2014-01-25 04:21:40 -05:00
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/*
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2015-12-29 02:48:09 -05:00
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* Gophernicus - Copyright (c) 2009-2016 Kim Holviala <kim@holviala.com>
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2014-01-25 04:21:40 -05:00
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "gophernicus.h"
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/*
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* Print gopher menu line
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*/
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void info(state *st, char *str, char type)
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{
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char buf[BUFSIZE];
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char selector[16];
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/* Convert string to output charset */
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if (st->opt_iconv) sstrniconv(st->out_charset, buf, str);
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else sstrlcpy(buf, str);
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/* Handle gopher title resources */
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strclear(selector);
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if (type == TYPE_TITLE) {
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sstrlcpy(selector, "TITLE");
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type = TYPE_INFO;
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}
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/* Output info line */
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strcut(buf, st->out_width);
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printf("%c%s\t%s\t%s" CRLF,
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type, buf, selector, DUMMY_HOST);
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}
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/*
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* Print footer
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*/
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void footer(state *st)
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{
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char line[BUFSIZE];
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char buf[BUFSIZE];
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char msg[BUFSIZE];
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if (!st->opt_footer) {
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#ifndef ENABLE_STRICT_RFC1436
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if (st->req_filetype == TYPE_MENU || st->req_filetype == TYPE_QUERY)
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#endif
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printf("." CRLF);
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return;
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}
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/* Create horizontal line */
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strrepeat(line, '_', st->out_width);
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/* Create right-aligned footer message */
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snprintf(buf, sizeof(buf), FOOTER_FORMAT, st->server_platform);
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snprintf(msg, sizeof(msg), "%*s", st->out_width - 1, buf);
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/* Menu footer? */
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if (st->req_filetype == TYPE_MENU || st->req_filetype == TYPE_QUERY) {
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info(st, line, TYPE_INFO);
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info(st, msg, TYPE_INFO);
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printf("." CRLF);
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}
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/* Plain text footer */
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else {
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printf("%s" CRLF, line);
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printf("%s" CRLF, msg);
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#ifdef ENABLE_STRICT_RFC1436
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printf("." CRLF);
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#endif
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}
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}
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/*
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* Print error message & exit
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*/
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void die(state *st, char *message, char *description)
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{
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int en = errno;
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static const char error_gif[] = ERROR_GIF;
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/* Handle NULL description */
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if (description == NULL) description = strerror(en);
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/* Log the error */
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if (st->opt_syslog) {
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syslog(LOG_ERR, "error \"%s\" for request \"%s\" from %s",
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description, st->req_selector, st->req_remote_addr);
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}
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log_combined(st, HTTP_404);
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/* Handle menu errors */
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if (st->req_filetype == TYPE_MENU || st->req_filetype == TYPE_QUERY) {
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printf("3" ERROR_PREFIX "%s\tTITLE\t" DUMMY_HOST CRLF, message);
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footer(st);
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}
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/* Handle image errors */
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else if (st->req_filetype == TYPE_GIF || st->req_filetype == TYPE_IMAGE) {
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fwrite(error_gif, sizeof(error_gif), 1, stdout);
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}
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/* Handle HTML errors */
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else if (st->req_filetype == TYPE_HTML) {
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printf("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 3.2 Final//EN\">\n"
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"<HTML>\n<HEAD>\n"
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" <META HTTP-EQUIV=\"Content-Type\" CONTENT=\"text/html;charset=iso-8859-1\">\n"
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" <TITLE>" ERROR_PREFIX "%1$s</TITLE>\n"
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"</HEAD>\n<BODY>\n"
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"<STRONG>" ERROR_PREFIX "%1$s</STRONG>\n"
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"<PRE>\n", message);
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footer(st);
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printf("</PRE>\n</BODY>\n</HTML>\n");
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}
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/* Use plain text error for other filetypes */
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else {
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printf(ERROR_PREFIX "%s" CRLF, message);
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footer(st);
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}
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/* Quit */
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exit(EXIT_FAILURE);
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}
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/*
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* Apache-compatible combined logging
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*/
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void log_combined(state *st, int status)
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{
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FILE *fp;
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struct tm *ltime;
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char timestr[64];
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time_t now;
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/* Try to open the logfile for appending */
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if (!*st->log_file) return;
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if ((fp = fopen(st->log_file , "a")) == NULL) return;
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/* Format time */
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now = time(NULL);
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ltime = localtime(&now);
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strftime(timestr, sizeof(timestr), HTTP_DATE, ltime);
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/* Generate log entry */
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fprintf(fp, "%s %s:%i - [%s] \"GET %c%s HTTP/1.0\" %i %li \"%s\" \"" HTTP_USERAGENT "\"\n",
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st->req_remote_addr,
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st->server_host,
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st->server_port,
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timestr,
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st->req_filetype,
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st->req_selector,
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status,
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(long) st->req_filesize,
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st->req_referrer);
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fclose(fp);
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}
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/*
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* Convert gopher selector to an absolute path
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*/
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void selector_to_path(state *st)
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{
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DIR *dp;
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struct dirent *dir;
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struct stat file;
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#ifdef HAVE_PASSWD
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struct passwd *pwd;
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char *path = EMPTY;
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char *c;
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#endif
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char buf[BUFSIZE];
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int i;
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/* Handle selector rewriting */
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for (i = 0; i < st->rewrite_count; i++) {
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/* Match found? */
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if (strstr(st->req_selector, st->rewrite[i].match) == st->req_selector) {
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/* Replace match with a new string */
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snprintf(buf, sizeof(buf), "%s%s",
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st->rewrite[i].replace,
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st->req_selector + strlen(st->rewrite[i].match));
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if (st->debug) {
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syslog(LOG_INFO, "rewriting selector \"%s\" -> \"%s\"",
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st->req_selector, buf);
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}
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sstrlcpy(st->req_selector, buf);
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}
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}
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#ifdef HAVE_PASSWD
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/* Virtual userdir (~user -> /home/user/public_gopher)? */
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if (*(st->user_dir) && sstrncmp(st->req_selector, "/~") == MATCH) {
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/* Parse userdir login name & path */;
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sstrlcpy(buf, st->req_selector + 2);
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if ((c = strchr(buf, '/'))) {
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*c = '\0';
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path = c + 1;
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}
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/* Check user validity */
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if ((pwd = getpwnam(buf)) == NULL)
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die(st, ERR_NOTFOUND, "User not found");
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if (pwd->pw_uid < PASSWD_MIN_UID)
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die(st, ERR_NOTFOUND, "User found but UID too low");
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/* Generate absolute path to users own gopher root */
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snprintf(st->req_realpath, sizeof(st->req_realpath),
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"%s/%s/%s", pwd->pw_dir, st->user_dir, path);
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/* Check ~public_gopher access rights */
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if (stat(st->req_realpath, &file) == ERROR)
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die(st, ERR_NOTFOUND, NULL);
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if ((file.st_mode & S_IROTH) == 0)
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die(st, ERR_ACCESS, "~/public_gopher not world-readable");
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if (file.st_uid != pwd->pw_uid)
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die(st, ERR_ACCESS, "~/ and ~/public_gopher owned by different users");
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/* Userdirs always come from the default vhost */
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if (st->opt_vhost)
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sstrlcpy(st->server_host, st->server_host_default);
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return;
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}
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#endif
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/* Virtual hosting */
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if (st->opt_vhost) {
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/* Try looking for the selector from the current vhost */
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snprintf(st->req_realpath, sizeof(st->req_realpath), "%s/%s%s",
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st->server_root, st->server_host, st->req_selector);
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if (stat(st->req_realpath, &file) == OK) return;
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/* Loop through all vhosts looking for the selector */
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if ((dp = opendir(st->server_root)) == NULL) die(st, ERR_NOTFOUND, NULL);
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while ((dir = readdir(dp))) {
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/* Skip .hidden dirs and . & .. */
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if (dir->d_name[0] == '.') continue;
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/* Special case - skip lost+found (don't ask) */
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if (sstrncmp(dir->d_name, "lost+found") == MATCH) continue;
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/* Generate path to the found vhost */
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snprintf(st->req_realpath, sizeof(st->req_realpath), "%s/%s%s",
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st->server_root, dir->d_name, st->req_selector);
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/* Did we find the selector under this vhost? */
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if (stat(st->req_realpath, &file) == OK) {
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/* Virtual host found - update state & return */
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sstrlcpy(st->server_host, dir->d_name);
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return;
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}
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}
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closedir(dp);
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}
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/* Handle normal selectors */
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snprintf(st->req_realpath, sizeof(st->req_realpath),
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"%s%s", st->server_root, st->req_selector);
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}
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/*
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* Get local IP address
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*/
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char *get_local_address(void)
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{
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#ifdef HAVE_IPv4
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struct sockaddr_in addr;
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socklen_t addrsize = sizeof(addr);
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#endif
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#ifdef HAVE_IPv6
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struct sockaddr_in6 addr6;
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socklen_t addr6size = sizeof(addr6);
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static char address[INET6_ADDRSTRLEN];
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#endif
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char *c;
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/* Try IPv4 first */
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#ifdef HAVE_IPv4
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if (getsockname(0, (struct sockaddr *) &addr, &addrsize) == OK) {
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c = inet_ntoa(addr.sin_addr);
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if (strlen(c) > 0 && *c != '0') return c;
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}
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#endif
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/* IPv4 didn't work - try IPv6 */
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#ifdef HAVE_IPv6
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if (getsockname(0, (struct sockaddr *) &addr6, &addr6size) == OK) {
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if (inet_ntop(AF_INET6, &addr6.sin6_addr, address, sizeof(address))) {
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/* Strip ::ffff: IPv4-in-IPv6 prefix */
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if (sstrncmp(address, "::ffff:") == MATCH) return (address + 7);
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else return address;
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}
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}
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#endif
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/* Nothing works... I'm out of ideas */
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2016-01-01 03:12:19 -05:00
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return UNKNOWN_ADDR;
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2014-01-25 04:21:40 -05:00
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}
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/*
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* Get remote peer IP address
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*/
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char *get_peer_address(void)
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{
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#ifdef HAVE_IPv4
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struct sockaddr_in addr;
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socklen_t addrsize = sizeof(addr);
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#endif
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#ifdef HAVE_IPv6
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struct sockaddr_in6 addr6;
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socklen_t addr6size = sizeof(addr6);
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static char address[INET6_ADDRSTRLEN];
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#endif
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char *c;
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/* Are we a CGI script? */
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if ((c = getenv("REMOTE_ADDR"))) return c;
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/* if ((c = getenv("REMOTE_HOST"))) return c; */
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/* Try IPv4 first */
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#ifdef HAVE_IPv4
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if (getpeername(0, (struct sockaddr *) &addr, &addrsize) == OK) {
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c = inet_ntoa(addr.sin_addr);
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if (strlen(c) > 0 && *c != '0') return c;
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}
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#endif
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/* IPv4 didn't work - try IPv6 */
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#ifdef HAVE_IPv6
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if (getpeername(0, (struct sockaddr *) &addr6, &addr6size) == OK) {
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if (inet_ntop(AF_INET6, &addr6.sin6_addr, address, sizeof(address))) {
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/* Strip ::ffff: IPv4-in-IPv6 prefix */
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if (sstrncmp(address, "::ffff:") == MATCH) return (address + 7);
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else return address;
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|
|
}
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/* Nothing works... I'm out of ideas */
|
2016-01-01 03:12:19 -05:00
|
|
|
return UNKNOWN_ADDR;
|
2014-01-25 04:21:40 -05:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Initialize state struct to default/empty values
|
|
|
|
*/
|
|
|
|
void init_state(state *st)
|
|
|
|
{
|
|
|
|
static const char *filetypes[] = { FILETYPES };
|
|
|
|
char buf[BUFSIZE];
|
|
|
|
char *c;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
/* Request */
|
|
|
|
strclear(st->req_selector);
|
|
|
|
strclear(st->req_realpath);
|
|
|
|
strclear(st->req_query_string);
|
|
|
|
strclear(st->req_referrer);
|
|
|
|
sstrlcpy(st->req_local_addr, get_local_address());
|
|
|
|
sstrlcpy(st->req_remote_addr, get_peer_address());
|
|
|
|
/* strclear(st->req_remote_host); */
|
|
|
|
st->req_filetype = DEFAULT_TYPE;
|
|
|
|
st->req_protocol = PROTO_GOPHER;
|
|
|
|
st->req_filesize = 0;
|
|
|
|
|
|
|
|
/* Output */
|
|
|
|
st->out_width = DEFAULT_WIDTH;
|
|
|
|
st->out_charset = DEFAULT_CHARSET;
|
|
|
|
|
|
|
|
/* Settings */
|
|
|
|
sstrlcpy(st->server_root, DEFAULT_ROOT);
|
|
|
|
sstrlcpy(st->server_host_default, DEFAULT_HOST);
|
|
|
|
|
|
|
|
if ((c = getenv("HOSTNAME")))
|
|
|
|
sstrlcpy(st->server_host, c);
|
|
|
|
else if ((gethostname(buf, sizeof(buf))) != ERROR)
|
|
|
|
sstrlcpy(st->server_host, buf);
|
|
|
|
|
|
|
|
st->server_port = DEFAULT_PORT;
|
|
|
|
|
|
|
|
st->default_filetype = DEFAULT_TYPE;
|
|
|
|
sstrlcpy(st->map_file, DEFAULT_MAP);
|
|
|
|
sstrlcpy(st->tag_file, DEFAULT_TAG);
|
|
|
|
sstrlcpy(st->cgi_file, DEFAULT_CGI);
|
|
|
|
sstrlcpy(st->user_dir, DEFAULT_USERDIR);
|
|
|
|
strclear(st->log_file);
|
|
|
|
|
|
|
|
st->hidden_count = 0;
|
|
|
|
st->filetype_count = 0;
|
|
|
|
strclear(st->filter_dir);
|
|
|
|
st->rewrite_count = 0;
|
|
|
|
|
|
|
|
strclear(st->server_description);
|
|
|
|
strclear(st->server_location);
|
|
|
|
strclear(st->server_platform);
|
|
|
|
strclear(st->server_admin);
|
|
|
|
|
|
|
|
/* Session */
|
|
|
|
st->session_timeout = DEFAULT_SESSION_TIMEOUT;
|
|
|
|
st->session_max_kbytes = DEFAULT_SESSION_MAX_KBYTES;
|
|
|
|
st->session_max_hits = DEFAULT_SESSION_MAX_HITS;
|
|
|
|
|
|
|
|
/* Feature options */
|
|
|
|
st->opt_vhost = TRUE;
|
|
|
|
st->opt_parent = TRUE;
|
|
|
|
st->opt_header = TRUE;
|
|
|
|
st->opt_footer = TRUE;
|
|
|
|
st->opt_date = TRUE;
|
|
|
|
st->opt_syslog = TRUE;
|
|
|
|
st->opt_magic = TRUE;
|
|
|
|
st->opt_iconv = TRUE;
|
|
|
|
st->opt_query = TRUE;
|
|
|
|
st->opt_caps = TRUE;
|
|
|
|
st->opt_shm = TRUE;
|
|
|
|
st->opt_root = TRUE;
|
|
|
|
st->debug = FALSE;
|
|
|
|
|
|
|
|
/* Load default suffix -> filetype mappings */
|
|
|
|
for (i = 0; filetypes[i]; i += 2) {
|
|
|
|
if (st->filetype_count < MAX_FILETYPES) {
|
|
|
|
sstrlcpy(st->filetype[st->filetype_count].suffix, filetypes[i]);
|
|
|
|
st->filetype[st->filetype_count].type = *filetypes[i + 1];
|
|
|
|
st->filetype_count++;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Main
|
|
|
|
*/
|
|
|
|
int main(int argc, char *argv[])
|
|
|
|
{
|
|
|
|
struct stat file;
|
|
|
|
state st;
|
|
|
|
char self[64];
|
|
|
|
char selector[BUFSIZE];
|
|
|
|
char buf[BUFSIZE];
|
|
|
|
char *dest;
|
|
|
|
char *c;
|
|
|
|
#ifdef HAVE_SHMEM
|
|
|
|
struct shmid_ds shm_ds;
|
|
|
|
shm_state *shm;
|
|
|
|
int shmid;
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/* Get the name of this binary */
|
|
|
|
if ((c = strrchr(argv[0], '/'))) sstrlcpy(self, c + 1);
|
|
|
|
else sstrlcpy(self, argv[0]);
|
|
|
|
|
|
|
|
/* Initialize state */
|
|
|
|
#ifdef HAVE_LOCALES
|
|
|
|
setlocale(LC_TIME, DATE_LOCALE);
|
|
|
|
#endif
|
|
|
|
init_state(&st);
|
2014-12-19 07:21:34 -05:00
|
|
|
srand(time(NULL) / (getpid() + getppid()));
|
2014-01-25 04:21:40 -05:00
|
|
|
|
|
|
|
/* Handle command line arguments */
|
|
|
|
parse_args(&st, argc, argv);
|
|
|
|
|
|
|
|
/* Open syslog() */
|
|
|
|
if (st.opt_syslog) openlog(self, LOG_PID, LOG_DAEMON);
|
|
|
|
|
2016-01-01 03:12:19 -05:00
|
|
|
/* Check if TCP wrappers have something to say about this connection */
|
|
|
|
#ifdef HAVE_LIBWRAP
|
|
|
|
if (sstrncmp(st.req_remote_addr, UNKNOWN_ADDR) != MATCH &&
|
|
|
|
hosts_ctl(self, STRING_UNKNOWN, st.req_remote_addr, STRING_UNKNOWN) == WRAP_DENIED)
|
|
|
|
die(&st, ERR_ACCESS, "Refused connection");
|
|
|
|
#endif
|
|
|
|
|
2014-01-25 04:21:40 -05:00
|
|
|
/* Make sure the computer is turned on */
|
|
|
|
#ifdef __HAIKU__
|
|
|
|
if (is_computer_on() != TRUE)
|
|
|
|
die(&st, ERR_ACCESS, "Please turn on the computer first");
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/* Refuse to run as root */
|
|
|
|
#ifdef HAVE_PASSWD
|
|
|
|
if (st.opt_root && getuid() == 0)
|
2015-12-29 02:57:43 -05:00
|
|
|
die(&st, ERR_ACCESS, "Cowardly refusing to run as root");
|
2014-01-25 04:21:40 -05:00
|
|
|
#endif
|
|
|
|
|
|
|
|
/* Try to get shared memory */
|
|
|
|
#ifdef HAVE_SHMEM
|
|
|
|
if ((shmid = shmget(SHM_KEY, sizeof(shm_state), IPC_CREAT | SHM_MODE)) == ERROR) {
|
|
|
|
|
|
|
|
/* Getting memory failed -> delete the old allocation */
|
|
|
|
shmctl(shmid, IPC_RMID, &shm_ds);
|
|
|
|
shm = NULL;
|
|
|
|
}
|
|
|
|
else {
|
|
|
|
/* Map shared memory */
|
|
|
|
if ((shm = (shm_state *) shmat(shmid, (void *) 0, 0)) == (void *) ERROR)
|
|
|
|
shm = NULL;
|
|
|
|
|
|
|
|
/* Initialize mapped shared memory */
|
|
|
|
if (shm && shm->start_time == 0) {
|
|
|
|
shm->start_time = time(NULL);
|
|
|
|
|
|
|
|
/* Keep server platform & description in shm */
|
|
|
|
platform(&st);
|
|
|
|
sstrlcpy(shm->server_platform, st.server_platform);
|
|
|
|
sstrlcpy(shm->server_description, st.server_description);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* For debugging shared memory issues */
|
|
|
|
if (!st.opt_shm) shm = NULL;
|
|
|
|
|
|
|
|
/* Get server platform and description */
|
|
|
|
if (shm) {
|
|
|
|
sstrlcpy(st.server_platform, shm->server_platform);
|
|
|
|
|
|
|
|
if (!*st.server_description)
|
|
|
|
sstrlcpy(st.server_description, shm->server_description);
|
|
|
|
}
|
|
|
|
else
|
|
|
|
#endif
|
|
|
|
platform(&st);
|
|
|
|
|
2014-01-25 04:45:30 -05:00
|
|
|
/* Read selector */
|
2014-01-25 04:21:40 -05:00
|
|
|
if (fgets(selector, sizeof(selector) - 1, stdin) == NULL)
|
|
|
|
selector[0] = '\0';
|
|
|
|
|
2014-01-25 04:45:30 -05:00
|
|
|
/* Remove trailing CRLF */
|
2014-01-25 04:21:40 -05:00
|
|
|
chomp(selector);
|
|
|
|
|
|
|
|
if (st.debug) syslog(LOG_INFO, "client sent us \"%s\"", selector);
|
|
|
|
|
|
|
|
/* Handle hURL: redirect page */
|
|
|
|
if (sstrncmp(selector, "URL:") == MATCH) {
|
|
|
|
st.req_filetype = TYPE_HTML;
|
|
|
|
sstrlcpy(st.req_selector, selector);
|
|
|
|
url_redirect(&st);
|
|
|
|
return OK;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Handle gopher+ root requests (UMN gopher client is seriously borken) */
|
|
|
|
if (sstrncmp(selector, "\t$") == MATCH) {
|
|
|
|
printf("+-1" CRLF);
|
|
|
|
printf("+INFO: 1Main menu\t\t%s\t%i" CRLF,
|
|
|
|
st.server_host,
|
|
|
|
st.server_port);
|
|
|
|
printf("+VIEWS:" CRLF " application/gopher+-menu: <512b>" CRLF);
|
|
|
|
printf("." CRLF);
|
|
|
|
|
|
|
|
if (st.debug) syslog(LOG_INFO, "got a request for gopher+ root menu");
|
|
|
|
return OK;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Convert HTTP request to gopher (respond using headerless HTTP/0.9) */
|
|
|
|
if (sstrncmp(selector, "GET ") == MATCH ||
|
|
|
|
sstrncmp(selector, "POST ") == MATCH ) {
|
|
|
|
|
|
|
|
if ((c = strchr(selector, ' '))) sstrlcpy(selector, c + 1);
|
|
|
|
if ((c = strchr(selector, ' '))) *c = '\0';
|
|
|
|
|
|
|
|
st.req_protocol = PROTO_HTTP;
|
|
|
|
|
|
|
|
if (st.debug) syslog(LOG_INFO, "got HTTP request for \"%s\"", selector);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Save default server_host & fetch session data (including new server_host) */
|
|
|
|
sstrlcpy(st.server_host_default, st.server_host);
|
|
|
|
#ifdef HAVE_SHMEM
|
|
|
|
if (shm) get_shm_session(&st, shm);
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/* Loop through the selector, fix it & separate query_string */
|
|
|
|
dest = st.req_selector;
|
|
|
|
if (selector[0] != '/') *dest++ = '/';
|
|
|
|
|
|
|
|
for (c = selector; *c;) {
|
|
|
|
|
|
|
|
/* Skip duplicate slashes and /./ */
|
|
|
|
while (*c == '/' && *(c + 1) == '/') c++;
|
|
|
|
if (*c == '/' && *(c + 1) == '.' && *(c + 2) == '/') c += 2;
|
|
|
|
|
|
|
|
/* Start of a query string (either type 7 or HTTP-style)? */
|
|
|
|
if (*c == '\t' || (st.opt_query && *c == '?')) {
|
|
|
|
sstrlcpy(st.req_query_string, c + 1);
|
|
|
|
if ((c = strchr(st.req_query_string, '\t'))) *c = '\0';
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Start of virtual host hint? */
|
|
|
|
if (*c == ';') {
|
|
|
|
if (st.opt_vhost) sstrlcpy(st.server_host, c + 1);
|
|
|
|
|
|
|
|
/* Skip vhost on selector */
|
|
|
|
while (*c && *c != '\t') c++;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Copy valid char */
|
|
|
|
*dest++ = *c++;
|
|
|
|
}
|
|
|
|
*dest = '\0';
|
|
|
|
|
2014-01-25 04:45:30 -05:00
|
|
|
/* Remove encodings from selector */
|
|
|
|
strndecode(st.req_selector, st.req_selector, sizeof(st.req_selector));
|
|
|
|
|
2014-01-25 04:21:40 -05:00
|
|
|
/* Deny requests for Slashdot and /../ hackers */
|
|
|
|
if (strstr(st.req_selector, "/."))
|
|
|
|
die(&st, ERR_ACCESS, "Refusing to serve out dotfiles");
|
|
|
|
|
|
|
|
/* Handle /server-status requests */
|
|
|
|
#ifdef HAVE_SHMEM
|
|
|
|
if (sstrncmp(st.req_selector, SERVER_STATUS) == MATCH) {
|
|
|
|
if (shm) server_status(&st, shm, shmid);
|
|
|
|
return OK;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/* Remove possible extra cruft from server_host */
|
|
|
|
if ((c = strchr(st.server_host, '\t'))) *c = '\0';
|
|
|
|
|
|
|
|
/* Guess request filetype so we can die() with style... */
|
|
|
|
st.req_filetype = gopher_filetype(&st, st.req_selector, FALSE);
|
|
|
|
|
|
|
|
/* Convert seletor to path & stat() */
|
|
|
|
selector_to_path(&st);
|
|
|
|
if (st.debug) syslog(LOG_INFO, "path to resource is \"%s\"", st.req_realpath);
|
|
|
|
|
|
|
|
if (stat(st.req_realpath, &file) == ERROR) {
|
|
|
|
|
|
|
|
/* Handle virtual /caps.txt requests */
|
|
|
|
if (st.opt_caps && sstrncmp(st.req_selector, CAPS_TXT) == MATCH) {
|
|
|
|
#ifdef HAVE_SHMEM
|
|
|
|
caps_txt(&st, shm);
|
|
|
|
#else
|
|
|
|
caps_txt(&st, NULL);
|
|
|
|
#endif
|
|
|
|
return OK;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Requested file not found - die() */
|
|
|
|
die(&st, ERR_NOTFOUND, NULL);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Fetch request filesize from stat() */
|
|
|
|
st.req_filesize = file.st_size;
|
|
|
|
|
|
|
|
/* Everyone must have read access but no write access */
|
|
|
|
if ((file.st_mode & S_IROTH) == 0)
|
|
|
|
die(&st, ERR_ACCESS, "File or directory not world-readable");
|
|
|
|
if ((file.st_mode & S_IWOTH) != 0)
|
|
|
|
die(&st, ERR_ACCESS, "File or directory world-writeable");
|
|
|
|
|
|
|
|
/* If stat said it was a dir then it's a menu */
|
|
|
|
if ((file.st_mode & S_IFMT) == S_IFDIR) st.req_filetype = TYPE_MENU;
|
|
|
|
|
|
|
|
/* Not a dir - let's guess the filetype again... */
|
|
|
|
else if ((file.st_mode & S_IFMT) == S_IFREG)
|
|
|
|
st.req_filetype = gopher_filetype(&st, st.req_realpath, st.opt_magic);
|
|
|
|
|
|
|
|
/* Menu selectors must end with a slash */
|
|
|
|
if (st.req_filetype == TYPE_MENU && strlast(st.req_selector) != '/')
|
|
|
|
sstrlcat(st.req_selector, "/");
|
|
|
|
|
|
|
|
/* Change directory to wherever the resource was */
|
|
|
|
sstrlcpy(buf, st.req_realpath);
|
|
|
|
|
|
|
|
if ((file.st_mode & S_IFMT) != S_IFDIR) c = dirname(buf);
|
|
|
|
else c = buf;
|
|
|
|
|
|
|
|
if (chdir(c) == ERROR) die(&st, ERR_ACCESS, NULL);
|
|
|
|
|
|
|
|
/* Keep count of hits and data transfer */
|
|
|
|
#ifdef HAVE_SHMEM
|
|
|
|
if (shm) {
|
|
|
|
shm->hits++;
|
|
|
|
shm->kbytes += st.req_filesize / 1024;
|
|
|
|
|
|
|
|
/* Update user session */
|
|
|
|
update_shm_session(&st, shm);
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/* Log the request */
|
|
|
|
if (st.opt_syslog) {
|
|
|
|
syslog(LOG_INFO, "request for \"gopher://%s:%i/%c%s\" from %s",
|
|
|
|
st.server_host,
|
|
|
|
st.server_port,
|
|
|
|
st.req_filetype,
|
|
|
|
st.req_selector,
|
|
|
|
st.req_remote_addr);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Check file type & act accordingly */
|
|
|
|
switch (file.st_mode & S_IFMT) {
|
|
|
|
case S_IFDIR:
|
|
|
|
log_combined(&st, HTTP_OK);
|
|
|
|
gopher_menu(&st);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case S_IFREG:
|
|
|
|
log_combined(&st, HTTP_OK);
|
|
|
|
gopher_file(&st);
|
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
|
|
|
die(&st, ERR_ACCESS, "Refusing to serve out special files");
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Clean exit */
|
|
|
|
return OK;
|
|
|
|
}
|
|
|
|
|