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 488f059a 2020-12-24 op #include <arpa/inet.h>
 21 488f059a 2020-12-24 op #include <netinet/in.h>
 22 28778244 2021-01-11 op #include <sys/socket.h>
 23 488f059a 2020-12-24 op 
 24 488f059a 2020-12-24 op #include <poll.h>
 25 488f059a 2020-12-24 op #include <stdio.h>
 26 488f059a 2020-12-24 op #include <stdlib.h>
 27 488f059a 2020-12-24 op #include <syslog.h>
 28 488f059a 2020-12-24 op #include <tls.h>
 29 488f059a 2020-12-24 op #include <unistd.h>
 30 488f059a 2020-12-24 op 
 31 488f059a 2020-12-24 op #ifndef __OpenBSD__
 32 488f059a 2020-12-24 op # define pledge(a, b) 0
 33 488f059a 2020-12-24 op # define unveil(a, b) 0
 34 488f059a 2020-12-24 op #endif
 35 488f059a 2020-12-24 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 488f059a 2020-12-24 op #define TEMP_FAILURE	40
 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
 50 488f059a 2020-12-24 op 
 51 488f059a 2020-12-24 op #define MAX_USERS	64
 52 488f059a 2020-12-24 op 
 53 15902770 2021-01-15 op #define HOSTSLEN	64
 54 15902770 2021-01-15 op 
 55 15902770 2021-01-15 op struct vhost {
 56 15902770 2021-01-15 op 	const char	*domain;
 57 15902770 2021-01-15 op 	const char	*cert;
 58 15902770 2021-01-15 op 	const char	*key;
 59 15902770 2021-01-15 op 	const char	*dir;
 60 15902770 2021-01-15 op 	const char	*cgi;
 61 15902770 2021-01-15 op 	int		 dirfd;
 62 15902770 2021-01-15 op };
 63 15902770 2021-01-15 op 
 64 15902770 2021-01-15 op extern struct vhost hosts[HOSTSLEN];
 65 15902770 2021-01-15 op 
 66 15902770 2021-01-15 op struct conf {
 67 15902770 2021-01-15 op 	int	foreground;
 68 15902770 2021-01-15 op 	int	port;
 69 15902770 2021-01-15 op 	int	ipv6;
 70 15902770 2021-01-15 op };
 71 15902770 2021-01-15 op 
 72 15902770 2021-01-15 op extern struct conf conf;
 73 15902770 2021-01-15 op 
 74 488f059a 2020-12-24 op enum {
 75 9862b637 2021-01-13 op 	S_HANDSHAKE,
 76 488f059a 2020-12-24 op 	S_OPEN,
 77 488f059a 2020-12-24 op 	S_INITIALIZING,
 78 488f059a 2020-12-24 op 	S_SENDING,
 79 488f059a 2020-12-24 op 	S_CLOSING,
 80 488f059a 2020-12-24 op };
 81 488f059a 2020-12-24 op 
 82 488f059a 2020-12-24 op struct client {
 83 488f059a 2020-12-24 op 	struct tls	*ctx;
 84 488f059a 2020-12-24 op 	int		 state;
 85 488f059a 2020-12-24 op 	int		 code;
 86 488f059a 2020-12-24 op 	const char	*meta;
 87 488f059a 2020-12-24 op 	int		 fd, waiting_on_child;
 88 488f059a 2020-12-24 op 	pid_t		 child;
 89 488f059a 2020-12-24 op 	char		 sbuf[1024];	  /* static buffer */
 90 488f059a 2020-12-24 op 	void		*buf, *i;	  /* mmap buffer */
 91 488f059a 2020-12-24 op 	ssize_t		 len, off;	  /* mmap/static buffer  */
 92 488f059a 2020-12-24 op 	int		 af;
 93 709d6e5e 2021-01-10 op 	struct sockaddr_storage	 addr;
 94 15902770 2021-01-15 op 	struct vhost	*host;	/* host he's talking to */
 95 488f059a 2020-12-24 op };
 96 488f059a 2020-12-24 op 
 97 3c1cf9d0 2021-01-11 op struct iri {
 98 33d32d1f 2020-12-25 op 	char		*schema;
 99 33d32d1f 2020-12-25 op 	char		*host;
100 33d32d1f 2020-12-25 op 	char		*port;
101 33d32d1f 2020-12-25 op 	uint16_t	 port_no;
102 33d32d1f 2020-12-25 op 	char		*path;
103 33d32d1f 2020-12-25 op 	char		*query;
104 33d32d1f 2020-12-25 op 	char		*fragment;
105 33d32d1f 2020-12-25 op };
106 33d32d1f 2020-12-25 op 
107 ef04b551 2021-01-09 op struct parser {
108 3c1cf9d0 2021-01-11 op 	char		*iri;
109 3c1cf9d0 2021-01-11 op 	struct iri	*parsed;
110 ef04b551 2021-01-09 op 	const char	*err;
111 ef04b551 2021-01-09 op };
112 ef04b551 2021-01-09 op 
113 488f059a 2020-12-24 op enum {
114 488f059a 2020-12-24 op 	FILE_EXISTS,
115 488f059a 2020-12-24 op 	FILE_EXECUTABLE,
116 488f059a 2020-12-24 op 	FILE_DIRECTORY,
117 488f059a 2020-12-24 op 	FILE_MISSING,
118 488f059a 2020-12-24 op };
119 488f059a 2020-12-24 op 
120 33d32d1f 2020-12-25 op /* gmid.c */
121 4a28dd01 2020-12-28 op void		 sig_handler(int);
122 488f059a 2020-12-24 op int		 starts_with(const char*, const char*);
123 488f059a 2020-12-24 op 
124 488f059a 2020-12-24 op int		 start_reply(struct pollfd*, struct client*, int, const char*);
125 3d9a1c73 2020-12-28 op ssize_t		 filesize(int);
126 488f059a 2020-12-24 op const char	*path_ext(const char*);
127 488f059a 2020-12-24 op const char	*mime(const char*);
128 488f059a 2020-12-24 op int		 check_path(struct client*, const char*, int*);
129 488f059a 2020-12-24 op int		 check_for_cgi(char *, char*, struct pollfd*, struct client*);
130 488f059a 2020-12-24 op int		 open_file(char*, char*, struct pollfd*, struct client*);
131 488f059a 2020-12-24 op int		 start_cgi(const char*, const char*, const char*, struct pollfd*, struct client*);
132 6c6c7a0e 2020-12-28 op void		 cgi_poll_on_child(struct pollfd*, struct client*);
133 6c6c7a0e 2020-12-28 op void		 cgi_poll_on_client(struct pollfd*, struct client*);
134 488f059a 2020-12-24 op void		 handle_cgi(struct pollfd*, struct client*);
135 488f059a 2020-12-24 op void		 send_file(char*, char*, struct pollfd*, struct client*);
136 488f059a 2020-12-24 op void		 send_dir(char*, struct pollfd*, struct client*);
137 9862b637 2021-01-13 op void		 handle_handshake(struct pollfd*, struct client*);
138 9862b637 2021-01-13 op void		 handle_open_conn(struct pollfd*, struct client*);
139 488f059a 2020-12-24 op void		 handle(struct pollfd*, struct client*);
140 488f059a 2020-12-24 op 
141 488f059a 2020-12-24 op void		 mark_nonblock(int);
142 488f059a 2020-12-24 op int		 make_soket(int);
143 488f059a 2020-12-24 op void		 do_accept(int, struct tls*, struct pollfd*, struct client*);
144 488f059a 2020-12-24 op void		 goodbye(struct pollfd*, struct client*);
145 33756bd2 2021-01-10 op void		 loop(struct tls*, int, int);
146 488f059a 2020-12-24 op 
147 15902770 2021-01-15 op char		*absolutify_path(const char*);
148 15902770 2021-01-15 op void		 yyerror(const char*);
149 15902770 2021-01-15 op int		 parse_portno(const char*);
150 15902770 2021-01-15 op void		 parse_conf(const char*);
151 15902770 2021-01-15 op void		 load_vhosts(struct tls_config*);
152 15902770 2021-01-15 op void		 sandbox();
153 15902770 2021-01-15 op 
154 488f059a 2020-12-24 op void		 usage(const char*);
155 488f059a 2020-12-24 op 
156 15902770 2021-01-15 op extern FILE *yyin;
157 15902770 2021-01-15 op extern int yylineno;
158 15902770 2021-01-15 op extern int yyparse(void);
159 15902770 2021-01-15 op extern int yylex(void);
160 15902770 2021-01-15 op 
161 ef04b551 2021-01-09 op /* utf8.c */
162 ef04b551 2021-01-09 op int		 valid_multibyte_utf8(struct parser*);
163 ef04b551 2021-01-09 op 
164 3c1cf9d0 2021-01-11 op /* iri.c */
165 3c1cf9d0 2021-01-11 op int		 parse_iri(char*, struct iri*, const char**);
166 3c1cf9d0 2021-01-11 op int		 trim_req_iri(char*);
167 33d32d1f 2020-12-25 op 
168 488f059a 2020-12-24 op #endif