diff options
Diffstat (limited to 'rubbos/app/httpd-2.0.64/modules/proxy/mod_proxy.c')
| -rw-r--r-- | rubbos/app/httpd-2.0.64/modules/proxy/mod_proxy.c | 1181 |
1 files changed, 1181 insertions, 0 deletions
diff --git a/rubbos/app/httpd-2.0.64/modules/proxy/mod_proxy.c b/rubbos/app/httpd-2.0.64/modules/proxy/mod_proxy.c new file mode 100644 index 00000000..84d5fb10 --- /dev/null +++ b/rubbos/app/httpd-2.0.64/modules/proxy/mod_proxy.c @@ -0,0 +1,1181 @@ +/* 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. + */ + +#define CORE_PRIVATE + +#include "mod_proxy.h" +#include "mod_core.h" + +#include "apr_optional.h" + +#ifndef MAX +#define MAX(x,y) ((x) >= (y) ? (x) : (y)) +#endif + +/* + * 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. + * type_checker: set type to PROXY_MAGIC_TYPE if filename begins proxy: + * fix_ups: convert the URL stored in the filename to the + * canonical form. + * handler: handle proxy requests + */ + +/* -------------------------------------------------------------- */ +/* Translate the URL into a 'filename' */ + +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; + + while (aliasp < end_fakename) { + 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; + } + } + + /* 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; +} + +/* 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; + + 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 + && !strcasecmp(r->parsed_uri.scheme, ap_http_method(r)) + && 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 int proxy_trans(request_rec *r) +{ + void *sconf = r->server->module_config; + proxy_server_conf *conf = + (proxy_server_conf *) ap_get_module_config(sconf, &proxy_module); + int i, len; + struct proxy_alias *ent = (struct proxy_alias *) conf->aliases->elts; + + if (r->proxyreq) { + /* someone has already set up the proxy, it was possibly ourselves + * in proxy_detect + */ + return OK; + } + + /* XXX: since r->uri has been manipulated already we're not really + * compliant with RFC1945 at this point. But this probably isn't + * an issue because this is a hybrid proxy/origin server. + */ + + for (i = 0; i < conf->aliases->nelts; i++) { + len = alias_match(r->uri, ent[i].fake); + + if (len > 0) { + if ((ent[i].real[0] == '!' ) && ( ent[i].real[1] == 0 )) { + return DECLINED; + } + + r->filename = apr_pstrcat(r->pool, "proxy:", ent[i].real, + (r->uri + len ), NULL); + r->handler = "proxy-server"; + r->proxyreq = PROXYREQ_REVERSE; + return OK; + } + } + return DECLINED; +} + +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->server->lookup_defaults; + 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; + + for (j = 0; j < num_sec; ++j) + { + entry_config = sec_proxy[j]; + entry_proxy = ap_get_module_config(entry_config, &proxy_module); + + /* XXX: What about case insensitive matching ??? + * Compare regex, fnmatch or string as appropriate + * If the entry doesn't relate, then continue + */ + if (entry_proxy->r + ? ap_regexec(entry_proxy->r, proxyname, 0, NULL, 0) + : (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; + + 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; + + 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]; + + /* 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 + || strcasecmp(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_set(r->headers_out, "Location", nuri); + ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, + "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 *url, *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; + long maxfwd; + + /* is this for us? */ + if (!r->proxyreq || !r->filename || strncmp(r->filename, "proxy:", 6) != 0) + return DECLINED; + + /* handle max-forwards / OPTIONS / TRACE */ + if ((str = apr_table_get(r->headers_in, "Max-Forwards"))) { + maxfwd = strtol(str, NULL, 10); + if (maxfwd < 1) { + switch (r->method_number) { + case M_TRACE: { + int access_status; + r->proxyreq = PROXYREQ_NONE; + if ((access_status = ap_send_http_trace(r))) + ap_die(access_status, r); + else + ap_finalize_request_protocol(r); + return OK; + } + case M_OPTIONS: { + int access_status; + r->proxyreq = PROXYREQ_NONE; + if ((access_status = ap_send_http_options(r))) + ap_die(access_status, r); + else + ap_finalize_request_protocol(r); + return OK; + } + default: { + return ap_proxyerror(r, HTTP_BAD_GATEWAY, + "Max-Forwards has reached zero - proxy loop?"); + } + } + } + maxfwd = (maxfwd > 0) ? maxfwd - 1 : 0; + } + else { + /* set configured max-forwards */ + maxfwd = conf->maxfwd; + } + apr_table_set(r->headers_in, "Max-Forwards", + apr_psprintf(r->pool, "%ld", (maxfwd > 0) ? maxfwd : 0)); + + if (r->method_number == M_TRACE) { + core_server_config *coreconf = (core_server_config *) + ap_get_module_config(sconf, &core_module); + + 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, + "proxy: TRACE forbidden by server configuration"); + return HTTP_FORBIDDEN; + } + + /* 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, + "proxy: TRACE with request body is not allowed"); + return HTTP_REQUEST_ENTITY_TOO_LARGE; + } + } + + url = r->filename + 6; + p = strchr(url, ':'); + if (p == NULL) + 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, url, conf->domain); + if (ap_is_HTTP_REDIRECT(rc)) + return HTTP_MOVED_PERMANENTLY; + } + + *p = '\0'; + scheme = apr_pstrdup(r->pool, url); + *p = ':'; + + /* Check URI's destination host against NoProxy hosts */ + /* Bypass ProxyRemote server lookup if configured as NoProxy */ + /* we only know how to handle communication to a proxy via http */ + /*if (strcasecmp(scheme, "http") == 0) */ + { + int ii; + struct dirconn_entry *list = (struct dirconn_entry *) conf->dirconn->elts; + + for (direct_connect = ii = 0; ii < conf->dirconn->nelts && !direct_connect; ii++) { + direct_connect = list[ii].matcher(&list[ii], r); + } +#if DEBUGGING + ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, + (direct_connect) ? "NoProxy for %s" : "UseProxy for %s", + r->uri); +#endif + } + + /* 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 && strcasecmp(scheme, ents[i].scheme) == 0) || + (p2 != NULL && + strncasecmp(url, ents[i].scheme, strlen(ents[i].scheme)) == 0)) { + + /* handle the scheme */ + ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, r->server, + "Trying to run scheme_handler against proxy"); + access_status = proxy_run_scheme_handler(r, conf, url, ents[i].hostname, ents[i].port); + + /* an error or success */ + if (access_status != DECLINED && access_status != HTTP_BAD_GATEWAY) { + return access_status; + } + /* we failed to talk to the upstream proxy */ + } + } + } + + /* 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_error(APLOG_MARK, APLOG_DEBUG, 0, r->server, + "Trying to run scheme_handler"); + access_status = proxy_run_scheme_handler(r, conf, url, NULL, 0); + if (DECLINED == access_status) { + ap_log_error(APLOG_MARK, APLOG_WARNING, 0, r->server, + "proxy: No protocol handler was valid for the URL %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); + return HTTP_FORBIDDEN; + } + 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->raliases = 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->allowed_connect_ports = apr_array_make(p, 10, sizeof(int)); + ps->domain = NULL; + ps->viaopt = via_off; /* initially backward compatible with 1.3.1 */ + ps->viaopt_set = 0; /* 0 means default */ + ps->req = 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->error_override = 0; + ps->error_override_set = 0; + ps->preserve_host_set = 0; + ps->preserve_host = 0; + ps->timeout = 0; + ps->timeout_set = 0; + ps->badopt = bad_error; + ps->badopt_set = 0; + return ps; +} + +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->proxies = apr_array_append(p, base->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->raliases = apr_array_append(p, base->raliases, overrides->raliases); + ps->noproxies = apr_array_append(p, base->noproxies, overrides->noproxies); + ps->dirconn = apr_array_append(p, base->dirconn, overrides->dirconn); + ps->allowed_connect_ports = apr_array_append(p, base->allowed_connect_ports, overrides->allowed_connect_ports); + + ps->domain = (overrides->domain == NULL) ? base->domain : overrides->domain; + 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->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->error_override = (overrides->error_override_set == 0) ? base->error_override : overrides->error_override; + ps->error_override_set = overrides->error_override_set || base->error_override_set; + ps->preserve_host = (overrides->preserve_host_set == 0) ? base->preserve_host : overrides->preserve_host; + ps->preserve_host_set = overrides->preserve_host_set || base->preserve_host_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; + + return ps; +} + +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 */ + + return (void *) new; +} + +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->ftp_directory_charset = add->ftp_directory_charset ? + add->ftp_directory_charset : + base->ftp_directory_charset; + 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; + 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, 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); +} + +static const char * + add_pass(cmd_parms *cmd, void *dummy, const char *f, const char *r) +{ + 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; + if (r!=NULL && cmd->path == NULL ) { + new = apr_array_push(conf->aliases); + new->fake = f; + new->real = r; + } else if (r==NULL && cmd->path != NULL) { + new = apr_array_push(conf->aliases); + new->fake = cmd->path; + new->real = f; + } else { + if ( r== NULL) + return "ProxyPass needs a path when not defined in a location"; + else + return "ProxyPass can not have a path when defined in a location"; + } + + return NULL; +} + +static const char * + add_pass_reverse(cmd_parms *cmd, void *dummy, const char *f, const char *r) +{ + server_rec *s = cmd->server; + proxy_server_conf *conf; + struct proxy_alias *new; + + conf = (proxy_server_conf *)ap_get_module_config(s->module_config, + &proxy_module); + if (r!=NULL && cmd->path == NULL ) { + new = apr_array_push(conf->raliases); + new->fake = f; + new->real = r; + } else if (r==NULL && cmd->path != NULL) { + new = apr_array_push(conf->raliases); + new->fake = cmd->path; + new->real = f; + } else { + if ( r == NULL) + return "ProxyPassReverse needs a path when not defined in a location"; + else + return "ProxyPassReverse can not have a path when defined in a location"; + } + + 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 (apr_strnatcasecmp(arg, list[i].name) == 0) { /* ignore case for host names */ + found = 1; + } + } + + 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; +} + +/* + * Set the ports CONNECT can use + */ +static const char * + set_allowed_ports(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); + int *New; + + if (!apr_isdigit(arg[0])) + return "AllowCONNECT: port number must be numeric"; + + New = apr_array_push(conf->allowed_connect_ports); + *New = atoi(arg); + 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; + } + + 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, + "Parsed addr %s", inet_ntoa(New->addr)); + ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, + "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, + "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, + "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 *dummy, int flag) +{ + proxy_server_conf *psf = + ap_get_module_config(parms->server->module_config, &proxy_module); + + psf->error_override = flag; + psf->error_override_set = 1; + return NULL; +} +static const char * + set_preserve_host(cmd_parms *parms, void *dummy, int flag) +{ + proxy_server_conf *psf = + ap_get_module_config(parms->server->module_config, &proxy_module); + + psf->preserve_host = flag; + psf->preserve_host_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); + + psf->io_buffer_size = ((s > AP_IOBUFSIZE) ? 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); + if (s < 0) { + return "ProxyMaxForwards must be greater or equal to zero.."; + } + + 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_ftp_directory_charset(cmd_parms *cmd, void *dconf, + const char *arg) +{ + proxy_dir_conf *conf = dconf; + + conf->ftp_directory_charset = arg; + 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); + regex_t *r = NULL; + const command_rec *thiscmd = cmd->cmd; + + const char *err = ap_check_cmd_context(cmd, + NOT_IN_DIR_LOC_FILE|NOT_IN_LIMIT); + 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; + + 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, REG_EXTENDED); + if (!r) { + return "Regex could not be compiled"; + } + } + else if (!strcmp(cmd->path, "~")) { + cmd->path = ap_getword_conf(cmd->pool, &arg); + if (!cmd->path) + return "<Proxy ~ > block must specify a path"; + if (strncasecmp(cmd->path, "proxy:", 6)) + cmd->path += 6; + r = ap_pregcomp(cmd->pool, cmd->path, REG_EXTENDED); + if (!r) { + return "Regex could not be compiled"; + } + } + + /* 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); + + ap_add_per_proxy_conf(cmd->server, new_dir_conf); + + if (*arg != '\0') { + return apr_pstrcat(cmd->pool, "Multiple ", thiscmd->name, + "> arguments not (yet) supported.", 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_TAKE12("ProxyPass", add_pass, NULL, RSRC_CONF|ACCESS_CONF, + "a virtual path and a URL"), + AP_INIT_TAKE12("ProxyPassReverse", add_pass_reverse, NULL, RSRC_CONF|ACCESS_CONF, + "a virtual path and a URL for reverse proxy behaviour"), + 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_ITERATE("AllowCONNECT", set_allowed_ports, NULL, RSRC_CONF, + "A list of ports which CONNECT may connect to"), + AP_INIT_TAKE1("ProxyVia", set_via_opt, NULL, RSRC_CONF, + "Configure Via: proxy header header to one of: on | off | block | full"), + AP_INIT_FLAG("ProxyErrorOverride", set_proxy_error_override, NULL, RSRC_CONF, + "use our error handling pages instead of the servers' we are proxying"), + AP_INIT_FLAG("ProxyPreserveHost", set_preserve_host, NULL, RSRC_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_TAKE1("ProxyFtpDirCharset", set_ftp_directory_charset, NULL, + RSRC_CONF|ACCESS_CONF, "Define the character set for proxied FTP listings"), + {NULL} +}; + +APR_DECLARE_OPTIONAL_FN(int, ssl_proxy_enable, (conn_rec *)); +APR_DECLARE_OPTIONAL_FN(int, ssl_engine_disable, (conn_rec *)); + +static APR_OPTIONAL_FN_TYPE(ssl_proxy_enable) *proxy_ssl_enable = NULL; +static APR_OPTIONAL_FN_TYPE(ssl_engine_disable) *proxy_ssl_disable = 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 (proxy_ssl_enable) { + return c ? proxy_ssl_enable(c) : 1; + } + + return 0; +} + +PROXY_DECLARE(int) ap_proxy_ssl_disable(conn_rec *c) +{ + if (proxy_ssl_disable) { + return proxy_ssl_disable(c); + } + + return 0; +} + +static int proxy_post_config(apr_pool_t *pconf, apr_pool_t *plog, + apr_pool_t *ptemp, server_rec *s) +{ + proxy_ssl_enable = APR_RETRIEVE_OPTIONAL_FN(ssl_proxy_enable); + proxy_ssl_disable = APR_RETRIEVE_OPTIONAL_FN(ssl_engine_disable); + + 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 }; + + /* handler */ + ap_hook_handler(proxy_handler, NULL, NULL, APR_HOOK_FIRST); + /* filename-to-URI translation */ + ap_hook_translate_name(proxy_trans, NULL, 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); + /* post config handling */ + ap_hook_post_config(proxy_post_config, NULL, NULL, APR_HOOK_MIDDLE); +} + +module AP_MODULE_DECLARE_DATA proxy_module = +{ + 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_IMPLEMENT_EXTERNAL_HOOK_RUN_FIRST(proxy, PROXY, int, scheme_handler, + (request_rec *r, proxy_server_conf *conf, + char *url, const char *proxyhost, + apr_port_t proxyport),(r,conf,url, + proxyhost,proxyport),DECLINED) +APR_IMPLEMENT_EXTERNAL_HOOK_RUN_FIRST(proxy, PROXY, int, canon_handler, + (request_rec *r, char *url),(r, + url),DECLINED) +APR_IMPLEMENT_OPTIONAL_HOOK_RUN_ALL(proxy, PROXY, int, fixups, + (request_rec *r), (r), + OK, DECLINED) |