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.
19 #if defined( DOS ) || defined( _WIN32 )
21 #endif /* DOS || _WIN32 */
27 #include <sys/types.h>
28 #include <sys/socket.h>
29 #include <netinet/in.h>
47 static int ber_realloc( BerElement *ber, unsigned long len );
48 static int ber_filbuf( Sockbuf *sb, long len );
49 static long BerRead( Sockbuf *sb, char *buf, long len );
51 static int BerWrite( Sockbuf *sb, char *buf, long len );
56 static int ber_realloc();
57 #endif /* NEEDPROTOS */
59 #define bergetc( sb, len ) ( sb->sb_ber.ber_end > sb->sb_ber.ber_ptr ? \
60 (unsigned char)*sb->sb_ber.ber_ptr++ : \
61 ber_filbuf( sb, len ))
65 * MacTCP/OpenTransport
67 #define read( s, b, l ) tcpread( s, 0, (unsigned char *)b, l, NULL )
68 #define MAX_WRITE 65535
69 #define BerWrite( sb, b, l ) tcpwrite( sb->sb_sd, (unsigned char *)(b), (l<MAX_WRITE)? l : MAX_WRITE )
76 #define read( s, b, l ) recv( s, b, l, 0 )
77 #define BerWrite( s, b, l ) send( s->sb_sd, b, (int) l, 0 )
81 * NCSA Telnet TCP/IP stack (under DOS)
83 #define read( s, b, l ) nread( s, b, l )
84 #define BerWrite( s, b, l ) netwrite( s->sb_sd, b, l )
88 * Windows Socket API (under DOS/Windows 3.x)
90 #define read( s, b, l ) recv( s, b, l, 0 )
91 #define BerWrite( s, b, l ) send( s->sb_sd, b, l, 0 )
96 * 32-bit Windows Socket API (under Windows NT or Windows 95)
98 #define read( s, b, l ) recv( s, b, l, 0 )
99 #define BerWrite( s, b, l ) send( s->sb_sd, b, l, 0 )
103 * VMS -- each write must be 64K or smaller
105 #define MAX_WRITE 65535
106 #define BerWrite( sb, b, l ) write( sb->sb_sd, b, (l<MAX_WRITE)? l : MAX_WRITE)
109 * everything else (Unix/BSD 4.3 socket API)
111 #define BerWrite( sb, b, l ) write( sb->sb_sd, b, l )
113 #define udp_read( sb, b, l, al ) recvfrom(sb->sb_sd, (char *)b, l, 0, \
114 (struct sockaddr *)sb->sb_fromaddr, \
115 (al = sizeof(struct sockaddr), &al))
116 #define udp_write( sb, b, l ) sendto(sb->sb_sd, (char *)(b), l, 0, \
117 (struct sockaddr *)sb->sb_useaddr, sizeof(struct sockaddr))
123 #define udp_read( sb, b, l, al ) CLDAP NOT SUPPORTED
124 #define udp_write( sb, b, l ) CLDAP NOT SUPPORTED
125 #endif /* udp_read */
127 #define EXBUFSIZ 1024
130 ber_filbuf( Sockbuf *sb, long len )
137 if ( sb->sb_ber.ber_buf == NULL ) {
138 if ( (sb->sb_ber.ber_buf = (char *) malloc( READBUFSIZ )) ==
141 sb->sb_ber.ber_ptr = sb->sb_ber.ber_buf;
142 sb->sb_ber.ber_end = sb->sb_ber.ber_buf;
145 if ( sb->sb_naddr > 0 ) {
147 rc = udp_read(sb, sb->sb_ber.ber_buf, READBUFSIZ, addrlen );
150 fprintf( stderr, "ber_filbuf udp_read %d bytes\n",
152 if ( lber_debug > 1 && rc > 0 )
153 lber_bprint( sb->sb_ber.ber_buf, rc );
155 #endif /* LDAP_DEBUG */
160 rc = read( sb->sb_sd, sb->sb_ber.ber_buf,
161 ((sb->sb_options & LBER_NO_READ_AHEAD) &&
162 (len < READBUFSIZ)) ?
167 sb->sb_ber.ber_ptr = sb->sb_ber.ber_buf + 1;
168 sb->sb_ber.ber_end = sb->sb_ber.ber_buf + rc;
169 return( (unsigned char)*sb->sb_ber.ber_buf );
177 BerRead( Sockbuf *sb, char *buf, long len )
183 if ( (c = bergetc( sb, len )) < 0 ) {
198 ber_read( BerElement *ber, char *buf, unsigned long len )
200 unsigned long actuallen, nleft;
202 nleft = ber->ber_end - ber->ber_ptr;
203 actuallen = nleft < len ? nleft : len;
205 SAFEMEMCPY( buf, ber->ber_ptr, (size_t)actuallen );
207 ber->ber_ptr += actuallen;
209 return( (long)actuallen );
213 ber_write( BerElement *ber, char *buf, unsigned long len, int nosos )
215 if ( nosos || ber->ber_sos == NULL ) {
216 if ( ber->ber_ptr + len > ber->ber_end ) {
217 if ( ber_realloc( ber, len ) != 0 )
220 SAFEMEMCPY( ber->ber_ptr, buf, (size_t)len );
224 if ( ber->ber_sos->sos_ptr + len > ber->ber_end ) {
225 if ( ber_realloc( ber, len ) != 0 )
228 SAFEMEMCPY( ber->ber_sos->sos_ptr, buf, (size_t)len );
229 ber->ber_sos->sos_ptr += len;
230 ber->ber_sos->sos_clen += len;
236 ber_realloc( BerElement *ber, unsigned long len )
238 unsigned long need, have, total;
243 have = (ber->ber_end - ber->ber_buf) / EXBUFSIZ;
244 need = (len < EXBUFSIZ ? 1 : (len + (EXBUFSIZ - 1)) / EXBUFSIZ);
245 total = have * EXBUFSIZ + need * EXBUFSIZ;
247 oldbuf = ber->ber_buf;
249 if ( ber->ber_buf == NULL ) {
250 if ( (ber->ber_buf = (char *) malloc( (size_t)total )) == NULL )
252 } else if ( (ber->ber_buf = (char *) realloc( ber->ber_buf,
253 (size_t)total )) == NULL )
256 ber->ber_end = ber->ber_buf + total;
259 * If the stinking thing was moved, we need to go through and
260 * reset all the sos and ber pointers. Offsets would've been
261 * a better idea... oh well.
264 if ( ber->ber_buf != oldbuf ) {
265 ber->ber_ptr = ber->ber_buf + (ber->ber_ptr - oldbuf);
267 for ( s = ber->ber_sos; s != NULLSEQORSET; s = s->sos_next ) {
268 off = s->sos_first - oldbuf;
269 s->sos_first = ber->ber_buf + off;
271 off = s->sos_ptr - oldbuf;
272 s->sos_ptr = ber->ber_buf + off;
280 ber_free( BerElement *ber, int freebuf )
282 if ( freebuf && ber->ber_buf != NULL )
283 free( ber->ber_buf );
284 free( (char *) ber );
288 ber_flush( Sockbuf *sb, BerElement *ber, int freeit )
290 long nwritten, towrite, rc;
292 if ( ber->ber_rwptr == NULL ) {
293 ber->ber_rwptr = ber->ber_buf;
295 towrite = ber->ber_ptr - ber->ber_rwptr;
299 fprintf( stderr, "ber_flush: %ld bytes to sd %ld%s\n", towrite,
300 (long) sb->sb_sd, ber->ber_rwptr != ber->ber_buf ? " (re-flush)"
302 if ( lber_debug > 1 )
303 lber_bprint( ber->ber_rwptr, towrite );
306 #if !defined(MACOS) && !defined(DOS)
307 if ( sb->sb_options & (LBER_TO_FILE | LBER_TO_FILE_ONLY) ) {
308 rc = write( sb->sb_fd, ber->ber_buf, towrite );
309 if ( sb->sb_options & LBER_TO_FILE_ONLY ) {
317 if (sb->sb_naddr > 0) {
319 rc = udp_write( sb, ber->ber_buf + nwritten,
326 /* fake error if write was not atomic */
328 #if !defined( MACOS ) && !defined( DOS )
334 if ( (rc = BerWrite( sb, ber->ber_rwptr,
335 (size_t) towrite )) <= 0 ) {
341 ber->ber_rwptr += rc;
342 } while ( towrite > 0 );
351 ber_alloc_t( int options )
355 if ( (ber = (BerElement *) calloc( 1, sizeof(BerElement) )) == NULLBER )
357 ber->ber_tag = LBER_DEFAULT;
358 ber->ber_options = options;
366 return( ber_alloc_t( 0 ) );
372 return( ber_alloc_t( LBER_USE_DER ) );
376 ber_dup( BerElement *ber )
380 if ( (new = ber_alloc()) == NULLBER )
390 ber_init( BerElement *ber, int options )
392 (void) memset( (char *)ber, '\0', sizeof( BerElement ));
393 ber->ber_tag = LBER_DEFAULT;
394 ber->ber_options = options;
399 ber_reset( BerElement *ber, int was_writing )
402 ber->ber_end = ber->ber_ptr;
403 ber->ber_ptr = ber->ber_buf;
405 ber->ber_ptr = ber->ber_end;
408 ber->ber_rwptr = NULL;
415 ber_dump( BerElement *ber, int inout )
417 fprintf( stderr, "ber_dump: buf 0x%lx, ptr 0x%lx, end 0x%lx\n",
420 (long) ber->ber_end );
422 fprintf( stderr, " current len %ld, contents:\n",
423 (long) (ber->ber_end - ber->ber_ptr) );
424 lber_bprint( ber->ber_ptr, ber->ber_end - ber->ber_ptr );
426 fprintf( stderr, " current len %ld, contents:\n",
427 (long) (ber->ber_ptr - ber->ber_buf) );
428 lber_bprint( ber->ber_buf, ber->ber_ptr - ber->ber_buf );
433 ber_sos_dump( Seqorset *sos )
435 fprintf( stderr, "*** sos dump ***\n" );
436 while ( sos != NULLSEQORSET ) {
437 fprintf( stderr, "ber_sos_dump: clen %ld first 0x%lx ptr 0x%lx\n",
438 (long) sos->sos_clen, (long) sos->sos_first, (long) sos->sos_ptr );
439 fprintf( stderr, " current len %ld contents:\n",
440 (long) (sos->sos_ptr - sos->sos_first) );
441 lber_bprint( sos->sos_first, sos->sos_ptr - sos->sos_first );
445 fprintf( stderr, "*** end dump ***\n" );
450 /* return the tag - LBER_DEFAULT returned means trouble */
452 get_tag( Sockbuf *sb )
459 if ( BerRead( sb, (char *) &xbyte, 1 ) != 1 )
460 return( LBER_DEFAULT );
462 if ( (xbyte & LBER_BIG_TAG_MASK) != LBER_BIG_TAG_MASK )
463 return( (unsigned long) xbyte );
465 tagp = (char *) &tag;
467 for ( i = 1; i < sizeof(long); i++ ) {
468 if ( BerRead( sb, (char *) &xbyte, 1 ) != 1 )
469 return( LBER_DEFAULT );
473 if ( ! (xbyte & LBER_MORE_TAG_MASK) )
478 if ( i == sizeof(long) )
479 return( LBER_DEFAULT );
481 /* want leading, not trailing 0's */
482 return( tag >> (sizeof(long) - i - 1) );
486 ber_get_next( Sockbuf *sb, unsigned long *len, BerElement *ber )
488 unsigned long tag = 0, netlen, toread;
495 fprintf( stderr, "ber_get_next\n" );
499 * Any ber element looks like this: tag length contents.
500 * Assuming everything's ok, we return the tag byte (we
501 * can assume a single byte), return the length in len,
502 * and the rest of the undecoded element in buf.
505 * 1) small tags (less than 128)
506 * 2) definite lengths
507 * 3) primitive encodings used whenever possible
511 * first time through - malloc the buffer, set up ptrs, and
512 * read the tag and the length and as much of the rest as we can
515 if ( ber->ber_rwptr == NULL ) {
517 * First, we read the tag.
520 if ( (tag = get_tag( sb )) == LBER_DEFAULT ) {
521 return( LBER_DEFAULT );
526 * Next, read the length. The first byte contains the length
527 * of the length. If bit 8 is set, the length is the long
528 * form, otherwise it's the short form. We don't allow a
529 * length that's greater than what we can hold in an unsigned
534 if ( BerRead( sb, (char *) &lc, 1 ) != 1 ) {
535 return( LBER_DEFAULT );
538 noctets = (lc & 0x7f);
539 if ( noctets > sizeof(unsigned long) )
540 return( LBER_DEFAULT );
541 diff = sizeof(unsigned long) - noctets;
542 if ( BerRead( sb, (char *) &netlen + diff, noctets ) !=
544 return( LBER_DEFAULT );
546 *len = LBER_NTOHL( netlen );
553 * Finally, malloc a buffer for the contents and read it in.
554 * It's this buffer that's passed to all the other ber decoding
558 #if defined( DOS ) && !defined( _WIN32 )
559 if ( *len > 65535 ) { /* DOS can't allocate > 64K */
560 return( LBER_DEFAULT );
562 #endif /* DOS && !_WIN32 */
564 if ( ( sb->sb_options & LBER_MAX_INCOMING_SIZE ) &&
565 *len > sb->sb_max_incoming ) {
566 return( LBER_DEFAULT );
569 if ( (ber->ber_buf = (char *) malloc( (size_t)*len )) == NULL ) {
570 return( LBER_DEFAULT );
572 ber->ber_ptr = ber->ber_buf;
573 ber->ber_end = ber->ber_buf + *len;
574 ber->ber_rwptr = ber->ber_buf;
577 toread = (unsigned long)ber->ber_end - (unsigned long)ber->ber_rwptr;
579 if ( (rc = BerRead( sb, ber->ber_rwptr, (long)toread )) <= 0 ) {
580 return( LBER_DEFAULT );
584 ber->ber_rwptr += rc;
585 } while ( toread > 0 );
589 fprintf( stderr, "ber_get_next: tag 0x%lx len %ld contents:\n",
591 if ( lber_debug > 1 )
597 ber->ber_rwptr = NULL;
598 return( ber->ber_tag );