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 */
31 #endif /* next || vms */
33 #include <sys/types.h>
34 #include <sys/socket.h>
35 #include <netinet/in.h>
53 static int ber_realloc( BerElement *ber, unsigned long len );
54 static int ber_filbuf( Sockbuf *sb, long len );
55 static long BerRead( Sockbuf *sb, char *buf, long len );
57 static int BerWrite( Sockbuf *sb, char *buf, long len );
62 static int ber_realloc();
63 #endif /* NEEDPROTOS */
65 #define bergetc( sb, len ) ( sb->sb_ber.ber_end > sb->sb_ber.ber_ptr ? \
66 (unsigned char)*sb->sb_ber.ber_ptr++ : \
67 ber_filbuf( sb, len ))
71 * MacTCP/OpenTransport
73 #define read( s, b, l ) tcpread( s, 0, (unsigned char *)b, l, NULL )
74 #define MAX_WRITE 65535
75 #define BerWrite( sb, b, l ) tcpwrite( sb->sb_sd, (unsigned char *)(b), (l<MAX_WRITE)? l : MAX_WRITE )
82 #define read( s, b, l ) recv( s, b, l, 0 )
83 #define BerWrite( s, b, l ) send( s->sb_sd, b, (int) l, 0 )
87 * NCSA Telnet TCP/IP stack (under DOS)
89 #define read( s, b, l ) nread( s, b, l )
90 #define BerWrite( s, b, l ) netwrite( s->sb_sd, b, l )
94 * Windows Socket API (under DOS/Windows 3.x)
96 #define read( s, b, l ) recv( s, b, l, 0 )
97 #define BerWrite( s, b, l ) send( s->sb_sd, b, l, 0 )
102 * 32-bit Windows Socket API (under Windows NT or Windows 95)
104 #define read( s, b, l ) recv( s, b, l, 0 )
105 #define BerWrite( s, b, l ) send( s->sb_sd, b, l, 0 )
109 * VMS -- each write must be 64K or smaller
111 #define MAX_WRITE 65535
112 #define BerWrite( sb, b, l ) write( sb->sb_sd, b, (l<MAX_WRITE)? l : MAX_WRITE)
115 * everything else (Unix/BSD 4.3 socket API)
117 #define BerWrite( sb, b, l ) write( sb->sb_sd, b, l )
119 #define udp_read( sb, b, l, al ) recvfrom(sb->sb_sd, (char *)b, l, 0, \
120 (struct sockaddr *)sb->sb_fromaddr, \
121 (al = sizeof(struct sockaddr), &al))
122 #define udp_write( sb, b, l ) sendto(sb->sb_sd, (char *)(b), l, 0, \
123 (struct sockaddr *)sb->sb_useaddr, sizeof(struct sockaddr))
129 #define udp_read( sb, b, l, al ) CLDAP NOT SUPPORTED
130 #define udp_write( sb, b, l ) CLDAP NOT SUPPORTED
131 #endif /* udp_read */
133 #define EXBUFSIZ 1024
136 ber_filbuf( Sockbuf *sb, long len )
143 if ( sb->sb_ber.ber_buf == NULL ) {
144 if ( (sb->sb_ber.ber_buf = (char *) malloc( READBUFSIZ )) ==
147 sb->sb_ber.ber_ptr = sb->sb_ber.ber_buf;
148 sb->sb_ber.ber_end = sb->sb_ber.ber_buf;
151 if ( sb->sb_naddr > 0 ) {
153 rc = udp_read(sb, sb->sb_ber.ber_buf, READBUFSIZ, addrlen );
156 fprintf( stderr, "ber_filbuf udp_read %d bytes\n",
158 if ( lber_debug > 1 && rc > 0 )
159 lber_bprint( sb->sb_ber.ber_buf, rc );
161 #endif /* LDAP_DEBUG */
166 rc = read( sb->sb_sd, sb->sb_ber.ber_buf,
167 ((sb->sb_options & LBER_NO_READ_AHEAD) &&
168 (len < READBUFSIZ)) ?
173 sb->sb_ber.ber_ptr = sb->sb_ber.ber_buf + 1;
174 sb->sb_ber.ber_end = sb->sb_ber.ber_buf + rc;
175 return( (unsigned char)*sb->sb_ber.ber_buf );
183 BerRead( Sockbuf *sb, char *buf, long len )
189 if ( (c = bergetc( sb, len )) < 0 ) {
204 ber_read( BerElement *ber, char *buf, unsigned long len )
206 unsigned long actuallen, nleft;
208 nleft = ber->ber_end - ber->ber_ptr;
209 actuallen = nleft < len ? nleft : len;
211 SAFEMEMCPY( buf, ber->ber_ptr, (size_t)actuallen );
213 ber->ber_ptr += actuallen;
215 return( (long)actuallen );
219 ber_write( BerElement *ber, char *buf, unsigned long len, int nosos )
221 if ( nosos || ber->ber_sos == NULL ) {
222 if ( ber->ber_ptr + len > ber->ber_end ) {
223 if ( ber_realloc( ber, len ) != 0 )
226 SAFEMEMCPY( ber->ber_ptr, buf, (size_t)len );
230 if ( ber->ber_sos->sos_ptr + len > ber->ber_end ) {
231 if ( ber_realloc( ber, len ) != 0 )
234 SAFEMEMCPY( ber->ber_sos->sos_ptr, buf, (size_t)len );
235 ber->ber_sos->sos_ptr += len;
236 ber->ber_sos->sos_clen += len;
242 ber_realloc( BerElement *ber, unsigned long len )
244 unsigned long need, have, total;
249 have = (ber->ber_end - ber->ber_buf) / EXBUFSIZ;
250 need = (len < EXBUFSIZ ? 1 : (len + (EXBUFSIZ - 1)) / EXBUFSIZ);
251 total = have * EXBUFSIZ + need * EXBUFSIZ;
253 oldbuf = ber->ber_buf;
255 if ( ber->ber_buf == NULL ) {
256 if ( (ber->ber_buf = (char *) malloc( (size_t)total )) == NULL )
258 } else if ( (ber->ber_buf = (char *) realloc( ber->ber_buf,
259 (size_t)total )) == NULL )
262 ber->ber_end = ber->ber_buf + total;
265 * If the stinking thing was moved, we need to go through and
266 * reset all the sos and ber pointers. Offsets would've been
267 * a better idea... oh well.
270 if ( ber->ber_buf != oldbuf ) {
271 ber->ber_ptr = ber->ber_buf + (ber->ber_ptr - oldbuf);
273 for ( s = ber->ber_sos; s != NULLSEQORSET; s = s->sos_next ) {
274 off = s->sos_first - oldbuf;
275 s->sos_first = ber->ber_buf + off;
277 off = s->sos_ptr - oldbuf;
278 s->sos_ptr = ber->ber_buf + off;
286 ber_free( BerElement *ber, int freebuf )
288 if ( freebuf && ber->ber_buf != NULL )
289 free( ber->ber_buf );
290 free( (char *) ber );
294 ber_flush( Sockbuf *sb, BerElement *ber, int freeit )
296 long nwritten, towrite, rc;
298 if ( ber->ber_rwptr == NULL ) {
299 ber->ber_rwptr = ber->ber_buf;
301 towrite = ber->ber_ptr - ber->ber_rwptr;
305 fprintf( stderr, "ber_flush: %ld bytes to sd %ld%s\n", towrite,
306 sb->sb_sd, ber->ber_rwptr != ber->ber_buf ? " (re-flush)"
308 if ( lber_debug > 1 )
309 lber_bprint( ber->ber_rwptr, towrite );
312 #if !defined(MACOS) && !defined(DOS)
313 if ( sb->sb_options & (LBER_TO_FILE | LBER_TO_FILE_ONLY) ) {
314 rc = write( sb->sb_fd, ber->ber_buf, towrite );
315 if ( sb->sb_options & LBER_TO_FILE_ONLY ) {
323 if (sb->sb_naddr > 0) {
325 rc = udp_write( sb, ber->ber_buf + nwritten,
332 /* fake error if write was not atomic */
334 #if !defined( MACOS ) && !defined( DOS )
340 if ( (rc = BerWrite( sb, ber->ber_rwptr,
341 (size_t) towrite )) <= 0 ) {
347 ber->ber_rwptr += rc;
348 } while ( towrite > 0 );
357 ber_alloc_t( int options )
361 if ( (ber = (BerElement *) calloc( 1, sizeof(BerElement) )) == NULLBER )
363 ber->ber_tag = LBER_DEFAULT;
364 ber->ber_options = options;
372 return( ber_alloc_t( 0 ) );
378 return( ber_alloc_t( LBER_USE_DER ) );
382 ber_dup( BerElement *ber )
386 if ( (new = ber_alloc()) == NULLBER )
396 ber_init( BerElement *ber, int options )
398 (void) memset( (char *)ber, '\0', sizeof( BerElement ));
399 ber->ber_tag = LBER_DEFAULT;
400 ber->ber_options = options;
405 ber_reset( BerElement *ber, int was_writing )
408 ber->ber_end = ber->ber_ptr;
409 ber->ber_ptr = ber->ber_buf;
411 ber->ber_ptr = ber->ber_end;
414 ber->ber_rwptr = NULL;
421 ber_dump( BerElement *ber, int inout )
423 fprintf( stderr, "ber_dump: buf 0x%lx, ptr 0x%lx, end 0x%lx\n",
424 ber->ber_buf, ber->ber_ptr, ber->ber_end );
426 fprintf( stderr, " current len %ld, contents:\n",
427 ber->ber_end - ber->ber_ptr );
428 lber_bprint( ber->ber_ptr, ber->ber_end - ber->ber_ptr );
430 fprintf( stderr, " current len %ld, contents:\n",
431 ber->ber_ptr - ber->ber_buf );
432 lber_bprint( ber->ber_buf, ber->ber_ptr - ber->ber_buf );
437 ber_sos_dump( Seqorset *sos )
439 fprintf( stderr, "*** sos dump ***\n" );
440 while ( sos != NULLSEQORSET ) {
441 fprintf( stderr, "ber_sos_dump: clen %ld first 0x%lx ptr 0x%lx\n",
442 sos->sos_clen, sos->sos_first, sos->sos_ptr );
443 fprintf( stderr, " current len %ld contents:\n",
444 sos->sos_ptr - sos->sos_first );
445 lber_bprint( sos->sos_first, sos->sos_ptr - sos->sos_first );
449 fprintf( stderr, "*** end dump ***\n" );
454 /* return the tag - LBER_DEFAULT returned means trouble */
456 get_tag( Sockbuf *sb )
463 if ( BerRead( sb, (char *) &xbyte, 1 ) != 1 )
464 return( LBER_DEFAULT );
466 if ( (xbyte & LBER_BIG_TAG_MASK) != LBER_BIG_TAG_MASK )
467 return( (unsigned long) xbyte );
469 tagp = (char *) &tag;
471 for ( i = 1; i < sizeof(long); i++ ) {
472 if ( BerRead( sb, (char *) &xbyte, 1 ) != 1 )
473 return( LBER_DEFAULT );
477 if ( ! (xbyte & LBER_MORE_TAG_MASK) )
482 if ( i == sizeof(long) )
483 return( LBER_DEFAULT );
485 /* want leading, not trailing 0's */
486 return( tag >> (sizeof(long) - i - 1) );
490 ber_get_next( Sockbuf *sb, unsigned long *len, BerElement *ber )
492 unsigned long tag, netlen, toread;
499 fprintf( stderr, "ber_get_next\n" );
503 * Any ber element looks like this: tag length contents.
504 * Assuming everything's ok, we return the tag byte (we
505 * can assume a single byte), return the length in len,
506 * and the rest of the undecoded element in buf.
509 * 1) small tags (less than 128)
510 * 2) definite lengths
511 * 3) primitive encodings used whenever possible
515 * first time through - malloc the buffer, set up ptrs, and
516 * read the tag and the length and as much of the rest as we can
519 if ( ber->ber_rwptr == NULL ) {
521 * First, we read the tag.
524 if ( (tag = get_tag( sb )) == LBER_DEFAULT ) {
525 return( LBER_DEFAULT );
530 * Next, read the length. The first byte contains the length
531 * of the length. If bit 8 is set, the length is the long
532 * form, otherwise it's the short form. We don't allow a
533 * length that's greater than what we can hold in an unsigned
538 if ( BerRead( sb, (char *) &lc, 1 ) != 1 ) {
539 return( LBER_DEFAULT );
542 noctets = (lc & 0x7f);
543 if ( noctets > sizeof(unsigned long) )
544 return( LBER_DEFAULT );
545 diff = sizeof(unsigned long) - noctets;
546 if ( BerRead( sb, (char *) &netlen + diff, noctets ) !=
548 return( LBER_DEFAULT );
550 *len = LBER_NTOHL( netlen );
557 * Finally, malloc a buffer for the contents and read it in.
558 * It's this buffer that's passed to all the other ber decoding
562 #if defined( DOS ) && !defined( _WIN32 )
563 if ( *len > 65535 ) { /* DOS can't allocate > 64K */
564 return( LBER_DEFAULT );
566 #endif /* DOS && !_WIN32 */
568 if ( ( sb->sb_options & LBER_MAX_INCOMING_SIZE ) &&
569 *len > sb->sb_max_incoming ) {
570 return( LBER_DEFAULT );
573 if ( (ber->ber_buf = (char *) malloc( (size_t)*len )) == NULL ) {
574 return( LBER_DEFAULT );
576 ber->ber_ptr = ber->ber_buf;
577 ber->ber_end = ber->ber_buf + *len;
578 ber->ber_rwptr = ber->ber_buf;
581 toread = (unsigned long)ber->ber_end - (unsigned long)ber->ber_rwptr;
583 if ( (rc = BerRead( sb, ber->ber_rwptr, (long)toread )) <= 0 ) {
584 return( LBER_DEFAULT );
588 ber->ber_rwptr += rc;
589 } while ( toread > 0 );
593 fprintf( stderr, "ber_get_next: tag 0x%lx len %ld contents:\n",
595 if ( lber_debug > 1 )
601 ber->ber_rwptr = NULL;
602 return( ber->ber_tag );