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
68 /* maximum hostname and label length, +1 for the NUL-terminator */
69 #define DOMAIN_NAME_LEN (253+1)
70 #define LABEL_LEN (63+1)
81 extern struct fcgi fcgi[FCGI_MAX];
83 TAILQ_HEAD(lochead, location);
87 const char *default_mime;
89 int auto_index; /* 0 auto, -1 off, 1 on */
91 const char *block_fmt;
100 TAILQ_ENTRY(location) locations;
103 TAILQ_HEAD(envhead, envlist);
107 TAILQ_ENTRY(envlist) envs;
110 TAILQ_HEAD(aliashead, alist);
113 TAILQ_ENTRY(alist) aliases;
116 extern TAILQ_HEAD(vhosthead, vhost) hosts;
122 const char *entrypoint;
124 TAILQ_ENTRY(vhost) vhosts;
127 * the first location rule is always '*' and holds the default
128 * settings for the vhost, then follows the "real" location
129 * rules as specified in the configuration.
131 struct lochead locations;
134 struct envhead params;
135 struct aliashead aliases;
138 struct etm { /* extension to mime */
150 /* from command line */
164 extern const char *config_path;
165 extern struct conf conf;
167 extern struct imsgbuf logibuf, exibuf, servibuf[PROC_MAX];
169 extern int servpipes[PROC_MAX];
187 typedef void (imsg_handlerfn)(struct imsgbuf*, struct imsg*, size_t);
198 #define IS_INTERNAL_REQUEST(x) ((x) != REQUEST_CGI && (x) != REQUEST_FCGI)
205 char domain[DOMAIN_NAME_LEN];
207 struct bufferevent *bev;
211 struct bufferevent *cgibev;
221 /* big enough to store STATUS + SPACE + META + CRLF */
225 struct sockaddr_storage addr;
226 struct vhost *host; /* host they're talking to */
227 size_t loc; /* location matched */
229 SPLAY_ENTRY(client) entry;
231 SPLAY_HEAD(client_tree_id, client);
232 extern struct client_tree_id clients;
235 char buf[GEMINI_URL_LEN];
237 size_t iri_schema_off;
241 size_t iri_query_off;
242 size_t iri_fragment_off;
245 char spath[PATH_MAX+1];
246 char relpath[PATH_MAX+1];
247 char addr[NI_MAXHOST+1];
249 /* AFAIK there isn't an upper limit for these two fields. */
283 char *data_dir(void);
284 void load_local_cert(const char*, const char*);
285 void load_vhosts(void);
286 int make_socket(int, int);
287 void setup_tls(void);
288 void init_config(void);
289 void free_config(void);
290 void drop_priv(void);
292 void yyerror(const char*, ...);
293 void parse_conf(const char*);
294 void print_conf(void);
295 int cmdline_symset(char *);
298 void fatal(const char*, ...)
299 __attribute__((format (printf, 1, 2)))
300 __attribute__((__noreturn__));
302 #define LOG_ATTR_FMT __attribute__((format (printf, 2, 3)))
303 void log_err(struct client*, const char*, ...) LOG_ATTR_FMT;
304 void log_warn(struct client*, const char*, ...) LOG_ATTR_FMT;
305 void log_notice(struct client*, const char*, ...) LOG_ATTR_FMT;
306 void log_info(struct client*, const char*, ...) LOG_ATTR_FMT;
307 void log_debug(struct client*, const char*, ...) LOG_ATTR_FMT;
308 void log_request(struct client*, char*, size_t);
309 int logger_main(int, struct imsgbuf*);
312 void init_mime(struct mime*);
313 void add_mime(struct mime*, const char*, const char*);
314 void load_default_mime(struct mime*);
315 const char *mime(struct vhost*, const char*);
318 extern int shutting_down;
319 const char *vhost_lang(struct vhost*, const char*);
320 const char *vhost_default_mime(struct vhost*, const char*);
321 const char *vhost_index(struct vhost*, const char*);
322 int vhost_auto_index(struct vhost*, const char*);
323 int vhost_block_return(struct vhost*, const char*, int*, const char**);
324 int vhost_fastcgi(struct vhost*, const char*);
325 int vhost_dirfd(struct vhost*, const char*, size_t*);
326 int vhost_strip(struct vhost*, const char*);
327 X509_STORE *vhost_require_ca(struct vhost*, const char*);
328 int vhost_disable_log(struct vhost*, const char*);
330 void mark_nonblock(int);
331 void client_write(struct bufferevent *, void *);
332 void start_reply(struct client*, int, const char*);
333 void client_close(struct client *);
334 struct client *try_client_by_id(int);
335 void loop(struct tls*, int, int, struct imsgbuf*);
337 int client_tree_cmp(struct client *, struct client *);
338 SPLAY_PROTOTYPE(client_tree_id, client, entry, client_tree_cmp);
341 int scandir_fd(int, struct dirent***, int(*)(const struct dirent*),
342 int(*)(const struct dirent**, const struct dirent**));
343 int select_non_dot(const struct dirent*);
344 int select_non_dotdot(const struct dirent*);
347 int send_string(int, const char*);
348 int recv_string(int, char**);
349 int send_iri(int, struct iri*);
350 int recv_iri(int, struct iri*);
351 void free_recvd_iri(struct iri*);
352 int send_vhost(int, struct vhost*);
353 int recv_vhost(int, struct vhost**);
354 int send_time(int, time_t);
355 int recv_time(int, time_t*);
356 int send_fd(int, int);
358 int executor_main(struct imsgbuf*);
361 void fcgi_read(struct bufferevent *, void *);
362 void fcgi_write(struct bufferevent *, void *);
363 void fcgi_error(struct bufferevent *, short, void *);
364 void fcgi_req(struct client *);
367 void sandbox_server_process(void);
368 void sandbox_executor_process(void);
369 void sandbox_logger_process(void);
372 int valid_multibyte_utf8(struct parser*);
373 char *utf8_nth(char*, size_t);
376 int parse_iri(char*, struct iri*, const char**);
377 int serialize_iri(struct iri*, char*, size_t);
378 char *pct_decode_str(char *);
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);