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authorStefan Metzmacher <metze@samba.org>2008-08-19 10:29:40 +0200
committerStefan Metzmacher <metze@samba.org>2008-08-20 15:22:04 +0200
commit17fcc4118f4d104d314e0acb0eae87954654a1a5 (patch)
treede898788b9695a4ee40840131837032f58035cb0 /source4
parentf4e2f3f14c06f6de59bbacc899a2bfe6cfbcfeb2 (diff)
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ndr_compression: unify the common handling of mszip and xpress compression
metze (This used to be commit 925a2066ffa18a86704a8ee1a7a6908e0cd65a2a)
Diffstat (limited to 'source4')
-rw-r--r--source4/librpc/ndr/ndr_compression.c140
1 files changed, 33 insertions, 107 deletions
diff --git a/source4/librpc/ndr/ndr_compression.c b/source4/librpc/ndr/ndr_compression.c
index 7c2aca72e9..ad8dda1f6e 100644
--- a/source4/librpc/ndr/ndr_compression.c
+++ b/source4/librpc/ndr/ndr_compression.c
@@ -145,80 +145,6 @@ static enum ndr_err_code ndr_pull_compression_mszip_chunk(struct ndr_pull *ndrpu
return NDR_ERR_SUCCESS;
}
-static enum ndr_err_code ndr_pull_compression_mszip(struct ndr_pull *subndr,
- struct ndr_pull **_comndr,
- ssize_t decompressed_len)
-{
- 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;
- z_stream z;
- bool last = false;
-
- ndrpush = ndr_push_init_ctx(subndr, subndr->iconv_convenience);
- NDR_ERR_HAVE_NO_MEMORY(ndrpush);
-
- ZERO_STRUCT(z);
-
- while (!last) {
- NDR_CHECK(ndr_pull_compression_mszip_chunk(subndr, ndrpush, &z, &last));
- }
-
- uncompressed = ndr_push_blob(ndrpush);
-
- if (uncompressed.length != decompressed_len) {
- return ndr_pull_error(subndr, NDR_ERR_COMPRESSION, "Bad MSZIP uncompressed_len [%u] != [%d] (PULL)",
- (int)uncompressed.length, (int)decompressed_len);
- }
-
- comndr = talloc_zero(subndr, struct ndr_pull);
- NDR_ERR_HAVE_NO_MEMORY(comndr);
- comndr->flags = subndr->flags;
- comndr->current_mem_ctx = subndr->current_mem_ctx;
-
- comndr->data = uncompressed.data;
- comndr->data_size = uncompressed.length;
- comndr->offset = 0;
-
- 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 MSZIP payload_header[0] [0x%08X] != [0x00081001] (PULL)",
- payload_header[0]);
- }
- if (payload_header[1] != 0xCCCCCCCC) {
- return ndr_pull_error(subndr, NDR_ERR_COMPRESSION, "Bad MSZIP 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 MSZIP 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;
-}
-
static enum ndr_err_code ndr_push_compression_mszip(struct ndr_push *subndr,
struct ndr_push *comndr)
{
@@ -268,9 +194,20 @@ static enum ndr_err_code ndr_pull_compression_xpress_chunk(struct ndr_pull *ndrp
return NDR_ERR_SUCCESS;
}
-static enum ndr_err_code ndr_pull_compression_xpress(struct ndr_pull *subndr,
- struct ndr_pull **_comndr,
- ssize_t decompressed_len)
+static enum ndr_err_code ndr_push_compression_xpress(struct ndr_push *subndr,
+ struct ndr_push *comndr)
+{
+ return ndr_push_error(subndr, NDR_ERR_COMPRESSION, "XPRESS compression is not supported yet (PUSH)");
+}
+
+/*
+ handle compressed subcontext buffers, which in midl land are user-marshalled, but
+ we use magic in pidl to make them easier to cope with
+*/
+enum ndr_err_code ndr_pull_compression_start(struct ndr_pull *subndr,
+ struct ndr_pull **_comndr,
+ enum ndr_compression_alg compression_alg,
+ ssize_t decompressed_len)
{
struct ndr_push *ndrpush;
struct ndr_pull *comndr;
@@ -280,18 +217,34 @@ static enum ndr_err_code ndr_pull_compression_xpress(struct ndr_pull *subndr,
uint32_t payload_offset;
uint8_t *payload;
bool last = false;
+ z_stream z;
ndrpush = ndr_push_init_ctx(subndr, subndr->iconv_convenience);
NDR_ERR_HAVE_NO_MEMORY(ndrpush);
- while (!last) {
- NDR_CHECK(ndr_pull_compression_xpress_chunk(subndr, ndrpush, &last));
+ switch (compression_alg) {
+ case NDR_COMPRESSION_MSZIP:
+ ZERO_STRUCT(z);
+ while (!last) {
+ NDR_CHECK(ndr_pull_compression_mszip_chunk(subndr, ndrpush, &z, &last));
+ }
+ break;
+
+ case NDR_COMPRESSION_XPRESS:
+ while (!last) {
+ NDR_CHECK(ndr_pull_compression_xpress_chunk(subndr, ndrpush, &last));
+ }
+ break;
+
+ default:
+ return ndr_pull_error(subndr, NDR_ERR_COMPRESSION, "Bad compression algorithm %d (PULL)",
+ compression_alg);
}
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)",
+ "Bad uncompressed_len [%u] != [%u](0x%08X) (PULL)",
(int)uncompressed.length,
(int)decompressed_len,
(int)decompressed_len);
@@ -344,33 +297,6 @@ static enum ndr_err_code ndr_pull_compression_xpress(struct ndr_pull *subndr,
return NDR_ERR_SUCCESS;
}
-static enum ndr_err_code ndr_push_compression_xpress(struct ndr_push *subndr,
- struct ndr_push *comndr)
-{
- return ndr_push_error(subndr, NDR_ERR_COMPRESSION, "XPRESS compression is not supported yet (PUSH)");
-}
-
-/*
- handle compressed subcontext buffers, which in midl land are user-marshalled, but
- we use magic in pidl to make them easier to cope with
-*/
-enum ndr_err_code ndr_pull_compression_start(struct ndr_pull *subndr,
- struct ndr_pull **_comndr,
- enum ndr_compression_alg compression_alg,
- ssize_t decompressed_len)
-{
- switch (compression_alg) {
- case NDR_COMPRESSION_MSZIP:
- return ndr_pull_compression_mszip(subndr, _comndr, decompressed_len);
- case NDR_COMPRESSION_XPRESS:
- return ndr_pull_compression_xpress(subndr, _comndr, decompressed_len);
- default:
- return ndr_pull_error(subndr, NDR_ERR_COMPRESSION, "Bad compression algorithm %d (PULL)",
- compression_alg);
- }
- return NDR_ERR_SUCCESS;
-}
-
enum ndr_err_code ndr_pull_compression_end(struct ndr_pull *subndr,
struct ndr_pull *comndr,
enum ndr_compression_alg compression_alg,