2020-12-24 16:49:55 +01:00
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/*
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* Copyright (c) 2020 Omar Polo <op@omarpolo.com>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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2020-12-24 16:48:39 +01:00
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#ifndef GMID_H
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#define GMID_H
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2021-02-12 13:47:20 +01:00
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#include "config.h"
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2021-01-24 19:53:26 +01:00
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#include <sys/socket.h>
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#include <sys/types.h>
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2020-12-24 16:48:39 +01:00
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#include <arpa/inet.h>
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#include <netinet/in.h>
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2021-01-24 19:53:26 +01:00
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#include <dirent.h>
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2021-05-09 20:23:36 +02:00
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#include <event.h>
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2021-03-19 20:21:29 +01:00
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#include <limits.h>
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#include <netdb.h>
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2021-02-04 14:23:15 +01:00
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#include <signal.h>
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2020-12-24 16:48:39 +01:00
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#include <stdio.h>
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#include <stdlib.h>
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2021-02-07 22:47:01 +01:00
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#include <time.h>
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2020-12-24 16:48:39 +01:00
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#include <tls.h>
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#include <unistd.h>
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2021-02-09 23:30:04 +01:00
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#include <openssl/x509.h>
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2021-06-29 12:56:07 +02:00
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#define GMID_STRING "gmid 1.7"
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2021-05-15 13:11:56 +02:00
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#define GMID_VERSION "gmid/1.7"
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2020-12-24 16:48:39 +01:00
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#define GEMINI_URL_LEN (1024+3) /* URL max len + \r\n + \0 */
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#define SUCCESS 20
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2021-01-20 19:54:44 +01:00
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#define TEMP_REDIRECT 30
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2020-12-24 16:48:39 +01:00
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#define TEMP_FAILURE 40
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2021-02-01 23:04:51 +01:00
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#define CGI_ERROR 42
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2020-12-24 16:48:39 +01:00
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#define NOT_FOUND 51
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2021-01-11 15:45:57 +01:00
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#define PROXY_REFUSED 53
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2020-12-24 16:48:39 +01:00
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#define BAD_REQUEST 59
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2021-02-09 23:30:04 +01:00
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#define CLIENT_CERT_REQ 60
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#define CERT_NOT_AUTH 61
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2020-12-24 16:48:39 +01:00
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#define MAX_USERS 64
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2021-01-28 17:25:59 +01:00
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/* maximum hostname and label length, +1 for the NUL-terminator */
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#define DOMAIN_NAME_LEN (253+1)
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#define LABEL_LEN (63+1)
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2021-01-27 11:47:49 +01:00
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2021-05-09 20:23:36 +02:00
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#define FCGI_MAX 32
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2021-03-03 18:22:01 +01:00
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#define PROC_MAX 16
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2021-05-09 20:23:36 +02:00
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struct fcgi {
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int id;
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char *path;
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char *port;
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char *prog;
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int fd;
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struct event e;
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2021-07-06 12:54:27 +02:00
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/* number of pending clients */
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int pending;
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2021-05-09 20:23:36 +02:00
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#define FCGI_OFF 0
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#define FCGI_INFLIGHT 1
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#define FCGI_READY 2
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int s;
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};
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extern struct fcgi fcgi[FCGI_MAX];
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2021-03-31 18:32:18 +02:00
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TAILQ_HEAD(lochead, location);
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2021-01-24 15:11:40 +01:00
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struct location {
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2021-01-27 16:53:30 +01:00
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const char *match;
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const char *lang;
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const char *default_mime;
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const char *index;
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2021-01-24 19:53:26 +01:00
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int auto_index; /* 0 auto, -1 off, 1 on */
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2021-02-06 18:22:37 +01:00
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int block_code;
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const char *block_fmt;
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int strip;
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2021-02-09 23:30:04 +01:00
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X509_STORE *reqca;
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2021-02-22 09:53:14 +01:00
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int disable_log;
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2021-05-09 20:23:36 +02:00
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int fcgi;
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2021-03-31 18:32:18 +02:00
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2021-04-30 19:16:34 +02:00
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const char *dir;
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int dirfd;
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2021-03-31 18:32:18 +02:00
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TAILQ_ENTRY(location) locations;
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2021-01-24 15:11:40 +01:00
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};
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2021-04-28 14:43:17 +02:00
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TAILQ_HEAD(envhead, envlist);
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struct envlist {
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char *name;
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char *value;
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TAILQ_ENTRY(envlist) envs;
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};
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2021-04-29 20:23:35 +02:00
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TAILQ_HEAD(aliashead, alist);
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struct alist {
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char *alias;
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TAILQ_ENTRY(alist) aliases;
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};
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2021-03-31 18:32:18 +02:00
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extern TAILQ_HEAD(vhosthead, vhost) hosts;
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2021-01-15 10:17:43 +01:00
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struct vhost {
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const char *domain;
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const char *cert;
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const char *key;
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const char *cgi;
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2021-02-06 19:28:43 +01:00
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const char *entrypoint;
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2021-01-30 13:04:20 +01:00
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2021-03-31 18:32:18 +02:00
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TAILQ_ENTRY(vhost) vhosts;
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2021-07-07 11:46:37 +02:00
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/*
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* the first location rule is always '*' and holds the default
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2021-03-31 18:32:18 +02:00
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* settings for the vhost, then follows the "real" location
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2021-07-07 11:46:37 +02:00
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* rules as specified in the configuration.
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*/
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2021-03-31 18:32:18 +02:00
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struct lochead locations;
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2021-04-28 14:43:17 +02:00
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struct envhead env;
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2021-06-11 17:48:56 +02:00
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struct envhead params;
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2021-04-29 20:23:35 +02:00
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struct aliashead aliases;
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2021-01-15 10:17:43 +01:00
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};
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2021-01-18 19:48:37 +01:00
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struct etm { /* extension to mime */
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const char *mime;
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const char *ext;
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};
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2021-01-21 16:01:37 +01:00
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struct mime {
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2021-01-18 19:48:37 +01:00
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struct etm *t;
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size_t len;
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size_t cap;
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};
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2021-01-15 10:17:43 +01:00
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struct conf {
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2021-02-07 16:30:28 +01:00
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/* from command line */
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int foreground;
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int verbose;
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/* in the config */
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2021-01-25 11:30:07 +01:00
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int port;
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int ipv6;
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uint32_t protos;
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struct mime mime;
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char *chroot;
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char *user;
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2021-02-07 13:05:32 +01:00
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int prefork;
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2021-01-15 10:17:43 +01:00
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};
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2021-02-08 13:44:34 +01:00
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extern const char *config_path;
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2021-01-15 10:17:43 +01:00
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extern struct conf conf;
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2021-02-23 13:05:54 +01:00
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2021-03-19 20:21:29 +01:00
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extern struct imsgbuf logibuf, exibuf, servibuf[PROC_MAX];
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2021-02-04 14:23:15 +01:00
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2021-03-03 18:22:01 +01:00
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extern int servpipes[PROC_MAX];
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2021-01-20 19:54:44 +01:00
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struct iri {
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char *schema;
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char *host;
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char *port;
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uint16_t port_no;
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char *path;
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char *query;
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char *fragment;
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};
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struct parser {
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char *iri;
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struct iri *parsed;
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const char *err;
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};
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2021-05-09 20:23:36 +02:00
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struct mbuf {
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size_t len;
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size_t off;
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TAILQ_ENTRY(mbuf) mbufs;
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char data[];
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};
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TAILQ_HEAD(mbufhead, mbuf);
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2021-03-19 20:21:29 +01:00
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typedef void (imsg_handlerfn)(struct imsgbuf*, struct imsg*, size_t);
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2021-02-08 11:01:45 +01:00
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typedef void (*statefn)(int, short, void*);
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2020-12-24 16:48:39 +01:00
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2021-02-01 21:24:14 +01:00
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/*
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* DFA: handle_handshake is the initial state, close_conn the final.
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2021-02-02 10:48:32 +01:00
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* Sometimes we have an enter_* function to handle the state switch.
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2021-02-01 21:24:14 +01:00
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*
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* handle_handshake -> handle_open_conn
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* handle_handshake -> close_conn // on err
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*
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2021-02-01 23:04:51 +01:00
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* handle_open_conn -> handle_cgi_reply // via open_file/dir/...
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2021-05-09 20:23:36 +02:00
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* handle_open_conn -> send_fcgi_req // via apply_fastcgi, IMSG_FCGI_FD
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2021-02-02 10:48:32 +01:00
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* handle_open_conn -> handle_dirlist // ...same
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2021-02-01 21:24:14 +01:00
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* handle_open_conn -> send_file // ...same
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2021-02-01 23:04:51 +01:00
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* handle_open_conn -> start_reply // on error
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*
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* handle_cgi_reply -> handle_cgi // after logging the CGI reply
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* handle_cgi_reply -> start_reply // on error
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2021-02-01 21:24:14 +01:00
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*
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* handle_cgi -> close_conn
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*
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2021-05-09 20:23:36 +02:00
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* send_fcgi_req -> copy_mbuf // via handle_fcgi
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* handle_fcgi -> close_all // on error
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* copy_mbuf -> close_conn // on success/error
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*
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2021-02-02 10:48:32 +01:00
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* handle_dirlist -> send_directory_listing
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* handle_dirlist -> close_conn // on error
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*
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2021-02-01 21:24:14 +01:00
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* send_directory_listing -> close_conn
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*
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* send_file -> close_conn
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*/
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2020-12-24 16:48:39 +01:00
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struct client {
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2021-03-19 20:21:29 +01:00
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int id;
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2020-12-24 16:48:39 +01:00
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struct tls *ctx;
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2021-01-20 19:54:44 +01:00
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char req[GEMINI_URL_LEN];
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struct iri iri;
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2021-01-27 11:47:49 +01:00
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char domain[DOMAIN_NAME_LEN];
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2021-05-09 20:23:36 +02:00
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/*
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* start_reply uses this to know what function call after the
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* reply. It's also used as sentinel value in fastcgi to know
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* if the server has closed the request.
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*/
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2021-02-08 11:01:45 +01:00
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statefn next;
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2021-05-09 20:23:36 +02:00
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2020-12-24 16:48:39 +01:00
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int code;
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const char *meta;
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2021-02-08 11:01:45 +01:00
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int fd, pfd;
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2021-04-25 14:06:54 +02:00
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struct dirent **dir;
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int dirlen, diroff;
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2021-05-09 20:23:36 +02:00
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int fcgi;
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2021-03-29 11:42:06 +02:00
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/* big enough to store STATUS + SPACE + META + CRLF */
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char sbuf[1029];
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2021-02-12 12:27:33 +01:00
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ssize_t len, off;
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2021-03-29 11:42:06 +02:00
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2021-05-09 20:23:36 +02:00
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struct mbufhead mbufhead;
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2021-01-10 23:29:22 +01:00
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struct sockaddr_storage addr;
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2021-03-19 20:21:29 +01:00
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struct vhost *host; /* host they're talking to */
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2021-05-15 12:31:43 +02:00
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size_t loc; /* location matched */
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2021-03-19 20:21:29 +01:00
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};
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2021-05-09 20:23:36 +02:00
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extern struct client clients[MAX_USERS];
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2021-03-19 20:21:29 +01:00
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struct cgireq {
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char buf[GEMINI_URL_LEN];
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size_t iri_schema_off;
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size_t iri_host_off;
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size_t iri_port_off;
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size_t iri_path_off;
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size_t iri_query_off;
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size_t iri_fragment_off;
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int iri_portno;
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char spath[PATH_MAX+1];
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char relpath[PATH_MAX+1];
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char addr[NI_MAXHOST+1];
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/* AFAIK there isn't an upper limit for these two fields. */
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char subject[64+1];
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char issuer[64+1];
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char hash[128+1];
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2021-04-13 08:59:54 +02:00
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char version[8];
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char cipher[32];
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int cipher_strength;
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2021-03-19 20:21:29 +01:00
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time_t notbefore;
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time_t notafter;
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size_t host_off;
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2021-04-30 19:16:34 +02:00
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size_t loc_off;
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2020-12-24 16:48:39 +01:00
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};
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enum {
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FILE_EXISTS,
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FILE_EXECUTABLE,
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FILE_DIRECTORY,
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FILE_MISSING,
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};
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2021-03-19 20:21:29 +01:00
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enum imsg_type {
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IMSG_CGI_REQ,
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IMSG_CGI_RES,
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2021-05-09 20:23:36 +02:00
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IMSG_FCGI_REQ,
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IMSG_FCGI_FD,
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2021-03-19 20:21:29 +01:00
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IMSG_LOG,
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2021-06-15 10:06:10 +02:00
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IMSG_LOG_TYPE,
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2021-03-19 20:21:29 +01:00
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IMSG_QUIT,
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};
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2020-12-25 13:13:12 +01:00
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/* gmid.c */
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2021-01-25 15:08:31 +01:00
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char *data_dir(void);
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void load_local_cert(const char*, const char*);
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2021-01-25 11:30:07 +01:00
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void load_vhosts(void);
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2021-01-21 15:49:11 +01:00
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int make_socket(int, int);
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2021-01-25 11:30:07 +01:00
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void setup_tls(void);
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2021-01-24 15:11:40 +01:00
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void init_config(void);
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2021-02-04 14:23:15 +01:00
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void free_config(void);
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2021-01-25 11:30:07 +01:00
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void drop_priv(void);
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2020-12-24 16:48:39 +01:00
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2021-02-06 18:22:37 +01:00
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void yyerror(const char*, ...);
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2021-01-27 17:45:45 +01:00
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void parse_conf(const char*);
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2021-06-29 14:17:40 +02:00
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int cmdline_symset(char *);
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2021-01-27 17:45:45 +01:00
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2021-02-07 16:30:28 +01:00
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/* log.c */
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void fatal(const char*, ...)
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__attribute__((format (printf, 1, 2)))
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__attribute__((__noreturn__));
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#define LOG_ATTR_FMT __attribute__((format (printf, 2, 3)))
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void log_err(struct client*, const char*, ...) LOG_ATTR_FMT;
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void log_warn(struct client*, const char*, ...) LOG_ATTR_FMT;
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void log_notice(struct client*, const char*, ...) LOG_ATTR_FMT;
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void log_info(struct client*, const char*, ...) LOG_ATTR_FMT;
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void log_debug(struct client*, const char*, ...) LOG_ATTR_FMT;
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void log_request(struct client*, char*, size_t);
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2021-02-23 13:05:54 +01:00
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int logger_main(int, struct imsgbuf*);
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2021-02-07 16:30:28 +01:00
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2021-01-18 19:18:57 +01:00
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/* mime.c */
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2021-01-21 16:01:37 +01:00
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void init_mime(struct mime*);
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void add_mime(struct mime*, const char*, const char*);
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void load_default_mime(struct mime*);
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2021-01-19 12:28:41 +01:00
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const char *mime(struct vhost*, const char*);
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2021-01-18 19:18:57 +01:00
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2021-01-18 00:23:58 +01:00
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/* server.c */
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2021-07-06 12:54:27 +02:00
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extern int shutting_down;
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2021-01-24 15:11:40 +01:00
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const char *vhost_lang(struct vhost*, const char*);
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const char *vhost_default_mime(struct vhost*, const char*);
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const char *vhost_index(struct vhost*, const char*);
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2021-01-24 19:53:26 +01:00
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int vhost_auto_index(struct vhost*, const char*);
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2021-02-06 18:22:37 +01:00
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int vhost_block_return(struct vhost*, const char*, int*, const char**);
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2021-05-09 20:23:36 +02:00
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int vhost_fastcgi(struct vhost*, const char*);
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2021-05-15 12:31:43 +02:00
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int vhost_dirfd(struct vhost*, const char*, size_t*);
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2021-02-06 18:22:37 +01:00
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int vhost_strip(struct vhost*, const char*);
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2021-02-09 23:30:04 +01:00
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X509_STORE *vhost_require_ca(struct vhost*, const char*);
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2021-02-22 09:53:14 +01:00
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int vhost_disable_log(struct vhost*, const char*);
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2021-05-09 20:23:36 +02:00
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2021-02-03 15:16:39 +01:00
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void mark_nonblock(int);
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2021-05-09 20:23:36 +02:00
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void start_reply(struct client*, int, const char*);
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void close_conn(int, short, void*);
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struct client *try_client_by_id(int);
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2021-03-19 20:21:29 +01:00
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void loop(struct tls*, int, int, struct imsgbuf*);
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2021-01-18 00:23:58 +01:00
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2021-04-25 14:06:54 +02:00
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/* dirs.c */
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int scandir_fd(int, struct dirent***, int(*)(const struct dirent*),
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int(*)(const struct dirent**, const struct dirent**));
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int select_non_dot(const struct dirent*);
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int select_non_dotdot(const struct dirent*);
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2021-01-16 20:41:34 +01:00
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/* ex.c */
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int send_string(int, const char*);
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int recv_string(int, char**);
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2021-02-01 12:11:43 +01:00
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int send_iri(int, struct iri*);
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int recv_iri(int, struct iri*);
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void free_recvd_iri(struct iri*);
|
2021-01-16 20:41:34 +01:00
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int send_vhost(int, struct vhost*);
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|
int recv_vhost(int, struct vhost**);
|
2021-02-07 22:47:01 +01:00
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|
int send_time(int, time_t);
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|
int recv_time(int, time_t*);
|
2021-01-16 20:41:34 +01:00
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|
int send_fd(int, int);
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|
|
int recv_fd(int);
|
2021-03-19 20:21:29 +01:00
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|
|
int executor_main(struct imsgbuf*);
|
2021-01-16 20:41:34 +01:00
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|
2021-05-09 20:23:36 +02:00
|
|
|
/* fcgi.c */
|
2021-07-06 12:54:27 +02:00
|
|
|
void fcgi_close_backend(struct fcgi *);
|
2021-05-09 20:23:36 +02:00
|
|
|
void handle_fcgi(int, short, void*);
|
|
|
|
void send_fcgi_req(struct fcgi*, struct client*);
|
|
|
|
|
2021-01-15 15:03:45 +01:00
|
|
|
/* sandbox.c */
|
2021-03-20 09:42:08 +01:00
|
|
|
void sandbox_server_process(void);
|
|
|
|
void sandbox_executor_process(void);
|
|
|
|
void sandbox_logger_process(void);
|
2021-01-15 15:03:45 +01:00
|
|
|
|
2021-01-09 21:32:23 +01:00
|
|
|
/* utf8.c */
|
|
|
|
int valid_multibyte_utf8(struct parser*);
|
2021-01-27 11:47:49 +01:00
|
|
|
char *utf8_nth(char*, size_t);
|
2021-01-09 21:32:23 +01:00
|
|
|
|
2021-01-11 14:08:00 +01:00
|
|
|
/* iri.c */
|
|
|
|
int parse_iri(char*, struct iri*, const char**);
|
2021-01-27 16:05:16 +01:00
|
|
|
int trim_req_iri(char*, const char **);
|
2021-02-01 12:11:43 +01:00
|
|
|
int serialize_iri(struct iri*, char*, size_t);
|
2021-02-07 19:55:04 +01:00
|
|
|
char *pct_decode_str(char *);
|
2020-12-25 13:13:12 +01:00
|
|
|
|
2021-01-27 11:47:49 +01:00
|
|
|
/* puny.c */
|
2021-01-29 18:11:03 +01:00
|
|
|
int puny_decode(const char*, char*, size_t, const char**);
|
2021-01-27 11:47:49 +01:00
|
|
|
|
2021-01-27 16:35:09 +01:00
|
|
|
/* utils.c */
|
2021-02-04 14:23:15 +01:00
|
|
|
void block_signals(void);
|
|
|
|
void unblock_signals(void);
|
2021-01-27 16:35:09 +01:00
|
|
|
int starts_with(const char*, const char*);
|
|
|
|
int ends_with(const char*, const char*);
|
|
|
|
ssize_t filesize(int);
|
2021-02-01 12:11:43 +01:00
|
|
|
char *absolutify_path(const char*);
|
2021-02-04 14:23:15 +01:00
|
|
|
char *xstrdup(const char*);
|
2021-03-31 18:32:18 +02:00
|
|
|
void *xcalloc(size_t, size_t);
|
2021-02-07 16:30:28 +01:00
|
|
|
void gen_certificate(const char*, const char*, const char*);
|
2021-02-09 23:30:04 +01:00
|
|
|
X509_STORE *load_ca(const char*);
|
|
|
|
int validate_against_ca(X509_STORE*, const uint8_t*, size_t);
|
2021-03-19 20:21:29 +01:00
|
|
|
void dispatch_imsg(struct imsgbuf*, imsg_handlerfn**, size_t);
|
2021-01-27 16:35:09 +01:00
|
|
|
|
2020-12-24 16:48:39 +01:00
|
|
|
#endif
|