1 /* io.c - ber general i/o routines */
4 * Copyright 1998-2000 The OpenLDAP Foundation, All Rights Reserved.
5 * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
8 * Copyright (c) 1990 Regents of the University of Michigan.
11 * Redistribution and use in source and binary forms are permitted
12 * provided that this notice is preserved and that due credit is given
13 * to the University of Michigan at Ann Arbor. The name of the University
14 * may not be used to endorse or promote products derived from this
15 * software without specific prior written permission. This software
16 * is provided ``as is'' without express or implied warranty.
23 #include <ac/stdlib.h>
27 #include <ac/socket.h>
28 #include <ac/string.h>
29 #include <ac/unistd.h>
47 assert( buf != NULL );
49 assert( SOCKBUF_VALID( sb ) );
52 if ( (c = ber_int_sb_read( sb, buf, len )) <= 0 ) {
71 ber_len_t actuallen, nleft;
73 assert( ber != NULL );
74 assert( buf != NULL );
76 assert( LBER_VALID( ber ) );
78 nleft = ber_pvt_ber_remaining( ber );
79 actuallen = nleft < len ? nleft : len;
81 AC_MEMCPY( buf, ber->ber_ptr, actuallen );
83 ber->ber_ptr += actuallen;
85 return( (ber_slen_t) actuallen );
95 assert( ber != NULL );
96 assert( buf != NULL );
98 assert( LBER_VALID( ber ) );
100 if ( nosos || ber->ber_sos == NULL ) {
101 if ( ber->ber_ptr + len > ber->ber_end ) {
102 if ( ber_realloc( ber, len ) != 0 )
105 AC_MEMCPY( ber->ber_ptr, buf, (size_t)len );
107 return( (ber_slen_t) len );
110 if ( ber->ber_sos->sos_ptr + len > ber->ber_end ) {
111 if ( ber_realloc( ber, len ) != 0 )
114 AC_MEMCPY( ber->ber_sos->sos_ptr, buf, (size_t)len );
115 ber->ber_sos->sos_ptr += len;
116 ber->ber_sos->sos_clen += len;
117 return( (ber_slen_t) len );
122 ber_realloc( BerElement *ber, ber_len_t len )
129 assert( ber != NULL );
131 assert( LBER_VALID( ber ) );
133 total = ber_pvt_ber_total( ber );
135 #define LBER_EXBUFSIZ 1000 /* a few words less than 2^N for binary buddy */
136 #if defined( LBER_EXBUFSIZ ) && LBER_EXBUFSIZ > 0
138 /* don't realloc by small amounts */
139 total += len < LBER_EXBUFSIZ ? LBER_EXBUFSIZ : len;
141 { /* not sure what value this adds */
142 ber_len_t have = (total + (LBER_EXBUFSIZE - 1)) / LBER_EXBUFSIZ;
143 ber_len_t need = (len + (LBER_EXBUFSIZ - 1)) / LBER_EXBUFSIZ;
144 total = ( have + need ) * LBER_EXBUFSIZ;
148 total += len; /* realloc just what's needed */
151 oldbuf = ber->ber_buf;
153 ber->ber_buf = (char *) LBER_REALLOC( oldbuf, total );
155 if ( ber->ber_buf == NULL ) {
156 ber->ber_buf = oldbuf;
160 ber->ber_end = ber->ber_buf + total;
163 * If the stinking thing was moved, we need to go through and
164 * reset all the sos and ber pointers. Offsets would've been
165 * a better idea... oh well.
168 if ( ber->ber_buf != oldbuf ) {
169 ber->ber_ptr = ber->ber_buf + (ber->ber_ptr - oldbuf);
171 for ( s = ber->ber_sos; s != NULL; s = s->sos_next ) {
172 off = s->sos_first - oldbuf;
173 s->sos_first = ber->ber_buf + off;
175 off = s->sos_ptr - oldbuf;
176 s->sos_ptr = ber->ber_buf + off;
184 ber_free( BerElement *ber, int freebuf )
186 #ifdef LDAP_MEMORY_DEBUG
187 assert( ber != NULL );
194 assert( LBER_VALID( ber ) );
198 LBER_FREE( ber->ber_buf );
200 for( s = ber->ber_sos ; s != NULL ; s = next ) {
208 ber->ber_valid = LBER_UNINITIALIZED;
210 LBER_FREE( (char *) ber );
214 ber_flush( Sockbuf *sb, BerElement *ber, int freeit )
216 ber_len_t nwritten, towrite;
219 assert( sb != NULL );
220 assert( ber != NULL );
222 assert( SOCKBUF_VALID( sb ) );
223 assert( LBER_VALID( ber ) );
225 if ( ber->ber_rwptr == NULL ) {
226 ber->ber_rwptr = ber->ber_buf;
228 towrite = ber->ber_ptr - ber->ber_rwptr;
230 if ( sb->sb_debug ) {
232 LDAP_LOG(( "liblber", LDAP_LEVEL_DETAIL1,
233 "ber_flush: %ld bytes to sd %ld%s\n",
234 towrite, (long)sb->sb_fd,
235 ber->ber_rwptr != ber->ber_buf ? " (re-flush)" : "" ));
236 BER_DUMP(( "liblber", LDAP_LEVEL_DETAIL2, ber, 1 ));
238 ber_log_printf( LDAP_DEBUG_ANY, sb->sb_debug,
239 "ber_flush: %ld bytes to sd %ld%s\n",
240 towrite, (long) sb->sb_fd,
241 ber->ber_rwptr != ber->ber_buf ? " (re-flush)" : "" );
242 ber_log_bprint( LDAP_DEBUG_PACKETS, sb->sb_debug,
243 ber->ber_rwptr, towrite );
249 rc = ber_int_sb_write( sb, ber->ber_rwptr, towrite );
255 ber->ber_rwptr += rc;
256 } while ( towrite > 0 );
265 ber_alloc_t( int options )
269 ber_int_options.lbo_valid = LBER_INITIALIZED;
271 ber = (BerElement *) LBER_CALLOC( 1, sizeof(BerElement) );
277 ber->ber_valid = LBER_VALID_BERELEMENT;
278 ber->ber_tag = LBER_DEFAULT;
279 ber->ber_options = options;
280 ber->ber_debug = ber_int_debug;
282 assert( LBER_VALID( ber ) );
287 ber_alloc( void ) /* deprecated */
289 return ber_alloc_t( 0 );
293 der_alloc( void ) /* deprecated */
295 return ber_alloc_t( LBER_USE_DER );
299 ber_dup( BerElement *ber )
303 assert( ber != NULL );
304 assert( LBER_VALID( ber ) );
306 if ( (new = ber_alloc_t( ber->ber_options )) == NULL ) {
312 assert( LBER_VALID( new ) );
317 /* OLD U-Mich ber_init() */
319 ber_init_w_nullc( BerElement *ber, int options )
321 assert( ber != NULL );
323 ber_int_options.lbo_valid = LBER_INITIALIZED;
325 (void) memset( (char *)ber, '\0', sizeof( BerElement ));
326 ber->ber_valid = LBER_VALID_BERELEMENT;
327 ber->ber_tag = LBER_DEFAULT;
328 ber->ber_options = (char) options;
329 ber->ber_debug = ber_int_debug;
331 assert( LBER_VALID( ber ) );
334 /* New C-API ber_init() */
335 /* This function constructs a BerElement containing a copy
336 ** of the data in the bv argument.
339 ber_init( struct berval *bv )
343 assert( bv != NULL );
345 ber_int_options.lbo_valid = LBER_INITIALIZED;
351 ber = ber_alloc_t( 0 );
354 /* allocation failed */
359 if ( ((ber_len_t) ber_write ( ber, bv->bv_val, bv->bv_len, 0 ))
362 /* write failed, so free and return NULL */
367 ber_reset( ber, 1 ); /* reset the pointer to the start of the buffer */
371 /* New C-API ber_flatten routine */
372 /* This routine allocates a struct berval whose contents are a BER
373 ** encoding taken from the ber argument. The bvPtr pointer pointers to
374 ** the returned berval.
378 struct berval **bvPtr)
382 assert( bvPtr != NULL );
384 ber_int_options.lbo_valid = LBER_INITIALIZED;
390 bv = LBER_MALLOC( sizeof(struct berval) );
396 /* ber is null, create an empty berval */
401 /* copy the berval */
402 ber_len_t len = ber_pvt_ber_write( ber );
404 bv->bv_val = (char *) LBER_MALLOC( len + 1 );
405 if ( bv->bv_val == NULL ) {
410 AC_MEMCPY( bv->bv_val, ber->ber_buf, len );
411 bv->bv_val[len] = '\0';
420 ber_reset( BerElement *ber, int was_writing )
422 assert( ber != NULL );
423 assert( LBER_VALID( ber ) );
426 ber->ber_end = ber->ber_ptr;
427 ber->ber_ptr = ber->ber_buf;
430 ber->ber_ptr = ber->ber_end;
433 ber->ber_rwptr = NULL;
437 * A rewrite of ber_get_next that can safely be called multiple times
438 * for the same packet. It will simply continue where it stopped until
439 * a full packet is read.
448 assert( sb != NULL );
449 assert( len != NULL );
450 assert( ber != NULL );
452 assert( SOCKBUF_VALID( sb ) );
453 assert( LBER_VALID( ber ) );
456 LDAP_LOG(( "liblber", LDAP_LEVEL_ENTRY, "ber_get_next: enter\n" ));
458 ber_log_printf( LDAP_DEBUG_TRACE, ber->ber_debug,
463 * Any ber element looks like this: tag length contents.
464 * Assuming everything's ok, we return the tag byte (we
465 * can assume a single byte), return the length in len,
466 * and the rest of the undecoded element in buf.
469 * 1) small tags (less than 128)
470 * 2) definite lengths
471 * 3) primitive encodings used whenever possible
474 if (ber->ber_rwptr == NULL) {
476 * dtest does like this assert.
478 /* assert( ber->ber_buf == NULL ); */
479 ber->ber_rwptr = (char *) &ber->ber_tag;
484 #define PTR_IN_VAR( ptr, var ) \
485 (((ptr)>=(char *) &(var)) && ((ptr)< (char *) &(var)+sizeof(var)))
487 if (PTR_IN_VAR(ber->ber_rwptr, ber->ber_tag)) {
488 if (ber->ber_rwptr == (char *) &ber->ber_tag) {
489 if (ber_int_sb_read( sb, ber->ber_rwptr, 1)<=0)
492 if ((ber->ber_rwptr[0] & LBER_BIG_TAG_MASK)
493 != LBER_BIG_TAG_MASK)
495 ber->ber_tag = ber->ber_rwptr[0];
496 ber->ber_rwptr = (char *) &ber->ber_usertag;
502 /* reading the tag... */
503 if (ber_int_sb_read( sb, ber->ber_rwptr, 1)<=0) {
507 if (! (ber->ber_rwptr[0] & LBER_MORE_TAG_MASK) ) {
508 ber->ber_tag>>=sizeof(ber->ber_tag) -
509 ((char *) &ber->ber_tag - ber->ber_rwptr);
510 ber->ber_rwptr = (char *) &ber->ber_usertag;
513 } while( PTR_IN_VAR(ber->ber_rwptr, ber->ber_tag ));
515 errno = ERANGE; /* this is a serious error. */
520 if (ber->ber_rwptr==(char *) &ber->ber_usertag) {
522 if (ber_int_sb_read( sb, (char *) &c, 1)<=0) {
528 if ( (len==0) || ( len>sizeof( ber->ber_len ) ) ) {
533 ber->ber_rwptr = (char *) &ber->ber_len +
534 sizeof(ber->ber_len) - len;
543 if (PTR_IN_VAR(ber->ber_rwptr, ber->ber_len)) {
544 unsigned char netlen[sizeof(ber_len_t)];
548 to_go = (char *) &ber->ber_len + sizeof( ber->ber_len ) -
552 res = BerRead( sb, netlen, to_go );
556 ber->ber_rwptr += res;
558 /* convert length. */
559 for( to_go = 0; to_go < res ; to_go++ ) {
561 ber->ber_len |= netlen[to_go];
564 if (PTR_IN_VAR(ber->ber_rwptr, ber->ber_len)) {
570 /* now fill the buffer. */
572 /* make sure length is reasonable */
573 if ( ber->ber_len == 0 ||
574 ( sb->sb_max_incoming && ber->ber_len > sb->sb_max_incoming ))
580 if (ber->ber_buf==NULL) {
581 ber->ber_buf = (char *) LBER_MALLOC( ber->ber_len );
582 if (ber->ber_buf==NULL) {
585 ber->ber_rwptr = ber->ber_buf;
586 ber->ber_ptr = ber->ber_buf;
587 ber->ber_end = ber->ber_buf + ber->ber_len;
590 if ((ber->ber_rwptr>=ber->ber_buf) && (ber->ber_rwptr<ber->ber_end)) {
594 to_go = ber->ber_end - ber->ber_rwptr;
597 res = ber_int_sb_read( sb, ber->ber_rwptr, to_go );
603 #if defined( EWOULDBLOCK )
605 #elif defined( EAGAIN )
611 ber->ber_rwptr = NULL;
613 if ( ber->ber_debug ) {
615 LDAP_LOG(( "liblber", LDAP_LEVEL_DETAIL1,
616 "ber_get_next: tag 0x%lx len %ld\n",
617 ber->ber_tag, ber->ber_len ));
618 BER_DUMP(( "liblber", LDAP_LEVEL_DETAIL2, ber, 1 ));
620 ber_log_printf( LDAP_DEBUG_TRACE, ber->ber_debug,
621 "ber_get_next: tag 0x%lx len %ld contents:\n",
622 ber->ber_tag, ber->ber_len );
623 ber_log_dump( LDAP_DEBUG_BER, ber->ber_debug, ber, 1 );
626 return (ber->ber_tag);
629 assert( 0 ); /* ber structure is messed up ?*/