1 | /* |
---|
2 | * Copyright (c) 2004-2005 Sergey Lyubka <valenok@gmail.com> |
---|
3 | * All rights reserved |
---|
4 | * |
---|
5 | * "THE BEER-WARE LICENSE" (Revision 42): |
---|
6 | * Sergey Lyubka wrote this file. As long as you retain this notice you |
---|
7 | * can do whatever you want with this stuff. If we meet some day, and you think |
---|
8 | * this stuff is worth it, you can buy me a beer in return. |
---|
9 | */ |
---|
10 | |
---|
11 | #ifndef DEFS_HEADER_DEFINED |
---|
12 | #define DEFS_HEADER_DEFINED |
---|
13 | |
---|
14 | #include "std_includes.h" |
---|
15 | #include "llist.h" |
---|
16 | #include "io.h" |
---|
17 | #include "shttpd.h" |
---|
18 | #include "md5.h" |
---|
19 | |
---|
20 | #define VERSION "1.37" /* Version */ |
---|
21 | |
---|
22 | #ifndef CONFIG |
---|
23 | #define CONFIG "shttpd.conf" /* Configuration file */ |
---|
24 | #endif /* CONFIG */ |
---|
25 | |
---|
26 | #define HTPASSWD ".htpasswd" /* Passwords file name */ |
---|
27 | #define DFLT_IO_SIZ "16384" /* Default max request size */ |
---|
28 | #define HTTP_PORT "80" /* Default listening port */ |
---|
29 | #define INDEX_FILES "index.html index.htm index.php index.cgi" |
---|
30 | #define CGI_EXT ".cgi .pl .php" /* Default CGI extensions */ |
---|
31 | #define REALM "mydomain.com" /* Default authentication realm */ |
---|
32 | #define DELIM_CHARS " ," /* Separators for lists */ |
---|
33 | |
---|
34 | #define EXPIRE_TIME 3600 /* Expiration time, seconds */ |
---|
35 | #define ENV_MAX 4096 /* Size of environment block */ |
---|
36 | #define CGI_ENV_VARS 64 /* Maximum vars passed to CGI */ |
---|
37 | #define URI_MAX 32768 /* Maximum URI size */ |
---|
38 | #define MIN_REQ_LEN 16 /* "GET / HTTP/1.1\n\n" */ |
---|
39 | |
---|
40 | #define NELEMS(ar) (sizeof(ar) / sizeof(ar[0])) |
---|
41 | |
---|
42 | #ifdef _DEBUG |
---|
43 | #define DBG(x) do { printf x ; putchar('\n'); fflush(stdout); } while (0) |
---|
44 | #else |
---|
45 | #define DBG(x) |
---|
46 | #endif /* DEBUG */ |
---|
47 | |
---|
48 | #ifdef EMBEDDED |
---|
49 | #include "shttpd.h" |
---|
50 | #endif /* EMBEDDED */ |
---|
51 | |
---|
52 | /* |
---|
53 | * Darwin prior to 7.0 and Win32 do not have socklen_t |
---|
54 | */ |
---|
55 | #ifdef NO_SOCKLEN_T |
---|
56 | typedef int socklen_t; |
---|
57 | #endif /* NO_SOCKLEN_T */ |
---|
58 | |
---|
59 | /* |
---|
60 | * For parsing. This guy represents a substring. |
---|
61 | */ |
---|
62 | struct vec { |
---|
63 | const char *ptr; |
---|
64 | int len; |
---|
65 | }; |
---|
66 | |
---|
67 | enum {METHOD_GET, METHOD_POST, METHOD_PUT, METHOD_DELETE, METHOD_HEAD}; |
---|
68 | enum {HDR_DATE, HDR_INT, HDR_STRING}; /* HTTP header types */ |
---|
69 | enum {E_FATAL = 1, E_LOG = 2}; /* Flags for elog() function */ |
---|
70 | typedef unsigned long big_int_t; /* Type for Content-Length */ |
---|
71 | |
---|
72 | /* |
---|
73 | * Unified socket address |
---|
74 | */ |
---|
75 | struct usa { |
---|
76 | socklen_t len; |
---|
77 | union { |
---|
78 | struct sockaddr sa; |
---|
79 | struct sockaddr_in sin; |
---|
80 | } u; |
---|
81 | }; |
---|
82 | |
---|
83 | /* |
---|
84 | * This thing is aimed to hold values of any type. |
---|
85 | * Used to store parsed headers' values. |
---|
86 | */ |
---|
87 | union variant { |
---|
88 | char *v_str; |
---|
89 | int v_int; |
---|
90 | big_int_t v_big_int; |
---|
91 | time_t v_time; |
---|
92 | void (*v_func)(void); |
---|
93 | void *v_void; |
---|
94 | struct vec v_vec; |
---|
95 | }; |
---|
96 | |
---|
97 | /* |
---|
98 | * This structure is used to hold mime types and associated file extensions. |
---|
99 | */ |
---|
100 | struct mime_type { |
---|
101 | const char *ext; |
---|
102 | int ext_len; |
---|
103 | const char *mime; |
---|
104 | }; |
---|
105 | |
---|
106 | struct mime_type_link { |
---|
107 | struct llhead link; |
---|
108 | char *ext; |
---|
109 | int ext_len; |
---|
110 | char *mime; |
---|
111 | }; |
---|
112 | |
---|
113 | /* |
---|
114 | * This is used only in embedded configuration. This structure holds a |
---|
115 | * registered URI, associated callback function with callback data. |
---|
116 | * For non-embedded compilation shttpd_callback_t is not defined, so |
---|
117 | * we use union variant to keep the compiler silent. |
---|
118 | */ |
---|
119 | struct registered_uri { |
---|
120 | struct llhead link; |
---|
121 | const char *uri; |
---|
122 | union variant callback; |
---|
123 | void *callback_data; |
---|
124 | }; |
---|
125 | |
---|
126 | /* |
---|
127 | * User may bind a passwords file to any URI. This makes that URI password |
---|
128 | * protected: anybody who accesses that URI will be asked to authorize. |
---|
129 | */ |
---|
130 | struct uri_auth { |
---|
131 | struct llhead link; |
---|
132 | const char *uri; |
---|
133 | const char *file_name; |
---|
134 | size_t uri_len; |
---|
135 | }; |
---|
136 | |
---|
137 | /* |
---|
138 | * User may want to handle certain errors. This structure holds the |
---|
139 | * handlers for corresponding error codes. |
---|
140 | */ |
---|
141 | struct error_handler { |
---|
142 | struct llhead link; |
---|
143 | int code; |
---|
144 | union variant callback; |
---|
145 | void *callback_data; |
---|
146 | }; |
---|
147 | |
---|
148 | struct http_header { |
---|
149 | int len; /* Header name length */ |
---|
150 | int type; /* Header type */ |
---|
151 | size_t offset; /* Value placeholder */ |
---|
152 | const char *name; /* Header name */ |
---|
153 | }; |
---|
154 | |
---|
155 | /* |
---|
156 | * This guy holds parsed HTTP headers |
---|
157 | */ |
---|
158 | struct headers { |
---|
159 | union variant cl; /* Content-Length: */ |
---|
160 | union variant ct; /* Content-Type: */ |
---|
161 | union variant connection; /* Connection: */ |
---|
162 | union variant ims; /* If-Modified-Since: */ |
---|
163 | union variant user; /* Remote user name */ |
---|
164 | union variant auth; /* Authorization */ |
---|
165 | union variant useragent; /* User-Agent: */ |
---|
166 | union variant referer; /* Referer: */ |
---|
167 | union variant cookie; /* Cookie: */ |
---|
168 | union variant location; /* Location: */ |
---|
169 | union variant range; /* Range: */ |
---|
170 | union variant status; /* Status: */ |
---|
171 | union variant transenc; /* Transfer-Encoding: */ |
---|
172 | }; |
---|
173 | |
---|
174 | /* Must go after union variant definition */ |
---|
175 | #include "ssl.h" |
---|
176 | |
---|
177 | /* |
---|
178 | * The communication channel |
---|
179 | */ |
---|
180 | union channel { |
---|
181 | int fd; /* Regular static file */ |
---|
182 | int sock; /* Connected socket */ |
---|
183 | struct { |
---|
184 | int sock; /* XXX important. must be first */ |
---|
185 | SSL *ssl; /* shttpd_poll() assumes that */ |
---|
186 | } ssl; /* SSL-ed socket */ |
---|
187 | struct { |
---|
188 | DIR *dirp; |
---|
189 | char *path; |
---|
190 | } dir; /* Opened directory */ |
---|
191 | struct { |
---|
192 | void *state; /* For keeping state */ |
---|
193 | union variant func; /* User callback function */ |
---|
194 | void *data; /* User defined parameters */ |
---|
195 | } emb; /* Embedded, user callback */ |
---|
196 | }; |
---|
197 | |
---|
198 | struct stream; |
---|
199 | |
---|
200 | /* |
---|
201 | * IO class descriptor (file, directory, socket, SSL, CGI, etc) |
---|
202 | * These classes are defined in io_*.c files. |
---|
203 | */ |
---|
204 | struct io_class { |
---|
205 | const char *name; |
---|
206 | int (*read)(struct stream *, void *buf, size_t len); |
---|
207 | int (*write)(struct stream *, const void *buf, size_t len); |
---|
208 | void (*close)(struct stream *); |
---|
209 | }; |
---|
210 | |
---|
211 | /* |
---|
212 | * Data exchange stream. It is backed by some communication channel: |
---|
213 | * opened file, socket, etc. The 'read' and 'write' methods are |
---|
214 | * determined by a communication channel. |
---|
215 | */ |
---|
216 | struct stream { |
---|
217 | struct conn *conn; |
---|
218 | union channel chan; /* Descriptor */ |
---|
219 | struct io io; /* IO buffer */ |
---|
220 | const struct io_class *io_class; /* IO class */ |
---|
221 | int nread_last; /* Bytes last read */ |
---|
222 | int headers_len; |
---|
223 | big_int_t content_len; |
---|
224 | unsigned int flags; |
---|
225 | #define FLAG_HEADERS_PARSED 1 |
---|
226 | #define FLAG_SSL_ACCEPTED 2 |
---|
227 | #define FLAG_R 4 /* Can read in general */ |
---|
228 | #define FLAG_W 8 /* Can write in general */ |
---|
229 | #define FLAG_CLOSED 16 |
---|
230 | #define FLAG_DONT_CLOSE 32 |
---|
231 | #define FLAG_ALWAYS_READY 64 /* File, dir, user_func */ |
---|
232 | }; |
---|
233 | |
---|
234 | struct conn { |
---|
235 | struct llhead link; /* Connections chain */ |
---|
236 | struct shttpd_ctx *ctx; /* Context this conn belongs to */ |
---|
237 | struct usa sa; /* Remote socket address */ |
---|
238 | time_t birth_time; /* Creation time */ |
---|
239 | time_t expire_time; /* Expiration time */ |
---|
240 | |
---|
241 | int status; /* Reply status code */ |
---|
242 | int method; /* Request method */ |
---|
243 | char *uri; /* Decoded URI */ |
---|
244 | unsigned long major_version; /* Major HTTP version number */ |
---|
245 | unsigned long minor_version; /* Minor HTTP version number */ |
---|
246 | char *request; /* Request line */ |
---|
247 | char *headers; /* Request headers */ |
---|
248 | char *query; /* QUERY_STRING part of the URI */ |
---|
249 | char *path_info; /* PATH_INFO thing */ |
---|
250 | const char *mime_type; /* Mime type */ |
---|
251 | |
---|
252 | struct headers ch; /* Parsed client headers */ |
---|
253 | |
---|
254 | struct stream loc; /* Local stream */ |
---|
255 | struct stream rem; /* Remote stream */ |
---|
256 | }; |
---|
257 | |
---|
258 | |
---|
259 | /* |
---|
260 | * SHTTPD context |
---|
261 | */ |
---|
262 | struct shttpd_ctx { |
---|
263 | time_t start_time; /* Start time */ |
---|
264 | int nactive; /* # of connections now */ |
---|
265 | unsigned long nrequests; /* Requests made */ |
---|
266 | uint64_t in, out; /* IN/OUT traffic counters */ |
---|
267 | #if !defined(NO_SSL) |
---|
268 | SSL_CTX *ssl_ctx; /* SSL context */ |
---|
269 | #endif /* NO_SSL */ |
---|
270 | struct llhead connections; /* List of connections */ |
---|
271 | |
---|
272 | struct llhead mime_types; /* Known mime types */ |
---|
273 | struct llhead registered_uris;/* User urls */ |
---|
274 | struct llhead uri_auths; /* User auth files */ |
---|
275 | struct llhead error_handlers; /* Embedded error handlers */ |
---|
276 | |
---|
277 | FILE *access_log; /* Access log stream */ |
---|
278 | FILE *error_log; /* Error log stream */ |
---|
279 | char *put_auth_file; /* PUT auth file */ |
---|
280 | char *document_root; /* Document root */ |
---|
281 | char *index_files; /* Index files */ |
---|
282 | char *aliases; /* Aliases */ |
---|
283 | char *mime_file; /* Mime types file */ |
---|
284 | #if !defined(NO_CGI) |
---|
285 | char *cgi_vars; /* CGI environment variables */ |
---|
286 | char *cgi_extensions; /* CGI extensions */ |
---|
287 | char *cgi_interpreter; /* CGI script interpreter */ |
---|
288 | #endif /* NO_CGI */ |
---|
289 | char *auth_realm; /* Auth realm */ |
---|
290 | char *global_passwd_file; /* Global passwords file */ |
---|
291 | char *uid; /* Run as user */ |
---|
292 | int port; /* Listening port */ |
---|
293 | int dirlist; /* Directory listing */ |
---|
294 | int gui; /* Show GUI flag */ |
---|
295 | int auto_start; /* Start on OS boot */ |
---|
296 | int io_buf_size; /* IO buffer size */ |
---|
297 | int inetd_mode; /* Inetd flag */ |
---|
298 | #if defined(_WIN32) |
---|
299 | CRITICAL_SECTION mutex; /* For MT case */ |
---|
300 | HANDLE ev[2]; /* For thread synchronization */ |
---|
301 | #elif defined(__rtems__) |
---|
302 | rtems_id mutex; |
---|
303 | #endif /* _WIN32 */ |
---|
304 | }; |
---|
305 | |
---|
306 | struct listener { |
---|
307 | struct llhead link; |
---|
308 | struct shttpd_ctx *ctx; /* Context that socket belongs */ |
---|
309 | int sock; /* Listening socket */ |
---|
310 | }; |
---|
311 | |
---|
312 | /* Option setter function */ |
---|
313 | typedef void (*optset_t)(struct shttpd_ctx *, void *ptr, const char *string); |
---|
314 | struct opt { |
---|
315 | int sw; /* Command line switch */ |
---|
316 | const char *name; /* Option name in config file */ |
---|
317 | const char *desc; /* Description */ |
---|
318 | optset_t setter; /* Option setter function */ |
---|
319 | size_t ofs; /* Value offset in context */ |
---|
320 | const char *arg; /* Argument format */ |
---|
321 | const char *def; /* Default option value */ |
---|
322 | unsigned int flags; /* Flags */ |
---|
323 | #define OPT_BOOL 1 |
---|
324 | #define OPT_INT 2 |
---|
325 | #define OPT_FILE 4 |
---|
326 | #define OPT_DIR 8 |
---|
327 | #define OPT_ADVANCED 16 |
---|
328 | }; |
---|
329 | |
---|
330 | extern const struct opt options[]; |
---|
331 | |
---|
332 | /* |
---|
333 | * In SHTTPD, list of values are represented as comma or space separated |
---|
334 | * string. For example, list of CGI extensions can be represented as |
---|
335 | * ".cgi,.php,.pl", or ".cgi .php .pl". The macro that follows allows to |
---|
336 | * loop through the individual values in that list. |
---|
337 | * A "const char *" pointer and size_t variable must be passed to the macro. |
---|
338 | * Spaces or commas can be used as delimiters (macro DELIM_CHARS) |
---|
339 | */ |
---|
340 | #define FOR_EACH_WORD_IN_LIST(s,len) \ |
---|
341 | for (; s != NULL && (len = strcspn(s, DELIM_CHARS)) != 0; s += len + 1) |
---|
342 | |
---|
343 | /* |
---|
344 | * shttpd.c |
---|
345 | */ |
---|
346 | extern time_t current_time; /* Current UTC time */ |
---|
347 | extern int tz_offset; /* Offset from GMT time zone */ |
---|
348 | extern const struct vec known_http_methods[]; |
---|
349 | |
---|
350 | extern void stop_stream(struct stream *stream); |
---|
351 | extern void decode_url_encoded_string(const char *, int, char *dst, int); |
---|
352 | extern void send_server_error(struct conn *, int code, const char *reason); |
---|
353 | extern int get_headers_len(const char *buf, size_t buflen); |
---|
354 | extern void parse_headers(const char *s, int len, struct headers *parsed); |
---|
355 | |
---|
356 | /* |
---|
357 | * mime_type.c |
---|
358 | */ |
---|
359 | extern const char *get_mime_type(struct shttpd_ctx *, const char *uri, int len); |
---|
360 | extern void set_mime_types(struct shttpd_ctx *ctx, const char *path); |
---|
361 | |
---|
362 | /* |
---|
363 | * config.c |
---|
364 | */ |
---|
365 | extern void usage(const char *prog); |
---|
366 | extern struct shttpd_ctx *init_from_argc_argv(const char *, int, char *[]); |
---|
367 | |
---|
368 | /* |
---|
369 | * log.c |
---|
370 | */ |
---|
371 | extern void elog(int flags, struct conn *c, const char *fmt, ...); |
---|
372 | extern void log_access(FILE *fp, const struct conn *c); |
---|
373 | |
---|
374 | /* |
---|
375 | * string.c |
---|
376 | */ |
---|
377 | extern void my_strlcpy(register char *, register const char *, size_t); |
---|
378 | extern int my_strncasecmp(register const char *, |
---|
379 | register const char *, size_t); |
---|
380 | #ifndef HAVE_STRNDUP |
---|
381 | extern char *my_strndup(const char *ptr, size_t len); |
---|
382 | #else |
---|
383 | #include <string.h> |
---|
384 | #define my_strndup(x,l) strndup((x),(l)) |
---|
385 | #endif |
---|
386 | |
---|
387 | #ifndef HAVE_STRDUP |
---|
388 | extern char *my_strdup(const char *str); |
---|
389 | #else |
---|
390 | #include <string.h> |
---|
391 | #define my_strdup(x) strdup(x) |
---|
392 | #endif |
---|
393 | extern int my_snprintf(char *buf, size_t buflen, const char *fmt, ...); |
---|
394 | |
---|
395 | /* |
---|
396 | * compat_*.c |
---|
397 | */ |
---|
398 | extern void set_close_on_exec(int fd); |
---|
399 | extern int set_non_blocking_mode(int fd); |
---|
400 | extern int my_stat(const char *, struct stat *stp); |
---|
401 | extern int my_open(const char *, int flags, int mode); |
---|
402 | extern int my_remove(const char *); |
---|
403 | extern int my_rename(const char *, const char *); |
---|
404 | extern int my_mkdir(const char *, int); |
---|
405 | extern char * my_getcwd(char *, int); |
---|
406 | extern int spawn_process(struct conn *c, const char *prog, |
---|
407 | char *envblk, char *envp[], int sock, const char *dir); |
---|
408 | |
---|
409 | /* |
---|
410 | * io_*.c |
---|
411 | */ |
---|
412 | extern const struct io_class io_file; |
---|
413 | extern const struct io_class io_socket; |
---|
414 | extern const struct io_class io_ssl; |
---|
415 | extern const struct io_class io_cgi; |
---|
416 | extern const struct io_class io_dir; |
---|
417 | extern const struct io_class io_embedded; |
---|
418 | |
---|
419 | extern int put_dir(const char *path); |
---|
420 | extern void get_dir(struct conn *c); |
---|
421 | extern void get_file(struct conn *c, struct stat *stp); |
---|
422 | extern void ssl_handshake(struct stream *stream); |
---|
423 | extern void setup_embedded_stream(struct conn *, union variant, void *); |
---|
424 | extern struct registered_uri *is_registered_uri(struct shttpd_ctx *, |
---|
425 | const char *uri); |
---|
426 | |
---|
427 | /* |
---|
428 | * auth.c |
---|
429 | */ |
---|
430 | extern int check_authorization(struct conn *c, const char *path); |
---|
431 | extern int is_authorized_for_put(struct conn *c); |
---|
432 | extern void send_authorization_request(struct conn *c); |
---|
433 | extern int edit_passwords(const char *fname, const char *domain, |
---|
434 | const char *user, const char *pass); |
---|
435 | |
---|
436 | /* |
---|
437 | * cgi.c |
---|
438 | */ |
---|
439 | extern int is_cgi(struct shttpd_ctx *ctx, const char *path); |
---|
440 | extern int run_cgi(struct conn *c, const char *prog); |
---|
441 | extern void do_cgi(struct conn *c); |
---|
442 | |
---|
443 | #define CGI_REPLY "HTTP/1.1 OK\r\n" |
---|
444 | #define CGI_REPLY_LEN (sizeof(CGI_REPLY) - 1) |
---|
445 | |
---|
446 | #endif /* DEFS_HEADER_DEFINED */ |
---|