1 /*
2  * Copyright (c) 2021 Matthias Schmidt <xhr@giessen.ccc.de>
3  *
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.
7  *
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.
15  */
16 
17 #ifndef _TWIND_H
18 #define _TWIND_H
19 
20 #include <netinet/in.h>
21 
22 #include <openssl/ssl.h>
23 
24 #include <signal.h>
25 
26 #define VERSION "2021.a"
27 #define MAXREQLEN 1025
28 #define _PATH_TWIND_ACCESS_LOG "logs/access.log"
29 #define _PATH_TWIND_ERROR_LOG "logs/error.log"
30 
31 enum status_codes {
32 	STATUS_INPUT = 10,
33 	STATUS_SENSITIVE_INPUT = 11,
34 	STATUS_SUCCESS = 20,
35 	STATUS_REDIRECT_TEMP = 30,
36 	STATUS_REDIRECT_PERM = 31,
37 	STATUS_TEMP_UNAVAILABLE = 40,
38 	STATUS_SERVER_UNAVAILABLE = 41,
39 	STATUS_CGI_ERROR = 42,
40 	STATUS_PROXY_ERROR = 43,
41 	STATUS_SLOW_DOWN = 44,
42 	STATUS_PERM_FAILURE = 50,
43 	STATUS_NOT_FOUND = 51,
44 	STATUS_GONE = 52,
45 	STATUS_PROXY_REQUEST_REFUSED = 53,
46 	STATUS_BAD_REQUEST = 59,
47 	STATUS_CLIENT_CERT_REQUIRED = 60,
48 	STATUS_CERT_NOT_AUTHORIZED = 61,
49 	STATUS_CERT_NOT_VALID = 62,
50 };
51 
52 struct client_connection {
53 	SSL *ssl_peer;
54 	char client_addr[INET6_ADDRSTRLEN];
55 };
56 
57 static volatile sig_atomic_t reload_log_files = 0;
58 
59 /* gemini.c */
60 int check_gemini_file(const char *);
61 int send_response(SSL*, int, const char *, const char *);
62 int send_non_success_response(SSL*, int);
63 
64 /* request.c */
65 int get_path_from_request(char *, char *);
66 
67 /* mime.c */
68 char* get_file_extension(const char*);
69 char* get_mime_type(const char *);
70 
71 /* util.c */
72 void* xmalloc(size_t);
73 char* xstrdup(const char *);
74 size_t strlcpy(char *, const char *, size_t);
75 
76 /* log.c */
77 void open_twind_logs(void);
78 void close_twind_logs(void);
79 void log_access(const struct client_connection *, const char *, ...);
80 void log_error(const struct client_connection *, const char *, ...);
81 void user_log(int, const char *, ...);
82 
83 #endif