROG, BOOTPARAMVERS); 122 123 transp = svcudp_create(RPC_ANYSOCK); 124 if (transp == NULL) 125 errx(1, "can't create udp service"); 126 127 if (!svc_register(transp, BOOTPARAMPROG, BOOTPARAMVERS, bootparamprog_1, 128 IPPROTO_UDP)) 129 errx(1, "unable to register BOOTPARAMPROG version %ld, udp", 130 BOOTPARAMVERS); 131 132 svc_run(); 133 errx(1, "svc_run returned"); 134 } 135 136 bp_whoami_res * 137 bootparamproc_whoami_1_svc(whoami, rqstp) 138 bp_whoami_arg *whoami; 139 struct svc_req *rqstp; 140 { 141 static bp_whoami_res res; 142 struct hostent *he; 143 struct in_addr inaddr; 144 long haddr; 145 146 if (debug) 147 warnx("whoami got question for %d.%d.%d.%d", 148 255 & whoami->client_address.bp_address_u.ip_addr.net, 149 255 & whoami->client_address.bp_address_u.ip_addr.host, 150 255 & whoami->client_address.bp_address_u.ip_addr.lh, 151 255 & whoami->client_address.bp_address_u.ip_addr.impno); 152 if (dolog) 153 syslog(LOG_NOTICE, "whoami got question for %d.%d.%d.%d", 154 255 & whoami->client_address.bp_address_u.ip_addr.net, 155 255 & whoami->client_address.bp_address_u.ip_addr.host, 156 255 & whoami->client_address.bp_address_u.ip_addr.lh, 157 255 & whoami->client_address.bp_address_u.ip_addr.impno); 158 159 bcopy((char *) &whoami->client_address.bp_address_u.ip_addr, (char *) &haddr, 160 sizeof(haddr)); 161 he = gethostbyaddr((char *) &haddr, sizeof(haddr), AF_INET); 162 if (he) 163 strcpy(askname, he->h_name); 164 else { 165 inaddr.s_addr = haddr; 166 strcpy(askname, inet_ntoa(inaddr)); 167 } 168 169 if (debug) 170 warnx("This is host %s", askname); 171 if (dolog) 172 syslog(LOG_NOTICE, "This is host %s", askname); 173 174 if (!lookup_bootparam(askname, hostname, NULL, NULL, NULL)) { 175 res.client_name = hostname; 176 getdomainname(domain_name, MAX_MACHINE_NAME); 177 res.domain_name = domain_name; 178 179 if (res.router_address.address_type != IP_ADDR_TYPE) { 180 res.router_address.address_type = IP_ADDR_TYPE; 181 bcopy(&route_addr.s_addr, 182 &res.router_address.bp_address_u.ip_addr, 4); 183 } 184 if (debug) 185 warnx("Returning %s %s %d.%d.%d.%d", 186 res.client_name, res.domain_name, 187 255 & res.router_address.bp_address_u.ip_addr.net, 188 255 & res.router_address.bp_address_u.ip_addr.host, 189 255 & res.router_address.bp_address_u.ip_addr.lh, 190 255 & res.router_address.bp_address_u.ip_addr.impno); 191 if (dolog) 192 syslog(LOG_NOTICE, "Returning %s %s %d.%d.%d.%d", 193 res.client_name, res.domain_name, 194 255 & res.router_address.bp_address_u.ip_addr.net, 195 255 & res.router_address.bp_address_u.ip_addr.host, 196 255 & res.router_address.bp_address_u.ip_addr.lh, 197 255 & res.router_address.bp_address_u.ip_addr.impno); 198 199 return (&res); 200 } 201 if (debug) 202 warnx("whoami failed"); 203 if (dolog) 204 syslog(LOG_NOTICE, "whoami failed"); 205 return (NULL); 206 } 207 208 209 bp_getfile_res * 210 bootparamproc_getfile_1_svc(getfile, rqstp) 211 bp_getfile_arg *getfile; 212 struct svc_req *rqstp; 213 { 214 static bp_getfile_res res; 215 struct hostent *he; 216 int err; 217 218 if (debug) 219 warnx("getfile got question for \"%s\" and file \"%s\"", 220 getfile->client_name, getfile->file_id); 221 222 if (dolog) 223 syslog(LOG_NOTICE, 224 "getfile got question for \"%s\" and file \"%s\"", 225 getfile->client_name, getfile->file_id); 226 227 he = NULL; 228 he = gethostbyname(getfile->client_name); 229 if (!he) 230 goto failed; 231 232 strcpy(askname, he->h_name); 233 err = lookup_bootparam(askname, NULL, getfile->file_id, 234 &res.server_name, &res.server_path); 235 if (err == 0) { 236 he = gethostbyname(res.server_name); 237 if (!he) 238 goto failed; 239 bcopy(he->h_addr, &res.server_address.bp_address_u.ip_addr, 4); 240 res.server_address.address_type = IP_ADDR_TYPE; 241 } else if (err == ENOENT && !strcmp(getfile->file_id, "dump")) { 242 /* Special for dump, answer with null strings. */ 243 res.server_name[0] = '\0'; 244 res.server_path[0] = '\0'; 245 bzero(&res.server_address.bp_address_u.ip_addr, 4); 246 } else { 247 failed: 248 if (debug) 249 warnx("getfile failed for %s", 250 getfile->client_name); 251 if (dolog) 252 syslog(LOG_NOTICE, 253 "getfile failed for %s", getfile->client_name); 254 return (NULL); 255 } 256 257 if (debug) 258 warnx( 259 "returning server:%s path:%s address: %d.%d.%d.%d", 260 res.server_name, res.server_path, 261 255 & res.server_address.bp_address_u.ip_addr.net, 262 255 & res.server_address.bp_address_u.ip_addr.host, 263 255 & res.server_address.bp_address_u.ip_addr.lh, 264 255 & res.server_address.bp_address_u.ip_addr.impno); 265 if (dolog) 266 syslog(LOG_NOTICE, 267 "returning server:%s path:%s address: %d.%d.%d.%d", 268 res.server_name, res.server_path, 269 255 & res.server_address.bp_address_u.ip_addr.net, 270 255 & res.server_address.bp_address_u.ip_addr.host, 271 255 & res.server_address.bp_address_u.ip_addr.lh, 272 255 & res.server_address.bp_address_u.ip_addr.impno); 273 return (&res); 274 } 275 276 277 int 278 lookup_bootparam(client, client_canonical, id, server, path) 279 char *client; 280 char *client_canonical; 281 char *id; 282 char **server; 283 char **path; 284 { 285 FILE *f = fopen(bootpfile, "r"); 286 #ifdef YP 287 static char *ypbuf = NULL; 288 static int ypbuflen = 0; 289 #endif 290 static char buf[BUFSIZ]; 291 char *bp, *word = NULL; 292 size_t idlen = id == NULL ? 0 : strlen(id); 293 int contin = 0; 294 int found = 0; 295 296 if (f == NULL) 297 return EINVAL; /* ? */ 298 299 while (fgets(buf, sizeof buf, f)) { 300 int wascontin = contin; 301 contin = buf[strlen(buf) - 2] == '\\'; 302 bp = buf + strspn(buf, " \t\n"); 303 304 switch (wascontin) { 305 case -1: 306 /* Continuation of uninteresting line */ 307 contin *= -1; 308 continue; 309 case 0: 310 /* New line */ 311 contin *= -1; 312 if (*bp == '#') 313 continue; 314 if ((word = strsep(&bp, " \t\n")) == NULL) 315 continue; 316 #ifdef YP 317 /* A + in the file means try YP now */ 318 if (!strcmp(word, "+")) { 319 char *ypdom; 320 321 if (yp_get_default_domain(&ypdom) || 322 yp_match(ypdom, "bootparams", client, 323 strlen(client), &ypbuf, &ypbuflen)) 324 continue; 325 bp = ypbuf; 326 word = client; 327 contin *= -1; 328 break; 329 } 330 #endif 331 /* See if this line's client is the one we are 332 * looking for */ 333 if (strcasecmp(word, client) != 0) { 334 /* 335 * If it didn't match, try getting the 336 * canonical host name of the client 337 * on this line and comparing that to 338 * the client we are looking for 339 */ 340 struct hostent *hp = gethostbyname(word); 341 if (hp == NULL || 342 strcasecmp(hp->h_name, client)) 343 continue; 344 } 345 contin *= -1; 346 break; 347 case 1: 348 /* Continued line we want to parse below */ 349 break; 350 } 351 352 if (client_canonical) 353 strncpy(client_canonical, word, MAX_MACHINE_NAME); 354 355 /* We have found a line for CLIENT */ 356 if (id == NULL) { 357 (void) fclose(f); 358 return 0; 359 } 360 361 /* Look for a value for the parameter named by ID */ 362 while ((word = strsep(&bp, " \t\n")) != NULL) { 363 if (!strncmp(word, id, idlen) && word[idlen] == '=') { 364 /* We have found the entry we want */ 365 *server = &word[idlen + 1]; 366 *path = strchr(*server, ':'); 367 if (*path == NULL) 368 /* Malformed entry */ 369 continue; 370 *(*path)++ = '\0'; 371 (void) fclose(f); 372 return 0; 373 } 374 } 375 376 found = 1; 377 } 378 379 (void) fclose(f); 380 return found ? ENOENT : EPERM; 381 } 382 383 void 384 usage() 385 { 386 fprintf(stderr, 387 "usage: %s [-d] [-s] [-r router] [-f bootparmsfile]\n", __progname); 388 exit(1); 389 } 390
Indexes created Sat Sep 20 22:09:52 GMT 2025