| /* 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_optional.h> |
| #include <apr_optional_hooks.h> |
| #include <apr_strings.h> |
| #include <apr_time.h> |
| #include <apr_want.h> |
| |
| #include <httpd.h> |
| #include <http_protocol.h> |
| #include <http_request.h> |
| #include <http_log.h> |
| #include <mpm_common.h> |
| |
| #include "mod_http2.h" |
| |
| #include <nghttp2/nghttp2.h> |
| #include "h2_stream.h" |
| #include "h2_c1.h" |
| #include "h2_c2.h" |
| #include "h2_session.h" |
| #include "h2_config.h" |
| #include "h2_conn_ctx.h" |
| #include "h2_protocol.h" |
| #include "h2_mplx.h" |
| #include "h2_push.h" |
| #include "h2_request.h" |
| #include "h2_switch.h" |
| #include "h2_version.h" |
| #include "h2_bucket_beam.h" |
| |
| |
| static void h2_hooks(apr_pool_t *pool); |
| |
| AP_DECLARE_MODULE(http2) = { |
| STANDARD20_MODULE_STUFF, |
| h2_config_create_dir, /* func to create per dir config */ |
| h2_config_merge_dir, /* func to merge per dir config */ |
| h2_config_create_svr, /* func to create per server config */ |
| h2_config_merge_svr, /* func to merge per server config */ |
| h2_cmds, /* command handlers */ |
| h2_hooks, |
| #if defined(AP_MODULE_FLAG_NONE) |
| AP_MODULE_FLAG_ALWAYS_MERGE |
| #endif |
| }; |
| |
| static int h2_h2_fixups(request_rec *r); |
| |
| typedef struct { |
| unsigned int change_prio : 1; |
| unsigned int sha256 : 1; |
| unsigned int inv_headers : 1; |
| unsigned int dyn_windows : 1; |
| } features; |
| |
| static features myfeats; |
| static int mpm_warned; |
| |
| /* The module initialization. Called once as apache hook, before any multi |
| * processing (threaded or not) happens. It is typically at least called twice, |
| * see |
| * http://wiki.apache.org/httpd/ModuleLife |
| * Since the first run is just a "practise" run, we want to initialize for real |
| * only on the second try. This defeats the purpose of the first dry run a bit, |
| * since apache wants to verify that a new configuration actually will work. |
| * So if we have trouble with the configuration, this will only be detected |
| * when the server has already switched. |
| * On the other hand, when we initialize lib nghttp2, all possible crazy things |
| * might happen and this might even eat threads. So, better init on the real |
| * invocation, for now at least. |
| */ |
| static int h2_post_config(apr_pool_t *p, apr_pool_t *plog, |
| apr_pool_t *ptemp, server_rec *s) |
| { |
| void *data = NULL; |
| const char *mod_h2_init_key = "mod_http2_init_counter"; |
| nghttp2_info *ngh2; |
| apr_status_t status; |
| |
| (void)plog;(void)ptemp; |
| #ifdef H2_NG2_CHANGE_PRIO |
| myfeats.change_prio = 1; |
| #endif |
| #ifdef H2_OPENSSL |
| myfeats.sha256 = 1; |
| #endif |
| #ifdef H2_NG2_INVALID_HEADER_CB |
| myfeats.inv_headers = 1; |
| #endif |
| #ifdef H2_NG2_LOCAL_WIN_SIZE |
| myfeats.dyn_windows = 1; |
| #endif |
| |
| apr_pool_userdata_get(&data, mod_h2_init_key, s->process->pool); |
| if ( data == NULL ) { |
| ap_log_error( APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(03089) |
| "initializing post config dry run"); |
| apr_pool_userdata_set((const void *)1, mod_h2_init_key, |
| apr_pool_cleanup_null, s->process->pool); |
| return APR_SUCCESS; |
| } |
| |
| ngh2 = nghttp2_version(0); |
| ap_log_error( APLOG_MARK, APLOG_INFO, 0, s, APLOGNO(03090) |
| "mod_http2 (v%s, feats=%s%s%s%s, nghttp2 %s), initializing...", |
| MOD_HTTP2_VERSION, |
| myfeats.change_prio? "CHPRIO" : "", |
| myfeats.sha256? "+SHA256" : "", |
| myfeats.inv_headers? "+INVHD" : "", |
| myfeats.dyn_windows? "+DWINS" : "", |
| ngh2? ngh2->version_str : "unknown"); |
| |
| if (!h2_mpm_supported() && !mpm_warned) { |
| mpm_warned = 1; |
| ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(10034) |
| "The mpm module (%s) is not supported by mod_http2. The mpm determines " |
| "how things are processed in your server. HTTP/2 has more demands in " |
| "this regard and the currently selected mpm will just not do. " |
| "This is an advisory warning. Your server will continue to work, but " |
| "the HTTP/2 protocol will be inactive.", |
| h2_conn_mpm_name()); |
| } |
| |
| status = h2_protocol_init(p, s); |
| if (status == APR_SUCCESS) { |
| status = h2_switch_init(p, s); |
| } |
| |
| return status; |
| } |
| |
| static char *http2_var_lookup(apr_pool_t *, server_rec *, |
| conn_rec *, request_rec *, char *name); |
| static int http2_is_h2(conn_rec *); |
| |
| static void http2_get_num_workers(server_rec *s, int *minw, int *maxw) |
| { |
| apr_time_t tdummy; |
| |
| h2_get_workers_config(s, minw, maxw, &tdummy); |
| } |
| |
| /* Runs once per created child process. Perform any process |
| * related initionalization here. |
| */ |
| static void h2_child_init(apr_pool_t *pchild, server_rec *s) |
| { |
| apr_status_t rv; |
| |
| /* Set up our connection processing */ |
| rv = h2_c1_child_init(pchild, s); |
| if (APR_SUCCESS == rv) { |
| rv = h2_c2_child_init(pchild, s); |
| } |
| if (APR_SUCCESS != rv) { |
| ap_log_error(APLOG_MARK, APLOG_ERR, rv, s, |
| APLOGNO(02949) "initializing connection handling"); |
| } |
| } |
| |
| /* Install this module into the apache2 infrastructure. |
| */ |
| static void h2_hooks(apr_pool_t *pool) |
| { |
| static const char *const mod_ssl[] = { "mod_ssl.c", NULL}; |
| |
| APR_REGISTER_OPTIONAL_FN(http2_is_h2); |
| APR_REGISTER_OPTIONAL_FN(http2_var_lookup); |
| APR_REGISTER_OPTIONAL_FN(http2_get_num_workers); |
| |
| ap_log_perror(APLOG_MARK, APLOG_TRACE1, 0, pool, "installing hooks"); |
| |
| /* Run once after configuration is set, but before mpm children initialize. |
| */ |
| ap_hook_post_config(h2_post_config, mod_ssl, NULL, APR_HOOK_MIDDLE); |
| |
| /* Run once after a child process has been created. |
| */ |
| ap_hook_child_init(h2_child_init, NULL, NULL, APR_HOOK_MIDDLE); |
| #if AP_MODULE_MAGIC_AT_LEAST(20120211, 110) |
| ap_hook_child_stopping(h2_c1_child_stopping, NULL, NULL, APR_HOOK_MIDDLE); |
| #endif |
| |
| h2_c1_register_hooks(); |
| h2_switch_register_hooks(); |
| h2_c2_register_hooks(); |
| |
| /* Setup subprocess env for certain variables |
| */ |
| ap_hook_fixups(h2_h2_fixups, NULL,NULL, APR_HOOK_MIDDLE); |
| } |
| |
| static const char *val_HTTP2(apr_pool_t *p, server_rec *s, |
| conn_rec *c, request_rec *r, h2_conn_ctx_t *ctx) |
| { |
| return ctx? "on" : "off"; |
| } |
| |
| static const char *val_H2_PUSH(apr_pool_t *p, server_rec *s, |
| conn_rec *c, request_rec *r, |
| h2_conn_ctx_t *conn_ctx) |
| { |
| if (conn_ctx) { |
| if (r) { |
| if (conn_ctx->stream_id) { |
| const h2_stream *stream = h2_mplx_c2_stream_get(conn_ctx->mplx, conn_ctx->stream_id); |
| if (stream && stream->push_policy != H2_PUSH_NONE) { |
| return "on"; |
| } |
| } |
| } |
| else if (c && h2_session_push_enabled(conn_ctx->session)) { |
| return "on"; |
| } |
| } |
| else if (s) { |
| if (h2_config_geti(r, s, H2_CONF_PUSH)) { |
| return "on"; |
| } |
| } |
| return "off"; |
| } |
| |
| static const char *val_H2_PUSHED(apr_pool_t *p, server_rec *s, |
| conn_rec *c, request_rec *r, |
| h2_conn_ctx_t *conn_ctx) |
| { |
| if (conn_ctx) { |
| if (conn_ctx->stream_id && !H2_STREAM_CLIENT_INITIATED(conn_ctx->stream_id)) { |
| return "PUSHED"; |
| } |
| } |
| return ""; |
| } |
| |
| static const char *val_H2_PUSHED_ON(apr_pool_t *p, server_rec *s, |
| conn_rec *c, request_rec *r, |
| h2_conn_ctx_t *conn_ctx) |
| { |
| if (conn_ctx) { |
| if (conn_ctx->stream_id && !H2_STREAM_CLIENT_INITIATED(conn_ctx->stream_id)) { |
| const h2_stream *stream = h2_mplx_c2_stream_get(conn_ctx->mplx, conn_ctx->stream_id); |
| if (stream) { |
| return apr_itoa(p, stream->initiated_on); |
| } |
| } |
| } |
| return ""; |
| } |
| |
| static const char *val_H2_STREAM_TAG(apr_pool_t *p, server_rec *s, |
| conn_rec *c, request_rec *r, h2_conn_ctx_t *ctx) |
| { |
| if (c) { |
| h2_conn_ctx_t *conn_ctx = h2_conn_ctx_get(c); |
| if (conn_ctx) { |
| return conn_ctx->stream_id == 0? conn_ctx->id |
| : apr_psprintf(p, "%s-%d", conn_ctx->id, conn_ctx->stream_id); |
| } |
| } |
| return ""; |
| } |
| |
| static const char *val_H2_STREAM_ID(apr_pool_t *p, server_rec *s, |
| conn_rec *c, request_rec *r, h2_conn_ctx_t *ctx) |
| { |
| const char *cp = val_H2_STREAM_TAG(p, s, c, r, ctx); |
| if (cp && (cp = ap_strrchr_c(cp, '-'))) { |
| return ++cp; |
| } |
| return NULL; |
| } |
| |
| typedef const char *h2_var_lookup(apr_pool_t *p, server_rec *s, |
| conn_rec *c, request_rec *r, h2_conn_ctx_t *ctx); |
| typedef struct h2_var_def { |
| const char *name; |
| h2_var_lookup *lookup; |
| unsigned int subprocess : 1; /* should be set in r->subprocess_env */ |
| } h2_var_def; |
| |
| static h2_var_def H2_VARS[] = { |
| { "HTTP2", val_HTTP2, 1 }, |
| { "H2PUSH", val_H2_PUSH, 1 }, |
| { "H2_PUSH", val_H2_PUSH, 1 }, |
| { "H2_PUSHED", val_H2_PUSHED, 1 }, |
| { "H2_PUSHED_ON", val_H2_PUSHED_ON, 1 }, |
| { "H2_STREAM_ID", val_H2_STREAM_ID, 1 }, |
| { "H2_STREAM_TAG", val_H2_STREAM_TAG, 1 }, |
| }; |
| |
| #ifndef H2_ALEN |
| #define H2_ALEN(a) (sizeof(a)/sizeof((a)[0])) |
| #endif |
| |
| |
| static int http2_is_h2(conn_rec *c) |
| { |
| return h2_conn_ctx_get(c->master? c->master : c) != NULL; |
| } |
| |
| static char *http2_var_lookup(apr_pool_t *p, server_rec *s, |
| conn_rec *c, request_rec *r, char *name) |
| { |
| unsigned int i; |
| /* If the # of vars grow, we need to put definitions in a hash */ |
| for (i = 0; i < H2_ALEN(H2_VARS); ++i) { |
| h2_var_def *vdef = &H2_VARS[i]; |
| if (!strcmp(vdef->name, name)) { |
| h2_conn_ctx_t *ctx = (r? h2_conn_ctx_get(c) : |
| h2_conn_ctx_get(c->master? c->master : c)); |
| return (char *)vdef->lookup(p, s, c, r, ctx); |
| } |
| } |
| return (char*)""; |
| } |
| |
| static int h2_h2_fixups(request_rec *r) |
| { |
| if (r->connection->master) { |
| h2_conn_ctx_t *ctx = h2_conn_ctx_get(r->connection); |
| unsigned int i; |
| |
| for (i = 0; ctx && i < H2_ALEN(H2_VARS); ++i) { |
| h2_var_def *vdef = &H2_VARS[i]; |
| if (vdef->subprocess) { |
| apr_table_setn(r->subprocess_env, vdef->name, |
| vdef->lookup(r->pool, r->server, r->connection, |
| r, ctx)); |
| } |
| } |
| } |
| return DECLINED; |
| } |
