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)
98 extern struct fcgi fcgi[FCGI_MAX];
100 TAILQ_HEAD(proxyhead, proxy);
104 const char *match_port;
118 TAILQ_ENTRY(proxy) proxies;
121 TAILQ_HEAD(lochead, location);
125 const char *default_mime;
127 int auto_index; /* 0 auto, -1 off, 1 on */
129 const char *block_fmt;
138 TAILQ_ENTRY(location) locations;
141 TAILQ_HEAD(envhead, envlist);
145 TAILQ_ENTRY(envlist) envs;
148 TAILQ_HEAD(aliashead, alist);
151 TAILQ_ENTRY(alist) aliases;
154 extern TAILQ_HEAD(vhosthead, vhost) hosts;
161 const char *entrypoint;
163 TAILQ_ENTRY(vhost) vhosts;
166 * the first location rule is always '*' and holds the default
167 * settings for the vhost, then follows the "real" location
168 * rules as specified in the configuration.
170 struct lochead locations;
173 struct envhead params;
174 struct aliashead aliases;
175 struct proxyhead proxies;
178 struct etm { /* extension to mime */
190 /* from command line */
204 extern const char *config_path;
205 extern struct conf conf;
207 extern struct imsgbuf logibuf, exibuf, servibuf[PROC_MAX];
209 extern int servpipes[PROC_MAX];
211 typedef void (imsg_handlerfn)(struct imsgbuf*, struct imsg*, size_t);
223 #define IS_INTERNAL_REQUEST(x) \
224 ((x) != REQUEST_CGI && \
225 (x) != REQUEST_FCGI && \
226 (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 buf[GEMINI_URL_LEN];
271 size_t iri_schema_off;
275 size_t iri_query_off;
276 size_t iri_fragment_off;
279 char spath[PATH_MAX+1];
280 char relpath[PATH_MAX+1];
281 char addr[NI_MAXHOST+1];
283 /* AFAIK there isn't an upper limit for these two fields. */
299 char host[NI_MAXHOST];
300 char port[NI_MAXSERV];
325 char *data_dir(void);
326 void load_local_cert(const char*, const char*);
327 void load_vhosts(void);
328 int make_socket(int, int);
329 void setup_tls(void);
330 void init_config(void);
331 void free_config(void);
332 void drop_priv(void);
334 void yyerror(const char*, ...);
335 void parse_conf(const char*);
336 void print_conf(void);
337 int cmdline_symset(char *);
340 void fatal(const char*, ...)
341 __attribute__((format (printf, 1, 2)))
342 __attribute__((__noreturn__));
344 #define LOG_ATTR_FMT __attribute__((format (printf, 2, 3)))
345 void log_err(struct client*, const char*, ...) LOG_ATTR_FMT;
346 void log_warn(struct client*, const char*, ...) LOG_ATTR_FMT;
347 void log_notice(struct client*, const char*, ...) LOG_ATTR_FMT;
348 void log_info(struct client*, const char*, ...) LOG_ATTR_FMT;
349 void log_debug(struct client*, const char*, ...) LOG_ATTR_FMT;
350 void log_request(struct client*, char*, size_t);
351 int logger_main(int, struct imsgbuf*);
354 void init_mime(struct mime*);
355 void add_mime(struct mime*, const char*, const char*);
356 void load_default_mime(struct mime*);
357 const char *mime(struct vhost*, const char*);
360 extern int shutting_down;
361 const char *vhost_lang(struct vhost*, const char*);
362 const char *vhost_default_mime(struct vhost*, const char*);
363 const char *vhost_index(struct vhost*, const char*);
364 int vhost_auto_index(struct vhost*, const char*);
365 int vhost_block_return(struct vhost*, const char*, int*, const char**);
366 int vhost_fastcgi(struct vhost*, const char*);
367 int vhost_dirfd(struct vhost*, const char*, size_t*);
368 int vhost_strip(struct vhost*, const char*);
369 X509_STORE *vhost_require_ca(struct vhost*, const char*);
370 int vhost_disable_log(struct vhost*, const char*);
372 void mark_nonblock(int);
373 void client_write(struct bufferevent *, void *);
374 void start_reply(struct client*, int, const char*);
375 void client_close(struct client *);
376 struct client *try_client_by_id(int);
377 void loop(struct tls*, int, int, struct imsgbuf*);
379 int client_tree_cmp(struct client *, struct client *);
380 SPLAY_PROTOTYPE(client_tree_id, client, entry, client_tree_cmp);
383 int scandir_fd(int, struct dirent***, int(*)(const struct dirent*),
384 int(*)(const struct dirent**, const struct dirent**));
385 int select_non_dot(const struct dirent*);
386 int select_non_dotdot(const struct dirent*);
389 int send_string(int, const char*);
390 int recv_string(int, char**);
391 int send_iri(int, struct iri*);
392 int recv_iri(int, struct iri*);
393 void free_recvd_iri(struct iri*);
394 int send_vhost(int, struct vhost*);
395 int recv_vhost(int, struct vhost**);
396 int send_time(int, time_t);
397 int recv_time(int, time_t*);
398 int send_fd(int, int);
400 int executor_main(struct imsgbuf*);
403 void fcgi_read(struct bufferevent *, void *);
404 void fcgi_write(struct bufferevent *, void *);
405 void fcgi_error(struct bufferevent *, short, void *);
406 void fcgi_req(struct client *);
409 void sandbox_server_process(void);
410 void sandbox_executor_process(void);
411 void sandbox_logger_process(void);
414 int valid_multibyte_utf8(struct parser*);
415 char *utf8_nth(char*, size_t);
418 int parse_iri(char*, struct iri*, const char**);
419 int serialize_iri(struct iri*, char*, size_t);
420 char *pct_decode_str(char *);
423 int proxy_init(struct client *);
426 int puny_decode(const char*, char*, size_t, const char**);
429 void block_signals(void);
430 void unblock_signals(void);
431 int starts_with(const char*, const char*);
432 int ends_with(const char*, const char*);
433 ssize_t filesize(int);
434 char *absolutify_path(const char*);
435 char *xstrdup(const char*);
436 void *xcalloc(size_t, size_t);
437 void gen_certificate(const char*, const char*, const char*);
438 X509_STORE *load_ca(const char*);
439 int validate_against_ca(X509_STORE*, const uint8_t*, size_t);
440 void dispatch_imsg(struct imsgbuf*, imsg_handlerfn**, size_t);