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.
20 #include <sys/socket.h>
21 #include <sys/types.h>
23 #include <arpa/inet.h>
24 #include <netinet/in.h>
40 #define GEMINI_URL_LEN (1024+3) /* URL max len + \r\n + \0 */
42 /* large enough to hold a copy of a gemini URL and still have extra room */
46 #define TEMP_REDIRECT 30
47 #define TEMP_FAILURE 40
49 #define PROXY_REFUSED 53
50 #define BAD_REQUEST 59
57 /* RFC1034 imposes this limit. 63+1 for the NUL-terminator */
58 #define DOMAIN_NAME_LEN (63+1)
60 #define LOGE(c, fmt, ...) logs(LOG_ERR, c, fmt, __VA_ARGS__)
61 #define LOGW(c, fmt, ...) logs(LOG_WARNING, c, fmt, __VA_ARGS__)
62 #define LOGN(c, fmt, ...) logs(LOG_NOTICE, c, fmt, __VA_ARGS__)
63 #define LOGI(c, fmt, ...) logs(LOG_INFO, c, fmt, __VA_ARGS__)
64 #define LOGD(c, fmt, ...) logs(LOG_DEBUG, c, fmt, __VA_ARGS__)
71 int auto_index; /* 0 auto, -1 off, 1 on */
81 struct location locations[LOCLEN];
84 extern struct vhost hosts[HOSTSLEN];
86 struct etm { /* extension to mime */
107 extern struct conf conf;
138 char req[GEMINI_URL_LEN];
140 char domain[DOMAIN_NAME_LEN];
144 int fd, waiting_on_child;
145 char sbuf[1024]; /* static buffer */
146 void *buf, *i; /* mmap buffer */
147 ssize_t len, off; /* mmap/static buffer */
149 struct sockaddr_storage addr;
150 struct vhost *host; /* host she's talking to */
162 __attribute__((format (printf, 1, 2)))
163 __attribute__((__noreturn__))
164 void fatal(const char*, ...);
166 __attribute__((format (printf, 3, 4)))
167 void logs(int, struct client*, const char*, ...);
168 void log_request(struct client*, char*, size_t);
170 void sig_handler(int);
171 int starts_with(const char*, const char*);
172 int ends_with(const char*, const char*);
173 ssize_t filesize(int);
174 char *absolutify_path(const char*);
175 void gen_certificate(const char*, const char*, const char*);
176 void mkdirs(const char*);
177 char *data_dir(void);
178 void load_local_cert(const char*, const char*);
179 void yyerror(const char*);
180 int parse_portno(const char*);
181 void parse_conf(const char*);
182 void load_vhosts(void);
183 int make_socket(int, int);
184 void setup_tls(void);
185 int listener_main(void);
186 void init_config(void);
187 void drop_priv(void);
188 void usage(const char*);
190 /* provided by lex/yacc */
193 extern int yyparse(void);
194 extern int yylex(void);
197 void init_mime(struct mime*);
198 void add_mime(struct mime*, const char*, const char*);
199 void load_default_mime(struct mime*);
200 const char *mime(struct vhost*, const char*);
203 const char *vhost_lang(struct vhost*, const char*);
204 const char *vhost_default_mime(struct vhost*, const char*);
205 const char *vhost_index(struct vhost*, const char*);
206 int vhost_auto_index(struct vhost*, const char*);
207 int check_path(struct client*, const char*, int*);
208 void open_file(struct pollfd*, struct client*);
209 void load_file(struct pollfd*, struct client*);
210 void check_for_cgi(char *, char*, struct pollfd*, struct client*);
211 void mark_nonblock(int);
212 void handle_handshake(struct pollfd*, struct client*);
213 void handle_open_conn(struct pollfd*, struct client*);
214 void start_reply(struct pollfd*, struct client*, int, const char*);
215 void start_cgi(const char*, const char*, const char*, struct pollfd*, struct client*);
216 void send_file(struct pollfd*, struct client*);
217 void open_dir(struct pollfd*, struct client*);
218 void redirect_canonical_dir(struct pollfd*, struct client*);
219 int read_next_dir_entry(struct client*);
220 void send_directory_listing(struct pollfd*, struct client*);
221 void cgi_poll_on_child(struct pollfd*, struct client*);
222 void cgi_poll_on_client(struct pollfd*, struct client*);
223 void handle_cgi(struct pollfd*, struct client*);
224 void close_conn(struct pollfd*, struct client*);
225 void do_accept(int, struct tls*, struct pollfd*, struct client*);
226 void handle(struct pollfd*, struct client*);
227 void loop(struct tls*, int, int);
230 int send_string(int, const char*);
231 int recv_string(int, char**);
232 int send_vhost(int, struct vhost*);
233 int recv_vhost(int, struct vhost**);
234 int send_fd(int, int);
236 int executor_main(int);
242 int valid_multibyte_utf8(struct parser*);
243 char *utf8_nth(char*, size_t);
246 int parse_iri(char*, struct iri*, const char**);
247 int trim_req_iri(char*);
250 int puny_decode(char*, char*, size_t);