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/** BEGIN COPYRIGHT BLOCK
* Copyright (C) 2001 Sun Microsystems, Inc. Used by permission.
* Copyright (C) 2005 Red Hat, Inc.
* All rights reserved.
* END COPYRIGHT BLOCK **/
#include <stdio.h>
#include <sys/types.h>
#include <string.h>
#ifdef _WIN32
#define MAXHOSTNAMELEN 256
#else
#include <sys/param.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <arpa/nameser.h>
#include <resolv.h>
#endif
#include <errno.h>
#include "slap.h"
#if defined(USE_SYSCONF) || defined(LINUX)
#include <unistd.h>
#endif /* USE_SYSCONF */
#if defined( NET_SSL )
#include <ssl.h>
#include "fe.h"
#endif /* defined(NET_SSL) */
#ifndef _PATH_RESCONF /* usually defined in <resolv.h> */
#define _PATH_RESCONF "/etc/resolv.conf"
#endif
#if !defined(NO_DOMAINNAME) && defined(_WINDOWS)
#define NO_DOMAINNAME 1
#endif
#if defined (__hpux)
#if (MAXHOSTNAMELEN < 256)
# undef MAXHOSTNAMELEN
# define MAXHOSTNAMELEN 256
#endif
#endif
static char*
find_localhost_DNS()
{
/* This implementation could (and should) be entirely replaced by:
dns_ip2host ("127.0.0.1", 1); defined in ldapserver/lib/base/dns.c
*/
char hostname [MAXHOSTNAMELEN + 1];
struct hostent *hp;
#ifdef GETHOSTBYNAME_BUF_T
struct hostent hent;
GETHOSTBYNAME_BUF_T hbuf;
int err;
#endif
char** alias;
FILE* f;
char* cp;
char* domain;
char line [MAXHOSTNAMELEN + 8];
if (gethostname (hostname, MAXHOSTNAMELEN)) {
int oserr = errno;
LDAPDebug (LDAP_DEBUG_ANY, "gethostname() failed, error %d (%s)\n",
oserr, slapd_system_strerror( oserr ), 0 );
return NULL;
}
hp = GETHOSTBYNAME (hostname, &hent, hbuf, sizeof(hbuf), &err);
if (hp == NULL) {
int oserr = errno;
LDAPDebug( LDAP_DEBUG_ANY,
"gethostbyname(\"%s\") failed, error %d (%s)\n",
hostname, oserr, slapd_system_strerror( oserr ));
return NULL;
}
if (hp->h_name == NULL) {
LDAPDebug (LDAP_DEBUG_ANY, "gethostbyname(\"%s\")->h_name == NULL\n", hostname, 0, 0);
return NULL;
}
if (strchr (hp->h_name, '.') != NULL) {
LDAPDebug (LDAP_DEBUG_CONFIG, "h_name == %s\n", hp->h_name, 0, 0);
return slapi_ch_strdup (hp->h_name);
} else if (hp->h_aliases != NULL) {
for (alias = hp->h_aliases; *alias != NULL; ++alias) {
if (strchr (*alias, '.') != NULL &&
strncmp (*alias, hp->h_name, strlen (hp->h_name))) {
LDAPDebug (LDAP_DEBUG_CONFIG, "h_alias == %s\n", *alias, 0, 0);
return slapi_ch_strdup (*alias);
}
}
}
/* The following is copied from dns_guess_domain(),
in ldapserver/lib/base/dnsdmain.c */
domain = NULL;
f = fopen (_PATH_RESCONF, "r"); /* This fopen() will fail on NT, as expected */
if (f != NULL) {
while (fgets (line, sizeof(line), f)) {
if (strncasecmp (line, "domain", 6) == 0 && isspace (line[6])) {
LDAPDebug (LDAP_DEBUG_CONFIG, "%s: %s\n", _PATH_RESCONF, line, 0);
for (cp = &line[7]; *cp && isspace(*cp); ++cp);
if (*cp) {
domain = cp;
/* ignore subsequent whitespace: */
for (; *cp && ! isspace (*cp); ++cp);
if (*cp) {
*cp = '\0';
}
}
break;
}
}
fclose (f);
}
#ifndef NO_DOMAINNAME
if (domain == NULL) {
/* No domain found. Try getdomainname. */
getdomainname (line, sizeof(line));
LDAPDebug (LDAP_DEBUG_CONFIG, "getdomainname(%s)\n", line, 0, 0);
if (line[0] != 0) {
domain = &line[0];
}
}
#endif
if (domain == NULL) {
return NULL;
}
strcpy (hostname, hp->h_name);
if (domain[0] == '.') ++domain;
if (domain[0]) {
strcat (hostname, ".");
strcat (hostname, domain);
}
LDAPDebug (LDAP_DEBUG_CONFIG, "hostname == %s\n", hostname, 0, 0);
return slapi_ch_strdup (hostname);
}
static const char* const RDN = "dc=";
static char*
convert_DNS_to_DN (char* DNS)
{
char* DN;
char* dot;
size_t components;
if (*DNS == '\0') {
return slapi_ch_strdup ("");
}
components = 1;
for (dot = strchr (DNS, '.'); dot != NULL; dot = strchr (dot + 1, '.')) {
++components;
}
DN = slapi_ch_malloc (strlen (DNS) + (components * strlen(RDN)) + 1);
strcpy (DN, RDN);
for (dot = strchr (DNS, '.'); dot != NULL; dot = strchr (dot + 1, '.')) {
*dot = '\0';
strcat (DN, DNS);
strcat (DN, ",");
strcat (DN, RDN);
DNS = dot + 1;
*dot = '.';
}
strcat (DN, DNS);
slapi_dn_normalize (DN);
return DN;
}
static char* localhost_DN = NULL;
char*
get_localhost_DNS()
{
char *retVal;
if ( (retVal = config_get_localhost()) == NULL) {
/* find_localhost_DNS() returns strdup result */
retVal = find_localhost_DNS();
}
return retVal;
}
static void
set_localhost_DN()
{
char *localhost_DNS = config_get_localhost();
if (localhost_DNS != NULL) {
localhost_DN = convert_DNS_to_DN (localhost_DNS);
LDAPDebug (LDAP_DEBUG_CONFIG, "DNS %s -> DN %s\n", localhost_DNS, localhost_DN, 0);
}
slapi_ch_free( (void **) &localhost_DNS );
}
char*
get_localhost_DN()
/* Return the Distinguished Name of the local host; that is,
its DNS name converted to a DN according to RFC 1279.
The caller should _not_ free this pointer. */
{
if (localhost_DN == NULL) {
set_localhost_DN();
}
return localhost_DN;
}
static char* config_DN = NULL;
char *
get_config_DN()
{
char *c;
char *host;
if ( config_DN == NULL )
{
host = get_localhost_DN();
if ( host )
c = slapi_ch_malloc (20 + strlen (host));
else {
LDAPDebug (LDAP_DEBUG_CONFIG, "get_locahost_DN() returned \"\"\n",
0, 0, 0);
c = slapi_ch_malloc (20);
}
sprintf (c, "cn=ldap://%s:%d", host ? host : "", config_get_port());
config_DN = c;
}
return config_DN;
}
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