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apache/modules/proxy/mod_proxy.c
Joe Orton 3ca3524c31 Move mod_ssl-internal interfaces into ssl_private.h; allow mod_ssl.h 
to be included even when mod_ssl is not enabled.

* Makefile.in (install-include): Only install mod_ssl.h.

* modules/ssl/ssl_private.h: New file.

* modules/ssl/mod_ssl.h: Move everything apart from than the optional
hook definitions into ssl_private.h.

* modules/ssl/*.c: Include ssl_private.h not mod_ssl.h

* modules/ssl/config.m4: Always add the mod_ssl directory to the
include path so other modules can find mod_ssl.h.

* modules/proxy/mod_proxy.c: Include mod_ssl.h to pick up the optional
hook definitions rather than copy'n'pasting them.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@102803 13f79535-47bb-0310-9956-ffa450edef68
2004-02-28 18:06:35 +00:00

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/* Copyright 1999-2004 The Apache Software Foundation
*
* Licensed 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"
#include "mod_ssl.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));
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)) ||
(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->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->io_buffer_size = (overrides->io_buffer_size_set == 0) ? base->io_buffer_size : overrides->io_buffer_size;
ps->maxfwd = (overrides->maxfwd_set == 0) ? base->maxfwd : overrides->maxfwd;
ps->error_override = (overrides->error_override_set == 0) ? base->error_override : overrides->error_override;
ps->preserve_host = (overrides->preserve_host_set == 0) ? base->preserve_host : overrides->preserve_host;
ps->timeout= (overrides->timeout_set == 0) ? base->timeout : overrides->timeout;
ps->badopt = (overrides->badopt_set == 0) ? base->badopt : overrides->badopt;
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;
new->p = add->p;
new->p_is_fnmatch = add->p_is_fnmatch;
new->r = add->r;
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 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);
}
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);
}
/* 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"),
{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;
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)
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