mirror of
https://git.openldap.org/openldap/openldap.git
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504 lines
10 KiB
C
504 lines
10 KiB
C
/*
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* Copyright 1998-1999 The OpenLDAP Foundation, All Rights Reserved.
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* COPYING RESTRICTIONS APPLY, see COPYRIGHT file
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*/
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/* Portions
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* Copyright (c) 1995 Regents of the University of Michigan.
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* All rights reserved.
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*
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* os-ip.c -- platform-specific TCP & UDP related code
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*/
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#include "portable.h"
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#include <stdio.h>
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#include <ac/stdlib.h>
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#include <ac/errno.h>
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#include <ac/socket.h>
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#include <ac/string.h>
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#include <ac/time.h>
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#include <ac/unistd.h>
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#ifdef HAVE_IO_H
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#include <io.h>
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#endif /* HAVE_IO_H */
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#include "ldap-int.h"
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int ldap_int_tblsize = 0;
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/*
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* nonblock connect code
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* written by Lars Uffmann, <lars.uffmann@mediaway.net>.
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*
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* Copyright 1999, Lars Uffmann, All rights reserved.
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* This software is not subject to any license of my employer
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* mediaWays GmbH.
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*
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* OpenLDAP COPYING RESTRICTIONS APPLY, see COPYRIGHT file
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*
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* Read about the rationale in ldap_connect_timeout:
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* ftp://koobera.math.uic.edu/www/docs/connect.html.
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*/
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#define osip_debug(ld,fmt,arg1,arg2,arg3) \
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do { \
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ldap_log_printf(ld, LDAP_DEBUG_TRACE, fmt, arg1, arg2, arg3); \
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} while(0)
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static void
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ldap_pvt_set_errno(int err)
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{
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errno = err;
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}
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int
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ldap_int_timeval_dup( struct timeval **dest, const struct timeval *src )
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{
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struct timeval *new;
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assert( dest != NULL );
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if (src == NULL) {
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*dest = NULL;
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return 0;
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}
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new = (struct timeval *) malloc(sizeof(struct timeval));
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if( new == NULL ) {
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*dest = NULL;
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return 1;
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}
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SAFEMEMCPY( (char *) new, (const char *) src, sizeof(struct timeval));
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*dest = new;
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return 0;
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}
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static int
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ldap_pvt_ndelay_on(LDAP *ld, int fd)
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{
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osip_debug(ld, "ldap_ndelay_on: %d\n",fd,0,0);
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return ber_pvt_socket_set_nonblock( fd, 1 );
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}
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static int
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ldap_pvt_ndelay_off(LDAP *ld, int fd)
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{
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osip_debug(ld, "ldap_ndelay_off: %d\n",fd,0,0);
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return ber_pvt_socket_set_nonblock( fd, 0 );
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}
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static ber_socket_t
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ldap_pvt_socket(LDAP *ld)
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{
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ber_socket_t s = socket(AF_INET, SOCK_STREAM, 0);
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osip_debug(ld, "ldap_new_socket: %d\n",s,0,0);
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return ( s );
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}
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static int
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ldap_pvt_close_socket(LDAP *ld, int s)
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{
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osip_debug(ld, "ldap_close_socket: %d\n",s,0,0);
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return tcp_close(s);
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}
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static int
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ldap_pvt_prepare_socket(LDAP *ld, int fd)
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{
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osip_debug(ld, "ldap_prepare_socket: %d\n",fd,0,0);
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#ifdef TCP_NODELAY
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{
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int dummy = 1;
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if ( setsockopt( fd, IPPROTO_TCP, TCP_NODELAY, (char*) &dummy, sizeof(dummy) ) == -1 )
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return -1;
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}
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#endif
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return 0;
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}
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#undef TRACE
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#define TRACE do { \
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osip_debug(ld, \
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"ldap_is_socket_ready: errror on socket %d: errno: %d (%s)\n", \
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s, \
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errno, \
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strerror(errno) ); \
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} while( 0 )
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/*
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* check the socket for errors after select returned.
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*/
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static int
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ldap_pvt_is_socket_ready(LDAP *ld, int s)
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{
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osip_debug(ld, "ldap_is_sock_ready: %d\n",s,0,0);
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#if defined( notyet ) /* && defined( SO_ERROR ) */
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{
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int so_errno;
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int dummy = sizeof(so_errno);
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if ( getsockopt( s, SOL_SOCKET, SO_ERROR, &so_errno, &dummy ) == -1 ) {
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return -1;
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}
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if ( so_errno ) {
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ldap_pvt_set_errno(so_errno);
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TRACE;
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return -1;
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}
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return 0;
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}
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#else
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{
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/* error slippery */
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struct sockaddr_in sin;
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char ch;
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int dummy = sizeof(sin);
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if ( getpeername( s, (struct sockaddr *) &sin, &dummy ) == -1 ) {
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/* XXX: needs to be replace with ber_stream_read() */
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read(s, &ch, 1);
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#ifdef HAVE_WINSOCK
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ldap_pvt_set_errno( WSAGetLastError() );
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#endif
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TRACE;
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return -1;
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}
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return 0;
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}
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#endif
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return -1;
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}
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#undef TRACE
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static int
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ldap_pvt_connect(LDAP *ld, ber_socket_t s, struct sockaddr_in *sin, int async)
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{
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struct timeval tv, *opt_tv=NULL;
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fd_set wfds, *z=NULL;
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if ( (opt_tv = ld->ld_options.ldo_tm_net) != NULL ) {
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tv.tv_usec = opt_tv->tv_usec;
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tv.tv_sec = opt_tv->tv_sec;
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}
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osip_debug(ld, "ldap_connect_timeout: fd: %d tm: %d async: %d\n",
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s, opt_tv ? tv.tv_sec : -1, async);
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if ( ldap_pvt_ndelay_on(ld, s) == -1 )
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return ( -1 );
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if ( connect(s, (struct sockaddr *) sin, sizeof(struct sockaddr_in)) == 0 )
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{
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if ( ldap_pvt_ndelay_off(ld, s) == -1 )
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return ( -1 );
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return ( 0 );
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}
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#ifdef HAVE_WINSOCK
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ldap_pvt_set_errno( WSAGetLastError() );
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#endif
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if ( errno != EINPROGRESS && errno != EWOULDBLOCK ) {
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return ( -1 );
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}
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#ifdef notyet
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if ( async ) return ( -2 );
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#endif
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FD_ZERO(&wfds);
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FD_SET(s, &wfds );
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if ( select(ldap_int_tblsize, z, &wfds, z, opt_tv ? &tv : NULL) == -1)
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return ( -1 );
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if ( FD_ISSET(s, &wfds) ) {
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if ( ldap_pvt_is_socket_ready(ld, s) == -1 )
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return ( -1 );
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if ( ldap_pvt_ndelay_off(ld, s) == -1 )
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return ( -1 );
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return ( 0 );
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}
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osip_debug(ld, "ldap_connect_timeout: timed out\n",0,0,0);
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ldap_pvt_set_errno( ETIMEDOUT );
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return ( -1 );
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}
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#ifndef HAVE_INET_ATON
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int
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ldap_pvt_inet_aton( const char *host, struct in_addr *in)
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{
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unsigned long u = inet_addr( host );
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if ( u != 0xffffffff || u != (unsigned long) -1 ) {
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in->s_addr = u;
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return 1;
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}
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return 0;
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}
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#endif
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int
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ldap_connect_to_host(LDAP *ld, Sockbuf *sb, const char *host,
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unsigned long address, int port, int async)
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{
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struct sockaddr_in sin;
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struct in_addr in;
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ber_socket_t s = AC_SOCKET_INVALID;
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int rc, i, use_hp = 0;
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struct hostent *hp, he_buf;
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int local_h_errno;
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char *ha_buf=NULL, *p, *q;
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osip_debug(ld, "ldap_connect_to_host\n",0,0,0);
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if (host != NULL) {
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if (! inet_aton( host, &in) ) {
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rc = ldap_pvt_gethostbyname_a(host, &he_buf, &ha_buf,
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&hp, &local_h_errno);
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if ( rc < 0 )
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; /*XXX NO MEMORY? */
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if ( (rc < 0) || (hp == NULL) ) {
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#ifdef HAVE_WINSOCK
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ldap_pvt_set_errno( WSAGetLastError() );
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#else
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/* not exactly right, but... */
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ldap_pvt_set_errno( EHOSTUNREACH );
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#endif
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if (ha_buf) LDAP_FREE(ha_buf);
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return -1;
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}
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use_hp = 1;
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}
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address = in.s_addr;
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}
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rc = s = -1;
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for ( i = 0; !use_hp || (hp->h_addr_list[i] != 0); ++i, rc = -1 ) {
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if ( (s = ldap_pvt_socket( ld )) == -1 )
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/* use_hp ? continue : break; */
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break;
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if ( ldap_pvt_prepare_socket(ld, s) == -1 ) {
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ldap_pvt_close_socket(ld, s);
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/* use_hp ? continue : break; */
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break;
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}
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(void)memset((char *)&sin, 0, sizeof(struct sockaddr_in));
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sin.sin_family = AF_INET;
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sin.sin_port = port;
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p = (char *)&sin.sin_addr.s_addr;
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q = use_hp ? (char *)hp->h_addr_list[i] : (char *)&address;
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SAFEMEMCPY(p, q, sizeof(p) );
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osip_debug(ld, "ldap_connect_to_host: Trying %s:%d\n",
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inet_ntoa(sin.sin_addr),ntohs(sin.sin_port),0);
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rc = ldap_pvt_connect(ld, s, &sin, async);
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if ( (rc == 0) || (rc == -2) ) {
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ber_pvt_sb_set_desc( sb, s );
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break;
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}
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ldap_pvt_close_socket(ld, s);
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if (!use_hp)
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break;
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}
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if (ha_buf) LDAP_FREE(ha_buf);
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return rc;
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}
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void
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ldap_close_connection( Sockbuf *sb )
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{
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ber_pvt_sb_close( sb );
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}
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#if defined( HAVE_KERBEROS ) || defined( HAVE_TLS )
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char *
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ldap_host_connected_to( Sockbuf *sb )
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{
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struct hostent *hp;
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char *p;
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socklen_t len;
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struct sockaddr_in sin;
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/* buffers for gethostbyaddr_r */
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struct hostent he_buf;
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int local_h_errno;
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char *ha_buf=NULL;
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#define DO_RETURN(x) if (ha_buf) LDAP_FREE(ha_buf); return (x);
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(void)memset( (char *)&sin, 0, sizeof( struct sockaddr_in ));
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len = sizeof( sin );
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if ( getpeername( ber_pvt_sb_get_desc(sb), (struct sockaddr *)&sin, &len ) == -1 ) {
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return( NULL );
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}
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/*
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* do a reverse lookup on the addr to get the official hostname.
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* this is necessary for kerberos to work right, since the official
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* hostname is used as the kerberos instance.
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*/
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if ((ldap_pvt_gethostbyaddr_a( (char *) &sin.sin_addr,
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sizeof( sin.sin_addr ),
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AF_INET, &he_buf, &ha_buf,
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&hp,&local_h_errno ) ==0 ) && (hp != NULL) )
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{
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if ( hp->h_name != NULL ) {
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char *host = LDAP_STRDUP( hp->h_name );
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DO_RETURN( host );
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}
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}
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DO_RETURN( NULL );
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}
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#undef DO_RETURN
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#endif /* HAVE_KERBEROS || HAVE_TLS */
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/* for UNIX */
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struct selectinfo {
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fd_set si_readfds;
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fd_set si_writefds;
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fd_set si_use_readfds;
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fd_set si_use_writefds;
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};
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void
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ldap_mark_select_write( LDAP *ld, Sockbuf *sb )
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{
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struct selectinfo *sip;
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sip = (struct selectinfo *)ld->ld_selectinfo;
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if ( !FD_ISSET( ber_pvt_sb_get_desc(sb), &sip->si_writefds )) {
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FD_SET( (u_int) sb->sb_sd, &sip->si_writefds );
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}
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}
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void
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ldap_mark_select_read( LDAP *ld, Sockbuf *sb )
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{
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struct selectinfo *sip;
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sip = (struct selectinfo *)ld->ld_selectinfo;
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if ( !FD_ISSET( ber_pvt_sb_get_desc(sb), &sip->si_readfds )) {
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FD_SET( (u_int) sb->sb_sd, &sip->si_readfds );
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}
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}
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void
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ldap_mark_select_clear( LDAP *ld, Sockbuf *sb )
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{
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struct selectinfo *sip;
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sip = (struct selectinfo *)ld->ld_selectinfo;
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FD_CLR( (u_int) ber_pvt_sb_get_desc(sb), &sip->si_writefds );
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FD_CLR( (u_int) ber_pvt_sb_get_desc(sb), &sip->si_readfds );
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}
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int
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ldap_is_write_ready( LDAP *ld, Sockbuf *sb )
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{
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struct selectinfo *sip;
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sip = (struct selectinfo *)ld->ld_selectinfo;
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return( FD_ISSET( ber_pvt_sb_get_desc(sb), &sip->si_use_writefds ));
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}
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int
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ldap_is_read_ready( LDAP *ld, Sockbuf *sb )
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{
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struct selectinfo *sip;
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sip = (struct selectinfo *)ld->ld_selectinfo;
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return( FD_ISSET( ber_pvt_sb_get_desc(sb), &sip->si_use_readfds ));
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}
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void *
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ldap_new_select_info( void )
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{
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struct selectinfo *sip;
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if (( sip = (struct selectinfo *)LDAP_CALLOC( 1,
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sizeof( struct selectinfo ))) != NULL ) {
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FD_ZERO( &sip->si_readfds );
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FD_ZERO( &sip->si_writefds );
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}
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return( (void *)sip );
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}
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void
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ldap_free_select_info( void *sip )
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{
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LDAP_FREE( sip );
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}
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void
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ldap_int_ip_init( void )
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{
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int tblsize;
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#if defined( HAVE_SYSCONF )
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tblsize = sysconf( _SC_OPEN_MAX );
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#elif defined( HAVE_GETDTABLESIZE )
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tblsize = getdtablesize();
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#else
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tblsize = FD_SETSIZE;
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#endif /* !USE_SYSCONF */
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#ifdef FD_SETSIZE
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if( tblsize > FD_SETSIZE )
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tblsize = FD_SETSIZE;
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#endif /* FD_SETSIZE*/
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ldap_int_tblsize = tblsize;
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}
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int
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do_ldap_select( LDAP *ld, struct timeval *timeout )
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{
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struct selectinfo *sip;
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Debug( LDAP_DEBUG_TRACE, "do_ldap_select\n", 0, 0, 0 );
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if ( ldap_int_tblsize == 0 )
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ldap_int_ip_init();
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sip = (struct selectinfo *)ld->ld_selectinfo;
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sip->si_use_readfds = sip->si_readfds;
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sip->si_use_writefds = sip->si_writefds;
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return( select( ldap_int_tblsize,
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&sip->si_use_readfds, &sip->si_use_writefds,
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NULL, timeout ));
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}
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