diff options
Diffstat (limited to 'librpc/rpc/dcerpc_util.c')
| -rw-r--r-- | librpc/rpc/dcerpc_util.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/librpc/rpc/dcerpc_util.c b/librpc/rpc/dcerpc_util.c index df149481559..e978b7ef17d 100644 --- a/librpc/rpc/dcerpc_util.c +++ b/librpc/rpc/dcerpc_util.c @@ -63,6 +63,50 @@ uint8_t dcerpc_get_endian_flag(DATA_BLOB *blob) return blob->data[DCERPC_DREP_OFFSET]; } +/** +* @brief Decodes a ncacn_packet +* +* @param mem_ctx The memory context on which to allocate the packet +* elements +* @param blob The blob of data to decode +* @param r An empty ncacn_packet, must not be NULL +* +* @return a NTSTATUS error code +*/ +NTSTATUS dcerpc_pull_ncacn_packet(TALLOC_CTX *mem_ctx, + const DATA_BLOB *blob, + struct ncacn_packet *r) +{ + enum ndr_err_code ndr_err; + struct ndr_pull *ndr; + + ndr = ndr_pull_init_blob(blob, mem_ctx); + if (!ndr) { + return NT_STATUS_NO_MEMORY; + } + + if (!(CVAL(ndr->data, DCERPC_DREP_OFFSET) & DCERPC_DREP_LE)) { + ndr->flags |= LIBNDR_FLAG_BIGENDIAN; + } + + if (CVAL(ndr->data, DCERPC_PFC_OFFSET) & DCERPC_PFC_FLAG_OBJECT_UUID) { + ndr->flags |= LIBNDR_FLAG_OBJECT_PRESENT; + } + + ndr_err = ndr_pull_ncacn_packet(ndr, NDR_SCALARS|NDR_BUFFERS, r); + + if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) { + talloc_free(ndr); + return ndr_map_error2ntstatus(ndr_err); + } + talloc_free(ndr); + + if (r->frag_length != blob->length) { + return NT_STATUS_RPC_PROTOCOL_ERROR; + } + + return NT_STATUS_OK; +} /** * @brief Pull a dcerpc_auth structure, taking account of any auth |