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authorMatthieu Suiche <matt@msuiche.net>2008-07-10 09:31:43 +0000
committerStefan Metzmacher <metze@samba.org>2008-08-18 14:52:36 +0200
commitffa18ca49a2e9d179c122c4dff56fe2dcf54c365 (patch)
tree93f8d267d52dbb2978ff02f2407cbc0861805e20 /source4
parentc2221240105b223b6afded16614593d80f74e9d9 (diff)
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librpc/ndr: add support for XPRESS decompression
Signed-off-by: Stefan Metzmacher <metze@samba.org> (This used to be commit 6a9720c99d36a575ea8ed92e94ff6d2fe6f3e27d)
Diffstat (limited to 'source4')
-rw-r--r--source4/librpc/ndr/ndr_compression.c61
1 files changed, 56 insertions, 5 deletions
diff --git a/source4/librpc/ndr/ndr_compression.c b/source4/librpc/ndr/ndr_compression.c
index 86a5a2560e..ffa37f61a3 100644
--- a/source4/librpc/ndr/ndr_compression.c
+++ b/source4/librpc/ndr/ndr_compression.c
@@ -4,6 +4,7 @@
libndr compression support
Copyright (C) Stefan Metzmacher 2005
+ Copyright (C) Matthieu Suiche 2008
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -21,6 +22,7 @@
#include "includes.h"
#include "lib/compression/mszip.h"
+#include "lib/compression/lzxpress.h"
#include "librpc/ndr/libndr.h"
#include "librpc/ndr/ndr_compression.h"
@@ -158,12 +160,12 @@ static enum ndr_err_code ndr_pull_compression_xpress_chunk(struct ndr_pull *ndrp
bool *last)
{
DATA_BLOB comp_chunk;
+ DATA_BLOB plain_chunk;
uint32_t comp_chunk_offset;
+ uint32_t plain_chunk_offset;
uint32_t comp_chunk_size;
uint32_t plain_chunk_size;
- comp_chunk_offset = ndrpull->offset;
-
NDR_CHECK(ndr_pull_uint32(ndrpull, NDR_SCALARS, &plain_chunk_size));
if (plain_chunk_size > 0x00010000) {
return ndr_pull_error(ndrpull, NDR_ERR_COMPRESSION, "Bad XPRESS plain chunk size %08X > 0x00010000 (PULL)",
@@ -172,15 +174,21 @@ static enum ndr_err_code ndr_pull_compression_xpress_chunk(struct ndr_pull *ndrp
NDR_CHECK(ndr_pull_uint32(ndrpull, NDR_SCALARS, &comp_chunk_size));
+ comp_chunk_offset = ndrpull->offset;
NDR_CHECK(ndr_pull_advance(ndrpull, comp_chunk_size));
- comp_chunk.length = comp_chunk_size + 8;
+ comp_chunk.length = comp_chunk_size;
comp_chunk.data = ndrpull->data + comp_chunk_offset;
+ plain_chunk_offset = ndrpush->offset;
+ NDR_CHECK(ndr_push_zero(ndrpush, plain_chunk_size));
+ plain_chunk.length = plain_chunk_size;
+ plain_chunk.data = ndrpush->data + plain_chunk_offset;
+
DEBUG(10,("XPRESS plain_chunk_size: %08X (%u) comp_chunk_size: %08X (%u)\n",
plain_chunk_size, plain_chunk_size, comp_chunk_size, comp_chunk_size));
- /* For now, we just copy over the compressed blob */
- NDR_CHECK(ndr_push_bytes(ndrpush, comp_chunk.data, comp_chunk.length));
+ /* Uncompressing the buffer using LZ Xpress algorithm */
+ lzxpress_decompress(&comp_chunk, &plain_chunk);
if ((plain_chunk_size < 0x00010000) || (ndrpull->offset+4 >= ndrpull->data_size)) {
/* this is the last chunk */
@@ -197,6 +205,10 @@ static enum ndr_err_code ndr_pull_compression_xpress(struct ndr_pull *subndr,
struct ndr_push *ndrpush;
struct ndr_pull *comndr;
DATA_BLOB uncompressed;
+ uint32_t payload_header[4];
+ uint32_t payload_size;
+ uint32_t payload_offset;
+ uint8_t *payload;
bool last = false;
ndrpush = ndr_push_init_ctx(subndr, subndr->iconv_convenience);
@@ -207,6 +219,13 @@ static enum ndr_err_code ndr_pull_compression_xpress(struct ndr_pull *subndr,
}
uncompressed = ndr_push_blob(ndrpush);
+ if (uncompressed.length != decompressed_len) {
+ return ndr_pull_error(subndr, NDR_ERR_COMPRESSION,
+ "Bad XPRESS uncompressed_len [%u] != [%u](0x%08X) (PULL)",
+ (int)uncompressed.length,
+ (int)decompressed_len,
+ (int)decompressed_len);
+ }
comndr = talloc_zero(subndr, struct ndr_pull);
NDR_ERR_HAVE_NO_MEMORY(comndr);
@@ -219,6 +238,38 @@ static enum ndr_err_code ndr_pull_compression_xpress(struct ndr_pull *subndr,
comndr->iconv_convenience = talloc_reference(comndr, subndr->iconv_convenience);
+ NDR_CHECK(ndr_pull_uint32(comndr, NDR_SCALARS, &payload_header[0]));
+ NDR_CHECK(ndr_pull_uint32(comndr, NDR_SCALARS, &payload_header[1]));
+ NDR_CHECK(ndr_pull_uint32(comndr, NDR_SCALARS, &payload_header[2]));
+ NDR_CHECK(ndr_pull_uint32(comndr, NDR_SCALARS, &payload_header[3]));
+
+ if (payload_header[0] != 0x00081001) {
+ return ndr_pull_error(subndr, NDR_ERR_COMPRESSION,
+ "Bad XPRESS payload_header[0] [0x%08X] != [0x00081001] (PULL)",
+ payload_header[0]);
+ }
+ if (payload_header[1] != 0xCCCCCCCC) {
+ return ndr_pull_error(subndr, NDR_ERR_COMPRESSION,
+ "Bad XPRESS payload_header[1] [0x%08X] != [0xCCCCCCCC] (PULL)",
+ payload_header[1]);
+ }
+
+ payload_size = payload_header[2];
+
+ if (payload_header[3] != 0x00000000) {
+ return ndr_pull_error(subndr, NDR_ERR_COMPRESSION,
+ "Bad XPRESS payload_header[3] [0x%08X] != [0x00000000] (PULL)",
+ payload_header[3]);
+ }
+
+ payload_offset = comndr->offset;
+ NDR_CHECK(ndr_pull_advance(comndr, payload_size));
+ payload = comndr->data + payload_offset;
+
+ comndr->data = payload;
+ comndr->data_size = payload_size;
+ comndr->offset = 0;
+
*_comndr = comndr;
return NDR_ERR_SUCCESS;
}