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* Copyright (c) 2020, 2021, 2022 Omar Polo <op@omarpolo.com>
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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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* 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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#ifndef GMID_H
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#define GMID_H
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#include "config.h"
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#include <sys/socket.h>
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#include <sys/types.h>
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#include <arpa/inet.h>
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#include <netinet/in.h>
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#include <dirent.h>
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#include <limits.h>
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#include <netdb.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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#include <tls.h>
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#include <unistd.h>
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#include <openssl/x509.h>
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#if HAVE_EVENT2
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# include <event2/event.h>
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# include <event2/event_compat.h>
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# include <event2/event_struct.h>
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# include <event2/buffer.h>
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# include <event2/buffer_compat.h>
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# include <event2/bufferevent.h>
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# include <event2/bufferevent_struct.h>
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# include <event2/bufferevent_compat.h>
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# include <event.h>
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#define GMID_STRING "gmid " VERSION
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#define GMID_VERSION "gmid/" VERSION
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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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#define TEMP_REDIRECT 30
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#define TEMP_FAILURE 40
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#define CGI_ERROR 42
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#define PROXY_ERROR 43
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#define NOT_FOUND 51
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#define PROXY_REFUSED 53
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#define BAD_REQUEST 59
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#define CLIENT_CERT_REQ 60
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#define CERT_NOT_AUTH 61
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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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#define FCGI_MAX 32
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#define PROC_MAX 16
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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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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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struct fcgi {
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char *path;
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char *port;
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char *prog;
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extern struct fcgi fcgi[FCGI_MAX];
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TAILQ_HEAD(proxyhead, proxy);
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struct proxy {
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char *match_proto;
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char *match_host;
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const char *match_port;
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char *host;
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const char *port;
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char *sni;
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int notls;
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uint32_t protocols;
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int noverifyname;
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uint8_t *cert;
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size_t certlen;
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uint8_t *key;
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size_t keylen;
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X509_STORE *reqca;
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TAILQ_ENTRY(proxy) proxies;
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TAILQ_HEAD(lochead, location);
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struct location {
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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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int auto_index; /* 0 auto, -1 off, 1 on */
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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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X509_STORE *reqca;
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int disable_log;
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int fcgi;
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const char *dir;
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int dirfd;
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TAILQ_ENTRY(location) locations;
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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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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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extern TAILQ_HEAD(vhosthead, vhost) hosts;
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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 *ocsp;
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const char *cgi;
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const char *entrypoint;
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TAILQ_ENTRY(vhost) vhosts;
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* the first location rule is always '*' and holds the default
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* settings for the vhost, then follows the "real" location
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* rules as specified in the configuration.
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struct lochead locations;
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struct envhead env;
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struct envhead params;
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struct aliashead aliases;
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struct proxyhead proxies;
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struct etm { /* extension to mime */
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char *mime;
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char *ext;
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struct mime {
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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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* Backward compatibility: types override the built-in list,
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* but the deprecated `mime' and `map' don't. It's still too
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* early to remove `mime' and `map' from the config parser.
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int skip_defaults;
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struct conf {
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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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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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int prefork;
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extern const char *config_path;
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extern struct conf conf;
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extern struct imsgbuf logibuf, exibuf, servibuf[PROC_MAX];
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extern int servpipes[PROC_MAX];
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typedef void (imsg_handlerfn)(struct imsgbuf*, struct imsg*, size_t);
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REQUEST_UNDECIDED,
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REQUEST_FILE,
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REQUEST_DIR,
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REQUEST_CGI,
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REQUEST_FCGI,
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REQUEST_PROXY,
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REQUEST_DONE,
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#define IS_INTERNAL_REQUEST(x) \
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((x) != REQUEST_CGI && \
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(x) != REQUEST_FCGI && \
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(x) != REQUEST_PROXY)
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struct client {
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uint32_t id;
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struct tls *ctx;
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char *req;
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size_t reqlen;
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struct iri iri;
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char domain[DOMAIN_NAME_LEN];
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struct bufferevent *bev;
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int type;
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struct bufferevent *cgibev;
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struct proxy *proxy;
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struct bufferevent *proxybev;
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struct tls *proxyctx;
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int proxyevset;
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struct event proxyev;
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char *header;
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int code;
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const char *meta;
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int fd, pfd;
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struct dirent **dir;
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int dirlen, diroff;
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/* big enough to store STATUS + SPACE + META + CRLF */
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char sbuf[1029];
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ssize_t len, off;
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struct sockaddr_storage addr;
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struct vhost *host; /* host they're talking to */
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size_t loc; /* location matched */
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SPLAY_ENTRY(client) entry;
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SPLAY_HEAD(client_tree_id, client);
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extern struct client_tree_id clients;
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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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char version[8];
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char cipher[32];
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int cipher_strength;
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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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size_t loc_off;
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struct connreq {
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char host[NI_MAXHOST];
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char port[NI_MAXSERV];
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int flag;
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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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enum imsg_type {
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IMSG_CGI_REQ,
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IMSG_CGI_RES,
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IMSG_FCGI_REQ,
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IMSG_FCGI_FD,
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IMSG_CONN_REQ,
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IMSG_CONN_FD,
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IMSG_LOG,
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IMSG_LOG_REQUEST,
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IMSG_LOG_TYPE,
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IMSG_QUIT,
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/* gmid.c */
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char *data_dir(void);
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void load_local_cert(const char*, const char*);
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void load_vhosts(void);
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int make_socket(int, int);
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void setup_tls(void);
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void init_config(void);
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void free_config(void);
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void drop_priv(void);
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2021-02-06
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void yyerror(const char*, ...);
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void parse_conf(const char*);
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void print_conf(void);
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2021-06-29
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int cmdline_symset(char *);
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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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int logger_main(int, struct imsgbuf*);
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/* mime.c */
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void init_mime(struct mime*);
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int add_mime(struct mime*, const char*, const char*);
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int load_default_mime(struct mime*);
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void sort_mime(struct mime *);
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const char *mime(struct vhost*, const char*);
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void free_mime(struct mime *);
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/* server.c */
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extern int shutting_down;
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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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int vhost_auto_index(struct vhost*, const char*);
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int vhost_block_return(struct vhost*, const char*, int*, const char**);
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2021-05-09
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int vhost_fastcgi(struct vhost*, const char*);
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int vhost_dirfd(struct vhost*, const char*, size_t*);
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2021-02-06
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int vhost_strip(struct vhost*, const char*);
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X509_STORE *vhost_require_ca(struct vhost*, const char*);
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2021-02-23
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int vhost_disable_log(struct vhost*, const char*);
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2021-02-03
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void mark_nonblock(int);
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void client_write(struct bufferevent *, void *);
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void start_reply(struct client*, int, const char*);
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void client_close(struct client *);
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struct client *client_by_id(int);
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2021-03-19
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void loop(struct tls*, int, int, struct imsgbuf*);
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int client_tree_cmp(struct client *, struct client *);
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SPLAY_PROTOTYPE(client_tree_id, client, entry, client_tree_cmp);
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op
/* 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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/* 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
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int send_iri(int, struct iri*);
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2021-02-01
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int recv_iri(int, struct iri*);
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void free_recvd_iri(struct iri*);
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int send_vhost(int, struct vhost*);
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2021-01-16
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int recv_vhost(int, struct vhost**);
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2021-02-07
op
int send_time(int, time_t);
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2021-02-07
op
int recv_time(int, time_t*);
408
2021-01-16
op
int send_fd(int, int);
409
2021-01-16
op
int recv_fd(int);
410
2021-03-19
op
int executor_main(struct imsgbuf*);
412
2021-05-09
op
/* fcgi.c */
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2021-09-26
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void fcgi_read(struct bufferevent *, void *);
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2021-09-26
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void fcgi_write(struct bufferevent *, void *);
415
2021-09-26
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void fcgi_error(struct bufferevent *, short, void *);
416
2021-10-07
op
void fcgi_req(struct client *);
418
2021-01-15
op
/* sandbox.c */
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2021-03-20
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void sandbox_server_process(void);
420
2021-03-20
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void sandbox_executor_process(void);
421
2021-03-20
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void sandbox_logger_process(void);
423
2021-01-09
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/* utf8.c */
424
2021-01-09
op
int valid_multibyte_utf8(struct parser*);
425
2021-01-27
op
char *utf8_nth(char*, size_t);
427
2021-01-11
op
/* iri.c */
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2021-01-11
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int parse_iri(char*, struct iri*, const char**);
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2021-02-01
op
int serialize_iri(struct iri*, char*, size_t);
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2022-07-04
op
int encode_path(char *, size_t, const char *);
431
2021-02-07
op
char *pct_decode_str(char *);
433
2021-12-29
op
/* proxy.c */
434
2021-12-29
op
int proxy_init(struct client *);
436
2021-01-27
op
/* puny.c */
437
2021-01-29
op
int puny_decode(const char*, char*, size_t, const char**);
439
2021-01-27
op
/* utils.c */
440
2021-02-04
op
void block_signals(void);
441
2021-02-04
op
void unblock_signals(void);
442
2021-01-27
op
int starts_with(const char*, const char*);
443
2021-01-27
op
int ends_with(const char*, const char*);
444
2021-01-27
op
ssize_t filesize(int);
445
2021-02-01
op
char *absolutify_path(const char*);
446
2021-02-04
op
char *xstrdup(const char*);
447
2021-03-31
op
void *xcalloc(size_t, size_t);
448
2021-02-07
op
void gen_certificate(const char*, const char*, const char*);
449
2021-02-09
op
X509_STORE *load_ca(const char*);
450
2021-02-09
op
int validate_against_ca(X509_STORE*, const uint8_t*, size_t);
451
2021-03-19
op
void dispatch_imsg(struct imsgbuf*, imsg_handlerfn**, size_t);
