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-rw-r--r--crypto/heimdal/lib/krb5/get_addrs.c310
1 files changed, 310 insertions, 0 deletions
diff --git a/crypto/heimdal/lib/krb5/get_addrs.c b/crypto/heimdal/lib/krb5/get_addrs.c
new file mode 100644
index 000000000000..65a1b3c7bdd5
--- /dev/null
+++ b/crypto/heimdal/lib/krb5/get_addrs.c
@@ -0,0 +1,310 @@
+/*
+ * 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: get_addrs.c,v 1.35 1999/12/02 17:05:09 joda Exp $");
+
+#ifdef __osf__
+/* hate */
+struct rtentry;
+struct mbuf;
+#endif
+#ifdef HAVE_NET_IF_H
+#include <net/if.h>
+#endif
+
+#ifdef HAVE_SYS_SOCKIO_H
+#include <sys/sockio.h>
+#endif /* HAVE_SYS_SOCKIO_H */
+
+#ifdef HAVE_NETINET_IN6_VAR_H
+#include <netinet/in6_var.h>
+#endif /* HAVE_NETINET_IN6_VAR_H */
+
+static krb5_error_code
+gethostname_fallback (krb5_addresses *res)
+{
+ krb5_error_code err;
+ char hostname[MAXHOSTNAMELEN];
+ struct hostent *hostent;
+
+ if (gethostname (hostname, sizeof(hostname)))
+ return errno;
+ hostent = roken_gethostbyname (hostname);
+ if (hostent == NULL)
+ return errno;
+ res->len = 1;
+ res->val = malloc (sizeof(*res->val));
+ if (res->val == NULL)
+ return ENOMEM;
+ res->val[0].addr_type = hostent->h_addrtype;
+ res->val[0].address.data = NULL;
+ res->val[0].address.length = 0;
+ err = krb5_data_copy (&res->val[0].address,
+ hostent->h_addr,
+ hostent->h_length);
+ if (err) {
+ free (res->val);
+ return err;
+ }
+ return 0;
+}
+
+enum {
+ LOOP = 1, /* do include loopback interfaces */
+ LOOP_IF_NONE = 2, /* include loopback if no other if's */
+ 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,
+ int af, int siocgifconf, int siocgifflags,
+ size_t ifreq_sz)
+{
+ krb5_error_code ret;
+ int fd;
+ size_t buf_size;
+ char *buf;
+ struct ifconf ifconf;
+ int num, j = 0;
+ char *p;
+ size_t sz;
+ struct sockaddr sa_zero;
+ struct ifreq *ifr;
+ krb5_address lo_addr;
+ int got_lo = FALSE;
+
+ buf = NULL;
+ res->val = NULL;
+
+ memset (&sa_zero, 0, sizeof(sa_zero));
+ fd = socket(af, SOCK_DGRAM, 0);
+ if (fd < 0)
+ return -1;
+
+ buf_size = 8192;
+ for (;;) {
+ buf = malloc(buf_size);
+ if (buf == NULL) {
+ ret = ENOMEM;
+ goto error_out;
+ }
+ ifconf.ifc_len = buf_size;
+ ifconf.ifc_buf = buf;
+ if (ioctl (fd, siocgifconf, &ifconf) < 0) {
+ ret = errno;
+ goto error_out;
+ }
+ /*
+ * Can the difference between a full and a overfull buf
+ * be determined?
+ */
+
+ if (ifconf.ifc_len < buf_size)
+ break;
+ free (buf);
+ buf_size *= 2;
+ }
+
+ num = ifconf.ifc_len / ifreq_sz;
+ res->len = num;
+ res->val = calloc(num, sizeof(*res->val));
+ if (res->val == NULL) {
+ ret = ENOMEM;
+ goto error_out;
+ }
+
+ j = 0;
+ for (p = ifconf.ifc_buf;
+ p < ifconf.ifc_buf + ifconf.ifc_len;
+ p += sz) {
+ struct ifreq ifreq;
+ struct sockaddr *sa;
+
+ ifr = (struct ifreq *)p;
+ sa = &ifr->ifr_addr;
+
+ sz = ifreq_sz;
+#ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
+ sz = max(sz, sizeof(ifr->ifr_name) + sa->sa_len);
+#endif
+#ifdef SA_LEN
+ sz = max(sz, SA_LEN(sa));
+#endif
+ memcpy (ifreq.ifr_name, ifr->ifr_name, sizeof(ifr->ifr_name));
+
+ if (ioctl(fd, siocgifflags, &ifreq) < 0) {
+ ret = errno;
+ goto error_out;
+ }
+
+ if (!(ifreq.ifr_flags & IFF_UP))
+ continue;
+ if (memcmp (sa, &sa_zero, sizeof(sa_zero)) == 0)
+ continue;
+ if (krb5_sockaddr_uninteresting (sa))
+ continue;
+
+ if (ifreq.ifr_flags & IFF_LOOPBACK) {
+ if (flags & LOOP_IF_NONE) {
+ ret = krb5_sockaddr2address (sa, &lo_addr);
+ if (ret)
+ goto error_out;
+ got_lo = TRUE;
+ continue;
+ } else if((flags & LOOP) == 0)
+ continue;
+ }
+
+ ret = krb5_sockaddr2address (sa, &res->val[j]);
+ if (ret)
+ goto error_out;
+ ++j;
+ }
+ if ((flags & LOOP_IF_NONE) && got_lo) {
+ if (j == 0)
+ res->val[j++] = lo_addr;
+ else
+ krb5_free_address (context, &lo_addr);
+ }
+
+ if (j != num) {
+ void *tmp;
+
+ res->len = j;
+ tmp = realloc (res->val, j * sizeof(*res->val));
+ if (j != 0 && tmp == NULL) {
+ ret = ENOMEM;
+ goto error_out;
+ }
+ res->val = tmp;
+ }
+ ret = 0;
+ goto cleanup;
+
+error_out:
+ if (got_lo)
+ krb5_free_address (context, &lo_addr);
+ while(j--) {
+ krb5_free_address (context, &res->val[j]);
+ }
+ free (res->val);
+cleanup:
+ close (fd);
+ free (buf);
+ return ret;
+}
+
+static krb5_error_code
+get_addrs_int (krb5_context context, krb5_addresses *res, int flags)
+{
+ krb5_error_code ret = -1;
+
+ if (flags & SCAN_INTERFACES) {
+#if defined(AF_INET6) && defined(SIOCGIF6CONF) && defined(SIOCGIF6FLAGS)
+ if (ret)
+ ret = find_all_addresses (context, res, flags,
+ AF_INET6, SIOCGIF6CONF, SIOCGIF6FLAGS,
+ sizeof(struct in6_ifreq));
+#endif
+#if defined(HAVE_IPV6) && defined(SIOCGIFCONF)
+ if (ret)
+ ret = find_all_addresses (context, res, flags,
+ AF_INET6, SIOCGIFCONF, SIOCGIFFLAGS,
+ sizeof(struct ifreq));
+#endif
+#if defined(AF_INET) && defined(SIOCGIFCONF) && defined(SIOCGIFFLAGS)
+ if (ret)
+ ret = find_all_addresses (context, res, flags,
+ AF_INET, SIOCGIFCONF, SIOCGIFFLAGS,
+ sizeof(struct ifreq));
+ if(ret || res->len == 0)
+ ret = gethostname_fallback (res);
+#endif
+ } else
+ ret = 0;
+
+ if(ret == 0 && (flags & EXTRA_ADDRESSES)) {
+ /* append user specified addresses */
+ krb5_addresses a;
+ 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);
+ }
+ 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_error_code
+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_error_code
+krb5_get_all_server_addrs (krb5_context context, krb5_addresses *res)
+{
+ return get_addrs_int (context, res, LOOP | SCAN_INTERFACES);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2025-02-23 09:21:28 +0000