1 /* io.c - ber general i/o routines */
3 * Copyright 1998-1999 The OpenLDAP Foundation, All Rights Reserved.
4 * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
7 * Copyright (c) 1990 Regents of the University of Michigan.
10 * Redistribution and use in source and binary forms are permitted
11 * provided that this notice is preserved and that due credit is given
12 * to the University of Michigan at Ann Arbor. The name of the University
13 * may not be used to endorse or promote products derived from this
14 * software without specific prior written permission. This software
15 * is provided ``as is'' without express or implied warranty.
25 #include <ac/socket.h>
26 #include <ac/string.h>
27 #include <ac/unistd.h>
35 static long BerRead LDAP_P(( Sockbuf *sb, char *buf, long len ));
36 static int ber_realloc LDAP_P(( BerElement *ber, unsigned long len ));
41 BerRead( Sockbuf *sb, char *buf, long len )
47 if ( (c = lber_pvt_sb_read( sb, buf, len )) <= 0 ) {
61 ber_read( BerElement *ber, char *buf, unsigned long len )
63 unsigned long actuallen, nleft;
65 nleft = ber->ber_end - ber->ber_ptr;
66 actuallen = nleft < len ? nleft : len;
68 SAFEMEMCPY( buf, ber->ber_ptr, (size_t)actuallen );
70 ber->ber_ptr += actuallen;
72 return( (long)actuallen );
76 ber_write( BerElement *ber, char *buf, unsigned long len, int nosos )
78 if ( nosos || ber->ber_sos == NULL ) {
79 if ( ber->ber_ptr + len > ber->ber_end ) {
80 if ( ber_realloc( ber, len ) != 0 )
83 SAFEMEMCPY( ber->ber_ptr, buf, (size_t)len );
87 if ( ber->ber_sos->sos_ptr + len > ber->ber_end ) {
88 if ( ber_realloc( ber, len ) != 0 )
91 SAFEMEMCPY( ber->ber_sos->sos_ptr, buf, (size_t)len );
92 ber->ber_sos->sos_ptr += len;
93 ber->ber_sos->sos_clen += len;
99 ber_realloc( BerElement *ber, unsigned long len )
101 unsigned long need, have, total;
106 have = (ber->ber_end - ber->ber_buf) / EXBUFSIZ;
107 need = (len < EXBUFSIZ ? 1 : (len + (EXBUFSIZ - 1)) / EXBUFSIZ);
108 total = have * EXBUFSIZ + need * EXBUFSIZ;
110 oldbuf = ber->ber_buf;
112 if ( ber->ber_buf == NULL ) {
113 if ( (ber->ber_buf = (char *) malloc( (size_t)total )) == NULL )
115 } else if ( (ber->ber_buf = (char *) realloc( ber->ber_buf,
116 (size_t)total )) == NULL )
119 ber->ber_end = ber->ber_buf + total;
122 * If the stinking thing was moved, we need to go through and
123 * reset all the sos and ber pointers. Offsets would've been
124 * a better idea... oh well.
127 if ( ber->ber_buf != oldbuf ) {
128 ber->ber_ptr = ber->ber_buf + (ber->ber_ptr - oldbuf);
130 for ( s = ber->ber_sos; s != NULLSEQORSET; s = s->sos_next ) {
131 off = s->sos_first - oldbuf;
132 s->sos_first = ber->ber_buf + off;
134 off = s->sos_ptr - oldbuf;
135 s->sos_ptr = ber->ber_buf + off;
143 ber_free( BerElement *ber, int freebuf )
145 if ( freebuf && ber->ber_buf != NULL )
146 free( ber->ber_buf );
148 free( (char *) ber );
152 ber_flush( Sockbuf *sb, BerElement *ber, int freeit )
154 long nwritten, towrite, rc;
156 if ( ber->ber_rwptr == NULL ) {
157 ber->ber_rwptr = ber->ber_buf;
159 towrite = ber->ber_ptr - ber->ber_rwptr;
161 if ( sb->sb_debug ) {
162 lber_log_printf( LDAP_DEBUG_ANY, sb->sb_debug,
163 "ber_flush: %ld bytes to sd %ld%s\n", towrite,
164 (long) sb->sb_sd, ber->ber_rwptr != ber->ber_buf ? " (re-flush)"
166 lber_log_bprint( LDAP_DEBUG_PACKETS, sb->sb_debug,
167 ber->ber_rwptr, towrite );
170 #if !defined(MACOS) && !defined(DOS)
171 if ( sb->sb_options & (LBER_TO_FILE | LBER_TO_FILE_ONLY) ) {
172 rc = write( sb->sb_fd, ber->ber_rwptr, towrite );
173 if ( sb->sb_options & LBER_TO_FILE_ONLY ) {
181 rc = lber_pvt_sb_write( sb, ber->ber_rwptr, towrite );
187 ber->ber_rwptr += rc;
188 } while ( towrite > 0 );
197 ber_alloc_t( int options )
201 if ( (ber = (BerElement *) calloc( 1, sizeof(BerElement) )) == NULLBER )
203 ber->ber_tag = LBER_DEFAULT;
204 ber->ber_options = options;
205 ber->ber_debug = lber_int_debug;
213 return( ber_alloc_t( 0 ) );
219 return( ber_alloc_t( LBER_USE_DER ) );
223 ber_dup( BerElement *ber )
227 if ( (new = ber_alloc()) == NULLBER )
236 /* OLD U-Mich ber_init() */
238 ber_init_w_nullc( BerElement *ber, int options )
240 (void) memset( (char *)ber, '\0', sizeof( BerElement )); /* ### Bug: Expects pointers to have 00000 bit pattern */
241 ber->ber_tag = LBER_DEFAULT;
242 ber->ber_options = (char) options;
245 /* New C-API ber_init() */
246 /* This function constructs a BerElement containing a copy
247 ** of the data in the bv argument.
250 ber_init( struct berval *bv )
258 ber = ber_alloc_t( 0 );
260 if( ber == NULLBER ) {
261 /* allocation failed */
266 if ( ( (unsigned int) ber_write ( ber, bv->bv_val, bv->bv_len, 0 )) != bv->bv_len ) {
267 /* write failed, so free and return NULL */
272 ber_reset( ber, 1 ); /* reset the pointer to the start of the buffer */
277 /* New C-API ber_flatten routine */
278 /* This routine allocates a struct berval whose contents are a BER
279 ** encoding taken from the ber argument. The bvPtr pointer pointers to
280 ** the returned berval.
284 struct berval **bvPtr)
292 if ( (bv = malloc( sizeof(struct berval))) == NULL ) {
297 /* ber is null, create an empty berval */
302 /* copy the berval */
303 ptrdiff_t len = ber->ber_ptr - ber->ber_buf;
305 if ( (bv->bv_val = (char *) malloc( len + 1 )) == NULL ) {
310 SAFEMEMCPY( bv->bv_val, ber->ber_buf, (size_t)len );
311 bv->bv_val[len] = '\0';
320 ber_reset( BerElement *ber, int was_writing )
323 ber->ber_end = ber->ber_ptr;
324 ber->ber_ptr = ber->ber_buf;
326 ber->ber_ptr = ber->ber_end;
329 ber->ber_rwptr = NULL;
332 /* return the tag - LBER_DEFAULT returned means trouble */
334 get_tag( Sockbuf *sb )
341 if ( lber_pvt_sb_read( sb, (char *) &xbyte, 1 ) != 1 )
342 return( LBER_DEFAULT );
344 if ( (xbyte & LBER_BIG_TAG_MASK) != LBER_BIG_TAG_MASK )
345 return( (unsigned long) xbyte );
347 tagp = (char *) &tag;
349 for ( i = 1; i < sizeof(long); i++ ) {
350 if ( lber_pvt_sb_read( sb, (char *) &xbyte, 1 ) != 1 )
351 return( LBER_DEFAULT );
355 if ( ! (xbyte & LBER_MORE_TAG_MASK) )
360 if ( i == sizeof(long) )
361 return( LBER_DEFAULT );
363 /* want leading, not trailing 0's */
364 return( tag >> (sizeof(long) - i - 1) );
368 ber_get_next( Sockbuf *sb, unsigned long *len, BerElement *ber )
370 unsigned long tag = 0, netlen, toread;
376 if ( ber->ber_debug ) {
377 lber_log_printf( LDAP_DEBUG_TRACE, ber->ber_debug,
382 * Any ber element looks like this: tag length contents.
383 * Assuming everything's ok, we return the tag byte (we
384 * can assume a single byte), return the length in len,
385 * and the rest of the undecoded element in buf.
388 * 1) small tags (less than 128)
389 * 2) definite lengths
390 * 3) primitive encodings used whenever possible
394 * first time through - malloc the buffer, set up ptrs, and
395 * read the tag and the length and as much of the rest as we can
398 if ( ber->ber_rwptr == NULL ) {
400 * First, we read the tag.
403 if ( (tag = get_tag( sb )) == LBER_DEFAULT ) {
404 return( LBER_DEFAULT );
409 * Next, read the length. The first byte contains the length
410 * of the length. If bit 8 is set, the length is the long
411 * form, otherwise it's the short form. We don't allow a
412 * length that's greater than what we can hold in an unsigned
417 if ( lber_pvt_sb_read( sb, (char *) &lc, 1 ) != 1 ) {
418 return( LBER_DEFAULT );
421 noctets = (lc & 0x7f);
422 if ( noctets > sizeof(unsigned long) )
423 return( LBER_DEFAULT );
424 diff = sizeof(unsigned long) - noctets;
425 if ( BerRead( sb, (char *) &netlen + diff, noctets ) !=
427 return( LBER_DEFAULT );
429 *len = AC_NTOHL( netlen );
436 * Finally, malloc a buffer for the contents and read it in.
437 * It's this buffer that's passed to all the other ber decoding
441 #if defined( DOS ) && !defined( _WIN32 )
442 if ( *len > 65535 ) { /* DOS can't allocate > 64K */
443 return( LBER_DEFAULT );
445 #endif /* DOS && !_WIN32 */
447 if ( ( sb->sb_options & LBER_MAX_INCOMING_SIZE ) &&
448 *len > (unsigned long) sb->sb_max_incoming ) {
449 return( LBER_DEFAULT );
452 if ( (ber->ber_buf = (char *) malloc( (size_t)*len )) == NULL ) {
453 return( LBER_DEFAULT );
455 ber->ber_ptr = ber->ber_buf;
456 ber->ber_end = ber->ber_buf + *len;
457 ber->ber_rwptr = ber->ber_buf;
460 toread = (unsigned long)ber->ber_end - (unsigned long)ber->ber_rwptr;
462 if ( (rc = lber_pvt_sb_read( sb, ber->ber_rwptr, (long)toread )) <= 0 ) {
463 return( LBER_DEFAULT );
467 ber->ber_rwptr += rc;
468 } while ( toread > 0 );
470 if ( ber->ber_debug ) {
471 lber_log_printf( LDAP_DEBUG_TRACE, ber->ber_debug,
472 "ber_get_next: tag 0x%lx len %ld contents:\n",
475 lber_log_dump( LDAP_DEBUG_BER, ber->ber_debug, ber, 1 );
479 ber->ber_rwptr = NULL;
480 return( ber->ber_tag );
483 Sockbuf *lber_pvt_sb_alloc( void )
485 Sockbuf *sb = calloc(1, sizeof(Sockbuf));
486 lber_pvt_sb_init( sb );
490 Sockbuf *lber_pvt_sb_alloc_fd( int fd )
492 Sockbuf *sb = lber_pvt_sb_alloc();
493 lber_pvt_sb_set_desc( sb, fd );
494 lber_pvt_sb_set_io( sb, &lber_pvt_sb_io_tcp, NULL );
498 void lber_pvt_sb_free( Sockbuf *sb )
500 if(sb == NULL) return;
501 lber_pvt_sb_destroy( sb );
505 int lber_pvt_sb_get_option( Sockbuf *sb, int opt, void *outvalue )
507 return LBER_OPT_ERROR;
510 int lber_pvt_sb_set_option( Sockbuf *sb, int opt, void *invalue )
512 return LBER_OPT_ERROR;