/* Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include "mod_proxy.h" #include "mod_core.h" #include "apr_optional.h" #include "apr_strings.h" #include "scoreboard.h" #include "mod_status.h" #include "proxy_util.h" #if (MODULE_MAGIC_NUMBER_MAJOR > 20020903) #include "mod_ssl.h" #else APR_DECLARE_OPTIONAL_FN(int, ssl_proxy_enable, (conn_rec *)); APR_DECLARE_OPTIONAL_FN(int, ssl_engine_disable, (conn_rec *)); APR_DECLARE_OPTIONAL_FN(int, ssl_engine_set, (conn_rec *, ap_conf_vector_t *, int proxy, int enable)); #endif #ifndef MAX #define MAX(x,y) ((x) >= (y) ? (x) : (y)) #endif /* * We do health-checks only if that (sub)module is loaded in. This * allows for us to continue as is w/o requiring mod_watchdog for * those implementations which aren't using health checks */ static APR_OPTIONAL_FN_TYPE(set_worker_hc_param) *set_worker_hc_param_f = NULL; /* Externals */ proxy_hcmethods_t PROXY_DECLARE_DATA proxy_hcmethods[] = { {NONE, "NONE", 1}, {TCP, "TCP", 1}, {OPTIONS, "OPTIONS", 1}, {HEAD, "HEAD", 1}, {GET, "GET", 1}, {CPING, "CPING", 0}, {PROVIDER, "PROVIDER", 0}, {OPTIONS11, "OPTIONS11", 1}, {HEAD11, "HEAD11", 1}, {GET11, "GET11", 1}, {EOT, NULL, 1} }; proxy_wstat_t PROXY_DECLARE_DATA proxy_wstat_tbl[] = { {PROXY_WORKER_INITIALIZED, PROXY_WORKER_INITIALIZED_FLAG, "Init "}, {PROXY_WORKER_IGNORE_ERRORS, PROXY_WORKER_IGNORE_ERRORS_FLAG, "Ign "}, {PROXY_WORKER_DRAIN, PROXY_WORKER_DRAIN_FLAG, "Drn "}, {PROXY_WORKER_GENERIC, PROXY_WORKER_GENERIC_FLAG, "Gen "}, {PROXY_WORKER_IN_SHUTDOWN, PROXY_WORKER_IN_SHUTDOWN_FLAG, "Shut "}, {PROXY_WORKER_DISABLED, PROXY_WORKER_DISABLED_FLAG, "Dis "}, {PROXY_WORKER_STOPPED, PROXY_WORKER_STOPPED_FLAG, "Stop "}, {PROXY_WORKER_IN_ERROR, PROXY_WORKER_IN_ERROR_FLAG, "Err "}, {PROXY_WORKER_HOT_STANDBY, PROXY_WORKER_HOT_STANDBY_FLAG, "Stby "}, {PROXY_WORKER_HOT_SPARE, PROXY_WORKER_HOT_SPARE_FLAG, "Spar "}, {PROXY_WORKER_FREE, PROXY_WORKER_FREE_FLAG, "Free "}, {PROXY_WORKER_HC_FAIL, PROXY_WORKER_HC_FAIL_FLAG, "HcFl "}, {0x0, '\0', NULL} }; static const char * const proxy_id = "proxy"; apr_global_mutex_t *proxy_mutex = NULL; /* * A Web proxy module. Stages: * * translate_name: set filename to proxy:<URL> * map_to_storage: run proxy_walk (rather than directory_walk/file_walk) * can't trust directory_walk/file_walk since these are * not in our filesystem. Prevents mod_http from serving * the TRACE request we will set aside to handle later. * fix_ups: convert the URL stored in the filename to the * canonical form. * handler: handle proxy requests */ /* -------------------------------------------------------------- */ /* Translate the URL into a 'filename' */ static const char *set_worker_param(apr_pool_t *p, server_rec *s, proxy_worker *worker, const char *key, const char *val) { int ival; apr_interval_time_t timeout; if (!strcasecmp(key, "loadfactor")) { /* Normalized load factor. Used with BalancerMember, * it is a number between 1 and 100. */ double fval = atof(val); ival = fval * 100.0; if (ival < 100 || ival > 10000) return "LoadFactor must be a number between 1..100"; worker->s->lbfactor = ival; } else if (!strcasecmp(key, "retry")) { /* If set it will give the retry timeout for the worker * The default value is 60 seconds, meaning that if * in error state, it will be retried after that timeout. */ ival = atoi(val); if (ival < 0) return "Retry must be a positive value"; worker->s->retry = apr_time_from_sec(ival); worker->s->retry_set = 1; } else if (!strcasecmp(key, "ttl")) { /* Time in seconds that will destroy all the connections * that exceed the smax */ ival = atoi(val); if (ival < 1) return "TTL must be at least one second"; worker->s->ttl = apr_time_from_sec(ival); } else if (!strcasecmp(key, "min")) { /* Initial number of connections to remote */ ival = atoi(val); if (ival < 0) return "Min must be a positive number"; worker->s->min = ival; } else if (!strcasecmp(key, "max")) { /* Maximum number of connections to remote */ ival = atoi(val); if (ival < 0) return "Max must be a positive number"; worker->s->hmax = ival; } /* XXX: More intelligent naming needed */ else if (!strcasecmp(key, "smax")) { /* Maximum number of connections to remote that * will not be destroyed */ ival = atoi(val); if (ival < 0) return "Smax must be a positive number"; worker->s->smax = ival; } else if (!strcasecmp(key, "acquire")) { /* Acquire timeout in given unit (default is milliseconds). * If set this will be the maximum time to * wait for a free connection. */ if (ap_timeout_parameter_parse(val, &timeout, "ms") != APR_SUCCESS) return "Acquire timeout has wrong format"; if (timeout < 1000) return "Acquire must be at least one millisecond"; worker->s->acquire = timeout; worker->s->acquire_set = 1; } else if (!strcasecmp(key, "timeout")) { /* Connection timeout in seconds. * Defaults to server timeout. */ ival = atoi(val); if (ival < 1) return "Timeout must be at least one second"; worker->s->timeout = apr_time_from_sec(ival); worker->s->timeout_set = 1; } else if (!strcasecmp(key, "iobuffersize")) { long s = atol(val); if (s < 512 && s) { return "IOBufferSize must be >= 512 bytes, or 0 for system default."; } worker->s->io_buffer_size = (s ? s : AP_IOBUFSIZE); worker->s->io_buffer_size_set = 1; } else if (!strcasecmp(key, "receivebuffersize")) { ival = atoi(val); if (ival < 512 && ival != 0) { return "ReceiveBufferSize must be >= 512 bytes, or 0 for system default."; } worker->s->recv_buffer_size = ival; worker->s->recv_buffer_size_set = 1; } else if (!strcasecmp(key, "keepalive")) { if (!strcasecmp(val, "on")) worker->s->keepalive = 1; else if (!strcasecmp(val, "off")) worker->s->keepalive = 0; else return "KeepAlive must be On|Off"; worker->s->keepalive_set = 1; } else if (!strcasecmp(key, "disablereuse")) { if (!strcasecmp(val, "on")) worker->s->disablereuse = 1; else if (!strcasecmp(val, "off")) worker->s->disablereuse = 0; else return "DisableReuse must be On|Off"; worker->s->disablereuse_set = 1; } else if (!strcasecmp(key, "enablereuse")) { if (!strcasecmp(val, "on")) worker->s->disablereuse = 0; else if (!strcasecmp(val, "off")) worker->s->disablereuse = 1; else return "EnableReuse must be On|Off"; worker->s->disablereuse_set = 1; } else if (!strcasecmp(key, "route")) { /* Worker route. */ if (strlen(val) >= sizeof(worker->s->route)) return apr_psprintf(p, "Route length must be < %d characters", (int)sizeof(worker->s->route)); PROXY_STRNCPY(worker->s->route, val); } else if (!strcasecmp(key, "redirect")) { /* Worker redirection route. */ if (strlen(val) >= sizeof(worker->s->redirect)) return apr_psprintf(p, "Redirect length must be < %d characters", (int)sizeof(worker->s->redirect)); PROXY_STRNCPY(worker->s->redirect, val); } else if (!strcasecmp(key, "status")) { const char *v; int mode = 1; apr_status_t rv; /* Worker status. */ for (v = val; *v; v++) { if (*v == '+') { mode = 1; v++; } else if (*v == '-') { mode = 0; v++; } rv = ap_proxy_set_wstatus(*v, mode, worker); if (rv != APR_SUCCESS) return "Unknown status parameter option"; } } else if (!strcasecmp(key, "flushpackets")) { if (!strcasecmp(val, "on")) worker->s->flush_packets = flush_on; else if (!strcasecmp(val, "off")) worker->s->flush_packets = flush_off; else if (!strcasecmp(val, "auto")) worker->s->flush_packets = flush_auto; else return "flushpackets must be on|off|auto"; } else if (!strcasecmp(key, "flushwait")) { ival = atoi(val); if (ival > 1000 || ival < 0) { return "flushwait must be <= 1000, or 0 for system default of 10 millseconds."; } if (ival == 0) worker->s->flush_wait = PROXY_FLUSH_WAIT; else worker->s->flush_wait = ival * 1000; /* change to microseconds */ } else if (!strcasecmp(key, "ping")) { /* Ping/Pong timeout in given unit (default is second). */ if (ap_timeout_parameter_parse(val, &timeout, "s") != APR_SUCCESS) return "Ping/Pong timeout has wrong format"; if (timeout < 1000) return "Ping/Pong timeout must be at least one millisecond"; worker->s->ping_timeout = timeout; worker->s->ping_timeout_set = 1; } else if (!strcasecmp(key, "lbset")) { ival = atoi(val); if (ival < 0 || ival > 99) return "lbset must be between 0 and 99"; worker->s->lbset = ival; } else if (!strcasecmp(key, "connectiontimeout")) { /* Request timeout in given unit (default is second). * Defaults to connection timeout */ if (ap_timeout_parameter_parse(val, &timeout, "s") != APR_SUCCESS) return "Connectiontimeout has wrong format"; if (timeout < 1000) return "Connectiontimeout must be at least one millisecond."; worker->s->conn_timeout = timeout; worker->s->conn_timeout_set = 1; } else if (!strcasecmp(key, "flusher")) { if (PROXY_STRNCPY(worker->s->flusher, val) != APR_SUCCESS) { return apr_psprintf(p, "flusher name length must be < %d characters", (int)sizeof(worker->s->flusher)); } } else if (!strcasecmp(key, "upgrade")) { if (PROXY_STRNCPY(worker->s->upgrade, strcasecmp(val, "ANY") ? val : "*") != APR_SUCCESS) { return apr_psprintf(p, "upgrade protocol length must be < %d characters", (int)sizeof(worker->s->upgrade)); } } else if (!strcasecmp(key, "responsefieldsize")) { long s = atol(val); if (s < 0) { return "ResponseFieldSize must be greater than 0 bytes, or 0 for system default."; } worker->s->response_field_size = (s ? s : HUGE_STRING_LEN); worker->s->response_field_size_set = 1; } else if (!strcasecmp(key, "secret")) { if (PROXY_STRNCPY(worker->s->secret, val) != APR_SUCCESS) { return apr_psprintf(p, "Secret length must be < %d characters", (int)sizeof(worker->s->secret)); } } else { if (set_worker_hc_param_f) { return set_worker_hc_param_f(p, s, worker, key, val, NULL); } else { return "unknown Worker parameter"; } } return NULL; } static const char *set_balancer_param(proxy_server_conf *conf, apr_pool_t *p, proxy_balancer *balancer, const char *key, const char *val) { int ival; if (!strcasecmp(key, "stickysession")) { char *path; /* Balancer sticky session name. * Set to something like JSESSIONID or * PHPSESSIONID, etc.., */ if (strlen(val) >= sizeof(balancer->s->sticky_path)) apr_psprintf(p, "stickysession length must be < %d characters", (int)sizeof(balancer->s->sticky_path)); PROXY_STRNCPY(balancer->s->sticky_path, val); PROXY_STRNCPY(balancer->s->sticky, val); if ((path = strchr((char *)balancer->s->sticky, '|'))) { *path++ = '\0'; PROXY_STRNCPY(balancer->s->sticky_path, path); } } else if (!strcasecmp(key, "stickysessionsep")) { /* separator/delimiter for sessionid and route, * normally '.' */ if (strlen(val) != 1) { if (!strcasecmp(val, "off")) balancer->s->sticky_separator = 0; else return "stickysessionsep must be a single character or Off"; } else balancer->s->sticky_separator = *val; balancer->s->sticky_separator_set = 1; } else if (!strcasecmp(key, "nofailover")) { /* If set to 'on' the session will break * if the worker is in error state or * disabled. */ if (!strcasecmp(val, "on")) balancer->s->sticky_force = 1; else if (!strcasecmp(val, "off")) balancer->s->sticky_force = 0; else return "failover must be On|Off"; balancer->s->sticky_force_set = 1; } else if (!strcasecmp(key, "timeout")) { /* Balancer timeout in seconds. * If set this will be the maximum time to * wait for a free worker. * Default is not to wait. */ ival = atoi(val); if (ival < 1) return "timeout must be at least one second"; balancer->s->timeout = apr_time_from_sec(ival); } else if (!strcasecmp(key, "maxattempts")) { /* Maximum number of failover attempts before * giving up. */ ival = atoi(val); if (ival < 0) return "maximum number of attempts must be a positive number"; balancer->s->max_attempts = ival; balancer->s->max_attempts_set = 1; } else if (!strcasecmp(key, "lbmethod")) { proxy_balancer_method *provider; if (strlen(val) > (sizeof(balancer->s->lbpname)-1)) return "unknown lbmethod"; provider = ap_lookup_provider(PROXY_LBMETHOD, val, "0"); if (provider) { balancer->lbmethod = provider; if (PROXY_STRNCPY(balancer->s->lbpname, val) == APR_SUCCESS) { balancer->lbmethod_set = 1; return NULL; } else { return "lbmethod name too large"; } } return "unknown lbmethod"; } else if (!strcasecmp(key, "scolonpathdelim")) { /* If set to 'on' then ';' will also be * used as a session path separator/delim (ala * mod_jk) */ if (!strcasecmp(val, "on")) balancer->s->scolonsep = 1; else if (!strcasecmp(val, "off")) balancer->s->scolonsep = 0; else return "scolonpathdelim must be On|Off"; balancer->s->scolonsep_set = 1; } else if (!strcasecmp(key, "failonstatus")) { char *val_split; char *status; char *tok_state; val_split = apr_pstrdup(p, val); balancer->errstatuses = apr_array_make(p, 1, sizeof(int)); status = apr_strtok(val_split, ", ", &tok_state); while (status != NULL) { ival = atoi(status); if (ap_is_HTTP_VALID_RESPONSE(ival)) { *(int *)apr_array_push(balancer->errstatuses) = ival; } else { return "failonstatus must be one or more HTTP response codes"; } status = apr_strtok(NULL, ", ", &tok_state); } } else if (!strcasecmp(key, "failontimeout")) { if (!strcasecmp(val, "on")) balancer->failontimeout = 1; else if (!strcasecmp(val, "off")) balancer->failontimeout = 0; else return "failontimeout must be On|Off"; balancer->failontimeout_set = 1; } else if (!strcasecmp(key, "nonce")) { if (!strcasecmp(val, "None")) { *balancer->s->nonce = '\0'; } else { if (PROXY_STRNCPY(balancer->s->nonce, val) != APR_SUCCESS) { return "Provided nonce is too large"; } } balancer->s->nonce_set = 1; } else if (!strcasecmp(key, "growth")) { ival = atoi(val); if (ival < 1 || ival > 100) /* arbitrary limit here */ return "growth must be between 1 and 100"; balancer->growth = ival; balancer->growth_set = 1; } else if (!strcasecmp(key, "forcerecovery")) { if (!strcasecmp(val, "on")) balancer->s->forcerecovery = 1; else if (!strcasecmp(val, "off")) balancer->s->forcerecovery = 0; else return "forcerecovery must be On|Off"; balancer->s->forcerecovery_set = 1; } else { return "unknown Balancer parameter"; } return NULL; } static int alias_match(const char *uri, const char *alias_fakename) { const char *end_fakename = alias_fakename + strlen(alias_fakename); const char *aliasp = alias_fakename, *urip = uri; const char *end_uri = uri + strlen(uri); while (aliasp < end_fakename && urip < end_uri) { if (*aliasp == '/') { /* any number of '/' in the alias matches any number in * the supplied URI, but there must be at least one... */ if (*urip != '/') return 0; while (*aliasp == '/') ++aliasp; while (*urip == '/') ++urip; } else { /* Other characters are compared literally */ if (*urip++ != *aliasp++) return 0; } } /* fixup badly encoded stuff (e.g. % as last character) */ if (aliasp > end_fakename) { aliasp = end_fakename; } if (urip > end_uri) { urip = end_uri; } /* We reach the end of the uri before the end of "alias_fakename" * for example uri is "/" and alias_fakename "/examples" */ if (urip == end_uri && aliasp != end_fakename) { return 0; } /* Check last alias path component matched all the way */ if (aliasp[-1] != '/' && *urip != '\0' && *urip != '/') return 0; /* Return number of characters from URI which matched (may be * greater than length of alias, since we may have matched * doubled slashes) */ return urip - uri; } /* * Inspired by mod_jk's jk_servlet_normalize(). */ static int alias_match_servlet(apr_pool_t *p, const char **urip, const char *alias) { char *map; const char *uri = *urip; apr_array_header_t *stack; int map_pos, uri_pos, alias_pos, first_pos; int alias_depth = 0, depth; /* Both uri and alias should start with '/' */ if (uri[0] != '/' || alias[0] != '/') { return 0; } stack = apr_array_make(p, 5, sizeof(int)); map = apr_palloc(p, strlen(uri) + 1); map[0] = '/'; map[1] = '\0'; map_pos = uri_pos = alias_pos = first_pos = 1; while (uri[uri_pos] != '\0') { /* Remove path parameters ;foo=bar/ from any path segment */ if (uri[uri_pos] == ';') { do { uri_pos++; } while (uri[uri_pos] != '/' && uri[uri_pos] != '\0'); continue; } if (map[map_pos - 1] == '/') { /* Collapse ///// sequences to / */ if (uri[uri_pos] == '/') { do { uri_pos++; } while (uri[uri_pos] == '/'); continue; } if (uri[uri_pos] == '.') { /* Remove /./ segments */ if (uri[uri_pos + 1] == '/' || uri[uri_pos + 1] == ';' || uri[uri_pos + 1] == '\0') { uri_pos++; if (uri[uri_pos] == '/') { uri_pos++; } continue; } /* Remove /xx/../ segments */ if (uri[uri_pos + 1] == '.' && (uri[uri_pos + 2] == '/' || uri[uri_pos + 2] == ';' || uri[uri_pos + 2] == '\0')) { /* Wind map segment back the previous one */ if (map_pos == 1) { /* Above root */ return 0; } do { map_pos--; } while (map[map_pos - 1] != '/'); map[map_pos] = '\0'; /* Wind alias segment back, unless in deeper segment */ if (alias_depth == stack->nelts) { if (alias[alias_pos] == '\0') { alias_pos--; } while (alias_pos > 0 && alias[alias_pos] == '/') { alias_pos--; } while (alias_pos > 0 && alias[alias_pos - 1] != '/') { alias_pos--; } AP_DEBUG_ASSERT(alias_pos > 0); alias_depth--; } apr_array_pop(stack); /* Move uri forward to the next segment */ uri_pos += 2; if (uri[uri_pos] == '/') { uri_pos++; } first_pos = 0; continue; } } if (first_pos) { while (uri[first_pos] == '/') { first_pos++; } } /* New segment */ APR_ARRAY_PUSH(stack, int) = first_pos ? first_pos : uri_pos; if (alias[alias_pos] != '\0') { if (alias[alias_pos - 1] != '/') { /* Remain in pair with uri segments */ do { alias_pos++; } while (alias[alias_pos - 1] != '/' && alias[alias_pos]); } while (alias[alias_pos] == '/') { alias_pos++; } if (alias[alias_pos] != '\0') { alias_depth++; } } } if (alias[alias_pos] != '\0') { int *match = &APR_ARRAY_IDX(stack, alias_depth - 1, int); if (*match) { if (alias[alias_pos] != uri[uri_pos]) { /* Current segment does not match */ *match = 0; } else if (alias[alias_pos + 1] == '\0' && alias[alias_pos] != '/') { if (uri[uri_pos + 1] == ';') { /* We'll preserve the parameters of the last * segment if it does not end with '/', so mark * the match as negative for below handling. */ *match = -(uri_pos + 1); } else if (uri[uri_pos + 1] != '/' && uri[uri_pos + 1] != '\0') { /* Last segment does not match all the way */ *match = 0; } } } /* Don't go past the segment if the uri isn't there yet */ if (alias[alias_pos] != '/' || uri[uri_pos] == '/') { alias_pos++; } } if (uri[uri_pos] == '/') { first_pos = uri_pos + 1; } map[map_pos++] = uri[uri_pos++]; map[map_pos] = '\0'; } /* Can't reach the end of uri before the end of the alias, * for example if uri is "/" and alias is "/examples" */ if (alias[alias_pos] != '\0') { return 0; } /* Check whether each alias segment matched */ for (depth = 0; depth < alias_depth; ++depth) { if (!APR_ARRAY_IDX(stack, depth, int)) { return 0; } } /* If alias_depth == stack->nelts we have a full match, i.e. * uri == alias so we can return uri_pos as is (the end of uri) */ if (alias_depth < stack->nelts) { /* Return the segment following the alias */ uri_pos = APR_ARRAY_IDX(stack, alias_depth, int); if (alias_depth) { /* But if the last segment of the alias does not end with '/' * and the corresponding segment of the uri has parameters, * we want to forward those parameters (see above for the * negative pos trick/mark). */ int pos = APR_ARRAY_IDX(stack, alias_depth - 1, int); if (pos < 0) { uri_pos = -pos; } } } /* If the alias lacks a trailing slash, take it from the uri (if any) */ if (alias[alias_pos - 1] != '/' && uri[uri_pos - 1] == '/') { uri_pos--; } *urip = map; return uri_pos; } /* Detect if an absoluteURI should be proxied or not. Note that we * have to do this during this phase because later phases are * "short-circuiting"... i.e. translate_names will end when the first * module returns OK. So for example, if the request is something like: * * GET http://othervhost/cgi-bin/printenv HTTP/1.0 * * mod_alias will notice the /cgi-bin part and ScriptAlias it and * short-circuit the proxy... just because of the ordering in the * configuration file. */ static int proxy_detect(request_rec *r) { void *sconf = r->server->module_config; proxy_server_conf *conf = (proxy_server_conf *) ap_get_module_config(sconf, &proxy_module); /* Ick... msvc (perhaps others) promotes ternary short results to int */ if (conf->req && r->parsed_uri.scheme) { /* but it might be something vhosted */ if (!r->parsed_uri.hostname || ap_cstr_casecmp(r->parsed_uri.scheme, ap_http_scheme(r)) != 0 || !ap_matches_request_vhost(r, r->parsed_uri.hostname, (apr_port_t)(r->parsed_uri.port_str ? r->parsed_uri.port : ap_default_port(r)))) { r->proxyreq = PROXYREQ_PROXY; r->uri = r->unparsed_uri; r->filename = apr_pstrcat(r->pool, "proxy:", r->uri, NULL); r->handler = "proxy-server"; } } /* We need special treatment for CONNECT proxying: it has no scheme part */ else if (conf->req && r->method_number == M_CONNECT && r->parsed_uri.hostname && r->parsed_uri.port_str) { r->proxyreq = PROXYREQ_PROXY; r->uri = r->unparsed_uri; r->filename = apr_pstrcat(r->pool, "proxy:", r->uri, NULL); r->handler = "proxy-server"; } return DECLINED; } static const char *proxy_interpolate(request_rec *r, const char *str) { /* Interpolate an env str in a configuration string * Syntax ${var} --> value_of(var) * Method: replace one var, and recurse on remainder of string * Nothing clever here, and crap like nested vars may do silly things * but we'll at least avoid sending the unwary into a loop */ const char *start; const char *end; const char *var; const char *val; const char *firstpart; start = ap_strstr_c(str, "${"); if (start == NULL) { return str; } end = ap_strchr_c(start+2, '}'); if (end == NULL) { return str; } /* OK, this is syntax we want to interpolate. Is there such a var ? */ var = apr_pstrmemdup(r->pool, start+2, end-(start+2)); val = apr_table_get(r->subprocess_env, var); firstpart = apr_pstrmemdup(r->pool, str, (start-str)); if (val == NULL) { return apr_pstrcat(r->pool, firstpart, proxy_interpolate(r, end+1), NULL); } else { return apr_pstrcat(r->pool, firstpart, val, proxy_interpolate(r, end+1), NULL); } } static apr_array_header_t *proxy_vars(request_rec *r, apr_array_header_t *hdr) { int i; apr_array_header_t *ret = apr_array_make(r->pool, hdr->nelts, sizeof (struct proxy_alias)); struct proxy_alias *old = (struct proxy_alias *) hdr->elts; for (i = 0; i < hdr->nelts; ++i) { struct proxy_alias *newcopy = apr_array_push(ret); newcopy->fake = (old[i].flags & PROXYPASS_INTERPOLATE) ? proxy_interpolate(r, old[i].fake) : old[i].fake; newcopy->real = (old[i].flags & PROXYPASS_INTERPOLATE) ? proxy_interpolate(r, old[i].real) : old[i].real; } return ret; } PROXY_DECLARE(int) ap_proxy_trans_match(request_rec *r, struct proxy_alias *ent, proxy_dir_conf *dconf) { int len; const char *fake; const char *real; ap_regmatch_t regm[AP_MAX_REG_MATCH]; ap_regmatch_t reg1[AP_MAX_REG_MATCH]; char *found = NULL; int mismatch = 0; unsigned int nocanon = ent->flags & PROXYPASS_NOCANON; const char *use_uri = nocanon ? r->unparsed_uri : r->uri; const char *servlet_uri = NULL; if (dconf && (dconf->interpolate_env == 1) && (ent->flags & PROXYPASS_INTERPOLATE)) { fake = proxy_interpolate(r, ent->fake); real = proxy_interpolate(r, ent->real); } else { fake = ent->fake; real = ent->real; } ap_log_rerror(APLOG_MARK, APLOG_TRACE2, 0, r, APLOGNO(03461) "attempting to match URI path '%s' against %s '%s' for " "proxying", r->uri, (ent->regex ? "pattern" : "prefix"), fake); if (ent->regex) { if (!ap_regexec(ent->regex, r->uri, AP_MAX_REG_MATCH, regm, 0)) { if ((real[0] == '!') && (real[1] == '\0')) { ap_log_rerror(APLOG_MARK, APLOG_TRACE1, 0, r, APLOGNO(03462) "proxying is explicitly disabled for URI path " "'%s'; declining", r->uri); return DECLINED; } /* test that we haven't reduced the URI */ if (nocanon && ap_regexec(ent->regex, r->unparsed_uri, AP_MAX_REG_MATCH, reg1, 0)) { mismatch = 1; use_uri = r->uri; } found = ap_pregsub(r->pool, real, use_uri, AP_MAX_REG_MATCH, (use_uri == r->uri) ? regm : reg1); if (!found) { ap_log_rerror(APLOG_MARK, APLOG_CRIT, 0, r, APLOGNO(01135) "Substitution in regular expression failed. " "Replacement too long?"); return HTTP_INTERNAL_SERVER_ERROR; } /* Note: The strcmp() below catches cases where there * was no regex substitution. This is so cases like: * * ProxyPassMatch \.gif balancer://foo * * will work "as expected". The upshot is that the 2 * directives below act the exact same way (ie: $1 is implied): * * ProxyPassMatch ^(/.*\.gif)$ balancer://foo * ProxyPassMatch ^(/.*\.gif)$ balancer://foo$1 * * which may be confusing. */ if (strcmp(found, real) != 0) { found = apr_pstrcat(r->pool, "proxy:", found, NULL); } else { found = apr_pstrcat(r->pool, "proxy:", real, use_uri, NULL); } } } else { if ((ent->flags & PROXYPASS_MAP_SERVLET) == PROXYPASS_MAP_SERVLET) { servlet_uri = r->uri; len = alias_match_servlet(r->pool, &servlet_uri, fake); nocanon = 0; /* ignored since servlet's normalization applies */ } else { len = alias_match(r->uri, fake); } if (len != 0) { if ((real[0] == '!') && (real[1] == '\0')) { ap_log_rerror(APLOG_MARK, APLOG_TRACE1, 0, r, APLOGNO(03463) "proxying is explicitly disabled for URI path " "'%s'; declining", r->uri); return DECLINED; } if (nocanon && len != alias_match(r->unparsed_uri, fake)) { mismatch = 1; use_uri = r->uri; } found = apr_pstrcat(r->pool, "proxy:", real, use_uri + len, NULL); } } if (mismatch) { /* We made a reducing transformation, so we can't safely use * unparsed_uri. Safe fallback is to ignore nocanon. */ ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(01136) "Unescaped URL path matched ProxyPass; ignoring unsafe nocanon"); } if (found) { unsigned int encoded = ent->flags & PROXYPASS_MAP_ENCODED; /* A proxy module is assigned this URL, check whether it's interested * in the request itself (e.g. proxy_wstunnel cares about Upgrade * requests only, and could hand over to proxy_http otherwise). */ int rc = proxy_run_check_trans(r, found + 6); if (rc != OK && rc != DECLINED) { return HTTP_CONTINUE; } r->filename = found; r->handler = "proxy-server"; r->proxyreq = PROXYREQ_REVERSE; if (nocanon && !mismatch) { /* mod_proxy_http needs to be told. Different module. */ apr_table_setn(r->notes, "proxy-nocanon", "1"); } if (ent->flags & PROXYPASS_NOQUERY) { apr_table_setn(r->notes, "proxy-noquery", "1"); } if (encoded) { apr_table_setn(r->notes, "proxy-noencode", "1"); } if (servlet_uri) { ap_log_rerror(APLOG_MARK, APLOG_TRACE1, 0, r, APLOGNO(10248) "Servlet path '%s' (%s) matches proxy handler '%s'", r->uri, servlet_uri, found); /* Apply servlet normalization to r->uri so that <Location> or any * directory context match does not have to handle path parameters. * We change r->uri in-place so that r->parsed_uri.path is updated * too. Since normalized servlet_uri is necessarily shorter than * the original r->uri, strcpy() is fine. */ AP_DEBUG_ASSERT(strlen(r->uri) >= strlen(servlet_uri)); strcpy(r->uri, servlet_uri); } else { ap_log_rerror(APLOG_MARK, APLOG_TRACE1, 0, r, APLOGNO(03464) "URI path '%s' matches proxy handler '%s'", r->uri, found); } return (encoded) ? DONE : OK; } return HTTP_CONTINUE; } static int proxy_trans(request_rec *r, int pre_trans) { int i, enc; struct proxy_alias *ent; proxy_dir_conf *dconf; proxy_server_conf *conf; if (r->proxyreq) { /* someone has already set up the proxy, it was possibly ourselves * in proxy_detect (DONE will prevent further decoding of r->uri, * only if proxyreq is set before pre_trans already). */ return pre_trans ? DONE : OK; } /* In early pre_trans hook, r->uri was not manipulated yet so we are * compliant with RFC1945 at this point. Otherwise, it probably isn't * an issue because this is a hybrid proxy/origin server. */ dconf = ap_get_module_config(r->per_dir_config, &proxy_module); conf = (proxy_server_conf *) ap_get_module_config(r->server->module_config, &proxy_module); /* Always and only do PROXY_MAP_ENCODED mapping in pre_trans, when * r->uri is still encoded, or we might consider for instance that * a decoded sub-delim is now a delimiter (e.g. "%3B" => ';' for * path parameters), which it's not. */ if ((pre_trans && !conf->map_encoded_one) || (!pre_trans && conf->map_encoded_all)) { /* Fast path, nothing at this stage */ return DECLINED; } if ((r->unparsed_uri[0] == '*' && r->unparsed_uri[1] == '\0') || !r->uri || r->uri[0] != '/') { return DECLINED; } if (apr_table_get(r->subprocess_env, "no-proxy")) { return DECLINED; } /* short way - this location is reverse proxied? */ if (dconf->alias) { enc = (dconf->alias->flags & PROXYPASS_MAP_ENCODED) != 0; if (!(pre_trans ^ enc)) { int rv = ap_proxy_trans_match(r, dconf->alias, dconf); if (rv != HTTP_CONTINUE) { return rv; } } } /* long way - walk the list of aliases, find a match */ for (i = 0; i < conf->aliases->nelts; i++) { ent = &((struct proxy_alias *)conf->aliases->elts)[i]; enc = (ent->flags & PROXYPASS_MAP_ENCODED) != 0; if (!(pre_trans ^ enc)) { int rv = ap_proxy_trans_match(r, ent, dconf); if (rv != HTTP_CONTINUE) { return rv; } } } return DECLINED; } static int proxy_pre_translate_name(request_rec *r) { return proxy_trans(r, 1); } static int proxy_translate_name(request_rec *r) { return proxy_trans(r, 0); } static int proxy_walk(request_rec *r) { proxy_server_conf *sconf = ap_get_module_config(r->server->module_config, &proxy_module); ap_conf_vector_t *per_dir_defaults = r->per_dir_config; ap_conf_vector_t **sec_proxy = (ap_conf_vector_t **) sconf->sec_proxy->elts; ap_conf_vector_t *entry_config; proxy_dir_conf *entry_proxy; int num_sec = sconf->sec_proxy->nelts; /* XXX: shouldn't we use URI here? Canonicalize it first? * Pass over "proxy:" prefix */ const char *proxyname = r->filename + 6; int j; apr_pool_t *rxpool = NULL; for (j = 0; j < num_sec; ++j) { int nmatch = 0; int i; ap_regmatch_t *pmatch = NULL; entry_config = sec_proxy[j]; entry_proxy = ap_get_module_config(entry_config, &proxy_module); if (entry_proxy->r) { if (entry_proxy->refs && entry_proxy->refs->nelts) { if (!rxpool) { apr_pool_create(&rxpool, r->pool); apr_pool_tag(rxpool, "proxy_rxpool"); } nmatch = entry_proxy->refs->nelts; pmatch = apr_palloc(rxpool, nmatch*sizeof(ap_regmatch_t)); } if (ap_regexec(entry_proxy->r, proxyname, nmatch, pmatch, 0)) { continue; } for (i = 0; i < nmatch; i++) { if (pmatch[i].rm_so >= 0 && pmatch[i].rm_eo >= 0 && ((const char **)entry_proxy->refs->elts)[i]) { apr_table_setn(r->subprocess_env, ((const char **)entry_proxy->refs->elts)[i], apr_pstrndup(r->pool, proxyname + pmatch[i].rm_so, pmatch[i].rm_eo - pmatch[i].rm_so)); } } } else if ( /* XXX: What about case insensitive matching ??? * Compare regex, fnmatch or string as appropriate * If the entry doesn't relate, then continue */ entry_proxy->p_is_fnmatch ? apr_fnmatch(entry_proxy->p, proxyname, 0) : strncmp(proxyname, entry_proxy->p, strlen(entry_proxy->p))) { continue; } per_dir_defaults = ap_merge_per_dir_configs(r->pool, per_dir_defaults, entry_config); } r->per_dir_config = per_dir_defaults; if (rxpool) { apr_pool_destroy(rxpool); } return OK; } static int proxy_map_location(request_rec *r) { int access_status; if (!r->proxyreq || !r->filename || strncmp(r->filename, "proxy:", 6) != 0) return DECLINED; /* Don't let the core or mod_http map_to_storage hooks handle this, * We don't need directory/file_walk, and we want to TRACE on our own. */ if ((access_status = proxy_walk(r))) { ap_die(access_status, r); return access_status; } return OK; } /* -------------------------------------------------------------- */ /* Fixup the filename */ /* * Canonicalise the URL */ static int proxy_fixup(request_rec *r) { char *url, *p; int access_status; proxy_dir_conf *dconf = ap_get_module_config(r->per_dir_config, &proxy_module); if (!r->proxyreq || !r->filename || strncmp(r->filename, "proxy:", 6) != 0) return DECLINED; /* XXX: Shouldn't we try this before we run the proxy_walk? */ url = &r->filename[6]; if ((dconf->interpolate_env == 1) && (r->proxyreq == PROXYREQ_REVERSE)) { /* create per-request copy of reverse proxy conf, * and interpolate vars in it */ proxy_req_conf *rconf = apr_palloc(r->pool, sizeof(proxy_req_conf)); ap_set_module_config(r->request_config, &proxy_module, rconf); rconf->raliases = proxy_vars(r, dconf->raliases); rconf->cookie_paths = proxy_vars(r, dconf->cookie_paths); rconf->cookie_domains = proxy_vars(r, dconf->cookie_domains); } /* canonicalise each specific scheme */ if ((access_status = proxy_run_canon_handler(r, url))) { return access_status; } p = strchr(url, ':'); if (p == NULL || p == url) return HTTP_BAD_REQUEST; return OK; /* otherwise; we've done the best we can */ } /* Send a redirection if the request contains a hostname which is not */ /* fully qualified, i.e. doesn't have a domain name appended. Some proxy */ /* servers like Netscape's allow this and access hosts from the local */ /* domain in this case. I think it is better to redirect to a FQDN, since */ /* these will later be found in the bookmarks files. */ /* The "ProxyDomain" directive determines what domain will be appended */ static int proxy_needsdomain(request_rec *r, const char *url, const char *domain) { char *nuri; const char *ref; /* We only want to worry about GETs */ if (!r->proxyreq || r->method_number != M_GET || !r->parsed_uri.hostname) return DECLINED; /* If host does contain a dot already, or it is "localhost", decline */ if (strchr(r->parsed_uri.hostname, '.') != NULL /* has domain, or IPv4 literal */ || strchr(r->parsed_uri.hostname, ':') != NULL /* IPv6 literal */ || ap_cstr_casecmp(r->parsed_uri.hostname, "localhost") == 0) return DECLINED; /* host name has a dot already */ ref = apr_table_get(r->headers_in, "Referer"); /* Reassemble the request, but insert the domain after the host name */ /* Note that the domain name always starts with a dot */ r->parsed_uri.hostname = apr_pstrcat(r->pool, r->parsed_uri.hostname, domain, NULL); nuri = apr_uri_unparse(r->pool, &r->parsed_uri, APR_URI_UNP_REVEALPASSWORD); apr_table_setn(r->headers_out, "Location", nuri); ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(01138) "Domain missing: %s sent to %s%s%s", r->uri, apr_uri_unparse(r->pool, &r->parsed_uri, APR_URI_UNP_OMITUSERINFO), ref ? " from " : "", ref ? ref : ""); return HTTP_MOVED_PERMANENTLY; } /* -------------------------------------------------------------- */ /* Invoke handler */ static int proxy_handler(request_rec *r) { char *uri, *scheme, *p; const char *p2; void *sconf = r->server->module_config; proxy_server_conf *conf = (proxy_server_conf *) ap_get_module_config(sconf, &proxy_module); apr_array_header_t *proxies = conf->proxies; struct proxy_remote *ents = (struct proxy_remote *) proxies->elts; int i, rc, access_status; int direct_connect = 0; const char *str; apr_int64_t maxfwd; proxy_balancer *balancer = NULL; proxy_worker *worker = NULL; int attempts = 0, max_attempts = 0; struct dirconn_entry *list = (struct dirconn_entry *)conf->dirconn->elts; int saved_status; /* is this for us? */ if (!r->filename) { return DECLINED; } if (!r->proxyreq) { /* We may have forced the proxy handler via config or .htaccess */ if (r->handler && strncmp(r->handler, "proxy:", 6) == 0 && strncmp(r->filename, "proxy:", 6) != 0) { r->proxyreq = PROXYREQ_REVERSE; r->filename = apr_pstrcat(r->pool, r->handler, r->filename, NULL); } else { return DECLINED; } } else if (strncmp(r->filename, "proxy:", 6) != 0) { return DECLINED; } /* handle max-forwards / OPTIONS / TRACE */ if ((str = apr_table_get(r->headers_in, "Max-Forwards"))) { char *end; maxfwd = apr_strtoi64(str, &end, 10); if (maxfwd < 0 || maxfwd == APR_INT64_MAX || *end) { ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(10188) "Max-Forwards value '%s' could not be parsed", str); return ap_proxyerror(r, HTTP_BAD_REQUEST, "Max-Forwards request header could not be parsed"); } else if (maxfwd == 0) { switch (r->method_number) { case M_TRACE: { int access_status; r->proxyreq = PROXYREQ_NONE; access_status = ap_send_http_trace(r); ap_die(access_status, r); return OK; } case M_OPTIONS: { int access_status; r->proxyreq = PROXYREQ_NONE; access_status = ap_send_http_options(r); ap_die(access_status, r); return OK; } default: { return ap_proxyerror(r, HTTP_BAD_REQUEST, "Max-Forwards has reached zero - proxy loop?"); } } } maxfwd = (maxfwd > 0) ? maxfwd - 1 : 0; } else { /* set configured max-forwards */ maxfwd = conf->maxfwd; } if (maxfwd >= 0) { apr_table_setn(r->headers_in, "Max-Forwards", apr_psprintf(r->pool, "%" APR_INT64_T_FMT, maxfwd)); } if (r->method_number == M_TRACE) { core_server_config *coreconf = (core_server_config *) ap_get_core_module_config(sconf); if (coreconf->trace_enable == AP_TRACE_DISABLE) { /* Allow "error-notes" string to be printed by ap_send_error_response() * Note; this goes nowhere, canned error response need an overhaul. */ apr_table_setn(r->notes, "error-notes", "TRACE forbidden by server configuration"); apr_table_setn(r->notes, "verbose-error-to", "*"); ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01139) "TRACE forbidden by server configuration"); return HTTP_METHOD_NOT_ALLOWED; } /* Can't test ap_should_client_block, we aren't ready to send * the client a 100 Continue response till the connection has * been established */ if (coreconf->trace_enable != AP_TRACE_EXTENDED && (r->read_length || r->read_chunked || r->remaining)) { /* Allow "error-notes" string to be printed by ap_send_error_response() * Note; this goes nowhere, canned error response need an overhaul. */ apr_table_setn(r->notes, "error-notes", "TRACE with request body is not allowed"); apr_table_setn(r->notes, "verbose-error-to", "*"); ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01140) "TRACE with request body is not allowed"); return HTTP_REQUEST_ENTITY_TOO_LARGE; } } uri = r->filename + 6; p = strchr(uri, ':'); if (p == NULL) { ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01141) "proxy_handler no URL in %s", r->filename); return HTTP_BAD_REQUEST; } /* If the host doesn't have a domain name, add one and redirect. */ if (conf->domain != NULL) { rc = proxy_needsdomain(r, uri, conf->domain); if (ap_is_HTTP_REDIRECT(rc)) return HTTP_MOVED_PERMANENTLY; } scheme = apr_pstrmemdup(r->pool, uri, p - uri); /* Check URI's destination host against NoProxy hosts */ /* Bypass ProxyRemote server lookup if configured as NoProxy */ for (direct_connect = i = 0; i < conf->dirconn->nelts && !direct_connect; i++) { direct_connect = list[i].matcher(&list[i], r); } #if DEBUGGING ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, (direct_connect) ? APLOGNO(03231) "NoProxy for %s" : APLOGNO(03232) "UseProxy for %s", r->uri); #endif do { char *url = uri; /* Try to obtain the most suitable worker */ access_status = ap_proxy_pre_request(&worker, &balancer, r, conf, &url); if (access_status != OK) { /* * Only return if access_status is not HTTP_SERVICE_UNAVAILABLE * This gives other modules the chance to hook into the * request_status hook and decide what to do in this situation. */ if (access_status != HTTP_SERVICE_UNAVAILABLE) return access_status; /* * Ensure that balancer is NULL if worker is NULL to prevent * potential problems in the post_request hook. */ if (!worker) balancer = NULL; goto cleanup; } /* Initialise worker if needed, note the shared area must be initialized by the balancer logic */ if (balancer) { ap_proxy_initialize_worker(worker, r->server, conf->pool); } if (balancer && balancer->s->max_attempts_set && !max_attempts) max_attempts = balancer->s->max_attempts; /* firstly, try a proxy, unless a NoProxy directive is active */ if (!direct_connect) { for (i = 0; i < proxies->nelts; i++) { p2 = ap_strchr_c(ents[i].scheme, ':'); /* is it a partial URL? */ if (strcmp(ents[i].scheme, "*") == 0 || (ents[i].use_regex && ap_regexec(ents[i].regexp, url, 0, NULL, 0) == 0) || (p2 == NULL && ap_cstr_casecmp(scheme, ents[i].scheme) == 0) || (p2 != NULL && ap_cstr_casecmpn(url, ents[i].scheme, strlen(ents[i].scheme)) == 0)) { /* handle the scheme */ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01142) "Trying to run scheme_handler against proxy"); access_status = proxy_run_scheme_handler(r, worker, conf, url, ents[i].hostname, ents[i].port); /* Did the scheme handler process the request? */ if (access_status != DECLINED) { const char *cl_a; apr_off_t cl; /* * An fatal error or success, so no point in * retrying with a direct connection. */ if (access_status != HTTP_BAD_GATEWAY) { goto cleanup; } cl_a = apr_table_get(r->headers_in, "Content-Length"); if (cl_a && (!ap_parse_strict_length(&cl, cl_a) || cl > 0)) { /* * The request body is of length > 0. We cannot * retry with a direct connection since we already * sent (parts of) the request body to the proxy * and do not have any longer. */ goto cleanup; } /* * Transfer-Encoding was set as input header, so we had * a request body. We cannot retry with a direct * connection for the same reason as above. */ if (apr_table_get(r->headers_in, "Transfer-Encoding")) { goto cleanup; } } } } } /* otherwise, try it direct */ /* N.B. what if we're behind a firewall, where we must use a proxy or * give up?? */ /* handle the scheme */ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01143) "Running scheme %s handler (attempt %d)", scheme, attempts); AP_PROXY_RUN(r, worker, conf, url, attempts); access_status = proxy_run_scheme_handler(r, worker, conf, url, NULL, 0); if (access_status == OK || apr_table_get(r->notes, "proxy-error-override")) break; else if (access_status == HTTP_INTERNAL_SERVER_ERROR) { /* Unrecoverable server error. * We can not failover to another worker. * Mark the worker as unusable if member of load balancer */ if (balancer && !(worker->s->status & PROXY_WORKER_IGNORE_ERRORS)) { worker->s->status |= PROXY_WORKER_IN_ERROR; worker->s->error_time = apr_time_now(); } break; } else if (access_status == HTTP_SERVICE_UNAVAILABLE) { /* Recoverable server error. * We can failover to another worker * Mark the worker as unusable if member of load balancer */ if (balancer && !(worker->s->status & PROXY_WORKER_IGNORE_ERRORS)) { worker->s->status |= PROXY_WORKER_IN_ERROR; worker->s->error_time = apr_time_now(); } } else { /* Unrecoverable error. * Return the origin status code to the client. */ break; } /* Try again if the worker is unusable and the service is * unavailable. */ } while (!PROXY_WORKER_IS_USABLE(worker) && max_attempts > attempts++); if (DECLINED == access_status) { ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(01144) "No protocol handler was valid for the URL %s " "(scheme '%s'). " "If you are using a DSO version of mod_proxy, make sure " "the proxy submodules are included in the configuration " "using LoadModule.", r->uri, scheme); access_status = HTTP_INTERNAL_SERVER_ERROR; goto cleanup; } cleanup: /* * Save current r->status and set it to the value of access_status which * might be different (e.g. r->status could be HTTP_OK if e.g. we override * the error page on the proxy or if the error was not generated by the * backend itself but by the proxy e.g. a bad gateway) in order to give * ap_proxy_post_request a chance to act correctly on the status code. * But only do the above if access_status is not OK and not DONE, because * in this case r->status might contain the true status and overwriting * it with OK or DONE would be wrong. */ if ((access_status != OK) && (access_status != DONE)) { saved_status = r->status; r->status = access_status; ap_proxy_post_request(worker, balancer, r, conf); /* * Only restore r->status if it has not been changed by * ap_proxy_post_request as we assume that this change was intentional. */ if (r->status == access_status) { r->status = saved_status; } } else { ap_proxy_post_request(worker, balancer, r, conf); } proxy_run_request_status(&access_status, r); AP_PROXY_RUN_FINISHED(r, attempts, access_status); return access_status; } /* -------------------------------------------------------------- */ /* Setup configurable data */ static void * create_proxy_config(apr_pool_t *p, server_rec *s) { proxy_server_conf *ps = apr_pcalloc(p, sizeof(proxy_server_conf)); ps->sec_proxy = apr_array_make(p, 10, sizeof(ap_conf_vector_t *)); ps->proxies = apr_array_make(p, 10, sizeof(struct proxy_remote)); ps->aliases = apr_array_make(p, 10, sizeof(struct proxy_alias)); ps->noproxies = apr_array_make(p, 10, sizeof(struct noproxy_entry)); ps->dirconn = apr_array_make(p, 10, sizeof(struct dirconn_entry)); ps->workers = apr_array_make(p, 10, sizeof(proxy_worker)); ps->balancers = apr_array_make(p, 10, sizeof(proxy_balancer)); ps->forward = NULL; ps->reverse = NULL; ps->domain = NULL; ps->map_encoded_one = 0; ps->map_encoded_all = 1; ps->id = apr_psprintf(p, "p%x", 1); /* simply for storage size */ ps->viaopt = via_off; /* initially backward compatible with 1.3.1 */ ps->viaopt_set = 0; /* 0 means default */ ps->req = 0; ps->max_balancers = 0; ps->bal_persist = 0; ps->inherit = 1; ps->inherit_set = 0; ps->ppinherit = 1; ps->ppinherit_set = 0; ps->bgrowth = 5; ps->bgrowth_set = 0; ps->req_set = 0; ps->recv_buffer_size = 0; /* this default was left unset for some reason */ ps->recv_buffer_size_set = 0; ps->io_buffer_size = AP_IOBUFSIZE; ps->io_buffer_size_set = 0; ps->maxfwd = DEFAULT_MAX_FORWARDS; ps->maxfwd_set = 0; ps->timeout = 0; ps->timeout_set = 0; ps->badopt = bad_error; ps->badopt_set = 0; ps->source_address = NULL; ps->source_address_set = 0; apr_pool_create_ex(&ps->pool, p, NULL, NULL); apr_pool_tag(ps->pool, "proxy_server_conf"); return ps; } static apr_array_header_t *merge_balancers(apr_pool_t *p, apr_array_header_t *base, apr_array_header_t *overrides) { proxy_balancer *b1; proxy_balancer *b2; proxy_balancer tmp; int x, y, found; apr_array_header_t *tocopy = apr_array_make(p, 1, sizeof(proxy_balancer)); /* Check if the balancer is defined in both override and base configs: * a) If it is, Create copy of base balancer and change the configuration * which can be changed by ProxyPass. * b) Otherwise, copy the balancer to tocopy array and merge it later. */ b1 = (proxy_balancer *) base->elts; for (y = 0; y < base->nelts; y++) { b2 = (proxy_balancer *) overrides->elts; for (x = 0, found = 0; x < overrides->nelts; x++) { if (b1->hash.def == b2->hash.def && b1->hash.fnv == b2->hash.fnv) { tmp = *b2; *b2 = *b1; b2->s = tmp.s; /* For shared memory entries, b2->s belongs to override * balancer, so if some entry is not set there, we have to * update it according to the base balancer. */ if (*b2->s->sticky == 0 && *b1->s->sticky) { PROXY_STRNCPY(b2->s->sticky_path, b1->s->sticky_path); PROXY_STRNCPY(b2->s->sticky, b1->s->sticky); } if (!b2->s->sticky_separator_set && b1->s->sticky_separator_set) { b2->s->sticky_separator_set = b1->s->sticky_separator_set; b2->s->sticky_separator = b1->s->sticky_separator; } if (!b2->s->timeout && b1->s->timeout) { b2->s->timeout = b1->s->timeout; } if (!b2->s->max_attempts_set && b1->s->max_attempts_set) { b2->s->max_attempts_set = b1->s->max_attempts_set; b2->s->max_attempts = b1->s->max_attempts; } if (!b2->s->nonce_set && b1->s->nonce_set) { b2->s->nonce_set = b1->s->nonce_set; PROXY_STRNCPY(b2->s->nonce, b1->s->nonce); } if (!b2->s->sticky_force_set && b1->s->sticky_force_set) { b2->s->sticky_force_set = b1->s->sticky_force_set; b2->s->sticky_force = b1->s->sticky_force; } if (!b2->s->scolonsep_set && b1->s->scolonsep_set) { b2->s->scolonsep_set = b1->s->scolonsep_set; b2->s->scolonsep = b1->s->scolonsep; } if (!b2->s->forcerecovery_set && b1->s->forcerecovery_set) { b2->s->forcerecovery_set = b1->s->forcerecovery_set; b2->s->forcerecovery = b1->s->forcerecovery; } /* For non-shared memory entries, b2 is copy of b1, so we have * to use tmp copy of b1 to detect changes done in override. */ if (tmp.lbmethod_set) { b2->lbmethod_set = tmp.lbmethod_set; b2->lbmethod = tmp.lbmethod; } if (tmp.growth_set) { b2->growth_set = tmp.growth_set; b2->growth = tmp.growth; } if (tmp.failontimeout_set) { b2->failontimeout_set = tmp.failontimeout_set; b2->failontimeout = tmp.failontimeout; } if (!apr_is_empty_array(tmp.errstatuses)) { apr_array_cat(tmp.errstatuses, b2->errstatuses); b2->errstatuses = tmp.errstatuses; } found = 1; break; } b2++; } if (!found) { *(proxy_balancer *)apr_array_push(tocopy) = *b1; } b1++; } return apr_array_append(p, tocopy, overrides); } static void * merge_proxy_config(apr_pool_t *p, void *basev, void *overridesv) { proxy_server_conf *ps = apr_pcalloc(p, sizeof(proxy_server_conf)); proxy_server_conf *base = (proxy_server_conf *) basev; proxy_server_conf *overrides = (proxy_server_conf *) overridesv; ps->inherit = (overrides->inherit_set == 0) ? base->inherit : overrides->inherit; ps->inherit_set = overrides->inherit_set || base->inherit_set; ps->ppinherit = (overrides->ppinherit_set == 0) ? base->ppinherit : overrides->ppinherit; ps->ppinherit_set = overrides->ppinherit_set || base->ppinherit_set; if (ps->ppinherit) { ps->proxies = apr_array_append(p, base->proxies, overrides->proxies); } else { ps->proxies = overrides->proxies; } ps->sec_proxy = apr_array_append(p, base->sec_proxy, overrides->sec_proxy); ps->aliases = apr_array_append(p, base->aliases, overrides->aliases); ps->noproxies = apr_array_append(p, base->noproxies, overrides->noproxies); ps->dirconn = apr_array_append(p, base->dirconn, overrides->dirconn); if (ps->inherit || ps->ppinherit) { ps->workers = apr_array_append(p, base->workers, overrides->workers); ps->balancers = merge_balancers(p, base->balancers, overrides->balancers); } else { ps->workers = overrides->workers; ps->balancers = overrides->balancers; } ps->forward = overrides->forward ? overrides->forward : base->forward; ps->reverse = overrides->reverse ? overrides->reverse : base->reverse; ps->map_encoded_one = overrides->map_encoded_one || base->map_encoded_one; ps->map_encoded_all = overrides->map_encoded_all && base->map_encoded_all; ps->domain = (overrides->domain == NULL) ? base->domain : overrides->domain; ps->id = (overrides->id == NULL) ? base->id : overrides->id; ps->viaopt = (overrides->viaopt_set == 0) ? base->viaopt : overrides->viaopt; ps->viaopt_set = overrides->viaopt_set || base->viaopt_set; ps->req = (overrides->req_set == 0) ? base->req : overrides->req; ps->req_set = overrides->req_set || base->req_set; ps->bgrowth = (overrides->bgrowth_set == 0) ? base->bgrowth : overrides->bgrowth; ps->bgrowth_set = overrides->bgrowth_set || base->bgrowth_set; ps->max_balancers = overrides->max_balancers || base->max_balancers; ps->bal_persist = overrides->bal_persist; ps->recv_buffer_size = (overrides->recv_buffer_size_set == 0) ? base->recv_buffer_size : overrides->recv_buffer_size; ps->recv_buffer_size_set = overrides->recv_buffer_size_set || base->recv_buffer_size_set; ps->io_buffer_size = (overrides->io_buffer_size_set == 0) ? base->io_buffer_size : overrides->io_buffer_size; ps->io_buffer_size_set = overrides->io_buffer_size_set || base->io_buffer_size_set; ps->maxfwd = (overrides->maxfwd_set == 0) ? base->maxfwd : overrides->maxfwd; ps->maxfwd_set = overrides->maxfwd_set || base->maxfwd_set; ps->timeout = (overrides->timeout_set == 0) ? base->timeout : overrides->timeout; ps->timeout_set = overrides->timeout_set || base->timeout_set; ps->badopt = (overrides->badopt_set == 0) ? base->badopt : overrides->badopt; ps->badopt_set = overrides->badopt_set || base->badopt_set; ps->proxy_status = (overrides->proxy_status_set == 0) ? base->proxy_status : overrides->proxy_status; ps->proxy_status_set = overrides->proxy_status_set || base->proxy_status_set; ps->source_address = (overrides->source_address_set == 0) ? base->source_address : overrides->source_address; ps->source_address_set = overrides->source_address_set || base->source_address_set; ps->pool = base->pool; return ps; } static const char *set_source_address(cmd_parms *parms, void *dummy, const char *arg) { proxy_server_conf *psf = ap_get_module_config(parms->server->module_config, &proxy_module); struct apr_sockaddr_t *addr; if (APR_SUCCESS == apr_sockaddr_info_get(&addr, arg, APR_UNSPEC, 0, 0, psf->pool)) { psf->source_address = addr; psf->source_address_set = 1; } else { return "ProxySourceAddress invalid value"; } return NULL; } static void *create_proxy_dir_config(apr_pool_t *p, char *dummy) { proxy_dir_conf *new = (proxy_dir_conf *) apr_pcalloc(p, sizeof(proxy_dir_conf)); /* Filled in by proxysection, when applicable */ /* Put these in the dir config so they work inside <Location> */ new->raliases = apr_array_make(p, 10, sizeof(struct proxy_alias)); new->cookie_paths = apr_array_make(p, 10, sizeof(struct proxy_alias)); new->cookie_domains = apr_array_make(p, 10, sizeof(struct proxy_alias)); new->error_override_codes = apr_array_make(p, 10, sizeof(int)); new->preserve_host_set = 0; new->preserve_host = 0; new->interpolate_env = -1; /* unset */ new->error_override = 0; new->error_override_set = 0; new->add_forwarded_headers = 1; new->add_forwarded_headers_set = 0; new->forward_100_continue = 1; new->forward_100_continue_set = 0; return (void *) new; } static int int_order(const void *i1, const void *i2) { return *(const int *)i1 - *(const int *)i2; } static void *merge_proxy_dir_config(apr_pool_t *p, void *basev, void *addv) { proxy_dir_conf *new = (proxy_dir_conf *) apr_pcalloc(p, sizeof(proxy_dir_conf)); proxy_dir_conf *add = (proxy_dir_conf *) addv; proxy_dir_conf *base = (proxy_dir_conf *) basev; new->p = add->p; new->p_is_fnmatch = add->p_is_fnmatch; new->r = add->r; new->refs = add->refs; /* Put these in the dir config so they work inside <Location> */ new->raliases = apr_array_append(p, base->raliases, add->raliases); new->cookie_paths = apr_array_append(p, base->cookie_paths, add->cookie_paths); new->cookie_domains = apr_array_append(p, base->cookie_domains, add->cookie_domains); new->error_override_codes = apr_array_append(p, base->error_override_codes, add->error_override_codes); /* Keep the array sorted for binary search (since "base" and "add" are * already sorted, it's only needed only if both are merged). */ if (base->error_override_codes->nelts && add->error_override_codes->nelts) { qsort(new->error_override_codes->elts, new->error_override_codes->nelts, sizeof(int), int_order); } new->interpolate_env = (add->interpolate_env == -1) ? base->interpolate_env : add->interpolate_env; new->preserve_host = (add->preserve_host_set == 0) ? base->preserve_host : add->preserve_host; new->preserve_host_set = add->preserve_host_set || base->preserve_host_set; new->error_override = (add->error_override_set == 0) ? base->error_override : add->error_override; new->error_override_set = add->error_override_set || base->error_override_set; new->alias = (add->alias_set == 0) ? base->alias : add->alias; new->alias_set = add->alias_set || base->alias_set; new->add_forwarded_headers = (add->add_forwarded_headers_set == 0) ? base->add_forwarded_headers : add->add_forwarded_headers; new->add_forwarded_headers_set = add->add_forwarded_headers_set || base->add_forwarded_headers_set; new->forward_100_continue = (add->forward_100_continue_set == 0) ? base->forward_100_continue : add->forward_100_continue; new->forward_100_continue_set = add->forward_100_continue_set || base->forward_100_continue_set; return new; } static const char * add_proxy(cmd_parms *cmd, void *dummy, const char *f1, const char *r1, int regex) { server_rec *s = cmd->server; proxy_server_conf *conf = (proxy_server_conf *) ap_get_module_config(s->module_config, &proxy_module); struct proxy_remote *new; char *p, *q; char *r, *f, *scheme; ap_regex_t *reg = NULL; int port; r = apr_pstrdup(cmd->pool, r1); scheme = apr_pstrdup(cmd->pool, r1); f = apr_pstrdup(cmd->pool, f1); p = strchr(r, ':'); if (p == NULL || p[1] != '/' || p[2] != '/' || p[3] == '\0') { if (regex) return "ProxyRemoteMatch: Bad syntax for a remote proxy server"; else return "ProxyRemote: Bad syntax for a remote proxy server"; } else { scheme[p-r] = 0; } q = strchr(p + 3, ':'); if (q != NULL) { if (sscanf(q + 1, "%u", &port) != 1 || port > 65535) { if (regex) return "ProxyRemoteMatch: Bad syntax for a remote proxy server (bad port number)"; else return "ProxyRemote: Bad syntax for a remote proxy server (bad port number)"; } *q = '\0'; } else port = -1; *p = '\0'; if (regex) { reg = ap_pregcomp(cmd->pool, f, AP_REG_EXTENDED); if (!reg) return "Regular expression for ProxyRemoteMatch could not be compiled."; } else if (strchr(f, ':') == NULL) ap_str_tolower(f); /* lowercase scheme */ ap_str_tolower(p + 3); /* lowercase hostname */ if (port == -1) { port = apr_uri_port_of_scheme(scheme); } new = apr_array_push(conf->proxies); new->scheme = f; new->protocol = r; new->hostname = p + 3; new->port = port; new->regexp = reg; new->use_regex = regex; return NULL; } static const char * add_proxy_noregex(cmd_parms *cmd, void *dummy, const char *f1, const char *r1) { return add_proxy(cmd, dummy, f1, r1, 0); } static const char * add_proxy_regex(cmd_parms *cmd, void *dummy, const char *f1, const char *r1) { return add_proxy(cmd, dummy, f1, r1, 1); } PROXY_DECLARE(const char *) ap_proxy_de_socketfy(apr_pool_t *p, const char *url) { const char *ptr; /* * We could be passed a URL during the config stage that contains * the UDS path... ignore it */ if (!ap_cstr_casecmpn(url, "unix:", 5) && ((ptr = ap_strchr_c(url + 5, '|')) != NULL)) { /* move past the 'unix:...|' UDS path info */ const char *ret, *c; ret = ptr + 1; /* special case: "unix:....|scheme:" is OK, expand * to "unix:....|scheme://localhost" * */ c = ap_strchr_c(ret, ':'); if (c == NULL) { return NULL; } if (c[1] == '\0') { return apr_pstrcat(p, ret, "//localhost", NULL); } else { return ret; } } return url; } static const char * add_pass(cmd_parms *cmd, void *dummy, const char *arg, int is_regex) { proxy_dir_conf *dconf = (proxy_dir_conf *)dummy; server_rec *s = cmd->server; proxy_server_conf *conf = (proxy_server_conf *) ap_get_module_config(s->module_config, &proxy_module); struct proxy_alias *new; char *f = cmd->path; char *r = NULL; const char *real; char *word; apr_table_t *params = apr_table_make(cmd->pool, 5); const apr_array_header_t *arr; const apr_table_entry_t *elts; int i; unsigned int worker_type = (is_regex) ? AP_PROXY_WORKER_IS_MATCH : AP_PROXY_WORKER_IS_PREFIX; unsigned int flags = 0; const char *err; err = ap_check_cmd_context(cmd, NOT_IN_DIRECTORY|NOT_IN_FILES); if (err) { return err; } while (*arg) { word = ap_getword_conf(cmd->pool, &arg); if (!f) { if (!strcmp(word, "~")) { if (is_regex) { return "ProxyPassMatch invalid syntax ('~' usage)."; } worker_type = AP_PROXY_WORKER_IS_MATCH; continue; } f = word; } else if (!r) { r = word; } else if (!strcasecmp(word,"nocanon")) { flags |= PROXYPASS_NOCANON; } else if (!strcasecmp(word,"interpolate")) { flags |= PROXYPASS_INTERPOLATE; } else if (!strcasecmp(word,"noquery")) { flags |= PROXYPASS_NOQUERY; } else { char *val = strchr(word, '='); if (!val) { if (cmd->path) { if (*r == '/') { return "ProxyPass|ProxyPassMatch can not have a path when defined in " "a location."; } else { return "Invalid ProxyPass|ProxyPassMatch parameter. Parameter must " "be in the form 'key=value'."; } } else { return "Invalid ProxyPass|ProxyPassMatch parameter. Parameter must be " "in the form 'key=value'."; } } else { *val++ = '\0'; } if (!strcasecmp(word, "mapping")) { if (!strcasecmp(val, "encoded")) { flags |= PROXYPASS_MAP_ENCODED; } else if (!strcasecmp(val, "servlet")) { flags |= PROXYPASS_MAP_SERVLET; } else { return "unknown mapping"; } } else { apr_table_setn(params, word, val); } } } if (flags & PROXYPASS_MAP_ENCODED) { conf->map_encoded_one = 1; } else { conf->map_encoded_all = 0; } if (r == NULL) { return "ProxyPass|ProxyPassMatch needs a path when not defined in a location"; } if (!(real = ap_proxy_de_socketfy(cmd->temp_pool, r))) { return "ProxyPass|ProxyPassMatch uses an invalid \"unix:\" URL"; } /* if per directory, save away the single alias */ if (cmd->path) { dconf->alias = apr_pcalloc(cmd->pool, sizeof(struct proxy_alias)); dconf->alias_set = 1; new = dconf->alias; if (apr_fnmatch_test(f)) { worker_type = AP_PROXY_WORKER_IS_MATCH; } } /* if per server, add to the alias array */ else { new = apr_array_push(conf->aliases); } new->fake = apr_pstrdup(cmd->pool, f); new->real = apr_pstrdup(cmd->pool, real); new->flags = flags; if (worker_type & AP_PROXY_WORKER_IS_MATCH) { new->regex = ap_pregcomp(cmd->pool, f, AP_REG_EXTENDED); if (new->regex == NULL) return "Regular expression could not be compiled."; } else { new->regex = NULL; } if (r[0] == '!' && r[1] == '\0') return NULL; arr = apr_table_elts(params); elts = (const apr_table_entry_t *)arr->elts; /* Distinguish the balancer from worker */ if (ap_proxy_valid_balancer_name(r, 9)) { proxy_balancer *balancer = ap_proxy_get_balancer(cmd->pool, conf, r, 0); char *fake_copy; /* * In the regex case supplying a fake URL doesn't make sense as it * cannot be parsed anyway with apr_uri_parse later on in * ap_proxy_define_balancer / ap_proxy_update_balancer */ if (worker_type & AP_PROXY_WORKER_IS_MATCH) { fake_copy = NULL; } else { fake_copy = f; } if (!balancer) { const char *err = ap_proxy_define_balancer(cmd->pool, &balancer, conf, r, fake_copy, 0); if (err) return apr_pstrcat(cmd->temp_pool, "ProxyPass ", err, NULL); } else { ap_proxy_update_balancer(cmd->pool, balancer, fake_copy); } for (i = 0; i < arr->nelts; i++) { const char *err = set_balancer_param(conf, cmd->pool, balancer, elts[i].key, elts[i].val); if (err) return apr_pstrcat(cmd->temp_pool, "ProxyPass ", err, NULL); } new->balancer = balancer; } else { int reuse = 0; proxy_worker *worker = ap_proxy_get_worker_ex(cmd->temp_pool, NULL, conf, new->real, worker_type); if (!worker) { const char *err; err = ap_proxy_define_worker_ex(cmd->pool, &worker, NULL, conf, r, worker_type); if (err) return apr_pstrcat(cmd->temp_pool, "ProxyPass ", err, NULL); PROXY_COPY_CONF_PARAMS(worker, conf); } else { reuse = 1; ap_log_error(APLOG_MARK, APLOG_INFO, 0, cmd->server, APLOGNO(01145) "Sharing worker '%s' instead of creating new worker '%s'", ap_proxy_worker_name(cmd->pool, worker), new->real); } for (i = 0; i < arr->nelts; i++) { if (reuse) { ap_log_error(APLOG_MARK, APLOG_WARNING, 0, cmd->server, APLOGNO(01146) "Ignoring parameter '%s=%s' for worker '%s' because of worker sharing", elts[i].key, elts[i].val, ap_proxy_worker_name(cmd->pool, worker)); } else { const char *err = set_worker_param(cmd->pool, s, worker, elts[i].key, elts[i].val); if (err) return apr_pstrcat(cmd->temp_pool, "ProxyPass ", err, NULL); } } } return NULL; } static const char * add_pass_noregex(cmd_parms *cmd, void *dummy, const char *arg) { return add_pass(cmd, dummy, arg, 0); } static const char * add_pass_regex(cmd_parms *cmd, void *dummy, const char *arg) { return add_pass(cmd, dummy, arg, 1); } static const char * add_pass_reverse(cmd_parms *cmd, void *dconf, const char *f, const char *r, const char *i) { proxy_dir_conf *conf = dconf; struct proxy_alias *new; const char *fake; const char *real; const char *interp; const char *err; err = ap_check_cmd_context(cmd, NOT_IN_DIRECTORY|NOT_IN_FILES); if (err) { return err; } if (cmd->path == NULL) { if (r == NULL || !strcasecmp(r, "interpolate")) { return "ProxyPassReverse needs a path when not defined in a location"; } fake = f; real = r; interp = i; } else { if (r && strcasecmp(r, "interpolate")) { return "ProxyPassReverse can not have a path when defined in a location"; } fake = cmd->path; real = f; interp = r; } new = apr_array_push(conf->raliases); new->fake = fake; new->real = real; new->flags = interp ? PROXYPASS_INTERPOLATE : 0; return NULL; } static const char* cookie_path(cmd_parms *cmd, void *dconf, const char *f, const char *r, const char *interp) { proxy_dir_conf *conf = dconf; struct proxy_alias *new; new = apr_array_push(conf->cookie_paths); new->fake = f; new->real = r; new->flags = interp ? PROXYPASS_INTERPOLATE : 0; return NULL; } static const char* cookie_domain(cmd_parms *cmd, void *dconf, const char *f, const char *r, const char *interp) { proxy_dir_conf *conf = dconf; struct proxy_alias *new; new = apr_array_push(conf->cookie_domains); new->fake = f; new->real = r; new->flags = interp ? PROXYPASS_INTERPOLATE : 0; return NULL; } static const char * set_proxy_exclude(cmd_parms *parms, void *dummy, const char *arg) { server_rec *s = parms->server; proxy_server_conf *conf = ap_get_module_config(s->module_config, &proxy_module); struct noproxy_entry *new; struct noproxy_entry *list = (struct noproxy_entry *) conf->noproxies->elts; struct apr_sockaddr_t *addr; int found = 0; int i; /* Don't duplicate entries */ for (i = 0; i < conf->noproxies->nelts; i++) { if (strcasecmp(arg, list[i].name) == 0) { /* ignore case for host names */ found = 1; break; } } if (!found) { new = apr_array_push(conf->noproxies); new->name = arg; if (APR_SUCCESS == apr_sockaddr_info_get(&addr, new->name, APR_UNSPEC, 0, 0, parms->pool)) { new->addr = addr; } else { new->addr = NULL; } } return NULL; } /* Similar to set_proxy_exclude(), but defining directly connected hosts, * which should never be accessed via the configured ProxyRemote servers */ static const char * set_proxy_dirconn(cmd_parms *parms, void *dummy, const char *arg) { server_rec *s = parms->server; proxy_server_conf *conf = ap_get_module_config(s->module_config, &proxy_module); struct dirconn_entry *New; struct dirconn_entry *list = (struct dirconn_entry *) conf->dirconn->elts; int found = 0; int i; /* Don't duplicate entries */ for (i = 0; i < conf->dirconn->nelts; i++) { if (strcasecmp(arg, list[i].name) == 0) { found = 1; break; } } if (!found) { New = apr_array_push(conf->dirconn); New->name = apr_pstrdup(parms->pool, arg); New->hostaddr = NULL; if (ap_proxy_is_ipaddr(New, parms->pool)) { #if DEBUGGING ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, APLOGNO(03018) "Parsed addr %s", inet_ntoa(New->addr)); ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, APLOGNO(03019) "Parsed mask %s", inet_ntoa(New->mask)); #endif } else if (ap_proxy_is_domainname(New, parms->pool)) { ap_str_tolower(New->name); #if DEBUGGING ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, APLOGNO(03020) "Parsed domain %s", New->name); #endif } else if (ap_proxy_is_hostname(New, parms->pool)) { ap_str_tolower(New->name); #if DEBUGGING ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, APLOGNO(03021) "Parsed host %s", New->name); #endif } else { ap_proxy_is_word(New, parms->pool); #if DEBUGGING fprintf(stderr, "Parsed word %s\n", New->name); #endif } } return NULL; } static const char * set_proxy_domain(cmd_parms *parms, void *dummy, const char *arg) { proxy_server_conf *psf = ap_get_module_config(parms->server->module_config, &proxy_module); if (arg[0] != '.') return "ProxyDomain: domain name must start with a dot."; psf->domain = arg; return NULL; } static const char * set_proxy_req(cmd_parms *parms, void *dummy, int flag) { proxy_server_conf *psf = ap_get_module_config(parms->server->module_config, &proxy_module); psf->req = flag; psf->req_set = 1; return NULL; } static const char * set_proxy_error_override(cmd_parms *parms, void *dconf, const char *arg) { proxy_dir_conf *conf = dconf; if (strcasecmp(arg, "Off") == 0) { conf->error_override = 0; conf->error_override_set = 1; } else if (strcasecmp(arg, "On") == 0) { conf->error_override = 1; conf->error_override_set = 1; } else if (conf->error_override_set == 1) { int *newcode; int argcode, i; if (!apr_isdigit(arg[0])) return "ProxyErrorOverride: status codes to intercept must be numeric"; if (!conf->error_override) return "ProxyErrorOverride: status codes must follow a value of 'on'"; argcode = strtol(arg, NULL, 10); if (!ap_is_HTTP_ERROR(argcode)) return "ProxyErrorOverride: status codes to intercept must be valid HTTP Status Codes >=400 && <600"; newcode = apr_array_push(conf->error_override_codes); *newcode = argcode; /* Keep the array sorted for binary search. */ for (i = conf->error_override_codes->nelts - 1; i > 0; --i) { int *oldcode = &((int *)conf->error_override_codes->elts)[i - 1]; if (*oldcode <= argcode) { break; } *newcode = *oldcode; *oldcode = argcode; newcode = oldcode; } } else return "ProxyErrorOverride first parameter must be one of: off | on"; return NULL; } static const char * add_proxy_http_headers(cmd_parms *parms, void *dconf, int flag) { proxy_dir_conf *conf = dconf; conf->add_forwarded_headers = flag; conf->add_forwarded_headers_set = 1; return NULL; } static const char * set_preserve_host(cmd_parms *parms, void *dconf, int flag) { proxy_dir_conf *conf = dconf; conf->preserve_host = flag; conf->preserve_host_set = 1; return NULL; } static const char * forward_100_continue(cmd_parms *parms, void *dconf, int flag) { proxy_dir_conf *conf = dconf; conf->forward_100_continue = flag; conf->forward_100_continue_set = 1; return NULL; } static const char * set_recv_buffer_size(cmd_parms *parms, void *dummy, const char *arg) { proxy_server_conf *psf = ap_get_module_config(parms->server->module_config, &proxy_module); int s = atoi(arg); if (s < 512 && s != 0) { return "ProxyReceiveBufferSize must be >= 512 bytes, or 0 for system default."; } psf->recv_buffer_size = s; psf->recv_buffer_size_set = 1; return NULL; } static const char * set_io_buffer_size(cmd_parms *parms, void *dummy, const char *arg) { proxy_server_conf *psf = ap_get_module_config(parms->server->module_config, &proxy_module); long s = atol(arg); if (s < 512 && s) { return "ProxyIOBufferSize must be >= 512 bytes, or 0 for system default."; } psf->io_buffer_size = (s ? s : AP_IOBUFSIZE); psf->io_buffer_size_set = 1; return NULL; } static const char * set_max_forwards(cmd_parms *parms, void *dummy, const char *arg) { proxy_server_conf *psf = ap_get_module_config(parms->server->module_config, &proxy_module); long s = atol(arg); psf->maxfwd = s; psf->maxfwd_set = 1; return NULL; } static const char* set_proxy_timeout(cmd_parms *parms, void *dummy, const char *arg) { proxy_server_conf *psf = ap_get_module_config(parms->server->module_config, &proxy_module); int timeout; timeout = atoi(arg); if (timeout<1) { return "Proxy Timeout must be at least 1 second."; } psf->timeout_set = 1; psf->timeout = apr_time_from_sec(timeout); return NULL; } static const char* set_via_opt(cmd_parms *parms, void *dummy, const char *arg) { proxy_server_conf *psf = ap_get_module_config(parms->server->module_config, &proxy_module); if (strcasecmp(arg, "Off") == 0) psf->viaopt = via_off; else if (strcasecmp(arg, "On") == 0) psf->viaopt = via_on; else if (strcasecmp(arg, "Block") == 0) psf->viaopt = via_block; else if (strcasecmp(arg, "Full") == 0) psf->viaopt = via_full; else { return "ProxyVia must be one of: " "off | on | full | block"; } psf->viaopt_set = 1; return NULL; } static const char* set_bad_opt(cmd_parms *parms, void *dummy, const char *arg) { proxy_server_conf *psf = ap_get_module_config(parms->server->module_config, &proxy_module); if (strcasecmp(arg, "IsError") == 0) psf->badopt = bad_error; else if (strcasecmp(arg, "Ignore") == 0) psf->badopt = bad_ignore; else if (strcasecmp(arg, "StartBody") == 0) psf->badopt = bad_body; else { return "ProxyBadHeader must be one of: " "IsError | Ignore | StartBody"; } psf->badopt_set = 1; return NULL; } static const char* set_status_opt(cmd_parms *parms, void *dummy, const char *arg) { proxy_server_conf *psf = ap_get_module_config(parms->server->module_config, &proxy_module); if (strcasecmp(arg, "Off") == 0) psf->proxy_status = status_off; else if (strcasecmp(arg, "On") == 0) psf->proxy_status = status_on; else if (strcasecmp(arg, "Full") == 0) psf->proxy_status = status_full; else { return "ProxyStatus must be one of: " "off | on | full"; } psf->proxy_status_set = 1; return NULL; } static const char *set_bgrowth(cmd_parms *parms, void *dummy, const char *arg) { proxy_server_conf *psf = ap_get_module_config(parms->server->module_config, &proxy_module); int growth = atoi(arg); if (growth < 0 || growth > 1000) { return "BalancerGrowth must be between 0 and 1000"; } psf->bgrowth = growth; psf->bgrowth_set = 1; return NULL; } static const char *set_persist(cmd_parms *parms, void *dummy, int flag) { proxy_server_conf *psf = ap_get_module_config(parms->server->module_config, &proxy_module); psf->bal_persist = flag; return NULL; } static const char *set_inherit(cmd_parms *parms, void *dummy, int flag) { proxy_server_conf *psf = ap_get_module_config(parms->server->module_config, &proxy_module); psf->inherit = flag; psf->inherit_set = 1; return NULL; } static const char *set_ppinherit(cmd_parms *parms, void *dummy, int flag) { proxy_server_conf *psf = ap_get_module_config(parms->server->module_config, &proxy_module); psf->ppinherit = flag; psf->ppinherit_set = 1; return NULL; } static const char *add_member(cmd_parms *cmd, void *dummy, const char *arg) { server_rec *s = cmd->server; proxy_server_conf *conf = ap_get_module_config(s->module_config, &proxy_module); proxy_balancer *balancer; proxy_worker *worker; char *path = cmd->path; char *name = NULL; const char *real; char *word; apr_table_t *params = apr_table_make(cmd->pool, 5); const apr_array_header_t *arr; const apr_table_entry_t *elts; int reuse = 0; int i; /* XXX: Should this be NOT_IN_DIRECTORY|NOT_IN_FILES? */ const char *err = ap_check_cmd_context(cmd, NOT_IN_HTACCESS); if (err) return err; if (cmd->path) path = apr_pstrdup(cmd->pool, cmd->path); while (*arg) { char *val; word = ap_getword_conf(cmd->pool, &arg); val = strchr(word, '='); if (!val) { if (!path) path = word; else if (!name) name = word; else { if (cmd->path) return "BalancerMember can not have a balancer name when defined in a location"; else return "Invalid BalancerMember parameter. Parameter must " "be in the form 'key=value'"; } } else { *val++ = '\0'; apr_table_setn(params, word, val); } } if (!path) return "BalancerMember must define balancer name when outside <Proxy > section"; if (!name) return "BalancerMember must define remote proxy server"; if (!(real = ap_proxy_de_socketfy(cmd->temp_pool, name))) { return "BalancerMember uses an invalid \"unix:\" URL"; } ap_str_tolower(path); /* lowercase scheme://hostname */ /* Try to find the balancer */ balancer = ap_proxy_get_balancer(cmd->temp_pool, conf, path, 0); if (!balancer) { err = ap_proxy_define_balancer(cmd->pool, &balancer, conf, path, "/", 0); if (err) return apr_pstrcat(cmd->temp_pool, "BalancerMember ", err, NULL); } /* Try to find existing worker */ worker = ap_proxy_get_worker(cmd->temp_pool, balancer, conf, real); if (!worker) { ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, cmd->server, APLOGNO(01147) "Defining worker '%s' for balancer '%s'", name, balancer->s->name); if ((err = ap_proxy_define_worker(cmd->pool, &worker, balancer, conf, name, 0)) != NULL) return apr_pstrcat(cmd->temp_pool, "BalancerMember ", err, NULL); ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, cmd->server, APLOGNO(01148) "Defined worker '%s' for balancer '%s'", ap_proxy_worker_name(cmd->pool, worker), balancer->s->name); PROXY_COPY_CONF_PARAMS(worker, conf); } else { reuse = 1; ap_log_error(APLOG_MARK, APLOG_INFO, 0, cmd->server, APLOGNO(01149) "Sharing worker '%s' instead of creating new worker '%s'", ap_proxy_worker_name(cmd->pool, worker), name); } if (!worker->section_config) { worker->section_config = balancer->section_config; } arr = apr_table_elts(params); elts = (const apr_table_entry_t *)arr->elts; for (i = 0; i < arr->nelts; i++) { if (reuse) { ap_log_error(APLOG_MARK, APLOG_WARNING, 0, cmd->server, APLOGNO(01150) "Ignoring parameter '%s=%s' for worker '%s' because of worker sharing", elts[i].key, elts[i].val, ap_proxy_worker_name(cmd->pool, worker)); } else { err = set_worker_param(cmd->pool, cmd->server, worker, elts[i].key, elts[i].val); if (err) return apr_pstrcat(cmd->temp_pool, "BalancerMember ", err, NULL); } } return NULL; } static const char * set_proxy_param(cmd_parms *cmd, void *dummy, const char *arg) { server_rec *s = cmd->server; proxy_server_conf *conf = (proxy_server_conf *) ap_get_module_config(s->module_config, &proxy_module); char *name = NULL; char *word, *val; proxy_balancer *balancer = NULL; proxy_worker *worker = NULL; unsigned int worker_type = 0; int in_proxy_section = 0; /* XXX: Should this be NOT_IN_DIRECTORY|NOT_IN_FILES? */ const char *err = ap_check_cmd_context(cmd, NOT_IN_HTACCESS); if (err) return err; if (cmd->directive->parent && strncasecmp(cmd->directive->parent->directive, "<Proxy", 6) == 0) { const char *pargs = cmd->directive->parent->args; /* Directive inside <Proxy section * Parent directive arg is the worker/balancer name. */ name = ap_getword_conf(cmd->temp_pool, &pargs); if ((word = ap_strchr(name, '>'))) *word = '\0'; if (strncasecmp(cmd->directive->parent->directive + 6, "Match", 5) == 0) { worker_type = AP_PROXY_WORKER_IS_MATCH; } else { worker_type = AP_PROXY_WORKER_IS_PREFIX; } in_proxy_section = 1; } else { /* Standard set directive with worker/balancer * name as first param. */ name = ap_getword_conf(cmd->temp_pool, &arg); } if (ap_proxy_valid_balancer_name(name, 9)) { balancer = ap_proxy_get_balancer(cmd->pool, conf, name, 0); if (!balancer) { if (in_proxy_section) { err = ap_proxy_define_balancer(cmd->pool, &balancer, conf, name, "/", 0); if (err) return apr_pstrcat(cmd->temp_pool, "ProxySet ", err, NULL); } else return apr_pstrcat(cmd->temp_pool, "ProxySet can not find '", name, "' Balancer.", NULL); } } else { const char *real; if (!(real = ap_proxy_de_socketfy(cmd->temp_pool, name))) { return "ProxySet uses an invalid \"unix:\" URL"; } worker = ap_proxy_get_worker_ex(cmd->temp_pool, NULL, conf, real, worker_type); if (!worker) { if (in_proxy_section) { err = ap_proxy_define_worker_ex(cmd->pool, &worker, NULL, conf, name, worker_type); if (err) return apr_pstrcat(cmd->temp_pool, "ProxySet ", err, NULL); } else return apr_pstrcat(cmd->temp_pool, "ProxySet can not find '", name, "' Worker.", NULL); } } while (*arg) { word = ap_getword_conf(cmd->pool, &arg); val = strchr(word, '='); if (!val) { return "Invalid ProxySet parameter. Parameter must be " "in the form 'key=value'"; } else *val++ = '\0'; if (worker) err = set_worker_param(cmd->pool, cmd->server, worker, word, val); else err = set_balancer_param(conf, cmd->pool, balancer, word, val); if (err) return apr_pstrcat(cmd->temp_pool, "ProxySet: ", err, " ", word, "=", val, "; ", name, NULL); } return NULL; } static void ap_add_per_proxy_conf(server_rec *s, ap_conf_vector_t *dir_config) { proxy_server_conf *sconf = ap_get_module_config(s->module_config, &proxy_module); void **new_space = (void **)apr_array_push(sconf->sec_proxy); *new_space = dir_config; } static const char *proxysection(cmd_parms *cmd, void *mconfig, const char *arg) { const char *errmsg; const char *endp = ap_strrchr_c(arg, '>'); int old_overrides = cmd->override; char *old_path = cmd->path; proxy_dir_conf *conf; ap_conf_vector_t *new_dir_conf = ap_create_per_dir_config(cmd->pool); ap_regex_t *r = NULL; const command_rec *thiscmd = cmd->cmd; char *word, *val; proxy_balancer *balancer = NULL; proxy_worker *worker = NULL; unsigned int worker_type = AP_PROXY_WORKER_IS_PREFIX; const char *err = ap_check_cmd_context(cmd, NOT_IN_DIR_CONTEXT); proxy_server_conf *sconf = (proxy_server_conf *) ap_get_module_config(cmd->server->module_config, &proxy_module); if (err != NULL) { return err; } if (endp == NULL) { return apr_pstrcat(cmd->pool, cmd->cmd->name, "> directive missing closing '>'", NULL); } arg = apr_pstrndup(cmd->pool, arg, endp-arg); if (!arg) { if (thiscmd->cmd_data) return "<ProxyMatch > block must specify a path"; else return "<Proxy > block must specify a path"; } cmd->path = ap_getword_conf(cmd->pool, &arg); cmd->override = OR_ALL|ACCESS_CONF|PROXY_CONF; if (!strncasecmp(cmd->path, "proxy:", 6)) cmd->path += 6; /* XXX Ignore case? What if we proxy a case-insensitive server?!? * While we are at it, shouldn't we also canonicalize the entire * scheme? See proxy_fixup() */ if (thiscmd->cmd_data) { /* <ProxyMatch> */ r = ap_pregcomp(cmd->pool, cmd->path, AP_REG_EXTENDED); if (!r) { return "Regex could not be compiled"; } worker_type = AP_PROXY_WORKER_IS_MATCH; } /* initialize our config and fetch it */ conf = ap_set_config_vectors(cmd->server, new_dir_conf, cmd->path, &proxy_module, cmd->pool); errmsg = ap_walk_config(cmd->directive->first_child, cmd, new_dir_conf); if (errmsg != NULL) return errmsg; conf->r = r; conf->p = cmd->path; conf->p_is_fnmatch = apr_fnmatch_test(conf->p); if (r) { conf->refs = apr_array_make(cmd->pool, 8, sizeof(char *)); ap_regname(r, conf->refs, AP_REG_MATCH, 1); } ap_add_per_proxy_conf(cmd->server, new_dir_conf); if (*arg != '\0') { if (thiscmd->cmd_data) return "Multiple <ProxyMatch> arguments not (yet) supported."; if (conf->p_is_fnmatch) return apr_pstrcat(cmd->pool, thiscmd->name, "> arguments are not supported for wildchar url.", NULL); if (!ap_strchr_c(conf->p, ':')) return apr_pstrcat(cmd->pool, thiscmd->name, "> arguments are not supported for non url.", NULL); if (ap_proxy_valid_balancer_name((char *)conf->p, 9)) { balancer = ap_proxy_get_balancer(cmd->pool, sconf, conf->p, 0); if (!balancer) { err = ap_proxy_define_balancer(cmd->pool, &balancer, sconf, conf->p, "/", 0); if (err) return apr_pstrcat(cmd->temp_pool, thiscmd->name, " ", err, NULL); } if (!balancer->section_config) { balancer->section_config = new_dir_conf; } } else { const char *real; if (!(real = ap_proxy_de_socketfy(cmd->temp_pool, conf->p))) { return "<Proxy/ProxyMatch > uses an invalid \"unix:\" URL"; } worker = ap_proxy_get_worker_ex(cmd->temp_pool, NULL, sconf, real, worker_type); if (!worker) { err = ap_proxy_define_worker_ex(cmd->pool, &worker, NULL, sconf, conf->p, worker_type); if (err) return apr_pstrcat(cmd->temp_pool, thiscmd->name, " ", err, NULL); } if (!worker->section_config) { worker->section_config = new_dir_conf; } } if (worker == NULL && balancer == NULL) { return apr_pstrcat(cmd->pool, thiscmd->name, "> arguments are supported only for workers.", NULL); } while (*arg) { word = ap_getword_conf(cmd->pool, &arg); val = strchr(word, '='); if (!val) { return "Invalid Proxy parameter. Parameter must be " "in the form 'key=value'"; } else *val++ = '\0'; if (worker) err = set_worker_param(cmd->pool, cmd->server, worker, word, val); else err = set_balancer_param(sconf, cmd->pool, balancer, word, val); if (err) return apr_pstrcat(cmd->temp_pool, thiscmd->name, " ", err, " ", word, "=", val, "; ", conf->p, NULL); } } cmd->path = old_path; cmd->override = old_overrides; return NULL; } static const command_rec proxy_cmds[] = { AP_INIT_RAW_ARGS("<Proxy", proxysection, NULL, RSRC_CONF, "Container for directives affecting resources located in the proxied " "location"), AP_INIT_RAW_ARGS("<ProxyMatch", proxysection, (void*)1, RSRC_CONF, "Container for directives affecting resources located in the proxied " "location, in regular expression syntax"), AP_INIT_FLAG("ProxyRequests", set_proxy_req, NULL, RSRC_CONF, "on if the true proxy requests should be accepted"), AP_INIT_TAKE2("ProxyRemote", add_proxy_noregex, NULL, RSRC_CONF, "a scheme, partial URL or '*' and a proxy server"), AP_INIT_TAKE2("ProxyRemoteMatch", add_proxy_regex, NULL, RSRC_CONF, "a regex pattern and a proxy server"), AP_INIT_FLAG("ProxyPassInterpolateEnv", ap_set_flag_slot_char, (void*)APR_OFFSETOF(proxy_dir_conf, interpolate_env), RSRC_CONF|ACCESS_CONF, "Interpolate Env Vars in reverse Proxy") , AP_INIT_RAW_ARGS("ProxyPass", add_pass_noregex, NULL, RSRC_CONF|ACCESS_CONF, "a virtual path and a URL"), AP_INIT_RAW_ARGS("ProxyPassMatch", add_pass_regex, NULL, RSRC_CONF|ACCESS_CONF, "a virtual path and a URL"), AP_INIT_TAKE123("ProxyPassReverse", add_pass_reverse, NULL, RSRC_CONF|ACCESS_CONF, "a virtual path and a URL for reverse proxy behaviour"), AP_INIT_TAKE23("ProxyPassReverseCookiePath", cookie_path, NULL, RSRC_CONF|ACCESS_CONF, "Path rewrite rule for proxying cookies"), AP_INIT_TAKE23("ProxyPassReverseCookieDomain", cookie_domain, NULL, RSRC_CONF|ACCESS_CONF, "Domain rewrite rule for proxying cookies"), AP_INIT_ITERATE("ProxyBlock", set_proxy_exclude, NULL, RSRC_CONF, "A list of names, hosts or domains to which the proxy will not connect"), AP_INIT_TAKE1("ProxyReceiveBufferSize", set_recv_buffer_size, NULL, RSRC_CONF, "Receive buffer size for outgoing HTTP and FTP connections in bytes"), AP_INIT_TAKE1("ProxyIOBufferSize", set_io_buffer_size, NULL, RSRC_CONF, "IO buffer size for outgoing HTTP and FTP connections in bytes"), AP_INIT_TAKE1("ProxyMaxForwards", set_max_forwards, NULL, RSRC_CONF, "The maximum number of proxies a request may be forwarded through."), AP_INIT_ITERATE("NoProxy", set_proxy_dirconn, NULL, RSRC_CONF, "A list of domains, hosts, or subnets to which the proxy will connect directly"), AP_INIT_TAKE1("ProxyDomain", set_proxy_domain, NULL, RSRC_CONF, "The default intranet domain name (in absence of a domain in the URL)"), AP_INIT_TAKE1("ProxyVia", set_via_opt, NULL, RSRC_CONF, "Configure Via: proxy header header to one of: on | off | block | full"), AP_INIT_ITERATE("ProxyErrorOverride", set_proxy_error_override, NULL, RSRC_CONF|ACCESS_CONF, "use our error handling pages instead of the servers' we are proxying"), AP_INIT_FLAG("ProxyPreserveHost", set_preserve_host, NULL, RSRC_CONF|ACCESS_CONF, "on if we should preserve host header while proxying"), AP_INIT_TAKE1("ProxyTimeout", set_proxy_timeout, NULL, RSRC_CONF, "Set the timeout (in seconds) for a proxied connection. " "This overrides the server timeout"), AP_INIT_TAKE1("ProxyBadHeader", set_bad_opt, NULL, RSRC_CONF, "How to handle bad header line in response: IsError | Ignore | StartBody"), AP_INIT_RAW_ARGS("BalancerMember", add_member, NULL, RSRC_CONF|ACCESS_CONF, "A balancer name and scheme with list of params"), AP_INIT_TAKE1("BalancerGrowth", set_bgrowth, NULL, RSRC_CONF, "Number of additional Balancers that can be added post-config"), AP_INIT_FLAG("BalancerPersist", set_persist, NULL, RSRC_CONF, "on if the balancer should persist changes on reboot/restart made via the Balancer Manager"), AP_INIT_FLAG("BalancerInherit", set_inherit, NULL, RSRC_CONF, "on if this server should inherit Balancers and Workers defined in the main server " "(Setting to off recommended if using the Balancer Manager)"), AP_INIT_FLAG("ProxyPassInherit", set_ppinherit, NULL, RSRC_CONF, "on if this server should inherit all ProxyPass directives defined in the main server " "(Setting to off recommended if using the Balancer Manager)"), AP_INIT_TAKE1("ProxyStatus", set_status_opt, NULL, RSRC_CONF, "Configure Status: proxy status to one of: on | off | full"), AP_INIT_RAW_ARGS("ProxySet", set_proxy_param, NULL, RSRC_CONF|ACCESS_CONF, "A balancer or worker name with list of params"), AP_INIT_TAKE1("ProxySourceAddress", set_source_address, NULL, RSRC_CONF, "Configure local source IP used for request forward"), AP_INIT_FLAG("ProxyAddHeaders", add_proxy_http_headers, NULL, RSRC_CONF|ACCESS_CONF, "on if X-Forwarded-* headers should be added or completed"), AP_INIT_FLAG("Proxy100Continue", forward_100_continue, NULL, RSRC_CONF|ACCESS_CONF, "on if 100-Continue should be forwarded to the origin server, off if the " "proxy should handle it by itself"), {NULL} }; static APR_OPTIONAL_FN_TYPE(ssl_proxy_enable) *proxy_ssl_enable = NULL; static APR_OPTIONAL_FN_TYPE(ssl_engine_disable) *proxy_ssl_disable = NULL; static APR_OPTIONAL_FN_TYPE(ssl_engine_set) *proxy_ssl_engine = NULL; PROXY_DECLARE(int) ap_proxy_ssl_enable(conn_rec *c) { /* * if c == NULL just check if the optional function was imported * else run the optional function so ssl filters are inserted */ if (c == NULL) { return ap_ssl_has_outgoing_handlers(); } return ap_ssl_bind_outgoing(c, NULL, 1) == OK; } PROXY_DECLARE(int) ap_proxy_ssl_disable(conn_rec *c) { return ap_ssl_bind_outgoing(c, NULL, 0) == OK; } PROXY_DECLARE(int) ap_proxy_ssl_engine(conn_rec *c, ap_conf_vector_t *per_dir_config, int enable) { /* * if c == NULL just check if the optional function was imported * else run the optional function so ssl filters are inserted */ if (c == NULL) { return ap_ssl_has_outgoing_handlers(); } return ap_ssl_bind_outgoing(c, per_dir_config, enable) == OK; } PROXY_DECLARE(int) ap_proxy_conn_is_https(conn_rec *c) { return ap_ssl_conn_is_ssl(c); } PROXY_DECLARE(const char *) ap_proxy_ssl_val(apr_pool_t *p, server_rec *s, conn_rec *c, request_rec *r, const char *var) { return ap_ssl_var_lookup(p, s, c, r, var); } static int proxy_post_config(apr_pool_t *pconf, apr_pool_t *plog, apr_pool_t *ptemp, server_rec *main_s) { server_rec *s = main_s; apr_status_t rv = ap_global_mutex_create(&proxy_mutex, NULL, proxy_id, NULL, s, pconf, 0); if (rv != APR_SUCCESS) { ap_log_perror(APLOG_MARK, APLOG_CRIT, rv, plog, APLOGNO(02478) "failed to create %s mutex", proxy_id); return rv; } proxy_ssl_enable = APR_RETRIEVE_OPTIONAL_FN(ssl_proxy_enable); proxy_ssl_disable = APR_RETRIEVE_OPTIONAL_FN(ssl_engine_disable); proxy_ssl_engine = APR_RETRIEVE_OPTIONAL_FN(ssl_engine_set); ap_proxy_strmatch_path = apr_strmatch_precompile(pconf, "path=", 0); ap_proxy_strmatch_domain = apr_strmatch_precompile(pconf, "domain=", 0); for (; s; s = s->next) { int rc, i; proxy_server_conf *sconf = ap_get_module_config(s->module_config, &proxy_module); ap_conf_vector_t **sections = (ap_conf_vector_t **)sconf->sec_proxy->elts; for (i = 0; i < sconf->sec_proxy->nelts; ++i) { rc = proxy_run_section_post_config(pconf, ptemp, plog, s, sections[i]); if (rc != OK && rc != DECLINED) { return rc; } } } return OK; } /* * proxy Extension to mod_status */ static int proxy_status_hook(request_rec *r, int flags) { int i, n; void *sconf = r->server->module_config; proxy_server_conf *conf = (proxy_server_conf *) ap_get_module_config(sconf, &proxy_module); proxy_balancer *balancer = NULL; proxy_worker **worker = NULL; if (conf->balancers->nelts == 0 || conf->proxy_status == status_off) return OK; balancer = (proxy_balancer *)conf->balancers->elts; for (i = 0; i < conf->balancers->nelts; i++) { if (!(flags & AP_STATUS_SHORT)) { ap_rputs("<hr />\n<h1>Proxy LoadBalancer Status for ", r); ap_rvputs(r, balancer->s->name, "</h1>\n\n", NULL); ap_rputs("\n\n<table border=\"0\"><tr>" "<th>SSes</th><th>Timeout</th><th>Method</th>" "</tr>\n<tr>", r); if (*balancer->s->sticky) { if (strcmp(balancer->s->sticky, balancer->s->sticky_path)) { ap_rvputs(r, "<td>", balancer->s->sticky, " | ", balancer->s->sticky_path, NULL); } else { ap_rvputs(r, "<td>", balancer->s->sticky, NULL); } } else { ap_rputs("<td> - ", r); } ap_rprintf(r, "</td><td>%" APR_TIME_T_FMT "</td>", apr_time_sec(balancer->s->timeout)); ap_rprintf(r, "<td>%s</td>\n", balancer->lbmethod->name); ap_rputs("</table>\n", r); ap_rputs("\n\n<table border=\"0\"><tr>" "<th>Sch</th><th>Host</th><th>Stat</th>" "<th>Route</th><th>Redir</th>" "<th>F</th><th>Set</th><th>Acc</th><th>Busy</th><th>Wr</th><th>Rd</th>" "</tr>\n", r); } else { ap_rprintf(r, "ProxyBalancer[%d]Name: %s\n", i, balancer->s->name); } worker = (proxy_worker **)balancer->workers->elts; for (n = 0; n < balancer->workers->nelts; n++) { char fbuf[50]; if (!(flags & AP_STATUS_SHORT)) { ap_rvputs(r, "<tr>\n<td>", (*worker)->s->scheme, "</td>", NULL); ap_rvputs(r, "<td>", (*worker)->s->hostname_ex, "</td><td>", NULL); ap_rvputs(r, ap_proxy_parse_wstatus(r->pool, *worker), NULL); ap_rvputs(r, "</td><td>", (*worker)->s->route, NULL); ap_rvputs(r, "</td><td>", (*worker)->s->redirect, NULL); ap_rprintf(r, "</td><td>%.2f</td>", (float)((*worker)->s->lbfactor)/100.0); ap_rprintf(r, "<td>%d</td>", (*worker)->s->lbset); ap_rprintf(r, "<td>%" APR_SIZE_T_FMT "</td>", (*worker)->s->elected); ap_rprintf(r, "<td>%" APR_SIZE_T_FMT "</td><td>", (*worker)->s->busy); ap_rputs(apr_strfsize((*worker)->s->transferred, fbuf), r); ap_rputs("</td><td>", r); ap_rputs(apr_strfsize((*worker)->s->read, fbuf), r); ap_rputs("</td>\n", r); /* TODO: Add the rest of dynamic worker data */ ap_rputs("</tr>\n", r); } else { ap_rprintf(r, "ProxyBalancer[%d]Worker[%d]Name: %s\n", i, n, (*worker)->s->name_ex); ap_rprintf(r, "ProxyBalancer[%d]Worker[%d]Status: %s\n", i, n, ap_proxy_parse_wstatus(r->pool, *worker)); ap_rprintf(r, "ProxyBalancer[%d]Worker[%d]Elected: %" APR_SIZE_T_FMT "\n", i, n, (*worker)->s->elected); ap_rprintf(r, "ProxyBalancer[%d]Worker[%d]Busy: %" APR_SIZE_T_FMT "\n", i, n, (*worker)->s->busy); ap_rprintf(r, "ProxyBalancer[%d]Worker[%d]Sent: %" APR_OFF_T_FMT "K\n", i, n, (*worker)->s->transferred >> 10); ap_rprintf(r, "ProxyBalancer[%d]Worker[%d]Rcvd: %" APR_OFF_T_FMT "K\n", i, n, (*worker)->s->read >> 10); /* TODO: Add the rest of dynamic worker data */ } ++worker; } if (!(flags & AP_STATUS_SHORT)) { ap_rputs("</table>\n", r); } ++balancer; } if (!(flags & AP_STATUS_SHORT)) { ap_rputs("<hr /><table>\n" "<tr><th>SSes</th><td>Sticky session name</td></tr>\n" "<tr><th>Timeout</th><td>Balancer Timeout</td></tr>\n" "<tr><th>Sch</th><td>Connection scheme</td></tr>\n" "<tr><th>Host</th><td>Backend Hostname</td></tr>\n" "<tr><th>Stat</th><td>Worker status</td></tr>\n" "<tr><th>Route</th><td>Session Route</td></tr>\n" "<tr><th>Redir</th><td>Session Route Redirection</td></tr>\n" "<tr><th>F</th><td>Load Balancer Factor</td></tr>\n" "<tr><th>Acc</th><td>Number of uses</td></tr>\n" "<tr><th>Wr</th><td>Number of bytes transferred</td></tr>\n" "<tr><th>Rd</th><td>Number of bytes read</td></tr>\n" "</table>", r); } return OK; } static void child_init(apr_pool_t *p, server_rec *s) { proxy_worker *reverse = NULL; apr_status_t rv = apr_global_mutex_child_init(&proxy_mutex, apr_global_mutex_lockfile(proxy_mutex), p); if (rv != APR_SUCCESS) { ap_log_error(APLOG_MARK, APLOG_CRIT, rv, s, APLOGNO(02479) "could not init proxy_mutex in child"); exit(1); /* Ugly, but what else? */ } /* TODO */ while (s) { void *sconf = s->module_config; proxy_server_conf *conf; proxy_worker *worker; int i; conf = (proxy_server_conf *)ap_get_module_config(sconf, &proxy_module); /* * NOTE: non-balancer members don't use shm at all... * after all, why should they? */ worker = (proxy_worker *)conf->workers->elts; for (i = 0; i < conf->workers->nelts; i++, worker++) { ap_proxy_initialize_worker(worker, s, p); } /* Create and initialize forward worker if defined */ if (conf->req_set && conf->req) { proxy_worker *forward; ap_proxy_define_worker(conf->pool, &forward, NULL, NULL, "http://www.apache.org", 0); conf->forward = forward; PROXY_STRNCPY(conf->forward->s->name, "proxy:forward"); PROXY_STRNCPY(conf->forward->s->name_ex, "proxy:forward"); PROXY_STRNCPY(conf->forward->s->hostname, "*"); /* for compatibility */ PROXY_STRNCPY(conf->forward->s->hostname_ex, "*"); PROXY_STRNCPY(conf->forward->s->scheme, "*"); conf->forward->hash.def = conf->forward->s->hash.def = ap_proxy_hashfunc(conf->forward->s->name_ex, PROXY_HASHFUNC_DEFAULT); conf->forward->hash.fnv = conf->forward->s->hash.fnv = ap_proxy_hashfunc(conf->forward->s->name_ex, PROXY_HASHFUNC_FNV); /* Do not disable worker in case of errors */ conf->forward->s->status |= PROXY_WORKER_IGNORE_ERRORS; /* Mark as the "generic" worker */ conf->forward->s->status |= PROXY_WORKER_GENERIC; ap_proxy_initialize_worker(conf->forward, s, p); /* Disable address cache for generic forward worker */ conf->forward->s->is_address_reusable = 0; } if (!reverse) { ap_proxy_define_worker(conf->pool, &reverse, NULL, NULL, "http://www.apache.org", 0); PROXY_STRNCPY(reverse->s->name, "proxy:reverse"); PROXY_STRNCPY(reverse->s->name_ex, "proxy:reverse"); PROXY_STRNCPY(reverse->s->hostname, "*"); /* for compatibility */ PROXY_STRNCPY(reverse->s->hostname_ex, "*"); PROXY_STRNCPY(reverse->s->scheme, "*"); reverse->hash.def = reverse->s->hash.def = ap_proxy_hashfunc(reverse->s->name_ex, PROXY_HASHFUNC_DEFAULT); reverse->hash.fnv = reverse->s->hash.fnv = ap_proxy_hashfunc(reverse->s->name_ex, PROXY_HASHFUNC_FNV); /* Do not disable worker in case of errors */ reverse->s->status |= PROXY_WORKER_IGNORE_ERRORS; /* Mark as the "generic" worker */ reverse->s->status |= PROXY_WORKER_GENERIC; conf->reverse = reverse; ap_proxy_initialize_worker(conf->reverse, s, p); /* Disable address cache for generic reverse worker */ reverse->s->is_address_reusable = 0; } conf->reverse = reverse; s = s->next; } } /* * This routine is called before the server processes the configuration * files. */ static int proxy_pre_config(apr_pool_t *pconf, apr_pool_t *plog, apr_pool_t *ptemp) { apr_status_t rv = ap_mutex_register(pconf, proxy_id, NULL, APR_LOCK_DEFAULT, 0); if (rv != APR_SUCCESS) { ap_log_perror(APLOG_MARK, APLOG_CRIT, rv, plog, APLOGNO(02480) "failed to register %s mutex", proxy_id); return 500; /* An HTTP status would be a misnomer! */ } APR_OPTIONAL_HOOK(ap, status_hook, proxy_status_hook, NULL, NULL, APR_HOOK_MIDDLE); /* Reset workers count on graceful restart */ proxy_lb_workers = 0; set_worker_hc_param_f = APR_RETRIEVE_OPTIONAL_FN(set_worker_hc_param); return OK; } static void register_hooks(apr_pool_t *p) { /* fixup before mod_rewrite, so that the proxied url will not * escaped accidentally by our fixup. */ static const char * const aszSucc[] = { "mod_rewrite.c", NULL}; /* Only the mpm_winnt has child init hook handler. * make sure that we are called after the mpm * initializes. */ static const char *const aszPred[] = { "mpm_winnt.c", "mod_proxy_balancer.c", "mod_proxy_hcheck.c", NULL}; /* handler */ ap_hook_handler(proxy_handler, NULL, NULL, APR_HOOK_FIRST); /* filename-to-URI translation */ ap_hook_pre_translate_name(proxy_pre_translate_name, NULL, NULL, APR_HOOK_MIDDLE); ap_hook_translate_name(proxy_translate_name, aszSucc, NULL, APR_HOOK_FIRST); /* walk <Proxy > entries and suppress default TRACE behavior */ ap_hook_map_to_storage(proxy_map_location, NULL,NULL, APR_HOOK_FIRST); /* fixups */ ap_hook_fixups(proxy_fixup, NULL, aszSucc, APR_HOOK_FIRST); /* post read_request handling */ ap_hook_post_read_request(proxy_detect, NULL, NULL, APR_HOOK_FIRST); /* pre config handling */ ap_hook_pre_config(proxy_pre_config, NULL, NULL, APR_HOOK_MIDDLE); /* post config handling */ ap_hook_post_config(proxy_post_config, NULL, NULL, APR_HOOK_MIDDLE); /* child init handling */ ap_hook_child_init(child_init, aszPred, NULL, APR_HOOK_MIDDLE); /* register optional functions within proxy_util.c */ proxy_util_register_hooks(p); } AP_DECLARE_MODULE(proxy) = { STANDARD20_MODULE_STUFF, create_proxy_dir_config, /* create per-directory config structure */ merge_proxy_dir_config, /* merge per-directory config structures */ create_proxy_config, /* create per-server config structure */ merge_proxy_config, /* merge per-server config structures */ proxy_cmds, /* command table */ register_hooks }; APR_HOOK_STRUCT( APR_HOOK_LINK(scheme_handler) APR_HOOK_LINK(canon_handler) APR_HOOK_LINK(pre_request) APR_HOOK_LINK(post_request) APR_HOOK_LINK(request_status) APR_HOOK_LINK(check_trans) ) APR_IMPLEMENT_EXTERNAL_HOOK_RUN_FIRST(proxy, PROXY, int, scheme_handler, (request_rec *r, proxy_worker *worker, proxy_server_conf *conf, char *url, const char *proxyhost, apr_port_t proxyport),(r,worker,conf, url,proxyhost,proxyport),DECLINED) APR_IMPLEMENT_EXTERNAL_HOOK_RUN_FIRST(proxy, PROXY, int, check_trans, (request_rec *r, const char *url), (r, url), DECLINED) APR_IMPLEMENT_EXTERNAL_HOOK_RUN_FIRST(proxy, PROXY, int, canon_handler, (request_rec *r, char *url),(r, url),DECLINED) APR_IMPLEMENT_EXTERNAL_HOOK_RUN_FIRST(proxy, PROXY, int, pre_request, ( proxy_worker **worker, proxy_balancer **balancer, request_rec *r, proxy_server_conf *conf, char **url),(worker,balancer, r,conf,url),DECLINED) APR_IMPLEMENT_EXTERNAL_HOOK_RUN_FIRST(proxy, PROXY, int, post_request, (proxy_worker *worker, proxy_balancer *balancer, request_rec *r, proxy_server_conf *conf),(worker, balancer,r,conf),DECLINED) APR_IMPLEMENT_OPTIONAL_HOOK_RUN_ALL(proxy, PROXY, int, section_post_config, (apr_pool_t *p, apr_pool_t *plog, apr_pool_t *ptemp, server_rec *s, ap_conf_vector_t *section_config), (p, ptemp, plog, s, section_config), OK, DECLINED) APR_IMPLEMENT_OPTIONAL_HOOK_RUN_ALL(proxy, PROXY, int, fixups, (request_rec *r), (r), OK, DECLINED) APR_IMPLEMENT_OPTIONAL_HOOK_RUN_ALL(proxy, PROXY, int, request_status, (int *status, request_rec *r), (status, r), OK, DECLINED)