2 * Copyright (c) 2020, 2021, 2022 Omar Polo <op@omarpolo.com>
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
22 #include <sys/socket.h>
23 #include <sys/types.h>
25 #include <arpa/inet.h>
26 #include <netinet/in.h>
38 #include <openssl/x509.h>
41 # include <event2/event.h>
42 # include <event2/event_compat.h>
43 # include <event2/event_struct.h>
44 # include <event2/buffer.h>
45 # include <event2/buffer_compat.h>
46 # include <event2/bufferevent.h>
47 # include <event2/bufferevent_struct.h>
48 # include <event2/bufferevent_compat.h>
53 #define GMID_STRING "gmid " VERSION
54 #define GMID_VERSION "gmid/" VERSION
56 #define GEMINI_URL_LEN (1024+3) /* URL max len + \r\n + \0 */
59 #define TEMP_REDIRECT 30
60 #define TEMP_FAILURE 40
62 #define PROXY_ERROR 43
64 #define PROXY_REFUSED 53
65 #define BAD_REQUEST 59
66 #define CLIENT_CERT_REQ 60
67 #define CERT_NOT_AUTH 61
69 /* maximum hostname and label length, +1 for the NUL-terminator */
70 #define DOMAIN_NAME_LEN (253+1)
71 #define LABEL_LEN (63+1)
73 #define MEDIATYPE_NAMEMAX 128 /* file name extension */
74 #define MEDIATYPE_TYPEMAX 128 /* length of type/subtype */
101 extern struct fcgi fcgi[FCGI_MAX];
103 TAILQ_HEAD(proxyhead, proxy);
107 const char *match_port;
121 TAILQ_ENTRY(proxy) proxies;
124 TAILQ_HEAD(lochead, location);
128 const char *default_mime;
130 int auto_index; /* 0 auto, -1 off, 1 on */
132 const char *block_fmt;
141 TAILQ_ENTRY(location) locations;
144 TAILQ_HEAD(envhead, envlist);
148 TAILQ_ENTRY(envlist) envs;
151 TAILQ_HEAD(aliashead, alist);
154 TAILQ_ENTRY(alist) aliases;
157 extern TAILQ_HEAD(vhosthead, vhost) hosts;
164 TAILQ_ENTRY(vhost) vhosts;
167 * the first location rule is always '*' and holds the default
168 * settings for the vhost, then follows the "real" location
169 * rules as specified in the configuration.
171 struct lochead locations;
173 struct envhead params;
174 struct aliashead aliases;
175 struct proxyhead proxies;
178 struct etm { /* extension to mime */
179 char mime[MEDIATYPE_TYPEMAX];
180 char ext[MEDIATYPE_NAMEMAX];
190 /* from command line */
193 int can_open_sockets;
200 char chroot[PATH_MAX];
201 char user[LOGIN_NAME_MAX];
205 extern const char *config_path;
206 extern struct conf conf;
208 extern struct imsgbuf logibuf, servibuf[PROC_MAX];
210 extern int servpipes[PROC_MAX];
212 typedef void (imsg_handlerfn)(struct imsgbuf*, struct imsg*, size_t);
223 #define IS_INTERNAL_REQUEST(x) \
224 (x) != REQUEST_FCGI && \
225 (x) != REQUEST_PROXY)
233 char domain[DOMAIN_NAME_LEN];
235 struct bufferevent *bev;
239 struct bufferevent *cgibev;
242 struct bufferevent *proxybev;
243 struct tls *proxyctx;
245 struct event proxyev;
255 /* big enough to store STATUS + SPACE + META + CRLF */
259 struct sockaddr_storage addr;
260 struct vhost *host; /* host they're talking to */
261 size_t loc; /* location matched */
263 SPLAY_ENTRY(client) entry;
265 SPLAY_HEAD(client_tree_id, client);
266 extern struct client_tree_id clients;
269 char host[NI_MAXHOST];
270 char port[NI_MAXSERV];
292 char *data_dir(void);
293 void load_local_cert(struct vhost*, const char*, const char*);
294 void load_vhosts(void);
295 int make_socket(int, int);
296 void setup_tls(void);
297 void init_config(void);
298 void free_config(void);
299 void drop_priv(void);
301 void yyerror(const char*, ...);
302 void parse_conf(const char*);
303 void print_conf(void);
304 int cmdline_symset(char *);
307 void fatal(const char*, ...)
308 __attribute__((format (printf, 1, 2)))
309 __attribute__((__noreturn__));
311 #define LOG_ATTR_FMT __attribute__((format (printf, 2, 3)))
312 void log_err(struct client*, const char*, ...) LOG_ATTR_FMT;
313 void log_warn(struct client*, const char*, ...) LOG_ATTR_FMT;
314 void log_notice(struct client*, const char*, ...) LOG_ATTR_FMT;
315 void log_info(struct client*, const char*, ...) LOG_ATTR_FMT;
316 void log_debug(struct client*, const char*, ...) LOG_ATTR_FMT;
317 void log_request(struct client*, char*, size_t);
318 int logger_main(int, struct imsgbuf*);
321 void init_mime(struct mime*);
322 int add_mime(struct mime*, const char*, const char*);
323 int load_default_mime(struct mime*);
324 void sort_mime(struct mime *);
325 const char *mime(struct vhost*, const char*);
326 void free_mime(struct mime *);
329 extern int shutting_down;
330 const char *vhost_lang(struct vhost*, const char*);
331 const char *vhost_default_mime(struct vhost*, const char*);
332 const char *vhost_index(struct vhost*, const char*);
333 int vhost_auto_index(struct vhost*, const char*);
334 int vhost_block_return(struct vhost*, const char*, int*, const char**);
335 int vhost_fastcgi(struct vhost*, const char*);
336 int vhost_dirfd(struct vhost*, const char*, size_t*);
337 int vhost_strip(struct vhost*, const char*);
338 X509_STORE *vhost_require_ca(struct vhost*, const char*);
339 int vhost_disable_log(struct vhost*, const char*);
341 void mark_nonblock(int);
342 void client_write(struct bufferevent *, void *);
343 void start_reply(struct client*, int, const char*);
344 void client_close(struct client *);
345 struct client *client_by_id(int);
346 void loop(struct tls*, int, int, struct imsgbuf*);
348 int client_tree_cmp(struct client *, struct client *);
349 SPLAY_PROTOTYPE(client_tree_id, client, entry, client_tree_cmp);
352 int scandir_fd(int, struct dirent***, int(*)(const struct dirent*),
353 int(*)(const struct dirent**, const struct dirent**));
354 int select_non_dot(const struct dirent*);
355 int select_non_dotdot(const struct dirent*);
358 void fcgi_read(struct bufferevent *, void *);
359 void fcgi_write(struct bufferevent *, void *);
360 void fcgi_error(struct bufferevent *, short, void *);
361 void fcgi_req(struct client *);
364 void sandbox_server_process(int);
365 void sandbox_logger_process(void);
368 int valid_multibyte_utf8(struct parser*);
369 char *utf8_nth(char*, size_t);
372 int parse_iri(char*, struct iri*, const char**);
373 int serialize_iri(struct iri*, char*, size_t);
374 int encode_path(char *, size_t, const char *);
375 char *pct_decode_str(char *);
378 int proxy_init(struct client *);
381 int puny_decode(const char*, char*, size_t, const char**);
384 void block_signals(void);
385 void unblock_signals(void);
386 int starts_with(const char*, const char*);
387 int ends_with(const char*, const char*);
388 ssize_t filesize(int);
389 char *absolutify_path(const char*);
390 char *xstrdup(const char*);
391 void *xcalloc(size_t, size_t);
392 void gen_certificate(const char*, const char*, const char*);
393 X509_STORE *load_ca(const char*);
394 int validate_against_ca(X509_STORE*, const uint8_t*, size_t);
395 void dispatch_imsg(struct imsgbuf*, imsg_handlerfn**, size_t);