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fastcgi.c
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fastcgi.c
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/*
+----------------------------------------------------------------------+
| Copyright (c) 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: |
| https://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: Dmitry Stogov <dmitry@php.net> |
+----------------------------------------------------------------------+
*/
#include "php.h"
#include "php_network.h"
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <errno.h>
#ifndef MAXFQDNLEN
#define MAXFQDNLEN 255
#endif
#ifdef _WIN32
#include <windows.h>
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 <netinet/tcp.h>
# include <arpa/inet.h>
# include <netdb.h>
# include <signal.h>
# if defined(HAVE_POLL_H) && defined(HAVE_POLL)
# include <poll.h>
# elif 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
#include "fastcgi.h"
typedef struct _fcgi_header {
unsigned char version;
unsigned char type;
unsigned char requestIdB1;
unsigned char requestIdB0;
unsigned char contentLengthB1;
unsigned char contentLengthB0;
unsigned char paddingLength;
unsigned char reserved;
} fcgi_header;
typedef struct _fcgi_begin_request {
unsigned char roleB1;
unsigned char roleB0;
unsigned char flags;
unsigned char reserved[5];
} fcgi_begin_request;
typedef struct _fcgi_begin_request_rec {
fcgi_header hdr;
fcgi_begin_request body;
} fcgi_begin_request_rec;
typedef struct _fcgi_end_request {
unsigned char appStatusB3;
unsigned char appStatusB2;
unsigned char appStatusB1;
unsigned char appStatusB0;
unsigned char protocolStatus;
unsigned char reserved[3];
} fcgi_end_request;
typedef struct _fcgi_end_request_rec {
fcgi_header hdr;
fcgi_end_request body;
} fcgi_end_request_rec;
typedef struct _fcgi_hash_bucket {
unsigned int hash_value;
unsigned int var_len;
char *var;
unsigned int val_len;
char *val;
struct _fcgi_hash_bucket *next;
struct _fcgi_hash_bucket *list_next;
} fcgi_hash_bucket;
typedef struct _fcgi_hash_buckets {
unsigned int idx;
struct _fcgi_hash_buckets *next;
struct _fcgi_hash_bucket data[FCGI_HASH_TABLE_SIZE];
} fcgi_hash_buckets;
typedef struct _fcgi_data_seg {
char *pos;
char *end;
struct _fcgi_data_seg *next;
char data[1];
} fcgi_data_seg;
typedef struct _fcgi_hash {
fcgi_hash_bucket *hash_table[FCGI_HASH_TABLE_SIZE];
fcgi_hash_bucket *list;
fcgi_hash_buckets *buckets;
fcgi_data_seg *data;
} fcgi_hash;
typedef struct _fcgi_req_hook fcgi_req_hook;
struct _fcgi_req_hook {
void(*on_accept)(void);
void(*on_read)(void);
void(*on_close)(void);
};
struct _fcgi_request {
int listen_socket;
int tcp;
int fd;
int id;
int keep;
#ifdef TCP_NODELAY
int nodelay;
#endif
int ended;
int in_len;
int in_pad;
fcgi_header *out_hdr;
unsigned char *out_pos;
unsigned char out_buf[1024*8];
unsigned char reserved[sizeof(fcgi_end_request_rec)];
fcgi_req_hook hook;
int has_env;
fcgi_hash env;
};
/* maybe it's better to use weak name instead */
#ifndef HAVE_ATTRIBUTE_WEAK
static fcgi_logger fcgi_log;
#endif
typedef union _sa_t {
struct sockaddr sa;
struct sockaddr_un sa_unix;
struct sockaddr_in sa_inet;
struct sockaddr_in6 sa_inet6;
} sa_t;
static HashTable fcgi_mgmt_vars;
static int is_initialized = 0;
static int is_fastcgi = 0;
static int in_shutdown = 0;
static sa_t *allowed_clients = NULL;
static sa_t client_sa;
/* hash table */
static void fcgi_hash_init(fcgi_hash *h)
{
memset(h->hash_table, 0, sizeof(h->hash_table));
h->list = NULL;
h->buckets = (fcgi_hash_buckets*)malloc(sizeof(fcgi_hash_buckets));
h->buckets->idx = 0;
h->buckets->next = NULL;
h->data = (fcgi_data_seg*)malloc(sizeof(fcgi_data_seg) - 1 + FCGI_HASH_SEG_SIZE);
h->data->pos = h->data->data;
h->data->end = h->data->pos + FCGI_HASH_SEG_SIZE;
h->data->next = NULL;
}
static void fcgi_hash_destroy(fcgi_hash *h)
{
fcgi_hash_buckets *b;
fcgi_data_seg *p;
b = h->buckets;
while (b) {
fcgi_hash_buckets *q = b;
b = b->next;
free(q);
}
p = h->data;
while (p) {
fcgi_data_seg *q = p;
p = p->next;
free(q);
}
}
static void fcgi_hash_clean(fcgi_hash *h)
{
memset(h->hash_table, 0, sizeof(h->hash_table));
h->list = NULL;
/* delete all bucket blocks except the first one */
while (h->buckets->next) {
fcgi_hash_buckets *q = h->buckets;
h->buckets = h->buckets->next;
free(q);
}
h->buckets->idx = 0;
/* delete all data segments except the first one */
while (h->data->next) {
fcgi_data_seg *q = h->data;
h->data = h->data->next;
free(q);
}
h->data->pos = h->data->data;
}
static inline char* fcgi_hash_strndup(fcgi_hash *h, char *str, unsigned int str_len)
{
char *ret;
if (UNEXPECTED(h->data->pos + str_len + 1 >= h->data->end)) {
unsigned int seg_size = (str_len + 1 > FCGI_HASH_SEG_SIZE) ? str_len + 1 : FCGI_HASH_SEG_SIZE;
fcgi_data_seg *p = (fcgi_data_seg*)malloc(sizeof(fcgi_data_seg) - 1 + seg_size);
p->pos = p->data;
p->end = p->pos + seg_size;
p->next = h->data;
h->data = p;
}
ret = h->data->pos;
memcpy(ret, str, str_len);
ret[str_len] = 0;
h->data->pos += str_len + 1;
return ret;
}
static char* fcgi_hash_set(fcgi_hash *h, unsigned int hash_value, char *var, unsigned int var_len, char *val, unsigned int val_len)
{
unsigned int idx = hash_value & FCGI_HASH_TABLE_MASK;
fcgi_hash_bucket *p = h->hash_table[idx];
while (UNEXPECTED(p != NULL)) {
if (UNEXPECTED(p->hash_value == hash_value) &&
p->var_len == var_len &&
memcmp(p->var, var, var_len) == 0) {
p->val_len = val_len;
p->val = fcgi_hash_strndup(h, val, val_len);
return p->val;
}
p = p->next;
}
if (UNEXPECTED(h->buckets->idx >= FCGI_HASH_TABLE_SIZE)) {
fcgi_hash_buckets *b = (fcgi_hash_buckets*)malloc(sizeof(fcgi_hash_buckets));
b->idx = 0;
b->next = h->buckets;
h->buckets = b;
}
p = h->buckets->data + h->buckets->idx;
h->buckets->idx++;
p->next = h->hash_table[idx];
h->hash_table[idx] = p;
p->list_next = h->list;
h->list = p;
p->hash_value = hash_value;
p->var_len = var_len;
p->var = fcgi_hash_strndup(h, var, var_len);
p->val_len = val_len;
p->val = fcgi_hash_strndup(h, val, val_len);
return p->val;
}
static void fcgi_hash_del(fcgi_hash *h, unsigned int hash_value, char *var, unsigned int var_len)
{
unsigned int idx = hash_value & FCGI_HASH_TABLE_MASK;
fcgi_hash_bucket **p = &h->hash_table[idx];
while (*p != NULL) {
if ((*p)->hash_value == hash_value &&
(*p)->var_len == var_len &&
memcmp((*p)->var, var, var_len) == 0) {
(*p)->val = NULL; /* NULL value means deleted */
(*p)->val_len = 0;
*p = (*p)->next;
return;
}
p = &(*p)->next;
}
}
static char *fcgi_hash_get(fcgi_hash *h, unsigned int hash_value, char *var, unsigned int var_len, unsigned int *val_len)
{
unsigned int idx = hash_value & FCGI_HASH_TABLE_MASK;
fcgi_hash_bucket *p = h->hash_table[idx];
while (p != NULL) {
if (p->hash_value == hash_value &&
p->var_len == var_len &&
memcmp(p->var, var, var_len) == 0) {
*val_len = p->val_len;
return p->val;
}
p = p->next;
}
return NULL;
}
static void fcgi_hash_apply(fcgi_hash *h, fcgi_apply_func func, void *arg)
{
fcgi_hash_bucket *p = h->list;
while (p) {
if (EXPECTED(p->val != NULL)) {
func(p->var, p->var_len, p->val, p->val_len, arg);
}
p = p->list_next;
}
}
#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
void fcgi_set_in_shutdown(int new_value)
{
in_shutdown = new_value;
}
int fcgi_in_shutdown(void)
{
return in_shutdown;
}
void fcgi_terminate(void)
{
in_shutdown = 1;
}
void fcgi_request_set_keep(fcgi_request *req, int new_value)
{
req->keep = new_value;
}
#ifndef HAVE_ATTRIBUTE_WEAK
void fcgi_set_logger(fcgi_logger lg) {
fcgi_log = lg;
}
#else
void __attribute__((weak)) fcgi_log(int type, const char *format, ...) {
va_list ap;
va_start(ap, format);
vfprintf(stderr, format, ap);
va_end(ap);
}
#endif
int fcgi_init(void)
{
if (!is_initialized) {
#ifndef _WIN32
sa_t sa;
socklen_t len = sizeof(sa);
#endif
zend_hash_init(&fcgi_mgmt_vars, 8, 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) {
zend_long ev = ZEND_ATOL(str);
HANDLE shutdown_event = (HANDLE) ev;
if (!CreateThread(NULL, 0, fcgi_shutdown_thread,
shutdown_event, 0, NULL)) {
return -1;
}
}
str = getenv("_FCGI_MUTEX_");
if (str != NULL) {
fcgi_accept_mutex = (HANDLE) ZEND_ATOL(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 {
if (!inet_pton(AF_INET, host, &sa.sa_inet.sin_addr)) {
struct hostent *hep;
if(strlen(host) > MAXFQDNLEN) {
hep = NULL;
} else {
hep = php_network_gethostbyname(host);
}
if (!hep || hep->h_addrtype != AF_INET || !hep->h_addr_list[0]) {
fcgi_log(FCGI_ERROR, "Cannot resolve host name '%s'!\n", host);
return -1;
} else if (hep->h_addr_list[1]) {
fcgi_log(FCGI_ERROR, "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((intptr_t)namedPipe, 0);
if (!is_initialized) {
fcgi_init();
}
is_fastcgi = 1;
return listen_socket;
#else
size_t path_len = strlen(path);
if (path_len >= sizeof(sa.sa_unix.sun_path)) {
fcgi_log(FCGI_ERROR, "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 = XtOffsetOf(struct sockaddr_un, sun_path) + path_len;
#ifdef HAVE_STRUCT_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) {
close(listen_socket);
fcgi_log(FCGI_ERROR, "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(sa_t) * (n+2));
n = 0;
cur = ip;
while (cur) {
end = strchr(cur, ',');
if (end) {
*end = 0;
end++;
}
if (inet_pton(AF_INET, cur, &allowed_clients[n].sa_inet.sin_addr)>0) {
allowed_clients[n].sa.sa_family = AF_INET;
n++;
#ifdef HAVE_IPV6
} else if (inet_pton(AF_INET6, cur, &allowed_clients[n].sa_inet6.sin6_addr)>0) {
allowed_clients[n].sa.sa_family = AF_INET6;
n++;
#endif
} else {
fcgi_log(FCGI_ERROR, "Wrong IP address '%s' in listen.allowed_clients", cur);
}
cur = end;
}
allowed_clients[n].sa.sa_family = 0;
free(ip);
if (!n) {
fcgi_log(FCGI_ERROR, "There are no allowed addresses");
/* don't clear allowed_clients as it will create an "open for all" security issue */
}
}
}
if (!is_initialized) {
fcgi_init();
}
is_fastcgi = 1;
#ifdef _WIN32
if (tcp) {
listen_socket = _open_osfhandle((intptr_t)listen_socket, 0);
}
#else
fcgi_setup_signals();
#endif
return listen_socket;
}
void fcgi_set_allowed_clients(char *ip)
{
char *cur, *end;
int n;
if (ip) {
ip = strdup(ip);
cur = ip;
n = 0;
while (*cur) {
if (*cur == ',') n++;
cur++;
}
if (allowed_clients) free(allowed_clients);
allowed_clients = malloc(sizeof(sa_t) * (n+2));
n = 0;
cur = ip;
while (cur) {
end = strchr(cur, ',');
if (end) {
*end = 0;
end++;
}
if (inet_pton(AF_INET, cur, &allowed_clients[n].sa_inet.sin_addr)>0) {
allowed_clients[n].sa.sa_family = AF_INET;
n++;
#ifdef HAVE_IPV6
} else if (inet_pton(AF_INET6, cur, &allowed_clients[n].sa_inet6.sin6_addr)>0) {
allowed_clients[n].sa.sa_family = AF_INET6;
n++;
#endif
} else {
fcgi_log(FCGI_ERROR, "Wrong IP address '%s' in listen.allowed_clients", cur);
}
cur = end;
}
allowed_clients[n].sa.sa_family = 0;
free(ip);
if (!n) {
fcgi_log(FCGI_ERROR, "There are no allowed addresses");
/* don't clear allowed_clients as it will create an "open for all" security issue */
}
}
}
static void fcgi_hook_dummy(void) {
return;
}
fcgi_request *fcgi_init_request(int listen_socket, void(*on_accept)(void), void(*on_read)(void), void(*on_close)(void))
{
fcgi_request *req = calloc(1, 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;
#ifdef TCP_NODELAY
req->nodelay = 0;
#endif
req->env = NULL;
req->has_env = 0;
*/
req->out_pos = req->out_buf;
req->hook.on_accept = on_accept ? on_accept : fcgi_hook_dummy;
req->hook.on_read = on_read ? on_read : fcgi_hook_dummy;
req->hook.on_close = on_close ? on_close : fcgi_hook_dummy;
#ifdef _WIN32
req->tcp = !GetNamedPipeInfo((HANDLE)_get_osfhandle(req->listen_socket), NULL, NULL, NULL, NULL);
#endif
fcgi_hash_init(&req->env);
return req;
}
void fcgi_destroy_request(fcgi_request *req) {
fcgi_hash_destroy(&req->env);
free(req);
}
static inline ssize_t safe_write(fcgi_request *req, const void *buf, size_t count)
{
int ret;
size_t n = 0;
do {
#ifdef _WIN32
size_t tmp;
#endif
errno = 0;
#ifdef _WIN32
tmp = count - n;
if (!req->tcp) {
unsigned int out_len = tmp > UINT_MAX ? UINT_MAX : (unsigned int)tmp;
ret = write(req->fd, ((char*)buf)+n, out_len);
} else {
int out_len = tmp > INT_MAX ? INT_MAX : (int)tmp;
ret = send(req->fd, ((char*)buf)+n, out_len, 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 {
#ifdef _WIN32
size_t tmp;
#endif
errno = 0;
#ifdef _WIN32
tmp = count - n;
if (!req->tcp) {
unsigned int in_len = tmp > INT_MAX ? INT_MAX : (unsigned int)tmp;
ret = _read(req->fd, ((char*)buf)+n, in_len);
} else {
int in_len = tmp > INT_MAX ? INT_MAX : (int)tmp;
ret = recv(req->fd, ((char*)buf)+n, in_len, 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);
}