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/*
* Copyright (c) 1997-1999 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "krb5_locl.h"
RCSID("$Id: addr_families.c,v 1.24 2000/07/08 13:05:43 joda Exp $");
struct addr_operations {
int af;
krb5_address_type atype;
size_t max_sockaddr_size;
krb5_error_code (*sockaddr2addr)(const struct sockaddr *, krb5_address *);
krb5_error_code (*sockaddr2port)(const struct sockaddr *, int16_t *);
void (*addr2sockaddr)(const krb5_address *, struct sockaddr *,
int *sa_size, int port);
void (*h_addr2sockaddr)(const char *, struct sockaddr *, int *, int);
krb5_error_code (*h_addr2addr)(const char *, krb5_address *);
krb5_boolean (*uninteresting)(const struct sockaddr *);
void (*anyaddr)(struct sockaddr *, int *, int);
int (*print_addr)(const krb5_address *, char *, size_t);
int (*parse_addr)(const char*, krb5_address *);
};
/*
* AF_INET - aka IPv4 implementation
*/
static krb5_error_code
ipv4_sockaddr2addr (const struct sockaddr *sa, krb5_address *a)
{
const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
unsigned char buf[4];
a->addr_type = KRB5_ADDRESS_INET;
memcpy (buf, &sin->sin_addr, 4);
return krb5_data_copy(&a->address, buf, 4);
}
static krb5_error_code
ipv4_sockaddr2port (const struct sockaddr *sa, int16_t *port)
{
const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
*port = sin->sin_port;
return 0;
}
static void
ipv4_addr2sockaddr (const krb5_address *a,
struct sockaddr *sa,
int *sa_size,
int port)
{
struct sockaddr_in *sin = (struct sockaddr_in *)sa;
memset (sin, 0, sizeof(*sin));
sin->sin_family = AF_INET;
memcpy (&sin->sin_addr, a->address.data, 4);
sin->sin_port = port;
*sa_size = sizeof(*sin);
}
static void
ipv4_h_addr2sockaddr(const char *addr,
struct sockaddr *sa, int *sa_size, int port)
{
struct sockaddr_in *sin = (struct sockaddr_in *)sa;
memset (sin, 0, sizeof(*sin));
*sa_size = sizeof(*sin);
sin->sin_family = AF_INET;
sin->sin_port = port;
sin->sin_addr = *((const struct in_addr *)addr);
}
static krb5_error_code
ipv4_h_addr2addr (const char *addr,
krb5_address *a)
{
unsigned char buf[4];
a->addr_type = KRB5_ADDRESS_INET;
memcpy(buf, addr, 4);
return krb5_data_copy(&a->address, buf, 4);
}
/*
* Are there any addresses that should be considered `uninteresting'?
*/
static krb5_boolean
ipv4_uninteresting (const struct sockaddr *sa)
{
const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
if (sin->sin_addr.s_addr == INADDR_ANY)
return TRUE;
return FALSE;
}
static void
ipv4_anyaddr (struct sockaddr *sa, int *sa_size, int port)
{
struct sockaddr_in *sin = (struct sockaddr_in *)sa;
memset (sin, 0, sizeof(*sin));
*sa_size = sizeof(*sin);
sin->sin_family = AF_INET;
sin->sin_port = port;
sin->sin_addr.s_addr = INADDR_ANY;
}
static int
ipv4_print_addr (const krb5_address *addr, char *str, size_t len)
{
struct in_addr ia;
memcpy (&ia, addr->address.data, 4);
return snprintf (str, len, "IPv4:%s", inet_ntoa(ia));
}
static int
ipv4_parse_addr (const char *address, krb5_address *addr)
{
const char *p;
struct in_addr a;
p = strchr(address, ':');
if(p) {
p++;
if(strncasecmp(address, "ip:", p - address) != 0 &&
strncasecmp(address, "ip4:", p - address) != 0 &&
strncasecmp(address, "ipv4:", p - address) != 0 &&
strncasecmp(address, "inet:", p - address) != 0)
return -1;
} else
p = address;
#ifdef HAVE_INET_ATON
if(inet_aton(p, &a) == 0)
return -1;
#elif defined(HAVE_INET_ADDR)
a.s_addr = inet_addr(p);
if(a.s_addr == INADDR_NONE)
return -1;
#else
return -1;
#endif
addr->addr_type = KRB5_ADDRESS_INET;
if(krb5_data_alloc(&addr->address, 4) != 0)
return -1;
_krb5_put_int(addr->address.data, ntohl(a.s_addr), addr->address.length);
return 0;
}
/*
* AF_INET6 - aka IPv6 implementation
*/
#ifdef HAVE_IPV6
static krb5_error_code
ipv6_sockaddr2addr (const struct sockaddr *sa, krb5_address *a)
{
const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)sa;
if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
unsigned char buf[4];
a->addr_type = KRB5_ADDRESS_INET;
#ifndef IN6_ADDR_V6_TO_V4
#ifdef IN6_EXTRACT_V4ADDR
#define IN6_ADDR_V6_TO_V4(x) (&IN6_EXTRACT_V4ADDR(x))
#else
#define IN6_ADDR_V6_TO_V4(x) ((const struct in_addr *)&(x)->s6_addr[12])
#endif
#endif
memcpy (buf, IN6_ADDR_V6_TO_V4(&sin6->sin6_addr), 4);
return krb5_data_copy(&a->address, buf, 4);
} else {
a->addr_type = KRB5_ADDRESS_INET6;
return krb5_data_copy(&a->address,
&sin6->sin6_addr,
sizeof(sin6->sin6_addr));
}
}
static krb5_error_code
ipv6_sockaddr2port (const struct sockaddr *sa, int16_t *port)
{
const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)sa;
*port = sin6->sin6_port;
return 0;
}
static void
ipv6_addr2sockaddr (const krb5_address *a,
struct sockaddr *sa,
int *sa_size,
int port)
{
struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
memset (sin6, 0, sizeof(*sin6));
sin6->sin6_family = AF_INET6;
memcpy (&sin6->sin6_addr, a->address.data, sizeof(sin6->sin6_addr));
sin6->sin6_port = port;
*sa_size = sizeof(*sin6);
}
static void
ipv6_h_addr2sockaddr(const char *addr,
struct sockaddr *sa,
int *sa_size,
int port)
{
struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
memset (sin6, 0, sizeof(*sin6));
*sa_size = sizeof(*sin6);
sin6->sin6_family = AF_INET6;
sin6->sin6_port = port;
sin6->sin6_addr = *((const struct in6_addr *)addr);
}
static krb5_error_code
ipv6_h_addr2addr (const char *addr,
krb5_address *a)
{
a->addr_type = KRB5_ADDRESS_INET6;
return krb5_data_copy(&a->address, addr, sizeof(struct in6_addr));
}
/*
*
*/
static krb5_boolean
ipv6_uninteresting (const struct sockaddr *sa)
{
const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)sa;
const struct in6_addr *in6 = (const struct in6_addr *)&sin6->sin6_addr;
return
IN6_IS_ADDR_LINKLOCAL(in6)
|| IN6_IS_ADDR_V4COMPAT(in6);
}
static void
ipv6_anyaddr (struct sockaddr *sa, int *sa_size, int port)
{
struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
memset (sin6, 0, sizeof(*sin6));
*sa_size = sizeof(*sin6);
sin6->sin6_family = AF_INET6;
sin6->sin6_port = port;
sin6->sin6_addr = in6addr_any;
}
static int
ipv6_print_addr (const krb5_address *addr, char *str, size_t len)
{
char buf[128], buf2[3];
#ifdef HAVE_INET_NTOP
if(inet_ntop(AF_INET6, addr->address.data, buf, sizeof(buf)) == NULL)
#endif
{
/* XXX this is pretty ugly, but better than abort() */
int i;
unsigned char *p = addr->address.data;
buf[0] = '\0';
for(i = 0; i < addr->address.length; i++) {
snprintf(buf2, sizeof(buf2), "%02x", p[i]);
if(i > 0 && (i & 1) == 0)
strlcat(buf, ":", sizeof(buf));
strlcat(buf, buf2, sizeof(buf));
}
}
return snprintf(str, len, "IPv6:%s", buf);
}
static int
ipv6_parse_addr (const char *address, krb5_address *addr)
{
int ret;
struct in6_addr in6;
ret = inet_pton(AF_INET6, address, &in6.s6_addr);
if(ret == 1) {
addr->addr_type = KRB5_ADDRESS_INET6;
ret = krb5_data_alloc(&addr->address, sizeof(in6.s6_addr));
if (ret)
return -1;
memcpy(addr->address.data, in6.s6_addr, sizeof(in6.s6_addr));
return 0;
}
return -1;
}
#endif /* IPv6 */
/*
* table
*/
static struct addr_operations at[] = {
{AF_INET, KRB5_ADDRESS_INET, sizeof(struct sockaddr_in),
ipv4_sockaddr2addr,
ipv4_sockaddr2port,
ipv4_addr2sockaddr,
ipv4_h_addr2sockaddr,
ipv4_h_addr2addr,
ipv4_uninteresting, ipv4_anyaddr, ipv4_print_addr, ipv4_parse_addr},
#ifdef HAVE_IPV6
{AF_INET6, KRB5_ADDRESS_INET6, sizeof(struct sockaddr_in6),
ipv6_sockaddr2addr,
ipv6_sockaddr2port,
ipv6_addr2sockaddr,
ipv6_h_addr2sockaddr,
ipv6_h_addr2addr,
ipv6_uninteresting, ipv6_anyaddr, ipv6_print_addr, ipv6_parse_addr}
#endif
};
static int num_addrs = sizeof(at) / sizeof(at[0]);
static size_t max_sockaddr_size = 0;
/*
* generic functions
*/
static struct addr_operations *
find_af(int af)
{
struct addr_operations *a;
for (a = at; a < at + num_addrs; ++a)
if (af == a->af)
return a;
return NULL;
}
static struct addr_operations *
find_atype(int atype)
{
struct addr_operations *a;
for (a = at; a < at + num_addrs; ++a)
if (atype == a->atype)
return a;
return NULL;
}
krb5_error_code
krb5_sockaddr2address (const struct sockaddr *sa, krb5_address *addr)
{
struct addr_operations *a = find_af(sa->sa_family);
if (a == NULL)
return KRB5_PROG_ATYPE_NOSUPP;
return (*a->sockaddr2addr)(sa, addr);
}
krb5_error_code
krb5_sockaddr2port (const struct sockaddr *sa, int16_t *port)
{
struct addr_operations *a = find_af(sa->sa_family);
if (a == NULL)
return KRB5_PROG_ATYPE_NOSUPP;
return (*a->sockaddr2port)(sa, port);
}
krb5_error_code
krb5_addr2sockaddr (const krb5_address *addr,
struct sockaddr *sa,
int *sa_size,
int port)
{
struct addr_operations *a = find_atype(addr->addr_type);
if (a == NULL)
return KRB5_PROG_ATYPE_NOSUPP;
(*a->addr2sockaddr)(addr, sa, sa_size, port);
return 0;
}
size_t
krb5_max_sockaddr_size (void)
{
if (max_sockaddr_size == 0) {
struct addr_operations *a;
for(a = at; a < at + num_addrs; ++a)
max_sockaddr_size = max(max_sockaddr_size, a->max_sockaddr_size);
}
return max_sockaddr_size;
}
krb5_boolean
krb5_sockaddr_uninteresting(const struct sockaddr *sa)
{
struct addr_operations *a = find_af(sa->sa_family);
if (a == NULL)
return TRUE;
return (*a->uninteresting)(sa);
}
krb5_error_code
krb5_h_addr2sockaddr (int af,
const char *addr, struct sockaddr *sa, int *sa_size,
int port)
{
struct addr_operations *a = find_af(af);
if (a == NULL)
return KRB5_PROG_ATYPE_NOSUPP;
(*a->h_addr2sockaddr)(addr, sa, sa_size, port);
return 0;
}
krb5_error_code
krb5_h_addr2addr (int af,
const char *haddr, krb5_address *addr)
{
struct addr_operations *a = find_af(af);
if (a == NULL)
return KRB5_PROG_ATYPE_NOSUPP;
return (*a->h_addr2addr)(haddr, addr);
}
krb5_error_code
krb5_anyaddr (int af,
struct sockaddr *sa,
int *sa_size,
int port)
{
struct addr_operations *a = find_af (af);
if (a == NULL)
return KRB5_PROG_ATYPE_NOSUPP;
(*a->anyaddr)(sa, sa_size, port);
return 0;
}
krb5_error_code
krb5_print_address (const krb5_address *addr,
char *str, size_t len, size_t *ret_len)
{
struct addr_operations *a = find_atype(addr->addr_type);
if (a == NULL) {
char *s;
size_t l;
int i;
s = str;
l = snprintf(s, len, "TYPE_%d:", addr->addr_type);
s += l;
len -= len;
for(i = 0; i < addr->address.length; i++) {
l = snprintf(s, len, "%02x", ((char*)addr->address.data)[i]);
len -= l;
s += l;
}
*ret_len = s - str;
return 0;
}
*ret_len = (*a->print_addr)(addr, str, len);
return 0;
}
krb5_error_code
krb5_parse_address(krb5_context context,
const char *string,
krb5_addresses *addresses)
{
int i, n;
struct addrinfo *ai, *a;
int error;
for(i = 0; i < num_addrs; i++) {
if(at[i].parse_addr) {
krb5_address a;
if((*at[i].parse_addr)(string, &a) == 0) {
ALLOC_SEQ(addresses, 1);
addresses->val[0] = a;
return 0;
}
}
}
error = getaddrinfo (string, NULL, NULL, &ai);
if (error)
return krb5_eai_to_heim_errno(error);
n = 0;
for (a = ai; a != NULL; a = a->ai_next)
++n;
ALLOC_SEQ(addresses, n);
for (a = ai, i = 0; a != NULL; a = a->ai_next, ++i) {
krb5_sockaddr2address (ai->ai_addr, &addresses->val[i]);
}
freeaddrinfo (ai);
return 0;
}
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