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 extern TAILQ_HEAD(vhosthead, vhost) hosts;
83 const char *entrypoint;
86 TAILQ_ENTRY(vhost) vhosts;
88 /* the first location rule is always '*' and holds the default
89 * settings for the vhost, then follows the "real" location
90 * rules as specified in the configuration. */
91 struct lochead locations;
94 struct etm { /* extension to mime */
106 /* from command line */
120 extern const char *config_path;
121 extern struct conf conf;
123 extern struct imsgbuf logibuf, exibuf, servibuf[PROC_MAX];
125 extern int servpipes[PROC_MAX];
145 typedef void (imsg_handlerfn)(struct imsgbuf*, struct imsg*, size_t);
147 typedef void (*statefn)(int, short, void*);
150 * DFA: handle_handshake is the initial state, close_conn the final.
151 * Sometimes we have an enter_* function to handle the state switch.
153 * handle_handshake -> handle_open_conn
154 * handle_handshake -> close_conn // on err
156 * handle_open_conn -> handle_cgi_reply // via open_file/dir/...
157 * handle_open_conn -> handle_dirlist // ...same
158 * handle_open_conn -> send_file // ...same
159 * handle_open_conn -> start_reply // on error
161 * handle_cgi_reply -> handle_cgi // after logging the CGI reply
162 * handle_cgi_reply -> start_reply // on error
164 * handle_cgi -> close_conn
166 * handle_dirlist -> send_directory_listing
167 * handle_dirlist -> close_conn // on error
169 * send_directory_listing -> close_conn
171 * send_file -> close_conn
176 char req[GEMINI_URL_LEN];
178 char domain[DOMAIN_NAME_LEN];
186 /* big enough to store STATUS + SPACE + META + CRLF */
190 struct sockaddr_storage addr;
191 struct vhost *host; /* host they're talking to */
195 char buf[GEMINI_URL_LEN];
197 size_t iri_schema_off;
201 size_t iri_query_off;
202 size_t iri_fragment_off;
205 char spath[PATH_MAX+1];
206 char relpath[PATH_MAX+1];
207 char addr[NI_MAXHOST+1];
209 /* AFAIK there isn't an upper limit for these two fields. */
238 char *data_dir(void);
239 void load_local_cert(const char*, const char*);
240 void load_vhosts(void);
241 int make_socket(int, int);
242 void setup_tls(void);
243 void init_config(void);
244 void free_config(void);
245 void drop_priv(void);
247 /* provided by lex/yacc */
250 extern int yyparse(void);
251 extern int yylex(void);
253 void yyerror(const char*, ...);
254 int parse_portno(const char*);
255 void parse_conf(const char*);
258 void fatal(const char*, ...)
259 __attribute__((format (printf, 1, 2)))
260 __attribute__((__noreturn__));
262 #define LOG_ATTR_FMT __attribute__((format (printf, 2, 3)))
263 void log_err(struct client*, const char*, ...) LOG_ATTR_FMT;
264 void log_warn(struct client*, const char*, ...) LOG_ATTR_FMT;
265 void log_notice(struct client*, const char*, ...) LOG_ATTR_FMT;
266 void log_info(struct client*, const char*, ...) LOG_ATTR_FMT;
267 void log_debug(struct client*, const char*, ...) LOG_ATTR_FMT;
268 void log_request(struct client*, char*, size_t);
269 int logger_main(int, struct imsgbuf*);
272 void init_mime(struct mime*);
273 void add_mime(struct mime*, const char*, const char*);
274 void load_default_mime(struct mime*);
275 const char *mime(struct vhost*, const char*);
278 const char *vhost_lang(struct vhost*, const char*);
279 const char *vhost_default_mime(struct vhost*, const char*);
280 const char *vhost_index(struct vhost*, const char*);
281 int vhost_auto_index(struct vhost*, const char*);
282 int vhost_block_return(struct vhost*, const char*, int*, const char**);
283 int vhost_strip(struct vhost*, const char*);
284 X509_STORE *vhost_require_ca(struct vhost*, const char*);
285 int vhost_disable_log(struct vhost*, const char*);
286 void mark_nonblock(int);
287 void loop(struct tls*, int, int, struct imsgbuf*);
290 int scandir_fd(int, struct dirent***, int(*)(const struct dirent*),
291 int(*)(const struct dirent**, const struct dirent**));
292 int select_non_dot(const struct dirent*);
293 int select_non_dotdot(const struct dirent*);
296 int send_string(int, const char*);
297 int recv_string(int, char**);
298 int send_iri(int, struct iri*);
299 int recv_iri(int, struct iri*);
300 void free_recvd_iri(struct iri*);
301 int send_vhost(int, struct vhost*);
302 int recv_vhost(int, struct vhost**);
303 int send_time(int, time_t);
304 int recv_time(int, time_t*);
305 int send_fd(int, int);
307 int executor_main(struct imsgbuf*);
310 void sandbox_server_process(void);
311 void sandbox_executor_process(void);
312 void sandbox_logger_process(void);
315 int valid_multibyte_utf8(struct parser*);
316 char *utf8_nth(char*, size_t);
319 int parse_iri(char*, struct iri*, const char**);
320 int trim_req_iri(char*, const char **);
321 int serialize_iri(struct iri*, char*, size_t);
322 char *pct_decode_str(char *);
325 int puny_decode(const char*, char*, size_t, const char**);
328 void block_signals(void);
329 void unblock_signals(void);
330 int starts_with(const char*, const char*);
331 int ends_with(const char*, const char*);
332 ssize_t filesize(int);
333 char *absolutify_path(const char*);
334 char *xstrdup(const char*);
335 void *xcalloc(size_t, size_t);
336 void gen_certificate(const char*, const char*, const char*);
337 X509_STORE *load_ca(const char*);
338 int validate_against_ca(X509_STORE*, const uint8_t*, size_t);
339 void dispatch_imsg(struct imsgbuf*, imsg_handlerfn**, size_t);