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>
36 #include <openssl/x509.h>
38 #define GEMINI_URL_LEN (1024+3) /* URL max len + \r\n + \0 */
41 #define TEMP_REDIRECT 30
42 #define TEMP_FAILURE 40
45 #define PROXY_REFUSED 53
46 #define BAD_REQUEST 59
47 #define CLIENT_CERT_REQ 60
48 #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)
62 const char *default_mime;
64 int auto_index; /* 0 auto, -1 off, 1 on */
66 const char *block_fmt;
78 const char *entrypoint;
81 /* the first location rule is always '*' and holds the default
82 * settings for the vhost, from locations[1] onwards there are
83 * the "real" location rules specified in the configuration. */
84 struct location locations[LOCLEN];
87 extern struct vhost hosts[HOSTSLEN];
89 struct etm { /* extension to mime */
101 /* from command line */
115 extern const char *config_path;
116 extern struct conf conf;
119 extern volatile sig_atomic_t hupped;
139 typedef void (*statefn)(int, short, void*);
142 * DFA: handle_handshake is the initial state, close_conn the final.
143 * Sometimes we have an enter_* function to handle the state switch.
145 * handle_handshake -> handle_open_conn
146 * handle_handshake -> close_conn // on err
148 * handle_open_conn -> handle_cgi_reply // via open_file/dir/...
149 * handle_open_conn -> handle_dirlist // ...same
150 * handle_open_conn -> send_file // ...same
151 * handle_open_conn -> start_reply // on error
153 * handle_cgi_reply -> handle_cgi // after logging the CGI reply
154 * handle_cgi_reply -> start_reply // on error
156 * handle_cgi -> close_conn
158 * handle_dirlist -> send_directory_listing
159 * handle_dirlist -> close_conn // on error
161 * send_directory_listing -> close_conn
163 * send_file -> close_conn
167 char req[GEMINI_URL_LEN];
169 char domain[DOMAIN_NAME_LEN];
177 struct sockaddr_storage addr;
178 struct vhost *host; /* host she's talking to */
189 void sig_handler(int);
190 void mkdirs(const char*);
191 char *data_dir(void);
192 void load_local_cert(const char*, const char*);
193 void load_vhosts(void);
194 int make_socket(int, int);
195 void setup_tls(void);
196 void init_config(void);
197 void free_config(void);
198 void drop_priv(void);
200 /* provided by lex/yacc */
203 extern int yyparse(void);
204 extern int yylex(void);
206 void yyerror(const char*, ...);
207 int parse_portno(const char*);
208 void parse_conf(const char*);
211 void fatal(const char*, ...)
212 __attribute__((format (printf, 1, 2)))
213 __attribute__((__noreturn__));
215 #define LOG_ATTR_FMT __attribute__((format (printf, 2, 3)))
216 void log_err(struct client*, const char*, ...) LOG_ATTR_FMT;
217 void log_warn(struct client*, const char*, ...) LOG_ATTR_FMT;
218 void log_notice(struct client*, const char*, ...) LOG_ATTR_FMT;
219 void log_info(struct client*, const char*, ...) LOG_ATTR_FMT;
220 void log_debug(struct client*, const char*, ...) LOG_ATTR_FMT;
221 void log_request(struct client*, char*, size_t);
222 void logger_init(void);
225 void init_mime(struct mime*);
226 void add_mime(struct mime*, const char*, const char*);
227 void load_default_mime(struct mime*);
228 const char *mime(struct vhost*, const char*);
231 const char *vhost_lang(struct vhost*, const char*);
232 const char *vhost_default_mime(struct vhost*, const char*);
233 const char *vhost_index(struct vhost*, const char*);
234 int vhost_auto_index(struct vhost*, const char*);
235 int vhost_block_return(struct vhost*, const char*, int*, const char**);
236 int vhost_strip(struct vhost*, const char*);
237 X509_STORE *vhost_require_ca(struct vhost*, const char*);
238 int vhost_disable_log(struct vhost*, const char*);
239 void mark_nonblock(int);
240 void loop(struct tls*, int, int);
243 int send_string(int, const char*);
244 int recv_string(int, char**);
245 int send_iri(int, struct iri*);
246 int recv_iri(int, struct iri*);
247 void free_recvd_iri(struct iri*);
248 int send_vhost(int, struct vhost*);
249 int recv_vhost(int, struct vhost**);
250 int send_time(int, time_t);
251 int recv_time(int, time_t*);
252 int send_fd(int, int);
254 int executor_main(void);
260 int valid_multibyte_utf8(struct parser*);
261 char *utf8_nth(char*, size_t);
264 int parse_iri(char*, struct iri*, const char**);
265 int trim_req_iri(char*, const char **);
266 int serialize_iri(struct iri*, char*, size_t);
267 char *pct_decode_str(char *);
270 int puny_decode(const char*, char*, size_t, const char**);
273 void block_signals(void);
274 void unblock_signals(void);
275 int starts_with(const char*, const char*);
276 int ends_with(const char*, const char*);
277 ssize_t filesize(int);
278 char *absolutify_path(const char*);
279 char *xstrdup(const char*);
280 void gen_certificate(const char*, const char*, const char*);
281 X509_STORE *load_ca(const char*);
282 int validate_against_ca(X509_STORE*, const uint8_t*, size_t);