/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
* Portions of this software are based upon public domain software
* originally written at the National Center for Supercomputing Applications,
* University of Illinois, Urbana-Champaign.
*/
#include "mod_proxy.h"
#define CORE_PRIVATE
#include "http_log.h"
#include "http_vhost.h"
#include "http_request.h"
/* Some WWW schemes and their default ports; this is basically /etc/services */
/* This will become global when the protocol abstraction comes */
static struct proxy_services defports[] =
{
{"http", DEFAULT_HTTP_PORT},
{"ftp", DEFAULT_FTP_PORT},
{"https", DEFAULT_HTTPS_PORT},
{"gopher", DEFAULT_GOPHER_PORT},
{"nntp", DEFAULT_NNTP_PORT},
{"wais", DEFAULT_WAIS_PORT},
{"snews", DEFAULT_SNEWS_PORT},
{"prospero", DEFAULT_PROSPERO_PORT},
{NULL, -1} /* unknown port */
};
/*
* A Web proxy module. Stages:
*
* translate_name: set filename to proxy:<URL>
* 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);
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,
r->parsed_uri.port_str ? r->parsed_uri.port : ap_default_port(r)))) {
r->proxyreq = STD_PROXY;
r->uri = r->unparsed_uri;
r->filename = ap_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 = STD_PROXY;
r->uri = r->unparsed_uri;
r->filename = ap_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 != NOT_PROXY) {
/* 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) {
r->filename = ap_pstrcat(r->pool, "proxy:", ent[i].real,
r->uri + len, NULL);
r->handler = "proxy-server";
r->proxyreq = PROXY_PASS;
return OK;
}
}
return DECLINED;
}
/* -------------------------------------------------------------- */
/* Fixup the filename */
/*
* Canonicalise the URL
*/
static int proxy_fixup(request_rec *r)
{
char *url, *p;
if (r->proxyreq == NOT_PROXY || strncmp(r->filename, "proxy:", 6) != 0)
return DECLINED;
url = &r->filename[6];
/* canonicalise each specific scheme */
if (strncasecmp(url, "http:", 5) == 0)
return ap_proxy_http_canon(r, url + 5, "http", DEFAULT_HTTP_PORT);
else if (strncasecmp(url, "ftp:", 4) == 0)
return ap_proxy_ftp_canon(r, url + 4);
p = strchr(url, ':');
if (p == NULL || p == url)
return HTTP_BAD_REQUEST;
return OK; /* otherwise; we've done the best we can */
}
static void proxy_init(server_rec *r, pool *p)
{
ap_proxy_garbage_init(r, p);
}
/* 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 == NOT_PROXY || 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 = ap_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 = ap_pstrcat(r->pool, r->parsed_uri.hostname,
domain, NULL);
nuri = ap_unparse_uri_components(r->pool,
&r->parsed_uri,
UNP_REVEALPASSWORD);
ap_table_set(r->headers_out, "Location", nuri);
ap_log_rerror(APLOG_MARK, APLOG_INFO|APLOG_NOERRNO, r,
"Domain missing: %s sent to %s%s%s", r->uri,
ap_unparse_uri_components(r->pool, &r->parsed_uri,
UNP_OMITUSERINFO),
ref ? " from " : "", ref ? ref : "");
return HTTP_MOVED_PERMANENTLY;
}
/* -------------------------------------------------------------- */
/* Invoke handler */
static int proxy_handler(request_rec *r)
{
char *url, *scheme, *p;
void *sconf = r->server->module_config;
proxy_server_conf *conf =
(proxy_server_conf *) ap_get_module_config(sconf, &proxy_module);
array_header *proxies = conf->proxies;
struct proxy_remote *ents = (struct proxy_remote *) proxies->elts;
int i, rc;
cache_req *cr;
int direct_connect = 0;
const char *maxfwd_str;
if (r->proxyreq == NOT_PROXY || strncmp(r->filename, "proxy:", 6) != 0)
return DECLINED;
if (r->method_number == M_TRACE &&
(maxfwd_str = ap_table_get(r->headers_in, "Max-Forwards")) != NULL) {
long maxfwd = strtol(maxfwd_str, NULL, 10);
if (maxfwd < 1) {
int access_status;
r->proxyreq = NOT_PROXY;
if ((access_status = ap_send_http_trace(r)))
ap_die(access_status, r);
else
ap_finalize_request_protocol(r);
return OK;
}
ap_table_setn(r->headers_in, "Max-Forwards",
ap_psprintf(r->pool, "%ld", (maxfwd > 0) ? maxfwd-1 : 0));
}
if ((rc = ap_setup_client_block(r, REQUEST_CHUNKED_ERROR)))
return rc;
url = r->filename + 6;
p = strchr(url, ':');
if (p == NULL)
return HTTP_BAD_REQUEST;
/* Try serve the request from the cache. If we succeed, we leave. */
rc = ap_proxy_cache_check(r, url, &conf->cache, &cr);
if (rc != DECLINED)
return rc;
/* 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 = ap_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|APLOG_NOERRNO, 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++) {
p = strchr(ents[i].scheme, ':'); /* is it a partial URL? */
if (strcmp(ents[i].scheme, "*") == 0 ||
(p == NULL && strcasecmp(scheme, ents[i].scheme) == 0) ||
(p != NULL &&
strncasecmp(url, ents[i].scheme, strlen(ents[i].scheme)) == 0)) {
/* CONNECT is a special method that bypasses the normal
* proxy code.
*/
if (r->method_number == M_CONNECT)
rc = ap_proxy_connect_handler(r, cr, url, ents[i].hostname,
ents[i].port);
/* we only know how to handle communication to a proxy via http */
else if (strcasecmp(ents[i].protocol, "http") == 0)
rc = ap_proxy_http_handler(r, cr, url, ents[i].hostname,
ents[i].port);
else
rc = DECLINED;
/* an error or success */
if (rc != DECLINED && rc != HTTP_BAD_GATEWAY)
return rc;
/* 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 */
if (r->method_number == M_CONNECT)
return ap_proxy_connect_handler(r, cr, url, NULL, 0);
if (strcasecmp(scheme, "http") == 0)
return ap_proxy_http_handler(r, cr, url, NULL, 0);
if (strcasecmp(scheme, "ftp") == 0)
return ap_proxy_ftp_handler(r, cr, url);
else
return HTTP_FORBIDDEN;
}
/* -------------------------------------------------------------- */
/* Setup configurable data */
static void *
create_proxy_config(pool *p, server_rec *s)
{
proxy_server_conf *ps = ap_pcalloc(p, sizeof(proxy_server_conf));
ps->proxies = ap_make_array(p, 10, sizeof(struct proxy_remote));
ps->aliases = ap_make_array(p, 10, sizeof(struct proxy_alias));
ps->raliases = ap_make_array(p, 10, sizeof(struct proxy_alias));
ps->noproxies = ap_make_array(p, 10, sizeof(struct noproxy_entry));
ps->dirconn = ap_make_array(p, 10, sizeof(struct dirconn_entry));
ps->nocaches = ap_make_array(p, 10, sizeof(struct nocache_entry));
ps->allowed_connect_ports = ap_make_array(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->cache.root = NULL;
ps->cache.space = DEFAULT_CACHE_SPACE;
ps->cache.space_set = 0;
ps->cache.maxexpire = DEFAULT_CACHE_MAXEXPIRE;
ps->cache.maxexpire_set = 0;
ps->cache.defaultexpire = DEFAULT_CACHE_EXPIRE;
ps->cache.defaultexpire_set = 0;
ps->cache.lmfactor = DEFAULT_CACHE_LMFACTOR;
ps->cache.lmfactor_set = 0;
ps->cache.gcinterval = DEFAULT_CACHE_GCINTERVAL;
ps->cache.gcinterval_set = 1;
/* at these levels, the cache can have 2^18 directories (256,000) */
ps->cache.dirlevels = 3;
ps->cache.dirlevels_set = 0;
ps->cache.dirlength = 1;
ps->cache.dirlength_set = 0;
ps->cache.cache_completion = (float)DEFAULT_CACHE_COMPLETION;
ps->cache.cache_completion_set = 0;
return ps;
}
static void *
merge_proxy_config(pool *p, void *basev,
void *overridesv)
{
proxy_server_conf *ps = ap_pcalloc(p, sizeof(proxy_server_conf));
proxy_server_conf *base = (proxy_server_conf *) basev;
proxy_server_conf *overrides = (proxy_server_conf *) overridesv;
ps->proxies = ap_append_arrays(p, base->proxies, overrides->proxies);
ps->aliases = ap_append_arrays(p, base->aliases, overrides->aliases);
ps->raliases = ap_append_arrays(p, base->raliases, overrides->raliases);
ps->noproxies = ap_append_arrays(p, base->noproxies, overrides->noproxies);
ps->dirconn = ap_append_arrays(p, base->dirconn, overrides->dirconn);
ps->nocaches = ap_append_arrays(p, base->nocaches, overrides->nocaches);
ps->allowed_connect_ports = ap_append_arrays(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->req = (overrides->req_set == 0) ? base->req : overrides->req;
ps->recv_buffer_size = (overrides->recv_buffer_size_set == 0) ? base->recv_buffer_size : overrides->recv_buffer_size;
ps->cache.root = (overrides->cache.root == NULL) ? base->cache.root : overrides->cache.root;
ps->cache.space = (overrides->cache.space_set == 0) ? base->cache.space : overrides->cache.space;
ps->cache.maxexpire = (overrides->cache.maxexpire_set == 0) ? base->cache.maxexpire : overrides->cache.maxexpire;
ps->cache.defaultexpire = (overrides->cache.defaultexpire_set == 0) ? base->cache.defaultexpire : overrides->cache.defaultexpire;
ps->cache.lmfactor = (overrides->cache.lmfactor_set == 0) ? base->cache.lmfactor : overrides->cache.lmfactor;
ps->cache.gcinterval = (overrides->cache.gcinterval_set == 0) ? base->cache.gcinterval : overrides->cache.gcinterval;
/* at these levels, the cache can have 2^18 directories (256,000) */
ps->cache.dirlevels = (overrides->cache.dirlevels_set == 0) ? base->cache.dirlevels : overrides->cache.dirlevels;
ps->cache.dirlength = (overrides->cache.dirlength_set == 0) ? base->cache.dirlength : overrides->cache.dirlength;
ps->cache.cache_completion = (overrides->cache.cache_completion_set == 0) ? base->cache.cache_completion : overrides->cache.cache_completion;
return ps;
}
static const char *
add_proxy(cmd_parms *cmd, void *dummy, char *f, 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_remote *new;
char *p, *q;
int port;
p = strchr(r, ':');
if (p == NULL || p[1] != '/' || p[2] != '/' || p[3] == '\0')
return "ProxyRemote: Bad syntax for a remote proxy server";
q = strchr(p + 3, ':');
if (q != NULL) {
if (sscanf(q + 1, "%u", &port) != 1 || port > 65535)
return "ProxyRemote: Bad syntax for a remote proxy server (bad port number)";
*q = '\0';
}
else
port = -1;
*p = '\0';
if (strchr(f, ':') == NULL)
ap_str_tolower(f); /* lowercase scheme */
ap_str_tolower(p + 3); /* lowercase hostname */
if (port == -1) {
int i;
for (i = 0; defports[i].scheme != NULL; i++)
if (strcasecmp(defports[i].scheme, r) == 0)
break;
port = defports[i].port;
}
new = ap_push_array(conf->proxies);
new->scheme = f;
new->protocol = r;
new->hostname = p + 3;
new->port = port;
return NULL;
}
static const char *
add_pass(cmd_parms *cmd, void *dummy, char *f, 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;
new = ap_push_array(conf->aliases);
new->fake = f;
new->real = r;
return NULL;
}
static const char *
add_pass_reverse(cmd_parms *cmd, void *dummy, char *f, 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);
new = ap_push_array(conf->raliases);
new->fake = f;
new->real = r;
return NULL;
}
static const char *
set_proxy_exclude(cmd_parms *parms, void *dummy, 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 hostent hp;
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;
}
if (!found) {
new = ap_push_array(conf->noproxies);
new->name = arg;
/* Don't do name lookups on things that aren't dotted */
if (strchr(arg, '.') != NULL && ap_proxy_host2addr(new->name, &hp) == NULL)
/*@@@FIXME: This copies only the first of (possibly many) IP addrs */
memcpy(&new->addr, hp.h_addr, sizeof(struct in_addr));
else
new->addr.s_addr = 0;
}
return NULL;
}
/*
* Set the ports CONNECT can use
*/
static const char *
set_allowed_ports(cmd_parms *parms, void *dummy, char *arg)
{
server_rec *s = parms->server;
proxy_server_conf *conf =
ap_get_module_config(s->module_config, &proxy_module);
int *New;
if (!ap_isdigit(arg[0]))
return "AllowCONNECT: port number must be numeric";
New = ap_push_array(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, 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 = ap_push_array(conf->dirconn);
New->name = arg;
New->hostentry = NULL;
if (ap_proxy_is_ipaddr(New, parms->pool)) {
#if DEBUGGING
fprintf(stderr, "Parsed addr %s\n", inet_ntoa(New->addr));
fprintf(stderr, "Parsed mask %s\n", inet_ntoa(New->mask));
#endif
}
else if (ap_proxy_is_domainname(New, parms->pool)) {
ap_str_tolower(New->name);
#if DEBUGGING
fprintf(stderr, "Parsed domain %s\n", New->name);
#endif
}
else if (ap_proxy_is_hostname(New, parms->pool)) {
ap_str_tolower(New->name);
#if DEBUGGING
fprintf(stderr, "Parsed host %s\n", 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, 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_cache_size(cmd_parms *parms, char *struct_ptr, char *arg)
{
proxy_server_conf *psf =
ap_get_module_config(parms->server->module_config, &proxy_module);
int val;
if (sscanf(arg, "%d", &val) != 1)
return "CacheSize value must be an integer (kBytes)";
psf->cache.space = val;
psf->cache.space_set = 1;
return NULL;
}
static const char *
set_cache_root(cmd_parms *parms, void *dummy, char *arg)
{
proxy_server_conf *psf =
ap_get_module_config(parms->server->module_config, &proxy_module);
psf->cache.root = arg;
return NULL;
}
static const char *
set_cache_factor(cmd_parms *parms, void *dummy, char *arg)
{
proxy_server_conf *psf =
ap_get_module_config(parms->server->module_config, &proxy_module);
double val;
if (sscanf(arg, "%lg", &val) != 1)
return "CacheLastModifiedFactor value must be a float";
psf->cache.lmfactor = val;
psf->cache.lmfactor_set = 1;
return NULL;
}
static const char *
set_cache_maxex(cmd_parms *parms, void *dummy, char *arg)
{
proxy_server_conf *psf =
ap_get_module_config(parms->server->module_config, &proxy_module);
double val;
if (sscanf(arg, "%lg", &val) != 1)
return "CacheMaxExpire value must be a float";
psf->cache.maxexpire = (int) (val * (double) SEC_ONE_HR);
psf->cache.maxexpire_set = 1;
return NULL;
}
static const char *
set_cache_defex(cmd_parms *parms, void *dummy, char *arg)
{
proxy_server_conf *psf =
ap_get_module_config(parms->server->module_config, &proxy_module);
double val;
if (sscanf(arg, "%lg", &val) != 1)
return "CacheDefaultExpire value must be a float";
psf->cache.defaultexpire = (int) (val * (double) SEC_ONE_HR);
psf->cache.defaultexpire_set = 1;
return NULL;
}
static const char *
set_cache_gcint(cmd_parms *parms, void *dummy, char *arg)
{
proxy_server_conf *psf =
ap_get_module_config(parms->server->module_config, &proxy_module);
double val;
if (sscanf(arg, "%lg", &val) != 1)
return "CacheGcInterval value must be a float";
psf->cache.gcinterval = (int) (val * (double) SEC_ONE_HR);
psf->cache.gcinterval_set = 1;
return NULL;
}
static const char *
set_cache_dirlevels(cmd_parms *parms, char *struct_ptr, char *arg)
{
proxy_server_conf *psf =
ap_get_module_config(parms->server->module_config, &proxy_module);
int val;
val = atoi(arg);
if (val < 1)
return "CacheDirLevels value must be an integer greater than 0";
if (val * psf->cache.dirlength > CACHEFILE_LEN)
return "CacheDirLevels*CacheDirLength value must not be higher than 20";
psf->cache.dirlevels = val;
psf->cache.dirlevels_set = 1;
return NULL;
}
static const char *
set_cache_dirlength(cmd_parms *parms, char *struct_ptr, char *arg)
{
proxy_server_conf *psf =
ap_get_module_config(parms->server->module_config, &proxy_module);
int val;
val = atoi(arg);
if (val < 1)
return "CacheDirLength value must be an integer greater than 0";
if (val * psf->cache.dirlevels > CACHEFILE_LEN)
return "CacheDirLevels*CacheDirLength value must not be higher than 20";
psf->cache.dirlength = val;
psf->cache.dirlength_set = 1;
return NULL;
}
static const char *
set_cache_exclude(cmd_parms *parms, void *dummy, char *arg)
{
server_rec *s = parms->server;
proxy_server_conf *conf =
ap_get_module_config(s->module_config, &proxy_module);
struct nocache_entry *new;
struct nocache_entry *list = (struct nocache_entry *) conf->nocaches->elts;
struct hostent hp;
int found = 0;
int i;
/* Don't duplicate entries */
for (i = 0; i < conf->nocaches->nelts; i++) {
if (strcasecmp(arg, list[i].name) == 0) /* ignore case for host names */
found = 1;
}
if (!found) {
new = ap_push_array(conf->nocaches);
new->name = arg;
/* Don't do name lookups on things that aren't dotted */
if (strchr(arg, '.') != NULL && ap_proxy_host2addr(new->name, &hp) == NULL)
/*@@@FIXME: This copies only the first of (possibly many) IP addrs */
memcpy(&new->addr, hp.h_addr, sizeof(struct in_addr));
else
new->addr.s_addr = 0;
}
return NULL;
}
static const char *
set_recv_buffer_size(cmd_parms *parms, void *dummy, 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_cache_completion(cmd_parms *parms, void *dummy, char *arg)
{
proxy_server_conf *psf =
ap_get_module_config(parms->server->module_config, &proxy_module);
int s = atoi(arg);
if (s > 100 || s < 0) {
return "CacheForceCompletion must be <= 100 percent, "
"or 0 for system default.";
}
if (s > 0)
psf->cache.cache_completion = ((float)s / 100);
psf->cache.cache_completion_set = 1;
return NULL;
}
static const char*
set_via_opt(cmd_parms *parms, void *dummy, 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 handler_rec proxy_handlers[] =
{
{"proxy-server", proxy_handler},
{NULL}
};
static const command_rec proxy_cmds[] =
{
{"ProxyRequests", set_proxy_req, NULL, RSRC_CONF, FLAG,
"on if the true proxy requests should be accepted"},
{"ProxyRemote", add_proxy, NULL, RSRC_CONF, TAKE2,
"a scheme, partial URL or '*' and a proxy server"},
{"ProxyPass", add_pass, NULL, RSRC_CONF, TAKE2,
"a virtual path and a URL"},
{"ProxyPassReverse", add_pass_reverse, NULL, RSRC_CONF, TAKE2,
"a virtual path and a URL for reverse proxy behaviour"},
{"ProxyBlock", set_proxy_exclude, NULL, RSRC_CONF, ITERATE,
"A list of names, hosts or domains to which the proxy will not connect"},
{"ProxyReceiveBufferSize", set_recv_buffer_size, NULL, RSRC_CONF, TAKE1,
"Receive buffer size for outgoing HTTP and FTP connections in bytes"},
{"NoProxy", set_proxy_dirconn, NULL, RSRC_CONF, ITERATE,
"A list of domains, hosts, or subnets to which the proxy will connect directly"},
{"ProxyDomain", set_proxy_domain, NULL, RSRC_CONF, TAKE1,
"The default intranet domain name (in absence of a domain in the URL)"},
{"AllowCONNECT", set_allowed_ports, NULL, RSRC_CONF, ITERATE,
"A list of ports which CONNECT may connect to"},
{"CacheRoot", set_cache_root, NULL, RSRC_CONF, TAKE1,
"The directory to store cache files"},
{"CacheSize", set_cache_size, NULL, RSRC_CONF, TAKE1,
"The maximum disk space used by the cache in Kb"},
{"CacheMaxExpire", set_cache_maxex, NULL, RSRC_CONF, TAKE1,
"The maximum time in hours to cache a document"},
{"CacheDefaultExpire", set_cache_defex, NULL, RSRC_CONF, TAKE1,
"The default time in hours to cache a document"},
{"CacheLastModifiedFactor", set_cache_factor, NULL, RSRC_CONF, TAKE1,
"The factor used to estimate Expires date from LastModified date"},
{"CacheGcInterval", set_cache_gcint, NULL, RSRC_CONF, TAKE1,
"The interval between garbage collections, in hours"},
{"CacheDirLevels", set_cache_dirlevels, NULL, RSRC_CONF, TAKE1,
"The number of levels of subdirectories in the cache"},
{"CacheDirLength", set_cache_dirlength, NULL, RSRC_CONF, TAKE1,
"The number of characters in subdirectory names"},
{"NoCache", set_cache_exclude, NULL, RSRC_CONF, ITERATE,
"A list of names, hosts or domains for which caching is *not* provided"},
{"CacheForceCompletion", set_cache_completion, NULL, RSRC_CONF, TAKE1,
"Force a http cache completion after this percentage is loaded"},
{"ProxyVia", set_via_opt, NULL, RSRC_CONF, TAKE1,
"Configure Via: proxy header header to one of: on | off | block | full"},
{NULL}
};
module MODULE_VAR_EXPORT proxy_module =
{
STANDARD_MODULE_STUFF,
proxy_init, /* initializer */
NULL, /* create per-directory config structure */
NULL, /* 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 */
proxy_handlers, /* handlers */
proxy_trans, /* translate_handler */
NULL, /* check_user_id */
NULL, /* check auth */
NULL, /* check access */
NULL, /* type_checker */
proxy_fixup, /* pre-run fixups */
NULL, /* logger */
NULL, /* header parser */
NULL, /* child_init */
NULL, /* child_exit */
proxy_detect /* post read-request */
};