2 d5aba4c7 2020-12-24 op * Copyright (c) 2020 Omar Polo <op@omarpolo.com>
4 d5aba4c7 2020-12-24 op * Permission to use, copy, modify, and distribute this software for any
5 d5aba4c7 2020-12-24 op * purpose with or without fee is hereby granted, provided that the above
6 d5aba4c7 2020-12-24 op * copyright notice and this permission notice appear in all copies.
8 d5aba4c7 2020-12-24 op * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 d5aba4c7 2020-12-24 op * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 d5aba4c7 2020-12-24 op * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 d5aba4c7 2020-12-24 op * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 d5aba4c7 2020-12-24 op * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 d5aba4c7 2020-12-24 op * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 d5aba4c7 2020-12-24 op * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 488f059a 2020-12-24 op #ifndef GMID_H
18 488f059a 2020-12-24 op #define GMID_H
20 252908e6 2021-01-24 op #include <sys/socket.h>
21 252908e6 2021-01-24 op #include <sys/types.h>
23 488f059a 2020-12-24 op #include <arpa/inet.h>
24 488f059a 2020-12-24 op #include <netinet/in.h>
26 252908e6 2021-01-24 op #include <dirent.h>
27 488f059a 2020-12-24 op #include <poll.h>
28 ca21e100 2021-02-04 op #include <signal.h>
29 488f059a 2020-12-24 op #include <stdio.h>
30 488f059a 2020-12-24 op #include <stdlib.h>
31 b63e30ff 2021-02-07 op #include <time.h>
32 488f059a 2020-12-24 op #include <tls.h>
33 488f059a 2020-12-24 op #include <unistd.h>
35 12042ad7 2021-01-21 op #include "config.h"
37 488f059a 2020-12-24 op #ifndef INFTIM
38 488f059a 2020-12-24 op # define INFTIM -1
41 488f059a 2020-12-24 op #define GEMINI_URL_LEN (1024+3) /* URL max len + \r\n + \0 */
43 488f059a 2020-12-24 op #define SUCCESS 20
44 0be51733 2021-01-20 op #define TEMP_REDIRECT 30
45 488f059a 2020-12-24 op #define TEMP_FAILURE 40
46 35744950 2021-02-01 op #define CGI_ERROR 42
47 488f059a 2020-12-24 op #define NOT_FOUND 51
48 7b1d9790 2021-01-11 op #define PROXY_REFUSED 53
49 488f059a 2020-12-24 op #define BAD_REQUEST 59
51 488f059a 2020-12-24 op #define MAX_USERS 64
53 15902770 2021-01-15 op #define HOSTSLEN 64
54 c8b74339 2021-01-24 op #define LOCLEN 32
56 35cf19e3 2021-01-28 op /* maximum hostname and label length, +1 for the NUL-terminator */
57 35cf19e3 2021-01-28 op #define DOMAIN_NAME_LEN (253+1)
58 35cf19e3 2021-01-28 op #define LABEL_LEN (63+1)
60 c8b74339 2021-01-24 op struct location {
61 fe5967cd 2021-01-27 op const char *match;
62 fe5967cd 2021-01-27 op const char *lang;
63 fe5967cd 2021-01-27 op const char *default_mime;
64 fe5967cd 2021-01-27 op const char *index;
65 252908e6 2021-01-24 op int auto_index; /* 0 auto, -1 off, 1 on */
66 6abda252 2021-02-06 op int block_code;
67 6abda252 2021-02-06 op const char *block_fmt;
71 15902770 2021-01-15 op struct vhost {
72 15902770 2021-01-15 op const char *domain;
73 15902770 2021-01-15 op const char *cert;
74 15902770 2021-01-15 op const char *key;
75 15902770 2021-01-15 op const char *dir;
76 15902770 2021-01-15 op const char *cgi;
77 e3ddf390 2021-02-06 op const char *entrypoint;
80 6016a593 2021-01-30 op /* the first location rule is always '*' and holds the default
81 6016a593 2021-01-30 op * settings for the vhost, from locations[1] onwards there are
82 6016a593 2021-01-30 op * the "real" location rules specified in the configuration. */
83 c8b74339 2021-01-24 op struct location locations[LOCLEN];
86 15902770 2021-01-15 op extern struct vhost hosts[HOSTSLEN];
88 a010b0dd 2021-01-18 op struct etm { /* extension to mime */
89 a010b0dd 2021-01-18 op const char *mime;
90 a010b0dd 2021-01-18 op const char *ext;
94 a010b0dd 2021-01-18 op struct etm *t;
100 3abf91b0 2021-02-07 op /* from command line */
101 3abf91b0 2021-02-07 op int foreground;
104 3abf91b0 2021-02-07 op /* in the config */
107 ae08ec7d 2021-01-25 op uint32_t protos;
108 ae08ec7d 2021-01-25 op struct mime mime;
109 ae08ec7d 2021-01-25 op char *chroot;
114 15902770 2021-01-15 op extern struct conf conf;
115 881a9dd9 2021-01-16 op extern int exfd;
117 ca21e100 2021-02-04 op extern volatile sig_atomic_t hupped;
120 0be51733 2021-01-20 op char *schema;
123 0be51733 2021-01-20 op uint16_t port_no;
126 0be51733 2021-01-20 op char *fragment;
129 0be51733 2021-01-20 op struct parser {
131 0be51733 2021-01-20 op struct iri *parsed;
132 0be51733 2021-01-20 op const char *err;
135 112802ea 2021-02-01 op struct client;
137 112802ea 2021-02-01 op typedef void (*statefn)(struct pollfd*, struct client*);
140 92da8285 2021-02-01 op * DFA: handle_handshake is the initial state, close_conn the final.
141 5f715ce4 2021-02-02 op * Sometimes we have an enter_* function to handle the state switch.
143 92da8285 2021-02-01 op * handle_handshake -> handle_open_conn
144 92da8285 2021-02-01 op * handle_handshake -> close_conn // on err
146 35744950 2021-02-01 op * handle_open_conn -> handle_cgi_reply // via open_file/dir/...
147 5f715ce4 2021-02-02 op * handle_open_conn -> handle_dirlist // ...same
148 92da8285 2021-02-01 op * handle_open_conn -> send_file // ...same
149 35744950 2021-02-01 op * handle_open_conn -> start_reply // on error
151 35744950 2021-02-01 op * handle_cgi_reply -> handle_cgi // after logging the CGI reply
152 35744950 2021-02-01 op * handle_cgi_reply -> start_reply // on error
154 92da8285 2021-02-01 op * handle_cgi -> close_conn
156 5f715ce4 2021-02-02 op * handle_dirlist -> send_directory_listing
157 5f715ce4 2021-02-02 op * handle_dirlist -> close_conn // on error
159 92da8285 2021-02-01 op * send_directory_listing -> close_conn
161 92da8285 2021-02-01 op * send_file -> close_conn
163 488f059a 2020-12-24 op struct client {
164 488f059a 2020-12-24 op struct tls *ctx;
165 0be51733 2021-01-20 op char req[GEMINI_URL_LEN];
166 0be51733 2021-01-20 op struct iri iri;
167 3300cbe0 2021-01-27 op char domain[DOMAIN_NAME_LEN];
168 112802ea 2021-02-01 op statefn state, next;
170 488f059a 2020-12-24 op const char *meta;
171 488f059a 2020-12-24 op int fd, waiting_on_child;
172 488f059a 2020-12-24 op char sbuf[1024]; /* static buffer */
173 488f059a 2020-12-24 op void *buf, *i; /* mmap buffer */
174 488f059a 2020-12-24 op ssize_t len, off; /* mmap/static buffer */
176 709d6e5e 2021-01-10 op struct sockaddr_storage addr;
177 f7b816dc 2021-01-15 op struct vhost *host; /* host she's talking to */
182 488f059a 2020-12-24 op FILE_EXECUTABLE,
183 488f059a 2020-12-24 op FILE_DIRECTORY,
184 488f059a 2020-12-24 op FILE_MISSING,
188 4a28dd01 2020-12-28 op void sig_handler(int);
189 8443bff7 2021-01-25 op void mkdirs(const char*);
190 8443bff7 2021-01-25 op char *data_dir(void);
191 8443bff7 2021-01-25 op void load_local_cert(const char*, const char*);
192 ae08ec7d 2021-01-25 op void load_vhosts(void);
193 33ac26a0 2021-01-21 op int make_socket(int, int);
194 ae08ec7d 2021-01-25 op void setup_tls(void);
195 c8b74339 2021-01-24 op void init_config(void);
196 ca21e100 2021-02-04 op void free_config(void);
197 ae08ec7d 2021-01-25 op void drop_priv(void);
199 f7b816dc 2021-01-15 op /* provided by lex/yacc */
200 15902770 2021-01-15 op extern FILE *yyin;
201 15902770 2021-01-15 op extern int yylineno;
202 15902770 2021-01-15 op extern int yyparse(void);
203 15902770 2021-01-15 op extern int yylex(void);
205 6abda252 2021-02-06 op void yyerror(const char*, ...);
206 13ed2fb6 2021-01-27 op int parse_portno(const char*);
207 13ed2fb6 2021-01-27 op void parse_conf(const char*);
210 3abf91b0 2021-02-07 op void fatal(const char*, ...)
211 3abf91b0 2021-02-07 op __attribute__((format (printf, 1, 2)))
212 3abf91b0 2021-02-07 op __attribute__((__noreturn__));
214 3abf91b0 2021-02-07 op #define LOG_ATTR_FMT __attribute__((format (printf, 2, 3)))
215 3abf91b0 2021-02-07 op void log_err(struct client*, const char*, ...) LOG_ATTR_FMT;
216 3abf91b0 2021-02-07 op void log_warn(struct client*, const char*, ...) LOG_ATTR_FMT;
217 3abf91b0 2021-02-07 op void log_notice(struct client*, const char*, ...) LOG_ATTR_FMT;
218 3abf91b0 2021-02-07 op void log_info(struct client*, const char*, ...) LOG_ATTR_FMT;
219 3abf91b0 2021-02-07 op void log_debug(struct client*, const char*, ...) LOG_ATTR_FMT;
220 3abf91b0 2021-02-07 op void log_request(struct client*, char*, size_t);
223 b2a6b613 2021-01-21 op void init_mime(struct mime*);
224 b2a6b613 2021-01-21 op void add_mime(struct mime*, const char*, const char*);
225 b2a6b613 2021-01-21 op void load_default_mime(struct mime*);
226 6119e13e 2021-01-19 op const char *mime(struct vhost*, const char*);
228 d3a08f4d 2021-01-17 op /* server.c */
229 c8b74339 2021-01-24 op const char *vhost_lang(struct vhost*, const char*);
230 c8b74339 2021-01-24 op const char *vhost_default_mime(struct vhost*, const char*);
231 c8b74339 2021-01-24 op const char *vhost_index(struct vhost*, const char*);
232 252908e6 2021-01-24 op int vhost_auto_index(struct vhost*, const char*);
233 6abda252 2021-02-06 op int vhost_block_return(struct vhost*, const char*, int*, const char**);
234 6abda252 2021-02-06 op int vhost_strip(struct vhost*, const char*);
235 9b8f5ed2 2021-02-03 op void mark_nonblock(int);
236 d3a08f4d 2021-01-17 op void loop(struct tls*, int, int);
239 881a9dd9 2021-01-16 op int send_string(int, const char*);
240 881a9dd9 2021-01-16 op int recv_string(int, char**);
241 2fafa2d2 2021-02-01 op int send_iri(int, struct iri*);
242 2fafa2d2 2021-02-01 op int recv_iri(int, struct iri*);
243 2fafa2d2 2021-02-01 op void free_recvd_iri(struct iri*);
244 881a9dd9 2021-01-16 op int send_vhost(int, struct vhost*);
245 881a9dd9 2021-01-16 op int recv_vhost(int, struct vhost**);
246 b63e30ff 2021-02-07 op int send_time(int, time_t);
247 b63e30ff 2021-02-07 op int recv_time(int, time_t*);
248 881a9dd9 2021-01-16 op int send_fd(int, int);
249 881a9dd9 2021-01-16 op int recv_fd(int);
250 4e2e2ab1 2021-02-03 op int executor_main(void);
252 dafb57b8 2021-01-15 op /* sandbox.c */
253 33ac26a0 2021-01-21 op void sandbox(void);
256 ef04b551 2021-01-09 op int valid_multibyte_utf8(struct parser*);
257 3300cbe0 2021-01-27 op char *utf8_nth(char*, size_t);
260 3c1cf9d0 2021-01-11 op int parse_iri(char*, struct iri*, const char**);
261 c4f682f8 2021-01-27 op int trim_req_iri(char*, const char **);
262 2fafa2d2 2021-02-01 op int serialize_iri(struct iri*, char*, size_t);
263 9f006a21 2021-02-07 op char *pct_decode_str(char *);
266 a2fd8013 2021-01-29 op int puny_decode(const char*, char*, size_t, const char**);
268 44ee1bac 2021-01-27 op /* utils.c */
269 ca21e100 2021-02-04 op void block_signals(void);
270 ca21e100 2021-02-04 op void unblock_signals(void);
271 44ee1bac 2021-01-27 op int starts_with(const char*, const char*);
272 44ee1bac 2021-01-27 op int ends_with(const char*, const char*);
273 44ee1bac 2021-01-27 op ssize_t filesize(int);
274 2fafa2d2 2021-02-01 op char *absolutify_path(const char*);
275 ca21e100 2021-02-04 op char *xstrdup(const char*);
276 3abf91b0 2021-02-07 op void gen_certificate(const char*, const char*, const char*);