| File: | src/usr.sbin/relayd/relay_http.c |
| Warning: | line 392, column 26 The left operand of '!=' is a garbage value |
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| 1 | /* $OpenBSD: relay_http.c,v 1.83 2021/10/23 20:46:18 benno 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 | void | |||
| 165 | relay_read_http(struct bufferevent *bev, void *arg) | |||
| 166 | { | |||
| 167 | struct ctl_relay_event *cre = arg; | |||
| 168 | struct http_descriptor *desc = cre->desc; | |||
| 169 | struct rsession *con = cre->con; | |||
| 170 | struct relay *rlay = con->se_relay; | |||
| 171 | struct protocol *proto = rlay->rl_proto; | |||
| 172 | struct evbuffer *src = EVBUFFER_INPUT(bev)(bev)->input; | |||
| 173 | char *line = NULL((void*)0), *key, *value; | |||
| 174 | char *urlproto, *host, *path; | |||
| 175 | int action, unique, ret; | |||
| 176 | const char *errstr; | |||
| 177 | size_t size, linelen; | |||
| 178 | struct kv *hdr = NULL((void*)0); | |||
| 179 | struct kv *upgrade = NULL((void*)0), *upgrade_ws = NULL((void*)0); | |||
| 180 | struct kv *connection_close = NULL((void*)0); | |||
| 181 | int ws_response = 0; | |||
| 182 | struct http_method_node *hmn; | |||
| 183 | struct http_session *hs; | |||
| 184 | enum httpmethod request_method; | |||
| ||||
| 185 | ||||
| 186 | getmonotime(&con->se_tv_last); | |||
| 187 | cre->timedout = 0; | |||
| 188 | ||||
| 189 | size = EVBUFFER_LENGTH(src)(src)->off; | |||
| 190 | DPRINTF("%s: session %d: size %lu, to read %lld",do {} while(0) | |||
| 191 | __func__, con->se_id, size, cre->toread)do {} while(0); | |||
| 192 | if (size == 0) { | |||
| 193 | if (cre->dir == RELAY_DIR_RESPONSE) | |||
| 194 | return; | |||
| 195 | cre->toread = TOREAD_HTTP_HEADER; | |||
| 196 | goto done; | |||
| 197 | } | |||
| 198 | ||||
| 199 | while (!cre->done) { | |||
| 200 | line = evbuffer_readln(src, &linelen, EVBUFFER_EOL_CRLF); | |||
| 201 | if (line == NULL((void*)0)) | |||
| 202 | break; | |||
| 203 | ||||
| 204 | /* | |||
| 205 | * An empty line indicates the end of the request. | |||
| 206 | * libevent already stripped the \r\n for us. | |||
| 207 | */ | |||
| 208 | if (linelen == 0) { | |||
| 209 | cre->done = 1; | |||
| 210 | free(line); | |||
| 211 | break; | |||
| 212 | } | |||
| 213 | key = line; | |||
| 214 | ||||
| 215 | /* Limit the total header length minus \r\n */ | |||
| 216 | cre->headerlen += linelen; | |||
| 217 | if (cre->headerlen > proto->httpheaderlen) { | |||
| 218 | free(line); | |||
| 219 | relay_abort_http(con, 413, | |||
| 220 | "request headers too large", 0); | |||
| 221 | return; | |||
| 222 | } | |||
| 223 | ||||
| 224 | /* | |||
| 225 | * The first line is the GET/POST/PUT/... request, | |||
| 226 | * subsequent lines are HTTP headers. | |||
| 227 | */ | |||
| 228 | if (++cre->line == 1) | |||
| 229 | value = strchr(key, ' '); | |||
| 230 | else if (*key == ' ' || *key == '\t') | |||
| 231 | /* Multiline headers wrap with a space or tab */ | |||
| 232 | value = NULL((void*)0); | |||
| 233 | else | |||
| 234 | value = strchr(key, ':'); | |||
| 235 | if (value == NULL((void*)0)) { | |||
| 236 | if (cre->line <= 2) { | |||
| 237 | free(line); | |||
| 238 | relay_abort_http(con, 400, "malformed", 0); | |||
| 239 | return; | |||
| 240 | } | |||
| 241 | ||||
| 242 | /* Append line to the last header, if present */ | |||
| 243 | if (kv_extend(&desc->http_headers, | |||
| 244 | desc->http_lastheader, line) == NULL((void*)0)) { | |||
| 245 | free(line); | |||
| 246 | goto fail; | |||
| 247 | } | |||
| 248 | ||||
| 249 | free(line); | |||
| 250 | continue; | |||
| 251 | } | |||
| 252 | if (*value == ':') { | |||
| 253 | *value++ = '\0'; | |||
| 254 | value += strspn(value, " \t\r\n"); | |||
| 255 | } else { | |||
| 256 | *value++ = '\0'; | |||
| 257 | } | |||
| 258 | ||||
| 259 | DPRINTF("%s: session %d: header '%s: %s'", __func__,do {} while(0) | |||
| 260 | con->se_id, key, value)do {} while(0); | |||
| 261 | ||||
| 262 | hs = con->se_priv; | |||
| 263 | DPRINTF("%s: session %d http_session %p", __func__,do {} while(0) | |||
| 264 | con->se_id, hs)do {} while(0); | |||
| 265 | ||||
| 266 | /* | |||
| 267 | * Identify and handle specific HTTP request methods | |||
| 268 | */ | |||
| 269 | if (cre->line
| |||
| 270 | desc->http_method = HTTP_METHOD_RESPONSE; | |||
| 271 | hmn = SIMPLEQ_FIRST(&hs->hs_methods)((&hs->hs_methods)->sqh_first); | |||
| 272 | ||||
| 273 | /* | |||
| 274 | * There is nothing preventing the relay to send | |||
| 275 | * an unbalanced response. Be prepared. | |||
| 276 | */ | |||
| 277 | if (hmn == NULL((void*)0)) { | |||
| 278 | request_method = HTTP_METHOD_NONE; | |||
| 279 | DPRINTF("%s: session %d unbalanced response",do {} while(0) | |||
| 280 | __func__, con->se_id)do {} while(0); | |||
| 281 | } else { | |||
| 282 | 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); | |||
| 283 | request_method = hmn->hmn_method; | |||
| 284 | DPRINTF("%s: session %d dequeing %s", __func__,do {} while(0) | |||
| 285 | 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(line); | |||
| 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 | if (desc->http_resmesghttp_pathquery.kv_value == NULL((void*)0)) { | |||
| 305 | free(line); | |||
| 306 | goto fail; | |||
| 307 | } | |||
| 308 | *desc->http_resmesghttp_pathquery.kv_value++ = '\0'; | |||
| 309 | if ((desc->http_resmesghttp_pathquery.kv_value = strdup(desc->http_resmesghttp_pathquery.kv_value)) | |||
| 310 | == NULL((void*)0)) { | |||
| 311 | free(line); | |||
| 312 | goto fail; | |||
| 313 | } | |||
| 314 | desc->http_status = strtonum(desc->http_rescodehttp_pathquery.kv_key, 100, | |||
| 315 | 599, &errstr); | |||
| 316 | if (errstr) { | |||
| 317 | DPRINTF("%s: http_status %s: errno %d, %s",do {} while(0) | |||
| 318 | __func__, desc->http_rescode, errno,do {} while(0) | |||
| 319 | errstr)do {} while(0); | |||
| 320 | free(line); | |||
| 321 | goto fail; | |||
| 322 | } | |||
| 323 | DPRINTF("http_version %s http_rescode %s "do {} while(0) | |||
| 324 | "http_resmesg %s", desc->http_version,do {} while(0) | |||
| 325 | desc->http_rescode, desc->http_resmesg)do {} while(0); | |||
| 326 | goto lookup; | |||
| 327 | } else if (cre->line
| |||
| 328 | if ((desc->http_method = relay_httpmethod_byname(key)) | |||
| 329 | == HTTP_METHOD_NONE) { | |||
| 330 | free(line); | |||
| 331 | goto fail; | |||
| 332 | } | |||
| 333 | if ((hmn = calloc(1, sizeof *hmn)) == NULL((void*)0)) { | |||
| 334 | free(line); | |||
| 335 | goto fail; | |||
| 336 | } | |||
| 337 | hmn->hmn_method = desc->http_method; | |||
| 338 | DPRINTF("%s: session %d enqueing %s", __func__,do {} while(0) | |||
| 339 | con->se_id,do {} while(0) | |||
| 340 | relay_httpmethod_byid(hmn->hmn_method))do {} while(0); | |||
| 341 | SIMPLEQ_INSERT_TAIL(&hs->hs_methods, hmn, 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); | |||
| 342 | /* | |||
| 343 | * Decode request path and query | |||
| 344 | */ | |||
| 345 | desc->http_pathhttp_pathquery.kv_key = strdup(value); | |||
| 346 | if (desc->http_pathhttp_pathquery.kv_key == NULL((void*)0)) { | |||
| 347 | free(line); | |||
| 348 | goto fail; | |||
| 349 | } | |||
| 350 | desc->http_version = strchr(desc->http_pathhttp_pathquery.kv_key, ' '); | |||
| 351 | if (desc->http_version == NULL((void*)0)) { | |||
| 352 | free(line); | |||
| 353 | goto fail; | |||
| 354 | } | |||
| 355 | *desc->http_version++ = '\0'; | |||
| 356 | desc->http_queryhttp_pathquery.kv_value = strchr(desc->http_pathhttp_pathquery.kv_key, '?'); | |||
| 357 | if (desc->http_queryhttp_pathquery.kv_value != NULL((void*)0)) | |||
| 358 | *desc->http_queryhttp_pathquery.kv_value++ = '\0'; | |||
| 359 | ||||
| 360 | /* | |||
| 361 | * Have to allocate the strings because they could | |||
| 362 | * be changed independently by the filters later. | |||
| 363 | */ | |||
| 364 | if ((desc->http_version = | |||
| 365 | strdup(desc->http_version)) == NULL((void*)0)) { | |||
| 366 | free(line); | |||
| 367 | goto fail; | |||
| 368 | } | |||
| 369 | if (desc->http_queryhttp_pathquery.kv_value != NULL((void*)0) && | |||
| 370 | (desc->http_queryhttp_pathquery.kv_value = | |||
| 371 | strdup(desc->http_queryhttp_pathquery.kv_value)) == NULL((void*)0)) { | |||
| 372 | free(line); | |||
| 373 | goto fail; | |||
| 374 | } | |||
| 375 | } else if (desc->http_method != HTTP_METHOD_NONE && | |||
| 376 | strcasecmp("Content-Length", key) == 0) { | |||
| 377 | /* | |||
| 378 | * These methods should not have a body | |||
| 379 | * and thus no Content-Length header. | |||
| 380 | */ | |||
| 381 | if (desc->http_method == HTTP_METHOD_TRACE || | |||
| 382 | desc->http_method == HTTP_METHOD_CONNECT) { | |||
| 383 | relay_abort_http(con, 400, "malformed", 0); | |||
| 384 | goto abort; | |||
| 385 | } | |||
| 386 | /* | |||
| 387 | * HEAD responses may provide a Content-Length header, | |||
| 388 | * but if so it should just be ignored, since there is | |||
| 389 | * no actual payload in the response. | |||
| 390 | */ | |||
| 391 | if (desc->http_method != HTTP_METHOD_RESPONSE | |||
| 392 | || request_method != HTTP_METHOD_HEAD) { | |||
| ||||
| 393 | /* | |||
| 394 | * Need to read data from the client after the | |||
| 395 | * HTTP header. | |||
| 396 | * XXX What about non-standard clients not | |||
| 397 | * using the carriage return? And some browsers | |||
| 398 | * seem to include the line length in the | |||
| 399 | * content-length. | |||
| 400 | */ | |||
| 401 | cre->toread = strtonum(value, 0, LLONG_MAX9223372036854775807LL, | |||
| 402 | &errstr); | |||
| 403 | if (errstr) { | |||
| 404 | relay_abort_http(con, 500, errstr, 0); | |||
| 405 | goto abort; | |||
| 406 | } | |||
| 407 | } | |||
| 408 | /* | |||
| 409 | * response with a status code of 1xx | |||
| 410 | * (Informational) or 204 (No Content) MUST | |||
| 411 | * not have a Content-Length (rfc 7230 3.3.3) | |||
| 412 | * Instead we check for value != 0 because there are | |||
| 413 | * servers that do not follow the rfc and send | |||
| 414 | * Content-Length: 0. | |||
| 415 | */ | |||
| 416 | if (desc->http_method == HTTP_METHOD_RESPONSE && ( | |||
| 417 | ((desc->http_status >= 100 && | |||
| 418 | desc->http_status < 200) || | |||
| 419 | desc->http_status == 204)) && | |||
| 420 | cre->toread != 0) { | |||
| 421 | relay_abort_http(con, 502, | |||
| 422 | "Bad Gateway", 0); | |||
| 423 | goto abort; | |||
| 424 | } | |||
| 425 | } | |||
| 426 | lookup: | |||
| 427 | if (strcasecmp("Transfer-Encoding", key) == 0 && | |||
| 428 | strcasecmp("chunked", value) == 0) | |||
| 429 | desc->http_chunked = 1; | |||
| 430 | ||||
| 431 | /* The following header should only occur once */ | |||
| 432 | if (strcasecmp("Host", key) == 0) { | |||
| 433 | unique = 1; | |||
| 434 | ||||
| 435 | /* | |||
| 436 | * The path may contain a URL. The host in the | |||
| 437 | * URL has to match the Host: value. | |||
| 438 | */ | |||
| 439 | if (parse_url(desc->http_pathhttp_pathquery.kv_key, | |||
| 440 | &urlproto, &host, &path) == 0) { | |||
| 441 | ret = strcasecmp(host, value); | |||
| 442 | free(urlproto); | |||
| 443 | free(host); | |||
| 444 | free(path); | |||
| 445 | if (ret != 0) { | |||
| 446 | relay_abort_http(con, 400, | |||
| 447 | "malformed host", 0); | |||
| 448 | goto abort; | |||
| 449 | } | |||
| 450 | } | |||
| 451 | } else | |||
| 452 | unique = 0; | |||
| 453 | ||||
| 454 | if (cre->line != 1) { | |||
| 455 | if ((hdr = kv_add(&desc->http_headers, key, | |||
| 456 | value, unique)) == NULL((void*)0)) { | |||
| 457 | relay_abort_http(con, 400, | |||
| 458 | "malformed header", 0); | |||
| 459 | goto abort; | |||
| 460 | } | |||
| 461 | desc->http_lastheader = hdr; | |||
| 462 | } | |||
| 463 | ||||
| 464 | free(line); | |||
| 465 | } | |||
| 466 | if (cre->done) { | |||
| 467 | if (desc->http_method == HTTP_METHOD_NONE) { | |||
| 468 | relay_abort_http(con, 406, "no method", 0); | |||
| 469 | return; | |||
| 470 | } | |||
| 471 | ||||
| 472 | action = relay_test(proto, cre); | |||
| 473 | switch (action) { | |||
| 474 | case RES_FAIL: | |||
| 475 | relay_close(con, "filter rule failed", 1); | |||
| 476 | return; | |||
| 477 | case RES_BAD: | |||
| 478 | relay_abort_http(con, 400, "Bad Request", | |||
| 479 | con->se_label); | |||
| 480 | return; | |||
| 481 | case RES_INTERNAL: | |||
| 482 | relay_abort_http(con, 500, "Internal Server Error", | |||
| 483 | con->se_label); | |||
| 484 | return; | |||
| 485 | } | |||
| 486 | if (action != RES_PASS) { | |||
| 487 | relay_abort_http(con, 403, "Forbidden", con->se_label); | |||
| 488 | return; | |||
| 489 | } | |||
| 490 | ||||
| 491 | /* | |||
| 492 | * HTTP 101 Switching Protocols | |||
| 493 | */ | |||
| 494 | ||||
| 495 | upgrade = kv_find_value(&desc->http_headers, | |||
| 496 | "Connection", "upgrade", ","); | |||
| 497 | upgrade_ws = kv_find_value(&desc->http_headers, | |||
| 498 | "Upgrade", "websocket", ","); | |||
| 499 | ws_response = 0; | |||
| 500 | if (cre->dir == RELAY_DIR_REQUEST && upgrade_ws != NULL((void*)0)) { | |||
| 501 | if ((proto->httpflags & HTTPFLAG_WEBSOCKETS0x01) == 0) { | |||
| 502 | relay_abort_http(con, 403, | |||
| 503 | "Websocket Forbidden", 0); | |||
| 504 | return; | |||
| 505 | } else if (upgrade == NULL((void*)0)) { | |||
| 506 | relay_abort_http(con, 400, | |||
| 507 | "Bad Websocket Request", 0); | |||
| 508 | return; | |||
| 509 | } else if (desc->http_method != HTTP_METHOD_GET) { | |||
| 510 | relay_abort_http(con, 405, | |||
| 511 | "Websocket Method Not Allowed", 0); | |||
| 512 | return; | |||
| 513 | } | |||
| 514 | } else if (cre->dir == RELAY_DIR_RESPONSE && | |||
| 515 | desc->http_status == 101) { | |||
| 516 | if (upgrade_ws != NULL((void*)0) && upgrade != NULL((void*)0) && | |||
| 517 | (proto->httpflags & HTTPFLAG_WEBSOCKETS0x01)) { | |||
| 518 | ws_response = 1; | |||
| 519 | cre->dst->toread = TOREAD_UNLIMITED; | |||
| 520 | cre->dst->bev->readcb = relay_read; | |||
| 521 | } else { | |||
| 522 | relay_abort_http(con, 502, | |||
| 523 | "Bad Websocket Gateway", 0); | |||
| 524 | return; | |||
| 525 | } | |||
| 526 | } | |||
| 527 | ||||
| 528 | connection_close = kv_find_value(&desc->http_headers, | |||
| 529 | "Connection", "close", ","); | |||
| 530 | ||||
| 531 | switch (desc->http_method) { | |||
| 532 | case HTTP_METHOD_CONNECT: | |||
| 533 | /* Data stream */ | |||
| 534 | cre->toread = TOREAD_UNLIMITED; | |||
| 535 | bev->readcb = relay_read; | |||
| 536 | break; | |||
| 537 | case HTTP_METHOD_GET: | |||
| 538 | case HTTP_METHOD_HEAD: | |||
| 539 | /* WebDAV methods */ | |||
| 540 | case HTTP_METHOD_COPY: | |||
| 541 | case HTTP_METHOD_MOVE: | |||
| 542 | cre->toread = 0; | |||
| 543 | break; | |||
| 544 | case HTTP_METHOD_DELETE: | |||
| 545 | case HTTP_METHOD_OPTIONS: | |||
| 546 | case HTTP_METHOD_POST: | |||
| 547 | case HTTP_METHOD_PUT: | |||
| 548 | case HTTP_METHOD_RESPONSE: | |||
| 549 | /* WebDAV methods */ | |||
| 550 | case HTTP_METHOD_PROPFIND: | |||
| 551 | case HTTP_METHOD_PROPPATCH: | |||
| 552 | case HTTP_METHOD_MKCOL: | |||
| 553 | case HTTP_METHOD_LOCK: | |||
| 554 | case HTTP_METHOD_UNLOCK: | |||
| 555 | case HTTP_METHOD_VERSION_CONTROL: | |||
| 556 | case HTTP_METHOD_REPORT: | |||
| 557 | case HTTP_METHOD_CHECKOUT: | |||
| 558 | case HTTP_METHOD_CHECKIN: | |||
| 559 | case HTTP_METHOD_UNCHECKOUT: | |||
| 560 | case HTTP_METHOD_MKWORKSPACE: | |||
| 561 | case HTTP_METHOD_UPDATE: | |||
| 562 | case HTTP_METHOD_LABEL: | |||
| 563 | case HTTP_METHOD_MERGE: | |||
| 564 | case HTTP_METHOD_BASELINE_CONTROL: | |||
| 565 | case HTTP_METHOD_MKACTIVITY: | |||
| 566 | case HTTP_METHOD_ORDERPATCH: | |||
| 567 | case HTTP_METHOD_ACL: | |||
| 568 | case HTTP_METHOD_MKREDIRECTREF: | |||
| 569 | case HTTP_METHOD_UPDATEREDIRECTREF: | |||
| 570 | case HTTP_METHOD_SEARCH: | |||
| 571 | case HTTP_METHOD_PATCH: | |||
| 572 | /* HTTP request payload */ | |||
| 573 | if (cre->toread > 0) { | |||
| 574 | bev->readcb = relay_read_httpcontent; | |||
| 575 | } | |||
| 576 | ||||
| 577 | /* Single-pass HTTP body */ | |||
| 578 | if (cre->toread < 0) { | |||
| 579 | cre->toread = TOREAD_UNLIMITED; | |||
| 580 | bev->readcb = relay_read; | |||
| 581 | } | |||
| 582 | break; | |||
| 583 | default: | |||
| 584 | /* HTTP handler */ | |||
| 585 | cre->toread = TOREAD_HTTP_HEADER; | |||
| 586 | bev->readcb = relay_read_http; | |||
| 587 | break; | |||
| 588 | } | |||
| 589 | if (desc->http_chunked) { | |||
| 590 | /* Chunked transfer encoding */ | |||
| 591 | cre->toread = TOREAD_HTTP_CHUNK_LENGTH; | |||
| 592 | bev->readcb = relay_read_httpchunks; | |||
| 593 | } | |||
| 594 | ||||
| 595 | /* | |||
| 596 | * Ask the server to close the connection after this request | |||
| 597 | * since we don't read any further request headers. Only add | |||
| 598 | * this header if it does not already exist or if this is a | |||
| 599 | * outbound websocket upgrade response. | |||
| 600 | */ | |||
| 601 | if (cre->toread == TOREAD_UNLIMITED && | |||
| 602 | connection_close == NULL((void*)0) && !ws_response) | |||
| 603 | if (kv_add(&desc->http_headers, "Connection", | |||
| 604 | "close", 0) == NULL((void*)0)) | |||
| 605 | goto fail; | |||
| 606 | ||||
| 607 | if (cre->dir == RELAY_DIR_REQUEST) { | |||
| 608 | if (relay_writerequest_http(cre->dst, cre) == -1) | |||
| 609 | goto fail; | |||
| 610 | } else { | |||
| 611 | if (relay_writeresponse_http(cre->dst, cre) == -1) | |||
| 612 | goto fail; | |||
| 613 | } | |||
| 614 | if (relay_bufferevent_print(cre->dst, "\r\n") == -1 || | |||
| 615 | relay_writeheader_http(cre->dst, cre) == -1 || | |||
| 616 | relay_bufferevent_print(cre->dst, "\r\n") == -1) | |||
| 617 | goto fail; | |||
| 618 | ||||
| 619 | relay_reset_http(cre); | |||
| 620 | done: | |||
| 621 | if (cre->dir == RELAY_DIR_REQUEST && cre->toread <= 0 && | |||
| 622 | cre->dst->state != STATE_CONNECTED) { | |||
| 623 | if (rlay->rl_conf.fwdmode == FWD_TRANS) { | |||
| 624 | relay_bindanyreq(con, 0, IPPROTO_TCP6); | |||
| 625 | return; | |||
| 626 | } | |||
| 627 | if (relay_connect(con) == -1) { | |||
| 628 | relay_abort_http(con, 502, "session failed", 0); | |||
| 629 | return; | |||
| 630 | } | |||
| 631 | } | |||
| 632 | } | |||
| 633 | if (con->se_done) { | |||
| 634 | relay_close(con, "last http read (done)", 0); | |||
| 635 | return; | |||
| 636 | } | |||
| 637 | switch (relay_splice(cre)) { | |||
| 638 | case -1: | |||
| 639 | relay_close(con, strerror(errno(*__errno())), 1); | |||
| 640 | case 1: | |||
| 641 | return; | |||
| 642 | case 0: | |||
| 643 | break; | |||
| 644 | } | |||
| 645 | bufferevent_enable(bev, EV_READ0x02); | |||
| 646 | if (EVBUFFER_LENGTH(src)(src)->off && bev->readcb != relay_read_http) | |||
| 647 | bev->readcb(bev, arg); | |||
| 648 | /* The callback readcb() might have freed the session. */ | |||
| 649 | return; | |||
| 650 | fail: | |||
| 651 | relay_abort_http(con, 500, strerror(errno(*__errno())), 0); | |||
| 652 | return; | |||
| 653 | abort: | |||
| 654 | free(line); | |||
| 655 | } | |||
| 656 | ||||
| 657 | void | |||
| 658 | relay_read_httpcontent(struct bufferevent *bev, void *arg) | |||
| 659 | { | |||
| 660 | struct ctl_relay_event *cre = arg; | |||
| 661 | struct rsession *con = cre->con; | |||
| 662 | struct protocol *proto = con->se_relay->rl_proto; | |||
| 663 | ||||
| 664 | struct evbuffer *src = EVBUFFER_INPUT(bev)(bev)->input; | |||
| 665 | size_t size; | |||
| 666 | ||||
| 667 | getmonotime(&con->se_tv_last); | |||
| 668 | cre->timedout = 0; | |||
| 669 | ||||
| 670 | size = EVBUFFER_LENGTH(src)(src)->off; | |||
| 671 | DPRINTF("%s: session %d: size %lu, to read %lld", __func__,do {} while(0) | |||
| 672 | con->se_id, size, cre->toread)do {} while(0); | |||
| 673 | if (!size) | |||
| 674 | return; | |||
| 675 | if (relay_spliceadjust(cre) == -1) | |||
| 676 | goto fail; | |||
| 677 | ||||
| 678 | if (cre->toread > 0) { | |||
| 679 | /* Read content data */ | |||
| 680 | if ((off_t)size > cre->toread) { | |||
| 681 | size = cre->toread; | |||
| 682 | if (relay_bufferevent_write_chunk(cre->dst, src, size) | |||
| 683 | == -1) | |||
| 684 | goto fail; | |||
| 685 | cre->toread = 0; | |||
| 686 | } else { | |||
| 687 | if (relay_bufferevent_write_buffer(cre->dst, src) == -1) | |||
| 688 | goto fail; | |||
| 689 | cre->toread -= size; | |||
| 690 | } | |||
| 691 | DPRINTF("%s: done, size %lu, to read %lld", __func__,do {} while(0) | |||
| 692 | size, cre->toread)do {} while(0); | |||
| 693 | } | |||
| 694 | if (cre->toread == 0) { | |||
| 695 | cre->toread = TOREAD_HTTP_HEADER; | |||
| 696 | bev->readcb = relay_read_http; | |||
| 697 | } | |||
| 698 | if (con->se_done) | |||
| 699 | goto done; | |||
| 700 | bufferevent_enable(bev, EV_READ0x02); | |||
| 701 | ||||
| 702 | if (cre->dst->bev && EVBUFFER_LENGTH(EVBUFFER_OUTPUT(cre->dst->bev))((cre->dst->bev)->output)->off > | |||
| 703 | (size_t)RELAY_MAX_PREFETCH256 * proto->tcpbufsiz) | |||
| 704 | bufferevent_disable(cre->bev, EV_READ0x02); | |||
| 705 | ||||
| 706 | if (bev->readcb != relay_read_httpcontent) | |||
| 707 | bev->readcb(bev, arg); | |||
| 708 | /* The callback readcb() might have freed the session. */ | |||
| 709 | return; | |||
| 710 | done: | |||
| 711 | relay_close(con, "last http content read", 0); | |||
| 712 | return; | |||
| 713 | fail: | |||
| 714 | relay_close(con, strerror(errno(*__errno())), 1); | |||
| 715 | } | |||
| 716 | ||||
| 717 | void | |||
| 718 | relay_read_httpchunks(struct bufferevent *bev, void *arg) | |||
| 719 | { | |||
| 720 | struct ctl_relay_event *cre = arg; | |||
| 721 | struct rsession *con = cre->con; | |||
| 722 | struct protocol *proto = con->se_relay->rl_proto; | |||
| 723 | struct evbuffer *src = EVBUFFER_INPUT(bev)(bev)->input; | |||
| 724 | char *line; | |||
| 725 | long long llval; | |||
| 726 | size_t size, linelen; | |||
| 727 | ||||
| 728 | getmonotime(&con->se_tv_last); | |||
| 729 | cre->timedout = 0; | |||
| 730 | ||||
| 731 | size = EVBUFFER_LENGTH(src)(src)->off; | |||
| 732 | DPRINTF("%s: session %d: size %lu, to read %lld", __func__,do {} while(0) | |||
| 733 | con->se_id, size, cre->toread)do {} while(0); | |||
| 734 | if (!size) | |||
| 735 | return; | |||
| 736 | if (relay_spliceadjust(cre) == -1) | |||
| 737 | goto fail; | |||
| 738 | ||||
| 739 | if (cre->toread > 0) { | |||
| 740 | /* Read chunk data */ | |||
| 741 | if ((off_t)size > cre->toread) { | |||
| 742 | size = cre->toread; | |||
| 743 | if (relay_bufferevent_write_chunk(cre->dst, src, size) | |||
| 744 | == -1) | |||
| 745 | goto fail; | |||
| 746 | cre->toread = 0; | |||
| 747 | } else { | |||
| 748 | if (relay_bufferevent_write_buffer(cre->dst, src) == -1) | |||
| 749 | goto fail; | |||
| 750 | cre->toread -= size; | |||
| 751 | } | |||
| 752 | DPRINTF("%s: done, size %lu, to read %lld", __func__,do {} while(0) | |||
| 753 | size, cre->toread)do {} while(0); | |||
| 754 | } | |||
| 755 | switch (cre->toread) { | |||
| 756 | case TOREAD_HTTP_CHUNK_LENGTH: | |||
| 757 | line = evbuffer_readln(src, &linelen, EVBUFFER_EOL_CRLF); | |||
| 758 | if (line == NULL((void*)0)) { | |||
| 759 | /* Ignore empty line, continue */ | |||
| 760 | bufferevent_enable(bev, EV_READ0x02); | |||
| 761 | return; | |||
| 762 | } | |||
| 763 | if (linelen == 0) { | |||
| 764 | free(line); | |||
| 765 | goto next; | |||
| 766 | } | |||
| 767 | ||||
| 768 | /* | |||
| 769 | * Read prepended chunk size in hex, ignore the trailer. | |||
| 770 | * The returned signed value must not be negative. | |||
| 771 | */ | |||
| 772 | if (sscanf(line, "%llx", &llval) != 1 || llval < 0) { | |||
| 773 | free(line); | |||
| 774 | relay_close(con, "invalid chunk size", 1); | |||
| 775 | return; | |||
| 776 | } | |||
| 777 | ||||
| 778 | if (relay_bufferevent_print(cre->dst, line) == -1 || | |||
| 779 | relay_bufferevent_print(cre->dst, "\r\n") == -1) { | |||
| 780 | free(line); | |||
| 781 | goto fail; | |||
| 782 | } | |||
| 783 | free(line); | |||
| 784 | ||||
| 785 | if ((cre->toread = llval) == 0) { | |||
| 786 | DPRINTF("%s: last chunk", __func__)do {} while(0); | |||
| 787 | cre->toread = TOREAD_HTTP_CHUNK_TRAILER; | |||
| 788 | } | |||
| 789 | break; | |||
| 790 | case TOREAD_HTTP_CHUNK_TRAILER: | |||
| 791 | /* Last chunk is 0 bytes followed by trailer and empty line */ | |||
| 792 | line = evbuffer_readln(src, &linelen, EVBUFFER_EOL_CRLF); | |||
| 793 | if (line == NULL((void*)0)) { | |||
| 794 | /* Ignore empty line, continue */ | |||
| 795 | bufferevent_enable(bev, EV_READ0x02); | |||
| 796 | return; | |||
| 797 | } | |||
| 798 | if (relay_bufferevent_print(cre->dst, line) == -1 || | |||
| 799 | relay_bufferevent_print(cre->dst, "\r\n") == -1) { | |||
| 800 | free(line); | |||
| 801 | goto fail; | |||
| 802 | } | |||
| 803 | if (linelen == 0) { | |||
| 804 | /* Switch to HTTP header mode */ | |||
| 805 | cre->toread = TOREAD_HTTP_HEADER; | |||
| 806 | bev->readcb = relay_read_http; | |||
| 807 | } | |||
| 808 | free(line); | |||
| 809 | break; | |||
| 810 | case 0: | |||
| 811 | /* Chunk is terminated by an empty newline */ | |||
| 812 | line = evbuffer_readln(src, &linelen, EVBUFFER_EOL_CRLF); | |||
| 813 | free(line); | |||
| 814 | if (relay_bufferevent_print(cre->dst, "\r\n") == -1) | |||
| 815 | goto fail; | |||
| 816 | cre->toread = TOREAD_HTTP_CHUNK_LENGTH; | |||
| 817 | break; | |||
| 818 | } | |||
| 819 | ||||
| 820 | next: | |||
| 821 | if (con->se_done) | |||
| 822 | goto done; | |||
| 823 | bufferevent_enable(bev, EV_READ0x02); | |||
| 824 | ||||
| 825 | if (cre->dst->bev && EVBUFFER_LENGTH(EVBUFFER_OUTPUT(cre->dst->bev))((cre->dst->bev)->output)->off > | |||
| 826 | (size_t)RELAY_MAX_PREFETCH256 * proto->tcpbufsiz) | |||
| 827 | bufferevent_disable(cre->bev, EV_READ0x02); | |||
| 828 | ||||
| 829 | if (EVBUFFER_LENGTH(src)(src)->off) | |||
| 830 | bev->readcb(bev, arg); | |||
| 831 | /* The callback readcb() might have freed the session. */ | |||
| 832 | return; | |||
| 833 | ||||
| 834 | done: | |||
| 835 | relay_close(con, "last http chunk read (done)", 0); | |||
| 836 | return; | |||
| 837 | fail: | |||
| 838 | relay_close(con, strerror(errno(*__errno())), 1); | |||
| 839 | } | |||
| 840 | ||||
| 841 | void | |||
| 842 | relay_reset_http(struct ctl_relay_event *cre) | |||
| 843 | { | |||
| 844 | struct http_descriptor *desc = cre->desc; | |||
| 845 | ||||
| 846 | relay_httpdesc_free(desc); | |||
| 847 | desc->http_method = 0; | |||
| 848 | desc->http_chunked = 0; | |||
| 849 | cre->headerlen = 0; | |||
| 850 | cre->line = 0; | |||
| 851 | cre->done = 0; | |||
| 852 | } | |||
| 853 | ||||
| 854 | static int | |||
| 855 | _relay_lookup_url(struct ctl_relay_event *cre, char *host, char *path, | |||
| 856 | char *query, struct kv *kv) | |||
| 857 | { | |||
| 858 | struct rsession *con = cre->con; | |||
| 859 | char *val, *md = NULL((void*)0); | |||
| 860 | int ret = RES_FAIL; | |||
| 861 | const char *str = NULL((void*)0); | |||
| 862 | ||||
| 863 | if (asprintf(&val, "%s%s%s%s", | |||
| 864 | host, path, | |||
| 865 | query == NULL((void*)0) ? "" : "?", | |||
| 866 | query == NULL((void*)0) ? "" : query) == -1) { | |||
| 867 | relay_abort_http(con, 500, "failed to allocate URL", 0); | |||
| 868 | return (RES_FAIL); | |||
| 869 | } | |||
| 870 | ||||
| 871 | switch (kv->kv_digest) { | |||
| 872 | case DIGEST_SHA1: | |||
| 873 | case DIGEST_MD5: | |||
| 874 | if ((md = digeststr(kv->kv_digest, | |||
| 875 | val, strlen(val), NULL((void*)0))) == NULL((void*)0)) { | |||
| 876 | relay_abort_http(con, 500, | |||
| 877 | "failed to allocate digest", 0); | |||
| 878 | goto fail; | |||
| 879 | } | |||
| 880 | str = md; | |||
| 881 | break; | |||
| 882 | case DIGEST_NONE: | |||
| 883 | str = val; | |||
| 884 | break; | |||
| 885 | } | |||
| 886 | ||||
| 887 | DPRINTF("%s: session %d: %s, %s: %d", __func__, con->se_id,do {} while(0) | |||
| 888 | str, kv->kv_key, strcasecmp(kv->kv_key, str))do {} while(0); | |||
| 889 | ||||
| 890 | if (strcasecmp(kv->kv_key, str) == 0) { | |||
| 891 | ret = RES_DROP; | |||
| 892 | goto fail; | |||
| 893 | } | |||
| 894 | ||||
| 895 | ret = RES_PASS; | |||
| 896 | fail: | |||
| 897 | free(md); | |||
| 898 | free(val); | |||
| 899 | return (ret); | |||
| 900 | } | |||
| 901 | ||||
| 902 | int | |||
| 903 | relay_lookup_url(struct ctl_relay_event *cre, const char *host, struct kv *kv) | |||
| 904 | { | |||
| 905 | struct http_descriptor *desc = (struct http_descriptor *)cre->desc; | |||
| 906 | int i, j, dots; | |||
| 907 | char *hi[RELAY_MAXLOOKUPLEVELS5], *p, *pp, *c, ch; | |||
| 908 | char ph[HOST_NAME_MAX255+1]; | |||
| 909 | int ret; | |||
| 910 | ||||
| 911 | if (desc->http_pathhttp_pathquery.kv_key == NULL((void*)0)) | |||
| 912 | return (RES_PASS); | |||
| 913 | ||||
| 914 | /* | |||
| 915 | * This is an URL lookup algorithm inspired by | |||
| 916 | * http://code.google.com/apis/safebrowsing/ | |||
| 917 | * developers_guide.html#PerformingLookups | |||
| 918 | */ | |||
| 919 | ||||
| 920 | DPRINTF("%s: host '%s', path '%s', query '%s'",do {} while(0) | |||
| 921 | __func__, host, desc->http_path,do {} while(0) | |||
| 922 | desc->http_query == NULL ? "" : desc->http_query)do {} while(0); | |||
| 923 | ||||
| 924 | if (canonicalize_host(host, ph, sizeof(ph)) == NULL((void*)0)) { | |||
| 925 | return (RES_BAD); | |||
| 926 | } | |||
| 927 | ||||
| 928 | bzero(hi, sizeof(hi)); | |||
| 929 | for (dots = -1, i = strlen(ph) - 1; i > 0; i--) { | |||
| 930 | if (ph[i] == '.' && ++dots) | |||
| 931 | hi[dots - 1] = &ph[i + 1]; | |||
| 932 | if (dots > (RELAY_MAXLOOKUPLEVELS5 - 2)) | |||
| 933 | break; | |||
| 934 | } | |||
| 935 | if (dots == -1) | |||
| 936 | dots = 0; | |||
| 937 | hi[dots] = ph; | |||
| 938 | ||||
| 939 | if ((pp = strdup(desc->http_pathhttp_pathquery.kv_key)) == NULL((void*)0)) { | |||
| 940 | return (RES_INTERNAL); | |||
| 941 | } | |||
| 942 | for (i = (RELAY_MAXLOOKUPLEVELS5 - 1); i >= 0; i--) { | |||
| 943 | if (hi[i] == NULL((void*)0)) | |||
| 944 | continue; | |||
| 945 | ||||
| 946 | /* 1. complete path with query */ | |||
| 947 | if (desc->http_queryhttp_pathquery.kv_value != NULL((void*)0)) | |||
| 948 | if ((ret = _relay_lookup_url(cre, hi[i], | |||
| 949 | pp, desc->http_queryhttp_pathquery.kv_value, kv)) != RES_PASS) | |||
| 950 | goto done; | |||
| 951 | ||||
| 952 | /* 2. complete path without query */ | |||
| 953 | if ((ret = _relay_lookup_url(cre, hi[i], | |||
| 954 | pp, NULL((void*)0), kv)) != RES_PASS) | |||
| 955 | goto done; | |||
| 956 | ||||
| 957 | /* 3. traverse path */ | |||
| 958 | for (j = 0, p = strchr(pp, '/'); | |||
| 959 | p != NULL((void*)0); p = strchr(p, '/'), j++) { | |||
| 960 | if (j > (RELAY_MAXLOOKUPLEVELS5 - 2) || *(++p) == '\0') | |||
| 961 | break; | |||
| 962 | c = &pp[p - pp]; | |||
| 963 | ch = *c; | |||
| 964 | *c = '\0'; | |||
| 965 | if ((ret = _relay_lookup_url(cre, hi[i], | |||
| 966 | pp, NULL((void*)0), kv)) != RES_PASS) | |||
| 967 | goto done; | |||
| 968 | *c = ch; | |||
| 969 | } | |||
| 970 | } | |||
| 971 | ||||
| 972 | ret = RES_PASS; | |||
| 973 | done: | |||
| 974 | free(pp); | |||
| 975 | return (ret); | |||
| 976 | } | |||
| 977 | ||||
| 978 | int | |||
| 979 | relay_lookup_cookie(struct ctl_relay_event *cre, const char *str, | |||
| 980 | struct kv *kv) | |||
| 981 | { | |||
| 982 | char *val, *ptr, *key, *value; | |||
| 983 | int ret; | |||
| 984 | ||||
| 985 | if ((val = strdup(str)) == NULL((void*)0)) { | |||
| 986 | return (RES_INTERNAL); | |||
| 987 | } | |||
| 988 | ||||
| 989 | for (ptr = val; ptr != NULL((void*)0) && strlen(ptr);) { | |||
| 990 | if (*ptr == ' ') | |||
| 991 | *ptr++ = '\0'; | |||
| 992 | key = ptr; | |||
| 993 | if ((ptr = strchr(ptr, ';')) != NULL((void*)0)) | |||
| 994 | *ptr++ = '\0'; | |||
| 995 | /* | |||
| 996 | * XXX We do not handle attributes | |||
| 997 | * ($Path, $Domain, or $Port) | |||
| 998 | */ | |||
| 999 | if (*key == '$') | |||
| 1000 | continue; | |||
| 1001 | ||||
| 1002 | if ((value = | |||
| 1003 | strchr(key, '=')) == NULL((void*)0) || | |||
| 1004 | strlen(value) < 1) | |||
| 1005 | continue; | |||
| 1006 | *value++ = '\0'; | |||
| 1007 | if (*value == '"') | |||
| 1008 | *value++ = '\0'; | |||
| 1009 | if (value[strlen(value) - 1] == '"') | |||
| 1010 | value[strlen(value) - 1] = '\0'; | |||
| 1011 | ||||
| 1012 | DPRINTF("%s: key %s = %s, %s = %s : %d",do {} while(0) | |||
| 1013 | __func__, key, value, kv->kv_key, kv->kv_value,do {} while(0) | |||
| 1014 | strcasecmp(kv->kv_key, key))do {} while(0); | |||
| 1015 | ||||
| 1016 | if (strcasecmp(kv->kv_key, key) == 0 && | |||
| 1017 | ((kv->kv_value == NULL((void*)0)) || | |||
| 1018 | (fnmatch(kv->kv_value, value, | |||
| 1019 | FNM_CASEFOLD0x10) != FNM_NOMATCH1))) { | |||
| 1020 | ret = RES_DROP; | |||
| 1021 | goto done; | |||
| 1022 | } | |||
| 1023 | } | |||
| 1024 | ||||
| 1025 | ret = RES_PASS; | |||
| 1026 | ||||
| 1027 | done: | |||
| 1028 | free(val); | |||
| 1029 | return (ret); | |||
| 1030 | } | |||
| 1031 | ||||
| 1032 | int | |||
| 1033 | relay_lookup_query(struct ctl_relay_event *cre, struct kv *kv) | |||
| 1034 | { | |||
| 1035 | struct http_descriptor *desc = cre->desc; | |||
| 1036 | struct kv *match = &desc->http_matchquery; | |||
| 1037 | char *val, *ptr, *tmpkey = NULL((void*)0), *tmpval = NULL((void*)0); | |||
| 1038 | int ret = -1; | |||
| 1039 | ||||
| 1040 | if (desc->http_queryhttp_pathquery.kv_value == NULL((void*)0)) | |||
| 1041 | return (-1); | |||
| 1042 | if ((val = strdup(desc->http_queryhttp_pathquery.kv_value)) == NULL((void*)0)) { | |||
| 1043 | return (RES_INTERNAL); | |||
| 1044 | } | |||
| 1045 | ||||
| 1046 | ptr = val; | |||
| 1047 | while (ptr != NULL((void*)0) && strlen(ptr)) { | |||
| 1048 | tmpkey = ptr; | |||
| 1049 | if ((ptr = strchr(ptr, '&')) != NULL((void*)0)) | |||
| 1050 | *ptr++ = '\0'; | |||
| 1051 | if ((tmpval = strchr(tmpkey, '=')) == NULL((void*)0) || strlen(tmpval) | |||
| 1052 | < 1) | |||
| 1053 | continue; | |||
| 1054 | *tmpval++ = '\0'; | |||
| 1055 | ||||
| 1056 | if (fnmatch(kv->kv_key, tmpkey, 0) != FNM_NOMATCH1 && | |||
| 1057 | (kv->kv_value == NULL((void*)0) || fnmatch(kv->kv_value, tmpval, 0) | |||
| 1058 | != FNM_NOMATCH1)) | |||
| 1059 | break; | |||
| 1060 | else | |||
| 1061 | tmpkey = NULL((void*)0); | |||
| 1062 | } | |||
| 1063 | ||||
| 1064 | if (tmpkey == NULL((void*)0) || tmpval == NULL((void*)0)) | |||
| 1065 | goto done; | |||
| 1066 | ||||
| 1067 | match->kv_key = strdup(tmpkey); | |||
| 1068 | if (match->kv_key == NULL((void*)0)) | |||
| 1069 | goto done; | |||
| 1070 | match->kv_value = strdup(tmpval); | |||
| 1071 | if (match->kv_key == NULL((void*)0)) | |||
| 1072 | goto done; | |||
| 1073 | ret = 0; | |||
| 1074 | ||||
| 1075 | done: | |||
| 1076 | free(val); | |||
| 1077 | return (ret); | |||
| 1078 | } | |||
| 1079 | ||||
| 1080 | ssize_t | |||
| 1081 | relay_http_time(time_t t, char *tmbuf, size_t len) | |||
| 1082 | { | |||
| 1083 | struct tm tm; | |||
| 1084 | ||||
| 1085 | /* New HTTP/1.1 RFC 7231 prefers IMF-fixdate from RFC 5322 */ | |||
| 1086 | if (t == -1 || gmtime_r(&t, &tm) == NULL((void*)0)) | |||
| 1087 | return (-1); | |||
| 1088 | else | |||
| 1089 | return (strftime(tmbuf, len, "%a, %d %h %Y %T %Z", &tm)); | |||
| 1090 | } | |||
| 1091 | ||||
| 1092 | void | |||
| 1093 | relay_abort_http(struct rsession *con, u_int code, const char *msg, | |||
| 1094 | u_int16_t labelid) | |||
| 1095 | { | |||
| 1096 | struct relay *rlay = con->se_relay; | |||
| 1097 | struct bufferevent *bev = con->se_in.bev; | |||
| 1098 | const char *httperr = NULL((void*)0), *text = ""; | |||
| 1099 | char *httpmsg, *body = NULL((void*)0); | |||
| 1100 | char tmbuf[32], hbuf[128]; | |||
| 1101 | const char *style, *label = NULL((void*)0); | |||
| 1102 | int bodylen; | |||
| 1103 | ||||
| 1104 | if ((httperr = relay_httperror_byid(code)) == NULL((void*)0)) | |||
| 1105 | httperr = "Unknown Error"; | |||
| 1106 | ||||
| 1107 | if (labelid != 0) | |||
| 1108 | label = label_id2name(labelid); | |||
| 1109 | ||||
| 1110 | /* In some cases this function may be called from generic places */ | |||
| 1111 | if (rlay->rl_proto->type != RELAY_PROTO_HTTP || | |||
| 1112 | (rlay->rl_proto->flags & F_RETURN0x00020000) == 0) { | |||
| 1113 | relay_close(con, msg, 0); | |||
| 1114 | return; | |||
| 1115 | } | |||
| 1116 | ||||
| 1117 | if (bev == NULL((void*)0)) | |||
| 1118 | goto done; | |||
| 1119 | ||||
| 1120 | /* Some system information */ | |||
| 1121 | if (print_host(&rlay->rl_conf.ss, hbuf, sizeof(hbuf)) == NULL((void*)0)) | |||
| 1122 | goto done; | |||
| 1123 | ||||
| 1124 | if (relay_http_time(time(NULL((void*)0)), tmbuf, sizeof(tmbuf)) <= 0) | |||
| 1125 | goto done; | |||
| 1126 | ||||
| 1127 | /* Do not send details of the Internal Server Error */ | |||
| 1128 | switch (code) { | |||
| 1129 | case 500: | |||
| 1130 | break; | |||
| 1131 | default: | |||
| 1132 | text = msg; | |||
| 1133 | break; | |||
| 1134 | } | |||
| 1135 | ||||
| 1136 | /* A CSS stylesheet allows minimal customization by the user */ | |||
| 1137 | style = (rlay->rl_proto->style != NULL((void*)0)) ? rlay->rl_proto->style : | |||
| 1138 | "body { background-color: #a00000; color: white; font-family: " | |||
| 1139 | "'Comic Sans MS', 'Chalkboard SE', 'Comic Neue', sans-serif; }\n" | |||
| 1140 | "hr { border: 0; border-bottom: 1px dashed; }\n"; | |||
| 1141 | ||||
| 1142 | /* Generate simple HTTP+HTML error document */ | |||
| 1143 | if ((bodylen = asprintf(&body, | |||
| 1144 | "<!DOCTYPE html>\n" | |||
| 1145 | "<html>\n" | |||
| 1146 | "<head>\n" | |||
| 1147 | "<title>%03d %s</title>\n" | |||
| 1148 | "<style type=\"text/css\"><!--\n%s\n--></style>\n" | |||
| 1149 | "</head>\n" | |||
| 1150 | "<body>\n" | |||
| 1151 | "<h1>%s</h1>\n" | |||
| 1152 | "<div id='m'>%s</div>\n" | |||
| 1153 | "<div id='l'>%s</div>\n" | |||
| 1154 | "<hr><address>%s at %s port %d</address>\n" | |||
| 1155 | "</body>\n" | |||
| 1156 | "</html>\n", | |||
| 1157 | code, httperr, style, httperr, text, | |||
| 1158 | label == NULL((void*)0) ? "" : label, | |||
| 1159 | 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) | |||
| 1160 | goto done; | |||
| 1161 | ||||
| 1162 | /* Generate simple HTTP+HTML error document */ | |||
| 1163 | if (asprintf(&httpmsg, | |||
| 1164 | "HTTP/1.0 %03d %s\r\n" | |||
| 1165 | "Date: %s\r\n" | |||
| 1166 | "Server: %s\r\n" | |||
| 1167 | "Connection: close\r\n" | |||
| 1168 | "Content-Type: text/html\r\n" | |||
| 1169 | "Content-Length: %d\r\n" | |||
| 1170 | "\r\n" | |||
| 1171 | "%s", | |||
| 1172 | code, httperr, tmbuf, RELAYD_SERVERNAME"OpenBSD relayd", bodylen, body) == -1) | |||
| 1173 | goto done; | |||
| 1174 | ||||
| 1175 | /* Dump the message without checking for success */ | |||
| 1176 | relay_dump(&con->se_in, httpmsg, strlen(httpmsg)); | |||
| 1177 | free(httpmsg); | |||
| 1178 | ||||
| 1179 | done: | |||
| 1180 | free(body); | |||
| 1181 | if (asprintf(&httpmsg, "%s (%03d %s)", msg, code, httperr) == -1) | |||
| 1182 | relay_close(con, msg, 1); | |||
| 1183 | else { | |||
| 1184 | relay_close(con, httpmsg, 1); | |||
| 1185 | free(httpmsg); | |||
| 1186 | } | |||
| 1187 | } | |||
| 1188 | ||||
| 1189 | void | |||
| 1190 | relay_close_http(struct rsession *con) | |||
| 1191 | { | |||
| 1192 | struct http_session *hs = con->se_priv; | |||
| 1193 | struct http_method_node *hmn; | |||
| 1194 | ||||
| 1195 | DPRINTF("%s: session %d http_session %p", __func__,do {} while(0) | |||
| 1196 | con->se_id, hs)do {} while(0); | |||
| 1197 | if (hs != NULL((void*)0)) | |||
| 1198 | while (!SIMPLEQ_EMPTY(&hs->hs_methods)(((&hs->hs_methods)->sqh_first) == ((void*)0))) { | |||
| 1199 | hmn = SIMPLEQ_FIRST(&hs->hs_methods)((&hs->hs_methods)->sqh_first); | |||
| 1200 | 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); | |||
| 1201 | DPRINTF("%s: session %d freeing %s", __func__,do {} while(0) | |||
| 1202 | con->se_id, relay_httpmethod_byid(hmn->hmn_method))do {} while(0); | |||
| 1203 | free(hmn); | |||
| 1204 | } | |||
| 1205 | relay_httpdesc_free(con->se_in.desc); | |||
| 1206 | free(con->se_in.desc); | |||
| 1207 | relay_httpdesc_free(con->se_out.desc); | |||
| 1208 | free(con->se_out.desc); | |||
| 1209 | } | |||
| 1210 | ||||
| 1211 | char * | |||
| 1212 | relay_expand_http(struct ctl_relay_event *cre, char *val, char *buf, | |||
| 1213 | size_t len) | |||
| 1214 | { | |||
| 1215 | struct rsession *con = cre->con; | |||
| 1216 | struct relay *rlay = con->se_relay; | |||
| 1217 | struct http_descriptor *desc = cre->desc; | |||
| 1218 | struct kv *host, key; | |||
| 1219 | char ibuf[128]; | |||
| 1220 | ||||
| 1221 | if (strlcpy(buf, val, len) >= len) | |||
| 1222 | return (NULL((void*)0)); | |||
| 1223 | ||||
| 1224 | if (strstr(val, "$HOST") != NULL((void*)0)) { | |||
| 1225 | key.kv_key = "Host"; | |||
| 1226 | host = kv_find(&desc->http_headers, &key); | |||
| 1227 | if (host) { | |||
| 1228 | if (host->kv_value == NULL((void*)0)) | |||
| 1229 | return (NULL((void*)0)); | |||
| 1230 | snprintf(ibuf, sizeof(ibuf), "%s", host->kv_value); | |||
| 1231 | } else { | |||
| 1232 | if (print_host(&rlay->rl_conf.ss, | |||
| 1233 | ibuf, sizeof(ibuf)) == NULL((void*)0)) | |||
| 1234 | return (NULL((void*)0)); | |||
| 1235 | } | |||
| 1236 | if (expand_string(buf, len, "$HOST", ibuf)) | |||
| 1237 | return (NULL((void*)0)); | |||
| 1238 | } | |||
| 1239 | if (strstr(val, "$REMOTE_") != NULL((void*)0)) { | |||
| 1240 | if (strstr(val, "$REMOTE_ADDR") != NULL((void*)0)) { | |||
| 1241 | if (print_host(&cre->ss, ibuf, sizeof(ibuf)) == NULL((void*)0)) | |||
| 1242 | return (NULL((void*)0)); | |||
| 1243 | if (expand_string(buf, len, | |||
| 1244 | "$REMOTE_ADDR", ibuf) != 0) | |||
| 1245 | return (NULL((void*)0)); | |||
| 1246 | } | |||
| 1247 | if (strstr(val, "$REMOTE_PORT") != NULL((void*)0)) { | |||
| 1248 | 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))); | |||
| 1249 | if (expand_string(buf, len, | |||
| 1250 | "$REMOTE_PORT", ibuf) != 0) | |||
| 1251 | return (NULL((void*)0)); | |||
| 1252 | } | |||
| 1253 | } | |||
| 1254 | if (strstr(val, "$SERVER_") != NULL((void*)0)) { | |||
| 1255 | if (strstr(val, "$SERVER_ADDR") != NULL((void*)0)) { | |||
| 1256 | if (print_host(&rlay->rl_conf.ss, | |||
| 1257 | ibuf, sizeof(ibuf)) == NULL((void*)0)) | |||
| 1258 | return (NULL((void*)0)); | |||
| 1259 | if (expand_string(buf, len, | |||
| 1260 | "$SERVER_ADDR", ibuf) != 0) | |||
| 1261 | return (NULL((void*)0)); | |||
| 1262 | } | |||
| 1263 | if (strstr(val, "$SERVER_PORT") != NULL((void*)0)) { | |||
| 1264 | snprintf(ibuf, sizeof(ibuf), "%u", | |||
| 1265 | ntohs(rlay->rl_conf.port)(__uint16_t)(__builtin_constant_p(rlay->rl_conf.port) ? (__uint16_t )(((__uint16_t)(rlay->rl_conf.port) & 0xffU) << 8 | ((__uint16_t)(rlay->rl_conf.port) & 0xff00U) >> 8) : __swap16md(rlay->rl_conf.port))); | |||
| 1266 | if (expand_string(buf, len, | |||
| 1267 | "$SERVER_PORT", ibuf) != 0) | |||
| 1268 | return (NULL((void*)0)); | |||
| 1269 | } | |||
| 1270 | if (strstr(val, "$SERVER_NAME") != NULL((void*)0)) { | |||
| 1271 | if (expand_string(buf, len, | |||
| 1272 | "$SERVER_NAME", RELAYD_SERVERNAME"OpenBSD relayd") != 0) | |||
| 1273 | return (NULL((void*)0)); | |||
| 1274 | } | |||
| 1275 | } | |||
| 1276 | if (strstr(val, "$TIMEOUT") != NULL((void*)0)) { | |||
| 1277 | snprintf(ibuf, sizeof(ibuf), "%lld", | |||
| 1278 | (long long)rlay->rl_conf.timeout.tv_sec); | |||
| 1279 | if (expand_string(buf, len, "$TIMEOUT", ibuf) != 0) | |||
| 1280 | return (NULL((void*)0)); | |||
| 1281 | } | |||
| 1282 | ||||
| 1283 | return (buf); | |||
| 1284 | } | |||
| 1285 | ||||
| 1286 | int | |||
| 1287 | relay_writerequest_http(struct ctl_relay_event *dst, | |||
| 1288 | struct ctl_relay_event *cre) | |||
| 1289 | { | |||
| 1290 | struct http_descriptor *desc = (struct http_descriptor *)cre->desc; | |||
| 1291 | const char *name = NULL((void*)0); | |||
| 1292 | ||||
| 1293 | if ((name = relay_httpmethod_byid(desc->http_method)) == NULL((void*)0)) | |||
| 1294 | return (-1); | |||
| 1295 | ||||
| 1296 | if (relay_bufferevent_print(dst, name) == -1 || | |||
| 1297 | relay_bufferevent_print(dst, " ") == -1 || | |||
| 1298 | relay_bufferevent_print(dst, desc->http_pathhttp_pathquery.kv_key) == -1 || | |||
| 1299 | (desc->http_queryhttp_pathquery.kv_value != NULL((void*)0) && | |||
| 1300 | (relay_bufferevent_print(dst, "?") == -1 || | |||
| 1301 | relay_bufferevent_print(dst, desc->http_queryhttp_pathquery.kv_value) == -1)) || | |||
| 1302 | relay_bufferevent_print(dst, " ") == -1 || | |||
| 1303 | relay_bufferevent_print(dst, desc->http_version) == -1) | |||
| 1304 | return (-1); | |||
| 1305 | ||||
| 1306 | return (0); | |||
| 1307 | } | |||
| 1308 | ||||
| 1309 | int | |||
| 1310 | relay_writeresponse_http(struct ctl_relay_event *dst, | |||
| 1311 | struct ctl_relay_event *cre) | |||
| 1312 | { | |||
| 1313 | struct http_descriptor *desc = (struct http_descriptor *)cre->desc; | |||
| 1314 | ||||
| 1315 | DPRINTF("version: %s rescode: %s resmsg: %s", desc->http_version,do {} while(0) | |||
| 1316 | desc->http_rescode, desc->http_resmesg)do {} while(0); | |||
| 1317 | ||||
| 1318 | if (relay_bufferevent_print(dst, desc->http_version) == -1 || | |||
| 1319 | relay_bufferevent_print(dst, " ") == -1 || | |||
| 1320 | relay_bufferevent_print(dst, desc->http_rescodehttp_pathquery.kv_key) == -1 || | |||
| 1321 | relay_bufferevent_print(dst, " ") == -1 || | |||
| 1322 | relay_bufferevent_print(dst, desc->http_resmesghttp_pathquery.kv_value) == -1) | |||
| 1323 | return (-1); | |||
| 1324 | ||||
| 1325 | return (0); | |||
| 1326 | } | |||
| 1327 | ||||
| 1328 | int | |||
| 1329 | relay_writeheader_kv(struct ctl_relay_event *dst, struct kv *hdr) | |||
| 1330 | { | |||
| 1331 | char *ptr; | |||
| 1332 | const char *key; | |||
| 1333 | ||||
| 1334 | if (hdr->kv_flags & KV_FLAG_INVALID0x02) | |||
| 1335 | return (0); | |||
| 1336 | ||||
| 1337 | /* The key might have been updated in the parent */ | |||
| 1338 | if (hdr->kv_parent != NULL((void*)0) && hdr->kv_parent->kv_key != NULL((void*)0)) | |||
| 1339 | key = hdr->kv_parent->kv_key; | |||
| 1340 | else | |||
| 1341 | key = hdr->kv_key; | |||
| 1342 | ||||
| 1343 | ptr = hdr->kv_value; | |||
| 1344 | if (relay_bufferevent_print(dst, key) == -1 || | |||
| 1345 | (ptr != NULL((void*)0) && | |||
| 1346 | (relay_bufferevent_print(dst, ": ") == -1 || | |||
| 1347 | relay_bufferevent_print(dst, ptr) == -1 || | |||
| 1348 | relay_bufferevent_print(dst, "\r\n") == -1))) | |||
| 1349 | return (-1); | |||
| 1350 | DPRINTF("%s: %s: %s", __func__, key,do {} while(0) | |||
| 1351 | hdr->kv_value == NULL ? "" : hdr->kv_value)do {} while(0); | |||
| 1352 | ||||
| 1353 | return (0); | |||
| 1354 | } | |||
| 1355 | ||||
| 1356 | int | |||
| 1357 | relay_writeheader_http(struct ctl_relay_event *dst, struct ctl_relay_event | |||
| 1358 | *cre) | |||
| 1359 | { | |||
| 1360 | struct kv *hdr, *kv; | |||
| 1361 | struct http_descriptor *desc = (struct http_descriptor *)cre->desc; | |||
| 1362 | ||||
| 1363 | RB_FOREACH(hdr, kvtree, &desc->http_headers)for ((hdr) = kvtree_RB_MINMAX(&desc->http_headers, -1) ; (hdr) != ((void*)0); (hdr) = kvtree_RB_NEXT(hdr)) { | |||
| 1364 | if (relay_writeheader_kv(dst, hdr) == -1) | |||
| 1365 | return (-1); | |||
| 1366 | TAILQ_FOREACH(kv, &hdr->kv_children, kv_entry)for((kv) = ((&hdr->kv_children)->tqh_first); (kv) != ((void*)0); (kv) = ((kv)->kv_entry.tqe_next)) { | |||
| 1367 | if (relay_writeheader_kv(dst, kv) == -1) | |||
| 1368 | return (-1); | |||
| 1369 | } | |||
| 1370 | } | |||
| 1371 | ||||
| 1372 | return (0); | |||
| 1373 | } | |||
| 1374 | ||||
| 1375 | enum httpmethod | |||
| 1376 | relay_httpmethod_byname(const char *name) | |||
| 1377 | { | |||
| 1378 | enum httpmethod id = HTTP_METHOD_NONE; | |||
| 1379 | struct http_method method, *res = NULL((void*)0); | |||
| 1380 | ||||
| 1381 | /* Set up key */ | |||
| 1382 | method.method_name = name; | |||
| 1383 | ||||
| 1384 | if ((res = bsearch(&method, http_methods, | |||
| 1385 | sizeof(http_methods) / sizeof(http_methods[0]) - 1, | |||
| 1386 | sizeof(http_methods[0]), relay_httpmethod_cmp)) != NULL((void*)0)) | |||
| 1387 | id = res->method_id; | |||
| 1388 | ||||
| 1389 | return (id); | |||
| 1390 | } | |||
| 1391 | ||||
| 1392 | const char * | |||
| 1393 | relay_httpmethod_byid(u_int id) | |||
| 1394 | { | |||
| 1395 | const char *name = NULL((void*)0); | |||
| 1396 | int i; | |||
| 1397 | ||||
| 1398 | for (i = 0; http_methods[i].method_name != NULL((void*)0); i++) { | |||
| 1399 | if (http_methods[i].method_id == id) { | |||
| 1400 | name = http_methods[i].method_name; | |||
| 1401 | break; | |||
| 1402 | } | |||
| 1403 | } | |||
| 1404 | ||||
| 1405 | return (name); | |||
| 1406 | } | |||
| 1407 | ||||
| 1408 | static int | |||
| 1409 | relay_httpmethod_cmp(const void *a, const void *b) | |||
| 1410 | { | |||
| 1411 | const struct http_method *ma = a; | |||
| 1412 | const struct http_method *mb = b; | |||
| 1413 | ||||
| 1414 | /* | |||
| 1415 | * RFC 2616 section 5.1.1 says that the method is case | |||
| 1416 | * sensitive so we don't do a strcasecmp here. | |||
| 1417 | */ | |||
| 1418 | return (strcmp(ma->method_name, mb->method_name)); | |||
| 1419 | } | |||
| 1420 | ||||
| 1421 | const char * | |||
| 1422 | relay_httperror_byid(u_int id) | |||
| 1423 | { | |||
| 1424 | struct http_error error, *res = NULL((void*)0); | |||
| 1425 | ||||
| 1426 | /* Set up key */ | |||
| 1427 | error.error_code = (int)id; | |||
| 1428 | ||||
| 1429 | res = bsearch(&error, http_errors, | |||
| 1430 | sizeof(http_errors) / sizeof(http_errors[0]) - 1, | |||
| 1431 | sizeof(http_errors[0]), relay_httperror_cmp); | |||
| 1432 | ||||
| 1433 | return (res->error_name); | |||
| 1434 | } | |||
| 1435 | ||||
| 1436 | static int | |||
| 1437 | relay_httperror_cmp(const void *a, const void *b) | |||
| 1438 | { | |||
| 1439 | const struct http_error *ea = a; | |||
| 1440 | const struct http_error *eb = b; | |||
| 1441 | return (ea->error_code - eb->error_code); | |||
| 1442 | } | |||
| 1443 | ||||
| 1444 | int | |||
| 1445 | relay_httpquery_test(struct ctl_relay_event *cre, struct relay_rule *rule, | |||
| 1446 | struct kvlist *actions) | |||
| 1447 | { | |||
| 1448 | struct http_descriptor *desc = cre->desc; | |||
| 1449 | struct kv *match = &desc->http_matchquery; | |||
| 1450 | struct kv *kv = &rule->rule_kv[KEY_TYPE_QUERY]; | |||
| 1451 | int res = 0; | |||
| 1452 | ||||
| 1453 | if (cre->dir == RELAY_DIR_RESPONSE || kv->kv_type != KEY_TYPE_QUERY) | |||
| 1454 | return (0); | |||
| 1455 | else if (kv->kv_key == NULL((void*)0)) | |||
| 1456 | return (0); | |||
| 1457 | else if ((res = relay_lookup_query(cre, kv)) != 0) | |||
| 1458 | return (res); | |||
| 1459 | ||||
| 1460 | relay_match(actions, kv, match, NULL((void*)0)); | |||
| 1461 | ||||
| 1462 | return (0); | |||
| 1463 | } | |||
| 1464 | ||||
| 1465 | int | |||
| 1466 | relay_httpheader_test(struct ctl_relay_event *cre, struct relay_rule *rule, | |||
| 1467 | struct kvlist *actions) | |||
| 1468 | { | |||
| 1469 | struct http_descriptor *desc = cre->desc; | |||
| 1470 | struct kv *kv = &rule->rule_kv[KEY_TYPE_HEADER]; | |||
| 1471 | struct kv *match; | |||
| 1472 | ||||
| 1473 | if (kv->kv_type != KEY_TYPE_HEADER) | |||
| 1474 | return (0); | |||
| 1475 | ||||
| 1476 | match = kv_find(&desc->http_headers, kv); | |||
| 1477 | ||||
| 1478 | if (kv->kv_option == KEY_OPTION_APPEND || | |||
| 1479 | kv->kv_option == KEY_OPTION_SET) { | |||
| 1480 | /* header can be NULL and will be added later */ | |||
| 1481 | } else if (match == NULL((void*)0)) { | |||
| 1482 | /* Fail if header doesn't exist */ | |||
| 1483 | return (-1); | |||
| 1484 | } else { | |||
| 1485 | if (fnmatch(kv->kv_key, match->kv_key, | |||
| 1486 | FNM_CASEFOLD0x10) == FNM_NOMATCH1) | |||
| 1487 | return (-1); | |||
| 1488 | if (kv->kv_value != NULL((void*)0) && | |||
| 1489 | match->kv_value != NULL((void*)0) && | |||
| 1490 | fnmatch(kv->kv_value, match->kv_value, 0) == FNM_NOMATCH1) | |||
| 1491 | return (-1); | |||
| 1492 | } | |||
| 1493 | ||||
| 1494 | relay_match(actions, kv, match, &desc->http_headers); | |||
| 1495 | ||||
| 1496 | return (0); | |||
| 1497 | } | |||
| 1498 | ||||
| 1499 | int | |||
| 1500 | relay_httppath_test(struct ctl_relay_event *cre, struct relay_rule *rule, | |||
| 1501 | struct kvlist *actions) | |||
| 1502 | { | |||
| 1503 | struct http_descriptor *desc = cre->desc; | |||
| 1504 | struct kv *kv = &rule->rule_kv[KEY_TYPE_PATH]; | |||
| 1505 | struct kv *match = &desc->http_pathquery; | |||
| 1506 | const char *query; | |||
| 1507 | ||||
| 1508 | if (cre->dir == RELAY_DIR_RESPONSE || kv->kv_type != KEY_TYPE_PATH) | |||
| 1509 | return (0); | |||
| 1510 | else if (kv->kv_option != KEY_OPTION_STRIP) { | |||
| 1511 | if (kv->kv_key == NULL((void*)0)) | |||
| 1512 | return (0); | |||
| 1513 | else if (fnmatch(kv->kv_key, desc->http_pathhttp_pathquery.kv_key, 0) == FNM_NOMATCH1) | |||
| 1514 | return (-1); | |||
| 1515 | else if (kv->kv_value != NULL((void*)0) && kv->kv_option == KEY_OPTION_NONE) { | |||
| 1516 | query = desc->http_queryhttp_pathquery.kv_value == NULL((void*)0) ? "" : desc->http_queryhttp_pathquery.kv_value; | |||
| 1517 | if (fnmatch(kv->kv_value, query, FNM_CASEFOLD0x10) == FNM_NOMATCH1) | |||
| 1518 | return (-1); | |||
| 1519 | } | |||
| 1520 | } | |||
| 1521 | ||||
| 1522 | relay_match(actions, kv, match, NULL((void*)0)); | |||
| 1523 | ||||
| 1524 | return (0); | |||
| 1525 | } | |||
| 1526 | ||||
| 1527 | int | |||
| 1528 | relay_httpurl_test(struct ctl_relay_event *cre, struct relay_rule *rule, | |||
| 1529 | struct kvlist *actions) | |||
| 1530 | { | |||
| 1531 | struct http_descriptor *desc = cre->desc; | |||
| 1532 | struct kv *host, key; | |||
| 1533 | struct kv *kv = &rule->rule_kv[KEY_TYPE_URL]; | |||
| 1534 | struct kv *match = &desc->http_pathquery; | |||
| 1535 | int res; | |||
| 1536 | ||||
| 1537 | if (cre->dir == RELAY_DIR_RESPONSE || kv->kv_type != KEY_TYPE_URL || | |||
| 1538 | kv->kv_key == NULL((void*)0)) | |||
| 1539 | return (0); | |||
| 1540 | ||||
| 1541 | key.kv_key = "Host"; | |||
| 1542 | host = kv_find(&desc->http_headers, &key); | |||
| 1543 | ||||
| 1544 | if (host == NULL((void*)0) || host->kv_value == NULL((void*)0)) | |||
| 1545 | return (0); | |||
| 1546 | else if (rule->rule_action != RULE_ACTION_BLOCK && | |||
| 1547 | kv->kv_option == KEY_OPTION_LOG && | |||
| 1548 | fnmatch(kv->kv_key, match->kv_key, FNM_CASEFOLD0x10) != FNM_NOMATCH1) { | |||
| 1549 | /* fnmatch url only for logging */ | |||
| 1550 | } else if ((res = relay_lookup_url(cre, host->kv_value, kv)) != 0) | |||
| 1551 | return (res); | |||
| 1552 | relay_match(actions, kv, match, NULL((void*)0)); | |||
| 1553 | ||||
| 1554 | return (0); | |||
| 1555 | } | |||
| 1556 | ||||
| 1557 | int | |||
| 1558 | relay_httpcookie_test(struct ctl_relay_event *cre, struct relay_rule *rule, | |||
| 1559 | struct kvlist *actions) | |||
| 1560 | { | |||
| 1561 | struct http_descriptor *desc = cre->desc; | |||
| 1562 | struct kv *kv = &rule->rule_kv[KEY_TYPE_COOKIE], key; | |||
| 1563 | struct kv *match = NULL((void*)0); | |||
| 1564 | int res; | |||
| 1565 | ||||
| 1566 | if (kv->kv_type != KEY_TYPE_COOKIE) | |||
| 1567 | return (0); | |||
| 1568 | ||||
| 1569 | switch (cre->dir) { | |||
| 1570 | case RELAY_DIR_REQUEST: | |||
| 1571 | key.kv_key = "Cookie"; | |||
| 1572 | break; | |||
| 1573 | case RELAY_DIR_RESPONSE: | |||
| 1574 | key.kv_key = "Set-Cookie"; | |||
| 1575 | break; | |||
| 1576 | default: | |||
| 1577 | return (0); | |||
| 1578 | /* NOTREACHED */ | |||
| 1579 | break; | |||
| 1580 | } | |||
| 1581 | ||||
| 1582 | if (kv->kv_option == KEY_OPTION_APPEND || | |||
| 1583 | kv->kv_option == KEY_OPTION_SET) { | |||
| 1584 | /* no cookie, can be NULL and will be added later */ | |||
| 1585 | } else { | |||
| 1586 | match = kv_find(&desc->http_headers, &key); | |||
| 1587 | if (match == NULL((void*)0)) | |||
| 1588 | return (-1); | |||
| 1589 | if (kv->kv_key == NULL((void*)0) || match->kv_value == NULL((void*)0)) | |||
| 1590 | return (0); | |||
| 1591 | else if ((res = relay_lookup_cookie(cre, match->kv_value, | |||
| 1592 | kv)) != 0) | |||
| 1593 | return (res); | |||
| 1594 | } | |||
| 1595 | ||||
| 1596 | relay_match(actions, kv, match, &desc->http_headers); | |||
| 1597 | ||||
| 1598 | return (0); | |||
| 1599 | } | |||
| 1600 | ||||
| 1601 | int | |||
| 1602 | relay_match_actions(struct ctl_relay_event *cre, struct relay_rule *rule, | |||
| 1603 | struct kvlist *matches, struct kvlist *actions, struct relay_table **tbl) | |||
| 1604 | { | |||
| 1605 | struct rsession *con = cre->con; | |||
| 1606 | struct kv *kv; | |||
| 1607 | ||||
| 1608 | /* | |||
| 1609 | * Apply the following options instantly (action per match). | |||
| 1610 | */ | |||
| 1611 | if (rule->rule_table != NULL((void*)0)) { | |||
| 1612 | *tbl = rule->rule_table; | |||
| 1613 | con->se_out.ss.ss_family = AF_UNSPEC0; | |||
| 1614 | } | |||
| 1615 | if (rule->rule_tag != 0) | |||
| 1616 | con->se_tag = rule->rule_tag == -1 ? 0 : rule->rule_tag; | |||
| 1617 | if (rule->rule_label != 0) | |||
| 1618 | con->se_label = rule->rule_label == -1 ? 0 : rule->rule_label; | |||
| 1619 | ||||
| 1620 | /* | |||
| 1621 | * Apply the remaining options once after evaluation. | |||
| 1622 | */ | |||
| 1623 | if (matches == NULL((void*)0)) { | |||
| 1624 | /* 'pass' or 'block' rule */ | |||
| 1625 | 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); | |||
| 1626 | } else { | |||
| 1627 | /* 'match' rule */ | |||
| 1628 | TAILQ_FOREACH(kv, matches, kv_match_entry)for((kv) = ((matches)->tqh_first); (kv) != ((void*)0); (kv ) = ((kv)->kv_match_entry.tqe_next)) { | |||
| 1629 | 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); | |||
| 1630 | } | |||
| 1631 | } | |||
| 1632 | ||||
| 1633 | return (0); | |||
| 1634 | } | |||
| 1635 | ||||
| 1636 | int | |||
| 1637 | relay_apply_actions(struct ctl_relay_event *cre, struct kvlist *actions, | |||
| 1638 | struct relay_table *tbl) | |||
| 1639 | { | |||
| 1640 | struct rsession *con = cre->con; | |||
| 1641 | struct http_descriptor *desc = cre->desc; | |||
| 1642 | struct kv *host = NULL((void*)0); | |||
| 1643 | const char *value; | |||
| 1644 | struct kv *kv, *match, *kp, *mp, kvcopy, matchcopy, key; | |||
| 1645 | int addkv, ret, nstrip; | |||
| 1646 | char buf[IBUF_READ_SIZE65535], *ptr; | |||
| 1647 | char *msg = NULL((void*)0); | |||
| 1648 | const char *meth = NULL((void*)0); | |||
| 1649 | ||||
| 1650 | memset(&kvcopy, 0, sizeof(kvcopy)); | |||
| 1651 | memset(&matchcopy, 0, sizeof(matchcopy)); | |||
| 1652 | ||||
| 1653 | ret = -1; | |||
| 1654 | kp = mp = NULL((void*)0); | |||
| 1655 | TAILQ_FOREACH(kv, actions, kv_action_entry)for((kv) = ((actions)->tqh_first); (kv) != ((void*)0); (kv ) = ((kv)->kv_action_entry.tqe_next)) { | |||
| 1656 | kp = NULL((void*)0); | |||
| 1657 | match = kv->kv_match; | |||
| 1658 | addkv = 0; | |||
| 1659 | ||||
| 1660 | /* | |||
| 1661 | * Although marked as deleted, give a chance to non-critical | |||
| 1662 | * actions, ie. log, to be performed | |||
| 1663 | */ | |||
| 1664 | if (match != NULL((void*)0) && (match->kv_flags & KV_FLAG_INVALID0x02)) | |||
| 1665 | goto matchdel; | |||
| 1666 | ||||
| 1667 | switch (kv->kv_option) { | |||
| 1668 | case KEY_OPTION_APPEND: | |||
| 1669 | case KEY_OPTION_SET: | |||
| 1670 | switch (kv->kv_type) { | |||
| 1671 | case KEY_TYPE_PATH: | |||
| 1672 | if (kv->kv_option == KEY_OPTION_APPEND) { | |||
| 1673 | if (kv_setkey(match, "%s%s", | |||
| 1674 | match->kv_key, kv->kv_key) == -1) | |||
| 1675 | goto fail; | |||
| 1676 | } else { | |||
| 1677 | if (kv_setkey(match, "%s", | |||
| 1678 | kv->kv_value) == -1) | |||
| 1679 | goto fail; | |||
| 1680 | } | |||
| 1681 | break; | |||
| 1682 | case KEY_TYPE_COOKIE: | |||
| 1683 | kp = &kvcopy; | |||
| 1684 | if (kv_inherit(kp, kv) == NULL((void*)0)) | |||
| 1685 | goto fail; | |||
| 1686 | if (kv_set(kp, "%s=%s;", kp->kv_key, | |||
| 1687 | kp->kv_value) == -1) | |||
| 1688 | goto fail; | |||
| 1689 | if (kv_setkey(kp, "%s", cre->dir == | |||
| 1690 | RELAY_DIR_REQUEST ? | |||
| 1691 | "Cookie" : "Set-Cookie") == -1) | |||
| 1692 | goto fail; | |||
| 1693 | /* FALLTHROUGH cookie is a header */ | |||
| 1694 | case KEY_TYPE_HEADER: | |||
| 1695 | if (match == NULL((void*)0)) { | |||
| 1696 | addkv = 1; | |||
| 1697 | break; | |||
| 1698 | } | |||
| 1699 | if (match->kv_value == NULL((void*)0) || | |||
| 1700 | kv->kv_option == KEY_OPTION_SET) { | |||
| 1701 | if (kv_set(match, "%s", | |||
| 1702 | kv->kv_value) == -1) | |||
| 1703 | goto fail; | |||
| 1704 | } else | |||
| 1705 | addkv = 1; | |||
| 1706 | break; | |||
| 1707 | default: | |||
| 1708 | /* query, url not supported */ | |||
| 1709 | break; | |||
| 1710 | } | |||
| 1711 | break; | |||
| 1712 | case KEY_OPTION_REMOVE: | |||
| 1713 | switch (kv->kv_type) { | |||
| 1714 | case KEY_TYPE_PATH: | |||
| 1715 | if (kv_setkey(match, "/") == -1) | |||
| 1716 | goto fail; | |||
| 1717 | break; | |||
| 1718 | case KEY_TYPE_COOKIE: | |||
| 1719 | case KEY_TYPE_HEADER: | |||
| 1720 | if (kv->kv_matchtree != NULL((void*)0)) | |||
| 1721 | match->kv_flags |= KV_FLAG_INVALID0x02; | |||
| 1722 | else | |||
| 1723 | kv_free(match); | |||
| 1724 | match = kv->kv_match = NULL((void*)0); | |||
| 1725 | break; | |||
| 1726 | default: | |||
| 1727 | /* query and url not supported */ | |||
| 1728 | break; | |||
| 1729 | } | |||
| 1730 | break; | |||
| 1731 | case KEY_OPTION_HASH: | |||
| 1732 | switch (kv->kv_type) { | |||
| 1733 | case KEY_TYPE_PATH: | |||
| 1734 | value = match->kv_key; | |||
| 1735 | break; | |||
| 1736 | default: | |||
| 1737 | value = match->kv_value; | |||
| 1738 | break; | |||
| 1739 | } | |||
| 1740 | SipHash24_Update(&con->se_siphashctx,SipHash_Update((&con->se_siphashctx), 2, 4, (value), ( strlen(value))) | |||
| 1741 | value, strlen(value))SipHash_Update((&con->se_siphashctx), 2, 4, (value), ( strlen(value))); | |||
| 1742 | break; | |||
| 1743 | case KEY_OPTION_LOG: | |||
| 1744 | /* perform this later */ | |||
| 1745 | break; | |||
| 1746 | case KEY_OPTION_STRIP: | |||
| 1747 | nstrip = strtonum(kv->kv_value, 0, INT_MAX2147483647, NULL((void*)0)); | |||
| 1748 | if (kv->kv_type == KEY_TYPE_PATH) { | |||
| 1749 | if (kv_setkey(match, "%s", | |||
| 1750 | server_root_strip(match->kv_key, | |||
| 1751 | nstrip)) == -1) | |||
| 1752 | goto fail; | |||
| 1753 | } | |||
| 1754 | break; | |||
| 1755 | default: | |||
| 1756 | fatalx("%s: invalid action", __func__); | |||
| 1757 | /* NOTREACHED */ | |||
| 1758 | } | |||
| 1759 | ||||
| 1760 | /* from now on, reads from kp writes to kv */ | |||
| 1761 | if (kp == NULL((void*)0)) | |||
| 1762 | kp = kv; | |||
| 1763 | if (addkv && kv->kv_matchtree != NULL((void*)0)) { | |||
| 1764 | /* Add new entry to the list (eg. new HTTP header) */ | |||
| 1765 | if ((match = kv_add(kv->kv_matchtree, kp->kv_key, | |||
| 1766 | kp->kv_value, 0)) == NULL((void*)0)) | |||
| 1767 | goto fail; | |||
| 1768 | match->kv_option = kp->kv_option; | |||
| 1769 | match->kv_type = kp->kv_type; | |||
| 1770 | kv->kv_match = match; | |||
| 1771 | } | |||
| 1772 | if (match != NULL((void*)0) && kp->kv_flags & KV_FLAG_MACRO0x01) { | |||
| 1773 | bzero(buf, sizeof(buf)); | |||
| 1774 | if ((ptr = relay_expand_http(cre, kp->kv_value, buf, | |||
| 1775 | sizeof(buf))) == NULL((void*)0)) | |||
| 1776 | goto fail; | |||
| 1777 | if (kv_set(match, "%s", ptr) == -1) | |||
| 1778 | goto fail; | |||
| 1779 | } | |||
| 1780 | ||||
| 1781 | matchdel: | |||
| 1782 | switch (kv->kv_option) { | |||
| 1783 | case KEY_OPTION_LOG: | |||
| 1784 | if (match == NULL((void*)0)) | |||
| 1785 | break; | |||
| 1786 | mp = &matchcopy; | |||
| 1787 | if (kv_inherit(mp, match) == NULL((void*)0)) | |||
| 1788 | goto fail; | |||
| 1789 | if (mp->kv_flags & KV_FLAG_INVALID0x02) { | |||
| 1790 | if (kv_set(mp, "%s (removed)", | |||
| 1791 | mp->kv_value) == -1) | |||
| 1792 | goto fail; | |||
| 1793 | } | |||
| 1794 | switch (kv->kv_type) { | |||
| 1795 | case KEY_TYPE_URL: | |||
| 1796 | key.kv_key = "Host"; | |||
| 1797 | host = kv_find(&desc->http_headers, &key); | |||
| 1798 | switch (kv->kv_digest) { | |||
| 1799 | case DIGEST_NONE: | |||
| 1800 | if (host == NULL((void*)0) || | |||
| 1801 | host->kv_value == NULL((void*)0)) | |||
| 1802 | break; | |||
| 1803 | if (kv_setkey(mp, "%s%s", | |||
| 1804 | host->kv_value, mp->kv_key) == | |||
| 1805 | -1) | |||
| 1806 | goto fail; | |||
| 1807 | break; | |||
| 1808 | default: | |||
| 1809 | if (kv_setkey(mp, "%s", kv->kv_key) | |||
| 1810 | == -1) | |||
| 1811 | goto fail; | |||
| 1812 | break; | |||
| 1813 | } | |||
| 1814 | break; | |||
| 1815 | default: | |||
| 1816 | break; | |||
| 1817 | } | |||
| 1818 | if (kv_log(con, mp, con->se_label, cre->dir) | |||
| 1819 | == -1) | |||
| 1820 | goto fail; | |||
| 1821 | break; | |||
| 1822 | default: | |||
| 1823 | break; | |||
| 1824 | } | |||
| 1825 | ||||
| 1826 | /* actions applied, cleanup kv */ | |||
| 1827 | kv->kv_match = NULL((void*)0); | |||
| 1828 | kv->kv_matchtree = NULL((void*)0); | |||
| 1829 | 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); | |||
| 1830 | ||||
| 1831 | kv_free(&kvcopy); | |||
| 1832 | kv_free(&matchcopy); | |||
| 1833 | } | |||
| 1834 | ||||
| 1835 | /* | |||
| 1836 | * Change the backend if the forward table has been changed. | |||
| 1837 | * This only works in the request direction. | |||
| 1838 | */ | |||
| 1839 | if (cre->dir == RELAY_DIR_REQUEST && con->se_table != tbl) { | |||
| 1840 | relay_reset_event(con, &con->se_out); | |||
| 1841 | con->se_table = tbl; | |||
| 1842 | con->se_haslog = 1; | |||
| 1843 | } | |||
| 1844 | ||||
| 1845 | /* | |||
| 1846 | * log tag for request and response, request method | |||
| 1847 | * and end of request marker "," | |||
| 1848 | */ | |||
| 1849 | if ((con->se_log != NULL((void*)0)) && | |||
| 1850 | ((meth = relay_httpmethod_byid(desc->http_method)) != NULL((void*)0)) && | |||
| 1851 | (asprintf(&msg, " %s", meth) != -1)) | |||
| 1852 | evbuffer_add(con->se_log, msg, strlen(msg)); | |||
| 1853 | free(msg); | |||
| 1854 | relay_log(con, cre->dir == RELAY_DIR_REQUEST ? "" : ";"); | |||
| 1855 | ret = 0; | |||
| 1856 | fail: | |||
| 1857 | kv_free(&kvcopy); | |||
| 1858 | kv_free(&matchcopy); | |||
| 1859 | ||||
| 1860 | return (ret); | |||
| 1861 | } | |||
| 1862 | ||||
| 1863 | #define RELAY_GET_SKIP_STEP(i)do { r = r->rule_skip[i]; do {} while(0); } while (0) \ | |||
| 1864 | do { \ | |||
| 1865 | r = r->rule_skip[i]; \ | |||
| 1866 | DPRINTF("%s:%d: skip %d rules", __func__, __LINE__, i)do {} while(0); \ | |||
| 1867 | } while (0) | |||
| 1868 | ||||
| 1869 | #define RELAY_GET_NEXT_STEPdo { do {} while(0); goto nextrule; } while (0) \ | |||
| 1870 | do { \ | |||
| 1871 | DPRINTF("%s:%d: next rule", __func__, __LINE__)do {} while(0); \ | |||
| 1872 | goto nextrule; \ | |||
| 1873 | } while (0) | |||
| 1874 | ||||
| 1875 | int | |||
| 1876 | relay_test(struct protocol *proto, struct ctl_relay_event *cre) | |||
| 1877 | { | |||
| 1878 | struct rsession *con; | |||
| 1879 | struct http_descriptor *desc = cre->desc; | |||
| 1880 | struct relay_rule *r = NULL((void*)0), *rule = NULL((void*)0); | |||
| 1881 | struct relay_table *tbl = NULL((void*)0); | |||
| 1882 | u_int cnt = 0; | |||
| 1883 | u_int action = RES_PASS; | |||
| 1884 | struct kvlist actions, matches; | |||
| 1885 | struct kv *kv; | |||
| 1886 | int res = 0; | |||
| 1887 | ||||
| 1888 | con = cre->con; | |||
| 1889 | TAILQ_INIT(&actions)do { (&actions)->tqh_first = ((void*)0); (&actions )->tqh_last = &(&actions)->tqh_first; } while ( 0); | |||
| 1890 | ||||
| 1891 | r = TAILQ_FIRST(&proto->rules)((&proto->rules)->tqh_first); | |||
| 1892 | while (r != NULL((void*)0)) { | |||
| 1893 | cnt++; | |||
| 1894 | ||||
| 1895 | TAILQ_INIT(&matches)do { (&matches)->tqh_first = ((void*)0); (&matches )->tqh_last = &(&matches)->tqh_first; } while ( 0); | |||
| 1896 | 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); | |||
| 1897 | ||||
| 1898 | if (r->rule_dir && r->rule_dir != cre->dir) | |||
| 1899 | RELAY_GET_SKIP_STEP(RULE_SKIP_DIR)do { r = r->rule_skip[1]; do {} while(0); } while (0); | |||
| 1900 | else if (proto->type != r->rule_proto) | |||
| 1901 | RELAY_GET_SKIP_STEP(RULE_SKIP_PROTO)do { r = r->rule_skip[0]; do {} while(0); } while (0); | |||
| 1902 | 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))) || | |||
| 1903 | 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 )))) | |||
| 1904 | RELAY_GET_SKIP_STEP(RULE_SKIP_AF)do { r = r->rule_skip[2]; do {} while(0); } while (0); | |||
| 1905 | 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) | |||
| 1906 | RELAY_GET_SKIP_STEP(RULE_SKIP_SRC)do { r = r->rule_skip[3]; do {} while(0); } while (0); | |||
| 1907 | 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) | |||
| 1908 | RELAY_GET_SKIP_STEP(RULE_SKIP_DST)do { r = r->rule_skip[4]; do {} while(0); } while (0); | |||
| 1909 | else if (r->rule_method != HTTP_METHOD_NONE && | |||
| 1910 | (desc->http_method == HTTP_METHOD_RESPONSE || | |||
| 1911 | desc->http_method != r->rule_method)) | |||
| 1912 | RELAY_GET_SKIP_STEP(RULE_SKIP_METHOD)do { r = r->rule_skip[5]; do {} while(0); } while (0); | |||
| 1913 | else if (r->rule_tagged && con->se_tag != r->rule_tagged) | |||
| 1914 | RELAY_GET_NEXT_STEPdo { do {} while(0); goto nextrule; } while (0); | |||
| 1915 | else if (relay_httpheader_test(cre, r, &matches) != 0) | |||
| 1916 | RELAY_GET_NEXT_STEPdo { do {} while(0); goto nextrule; } while (0); | |||
| 1917 | else if ((res = relay_httpquery_test(cre, r, &matches)) != 0) | |||
| 1918 | RELAY_GET_NEXT_STEPdo { do {} while(0); goto nextrule; } while (0); | |||
| 1919 | else if (relay_httppath_test(cre, r, &matches) != 0) | |||
| 1920 | RELAY_GET_NEXT_STEPdo { do {} while(0); goto nextrule; } while (0); | |||
| 1921 | else if ((res = relay_httpurl_test(cre, r, &matches)) != 0) | |||
| 1922 | RELAY_GET_NEXT_STEPdo { do {} while(0); goto nextrule; } while (0); | |||
| 1923 | else if ((res = relay_httpcookie_test(cre, r, &matches)) != 0) | |||
| 1924 | RELAY_GET_NEXT_STEPdo { do {} while(0); goto nextrule; } while (0); | |||
| 1925 | else { | |||
| 1926 | DPRINTF("%s: session %d: matched rule %d",do {} while(0) | |||
| 1927 | __func__, con->se_id, r->rule_id)do {} while(0); | |||
| 1928 | ||||
| 1929 | if (r->rule_action == RULE_ACTION_MATCH) { | |||
| 1930 | if (relay_match_actions(cre, r, &matches, | |||
| 1931 | &actions, &tbl) != 0) { | |||
| 1932 | /* Something bad happened, drop */ | |||
| 1933 | action = RES_DROP; | |||
| 1934 | break; | |||
| 1935 | } | |||
| 1936 | RELAY_GET_NEXT_STEPdo { do {} while(0); goto nextrule; } while (0); | |||
| 1937 | } else if (r->rule_action == RULE_ACTION_BLOCK) | |||
| 1938 | action = RES_DROP; | |||
| 1939 | else if (r->rule_action == RULE_ACTION_PASS) | |||
| 1940 | action = RES_PASS; | |||
| 1941 | ||||
| 1942 | /* Rule matched */ | |||
| 1943 | rule = r; | |||
| 1944 | ||||
| 1945 | /* Temporarily save actions */ | |||
| 1946 | TAILQ_FOREACH(kv, &matches, kv_match_entry)for((kv) = ((&matches)->tqh_first); (kv) != ((void*)0) ; (kv) = ((kv)->kv_match_entry.tqe_next)) { | |||
| 1947 | 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) | |||
| 1948 | 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); | |||
| 1949 | } | |||
| 1950 | ||||
| 1951 | if (rule->rule_flags & RULE_FLAG_QUICK0x01) | |||
| 1952 | break; | |||
| 1953 | ||||
| 1954 | nextrule: | |||
| 1955 | /* Continue to find last matching policy */ | |||
| 1956 | DPRINTF("%s: session %d, res %d", __func__,do {} while(0) | |||
| 1957 | con->se_id, res)do {} while(0); | |||
| 1958 | if (res == RES_BAD || res == RES_INTERNAL) | |||
| 1959 | return (res); | |||
| 1960 | res = 0; | |||
| 1961 | r = TAILQ_NEXT(r, rule_entry)((r)->rule_entry.tqe_next); | |||
| 1962 | } | |||
| 1963 | } | |||
| 1964 | ||||
| 1965 | if (rule != NULL((void*)0) && relay_match_actions(cre, rule, NULL((void*)0), &actions, &tbl) | |||
| 1966 | != 0) { | |||
| 1967 | /* Something bad happened, drop */ | |||
| 1968 | action = RES_DROP; | |||
| 1969 | } | |||
| 1970 | ||||
| 1971 | if (relay_apply_actions(cre, &actions, tbl) != 0) { | |||
| 1972 | /* Something bad happened, drop */ | |||
| 1973 | action = RES_DROP; | |||
| 1974 | } | |||
| 1975 | ||||
| 1976 | DPRINTF("%s: session %d: action %d", __func__,do {} while(0) | |||
| 1977 | con->se_id, action)do {} while(0); | |||
| 1978 | ||||
| 1979 | return (action); | |||
| 1980 | } | |||
| 1981 | ||||
| 1982 | #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) \ | |||
| 1983 | do { \ | |||
| 1984 | while (head[i] != cur) { \ | |||
| 1985 | head[i]->rule_skip[i] = cur; \ | |||
| 1986 | head[i] = TAILQ_NEXT(head[i], rule_entry)((head[i])->rule_entry.tqe_next); \ | |||
| 1987 | } \ | |||
| 1988 | } while (0) | |||
| 1989 | ||||
| 1990 | /* This code is derived from pf_calc_skip_steps() from pf.c */ | |||
| 1991 | void | |||
| 1992 | relay_calc_skip_steps(struct relay_rules *rules) | |||
| 1993 | { | |||
| 1994 | struct relay_rule *head[RULE_SKIP_COUNT6], *cur, *prev; | |||
| 1995 | int i; | |||
| 1996 | ||||
| 1997 | cur = TAILQ_FIRST(rules)((rules)->tqh_first); | |||
| 1998 | prev = cur; | |||
| 1999 | for (i = 0; i < RULE_SKIP_COUNT6; ++i) | |||
| 2000 | head[i] = cur; | |||
| 2001 | while (cur != NULL((void*)0)) { | |||
| 2002 | if (cur->rule_dir != prev->rule_dir) | |||
| 2003 | 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); | |||
| 2004 | else if (cur->rule_proto != prev->rule_proto) | |||
| 2005 | 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); | |||
| 2006 | 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)))) | |||
| 2007 | 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); | |||
| 2008 | 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)) | |||
| 2009 | 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); | |||
| 2010 | 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)) | |||
| 2011 | 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); | |||
| 2012 | else if (cur->rule_method != prev->rule_method) | |||
| 2013 | 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); | |||
| 2014 | ||||
| 2015 | prev = cur; | |||
| 2016 | cur = TAILQ_NEXT(cur, rule_entry)((cur)->rule_entry.tqe_next); | |||
| 2017 | } | |||
| 2018 | for (i = 0; i < RULE_SKIP_COUNT6; ++i) | |||
| 2019 | 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); | |||
| 2020 | } | |||
| 2021 | ||||
| 2022 | void | |||
| 2023 | relay_match(struct kvlist *actions, struct kv *kv, struct kv *match, | |||
| 2024 | struct kvtree *matchtree) | |||
| 2025 | { | |||
| 2026 | if (kv->kv_option != KEY_OPTION_NONE) { | |||
| 2027 | kv->kv_match = match; | |||
| 2028 | kv->kv_matchtree = matchtree; | |||
| 2029 | 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); | |||
| 2030 | } | |||
| 2031 | } | |||
| 2032 | ||||
| 2033 | char * | |||
| 2034 | server_root_strip(char *path, int n) | |||
| 2035 | { | |||
| 2036 | char *p; | |||
| 2037 | ||||
| 2038 | /* Strip strip leading directories. Leading '/' is ignored. */ | |||
| 2039 | for (; n > 0 && *path != '\0'; n--) | |||
| 2040 | if ((p = strchr(++path, '/')) != NULL((void*)0)) | |||
| 2041 | path = p; | |||
| 2042 | else | |||
| 2043 | path--; | |||
| 2044 | ||||
| 2045 | return (path); | |||
| 2046 | } | |||
| 2047 |