2 * Copyright (c) 1997-2001 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
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34 #include "krb5_locl.h"
36 RCSID("$Id: addr_families.c,v 1.26 2001/05/14 22:49:55 assar Exp $");
38 struct addr_operations {
40 krb5_address_type atype;
41 size_t max_sockaddr_size;
42 krb5_error_code (*sockaddr2addr)(const struct sockaddr *, krb5_address *);
43 krb5_error_code (*sockaddr2port)(const struct sockaddr *, int16_t *);
44 void (*addr2sockaddr)(const krb5_address *, struct sockaddr *,
45 int *sa_size, int port);
46 void (*h_addr2sockaddr)(const char *, struct sockaddr *, int *, int);
47 krb5_error_code (*h_addr2addr)(const char *, krb5_address *);
48 krb5_boolean (*uninteresting)(const struct sockaddr *);
49 void (*anyaddr)(struct sockaddr *, int *, int);
50 int (*print_addr)(const krb5_address *, char *, size_t);
51 int (*parse_addr)(const char*, krb5_address *);
55 * AF_INET - aka IPv4 implementation
58 static krb5_error_code
59 ipv4_sockaddr2addr (const struct sockaddr *sa, krb5_address *a)
61 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
64 a->addr_type = KRB5_ADDRESS_INET;
65 memcpy (buf, &sin->sin_addr, 4);
66 return krb5_data_copy(&a->address, buf, 4);
69 static krb5_error_code
70 ipv4_sockaddr2port (const struct sockaddr *sa, int16_t *port)
72 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
74 *port = sin->sin_port;
79 ipv4_addr2sockaddr (const krb5_address *a,
84 struct sockaddr_in *sin = (struct sockaddr_in *)sa;
86 memset (sin, 0, sizeof(*sin));
87 sin->sin_family = AF_INET;
88 memcpy (&sin->sin_addr, a->address.data, 4);
90 *sa_size = sizeof(*sin);
94 ipv4_h_addr2sockaddr(const char *addr,
95 struct sockaddr *sa, int *sa_size, int port)
97 struct sockaddr_in *sin = (struct sockaddr_in *)sa;
99 memset (sin, 0, sizeof(*sin));
100 *sa_size = sizeof(*sin);
101 sin->sin_family = AF_INET;
102 sin->sin_port = port;
103 sin->sin_addr = *((const struct in_addr *)addr);
106 static krb5_error_code
107 ipv4_h_addr2addr (const char *addr,
110 unsigned char buf[4];
112 a->addr_type = KRB5_ADDRESS_INET;
113 memcpy(buf, addr, 4);
114 return krb5_data_copy(&a->address, buf, 4);
118 * Are there any addresses that should be considered `uninteresting'?
122 ipv4_uninteresting (const struct sockaddr *sa)
124 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
126 if (sin->sin_addr.s_addr == INADDR_ANY)
133 ipv4_anyaddr (struct sockaddr *sa, int *sa_size, int port)
135 struct sockaddr_in *sin = (struct sockaddr_in *)sa;
137 memset (sin, 0, sizeof(*sin));
138 *sa_size = sizeof(*sin);
139 sin->sin_family = AF_INET;
140 sin->sin_port = port;
141 sin->sin_addr.s_addr = INADDR_ANY;
145 ipv4_print_addr (const krb5_address *addr, char *str, size_t len)
149 memcpy (&ia, addr->address.data, 4);
151 return snprintf (str, len, "IPv4:%s", inet_ntoa(ia));
155 ipv4_parse_addr (const char *address, krb5_address *addr)
160 p = strchr(address, ':');
163 if(strncasecmp(address, "ip:", p - address) != 0 &&
164 strncasecmp(address, "ip4:", p - address) != 0 &&
165 strncasecmp(address, "ipv4:", p - address) != 0 &&
166 strncasecmp(address, "inet:", p - address) != 0)
170 #ifdef HAVE_INET_ATON
171 if(inet_aton(p, &a) == 0)
173 #elif defined(HAVE_INET_ADDR)
174 a.s_addr = inet_addr(p);
175 if(a.s_addr == INADDR_NONE)
180 addr->addr_type = KRB5_ADDRESS_INET;
181 if(krb5_data_alloc(&addr->address, 4) != 0)
183 _krb5_put_int(addr->address.data, ntohl(a.s_addr), addr->address.length);
188 * AF_INET6 - aka IPv6 implementation
193 static krb5_error_code
194 ipv6_sockaddr2addr (const struct sockaddr *sa, krb5_address *a)
196 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)sa;
198 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
199 unsigned char buf[4];
201 a->addr_type = KRB5_ADDRESS_INET;
202 #ifndef IN6_ADDR_V6_TO_V4
203 #ifdef IN6_EXTRACT_V4ADDR
204 #define IN6_ADDR_V6_TO_V4(x) (&IN6_EXTRACT_V4ADDR(x))
206 #define IN6_ADDR_V6_TO_V4(x) ((const struct in_addr *)&(x)->s6_addr[12])
209 memcpy (buf, IN6_ADDR_V6_TO_V4(&sin6->sin6_addr), 4);
210 return krb5_data_copy(&a->address, buf, 4);
212 a->addr_type = KRB5_ADDRESS_INET6;
213 return krb5_data_copy(&a->address,
215 sizeof(sin6->sin6_addr));
219 static krb5_error_code
220 ipv6_sockaddr2port (const struct sockaddr *sa, int16_t *port)
222 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)sa;
224 *port = sin6->sin6_port;
229 ipv6_addr2sockaddr (const krb5_address *a,
234 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
236 memset (sin6, 0, sizeof(*sin6));
237 sin6->sin6_family = AF_INET6;
238 memcpy (&sin6->sin6_addr, a->address.data, sizeof(sin6->sin6_addr));
239 sin6->sin6_port = port;
240 *sa_size = sizeof(*sin6);
244 ipv6_h_addr2sockaddr(const char *addr,
249 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
251 memset (sin6, 0, sizeof(*sin6));
252 *sa_size = sizeof(*sin6);
253 sin6->sin6_family = AF_INET6;
254 sin6->sin6_port = port;
255 sin6->sin6_addr = *((const struct in6_addr *)addr);
258 static krb5_error_code
259 ipv6_h_addr2addr (const char *addr,
262 a->addr_type = KRB5_ADDRESS_INET6;
263 return krb5_data_copy(&a->address, addr, sizeof(struct in6_addr));
271 ipv6_uninteresting (const struct sockaddr *sa)
273 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)sa;
274 const struct in6_addr *in6 = (const struct in6_addr *)&sin6->sin6_addr;
277 IN6_IS_ADDR_LINKLOCAL(in6)
278 || IN6_IS_ADDR_V4COMPAT(in6);
282 ipv6_anyaddr (struct sockaddr *sa, int *sa_size, int port)
284 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
286 memset (sin6, 0, sizeof(*sin6));
287 *sa_size = sizeof(*sin6);
288 sin6->sin6_family = AF_INET6;
289 sin6->sin6_port = port;
290 sin6->sin6_addr = in6addr_any;
294 ipv6_print_addr (const krb5_address *addr, char *str, size_t len)
296 char buf[128], buf2[3];
297 #ifdef HAVE_INET_NTOP
298 if(inet_ntop(AF_INET6, addr->address.data, buf, sizeof(buf)) == NULL)
301 /* XXX this is pretty ugly, but better than abort() */
303 unsigned char *p = addr->address.data;
305 for(i = 0; i < addr->address.length; i++) {
306 snprintf(buf2, sizeof(buf2), "%02x", p[i]);
307 if(i > 0 && (i & 1) == 0)
308 strlcat(buf, ":", sizeof(buf));
309 strlcat(buf, buf2, sizeof(buf));
312 return snprintf(str, len, "IPv6:%s", buf);
316 ipv6_parse_addr (const char *address, krb5_address *addr)
321 ret = inet_pton(AF_INET6, address, &in6.s6_addr);
323 addr->addr_type = KRB5_ADDRESS_INET6;
324 ret = krb5_data_alloc(&addr->address, sizeof(in6.s6_addr));
327 memcpy(addr->address.data, in6.s6_addr, sizeof(in6.s6_addr));
339 static struct addr_operations at[] = {
340 {AF_INET, KRB5_ADDRESS_INET, sizeof(struct sockaddr_in),
344 ipv4_h_addr2sockaddr,
346 ipv4_uninteresting, ipv4_anyaddr, ipv4_print_addr, ipv4_parse_addr},
348 {AF_INET6, KRB5_ADDRESS_INET6, sizeof(struct sockaddr_in6),
352 ipv6_h_addr2sockaddr,
354 ipv6_uninteresting, ipv6_anyaddr, ipv6_print_addr, ipv6_parse_addr}
358 static int num_addrs = sizeof(at) / sizeof(at[0]);
360 static size_t max_sockaddr_size = 0;
366 static struct addr_operations *
369 struct addr_operations *a;
371 for (a = at; a < at + num_addrs; ++a)
377 static struct addr_operations *
378 find_atype(int atype)
380 struct addr_operations *a;
382 for (a = at; a < at + num_addrs; ++a)
383 if (atype == a->atype)
389 krb5_sockaddr2address (krb5_context context,
390 const struct sockaddr *sa, krb5_address *addr)
392 struct addr_operations *a = find_af(sa->sa_family);
394 krb5_set_error_string (context, "Address family %d not supported",
396 return KRB5_PROG_ATYPE_NOSUPP;
398 return (*a->sockaddr2addr)(sa, addr);
402 krb5_sockaddr2port (krb5_context context,
403 const struct sockaddr *sa, int16_t *port)
405 struct addr_operations *a = find_af(sa->sa_family);
407 krb5_set_error_string (context, "Address family %d not supported",
409 return KRB5_PROG_ATYPE_NOSUPP;
411 return (*a->sockaddr2port)(sa, port);
415 krb5_addr2sockaddr (krb5_context context,
416 const krb5_address *addr,
421 struct addr_operations *a = find_atype(addr->addr_type);
424 krb5_set_error_string (context, "Address type %d not supported",
426 return KRB5_PROG_ATYPE_NOSUPP;
428 (*a->addr2sockaddr)(addr, sa, sa_size, port);
433 krb5_max_sockaddr_size (void)
435 if (max_sockaddr_size == 0) {
436 struct addr_operations *a;
438 for(a = at; a < at + num_addrs; ++a)
439 max_sockaddr_size = max(max_sockaddr_size, a->max_sockaddr_size);
441 return max_sockaddr_size;
445 krb5_sockaddr_uninteresting(const struct sockaddr *sa)
447 struct addr_operations *a = find_af(sa->sa_family);
450 return (*a->uninteresting)(sa);
454 krb5_h_addr2sockaddr (krb5_context context,
456 const char *addr, struct sockaddr *sa, int *sa_size,
459 struct addr_operations *a = find_af(af);
461 krb5_set_error_string (context, "Address family %d not supported", af);
462 return KRB5_PROG_ATYPE_NOSUPP;
464 (*a->h_addr2sockaddr)(addr, sa, sa_size, port);
469 krb5_h_addr2addr (krb5_context context,
471 const char *haddr, krb5_address *addr)
473 struct addr_operations *a = find_af(af);
475 krb5_set_error_string (context, "Address family %d not supported", af);
476 return KRB5_PROG_ATYPE_NOSUPP;
478 return (*a->h_addr2addr)(haddr, addr);
482 krb5_anyaddr (krb5_context context,
488 struct addr_operations *a = find_af (af);
491 krb5_set_error_string (context, "Address family %d not supported", af);
492 return KRB5_PROG_ATYPE_NOSUPP;
495 (*a->anyaddr)(sa, sa_size, port);
500 krb5_print_address (const krb5_address *addr,
501 char *str, size_t len, size_t *ret_len)
503 struct addr_operations *a = find_atype(addr->addr_type);
510 l = snprintf(s, len, "TYPE_%d:", addr->addr_type);
513 for(i = 0; i < addr->address.length; i++) {
514 l = snprintf(s, len, "%02x", ((char*)addr->address.data)[i]);
521 *ret_len = (*a->print_addr)(addr, str, len);
526 krb5_parse_address(krb5_context context,
528 krb5_addresses *addresses)
531 struct addrinfo *ai, *a;
535 for(i = 0; i < num_addrs; i++) {
536 if(at[i].parse_addr) {
538 if((*at[i].parse_addr)(string, &a) == 0) {
539 ALLOC_SEQ(addresses, 1);
540 addresses->val[0] = a;
546 error = getaddrinfo (string, NULL, NULL, &ai);
549 krb5_set_error_string (context, "%s: %s", string, gai_strerror(error));
550 return krb5_eai_to_heim_errno(error, save_errno);
554 for (a = ai; a != NULL; a = a->ai_next)
557 ALLOC_SEQ(addresses, n);
559 for (a = ai, i = 0; a != NULL; a = a->ai_next, ++i) {
560 krb5_sockaddr2address (context, ai->ai_addr, &addresses->val[i]);