diff options
Diffstat (limited to 'modules/proxy/proxy_ftp.c')
| -rw-r--r-- | modules/proxy/proxy_ftp.c | 1666 |
1 files changed, 0 insertions, 1666 deletions
diff --git a/modules/proxy/proxy_ftp.c b/modules/proxy/proxy_ftp.c deleted file mode 100644 index a6661db7a9..0000000000 --- a/modules/proxy/proxy_ftp.c +++ /dev/null @@ -1,1666 +0,0 @@ -/* ==================================================================== - * The Apache Software License, Version 1.1 - * - * Copyright (c) 2000-2001 The Apache Software Foundation. All rights - * reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * - * 3. The end-user documentation included with the redistribution, - * if any, must include the following acknowledgment: - * "This product includes software developed by the - * Apache Software Foundation (http://www.apache.org/)." - * Alternately, this acknowledgment may appear in the software itself, - * if and wherever such third-party acknowledgments normally appear. - * - * 4. The names "Apache" and "Apache Software Foundation" must - * not be used to endorse or promote products derived from this - * software without prior written permission. For written - * permission, please contact apache@apache.org. - * - * 5. Products derived from this software may not be called "Apache", - * nor may "Apache" appear in their name, without prior written - * permission of the Apache Software Foundation. - * - * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED - * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES - * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE - * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR - * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF - * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND - * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, - * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT - * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * ==================================================================== - * - * This software consists of voluntary contributions made by many - * individuals on behalf of the Apache Software Foundation. For more - * information on the Apache Software Foundation, please see - * <http://www.apache.org/>. - * - * Portions of this software are based upon public domain software - * originally written at the National Center for Supercomputing Applications, - * University of Illinois, Urbana-Champaign. - */ - -/* FTP routines for Apache proxy */ - -#include "mod_proxy.h" - -#define AUTODETECT_PWD - -module AP_MODULE_DECLARE_DATA proxy_ftp_module; - -PROXY_DECLARE (int) ap_proxy_ftp_canon(request_rec *r, char *url); -PROXY_DECLARE (int) ap_proxy_ftp_handler(request_rec *r, proxy_server_conf *conf, - char *url, const char *proxyhost, - apr_port_t proxyport); -apr_status_t ap_proxy_send_dir_filter(ap_filter_t *f, - apr_bucket_brigade *bb); - - -/* - * Decodes a '%' escaped string, and returns the number of characters - */ -static int decodeenc(char *x) -{ - int i, j, ch; - - if (x[0] == '\0') - return 0; /* special case for no characters */ - for (i = 0, j = 0; x[i] != '\0'; i++, j++) { - /* decode it if not already done */ - ch = x[i]; - if (ch == '%' && ap_isxdigit(x[i + 1]) && ap_isxdigit(x[i + 2])) { - ch = ap_proxy_hex2c(&x[i + 1]); - i += 2; - } - x[j] = ch; - } - x[j] = '\0'; - return j; -} - -/* - * checks an encoded ftp string for bad characters, namely, CR, LF or - * non-ascii character - */ -static int ftp_check_string(const char *x) -{ - int i, ch = 0; - - for (i = 0; x[i] != '\0'; i++) { - ch = x[i]; - if (ch == '%' && ap_isxdigit(x[i + 1]) && ap_isxdigit(x[i + 2])) { - ch = ap_proxy_hex2c(&x[i + 1]); - i += 2; - } -#if !APR_CHARSET_EBCDIC - if (ch == '\015' || ch == '\012' || (ch & 0x80)) -#else /*APR_CHARSET_EBCDIC*/ - if (ch == '\r' || ch == '\n' || (os_toascii[ch] & 0x80)) -#endif /*APR_CHARSET_EBCDIC*/ - return 0; - } - return 1; -} - -/* - * Canonicalise ftp URLs. - */ -PROXY_DECLARE (int) ap_proxy_ftp_canon(request_rec *r, char *url) -{ - char *user, *password, *host, *path, *parms, *strp, sport[7]; - apr_pool_t *p = r->pool; - const char *err; - apr_port_t port, def_port; - - /* */ - if (strncasecmp(url, "ftp:", 4) == 0) { - url += 4; - } - else { - return DECLINED; - } - def_port = ap_default_port_for_scheme("ftp"); - - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: canonicalising URL %s", url); - - port = def_port; - err = ap_proxy_canon_netloc(p, &url, &user, &password, &host, &port); - if (err) - return HTTP_BAD_REQUEST; - if (user != NULL && !ftp_check_string(user)) - return HTTP_BAD_REQUEST; - if (password != NULL && !ftp_check_string(password)) - return HTTP_BAD_REQUEST; - - /* now parse path/parameters args, according to rfc1738 */ - /* N.B. if this isn't a true proxy request, then the URL path - * (but not query args) has already been decoded. - * This gives rise to the problem of a ; being decoded into the - * path. - */ - strp = strchr(url, ';'); - if (strp != NULL) { - *(strp++) = '\0'; - parms = ap_proxy_canonenc(p, strp, strlen(strp), enc_parm, - r->proxyreq); - if (parms == NULL) - return HTTP_BAD_REQUEST; - } - else - parms = ""; - - path = ap_proxy_canonenc(p, url, strlen(url), enc_path, r->proxyreq); - if (path == NULL) - return HTTP_BAD_REQUEST; - if (!ftp_check_string(path)) - return HTTP_BAD_REQUEST; - - if (r->proxyreq && r->args != NULL) { - if (strp != NULL) { - strp = ap_proxy_canonenc(p, r->args, strlen(r->args), enc_parm, 1); - if (strp == NULL) - return HTTP_BAD_REQUEST; - parms = apr_pstrcat(p, parms, "?", strp, NULL); - } - else { - strp = ap_proxy_canonenc(p, r->args, strlen(r->args), enc_fpath, 1); - if (strp == NULL) - return HTTP_BAD_REQUEST; - path = apr_pstrcat(p, path, "?", strp, NULL); - } - r->args = NULL; - } - -/* now, rebuild URL */ - - if (port != def_port) - apr_snprintf(sport, sizeof(sport), ":%d", port); - else - sport[0] = '\0'; - - r->filename = apr_pstrcat(p, "proxy:ftp://", (user != NULL) ? user : "", - (password != NULL) ? ":" : "", - (password != NULL) ? password : "", - (user != NULL) ? "@" : "", host, sport, "/", path, - (parms[0] != '\0') ? ";" : "", parms, NULL); - - return OK; -} - -/* we chop lines longer than 80 characters */ -#define MAX_LINE_LEN 80 - -/* - * Reads response lines, returns both the ftp status code and - * remembers the response message in the supplied buffer - */ -static int ftp_getrc_msg(conn_rec *c, apr_bucket_brigade *bb, char *msgbuf, int msglen) -{ - int status; - char response[MAX_LINE_LEN]; - char buff[5]; - char *mb = msgbuf, - *me = &msgbuf[msglen]; - apr_status_t rv; - int eos; - - if (APR_SUCCESS != (rv = ap_proxy_string_read(c, bb, response, sizeof(response), &eos))) { - return -1; - } - if (!apr_isdigit(response[0]) || !apr_isdigit(response[1]) || - !apr_isdigit(response[2]) || (response[3] != ' ' && response[3] != '-')) - status = 0; - else - status = 100 * response[0] + 10 * response[1] + response[2] - 111 * '0'; - - mb = apr_cpystrn(mb, response+4, me - mb); - - if (response[3] == '-') { - memcpy(buff, response, 3); - buff[3] = ' '; - do { - if (APR_SUCCESS != (rv = ap_proxy_string_read(c, bb, response, sizeof(response), &eos))) { - return -1; - } - mb = apr_cpystrn(mb, response + (' ' == response[0] ? 1 : 4), me - mb); - } while (memcmp(response, buff, 4) != 0); - } - - return status; -} - -/* this is a filter that turns a raw ASCII directory listing into pretty HTML */ - -/* ideally, mod_proxy should simply send the raw directory list up the filter - * stack to mod_autoindex, which in theory should turn the raw ascii into - * pretty html along with all the bells and whistles it provides... - * - * all in good time...! :) - */ - -typedef struct { - apr_bucket_brigade *in; - char buffer[MAX_STRING_LEN]; - enum {HEADER, BODY, FOOTER} state; -} proxy_dir_ctx_t; - -apr_status_t ap_proxy_send_dir_filter(ap_filter_t *f, apr_bucket_brigade *in) -{ - request_rec *r = f->r; - apr_pool_t *p = r->pool; - apr_bucket *e; - apr_bucket_brigade *out = apr_brigade_create(p); - apr_status_t rv; - - register int n; - char *dir, *path, *reldir, *site, *str; - - const char *pwd = apr_table_get(r->notes, "Directory-PWD"); - const char *readme = apr_table_get(r->notes, "Directory-README"); - - proxy_dir_ctx_t *ctx = f->ctx; - if (!ctx) { - f->ctx = ctx = apr_pcalloc(p, sizeof(*ctx)); - ctx->in = apr_brigade_create(p); - ctx->buffer[0] = 0; - ctx->state = HEADER; - } - - /* combine the stored and the new */ - APR_BRIGADE_CONCAT(ctx->in, in); - - if (HEADER == ctx->state) { - - /* Save "scheme://site" prefix without password */ - site = ap_unparse_uri_components(p, &f->r->parsed_uri, UNP_OMITPASSWORD|UNP_OMITPATHINFO); - /* ... and path without query args */ - path = ap_unparse_uri_components(p, &f->r->parsed_uri, UNP_OMITSITEPART|UNP_OMITQUERY); - (void)decodeenc(path); - - /* Copy path, strip (all except the last) trailing slashes */ - path = dir = apr_pstrcat(p, path, "/", NULL); - while ((n = strlen(path)) > 1 && path[n-1] == '/' && path[n-2] == '/') - path[n-1] = '\0'; - - /* print "ftp://host/" */ - str = apr_psprintf(p, DOCTYPE_HTML_3_2 - "\n\n<HTML>\n<HEAD>\n<TITLE>%s%s</TITLE>\n" - "<BASE HREF=\"%s%s\">\n</HEAD>\n\n" - "<BODY>\n\n<H2>Directory of " - "<A HREF=\"/\">%s</A>/", - site, path, site, path, site); - - e = apr_bucket_pool_create(str, strlen(str), p); - APR_BRIGADE_INSERT_TAIL(out, e); - - while ((dir = strchr(dir+1, '/')) != NULL) - { - *dir = '\0'; - if ((reldir = strrchr(path+1, '/'))==NULL) - reldir = path+1; - else - ++reldir; - /* print "path/" component */ - str = apr_psprintf(p, "<A HREF=\"/%s/\">%s</A>/", path+1, reldir); - e = apr_bucket_pool_create(str, strlen(str), p); - APR_BRIGADE_INSERT_TAIL(out, e); - *dir = '/'; - } - /* If the caller has determined the current directory, and it differs */ - /* from what the client requested, then show the real name */ - if (pwd == NULL || strncmp (pwd, path, strlen(pwd)) == 0) { - str = apr_psprintf(p, "</H2>\n\n<HR></HR>\n\n<PRE>"); - } else { - str = apr_psprintf(p, "</H2>\n\n(%s)\n\n<HR></HR>\n\n<PRE>", pwd); - } - e = apr_bucket_pool_create(str, strlen(str), p); - APR_BRIGADE_INSERT_TAIL(out, e); - - /* print README */ - if (readme) { - str = apr_psprintf(p, "%s\n</PRE>\n\n<HR></HR>\n\n<PRE>\n", - readme); - - e = apr_bucket_pool_create(str, strlen(str), p); - APR_BRIGADE_INSERT_TAIL(out, e); - } - - /* make sure page intro gets sent out */ - e = apr_bucket_flush_create(); - APR_BRIGADE_INSERT_TAIL(out, e); - if (APR_SUCCESS != (rv = ap_pass_brigade(f->next, out))) { - return rv; - } - apr_brigade_cleanup(out); - - ctx->state = BODY; - } - - /* loop through each line of directory */ - while (BODY == ctx->state) { - char *filename; - int found = 0; - int eos = 0; - - /* get a complete line */ - /* if the buffer overruns - throw data away */ - while (!found && !APR_BRIGADE_EMPTY(ctx->in)) { - char *pos, *response; - apr_size_t len, max; - e = APR_BRIGADE_FIRST(ctx->in); - if (APR_BUCKET_IS_EOS(e)) { - eos = 1; - break; - } - if (APR_SUCCESS != (rv = apr_bucket_read(e, (const char **)&response, &len, APR_BLOCK_READ))) { - return rv; - } - pos = memchr(response, APR_ASCII_LF, len); - if (pos != NULL) { - if ((pos - response + 1) != len) { - len = pos - response + 1; - apr_bucket_split(e, pos - response + 1); - - } - found = 1; - } - max = sizeof(ctx->buffer)-strlen(ctx->buffer)-1; - if (len > max) { - len = max; - } -/* strncat works here, but apr_cpystrn does not - the last char gets chopped, dunno why */ -/* apr_cpystrn(ctx->buffer+strlen(ctx->buffer), response, len);*/ - strncat(ctx->buffer, response, len); - APR_BUCKET_REMOVE(e); - apr_bucket_destroy(e); - } - - /* EOS? jump to footer */ - if (eos) { - ctx->state = FOOTER; - break; - } - - /* not complete? leave and try get some more */ - if (!found) { - return APR_SUCCESS; - } - - /* a symlink? */ - if (ctx->buffer[0] == 'l' && (filename=strstr(ctx->buffer, " -> ")) != NULL) { - char *link_ptr = filename; - - do { - filename--; - } while (filename[0] != ' '); - *(filename++) = '\0'; - *(link_ptr++) = '\0'; - if ((n = strlen(link_ptr)) > 1 && link_ptr[n - 1] == '\n') - link_ptr[n - 1] = '\0'; - str = apr_psprintf(p, "%s <A HREF=\"%s\">%s %s</A>\n", ctx->buffer, filename, filename, link_ptr); - } - - /* a directory/file? */ - else if (ctx->buffer[0] == 'd' || ctx->buffer[0] == '-' || ctx->buffer[0] == 'l' || apr_isdigit(ctx->buffer[0])) { - int searchidx = 0; - char *searchptr = NULL; - int firstfile = 1; - if (apr_isdigit(ctx->buffer[0])) { /* handle DOS dir */ - searchptr = strchr(ctx->buffer, '<'); - if (searchptr != NULL) - *searchptr = '['; - searchptr = strchr(ctx->buffer, '>'); - if (searchptr != NULL) - *searchptr = ']'; - } - - filename = strrchr(ctx->buffer, ' '); - *(filename++) = 0; - filename[strlen(filename) - 1] = 0; - - /* handle filenames with spaces in 'em */ - if (!strcmp(filename, ".") || !strcmp(filename, "..") || firstfile) { - firstfile = 0; - searchidx = filename - ctx->buffer; - } - else if (searchidx != 0 && ctx->buffer[searchidx] != 0) { - *(--filename) = ' '; - ctx->buffer[searchidx - 1] = 0; - filename = &ctx->buffer[searchidx]; - } - - /* Special handling for '.' and '..' */ - if (!strcmp(filename, ".") || !strcmp(filename, "..") || ctx->buffer[0] == 'd') { - str = apr_psprintf(p, "%s <A HREF=\"%s/\">%s</A>\n", - ctx->buffer, filename, filename); - } - else { - str = apr_psprintf(p, "%s <A HREF=\"%s\">%s</A>\n", - ctx->buffer, filename, filename); - } - } - else { - str = apr_pstrdup(p, ctx->buffer); - } - - /* erase buffer for next time around */ - ctx->buffer[0] = 0; - - e = apr_bucket_pool_create(str, strlen(str), p); - APR_BRIGADE_INSERT_TAIL(out, e); - e = apr_bucket_flush_create(); - APR_BRIGADE_INSERT_TAIL(out, e); - if (APR_SUCCESS != (rv = ap_pass_brigade(f->next, out))) { - return rv; - } - apr_brigade_cleanup(out); - - } - - if (FOOTER == ctx->state) { - str = apr_psprintf(p, "</PRE>\n\n<HR></HR>\n\n%s\n\n</BODY>\n</HTML>\n", ap_psignature("", r)); - e = apr_bucket_pool_create(str, strlen(str), p); - APR_BRIGADE_INSERT_TAIL(out, e); - - e = apr_bucket_flush_create(); - APR_BRIGADE_INSERT_TAIL(out, e); - - e = apr_bucket_eos_create(); - APR_BRIGADE_INSERT_TAIL(out, e); - - if (APR_SUCCESS != (rv = ap_pass_brigade(f->next, out))) { - return rv; - } - apr_brigade_destroy(out); - } - - return APR_SUCCESS; -} - -/* Common routine for failed authorization (i.e., missing or wrong password) - * to an ftp service. This causes most browsers to retry the request - * with username and password (which was presumably queried from the user) - * supplied in the Authorization: header. - * Note that we "invent" a realm name which consists of the - * ftp://user@host part of the reqest (sans password -if supplied but invalid-) - */ -static int ftp_unauthorized (request_rec *r, int log_it) -{ - r->proxyreq = PROXYREQ_NONE; - /* Log failed requests if they supplied a password - * (log username/password guessing attempts) - */ - if (log_it) - ap_log_rerror(APLOG_MARK, APLOG_INFO|APLOG_NOERRNO, 0, r, - "proxy: missing or failed auth to %s", - ap_unparse_uri_components(r->pool, - &r->parsed_uri, UNP_OMITPATHINFO)); - - apr_table_setn(r->err_headers_out, "WWW-Authenticate", - apr_pstrcat(r->pool, "Basic realm=\"", - ap_unparse_uri_components(r->pool, &r->parsed_uri, - UNP_OMITPASSWORD|UNP_OMITPATHINFO), - "\"", NULL)); - - return HTTP_UNAUTHORIZED; -} - - -/* - * Handles direct access of ftp:// URLs - * Original (Non-PASV) version from - * Troy Morrison <spiffnet@zoom.com> - * PASV added by Chuck - * Filters by [Graham Leggett <minfrin@sharp.fm>] - */ -PROXY_DECLARE (int) ap_proxy_ftp_handler(request_rec *r, proxy_server_conf *conf, - char *url, const char *proxyhost, - apr_port_t proxyport) -{ - apr_pool_t *p = r->pool; - conn_rec *c = r->connection; - proxy_conn_rec *backend; - apr_socket_t *sock, *local_sock, *remote_sock; - apr_sockaddr_t *connect_addr; - apr_status_t rv; - conn_rec *origin, *remote; - int err; - apr_bucket *e; - apr_bucket_brigade *bb = apr_brigade_create(p); - apr_bucket_brigade *cbb = apr_brigade_create(p); - char *buf, *connectname; - apr_port_t connectport; - char buffer[MAX_STRING_LEN]; - char *path, *strp, *parms; - char *user = NULL; -/* char *account = NULL; how to supply an account in a URL? */ - const char *password = NULL; - int i, j, len, rc; - int one = 1; - char *size = NULL; - apr_size_t readbytes = -1; - - /* stuff for PASV mode */ - int connect = 0, use_port = 0; - char dates[AP_RFC822_DATE_LEN]; - - /* is this for us? */ - if (proxyhost) { - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: rejecting URL %s - proxyhost %s specified:", url, proxyhost); - return DECLINED; /* proxy connections are via HTTP */ - } - if (strncasecmp(url, "ftp:", 4)) { - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: rejecting URL %s - not ftp:", url); - return DECLINED; /* only interested in FTP */ - } - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: serving URL %s", url); - - /* create space for state information */ - backend = (proxy_conn_rec *) ap_get_module_config(c->conn_config, &proxy_ftp_module); - if (!backend) { - backend = ap_pcalloc(c->pool, sizeof(proxy_conn_rec)); - backend->connection = NULL; - backend->hostname = NULL; - backend->port = 0; - ap_set_module_config(c->conn_config, &proxy_ftp_module, backend); - } - - - /* - * I: Who Do I Connect To? - * ----------------------- - * - * Break up the URL to determine the host to connect to - */ - - /* we only support GET and HEAD */ - if (r->method_number != M_GET) - return HTTP_NOT_IMPLEMENTED; - - - /* We break the URL into host, port, path-search */ - connectname = r->parsed_uri.hostname; - connectport = (r->parsed_uri.port != 0) - ? r->parsed_uri.port - : ap_default_port_for_request(r); - path = apr_pstrdup(p, r->parsed_uri.path); - path = (path != NULL && path[0] != '\0') ? &path[1] : ""; - - parms = strchr(path, ';'); - if (parms != NULL) - *(parms++) = '\0'; - - /* The "Authorization:" header must be checked first. - * We allow the user to "override" the URL-coded user [ & password ] - * in the Browsers' User&Password Dialog. - * NOTE that this is only marginally more secure than having the - * password travel in plain as part of the URL, because Basic Auth - * simply uuencodes the plain text password. - * But chances are still smaller that the URL is logged regularly. - */ - if ((password = apr_table_get(r->headers_in, "Authorization")) != NULL - && strcasecmp(ap_getword(r->pool, &password, ' '), "Basic") == 0 - && (password = ap_pbase64decode(r->pool, password))[0] != ':') { - /* Note that this allocation has to be made from r->connection->pool - * because it has the lifetime of the connection. The other allocations - * are temporary and can be tossed away any time. - */ - user = ap_getword_nulls (r->connection->pool, &password, ':'); - r->ap_auth_type = "Basic"; - r->user = r->parsed_uri.user = user; - } - else if ((user = r->parsed_uri.user) != NULL) { - user = apr_pstrdup(p, user); - decodeenc(user); - if ((password = r->parsed_uri.password) != NULL) { - char *tmp = apr_pstrdup(p, password); - decodeenc(tmp); - password = tmp; - } - } - else { - user = "anonymous"; - password = "apache-proxy@"; - } - - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: connecting %s to %s:%d", url, connectname, connectport); - - /* do a DNS lookup for the destination host */ - err = apr_sockaddr_info_get(&connect_addr, connectname, APR_UNSPEC, connectport, 0, p); - - /* check if ProxyBlock directive on this host */ - if (OK != ap_proxy_checkproxyblock(r, conf, connect_addr)) { - return ap_proxyerror(r, HTTP_FORBIDDEN, - "Connect to remote machine blocked"); - } - - - /* - * II: Make the Connection - * ----------------------- - * - * We have determined who to connect to. Now make the connection. - */ - - /* get all the possible IP addresses for the destname and loop through them - * until we get a successful connection - */ - if (APR_SUCCESS != err) { - return ap_proxyerror(r, HTTP_BAD_GATEWAY, apr_pstrcat(p, - "DNS lookup failure for: ", - connectname, NULL)); - } - - - if ((rv = apr_socket_create(&sock, APR_INET, SOCK_STREAM, r->pool)) != APR_SUCCESS) { - ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, - "proxy: FTP: error creating socket"); - return HTTP_INTERNAL_SERVER_ERROR; - } - -#if !defined(TPF) && !defined(BEOS) - if (conf->recv_buffer_size > 0 - && (rv = apr_setsocketopt(sock, APR_SO_RCVBUF, - conf->recv_buffer_size))) { - ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, - "setsockopt(SO_RCVBUF): Failed to set ProxyReceiveBufferSize, using default"); - } -#endif - - if (APR_SUCCESS != (rv = apr_setsocketopt(sock, APR_SO_REUSEADDR, one))) { -#ifndef _OSD_POSIX /* BS2000 has this option "always on" */ - ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, - "proxy: FTP: error setting reuseaddr option: setsockopt(SO_REUSEADDR)"); - return HTTP_INTERNAL_SERVER_ERROR; -#endif /*_OSD_POSIX*/ - } - - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: socket has been created"); - - - /* - * At this point we have a list of one or more IP addresses of - * the machine to connect to. If configured, reorder this - * list so that the "best candidate" is first try. "best - * candidate" could mean the least loaded server, the fastest - * responding server, whatever. - * - * For now we do nothing, ie we get DNS round robin. - * XXX FIXME - */ - - - /* try each IP address until we connect successfully */ - { - int failed = 1; - while (connect_addr) { - - /* make the connection out of the socket */ - rv = apr_connect(sock, connect_addr); - - /* if an error occurred, loop round and try again */ - if (rv != APR_SUCCESS) { - ap_log_error(APLOG_MARK, APLOG_ERR, rv, r->server, - "proxy: FTP: attempt to connect to %pI (%s) failed", connect_addr, connectname); - connect_addr = connect_addr->next; - continue; - } - - /* if we get here, all is well */ - failed = 0; - break; - } - - /* handle a permanent error from the above loop */ - if (failed) { - return ap_proxyerror(r, HTTP_BAD_GATEWAY, apr_psprintf(r->pool, - "Could not connect to remote machine: %s port %d", - connectname, connectport)); - } - } - - /* the socket is now open, create a new connection */ - origin = ap_new_connection(p, r->server, sock, r->connection->id); - if (!origin) { - /* the peer reset the connection already; ap_new_connection() - * closed the socket */ - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: an error occurred creating a new connection to %pI (%s)", connect_addr, connectname); - return HTTP_INTERNAL_SERVER_ERROR; - } - - /* if a keepalive connection is floating around, close it first! */ - /* we might support ftp keepalives later, but not now... */ - if (backend->connection) { - apr_socket_close(backend->connection->client_socket); - backend->connection = NULL; - } - - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: control connection complete"); - - - /* - * III: Send Control Request - * ------------------------- - * - * Log into the ftp server, send the username & password, change to the correct - * directory... - */ - - /* set up the connection filters */ - ap_proxy_pre_http_connection(origin, NULL); - - /* possible results: */ - /* 120 Service ready in nnn minutes. */ - /* 220 Service ready for new user. */ - /* 421 Service not available, closing control connection. */ - i = ftp_getrc_msg(origin, cbb, buffer, sizeof(buffer)); - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: %d %s", i, buffer); - if (i == -1) { - return ap_proxyerror(r, HTTP_BAD_GATEWAY, "Error reading from remote server"); - } - if (i == 120) { - /* RFC2616 states: - * 14.37 Retry-After - * - * The Retry-After response-header field can be used with a 503 (Service - * Unavailable) response to indicate how long the service is expected to - * be unavailable to the requesting client. [...] The value of this field - * can be either an HTTP-date or an integer number of seconds (in decimal) - * after the time of the response. - * Retry-After = "Retry-After" ":" ( HTTP-date | delta-seconds ) - */ - for (i=0 ; buffer[i] && !isdigit(buffer[i]); i++); - if (buffer[i]) { - ap_table_add(r->headers_out, "Retry-After", apr_psprintf(p, "%lu", 60*atol(buffer+i))); - } - return ap_proxyerror(r, HTTP_SERVICE_UNAVAILABLE, buffer); - } - if (i != 220) { - return ap_proxyerror(r, HTTP_BAD_GATEWAY, buffer); - } - - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: connected."); - - buf = apr_pstrcat(p, "USER ", user, CRLF, NULL); - e = apr_bucket_pool_create(buf, strlen(buf), p); - APR_BRIGADE_INSERT_TAIL(bb, e); - e = apr_bucket_flush_create(); - APR_BRIGADE_INSERT_TAIL(bb, e); - ap_pass_brigade(origin->output_filters, bb); - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: USER %s", user); - - /* possible results; 230, 331, 332, 421, 500, 501, 530 */ - /* states: 1 - error, 2 - success; 3 - send password, 4,5 fail */ - /* 230 User logged in, proceed. */ - /* 331 User name okay, need password. */ - /* 332 Need account for login. */ - /* 421 Service not available, closing control connection. */ - /* 500 Syntax error, command unrecognized. */ - /* (This may include errors such as command line too long.) */ - /* 501 Syntax error in parameters or arguments. */ - /* 530 Not logged in. */ - i = ftp_getrc_msg(origin, cbb, buffer, sizeof(buffer)); - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: %d %s", i, buffer); - if (i == -1) { - return ap_proxyerror(r, HTTP_BAD_GATEWAY, "Error reading from remote server"); - } - if (i == 530) { - return ftp_unauthorized (r, 1); /* log it: user name guessing attempt? */ - } - if (i != 230 && i != 331) { - return ap_proxyerror(r, HTTP_BAD_GATEWAY, buffer); - } - - if (i == 331) { /* send password */ - if (password == NULL) { - return ftp_unauthorized (r, 0); - } - buf = apr_pstrcat(p, "PASS ", password, CRLF, NULL); - e = apr_bucket_pool_create(buf, strlen(buf), p); - APR_BRIGADE_INSERT_TAIL(bb, e); - e = apr_bucket_flush_create(); - APR_BRIGADE_INSERT_TAIL(bb, e); - ap_pass_brigade(origin->output_filters, bb); - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: PASS %s", password); - - /* possible results 202, 230, 332, 421, 500, 501, 503, 530 */ - /* 230 User logged in, proceed. */ - /* 332 Need account for login. */ - /* 421 Service not available, closing control connection. */ - /* 500 Syntax error, command unrecognized. */ - /* 501 Syntax error in parameters or arguments. */ - /* 503 Bad sequence of commands. */ - /* 530 Not logged in. */ - i = ftp_getrc_msg(origin, cbb, buffer, sizeof(buffer)); - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: %d %s", i, buffer); - if (i == -1) { - return ap_proxyerror(r, HTTP_BAD_GATEWAY, - "Error reading from remote server"); - } - if (i == 332) { - return ap_proxyerror(r, HTTP_UNAUTHORIZED, - apr_pstrcat(p, "Need account for login: ", buffer, NULL)); - } - /* @@@ questionable -- we might as well return a 403 Forbidden here */ - if (i == 530) { - return ftp_unauthorized (r, 1); /* log it: passwd guessing attempt? */ - } - if (i != 230 && i != 202) { - return ap_proxyerror(r, HTTP_BAD_GATEWAY, buffer); - } - } - apr_table_set(r->notes, "Directory-README", buffer); - - /* set the directory (walk directory component by component): - * this is what we must do if we don't know the OS type of the remote - * machine - */ - for (;;) { - strp = strchr(path, '/'); - if (strp == NULL) - break; - *strp = '\0'; - - len = decodeenc(path); - buf = apr_pstrcat(p, "CWD ", path, CRLF, NULL); - e = apr_bucket_pool_create(buf, strlen(buf), p); - APR_BRIGADE_INSERT_TAIL(bb, e); - e = apr_bucket_flush_create(); - APR_BRIGADE_INSERT_TAIL(bb, e); - ap_pass_brigade(origin->output_filters, bb); - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: CWD %s", path); - *strp = '/'; - /* responses: 250, 421, 500, 501, 502, 530, 550 */ - /* 250 Requested file action okay, completed. */ - /* 421 Service not available, closing control connection. */ - /* 500 Syntax error, command unrecognized. */ - /* 501 Syntax error in parameters or arguments. */ - /* 502 Command not implemented. */ - /* 530 Not logged in. */ - /* 550 Requested action not taken. */ - i = ftp_getrc_msg(origin, cbb, buffer, sizeof(buffer)); - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: %d %s", i, buffer); - if (i == -1) { - return ap_proxyerror(r, HTTP_BAD_GATEWAY, - "Error reading from remote server"); - } - if (i == 550) { - return ap_proxyerror(r, HTTP_NOT_FOUND, buffer); - } - if (i != 250) { - return ap_proxyerror(r, HTTP_BAD_GATEWAY, buffer); - } - - path = strp + 1; - } - - if (parms != NULL && strncasecmp(parms, "type=a", 6) == 0) { - parms = "A"; - } - else { - parms = "I"; - } - - /* changed to make binary transfers the default */ - /* set type to binary */ - buf = apr_pstrcat(p, "TYPE ", parms, CRLF, NULL); - e = apr_bucket_pool_create(buf, strlen(buf), p); - APR_BRIGADE_INSERT_TAIL(bb, e); - e = apr_bucket_flush_create(); - APR_BRIGADE_INSERT_TAIL(bb, e); - ap_pass_brigade(origin->output_filters, bb); - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: TYPE I"); - /* responses: 200, 421, 500, 501, 504, 530 */ - /* 200 Command okay. */ - /* 421 Service not available, closing control connection. */ - /* 500 Syntax error, command unrecognized. */ - /* 501 Syntax error in parameters or arguments. */ - /* 504 Command not implemented for that parameter. */ - /* 530 Not logged in. */ - i = ftp_getrc_msg(origin, cbb, buffer, sizeof(buffer)); - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: %d %s", i, buffer); - if (i == -1) { - return ap_proxyerror(r, HTTP_BAD_GATEWAY, - "Error reading from remote server"); - } - if (i != 200 && i != 504) { - return ap_proxyerror(r, HTTP_BAD_GATEWAY, buffer); - } - /* Allow not implemented */ - if (i == 504) { - parms[0] = '\0'; - } - - - /* - * IV: Make Data Connection? - * ------------------------- - * - * Try EPSV, if that fails... - * try PASV, if that fails... - * try PORT. - */ -/* this temporarily switches off EPSV/PASV */ -/*goto bypass;*/ - - /* set up data connection - EPSV */ - { - apr_sockaddr_t *remote_addr; - char *remote_ip; - apr_port_t remote_port; - - /* The EPSV command replaces PASV where both IPV4 and IPV6 is supported. Only - * the port is returned, the IP address is always the same as that on the - * control connection. Example: - * Entering Extended Passive Mode (|||6446|) - */ - buf = apr_pstrcat(p, "EPSV", CRLF, NULL); - e = apr_bucket_pool_create(buf, strlen(buf), p); - APR_BRIGADE_INSERT_TAIL(bb, e); - e = apr_bucket_flush_create(); - APR_BRIGADE_INSERT_TAIL(bb, e); - ap_pass_brigade(origin->output_filters, bb); - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: EPSV"); - /* possible results: 227, 421, 500, 501, 502, 530 */ - /* 227 Entering Passive Mode (h1,h2,h3,h4,p1,p2). */ - /* 421 Service not available, closing control connection. */ - /* 500 Syntax error, command unrecognized. */ - /* 501 Syntax error in parameters or arguments. */ - /* 502 Command not implemented. */ - /* 530 Not logged in. */ - i = ftp_getrc_msg(origin, cbb, buffer, sizeof(buffer)); - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: %d %s", i, buffer); - if (i == -1) { - return ap_proxyerror(r, HTTP_BAD_GATEWAY, - "Error reading from remote server"); - } - if (i != 229 && i != 500 && i != 501 && i != 502) { - return ap_proxyerror(r, HTTP_BAD_GATEWAY, buffer); - } - else if (i == 229) { - char *pstr; - - pstr = apr_pstrdup(p, buffer); - pstr = strtok(pstr, " "); /* separate result code */ - if (pstr != NULL) { - if (*(pstr + strlen(pstr) + 1) == '=') { - pstr += strlen(pstr) + 2; - } - else { - pstr = strtok(NULL, "("); /* separate address & port params */ - if (pstr != NULL) - pstr = strtok(NULL, ")"); - } - } - - if (pstr) { - apr_sockaddr_t *epsv_addr; - remote_port = atoi(pstr+3); - - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: EPSV contacting remote host on port %d", - remote_port); - - if ((rv = apr_socket_create(&remote_sock, APR_INET, SOCK_STREAM, r->pool)) != APR_SUCCESS) { - ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, - "proxy: FTP: error creating EPSV socket"); - return HTTP_INTERNAL_SERVER_ERROR; - } - -#if !defined (TPF) && !defined(BEOS) - if (conf->recv_buffer_size > 0 && (rv = apr_setsocketopt(remote_sock, APR_SO_RCVBUF, - conf->recv_buffer_size))) { - ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, - "proxy: FTP: setsockopt(SO_RCVBUF): Failed to set ProxyReceiveBufferSize, using default"); - } -#endif - - /* make the connection */ - apr_socket_addr_get(&remote_addr, APR_REMOTE, sock); - apr_sockaddr_ip_get(&remote_ip, remote_addr); - apr_sockaddr_info_get(&epsv_addr, remote_ip, APR_INET, remote_port, 0, p); - rv = apr_connect(remote_sock, epsv_addr); - if (rv != APR_SUCCESS) { - ap_log_error(APLOG_MARK, APLOG_ERR, rv, r->server, - "proxy: FTP: EPSV attempt to connect to %pI failed - Firewall/NAT?", epsv_addr); - return ap_proxyerror(r, HTTP_BAD_GATEWAY, apr_psprintf(r->pool, - "EPSV attempt to connect to %pI failed - firewall/NAT?", epsv_addr)); - } - else { - connect = 1; - } - } - else { - /* and try the regular way */ - apr_socket_close(remote_sock); - } - } - } - - /* set up data connection - PASV */ - if (!connect) { - buf = apr_pstrcat(p, "PASV", CRLF, NULL); - e = apr_bucket_pool_create(buf, strlen(buf), p); - APR_BRIGADE_INSERT_TAIL(bb, e); - e = apr_bucket_flush_create(); - APR_BRIGADE_INSERT_TAIL(bb, e); - ap_pass_brigade(origin->output_filters, bb); - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: PASV"); - /* possible results: 227, 421, 500, 501, 502, 530 */ - /* 227 Entering Passive Mode (h1,h2,h3,h4,p1,p2). */ - /* 421 Service not available, closing control connection. */ - /* 500 Syntax error, command unrecognized. */ - /* 501 Syntax error in parameters or arguments. */ - /* 502 Command not implemented. */ - /* 530 Not logged in. */ - i = ftp_getrc_msg(origin, cbb, buffer, sizeof(buffer)); - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: %d %s", i, buffer); - if (i == -1) { - return ap_proxyerror(r, HTTP_BAD_GATEWAY, - "Error reading from remote server"); - } - if (i != 227 && i != 502) { - return ap_proxyerror(r, HTTP_BAD_GATEWAY, buffer); - } - else if (i == 227) { - unsigned int h0, h1, h2, h3, p0, p1; - char *pstr; - -/* FIXME: Check PASV against RFC1123 */ - - pstr = apr_pstrdup(p, buffer); - pstr = strtok(pstr, " "); /* separate result code */ - if (pstr != NULL) { - if (*(pstr + strlen(pstr) + 1) == '=') { - pstr += strlen(pstr) + 2; - } - else { - pstr = strtok(NULL, "("); /* separate address & port params */ - if (pstr != NULL) - pstr = strtok(NULL, ")"); - } - } - -/* FIXME: Only supports IPV4 - fix in RFC2428 */ - - if (pstr != NULL && (sscanf(pstr, - "%d,%d,%d,%d,%d,%d", &h3, &h2, &h1, &h0, &p1, &p0) == 6)) { - - apr_sockaddr_t *pasv_addr; - int pasvport = (p1 << 8) + p0; - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: PASV contacting host %d.%d.%d.%d:%d", - h3, h2, h1, h0, pasvport); - - if ((rv = apr_socket_create(&remote_sock, APR_INET, SOCK_STREAM, r->pool)) != APR_SUCCESS) { - ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, - "proxy: error creating PASV socket"); - return HTTP_INTERNAL_SERVER_ERROR; - } - -#if !defined (TPF) && !defined(BEOS) - if (conf->recv_buffer_size > 0 && (rv = apr_setsocketopt(remote_sock, APR_SO_RCVBUF, - conf->recv_buffer_size))) { - ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, - "proxy: FTP: setsockopt(SO_RCVBUF): Failed to set ProxyReceiveBufferSize, using default"); - } -#endif - - /* make the connection */ - apr_sockaddr_info_get(&pasv_addr, apr_psprintf(p, "%d.%d.%d.%d", h3, h2, h1, h0), APR_INET, pasvport, 0, p); - rv = apr_connect(remote_sock, pasv_addr); - if (rv != APR_SUCCESS) { - ap_log_error(APLOG_MARK, APLOG_ERR, rv, r->server, - "proxy: FTP: PASV attempt to connect to %pI failed - Firewall/NAT?", pasv_addr); - return ap_proxyerror(r, HTTP_BAD_GATEWAY, apr_psprintf(r->pool, - "PASV attempt to connect to %pI failed - firewall/NAT?", pasv_addr)); - } - else { - connect = 1; - } - } - else { - /* and try the regular way */ - apr_socket_close(remote_sock); - } - } - } -/*bypass:*/ - - /* set up data connection - PORT */ - if (!connect) { - apr_sockaddr_t *local_addr; - char *local_ip; - apr_port_t local_port; - unsigned int h0, h1, h2, h3, p0, p1; - - if ((rv = apr_socket_create(&local_sock, APR_INET, SOCK_STREAM, r->pool)) != APR_SUCCESS) { - ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, - "proxy: FTP: error creating local socket"); - return HTTP_INTERNAL_SERVER_ERROR; - } - apr_socket_addr_get(&local_addr, APR_LOCAL, sock); - apr_sockaddr_port_get(&local_port, local_addr); - apr_sockaddr_ip_get(&local_ip, local_addr); - - if ((rv = apr_setsocketopt(local_sock, APR_SO_REUSEADDR, one)) != APR_SUCCESS) { -#ifndef _OSD_POSIX /* BS2000 has this option "always on" */ - ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, - "proxy: FTP: error setting reuseaddr option"); - return HTTP_INTERNAL_SERVER_ERROR; -#endif /*_OSD_POSIX*/ - } - - apr_sockaddr_info_get(&local_addr, local_ip, APR_UNSPEC, local_port, 0, r->pool); - - if ((rv = apr_bind(local_sock, local_addr)) != APR_SUCCESS) { - ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, - "proxy: FTP: error binding to ftp data socket %pI", local_addr); - return HTTP_INTERNAL_SERVER_ERROR; - } - - /* only need a short queue */ - if ((rv = apr_listen(local_sock, 2)) != APR_SUCCESS) { - ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, - "proxy: FTP: error listening to ftp data socket %pI", local_addr); - return HTTP_INTERNAL_SERVER_ERROR; - } - -/* FIXME: Sent PORT here */ - - if (local_ip && (sscanf(local_ip, - "%d.%d.%d.%d", &h3, &h2, &h1, &h0) == 4)) { - p1 = (local_port >> 8); - p0 = (local_port & 0xFF); - - buf = apr_psprintf(p, "PORT %d,%d,%d,%d,%d,%d" CRLF, h3, h2, h1, h0, p1, p0); - e = apr_bucket_pool_create(buf, strlen(buf), p); - APR_BRIGADE_INSERT_TAIL(bb, e); - e = apr_bucket_flush_create(); - APR_BRIGADE_INSERT_TAIL(bb, e); - ap_pass_brigade(origin->output_filters, bb); - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: PORT %d,%d,%d,%d,%d,%d", h3, h2, h1, h0, p1, p0); - /* possible results: 200, 421, 500, 501, 502, 530 */ - /* 200 Command okay. */ - /* 421 Service not available, closing control connection. */ - /* 500 Syntax error, command unrecognized. */ - /* 501 Syntax error in parameters or arguments. */ - /* 502 Command not implemented. */ - /* 530 Not logged in. */ - rc = ftp_getrc_msg(origin, cbb, buffer, sizeof(buffer)); - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: %d %s", rc, buffer); - if (rc == -1) { - return ap_proxyerror(r, HTTP_BAD_GATEWAY, - "Error reading from remote server"); - } - if (rc != 200) { - return ap_proxyerror(r, HTTP_BAD_GATEWAY, buffer); - } - - /* signal that we must use the EPRT/PORT loop */ - use_port = 1; - } - else { -/* IPV6 FIXME: - * The EPRT command replaces PORT where both IPV4 and IPV6 is supported. The first - * number (1,2) indicates the protocol type. Examples: - * EPRT |1|132.235.1.2|6275| - * EPRT |2|1080::8:800:200C:417A|5282| - */ - return ap_proxyerror(r, HTTP_NOT_IMPLEMENTED, "Connect to IPV6 ftp server using EPRT not supported. Enable EPSV."); - } - } - - - /* - * V: Set The Headers - * ------------------- - * - * Get the size of the request, set up the environment for HTTP. - */ - - /* set request; "path" holds last path component */ - len = decodeenc(path); - - /* TM - if len == 0 then it must be a directory (you can't RETR nothing) */ - - if (len == 0) { - parms = "d"; - } - else { - buf = apr_pstrcat(p, "SIZE ", path, CRLF, NULL); - e = apr_bucket_pool_create(buf, strlen(buf), p); - APR_BRIGADE_INSERT_TAIL(bb, e); - e = apr_bucket_flush_create(); - APR_BRIGADE_INSERT_TAIL(bb, e); - ap_pass_brigade(origin->output_filters, bb); - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: SIZE %s", path); - i = ftp_getrc_msg(origin, cbb, buffer, sizeof buffer); - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: returned status %d with response %s", i, buffer); - if (i != 500) { /* Size command not recognized */ - if (i == 550) { /* Not a regular file */ - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: SIZE shows this is a directory"); - parms = "d"; - buf = apr_pstrcat(p, "CWD ", path, CRLF, NULL); - e = apr_bucket_pool_create(buf, strlen(buf), p); - APR_BRIGADE_INSERT_TAIL(bb, e); - e = apr_bucket_flush_create(); - APR_BRIGADE_INSERT_TAIL(bb, e); - ap_pass_brigade(origin->output_filters, bb); - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: CWD %s", path); - i = ftp_getrc_msg(origin, cbb, buffer, sizeof(buffer)); - /* possible results: 250, 421, 500, 501, 502, 530, 550 */ - /* 250 Requested file action okay, completed. */ - /* 421 Service not available, closing control connection. */ - /* 500 Syntax error, command unrecognized. */ - /* 501 Syntax error in parameters or arguments. */ - /* 502 Command not implemented. */ - /* 530 Not logged in. */ - /* 550 Requested action not taken. */ - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: %d %s", i, buffer); - if (i == -1) { - return ap_proxyerror(r, HTTP_BAD_GATEWAY, - "Error reading from remote server"); - } - if (i == 550) { - return ap_proxyerror(r, HTTP_NOT_FOUND, buffer); - } - if (i != 250) { - return ap_proxyerror(r, HTTP_BAD_GATEWAY, buffer); - } - path = ""; - len = 0; - } - else if (i == 213) { /* Size command ok */ - for (j = 0; j < sizeof(buffer) && apr_isdigit(buffer[j]); j++); - buffer[j] = '\0'; - if (buffer[0] != '\0') - size = apr_pstrdup(p, buffer); - } - } - } - - - -#ifdef AUTODETECT_PWD - buf = apr_pstrcat(p, "PWD", CRLF, NULL); - e = apr_bucket_pool_create(buf, strlen(buf), p); - APR_BRIGADE_INSERT_TAIL(bb, e); - e = apr_bucket_flush_create(); - APR_BRIGADE_INSERT_TAIL(bb, e); - ap_pass_brigade(origin->output_filters, bb); - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: PWD"); - /* responses: 257, 500, 501, 502, 421, 550 */ - /* 257 "<directory-name>" <commentary> */ - /* 421 Service not available, closing control connection. */ - /* 500 Syntax error, command unrecognized. */ - /* 501 Syntax error in parameters or arguments. */ - /* 502 Command not implemented. */ - /* 550 Requested action not taken. */ - i = ftp_getrc_msg(origin, cbb, buffer, sizeof(buffer)); - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: %d %s", i, buffer); - if (i == -1 || i == 421) { - return ap_proxyerror(r, HTTP_BAD_GATEWAY, - "Error reading from remote server"); - } - if (i == 550) { - return ap_proxyerror(r, HTTP_NOT_FOUND, buffer); - } - if (i == 257) { - const char *dirp = buffer; - apr_table_set(r->notes, "Directory-PWD", ap_getword_conf(r->pool, &dirp)); - } -#endif /*AUTODETECT_PWD*/ - - if (parms[0] == 'd') { - if (len != 0) - buf = apr_pstrcat(p, "LIST ", path, CRLF, NULL); - else - buf = apr_pstrcat(p, "LIST -lag", CRLF, NULL); - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: LIST %s", (len == 0 ? "-lag" : path)); - } - else { -/* FIXME: Handle range requests - send REST */ - buf = apr_pstrcat(p, "RETR ", path, CRLF, NULL); - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: RETR %s", path); - } - e = apr_bucket_pool_create(buf, strlen(buf), p); - APR_BRIGADE_INSERT_TAIL(bb, e); - e = apr_bucket_flush_create(); - APR_BRIGADE_INSERT_TAIL(bb, e); - ap_pass_brigade(origin->output_filters, bb); - /* RETR: 110, 125, 150, 226, 250, 421, 425, 426, 450, 451, 500, 501, 530, 550 - * NLST: 125, 150, 226, 250, 421, 425, 426, 450, 451, 500, 501, 502, 530 */ - /* 110 Restart marker reply. */ - /* 125 Data connection already open; transfer starting. */ - /* 150 File status okay; about to open data connection. */ - /* 226 Closing data connection. */ - /* 250 Requested file action okay, completed. */ - /* 421 Service not available, closing control connection. */ - /* 425 Can't open data connection. */ - /* 426 Connection closed; transfer aborted. */ - /* 450 Requested file action not taken. */ - /* 451 Requested action aborted. Local error in processing. */ - /* 500 Syntax error, command unrecognized. */ - /* 501 Syntax error in parameters or arguments. */ - /* 530 Not logged in. */ - /* 550 Requested action not taken. */ - rc = ftp_getrc_msg(origin, cbb, buffer, sizeof(buffer)); - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: %d %s", rc, buffer); - if (rc == -1) { - return ap_proxyerror(r, HTTP_BAD_GATEWAY, - "Error reading from remote server"); - } - if (rc == 550) { - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: RETR failed, trying LIST instead"); - parms = "d"; - buf = apr_pstrcat(p, "CWD ", path, CRLF, NULL); - e = apr_bucket_pool_create(buf, strlen(buf), p); - APR_BRIGADE_INSERT_TAIL(bb, e); - e = apr_bucket_flush_create(); - APR_BRIGADE_INSERT_TAIL(bb, e); - ap_pass_brigade(origin->output_filters, bb); - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: CWD %s", path); - /* possible results: 250, 421, 500, 501, 502, 530, 550 */ - /* 250 Requested file action okay, completed. */ - /* 421 Service not available, closing control connection. */ - /* 500 Syntax error, command unrecognized. */ - /* 501 Syntax error in parameters or arguments. */ - /* 502 Command not implemented. */ - /* 530 Not logged in. */ - /* 550 Requested action not taken. */ - rc = ftp_getrc_msg(origin, cbb, buffer, sizeof(buffer)); - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: %d %s", rc, buffer); - if (rc == -1) { - return ap_proxyerror(r, HTTP_BAD_GATEWAY, - "Error reading from remote server"); - } - if (rc == 550) { - return ap_proxyerror(r, HTTP_NOT_FOUND, buffer); - } - if (rc != 250) { - return ap_proxyerror(r, HTTP_BAD_GATEWAY, buffer); - } - -#ifdef AUTODETECT_PWD - buf = apr_pstrcat(p, "PWD ", CRLF, NULL); - e = apr_bucket_pool_create(buf, strlen(buf), p); - APR_BRIGADE_INSERT_TAIL(bb, e); - e = apr_bucket_flush_create(); - APR_BRIGADE_INSERT_TAIL(bb, e); - ap_pass_brigade(origin->output_filters, bb); - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: PWD"); - /* responses: 257, 500, 501, 502, 421, 550 */ - /* 257 "<directory-name>" <commentary> */ - /* 421 Service not available, closing control connection. */ - /* 500 Syntax error, command unrecognized. */ - /* 501 Syntax error in parameters or arguments. */ - /* 502 Command not implemented. */ - /* 550 Requested action not taken. */ - i = ftp_getrc_msg(origin, cbb, buffer, sizeof(buffer)); - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: %d %s", i, buffer); - if (i == -1 || i == 421) { - return ap_proxyerror(r, HTTP_BAD_GATEWAY, - "Error reading from remote server"); - } - if (i == 550) { - return ap_proxyerror(r, HTTP_NOT_FOUND, buffer); - } - if (i == 257) { - const char *dirp = buffer; - apr_table_set(r->notes, "Directory-PWD", ap_getword_conf(r->pool, &dirp)); - } -#endif /*AUTODETECT_PWD*/ - - buf = apr_pstrcat(p, "LIST -lag", CRLF, NULL); - e = apr_bucket_pool_create(buf, strlen(buf), p); - APR_BRIGADE_INSERT_TAIL(bb, e); - e = apr_bucket_flush_create(); - APR_BRIGADE_INSERT_TAIL(bb, e); - ap_pass_brigade(origin->output_filters, bb); - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: LIST -lag"); - rc = ftp_getrc_msg(origin, cbb, buffer, sizeof(buffer)); - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: %d %s", rc, buffer); - if (rc == -1) - return ap_proxyerror(r, HTTP_BAD_GATEWAY, - "Error reading from remote server"); - } - if (rc != 125 && rc != 150 && rc != 226 && rc != 250) { - return ap_proxyerror(r, HTTP_BAD_GATEWAY, buffer); - } - - r->status = HTTP_OK; - r->status_line = "200 OK"; - - apr_rfc822_date(dates, r->request_time); - apr_table_setn(r->headers_out, "Date", dates); - apr_table_setn(r->headers_out, "Server", ap_get_server_version()); - - /* set content-type */ - if (parms[0] == 'd') { - r->content_type = "text/html"; - } - else { - if (r->content_type) { - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: Content-Type set to %s", r->content_type); - } - else { - r->content_type = ap_default_type(r); - } - if (parms[0] != 'a' && size != NULL) { - /* We "trust" the ftp server to really serve (size) bytes... */ - apr_table_setn(r->headers_out, "Content-Length", size); - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: Content-Length set to %s", size); - } - } - apr_table_setn(r->headers_out, "Content-Type", r->content_type); - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: Content-Type set to %s", r->content_type); - - /* set content-encoding */ - if (r->content_encoding != NULL && r->content_encoding[0] != '\0') { - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: Content-Encoding set to %s", r->content_encoding); - apr_table_setn(r->headers_out, "Content-Encoding", r->content_encoding); - } - - /* wait for connection */ - if (use_port) { - for(;;) - { -/* FIXME: this does not return, despite the incoming connection being accepted */ - switch(rv = apr_accept(&remote_sock, local_sock, r->pool)) - { - case APR_EINTR: - continue; - case APR_SUCCESS: - break; - default: - ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, - "proxy: FTP: failed to accept data connection"); - return HTTP_BAD_GATEWAY; - } - } - } - - /* the transfer socket is now open, create a new connection */ - remote = ap_new_connection(p, r->server, remote_sock, r->connection->id); - if (!remote) { - /* the peer reset the connection already; ap_new_connection() - * closed the socket */ - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: an error occurred creating the transfer connection"); - return HTTP_INTERNAL_SERVER_ERROR; - } - - /* set up the connection filters */ - ap_proxy_pre_http_connection(remote, NULL); - - - /* - * VI: Receive the Response - * ------------------------ - * - * Get response from the remote ftp socket, and pass it up the - * filter chain. - */ - - /* send response */ - r->sent_bodyct = 1; - - if (parms[0] == 'd') { - /* insert directory filter */ - ap_add_output_filter("PROXY_SEND_DIR", NULL, r, r->connection); - } - - /* send body */ - if (!r->header_only) { - - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: start body send"); - - /* read the body, pass it to the output filters */ - while (ap_get_brigade(remote->input_filters, bb, AP_MODE_BLOCKING, &readbytes) == APR_SUCCESS) { - if (APR_BUCKET_IS_EOS(APR_BRIGADE_LAST(bb))) { - e = apr_bucket_flush_create(); - APR_BRIGADE_INSERT_TAIL(bb, e); - ap_pass_brigade(r->output_filters, bb); - break; - } - ap_pass_brigade(r->output_filters, bb); - apr_brigade_cleanup(bb); - } - apr_brigade_cleanup(bb); - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: end body send"); - - } - else { - - /* abort the transfer */ - buf = apr_pstrcat(p, "ABOR", CRLF, NULL); - e = apr_bucket_pool_create(buf, strlen(buf), p); - APR_BRIGADE_INSERT_TAIL(bb, e); - e = apr_bucket_flush_create(); - APR_BRIGADE_INSERT_TAIL(bb, e); - ap_pass_brigade(origin->output_filters, bb); - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: ABOR"); - /* responses: 225, 226, 421, 500, 501, 502 */ - /* 225 Data connection open; no transfer in progress. */ - /* 226 Closing data connection. */ - /* 421 Service not available, closing control connection. */ - /* 500 Syntax error, command unrecognized. */ - /* 501 Syntax error in parameters or arguments. */ - /* 502 Command not implemented. */ - i = ftp_getrc_msg(origin, cbb, buffer, sizeof(buffer)); - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: %d %s", i, buffer); - } - - - /* - * VII: Clean Up - * ------------- - * - * If there are no KeepAlives, or if the connection has been signalled - * to close, close the socket and clean up - */ - - /* finish */ - buf = apr_pstrcat(p, "QUIT", CRLF, NULL); - e = apr_bucket_pool_create(buf, strlen(buf), p); - APR_BRIGADE_INSERT_TAIL(bb, e); - e = apr_bucket_flush_create(); - APR_BRIGADE_INSERT_TAIL(bb, e); - ap_pass_brigade(origin->output_filters, bb); - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: QUIT"); - /* responses: 221, 500 */ - /* 221 Service closing control connection. */ - /* 500 Syntax error, command unrecognized. */ - i = ftp_getrc_msg(origin, cbb, buffer, sizeof(buffer)); - ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r->server, - "proxy: FTP: %d %s", i, buffer); - - apr_brigade_destroy(bb); - return OK; -} - -static void ap_proxy_ftp_register_hook(apr_pool_t *p) -{ - /* hooks */ - proxy_hook_scheme_handler(ap_proxy_ftp_handler, NULL, NULL, APR_HOOK_MIDDLE); - proxy_hook_canon_handler(ap_proxy_ftp_canon, NULL, NULL, APR_HOOK_MIDDLE); - /* filters */ - ap_register_output_filter("PROXY_SEND_DIR", ap_proxy_send_dir_filter, AP_FTYPE_CONTENT); -} - -module AP_MODULE_DECLARE_DATA proxy_ftp_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_ftp_register_hook /* register hooks */ -}; |