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lighttpd1.4/src/mod_fastcgi.c

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<
#include "first.h"
#include "buffer.h"
#include "server.h"
#include "keyvalue.h"
#include "log.h"
#include "http_chunk.h"
#include "fdevent.h"
#include "connections.h"
#include "response.h"
#include "joblist.h"
#include "plugin.h"
#include "inet_ntop_cache.h"
#include "stat_cache.h"
#include "status_counter.h"
#include <sys/types.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include <assert.h>
#include <signal.h>
#ifdef HAVE_FASTCGI_FASTCGI_H
# include <fastcgi/fastcgi.h>
#else
# ifdef HAVE_FASTCGI_H
# include <fastcgi.h>
# else
# include "fastcgi.h"
# endif
#endif /* HAVE_FASTCGI_FASTCGI_H */
#include <stdio.h>
#include "sys-socket.h"
#ifdef HAVE_SYS_UIO_H
#include <sys/uio.h>
#endif
#ifdef HAVE_SYS_WAIT_H
#include <sys/wait.h>
#endif
#include "version.h"
/*
*
* TODO:
*
* - add timeout for a connect to a non-fastcgi process
* (use state_timestamp + state)
*
*/
typedef struct fcgi_proc {
size_t id; /* id will be between 1 and max_procs */
buffer *unixsocket; /* config.socket + "-" + id */
unsigned port; /* config.port + pno */
buffer *connection_name; /* either tcp:<host>:<port> or unix:<socket> for debugging purposes */
pid_t pid; /* PID of the spawned process (0 if not spawned locally) */
size_t load; /* number of requests waiting on this process */
size_t requests; /* see max_requests */
struct fcgi_proc *prev, *next; /* see first */
time_t disabled_until; /* this proc is disabled until, use something else until then */
int is_local;
enum {
PROC_STATE_UNSET, /* init-phase */
PROC_STATE_RUNNING, /* alive */
PROC_STATE_OVERLOADED, /* listen-queue is full,
don't send anything to this proc for the next 2 seconds */
PROC_STATE_DIED_WAIT_FOR_PID, /* */
PROC_STATE_DIED, /* marked as dead, should be restarted */
PROC_STATE_KILLED /* was killed as we don't have the load anymore */
} state;
} fcgi_proc;
typedef struct {
/* the key that is used to reference this value */
buffer *id;
/* list of processes handling this extension
* sorted by lowest load
*
* whenever a job is done move it up in the list
* until it is sorted, move it down as soon as the
* job is started
*/
fcgi_proc *first;
fcgi_proc *unused_procs;
/*
* spawn at least min_procs, at max_procs.
*
* as soon as the load of the first entry
* is max_load_per_proc we spawn a new one
* and add it to the first entry and give it
* the load
*
*/
unsigned short max_procs;
size_t num_procs; /* how many procs are started */
size_t active_procs; /* how many of them are really running, i.e. state = PROC_STATE_RUNNING */
/*
* time after a disabled remote connection is tried to be re-enabled
*
*
*/
unsigned short disable_time;
/*
* some fastcgi processes get a little bit larger
* than wanted. max_requests_per_proc kills a
* process after a number of handled requests.
*
*/
size_t max_requests_per_proc;
/* config */
/*
* host:port
*
* if host is one of the local IP adresses the
* whole connection is local
*
* if port is not 0, and host is not specified,
* "localhost" (INADDR_LOOPBACK) is assumed.
*
*/
buffer *host;
unsigned short port;
/*
* Unix Domain Socket
*
* instead of TCP/IP we can use Unix Domain Sockets
* - more secure (you have fileperms to play with)
* - more control (on locally)
* - more speed (no extra overhead)
*/
buffer *unixsocket;
/* if socket is local we can start the fastcgi
* process ourself
*
* bin-path is the path to the binary
*
* check min_procs and max_procs for the number
* of process to start up
*/
buffer *bin_path;
/* bin-path is set bin-environment is taken to
* create the environement before starting the
* FastCGI process
*
*/
array *bin_env;
array *bin_env_copy;
/*
* docroot-translation between URL->phys and the
* remote host
*
* reasons:
* - different dir-layout if remote
* - chroot if local
*
*/
buffer *docroot;
/*
* fastcgi-mode:
* - responser
* - authorizer
*
*/
unsigned short mode;
/*
* check_local tells you if the phys file is stat()ed
* or not. FastCGI doesn't care if the service is
* remote. If the web-server side doesn't contain
* the fastcgi-files we should not stat() for them
* and say '404 not found'.
*/
unsigned short check_local;
/*
* append PATH_INFO to SCRIPT_FILENAME
*
* php needs this if cgi.fix_pathinfo is provided
*
*/
unsigned short break_scriptfilename_for_php;
/*
* workaround for program when prefix="/"
*
* rule to build PATH_INFO is hardcoded for when check_local is disabled
* enable this option to use the workaround
*
*/
unsigned short fix_root_path_name;
/*
* If the backend includes X-LIGHTTPD-send-file in the response
* we use the value as filename and ignore the content.
*
*/
unsigned short allow_xsendfile;
ssize_t load; /* replace by host->load */
size_t max_id; /* corresponds most of the time to
num_procs.
only if a process is killed max_id waits for the process itself
to die and decrements it afterwards */
buffer *strip_request_uri;
unsigned short kill_signal; /* we need a setting for this as libfcgi
applications prefer SIGUSR1 while the
rest of the world would use SIGTERM
*sigh* */
int listen_backlog;
} fcgi_extension_host;
/*
* one extension can have multiple hosts assigned
* one host can spawn additional processes on the same
* socket (if we control it)
*
* ext -> host -> procs
* 1:n 1:n
*
* if the fastcgi process is remote that whole goes down
* to
*
* ext -> host -> procs
* 1:n 1:1
*
* in case of PHP and FCGI_CHILDREN we have again a procs
* but we don't control it directly.
*
*/
typedef struct {
buffer *key; /* like .php */
int note_is_sent;
int last_used_ndx;
fcgi_extension_host **hosts;
size_t used;
size_t size;
} fcgi_extension;
typedef struct {
fcgi_extension **exts;
size_t used;
size_t size;
} fcgi_exts;
typedef struct {
fcgi_exts *exts;
array *ext_mapping;
unsigned int debug;
} plugin_config;
typedef struct {
char **ptr;
size_t size;
size_t used;
} char_array;
/* generic plugin data, shared between all connections */
typedef struct {
PLUGIN_DATA;
buffer *fcgi_env;
buffer *path;
buffer *statuskey;
plugin_config **config_storage;
plugin_config conf; /* this is only used as long as no handler_ctx is setup */
} plugin_data;
/* connection specific data */
typedef enum {
FCGI_STATE_INIT,
FCGI_STATE_CONNECT_DELAYED,
FCGI_STATE_PREPARE_WRITE,
FCGI_STATE_WRITE,
FCGI_STATE_READ
} fcgi_connection_state_t;
typedef struct {
fcgi_proc *proc;
fcgi_extension_host *host;
fcgi_extension *ext;
fcgi_connection_state_t state;
time_t state_timestamp;
int reconnects; /* number of reconnect attempts */
chunkqueue *rb; /* read queue */
chunkqueue *wb; /* write queue */
buffer *response_header;
size_t request_id;
int fd; /* fd to the fastcgi process */
int fde_ndx; /* index into the fd-event buffer */
pid_t pid;
int got_proc;
int send_content_body;
plugin_config conf;
connection *remote_conn; /* dumb pointer */
plugin_data *plugin_data; /* dumb pointer */
} handler_ctx;
/* ok, we need a prototype */
static handler_t fcgi_handle_fdevent(server *srv, void *ctx, int revents);
static void reset_signals(void) {
#ifdef SIGTTOU
signal(SIGTTOU, SIG_DFL);
#endif
#ifdef SIGTTIN
signal(SIGTTIN, SIG_DFL);
#endif
#ifdef SIGTSTP
signal(SIGTSTP, SIG_DFL);
#endif
signal(SIGHUP, SIG_DFL);
signal(SIGPIPE, SIG_DFL);
signal(SIGUSR1, SIG_DFL);
}
static void fastcgi_status_copy_procname(buffer *b, fcgi_extension_host *host, fcgi_proc *proc) {
buffer_copy_string_len(b, CONST_STR_LEN("fastcgi.backend."));
buffer_append_string_buffer(b, host->id);
if (proc) {
buffer_append_string_len(b, CONST_STR_LEN("."));
buffer_append_int(b, proc->id);
}
}
static void fcgi_proc_load_inc(server *srv, handler_ctx *hctx) {
plugin_data *p = hctx->plugin_data;
hctx->proc->load++;
status_counter_inc(srv, CONST_STR_LEN("fastcgi.active-requests"));
fastcgi_status_copy_procname(p->statuskey, hctx->host, hctx->proc);
buffer_append_string_len(p->statuskey, CONST_STR_LEN(".load"));
status_counter_set(srv, CONST_BUF_LEN(p->statuskey), hctx->proc->load);
}
static void fcgi_proc_load_dec(server *srv, handler_ctx *hctx) {
plugin_data *p = hctx->plugin_data;
hctx->proc->load--;
status_counter_dec(srv, CONST_STR_LEN("fastcgi.active-requests"));
fastcgi_status_copy_procname(p->statuskey, hctx->host, hctx->proc);
buffer_append_string_len(p->statuskey, CONST_STR_LEN(".load"));
status_counter_set(srv, CONST_BUF_LEN(p->statuskey), hctx->proc->load);
}
static void fcgi_host_assign(server *srv, handler_ctx *hctx, fcgi_extension_host *host) {
plugin_data *p = hctx->plugin_data;
hctx->host = host;
hctx->host->load++;
fastcgi_status_copy_procname(p->statuskey, hctx->host, NULL);
buffer_append_string_len(p->statuskey, CONST_STR_LEN(".load"));
status_counter_set(srv, CONST_BUF_LEN(p->statuskey), hctx->host->load);
}
static void fcgi_host_reset(server *srv, handler_ctx *hctx) {
plugin_data *p = hctx->plugin_data;
hctx->host->load--;
fastcgi_status_copy_procname(p->statuskey, hctx->host, NULL);
buffer_append_string_len(p->statuskey, CONST_STR_LEN(".load"));
status_counter_set(srv, CONST_BUF_LEN(p->statuskey), hctx->host->load);
hctx->host = NULL;
}
static void fcgi_host_disable(server *srv, handler_ctx *hctx) {
plugin_data *p = hctx->plugin_data;
if (hctx->host->disable_time || hctx->proc->is_local) {
if (hctx->proc->state == PROC_STATE_RUNNING) hctx->host->active_procs--;
hctx->proc->disabled_until = srv->cur_ts + hctx->host->disable_time;
hctx->proc->state = hctx->proc->is_local ? PROC_STATE_DIED_WAIT_FOR_PID : PROC_STATE_DIED;
if (p->conf.debug) {
log_error_write(srv, __FILE__, __LINE__, "sds",
"backend disabled for", hctx->host->disable_time, "seconds");
}
}
}
static int fastcgi_status_init(server *srv, buffer *b, fcgi_extension_host *host, fcgi_proc *proc) {
#define CLEAN(x) \
fastcgi_status_copy_procname(b, host, proc); \
buffer_append_string_len(b, CONST_STR_LEN(x)); \
status_counter_set(srv, CONST_BUF_LEN(b), 0);
CLEAN(".disabled");
CLEAN(".died");
CLEAN(".overloaded");
CLEAN(".connected");
CLEAN(".load");
#undef CLEAN
#define CLEAN(x) \
fastcgi_status_copy_procname(b, host, NULL); \
buffer_append_string_len(b, CONST_STR_LEN(x)); \
status_counter_set(srv, CONST_BUF_LEN(b), 0);
CLEAN(".load");
#undef CLEAN
return 0;
}
static handler_ctx * handler_ctx_init(void) {
handler_ctx * hctx;
hctx = calloc(1, sizeof(*hctx));
force_assert(hctx);
hctx->fde_ndx = -1;
hctx->response_header = buffer_init();
hctx->request_id = 0;
hctx->state = FCGI_STATE_INIT;
hctx->proc = NULL;
hctx->fd = -1;
hctx->reconnects = 0;
hctx->send_content_body = 1;
hctx->rb = chunkqueue_init();
hctx->wb = chunkqueue_init();
return hctx;
}
static void handler_ctx_free(server *srv, handler_ctx *hctx) {
if (hctx->host) {
fcgi_host_reset(srv, hctx);
}
buffer_free(hctx->response_header);
chunkqueue_free(hctx->rb);
chunkqueue_free(hctx->wb);
free(hctx);
}
static fcgi_proc *fastcgi_process_init(void) {
fcgi_proc *f;
f = calloc(1, sizeof(*f));
f->unixsocket = buffer_init();
f->connection_name = buffer_init();
f->prev = NULL;
f->next = NULL;
return f;
}
static void fastcgi_process_free(fcgi_proc *f) {
if (!f) return;
fastcgi_process_free(f->next);
buffer_free(f->unixsocket);
buffer_free(f->connection_name);
free(f);
}
static fcgi_extension_host *fastcgi_host_init(void) {
fcgi_extension_host *f;
f = calloc(1, sizeof(*f));
f->id = buffer_init();
f->host = buffer_init();
f->unixsocket = buffer_init();
f->docroot = buffer_init();
f->bin_path = buffer_init();
f->bin_env = array_init();
f->bin_env_copy = array_init();
f->strip_request_uri = buffer_init();
return f;
}
static void fastcgi_host_free(fcgi_extension_host *h) {
if (!h) return;
buffer_free(h->id);
buffer_free(h->host);
buffer_free(h->unixsocket);
buffer_free(h->docroot);
buffer_free(h->bin_path);
buffer_free(h->strip_request_uri);
array_free(h->bin_env);
array_free(h->bin_env_copy);
fastcgi_process_free(h->first);
fastcgi_process_free(h->unused_procs);
free(h);
}
static fcgi_exts *fastcgi_extensions_init(void) {
fcgi_exts *f;
f = calloc(1, sizeof(*f));
return f;
}
static void fastcgi_extensions_free(fcgi_exts *f) {
size_t i;
if (!f) return;
for (i = 0; i < f->used; i++) {
fcgi_extension *fe;
size_t j;
fe = f->exts[i];
for (j = 0; j < fe->used; j++) {
fcgi_extension_host *h;
h = fe->hosts[j];
fastcgi_host_free(h);
}
buffer_free(fe->key);
free(fe->hosts);
free(fe);
}
free(f->exts);
free(f);
}
static int fastcgi_extension_insert(fcgi_exts *ext, buffer *key, fcgi_extension_host *fh) {
fcgi_extension *fe;
size_t i;
/* there is something */
for (i = 0; i < ext->used; i++) {
if (buffer_is_equal(key, ext->exts[i]->key)) {
break;
}
}
if (i == ext->used) {
/* filextension is new */
fe = calloc(1, sizeof(*fe));
force_assert(fe);
fe->key = buffer_init();
fe->last_used_ndx = -1;
buffer_copy_buffer(fe->key, key);
/* */
if (ext->size == 0) {
ext->size = 8;
ext->exts = malloc(ext->size * sizeof(*(ext->exts)));
force_assert(ext->exts);
} else if (ext->used == ext->size) {
ext->size += 8;
ext->exts = realloc(ext->exts, ext->size * sizeof(*(ext->exts)));
force_assert(ext->exts);
}
ext->exts[ext->used++] = fe;
} else {
fe = ext->exts[i];
}
if (fe->size == 0) {
fe->size = 4;
fe->hosts = malloc(fe->size * sizeof(*(fe->hosts)));
force_assert(fe->hosts);
} else if (fe->size == fe->used) {
fe->size += 4;
fe->hosts = realloc(fe->hosts, fe->size * sizeof(*(fe->hosts)));
force_assert(fe->hosts);
}
fe->hosts[fe->used++] = fh;
return 0;
}
INIT_FUNC(mod_fastcgi_init) {
plugin_data *p;
p = calloc(1, sizeof(*p));
p->fcgi_env = buffer_init();
p->path = buffer_init();
p->statuskey = buffer_init();
return p;
}
FREE_FUNC(mod_fastcgi_free) {
plugin_data *p = p_d;
UNUSED(srv);
buffer_free(p->fcgi_env);
buffer_free(p->path);
buffer_free(p->statuskey);
if (p->config_storage) {
size_t i, j, n;
for (i = 0; i < srv->config_context->used; i++) {
plugin_config *s = p->config_storage[i];
fcgi_exts *exts;
if (NULL == s) continue;
exts = s->exts;
for (j = 0; j < exts->used; j++) {
fcgi_extension *ex;
ex = exts->exts[j];
for (n = 0; n < ex->used; n++) {
fcgi_proc *proc;
fcgi_extension_host *host;
host = ex->hosts[n];
for (proc = host->first; proc; proc = proc->next) {
if (proc->pid != 0) {
kill(proc->pid, host->kill_signal);
}
if (proc->is_local &&
!buffer_string_is_empty(proc->unixsocket)) {
unlink(proc->unixsocket->ptr);
}
}
for (proc = host->unused_procs; proc; proc = proc->next) {
if (proc->pid != 0) {
kill(proc->pid, host->kill_signal);
}
if (proc->is_local &&
!buffer_string_is_empty(proc->unixsocket)) {
unlink(proc->unixsocket->ptr);
}
}
}
}
fastcgi_extensions_free(s->exts);
array_free(s->ext_mapping);
free(s);
}
free(p->config_storage);
}
free(p);
return HANDLER_GO_ON;
}
static int env_add(char_array *env, const char *key, size_t key_len, const char *val, size_t val_len) {
char *dst;
size_t i;
if (!key || !val) return -1;
dst = malloc(key_len + val_len + 3);
memcpy(dst, key, key_len);
dst[key_len] = '=';
memcpy(dst + key_len + 1, val, val_len);
dst[key_len + 1 + val_len] = '\0';
for (i = 0; i < env->used; i++) {
if (0 == strncmp(dst, env->ptr[i], key_len + 1)) {
/* don't care about free as we are in a forked child which is going to exec(...) */
/* free(env->ptr[i]); */
env->ptr[i] = dst;
return 0;
}
}
if (env->size == 0) {
env->size = 16;
env->ptr = malloc(env->size * sizeof(*env->ptr));
} else if (env->size == env->used + 1) {
env->size += 16;
env->ptr = realloc(env->ptr, env->size * sizeof(*env->ptr));
}
env->ptr[env->used++] = dst;
return 0;
}
static int parse_binpath(char_array *env, buffer *b) {
char *start;
size_t i;
/* search for spaces */
start = b->ptr;
for (i = 0; i < buffer_string_length(b); i++) {
switch(b->ptr[i]) {
case ' ':
case '\t':
/* a WS, stop here and copy the argument */
if (env->size == 0) {
env->size = 16;
env->ptr = malloc(env->size * sizeof(*env->ptr));
} else if (env->size == env->used) {
env->size += 16;
env->ptr = realloc(env->ptr, env->size * sizeof(*env->ptr));
}
b->ptr[i] = '\0';
env->ptr[env->used++] = start;
start = b->ptr + i + 1;
break;
default:
break;
}
}
if (env->size == 0) {
env->size = 16;
env->ptr = malloc(env->size * sizeof(*env->ptr));
} else if (env->size == env->used) { /* we need one extra for the terminating NULL */
env->size += 16;
env->ptr = realloc(env->ptr, env->size * sizeof(*env->ptr));
}
/* the rest */
env->ptr[env->used++] = start;
if (env->size == 0) {
env->size = 16;
env->ptr = malloc(env->size * sizeof(*env->ptr));
} else if (env->size == env->used) { /* we need one extra for the terminating NULL */
env->size += 16;
env->ptr = realloc(env->ptr, env->size * sizeof(*env->ptr));
}
/* terminate */
env->ptr[env->used++] = NULL;
return 0;
}
#if !defined(HAVE_FORK)
static int fcgi_spawn_connection(server *srv,
plugin_data *p,
fcgi_extension_host *host,
fcgi_proc *proc) {
UNUSED(srv);
UNUSED(p);
UNUSED(host);
UNUSED(proc);
return -1;
}
#else /* -> defined(HAVE_FORK) */
static int fcgi_spawn_connection(server *srv,
plugin_data *p,
fcgi_extension_host *host,
fcgi_proc *proc) {
int fcgi_fd;
int socket_type, status;
struct timeval tv = { 0, 100 * 1000 };
#ifdef HAVE_SYS_UN_H
struct sockaddr_un fcgi_addr_un;
#endif
struct sockaddr_in fcgi_addr_in;
struct sockaddr *fcgi_addr;
socklen_t servlen;
if (p->conf.debug) {
log_error_write(srv, __FILE__, __LINE__, "sdb",
"new proc, socket:", proc->port, proc->unixsocket);
}
if (!buffer_string_is_empty(proc->unixsocket)) {
#ifdef HAVE_SYS_UN_H
memset(&fcgi_addr_un, 0, sizeof(fcgi_addr_un));
fcgi_addr_un.sun_family = AF_UNIX;
if (buffer_string_length(proc->unixsocket) + 1 > sizeof(fcgi_addr_un.sun_path)) {
log_error_write(srv, __FILE__, __LINE__, "sB",
"ERROR: Unix Domain socket filename too long:",
proc->unixsocket);
return -1;
}
memcpy(fcgi_addr_un.sun_path, proc->unixsocket->ptr, buffer_string_length(proc->unixsocket) + 1);
#ifdef SUN_LEN
servlen = SUN_LEN(&fcgi_addr_un);
#else
/* stevens says: */
servlen = buffer_string_length(proc->unixsocket) + 1 + sizeof(fcgi_addr_un.sun_family);
#endif
socket_type = AF_UNIX;
fcgi_addr = (struct sockaddr *) &fcgi_addr_un;
buffer_copy_string_len(proc->connection_name, CONST_STR_LEN("unix:"));
buffer_append_string_buffer(proc->connection_name, proc->unixsocket);
#else
log_error_write(srv, __FILE__, __LINE__, "s",
"ERROR: Unix Domain sockets are not supported.");
return -1;
#endif
} else {
memset(&fcgi_addr_in, 0, sizeof(fcgi_addr_in));
fcgi_addr_in.sin_family = AF_INET;
if (buffer_string_is_empty(host->host)) {
fcgi_addr_in.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
} else {
struct hostent *he;
/* set a useful default */
fcgi_addr_in.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
if (NULL == (he = gethostbyname(host->host->ptr))) {
log_error_write(srv, __FILE__, __LINE__,
"sdb", "gethostbyname failed: ",
h_errno, host->host);
return -1;
}
if (he->h_addrtype != AF_INET) {
log_error_write(srv, __FILE__, __LINE__, "sd", "addr-type != AF_INET: ", he->h_addrtype);
return -1;
}
if (he->h_length != sizeof(struct in_addr)) {
log_error_write(srv, __FILE__, __LINE__, "sd", "addr-length != sizeof(in_addr): ", he->h_length);
return -1;
}
memcpy(&(fcgi_addr_in.sin_addr.s_addr), he->h_addr_list[0], he->h_length);
}
fcgi_addr_in.sin_port = htons(proc->port);
servlen = sizeof(fcgi_addr_in);
socket_type = AF_INET;
fcgi_addr = (struct sockaddr *) &fcgi_addr_in;
buffer_copy_string_len(proc->connection_name, CONST_STR_LEN("tcp:"));
if (!buffer_string_is_empty(host->host)) {
buffer_append_string_buffer(proc->connection_name, host->host);
} else {
buffer_append_string_len(proc->connection_name, CONST_STR_LEN("localhost"));
}
buffer_append_string_len(proc->connection_name, CONST_STR_LEN(":"));
buffer_append_int(proc->connection_name, proc->port);
}
if (-1 == (fcgi_fd = socket(socket_type, SOCK_STREAM, 0))) {
log_error_write(srv, __FILE__, __LINE__, "ss",
"failed:", strerror(errno));
return -1;
}
if (-1 == connect(fcgi_fd, fcgi_addr, servlen)) {
/* server is not up, spawn it */
pid_t child;
int val;
if (errno != ENOENT &&
!buffer_string_is_empty(proc->unixsocket)) {
unlink(proc->unixsocket->ptr);
}
close(fcgi_fd);
/* reopen socket */
if (-1 == (fcgi_fd = socket(socket_type, SOCK_STREAM, 0))) {
log_error_write(srv, __FILE__, __LINE__, "ss",
"socket failed:", strerror(errno));
return -1;
}
val = 1;
if (setsockopt(fcgi_fd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val)) < 0) {
log_error_write(srv, __FILE__, __LINE__, "ss",
"socketsockopt failed:", strerror(errno));
close(fcgi_fd);
return -1;
}
/* create socket */
if (-1 == bind(fcgi_fd, fcgi_addr, servlen)) {
log_error_write(srv, __FILE__, __LINE__, "sbs",
"bind failed for:",
proc->connection_name,
strerror(errno));
close(fcgi_fd);
return -1;
}
if (-1 == listen(fcgi_fd, host->listen_backlog)) {
log_error_write(srv, __FILE__, __LINE__, "ss",
"listen failed:", strerror(errno));
close(fcgi_fd);
return -1;
}
switch ((child = fork())) {
case 0: {
size_t i = 0;
char *c;
char_array env;
char_array arg;
/* create environment */
env.ptr = NULL;
env.size = 0;
env.used = 0;
arg.ptr = NULL;
arg.size = 0;
arg.used = 0;
if(fcgi_fd != FCGI_LISTENSOCK_FILENO) {
close(FCGI_LISTENSOCK_FILENO);
dup2(fcgi_fd, FCGI_LISTENSOCK_FILENO);
close(fcgi_fd);
}
/* we don't need the client socket */
for (i = 3; i < 256; i++) {
close(i);
}
/* build clean environment */
if (host->bin_env_copy->used) {
for (i = 0; i < host->bin_env_copy->used; i++) {
data_string *ds = (data_string *)host->bin_env_copy->data[i];
char *ge;
if (NULL != (ge = getenv(ds->value->ptr))) {
env_add(&env, CONST_BUF_LEN(ds->value), ge, strlen(ge));
}
}
} else {
char ** const e = environ;
for (i = 0; e[i]; ++i) {
char *eq;
if (NULL != (eq = strchr(e[i], '='))) {
env_add(&env, e[i], eq - e[i], eq+1, strlen(eq+1));
}
}
}
/* create environment */
for (i = 0; i < host->bin_env->used; i++) {
data_string *ds = (data_string *)host->bin_env->data[i];
env_add(&env, CONST_BUF_LEN(ds->key), CONST_BUF_LEN(ds->value));
}
for (i = 0; i < env.used; i++) {
/* search for PHP_FCGI_CHILDREN */
if (0 == strncmp(env.ptr[i], "PHP_FCGI_CHILDREN=", sizeof("PHP_FCGI_CHILDREN=") - 1)) break;
}
/* not found, add a default */
if (i == env.used) {
env_add(&env, CONST_STR_LEN("PHP_FCGI_CHILDREN"), CONST_STR_LEN("1"));
}
env.ptr[env.used] = NULL;
parse_binpath(&arg, host->bin_path);
/* chdir into the base of the bin-path,
* search for the last / */
if (NULL != (c = strrchr(arg.ptr[0], '/'))) {
*c = '\0';
/* change to the physical directory */
if (-1 == chdir(arg.ptr[0])) {
*c = '/';
log_error_write(srv, __FILE__, __LINE__, "sss", "chdir failed:", strerror(errno), arg.ptr[0]);
}
*c = '/';
}
reset_signals();
/* exec the cgi */
execve(arg.ptr[0], arg.ptr, env.ptr);
/* log_error_write(srv, __FILE__, __LINE__, "sbs",
"execve failed for:", host->bin_path, strerror(errno)); */
_exit(errno);
break;
}
case -1:
/* error */
close(fcgi_fd);
break;
default:
/* father */
close(fcgi_fd);
/* wait */
select(0, NULL, NULL, NULL, &tv);
switch (waitpid(child, &status, WNOHANG)) {
case 0:
/* child still running after timeout, good */
break;
case -1:
/* no PID found ? should never happen */
log_error_write(srv, __FILE__, __LINE__, "ss",
"pid not found:", strerror(errno));
return -1;
default:
log_error_write(srv, __FILE__, __LINE__, "sbs",
"the fastcgi-backend", host->bin_path, "failed to start:");
/* the child should not terminate at all */
if (WIFEXITED(status)) {
log_error_write(srv, __FILE__, __LINE__, "sdb",
"child exited with status",
WEXITSTATUS(status), host->bin_path);
log_error_write(srv, __FILE__, __LINE__, "s",
"If you're trying to run your app as a FastCGI backend, make sure you're using the FastCGI-enabled version.\n"
"If this is PHP on Gentoo, add 'fastcgi' to the USE flags.");
} else if (WIFSIGNALED(status)) {
log_error_write(srv, __FILE__, __LINE__, "sd",
"terminated by signal:",
WTERMSIG(status));
if (WTERMSIG(status) == 11) {
log_error_write(srv, __FILE__, __LINE__, "s",
"to be exact: it segfaulted, crashed, died, ... you get the idea." );
log_error_write(srv, __FILE__, __LINE__, "s",
"If this is PHP, try removing the bytecode caches for now and try again.");
}
} else {
log_error_write(srv, __FILE__, __LINE__, "sd",
"child died somehow:",
status);
}
return -1;
}
/* register process */
proc->pid = child;
proc->is_local = 1;
break;
}
} else {
close(fcgi_fd);
proc->is_local = 0;
proc->pid = 0;
if (p->conf.debug) {
log_error_write(srv, __FILE__, __LINE__, "sb",
"(debug) socket is already used; won't spawn:",
proc->connection_name);
}
}
proc->state = PROC_STATE_RUNNING;
host->active_procs++;
return 0;
}
#endif /* HAVE_FORK */
static int unixsocket_is_dup(plugin_data *p, size_t used, buffer *unixsocket) {
size_t i, j, n;
for (i = 0; i < used; ++i) {
fcgi_exts *exts = p->config_storage[i]->exts;
for (j = 0; j < exts->used; ++j) {
fcgi_extension *ex = exts->exts[j];
for (n = 0; n < ex->used; ++n) {
fcgi_extension_host *host = ex->hosts[n];
if (!buffer_string_is_empty(host->unixsocket)
&& buffer_is_equal(host->unixsocket, unixsocket))
return 1;
}
}
}
return 0;
}
SETDEFAULTS_FUNC(mod_fastcgi_set_defaults) {
plugin_data *p = p_d;
data_unset *du;
size_t i = 0;
buffer *fcgi_mode = buffer_init();
fcgi_extension_host *host = NULL;
config_values_t cv[] = {
{ "fastcgi.server", NULL, T_CONFIG_LOCAL, T_CONFIG_SCOPE_CONNECTION }, /* 0 */
{ "fastcgi.debug", NULL, T_CONFIG_INT , T_CONFIG_SCOPE_CONNECTION }, /* 1 */
{ "fastcgi.map-extensions", NULL, T_CONFIG_ARRAY, T_CONFIG_SCOPE_CONNECTION }, /* 2 */
{ NULL, NULL, T_CONFIG_UNSET, T_CONFIG_SCOPE_UNSET }
};
p->config_storage = calloc(1, srv->config_context->used * sizeof(plugin_config *));
for (i = 0; i < srv->config_context->used; i++) {
data_config const* config = (data_config const*)srv->config_context->data[i];
plugin_config *s;
s = malloc(sizeof(plugin_config));
s->exts = fastcgi_extensions_init();
s->debug = 0;
s->ext_mapping = array_init();
cv[0].destination = s->exts;
cv[1].destination = &(s->debug);
cv[2].destination = s->ext_mapping;
p->config_storage[i] = s;
if (0 != config_insert_values_global(srv, config->value, cv, i == 0 ? T_CONFIG_SCOPE_SERVER : T_CONFIG_SCOPE_CONNECTION)) {
goto error;
}
/*
* <key> = ( ... )
*/
if (NULL != (du = array_get_element(config->value, "fastcgi.server"))) {
size_t j;
data_array *da = (data_array *)du;
if (du->type != TYPE_ARRAY) {
log_error_write(srv, __FILE__, __LINE__, "sss",
"unexpected type for key: ", "fastcgi.server", "expected ( \"ext\" => ( \"backend-label\" => ( \"key\" => \"value\" )))");
goto error;
}
/*
* fastcgi.server = ( "<ext>" => ( ... ),
* "<ext>" => ( ... ) )
*/
for (j = 0; j < da->value->used; j++) {
size_t n;
data_array *da_ext = (data_array *)da->value->data[j];
if (da->value->data[j]->type != TYPE_ARRAY) {
log_error_write(srv, __FILE__, __LINE__, "sssbs",
"unexpected type for key: ", "fastcgi.server",
"[", da->value->data[j]->key, "](string); expected ( \"ext\" => ( \"backend-label\" => ( \"key\" => \"value\" )))");
goto error;
}
/*
* da_ext->key == name of the extension
*/
/*
* fastcgi.server = ( "<ext>" =>
* ( "<host>" => ( ... ),
* "<host>" => ( ... )
* ),
* "<ext>" => ... )
*/
for (n = 0; n < da_ext->value->used; n++) {
data_array *da_host = (data_array *)da_ext->value->data[n];
config_values_t fcv[] = {
{ "host", NULL, T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION }, /* 0 */
{ "docroot", NULL, T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION }, /* 1 */
{ "mode", NULL, T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION }, /* 2 */
{ "socket", NULL, T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION }, /* 3 */
{ "bin-path", NULL, T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION }, /* 4 */
{ "check-local", NULL, T_CONFIG_BOOLEAN, T_CONFIG_SCOPE_CONNECTION }, /* 5 */
{ "port", NULL, T_CONFIG_SHORT, T_CONFIG_SCOPE_CONNECTION }, /* 6 */
{ "max-procs", NULL, T_CONFIG_SHORT, T_CONFIG_SCOPE_CONNECTION }, /* 7 */
{ "disable-time", NULL, T_CONFIG_SHORT, T_CONFIG_SCOPE_CONNECTION }, /* 8 */
{ "bin-environment", NULL, T_CONFIG_ARRAY, T_CONFIG_SCOPE_CONNECTION }, /* 9 */
{ "bin-copy-environment", NULL, T_CONFIG_ARRAY, T_CONFIG_SCOPE_CONNECTION }, /* 10 */
{ "broken-scriptfilename", NULL, T_CONFIG_BOOLEAN, T_CONFIG_SCOPE_CONNECTION }, /* 11 */
{ "allow-x-send-file", NULL, T_CONFIG_BOOLEAN, T_CONFIG_SCOPE_CONNECTION }, /* 12 */
{ "strip-request-uri", NULL, T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION }, /* 13 */
{ "kill-signal", NULL, T_CONFIG_SHORT, T_CONFIG_SCOPE_CONNECTION }, /* 14 */
{ "fix-root-scriptname", NULL, T_CONFIG_BOOLEAN, T_CONFIG_SCOPE_CONNECTION }, /* 15 */
{ "listen-backlog", NULL, T_CONFIG_INT, T_CONFIG_SCOPE_CONNECTION }, /* 16 */
{ NULL, NULL, T_CONFIG_UNSET, T_CONFIG_SCOPE_UNSET }
};
if (da_host->type != TYPE_ARRAY) {
log_error_write(srv, __FILE__, __LINE__, "ssSBS",
"unexpected type for key:",
"fastcgi.server",
"[", da_host->key, "](string); expected ( \"ext\" => ( \"backend-label\" => ( \"key\" => \"value\" )))");
goto error;
}
host = fastcgi_host_init();
buffer_reset(fcgi_mode);
buffer_copy_buffer(host->id, da_host->key);
host->check_local = 1;
host->max_procs = 4;
host->mode = FCGI_RESPONDER;
host->disable_time = 1;
host->break_scriptfilename_for_php = 0;
host->allow_xsendfile = 0; /* handle X-LIGHTTPD-send-file */
host->kill_signal = SIGTERM;
host->fix_root_path_name = 0;
host->listen_backlog = 1024;
fcv[0].destination = host->host;
fcv[1].destination = host->docroot;
fcv[2].destination = fcgi_mode;
fcv[3].destination = host->unixsocket;
fcv[4].destination = host->bin_path;
fcv[5].destination = &(host->check_local);
fcv[6].destination = &(host->port);
fcv[7].destination = &(host->max_procs);
fcv[8].destination = &(host->disable_time);
fcv[9].destination = host->bin_env;
fcv[10].destination = host->bin_env_copy;
fcv[11].destination = &(host->break_scriptfilename_for_php);
fcv[12].destination = &(host->allow_xsendfile);
fcv[13].destination = host->strip_request_uri;
fcv[14].destination = &(host->kill_signal);
fcv[15].destination = &(host->fix_root_path_name);
fcv[16].destination = &(host->listen_backlog);
if (0 != config_insert_values_internal(srv, da_host->value, fcv, T_CONFIG_SCOPE_CONNECTION)) {
goto error;
}
if ((!buffer_string_is_empty(host->host) || host->port) &&
!buffer_string_is_empty(host->unixsocket)) {
log_error_write(srv, __FILE__, __LINE__, "sbsbsbs",
"either host/port or socket have to be set in:",
da->key, "= (",
da_ext->key, " => (",
da_host->key, " ( ...");
goto error;
}
if (!buffer_string_is_empty(host->unixsocket)) {
/* unix domain socket */
struct sockaddr_un un;
if (buffer_string_length(host->unixsocket) + 1 > sizeof(un.sun_path) - 2) {
log_error_write(srv, __FILE__, __LINE__, "sbsbsbs",
"unixsocket is too long in:",
da->key, "= (",
da_ext->key, " => (",
da_host->key, " ( ...");
goto error;
}
if (!buffer_string_is_empty(host->bin_path)
&& unixsocket_is_dup(p, i+1, host->unixsocket)) {
log_error_write(srv, __FILE__, __LINE__, "sb",
"duplicate unixsocket path:",
host->unixsocket);
goto error;
}
} else {
/* tcp/ip */
if (buffer_string_is_empty(host->host) &&
buffer_string_is_empty(host->bin_path)) {
log_error_write(srv, __FILE__, __LINE__, "sbsbsbs",
"host or binpath have to be set in:",
da->key, "= (",
da_ext->key, " => (",
da_host->key, " ( ...");
goto error;
} else if (host->port == 0) {
log_error_write(srv, __FILE__, __LINE__, "sbsbsbs",
"port has to be set in:",
da->key, "= (",
da_ext->key, " => (",
da_host->key, " ( ...");
goto error;
}
}
if (!buffer_string_is_empty(host->bin_path)) {
/* a local socket + self spawning */
size_t pno;
if (s->debug) {
log_error_write(srv, __FILE__, __LINE__, "ssbsdsbsd",
"--- fastcgi spawning local",
"\n\tproc:", host->bin_path,
"\n\tport:", host->port,
"\n\tsocket", host->unixsocket,
"\n\tmax-procs:", host->max_procs);
}
for (pno = 0; pno < host->max_procs; pno++) {
fcgi_proc *proc;
proc = fastcgi_process_init();
proc->id = host->num_procs++;
host->max_id++;
if (buffer_string_is_empty(host->unixsocket)) {
proc->port = host->port + pno;
} else {
buffer_copy_buffer(proc->unixsocket, host->unixsocket);
buffer_append_string_len(proc->unixsocket, CONST_STR_LEN("-"));
buffer_append_int(proc->unixsocket, pno);
}
if (s->debug) {
log_error_write(srv, __FILE__, __LINE__, "ssdsbsdsd",
"--- fastcgi spawning",
"\n\tport:", host->port,
"\n\tsocket", host->unixsocket,
"\n\tcurrent:", pno, "/", host->max_procs);
}
if (!srv->srvconf.preflight_check
&& fcgi_spawn_connection(srv, p, host, proc)) {
log_error_write(srv, __FILE__, __LINE__, "s",
"[ERROR]: spawning fcgi failed.");
fastcgi_process_free(proc);
goto error;
}
fastcgi_status_init(srv, p->statuskey, host, proc);
proc->next = host->first;
if (host->first) host->first->prev = proc;
host->first = proc;
}
} else {
fcgi_proc *proc;
proc = fastcgi_process_init();
proc->id = host->num_procs++;
host->max_id++;
host->active_procs++;
proc->state = PROC_STATE_RUNNING;
if (buffer_string_is_empty(host->unixsocket)) {
proc->port = host->port;
} else {
buffer_copy_buffer(proc->unixsocket, host->unixsocket);
}
fastcgi_status_init(srv, p->statuskey, host, proc);
host->first = proc;
host->max_procs = 1;
}
if (!buffer_string_is_empty(fcgi_mode)) {
if (strcmp(fcgi_mode->ptr, "responder") == 0) {
host->mode = FCGI_RESPONDER;
} else if (strcmp(fcgi_mode->ptr, "authorizer") == 0) {
host->mode = FCGI_AUTHORIZER;
if (buffer_string_is_empty(host->docroot)) {
log_error_write(srv, __FILE__, __LINE__, "s",
"ERROR: docroot is required for authorizer mode.");
goto error;
}
} else {
log_error_write(srv, __FILE__, __LINE__, "sbs",
"WARNING: unknown fastcgi mode:",
fcgi_mode, "(ignored, mode set to responder)");
}
}
/* if extension already exists, take it */
fastcgi_extension_insert(s->exts, da_ext->key, host);
host = NULL;
}
}
}
}
buffer_free(fcgi_mode);
return HANDLER_GO_ON;
error:
if (NULL != host) fastcgi_host_free(host);
buffer_free(fcgi_mode);
return HANDLER_ERROR;
}
static int fcgi_set_state(server *srv, handler_ctx *hctx, fcgi_connection_state_t state) {
hctx->state = state;
hctx->state_timestamp = srv->cur_ts;
return 0;
}
static void fcgi_connection_close(server *srv, handler_ctx *hctx) {
plugin_data *p;
connection *con;
p = hctx->plugin_data;
con = hctx->remote_conn;
if (hctx->fd != -1) {
fdevent_event_del(srv->ev, &(hctx->fde_ndx), hctx->fd);
fdevent_unregister(srv->ev, hctx->fd);
close(hctx->fd);
srv->cur_fds--;
}
if (hctx->host && hctx->proc) {
if (hctx->got_proc) {
/* after the connect the process gets a load */
fcgi_proc_load_dec(srv, hctx);
if (p->conf.debug) {
log_error_write(srv, __FILE__, __LINE__, "ssdsbsd",
"released proc:",
"pid:", hctx->proc->pid,
"socket:", hctx->proc->connection_name,
"load:", hctx->proc->load);
}
}
}
handler_ctx_free(srv, hctx);
con->plugin_ctx[p->id] = NULL;
/* finish response (if not already finished) */
if (con->mode == p->id
&& (con->state == CON_STATE_HANDLE_REQUEST || con->state == CON_STATE_READ_POST)) {
/* (not CON_STATE_ERROR and not CON_STATE_RESPONSE_END,
* i.e. not called from fcgi_connection_reset()) */
/* Send an error if we haven't sent any data yet */
if (0 == con->file_started) {
con->http_status = 500;
con->mode = DIRECT;
}
else if (!con->file_finished) {
http_chunk_close(srv, con);
con->file_finished = 1;
}
}
}
static int fcgi_reconnect(server *srv, handler_ctx *hctx) {
plugin_data *p = hctx->plugin_data;
/* child died
*
* 1.
*
* connect was ok, connection was accepted
* but the php accept loop checks after the accept if it should die or not.
*
* if yes we can only detect it at a write()
*
* next step is resetting this attemp and setup a connection again
*
* if we have more than 5 reconnects for the same request, die
*
* 2.
*
* we have a connection but the child died by some other reason
*
*/
if (hctx->fd != -1) {
fdevent_event_del(srv->ev, &(hctx->fde_ndx), hctx->fd);
fdevent_unregister(srv->ev, hctx->fd);
close(hctx->fd);
srv->cur_fds--;
hctx->fd = -1;
}
fcgi_set_state(srv, hctx, FCGI_STATE_INIT);
hctx->request_id = 0;
hctx->reconnects++;
if (p->conf.debug > 2) {
if (hctx->proc) {
log_error_write(srv, __FILE__, __LINE__, "sdb",
"release proc for reconnect:",
hctx->proc->pid, hctx->proc->connection_name);
} else {
log_error_write(srv, __FILE__, __LINE__, "sb",
"release proc for reconnect:",
hctx->host->unixsocket);
}
}
if (hctx->proc && hctx->got_proc) {
fcgi_proc_load_dec(srv, hctx);
}
/* perhaps another host gives us more luck */
fcgi_host_reset(srv, hctx);
return 0;
}
static handler_t fcgi_connection_reset(server *srv, connection *con, void *p_d) {
plugin_data *p = p_d;
handler_ctx *hctx = con->plugin_ctx[p->id];
if (hctx) fcgi_connection_close(srv, hctx);
return HANDLER_GO_ON;
}
static int fcgi_env_add(buffer *env, const char *key, size_t key_len, const char *val, size_t val_len) {
size_t len;
char len_enc[8];
size_t len_enc_len = 0;
if (!key || !val) return -1;
len = key_len + val_len;
len += key_len > 127 ? 4 : 1;
len += val_len > 127 ? 4 : 1;
if (buffer_string_length(env) + len >= FCGI_MAX_LENGTH) {
/**
* we can't append more headers, ignore it
*/
return -1;
}
/**
* field length can be 31bit max
*
* HINT: this can't happen as FCGI_MAX_LENGTH is only 16bit
*/
force_assert(key_len < 0x7fffffffu);
force_assert(val_len < 0x7fffffffu);
buffer_string_prepare_append(env, len);
if (key_len > 127) {
len_enc[len_enc_len++] = ((key_len >> 24) & 0xff) | 0x80;
len_enc[len_enc_len++] = (key_len >> 16) & 0xff;
len_enc[len_enc_len++] = (key_len >> 8) & 0xff;
len_enc[len_enc_len++] = (key_len >> 0) & 0xff;
} else {
len_enc[len_enc_len++] = (key_len >> 0) & 0xff;
}
if (val_len > 127) {
len_enc[len_enc_len++] = ((val_len >> 24) & 0xff) | 0x80;
len_enc[len_enc_len++] = (val_len >> 16) & 0xff;
len_enc[len_enc_len++] = (val_len >> 8) & 0xff;
len_enc[len_enc_len++] = (val_len >> 0) & 0xff;
} else {
len_enc[len_enc_len++] = (val_len >> 0) & 0xff;
}
buffer_append_string_len(env, len_enc, len_enc_len);
buffer_append_string_len(env, key, key_len);
buffer_append_string_len(env, val, val_len);
return 0;
}
static int fcgi_header(FCGI_Header * header, unsigned char type, size_t request_id, int contentLength, unsigned char paddingLength) {
force_assert(contentLength <= FCGI_MAX_LENGTH);
header->version = FCGI_VERSION_1;
header->type = type;
header->requestIdB0 = request_id & 0xff;
header->requestIdB1 = (request_id >> 8) & 0xff;
header->contentLengthB0 = contentLength & 0xff;
header->contentLengthB1 = (contentLength >> 8) & 0xff;
header->paddingLength = paddingLength;
header->reserved = 0;
return 0;
}
typedef enum {
CONNECTION_OK,
CONNECTION_DELAYED, /* retry after event, take same host */
CONNECTION_OVERLOADED, /* disable for 1 second, take another backend */
CONNECTION_DEAD /* disable for 60 seconds, take another backend */
} connection_result_t;
static connection_result_t fcgi_establish_connection(server *srv, handler_ctx *hctx) {
struct sockaddr *fcgi_addr;
struct sockaddr_in fcgi_addr_in;
#ifdef HAVE_SYS_UN_H
struct sockaddr_un fcgi_addr_un;
#endif
socklen_t servlen;
fcgi_extension_host *host = hctx->host;
fcgi_proc *proc = hctx->proc;
int fcgi_fd = hctx->fd;
if (!buffer_string_is_empty(proc->unixsocket)) {
#ifdef HAVE_SYS_UN_H
/* use the unix domain socket */
memset(&fcgi_addr_un, 0, sizeof(fcgi_addr_un));
fcgi_addr_un.sun_family = AF_UNIX;
if (buffer_string_length(proc->unixsocket) + 1 > sizeof(fcgi_addr_un.sun_path)) {
log_error_write(srv, __FILE__, __LINE__, "sB",
"ERROR: Unix Domain socket filename too long:",
proc->unixsocket);
return -1;
}
memcpy(fcgi_addr_un.sun_path, proc->unixsocket->ptr, buffer_string_length(proc->unixsocket) + 1);
#ifdef SUN_LEN
servlen = SUN_LEN(&fcgi_addr_un);
#else
/* stevens says: */
servlen = buffer_string_length(proc->unixsocket) + 1 + sizeof(fcgi_addr_un.sun_family);
#endif
fcgi_addr = (struct sockaddr *) &fcgi_addr_un;
if (buffer_string_is_empty(proc->connection_name)) {
/* on remote spawing we have to set the connection-name now */
buffer_copy_string_len(proc->connection_name, CONST_STR_LEN("unix:"));
buffer_append_string_buffer(proc->connection_name, proc->unixsocket);
}
#else
return CONNECTION_DEAD;
#endif
} else {
memset(&fcgi_addr_in, 0, sizeof(fcgi_addr_in));
fcgi_addr_in.sin_family = AF_INET;
if (!buffer_string_is_empty(host->host)) {
if (0 == inet_aton(host->host->ptr, &(fcgi_addr_in.sin_addr))) {
log_error_write(srv, __FILE__, __LINE__, "sbs",
"converting IP address failed for", host->host,
"\nBe sure to specify an IP address here");
return CONNECTION_DEAD;
}
} else {
fcgi_addr_in.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
}
fcgi_addr_in.sin_port = htons(proc->port);
servlen = sizeof(fcgi_addr_in);
fcgi_addr = (struct sockaddr *) &fcgi_addr_in;
if (buffer_string_is_empty(proc->connection_name)) {
/* on remote spawing we have to set the connection-name now */
buffer_copy_string_len(proc->connection_name, CONST_STR_LEN("tcp:"));
if (!buffer_string_is_empty(host->host)) {
buffer_append_string_buffer(proc->connection_name, host->host);
} else {
buffer_append_string_len(proc->connection_name, CONST_STR_LEN("localhost"));
}
buffer_append_string_len(proc->connection_name, CONST_STR_LEN(":"));
buffer_append_int(proc->connection_name, proc->port);
}
}
if (-1 == connect(fcgi_fd, fcgi_addr, servlen)) {
if (errno == EINPROGRESS ||
errno == EALREADY ||
errno == EINTR) {
if (hctx->conf.debug > 2) {
log_error_write(srv, __FILE__, __LINE__, "sb",
"connect delayed; will continue later:", proc->connection_name);
}
return CONNECTION_DELAYED;
} else if (errno == EAGAIN) {
if (hctx->conf.debug) {
log_error_write(srv, __FILE__, __LINE__, "sbsd",
"This means that you have more incoming requests than your FastCGI backend can handle in parallel."
"It might help to spawn more FastCGI backends or PHP children; if not, decrease server.max-connections."
"The load for this FastCGI backend", proc->connection_name, "is", proc->load);
}
return CONNECTION_OVERLOADED;
} else {
log_error_write(srv, __FILE__, __LINE__, "sssb",
"connect failed:",
strerror(errno), "on",
proc->connection_name);
return CONNECTION_DEAD;
}
}
hctx->reconnects = 0;
if (hctx->conf.debug > 1) {
log_error_write(srv, __FILE__, __LINE__, "sd",
"connect succeeded: ", fcgi_fd);
}
return CONNECTION_OK;
}
#define FCGI_ENV_ADD_CHECK(ret, con) \
if (ret == -1) { \
con->http_status = 400; \
con->file_finished = 1; \
return -1; \
};
static int fcgi_env_add_request_headers(server *srv, connection *con, plugin_data *p) {
size_t i;
for (i = 0; i < con->request.headers->used; i++) {
data_string *ds;
ds = (data_string *)con->request.headers->data[i];
if (!buffer_is_empty(ds->value) && !buffer_is_empty(ds->key)) {
buffer_copy_string_encoded_cgi_varnames(srv->tmp_buf, CONST_BUF_LEN(ds->key), 1);
FCGI_ENV_ADD_CHECK(fcgi_env_add(p->fcgi_env, CONST_BUF_LEN(srv->tmp_buf), CONST_BUF_LEN(ds->value)),con);
}
}
for (i = 0; i < con->environment->used; i++) {
data_string *ds;
ds = (data_string *)con->environment->data[i];
if (!buffer_is_empty(ds->value) && !buffer_is_empty(ds->key)) {
buffer_copy_string_encoded_cgi_varnames(srv->tmp_buf, CONST_BUF_LEN(ds->key), 0);
FCGI_ENV_ADD_CHECK(fcgi_env_add(p->fcgi_env, CONST_BUF_LEN(srv->tmp_buf), CONST_BUF_LEN(ds->value)), con);
}
}
return 0;
}
static int fcgi_create_env(server *srv, handler_ctx *hctx, size_t request_id) {
FCGI_BeginRequestRecord beginRecord;
FCGI_Header header;
char buf[LI_ITOSTRING_LENGTH];
const char *s;
#ifdef HAVE_IPV6
char b2[INET6_ADDRSTRLEN + 1];
#endif
plugin_data *p = hctx->plugin_data;
fcgi_extension_host *host= hctx->host;
connection *con = hctx->remote_conn;
buffer * const req_uri = (con->error_handler_saved_status >= 0) ? con->request.uri : con->request.orig_uri;
server_socket *srv_sock = con->srv_socket;
sock_addr our_addr;
socklen_t our_addr_len;
/* send FCGI_BEGIN_REQUEST */
fcgi_header(&(beginRecord.header), FCGI_BEGIN_REQUEST, request_id, sizeof(beginRecord.body), 0);
beginRecord.body.roleB0 = host->mode;
beginRecord.body.roleB1 = 0;
beginRecord.body.flags = 0;
memset(beginRecord.body.reserved, 0, sizeof(beginRecord.body.reserved));
/* send FCGI_PARAMS */
buffer_string_prepare_copy(p->fcgi_env, 1023);
if (buffer_is_empty(con->conf.server_tag)) {
FCGI_ENV_ADD_CHECK(fcgi_env_add(p->fcgi_env, CONST_STR_LEN("SERVER_SOFTWARE"), CONST_STR_LEN(PACKAGE_DESC)),con)
} else {
FCGI_ENV_ADD_CHECK(fcgi_env_add(p->fcgi_env, CONST_STR_LEN("SERVER_SOFTWARE"), CONST_BUF_LEN(con->conf.server_tag)),con)
}
if (!buffer_is_empty(con->server_name)) {
size_t len = buffer_string_length(con->server_name);
if (con->server_name->ptr[0] == '[') {
const char *colon = strstr(con->server_name->ptr, "]:");
if (colon) len = (colon + 1) - con->server_name->ptr;
} else {
const char *colon = strchr(con->server_name->ptr, ':');
if (colon) len = colon - con->server_name->ptr;
}
FCGI_ENV_ADD_CHECK(fcgi_env_add(p->fcgi_env, CONST_STR_LEN("SERVER_NAME"), con->server_name->ptr, len),con)
} else {
#ifdef HAVE_IPV6
s = inet_ntop(srv_sock->addr.plain.sa_family,
srv_sock->addr.plain.sa_family == AF_INET6 ?
(const void *) &(srv_sock->addr.ipv6.sin6_addr) :
(const void *) &(srv_sock->addr.ipv4.sin_addr),
b2, sizeof(b2)-1);
#else
s = inet_ntoa(srv_sock->addr.ipv4.sin_addr);
#endif
FCGI_ENV_ADD_CHECK(fcgi_env_add(p->fcgi_env, CONST_STR_LEN("SERVER_NAME"), s, strlen(s)),con)
}
FCGI_ENV_ADD_CHECK(fcgi_env_add(p->fcgi_env, CONST_STR_LEN("GATEWAY_INTERFACE"), CONST_STR_LEN("CGI/1.1")),con)
li_utostrn(buf, sizeof(buf),
#ifdef HAVE_IPV6
ntohs(srv_sock->addr.plain.sa_family ? srv_sock->addr.ipv6.sin6_port : srv_sock->addr.ipv4.sin_port)
#else
ntohs(srv_sock->addr.ipv4.sin_port)
#endif
);
FCGI_ENV_ADD_CHECK(fcgi_env_add(p->fcgi_env, CONST_STR_LEN("SERVER_PORT"), buf, strlen(buf)),con)
/* get the server-side of the connection to the client */
our_addr_len = sizeof(our_addr);
if (-1 == getsockname(con->fd, (struct sockaddr *)&our_addr, &our_addr_len)
|| our_addr_len > sizeof(our_addr)) {
s = inet_ntop_cache_get_ip(srv, &(srv_sock->addr));
} else {
s = inet_ntop_cache_get_ip(srv, &(our_addr));
}
FCGI_ENV_ADD_CHECK(fcgi_env_add(p->fcgi_env, CONST_STR_LEN("SERVER_ADDR"), s, strlen(s)),con)
li_utostrn(buf, sizeof(buf),
#ifdef HAVE_IPV6
ntohs(con->dst_addr.plain.sa_family ? con->dst_addr.ipv6.sin6_port : con->dst_addr.ipv4.sin_port)
#else
ntohs(con->dst_addr.ipv4.sin_port)
#endif
);
FCGI_ENV_ADD_CHECK(fcgi_env_add(p->fcgi_env, CONST_STR_LEN("REMOTE_PORT"), buf, strlen(buf)),con)
s = inet_ntop_cache_get_ip(srv, &(con->dst_addr));
FCGI_ENV_ADD_CHECK(fcgi_env_add(p->fcgi_env, CONST_STR_LEN("REMOTE_ADDR"), s, strlen(s)),con)
if (con->request.content_length > 0 && host->mode != FCGI_AUTHORIZER) {
/* CGI-SPEC 6.1.2 and FastCGI spec 6.3 */
li_itostrn(buf, sizeof(buf), con->request.content_length);
FCGI_ENV_ADD_CHECK(fcgi_env_add(p->fcgi_env, CONST_STR_LEN("CONTENT_LENGTH"), buf, strlen(buf)),con)
}
if (host->mode != FCGI_AUTHORIZER) {
/*
* SCRIPT_NAME, PATH_INFO and PATH_TRANSLATED according to
* http://cgi-spec.golux.com/draft-coar-cgi-v11-03-clean.html
* (6.1.14, 6.1.6, 6.1.7)
* For AUTHORIZER mode these headers should be omitted.
*/
FCGI_ENV_ADD_CHECK(fcgi_env_add(p->fcgi_env, CONST_STR_LEN("SCRIPT_NAME"), CONST_BUF_LEN(con->uri.path)),con)
if (!buffer_string_is_empty(con->request.pathinfo)) {
FCGI_ENV_ADD_CHECK(fcgi_env_add(p->fcgi_env, CONST_STR_LEN("PATH_INFO"), CONST_BUF_LEN(con->request.pathinfo)),con)
/* PATH_TRANSLATED is only defined if PATH_INFO is set */
if (!buffer_string_is_empty(host->docroot)) {
buffer_copy_buffer(p->path, host->docroot);
} else {
buffer_copy_buffer(p->path, con->physical.basedir);
}
buffer_append_string_buffer(p->path, con->request.pathinfo);
FCGI_ENV_ADD_CHECK(fcgi_env_add(p->fcgi_env, CONST_STR_LEN("PATH_TRANSLATED"), CONST_BUF_LEN(p->path)),con)
} else {
FCGI_ENV_ADD_CHECK(fcgi_env_add(p->fcgi_env, CONST_STR_LEN("PATH_INFO"), CONST_STR_LEN("")),con)
}
}
/*
* SCRIPT_FILENAME and DOCUMENT_ROOT for php. The PHP manual
* http://www.php.net/manual/en/reserved.variables.php
* treatment of PATH_TRANSLATED is different from the one of CGI specs.
* TODO: this code should be checked against cgi.fix_pathinfo php
* parameter.
*/
if (!buffer_string_is_empty(host->docroot)) {
/*
* rewrite SCRIPT_FILENAME
*
*/
buffer_copy_buffer(p->path, host->docroot);
buffer_append_string_buffer(p->path, con->uri.path);
FCGI_ENV_ADD_CHECK(fcgi_env_add(p->fcgi_env, CONST_STR_LEN("SCRIPT_FILENAME"), CONST_BUF_LEN(p->path)),con)
FCGI_ENV_ADD_CHECK(fcgi_env_add(p->fcgi_env, CONST_STR_LEN("DOCUMENT_ROOT"), CONST_BUF_LEN(host->docroot)),con)
} else {
buffer_copy_buffer(p->path, con->physical.path);
/* cgi.fix_pathinfo need a broken SCRIPT_FILENAME to find out what PATH_INFO is itself
*
* see src/sapi/cgi_main.c, init_request_info()
*/
if (host->break_scriptfilename_for_php) {
buffer_append_string_buffer(p->path, con->request.pathinfo);
}
FCGI_ENV_ADD_CHECK(fcgi_env_add(p->fcgi_env, CONST_STR_LEN("SCRIPT_FILENAME"), CONST_BUF_LEN(p->path)),con)
FCGI_ENV_ADD_CHECK(fcgi_env_add(p->fcgi_env, CONST_STR_LEN("DOCUMENT_ROOT"), CONST_BUF_LEN(con->physical.basedir)),con)
}
if (!buffer_string_is_empty(host->strip_request_uri)) {
/* we need at least one char to strip off */
/**
* /app1/index/list
*
* stripping /app1 or /app1/ should lead to
*
* /index/list
*
*/
if ('/' != host->strip_request_uri->ptr[buffer_string_length(host->strip_request_uri) - 1]) {
/* fix the user-input to have / as last char */
buffer_append_string_len(host->strip_request_uri, CONST_STR_LEN("/"));
}
if (buffer_string_length(req_uri) >= buffer_string_length(host->strip_request_uri) &&
0 == strncmp(req_uri->ptr, host->strip_request_uri->ptr, buffer_string_length(host->strip_request_uri))) {
/* the left is the same */
FCGI_ENV_ADD_CHECK(fcgi_env_add(p->fcgi_env, CONST_STR_LEN("REQUEST_URI"),
req_uri->ptr + (buffer_string_length(host->strip_request_uri) - 1),
buffer_string_length(req_uri) - (buffer_string_length(host->strip_request_uri) - 1)), con)
} else {
FCGI_ENV_ADD_CHECK(fcgi_env_add(p->fcgi_env, CONST_STR_LEN("REQUEST_URI"), CONST_BUF_LEN(req_uri)),con)
}
} else {
FCGI_ENV_ADD_CHECK(fcgi_env_add(p->fcgi_env, CONST_STR_LEN("REQUEST_URI"), CONST_BUF_LEN(req_uri)),con)
}
if (!buffer_string_is_empty(con->uri.query)) {
FCGI_ENV_ADD_CHECK(fcgi_env_add(p->fcgi_env, CONST_STR_LEN("QUERY_STRING"), CONST_BUF_LEN(con->uri.query)),con)
} else {
FCGI_ENV_ADD_CHECK(fcgi_env_add(p->fcgi_env, CONST_STR_LEN("QUERY_STRING"), CONST_STR_LEN("")),con)
}
s = get_http_method_name(con->request.http_method);
force_assert(s);
FCGI_ENV_ADD_CHECK(fcgi_env_add(p->fcgi_env, CONST_STR_LEN("REQUEST_METHOD"), s, strlen(s)),con)
/* set REDIRECT_STATUS for php compiled with --force-redirect
* (if REDIRECT_STATUS has not already been set by error handler) */
if (0 == con->error_handler_saved_status) {
FCGI_ENV_ADD_CHECK(fcgi_env_add(p->fcgi_env, CONST_STR_LEN("REDIRECT_STATUS"), CONST_STR_LEN("200")), con);
}
s = get_http_version_name(con->request.http_version);
force_assert(s);
FCGI_ENV_ADD_CHECK(fcgi_env_add(p->fcgi_env, CONST_STR_LEN("SERVER_PROTOCOL"), s, strlen(s)),con)
if (buffer_is_equal_caseless_string(con->uri.scheme, CONST_STR_LEN("https"))) {
FCGI_ENV_ADD_CHECK(fcgi_env_add(p->fcgi_env, CONST_STR_LEN("HTTPS"), CONST_STR_LEN("on")),con)
}
FCGI_ENV_ADD_CHECK(fcgi_env_add_request_headers(srv, con, p), con);
{
buffer *b = buffer_init();
buffer_copy_string_len(b, (const char *)&beginRecord, sizeof(beginRecord));
fcgi_header(&(header), FCGI_PARAMS, request_id, buffer_string_length(p->fcgi_env), 0);
buffer_append_string_len(b, (const char *)&header, sizeof(header));
buffer_append_string_buffer(b, p->fcgi_env);
fcgi_header(&(header), FCGI_PARAMS, request_id, 0, 0);
buffer_append_string_len(b, (const char *)&header, sizeof(header));
chunkqueue_append_buffer(hctx->wb, b);
buffer_free(b);
}
if (con->request.content_length) {
chunkqueue *req_cq = con->request_content_queue;
off_t offset;
/* something to send ? */
for (offset = 0; offset != req_cq->bytes_in; ) {
off_t weWant = req_cq->bytes_in - offset > FCGI_MAX_LENGTH ? FCGI_MAX_LENGTH : req_cq->bytes_in - offset;
/* we announce toWrite octets
* now take all the request_content chunks that we need to fill this request
* */
fcgi_header(&(header), FCGI_STDIN, request_id, weWant, 0);
chunkqueue_append_mem(hctx->wb, (const char *)&header, sizeof(header));
if (p->conf.debug > 10) {
log_error_write(srv, __FILE__, __LINE__, "soso", "tosend:", offset, "/", req_cq->bytes_in);
}
chunkqueue_steal(hctx->wb, req_cq, weWant);
offset += weWant;
}
}
/* terminate STDIN */
fcgi_header(&(header), FCGI_STDIN, request_id, 0, 0);
chunkqueue_append_mem(hctx->wb, (const char *)&header, sizeof(header));
return 0;
}
static int fcgi_response_parse(server *srv, connection *con, plugin_data *p, buffer *in) {
char *s, *ns;
handler_ctx *hctx = con->plugin_ctx[p->id];
fcgi_extension_host *host= hctx->host;
int have_sendfile2 = 0;
off_t sendfile2_content_length = 0;
UNUSED(srv);
/* search for \n */
for (s = in->ptr; NULL != (ns = strchr(s, '\n')); s = ns + 1) {
char *key, *value;
int key_len;
data_string *ds = NULL;
/* a good day. Someone has read the specs and is sending a \r\n to us */
if (ns > in->ptr &&
*(ns-1) == '\r') {
*(ns-1) = '\0';
}
ns[0] = '\0';
key = s;
if (NULL == (value = strchr(s, ':'))) {
/* we expect: "<key>: <value>\n" */
continue;
}
key_len = value - key;
value++;
/* strip WS */
while (*value == ' ' || *value == '\t') value++;
if (host->mode != FCGI_AUTHORIZER ||
!(con->http_status == 0 ||
con->http_status == 200)) {
/* authorizers shouldn't affect the response headers sent back to the client */
/* don't forward Status: */
if (0 != strncasecmp(key, "Status", key_len)) {
if (NULL == (ds = (data_string *)array_get_unused_element(con->response.headers, TYPE_STRING))) {
ds = data_response_init();
}
buffer_copy_string_len(ds->key, key, key_len);
buffer_copy_string(ds->value, value);
array_insert_unique(con->response.headers, (data_unset *)ds);
}
}
switch(key_len) {
case 4:
if (0 == strncasecmp(key, "Date", key_len)) {
con->parsed_response |= HTTP_DATE;
}
break;
case 6:
if (0 == strncasecmp(key, "Status", key_len)) {
int status = strtol(value, NULL, 10);
if (status >= 100 && status < 1000) {
con->http_status = status;
con->parsed_response |= HTTP_STATUS;
} else {
con->http_status = 502;
}
}
break;
case 8:
if (0 == strncasecmp(key, "Location", key_len)) {
con->parsed_response |= HTTP_LOCATION;
}
break;
case 10:
if (0 == strncasecmp(key, "Connection", key_len)) {
con->response.keep_alive = (0 == strcasecmp(value, "Keep-Alive")) ? 1 : 0;
con->parsed_response |= HTTP_CONNECTION;
}
break;
case 11:
if (host->allow_xsendfile && 0 == strncasecmp(key, "X-Sendfile2", key_len)&& hctx->send_content_body) {
char *pos = value;
have_sendfile2 = 1;
while (*pos) {
char *filename, *range;
stat_cache_entry *sce;
off_t begin_range, end_range, range_len;
while (' ' == *pos) pos++;
if (!*pos) break;
filename = pos;
if (NULL == (range = strchr(pos, ' '))) {
/* missing range */
if (p->conf.debug) {
log_error_write(srv, __FILE__, __LINE__, "ss", "Couldn't find range after filename:", filename);
}
return 502;
}
buffer_copy_string_len(srv->tmp_buf, filename, range - filename);
/* find end of range */
for (pos = ++range; *pos && *pos != ' ' && *pos != ','; pos++) ;
buffer_urldecode_path(srv->tmp_buf);
if (HANDLER_ERROR == stat_cache_get_entry(srv, con, srv->tmp_buf, &sce)) {
if (p->conf.debug) {
log_error_write(srv, __FILE__, __LINE__, "sb",
"send-file error: couldn't get stat_cache entry for X-Sendfile2:",
srv->tmp_buf);
}
return 404;
} else if (!S_ISREG(sce->st.st_mode)) {
if (p->conf.debug) {
log_error_write(srv, __FILE__, __LINE__, "sb",
"send-file error: wrong filetype for X-Sendfile2:",
srv->tmp_buf);
}
return 502;
}
/* found the file */
/* parse range */
begin_range = 0; end_range = sce->st.st_size - 1;
{
char *rpos = NULL;
errno = 0;
begin_range = strtoll(range, &rpos, 10);
if (errno != 0 || begin_range < 0 || rpos == range) goto range_failed;
if ('-' != *rpos++) goto range_failed;
if (rpos != pos) {
range = rpos;
end_range = strtoll(range, &rpos, 10);
if (errno != 0 || end_range < 0 || rpos == range) goto range_failed;
}
if (rpos != pos) goto range_failed;
goto range_success;
range_failed:
if (p->conf.debug) {
log_error_write(srv, __FILE__, __LINE__, "ss", "Couldn't decode range after filename:", filename);
}
return 502;
range_success: ;
}
/* no parameters accepted */
while (*pos == ' ') pos++;
if (*pos != '\0' && *pos != ',') return 502;
range_len = end_range - begin_range + 1;
if (range_len < 0) return 502;
if (range_len != 0) {
if (0 != http_chunk_append_file_range(srv, con, srv->tmp_buf, begin_range, range_len)) {
return 502;
}
}
sendfile2_content_length += range_len;
if (*pos == ',') pos++;
}
}
break;
case 14:
if (0 == strncasecmp(key, "Content-Length", key_len)) {
con->response.content_length = strtoul(value, NULL, 10);
con->parsed_response |= HTTP_CONTENT_LENGTH;
if (con->response.content_length < 0) con->response.content_length = 0;
}
break;
default:
break;
}
}
if (have_sendfile2) {
data_string *dcls;
hctx->send_content_body = 0;
joblist_append(srv, con);
/* fix content-length */
if (NULL == (dcls = (data_string *)array_get_unused_element(con->response.headers, TYPE_STRING))) {
dcls = data_response_init();
}
buffer_copy_string_len(dcls->key, "Content-Length", sizeof("Content-Length")-1);
buffer_copy_int(dcls->value, sendfile2_content_length);
array_replace(con->response.headers, (data_unset *)dcls);
con->parsed_response |= HTTP_CONTENT_LENGTH;
con->response.content_length = sendfile2_content_length;
}
/* CGI/1.1 rev 03 - 7.2.1.2 */
if ((con->parsed_response & HTTP_LOCATION) &&