File: | src/usr.sbin/relayd/relay_http.c |
Warning: | line 1814, column 22 Access to field 'kv_flags' results in a dereference of a null pointer (loaded from variable 'match') |
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1 | /* $OpenBSD: relay_http.c,v 1.87 2023/12/01 16:48:40 millert Exp $ */ | |||
2 | ||||
3 | /* | |||
4 | * Copyright (c) 2006 - 2016 Reyk Floeter <reyk@openbsd.org> | |||
5 | * | |||
6 | * Permission to use, copy, modify, and distribute this software for any | |||
7 | * purpose with or without fee is hereby granted, provided that the above | |||
8 | * copyright notice and this permission notice appear in all copies. | |||
9 | * | |||
10 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |||
11 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |||
12 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |||
13 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |||
14 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |||
15 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |||
16 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |||
17 | */ | |||
18 | ||||
19 | #include <sys/types.h> | |||
20 | #include <sys/queue.h> | |||
21 | #include <sys/time.h> | |||
22 | #include <sys/socket.h> | |||
23 | #include <sys/tree.h> | |||
24 | ||||
25 | #include <netinet/in.h> | |||
26 | #include <arpa/inet.h> | |||
27 | ||||
28 | #include <limits.h> | |||
29 | #include <stdio.h> | |||
30 | #include <stdlib.h> | |||
31 | #include <errno(*__errno()).h> | |||
32 | #include <string.h> | |||
33 | #include <time.h> | |||
34 | #include <event.h> | |||
35 | #include <fnmatch.h> | |||
36 | #include <siphash.h> | |||
37 | #include <imsg.h> | |||
38 | #include <unistd.h> | |||
39 | ||||
40 | #include "relayd.h" | |||
41 | #include "http.h" | |||
42 | ||||
43 | static int _relay_lookup_url(struct ctl_relay_event *, char *, char *, | |||
44 | char *, struct kv *); | |||
45 | int relay_lookup_url(struct ctl_relay_event *, | |||
46 | const char *, struct kv *); | |||
47 | int relay_lookup_query(struct ctl_relay_event *, struct kv *); | |||
48 | int relay_lookup_cookie(struct ctl_relay_event *, const char *, | |||
49 | struct kv *); | |||
50 | void relay_read_httpcontent(struct bufferevent *, void *); | |||
51 | void relay_read_httpchunks(struct bufferevent *, void *); | |||
52 | char *relay_expand_http(struct ctl_relay_event *, char *, | |||
53 | char *, size_t); | |||
54 | int relay_writeheader_kv(struct ctl_relay_event *, struct kv *); | |||
55 | int relay_writeheader_http(struct ctl_relay_event *, | |||
56 | struct ctl_relay_event *); | |||
57 | int relay_writerequest_http(struct ctl_relay_event *, | |||
58 | struct ctl_relay_event *); | |||
59 | int relay_writeresponse_http(struct ctl_relay_event *, | |||
60 | struct ctl_relay_event *); | |||
61 | void relay_reset_http(struct ctl_relay_event *); | |||
62 | static int relay_httpmethod_cmp(const void *, const void *); | |||
63 | static int relay_httperror_cmp(const void *, const void *); | |||
64 | int relay_httpquery_test(struct ctl_relay_event *, | |||
65 | struct relay_rule *, struct kvlist *); | |||
66 | int relay_httpheader_test(struct ctl_relay_event *, | |||
67 | struct relay_rule *, struct kvlist *); | |||
68 | int relay_httppath_test(struct ctl_relay_event *, | |||
69 | struct relay_rule *, struct kvlist *); | |||
70 | int relay_httpurl_test(struct ctl_relay_event *, | |||
71 | struct relay_rule *, struct kvlist *); | |||
72 | int relay_httpcookie_test(struct ctl_relay_event *, | |||
73 | struct relay_rule *, struct kvlist *); | |||
74 | int relay_apply_actions(struct ctl_relay_event *, struct kvlist *, | |||
75 | struct relay_table *); | |||
76 | int relay_match_actions(struct ctl_relay_event *, | |||
77 | struct relay_rule *, struct kvlist *, struct kvlist *, | |||
78 | struct relay_table **); | |||
79 | void relay_httpdesc_free(struct http_descriptor *); | |||
80 | char * server_root_strip(char *, int); | |||
81 | ||||
82 | static struct relayd *env = NULL((void *)0); | |||
83 | ||||
84 | static struct http_method http_methods[] = HTTP_METHODS{ { HTTP_METHOD_GET, "GET" }, { HTTP_METHOD_HEAD, "HEAD" }, { HTTP_METHOD_POST, "POST" }, { HTTP_METHOD_PUT, "PUT" }, { HTTP_METHOD_DELETE , "DELETE" }, { HTTP_METHOD_OPTIONS, "OPTIONS" }, { HTTP_METHOD_TRACE , "TRACE" }, { HTTP_METHOD_CONNECT, "CONNECT" }, { HTTP_METHOD_PROPFIND , "PROPFIND" }, { HTTP_METHOD_PROPPATCH, "PROPPATCH" }, { HTTP_METHOD_MKCOL , "MKCOL" }, { HTTP_METHOD_COPY, "COPY" }, { HTTP_METHOD_MOVE , "MOVE" }, { HTTP_METHOD_LOCK, "LOCK" }, { HTTP_METHOD_UNLOCK , "UNLOCK" }, { HTTP_METHOD_VERSION_CONTROL, "VERSION-CONTROL" }, { HTTP_METHOD_REPORT, "REPORT" }, { HTTP_METHOD_CHECKOUT, "CHECKOUT" }, { HTTP_METHOD_CHECKIN, "CHECKIN" }, { HTTP_METHOD_UNCHECKOUT , "UNCHECKOUT" }, { HTTP_METHOD_MKWORKSPACE, "MKWORKSPACE" }, { HTTP_METHOD_UPDATE, "UPDATE" }, { HTTP_METHOD_LABEL, "LABEL" }, { HTTP_METHOD_MERGE, "MERGE" }, { HTTP_METHOD_BASELINE_CONTROL , "BASELINE-CONTROL" }, { HTTP_METHOD_MKACTIVITY, "MKACTIVITY" }, { HTTP_METHOD_ORDERPATCH, "ORDERPATCH" }, { HTTP_METHOD_ACL , "ACL" }, { HTTP_METHOD_MKREDIRECTREF, "MKREDIRECTREF" }, { HTTP_METHOD_UPDATEREDIRECTREF , "UPDATEREDIRECTREF" }, { HTTP_METHOD_SEARCH, "SEARCH" }, { HTTP_METHOD_PATCH , "PATCH" }, { HTTP_METHOD_NONE, ((void *)0) } }; | |||
85 | static struct http_error http_errors[] = HTTP_ERRORS{ { 100, "Continue" }, { 101, "Switching Protocols" }, { 102, "Processing" }, { 200, "OK" }, { 201, "Created" }, { 202, "Accepted" }, { 203, "Non-Authoritative Information" }, { 204, "No Content" }, { 205, "Reset Content" }, { 206, "Partial Content" }, { 207 , "Multi-Status" }, { 208, "Already Reported" }, { 226, "IM Used" }, { 300, "Multiple Choices" }, { 301, "Moved Permanently" } , { 302, "Found" }, { 303, "See Other" }, { 304, "Not Modified" }, { 305, "Use Proxy" }, { 306, "Switch Proxy" }, { 307, "Temporary Redirect" }, { 308, "Permanent Redirect" }, { 400, "Bad Request" }, { 401 , "Unauthorized" }, { 402, "Payment Required" }, { 403, "Forbidden" }, { 404, "Not Found" }, { 405, "Method Not Allowed" }, { 406 , "Not Acceptable" }, { 407, "Proxy Authentication Required" } , { 408, "Request Timeout" }, { 409, "Conflict" }, { 410, "Gone" }, { 411, "Length Required" }, { 412, "Precondition Failed" } , { 413, "Payload Too Large" }, { 414, "URI Too Long" }, { 415 , "Unsupported Media Type" }, { 416, "Range Not Satisfiable" } , { 417, "Expectation Failed" }, { 418, "I'm a teapot" }, { 420 , "Enhance Your Calm" }, { 422, "Unprocessable Entity" }, { 423 , "Locked" }, { 424, "Failed Dependency" }, { 426, "Upgrade Required" }, { 428, "Precondition Required" }, { 429, "Too Many Requests" }, { 431, "Request Header Fields Too Large" }, { 451, "Unavailable For Legal Reasons" }, { 500, "Internal Server Error" }, { 501, "Not Implemented" }, { 502, "Bad Gateway" }, { 503, "Service Unavailable" }, { 504, "Gateway Timeout" }, { 505, "HTTP Version Not Supported" }, { 506, "Variant Also Negotiates" }, { 507, "Insufficient Storage" }, { 508, "Loop Detected" }, { 510, "Not Extended" }, { 511, "Network Authentication Required" }, { 0, ((void *)0) } }; | |||
86 | ||||
87 | void | |||
88 | relay_http(struct relayd *x_env) | |||
89 | { | |||
90 | if (x_env != NULL((void *)0)) | |||
91 | env = x_env; | |||
92 | ||||
93 | DPRINTF("%s: sorting lookup tables, pid %d", __func__, getpid())do {} while(0); | |||
94 | ||||
95 | /* Sort the HTTP lookup arrays */ | |||
96 | qsort(http_methods, sizeof(http_methods) / | |||
97 | sizeof(http_methods[0]) - 1, | |||
98 | sizeof(http_methods[0]), relay_httpmethod_cmp); | |||
99 | qsort(http_errors, sizeof(http_errors) / | |||
100 | sizeof(http_errors[0]) - 1, | |||
101 | sizeof(http_errors[0]), relay_httperror_cmp); | |||
102 | } | |||
103 | ||||
104 | void | |||
105 | relay_http_init(struct relay *rlay) | |||
106 | { | |||
107 | rlay->rl_proto->close = relay_close_http; | |||
108 | ||||
109 | relay_http(NULL((void *)0)); | |||
110 | ||||
111 | /* Calculate skip step for the filter rules (may take a while) */ | |||
112 | relay_calc_skip_steps(&rlay->rl_proto->rules); | |||
113 | } | |||
114 | ||||
115 | int | |||
116 | relay_http_priv_init(struct rsession *con) | |||
117 | { | |||
118 | ||||
119 | struct http_session *hs; | |||
120 | ||||
121 | if ((hs = calloc(1, sizeof(*hs))) == NULL((void *)0)) | |||
122 | return (-1); | |||
123 | SIMPLEQ_INIT(&hs->hs_methods)do { (&hs->hs_methods)->sqh_first = ((void *)0); (& hs->hs_methods)->sqh_last = &(&hs->hs_methods )->sqh_first; } while (0); | |||
124 | DPRINTF("%s: session %d http_session %p", __func__,do {} while(0) | |||
125 | con->se_id, hs)do {} while(0); | |||
126 | con->se_priv = hs; | |||
127 | return (relay_httpdesc_init(&con->se_in)); | |||
128 | } | |||
129 | ||||
130 | int | |||
131 | relay_httpdesc_init(struct ctl_relay_event *cre) | |||
132 | { | |||
133 | struct http_descriptor *desc; | |||
134 | ||||
135 | if ((desc = calloc(1, sizeof(*desc))) == NULL((void *)0)) | |||
136 | return (-1); | |||
137 | ||||
138 | RB_INIT(&desc->http_headers)do { (&desc->http_headers)->rbh_root = ((void *)0); } while (0); | |||
139 | cre->desc = desc; | |||
140 | ||||
141 | return (0); | |||
142 | } | |||
143 | ||||
144 | void | |||
145 | relay_httpdesc_free(struct http_descriptor *desc) | |||
146 | { | |||
147 | if (desc == NULL((void *)0)) | |||
148 | return; | |||
149 | ||||
150 | free(desc->http_pathhttp_pathquery.kv_key); | |||
151 | desc->http_pathhttp_pathquery.kv_key = NULL((void *)0); | |||
152 | free(desc->http_queryhttp_pathquery.kv_value); | |||
153 | desc->http_queryhttp_pathquery.kv_value = NULL((void *)0); | |||
154 | free(desc->http_version); | |||
155 | desc->http_version = NULL((void *)0); | |||
156 | free(desc->query_keyhttp_matchquery.kv_key); | |||
157 | desc->query_keyhttp_matchquery.kv_key = NULL((void *)0); | |||
158 | free(desc->query_valhttp_matchquery.kv_value); | |||
159 | desc->query_valhttp_matchquery.kv_value = NULL((void *)0); | |||
160 | kv_purge(&desc->http_headers); | |||
161 | desc->http_lastheader = NULL((void *)0); | |||
162 | } | |||
163 | ||||
164 | static int | |||
165 | relay_http_header_name_valid(const char *name) | |||
166 | { | |||
167 | /* | |||
168 | * RFC 9110 specifies that only the following characters are | |||
169 | * permitted within HTTP header field names. | |||
170 | */ | |||
171 | const char token_chars[] = "!#$%&'*+-.^_`|~0123456789" | |||
172 | "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"; | |||
173 | const size_t len = strspn(name, token_chars); | |||
174 | ||||
175 | return (name[len] == '\0'); | |||
176 | } | |||
177 | ||||
178 | void | |||
179 | relay_read_http(struct bufferevent *bev, void *arg) | |||
180 | { | |||
181 | struct ctl_relay_event *cre = arg; | |||
182 | struct http_descriptor *desc = cre->desc; | |||
183 | struct rsession *con = cre->con; | |||
184 | struct relay *rlay = con->se_relay; | |||
185 | struct protocol *proto = rlay->rl_proto; | |||
186 | struct evbuffer *src = EVBUFFER_INPUT(bev)(bev)->input; | |||
187 | char *line = NULL((void *)0), *key, *value; | |||
188 | char *urlproto, *host, *path; | |||
189 | int action, unique, ret; | |||
190 | const char *errstr; | |||
191 | size_t size, linelen; | |||
192 | struct kv *hdr = NULL((void *)0); | |||
193 | struct kv *upgrade = NULL((void *)0), *upgrade_ws = NULL((void *)0); | |||
194 | struct kv *connection_close = NULL((void *)0); | |||
195 | int ws_response = 0; | |||
196 | struct http_method_node *hmn; | |||
197 | struct http_session *hs; | |||
198 | enum httpmethod request_method; | |||
199 | ||||
200 | getmonotime(&con->se_tv_last); | |||
201 | cre->timedout = 0; | |||
202 | ||||
203 | size = EVBUFFER_LENGTH(src)(src)->off; | |||
204 | DPRINTF("%s: session %d: size %lu, to read %lld",do {} while(0) | |||
205 | __func__, con->se_id, size, cre->toread)do {} while(0); | |||
206 | if (size == 0) { | |||
207 | if (cre->dir == RELAY_DIR_RESPONSE) | |||
208 | return; | |||
209 | cre->toread = TOREAD_HTTP_HEADER; | |||
210 | goto done; | |||
211 | } | |||
212 | ||||
213 | for (;;) { | |||
214 | line = evbuffer_readln(src, &linelen, EVBUFFER_EOL_CRLF); | |||
215 | if (line == NULL((void *)0)) { | |||
216 | /* | |||
217 | * We do not process the last header on premature | |||
218 | * EOF as it may not be complete. | |||
219 | */ | |||
220 | break; | |||
221 | } | |||
222 | ||||
223 | /* | |||
224 | * An empty line indicates the end of the request. | |||
225 | * libevent already stripped the \r\n for us. | |||
226 | */ | |||
227 | if (linelen == 0) { | |||
228 | cre->done = 1; | |||
229 | free(line); | |||
230 | line = NULL((void *)0); | |||
231 | if (cre->line > 1) { | |||
232 | /* Process last (complete) header line. */ | |||
233 | goto last_header; | |||
234 | } | |||
235 | break; | |||
236 | } | |||
237 | ||||
238 | /* Limit the total header length minus \r\n */ | |||
239 | cre->headerlen += linelen; | |||
240 | if (cre->headerlen > proto->httpheaderlen) { | |||
241 | relay_abort_http(con, 413, | |||
242 | "request headers too large", 0); | |||
243 | goto abort; | |||
244 | } | |||
245 | ||||
246 | /* Reject requests with an embedded NUL byte. */ | |||
247 | if (memchr(line, '\0', linelen) != NULL((void *)0)) { | |||
248 | relay_abort_http(con, 400, "malformed", 0); | |||
249 | goto abort; | |||
250 | } | |||
251 | ||||
252 | hs = con->se_priv; | |||
253 | DPRINTF("%s: session %d http_session %p", __func__,do {} while(0) | |||
254 | con->se_id, hs)do {} while(0); | |||
255 | ||||
256 | /* | |||
257 | * The first line is the GET/POST/PUT/... request, | |||
258 | * subsequent lines are HTTP headers. | |||
259 | */ | |||
260 | if (++cre->line == 1) { | |||
261 | key = line; | |||
262 | if ((value = strchr(key, ' ')) == NULL((void *)0)) { | |||
263 | relay_abort_http(con, 400, "malformed", 0); | |||
264 | goto abort; | |||
265 | } | |||
266 | *value++ = '\0'; | |||
267 | ||||
268 | if (cre->dir == RELAY_DIR_RESPONSE) { | |||
269 | desc->http_method = HTTP_METHOD_RESPONSE; | |||
270 | hmn = SIMPLEQ_FIRST(&hs->hs_methods)((&hs->hs_methods)->sqh_first); | |||
271 | ||||
272 | /* | |||
273 | * There is nothing preventing the relay from | |||
274 | * sending an unbalanced response. Be prepared. | |||
275 | */ | |||
276 | if (hmn == NULL((void *)0)) { | |||
277 | request_method = HTTP_METHOD_NONE; | |||
278 | DPRINTF("%s: session %d unbalanced "do {} while(0) | |||
279 | "response", __func__, con->se_id)do {} while(0); | |||
280 | } else { | |||
281 | SIMPLEQ_REMOVE_HEAD(&hs->hs_methods,do { if (((&hs->hs_methods)->sqh_first = (&hs-> hs_methods)->sqh_first->hmn_entry.sqe_next) == ((void * )0)) (&hs->hs_methods)->sqh_last = &(&hs-> hs_methods)->sqh_first; } while (0) | |||
282 | hmn_entry)do { if (((&hs->hs_methods)->sqh_first = (&hs-> hs_methods)->sqh_first->hmn_entry.sqe_next) == ((void * )0)) (&hs->hs_methods)->sqh_last = &(&hs-> hs_methods)->sqh_first; } while (0); | |||
283 | request_method = hmn->hmn_method; | |||
284 | DPRINTF("%s: session %d dequeuing %s",do {} while(0) | |||
285 | __func__, con->se_id,do {} while(0) | |||
286 | relay_httpmethod_byid(request_method))do {} while(0); | |||
287 | free(hmn); | |||
288 | } | |||
289 | ||||
290 | /* | |||
291 | * Decode response path and query | |||
292 | */ | |||
293 | desc->http_version = strdup(key); | |||
294 | if (desc->http_version == NULL((void *)0)) { | |||
295 | free(line); | |||
296 | goto fail; | |||
297 | } | |||
298 | desc->http_rescodehttp_pathquery.kv_key = strdup(value); | |||
299 | if (desc->http_rescodehttp_pathquery.kv_key == NULL((void *)0)) { | |||
300 | free(line); | |||
301 | goto fail; | |||
302 | } | |||
303 | desc->http_resmesghttp_pathquery.kv_value = strchr(desc->http_rescodehttp_pathquery.kv_key, | |||
304 | ' '); | |||
305 | if (desc->http_resmesghttp_pathquery.kv_value == NULL((void *)0)) { | |||
306 | free(line); | |||
307 | goto fail; | |||
308 | } | |||
309 | *desc->http_resmesghttp_pathquery.kv_value++ = '\0'; | |||
310 | desc->http_resmesghttp_pathquery.kv_value = strdup(desc->http_resmesghttp_pathquery.kv_value); | |||
311 | if (desc->http_resmesghttp_pathquery.kv_value == NULL((void *)0)) { | |||
312 | free(line); | |||
313 | goto fail; | |||
314 | } | |||
315 | desc->http_status = strtonum(desc->http_rescodehttp_pathquery.kv_key, | |||
316 | 100, 599, &errstr); | |||
317 | if (errstr) { | |||
318 | DPRINTF(do {} while(0) | |||
319 | "%s: http_status %s: errno %d, %s",do {} while(0) | |||
320 | __func__, desc->http_rescode, errno,do {} while(0) | |||
321 | errstr)do {} while(0); | |||
322 | free(line); | |||
323 | goto fail; | |||
324 | } | |||
325 | DPRINTF("http_version %s http_rescode %s "do {} while(0) | |||
326 | "http_resmesg %s", desc->http_version,do {} while(0) | |||
327 | desc->http_rescode, desc->http_resmesg)do {} while(0); | |||
328 | } else if (cre->dir == RELAY_DIR_REQUEST) { | |||
329 | desc->http_method = | |||
330 | relay_httpmethod_byname(key); | |||
331 | if (desc->http_method == HTTP_METHOD_NONE) { | |||
332 | free(line); | |||
333 | goto fail; | |||
334 | } | |||
335 | if ((hmn = calloc(1, sizeof *hmn)) == NULL((void *)0)) { | |||
336 | free(line); | |||
337 | goto fail; | |||
338 | } | |||
339 | hmn->hmn_method = desc->http_method; | |||
340 | DPRINTF("%s: session %d enqueuing %s",do {} while(0) | |||
341 | __func__, con->se_id,do {} while(0) | |||
342 | relay_httpmethod_byid(hmn->hmn_method))do {} while(0); | |||
343 | SIMPLEQ_INSERT_TAIL(&hs->hs_methods, hmn,do { (hmn)->hmn_entry.sqe_next = ((void *)0); *(&hs-> hs_methods)->sqh_last = (hmn); (&hs->hs_methods)-> sqh_last = &(hmn)->hmn_entry.sqe_next; } while (0) | |||
344 | hmn_entry)do { (hmn)->hmn_entry.sqe_next = ((void *)0); *(&hs-> hs_methods)->sqh_last = (hmn); (&hs->hs_methods)-> sqh_last = &(hmn)->hmn_entry.sqe_next; } while (0); | |||
345 | /* | |||
346 | * Decode request path and query | |||
347 | */ | |||
348 | desc->http_pathhttp_pathquery.kv_key = strdup(value); | |||
349 | if (desc->http_pathhttp_pathquery.kv_key == NULL((void *)0)) { | |||
350 | free(line); | |||
351 | goto fail; | |||
352 | } | |||
353 | desc->http_version = strchr(desc->http_pathhttp_pathquery.kv_key, | |||
354 | ' '); | |||
355 | if (desc->http_version == NULL((void *)0)) { | |||
356 | free(line); | |||
357 | goto fail; | |||
358 | } | |||
359 | *desc->http_version++ = '\0'; | |||
360 | desc->http_queryhttp_pathquery.kv_value = strchr(desc->http_pathhttp_pathquery.kv_key, '?'); | |||
361 | if (desc->http_queryhttp_pathquery.kv_value != NULL((void *)0)) | |||
362 | *desc->http_queryhttp_pathquery.kv_value++ = '\0'; | |||
363 | ||||
364 | /* | |||
365 | * Have to allocate the strings because they | |||
366 | * could be changed independently by the | |||
367 | * filters later. | |||
368 | */ | |||
369 | if ((desc->http_version = | |||
370 | strdup(desc->http_version)) == NULL((void *)0)) { | |||
371 | free(line); | |||
372 | goto fail; | |||
373 | } | |||
374 | if (desc->http_queryhttp_pathquery.kv_value != NULL((void *)0) && | |||
375 | (desc->http_queryhttp_pathquery.kv_value = | |||
376 | strdup(desc->http_queryhttp_pathquery.kv_value)) == NULL((void *)0)) { | |||
377 | free(line); | |||
378 | goto fail; | |||
379 | } | |||
380 | } | |||
381 | ||||
382 | free(line); | |||
383 | continue; | |||
384 | } | |||
385 | ||||
386 | /* Multiline headers wrap with a space or tab. */ | |||
387 | if (*line == ' ' || *line == '\t') { | |||
388 | if (cre->line == 2) { | |||
389 | /* First header line cannot start with space. */ | |||
390 | relay_abort_http(con, 400, "malformed", 0); | |||
391 | goto abort; | |||
392 | } | |||
393 | ||||
394 | /* Append line to the last header, if present */ | |||
395 | if (kv_extend(&desc->http_headers, | |||
396 | desc->http_lastheader, line) == NULL((void *)0)) { | |||
397 | free(line); | |||
398 | goto fail; | |||
399 | } | |||
400 | ||||
401 | free(line); | |||
402 | continue; | |||
403 | } | |||
404 | ||||
405 | /* Process the last complete header line. */ | |||
406 | last_header: | |||
407 | if (desc->http_lastheader != NULL((void *)0)) { | |||
408 | key = desc->http_lastheader->kv_key; | |||
409 | value = desc->http_lastheader->kv_value; | |||
410 | ||||
411 | DPRINTF("%s: session %d: header '%s: %s'", __func__,do {} while(0) | |||
412 | con->se_id, key, value)do {} while(0); | |||
413 | ||||
414 | if (desc->http_method != HTTP_METHOD_NONE && | |||
415 | strcasecmp("Content-Length", key) == 0) { | |||
416 | switch (desc->http_method) { | |||
417 | case HTTP_METHOD_TRACE: | |||
418 | case HTTP_METHOD_CONNECT: | |||
419 | /* | |||
420 | * These methods should not have a body | |||
421 | * and thus no Content-Length header. | |||
422 | */ | |||
423 | relay_abort_http(con, 400, "malformed", | |||
424 | 0); | |||
425 | goto abort; | |||
426 | case HTTP_METHOD_GET: | |||
427 | case HTTP_METHOD_HEAD: | |||
428 | case HTTP_METHOD_COPY: | |||
429 | case HTTP_METHOD_MOVE: | |||
430 | /* | |||
431 | * We strip the body (if present) from | |||
432 | * the GET, HEAD, COPY and MOVE methods | |||
433 | * so strip Content-Length too. | |||
434 | */ | |||
435 | kv_delete(&desc->http_headers, | |||
436 | desc->http_lastheader); | |||
437 | break; | |||
438 | case HTTP_METHOD_RESPONSE: | |||
439 | /* | |||
440 | * Strip Content-Length header from | |||
441 | * HEAD responses since there is no | |||
442 | * actual payload in the response. | |||
443 | */ | |||
444 | if (request_method == HTTP_METHOD_HEAD) { | |||
445 | kv_delete(&desc->http_headers, | |||
446 | desc->http_lastheader); | |||
447 | break; | |||
448 | } | |||
449 | /* FALLTHROUGH */ | |||
450 | default: | |||
451 | /* | |||
452 | * Need to read data from the client | |||
453 | * after the HTTP header. | |||
454 | * XXX What about non-standard clients | |||
455 | * not using the carriage return? And | |||
456 | * some browsers seem to include the | |||
457 | * line length in the content-length. | |||
458 | */ | |||
459 | if (*value == '+' || *value == '-') { | |||
460 | errstr = "invalid"; | |||
461 | } else { | |||
462 | cre->toread = strtonum(value, 0, | |||
463 | LLONG_MAX0x7fffffffffffffffLL, &errstr); | |||
464 | } | |||
465 | if (errstr) { | |||
466 | relay_abort_http(con, 500, | |||
467 | errstr, 0); | |||
468 | goto abort; | |||
469 | } | |||
470 | break; | |||
471 | } | |||
472 | /* | |||
473 | * Response with a status code of 1xx | |||
474 | * (Informational) or 204 (No Content) MUST | |||
475 | * not have a Content-Length (rfc 7230 3.3.3) | |||
476 | * Instead we check for value != 0 because there | |||
477 | * are servers that do not follow the rfc and | |||
478 | * send Content-Length: 0. | |||
479 | */ | |||
480 | if (desc->http_method == HTTP_METHOD_RESPONSE && | |||
481 | (((desc->http_status >= 100 && | |||
482 | desc->http_status < 200) || | |||
483 | desc->http_status == 204)) && | |||
484 | cre->toread != 0) { | |||
485 | relay_abort_http(con, 502, | |||
486 | "Bad Gateway", 0); | |||
487 | goto abort; | |||
488 | } | |||
489 | } | |||
490 | if (strcasecmp("Transfer-Encoding", key) == 0) { | |||
491 | /* We don't support other encodings. */ | |||
492 | if (strcasecmp("chunked", value) != 0) { | |||
493 | relay_abort_http(con, 400, | |||
494 | "malformed", 0); | |||
495 | goto abort; | |||
496 | } | |||
497 | desc->http_chunked = 1; | |||
498 | } | |||
499 | ||||
500 | if (strcasecmp("Host", key) == 0) { | |||
501 | /* | |||
502 | * The path may contain a URL. The host in the | |||
503 | * URL has to match the Host: value. | |||
504 | */ | |||
505 | if (parse_url(desc->http_pathhttp_pathquery.kv_key, | |||
506 | &urlproto, &host, &path) == 0) { | |||
507 | ret = strcasecmp(host, value); | |||
508 | free(urlproto); | |||
509 | free(host); | |||
510 | free(path); | |||
511 | if (ret != 0) { | |||
512 | relay_abort_http(con, 400, | |||
513 | "malformed host", 0); | |||
514 | goto abort; | |||
515 | } | |||
516 | } | |||
517 | } | |||
518 | } | |||
519 | ||||
520 | if (cre->done) | |||
521 | break; | |||
522 | ||||
523 | /* Validate header field name and check for missing value. */ | |||
524 | key = line; | |||
525 | if ((value = strchr(line, ':')) == NULL((void *)0)) { | |||
526 | relay_abort_http(con, 400, "malformed", 0); | |||
527 | goto abort; | |||
528 | } | |||
529 | *value++ = '\0'; | |||
530 | value += strspn(value, " \t\r\n"); | |||
531 | ||||
532 | if (!relay_http_header_name_valid(key)) { | |||
533 | relay_abort_http(con, 400, "malformed", 0); | |||
534 | goto abort; | |||
535 | } | |||
536 | ||||
537 | /* The "Host" header must only occur once. */ | |||
538 | unique = strcasecmp("Host", key) == 0; | |||
539 | ||||
540 | if ((hdr = kv_add(&desc->http_headers, key, | |||
541 | value, unique)) == NULL((void *)0)) { | |||
542 | relay_abort_http(con, 400, "malformed header", 0); | |||
543 | goto abort; | |||
544 | } | |||
545 | desc->http_lastheader = hdr; | |||
546 | ||||
547 | free(line); | |||
548 | } | |||
549 | ||||
550 | if (cre->done) { | |||
551 | if (desc->http_method == HTTP_METHOD_NONE) { | |||
552 | relay_abort_http(con, 406, "no method", 0); | |||
553 | return; | |||
554 | } | |||
555 | ||||
556 | action = relay_test(proto, cre); | |||
557 | switch (action) { | |||
558 | case RES_FAIL: | |||
559 | relay_close(con, "filter rule failed", 1); | |||
560 | return; | |||
561 | case RES_BAD: | |||
562 | relay_abort_http(con, 400, "Bad Request", | |||
563 | con->se_label); | |||
564 | return; | |||
565 | case RES_INTERNAL: | |||
566 | relay_abort_http(con, 500, "Internal Server Error", | |||
567 | con->se_label); | |||
568 | return; | |||
569 | } | |||
570 | if (action != RES_PASS) { | |||
571 | relay_abort_http(con, 403, "Forbidden", con->se_label); | |||
572 | return; | |||
573 | } | |||
574 | ||||
575 | /* | |||
576 | * HTTP 101 Switching Protocols | |||
577 | */ | |||
578 | ||||
579 | upgrade = kv_find_value(&desc->http_headers, | |||
580 | "Connection", "upgrade", ","); | |||
581 | upgrade_ws = kv_find_value(&desc->http_headers, | |||
582 | "Upgrade", "websocket", ","); | |||
583 | ws_response = 0; | |||
584 | if (cre->dir == RELAY_DIR_REQUEST && upgrade_ws != NULL((void *)0)) { | |||
585 | if ((proto->httpflags & HTTPFLAG_WEBSOCKETS0x01) == 0) { | |||
586 | relay_abort_http(con, 403, | |||
587 | "Websocket Forbidden", 0); | |||
588 | return; | |||
589 | } else if (upgrade == NULL((void *)0)) { | |||
590 | relay_abort_http(con, 400, | |||
591 | "Bad Websocket Request", 0); | |||
592 | return; | |||
593 | } else if (desc->http_method != HTTP_METHOD_GET) { | |||
594 | relay_abort_http(con, 405, | |||
595 | "Websocket Method Not Allowed", 0); | |||
596 | return; | |||
597 | } | |||
598 | } else if (cre->dir == RELAY_DIR_RESPONSE && | |||
599 | desc->http_status == 101) { | |||
600 | if (upgrade_ws != NULL((void *)0) && upgrade != NULL((void *)0) && | |||
601 | (proto->httpflags & HTTPFLAG_WEBSOCKETS0x01)) { | |||
602 | ws_response = 1; | |||
603 | cre->dst->toread = TOREAD_UNLIMITED; | |||
604 | cre->dst->bev->readcb = relay_read; | |||
605 | } else { | |||
606 | relay_abort_http(con, 502, | |||
607 | "Bad Websocket Gateway", 0); | |||
608 | return; | |||
609 | } | |||
610 | } | |||
611 | ||||
612 | connection_close = kv_find_value(&desc->http_headers, | |||
613 | "Connection", "close", ","); | |||
614 | ||||
615 | switch (desc->http_method) { | |||
616 | case HTTP_METHOD_CONNECT: | |||
617 | /* Data stream */ | |||
618 | cre->toread = TOREAD_UNLIMITED; | |||
619 | bev->readcb = relay_read; | |||
620 | break; | |||
621 | case HTTP_METHOD_GET: | |||
622 | case HTTP_METHOD_HEAD: | |||
623 | /* WebDAV methods */ | |||
624 | case HTTP_METHOD_COPY: | |||
625 | case HTTP_METHOD_MOVE: | |||
626 | cre->toread = 0; | |||
627 | break; | |||
628 | case HTTP_METHOD_DELETE: | |||
629 | case HTTP_METHOD_OPTIONS: | |||
630 | case HTTP_METHOD_POST: | |||
631 | case HTTP_METHOD_PUT: | |||
632 | case HTTP_METHOD_RESPONSE: | |||
633 | /* WebDAV methods */ | |||
634 | case HTTP_METHOD_PROPFIND: | |||
635 | case HTTP_METHOD_PROPPATCH: | |||
636 | case HTTP_METHOD_MKCOL: | |||
637 | case HTTP_METHOD_LOCK: | |||
638 | case HTTP_METHOD_UNLOCK: | |||
639 | case HTTP_METHOD_VERSION_CONTROL: | |||
640 | case HTTP_METHOD_REPORT: | |||
641 | case HTTP_METHOD_CHECKOUT: | |||
642 | case HTTP_METHOD_CHECKIN: | |||
643 | case HTTP_METHOD_UNCHECKOUT: | |||
644 | case HTTP_METHOD_MKWORKSPACE: | |||
645 | case HTTP_METHOD_UPDATE: | |||
646 | case HTTP_METHOD_LABEL: | |||
647 | case HTTP_METHOD_MERGE: | |||
648 | case HTTP_METHOD_BASELINE_CONTROL: | |||
649 | case HTTP_METHOD_MKACTIVITY: | |||
650 | case HTTP_METHOD_ORDERPATCH: | |||
651 | case HTTP_METHOD_ACL: | |||
652 | case HTTP_METHOD_MKREDIRECTREF: | |||
653 | case HTTP_METHOD_UPDATEREDIRECTREF: | |||
654 | case HTTP_METHOD_SEARCH: | |||
655 | case HTTP_METHOD_PATCH: | |||
656 | /* HTTP request payload */ | |||
657 | if (cre->toread > 0) { | |||
658 | bev->readcb = relay_read_httpcontent; | |||
659 | } | |||
660 | ||||
661 | /* Single-pass HTTP body */ | |||
662 | if (cre->toread < 0) { | |||
663 | cre->toread = TOREAD_UNLIMITED; | |||
664 | bev->readcb = relay_read; | |||
665 | } | |||
666 | break; | |||
667 | default: | |||
668 | /* HTTP handler */ | |||
669 | cre->toread = TOREAD_HTTP_HEADER; | |||
670 | bev->readcb = relay_read_http; | |||
671 | break; | |||
672 | } | |||
673 | if (desc->http_chunked) { | |||
674 | /* Chunked transfer encoding */ | |||
675 | cre->toread = TOREAD_HTTP_CHUNK_LENGTH; | |||
676 | bev->readcb = relay_read_httpchunks; | |||
677 | } | |||
678 | ||||
679 | /* | |||
680 | * Ask the server to close the connection after this request | |||
681 | * since we don't read any further request headers. Only add | |||
682 | * this header if it does not already exist or if this is a | |||
683 | * outbound websocket upgrade response. | |||
684 | */ | |||
685 | if (cre->toread == TOREAD_UNLIMITED && | |||
686 | connection_close == NULL((void *)0) && !ws_response) | |||
687 | if (kv_add(&desc->http_headers, "Connection", | |||
688 | "close", 0) == NULL((void *)0)) | |||
689 | goto fail; | |||
690 | ||||
691 | if (cre->dir == RELAY_DIR_REQUEST) { | |||
692 | if (relay_writerequest_http(cre->dst, cre) == -1) | |||
693 | goto fail; | |||
694 | } else { | |||
695 | if (relay_writeresponse_http(cre->dst, cre) == -1) | |||
696 | goto fail; | |||
697 | } | |||
698 | if (relay_bufferevent_print(cre->dst, "\r\n") == -1 || | |||
699 | relay_writeheader_http(cre->dst, cre) == -1 || | |||
700 | relay_bufferevent_print(cre->dst, "\r\n") == -1) | |||
701 | goto fail; | |||
702 | ||||
703 | relay_reset_http(cre); | |||
704 | done: | |||
705 | if (cre->dir == RELAY_DIR_REQUEST && cre->toread <= 0 && | |||
706 | cre->dst->state != STATE_CONNECTED) { | |||
707 | if (rlay->rl_conf.fwdmode == FWD_TRANS) { | |||
708 | relay_bindanyreq(con, 0, IPPROTO_TCP6); | |||
709 | return; | |||
710 | } | |||
711 | if (relay_connect(con) == -1) { | |||
712 | relay_abort_http(con, 502, "session failed", 0); | |||
713 | return; | |||
714 | } | |||
715 | } | |||
716 | } | |||
717 | if (con->se_done) { | |||
718 | relay_close(con, "last http read (done)", 0); | |||
719 | return; | |||
720 | } | |||
721 | switch (relay_splice(cre)) { | |||
722 | case -1: | |||
723 | relay_close(con, strerror(errno(*__errno())), 1); | |||
724 | case 1: | |||
725 | return; | |||
726 | case 0: | |||
727 | break; | |||
728 | } | |||
729 | bufferevent_enable(bev, EV_READ0x02); | |||
730 | if (EVBUFFER_LENGTH(src)(src)->off && bev->readcb != relay_read_http) | |||
731 | bev->readcb(bev, arg); | |||
732 | /* The callback readcb() might have freed the session. */ | |||
733 | return; | |||
734 | fail: | |||
735 | relay_abort_http(con, 500, strerror(errno(*__errno())), 0); | |||
736 | return; | |||
737 | abort: | |||
738 | free(line); | |||
739 | } | |||
740 | ||||
741 | void | |||
742 | relay_read_httpcontent(struct bufferevent *bev, void *arg) | |||
743 | { | |||
744 | struct ctl_relay_event *cre = arg; | |||
745 | struct rsession *con = cre->con; | |||
746 | struct protocol *proto = con->se_relay->rl_proto; | |||
747 | ||||
748 | struct evbuffer *src = EVBUFFER_INPUT(bev)(bev)->input; | |||
749 | size_t size; | |||
750 | ||||
751 | getmonotime(&con->se_tv_last); | |||
752 | cre->timedout = 0; | |||
753 | ||||
754 | size = EVBUFFER_LENGTH(src)(src)->off; | |||
755 | DPRINTF("%s: session %d: size %lu, to read %lld", __func__,do {} while(0) | |||
756 | con->se_id, size, cre->toread)do {} while(0); | |||
757 | if (!size) | |||
758 | return; | |||
759 | if (relay_spliceadjust(cre) == -1) | |||
760 | goto fail; | |||
761 | ||||
762 | if (cre->toread > 0) { | |||
763 | /* Read content data */ | |||
764 | if ((off_t)size > cre->toread) { | |||
765 | size = cre->toread; | |||
766 | if (relay_bufferevent_write_chunk(cre->dst, src, size) | |||
767 | == -1) | |||
768 | goto fail; | |||
769 | cre->toread = 0; | |||
770 | } else { | |||
771 | if (relay_bufferevent_write_buffer(cre->dst, src) == -1) | |||
772 | goto fail; | |||
773 | cre->toread -= size; | |||
774 | } | |||
775 | DPRINTF("%s: done, size %lu, to read %lld", __func__,do {} while(0) | |||
776 | size, cre->toread)do {} while(0); | |||
777 | } | |||
778 | if (cre->toread == 0) { | |||
779 | cre->toread = TOREAD_HTTP_HEADER; | |||
780 | bev->readcb = relay_read_http; | |||
781 | } | |||
782 | if (con->se_done) | |||
783 | goto done; | |||
784 | bufferevent_enable(bev, EV_READ0x02); | |||
785 | ||||
786 | if (cre->dst->bev && EVBUFFER_LENGTH(EVBUFFER_OUTPUT(cre->dst->bev))((cre->dst->bev)->output)->off > | |||
787 | (size_t)RELAY_MAX_PREFETCH256 * proto->tcpbufsiz) | |||
788 | bufferevent_disable(cre->bev, EV_READ0x02); | |||
789 | ||||
790 | if (bev->readcb != relay_read_httpcontent) | |||
791 | bev->readcb(bev, arg); | |||
792 | /* The callback readcb() might have freed the session. */ | |||
793 | return; | |||
794 | done: | |||
795 | relay_close(con, "last http content read", 0); | |||
796 | return; | |||
797 | fail: | |||
798 | relay_close(con, strerror(errno(*__errno())), 1); | |||
799 | } | |||
800 | ||||
801 | void | |||
802 | relay_read_httpchunks(struct bufferevent *bev, void *arg) | |||
803 | { | |||
804 | struct ctl_relay_event *cre = arg; | |||
805 | struct rsession *con = cre->con; | |||
806 | struct protocol *proto = con->se_relay->rl_proto; | |||
807 | struct evbuffer *src = EVBUFFER_INPUT(bev)(bev)->input; | |||
808 | char *line, *ep; | |||
809 | long long llval; | |||
810 | size_t size, linelen; | |||
811 | ||||
812 | getmonotime(&con->se_tv_last); | |||
813 | cre->timedout = 0; | |||
814 | ||||
815 | size = EVBUFFER_LENGTH(src)(src)->off; | |||
816 | DPRINTF("%s: session %d: size %lu, to read %lld", __func__,do {} while(0) | |||
817 | con->se_id, size, cre->toread)do {} while(0); | |||
818 | if (!size) | |||
819 | return; | |||
820 | if (relay_spliceadjust(cre) == -1) | |||
821 | goto fail; | |||
822 | ||||
823 | if (cre->toread > 0) { | |||
824 | /* Read chunk data */ | |||
825 | if ((off_t)size > cre->toread) { | |||
826 | size = cre->toread; | |||
827 | if (relay_bufferevent_write_chunk(cre->dst, src, size) | |||
828 | == -1) | |||
829 | goto fail; | |||
830 | cre->toread = 0; | |||
831 | } else { | |||
832 | if (relay_bufferevent_write_buffer(cre->dst, src) == -1) | |||
833 | goto fail; | |||
834 | cre->toread -= size; | |||
835 | } | |||
836 | DPRINTF("%s: done, size %lu, to read %lld", __func__,do {} while(0) | |||
837 | size, cre->toread)do {} while(0); | |||
838 | } | |||
839 | switch (cre->toread) { | |||
840 | case TOREAD_HTTP_CHUNK_LENGTH: | |||
841 | line = evbuffer_readln(src, &linelen, EVBUFFER_EOL_CRLF); | |||
842 | if (line == NULL((void *)0)) { | |||
843 | /* Ignore empty line, continue */ | |||
844 | bufferevent_enable(bev, EV_READ0x02); | |||
845 | return; | |||
846 | } | |||
847 | if (linelen == 0) { | |||
848 | free(line); | |||
849 | goto next; | |||
850 | } | |||
851 | ||||
852 | /* | |||
853 | * Read prepended chunk size in hex without leading +0[Xx]. | |||
854 | * The returned signed value must not be negative. | |||
855 | */ | |||
856 | if (line[0] == '+' || line[0] == '-' || | |||
857 | (line[0] == '0' && (line[1] == 'x' || line[1] == 'X'))) { | |||
858 | /* Reject values like 0xdead and 0XBEEF or +FEED. */ | |||
859 | ep = line; | |||
860 | } else { | |||
861 | errno(*__errno()) = 0; | |||
862 | llval = strtoll(line, &ep, 16); | |||
863 | } | |||
864 | if (ep == line || *ep != '\0' || llval < 0 || | |||
865 | (errno(*__errno()) == ERANGE34 && llval == LLONG_MAX0x7fffffffffffffffLL)) { | |||
866 | free(line); | |||
867 | relay_close(con, "invalid chunk size", 1); | |||
868 | return; | |||
869 | } | |||
870 | ||||
871 | if (relay_bufferevent_print(cre->dst, line) == -1 || | |||
872 | relay_bufferevent_print(cre->dst, "\r\n") == -1) { | |||
873 | free(line); | |||
874 | goto fail; | |||
875 | } | |||
876 | free(line); | |||
877 | ||||
878 | if ((cre->toread = llval) == 0) { | |||
879 | DPRINTF("%s: last chunk", __func__)do {} while(0); | |||
880 | cre->toread = TOREAD_HTTP_CHUNK_TRAILER; | |||
881 | } | |||
882 | break; | |||
883 | case TOREAD_HTTP_CHUNK_TRAILER: | |||
884 | /* Last chunk is 0 bytes followed by trailer and empty line */ | |||
885 | line = evbuffer_readln(src, &linelen, EVBUFFER_EOL_CRLF); | |||
886 | if (line == NULL((void *)0)) { | |||
887 | /* Ignore empty line, continue */ | |||
888 | bufferevent_enable(bev, EV_READ0x02); | |||
889 | return; | |||
890 | } | |||
891 | if (relay_bufferevent_print(cre->dst, line) == -1 || | |||
892 | relay_bufferevent_print(cre->dst, "\r\n") == -1) { | |||
893 | free(line); | |||
894 | goto fail; | |||
895 | } | |||
896 | if (linelen == 0) { | |||
897 | /* Switch to HTTP header mode */ | |||
898 | cre->toread = TOREAD_HTTP_HEADER; | |||
899 | bev->readcb = relay_read_http; | |||
900 | } | |||
901 | free(line); | |||
902 | break; | |||
903 | case 0: | |||
904 | /* Chunk is terminated by an empty newline */ | |||
905 | line = evbuffer_readln(src, &linelen, EVBUFFER_EOL_CRLF); | |||
906 | free(line); | |||
907 | if (relay_bufferevent_print(cre->dst, "\r\n") == -1) | |||
908 | goto fail; | |||
909 | cre->toread = TOREAD_HTTP_CHUNK_LENGTH; | |||
910 | break; | |||
911 | } | |||
912 | ||||
913 | next: | |||
914 | if (con->se_done) | |||
915 | goto done; | |||
916 | bufferevent_enable(bev, EV_READ0x02); | |||
917 | ||||
918 | if (cre->dst->bev && EVBUFFER_LENGTH(EVBUFFER_OUTPUT(cre->dst->bev))((cre->dst->bev)->output)->off > | |||
919 | (size_t)RELAY_MAX_PREFETCH256 * proto->tcpbufsiz) | |||
920 | bufferevent_disable(cre->bev, EV_READ0x02); | |||
921 | ||||
922 | if (EVBUFFER_LENGTH(src)(src)->off) | |||
923 | bev->readcb(bev, arg); | |||
924 | /* The callback readcb() might have freed the session. */ | |||
925 | return; | |||
926 | ||||
927 | done: | |||
928 | relay_close(con, "last http chunk read (done)", 0); | |||
929 | return; | |||
930 | fail: | |||
931 | relay_close(con, strerror(errno(*__errno())), 1); | |||
932 | } | |||
933 | ||||
934 | void | |||
935 | relay_reset_http(struct ctl_relay_event *cre) | |||
936 | { | |||
937 | struct http_descriptor *desc = cre->desc; | |||
938 | ||||
939 | relay_httpdesc_free(desc); | |||
940 | desc->http_method = 0; | |||
941 | desc->http_chunked = 0; | |||
942 | cre->headerlen = 0; | |||
943 | cre->line = 0; | |||
944 | cre->done = 0; | |||
945 | } | |||
946 | ||||
947 | static int | |||
948 | _relay_lookup_url(struct ctl_relay_event *cre, char *host, char *path, | |||
949 | char *query, struct kv *kv) | |||
950 | { | |||
951 | struct rsession *con = cre->con; | |||
952 | char *val, *md = NULL((void *)0); | |||
953 | int ret = RES_FAIL; | |||
954 | const char *str = NULL((void *)0); | |||
955 | ||||
956 | if (asprintf(&val, "%s%s%s%s", | |||
957 | host, path, | |||
958 | query == NULL((void *)0) ? "" : "?", | |||
959 | query == NULL((void *)0) ? "" : query) == -1) { | |||
960 | relay_abort_http(con, 500, "failed to allocate URL", 0); | |||
961 | return (RES_FAIL); | |||
962 | } | |||
963 | ||||
964 | switch (kv->kv_digest) { | |||
965 | case DIGEST_SHA1: | |||
966 | case DIGEST_MD5: | |||
967 | if ((md = digeststr(kv->kv_digest, | |||
968 | val, strlen(val), NULL((void *)0))) == NULL((void *)0)) { | |||
969 | relay_abort_http(con, 500, | |||
970 | "failed to allocate digest", 0); | |||
971 | goto fail; | |||
972 | } | |||
973 | str = md; | |||
974 | break; | |||
975 | case DIGEST_NONE: | |||
976 | str = val; | |||
977 | break; | |||
978 | } | |||
979 | ||||
980 | DPRINTF("%s: session %d: %s, %s: %d", __func__, con->se_id,do {} while(0) | |||
981 | str, kv->kv_key, strcasecmp(kv->kv_key, str))do {} while(0); | |||
982 | ||||
983 | if (strcasecmp(kv->kv_key, str) == 0) { | |||
984 | ret = RES_DROP; | |||
985 | goto fail; | |||
986 | } | |||
987 | ||||
988 | ret = RES_PASS; | |||
989 | fail: | |||
990 | free(md); | |||
991 | free(val); | |||
992 | return (ret); | |||
993 | } | |||
994 | ||||
995 | int | |||
996 | relay_lookup_url(struct ctl_relay_event *cre, const char *host, struct kv *kv) | |||
997 | { | |||
998 | struct http_descriptor *desc = (struct http_descriptor *)cre->desc; | |||
999 | int i, j, dots; | |||
1000 | char *hi[RELAY_MAXLOOKUPLEVELS5], *p, *pp, *c, ch; | |||
1001 | char ph[HOST_NAME_MAX255+1]; | |||
1002 | int ret; | |||
1003 | ||||
1004 | if (desc->http_pathhttp_pathquery.kv_key == NULL((void *)0)) | |||
1005 | return (RES_PASS); | |||
1006 | ||||
1007 | /* | |||
1008 | * This is an URL lookup algorithm inspired by | |||
1009 | * http://code.google.com/apis/safebrowsing/ | |||
1010 | * developers_guide.html#PerformingLookups | |||
1011 | */ | |||
1012 | ||||
1013 | DPRINTF("%s: host '%s', path '%s', query '%s'",do {} while(0) | |||
1014 | __func__, host, desc->http_path,do {} while(0) | |||
1015 | desc->http_query == NULL ? "" : desc->http_query)do {} while(0); | |||
1016 | ||||
1017 | if (canonicalize_host(host, ph, sizeof(ph)) == NULL((void *)0)) { | |||
1018 | return (RES_BAD); | |||
1019 | } | |||
1020 | ||||
1021 | bzero(hi, sizeof(hi)); | |||
1022 | for (dots = -1, i = strlen(ph) - 1; i > 0; i--) { | |||
1023 | if (ph[i] == '.' && ++dots) | |||
1024 | hi[dots - 1] = &ph[i + 1]; | |||
1025 | if (dots > (RELAY_MAXLOOKUPLEVELS5 - 2)) | |||
1026 | break; | |||
1027 | } | |||
1028 | if (dots == -1) | |||
1029 | dots = 0; | |||
1030 | hi[dots] = ph; | |||
1031 | ||||
1032 | if ((pp = strdup(desc->http_pathhttp_pathquery.kv_key)) == NULL((void *)0)) { | |||
1033 | return (RES_INTERNAL); | |||
1034 | } | |||
1035 | for (i = (RELAY_MAXLOOKUPLEVELS5 - 1); i >= 0; i--) { | |||
1036 | if (hi[i] == NULL((void *)0)) | |||
1037 | continue; | |||
1038 | ||||
1039 | /* 1. complete path with query */ | |||
1040 | if (desc->http_queryhttp_pathquery.kv_value != NULL((void *)0)) | |||
1041 | if ((ret = _relay_lookup_url(cre, hi[i], | |||
1042 | pp, desc->http_queryhttp_pathquery.kv_value, kv)) != RES_PASS) | |||
1043 | goto done; | |||
1044 | ||||
1045 | /* 2. complete path without query */ | |||
1046 | if ((ret = _relay_lookup_url(cre, hi[i], | |||
1047 | pp, NULL((void *)0), kv)) != RES_PASS) | |||
1048 | goto done; | |||
1049 | ||||
1050 | /* 3. traverse path */ | |||
1051 | for (j = 0, p = strchr(pp, '/'); | |||
1052 | p != NULL((void *)0); p = strchr(p, '/'), j++) { | |||
1053 | if (j > (RELAY_MAXLOOKUPLEVELS5 - 2) || *(++p) == '\0') | |||
1054 | break; | |||
1055 | c = &pp[p - pp]; | |||
1056 | ch = *c; | |||
1057 | *c = '\0'; | |||
1058 | if ((ret = _relay_lookup_url(cre, hi[i], | |||
1059 | pp, NULL((void *)0), kv)) != RES_PASS) | |||
1060 | goto done; | |||
1061 | *c = ch; | |||
1062 | } | |||
1063 | } | |||
1064 | ||||
1065 | ret = RES_PASS; | |||
1066 | done: | |||
1067 | free(pp); | |||
1068 | return (ret); | |||
1069 | } | |||
1070 | ||||
1071 | int | |||
1072 | relay_lookup_cookie(struct ctl_relay_event *cre, const char *str, | |||
1073 | struct kv *kv) | |||
1074 | { | |||
1075 | char *val, *ptr, *key, *value; | |||
1076 | int ret; | |||
1077 | ||||
1078 | if ((val = strdup(str)) == NULL((void *)0)) { | |||
1079 | return (RES_INTERNAL); | |||
1080 | } | |||
1081 | ||||
1082 | for (ptr = val; ptr != NULL((void *)0) && strlen(ptr);) { | |||
1083 | if (*ptr == ' ') | |||
1084 | *ptr++ = '\0'; | |||
1085 | key = ptr; | |||
1086 | if ((ptr = strchr(ptr, ';')) != NULL((void *)0)) | |||
1087 | *ptr++ = '\0'; | |||
1088 | /* | |||
1089 | * XXX We do not handle attributes | |||
1090 | * ($Path, $Domain, or $Port) | |||
1091 | */ | |||
1092 | if (*key == '$') | |||
1093 | continue; | |||
1094 | ||||
1095 | if ((value = | |||
1096 | strchr(key, '=')) == NULL((void *)0) || | |||
1097 | strlen(value) < 1) | |||
1098 | continue; | |||
1099 | *value++ = '\0'; | |||
1100 | if (*value == '"') | |||
1101 | *value++ = '\0'; | |||
1102 | if (value[strlen(value) - 1] == '"') | |||
1103 | value[strlen(value) - 1] = '\0'; | |||
1104 | ||||
1105 | DPRINTF("%s: key %s = %s, %s = %s : %d",do {} while(0) | |||
1106 | __func__, key, value, kv->kv_key, kv->kv_value,do {} while(0) | |||
1107 | strcasecmp(kv->kv_key, key))do {} while(0); | |||
1108 | ||||
1109 | if (strcasecmp(kv->kv_key, key) == 0 && | |||
1110 | ((kv->kv_value == NULL((void *)0)) || | |||
1111 | (fnmatch(kv->kv_value, value, | |||
1112 | FNM_CASEFOLD0x10) != FNM_NOMATCH1))) { | |||
1113 | ret = RES_DROP; | |||
1114 | goto done; | |||
1115 | } | |||
1116 | } | |||
1117 | ||||
1118 | ret = RES_PASS; | |||
1119 | ||||
1120 | done: | |||
1121 | free(val); | |||
1122 | return (ret); | |||
1123 | } | |||
1124 | ||||
1125 | int | |||
1126 | relay_lookup_query(struct ctl_relay_event *cre, struct kv *kv) | |||
1127 | { | |||
1128 | struct http_descriptor *desc = cre->desc; | |||
1129 | struct kv *match = &desc->http_matchquery; | |||
1130 | char *val, *ptr, *tmpkey = NULL((void *)0), *tmpval = NULL((void *)0); | |||
1131 | int ret = -1; | |||
1132 | ||||
1133 | if (desc->http_queryhttp_pathquery.kv_value == NULL((void *)0)) | |||
1134 | return (-1); | |||
1135 | if ((val = strdup(desc->http_queryhttp_pathquery.kv_value)) == NULL((void *)0)) { | |||
1136 | return (RES_INTERNAL); | |||
1137 | } | |||
1138 | ||||
1139 | ptr = val; | |||
1140 | while (ptr != NULL((void *)0) && strlen(ptr)) { | |||
1141 | tmpkey = ptr; | |||
1142 | if ((ptr = strchr(ptr, '&')) != NULL((void *)0)) | |||
1143 | *ptr++ = '\0'; | |||
1144 | if ((tmpval = strchr(tmpkey, '=')) == NULL((void *)0) || strlen(tmpval) | |||
1145 | < 1) | |||
1146 | continue; | |||
1147 | *tmpval++ = '\0'; | |||
1148 | ||||
1149 | if (fnmatch(kv->kv_key, tmpkey, 0) != FNM_NOMATCH1 && | |||
1150 | (kv->kv_value == NULL((void *)0) || fnmatch(kv->kv_value, tmpval, 0) | |||
1151 | != FNM_NOMATCH1)) | |||
1152 | break; | |||
1153 | else | |||
1154 | tmpkey = NULL((void *)0); | |||
1155 | } | |||
1156 | ||||
1157 | if (tmpkey == NULL((void *)0) || tmpval == NULL((void *)0)) | |||
1158 | goto done; | |||
1159 | ||||
1160 | match->kv_key = strdup(tmpkey); | |||
1161 | if (match->kv_key == NULL((void *)0)) | |||
1162 | goto done; | |||
1163 | match->kv_value = strdup(tmpval); | |||
1164 | if (match->kv_key == NULL((void *)0)) | |||
1165 | goto done; | |||
1166 | ret = 0; | |||
1167 | ||||
1168 | done: | |||
1169 | free(val); | |||
1170 | return (ret); | |||
1171 | } | |||
1172 | ||||
1173 | ssize_t | |||
1174 | relay_http_time(time_t t, char *tmbuf, size_t len) | |||
1175 | { | |||
1176 | struct tm tm; | |||
1177 | ||||
1178 | /* New HTTP/1.1 RFC 7231 prefers IMF-fixdate from RFC 5322 */ | |||
1179 | if (t == -1 || gmtime_r(&t, &tm) == NULL((void *)0)) | |||
1180 | return (-1); | |||
1181 | else | |||
1182 | return (strftime(tmbuf, len, "%a, %d %h %Y %T %Z", &tm)); | |||
1183 | } | |||
1184 | ||||
1185 | void | |||
1186 | relay_abort_http(struct rsession *con, u_int code, const char *msg, | |||
1187 | u_int16_t labelid) | |||
1188 | { | |||
1189 | struct relay *rlay = con->se_relay; | |||
1190 | struct bufferevent *bev = con->se_in.bev; | |||
1191 | const char *httperr = NULL((void *)0), *text = ""; | |||
1192 | char *httpmsg, *body = NULL((void *)0); | |||
1193 | char tmbuf[32], hbuf[128]; | |||
1194 | const char *style, *label = NULL((void *)0); | |||
1195 | int bodylen; | |||
1196 | ||||
1197 | if ((httperr = relay_httperror_byid(code)) == NULL((void *)0)) | |||
1198 | httperr = "Unknown Error"; | |||
1199 | ||||
1200 | if (labelid != 0) | |||
1201 | label = label_id2name(labelid); | |||
1202 | ||||
1203 | /* In some cases this function may be called from generic places */ | |||
1204 | if (rlay->rl_proto->type != RELAY_PROTO_HTTP || | |||
1205 | (rlay->rl_proto->flags & F_RETURN0x00020000) == 0) { | |||
1206 | relay_close(con, msg, 0); | |||
1207 | return; | |||
1208 | } | |||
1209 | ||||
1210 | if (bev == NULL((void *)0)) | |||
1211 | goto done; | |||
1212 | ||||
1213 | /* Some system information */ | |||
1214 | if (print_host(&rlay->rl_conf.ss, hbuf, sizeof(hbuf)) == NULL((void *)0)) | |||
1215 | goto done; | |||
1216 | ||||
1217 | if (relay_http_time(time(NULL((void *)0)), tmbuf, sizeof(tmbuf)) <= 0) | |||
1218 | goto done; | |||
1219 | ||||
1220 | /* Do not send details of the Internal Server Error */ | |||
1221 | switch (code) { | |||
1222 | case 500: | |||
1223 | break; | |||
1224 | default: | |||
1225 | text = msg; | |||
1226 | break; | |||
1227 | } | |||
1228 | ||||
1229 | /* A CSS stylesheet allows minimal customization by the user */ | |||
1230 | style = (rlay->rl_proto->style != NULL((void *)0)) ? rlay->rl_proto->style : | |||
1231 | "body { background-color: #a00000; color: white; font-family: " | |||
1232 | "'Comic Sans MS', 'Chalkboard SE', 'Comic Neue', sans-serif; }\n" | |||
1233 | "hr { border: 0; border-bottom: 1px dashed; }\n"; | |||
1234 | ||||
1235 | /* Generate simple HTTP+HTML error document */ | |||
1236 | if ((bodylen = asprintf(&body, | |||
1237 | "<!DOCTYPE html>\n" | |||
1238 | "<html>\n" | |||
1239 | "<head>\n" | |||
1240 | "<title>%03d %s</title>\n" | |||
1241 | "<style type=\"text/css\"><!--\n%s\n--></style>\n" | |||
1242 | "</head>\n" | |||
1243 | "<body>\n" | |||
1244 | "<h1>%s</h1>\n" | |||
1245 | "<div id='m'>%s</div>\n" | |||
1246 | "<div id='l'>%s</div>\n" | |||
1247 | "<hr><address>%s at %s port %d</address>\n" | |||
1248 | "</body>\n" | |||
1249 | "</html>\n", | |||
1250 | code, httperr, style, httperr, text, | |||
1251 | label == NULL((void *)0) ? "" : label, | |||
1252 | RELAYD_SERVERNAME"OpenBSD relayd", hbuf, ntohs(rlay->rl_conf.port)(__uint16_t)(__builtin_constant_p(rlay->rl_conf.port) ? (__uint16_t )(((__uint16_t)(rlay->rl_conf.port) & 0xffU) << 8 | ((__uint16_t)(rlay->rl_conf.port) & 0xff00U) >> 8) : __swap16md(rlay->rl_conf.port)))) == -1) | |||
1253 | goto done; | |||
1254 | ||||
1255 | /* Generate simple HTTP+HTML error document */ | |||
1256 | if (asprintf(&httpmsg, | |||
1257 | "HTTP/1.0 %03d %s\r\n" | |||
1258 | "Date: %s\r\n" | |||
1259 | "Server: %s\r\n" | |||
1260 | "Connection: close\r\n" | |||
1261 | "Content-Type: text/html\r\n" | |||
1262 | "Content-Length: %d\r\n" | |||
1263 | "\r\n" | |||
1264 | "%s", | |||
1265 | code, httperr, tmbuf, RELAYD_SERVERNAME"OpenBSD relayd", bodylen, body) == -1) | |||
1266 | goto done; | |||
1267 | ||||
1268 | /* Dump the message without checking for success */ | |||
1269 | relay_dump(&con->se_in, httpmsg, strlen(httpmsg)); | |||
1270 | free(httpmsg); | |||
1271 | ||||
1272 | done: | |||
1273 | free(body); | |||
1274 | if (asprintf(&httpmsg, "%s (%03d %s)", msg, code, httperr) == -1) | |||
1275 | relay_close(con, msg, 1); | |||
1276 | else { | |||
1277 | relay_close(con, httpmsg, 1); | |||
1278 | free(httpmsg); | |||
1279 | } | |||
1280 | } | |||
1281 | ||||
1282 | void | |||
1283 | relay_close_http(struct rsession *con) | |||
1284 | { | |||
1285 | struct http_session *hs = con->se_priv; | |||
1286 | struct http_method_node *hmn; | |||
1287 | ||||
1288 | DPRINTF("%s: session %d http_session %p", __func__,do {} while(0) | |||
1289 | con->se_id, hs)do {} while(0); | |||
1290 | if (hs != NULL((void *)0)) | |||
1291 | while (!SIMPLEQ_EMPTY(&hs->hs_methods)(((&hs->hs_methods)->sqh_first) == ((void *)0))) { | |||
1292 | hmn = SIMPLEQ_FIRST(&hs->hs_methods)((&hs->hs_methods)->sqh_first); | |||
1293 | SIMPLEQ_REMOVE_HEAD(&hs->hs_methods, hmn_entry)do { if (((&hs->hs_methods)->sqh_first = (&hs-> hs_methods)->sqh_first->hmn_entry.sqe_next) == ((void * )0)) (&hs->hs_methods)->sqh_last = &(&hs-> hs_methods)->sqh_first; } while (0); | |||
1294 | DPRINTF("%s: session %d freeing %s", __func__,do {} while(0) | |||
1295 | con->se_id, relay_httpmethod_byid(hmn->hmn_method))do {} while(0); | |||
1296 | free(hmn); | |||
1297 | } | |||
1298 | relay_httpdesc_free(con->se_in.desc); | |||
1299 | free(con->se_in.desc); | |||
1300 | relay_httpdesc_free(con->se_out.desc); | |||
1301 | free(con->se_out.desc); | |||
1302 | } | |||
1303 | ||||
1304 | char * | |||
1305 | relay_expand_http(struct ctl_relay_event *cre, char *val, char *buf, | |||
1306 | size_t len) | |||
1307 | { | |||
1308 | struct rsession *con = cre->con; | |||
1309 | struct relay *rlay = con->se_relay; | |||
1310 | struct http_descriptor *desc = cre->desc; | |||
1311 | struct kv *host, key; | |||
1312 | char ibuf[128]; | |||
1313 | ||||
1314 | if (strlcpy(buf, val, len) >= len) | |||
1315 | return (NULL((void *)0)); | |||
1316 | ||||
1317 | if (strstr(val, "$HOST") != NULL((void *)0)) { | |||
1318 | key.kv_key = "Host"; | |||
1319 | host = kv_find(&desc->http_headers, &key); | |||
1320 | if (host) { | |||
1321 | if (host->kv_value == NULL((void *)0)) | |||
1322 | return (NULL((void *)0)); | |||
1323 | snprintf(ibuf, sizeof(ibuf), "%s", host->kv_value); | |||
1324 | } else { | |||
1325 | if (print_host(&rlay->rl_conf.ss, | |||
1326 | ibuf, sizeof(ibuf)) == NULL((void *)0)) | |||
1327 | return (NULL((void *)0)); | |||
1328 | } | |||
1329 | if (expand_string(buf, len, "$HOST", ibuf)) | |||
1330 | return (NULL((void *)0)); | |||
1331 | } | |||
1332 | if (strstr(val, "$REMOTE_") != NULL((void *)0)) { | |||
1333 | if (strstr(val, "$REMOTE_ADDR") != NULL((void *)0)) { | |||
1334 | if (print_host(&cre->ss, ibuf, sizeof(ibuf)) == NULL((void *)0)) | |||
1335 | return (NULL((void *)0)); | |||
1336 | if (expand_string(buf, len, | |||
1337 | "$REMOTE_ADDR", ibuf) != 0) | |||
1338 | return (NULL((void *)0)); | |||
1339 | } | |||
1340 | if (strstr(val, "$REMOTE_PORT") != NULL((void *)0)) { | |||
1341 | snprintf(ibuf, sizeof(ibuf), "%u", ntohs(cre->port)(__uint16_t)(__builtin_constant_p(cre->port) ? (__uint16_t )(((__uint16_t)(cre->port) & 0xffU) << 8 | ((__uint16_t )(cre->port) & 0xff00U) >> 8) : __swap16md(cre-> port))); | |||
1342 | if (expand_string(buf, len, | |||
1343 | "$REMOTE_PORT", ibuf) != 0) | |||
1344 | return (NULL((void *)0)); | |||
1345 | } | |||
1346 | } | |||
1347 | if (strstr(val, "$SERVER_") != NULL((void *)0)) { | |||
1348 | if (strstr(val, "$SERVER_ADDR") != NULL((void *)0)) { | |||
1349 | if (print_host(&rlay->rl_conf.ss, | |||
1350 | ibuf, sizeof(ibuf)) == NULL((void *)0)) | |||
1351 | return (NULL((void *)0)); | |||
1352 | if (expand_string(buf, len, | |||
1353 | "$SERVER_ADDR", ibuf) != 0) | |||
1354 | return (NULL((void *)0)); | |||
1355 | } | |||
1356 | if (strstr(val, "$SERVER_PORT") != NULL((void *)0)) { | |||
1357 | snprintf(ibuf, sizeof(ibuf), "%u", | |||
1358 | ntohs(rlay->rl_conf.port)(__uint16_t)(__builtin_constant_p(rlay->rl_conf.port) ? (__uint16_t )(((__uint16_t)(rlay->rl_conf.port) & 0xffU) << 8 | ((__uint16_t)(rlay->rl_conf.port) & 0xff00U) >> 8) : __swap16md(rlay->rl_conf.port))); | |||
1359 | if (expand_string(buf, len, | |||
1360 | "$SERVER_PORT", ibuf) != 0) | |||
1361 | return (NULL((void *)0)); | |||
1362 | } | |||
1363 | if (strstr(val, "$SERVER_NAME") != NULL((void *)0)) { | |||
1364 | if (expand_string(buf, len, | |||
1365 | "$SERVER_NAME", RELAYD_SERVERNAME"OpenBSD relayd") != 0) | |||
1366 | return (NULL((void *)0)); | |||
1367 | } | |||
1368 | } | |||
1369 | if (strstr(val, "$TIMEOUT") != NULL((void *)0)) { | |||
1370 | snprintf(ibuf, sizeof(ibuf), "%lld", | |||
1371 | (long long)rlay->rl_conf.timeout.tv_sec); | |||
1372 | if (expand_string(buf, len, "$TIMEOUT", ibuf) != 0) | |||
1373 | return (NULL((void *)0)); | |||
1374 | } | |||
1375 | ||||
1376 | return (buf); | |||
1377 | } | |||
1378 | ||||
1379 | int | |||
1380 | relay_writerequest_http(struct ctl_relay_event *dst, | |||
1381 | struct ctl_relay_event *cre) | |||
1382 | { | |||
1383 | struct http_descriptor *desc = (struct http_descriptor *)cre->desc; | |||
1384 | const char *name = NULL((void *)0); | |||
1385 | ||||
1386 | if ((name = relay_httpmethod_byid(desc->http_method)) == NULL((void *)0)) | |||
1387 | return (-1); | |||
1388 | ||||
1389 | if (relay_bufferevent_print(dst, name) == -1 || | |||
1390 | relay_bufferevent_print(dst, " ") == -1 || | |||
1391 | relay_bufferevent_print(dst, desc->http_pathhttp_pathquery.kv_key) == -1 || | |||
1392 | (desc->http_queryhttp_pathquery.kv_value != NULL((void *)0) && | |||
1393 | (relay_bufferevent_print(dst, "?") == -1 || | |||
1394 | relay_bufferevent_print(dst, desc->http_queryhttp_pathquery.kv_value) == -1)) || | |||
1395 | relay_bufferevent_print(dst, " ") == -1 || | |||
1396 | relay_bufferevent_print(dst, desc->http_version) == -1) | |||
1397 | return (-1); | |||
1398 | ||||
1399 | return (0); | |||
1400 | } | |||
1401 | ||||
1402 | int | |||
1403 | relay_writeresponse_http(struct ctl_relay_event *dst, | |||
1404 | struct ctl_relay_event *cre) | |||
1405 | { | |||
1406 | struct http_descriptor *desc = (struct http_descriptor *)cre->desc; | |||
1407 | ||||
1408 | DPRINTF("version: %s rescode: %s resmsg: %s", desc->http_version,do {} while(0) | |||
1409 | desc->http_rescode, desc->http_resmesg)do {} while(0); | |||
1410 | ||||
1411 | if (relay_bufferevent_print(dst, desc->http_version) == -1 || | |||
1412 | relay_bufferevent_print(dst, " ") == -1 || | |||
1413 | relay_bufferevent_print(dst, desc->http_rescodehttp_pathquery.kv_key) == -1 || | |||
1414 | relay_bufferevent_print(dst, " ") == -1 || | |||
1415 | relay_bufferevent_print(dst, desc->http_resmesghttp_pathquery.kv_value) == -1) | |||
1416 | return (-1); | |||
1417 | ||||
1418 | return (0); | |||
1419 | } | |||
1420 | ||||
1421 | int | |||
1422 | relay_writeheader_kv(struct ctl_relay_event *dst, struct kv *hdr) | |||
1423 | { | |||
1424 | char *ptr; | |||
1425 | const char *key; | |||
1426 | ||||
1427 | if (hdr->kv_flags & KV_FLAG_INVALID0x02) | |||
1428 | return (0); | |||
1429 | ||||
1430 | /* The key might have been updated in the parent */ | |||
1431 | if (hdr->kv_parent != NULL((void *)0) && hdr->kv_parent->kv_key != NULL((void *)0)) | |||
1432 | key = hdr->kv_parent->kv_key; | |||
1433 | else | |||
1434 | key = hdr->kv_key; | |||
1435 | ||||
1436 | ptr = hdr->kv_value; | |||
1437 | if (relay_bufferevent_print(dst, key) == -1 || | |||
1438 | (ptr != NULL((void *)0) && | |||
1439 | (relay_bufferevent_print(dst, ": ") == -1 || | |||
1440 | relay_bufferevent_print(dst, ptr) == -1 || | |||
1441 | relay_bufferevent_print(dst, "\r\n") == -1))) | |||
1442 | return (-1); | |||
1443 | DPRINTF("%s: %s: %s", __func__, key,do {} while(0) | |||
1444 | hdr->kv_value == NULL ? "" : hdr->kv_value)do {} while(0); | |||
1445 | ||||
1446 | return (0); | |||
1447 | } | |||
1448 | ||||
1449 | int | |||
1450 | relay_writeheader_http(struct ctl_relay_event *dst, struct ctl_relay_event | |||
1451 | *cre) | |||
1452 | { | |||
1453 | struct kv *hdr, *kv; | |||
1454 | struct http_descriptor *desc = (struct http_descriptor *)cre->desc; | |||
1455 | ||||
1456 | RB_FOREACH(hdr, kvtree, &desc->http_headers)for ((hdr) = kvtree_RB_MINMAX(&desc->http_headers, -1) ; (hdr) != ((void *)0); (hdr) = kvtree_RB_NEXT(hdr)) { | |||
1457 | if (relay_writeheader_kv(dst, hdr) == -1) | |||
1458 | return (-1); | |||
1459 | TAILQ_FOREACH(kv, &hdr->kv_children, kv_entry)for((kv) = ((&hdr->kv_children)->tqh_first); (kv) != ((void *)0); (kv) = ((kv)->kv_entry.tqe_next)) { | |||
1460 | if (relay_writeheader_kv(dst, kv) == -1) | |||
1461 | return (-1); | |||
1462 | } | |||
1463 | } | |||
1464 | ||||
1465 | return (0); | |||
1466 | } | |||
1467 | ||||
1468 | enum httpmethod | |||
1469 | relay_httpmethod_byname(const char *name) | |||
1470 | { | |||
1471 | enum httpmethod id = HTTP_METHOD_NONE; | |||
1472 | struct http_method method, *res = NULL((void *)0); | |||
1473 | ||||
1474 | /* Set up key */ | |||
1475 | method.method_name = name; | |||
1476 | ||||
1477 | if ((res = bsearch(&method, http_methods, | |||
1478 | sizeof(http_methods) / sizeof(http_methods[0]) - 1, | |||
1479 | sizeof(http_methods[0]), relay_httpmethod_cmp)) != NULL((void *)0)) | |||
1480 | id = res->method_id; | |||
1481 | ||||
1482 | return (id); | |||
1483 | } | |||
1484 | ||||
1485 | const char * | |||
1486 | relay_httpmethod_byid(u_int id) | |||
1487 | { | |||
1488 | const char *name = NULL((void *)0); | |||
1489 | int i; | |||
1490 | ||||
1491 | for (i = 0; http_methods[i].method_name != NULL((void *)0); i++) { | |||
1492 | if (http_methods[i].method_id == id) { | |||
1493 | name = http_methods[i].method_name; | |||
1494 | break; | |||
1495 | } | |||
1496 | } | |||
1497 | ||||
1498 | return (name); | |||
1499 | } | |||
1500 | ||||
1501 | static int | |||
1502 | relay_httpmethod_cmp(const void *a, const void *b) | |||
1503 | { | |||
1504 | const struct http_method *ma = a; | |||
1505 | const struct http_method *mb = b; | |||
1506 | ||||
1507 | /* | |||
1508 | * RFC 2616 section 5.1.1 says that the method is case | |||
1509 | * sensitive so we don't do a strcasecmp here. | |||
1510 | */ | |||
1511 | return (strcmp(ma->method_name, mb->method_name)); | |||
1512 | } | |||
1513 | ||||
1514 | const char * | |||
1515 | relay_httperror_byid(u_int id) | |||
1516 | { | |||
1517 | struct http_error error, *res = NULL((void *)0); | |||
1518 | ||||
1519 | /* Set up key */ | |||
1520 | error.error_code = (int)id; | |||
1521 | ||||
1522 | res = bsearch(&error, http_errors, | |||
1523 | sizeof(http_errors) / sizeof(http_errors[0]) - 1, | |||
1524 | sizeof(http_errors[0]), relay_httperror_cmp); | |||
1525 | ||||
1526 | return (res->error_name); | |||
1527 | } | |||
1528 | ||||
1529 | static int | |||
1530 | relay_httperror_cmp(const void *a, const void *b) | |||
1531 | { | |||
1532 | const struct http_error *ea = a; | |||
1533 | const struct http_error *eb = b; | |||
1534 | return (ea->error_code - eb->error_code); | |||
1535 | } | |||
1536 | ||||
1537 | int | |||
1538 | relay_httpquery_test(struct ctl_relay_event *cre, struct relay_rule *rule, | |||
1539 | struct kvlist *actions) | |||
1540 | { | |||
1541 | struct http_descriptor *desc = cre->desc; | |||
1542 | struct kv *match = &desc->http_matchquery; | |||
1543 | struct kv *kv = &rule->rule_kv[KEY_TYPE_QUERY]; | |||
1544 | int res = 0; | |||
1545 | ||||
1546 | if (cre->dir == RELAY_DIR_RESPONSE || kv->kv_type != KEY_TYPE_QUERY) | |||
1547 | return (0); | |||
1548 | else if (kv->kv_key == NULL((void *)0)) | |||
1549 | return (0); | |||
1550 | else if ((res = relay_lookup_query(cre, kv)) != 0) | |||
1551 | return (res); | |||
1552 | ||||
1553 | relay_match(actions, kv, match, NULL((void *)0)); | |||
1554 | ||||
1555 | return (0); | |||
1556 | } | |||
1557 | ||||
1558 | int | |||
1559 | relay_httpheader_test(struct ctl_relay_event *cre, struct relay_rule *rule, | |||
1560 | struct kvlist *actions) | |||
1561 | { | |||
1562 | struct http_descriptor *desc = cre->desc; | |||
1563 | struct kv *kv = &rule->rule_kv[KEY_TYPE_HEADER]; | |||
1564 | struct kv *match; | |||
1565 | ||||
1566 | if (kv->kv_type != KEY_TYPE_HEADER) | |||
1567 | return (0); | |||
1568 | ||||
1569 | match = kv_find(&desc->http_headers, kv); | |||
1570 | ||||
1571 | if (kv->kv_option == KEY_OPTION_APPEND || | |||
1572 | kv->kv_option == KEY_OPTION_SET) { | |||
1573 | /* header can be NULL and will be added later */ | |||
1574 | } else if (match == NULL((void *)0)) { | |||
1575 | /* Fail if header doesn't exist */ | |||
1576 | return (-1); | |||
1577 | } else { | |||
1578 | if (fnmatch(kv->kv_key, match->kv_key, | |||
1579 | FNM_CASEFOLD0x10) == FNM_NOMATCH1) | |||
1580 | return (-1); | |||
1581 | if (kv->kv_value != NULL((void *)0) && | |||
1582 | match->kv_value != NULL((void *)0) && | |||
1583 | fnmatch(kv->kv_value, match->kv_value, 0) == FNM_NOMATCH1) | |||
1584 | return (-1); | |||
1585 | } | |||
1586 | ||||
1587 | relay_match(actions, kv, match, &desc->http_headers); | |||
1588 | ||||
1589 | return (0); | |||
1590 | } | |||
1591 | ||||
1592 | int | |||
1593 | relay_httppath_test(struct ctl_relay_event *cre, struct relay_rule *rule, | |||
1594 | struct kvlist *actions) | |||
1595 | { | |||
1596 | struct http_descriptor *desc = cre->desc; | |||
1597 | struct kv *kv = &rule->rule_kv[KEY_TYPE_PATH]; | |||
1598 | struct kv *match = &desc->http_pathquery; | |||
1599 | const char *query; | |||
1600 | ||||
1601 | if (cre->dir == RELAY_DIR_RESPONSE || kv->kv_type != KEY_TYPE_PATH) | |||
1602 | return (0); | |||
1603 | else if (kv->kv_option != KEY_OPTION_STRIP) { | |||
1604 | if (kv->kv_key == NULL((void *)0)) | |||
1605 | return (0); | |||
1606 | else if (fnmatch(kv->kv_key, desc->http_pathhttp_pathquery.kv_key, 0) == FNM_NOMATCH1) | |||
1607 | return (-1); | |||
1608 | else if (kv->kv_value != NULL((void *)0) && kv->kv_option == KEY_OPTION_NONE) { | |||
1609 | query = desc->http_queryhttp_pathquery.kv_value == NULL((void *)0) ? "" : desc->http_queryhttp_pathquery.kv_value; | |||
1610 | if (fnmatch(kv->kv_value, query, FNM_CASEFOLD0x10) == FNM_NOMATCH1) | |||
1611 | return (-1); | |||
1612 | } | |||
1613 | } | |||
1614 | ||||
1615 | relay_match(actions, kv, match, NULL((void *)0)); | |||
1616 | ||||
1617 | return (0); | |||
1618 | } | |||
1619 | ||||
1620 | int | |||
1621 | relay_httpurl_test(struct ctl_relay_event *cre, struct relay_rule *rule, | |||
1622 | struct kvlist *actions) | |||
1623 | { | |||
1624 | struct http_descriptor *desc = cre->desc; | |||
1625 | struct kv *host, key; | |||
1626 | struct kv *kv = &rule->rule_kv[KEY_TYPE_URL]; | |||
1627 | struct kv *match = &desc->http_pathquery; | |||
1628 | int res; | |||
1629 | ||||
1630 | if (cre->dir == RELAY_DIR_RESPONSE || kv->kv_type != KEY_TYPE_URL || | |||
1631 | kv->kv_key == NULL((void *)0)) | |||
1632 | return (0); | |||
1633 | ||||
1634 | key.kv_key = "Host"; | |||
1635 | host = kv_find(&desc->http_headers, &key); | |||
1636 | ||||
1637 | if (host == NULL((void *)0) || host->kv_value == NULL((void *)0)) | |||
1638 | return (0); | |||
1639 | else if (rule->rule_action != RULE_ACTION_BLOCK && | |||
1640 | kv->kv_option == KEY_OPTION_LOG && | |||
1641 | fnmatch(kv->kv_key, match->kv_key, FNM_CASEFOLD0x10) != FNM_NOMATCH1) { | |||
1642 | /* fnmatch url only for logging */ | |||
1643 | } else if ((res = relay_lookup_url(cre, host->kv_value, kv)) != 0) | |||
1644 | return (res); | |||
1645 | relay_match(actions, kv, match, NULL((void *)0)); | |||
1646 | ||||
1647 | return (0); | |||
1648 | } | |||
1649 | ||||
1650 | int | |||
1651 | relay_httpcookie_test(struct ctl_relay_event *cre, struct relay_rule *rule, | |||
1652 | struct kvlist *actions) | |||
1653 | { | |||
1654 | struct http_descriptor *desc = cre->desc; | |||
1655 | struct kv *kv = &rule->rule_kv[KEY_TYPE_COOKIE], key; | |||
1656 | struct kv *match = NULL((void *)0); | |||
1657 | int res; | |||
1658 | ||||
1659 | if (kv->kv_type != KEY_TYPE_COOKIE) | |||
1660 | return (0); | |||
1661 | ||||
1662 | switch (cre->dir) { | |||
1663 | case RELAY_DIR_REQUEST: | |||
1664 | key.kv_key = "Cookie"; | |||
1665 | break; | |||
1666 | case RELAY_DIR_RESPONSE: | |||
1667 | key.kv_key = "Set-Cookie"; | |||
1668 | break; | |||
1669 | default: | |||
1670 | return (0); | |||
1671 | /* NOTREACHED */ | |||
1672 | break; | |||
1673 | } | |||
1674 | ||||
1675 | if (kv->kv_option == KEY_OPTION_APPEND || | |||
1676 | kv->kv_option == KEY_OPTION_SET) { | |||
1677 | /* no cookie, can be NULL and will be added later */ | |||
1678 | } else { | |||
1679 | match = kv_find(&desc->http_headers, &key); | |||
1680 | if (match == NULL((void *)0)) | |||
1681 | return (-1); | |||
1682 | if (kv->kv_key == NULL((void *)0) || match->kv_value == NULL((void *)0)) | |||
1683 | return (0); | |||
1684 | else if ((res = relay_lookup_cookie(cre, match->kv_value, | |||
1685 | kv)) != 0) | |||
1686 | return (res); | |||
1687 | } | |||
1688 | ||||
1689 | relay_match(actions, kv, match, &desc->http_headers); | |||
1690 | ||||
1691 | return (0); | |||
1692 | } | |||
1693 | ||||
1694 | int | |||
1695 | relay_match_actions(struct ctl_relay_event *cre, struct relay_rule *rule, | |||
1696 | struct kvlist *matches, struct kvlist *actions, struct relay_table **tbl) | |||
1697 | { | |||
1698 | struct rsession *con = cre->con; | |||
1699 | struct kv *kv; | |||
1700 | ||||
1701 | /* | |||
1702 | * Apply the following options instantly (action per match). | |||
1703 | */ | |||
1704 | if (rule->rule_table != NULL((void *)0)) { | |||
1705 | *tbl = rule->rule_table; | |||
1706 | con->se_out.ss.ss_family = AF_UNSPEC0; | |||
1707 | } | |||
1708 | if (rule->rule_tag != 0) | |||
1709 | con->se_tag = rule->rule_tag == -1 ? 0 : rule->rule_tag; | |||
1710 | if (rule->rule_label != 0) | |||
1711 | con->se_label = rule->rule_label == -1 ? 0 : rule->rule_label; | |||
1712 | ||||
1713 | /* | |||
1714 | * Apply the remaining options once after evaluation. | |||
1715 | */ | |||
1716 | if (matches == NULL((void *)0)) { | |||
1717 | /* 'pass' or 'block' rule */ | |||
1718 | TAILQ_CONCAT(actions, &rule->rule_kvlist, kv_rule_entry)do { if (!(((&rule->rule_kvlist)->tqh_first) == ((void *)0))) { *(actions)->tqh_last = (&rule->rule_kvlist )->tqh_first; (&rule->rule_kvlist)->tqh_first-> kv_rule_entry.tqe_prev = (actions)->tqh_last; (actions)-> tqh_last = (&rule->rule_kvlist)->tqh_last; do { ((& rule->rule_kvlist))->tqh_first = ((void *)0); ((&rule ->rule_kvlist))->tqh_last = &((&rule->rule_kvlist ))->tqh_first; } while (0); } } while (0); | |||
1719 | } else { | |||
1720 | /* 'match' rule */ | |||
1721 | TAILQ_FOREACH(kv, matches, kv_match_entry)for((kv) = ((matches)->tqh_first); (kv) != ((void *)0); (kv ) = ((kv)->kv_match_entry.tqe_next)) { | |||
1722 | TAILQ_INSERT_TAIL(actions, kv, kv_action_entry)do { (kv)->kv_action_entry.tqe_next = ((void *)0); (kv)-> kv_action_entry.tqe_prev = (actions)->tqh_last; *(actions) ->tqh_last = (kv); (actions)->tqh_last = &(kv)-> kv_action_entry.tqe_next; } while (0); | |||
1723 | } | |||
1724 | } | |||
1725 | ||||
1726 | return (0); | |||
1727 | } | |||
1728 | ||||
1729 | int | |||
1730 | relay_apply_actions(struct ctl_relay_event *cre, struct kvlist *actions, | |||
1731 | struct relay_table *tbl) | |||
1732 | { | |||
1733 | struct rsession *con = cre->con; | |||
1734 | struct http_descriptor *desc = cre->desc; | |||
1735 | struct kv *host = NULL((void *)0); | |||
1736 | const char *value; | |||
1737 | struct kv *kv, *match, *kp, *mp, kvcopy, matchcopy, key; | |||
1738 | int addkv, ret, nstrip; | |||
1739 | char buf[IBUF_READ_SIZE65535], *ptr; | |||
1740 | char *msg = NULL((void *)0); | |||
1741 | const char *meth = NULL((void *)0); | |||
1742 | ||||
1743 | memset(&kvcopy, 0, sizeof(kvcopy)); | |||
1744 | memset(&matchcopy, 0, sizeof(matchcopy)); | |||
1745 | ||||
1746 | ret = -1; | |||
1747 | kp = mp = NULL((void *)0); | |||
1748 | TAILQ_FOREACH(kv, actions, kv_action_entry)for((kv) = ((actions)->tqh_first); (kv) != ((void *)0); (kv ) = ((kv)->kv_action_entry.tqe_next)) { | |||
| ||||
1749 | kp = NULL((void *)0); | |||
1750 | match = kv->kv_match; | |||
1751 | addkv = 0; | |||
1752 | ||||
1753 | /* | |||
1754 | * Although marked as deleted, give a chance to non-critical | |||
1755 | * actions, ie. log, to be performed | |||
1756 | */ | |||
1757 | if (match != NULL((void *)0) && (match->kv_flags & KV_FLAG_INVALID0x02)) | |||
1758 | goto matchdel; | |||
1759 | ||||
1760 | switch (kv->kv_option) { | |||
1761 | case KEY_OPTION_APPEND: | |||
1762 | case KEY_OPTION_SET: | |||
1763 | switch (kv->kv_type) { | |||
1764 | case KEY_TYPE_PATH: | |||
1765 | if (kv->kv_option == KEY_OPTION_APPEND) { | |||
1766 | if (kv_setkey(match, "%s%s", | |||
1767 | match->kv_key, kv->kv_key) == -1) | |||
1768 | goto fail; | |||
1769 | } else { | |||
1770 | if (kv_setkey(match, "%s", | |||
1771 | kv->kv_value) == -1) | |||
1772 | goto fail; | |||
1773 | } | |||
1774 | break; | |||
1775 | case KEY_TYPE_COOKIE: | |||
1776 | kp = &kvcopy; | |||
1777 | if (kv_inherit(kp, kv) == NULL((void *)0)) | |||
1778 | goto fail; | |||
1779 | if (kv_set(kp, "%s=%s;", kp->kv_key, | |||
1780 | kp->kv_value) == -1) | |||
1781 | goto fail; | |||
1782 | if (kv_setkey(kp, "%s", cre->dir == | |||
1783 | RELAY_DIR_REQUEST ? | |||
1784 | "Cookie" : "Set-Cookie") == -1) | |||
1785 | goto fail; | |||
1786 | /* FALLTHROUGH cookie is a header */ | |||
1787 | case KEY_TYPE_HEADER: | |||
1788 | if (match == NULL((void *)0)) { | |||
1789 | addkv = 1; | |||
1790 | break; | |||
1791 | } | |||
1792 | if (match->kv_value == NULL((void *)0) || | |||
1793 | kv->kv_option == KEY_OPTION_SET) { | |||
1794 | if (kv_set(match, "%s", | |||
1795 | kv->kv_value) == -1) | |||
1796 | goto fail; | |||
1797 | } else | |||
1798 | addkv = 1; | |||
1799 | break; | |||
1800 | default: | |||
1801 | /* query, url not supported */ | |||
1802 | break; | |||
1803 | } | |||
1804 | break; | |||
1805 | case KEY_OPTION_REMOVE: | |||
1806 | switch (kv->kv_type) { | |||
1807 | case KEY_TYPE_PATH: | |||
1808 | if (kv_setkey(match, "/") == -1) | |||
1809 | goto fail; | |||
1810 | break; | |||
1811 | case KEY_TYPE_COOKIE: | |||
1812 | case KEY_TYPE_HEADER: | |||
1813 | if (kv->kv_matchtree != NULL((void *)0)) | |||
1814 | match->kv_flags |= KV_FLAG_INVALID0x02; | |||
| ||||
1815 | else | |||
1816 | kv_free(match); | |||
1817 | match = kv->kv_match = NULL((void *)0); | |||
1818 | break; | |||
1819 | default: | |||
1820 | /* query and url not supported */ | |||
1821 | break; | |||
1822 | } | |||
1823 | break; | |||
1824 | case KEY_OPTION_HASH: | |||
1825 | switch (kv->kv_type) { | |||
1826 | case KEY_TYPE_PATH: | |||
1827 | value = match->kv_key; | |||
1828 | break; | |||
1829 | default: | |||
1830 | value = match->kv_value; | |||
1831 | break; | |||
1832 | } | |||
1833 | SipHash24_Update(&con->se_siphashctx,SipHash_Update((&con->se_siphashctx), 2, 4, (value), ( strlen(value))) | |||
1834 | value, strlen(value))SipHash_Update((&con->se_siphashctx), 2, 4, (value), ( strlen(value))); | |||
1835 | break; | |||
1836 | case KEY_OPTION_LOG: | |||
1837 | /* perform this later */ | |||
1838 | break; | |||
1839 | case KEY_OPTION_STRIP: | |||
1840 | nstrip = strtonum(kv->kv_value, 0, INT_MAX0x7fffffff, NULL((void *)0)); | |||
1841 | if (kv->kv_type == KEY_TYPE_PATH) { | |||
1842 | if (kv_setkey(match, "%s", | |||
1843 | server_root_strip(match->kv_key, | |||
1844 | nstrip)) == -1) | |||
1845 | goto fail; | |||
1846 | } | |||
1847 | break; | |||
1848 | default: | |||
1849 | fatalx("%s: invalid action", __func__); | |||
1850 | /* NOTREACHED */ | |||
1851 | } | |||
1852 | ||||
1853 | /* from now on, reads from kp writes to kv */ | |||
1854 | if (kp == NULL((void *)0)) | |||
1855 | kp = kv; | |||
1856 | if (addkv && kv->kv_matchtree != NULL((void *)0)) { | |||
1857 | /* Add new entry to the list (eg. new HTTP header) */ | |||
1858 | if ((match = kv_add(kv->kv_matchtree, kp->kv_key, | |||
1859 | kp->kv_value, 0)) == NULL((void *)0)) | |||
1860 | goto fail; | |||
1861 | match->kv_option = kp->kv_option; | |||
1862 | match->kv_type = kp->kv_type; | |||
1863 | kv->kv_match = match; | |||
1864 | } | |||
1865 | if (match != NULL((void *)0) && kp->kv_flags & KV_FLAG_MACRO0x01) { | |||
1866 | bzero(buf, sizeof(buf)); | |||
1867 | if ((ptr = relay_expand_http(cre, kp->kv_value, buf, | |||
1868 | sizeof(buf))) == NULL((void *)0)) | |||
1869 | goto fail; | |||
1870 | if (kv_set(match, "%s", ptr) == -1) | |||
1871 | goto fail; | |||
1872 | } | |||
1873 | ||||
1874 | matchdel: | |||
1875 | switch (kv->kv_option) { | |||
1876 | case KEY_OPTION_LOG: | |||
1877 | if (match == NULL((void *)0)) | |||
1878 | break; | |||
1879 | mp = &matchcopy; | |||
1880 | if (kv_inherit(mp, match) == NULL((void *)0)) | |||
1881 | goto fail; | |||
1882 | if (mp->kv_flags & KV_FLAG_INVALID0x02) { | |||
1883 | if (kv_set(mp, "%s (removed)", | |||
1884 | mp->kv_value) == -1) | |||
1885 | goto fail; | |||
1886 | } | |||
1887 | switch (kv->kv_type) { | |||
1888 | case KEY_TYPE_URL: | |||
1889 | key.kv_key = "Host"; | |||
1890 | host = kv_find(&desc->http_headers, &key); | |||
1891 | switch (kv->kv_digest) { | |||
1892 | case DIGEST_NONE: | |||
1893 | if (host == NULL((void *)0) || | |||
1894 | host->kv_value == NULL((void *)0)) | |||
1895 | break; | |||
1896 | if (kv_setkey(mp, "%s%s", | |||
1897 | host->kv_value, mp->kv_key) == | |||
1898 | -1) | |||
1899 | goto fail; | |||
1900 | break; | |||
1901 | default: | |||
1902 | if (kv_setkey(mp, "%s", kv->kv_key) | |||
1903 | == -1) | |||
1904 | goto fail; | |||
1905 | break; | |||
1906 | } | |||
1907 | break; | |||
1908 | default: | |||
1909 | break; | |||
1910 | } | |||
1911 | if (kv_log(con, mp, con->se_label, cre->dir) | |||
1912 | == -1) | |||
1913 | goto fail; | |||
1914 | break; | |||
1915 | default: | |||
1916 | break; | |||
1917 | } | |||
1918 | ||||
1919 | /* actions applied, cleanup kv */ | |||
1920 | kv->kv_match = NULL((void *)0); | |||
1921 | kv->kv_matchtree = NULL((void *)0); | |||
1922 | TAILQ_REMOVE(actions, kv, kv_match_entry)do { if (((kv)->kv_match_entry.tqe_next) != ((void *)0)) ( kv)->kv_match_entry.tqe_next->kv_match_entry.tqe_prev = (kv)->kv_match_entry.tqe_prev; else (actions)->tqh_last = (kv)->kv_match_entry.tqe_prev; *(kv)->kv_match_entry .tqe_prev = (kv)->kv_match_entry.tqe_next; ; ; } while (0); | |||
1923 | ||||
1924 | kv_free(&kvcopy); | |||
1925 | kv_free(&matchcopy); | |||
1926 | } | |||
1927 | ||||
1928 | /* | |||
1929 | * Change the backend if the forward table has been changed. | |||
1930 | * This only works in the request direction. | |||
1931 | */ | |||
1932 | if (cre->dir == RELAY_DIR_REQUEST && con->se_table != tbl) { | |||
1933 | relay_reset_event(con, &con->se_out); | |||
1934 | con->se_table = tbl; | |||
1935 | con->se_haslog = 1; | |||
1936 | } | |||
1937 | ||||
1938 | /* | |||
1939 | * log tag for request and response, request method | |||
1940 | * and end of request marker "," | |||
1941 | */ | |||
1942 | if ((con->se_log != NULL((void *)0)) && | |||
1943 | ((meth = relay_httpmethod_byid(desc->http_method)) != NULL((void *)0)) && | |||
1944 | (asprintf(&msg, " %s", meth) != -1)) | |||
1945 | evbuffer_add(con->se_log, msg, strlen(msg)); | |||
1946 | free(msg); | |||
1947 | relay_log(con, cre->dir == RELAY_DIR_REQUEST ? "" : ";"); | |||
1948 | ret = 0; | |||
1949 | fail: | |||
1950 | kv_free(&kvcopy); | |||
1951 | kv_free(&matchcopy); | |||
1952 | ||||
1953 | return (ret); | |||
1954 | } | |||
1955 | ||||
1956 | #define RELAY_GET_SKIP_STEP(i)do { r = r->rule_skip[i]; do {} while(0); } while (0) \ | |||
1957 | do { \ | |||
1958 | r = r->rule_skip[i]; \ | |||
1959 | DPRINTF("%s:%d: skip %d rules", __func__, __LINE__, i)do {} while(0); \ | |||
1960 | } while (0) | |||
1961 | ||||
1962 | #define RELAY_GET_NEXT_STEPdo { do {} while(0); goto nextrule; } while (0) \ | |||
1963 | do { \ | |||
1964 | DPRINTF("%s:%d: next rule", __func__, __LINE__)do {} while(0); \ | |||
1965 | goto nextrule; \ | |||
1966 | } while (0) | |||
1967 | ||||
1968 | int | |||
1969 | relay_test(struct protocol *proto, struct ctl_relay_event *cre) | |||
1970 | { | |||
1971 | struct rsession *con; | |||
1972 | struct http_descriptor *desc = cre->desc; | |||
1973 | struct relay_rule *r = NULL((void *)0), *rule = NULL((void *)0); | |||
1974 | struct relay_table *tbl = NULL((void *)0); | |||
1975 | u_int cnt = 0; | |||
1976 | u_int action = RES_PASS; | |||
1977 | struct kvlist actions, matches; | |||
1978 | struct kv *kv; | |||
1979 | int res = 0; | |||
1980 | ||||
1981 | con = cre->con; | |||
1982 | TAILQ_INIT(&actions)do { (&actions)->tqh_first = ((void *)0); (&actions )->tqh_last = &(&actions)->tqh_first; } while ( 0); | |||
1983 | ||||
1984 | r = TAILQ_FIRST(&proto->rules)((&proto->rules)->tqh_first); | |||
1985 | while (r != NULL((void *)0)) { | |||
1986 | cnt++; | |||
1987 | ||||
1988 | TAILQ_INIT(&matches)do { (&matches)->tqh_first = ((void *)0); (&matches )->tqh_last = &(&matches)->tqh_first; } while ( 0); | |||
1989 | TAILQ_INIT(&r->rule_kvlist)do { (&r->rule_kvlist)->tqh_first = ((void *)0); (& r->rule_kvlist)->tqh_last = &(&r->rule_kvlist )->tqh_first; } while (0); | |||
1990 | ||||
1991 | if (r->rule_dir && r->rule_dir != cre->dir) | |||
1992 | RELAY_GET_SKIP_STEP(RULE_SKIP_DIR)do { r = r->rule_skip[1]; do {} while(0); } while (0); | |||
1993 | else if (proto->type != r->rule_proto) | |||
1994 | RELAY_GET_SKIP_STEP(RULE_SKIP_PROTO)do { r = r->rule_skip[0]; do {} while(0); } while (0); | |||
1995 | else if (RELAY_AF_NEQ(r->rule_af, cre->ss.ss_family)(((r->rule_af) != 0) && ((cre->ss.ss_family) != 0) && ((r->rule_af) != (cre->ss.ss_family))) || | |||
1996 | RELAY_AF_NEQ(r->rule_af, cre->dst->ss.ss_family)(((r->rule_af) != 0) && ((cre->dst->ss.ss_family ) != 0) && ((r->rule_af) != (cre->dst->ss.ss_family )))) | |||
1997 | RELAY_GET_SKIP_STEP(RULE_SKIP_AF)do { r = r->rule_skip[2]; do {} while(0); } while (0); | |||
1998 | else if (RELAY_ADDR_CMP(&r->rule_src, &cre->ss)sockaddr_cmp((struct sockaddr *)&(&r->rule_src)-> addr, (struct sockaddr *)(&cre->ss), (&r->rule_src )->addr_mask) != 0) | |||
1999 | RELAY_GET_SKIP_STEP(RULE_SKIP_SRC)do { r = r->rule_skip[3]; do {} while(0); } while (0); | |||
2000 | else if (RELAY_ADDR_CMP(&r->rule_dst, &con->se_sockname)sockaddr_cmp((struct sockaddr *)&(&r->rule_dst)-> addr, (struct sockaddr *)(&con->se_sockname), (&r-> rule_dst)->addr_mask) != 0) | |||
2001 | RELAY_GET_SKIP_STEP(RULE_SKIP_DST)do { r = r->rule_skip[4]; do {} while(0); } while (0); | |||
2002 | else if (r->rule_method != HTTP_METHOD_NONE && | |||
2003 | (desc->http_method == HTTP_METHOD_RESPONSE || | |||
2004 | desc->http_method != r->rule_method)) | |||
2005 | RELAY_GET_SKIP_STEP(RULE_SKIP_METHOD)do { r = r->rule_skip[5]; do {} while(0); } while (0); | |||
2006 | else if (r->rule_tagged && con->se_tag != r->rule_tagged) | |||
2007 | RELAY_GET_NEXT_STEPdo { do {} while(0); goto nextrule; } while (0); | |||
2008 | else if (relay_httpheader_test(cre, r, &matches) != 0) | |||
2009 | RELAY_GET_NEXT_STEPdo { do {} while(0); goto nextrule; } while (0); | |||
2010 | else if ((res = relay_httpquery_test(cre, r, &matches)) != 0) | |||
2011 | RELAY_GET_NEXT_STEPdo { do {} while(0); goto nextrule; } while (0); | |||
2012 | else if (relay_httppath_test(cre, r, &matches) != 0) | |||
2013 | RELAY_GET_NEXT_STEPdo { do {} while(0); goto nextrule; } while (0); | |||
2014 | else if ((res = relay_httpurl_test(cre, r, &matches)) != 0) | |||
2015 | RELAY_GET_NEXT_STEPdo { do {} while(0); goto nextrule; } while (0); | |||
2016 | else if ((res = relay_httpcookie_test(cre, r, &matches)) != 0) | |||
2017 | RELAY_GET_NEXT_STEPdo { do {} while(0); goto nextrule; } while (0); | |||
2018 | else { | |||
2019 | DPRINTF("%s: session %d: matched rule %d",do {} while(0) | |||
2020 | __func__, con->se_id, r->rule_id)do {} while(0); | |||
2021 | ||||
2022 | if (r->rule_action == RULE_ACTION_MATCH) { | |||
2023 | if (relay_match_actions(cre, r, &matches, | |||
2024 | &actions, &tbl) != 0) { | |||
2025 | /* Something bad happened, drop */ | |||
2026 | action = RES_DROP; | |||
2027 | break; | |||
2028 | } | |||
2029 | RELAY_GET_NEXT_STEPdo { do {} while(0); goto nextrule; } while (0); | |||
2030 | } else if (r->rule_action == RULE_ACTION_BLOCK) | |||
2031 | action = RES_DROP; | |||
2032 | else if (r->rule_action == RULE_ACTION_PASS) | |||
2033 | action = RES_PASS; | |||
2034 | ||||
2035 | /* Rule matched */ | |||
2036 | rule = r; | |||
2037 | ||||
2038 | /* Temporarily save actions */ | |||
2039 | TAILQ_FOREACH(kv, &matches, kv_match_entry)for((kv) = ((&matches)->tqh_first); (kv) != ((void *)0 ); (kv) = ((kv)->kv_match_entry.tqe_next)) { | |||
2040 | TAILQ_INSERT_TAIL(&rule->rule_kvlist,do { (kv)->kv_rule_entry.tqe_next = ((void *)0); (kv)-> kv_rule_entry.tqe_prev = (&rule->rule_kvlist)->tqh_last ; *(&rule->rule_kvlist)->tqh_last = (kv); (&rule ->rule_kvlist)->tqh_last = &(kv)->kv_rule_entry. tqe_next; } while (0) | |||
2041 | kv, kv_rule_entry)do { (kv)->kv_rule_entry.tqe_next = ((void *)0); (kv)-> kv_rule_entry.tqe_prev = (&rule->rule_kvlist)->tqh_last ; *(&rule->rule_kvlist)->tqh_last = (kv); (&rule ->rule_kvlist)->tqh_last = &(kv)->kv_rule_entry. tqe_next; } while (0); | |||
2042 | } | |||
2043 | ||||
2044 | if (rule->rule_flags & RULE_FLAG_QUICK0x01) | |||
2045 | break; | |||
2046 | ||||
2047 | nextrule: | |||
2048 | /* Continue to find last matching policy */ | |||
2049 | DPRINTF("%s: session %d, res %d", __func__,do {} while(0) | |||
2050 | con->se_id, res)do {} while(0); | |||
2051 | if (res == RES_BAD || res == RES_INTERNAL) | |||
2052 | return (res); | |||
2053 | res = 0; | |||
2054 | r = TAILQ_NEXT(r, rule_entry)((r)->rule_entry.tqe_next); | |||
2055 | } | |||
2056 | } | |||
2057 | ||||
2058 | if (rule != NULL((void *)0) && relay_match_actions(cre, rule, NULL((void *)0), &actions, &tbl) | |||
2059 | != 0) { | |||
2060 | /* Something bad happened, drop */ | |||
2061 | action = RES_DROP; | |||
2062 | } | |||
2063 | ||||
2064 | if (relay_apply_actions(cre, &actions, tbl) != 0) { | |||
2065 | /* Something bad happened, drop */ | |||
2066 | action = RES_DROP; | |||
2067 | } | |||
2068 | ||||
2069 | DPRINTF("%s: session %d: action %d", __func__,do {} while(0) | |||
2070 | con->se_id, action)do {} while(0); | |||
2071 | ||||
2072 | return (action); | |||
2073 | } | |||
2074 | ||||
2075 | #define RELAY_SET_SKIP_STEPS(i)do { while (head[i] != cur) { head[i]->rule_skip[i] = cur; head[i] = ((head[i])->rule_entry.tqe_next); } } while (0) \ | |||
2076 | do { \ | |||
2077 | while (head[i] != cur) { \ | |||
2078 | head[i]->rule_skip[i] = cur; \ | |||
2079 | head[i] = TAILQ_NEXT(head[i], rule_entry)((head[i])->rule_entry.tqe_next); \ | |||
2080 | } \ | |||
2081 | } while (0) | |||
2082 | ||||
2083 | /* This code is derived from pf_calc_skip_steps() from pf.c */ | |||
2084 | void | |||
2085 | relay_calc_skip_steps(struct relay_rules *rules) | |||
2086 | { | |||
2087 | struct relay_rule *head[RULE_SKIP_COUNT6], *cur, *prev; | |||
2088 | int i; | |||
2089 | ||||
2090 | cur = TAILQ_FIRST(rules)((rules)->tqh_first); | |||
2091 | prev = cur; | |||
2092 | for (i = 0; i < RULE_SKIP_COUNT6; ++i) | |||
2093 | head[i] = cur; | |||
2094 | while (cur != NULL((void *)0)) { | |||
2095 | if (cur->rule_dir != prev->rule_dir) | |||
2096 | RELAY_SET_SKIP_STEPS(RULE_SKIP_DIR)do { while (head[1] != cur) { head[1]->rule_skip[1] = cur; head[1] = ((head[1])->rule_entry.tqe_next); } } while (0); | |||
2097 | else if (cur->rule_proto != prev->rule_proto) | |||
2098 | RELAY_SET_SKIP_STEPS(RULE_SKIP_PROTO)do { while (head[0] != cur) { head[0]->rule_skip[0] = cur; head[0] = ((head[0])->rule_entry.tqe_next); } } while (0); | |||
2099 | else if (RELAY_AF_NEQ(cur->rule_af, prev->rule_af)(((cur->rule_af) != 0) && ((prev->rule_af) != 0 ) && ((cur->rule_af) != (prev->rule_af)))) | |||
2100 | RELAY_SET_SKIP_STEPS(RULE_SKIP_AF)do { while (head[2] != cur) { head[2]->rule_skip[2] = cur; head[2] = ((head[2])->rule_entry.tqe_next); } } while (0); | |||
2101 | else if (RELAY_ADDR_NEQ(&cur->rule_src, &prev->rule_src)((&cur->rule_src)->addr_mask != (&prev->rule_src )->addr_mask || sockaddr_cmp((struct sockaddr *)&(& cur->rule_src)->addr, (struct sockaddr *)&(&prev ->rule_src)->addr, (&cur->rule_src)->addr_mask ) != 0)) | |||
2102 | RELAY_SET_SKIP_STEPS(RULE_SKIP_SRC)do { while (head[3] != cur) { head[3]->rule_skip[3] = cur; head[3] = ((head[3])->rule_entry.tqe_next); } } while (0); | |||
2103 | else if (RELAY_ADDR_NEQ(&cur->rule_dst, &prev->rule_dst)((&cur->rule_dst)->addr_mask != (&prev->rule_dst )->addr_mask || sockaddr_cmp((struct sockaddr *)&(& cur->rule_dst)->addr, (struct sockaddr *)&(&prev ->rule_dst)->addr, (&cur->rule_dst)->addr_mask ) != 0)) | |||
2104 | RELAY_SET_SKIP_STEPS(RULE_SKIP_DST)do { while (head[4] != cur) { head[4]->rule_skip[4] = cur; head[4] = ((head[4])->rule_entry.tqe_next); } } while (0); | |||
2105 | else if (cur->rule_method != prev->rule_method) | |||
2106 | RELAY_SET_SKIP_STEPS(RULE_SKIP_METHOD)do { while (head[5] != cur) { head[5]->rule_skip[5] = cur; head[5] = ((head[5])->rule_entry.tqe_next); } } while (0); | |||
2107 | ||||
2108 | prev = cur; | |||
2109 | cur = TAILQ_NEXT(cur, rule_entry)((cur)->rule_entry.tqe_next); | |||
2110 | } | |||
2111 | for (i = 0; i < RULE_SKIP_COUNT6; ++i) | |||
2112 | RELAY_SET_SKIP_STEPS(i)do { while (head[i] != cur) { head[i]->rule_skip[i] = cur; head[i] = ((head[i])->rule_entry.tqe_next); } } while (0); | |||
2113 | } | |||
2114 | ||||
2115 | void | |||
2116 | relay_match(struct kvlist *actions, struct kv *kv, struct kv *match, | |||
2117 | struct kvtree *matchtree) | |||
2118 | { | |||
2119 | if (kv->kv_option != KEY_OPTION_NONE) { | |||
2120 | kv->kv_match = match; | |||
2121 | kv->kv_matchtree = matchtree; | |||
2122 | TAILQ_INSERT_TAIL(actions, kv, kv_match_entry)do { (kv)->kv_match_entry.tqe_next = ((void *)0); (kv)-> kv_match_entry.tqe_prev = (actions)->tqh_last; *(actions)-> tqh_last = (kv); (actions)->tqh_last = &(kv)->kv_match_entry .tqe_next; } while (0); | |||
2123 | } | |||
2124 | } | |||
2125 | ||||
2126 | char * | |||
2127 | server_root_strip(char *path, int n) | |||
2128 | { | |||
2129 | char *p; | |||
2130 | ||||
2131 | /* Strip strip leading directories. Leading '/' is ignored. */ | |||
2132 | for (; n > 0 && *path != '\0'; n--) | |||
2133 | if ((p = strchr(++path, '/')) != NULL((void *)0)) | |||
2134 | path = p; | |||
2135 | else | |||
2136 | path--; | |||
2137 | ||||
2138 | return (path); | |||
2139 | } | |||
2140 |