X-Git-Url: https://mop.ddnsfree.com/gitweb/?p=mod-proxy-fdpass.git;a=blobdiff_plain;f=mod_proxy_fdpass2.c;fp=mod_proxy_fdpass2.c;h=7d4c6aec5bb27b374ab0633ad8c599e0c6a9e717;hp=0000000000000000000000000000000000000000;hb=a10c60232480678fdc9ea2314df64e0655eb169b;hpb=34a20c86b2a1e8b901cdf1e8583e261dea69b80b

diff --git a/mod_proxy_fdpass2.c b/mod_proxy_fdpass2.c
new file mode 100644
index 0000000..7d4c6ae
--- /dev/null
+++ b/mod_proxy_fdpass2.c
@@ -0,0 +1,601 @@
+/* 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 */
+};