1 /*
2 * Copyright (c) 2009, Sun Microsystems, Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 * - Redistributions of source code must retain the above copyright notice,
8 * this list of conditions and the following disclaimer.
9 * - Redistributions in binary form must reproduce the above copyright notice,
10 * this list of conditions and the following disclaimer in the documentation
11 * and/or other materials provided with the distribution.
12 * - Neither the name of Sun Microsystems, Inc. nor the names of its
13 * contributors may be used to endorse or promote products derived
14 * from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 /*
30 * Copyright (c) 1989 by Sun Microsystems, Inc.
31 */
32
33 #include <wintirpc.h>
34 //#include <pthread.h>
35 #include <reentrant.h>
36 //#include <sys/cdefs.h>
37 #include <stdio.h>
38 #include <errno.h>
39 #include <netconfig.h>
40 #include <stddef.h>
41 #include <stdlib.h>
42 #include <string.h>
43 #include <rpc/rpc.h>
44 //#include <unistd.h>
45 #include "rpc_com.h"
46
47 #ifndef __REACTOS__
48 // XXX FIXME - this is in wintirpc.c, but that is not currently built
wintirpc_debug(char * fmt,...)49 static void wintirpc_debug(char *fmt, ...)
50 {
51 return;
52 }
53 #else
54 #define MSVCRT_CHECK_PMT(x) (x)
strtok_s(char * str,const char * delim,char ** ctx)55 char * CDECL strtok_s(char *str, const char *delim, char **ctx)
56 {
57 if (!MSVCRT_CHECK_PMT(delim != NULL)) return NULL;
58 if (!MSVCRT_CHECK_PMT(ctx != NULL)) return NULL;
59 if (!MSVCRT_CHECK_PMT(str != NULL || *ctx != NULL)) return NULL;
60
61 if(!str)
62 str = *ctx;
63
64 while(*str && strchr(delim, *str))
65 str++;
66 if(!*str)
67 {
68 *ctx = str;
69 return NULL;
70 }
71
72 *ctx = str+1;
73 while(**ctx && !strchr(delim, **ctx))
74 (*ctx)++;
75 if(**ctx)
76 *(*ctx)++ = 0;
77
78 return str;
79 }
80 #endif
81
82 /*
83 * The five library routines in this file provide application access to the
84 * system network configuration database, /etc/netconfig. In addition to the
85 * netconfig database and the routines for accessing it, the environment
86 * variable NETPATH and its corresponding routines in getnetpath.c may also be
87 * used to specify the network transport to be used.
88 */
89
90 /*
91 * netconfig errors
92 */
93
94 #define NC_NONETCONFIG ENOENT
95 #define NC_NOMEM ENOMEM
96 #define NC_NOTINIT EINVAL /* setnetconfig was not called first */
97 #define NC_BADFILE EBADF /* format for netconfig file is bad */
98 #define NC_NOTFOUND WSAENOPROTOOPT /* specified netid was not found */
99
100 /*
101 * semantics as strings (should be in netconfig.h)
102 */
103 #define NC_TPI_CLTS_S "tpi_clts"
104 #define NC_TPI_COTS_S "tpi_cots"
105 #define NC_TPI_COTS_ORD_S "tpi_cots_ord"
106 #define NC_TPI_RAW_S "tpi_raw"
107
108 /*
109 * flags as characters (also should be in netconfig.h)
110 */
111 #define NC_NOFLAG_C '-'
112 #define NC_VISIBLE_C 'v'
113 #define NC_BROADCAST_C 'b'
114
115 /*
116 * Character used to indicate there is no name-to-address lookup library
117 */
118 #define NC_NOLOOKUP "-"
119
120 static const char * const _nc_errors[] = {
121 "Netconfig database not found",
122 "Not enough memory",
123 "Not initialized",
124 "Netconfig database has invalid format",
125 "Netid not found in netconfig database"
126 };
127
128 struct netconfig_info {
129 int eof; /* all entries has been read */
130 int ref; /* # of times setnetconfig() has been called */
131 struct netconfig_list *head; /* head of the list */
132 struct netconfig_list *tail; /* last of the list */
133 };
134
135 struct netconfig_list {
136 char *linep; /* hold line read from netconfig */
137 struct netconfig *ncp;
138 struct netconfig_list *next;
139 };
140
141 struct netconfig_vars {
142 int valid; /* token that indicates a valid netconfig_vars */
143 int flag; /* first time flag */
144 struct netconfig_list *nc_configs; /* pointer to the current netconfig entry */
145 };
146
147 #define NC_VALID 0xfeed
148 #define NC_STORAGE 0xf00d
149 #define NC_INVALID 0
150
151
152 static int *__nc_error(void);
153 static int parse_ncp(char *, struct netconfig *);
154 static struct netconfig *dup_ncp(struct netconfig *);
155
156
157 static FILE *nc_file; /* for netconfig db */
158 static struct netconfig_info ni = { 0, 0, NULL, NULL};
159
160 #define MAXNETCONFIGLINE 1000
161
162 static int *
__nc_error()163 __nc_error()
164 {
165 extern mutex_t nc_lock;
166 extern thread_key_t nc_key;
167 static int nc_error = 0;
168 int error, *nc_addr;
169
170 /*
171 * Use the static `nc_error' if we are the main thread
172 * (including non-threaded programs), or if an allocation
173 * fails.
174 */
175 if (nc_key == -1) {
176 error = 0;
177 mutex_lock(&nc_lock);
178 if (nc_key == -1)
179 error = nc_key = TlsAlloc(); //thr_keycreate(&nc_key, free);
180 mutex_unlock(&nc_lock);
181 if (error == TLS_OUT_OF_INDEXES)
182 return (&nc_error);
183 }
184 if ((nc_addr = (int *)thr_getspecific(nc_key)) == NULL) {
185 nc_addr = (int *)malloc(sizeof (int *));
186 if (thr_setspecific(nc_key, (void *) nc_addr) == 0) {
187 if (nc_addr)
188 free(nc_addr);
189 return (&nc_error);
190 }
191 *nc_addr = 0;
192 }
193 return (nc_addr);
194 }
195
196 #define nc_error (*(__nc_error()))
197 /*
198 * A call to setnetconfig() establishes a /etc/netconfig "session". A session
199 * "handle" is returned on a successful call. At the start of a session (after
200 * a call to setnetconfig()) searches through the /etc/netconfig database will
201 * proceed from the start of the file. The session handle must be passed to
202 * getnetconfig() to parse the file. Each call to getnetconfig() using the
203 * current handle will process one subsequent entry in /etc/netconfig.
204 * setnetconfig() must be called before the first call to getnetconfig().
205 * (Handles are used to allow for nested calls to setnetpath()).
206 *
207 * A new session is established with each call to setnetconfig(), with a new
208 * handle being returned on each call. Previously established sessions remain
209 * active until endnetconfig() is called with that session's handle as an
210 * argument.
211 *
212 * setnetconfig() need *not* be called before a call to getnetconfigent().
213 * setnetconfig() returns a NULL pointer on failure (for example, if
214 * the netconfig database is not present).
215 */
216 void *
setnetconfig()217 setnetconfig()
218 {
219 struct netconfig_vars *nc_vars;
220
221 if ((nc_vars = (struct netconfig_vars *)malloc(sizeof
222 (struct netconfig_vars))) == NULL) {
223 return(NULL);
224 }
225
226 /*
227 * For multiple calls, i.e. nc_file is not NULL, we just return the
228 * handle without reopening the netconfig db.
229 */
230 ni.ref++;
231 if ((nc_file != NULL) || (nc_file = fopen(NETCONFIG, "r")) != NULL) {
232 nc_vars->valid = NC_VALID;
233 nc_vars->flag = 0;
234 nc_vars->nc_configs = ni.head;
235 return ((void *)nc_vars);
236 }
237 ni.ref--;
238 nc_error = NC_NONETCONFIG;
239 free(nc_vars);
240 return (NULL);
241 }
242
243
244 /*
245 * When first called, getnetconfig() returns a pointer to the first entry in
246 * the netconfig database, formatted as a struct netconfig. On each subsequent
247 * call, getnetconfig() returns a pointer to the next entry in the database.
248 * getnetconfig() can thus be used to search the entire netconfig file.
249 * getnetconfig() returns NULL at end of file.
250 */
251
252 struct netconfig *
getnetconfig(handlep)253 getnetconfig(handlep)
254 void *handlep;
255 {
256 struct netconfig_vars *ncp = (struct netconfig_vars *)handlep;
257 char *stringp; /* tmp string pointer */
258 struct netconfig_list *list;
259 struct netconfig *np;
260
261 /*
262 * Verify that handle is valid
263 */
264 if (ncp == NULL || nc_file == NULL) {
265 nc_error = NC_NOTINIT;
266 return (NULL);
267 }
268
269 switch (ncp->valid) {
270 case NC_VALID:
271 /*
272 * If entry has already been read into the list,
273 * we return the entry in the linked list.
274 * If this is the first time call, check if there are any entries in
275 * linked list. If no entries, we need to read the netconfig db.
276 * If we have been here and the next entry is there, we just return
277 * it.
278 */
279 if (ncp->flag == 0) { /* first time */
280 ncp->flag = 1;
281 ncp->nc_configs = ni.head;
282 if (ncp->nc_configs != NULL) /* entry already exist */
283 return(ncp->nc_configs->ncp);
284 }
285 else if (ncp->nc_configs != NULL && ncp->nc_configs->next != NULL) {
286 ncp->nc_configs = ncp->nc_configs->next;
287 return(ncp->nc_configs->ncp);
288 }
289
290 /*
291 * If we cannot find the entry in the list and is end of file,
292 * we give up.
293 */
294 if (ni.eof == 1)
295 return(NULL);
296 break;
297 default:
298 nc_error = NC_NOTINIT;
299 return (NULL);
300 }
301
302 stringp = (char *) malloc(MAXNETCONFIGLINE);
303 if (stringp == NULL)
304 return (NULL);
305
306 #ifdef MEM_CHK
307 if (malloc_verify() == 0) {
308 fprintf(stderr, "memory heap corrupted in getnetconfig\n");
309 exit(1);
310 }
311 #endif
312
313 /*
314 * Read a line from netconfig file.
315 */
316 do {
317 if (fgets(stringp, MAXNETCONFIGLINE, nc_file) == NULL) {
318 free(stringp);
319 ni.eof = 1;
320 return (NULL);
321 }
322 } while (*stringp == '#');
323
324 list = (struct netconfig_list *) malloc(sizeof (struct netconfig_list));
325 if (list == NULL) {
326 free(stringp);
327 return(NULL);
328 }
329 np = (struct netconfig *) malloc(sizeof (struct netconfig));
330 if (np == NULL) {
331 free(stringp);
332 free(list);
333 return(NULL);
334 }
335 list->ncp = np;
336 list->next = NULL;
337 list->ncp->nc_lookups = NULL;
338 list->linep = stringp;
339 wintirpc_debug("%s: before parse: &list->linep %p, list->linep %p, stringp %p\n", __FUNCTION__, &list->linep, list->linep, stringp);
340 if (parse_ncp(stringp, list->ncp) == -1) {
341 free(stringp);
342 free(np);
343 free(list);
344 return (NULL);
345 } else {
346 wintirpc_debug("%s: after parse: list->linep %p, stringp %p\n", __FUNCTION__, list->linep, stringp);
347 /*
348 * If this is the first entry that's been read, it is the head of
349 * the list. If not, put the entry at the end of the list.
350 * Reposition the current pointer of the handle to the last entry
351 * in the list.
352 */
353 if (ni.head == NULL) { /* first entry */
354 ni.head = ni.tail = list;
355 }
356 else {
357 ni.tail->next = list;
358 ni.tail = ni.tail->next;
359 }
360 ncp->nc_configs = ni.tail;
361 return(ni.tail->ncp);
362 }
363 }
364
365 /*
366 * endnetconfig() may be called to "unbind" or "close" the netconfig database
367 * when processing is complete, releasing resources for reuse. endnetconfig()
368 * may not be called before setnetconfig(). endnetconfig() returns 0 on
369 * success and -1 on failure (for example, if setnetconfig() was not called
370 * previously).
371 */
372 int
endnetconfig(handlep)373 endnetconfig(handlep)
374 void *handlep;
375 {
376 struct netconfig_vars *nc_handlep = (struct netconfig_vars *)handlep;
377
378 struct netconfig_list *q, *p;
379
380 /*
381 * Verify that handle is valid
382 */
383 if (nc_handlep == NULL || (nc_handlep->valid != NC_VALID &&
384 nc_handlep->valid != NC_STORAGE)) {
385 nc_error = NC_NOTINIT;
386 return (-1);
387 }
388
389 /*
390 * Return 0 if anyone still needs it.
391 */
392 nc_handlep->valid = NC_INVALID;
393 nc_handlep->flag = 0;
394 nc_handlep->nc_configs = NULL;
395 if (--ni.ref > 0) {
396 free(nc_handlep);
397 return(0);
398 }
399
400 /*
401 * Noone needs these entries anymore, then frees them.
402 * Make sure all info in netconfig_info structure has been reinitialized.
403 */
404 q = p = ni.head;
405 ni.eof = ni.ref = 0;
406 ni.head = NULL;
407 ni.tail = NULL;
408 while (q) {
409 p = q->next;
410 if (q->ncp->nc_lookups != NULL) free(q->ncp->nc_lookups);
411 free(q->ncp);
412 free(q->linep);
413 free(q);
414 q = p;
415 }
416 free(nc_handlep);
417
418 fclose(nc_file);
419 nc_file = NULL;
420 return (0);
421 }
422
423 /*
424 * getnetconfigent(netid) returns a pointer to the struct netconfig structure
425 * corresponding to netid. It returns NULL if netid is invalid (that is, does
426 * not name an entry in the netconfig database). It returns NULL and sets
427 * errno in case of failure (for example, if the netconfig database cannot be
428 * opened).
429 */
430
431 struct netconfig *
getnetconfigent(netid)432 getnetconfigent(netid)
433 const char *netid;
434 {
435 FILE *file; /* NETCONFIG db's file pointer */
436 char *linep; /* holds current netconfig line */
437 char *stringp; /* temporary string pointer */
438 struct netconfig *ncp = NULL; /* returned value */
439 struct netconfig_list *list; /* pointer to cache list */
440
441 nc_error = NC_NOTFOUND; /* default error. */
442 if (netid == NULL || strlen(netid) == 0) {
443 return (NULL);
444 }
445
446 if (strcmp(netid, "unix") == 0) {
447 fprintf(stderr, "The local transport is called \"unix\" ");
448 fprintf(stderr, "in /etc/netconfig.\n");
449 fprintf(stderr, "Please change this to \"local\" manually ");
450 fprintf(stderr, "or run mergemaster(8).\n");
451 fprintf(stderr, "See UPDATING entry 20021216 for details.\n");
452 fprintf(stderr, "Continuing in 10 seconds\n\n");
453 fprintf(stderr, "This warning will be removed 20030301\n");
454 Sleep(10000); // sleep(10);
455 }
456
457 /*
458 * Look up table if the entries have already been read and parsed in
459 * getnetconfig(), then copy this entry into a buffer and return it.
460 * If we cannot find the entry in the current list and there are more
461 * entries in the netconfig db that has not been read, we then read the
462 * db and try find the match netid.
463 * If all the netconfig db has been read and placed into the list and
464 * there is no match for the netid, return NULL.
465 */
466 if (ni.head != NULL) {
467 for (list = ni.head; list; list = list->next) {
468 if (strcmp(list->ncp->nc_netid, netid) == 0) {
469 return(dup_ncp(list->ncp));
470 }
471 }
472 if (ni.eof == 1) /* that's all the entries */
473 return(NULL);
474 }
475
476
477 if ((file = fopen(NETCONFIG, "r")) == NULL) {
478 nc_error = NC_NONETCONFIG;
479 return (NULL);
480 }
481
482 if ((linep = malloc(MAXNETCONFIGLINE)) == NULL) {
483 fclose(file);
484 nc_error = NC_NOMEM;
485 return (NULL);
486 }
487 do {
488 ptrdiff_t len;
489 char *tmpp; /* tmp string pointer */
490
491 do {
492 if ((stringp = fgets(linep, MAXNETCONFIGLINE, file)) == NULL) {
493 break;
494 }
495 } while (*stringp == '#');
496 if (stringp == NULL) { /* eof */
497 break;
498 }
499 if ((tmpp = strpbrk(stringp, "\t ")) == NULL) { /* can't parse file */
500 nc_error = NC_BADFILE;
501 break;
502 }
503 if (strlen(netid) == (size_t) (len = tmpp - stringp) && /* a match */
504 strncmp(stringp, netid, (size_t)len) == 0) {
505 if ((ncp = (struct netconfig *)
506 malloc(sizeof (struct netconfig))) == NULL) {
507 break;
508 }
509 ncp->nc_lookups = NULL;
510 if (parse_ncp(linep, ncp) == -1) {
511 free(ncp);
512 ncp = NULL;
513 }
514 break;
515 }
516 } while (stringp != NULL);
517 if (ncp == NULL) {
518 free(linep);
519 }
520 fclose(file);
521 return(ncp);
522 }
523
524 /*
525 * freenetconfigent(netconfigp) frees the netconfig structure pointed to by
526 * netconfigp (previously returned by getnetconfigent()).
527 */
528
529 void
freenetconfigent(netconfigp)530 freenetconfigent(netconfigp)
531 struct netconfig *netconfigp;
532 {
533 if (netconfigp != NULL) {
534 free(netconfigp->nc_netid); /* holds all netconfigp's strings */
535 if (netconfigp->nc_lookups != NULL)
536 free(netconfigp->nc_lookups);
537 free(netconfigp);
538 }
539 return;
540 }
541
542 /*
543 * Parse line and stuff it in a struct netconfig
544 * Typical line might look like:
545 * udp tpi_cots vb inet udp /dev/udp /usr/lib/ip.so,/usr/local/ip.so
546 *
547 * We return -1 if any of the tokens don't parse, or malloc fails.
548 *
549 * Note that we modify stringp (putting NULLs after tokens) and
550 * we set the ncp's string field pointers to point to these tokens within
551 * stringp.
552 */
553
554 static int
parse_ncp(stringp,ncp)555 parse_ncp(stringp, ncp)
556 char *stringp; /* string to parse */
557 struct netconfig *ncp; /* where to put results */
558 {
559 char *tokenp; /* for processing tokens */
560 char *lasts;
561
562 nc_error = NC_BADFILE; /* nearly anything that breaks is for this reason */
563 wintirpc_debug("%s: The last character being chopped is '%02x'\n", __FUNCTION__, stringp[strlen(stringp)-1]);
564 wintirpc_debug("%s: The string before chopping is '%s'\n", __FUNCTION__, stringp);
565 stringp[strlen(stringp)-1] = '\0'; /* get rid of newline */
566 wintirpc_debug("%s: The last character after chopping is '%02x'\n", __FUNCTION__, stringp[strlen(stringp)-1]);
567 wintirpc_debug("%s: The string after chopping is '%s'\n", __FUNCTION__, stringp);
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 if (ncp->nc_lookups != NULL) /* from last visit */
629 free(ncp->nc_lookups);
630 /* preallocate one string pointer */
631 ncp->nc_lookups = (char **)malloc(sizeof (char *));
632 ncp->nc_nlookups = 0;
633 while ((cp = tokenp) != NULL) {
634 tokenp = _get_next_token(cp, ',');
635 ncp->nc_lookups[(size_t)ncp->nc_nlookups++] = cp;
636 ncp->nc_lookups = (char **)realloc(ncp->nc_lookups,
637 (size_t)(ncp->nc_nlookups+1) *sizeof(char *)); /* for next loop */
638 }
639 }
640 return (0);
641 }
642
643
644 /*
645 * Returns a string describing the reason for failure.
646 */
647 char *
nc_sperror()648 nc_sperror()
649 {
650 const char *message;
651
652 switch(nc_error) {
653 case NC_NONETCONFIG:
654 message = _nc_errors[0];
655 break;
656 case NC_NOMEM:
657 message = _nc_errors[1];
658 break;
659 case NC_NOTINIT:
660 message = _nc_errors[2];
661 break;
662 case NC_BADFILE:
663 message = _nc_errors[3];
664 break;
665 case NC_NOTFOUND:
666 message = _nc_errors[4];
667 break;
668 default:
669 message = "Unknown network selection error";
670 }
671 /* LINTED const castaway */
672 return ((char *)message);
673 }
674
675 /*
676 * Prints a message onto standard error describing the reason for failure.
677 */
678 void
nc_perror(s)679 nc_perror(s)
680 const char *s;
681 {
682 fprintf(stderr, "%s: %s\n", s, nc_sperror());
683 }
684
685 /*
686 * Duplicates the matched netconfig buffer.
687 */
688 static struct netconfig *
dup_ncp(ncp)689 dup_ncp(ncp)
690 struct netconfig *ncp;
691 {
692 struct netconfig *p;
693 char *tmp;
694 u_int i;
695
696 if ((tmp=malloc(MAXNETCONFIGLINE)) == NULL)
697 return(NULL);
698 if ((p=(struct netconfig *)malloc(sizeof(struct netconfig))) == NULL) {
699 free(tmp);
700 return(NULL);
701 }
702 /*
703 * First we dup all the data from matched netconfig buffer. Then we
704 * adjust some of the member pointer to a pre-allocated buffer where
705 * contains part of the data.
706 * To follow the convention used in parse_ncp(), we store all the
707 * necessary information in the pre-allocated buffer and let each
708 * of the netconfig char pointer member point to the right address
709 * in the buffer.
710 */
711 *p = *ncp;
712 p->nc_netid = (char *)strcpy(tmp,ncp->nc_netid);
713 tmp = strchr(tmp, 0) + 1;
714 p->nc_protofmly = (char *)strcpy(tmp,ncp->nc_protofmly);
715 tmp = strchr(tmp, 0) + 1;
716 p->nc_proto = (char *)strcpy(tmp,ncp->nc_proto);
717 tmp = strchr(tmp, 0) + 1;
718 p->nc_device = (char *)strcpy(tmp,ncp->nc_device);
719 p->nc_lookups = (char **)malloc((size_t)(p->nc_nlookups+1) * sizeof(char *));
720 if (p->nc_lookups == NULL) {
721 free(p->nc_netid);
722 return(NULL);
723 }
724 for (i=0; i < p->nc_nlookups; i++) {
725 tmp = strchr(tmp, 0) + 1;
726 p->nc_lookups[i] = (char *)strcpy(tmp,ncp->nc_lookups[i]);
727 }
728 return(p);
729 }
730