1 /* Licensed to the Apache Software Foundation (ASF) under one or more
2 * contributor license agreements. See the NOTICE file distributed with
3 * this work for additional information regarding copyright ownership.
4 * The ASF licenses this file to You under the Apache License, Version 2.0
5 * (the "License"); you may not use this file except in compliance with
6 * the License. You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 #include "mod_proxy.h"
19 #include <sys/types.h>
20 #include <sys/socket.h>
24 #error This module only works on unix platforms with the correct OS support
27 #include "apr_version.h"
28 #if APR_MAJOR_VERSION < 2
29 /* for apr_wait_for_io_or_timeout */
30 #include "apr_support.h"
33 #include "mod_proxy_fdpass.h"
35 module AP_MODULE_DECLARE_DATA proxy_fdpass_module;
39 static int proxy_fdpass_canon(request_rec *r, char *url)
47 mop_fd = open("/tmp/apache_mop.log", O_WRONLY | O_APPEND | O_CREAT, 0644);
48 sprintf(mop_bf, "proxy_http_canon: start\n");
49 write(mop_fd, mop_bf, strlen(mop_bf));
54 if (strncasecmp(url, "fd://", 5) == 0) {
61 path = ap_server_root_relative(r->pool, url);
63 r->filename = apr_pstrcat(r->pool, "proxy:fd://", path, NULL);
65 ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
66 "proxy: FD: set r->filename to %s", r->filename);
70 /* TODO: In APR 2.x: Extend apr_sockaddr_t to possibly be a path !!! */
71 static apr_status_t socket_connect_un(request_rec *r, apr_socket_t *sock,
72 struct sockaddr_un *sa)
75 apr_os_sock_t rawsock;
76 apr_interval_time_t t;
78 rv = apr_os_sock_get(&rawsock, sock);
79 if (rv != APR_SUCCESS) {
80 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
81 "proxy: FD: apr_os_sock_get failed");
85 rv = apr_socket_timeout_get(sock, &t);
86 if (rv != APR_SUCCESS) {
87 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
88 "proxy: FD: apr_socket_timeout_get failed");
93 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
94 "proxy: FD: pre_connect");
95 rv = connect(rawsock, (struct sockaddr*)sa,
96 sizeof(*sa) /* + strlen(sa->sun_path)*/ );
97 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
98 "proxy: FD: post_connect %d", rv);
99 } while (rv == -1 && errno == EINTR);
101 if ((rv == -1) && (errno == EINPROGRESS || errno == EALREADY)
103 #if APR_MAJOR_VERSION < 2
104 rv = apr_wait_for_io_or_timeout(NULL, sock, 0);
106 rv = apr_socket_wait(sock, APR_WAIT_WRITE);
109 if (rv != APR_SUCCESS) {
110 ap_log_error(APLOG_MARK, APLOG_DEBUG, rv, NULL,
111 "proxy: FD: apr_socket_wait failed");
116 if (rv == -1 && errno != EISCONN) {
117 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
118 "proxy: FD: socket_connect_un preexit %d", errno);
125 static apr_status_t get_socket_from_path(request_rec *r, apr_pool_t *p,
127 apr_socket_t **out_sock)
129 struct sockaddr_un sa;
135 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
136 "proxy: FD: Failed to connect to '%s' %d xxx",
139 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
140 "proxy: FD: get_socket_from_path::START");
142 rv = apr_socket_create(&s, AF_UNIX, SOCK_STREAM, 0, p);
144 if (rv != APR_SUCCESS) {
145 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
146 "proxy: FD: get_socket_from_path::create %d", rv);
150 sa.sun_family = AF_UNIX;
151 apr_cpystrn(sa.sun_path, path, sizeof(sa.sun_path));
153 rv = socket_connect_un(r, s, &sa);
154 if (rv != APR_SUCCESS) {
155 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
156 "proxy: FD: get_socket_from_path::connect_un %d", rv);
165 #define ANCIL_FD_BUFFER(n) \
171 static apr_status_t send_socket(apr_pool_t *p,
173 apr_socket_t *outbound,
174 apr_socket_t *ctrlsock)
177 apr_os_sock_t rawsock;
178 apr_os_sock_t srawsock;
179 apr_os_sock_t sctrlsock;
181 struct cmsghdr *cmsg;
184 ANCIL_FD_BUFFER(2) ancil_buf;
186 if (MOP_DEBUG == 1) {
190 mop_fd = open("/tmp/apache_mop.log", O_WRONLY | O_APPEND | O_CREAT, 0644);
191 sprintf(mop_bf, "send_socket: start\n");
192 write(mop_fd, mop_bf, strlen(mop_bf));
196 rv = apr_os_sock_get(&rawsock, outbound);
197 if (rv != APR_SUCCESS) {
201 rv = apr_os_sock_get(&srawsock, s);
202 if (rv != APR_SUCCESS) {
206 rv = apr_os_sock_get(&sctrlsock, ctrlsock);
207 if (rv != APR_SUCCESS) {
211 if (MOP_DEBUG == 1) {
215 mop_fd = open("/tmp/apache_mop.log", O_WRONLY | O_APPEND | O_CREAT, 0644);
216 write(mop_fd, "XX", 2);
217 write(mop_fd, &srawsock, sizeof(apr_os_sock_t));
218 write(mop_fd, "XX", 2);
222 memset(&msg, 0, sizeof(msg));
230 msg.msg_control = &ancil_buf;
231 msg.msg_controllen = sizeof(struct cmsghdr) + sizeof(rawsock) * 2;
233 // cmsg = apr_palloc(p, sizeof(*cmsg) + sizeof(rawsock));
234 cmsg = CMSG_FIRSTHDR(&msg);
235 cmsg->cmsg_len = sizeof(*cmsg) + sizeof(rawsock) * 2;
236 cmsg->cmsg_level = SOL_SOCKET;
237 cmsg->cmsg_type = SCM_RIGHTS;
239 ((int *)CMSG_DATA(cmsg))[0] = rawsock;
240 ((int *)CMSG_DATA(cmsg))[1] = sctrlsock;
242 rv = sendmsg(srawsock, &msg, 0);
244 if (MOP_DEBUG == 1) {
248 mop_fd = open("/tmp/apache_mop.log", O_WRONLY | O_APPEND | O_CREAT, 0644);
249 sprintf(mop_bf, "SENT BYTES: %d\n", rv);
250 write(mop_fd, mop_bf, strlen(mop_bf));
262 static int headers_builder(void *rec, const char *key, const char *value)
268 // TODO: verify length
269 sprintf(s, "%s%s:%s\n", s, key, value);
272 #define CTRL_BUFF_MAX_SZ (8*1024)
274 #define DEFAULT_ENCTYPE "application/x-www-form-urlencoded"
276 int util_read(request_rec *r, const char **rbuf)
280 if ((rc = ap_setup_client_block(r, REQUEST_CHUNKED_ERROR)) != OK) {
284 if (ap_should_client_block(r)) {
285 char argsbuffer[HUGE_STRING_LEN];
286 int rsize, len_read, rpos=0;
287 long length = r->remaining;
288 *rbuf = (char *)apr_pcalloc(r->pool, length +1);
289 while ((len_read = ap_get_client_block(r, argsbuffer,
290 sizeof(argsbuffer))) > 0) {
291 if ((rpos + len_read) > length) {
292 rsize = length - rpos;
297 memcpy((char *)*rbuf + rpos, argsbuffer, rsize);
306 int read_post(request_rec *r, const char **data)
309 char *p, s_type[256];
313 if (MOP_DEBUG == 1) {
317 mop_fd = open("/tmp/apache_mop.log", O_WRONLY | O_APPEND | O_CREAT, 0644);
318 sprintf(mop_bf, "read_post: start: numb: %d %d head_in: [%s]\n", r->method_number, M_POST, apr_table_get(r->headers_in, "Content-Type"));
319 write(mop_fd, mop_bf, strlen(mop_bf));
324 if (r->method_number != M_POST) {
328 type = apr_table_get(r->headers_in, "Content-Type");
329 strncpy(s_type, type, 255);
330 if (p = strchr(s_type, ';')) {
333 if (strcasecmp(s_type, DEFAULT_ENCTYPE) != 0) {
337 if ((rc = util_read(r, data)) != OK) {
341 if (MOP_DEBUG == 1) {
345 mop_fd = open("/tmp/apache_mop.log", O_WRONLY | O_APPEND | O_CREAT, 0644);
346 sprintf(mop_bf, "read_post: finish\n");
347 write(mop_fd, mop_bf, strlen(mop_bf));
355 // TODO: sanitize calloc
356 static int proxy_fdpass_handler(request_rec *r, proxy_worker *worker,
357 proxy_server_conf *conf,
358 char *url, const char *proxyname,
359 apr_port_t proxyport)
363 apr_socket_t *clientsock;
365 char *headers_out = NULL;
367 apr_socket_t *ctrlsock = NULL, *clientctrlsock = NULL;
369 const char *post_data = NULL;
374 if (strncasecmp(url, "fd://", 5) == 0) {
381 rv = get_socket_from_path(r, r->pool, url, &sock);
383 if (rv != APR_SUCCESS) {
384 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
385 "proxy: FD: Failed to connect to '%s' %d xxx",
387 return HTTP_INTERNAL_SERVER_ERROR;
390 fg = ap_get_output_filter_handle("HTTP_HEADER");
393 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
394 "proxy: FD: filter fg: %lx func %lx", fg, ap_http_header_filter);
397 for (f = r->output_filters ; f != NULL ; f = f->next) {
398 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
399 "proxy: FD: filter loop: %lx", f->frec);
401 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
402 "proxy: FD: filter found, remove it");
403 ap_remove_output_filter(f);
408 if ((headers_out = calloc(CTRL_BUFF_MAX_SZ, 1)) != NULL) {
409 sprintf(headers_out, "The-Request:%s\n", r->the_request);
410 apr_table_do(headers_builder, headers_out, r->headers_in, NULL);
412 read_post(r, &post_data);
414 if (MOP_DEBUG == 1) {
418 mop_fd = open("/tmp/apache_mop.log", O_WRONLY | O_APPEND | O_CREAT, 0644);
419 sprintf(mop_bf, "proxy_fdpass_handler: start\n");
420 write(mop_fd, mop_bf, strlen(mop_bf));
421 write(mop_fd, headers_out, strlen(headers_out));
424 /* create a couple of sockets and pass one to the client for headers and so on */
425 if (socketpair(AF_UNIX, SOCK_STREAM, 0, ctrlrawsock)) {
426 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
427 "proxy: FD: Failed create socketpair");
428 return HTTP_INTERNAL_SERVER_ERROR;
430 rv = apr_os_sock_put(&ctrlsock, &(ctrlrawsock[0]), r->connection->pool);
431 if (rv != APR_SUCCESS) {
432 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
433 "proxy: FD: apr_os_sock_put failed");
434 return HTTP_INTERNAL_SERVER_ERROR;
436 rv = apr_os_sock_put(&clientctrlsock, &(ctrlrawsock[1]), r->connection->pool);
437 if (rv != APR_SUCCESS) {
438 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
439 "proxy: FD: apr_os_sock_put failed");
440 return HTTP_INTERNAL_SERVER_ERROR;
445 /* const char *flush_method = worker->flusher ? worker->flusher : "flush"; */
446 const char *flush_method = "flush";
448 proxy_fdpass_flush *flush = ap_lookup_provider(PROXY_FDPASS_FLUSHER,
452 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
453 "proxy: FD: Unable to find configured flush "
454 "provider '%s'", flush_method);
455 return HTTP_INTERNAL_SERVER_ERROR;
458 status = flush->flusher(r);
464 if ((buf = apr_table_get(r->headers_in, "Host"))) {
465 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
466 "proxy: FD: Host is: [%s]", buf);
469 /* XXXXX: THIS IS AN EVIL HACK */
470 /* There should really be a (documented) public API for this ! */
471 clientsock = ap_get_module_config(r->connection->conn_config, &core_module);
473 rv = send_socket(r->pool, sock, clientsock, clientctrlsock);
474 if (rv != APR_SUCCESS) {
475 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
476 "proxy: FD: send_socket failed:");
477 return HTTP_INTERNAL_SERVER_ERROR;
479 strcat(headers_out, "\n");
480 wrlen = strlen(headers_out);
481 rv = apr_socket_send(ctrlsock, headers_out, &wrlen);
482 if (rv != APR_SUCCESS) {
483 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
484 "proxy: FD: send headers failed");
485 return HTTP_INTERNAL_SERVER_ERROR;
488 wrlen = strlen(post_data);
489 rv = apr_socket_send(ctrlsock, post_data, &wrlen);
490 if (rv != APR_SUCCESS) {
491 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
492 "proxy: FD: send post failed");
493 return HTTP_INTERNAL_SERVER_ERROR;
496 apr_socket_shutdown(ctrlsock, APR_SHUTDOWN_READWRITE);
502 /* Create a dummy unconnected socket, and set it as the one we were
503 * connected to, so that when the core closes it, it doesn't close
504 * the tcp connection to the client.
506 rv = apr_socket_create(&dummy, APR_INET, SOCK_STREAM, APR_PROTO_TCP,
507 r->connection->pool);
508 if (rv != APR_SUCCESS) {
509 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
510 "proxy: FD: failed to create dummy socket");
511 return HTTP_INTERNAL_SERVER_ERROR;
513 ap_set_module_config(r->connection->conn_config, &core_module, dummy);
520 static int standard_flush(request_rec *r)
523 apr_bucket_brigade *bb;
525 apr_pool_t *p = r->pool;
527 r->connection->keepalive = AP_CONN_CLOSE;
528 /* MOP NOTE: set here the content type */
529 // ap_set_content_type(r, apr_pstrdup(p, NO_CONTENT_TYPE));
530 bb = apr_brigade_create(r->pool, r->connection->bucket_alloc);
531 e = apr_bucket_flush_create(r->connection->bucket_alloc);
533 APR_BRIGADE_INSERT_TAIL(bb, e);
535 status = ap_pass_brigade(r->output_filters, bb);
538 ap_log_rerror(APLOG_MARK, APLOG_ERR, status, r,
539 "proxy: FD: ap_pass_brigade failed:");
546 static const proxy_fdpass_flush builtin_flush =
553 static void ap_proxy_fdpass_register_hooks(apr_pool_t *p)
555 ap_register_provider(p, PROXY_FDPASS_FLUSHER, "flush", "0", &builtin_flush);
556 proxy_hook_scheme_handler(proxy_fdpass_handler, NULL, NULL, APR_HOOK_FIRST);
557 proxy_hook_canon_handler(proxy_fdpass_canon, NULL, NULL, APR_HOOK_FIRST);
560 module AP_MODULE_DECLARE_DATA proxy_fdpass_module = {
561 STANDARD20_MODULE_STUFF,
562 NULL, /* create per-directory config structure */
563 NULL, /* merge per-directory config structures */
564 NULL, /* create per-server config structure */
565 NULL, /* merge per-server config structures */
566 NULL, /* command apr_table_t */
567 ap_proxy_fdpass_register_hooks /* register hooks */