1 d5aba4c7 2020-12-24 op /*
  2 d5aba4c7 2020-12-24 op  * Copyright (c) 2020 Omar Polo <op@omarpolo.com>
  3 d5aba4c7 2020-12-24 op  *
  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.
  7 d5aba4c7 2020-12-24 op  *
  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.
 15 d5aba4c7 2020-12-24 op  */
 16 d5aba4c7 2020-12-24 op 
 17 488f059a 2020-12-24 op #ifndef GMID_H
 18 488f059a 2020-12-24 op #define GMID_H
 19 488f059a 2020-12-24 op 
 20 252908e6 2021-01-24 op #include <sys/socket.h>
 21 252908e6 2021-01-24 op #include <sys/types.h>
 22 252908e6 2021-01-24 op 
 23 488f059a 2020-12-24 op #include <arpa/inet.h>
 24 488f059a 2020-12-24 op #include <netinet/in.h>
 25 488f059a 2020-12-24 op 
 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>
 33 488f059a 2020-12-24 op 
 34 12042ad7 2021-01-21 op #include "config.h"
 35 12042ad7 2021-01-21 op 
 36 488f059a 2020-12-24 op #ifndef INFTIM
 37 488f059a 2020-12-24 op # define INFTIM -1
 38 488f059a 2020-12-24 op #endif
 39 488f059a 2020-12-24 op 
 40 488f059a 2020-12-24 op #define GEMINI_URL_LEN (1024+3)	/* URL max len + \r\n + \0 */
 41 488f059a 2020-12-24 op 
 42 488f059a 2020-12-24 op /* large enough to hold a copy of a gemini URL and still have extra room */
 43 488f059a 2020-12-24 op #define PATHBUF		2048
 44 488f059a 2020-12-24 op 
 45 488f059a 2020-12-24 op #define SUCCESS		20
 46 0be51733 2021-01-20 op #define TEMP_REDIRECT	30
 47 488f059a 2020-12-24 op #define TEMP_FAILURE	40
 48 488f059a 2020-12-24 op #define NOT_FOUND	51
 49 7b1d9790 2021-01-11 op #define PROXY_REFUSED	53
 50 488f059a 2020-12-24 op #define BAD_REQUEST	59
 51 488f059a 2020-12-24 op 
 52 488f059a 2020-12-24 op #define MAX_USERS	64
 53 488f059a 2020-12-24 op 
 54 15902770 2021-01-15 op #define HOSTSLEN	64
 55 c8b74339 2021-01-24 op #define LOCLEN		32
 56 15902770 2021-01-15 op 
 57 dafb57b8 2021-01-15 op #define LOGE(c, fmt, ...) logs(LOG_ERR,     c, fmt, __VA_ARGS__)
 58 dafb57b8 2021-01-15 op #define LOGW(c, fmt, ...) logs(LOG_WARNING, c, fmt, __VA_ARGS__)
 59 dafb57b8 2021-01-15 op #define LOGN(c, fmt, ...) logs(LOG_NOTICE,  c, fmt, __VA_ARGS__)
 60 dafb57b8 2021-01-15 op #define LOGI(c, fmt, ...) logs(LOG_INFO,    c, fmt, __VA_ARGS__)
 61 dafb57b8 2021-01-15 op #define LOGD(c, fmt, ...) logs(LOG_DEBUG,   c, fmt, __VA_ARGS__)
 62 dafb57b8 2021-01-15 op 
 63 c8b74339 2021-01-24 op struct location {
 64 c8b74339 2021-01-24 op 	char		*match;
 65 c8b74339 2021-01-24 op 	char		*lang;
 66 c8b74339 2021-01-24 op 	char		*default_mime;
 67 c8b74339 2021-01-24 op 	char		*index;
 68 252908e6 2021-01-24 op 	int		 auto_index; /* 0 auto, -1 off, 1 on */
 69 c8b74339 2021-01-24 op };
 70 c8b74339 2021-01-24 op 
 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 15902770 2021-01-15 op 	int		 dirfd;
 78 c8b74339 2021-01-24 op 	struct location	 locations[LOCLEN];
 79 15902770 2021-01-15 op };
 80 15902770 2021-01-15 op 
 81 15902770 2021-01-15 op extern struct vhost hosts[HOSTSLEN];
 82 15902770 2021-01-15 op 
 83 a010b0dd 2021-01-18 op struct etm {			/* extension to mime */
 84 a010b0dd 2021-01-18 op 	const char	*mime;
 85 a010b0dd 2021-01-18 op 	const char	*ext;
 86 a010b0dd 2021-01-18 op };
 87 a010b0dd 2021-01-18 op 
 88 b2a6b613 2021-01-21 op struct mime {
 89 a010b0dd 2021-01-18 op 	struct etm	*t;
 90 a010b0dd 2021-01-18 op 	size_t		len;
 91 a010b0dd 2021-01-18 op 	size_t		cap;
 92 a010b0dd 2021-01-18 op };
 93 a010b0dd 2021-01-18 op 
 94 15902770 2021-01-15 op struct conf {
 95 a010b0dd 2021-01-18 op 	int		foreground;
 96 a010b0dd 2021-01-18 op 	int		port;
 97 a010b0dd 2021-01-18 op 	int		ipv6;
 98 a010b0dd 2021-01-18 op 	uint32_t	protos;
 99 b2a6b613 2021-01-21 op 	struct mime	mime;
100 15902770 2021-01-15 op };
101 15902770 2021-01-15 op 
102 15902770 2021-01-15 op extern struct conf conf;
103 881a9dd9 2021-01-16 op extern int exfd;
104 15902770 2021-01-15 op 
105 0be51733 2021-01-20 op struct iri {
106 0be51733 2021-01-20 op 	char		*schema;
107 0be51733 2021-01-20 op 	char		*host;
108 0be51733 2021-01-20 op 	char		*port;
109 0be51733 2021-01-20 op 	uint16_t	 port_no;
110 0be51733 2021-01-20 op 	char		*path;
111 0be51733 2021-01-20 op 	char		*query;
112 0be51733 2021-01-20 op 	char		*fragment;
113 0be51733 2021-01-20 op };
114 0be51733 2021-01-20 op 
115 0be51733 2021-01-20 op struct parser {
116 0be51733 2021-01-20 op 	char		*iri;
117 0be51733 2021-01-20 op 	struct iri	*parsed;
118 0be51733 2021-01-20 op 	const char	*err;
119 0be51733 2021-01-20 op };
120 0be51733 2021-01-20 op 
121 488f059a 2020-12-24 op enum {
122 9862b637 2021-01-13 op 	S_HANDSHAKE,
123 488f059a 2020-12-24 op 	S_OPEN,
124 488f059a 2020-12-24 op 	S_INITIALIZING,
125 a87f6625 2021-01-24 op 	S_SENDING_FILE,
126 252908e6 2021-01-24 op 	S_SENDING_DIR,
127 a87f6625 2021-01-24 op 	S_SENDING_CGI,
128 488f059a 2020-12-24 op 	S_CLOSING,
129 488f059a 2020-12-24 op };
130 488f059a 2020-12-24 op 
131 488f059a 2020-12-24 op struct client {
132 488f059a 2020-12-24 op 	struct tls	*ctx;
133 0be51733 2021-01-20 op 	char		 req[GEMINI_URL_LEN];
134 0be51733 2021-01-20 op 	struct iri	 iri;
135 a87f6625 2021-01-24 op 	int		 state, next;
136 488f059a 2020-12-24 op 	int		 code;
137 488f059a 2020-12-24 op 	const char	*meta;
138 488f059a 2020-12-24 op 	int		 fd, waiting_on_child;
139 488f059a 2020-12-24 op 	char		 sbuf[1024];	  /* static buffer */
140 488f059a 2020-12-24 op 	void		*buf, *i;	  /* mmap buffer */
141 488f059a 2020-12-24 op 	ssize_t		 len, off;	  /* mmap/static buffer  */
142 252908e6 2021-01-24 op 	DIR		*dir;
143 709d6e5e 2021-01-10 op 	struct sockaddr_storage	 addr;
144 f7b816dc 2021-01-15 op 	struct vhost	*host;	/* host she's talking to */
145 488f059a 2020-12-24 op };
146 488f059a 2020-12-24 op 
147 488f059a 2020-12-24 op enum {
148 488f059a 2020-12-24 op 	FILE_EXISTS,
149 488f059a 2020-12-24 op 	FILE_EXECUTABLE,
150 488f059a 2020-12-24 op 	FILE_DIRECTORY,
151 488f059a 2020-12-24 op 	FILE_MISSING,
152 488f059a 2020-12-24 op };
153 488f059a 2020-12-24 op 
154 33d32d1f 2020-12-25 op /* gmid.c */
155 dafb57b8 2021-01-15 op 
156 d3a08f4d 2021-01-17 op __attribute__((format (printf, 1, 2)))
157 d3a08f4d 2021-01-17 op __attribute__((__noreturn__))
158 d3a08f4d 2021-01-17 op void fatal(const char*, ...);
159 d3a08f4d 2021-01-17 op 
160 d3a08f4d 2021-01-17 op __attribute__((format (printf, 3, 4)))
161 d3a08f4d 2021-01-17 op void logs(int, struct client*, const char*, ...);
162 0be51733 2021-01-20 op void log_request(struct client*, char*, size_t);
163 d3a08f4d 2021-01-17 op 
164 4a28dd01 2020-12-28 op void		 sig_handler(int);
165 488f059a 2020-12-24 op int		 starts_with(const char*, const char*);
166 f77a8c86 2021-01-21 op int		 ends_with(const char*, const char*);
167 3d9a1c73 2020-12-28 op ssize_t		 filesize(int);
168 15902770 2021-01-15 op char		*absolutify_path(const char*);
169 15902770 2021-01-15 op void		 yyerror(const char*);
170 15902770 2021-01-15 op int		 parse_portno(const char*);
171 15902770 2021-01-15 op void		 parse_conf(const char*);
172 15902770 2021-01-15 op void		 load_vhosts(struct tls_config*);
173 33ac26a0 2021-01-21 op int		 make_socket(int, int);
174 33ac26a0 2021-01-21 op int		 listener_main(void);
175 c8b74339 2021-01-24 op void		 init_config(void);
176 488f059a 2020-12-24 op void		 usage(const char*);
177 488f059a 2020-12-24 op 
178 f7b816dc 2021-01-15 op /* provided by lex/yacc */
179 15902770 2021-01-15 op extern FILE *yyin;
180 15902770 2021-01-15 op extern int yylineno;
181 15902770 2021-01-15 op extern int yyparse(void);
182 15902770 2021-01-15 op extern int yylex(void);
183 15902770 2021-01-15 op 
184 0fbe79b3 2021-01-18 op /* mime.c */
185 b2a6b613 2021-01-21 op void		 init_mime(struct mime*);
186 b2a6b613 2021-01-21 op void		 add_mime(struct mime*, const char*, const char*);
187 b2a6b613 2021-01-21 op void		 load_default_mime(struct mime*);
188 6119e13e 2021-01-19 op const char	*mime(struct vhost*, const char*);
189 0fbe79b3 2021-01-18 op 
190 d3a08f4d 2021-01-17 op /* server.c */
191 c8b74339 2021-01-24 op const char	*vhost_lang(struct vhost*, const char*);
192 c8b74339 2021-01-24 op const char	*vhost_default_mime(struct vhost*, const char*);
193 c8b74339 2021-01-24 op const char	*vhost_index(struct vhost*, const char*);
194 252908e6 2021-01-24 op int		 vhost_auto_index(struct vhost*, const char*);
195 d3a08f4d 2021-01-17 op int		 check_path(struct client*, const char*, int*);
196 07b0a142 2021-01-24 op void		 open_file(struct pollfd*, struct client*);
197 252908e6 2021-01-24 op void		 load_file(struct pollfd*, struct client*);
198 07b0a142 2021-01-24 op void		 check_for_cgi(char *, char*, struct pollfd*, struct client*);
199 d3a08f4d 2021-01-17 op void		 mark_nonblock(int);
200 d3a08f4d 2021-01-17 op void		 handle_handshake(struct pollfd*, struct client*);
201 d3a08f4d 2021-01-17 op void		 handle_open_conn(struct pollfd*, struct client*);
202 a87f6625 2021-01-24 op void		 start_reply(struct pollfd*, struct client*, int, const char*);
203 07b0a142 2021-01-24 op void		 start_cgi(const char*, const char*, const char*, struct pollfd*, struct client*);
204 0be51733 2021-01-20 op void		 send_file(struct pollfd*, struct client*);
205 252908e6 2021-01-24 op void		 open_dir(struct pollfd*, struct client*);
206 252908e6 2021-01-24 op void		 redirect_canonical_dir(struct pollfd*, struct client*);
207 252908e6 2021-01-24 op int		 read_next_dir_entry(struct client*);
208 252908e6 2021-01-24 op void		 send_directory_listing(struct pollfd*, struct client*);
209 d3a08f4d 2021-01-17 op void		 cgi_poll_on_child(struct pollfd*, struct client*);
210 d3a08f4d 2021-01-17 op void		 cgi_poll_on_client(struct pollfd*, struct client*);
211 d3a08f4d 2021-01-17 op void		 handle_cgi(struct pollfd*, struct client*);
212 36162ed8 2021-01-22 op void		 close_conn(struct pollfd*, struct client*);
213 d3a08f4d 2021-01-17 op void		 do_accept(int, struct tls*, struct pollfd*, struct client*);
214 d3a08f4d 2021-01-17 op void		 handle(struct pollfd*, struct client*);
215 d3a08f4d 2021-01-17 op void		 loop(struct tls*, int, int);
216 d3a08f4d 2021-01-17 op 
217 881a9dd9 2021-01-16 op /* ex.c */
218 881a9dd9 2021-01-16 op int		 send_string(int, const char*);
219 881a9dd9 2021-01-16 op int		 recv_string(int, char**);
220 881a9dd9 2021-01-16 op int		 send_vhost(int, struct vhost*);
221 881a9dd9 2021-01-16 op int		 recv_vhost(int, struct vhost**);
222 881a9dd9 2021-01-16 op int		 send_fd(int, int);
223 881a9dd9 2021-01-16 op int		 recv_fd(int);
224 881a9dd9 2021-01-16 op int		 executor_main(int);
225 881a9dd9 2021-01-16 op 
226 dafb57b8 2021-01-15 op /* sandbox.c */
227 33ac26a0 2021-01-21 op void		 sandbox(void);
228 dafb57b8 2021-01-15 op 
229 ef04b551 2021-01-09 op /* utf8.c */
230 ef04b551 2021-01-09 op int		 valid_multibyte_utf8(struct parser*);
231 ef04b551 2021-01-09 op 
232 3c1cf9d0 2021-01-11 op /* iri.c */
233 3c1cf9d0 2021-01-11 op int		 parse_iri(char*, struct iri*, const char**);
234 3c1cf9d0 2021-01-11 op int		 trim_req_iri(char*);
235 33d32d1f 2020-12-25 op 
236 488f059a 2020-12-24 op #endif