mirror of
https://github.com/omar-polo/gmid.git
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cd12ad1132
saves a getnameinfo(NI_NUMERICHOST) at runtime, even if it's pretty cheap.
474 lines
11 KiB
C
474 lines
11 KiB
C
/*
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* Copyright (c) 2020, 2021, 2022, 2023 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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#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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#else
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# include <event.h>
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#endif
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#include "iri.h"
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#define VERSION_STR(n) n " " VERSION
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#define GEMEXP_STRING VERSION_STR("gemexp")
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#define GG_STRING VERSION_STR("gg")
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#define GMID_STRING VERSION_STR("gmid")
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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 MEDIATYPE_NAMEMAX 128 /* file name extension */
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#define MEDIATYPE_TYPEMAX 128 /* length of type/subtype */
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#define FCGI_NAME_MAX 511
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#define FCGI_VAL_MAX 511
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#define PROC_MAX_INSTANCES 16
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#define TLS_CERT_HASH_SIZE 128
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/* forward declaration */
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struct privsep;
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struct privsep_proc;
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enum log_format {
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LOG_FORMAT_CONDENSED,
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LOG_FORMAT_COMMON,
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LOG_FORMAT_COMBINED,
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LOG_FORMAT_LEGACY,
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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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struct conf;
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TAILQ_HEAD(addrhead, address);
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struct address {
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int ai_flags;
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int ai_family;
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int ai_socktype;
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int ai_protocol;
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struct sockaddr_storage ss;
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socklen_t slen;
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int16_t port;
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/* pretty-printed version of `ss' */
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char pp[NI_MAXHOST];
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/* used in the server */
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struct conf *conf;
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int sock;
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struct event evsock; /* set if sock != -1 */
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struct tls *ctx;
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TAILQ_ENTRY(address) addrs;
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};
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TAILQ_HEAD(fcgihead, fcgi);
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struct fcgi {
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int id;
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char path[PATH_MAX];
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char port[32];
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TAILQ_ENTRY(fcgi) fcgi;
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};
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TAILQ_HEAD(envhead, envlist);
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struct envlist {
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char name[FCGI_NAME_MAX];
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char value[FCGI_VAL_MAX];
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TAILQ_ENTRY(envlist) envs;
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};
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TAILQ_HEAD(aliashead, alist);
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struct alist {
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char alias[HOST_NAME_MAX + 1];
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TAILQ_ENTRY(alist) aliases;
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};
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TAILQ_HEAD(proxyhead, proxy);
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struct proxy {
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char match_proto[32];
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char match_host[HOST_NAME_MAX + 1];
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char match_port[32];
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char host[HOST_NAME_MAX + 1];
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char port[32];
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char sni[HOST_NAME_MAX];
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int notls;
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uint32_t protocols;
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int noverifyname;
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char *cert_path;
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uint8_t *cert;
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size_t certlen;
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char *key_path;
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uint8_t *key;
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size_t keylen;
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char *reqca_path;
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X509_STORE *reqca;
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TAILQ_ENTRY(proxy) proxies;
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};
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TAILQ_HEAD(lochead, location);
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struct location {
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char match[128];
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char lang[32];
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char default_mime[MEDIATYPE_TYPEMAX];
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char index[PATH_MAX];
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int auto_index; /* 0 auto, -1 off, 1 on */
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int block_code;
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char block_fmt[GEMINI_URL_LEN];
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int strip;
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char *reqca_path;
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X509_STORE *reqca;
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int disable_log;
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int fcgi;
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int nofcgi;
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int fcgi_strip;
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struct envhead params;
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char dir[PATH_MAX];
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int dirfd;
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TAILQ_ENTRY(location) locations;
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};
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TAILQ_HEAD(vhosthead, vhost);
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struct vhost {
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char domain[HOST_NAME_MAX + 1];
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char *cert_path;
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char *key_path;
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char *ocsp_path;
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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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uint8_t *ocsp;
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size_t ocsplen;
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TAILQ_ENTRY(vhost) vhosts;
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struct addrhead addrs;
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/*
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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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*/
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struct lochead locations;
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struct aliashead aliases;
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struct proxyhead proxies;
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};
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struct etm { /* extension to mime */
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char mime[MEDIATYPE_TYPEMAX];
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char ext[MEDIATYPE_NAMEMAX];
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};
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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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};
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TAILQ_HEAD(pkihead, pki);
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struct pki {
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char *hash;
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EVP_PKEY *pkey;
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TAILQ_ENTRY(pki) pkis;
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};
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struct conf {
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struct privsep *ps;
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uint32_t protos;
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struct mime mime;
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char chroot[PATH_MAX];
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char user[LOGIN_NAME_MAX];
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int prefork;
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int reload;
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int log_syslog;
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int log_facility;
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char *log_access;
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enum log_format log_format;
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int use_privsep_crypto;
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int conftest;
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struct fcgihead fcgi;
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struct vhosthead hosts;
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struct pkihead pkis;
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struct addrhead addrs;
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};
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extern const char *config_path;
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extern int servpipes[PROC_MAX_INSTANCES];
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extern int privsep_process;
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typedef void (imsg_handlerfn)(struct imsgbuf*, struct imsg*, size_t);
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enum {
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REQUEST_UNDECIDED,
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REQUEST_FILE,
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REQUEST_DIR,
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REQUEST_FCGI,
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REQUEST_PROXY,
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REQUEST_DONE,
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};
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struct client {
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struct conf *conf;
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struct address *addr;
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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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char rhost[NI_MAXHOST];
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char rserv[NI_MAXSERV];
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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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size_t soff;
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struct sockaddr_storage raddr;
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socklen_t raddrlen;
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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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};
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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 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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};
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enum imsg_type {
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IMSG_LOG_REQUEST,
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IMSG_LOG_ACCESS,
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IMSG_LOG_SYSLOG,
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IMSG_LOG_FACILITY,
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IMSG_RECONF_START,
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IMSG_RECONF_LOG_FMT,
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IMSG_RECONF_MIME,
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IMSG_RECONF_PROTOS,
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IMSG_RECONF_SOCK,
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IMSG_RECONF_FCGI,
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IMSG_RECONF_HOST,
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IMSG_RECONF_CERT,
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IMSG_RECONF_KEY,
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IMSG_RECONF_OCSP,
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IMSG_RECONF_HOST_ADDR,
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IMSG_RECONF_LOC,
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IMSG_RECONF_ENV,
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IMSG_RECONF_ALIAS,
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IMSG_RECONF_PROXY,
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IMSG_RECONF_PROXY_CERT,
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IMSG_RECONF_PROXY_KEY,
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IMSG_RECONF_END,
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IMSG_RECONF_DONE,
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IMSG_CRYPTO_RSA_PRIVENC,
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IMSG_CRYPTO_RSA_PRIVDEC,
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IMSG_CRYPTO_ECDSA_SIGN,
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IMSG_CTL_PROCFD,
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};
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/* gmid.c */
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char *data_dir(void);
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void load_local_cert(struct vhost*, const char*, const char*);
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/* gmid.c / ge.c */
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void log_request(struct client *, int, const char *);
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/* config.c */
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struct conf *config_new(void);
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void config_purge(struct conf *);
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int config_send(struct conf *);
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int config_recv(struct conf *, struct imsg *);
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int config_test(struct conf *);
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/* crypto.c */
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void crypto(struct privsep *, struct privsep_proc *);
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void crypto_engine_init(struct conf *);
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/* parse.y */
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void yyerror(const char*, ...);
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int parse_conf(struct conf *, const char*);
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int cmdline_symset(char *);
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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 conf *, 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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struct location *vhost_fastcgi(struct vhost*, const char*);
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int vhost_dirfd(struct vhost*, const char*, size_t*);
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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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int vhost_disable_log(struct vhost*, const char*);
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void mark_nonblock(int);
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void client_write(struct bufferevent *, void *);
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int start_reply(struct client*, int, const char*);
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void client_close(struct client *);
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void server_accept(int, short, void *);
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void server_init(struct privsep *, struct privsep_proc *, void *);
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int server_configure_done(struct conf *);
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void server(struct privsep *ps, struct privsep_proc *);
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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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/* 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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/* fcgi.c */
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void fcgi_read(struct bufferevent *, void *);
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void fcgi_write(struct bufferevent *, void *);
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void fcgi_error(struct bufferevent *, short, void *);
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void fcgi_req(struct client *, struct location *);
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/* sandbox.c */
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void sandbox_main_process(void);
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void sandbox_server_process(void);
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void sandbox_crypto_process(void);
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void sandbox_logger_process(void);
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/* utf8.c */
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int valid_multibyte_utf8(struct parser*);
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char *utf8_nth(char*, size_t);
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/* logger.c */
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void logger(struct privsep *, struct privsep_proc *);
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/* proxy.c */
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int proxy_init(struct client *);
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/* puny.c */
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int puny_decode(const char*, char*, size_t, const char**);
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/* utils.c */
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const char *strip_path(const char *, int);
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int ends_with(const char*, const char*);
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char *absolutify_path(const char*);
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char *xstrdup(const char*);
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void *xcalloc(size_t, size_t);
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void gencert(const char *, const char *, const char *, int);
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X509_STORE *load_ca(uint8_t *, size_t);
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int validate_against_ca(X509_STORE*, const uint8_t*, size_t);
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void ssl_error(const char *);
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char *ssl_pubkey_hash(const uint8_t *, size_t);
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EVP_PKEY *ssl_load_pkey(const uint8_t *, size_t);
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struct vhost *new_vhost(void);
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struct location *new_location(void);
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struct proxy *new_proxy(void);
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#endif
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