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.
14 #define DISABLE_BRIDGE
20 #include <ac/string.h>
24 #if defined( DOS ) || defined( _WIN32 )
26 #endif /* DOS || _WIN32 */
32 #include <sys/types.h>
33 #include <sys/socket.h>
34 #include <netinet/in.h>
47 static int ber_realloc LDAP_P(( BerElement *ber, unsigned long len ));
48 static int ber_filbuf LDAP_P(( Sockbuf *sb, long len ));
49 static long BerRead LDAP_P(( Sockbuf *sb, char *buf, long len ));
51 static int BerWrite LDAP_P(( Sockbuf *sb, char *buf, long len ));
54 #define bergetc( sb, len ) ( sb->sb_ber.ber_end > sb->sb_ber.ber_ptr ? \
55 (unsigned char)*sb->sb_ber.ber_ptr++ : \
56 ber_filbuf( sb, len ))
60 * MacTCP/OpenTransport
62 #define read( s, b, l ) tcpread( s, 0, (unsigned char *)b, l, NULL )
63 #define MAX_WRITE 65535
64 #define BerWrite( sb, b, l ) tcpwrite( sb->sb_sd, (unsigned char *)(b), (l<MAX_WRITE)? l : MAX_WRITE )
71 #define read( s, b, l ) recv( s, b, l, 0 )
72 #define BerWrite( s, b, l ) send( s->sb_sd, b, (int) l, 0 )
76 * NCSA Telnet TCP/IP stack (under DOS)
78 #define read( s, b, l ) nread( s, b, l )
79 #define BerWrite( s, b, l ) netwrite( s->sb_sd, b, l )
83 * Windows Socket API (under DOS/Windows 3.x)
85 #define read( s, b, l ) recv( s, b, l, 0 )
86 #define BerWrite( s, b, l ) send( s->sb_sd, b, l, 0 )
91 * 32-bit Windows Socket API (under Windows NT or Windows 95)
93 #define read( s, b, l ) recv( s, b, l, 0 )
94 #define BerWrite( s, b, l ) send( s->sb_sd, b, l, 0 )
98 * VMS -- each write must be 64K or smaller
100 #define MAX_WRITE 65535
101 #define BerWrite( sb, b, l ) write( sb->sb_sd, b, (l<MAX_WRITE)? l : MAX_WRITE)
104 * everything else (Unix/BSD 4.3 socket API)
106 #define BerWrite( sb, b, l ) write( sb->sb_sd, b, l )
108 #define udp_read( sb, b, l, al ) recvfrom(sb->sb_sd, (char *)b, l, 0, \
109 (struct sockaddr *)sb->sb_fromaddr, \
110 (al = sizeof(struct sockaddr), &al))
111 #define udp_write( sb, b, l ) sendto(sb->sb_sd, (char *)(b), l, 0, \
112 (struct sockaddr *)sb->sb_useaddr, sizeof(struct sockaddr))
118 #define udp_read( sb, b, l, al ) CLDAP NOT SUPPORTED
119 #define udp_write( sb, b, l ) CLDAP NOT SUPPORTED
120 #endif /* udp_read */
122 #define EXBUFSIZ 1024
125 ber_filbuf( Sockbuf *sb, long len )
132 if ( sb->sb_ber.ber_buf == NULL ) {
133 if ( (sb->sb_ber.ber_buf = (char *) malloc( READBUFSIZ )) ==
136 sb->sb_ber.ber_ptr = sb->sb_ber.ber_buf;
137 sb->sb_ber.ber_end = sb->sb_ber.ber_buf;
140 if ( sb->sb_naddr > 0 ) {
142 rc = udp_read(sb, sb->sb_ber.ber_buf, READBUFSIZ, addrlen );
145 fprintf( stderr, "ber_filbuf udp_read %d bytes\n",
147 if ( lber_debug > 1 && rc > 0 )
148 lber_bprint( sb->sb_ber.ber_buf, rc );
150 #endif /* LDAP_DEBUG */
155 rc = read( sb->sb_sd, sb->sb_ber.ber_buf,
156 ((sb->sb_options & LBER_NO_READ_AHEAD) &&
157 (len < READBUFSIZ)) ?
162 sb->sb_ber.ber_ptr = sb->sb_ber.ber_buf + 1;
163 sb->sb_ber.ber_end = sb->sb_ber.ber_buf + rc;
164 return( (unsigned char)*sb->sb_ber.ber_buf );
172 BerRead( Sockbuf *sb, char *buf, long len )
178 if ( (c = bergetc( sb, len )) < 0 ) {
193 ber_read( BerElement *ber, char *buf, unsigned long len )
195 unsigned long actuallen, nleft;
197 nleft = ber->ber_end - ber->ber_ptr;
198 actuallen = nleft < len ? nleft : len;
200 SAFEMEMCPY( buf, ber->ber_ptr, (size_t)actuallen );
202 ber->ber_ptr += actuallen;
204 return( (long)actuallen );
208 ber_write( BerElement *ber, char *buf, unsigned long len, int nosos )
210 if ( nosos || ber->ber_sos == NULL ) {
211 if ( ber->ber_ptr + len > ber->ber_end ) {
212 if ( ber_realloc( ber, len ) != 0 )
215 SAFEMEMCPY( ber->ber_ptr, buf, (size_t)len );
219 if ( ber->ber_sos->sos_ptr + len > ber->ber_end ) {
220 if ( ber_realloc( ber, len ) != 0 )
223 SAFEMEMCPY( ber->ber_sos->sos_ptr, buf, (size_t)len );
224 ber->ber_sos->sos_ptr += len;
225 ber->ber_sos->sos_clen += len;
231 ber_realloc( BerElement *ber, unsigned long len )
233 unsigned long need, have, total;
238 have = (ber->ber_end - ber->ber_buf) / EXBUFSIZ;
239 need = (len < EXBUFSIZ ? 1 : (len + (EXBUFSIZ - 1)) / EXBUFSIZ);
240 total = have * EXBUFSIZ + need * EXBUFSIZ;
242 oldbuf = ber->ber_buf;
244 if ( ber->ber_buf == NULL ) {
245 if ( (ber->ber_buf = (char *) malloc( (size_t)total )) == NULL )
247 } else if ( (ber->ber_buf = (char *) realloc( ber->ber_buf,
248 (size_t)total )) == NULL )
251 ber->ber_end = ber->ber_buf + total;
254 * If the stinking thing was moved, we need to go through and
255 * reset all the sos and ber pointers. Offsets would've been
256 * a better idea... oh well.
259 if ( ber->ber_buf != oldbuf ) {
260 ber->ber_ptr = ber->ber_buf + (ber->ber_ptr - oldbuf);
262 for ( s = ber->ber_sos; s != NULLSEQORSET; s = s->sos_next ) {
263 off = s->sos_first - oldbuf;
264 s->sos_first = ber->ber_buf + off;
266 off = s->sos_ptr - oldbuf;
267 s->sos_ptr = ber->ber_buf + off;
275 ber_free( BerElement *ber, int freebuf )
277 if ( freebuf && ber->ber_buf != NULL )
278 free( ber->ber_buf );
279 free( (char *) ber );
283 ber_flush( Sockbuf *sb, BerElement *ber, int freeit )
285 long nwritten, towrite, rc;
287 if ( ber->ber_rwptr == NULL ) {
288 ber->ber_rwptr = ber->ber_buf;
290 towrite = ber->ber_ptr - ber->ber_rwptr;
294 fprintf( stderr, "ber_flush: %ld bytes to sd %ld%s\n", towrite,
295 (long) sb->sb_sd, ber->ber_rwptr != ber->ber_buf ? " (re-flush)"
297 if ( lber_debug > 1 )
298 lber_bprint( ber->ber_rwptr, towrite );
301 #if !defined(MACOS) && !defined(DOS)
302 if ( sb->sb_options & (LBER_TO_FILE | LBER_TO_FILE_ONLY) ) {
303 rc = write( sb->sb_fd, ber->ber_buf, towrite );
304 if ( sb->sb_options & LBER_TO_FILE_ONLY ) {
312 if (sb->sb_naddr > 0) {
314 rc = udp_write( sb, ber->ber_buf + nwritten,
321 /* fake error if write was not atomic */
323 #if !defined( MACOS ) && !defined( DOS )
329 if ( (rc = BerWrite( sb, ber->ber_rwptr,
330 (size_t) towrite )) <= 0 ) {
336 ber->ber_rwptr += rc;
337 } while ( towrite > 0 );
346 ber_alloc_t( int options )
350 if ( (ber = (BerElement *) calloc( 1, sizeof(BerElement) )) == NULLBER )
352 ber->ber_tag = LBER_DEFAULT;
353 ber->ber_options = options;
361 return( ber_alloc_t( 0 ) );
367 return( ber_alloc_t( LBER_USE_DER ) );
371 ber_dup( BerElement *ber )
375 if ( (new = ber_alloc()) == NULLBER )
385 ber_init( BerElement *ber, int options )
387 (void) memset( (char *)ber, '\0', sizeof( BerElement ));
388 ber->ber_tag = LBER_DEFAULT;
389 ber->ber_options = options;
394 ber_reset( BerElement *ber, int was_writing )
397 ber->ber_end = ber->ber_ptr;
398 ber->ber_ptr = ber->ber_buf;
400 ber->ber_ptr = ber->ber_end;
403 ber->ber_rwptr = NULL;
410 ber_dump( BerElement *ber, int inout )
412 fprintf( stderr, "ber_dump: buf 0x%lx, ptr 0x%lx, end 0x%lx\n",
415 (long) ber->ber_end );
417 fprintf( stderr, " current len %ld, contents:\n",
418 (long) (ber->ber_end - ber->ber_ptr) );
419 lber_bprint( ber->ber_ptr, ber->ber_end - ber->ber_ptr );
421 fprintf( stderr, " current len %ld, contents:\n",
422 (long) (ber->ber_ptr - ber->ber_buf) );
423 lber_bprint( ber->ber_buf, ber->ber_ptr - ber->ber_buf );
428 ber_sos_dump( Seqorset *sos )
430 fprintf( stderr, "*** sos dump ***\n" );
431 while ( sos != NULLSEQORSET ) {
432 fprintf( stderr, "ber_sos_dump: clen %ld first 0x%lx ptr 0x%lx\n",
433 (long) sos->sos_clen, (long) sos->sos_first, (long) sos->sos_ptr );
434 fprintf( stderr, " current len %ld contents:\n",
435 (long) (sos->sos_ptr - sos->sos_first) );
436 lber_bprint( sos->sos_first, sos->sos_ptr - sos->sos_first );
440 fprintf( stderr, "*** end dump ***\n" );
445 /* return the tag - LBER_DEFAULT returned means trouble */
447 get_tag( Sockbuf *sb )
454 if ( BerRead( sb, (char *) &xbyte, 1 ) != 1 )
455 return( LBER_DEFAULT );
457 if ( (xbyte & LBER_BIG_TAG_MASK) != LBER_BIG_TAG_MASK )
458 return( (unsigned long) xbyte );
460 tagp = (char *) &tag;
462 for ( i = 1; i < sizeof(long); i++ ) {
463 if ( BerRead( sb, (char *) &xbyte, 1 ) != 1 )
464 return( LBER_DEFAULT );
468 if ( ! (xbyte & LBER_MORE_TAG_MASK) )
473 if ( i == sizeof(long) )
474 return( LBER_DEFAULT );
476 /* want leading, not trailing 0's */
477 return( tag >> (sizeof(long) - i - 1) );
481 ber_get_next( Sockbuf *sb, unsigned long *len, BerElement *ber )
483 unsigned long tag = 0, netlen, toread;
490 fprintf( stderr, "ber_get_next\n" );
494 * Any ber element looks like this: tag length contents.
495 * Assuming everything's ok, we return the tag byte (we
496 * can assume a single byte), return the length in len,
497 * and the rest of the undecoded element in buf.
500 * 1) small tags (less than 128)
501 * 2) definite lengths
502 * 3) primitive encodings used whenever possible
506 * first time through - malloc the buffer, set up ptrs, and
507 * read the tag and the length and as much of the rest as we can
510 if ( ber->ber_rwptr == NULL ) {
512 * First, we read the tag.
515 if ( (tag = get_tag( sb )) == LBER_DEFAULT ) {
516 return( LBER_DEFAULT );
521 * Next, read the length. The first byte contains the length
522 * of the length. If bit 8 is set, the length is the long
523 * form, otherwise it's the short form. We don't allow a
524 * length that's greater than what we can hold in an unsigned
529 if ( BerRead( sb, (char *) &lc, 1 ) != 1 ) {
530 return( LBER_DEFAULT );
533 noctets = (lc & 0x7f);
534 if ( noctets > sizeof(unsigned long) )
535 return( LBER_DEFAULT );
536 diff = sizeof(unsigned long) - noctets;
537 if ( BerRead( sb, (char *) &netlen + diff, noctets ) !=
539 return( LBER_DEFAULT );
541 *len = LBER_NTOHL( netlen );
548 * Finally, malloc a buffer for the contents and read it in.
549 * It's this buffer that's passed to all the other ber decoding
553 #if defined( DOS ) && !defined( _WIN32 )
554 if ( *len > 65535 ) { /* DOS can't allocate > 64K */
555 return( LBER_DEFAULT );
557 #endif /* DOS && !_WIN32 */
559 if ( ( sb->sb_options & LBER_MAX_INCOMING_SIZE ) &&
560 *len > sb->sb_max_incoming ) {
561 return( LBER_DEFAULT );
564 if ( (ber->ber_buf = (char *) malloc( (size_t)*len )) == NULL ) {
565 return( LBER_DEFAULT );
567 ber->ber_ptr = ber->ber_buf;
568 ber->ber_end = ber->ber_buf + *len;
569 ber->ber_rwptr = ber->ber_buf;
572 toread = (unsigned long)ber->ber_end - (unsigned long)ber->ber_rwptr;
574 if ( (rc = BerRead( sb, ber->ber_rwptr, (long)toread )) <= 0 ) {
575 return( LBER_DEFAULT );
579 ber->ber_rwptr += rc;
580 } while ( toread > 0 );
584 fprintf( stderr, "ber_get_next: tag 0x%lx len %ld contents:\n",
586 if ( lber_debug > 1 )
592 ber->ber_rwptr = NULL;
593 return( ber->ber_tag );