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272a30405fb60cf95b92b4d2d176985e198fb893
heimdal/lib/krb5/addr_families.c
Love Hornquist Astrand f5f9014c90 Warning fixes from Christos Zoulas 
- shadowed variables
- signed/unsigned confusion
- const lossage
- incomplete structure initializations
- unused code
2011-04-29 20:25:05 -07:00

1558 lines
39 KiB
C
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/*
* Copyright (c) 1997-2007 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"
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 *,
krb5_socklen_t *sa_size, int port);
void (*h_addr2sockaddr)(const char *, struct sockaddr *, krb5_socklen_t *, int);
krb5_error_code (*h_addr2addr)(const char *, krb5_address *);
krb5_boolean (*uninteresting)(const struct sockaddr *);
krb5_boolean (*is_loopback)(const struct sockaddr *);
void (*anyaddr)(struct sockaddr *, krb5_socklen_t *, int);
int (*print_addr)(const krb5_address *, char *, size_t);
int (*parse_addr)(krb5_context, const char*, krb5_address *);
int (*order_addr)(krb5_context, const krb5_address*, const krb5_address*);
int (*free_addr)(krb5_context, krb5_address*);
int (*copy_addr)(krb5_context, const krb5_address*, krb5_address*);
int (*mask_boundary)(krb5_context, const krb5_address*, unsigned long,
krb5_address*, krb5_address*);
};
/*
* AF_INET - aka IPv4 implementation
*/
static krb5_error_code
ipv4_sockaddr2addr (const struct sockaddr *sa, krb5_address *a)
{
const struct sockaddr_in *sin4 = (const struct sockaddr_in *)sa;
unsigned char buf[4];
a->addr_type = KRB5_ADDRESS_INET;
memcpy (buf, &sin4->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 *sin4 = (const struct sockaddr_in *)sa;
*port = sin4->sin_port;
return 0;
}
static void
ipv4_addr2sockaddr (const krb5_address *a,
struct sockaddr *sa,
krb5_socklen_t *sa_size,
int port)
{
struct sockaddr_in tmp;
memset (&tmp, 0, sizeof(tmp));
tmp.sin_family = AF_INET;
memcpy (&tmp.sin_addr, a->address.data, 4);
tmp.sin_port = port;
memcpy(sa, &tmp, min(sizeof(tmp), *sa_size));
*sa_size = sizeof(tmp);
}
static void
ipv4_h_addr2sockaddr(const char *addr,
struct sockaddr *sa,
krb5_socklen_t *sa_size,
int port)
{
struct sockaddr_in tmp;
memset (&tmp, 0, sizeof(tmp));
tmp.sin_family = AF_INET;
tmp.sin_port = port;
tmp.sin_addr = *((const struct in_addr *)addr);
memcpy(sa, &tmp, min(sizeof(tmp), *sa_size));
*sa_size = sizeof(tmp);
}
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 *sin4 = (const struct sockaddr_in *)sa;
if (sin4->sin_addr.s_addr == INADDR_ANY)
return TRUE;
return FALSE;
}
static krb5_boolean
ipv4_is_loopback (const struct sockaddr *sa)
{
const struct sockaddr_in *sin4 = (const struct sockaddr_in *)sa;
if ((ntohl(sin4->sin_addr.s_addr) >> 24) == IN_LOOPBACKNET)
return TRUE;
return FALSE;
}
static void
ipv4_anyaddr (struct sockaddr *sa, krb5_socklen_t *sa_size, int port)
{
struct sockaddr_in tmp;
memset (&tmp, 0, sizeof(tmp));
tmp.sin_family = AF_INET;
tmp.sin_port = port;
tmp.sin_addr.s_addr = INADDR_ANY;
memcpy(sa, &tmp, min(sizeof(tmp), *sa_size));
*sa_size = sizeof(tmp);
}
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 (krb5_context context, 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;
if(inet_aton(p, &a) == 0)
return -1;
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;
}
static int
ipv4_mask_boundary(krb5_context context, const krb5_address *inaddr,
unsigned long len, krb5_address *low, krb5_address *high)
{
unsigned long ia;
uint32_t l, h, m = 0xffffffff;
if (len > 32) {
krb5_set_error_message(context, KRB5_PROG_ATYPE_NOSUPP,
N_("IPv4 prefix too large (%ld)", "len"), len);
return KRB5_PROG_ATYPE_NOSUPP;
}
m = m << (32 - len);
_krb5_get_int(inaddr->address.data, &ia, inaddr->address.length);
l = ia & m;
h = l | ~m;
low->addr_type = KRB5_ADDRESS_INET;
if(krb5_data_alloc(&low->address, 4) != 0)
return -1;
_krb5_put_int(low->address.data, l, low->address.length);
high->addr_type = KRB5_ADDRESS_INET;
if(krb5_data_alloc(&high->address, 4) != 0) {
krb5_free_address(context, low);
return -1;
}
_krb5_put_int(high->address.data, h, high->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,
krb5_socklen_t *sa_size,
int port)
{
struct sockaddr_in6 tmp;
memset (&tmp, 0, sizeof(tmp));
tmp.sin6_family = AF_INET6;
memcpy (&tmp.sin6_addr, a->address.data, sizeof(tmp.sin6_addr));
tmp.sin6_port = port;
memcpy(sa, &tmp, min(sizeof(tmp), *sa_size));
*sa_size = sizeof(tmp);
}
static void
ipv6_h_addr2sockaddr(const char *addr,
struct sockaddr *sa,
krb5_socklen_t *sa_size,
int port)
{
struct sockaddr_in6 tmp;
memset (&tmp, 0, sizeof(tmp));
tmp.sin6_family = AF_INET6;
tmp.sin6_port = port;
tmp.sin6_addr = *((const struct in6_addr *)addr);
memcpy(sa, &tmp, min(sizeof(tmp), *sa_size));
*sa_size = sizeof(tmp);
}
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 krb5_boolean
ipv6_is_loopback (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_LOOPBACK(in6));
}
static void
ipv6_anyaddr (struct sockaddr *sa, krb5_socklen_t *sa_size, int port)
{
struct sockaddr_in6 tmp;
memset (&tmp, 0, sizeof(tmp));
tmp.sin6_family = AF_INET6;
tmp.sin6_port = port;
tmp.sin6_addr = in6addr_any;
*sa_size = sizeof(tmp);
}
static int
ipv6_print_addr (const krb5_address *addr, char *str, size_t len)
{
char buf[128], buf2[3];
if(inet_ntop(AF_INET6, addr->address.data, buf, sizeof(buf)) == NULL)
{
/* XXX this is pretty ugly, but better than abort() */
size_t 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 (krb5_context context, const char *address, krb5_address *addr)
{
int ret;
struct in6_addr in6;
const char *p;
p = strchr(address, ':');
if(p) {
p++;
if(strncasecmp(address, "ip6:", p - address) == 0 ||
strncasecmp(address, "ipv6:", p - address) == 0 ||
strncasecmp(address, "inet6:", p - address) == 0)
address = p;
}
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;
}
static int
ipv6_mask_boundary(krb5_context context, const krb5_address *inaddr,
unsigned long len, krb5_address *low, krb5_address *high)
{
struct in6_addr addr, laddr, haddr;
uint32_t m;
int i, sub_len;
if (len > 128) {
krb5_set_error_message(context, KRB5_PROG_ATYPE_NOSUPP,
N_("IPv6 prefix too large (%ld)", "length"), len);
return KRB5_PROG_ATYPE_NOSUPP;
}
if (inaddr->address.length != sizeof(addr)) {
krb5_set_error_message(context, KRB5_PROG_ATYPE_NOSUPP,
N_("IPv6 addr bad length", ""));
return KRB5_PROG_ATYPE_NOSUPP;
}
memcpy(&addr, inaddr->address.data, inaddr->address.length);
for (i = 0; i < 16; i++) {
sub_len = min(8, len);
m = 0xff << (8 - sub_len);
laddr.s6_addr[i] = addr.s6_addr[i] & m;
haddr.s6_addr[i] = (addr.s6_addr[i] & m) | ~m;
if (len > 8)
len -= 8;
else
len = 0;
}
low->addr_type = KRB5_ADDRESS_INET6;
if (krb5_data_alloc(&low->address, sizeof(laddr.s6_addr)) != 0)
return -1;
memcpy(low->address.data, laddr.s6_addr, sizeof(laddr.s6_addr));
high->addr_type = KRB5_ADDRESS_INET6;
if (krb5_data_alloc(&high->address, sizeof(haddr.s6_addr)) != 0) {
krb5_free_address(context, low);
return -1;
}
memcpy(high->address.data, haddr.s6_addr, sizeof(haddr.s6_addr));
return 0;
}
#endif /* IPv6 */
#ifndef HEIMDAL_SMALLER
/*
* table
*/
#define KRB5_ADDRESS_ARANGE (-100)
struct arange {
krb5_address low;
krb5_address high;
};
static int
arange_parse_addr (krb5_context context,
const char *address, krb5_address *addr)
{
char buf[1024], *p;
krb5_address low0, high0;
struct arange *a;
krb5_error_code ret;
if(strncasecmp(address, "RANGE:", 6) != 0)
return -1;
address += 6;
p = strrchr(address, '/');
if (p) {
krb5_addresses addrmask;
char *q;
long num;
if (strlcpy(buf, address, sizeof(buf)) > sizeof(buf))
return -1;
buf[p - address] = '\0';
ret = krb5_parse_address(context, buf, &addrmask);
if (ret)
return ret;
if(addrmask.len != 1) {
krb5_free_addresses(context, &addrmask);
return -1;
}
address += p - address + 1;
num = strtol(address, &q, 10);
if (q == address || *q != '\0' || num < 0) {
krb5_free_addresses(context, &addrmask);
return -1;
}
ret = krb5_address_prefixlen_boundary(context, &addrmask.val[0], num,
&low0, &high0);
krb5_free_addresses(context, &addrmask);
if (ret)
return ret;
} else {
krb5_addresses low, high;
strsep_copy(&address, "-", buf, sizeof(buf));
ret = krb5_parse_address(context, buf, &low);
if(ret)
return ret;
if(low.len != 1) {
krb5_free_addresses(context, &low);
return -1;
}
strsep_copy(&address, "-", buf, sizeof(buf));
ret = krb5_parse_address(context, buf, &high);
if(ret) {
krb5_free_addresses(context, &low);
return ret;
}
if(high.len != 1 && high.val[0].addr_type != low.val[0].addr_type) {
krb5_free_addresses(context, &low);
krb5_free_addresses(context, &high);
return -1;
}
ret = krb5_copy_address(context, &high.val[0], &high0);
if (ret == 0) {
ret = krb5_copy_address(context, &low.val[0], &low0);
if (ret)
krb5_free_address(context, &high0);
}
krb5_free_addresses(context, &low);
krb5_free_addresses(context, &high);
if (ret)
return ret;
}
krb5_data_alloc(&addr->address, sizeof(*a));
addr->addr_type = KRB5_ADDRESS_ARANGE;
a = addr->address.data;
if(krb5_address_order(context, &low0, &high0) < 0) {
a->low = low0;
a->high = high0;
} else {
a->low = high0;
a->high = low0;
}
return 0;
}
static int
arange_free (krb5_context context, krb5_address *addr)
{
struct arange *a;
a = addr->address.data;
krb5_free_address(context, &a->low);
krb5_free_address(context, &a->high);
krb5_data_free(&addr->address);
return 0;
}
static int
arange_copy (krb5_context context, const krb5_address *inaddr,
krb5_address *outaddr)
{
krb5_error_code ret;
struct arange *i, *o;
outaddr->addr_type = KRB5_ADDRESS_ARANGE;
ret = krb5_data_alloc(&outaddr->address, sizeof(*o));
if(ret)
return ret;
i = inaddr->address.data;
o = outaddr->address.data;
ret = krb5_copy_address(context, &i->low, &o->low);
if(ret) {
krb5_data_free(&outaddr->address);
return ret;
}
ret = krb5_copy_address(context, &i->high, &o->high);
if(ret) {
krb5_free_address(context, &o->low);
krb5_data_free(&outaddr->address);
return ret;
}
return 0;
}
static int
arange_print_addr (const krb5_address *addr, char *str, size_t len)
{
struct arange *a;
krb5_error_code ret;
size_t l, size, ret_len;
a = addr->address.data;
l = strlcpy(str, "RANGE:", len);
ret_len = l;
if (l > len)
l = len;
size = l;
ret = krb5_print_address (&a->low, str + size, len - size, &l);
if (ret)
return ret;
ret_len += l;
if (len - size > l)
size += l;
else
size = len;
l = strlcat(str + size, "-", len - size);
ret_len += l;
if (len - size > l)
size += l;
else
size = len;
ret = krb5_print_address (&a->high, str + size, len - size, &l);
if (ret)
return ret;
ret_len += l;
return ret_len;
}
static int
arange_order_addr(krb5_context context,
const krb5_address *addr1,
const krb5_address *addr2)
{
int tmp1, tmp2, sign;
struct arange *a;
const krb5_address *a2;
if(addr1->addr_type == KRB5_ADDRESS_ARANGE) {
a = addr1->address.data;
a2 = addr2;
sign = 1;
} else if(addr2->addr_type == KRB5_ADDRESS_ARANGE) {
a = addr2->address.data;
a2 = addr1;
sign = -1;
} else
abort();
if(a2->addr_type == KRB5_ADDRESS_ARANGE) {
struct arange *b = a2->address.data;
tmp1 = krb5_address_order(context, &a->low, &b->low);
if(tmp1 != 0)
return sign * tmp1;
return sign * krb5_address_order(context, &a->high, &b->high);
} else if(a2->addr_type == a->low.addr_type) {
tmp1 = krb5_address_order(context, &a->low, a2);
if(tmp1 > 0)
return sign;
tmp2 = krb5_address_order(context, &a->high, a2);
if(tmp2 < 0)
return -sign;
return 0;
} else {
return sign * (addr1->addr_type - addr2->addr_type);
}
}
#endif /* HEIMDAL_SMALLER */
static int
addrport_print_addr (const krb5_address *addr, char *str, size_t len)
{
krb5_error_code ret;
krb5_address addr1, addr2;
uint16_t port = 0;
size_t ret_len = 0, l, size = 0;
krb5_storage *sp;
sp = krb5_storage_from_data((krb5_data*)rk_UNCONST(&addr->address));
if (sp == NULL)
return ENOMEM;
/* for totally obscure reasons, these are not in network byteorder */
krb5_storage_set_byteorder(sp, KRB5_STORAGE_BYTEORDER_LE);
krb5_storage_seek(sp, 2, SEEK_CUR); /* skip first two bytes */
krb5_ret_address(sp, &addr1);
krb5_storage_seek(sp, 2, SEEK_CUR); /* skip two bytes */
krb5_ret_address(sp, &addr2);
krb5_storage_free(sp);
if(addr2.addr_type == KRB5_ADDRESS_IPPORT && addr2.address.length == 2) {
unsigned long value;
_krb5_get_int(addr2.address.data, &value, 2);
port = value;
}
l = strlcpy(str, "ADDRPORT:", len);
ret_len += l;
if (len > l)
size += l;
else
size = len;
ret = krb5_print_address(&addr1, str + size, len - size, &l);
if (ret)
return ret;
ret_len += l;
if (len - size > l)
size += l;
else
size = len;
ret = snprintf(str + size, len - size, ",PORT=%u", port);
if (ret < 0)
return EINVAL;
ret_len += ret;
return ret_len;
}
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_is_loopback,
ipv4_anyaddr,
ipv4_print_addr,
ipv4_parse_addr,
NULL,
NULL,
NULL,
ipv4_mask_boundary
},
#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_is_loopback,
ipv6_anyaddr,
ipv6_print_addr,
ipv6_parse_addr,
NULL,
NULL,
NULL,
ipv6_mask_boundary
} ,
#endif
#ifndef HEIMDAL_SMALLER
/* fake address type */
{
KRB5_ADDRESS_ARANGE, KRB5_ADDRESS_ARANGE, sizeof(struct arange),
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
arange_print_addr,
arange_parse_addr,
arange_order_addr,
arange_free,
arange_copy,
NULL
},
#endif
{
KRB5_ADDRESS_ADDRPORT, KRB5_ADDRESS_ADDRPORT, 0,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
addrport_print_addr,
NULL,
NULL,
NULL,
NULL
}
};
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(krb5_address_type atype)
{
struct addr_operations *a;
for (a = at; a < at + num_addrs; ++a)
if (atype == a->atype)
return a;
return NULL;
}
/**
* krb5_sockaddr2address stores a address a "struct sockaddr" sa in
* the krb5_address addr.
*
* @param context a Keberos context
* @param sa a struct sockaddr to extract the address from
* @param addr an Kerberos 5 address to store the address in.
*
* @return Return an error code or 0.
*
* @ingroup krb5_address
*/
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_sockaddr2address (krb5_context context,
const struct sockaddr *sa, krb5_address *addr)
{
struct addr_operations *a = find_af(sa->sa_family);
if (a == NULL) {
krb5_set_error_message (context, KRB5_PROG_ATYPE_NOSUPP,
N_("Address family %d not supported", ""),
sa->sa_family);
return KRB5_PROG_ATYPE_NOSUPP;
}
return (*a->sockaddr2addr)(sa, addr);
}
/**
* krb5_sockaddr2port extracts a port (if possible) from a "struct
* sockaddr.
*
* @param context a Keberos context
* @param sa a struct sockaddr to extract the port from
* @param port a pointer to an int16_t store the port in.
*
* @return Return an error code or 0. Will return
* KRB5_PROG_ATYPE_NOSUPP in case address type is not supported.
*
* @ingroup krb5_address
*/
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_sockaddr2port (krb5_context context,
const struct sockaddr *sa, int16_t *port)
{
struct addr_operations *a = find_af(sa->sa_family);
if (a == NULL) {
krb5_set_error_message (context, KRB5_PROG_ATYPE_NOSUPP,
N_("Address family %d not supported", ""),
sa->sa_family);
return KRB5_PROG_ATYPE_NOSUPP;
}
return (*a->sockaddr2port)(sa, port);
}
/**
* krb5_addr2sockaddr sets the "struct sockaddr sockaddr" from addr
* and port. The argument sa_size should initially contain the size of
* the sa and after the call, it will contain the actual length of the
* address. In case of the sa is too small to fit the whole address,
* the up to *sa_size will be stored, and then *sa_size will be set to
* the required length.
*
* @param context a Keberos context
* @param addr the address to copy the from
* @param sa the struct sockaddr that will be filled in
* @param sa_size pointer to length of sa, and after the call, it will
* contain the actual length of the address.
* @param port set port in sa.
*
* @return Return an error code or 0. Will return
* KRB5_PROG_ATYPE_NOSUPP in case address type is not supported.
*
* @ingroup krb5_address
*/
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_addr2sockaddr (krb5_context context,
const krb5_address *addr,
struct sockaddr *sa,
krb5_socklen_t *sa_size,
int port)
{
struct addr_operations *a = find_atype(addr->addr_type);
if (a == NULL) {
krb5_set_error_message (context, KRB5_PROG_ATYPE_NOSUPP,
N_("Address type %d not supported",
"krb5_address type"),
addr->addr_type);
return KRB5_PROG_ATYPE_NOSUPP;
}
if (a->addr2sockaddr == NULL) {
krb5_set_error_message (context,
KRB5_PROG_ATYPE_NOSUPP,
N_("Can't convert address type %d to sockaddr", ""),
addr->addr_type);
return KRB5_PROG_ATYPE_NOSUPP;
}
(*a->addr2sockaddr)(addr, sa, sa_size, port);
return 0;
}
/**
* krb5_max_sockaddr_size returns the max size of the .Li struct
* sockaddr that the Kerberos library will return.
*
* @return Return an size_t of the maximum struct sockaddr.
*
* @ingroup krb5_address
*/
KRB5_LIB_FUNCTION size_t KRB5_LIB_CALL
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_sockaddr_uninteresting returns TRUE for all .Fa sa that the
* kerberos library thinks are uninteresting. One example are link
* local addresses.
*
* @param sa pointer to struct sockaddr that might be interesting.
*
* @return Return a non zero for uninteresting addresses.
*
* @ingroup krb5_address
*/
KRB5_LIB_FUNCTION krb5_boolean KRB5_LIB_CALL
krb5_sockaddr_uninteresting(const struct sockaddr *sa)
{
struct addr_operations *a = find_af(sa->sa_family);
if (a == NULL || a->uninteresting == NULL)
return TRUE;
return (*a->uninteresting)(sa);
}
KRB5_LIB_FUNCTION krb5_boolean KRB5_LIB_CALL
krb5_sockaddr_is_loopback(const struct sockaddr *sa)
{
struct addr_operations *a = find_af(sa->sa_family);
if (a == NULL || a->is_loopback == NULL)
return TRUE;
return (*a->is_loopback)(sa);
}
/**
* krb5_h_addr2sockaddr initializes a "struct sockaddr sa" from af and
* the "struct hostent" (see gethostbyname(3) ) h_addr_list
* component. The argument sa_size should initially contain the size
* of the sa, and after the call, it will contain the actual length of
* the address.
*
* @param context a Keberos context
* @param af addresses
* @param addr address
* @param sa returned struct sockaddr
* @param sa_size size of sa
* @param port port to set in sa.
*
* @return Return an error code or 0.
*
* @ingroup krb5_address
*/
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_h_addr2sockaddr (krb5_context context,
int af,
const char *addr, struct sockaddr *sa,
krb5_socklen_t *sa_size,
int port)
{
struct addr_operations *a = find_af(af);
if (a == NULL) {
krb5_set_error_message (context, KRB5_PROG_ATYPE_NOSUPP,
"Address family %d not supported", af);
return KRB5_PROG_ATYPE_NOSUPP;
}
(*a->h_addr2sockaddr)(addr, sa, sa_size, port);
return 0;
}
/**
* krb5_h_addr2addr works like krb5_h_addr2sockaddr with the exception
* that it operates on a krb5_address instead of a struct sockaddr.
*
* @param context a Keberos context
* @param af address family
* @param haddr host address from struct hostent.
* @param addr returned krb5_address.
*
* @return Return an error code or 0.
*
* @ingroup krb5_address
*/
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_h_addr2addr (krb5_context context,
int af,
const char *haddr, krb5_address *addr)
{
struct addr_operations *a = find_af(af);
if (a == NULL) {
krb5_set_error_message (context, KRB5_PROG_ATYPE_NOSUPP,
N_("Address family %d not supported", ""), af);
return KRB5_PROG_ATYPE_NOSUPP;
}
return (*a->h_addr2addr)(haddr, addr);
}
/**
* krb5_anyaddr fills in a "struct sockaddr sa" that can be used to
* bind(2) to. The argument sa_size should initially contain the size
* of the sa, and after the call, it will contain the actual length
* of the address.
*
* @param context a Keberos context
* @param af address family
* @param sa sockaddr
* @param sa_size lenght of sa.
* @param port for to fill into sa.
*
* @return Return an error code or 0.
*
* @ingroup krb5_address
*/
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_anyaddr (krb5_context context,
int af,
struct sockaddr *sa,
krb5_socklen_t *sa_size,
int port)
{
struct addr_operations *a = find_af (af);
if (a == NULL) {
krb5_set_error_message (context, KRB5_PROG_ATYPE_NOSUPP,
N_("Address family %d not supported", ""), af);
return KRB5_PROG_ATYPE_NOSUPP;
}
(*a->anyaddr)(sa, sa_size, port);
return 0;
}
/**
* krb5_print_address prints the address in addr to the string string
* that have the length len. If ret_len is not NULL, it will be filled
* with the length of the string if size were unlimited (not including
* the final NUL) .
*
* @param addr address to be printed
* @param str pointer string to print the address into
* @param len length that will fit into area pointed to by "str".
* @param ret_len return length the str.
*
* @return Return an error code or 0.
*
* @ingroup krb5_address
*/
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
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);
int ret;
if (a == NULL || a->print_addr == NULL) {
char *s;
int l;
size_t i;
s = str;
l = snprintf(s, len, "TYPE_%d:", addr->addr_type);
if (l < 0 || (size_t)l >= len)
return EINVAL;
s += l;
len -= l;
for(i = 0; i < addr->address.length; i++) {
l = snprintf(s, len, "%02x", ((char*)addr->address.data)[i]);
if (l < 0 || (size_t)l >= len)
return EINVAL;
len -= l;
s += l;
}
if(ret_len != NULL)
*ret_len = s - str;
return 0;
}
ret = (*a->print_addr)(addr, str, len);
if (ret < 0)
return EINVAL;
if(ret_len != NULL)
*ret_len = ret;
return 0;
}
/**
* krb5_parse_address returns the resolved hostname in string to the
* krb5_addresses addresses .
*
* @param context a Keberos context
* @param string
* @param addresses
*
* @return Return an error code or 0.
*
* @ingroup krb5_address
*/
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_parse_address(krb5_context context,
const char *string,
krb5_addresses *addresses)
{
int i, n;
struct addrinfo *ai, *a;
int error;
int save_errno;
addresses->len = 0;
addresses->val = NULL;
for(i = 0; i < num_addrs; i++) {
if(at[i].parse_addr) {
krb5_address addr;
if((*at[i].parse_addr)(context, string, &addr) == 0) {
ALLOC_SEQ(addresses, 1);
if (addresses->val == NULL) {
krb5_set_error_message(context, ENOMEM,
N_("malloc: out of memory", ""));
return ENOMEM;
}
addresses->val[0] = addr;
return 0;
}
}
}
error = getaddrinfo (string, NULL, NULL, &ai);
if (error) {
krb5_error_code ret2;
save_errno = errno;
ret2 = krb5_eai_to_heim_errno(error, save_errno);
krb5_set_error_message (context, ret2, "%s: %s",
string, gai_strerror(error));
return ret2;
}
n = 0;
for (a = ai; a != NULL; a = a->ai_next)
++n;
ALLOC_SEQ(addresses, n);
if (addresses->val == NULL) {
krb5_set_error_message(context, ENOMEM,
N_("malloc: out of memory", ""));
freeaddrinfo(ai);
return ENOMEM;
}
addresses->len = 0;
for (a = ai, i = 0; a != NULL; a = a->ai_next) {
if (krb5_sockaddr2address (context, ai->ai_addr, &addresses->val[i]))
continue;
if(krb5_address_search(context, &addresses->val[i], addresses)) {
krb5_free_address(context, &addresses->val[i]);
continue;
}
i++;
addresses->len = i;
}
freeaddrinfo (ai);
return 0;
}
/**
* krb5_address_order compares the addresses addr1 and addr2 so that
* it can be used for sorting addresses. If the addresses are the same
* address krb5_address_order will return 0. Behavies like memcmp(2).
*
* @param context a Keberos context
* @param addr1 krb5_address to compare
* @param addr2 krb5_address to compare
*
* @return < 0 if address addr1 in "less" then addr2. 0 if addr1 and
* addr2 is the same address, > 0 if addr2 is "less" then addr1.
*
* @ingroup krb5_address
*/
KRB5_LIB_FUNCTION int KRB5_LIB_CALL
krb5_address_order(krb5_context context,
const krb5_address *addr1,
const krb5_address *addr2)
{
/* this sucks; what if both addresses have order functions, which
should we call? this works for now, though */
struct addr_operations *a;
a = find_atype(addr1->addr_type);
if(a == NULL) {
krb5_set_error_message (context, KRB5_PROG_ATYPE_NOSUPP,
N_("Address family %d not supported", ""),
addr1->addr_type);
return KRB5_PROG_ATYPE_NOSUPP;
}
if(a->order_addr != NULL)
return (*a->order_addr)(context, addr1, addr2);
a = find_atype(addr2->addr_type);
if(a == NULL) {
krb5_set_error_message (context, KRB5_PROG_ATYPE_NOSUPP,
N_("Address family %d not supported", ""),
addr2->addr_type);
return KRB5_PROG_ATYPE_NOSUPP;
}
if(a->order_addr != NULL)
return (*a->order_addr)(context, addr1, addr2);
if(addr1->addr_type != addr2->addr_type)
return addr1->addr_type - addr2->addr_type;
if(addr1->address.length != addr2->address.length)
return addr1->address.length - addr2->address.length;
return memcmp (addr1->address.data,
addr2->address.data,
addr1->address.length);
}
/**
* krb5_address_compare compares the addresses addr1 and addr2.
* Returns TRUE if the two addresses are the same.
*
* @param context a Keberos context
* @param addr1 address to compare
* @param addr2 address to compare
*
* @return Return an TRUE is the address are the same FALSE if not
*
* @ingroup krb5_address
*/
KRB5_LIB_FUNCTION krb5_boolean KRB5_LIB_CALL
krb5_address_compare(krb5_context context,
const krb5_address *addr1,
const krb5_address *addr2)
{
return krb5_address_order (context, addr1, addr2) == 0;
}
/**
* krb5_address_search checks if the address addr is a member of the
* address set list addrlist .
*
* @param context a Keberos context.
* @param addr address to search for.
* @param addrlist list of addresses to look in for addr.
*
* @return Return an error code or 0.
*
* @ingroup krb5_address
*/
KRB5_LIB_FUNCTION krb5_boolean KRB5_LIB_CALL
krb5_address_search(krb5_context context,
const krb5_address *addr,
const krb5_addresses *addrlist)
{
size_t i;
for (i = 0; i < addrlist->len; ++i)
if (krb5_address_compare (context, addr, &addrlist->val[i]))
return TRUE;
return FALSE;
}
/**
* krb5_free_address frees the data stored in the address that is
* alloced with any of the krb5_address functions.
*
* @param context a Keberos context
* @param address addresss to be freed.
*
* @return Return an error code or 0.
*
* @ingroup krb5_address
*/
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_free_address(krb5_context context,
krb5_address *address)
{
struct addr_operations *a = find_atype (address->addr_type);
if(a != NULL && a->free_addr != NULL)
return (*a->free_addr)(context, address);
krb5_data_free (&address->address);
memset(address, 0, sizeof(*address));
return 0;
}
/**
* krb5_free_addresses frees the data stored in the address that is
* alloced with any of the krb5_address functions.
*
* @param context a Keberos context
* @param addresses addressses to be freed.
*
* @return Return an error code or 0.
*
* @ingroup krb5_address
*/
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_free_addresses(krb5_context context,
krb5_addresses *addresses)
{
size_t i;
for(i = 0; i < addresses->len; i++)
krb5_free_address(context, &addresses->val[i]);
free(addresses->val);
addresses->len = 0;
addresses->val = NULL;
return 0;
}
/**
* krb5_copy_address copies the content of address
* inaddr to outaddr.
*
* @param context a Keberos context
* @param inaddr pointer to source address
* @param outaddr pointer to destination address
*
* @return Return an error code or 0.
*
* @ingroup krb5_address
*/
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_copy_address(krb5_context context,
const krb5_address *inaddr,
krb5_address *outaddr)
{
struct addr_operations *a = find_af (inaddr->addr_type);
if(a != NULL && a->copy_addr != NULL)
return (*a->copy_addr)(context, inaddr, outaddr);
return copy_HostAddress(inaddr, outaddr);
}
/**
* krb5_copy_addresses copies the content of addresses
* inaddr to outaddr.
*
* @param context a Keberos context
* @param inaddr pointer to source addresses
* @param outaddr pointer to destination addresses
*
* @return Return an error code or 0.
*
* @ingroup krb5_address
*/
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_copy_addresses(krb5_context context,
const krb5_addresses *inaddr,
krb5_addresses *outaddr)
{
size_t i;
ALLOC_SEQ(outaddr, inaddr->len);
if(inaddr->len > 0 && outaddr->val == NULL)
return ENOMEM;
for(i = 0; i < inaddr->len; i++)
krb5_copy_address(context, &inaddr->val[i], &outaddr->val[i]);
return 0;
}
/**
* krb5_append_addresses adds the set of addresses in source to
* dest. While copying the addresses, duplicates are also sorted out.
*
* @param context a Keberos context
* @param dest destination of copy operation
* @param source adresses that are going to be added to dest
*
* @return Return an error code or 0.
*
* @ingroup krb5_address
*/
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_append_addresses(krb5_context context,
krb5_addresses *dest,
const krb5_addresses *source)
{
krb5_address *tmp;
krb5_error_code ret;
size_t i;
if(source->len > 0) {
tmp = realloc(dest->val, (dest->len + source->len) * sizeof(*tmp));
if(tmp == NULL) {
krb5_set_error_message (context, ENOMEM,
N_("malloc: out of memory", ""));
return ENOMEM;
}
dest->val = tmp;
for(i = 0; i < source->len; i++) {
/* skip duplicates */
if(krb5_address_search(context, &source->val[i], dest))
continue;
ret = krb5_copy_address(context,
&source->val[i],
&dest->val[dest->len]);
if(ret)
return ret;
dest->len++;
}
}
return 0;
}
/**
* Create an address of type KRB5_ADDRESS_ADDRPORT from (addr, port)
*
* @param context a Keberos context
* @param res built address from addr/port
* @param addr address to use
* @param port port to use
*
* @return Return an error code or 0.
*
* @ingroup krb5_address
*/
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_make_addrport (krb5_context context,
krb5_address **res, const krb5_address *addr, int16_t port)
{
krb5_error_code ret;
size_t len = addr->address.length + 2 + 4 * 4;
u_char *p;
*res = malloc (sizeof(**res));
if (*res == NULL) {
krb5_set_error_message (context, ENOMEM,
N_("malloc: out of memory", ""));
return ENOMEM;
}
(*res)->addr_type = KRB5_ADDRESS_ADDRPORT;
ret = krb5_data_alloc (&(*res)->address, len);
if (ret) {
krb5_set_error_message (context, ret,
N_("malloc: out of memory", ""));
free (*res);
*res = NULL;
return ret;
}
p = (*res)->address.data;
*p++ = 0;
*p++ = 0;
*p++ = (addr->addr_type ) & 0xFF;
*p++ = (addr->addr_type >> 8) & 0xFF;
*p++ = (addr->address.length ) & 0xFF;
*p++ = (addr->address.length >> 8) & 0xFF;
*p++ = (addr->address.length >> 16) & 0xFF;
*p++ = (addr->address.length >> 24) & 0xFF;
memcpy (p, addr->address.data, addr->address.length);
p += addr->address.length;
*p++ = 0;
*p++ = 0;
*p++ = (KRB5_ADDRESS_IPPORT ) & 0xFF;
*p++ = (KRB5_ADDRESS_IPPORT >> 8) & 0xFF;
*p++ = (2 ) & 0xFF;
*p++ = (2 >> 8) & 0xFF;
*p++ = (2 >> 16) & 0xFF;
*p++ = (2 >> 24) & 0xFF;
memcpy (p, &port, 2);
return 0;
}
/**
* Calculate the boundary addresses of `inaddr'/`prefixlen' and store
* them in `low' and `high'.
*
* @param context a Keberos context
* @param inaddr address in prefixlen that the bondery searched
* @param prefixlen width of boundery
* @param low lowest address
* @param high highest address
*
* @return Return an error code or 0.
*
* @ingroup krb5_address
*/
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
krb5_address_prefixlen_boundary(krb5_context context,
const krb5_address *inaddr,
unsigned long prefixlen,
krb5_address *low,
krb5_address *high)
{
struct addr_operations *a = find_atype (inaddr->addr_type);
if(a != NULL && a->mask_boundary != NULL)
return (*a->mask_boundary)(context, inaddr, prefixlen, low, high);
krb5_set_error_message(context, KRB5_PROG_ATYPE_NOSUPP,
N_("Address family %d doesn't support "
"address mask operation", ""),
inaddr->addr_type);
return KRB5_PROG_ATYPE_NOSUPP;
}
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