2 * Copyright (c) 2020 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
63 #define PROXY_REFUSED 53
64 #define BAD_REQUEST 59
65 #define CLIENT_CERT_REQ 60
66 #define CERT_NOT_AUTH 61
70 /* maximum hostname and label length, +1 for the NUL-terminator */
71 #define DOMAIN_NAME_LEN (253+1)
72 #define LABEL_LEN (63+1)
84 struct bufferevent *bev;
86 /* number of pending clients */
90 #define FCGI_INFLIGHT 1
94 extern struct fcgi fcgi[FCGI_MAX];
96 TAILQ_HEAD(lochead, location);
100 const char *default_mime;
102 int auto_index; /* 0 auto, -1 off, 1 on */
104 const char *block_fmt;
113 TAILQ_ENTRY(location) locations;
116 TAILQ_HEAD(envhead, envlist);
120 TAILQ_ENTRY(envlist) envs;
123 TAILQ_HEAD(aliashead, alist);
126 TAILQ_ENTRY(alist) aliases;
129 extern TAILQ_HEAD(vhosthead, vhost) hosts;
135 const char *entrypoint;
137 TAILQ_ENTRY(vhost) vhosts;
140 * the first location rule is always '*' and holds the default
141 * settings for the vhost, then follows the "real" location
142 * rules as specified in the configuration.
144 struct lochead locations;
147 struct envhead params;
148 struct aliashead aliases;
151 struct etm { /* extension to mime */
163 /* from command line */
177 extern const char *config_path;
178 extern struct conf conf;
180 extern struct imsgbuf logibuf, exibuf, servibuf[PROC_MAX];
182 extern int servpipes[PROC_MAX];
200 typedef void (imsg_handlerfn)(struct imsgbuf*, struct imsg*, size_t);
211 #define IS_INTERNAL_REQUEST(x) ((x) != REQUEST_CGI && (x) != REQUEST_FCGI)
218 char domain[DOMAIN_NAME_LEN];
220 struct bufferevent *bev;
224 struct bufferevent *cgibev;
235 /* big enough to store STATUS + SPACE + META + CRLF */
239 struct sockaddr_storage addr;
240 struct vhost *host; /* host they're talking to */
241 size_t loc; /* location matched */
244 extern struct client clients[MAX_USERS];
247 char buf[GEMINI_URL_LEN];
249 size_t iri_schema_off;
253 size_t iri_query_off;
254 size_t iri_fragment_off;
257 char spath[PATH_MAX+1];
258 char relpath[PATH_MAX+1];
259 char addr[NI_MAXHOST+1];
261 /* AFAIK there isn't an upper limit for these two fields. */
295 char *data_dir(void);
296 void load_local_cert(const char*, const char*);
297 void load_vhosts(void);
298 int make_socket(int, int);
299 void setup_tls(void);
300 void init_config(void);
301 void free_config(void);
302 void drop_priv(void);
304 void yyerror(const char*, ...);
305 void parse_conf(const char*);
306 int cmdline_symset(char *);
309 void fatal(const char*, ...)
310 __attribute__((format (printf, 1, 2)))
311 __attribute__((__noreturn__));
313 #define LOG_ATTR_FMT __attribute__((format (printf, 2, 3)))
314 void log_err(struct client*, const char*, ...) LOG_ATTR_FMT;
315 void log_warn(struct client*, const char*, ...) LOG_ATTR_FMT;
316 void log_notice(struct client*, const char*, ...) LOG_ATTR_FMT;
317 void log_info(struct client*, const char*, ...) LOG_ATTR_FMT;
318 void log_debug(struct client*, const char*, ...) LOG_ATTR_FMT;
319 void log_request(struct client*, char*, size_t);
320 int logger_main(int, struct imsgbuf*);
323 void init_mime(struct mime*);
324 void add_mime(struct mime*, const char*, const char*);
325 void load_default_mime(struct mime*);
326 const char *mime(struct vhost*, const char*);
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 *try_client_by_id(int);
346 void loop(struct tls*, int, int, struct imsgbuf*);
349 int scandir_fd(int, struct dirent***, int(*)(const struct dirent*),
350 int(*)(const struct dirent**, const struct dirent**));
351 int select_non_dot(const struct dirent*);
352 int select_non_dotdot(const struct dirent*);
355 int send_string(int, const char*);
356 int recv_string(int, char**);
357 int send_iri(int, struct iri*);
358 int recv_iri(int, struct iri*);
359 void free_recvd_iri(struct iri*);
360 int send_vhost(int, struct vhost*);
361 int recv_vhost(int, struct vhost**);
362 int send_time(int, time_t);
363 int recv_time(int, time_t*);
364 int send_fd(int, int);
366 int executor_main(struct imsgbuf*);
369 void fcgi_abort_request(struct client *);
370 void fcgi_close_backend(struct fcgi *);
371 void fcgi_read(struct bufferevent *, void *);
372 void fcgi_write(struct bufferevent *, void *);
373 void fcgi_error(struct bufferevent *, short, void *);
374 void fcgi_req(struct fcgi *, struct client *);
377 void sandbox_server_process(void);
378 void sandbox_executor_process(void);
379 void sandbox_logger_process(void);
382 int valid_multibyte_utf8(struct parser*);
383 char *utf8_nth(char*, size_t);
386 int parse_iri(char*, struct iri*, const char**);
387 int serialize_iri(struct iri*, char*, size_t);
388 char *pct_decode_str(char *);
391 int puny_decode(const char*, char*, size_t, const char**);
394 void block_signals(void);
395 void unblock_signals(void);
396 int starts_with(const char*, const char*);
397 int ends_with(const char*, const char*);
398 ssize_t filesize(int);
399 char *absolutify_path(const char*);
400 char *xstrdup(const char*);
401 void *xcalloc(size_t, size_t);
402 void gen_certificate(const char*, const char*, const char*);
403 X509_STORE *load_ca(const char*);
404 int validate_against_ca(X509_STORE*, const uint8_t*, size_t);
405 void dispatch_imsg(struct imsgbuf*, imsg_handlerfn**, size_t);