From 4f5791ebd03eaec1c7da0865a383175b05102712 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 5 May 2024 19:47:29 +0200 Subject: Adding upstream version 2:4.17.12+dfsg. Signed-off-by: Daniel Baumann --- third_party/heimdal/lib/krb5/get_addrs.c | 283 +++++++++++++++++++++++++++++++ 1 file changed, 283 insertions(+) create mode 100644 third_party/heimdal/lib/krb5/get_addrs.c (limited to 'third_party/heimdal/lib/krb5/get_addrs.c') diff --git a/third_party/heimdal/lib/krb5/get_addrs.c b/third_party/heimdal/lib/krb5/get_addrs.c new file mode 100644 index 0000000..8246504 --- /dev/null +++ b/third_party/heimdal/lib/krb5/get_addrs.c @@ -0,0 +1,283 @@ +/* + * Copyright (c) 1997 - 2002 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" + +#ifdef __osf__ +/* hate */ +struct rtentry; +struct mbuf; +#endif +#ifdef HAVE_NET_IF_H +#include +#endif +#include + +static krb5_error_code +gethostname_fallback (krb5_context context, krb5_addresses *res) +{ + krb5_error_code ret; + char hostname[MAXHOSTNAMELEN]; + struct hostent *hostent; + + if (gethostname (hostname, sizeof(hostname))) { + ret = errno; + krb5_set_error_message(context, ret, "gethostname: %s", strerror(ret)); + return ret; + } + hostent = roken_gethostbyname (hostname); + if (hostent == NULL) { + ret = errno; + krb5_set_error_message (context, ret, "gethostbyname %s: %s", + hostname, strerror(ret)); + return ret; + } + res->len = 1; + res->val = malloc (sizeof(*res->val)); + if (res->val == NULL) + return krb5_enomem(context); + res->val[0].addr_type = hostent->h_addrtype; + res->val[0].address.data = NULL; + res->val[0].address.length = 0; + ret = krb5_data_copy (&res->val[0].address, + hostent->h_addr, + hostent->h_length); + if (ret) { + free (res->val); + return ret; + } + return 0; +} + +enum { + LOOP = 1, /* do include loopback addrs */ + LOOP_IF_NONE = 2, /* include loopback addrs if no others */ + EXTRA_ADDRESSES = 4, /* include extra addresses */ + SCAN_INTERFACES = 8 /* scan interfaces for addresses */ +}; + +/* + * Try to figure out the addresses of all configured interfaces with a + * lot of magic ioctls. + */ + +static krb5_error_code +find_all_addresses (krb5_context context, krb5_addresses *res, int flags) +{ + struct sockaddr sa_zero; + struct ifaddrs *ifa0, *ifa; + krb5_error_code ret = ENXIO; + unsigned int num, idx; + krb5_addresses ignore_addresses; + + if (getifaddrs(&ifa0) == -1) { + ret = errno; + krb5_set_error_message(context, ret, "getifaddrs: %s", strerror(ret)); + return (ret); + } + + memset(&sa_zero, 0, sizeof(sa_zero)); + + /* First, count all the ifaddrs. */ + for (ifa = ifa0, num = 0; ifa != NULL; ifa = ifa->ifa_next, num++) + /* nothing */; + + if (num == 0) { + freeifaddrs(ifa0); + krb5_set_error_message(context, ENXIO, N_("no addresses found", "")); + return (ENXIO); + } + + if (flags & EXTRA_ADDRESSES) { + /* we'll remove the addresses we don't care about */ + ret = krb5_get_ignore_addresses(context, &ignore_addresses); + if(ret) + return ret; + } + + /* Allocate storage for them. */ + res->val = calloc(num, sizeof(*res->val)); + if (res->val == NULL) { + if (flags & EXTRA_ADDRESSES) + krb5_free_addresses(context, &ignore_addresses); + freeifaddrs(ifa0); + return krb5_enomem(context); + } + + /* Now traverse the list. */ + for (ifa = ifa0, idx = 0; ifa != NULL; ifa = ifa->ifa_next) { + if ((ifa->ifa_flags & IFF_UP) == 0) + continue; + if (ifa->ifa_addr == NULL) + continue; + if (memcmp(ifa->ifa_addr, &sa_zero, sizeof(sa_zero)) == 0) + continue; + if (krb5_sockaddr_uninteresting(ifa->ifa_addr)) + continue; + if (krb5_sockaddr_is_loopback(ifa->ifa_addr) && (flags & LOOP) == 0) + /* We'll deal with the LOOP_IF_NONE case later. */ + continue; + + ret = krb5_sockaddr2address(context, ifa->ifa_addr, &res->val[idx]); + if (ret) { + /* + * The most likely error here is going to be "Program + * lacks support for address type". This is no big + * deal -- just continue, and we'll listen on the + * addresses who's type we *do* support. + */ + continue; + } + /* possibly skip this address? */ + if((flags & EXTRA_ADDRESSES) && + krb5_address_search(context, &res->val[idx], &ignore_addresses)) { + krb5_free_address(context, &res->val[idx]); + flags &= ~LOOP_IF_NONE; /* we actually found an address, + so don't add any loop-back + addresses */ + continue; + } + + idx++; + } + + /* + * If no addresses were found, and LOOP_IF_NONE is set, then find + * the loopback addresses and add them to our list. + */ + if ((flags & LOOP_IF_NONE) != 0 && idx == 0) { + for (ifa = ifa0; ifa != NULL; ifa = ifa->ifa_next) { + if ((ifa->ifa_flags & IFF_UP) == 0) + continue; + if (ifa->ifa_addr == NULL) + continue; + if (memcmp(ifa->ifa_addr, &sa_zero, sizeof(sa_zero)) == 0) + continue; + if (krb5_sockaddr_uninteresting(ifa->ifa_addr)) + continue; + if (!krb5_sockaddr_is_loopback(ifa->ifa_addr)) + continue; + if ((ifa->ifa_flags & IFF_LOOPBACK) == 0) + /* Presumably loopback addrs are only used on loopback ifs! */ + continue; + ret = krb5_sockaddr2address(context, + ifa->ifa_addr, &res->val[idx]); + if (ret) + continue; /* We don't consider this failure fatal */ + if((flags & EXTRA_ADDRESSES) && + krb5_address_search(context, &res->val[idx], + &ignore_addresses)) { + krb5_free_address(context, &res->val[idx]); + continue; + } + idx++; + } + } + + if (flags & EXTRA_ADDRESSES) + krb5_free_addresses(context, &ignore_addresses); + freeifaddrs(ifa0); + if (ret) { + free(res->val); + res->val = NULL; + } else + res->len = idx; /* Now a count. */ + return (ret); +} + +static krb5_error_code +get_addrs_int (krb5_context context, krb5_addresses *res, int flags) +{ + krb5_error_code ret = -1; + + res->len = 0; + res->val = NULL; + + if (flags & SCAN_INTERFACES) { + ret = find_all_addresses (context, res, flags); + if(ret || res->len == 0) + ret = gethostname_fallback (context, res); + } else { + ret = 0; + } + + if(ret == 0 && (flags & EXTRA_ADDRESSES)) { + krb5_addresses a; + /* append user specified addresses */ + ret = krb5_get_extra_addresses(context, &a); + if(ret) { + krb5_free_addresses(context, res); + return ret; + } + ret = krb5_append_addresses(context, res, &a); + if(ret) { + krb5_free_addresses(context, res); + return ret; + } + krb5_free_addresses(context, &a); + } + if(res->len == 0) { + free(res->val); + res->val = NULL; + } + return ret; +} + +/* + * Try to get all addresses, but return the one corresponding to + * `hostname' if we fail. + * + * Only include loopback address if there are no other. + */ + +KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL +krb5_get_all_client_addrs (krb5_context context, krb5_addresses *res) +{ + int flags = LOOP_IF_NONE | EXTRA_ADDRESSES; + + if (context->scan_interfaces) + flags |= SCAN_INTERFACES; + + return get_addrs_int (context, res, flags); +} + +/* + * Try to get all local addresses that a server should listen to. + * If that fails, we return the address corresponding to `hostname'. + */ + +KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL +krb5_get_all_server_addrs (krb5_context context, krb5_addresses *res) +{ + return get_addrs_int (context, res, LOOP | SCAN_INTERFACES); +} -- cgit v1.2.3