-/* intercept functions */
-
-/*********************************************************************
- *
- * Function : show_proxy_args
- *
- * Description : This "crunch"es "http:/any.thing/show-proxy-args" and
- * returns a web page describing the current status of IJB.
- *
- * Parameters :
- * 1 : http = ignored
- * 2 : csp = Current client state (buffers, headers, etc...)
- *
- * Returns : A string that contains the current status of IJB.
- *
- *********************************************************************/
-char *show_proxy_args(struct http_request *http, struct client_state *csp)
-{
- char *s = NULL;
-
-#ifdef SPLIT_PROXY_ARGS
- FILE * fp;
- char buf[BUFSIZ];
- char * p;
- const char * filename = NULL;
- const char * file_description = NULL;
- char * query_string = strrchr(http->path, '?');
- char which_file = '\0';
-
-
- if (query_string != NULL)
- {
- /* first char past the last '?' (maybe '\0')*/
- which_file = query_string[1];
- }
- switch (which_file)
- {
- case 'p':
- if (csp->actions_list)
- {
- filename = csp->actions_list->filename;
- file_description = "Actions List";
- }
- break;
- case 'f':
- if (csp->flist)
- {
- filename = csp->flist->filename;
- file_description = "Forward List";
- }
- break;
-
-#ifdef ACL_FILES
- case 'a':
- if (csp->alist)
- {
- filename = csp->alist->filename;
- file_description = "Access Control List";
- }
- break;
-#endif /* def ACL_FILES */
-
-#ifdef PCRS
- case 'r':
- if (csp->rlist)
- {
- filename = csp->rlist->filename;
- file_description = "RE Filter List";
- }
- break;
-#endif /* def PCRS */
-
-#ifdef TRUST_FILES
- case 't':
- if (csp->tlist)
- {
- filename = csp->tlist->filename;
- file_description = "Trust List";
- }
- break;
-#endif /* def TRUST_FILES */
- }
-
- if (filename)
- {
- /* Display specified file */
- /* FIXME: Add HTTP headers so this isn't cached */
- s = strsav(s,
- "HTTP/1.0 200 OK\n"
- "Server: IJ/" VERSION "\n"
- "Content-type: text/html\n"
- "Pragma: no-cache\n"
- "Last-Modified: Thu Jul 31, 1997 07:42:22 pm GMT\n"
- "Expires: Thu Jul 31, 1997 07:42:22 pm GMT\n"
- "\n"
-
- "<html>"
- "<head>"
- "<title>Internet Junkbuster Proxy Status - ");
- s = strsav(s, file_description);
- s = strsav(s,
- "</title>"
- "</head>\n"
- "<body bgcolor=\"#f8f8f0\" link=\"#000078\" alink=\"#ff0022\" vlink=\"#787878\">\n"
- "<center>\n"
- "<h1>" BANNER "\n");
- s = strsav(s, file_description);
- s = strsav(s,
- "</h1></center>\n"
- "<p><a href=\"show-proxy-args\">Back to proxy status</a></p>\n"
- "<h2>");
- s = strsav(s, file_description);
- s = strsav(s,
- "</h2>\n"
- "Contents of file "<code>");
- p = html_encode(filename);
- s = strsav(s, p);
- freez(p);
- s = strsav(s,
- "</code>":<br>\n"
- "</p>\n"
- "<pre>");
-
- if ((fp = fopen(filename, "r")) == NULL)
- {
- s = strsav(s, "</pre><h1>ERROR OPENING FILE!</h1><pre>");
- }
- else
- {
- while (fgets(buf, sizeof(buf), fp))
- {
- p = html_encode(buf);
- if (p)
- {
- s = strsav(s, p);
- freez(p);
- s = strsav(s, "<br>");
- }
- }
- fclose(fp);
- }
-
- s = strsav(s,
- "</pre>\n"
- "<br>\n"
- "<p><a href=\"show-proxy-args\">Back to proxy status</a></p>\n"
- "<br>\n"
- "<small><small><p>\n"
- "The " BANNER " Proxy - \n"
- "<a href=\"" HOME_PAGE_URL "\">" HOME_PAGE_URL "</a>\n"
- "</small></small>"
- "</body></html>\n");
- return(s);
- }
-#endif /* def SPLIT_PROXY_ARGS */
-
- s = strsav(s, csp->config->proxy_args_header);
- s = strsav(s, csp->config->proxy_args_invocation);
-#ifdef STATISTICS
- s = add_stats(s);
-#endif /* def STATISTICS */
- s = strsav(s, csp->config->proxy_args_gateways);
-
-#ifdef SPLIT_PROXY_ARGS
- s = strsav(s,
- "<h2>The following files are in use:</h2>\n"
- "<p>(Click a filename to view it)</p>\n"
- "<ul>\n");
-
- if (csp->actions_list)
- {
- s = strsav(s, "<li>Actions List: <a href=\"show-proxy-args?permit\"><code>");
- s = strsav(s, csp->actions_list->filename);
- s = strsav(s, "</code></a></li>\n");
- }
-
- if (csp->flist)
- {
- s = strsav(s, "<li>Forward List: <a href=\"show-proxy-args?forward\"><code>");
- s = strsav(s, csp->flist->filename);
- s = strsav(s, "</code></a></li>\n");
- }
-
-#ifdef ACL_FILES
- if (csp->alist)
- {
- s = strsav(s, "<li>Access Control List: <a href=\"show-proxy-args?acl\"><code>");
- s = strsav(s, csp->alist->filename);
- s = strsav(s, "</code></a></li>\n");
- }
-#endif /* def ACL_FILES */
-
-#ifdef PCRS
- if (csp->rlist)
- {
- s = strsav(s, "<li>RE Filter List: <a href=\"show-proxy-args?re\"><code>");
- s = strsav(s, csp->rlist->filename);
- s = strsav(s, "</code></a></li>\n");
- }
-#endif /* def PCRS */
-
-#ifdef TRUST_FILES
- if (csp->tlist)
- {
- s = strsav(s, "<li>Trust List: <a href=\"show-proxy-args?trust\"><code>");
- s = strsav(s, csp->tlist->filename);
- s = strsav(s, "</code></a></li>\n");
- }
-#endif /* def TRUST_FILES */
-
- s = strsav(s, "</ul>");
-
-#else /* ifndef SPLIT_PROXY_ARGS */
- if (csp->clist)
- {
- s = strsav(s, csp->clist->proxy_args);
- }
-
- if (csp->flist)
- {
- s = strsav(s, csp->flist->proxy_args);
- }
-
-#ifdef ACL_FILES
- if (csp->alist)
- {
- s = strsav(s, csp->alist->proxy_args);
- }
-#endif /* def ACL_FILES */
-
-#ifdef PCRS
- if (csp->rlist)
- {
- s = strsav(s, csp->rlist->proxy_args);
- }
-#endif /* def PCRS */
-
-#ifdef TRUST_FILES
- if (csp->tlist)
- {
- s = strsav(s, csp->tlist->proxy_args);
- }
-#endif /* def TRUST_FILES */
-
-#endif /* ndef SPLIT_PROXY_ARGS */
-
- s = strsav(s, csp->config->proxy_args_trailer);
-
- return(s);
-
-}
-
-
-static const char C_URL_INFO_HEADER[] =
- "HTTP/1.0 200 OK\n"
- "Pragma: no-cache\n"
- "Expires: Thu Jul 31, 1997 07:42:22 pm GMT\n"
- "Content-Type: text/html\n\n"
- "<html>\n"
- "<head>\n"
- "<title>Internet Junkbuster: URL Info</title>\n"
- "</head>\n"
- BODY
- "<h1><center>"
- BANNER
- "</h1></center>\n"
- "<p>Information for: <a href=\"http://%s\">http://%s</a></p>\n";
-static const char C_URL_INFO_FOOTER[] =
- "\n</p>\n"
- "</body>\n"
- "</html>\n";
-
-static const char C_URL_INFO_FORM[] =
- "HTTP/1.0 200 OK\n"
- "Pragma: no-cache\n"
- "Expires: Thu Jul 31, 1997 07:42:22 pm GMT\n"
- "Content-Type: text/html\n\n"
- "<html>\n"
- "<head>\n"
- "<title>Internet Junkbuster: URL Info</title>\n"
- "</head>\n"
- BODY
- "<h1><center>"
- BANNER
- "</h1></center>\n"
- "<form method=\"GET\" action=\"http://i.j.b/show-url-info\">\n"
- "<p>Please enter a URL, without the leading "http://":</p>"
- "<p><input type=\"text\" name=\"url\" size=\"80\">"
- "<input type=\"submit\" value=\"Info\"></p>\n"
- "</form>\n"
- "</body>\n"
- "</html>\n";
-
-
- /*********************************************************************
- *
- * Function : ijb_show_url_info
- *
- * Description : (please fill me in)
- *
- * Parameters :
- * 1 : http = http_request request for crunched URL
- * 2 : csp = Current client state (buffers, headers, etc...)
- *
- * Returns : ???FIXME
- *
- *********************************************************************/
-char *ijb_show_url_info(struct http_request *http, struct client_state *csp)
-{
- char * query_string = strchr(http->path, '?');
- char * host = NULL;
-
- if (query_string != NULL)
- {
- query_string = url_decode(query_string + 1);
- if (strncmpic(query_string, "url=", 4) == 0)
- {
- host = strdup(query_string + 4);
- }
- freez(query_string);
- }
- if (host != NULL)
- {
- char * result;
- char * path;
- char * s;
- int port = 80;
- struct file_list *fl;
- struct url_actions *b;
- struct url_spec url[1];
- struct current_action_spec action[1];
-
- init_current_action(action);
-
- result = (char *)malloc(sizeof(C_URL_INFO_HEADER) + 2 * strlen(host));
- sprintf(result, C_URL_INFO_HEADER, host, host);
-
- s = current_action_to_text(action);
- result = strsav(result, "<h3>Defaults:</h3>\n<p><b>{");
- result = strsav(result, s);
- result = strsav(result, " }</b></p>\n<h3>Patterns affecting the URL:</h3>\n<p>\n");
- freez(s);
-
- s = strchr(host, '/');
- if (s != NULL)
- {
- path = strdup(s);
- *s = '\0';
- }
- else
- {
- path = strdup("");
- }
- s = strchr(host, ':');
- if (s != NULL)
- {
- *s++ = '\0';
- port = atoi(s);
- }
-
- if (((fl = csp->actions_list) == NULL) || ((b = fl->f) == NULL))
- {
- freez(host);
- freez(path);
- result = strsav(result, C_URL_INFO_FOOTER);
- return result;
- }
-
- *url = dsplit(host);
-
- /* if splitting the domain fails, punt */
- if (url->dbuf == NULL)
- {
- freez(host);
- freez(path);
- result = strsav(result, C_URL_INFO_FOOTER);
- return result;
- }
-
- for (b = b->next; NULL != b; b = b->next)
- {
- if ((b->url->port == 0) || (b->url->port == port))
- {
- if ((b->url->domain[0] == '\0') || (domaincmp(b->url, url) == 0))
- {
- if ((b->url->path == NULL) ||
-#ifdef REGEX
- (regexec(b->url->preg, path, 0, NULL, 0) == 0)
-#else
- (strncmp(b->url->path, path, b->url->pathlen) == 0)
-#endif
- )
- {
- s = actions_to_text(b->action);
- result = strsav(result, "<b>{");
- result = strsav(result, s);
- result = strsav(result, " }</b><br>\n<code>");
- result = strsav(result, b->url->spec);
- result = strsav(result, "</code><br>\n<br>\n");
- freez(s);
-
- merge_current_action(action, b->action);
- }
- }
- }
- }
-
- freez(url->dbuf);
- freez(url->dvec);
-
- freez(host);
- freez(path);
-
- s = current_action_to_text(action);
- result = strsav(result, "</p>\n<h2>Final Results:</h2>\n<p><b>{");
- result = strsav(result, s);
- result = strsav(result, " }</b><br>\n<br>\n");
- freez(s);
-
- free_current_action(action);
-
- result = strsav(result, C_URL_INFO_FOOTER);
- return result;
- }
- else
- {
- return strdup(C_URL_INFO_FORM);
- }
-}
-
-
-/*********************************************************************
- *
- * Function : ijb_send_banner
- *
- * Description : This "crunch"es "http://i.j.b/ijb-send-banner and
- * sends the image.
- *
- * Parameters :
- * 1 : http = http_request request for crunched URL
- * 2 : csp = Current client state (buffers, headers, etc...)
- *
- * Returns : NULL, indicating that it has already sent the data.
- *
- *********************************************************************/
-char *ijb_send_banner(struct http_request *http, struct client_state *csp)
-{
- write_socket(csp->cfd, JBGIF, sizeof(JBGIF)-1);
-
- return(NULL);
-}
-
-#ifdef TRUST_FILES
-/*********************************************************************
- *
- * Function : ij_untrusted_url
- *
- * Description : This "crunch"es "http:/any.thing/ij-untrusted-url" and
- * returns a web page describing why it was untrusted.
- *
- * Parameters :
- * 1 : http = http_request request for crunched URL
- * 2 : csp = Current client state (buffers, headers, etc...)
- *
- * Returns : A string that contains why this was untrusted.
- *
- *********************************************************************/
-char *ij_untrusted_url(struct http_request *http, struct client_state *csp)
-{
- int n;
- char *hostport, *path, *refer, *p, *v[9];
- char buf[BUFSIZ];
- struct url_spec **tl, *t;
-
-
- static const char format[] =
- "HTTP/1.0 200 OK\r\n"
- "Pragma: no-cache\n"
- "Last-Modified: Thu Jul 31, 1997 07:42:22 pm GMT\n"
- "Expires: Thu Jul 31, 1997 07:42:22 pm GMT\n"
- "Content-Type: text/html\n\n"
- "<html>\n"
- "<head>\n"
- "<title>Internet Junkbuster: Request for untrusted URL</title>\n"
- "</head>\n"
- BODY
- "<center><h1>"
- BANNER
- "</h1></center>"
- "The " BANNER " Proxy "
- "<A href=\"" HOME_PAGE_URL "\">"
- "(" HOME_PAGE_URL ") </A>"
- "intercepted the request for %s%s\n"
- "because the URL is not trusted.\n"
- "<br><br>\n";
-
- if ((n = ssplit(http->path, "?+", v, SZ(v), 0, 0)) == 4)
- {
- hostport = url_decode(v[1]);
- path = url_decode(v[2]);
- refer = url_decode(v[3]);
- }
- else
- {
- hostport = strdup("undefined_host");
- path = strdup("/undefined_path");
- refer = strdup("undefined");
- }
-
- n = sizeof(format);
- n += strlen(hostport);
- n += strlen(path );
-
- if ((p = (char *)malloc(n)))
- {
- sprintf(p, format, hostport, path);
- }
-
- strsav(p, "The referrer in this request was <strong>");
- strsav(p, refer);
- strsav(p, "</strong><br>\n");
-
- freez(hostport);
- freez(path );
- freez(refer );
-
- p = strsav(p, "<h3>The following referrers are trusted</h3>\n");
-
- for (tl = csp->config->trust_list; (t = *tl) ; tl++)
- {
- sprintf(buf, "%s<br>\n", t->spec);
- p = strsav(p, buf);
- }
-
- if (csp->config->trust_info->next)
- {
- struct list *l;
-
- strcpy(buf,
- "<p>"
- "You can learn more about what this means "
- "and what you may be able to do about it by "
- "reading the following documents:<br>\n"
- "<ol>\n"
- );
-
- p = strsav(p, buf);
-
- for (l = csp->config->trust_info->next; l ; l = l->next)
- {
- sprintf(buf,
- "<li> <a href=%s>%s</a><br>\n",
- l->str, l->str);
- p = strsav(p, buf);
- }
-
- p = strsav(p, "</ol>\n");
- }
-
- p = strsav(p, "</body>\n" "</html>\n");
-
- return(p);
-
-}
-#endif /* def TRUST_FILES */
-
-
-#ifdef STATISTICS
-/*********************************************************************
- *
- * Function : add_stats
- *
- * Description : Statistics function of JB. Called by `show_proxy_args'.
- *
- * Parameters :
- * 1 : s = string that holds the proxy args description page
- *
- * Returns : A pointer to the descriptive status web page.
- *
- *********************************************************************/
-char *add_stats(char *s)
-{
- /*
- * Output details of the number of requests rejected and
- * accepted. This is switchable in the junkbuster config.
- * Does nothing if this option is not enabled.
- */
-
- float perc_rej; /* Percentage of http requests rejected */
- char out_str[81];
- int local_urls_read = urls_read;
- int local_urls_rejected = urls_rejected;
-
- /*
- * Need to alter the stats not to include the fetch of this
- * page.
- *
- * Can't do following thread safely! doh!
- *
- * urls_read--;
- * urls_rejected--; * This will be incremented subsequently *
- */
-
- s = strsav(s,"<h2>Statistics for this " BANNER ":</h2>\n");
-
- if (local_urls_read == 0)
- {
-
- s = strsav(s,"No activity so far!\n");
-
- }
- else
- {
-
- perc_rej = (float)local_urls_rejected * 100.0F /
- (float)local_urls_read;
-
- sprintf(out_str,
- "%d requests received, %d filtered "
- "(%6.2f %%).",
- local_urls_read,
- local_urls_rejected, perc_rej);
-
- s = strsav(s,out_str);
- }
-
- return(s);
-}
-#endif /* def STATISTICS */
-