364 lines
10 KiB
C
364 lines
10 KiB
C
/* Copyright (C) 2001 by First Peer, Inc. All rights reserved.
|
|
**
|
|
** Redistribution and use in source and binary forms, with or without
|
|
** modification, are permitted provided that the following conditions
|
|
** are met:
|
|
** 1. Redistributions of source code must retain the above copyright
|
|
** notice, this list of conditions and the following disclaimer.
|
|
** 2. Redistributions in binary form must reproduce the above copyright
|
|
** notice, this list of conditions and the following disclaimer in the
|
|
** documentation and/or other materials provided with the distribution.
|
|
** 3. The name of the author may not be used to endorse or promote products
|
|
** derived from this software without specific prior written permission.
|
|
**
|
|
** THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
** ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
** IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
** ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
** FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
** DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
** OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
** HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
** OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
** SUCH DAMAGE. */
|
|
|
|
#include "xmlrpc_config.h"
|
|
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <ctype.h>
|
|
|
|
#include "xmlrpc.h"
|
|
#include "xmlrpc_int.h"
|
|
|
|
#ifdef EFENCE
|
|
/* when looking for corruption don't allocate extra slop */
|
|
#define BLOCK_ALLOC_MIN (1)
|
|
#else
|
|
#define BLOCK_ALLOC_MIN (16)
|
|
#endif
|
|
#define BLOCK_ALLOC_MAX (128 * 1024 * 1024)
|
|
|
|
#define ERROR_BUFFER_SZ (256)
|
|
|
|
|
|
/*=========================================================================
|
|
** Strings
|
|
**=======================================================================*/
|
|
|
|
void
|
|
xmlrpc_strfree(const char * const string) {
|
|
free((void*)string);
|
|
}
|
|
|
|
|
|
/*=========================================================================
|
|
** Assertions and Error Handling
|
|
**=========================================================================
|
|
** Support code for XMLRPC_ASSERT and xmlrpc_env.
|
|
*/
|
|
|
|
void xmlrpc_assertion_failed (char* file, int line)
|
|
{
|
|
fprintf(stderr, "%s:%d: assertion failed\n", file, line);
|
|
abort();
|
|
}
|
|
|
|
static char* default_fault_string = "Not enough memory for error message";
|
|
|
|
void xmlrpc_env_init (xmlrpc_env* env)
|
|
{
|
|
XMLRPC_ASSERT(env != NULL);
|
|
|
|
env->fault_occurred = 0;
|
|
env->fault_code = 0;
|
|
env->fault_string = NULL;
|
|
}
|
|
|
|
void xmlrpc_env_clean (xmlrpc_env* env)
|
|
{
|
|
XMLRPC_ASSERT(env != NULL);
|
|
|
|
/* env->fault_string may be one of three things:
|
|
** 1) a NULL pointer
|
|
** 2) a pointer to the default_fault_string
|
|
** 3) a pointer to a malloc'd fault string
|
|
** If we have case (3), we'll need to free it. */
|
|
if (env->fault_string && env->fault_string != default_fault_string)
|
|
free(env->fault_string);
|
|
env->fault_string = XMLRPC_BAD_POINTER;
|
|
}
|
|
|
|
|
|
|
|
void
|
|
xmlrpc_env_set_fault(xmlrpc_env * const env,
|
|
int const faultCode,
|
|
const char * const faultDescription) {
|
|
|
|
XMLRPC_ASSERT(env != NULL);
|
|
XMLRPC_ASSERT(faultDescription != NULL);
|
|
|
|
/* Clean up any leftover pointers. */
|
|
xmlrpc_env_clean(env);
|
|
|
|
env->fault_occurred = 1;
|
|
env->fault_code = faultCode;
|
|
|
|
/* Try to copy the fault string. If this fails, use a default. */
|
|
env->fault_string = (char*) malloc(strlen(faultDescription) + 1);
|
|
if (env->fault_string)
|
|
strcpy(env->fault_string, faultDescription);
|
|
else
|
|
env->fault_string = default_fault_string;
|
|
}
|
|
|
|
|
|
|
|
void
|
|
xmlrpc_env_set_fault_formatted (xmlrpc_env * const envP,
|
|
int const code,
|
|
const char * const format,
|
|
...) {
|
|
va_list args;
|
|
char buffer[ERROR_BUFFER_SZ];
|
|
|
|
XMLRPC_ASSERT(envP != NULL);
|
|
XMLRPC_ASSERT(format != NULL);
|
|
|
|
/* Print our error message to the buffer. */
|
|
va_start(args, format);
|
|
vsnprintf(buffer, ERROR_BUFFER_SZ, format, args);
|
|
va_end(args);
|
|
|
|
/* vsnprintf is guaranteed to terminate the buffer, but we're paranoid. */
|
|
buffer[ERROR_BUFFER_SZ - 1] = '\0';
|
|
|
|
/* Set the fault. */
|
|
xmlrpc_env_set_fault(envP, code, buffer);
|
|
}
|
|
|
|
|
|
|
|
void xmlrpc_fatal_error (char* file, int line, char* msg)
|
|
{
|
|
fprintf(stderr, "%s:%d: %s\n", file, line, msg);
|
|
exit(1);
|
|
}
|
|
|
|
|
|
/*=========================================================================
|
|
** Resource Limits
|
|
**=========================================================================
|
|
*/
|
|
|
|
static size_t limits[XMLRPC_LAST_LIMIT_ID + 1] = {
|
|
XMLRPC_NESTING_LIMIT_DEFAULT,
|
|
XMLRPC_XML_SIZE_LIMIT_DEFAULT
|
|
};
|
|
|
|
void xmlrpc_limit_set (int limit_id, size_t value)
|
|
{
|
|
XMLRPC_ASSERT(0 <= limit_id && limit_id <= XMLRPC_LAST_LIMIT_ID);
|
|
limits[limit_id] = value;
|
|
}
|
|
|
|
size_t xmlrpc_limit_get (int limit_id)
|
|
{
|
|
XMLRPC_ASSERT(0 <= limit_id && limit_id <= XMLRPC_LAST_LIMIT_ID);
|
|
return limits[limit_id];
|
|
}
|
|
|
|
|
|
/*=========================================================================
|
|
** xmlrpc_mem_block
|
|
**=========================================================================
|
|
** We support resizable blocks of memory. We need these just about
|
|
** everywhere.
|
|
*/
|
|
|
|
xmlrpc_mem_block *
|
|
xmlrpc_mem_block_new(xmlrpc_env * const env,
|
|
size_t const size) {
|
|
xmlrpc_mem_block* block;
|
|
|
|
XMLRPC_ASSERT_ENV_OK(env);
|
|
|
|
block = (xmlrpc_mem_block*) malloc(sizeof(xmlrpc_mem_block));
|
|
XMLRPC_FAIL_IF_NULL(block, env, XMLRPC_INTERNAL_ERROR,
|
|
"Can't allocate memory block");
|
|
|
|
xmlrpc_mem_block_init(env, block, size);
|
|
XMLRPC_FAIL_IF_FAULT(env);
|
|
|
|
cleanup:
|
|
if (env->fault_occurred) {
|
|
if (block)
|
|
free(block);
|
|
return NULL;
|
|
} else {
|
|
return block;
|
|
}
|
|
}
|
|
|
|
/* Destroy an existing xmlrpc_mem_block, and everything it contains. */
|
|
void xmlrpc_mem_block_free (xmlrpc_mem_block* block)
|
|
{
|
|
XMLRPC_ASSERT(block != NULL);
|
|
XMLRPC_ASSERT(block->_block != NULL);
|
|
|
|
xmlrpc_mem_block_clean(block);
|
|
free(block);
|
|
}
|
|
|
|
/* Initialize the contents of the provided xmlrpc_mem_block. */
|
|
void xmlrpc_mem_block_init (xmlrpc_env* env,
|
|
xmlrpc_mem_block* block,
|
|
size_t size)
|
|
{
|
|
XMLRPC_ASSERT_ENV_OK(env);
|
|
XMLRPC_ASSERT(block != NULL);
|
|
|
|
block->_size = size;
|
|
if (size < BLOCK_ALLOC_MIN)
|
|
block->_allocated = BLOCK_ALLOC_MIN;
|
|
else
|
|
block->_allocated = size;
|
|
|
|
block->_block = (void*) malloc(block->_allocated);
|
|
if (!block->_block)
|
|
xmlrpc_env_set_fault_formatted(
|
|
env, XMLRPC_INTERNAL_ERROR,
|
|
"Can't allocate %u-byte memory block",
|
|
block->_allocated);
|
|
}
|
|
|
|
/* Deallocate the contents of the provided xmlrpc_mem_block, but not the
|
|
** block itself. */
|
|
void xmlrpc_mem_block_clean (xmlrpc_mem_block* block)
|
|
{
|
|
XMLRPC_ASSERT(block != NULL);
|
|
XMLRPC_ASSERT(block->_block != NULL);
|
|
|
|
free(block->_block);
|
|
block->_block = XMLRPC_BAD_POINTER;
|
|
}
|
|
|
|
|
|
|
|
/* Get the size of the xmlrpc_mem_block. */
|
|
size_t
|
|
xmlrpc_mem_block_size(const xmlrpc_mem_block * const block) {
|
|
|
|
XMLRPC_ASSERT(block != NULL);
|
|
return block->_size;
|
|
}
|
|
|
|
|
|
|
|
/* Get the contents of the xmlrpc_mem_block. */
|
|
void *
|
|
xmlrpc_mem_block_contents(const xmlrpc_mem_block * const block) {
|
|
|
|
XMLRPC_ASSERT(block != NULL);
|
|
return block->_block;
|
|
}
|
|
|
|
|
|
|
|
/* Resize an xmlrpc_mem_block, preserving as much of the contents as
|
|
** possible. */
|
|
void
|
|
xmlrpc_mem_block_resize (xmlrpc_env * const env,
|
|
xmlrpc_mem_block * const block,
|
|
size_t const size) {
|
|
|
|
size_t proposed_alloc;
|
|
void* new_block;
|
|
|
|
XMLRPC_ASSERT_ENV_OK(env);
|
|
XMLRPC_ASSERT(block != NULL);
|
|
|
|
/* Check to see if we already have enough space. Maybe we'll get lucky. */
|
|
if (size <= block->_allocated) {
|
|
block->_size = size;
|
|
return;
|
|
}
|
|
|
|
/* Calculate a new allocation size. */
|
|
#ifdef EFENCE
|
|
proposed_alloc = size;
|
|
#else
|
|
proposed_alloc = block->_allocated;
|
|
while (proposed_alloc < size && proposed_alloc <= BLOCK_ALLOC_MAX)
|
|
proposed_alloc *= 2;
|
|
#endif /* DEBUG_MEM_ERRORS */
|
|
|
|
if (proposed_alloc > BLOCK_ALLOC_MAX)
|
|
XMLRPC_FAIL(env, XMLRPC_INTERNAL_ERROR, "Memory block too large");
|
|
|
|
/* Allocate our new memory block. */
|
|
new_block = (void*) malloc(proposed_alloc);
|
|
XMLRPC_FAIL_IF_NULL(new_block, env, XMLRPC_INTERNAL_ERROR,
|
|
"Can't resize memory block");
|
|
|
|
/* Copy over our data and update the xmlrpc_mem_block struct. */
|
|
memcpy(new_block, block->_block, block->_size);
|
|
free(block->_block);
|
|
block->_block = new_block;
|
|
block->_size = size;
|
|
block->_allocated = proposed_alloc;
|
|
|
|
cleanup:
|
|
return;
|
|
}
|
|
|
|
/* Append data to an existing xmlrpc_mem_block. */
|
|
void
|
|
xmlrpc_mem_block_append(xmlrpc_env * const env,
|
|
xmlrpc_mem_block * const block,
|
|
void * const data,
|
|
size_t const len)
|
|
{
|
|
int size;
|
|
|
|
XMLRPC_ASSERT_ENV_OK(env);
|
|
XMLRPC_ASSERT(block != NULL);
|
|
|
|
size = block->_size;
|
|
xmlrpc_mem_block_resize(env, block, size + len);
|
|
XMLRPC_FAIL_IF_FAULT(env);
|
|
|
|
memcpy(((unsigned char*) block->_block) + size, data, len);
|
|
|
|
cleanup:
|
|
return;
|
|
}
|
|
|
|
|
|
|
|
void
|
|
xmlrpc_traceXml(const char * const label,
|
|
const char * const xml,
|
|
unsigned int const xmlLength) {
|
|
|
|
if (getenv("XMLRPC_TRACE_XML")) {
|
|
unsigned int nonPrintableCount;
|
|
unsigned int i;
|
|
|
|
nonPrintableCount = 0; /* Initial value */
|
|
|
|
for (i = 0; i < xmlLength; ++i) {
|
|
if (!isprint(xml[i]) && xml[i] != '\n' && xml[i] != '\r')
|
|
++nonPrintableCount;
|
|
}
|
|
if (nonPrintableCount > 0)
|
|
fprintf(stderr, "%s contains %u nonprintable characters.\n",
|
|
label, nonPrintableCount);
|
|
|
|
fprintf(stderr, "%s:\n %.*s\n", label, (int)xmlLength, xml);
|
|
}
|
|
}
|