| /* ==================================================================== |
| * 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. |
| */ |
| |
| /* TODO - put timeouts back in */ |
| /* |
| * rfc1413() speaks a common subset of the RFC 1413, AUTH, TAP and IDENT |
| * protocols. The code queries an RFC 1413 etc. compatible daemon on a remote |
| * host to look up the owner of a connection. The information should not be |
| * used for authentication purposes. This routine intercepts alarm signals. |
| * |
| * Diagnostics are reported through syslog(3). |
| * |
| * Author: Wietse Venema, Eindhoven University of Technology, |
| * The Netherlands. |
| */ |
| |
| /* Some small additions for Apache --- ditch the "sccsid" var if |
| * compiling with gcc (it *has* changed), include ap_config.h for the |
| * prototypes it defines on at least one system (SunlOSs) which has |
| * them missing from the standard header files, and one minor change |
| * below (extra parens around assign "if (foo = bar) ..." to shut up |
| * gcc -Wall). |
| */ |
| |
| /* Rewritten by David Robinson */ |
| |
| #include "apr.h" |
| #include "apr_network_io.h" |
| #include "apr_strings.h" |
| #include "apr_lib.h" |
| |
| #define APR_WANT_STDIO |
| #define APR_WANT_STRFUNC |
| #include "apr_want.h" |
| |
| #include "ap_config.h" |
| #include "httpd.h" /* for server_rec, conn_rec, etc. */ |
| #include "http_log.h" /* for aplog_error */ |
| #include "rfc1413.h" |
| #include "http_main.h" /* set_callback_and_alarm */ |
| #include "util_ebcdic.h" |
| |
| /* Local stuff. */ |
| /* Semi-well-known port */ |
| #define RFC1413_PORT 113 |
| /* maximum allowed length of userid */ |
| #define RFC1413_USERLEN 512 |
| /* rough limit on the amount of data we accept. */ |
| #define RFC1413_MAXDATA 1000 |
| |
| #ifndef RFC1413_TIMEOUT |
| #define RFC1413_TIMEOUT 30 |
| #endif |
| #define FROM_UNKNOWN "unknown" |
| |
| int ap_rfc1413_timeout = RFC1413_TIMEOUT; /* Global so it can be changed */ |
| |
| static apr_status_t rfc1413_connect(apr_socket_t **newsock, conn_rec *conn, |
| server_rec *srv) |
| { |
| apr_status_t rv; |
| apr_sockaddr_t *localsa, *destsa; |
| |
| if ((rv = apr_sockaddr_info_get(&localsa, conn->local_ip, APR_UNSPEC, |
| 0, /* ephemeral port */ |
| 0, conn->pool)) != APR_SUCCESS) { |
| /* This should not fail since we have a numeric address string |
| * as the host. */ |
| ap_log_error(APLOG_MARK, APLOG_CRIT, rv, srv, |
| "rfc1413: apr_sockaddr_info_get(%s) failed", |
| conn->local_ip); |
| return rv; |
| } |
| |
| if ((rv = apr_sockaddr_info_get(&destsa, conn->remote_ip, |
| localsa->sa.sin.sin_family, /* has to match */ |
| RFC1413_PORT, 0, conn->pool)) != APR_SUCCESS) { |
| /* This should not fail since we have a numeric address string |
| * as the host. */ |
| ap_log_error(APLOG_MARK, APLOG_CRIT, rv, srv, |
| "rfc1413: apr_sockaddr_info_get(%s) failed", |
| conn->remote_ip); |
| return rv; |
| } |
| |
| if ((rv = apr_socket_create(newsock, |
| localsa->sa.sin.sin_family, /* has to match */ |
| SOCK_STREAM, conn->pool)) != APR_SUCCESS) { |
| ap_log_error(APLOG_MARK, APLOG_CRIT, rv, srv, |
| "rfc1413: error creating query socket"); |
| return rv; |
| } |
| |
| if ((rv = apr_setsocketopt(*newsock, APR_SO_TIMEOUT, |
| (apr_int32_t)(ap_rfc1413_timeout |
| * APR_USEC_PER_SEC))) |
| != APR_SUCCESS) { |
| ap_log_error(APLOG_MARK, APLOG_CRIT, rv, srv, |
| "rfc1413: error setting query socket timeout"); |
| apr_socket_close(*newsock); |
| return rv; |
| } |
| |
| /* |
| * Bind the local and remote ends of the query socket to the same |
| * IP addresses as the connection under investigation. We go |
| * through all this trouble because the local or remote system |
| * might have more than one network address. The RFC1413 etc. |
| * client sends only port numbers; the server takes the IP |
| * addresses from the query socket. |
| */ |
| |
| if ((rv = apr_bind(*newsock, localsa)) != APR_SUCCESS) { |
| ap_log_error(APLOG_MARK, APLOG_CRIT, rv, srv, |
| "rfc1413: Error binding query socket to local port"); |
| apr_socket_close(*newsock); |
| return rv; |
| } |
| |
| /* |
| * errors from connect usually imply the remote machine doesn't support |
| * the service; don't log such an error |
| */ |
| if ((rv = apr_connect(*newsock, destsa)) != APR_SUCCESS) { |
| apr_socket_close(*newsock); |
| return rv; |
| } |
| |
| return APR_SUCCESS; |
| } |
| |
| static apr_status_t rfc1413_query(apr_socket_t *sock, conn_rec *conn, |
| server_rec *srv) |
| { |
| apr_port_t rmt_port, our_port; |
| apr_port_t sav_rmt_port, sav_our_port; |
| apr_size_t i; |
| char *cp; |
| char buffer[RFC1413_MAXDATA + 1]; |
| char user[RFC1413_USERLEN + 1]; /* XXX */ |
| apr_size_t buflen; |
| apr_sockaddr_t *localsa; |
| |
| apr_socket_addr_get(&localsa, APR_LOCAL, sock); |
| apr_sockaddr_port_get(&sav_our_port, localsa); |
| sav_rmt_port = RFC1413_PORT; |
| |
| /* send the data */ |
| buflen = apr_snprintf(buffer, sizeof(buffer), "%hu,%hu\r\n", sav_rmt_port, |
| sav_our_port); |
| ap_xlate_proto_to_ascii(buffer, buflen); |
| |
| /* send query to server. Handle short write. */ |
| i = 0; |
| while (i < buflen) { |
| apr_size_t j = strlen(buffer + i); |
| apr_status_t status; |
| status = apr_send(sock, buffer+i, &j); |
| if (status != APR_SUCCESS) { |
| ap_log_error(APLOG_MARK, APLOG_CRIT, status, srv, |
| "write: rfc1413: error sending request"); |
| return status; |
| } |
| else if (j > 0) { |
| i+=j; |
| } |
| } |
| |
| /* |
| * Read response from server. - the response should be newline |
| * terminated according to rfc - make sure it doesn't stomp its |
| * way out of the buffer. |
| */ |
| |
| i = 0; |
| memset(buffer, '\0', sizeof(buffer)); |
| /* |
| * Note that the strchr function below checks for \012 instead of '\n' |
| * this allows it to work on both ASCII and EBCDIC machines. |
| */ |
| while((cp = strchr(buffer, '\012')) == NULL && i < sizeof(buffer) - 1) { |
| apr_size_t j = sizeof(buffer) - 1 - i; |
| apr_status_t status; |
| status = apr_recv(sock, buffer+i, &j); |
| if (status != APR_SUCCESS) { |
| ap_log_error(APLOG_MARK, APLOG_CRIT, status, srv, |
| "read: rfc1413: error reading response"); |
| return status; |
| } |
| else if (j > 0) { |
| i+=j; |
| } |
| else if (status == APR_SUCCESS && j == 0) { |
| /* Oops... we ran out of data before finding newline */ |
| return APR_EINVAL; |
| } |
| } |
| |
| /* RFC1413_USERLEN = 512 */ |
| ap_xlate_proto_from_ascii(buffer, i); |
| if (sscanf(buffer, "%hu , %hu : USERID :%*[^:]:%512s", &rmt_port, &our_port, |
| user) != 3 || sav_rmt_port != rmt_port |
| || sav_our_port != our_port) |
| return APR_EINVAL; |
| |
| /* |
| * Strip trailing carriage return. It is part of the |
| * protocol, not part of the data. |
| */ |
| |
| if ((cp = strchr(user, '\r'))) |
| *cp = '\0'; |
| |
| conn->remote_logname = apr_pstrdup(conn->pool, user); |
| |
| return APR_SUCCESS; |
| } |
| |
| char *ap_rfc1413(conn_rec *conn, server_rec *srv) |
| { |
| apr_socket_t *sock; |
| apr_status_t rv; |
| |
| rv = rfc1413_connect(&sock, conn, srv); |
| if (rv == APR_SUCCESS) { |
| rv = rfc1413_query(sock, conn, srv); |
| apr_socket_close(sock); |
| } |
| if (rv != APR_SUCCESS) { |
| conn->remote_logname = FROM_UNKNOWN; |
| } |
| return conn->remote_logname; |
| } |