libnl  1.1
addr.c
1 /*
2  * lib/addr.c Abstract Address
3  *
4  * This library is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation version 2.1
7  * of the License.
8  *
9  * Copyright (c) 2003-2006 Thomas Graf <tgraf@suug.ch>
10  */
11 
12 /**
13  * @ingroup utils
14  * @defgroup addr Abstract Address
15  *
16  * @par 1) Transform character string to abstract address
17  * @code
18  * struct nl_addr *a = nl_addr_parse("::1", AF_UNSPEC);
19  * printf("Address family: %s\n", nl_af2str(nl_addr_get_family(a)));
20  * nl_addr_put(a);
21  * a = nl_addr_parse("11:22:33:44:55:66", AF_UNSPEC);
22  * printf("Address family: %s\n", nl_af2str(nl_addr_get_family(a)));
23  * nl_addr_put(a);
24  * @endcode
25  * @{
26  */
27 
28 #include <netlink-local.h>
29 #include <netlink/netlink.h>
30 #include <netlink/utils.h>
31 #include <netlink/addr.h>
32 #include <linux/socket.h>
33 
34 /* All this DECnet stuff is stolen from iproute2, thanks to whoever wrote
35  * this, probably Alexey. */
36 static inline uint16_t dn_ntohs(uint16_t addr)
37 {
38  union {
39  uint8_t byte[2];
40  uint16_t word;
41  } u = {
42  .word = addr,
43  };
44 
45  return ((uint16_t) u.byte[0]) | (((uint16_t) u.byte[1]) << 8);
46 }
47 
48 static inline int do_digit(char *str, uint16_t *addr, uint16_t scale,
49  size_t *pos, size_t len, int *started)
50 {
51  uint16_t tmp = *addr / scale;
52 
53  if (*pos == len)
54  return 1;
55 
56  if (((tmp) > 0) || *started || (scale == 1)) {
57  *str = tmp + '0';
58  *started = 1;
59  (*pos)++;
60  *addr -= (tmp * scale);
61  }
62 
63  return 0;
64 }
65 
66 static const char *dnet_ntop(char *addrbuf, size_t addrlen, char *str,
67  size_t len)
68 {
69  uint16_t addr = dn_ntohs(*(uint16_t *)addrbuf);
70  uint16_t area = addr >> 10;
71  size_t pos = 0;
72  int started = 0;
73 
74  if (addrlen != 2)
75  return NULL;
76 
77  addr &= 0x03ff;
78 
79  if (len == 0)
80  return str;
81 
82  if (do_digit(str + pos, &area, 10, &pos, len, &started))
83  return str;
84 
85  if (do_digit(str + pos, &area, 1, &pos, len, &started))
86  return str;
87 
88  if (pos == len)
89  return str;
90 
91  *(str + pos) = '.';
92  pos++;
93  started = 0;
94 
95  if (do_digit(str + pos, &addr, 1000, &pos, len, &started))
96  return str;
97 
98  if (do_digit(str + pos, &addr, 100, &pos, len, &started))
99  return str;
100 
101  if (do_digit(str + pos, &addr, 10, &pos, len, &started))
102  return str;
103 
104  if (do_digit(str + pos, &addr, 1, &pos, len, &started))
105  return str;
106 
107  if (pos == len)
108  return str;
109 
110  *(str + pos) = 0;
111 
112  return str;
113 }
114 
115 static int dnet_num(const char *src, uint16_t * dst)
116 {
117  int rv = 0;
118  int tmp;
119  *dst = 0;
120 
121  while ((tmp = *src++) != 0) {
122  tmp -= '0';
123  if ((tmp < 0) || (tmp > 9))
124  return rv;
125 
126  rv++;
127  (*dst) *= 10;
128  (*dst) += tmp;
129  }
130 
131  return rv;
132 }
133 
134 static inline int dnet_pton(const char *src, char *addrbuf)
135 {
136  uint16_t area = 0;
137  uint16_t node = 0;
138  int pos;
139 
140  pos = dnet_num(src, &area);
141  if ((pos == 0) || (area > 63) ||
142  ((*(src + pos) != '.') && (*(src + pos) != ',')))
143  return -EINVAL;
144 
145  pos = dnet_num(src + pos + 1, &node);
146  if ((pos == 0) || (node > 1023))
147  return -EINVAL;
148 
149  *(uint16_t *)addrbuf = dn_ntohs((area << 10) | node);
150 
151  return 1;
152 }
153 
154 /**
155  * @name Creating Abstract Addresses
156  * @{
157  */
158 
159 /**
160  * Allocate new abstract address object.
161  * @arg maxsize Maximum size of the binary address.
162  * @return Newly allocated address object or NULL
163  */
164 struct nl_addr *nl_addr_alloc(size_t maxsize)
165 {
166  struct nl_addr *addr;
167 
168  addr = calloc(1, sizeof(*addr) + maxsize);
169  if (!addr) {
170  nl_errno(ENOMEM);
171  return NULL;
172  }
173 
174  addr->a_refcnt = 1;
175  addr->a_maxsize = maxsize;
176 
177  return addr;
178 }
179 
180 /**
181  * Allocate new abstract address object based on a binary address.
182  * @arg family Address family.
183  * @arg buf Buffer containing the binary address.
184  * @arg size Length of binary address buffer.
185  * @return Newly allocated address handle or NULL
186  */
187 struct nl_addr *nl_addr_build(int family, void *buf, size_t size)
188 {
189  struct nl_addr *addr;
190 
191  addr = nl_addr_alloc(size);
192  if (!addr)
193  return NULL;
194 
195  addr->a_family = family;
196  addr->a_len = size;
197  addr->a_prefixlen = size*8;
198 
199  if (size)
200  memcpy(addr->a_addr, buf, size);
201 
202  return addr;
203 }
204 
205 /**
206  * Allocate abstract address object based on a character string
207  * @arg addrstr Address represented as character string.
208  * @arg hint Address family hint or AF_UNSPEC.
209  *
210  * Regognizes the following address formats:
211  *@code
212  * Format Len Family
213  * ----------------------------------------------------------------
214  * IPv6 address format 16 AF_INET6
215  * ddd.ddd.ddd.ddd 4 AF_INET
216  * HH:HH:HH:HH:HH:HH 6 AF_LLC
217  * AA{.|,}NNNN 2 AF_DECnet
218  * HH:HH:HH:... variable AF_UNSPEC
219  * @endcode
220  *
221  * Special values:
222  * - none: All bits and length set to 0.
223  * - {default|all|any}: All bits set to 0, length based on hint or
224  * AF_INET if no hint is given.
225  *
226  * The prefix length may be appened at the end prefixed with a
227  * slash, e.g. 10.0.0.0/8.
228  *
229  * @return Newly allocated abstract address object or NULL.
230  */
231 struct nl_addr *nl_addr_parse(const char *addrstr, int hint)
232 {
233  int err, copy = 0, len = 0, family = AF_UNSPEC;
234  char *str, *prefix, buf[32];
235  struct nl_addr *addr = NULL; /* gcc ain't that smart */
236 
237  str = strdup(addrstr);
238  if (!str) {
239  err = nl_errno(ENOMEM);
240  goto errout;
241  }
242 
243  prefix = strchr(str, '/');
244  if (prefix)
245  *prefix = '\0';
246 
247  if (!strcasecmp(str, "none")) {
248  family = hint;
249  goto prefix;
250  }
251 
252  if (!strcasecmp(str, "default") ||
253  !strcasecmp(str, "all") ||
254  !strcasecmp(str, "any")) {
255 
256  switch (hint) {
257  case AF_INET:
258  case AF_UNSPEC:
259  /* Kind of a hack, we assume that if there is
260  * no hint given the user wants to have a IPv4
261  * address given back. */
262  family = AF_INET;
263  len = 4;
264  goto prefix;
265 
266  case AF_INET6:
267  family = AF_INET6;
268  len = 16;
269  goto prefix;
270 
271  case AF_LLC:
272  family = AF_LLC;
273  len = 6;
274  goto prefix;
275 
276  default:
277  err = nl_error(EINVAL, "Unsuported address" \
278  "family for default address");
279  goto errout;
280  }
281  }
282 
283  copy = 1;
284 
285  if (hint == AF_INET || hint == AF_UNSPEC) {
286  if (inet_pton(AF_INET, str, buf) > 0) {
287  family = AF_INET;
288  len = 4;
289  goto prefix;
290  }
291  if (hint == AF_INET) {
292  err = nl_error(EINVAL, "Invalid IPv4 address");
293  goto errout;
294  }
295  }
296 
297  if (hint == AF_INET6 || hint == AF_UNSPEC) {
298  if (inet_pton(AF_INET6, str, buf) > 0) {
299  family = AF_INET6;
300  len = 16;
301  goto prefix;
302  }
303  if (hint == AF_INET6) {
304  err = nl_error(EINVAL, "Invalid IPv6 address");
305  goto errout;
306  }
307  }
308 
309  if ((hint == AF_LLC || hint == AF_UNSPEC) && strchr(str, ':')) {
310  unsigned int a, b, c, d, e, f;
311 
312  if (sscanf(str, "%02x:%02x:%02x:%02x:%02x:%02x",
313  &a, &b, &c, &d, &e, &f) == 6) {
314  family = AF_LLC;
315  len = 6;
316  buf[0] = (unsigned char) a;
317  buf[1] = (unsigned char) b;
318  buf[2] = (unsigned char) c;
319  buf[3] = (unsigned char) d;
320  buf[4] = (unsigned char) e;
321  buf[5] = (unsigned char) f;
322  goto prefix;
323  }
324 
325  if (hint == AF_LLC) {
326  err = nl_error(EINVAL, "Invalid link layer address");
327  goto errout;
328  }
329  }
330 
331  if ((hint == AF_DECnet || hint == AF_UNSPEC) &&
332  (strchr(str, '.') || strchr(str, ','))) {
333  if (dnet_pton(str, buf) > 0) {
334  family = AF_DECnet;
335  len = 2;
336  goto prefix;
337  }
338  if (hint == AF_DECnet) {
339  err = nl_error(EINVAL, "Invalid DECnet address");
340  goto errout;
341  }
342  }
343 
344  if (hint == AF_UNSPEC && strchr(str, ':')) {
345  int i = 0;
346  char *s = str, *p;
347  for (;;) {
348  long l = strtol(s, &p, 16);
349 
350  if (s == p || l > 0xff || i >= sizeof(buf)) {
351  err = -EINVAL;
352  goto errout;
353  }
354 
355  buf[i++] = (unsigned char) l;
356  if (*p == '\0')
357  break;
358  s = ++p;
359  }
360 
361  len = i;
362  family = AF_UNSPEC;
363  goto prefix;
364  }
365 
366  err = nl_error(EINVAL, "Invalid address");
367  goto errout;
368 
369 prefix:
370  addr = nl_addr_alloc(len);
371  if (!addr) {
372  err = nl_errno(ENOMEM);
373  goto errout;
374  }
375 
376  nl_addr_set_family(addr, family);
377 
378  if (copy)
379  nl_addr_set_binary_addr(addr, buf, len);
380 
381  if (prefix) {
382  char *p;
383  long pl = strtol(++prefix, &p, 0);
384  if (p == prefix) {
385  nl_addr_destroy(addr);
386  err = -EINVAL;
387  goto errout;
388  }
389  nl_addr_set_prefixlen(addr, pl);
390  } else
391  nl_addr_set_prefixlen(addr, len * 8);
392 
393  err = 0;
394 errout:
395  free(str);
396 
397  return err ? NULL : addr;
398 }
399 
400 /**
401  * Clone existing abstract address object.
402  * @arg addr Abstract address object.
403  * @return Newly allocated abstract address object being a duplicate of the
404  * specified address object or NULL if a failure occured.
405  */
406 struct nl_addr *nl_addr_clone(struct nl_addr *addr)
407 {
408  struct nl_addr *new;
409 
410  new = nl_addr_build(addr->a_family, addr->a_addr, addr->a_len);
411  if (new)
412  new->a_prefixlen = addr->a_prefixlen;
413 
414  return new;
415 }
416 
417 /** @} */
418 
419 /**
420  * @name Destroying Abstract Addresses
421  * @{
422  */
423 
424 /**
425  * Destroy abstract address object.
426  * @arg addr Abstract address object.
427  */
428 void nl_addr_destroy(struct nl_addr *addr)
429 {
430  if (!addr)
431  return;
432 
433  if (addr->a_refcnt != 1)
434  BUG();
435 
436  free(addr);
437 }
438 
439 /** @} */
440 
441 /**
442  * @name Managing Usage References
443  * @{
444  */
445 
446 struct nl_addr *nl_addr_get(struct nl_addr *addr)
447 {
448  addr->a_refcnt++;
449 
450  return addr;
451 }
452 
453 void nl_addr_put(struct nl_addr *addr)
454 {
455  if (!addr)
456  return;
457 
458  if (addr->a_refcnt == 1)
459  nl_addr_destroy(addr);
460  else
461  addr->a_refcnt--;
462 }
463 
464 /**
465  * Check whether an abstract address object is shared.
466  * @arg addr Abstract address object.
467  * @return Non-zero if the abstract address object is shared, otherwise 0.
468  */
469 int nl_addr_shared(struct nl_addr *addr)
470 {
471  return addr->a_refcnt > 1;
472 }
473 
474 /** @} */
475 
476 /**
477  * @name Miscellaneous
478  * @{
479  */
480 
481 /**
482  * Compares two abstract address objects.
483  * @arg a A abstract address object.
484  * @arg b Another abstract address object.
485  *
486  * @return Integer less than, equal to or greather than zero if \c is found,
487  * respectively to be less than, to, or be greater than \c b.
488  */
489 int nl_addr_cmp(struct nl_addr *a, struct nl_addr *b)
490 {
491  int d = a->a_family - b->a_family;
492 
493  if (d == 0) {
494  d = a->a_len - b->a_len;
495 
496  if (a->a_len && d == 0)
497  return memcmp(a->a_addr, b->a_addr, a->a_len);
498  }
499 
500  return d;
501 }
502 
503 /**
504  * Compares the prefix of two abstract address objects.
505  * @arg a A abstract address object.
506  * @arg b Another abstract address object.
507  *
508  * @return Integer less than, equal to or greather than zero if \c is found,
509  * respectively to be less than, to, or be greater than \c b.
510  */
511 int nl_addr_cmp_prefix(struct nl_addr *a, struct nl_addr *b)
512 {
513  int d = a->a_family - b->a_family;
514 
515  if (d == 0) {
516  int len = min(a->a_prefixlen, b->a_prefixlen);
517  int bytes = len / 8;
518 
519  d = memcmp(a->a_addr, b->a_addr, bytes);
520  if (d == 0) {
521  int mask = (1UL << (len % 8)) - 1UL;
522 
523  d = (a->a_addr[bytes] & mask) -
524  (b->a_addr[bytes] & mask);
525  }
526  }
527 
528  return d;
529 }
530 
531 /**
532  * Returns true if the address consists of all zeros
533  * @arg addr Address to look at.
534  */
535 int nl_addr_iszero(struct nl_addr *addr)
536 {
537  int i;
538 
539  for (i = 0; i < addr->a_len; i++)
540  if (addr->a_addr[i])
541  return 0;
542 
543  return 1;
544 }
545 
546 /**
547  * Check if an address matches a certain family.
548  * @arg addr Address represented as character string.
549  * @arg family Desired address family.
550  *
551  * @return 1 if the address is of the desired address family,
552  * otherwise 0 is returned.
553  */
554 int nl_addr_valid(char *addr, int family)
555 {
556  int ret;
557  char buf[32];
558 
559  switch (family) {
560  case AF_INET:
561  case AF_INET6:
562  ret = inet_pton(family, addr, buf);
563  if (ret <= 0)
564  return 0;
565  break;
566 
567  case AF_DECnet:
568  ret = dnet_pton(addr, buf);
569  if (ret <= 0)
570  return 0;
571  break;
572 
573  case AF_LLC:
574  if (sscanf(addr, "%*02x:%*02x:%*02x:%*02x:%*02x:%*02x") != 6)
575  return 0;
576  break;
577  }
578 
579  return 1;
580 }
581 
582 /**
583  * Guess address family of an abstract address object based on address size.
584  * @arg addr Abstract address object.
585  * @return Address family or AF_UNSPEC if guessing wasn't successful.
586  */
587 int nl_addr_guess_family(struct nl_addr *addr)
588 {
589  switch (addr->a_len) {
590  case 4:
591  return AF_INET;
592  case 6:
593  return AF_LLC;
594  case 16:
595  return AF_INET6;
596  default:
597  return AF_UNSPEC;
598  }
599 }
600 
601 /**
602  * Fill out sockaddr structure with values from abstract address object.
603  * @arg addr Abstract address object.
604  * @arg sa Destination sockaddr structure buffer.
605  * @arg salen Length of sockaddr structure buffer.
606  *
607  * Fills out the specified sockaddr structure with the data found in the
608  * specified abstract address. The salen argument needs to be set to the
609  * size of sa but will be modified to the actual size used during before
610  * the function exits.
611  *
612  * @return 0 on success or a negative error code
613  */
614 int nl_addr_fill_sockaddr(struct nl_addr *addr, struct sockaddr *sa,
615  socklen_t *salen)
616 {
617  switch (addr->a_family) {
618  case AF_INET: {
619  struct sockaddr_in *sai = (struct sockaddr_in *) sa;
620 
621  if (*salen < sizeof(*sai))
622  return -EINVAL;
623 
624  sai->sin_family = addr->a_family;
625  memcpy(&sai->sin_addr, addr->a_addr, 4);
626  *salen = sizeof(*sai);
627  }
628  break;
629 
630  case AF_INET6: {
631  struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) sa;
632 
633  if (*salen < sizeof(*sa6))
634  return -EINVAL;
635 
636  sa6->sin6_family = addr->a_family;
637  memcpy(&sa6->sin6_addr, addr->a_addr, 16);
638  *salen = sizeof(*sa6);
639  }
640  break;
641 
642  default:
643  return -EINVAL;
644  }
645 
646  return 0;
647 }
648 
649 
650 /** @} */
651 
652 /**
653  * @name Getting Information About Addresses
654  * @{
655  */
656 
657 /**
658  * Call getaddrinfo() for an abstract address object.
659  * @arg addr Abstract address object.
660  *
661  * Calls getaddrinfo() for the specified abstract address in AI_NUMERICHOST
662  * mode.
663  *
664  * @note The caller is responsible for freeing the linked list using the
665  * interface provided by getaddrinfo(3).
666  *
667  * @return A linked list of addrinfo handles or NULL with an error message
668  * associated.
669  */
670 struct addrinfo *nl_addr_info(struct nl_addr *addr)
671 {
672  int err;
673  struct addrinfo *res;
674  char buf[INET6_ADDRSTRLEN+5];
675  struct addrinfo hint = {
676  .ai_flags = AI_NUMERICHOST,
677  .ai_family = addr->a_family,
678  };
679 
680  nl_addr2str(addr, buf, sizeof(buf));
681 
682  err = getaddrinfo(buf, NULL, &hint, &res);
683  if (err != 0) {
684  nl_error(err, gai_strerror(err));
685  return NULL;
686  }
687 
688  return res;
689 }
690 
691 /**
692  * Resolve abstract address object to a name using getnameinfo().
693  * @arg addr Abstract address object.
694  * @arg host Destination buffer for host name.
695  * @arg hostlen Length of destination buffer.
696  *
697  * Resolves the abstract address to a name and writes the looked up result
698  * into the host buffer. getnameinfo() is used to perform the lookup and
699  * is put into NI_NAMEREQD mode so the function will fail if the lookup
700  * couldn't be performed.
701  *
702  * @return 0 on success or a negative error code.
703  */
704 int nl_addr_resolve(struct nl_addr *addr, char *host, size_t hostlen)
705 {
706  int err;
707  struct sockaddr_in6 buf;
708  socklen_t salen = sizeof(buf);
709 
710  err = nl_addr_fill_sockaddr(addr, (struct sockaddr *) &buf, &salen);
711  if (err < 0)
712  return err;
713 
714  return getnameinfo((struct sockaddr *) &buf, salen,
715  host, hostlen, NULL, 0, NI_NAMEREQD);
716 }
717 
718 /** @} */
719 
720 /**
721  * @name Attributes
722  * @{
723  */
724 
725 void nl_addr_set_family(struct nl_addr *addr, int family)
726 {
727  addr->a_family = family;
728 }
729 
730 int nl_addr_get_family(struct nl_addr *addr)
731 {
732  return addr->a_family;
733 }
734 
735 /**
736  * Set binary address of abstract address object.
737  * @arg addr Abstract address object.
738  * @arg buf Buffer containing binary address.
739  * @arg len Length of buffer containing binary address.
740  */
741 int nl_addr_set_binary_addr(struct nl_addr *addr, void *buf, size_t len)
742 {
743  if (len > addr->a_maxsize)
744  return -ERANGE;
745 
746  addr->a_len = len;
747  memcpy(addr->a_addr, buf, len);
748 
749  return 0;
750 }
751 
752 /**
753  * Get binary address of abstract address object.
754  * @arg addr Abstract address object.
755  */
756 void *nl_addr_get_binary_addr(struct nl_addr *addr)
757 {
758  return addr->a_addr;
759 }
760 
761 /**
762  * Get length of binary address of abstract address object.
763  * @arg addr Abstract address object.
764  */
765 unsigned int nl_addr_get_len(struct nl_addr *addr)
766 {
767  return addr->a_len;
768 }
769 
770 void nl_addr_set_prefixlen(struct nl_addr *addr, int prefixlen)
771 {
772  addr->a_prefixlen = prefixlen;
773 }
774 
775 /**
776  * Get prefix length of abstract address object.
777  * @arg addr Abstract address object.
778  */
779 unsigned int nl_addr_get_prefixlen(struct nl_addr *addr)
780 {
781  return addr->a_prefixlen;
782 }
783 
784 /** @} */
785 
786 /**
787  * @name Translations to Strings
788  * @{
789  */
790 
791 /**
792  * Convert abstract address object to character string.
793  * @arg addr Abstract address object.
794  * @arg buf Destination buffer.
795  * @arg size Size of destination buffer.
796  *
797  * Converts an abstract address to a character string and stores
798  * the result in the specified destination buffer.
799  *
800  * @return Address represented in ASCII stored in destination buffer.
801  */
802 char *nl_addr2str(struct nl_addr *addr, char *buf, size_t size)
803 {
804  int i;
805  char tmp[16];
806 
807  if (!addr->a_len) {
808  snprintf(buf, size, "none");
809  goto prefix;
810  }
811 
812  switch (addr->a_family) {
813  case AF_INET:
814  inet_ntop(AF_INET, addr->a_addr, buf, size);
815  break;
816 
817  case AF_INET6:
818  inet_ntop(AF_INET6, addr->a_addr, buf, size);
819  break;
820 
821  case AF_DECnet:
822  dnet_ntop(addr->a_addr, addr->a_len, buf, size);
823  break;
824 
825  case AF_LLC:
826  default:
827  snprintf(buf, size, "%02x",
828  (unsigned char) addr->a_addr[0]);
829  for (i = 1; i < addr->a_len; i++) {
830  snprintf(tmp, sizeof(tmp), ":%02x",
831  (unsigned char) addr->a_addr[i]);
832  strncat(buf, tmp, size - strlen(buf) - 1);
833  }
834  break;
835  }
836 
837 prefix:
838  if (addr->a_prefixlen != (8 * addr->a_len)) {
839  snprintf(tmp, sizeof(tmp), "/%u", addr->a_prefixlen);
840  strncat(buf, tmp, size - strlen(buf) - 1);
841  }
842 
843  return buf;
844 }
845 
846 /** @} */
847 
848 /**
849  * @name Address Family Transformations
850  * @{
851  */
852 
853 static struct trans_tbl afs[] = {
854  __ADD(AF_UNSPEC,unspec)
855  __ADD(AF_UNIX,unix)
856  __ADD(AF_LOCAL,local)
857  __ADD(AF_INET,inet)
858  __ADD(AF_AX25,ax25)
859  __ADD(AF_IPX,ipx)
860  __ADD(AF_APPLETALK,appletalk)
861  __ADD(AF_NETROM,netrom)
862  __ADD(AF_BRIDGE,bridge)
863  __ADD(AF_ATMPVC,atmpvc)
864  __ADD(AF_X25,x25)
865  __ADD(AF_INET6,inet6)
866  __ADD(AF_ROSE,rose)
867  __ADD(AF_DECnet,decnet)
868  __ADD(AF_NETBEUI,netbeui)
869  __ADD(AF_SECURITY,security)
870  __ADD(AF_KEY,key)
871  __ADD(AF_NETLINK,netlink)
872  __ADD(AF_ROUTE,route)
873  __ADD(AF_PACKET,packet)
874  __ADD(AF_ASH,ash)
875  __ADD(AF_ECONET,econet)
876  __ADD(AF_ATMSVC,atmsvc)
877  __ADD(AF_SNA,sna)
878  __ADD(AF_IRDA,irda)
879  __ADD(AF_PPPOX,pppox)
880  __ADD(AF_WANPIPE,wanpipe)
881  __ADD(AF_LLC,llc)
882  __ADD(AF_BLUETOOTH,bluetooth)
883 };
884 
885 char *nl_af2str(int family, char *buf, size_t size)
886 {
887  return __type2str(family, buf, size, afs, ARRAY_SIZE(afs));
888 }
889 
890 int nl_str2af(const char *name)
891 {
892  int fam = __str2type(name, afs, ARRAY_SIZE(afs));
893  return fam >= 0 ? fam : AF_UNSPEC;
894 }
895 
896 /** @} */
897 
898 /** @} */
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