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 GEMINI_URL_LEN (1024+3) /* URL max len + \r\n + \0 */
44 #define TEMP_REDIRECT 30
45 #define TEMP_FAILURE 40
48 #define PROXY_REFUSED 53
49 #define BAD_REQUEST 59
50 #define CLIENT_CERT_REQ 60
51 #define CERT_NOT_AUTH 61
55 /* maximum hostname and label length, +1 for the NUL-terminator */
56 #define DOMAIN_NAME_LEN (253+1)
57 #define LABEL_LEN (63+1)
71 #define FCGI_INFLIGHT 1
75 extern struct fcgi fcgi[FCGI_MAX];
77 TAILQ_HEAD(lochead, location);
81 const char *default_mime;
83 int auto_index; /* 0 auto, -1 off, 1 on */
85 const char *block_fmt;
94 TAILQ_ENTRY(location) locations;
97 TAILQ_HEAD(envhead, envlist);
101 TAILQ_ENTRY(envlist) envs;
104 TAILQ_HEAD(aliashead, alist);
107 TAILQ_ENTRY(alist) aliases;
110 extern TAILQ_HEAD(vhosthead, vhost) hosts;
116 const char *entrypoint;
118 TAILQ_ENTRY(vhost) vhosts;
120 /* the first location rule is always '*' and holds the default
121 * settings for the vhost, then follows the "real" location
122 * rules as specified in the configuration. */
123 struct lochead locations;
126 struct aliashead aliases;
129 struct etm { /* extension to mime */
141 /* from command line */
155 extern const char *config_path;
156 extern struct conf conf;
158 extern struct imsgbuf logibuf, exibuf, servibuf[PROC_MAX];
160 extern int servpipes[PROC_MAX];
181 TAILQ_ENTRY(mbuf) mbufs;
184 TAILQ_HEAD(mbufhead, mbuf);
188 typedef void (imsg_handlerfn)(struct imsgbuf*, struct imsg*, size_t);
190 typedef void (*statefn)(int, short, void*);
193 * DFA: handle_handshake is the initial state, close_conn the final.
194 * Sometimes we have an enter_* function to handle the state switch.
196 * handle_handshake -> handle_open_conn
197 * handle_handshake -> close_conn // on err
199 * handle_open_conn -> handle_cgi_reply // via open_file/dir/...
200 * handle_open_conn -> send_fcgi_req // via apply_fastcgi, IMSG_FCGI_FD
201 * handle_open_conn -> handle_dirlist // ...same
202 * handle_open_conn -> send_file // ...same
203 * handle_open_conn -> start_reply // on error
205 * handle_cgi_reply -> handle_cgi // after logging the CGI reply
206 * handle_cgi_reply -> start_reply // on error
208 * handle_cgi -> close_conn
210 * send_fcgi_req -> copy_mbuf // via handle_fcgi
211 * handle_fcgi -> close_all // on error
212 * copy_mbuf -> close_conn // on success/error
214 * handle_dirlist -> send_directory_listing
215 * handle_dirlist -> close_conn // on error
217 * send_directory_listing -> close_conn
219 * send_file -> close_conn
224 char req[GEMINI_URL_LEN];
226 char domain[DOMAIN_NAME_LEN];
229 * start_reply uses this to know what function call after the
230 * reply. It's also used as sentinel value in fastcgi to know
231 * if the server has closed the request.
242 /* big enough to store STATUS + SPACE + META + CRLF */
246 struct mbufhead mbufhead;
248 struct sockaddr_storage addr;
249 struct vhost *host; /* host they're talking to */
252 extern struct client clients[MAX_USERS];
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. */
301 char *data_dir(void);
302 void load_local_cert(const char*, const char*);
303 void load_vhosts(void);
304 int make_socket(int, int);
305 void setup_tls(void);
306 void init_config(void);
307 void free_config(void);
308 void drop_priv(void);
310 /* provided by lex/yacc */
313 extern int yyparse(void);
314 extern int yylex(void);
316 void yyerror(const char*, ...);
317 int parse_portno(const char*);
318 void parse_conf(const char*);
321 void fatal(const char*, ...)
322 __attribute__((format (printf, 1, 2)))
323 __attribute__((__noreturn__));
325 #define LOG_ATTR_FMT __attribute__((format (printf, 2, 3)))
326 void log_err(struct client*, const char*, ...) LOG_ATTR_FMT;
327 void log_warn(struct client*, const char*, ...) LOG_ATTR_FMT;
328 void log_notice(struct client*, const char*, ...) LOG_ATTR_FMT;
329 void log_info(struct client*, const char*, ...) LOG_ATTR_FMT;
330 void log_debug(struct client*, const char*, ...) LOG_ATTR_FMT;
331 void log_request(struct client*, char*, size_t);
332 int logger_main(int, struct imsgbuf*);
335 void init_mime(struct mime*);
336 void add_mime(struct mime*, const char*, const char*);
337 void load_default_mime(struct mime*);
338 const char *mime(struct vhost*, const char*);
341 const char *vhost_lang(struct vhost*, const char*);
342 const char *vhost_default_mime(struct vhost*, const char*);
343 const char *vhost_index(struct vhost*, const char*);
344 int vhost_auto_index(struct vhost*, const char*);
345 int vhost_block_return(struct vhost*, const char*, int*, const char**);
346 int vhost_fastcgi(struct vhost*, const char*);
347 int vhost_dirfd(struct vhost*, const char*);
348 int vhost_strip(struct vhost*, const char*);
349 X509_STORE *vhost_require_ca(struct vhost*, const char*);
350 int vhost_disable_log(struct vhost*, const char*);
352 void mark_nonblock(int);
353 void start_reply(struct client*, int, const char*);
354 void close_conn(int, short, void*);
355 struct client *try_client_by_id(int);
356 void loop(struct tls*, int, int, struct imsgbuf*);
359 int scandir_fd(int, struct dirent***, int(*)(const struct dirent*),
360 int(*)(const struct dirent**, const struct dirent**));
361 int select_non_dot(const struct dirent*);
362 int select_non_dotdot(const struct dirent*);
365 int send_string(int, const char*);
366 int recv_string(int, char**);
367 int send_iri(int, struct iri*);
368 int recv_iri(int, struct iri*);
369 void free_recvd_iri(struct iri*);
370 int send_vhost(int, struct vhost*);
371 int recv_vhost(int, struct vhost**);
372 int send_time(int, time_t);
373 int recv_time(int, time_t*);
374 int send_fd(int, int);
376 int executor_main(struct imsgbuf*);
379 void handle_fcgi(int, short, void*);
380 void send_fcgi_req(struct fcgi*, struct client*);
383 void sandbox_server_process(void);
384 void sandbox_executor_process(void);
385 void sandbox_logger_process(void);
388 int valid_multibyte_utf8(struct parser*);
389 char *utf8_nth(char*, size_t);
392 int parse_iri(char*, struct iri*, const char**);
393 int trim_req_iri(char*, const char **);
394 int serialize_iri(struct iri*, char*, size_t);
395 char *pct_decode_str(char *);
398 int puny_decode(const char*, char*, size_t, const char**);
401 void block_signals(void);
402 void unblock_signals(void);
403 int starts_with(const char*, const char*);
404 int ends_with(const char*, const char*);
405 ssize_t filesize(int);
406 char *absolutify_path(const char*);
407 char *xstrdup(const char*);
408 void *xcalloc(size_t, size_t);
409 void gen_certificate(const char*, const char*, const char*);
410 X509_STORE *load_ca(const char*);
411 int validate_against_ca(X509_STORE*, const uint8_t*, size_t);
412 void dispatch_imsg(struct imsgbuf*, imsg_handlerfn**, size_t);