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];
109 TAILQ_HEAD(lochead, location);
113 const char *default_mime;
115 int auto_index; /* 0 auto, -1 off, 1 on */
117 const char *block_fmt;
126 TAILQ_ENTRY(location) locations;
129 TAILQ_HEAD(envhead, envlist);
133 TAILQ_ENTRY(envlist) envs;
136 TAILQ_HEAD(aliashead, alist);
139 TAILQ_ENTRY(alist) aliases;
142 extern TAILQ_HEAD(vhosthead, vhost) hosts;
149 const char *entrypoint;
151 TAILQ_ENTRY(vhost) vhosts;
154 * the first location rule is always '*' and holds the default
155 * settings for the vhost, then follows the "real" location
156 * rules as specified in the configuration.
158 struct lochead locations;
161 struct envhead params;
162 struct aliashead aliases;
166 struct etm { /* extension to mime */
178 /* from command line */
192 extern const char *config_path;
193 extern struct conf conf;
195 extern struct imsgbuf logibuf, exibuf, servibuf[PROC_MAX];
197 extern int servpipes[PROC_MAX];
199 typedef void (imsg_handlerfn)(struct imsgbuf*, struct imsg*, size_t);
211 #define IS_INTERNAL_REQUEST(x) \
212 ((x) != REQUEST_CGI && \
213 (x) != REQUEST_FCGI && \
214 (x) != REQUEST_PROXY)
221 char domain[DOMAIN_NAME_LEN];
223 struct bufferevent *bev;
227 struct bufferevent *cgibev;
229 struct bufferevent *proxybev;
230 struct tls *proxyctx;
231 struct event proxyev;
241 /* big enough to store STATUS + SPACE + META + CRLF */
245 struct sockaddr_storage addr;
246 struct vhost *host; /* host they're talking to */
247 size_t loc; /* location matched */
249 SPLAY_ENTRY(client) entry;
251 SPLAY_HEAD(client_tree_id, client);
252 extern struct client_tree_id clients;
255 char buf[GEMINI_URL_LEN];
257 size_t iri_schema_off;
261 size_t iri_query_off;
262 size_t iri_fragment_off;
265 char spath[PATH_MAX+1];
266 char relpath[PATH_MAX+1];
267 char addr[NI_MAXHOST+1];
269 /* AFAIK there isn't an upper limit for these two fields. */
285 char host[NI_MAXHOST];
286 char port[NI_MAXSERV];
311 char *data_dir(void);
312 void load_local_cert(const char*, const char*);
313 void load_vhosts(void);
314 int make_socket(int, int);
315 void setup_tls(void);
316 void init_config(void);
317 void free_config(void);
318 void drop_priv(void);
320 void yyerror(const char*, ...);
321 void parse_conf(const char*);
322 void print_conf(void);
323 int cmdline_symset(char *);
326 void fatal(const char*, ...)
327 __attribute__((format (printf, 1, 2)))
328 __attribute__((__noreturn__));
330 #define LOG_ATTR_FMT __attribute__((format (printf, 2, 3)))
331 void log_err(struct client*, const char*, ...) LOG_ATTR_FMT;
332 void log_warn(struct client*, const char*, ...) LOG_ATTR_FMT;
333 void log_notice(struct client*, const char*, ...) LOG_ATTR_FMT;
334 void log_info(struct client*, const char*, ...) LOG_ATTR_FMT;
335 void log_debug(struct client*, const char*, ...) LOG_ATTR_FMT;
336 void log_request(struct client*, char*, size_t);
337 int logger_main(int, struct imsgbuf*);
340 void init_mime(struct mime*);
341 void add_mime(struct mime*, const char*, const char*);
342 void load_default_mime(struct mime*);
343 const char *mime(struct vhost*, const char*);
346 extern int shutting_down;
347 const char *vhost_lang(struct vhost*, const char*);
348 const char *vhost_default_mime(struct vhost*, const char*);
349 const char *vhost_index(struct vhost*, const char*);
350 int vhost_auto_index(struct vhost*, const char*);
351 int vhost_block_return(struct vhost*, const char*, int*, const char**);
352 int vhost_fastcgi(struct vhost*, const char*);
353 int vhost_dirfd(struct vhost*, const char*, size_t*);
354 int vhost_strip(struct vhost*, const char*);
355 X509_STORE *vhost_require_ca(struct vhost*, const char*);
356 int vhost_disable_log(struct vhost*, const char*);
358 void mark_nonblock(int);
359 void client_write(struct bufferevent *, void *);
360 void start_reply(struct client*, int, const char*);
361 void client_close(struct client *);
362 struct client *try_client_by_id(int);
363 void loop(struct tls*, int, int, struct imsgbuf*);
365 int client_tree_cmp(struct client *, struct client *);
366 SPLAY_PROTOTYPE(client_tree_id, client, entry, client_tree_cmp);
369 int scandir_fd(int, struct dirent***, int(*)(const struct dirent*),
370 int(*)(const struct dirent**, const struct dirent**));
371 int select_non_dot(const struct dirent*);
372 int select_non_dotdot(const struct dirent*);
375 int send_string(int, const char*);
376 int recv_string(int, char**);
377 int send_iri(int, struct iri*);
378 int recv_iri(int, struct iri*);
379 void free_recvd_iri(struct iri*);
380 int send_vhost(int, struct vhost*);
381 int recv_vhost(int, struct vhost**);
382 int send_time(int, time_t);
383 int recv_time(int, time_t*);
384 int send_fd(int, int);
386 int executor_main(struct imsgbuf*);
389 void fcgi_read(struct bufferevent *, void *);
390 void fcgi_write(struct bufferevent *, void *);
391 void fcgi_error(struct bufferevent *, short, void *);
392 void fcgi_req(struct client *);
395 void sandbox_server_process(void);
396 void sandbox_executor_process(void);
397 void sandbox_logger_process(void);
400 int valid_multibyte_utf8(struct parser*);
401 char *utf8_nth(char*, size_t);
404 int parse_iri(char*, struct iri*, const char**);
405 int serialize_iri(struct iri*, char*, size_t);
406 char *pct_decode_str(char *);
409 int proxy_init(struct client *);
412 int puny_decode(const char*, char*, size_t, const char**);
415 void block_signals(void);
416 void unblock_signals(void);
417 int starts_with(const char*, const char*);
418 int ends_with(const char*, const char*);
419 ssize_t filesize(int);
420 char *absolutify_path(const char*);
421 char *xstrdup(const char*);
422 void *xcalloc(size_t, size_t);
423 void gen_certificate(const char*, const char*, const char*);
424 X509_STORE *load_ca(const char*);
425 int validate_against_ca(X509_STORE*, const uint8_t*, size_t);
426 void dispatch_imsg(struct imsgbuf*, imsg_handlerfn**, size_t);