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4e5ed2dffc
openldap/libraries/liblber/sockbuf.c
Kurt Zeilenga 4e5ed2dffc Changed lc_conn to be a pointer to a BerElement to aid in state management. 
Added validation to exposed opaque data structures (BerElement, Sockbuf,
and LDAP).  Added macros BER_VALID, SOCKBUF_VALID, LDAP_VALID.
Added ber_pvt_ber_bytes() and ber_pvt_ber_remaining() macros to hide
some ber internals.  These really should be handled by ber_get_option().
1999-05-28 19:33:05 +00:00

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/* sockbuf.c - i/o routines with support for adding i/o layers. */
/*
* Copyright 1998-1999 The OpenLDAP Foundation, All Rights Reserved.
* COPYING RESTRICTIONS APPLY, see COPYRIGHT file
*/
#include "portable.h"
#include <stdio.h>
#include <stdlib.h>
#include <ac/ctype.h>
#include <ac/errno.h>
#include <ac/socket.h>
#include <ac/string.h>
#include <ac/unistd.h>
#ifdef HAVE_IO_H
#include <io.h>
#endif /* HAVE_IO_H */
#if defined( HAVE_SYS_FILIO_H )
#include <sys/filio.h>
#elif defined( HAVE_SYS_IOCTL_H )
#include <sys/ioctl.h>
#endif
#include "lber-int.h"
#ifdef LDAP_TEST
#undef TEST_PARTIAL_READ
#undef TEST_PARTIAL_WRITE
#endif
#define MAX_BUF_SIZE 65535
#define MIN_BUF_SIZE 4096
#define sockbuf_io_write( sb, buf, len ) \
((sb)->sb_io->sbi_write( (sb), (buf), (len) ))
#define sockbuf_io_read( sb, buf, len ) \
((sb)->sb_io->sbi_read( (sb), (buf), (len) ))
static long have_no_read( Sockbuf *sb, void *buf, long len );
static long have_no_write( Sockbuf *sb, void *buf, long len );
static int have_no_close( Sockbuf *sb );
static Sockbuf_IO sb_IO_None=
{
NULL, /* sbi_setup */
NULL, /* sbi_release */
have_no_read, /* sbi_read */
have_no_write, /* sbi_write */
have_no_close /* sbi_close */
};
static void
update_status( Sockbuf *sb )
{
assert( sb != NULL );
assert( SOCKBUF_VALID( sb ) );
sb->sb_buf_ready = (sb->sb_buf.buf_ptr < sb->sb_buf.buf_end);
#ifdef USE_SASL
sb->sb_sec_ready = ((sb->sb_sec_buf_in.buf_end!=0) &&
(sb->sb_sec_buf_in.buf_ptr >=
sb->sb_sec_buf_in.buf_end));
#endif
}
#ifdef LDAP_DEBUG
static int
status_is_ok( Sockbuf *sb )
{
int obr;
#ifdef USE_SASL
int osr;
#endif
assert( sb != NULL );
assert( SOCKBUF_VALID( sb ) );
obr = sb->sb_buf_ready;
#ifdef USE_SASL
osr = sb->sb_sec_ready;
#endif
update_status(sb);
if (obr!=sb->sb_buf_ready)
return 0;
#ifdef USE_SASL
if (osr!=sb->sb_sec_ready)
return 0;
#endif
return 1;
}
#endif
#ifdef USE_SASL
static long
packet_length( char *buf )
{
long size;
assert( buf != NULL );
size = (((unsigned long)buf[0])<<24)|
(((unsigned long)buf[1])<<16)|
(((unsigned long)buf[2])<<8)|
(((unsigned long)buf[3]));
if ((size<0) || (size>MAX_BUF_SIZE)) {
/* somebody is trying to mess me up. */
lber_log_printf( LDAP_DEBUG_SASL, sb->sb_debug,
"SASL: received packet length of %d bytes\n",
size );
size = 16; /* this should lead to an error. */
}
return size + 4; /* include the size !!! */
}
#endif
static int
grow_buffer( Sockbuf_Buf * buf, long minsize )
{
long pw;;
assert( buf != NULL );
for( pw=MIN_BUF_SIZE; pw<minsize; pw<<=1 ) {
if (pw > MAX_BUF_SIZE) {
/* this could mean that somebody is trying to crash us. */
return -1;
}
}
minsize = pw;
if (buf->buf_size<minsize) {
if ((buf->buf_base==NULL) || ((buf->buf_end==0) && (buf->buf_ptr==0))) {
/* empty buffer */
if (buf->buf_base!=NULL)
free( buf->buf_base );
assert( buf->buf_ptr==0 );
assert( buf->buf_end==0 );
buf->buf_base = malloc( minsize );
if (buf->buf_base==NULL)
return -1;
} else {
char *nb;
nb = realloc( buf->buf_base, minsize );
if (nb==NULL)
return -1;
buf->buf_base = nb;
}
buf->buf_size = minsize;
}
return 0;
}
#ifdef USE_SASL
static long
sockbuf_sec_release( Sockbuf *sb, char *buf, long len )
{
/* when this is called:
* sb->sb_sec_buf_in.buf_base points to a packet.
* sb->sb_sec_buf_in.buf_ptr contains the total bytes read.
* sb->sb_sec_end.buf_end contains the packet length.
*
* sb->sb_buf.buf_ptr == sb->sb_buf.buf_end == 0;
*/
long rlen;
long total;
char *ptr;
char *end;
long size;
assert( buf != NULL );
assert( sb != NULL );
assert( SOCKBUF_VALID( sb ) );
assert( sb->sb_sec );
assert( sb->sb_sec->sbs_release );
assert( sb->sb_sec_buf_in.sb_ptr >= sb->sb_sec_buf_in.sb_end );
assert( sb->sb_buf.sb_ptr == 0 );
assert( sb->sb_buf.sb_end == 0 );
assert( status_is_ok(sb) );
total = 0;
ptr = sb->sb_sec_buf_in.buf_base;
end = ptr+ sb->sb_sec_buf_in.buf_ptr;
size = sb->sb_sec_buf_in.buf_end;
sb->sb_sec_ready = 1;
for(;(ptr+size<=end);) {
for(;;) {
rlen = sb->sb_sec->sbs_release( sb, ptr, size,
buf, len,
sb->sb_buf.buf_base,
sb->sb_buf.buf_size );
if (rlen==0) {
/* this means a security violation. */
return total; /* total ? total : 0 */
}
if (rlen<0) {
/* this means that the buffer isn't big enough. */
if (grow_buffer( &(sb->sb_buf), -rlen )<0)
/* memory violation. */
return total; /* total ? total : 0 */
continue;
}
/* if (rlen>0) */
break;
}
total+=rlen;
/* move to the next packet... */
ptr+=size;
if (ptr+4<=end)
size = packet_length( ptr );
/* size is always at least 4, so the loop condition is always OK !!*/
assert( size>=4 );
if (rlen<len) {
len-=rlen;
buf+=rlen;
} else {
sb->sb_buf_ready = (sb->sb_buf.buf_end = rlen - len) ? 1 : 0;
break;
}
}
if (ptr+size>end)
sb->sb_sec_ready = 0;
/* clean up the mess. */
if (ptr<end) {
/* copy back to beginning of buffer. */
SAFEMEMCPY( sb->sb_sec_buf_in.buf_base, ptr, end-ptr );
sb->sb_sec_buf_in.buf_ptr = 0;
sb->sb_sec_buf_in.buf_end -= (ptr - sb->sb_sec_buf_in.buf_base);
}
assert( status_is_ok(sb) );
return total;
}
static long
sockbuf_sec_protect( Sockbuf *sb, char *buf, long len )
{
long ret;
long blen;
long total;
assert( buf != NULL );
assert( sb != NULL );
assert( SOCKBUF_VALID( sb ) );
assert( sb->sb_sec_out.buf_end == 0 );
assert( sb->sb_sec_out.buf_ptr == 0 );
assert( sb->sb_sec );
assert( sb->sb_sec->sbs_protect );
assert( status_is_ok(sb) );
total = 0;
for(;(len);) {
for(;;) {
blen = len;
ret = sb->sb_sec->sbs_protect( sb, buf, &blen,
sb->sb_sec_out.buf_base+
sb->sb_sec_out.buf_end,
sb->sb_sec_out.buf_size -
sb->sb_sec_out.buf_end );
if (ret==0)
/* protection error ? */
return total;
if (ret<0) {
if (grow_buffer( &(sb->sb_sec_out),-ret-sb->sb_sec_out.buf_end )<0)
/* memory error */
return total;
continue;
}
/* else if (ret>0) */
break;
}
sb->sb_sec_out.buf_end += ret;
len -= blen;
total += blen;
}
assert( status_is_ok(sb) );
return total;
}
#endif
static long
sockbuf_copy_out( Sockbuf *sb, char **buf, long len )
{
long blen = (sb->sb_buf.buf_end - sb->sb_buf.buf_ptr );
assert( buf != NULL );
assert( sb != NULL );
assert( SOCKBUF_VALID( sb ) );
assert( status_is_ok(sb) );
if (blen) {
long rlen = (blen<len) ? blen : len;
memcpy( *buf, sb->sb_buf.buf_base + sb->sb_buf.buf_ptr, rlen );
sb->sb_buf.buf_ptr+=rlen;
*buf+=rlen;
len -= rlen;
if (sb->sb_buf.buf_ptr >= sb->sb_buf.buf_end) {
sb->sb_buf.buf_ptr = sb->sb_buf.buf_end = 0;
sb->sb_buf_ready = 0;
} else {
sb->sb_buf_ready = 1;
}
}
assert( status_is_ok(sb) );
return len;
}
Sockbuf *ber_sockbuf_alloc( void )
{
Sockbuf *sb = calloc(1, sizeof(Sockbuf));
if( sb == NULL ) return NULL;
ber_pvt_sb_init( sb );
return sb;
}
Sockbuf *ber_sockbuf_alloc_fd( int fd )
{
Sockbuf *sb = ber_sockbuf_alloc();
if( sb == NULL ) return NULL;
ber_pvt_sb_set_desc( sb, fd );
ber_pvt_sb_set_io( sb, &ber_pvt_sb_io_tcp, NULL );
return sb;
}
void ber_sockbuf_free( Sockbuf *sb )
{
assert(sb != NULL);
assert( SOCKBUF_VALID( sb ) );
ber_pvt_sb_destroy( sb );
free(sb);
}
long
ber_pvt_sb_read( Sockbuf *sb, void *buf_arg, long len )
{
char *buf;
long ret;
assert( buf_arg != NULL );
assert( sb != NULL );
assert( SOCKBUF_VALID( sb ) );
assert( status_is_ok(sb) );
#if 0
/* breaks slapd :-< */
assert( ber_pvt_sb_in_use( sb ) );
#endif
#ifdef TEST_PARTIAL_READ
if ((rand() & 3)==1) { /* 1 out of 4 */
errno = EWOULDBLOCK;
return -1;
}
if( len > 0 )
len = (rand() % len)+1;
#endif
buf = (char *) buf_arg;
if (sb->sb_buf.buf_ptr!=sb->sb_buf.buf_end) {
len = sockbuf_copy_out( sb, &buf, len );
if (len==0) {
return (buf - (char *) buf_arg);
}
}
#ifdef USE_SASL
if (sb->sb_sec) {
int max;
assert( sb->sb_sec->sbs_release );
assert( sb->sb_sec_buf_in.buf_base );
if (sb->sb_read_ahead) {
max = sb->sb_sec_buf_in.buf_size - sb->sb_sec_buf_in.buf_ptr;
} else {
max = sb->sb_sec_buf_in.buf_end - sb->sb_sec_buf_in.buf_ptr;
if (max<=0) {
/* special situation. This means that we need to read the first
* four bytes for the packet length.
*/
max += 4;
}
}
for(;;) {
/* read from stream into sb_sec_buf_in */
for(;;) {
ret = sockbuf_io_read( sb, sb->sb_sec_buf_in.buf_base +
sb->sb_sec_buf_in.buf_ptr, max );
#ifdef EINTR
if ((ret<0) && (errno==EINTR))
continue;
#endif
break;
}
if (ret<=0) {
/* read error. return */
goto do_return;
}
sb->sb_sec_buf_in.buf_ptr += ret;
if (sb->sb_sec_buf_in.buf_ptr < sb->sb_sec_buf_in.buf_end) {
/* did not finish a packet. give up. */
goto do_return;
}
if (sb->sb_sec_buf_in.buf_end == 0) {
/* Were trying to read the first four bytes... */
if (sb->sb_sec_buf_in.buf_ptr < 4) {
/* did not read enough for packet length. give up. */
goto do_return;
}
/* calculate the packet length. */
sb->sb_sec_buf_in.buf_end =
packet_length(sb->sb_sec_buf_in.buf_base );
if ((sb->sb_sec_buf_in.buf_end > sb->sb_sec_buf_in.buf_size) &&
(grow_buffer( &(sb->sb_sec_buf_in), sb->sb_sec_buf_in.buf_end)<0)) {
/* buffer has to be to big. exit with error. */
ret = -1;
goto do_return;
}
if (sb->sb_sec_buf_in.buf_ptr >= sb_sec_buf_in.buf_end) {
/* finished packet. decode it. */
goto decode_packet;
}
/* did not finish packet yet. try again ? */
if (sb->sb_read_ahead) {
/* we were trying to read the max anyway. forget it */
goto do_return;
}
}
decode_packet:
/* we read enough for at least 1 packet */
ret = sockbuf_sec_release( sb, buf, len );
if (ret<=0) {
/* something went wrong... */
goto do_return;
}
buf+=ret;
len-=ret;
/* we are finished !!! */
if ((len==0) || (ret!=max))
goto do_return;
}
} else {
#endif
if (sb->sb_read_ahead) {
long max;
max = sb->sb_buf.buf_size - sb->sb_buf.buf_end;
if (max>len) {
for(;;) {
ret = sockbuf_io_read( sb,
sb->sb_buf.buf_base +
sb->sb_buf.buf_end,
max );
#ifdef EINTR
if ((ret<0) && (errno==EINTR))
continue;
#endif
break;
}
if (ret<=0) {
/* some error occured */
goto do_return;
}
sb->sb_buf.buf_end += ret;
/* move out the data... */
len = sockbuf_copy_out( sb, &buf, len );
goto do_return;
}
}
/* no read_ahead, just try to put the data in the buf. */
for(;;) {
ret = sockbuf_io_read( sb, buf, len );
#ifdef EINTR
if ((ret<0) && (errno==EINTR))
continue;
#endif
break;
}
if (ret>0) {
buf+=ret;
len-=ret;
}
/* we might as well return, since there is nothing to do... */
#ifdef USE_SASL
}
#endif
do_return:
assert( status_is_ok(sb) );
if ((ret<=0) && (buf==buf_arg)) {
/* there was an error. */
return ret;
}
return (buf - ((char *) buf_arg));
}
#ifdef USE_SASL
long sockbuf_do_write( Sockbuf *sb )
{
long to_go;
assert( sb != NULL );
assert( SOCKBUF_VALID( sb ) );
to_go = sb->sb_sec_out.buf_end - sb->sb_sec_out.buf_ptr;
assert( to_go > 0 );
/* there is something left of the last time... */
for(;;) {
ret = sockbuf_io_write( sb, sb->sb_sec_out.buf_base+
sb->sb_sec_out.buf_ptr, to_go );
#ifdef EINTR
if ((ret<0) && (errno==EINTR))
continue;
#endif
break;
}
if (ret<=0) /* error */
return ret;
sb->sb_sec_out.buf_ptr += ret;
if (ret<to_go) /* not enough data, so pretend no data was sent. */
return -1;
return ret;
}
#endif
long ber_pvt_sb_write( Sockbuf *sb, void *buf, long len_arg )
{
long ret;
long len = len_arg;
assert( buf != NULL );
assert( sb != NULL );
assert( SOCKBUF_VALID( sb ) );
assert( status_is_ok(sb) );
#if 0
/* unfortunately breaks slapd */
assert( ber_pvt_sb_in_use( sb ) );
#endif
#ifdef TEST_PARTIAL_WRITE
if ((rand() & 3)==1) { /* 1 out of 4 */
errno = EWOULDBLOCK;
return -1;
}
len_arg = (rand() % len_arg)+1;
len = len_arg;
#endif
#ifdef USE_SASL
if (sb->sb_sec) {
assert( sb->sb_sec_prev_len <= len );
if (sb->sb_sec_prev_len) {
ret = sockbuf_do_write( sb );
if (ret<=0)
return ret;
/* finished. */
len -= sb->sb_sec_prev_len;
sb->sb_sec_prev_len = 0;
sb->sb_sec_out.buf_end = sb->sb_sec_out.buf_ptr = 0;
}
/* now protect the next packet. */
ret = sockbuf_sec_protect( sb, buf, len );
if (ret<=0)
return ret;
ret = sockbuf_do_write( sb );
if (ret<=0) {
sb->sb_sec_prev_len = len;
return ret;
}
return len_arg;
} else {
#endif
for(;;) {
ret = sockbuf_io_write( sb, buf, len );
#ifdef EINTR
if ((ret<0) && (errno==EINTR))
continue;
#endif
break;
}
#ifdef USE_SASL
}
#endif
return ret;
}
int ber_pvt_sb_close( Sockbuf *sb )
{
int ret;
assert( sb != NULL );
assert( SOCKBUF_VALID( sb ) );
assert( sb->sb_io );
assert( sb->sb_io->sbi_close );
assert( status_is_ok(sb) );
assert( ber_pvt_sb_in_use( sb ) );
ret = sb->sb_io->sbi_close( sb );
ber_pvt_sb_set_desc( sb, -1 );
return ret;
}
int ber_pvt_sb_set_readahead( Sockbuf *sb, int rh )
{
assert( sb != NULL );
assert( SOCKBUF_VALID( sb ) );
assert( status_is_ok(sb) );
sb->sb_read_ahead = (rh!=0);
return 0;
}
#define USE_NONBLOCK
#ifdef USE_NONBLOCK
int ber_pvt_sb_set_nonblock( Sockbuf *sb, int nb )
{
assert( sb != NULL );
assert( SOCKBUF_VALID( sb ) );
assert( status_is_ok(sb) );
if (nb) {
sb->sb_non_block = 1;
#if 0
sb->sb_read_ahead = 1;
#endif
} else {
sb->sb_non_block = 0;
#if 0
sb->sb_read_ahead = 0;
#endif
}
if (ber_pvt_sb_in_use(sb)) {
#if HAVE_FCNTL
int flags = fcntl(ber_pvt_sb_get_desc(sb), F_GETFL);
flags |= O_NONBLOCK;
return fcntl(ber_pvt_sb_get_desc(sb), F_SETFL, flags);
#elif defined( FIONBIO )
/* WINSOCK requires the status to be a long */
ioctl_t status = (nb!=0);
return ioctl( ber_pvt_sb_get_desc(sb), FIONBIO, &status );
#endif /* FIONBIO */
}
return 0;
}
#endif
#define sockbuf_buf_init( bb ) do { \
Sockbuf_Buf *sbb = (bb); \
sbb->buf_base = NULL; \
sbb->buf_ptr = 0; \
sbb->buf_end = 0; \
sbb->buf_size = 0; \
} while(0)
static int
sockbuf_buf_destroy( Sockbuf_Buf *buf )
{
assert( buf != NULL);
if (buf->buf_base)
free( buf->buf_base );
sockbuf_buf_init( buf );
return 0;
}
int ber_pvt_sb_init( Sockbuf *sb )
{
assert( sb != NULL);
sb->sb_valid=LBER_VALID_SOCKBUF;
sb->sb_options = 0;
sb->sb_debug = 0;
sb->sb_trans_ready = 0;
sb->sb_buf_ready = 0;
#ifdef USE_SASL
sb->sb_sec_ready = 0;
#endif
sb->sb_read_ahead = 0;
sb->sb_non_block = 0;
sb->sb_fd = -1;
sb->sb_iodata = NULL;
sb->sb_io = &sb_IO_None;
sb->sb_sd = -1;
#ifdef DEADWOOD
sb->sb_max_incoming = 0;
#endif
sockbuf_buf_init( &(sb->sb_buf) );
#ifdef USE_SASL
sockbuf_buf_init( &(sb->sb_sec_buf_in) );
sockbuf_buf_init( &(sb->sb_sec_buf_out) );
sb->sb_sdata = NULL;
sb->sb_sec = NULL;
sb->sb_sec_prev_len = 0;
#endif
assert( SOCKBUF_VALID( sb ) );
return 0;
}
int ber_pvt_sb_destroy( Sockbuf *sb )
{
assert( sb != NULL);
assert( SOCKBUF_VALID(sb) );
#ifdef USE_SASL
ber_pvt_sb_clear_sec(sb);
sockbuf_buf_destroy( &(sb->sb_sec_buf_in) );
sockbuf_buf_destroy( &(sb->sb_sec_buf_out) );
#endif
ber_pvt_sb_clear_io(sb);
sockbuf_buf_destroy( &(sb->sb_buf) );
return ber_pvt_sb_init( sb );
}
#ifdef USE_SASL
int ber_pvt_sb_set_sec( Sockbuf *sb, Sockbuf_Sec * sec, void *arg )
{
int len;
assert( sb != NULL);
assert( SOCKBUF_VALID( *sb ) );
if ((sb->sb_sec) || (sec==NULL))
return -1;
sb->sb_sec = sec;
if ((sec->sbs_setup) && (sec->sbs_setup( sb, arg)<0)) {
return -1;
}
len = sb->sb_buf.buf_end - sb->sb_buf.buf_ptr;
if (len>0) {
/* move this to the security layer. */
if (grow_buffer( &(sb->sb_sec_buf_in), len )<0)
return -1;
memcpy( sb->sb_sec_buf_in.buf_base,
sb->sb_buf.buf_base + sb->sb_buf.buf_ptr, len );
sb->sb_sec_buf_in.buf_ptr = len;
sb->sb_sec_buf_in.buf_end = (len>4) ? packet_length( sb->sb_sec_buf_in ) : 0;
sb->sb_buf.buf_ptr = sb->sb_buf.buf_end = 0;
}
update_status();
return 0;
}
int ber_pvt_sb_clear_sec( Sockbuf *sb )
{
assert( sb != NULL);
assert( SOCKBUF_VALID( sb ) );
if (sb->sb_buf.buf_ptr!=0)
return -1;
if (sb->sb_sec==NULL)
return -1;
if ((sb->sb_sec->sbs_remove) && (sb->sb_sec->sbs_remove(sb)<0))
return -1;
sb->sb_sec = NULL;
if (sb->sb_sec_buf_in.buf_ptr!=0) {
if (grow_buffer( &(sb->sb_buf),
sb->sb_buf.buf_end + sb->sb_sec_buf_in.buf_ptr)<0)
return -1;
memcpy( sb->sb_buf.buf_base + sb->sb_buf.buf_end,
sb->sb_sec_buf_in.buf_base, sb->sb_sec_buf_in.buf_ptr );
sb->sb_buf.buf_end += sb->sb_sec_buf_in.buf_ptr;
sb->sb_buf_ready = 1;
}
sockbuf_buf_destroy( &(sb->sb_sec_buf_in) );
assert( sb->sb_sec_buf.buf_end==0 );
sockbuf_buf_destroy( &(sb->sb_sec_buf_out) );
sb->sb_sec_ready = 0;
return 0;
}
#endif
int ber_pvt_sb_set_io( Sockbuf *sb, Sockbuf_IO *trans, void *arg )
{
assert( sb != NULL);
assert( SOCKBUF_VALID( sb ) );
assert( sb->sb_io == &sb_IO_None );
if (trans==NULL)
return -1;
sb->sb_io = trans;
if ((trans->sbi_setup) && (trans->sbi_setup( sb, arg)<0))
return -1;
return 0;
}
int ber_pvt_sb_clear_io( Sockbuf *sb )
{
assert( sb != NULL);
assert( SOCKBUF_VALID( sb ) );
if (sb->sb_io==&sb_IO_None)
return -1;
if ((sb->sb_io->sbi_remove) && (sb->sb_io->sbi_remove( sb )<0))
return -1;
sb->sb_io = &sb_IO_None;
sb->sb_trans_ready = 0;
return 0;
}
/*
* Support for TCP
*/
static long
stream_read( Sockbuf *sb, void *buf, long len )
{
assert( sb != NULL);
assert( SOCKBUF_VALID( sb ) );
#if defined(MACOS)
/*
* MacTCP/OpenTransport
*/
return tcpread( ber_pvt_sb_get_desc(sb), 0, (unsigned char *)buf,
len, NULL );
#elif defined( HAVE_PCNFS ) || \
defined( HAVE_WINSOCK ) || defined ( __BEOS__ )
/*
* PCNFS (under DOS)
*/
/*
* Windows Socket API (under DOS/Windows 3.x)
*/
/*
* 32-bit Windows Socket API (under Windows NT or Windows 95)
*/
{
int rc;
rc = recv( ber_pvt_sb_get_desc(sb), buf, len, 0 );
#ifdef HAVE_WINSOCK
if ( rc < 0 ) errno = WSAGetLastError();
#endif
return rc;
}
#elif defined( HAVE_NCSA )
/*
* NCSA Telnet TCP/IP stack (under DOS)
*/
return nread( ber_pvt_sb_get_desc(sb), buf, len );
#else
return read( ber_pvt_sb_get_desc(sb), buf, len );
#endif
}
static long
stream_write( Sockbuf *sb, void *buf, long len )
{
assert( sb != NULL);
assert( SOCKBUF_VALID( sb ) );
#if defined(MACOS)
/*
* MacTCP/OpenTransport
*/
#define MAX_WRITE 65535
return tcpwrite( ber_pvt_sb_get_desc(sb),
(unsigned char *)(buf),
(len<MAX_WRITE)? len : MAX_WRITE );
#elif defined( HAVE_PCNFS) \
|| defined( HAVE_WINSOCK) || defined ( __BEOS__ )
/*
* PCNFS (under DOS)
*/
/*
* Windows Socket API (under DOS/Windows 3.x)
*/
/*
* 32-bit Windows Socket API (under Windows NT or Windows 95)
*/
{
int rc;
rc = send( ber_pvt_sb_get_desc(sb), buf, len, 0 );
#ifdef HAVE_WINSOCK
if ( rc < 0 ) errno = WSAGetLastError();
#endif
return rc;
}
#elif defined(HAVE_NCSA)
return netwrite( ber_pvt_sb_get_desc(sb), buf, len );
#elif defined(VMS)
/*
* VMS -- each write must be 64K or smaller
*/
#define MAX_WRITE 65535
return write( ber_pvt_sb_get_desc(sb), buf,
(len<MAX_WRITE)? len : MAX_WRITE);
#else
return write( ber_pvt_sb_get_desc(sb), buf, len );
#endif
}
static int
stream_close( Sockbuf *sb )
{
assert( sb != NULL);
assert( SOCKBUF_VALID( sb ) );
tcp_close( ber_pvt_sb_get_desc( sb ) );
return 0;
}
Sockbuf_IO ber_pvt_sb_io_tcp=
{
NULL, /* sbi_setup */
NULL, /* sbi_release */
stream_read, /* sbi_read */
stream_write, /* sbi_write */
stream_close, /* sbi_close */
};
/*
* Support for UDP (CLDAP)
*/
struct dgram_data
{
struct sockaddr dst;
struct sockaddr src;
};
static int
dgram_setup( Sockbuf *sb, void *arg )
{
assert( sb != NULL);
assert( SOCKBUF_VALID( sb ) );
sb->sb_iodata = malloc( sizeof( struct dgram_data ) );
if (sb->sb_iodata==NULL)
return -1;
sb->sb_read_ahead = 1; /* important since udp is packet based. */
return 0;
}
static int
dgram_release( Sockbuf *sb )
{
assert( sb != NULL);
assert( SOCKBUF_VALID( sb ) );
free( sb->sb_iodata );
return 0;
}
static long
dgram_read( Sockbuf *sb, void *buf, long len )
{
#ifdef LDAP_CONNECTIONLESS
long rc;
int addrlen;
struct dgram_data *dd;
assert( sb != NULL );
assert( SOCKBUF_VALID( sb ) );
assert( buf != NULL );
dd = (struct dgram_data *)(sb->sb_iodata);
addrlen = sizeof( struct sockaddr );
rc=recvfrom( ber_pvt_sb_get_desc(sb), buf, len, 0, &(dd->src), &addrlen );
if ( sb->sb_debug ) {
ber_log_printf( LDAP_DEBUG_ANY, sb->sb_debug,
"dgram_read udp_read %d bytes\n",
rc );
if ( rc > 0 )
ber_log_bprint( LDAP_DEBUG_PACKETS, sb->sb_debug,
buf, rc );
}
return rc;
# else /* LDAP_CONNECTIONLESS */
return -1;
# endif /* LDAP_CONNECTIONLESS */
}
static long
dgram_write( Sockbuf *sb, void *buf, long len )
{
#ifdef LDAP_CONNECTIONLESS
int rc;
struct dgram_data *dd;
assert( sb != NULL );
assert( SOCKBUF_VALID( sb ) );
assert( buf != NULL );
dd = (struct dgram_data *)(sb->sb_iodata);
rc=sendto( ber_pvt_sb_get_desc(sb), buf, len, 0, &(dd->dst),
sizeof( struct sockaddr ) );
if ( rc <= 0 )
return( -1 );
/* fake error if write was not atomic */
if (rc < len) {
# ifdef EMSGSIZE
errno = EMSGSIZE;
# endif
return( -1 );
}
return rc;
#else
return -1;
#endif
}
static int
dgram_close( Sockbuf *sb )
{
assert( sb != NULL );
assert( SOCKBUF_VALID( sb ) );
tcp_close( ber_pvt_sb_get_desc(sb) );
return 0;
}
Sockbuf_IO ber_pvt_sb_io_udp=
{
dgram_setup, /* sbi_setup */
dgram_release, /* sbi_release */
dgram_read, /* sbi_read */
dgram_write, /* sbi_write */
dgram_close, /* sbi_close */
};
int ber_pvt_sb_udp_set_dst(Sockbuf *sb, void *addr )
{
struct dgram_data *dd;
assert( sb != NULL );
assert( SOCKBUF_VALID( sb ) );
assert( sb->sb_io == &ber_pvt_sb_io_udp );
dd = (struct dgram_data *) (sb->sb_iodata);
memcpy( &(dd->dst), addr, sizeof( struct sockaddr ) );
return 0;
}
void *ber_pvt_sb_udp_get_src( Sockbuf *sb )
{
struct dgram_data *dd;
assert( sb != NULL );
assert( SOCKBUF_VALID( sb ) );
assert( sb->sb_io == &ber_pvt_sb_io_udp );
dd = (struct dgram_data *) (sb->sb_iodata);
return &(dd->src);
}
/*
* debug routines.
*
* BUGS:
* These routines should really call abort, but at the moment that would
* break the servers.
*/
static long
have_no_read( Sockbuf *sb, void *buf, long len )
{
assert( sb != NULL );
assert( SOCKBUF_VALID( sb ) );
ber_log_printf( LDAP_DEBUG_ANY, ber_int_debug,
"warning: reading from uninitialized sockbuf\n");
errno = EBADF;
return -1;
}
static long
have_no_write( Sockbuf *sb, void *buf, long len )
{
assert( sb != NULL );
assert( SOCKBUF_VALID( sb ) );
ber_log_printf( LDAP_DEBUG_ANY, ber_int_debug,
"warning: writing to uninitialized sockbuf\n");
errno = EBADF;
return -1;
}
static int
have_no_close( Sockbuf *sb )
{
assert( sb != NULL );
assert( SOCKBUF_VALID( sb ) );
assert( 0 );
return -1;
}
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