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openldap/libraries/libldap/os-ip.c
Quanah Gibson-Mount f6ad222e41 Happy New Year!
2020-01-09 16:50:21 +00:00

1148 lines
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/* os-ip.c -- platform-specific TCP & UDP related code */
/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
* Copyright 1998-2020 The OpenLDAP Foundation.
* Portions Copyright 1999 Lars Uffmann.
* 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) 1995 Regents of the University of Michigan.
* All rights reserved.
*/
/* Significant additional contributors include:
* Lars Uffman
*/
#include "portable.h"
#include <stdio.h>
#include <ac/stdlib.h>
#include <ac/errno.h>
#include <ac/socket.h>
#include <ac/string.h>
#include <ac/time.h>
#include <ac/unistd.h>
#ifdef HAVE_IO_H
#include <io.h>
#endif /* HAVE_IO_H */
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
#include "ldap-int.h"
#if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP )
# ifdef LDAP_PF_INET6
int ldap_int_inet4or6 = AF_UNSPEC;
# else
int ldap_int_inet4or6 = AF_INET;
# endif
#endif
static void
ldap_pvt_set_errno(int err)
{
sock_errset(err);
}
int
ldap_int_timeval_dup( struct timeval **dest, const struct timeval *src )
{
struct timeval *new;
assert( dest != NULL );
if (src == NULL) {
*dest = NULL;
return 0;
}
new = (struct timeval *) LDAP_MALLOC(sizeof(struct timeval));
if( new == NULL ) {
*dest = NULL;
return 1;
}
AC_MEMCPY( (char *) new, (const char *) src, sizeof(struct timeval));
*dest = new;
return 0;
}
static int
ldap_pvt_ndelay_on(LDAP *ld, int fd)
{
Debug1(LDAP_DEBUG_TRACE, "ldap_ndelay_on: %d\n",fd );
return ber_pvt_socket_set_nonblock( fd, 1 );
}
static int
ldap_pvt_ndelay_off(LDAP *ld, int fd)
{
Debug1(LDAP_DEBUG_TRACE, "ldap_ndelay_off: %d\n",fd );
return ber_pvt_socket_set_nonblock( fd, 0 );
}
static ber_socket_t
ldap_int_socket(LDAP *ld, int family, int type )
{
ber_socket_t s = socket(family, type, 0);
Debug1(LDAP_DEBUG_TRACE, "ldap_new_socket: %d\n",s );
#ifdef FD_CLOEXEC
fcntl(s, F_SETFD, FD_CLOEXEC);
#endif
return ( s );
}
static int
ldap_pvt_close_socket(LDAP *ld, int s)
{
Debug1(LDAP_DEBUG_TRACE, "ldap_close_socket: %d\n",s );
return tcp_close(s);
}
static int
ldap_int_prepare_socket(LDAP *ld, int s, int proto )
{
Debug1(LDAP_DEBUG_TRACE, "ldap_prepare_socket: %d\n", s );
#if defined( SO_KEEPALIVE ) || defined( TCP_NODELAY )
if ( proto == LDAP_PROTO_TCP ) {
int dummy = 1;
#ifdef SO_KEEPALIVE
if ( setsockopt( s, SOL_SOCKET, SO_KEEPALIVE,
(char*) &dummy, sizeof(dummy) ) == AC_SOCKET_ERROR )
{
Debug1(LDAP_DEBUG_TRACE, "ldap_prepare_socket: "
"setsockopt(%d, SO_KEEPALIVE) failed (ignored).\n",
s );
}
if ( ld->ld_options.ldo_keepalive_idle > 0 )
{
#ifdef TCP_KEEPIDLE
if ( setsockopt( s, IPPROTO_TCP, TCP_KEEPIDLE,
(void*) &ld->ld_options.ldo_keepalive_idle,
sizeof(ld->ld_options.ldo_keepalive_idle) ) == AC_SOCKET_ERROR )
{
Debug1(LDAP_DEBUG_TRACE,
"ldap_prepare_socket: "
"setsockopt(%d, TCP_KEEPIDLE) failed (ignored).\n",
s );
}
#else
Debug0(LDAP_DEBUG_TRACE, "ldap_prepare_socket: "
"sockopt TCP_KEEPIDLE not supported on this system.\n" );
#endif /* TCP_KEEPIDLE */
}
if ( ld->ld_options.ldo_keepalive_probes > 0 )
{
#ifdef TCP_KEEPCNT
if ( setsockopt( s, IPPROTO_TCP, TCP_KEEPCNT,
(void*) &ld->ld_options.ldo_keepalive_probes,
sizeof(ld->ld_options.ldo_keepalive_probes) ) == AC_SOCKET_ERROR )
{
Debug1(LDAP_DEBUG_TRACE,
"ldap_prepare_socket: "
"setsockopt(%d, TCP_KEEPCNT) failed (ignored).\n",
s );
}
#else
Debug0(LDAP_DEBUG_TRACE, "ldap_prepare_socket: "
"sockopt TCP_KEEPCNT not supported on this system.\n" );
#endif /* TCP_KEEPCNT */
}
if ( ld->ld_options.ldo_keepalive_interval > 0 )
{
#ifdef TCP_KEEPINTVL
if ( setsockopt( s, IPPROTO_TCP, TCP_KEEPINTVL,
(void*) &ld->ld_options.ldo_keepalive_interval,
sizeof(ld->ld_options.ldo_keepalive_interval) ) == AC_SOCKET_ERROR )
{
Debug1(LDAP_DEBUG_TRACE,
"ldap_prepare_socket: "
"setsockopt(%d, TCP_KEEPINTVL) failed (ignored).\n",
s );
}
#else
Debug0(LDAP_DEBUG_TRACE, "ldap_prepare_socket: "
"sockopt TCP_KEEPINTVL not supported on this system.\n" );
#endif /* TCP_KEEPINTVL */
}
#endif /* SO_KEEPALIVE */
#ifdef TCP_NODELAY
if ( setsockopt( s, IPPROTO_TCP, TCP_NODELAY,
(char*) &dummy, sizeof(dummy) ) == AC_SOCKET_ERROR )
{
Debug1(LDAP_DEBUG_TRACE, "ldap_prepare_socket: "
"setsockopt(%d, TCP_NODELAY) failed (ignored).\n",
s );
}
#endif /* TCP_NODELAY */
}
#endif /* SO_KEEPALIVE || TCP_NODELAY */
return 0;
}
#ifndef HAVE_WINSOCK
#undef TRACE
#define TRACE do { \
Debug3(LDAP_DEBUG_TRACE, "ldap_is_socket_ready: error on socket %d: errno: %d (%s)\n", \
s, \
errno, \
sock_errstr(errno) ); \
} while( 0 )
/*
* check the socket for errors after select returned.
*/
static int
ldap_pvt_is_socket_ready(LDAP *ld, int s)
{
Debug1(LDAP_DEBUG_TRACE, "ldap_is_sock_ready: %d\n",s );
#if defined( notyet ) /* && defined( SO_ERROR ) */
{
int so_errno;
ber_socklen_t dummy = sizeof(so_errno);
if ( getsockopt( s, SOL_SOCKET, SO_ERROR, &so_errno, &dummy )
== AC_SOCKET_ERROR )
{
return -1;
}
if ( so_errno ) {
ldap_pvt_set_errno(so_errno);
TRACE;
return -1;
}
return 0;
}
#else
{
/* error slippery */
#ifdef LDAP_PF_INET6
struct sockaddr_storage sin;
#else
struct sockaddr_in sin;
#endif
char ch;
ber_socklen_t dummy = sizeof(sin);
if ( getpeername( s, (struct sockaddr *) &sin, &dummy )
== AC_SOCKET_ERROR )
{
/* XXX: needs to be replace with ber_stream_read() */
(void)read(s, &ch, 1);
TRACE;
return -1;
}
return 0;
}
#endif
return -1;
}
#undef TRACE
#endif /* HAVE_WINSOCK */
/* NOTE: this is identical to analogous code in os-local.c */
int
ldap_int_poll(
LDAP *ld,
ber_socket_t s,
struct timeval *tvp,
int wr )
{
int rc;
Debug2(LDAP_DEBUG_TRACE, "ldap_int_poll: fd: %d tm: %ld\n",
s, tvp ? tvp->tv_sec : -1L );
#ifdef HAVE_POLL
{
struct pollfd fd;
int timeout = INFTIM;
short event = wr ? POLL_WRITE : POLL_READ;
fd.fd = s;
fd.events = event;
if ( tvp != NULL ) {
timeout = TV2MILLISEC( tvp );
}
do {
fd.revents = 0;
rc = poll( &fd, 1, timeout );
} while ( rc == AC_SOCKET_ERROR && errno == EINTR &&
LDAP_BOOL_GET( &ld->ld_options, LDAP_BOOL_RESTART ) );
if ( rc == AC_SOCKET_ERROR ) {
return rc;
}
if ( timeout == 0 && rc == 0 ) {
return -2;
}
if ( fd.revents & event ) {
if ( ldap_pvt_is_socket_ready( ld, s ) == -1 ) {
return -1;
}
if ( ldap_pvt_ndelay_off( ld, s ) == -1 ) {
return -1;
}
return 0;
}
}
#else
{
fd_set wfds, *z = NULL;
#ifdef HAVE_WINSOCK
fd_set efds;
#endif
struct timeval tv = { 0 };
#if defined( FD_SETSIZE ) && !defined( HAVE_WINSOCK )
if ( s >= FD_SETSIZE ) {
rc = AC_SOCKET_ERROR;
tcp_close( s );
ldap_pvt_set_errno( EMFILE );
return rc;
}
#endif
if ( tvp != NULL ) {
tv = *tvp;
}
do {
FD_ZERO(&wfds);
FD_SET(s, &wfds );
#ifdef HAVE_WINSOCK
FD_ZERO(&efds);
FD_SET(s, &efds );
#endif
rc = select( ldap_int_tblsize, z, &wfds,
#ifdef HAVE_WINSOCK
&efds,
#else
z,
#endif
tvp ? &tv : NULL );
} while ( rc == AC_SOCKET_ERROR && errno == EINTR &&
LDAP_BOOL_GET( &ld->ld_options, LDAP_BOOL_RESTART ) );
if ( rc == AC_SOCKET_ERROR ) {
return rc;
}
if ( rc == 0 && tvp && tvp->tv_sec == 0 && tvp->tv_usec == 0 ) {
return -2;
}
#ifdef HAVE_WINSOCK
/* This means the connection failed */
if ( FD_ISSET(s, &efds) ) {
int so_errno;
ber_socklen_t dummy = sizeof(so_errno);
if ( getsockopt( s, SOL_SOCKET, SO_ERROR,
(char *) &so_errno, &dummy ) == AC_SOCKET_ERROR || !so_errno )
{
/* impossible */
so_errno = WSAGetLastError();
}
ldap_pvt_set_errno( so_errno );
Debug3(LDAP_DEBUG_TRACE,
"ldap_int_poll: error on socket %d: "
"errno: %d (%s)\n", s, errno, sock_errstr( errno ));
return -1;
}
#endif
if ( FD_ISSET(s, &wfds) ) {
#ifndef HAVE_WINSOCK
if ( ldap_pvt_is_socket_ready( ld, s ) == -1 ) {
return -1;
}
#endif
if ( ldap_pvt_ndelay_off(ld, s) == -1 ) {
return -1;
}
return 0;
}
}
#endif
Debug0(LDAP_DEBUG_TRACE, "ldap_int_poll: timed out\n" );
ldap_pvt_set_errno( ETIMEDOUT );
return -1;
}
static int
ldap_pvt_connect(LDAP *ld, ber_socket_t s,
struct sockaddr *sin, ber_socklen_t addrlen,
int async)
{
int rc, err;
struct timeval tv, *opt_tv = NULL;
#ifdef LDAP_CONNECTIONLESS
/* We could do a connect() but that would interfere with
* attempts to poll a broadcast address
*/
if (LDAP_IS_UDP(ld)) {
if (ld->ld_options.ldo_peer)
ldap_memfree(ld->ld_options.ldo_peer);
ld->ld_options.ldo_peer=ldap_memcalloc(1, sizeof(struct sockaddr_storage));
AC_MEMCPY(ld->ld_options.ldo_peer,sin,addrlen);
return ( 0 );
}
#endif
if ( ld->ld_options.ldo_tm_net.tv_sec >= 0 ) {
tv = ld->ld_options.ldo_tm_net;
opt_tv = &tv;
}
Debug3(LDAP_DEBUG_TRACE,
"ldap_pvt_connect: fd: %d tm: %ld async: %d\n",
s, opt_tv ? tv.tv_sec : -1L, async);
if ( opt_tv && ldap_pvt_ndelay_on(ld, s) == -1 )
return ( -1 );
do{
Debug0(LDAP_DEBUG_TRACE, "attempting to connect: \n" );
if ( connect(s, sin, addrlen) != AC_SOCKET_ERROR ) {
Debug0(LDAP_DEBUG_TRACE, "connect success\n" );
if ( !async && opt_tv && ldap_pvt_ndelay_off(ld, s) == -1 )
return ( -1 );
return ( 0 );
}
err = sock_errno();
Debug1(LDAP_DEBUG_TRACE, "connect errno: %d\n", err );
} while(err == EINTR &&
LDAP_BOOL_GET( &ld->ld_options, LDAP_BOOL_RESTART ));
if ( err != EINPROGRESS && err != EWOULDBLOCK ) {
return ( -1 );
}
if ( async ) {
/* caller will call ldap_int_poll() as appropriate? */
return ( -2 );
}
rc = ldap_int_poll( ld, s, opt_tv, 1 );
Debug1(LDAP_DEBUG_TRACE, "ldap_pvt_connect: %d\n", rc );
return rc;
}
#ifndef HAVE_INET_ATON
int
ldap_pvt_inet_aton( const char *host, struct in_addr *in)
{
unsigned long u = inet_addr( host );
#ifdef INADDR_NONE
if ( u == INADDR_NONE ) return 0;
#endif
if ( u == 0xffffffffUL || u == (unsigned long) -1L ) return 0;
in->s_addr = u;
return 1;
}
#endif
int
ldap_int_connect_cbs(LDAP *ld, Sockbuf *sb, ber_socket_t *s, LDAPURLDesc *srv, struct sockaddr *addr)
{
struct ldapoptions *lo;
ldaplist *ll;
ldap_conncb *cb;
int rc;
ber_sockbuf_ctrl( sb, LBER_SB_OPT_SET_FD, s );
/* Invoke all handle-specific callbacks first */
lo = &ld->ld_options;
for (ll = lo->ldo_conn_cbs; ll; ll = ll->ll_next) {
cb = ll->ll_data;
rc = cb->lc_add( ld, sb, srv, addr, cb );
/* on any failure, call the teardown functions for anything
* that previously succeeded
*/
if ( rc ) {
ldaplist *l2;
for (l2 = lo->ldo_conn_cbs; l2 != ll; l2 = l2->ll_next) {
cb = l2->ll_data;
cb->lc_del( ld, sb, cb );
}
/* a failure might have implicitly closed the fd */
ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, s );
return rc;
}
}
lo = LDAP_INT_GLOBAL_OPT();
for (ll = lo->ldo_conn_cbs; ll; ll = ll->ll_next) {
cb = ll->ll_data;
rc = cb->lc_add( ld, sb, srv, addr, cb );
if ( rc ) {
ldaplist *l2;
for (l2 = lo->ldo_conn_cbs; l2 != ll; l2 = l2->ll_next) {
cb = l2->ll_data;
cb->lc_del( ld, sb, cb );
}
lo = &ld->ld_options;
for (l2 = lo->ldo_conn_cbs; l2; l2 = l2->ll_next) {
cb = l2->ll_data;
cb->lc_del( ld, sb, cb );
}
ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, s );
return rc;
}
}
return 0;
}
int
ldap_connect_to_host(LDAP *ld, Sockbuf *sb,
int proto, LDAPURLDesc *srv,
int async )
{
int rc;
int socktype, port;
ber_socket_t s = AC_SOCKET_INVALID;
char *host;
#if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP )
char serv[7];
int err;
struct addrinfo hints, *res, *sai;
#else
int i;
int use_hp = 0;
struct hostent *hp = NULL;
struct hostent he_buf;
struct in_addr in;
char *ha_buf=NULL;
#endif
if ( srv->lud_host == NULL || *srv->lud_host == 0 ) {
host = "localhost";
} else {
host = srv->lud_host;
}
port = srv->lud_port;
if( !port ) {
if( strcmp(srv->lud_scheme, "ldaps") == 0 ) {
port = LDAPS_PORT;
} else {
port = LDAP_PORT;
}
}
switch(proto) {
case LDAP_PROTO_TCP: socktype = SOCK_STREAM;
Debug2(LDAP_DEBUG_TRACE, "ldap_connect_to_host: TCP %s:%d\n",
host, port );
break;
case LDAP_PROTO_UDP: socktype = SOCK_DGRAM;
Debug2(LDAP_DEBUG_TRACE, "ldap_connect_to_host: UDP %s:%d\n",
host, port );
break;
default:
Debug1(LDAP_DEBUG_TRACE,
"ldap_connect_to_host: unknown proto: %d\n",
proto );
return -1;
}
#if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP )
memset( &hints, '\0', sizeof(hints) );
#ifdef USE_AI_ADDRCONFIG /* FIXME: configure test needed */
/* Use AI_ADDRCONFIG only on systems where its known to be needed. */
hints.ai_flags = AI_ADDRCONFIG;
#endif
hints.ai_family = ldap_int_inet4or6;
hints.ai_socktype = socktype;
snprintf(serv, sizeof serv, "%d", port );
/* most getaddrinfo(3) use non-threadsafe resolver libraries */
LDAP_MUTEX_LOCK(&ldap_int_resolv_mutex);
err = getaddrinfo( host, serv, &hints, &res );
LDAP_MUTEX_UNLOCK(&ldap_int_resolv_mutex);
if ( err != 0 ) {
Debug1(LDAP_DEBUG_TRACE,
"ldap_connect_to_host: getaddrinfo failed: %s\n",
AC_GAI_STRERROR(err) );
return -1;
}
rc = -1;
for( sai=res; sai != NULL; sai=sai->ai_next) {
if( sai->ai_addr == NULL ) {
Debug0(LDAP_DEBUG_TRACE,
"ldap_connect_to_host: getaddrinfo "
"ai_addr is NULL?\n" );
continue;
}
#ifndef LDAP_PF_INET6
if ( sai->ai_family == AF_INET6 ) continue;
#endif
/* we assume AF_x and PF_x are equal for all x */
s = ldap_int_socket( ld, sai->ai_family, socktype );
if ( s == AC_SOCKET_INVALID ) {
continue;
}
if ( ldap_int_prepare_socket(ld, s, proto ) == -1 ) {
ldap_pvt_close_socket(ld, s);
break;
}
switch (sai->ai_family) {
#ifdef LDAP_PF_INET6
case AF_INET6: {
char addr[INET6_ADDRSTRLEN];
inet_ntop( AF_INET6,
&((struct sockaddr_in6 *)sai->ai_addr)->sin6_addr,
addr, sizeof addr);
Debug2(LDAP_DEBUG_TRACE,
"ldap_connect_to_host: Trying %s %s\n",
addr, serv );
} break;
#endif
case AF_INET: {
char addr[INET_ADDRSTRLEN];
inet_ntop( AF_INET,
&((struct sockaddr_in *)sai->ai_addr)->sin_addr,
addr, sizeof addr);
Debug2(LDAP_DEBUG_TRACE,
"ldap_connect_to_host: Trying %s:%s\n",
addr, serv );
} break;
}
rc = ldap_pvt_connect( ld, s,
sai->ai_addr, sai->ai_addrlen, async );
if ( rc == 0 || rc == -2 ) {
err = ldap_int_connect_cbs( ld, sb, &s, srv, sai->ai_addr );
if ( err )
rc = err;
else
break;
}
ldap_pvt_close_socket(ld, s);
}
freeaddrinfo(res);
#else
if (! inet_aton( host, &in ) ) {
int local_h_errno;
rc = ldap_pvt_gethostbyname_a( host, &he_buf, &ha_buf,
&hp, &local_h_errno );
if ( (rc < 0) || (hp == NULL) ) {
#ifdef HAVE_WINSOCK
ldap_pvt_set_errno( WSAGetLastError() );
#else
/* not exactly right, but... */
ldap_pvt_set_errno( EHOSTUNREACH );
#endif
if (ha_buf) LDAP_FREE(ha_buf);
return -1;
}
use_hp = 1;
}
rc = s = -1;
for ( i = 0; !use_hp || (hp->h_addr_list[i] != 0); ++i, rc = -1 ) {
struct sockaddr_in sin;
s = ldap_int_socket( ld, PF_INET, socktype );
if ( s == AC_SOCKET_INVALID ) {
/* use_hp ? continue : break; */
break;
}
if ( ldap_int_prepare_socket( ld, s, proto ) == -1 ) {
ldap_pvt_close_socket(ld, s);
break;
}
(void)memset((char *)&sin, '\0', sizeof sin);
sin.sin_family = AF_INET;
sin.sin_port = htons((unsigned short) port);
if( use_hp ) {
AC_MEMCPY( &sin.sin_addr, hp->h_addr_list[i],
sizeof(sin.sin_addr) );
} else {
AC_MEMCPY( &sin.sin_addr, &in.s_addr,
sizeof(sin.sin_addr) );
}
#ifdef HAVE_INET_NTOA_B
{
/* for VxWorks */
char address[INET_ADDR_LEN];
inet_ntoa_b(sin.sin_address, address);
Debug2(LDAP_DEBUG_TRACE,
"ldap_connect_to_host: Trying %s:%d\n",
address, port );
}
#else
Debug2(LDAP_DEBUG_TRACE,
"ldap_connect_to_host: Trying %s:%d\n",
inet_ntoa(sin.sin_addr), port );
#endif
rc = ldap_pvt_connect(ld, s,
(struct sockaddr *)&sin, sizeof(sin),
async);
if ( (rc == 0) || (rc == -2) ) {
int err = ldap_int_connect_cbs( ld, sb, &s, srv, (struct sockaddr *)&sin );
if ( err )
rc = err;
else
break;
}
ldap_pvt_close_socket(ld, s);
if (!use_hp) break;
}
if (ha_buf) LDAP_FREE(ha_buf);
#endif
return rc;
}
#if defined( HAVE_CYRUS_SASL )
char *
ldap_host_connected_to( Sockbuf *sb, const char *host )
{
ber_socklen_t len;
#ifdef LDAP_PF_INET6
struct sockaddr_storage sabuf;
#else
struct sockaddr sabuf;
#endif
struct sockaddr *sa = (struct sockaddr *) &sabuf;
ber_socket_t sd;
(void)memset( (char *)sa, '\0', sizeof sabuf );
len = sizeof sabuf;
ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
if ( getpeername( sd, sa, &len ) == -1 ) {
return( NULL );
}
/*
* do a reverse lookup on the addr to get the official hostname.
* this is necessary for kerberos to work right, since the official
* hostname is used as the kerberos instance.
*/
switch (sa->sa_family) {
#ifdef LDAP_PF_LOCAL
case AF_LOCAL:
return LDAP_STRDUP( ldap_int_hostname );
#endif
#ifdef LDAP_PF_INET6
case AF_INET6:
{
struct in6_addr localhost = IN6ADDR_LOOPBACK_INIT;
if( memcmp ( &((struct sockaddr_in6 *)sa)->sin6_addr,
&localhost, sizeof(localhost)) == 0 )
{
return LDAP_STRDUP( ldap_int_hostname );
}
}
break;
#endif
case AF_INET:
{
struct in_addr localhost;
localhost.s_addr = htonl( INADDR_ANY );
if( memcmp ( &((struct sockaddr_in *)sa)->sin_addr,
&localhost, sizeof(localhost) ) == 0 )
{
return LDAP_STRDUP( ldap_int_hostname );
}
#ifdef INADDR_LOOPBACK
localhost.s_addr = htonl( INADDR_LOOPBACK );
if( memcmp ( &((struct sockaddr_in *)sa)->sin_addr,
&localhost, sizeof(localhost) ) == 0 )
{
return LDAP_STRDUP( ldap_int_hostname );
}
#endif
}
break;
default:
return( NULL );
break;
}
{
char *herr;
#ifdef NI_MAXHOST
char hbuf[NI_MAXHOST];
#elif defined( MAXHOSTNAMELEN )
char hbuf[MAXHOSTNAMELEN];
#else
char hbuf[256];
#endif
hbuf[0] = 0;
if (ldap_pvt_get_hname( sa, len, hbuf, sizeof(hbuf), &herr ) == 0
&& hbuf[0] )
{
return LDAP_STRDUP( hbuf );
}
}
return host ? LDAP_STRDUP( host ) : NULL;
}
#endif
struct selectinfo {
#ifdef HAVE_POLL
/* for UNIX poll(2) */
int si_maxfd;
struct pollfd si_fds[FD_SETSIZE];
#else
/* for UNIX select(2) */
fd_set si_readfds;
fd_set si_writefds;
fd_set si_use_readfds;
fd_set si_use_writefds;
#endif
};
void
ldap_mark_select_write( LDAP *ld, Sockbuf *sb )
{
struct selectinfo *sip;
ber_socket_t sd;
sip = (struct selectinfo *)ld->ld_selectinfo;
ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
#ifdef HAVE_POLL
/* for UNIX poll(2) */
{
int empty=-1;
int i;
for(i=0; i < sip->si_maxfd; i++) {
if( sip->si_fds[i].fd == sd ) {
sip->si_fds[i].events |= POLL_WRITE;
return;
}
if( empty==-1 && sip->si_fds[i].fd == -1 ) {
empty=i;
}
}
if( empty == -1 ) {
if( sip->si_maxfd >= FD_SETSIZE ) {
/* FIXME */
return;
}
empty = sip->si_maxfd++;
}
sip->si_fds[empty].fd = sd;
sip->si_fds[empty].events = POLL_WRITE;
}
#else
/* for UNIX select(2) */
if ( !FD_ISSET( sd, &sip->si_writefds )) {
FD_SET( sd, &sip->si_writefds );
}
#endif
}
void
ldap_mark_select_read( LDAP *ld, Sockbuf *sb )
{
struct selectinfo *sip;
ber_socket_t sd;
sip = (struct selectinfo *)ld->ld_selectinfo;
ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
#ifdef HAVE_POLL
/* for UNIX poll(2) */
{
int empty=-1;
int i;
for(i=0; i < sip->si_maxfd; i++) {
if( sip->si_fds[i].fd == sd ) {
sip->si_fds[i].events |= POLL_READ;
return;
}
if( empty==-1 && sip->si_fds[i].fd == -1 ) {
empty=i;
}
}
if( empty == -1 ) {
if( sip->si_maxfd >= FD_SETSIZE ) {
/* FIXME */
return;
}
empty = sip->si_maxfd++;
}
sip->si_fds[empty].fd = sd;
sip->si_fds[empty].events = POLL_READ;
}
#else
/* for UNIX select(2) */
if ( !FD_ISSET( sd, &sip->si_readfds )) {
FD_SET( sd, &sip->si_readfds );
}
#endif
}
void
ldap_mark_select_clear( LDAP *ld, Sockbuf *sb )
{
struct selectinfo *sip;
ber_socket_t sd;
sip = (struct selectinfo *)ld->ld_selectinfo;
ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
#ifdef HAVE_POLL
/* for UNIX poll(2) */
{
int i;
for(i=0; i < sip->si_maxfd; i++) {
if( sip->si_fds[i].fd == sd ) {
sip->si_fds[i].fd = -1;
}
}
}
#else
/* for UNIX select(2) */
FD_CLR( sd, &sip->si_writefds );
FD_CLR( sd, &sip->si_readfds );
#endif
}
void
ldap_clear_select_write( LDAP *ld, Sockbuf *sb )
{
struct selectinfo *sip;
ber_socket_t sd;
sip = (struct selectinfo *)ld->ld_selectinfo;
ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
#ifdef HAVE_POLL
/* for UNIX poll(2) */
{
int i;
for(i=0; i < sip->si_maxfd; i++) {
if( sip->si_fds[i].fd == sd ) {
sip->si_fds[i].events &= ~POLL_WRITE;
}
}
}
#else
/* for UNIX select(2) */
FD_CLR( sd, &sip->si_writefds );
#endif
}
int
ldap_is_write_ready( LDAP *ld, Sockbuf *sb )
{
struct selectinfo *sip;
ber_socket_t sd;
sip = (struct selectinfo *)ld->ld_selectinfo;
ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
#ifdef HAVE_POLL
/* for UNIX poll(2) */
{
int i;
for(i=0; i < sip->si_maxfd; i++) {
if( sip->si_fds[i].fd == sd ) {
return sip->si_fds[i].revents & POLL_WRITE;
}
}
return 0;
}
#else
/* for UNIX select(2) */
return( FD_ISSET( sd, &sip->si_use_writefds ));
#endif
}
int
ldap_is_read_ready( LDAP *ld, Sockbuf *sb )
{
struct selectinfo *sip;
ber_socket_t sd;
sip = (struct selectinfo *)ld->ld_selectinfo;
if (ber_sockbuf_ctrl( sb, LBER_SB_OPT_DATA_READY, NULL ))
return 1;
ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
#ifdef HAVE_POLL
/* for UNIX poll(2) */
{
int i;
for(i=0; i < sip->si_maxfd; i++) {
if( sip->si_fds[i].fd == sd ) {
return sip->si_fds[i].revents & POLL_READ;
}
}
return 0;
}
#else
/* for UNIX select(2) */
return( FD_ISSET( sd, &sip->si_use_readfds ));
#endif
}
void *
ldap_new_select_info( void )
{
struct selectinfo *sip;
sip = (struct selectinfo *)LDAP_CALLOC( 1, sizeof( struct selectinfo ));
if ( sip == NULL ) return NULL;
#ifdef HAVE_POLL
/* for UNIX poll(2) */
/* sip->si_maxfd=0 */
#else
/* for UNIX select(2) */
FD_ZERO( &sip->si_readfds );
FD_ZERO( &sip->si_writefds );
#endif
return( (void *)sip );
}
void
ldap_free_select_info( void *sip )
{
LDAP_FREE( sip );
}
#ifndef HAVE_POLL
int ldap_int_tblsize = 0;
void
ldap_int_ip_init( void )
{
#if defined( HAVE_SYSCONF )
long tblsize = sysconf( _SC_OPEN_MAX );
if( tblsize > INT_MAX ) tblsize = INT_MAX;
#elif defined( HAVE_GETDTABLESIZE )
int tblsize = getdtablesize();
#else
int tblsize = FD_SETSIZE;
#endif /* !USE_SYSCONF */
#ifdef FD_SETSIZE
if( tblsize > FD_SETSIZE ) tblsize = FD_SETSIZE;
#endif /* FD_SETSIZE */
ldap_int_tblsize = tblsize;
}
#endif
int
ldap_int_select( LDAP *ld, struct timeval *timeout )
{
int rc;
struct selectinfo *sip;
Debug0( LDAP_DEBUG_TRACE, "ldap_int_select\n" );
#ifndef HAVE_POLL
if ( ldap_int_tblsize == 0 ) ldap_int_ip_init();
#endif
sip = (struct selectinfo *)ld->ld_selectinfo;
assert( sip != NULL );
#ifdef HAVE_POLL
{
int to = timeout ? TV2MILLISEC( timeout ) : INFTIM;
rc = poll( sip->si_fds, sip->si_maxfd, to );
}
#else
sip->si_use_readfds = sip->si_readfds;
sip->si_use_writefds = sip->si_writefds;
rc = select( ldap_int_tblsize,
&sip->si_use_readfds, &sip->si_use_writefds,
NULL, timeout );
#endif
return rc;
}
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