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- /* ====================================================================
- * Copyright (c) 1995-1999 The Apache Group. 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. All advertising materials mentioning features or use of this
- * software must display the following acknowledgment:
- * "This product includes software developed by the Apache Group
- * for use in the Apache HTTP server project (http://www.apache.org/)."
- *
- * 4. The names "Apache Server" and "Apache Group" 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 names without prior written
- * permission of the Apache Group.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by the Apache Group
- * for use in the Apache HTTP server project (http://www.apache.org/)."
- *
- * THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``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 GROUP 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 Group and was originally based
- * on public domain software written at the National Center for
- * Supercomputing Applications, University of Illinois, Urbana-Champaign.
- * For more information on the Apache Group and the Apache HTTP server
- * project, please see <http://www.apache.org/>.
- *
- */
-
-
- #include "httpd.h"
- #include "http_config.h"
- #include "http_log.h"
-
- module referer_log_module;
-
- static int xfer_flags = (O_WRONLY | O_APPEND | O_CREAT);
-
- #ifdef OS2
- /* OS/2 lacks support for users and groups */
- static mode_t xfer_mode = (S_IREAD | S_IWRITE);
- #else
- static mode_t xfer_mode = (S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
- #endif
-
- typedef struct {
- char *fname;
- int referer_fd;
- array_header *referer_ignore_list;
- } referer_log_state;
-
- static void *make_referer_log_state(pool *p, server_rec *s)
- {
- referer_log_state *cls =
- (referer_log_state *) ap_palloc(p, sizeof(referer_log_state));
-
- cls->fname = "";
- cls->referer_fd = -1;
- cls->referer_ignore_list = ap_make_array(p, 1, sizeof(char *));
- return (void *) cls;
- }
-
- static const char *set_referer_log(cmd_parms *parms, void *dummy, char *arg)
- {
- referer_log_state *cls = ap_get_module_config(parms->server->module_config,
- &referer_log_module);
-
- cls->fname = arg;
- return NULL;
- }
-
- static const char *add_referer_ignore(cmd_parms *parms, void *dummy, char *arg)
- {
- char **addme;
- referer_log_state *cls = ap_get_module_config(parms->server->module_config,
- &referer_log_module);
-
- addme = ap_push_array(cls->referer_ignore_list);
- ap_str_tolower(arg);
- *addme = arg;
- return NULL;
- }
-
- static const command_rec referer_log_cmds[] =
- {
- {"RefererLog", set_referer_log, NULL, RSRC_CONF, TAKE1,
- "the filename of the referer log"},
- {"RefererIgnore", add_referer_ignore, NULL, RSRC_CONF, ITERATE,
- "referer hostnames to ignore"},
- {NULL}
- };
-
- static void open_referer_log(server_rec *s, pool *p)
- {
- referer_log_state *cls = ap_get_module_config(s->module_config,
- &referer_log_module);
-
- char *fname = ap_server_root_relative(p, cls->fname);
-
- if (cls->referer_fd > 0)
- return; /* virtual log shared w/main server */
-
- if (*cls->fname == '|') {
- piped_log *pl;
-
- pl = ap_open_piped_log(p, cls->fname + 1);
- if (pl == NULL) {
- ap_log_error(APLOG_MARK, APLOG_ERR, s,
- "couldn't spawn referer log pipe");
- exit(1);
- }
-
- cls->referer_fd = ap_piped_log_write_fd(pl);
- }
- else if (*cls->fname != '\0') {
- if ((cls->referer_fd = ap_popenf(p, fname, xfer_flags, xfer_mode)) < 0) {
- ap_log_error(APLOG_MARK, APLOG_ERR, s,
- "could not open referer log file %s.", fname);
- exit(1);
- }
- }
- }
-
- static void init_referer_log(server_rec *s, pool *p)
- {
- for (; s; s = s->next)
- open_referer_log(s, p);
- }
-
- static int referer_log_transaction(request_rec *orig)
- {
- char **ptrptr, **ptrptr2;
- referer_log_state *cls = ap_get_module_config(orig->server->module_config,
- &referer_log_module);
-
- char *str;
- const char *referer;
- char *referertest;
- request_rec *r;
-
- if (cls->referer_fd < 0)
- return OK;
-
- for (r = orig; r->next; r = r->next)
- continue;
- if (*cls->fname == '\0') /* Don't log referer */
- return DECLINED;
-
- referer = ap_table_get(orig->headers_in, "Referer");
- if (referer != NULL) {
-
- referertest = ap_pstrdup(orig->pool, referer);
- ap_str_tolower(referertest);
- /* The following is an upsetting mess of pointers, I'm sorry
- Anyone with the motiviation and/or the time should feel free
- to make this cleaner... */
-
- ptrptr2 = (char **) (cls->referer_ignore_list->elts +
- (cls->referer_ignore_list->nelts *
- cls->referer_ignore_list->elt_size));
-
- /* Go through each element of the ignore list and compare it to the
- referer_host. If we get a match, return without logging */
-
- for (ptrptr = (char **) cls->referer_ignore_list->elts;
- ptrptr < ptrptr2;
- ptrptr = (char **) ((char *) ptrptr + cls->referer_ignore_list->elt_size)) {
- if (strstr(referertest, *ptrptr))
- return OK;
- }
-
-
- str = ap_pstrcat(orig->pool, referer, " -> ", r->uri, "\n", NULL);
- write(cls->referer_fd, str, strlen(str));
- }
-
- return OK;
- }
-
- module referer_log_module =
- {
- STANDARD_MODULE_STUFF,
- init_referer_log, /* initializer */
- NULL, /* create per-dir config */
- NULL, /* merge per-dir config */
- make_referer_log_state, /* server config */
- NULL, /* merge server config */
- referer_log_cmds, /* command table */
- NULL, /* handlers */
- NULL, /* filename translation */
- NULL, /* check_user_id */
- NULL, /* check auth */
- NULL, /* check access */
- NULL, /* type_checker */
- NULL, /* fixups */
- referer_log_transaction, /* logger */
- NULL, /* header parser */
- NULL, /* child_init */
- NULL, /* child_exit */
- NULL /* post read-request */
- };
-