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 */
43 #define TEMP_REDIRECT 30
44 #define TEMP_FAILURE 40
46 #define PROXY_REFUSED 53
47 #define BAD_REQUEST 59
54 /* maximum hostname and label length, +1 for the NUL-terminator */
55 #define DOMAIN_NAME_LEN (253+1)
56 #define LABEL_LEN (63+1)
58 #define LOGE(c, fmt, ...) logs(LOG_ERR, c, fmt, __VA_ARGS__)
59 #define LOGW(c, fmt, ...) logs(LOG_WARNING, c, fmt, __VA_ARGS__)
60 #define LOGN(c, fmt, ...) logs(LOG_NOTICE, c, fmt, __VA_ARGS__)
61 #define LOGI(c, fmt, ...) logs(LOG_INFO, c, fmt, __VA_ARGS__)
62 #define LOGD(c, fmt, ...) logs(LOG_DEBUG, c, fmt, __VA_ARGS__)
67 const char *default_mime;
69 int auto_index; /* 0 auto, -1 off, 1 on */
79 struct location locations[LOCLEN];
82 extern struct vhost hosts[HOSTSLEN];
84 struct etm { /* extension to mime */
104 extern struct conf conf;
135 char req[GEMINI_URL_LEN];
137 char domain[DOMAIN_NAME_LEN];
141 int fd, waiting_on_child;
142 char sbuf[1024]; /* static buffer */
143 void *buf, *i; /* mmap buffer */
144 ssize_t len, off; /* mmap/static buffer */
146 struct sockaddr_storage addr;
147 struct vhost *host; /* host she's talking to */
158 __attribute__((format (printf, 1, 2)))
159 __attribute__((__noreturn__))
160 void fatal(const char*, ...);
162 __attribute__((format (printf, 3, 4)))
163 void logs(int, struct client*, const char*, ...);
164 void log_request(struct client*, char*, size_t);
166 void sig_handler(int);
167 void gen_certificate(const char*, const char*, const char*);
168 void mkdirs(const char*);
169 char *data_dir(void);
170 void load_local_cert(const char*, const char*);
171 void load_vhosts(void);
172 int make_socket(int, int);
173 void setup_tls(void);
174 int listener_main(void);
175 void init_config(void);
176 void drop_priv(void);
177 void usage(const char*);
179 /* provided by lex/yacc */
182 extern int yyparse(void);
183 extern int yylex(void);
185 void yyerror(const char*);
186 int parse_portno(const char*);
187 void parse_conf(const char*);
190 void init_mime(struct mime*);
191 void add_mime(struct mime*, const char*, const char*);
192 void load_default_mime(struct mime*);
193 const char *mime(struct vhost*, const char*);
196 const char *vhost_lang(struct vhost*, const char*);
197 const char *vhost_default_mime(struct vhost*, const char*);
198 const char *vhost_index(struct vhost*, const char*);
199 int vhost_auto_index(struct vhost*, const char*);
200 int check_path(struct client*, const char*, int*);
201 void open_file(struct pollfd*, struct client*);
202 void load_file(struct pollfd*, struct client*);
203 void check_for_cgi(char *, char*, struct pollfd*, struct client*);
204 void mark_nonblock(int);
205 void handle_handshake(struct pollfd*, struct client*);
206 void handle_open_conn(struct pollfd*, struct client*);
207 void start_reply(struct pollfd*, struct client*, int, const char*);
208 void start_cgi(const char*, const char*, const char*, struct pollfd*, struct client*);
209 void send_file(struct pollfd*, struct client*);
210 void open_dir(struct pollfd*, struct client*);
211 void redirect_canonical_dir(struct pollfd*, struct client*);
212 int read_next_dir_entry(struct client*);
213 void send_directory_listing(struct pollfd*, struct client*);
214 void cgi_poll_on_child(struct pollfd*, struct client*);
215 void cgi_poll_on_client(struct pollfd*, struct client*);
216 void handle_cgi(struct pollfd*, struct client*);
217 void close_conn(struct pollfd*, struct client*);
218 void do_accept(int, struct tls*, struct pollfd*, struct client*);
219 void handle(struct pollfd*, struct client*);
220 void loop(struct tls*, int, int);
223 int send_string(int, const char*);
224 int recv_string(int, char**);
225 int send_vhost(int, struct vhost*);
226 int recv_vhost(int, struct vhost**);
227 int send_fd(int, int);
229 int executor_main(int);
235 int valid_multibyte_utf8(struct parser*);
236 char *utf8_nth(char*, size_t);
239 int parse_iri(char*, struct iri*, const char**);
240 int trim_req_iri(char*, const char **);
243 int puny_decode(const char*, char*, size_t, const char**);
246 int starts_with(const char*, const char*);
247 int ends_with(const char*, const char*);
248 ssize_t filesize(int);