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-rw-r--r--crypto/heimdal/lib/krb5/get_addrs.c285
1 files changed, 107 insertions, 178 deletions
diff --git a/crypto/heimdal/lib/krb5/get_addrs.c b/crypto/heimdal/lib/krb5/get_addrs.c
index 65a1b3c..7b9d74c 100644
--- a/crypto/heimdal/lib/krb5/get_addrs.c
+++ b/crypto/heimdal/lib/krb5/get_addrs.c
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 1997 - 1999 Kungliga Tekniska Högskolan
+ * Copyright (c) 1997 - 2000 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
@@ -33,7 +33,7 @@
#include "krb5_locl.h"
-RCSID("$Id: get_addrs.c,v 1.35 1999/12/02 17:05:09 joda Exp $");
+RCSID("$Id: get_addrs.c,v 1.40 2000/12/10 20:07:05 assar Exp $");
#ifdef __osf__
/* hate */
@@ -43,42 +43,35 @@ struct mbuf;
#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 */
+#include <ifaddrs.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;
+ 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 {
@@ -94,143 +87,96 @@ enum {
*/
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)
+find_all_addresses (krb5_context context, krb5_addresses *res, int flags)
{
- 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;
+ struct sockaddr sa_zero;
+ struct ifaddrs *ifa0, *ifa;
+ krb5_error_code ret = ENXIO;
+ int num, idx;
- 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?
- */
+ res->val = NULL;
- if (ifconf.ifc_len < buf_size)
- break;
- free (buf);
- buf_size *= 2;
- }
+ if (getifaddrs(&ifa0) == -1)
+ return (errno);
- 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));
+ memset(&sa_zero, 0, sizeof(sa_zero));
- if (ioctl(fd, siocgifflags, &ifreq) < 0) {
- ret = errno;
- goto error_out;
- }
+ /* First, count all the ifaddrs. */
+ for (ifa = ifa0, num = 0; ifa != NULL; ifa = ifa->ifa_next, num++)
+ /* nothing */;
- if (!(ifreq.ifr_flags & IFF_UP))
- continue;
- if (memcmp (sa, &sa_zero, sizeof(sa_zero)) == 0)
- continue;
- if (krb5_sockaddr_uninteresting (sa))
- continue;
+ if (num == 0) {
+ freeifaddrs(ifa0);
+ return (ENXIO);
+ }
- 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;
- }
+ /* Allocate storage for them. */
+ res->val = calloc(num, sizeof(*res->val));
+ if (res->val == NULL) {
+ freeifaddrs(ifa0);
+ return (ENOMEM);
+ }
- 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);
- }
+ /* Now traverse the list. */
+ for (ifa = ifa0, idx = 0; ifa != NULL; ifa = ifa->ifa_next) {
+ if ((ifa->ifa_flags & IFF_UP) == 0)
+ continue;
+ if (memcmp(ifa->ifa_addr, &sa_zero, sizeof(sa_zero)) == 0)
+ continue;
+ if (krb5_sockaddr_uninteresting(ifa->ifa_addr))
+ continue;
+
+ if ((ifa->ifa_flags & IFF_LOOPBACK) != 0) {
+ /* We'll deal with the LOOP_IF_NONE case later. */
+ if ((flags & LOOP) == 0)
+ continue;
+ }
- if (j != num) {
- void *tmp;
+ ret = krb5_sockaddr2address(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;
+ }
+ idx++;
+ }
- 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;
+ /*
+ * 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 (memcmp(ifa->ifa_addr, &sa_zero, sizeof(sa_zero)) == 0)
+ continue;
+ if (krb5_sockaddr_uninteresting(ifa->ifa_addr))
+ continue;
+
+ if ((ifa->ifa_flags & IFF_LOOPBACK) != 0) {
+ ret = krb5_sockaddr2address(ifa->ifa_addr, &res->val[idx]);
+ if (ret) {
+ /*
+ * See comment above.
+ */
+ continue;
+ }
+ idx++;
+ }
+ }
+ }
-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;
+ freeifaddrs(ifa0);
+ if (ret)
+ free(res->val);
+ else
+ res->len = idx; /* Now a count. */
+ return (ret);
}
static krb5_error_code
@@ -239,26 +185,9 @@ 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));
+ ret = find_all_addresses (context, res, flags);
if(ret || res->len == 0)
ret = gethostname_fallback (res);
-#endif
} else
ret = 0;
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