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/*
+----------------------------------------------------------------------+
| PHP Version 7 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2018 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. |
+----------------------------------------------------------------------+
| Authors: Sascha Schumann <sascha@schumann.cx> |
| Parts based on Apache 1.3 SAPI module by |
| Rasmus Lerdorf and Zeev Suraski |
+----------------------------------------------------------------------+
*/
#define ZEND_INCLUDE_FULL_WINDOWS_HEADERS
#include "php.h"
#include "php_main.h"
#include "php_ini.h"
#include "php_variables.h"
#include "SAPI.h"
#include <fcntl.h>
#include "zend_smart_str.h"
#include "ext/standard/php_standard.h"
#include "apr_strings.h"
#include "ap_config.h"
#include "util_filter.h"
#include "httpd.h"
#include "http_config.h"
#include "http_request.h"
#include "http_core.h"
#include "http_protocol.h"
#include "http_log.h"
#include "http_main.h"
#include "util_script.h"
#include "http_core.h"
#include "ap_mpm.h"
#include "php_apache.h"
/* UnixWare define shutdown to _shutdown, which causes problems later
* on when using a structure member named shutdown. Since this source
* file does not use the system call shutdown, it is safe to #undef it.
*/
#undef shutdown
#define PHP_MAGIC_TYPE "application/x-httpd-php"
#define PHP_SOURCE_MAGIC_TYPE "application/x-httpd-php-source"
#define PHP_SCRIPT "php7-script"
/* A way to specify the location of the php.ini dir in an apache directive */
char *apache2_php_ini_path_override = NULL;
#if defined(PHP_WIN32) && defined(ZTS)
ZEND_TSRMLS_CACHE_DEFINE()
#endif
static size_t
php_apache_sapi_ub_write(const char *str, size_t str_length)
{
request_rec *r;
php_struct *ctx;
ctx = SG(server_context);
r = ctx->r;
if (ap_rwrite(str, str_length, r) < 0) {
php_handle_aborted_connection();
}
return str_length; /* we always consume all the data passed to us. */
}
static int
php_apache_sapi_header_handler(sapi_header_struct *sapi_header, sapi_header_op_enum op, sapi_headers_struct *sapi_headers)
{
php_struct *ctx;
char *val, *ptr;
ctx = SG(server_context);
switch (op) {
case SAPI_HEADER_DELETE:
apr_table_unset(ctx->r->headers_out, sapi_header->header);
return 0;
case SAPI_HEADER_DELETE_ALL:
apr_table_clear(ctx->r->headers_out);
return 0;
case SAPI_HEADER_ADD:
case SAPI_HEADER_REPLACE:
val = strchr(sapi_header->header, ':');
if (!val) {
return 0;
}
ptr = val;
*val = '\0';
do {
val++;
} while (*val == ' ');
if (!strcasecmp(sapi_header->header, "content-type")) {
if (ctx->content_type) {
efree(ctx->content_type);
}
ctx->content_type = estrdup(val);
} else if (!strcasecmp(sapi_header->header, "content-length")) {
apr_off_t clen = 0;
if (APR_SUCCESS != apr_strtoff(&clen, val, (char **) NULL, 10)) {
/* We'll fall back to strtol, since that's what we used to
* do anyway. */
clen = (apr_off_t) strtol(val, (char **) NULL, 10);
}
ap_set_content_length(ctx->r, clen);
} else if (op == SAPI_HEADER_REPLACE) {
apr_table_set(ctx->r->headers_out, sapi_header->header, val);
} else {
apr_table_add(ctx->r->headers_out, sapi_header->header, val);
}
*ptr = ':';
return SAPI_HEADER_ADD;
default:
return 0;
}
}
static int
php_apache_sapi_send_headers(sapi_headers_struct *sapi_headers)
{
php_struct *ctx = SG(server_context);
const char *sline = SG(sapi_headers).http_status_line;
ctx->r->status = SG(sapi_headers).http_response_code;
/* httpd requires that r->status_line is set to the first digit of
* the status-code: */
if (sline && strlen(sline) > 12 && strncmp(sline, "HTTP/1.", 7) == 0 && sline[8] == ' ') {
ctx->r->status_line = apr_pstrdup(ctx->r->pool, sline + 9);
ctx->r->proto_num = 1000 + (sline[7]-'0');
if ((sline[7]-'0') == 0) {
apr_table_set(ctx->r->subprocess_env, "force-response-1.0", "true");
}
}
/* call ap_set_content_type only once, else each time we call it,
configured output filters for that content type will be added */
if (!ctx->content_type) {
ctx->content_type = sapi_get_default_content_type();
}
ap_set_content_type(ctx->r, apr_pstrdup(ctx->r->pool, ctx->content_type));
efree(ctx->content_type);
ctx->content_type = NULL;
return SAPI_HEADER_SENT_SUCCESSFULLY;
}
static apr_size_t
php_apache_sapi_read_post(char *buf, size_t count_bytes)
{
apr_size_t len, tlen=0;
php_struct *ctx = SG(server_context);
request_rec *r;
apr_bucket_brigade *brigade;
r = ctx->r;
brigade = ctx->brigade;
len = count_bytes;
/*
* This loop is needed because ap_get_brigade() can return us partial data
* which would cause premature termination of request read. Therefor we
* need to make sure that if data is available we fill the buffer completely.
*/
while (ap_get_brigade(r->input_filters, brigade, AP_MODE_READBYTES, APR_BLOCK_READ, len) == APR_SUCCESS) {
apr_brigade_flatten(brigade, buf, &len);
apr_brigade_cleanup(brigade);
tlen += len;
if (tlen == count_bytes || !len) {
break;
}
buf += len;
len = count_bytes - tlen;
}
return tlen;
}
static zend_stat_t*
php_apache_sapi_get_stat(void)
{
php_struct *ctx = SG(server_context);
#ifdef PHP_WIN32
ctx->finfo.st_uid = 0;
ctx->finfo.st_gid = 0;
#else
ctx->finfo.st_uid = ctx->r->finfo.user;
ctx->finfo.st_gid = ctx->r->finfo.group;
#endif
ctx->finfo.st_dev = ctx->r->finfo.device;
ctx->finfo.st_ino = ctx->r->finfo.inode;
ctx->finfo.st_atime = apr_time_sec(ctx->r->finfo.atime);
ctx->finfo.st_mtime = apr_time_sec(ctx->r->finfo.mtime);
ctx->finfo.st_ctime = apr_time_sec(ctx->r->finfo.ctime);
ctx->finfo.st_size = ctx->r->finfo.size;
ctx->finfo.st_nlink = ctx->r->finfo.nlink;
return &ctx->finfo;
}
static char *
php_apache_sapi_read_cookies(void)
{
php_struct *ctx = SG(server_context);
const char *http_cookie;
http_cookie = apr_table_get(ctx->r->headers_in, "cookie");
/* The SAPI interface should use 'const char *' */
return (char *) http_cookie;
}
static char *
php_apache_sapi_getenv(char *name, size_t name_len)
{
php_struct *ctx = SG(server_context);
const char *env_var;
if (ctx == NULL) {
return NULL;
}
env_var = apr_table_get(ctx->r->subprocess_env, name);
return (char *) env_var;
}
static void
php_apache_sapi_register_variables(zval *track_vars_array)
{
php_struct *ctx = SG(server_context);
const apr_array_header_t *arr = apr_table_elts(ctx->r->subprocess_env);
char *key, *val;
size_t new_val_len;
APR_ARRAY_FOREACH_OPEN(arr, key, val)
if (!val) {
val = "";
}
if (sapi_module.input_filter(PARSE_SERVER, key, &val, strlen(val), &new_val_len)) {
php_register_variable_safe(key, val, new_val_len, track_vars_array);
}
APR_ARRAY_FOREACH_CLOSE()
if (sapi_module.input_filter(PARSE_SERVER, "PHP_SELF", &ctx->r->uri, strlen(ctx->r->uri), &new_val_len)) {
php_register_variable_safe("PHP_SELF", ctx->r->uri, new_val_len, track_vars_array);
}
}
static void
php_apache_sapi_flush(void *server_context)
{
php_struct *ctx;
request_rec *r;
ctx = server_context;
/* If we haven't registered a server_context yet,
* then don't bother flushing. */
if (!server_context) {
return;
}
r = ctx->r;
sapi_send_headers();
r->status = SG(sapi_headers).http_response_code;
SG(headers_sent) = 1;
if (ap_rflush(r) < 0 || r->connection->aborted) {
php_handle_aborted_connection();
}
}
static void php_apache_sapi_log_message(char *msg, int syslog_type_int)
{
php_struct *ctx;
int aplog_type = APLOG_ERR;
ctx = SG(server_context);
switch (syslog_type_int) {
#if LOG_EMERG != LOG_CRIT
case LOG_EMERG:
aplog_type = APLOG_EMERG;
break;
#endif
#if LOG_ALERT != LOG_CRIT
case LOG_ALERT:
aplog_type = APLOG_ALERT;
break;
#endif
case LOG_CRIT:
aplog_type = APLOG_CRIT;
break;
case LOG_ERR:
aplog_type = APLOG_ERR;
break;
case LOG_WARNING:
aplog_type = APLOG_WARNING;
break;
case LOG_NOTICE:
aplog_type = APLOG_NOTICE;
break;
#if LOG_INFO != LOG_NOTICE
case LOG_INFO:
aplog_type = APLOG_INFO;
break;
#endif
#if LOG_NOTICE != LOG_DEBUG
case LOG_DEBUG:
aplog_type = APLOG_DEBUG;
break;
#endif
}
if (ctx == NULL) { /* we haven't initialized our ctx yet, oh well */
ap_log_error(APLOG_MARK, APLOG_ERR | APLOG_STARTUP, 0, NULL, "%s", msg);
} else {
ap_log_rerror(APLOG_MARK, aplog_type, 0, ctx->r, "%s", msg);
}
}
static void php_apache_sapi_log_message_ex(char *msg, request_rec *r)
{
if (r) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, msg, r->filename);
} else {
php_apache_sapi_log_message(msg, -1);
}
}
static double php_apache_sapi_get_request_time(void)
{
php_struct *ctx = SG(server_context);
return ((double) ctx->r->request_time) / 1000000.0;
}
extern zend_module_entry php_apache_module;
static int php_apache2_startup(sapi_module_struct *sapi_module)
{
if (php_module_startup(sapi_module, &php_apache_module, 1)==FAILURE) {
return FAILURE;
}
return SUCCESS;
}
static sapi_module_struct apache2_sapi_module = {
"apache2handler",
"Apache 2.0 Handler",
php_apache2_startup, /* startup */
php_module_shutdown_wrapper, /* shutdown */
NULL, /* activate */
NULL, /* deactivate */
php_apache_sapi_ub_write, /* unbuffered write */
php_apache_sapi_flush, /* flush */
php_apache_sapi_get_stat, /* get uid */
php_apache_sapi_getenv, /* getenv */
php_error, /* error handler */
php_apache_sapi_header_handler, /* header handler */
php_apache_sapi_send_headers, /* send headers handler */
NULL, /* send header handler */
php_apache_sapi_read_post, /* read POST data */
php_apache_sapi_read_cookies, /* read Cookies */
php_apache_sapi_register_variables,
php_apache_sapi_log_message, /* Log message */
php_apache_sapi_get_request_time, /* Request Time */
NULL, /* Child Terminate */
STANDARD_SAPI_MODULE_PROPERTIES
};
static apr_status_t php_apache_server_shutdown(void *tmp)
{
apache2_sapi_module.shutdown(&apache2_sapi_module);
sapi_shutdown();
#ifdef ZTS
tsrm_shutdown();
#endif
return APR_SUCCESS;
}
static apr_status_t php_apache_child_shutdown(void *tmp)
{
apache2_sapi_module.shutdown(&apache2_sapi_module);
#if defined(ZTS) && !defined(PHP_WIN32)
tsrm_shutdown();
#endif
return APR_SUCCESS;
}
static void php_apache_add_version(apr_pool_t *p)
{
if (PG(expose_php)) {
ap_add_version_component(p, "PHP/" PHP_VERSION);
}
}
static int php_pre_config(apr_pool_t *pconf, apr_pool_t *plog, apr_pool_t *ptemp)
{
#ifndef ZTS
int threaded_mpm;
ap_mpm_query(AP_MPMQ_IS_THREADED, &threaded_mpm);
if(threaded_mpm) {
ap_log_error(APLOG_MARK, APLOG_CRIT, 0, 0, "Apache is running a threaded MPM, but your PHP Module is not compiled to be threadsafe. You need to recompile PHP.");
return DONE;
}
#endif
/* When this is NULL, apache won't override the hard-coded default
* php.ini path setting. */
apache2_php_ini_path_override = NULL;
return OK;
}
static int
php_apache_server_startup(apr_pool_t *pconf, apr_pool_t *plog, apr_pool_t *ptemp, server_rec *s)
{
void *data = NULL;
const char *userdata_key = "apache2hook_post_config";
/* Apache will load, unload and then reload a DSO module. This
* prevents us from starting PHP until the second load. */
apr_pool_userdata_get(&data, userdata_key, s->process->pool);
if (data == NULL) {
/* We must use set() here and *not* setn(), otherwise the
* static string pointed to by userdata_key will be mapped
* to a different location when the DSO is reloaded and the
* pointers won't match, causing get() to return NULL when
* we expected it to return non-NULL. */
apr_pool_userdata_set((const void *)1, userdata_key, apr_pool_cleanup_null, s->process->pool);
return OK;
}
/* Set up our overridden path. */
if (apache2_php_ini_path_override) {
apache2_sapi_module.php_ini_path_override = apache2_php_ini_path_override;
}
#ifdef ZTS
tsrm_startup(1, 1, 0, NULL);
(void)ts_resource(0);
ZEND_TSRMLS_CACHE_UPDATE();
#endif
zend_signal_startup();
sapi_startup(&apache2_sapi_module);
apache2_sapi_module.startup(&apache2_sapi_module);
apr_pool_cleanup_register(pconf, NULL, php_apache_server_shutdown, apr_pool_cleanup_null);
php_apache_add_version(pconf);
return OK;
}
static apr_status_t php_server_context_cleanup(void *data_)
{
void **data = data_;
*data = NULL;
return APR_SUCCESS;
}
static int php_apache_request_ctor(request_rec *r, php_struct *ctx)
{
char *content_length;
const char *auth;
SG(sapi_headers).http_response_code = !r->status ? HTTP_OK : r->status;
SG(request_info).content_type = apr_table_get(r->headers_in, "Content-Type");
SG(request_info).query_string = apr_pstrdup(r->pool, r->args);
SG(request_info).request_method = r->method;
SG(request_info).proto_num = r->proto_num;
SG(request_info).request_uri = apr_pstrdup(r->pool, r->uri);
SG(request_info).path_translated = apr_pstrdup(r->pool, r->filename);
r->no_local_copy = 1;
content_length = (char *) apr_table_get(r->headers_in, "Content-Length");
if (content_length) {
ZEND_ATOL(SG(request_info).content_length, content_length);
} else {
SG(request_info).content_length = 0;
}
apr_table_unset(r->headers_out, "Content-Length");
apr_table_unset(r->headers_out, "Last-Modified");
apr_table_unset(r->headers_out, "Expires");
apr_table_unset(r->headers_out, "ETag");
auth = apr_table_get(r->headers_in, "Authorization");
php_handle_auth_data(auth);
if (SG(request_info).auth_user == NULL && r->user) {
SG(request_info).auth_user = estrdup(r->user);
}
ctx->r->user = apr_pstrdup(ctx->r->pool, SG(request_info).auth_user);
return php_request_startup();
}
static void php_apache_request_dtor(request_rec *r)
{
php_request_shutdown(NULL);
}
static void php_apache_ini_dtor(request_rec *r, request_rec *p)
{
if (strcmp(r->protocol, "INCLUDED")) {
zend_try { zend_ini_deactivate(); } zend_end_try();
} else {
typedef struct {
HashTable config;
} php_conf_rec;
zend_string *str;
php_conf_rec *c = ap_get_module_config(r->per_dir_config, &php7_module);
ZEND_HASH_FOREACH_STR_KEY(&c->config, str) {
zend_restore_ini_entry(str, ZEND_INI_STAGE_SHUTDOWN);
} ZEND_HASH_FOREACH_END();
}
if (p) {
((php_struct *)SG(server_context))->r = p;
} else {
apr_pool_cleanup_run(r->pool, (void *)&SG(server_context), php_server_context_cleanup);
}
}
static int php_handler(request_rec *r)
{
php_struct * volatile ctx;
void *conf;
apr_bucket_brigade * volatile brigade;
apr_bucket *bucket;
apr_status_t rv;
request_rec * volatile parent_req = NULL;
#ifdef ZTS
/* initial resource fetch */
(void)ts_resource(0);
ZEND_TSRMLS_CACHE_UPDATE();
#endif
#define PHPAP_INI_OFF php_apache_ini_dtor(r, parent_req);
conf = ap_get_module_config(r->per_dir_config, &php7_module);
/* apply_config() needs r in some cases, so allocate server_context early */
ctx = SG(server_context);
if (ctx == NULL || (ctx && ctx->request_processed && !strcmp(r->protocol, "INCLUDED"))) {
normal:
ctx = SG(server_context) = apr_pcalloc(r->pool, sizeof(*ctx));
/* register a cleanup so we clear out the SG(server_context)
* after each request. Note: We pass in the pointer to the
* server_context in case this is handled by a different thread.
*/
apr_pool_cleanup_register(r->pool, (void *)&SG(server_context), php_server_context_cleanup, apr_pool_cleanup_null);
ctx->r = r;
ctx = NULL; /* May look weird to null it here, but it is to catch the right case in the first_try later on */
} else {
parent_req = ctx->r;
ctx->r = r;
}
apply_config(conf);
if (strcmp(r->handler, PHP_MAGIC_TYPE) && strcmp(r->handler, PHP_SOURCE_MAGIC_TYPE) && strcmp(r->handler, PHP_SCRIPT)) {
/* Check for xbithack in this case. */
if (!AP2(xbithack) || strcmp(r->handler, "text/html") || !(r->finfo.protection & APR_UEXECUTE)) {
PHPAP_INI_OFF;
return DECLINED;
}
}
/* Give a 404 if PATH_INFO is used but is explicitly disabled in
* the configuration; default behaviour is to accept. */
if (r->used_path_info == AP_REQ_REJECT_PATH_INFO
&& r->path_info && r->path_info[0]) {
PHPAP_INI_OFF;
return HTTP_NOT_FOUND;
}
/* handle situations where user turns the engine off */
if (!AP2(engine)) {
PHPAP_INI_OFF;
return DECLINED;
}
if (r->finfo.filetype == 0) {
php_apache_sapi_log_message_ex("script '%s' not found or unable to stat", r);
PHPAP_INI_OFF;
return HTTP_NOT_FOUND;
}
if (r->finfo.filetype == APR_DIR) {
php_apache_sapi_log_message_ex("attempt to invoke directory '%s' as script", r);
PHPAP_INI_OFF;
return HTTP_FORBIDDEN;
}
/* Setup the CGI variables if this is the main request */
if (r->main == NULL ||
/* .. or if the sub-request environment differs from the main-request. */
r->subprocess_env != r->main->subprocess_env
) {
/* setup standard CGI variables */
ap_add_common_vars(r);
ap_add_cgi_vars(r);
}
zend_first_try {
if (ctx == NULL) {
brigade = apr_brigade_create(r->pool, r->connection->bucket_alloc);
ctx = SG(server_context);
ctx->brigade = brigade;
if (php_apache_request_ctor(r, ctx)!=SUCCESS) {
zend_bailout();
}
} else {
if (!parent_req) {
parent_req = ctx->r;
}
if (parent_req && parent_req->handler &&
strcmp(parent_req->handler, PHP_MAGIC_TYPE) &&
strcmp(parent_req->handler, PHP_SOURCE_MAGIC_TYPE) &&
strcmp(parent_req->handler, PHP_SCRIPT)) {
if (php_apache_request_ctor(r, ctx)!=SUCCESS) {
zend_bailout();
}
}
/*
* check if coming due to ErrorDocument
* We make a special exception of 413 (Invalid POST request) as the invalidity of the request occurs
* during processing of the request by PHP during POST processing. Therefor we need to re-use the exiting
* PHP instance to handle the request rather then creating a new one.
*/
if (parent_req && parent_req->status != HTTP_OK && parent_req->status != 413 && strcmp(r->protocol, "INCLUDED")) {
parent_req = NULL;
goto normal;
}
ctx->r = r;
brigade = ctx->brigade;
}
if (AP2(last_modified)) {
ap_update_mtime(r, r->finfo.mtime);
ap_set_last_modified(r);
}
/* Determine if we need to parse the file or show the source */
if (strncmp(r->handler, PHP_SOURCE_MAGIC_TYPE, sizeof(PHP_SOURCE_MAGIC_TYPE) - 1) == 0) {
zend_syntax_highlighter_ini syntax_highlighter_ini;
php_get_highlight_struct(&syntax_highlighter_ini);
highlight_file((char *)r->filename, &syntax_highlighter_ini);
} else {
zend_file_handle zfd;
zfd.type = ZEND_HANDLE_FILENAME;
zfd.filename = (char *) r->filename;
zfd.free_filename = 0;
zfd.opened_path = NULL;
if (!parent_req) {
php_execute_script(&zfd);
} else {
zend_execute_scripts(ZEND_INCLUDE, NULL, 1, &zfd);
}
apr_table_set(r->notes, "mod_php_memory_usage",
apr_psprintf(ctx->r->pool, "%" APR_SIZE_T_FMT, zend_memory_peak_usage(1)));
}
} zend_end_try();
if (!parent_req) {
php_apache_request_dtor(r);
ctx->request_processed = 1;
apr_brigade_cleanup(brigade);
bucket = apr_bucket_eos_create(r->connection->bucket_alloc);
APR_BRIGADE_INSERT_TAIL(brigade, bucket);
rv = ap_pass_brigade(r->output_filters, brigade);
if (rv != APR_SUCCESS || r->connection->aborted) {
zend_first_try {
php_handle_aborted_connection();
} zend_end_try();
}
apr_brigade_cleanup(brigade);
apr_pool_cleanup_run(r->pool, (void *)&SG(server_context), php_server_context_cleanup);
} else {
ctx->r = parent_req;
}
return OK;
}
static void php_apache_child_init(apr_pool_t *pchild, server_rec *s)
{
apr_pool_cleanup_register(pchild, NULL, php_apache_child_shutdown, apr_pool_cleanup_null);
}
#ifdef ZEND_SIGNALS
static void php_apache_signal_init(apr_pool_t *pchild, server_rec *s)
{
zend_signal_init();
}
#endif
void php_ap2_register_hook(apr_pool_t *p)
{
ap_hook_pre_config(php_pre_config, NULL, NULL, APR_HOOK_MIDDLE);
ap_hook_post_config(php_apache_server_startup, NULL, NULL, APR_HOOK_MIDDLE);
ap_hook_handler(php_handler, NULL, NULL, APR_HOOK_MIDDLE);
#ifdef ZEND_SIGNALS
ap_hook_child_init(php_apache_signal_init, NULL, NULL, APR_HOOK_MIDDLE);
#endif
ap_hook_child_init(php_apache_child_init, NULL, NULL, APR_HOOK_MIDDLE);
}
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
* vim600: sw=4 ts=4 fdm=marker
* vim<600: sw=4 ts=4
*/