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openldap/libraries/libldap/url.c

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/* LIBLDAP url.c -- LDAP URL (RFC 2255) related routines */
/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
* Copyright 1998-2005 The OpenLDAP Foundation.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted only as authorized by the OpenLDAP
* Public License.
*
* A copy of this license is available in the file LICENSE in the
* top-level directory of the distribution or, alternatively, at
* <http://www.OpenLDAP.org/license.html>.
*/
/* Portions Copyright (c) 1996 Regents of the University of Michigan.
* All rights reserved.
*/
/*
* LDAP URLs look like this:
* ldap[is]://host:port[/[dn[?[attributes][?[scope][?[filter][?exts]]]]]]
*
* where:
* attributes is a comma separated list
* scope is one of these three strings: base one sub (default=base)
* filter is an string-represented filter as in RFC 2254
*
* e.g., ldap://host:port/dc=com?o,cn?base?(o=openldap)?extension
*
* We also tolerate URLs that look like: <ldapurl> and <URL:ldapurl>
*/
#include "portable.h"
#include <stdio.h>
#include <ac/stdlib.h>
#include <ac/ctype.h>
#include <ac/socket.h>
#include <ac/string.h>
#include <ac/time.h>
#include "ldap-int.h"
/* local functions */
static const char* skip_url_prefix LDAP_P((
const char *url,
int *enclosedp,
const char **scheme ));
int ldap_pvt_url_scheme2proto( const char *scheme )
{
assert( scheme != NULL );
if( scheme == NULL ) {
return -1;
}
if( strcmp("ldap", scheme) == 0 ) {
return LDAP_PROTO_TCP;
}
if( strcmp("ldapi", scheme) == 0 ) {
return LDAP_PROTO_IPC;
}
if( strcmp("ldaps", scheme) == 0 ) {
return LDAP_PROTO_TCP;
}
#ifdef LDAP_CONNECTIONLESS
if( strcmp("cldap", scheme) == 0 ) {
return LDAP_PROTO_UDP;
}
#endif
return -1;
}
int ldap_pvt_url_scheme_port( const char *scheme, int port )
{
assert( scheme != NULL );
if( port ) return port;
if( scheme == NULL ) return port;
if( strcmp("ldap", scheme) == 0 ) {
return LDAP_PORT;
}
if( strcmp("ldapi", scheme) == 0 ) {
return -1;
}
if( strcmp("ldaps", scheme) == 0 ) {
return LDAPS_PORT;
}
#ifdef LDAP_CONNECTIONLESS
if( strcmp("cldap", scheme) == 0 ) {
return LDAP_PORT;
}
#endif
return -1;
}
int
ldap_pvt_url_scheme2tls( const char *scheme )
{
assert( scheme != NULL );
if( scheme == NULL ) {
return -1;
}
return strcmp("ldaps", scheme) == 0;
}
int
ldap_is_ldap_url( LDAP_CONST char *url )
{
int enclosed;
const char * scheme;
if( url == NULL ) {
return 0;
}
if( skip_url_prefix( url, &enclosed, &scheme ) == NULL ) {
return 0;
}
return 1;
}
int
ldap_is_ldaps_url( LDAP_CONST char *url )
{
int enclosed;
const char * scheme;
if( url == NULL ) {
return 0;
}
if( skip_url_prefix( url, &enclosed, &scheme ) == NULL ) {
return 0;
}
return strcmp(scheme, "ldaps") == 0;
}
int
ldap_is_ldapi_url( LDAP_CONST char *url )
{
int enclosed;
const char * scheme;
if( url == NULL ) {
return 0;
}
if( skip_url_prefix( url, &enclosed, &scheme ) == NULL ) {
return 0;
}
return strcmp(scheme, "ldapi") == 0;
}
#ifdef LDAP_CONNECTIONLESS
int
ldap_is_ldapc_url( LDAP_CONST char *url )
{
int enclosed;
const char * scheme;
if( url == NULL ) {
return 0;
}
if( skip_url_prefix( url, &enclosed, &scheme ) == NULL ) {
return 0;
}
return strcmp(scheme, "cldap") == 0;
}
#endif
static const char*
skip_url_prefix(
const char *url,
int *enclosedp,
const char **scheme )
{
/*
* return non-zero if this looks like a LDAP URL; zero if not
* if non-zero returned, *urlp will be moved past "ldap://" part of URL
*/
const char *p;
if ( url == NULL ) {
return( NULL );
}
p = url;
/* skip leading '<' (if any) */
if ( *p == '<' ) {
*enclosedp = 1;
++p;
} else {
*enclosedp = 0;
}
/* skip leading "URL:" (if any) */
if ( strncasecmp( p, LDAP_URL_URLCOLON, LDAP_URL_URLCOLON_LEN ) == 0 ) {
p += LDAP_URL_URLCOLON_LEN;
}
/* check for "ldap://" prefix */
if ( strncasecmp( p, LDAP_URL_PREFIX, LDAP_URL_PREFIX_LEN ) == 0 ) {
/* skip over "ldap://" prefix and return success */
p += LDAP_URL_PREFIX_LEN;
*scheme = "ldap";
return( p );
}
/* check for "ldaps://" prefix */
if ( strncasecmp( p, LDAPS_URL_PREFIX, LDAPS_URL_PREFIX_LEN ) == 0 ) {
/* skip over "ldaps://" prefix and return success */
p += LDAPS_URL_PREFIX_LEN;
*scheme = "ldaps";
return( p );
}
/* check for "ldapi://" prefix */
if ( strncasecmp( p, LDAPI_URL_PREFIX, LDAPI_URL_PREFIX_LEN ) == 0 ) {
/* skip over "ldapi://" prefix and return success */
p += LDAPI_URL_PREFIX_LEN;
*scheme = "ldapi";
return( p );
}
#ifdef LDAP_CONNECTIONLESS
/* check for "cldap://" prefix */
if ( strncasecmp( p, LDAPC_URL_PREFIX, LDAPC_URL_PREFIX_LEN ) == 0 ) {
/* skip over "cldap://" prefix and return success */
p += LDAPC_URL_PREFIX_LEN;
*scheme = "cldap";
return( p );
}
#endif
return( NULL );
}
static int str2scope( const char *p )
{
if ( strcasecmp( p, "one" ) == 0 ) {
return LDAP_SCOPE_ONELEVEL;
} else if ( strcasecmp( p, "onelevel" ) == 0 ) {
return LDAP_SCOPE_ONELEVEL;
} else if ( strcasecmp( p, "base" ) == 0 ) {
return LDAP_SCOPE_BASE;
} else if ( strcasecmp( p, "sub" ) == 0 ) {
return LDAP_SCOPE_SUBTREE;
} else if ( strcasecmp( p, "subtree" ) == 0 ) {
return LDAP_SCOPE_SUBTREE;
#ifdef LDAP_SCOPE_SUBORDINATE
} else if ( strcasecmp( p, "subordinate" ) == 0 ) {
return LDAP_SCOPE_SUBORDINATE;
} else if ( strcasecmp( p, "children" ) == 0 ) {
return LDAP_SCOPE_SUBORDINATE;
#endif
}
return( -1 );
}
static const char hex[] = "0123456789ABCDEF";
#define URLESC_NONE 0x0000U
#define URLESC_COMMA 0x0001U
#define URLESC_SLASH 0x0002U
static int
hex_escape_len( const char *s, unsigned list )
{
int len;
if ( s == NULL ) {
return 0;
}
for ( len = 0; s[0]; s++ ) {
switch ( s[0] ) {
/* RFC 2396: reserved */
case '?':
len += 3;
break;
case ',':
if ( list & URLESC_COMMA ) {
len += 3;
} else {
len++;
}
break;
case '/':
if ( list & URLESC_SLASH ) {
len += 3;
} else {
len++;
}
break;
case ';':
case ':':
case '@':
case '&':
case '=':
case '+':
case '$':
/* RFC 2396: unreserved mark */
case '-':
case '_':
case '.':
case '!':
case '~':
case '*':
case '\'':
case '(':
case ')':
len++;
break;
/* RFC 2396: unreserved alphanum */
default:
if ( !isalnum( s[0] ) ) {
len += 3;
} else {
len++;
}
break;
}
}
return len;
}
static int
hex_escape( char *buf, int len, const char *s, unsigned list )
{
int i;
int pos;
if ( s == NULL ) {
return 0;
}
for ( pos = 0, i = 0; s[i] && pos < len; i++ ) {
int escape = 0;
switch ( s[i] ) {
/* RFC 2396: reserved */
case '?':
escape = 1;
break;
case ',':
if ( list & URLESC_COMMA ) {
escape = 1;
}
break;
case '/':
if ( list & URLESC_SLASH ) {
escape = 1;
}
break;
case ';':
case ':':
case '@':
case '&':
case '=':
case '+':
case '$':
/* RFC 2396: unreserved mark */
case '-':
case '_':
case '.':
case '!':
case '~':
case '*':
case '\'':
case '(':
case ')':
break;
/* RFC 2396: unreserved alphanum */
default:
if ( !isalnum( s[i] ) ) {
escape = 1;
}
break;
}
if ( escape ) {
buf[pos++] = '%';
buf[pos++] = hex[ (s[i] >> 4) & 0x0f ];
buf[pos++] = hex[ s[i] & 0x0f ];
} else {
buf[pos++] = s[i];
}
}
buf[pos] = '\0';
return pos;
}
static int
hex_escape_len_list( char **s, unsigned flags )
{
int len;
int i;
if ( s == NULL ) {
return 0;
}
len = 0;
for ( i = 0; s[i] != NULL; i++ ) {
if ( len ) {
len++;
}
len += hex_escape_len( s[i], flags );
}
return len;
}
static int
hex_escape_list( char *buf, int len, char **s, unsigned flags )
{
int pos;
int i;
if ( s == NULL ) {
return 0;
}
pos = 0;
for ( i = 0; s[i] != NULL; i++ ) {
int curlen;
if ( pos ) {
buf[pos++] = ',';
len--;
}
curlen = hex_escape( &buf[pos], len, s[i], flags );
len -= curlen;
pos += curlen;
}
return pos;
}
static int
desc2str_len( LDAPURLDesc *u )
{
int sep = 0;
int len = 0;
if ( u == NULL ) {
return -1;
}
if ( u->lud_exts ) {
len += hex_escape_len_list( u->lud_exts, URLESC_COMMA );
if ( !sep ) {
sep = 5;
}
}
if ( u->lud_filter ) {
len += hex_escape_len( u->lud_filter, URLESC_NONE );
if ( !sep ) {
sep = 4;
}
}
switch ( u->lud_scope ) {
case LDAP_SCOPE_BASE:
case LDAP_SCOPE_ONELEVEL:
case LDAP_SCOPE_SUBTREE:
#ifdef LDAP_SCOPE_SUBORDINATE
case LDAP_SCOPE_SUBORDINATE:
#endif
switch ( u->lud_scope ) {
case LDAP_SCOPE_BASE:
len += STRLENOF( "base" );
break;
case LDAP_SCOPE_ONELEVEL:
len += STRLENOF( "one" );
break;
case LDAP_SCOPE_SUBTREE:
len += STRLENOF( "sub" );
break;
#ifdef LDAP_SCOPE_SUBORDINATE
case LDAP_SCOPE_SUBORDINATE:
len += STRLENOF( "subordinate" );
break;
#endif
}
if ( !sep ) {
sep = 3;
}
break;
default:
break;
}
if ( u->lud_attrs ) {
len += hex_escape_len_list( u->lud_attrs, URLESC_NONE );
if ( !sep ) {
sep = 2;
}
}
if ( u->lud_dn && u->lud_dn[0] ) {
len += hex_escape_len( u->lud_dn, URLESC_NONE );
if ( !sep ) {
sep = 1;
}
};
len += sep;
if ( u->lud_port ) {
char buf[] = ":65535";
len += snprintf( buf, sizeof( buf ), ":%d", u->lud_port );
if ( u->lud_host && u->lud_host[0] ) {
len += strlen( u->lud_host );
}
} else {
if ( u->lud_host && u->lud_host[0] ) {
len += hex_escape_len( u->lud_host, URLESC_SLASH );
}
}
len += strlen( u->lud_scheme ) + STRLENOF( "://" );
return len;
}
int
desc2str( LDAPURLDesc *u, char *s, int len )
{
int i;
int sep = 0;
int sofar = 0;
int gotscope = 0;
if ( u == NULL ) {
return -1;
}
if ( s == NULL ) {
return -1;
}
switch ( u->lud_scope ) {
case LDAP_SCOPE_BASE:
case LDAP_SCOPE_ONELEVEL:
case LDAP_SCOPE_SUBTREE:
#ifdef LDAP_SCOPE_SUBORDINATE
case LDAP_SCOPE_SUBORDINATE:
#endif
gotscope = 1;
break;
}
if ( u->lud_exts ) {
sep = 5;
} else if ( u->lud_filter ) {
sep = 4;
} else if ( gotscope ) {
sep = 3;
} else if ( u->lud_attrs ) {
sep = 2;
} else if ( u->lud_dn && u->lud_dn[0] ) {
sep = 1;
}
if ( u->lud_port ) {
len -= sprintf( s, "%s://%s:%d%n", u->lud_scheme,
u->lud_host ? u->lud_host : "",
u->lud_port, &sofar );
} else {
len -= sprintf( s, "%s://%n", u->lud_scheme, &sofar );
if ( u->lud_host && u->lud_host[0] ) {
i = hex_escape( &s[sofar], len, u->lud_host, URLESC_SLASH );
sofar += i;
len -= i;
}
}
assert( len >= 0 );
if ( sep < 1 ) {
goto done;
}
s[sofar++] = '/';
len--;
assert( len >= 0 );
if ( u->lud_dn && u->lud_dn[0] ) {
i = hex_escape( &s[sofar], len, u->lud_dn, URLESC_NONE );
sofar += i;
len -= i;
assert( len >= 0 );
}
if ( sep < 2 ) {
goto done;
}
s[sofar++] = '?';
len--;
assert( len >= 0 );
i = hex_escape_list( &s[sofar], len, u->lud_attrs, URLESC_NONE );
sofar += i;
len -= i;
assert( len >= 0 );
if ( sep < 3 ) {
goto done;
}
s[sofar++] = '?';
len--;
assert( len >= 0 );
switch ( u->lud_scope ) {
case LDAP_SCOPE_BASE:
strcpy( &s[sofar], "base" );
sofar += STRLENOF("base");
len -= STRLENOF("base");
break;
case LDAP_SCOPE_ONELEVEL:
strcpy( &s[sofar], "one" );
sofar += STRLENOF("one");
len -= STRLENOF("one");
break;
case LDAP_SCOPE_SUBTREE:
strcpy( &s[sofar], "sub" );
sofar += STRLENOF("sub");
len -= STRLENOF("sub");
break;
#ifdef LDAP_SCOPE_SUBORDINATE
case LDAP_SCOPE_SUBORDINATE:
strcpy( &s[sofar], "children" );
sofar += STRLENOF("children");
len -= STRLENOF("children");
break;
#endif
}
assert( len >= 0 );
if ( sep < 4 ) {
goto done;
}
s[sofar++] = '?';
len--;
assert( len >= 0 );
i = hex_escape( &s[sofar], len, u->lud_filter, URLESC_NONE );
sofar += i;
len -= i;
assert( len >= 0 );
if ( sep < 5 ) {
goto done;
}
s[sofar++] = '?';
len--;
assert( len >= 0 );
i = hex_escape_list( &s[sofar], len, u->lud_exts, URLESC_COMMA );
sofar += i;
len -= i;
assert( len >= 0 );
done:
if ( len < 0 ) {
return -1;
}
return sofar;
}
char *
ldap_url_desc2str( LDAPURLDesc *u )
{
int len;
char *s;
if ( u == NULL ) {
return NULL;
}
len = desc2str_len( u );
if ( len < 0 ) {
return NULL;
}
/* allocate enough to hex escape everything -- overkill */
s = LDAP_MALLOC( len + 1 );
if ( s == NULL ) {
return NULL;
}
if ( desc2str( u, s, len ) != len ) {
LDAP_FREE( s );
return NULL;
}
s[len] = '\0';
return s;
}
int
ldap_url_parse_ext( LDAP_CONST char *url_in, LDAPURLDesc **ludpp )
{
/*
* Pick apart the pieces of an LDAP URL.
*/
LDAPURLDesc *ludp;
char *p, *q, *r;
int i, enclosed;
const char *scheme = NULL;
const char *url_tmp;
char *url;
if( url_in == NULL || ludpp == NULL ) {
return LDAP_URL_ERR_PARAM;
}
#ifndef LDAP_INT_IN_KERNEL
/* Global options may not be created yet
* We can't test if the global options are initialized
* because a call to LDAP_INT_GLOBAL_OPT() will try to allocate
* the options and cause infinite recursion
*/
Debug( LDAP_DEBUG_TRACE, "ldap_url_parse_ext(%s)\n", url_in, 0, 0 );
#endif
*ludpp = NULL; /* pessimistic */
url_tmp = skip_url_prefix( url_in, &enclosed, &scheme );
if ( url_tmp == NULL ) {
return LDAP_URL_ERR_BADSCHEME;
}
assert( scheme != NULL );
/* make working copy of the remainder of the URL */
url = LDAP_STRDUP( url_tmp );
if ( url == NULL ) {
return LDAP_URL_ERR_MEM;
}
if ( enclosed ) {
p = &url[strlen(url)-1];
if( *p != '>' ) {
LDAP_FREE( url );
return LDAP_URL_ERR_BADENCLOSURE;
}
*p = '\0';
}
/* allocate return struct */
ludp = (LDAPURLDesc *)LDAP_CALLOC( 1, sizeof( LDAPURLDesc ));
if ( ludp == NULL ) {
LDAP_FREE( url );
return LDAP_URL_ERR_MEM;
}
ludp->lud_next = NULL;
ludp->lud_host = NULL;
ludp->lud_port = 0;
ludp->lud_dn = NULL;
ludp->lud_attrs = NULL;
ludp->lud_scope = LDAP_SCOPE_DEFAULT;
ludp->lud_filter = NULL;
ludp->lud_exts = NULL;
ludp->lud_scheme = LDAP_STRDUP( scheme );
if ( ludp->lud_scheme == NULL ) {
LDAP_FREE( url );
ldap_free_urldesc( ludp );
return LDAP_URL_ERR_MEM;
}
/* scan forward for '/' that marks end of hostport and begin. of dn */
p = strchr( url, '/' );
if( p != NULL ) {
/* terminate hostport; point to start of dn */
*p++ = '\0';
}
/* IPv6 syntax with [ip address]:port */
if ( *url == '[' ) {
r = strchr( url, ']' );
if ( r == NULL ) {
LDAP_FREE( url );
ldap_free_urldesc( ludp );
return LDAP_URL_ERR_BADURL;
}
*r++ = '\0';
q = strchr( r, ':' );
} else {
q = strchr( url, ':' );
}
if ( q != NULL ) {
char *next;
*q++ = '\0';
ldap_pvt_hex_unescape( q );
if( *q == '\0' ) {
LDAP_FREE( url );
ldap_free_urldesc( ludp );
return LDAP_URL_ERR_BADURL;
}
ludp->lud_port = strtol( q, &next, 10 );
if ( next == NULL || next[0] != '\0' ) {
LDAP_FREE( url );
ldap_free_urldesc( ludp );
return LDAP_URL_ERR_BADURL;
}
}
ldap_pvt_hex_unescape( url );
/* If [ip address]:port syntax, url is [ip and we skip the [ */
ludp->lud_host = LDAP_STRDUP( url + ( *url == '[' ) );
if( ludp->lud_host == NULL ) {
LDAP_FREE( url );
ldap_free_urldesc( ludp );
return LDAP_URL_ERR_MEM;
}
/*
* Kludge. ldap://111.222.333.444:389??cn=abc,o=company
*
* On early Novell releases, search references/referrals were returned
* in this format, i.e., the dn was kind of in the scope position,
* but the required slash is missing. The whole thing is illegal syntax,
* but we need to account for it. Fortunately it can't be confused with
* anything real.
*/
if( (p == NULL) && (q != NULL) && ((q = strchr( q, '?')) != NULL)) {
q++;
/* ? immediately followed by question */
if( *q == '?') {
q++;
if( *q != '\0' ) {
/* parse dn part */
ldap_pvt_hex_unescape( q );
ludp->lud_dn = LDAP_STRDUP( q );
} else {
ludp->lud_dn = LDAP_STRDUP( "" );
}
if( ludp->lud_dn == NULL ) {
LDAP_FREE( url );
ldap_free_urldesc( ludp );
return LDAP_URL_ERR_MEM;
}
}
}
if( p == NULL ) {
LDAP_FREE( url );
*ludpp = ludp;
return LDAP_URL_SUCCESS;
}
/* scan forward for '?' that may marks end of dn */
q = strchr( p, '?' );
if( q != NULL ) {
/* terminate dn part */
*q++ = '\0';
}
if( *p != '\0' ) {
/* parse dn part */
ldap_pvt_hex_unescape( p );
ludp->lud_dn = LDAP_STRDUP( p );
} else {
ludp->lud_dn = LDAP_STRDUP( "" );
}
if( ludp->lud_dn == NULL ) {
LDAP_FREE( url );
ldap_free_urldesc( ludp );
return LDAP_URL_ERR_MEM;
}
if( q == NULL ) {
/* no more */
LDAP_FREE( url );
*ludpp = ludp;
return LDAP_URL_SUCCESS;
}
/* scan forward for '?' that may marks end of attributes */
p = q;
q = strchr( p, '?' );
if( q != NULL ) {
/* terminate attributes part */
*q++ = '\0';
}
if( *p != '\0' ) {
/* parse attributes */
ldap_pvt_hex_unescape( p );
ludp->lud_attrs = ldap_str2charray( p, "," );
if( ludp->lud_attrs == NULL ) {
LDAP_FREE( url );
ldap_free_urldesc( ludp );
return LDAP_URL_ERR_BADATTRS;
}
}
if ( q == NULL ) {
/* no more */
LDAP_FREE( url );
*ludpp = ludp;
return LDAP_URL_SUCCESS;
}
/* scan forward for '?' that may marks end of scope */
p = q;
q = strchr( p, '?' );
if( q != NULL ) {
/* terminate the scope part */
*q++ = '\0';
}
if( *p != '\0' ) {
/* parse the scope */
ldap_pvt_hex_unescape( p );
ludp->lud_scope = str2scope( p );
if( ludp->lud_scope == -1 ) {
LDAP_FREE( url );
ldap_free_urldesc( ludp );
return LDAP_URL_ERR_BADSCOPE;
}
}
if ( q == NULL ) {
/* no more */
LDAP_FREE( url );
*ludpp = ludp;
return LDAP_URL_SUCCESS;
}
/* scan forward for '?' that may marks end of filter */
p = q;
q = strchr( p, '?' );
if( q != NULL ) {
/* terminate the filter part */
*q++ = '\0';
}
if( *p != '\0' ) {
/* parse the filter */
ldap_pvt_hex_unescape( p );
if( ! *p ) {
/* missing filter */
LDAP_FREE( url );
ldap_free_urldesc( ludp );
return LDAP_URL_ERR_BADFILTER;
}
ludp->lud_filter = LDAP_STRDUP( p );
if( ludp->lud_filter == NULL ) {
LDAP_FREE( url );
ldap_free_urldesc( ludp );
return LDAP_URL_ERR_MEM;
}
}
if ( q == NULL ) {
/* no more */
LDAP_FREE( url );
*ludpp = ludp;
return LDAP_URL_SUCCESS;
}
/* scan forward for '?' that may marks end of extensions */
p = q;
q = strchr( p, '?' );
if( q != NULL ) {
/* extra '?' */
LDAP_FREE( url );
ldap_free_urldesc( ludp );
return LDAP_URL_ERR_BADURL;
}
/* parse the extensions */
ludp->lud_exts = ldap_str2charray( p, "," );
if( ludp->lud_exts == NULL ) {
LDAP_FREE( url );
ldap_free_urldesc( ludp );
return LDAP_URL_ERR_BADEXTS;
}
for( i=0; ludp->lud_exts[i] != NULL; i++ ) {
ldap_pvt_hex_unescape( ludp->lud_exts[i] );
if( *ludp->lud_exts[i] == '!' ) {
/* count the number of critical extensions */
ludp->lud_crit_exts++;
}
}
if( i == 0 ) {
/* must have 1 or more */
LDAP_FREE( url );
ldap_free_urldesc( ludp );
return LDAP_URL_ERR_BADEXTS;
}
/* no more */
*ludpp = ludp;
LDAP_FREE( url );
return LDAP_URL_SUCCESS;
}
int
ldap_url_parse( LDAP_CONST char *url_in, LDAPURLDesc **ludpp )
{
int rc = ldap_url_parse_ext( url_in, ludpp );
if( rc != LDAP_URL_SUCCESS ) {
return rc;
}
if ((*ludpp)->lud_scope == LDAP_SCOPE_DEFAULT) {
(*ludpp)->lud_scope = LDAP_SCOPE_BASE;
}
if ((*ludpp)->lud_host != NULL && *(*ludpp)->lud_host == '\0') {
LDAP_FREE( (*ludpp)->lud_host );
(*ludpp)->lud_host = NULL;
}
if ((*ludpp)->lud_port == 0) {
if( strcmp((*ludpp)->lud_scheme, "ldap") == 0 ) {
(*ludpp)->lud_port = LDAP_PORT;
#ifdef LDAP_CONNECTIONLESS
} else if( strcmp((*ludpp)->lud_scheme, "cldap") == 0 ) {
(*ludpp)->lud_port = LDAP_PORT;
#endif
} else if( strcmp((*ludpp)->lud_scheme, "ldaps") == 0 ) {
(*ludpp)->lud_port = LDAPS_PORT;
}
}
return rc;
}
LDAPURLDesc *
ldap_url_dup ( LDAPURLDesc *ludp )
{
LDAPURLDesc *dest;
if ( ludp == NULL ) {
return NULL;
}
dest = LDAP_MALLOC( sizeof(LDAPURLDesc) );
if (dest == NULL)
return NULL;
*dest = *ludp;
dest->lud_scheme = NULL;
dest->lud_host = NULL;
dest->lud_dn = NULL;
dest->lud_filter = NULL;
dest->lud_attrs = NULL;
dest->lud_exts = NULL;
dest->lud_next = NULL;
if ( ludp->lud_scheme != NULL ) {
dest->lud_scheme = LDAP_STRDUP( ludp->lud_scheme );
if (dest->lud_scheme == NULL) {
ldap_free_urldesc(dest);
return NULL;
}
}
if ( ludp->lud_host != NULL ) {
dest->lud_host = LDAP_STRDUP( ludp->lud_host );
if (dest->lud_host == NULL) {
ldap_free_urldesc(dest);
return NULL;
}
}
if ( ludp->lud_dn != NULL ) {
dest->lud_dn = LDAP_STRDUP( ludp->lud_dn );
if (dest->lud_dn == NULL) {
ldap_free_urldesc(dest);
return NULL;
}
}
if ( ludp->lud_filter != NULL ) {
dest->lud_filter = LDAP_STRDUP( ludp->lud_filter );
if (dest->lud_filter == NULL) {
ldap_free_urldesc(dest);
return NULL;
}
}
if ( ludp->lud_attrs != NULL ) {
dest->lud_attrs = ldap_charray_dup( ludp->lud_attrs );
if (dest->lud_attrs == NULL) {
ldap_free_urldesc(dest);
return NULL;
}
}
if ( ludp->lud_exts != NULL ) {
dest->lud_exts = ldap_charray_dup( ludp->lud_exts );
if (dest->lud_exts == NULL) {
ldap_free_urldesc(dest);
return NULL;
}
}
return dest;
}
LDAPURLDesc *
ldap_url_duplist (LDAPURLDesc *ludlist)
{
LDAPURLDesc *dest, *tail, *ludp, *newludp;
dest = NULL;
tail = NULL;
for (ludp = ludlist; ludp != NULL; ludp = ludp->lud_next) {
newludp = ldap_url_dup(ludp);
if (newludp == NULL) {
ldap_free_urllist(dest);
return NULL;
}
if (tail == NULL)
dest = newludp;
else
tail->lud_next = newludp;
tail = newludp;
}
return dest;
}
int
ldap_url_parselist (LDAPURLDesc **ludlist, const char *url )
{
return ldap_url_parselist_ext( ludlist, url, ", " );
}
int
ldap_url_parselist_ext (LDAPURLDesc **ludlist, const char *url, const char *sep )
{
int i, rc;
LDAPURLDesc *ludp;
char **urls;
assert( ludlist != NULL );
assert( url != NULL );
*ludlist = NULL;
urls = ldap_str2charray(url, sep);
if (urls == NULL)
return LDAP_URL_ERR_MEM;
/* count the URLs... */
for (i = 0; urls[i] != NULL; i++) ;
/* ...and put them in the "stack" backward */
while (--i >= 0) {
rc = ldap_url_parse( urls[i], &ludp );
if ( rc != 0 ) {
ldap_charray_free(urls);
ldap_free_urllist(*ludlist);
*ludlist = NULL;
return rc;
}
ludp->lud_next = *ludlist;
*ludlist = ludp;
}
ldap_charray_free(urls);
return LDAP_URL_SUCCESS;
}
int
ldap_url_parsehosts(
LDAPURLDesc **ludlist,
const char *hosts,
int port )
{
int i;
LDAPURLDesc *ludp;
char **specs, *p;
assert( ludlist != NULL );
assert( hosts != NULL );
*ludlist = NULL;
specs = ldap_str2charray(hosts, ", ");
if (specs == NULL)
return LDAP_NO_MEMORY;
/* count the URLs... */
for (i = 0; specs[i] != NULL; i++) /* EMPTY */;
/* ...and put them in the "stack" backward */
while (--i >= 0) {
ludp = LDAP_CALLOC( 1, sizeof(LDAPURLDesc) );
if (ludp == NULL) {
ldap_charray_free(specs);
ldap_free_urllist(*ludlist);
*ludlist = NULL;
return LDAP_NO_MEMORY;
}
ludp->lud_port = port;
ludp->lud_host = specs[i];
specs[i] = NULL;
p = strchr(ludp->lud_host, ':');
if (p != NULL) {
/* more than one :, IPv6 address */
if ( strchr(p+1, ':') != NULL ) {
/* allow [address] and [address]:port */
if ( *ludp->lud_host == '[' ) {
p = LDAP_STRDUP(ludp->lud_host+1);
/* copied, make sure we free source later */
specs[i] = ludp->lud_host;
ludp->lud_host = p;
p = strchr( ludp->lud_host, ']' );
if ( p == NULL )
return LDAP_PARAM_ERROR;
*p++ = '\0';
if ( *p != ':' ) {
if ( *p != '\0' )
return LDAP_PARAM_ERROR;
p = NULL;
}
} else {
p = NULL;
}
}
if (p != NULL) {
char *next;
*p++ = 0;
ldap_pvt_hex_unescape(p);
ludp->lud_port = strtol( p, &next, 10 );
if ( next == NULL || next[0] != '\0' ) {
return LDAP_PARAM_ERROR;
}
}
}
ldap_pvt_hex_unescape(ludp->lud_host);
ludp->lud_scheme = LDAP_STRDUP("ldap");
ludp->lud_next = *ludlist;
*ludlist = ludp;
}
/* this should be an array of NULLs now */
/* except entries starting with [ */
ldap_charray_free(specs);
return LDAP_SUCCESS;
}
char *
ldap_url_list2hosts (LDAPURLDesc *ludlist)
{
LDAPURLDesc *ludp;
int size;
char *s, *p, buf[32]; /* big enough to hold a long decimal # (overkill) */
if (ludlist == NULL)
return NULL;
/* figure out how big the string is */
size = 1; /* nul-term */
for (ludp = ludlist; ludp != NULL; ludp = ludp->lud_next) {
size += strlen(ludp->lud_host) + 1; /* host and space */
if (strchr(ludp->lud_host, ':')) /* will add [ ] below */
size += 2;
if (ludp->lud_port != 0)
size += sprintf(buf, ":%d", ludp->lud_port);
}
s = LDAP_MALLOC(size);
if (s == NULL)
return NULL;
p = s;
for (ludp = ludlist; ludp != NULL; ludp = ludp->lud_next) {
if (strchr(ludp->lud_host, ':')) {
p += sprintf(p, "[%s]", ludp->lud_host);
} else {
strcpy(p, ludp->lud_host);
p += strlen(ludp->lud_host);
}
if (ludp->lud_port != 0)
p += sprintf(p, ":%d", ludp->lud_port);
*p++ = ' ';
}
if (p != s)
p--; /* nuke that extra space */
*p = 0;
return s;
}
char *
ldap_url_list2urls(
LDAPURLDesc *ludlist )
{
LDAPURLDesc *ludp;
int size, sofar;
char *s;
if ( ludlist == NULL ) {
return NULL;
}
/* figure out how big the string is */
for ( size = 0, ludp = ludlist; ludp != NULL; ludp = ludp->lud_next ) {
int len = desc2str_len( ludp );
if ( len < 0 ) {
return NULL;
}
size += len + 1;
}
s = LDAP_MALLOC( size );
if ( s == NULL ) {
return NULL;
}
for ( sofar = 0, ludp = ludlist; ludp != NULL; ludp = ludp->lud_next ) {
int len;
len = desc2str( ludp, &s[sofar], size );
if ( len < 0 ) {
LDAP_FREE( s );
return NULL;
}
sofar += len;
size -= len;
s[sofar++] = ' ';
size--;
assert( size >= 0 );
}
s[sofar - 1] = '\0';
return s;
}
void
ldap_free_urllist( LDAPURLDesc *ludlist )
{
LDAPURLDesc *ludp, *next;
for (ludp = ludlist; ludp != NULL; ludp = next) {
next = ludp->lud_next;
ldap_free_urldesc(ludp);
}
}
void
ldap_free_urldesc( LDAPURLDesc *ludp )
{
if ( ludp == NULL ) {
return;
}
if ( ludp->lud_scheme != NULL ) {
LDAP_FREE( ludp->lud_scheme );
}
if ( ludp->lud_host != NULL ) {
LDAP_FREE( ludp->lud_host );
}
if ( ludp->lud_dn != NULL ) {
LDAP_FREE( ludp->lud_dn );
}
if ( ludp->lud_filter != NULL ) {
LDAP_FREE( ludp->lud_filter);
}
if ( ludp->lud_attrs != NULL ) {
LDAP_VFREE( ludp->lud_attrs );
}
if ( ludp->lud_exts != NULL ) {
LDAP_VFREE( ludp->lud_exts );
}
LDAP_FREE( ludp );
}
static int
ldap_int_is_hexpair( char *s )
{
int i;
for ( i = 0; i < 2; i++ ) {
if ( s[i] >= '0' && s[i] <= '9' ) {
continue;
}
if ( s[i] >= 'A' && s[i] <= 'F' ) {
continue;
}
if ( s[i] >= 'a' && s[i] <= 'f' ) {
continue;
}
return 0;
}
return 1;
}
static int
ldap_int_unhex( int c )
{
return( c >= '0' && c <= '9' ? c - '0'
: c >= 'A' && c <= 'F' ? c - 'A' + 10
: c - 'a' + 10 );
}
void
ldap_pvt_hex_unescape( char *s )
{
/*
* Remove URL hex escapes from s... done in place. The basic concept for
* this routine is borrowed from the WWW library HTUnEscape() routine.
*/
char *p,
*save_s = s;
for ( p = s; *s != '\0'; ++s ) {
if ( *s == '%' ) {
/*
* FIXME: what if '%' is followed
* by non-hexpair chars?
*/
if ( !ldap_int_is_hexpair( s + 1 ) ) {
p = save_s;
break;
}
if ( *++s == '\0' ) {
break;
}
*p = ldap_int_unhex( *s ) << 4;
if ( *++s == '\0' ) {
break;
}
*p++ += ldap_int_unhex( *s );
} else {
*p++ = *s;
}
}
*p = '\0';
}
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