a866a75900
This branch adds additional methods to dialplan functions, whereby the result buffers are now dynamic buffers, which can be expanded to the size of any result. No longer are variable substitutions limited to 4095 bytes of data. In addition, the common case of needing buffers much smaller than that will enable substitution to only take up the amount of memory actually needed. The existing variable substitution routines are still available, but users of those API calls should transition to using the dynamic-buffer APIs. Reviewboard: http://reviewboard.digium.com/r/174/ git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@191140 65c4cc65-6c06-0410-ace0-fbb531ad65f3
133 lines
3.5 KiB
C
133 lines
3.5 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 2005 - 2006, Digium, Inc.
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* Copyright (C) 2005, Claude Patry
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*! \file
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*
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* \brief Use the base64 as functions
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*
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* \ingroup functions
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*/
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#include "asterisk.h"
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ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
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#include "asterisk/module.h"
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#include "asterisk/pbx.h" /* function register/unregister */
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#include "asterisk/utils.h"
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#include "asterisk/strings.h"
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/*** DOCUMENTATION
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<function name="BASE64_ENCODE" language="en_US">
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<synopsis>
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Encode a string in base64.
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</synopsis>
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<syntax>
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<parameter name="string" required="true">
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<para>Input string</para>
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</parameter>
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</syntax>
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<description>
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<para>Returns the base64 string.</para>
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</description>
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</function>
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<function name="BASE64_DECODE" language="en_US">
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<synopsis>
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Decode a base64 string.
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</synopsis>
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<syntax>
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<parameter name="string" required="true">
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<para>Input string.</para>
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</parameter>
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</syntax>
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<description>
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<para>Returns the plain text string.</para>
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</description>
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</function>
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***/
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static int base64_helper(struct ast_channel *chan, const char *cmd, char *data,
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char *buf, struct ast_str **str, ssize_t len)
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{
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if (ast_strlen_zero(data)) {
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ast_log(LOG_WARNING, "Syntax: %s(<data>) - missing argument!\n", cmd);
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return -1;
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}
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if (cmd[7] == 'E') {
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if (buf) {
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ast_base64encode(buf, (unsigned char *) data, strlen(data), len);
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} else {
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if (len >= 0) {
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ast_str_make_space(str, len ? len : ast_str_strlen(*str) + strlen(data) * 4 / 3 + 2);
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}
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ast_base64encode(ast_str_buffer(*str) + ast_str_strlen(*str), (unsigned char *) data, strlen(data), ast_str_size(*str) - ast_str_strlen(*str));
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ast_str_update(*str);
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}
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} else {
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if (buf) {
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ast_base64decode((unsigned char *) buf, data, len);
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} else {
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if (len >= 0) {
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ast_str_make_space(str, len ? len : ast_str_strlen(*str) + strlen(data) * 3 / 4 + 2);
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}
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ast_base64decode((unsigned char *) ast_str_buffer(*str) + ast_str_strlen(*str), data, ast_str_size(*str) - ast_str_strlen(*str));
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ast_str_update(*str);
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}
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}
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return 0;
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}
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static int base64_buf_helper(struct ast_channel *chan, const char *cmd, char *data,
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char *buf, size_t len)
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{
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return base64_helper(chan, cmd, data, buf, NULL, len);
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}
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static int base64_str_helper(struct ast_channel *chan, const char *cmd, char *data,
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struct ast_str **buf, ssize_t len)
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{
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return base64_helper(chan, cmd, data, NULL, buf, len);
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}
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static struct ast_custom_function base64_encode_function = {
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.name = "BASE64_ENCODE",
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.read = base64_buf_helper,
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.read2 = base64_str_helper,
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};
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static struct ast_custom_function base64_decode_function = {
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.name = "BASE64_DECODE",
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.read = base64_buf_helper,
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.read2 = base64_str_helper,
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};
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static int unload_module(void)
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{
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return ast_custom_function_unregister(&base64_encode_function) |
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ast_custom_function_unregister(&base64_decode_function);
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}
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static int load_module(void)
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{
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return ast_custom_function_register(&base64_encode_function) |
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ast_custom_function_register(&base64_decode_function);
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}
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AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "base64 encode/decode dialplan functions");
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