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368 lines
10 KiB
368 lines
10 KiB
/* Copyright (C) 2001 by First Peer, Inc. All rights reserved.
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**
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** Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions
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** are met:
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** 1. Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** 2. Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in the
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** documentation and/or other materials provided with the distribution.
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** 3. The name of the author may not be used to endorse or promote products
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** derived from this software without specific prior written permission.
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**
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** THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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** ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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** IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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** ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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** FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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** DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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** OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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** HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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** OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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** SUCH DAMAGE. */
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#include "xmlrpc_config.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <ctype.h>
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#ifdef WIN32
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# define vsnprintf _vsnprintf
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#endif
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#include "xmlrpc.h"
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#include "xmlrpc_int.h"
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#ifdef EFENCE
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/* when looking for corruption don't allocate extra slop */
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#define BLOCK_ALLOC_MIN (1)
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#else
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#define BLOCK_ALLOC_MIN (16)
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#endif
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#define BLOCK_ALLOC_MAX (128 * 1024 * 1024)
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#define ERROR_BUFFER_SZ (256)
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/*=========================================================================
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** Strings
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**=======================================================================*/
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void
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xmlrpc_strfree(const char * const string) {
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free((void*)string);
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}
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/*=========================================================================
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** Assertions and Error Handling
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**=========================================================================
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** Support code for XMLRPC_ASSERT and xmlrpc_env.
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*/
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void xmlrpc_assertion_failed (char* file, int line)
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{
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fprintf(stderr, "%s:%d: assertion failed\n", file, line);
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abort();
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}
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static char* default_fault_string = "Not enough memory for error message";
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void xmlrpc_env_init (xmlrpc_env* env)
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{
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XMLRPC_ASSERT(env != NULL);
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env->fault_occurred = 0;
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env->fault_code = 0;
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env->fault_string = NULL;
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}
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void xmlrpc_env_clean (xmlrpc_env* env)
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{
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XMLRPC_ASSERT(env != NULL);
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/* env->fault_string may be one of three things:
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** 1) a NULL pointer
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** 2) a pointer to the default_fault_string
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** 3) a pointer to a malloc'd fault string
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** If we have case (3), we'll need to free it. */
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if (env->fault_string && env->fault_string != default_fault_string)
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free(env->fault_string);
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env->fault_string = XMLRPC_BAD_POINTER;
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}
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void
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xmlrpc_env_set_fault(xmlrpc_env * const env,
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int const faultCode,
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const char * const faultDescription) {
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XMLRPC_ASSERT(env != NULL);
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XMLRPC_ASSERT(faultDescription != NULL);
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/* Clean up any leftover pointers. */
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xmlrpc_env_clean(env);
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env->fault_occurred = 1;
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env->fault_code = faultCode;
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/* Try to copy the fault string. If this fails, use a default. */
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env->fault_string = (char*) malloc(strlen(faultDescription) + 1);
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if (env->fault_string)
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strcpy(env->fault_string, faultDescription);
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else
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env->fault_string = default_fault_string;
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}
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void
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xmlrpc_env_set_fault_formatted (xmlrpc_env * const envP,
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int const code,
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const char * const format,
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...) {
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va_list args;
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char buffer[ERROR_BUFFER_SZ];
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XMLRPC_ASSERT(envP != NULL);
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XMLRPC_ASSERT(format != NULL);
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/* Print our error message to the buffer. */
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va_start(args, format);
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vsnprintf(buffer, ERROR_BUFFER_SZ, format, args);
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va_end(args);
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/* vsnprintf is guaranteed to terminate the buffer, but we're paranoid. */
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buffer[ERROR_BUFFER_SZ - 1] = '\0';
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/* Set the fault. */
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xmlrpc_env_set_fault(envP, code, buffer);
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}
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void xmlrpc_fatal_error (char* file, int line, char* msg)
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{
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fprintf(stderr, "%s:%d: %s\n", file, line, msg);
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exit(1);
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}
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/*=========================================================================
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** Resource Limits
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**=========================================================================
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*/
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static size_t limits[XMLRPC_LAST_LIMIT_ID + 1] = {
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XMLRPC_NESTING_LIMIT_DEFAULT,
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XMLRPC_XML_SIZE_LIMIT_DEFAULT
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};
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void xmlrpc_limit_set (int limit_id, size_t value)
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{
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XMLRPC_ASSERT(0 <= limit_id && limit_id <= XMLRPC_LAST_LIMIT_ID);
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limits[limit_id] = value;
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}
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size_t xmlrpc_limit_get (int limit_id)
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{
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XMLRPC_ASSERT(0 <= limit_id && limit_id <= XMLRPC_LAST_LIMIT_ID);
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return limits[limit_id];
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}
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/*=========================================================================
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** xmlrpc_mem_block
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**=========================================================================
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** We support resizable blocks of memory. We need these just about
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** everywhere.
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*/
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xmlrpc_mem_block *
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xmlrpc_mem_block_new(xmlrpc_env * const env,
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size_t const size) {
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xmlrpc_mem_block* block;
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XMLRPC_ASSERT_ENV_OK(env);
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block = (xmlrpc_mem_block*) malloc(sizeof(xmlrpc_mem_block));
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XMLRPC_FAIL_IF_NULL(block, env, XMLRPC_INTERNAL_ERROR,
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"Can't allocate memory block");
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xmlrpc_mem_block_init(env, block, size);
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XMLRPC_FAIL_IF_FAULT(env);
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cleanup:
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if (env->fault_occurred) {
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if (block)
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free(block);
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return NULL;
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} else {
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return block;
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}
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}
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/* Destroy an existing xmlrpc_mem_block, and everything it contains. */
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void xmlrpc_mem_block_free (xmlrpc_mem_block* block)
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{
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XMLRPC_ASSERT(block != NULL);
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XMLRPC_ASSERT(block->_block != NULL);
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xmlrpc_mem_block_clean(block);
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free(block);
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}
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/* Initialize the contents of the provided xmlrpc_mem_block. */
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void xmlrpc_mem_block_init (xmlrpc_env* env,
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xmlrpc_mem_block* block,
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size_t size)
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{
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XMLRPC_ASSERT_ENV_OK(env);
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XMLRPC_ASSERT(block != NULL);
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block->_size = size;
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if (size < BLOCK_ALLOC_MIN)
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block->_allocated = BLOCK_ALLOC_MIN;
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else
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block->_allocated = size;
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block->_block = (void*) malloc(block->_allocated);
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if (!block->_block)
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xmlrpc_env_set_fault_formatted(
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env, XMLRPC_INTERNAL_ERROR,
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"Can't allocate %u-byte memory block",
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block->_allocated);
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}
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/* Deallocate the contents of the provided xmlrpc_mem_block, but not the
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** block itself. */
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void xmlrpc_mem_block_clean (xmlrpc_mem_block* block)
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{
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XMLRPC_ASSERT(block != NULL);
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XMLRPC_ASSERT(block->_block != NULL);
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free(block->_block);
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block->_block = XMLRPC_BAD_POINTER;
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}
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/* Get the size of the xmlrpc_mem_block. */
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size_t
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xmlrpc_mem_block_size(const xmlrpc_mem_block * const block) {
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XMLRPC_ASSERT(block != NULL);
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return block->_size;
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}
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/* Get the contents of the xmlrpc_mem_block. */
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void *
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xmlrpc_mem_block_contents(const xmlrpc_mem_block * const block) {
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XMLRPC_ASSERT(block != NULL);
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return block->_block;
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}
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/* Resize an xmlrpc_mem_block, preserving as much of the contents as
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** possible. */
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void
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xmlrpc_mem_block_resize (xmlrpc_env * const env,
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xmlrpc_mem_block * const block,
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size_t const size) {
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size_t proposed_alloc;
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void* new_block;
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XMLRPC_ASSERT_ENV_OK(env);
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XMLRPC_ASSERT(block != NULL);
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/* Check to see if we already have enough space. Maybe we'll get lucky. */
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if (size <= block->_allocated) {
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block->_size = size;
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return;
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}
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/* Calculate a new allocation size. */
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#ifdef EFENCE
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proposed_alloc = size;
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#else
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proposed_alloc = block->_allocated;
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while (proposed_alloc < size && proposed_alloc <= BLOCK_ALLOC_MAX)
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proposed_alloc *= 2;
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#endif /* DEBUG_MEM_ERRORS */
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if (proposed_alloc > BLOCK_ALLOC_MAX)
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XMLRPC_FAIL(env, XMLRPC_INTERNAL_ERROR, "Memory block too large");
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/* Allocate our new memory block. */
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new_block = (void*) malloc(proposed_alloc);
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XMLRPC_FAIL_IF_NULL(new_block, env, XMLRPC_INTERNAL_ERROR,
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"Can't resize memory block");
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/* Copy over our data and update the xmlrpc_mem_block struct. */
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memcpy(new_block, block->_block, block->_size);
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free(block->_block);
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block->_block = new_block;
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block->_size = size;
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block->_allocated = proposed_alloc;
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cleanup:
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return;
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}
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/* Append data to an existing xmlrpc_mem_block. */
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void
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xmlrpc_mem_block_append(xmlrpc_env * const env,
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xmlrpc_mem_block * const block,
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void * const data,
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size_t const len)
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{
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size_t size;
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XMLRPC_ASSERT_ENV_OK(env);
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XMLRPC_ASSERT(block != NULL);
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size = block->_size;
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xmlrpc_mem_block_resize(env, block, size + len);
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XMLRPC_FAIL_IF_FAULT(env);
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memcpy(((unsigned char*) block->_block) + size, data, len);
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cleanup:
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return;
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}
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void
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xmlrpc_traceXml(const char * const label,
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const char * const xml,
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unsigned int const xmlLength) {
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if (getenv("XMLRPC_TRACE_XML")) {
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unsigned int nonPrintableCount;
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unsigned int i;
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nonPrintableCount = 0; /* Initial value */
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for (i = 0; i < xmlLength; ++i) {
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if (!isprint((int)(xml[i])) && xml[i] != '\n' && xml[i] != '\r')
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++nonPrintableCount;
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}
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if (nonPrintableCount > 0)
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fprintf(stderr, "%s contains %u nonprintable characters.\n",
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label, nonPrintableCount);
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fprintf(stderr, "%s:\n %.*s\n", label, (int)xmlLength, xml);
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}
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}
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