Logo Search packages:      
Sourcecode: openldap version File versions

url.c

/* LIBLDAP url.c -- LDAP URL (RFC 4516) related routines */
/* $OpenLDAP: pkg/ldap/libraries/libldap/url.c,v 1.94.2.8 2008/02/11 23:41:37 quanah Exp $ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
 *
 * Copyright 1998-2008 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 4515
 *
 *  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 );
}

int
ldap_pvt_scope2bv( int scope, struct berval *bv )
{
      switch ( scope ) {
      case LDAP_SCOPE_BASE:
            BER_BVSTR( bv, "base" );
            break;

      case LDAP_SCOPE_ONELEVEL:
            BER_BVSTR( bv, "one" );
            break;

      case LDAP_SCOPE_SUBTREE:
            BER_BVSTR( bv, "sub" );
            break;

      case LDAP_SCOPE_SUBORDINATE:
            BER_BVSTR( bv, "subordinate" );
            break;

      default:
            return LDAP_OTHER;
      }

      return LDAP_SUCCESS;
}

const char *
ldap_pvt_scope2str( int scope )
{
      struct berval     bv;

      if ( ldap_pvt_scope2bv( scope, &bv ) == LDAP_SUCCESS ) {
            return bv.bv_val;
      }

      return NULL;
}

int
ldap_pvt_bv2scope( struct berval *bv )
{
      static struct {
            struct berval     bv;
            int         scope;
      }     v[] = {
            { BER_BVC( "one" ),           LDAP_SCOPE_ONELEVEL },
            { BER_BVC( "onelevel" ),      LDAP_SCOPE_ONELEVEL },
            { BER_BVC( "base" ),          LDAP_SCOPE_BASE },
            { BER_BVC( "sub" ),           LDAP_SCOPE_SUBTREE },
            { BER_BVC( "subtree" ),       LDAP_SCOPE_SUBTREE },
            { BER_BVC( "subord" ),        LDAP_SCOPE_SUBORDINATE },
            { BER_BVC( "subordinate" ),   LDAP_SCOPE_SUBORDINATE },
            { BER_BVC( "children" ),      LDAP_SCOPE_SUBORDINATE },
            { BER_BVNULL,                 -1 }
      };
      int   i;

      for ( i = 0; v[ i ].scope != -1; i++ ) {
            if ( ber_bvstrcasecmp( bv, &v[ i ].bv ) == 0 ) {
                  return v[ i ].scope;
            }
      }

      return( -1 );
}

int
ldap_pvt_str2scope( const char *p )
{
      struct berval     bv;

      ber_str2bv( p, 0, 0, &bv );

      return ldap_pvt_bv2scope( &bv );
}

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( (unsigned char) 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( (unsigned char) 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;
      int         is_ipc = 0;
      struct berval     scope;

      if ( u == NULL || u->lud_scheme == NULL ) {
            return -1;
      }

      if ( !strcmp( "ldapi", u->lud_scheme )) {
            is_ipc = 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;
            }
      }

      if ( ldap_pvt_scope2bv( u->lud_scope, &scope ) == LDAP_SUCCESS ) {
            len += scope.bv_len;
            if ( !sep ) {
                  sep = 3;
            }
      }

      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 ) {
            unsigned p = u->lud_port;
            if ( p > 65535 )
                  return -1;

            len += (p > 999 ? 5 + (p > 9999) : p > 99 ? 4 : 2 + (p > 9));
      }

      if ( u->lud_host && u->lud_host[0] ) {
            len += hex_escape_len( u->lud_host, URLESC_SLASH );
            if ( !is_ipc && strchr( u->lud_host, ':' )) {
                  len += 2;   /* IPv6, [] */
            }
      }

      len += strlen( u->lud_scheme ) + STRLENOF( "://" );

      return len;
}

static int
desc2str( LDAPURLDesc *u, char *s, int len )
{
      int         i;
      int         sep = 0;
      int         sofar = 0;
      int         is_v6 = 0;
      int         is_ipc = 0;
      struct berval     scope = BER_BVNULL;

      if ( u == NULL ) {
            return -1;
      }

      if ( s == NULL ) {
            return -1;
      }

      if ( u->lud_scheme && !strcmp( "ldapi", u->lud_scheme )) {
            is_ipc = 1;
      }

      ldap_pvt_scope2bv( u->lud_scope, &scope );

      if ( u->lud_exts ) {
            sep = 5;
      } else if ( u->lud_filter ) {
            sep = 4;
      } else if ( !BER_BVISEMPTY( &scope ) ) {
            sep = 3;
      } else if ( u->lud_attrs ) {
            sep = 2;
      } else if ( u->lud_dn && u->lud_dn[0] ) {
            sep = 1;
      }

      if ( !is_ipc && u->lud_host && strchr( u->lud_host, ':' )) {
            is_v6 = 1;
      }

      if ( u->lud_port ) {
            sofar = sprintf( s, "%s://%s%s%s:%d", u->lud_scheme,
                        is_v6 ? "[" : "",
                        u->lud_host ? u->lud_host : "",
                        is_v6 ? "]" : "",
                        u->lud_port );
            len -= sofar;

      } else {
            sofar = sprintf( s, "%s://", u->lud_scheme );
            len -= sofar;
            if ( u->lud_host && u->lud_host[0] ) {
                  if ( is_v6 ) {
                        s[sofar++] = '[';
                        len--;
                  }
                  i = hex_escape( &s[sofar], len, u->lud_host, URLESC_SLASH );
                  sofar += i;
                  len -= i;
                  if ( is_v6 ) {
                        s[sofar++] = ']';
                        len--;
                  }
            }
      }

      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 );

      if ( !BER_BVISNULL( &scope ) ) {
            strcpy( &s[sofar], scope.bv_val );
            sofar += scope.bv_len;
            len -= scope.bv_len;
      }

      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, unsigned flags )
{
/*
 *  Pick apart the pieces of an LDAP URL.
 */

      LDAPURLDesc *ludp;
      char  *p, *q, *r;
      int         i, enclosed, proto, is_v6 = 0;
      const char *scheme = NULL;
      const char *url_tmp;
      char *url;

      int   check_dn = 1;

      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 );

      proto = ldap_pvt_url_scheme2proto( scheme );
      if ( proto == -1 ) {
            return LDAP_URL_ERR_BADSCHEME;
      }

      /* 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 = ( flags & LDAP_PVT_URL_PARSE_NODEF_SCOPE ) ? LDAP_SCOPE_BASE : 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, '/' );
      q = NULL;

      if( p != NULL ) {
            /* terminate hostport; point to start of dn */
            *p++ = '\0';
      } else {
            /* check for Novell kludge, see below */
            p = strchr( url, '?' );
            if ( p ) {
                  *p++ = '\0';
                  q = p;
                  p = NULL;
            }
      }

      if ( proto != LDAP_PROTO_IPC ) {
            /* 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, ':' );
                  if ( q && q != r ) {
                        LDAP_FREE( url );
                        ldap_free_urldesc( ludp );
                        return LDAP_URL_ERR_BADURL;
                  }
                  is_v6 = 1;
            } 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 == q || next[0] != '\0' ) {
                        LDAP_FREE( url );
                        ldap_free_urldesc( ludp );
                        return LDAP_URL_ERR_BADURL;
                  }
                  /* check for Novell kludge */
                  if ( !p ) {
                        if ( *next != '\0' ) {
                              q = &next[1];
                        } else {
                              q = NULL;
                        }
                  }
            }

            if ( ( flags & LDAP_PVT_URL_PARSE_DEF_PORT ) && ludp->lud_port == 0 ) {
                  if ( strcmp( ludp->lud_scheme, "ldaps" ) == 0 ) {
                        ludp->lud_port = LDAPS_PORT;
                  } else {
                        ludp->lud_port = LDAP_PORT;
                  }
            }
      }

      ldap_pvt_hex_unescape( url );

      /* If [ip address]:port syntax, url is [ip and we skip the [ */
      ludp->lud_host = LDAP_STRDUP( url + is_v6 );

      if( ludp->lud_host == NULL ) {
            LDAP_FREE( url );
            ldap_free_urldesc( ludp );
            return LDAP_URL_ERR_MEM;
      }

      if ( ( flags & LDAP_PVT_URL_PARSE_NOEMPTY_HOST )
            && ludp->lud_host != NULL
            && *ludp->lud_host == '\0' )
      {
            LDAP_FREE( ludp->lud_host );
            ludp->lud_host = NULL;
      }

      /*
       * 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 == '?') ) {
            /* ? immediately followed by question */
            q++;
            if( *q != '\0' ) {
                  /* parse dn part */
                  ldap_pvt_hex_unescape( q );
                  ludp->lud_dn = LDAP_STRDUP( q );

            } else if ( !( flags & LDAP_PVT_URL_PARSE_NOEMPTY_DN ) ) {
                  ludp->lud_dn = LDAP_STRDUP( "" );

            } else {
                  check_dn = 0;
            }

            if ( check_dn && 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 if ( !( flags & LDAP_PVT_URL_PARSE_NOEMPTY_DN ) ) {
            ludp->lud_dn = LDAP_STRDUP( "" );

      } else {
            check_dn = 0;
      }

      if( check_dn && 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 = ldap_pvt_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 )
{
      return ldap_url_parse_ext( url_in, ludpp, LDAP_PVT_URL_PARSE_HISTORIC );
}

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;
}

static int
ldap_url_parselist_int (LDAPURLDesc **ludlist, const char *url, const char *sep, unsigned flags )
      
{
      int i, rc;
      LDAPURLDesc *ludp;
      char **urls;

      assert( ludlist != NULL );
      assert( url != NULL );

      *ludlist = NULL;

      if ( sep == NULL ) {
            sep = ", ";
      }

      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_ext( urls[i], &ludp, flags );
            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_parselist (LDAPURLDesc **ludlist, const char *url )
{
      return ldap_url_parselist_int( ludlist, url, ", ", LDAP_PVT_URL_PARSE_HISTORIC );
}

int
ldap_url_parselist_ext (LDAPURLDesc **ludlist, const char *url, const char *sep, unsigned flags )
{
      return ldap_url_parselist_int( ludlist, url, sep, flags );
}

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 ) {
                                    LDAP_FREE(ludp);
                                    ldap_charray_free(specs);
                                    return LDAP_PARAM_ERROR;
                              }
                              *p++ = '\0';
                              if ( *p != ':' ) {
                                    if ( *p != '\0' ) {
                                          LDAP_FREE(ludp);
                                          ldap_charray_free(specs);
                                          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 == p || next[0] != '\0' ) {
                              LDAP_FREE(ludp);
                              ldap_charray_free(specs);
                              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';
}


Generated by  Doxygen 1.6.0   Back to index