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>
40 #define GEMINI_URL_LEN (1024+3) /* URL max len + \r\n + \0 */
43 #define TEMP_REDIRECT 30
44 #define TEMP_FAILURE 40
47 #define PROXY_REFUSED 53
48 #define BAD_REQUEST 59
49 #define CLIENT_CERT_REQ 60
50 #define CERT_NOT_AUTH 61
54 /* maximum hostname and label length, +1 for the NUL-terminator */
55 #define DOMAIN_NAME_LEN (253+1)
56 #define LABEL_LEN (63+1)
60 TAILQ_HEAD(lochead, location);
64 const char *default_mime;
66 int auto_index; /* 0 auto, -1 off, 1 on */
68 const char *block_fmt;
73 TAILQ_ENTRY(location) locations;
76 TAILQ_HEAD(envhead, envlist);
80 TAILQ_ENTRY(envlist) envs;
83 extern TAILQ_HEAD(vhosthead, vhost) hosts;
90 const char *entrypoint;
93 TAILQ_ENTRY(vhost) vhosts;
95 /* the first location rule is always '*' and holds the default
96 * settings for the vhost, then follows the "real" location
97 * rules as specified in the configuration. */
98 struct lochead locations;
103 struct etm { /* extension to mime */
115 /* from command line */
129 extern const char *config_path;
130 extern struct conf conf;
132 extern struct imsgbuf logibuf, exibuf, servibuf[PROC_MAX];
134 extern int servpipes[PROC_MAX];
154 typedef void (imsg_handlerfn)(struct imsgbuf*, struct imsg*, size_t);
156 typedef void (*statefn)(int, short, void*);
159 * DFA: handle_handshake is the initial state, close_conn the final.
160 * Sometimes we have an enter_* function to handle the state switch.
162 * handle_handshake -> handle_open_conn
163 * handle_handshake -> close_conn // on err
165 * handle_open_conn -> handle_cgi_reply // via open_file/dir/...
166 * handle_open_conn -> handle_dirlist // ...same
167 * handle_open_conn -> send_file // ...same
168 * handle_open_conn -> start_reply // on error
170 * handle_cgi_reply -> handle_cgi // after logging the CGI reply
171 * handle_cgi_reply -> start_reply // on error
173 * handle_cgi -> close_conn
175 * handle_dirlist -> send_directory_listing
176 * handle_dirlist -> close_conn // on error
178 * send_directory_listing -> close_conn
180 * send_file -> close_conn
185 char req[GEMINI_URL_LEN];
187 char domain[DOMAIN_NAME_LEN];
195 /* big enough to store STATUS + SPACE + META + CRLF */
199 struct sockaddr_storage addr;
200 struct vhost *host; /* host they're talking to */
204 char buf[GEMINI_URL_LEN];
206 size_t iri_schema_off;
210 size_t iri_query_off;
211 size_t iri_fragment_off;
214 char spath[PATH_MAX+1];
215 char relpath[PATH_MAX+1];
216 char addr[NI_MAXHOST+1];
218 /* AFAIK there isn't an upper limit for these two fields. */
247 char *data_dir(void);
248 void load_local_cert(const char*, const char*);
249 void load_vhosts(void);
250 int make_socket(int, int);
251 void setup_tls(void);
252 void init_config(void);
253 void free_config(void);
254 void drop_priv(void);
256 /* provided by lex/yacc */
259 extern int yyparse(void);
260 extern int yylex(void);
262 void yyerror(const char*, ...);
263 int parse_portno(const char*);
264 void parse_conf(const char*);
267 void fatal(const char*, ...)
268 __attribute__((format (printf, 1, 2)))
269 __attribute__((__noreturn__));
271 #define LOG_ATTR_FMT __attribute__((format (printf, 2, 3)))
272 void log_err(struct client*, const char*, ...) LOG_ATTR_FMT;
273 void log_warn(struct client*, const char*, ...) LOG_ATTR_FMT;
274 void log_notice(struct client*, const char*, ...) LOG_ATTR_FMT;
275 void log_info(struct client*, const char*, ...) LOG_ATTR_FMT;
276 void log_debug(struct client*, const char*, ...) LOG_ATTR_FMT;
277 void log_request(struct client*, char*, size_t);
278 int logger_main(int, struct imsgbuf*);
281 void init_mime(struct mime*);
282 void add_mime(struct mime*, const char*, const char*);
283 void load_default_mime(struct mime*);
284 const char *mime(struct vhost*, const char*);
287 const char *vhost_lang(struct vhost*, const char*);
288 const char *vhost_default_mime(struct vhost*, const char*);
289 const char *vhost_index(struct vhost*, const char*);
290 int vhost_auto_index(struct vhost*, const char*);
291 int vhost_block_return(struct vhost*, const char*, int*, const char**);
292 int vhost_strip(struct vhost*, const char*);
293 X509_STORE *vhost_require_ca(struct vhost*, const char*);
294 int vhost_disable_log(struct vhost*, const char*);
295 void mark_nonblock(int);
296 void loop(struct tls*, int, int, struct imsgbuf*);
299 int scandir_fd(int, struct dirent***, int(*)(const struct dirent*),
300 int(*)(const struct dirent**, const struct dirent**));
301 int select_non_dot(const struct dirent*);
302 int select_non_dotdot(const struct dirent*);
305 int send_string(int, const char*);
306 int recv_string(int, char**);
307 int send_iri(int, struct iri*);
308 int recv_iri(int, struct iri*);
309 void free_recvd_iri(struct iri*);
310 int send_vhost(int, struct vhost*);
311 int recv_vhost(int, struct vhost**);
312 int send_time(int, time_t);
313 int recv_time(int, time_t*);
314 int send_fd(int, int);
316 int executor_main(struct imsgbuf*);
319 void sandbox_server_process(void);
320 void sandbox_executor_process(void);
321 void sandbox_logger_process(void);
324 int valid_multibyte_utf8(struct parser*);
325 char *utf8_nth(char*, size_t);
328 int parse_iri(char*, struct iri*, const char**);
329 int trim_req_iri(char*, const char **);
330 int serialize_iri(struct iri*, char*, size_t);
331 char *pct_decode_str(char *);
334 int puny_decode(const char*, char*, size_t, const char**);
337 void block_signals(void);
338 void unblock_signals(void);
339 int starts_with(const char*, const char*);
340 int ends_with(const char*, const char*);
341 ssize_t filesize(int);
342 char *absolutify_path(const char*);
343 char *xstrdup(const char*);
344 void *xcalloc(size_t, size_t);
345 void gen_certificate(const char*, const char*, const char*);
346 X509_STORE *load_ca(const char*);
347 int validate_against_ca(X509_STORE*, const uint8_t*, size_t);
348 void dispatch_imsg(struct imsgbuf*, imsg_handlerfn**, size_t);