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>
39 #include <openssl/x509.h>
41 #define GMID_STRING "gmid " VERSION
42 #define GMID_VERSION "gmid/" VERSION
44 #define GEMINI_URL_LEN (1024+3) /* URL max len + \r\n + \0 */
47 #define TEMP_REDIRECT 30
48 #define TEMP_FAILURE 40
51 #define PROXY_REFUSED 53
52 #define BAD_REQUEST 59
53 #define CLIENT_CERT_REQ 60
54 #define CERT_NOT_AUTH 61
58 /* maximum hostname and label length, +1 for the NUL-terminator */
59 #define DOMAIN_NAME_LEN (253+1)
60 #define LABEL_LEN (63+1)
72 struct bufferevent *bev;
74 /* number of pending clients */
78 #define FCGI_INFLIGHT 1
82 extern struct fcgi fcgi[FCGI_MAX];
84 TAILQ_HEAD(lochead, location);
88 const char *default_mime;
90 int auto_index; /* 0 auto, -1 off, 1 on */
92 const char *block_fmt;
101 TAILQ_ENTRY(location) locations;
104 TAILQ_HEAD(envhead, envlist);
108 TAILQ_ENTRY(envlist) envs;
111 TAILQ_HEAD(aliashead, alist);
114 TAILQ_ENTRY(alist) aliases;
117 extern TAILQ_HEAD(vhosthead, vhost) hosts;
123 const char *entrypoint;
125 TAILQ_ENTRY(vhost) vhosts;
128 * the first location rule is always '*' and holds the default
129 * settings for the vhost, then follows the "real" location
130 * rules as specified in the configuration.
132 struct lochead locations;
135 struct envhead params;
136 struct aliashead aliases;
139 struct etm { /* extension to mime */
151 /* from command line */
165 extern const char *config_path;
166 extern struct conf conf;
168 extern struct imsgbuf logibuf, exibuf, servibuf[PROC_MAX];
170 extern int servpipes[PROC_MAX];
191 TAILQ_ENTRY(mbuf) mbufs;
194 TAILQ_HEAD(mbufhead, mbuf);
196 typedef void (imsg_handlerfn)(struct imsgbuf*, struct imsg*, size_t);
198 typedef void (*statefn)(int, short, void*);
201 * DFA: handle_handshake is the initial state, close_conn the final.
202 * Sometimes we have an enter_* function to handle the state switch.
204 * handle_handshake -> handle_open_conn
205 * handle_handshake -> close_conn // on err
207 * handle_open_conn -> handle_cgi_reply // via open_file/dir/...
208 * handle_open_conn -> send_fcgi_req // via apply_fastcgi, IMSG_FCGI_FD
209 * handle_open_conn -> handle_dirlist // ...same
210 * handle_open_conn -> send_file // ...same
211 * handle_open_conn -> start_reply // on error
213 * handle_cgi_reply -> handle_cgi // after logging the CGI reply
214 * handle_cgi_reply -> start_reply // on error
216 * handle_cgi -> close_conn
218 * send_fcgi_req -> copy_mbuf // via handle_fcgi
219 * handle_fcgi -> close_all // on error
220 * copy_mbuf -> close_conn // on success/error
222 * handle_dirlist -> send_directory_listing
223 * handle_dirlist -> close_conn // on error
225 * send_directory_listing -> close_conn
227 * send_file -> close_conn
232 char req[GEMINI_URL_LEN];
234 char domain[DOMAIN_NAME_LEN];
237 * start_reply uses this to know what function call after the
238 * reply. It's also used as sentinel value in fastcgi to know
239 * if the server has closed the request.
250 /* big enough to store STATUS + SPACE + META + CRLF */
254 struct mbufhead mbufhead;
256 struct sockaddr_storage addr;
257 struct vhost *host; /* host they're talking to */
258 size_t loc; /* location matched */
261 extern struct client clients[MAX_USERS];
264 char buf[GEMINI_URL_LEN];
266 size_t iri_schema_off;
270 size_t iri_query_off;
271 size_t iri_fragment_off;
274 char spath[PATH_MAX+1];
275 char relpath[PATH_MAX+1];
276 char addr[NI_MAXHOST+1];
278 /* AFAIK there isn't an upper limit for these two fields. */
312 char *data_dir(void);
313 void load_local_cert(const char*, const char*);
314 void load_vhosts(void);
315 int make_socket(int, int);
316 void setup_tls(void);
317 void init_config(void);
318 void free_config(void);
319 void drop_priv(void);
321 void yyerror(const char*, ...);
322 void parse_conf(const char*);
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 start_reply(struct client*, int, const char*);
360 void close_conn(int, short, void*);
361 struct client *try_client_by_id(int);
362 void loop(struct tls*, int, int, struct imsgbuf*);
365 int scandir_fd(int, struct dirent***, int(*)(const struct dirent*),
366 int(*)(const struct dirent**, const struct dirent**));
367 int select_non_dot(const struct dirent*);
368 int select_non_dotdot(const struct dirent*);
371 int send_string(int, const char*);
372 int recv_string(int, char**);
373 int send_iri(int, struct iri*);
374 int recv_iri(int, struct iri*);
375 void free_recvd_iri(struct iri*);
376 int send_vhost(int, struct vhost*);
377 int recv_vhost(int, struct vhost**);
378 int send_time(int, time_t);
379 int recv_time(int, time_t*);
380 int send_fd(int, int);
382 int executor_main(struct imsgbuf*);
385 void fcgi_close_backend(struct fcgi *);
386 void fcgi_read(struct bufferevent *, void *);
387 void fcgi_write(struct bufferevent *, void *);
388 void fcgi_error(struct bufferevent *, short, void *);
389 void fcgi_req(struct fcgi *, struct client *);
392 void sandbox_server_process(void);
393 void sandbox_executor_process(void);
394 void sandbox_logger_process(void);
397 int valid_multibyte_utf8(struct parser*);
398 char *utf8_nth(char*, size_t);
401 int parse_iri(char*, struct iri*, const char**);
402 int trim_req_iri(char*, const char **);
403 int serialize_iri(struct iri*, char*, size_t);
404 char *pct_decode_str(char *);
407 int puny_decode(const char*, char*, size_t, const char**);
410 void block_signals(void);
411 void unblock_signals(void);
412 int starts_with(const char*, const char*);
413 int ends_with(const char*, const char*);
414 ssize_t filesize(int);
415 char *absolutify_path(const char*);
416 char *xstrdup(const char*);
417 void *xcalloc(size_t, size_t);
418 void gen_certificate(const char*, const char*, const char*);
419 X509_STORE *load_ca(const char*);
420 int validate_against_ca(X509_STORE*, const uint8_t*, size_t);
421 void dispatch_imsg(struct imsgbuf*, imsg_handlerfn**, size_t);