PAL.C.T MINI SHELL
/*
+----------------------------------------------------------------------+
| PHP Version 7 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2015 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Author: Zeev Suraski <zeev@zend.com> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#include "php.h"
#include "php_browscap.h"
#include "php_ini.h"
#include "php_string.h"
#include "ext/pcre/php_pcre.h"
#include "zend_ini_scanner.h"
#include "zend_globals.h"
typedef struct {
HashTable *htab;
zval current_section;
char *current_section_name;
char filename[MAXPATHLEN];
} browser_data;
/* browser data defined in startup phase, eagerly loaded in MINIT */
static browser_data global_bdata = {0};
/* browser data defined in activation phase, lazily loaded in get_browser.
* Per request and per thread, if applicable */
ZEND_BEGIN_MODULE_GLOBALS(browscap)
browser_data activation_bdata;
ZEND_END_MODULE_GLOBALS(browscap)
ZEND_DECLARE_MODULE_GLOBALS(browscap)
#define BROWSCAP_G(v) ZEND_MODULE_GLOBALS_ACCESSOR(browscap, v)
#define DEFAULT_SECTION_NAME "Default Browser Capability Settings"
/* OBJECTS_FIXME: This whole extension needs going through. The use of objects looks pretty broken here */
static void browscap_entry_dtor_request(zval *zvalue) /* {{{ */
{
if (Z_TYPE_P(zvalue) == IS_ARRAY) {
zend_hash_destroy(Z_ARRVAL_P(zvalue));
efree(Z_ARR_P(zvalue));
} else if (Z_TYPE_P(zvalue) == IS_STRING) {
zend_string_release(Z_STR_P(zvalue));
}
}
/* }}} */
static void browscap_entry_dtor_persistent(zval *zvalue) /* {{{ */ {
if (Z_TYPE_P(zvalue) == IS_ARRAY) {
zend_hash_destroy(Z_ARRVAL_P(zvalue));
free(Z_ARR_P(zvalue));
} else if (Z_TYPE_P(zvalue) == IS_STRING) {
zend_string_release(Z_STR_P(zvalue));
}
}
/* }}} */
static void convert_browscap_pattern(zval *pattern, int persistent) /* {{{ */
{
int i, j=0;
char *t;
zend_string *res;
char *lc_pattern;
res = zend_string_safe_alloc(Z_STRLEN_P(pattern), 2, 4, persistent);
t = ZSTR_VAL(res);
lc_pattern = zend_str_tolower_dup(Z_STRVAL_P(pattern), Z_STRLEN_P(pattern));
t[j++] = '~';
t[j++] = '^';
for (i=0; i<Z_STRLEN_P(pattern); i++, j++) {
switch (lc_pattern[i]) {
case '?':
t[j] = '.';
break;
case '*':
t[j++] = '.';
t[j] = '*';
break;
case '.':
t[j++] = '\\';
t[j] = '.';
break;
case '\\':
t[j++] = '\\';
t[j] = '\\';
break;
case '(':
t[j++] = '\\';
t[j] = '(';
break;
case ')':
t[j++] = '\\';
t[j] = ')';
break;
case '~':
t[j++] = '\\';
t[j] = '~';
break;
default:
t[j] = lc_pattern[i];
break;
}
}
t[j++] = '$';
t[j++] = '~';
t[j]=0;
ZSTR_LEN(res) = j;
Z_STR_P(pattern) = res;
efree(lc_pattern);
}
/* }}} */
static void php_browscap_parser_cb(zval *arg1, zval *arg2, zval *arg3, int callback_type, void *arg) /* {{{ */
{
browser_data *bdata = arg;
int persistent = bdata->htab->u.flags & HASH_FLAG_PERSISTENT;
if (!arg1) {
return;
}
switch (callback_type) {
case ZEND_INI_PARSER_ENTRY:
if (Z_TYPE(bdata->current_section) != IS_UNDEF && arg2) {
zval new_property;
zend_string *new_key;
/* parent entry can not be same as current section -> causes infinite loop! */
if (!strcasecmp(Z_STRVAL_P(arg1), "parent") &&
bdata->current_section_name != NULL &&
!strcasecmp(bdata->current_section_name, Z_STRVAL_P(arg2))
) {
zend_error(E_CORE_ERROR, "Invalid browscap ini file: "
"'Parent' value cannot be same as the section name: %s "
"(in file %s)", bdata->current_section_name, INI_STR("browscap"));
return;
}
/* Set proper value for true/false settings */
if ((Z_STRLEN_P(arg2) == 2 && !strncasecmp(Z_STRVAL_P(arg2), "on", sizeof("on") - 1)) ||
(Z_STRLEN_P(arg2) == 3 && !strncasecmp(Z_STRVAL_P(arg2), "yes", sizeof("yes") - 1)) ||
(Z_STRLEN_P(arg2) == 4 && !strncasecmp(Z_STRVAL_P(arg2), "true", sizeof("true") - 1))
) {
ZVAL_NEW_STR(&new_property, zend_string_init("1", sizeof("1")-1, persistent));
} else if (
(Z_STRLEN_P(arg2) == 2 && !strncasecmp(Z_STRVAL_P(arg2), "no", sizeof("no") - 1)) ||
(Z_STRLEN_P(arg2) == 3 && !strncasecmp(Z_STRVAL_P(arg2), "off", sizeof("off") - 1)) ||
(Z_STRLEN_P(arg2) == 4 && !strncasecmp(Z_STRVAL_P(arg2), "none", sizeof("none") - 1)) ||
(Z_STRLEN_P(arg2) == 5 && !strncasecmp(Z_STRVAL_P(arg2), "false", sizeof("false") - 1))
) {
// TODO: USE ZSTR_EMPTY_ALLOC()?
ZVAL_NEW_STR(&new_property, zend_string_init("", sizeof("")-1, persistent));
} else { /* Other than true/false setting */
ZVAL_STR(&new_property, zend_string_dup(Z_STR_P(arg2), persistent));
}
new_key = zend_string_dup(Z_STR_P(arg1), persistent);
zend_str_tolower(ZSTR_VAL(new_key), ZSTR_LEN(new_key));
zend_hash_update(Z_ARRVAL(bdata->current_section), new_key, &new_property);
zend_string_release(new_key);
}
break;
case ZEND_INI_PARSER_SECTION: {
zval processed;
zval unprocessed;
/*printf("'%s' (%d)\n",$1.value.str.val,$1.value.str.len + 1);*/
if (persistent) {
ZVAL_NEW_PERSISTENT_ARR(&bdata->current_section);
} else {
ZVAL_NEW_ARR(&bdata->current_section);
}
zend_hash_init(Z_ARRVAL(bdata->current_section), 0, NULL,
(dtor_func_t) (persistent?browscap_entry_dtor_persistent
:browscap_entry_dtor_request),
persistent);
if (bdata->current_section_name) {
pefree(bdata->current_section_name, persistent);
}
bdata->current_section_name = pestrndup(Z_STRVAL_P(arg1),
Z_STRLEN_P(arg1), persistent);
zend_hash_update(bdata->htab, Z_STR_P(arg1), &bdata->current_section);
ZVAL_STR(&processed, Z_STR_P(arg1));
ZVAL_STR(&unprocessed, zend_string_dup(Z_STR_P(arg1), persistent));
convert_browscap_pattern(&processed, persistent);
zend_hash_str_update(Z_ARRVAL(bdata->current_section), "browser_name_regex", sizeof("browser_name_regex")-1, &processed);
zend_hash_str_update(Z_ARRVAL(bdata->current_section), "browser_name_pattern", sizeof("browser_name_pattern")-1, &unprocessed);
}
break;
}
}
/* }}} */
static int browscap_read_file(char *filename, browser_data *browdata, int persistent) /* {{{ */
{
zend_file_handle fh = {{0}};
if (filename == NULL || filename[0] == '\0') {
return FAILURE;
}
browdata->htab = pemalloc(sizeof *browdata->htab, persistent);
if (browdata->htab == NULL) {
return FAILURE;
}
zend_hash_init_ex(browdata->htab, 0, NULL,
(dtor_func_t) (persistent?browscap_entry_dtor_persistent
:browscap_entry_dtor_request),
persistent, 0);
fh.handle.fp = VCWD_FOPEN(filename, "r");
fh.opened_path = NULL;
fh.free_filename = 0;
if (!fh.handle.fp) {
zend_hash_destroy(browdata->htab);
pefree(browdata->htab, persistent);
browdata->htab = NULL;
zend_error(E_CORE_WARNING, "Cannot open '%s' for reading", filename);
return FAILURE;
}
fh.filename = filename;
fh.type = ZEND_HANDLE_FP;
browdata->current_section_name = NULL;
zend_parse_ini_file(&fh, 1, ZEND_INI_SCANNER_RAW,
(zend_ini_parser_cb_t) php_browscap_parser_cb, browdata);
if (browdata->current_section_name != NULL) {
pefree(browdata->current_section_name, persistent);
browdata->current_section_name = NULL;
}
return SUCCESS;
}
/* }}} */
#ifdef ZTS
static void browscap_globals_ctor(zend_browscap_globals *browscap_globals) /* {{{ */
{
browscap_globals->activation_bdata.htab = NULL;
ZVAL_UNDEF(&browscap_globals->activation_bdata.current_section);
browscap_globals->activation_bdata.current_section_name = NULL;
browscap_globals->activation_bdata.filename[0] = '\0';
}
/* }}} */
#endif
static void browscap_bdata_dtor(browser_data *bdata, int persistent) /* {{{ */
{
if (bdata->htab != NULL) {
zend_hash_destroy(bdata->htab);
pefree(bdata->htab, persistent);
bdata->htab = NULL;
}
bdata->filename[0] = '\0';
/* current_section_* are only used during parsing */
}
/* }}} */
/* {{{ PHP_INI_MH
*/
PHP_INI_MH(OnChangeBrowscap)
{
if (stage == PHP_INI_STAGE_STARTUP) {
/* value handled in browscap.c's MINIT */
return SUCCESS;
} else if (stage == PHP_INI_STAGE_ACTIVATE) {
browser_data *bdata = &BROWSCAP_G(activation_bdata);
if (bdata->filename[0] != '\0') {
browscap_bdata_dtor(bdata, 0);
}
if (VCWD_REALPATH(ZSTR_VAL(new_value), bdata->filename) == NULL) {
return FAILURE;
}
return SUCCESS;
}
return FAILURE;
}
/* }}} */
PHP_MINIT_FUNCTION(browscap) /* {{{ */
{
char *browscap = INI_STR("browscap");
#ifdef ZTS
ts_allocate_id(&browscap_globals_id, sizeof(browser_data), (ts_allocate_ctor) browscap_globals_ctor, NULL);
#endif
/* ctor call not really needed for non-ZTS */
if (browscap && browscap[0]) {
if (browscap_read_file(browscap, &global_bdata, 1) == FAILURE) {
return FAILURE;
}
}
return SUCCESS;
}
/* }}} */
PHP_RSHUTDOWN_FUNCTION(browscap) /* {{{ */
{
browser_data *bdata = &BROWSCAP_G(activation_bdata);
if (bdata->filename[0] != '\0') {
browscap_bdata_dtor(bdata, 0);
}
return SUCCESS;
}
/* }}} */
PHP_MSHUTDOWN_FUNCTION(browscap) /* {{{ */
{
browscap_bdata_dtor(&global_bdata, 1);
return SUCCESS;
}
/* }}} */
static int browser_reg_compare(zval *browser, int num_args, va_list args, zend_hash_key *key) /* {{{ */
{
zval *browser_regex, *previous_match;
pcre *re;
int re_options;
pcre_extra *re_extra;
char *lookup_browser_name = va_arg(args, char *);
int lookup_browser_length = va_arg(args, int);
zval *found_browser_entry = va_arg(args, zval *);
/* See if we have an exact match, if so, we're done... */
if (Z_TYPE_P(found_browser_entry) == IS_ARRAY) {
if ((previous_match = zend_hash_str_find(Z_ARRVAL_P(found_browser_entry), "browser_name_pattern", sizeof("browser_name_pattern")-1)) == NULL) {
return 0;
}
else if (!strcasecmp(Z_STRVAL_P(previous_match), lookup_browser_name)) {
return 0;
}
}
if ((browser_regex = zend_hash_str_find(Z_ARRVAL_P(browser), "browser_name_regex", sizeof("browser_name_regex")-1)) == NULL) {
return 0;
}
re = pcre_get_compiled_regex(Z_STR_P(browser_regex), &re_extra, &re_options);
if (re == NULL) {
return 0;
}
if (pcre_exec(re, re_extra, lookup_browser_name, lookup_browser_length, 0, re_options, NULL, 0) == 0) {
/* If we've found a possible browser, we need to do a comparison of the
number of characters changed in the user agent being checked versus
the previous match found and the current match. */
if (Z_TYPE_P(found_browser_entry) == IS_ARRAY) {
size_t i, prev_len = 0, curr_len = 0;
zval *current_match = zend_hash_str_find(Z_ARRVAL_P(browser), "browser_name_pattern", sizeof("browser_name_pattern")-1);
if (!current_match) {
return 0;
}
for (i = 0; i < Z_STRLEN_P(previous_match); i++) {
switch (Z_STRVAL_P(previous_match)[i]) {
case '?':
case '*':
/* do nothing, ignore these characters in the count */
break;
default:
++prev_len;
}
}
for (i = 0; i < Z_STRLEN_P(current_match); i++) {
switch (Z_STRVAL_P(current_match)[i]) {
case '?':
case '*':
/* do nothing, ignore these characters in the count */
break;
default:
++curr_len;
}
}
/* Pick which browser pattern replaces the least amount of
characters when compared to the original user agent string... */
if (prev_len < curr_len) {
ZVAL_COPY_VALUE(found_browser_entry, browser);
}
}
else {
ZVAL_COPY_VALUE(found_browser_entry, browser);
}
}
return 0;
}
/* }}} */
static void browscap_zval_copy_ctor(zval *p) /* {{{ */
{
zval_copy_ctor(p);
}
/* }}} */
/* {{{ proto mixed get_browser([string browser_name [, bool return_array]])
Get information about the capabilities of a browser. If browser_name is omitted or null, HTTP_USER_AGENT is used. Returns an object by default; if return_array is true, returns an array. */
PHP_FUNCTION(get_browser)
{
char *agent_name = NULL;
size_t agent_name_len = 0;
zend_bool return_array = 0;
zval *agent, *z_agent_name, *http_user_agent;
zval found_browser_entry;
char *lookup_browser_name;
browser_data *bdata;
if (BROWSCAP_G(activation_bdata).filename[0] != '\0') {
bdata = &BROWSCAP_G(activation_bdata);
if (bdata->htab == NULL) { /* not initialized yet */
if (browscap_read_file(bdata->filename, bdata, 0) == FAILURE) {
RETURN_FALSE;
}
}
} else {
if (!global_bdata.htab) {
php_error_docref(NULL, E_WARNING, "browscap ini directive not set");
RETURN_FALSE;
}
bdata = &global_bdata;
}
if (zend_parse_parameters(ZEND_NUM_ARGS(), "|s!b", &agent_name, &agent_name_len, &return_array) == FAILURE) {
return;
}
if (agent_name == NULL) {
if ((Z_TYPE(PG(http_globals)[TRACK_VARS_SERVER]) == IS_ARRAY || zend_is_auto_global_str(ZEND_STRL("_SERVER"))) &&
(http_user_agent = zend_hash_str_find(Z_ARRVAL_P(&PG(http_globals)[TRACK_VARS_SERVER]), "HTTP_USER_AGENT", sizeof("HTTP_USER_AGENT")-1)) == NULL
) {
php_error_docref(NULL, E_WARNING, "HTTP_USER_AGENT variable is not set, cannot determine user agent name");
RETURN_FALSE;
}
agent_name = Z_STRVAL_P(http_user_agent);
agent_name_len = Z_STRLEN_P(http_user_agent);
}
lookup_browser_name = estrndup(agent_name, agent_name_len);
php_strtolower(lookup_browser_name, agent_name_len);
if ((agent = zend_hash_str_find(bdata->htab, lookup_browser_name, agent_name_len)) == NULL) {
ZVAL_UNDEF(&found_browser_entry);
zend_hash_apply_with_arguments(bdata->htab, browser_reg_compare, 3, lookup_browser_name, agent_name_len, &found_browser_entry);
if (Z_TYPE(found_browser_entry) != IS_UNDEF) {
agent = &found_browser_entry;
} else if ((agent = zend_hash_str_find(bdata->htab, DEFAULT_SECTION_NAME, sizeof(DEFAULT_SECTION_NAME)-1)) == NULL) {
efree(lookup_browser_name);
RETURN_FALSE;
}
}
if (return_array) {
RETVAL_ARR(zend_array_dup(Z_ARRVAL_P(agent)));
}
else {
object_init(return_value);
zend_hash_copy(Z_OBJPROP_P(return_value), Z_ARRVAL_P(agent), (copy_ctor_func_t) browscap_zval_copy_ctor);
}
while ((z_agent_name = zend_hash_str_find(Z_ARRVAL_P(agent), "parent", sizeof("parent")-1)) != NULL) {
if ((agent = zend_hash_find(bdata->htab, Z_STR_P(z_agent_name))) == NULL) {
break;
}
if (return_array) {
zend_hash_merge(Z_ARRVAL_P(return_value), Z_ARRVAL_P(agent), (copy_ctor_func_t) browscap_zval_copy_ctor, 0);
}
else {
zend_hash_merge(Z_OBJPROP_P(return_value), Z_ARRVAL_P(agent), (copy_ctor_func_t) browscap_zval_copy_ctor, 0);
}
}
efree(lookup_browser_name);
}
/* }}} */
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
* vim600: sw=4 ts=4 fdm=marker
* vim<600: sw=4 ts=4
*/
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