1 /* io.c - ber general i/o routines */
3 * Copyright (c) 1990 Regents of the University of Michigan.
6 * Redistribution and use in source and binary forms are permitted
7 * provided that this notice is preserved and that due credit is given
8 * to the University of Michigan at Ann Arbor. The name of the University
9 * may not be used to endorse or promote products derived from this
10 * software without specific prior written permission. This software
11 * is provided ``as is'' without express or implied warranty.
21 #include <ac/socket.h>
22 #include <ac/string.h>
23 #include <ac/unistd.h>
31 static int ber_realloc LDAP_P(( BerElement *ber, unsigned long len ));
32 static int ber_filbuf LDAP_P(( Sockbuf *sb, long len ));
33 static long BerRead LDAP_P(( Sockbuf *sb, char *buf, long len ));
35 static int BerWrite LDAP_P(( Sockbuf *sb, char *buf, long len ));
38 #define bergetc( sb, len ) ( sb->sb_ber.ber_end > sb->sb_ber.ber_ptr ? \
39 (unsigned char)*sb->sb_ber.ber_ptr++ : \
40 ber_filbuf( sb, len ))
44 * MacTCP/OpenTransport
46 #define read( s, b, l ) tcpread( s, 0, (unsigned char *)b, l, NULL )
47 #define MAX_WRITE 65535
48 #define BerWrite( sb, b, l ) tcpwrite( sb->sb_sd, (unsigned char *)(b), (l<MAX_WRITE)? l : MAX_WRITE )
55 #define read( s, b, l ) recv( s, b, l, 0 )
56 #define BerWrite( s, b, l ) send( s->sb_sd, b, (int) l, 0 )
60 * NCSA Telnet TCP/IP stack (under DOS)
62 #define read( s, b, l ) nread( s, b, l )
63 #define BerWrite( s, b, l ) netwrite( s->sb_sd, b, l )
67 * Windows Socket API (under DOS/Windows 3.x)
69 #define read( s, b, l ) recv( s, b, l, 0 )
70 #define BerWrite( s, b, l ) send( s->sb_sd, b, l, 0 )
75 * 32-bit Windows Socket API (under Windows NT or Windows 95)
77 #define read( s, b, l ) recv( s, b, l, 0 )
78 #define BerWrite( s, b, l ) send( s->sb_sd, b, l, 0 )
82 * VMS -- each write must be 64K or smaller
84 #define MAX_WRITE 65535
85 #define BerWrite( sb, b, l ) write( sb->sb_sd, b, (l<MAX_WRITE)? l : MAX_WRITE)
88 * everything else (Unix/BSD 4.3 socket API)
90 #define BerWrite( sb, b, l ) write( sb->sb_sd, b, l )
92 #define udp_read( sb, b, l, al ) recvfrom(sb->sb_sd, (char *)b, l, 0, \
93 (struct sockaddr *)sb->sb_fromaddr, \
94 (al = sizeof(struct sockaddr), &al))
95 #define udp_write( sb, b, l ) sendto(sb->sb_sd, (char *)(b), l, 0, \
96 (struct sockaddr *)sb->sb_useaddr, sizeof(struct sockaddr))
102 #define udp_read( sb, b, l, al ) CLDAP NOT SUPPORTED
103 #define udp_write( sb, b, l ) CLDAP NOT SUPPORTED
104 #endif /* udp_read */
106 #define EXBUFSIZ 1024
109 ber_filbuf( Sockbuf *sb, long len )
112 #ifdef LDAP_CONNECTIONLESS
114 #endif /* LDAP_CONNECTIONLESS */
116 if ( sb->sb_ber.ber_buf == NULL ) {
117 if ( (sb->sb_ber.ber_buf = (char *) malloc( READBUFSIZ )) ==
120 sb->sb_ber.ber_ptr = sb->sb_ber.ber_buf;
121 sb->sb_ber.ber_end = sb->sb_ber.ber_buf;
124 if ( sb->sb_naddr > 0 ) {
125 #ifdef LDAP_CONNECTIONLESS
126 rc = udp_read(sb, sb->sb_ber.ber_buf, READBUFSIZ, addrlen );
129 fprintf( stderr, "ber_filbuf udp_read %d bytes\n",
131 if ( lber_debug > 1 && rc > 0 )
132 lber_bprint( sb->sb_ber.ber_buf, rc );
134 #endif /* LDAP_DEBUG */
135 #else /* LDAP_CONNECTIONLESS */
137 #endif /* LDAP_CONNECTIONLESS */
139 rc = read( sb->sb_sd, sb->sb_ber.ber_buf,
140 ((sb->sb_options & LBER_NO_READ_AHEAD) && (len < READBUFSIZ)) ?
145 sb->sb_ber.ber_ptr = sb->sb_ber.ber_buf + 1;
146 sb->sb_ber.ber_end = sb->sb_ber.ber_buf + rc;
147 return( (unsigned char)*sb->sb_ber.ber_buf );
155 BerRead( Sockbuf *sb, char *buf, long len )
161 if ( (c = bergetc( sb, len )) < 0 ) {
176 ber_read( BerElement *ber, char *buf, unsigned long len )
178 unsigned long actuallen, nleft;
180 nleft = ber->ber_end - ber->ber_ptr;
181 actuallen = nleft < len ? nleft : len;
183 SAFEMEMCPY( buf, ber->ber_ptr, (size_t)actuallen );
185 ber->ber_ptr += actuallen;
187 return( (long)actuallen );
191 ber_write( BerElement *ber, char *buf, unsigned long len, int nosos )
193 if ( nosos || ber->ber_sos == NULL ) {
194 if ( ber->ber_ptr + len > ber->ber_end ) {
195 if ( ber_realloc( ber, len ) != 0 )
198 SAFEMEMCPY( ber->ber_ptr, buf, (size_t)len );
202 if ( ber->ber_sos->sos_ptr + len > ber->ber_end ) {
203 if ( ber_realloc( ber, len ) != 0 )
206 SAFEMEMCPY( ber->ber_sos->sos_ptr, buf, (size_t)len );
207 ber->ber_sos->sos_ptr += len;
208 ber->ber_sos->sos_clen += len;
214 ber_realloc( BerElement *ber, unsigned long len )
216 unsigned long need, have, total;
221 have = (ber->ber_end - ber->ber_buf) / EXBUFSIZ;
222 need = (len < EXBUFSIZ ? 1 : (len + (EXBUFSIZ - 1)) / EXBUFSIZ);
223 total = have * EXBUFSIZ + need * EXBUFSIZ;
225 oldbuf = ber->ber_buf;
227 if ( ber->ber_buf == NULL ) {
228 if ( (ber->ber_buf = (char *) malloc( (size_t)total )) == NULL )
230 } else if ( (ber->ber_buf = (char *) realloc( ber->ber_buf,
231 (size_t)total )) == NULL )
234 ber->ber_end = ber->ber_buf + total;
237 * If the stinking thing was moved, we need to go through and
238 * reset all the sos and ber pointers. Offsets would've been
239 * a better idea... oh well.
242 if ( ber->ber_buf != oldbuf ) {
243 ber->ber_ptr = ber->ber_buf + (ber->ber_ptr - oldbuf);
245 for ( s = ber->ber_sos; s != NULLSEQORSET; s = s->sos_next ) {
246 off = s->sos_first - oldbuf;
247 s->sos_first = ber->ber_buf + off;
249 off = s->sos_ptr - oldbuf;
250 s->sos_ptr = ber->ber_buf + off;
258 ber_free( BerElement *ber, int freebuf )
260 if ( freebuf && ber->ber_buf != NULL )
261 free( ber->ber_buf );
262 free( (char *) ber );
266 ber_flush( Sockbuf *sb, BerElement *ber, int freeit )
268 long nwritten, towrite, rc;
270 if ( ber->ber_rwptr == NULL ) {
271 ber->ber_rwptr = ber->ber_buf;
273 towrite = ber->ber_ptr - ber->ber_rwptr;
277 fprintf( stderr, "ber_flush: %ld bytes to sd %ld%s\n", towrite,
278 (long) sb->sb_sd, ber->ber_rwptr != ber->ber_buf ? " (re-flush)"
280 if ( lber_debug > 1 )
281 lber_bprint( ber->ber_rwptr, towrite );
284 #if !defined(MACOS) && !defined(DOS)
285 if ( sb->sb_options & (LBER_TO_FILE | LBER_TO_FILE_ONLY) ) {
286 rc = write( sb->sb_fd, ber->ber_buf, towrite );
287 if ( sb->sb_options & LBER_TO_FILE_ONLY ) {
295 if (sb->sb_naddr > 0) {
296 #ifdef LDAP_CONNECTIONLESS
297 rc = udp_write( sb, ber->ber_buf + nwritten,
299 #else /* LDAP_CONNECTIONLESS */
301 #endif /* LDAP_CONNECTIONLESS */
305 /* fake error if write was not atomic */
313 if ( (rc = BerWrite( sb, ber->ber_rwptr,
314 (size_t) towrite )) <= 0 ) {
320 ber->ber_rwptr += rc;
321 } while ( towrite > 0 );
330 ber_alloc_t( int options )
334 if ( (ber = (BerElement *) calloc( 1, sizeof(BerElement) )) == NULLBER )
336 ber->ber_tag = LBER_DEFAULT;
337 ber->ber_options = (char) options;
345 return( ber_alloc_t( 0 ) );
351 return( ber_alloc_t( LBER_USE_DER ) );
355 ber_dup( BerElement *ber )
359 if ( (new = ber_alloc()) == NULLBER )
368 /* OLD U-Mich ber_init() */
370 ber_init_w_nullc( BerElement *ber, int options )
372 (void) memset( (char *)ber, '\0', sizeof( BerElement ));
373 ber->ber_tag = LBER_DEFAULT;
374 ber->ber_options = (char) options;
377 /* New C-API ber_init() */
378 /* This function constructs a BerElement containing a copy
379 ** of the data in the bv argument.
382 ber_init( struct berval *bv )
390 ber = ber_alloc_t( 0 );
392 if( ber == NULLBER ) {
393 /* allocation failed */
398 if ( (ber_write ( ber, bv->bv_val, bv->bv_len, 0 )) != bv->bv_len ) {
399 /* write failed, so free and return NULL */
404 ber_reset( ber, 1 ); /* reset the pointer to the start of the buffer */
409 /* New C-API ber_flatten routine */
410 /* This routine allocates a struct berval whose contents are a BER
411 ** encoding taken from the ber argument. The bvPtr pointer pointers to
412 ** the returned berval.
416 struct berval **bvPtr)
424 if ( (bv = malloc( sizeof(struct berval))) == NULL ) {
429 /* ber is null, create an empty berval */
434 /* copy the berval */
435 ptrdiff_t len = ber->ber_ptr - ber->ber_buf;
437 if ( (bv->bv_val = (char *) malloc( len + 1 )) == NULL ) {
442 SAFEMEMCPY( bv->bv_val, ber->ber_buf, (size_t)len );
443 bv->bv_val[len] = '\0';
452 ber_reset( BerElement *ber, int was_writing )
455 ber->ber_end = ber->ber_ptr;
456 ber->ber_ptr = ber->ber_buf;
458 ber->ber_ptr = ber->ber_end;
461 ber->ber_rwptr = NULL;
468 ber_dump( BerElement *ber, int inout )
470 fprintf( stderr, "ber_dump: buf 0x%lx, ptr 0x%lx, end 0x%lx\n",
473 (long) ber->ber_end );
475 fprintf( stderr, " current len %ld, contents:\n",
476 (long) (ber->ber_end - ber->ber_ptr) );
477 lber_bprint( ber->ber_ptr, ber->ber_end - ber->ber_ptr );
479 fprintf( stderr, " current len %ld, contents:\n",
480 (long) (ber->ber_ptr - ber->ber_buf) );
481 lber_bprint( ber->ber_buf, ber->ber_ptr - ber->ber_buf );
486 ber_sos_dump( Seqorset *sos )
488 fprintf( stderr, "*** sos dump ***\n" );
489 while ( sos != NULLSEQORSET ) {
490 fprintf( stderr, "ber_sos_dump: clen %ld first 0x%lx ptr 0x%lx\n",
491 (long) sos->sos_clen, (long) sos->sos_first, (long) sos->sos_ptr );
492 fprintf( stderr, " current len %ld contents:\n",
493 (long) (sos->sos_ptr - sos->sos_first) );
494 lber_bprint( sos->sos_first, sos->sos_ptr - sos->sos_first );
498 fprintf( stderr, "*** end dump ***\n" );
503 /* return the tag - LBER_DEFAULT returned means trouble */
505 get_tag( Sockbuf *sb )
512 if ( BerRead( sb, (char *) &xbyte, 1 ) != 1 )
513 return( LBER_DEFAULT );
515 if ( (xbyte & LBER_BIG_TAG_MASK) != LBER_BIG_TAG_MASK )
516 return( (unsigned long) xbyte );
518 tagp = (char *) &tag;
520 for ( i = 1; i < sizeof(long); i++ ) {
521 if ( BerRead( sb, (char *) &xbyte, 1 ) != 1 )
522 return( LBER_DEFAULT );
526 if ( ! (xbyte & LBER_MORE_TAG_MASK) )
531 if ( i == sizeof(long) )
532 return( LBER_DEFAULT );
534 /* want leading, not trailing 0's */
535 return( tag >> (sizeof(long) - i - 1) );
539 ber_get_next( Sockbuf *sb, unsigned long *len, BerElement *ber )
541 unsigned long tag = 0, netlen, toread;
549 fprintf( stderr, "ber_get_next\n" );
553 * Any ber element looks like this: tag length contents.
554 * Assuming everything's ok, we return the tag byte (we
555 * can assume a single byte), return the length in len,
556 * and the rest of the undecoded element in buf.
559 * 1) small tags (less than 128)
560 * 2) definite lengths
561 * 3) primitive encodings used whenever possible
565 * first time through - malloc the buffer, set up ptrs, and
566 * read the tag and the length and as much of the rest as we can
569 if ( ber->ber_rwptr == NULL ) {
571 * First, we read the tag.
574 if ( (tag = get_tag( sb )) == LBER_DEFAULT ) {
575 return( LBER_DEFAULT );
580 * Next, read the length. The first byte contains the length
581 * of the length. If bit 8 is set, the length is the long
582 * form, otherwise it's the short form. We don't allow a
583 * length that's greater than what we can hold in an unsigned
588 if ( BerRead( sb, (char *) &lc, 1 ) != 1 ) {
589 return( LBER_DEFAULT );
592 noctets = (lc & 0x7f);
593 if ( noctets > sizeof(unsigned long) )
594 return( LBER_DEFAULT );
595 diff = sizeof(unsigned long) - noctets;
596 if ( BerRead( sb, (char *) &netlen + diff, noctets ) !=
598 return( LBER_DEFAULT );
600 *len = AC_NTOHL( netlen );
607 * Finally, malloc a buffer for the contents and read it in.
608 * It's this buffer that's passed to all the other ber decoding
612 #if defined( DOS ) && !defined( _WIN32 )
613 if ( *len > 65535 ) { /* DOS can't allocate > 64K */
614 return( LBER_DEFAULT );
616 #endif /* DOS && !_WIN32 */
618 if ( ( sb->sb_options & LBER_MAX_INCOMING_SIZE ) &&
619 *len > (unsigned long) sb->sb_max_incoming ) {
620 return( LBER_DEFAULT );
623 if ( (ber->ber_buf = (char *) malloc( (size_t)*len )) == NULL ) {
624 return( LBER_DEFAULT );
626 ber->ber_ptr = ber->ber_buf;
627 ber->ber_end = ber->ber_buf + *len;
628 ber->ber_rwptr = ber->ber_buf;
631 toread = (unsigned long)ber->ber_end - (unsigned long)ber->ber_rwptr;
633 if ( (rc = BerRead( sb, ber->ber_rwptr, (long)toread )) <= 0 ) {
634 return( LBER_DEFAULT );
638 ber->ber_rwptr += rc;
639 } while ( toread > 0 );
643 fprintf( stderr, "ber_get_next: tag 0x%lx len %ld contents:\n",
645 if ( lber_debug > 1 )
651 ber->ber_rwptr = NULL;
652 return( ber->ber_tag );