2014-01-25 04:21:40 -05:00
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/*
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2016-12-30 03:41:49 -05:00
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* Gophernicus - Copyright (c) 2009-2017 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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* Send a binary file to the client
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*/
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void send_binary_file(state *st)
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{
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/* Faster sendfile() version */
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#ifdef HAVE_SENDFILE
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int fd;
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off_t offset = 0;
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if (st->debug) syslog(LOG_INFO, "outputting binary file \"%s\"", st->req_realpath);
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if ((fd = open(st->req_realpath, O_RDONLY)) == ERROR) return;
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sendfile(1, fd, &offset, st->req_filesize);
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close(fd);
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/* More compatible POSIX fread()/fwrite() version */
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#else
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FILE *fp;
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char buf[BUFSIZE];
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int bytes;
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if (st->debug) syslog(LOG_INFO, "outputting binary file \"%s\"", st->req_realpath);
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if ((fp = fopen(st->req_realpath , "r")) == NULL) return;
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while ((bytes = fread(buf, 1, sizeof(buf), fp)) > 0)
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fwrite(buf, bytes, 1, stdout);
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fclose(fp);
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#endif
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}
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/*
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* Send a text file to the client
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*/
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void send_text_file(state *st)
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{
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FILE *fp;
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char in[BUFSIZE];
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char out[BUFSIZE];
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int line;
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if (st->debug) syslog(LOG_INFO, "outputting text file \"%s\"", st->req_realpath);
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if ((fp = fopen(st->req_realpath , "r")) == NULL) return;
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/* Loop through the file line by line */
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line = 0;
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while (fgets(in, sizeof(in), fp)) {
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/* Covert to output charset & print */
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if (st->opt_iconv) sstrniconv(st->out_charset, out, in);
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else sstrlcpy(out, in);
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chomp(out);
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#ifdef ENABLE_STRICT_RFC1436
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if (strcmp(out, ".") == MATCH) printf(".." CRLF);
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else
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#endif
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printf("%s" CRLF, out);
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line++;
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}
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#ifdef ENABLE_STRICT_RFC1436
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printf("." CRLF);
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#endif
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fclose(fp);
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}
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/*
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* Print hURL redirect page
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*/
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void url_redirect(state *st)
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{
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char dest[BUFSIZE];
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char *c;
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/* Basic security checking */
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sstrlcpy(dest, st->req_selector + 4);
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if (sstrncmp(dest, "http://") != MATCH &&
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2017-06-16 02:10:06 -04:00
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sstrncmp(dest, "https://") != MATCH &&
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2014-01-25 04:21:40 -05:00
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sstrncmp(dest, "ftp://") != MATCH &&
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sstrncmp(dest, "mailto:") != MATCH)
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die(st, ERR_ACCESS, "Refusing to HTTP redirect unsafe protocols");
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if ((c = strchr(dest, '"'))) *c = '\0';
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if ((c = strchr(dest, '?'))) *c = '\0';
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/* Log the redirect */
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if (st->opt_syslog) {
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2017-02-04 03:33:17 -05:00
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syslog(LOG_INFO, "request for \"gopher%s://%s:%i/h%s\" from %s",
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(st->server_port == st->server_tls_port ? "s" : ""),
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2014-01-25 04:21:40 -05:00
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st->server_host,
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st->server_port,
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st->req_selector,
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st->req_remote_addr);
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}
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log_combined(st, HTTP_OK);
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/* Output 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=\"Refresh\" content=\"1;URL=%1$s\">\n"
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" <META HTTP-EQUIV=\"Content-Type\" CONTENT=\"text/html;charset=iso-8859-1\">\n"
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" <TITLE>URL Redirect page</TITLE>\n"
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"</HEAD>\n<BODY>\n"
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"<STRONG>Redirecting to <A HREF=\"%1$s\">%1$s</A></STRONG>\n"
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"<PRE>\n", dest);
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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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/*
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* Handle /server-status
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*/
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#ifdef HAVE_SHMEM
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void server_status(state *st, shm_state *shm, int shmid)
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{
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struct shmid_ds shm_ds;
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time_t now;
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time_t uptime;
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int sessions;
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int i;
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/* Log the request */
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if (st->opt_syslog) {
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2017-02-04 03:33:17 -05:00
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syslog(LOG_INFO, "request for \"gopher%s://%s:%i/0" SERVER_STATUS "\" from %s",
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(st->server_port == st->server_tls_port ? "s" : ""),
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2014-01-25 04:21:40 -05:00
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st->server_host,
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st->server_port,
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st->req_remote_addr);
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}
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log_combined(st, HTTP_OK);
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/* Quit if shared memory isn't initialized yet */
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if (!shm) return;
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/* Update counters */
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shm->hits++;
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shm->kbytes += 1;
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/* Get server uptime */
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now = time(NULL);
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uptime = (now - shm->start_time) + 1;
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/* Get shared memory info */
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shmctl(shmid, IPC_STAT, &shm_ds);
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/* Print statistics */
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printf("Total Accesses: %li" CRLF
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"Total kBytes: %li" CRLF
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"Uptime: %i" CRLF
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"ReqPerSec: %.3f" CRLF
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"BytesPerSec: %li" CRLF
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"BytesPerReq: %li" CRLF
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"BusyServers: %i" CRLF
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"IdleServers: 0" CRLF
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"CPULoad: %.2f" CRLF,
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shm->hits,
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shm->kbytes,
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(int) uptime,
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(float) shm->hits / (float) uptime,
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shm->kbytes * 1024 / (int) uptime,
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shm->kbytes * 1024 / (shm->hits + 1),
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(int) shm_ds.shm_nattch,
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loadavg());
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/* Print active sessions */
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sessions = 0;
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for (i = 0; i < SHM_SESSIONS; i++) {
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if ((now - shm->session[i].req_atime) < st->session_timeout) {
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sessions++;
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2017-02-04 03:33:17 -05:00
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printf("Session: %-4i %-40s %-4li %-7li gopher%s://%s:%i/%c%s" CRLF,
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2014-01-25 04:21:40 -05:00
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(int) (now - shm->session[i].req_atime),
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shm->session[i].req_remote_addr,
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shm->session[i].hits,
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shm->session[i].kbytes,
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2017-02-04 03:33:17 -05:00
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(shm->session[i].server_port == st->server_tls_port ? "s" : ""),
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2014-01-25 04:21:40 -05:00
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shm->session[i].server_host,
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shm->session[i].server_port,
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shm->session[i].req_filetype,
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shm->session[i].req_selector);
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}
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}
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printf("Total Sessions: %i" CRLF, sessions);
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}
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#endif
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/*
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* Handle /caps.txt
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*/
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void caps_txt(state *st, shm_state *shm)
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{
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/* Log the request */
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if (st->opt_syslog) {
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2017-02-04 03:33:17 -05:00
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syslog(LOG_INFO, "request for \"gopher%s://%s:%i/0" CAPS_TXT "\" from %s",
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(st->server_port == st->server_tls_port ? "s" : ""),
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2014-01-25 04:21:40 -05:00
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st->server_host,
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st->server_port,
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st->req_remote_addr);
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}
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log_combined(st, HTTP_OK);
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/* Update counters */
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#ifdef HAVE_SHMEM
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if (shm) {
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shm->hits++;
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shm->kbytes += 1;
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/* Update session data */
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st->req_filesize += 1024;
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update_shm_session(st, shm);
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}
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#endif
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/* Standard caps.txt stuff */
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printf("CAPS" CRLF
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CRLF
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"##" CRLF
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"## This is an automatically generated caps file." CRLF
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"##" CRLF
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CRLF
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"CapsVersion=1" CRLF
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"ExpireCapsAfter=%i" CRLF
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CRLF
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"PathDelimeter=/" CRLF
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"PathIdentity=." CRLF
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"PathParent=.." CRLF
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"PathParentDouble=FALSE" CRLF
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"PathKeepPreDelimeter=FALSE" CRLF
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2015-01-01 01:38:59 -05:00
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"ServerSupportsStdinScripts=TRUE" CRLF
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2015-01-04 01:42:11 -05:00
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"ServerDefaultEncoding=%s" CRLF
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2017-02-04 03:18:49 -05:00
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"ServerTLSPort=%i" CRLF
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2014-01-25 04:21:40 -05:00
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CRLF
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"ServerSoftware=" SERVER_SOFTWARE CRLF
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2016-10-18 06:18:54 -04:00
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"ServerSoftwareVersion=" VERSION " \"" CODENAME "\"" CRLF
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2014-01-25 04:21:40 -05:00
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"ServerArchitecture=%s" CRLF,
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st->session_timeout,
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2015-01-04 01:42:11 -05:00
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strcharset(st->out_charset),
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2017-02-04 03:18:49 -05:00
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st->server_tls_port,
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2014-01-25 04:21:40 -05:00
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st->server_platform);
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/* Optional keys */
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if (*st->server_description)
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printf("ServerDescription=%s" CRLF, st->server_description);
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if (*st->server_location)
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printf("ServerGeolocationString=%s" CRLF, st->server_location);
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if (*st->server_admin)
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printf("ServerAdmin=%s" CRLF, st->server_admin);
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}
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/*
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* Setup environment variables as per the CGI spec
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*/
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void setenv_cgi(state *st, char *script)
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{
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char buf[BUFSIZE];
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/* Security */
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setenv("PATH", SAFE_PATH, 1);
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/* Set up the environment as per CGI spec */
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setenv("GATEWAY_INTERFACE", "CGI/1.1", 1);
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setenv("CONTENT_LENGTH", "0", 1);
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setenv("QUERY_STRING", st->req_query_string, 1);
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snprintf(buf, sizeof(buf), SERVER_SOFTWARE_FULL, st->server_platform);
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setenv("SERVER_SOFTWARE", buf, 1);
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setenv("SERVER_ARCH", st->server_platform, 1);
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setenv("SERVER_DESCRIPTION", st->server_description, 1);
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snprintf(buf, sizeof(buf), SERVER_SOFTWARE "/" VERSION);
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setenv("SERVER_VERSION", buf, 1);
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if (st->req_protocol == PROTO_HTTP)
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setenv("SERVER_PROTOCOL", "HTTP/0.9", 1);
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else
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setenv("SERVER_PROTOCOL", "RFC1436", 1);
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|
2017-02-04 03:18:49 -05:00
|
|
|
if (st->server_port == st->server_tls_port) {
|
|
|
|
|
setenv("HTTPS", "on", 1);
|
|
|
|
|
setenv("TLS", "on", 1);
|
|
|
|
|
}
|
|
|
|
|
|
2014-01-25 04:21:40 -05:00
|
|
|
setenv("SERVER_NAME", st->server_host, 1);
|
|
|
|
|
snprintf(buf, sizeof(buf), "%i", st->server_port);
|
|
|
|
|
setenv("SERVER_PORT", buf, 1);
|
2017-02-04 03:18:49 -05:00
|
|
|
snprintf(buf, sizeof(buf), "%i", st->server_tls_port);
|
|
|
|
|
setenv("SERVER_TLS_PORT", buf, 1);
|
2014-01-25 04:21:40 -05:00
|
|
|
setenv("REQUEST_METHOD", "GET", 1);
|
|
|
|
|
setenv("DOCUMENT_ROOT", st->server_root, 1);
|
|
|
|
|
setenv("SCRIPT_NAME", st->req_selector, 1);
|
|
|
|
|
setenv("SCRIPT_FILENAME", script, 1);
|
|
|
|
|
setenv("LOCAL_ADDR", st->req_local_addr, 1);
|
|
|
|
|
setenv("REMOTE_ADDR", st->req_remote_addr, 1);
|
|
|
|
|
setenv("HTTP_REFERER", st->req_referrer, 1);
|
2014-12-19 07:21:34 -05:00
|
|
|
#ifdef HAVE_SHMEM
|
|
|
|
|
snprintf(buf, sizeof(buf), "%x", st->session_id);
|
|
|
|
|
setenv("SESSION_ID", buf, 1);
|
|
|
|
|
#endif
|
2014-01-25 04:21:40 -05:00
|
|
|
setenv("HTTP_ACCEPT_CHARSET", strcharset(st->out_charset), 1);
|
|
|
|
|
|
|
|
|
|
/* Gophernicus extras */
|
|
|
|
|
snprintf(buf, sizeof(buf), "%c", st->req_filetype);
|
|
|
|
|
setenv("GOPHER_FILETYPE", buf, 1);
|
|
|
|
|
setenv("GOPHER_CHARSET", strcharset(st->out_charset), 1);
|
|
|
|
|
setenv("GOPHER_REFERER", st->req_referrer, 1);
|
|
|
|
|
snprintf(buf, sizeof(buf), "%i", st->out_width);
|
|
|
|
|
setenv("COLUMNS", buf, 1);
|
2016-01-01 03:55:49 -05:00
|
|
|
snprintf(buf, sizeof(buf), CODENAME);
|
|
|
|
|
setenv("SERVER_CODENAME", buf, 1);
|
2014-01-25 04:21:40 -05:00
|
|
|
|
|
|
|
|
/* Bucktooth extras */
|
|
|
|
|
if (*st->req_query_string) {
|
|
|
|
|
snprintf(buf, sizeof(buf), "%s?%s",
|
|
|
|
|
st->req_selector, st->req_query_string);
|
|
|
|
|
setenv("SELECTOR", buf, 1);
|
|
|
|
|
}
|
|
|
|
|
else setenv("SELECTOR", st->req_selector, 1);
|
|
|
|
|
|
|
|
|
|
setenv("SERVER_HOST", st->server_host, 1);
|
|
|
|
|
setenv("REQUEST", st->req_selector, 1);
|
2017-06-24 11:50:41 -04:00
|
|
|
setenv("SEARCHREQUEST", st->req_search, 1);
|
2014-01-25 04:21:40 -05:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Execute a CGI script
|
|
|
|
|
*/
|
|
|
|
|
void run_cgi(state *st, char *script, char *arg)
|
|
|
|
|
{
|
|
|
|
|
/* Setup environment & execute the binary */
|
|
|
|
|
if (st->debug) syslog(LOG_INFO, "executing script \"%s\"", script);
|
|
|
|
|
|
|
|
|
|
setenv_cgi(st, script);
|
|
|
|
|
execl(script, script, arg, NULL);
|
|
|
|
|
|
|
|
|
|
/* Didn't work - die */
|
|
|
|
|
die(st, ERR_ACCESS, NULL);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Handle file selectors
|
|
|
|
|
*/
|
|
|
|
|
void gopher_file(state *st)
|
|
|
|
|
{
|
|
|
|
|
struct stat file;
|
|
|
|
|
char buf[BUFSIZE];
|
|
|
|
|
char *c;
|
|
|
|
|
|
|
|
|
|
/* Refuse to serve out gophermaps/tags */
|
|
|
|
|
if ((c = strrchr(st->req_realpath, '/'))) c++;
|
|
|
|
|
else c = st->req_realpath;
|
|
|
|
|
|
|
|
|
|
if (strcmp(c, st->map_file) == MATCH)
|
|
|
|
|
die(st, ERR_ACCESS, "Refusing to serve out a gophermap file");
|
|
|
|
|
if (strcmp(c, st->tag_file) == MATCH)
|
|
|
|
|
die(st, ERR_ACCESS, "Refusing to serve out a gophertag file");
|
|
|
|
|
|
|
|
|
|
/* Check for & run CGI and query scripts */
|
|
|
|
|
if (strstr(st->req_realpath, st->cgi_file) || st->req_filetype == TYPE_QUERY)
|
|
|
|
|
run_cgi(st, st->req_realpath, NULL);
|
|
|
|
|
|
|
|
|
|
/* Check for a file suffix filter */
|
|
|
|
|
if (*st->filter_dir && (c = strrchr(st->req_realpath, '.'))) {
|
|
|
|
|
snprintf(buf, sizeof(buf), "%s/%s", st->filter_dir, c + 1);
|
|
|
|
|
|
|
|
|
|
/* Filter file through the script */
|
|
|
|
|
if (stat(buf, &file) == OK && (file.st_mode & S_IXOTH))
|
|
|
|
|
run_cgi(st, buf, st->req_realpath);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Check for a filetype filter */
|
|
|
|
|
if (*st->filter_dir) {
|
|
|
|
|
snprintf(buf, sizeof(buf), "%s/%c", st->filter_dir, st->req_filetype);
|
|
|
|
|
|
|
|
|
|
/* Filter file through the script */
|
|
|
|
|
if (stat(buf, &file) == OK && (file.st_mode & S_IXOTH))
|
|
|
|
|
run_cgi(st, buf, st->req_realpath);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Output regular files */
|
|
|
|
|
if (st->req_filetype == TYPE_TEXT || st->req_filetype == TYPE_MIME)
|
|
|
|
|
send_text_file(st);
|
|
|
|
|
else
|
|
|
|
|
send_binary_file(st);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
