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 #include <ac/string.h>
21 #include <ac/unistd.h>
24 #include <sys/types.h>
25 #include <ac/socket.h>
33 static int ber_realloc LDAP_P(( BerElement *ber, unsigned long len ));
34 static int ber_filbuf LDAP_P(( Sockbuf *sb, long len ));
35 static long BerRead LDAP_P(( Sockbuf *sb, char *buf, long len ));
37 static int BerWrite LDAP_P(( Sockbuf *sb, char *buf, long len ));
40 #define bergetc( sb, len ) ( sb->sb_ber.ber_end > sb->sb_ber.ber_ptr ? \
41 (unsigned char)*sb->sb_ber.ber_ptr++ : \
42 ber_filbuf( sb, len ))
46 * MacTCP/OpenTransport
48 #define read( s, b, l ) tcpread( s, 0, (unsigned char *)b, l, NULL )
49 #define MAX_WRITE 65535
50 #define BerWrite( sb, b, l ) tcpwrite( sb->sb_sd, (unsigned char *)(b), (l<MAX_WRITE)? l : MAX_WRITE )
57 #define read( s, b, l ) recv( s, b, l, 0 )
58 #define BerWrite( s, b, l ) send( s->sb_sd, b, (int) l, 0 )
62 * NCSA Telnet TCP/IP stack (under DOS)
64 #define read( s, b, l ) nread( s, b, l )
65 #define BerWrite( s, b, l ) netwrite( s->sb_sd, b, l )
69 * Windows Socket API (under DOS/Windows 3.x)
71 #define read( s, b, l ) recv( s, b, l, 0 )
72 #define BerWrite( s, b, l ) send( s->sb_sd, b, l, 0 )
77 * 32-bit Windows Socket API (under Windows NT or Windows 95)
79 #define read( s, b, l ) recv( s, b, l, 0 )
80 #define BerWrite( s, b, l ) send( s->sb_sd, b, l, 0 )
84 * VMS -- each write must be 64K or smaller
86 #define MAX_WRITE 65535
87 #define BerWrite( sb, b, l ) write( sb->sb_sd, b, (l<MAX_WRITE)? l : MAX_WRITE)
90 * everything else (Unix/BSD 4.3 socket API)
92 #define BerWrite( sb, b, l ) write( sb->sb_sd, b, l )
94 #define udp_read( sb, b, l, al ) recvfrom(sb->sb_sd, (char *)b, l, 0, \
95 (struct sockaddr *)sb->sb_fromaddr, \
96 (al = sizeof(struct sockaddr), &al))
97 #define udp_write( sb, b, l ) sendto(sb->sb_sd, (char *)(b), l, 0, \
98 (struct sockaddr *)sb->sb_useaddr, sizeof(struct sockaddr))
104 #define udp_read( sb, b, l, al ) CLDAP NOT SUPPORTED
105 #define udp_write( sb, b, l ) CLDAP NOT SUPPORTED
106 #endif /* udp_read */
108 #define EXBUFSIZ 1024
111 ber_filbuf( Sockbuf *sb, long len )
118 if ( sb->sb_ber.ber_buf == NULL ) {
119 if ( (sb->sb_ber.ber_buf = (char *) malloc( READBUFSIZ )) ==
122 sb->sb_ber.ber_ptr = sb->sb_ber.ber_buf;
123 sb->sb_ber.ber_end = sb->sb_ber.ber_buf;
126 if ( sb->sb_naddr > 0 ) {
128 rc = udp_read(sb, sb->sb_ber.ber_buf, READBUFSIZ, addrlen );
131 fprintf( stderr, "ber_filbuf udp_read %d bytes\n",
133 if ( lber_debug > 1 && rc > 0 )
134 lber_bprint( sb->sb_ber.ber_buf, rc );
136 #endif /* LDAP_DEBUG */
141 rc = read( sb->sb_sd, sb->sb_ber.ber_buf,
142 ((sb->sb_options & LBER_NO_READ_AHEAD) &&
143 (len < READBUFSIZ)) ?
148 sb->sb_ber.ber_ptr = sb->sb_ber.ber_buf + 1;
149 sb->sb_ber.ber_end = sb->sb_ber.ber_buf + rc;
150 return( (unsigned char)*sb->sb_ber.ber_buf );
158 BerRead( Sockbuf *sb, char *buf, long len )
164 if ( (c = bergetc( sb, len )) < 0 ) {
179 ber_read( BerElement *ber, char *buf, unsigned long len )
181 unsigned long actuallen, nleft;
183 nleft = ber->ber_end - ber->ber_ptr;
184 actuallen = nleft < len ? nleft : len;
186 SAFEMEMCPY( buf, ber->ber_ptr, (size_t)actuallen );
188 ber->ber_ptr += actuallen;
190 return( (long)actuallen );
194 ber_write( BerElement *ber, char *buf, unsigned long len, int nosos )
196 if ( nosos || ber->ber_sos == NULL ) {
197 if ( ber->ber_ptr + len > ber->ber_end ) {
198 if ( ber_realloc( ber, len ) != 0 )
201 SAFEMEMCPY( ber->ber_ptr, buf, (size_t)len );
205 if ( ber->ber_sos->sos_ptr + len > ber->ber_end ) {
206 if ( ber_realloc( ber, len ) != 0 )
209 SAFEMEMCPY( ber->ber_sos->sos_ptr, buf, (size_t)len );
210 ber->ber_sos->sos_ptr += len;
211 ber->ber_sos->sos_clen += len;
217 ber_realloc( BerElement *ber, unsigned long len )
219 unsigned long need, have, total;
224 have = (ber->ber_end - ber->ber_buf) / EXBUFSIZ;
225 need = (len < EXBUFSIZ ? 1 : (len + (EXBUFSIZ - 1)) / EXBUFSIZ);
226 total = have * EXBUFSIZ + need * EXBUFSIZ;
228 oldbuf = ber->ber_buf;
230 if ( ber->ber_buf == NULL ) {
231 if ( (ber->ber_buf = (char *) malloc( (size_t)total )) == NULL )
233 } else if ( (ber->ber_buf = (char *) realloc( ber->ber_buf,
234 (size_t)total )) == NULL )
237 ber->ber_end = ber->ber_buf + total;
240 * If the stinking thing was moved, we need to go through and
241 * reset all the sos and ber pointers. Offsets would've been
242 * a better idea... oh well.
245 if ( ber->ber_buf != oldbuf ) {
246 ber->ber_ptr = ber->ber_buf + (ber->ber_ptr - oldbuf);
248 for ( s = ber->ber_sos; s != NULLSEQORSET; s = s->sos_next ) {
249 off = s->sos_first - oldbuf;
250 s->sos_first = ber->ber_buf + off;
252 off = s->sos_ptr - oldbuf;
253 s->sos_ptr = ber->ber_buf + off;
261 ber_free( BerElement *ber, int freebuf )
263 if ( freebuf && ber->ber_buf != NULL )
264 free( ber->ber_buf );
265 free( (char *) ber );
269 ber_flush( Sockbuf *sb, BerElement *ber, int freeit )
271 long nwritten, towrite, rc;
273 if ( ber->ber_rwptr == NULL ) {
274 ber->ber_rwptr = ber->ber_buf;
276 towrite = ber->ber_ptr - ber->ber_rwptr;
280 fprintf( stderr, "ber_flush: %ld bytes to sd %ld%s\n", towrite,
281 (long) sb->sb_sd, ber->ber_rwptr != ber->ber_buf ? " (re-flush)"
283 if ( lber_debug > 1 )
284 lber_bprint( ber->ber_rwptr, towrite );
287 #if !defined(MACOS) && !defined(DOS)
288 if ( sb->sb_options & (LBER_TO_FILE | LBER_TO_FILE_ONLY) ) {
289 rc = write( sb->sb_fd, ber->ber_buf, towrite );
290 if ( sb->sb_options & LBER_TO_FILE_ONLY ) {
298 if (sb->sb_naddr > 0) {
300 rc = udp_write( sb, ber->ber_buf + nwritten,
307 /* fake error if write was not atomic */
309 #if defined( WSAEMSGSIZE )
315 if ( (rc = BerWrite( sb, ber->ber_rwptr,
316 (size_t) towrite )) <= 0 ) {
322 ber->ber_rwptr += rc;
323 } while ( towrite > 0 );
332 ber_alloc_t( int options )
336 if ( (ber = (BerElement *) calloc( 1, sizeof(BerElement) )) == NULLBER )
338 ber->ber_tag = LBER_DEFAULT;
339 ber->ber_options = options;
347 return( ber_alloc_t( 0 ) );
353 return( ber_alloc_t( LBER_USE_DER ) );
357 ber_dup( BerElement *ber )
361 if ( (new = ber_alloc()) == NULLBER )
371 ber_init( BerElement *ber, int options )
373 (void) memset( (char *)ber, '\0', sizeof( BerElement ));
374 ber->ber_tag = LBER_DEFAULT;
375 ber->ber_options = options;
380 ber_reset( BerElement *ber, int was_writing )
383 ber->ber_end = ber->ber_ptr;
384 ber->ber_ptr = ber->ber_buf;
386 ber->ber_ptr = ber->ber_end;
389 ber->ber_rwptr = NULL;
396 ber_dump( BerElement *ber, int inout )
398 fprintf( stderr, "ber_dump: buf 0x%lx, ptr 0x%lx, end 0x%lx\n",
401 (long) ber->ber_end );
403 fprintf( stderr, " current len %ld, contents:\n",
404 (long) (ber->ber_end - ber->ber_ptr) );
405 lber_bprint( ber->ber_ptr, ber->ber_end - ber->ber_ptr );
407 fprintf( stderr, " current len %ld, contents:\n",
408 (long) (ber->ber_ptr - ber->ber_buf) );
409 lber_bprint( ber->ber_buf, ber->ber_ptr - ber->ber_buf );
414 ber_sos_dump( Seqorset *sos )
416 fprintf( stderr, "*** sos dump ***\n" );
417 while ( sos != NULLSEQORSET ) {
418 fprintf( stderr, "ber_sos_dump: clen %ld first 0x%lx ptr 0x%lx\n",
419 (long) sos->sos_clen, (long) sos->sos_first, (long) sos->sos_ptr );
420 fprintf( stderr, " current len %ld contents:\n",
421 (long) (sos->sos_ptr - sos->sos_first) );
422 lber_bprint( sos->sos_first, sos->sos_ptr - sos->sos_first );
426 fprintf( stderr, "*** end dump ***\n" );
431 /* return the tag - LBER_DEFAULT returned means trouble */
433 get_tag( Sockbuf *sb )
440 if ( BerRead( sb, (char *) &xbyte, 1 ) != 1 )
441 return( LBER_DEFAULT );
443 if ( (xbyte & LBER_BIG_TAG_MASK) != LBER_BIG_TAG_MASK )
444 return( (unsigned long) xbyte );
446 tagp = (char *) &tag;
448 for ( i = 1; i < sizeof(long); i++ ) {
449 if ( BerRead( sb, (char *) &xbyte, 1 ) != 1 )
450 return( LBER_DEFAULT );
454 if ( ! (xbyte & LBER_MORE_TAG_MASK) )
459 if ( i == sizeof(long) )
460 return( LBER_DEFAULT );
462 /* want leading, not trailing 0's */
463 return( tag >> (sizeof(long) - i - 1) );
467 ber_get_next( Sockbuf *sb, unsigned long *len, BerElement *ber )
469 unsigned long tag = 0, netlen, toread;
476 fprintf( stderr, "ber_get_next\n" );
480 * Any ber element looks like this: tag length contents.
481 * Assuming everything's ok, we return the tag byte (we
482 * can assume a single byte), return the length in len,
483 * and the rest of the undecoded element in buf.
486 * 1) small tags (less than 128)
487 * 2) definite lengths
488 * 3) primitive encodings used whenever possible
492 * first time through - malloc the buffer, set up ptrs, and
493 * read the tag and the length and as much of the rest as we can
496 if ( ber->ber_rwptr == NULL ) {
498 * First, we read the tag.
501 if ( (tag = get_tag( sb )) == LBER_DEFAULT ) {
502 return( LBER_DEFAULT );
507 * Next, read the length. The first byte contains the length
508 * of the length. If bit 8 is set, the length is the long
509 * form, otherwise it's the short form. We don't allow a
510 * length that's greater than what we can hold in an unsigned
515 if ( BerRead( sb, (char *) &lc, 1 ) != 1 ) {
516 return( LBER_DEFAULT );
519 noctets = (lc & 0x7f);
520 if ( noctets > sizeof(unsigned long) )
521 return( LBER_DEFAULT );
522 diff = sizeof(unsigned long) - noctets;
523 if ( BerRead( sb, (char *) &netlen + diff, noctets ) !=
525 return( LBER_DEFAULT );
527 *len = AC_NTOHL( netlen );
534 * Finally, malloc a buffer for the contents and read it in.
535 * It's this buffer that's passed to all the other ber decoding
539 #if defined( DOS ) && !defined( _WIN32 )
540 if ( *len > 65535 ) { /* DOS can't allocate > 64K */
541 return( LBER_DEFAULT );
543 #endif /* DOS && !_WIN32 */
545 if ( ( sb->sb_options & LBER_MAX_INCOMING_SIZE ) &&
546 *len > (unsigned long) sb->sb_max_incoming ) {
547 return( LBER_DEFAULT );
550 if ( (ber->ber_buf = (char *) malloc( (size_t)*len )) == NULL ) {
551 return( LBER_DEFAULT );
553 ber->ber_ptr = ber->ber_buf;
554 ber->ber_end = ber->ber_buf + *len;
555 ber->ber_rwptr = ber->ber_buf;
558 toread = (unsigned long)ber->ber_end - (unsigned long)ber->ber_rwptr;
560 if ( (rc = BerRead( sb, ber->ber_rwptr, (long)toread )) <= 0 ) {
561 return( LBER_DEFAULT );
565 ber->ber_rwptr += rc;
566 } while ( toread > 0 );
570 fprintf( stderr, "ber_get_next: tag 0x%lx len %ld contents:\n",
572 if ( lber_debug > 1 )
578 ber->ber_rwptr = NULL;
579 return( ber->ber_tag );