1 /* $NetBSD: getnetconfig.c,v 1.3 2000/07/06 03:10:34 christos Exp $ */ 2 3 /*- 4 * SPDX-License-Identifier: BSD-3-Clause 5 * 6 * Copyright (c) 2009, Sun Microsystems, Inc. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions are met: 11 * - Redistributions of source code must retain the above copyright notice, 12 * this list of conditions and the following disclaimer. 13 * - Redistributions in binary form must reproduce the above copyright notice, 14 * this list of conditions and the following disclaimer in the documentation 15 * and/or other materials provided with the distribution. 16 * - Neither the name of Sun Microsystems, Inc. nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 21 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #if defined(LIBC_SCCS) && !defined(lint) 34 static char sccsid[] = "@(#)getnetconfig.c 1.12 91/12/19 SMI"; 35 #endif 36 /* 37 * Copyright (c) 1989 by Sun Microsystems, Inc. 38 */ 39 40 #include "namespace.h" 41 #include "reentrant.h" 42 #include <stdio.h> 43 #include <errno.h> 44 #include <netconfig.h> 45 #include <stddef.h> 46 #include <stdlib.h> 47 #include <string.h> 48 #include <rpc/rpc.h> 49 #include <unistd.h> 50 #include "un-namespace.h" 51 #include "rpc_com.h" 52 53 /* 54 * The five library routines in this file provide application access to the 55 * system network configuration database, /etc/netconfig. In addition to the 56 * netconfig database and the routines for accessing it, the environment 57 * variable NETPATH and its corresponding routines in getnetpath.c may also be 58 * used to specify the network transport to be used. 59 */ 60 61 62 /* 63 * netconfig errors 64 */ 65 66 #define NC_NONETCONFIG ENOENT 67 #define NC_NOMEM ENOMEM 68 #define NC_NOTINIT EINVAL /* setnetconfig was not called first */ 69 #define NC_BADFILE EBADF /* format for netconfig file is bad */ 70 #define NC_NOTFOUND ENOPROTOOPT /* specified netid was not found */ 71 72 /* 73 * semantics as strings (should be in netconfig.h) 74 */ 75 #define NC_TPI_CLTS_S "tpi_clts" 76 #define NC_TPI_COTS_S "tpi_cots" 77 #define NC_TPI_COTS_ORD_S "tpi_cots_ord" 78 #define NC_TPI_RAW_S "tpi_raw" 79 80 /* 81 * flags as characters (also should be in netconfig.h) 82 */ 83 #define NC_NOFLAG_C '-' 84 #define NC_VISIBLE_C 'v' 85 #define NC_BROADCAST_C 'b' 86 87 /* 88 * Character used to indicate there is no name-to-address lookup library 89 */ 90 #define NC_NOLOOKUP "-" 91 92 static const char * const _nc_errors[] = { 93 "Netconfig database not found", 94 "Not enough memory", 95 "Not initialized", 96 "Netconfig database has invalid format", 97 "Netid not found in netconfig database" 98 }; 99 100 struct netconfig_info { 101 int eof; /* all entries has been read */ 102 int ref; /* # of times setnetconfig() has been called */ 103 struct netconfig_list *head; /* head of the list */ 104 struct netconfig_list *tail; /* last of the list */ 105 }; 106 107 struct netconfig_list { 108 char *linep; /* hold line read from netconfig */ 109 struct netconfig *ncp; 110 struct netconfig_list *next; 111 }; 112 113 struct netconfig_vars { 114 int valid; /* token that indicates a valid netconfig_vars */ 115 int flag; /* first time flag */ 116 struct netconfig_list *nc_configs; /* pointer to the current netconfig entry */ 117 }; 118 119 #define NC_VALID 0xfeed 120 #define NC_STORAGE 0xf00d 121 #define NC_INVALID 0 122 123 124 static int *__nc_error(void); 125 static int parse_ncp(char *, struct netconfig *); 126 static struct netconfig *dup_ncp(struct netconfig *); 127 128 129 static FILE *nc_file; /* for netconfig db */ 130 static mutex_t nc_file_lock = MUTEX_INITIALIZER; 131 132 static struct netconfig_info ni = { 0, 0, NULL, NULL}; 133 static mutex_t ni_lock = MUTEX_INITIALIZER; 134 135 static thread_key_t nc_key; 136 static once_t nc_once = ONCE_INITIALIZER; 137 static int nc_key_error; 138 139 static void 140 nc_key_init(void) 141 { 142 143 nc_key_error = thr_keycreate(&nc_key, free); 144 } 145 146 #define MAXNETCONFIGLINE 1000 147 148 static int * 149 __nc_error(void) 150 { 151 static int nc_error = 0; 152 int *nc_addr; 153 154 /* 155 * Use the static `nc_error' if we are the main thread 156 * (including non-threaded programs), or if an allocation 157 * fails. 158 */ 159 if (thr_main()) 160 return (&nc_error); 161 if (thr_once(&nc_once, nc_key_init) != 0 || nc_key_error != 0) 162 return (&nc_error); 163 if ((nc_addr = (int *)thr_getspecific(nc_key)) == NULL) { 164 nc_addr = (int *)malloc(sizeof (int)); 165 if (thr_setspecific(nc_key, (void *) nc_addr) != 0) { 166 free(nc_addr); 167 return (&nc_error); 168 } 169 *nc_addr = 0; 170 } 171 return (nc_addr); 172 } 173 174 #define nc_error (*(__nc_error())) 175 /* 176 * A call to setnetconfig() establishes a /etc/netconfig "session". A session 177 * "handle" is returned on a successful call. At the start of a session (after 178 * a call to setnetconfig()) searches through the /etc/netconfig database will 179 * proceed from the start of the file. The session handle must be passed to 180 * getnetconfig() to parse the file. Each call to getnetconfig() using the 181 * current handle will process one subsequent entry in /etc/netconfig. 182 * setnetconfig() must be called before the first call to getnetconfig(). 183 * (Handles are used to allow for nested calls to setnetpath()). 184 * 185 * A new session is established with each call to setnetconfig(), with a new 186 * handle being returned on each call. Previously established sessions remain 187 * active until endnetconfig() is called with that session's handle as an 188 * argument. 189 * 190 * setnetconfig() need *not* be called before a call to getnetconfigent(). 191 * setnetconfig() returns a NULL pointer on failure (for example, if 192 * the netconfig database is not present). 193 */ 194 void * 195 setnetconfig(void) 196 { 197 struct netconfig_vars *nc_vars; 198 199 if ((nc_vars = (struct netconfig_vars *)malloc(sizeof 200 (struct netconfig_vars))) == NULL) { 201 return(NULL); 202 } 203 204 /* 205 * For multiple calls, i.e. nc_file is not NULL, we just return the 206 * handle without reopening the netconfig db. 207 */ 208 mutex_lock(&ni_lock); 209 ni.ref++; 210 mutex_unlock(&ni_lock); 211 212 mutex_lock(&nc_file_lock); 213 if ((nc_file != NULL) || (nc_file = fopen(NETCONFIG, "r")) != NULL) { 214 nc_vars->valid = NC_VALID; 215 nc_vars->flag = 0; 216 nc_vars->nc_configs = ni.head; 217 mutex_unlock(&nc_file_lock); 218 return ((void *)nc_vars); 219 } 220 mutex_unlock(&nc_file_lock); 221 222 mutex_lock(&ni_lock); 223 ni.ref--; 224 mutex_unlock(&ni_lock); 225 226 nc_error = NC_NONETCONFIG; 227 free(nc_vars); 228 return (NULL); 229 } 230 231 232 /* 233 * When first called, getnetconfig() returns a pointer to the first entry in 234 * the netconfig database, formatted as a struct netconfig. On each subsequent 235 * call, getnetconfig() returns a pointer to the next entry in the database. 236 * getnetconfig() can thus be used to search the entire netconfig file. 237 * getnetconfig() returns NULL at end of file. 238 */ 239 240 struct netconfig * 241 getnetconfig(void *handlep) 242 { 243 struct netconfig_vars *ncp = (struct netconfig_vars *)handlep; 244 char *stringp; /* tmp string pointer */ 245 struct netconfig_list *list; 246 struct netconfig *np; 247 struct netconfig *result; 248 249 /* 250 * Verify that handle is valid 251 */ 252 mutex_lock(&nc_file_lock); 253 if (ncp == NULL || nc_file == NULL) { 254 nc_error = NC_NOTINIT; 255 mutex_unlock(&nc_file_lock); 256 return (NULL); 257 } 258 mutex_unlock(&nc_file_lock); 259 260 switch (ncp->valid) { 261 case NC_VALID: 262 /* 263 * If entry has already been read into the list, 264 * we return the entry in the linked list. 265 * If this is the first time call, check if there are any entries in 266 * linked list. If no entries, we need to read the netconfig db. 267 * If we have been here and the next entry is there, we just return 268 * it. 269 */ 270 if (ncp->flag == 0) { /* first time */ 271 ncp->flag = 1; 272 mutex_lock(&ni_lock); 273 ncp->nc_configs = ni.head; 274 mutex_unlock(&ni_lock); 275 if (ncp->nc_configs != NULL) /* entry already exist */ 276 return(ncp->nc_configs->ncp); 277 } 278 else if (ncp->nc_configs != NULL && ncp->nc_configs->next != NULL) { 279 ncp->nc_configs = ncp->nc_configs->next; 280 return(ncp->nc_configs->ncp); 281 } 282 283 /* 284 * If we cannot find the entry in the list and is end of file, 285 * we give up. 286 */ 287 mutex_lock(&ni_lock); 288 if (ni.eof == 1) { 289 mutex_unlock(&ni_lock); 290 return(NULL); 291 } 292 mutex_unlock(&ni_lock); 293 294 break; 295 default: 296 nc_error = NC_NOTINIT; 297 return (NULL); 298 } 299 300 stringp = (char *) malloc(MAXNETCONFIGLINE); 301 if (stringp == NULL) 302 return (NULL); 303 304 #ifdef MEM_CHK 305 if (malloc_verify() == 0) { 306 fprintf(stderr, "memory heap corrupted in getnetconfig\n"); 307 exit(1); 308 } 309 #endif 310 311 /* 312 * Read a line from netconfig file. 313 */ 314 mutex_lock(&nc_file_lock); 315 do { 316 if (fgets(stringp, MAXNETCONFIGLINE, nc_file) == NULL) { 317 free(stringp); 318 mutex_lock(&ni_lock); 319 ni.eof = 1; 320 mutex_unlock(&ni_lock); 321 mutex_unlock(&nc_file_lock); 322 return (NULL); 323 } 324 } while (*stringp == '#'); 325 mutex_unlock(&nc_file_lock); 326 327 list = (struct netconfig_list *) malloc(sizeof (struct netconfig_list)); 328 if (list == NULL) { 329 free(stringp); 330 return(NULL); 331 } 332 np = (struct netconfig *) malloc(sizeof (struct netconfig)); 333 if (np == NULL) { 334 free(stringp); 335 free(list); 336 return(NULL); 337 } 338 list->ncp = np; 339 list->next = NULL; 340 list->ncp->nc_lookups = NULL; 341 list->linep = stringp; 342 if (parse_ncp(stringp, list->ncp) == -1) { 343 free(stringp); 344 free(np); 345 free(list); 346 return (NULL); 347 } 348 else { 349 /* 350 * If this is the first entry that's been read, it is the head of 351 * the list. If not, put the entry at the end of the list. 352 * Reposition the current pointer of the handle to the last entry 353 * in the list. 354 */ 355 mutex_lock(&ni_lock); 356 if (ni.head == NULL) { /* first entry */ 357 ni.head = ni.tail = list; 358 } 359 else { 360 ni.tail->next = list; 361 ni.tail = ni.tail->next; 362 } 363 ncp->nc_configs = ni.tail; 364 result = ni.tail->ncp; 365 mutex_unlock(&ni_lock); 366 return(result); 367 } 368 } 369 370 /* 371 * endnetconfig() may be called to "unbind" or "close" the netconfig database 372 * when processing is complete, releasing resources for reuse. endnetconfig() 373 * may not be called before setnetconfig(). endnetconfig() returns 0 on 374 * success and -1 on failure (for example, if setnetconfig() was not called 375 * previously). 376 */ 377 int 378 endnetconfig(void *handlep) 379 { 380 struct netconfig_vars *nc_handlep = (struct netconfig_vars *)handlep; 381 382 struct netconfig_list *q, *p; 383 384 /* 385 * Verify that handle is valid 386 */ 387 if (nc_handlep == NULL || (nc_handlep->valid != NC_VALID && 388 nc_handlep->valid != NC_STORAGE)) { 389 nc_error = NC_NOTINIT; 390 return (-1); 391 } 392 393 /* 394 * Return 0 if anyone still needs it. 395 */ 396 nc_handlep->valid = NC_INVALID; 397 nc_handlep->flag = 0; 398 nc_handlep->nc_configs = NULL; 399 mutex_lock(&ni_lock); 400 if (--ni.ref > 0) { 401 mutex_unlock(&ni_lock); 402 free(nc_handlep); 403 return(0); 404 } 405 406 /* 407 * No one needs these entries anymore, then frees them. 408 * Make sure all info in netconfig_info structure has been reinitialized. 409 */ 410 q = ni.head; 411 ni.eof = ni.ref = 0; 412 ni.head = NULL; 413 ni.tail = NULL; 414 mutex_unlock(&ni_lock); 415 416 while (q != NULL) { 417 p = q->next; 418 free(q->ncp->nc_lookups); 419 free(q->ncp); 420 free(q->linep); 421 free(q); 422 q = p; 423 } 424 free(nc_handlep); 425 426 mutex_lock(&nc_file_lock); 427 fclose(nc_file); 428 nc_file = NULL; 429 mutex_unlock(&nc_file_lock); 430 431 return (0); 432 } 433 434 /* 435 * getnetconfigent(netid) returns a pointer to the struct netconfig structure 436 * corresponding to netid. It returns NULL if netid is invalid (that is, does 437 * not name an entry in the netconfig database). It returns NULL and sets 438 * errno in case of failure (for example, if the netconfig database cannot be 439 * opened). 440 */ 441 442 struct netconfig * 443 getnetconfigent(const char *netid) 444 { 445 FILE *file; /* NETCONFIG db's file pointer */ 446 char *linep; /* holds current netconfig line */ 447 char *stringp; /* temporary string pointer */ 448 struct netconfig *ncp = NULL; /* returned value */ 449 struct netconfig_list *list; /* pointer to cache list */ 450 451 nc_error = NC_NOTFOUND; /* default error. */ 452 if (netid == NULL || strlen(netid) == 0) { 453 return (NULL); 454 } 455 456 /* 457 * Look up table if the entries have already been read and parsed in 458 * getnetconfig(), then copy this entry into a buffer and return it. 459 * If we cannot find the entry in the current list and there are more 460 * entries in the netconfig db that has not been read, we then read the 461 * db and try find the match netid. 462 * If all the netconfig db has been read and placed into the list and 463 * there is no match for the netid, return NULL. 464 */ 465 mutex_lock(&ni_lock); 466 if (ni.head != NULL) { 467 for (list = ni.head; list; list = list->next) { 468 if (strcmp(list->ncp->nc_netid, netid) == 0) { 469 mutex_unlock(&ni_lock); 470 return(dup_ncp(list->ncp)); 471 } 472 } 473 if (ni.eof == 1) { /* that's all the entries */ 474 mutex_unlock(&ni_lock); 475 return(NULL); 476 } 477 } 478 mutex_unlock(&ni_lock); 479 480 481 if ((file = fopen(NETCONFIG, "r")) == NULL) { 482 nc_error = NC_NONETCONFIG; 483 return (NULL); 484 } 485 486 if ((linep = malloc(MAXNETCONFIGLINE)) == NULL) { 487 fclose(file); 488 nc_error = NC_NOMEM; 489 return (NULL); 490 } 491 do { 492 ptrdiff_t len; 493 char *tmpp; /* tmp string pointer */ 494 495 do { 496 if ((stringp = fgets(linep, MAXNETCONFIGLINE, file)) == NULL) { 497 break; 498 } 499 } while (*stringp == '#'); 500 if (stringp == NULL) { /* eof */ 501 break; 502 } 503 if ((tmpp = strpbrk(stringp, "\t ")) == NULL) { /* can't parse file */ 504 nc_error = NC_BADFILE; 505 break; 506 } 507 if (strlen(netid) == (size_t) (len = tmpp - stringp) && /* a match */ 508 strncmp(stringp, netid, (size_t)len) == 0) { 509 if ((ncp = (struct netconfig *) 510 malloc(sizeof (struct netconfig))) == NULL) { 511 break; 512 } 513 ncp->nc_lookups = NULL; 514 if (parse_ncp(linep, ncp) == -1) { 515 free(ncp); 516 ncp = NULL; 517 } 518 break; 519 } 520 } while (stringp != NULL); 521 if (ncp == NULL) { 522 free(linep); 523 } 524 fclose(file); 525 return(ncp); 526 } 527 528 /* 529 * freenetconfigent(netconfigp) frees the netconfig structure pointed to by 530 * netconfigp (previously returned by getnetconfigent()). 531 */ 532 533 void 534 freenetconfigent(struct netconfig *netconfigp) 535 { 536 if (netconfigp != NULL) { 537 free(netconfigp->nc_netid); /* holds all netconfigp's strings */ 538 free(netconfigp->nc_lookups); 539 free(netconfigp); 540 } 541 return; 542 } 543 544 /* 545 * Parse line and stuff it in a struct netconfig 546 * Typical line might look like: 547 * udp tpi_cots vb inet udp /dev/udp /usr/lib/ip.so,/usr/local/ip.so 548 * 549 * We return -1 if any of the tokens don't parse, or malloc fails. 550 * 551 * Note that we modify stringp (putting NULLs after tokens) and 552 * we set the ncp's string field pointers to point to these tokens within 553 * stringp. 554 * 555 * stringp - string to parse 556 * ncp - where to put results 557 */ 558 559 static int 560 parse_ncp(char *stringp, struct netconfig *ncp) 561 { 562 char *tokenp; /* for processing tokens */ 563 char *lasts; 564 char **nc_lookups; 565 566 nc_error = NC_BADFILE; /* nearly anything that breaks is for this reason */ 567 stringp[strlen(stringp)-1] = '\0'; /* get rid of newline */ 568 /* netid */ 569 if ((ncp->nc_netid = strtok_r(stringp, "\t ", &lasts)) == NULL) { 570 return (-1); 571 } 572 573 /* semantics */ 574 if ((tokenp = strtok_r(NULL, "\t ", &lasts)) == NULL) { 575 return (-1); 576 } 577 if (strcmp(tokenp, NC_TPI_COTS_ORD_S) == 0) 578 ncp->nc_semantics = NC_TPI_COTS_ORD; 579 else if (strcmp(tokenp, NC_TPI_COTS_S) == 0) 580 ncp->nc_semantics = NC_TPI_COTS; 581 else if (strcmp(tokenp, NC_TPI_CLTS_S) == 0) 582 ncp->nc_semantics = NC_TPI_CLTS; 583 else if (strcmp(tokenp, NC_TPI_RAW_S) == 0) 584 ncp->nc_semantics = NC_TPI_RAW; 585 else 586 return (-1); 587 588 /* flags */ 589 if ((tokenp = strtok_r(NULL, "\t ", &lasts)) == NULL) { 590 return (-1); 591 } 592 for (ncp->nc_flag = NC_NOFLAG; *tokenp != '\0'; 593 tokenp++) { 594 switch (*tokenp) { 595 case NC_NOFLAG_C: 596 break; 597 case NC_VISIBLE_C: 598 ncp->nc_flag |= NC_VISIBLE; 599 break; 600 case NC_BROADCAST_C: 601 ncp->nc_flag |= NC_BROADCAST; 602 break; 603 default: 604 return (-1); 605 } 606 } 607 /* protocol family */ 608 if ((ncp->nc_protofmly = strtok_r(NULL, "\t ", &lasts)) == NULL) { 609 return (-1); 610 } 611 /* protocol name */ 612 if ((ncp->nc_proto = strtok_r(NULL, "\t ", &lasts)) == NULL) { 613 return (-1); 614 } 615 /* network device */ 616 if ((ncp->nc_device = strtok_r(NULL, "\t ", &lasts)) == NULL) { 617 return (-1); 618 } 619 if ((tokenp = strtok_r(NULL, "\t ", &lasts)) == NULL) { 620 return (-1); 621 } 622 if (strcmp(tokenp, NC_NOLOOKUP) == 0) { 623 ncp->nc_nlookups = 0; 624 ncp->nc_lookups = NULL; 625 } else { 626 char *cp; /* tmp string */ 627 628 free(ncp->nc_lookups); /* from last visit */ 629 ncp->nc_lookups = NULL; 630 ncp->nc_nlookups = 0; 631 while ((cp = tokenp) != NULL) { 632 if ((nc_lookups = reallocarray(ncp->nc_lookups, 633 ncp->nc_nlookups + 1, sizeof(*ncp->nc_lookups))) == NULL) { 634 free(ncp->nc_lookups); 635 ncp->nc_lookups = NULL; 636 return (-1); 637 } 638 tokenp = _get_next_token(cp, ','); 639 ncp->nc_lookups = nc_lookups; 640 ncp->nc_lookups[ncp->nc_nlookups++] = cp; 641 } 642 } 643 return (0); 644 } 645 646 647 /* 648 * Returns a string describing the reason for failure. 649 */ 650 char * 651 nc_sperror(void) 652 { 653 const char *message; 654 655 switch(nc_error) { 656 case NC_NONETCONFIG: 657 message = _nc_errors[0]; 658 break; 659 case NC_NOMEM: 660 message = _nc_errors[1]; 661 break; 662 case NC_NOTINIT: 663 message = _nc_errors[2]; 664 break; 665 case NC_BADFILE: 666 message = _nc_errors[3]; 667 break; 668 case NC_NOTFOUND: 669 message = _nc_errors[4]; 670 break; 671 default: 672 message = "Unknown network selection error"; 673 } 674 /* LINTED const castaway */ 675 return ((char *)message); 676 } 677 678 /* 679 * Prints a message onto standard error describing the reason for failure. 680 */ 681 void 682 nc_perror(const char *s) 683 { 684 fprintf(stderr, "%s: %s\n", s, nc_sperror()); 685 } 686 687 /* 688 * Duplicates the matched netconfig buffer. 689 */ 690 static struct netconfig * 691 dup_ncp(struct netconfig *ncp) 692 { 693 struct netconfig *p; 694 char *tmp; 695 u_int i; 696 697 if ((tmp=malloc(MAXNETCONFIGLINE)) == NULL) 698 return(NULL); 699 if ((p=(struct netconfig *)malloc(sizeof(struct netconfig))) == NULL) { 700 free(tmp); 701 return(NULL); 702 } 703 /* 704 * First we dup all the data from matched netconfig buffer. Then we 705 * adjust some of the member pointer to a pre-allocated buffer where 706 * contains part of the data. 707 * To follow the convention used in parse_ncp(), we store all the 708 * necessary information in the pre-allocated buffer and let each 709 * of the netconfig char pointer member point to the right address 710 * in the buffer. 711 */ 712 *p = *ncp; 713 p->nc_netid = (char *)strcpy(tmp,ncp->nc_netid); 714 tmp = strchr(tmp, '\0') + 1; 715 p->nc_protofmly = (char *)strcpy(tmp,ncp->nc_protofmly); 716 tmp = strchr(tmp, '\0') + 1; 717 p->nc_proto = (char *)strcpy(tmp,ncp->nc_proto); 718 tmp = strchr(tmp, '\0') + 1; 719 p->nc_device = (char *)strcpy(tmp,ncp->nc_device); 720 p->nc_lookups = (char **)malloc((size_t)(p->nc_nlookups+1) * sizeof(char *)); 721 if (p->nc_lookups == NULL) { 722 free(p->nc_netid); 723 free(p); 724 return(NULL); 725 } 726 for (i=0; i < p->nc_nlookups; i++) { 727 tmp = strchr(tmp, '\0') + 1; 728 p->nc_lookups[i] = (char *)strcpy(tmp,ncp->nc_lookups[i]); 729 } 730 return(p); 731 } 732