/* $NetBSD: addr_families.c,v 1.2.22.1 2023/08/11 13:40:00 martin Exp $ */ /* * 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(); UNREACHABLE(return 0); } 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, 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; struct addrinfo hint; 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) return krb5_enomem(context); addresses->val[0] = addr; return 0; } } } /* if not parsed as numeric address, do a name lookup */ memset(&hint, 0, sizeof(hint)); hint.ai_family = AF_UNSPEC; error = getaddrinfo (string, NULL, &hint, &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) { freeaddrinfo(ai); return krb5_enomem(context); } addresses->len = 0; for (a = ai, i = 0; a != NULL; a = a->ai_next) { if (krb5_sockaddr2address (context, a->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 krb5_enomem(context); 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) return krb5_enomem(context); 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) return krb5_enomem(context); (*res)->addr_type = KRB5_ADDRESS_ADDRPORT; ret = krb5_data_alloc (&(*res)->address, len); if (ret) { free (*res); *res = NULL; return krb5_enomem(context); } 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; }