1 /* io.c - ber general i/o routines */
4 * Copyright 1998-2002 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_buf( BerElement *ber )
188 assert( LBER_VALID( ber ) );
190 if ( ber->ber_buf) LBER_FREE( ber->ber_buf );
192 for( s = ber->ber_sos ; s != NULL ; s = next ) {
199 ber->ber_valid = LBER_UNINITIALIZED;
203 ber_free( BerElement *ber, int freebuf )
205 #ifdef LDAP_MEMORY_DEBUG
206 assert( ber != NULL );
216 LBER_FREE( (char *) ber );
220 ber_flush( Sockbuf *sb, BerElement *ber, int freeit )
222 ber_len_t nwritten, towrite;
225 assert( sb != NULL );
226 assert( ber != NULL );
228 assert( SOCKBUF_VALID( sb ) );
229 assert( LBER_VALID( ber ) );
231 if ( ber->ber_rwptr == NULL ) {
232 ber->ber_rwptr = ber->ber_buf;
234 towrite = ber->ber_ptr - ber->ber_rwptr;
236 if ( sb->sb_debug ) {
238 LDAP_LOG(( "liblber", LDAP_LEVEL_DETAIL1,
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_DUMP(( "liblber", LDAP_LEVEL_DETAIL2, ber, 1 ));
244 ber_log_printf( LDAP_DEBUG_ANY, sb->sb_debug,
245 "ber_flush: %ld bytes to sd %ld%s\n",
246 towrite, (long) sb->sb_fd,
247 ber->ber_rwptr != ber->ber_buf ? " (re-flush)" : "" );
248 ber_log_bprint( LDAP_DEBUG_PACKETS, sb->sb_debug,
249 ber->ber_rwptr, towrite );
255 rc = ber_int_sb_write( sb, ber->ber_rwptr, towrite );
261 ber->ber_rwptr += rc;
262 } while ( towrite > 0 );
271 ber_alloc_t( int options )
275 ber_int_options.lbo_valid = LBER_INITIALIZED;
277 ber = (BerElement *) LBER_CALLOC( 1, sizeof(BerElement) );
283 ber->ber_valid = LBER_VALID_BERELEMENT;
284 ber->ber_tag = LBER_DEFAULT;
285 ber->ber_options = options;
286 ber->ber_debug = ber_int_debug;
288 assert( LBER_VALID( ber ) );
293 ber_alloc( void ) /* deprecated */
295 return ber_alloc_t( 0 );
299 der_alloc( void ) /* deprecated */
301 return ber_alloc_t( LBER_USE_DER );
305 ber_dup( BerElement *ber )
309 assert( ber != NULL );
310 assert( LBER_VALID( ber ) );
312 if ( (new = ber_alloc_t( ber->ber_options )) == NULL ) {
318 assert( LBER_VALID( new ) );
323 /* OLD U-Mich ber_init() */
325 ber_init_w_nullc( BerElement *ber, int options )
327 assert( ber != NULL );
329 ber_int_options.lbo_valid = LBER_INITIALIZED;
331 (void) memset( (char *)ber, '\0', sizeof( BerElement ));
332 ber->ber_valid = LBER_VALID_BERELEMENT;
333 ber->ber_tag = LBER_DEFAULT;
334 ber->ber_options = (char) options;
335 ber->ber_debug = ber_int_debug;
337 assert( LBER_VALID( ber ) );
340 /* New C-API ber_init() */
341 /* This function constructs a BerElement containing a copy
342 ** of the data in the bv argument.
345 ber_init( struct berval *bv )
349 assert( bv != NULL );
351 ber_int_options.lbo_valid = LBER_INITIALIZED;
357 ber = ber_alloc_t( 0 );
360 /* allocation failed */
365 if ( ((ber_len_t) ber_write ( ber, bv->bv_val, bv->bv_len, 0 ))
368 /* write failed, so free and return NULL */
373 ber_reset( ber, 1 ); /* reset the pointer to the start of the buffer */
377 /* New C-API ber_flatten routine */
378 /* This routine allocates a struct berval whose contents are a BER
379 ** encoding taken from the ber argument. The bvPtr pointer pointers to
380 ** the returned berval.
384 struct berval **bvPtr)
388 assert( bvPtr != NULL );
390 ber_int_options.lbo_valid = LBER_INITIALIZED;
396 bv = LBER_MALLOC( sizeof(struct berval) );
402 /* ber is null, create an empty berval */
407 /* copy the berval */
408 ber_len_t len = ber_pvt_ber_write( ber );
410 bv->bv_val = (char *) LBER_MALLOC( len + 1 );
411 if ( bv->bv_val == NULL ) {
416 AC_MEMCPY( bv->bv_val, ber->ber_buf, len );
417 bv->bv_val[len] = '\0';
426 ber_reset( BerElement *ber, int was_writing )
428 assert( ber != NULL );
429 assert( LBER_VALID( ber ) );
432 ber->ber_end = ber->ber_ptr;
433 ber->ber_ptr = ber->ber_buf;
436 ber->ber_ptr = ber->ber_end;
439 ber->ber_rwptr = NULL;
443 * A rewrite of ber_get_next that can safely be called multiple times
444 * for the same packet. It will simply continue where it stopped until
445 * a full packet is read.
454 assert( sb != NULL );
455 assert( len != NULL );
456 assert( ber != NULL );
458 assert( SOCKBUF_VALID( sb ) );
459 assert( LBER_VALID( ber ) );
462 LDAP_LOG(( "liblber", LDAP_LEVEL_ENTRY, "ber_get_next: enter\n" ));
464 ber_log_printf( LDAP_DEBUG_TRACE, ber->ber_debug,
469 * Any ber element looks like this: tag length contents.
470 * Assuming everything's ok, we return the tag byte (we
471 * can assume a single byte), return the length in len,
472 * and the rest of the undecoded element in buf.
475 * 1) small tags (less than 128)
476 * 2) definite lengths
477 * 3) primitive encodings used whenever possible
480 if (ber->ber_rwptr == NULL) {
482 * dtest does like this assert.
484 /* assert( ber->ber_buf == NULL ); */
485 ber->ber_rwptr = (char *) &ber->ber_tag;
490 #define PTR_IN_VAR( ptr, var ) \
491 (((ptr)>=(char *) &(var)) && ((ptr)< (char *) &(var)+sizeof(var)))
493 if (PTR_IN_VAR(ber->ber_rwptr, ber->ber_tag)) {
494 if (ber->ber_rwptr == (char *) &ber->ber_tag) {
495 if (ber_int_sb_read( sb, ber->ber_rwptr, 1)<=0)
498 if ((ber->ber_rwptr[0] & LBER_BIG_TAG_MASK)
499 != LBER_BIG_TAG_MASK)
501 ber->ber_tag = ber->ber_rwptr[0];
502 ber->ber_rwptr = (char *) &ber->ber_usertag;
508 /* reading the tag... */
509 if (ber_int_sb_read( sb, ber->ber_rwptr, 1)<=0) {
513 if (! (ber->ber_rwptr[0] & LBER_MORE_TAG_MASK) ) {
514 ber->ber_tag>>=sizeof(ber->ber_tag) -
515 ((char *) &ber->ber_tag - ber->ber_rwptr);
516 ber->ber_rwptr = (char *) &ber->ber_usertag;
519 } while( PTR_IN_VAR(ber->ber_rwptr, ber->ber_tag ));
521 errno = ERANGE; /* this is a serious error. */
526 if (ber->ber_rwptr==(char *) &ber->ber_usertag) {
528 if (ber_int_sb_read( sb, (char *) &c, 1)<=0) {
534 if ( (len==0) || ( len>sizeof( ber->ber_len ) ) ) {
539 ber->ber_rwptr = (char *) &ber->ber_len +
540 sizeof(ber->ber_len) - len;
549 if (PTR_IN_VAR(ber->ber_rwptr, ber->ber_len)) {
550 unsigned char netlen[sizeof(ber_len_t)];
554 to_go = (char *) &ber->ber_len + sizeof( ber->ber_len ) -
558 res = BerRead( sb, netlen, to_go );
562 ber->ber_rwptr += res;
564 /* convert length. */
565 for( to_go = 0; to_go < res ; to_go++ ) {
567 ber->ber_len |= netlen[to_go];
570 if (PTR_IN_VAR(ber->ber_rwptr, ber->ber_len)) {
576 /* now fill the buffer. */
578 /* make sure length is reasonable */
579 if ( ber->ber_len == 0 ) {
582 } else if ( sb->sb_max_incoming && ber->ber_len > sb->sb_max_incoming ) {
584 LDAP_LOG(( "liblber", LDAP_LEVEL_ERR,
585 "ber_get_next: sockbuf_max_incoming limit hit "
586 "(%d > %d)\n", ber->ber_len, sb->sb_max_incoming ));
588 ber_log_printf( LDAP_DEBUG_CONNS, ber->ber_debug,
589 "ber_get_next: sockbuf_max_incoming limit hit "
590 "(%ld > %ld)\n", ber->ber_len, sb->sb_max_incoming );
596 if (ber->ber_buf==NULL) {
597 ber->ber_buf = (char *) LBER_MALLOC( ber->ber_len );
598 if (ber->ber_buf==NULL) {
601 ber->ber_rwptr = ber->ber_buf;
602 ber->ber_ptr = ber->ber_buf;
603 ber->ber_end = ber->ber_buf + ber->ber_len;
606 if ((ber->ber_rwptr>=ber->ber_buf) && (ber->ber_rwptr<ber->ber_end)) {
610 to_go = ber->ber_end - ber->ber_rwptr;
613 res = ber_int_sb_read( sb, ber->ber_rwptr, to_go );
619 #if defined( EWOULDBLOCK )
621 #elif defined( EAGAIN )
627 ber->ber_rwptr = NULL;
629 if ( ber->ber_debug ) {
631 LDAP_LOG(( "liblber", LDAP_LEVEL_DETAIL1,
632 "ber_get_next: tag 0x%lx len %ld\n",
633 ber->ber_tag, ber->ber_len ));
634 BER_DUMP(( "liblber", LDAP_LEVEL_DETAIL2, ber, 1 ));
636 ber_log_printf( LDAP_DEBUG_TRACE, ber->ber_debug,
637 "ber_get_next: tag 0x%lx len %ld contents:\n",
638 ber->ber_tag, ber->ber_len );
639 ber_log_dump( LDAP_DEBUG_BER, ber->ber_debug, ber, 1 );
642 return (ber->ber_tag);
645 assert( 0 ); /* ber structure is messed up ?*/