static void connection_handle_response_end_state(server *srv, connection *con) {
/* log the request */
/* (even if error, connection dropped, still write to access log if http_status) */
if (con->http_status) {
plugins_call_handle_request_done(srv, con);
}
if (con->state != CON_STATE_ERROR) srv->con_written++;
if (con->request.content_length != con->request_content_queue->bytes_in
|| con->state == CON_STATE_ERROR) {
/* request body is present and has not been read completely */
con->keep_alive = 0;
}
if (con->keep_alive) {
connection_reset(srv, con);
#if 0
con->request_start = srv->cur_ts;
con->read_idle_ts = srv->cur_ts;
#endif
connection_set_state(srv, con, CON_STATE_REQUEST_START);
} else {
connection_handle_shutdown(srv, con);
}
}
int connection_state_machine(server *srv, connection *con) {
int done = 0, r;
#ifdef USE_OPENSSL
server_socket *srv_sock = con->srv_socket;
#endif
chunkqueue *dst_cq = con->request_content_queue;
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sds",
"state at start",
con->fd,
connection_get_state(con->state));
}
while (done == 0) {
size_t ostate = con->state;
int b;
switch (con->state) {
case CON_STATE_REQUEST_START: /* transient */
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sds",
"state for fd", con->fd, connection_get_state(con->state));
}
con->request_start = srv->cur_ts;
con->read_idle_ts = srv->cur_ts;
con->request_count++;
con->loops_per_request = 0;
connection_set_state(srv, con, CON_STATE_READ);
/* patch con->conf.is_ssl if the connection is a ssl-socket already */
#ifdef USE_OPENSSL
con->conf.is_ssl = srv_sock->is_ssl;
#endif
break;
case CON_STATE_REQUEST_END: /* transient */
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sds",
"state for fd", con->fd, connection_get_state(con->state));
}
if (http_request_parse(srv, con)) {
/* we have to read some data from the POST request */
connection_set_state(srv, con, CON_STATE_READ_POST);
break;
}
connection_set_state(srv, con, CON_STATE_HANDLE_REQUEST);
break;
case CON_STATE_HANDLE_REQUEST:
/*
* the request is parsed
*
* decided what to do with the request
* -
*
*
*/
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sds",
"state for fd", con->fd, connection_get_state(con->state));
}
switch (r = http_response_prepare(srv, con)) {
case HANDLER_FINISHED:
if (con->mode == DIRECT) {
if (con->http_status == 404 ||
con->http_status == 403) {
/* 404 error-handler */
if (con->in_error_handler == 0 &&
(!buffer_is_empty(con->conf.error_handler) ||
!buffer_is_empty(con->error_handler))) {
/* call error-handler */
con->error_handler_saved_status = con->http_status;
//log_error_write(srv, __FILE__, __LINE__, "s", "http_status set to 0");
con->http_status = 0;
if (buffer_is_empty(con->error_handler)) {
buffer_copy_string_buffer(con->request.uri, con->conf.error_handler);
} else {
buffer_copy_string_buffer(con->request.uri, con->error_handler);
}
buffer_reset(con->physical.path);
con->in_error_handler = 1;
connection_set_state(srv, con, CON_STATE_HANDLE_REQUEST);
done = -1;
break;
} else if (con->in_error_handler) {
/* error-handler is a 404 */
con->http_status = con->error_handler_saved_status;
}
} else if (con->in_error_handler) {
/* error-handler is back and has generated content */
/* if Status: was set, take it otherwise use 200 */
}
}
if (con->http_status == 0) con->http_status = 200;
/* we have something to send, go on */
connection_set_state(srv, con, CON_STATE_RESPONSE_START);
break;
case HANDLER_WAIT_FOR_FD:
srv->want_fds++;
fdwaitqueue_append(srv, con);
connection_set_state(srv, con, CON_STATE_READ_POST);
break;
case HANDLER_COMEBACK:
done = -1;
case HANDLER_WAIT_FOR_EVENT:
/* come back here */
connection_set_state(srv, con, CON_STATE_HANDLE_REQUEST);
break;
case HANDLER_ERROR:
/* something went wrong */
connection_set_state(srv, con, CON_STATE_ERROR);
break;
default:
log_error_write(srv, __FILE__, __LINE__, "sdd", "unknown ret-value: ", con->fd, r);
break;
}
break;
case CON_STATE_RESPONSE_START:
/*
* the decision is done
* - create the HTTP-Response-Header
*
*/
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sds",
"state for fd", con->fd, connection_get_state(con->state));
}
if (-1 == connection_handle_write_prepare(srv, con)) {
connection_set_state(srv, con, CON_STATE_ERROR);
break;
}
if (con->http_status = 416){
//log_error_write(srv, __FILE__, __LINE__, "s", "Resetting read_queue");
chunkqueue_reset(con->read_queue);
}
connection_set_state(srv, con, CON_STATE_WRITE);
break;
case CON_STATE_RESPONSE_END: /* transient */
/* log the request */
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sds",
"state for fd", con->fd, connection_get_state(con->state));
}
plugins_call_handle_request_done(srv, con);
srv->con_written++;
if (con->keep_alive) {
connection_set_state(srv, con, CON_STATE_REQUEST_START);
#if 0
con->request_start = srv->cur_ts;
con->read_idle_ts = srv->cur_ts;
#endif
} else {
switch(r = plugins_call_handle_connection_close(srv, con)) {
case HANDLER_GO_ON:
case HANDLER_FINISHED:
break;
default:
log_error_write(srv, __FILE__, __LINE__, "sd", "unhandling return value", r);
break;
}
#ifdef USE_OPENSSL
if (srv_sock->is_ssl) {
switch (SSL_shutdown(con->ssl)) {
case 1:
/* done */
break;
case 0:
/* wait for fd-event
*
* FIXME: wait for fdevent and call SSL_shutdown again
*
*/
break;
default:
log_error_write(srv, __FILE__, __LINE__, "ss", "SSL:",
ERR_error_string(ERR_get_error(), NULL));
}
}
#endif
connection_close(srv, con);
srv->con_closed++;
}
connection_reset(srv, con);
break;
case CON_STATE_CONNECT:
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sds",
"state for fd", con->fd, connection_get_state(con->state));
}
/*
if (con->read_queue != NULL) {
chunk *c;
size_t avail = 0;
for (c= con->read_queue->first; c != NULL; c = c->next) {
if(c->type == MEM_CHUNK)
avail += c->mem->used - c->offset -1;
}
log_error_write(srv, __FILE__, __LINE__, "sd", "con->read_queue is not empty!", avail);
}*/
chunkqueue_reset(con->read_queue);
con->request_count = 0;
break;
case CON_STATE_CLOSE:
//log_error_write(srv, __FILE__, __LINE__, "so", "con->range_offset", con->range_offset);
//log_error_write(srv, __FILE__, __LINE__, "sdsd", "CON_STATE_ERROR: Bytes in", dst_cq->bytes_in, "Bytes out", dst_cq->bytes_out);
/* Flush out any data that is currently sitting in the chunqueue */
if ((dst_cq->bytes_in - dst_cq->bytes_out) > 0) {
log_error_write(srv, __FILE__, __LINE__, "sd", "Flush data, handle remaining chunks", dst_cq->bytes_in);
connection_set_state(srv, con, CON_STATE_HANDLE_REQUEST);
break;
}
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sds",
"state for fd", con->fd, connection_get_state(con->state));
}
if (con->keep_alive) {
if (ioctl(con->fd, FIONREAD, &b)) {
log_error_write(srv, __FILE__, __LINE__, "ss",
"ioctl() failed", strerror(errno));
}
if (b > 0) {
char buf[1024];
log_error_write(srv, __FILE__, __LINE__, "sdd",
"CLOSE-read()", con->fd, b);
/* */
read(con->fd, buf, sizeof(buf));
} else {
/* nothing to read */
con->close_timeout_ts = 0;
}
} else {
con->close_timeout_ts = 0;
}
if (srv->cur_ts - con->close_timeout_ts > 1) {
connection_close(srv, con);
log_error_write(srv, __FILE__, __LINE__, "so", "con->range_offset", con->range_offset);
log_error_write(srv, __FILE__, __LINE__, "sdsd", "CON_STATE_ERROR: Bytes in", dst_cq->bytes_in, "Bytes out", dst_cq->bytes_out);
/* Flush out any data that is currently sitting in the chunqueue */
if ((dst_cq->bytes_in - dst_cq->bytes_out) > 0) {
log_error_write(srv, __FILE__, __LINE__, "sd", "Flush data, handle remaining chunks", dst_cq->bytes_in);
connection_set_state(srv, con, CON_STATE_HANDLE_REQUEST);
break;
}
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sd",
"connection closed for fd", con->fd);
}
}
break;
case CON_STATE_READ_POST:
case CON_STATE_READ:
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sds",
"state for fd", con->fd, connection_get_state(con->state));
}
connection_handle_read_state(srv, con);
break;
case CON_STATE_WRITE:
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sds",
"state for fd", con->fd, connection_get_state(con->state));
}
/* only try to write if we have something in the queue */
if (!chunkqueue_is_empty(con->write_queue)) {
#if 0
log_error_write(srv, __FILE__, __LINE__, "dsd",
con->fd,
"packets to write:",
con->write_queue->used);
#endif
}
if (!chunkqueue_is_empty(con->write_queue) && con->is_writable) {
if (-1 == connection_handle_write(srv, con)) {
log_error_write(srv, __FILE__, __LINE__, "ds",
con->fd,
"handle write failed.");
connection_set_state(srv, con, CON_STATE_ERROR);
} else if (con->state == CON_STATE_WRITE) {
con->write_request_ts = srv->cur_ts;
}
}
break;
case CON_STATE_ERROR: /* transient */
//log_error_write(srv, __FILE__, __LINE__, "so", "con->range_offset", con->range_offset);
//log_error_write(srv, __FILE__, __LINE__, "sdsd", "CON_STATE_ERROR: Bytes in", dst_cq->bytes_in, "Bytes out", dst_cq->bytes_out);
/* Flush out any data that is currently sitting in the chunqueue */
if ((dst_cq->bytes_in - dst_cq->bytes_out) > 0) {
log_error_write(srv, __FILE__, __LINE__, "sd", "Flush data, handle remaining chunks", dst_cq->bytes_in);
connection_set_state(srv, con, CON_STATE_HANDLE_REQUEST);
break;
}
/* even if the connection was drop we still have to write it to the access log */
if (con->http_status) {
plugins_call_handle_request_done(srv, con);
}
#ifdef USE_OPENSSL
if (srv_sock->is_ssl) {
int ret, ssl_r;
unsigned long err;
ERR_clear_error();
switch ((ret = SSL_shutdown(con->ssl))) {
case 1:
/* ok */
break;
case 0:
ERR_clear_error();
if (-1 != (ret = SSL_shutdown(con->ssl))) break;
/* fall through */
default:
switch ((ssl_r = SSL_get_error(con->ssl, ret))) {
case SSL_ERROR_WANT_WRITE:
case SSL_ERROR_WANT_READ:
break;
case SSL_ERROR_SYSCALL:
/* perhaps we have error waiting in our error-queue */
if (0 != (err = ERR_get_error())) {
do {
log_error_write(srv, __FILE__, __LINE__, "sdds", "SSL:",
ssl_r, ret,
ERR_error_string(err, NULL));
} while((err = ERR_get_error()));
} else {
log_error_write(srv, __FILE__, __LINE__, "sddds", "SSL (error):",
ssl_r, ret, errno,
strerror(errno));
}
break;
default:
while((err = ERR_get_error())) {
log_error_write(srv, __FILE__, __LINE__, "sdds", "SSL:",
ssl_r, ret,
ERR_error_string(err, NULL));
}
break;
}
}
}
ERR_clear_error();
#endif
switch(con->mode) {
case DIRECT:
#if 0
log_error_write(srv, __FILE__, __LINE__, "sd",
"emergency exit: direct",
con->fd);
#endif
break;
default:
switch(r = plugins_call_handle_connection_close(srv, con)) {
case HANDLER_GO_ON:
case HANDLER_FINISHED:
break;
default:
log_error_write(srv, __FILE__, __LINE__, "");
break;
}
break;
}
connection_reset(srv, con);
/* close the connection */
if ((con->keep_alive == 1) &&
(0 == shutdown(con->fd, SHUT_WR))) {
con->close_timeout_ts = srv->cur_ts;
connection_set_state(srv, con, CON_STATE_CLOSE);
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sd",
"shutdown for fd", con->fd);
}
} else {
connection_close(srv, con);
}
con->keep_alive = 0;
srv->con_closed++;
break;
default:
log_error_write(srv, __FILE__, __LINE__, "sdd",
"unknown state:", con->fd, con->state);
break;
}
if (done == -1) {
done = 0;
} else if (ostate == con->state) {
done = 1;
}
}
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sds",
"state at exit:",
con->fd,
connection_get_state(con->state));
}
switch(con->state) {
case CON_STATE_READ_POST:
case CON_STATE_READ:
case CON_STATE_CLOSE:
fdevent_event_add(srv->ev, &(con->fde_ndx), con->fd, FDEVENT_IN);
break;
case CON_STATE_WRITE:
/* request write-fdevent only if we really need it
* - if we have data to write
* - if the socket is not writable yet
*/
if (!chunkqueue_is_empty(con->write_queue) &&
(con->is_writable == 0) &&
(con->traffic_limit_reached == 0)) {
fdevent_event_add(srv->ev, &(con->fde_ndx), con->fd, FDEVENT_OUT);
} else {
fdevent_event_del(srv->ev, &(con->fde_ndx), con->fd);
}
break;
default:
fdevent_event_del(srv->ev, &(con->fde_ndx), con->fd);
break;
}
return 0;
}
int connection_state_machine(server *srv, connection *con) {
int done = 0, r;
#ifdef USE_OPENSSL
server_socket *srv_sock = con->srv_socket;
#endif
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sds",
"state at start",
con->fd,
connection_get_state(con->state));
}
while (done == 0) {
size_t ostate = con->state;
switch (con->state) {
case CON_STATE_REQUEST_START: /* transient */
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sds",
"state for fd", con->fd, connection_get_state(con->state));
}
con->request_start = srv->cur_ts;
con->read_idle_ts = srv->cur_ts;
con->request_count++;
con->loops_per_request = 0;
connection_set_state(srv, con, CON_STATE_READ);
break;
case CON_STATE_REQUEST_END: /* transient */
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sds",
"state for fd", con->fd, connection_get_state(con->state));
}
buffer_reset(con->uri.authority);
buffer_reset(con->uri.path);
buffer_reset(con->uri.query);
buffer_reset(con->request.orig_uri);
if (http_request_parse(srv, con)) {
/* we have to read some data from the POST request */
connection_set_state(srv, con, CON_STATE_READ_POST);
break;
}
connection_set_state(srv, con, CON_STATE_HANDLE_REQUEST);
break;
case CON_STATE_HANDLE_REQUEST:
/*
* the request is parsed
*
* decided what to do with the request
* -
*
*
*/
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sds",
"state for fd", con->fd, connection_get_state(con->state));
}
switch (r = http_response_prepare(srv, con)) {
case HANDLER_FINISHED:
if (con->mode == DIRECT) {
if (con->http_status == 404 ||
con->http_status == 403) {
/* 404 error-handler */
if (con->in_error_handler == 0 &&
(!buffer_string_is_empty(con->conf.error_handler) ||
!buffer_string_is_empty(con->error_handler))) {
/* call error-handler */
con->error_handler_saved_status = con->http_status;
con->http_status = 0;
if (buffer_string_is_empty(con->error_handler)) {
buffer_copy_buffer(con->request.uri, con->conf.error_handler);
} else {
buffer_copy_buffer(con->request.uri, con->error_handler);
}
buffer_reset(con->physical.path);
con->in_error_handler = 1;
connection_set_state(srv, con, CON_STATE_HANDLE_REQUEST);
done = -1;
break;
} else if (con->in_error_handler) {
/* error-handler is a 404 */
con->http_status = con->error_handler_saved_status;
}
} else if (con->in_error_handler) {
/* error-handler is back and has generated content */
/* if Status: was set, take it otherwise use 200 */
}
}
if (con->http_status == 0) con->http_status = 200;
/* we have something to send, go on */
connection_set_state(srv, con, CON_STATE_RESPONSE_START);
break;
case HANDLER_WAIT_FOR_FD:
srv->want_fds++;
fdwaitqueue_append(srv, con);
connection_set_state(srv, con, CON_STATE_HANDLE_REQUEST);
break;
case HANDLER_COMEBACK:
done = -1;
/* fallthrough */
case HANDLER_WAIT_FOR_EVENT:
/* come back here */
connection_set_state(srv, con, CON_STATE_HANDLE_REQUEST);
break;
case HANDLER_ERROR:
/* something went wrong */
connection_set_state(srv, con, CON_STATE_ERROR);
break;
default:
log_error_write(srv, __FILE__, __LINE__, "sdd", "unknown ret-value: ", con->fd, r);
break;
}
break;
case CON_STATE_RESPONSE_START:
/*
* the decision is done
* - create the HTTP-Response-Header
*
*/
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sds",
"state for fd", con->fd, connection_get_state(con->state));
}
if (-1 == connection_handle_write_prepare(srv, con)) {
connection_set_state(srv, con, CON_STATE_ERROR);
break;
}
connection_set_state(srv, con, CON_STATE_WRITE);
break;
case CON_STATE_RESPONSE_END: /* transient */
/* log the request */
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sds",
"state for fd", con->fd, connection_get_state(con->state));
}
plugins_call_handle_request_done(srv, con);
srv->con_written++;
if (con->keep_alive) {
connection_set_state(srv, con, CON_STATE_REQUEST_START);
#if 0
con->request_start = srv->cur_ts;
con->read_idle_ts = srv->cur_ts;
#endif
} else {
switch(r = plugins_call_handle_connection_close(srv, con)) {
case HANDLER_GO_ON:
case HANDLER_FINISHED:
break;
default:
log_error_write(srv, __FILE__, __LINE__, "sd", "unhandling return value", r);
break;
}
#ifdef USE_OPENSSL
if (srv_sock->is_ssl) {
switch (SSL_shutdown(con->ssl)) {
case 1:
/* done */
break;
case 0:
/* wait for fd-event
*
* FIXME: wait for fdevent and call SSL_shutdown again
*
*/
break;
default:
log_error_write(srv, __FILE__, __LINE__, "ss", "SSL:",
ERR_error_string(ERR_get_error(), NULL));
}
}
#endif
if ((0 == shutdown(con->fd, SHUT_WR))) {
con->close_timeout_ts = srv->cur_ts;
connection_set_state(srv, con, CON_STATE_CLOSE);
} else {
connection_close(srv, con);
}
srv->con_closed++;
}
connection_reset(srv, con);
break;
case CON_STATE_CONNECT:
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sds",
"state for fd", con->fd, connection_get_state(con->state));
}
chunkqueue_reset(con->read_queue);
con->request_count = 0;
break;
case CON_STATE_CLOSE:
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sds",
"state for fd", con->fd, connection_get_state(con->state));
}
/* we have to do the linger_on_close stuff regardless
* of con->keep_alive; even non-keepalive sockets may
* still have unread data, and closing before reading
* it will make the client not see all our output.
*/
{
int len;
char buf[1024];
len = read(con->fd, buf, sizeof(buf));
if (len == 0 || (len < 0 && errno != EAGAIN && errno != EINTR) ) {
con->close_timeout_ts = srv->cur_ts - (HTTP_LINGER_TIMEOUT+1);
}
}
if (srv->cur_ts - con->close_timeout_ts > HTTP_LINGER_TIMEOUT) {
connection_close(srv, con);
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sd",
"connection closed for fd", con->fd);
}
}
break;
case CON_STATE_READ_POST:
case CON_STATE_READ:
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sds",
"state for fd", con->fd, connection_get_state(con->state));
}
connection_handle_read_state(srv, con);
break;
case CON_STATE_WRITE:
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sds",
"state for fd", con->fd, connection_get_state(con->state));
}
/* only try to write if we have something in the queue */
if (!chunkqueue_is_empty(con->write_queue)) {
if (con->is_writable) {
if (-1 == connection_handle_write(srv, con)) {
log_error_write(srv, __FILE__, __LINE__, "ds",
con->fd,
"handle write failed.");
connection_set_state(srv, con, CON_STATE_ERROR);
}
}
} else if (con->file_finished) {
connection_set_state(srv, con, CON_STATE_RESPONSE_END);
}
break;
case CON_STATE_ERROR: /* transient */
/* even if the connection was drop we still have to write it to the access log */
if (con->http_status) {
plugins_call_handle_request_done(srv, con);
}
#ifdef USE_OPENSSL
if (srv_sock->is_ssl) {
int ret, ssl_r;
unsigned long err;
ERR_clear_error();
switch ((ret = SSL_shutdown(con->ssl))) {
case 1:
/* ok */
break;
case 0:
ERR_clear_error();
if (-1 != (ret = SSL_shutdown(con->ssl))) break;
/* fall through */
default:
switch ((ssl_r = SSL_get_error(con->ssl, ret))) {
case SSL_ERROR_WANT_WRITE:
case SSL_ERROR_WANT_READ:
break;
case SSL_ERROR_SYSCALL:
/* perhaps we have error waiting in our error-queue */
if (0 != (err = ERR_get_error())) {
do {
log_error_write(srv, __FILE__, __LINE__, "sdds", "SSL:",
ssl_r, ret,
ERR_error_string(err, NULL));
} while((err = ERR_get_error()));
} else if (errno != 0) { /* ssl bug (see lighttpd ticket #2213): sometimes errno == 0 */
switch(errno) {
case EPIPE:
case ECONNRESET:
break;
default:
log_error_write(srv, __FILE__, __LINE__, "sddds", "SSL (error):",
ssl_r, ret, errno,
strerror(errno));
break;
}
}
break;
default:
while((err = ERR_get_error())) {
log_error_write(srv, __FILE__, __LINE__, "sdds", "SSL:",
ssl_r, ret,
ERR_error_string(err, NULL));
}
break;
}
}
ERR_clear_error();
}
#endif
switch(con->mode) {
case DIRECT:
#if 0
log_error_write(srv, __FILE__, __LINE__, "sd",
"emergency exit: direct",
con->fd);
#endif
break;
default:
switch(r = plugins_call_handle_connection_close(srv, con)) {
case HANDLER_GO_ON:
case HANDLER_FINISHED:
break;
default:
log_error_write(srv, __FILE__, __LINE__, "sd", "unhandling return value", r);
break;
}
break;
}
connection_reset(srv, con);
/* close the connection */
if ((0 == shutdown(con->fd, SHUT_WR))) {
con->close_timeout_ts = srv->cur_ts;
connection_set_state(srv, con, CON_STATE_CLOSE);
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sd",
"shutdown for fd", con->fd);
}
} else {
connection_close(srv, con);
}
con->keep_alive = 0;
srv->con_closed++;
break;
default:
log_error_write(srv, __FILE__, __LINE__, "sdd",
"unknown state:", con->fd, con->state);
break;
}
if (done == -1) {
done = 0;
} else if (ostate == con->state) {
done = 1;
}
}
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sds",
"state at exit:",
con->fd,
connection_get_state(con->state));
}
switch(con->state) {
case CON_STATE_READ_POST:
case CON_STATE_READ:
case CON_STATE_CLOSE:
fdevent_event_set(srv->ev, &(con->fde_ndx), con->fd, FDEVENT_IN);
break;
case CON_STATE_WRITE:
/* request write-fdevent only if we really need it
* - if we have data to write
* - if the socket is not writable yet
*/
if (!chunkqueue_is_empty(con->write_queue) &&
(con->is_writable == 0) &&
(con->traffic_limit_reached == 0)) {
fdevent_event_set(srv->ev, &(con->fde_ndx), con->fd, FDEVENT_OUT);
} else {
fdevent_event_del(srv->ev, &(con->fde_ndx), con->fd);
}
break;
default:
fdevent_event_del(srv->ev, &(con->fde_ndx), con->fd);
break;
}
return 0;
}
connection *connection_accept(server *srv, server_socket *srv_socket) {
/* accept everything */
/* search an empty place */
int cnt;
sock_addr cnt_addr;
#ifndef HAVE_LIBMTCP
socklen_t cnt_len;
#endif
/* accept it and register the fd */
/**
* check if we can still open a new connections
*
* see #1216
*/
if (srv->conns->used >= srv->max_conns) {
return NULL;
}
#ifdef HAVE_LIBMTCP
if (-1 == (cnt = mtcp_accept(srv->mctx, srv_socket->fd, NULL, NULL))) {
#else
cnt_len = sizeof(cnt_addr);
if (-1 == (cnt = accept(srv_socket->fd, (struct sockaddr *) &cnt_addr, &cnt_len))) {
#endif
switch (errno) {
case EAGAIN:
#if EWOULDBLOCK != EAGAIN
case EWOULDBLOCK:
#endif
case EINTR:
/* we were stopped _before_ we had a connection */
case ECONNABORTED: /* this is a FreeBSD thingy */
/* we were stopped _after_ we had a connection */
break;
case EMFILE:
/* out of fds */
break;
default:
log_error_write(srv, __FILE__, __LINE__, "ssd", "accept failed:", strerror(errno), errno);
}
return NULL;
} else {
connection *con;
srv->cur_fds++;
/* ok, we have the connection, register it */
#if 0
log_error_write(srv, __FILE__, __LINE__, "sd",
"appected()", cnt);
#endif
srv->con_opened++;
con = connections_get_new_connection(srv);
con->fd = cnt;
con->fde_ndx = -1;
#if 0
gettimeofday(&(con->start_tv), NULL);
#endif
fdevent_register(srv->ev, con->fd, connection_handle_fdevent, con);
connection_set_state(srv, con, CON_STATE_REQUEST_START);
con->connection_start = srv->cur_ts;
con->dst_addr = cnt_addr;
buffer_copy_string(con->dst_addr_buf, inet_ntop_cache_get_ip(srv, &(con->dst_addr)));
con->srv_socket = srv_socket;
if (-1 == (fdevent_fcntl_set(srv->ev, con->fd))) {
log_error_write(srv, __FILE__, __LINE__, "ss", "fcntl failed: ", strerror(errno));
return NULL;
}
#ifdef USE_OPENSSL
/* connect FD to SSL */
if (srv_socket->is_ssl) {
if (NULL == (con->ssl = SSL_new(srv_socket->ssl_ctx))) {
log_error_write(srv, __FILE__, __LINE__, "ss", "SSL:",
ERR_error_string(ERR_get_error(), NULL));
return NULL;
}
con->renegotiations = 0;
SSL_set_app_data(con->ssl, con);
SSL_set_accept_state(con->ssl);
con->conf.is_ssl=1;
if (1 != (SSL_set_fd(con->ssl, cnt))) {
log_error_write(srv, __FILE__, __LINE__, "ss", "SSL:",
ERR_error_string(ERR_get_error(), NULL));
return NULL;
}
}
#endif
return con;
}
}
int connection_state_machine(server *srv, connection *con) {
int done = 0, r;
#ifdef USE_OPENSSL
server_socket *srv_sock = con->srv_socket;
#endif
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sds",
"state at start",
con->fd,
connection_get_state(con->state));
}
while (done == 0) {
size_t ostate = con->state;
switch (con->state) {
case CON_STATE_REQUEST_START: /* transient */
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sds",
"state for fd", con->fd, connection_get_state(con->state));
}
con->request_start = srv->cur_ts;
con->read_idle_ts = srv->cur_ts;
con->request_count++;
con->loops_per_request = 0;
connection_set_state(srv, con, CON_STATE_READ);
/* patch con->conf.is_ssl if the connection is a ssl-socket already */
#ifdef USE_OPENSSL
con->conf.is_ssl = srv_sock->is_ssl;
#endif
break;
case CON_STATE_REQUEST_END: /* transient */
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sds",
"state for fd", con->fd, connection_get_state(con->state));
}
buffer_reset(con->uri.authority);
buffer_reset(con->uri.path);
buffer_reset(con->uri.query);
buffer_reset(con->request.orig_uri);
if (http_request_parse(srv, con)) {
/* we have to read some data from the POST request */
connection_set_state(srv, con, CON_STATE_READ_POST);
break;
}
connection_set_state(srv, con, CON_STATE_HANDLE_REQUEST);
break;
case CON_STATE_HANDLE_REQUEST:
/*
* the request is parsed
*
* decided what to do with the request
* -
*
*
*/
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sds",
"state for fd", con->fd, connection_get_state(con->state));
}
switch (r = http_response_prepare(srv, con)) {
case HANDLER_FINISHED:
if (con->mode == DIRECT) {
if (con->http_status == 404 ||
con->http_status == 403) {
/* 404 error-handler */
if (con->in_error_handler == 0 &&
(!buffer_is_empty(con->conf.error_handler) ||
!buffer_is_empty(con->error_handler))) {
/* call error-handler */
con->error_handler_saved_status = con->http_status;
con->http_status = 0;
if (buffer_is_empty(con->error_handler)) {
buffer_copy_string_buffer(con->request.uri, con->conf.error_handler);
} else {
buffer_copy_string_buffer(con->request.uri, con->error_handler);
}
buffer_reset(con->physical.path);
con->in_error_handler = 1;
connection_set_state(srv, con, CON_STATE_HANDLE_REQUEST);
done = -1;
break;
} else if (con->in_error_handler) {
/* error-handler is a 404 */
con->http_status = con->error_handler_saved_status;
}
} else if (con->in_error_handler) {
/* error-handler is back and has generated content */
/* if Status: was set, take it otherwise use 200 */
}
}
if (con->http_status == 0) con->http_status = 200;
/* we have something to send, go on */
connection_set_state(srv, con, CON_STATE_RESPONSE_START);
break;
case HANDLER_WAIT_FOR_FD:
srv->want_fds++;
fdwaitqueue_append(srv, con);
connection_set_state(srv, con, CON_STATE_HANDLE_REQUEST);
break;
case HANDLER_COMEBACK:
done = -1;
case HANDLER_WAIT_FOR_EVENT:
/* come back here */
connection_set_state(srv, con, CON_STATE_HANDLE_REQUEST);
break;
case HANDLER_ERROR:
/* something went wrong */
connection_set_state(srv, con, CON_STATE_ERROR);
break;
default:
log_error_write(srv, __FILE__, __LINE__, "sdd", "unknown ret-value: ", con->fd, r);
break;
}
break;
case CON_STATE_RESPONSE_START:
/*
* the decision is done
* - create the HTTP-Response-Header
*
*/
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sds",
"state for fd", con->fd, connection_get_state(con->state));
}
if (-1 == connection_handle_write_prepare(srv, con)) {
connection_set_state(srv, con, CON_STATE_ERROR);
break;
}
connection_set_state(srv, con, CON_STATE_WRITE);
break;
case CON_STATE_RESPONSE_END: /* transient */
/* log the request */
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sds",
"state for fd", con->fd, connection_get_state(con->state));
}
plugins_call_handle_request_done(srv, con);
srv->con_written++;
if (con->keep_alive) {
connection_set_state(srv, con, CON_STATE_REQUEST_START);
#if 0
con->request_start = srv->cur_ts;
con->read_idle_ts = srv->cur_ts;
#endif
} else {
switch(r = plugins_call_handle_connection_close(srv, con)) {
case HANDLER_GO_ON:
case HANDLER_FINISHED:
break;
default:
log_error_write(srv, __FILE__, __LINE__, "sd", "unhandling return value", r);
break;
}
#ifdef USE_OPENSSL
if (srv_sock->is_ssl) {
switch (SSL_shutdown(con->ssl)) {
case 1:
/* done */
break;
case 0:
/* wait for fd-event
*
* FIXME: wait for fdevent and call SSL_shutdown again
*
*/
break;
default:
log_error_write(srv, __FILE__, __LINE__, "ss", "SSL:",
ERR_error_string(ERR_get_error(), NULL));
}
}
#endif
if ((0 == shutdown(con->fd, SHUT_WR))) {
con->close_timeout_ts = srv->cur_ts;
connection_set_state(srv, con, CON_STATE_CLOSE);
} else {
connection_close(srv, con);
}
srv->con_closed++;
}
connection_reset(srv, con);
break;
case CON_STATE_CONNECT:
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sds",
"state for fd", con->fd, connection_get_state(con->state));
}
chunkqueue_reset(con->read_queue);
con->request_count = 0;
break;
case CON_STATE_CLOSE:
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sds",
"state for fd", con->fd, connection_get_state(con->state));
}
/* we have to do the linger_on_close stuff regardless
* of con->keep_alive; even non-keepalive sockets may
* still have unread data, and closing before reading
* it will make the client not see all our output.
*/
{
int len;
char buf[1024];
#ifdef HAVE_LIBMTCP
len = mtcp_read(srv->mctx, con->fd, buf, sizeof(buf));
#else
len = read(con->fd, buf, sizeof(buf));
#endif
if (len == 0 || (len < 0 && errno != EAGAIN && errno != EINTR) ) {
con->close_timeout_ts = srv->cur_ts - (HTTP_LINGER_TIMEOUT+1);
}
}
if (srv->cur_ts - con->close_timeout_ts > HTTP_LINGER_TIMEOUT) {
connection_close(srv, con);
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sd",
"connection closed for fd", con->fd);
}
}
break;
case CON_STATE_READ_POST:
case CON_STATE_READ:
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sds",
"state for fd", con->fd, connection_get_state(con->state));
}
connection_handle_read_state(srv, con);
break;
case CON_STATE_WRITE:
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sds",
"state for fd", con->fd, connection_get_state(con->state));
}
/* only try to write if we have something in the queue */
if (!chunkqueue_is_empty(con->write_queue)) {
#if 0
log_error_write(srv, __FILE__, __LINE__, "dsd",
con->fd,
"packets to write:",
con->write_queue->used);
#endif
}
if (!chunkqueue_is_empty(con->write_queue) && con->is_writable) {
if (-1 == connection_handle_write(srv, con)) {
log_error_write(srv, __FILE__, __LINE__, "ds",
con->fd,
"handle write failed.");
connection_set_state(srv, con, CON_STATE_ERROR);
}
}
break;
case CON_STATE_ERROR: /* transient */
/* even if the connection was drop we still have to write it to the access log */
if (con->http_status) {
plugins_call_handle_request_done(srv, con);
}
#ifdef USE_OPENSSL
if (srv_sock->is_ssl) {
int ret, ssl_r;
unsigned long err;
ERR_clear_error();
switch ((ret = SSL_shutdown(con->ssl))) {
case 1:
/* ok */
break;
case 0:
ERR_clear_error();
if (-1 != (ret = SSL_shutdown(con->ssl))) break;
/* fall through */
default:
switch ((ssl_r = SSL_get_error(con->ssl, ret))) {
case SSL_ERROR_WANT_WRITE:
case SSL_ERROR_WANT_READ:
break;
case SSL_ERROR_SYSCALL:
/* perhaps we have error waiting in our error-queue */
if (0 != (err = ERR_get_error())) {
do {
log_error_write(srv, __FILE__, __LINE__, "sdds", "SSL:",
ssl_r, ret,
ERR_error_string(err, NULL));
} while((err = ERR_get_error()));
} else if (errno != 0) { /* ssl bug (see lighttpd ticket #2213): sometimes errno == 0 */
switch(errno) {
case EPIPE:
case ECONNRESET:
break;
default:
log_error_write(srv, __FILE__, __LINE__, "sddds", "SSL (error):",
ssl_r, ret, errno,
strerror(errno));
break;
}
}
break;
default:
while((err = ERR_get_error())) {
log_error_write(srv, __FILE__, __LINE__, "sdds", "SSL:",
ssl_r, ret,
ERR_error_string(err, NULL));
}
break;
}
}
}
ERR_clear_error();
#endif
switch(con->mode) {
case DIRECT:
#if 0
log_error_write(srv, __FILE__, __LINE__, "sd",
"emergency exit: direct",
con->fd);
#endif
break;
default:
switch(r = plugins_call_handle_connection_close(srv, con)) {
case HANDLER_GO_ON:
case HANDLER_FINISHED:
break;
default:
log_error_write(srv, __FILE__, __LINE__, "sd", "unhandling return value", r);
break;
}
break;
}
connection_reset(srv, con);
/* close the connection */
if ((0 == shutdown(con->fd, SHUT_WR))) {
con->close_timeout_ts = srv->cur_ts;
connection_set_state(srv, con, CON_STATE_CLOSE);
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sd",
"shutdown for fd", con->fd);
}
} else {
connection_close(srv, con);
}
con->keep_alive = 0;
srv->con_closed++;
break;
default:
log_error_write(srv, __FILE__, __LINE__, "sdd",
"unknown state:", con->fd, con->state);
break;
}
if (done == -1) {
done = 0;
} else if (ostate == con->state) {
done = 1;
}
}
if (srv->srvconf.log_state_handling) {
log_error_write(srv, __FILE__, __LINE__, "sds",
"state at exit:",
con->fd,
connection_get_state(con->state));
}
switch(con->state) {
case CON_STATE_READ_POST:
case CON_STATE_READ:
case CON_STATE_CLOSE:
fdevent_event_set(srv->ev, &(con->fde_ndx), con->fd, FDEVENT_IN);
break;
case CON_STATE_WRITE:
/* request write-fdevent only if we really need it
* - if we have data to write
* - if the socket is not writable yet
*/
if (!chunkqueue_is_empty(con->write_queue) &&
(con->is_writable == 0) &&
(con->traffic_limit_reached == 0)) {
fdevent_event_set(srv->ev, &(con->fde_ndx), con->fd, FDEVENT_OUT);
} else {
fdevent_event_del(srv->ev, &(con->fde_ndx), con->fd);
}
break;
default:
fdevent_event_del(srv->ev, &(con->fde_ndx), con->fd);
break;
}
return 0;
}