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lighttpd1.4/src/mod_fastcgi.c

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#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>
#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 <fastcgi.h>
#include <stdio.h>
#ifdef HAVE_SYS_FILIO_H
# include <sys/filio.h>
#endif
#include "sys-socket.h"
#ifndef UNIX_PATH_MAX
# define UNIX_PATH_MAX 108
#endif
#ifdef HAVE_SYS_UIO_H
#include <sys/uio.h>
#endif
#ifdef HAVE_SYS_WAIT_H
#include <sys/wait.h>
#endif
/*
*
* 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 *socket; /* config.socket + "-" + id */
unsigned port; /* config.port + pno */
pid_t pid; /* PID of the spawned process (0 if not spawned locally) */
size_t load; /* number of requests waiting on this process */
time_t last_used; /* see idle_timeout */
size_t requests; /* see max_requests */
struct fcgi_proc *prev, *next; /* see first */
time_t disable_ts; /* replace by host->something */
int is_local;
enum { PROC_STATE_UNSET, /* init-phase */
PROC_STATE_RUNNING, /* alive */
PROC_STATE_DIED_WAIT_FOR_PID,
PROC_STATE_KILLED, /* was killed as we don't have the load anymore */
PROC_STATE_DIED, /* marked as dead, should be restarted */
PROC_STATE_DISABLED /* proc disabled as it resulted in an error */
} state;
} fcgi_proc;
typedef struct {
/* 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 min_procs;
unsigned short max_procs;
size_t num_procs; /* how many procs are started */
size_t active_procs; /* how many of them are really running */
unsigned short max_load_per_proc;
/*
* kick the process from the list if it was not
* used for idle_timeout until min_procs is
* reached. this helps to get the processlist
* small again we had a small peak load.
*
*/
unsigned short idle_timeout;
/*
* time after a disabled remote connection is tried to be re-enabled
*
*
*/
unsigned short disable_time;
/*
* same 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 tcp/ip should be used host AND port have
* to be specified
*
*/
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 tell 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 provied
*
*/
unsigned short break_scriptfilename_for_php;
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 its afterwards */
} 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 */
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;
int debug;
} plugin_config;
typedef struct {
size_t *ptr;
size_t used;
size_t size;
} buffer_uint;
typedef struct {
char **ptr;
size_t size;
size_t used;
} char_array;
/* generic plugin data, shared between all connections */
typedef struct {
PLUGIN_DATA;
buffer_uint fcgi_request_id;
buffer *fcgi_env;
buffer *path;
buffer *parse_response;
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, FCGI_STATE_PREPARE_WRITE,
FCGI_STATE_WRITE, FCGI_STATE_READ
} fcgi_connection_state_t;
typedef struct {
buffer *response;
size_t response_len;
int response_type;
int response_padding;
size_t response_request_id;
fcgi_proc *proc;
fcgi_extension_host *host;
fcgi_connection_state_t state;
time_t state_timestamp;
int reconnects; /* number of reconnect attempts */
buffer *write_buffer;
size_t write_offset;
read_buffer *rb;
buffer *response_header;
int delayed; /* flag to mark that the connect() is delayed */
size_t request_id;
int fd; /* fd to the fastcgi process */
int fde_ndx; /* index into the fd-event buffer */
size_t path_info_offset; /* start of path_info in uri.path */
pid_t pid;
int got_proc;
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(void *s, void *ctx, int revents);
int fcgi_proclist_sort_down(server *srv, fcgi_extension_host *host, fcgi_proc *proc);
static handler_ctx * handler_ctx_init() {
handler_ctx * hctx;
hctx = calloc(1, sizeof(*hctx));
assert(hctx);
hctx->fde_ndx = -1;
hctx->response = buffer_init();
hctx->response_header = buffer_init();
hctx->write_buffer = buffer_init();
hctx->request_id = 0;
hctx->state = FCGI_STATE_INIT;
hctx->proc = NULL;
hctx->response_len = 0;
hctx->response_type = 0;
hctx->response_padding = 0;
hctx->response_request_id = 0;
hctx->fd = -1;
hctx->reconnects = 0;
return hctx;
}
static void handler_ctx_free(handler_ctx *hctx) {
buffer_free(hctx->response);
buffer_free(hctx->response_header);
buffer_free(hctx->write_buffer);
if (hctx->rb) {
if (hctx->rb->ptr) free(hctx->rb->ptr);
free(hctx->rb);
}
free(hctx);
}
fcgi_proc *fastcgi_process_init() {
fcgi_proc *f;
f = calloc(1, sizeof(*f));
f->socket = buffer_init();
f->prev = NULL;
f->next = NULL;
return f;
}
void fastcgi_process_free(fcgi_proc *f) {
if (!f) return;
fastcgi_process_free(f->next);
buffer_free(f->socket);
free(f);
}
fcgi_extension_host *fastcgi_host_init() {
fcgi_extension_host *f;
f = calloc(1, sizeof(*f));
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();
return f;
}
void fastcgi_host_free(fcgi_extension_host *h) {
if (!h) return;
buffer_free(h->host);
buffer_free(h->unixsocket);
buffer_free(h->docroot);
buffer_free(h->bin_path);
array_free(h->bin_env);
array_free(h->bin_env_copy);
fastcgi_process_free(h->first);
fastcgi_process_free(h->unused_procs);
free(h);
}
fcgi_exts *fastcgi_extensions_init() {
fcgi_exts *f;
f = calloc(1, sizeof(*f));
return f;
}
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);
}
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));
assert(fe);
fe->key = buffer_init();
buffer_copy_string_buffer(fe->key, key);
/* */
if (ext->size == 0) {
ext->size = 8;
ext->exts = malloc(ext->size * sizeof(*(ext->exts)));
assert(ext->exts);
} else if (ext->used == ext->size) {
ext->size += 8;
ext->exts = realloc(ext->exts, ext->size * sizeof(*(ext->exts)));
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)));
assert(fe->hosts);
} else if (fe->size == fe->used) {
fe->size += 4;
fe->hosts = realloc(fe->hosts, fe->size * sizeof(*(fe->hosts)));
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->parse_response = buffer_init();
return p;
}
FREE_FUNC(mod_fastcgi_free) {
plugin_data *p = p_d;
buffer_uint *r = &(p->fcgi_request_id);
UNUSED(srv);
if (r->ptr) free(r->ptr);
buffer_free(p->fcgi_env);
buffer_free(p->path);
buffer_free(p->parse_response);
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 (!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, SIGTERM);
if (proc->is_local &&
!buffer_is_empty(proc->socket)) {
unlink(proc->socket->ptr);
}
}
for (proc = host->unused_procs; proc; proc = proc->next) {
if (proc->pid != 0) kill(proc->pid, SIGTERM);
if (proc->is_local &&
!buffer_is_empty(proc->socket)) {
unlink(proc->socket->ptr);
}
}
}
}
fastcgi_extensions_free(s->exts);
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;
if (!key || !val) return -1;
dst = malloc(key_len + val_len + 3);
memcpy(dst, key, key_len);
dst[key_len] = '=';
/* add the \0 from the value */
memcpy(dst + key_len + 1, val, val_len + 1);
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));
}
env->ptr[env->used++] = dst;
return 0;
}
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;
#ifndef HAVE_FORK
return -1;
#endif
if (p->conf.debug) {
log_error_write(srv, __FILE__, __LINE__, "sdb",
"new proc, socket:", proc->port, proc->socket);
}
if (!buffer_is_empty(proc->socket)) {
memset(&fcgi_addr, 0, sizeof(fcgi_addr));
#ifdef HAVE_SYS_UN_H
fcgi_addr_un.sun_family = AF_UNIX;
strcpy(fcgi_addr_un.sun_path, proc->socket->ptr);
#ifdef SUN_LEN
servlen = SUN_LEN(&fcgi_addr_un);
#else
/* stevens says: */
servlen = proc->socket->used - 1 + sizeof(fcgi_addr_un.sun_family);
#endif
socket_type = AF_UNIX;
fcgi_addr = (struct sockaddr *) &fcgi_addr_un;
#else
log_error_write(srv, __FILE__, __LINE__, "s",
"ERROR: Unix Domain sockets are not supported.");
return -1;
#endif
} else {
fcgi_addr_in.sin_family = AF_INET;
if (buffer_is_empty(host->host)) {
fcgi_addr_in.sin_addr.s_addr = htonl(INADDR_ANY);
} else {
struct hostent *he;
/* set a usefull default */
fcgi_addr_in.sin_addr.s_addr = htonl(INADDR_ANY);
if (NULL == (he = gethostbyname(host->host->ptr))) {
log_error_write(srv, __FILE__, __LINE__,
"ssb", "gethostbyname failed: ",
hstrerror(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;
}
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 in */
pid_t child;
int val;
if (!buffer_is_empty(proc->socket)) {
unlink(proc->socket->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));
return -1;
}
/* create socket */
if (-1 == bind(fcgi_fd, fcgi_addr, servlen)) {
log_error_write(srv, __FILE__, __LINE__, "sbds",
"bind failed for:",
proc->socket,
proc->port,
strerror(errno));
return -1;
}
if (-1 == listen(fcgi_fd, 1024)) {
log_error_write(srv, __FILE__, __LINE__, "ss",
"listen failed:", strerror(errno));
return -1;
}
#ifdef HAVE_FORK
switch ((child = fork())) {
case 0: {
buffer *b;
size_t i = 0;
char_array env;
/* create environment */
env.ptr = NULL;
env.size = 0;
env.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 {
for (i = 0; environ[i]; i++) {
char *eq;
if (NULL != (eq = strchr(environ[i], '='))) {
env_add(&env, environ[i], eq - environ[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;
b = buffer_init();
buffer_copy_string(b, "exec ");
buffer_append_string_buffer(b, host->bin_path);
/* exec the cgi */
execle("/bin/sh", "sh", "-c", b->ptr, NULL, env.ptr);
log_error_write(srv, __FILE__, __LINE__, "sbs",
"execl failed for:", host->bin_path, strerror(errno));
exit(errno);
break;
}
case -1:
/* error */
break;
default:
/* father */
/* 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:
/* the child should not terminate at all */
if (WIFEXITED(status)) {
log_error_write(srv, __FILE__, __LINE__, "sd",
"child exited (is this a FastCGI binary ?):",
WEXITSTATUS(status));
} else if (WIFSIGNALED(status)) {
log_error_write(srv, __FILE__, __LINE__, "sd",
"child signaled:",
WTERMSIG(status));
} else {
log_error_write(srv, __FILE__, __LINE__, "sd",
"child died somehow:",
status);
}
return -1;
}
/* register process */
proc->pid = child;
proc->last_used = srv->cur_ts;
proc->is_local = 1;
break;
}
#endif
} else {
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->socket);
}
}
proc->state = PROC_STATE_RUNNING;
host->active_procs++;
close(fcgi_fd);
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();
config_values_t cv[] = {
{ "fastcgi.server", NULL, T_CONFIG_LOCAL, T_CONFIG_SCOPE_CONNECTION }, /* 0 */
{ "fastcgi.debug", NULL, T_CONFIG_SHORT, T_CONFIG_SCOPE_CONNECTION }, /* 1 */
{ NULL, NULL, T_CONFIG_UNSET, T_CONFIG_SCOPE_UNSET }
};
p->config_storage = calloc(1, srv->config_context->used * sizeof(specific_config *));
for (i = 0; i < srv->config_context->used; i++) {
plugin_config *s;
array *ca;
s = malloc(sizeof(plugin_config));
s->exts = fastcgi_extensions_init();
s->debug = 0;
cv[0].destination = s->exts;
cv[1].destination = &(s->debug);
p->config_storage[i] = s;
ca = ((data_config *)srv->config_context->data[i])->value;
if (0 != config_insert_values_global(srv, ca, cv)) {
return HANDLER_ERROR;
}
/*
* <key> = ( ... )
*/
if (NULL != (du = array_get_element(ca, "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", "array of strings");
return HANDLER_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)");
return HANDLER_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];
fcgi_extension_host *df;
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 */
{ "min-procs-not-working", NULL, T_CONFIG_SHORT, T_CONFIG_SCOPE_CONNECTION }, /* 7 this is broken for now */
{ "max-procs", NULL, T_CONFIG_SHORT, T_CONFIG_SCOPE_CONNECTION }, /* 8 */
{ "max-load-per-proc", NULL, T_CONFIG_SHORT, T_CONFIG_SCOPE_CONNECTION }, /* 9 */
{ "idle-timeout", NULL, T_CONFIG_SHORT, T_CONFIG_SCOPE_CONNECTION }, /* 10 */
{ "disable-time", NULL, T_CONFIG_SHORT, T_CONFIG_SCOPE_CONNECTION }, /* 11 */
{ "bin-environment", NULL, T_CONFIG_ARRAY, T_CONFIG_SCOPE_CONNECTION }, /* 12 */
{ "bin-copy-environment", NULL, T_CONFIG_ARRAY, T_CONFIG_SCOPE_CONNECTION }, /* 13 */
{ "broken-scriptfilename", NULL, T_CONFIG_BOOLEAN, T_CONFIG_SCOPE_CONNECTION }, /* 14 */
{ 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)");
return HANDLER_ERROR;
}
df = fastcgi_host_init();
df->check_local = 1;
df->min_procs = 4;
df->max_procs = 4;
df->max_load_per_proc = 1;
df->idle_timeout = 60;
df->mode = FCGI_RESPONDER;
df->disable_time = 60;
df->break_scriptfilename_for_php = 0;
fcv[0].destination = df->host;
fcv[1].destination = df->docroot;
fcv[2].destination = fcgi_mode;
fcv[3].destination = df->unixsocket;
fcv[4].destination = df->bin_path;
fcv[5].destination = &(df->check_local);
fcv[6].destination = &(df->port);
fcv[7].destination = &(df->min_procs);
fcv[8].destination = &(df->max_procs);
fcv[9].destination = &(df->max_load_per_proc);
fcv[10].destination = &(df->idle_timeout);
fcv[11].destination = &(df->disable_time);
fcv[12].destination = df->bin_env;
fcv[13].destination = df->bin_env_copy;
fcv[14].destination = &(df->break_scriptfilename_for_php);
if (0 != config_insert_values_internal(srv, da_host->value, fcv)) {
return HANDLER_ERROR;
}
if ((!buffer_is_empty(df->host) || df->port) &&
!buffer_is_empty(df->unixsocket)) {
log_error_write(srv, __FILE__, __LINE__, "s",
"either host+port or socket");
return HANDLER_ERROR;
}
if (!buffer_is_empty(df->unixsocket)) {
/* unix domain socket */
if (df->unixsocket->used > UNIX_PATH_MAX - 2) {
log_error_write(srv, __FILE__, __LINE__, "s",
"path of the unixdomain socket is too large");
return HANDLER_ERROR;
}
} else {
/* tcp/ip */
if (buffer_is_empty(df->host) &&
buffer_is_empty(df->bin_path)) {
log_error_write(srv, __FILE__, __LINE__, "sbbbs",
"missing key (string):",
da->key,
da_ext->key,
da_host->key,
"host");
return HANDLER_ERROR;
} else if (df->port == 0) {
log_error_write(srv, __FILE__, __LINE__, "sbbbs",
"missing key (short):",
da->key,
da_ext->key,
da_host->key,
"port");
return HANDLER_ERROR;
}
}
if (!buffer_is_empty(df->bin_path)) {
/* a local socket + self spawning */
size_t pno;
/* HACK: just to make sure the adaptive spawing is disabled */
df->min_procs = df->max_procs;
if (df->min_procs > df->max_procs) df->max_procs = df->min_procs;
if (df->max_load_per_proc < 1) df->max_load_per_proc = 0;
if (s->debug) {
log_error_write(srv, __FILE__, __LINE__, "ssbsdsbsdsd",
"--- fastcgi spawning local",
"\n\tproc:", df->bin_path,
"\n\tport:", df->port,
"\n\tsocket", df->unixsocket,
"\n\tmin-procs:", df->min_procs,
"\n\tmax-procs:", df->max_procs);
}
for (pno = 0; pno < df->min_procs; pno++) {
fcgi_proc *proc;
proc = fastcgi_process_init();
proc->id = df->num_procs++;
df->max_id++;
if (buffer_is_empty(df->unixsocket)) {
proc->port = df->port + pno;
} else {
buffer_copy_string_buffer(proc->socket, df->unixsocket);
buffer_append_string(proc->socket, "-");
buffer_append_long(proc->socket, pno);
}
if (s->debug) {
log_error_write(srv, __FILE__, __LINE__, "ssdsbsdsd",
"--- fastcgi spawning",
"\n\tport:", df->port,
"\n\tsocket", df->unixsocket,
"\n\tcurrent:", pno, "/", df->min_procs);
}
if (fcgi_spawn_connection(srv, p, df, proc)) {
log_error_write(srv, __FILE__, __LINE__, "s",
"[ERROR]: spawning fcgi failed.");
return HANDLER_ERROR;
}
proc->next = df->first;
if (df->first) df->first->prev = proc;
df->first = proc;
}
} else {
fcgi_proc *fp;
fp = fastcgi_process_init();
fp->id = df->num_procs++;
df->max_id++;
df->active_procs++;
fp->state = PROC_STATE_RUNNING;
if (buffer_is_empty(df->unixsocket)) {
fp->port = df->port;
} else {
buffer_copy_string_buffer(fp->socket, df->unixsocket);
}
df->first = fp;
df->min_procs = 1;
df->max_procs = 1;
}
if (!buffer_is_empty(fcgi_mode)) {
if (strcmp(fcgi_mode->ptr, "responder") == 0) {
df->mode = FCGI_RESPONDER;
} else if (strcmp(fcgi_mode->ptr, "authorizer") == 0) {
df->mode = FCGI_AUTHORIZER;
if (buffer_is_empty(df->docroot)) {
log_error_write(srv, __FILE__, __LINE__, "s",
"ERROR: docroot is required for authorizer mode.");
return HANDLER_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, df);
}
}
}
}
buffer_free(fcgi_mode);
return HANDLER_GO_ON;
}
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 size_t fcgi_requestid_new(server *srv, plugin_data *p) {
size_t m = 0;
size_t i;
buffer_uint *r = &(p->fcgi_request_id);
UNUSED(srv);
for (i = 0; i < r->used; i++) {
if (r->ptr[i] > m) m = r->ptr[i];
}
if (r->size == 0) {
r->size = 16;
r->ptr = malloc(sizeof(*r->ptr) * r->size);
} else if (r->used == r->size) {
r->size += 16;
r->ptr = realloc(r->ptr, sizeof(*r->ptr) * r->size);
}
r->ptr[r->used++] = ++m;
return m;
}
static int fcgi_requestid_del(server *srv, plugin_data *p, size_t request_id) {
size_t i;
buffer_uint *r = &(p->fcgi_request_id);
UNUSED(srv);
for (i = 0; i < r->used; i++) {
if (r->ptr[i] == request_id) break;
}
if (i != r->used) {
/* found */
if (i != r->used - 1) {
r->ptr[i] = r->ptr[r->used - 1];
}
r->used--;
}
return 0;
}
void fcgi_connection_cleanup(server *srv, handler_ctx *hctx) {
plugin_data *p;
connection *con;
if (NULL == hctx) return;
p = hctx->plugin_data;
con = hctx->remote_conn;
if (con->mode != p->id) {
WP();
return;
}
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->request_id != 0) {
fcgi_requestid_del(srv, p, hctx->request_id);
}
if (hctx->host && hctx->proc) {
hctx->host->load--;
if (hctx->got_proc) {
/* after the connect the process gets a load */
hctx->proc->load--;
if (p->conf.debug) {
log_error_write(srv, __FILE__, __LINE__, "sddb",
"release proc:",
hctx->fd,
hctx->proc->pid, hctx->proc->socket);
}
}
fcgi_proclist_sort_down(srv, hctx->host, hctx->proc);
}
handler_ctx_free(hctx);
con->plugin_ctx[p->id] = NULL;
}
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 then 5 reconnects for the same request, die
*
* 2.
*
* we have a connection but the child died by some other reason
*
*/
fdevent_event_del(srv->ev, &(hctx->fde_ndx), hctx->fd);
fdevent_unregister(srv->ev, hctx->fd);
close(hctx->fd);
srv->cur_fds--;
fcgi_requestid_del(srv, p, hctx->request_id);
fcgi_set_state(srv, hctx, FCGI_STATE_INIT);
hctx->request_id = 0;
hctx->reconnects++;
if (p->conf.debug) {
log_error_write(srv, __FILE__, __LINE__, "sddb",
"release proc:",
hctx->fd,
hctx->proc->pid, hctx->proc->socket);
}
hctx->proc->load--;
fcgi_proclist_sort_down(srv, hctx->host, hctx->proc);
return 0;
}
static handler_t fcgi_connection_reset(server *srv, connection *con, void *p_d) {
plugin_data *p = p_d;
fcgi_connection_cleanup(srv, con->plugin_ctx[p->id]);
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;
if (!key || !val) return -1;
len = key_len + val_len;
len += key_len > 127 ? 4 : 1;
len += val_len > 127 ? 4 : 1;
buffer_prepare_append(env, len);
if (key_len > 127) {
env->ptr[env->used++] = ((key_len >> 24) & 0xff) | 0x80;
env->ptr[env->used++] = (key_len >> 16) & 0xff;
env->ptr[env->used++] = (key_len >> 8) & 0xff;
env->ptr[env->used++] = (key_len >> 0) & 0xff;
} else {
env->ptr[env->used++] = (key_len >> 0) & 0xff;
}
if (val_len > 127) {
env->ptr[env->used++] = ((val_len >> 24) & 0xff) | 0x80;
env->ptr[env->used++] = (val_len >> 16) & 0xff;
env->ptr[env->used++] = (val_len >> 8) & 0xff;
env->ptr[env->used++] = (val_len >> 0) & 0xff;
} else {
env->ptr[env->used++] = (val_len >> 0) & 0xff;
}
memcpy(env->ptr + env->used, key, key_len);
env->used += key_len;
memcpy(env->ptr + env->used, val, val_len);
env->used += val_len;
return 0;
}
static int fcgi_header(FCGI_Header * header, unsigned char type, size_t request_id, int contentLength, unsigned char paddingLength) {
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;
}
/**
*
* returns
* -1 error
* 0 connected
* 1 not connected yet
*/
static int 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;
memset(&fcgi_addr, 0, sizeof(fcgi_addr));
if (!buffer_is_empty(proc->socket)) {
#ifdef HAVE_SYS_UN_H
/* use the unix domain socket */
fcgi_addr_un.sun_family = AF_UNIX;
strcpy(fcgi_addr_un.sun_path, proc->socket->ptr);
#ifdef SUN_LEN
servlen = SUN_LEN(&fcgi_addr_un);
#else
/* stevens says: */
servlen = proc->socket->used - 1 + sizeof(fcgi_addr_un.sun_family);
#endif
fcgi_addr = (struct sockaddr *) &fcgi_addr_un;
#else
return -1;
#endif
} else {
fcgi_addr_in.sin_family = AF_INET;
if (0 == inet_aton(host->host->ptr, &(fcgi_addr_in.sin_addr))) {
log_error_write(srv, __FILE__, __LINE__, "sbs",
"converting IP-adress failed for", host->host,
"\nBe sure to specify an IP address here");
return -1;
}
fcgi_addr_in.sin_port = htons(proc->port);
servlen = sizeof(fcgi_addr_in);
fcgi_addr = (struct sockaddr *) &fcgi_addr_in;
}
if (-1 == connect(fcgi_fd, fcgi_addr, servlen)) {
if (errno == EINPROGRESS ||
errno == EALREADY ||
errno == EINTR) {
if (hctx->conf.debug) {
log_error_write(srv, __FILE__, __LINE__, "sd",
"connect delayed, will continue later:", fcgi_fd);
}
return 1;
} else {
log_error_write(srv, __FILE__, __LINE__, "sdsddb",
"connect failed:", fcgi_fd,
strerror(errno), errno,
proc->port, proc->socket);
if (errno == EAGAIN) {
/* this is Linux only */
log_error_write(srv, __FILE__, __LINE__, "s",
"If this happend on Linux: You have been run out of local ports. "
"Check the manual, section Performance how to handle this.");
}
return -1;
}
}
if (hctx->conf.debug > 1) {
log_error_write(srv, __FILE__, __LINE__, "sd",
"connect succeeded: ", fcgi_fd);
}
return 0;
}
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 (ds->value->used && ds->key->used) {
size_t j;
buffer_reset(srv->tmp_buf);
if (0 != strcasecmp(ds->key->ptr, "CONTENT-TYPE")) {
BUFFER_COPY_STRING_CONST(srv->tmp_buf, "HTTP_");
srv->tmp_buf->used--;
}
buffer_prepare_append(srv->tmp_buf, ds->key->used + 2);
for (j = 0; j < ds->key->used - 1; j++) {
srv->tmp_buf->ptr[srv->tmp_buf->used++] =
light_isalpha(ds->key->ptr[j]) ?
ds->key->ptr[j] & ~32 : '_';
}
srv->tmp_buf->ptr[srv->tmp_buf->used++] = '\0';
fcgi_env_add(p->fcgi_env, CONST_BUF_LEN(srv->tmp_buf), CONST_BUF_LEN(ds->value));
}
}
for (i = 0; i < con->environment->used; i++) {
data_string *ds;
ds = (data_string *)con->environment->data[i];
if (ds->value->used && ds->key->used) {
size_t j;
buffer_reset(srv->tmp_buf);
buffer_prepare_append(srv->tmp_buf, ds->key->used + 2);
for (j = 0; j < ds->key->used - 1; j++) {
srv->tmp_buf->ptr[srv->tmp_buf->used++] =
isalpha((unsigned char)ds->key->ptr[j]) ?
toupper((unsigned char)ds->key->ptr[j]) : '_';
}
srv->tmp_buf->ptr[srv->tmp_buf->used++] = '\0';
fcgi_env_add(p->fcgi_env, CONST_BUF_LEN(srv->tmp_buf), CONST_BUF_LEN(ds->value));
}
}
return 0;
}
static int fcgi_create_env(server *srv, handler_ctx *hctx, size_t request_id) {
FCGI_BeginRequestRecord beginRecord;
FCGI_Header header;
char buf[32];
size_t offset;
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;
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));
buffer_copy_memory(hctx->write_buffer, (const char *)&beginRecord, sizeof(beginRecord));
/* send FCGI_PARAMS */
buffer_prepare_copy(p->fcgi_env, 1024);
fcgi_env_add(p->fcgi_env, CONST_STR_LEN("SERVER_SOFTWARE"), CONST_STR_LEN(PACKAGE_NAME"/"PACKAGE_VERSION));
if (con->server_name->used) {
fcgi_env_add(p->fcgi_env, CONST_STR_LEN("SERVER_NAME"), CONST_BUF_LEN(con->server_name));
} 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(p->fcgi_env, CONST_STR_LEN("SERVER_NAME"), s, strlen(s));
}
fcgi_env_add(p->fcgi_env, CONST_STR_LEN("GATEWAY_INTERFACE"), CONST_STR_LEN("CGI/1.1"));
ltostr(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(p->fcgi_env, CONST_STR_LEN("SERVER_PORT"), buf, strlen(buf));
/* get the server-side of the connection to the client */
our_addr_len = sizeof(our_addr);
if (-1 == getsockname(con->fd, &(our_addr.plain), &our_addr_len)) {
s = inet_ntop_cache_get_ip(srv, &(srv_sock->addr));
} else {
s = inet_ntop_cache_get_ip(srv, &(our_addr));
}
fcgi_env_add(p->fcgi_env, CONST_STR_LEN("SERVER_ADDR"), s, strlen(s));
ltostr(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(p->fcgi_env, CONST_STR_LEN("REMOTE_PORT"), buf, strlen(buf));
s = inet_ntop_cache_get_ip(srv, &(con->dst_addr));
fcgi_env_add(p->fcgi_env, CONST_STR_LEN("REMOTE_ADDR"), s, strlen(s));
if (!buffer_is_empty(con->authed_user)) {
fcgi_env_add(p->fcgi_env, CONST_STR_LEN("REMOTE_USER"),
CONST_BUF_LEN(con->authed_user));
}
if (con->request.content_length > 0 && host->mode != FCGI_AUTHORIZER) {
/* CGI-SPEC 6.1.2 and FastCGI spec 6.3 */
/* request.content_length < SSIZE_MAX, see request.c */
ltostr(buf, con->request.content_length);
fcgi_env_add(p->fcgi_env, CONST_STR_LEN("CONTENT_LENGTH"), buf, strlen(buf));
}
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(p->fcgi_env, CONST_STR_LEN("SCRIPT_NAME"), CONST_BUF_LEN(con->uri.path));
if (!buffer_is_empty(con->request.pathinfo)) {
fcgi_env_add(p->fcgi_env, CONST_STR_LEN("PATH_INFO"), CONST_BUF_LEN(con->request.pathinfo));
/* PATH_TRANSLATED is only defined if PATH_INFO is set */
if (!buffer_is_empty(host->docroot)) {
buffer_copy_string_buffer(p->path, host->docroot);
} else {
buffer_copy_string_buffer(p->path, con->physical.doc_root);
}
buffer_append_string_buffer(p->path, con->request.pathinfo);
fcgi_env_add(p->fcgi_env, CONST_STR_LEN("PATH_TRANSLATED"), CONST_BUF_LEN(p->path));
} else {
fcgi_env_add(p->fcgi_env, CONST_STR_LEN("PATH_INFO"), CONST_STR_LEN(""));
}
}
/*
* 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_is_empty(host->docroot)) {
/*
* rewrite SCRIPT_FILENAME
*
*/
buffer_copy_string_buffer(p->path, host->docroot);
buffer_append_string_buffer(p->path, con->uri.path);
fcgi_env_add(p->fcgi_env, CONST_STR_LEN("SCRIPT_FILENAME"), CONST_BUF_LEN(p->path));
fcgi_env_add(p->fcgi_env, CONST_STR_LEN("DOCUMENT_ROOT"), CONST_BUF_LEN(host->docroot));
} else {
buffer_copy_string_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(p->fcgi_env, CONST_STR_LEN("SCRIPT_FILENAME"), CONST_BUF_LEN(p->path));
fcgi_env_add(p->fcgi_env, CONST_STR_LEN("DOCUMENT_ROOT"), CONST_BUF_LEN(con->physical.doc_root));
}
fcgi_env_add(p->fcgi_env, CONST_STR_LEN("REQUEST_URI"), CONST_BUF_LEN(con->request.orig_uri));
if (!buffer_is_equal(con->request.uri, con->request.orig_uri)) {
fcgi_env_add(p->fcgi_env, CONST_STR_LEN("REDIRECT_URI"), CONST_BUF_LEN(con->request.uri));
}
if (!buffer_is_empty(con->uri.query)) {
fcgi_env_add(p->fcgi_env, CONST_STR_LEN("QUERY_STRING"), CONST_BUF_LEN(con->uri.query));
} else {
fcgi_env_add(p->fcgi_env, CONST_STR_LEN("QUERY_STRING"), CONST_STR_LEN(""));
}
s = get_http_method_name(con->request.http_method);
fcgi_env_add(p->fcgi_env, CONST_STR_LEN("REQUEST_METHOD"), s, strlen(s));
fcgi_env_add(p->fcgi_env, CONST_STR_LEN("REDIRECT_STATUS"), CONST_STR_LEN("200")); /* if php is compiled with --force-redirect */
s = get_http_version_name(con->request.http_version);
fcgi_env_add(p->fcgi_env, CONST_STR_LEN("SERVER_PROTOCOL"), s, strlen(s));
#ifdef USE_OPENSSL
if (srv_sock->is_ssl) {
fcgi_env_add(p->fcgi_env, CONST_STR_LEN("HTTPS"), CONST_STR_LEN("on"));
}
#endif
fcgi_env_add_request_headers(srv, con, p);
fcgi_header(&(header), FCGI_PARAMS, request_id, p->fcgi_env->used, 0);
buffer_append_memory(hctx->write_buffer, (const char *)&header, sizeof(header));
buffer_append_memory(hctx->write_buffer, (const char *)p->fcgi_env->ptr, p->fcgi_env->used);
fcgi_header(&(header), FCGI_PARAMS, request_id, 0, 0);
buffer_append_memory(hctx->write_buffer, (const char *)&header, sizeof(header));
/* send FCGI_STDIN */
/* something to send ? */
for (offset = 0; offset != con->request.content_length; ) {
/* send chunks of 1024 bytes */
size_t toWrite = con->request.content_length - offset > 4096 ? 4096 : con->request.content_length - offset;
fcgi_header(&(header), FCGI_STDIN, request_id, toWrite, 0);
buffer_append_memory(hctx->write_buffer, (const char *)&header, sizeof(header));
buffer_append_memory(hctx->write_buffer, (const char *)(con->request.content->ptr + offset), toWrite);
offset += toWrite;
}
/* terminate STDIN */
fcgi_header(&(header), FCGI_STDIN, request_id, 0, 0);
buffer_append_memory(hctx->write_buffer, (const char *)&header, sizeof(header));
#if 0
for (i = 0; i < hctx->write_buffer->used; i++) {
fprintf(stderr, "%02x ", hctx->write_buffer->ptr[i]);
if ((i+1) % 16 == 0) {
size_t j;
for (j = i-15; j <= i; j++) {
fprintf(stderr, "%c",
isprint((unsigned char)hctx->write_buffer->ptr[j]) ? hctx->write_buffer->ptr[j] : '.');
}
fprintf(stderr, "\n");
}
}
#endif
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;
UNUSED(srv);
buffer_copy_string_buffer(p->parse_response, in);
/* search for \n */
for (s = p->parse_response->ptr; NULL != (ns = strchr(s, '\n')); s = ns + 1) {
char *key, *value;
int key_len;
data_string *ds;
/* a good day. Someone has read the specs and is sending a \r\n to us */
if (ns > p->parse_response->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)) {
con->http_status = strtol(value, NULL, 10);
con->parsed_response |= HTTP_STATUS;
}
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 14:
if (0 == strncasecmp(key, "Content-Length", key_len)) {
con->response.content_length = strtol(value, NULL, 10);
con->parsed_response |= HTTP_CONTENT_LENGTH;
if (con->response.content_length < 0) con->response.content_length = 0;
}
break;
default:
break;
}
}
/* CGI/1.1 rev 03 - 7.2.1.2 */
if ((con->parsed_response & HTTP_LOCATION) &&
!(con->parsed_response & HTTP_STATUS)) {
con->http_status = 302;
}
return 0;
}
static int fcgi_demux_response(server *srv, handler_ctx *hctx) {
ssize_t len;
int fin = 0;
int b;
ssize_t r;
plugin_data *p = hctx->plugin_data;
connection *con = hctx->remote_conn;
int fcgi_fd = hctx->fd;
fcgi_extension_host *host= hctx->host;
fcgi_proc *proc = hctx->proc;
/*
* check how much we have to read
*/
if (ioctl(hctx->fd, FIONREAD, &b)) {
log_error_write(srv, __FILE__, __LINE__, "sd",
"unexpected end-of-file (perhaps the fastcgi process died):",
fcgi_fd);
return -1;
}
/* init read-buffer */
if (hctx->rb == NULL) {
hctx->rb = calloc(1, sizeof(*hctx->rb));
}
if (b > 0) {
if (hctx->rb->size == 0) {
hctx->rb->size = b;
hctx->rb->ptr = malloc(hctx->rb->size * sizeof(*hctx->rb->ptr));
} else if (hctx->rb->size < hctx->rb->used + b) {
hctx->rb->size += b;
hctx->rb->ptr = realloc(hctx->rb->ptr, hctx->rb->size * sizeof(*hctx->rb->ptr));
}
/* append to read-buffer */
if (-1 == (r = read(hctx->fd, hctx->rb->ptr + hctx->rb->used, b))) {
log_error_write(srv, __FILE__, __LINE__, "sds",
"unexpected end-of-file (perhaps the fastcgi process died):",
fcgi_fd, strerror(errno));
return -1;
}
/* this should be catched by the b > 0 above */
assert(r);
hctx->rb->used += r;
} else {
log_error_write(srv, __FILE__, __LINE__, "ssdsdsd",
"unexpected end-of-file (perhaps the fastcgi process died):",
"pid:", proc->pid,
"fcgi-fd:", fcgi_fd,
"remote-fd:", con->fd);
return -1;
}
/* parse all fcgi packets
*
* start: hctx->rb->ptr
* end : hctx->rb->ptr + hctx->rb->used
*
*/
while (fin == 0) {
size_t request_id;
if (hctx->response_len == 0) {
FCGI_Header *header;
if (hctx->rb->used - hctx->rb->offset < sizeof(*header)) {
/* didn't get the full header packet (most often 0),
* but didn't recieved the final packet either
*
* we will come back later and finish everything
*
*/
hctx->delayed = 1;
#if 0
log_error_write(srv, __FILE__, __LINE__, "sddd", "didn't get the full header: ",
hctx->rb->used - hctx->rb->offset, sizeof(*header),
fcgi_fd
);
#endif
break;
}
#if 0
fprintf(stderr, "fcgi-version: %02x\n", hctx->rb->ptr[hctx->rb->offset]);
#endif
header = (FCGI_Header *)(hctx->rb->ptr + hctx->rb->offset);
hctx->rb->offset += sizeof(*header);
len = (header->contentLengthB0 | (header->contentLengthB1 << 8)) + header->paddingLength;
request_id = (header->requestIdB0 | (header->requestIdB1 << 8));
hctx->response_len = len;
hctx->response_request_id = request_id;
hctx->response_type = header->type;
hctx->response_padding = header->paddingLength;
#if 0
log_error_write(srv, __FILE__, __LINE__, "sddd", "offset: ",
fcgi_fd, hctx->rb->offset, header->type
);
#endif
} else {
len = hctx->response_len;
}
if (hctx->rb->used - hctx->rb->offset < hctx->response_len) {
/* we are not finished yet */
break;
}
hctx->response->ptr = hctx->rb->ptr + hctx->rb->offset;
hctx->rb->offset += hctx->response_len;
#if 0
log_error_write(srv, __FILE__, __LINE__, "sdd", "offset: ",
fcgi_fd, hctx->rb->offset
);
#endif
/* remove padding */
#if 0
hctx->response->ptr[hctx->response_len - hctx->response_padding] = '\0';
#endif
hctx->response->used = hctx->response_len - hctx->response_padding + 1;
/* mark the fast-cgi packet as finished */
hctx->response_len = 0;
switch(hctx->response_type) {
case FCGI_STDOUT:
if (len) {
#if 0
log_error_write(srv, __FILE__, __LINE__, "sdb", "len", len, hctx->response);
#endif
if (0 == con->got_response) {
con->got_response = 1;
buffer_prepare_copy(hctx->response_header, 128);
}
if (0 == con->file_started) {
char *c;
size_t hlen;
/* search for header terminator
*
* if we start with \r\n check if last packet terminated with \r\n
* if we start with \n check if last packet terminated with \n
* search for \r\n\r\n
* search for \n\n
*/
if (hctx->response->used > 2 &&
hctx->response->ptr[0] == '\r' &&
hctx->response->ptr[1] == '\n' &&
hctx->response_header->used > 3 &&
hctx->response_header->ptr[hctx->response_header->used - 3] == '\r' &&
hctx->response_header->ptr[hctx->response_header->used - 2] == '\n') {
hlen = 2;
c = hctx->response->ptr + 2;
} else if (hctx->response->used > 2 &&
hctx->response->ptr[0] == '\n' &&
hctx->response_header->used > 2 &&
hctx->response_header->ptr[hctx->response_header->used - 2] == '\n') {
hlen = 1;
c = hctx->response->ptr + 1;
} else if (NULL != (c = buffer_search_string_len(hctx->response, "\r\n\r\n", 4))) {
c += 4;
hlen = c - hctx->response->ptr;
} else if (NULL != (c = buffer_search_string_len(hctx->response, "\n\n", 2))) {
c += 2;
hlen = c - hctx->response->ptr;
}
if (c != NULL) {
size_t blen = hctx->response->used - hlen - 1;
/* found */
buffer_append_string_len(hctx->response_header, hctx->response->ptr, hlen);
#if 0
log_error_write(srv, __FILE__, __LINE__, "ss", "Header:", hctx->response_header->ptr);
#endif
/* parse the response header */
fcgi_response_parse(srv, con, p, hctx->response_header);
if (host->mode != FCGI_AUTHORIZER ||
!(con->http_status == 0 ||
con->http_status == 200)) {
/* enable chunked-transfer-encoding */
if (con->request.http_version == HTTP_VERSION_1_1 &&
!(con->parsed_response & HTTP_CONTENT_LENGTH)) {
con->response.transfer_encoding = HTTP_TRANSFER_ENCODING_CHUNKED;
}
con->file_started = 1;
if (blen) {
http_chunk_append_mem(srv, con, c, blen + 1);
joblist_append(srv, con);
#if 0
log_error_write(srv, __FILE__, __LINE__, "sd", "body-len", blen);
#endif
}
}
} else {
/* copy everything */
buffer_append_string_buffer(hctx->response_header, hctx->response);
}
} else {
if (host->mode != FCGI_AUTHORIZER ||
!(con->http_status == 0 ||
con->http_status == 200)) {
http_chunk_append_mem(srv, con, hctx->response->ptr, hctx->response->used);
joblist_append(srv, con);
}
#if 0
log_error_write(srv, __FILE__, __LINE__, "sd", "body-len", hctx->response->used);
#endif
}
} else {
/* finished */
}
break;
case FCGI_STDERR:
log_error_write(srv, __FILE__, __LINE__, "sb",
"FastCGI-stderr:", hctx->response);
break;
case FCGI_END_REQUEST:
con->file_finished = 1;
if (host->mode != FCGI_AUTHORIZER ||
!(con->http_status == 0 ||
con->http_status == 200)) {
/* send chunk-end if nesseary */
http_chunk_append_mem(srv, con, NULL, 0);
joblist_append(srv, con);
}
fin = 1;
break;
default:
log_error_write(srv, __FILE__, __LINE__, "sd",
"FastCGI: header.type not handled: ", hctx->response_type);
break;
}
}
hctx->response->ptr = NULL;
return fin;
}
int fcgi_proclist_sort_up(server *srv, fcgi_extension_host *host, fcgi_proc *proc) {
fcgi_proc *p;
UNUSED(srv);
/* we have been the smallest of the current list
* and we want to insert the node sorted as soon
* possible
*
* 1 0 0 0 1 1 1
* | ^
* | |
* +------+
*
*/
/* nothing to sort, only one element */
if (host->first == proc && proc->next == NULL) return 0;
for (p = proc; p->next && p->next->load < proc->load; p = p->next);
/* no need to move something
*
* 1 2 2 2 3 3 3
* ^
* |
* +
*
*/
if (p == proc) return 0;
if (host->first == proc) {
/* we have been the first elememt */
host->first = proc->next;
host->first->prev = NULL;
}
/* disconnect proc */
if (proc->prev) proc->prev->next = proc->next;
if (proc->next) proc->next->prev = proc->prev;
/* proc should be right of p */
proc->next = p->next;
proc->prev = p;
if (p->next) p->next->prev = proc;
p->next = proc;
#if 0
for(p = host->first; p; p = p->next) {
log_error_write(srv, __FILE__, __LINE__, "dd",
p->pid, p->load);
}
#else
UNUSED(srv);
#endif
return 0;
}
int fcgi_proclist_sort_down(server *srv, fcgi_extension_host *host, fcgi_proc *proc) {
fcgi_proc *p;
UNUSED(srv);
/* we have been the smallest of the current list
* and we want to insert the node sorted as soon
* possible
*
* 0 0 0 0 1 0 1
* ^ |
* | |
* +----------+
*
*
* the basic is idea is:
* - the last active fastcgi process should be still
* in ram and is not swapped out yet
* - processes that are not reused will be killed
* after some time by the trigger-handler
* - remember it as:
* everything > 0 is hot
* all unused procs are colder the more right they are
* ice-cold processes are propably unused since more
* than 'unused-timeout', are swaped out and won't be
* reused in the next seconds anyway.
*
*/
/* nothing to sort, only one element */
if (host->first == proc && proc->next == NULL) return 0;
for (p = host->first; p != proc && p->load < proc->load; p = p->next);
/* no need to move something
*
* 1 2 2 2 3 3 3
* ^
* |
* +
*
*/
if (p == proc) return 0;
/* we have to move left. If we are already the first element
* we are done */
if (host->first == proc) return 0;
/* release proc */
if (proc->prev) proc->prev->next = proc->next;
if (proc->next) proc->next->prev = proc->prev;
/* proc should be left of p */
proc->next = p;
proc->prev = p->prev;
if (p->prev) p->prev->next = proc;
p->prev = proc;
if (proc->prev == NULL) host->first = proc;
#if 0
for(p = host->first; p; p = p->next) {
log_error_write(srv, __FILE__, __LINE__, "dd",
p->pid, p->load);
}
#else
UNUSED(srv);
#endif
return 0;
}
static int fcgi_restart_dead_procs(server *srv, plugin_data *p, fcgi_extension_host *host) {
fcgi_proc *proc;
for (proc = host->first; proc; proc = proc->next) {
if (p->conf.debug) {
log_error_write(srv, __FILE__, __LINE__, "sbdbdddd",
"proc:",
host->host, proc->port,
proc->socket,
proc->state,
proc->is_local,
proc->load,
proc->pid);
}
if (0 == proc->is_local) {
/*
* external servers might get disabled
*
* enable the server again, perhaps it is back again
*/
if ((proc->state == PROC_STATE_DISABLED) &&
(srv->cur_ts - proc->disable_ts > host->disable_time)) {
proc->state = PROC_STATE_RUNNING;
host->active_procs++;
log_error_write(srv, __FILE__, __LINE__, "sbdb",
"fcgi-server re-enabled:",
host->host, host->port,
host->unixsocket);
}
} else {
/* the child should not terminate at all */
int status;
if (proc->state == PROC_STATE_DIED_WAIT_FOR_PID) {
switch(waitpid(proc->pid, &status, WNOHANG)) {
case 0:
/* child is still alive */
break;
case -1:
break;
default:
if (WIFEXITED(status)) {
#if 0
log_error_write(srv, __FILE__, __LINE__, "sdsd",
"child exited, pid:", proc->pid,
"status:", WEXITSTATUS(status));
#endif
} else if (WIFSIGNALED(status)) {
log_error_write(srv, __FILE__, __LINE__, "sd",
"child signaled:",
WTERMSIG(status));
} else {
log_error_write(srv, __FILE__, __LINE__, "sd",
"child died somehow:",
status);
}
proc->state = PROC_STATE_DIED;
break;
}
}
/*
* local servers might died, but we restart them
*
*/
if (proc->state == PROC_STATE_DIED &&
proc->load == 0) {
/* restart the child */
if (p->conf.debug) {
log_error_write(srv, __FILE__, __LINE__, "ssdsbsdsd",
"--- fastcgi spawning",
"\n\tport:", host->port,
"\n\tsocket", host->unixsocket,
"\n\tcurrent:", 1, "/", host->min_procs);
}
if (fcgi_spawn_connection(srv, p, host, proc)) {
log_error_write(srv, __FILE__, __LINE__, "s",
"ERROR: spawning fcgi failed.");
return HANDLER_ERROR;
}
fcgi_proclist_sort_down(srv, host, proc);
}
}
}
return 0;
}
static handler_t fcgi_write_request(server *srv, handler_ctx *hctx) {
plugin_data *p = hctx->plugin_data;
fcgi_extension_host *host= hctx->host;
connection *con = hctx->remote_conn;
int r;
/* sanity check */
if (!host ||
((!host->host->used || !host->port) && !host->unixsocket->used)) {
log_error_write(srv, __FILE__, __LINE__, "sxddd",
"write-req: error",
host,
host->host->used,
host