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_VERSION "gmid/1.7"
43 #define GEMINI_URL_LEN (1024+3) /* URL max len + \r\n + \0 */
46 #define TEMP_REDIRECT 30
47 #define TEMP_FAILURE 40
50 #define PROXY_REFUSED 53
51 #define BAD_REQUEST 59
52 #define CLIENT_CERT_REQ 60
53 #define CERT_NOT_AUTH 61
57 /* maximum hostname and label length, +1 for the NUL-terminator */
58 #define DOMAIN_NAME_LEN (253+1)
59 #define LABEL_LEN (63+1)
73 #define FCGI_INFLIGHT 1
77 extern struct fcgi fcgi[FCGI_MAX];
79 TAILQ_HEAD(lochead, location);
83 const char *default_mime;
85 int auto_index; /* 0 auto, -1 off, 1 on */
87 const char *block_fmt;
96 TAILQ_ENTRY(location) locations;
99 TAILQ_HEAD(envhead, envlist);
103 TAILQ_ENTRY(envlist) envs;
106 TAILQ_HEAD(aliashead, alist);
109 TAILQ_ENTRY(alist) aliases;
112 extern TAILQ_HEAD(vhosthead, vhost) hosts;
118 const char *entrypoint;
120 TAILQ_ENTRY(vhost) vhosts;
122 /* the first location rule is always '*' and holds the default
123 * settings for the vhost, then follows the "real" location
124 * rules as specified in the configuration. */
125 struct lochead locations;
128 struct envhead params;
129 struct aliashead aliases;
132 struct etm { /* extension to mime */
144 /* from command line */
158 extern const char *config_path;
159 extern struct conf conf;
161 extern struct imsgbuf logibuf, exibuf, servibuf[PROC_MAX];
163 extern int servpipes[PROC_MAX];
184 TAILQ_ENTRY(mbuf) mbufs;
187 TAILQ_HEAD(mbufhead, mbuf);
189 typedef void (imsg_handlerfn)(struct imsgbuf*, struct imsg*, size_t);
191 typedef void (*statefn)(int, short, void*);
194 * DFA: handle_handshake is the initial state, close_conn the final.
195 * Sometimes we have an enter_* function to handle the state switch.
197 * handle_handshake -> handle_open_conn
198 * handle_handshake -> close_conn // on err
200 * handle_open_conn -> handle_cgi_reply // via open_file/dir/...
201 * handle_open_conn -> send_fcgi_req // via apply_fastcgi, IMSG_FCGI_FD
202 * handle_open_conn -> handle_dirlist // ...same
203 * handle_open_conn -> send_file // ...same
204 * handle_open_conn -> start_reply // on error
206 * handle_cgi_reply -> handle_cgi // after logging the CGI reply
207 * handle_cgi_reply -> start_reply // on error
209 * handle_cgi -> close_conn
211 * send_fcgi_req -> copy_mbuf // via handle_fcgi
212 * handle_fcgi -> close_all // on error
213 * copy_mbuf -> close_conn // on success/error
215 * handle_dirlist -> send_directory_listing
216 * handle_dirlist -> close_conn // on error
218 * send_directory_listing -> close_conn
220 * send_file -> close_conn
225 char req[GEMINI_URL_LEN];
227 char domain[DOMAIN_NAME_LEN];
230 * start_reply uses this to know what function call after the
231 * reply. It's also used as sentinel value in fastcgi to know
232 * if the server has closed the request.
243 /* big enough to store STATUS + SPACE + META + CRLF */
247 struct mbufhead mbufhead;
249 struct sockaddr_storage addr;
250 struct vhost *host; /* host they're talking to */
251 size_t loc; /* location matched */
254 extern struct client clients[MAX_USERS];
257 char buf[GEMINI_URL_LEN];
259 size_t iri_schema_off;
263 size_t iri_query_off;
264 size_t iri_fragment_off;
267 char spath[PATH_MAX+1];
268 char relpath[PATH_MAX+1];
269 char addr[NI_MAXHOST+1];
271 /* AFAIK there isn't an upper limit for these two fields. */
303 char *data_dir(void);
304 void load_local_cert(const char*, const char*);
305 void load_vhosts(void);
306 int make_socket(int, int);
307 void setup_tls(void);
308 void init_config(void);
309 void free_config(void);
310 void drop_priv(void);
312 /* provided by lex/yacc */
315 extern int yyparse(void);
316 extern int yylex(void);
318 void yyerror(const char*, ...);
319 int parse_portno(const char*);
320 void parse_conf(const char*);
323 void fatal(const char*, ...)
324 __attribute__((format (printf, 1, 2)))
325 __attribute__((__noreturn__));
327 #define LOG_ATTR_FMT __attribute__((format (printf, 2, 3)))
328 void log_err(struct client*, const char*, ...) LOG_ATTR_FMT;
329 void log_warn(struct client*, const char*, ...) LOG_ATTR_FMT;
330 void log_notice(struct client*, const char*, ...) LOG_ATTR_FMT;
331 void log_info(struct client*, const char*, ...) LOG_ATTR_FMT;
332 void log_debug(struct client*, const char*, ...) LOG_ATTR_FMT;
333 void log_request(struct client*, char*, size_t);
334 int logger_main(int, struct imsgbuf*);
337 void init_mime(struct mime*);
338 void add_mime(struct mime*, const char*, const char*);
339 void load_default_mime(struct mime*);
340 const char *mime(struct vhost*, const char*);
343 const char *vhost_lang(struct vhost*, const char*);
344 const char *vhost_default_mime(struct vhost*, const char*);
345 const char *vhost_index(struct vhost*, const char*);
346 int vhost_auto_index(struct vhost*, const char*);
347 int vhost_block_return(struct vhost*, const char*, int*, const char**);
348 int vhost_fastcgi(struct vhost*, const char*);
349 int vhost_dirfd(struct vhost*, const char*, size_t*);
350 int vhost_strip(struct vhost*, const char*);
351 X509_STORE *vhost_require_ca(struct vhost*, const char*);
352 int vhost_disable_log(struct vhost*, const char*);
354 void mark_nonblock(int);
355 void start_reply(struct client*, int, const char*);
356 void close_conn(int, short, void*);
357 struct client *try_client_by_id(int);
358 void loop(struct tls*, int, int, struct imsgbuf*);
361 int scandir_fd(int, struct dirent***, int(*)(const struct dirent*),
362 int(*)(const struct dirent**, const struct dirent**));
363 int select_non_dot(const struct dirent*);
364 int select_non_dotdot(const struct dirent*);
367 int send_string(int, const char*);
368 int recv_string(int, char**);
369 int send_iri(int, struct iri*);
370 int recv_iri(int, struct iri*);
371 void free_recvd_iri(struct iri*);
372 int send_vhost(int, struct vhost*);
373 int recv_vhost(int, struct vhost**);
374 int send_time(int, time_t);
375 int recv_time(int, time_t*);
376 int send_fd(int, int);
378 int executor_main(struct imsgbuf*);
381 void handle_fcgi(int, short, void*);
382 void send_fcgi_req(struct fcgi*, struct client*);
385 void sandbox_server_process(void);
386 void sandbox_executor_process(void);
387 void sandbox_logger_process(void);
390 int valid_multibyte_utf8(struct parser*);
391 char *utf8_nth(char*, size_t);
394 int parse_iri(char*, struct iri*, const char**);
395 int trim_req_iri(char*, const char **);
396 int serialize_iri(struct iri*, char*, size_t);
397 char *pct_decode_str(char *);
400 int puny_decode(const char*, char*, size_t, const char**);
403 void block_signals(void);
404 void unblock_signals(void);
405 int starts_with(const char*, const char*);
406 int ends_with(const char*, const char*);
407 ssize_t filesize(int);
408 char *absolutify_path(const char*);
409 char *xstrdup(const char*);
410 void *xcalloc(size_t, size_t);
411 void gen_certificate(const char*, const char*, const char*);
412 X509_STORE *load_ca(const char*);
413 int validate_against_ca(X509_STORE*, const uint8_t*, size_t);
414 void dispatch_imsg(struct imsgbuf*, imsg_handlerfn**, size_t);