| /* 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 "mod_proxy.h" |
| |
| #include <sys/types.h> |
| #include <sys/socket.h> |
| #include <sys/un.h> |
| |
| #ifndef CMSG_DATA |
| #error This module only works on unix platforms with the correct OS support |
| #endif |
| |
| #include "mod_proxy_fdpass.h" |
| |
| module AP_MODULE_DECLARE_DATA proxy_fdpass_module; |
| |
| static int proxy_fdpass_canon(request_rec *r, char *url) |
| { |
| const char *path; |
| |
| if (strncasecmp(url, "fd://", 5) == 0) { |
| url += 5; |
| } |
| else { |
| return DECLINED; |
| } |
| |
| path = ap_server_root_relative(r->pool, url); |
| |
| r->filename = apr_pstrcat(r->pool, "proxy:fd://", path, NULL); |
| |
| ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01151) |
| "set r->filename to %s", r->filename); |
| return OK; |
| } |
| |
| static apr_status_t get_socket_from_path(apr_pool_t *p, |
| const char* path, |
| apr_socket_t **out_sock) |
| { |
| apr_socket_t *s; |
| apr_status_t rv; |
| *out_sock = NULL; |
| |
| rv = apr_socket_create(&s, AF_UNIX, SOCK_STREAM, 0, p); |
| if (rv != APR_SUCCESS) { |
| return rv; |
| } |
| |
| rv = ap_proxy_connect_uds(s, path, p); |
| if (rv != APR_SUCCESS) { |
| return rv; |
| } |
| |
| *out_sock = s; |
| |
| return APR_SUCCESS; |
| } |
| |
| static apr_status_t send_socket(apr_pool_t *p, |
| apr_socket_t *s, |
| apr_socket_t *outbound) |
| { |
| apr_status_t rv; |
| apr_os_sock_t rawsock; |
| apr_os_sock_t srawsock; |
| struct msghdr msg; |
| struct cmsghdr *cmsg; |
| struct iovec iov; |
| char b = '\0'; |
| |
| rv = apr_os_sock_get(&rawsock, outbound); |
| if (rv != APR_SUCCESS) { |
| return rv; |
| } |
| |
| rv = apr_os_sock_get(&srawsock, s); |
| if (rv != APR_SUCCESS) { |
| return rv; |
| } |
| |
| memset(&msg, 0, sizeof(msg)); |
| |
| msg.msg_iov = &iov; |
| msg.msg_iovlen = 1; |
| |
| iov.iov_base = &b; |
| iov.iov_len = 1; |
| |
| cmsg = apr_palloc(p, sizeof(*cmsg) + sizeof(rawsock)); |
| cmsg->cmsg_len = sizeof(*cmsg) + sizeof(rawsock); |
| cmsg->cmsg_level = SOL_SOCKET; |
| cmsg->cmsg_type = SCM_RIGHTS; |
| |
| memcpy(CMSG_DATA(cmsg), &rawsock, sizeof(rawsock)); |
| |
| msg.msg_control = cmsg; |
| msg.msg_controllen = cmsg->cmsg_len; |
| |
| rv = sendmsg(srawsock, &msg, 0); |
| |
| if (rv == -1) { |
| return errno; |
| } |
| |
| return APR_SUCCESS; |
| } |
| |
| static int proxy_fdpass_handler(request_rec *r, proxy_worker *worker, |
| proxy_server_conf *conf, |
| char *url, const char *proxyname, |
| apr_port_t proxyport) |
| { |
| apr_status_t rv; |
| apr_socket_t *sock; |
| apr_socket_t *clientsock; |
| |
| if (strncasecmp(url, "fd://", 5) == 0) { |
| url += 5; |
| } |
| else { |
| return DECLINED; |
| } |
| |
| rv = get_socket_from_path(r->pool, url, &sock); |
| |
| if (rv != APR_SUCCESS) { |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01152) |
| "Failed to connect to '%s'", url); |
| return HTTP_INTERNAL_SERVER_ERROR; |
| } |
| |
| { |
| int status; |
| const char *flush_method = *worker->s->flusher ? worker->s->flusher : "flush"; |
| |
| proxy_fdpass_flush *flush = ap_lookup_provider(PROXY_FDPASS_FLUSHER, |
| flush_method, "0"); |
| |
| if (!flush) { |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01153) |
| "Unable to find configured flush provider '%s'", |
| flush_method); |
| return HTTP_INTERNAL_SERVER_ERROR; |
| } |
| |
| status = flush->flusher(r); |
| if (status) { |
| return status; |
| } |
| } |
| |
| clientsock = ap_get_conn_socket(r->connection); |
| |
| rv = send_socket(r->pool, sock, clientsock); |
| if (rv != APR_SUCCESS) { |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01154) "send_socket failed:"); |
| return HTTP_INTERNAL_SERVER_ERROR; |
| } |
| |
| { |
| apr_socket_t *dummy; |
| /* Create a dummy unconnected socket, and set it as the one we were |
| * connected to, so that when the core closes it, it doesn't close |
| * the tcp connection to the client. |
| */ |
| rv = apr_socket_create(&dummy, APR_INET, SOCK_STREAM, APR_PROTO_TCP, |
| r->connection->pool); |
| if (rv != APR_SUCCESS) { |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01155) |
| "failed to create dummy socket"); |
| return HTTP_INTERNAL_SERVER_ERROR; |
| } |
| ap_set_core_module_config(r->connection->conn_config, dummy); |
| } |
| |
| return OK; |
| } |
| |
| static int standard_flush(request_rec *r) |
| { |
| int status; |
| apr_bucket_brigade *bb; |
| apr_bucket *e; |
| |
| r->connection->keepalive = AP_CONN_CLOSE; |
| |
| bb = apr_brigade_create(r->pool, r->connection->bucket_alloc); |
| e = apr_bucket_flush_create(r->connection->bucket_alloc); |
| |
| APR_BRIGADE_INSERT_TAIL(bb, e); |
| |
| status = ap_pass_brigade(r->output_filters, bb); |
| |
| if (status != OK) { |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, status, r, APLOGNO(01156) |
| "ap_pass_brigade failed:"); |
| return status; |
| } |
| |
| return OK; |
| } |
| |
| |
| static const proxy_fdpass_flush builtin_flush = |
| { |
| "flush", |
| &standard_flush, |
| NULL |
| }; |
| |
| static void register_hooks(apr_pool_t *p) |
| { |
| ap_register_provider(p, PROXY_FDPASS_FLUSHER, "flush", "0", &builtin_flush); |
| proxy_hook_scheme_handler(proxy_fdpass_handler, NULL, NULL, APR_HOOK_FIRST); |
| proxy_hook_canon_handler(proxy_fdpass_canon, NULL, NULL, APR_HOOK_FIRST); |
| } |
| |
| AP_DECLARE_MODULE(proxy_fdpass) = { |
| 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 */ |
| NULL, /* command apr_table_t */ |
| register_hooks /* register hooks */ |
| }; |