Blob
Date:
Wed Oct 5 15:10:44 2022 UTC
Message:
make the various strings in the config fixed-length will help in future restructuring to have fixed-size objects.
/*
* Copyright (c) 2020, 2021, 2022 Omar Polo <op@omarpolo.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef GMID_H
#define GMID_H
#include "config.h"
#include <sys/socket.h>
#include <sys/types.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <dirent.h>
#include <limits.h>
#include <netdb.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <tls.h>
#include <unistd.h>
#include <openssl/x509.h>
#if HAVE_EVENT2
# include <event2/event.h>
# include <event2/event_compat.h>
# include <event2/event_struct.h>
# include <event2/buffer.h>
# include <event2/buffer_compat.h>
# include <event2/bufferevent.h>
# include <event2/bufferevent_struct.h>
# include <event2/bufferevent_compat.h>
#else
# include <event.h>
#endif
#define VERSION_STR(n) n " " VERSION
#define GE_STRING VERSION_STR("ge")
#define GG_STRING VERSION_STR("gg")
#define GMID_STRING VERSION_STR("gmid")
#define GMID_VERSION "gmid/" VERSION
#define GEMINI_URL_LEN (1024+3) /* URL max len + \r\n + \0 */
#define SUCCESS 20
#define TEMP_REDIRECT 30
#define TEMP_FAILURE 40
#define CGI_ERROR 42
#define PROXY_ERROR 43
#define NOT_FOUND 51
#define PROXY_REFUSED 53
#define BAD_REQUEST 59
#define CLIENT_CERT_REQ 60
#define CERT_NOT_AUTH 61
/* maximum hostname and label length, +1 for the NUL-terminator */
#define DOMAIN_NAME_LEN (253+1)
#define LABEL_LEN (63+1)
#define MEDIATYPE_NAMEMAX 128 /* file name extension */
#define MEDIATYPE_TYPEMAX 128 /* length of type/subtype */
#define FCGI_NAME_MAX 511
#define FCGI_VAL_MAX 511
#define FCGI_MAX 32
#define PROC_MAX 16
struct iri {
char *schema;
char *host;
char *port;
uint16_t port_no;
char *path;
char *query;
char *fragment;
};
struct parser {
char *iri;
struct iri *parsed;
const char *err;
};
struct fcgi {
int id;
char path[PATH_MAX];
char port[32];
};
extern struct fcgi fcgi[FCGI_MAX];
TAILQ_HEAD(proxyhead, proxy);
struct proxy {
char match_proto[32];
char match_host[HOST_NAME_MAX + 1];
char match_port[32];
char host[HOST_NAME_MAX + 1];
char port[32];
char sni[HOST_NAME_MAX];
int notls;
uint32_t protocols;
int noverifyname;
uint8_t *cert;
size_t certlen;
uint8_t *key;
size_t keylen;
X509_STORE *reqca;
TAILQ_ENTRY(proxy) proxies;
};
TAILQ_HEAD(lochead, location);
struct location {
char match[128];
char lang[32];
char default_mime[MEDIATYPE_TYPEMAX];
char index[PATH_MAX];
int auto_index; /* 0 auto, -1 off, 1 on */
int block_code;
char block_fmt[GEMINI_URL_LEN];
int strip;
X509_STORE *reqca;
int disable_log;
int fcgi;
char dir[PATH_MAX];
int dirfd;
TAILQ_ENTRY(location) locations;
};
TAILQ_HEAD(envhead, envlist);
struct envlist {
char name[FCGI_NAME_MAX];
char value[FCGI_VAL_MAX];
TAILQ_ENTRY(envlist) envs;
};
TAILQ_HEAD(aliashead, alist);
struct alist {
char alias[HOST_NAME_MAX + 1];
TAILQ_ENTRY(alist) aliases;
};
extern TAILQ_HEAD(vhosthead, vhost) hosts;
struct vhost {
char domain[HOST_NAME_MAX + 1];
char cert[PATH_MAX];
char key[PATH_MAX];
char ocsp[PATH_MAX];
TAILQ_ENTRY(vhost) vhosts;
/*
* the first location rule is always '*' and holds the default
* settings for the vhost, then follows the "real" location
* rules as specified in the configuration.
*/
struct lochead locations;
struct envhead params;
struct aliashead aliases;
struct proxyhead proxies;
};
struct etm { /* extension to mime */
char mime[MEDIATYPE_TYPEMAX];
char ext[MEDIATYPE_NAMEMAX];
};
struct mime {
struct etm *t;
size_t len;
size_t cap;
};
struct conf {
/* from command line */
int foreground;
int verbose;
int can_open_sockets;
/* in the config */
int port;
int ipv6;
uint32_t protos;
struct mime mime;
char chroot[PATH_MAX];
char user[LOGIN_NAME_MAX];
int prefork;
};
extern const char *config_path;
extern struct conf conf;
extern struct imsgbuf logibuf, servibuf[PROC_MAX];
extern int servpipes[PROC_MAX];
typedef void (imsg_handlerfn)(struct imsgbuf*, struct imsg*, size_t);
enum {
REQUEST_UNDECIDED,
REQUEST_FILE,
REQUEST_DIR,
REQUEST_FCGI,
REQUEST_PROXY,
REQUEST_DONE,
};
#define IS_INTERNAL_REQUEST(x) \
(x) != REQUEST_FCGI && \
(x) != REQUEST_PROXY)
struct client {
uint32_t id;
struct tls *ctx;
char *req;
size_t reqlen;
struct iri iri;
char domain[DOMAIN_NAME_LEN];
struct bufferevent *bev;
int type;
struct bufferevent *cgibev;
struct proxy *proxy;
struct bufferevent *proxybev;
struct tls *proxyctx;
int proxyevset;
struct event proxyev;
char *header;
int code;
const char *meta;
int fd, pfd;
struct dirent **dir;
int dirlen, diroff;
/* big enough to store STATUS + SPACE + META + CRLF */
char sbuf[1029];
ssize_t len, off;
struct sockaddr_storage addr;
struct vhost *host; /* host they're talking to */
size_t loc; /* location matched */
SPLAY_ENTRY(client) entry;
};
SPLAY_HEAD(client_tree_id, client);
extern struct client_tree_id clients;
struct connreq {
char host[NI_MAXHOST];
char port[NI_MAXSERV];
int flag;
};
enum {
FILE_EXISTS,
FILE_DIRECTORY,
FILE_MISSING,
};
enum imsg_type {
IMSG_FCGI_REQ,
IMSG_FCGI_FD,
IMSG_CONN_REQ,
IMSG_CONN_FD,
IMSG_LOG,
IMSG_LOG_REQUEST,
IMSG_LOG_TYPE,
IMSG_QUIT,
};
/* gmid.c */
char *data_dir(void);
void load_local_cert(struct vhost*, const char*, const char*);
void load_vhosts(void);
int make_socket(int, int);
void setup_tls(void);
void init_config(void);
void free_config(void);
void drop_priv(void);
void yyerror(const char*, ...);
void parse_conf(const char*);
void print_conf(void);
int cmdline_symset(char *);
/* log.c */
void fatal(const char*, ...)
__attribute__((format (printf, 1, 2)))
__attribute__((__noreturn__));
#define LOG_ATTR_FMT __attribute__((format (printf, 2, 3)))
void log_err(struct client*, const char*, ...) LOG_ATTR_FMT;
void log_warn(struct client*, const char*, ...) LOG_ATTR_FMT;
void log_notice(struct client*, const char*, ...) LOG_ATTR_FMT;
void log_info(struct client*, const char*, ...) LOG_ATTR_FMT;
void log_debug(struct client*, const char*, ...) LOG_ATTR_FMT;
void log_request(struct client*, char*, size_t);
int logger_main(int, struct imsgbuf*);
/* mime.c */
void init_mime(struct mime*);
int add_mime(struct mime*, const char*, const char*);
int load_default_mime(struct mime*);
void sort_mime(struct mime *);
const char *mime(struct vhost*, const char*);
void free_mime(struct mime *);
/* server.c */
extern int shutting_down;
const char *vhost_lang(struct vhost*, const char*);
const char *vhost_default_mime(struct vhost*, const char*);
const char *vhost_index(struct vhost*, const char*);
int vhost_auto_index(struct vhost*, const char*);
int vhost_block_return(struct vhost*, const char*, int*, const char**);
int vhost_fastcgi(struct vhost*, const char*);
int vhost_dirfd(struct vhost*, const char*, size_t*);
int vhost_strip(struct vhost*, const char*);
X509_STORE *vhost_require_ca(struct vhost*, const char*);
int vhost_disable_log(struct vhost*, const char*);
void mark_nonblock(int);
void client_write(struct bufferevent *, void *);
void start_reply(struct client*, int, const char*);
void client_close(struct client *);
struct client *client_by_id(int);
void loop(struct tls*, int, int, struct imsgbuf*);
int client_tree_cmp(struct client *, struct client *);
SPLAY_PROTOTYPE(client_tree_id, client, entry, client_tree_cmp);
/* dirs.c */
int scandir_fd(int, struct dirent***, int(*)(const struct dirent*),
int(*)(const struct dirent**, const struct dirent**));
int select_non_dot(const struct dirent*);
int select_non_dotdot(const struct dirent*);
/* fcgi.c */
void fcgi_read(struct bufferevent *, void *);
void fcgi_write(struct bufferevent *, void *);
void fcgi_error(struct bufferevent *, short, void *);
void fcgi_req(struct client *);
/* sandbox.c */
void sandbox_server_process(int);
void sandbox_logger_process(void);
/* utf8.c */
int valid_multibyte_utf8(struct parser*);
char *utf8_nth(char*, size_t);
/* iri.c */
int parse_iri(char*, struct iri*, const char**);
int serialize_iri(struct iri*, char*, size_t);
int encode_path(char *, size_t, const char *);
char *pct_decode_str(char *);
/* proxy.c */
int proxy_init(struct client *);
/* puny.c */
int puny_decode(const char*, char*, size_t, const char**);
/* utils.c */
void block_signals(void);
void unblock_signals(void);
int starts_with(const char*, const char*);
int ends_with(const char*, const char*);
ssize_t filesize(int);
char *absolutify_path(const char*);
char *xstrdup(const char*);
void *xcalloc(size_t, size_t);
void gen_certificate(const char*, const char*, const char*);
X509_STORE *load_ca(const char*);
int validate_against_ca(X509_STORE*, const uint8_t*, size_t);
void dispatch_imsg(struct imsgbuf*, imsg_handlerfn**, size_t);
#endif
Omar Polo