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Copy pathcore.c
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3929 lines (3315 loc) · 122 KB
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/* Copyright 2001-2005 The Apache Software Foundation or its licensors, as
* applicable.
*
* 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.
*/
#include "apr.h"
#include "apr_strings.h"
#include "apr_lib.h"
#include "apr_fnmatch.h"
#include "apr_hash.h"
#include "apr_thread_proc.h" /* for RLIMIT stuff */
#include "apr_hooks.h"
#define APR_WANT_IOVEC
#define APR_WANT_STRFUNC
#define APR_WANT_MEMFUNC
#include "apr_want.h"
#define CORE_PRIVATE
#include "ap_config.h"
#include "httpd.h"
#include "http_config.h"
#include "http_core.h"
#include "http_protocol.h" /* For index_of_response(). Grump. */
#include "http_request.h"
#include "http_vhost.h"
#include "http_main.h" /* For the default_handler below... */
#include "http_log.h"
#include "util_md5.h"
#include "http_connection.h"
#include "apr_buckets.h"
#include "util_filter.h"
#include "util_ebcdic.h"
#include "mpm.h"
#include "mpm_common.h"
#include "scoreboard.h"
#include "mod_core.h"
#include "mod_proxy.h"
#include "ap_listen.h"
#include "mod_so.h" /* for ap_find_loaded_module_symbol */
/* LimitRequestBody handling */
#define AP_LIMIT_REQ_BODY_UNSET ((apr_off_t) -1)
#define AP_DEFAULT_LIMIT_REQ_BODY ((apr_off_t) 0)
/* LimitXMLRequestBody handling */
#define AP_LIMIT_UNSET ((long) -1)
#define AP_DEFAULT_LIMIT_XML_BODY ((size_t)1000000)
#define AP_MIN_SENDFILE_BYTES (256)
/* maximum include nesting level */
#ifndef AP_MAX_INCLUDE_DEPTH
#define AP_MAX_INCLUDE_DEPTH (128)
#endif
APR_HOOK_STRUCT(
APR_HOOK_LINK(get_mgmt_items)
)
AP_IMPLEMENT_HOOK_RUN_ALL(int, get_mgmt_items,
(apr_pool_t *p, const char *val, apr_hash_t *ht),
(p, val, ht), OK, DECLINED)
/* Server core module... This module provides support for really basic
* server operations, including options and commands which control the
* operation of other modules. Consider this the bureaucracy module.
*
* The core module also defines handlers, etc., do handle just enough
* to allow a server with the core module ONLY to actually serve documents
* (though it slaps DefaultType on all of 'em); this was useful in testing,
* but may not be worth preserving.
*
* This file could almost be mod_core.c, except for the stuff which affects
* the http_conf_globals.
*/
/* Handles for core filters */
AP_DECLARE_DATA ap_filter_rec_t *ap_subreq_core_filter_handle;
AP_DECLARE_DATA ap_filter_rec_t *ap_core_output_filter_handle;
AP_DECLARE_DATA ap_filter_rec_t *ap_content_length_filter_handle;
AP_DECLARE_DATA ap_filter_rec_t *ap_core_input_filter_handle;
/* magic pointer for ErrorDocument xxx "default" */
static char errordocument_default;
static void *create_core_dir_config(apr_pool_t *a, char *dir)
{
core_dir_config *conf;
int i;
conf = (core_dir_config *)apr_pcalloc(a, sizeof(core_dir_config));
/* conf->r and conf->d[_*] are initialized by dirsection() or left NULL */
conf->opts = dir ? OPT_UNSET : OPT_UNSET|OPT_ALL;
conf->opts_add = conf->opts_remove = OPT_NONE;
conf->override = dir ? OR_UNSET : OR_UNSET|OR_ALL;
conf->override_opts = OPT_UNSET | OPT_ALL | OPT_INCNOEXEC | OPT_SYM_OWNER
| OPT_MULTI;
conf->content_md5 = 2;
conf->accept_path_info = 3;
conf->use_canonical_name = USE_CANONICAL_NAME_UNSET;
conf->hostname_lookups = HOSTNAME_LOOKUP_UNSET;
conf->satisfy = apr_palloc(a, sizeof(*conf->satisfy) * METHODS);
for (i = 0; i < METHODS; ++i) {
conf->satisfy[i] = SATISFY_NOSPEC;
}
#ifdef RLIMIT_CPU
conf->limit_cpu = NULL;
#endif
#if defined(RLIMIT_DATA) || defined(RLIMIT_VMEM) || defined(RLIMIT_AS)
conf->limit_mem = NULL;
#endif
#ifdef RLIMIT_NPROC
conf->limit_nproc = NULL;
#endif
conf->limit_req_body = AP_LIMIT_REQ_BODY_UNSET;
conf->limit_xml_body = AP_LIMIT_UNSET;
conf->sec_file = apr_array_make(a, 2, sizeof(ap_conf_vector_t *));
conf->server_signature = srv_sig_unset;
conf->add_default_charset = ADD_DEFAULT_CHARSET_UNSET;
conf->add_default_charset_name = DEFAULT_ADD_DEFAULT_CHARSET_NAME;
/* Overriding all negotiation
*/
conf->mime_type = NULL;
conf->handler = NULL;
conf->output_filters = NULL;
conf->input_filters = NULL;
/*
* Flag for use of inodes in ETags.
*/
conf->etag_bits = ETAG_UNSET;
conf->etag_add = ETAG_UNSET;
conf->etag_remove = ETAG_UNSET;
conf->enable_mmap = ENABLE_MMAP_UNSET;
conf->enable_sendfile = ENABLE_SENDFILE_UNSET;
conf->allow_encoded_slashes = 0;
return (void *)conf;
}
/*
* Overlay one hash table of ct_output_filters onto another
*/
static void *merge_ct_filters(apr_pool_t *p,
const void *key,
apr_ssize_t klen,
const void *overlay_val,
const void *base_val,
const void *data)
{
ap_filter_rec_t *cur;
const ap_filter_rec_t *overlay_info = (const ap_filter_rec_t *)overlay_val;
const ap_filter_rec_t *base_info = (const ap_filter_rec_t *)base_val;
cur = NULL;
while (overlay_info) {
ap_filter_rec_t *new;
new = apr_pcalloc(p, sizeof(ap_filter_rec_t));
new->name = apr_pstrdup(p, overlay_info->name);
new->next = cur;
cur = new;
overlay_info = overlay_info->next;
}
while (base_info) {
ap_filter_rec_t *f;
int found = 0;
/* We can't have dups. */
f = cur;
while (f) {
if (!strcasecmp(base_info->name, f->name)) {
found = 1;
break;
}
f = f->next;
}
if (!found) {
f = apr_pcalloc(p, sizeof(ap_filter_rec_t));
f->name = apr_pstrdup(p, base_info->name);
f->next = cur;
cur = f;
}
base_info = base_info->next;
}
return cur;
}
static void *merge_core_dir_configs(apr_pool_t *a, void *basev, void *newv)
{
core_dir_config *base = (core_dir_config *)basev;
core_dir_config *new = (core_dir_config *)newv;
core_dir_config *conf;
int i;
/* Create this conf by duplicating the base, replacing elements
* (or creating copies for merging) where new-> values exist.
*/
conf = (core_dir_config *)apr_palloc(a, sizeof(core_dir_config));
memcpy(conf, base, sizeof(core_dir_config));
conf->d = new->d;
conf->d_is_fnmatch = new->d_is_fnmatch;
conf->d_components = new->d_components;
conf->r = new->r;
if (new->opts & OPT_UNSET) {
/* there was no explicit setting of new->opts, so we merge
* preserve the invariant (opts_add & opts_remove) == 0
*/
conf->opts_add = (conf->opts_add & ~new->opts_remove) | new->opts_add;
conf->opts_remove = (conf->opts_remove & ~new->opts_add)
| new->opts_remove;
conf->opts = (conf->opts & ~conf->opts_remove) | conf->opts_add;
if ((base->opts & OPT_INCNOEXEC) && (new->opts & OPT_INCLUDES)) {
conf->opts = (conf->opts & ~OPT_INCNOEXEC) | OPT_INCLUDES;
}
}
else {
/* otherwise we just copy, because an explicit opts setting
* overrides all earlier +/- modifiers
*/
conf->opts = new->opts;
conf->opts_add = new->opts_add;
conf->opts_remove = new->opts_remove;
}
if (!(new->override & OR_UNSET)) {
conf->override = new->override;
}
if (!(new->override_opts & OPT_UNSET)) {
conf->override_opts = new->override_opts;
}
if (new->ap_default_type) {
conf->ap_default_type = new->ap_default_type;
}
if (new->ap_auth_type) {
conf->ap_auth_type = new->ap_auth_type;
}
if (new->ap_auth_name) {
conf->ap_auth_name = new->ap_auth_name;
}
if (new->ap_requires) {
conf->ap_requires = new->ap_requires;
}
if (conf->response_code_strings == NULL) {
conf->response_code_strings = new->response_code_strings;
}
else if (new->response_code_strings != NULL) {
/* If we merge, the merge-result must have it's own array
*/
conf->response_code_strings = apr_palloc(a,
sizeof(*conf->response_code_strings) * RESPONSE_CODES);
memcpy(conf->response_code_strings, base->response_code_strings,
sizeof(*conf->response_code_strings) * RESPONSE_CODES);
for (i = 0; i < RESPONSE_CODES; ++i) {
if (new->response_code_strings[i] != NULL) {
conf->response_code_strings[i] = new->response_code_strings[i];
}
}
}
/* Otherwise we simply use the base->response_code_strings array
*/
if (new->hostname_lookups != HOSTNAME_LOOKUP_UNSET) {
conf->hostname_lookups = new->hostname_lookups;
}
if ((new->content_md5 & 2) == 0) {
conf->content_md5 = new->content_md5;
}
if (new->accept_path_info != 3) {
conf->accept_path_info = new->accept_path_info;
}
if (new->use_canonical_name != USE_CANONICAL_NAME_UNSET) {
conf->use_canonical_name = new->use_canonical_name;
}
#ifdef RLIMIT_CPU
if (new->limit_cpu) {
conf->limit_cpu = new->limit_cpu;
}
#endif
#if defined(RLIMIT_DATA) || defined(RLIMIT_VMEM) || defined(RLIMIT_AS)
if (new->limit_mem) {
conf->limit_mem = new->limit_mem;
}
#endif
#ifdef RLIMIT_NPROC
if (new->limit_nproc) {
conf->limit_nproc = new->limit_nproc;
}
#endif
if (new->limit_req_body != AP_LIMIT_REQ_BODY_UNSET) {
conf->limit_req_body = new->limit_req_body;
}
if (new->limit_xml_body != AP_LIMIT_UNSET)
conf->limit_xml_body = new->limit_xml_body;
else
conf->limit_xml_body = base->limit_xml_body;
if (!conf->sec_file) {
conf->sec_file = new->sec_file;
}
else if (new->sec_file) {
/* If we merge, the merge-result must have it's own array
*/
conf->sec_file = apr_array_append(a, base->sec_file, new->sec_file);
}
/* Otherwise we simply use the base->sec_file array
*/
/* use a separate ->satisfy[] array either way */
conf->satisfy = apr_palloc(a, sizeof(*conf->satisfy) * METHODS);
for (i = 0; i < METHODS; ++i) {
if (new->satisfy[i] != SATISFY_NOSPEC) {
conf->satisfy[i] = new->satisfy[i];
} else {
conf->satisfy[i] = base->satisfy[i];
}
}
if (new->server_signature != srv_sig_unset) {
conf->server_signature = new->server_signature;
}
if (new->add_default_charset != ADD_DEFAULT_CHARSET_UNSET) {
conf->add_default_charset = new->add_default_charset;
conf->add_default_charset_name = new->add_default_charset_name;
}
/* Overriding all negotiation
*/
if (new->mime_type) {
conf->mime_type = new->mime_type;
}
if (new->handler) {
conf->handler = new->handler;
}
if (new->output_filters) {
conf->output_filters = new->output_filters;
}
if (new->input_filters) {
conf->input_filters = new->input_filters;
}
if (conf->ct_output_filters && new->ct_output_filters) {
conf->ct_output_filters = apr_hash_merge(a,
new->ct_output_filters,
conf->ct_output_filters,
merge_ct_filters,
NULL);
}
else if (new->ct_output_filters) {
conf->ct_output_filters = apr_hash_copy(a, new->ct_output_filters);
}
else if (conf->ct_output_filters) {
/* That memcpy above isn't enough. */
conf->ct_output_filters = apr_hash_copy(a, base->ct_output_filters);
}
/*
* Now merge the setting of the FileETag directive.
*/
if (new->etag_bits == ETAG_UNSET) {
conf->etag_add =
(conf->etag_add & (~ new->etag_remove)) | new->etag_add;
conf->etag_remove =
(conf->opts_remove & (~ new->etag_add)) | new->etag_remove;
conf->etag_bits =
(conf->etag_bits & (~ conf->etag_remove)) | conf->etag_add;
}
else {
conf->etag_bits = new->etag_bits;
conf->etag_add = new->etag_add;
conf->etag_remove = new->etag_remove;
}
if (conf->etag_bits != ETAG_NONE) {
conf->etag_bits &= (~ ETAG_NONE);
}
if (new->enable_mmap != ENABLE_MMAP_UNSET) {
conf->enable_mmap = new->enable_mmap;
}
if (new->enable_sendfile != ENABLE_SENDFILE_UNSET) {
conf->enable_sendfile = new->enable_sendfile;
}
conf->allow_encoded_slashes = new->allow_encoded_slashes;
return (void*)conf;
}
static void *create_core_server_config(apr_pool_t *a, server_rec *s)
{
core_server_config *conf;
int is_virtual = s->is_virtual;
conf = (core_server_config *)apr_pcalloc(a, sizeof(core_server_config));
#ifdef GPROF
conf->gprof_dir = NULL;
#endif
conf->access_name = is_virtual ? NULL : DEFAULT_ACCESS_FNAME;
conf->ap_document_root = is_virtual ? NULL : DOCUMENT_LOCATION;
conf->sec_dir = apr_array_make(a, 40, sizeof(ap_conf_vector_t *));
conf->sec_url = apr_array_make(a, 40, sizeof(ap_conf_vector_t *));
/* recursion stopper */
conf->redirect_limit = 0; /* 0 == unset */
conf->subreq_limit = 0;
conf->protocol = NULL;
conf->accf_map = apr_table_make(a, 5);
#ifdef APR_TCP_DEFER_ACCEPT
apr_table_set(conf->accf_map, "http", "data");
apr_table_set(conf->accf_map, "https", "data");
#endif
#if APR_HAS_SO_ACCEPTFILTER
#ifndef ACCEPT_FILTER_NAME
#define ACCEPT_FILTER_NAME "httpready"
#ifdef __FreeBSD_version
#if __FreeBSD_version < 411000 /* httpready broken before 4.1.1 */
#undef ACCEPT_FILTER_NAME
#define ACCEPT_FILTER_NAME "dataready"
#endif
#endif
#endif
apr_table_set(conf->accf_map, "http", ACCEPT_FILTER_NAME);
apr_table_set(conf->accf_map, "https", "dataready");
#endif
conf->trace_enable = AP_TRACE_UNSET;
return (void *)conf;
}
static void *merge_core_server_configs(apr_pool_t *p, void *basev, void *virtv)
{
core_server_config *base = (core_server_config *)basev;
core_server_config *virt = (core_server_config *)virtv;
core_server_config *conf;
conf = (core_server_config *)apr_palloc(p, sizeof(core_server_config));
memcpy(conf, virt, sizeof(core_server_config));
if (!conf->access_name) {
conf->access_name = base->access_name;
}
if (!conf->ap_document_root) {
conf->ap_document_root = base->ap_document_root;
}
if (!conf->protocol) {
conf->protocol = base->protocol;
}
conf->sec_dir = apr_array_append(p, base->sec_dir, virt->sec_dir);
conf->sec_url = apr_array_append(p, base->sec_url, virt->sec_url);
conf->redirect_limit = virt->redirect_limit
? virt->redirect_limit
: base->redirect_limit;
conf->subreq_limit = virt->subreq_limit
? virt->subreq_limit
: base->subreq_limit;
conf->trace_enable = (virt->trace_enable != AP_TRACE_UNSET)
? virt->trace_enable
: base->trace_enable;
return conf;
}
/* Add per-directory configuration entry (for <directory> section);
* these are part of the core server config.
*/
AP_CORE_DECLARE(void) ap_add_per_dir_conf(server_rec *s, void *dir_config)
{
core_server_config *sconf = ap_get_module_config(s->module_config,
&core_module);
void **new_space = (void **)apr_array_push(sconf->sec_dir);
*new_space = dir_config;
}
AP_CORE_DECLARE(void) ap_add_per_url_conf(server_rec *s, void *url_config)
{
core_server_config *sconf = ap_get_module_config(s->module_config,
&core_module);
void **new_space = (void **)apr_array_push(sconf->sec_url);
*new_space = url_config;
}
AP_CORE_DECLARE(void) ap_add_file_conf(core_dir_config *conf, void *url_config)
{
void **new_space = (void **)apr_array_push(conf->sec_file);
*new_space = url_config;
}
/* We need to do a stable sort, qsort isn't stable. So to make it stable
* we'll be maintaining the original index into the list, and using it
* as the minor key during sorting. The major key is the number of
* components (where the root component is zero).
*/
struct reorder_sort_rec {
ap_conf_vector_t *elt;
int orig_index;
};
static int reorder_sorter(const void *va, const void *vb)
{
const struct reorder_sort_rec *a = va;
const struct reorder_sort_rec *b = vb;
core_dir_config *core_a;
core_dir_config *core_b;
core_a = ap_get_module_config(a->elt, &core_module);
core_b = ap_get_module_config(b->elt, &core_module);
/* a regex always sorts after a non-regex
*/
if (!core_a->r && core_b->r) {
return -1;
}
else if (core_a->r && !core_b->r) {
return 1;
}
/* we always sort next by the number of components
*/
if (core_a->d_components < core_b->d_components) {
return -1;
}
else if (core_a->d_components > core_b->d_components) {
return 1;
}
/* They have the same number of components, we now have to compare
* the minor key to maintain the original order (from the config.)
*/
return a->orig_index - b->orig_index;
}
void ap_core_reorder_directories(apr_pool_t *p, server_rec *s)
{
core_server_config *sconf;
apr_array_header_t *sec_dir;
struct reorder_sort_rec *sortbin;
int nelts;
ap_conf_vector_t **elts;
int i;
apr_pool_t *tmp;
sconf = ap_get_module_config(s->module_config, &core_module);
sec_dir = sconf->sec_dir;
nelts = sec_dir->nelts;
elts = (ap_conf_vector_t **)sec_dir->elts;
if (!nelts) {
/* simple case of already being sorted... */
/* We're not checking this condition to be fast... we're checking
* it to avoid trying to palloc zero bytes, which can trigger some
* memory debuggers to barf
*/
return;
}
/* we have to allocate tmp space to do a stable sort */
apr_pool_create(&tmp, p);
sortbin = apr_palloc(tmp, sec_dir->nelts * sizeof(*sortbin));
for (i = 0; i < nelts; ++i) {
sortbin[i].orig_index = i;
sortbin[i].elt = elts[i];
}
qsort(sortbin, nelts, sizeof(*sortbin), reorder_sorter);
/* and now copy back to the original array */
for (i = 0; i < nelts; ++i) {
elts[i] = sortbin[i].elt;
}
apr_pool_destroy(tmp);
}
/*****************************************************************
*
* There are some elements of the core config structures in which
* other modules have a legitimate interest (this is ugly, but necessary
* to preserve NCSA back-compatibility). So, we have a bunch of accessors
* here...
*/
AP_DECLARE(int) ap_allow_options(request_rec *r)
{
core_dir_config *conf =
(core_dir_config *)ap_get_module_config(r->per_dir_config, &core_module);
return conf->opts;
}
AP_DECLARE(int) ap_allow_overrides(request_rec *r)
{
core_dir_config *conf;
conf = (core_dir_config *)ap_get_module_config(r->per_dir_config,
&core_module);
return conf->override;
}
AP_DECLARE(const char *) ap_auth_type(request_rec *r)
{
core_dir_config *conf;
conf = (core_dir_config *)ap_get_module_config(r->per_dir_config,
&core_module);
return conf->ap_auth_type;
}
AP_DECLARE(const char *) ap_auth_name(request_rec *r)
{
core_dir_config *conf;
conf = (core_dir_config *)ap_get_module_config(r->per_dir_config,
&core_module);
return conf->ap_auth_name;
}
AP_DECLARE(const char *) ap_default_type(request_rec *r)
{
core_dir_config *conf;
conf = (core_dir_config *)ap_get_module_config(r->per_dir_config,
&core_module);
return conf->ap_default_type
? conf->ap_default_type
: DEFAULT_CONTENT_TYPE;
}
AP_DECLARE(const char *) ap_document_root(request_rec *r) /* Don't use this! */
{
core_server_config *conf;
conf = (core_server_config *)ap_get_module_config(r->server->module_config,
&core_module);
return conf->ap_document_root;
}
AP_DECLARE(const apr_array_header_t *) ap_requires(request_rec *r)
{
core_dir_config *conf;
conf = (core_dir_config *)ap_get_module_config(r->per_dir_config,
&core_module);
return conf->ap_requires;
}
AP_DECLARE(int) ap_satisfies(request_rec *r)
{
core_dir_config *conf;
conf = (core_dir_config *)ap_get_module_config(r->per_dir_config,
&core_module);
return conf->satisfy[r->method_number];
}
/* Should probably just get rid of this... the only code that cares is
* part of the core anyway (and in fact, it isn't publicised to other
* modules).
*/
char *ap_response_code_string(request_rec *r, int error_index)
{
core_dir_config *dirconf;
core_request_config *reqconf;
/* check for string registered via ap_custom_response() first */
reqconf = (core_request_config *)ap_get_module_config(r->request_config,
&core_module);
if (reqconf->response_code_strings != NULL &&
reqconf->response_code_strings[error_index] != NULL) {
return reqconf->response_code_strings[error_index];
}
/* check for string specified via ErrorDocument */
dirconf = (core_dir_config *)ap_get_module_config(r->per_dir_config,
&core_module);
if (dirconf->response_code_strings == NULL) {
return NULL;
}
if (dirconf->response_code_strings[error_index] == &errordocument_default) {
return NULL;
}
return dirconf->response_code_strings[error_index];
}
/* Code from Harald Hanche-Olsen <[email protected]> */
static APR_INLINE void do_double_reverse (conn_rec *conn)
{
apr_sockaddr_t *sa;
apr_status_t rv;
if (conn->double_reverse) {
/* already done */
return;
}
if (conn->remote_host == NULL || conn->remote_host[0] == '\0') {
/* single reverse failed, so don't bother */
conn->double_reverse = -1;
return;
}
rv = apr_sockaddr_info_get(&sa, conn->remote_host, APR_UNSPEC, 0, 0, conn->pool);
if (rv == APR_SUCCESS) {
while (sa) {
if (apr_sockaddr_equal(sa, conn->remote_addr)) {
conn->double_reverse = 1;
return;
}
sa = sa->next;
}
}
conn->double_reverse = -1;
}
AP_DECLARE(const char *) ap_get_remote_host(conn_rec *conn, void *dir_config,
int type, int *str_is_ip)
{
int hostname_lookups;
int ignored_str_is_ip;
if (!str_is_ip) { /* caller doesn't want to know */
str_is_ip = &ignored_str_is_ip;
}
*str_is_ip = 0;
/* If we haven't checked the host name, and we want to */
if (dir_config) {
hostname_lookups =
((core_dir_config *)ap_get_module_config(dir_config, &core_module))
->hostname_lookups;
if (hostname_lookups == HOSTNAME_LOOKUP_UNSET) {
hostname_lookups = HOSTNAME_LOOKUP_OFF;
}
}
else {
/* the default */
hostname_lookups = HOSTNAME_LOOKUP_OFF;
}
if (type != REMOTE_NOLOOKUP
&& conn->remote_host == NULL
&& (type == REMOTE_DOUBLE_REV
|| hostname_lookups != HOSTNAME_LOOKUP_OFF)) {
if (apr_getnameinfo(&conn->remote_host, conn->remote_addr, 0)
== APR_SUCCESS) {
ap_str_tolower(conn->remote_host);
if (hostname_lookups == HOSTNAME_LOOKUP_DOUBLE) {
do_double_reverse(conn);
if (conn->double_reverse != 1) {
conn->remote_host = NULL;
}
}
}
/* if failed, set it to the NULL string to indicate error */
if (conn->remote_host == NULL) {
conn->remote_host = "";
}
}
if (type == REMOTE_DOUBLE_REV) {
do_double_reverse(conn);
if (conn->double_reverse == -1) {
return NULL;
}
}
/*
* Return the desired information; either the remote DNS name, if found,
* or either NULL (if the hostname was requested) or the IP address
* (if any identifier was requested).
*/
if (conn->remote_host != NULL && conn->remote_host[0] != '\0') {
return conn->remote_host;
}
else {
if (type == REMOTE_HOST || type == REMOTE_DOUBLE_REV) {
return NULL;
}
else {
*str_is_ip = 1;
return conn->remote_ip;
}
}
}
/*
* Optional function coming from mod_ident, used for looking up ident user
*/
static APR_OPTIONAL_FN_TYPE(ap_ident_lookup) *ident_lookup;
AP_DECLARE(const char *) ap_get_remote_logname(request_rec *r)
{
if (r->connection->remote_logname != NULL) {
return r->connection->remote_logname;
}
if (ident_lookup) {
return ident_lookup(r);
}
return NULL;
}
/* There are two options regarding what the "name" of a server is. The
* "canonical" name as defined by ServerName and Port, or the "client's
* name" as supplied by a possible Host: header or full URI. We never
* trust the port passed in the client's headers, we always use the
* port of the actual socket.
*
* The DNS option to UseCanonicalName causes this routine to do a
* reverse lookup on the local IP address of the connection and use
* that for the ServerName. This makes its value more reliable while
* at the same time allowing Demon's magic virtual hosting to work.
* The assumption is that DNS lookups are sufficiently quick...
* -- fanf 1998-10-03
*/
AP_DECLARE(const char *) ap_get_server_name(request_rec *r)
{
conn_rec *conn = r->connection;
core_dir_config *d;
d = (core_dir_config *)ap_get_module_config(r->per_dir_config,
&core_module);
if (d->use_canonical_name == USE_CANONICAL_NAME_ON) {
return r->server->server_hostname;
}
if (d->use_canonical_name == USE_CANONICAL_NAME_DNS) {
if (conn->local_host == NULL) {
if (apr_getnameinfo(&conn->local_host,
conn->local_addr, 0) != APR_SUCCESS)
conn->local_host = apr_pstrdup(conn->pool,
r->server->server_hostname);
else {
ap_str_tolower(conn->local_host);
}
}
return conn->local_host;
}
/* default */
return r->hostname ? r->hostname : r->server->server_hostname;
}
/*
* Get the current server name from the request for the purposes
* of using in a URL. If the server name is an IPv6 literal
* address, it will be returned in URL format (e.g., "[fe80::1]").
*/
static const char *get_server_name_for_url(request_rec *r)
{
const char *plain_server_name = ap_get_server_name(r);
#if APR_HAVE_IPV6
if (ap_strchr_c(plain_server_name, ':')) { /* IPv6 literal? */
return apr_psprintf(r->pool, "[%s]", plain_server_name);
}
#endif
return plain_server_name;
}
AP_DECLARE(apr_port_t) ap_get_server_port(const request_rec *r)
{
apr_port_t port;
core_dir_config *d =
(core_dir_config *)ap_get_module_config(r->per_dir_config, &core_module);
if (d->use_canonical_name == USE_CANONICAL_NAME_OFF
|| d->use_canonical_name == USE_CANONICAL_NAME_DNS) {
/* With UseCanonicalName off Apache will form self-referential
* URLs using the hostname and port supplied by the client if
* any are supplied (otherwise it will use the canonical name).
*/
port = r->parsed_uri.port_str ? r->parsed_uri.port :
r->connection->local_addr->port ? r->connection->local_addr->port :
r->server->port ? r->server->port :
ap_default_port(r);
}
else { /* d->use_canonical_name == USE_CANONICAL_NAME_ON */
/* With UseCanonicalName on (and in all versions prior to 1.3)
* Apache will use the hostname and port specified in the
* ServerName directive to construct a canonical name for the
* server. (If no port was specified in the ServerName
* directive, Apache uses the port supplied by the client if
* any is supplied, and finally the default port for the protocol
* used.
*/
port = r->server->port ? r->server->port :
r->connection->local_addr->port ? r->connection->local_addr->port :
ap_default_port(r);
}
/* default */
return port;
}
AP_DECLARE(char *) ap_construct_url(apr_pool_t *p, const char *uri,
request_rec *r)
{
unsigned port = ap_get_server_port(r);
const char *host = get_server_name_for_url(r);
if (ap_is_default_port(port, r)) {
return apr_pstrcat(p, ap_http_scheme(r), "://", host, uri, NULL);
}
return apr_psprintf(p, "%s://%s:%u%s", ap_http_scheme(r), host, port, uri);
}
AP_DECLARE(apr_off_t) ap_get_limit_req_body(const request_rec *r)
{