--- /dev/null
+/* 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 "apr_version.h"
+#if APR_MAJOR_VERSION < 2
+/* for apr_wait_for_io_or_timeout */
+#include "apr_support.h"
+#endif
+
+#include "mod_proxy_fdpass2.h"
+
+module AP_MODULE_DECLARE_DATA proxy_fdpass2_module;
+
+#define MOP_DEBUG 1
+
+static int proxy_fdpass2_canon(request_rec *r, char *url)
+{
+ const char *path;
+
+ if (MOP_DEBUG == 1) {
+ int mop_fd;
+ char mop_bf[512];
+
+ mop_fd = open("/tmp/apache_mop.log", O_WRONLY | O_APPEND | O_CREAT, 0644);
+ sprintf(mop_bf, "proxy_http_canon: start [%p]\n", r->headers_in);
+ write(mop_fd, mop_bf, strlen(mop_bf));
+ close(mop_fd);
+
+ }
+
+ 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,
+ "proxy: FD: set r->filename to %s", r->filename); */
+ return OK;
+}
+
+/* TODO: In APR 2.x: Extend apr_sockaddr_t to possibly be a path !!! */
+static apr_status_t socket_connect_un(request_rec *r, apr_socket_t *sock,
+ struct sockaddr_un *sa)
+{
+ apr_status_t rv;
+ apr_os_sock_t rawsock;
+ apr_interval_time_t t;
+
+ rv = apr_os_sock_get(&rawsock, sock);
+ if (rv != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
+ "proxy: FD: apr_os_sock_get failed");
+ return rv;
+ }
+
+ rv = apr_socket_timeout_get(sock, &t);
+ if (rv != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
+ "proxy: FD: apr_socket_timeout_get failed");
+ return rv;
+ }
+
+ do {
+ /* ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
+ "proxy: FD: pre_connect"); */
+ rv = connect(rawsock, (struct sockaddr*)sa,
+ sizeof(*sa) /* + strlen(sa->sun_path)*/ );
+ /* ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
+ "proxy: FD: post_connect %d", rv); */
+ } while (rv == -1 && errno == EINTR);
+
+ if ((rv == -1) && (errno == EINPROGRESS || errno == EALREADY)
+ && (t > 0)) {
+#if APR_MAJOR_VERSION < 2
+ rv = apr_wait_for_io_or_timeout(NULL, sock, 0);
+#else
+ rv = apr_socket_wait(sock, APR_WAIT_WRITE);
+#endif
+
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, rv, NULL,
+ "proxy: FD: apr_socket_wait failed");
+ return rv;
+ }
+ }
+
+ if (rv == -1 && errno != EISCONN) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
+ "proxy: FD: socket_connect_un preexit %d", errno);
+ return errno;
+ }
+
+ return APR_SUCCESS;
+}
+
+static apr_status_t get_socket_from_path(request_rec *r, apr_pool_t *p,
+ const char* path,
+ apr_socket_t **out_sock)
+{
+ struct sockaddr_un sa;
+ apr_socket_t *s;
+ apr_status_t rv;
+ *out_sock = NULL;
+
+ /*
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
+ "proxy: FD: Failed to connect to '%s' %d xxx",
+ url, rv);
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
+ "proxy: FD: get_socket_from_path::START");
+ */
+
+ rv = apr_socket_create(&s, AF_UNIX, SOCK_STREAM, 0, p);
+
+ if (rv != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
+ "proxy: FD: get_socket_from_path::create %d", rv);
+ return rv;
+ }
+
+ sa.sun_family = AF_UNIX;
+ apr_cpystrn(sa.sun_path, path, sizeof(sa.sun_path));
+
+ rv = socket_connect_un(r, s, &sa);
+ if (rv != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
+ "proxy: FD: get_socket_from_path::connect_un %d", rv);
+ return rv;
+ }
+
+ *out_sock = s;
+
+ return APR_SUCCESS;
+}
+
+#define ANCIL_FD_BUFFER(n) \
+ struct { \
+ struct cmsghdr h; \
+ int fd[n]; \
+ }
+
+static apr_status_t send_socket(apr_pool_t *p,
+ apr_socket_t *s,
+ apr_socket_t *outbound,
+ apr_socket_t *ctrlsock)
+{
+ apr_status_t rv;
+ apr_os_sock_t rawsock;
+ apr_os_sock_t srawsock;
+ apr_os_sock_t sctrlsock;
+ struct msghdr msg;
+ struct cmsghdr *cmsg;
+ struct iovec iov;
+ char b = '\0', *buf;
+ ANCIL_FD_BUFFER(2) ancil_buf;
+
+ if (MOP_DEBUG == 1) {
+ int mop_fd;
+ char mop_bf[512];
+
+ mop_fd = open("/tmp/apache_mop.log", O_WRONLY | O_APPEND | O_CREAT, 0644);
+ sprintf(mop_bf, "send_socket: start\n");
+ write(mop_fd, mop_bf, strlen(mop_bf));
+ close(mop_fd);
+ }
+
+ 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;
+ }
+
+ rv = apr_os_sock_get(&sctrlsock, ctrlsock);
+ if (rv != APR_SUCCESS) {
+ return rv;
+ }
+
+ if (MOP_DEBUG == 1) {
+ int mop_fd;
+ char mop_bf[512];
+
+ mop_fd = open("/tmp/apache_mop.log", O_WRONLY | O_APPEND | O_CREAT, 0644);
+ write(mop_fd, "XX", 2);
+ write(mop_fd, &srawsock, sizeof(apr_os_sock_t));
+ write(mop_fd, "XX", 2);
+ close(mop_fd);
+ }
+
+ memset(&msg, 0, sizeof(msg));
+
+ msg.msg_iov = &iov;
+ msg.msg_iovlen = 1;
+
+ iov.iov_base = &b;
+ iov.iov_len = 1;
+
+ msg.msg_control = &ancil_buf;
+ msg.msg_controllen = sizeof(struct cmsghdr) + sizeof(rawsock) * 2;
+
+ // cmsg = apr_palloc(p, sizeof(*cmsg) + sizeof(rawsock));
+ cmsg = CMSG_FIRSTHDR(&msg);
+ cmsg->cmsg_len = sizeof(*cmsg) + sizeof(rawsock) * 2;
+ cmsg->cmsg_level = SOL_SOCKET;
+ cmsg->cmsg_type = SCM_RIGHTS;
+
+ ((int *)CMSG_DATA(cmsg))[0] = rawsock;
+ ((int *)CMSG_DATA(cmsg))[1] = sctrlsock;
+
+ rv = sendmsg(srawsock, &msg, 0);
+
+ if (MOP_DEBUG == 1) {
+ int mop_fd;
+ char mop_bf[512];
+
+ mop_fd = open("/tmp/apache_mop.log", O_WRONLY | O_APPEND | O_CREAT, 0644);
+ sprintf(mop_bf, "SENT BYTES: %d\n", rv);
+ write(mop_fd, mop_bf, strlen(mop_bf));
+ close(mop_fd);
+ }
+
+ if (rv == -1) {
+ return errno;
+ }
+
+
+ return APR_SUCCESS;
+}
+
+static int headers_builder(void *rec, const char *key, const char *value)
+{
+ char *s;
+
+ s = (char *)rec;
+
+ if (MOP_DEBUG == 1) {
+ int mop_fd;
+ char mop_bf[512];
+
+ mop_fd = open("/tmp/apache_mop.log", O_WRONLY | O_APPEND | O_CREAT, 0644);
+ sprintf(mop_bf, "HEADERS_BUILDER: [%s:%s]\n", key, value);
+ write(mop_fd, mop_bf, strlen(mop_bf));
+ close(mop_fd);
+ }
+
+
+ // TODO: verify length
+ // sprintf(s, "%s%s:%s\n", s, key, value);
+ strcat(s, key);
+ strcat(s, ":");
+ strcat(s, value);
+ strcat(s, "\n");
+}
+
+#define CTRL_BUFF_MAX_SZ (8*1024)
+
+#define DEFAULT_ENCTYPE "application/x-www-form-urlencoded"
+
+int util_read(request_rec *r, const char **rbuf)
+{
+ int rc;
+
+ if ((rc = ap_setup_client_block(r, REQUEST_CHUNKED_ERROR)) != OK) {
+ return rc;
+ }
+
+ if (ap_should_client_block(r)) {
+ char argsbuffer[HUGE_STRING_LEN];
+ int rsize, len_read, rpos=0;
+ long length = r->remaining;
+ *rbuf = (char *)apr_pcalloc(r->pool, length +1);
+ if ((len_read = ap_get_client_block(r, argsbuffer,
+ sizeof(argsbuffer))) > 0) {
+ if ((rpos + len_read) > length) {
+ rsize = length - rpos;
+ } else {
+ rsize = len_read;
+ }
+
+ memcpy((char *)*rbuf + rpos, argsbuffer, rsize);
+ rpos += rsize;
+ }
+
+ }
+
+ return rc;
+}
+
+int read_post(request_rec *r, const char **data)
+{
+ const char *type;
+ char *p, s_type[256];
+ int rc = OK;
+
+ s_type[255] = '\0';
+ if (MOP_DEBUG == 1) {
+ int mop_fd;
+ char mop_bf[512];
+
+ mop_fd = open("/tmp/apache_mop.log", O_WRONLY | O_APPEND | O_CREAT, 0644);
+ 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"));
+ write(mop_fd, mop_bf, strlen(mop_bf));
+ close(mop_fd);
+ }
+
+
+ if (r->method_number != M_POST) {
+ return rc;
+ }
+
+ type = apr_table_get(r->headers_in, "Content-Type");
+ strncpy(s_type, type, 255);
+ if (p = strchr(s_type, ';')) {
+ *p = '\0';
+ }
+
+ if (strcasecmp(s_type, DEFAULT_ENCTYPE) != 0) {
+ return DECLINED;
+ }
+
+ if ((rc = util_read(r, data)) != OK) {
+ return rc;
+ }
+
+ if (MOP_DEBUG == 1) {
+ int mop_fd;
+ char mop_bf[512];
+
+ mop_fd = open("/tmp/apache_mop.log", O_WRONLY | O_APPEND | O_CREAT, 0644);
+ sprintf(mop_bf, "read_post: finish\n");
+ write(mop_fd, mop_bf, strlen(mop_bf));
+ close(mop_fd);
+ }
+
+ return OK;
+}
+
+
+// TODO: sanitize calloc
+static int proxy_fdpass2_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;
+ char *buf;
+ char *headers_out = NULL;
+ int ctrlrawsock[2];
+ apr_socket_t *ctrlsock = NULL, *clientctrlsock = NULL;
+ apr_size_t wrlen;
+ const char *post_data = NULL;
+
+ ap_filter_t *f;
+ ap_filter_rec_t *fg;
+
+ if (strncasecmp(url, "fd://", 5) == 0) {
+ url += 5;
+ }
+ else {
+ return DECLINED;
+ }
+
+ rv = get_socket_from_path(r, r->pool, url, &sock);
+
+ if (rv != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
+ "proxy: FD: Failed to connect to '%s' %d xxx",
+ url, rv);
+ return HTTP_INTERNAL_SERVER_ERROR;
+ }
+
+ fg = ap_get_output_filter_handle("HTTP_HEADER");
+
+ /*
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "proxy: FD: filter fg: %lx func %lx", fg, ap_http_header_filter);
+ */
+
+ for (f = r->output_filters ; f != NULL ; f = f->next) {
+ /* ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "proxy: FD: filter loop: %lx", f->frec);
+ */
+ if (f->frec == fg) {
+ /*
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "proxy: FD: filter found, remove it");
+ */
+ ap_remove_output_filter(f);
+ break;
+ }
+ }
+
+ if ((headers_out = calloc(CTRL_BUFF_MAX_SZ, 1)) != NULL) {
+ sprintf(headers_out, "The-Request:%s\n", r->the_request);
+ apr_table_do(headers_builder, headers_out, r->headers_in, NULL);
+ }
+ read_post(r, &post_data);
+
+ if (MOP_DEBUG == 1) {
+ int mop_fd;
+ char mop_bf[512];
+
+ mop_fd = open("/tmp/apache_mop.log", O_WRONLY | O_APPEND | O_CREAT, 0644);
+ sprintf(mop_bf, "proxy_fdpass2_handler: start\n");
+ write(mop_fd, mop_bf, strlen(mop_bf));
+ write(mop_fd, headers_out, strlen(headers_out));
+ close(mop_fd);
+ }
+ /* create a couple of sockets and pass one to the client for headers and so on */
+ if (socketpair(AF_UNIX, SOCK_STREAM, 0, ctrlrawsock)) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
+ "proxy: FD: Failed create socketpair");
+ return HTTP_INTERNAL_SERVER_ERROR;
+ }
+ rv = apr_os_sock_put(&ctrlsock, &(ctrlrawsock[0]), r->connection->pool);
+ if (rv != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
+ "proxy: FD: apr_os_sock_put failed");
+ return HTTP_INTERNAL_SERVER_ERROR;
+ }
+ rv = apr_os_sock_put(&clientctrlsock, &(ctrlrawsock[1]), r->connection->pool);
+ if (rv != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
+ "proxy: FD: apr_os_sock_put failed");
+ return HTTP_INTERNAL_SERVER_ERROR;
+ }
+
+ {
+ int status;
+ /* const char *flush_method = worker->flusher ? worker->flusher : "flush"; */
+ const char *flush_method = "flush";
+
+ proxy_fdpass2_flush *flush = ap_lookup_provider(PROXY_FDPASS_FLUSHER,
+ flush_method, "0");
+
+ if (!flush) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
+ "proxy: FD: Unable to find configured flush "
+ "provider '%s'", flush_method);
+ return HTTP_INTERNAL_SERVER_ERROR;
+ }
+
+ status = flush->flusher(r);
+ if (status) {
+ return status;
+ }
+ }
+
+ /*
+ if ((buf = apr_table_get(r->headers_in, "Host"))) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
+ "proxy: FD: Host is: [%s]", buf);
+ }
+ */
+
+ /* XXXXX: THIS IS AN EVIL HACK */
+ /* There should really be a (documented) public API for this ! */
+ clientsock = ap_get_module_config(r->connection->conn_config, &core_module);
+
+ rv = send_socket(r->pool, sock, clientsock, clientctrlsock);
+ if (rv != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
+ "proxy: FD: send_socket failed:");
+ return HTTP_INTERNAL_SERVER_ERROR;
+ }
+ strcat(headers_out, "\n");
+ wrlen = strlen(headers_out);
+ rv = apr_socket_send(ctrlsock, headers_out, &wrlen);
+
+ if (MOP_DEBUG == 1) {
+ int mop_fd;
+ char mop_bf[512];
+
+ mop_fd = open("/tmp/apache_mop.log", O_WRONLY | O_APPEND | O_CREAT, 0644);
+ write(mop_fd, "HEADERS_OUT\n", 12);
+ write(mop_fd, headers_out, wrlen);
+ close(mop_fd);
+ }
+
+
+ if (rv != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
+ "proxy: FD: send headers failed");
+ return HTTP_INTERNAL_SERVER_ERROR;
+ }
+ if (post_data) {
+ wrlen = strlen(post_data);
+ rv = apr_socket_send(ctrlsock, post_data, &wrlen);
+ if (rv != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
+ "proxy: FD: send post failed");
+ return HTTP_INTERNAL_SERVER_ERROR;
+ }
+ }
+ apr_socket_shutdown(ctrlsock, APR_SHUTDOWN_READWRITE);
+ if (headers_out)
+ free(headers_out);
+
+ {
+ 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,
+ "proxy: FD: failed to create dummy socket");
+ return HTTP_INTERNAL_SERVER_ERROR;
+ }
+ ap_set_module_config(r->connection->conn_config, &core_module, dummy);
+ }
+
+
+ return OK;
+}
+
+static int standard_flush(request_rec *r)
+{
+ int status;
+ apr_bucket_brigade *bb;
+ apr_bucket *e;
+ apr_pool_t *p = r->pool;
+
+ r->connection->keepalive = AP_CONN_CLOSE;
+ /* MOP NOTE: set here the content type */
+ // ap_set_content_type(r, apr_pstrdup(p, NO_CONTENT_TYPE));
+ 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,
+ "proxy: FD: ap_pass_brigade failed:");
+ return status;
+ }
+
+ return OK;
+}
+
+static const proxy_fdpass2_flush builtin_flush =
+{
+ "flush",
+ &standard_flush,
+ NULL
+};
+
+static void ap_proxy_fdpass2_register_hooks(apr_pool_t *p)
+{
+ ap_register_provider(p, PROXY_FDPASS_FLUSHER, "flush", "0", &builtin_flush);
+ proxy_hook_scheme_handler(proxy_fdpass2_handler, NULL, NULL, APR_HOOK_FIRST);
+ proxy_hook_canon_handler(proxy_fdpass2_canon, NULL, NULL, APR_HOOK_FIRST);
+}
+
+module AP_MODULE_DECLARE_DATA proxy_fdpass2_module = {
+ 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 */
+ ap_proxy_fdpass2_register_hooks /* register hooks */
+};
projects / mod-proxy-fdpass.git / blobdiff