/* Unix SMB/CIFS implementation. libndr interface Copyright (C) Andrew Tridgell 2003 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 the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ /* this provides the core routines for NDR parsing functions see http://www.opengroup.org/onlinepubs/9629399/chap14.htm for details of NDR encoding rules */ #include "includes.h" #include "librpc/ndr/libndr.h" #include "lib/util/dlinklist.h" #include "librpc/gen_ndr/dcerpc.h" #define NDR_BASE_MARSHALL_SIZE 1024 /* this guid indicates NDR encoding in a protocol tower */ const struct dcerpc_syntax_id ndr_transfer_syntax = { { 0x8a885d04, 0x1ceb, 0x11c9, {0x9f, 0xe8}, {0x08,0x00,0x2b,0x10,0x48,0x60} }, 2 }; const struct dcerpc_syntax_id ndr64_transfer_syntax = { { 0x71710533, 0xbeba, 0x4937, {0x83, 0x19}, {0xb5,0xdb,0xef,0x9c,0xcc,0x36} }, 1 }; /* work out the number of bytes needed to align on a n byte boundary */ _PUBLIC_ size_t ndr_align_size(uint32_t offset, size_t n) { if ((offset & (n-1)) == 0) return 0; return n - (offset & (n-1)); } /* initialise a ndr parse structure from a data blob */ _PUBLIC_ struct ndr_pull *ndr_pull_init_blob(const DATA_BLOB *blob, TALLOC_CTX *mem_ctx) { struct ndr_pull *ndr; ndr = talloc_zero(mem_ctx, struct ndr_pull); if (!ndr) return NULL; ndr->current_mem_ctx = mem_ctx; ndr->data = blob->data; ndr->data_size = blob->length; return ndr; } /* advance by 'size' bytes */ _PUBLIC_ NTSTATUS ndr_pull_advance(struct ndr_pull *ndr, uint32_t size) { ndr->offset += size; if (ndr->offset > ndr->data_size) { return ndr_pull_error(ndr, NDR_ERR_BUFSIZE, "ndr_pull_advance by %u failed", size); } return NT_STATUS_OK; } /* set the parse offset to 'ofs' */ static NTSTATUS ndr_pull_set_offset(struct ndr_pull *ndr, uint32_t ofs) { ndr->offset = ofs; if (ndr->offset > ndr->data_size) { return ndr_pull_error(ndr, NDR_ERR_BUFSIZE, "ndr_pull_set_offset %u failed", ofs); } return NT_STATUS_OK; } /* save the offset/size of the current ndr state */ _PUBLIC_ void ndr_pull_save(struct ndr_pull *ndr, struct ndr_pull_save *save) { save->offset = ndr->offset; save->data_size = ndr->data_size; } /* restore the size/offset of a ndr structure */ _PUBLIC_ void ndr_pull_restore(struct ndr_pull *ndr, struct ndr_pull_save *save) { ndr->offset = save->offset; ndr->data_size = save->data_size; } /* create a ndr_push structure, ready for some marshalling */ _PUBLIC_ struct ndr_push *ndr_push_init_ctx(TALLOC_CTX *mem_ctx) { struct ndr_push *ndr; ndr = talloc_zero(mem_ctx, struct ndr_push); if (!ndr) { return NULL; } ndr->flags = 0; ndr->alloc_size = NDR_BASE_MARSHALL_SIZE; ndr->data = talloc_array(ndr, uint8_t, ndr->alloc_size); if (!ndr->data) { return NULL; } return ndr; } /* create a ndr_push structure, ready for some marshalling */ _PUBLIC_ struct ndr_push *ndr_push_init(void) { return ndr_push_init_ctx(NULL); } /* free a ndr_push structure */ _PUBLIC_ void ndr_push_free(struct ndr_push *ndr) { talloc_free(ndr); } /* return a DATA_BLOB structure for the current ndr_push marshalled data */ _PUBLIC_ DATA_BLOB ndr_push_blob(struct ndr_push *ndr) { DATA_BLOB blob; blob.data = ndr->data; blob.length = ndr->offset; if (ndr->alloc_size > ndr->offset) { ndr->data[ndr->offset] = 0; } return blob; } /* expand the available space in the buffer to 'size' */ _PUBLIC_ NTSTATUS ndr_push_expand(struct ndr_push *ndr, uint32_t size) { if (ndr->alloc_size > size) { return NT_STATUS_OK; } ndr->alloc_size += NDR_BASE_MARSHALL_SIZE; if (size+1 > ndr->alloc_size) { ndr->alloc_size = size+1; } ndr->data = talloc_realloc(ndr, ndr->data, uint8_t, ndr->alloc_size); if (!ndr->data) { return ndr_push_error(ndr, NDR_ERR_ALLOC, "Failed to push_expand to %u", ndr->alloc_size); } return NT_STATUS_OK; } _PUBLIC_ void ndr_print_debug_helper(struct ndr_print *ndr, const char *format, ...) _PRINTF_ATTRIBUTE(2,3) { va_list ap; char *s = NULL; int i; va_start(ap, format); vasprintf(&s, format, ap); va_end(ap); for (i=0;i<ndr->depth;i++) { DEBUG(0,(" ")); } DEBUG(0,("%s\n", s)); free(s); } _PUBLIC_ void ndr_print_string_helper(struct ndr_print *ndr, const char *format, ...) _PRINTF_ATTRIBUTE(2,3) { va_list ap; int i; for (i=0;i<ndr->depth;i++) { ndr->private_data = talloc_asprintf_append(ndr->private_data, " "); } va_start(ap, format); ndr->private_data = talloc_vasprintf_append(ndr->private_data, format, ap); va_end(ap); ndr->private_data = talloc_asprintf_append(ndr->private_data, "\n"); } /* a useful helper function for printing idl structures via DEBUG() */ _PUBLIC_ void ndr_print_debug(ndr_print_fn_t fn, const char *name, void *ptr) { struct ndr_print *ndr; ndr = talloc_zero(NULL, struct ndr_print); if (!ndr) return; ndr->print = ndr_print_debug_helper; ndr->depth = 1; ndr->flags = 0; fn(ndr, name, ptr); talloc_free(ndr); } /* a useful helper function for printing idl unions via DEBUG() */ _PUBLIC_ void ndr_print_union_debug(ndr_print_fn_t fn, const char *name, uint32_t level, void *ptr) { struct ndr_print *ndr; ndr = talloc_zero(NULL, struct ndr_print); if (!ndr) return; ndr->print = ndr_print_debug_helper; ndr->depth = 1; ndr->flags = 0; ndr_print_set_switch_value(ndr, ptr, level); fn(ndr, name, ptr); talloc_free(ndr); } /* a useful helper function for printing idl function calls via DEBUG() */ _PUBLIC_ void ndr_print_function_debug(ndr_print_function_t fn, const char *name, int flags, void *ptr) { struct ndr_print *ndr; ndr = talloc_zero(NULL, struct ndr_print); if (!ndr) return; ndr->print = ndr_print_debug_helper; ndr->depth = 1; ndr->flags = 0; fn(ndr, name, flags, ptr); talloc_free(ndr); } /* a useful helper function for printing idl structures to a string */ _PUBLIC_ char *ndr_print_struct_string(TALLOC_CTX *mem_ctx, ndr_print_fn_t fn, const char *name, void *ptr) { struct ndr_print *ndr; char *ret = NULL; ndr = talloc_zero(mem_ctx, struct ndr_print); if (!ndr) return NULL; ndr->private_data = talloc_strdup(ndr, ""); if (!ndr->private_data) { goto failed; } ndr->print = ndr_print_string_helper; ndr->depth = 1; ndr->flags = 0; fn(ndr, name, ptr); ret = talloc_steal(mem_ctx, ndr->private_data); failed: talloc_free(ndr); return ret; } /* a useful helper function for printing idl unions to a string */ _PUBLIC_ char *ndr_print_union_string(TALLOC_CTX *mem_ctx, ndr_print_fn_t fn, const char *name, uint32_t level, void *ptr) { struct ndr_print *ndr; char *ret = NULL; ndr = talloc_zero(mem_ctx, struct ndr_print); if (!ndr) return NULL; ndr->private_data = talloc_strdup(ndr, ""); if (!ndr->private_data) { goto failed; } ndr->print = ndr_print_string_helper; ndr->depth = 1; ndr->flags = 0; ndr_print_set_switch_value(ndr, ptr, level); fn(ndr, name, ptr); ret = talloc_steal(mem_ctx, ndr->private_data); failed: talloc_free(ndr); return ret; } /* a useful helper function for printing idl function calls to a string */ _PUBLIC_ char *ndr_print_function_string(TALLOC_CTX *mem_ctx, ndr_print_function_t fn, const char *name, int flags, void *ptr) { struct ndr_print *ndr; char *ret = NULL; ndr = talloc_zero(mem_ctx, struct ndr_print); if (!ndr) return NULL; ndr->private_data = talloc_strdup(ndr, ""); if (!ndr->private_data) { goto failed; } ndr->print = ndr_print_string_helper; ndr->depth = 1; ndr->flags = 0; fn(ndr, name, flags, ptr); ret = talloc_steal(mem_ctx, ndr->private_data); failed: talloc_free(ndr); return ret; } _PUBLIC_ void ndr_set_flags(uint32_t *pflags, uint32_t new_flags) { /* the big/little endian flags are inter-dependent */ if (new_flags & LIBNDR_FLAG_LITTLE_ENDIAN) { (*pflags) &= ~LIBNDR_FLAG_BIGENDIAN; } if (new_flags & LIBNDR_FLAG_BIGENDIAN) { (*pflags) &= ~LIBNDR_FLAG_LITTLE_ENDIAN; } if (new_flags & LIBNDR_FLAG_REMAINING) { (*pflags) &= ~LIBNDR_ALIGN_FLAGS; } if (new_flags & LIBNDR_ALIGN_FLAGS) { (*pflags) &= ~LIBNDR_FLAG_REMAINING; } (*pflags) |= new_flags; } static NTSTATUS ndr_map_error(enum ndr_err_code ndr_err) { switch (ndr_err) { case NDR_ERR_BUFSIZE: return NT_STATUS_BUFFER_TOO_SMALL; case NDR_ERR_TOKEN: return NT_STATUS_INTERNAL_ERROR; case NDR_ERR_ALLOC: return NT_STATUS_NO_MEMORY; case NDR_ERR_ARRAY_SIZE: return NT_STATUS_ARRAY_BOUNDS_EXCEEDED; default: break; } /* we should map all error codes to different status codes */ return NT_STATUS_INVALID_PARAMETER; } /* return and possibly log an NDR error */ _PUBLIC_ NTSTATUS ndr_pull_error(struct ndr_pull *ndr, enum ndr_err_code ndr_err, const char *format, ...) _PRINTF_ATTRIBUTE(3,4) { char *s=NULL; va_list ap; va_start(ap, format); vasprintf(&s, format, ap); va_end(ap); DEBUG(3,("ndr_pull_error(%u): %s\n", ndr_err, s)); free(s); return ndr_map_error(ndr_err); } /* return and possibly log an NDR error */ _PUBLIC_ NTSTATUS ndr_push_error(struct ndr_push *ndr, enum ndr_err_code ndr_err, const char *format, ...) _PRINTF_ATTRIBUTE(3,4) { char *s=NULL; va_list ap; va_start(ap, format); vasprintf(&s, format, ap); va_end(ap); DEBUG(3,("ndr_push_error(%u): %s\n", ndr_err, s)); free(s); return ndr_map_error(ndr_err); } /* handle subcontext buffers, which in midl land are user-marshalled, but we use magic in pidl to make them easier to cope with */ _PUBLIC_ NTSTATUS ndr_pull_subcontext_start(struct ndr_pull *ndr, struct ndr_pull **_subndr, size_t header_size, ssize_t size_is) { struct ndr_pull *subndr; uint32_t r_content_size; switch (header_size) { case 0: { uint32_t content_size = ndr->data_size - ndr->offset; if (size_is >= 0) { content_size = size_is; } r_content_size = content_size; break; } case 2: { uint16_t content_size; NDR_CHECK(ndr_pull_uint16(ndr, NDR_SCALARS, &content_size)); if (size_is >= 0 && size_is != content_size) { return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT, "Bad subcontext (PULL) size_is(%d) mismatch content_size %d", (int)size_is, (int)content_size); } r_content_size = content_size; break; } case 4: { uint32_t content_size; NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &content_size)); if (size_is >= 0 && size_is != content_size) { return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT, "Bad subcontext (PULL) size_is(%d) mismatch content_size %d", (int)size_is, (int)content_size); } r_content_size = content_size; break; } default: return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT, "Bad subcontext (PULL) header_size %d", (int)header_size); } NDR_PULL_NEED_BYTES(ndr, r_content_size); subndr = talloc_zero(ndr, struct ndr_pull); NT_STATUS_HAVE_NO_MEMORY(subndr); subndr->flags = ndr->flags; subndr->current_mem_ctx = ndr->current_mem_ctx; subndr->data = ndr->data + ndr->offset; subndr->offset = 0; subndr->data_size = r_content_size; *_subndr = subndr; return NT_STATUS_OK; } _PUBLIC_ NTSTATUS ndr_pull_subcontext_end(struct ndr_pull *ndr, struct ndr_pull *subndr, size_t header_size, ssize_t size_is) { uint32_t advance; if (size_is >= 0) { advance = size_is; } else if (header_size > 0) { advance = subndr->data_size; } else { advance = subndr->offset; } NDR_CHECK(ndr_pull_advance(ndr, advance)); return NT_STATUS_OK; } _PUBLIC_ NTSTATUS ndr_push_subcontext_start(struct ndr_push *ndr, struct ndr_push **_subndr, size_t header_size, ssize_t size_is) { struct ndr_push *subndr; subndr = ndr_push_init_ctx(ndr); NT_STATUS_HAVE_NO_MEMORY(subndr); subndr->flags = ndr->flags; *_subndr = subndr; return NT_STATUS_OK; } /* push a subcontext header */ _PUBLIC_ NTSTATUS ndr_push_subcontext_end(struct ndr_push *ndr, struct ndr_push *subndr, size_t header_size, ssize_t size_is) { if (size_is >= 0) { ssize_t padding_len = size_is - subndr->offset; if (padding_len > 0) { NDR_CHECK(ndr_push_zero(subndr, padding_len)); } else if (padding_len < 0) { return ndr_push_error(ndr, NDR_ERR_SUBCONTEXT, "Bad subcontext (PUSH) content_size %d is larger than size_is(%d)", (int)subndr->offset, (int)size_is); } } switch (header_size) { case 0: break; case 2: NDR_CHECK(ndr_push_uint16(ndr, NDR_SCALARS, subndr->offset)); break; case 4: NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, subndr->offset)); break; default: return ndr_push_error(ndr, NDR_ERR_SUBCONTEXT, "Bad subcontext header size %d", (int)header_size); } NDR_CHECK(ndr_push_bytes(ndr, subndr->data, subndr->offset)); return NT_STATUS_OK; } /* store a token in the ndr context, for later retrieval */ _PUBLIC_ NTSTATUS ndr_token_store(TALLOC_CTX *mem_ctx, struct ndr_token_list **list, const void *key, uint32_t value) { struct ndr_token_list *tok; tok = talloc(mem_ctx, struct ndr_token_list); if (tok == NULL) { return NT_STATUS_NO_MEMORY; } tok->key = key; tok->value = value; DLIST_ADD((*list), tok); return NT_STATUS_OK; } /* retrieve a token from a ndr context, using cmp_fn to match the tokens */ _PUBLIC_ NTSTATUS ndr_token_retrieve_cmp_fn(struct ndr_token_list **list, const void *key, uint32_t *v, comparison_fn_t _cmp_fn, BOOL _remove_tok) { struct ndr_token_list *tok; for (tok=*list;tok;tok=tok->next) { if (_cmp_fn && _cmp_fn(tok->key,key)==0) goto found; else if (!_cmp_fn && tok->key == key) goto found; } return ndr_map_error(NDR_ERR_TOKEN); found: *v = tok->value; if (_remove_tok) { DLIST_REMOVE((*list), tok); talloc_free(tok); } return NT_STATUS_OK; } /* retrieve a token from a ndr context */ _PUBLIC_ NTSTATUS ndr_token_retrieve(struct ndr_token_list **list, const void *key, uint32_t *v) { return ndr_token_retrieve_cmp_fn(list, key, v, NULL, True); } /* peek at but don't removed a token from a ndr context */ _PUBLIC_ uint32_t ndr_token_peek(struct ndr_token_list **list, const void *key) { NTSTATUS status; uint32_t v; status = ndr_token_retrieve_cmp_fn(list, key, &v, NULL, False); if (NT_STATUS_IS_OK(status)) return v; return 0; } /* pull an array size field and add it to the array_size_list token list */ _PUBLIC_ NTSTATUS ndr_pull_array_size(struct ndr_pull *ndr, const void *p) { uint32_t size; NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &size)); return ndr_token_store(ndr, &ndr->array_size_list, p, size); } /* get the stored array size field */ _PUBLIC_ uint32_t ndr_get_array_size(struct ndr_pull *ndr, const void *p) { return ndr_token_peek(&ndr->array_size_list, p); } /* check the stored array size field */ _PUBLIC_ NTSTATUS ndr_check_array_size(struct ndr_pull *ndr, void *p, uint32_t size) { uint32_t stored; stored = ndr_token_peek(&ndr->array_size_list, p); if (stored != size) { return ndr_pull_error(ndr, NDR_ERR_ARRAY_SIZE, "Bad array size - got %u expected %u\n", stored, size); } return NT_STATUS_OK; } /* pull an array length field and add it to the array_length_list token list */ _PUBLIC_ NTSTATUS ndr_pull_array_length(struct ndr_pull *ndr, const void *p) { uint32_t length, offset; NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &offset)); if (offset != 0) { return ndr_pull_error(ndr, NDR_ERR_ARRAY_SIZE, "non-zero array offset %u\n", offset); } NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &length)); return ndr_token_store(ndr, &ndr->array_length_list, p, length); } /* get the stored array length field */ _PUBLIC_ uint32_t ndr_get_array_length(struct ndr_pull *ndr, const void *p) { return ndr_token_peek(&ndr->array_length_list, p); } /* check the stored array length field */ _PUBLIC_ NTSTATUS ndr_check_array_length(struct ndr_pull *ndr, void *p, uint32_t length) { uint32_t stored; stored = ndr_token_peek(&ndr->array_length_list, p); if (stored != length) { return ndr_pull_error(ndr, NDR_ERR_ARRAY_SIZE, "Bad array length - got %u expected %u\n", stored, length); } return NT_STATUS_OK; } /* store a switch value */ _PUBLIC_ NTSTATUS ndr_push_set_switch_value(struct ndr_push *ndr, const void *p, uint32_t val) { return ndr_token_store(ndr, &ndr->switch_list, p, val); } _PUBLIC_ NTSTATUS ndr_pull_set_switch_value(struct ndr_pull *ndr, const void *p, uint32_t val) { return ndr_token_store(ndr, &ndr->switch_list, p, val); } _PUBLIC_ NTSTATUS ndr_print_set_switch_value(struct ndr_print *ndr, const void *p, uint32_t val) { return ndr_token_store(ndr, &ndr->switch_list, p, val); } /* retrieve a switch value */ _PUBLIC_ uint32_t ndr_push_get_switch_value(struct ndr_push *ndr, const void *p) { return ndr_token_peek(&ndr->switch_list, p); } _PUBLIC_ uint32_t ndr_pull_get_switch_value(struct ndr_pull *ndr, const void *p) { return ndr_token_peek(&ndr->switch_list, p); } _PUBLIC_ uint32_t ndr_print_get_switch_value(struct ndr_print *ndr, const void *p) { return ndr_token_peek(&ndr->switch_list, p); } /* pull a struct from a blob using NDR */ _PUBLIC_ NTSTATUS ndr_pull_struct_blob(const DATA_BLOB *blob, TALLOC_CTX *mem_ctx, void *p, ndr_pull_flags_fn_t fn) { struct ndr_pull *ndr; ndr = ndr_pull_init_blob(blob, mem_ctx); if (!ndr) { return NT_STATUS_NO_MEMORY; } return fn(ndr, NDR_SCALARS|NDR_BUFFERS, p); } /* pull a struct from a blob using NDR - failing if all bytes are not consumed */ _PUBLIC_ NTSTATUS ndr_pull_struct_blob_all(const DATA_BLOB *blob, TALLOC_CTX *mem_ctx, void *p, ndr_pull_flags_fn_t fn) { struct ndr_pull *ndr; NTSTATUS status; ndr = ndr_pull_init_blob(blob, mem_ctx); if (!ndr) { return NT_STATUS_NO_MEMORY; } status = fn(ndr, NDR_SCALARS|NDR_BUFFERS, p); if (!NT_STATUS_IS_OK(status)) return status; if (ndr->offset != ndr->data_size) { return NT_STATUS_BUFFER_TOO_SMALL; } return status; } /* pull a union from a blob using NDR, given the union discriminator */ _PUBLIC_ NTSTATUS ndr_pull_union_blob(const DATA_BLOB *blob, TALLOC_CTX *mem_ctx, void *p, uint32_t level, ndr_pull_flags_fn_t fn) { struct ndr_pull *ndr; NTSTATUS status; ndr = ndr_pull_init_blob(blob, mem_ctx); if (!ndr) { return NT_STATUS_NO_MEMORY; } ndr_pull_set_switch_value(ndr, p, level); status = fn(ndr, NDR_SCALARS|NDR_BUFFERS, p); if (!NT_STATUS_IS_OK(status)) return status; if (ndr->offset != ndr->data_size) { return NT_STATUS_BUFFER_TOO_SMALL; } return status; } /* push a struct to a blob using NDR */ _PUBLIC_ NTSTATUS ndr_push_struct_blob(DATA_BLOB *blob, TALLOC_CTX *mem_ctx, const void *p, ndr_push_flags_fn_t fn) { NTSTATUS status; struct ndr_push *ndr; ndr = ndr_push_init_ctx(mem_ctx); if (!ndr) { return NT_STATUS_NO_MEMORY; } status = fn(ndr, NDR_SCALARS|NDR_BUFFERS, p); if (!NT_STATUS_IS_OK(status)) { return status; } *blob = ndr_push_blob(ndr); talloc_steal(mem_ctx, blob->data); talloc_free(ndr); return NT_STATUS_OK; } /* push a union to a blob using NDR */ _PUBLIC_ NTSTATUS ndr_push_union_blob(DATA_BLOB *blob, TALLOC_CTX *mem_ctx, void *p, uint32_t level, ndr_push_flags_fn_t fn) { NTSTATUS status; struct ndr_push *ndr; ndr = ndr_push_init_ctx(mem_ctx); if (!ndr) { return NT_STATUS_NO_MEMORY; } ndr_push_set_switch_value(ndr, p, level); status = fn(ndr, NDR_SCALARS|NDR_BUFFERS, p); if (!NT_STATUS_IS_OK(status)) { return status; } *blob = ndr_push_blob(ndr); talloc_steal(mem_ctx, blob->data); talloc_free(ndr); return NT_STATUS_OK; } /* generic ndr_size_*() handler for structures */ _PUBLIC_ size_t ndr_size_struct(const void *p, int flags, ndr_push_flags_fn_t push) { struct ndr_push *ndr; NTSTATUS status; size_t ret; /* avoid recursion */ if (flags & LIBNDR_FLAG_NO_NDR_SIZE) return 0; ndr = ndr_push_init_ctx(NULL); if (!ndr) return 0; ndr->flags |= flags | LIBNDR_FLAG_NO_NDR_SIZE; status = push(ndr, NDR_SCALARS|NDR_BUFFERS, discard_const(p)); if (!NT_STATUS_IS_OK(status)) { return 0; } ret = ndr->offset; talloc_free(ndr); return ret; } /* generic ndr_size_*() handler for unions */ _PUBLIC_ size_t ndr_size_union(const void *p, int flags, uint32_t level, ndr_push_flags_fn_t push) { struct ndr_push *ndr; NTSTATUS status; size_t ret; /* avoid recursion */ if (flags & LIBNDR_FLAG_NO_NDR_SIZE) return 0; ndr = ndr_push_init_ctx(NULL); if (!ndr) return 0; ndr->flags |= flags | LIBNDR_FLAG_NO_NDR_SIZE; ndr_push_set_switch_value(ndr, p, level); status = push(ndr, NDR_SCALARS|NDR_BUFFERS, p); if (!NT_STATUS_IS_OK(status)) { return 0; } ret = ndr->offset; talloc_free(ndr); return ret; } /* get the current base for relative pointers for the push */ _PUBLIC_ uint32_t ndr_push_get_relative_base_offset(struct ndr_push *ndr) { return ndr->relative_base_offset; } /* restore the old base for relative pointers for the push */ _PUBLIC_ void ndr_push_restore_relative_base_offset(struct ndr_push *ndr, uint32_t offset) { ndr->relative_base_offset = offset; } /* setup the current base for relative pointers for the push called in the NDR_SCALAR stage */ _PUBLIC_ NTSTATUS ndr_push_setup_relative_base_offset1(struct ndr_push *ndr, const void *p, uint32_t offset) { ndr->relative_base_offset = offset; return ndr_token_store(ndr, &ndr->relative_base_list, p, offset); } /* setup the current base for relative pointers for the push called in the NDR_BUFFERS stage */ _PUBLIC_ NTSTATUS ndr_push_setup_relative_base_offset2(struct ndr_push *ndr, const void *p) { return ndr_token_retrieve(&ndr->relative_base_list, p, &ndr->relative_base_offset); } /* push a relative object - stage1 this is called during SCALARS processing */ _PUBLIC_ NTSTATUS ndr_push_relative_ptr1(struct ndr_push *ndr, const void *p) { if (p == NULL) { NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, 0)); return NT_STATUS_OK; } NDR_CHECK(ndr_push_align(ndr, 4)); NDR_CHECK(ndr_token_store(ndr, &ndr->relative_list, p, ndr->offset)); return ndr_push_uint32(ndr, NDR_SCALARS, 0xFFFFFFFF); } /* push a relative object - stage2 this is called during buffers processing */ _PUBLIC_ NTSTATUS ndr_push_relative_ptr2(struct ndr_push *ndr, const void *p) { struct ndr_push_save save; uint32_t ptr_offset = 0xFFFFFFFF; if (p == NULL) { return NT_STATUS_OK; } ndr_push_save(ndr, &save); NDR_CHECK(ndr_token_retrieve(&ndr->relative_list, p, &ptr_offset)); if (ptr_offset > ndr->offset) { return ndr_push_error(ndr, NDR_ERR_BUFSIZE, "ndr_push_relative_ptr2 ptr_offset(%u) > ndr->offset(%u)", ptr_offset, ndr->offset); } ndr->offset = ptr_offset; if (save.offset < ndr->relative_base_offset) { return ndr_push_error(ndr, NDR_ERR_BUFSIZE, "ndr_push_relative_ptr2 save.offset(%u) < ndr->relative_base_offset(%u)", save.offset, ndr->relative_base_offset); } NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, save.offset - ndr->relative_base_offset)); ndr_push_restore(ndr, &save); return NT_STATUS_OK; } /* get the current base for relative pointers for the pull */ _PUBLIC_ uint32_t ndr_pull_get_relative_base_offset(struct ndr_pull *ndr) { return ndr->relative_base_offset; } /* restore the old base for relative pointers for the pull */ _PUBLIC_ void ndr_pull_restore_relative_base_offset(struct ndr_pull *ndr, uint32_t offset) { ndr->relative_base_offset = offset; } /* setup the current base for relative pointers for the pull called in the NDR_SCALAR stage */ _PUBLIC_ NTSTATUS ndr_pull_setup_relative_base_offset1(struct ndr_pull *ndr, const void *p, uint32_t offset) { ndr->relative_base_offset = offset; return ndr_token_store(ndr, &ndr->relative_base_list, p, offset); } /* setup the current base for relative pointers for the pull called in the NDR_BUFFERS stage */ _PUBLIC_ NTSTATUS ndr_pull_setup_relative_base_offset2(struct ndr_pull *ndr, const void *p) { return ndr_token_retrieve(&ndr->relative_base_list, p, &ndr->relative_base_offset); } /* pull a relative object - stage1 called during SCALARS processing */ _PUBLIC_ NTSTATUS ndr_pull_relative_ptr1(struct ndr_pull *ndr, const void *p, uint32_t rel_offset) { rel_offset += ndr->relative_base_offset; if (rel_offset > ndr->data_size) { return ndr_pull_error(ndr, NDR_ERR_BUFSIZE, "ndr_pull_relative_ptr1 rel_offset(%u) > ndr->data_size(%u)", rel_offset, ndr->data_size); } return ndr_token_store(ndr, &ndr->relative_list, p, rel_offset); } /* pull a relative object - stage2 called during BUFFERS processing */ _PUBLIC_ NTSTATUS ndr_pull_relative_ptr2(struct ndr_pull *ndr, const void *p) { uint32_t rel_offset; NDR_CHECK(ndr_token_retrieve(&ndr->relative_list, p, &rel_offset)); return ndr_pull_set_offset(ndr, rel_offset); }