--- /dev/null
+/* sockbuf.c - i/o routines with support for adding i/o layers. */
+/* $OpenLDAP$ */
+/*
+ * Copyright 1998-2002 The OpenLDAP Foundation, All Rights Reserved.
+ * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
+ */
+
+#include "portable.h"
+
+#include <stdio.h>
+
+#include <ac/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_FCNTL_H )
+#include <fcntl.h>
+#endif
+
+#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"
+
+#ifndef LBER_MIN_BUFF_SIZE
+#define LBER_MIN_BUFF_SIZE 4096
+#endif
+#ifndef LBER_MAX_BUFF_SIZE
+#define LBER_MAX_BUFF_SIZE 65536
+#endif
+#ifndef LBER_DEFAULT_READAHEAD
+#define LBER_DEFAULT_READAHEAD 16384
+#endif
+
+Sockbuf *
+ber_sockbuf_alloc( void )
+{
+ Sockbuf *sb;
+
+ ber_int_options.lbo_valid = LBER_INITIALIZED;
+
+ sb = LBER_CALLOC( 1, sizeof( Sockbuf ) );
+
+ if( sb == NULL ) return NULL;
+
+ ber_int_sb_init( sb );
+ return sb;
+}
+
+void
+ber_sockbuf_free( Sockbuf *sb )
+{
+ assert( sb != NULL );
+ assert( SOCKBUF_VALID( sb ) );
+
+ ber_int_sb_close( sb );
+ ber_int_sb_destroy( sb );
+ LBER_FREE( sb );
+}
+
+/* Return values: -1: error, 0: no operation performed or the answer is false,
+ * 1: successful operation or the answer is true
+ */
+int
+ber_sockbuf_ctrl( Sockbuf *sb, int opt, void *arg )
+{
+ Sockbuf_IO_Desc *p;
+ int ret = 0;
+
+ assert( sb != NULL );
+ assert( SOCKBUF_VALID( sb ) );
+
+ switch ( opt ) {
+ case LBER_SB_OPT_HAS_IO:
+ p = sb->sb_iod;
+ while ( p && p->sbiod_io != (Sockbuf_IO *)arg ) {
+ p = p->sbiod_next;
+ }
+
+ if ( p ) {
+ ret = 1;
+ }
+ break;
+
+ case LBER_SB_OPT_GET_FD:
+ if ( arg != NULL ) {
+ *((int *)arg) = sb->sb_fd;
+ }
+ ret = ( sb->sb_fd == AC_SOCKET_INVALID ? -1 : 1);
+ break;
+
+ case LBER_SB_OPT_SET_FD:
+ sb->sb_fd = *((int *)arg);
+ ret = 1;
+ break;
+
+ case LBER_SB_OPT_SET_NONBLOCK:
+ ret = ber_pvt_socket_set_nonblock( sb->sb_fd, arg != NULL)
+ ? -1 : 1;
+ break;
+
+ case LBER_SB_OPT_DRAIN: {
+ /* Drain the data source to enable possible errors (e.g.
+ * TLS) to be propagated to the upper layers
+ */
+ char buf[LBER_MIN_BUFF_SIZE];
+
+ do {
+ ret = ber_int_sb_read( sb, buf, sizeof( buf ) );
+ } while ( ret == sizeof( buf ) );
+
+ ret = 1;
+ } break;
+
+ case LBER_SB_OPT_NEEDS_READ:
+ ret = ( sb->sb_trans_needs_read ? 1 : 0 );
+ break;
+
+ case LBER_SB_OPT_NEEDS_WRITE:
+ ret = ( sb->sb_trans_needs_write ? 1 : 0 );
+ break;
+
+ case LBER_SB_OPT_GET_MAX_INCOMING:
+ if ( arg != NULL ) {
+ *((ber_len_t *)arg) = sb->sb_max_incoming;
+ }
+ ret = 1;
+ break;
+
+ case LBER_SB_OPT_SET_MAX_INCOMING:
+ sb->sb_max_incoming = *((ber_len_t *)arg);
+ ret = 1;
+ break;
+
+ default:
+ ret = sb->sb_iod->sbiod_io->sbi_ctrl( sb->sb_iod,
+ opt, arg );
+ break;
+ }
+
+ return ret;
+}
+
+int
+ber_sockbuf_add_io( Sockbuf *sb, Sockbuf_IO *sbio, int layer, void *arg )
+{
+ Sockbuf_IO_Desc *d, *p, **q;
+
+ assert( sb != NULL );
+ assert( SOCKBUF_VALID( sb ) );
+
+ if ( sbio == NULL ) {
+ return -1;
+ }
+
+ q = &sb->sb_iod;
+ p = *q;
+ while ( p && p->sbiod_level > layer ) {
+ q = &p->sbiod_next;
+ p = *q;
+ }
+
+ d = LBER_MALLOC( sizeof( *d ) );
+ if ( d == NULL ) {
+ return -1;
+ }
+
+ d->sbiod_level = layer;
+ d->sbiod_sb = sb;
+ d->sbiod_io = sbio;
+ memset( &d->sbiod_pvt, '\0', sizeof( d->sbiod_pvt ) );
+ d->sbiod_next = p;
+ *q = d;
+
+ if ( sbio->sbi_setup != NULL && ( sbio->sbi_setup( d, arg ) < 0 ) ) {
+ return -1;
+ }
+
+ return 0;
+}
+
+int
+ber_sockbuf_remove_io( Sockbuf *sb, Sockbuf_IO *sbio, int layer )
+{
+ Sockbuf_IO_Desc *p, **q;
+
+ assert( sb != NULL );
+ assert( SOCKBUF_VALID( sb ) );
+
+ if ( sb->sb_iod == NULL ) {
+ return -1;
+ }
+
+ q = &sb->sb_iod;
+ while ( *q != NULL ) {
+ p = *q;
+ if ( layer == p->sbiod_level && p->sbiod_io == sbio ) {
+ if ( p->sbiod_io->sbi_remove != NULL &&
+ p->sbiod_io->sbi_remove( p ) < 0 )
+ {
+ return -1;
+ }
+ *q = p->sbiod_next;
+ LBER_FREE( p );
+ break;
+ }
+ q = &p->sbiod_next;
+ }
+
+ return 0;
+}
+
+void
+ber_pvt_sb_buf_init( Sockbuf_Buf *buf )
+{
+ buf->buf_base = NULL;
+ buf->buf_ptr = 0;
+ buf->buf_end = 0;
+ buf->buf_size = 0;
+}
+
+void
+ber_pvt_sb_buf_destroy( Sockbuf_Buf *buf )
+{
+ assert( buf != NULL);
+
+ if (buf->buf_base) {
+ LBER_FREE( buf->buf_base );
+ }
+ ber_pvt_sb_buf_init( buf );
+}
+
+int
+ber_pvt_sb_grow_buffer( Sockbuf_Buf *buf, ber_len_t minsize )
+{
+ ber_len_t pw;
+ char *p;
+
+ assert( buf != NULL );
+
+ for ( pw = LBER_MIN_BUFF_SIZE; pw < minsize; pw <<= 1 ) {
+ if (pw > LBER_MAX_BUFF_SIZE) return -1;
+ }
+
+ if ( buf->buf_size < pw ) {
+ p = LBER_REALLOC( buf->buf_base, pw );
+ if ( p == NULL ) return -1;
+ buf->buf_base = p;
+ buf->buf_size = pw;
+ }
+ return 0;
+}
+
+ber_len_t
+ber_pvt_sb_copy_out( Sockbuf_Buf *sbb, char *buf, ber_len_t len )
+{
+ ber_len_t max;
+
+ assert( buf != NULL );
+ assert( sbb != NULL );
+#if 0
+ assert( sbb->buf_size > 0 );
+#endif
+
+ max = sbb->buf_end - sbb->buf_ptr;
+ max = ( max < len) ? max : len;
+ if ( max ) {
+ AC_MEMCPY( buf, sbb->buf_base + sbb->buf_ptr, max );
+ sbb->buf_ptr += max;
+ if ( sbb->buf_ptr >= sbb->buf_end ) {
+ sbb->buf_ptr = sbb->buf_end = 0;
+ }
+ }
+ return max;
+}
+
+ber_slen_t
+ber_pvt_sb_do_write( Sockbuf_IO_Desc *sbiod, Sockbuf_Buf *buf_out )
+{
+ ber_len_t to_go;
+ ber_slen_t ret;
+
+ assert( sbiod != NULL );
+ assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
+
+ to_go = buf_out->buf_end - buf_out->buf_ptr;
+ assert( to_go > 0 );
+
+ for(;;) {
+ ret = LBER_SBIOD_WRITE_NEXT( sbiod, buf_out->buf_base +
+ buf_out->buf_ptr, to_go );
+#ifdef EINTR
+ if ((ret<0) && (errno==EINTR)) continue;
+#endif
+ break;
+ }
+
+ if ( ret <= 0 ) return ret;
+
+ buf_out->buf_ptr += ret;
+ if (buf_out->buf_ptr == buf_out->buf_end) {
+ buf_out->buf_end = buf_out->buf_ptr = 0;
+ }
+
+ if ( (ber_len_t)ret < to_go ) {
+ /* not enough data, so pretend no data was sent. */
+ return -1;
+ }
+
+ return ret;
+}
+
+int
+ber_pvt_socket_set_nonblock( ber_socket_t sd, int nb )
+{
+#if HAVE_FCNTL
+ int flags = fcntl( sd, F_GETFL);
+ if( nb ) {
+ flags |= O_NONBLOCK;
+ } else {
+ flags &= ~O_NONBLOCK;
+ }
+ return fcntl( sd, F_SETFL, flags );
+
+#elif defined( FIONBIO )
+ ioctl_t status = nb ? 1 : 0;
+ return ioctl( sd, FIONBIO, &status );
+#endif
+}
+
+int
+ber_int_sb_init( Sockbuf *sb )
+{
+ assert( sb != NULL);
+
+ sb->sb_valid=LBER_VALID_SOCKBUF;
+ sb->sb_options = 0;
+ sb->sb_debug = ber_int_debug;
+ sb->sb_fd = AC_SOCKET_INVALID;
+ sb->sb_iod = NULL;
+ sb->sb_trans_needs_read = 0;
+ sb->sb_trans_needs_write = 0;
+
+ assert( SOCKBUF_VALID( sb ) );
+ return 0;
+}
+
+int
+ber_int_sb_close( Sockbuf *sb )
+{
+ Sockbuf_IO_Desc *p;
+
+ assert( sb != NULL);
+
+ p = sb->sb_iod;
+ while ( p ) {
+ if ( p->sbiod_io->sbi_close &&
+ p->sbiod_io->sbi_close( p ) < 0 )
+ {
+ return -1;
+ }
+ p = p->sbiod_next;
+ }
+
+ sb->sb_fd = AC_SOCKET_INVALID;
+
+ return 0;
+}
+
+int
+ber_int_sb_destroy( Sockbuf *sb )
+{
+ Sockbuf_IO_Desc *p;
+
+ assert( sb != NULL);
+ assert( SOCKBUF_VALID( sb ) );
+
+ while ( sb->sb_iod ) {
+ p = sb->sb_iod->sbiod_next;
+ ber_sockbuf_remove_io( sb, sb->sb_iod->sbiod_io,
+ sb->sb_iod->sbiod_level );
+ sb->sb_iod = p;
+ }
+
+ return ber_int_sb_init( sb );
+}
+
+ber_slen_t
+ber_int_sb_read( Sockbuf *sb, void *buf, ber_len_t len )
+{
+ ber_slen_t ret;
+
+ assert( buf != NULL );
+ assert( sb != NULL);
+ assert( sb->sb_iod != NULL );
+ assert( SOCKBUF_VALID( sb ) );
+
+ for (;;) {
+ ret = sb->sb_iod->sbiod_io->sbi_read( sb->sb_iod, buf, len );
+
+#ifdef EINTR
+ if ( ( ret < 0 ) && ( errno == EINTR ) ) continue;
+#endif
+ break;
+ }
+
+ return ret;
+}
+
+ber_slen_t
+ber_int_sb_write( Sockbuf *sb, void *buf, ber_len_t len )
+{
+ ber_slen_t ret;
+
+ assert( buf != NULL );
+ assert( sb != NULL);
+ assert( sb->sb_iod != NULL );
+ assert( SOCKBUF_VALID( sb ) );
+
+ for (;;) {
+ ret = sb->sb_iod->sbiod_io->sbi_write( sb->sb_iod, buf, len );
+
+#ifdef EINTR
+ if ( ( ret < 0 ) && ( errno == EINTR ) ) continue;
+#endif
+ break;
+ }
+
+ return ret;
+}
+
+/*
+ * Support for TCP
+ */
+
+static ber_slen_t
+sb_stream_read( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len )
+{
+ assert( sbiod != NULL);
+ assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
+
+#if defined(MACOS)
+/*
+ * MacTCP/OpenTransport
+ */
+ return tcpread( sbiod->sbiod_sb->sb_fd, 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( sbiod->sbiod_sb->sb_fd, buf, len, 0 );
+
+#ifdef HAVE_WINSOCK
+ if ( rc < 0 ) {
+ int err;
+
+ err = WSAGetLastError();
+ errno = err;
+ }
+#endif
+
+ return rc;
+ }
+
+#elif defined( HAVE_NCSA )
+/*
+ * NCSA Telnet TCP/IP stack (under DOS)
+ */
+ return nread( sbiod->sbiod_sb->sb_fd, buf, len );
+
+#else
+ return read( sbiod->sbiod_sb->sb_fd, buf, len );
+#endif
+}
+
+static ber_slen_t
+sb_stream_write( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len )
+{
+ assert( sbiod != NULL);
+ assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
+
+#if defined(MACOS)
+/*
+ * MacTCP/OpenTransport
+ */
+#define MAX_WRITE 65535
+ return tcpwrite( sbiod->sbiod_sb->sb_fd, (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 = send( sbiod->sbiod_sb->sb_fd, buf, len, 0 );
+
+#ifdef HAVE_WINSOCK
+ if ( rc < 0 ) {
+ int err;
+ err = WSAGetLastError();
+ errno = err;
+ }
+#endif
+ return rc;
+ }
+
+#elif defined(HAVE_NCSA)
+ return netwrite( sbiod->sbiod_sb->sb_fd, buf, len );
+
+#elif defined(VMS)
+/*
+ * VMS -- each write must be 64K or smaller
+ */
+#define MAX_WRITE 65535
+ return write( sbiod->sbiod_sb->sb_fd, buf,
+ (len<MAX_WRITE) ? len : MAX_WRITE);
+#else
+ return write( sbiod->sbiod_sb->sb_fd, buf, len );
+#endif
+}
+
+static int
+sb_stream_close( Sockbuf_IO_Desc *sbiod )
+{
+ assert( sbiod != NULL );
+ assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
+ tcp_close( sbiod->sbiod_sb->sb_fd );
+ return 0;
+}
+
+/* The argument is a pointer to the socket descriptor */
+static int
+sb_stream_setup( Sockbuf_IO_Desc *sbiod, void *arg ) {
+ assert( sbiod != NULL );
+
+ if ( arg != NULL ) {
+ sbiod->sbiod_sb->sb_fd = *((int *)arg);
+ }
+ return 0;
+}
+
+static int
+sb_stream_ctrl( Sockbuf_IO_Desc *sbiod, int opt, void *arg ) {
+ /* This is an end IO descriptor */
+ return 0;
+}
+
+Sockbuf_IO ber_sockbuf_io_tcp = {
+ sb_stream_setup, /* sbi_setup */
+ NULL, /* sbi_remove */
+ sb_stream_ctrl, /* sbi_ctrl */
+ sb_stream_read, /* sbi_read */
+ sb_stream_write, /* sbi_write */
+ sb_stream_close /* sbi_close */
+};
+
+
+/*
+ * Support for readahead (UDP needs it)
+ */
+
+static int
+sb_rdahead_setup( Sockbuf_IO_Desc *sbiod, void *arg )
+{
+ Sockbuf_Buf *p;
+
+ assert( sbiod != NULL );
+
+ p = LBER_MALLOC( sizeof( *p ) );
+ if ( p == NULL ) return -1;
+
+ ber_pvt_sb_buf_init( p );
+
+ if ( arg == NULL ) {
+ ber_pvt_sb_grow_buffer( p, LBER_DEFAULT_READAHEAD );
+ } else {
+ ber_pvt_sb_grow_buffer( p, *((int *)arg) );
+ }
+
+ sbiod->sbiod_pvt = p;
+ return 0;
+}
+
+static int
+sb_rdahead_remove( Sockbuf_IO_Desc *sbiod )
+{
+ Sockbuf_Buf *p;
+
+ assert( sbiod != NULL );
+
+ p = (Sockbuf_Buf *)sbiod->sbiod_pvt;
+
+ if ( p->buf_ptr != p->buf_end ) return -1;
+
+ ber_pvt_sb_buf_destroy( (Sockbuf_Buf *)(sbiod->sbiod_pvt) );
+ LBER_FREE( sbiod->sbiod_pvt );
+ sbiod->sbiod_pvt = NULL;
+
+ return 0;
+}
+
+static ber_slen_t
+sb_rdahead_read( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len )
+{
+ Sockbuf_Buf *p;
+ ber_slen_t bufptr = 0, ret, max;
+
+ assert( sbiod != NULL );
+ assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
+ assert( sbiod->sbiod_next != NULL );
+
+ p = (Sockbuf_Buf *)sbiod->sbiod_pvt;
+
+ assert( p->buf_size > 0 );
+
+ /* Are there anything left in the buffer? */
+ ret = ber_pvt_sb_copy_out( p, buf, len );
+ bufptr += ret;
+ len -= ret;
+
+ if ( len == 0 ) return bufptr;
+
+ max = p->buf_size - p->buf_end;
+ ret = 0;
+ while ( max > 0 ) {
+ ret = LBER_SBIOD_READ_NEXT( sbiod, p->buf_base + p->buf_end,
+ max );
+#ifdef EINTR
+ if ( ( ret < 0 ) && ( errno == EINTR ) ) continue;
+#endif
+ break;
+ }
+
+ if ( ret < 0 ) {
+ return ( bufptr ? bufptr : ret );
+ }
+
+ p->buf_end += ret;
+ bufptr += ber_pvt_sb_copy_out( p, (char *) buf + bufptr, len );
+ return bufptr;
+}
+
+static ber_slen_t
+sb_rdahead_write( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len )
+{
+ assert( sbiod != NULL );
+ assert( sbiod->sbiod_next != NULL );
+
+ return LBER_SBIOD_WRITE_NEXT( sbiod, buf, len );
+}
+
+static int
+sb_rdahead_close( Sockbuf_IO_Desc *sbiod )
+{
+ assert( sbiod != NULL );
+
+ /* Just erase the buffer */
+ ber_pvt_sb_buf_destroy((Sockbuf_Buf *)sbiod->sbiod_pvt);
+ return 0;
+}
+
+static int
+sb_rdahead_ctrl( Sockbuf_IO_Desc *sbiod, int opt, void *arg )
+{
+ Sockbuf_Buf *p;
+
+ p = (Sockbuf_Buf *)sbiod->sbiod_pvt;
+
+ if ( opt == LBER_SB_OPT_DATA_READY ) {
+ if ( p->buf_ptr != p->buf_end ) {
+ return 1;
+ }
+
+ } else if ( opt == LBER_SB_OPT_SET_READAHEAD ) {
+ if ( p->buf_size >= *((ber_len_t *)arg) ) {
+ return 0;
+ }
+ return ( ber_pvt_sb_grow_buffer( p, *((int *)arg) ) ?
+ -1 : 1 );
+ }
+
+ return LBER_SBIOD_CTRL_NEXT( sbiod, opt, arg );
+}
+
+Sockbuf_IO ber_sockbuf_io_readahead = {
+ sb_rdahead_setup, /* sbi_setup */
+ sb_rdahead_remove, /* sbi_remove */
+ sb_rdahead_ctrl, /* sbi_ctrl */
+ sb_rdahead_read, /* sbi_read */
+ sb_rdahead_write, /* sbi_write */
+ sb_rdahead_close /* sbi_close */
+};
+
+/*
+ * Support for simple file IO
+ */
+
+static ber_slen_t
+sb_fd_read( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len )
+{
+ assert( sbiod != NULL);
+ assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
+
+ return read( sbiod->sbiod_sb->sb_fd, buf, len );
+}
+
+static ber_slen_t
+sb_fd_write( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len )
+{
+ assert( sbiod != NULL);
+ assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
+
+ return write( sbiod->sbiod_sb->sb_fd, buf, len );
+}
+
+static int
+sb_fd_close( Sockbuf_IO_Desc *sbiod )
+{
+ assert( sbiod != NULL );
+ assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
+
+ close( sbiod->sbiod_sb->sb_fd );
+ return 0;
+}
+
+/* The argument is a pointer to the file descriptor */
+static int
+sb_fd_setup( Sockbuf_IO_Desc *sbiod, void *arg ) {
+ assert( sbiod != NULL );
+
+ if ( arg != NULL )
+ sbiod->sbiod_sb->sb_fd = *((int *)arg);
+ return 0;
+}
+
+static int
+sb_fd_ctrl( Sockbuf_IO_Desc *sbiod, int opt, void *arg ) {
+ /* This is an end IO descriptor */
+ return 0;
+}
+
+Sockbuf_IO ber_sockbuf_io_fd = {
+ sb_fd_setup, /* sbi_setup */
+ NULL, /* sbi_remove */
+ sb_fd_ctrl, /* sbi_ctrl */
+ sb_fd_read, /* sbi_read */
+ sb_fd_write, /* sbi_write */
+ sb_fd_close /* sbi_close */
+};
+
+/*
+ * Debugging layer
+ */
+
+static int
+sb_debug_setup( Sockbuf_IO_Desc *sbiod, void *arg )
+{
+ assert( sbiod != NULL );
+
+ if ( arg == NULL ) arg = "sockbuf_";
+
+ sbiod->sbiod_pvt = LBER_MALLOC( strlen( arg ) + 1 );
+ if ( sbiod->sbiod_pvt == NULL ) return -1;
+
+ strcpy( (char *)sbiod->sbiod_pvt, (char *)arg );
+ return 0;
+}
+
+static int
+sb_debug_remove( Sockbuf_IO_Desc *sbiod )
+{
+ assert( sbiod != NULL );
+ assert( sbiod->sbiod_pvt != NULL );
+
+ LBER_FREE( sbiod->sbiod_pvt );
+ sbiod->sbiod_pvt = NULL;
+ return 0;
+}
+
+static int
+sb_debug_ctrl( Sockbuf_IO_Desc *sbiod, int opt, void *arg )
+{
+ return LBER_SBIOD_CTRL_NEXT( sbiod, opt, arg );
+}
+
+static ber_slen_t
+sb_debug_read( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len )
+{
+ ber_slen_t ret;
+
+ ret = LBER_SBIOD_READ_NEXT( sbiod, buf, len );
+ if (sbiod->sbiod_sb->sb_debug & LDAP_DEBUG_PACKETS)
+ {
+ int err = errno;
+ if ( ret < 0 ) {
+ ber_log_printf( LDAP_DEBUG_PACKETS, sbiod->sbiod_sb->sb_debug,
+ "%sread: want=%ld error=%s\n", (char *)sbiod->sbiod_pvt,
+ (long)len, STRERROR( errno ) );
+ } else {
+ ber_log_printf( LDAP_DEBUG_PACKETS, sbiod->sbiod_sb->sb_debug,
+ "%sread: want=%ld, got=%ld\n", (char *)sbiod->sbiod_pvt,
+ (long)len, (long)ret );
+ ber_log_bprint( LDAP_DEBUG_PACKETS, sbiod->sbiod_sb->sb_debug,
+ (const char *)buf, ret );
+ }
+ errno = err;
+ }
+ return ret;
+}
+
+static ber_slen_t
+sb_debug_write( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len )
+{
+ ber_slen_t ret;
+
+ ret = LBER_SBIOD_WRITE_NEXT( sbiod, buf, len );
+ if (sbiod->sbiod_sb->sb_debug & LDAP_DEBUG_PACKETS)
+ {
+ int err = errno;
+ if ( ret < 0 ) {
+ ber_log_printf( LDAP_DEBUG_PACKETS, sbiod->sbiod_sb->sb_debug,
+ "%swrite: want=%ld error=%s\n",
+ (char *)sbiod->sbiod_pvt, (long)len,
+ STRERROR( errno ) );
+ errno = err;
+ } else {
+ ber_log_printf( LDAP_DEBUG_PACKETS, sbiod->sbiod_sb->sb_debug,
+ "%swrite: want=%ld, written=%ld\n",
+ (char *)sbiod->sbiod_pvt, (long)len, (long)ret );
+ ber_log_bprint( LDAP_DEBUG_PACKETS, sbiod->sbiod_sb->sb_debug,
+ (const char *)buf, ret );
+ }
+ errno = err;
+ }
+
+ return ret;
+}
+
+Sockbuf_IO ber_sockbuf_io_debug = {
+ sb_debug_setup, /* sbi_setup */
+ sb_debug_remove, /* sbi_remove */
+ sb_debug_ctrl, /* sbi_ctrl */
+ sb_debug_read, /* sbi_read */
+ sb_debug_write, /* sbi_write */
+ NULL /* sbi_close */
+};
+
+#ifdef LDAP_CONNECTIONLESS
+
+/*
+ * Support for UDP (CLDAP)
+ *
+ * All I/O at this level must be atomic. For ease of use, the sb_readahead
+ * must be used above this module. All data reads and writes are prefixed
+ * with a sockaddr containing the address of the remote entity. Upper levels
+ * must read and write this sockaddr before doing the usual ber_printf/scanf
+ * operations on LDAP messages.
+ */
+
+static int
+sb_dgram_setup( Sockbuf_IO_Desc *sbiod, void *arg )
+{
+ assert( sbiod != NULL);
+ assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
+
+ if ( arg != NULL )
+ sbiod->sbiod_sb->sb_fd = *((int *)arg);
+ return 0;
+}
+
+static ber_slen_t
+sb_dgram_read( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len )
+{
+ ber_slen_t rc;
+ socklen_t addrlen;
+ struct sockaddr *src;
+
+ assert( sbiod != NULL );
+ assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
+ assert( buf != NULL );
+
+ addrlen = sizeof( struct sockaddr );
+ src = buf;
+ buf += addrlen;
+ rc = recvfrom( sbiod->sbiod_sb->sb_fd, buf, len, 0, src,
+ &addrlen );
+
+ return rc > 0 ? rc+sizeof(struct sockaddr) : rc;
+}
+
+static ber_slen_t
+sb_dgram_write( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len )
+{
+ ber_slen_t rc;
+ struct sockaddr *dst;
+
+ assert( sbiod != NULL );
+ assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
+ assert( buf != NULL );
+
+ dst = buf;
+ buf += sizeof( struct sockaddr );
+ len -= sizeof( struct sockaddr );
+
+ rc = sendto( sbiod->sbiod_sb->sb_fd, buf, len, 0, 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;
+ }
+ rc = len + sizeof(struct sockaddr);
+ return rc;
+}
+
+static int
+sb_dgram_close( Sockbuf_IO_Desc *sbiod )
+{
+ assert( sbiod != NULL );
+ assert( SOCKBUF_VALID( sbiod->sbiod_sb ) );
+
+ tcp_close( sbiod->sbiod_sb->sb_fd );
+ return 0;
+}
+
+static int
+sb_dgram_ctrl( Sockbuf_IO_Desc *sbiod, int opt, void *arg )
+{
+ /* This is an end IO descriptor */
+ return 0;
+}
+
+Sockbuf_IO ber_sockbuf_io_udp =
+{
+ sb_dgram_setup, /* sbi_setup */
+ NULL, /* sbi_remove */
+ sb_dgram_ctrl, /* sbi_ctrl */
+ sb_dgram_read, /* sbi_read */
+ sb_dgram_write, /* sbi_write */
+ sb_dgram_close /* sbi_close */
+};
+
+#endif /* LDAP_CONNECTIONLESS */
projects / openldap / commitdiff