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.
17 #if defined( DOS ) || defined( _WIN32 )
19 #endif /* DOS || _WIN32 */
25 #if defined(NeXT) || defined(VMS)
27 #else /* next || vms */
29 #endif /* next || vms */
31 #include <sys/types.h>
32 #include <sys/socket.h>
33 #include <netinet/in.h>
51 static int ber_realloc( BerElement *ber, unsigned long len );
52 static int ber_filbuf( Sockbuf *sb, long len );
53 static long BerRead( Sockbuf *sb, char *buf, long len );
55 static int BerWrite( Sockbuf *sb, char *buf, long len );
60 static int ber_realloc();
61 #endif /* NEEDPROTOS */
63 #define bergetc( sb, len ) ( sb->sb_ber.ber_end > sb->sb_ber.ber_ptr ? \
64 (unsigned char)*sb->sb_ber.ber_ptr++ : \
65 ber_filbuf( sb, len ))
69 * MacTCP/OpenTransport
71 #define read( s, b, l ) tcpread( s, 0, (unsigned char *)b, l, NULL )
72 #define MAX_WRITE 65535
73 #define BerWrite( sb, b, l ) tcpwrite( sb->sb_sd, (unsigned char *)(b), (l<MAX_WRITE)? l : MAX_WRITE )
80 #define read( s, b, l ) recv( s, b, l, 0 )
81 #define BerWrite( s, b, l ) send( s->sb_sd, b, (int) l, 0 )
85 * NCSA Telnet TCP/IP stack (under DOS)
87 #define read( s, b, l ) nread( s, b, l )
88 #define BerWrite( s, b, l ) netwrite( s->sb_sd, b, l )
92 * Windows Socket API (under DOS/Windows 3.x)
94 #define read( s, b, l ) recv( s, b, l, 0 )
95 #define BerWrite( s, b, l ) send( s->sb_sd, b, l, 0 )
100 * 32-bit Windows Socket API (under Windows NT or Windows 95)
102 #define read( s, b, l ) recv( s, b, l, 0 )
103 #define BerWrite( s, b, l ) send( s->sb_sd, b, l, 0 )
107 * VMS -- each write must be 64K or smaller
109 #define MAX_WRITE 65535
110 #define BerWrite( sb, b, l ) write( sb->sb_sd, b, (l<MAX_WRITE)? l : MAX_WRITE)
113 * everything else (Unix/BSD 4.3 socket API)
115 #define BerWrite( sb, b, l ) write( sb->sb_sd, b, l )
117 #define udp_read( sb, b, l, al ) recvfrom(sb->sb_sd, (char *)b, l, 0, \
118 (struct sockaddr *)sb->sb_fromaddr, \
119 (al = sizeof(struct sockaddr), &al))
120 #define udp_write( sb, b, l ) sendto(sb->sb_sd, (char *)(b), l, 0, \
121 (struct sockaddr *)sb->sb_useaddr, sizeof(struct sockaddr))
127 #define udp_read( sb, b, l, al ) CLDAP NOT SUPPORTED
128 #define udp_write( sb, b, l ) CLDAP NOT SUPPORTED
129 #endif /* udp_read */
131 #define EXBUFSIZ 1024
134 ber_filbuf( Sockbuf *sb, long len )
141 if ( sb->sb_ber.ber_buf == NULL ) {
142 if ( (sb->sb_ber.ber_buf = (char *) malloc( READBUFSIZ )) ==
145 sb->sb_ber.ber_ptr = sb->sb_ber.ber_buf;
146 sb->sb_ber.ber_end = sb->sb_ber.ber_buf;
149 if ( sb->sb_naddr > 0 ) {
151 rc = udp_read(sb, sb->sb_ber.ber_buf, READBUFSIZ, addrlen );
154 fprintf( stderr, "ber_filbuf udp_read %d bytes\n",
156 if ( lber_debug > 1 && rc > 0 )
157 lber_bprint( sb->sb_ber.ber_buf, rc );
159 #endif /* LDAP_DEBUG */
164 rc = read( sb->sb_sd, sb->sb_ber.ber_buf,
165 ((sb->sb_options & LBER_NO_READ_AHEAD) &&
166 (len < READBUFSIZ)) ?
171 sb->sb_ber.ber_ptr = sb->sb_ber.ber_buf + 1;
172 sb->sb_ber.ber_end = sb->sb_ber.ber_buf + rc;
173 return( (unsigned char)*sb->sb_ber.ber_buf );
181 BerRead( Sockbuf *sb, char *buf, long len )
187 if ( (c = bergetc( sb, len )) < 0 ) {
202 ber_read( BerElement *ber, char *buf, unsigned long len )
204 unsigned long actuallen, nleft;
206 nleft = ber->ber_end - ber->ber_ptr;
207 actuallen = nleft < len ? nleft : len;
209 SAFEMEMCPY( buf, ber->ber_ptr, (size_t)actuallen );
211 ber->ber_ptr += actuallen;
213 return( (long)actuallen );
217 ber_write( BerElement *ber, char *buf, unsigned long len, int nosos )
219 if ( nosos || ber->ber_sos == NULL ) {
220 if ( ber->ber_ptr + len > ber->ber_end ) {
221 if ( ber_realloc( ber, len ) != 0 )
224 SAFEMEMCPY( ber->ber_ptr, buf, (size_t)len );
228 if ( ber->ber_sos->sos_ptr + len > ber->ber_end ) {
229 if ( ber_realloc( ber, len ) != 0 )
232 SAFEMEMCPY( ber->ber_sos->sos_ptr, buf, (size_t)len );
233 ber->ber_sos->sos_ptr += len;
234 ber->ber_sos->sos_clen += len;
240 ber_realloc( BerElement *ber, unsigned long len )
242 unsigned long need, have, total;
247 have = (ber->ber_end - ber->ber_buf) / EXBUFSIZ;
248 need = (len < EXBUFSIZ ? 1 : (len + (EXBUFSIZ - 1)) / EXBUFSIZ);
249 total = have * EXBUFSIZ + need * EXBUFSIZ;
251 oldbuf = ber->ber_buf;
253 if ( ber->ber_buf == NULL ) {
254 if ( (ber->ber_buf = (char *) malloc( (size_t)total )) == NULL )
256 } else if ( (ber->ber_buf = (char *) realloc( ber->ber_buf,
257 (size_t)total )) == NULL )
260 ber->ber_end = ber->ber_buf + total;
263 * If the stinking thing was moved, we need to go through and
264 * reset all the sos and ber pointers. Offsets would've been
265 * a better idea... oh well.
268 if ( ber->ber_buf != oldbuf ) {
269 ber->ber_ptr = ber->ber_buf + (ber->ber_ptr - oldbuf);
271 for ( s = ber->ber_sos; s != NULLSEQORSET; s = s->sos_next ) {
272 off = s->sos_first - oldbuf;
273 s->sos_first = ber->ber_buf + off;
275 off = s->sos_ptr - oldbuf;
276 s->sos_ptr = ber->ber_buf + off;
284 ber_free( BerElement *ber, int freebuf )
286 if ( freebuf && ber->ber_buf != NULL )
287 free( ber->ber_buf );
288 free( (char *) ber );
292 ber_flush( Sockbuf *sb, BerElement *ber, int freeit )
294 long nwritten, towrite, rc;
296 if ( ber->ber_rwptr == NULL ) {
297 ber->ber_rwptr = ber->ber_buf;
299 towrite = ber->ber_ptr - ber->ber_rwptr;
303 fprintf( stderr, "ber_flush: %ld bytes to sd %ld%s\n", towrite,
304 sb->sb_sd, ber->ber_rwptr != ber->ber_buf ? " (re-flush)"
306 if ( lber_debug > 1 )
307 lber_bprint( ber->ber_rwptr, towrite );
310 #if !defined(MACOS) && !defined(DOS)
311 if ( sb->sb_options & (LBER_TO_FILE | LBER_TO_FILE_ONLY) ) {
312 rc = write( sb->sb_fd, ber->ber_buf, towrite );
313 if ( sb->sb_options & LBER_TO_FILE_ONLY ) {
321 if (sb->sb_naddr > 0) {
323 rc = udp_write( sb, ber->ber_buf + nwritten,
330 /* fake error if write was not atomic */
332 #if !defined( MACOS ) && !defined( DOS )
338 if ( (rc = BerWrite( sb, ber->ber_rwptr,
339 (size_t) towrite )) <= 0 ) {
345 ber->ber_rwptr += rc;
346 } while ( towrite > 0 );
355 ber_alloc_t( int options )
359 if ( (ber = (BerElement *) calloc( 1, sizeof(BerElement) )) == NULLBER )
361 ber->ber_tag = LBER_DEFAULT;
362 ber->ber_options = options;
370 return( ber_alloc_t( 0 ) );
376 return( ber_alloc_t( LBER_USE_DER ) );
380 ber_dup( BerElement *ber )
384 if ( (new = ber_alloc()) == NULLBER )
394 ber_init( BerElement *ber, int options )
396 (void) memset( (char *)ber, '\0', sizeof( BerElement ));
397 ber->ber_tag = LBER_DEFAULT;
398 ber->ber_options = options;
403 ber_reset( BerElement *ber, int was_writing )
406 ber->ber_end = ber->ber_ptr;
407 ber->ber_ptr = ber->ber_buf;
409 ber->ber_ptr = ber->ber_end;
412 ber->ber_rwptr = NULL;
419 ber_dump( BerElement *ber, int inout )
421 fprintf( stderr, "ber_dump: buf 0x%lx, ptr 0x%lx, end 0x%lx\n",
422 ber->ber_buf, ber->ber_ptr, ber->ber_end );
424 fprintf( stderr, " current len %ld, contents:\n",
425 ber->ber_end - ber->ber_ptr );
426 lber_bprint( ber->ber_ptr, ber->ber_end - ber->ber_ptr );
428 fprintf( stderr, " current len %ld, contents:\n",
429 ber->ber_ptr - ber->ber_buf );
430 lber_bprint( ber->ber_buf, ber->ber_ptr - ber->ber_buf );
435 ber_sos_dump( Seqorset *sos )
437 fprintf( stderr, "*** sos dump ***\n" );
438 while ( sos != NULLSEQORSET ) {
439 fprintf( stderr, "ber_sos_dump: clen %ld first 0x%lx ptr 0x%lx\n",
440 sos->sos_clen, sos->sos_first, sos->sos_ptr );
441 fprintf( stderr, " current len %ld contents:\n",
442 sos->sos_ptr - sos->sos_first );
443 lber_bprint( sos->sos_first, sos->sos_ptr - sos->sos_first );
447 fprintf( stderr, "*** end dump ***\n" );
452 /* return the tag - LBER_DEFAULT returned means trouble */
454 get_tag( Sockbuf *sb )
461 if ( BerRead( sb, (char *) &xbyte, 1 ) != 1 )
462 return( LBER_DEFAULT );
464 if ( (xbyte & LBER_BIG_TAG_MASK) != LBER_BIG_TAG_MASK )
465 return( (unsigned long) xbyte );
467 tagp = (char *) &tag;
469 for ( i = 1; i < sizeof(long); i++ ) {
470 if ( BerRead( sb, (char *) &xbyte, 1 ) != 1 )
471 return( LBER_DEFAULT );
475 if ( ! (xbyte & LBER_MORE_TAG_MASK) )
480 if ( i == sizeof(long) )
481 return( LBER_DEFAULT );
483 /* want leading, not trailing 0's */
484 return( tag >> (sizeof(long) - i - 1) );
488 ber_get_next( Sockbuf *sb, unsigned long *len, BerElement *ber )
490 unsigned long tag, netlen, toread;
497 fprintf( stderr, "ber_get_next\n" );
501 * Any ber element looks like this: tag length contents.
502 * Assuming everything's ok, we return the tag byte (we
503 * can assume a single byte), return the length in len,
504 * and the rest of the undecoded element in buf.
507 * 1) small tags (less than 128)
508 * 2) definite lengths
509 * 3) primitive encodings used whenever possible
513 * first time through - malloc the buffer, set up ptrs, and
514 * read the tag and the length and as much of the rest as we can
517 if ( ber->ber_rwptr == NULL ) {
519 * First, we read the tag.
522 if ( (tag = get_tag( sb )) == LBER_DEFAULT ) {
523 return( LBER_DEFAULT );
528 * Next, read the length. The first byte contains the length
529 * of the length. If bit 8 is set, the length is the long
530 * form, otherwise it's the short form. We don't allow a
531 * length that's greater than what we can hold in an unsigned
536 if ( BerRead( sb, (char *) &lc, 1 ) != 1 ) {
537 return( LBER_DEFAULT );
540 noctets = (lc & 0x7f);
541 if ( noctets > sizeof(unsigned long) )
542 return( LBER_DEFAULT );
543 diff = sizeof(unsigned long) - noctets;
544 if ( BerRead( sb, (char *) &netlen + diff, noctets ) !=
546 return( LBER_DEFAULT );
548 *len = LBER_NTOHL( netlen );
555 * Finally, malloc a buffer for the contents and read it in.
556 * It's this buffer that's passed to all the other ber decoding
560 #if defined( DOS ) && !defined( _WIN32 )
561 if ( *len > 65535 ) { /* DOS can't allocate > 64K */
562 return( LBER_DEFAULT );
564 #endif /* DOS && !_WIN32 */
566 if ( ( sb->sb_options & LBER_MAX_INCOMING_SIZE ) &&
567 *len > sb->sb_max_incoming ) {
568 return( LBER_DEFAULT );
571 if ( (ber->ber_buf = (char *) malloc( (size_t)*len )) == NULL ) {
572 return( LBER_DEFAULT );
574 ber->ber_ptr = ber->ber_buf;
575 ber->ber_end = ber->ber_buf + *len;
576 ber->ber_rwptr = ber->ber_buf;
579 toread = (unsigned long)ber->ber_end - (unsigned long)ber->ber_rwptr;
581 if ( (rc = BerRead( sb, ber->ber_rwptr, (long)toread )) <= 0 ) {
582 return( LBER_DEFAULT );
586 ber->ber_rwptr += rc;
587 } while ( toread > 0 );
591 fprintf( stderr, "ber_get_next: tag 0x%lx len %ld contents:\n",
593 if ( lber_debug > 1 )
599 ber->ber_rwptr = NULL;
600 return( ber->ber_tag );