X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=libraries%2Fliblber%2Fio.c;h=a62161495ab8fca8145953d6feca905341368279;hb=f2958fe7ef5185f879aab3fd057717733f9635b3;hp=c618d0b286591ff22f26743a9c3d0a61bbdca0af;hpb=bcf7ab26e47e2b297cb3f0ded93b677a29bfb4e3;p=openldap

diff --git a/libraries/liblber/io.c b/libraries/liblber/io.c
index c618d0b286..a62161495a 100644
--- a/libraries/liblber/io.c
+++ b/libraries/liblber/io.c
@@ -1,11 +1,19 @@
 /* io.c - ber general i/o routines */
 /* $OpenLDAP$ */
-/*
- * Copyright 1998-2003 The OpenLDAP Foundation, All Rights Reserved.
- * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2012 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in the file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
  */
-/* Portions
- * Copyright (c) 1990 Regents of the University of Michigan.
+/* Portions Copyright (c) 1990 Regents of the University of Michigan.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms are permitted
@@ -15,6 +23,10 @@
  * software without specific prior written permission. This software
  * is provided ``as is'' without express or implied warranty.
  */
+/* ACKNOWLEDGEMENTS:
+ * This work was originally developed by the University of Michigan
+ * (as part of U-MICH LDAP).
+ */
 
 #include "portable.h"
 
@@ -35,6 +47,28 @@
 #include "lber-int.h"
 #include "ldap_log.h"
 
+ber_slen_t
+ber_skip_data(
+	BerElement *ber,
+	ber_len_t len )
+{
+	ber_len_t	actuallen, nleft;
+
+	assert( ber != NULL );
+	assert( LBER_VALID( ber ) );
+
+	nleft = ber_pvt_ber_remaining( ber );
+	actuallen = nleft < len ? nleft : len;
+	ber->ber_ptr += actuallen;
+	ber->ber_tag = *(unsigned char *)ber->ber_ptr;
+
+	return( (ber_slen_t) actuallen );
+}
+
+/*
+ * Read from the ber buffer.  The caller must maintain ber->ber_tag.
+ * Do not use to read whole tags.  See ber_get_tag() and ber_skip_data().
+ */
 ber_slen_t
 ber_read(
 	BerElement *ber,
@@ -45,7 +79,6 @@ ber_read(
 
 	assert( ber != NULL );
 	assert( buf != NULL );
-
 	assert( LBER_VALID( ber ) );
 
 	nleft = ber_pvt_ber_remaining( ber );
@@ -58,51 +91,54 @@ ber_read(
 	return( (ber_slen_t) actuallen );
 }
 
+/*
+ * Write to the ber buffer.
+ * Note that ber_start_seqorset/ber_put_seqorset() bypass ber_write().
+ */
 ber_slen_t
 ber_write(
 	BerElement *ber,
 	LDAP_CONST char *buf,
 	ber_len_t len,
-	int nosos )
+	int zero )	/* nonzero is unsupported from OpenLDAP 2.4.18 */
 {
+	char **p;
+
 	assert( ber != NULL );
 	assert( buf != NULL );
-
 	assert( LBER_VALID( ber ) );
 
-	if ( nosos || ber->ber_sos == NULL ) {
-		if ( ber->ber_ptr + len > ber->ber_end ) {
-			if ( ber_realloc( ber, len ) != 0 )
-				return( -1 );
-		}
-		AC_MEMCPY( ber->ber_ptr, buf, (size_t)len );
-		ber->ber_ptr += len;
-		return( (ber_slen_t) len );
+	if ( zero != 0 ) {
+		ber_log_printf( LDAP_DEBUG_ANY, ber->ber_debug, "%s",
+			"ber_write: nonzero 4th argument not supported\n" );
+		return( -1 );
+	}
 
-	} else {
-		if ( ber->ber_sos->sos_ptr + len > ber->ber_end ) {
-			if ( ber_realloc( ber, len ) != 0 )
-				return( -1 );
-		}
-		AC_MEMCPY( ber->ber_sos->sos_ptr, buf, (size_t)len );
-		ber->ber_sos->sos_ptr += len;
-		ber->ber_sos->sos_clen += len;
-		return( (ber_slen_t) len );
+	p = ber->ber_sos_ptr == NULL ? &ber->ber_ptr : &ber->ber_sos_ptr;
+	if ( len > (ber_len_t) (ber->ber_end - *p) ) {
+		if ( ber_realloc( ber, len ) != 0 ) return( -1 );
 	}
+	AC_MEMCPY( *p, buf, len );
+	*p += len;
+
+	return( (ber_slen_t) len );
 }
 
+/* Resize the ber buffer */
 int
 ber_realloc( BerElement *ber, ber_len_t len )
 {
-	ber_len_t	total;
-	Seqorset	*s;
-	long		off;
-	char		*oldbuf;
+	ber_len_t	total, offset, sos_offset;
+	char		*buf;
 
 	assert( ber != NULL );
-	assert( len > 0 );
 	assert( LBER_VALID( ber ) );
 
+	/* leave room for ber_flatten() to \0-terminate ber_buf */
+	if ( ++len == 0 ) {
+		return( -1 );
+	}
+
 	total = ber_pvt_ber_total( ber );
 
 #define LBER_EXBUFSIZ	4060 /* a few words less than 2^N for binary buddy */
@@ -111,7 +147,7 @@ ber_realloc( BerElement *ber, ber_len_t len )
 	/* don't realloc by small amounts */
 	total += len < LBER_EXBUFSIZ ? LBER_EXBUFSIZ : len;
 # else
-	{	/* not sure what value this adds */
+	{	/* not sure what value this adds.  reduce fragmentation? */
 		ber_len_t have = (total + (LBER_EXBUFSIZE - 1)) / LBER_EXBUFSIZ;
 		ber_len_t need = (len + (LBER_EXBUFSIZ - 1)) / LBER_EXBUFSIZ;
 		total = ( have + need ) * LBER_EXBUFSIZ;
@@ -121,83 +157,70 @@ ber_realloc( BerElement *ber, ber_len_t len )
 	total += len;	/* realloc just what's needed */
 #endif
 
-	oldbuf = ber->ber_buf;
-
-	ber->ber_buf = (char *) ber_memrealloc_x( oldbuf, total, ber->ber_memctx );
-	
-	if ( ber->ber_buf == NULL ) {
-		ber->ber_buf = oldbuf;
+	if ( total < len || total > (ber_len_t)-1 / 2 /* max ber_slen_t */ ) {
 		return( -1 );
 	}
 
-	ber->ber_end = ber->ber_buf + total;
-
-	/*
-	 * If the stinking thing was moved, we need to go through and
-	 * reset all the sos and ber pointers.	Offsets would've been
-	 * a better idea... oh well.
-	 */
-
-	if ( ber->ber_buf != oldbuf ) {
-		ber->ber_ptr = ber->ber_buf + (ber->ber_ptr - oldbuf);
+	buf = ber->ber_buf;
+	offset = ber->ber_ptr - buf;
+	sos_offset = ber->ber_sos_ptr ? ber->ber_sos_ptr - buf : 0;
+	/* if ber_sos_ptr != NULL, it is > ber_buf so that sos_offset > 0 */
 
-		for ( s = ber->ber_sos; s != NULL; s = s->sos_next ) {
-			off = s->sos_first - oldbuf;
-			s->sos_first = ber->ber_buf + off;
-
-			off = s->sos_ptr - oldbuf;
-			s->sos_ptr = ber->ber_buf + off;
-		}
+	buf = (char *) ber_memrealloc_x( buf, total, ber->ber_memctx );
+	if ( buf == NULL ) {
+		return( -1 );
 	}
 
+	ber->ber_buf = buf;
+	ber->ber_end = buf + total;
+	ber->ber_ptr = buf + offset;
+	if ( sos_offset )
+		ber->ber_sos_ptr = buf + sos_offset;
+
 	return( 0 );
 }
 
 void
 ber_free_buf( BerElement *ber )
 {
-	Seqorset *s, *next;
-
 	assert( LBER_VALID( ber ) );
 
 	if ( ber->ber_buf) ber_memfree_x( ber->ber_buf, ber->ber_memctx );
 
-	for( s = ber->ber_sos ; s != NULL ; s = next ) {
-		next = s->sos_next;
-		ber_memfree_x( s, ber->ber_memctx );
-	}
-
 	ber->ber_buf = NULL;
-	ber->ber_sos = NULL;
+	ber->ber_sos_ptr = NULL;
 	ber->ber_valid = LBER_UNINITIALIZED;
 }
 
 void
 ber_free( BerElement *ber, int freebuf )
 {
-#ifdef LDAP_MEMORY_DEBUG
-	assert( ber != NULL );
-#endif
-
 	if( ber == NULL ) {
+		LDAP_MEMORY_DEBUG_ASSERT( ber != NULL );
 		return;
 	}
 
-	if( freebuf )
-		ber_free_buf( ber );
+	if( freebuf ) ber_free_buf( ber );
 
 	ber_memfree_x( (char *) ber, ber->ber_memctx );
 }
 
 int
 ber_flush( Sockbuf *sb, BerElement *ber, int freeit )
+{
+	return ber_flush2( sb, ber,
+		freeit ? LBER_FLUSH_FREE_ON_SUCCESS
+			: LBER_FLUSH_FREE_NEVER );
+}
+
+int
+ber_flush2( Sockbuf *sb, BerElement *ber, int freeit )
 {
 	ber_len_t	towrite;
-	ber_slen_t	rc;	
+	ber_slen_t	rc;
 
 	assert( sb != NULL );
 	assert( ber != NULL );
-
 	assert( SOCKBUF_VALID( sb ) );
 	assert( LBER_VALID( ber ) );
 
@@ -207,38 +230,32 @@ ber_flush( Sockbuf *sb, BerElement *ber, int freeit )
 	towrite = ber->ber_ptr - ber->ber_rwptr;
 
 	if ( sb->sb_debug ) {
-#ifdef NEW_LOGGING
-		LDAP_LOG( BER, DETAIL1,
-			   "ber_flush: %ld bytes to sd %ld%s\n",
-			   towrite, (long)sb->sb_fd,
-			   ber->ber_rwptr != ber->ber_buf ? " (re-flush)" : "" );
-
-		if(LDAP_LOGS_TEST(BER, DETAIL2))
-				BER_DUMP(( "liblber", LDAP_LEVEL_DETAIL2, ber, 1 ));
-
-#else
 		ber_log_printf( LDAP_DEBUG_TRACE, sb->sb_debug,
-			"ber_flush: %ld bytes to sd %ld%s\n",
+			"ber_flush2: %ld bytes to sd %ld%s\n",
 			towrite, (long) sb->sb_fd,
 			ber->ber_rwptr != ber->ber_buf ?  " (re-flush)" : "" );
-		ber_log_bprint( LDAP_DEBUG_PACKETS, sb->sb_debug,
+		ber_log_bprint( LDAP_DEBUG_BER, sb->sb_debug,
 			ber->ber_rwptr, towrite );
-#endif
 	}
 
 	while ( towrite > 0 ) {
+#ifdef LBER_TRICKLE
+		sleep(1);
+		rc = ber_int_sb_write( sb, ber->ber_rwptr, 1 );
+#else
 		rc = ber_int_sb_write( sb, ber->ber_rwptr, towrite );
-		if (rc<=0) {
+#endif
+		if ( rc <= 0 ) {
+			if ( freeit & LBER_FLUSH_FREE_ON_ERROR ) ber_free( ber, 1 );
 			return -1;
 		}
 		towrite -= rc;
 		ber->ber_rwptr += rc;
 	} 
 
-	if ( freeit )
-		ber_free( ber, 1 );
+	if ( freeit & LBER_FLUSH_FREE_ON_SUCCESS ) ber_free( ber, 1 );
 
-	return( 0 );
+	return 0;
 }
 
 BerElement *
@@ -246,8 +263,6 @@ ber_alloc_t( int options )
 {
 	BerElement	*ber;
 
-    ber_int_options.lbo_valid = LBER_INITIALIZED;
-
 	ber = (BerElement *) LBER_CALLOC( 1, sizeof(BerElement) );
 
 	if ( ber == NULL ) {
@@ -299,8 +314,6 @@ ber_init2( BerElement *ber, struct berval *bv, int options )
 {
 	assert( ber != NULL );
 
-	ber_int_options.lbo_valid = LBER_INITIALIZED;
-
 	(void) memset( (char *)ber, '\0', sizeof( BerElement ));
 	ber->ber_valid = LBER_VALID_BERELEMENT;
 	ber->ber_tag = LBER_DEFAULT;
@@ -334,8 +347,6 @@ ber_init( struct berval *bv )
 
 	assert( bv != NULL );
 
-    ber_int_options.lbo_valid = LBER_INITIALIZED;
-
 	if ( bv == NULL ) {
 		return NULL;
 	}
@@ -375,8 +386,6 @@ int ber_flatten2(
 {
 	assert( bv != NULL );
 
-	ber_int_options.lbo_valid = LBER_INITIALIZED;
-
 	if ( bv == NULL ) {
 		return -1;
 	}
@@ -386,6 +395,10 @@ int ber_flatten2(
 		bv->bv_val = NULL;
 		bv->bv_len = 0;
 
+	} else if ( ber->ber_sos_ptr != NULL ) {
+		/* unmatched "{" and "}" */
+		return -1;
+
 	} else {
 		/* copy the berval */
 		ber_len_t len = ber_pvt_ber_write( ber );
@@ -396,10 +409,13 @@ int ber_flatten2(
 				return -1;
 			}
 			AC_MEMCPY( bv->bv_val, ber->ber_buf, len );
-		} else {
+			bv->bv_val[len] = '\0';
+		} else if ( ber->ber_buf != NULL ) {
 			bv->bv_val = ber->ber_buf;
+			bv->bv_val[len] = '\0';
+		} else {
+			bv->bv_val = "";
 		}
-		bv->bv_val[len] = '\0';
 		bv->bv_len = len;
 	}
 	return 0;
@@ -414,8 +430,6 @@ int ber_flatten(
  
 	assert( bvPtr != NULL );
 
-	ber_int_options.lbo_valid = LBER_INITIALIZED;
-
 	if(bvPtr == NULL) {
 		return -1;
 	}
@@ -467,16 +481,13 @@ ber_get_next(
 	assert( sb != NULL );
 	assert( len != NULL );
 	assert( ber != NULL );
-
 	assert( SOCKBUF_VALID( sb ) );
 	assert( LBER_VALID( ber ) );
 
-#ifdef NEW_LOGGING
-	LDAP_LOG( BER, ENTRY, "ber_get_next: enter\n", 0, 0, 0 );
-#else
-	ber_log_printf( LDAP_DEBUG_TRACE, ber->ber_debug,
-		"ber_get_next\n" );
-#endif
+	if ( ber->ber_debug & LDAP_DEBUG_TRACE ) {
+		ber_log_printf( LDAP_DEBUG_TRACE, ber->ber_debug,
+			"ber_get_next\n" );
+	}
 
 	/*
 	 * Any ber element looks like this: tag length contents.
@@ -500,23 +511,25 @@ ber_get_next(
 	 */
 
 	if (ber->ber_rwptr == NULL) {
-#if 0
-		/* XXYYZ - dtest does like this assert.  */
 		assert( ber->ber_buf == NULL );
-#endif
 		ber->ber_rwptr = (char *) &ber->ber_len-1;
 		ber->ber_ptr = ber->ber_rwptr;
 		ber->ber_tag = 0;
 	}
 
 	while (ber->ber_rwptr > (char *)&ber->ber_tag && ber->ber_rwptr <
-		(char *)&ber->ber_len + LENSIZE*2 -1) {
+		(char *)&ber->ber_len + LENSIZE*2) {
 		ber_slen_t sblen;
 		char buf[sizeof(ber->ber_len)-1];
 		ber_len_t tlen = 0;
 
-		sblen=ber_int_sb_read( sb, ber->ber_rwptr,
-			((char *)&ber->ber_len + LENSIZE*2 - 1)-ber->ber_rwptr);
+		/* The tag & len can be at most 9 bytes; we try to read up to 8 here */
+		sock_errset(0);
+		sblen=((char *)&ber->ber_len + LENSIZE*2 - 1)-ber->ber_rwptr;
+		/* Trying to read the last len byte of a 9 byte tag+len */
+		if (sblen<1)
+			sblen = 1;
+		sblen=ber_int_sb_read( sb, ber->ber_rwptr, sblen );
 		if (sblen<=0) return LBER_DEFAULT;
 		ber->ber_rwptr += sblen;
 
@@ -527,58 +540,62 @@ ber_get_next(
 			tag = *p++;
 			if ((tag & LBER_BIG_TAG_MASK) == LBER_BIG_TAG_MASK) {
 				ber_len_t i;
-				for (i=1; (char *)p<ber->ber_rwptr; i++,p++) {
+				for (i=1; (char *)p<ber->ber_rwptr; i++) {
 					tag <<= 8;
-					tag |= *p;
-					if (!(*p & LBER_MORE_TAG_MASK))
+					tag |= *p++;
+					if (!(tag & LBER_MORE_TAG_MASK))
 						break;
 					/* Is the tag too big? */
 					if (i == sizeof(ber_tag_t)-1) {
-						errno = ERANGE;
+						sock_errset(ERANGE);
 						return LBER_DEFAULT;
 					}
 				}
 				/* Did we run out of bytes? */
 				if ((char *)p == ber->ber_rwptr) {
+					sock_errset(EWOULDBLOCK);
 					return LBER_DEFAULT;
 				}
-				p++;
 			}
 			ber->ber_tag = tag;
 			ber->ber_ptr = (char *)p;
+		}
 
-			if (sblen == 1) continue;
+		if ( ber->ber_ptr == ber->ber_rwptr ) {
+			sock_errset(EWOULDBLOCK);
+			return LBER_DEFAULT;
 		}
 
 		/* Now look for the length */
 		if (*ber->ber_ptr & 0x80) {	/* multi-byte */
-			ber_len_t i;
-			int llen = *(unsigned char *)ber->ber_ptr++ & 0x7f;
-			if (llen > (int)sizeof(ber_len_t)) {
-				errno = ERANGE;
+			int i;
+			unsigned char *p = (unsigned char *)ber->ber_ptr;
+			int llen = *p++ & 0x7f;
+			if (llen > LENSIZE) {
+				sock_errset(ERANGE);
 				return LBER_DEFAULT;
 			}
 			/* Not enough bytes? */
-			if (ber->ber_rwptr - ber->ber_ptr < llen) {
+			if (ber->ber_rwptr - (char *)p < llen) {
+				sock_errset(EWOULDBLOCK);
 				return LBER_DEFAULT;
 			}
-			for (i=0;
-				i<llen && ber->ber_ptr<ber->ber_rwptr;
-				i++,ber->ber_ptr++)
-			{
+			for (i=0; i<llen; i++) {
 				tlen <<=8;
-				tlen |= *(unsigned char *)ber->ber_ptr;
+				tlen |= *p++;
 			}
+			ber->ber_ptr = (char *)p;
 		} else {
 			tlen = *(unsigned char *)ber->ber_ptr++;
 		}
 
 		/* Are there leftover data bytes inside ber->ber_len? */
 		if (ber->ber_ptr < (char *)&ber->ber_usertag) {
-			if (ber->ber_rwptr < (char *)&ber->ber_usertag)
+			if (ber->ber_rwptr < (char *)&ber->ber_usertag) {
 				sblen = ber->ber_rwptr - ber->ber_ptr;
-			else
+			} else {
 				sblen = (char *)&ber->ber_usertag - ber->ber_ptr;
+			}
 			AC_MEMCPY(buf, ber->ber_ptr, sblen);
 			ber->ber_ptr += sblen;
 		} else {
@@ -590,21 +607,15 @@ ber_get_next(
 
 		/* make sure length is reasonable */
 		if ( ber->ber_len == 0 ) {
-			errno = ERANGE;
+			sock_errset(ERANGE);
 			return LBER_DEFAULT;
 		}
 
 		if ( sb->sb_max_incoming && ber->ber_len > sb->sb_max_incoming ) {
-#ifdef NEW_LOGGING
-			LDAP_LOG( BER, ERR, 
-				"ber_get_next: sockbuf_max_incoming exceeded "
-				"(%d > %d)\n", ber->ber_len, sb->sb_max_incoming, 0 );
-#else
 			ber_log_printf( LDAP_DEBUG_CONNS, ber->ber_debug,
 				"ber_get_next: sockbuf_max_incoming exceeded "
 				"(%ld > %ld)\n", ber->ber_len, sb->sb_max_incoming );
-#endif
-			errno = ERANGE;
+			sock_errset(ERANGE);
 			return LBER_DEFAULT;
 		}
 
@@ -615,7 +626,7 @@ ber_get_next(
 			 * already read.
 			 */
 			if ( ber->ber_len < sblen + l ) {
-				errno = ERANGE;
+				sock_errset(ERANGE);
 				return LBER_DEFAULT;
 			}
 			ber->ber_buf = (char *) ber_memalloc_x( ber->ber_len + 1, ber->ber_memctx );
@@ -630,6 +641,7 @@ ber_get_next(
 				AC_MEMCPY(ber->ber_buf + sblen, ber->ber_ptr, l);
 				sblen += l;
 			}
+			*ber->ber_end = '\0';
 			ber->ber_ptr = ber->ber_buf;
 			ber->ber_usertag = 0;
 			if ((ber_len_t)sblen == ber->ber_len) {
@@ -646,34 +658,23 @@ ber_get_next(
 		to_go = ber->ber_end - ber->ber_rwptr;
 		assert( to_go > 0 );
 		
+		sock_errset(0);
 		res = ber_int_sb_read( sb, ber->ber_rwptr, to_go );
 		if (res<=0) return LBER_DEFAULT;
 		ber->ber_rwptr+=res;
 		
 		if (res<to_go) {
-#if defined( EWOULDBLOCK )
-			errno = EWOULDBLOCK;
-#elif defined( EAGAIN )
-			errno = EAGAIN;
-#endif			
+			sock_errset(EWOULDBLOCK);
 			return LBER_DEFAULT;
 		}
 done:
 		ber->ber_rwptr = NULL;
 		*len = ber->ber_len;
 		if ( ber->ber_debug ) {
-#ifdef NEW_LOGGING
-			LDAP_LOG( BER, DETAIL1, 
-				"ber_get_next: tag 0x%lx len %ld\n", 
-				ber->ber_tag, ber->ber_len, 0  );
-			if(LDAP_LOGS_TEST(BER, DETAIL2))
-					BER_DUMP(( "liblber", LDAP_LEVEL_DETAIL2, ber, 1 ));
-#else
 			ber_log_printf( LDAP_DEBUG_TRACE, ber->ber_debug,
 				"ber_get_next: tag 0x%lx len %ld contents:\n",
 				ber->ber_tag, ber->ber_len );
 			ber_log_dump( LDAP_DEBUG_BER, ber->ber_debug, ber, 1 );
-#endif
 		}
 		return (ber->ber_tag);
 	}
@@ -704,7 +705,17 @@ void
 ber_rewind ( BerElement * ber )
 {
 	ber->ber_rwptr = NULL;
-	ber->ber_sos = NULL;
+	ber->ber_sos_ptr = NULL;
 	ber->ber_end = ber->ber_ptr;
 	ber->ber_ptr = ber->ber_buf;
+#if 0	/* TODO: Should we add this? */
+	ber->ber_tag = LBER_DEFAULT;
+	ber->ber_usertag = 0;
+#endif
+}
+
+int
+ber_remaining( BerElement * ber )
+{
+	return ber_pvt_ber_remaining( ber );
 }