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fastcgi.c
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/*
+----------------------------------------------------------------------+
| PHP Version 5 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2013 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 |
| [email protected] so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Dmitry Stogov <[email protected]> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#include "php.h"
#include "fastcgi.h"
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <errno.h>
#ifdef _WIN32
#include <windows.h>
typedef unsigned int in_addr_t;
struct sockaddr_un {
short sun_family;
char sun_path[MAXPATHLEN];
};
static HANDLE fcgi_accept_mutex = INVALID_HANDLE_VALUE;
static int is_impersonate = 0;
#define FCGI_LOCK(fd) \
if (fcgi_accept_mutex != INVALID_HANDLE_VALUE) { \
DWORD ret; \
while ((ret = WaitForSingleObject(fcgi_accept_mutex, 1000)) == WAIT_TIMEOUT) { \
if (in_shutdown) return -1; \
} \
if (ret == WAIT_FAILED) { \
fprintf(stderr, "WaitForSingleObject() failed\n"); \
return -1; \
} \
}
#define FCGI_UNLOCK(fd) \
if (fcgi_accept_mutex != INVALID_HANDLE_VALUE) { \
ReleaseMutex(fcgi_accept_mutex); \
}
#else
# include <sys/types.h>
# include <sys/stat.h>
# include <unistd.h>
# include <fcntl.h>
# include <sys/socket.h>
# include <sys/un.h>
# include <netinet/in.h>
# include <arpa/inet.h>
# include <netdb.h>
# include <signal.h>
# define closesocket(s) close(s)
# if defined(HAVE_SYS_POLL_H) && defined(HAVE_POLL)
# include <sys/poll.h>
# endif
# if defined(HAVE_SYS_SELECT_H)
# include <sys/select.h>
# endif
#ifndef INADDR_NONE
#define INADDR_NONE ((unsigned long) -1)
#endif
# ifndef HAVE_SOCKLEN_T
typedef unsigned int socklen_t;
# endif
# ifdef USE_LOCKING
# define FCGI_LOCK(fd) \
do { \
struct flock lock; \
lock.l_type = F_WRLCK; \
lock.l_start = 0; \
lock.l_whence = SEEK_SET; \
lock.l_len = 0; \
if (fcntl(fd, F_SETLKW, &lock) != -1) { \
break; \
} else if (errno != EINTR || in_shutdown) { \
return -1; \
} \
} while (1)
# define FCGI_UNLOCK(fd) \
do { \
int orig_errno = errno; \
while (1) { \
struct flock lock; \
lock.l_type = F_UNLCK; \
lock.l_start = 0; \
lock.l_whence = SEEK_SET; \
lock.l_len = 0; \
if (fcntl(fd, F_SETLK, &lock) != -1) { \
break; \
} else if (errno != EINTR) { \
return -1; \
} \
} \
errno = orig_errno; \
} while (0)
# else
# define FCGI_LOCK(fd)
# define FCGI_UNLOCK(fd)
# endif
#endif
typedef union _sa_t {
struct sockaddr sa;
struct sockaddr_un sa_unix;
struct sockaddr_in sa_inet;
} sa_t;
static HashTable fcgi_mgmt_vars;
static int is_initialized = 0;
static int is_fastcgi = 0;
static int in_shutdown = 0;
static in_addr_t *allowed_clients = NULL;
#ifdef _WIN32
static DWORD WINAPI fcgi_shutdown_thread(LPVOID arg)
{
HANDLE shutdown_event = (HANDLE) arg;
WaitForSingleObject(shutdown_event, INFINITE);
in_shutdown = 1;
return 0;
}
#else
static void fcgi_signal_handler(int signo)
{
if (signo == SIGUSR1 || signo == SIGTERM) {
in_shutdown = 1;
}
}
static void fcgi_setup_signals(void)
{
struct sigaction new_sa, old_sa;
sigemptyset(&new_sa.sa_mask);
new_sa.sa_flags = 0;
new_sa.sa_handler = fcgi_signal_handler;
sigaction(SIGUSR1, &new_sa, NULL);
sigaction(SIGTERM, &new_sa, NULL);
sigaction(SIGPIPE, NULL, &old_sa);
if (old_sa.sa_handler == SIG_DFL) {
sigaction(SIGPIPE, &new_sa, NULL);
}
}
#endif
int fcgi_in_shutdown(void)
{
return in_shutdown;
}
int fcgi_init(void)
{
if (!is_initialized) {
#ifndef _WIN32
sa_t sa;
socklen_t len = sizeof(sa);
#endif
zend_hash_init(&fcgi_mgmt_vars, 0, NULL, fcgi_free_mgmt_var_cb, 1);
fcgi_set_mgmt_var("FCGI_MPXS_CONNS", sizeof("FCGI_MPXS_CONNS")-1, "0", sizeof("0")-1);
is_initialized = 1;
#ifdef _WIN32
# if 0
/* TODO: Support for TCP sockets */
WSADATA wsaData;
if (WSAStartup(MAKEWORD(2,0), &wsaData)) {
fprintf(stderr, "Error starting Windows Sockets. Error: %d", WSAGetLastError());
return 0;
}
# endif
if ((GetStdHandle(STD_OUTPUT_HANDLE) == INVALID_HANDLE_VALUE) &&
(GetStdHandle(STD_ERROR_HANDLE) == INVALID_HANDLE_VALUE) &&
(GetStdHandle(STD_INPUT_HANDLE) != INVALID_HANDLE_VALUE)) {
char *str;
DWORD pipe_mode = PIPE_READMODE_BYTE | PIPE_WAIT;
HANDLE pipe = GetStdHandle(STD_INPUT_HANDLE);
SetNamedPipeHandleState(pipe, &pipe_mode, NULL, NULL);
str = getenv("_FCGI_SHUTDOWN_EVENT_");
if (str != NULL) {
HANDLE shutdown_event = (HANDLE) atoi(str);
if (!CreateThread(NULL, 0, fcgi_shutdown_thread,
shutdown_event, 0, NULL)) {
return -1;
}
}
str = getenv("_FCGI_MUTEX_");
if (str != NULL) {
fcgi_accept_mutex = (HANDLE) atoi(str);
}
return is_fastcgi = 1;
} else {
return is_fastcgi = 0;
}
#else
errno = 0;
if (getpeername(0, (struct sockaddr *)&sa, &len) != 0 && errno == ENOTCONN) {
fcgi_setup_signals();
return is_fastcgi = 1;
} else {
return is_fastcgi = 0;
}
#endif
}
return is_fastcgi;
}
int fcgi_is_fastcgi(void)
{
if (!is_initialized) {
return fcgi_init();
} else {
return is_fastcgi;
}
}
void fcgi_shutdown(void)
{
if (is_initialized) {
zend_hash_destroy(&fcgi_mgmt_vars);
}
is_fastcgi = 0;
if (allowed_clients) {
free(allowed_clients);
}
}
#ifdef _WIN32
/* Do some black magic with the NT security API.
* We prepare a DACL (Discretionary Access Control List) so that
* we, the creator, are allowed all access, while "Everyone Else"
* is only allowed to read and write to the pipe.
* This avoids security issues on shared hosts where a luser messes
* with the lower-level pipe settings and screws up the FastCGI service.
*/
static PACL prepare_named_pipe_acl(PSECURITY_DESCRIPTOR sd, LPSECURITY_ATTRIBUTES sa)
{
DWORD req_acl_size;
char everyone_buf[32], owner_buf[32];
PSID sid_everyone, sid_owner;
SID_IDENTIFIER_AUTHORITY
siaWorld = SECURITY_WORLD_SID_AUTHORITY,
siaCreator = SECURITY_CREATOR_SID_AUTHORITY;
PACL acl;
sid_everyone = (PSID)&everyone_buf;
sid_owner = (PSID)&owner_buf;
req_acl_size = sizeof(ACL) +
(2 * ((sizeof(ACCESS_ALLOWED_ACE) - sizeof(DWORD)) + GetSidLengthRequired(1)));
acl = malloc(req_acl_size);
if (acl == NULL) {
return NULL;
}
if (!InitializeSid(sid_everyone, &siaWorld, 1)) {
goto out_fail;
}
*GetSidSubAuthority(sid_everyone, 0) = SECURITY_WORLD_RID;
if (!InitializeSid(sid_owner, &siaCreator, 1)) {
goto out_fail;
}
*GetSidSubAuthority(sid_owner, 0) = SECURITY_CREATOR_OWNER_RID;
if (!InitializeAcl(acl, req_acl_size, ACL_REVISION)) {
goto out_fail;
}
if (!AddAccessAllowedAce(acl, ACL_REVISION, FILE_GENERIC_READ | FILE_GENERIC_WRITE, sid_everyone)) {
goto out_fail;
}
if (!AddAccessAllowedAce(acl, ACL_REVISION, FILE_ALL_ACCESS, sid_owner)) {
goto out_fail;
}
if (!InitializeSecurityDescriptor(sd, SECURITY_DESCRIPTOR_REVISION)) {
goto out_fail;
}
if (!SetSecurityDescriptorDacl(sd, TRUE, acl, FALSE)) {
goto out_fail;
}
sa->lpSecurityDescriptor = sd;
return acl;
out_fail:
free(acl);
return NULL;
}
#endif
static int is_port_number(const char *bindpath)
{
while (*bindpath) {
if (*bindpath < '0' || *bindpath > '9') {
return 0;
}
bindpath++;
}
return 1;
}
int fcgi_listen(const char *path, int backlog)
{
char *s;
int tcp = 0;
char host[MAXPATHLEN];
short port = 0;
int listen_socket;
sa_t sa;
socklen_t sock_len;
#ifdef SO_REUSEADDR
# ifdef _WIN32
BOOL reuse = 1;
# else
int reuse = 1;
# endif
#endif
if ((s = strchr(path, ':'))) {
port = atoi(s+1);
if (port != 0 && (s-path) < MAXPATHLEN) {
strncpy(host, path, s-path);
host[s-path] = '\0';
tcp = 1;
}
} else if (is_port_number(path)) {
port = atoi(path);
if (port != 0) {
host[0] = '\0';
tcp = 1;
}
}
/* Prepare socket address */
if (tcp) {
memset(&sa.sa_inet, 0, sizeof(sa.sa_inet));
sa.sa_inet.sin_family = AF_INET;
sa.sa_inet.sin_port = htons(port);
sock_len = sizeof(sa.sa_inet);
if (!*host || !strncmp(host, "*", sizeof("*")-1)) {
sa.sa_inet.sin_addr.s_addr = htonl(INADDR_ANY);
} else {
sa.sa_inet.sin_addr.s_addr = inet_addr(host);
if (sa.sa_inet.sin_addr.s_addr == INADDR_NONE) {
struct hostent *hep;
hep = gethostbyname(host);
if (!hep || hep->h_addrtype != AF_INET || !hep->h_addr_list[0]) {
fprintf(stderr, "Cannot resolve host name '%s'!\n", host);
return -1;
} else if (hep->h_addr_list[1]) {
fprintf(stderr, "Host '%s' has multiple addresses. You must choose one explicitly!\n", host);
return -1;
}
sa.sa_inet.sin_addr.s_addr = ((struct in_addr*)hep->h_addr_list[0])->s_addr;
}
}
} else {
#ifdef _WIN32
SECURITY_DESCRIPTOR sd;
SECURITY_ATTRIBUTES saw;
PACL acl;
HANDLE namedPipe;
memset(&sa, 0, sizeof(saw));
saw.nLength = sizeof(saw);
saw.bInheritHandle = FALSE;
acl = prepare_named_pipe_acl(&sd, &saw);
namedPipe = CreateNamedPipe(path,
PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
PIPE_TYPE_BYTE | PIPE_WAIT | PIPE_READMODE_BYTE,
PIPE_UNLIMITED_INSTANCES,
8192, 8192, 0, &saw);
if (namedPipe == INVALID_HANDLE_VALUE) {
return -1;
}
listen_socket = _open_osfhandle((long)namedPipe, 0);
if (!is_initialized) {
fcgi_init();
}
is_fastcgi = 1;
return listen_socket;
#else
int path_len = strlen(path);
if (path_len >= sizeof(sa.sa_unix.sun_path)) {
fprintf(stderr, "Listening socket's path name is too long.\n");
return -1;
}
memset(&sa.sa_unix, 0, sizeof(sa.sa_unix));
sa.sa_unix.sun_family = AF_UNIX;
memcpy(sa.sa_unix.sun_path, path, path_len + 1);
sock_len = (size_t)(((struct sockaddr_un *)0)->sun_path) + path_len;
#ifdef HAVE_SOCKADDR_UN_SUN_LEN
sa.sa_unix.sun_len = sock_len;
#endif
unlink(path);
#endif
}
/* Create, bind socket and start listen on it */
if ((listen_socket = socket(sa.sa.sa_family, SOCK_STREAM, 0)) < 0 ||
#ifdef SO_REUSEADDR
setsockopt(listen_socket, SOL_SOCKET, SO_REUSEADDR, (char*)&reuse, sizeof(reuse)) < 0 ||
#endif
bind(listen_socket, (struct sockaddr *) &sa, sock_len) < 0 ||
listen(listen_socket, backlog) < 0) {
fprintf(stderr, "Cannot bind/listen socket - [%d] %s.\n",errno, strerror(errno));
return -1;
}
if (!tcp) {
chmod(path, 0777);
} else {
char *ip = getenv("FCGI_WEB_SERVER_ADDRS");
char *cur, *end;
int n;
if (ip) {
ip = strdup(ip);
cur = ip;
n = 0;
while (*cur) {
if (*cur == ',') n++;
cur++;
}
allowed_clients = malloc(sizeof(in_addr_t) * (n+2));
n = 0;
cur = ip;
while (cur) {
end = strchr(cur, ',');
if (end) {
*end = 0;
end++;
}
allowed_clients[n] = inet_addr(cur);
if (allowed_clients[n] == INADDR_NONE) {
fprintf(stderr, "Wrong IP address '%s' in FCGI_WEB_SERVER_ADDRS\n", cur);
}
n++;
cur = end;
}
allowed_clients[n] = INADDR_NONE;
free(ip);
}
}
if (!is_initialized) {
fcgi_init();
}
is_fastcgi = 1;
#ifdef _WIN32
if (tcp) {
listen_socket = _open_osfhandle((long)listen_socket, 0);
}
#else
fcgi_setup_signals();
#endif
return listen_socket;
}
void fcgi_init_request(fcgi_request *req, int listen_socket)
{
memset(req, 0, sizeof(fcgi_request));
req->listen_socket = listen_socket;
req->fd = -1;
req->id = -1;
req->in_len = 0;
req->in_pad = 0;
req->out_hdr = NULL;
req->out_pos = req->out_buf;
#ifdef _WIN32
req->tcp = !GetNamedPipeInfo((HANDLE)_get_osfhandle(req->listen_socket), NULL, NULL, NULL, NULL);
#endif
}
static inline ssize_t safe_write(fcgi_request *req, const void *buf, size_t count)
{
int ret;
size_t n = 0;
do {
errno = 0;
#ifdef _WIN32
if (!req->tcp) {
ret = write(req->fd, ((char*)buf)+n, count-n);
} else {
ret = send(req->fd, ((char*)buf)+n, count-n, 0);
if (ret <= 0) {
errno = WSAGetLastError();
}
}
#else
ret = write(req->fd, ((char*)buf)+n, count-n);
#endif
if (ret > 0) {
n += ret;
} else if (ret <= 0 && errno != 0 && errno != EINTR) {
return ret;
}
} while (n != count);
return n;
}
static inline ssize_t safe_read(fcgi_request *req, const void *buf, size_t count)
{
int ret;
size_t n = 0;
do {
errno = 0;
#ifdef _WIN32
if (!req->tcp) {
ret = read(req->fd, ((char*)buf)+n, count-n);
} else {
ret = recv(req->fd, ((char*)buf)+n, count-n, 0);
if (ret <= 0) {
errno = WSAGetLastError();
}
}
#else
ret = read(req->fd, ((char*)buf)+n, count-n);
#endif
if (ret > 0) {
n += ret;
} else if (ret == 0 && errno == 0) {
return n;
} else if (ret <= 0 && errno != 0 && errno != EINTR) {
return ret;
}
} while (n != count);
return n;
}
static inline int fcgi_make_header(fcgi_header *hdr, fcgi_request_type type, int req_id, int len)
{
int pad = ((len + 7) & ~7) - len;
hdr->contentLengthB0 = (unsigned char)(len & 0xff);
hdr->contentLengthB1 = (unsigned char)((len >> 8) & 0xff);
hdr->paddingLength = (unsigned char)pad;
hdr->requestIdB0 = (unsigned char)(req_id & 0xff);
hdr->requestIdB1 = (unsigned char)((req_id >> 8) & 0xff);
hdr->reserved = 0;
hdr->type = type;
hdr->version = FCGI_VERSION_1;
if (pad) {
memset(((unsigned char*)hdr) + sizeof(fcgi_header) + len, 0, pad);
}
return pad;
}
static int fcgi_get_params(fcgi_request *req, unsigned char *p, unsigned char *end)
{
char buf[128];
char *tmp = buf;
size_t buf_size = sizeof(buf);
unsigned int name_len, val_len;
char *s;
int ret = 1;
while (p < end) {
name_len = *p++;
if (name_len >= 128) {
if (p + 3 >= end) {
ret = 0;
break;
}
name_len = ((name_len & 0x7f) << 24);
name_len |= (*p++ << 16);
name_len |= (*p++ << 8);
name_len |= *p++;
}
if (p >= end) {
ret = 0;
break;
}
val_len = *p++;
if (val_len >= 128) {
if (p + 3 >= end) {
ret = 0;
break;
}
val_len = ((val_len & 0x7f) << 24);
val_len |= (*p++ << 16);
val_len |= (*p++ << 8);
val_len |= *p++;
}
if (name_len + val_len > end - p) {
/* Malformated request */
ret = 0;
break;
}
if (name_len+1 >= buf_size) {
buf_size = name_len + 64;
tmp = (tmp == buf ? emalloc(buf_size): erealloc(tmp, buf_size));
}
memcpy(tmp, p, name_len);
tmp[name_len] = 0;
s = estrndup((char*)p + name_len, val_len);
zend_hash_update(req->env, tmp, name_len+1, &s, sizeof(char*), NULL);
p += name_len + val_len;
}
if (tmp != buf && tmp != NULL) {
efree(tmp);
}
return ret;
}
static void fcgi_free_var(char **s)
{
efree(*s);
}
static int fcgi_read_request(fcgi_request *req)
{
fcgi_header hdr;
int len, padding;
unsigned char buf[FCGI_MAX_LENGTH+8];
req->keep = 0;
req->closed = 0;
req->in_len = 0;
req->out_hdr = NULL;
req->out_pos = req->out_buf;
ALLOC_HASHTABLE(req->env);
zend_hash_init(req->env, 0, NULL, (void (*)(void *)) fcgi_free_var, 0);
if (safe_read(req, &hdr, sizeof(fcgi_header)) != sizeof(fcgi_header) ||
hdr.version < FCGI_VERSION_1) {
return 0;
}
len = (hdr.contentLengthB1 << 8) | hdr.contentLengthB0;
padding = hdr.paddingLength;
while (hdr.type == FCGI_STDIN && len == 0) {
if (safe_read(req, &hdr, sizeof(fcgi_header)) != sizeof(fcgi_header) ||
hdr.version < FCGI_VERSION_1) {
return 0;
}
len = (hdr.contentLengthB1 << 8) | hdr.contentLengthB0;
padding = hdr.paddingLength;
}
if (len + padding > FCGI_MAX_LENGTH) {
return 0;
}
req->id = (hdr.requestIdB1 << 8) + hdr.requestIdB0;
if (hdr.type == FCGI_BEGIN_REQUEST && len == sizeof(fcgi_begin_request)) {
char *val;
if (safe_read(req, buf, len+padding) != len+padding) {
return 0;
}
req->keep = (((fcgi_begin_request*)buf)->flags & FCGI_KEEP_CONN);
switch ((((fcgi_begin_request*)buf)->roleB1 << 8) + ((fcgi_begin_request*)buf)->roleB0) {
case FCGI_RESPONDER:
val = estrdup("RESPONDER");
zend_hash_update(req->env, "FCGI_ROLE", sizeof("FCGI_ROLE"), &val, sizeof(char*), NULL);
break;
case FCGI_AUTHORIZER:
val = estrdup("AUTHORIZER");
zend_hash_update(req->env, "FCGI_ROLE", sizeof("FCGI_ROLE"), &val, sizeof(char*), NULL);
break;
case FCGI_FILTER:
val = estrdup("FILTER");
zend_hash_update(req->env, "FCGI_ROLE", sizeof("FCGI_ROLE"), &val, sizeof(char*), NULL);
break;
default:
return 0;
}
if (safe_read(req, &hdr, sizeof(fcgi_header)) != sizeof(fcgi_header) ||
hdr.version < FCGI_VERSION_1) {
return 0;
}
len = (hdr.contentLengthB1 << 8) | hdr.contentLengthB0;
padding = hdr.paddingLength;
while (hdr.type == FCGI_PARAMS && len > 0) {
if (len + padding > FCGI_MAX_LENGTH) {
return 0;
}
if (safe_read(req, buf, len+padding) != len+padding) {
req->keep = 0;
return 0;
}
if (!fcgi_get_params(req, buf, buf+len)) {
req->keep = 0;
return 0;
}
if (safe_read(req, &hdr, sizeof(fcgi_header)) != sizeof(fcgi_header) ||
hdr.version < FCGI_VERSION_1) {
req->keep = 0;
return 0;
}
len = (hdr.contentLengthB1 << 8) | hdr.contentLengthB0;
padding = hdr.paddingLength;
}
} else if (hdr.type == FCGI_GET_VALUES) {
unsigned char *p = buf + sizeof(fcgi_header);
HashPosition pos;
char * str_index;
uint str_length;
ulong num_index;
int key_type;
zval ** value;
if (safe_read(req, buf, len+padding) != len+padding) {
req->keep = 0;
return 0;
}
if (!fcgi_get_params(req, buf, buf+len)) {
req->keep = 0;
return 0;
}
zend_hash_internal_pointer_reset_ex(req->env, &pos);
while ((key_type = zend_hash_get_current_key_ex(req->env, &str_index, &str_length, &num_index, 0, &pos)) != HASH_KEY_NON_EXISTANT) {
int zlen;
zend_hash_move_forward_ex(req->env, &pos);
if (key_type != HASH_KEY_IS_STRING) {
continue;
}
if (zend_hash_find(&fcgi_mgmt_vars, str_index, str_length, (void**) &value) != SUCCESS) {
continue;
}
--str_length;
zlen = Z_STRLEN_PP(value);
if ((p + 4 + 4 + str_length + zlen) >= (buf + sizeof(buf))) {
break;
}
if (str_length < 0x80) {
*p++ = str_length;
} else {
*p++ = ((str_length >> 24) & 0xff) | 0x80;
*p++ = (str_length >> 16) & 0xff;
*p++ = (str_length >> 8) & 0xff;
*p++ = str_length & 0xff;
}
if (zlen < 0x80) {
*p++ = zlen;
} else {
*p++ = ((zlen >> 24) & 0xff) | 0x80;
*p++ = (zlen >> 16) & 0xff;
*p++ = (zlen >> 8) & 0xff;
*p++ = zlen & 0xff;
}
memcpy(p, str_index, str_length);
p += str_length;
memcpy(p, Z_STRVAL_PP(value), zlen);
p += zlen;
}
len = p - buf - sizeof(fcgi_header);
len += fcgi_make_header((fcgi_header*)buf, FCGI_GET_VALUES_RESULT, 0, len);
if (safe_write(req, buf, sizeof(fcgi_header)+len) != (int)sizeof(fcgi_header)+len) {
req->keep = 0;
return 0;
}
return 0;
} else {
return 0;
}
return 1;
}
int fcgi_read(fcgi_request *req, char *str, int len)
{
int ret, n, rest;
fcgi_header hdr;
unsigned char buf[255];
n = 0;
rest = len;
while (rest > 0) {
if (req->in_len == 0) {
if (safe_read(req, &hdr, sizeof(fcgi_header)) != sizeof(fcgi_header) ||
hdr.version < FCGI_VERSION_1 ||
hdr.type != FCGI_STDIN) {
req->keep = 0;
return 0;
}
req->in_len = (hdr.contentLengthB1 << 8) | hdr.contentLengthB0;
req->in_pad = hdr.paddingLength;
if (req->in_len == 0) {
return n;
}
}
if (req->in_len >= rest) {
ret = safe_read(req, str, rest);
} else {
ret = safe_read(req, str, req->in_len);
}
if (ret < 0) {
req->keep = 0;
return ret;
} else if (ret > 0) {
req->in_len -= ret;
rest -= ret;
n += ret;
str += ret;
if (req->in_len == 0) {
if (req->in_pad) {
if (safe_read(req, buf, req->in_pad) != req->in_pad) {
req->keep = 0;
return ret;
}
}
} else {
return n;
}
} else {
return n;
}
}
return n;
}
static inline void fcgi_close(fcgi_request *req, int force, int destroy)
{
if (destroy && req->env) {
zend_hash_destroy(req->env);
FREE_HASHTABLE(req->env);
req->env = NULL;
}
#ifdef _WIN32
if (is_impersonate && !req->tcp) {
RevertToSelf();
}
#endif
if ((force || !req->keep) && req->fd >= 0) {
#ifdef _WIN32
if (!req->tcp) {
HANDLE pipe = (HANDLE)_get_osfhandle(req->fd);
if (!force) {
FlushFileBuffers(pipe);
}
DisconnectNamedPipe(pipe);
} else {
if (!force) {
char buf[8];
shutdown(req->fd, 1);
while (recv(req->fd, buf, sizeof(buf), 0) > 0) {}
}
closesocket(req->fd);
}
#else
if (!force) {
char buf[8];
shutdown(req->fd, 1);
while (recv(req->fd, buf, sizeof(buf), 0) > 0) {}
}
close(req->fd);
#endif
req->fd = -1;
}
}
int fcgi_accept_request(fcgi_request *req)
{
#ifdef _WIN32
HANDLE pipe;
OVERLAPPED ov;
#endif
while (1) {
if (req->fd < 0) {
while (1) {
if (in_shutdown) {
return -1;
}
#ifdef _WIN32
if (!req->tcp) {
pipe = (HANDLE)_get_osfhandle(req->listen_socket);
FCGI_LOCK(req->listen_socket);
ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
if (!ConnectNamedPipe(pipe, &ov)) {
errno = GetLastError();
if (errno == ERROR_IO_PENDING) {
while (WaitForSingleObject(ov.hEvent, 1000) == WAIT_TIMEOUT) {
if (in_shutdown) {
CloseHandle(ov.hEvent);
FCGI_UNLOCK(req->listen_socket);
return -1;
}
}
} else if (errno != ERROR_PIPE_CONNECTED) {
}
}
CloseHandle(ov.hEvent);
req->fd = req->listen_socket;
FCGI_UNLOCK(req->listen_socket);
} else {
SOCKET listen_socket = (SOCKET)_get_osfhandle(req->listen_socket);
#else
{
int listen_socket = req->listen_socket;
#endif
sa_t sa;
socklen_t len = sizeof(sa);
FCGI_LOCK(req->listen_socket);
req->fd = accept(listen_socket, (struct sockaddr *)&sa, &len);
FCGI_UNLOCK(req->listen_socket);
if (req->fd >= 0 && allowed_clients) {
int n = 0;
int allowed = 0;
while (allowed_clients[n] != INADDR_NONE) {
if (allowed_clients[n] == sa.sa_inet.sin_addr.s_addr) {
allowed = 1;
break;
}
n++;
}
if (!allowed) {
fprintf(stderr, "Connection from disallowed IP address '%s' is dropped.\n", inet_ntoa(sa.sa_inet.sin_addr));
closesocket(req->fd);
req->fd = -1;
continue;
}
}
}
#ifdef _WIN32
if (req->fd < 0 && (in_shutdown || errno != EINTR)) {
#else
if (req->fd < 0 && (in_shutdown || (errno != EINTR && errno != ECONNABORTED))) {
#endif
return -1;
}