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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 15:01:30 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 15:01:30 +0000
commit6beeb1b708550be0d4a53b272283e17e5e35fe17 (patch)
tree1ce8673d4aaa948e5554000101f46536a1e4cc29 /modules/http/http_core.c
parentInitial commit. (diff)
downloadapache2-6beeb1b708550be0d4a53b272283e17e5e35fe17.tar.xz
apache2-6beeb1b708550be0d4a53b272283e17e5e35fe17.zip
Adding upstream version 2.4.57.upstream/2.4.57upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'modules/http/http_core.c')
-rw-r--r--modules/http/http_core.c326
1 files changed, 326 insertions, 0 deletions
diff --git a/modules/http/http_core.c b/modules/http/http_core.c
new file mode 100644
index 0000000..c6cb473
--- /dev/null
+++ b/modules/http/http_core.c
@@ -0,0 +1,326 @@
+/* Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "apr_strings.h"
+#include "apr_thread_proc.h" /* for RLIMIT stuff */
+
+#define APR_WANT_STRFUNC
+#include "apr_want.h"
+
+#include "httpd.h"
+#include "http_config.h"
+#include "http_connection.h"
+#include "http_core.h"
+#include "http_protocol.h" /* For index_of_response(). Grump. */
+#include "http_request.h"
+
+#include "util_filter.h"
+#include "util_ebcdic.h"
+#include "ap_mpm.h"
+#include "scoreboard.h"
+
+#include "mod_core.h"
+
+/* Handles for core filters */
+AP_DECLARE_DATA ap_filter_rec_t *ap_http_input_filter_handle;
+AP_DECLARE_DATA ap_filter_rec_t *ap_http_header_filter_handle;
+AP_DECLARE_DATA ap_filter_rec_t *ap_chunk_filter_handle;
+AP_DECLARE_DATA ap_filter_rec_t *ap_http_outerror_filter_handle;
+AP_DECLARE_DATA ap_filter_rec_t *ap_byterange_filter_handle;
+
+AP_DECLARE_DATA const char *ap_multipart_boundary;
+
+/* If we are using an MPM That Supports Async Connections,
+ * use a different processing function
+ */
+static int async_mpm = 0;
+
+static const char *set_keep_alive_timeout(cmd_parms *cmd, void *dummy,
+ const char *arg)
+{
+ apr_interval_time_t timeout;
+ const char *err = ap_check_cmd_context(cmd, NOT_IN_DIR_CONTEXT);
+ if (err != NULL) {
+ return err;
+ }
+
+ /* Stolen from mod_proxy.c */
+ if (ap_timeout_parameter_parse(arg, &timeout, "s") != APR_SUCCESS)
+ return "KeepAliveTimeout has wrong format";
+ cmd->server->keep_alive_timeout = timeout;
+
+ /* We don't want to take into account whether or not KeepAliveTimeout is
+ * set for the main server, because if no http_module directive is used
+ * for a vhost, it will inherit the http_srv_cfg from the main server.
+ * However keep_alive_timeout_set helps determine whether the vhost should
+ * use its own configured timeout or the one from the vhost declared first
+ * on the same IP:port (ie. c->base_server, and the legacy behaviour).
+ */
+ if (cmd->server->is_virtual) {
+ cmd->server->keep_alive_timeout_set = 1;
+ }
+ return NULL;
+}
+
+static const char *set_keep_alive(cmd_parms *cmd, void *dummy,
+ int arg)
+{
+ const char *err = ap_check_cmd_context(cmd, NOT_IN_DIR_CONTEXT);
+ if (err != NULL) {
+ return err;
+ }
+
+ cmd->server->keep_alive = arg;
+ return NULL;
+}
+
+static const char *set_keep_alive_max(cmd_parms *cmd, void *dummy,
+ const char *arg)
+{
+ const char *err = ap_check_cmd_context(cmd, NOT_IN_DIR_CONTEXT);
+ if (err != NULL) {
+ return err;
+ }
+
+ cmd->server->keep_alive_max = atoi(arg);
+ return NULL;
+}
+
+static const command_rec http_cmds[] = {
+ AP_INIT_TAKE1("KeepAliveTimeout", set_keep_alive_timeout, NULL, RSRC_CONF,
+ "Keep-Alive timeout duration (sec)"),
+ AP_INIT_TAKE1("MaxKeepAliveRequests", set_keep_alive_max, NULL, RSRC_CONF,
+ "Maximum number of Keep-Alive requests per connection, "
+ "or 0 for infinite"),
+ AP_INIT_FLAG("KeepAlive", set_keep_alive, NULL, RSRC_CONF,
+ "Whether persistent connections should be On or Off"),
+ { NULL }
+};
+
+static const char *http_scheme(const request_rec *r)
+{
+ /*
+ * The http module shouldn't return anything other than
+ * "http" (the default) or "https".
+ */
+ if (r->server->server_scheme &&
+ (strcmp(r->server->server_scheme, "https") == 0))
+ return "https";
+
+ return "http";
+}
+
+static apr_port_t http_port(const request_rec *r)
+{
+ if (r->server->server_scheme &&
+ (strcmp(r->server->server_scheme, "https") == 0))
+ return DEFAULT_HTTPS_PORT;
+
+ return DEFAULT_HTTP_PORT;
+}
+
+static int ap_process_http_async_connection(conn_rec *c)
+{
+ request_rec *r = NULL;
+ conn_state_t *cs = c->cs;
+
+ AP_DEBUG_ASSERT(cs != NULL);
+ AP_DEBUG_ASSERT(cs->state == CONN_STATE_READ_REQUEST_LINE);
+
+ if (cs->state == CONN_STATE_READ_REQUEST_LINE) {
+ ap_update_child_status_from_conn(c->sbh, SERVER_BUSY_READ, c);
+ if (ap_extended_status) {
+ ap_set_conn_count(c->sbh, r, c->keepalives);
+ }
+ if ((r = ap_read_request(c))) {
+ if (r->status == HTTP_OK) {
+ cs->state = CONN_STATE_HANDLER;
+ if (ap_extended_status) {
+ ap_set_conn_count(c->sbh, r, c->keepalives + 1);
+ }
+ ap_update_child_status(c->sbh, SERVER_BUSY_WRITE, r);
+ ap_process_async_request(r);
+ /* After the call to ap_process_request, the
+ * request pool may have been deleted. We set
+ * r=NULL here to ensure that any dereference
+ * of r that might be added later in this function
+ * will result in a segfault immediately instead
+ * of nondeterministic failures later.
+ */
+ r = NULL;
+ }
+
+ if (cs->state != CONN_STATE_WRITE_COMPLETION &&
+ cs->state != CONN_STATE_SUSPENDED) {
+ /* Something went wrong; close the connection */
+ cs->state = CONN_STATE_LINGER;
+ }
+ }
+ else { /* ap_read_request failed - client may have closed */
+ cs->state = CONN_STATE_LINGER;
+ }
+ }
+
+ return OK;
+}
+
+static int ap_process_http_sync_connection(conn_rec *c)
+{
+ request_rec *r;
+ conn_state_t *cs = c->cs;
+ apr_socket_t *csd = NULL;
+ int mpm_state = 0;
+
+ /*
+ * Read and process each request found on our connection
+ * until no requests are left or we decide to close.
+ */
+
+ ap_update_child_status_from_conn(c->sbh, SERVER_BUSY_READ, c);
+ while ((r = ap_read_request(c)) != NULL) {
+ apr_interval_time_t keep_alive_timeout = r->server->keep_alive_timeout;
+
+ /* To preserve legacy behaviour, use the keepalive timeout from the
+ * base server (first on this IP:port) when none is explicitly
+ * configured on this server.
+ */
+ if (!r->server->keep_alive_timeout_set) {
+ keep_alive_timeout = c->base_server->keep_alive_timeout;
+ }
+
+ if (r->status == HTTP_OK) {
+ if (cs)
+ cs->state = CONN_STATE_HANDLER;
+ ap_update_child_status(c->sbh, SERVER_BUSY_WRITE, r);
+ ap_process_request(r);
+ /* After the call to ap_process_request, the
+ * request pool will have been deleted. We set
+ * r=NULL here to ensure that any dereference
+ * of r that might be added later in this function
+ * will result in a segfault immediately instead
+ * of nondeterministic failures later.
+ */
+ r = NULL;
+ }
+
+ if (c->keepalive != AP_CONN_KEEPALIVE || c->aborted)
+ break;
+
+ ap_update_child_status(c->sbh, SERVER_BUSY_KEEPALIVE, NULL);
+
+ if (ap_mpm_query(AP_MPMQ_MPM_STATE, &mpm_state)) {
+ break;
+ }
+
+ if (mpm_state == AP_MPMQ_STOPPING) {
+ break;
+ }
+
+ if (!csd) {
+ csd = ap_get_conn_socket(c);
+ }
+ apr_socket_opt_set(csd, APR_INCOMPLETE_READ, 1);
+ apr_socket_timeout_set(csd, keep_alive_timeout);
+ /* Go straight to select() to wait for the next request */
+ }
+
+ return OK;
+}
+
+static int ap_process_http_connection(conn_rec *c)
+{
+ if (async_mpm && !c->clogging_input_filters) {
+ return ap_process_http_async_connection(c);
+ }
+ else {
+ return ap_process_http_sync_connection(c);
+ }
+}
+
+static int http_create_request(request_rec *r)
+{
+ if (!r->main && !r->prev) {
+ ap_add_output_filter_handle(ap_byterange_filter_handle,
+ NULL, r, r->connection);
+ ap_add_output_filter_handle(ap_content_length_filter_handle,
+ NULL, r, r->connection);
+ ap_add_output_filter_handle(ap_http_header_filter_handle,
+ NULL, r, r->connection);
+ ap_add_output_filter_handle(ap_http_outerror_filter_handle,
+ NULL, r, r->connection);
+ }
+
+ return OK;
+}
+
+static int http_send_options(request_rec *r)
+{
+ if ((r->method_number == M_OPTIONS) && r->uri && (r->uri[0] == '*') &&
+ (r->uri[1] == '\0')) {
+ return DONE; /* Send HTTP pong, without Allow header */
+ }
+ return DECLINED;
+}
+
+static int http_post_config(apr_pool_t *p, apr_pool_t *plog, apr_pool_t *ptemp, server_rec *s)
+{
+ apr_uint64_t val;
+ if (ap_mpm_query(AP_MPMQ_IS_ASYNC, &async_mpm) != APR_SUCCESS) {
+ async_mpm = 0;
+ }
+ ap_random_insecure_bytes(&val, sizeof(val));
+ ap_multipart_boundary = apr_psprintf(p, "%0" APR_UINT64_T_HEX_FMT, val);
+
+ return OK;
+}
+
+static void register_hooks(apr_pool_t *p)
+{
+ ap_hook_post_config(http_post_config, NULL, NULL, APR_HOOK_MIDDLE);
+ ap_hook_process_connection(ap_process_http_connection, NULL, NULL,
+ APR_HOOK_REALLY_LAST);
+ ap_hook_map_to_storage(ap_send_http_trace,NULL,NULL,APR_HOOK_MIDDLE);
+ ap_hook_map_to_storage(http_send_options,NULL,NULL,APR_HOOK_MIDDLE);
+ ap_hook_http_scheme(http_scheme,NULL,NULL,APR_HOOK_REALLY_LAST);
+ ap_hook_default_port(http_port,NULL,NULL,APR_HOOK_REALLY_LAST);
+ ap_hook_create_request(http_create_request, NULL, NULL, APR_HOOK_REALLY_LAST);
+ ap_http_input_filter_handle =
+ ap_register_input_filter("HTTP_IN", ap_http_filter,
+ NULL, AP_FTYPE_PROTOCOL);
+ ap_http_header_filter_handle =
+ ap_register_output_filter("HTTP_HEADER", ap_http_header_filter,
+ NULL, AP_FTYPE_PROTOCOL);
+ ap_chunk_filter_handle =
+ ap_register_output_filter("CHUNK", ap_http_chunk_filter,
+ NULL, AP_FTYPE_TRANSCODE);
+ ap_http_outerror_filter_handle =
+ ap_register_output_filter("HTTP_OUTERROR", ap_http_outerror_filter,
+ NULL, AP_FTYPE_PROTOCOL);
+ ap_byterange_filter_handle =
+ ap_register_output_filter("BYTERANGE", ap_byterange_filter,
+ NULL, AP_FTYPE_PROTOCOL);
+ ap_method_registry_init(p);
+}
+
+AP_DECLARE_MODULE(http) = {
+ STANDARD20_MODULE_STUFF,
+ NULL, /* create per-directory config structure */
+ NULL, /* merge per-directory config structures */
+ NULL, /* create per-server config structure */
+ NULL, /* merge per-server config structures */
+ http_cmds, /* command apr_table_t */
+ register_hooks /* register hooks */
+};