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.
21 #include <ac/socket.h>
22 #include <ac/string.h>
23 #include <ac/unistd.h>
31 static int ber_realloc LDAP_P(( BerElement *ber, unsigned long len ));
32 static int ber_filbuf LDAP_P(( Sockbuf *sb, long len ));
33 static long BerRead LDAP_P(( Sockbuf *sb, char *buf, long len ));
35 static int BerWrite LDAP_P(( Sockbuf *sb, char *buf, long len ));
38 #define bergetc( sb, len ) ( sb->sb_ber.ber_end > sb->sb_ber.ber_ptr ? \
39 (unsigned char)*sb->sb_ber.ber_ptr++ : \
40 ber_filbuf( sb, len ))
44 * MacTCP/OpenTransport
46 #define read( s, b, l ) tcpread( s, 0, (unsigned char *)b, l, NULL )
47 #define MAX_WRITE 65535
48 #define BerWrite( sb, b, l ) tcpwrite( sb->sb_sd, (unsigned char *)(b), (l<MAX_WRITE)? l : MAX_WRITE )
55 #define read( s, b, l ) recv( s, b, l, 0 )
56 #define BerWrite( s, b, l ) send( s->sb_sd, b, (int) l, 0 )
60 * NCSA Telnet TCP/IP stack (under DOS)
62 #define read( s, b, l ) nread( s, b, l )
63 #define BerWrite( s, b, l ) netwrite( s->sb_sd, b, l )
67 * Windows Socket API (under DOS/Windows 3.x)
69 #define read( s, b, l ) recv( s, b, l, 0 )
70 #define BerWrite( s, b, l ) send( s->sb_sd, b, l, 0 )
75 * 32-bit Windows Socket API (under Windows NT or Windows 95)
77 #define read( s, b, l ) recv( s, b, l, 0 )
78 #define BerWrite( s, b, l ) send( s->sb_sd, b, l, 0 )
82 * VMS -- each write must be 64K or smaller
84 #define MAX_WRITE 65535
85 #define BerWrite( sb, b, l ) write( sb->sb_sd, b, (l<MAX_WRITE)? l : MAX_WRITE)
88 * everything else (Unix/BSD 4.3 socket API)
90 #define BerWrite( sb, b, l ) write( sb->sb_sd, b, l )
92 #define udp_read( sb, b, l, al ) recvfrom(sb->sb_sd, (char *)b, l, 0, \
93 (struct sockaddr *)sb->sb_fromaddr, \
94 (al = sizeof(struct sockaddr), &al))
95 #define udp_write( sb, b, l ) sendto(sb->sb_sd, (char *)(b), l, 0, \
96 (struct sockaddr *)sb->sb_useaddr, sizeof(struct sockaddr))
102 #define udp_read( sb, b, l, al ) CLDAP NOT SUPPORTED
103 #define udp_write( sb, b, l ) CLDAP NOT SUPPORTED
104 #endif /* udp_read */
106 #define EXBUFSIZ 1024
109 ber_filbuf( Sockbuf *sb, long len )
112 #ifdef LDAP_CONNECTIONLESS
114 #endif /* LDAP_CONNECTIONLESS */
116 if ( sb->sb_ber.ber_buf == NULL ) {
117 if ( (sb->sb_ber.ber_buf = (char *) malloc( READBUFSIZ )) ==
120 sb->sb_ber.ber_ptr = sb->sb_ber.ber_buf;
121 sb->sb_ber.ber_end = sb->sb_ber.ber_buf;
124 if ( sb->sb_naddr > 0 ) {
125 #ifdef LDAP_CONNECTIONLESS
126 rc = udp_read(sb, sb->sb_ber.ber_buf, READBUFSIZ, addrlen );
128 if ( sb->sb_debug ) {
129 lber_log_printf( LDAP_DEBUG_ANY, sb->sb_debug,
130 "ber_filbuf udp_read %d bytes\n",
133 lber_log_bprint( LDAP_DEBUG_PACKETS, sb->sb_debug,
134 sb->sb_ber.ber_buf, rc );
136 #else /* LDAP_CONNECTIONLESS */
138 #endif /* LDAP_CONNECTIONLESS */
140 rc = read( sb->sb_sd, sb->sb_ber.ber_buf,
141 ((sb->sb_options & LBER_NO_READ_AHEAD) && (len < READBUFSIZ)) ?
146 sb->sb_ber.ber_ptr = sb->sb_ber.ber_buf + 1;
147 sb->sb_ber.ber_end = sb->sb_ber.ber_buf + rc;
148 return( (unsigned char)*sb->sb_ber.ber_buf );
156 BerRead( Sockbuf *sb, char *buf, long len )
162 if ( (c = bergetc( sb, len )) < 0 ) {
177 ber_read( BerElement *ber, char *buf, unsigned long len )
179 unsigned long actuallen, nleft;
181 nleft = ber->ber_end - ber->ber_ptr;
182 actuallen = nleft < len ? nleft : len;
184 SAFEMEMCPY( buf, ber->ber_ptr, (size_t)actuallen );
186 ber->ber_ptr += actuallen;
188 return( (long)actuallen );
192 ber_write( BerElement *ber, char *buf, unsigned long len, int nosos )
194 if ( nosos || ber->ber_sos == NULL ) {
195 if ( ber->ber_ptr + len > ber->ber_end ) {
196 if ( ber_realloc( ber, len ) != 0 )
199 SAFEMEMCPY( ber->ber_ptr, buf, (size_t)len );
203 if ( ber->ber_sos->sos_ptr + len > ber->ber_end ) {
204 if ( ber_realloc( ber, len ) != 0 )
207 SAFEMEMCPY( ber->ber_sos->sos_ptr, buf, (size_t)len );
208 ber->ber_sos->sos_ptr += len;
209 ber->ber_sos->sos_clen += len;
215 ber_realloc( BerElement *ber, unsigned long len )
217 unsigned long need, have, total;
222 have = (ber->ber_end - ber->ber_buf) / EXBUFSIZ;
223 need = (len < EXBUFSIZ ? 1 : (len + (EXBUFSIZ - 1)) / EXBUFSIZ);
224 total = have * EXBUFSIZ + need * EXBUFSIZ;
226 oldbuf = ber->ber_buf;
228 if ( ber->ber_buf == NULL ) {
229 if ( (ber->ber_buf = (char *) malloc( (size_t)total )) == NULL )
231 } else if ( (ber->ber_buf = (char *) realloc( ber->ber_buf,
232 (size_t)total )) == NULL )
235 ber->ber_end = ber->ber_buf + total;
238 * If the stinking thing was moved, we need to go through and
239 * reset all the sos and ber pointers. Offsets would've been
240 * a better idea... oh well.
243 if ( ber->ber_buf != oldbuf ) {
244 ber->ber_ptr = ber->ber_buf + (ber->ber_ptr - oldbuf);
246 for ( s = ber->ber_sos; s != NULLSEQORSET; s = s->sos_next ) {
247 off = s->sos_first - oldbuf;
248 s->sos_first = ber->ber_buf + off;
250 off = s->sos_ptr - oldbuf;
251 s->sos_ptr = ber->ber_buf + off;
259 ber_free( BerElement *ber, int freebuf )
261 if ( freebuf && ber->ber_buf != NULL )
262 free( ber->ber_buf );
263 free( (char *) ber );
267 ber_flush( Sockbuf *sb, BerElement *ber, int freeit )
269 long nwritten, towrite, rc;
271 if ( ber->ber_rwptr == NULL ) {
272 ber->ber_rwptr = ber->ber_buf;
274 towrite = ber->ber_ptr - ber->ber_rwptr;
276 if ( sb->sb_debug ) {
277 lber_log_printf( LDAP_DEBUG_ANY, sb->sb_debug,
278 "ber_flush: %ld bytes to sd %ld%s\n", towrite,
279 (long) sb->sb_sd, ber->ber_rwptr != ber->ber_buf ? " (re-flush)"
281 lber_log_bprint( LDAP_DEBUG_PACKETS, sb->sb_debug,
282 ber->ber_rwptr, towrite );
285 #if !defined(MACOS) && !defined(DOS)
286 if ( sb->sb_options & (LBER_TO_FILE | LBER_TO_FILE_ONLY) ) {
287 rc = write( sb->sb_fd, ber->ber_buf, towrite );
288 if ( sb->sb_options & LBER_TO_FILE_ONLY ) {
296 if (sb->sb_naddr > 0) {
297 #ifdef LDAP_CONNECTIONLESS
298 rc = udp_write( sb, ber->ber_buf + nwritten,
300 #else /* LDAP_CONNECTIONLESS */
302 #endif /* LDAP_CONNECTIONLESS */
306 /* fake error if write was not atomic */
314 if ( (rc = BerWrite( sb, ber->ber_rwptr,
315 (size_t) towrite )) <= 0 ) {
321 ber->ber_rwptr += rc;
322 } while ( towrite > 0 );
331 ber_alloc_t( int options )
335 if ( (ber = (BerElement *) calloc( 1, sizeof(BerElement) )) == NULLBER )
337 ber->ber_tag = LBER_DEFAULT;
338 ber->ber_options = options;
339 ber->ber_debug = lber_int_debug;
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 )
370 /* OLD U-Mich ber_init() */
372 ber_init_w_nullc( BerElement *ber, int options )
374 (void) memset( (char *)ber, '\0', sizeof( BerElement ));
375 ber->ber_tag = LBER_DEFAULT;
376 ber->ber_options = (char) options;
379 /* New C-API ber_init() */
380 /* This function constructs a BerElement containing a copy
381 ** of the data in the bv argument.
384 ber_init( struct berval *bv )
392 ber = ber_alloc_t( 0 );
394 if( ber == NULLBER ) {
395 /* allocation failed */
400 if ( (ber_write ( ber, bv->bv_val, bv->bv_len, 0 )) != bv->bv_len ) {
401 /* write failed, so free and return NULL */
406 ber_reset( ber, 1 ); /* reset the pointer to the start of the buffer */
411 /* New C-API ber_flatten routine */
412 /* This routine allocates a struct berval whose contents are a BER
413 ** encoding taken from the ber argument. The bvPtr pointer pointers to
414 ** the returned berval.
418 struct berval **bvPtr)
426 if ( (bv = malloc( sizeof(struct berval))) == NULL ) {
431 /* ber is null, create an empty berval */
436 /* copy the berval */
437 ptrdiff_t len = ber->ber_ptr - ber->ber_buf;
439 if ( (bv->bv_val = (char *) malloc( len + 1 )) == NULL ) {
444 SAFEMEMCPY( bv->bv_val, ber->ber_buf, (size_t)len );
445 bv->bv_val[len] = '\0';
454 ber_reset( BerElement *ber, int was_writing )
457 ber->ber_end = ber->ber_ptr;
458 ber->ber_ptr = ber->ber_buf;
460 ber->ber_ptr = ber->ber_end;
463 ber->ber_rwptr = NULL;
466 /* return the tag - LBER_DEFAULT returned means trouble */
468 get_tag( Sockbuf *sb )
475 if ( BerRead( sb, (char *) &xbyte, 1 ) != 1 )
476 return( LBER_DEFAULT );
478 if ( (xbyte & LBER_BIG_TAG_MASK) != LBER_BIG_TAG_MASK )
479 return( (unsigned long) xbyte );
481 tagp = (char *) &tag;
483 for ( i = 1; i < sizeof(long); i++ ) {
484 if ( BerRead( sb, (char *) &xbyte, 1 ) != 1 )
485 return( LBER_DEFAULT );
489 if ( ! (xbyte & LBER_MORE_TAG_MASK) )
494 if ( i == sizeof(long) )
495 return( LBER_DEFAULT );
497 /* want leading, not trailing 0's */
498 return( tag >> (sizeof(long) - i - 1) );
502 ber_get_next( Sockbuf *sb, unsigned long *len, BerElement *ber )
504 unsigned long tag = 0, netlen, toread;
510 if ( ber->ber_debug ) {
511 lber_log_printf( LDAP_DEBUG_TRACE, ber->ber_debug,
516 * Any ber element looks like this: tag length contents.
517 * Assuming everything's ok, we return the tag byte (we
518 * can assume a single byte), return the length in len,
519 * and the rest of the undecoded element in buf.
522 * 1) small tags (less than 128)
523 * 2) definite lengths
524 * 3) primitive encodings used whenever possible
528 * first time through - malloc the buffer, set up ptrs, and
529 * read the tag and the length and as much of the rest as we can
532 if ( ber->ber_rwptr == NULL ) {
534 * First, we read the tag.
537 if ( (tag = get_tag( sb )) == LBER_DEFAULT ) {
538 return( LBER_DEFAULT );
543 * Next, read the length. The first byte contains the length
544 * of the length. If bit 8 is set, the length is the long
545 * form, otherwise it's the short form. We don't allow a
546 * length that's greater than what we can hold in an unsigned
551 if ( BerRead( sb, (char *) &lc, 1 ) != 1 ) {
552 return( LBER_DEFAULT );
555 noctets = (lc & 0x7f);
556 if ( noctets > sizeof(unsigned long) )
557 return( LBER_DEFAULT );
558 diff = sizeof(unsigned long) - noctets;
559 if ( BerRead( sb, (char *) &netlen + diff, noctets ) !=
561 return( LBER_DEFAULT );
563 *len = AC_NTOHL( netlen );
570 * Finally, malloc a buffer for the contents and read it in.
571 * It's this buffer that's passed to all the other ber decoding
575 #if defined( DOS ) && !defined( _WIN32 )
576 if ( *len > 65535 ) { /* DOS can't allocate > 64K */
577 return( LBER_DEFAULT );
579 #endif /* DOS && !_WIN32 */
581 if ( ( sb->sb_options & LBER_MAX_INCOMING_SIZE ) &&
582 *len > (unsigned long) sb->sb_max_incoming ) {
583 return( LBER_DEFAULT );
586 if ( (ber->ber_buf = (char *) malloc( (size_t)*len )) == NULL ) {
587 return( LBER_DEFAULT );
589 ber->ber_ptr = ber->ber_buf;
590 ber->ber_end = ber->ber_buf + *len;
591 ber->ber_rwptr = ber->ber_buf;
594 toread = (unsigned long)ber->ber_end - (unsigned long)ber->ber_rwptr;
596 if ( (rc = BerRead( sb, ber->ber_rwptr, (long)toread )) <= 0 ) {
597 return( LBER_DEFAULT );
601 ber->ber_rwptr += rc;
602 } while ( toread > 0 );
604 if ( ber->ber_debug ) {
605 lber_log_printf( LDAP_DEBUG_TRACE, ber->ber_debug,
606 "ber_get_next: tag 0x%lx len %ld contents:\n",
609 lber_log_dump( LDAP_DEBUG_BER, ber->ber_debug, ber, 1 );
613 ber->ber_rwptr = NULL;
614 return( ber->ber_tag );
617 Sockbuf *lber_sockbuf_alloc( void )
619 Sockbuf *sb = calloc(1, sizeof(Sockbuf));
620 sb->sb_debug = lber_int_debug;
624 Sockbuf *lber_sockbuf_alloc_fd( int fd )
626 Sockbuf *sb = lber_sockbuf_alloc();
632 void lber_sockbuf_free( Sockbuf *sb )
634 if(sb == NULL) return;
639 int lber_sockbuf_get_option( Sockbuf *sb, int opt, void *outvalue )
641 return LBER_OPT_ERROR;
644 int lber_sockbuf_set_option( Sockbuf *sb, int opt, void *invalue )
646 return LBER_OPT_ERROR;