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/*
Unix SMB/CIFS implementation.
Manually parsed structures found in DNSP
Copyright (C) Andrew Tridgell 2010
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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "librpc/gen_ndr/ndr_dnsp.h"
/*
print a dnsp_name
*/
_PUBLIC_ void ndr_print_dnsp_name(struct ndr_print *ndr, const char *name,
const char *dns_name)
{
ndr->print(ndr, "%-25s: %s", name, dns_name);
}
/*
pull a dnsp_name
*/
_PUBLIC_ enum ndr_err_code ndr_pull_dnsp_name(struct ndr_pull *ndr, int ndr_flags, const char **name)
{
uint8_t len, count, termination;
int i;
uint32_t total_len, raw_offset;
char *ret;
NDR_CHECK(ndr_pull_uint8(ndr, ndr_flags, &len));
NDR_CHECK(ndr_pull_uint8(ndr, ndr_flags, &count));
raw_offset = ndr->offset;
ret = talloc_strdup(ndr->current_mem_ctx, "");
if (!ret) {
return ndr_pull_error(ndr, NDR_ERR_ALLOC, "Failed to pull dnsp_name");
}
total_len = 1;
for (i=0; i<count; i++) {
uint8_t sublen, newlen;
NDR_CHECK(ndr_pull_uint8(ndr, ndr_flags, &sublen));
newlen = total_len + sublen;
if (newlen < total_len) {
return ndr_pull_error(ndr, NDR_ERR_RANGE,
"Failed to pull dnsp_name");
}
if (i != count-1) {
if (newlen == UINT8_MAX) {
return ndr_pull_error(
ndr, NDR_ERR_RANGE,
"Failed to pull dnsp_name");
}
newlen++; /* for the '.' */
}
ret = talloc_realloc(ndr->current_mem_ctx, ret, char, newlen);
if (!ret) {
return ndr_pull_error(ndr, NDR_ERR_ALLOC, "Failed to pull dnsp_name");
}
NDR_CHECK(ndr_pull_bytes(ndr, (uint8_t *)&ret[total_len-1], sublen));
if (i != count-1) {
ret[newlen-2] = '.';
}
ret[newlen-1] = 0;
total_len = newlen;
}
NDR_CHECK(ndr_pull_uint8(ndr, ndr_flags, &termination));
if (termination != 0) {
return ndr_pull_error(ndr, NDR_ERR_ALLOC, "Failed to pull dnsp_name - not NUL terminated");
}
if (ndr->offset > raw_offset + len) {
return ndr_pull_error(ndr, NDR_ERR_ALLOC, "Failed to pull dnsp_name - overrun by %u bytes",
ndr->offset - (raw_offset + len));
}
/* there could be additional pad bytes */
while (ndr->offset < raw_offset + len) {
uint8_t pad;
NDR_CHECK(ndr_pull_uint8(ndr, ndr_flags, &pad));
}
(*name) = ret;
return NDR_ERR_SUCCESS;
}
enum ndr_err_code ndr_push_dnsp_name(struct ndr_push *ndr, int ndr_flags, const char *name)
{
int count, total_len, i;
/* count the dots */
for (count=i=0; name[i]; i++) {
if (name[i] == '.') count++;
}
total_len = strlen(name) + 1;
/*
* cope with names ending in '.'
*/
if (name[0] == '\0') {
/*
* Don't access name[-1] for the "" input, which has
* the same meaning as a lone '.'.
*
* This allows a round-trip of a dnsRecord from
* Windows of a MX record of '.'
*/
} else if (name[strlen(name)-1] != '.') {
total_len++;
count++;
}
if (total_len > 255 || count > 255) {
return ndr_push_error(ndr, NDR_ERR_BUFSIZE,
"dns_name of length %d larger than 255", total_len);
}
NDR_CHECK(ndr_push_uint8(ndr, ndr_flags, (uint8_t)total_len));
NDR_CHECK(ndr_push_uint8(ndr, ndr_flags, (uint8_t)count));
for (i=0; i<count; i++) {
const char *p = strchr(name, '.');
size_t sublen = p?(p-name):strlen(name);
NDR_CHECK(ndr_push_uint8(ndr, ndr_flags, (uint8_t)sublen));
NDR_CHECK(ndr_push_bytes(ndr, (const uint8_t *)name, sublen));
name += sublen + 1;
}
NDR_CHECK(ndr_push_uint8(ndr, ndr_flags, 0));
return NDR_ERR_SUCCESS;
}
/*
print a dnsp_string
*/
_PUBLIC_ void ndr_print_dnsp_string(struct ndr_print *ndr, const char *name,
const char *dns_string)
{
ndr->print(ndr, "%-25s: %s", name, dns_string);
}
/*
pull a dnsp_string
*/
_PUBLIC_ enum ndr_err_code ndr_pull_dnsp_string(struct ndr_pull *ndr, int ndr_flags, const char **string)
{
uint8_t len;
char *ret;
NDR_CHECK(ndr_pull_uint8(ndr, ndr_flags, &len));
ret = talloc_zero_array(ndr->current_mem_ctx, char, len + 1);
if (!ret) {
return ndr_pull_error(ndr, NDR_ERR_ALLOC, "Failed to pull dnsp_string");
}
NDR_CHECK(ndr_pull_bytes(ndr, (uint8_t *)ret, len));
(*string) = ret;
NDR_PULL_ALIGN(ndr, 1);
return NDR_ERR_SUCCESS;
}
enum ndr_err_code ndr_push_dnsp_string(struct ndr_push *ndr, int ndr_flags, const char *string)
{
int total_len;
total_len = strlen(string);
if (total_len > 255) {
return ndr_push_error(ndr, NDR_ERR_BUFSIZE,
"dns_name of length %d larger than 255", total_len);
}
NDR_CHECK(ndr_push_uint8(ndr, ndr_flags, (uint8_t)total_len));
NDR_CHECK(ndr_push_bytes(ndr, (const uint8_t *)string, total_len));
return NDR_ERR_SUCCESS;
}
/*
* print a dnsp_string_list
*/
_PUBLIC_ void ndr_print_dnsp_string_list(struct ndr_print *ndr, const char *name,
const struct dnsp_string_list *list)
{
uint32_t i;
ndr->no_newline = true;
for (i=0; i<ndr->depth; i++) {
ndr->print(ndr, " ");
}
ndr->print(ndr, "%-25s:", name);
for (i=0; i<list->count; i++) {
ndr->print(ndr, " \"%s\"", list->str[i]);
}
ndr->print(ndr, "\n");
ndr->no_newline = false;
}
/*
* pull a dnsp_string_list
*/
_PUBLIC_ enum ndr_err_code ndr_pull_dnsp_string_list(struct ndr_pull *ndr, int ndr_flags, struct dnsp_string_list *list)
{
list->count = 0;
list->str = talloc_array(ndr->current_mem_ctx, const char *,
list->count);
if (! list->str) {
return ndr_pull_error(ndr, NDR_ERR_ALLOC, "Failed to pull dnsp_string_list");
}
while (ndr->offset < ndr->data_size) {
list->str = talloc_realloc(ndr->current_mem_ctx, list->str,
const char *, list->count+1);
if (! list->str) {
return ndr_pull_error(ndr, NDR_ERR_ALLOC, "Failed to pull dnsp_string_list");
}
NDR_CHECK(ndr_pull_dnsp_string(ndr, ndr_flags, &list->str[list->count]));
list->count++;
}
return NDR_ERR_SUCCESS;
}
enum ndr_err_code ndr_push_dnsp_string_list(struct ndr_push *ndr, int ndr_flags, const struct dnsp_string_list *list)
{
uint8_t i;
for (i=0; i<list->count; i++) {
NDR_CHECK(ndr_push_dnsp_string(ndr, ndr_flags, list->str[i]));
}
return NDR_ERR_SUCCESS;
}
enum ndr_err_code ndr_dnsp_string_list_copy(TALLOC_CTX *mem_ctx,
const struct dnsp_string_list *src,
struct dnsp_string_list *dst)
{
size_t i;
dst->count = 0;
dst->str = talloc_zero_array(mem_ctx, const char *, src->count);
if (dst->str == NULL) {
return NDR_ERR_ALLOC;
}
for (i = 0; i < src->count; i++) {
dst->str[i] = talloc_strdup(dst->str, src->str[i]);
if (dst->str[i] == NULL) {
TALLOC_FREE(dst->str);
return NDR_ERR_ALLOC;
}
}
dst->count = src->count;
return NDR_ERR_SUCCESS;
}
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