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 488f059a 2020-12-24 op #include <stdio.h>
29 488f059a 2020-12-24 op #include <stdlib.h>
30 488f059a 2020-12-24 op #include <syslog.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 dafb57b8 2021-01-15 op #define LOGE(c, fmt, ...) logs(LOG_ERR, c, fmt, __VA_ARGS__)
60 dafb57b8 2021-01-15 op #define LOGW(c, fmt, ...) logs(LOG_WARNING, c, fmt, __VA_ARGS__)
61 dafb57b8 2021-01-15 op #define LOGN(c, fmt, ...) logs(LOG_NOTICE, c, fmt, __VA_ARGS__)
62 dafb57b8 2021-01-15 op #define LOGI(c, fmt, ...) logs(LOG_INFO, c, fmt, __VA_ARGS__)
63 dafb57b8 2021-01-15 op #define LOGD(c, fmt, ...) logs(LOG_DEBUG, c, fmt, __VA_ARGS__)
65 c8b74339 2021-01-24 op struct location {
66 fe5967cd 2021-01-27 op const char *match;
67 fe5967cd 2021-01-27 op const char *lang;
68 fe5967cd 2021-01-27 op const char *default_mime;
69 fe5967cd 2021-01-27 op const char *index;
70 252908e6 2021-01-24 op int auto_index; /* 0 auto, -1 off, 1 on */
73 15902770 2021-01-15 op struct vhost {
74 15902770 2021-01-15 op const char *domain;
75 15902770 2021-01-15 op const char *cert;
76 15902770 2021-01-15 op const char *key;
77 15902770 2021-01-15 op const char *dir;
78 15902770 2021-01-15 op const char *cgi;
81 6016a593 2021-01-30 op /* the first location rule is always '*' and holds the default
82 6016a593 2021-01-30 op * settings for the vhost, from locations[1] onwards there are
83 6016a593 2021-01-30 op * the "real" location rules specified in the configuration. */
84 c8b74339 2021-01-24 op struct location locations[LOCLEN];
87 15902770 2021-01-15 op extern struct vhost hosts[HOSTSLEN];
89 a010b0dd 2021-01-18 op struct etm { /* extension to mime */
90 a010b0dd 2021-01-18 op const char *mime;
91 a010b0dd 2021-01-18 op const char *ext;
95 a010b0dd 2021-01-18 op struct etm *t;
100 15902770 2021-01-15 op struct conf {
103 ae08ec7d 2021-01-25 op uint32_t protos;
104 ae08ec7d 2021-01-25 op struct mime mime;
105 ae08ec7d 2021-01-25 op char *chroot;
109 15902770 2021-01-15 op extern struct conf conf;
110 881a9dd9 2021-01-16 op extern int exfd;
113 0be51733 2021-01-20 op char *schema;
116 0be51733 2021-01-20 op uint16_t port_no;
119 0be51733 2021-01-20 op char *fragment;
122 0be51733 2021-01-20 op struct parser {
124 0be51733 2021-01-20 op struct iri *parsed;
125 0be51733 2021-01-20 op const char *err;
128 112802ea 2021-02-01 op struct client;
130 112802ea 2021-02-01 op typedef void (*statefn)(struct pollfd*, struct client*);
133 92da8285 2021-02-01 op * DFA: handle_handshake is the initial state, close_conn the final.
134 5f715ce4 2021-02-02 op * Sometimes we have an enter_* function to handle the state switch.
136 92da8285 2021-02-01 op * handle_handshake -> handle_open_conn
137 92da8285 2021-02-01 op * handle_handshake -> close_conn // on err
139 35744950 2021-02-01 op * handle_open_conn -> handle_cgi_reply // via open_file/dir/...
140 5f715ce4 2021-02-02 op * handle_open_conn -> handle_dirlist // ...same
141 92da8285 2021-02-01 op * handle_open_conn -> send_file // ...same
142 35744950 2021-02-01 op * handle_open_conn -> start_reply // on error
144 35744950 2021-02-01 op * handle_cgi_reply -> handle_cgi // after logging the CGI reply
145 35744950 2021-02-01 op * handle_cgi_reply -> start_reply // on error
147 92da8285 2021-02-01 op * handle_cgi -> close_conn
149 5f715ce4 2021-02-02 op * handle_dirlist -> send_directory_listing
150 5f715ce4 2021-02-02 op * handle_dirlist -> close_conn // on error
152 92da8285 2021-02-01 op * send_directory_listing -> close_conn
154 92da8285 2021-02-01 op * send_file -> close_conn
156 488f059a 2020-12-24 op struct client {
157 488f059a 2020-12-24 op struct tls *ctx;
158 0be51733 2021-01-20 op char req[GEMINI_URL_LEN];
159 0be51733 2021-01-20 op struct iri iri;
160 3300cbe0 2021-01-27 op char domain[DOMAIN_NAME_LEN];
161 112802ea 2021-02-01 op statefn state, next;
163 488f059a 2020-12-24 op const char *meta;
164 488f059a 2020-12-24 op int fd, waiting_on_child;
165 488f059a 2020-12-24 op char sbuf[1024]; /* static buffer */
166 488f059a 2020-12-24 op void *buf, *i; /* mmap buffer */
167 488f059a 2020-12-24 op ssize_t len, off; /* mmap/static buffer */
169 709d6e5e 2021-01-10 op struct sockaddr_storage addr;
170 f7b816dc 2021-01-15 op struct vhost *host; /* host she's talking to */
175 488f059a 2020-12-24 op FILE_EXECUTABLE,
176 488f059a 2020-12-24 op FILE_DIRECTORY,
177 488f059a 2020-12-24 op FILE_MISSING,
181 d3a08f4d 2021-01-17 op __attribute__((format (printf, 1, 2)))
182 d3a08f4d 2021-01-17 op __attribute__((__noreturn__))
183 d3a08f4d 2021-01-17 op void fatal(const char*, ...);
185 d3a08f4d 2021-01-17 op __attribute__((format (printf, 3, 4)))
186 d3a08f4d 2021-01-17 op void logs(int, struct client*, const char*, ...);
187 0be51733 2021-01-20 op void log_request(struct client*, char*, size_t);
189 4a28dd01 2020-12-28 op void sig_handler(int);
190 8443bff7 2021-01-25 op void gen_certificate(const char*, const char*, const char*);
191 8443bff7 2021-01-25 op void mkdirs(const char*);
192 8443bff7 2021-01-25 op char *data_dir(void);
193 8443bff7 2021-01-25 op void load_local_cert(const char*, const char*);
194 ae08ec7d 2021-01-25 op void load_vhosts(void);
195 33ac26a0 2021-01-21 op int make_socket(int, int);
196 ae08ec7d 2021-01-25 op void setup_tls(void);
197 33ac26a0 2021-01-21 op int listener_main(void);
198 c8b74339 2021-01-24 op void init_config(void);
199 ae08ec7d 2021-01-25 op void drop_priv(void);
200 488f059a 2020-12-24 op void usage(const char*);
202 f7b816dc 2021-01-15 op /* provided by lex/yacc */
203 15902770 2021-01-15 op extern FILE *yyin;
204 15902770 2021-01-15 op extern int yylineno;
205 15902770 2021-01-15 op extern int yyparse(void);
206 15902770 2021-01-15 op extern int yylex(void);
208 13ed2fb6 2021-01-27 op void yyerror(const char*);
209 13ed2fb6 2021-01-27 op int parse_portno(const char*);
210 13ed2fb6 2021-01-27 op void parse_conf(const char*);
213 b2a6b613 2021-01-21 op void init_mime(struct mime*);
214 b2a6b613 2021-01-21 op void add_mime(struct mime*, const char*, const char*);
215 b2a6b613 2021-01-21 op void load_default_mime(struct mime*);
216 6119e13e 2021-01-19 op const char *mime(struct vhost*, const char*);
218 d3a08f4d 2021-01-17 op /* server.c */
219 c8b74339 2021-01-24 op const char *vhost_lang(struct vhost*, const char*);
220 c8b74339 2021-01-24 op const char *vhost_default_mime(struct vhost*, const char*);
221 c8b74339 2021-01-24 op const char *vhost_index(struct vhost*, const char*);
222 252908e6 2021-01-24 op int vhost_auto_index(struct vhost*, const char*);
223 d3a08f4d 2021-01-17 op int check_path(struct client*, const char*, int*);
224 07b0a142 2021-01-24 op void open_file(struct pollfd*, struct client*);
225 252908e6 2021-01-24 op void load_file(struct pollfd*, struct client*);
226 2fafa2d2 2021-02-01 op void check_for_cgi(struct pollfd*, struct client*);
227 d3a08f4d 2021-01-17 op void mark_nonblock(int);
228 d3a08f4d 2021-01-17 op void handle_handshake(struct pollfd*, struct client*);
229 d3a08f4d 2021-01-17 op void handle_open_conn(struct pollfd*, struct client*);
230 a87f6625 2021-01-24 op void start_reply(struct pollfd*, struct client*, int, const char*);
231 112802ea 2021-02-01 op void handle_start_reply(struct pollfd*, struct client*);
232 2fafa2d2 2021-02-01 op void start_cgi(const char*, const char*, struct pollfd*, struct client*);
233 0be51733 2021-01-20 op void send_file(struct pollfd*, struct client*);
234 252908e6 2021-01-24 op void open_dir(struct pollfd*, struct client*);
235 252908e6 2021-01-24 op void redirect_canonical_dir(struct pollfd*, struct client*);
236 5f715ce4 2021-02-02 op void enter_handle_dirlist(struct pollfd*, struct client*);
237 5f715ce4 2021-02-02 op void handle_dirlist(struct pollfd*, struct client*);
238 252908e6 2021-01-24 op int read_next_dir_entry(struct client*);
239 252908e6 2021-01-24 op void send_directory_listing(struct pollfd*, struct client*);
240 d3a08f4d 2021-01-17 op void cgi_poll_on_child(struct pollfd*, struct client*);
241 d3a08f4d 2021-01-17 op void cgi_poll_on_client(struct pollfd*, struct client*);
242 35744950 2021-02-01 op void handle_cgi_reply(struct pollfd*, struct client*);
243 d3a08f4d 2021-01-17 op void handle_cgi(struct pollfd*, struct client*);
244 36162ed8 2021-01-22 op void close_conn(struct pollfd*, struct client*);
245 d3a08f4d 2021-01-17 op void do_accept(int, struct tls*, struct pollfd*, struct client*);
246 d3a08f4d 2021-01-17 op void loop(struct tls*, int, int);
249 881a9dd9 2021-01-16 op int send_string(int, const char*);
250 881a9dd9 2021-01-16 op int recv_string(int, char**);
251 2fafa2d2 2021-02-01 op int send_iri(int, struct iri*);
252 2fafa2d2 2021-02-01 op int recv_iri(int, struct iri*);
253 2fafa2d2 2021-02-01 op void free_recvd_iri(struct iri*);
254 881a9dd9 2021-01-16 op int send_vhost(int, struct vhost*);
255 881a9dd9 2021-01-16 op int recv_vhost(int, struct vhost**);
256 881a9dd9 2021-01-16 op int send_fd(int, int);
257 881a9dd9 2021-01-16 op int recv_fd(int);
258 881a9dd9 2021-01-16 op int executor_main(int);
260 dafb57b8 2021-01-15 op /* sandbox.c */
261 33ac26a0 2021-01-21 op void sandbox(void);
264 ef04b551 2021-01-09 op int valid_multibyte_utf8(struct parser*);
265 3300cbe0 2021-01-27 op char *utf8_nth(char*, size_t);
268 3c1cf9d0 2021-01-11 op int parse_iri(char*, struct iri*, const char**);
269 c4f682f8 2021-01-27 op int trim_req_iri(char*, const char **);
270 2fafa2d2 2021-02-01 op int serialize_iri(struct iri*, char*, size_t);
273 a2fd8013 2021-01-29 op int puny_decode(const char*, char*, size_t, const char**);
275 44ee1bac 2021-01-27 op /* utils.c */
276 44ee1bac 2021-01-27 op int starts_with(const char*, const char*);
277 44ee1bac 2021-01-27 op int ends_with(const char*, const char*);
278 44ee1bac 2021-01-27 op ssize_t filesize(int);
279 2fafa2d2 2021-02-01 op char *absolutify_path(const char*);
