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 488f059a 2020-12-24 op #include <tls.h>
32 488f059a 2020-12-24 op #include <unistd.h>
34 12042ad7 2021-01-21 op #include "config.h"
36 488f059a 2020-12-24 op #ifndef INFTIM
37 488f059a 2020-12-24 op # define INFTIM -1
40 488f059a 2020-12-24 op #define GEMINI_URL_LEN (1024+3) /* URL max len + \r\n + \0 */
42 488f059a 2020-12-24 op #define SUCCESS 20
43 0be51733 2021-01-20 op #define TEMP_REDIRECT 30
44 488f059a 2020-12-24 op #define TEMP_FAILURE 40
45 35744950 2021-02-01 op #define CGI_ERROR 42
46 488f059a 2020-12-24 op #define NOT_FOUND 51
47 7b1d9790 2021-01-11 op #define PROXY_REFUSED 53
48 488f059a 2020-12-24 op #define BAD_REQUEST 59
50 488f059a 2020-12-24 op #define MAX_USERS 64
52 15902770 2021-01-15 op #define HOSTSLEN 64
53 c8b74339 2021-01-24 op #define LOCLEN 32
55 35cf19e3 2021-01-28 op /* maximum hostname and label length, +1 for the NUL-terminator */
56 35cf19e3 2021-01-28 op #define DOMAIN_NAME_LEN (253+1)
57 35cf19e3 2021-01-28 op #define LABEL_LEN (63+1)
59 c8b74339 2021-01-24 op struct location {
60 fe5967cd 2021-01-27 op const char *match;
61 fe5967cd 2021-01-27 op const char *lang;
62 fe5967cd 2021-01-27 op const char *default_mime;
63 fe5967cd 2021-01-27 op const char *index;
64 252908e6 2021-01-24 op int auto_index; /* 0 auto, -1 off, 1 on */
65 6abda252 2021-02-06 op int block_code;
66 6abda252 2021-02-06 op const char *block_fmt;
70 15902770 2021-01-15 op struct vhost {
71 15902770 2021-01-15 op const char *domain;
72 15902770 2021-01-15 op const char *cert;
73 15902770 2021-01-15 op const char *key;
74 15902770 2021-01-15 op const char *dir;
75 15902770 2021-01-15 op const char *cgi;
76 e3ddf390 2021-02-06 op const char *entrypoint;
79 6016a593 2021-01-30 op /* the first location rule is always '*' and holds the default
80 6016a593 2021-01-30 op * settings for the vhost, from locations[1] onwards there are
81 6016a593 2021-01-30 op * the "real" location rules specified in the configuration. */
82 c8b74339 2021-01-24 op struct location locations[LOCLEN];
85 15902770 2021-01-15 op extern struct vhost hosts[HOSTSLEN];
87 a010b0dd 2021-01-18 op struct etm { /* extension to mime */
88 a010b0dd 2021-01-18 op const char *mime;
89 a010b0dd 2021-01-18 op const char *ext;
93 a010b0dd 2021-01-18 op struct etm *t;
99 3abf91b0 2021-02-07 op /* from command line */
100 3abf91b0 2021-02-07 op int foreground;
103 3abf91b0 2021-02-07 op /* in the config */
106 ae08ec7d 2021-01-25 op uint32_t protos;
107 ae08ec7d 2021-01-25 op struct mime mime;
108 ae08ec7d 2021-01-25 op char *chroot;
113 15902770 2021-01-15 op extern struct conf conf;
114 881a9dd9 2021-01-16 op extern int exfd;
116 ca21e100 2021-02-04 op extern volatile sig_atomic_t hupped;
119 0be51733 2021-01-20 op char *schema;
122 0be51733 2021-01-20 op uint16_t port_no;
125 0be51733 2021-01-20 op char *fragment;
128 0be51733 2021-01-20 op struct parser {
130 0be51733 2021-01-20 op struct iri *parsed;
131 0be51733 2021-01-20 op const char *err;
134 112802ea 2021-02-01 op struct client;
136 112802ea 2021-02-01 op typedef void (*statefn)(struct pollfd*, struct client*);
139 92da8285 2021-02-01 op * DFA: handle_handshake is the initial state, close_conn the final.
140 5f715ce4 2021-02-02 op * Sometimes we have an enter_* function to handle the state switch.
142 92da8285 2021-02-01 op * handle_handshake -> handle_open_conn
143 92da8285 2021-02-01 op * handle_handshake -> close_conn // on err
145 35744950 2021-02-01 op * handle_open_conn -> handle_cgi_reply // via open_file/dir/...
146 5f715ce4 2021-02-02 op * handle_open_conn -> handle_dirlist // ...same
147 92da8285 2021-02-01 op * handle_open_conn -> send_file // ...same
148 35744950 2021-02-01 op * handle_open_conn -> start_reply // on error
150 35744950 2021-02-01 op * handle_cgi_reply -> handle_cgi // after logging the CGI reply
151 35744950 2021-02-01 op * handle_cgi_reply -> start_reply // on error
153 92da8285 2021-02-01 op * handle_cgi -> close_conn
155 5f715ce4 2021-02-02 op * handle_dirlist -> send_directory_listing
156 5f715ce4 2021-02-02 op * handle_dirlist -> close_conn // on error
158 92da8285 2021-02-01 op * send_directory_listing -> close_conn
160 92da8285 2021-02-01 op * send_file -> close_conn
162 488f059a 2020-12-24 op struct client {
163 488f059a 2020-12-24 op struct tls *ctx;
164 0be51733 2021-01-20 op char req[GEMINI_URL_LEN];
165 0be51733 2021-01-20 op struct iri iri;
166 3300cbe0 2021-01-27 op char domain[DOMAIN_NAME_LEN];
167 112802ea 2021-02-01 op statefn state, next;
169 488f059a 2020-12-24 op const char *meta;
170 488f059a 2020-12-24 op int fd, waiting_on_child;
171 488f059a 2020-12-24 op char sbuf[1024]; /* static buffer */
172 488f059a 2020-12-24 op void *buf, *i; /* mmap buffer */
173 488f059a 2020-12-24 op ssize_t len, off; /* mmap/static buffer */
175 709d6e5e 2021-01-10 op struct sockaddr_storage addr;
176 f7b816dc 2021-01-15 op struct vhost *host; /* host she's talking to */
181 488f059a 2020-12-24 op FILE_EXECUTABLE,
182 488f059a 2020-12-24 op FILE_DIRECTORY,
183 488f059a 2020-12-24 op FILE_MISSING,
187 4a28dd01 2020-12-28 op void sig_handler(int);
188 8443bff7 2021-01-25 op void mkdirs(const char*);
189 8443bff7 2021-01-25 op char *data_dir(void);
190 8443bff7 2021-01-25 op void load_local_cert(const char*, const char*);
191 ae08ec7d 2021-01-25 op void load_vhosts(void);
192 33ac26a0 2021-01-21 op int make_socket(int, int);
193 ae08ec7d 2021-01-25 op void setup_tls(void);
194 c8b74339 2021-01-24 op void init_config(void);
195 ca21e100 2021-02-04 op void free_config(void);
196 ae08ec7d 2021-01-25 op void drop_priv(void);
198 f7b816dc 2021-01-15 op /* provided by lex/yacc */
199 15902770 2021-01-15 op extern FILE *yyin;
200 15902770 2021-01-15 op extern int yylineno;
201 15902770 2021-01-15 op extern int yyparse(void);
202 15902770 2021-01-15 op extern int yylex(void);
204 6abda252 2021-02-06 op void yyerror(const char*, ...);
205 13ed2fb6 2021-01-27 op int parse_portno(const char*);
206 13ed2fb6 2021-01-27 op void parse_conf(const char*);
209 3abf91b0 2021-02-07 op void fatal(const char*, ...)
210 3abf91b0 2021-02-07 op __attribute__((format (printf, 1, 2)))
211 3abf91b0 2021-02-07 op __attribute__((__noreturn__));
213 3abf91b0 2021-02-07 op #define LOG_ATTR_FMT __attribute__((format (printf, 2, 3)))
214 3abf91b0 2021-02-07 op void log_err(struct client*, const char*, ...) LOG_ATTR_FMT;
215 3abf91b0 2021-02-07 op void log_warn(struct client*, const char*, ...) LOG_ATTR_FMT;
216 3abf91b0 2021-02-07 op void log_notice(struct client*, const char*, ...) LOG_ATTR_FMT;
217 3abf91b0 2021-02-07 op void log_info(struct client*, const char*, ...) LOG_ATTR_FMT;
218 3abf91b0 2021-02-07 op void log_debug(struct client*, const char*, ...) LOG_ATTR_FMT;
219 3abf91b0 2021-02-07 op void log_request(struct client*, char*, size_t);
222 b2a6b613 2021-01-21 op void init_mime(struct mime*);
223 b2a6b613 2021-01-21 op void add_mime(struct mime*, const char*, const char*);
224 b2a6b613 2021-01-21 op void load_default_mime(struct mime*);
225 6119e13e 2021-01-19 op const char *mime(struct vhost*, const char*);
227 d3a08f4d 2021-01-17 op /* server.c */
228 c8b74339 2021-01-24 op const char *vhost_lang(struct vhost*, const char*);
229 c8b74339 2021-01-24 op const char *vhost_default_mime(struct vhost*, const char*);
230 c8b74339 2021-01-24 op const char *vhost_index(struct vhost*, const char*);
231 252908e6 2021-01-24 op int vhost_auto_index(struct vhost*, const char*);
232 6abda252 2021-02-06 op int vhost_block_return(struct vhost*, const char*, int*, const char**);
233 6abda252 2021-02-06 op int vhost_strip(struct vhost*, const char*);
234 9b8f5ed2 2021-02-03 op void mark_nonblock(int);
235 d3a08f4d 2021-01-17 op void loop(struct tls*, int, int);
238 881a9dd9 2021-01-16 op int send_string(int, const char*);
239 881a9dd9 2021-01-16 op int recv_string(int, char**);
240 2fafa2d2 2021-02-01 op int send_iri(int, struct iri*);
241 2fafa2d2 2021-02-01 op int recv_iri(int, struct iri*);
242 2fafa2d2 2021-02-01 op void free_recvd_iri(struct iri*);
243 881a9dd9 2021-01-16 op int send_vhost(int, struct vhost*);
244 881a9dd9 2021-01-16 op int recv_vhost(int, struct vhost**);
245 881a9dd9 2021-01-16 op int send_fd(int, int);
246 881a9dd9 2021-01-16 op int recv_fd(int);
247 4e2e2ab1 2021-02-03 op int executor_main(void);
249 dafb57b8 2021-01-15 op /* sandbox.c */
250 33ac26a0 2021-01-21 op void sandbox(void);
253 ef04b551 2021-01-09 op int valid_multibyte_utf8(struct parser*);
254 3300cbe0 2021-01-27 op char *utf8_nth(char*, size_t);
257 3c1cf9d0 2021-01-11 op int parse_iri(char*, struct iri*, const char**);
258 c4f682f8 2021-01-27 op int trim_req_iri(char*, const char **);
259 2fafa2d2 2021-02-01 op int serialize_iri(struct iri*, char*, size_t);
262 a2fd8013 2021-01-29 op int puny_decode(const char*, char*, size_t, const char**);
264 44ee1bac 2021-01-27 op /* utils.c */
265 ca21e100 2021-02-04 op void block_signals(void);
266 ca21e100 2021-02-04 op void unblock_signals(void);
267 44ee1bac 2021-01-27 op int starts_with(const char*, const char*);
268 44ee1bac 2021-01-27 op int ends_with(const char*, const char*);
269 44ee1bac 2021-01-27 op ssize_t filesize(int);
270 2fafa2d2 2021-02-01 op char *absolutify_path(const char*);
271 ca21e100 2021-02-04 op char *xstrdup(const char*);
272 3abf91b0 2021-02-07 op void gen_certificate(const char*, const char*, const char*);