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 <syslog.h>
32 488f059a 2020-12-24 op #include <tls.h>
33 488f059a 2020-12-24 op #include <unistd.h>
35 12042ad7 2021-01-21 op #include "config.h"
37 488f059a 2020-12-24 op #ifndef INFTIM
38 488f059a 2020-12-24 op # define INFTIM -1
41 488f059a 2020-12-24 op #define GEMINI_URL_LEN (1024+3) /* URL max len + \r\n + \0 */
43 488f059a 2020-12-24 op #define SUCCESS 20
44 0be51733 2021-01-20 op #define TEMP_REDIRECT 30
45 488f059a 2020-12-24 op #define TEMP_FAILURE 40
46 35744950 2021-02-01 op #define CGI_ERROR 42
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
51 488f059a 2020-12-24 op #define MAX_USERS 64
53 15902770 2021-01-15 op #define HOSTSLEN 64
54 c8b74339 2021-01-24 op #define LOCLEN 32
56 35cf19e3 2021-01-28 op /* maximum hostname and label length, +1 for the NUL-terminator */
57 35cf19e3 2021-01-28 op #define DOMAIN_NAME_LEN (253+1)
58 35cf19e3 2021-01-28 op #define LABEL_LEN (63+1)
60 dafb57b8 2021-01-15 op #define LOGE(c, fmt, ...) logs(LOG_ERR, c, fmt, __VA_ARGS__)
61 dafb57b8 2021-01-15 op #define LOGW(c, fmt, ...) logs(LOG_WARNING, c, fmt, __VA_ARGS__)
62 dafb57b8 2021-01-15 op #define LOGN(c, fmt, ...) logs(LOG_NOTICE, c, fmt, __VA_ARGS__)
63 dafb57b8 2021-01-15 op #define LOGI(c, fmt, ...) logs(LOG_INFO, c, fmt, __VA_ARGS__)
64 dafb57b8 2021-01-15 op #define LOGD(c, fmt, ...) logs(LOG_DEBUG, c, fmt, __VA_ARGS__)
66 c8b74339 2021-01-24 op struct location {
67 fe5967cd 2021-01-27 op const char *match;
68 fe5967cd 2021-01-27 op const char *lang;
69 fe5967cd 2021-01-27 op const char *default_mime;
70 fe5967cd 2021-01-27 op const char *index;
71 252908e6 2021-01-24 op int auto_index; /* 0 auto, -1 off, 1 on */
74 15902770 2021-01-15 op struct vhost {
75 15902770 2021-01-15 op const char *domain;
76 15902770 2021-01-15 op const char *cert;
77 15902770 2021-01-15 op const char *key;
78 15902770 2021-01-15 op const char *dir;
79 15902770 2021-01-15 op const char *cgi;
82 6016a593 2021-01-30 op /* the first location rule is always '*' and holds the default
83 6016a593 2021-01-30 op * settings for the vhost, from locations[1] onwards there are
84 6016a593 2021-01-30 op * the "real" location rules specified in the configuration. */
85 c8b74339 2021-01-24 op struct location locations[LOCLEN];
88 15902770 2021-01-15 op extern struct vhost hosts[HOSTSLEN];
90 a010b0dd 2021-01-18 op struct etm { /* extension to mime */
91 a010b0dd 2021-01-18 op const char *mime;
92 a010b0dd 2021-01-18 op const char *ext;
96 a010b0dd 2021-01-18 op struct etm *t;
101 15902770 2021-01-15 op struct conf {
104 ae08ec7d 2021-01-25 op uint32_t protos;
105 ae08ec7d 2021-01-25 op struct mime mime;
106 ae08ec7d 2021-01-25 op char *chroot;
110 15902770 2021-01-15 op extern struct conf conf;
111 881a9dd9 2021-01-16 op extern int exfd;
113 ca21e100 2021-02-04 op extern volatile sig_atomic_t hupped;
116 0be51733 2021-01-20 op char *schema;
119 0be51733 2021-01-20 op uint16_t port_no;
122 0be51733 2021-01-20 op char *fragment;
125 0be51733 2021-01-20 op struct parser {
127 0be51733 2021-01-20 op struct iri *parsed;
128 0be51733 2021-01-20 op const char *err;
131 112802ea 2021-02-01 op struct client;
133 112802ea 2021-02-01 op typedef void (*statefn)(struct pollfd*, struct client*);
136 92da8285 2021-02-01 op * DFA: handle_handshake is the initial state, close_conn the final.
137 5f715ce4 2021-02-02 op * Sometimes we have an enter_* function to handle the state switch.
139 92da8285 2021-02-01 op * handle_handshake -> handle_open_conn
140 92da8285 2021-02-01 op * handle_handshake -> close_conn // on err
142 35744950 2021-02-01 op * handle_open_conn -> handle_cgi_reply // via open_file/dir/...
143 5f715ce4 2021-02-02 op * handle_open_conn -> handle_dirlist // ...same
144 92da8285 2021-02-01 op * handle_open_conn -> send_file // ...same
145 35744950 2021-02-01 op * handle_open_conn -> start_reply // on error
147 35744950 2021-02-01 op * handle_cgi_reply -> handle_cgi // after logging the CGI reply
148 35744950 2021-02-01 op * handle_cgi_reply -> start_reply // on error
150 92da8285 2021-02-01 op * handle_cgi -> close_conn
152 5f715ce4 2021-02-02 op * handle_dirlist -> send_directory_listing
153 5f715ce4 2021-02-02 op * handle_dirlist -> close_conn // on error
155 92da8285 2021-02-01 op * send_directory_listing -> close_conn
157 92da8285 2021-02-01 op * send_file -> close_conn
159 488f059a 2020-12-24 op struct client {
160 488f059a 2020-12-24 op struct tls *ctx;
161 0be51733 2021-01-20 op char req[GEMINI_URL_LEN];
162 0be51733 2021-01-20 op struct iri iri;
163 3300cbe0 2021-01-27 op char domain[DOMAIN_NAME_LEN];
164 112802ea 2021-02-01 op statefn state, next;
166 488f059a 2020-12-24 op const char *meta;
167 488f059a 2020-12-24 op int fd, waiting_on_child;
168 488f059a 2020-12-24 op char sbuf[1024]; /* static buffer */
169 488f059a 2020-12-24 op void *buf, *i; /* mmap buffer */
170 488f059a 2020-12-24 op ssize_t len, off; /* mmap/static buffer */
172 709d6e5e 2021-01-10 op struct sockaddr_storage addr;
173 f7b816dc 2021-01-15 op struct vhost *host; /* host she's talking to */
178 488f059a 2020-12-24 op FILE_EXECUTABLE,
179 488f059a 2020-12-24 op FILE_DIRECTORY,
180 488f059a 2020-12-24 op FILE_MISSING,
184 d3a08f4d 2021-01-17 op __attribute__((format (printf, 1, 2)))
185 d3a08f4d 2021-01-17 op __attribute__((__noreturn__))
186 d3a08f4d 2021-01-17 op void fatal(const char*, ...);
188 d3a08f4d 2021-01-17 op __attribute__((format (printf, 3, 4)))
189 d3a08f4d 2021-01-17 op void logs(int, struct client*, const char*, ...);
190 0be51733 2021-01-20 op void log_request(struct client*, char*, size_t);
192 4a28dd01 2020-12-28 op void sig_handler(int);
193 8443bff7 2021-01-25 op void gen_certificate(const char*, const char*, const char*);
194 8443bff7 2021-01-25 op void mkdirs(const char*);
195 8443bff7 2021-01-25 op char *data_dir(void);
196 8443bff7 2021-01-25 op void load_local_cert(const char*, const char*);
197 ae08ec7d 2021-01-25 op void load_vhosts(void);
198 33ac26a0 2021-01-21 op int make_socket(int, int);
199 ae08ec7d 2021-01-25 op void setup_tls(void);
200 c8b74339 2021-01-24 op void init_config(void);
201 ca21e100 2021-02-04 op void free_config(void);
202 ae08ec7d 2021-01-25 op void drop_priv(void);
203 488f059a 2020-12-24 op void usage(const char*);
205 f7b816dc 2021-01-15 op /* provided by lex/yacc */
206 15902770 2021-01-15 op extern FILE *yyin;
207 15902770 2021-01-15 op extern int yylineno;
208 15902770 2021-01-15 op extern int yyparse(void);
209 15902770 2021-01-15 op extern int yylex(void);
211 13ed2fb6 2021-01-27 op void yyerror(const char*);
212 13ed2fb6 2021-01-27 op int parse_portno(const char*);
213 13ed2fb6 2021-01-27 op void parse_conf(const char*);
216 b2a6b613 2021-01-21 op void init_mime(struct mime*);
217 b2a6b613 2021-01-21 op void add_mime(struct mime*, const char*, const char*);
218 b2a6b613 2021-01-21 op void load_default_mime(struct mime*);
219 6119e13e 2021-01-19 op const char *mime(struct vhost*, const char*);
221 d3a08f4d 2021-01-17 op /* server.c */
222 c8b74339 2021-01-24 op const char *vhost_lang(struct vhost*, const char*);
223 c8b74339 2021-01-24 op const char *vhost_default_mime(struct vhost*, const char*);
224 c8b74339 2021-01-24 op const char *vhost_index(struct vhost*, const char*);
225 252908e6 2021-01-24 op int vhost_auto_index(struct vhost*, const char*);
226 9b8f5ed2 2021-02-03 op void mark_nonblock(int);
227 d3a08f4d 2021-01-17 op void loop(struct tls*, int, int);
230 881a9dd9 2021-01-16 op int send_string(int, const char*);
231 881a9dd9 2021-01-16 op int recv_string(int, char**);
232 2fafa2d2 2021-02-01 op int send_iri(int, struct iri*);
233 2fafa2d2 2021-02-01 op int recv_iri(int, struct iri*);
234 2fafa2d2 2021-02-01 op void free_recvd_iri(struct iri*);
235 881a9dd9 2021-01-16 op int send_vhost(int, struct vhost*);
236 881a9dd9 2021-01-16 op int recv_vhost(int, struct vhost**);
237 881a9dd9 2021-01-16 op int send_fd(int, int);
238 881a9dd9 2021-01-16 op int recv_fd(int);
239 4e2e2ab1 2021-02-03 op int executor_main(void);
241 dafb57b8 2021-01-15 op /* sandbox.c */
242 33ac26a0 2021-01-21 op void sandbox(void);
245 ef04b551 2021-01-09 op int valid_multibyte_utf8(struct parser*);
246 3300cbe0 2021-01-27 op char *utf8_nth(char*, size_t);
249 3c1cf9d0 2021-01-11 op int parse_iri(char*, struct iri*, const char**);
250 c4f682f8 2021-01-27 op int trim_req_iri(char*, const char **);
251 2fafa2d2 2021-02-01 op int serialize_iri(struct iri*, char*, size_t);
254 a2fd8013 2021-01-29 op int puny_decode(const char*, char*, size_t, const char**);
256 44ee1bac 2021-01-27 op /* utils.c */
257 ca21e100 2021-02-04 op void block_signals(void);
258 ca21e100 2021-02-04 op void unblock_signals(void);
259 44ee1bac 2021-01-27 op int starts_with(const char*, const char*);
260 44ee1bac 2021-01-27 op int ends_with(const char*, const char*);
261 44ee1bac 2021-01-27 op ssize_t filesize(int);
262 2fafa2d2 2021-02-01 op char *absolutify_path(const char*);
263 ca21e100 2021-02-04 op char *xstrdup(const char*);