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 52418c8d 2021-02-12 op #include "config.h"
22 252908e6 2021-01-24 op #include <sys/socket.h>
23 252908e6 2021-01-24 op #include <sys/types.h>
25 488f059a 2020-12-24 op #include <arpa/inet.h>
26 488f059a 2020-12-24 op #include <netinet/in.h>
28 252908e6 2021-01-24 op #include <dirent.h>
29 bc99d868 2021-03-19 op #include <limits.h>
30 bc99d868 2021-03-19 op #include <netdb.h>
31 ca21e100 2021-02-04 op #include <signal.h>
32 488f059a 2020-12-24 op #include <stdio.h>
33 488f059a 2020-12-24 op #include <stdlib.h>
34 b63e30ff 2021-02-07 op #include <time.h>
35 488f059a 2020-12-24 op #include <tls.h>
36 488f059a 2020-12-24 op #include <unistd.h>
38 02be96c6 2021-02-09 op #include <openssl/x509.h>
40 efb6210d 2021-10-02 op #if HAVE_EVENT2
41 efb6210d 2021-10-02 op # include <event2/event.h>
42 efb6210d 2021-10-02 op # include <event2/event_compat.h>
43 efb6210d 2021-10-02 op # include <event2/event_struct.h>
44 efb6210d 2021-10-02 op # include <event2/buffer.h>
45 efb6210d 2021-10-02 op # include <event2/buffer_compat.h>
46 efb6210d 2021-10-02 op # include <event2/bufferevent.h>
47 efb6210d 2021-10-02 op # include <event2/bufferevent_struct.h>
48 efb6210d 2021-10-02 op # include <event2/bufferevent_compat.h>
50 efb6210d 2021-10-02 op # include <event.h>
53 f361f799 2021-07-10 op #define GMID_STRING "gmid " VERSION
54 f361f799 2021-07-10 op #define GMID_VERSION "gmid/" VERSION
56 488f059a 2020-12-24 op #define GEMINI_URL_LEN (1024+3) /* URL max len + \r\n + \0 */
58 488f059a 2020-12-24 op #define SUCCESS 20
59 0be51733 2021-01-20 op #define TEMP_REDIRECT 30
60 488f059a 2020-12-24 op #define TEMP_FAILURE 40
61 35744950 2021-02-01 op #define CGI_ERROR 42
62 72b033ef 2021-12-29 op #define PROXY_ERROR 43
63 488f059a 2020-12-24 op #define NOT_FOUND 51
64 7b1d9790 2021-01-11 op #define PROXY_REFUSED 53
65 488f059a 2020-12-24 op #define BAD_REQUEST 59
66 02be96c6 2021-02-09 op #define CLIENT_CERT_REQ 60
67 02be96c6 2021-02-09 op #define CERT_NOT_AUTH 61
69 35cf19e3 2021-01-28 op /* maximum hostname and label length, +1 for the NUL-terminator */
70 35cf19e3 2021-01-28 op #define DOMAIN_NAME_LEN (253+1)
71 35cf19e3 2021-01-28 op #define LABEL_LEN (63+1)
73 8ad1c570 2021-05-09 op #define FCGI_MAX 32
74 2c3e53da 2021-03-03 op #define PROC_MAX 16
80 054387bb 2021-12-29 op uint16_t port_no;
83 054387bb 2021-12-29 op char *fragment;
86 054387bb 2021-12-29 op struct parser {
88 054387bb 2021-12-29 op struct iri *parsed;
89 054387bb 2021-12-29 op const char *err;
98 8ad1c570 2021-05-09 op extern struct fcgi fcgi[FCGI_MAX];
100 b8e64ccd 2021-03-31 op TAILQ_HEAD(lochead, location);
101 c8b74339 2021-01-24 op struct location {
102 fe5967cd 2021-01-27 op const char *match;
103 fe5967cd 2021-01-27 op const char *lang;
104 fe5967cd 2021-01-27 op const char *default_mime;
105 fe5967cd 2021-01-27 op const char *index;
106 252908e6 2021-01-24 op int auto_index; /* 0 auto, -1 off, 1 on */
107 6abda252 2021-02-06 op int block_code;
108 6abda252 2021-02-06 op const char *block_fmt;
110 02be96c6 2021-02-09 op X509_STORE *reqca;
111 793835cb 2021-02-23 op int disable_log;
114 72b033ef 2021-12-29 op char *proxy_host;
115 72b033ef 2021-12-29 op const char *proxy_port;
116 d49093c1 2021-01-01 op uint8_t *proxy_cert;
117 d49093c1 2021-01-01 op size_t proxy_cert_len;
118 d49093c1 2021-01-01 op uint8_t *proxy_key;
119 d49093c1 2021-01-01 op size_t proxy_key_len;
121 fdea6aa0 2021-04-30 op const char *dir;
124 b8e64ccd 2021-03-31 op TAILQ_ENTRY(location) locations;
127 9cc630aa 2021-04-28 op TAILQ_HEAD(envhead, envlist);
128 9cc630aa 2021-04-28 op struct envlist {
131 9cc630aa 2021-04-28 op TAILQ_ENTRY(envlist) envs;
134 cc8c2901 2021-04-29 op TAILQ_HEAD(aliashead, alist);
135 cc8c2901 2021-04-29 op struct alist {
137 cc8c2901 2021-04-29 op TAILQ_ENTRY(alist) aliases;
140 b8e64ccd 2021-03-31 op extern TAILQ_HEAD(vhosthead, vhost) hosts;
141 15902770 2021-01-15 op struct vhost {
142 15902770 2021-01-15 op const char *domain;
143 15902770 2021-01-15 op const char *cert;
144 15902770 2021-01-15 op const char *key;
145 ff05125e 2021-10-15 op const char *ocsp;
146 15902770 2021-01-15 op const char *cgi;
147 e3ddf390 2021-02-06 op const char *entrypoint;
149 b8e64ccd 2021-03-31 op TAILQ_ENTRY(vhost) vhosts;
152 a8a1f439 2021-07-07 op * the first location rule is always '*' and holds the default
153 b8e64ccd 2021-03-31 op * settings for the vhost, then follows the "real" location
154 a8a1f439 2021-07-07 op * rules as specified in the configuration.
156 b8e64ccd 2021-03-31 op struct lochead locations;
158 9cc630aa 2021-04-28 op struct envhead env;
159 f740b61b 2021-06-11 op struct envhead params;
160 cc8c2901 2021-04-29 op struct aliashead aliases;
163 a010b0dd 2021-01-18 op struct etm { /* extension to mime */
164 a010b0dd 2021-01-18 op const char *mime;
165 a010b0dd 2021-01-18 op const char *ext;
168 b2a6b613 2021-01-21 op struct mime {
169 a010b0dd 2021-01-18 op struct etm *t;
174 15902770 2021-01-15 op struct conf {
175 3abf91b0 2021-02-07 op /* from command line */
176 3abf91b0 2021-02-07 op int foreground;
179 3abf91b0 2021-02-07 op /* in the config */
182 ae08ec7d 2021-01-25 op uint32_t protos;
183 ae08ec7d 2021-01-25 op struct mime mime;
184 ae08ec7d 2021-01-25 op char *chroot;
189 d090dc84 2021-02-08 op extern const char *config_path;
190 15902770 2021-01-15 op extern struct conf conf;
192 bc99d868 2021-03-19 op extern struct imsgbuf logibuf, exibuf, servibuf[PROC_MAX];
194 2c3e53da 2021-03-03 op extern int servpipes[PROC_MAX];
196 bc99d868 2021-03-19 op typedef void (imsg_handlerfn)(struct imsgbuf*, struct imsg*, size_t);
199 efe7d180 2021-10-02 op REQUEST_UNDECIDED,
200 efe7d180 2021-10-02 op REQUEST_FILE,
203 efe7d180 2021-10-02 op REQUEST_FCGI,
204 72b033ef 2021-12-29 op REQUEST_PROXY,
205 efe7d180 2021-10-02 op REQUEST_DONE,
208 72b033ef 2021-12-29 op #define IS_INTERNAL_REQUEST(x) \
209 72b033ef 2021-12-29 op ((x) != REQUEST_CGI && \
210 72b033ef 2021-12-29 op (x) != REQUEST_FCGI && \
211 72b033ef 2021-12-29 op (x) != REQUEST_PROXY)
213 488f059a 2020-12-24 op struct client {
215 488f059a 2020-12-24 op struct tls *ctx;
217 0be51733 2021-01-20 op struct iri iri;
218 3300cbe0 2021-01-27 op char domain[DOMAIN_NAME_LEN];
220 efe7d180 2021-10-02 op struct bufferevent *bev;
224 efe7d180 2021-10-02 op struct bufferevent *cgibev;
226 72b033ef 2021-12-29 op struct bufferevent *proxybev;
227 72b033ef 2021-12-29 op struct tls *proxyctx;
228 72b033ef 2021-12-29 op struct event proxyev;
230 efe7d180 2021-10-02 op char *header;
233 488f059a 2020-12-24 op const char *meta;
235 11c98667 2021-04-25 op struct dirent **dir;
236 11c98667 2021-04-25 op int dirlen, diroff;
238 c836cdfa 2021-03-29 op /* big enough to store STATUS + SPACE + META + CRLF */
239 c836cdfa 2021-03-29 op char sbuf[1029];
240 27b2fa9a 2021-02-12 op ssize_t len, off;
242 709d6e5e 2021-01-10 op struct sockaddr_storage addr;
243 bc99d868 2021-03-19 op struct vhost *host; /* host they're talking to */
244 1feaf2a6 2021-05-15 op size_t loc; /* location matched */
245 d49093c1 2021-01-01 op struct location *l;
247 207b3e80 2021-10-07 op SPLAY_ENTRY(client) entry;
249 207b3e80 2021-10-07 op SPLAY_HEAD(client_tree_id, client);
250 207b3e80 2021-10-07 op extern struct client_tree_id clients;
252 bc99d868 2021-03-19 op struct cgireq {
253 bc99d868 2021-03-19 op char buf[GEMINI_URL_LEN];
255 bc99d868 2021-03-19 op size_t iri_schema_off;
256 bc99d868 2021-03-19 op size_t iri_host_off;
257 bc99d868 2021-03-19 op size_t iri_port_off;
258 bc99d868 2021-03-19 op size_t iri_path_off;
259 bc99d868 2021-03-19 op size_t iri_query_off;
260 bc99d868 2021-03-19 op size_t iri_fragment_off;
261 bc99d868 2021-03-19 op int iri_portno;
263 bc99d868 2021-03-19 op char spath[PATH_MAX+1];
264 bc99d868 2021-03-19 op char relpath[PATH_MAX+1];
265 bc99d868 2021-03-19 op char addr[NI_MAXHOST+1];
267 bc99d868 2021-03-19 op /* AFAIK there isn't an upper limit for these two fields. */
268 bc99d868 2021-03-19 op char subject[64+1];
269 bc99d868 2021-03-19 op char issuer[64+1];
271 bc99d868 2021-03-19 op char hash[128+1];
272 89541eee 2021-04-13 op char version[8];
273 89541eee 2021-04-13 op char cipher[32];
274 89541eee 2021-04-13 op int cipher_strength;
275 bc99d868 2021-03-19 op time_t notbefore;
276 bc99d868 2021-03-19 op time_t notafter;
278 bc99d868 2021-03-19 op size_t host_off;
279 fdea6aa0 2021-04-30 op size_t loc_off;
282 72b033ef 2021-12-29 op struct connreq {
283 72b033ef 2021-12-29 op char host[NI_MAXHOST];
284 72b033ef 2021-12-29 op char port[NI_MAXSERV];
290 488f059a 2020-12-24 op FILE_EXECUTABLE,
291 488f059a 2020-12-24 op FILE_DIRECTORY,
292 488f059a 2020-12-24 op FILE_MISSING,
295 bc99d868 2021-03-19 op enum imsg_type {
296 bc99d868 2021-03-19 op IMSG_CGI_REQ,
297 bc99d868 2021-03-19 op IMSG_CGI_RES,
298 8ad1c570 2021-05-09 op IMSG_FCGI_REQ,
299 8ad1c570 2021-05-09 op IMSG_FCGI_FD,
300 72b033ef 2021-12-29 op IMSG_CONN_REQ,
301 72b033ef 2021-12-29 op IMSG_CONN_FD,
303 41395640 2021-07-19 op IMSG_LOG_REQUEST,
304 e952c505 2021-06-15 op IMSG_LOG_TYPE,
309 8443bff7 2021-01-25 op char *data_dir(void);
310 8443bff7 2021-01-25 op void load_local_cert(const char*, const char*);
311 ae08ec7d 2021-01-25 op void load_vhosts(void);
312 33ac26a0 2021-01-21 op int make_socket(int, int);
313 ae08ec7d 2021-01-25 op void setup_tls(void);
314 c8b74339 2021-01-24 op void init_config(void);
315 ca21e100 2021-02-04 op void free_config(void);
316 ae08ec7d 2021-01-25 op void drop_priv(void);
318 6abda252 2021-02-06 op void yyerror(const char*, ...);
319 13ed2fb6 2021-01-27 op void parse_conf(const char*);
320 f0a01fc7 2021-10-09 op void print_conf(void);
321 3b21cca3 2021-06-29 op int cmdline_symset(char *);
324 3abf91b0 2021-02-07 op void fatal(const char*, ...)
325 3abf91b0 2021-02-07 op __attribute__((format (printf, 1, 2)))
326 3abf91b0 2021-02-07 op __attribute__((__noreturn__));
328 3abf91b0 2021-02-07 op #define LOG_ATTR_FMT __attribute__((format (printf, 2, 3)))
329 3abf91b0 2021-02-07 op void log_err(struct client*, const char*, ...) LOG_ATTR_FMT;
330 3abf91b0 2021-02-07 op void log_warn(struct client*, const char*, ...) LOG_ATTR_FMT;
331 3abf91b0 2021-02-07 op void log_notice(struct client*, const char*, ...) LOG_ATTR_FMT;
332 3abf91b0 2021-02-07 op void log_info(struct client*, const char*, ...) LOG_ATTR_FMT;
333 3abf91b0 2021-02-07 op void log_debug(struct client*, const char*, ...) LOG_ATTR_FMT;
334 3abf91b0 2021-02-07 op void log_request(struct client*, char*, size_t);
335 376a5407 2021-02-23 op int logger_main(int, struct imsgbuf*);
338 b2a6b613 2021-01-21 op void init_mime(struct mime*);
339 b2a6b613 2021-01-21 op void add_mime(struct mime*, const char*, const char*);
340 b2a6b613 2021-01-21 op void load_default_mime(struct mime*);
341 6119e13e 2021-01-19 op const char *mime(struct vhost*, const char*);
343 d3a08f4d 2021-01-17 op /* server.c */
344 090b8a89 2021-07-06 op extern int shutting_down;
345 c8b74339 2021-01-24 op const char *vhost_lang(struct vhost*, const char*);
346 c8b74339 2021-01-24 op const char *vhost_default_mime(struct vhost*, const char*);
347 c8b74339 2021-01-24 op const char *vhost_index(struct vhost*, const char*);
348 252908e6 2021-01-24 op int vhost_auto_index(struct vhost*, const char*);
349 6abda252 2021-02-06 op int vhost_block_return(struct vhost*, const char*, int*, const char**);
350 72b033ef 2021-12-29 op struct location *vhost_reverse_proxy(struct vhost *, const char *);
351 8ad1c570 2021-05-09 op int vhost_fastcgi(struct vhost*, const char*);
352 1feaf2a6 2021-05-15 op int vhost_dirfd(struct vhost*, const char*, size_t*);
353 6abda252 2021-02-06 op int vhost_strip(struct vhost*, const char*);
354 02be96c6 2021-02-09 op X509_STORE *vhost_require_ca(struct vhost*, const char*);
355 793835cb 2021-02-23 op int vhost_disable_log(struct vhost*, const char*);
357 9b8f5ed2 2021-02-03 op void mark_nonblock(int);
358 efe7d180 2021-10-02 op void client_write(struct bufferevent *, void *);
359 8ad1c570 2021-05-09 op void start_reply(struct client*, int, const char*);
360 efe7d180 2021-10-02 op void client_close(struct client *);
361 8ad1c570 2021-05-09 op struct client *try_client_by_id(int);
362 bc99d868 2021-03-19 op void loop(struct tls*, int, int, struct imsgbuf*);
364 207b3e80 2021-10-07 op int client_tree_cmp(struct client *, struct client *);
365 207b3e80 2021-10-07 op SPLAY_PROTOTYPE(client_tree_id, client, entry, client_tree_cmp);
368 11c98667 2021-04-25 op int scandir_fd(int, struct dirent***, int(*)(const struct dirent*),
369 11c98667 2021-04-25 op int(*)(const struct dirent**, const struct dirent**));
370 11c98667 2021-04-25 op int select_non_dot(const struct dirent*);
371 11c98667 2021-04-25 op int select_non_dotdot(const struct dirent*);
374 881a9dd9 2021-01-16 op int send_string(int, const char*);
375 881a9dd9 2021-01-16 op int recv_string(int, char**);
376 2fafa2d2 2021-02-01 op int send_iri(int, struct iri*);
377 2fafa2d2 2021-02-01 op int recv_iri(int, struct iri*);
378 2fafa2d2 2021-02-01 op void free_recvd_iri(struct iri*);
379 881a9dd9 2021-01-16 op int send_vhost(int, struct vhost*);
380 881a9dd9 2021-01-16 op int recv_vhost(int, struct vhost**);
381 b63e30ff 2021-02-07 op int send_time(int, time_t);
382 b63e30ff 2021-02-07 op int recv_time(int, time_t*);
383 881a9dd9 2021-01-16 op int send_fd(int, int);
384 881a9dd9 2021-01-16 op int recv_fd(int);
385 bc99d868 2021-03-19 op int executor_main(struct imsgbuf*);
388 741b69be 2021-09-26 op void fcgi_read(struct bufferevent *, void *);
389 741b69be 2021-09-26 op void fcgi_write(struct bufferevent *, void *);
390 741b69be 2021-09-26 op void fcgi_error(struct bufferevent *, short, void *);
391 4cd25209 2021-10-07 op void fcgi_req(struct client *);
393 dafb57b8 2021-01-15 op /* sandbox.c */
394 62e001b0 2021-03-20 op void sandbox_server_process(void);
395 62e001b0 2021-03-20 op void sandbox_executor_process(void);
396 62e001b0 2021-03-20 op void sandbox_logger_process(void);
399 ef04b551 2021-01-09 op int valid_multibyte_utf8(struct parser*);
400 3300cbe0 2021-01-27 op char *utf8_nth(char*, size_t);
403 3c1cf9d0 2021-01-11 op int parse_iri(char*, struct iri*, const char**);
404 2fafa2d2 2021-02-01 op int serialize_iri(struct iri*, char*, size_t);
405 9f006a21 2021-02-07 op char *pct_decode_str(char *);
407 72b033ef 2021-12-29 op /* proxy.c */
408 72b033ef 2021-12-29 op int proxy_init(struct client *);
411 a2fd8013 2021-01-29 op int puny_decode(const char*, char*, size_t, const char**);
413 44ee1bac 2021-01-27 op /* utils.c */
414 ca21e100 2021-02-04 op void block_signals(void);
415 ca21e100 2021-02-04 op void unblock_signals(void);
416 44ee1bac 2021-01-27 op int starts_with(const char*, const char*);
417 44ee1bac 2021-01-27 op int ends_with(const char*, const char*);
418 44ee1bac 2021-01-27 op ssize_t filesize(int);
419 2fafa2d2 2021-02-01 op char *absolutify_path(const char*);
420 ca21e100 2021-02-04 op char *xstrdup(const char*);
421 b8e64ccd 2021-03-31 op void *xcalloc(size_t, size_t);
422 3abf91b0 2021-02-07 op void gen_certificate(const char*, const char*, const char*);
423 02be96c6 2021-02-09 op X509_STORE *load_ca(const char*);
424 02be96c6 2021-02-09 op int validate_against_ca(X509_STORE*, const uint8_t*, size_t);
425 bc99d868 2021-03-19 op void dispatch_imsg(struct imsgbuf*, imsg_handlerfn**, size_t);
