/* 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.
*/
/*
* protocol.c --- routines which directly communicate with the client.
*
* Code originally by Rob McCool; much redone by Robert S. Thau
* and the Apache Software Foundation.
*/
#include "apr.h"
#include "apr_strings.h"
#include "apr_buckets.h"
#include "apr_lib.h"
#include "apr_signal.h"
#include "apr_strmatch.h"
#define APR_WANT_STDIO /* for sscanf */
#define APR_WANT_STRFUNC
#define APR_WANT_MEMFUNC
#include "apr_want.h"
#include "util_filter.h"
#include "ap_config.h"
#include "httpd.h"
#include "http_config.h"
#include "http_core.h"
#include "http_protocol.h"
#include "http_main.h"
#include "http_request.h"
#include "http_vhost.h"
#include "http_log.h" /* For errors detected in basic auth common
* support code... */
#include "mod_core.h"
#include "util_charset.h"
#include "util_ebcdic.h"
#include "scoreboard.h"
#if APR_HAVE_STDARG_H
#include <stdarg.h>
#endif
#if APR_HAVE_UNISTD_H
#include <unistd.h>
#endif
/* we know core's module_index is 0 */
#undef APLOG_MODULE_INDEX
#define APLOG_MODULE_INDEX AP_CORE_MODULE_INDEX
APR_HOOK_STRUCT(
APR_HOOK_LINK(pre_read_request)
APR_HOOK_LINK(post_read_request)
APR_HOOK_LINK(log_transaction)
APR_HOOK_LINK(http_scheme)
APR_HOOK_LINK(default_port)
APR_HOOK_LINK(note_auth_failure)
APR_HOOK_LINK(protocol_propose)
APR_HOOK_LINK(protocol_switch)
APR_HOOK_LINK(protocol_get)
)
AP_DECLARE_DATA ap_filter_rec_t *ap_old_write_func = NULL;
/* Patterns to match in ap_make_content_type() */
static const char *needcset[] = {
"text/plain",
"text/html",
NULL
};
static const apr_strmatch_pattern **needcset_patterns;
static const apr_strmatch_pattern *charset_pattern;
AP_DECLARE(void) ap_setup_make_content_type(apr_pool_t *pool)
{
int i;
for (i = 0; needcset[i]; i++) {
continue;
}
needcset_patterns = (const apr_strmatch_pattern **)
apr_palloc(pool, (i + 1) * sizeof(apr_strmatch_pattern *));
for (i = 0; needcset[i]; i++) {
needcset_patterns[i] = apr_strmatch_precompile(pool, needcset[i], 0);
}
needcset_patterns[i] = NULL;
charset_pattern = apr_strmatch_precompile(pool, "charset=", 0);
}
/*
* Builds the content-type that should be sent to the client from the
* content-type specified. The following rules are followed:
* - if type is NULL or "", return NULL (do not set content-type).
* - if charset adding is disabled, stop processing and return type.
* - then, if there are no parameters on type, add the default charset
* - return type
*/
AP_DECLARE(const char *)ap_make_content_type(request_rec *r, const char *type)
{
const apr_strmatch_pattern **pcset;
core_dir_config *conf =
(core_dir_config *)ap_get_core_module_config(r->per_dir_config);
core_request_config *request_conf;
apr_size_t type_len;
if (!type || *type == '\0') {
return NULL;
}
if (conf->add_default_charset != ADD_DEFAULT_CHARSET_ON) {
return type;
}
request_conf = ap_get_core_module_config(r->request_config);
if (request_conf->suppress_charset) {
return type;
}
type_len = strlen(type);
if (apr_strmatch(charset_pattern, type, type_len) != NULL) {
/* already has parameter, do nothing */
/* XXX we don't check the validity */
;
}
else {
/* see if it makes sense to add the charset. At present,
* we only add it if the Content-type is one of needcset[]
*/
for (pcset = needcset_patterns; *pcset ; pcset++) {
if (apr_strmatch(*pcset, type, type_len) != NULL) {
struct iovec concat[3];
concat[0].iov_base = (void *)type;
concat[0].iov_len = type_len;
concat[1].iov_base = (void *)"; charset=";
concat[1].iov_len = sizeof("; charset=") - 1;
concat[2].iov_base = (void *)(conf->add_default_charset_name);
concat[2].iov_len = strlen(conf->add_default_charset_name);
type = apr_pstrcatv(r->pool, concat, 3, NULL);
break;
}
}
}
return type;
}
AP_DECLARE(void) ap_set_content_length(request_rec *r, apr_off_t clength)
{
r->clength = clength;
apr_table_setn(r->headers_out, "Content-Length",
apr_off_t_toa(r->pool, clength));
}
/*
* Return the latest rational time from a request/mtime (modification time)
* pair. We return the mtime unless it's in the future, in which case we
* return the current time. We use the request time as a reference in order
* to limit the number of calls to time(). We don't check for futurosity
* unless the mtime is at least as new as the reference.
*/
AP_DECLARE(apr_time_t) ap_rationalize_mtime(request_rec *r, apr_time_t mtime)
{
apr_time_t now;
/* For all static responses, it's almost certain that the file was
* last modified before the beginning of the request. So there's
* no reason to call time(NULL) again. But if the response has been
* created on demand, then it might be newer than the time the request
* started. In this event we really have to call time(NULL) again
* so that we can give the clients the most accurate Last-Modified. If we
* were given a time in the future, we return the current time - the
* Last-Modified can't be in the future.
*/
now = (mtime < r->request_time) ? r->request_time : apr_time_now();
return (mtime > now) ? now : mtime;
}
/* Get a line of protocol input, including any continuation lines
* caused by MIME folding (or broken clients) if fold != 0, and place it
* in the buffer s, of size n bytes, without the ending newline.
*
* Pulls from r->proto_input_filters instead of r->input_filters for
* stricter protocol adherence and better input filter behavior during
* chunked trailer processing (for http).
*
* If s is NULL, ap_rgetline_core will allocate necessary memory from r->pool.
*
* Returns APR_SUCCESS if there are no problems and sets *read to be
* the full length of s.
*
* APR_ENOSPC is returned if there is not enough buffer space.
* Other errors may be returned on other errors.
*
* The [CR]LF are *not* returned in the buffer. Therefore, a *read of 0
* indicates that an empty line was read.
*
* Notes: Because the buffer uses 1 char for NUL, the most we can return is
* (n - 1) actual characters.
*
* If no LF is detected on the last line due to a dropped connection
* or a full buffer, that's considered an error.
*/
AP_DECLARE(apr_status_t) ap_rgetline_core(char **s, apr_size_t n,
apr_size_t *read, request_rec *r,
int flags, apr_bucket_brigade *bb)
{
apr_status_t rv;
apr_bucket *e;
apr_size_t bytes_handled = 0, current_alloc = 0;
char *pos, *last_char = *s;
int do_alloc = (*s == NULL), saw_eos = 0;
int fold = flags & AP_GETLINE_FOLD;
int crlf = flags & AP_GETLINE_CRLF;
int nospc_eol = flags & AP_GETLINE_NOSPC_EOL;
int saw_eol = 0, saw_nospc = 0;
if (!n) {
/* Needs room for NUL byte at least */
*read = 0;
return APR_BADARG;
}
/*
* Initialize last_char as otherwise a random value will be compared
* against APR_ASCII_LF at the end of the loop if bb only contains
* zero-length buckets.
*/
if (last_char)
*last_char = '\0';
do {
apr_brigade_cleanup(bb);
rv = ap_get_brigade(r->proto_input_filters, bb, AP_MODE_GETLINE,
APR_BLOCK_READ, 0);
if (rv != APR_SUCCESS) {
goto cleanup;
}
/* Something horribly wrong happened. Someone didn't block!
* (this also happens at the end of each keepalive connection)
*/
if (APR_BRIGADE_EMPTY(bb)) {
rv = APR_EGENERAL;
goto cleanup;
}
for (e = APR_BRIGADE_FIRST(bb);
e != APR_BRIGADE_SENTINEL(bb);
e = APR_BUCKET_NEXT(e))
{
const char *str;
apr_size_t len;
/* If we see an EOS, don't bother doing anything more. */
if (APR_BUCKET_IS_EOS(e)) {
saw_eos = 1;
break;
}
rv = apr_bucket_read(e, &str, &len, APR_BLOCK_READ);
if (rv != APR_SUCCESS) {
goto cleanup;
}
if (len == 0) {
/* no use attempting a zero-byte alloc (hurts when
* using --with-efence --enable-pool-debug) or
* doing any of the other logic either
*/
continue;
}
/* Would this overrun our buffer? If so, we'll die. */
if (n < bytes_handled + len) {
/* Before we die, let's fill the buffer up to its limit (i.e.
* fall through with the remaining length, if any), setting
* saw_eol on LF to stop the outer loop appropriately; we may
* come back here once the buffer is filled (no LF seen), and
* either be done at that time or continue to wait for LF here
* if nospc_eol is set.
*
* But there is also a corner cases which we want to address,
* namely if the buffer is overrun by the final LF only (i.e.
* the CR fits in); this is not really an overrun since we'll
* strip the CR finally (and use it for NUL byte), but anyway
* we have to handle the case so that it's not returned to the
* caller as part of the truncated line (it's not!). This is
* easier to consider that LF is out of counting and thus fall
* through with no error (saw_eol is set to 2 so that we later
* ignore LF handling already done here), while folding and
* nospc_eol logics continue to work (or fail) appropriately.
*/
saw_eol = (str[len - 1] == APR_ASCII_LF);
if (/* First time around */
saw_eol && !saw_nospc
/* Single LF completing the buffered CR, */
&& ((len == 1 && ((*s)[bytes_handled - 1] == APR_ASCII_CR))
/* or trailing CRLF overuns by LF only */
|| (len > 1 && str[len - 2] == APR_ASCII_CR
&& n - bytes_handled + 1 == len))) {
/* In both cases *last_char is (to be) the CR stripped by
* later 'bytes_handled = last_char - *s'.
*/
saw_eol = 2;
}
else {
/* In any other case we'd lose data. */
rv = APR_ENOSPC;
saw_nospc = 1;
}
len = n - bytes_handled;
if (!len) {
if (saw_eol) {
break;
}
if (nospc_eol) {
continue;
}
goto cleanup;
}
}
/* Do we have to handle the allocation ourselves? */
if (do_alloc) {
/* We'll assume the common case where one bucket is enough. */
if (!*s) {
current_alloc = len;
*s = apr_palloc(r->pool, current_alloc + 1);
}
else if (bytes_handled + len > current_alloc) {
/* Increase the buffer size */
apr_size_t new_size = current_alloc * 2;
char *new_buffer;
if (bytes_handled + len > new_size) {
new_size = (bytes_handled + len) * 2;
}
new_buffer = apr_palloc(r->pool, new_size + 1);
/* Copy what we already had. */
memcpy(new_buffer, *s, bytes_handled);
current_alloc = new_size;
*s = new_buffer;
}
}
/* Just copy the rest of the data to the end of the old buffer. */
pos = *s + bytes_handled;
memcpy(pos, str, len);
last_char = pos + len - 1;
/* We've now processed that new data - update accordingly. */
bytes_handled += len;
}
/* If we got a full line of input, stop reading */
if (last_char && (*last_char == APR_ASCII_LF)) {
saw_eol = 1;
}
} while (!saw_eol);
if (rv != APR_SUCCESS) {
/* End of line after APR_ENOSPC above */
goto cleanup;
}
/* Now terminate the string at the end of the line;
* if the last-but-one character is a CR, terminate there.
* LF is handled above (not accounted) when saw_eol == 2,
* the last char is CR to terminate at still.
*/
if (saw_eol < 2) {
if (last_char > *s && last_char[-1] == APR_ASCII_CR) {
last_char--;
}
else if (crlf) {
rv = APR_EINVAL;
goto cleanup;
}
}
bytes_handled = last_char - *s;
/* If we're folding, we have more work to do.
*
* Note that if an EOS was seen, we know we can't have another line.
*/
if (fold && bytes_handled && !saw_eos) {
for (;;) {
const char *str;
apr_size_t len;
char c;
/* Clear the temp brigade for this filter read. */
apr_brigade_cleanup(bb);
/* We only care about the first byte. */
rv = ap_get_brigade(r->proto_input_filters, bb, AP_MODE_SPECULATIVE,
APR_BLOCK_READ, 1);
if (rv != APR_SUCCESS) {
goto cleanup;
}
if (APR_BRIGADE_EMPTY(bb)) {
break;
}
e = APR_BRIGADE_FIRST(bb);
/* If we see an EOS, don't bother doing anything more. */
if (APR_BUCKET_IS_EOS(e)) {
break;
}
rv = apr_bucket_read(e, &str, &len, APR_BLOCK_READ);
if (rv != APR_SUCCESS) {
apr_brigade_cleanup(bb);
goto cleanup;
}
/* Found one, so call ourselves again to get the next line.
*
* FIXME: If the folding line is completely blank, should we
* stop folding? Does that require also looking at the next
* char?
*/
/* When we call destroy, the buckets are deleted, so save that
* one character we need. This simplifies our execution paths
* at the cost of one character read.
*/
c = *str;
if (c == APR_ASCII_BLANK || c == APR_ASCII_TAB) {
/* Do we have enough space? We may be full now. */
if (bytes_handled >= n) {
rv = APR_ENOSPC;
goto cleanup;
}
else {
apr_size_t next_size, next_len;
char *tmp;
/* If we're doing the allocations for them, we have to
* give ourselves a NULL and copy it on return.
*/
if (do_alloc) {
tmp = NULL;
}
else {
tmp = last_char;
}
next_size = n - bytes_handled;
rv = ap_rgetline_core(&tmp, next_size, &next_len, r,
flags & ~AP_GETLINE_FOLD, bb);
if (rv != APR_SUCCESS) {
goto cleanup;
}
if (do_alloc && next_len > 0) {
char *new_buffer;
apr_size_t new_size = bytes_handled + next_len + 1;
/* we need to alloc an extra byte for a null */
new_buffer = apr_palloc(r->pool, new_size);
/* Copy what we already had. */
memcpy(new_buffer, *s, bytes_handled);
/* copy the new line, including the trailing null */
memcpy(new_buffer + bytes_handled, tmp, next_len);
*s = new_buffer;
}
last_char += next_len;
bytes_handled += next_len;
}
}
else { /* next character is not tab or space */
break;
}
}
}
cleanup:
if (bytes_handled >= n) {
bytes_handled = n - 1;
}
*read = bytes_handled;
if (*s) {
/* ensure the string is NUL terminated */
(*s)[*read] = '\0';
/* PR#43039: We shouldn't accept NULL bytes within the line */
bytes_handled = strlen(*s);
if (bytes_handled < *read) {
ap_log_data(APLOG_MARK, APLOG_DEBUG, ap_server_conf,
"NULL bytes in header", *s, *read, 0);
*read = bytes_handled;
if (rv == APR_SUCCESS) {
rv = APR_EINVAL;
}
}
}
return rv;
}
#if APR_CHARSET_EBCDIC
AP_DECLARE(apr_status_t) ap_rgetline(char **s, apr_size_t n,
apr_size_t *read, request_rec *r,
int fold, apr_bucket_brigade *bb)
{
/* on ASCII boxes, ap_rgetline is a macro which simply invokes
* ap_rgetline_core with the same parms
*
* on EBCDIC boxes, each complete http protocol input line needs to be
* translated into the code page used by the compiler. Since
* ap_rgetline_core uses recursion, we do the translation in a wrapper
* function to ensure that each input character gets translated only once.
*/
apr_status_t rv;
rv = ap_rgetline_core(s, n, read, r, fold, bb);
if (rv == APR_SUCCESS || APR_STATUS_IS_ENOSPC(rv)) {
ap_xlate_proto_from_ascii(*s, *read);
}
return rv;
}
#endif
AP_DECLARE(int) ap_getline(char *s, int n, request_rec *r, int flags)
{
char *tmp_s = s;
apr_status_t rv;
apr_size_t len;
apr_bucket_brigade *tmp_bb;
if (n < 1) {
/* Can't work since we always NUL terminate */
return -1;
}
tmp_bb = apr_brigade_create(r->pool, r->connection->bucket_alloc);
rv = ap_rgetline(&tmp_s, n, &len, r, flags, tmp_bb);
apr_brigade_destroy(tmp_bb);
/* Map the out-of-space condition to the old API. */
if (rv == APR_ENOSPC) {
return n;
}
/* Anything else is just bad. */
if (rv != APR_SUCCESS) {
return -1;
}
return (int)len;
}
/* parse_uri: break apart the uri
* Side Effects:
* - sets r->args to rest after '?' (or NULL if no '?')
* - sets r->uri to request uri (without r->args part)
* - sets r->hostname (if not set already) from request (scheme://host:port)
*/
AP_CORE_DECLARE(void) ap_parse_uri(request_rec *r, const char *uri)
{
int status = HTTP_OK;
r->unparsed_uri = apr_pstrdup(r->pool, uri);
/* http://issues.apache.org/bugzilla/show_bug.cgi?id=31875
* http://issues.apache.org/bugzilla/show_bug.cgi?id=28450
*
* This is not in fact a URI, it's a path. That matters in the
* case of a leading double-slash. We need to resolve the issue
* by normalizing that out before treating it as a URI.
*/
while ((uri[0] == '/') && (uri[1] == '/')) {
++uri ;
}
if (r->method_number == M_CONNECT) {
status = apr_uri_parse_hostinfo(r->pool, uri, &r->parsed_uri);
}
else {
status = apr_uri_parse(r->pool, uri, &r->parsed_uri);
}
if (status == APR_SUCCESS) {
/* if it has a scheme we may need to do absoluteURI vhost stuff */
if (r->parsed_uri.scheme
&& !ap_cstr_casecmp(r->parsed_uri.scheme, ap_http_scheme(r))) {
r->hostname = r->parsed_uri.hostname;
}
else if (r->method_number == M_CONNECT) {
r->hostname = r->parsed_uri.hostname;
}
r->args = r->parsed_uri.query;
if (r->parsed_uri.path) {
r->uri = r->parsed_uri.path;
}
else if (r->method_number == M_OPTIONS) {
r->uri = apr_pstrdup(r->pool, "*");
}
else {
r->uri = apr_pstrdup(r->pool, "/");
}
#if defined(OS2) || defined(WIN32)
/* Handle path translations for OS/2 and plug security hole.
* This will prevent "http://www.wherever.com/..\..\/" from
* returning a directory for the root drive.
*/
{
char *x;
for (x = r->uri; (x = strchr(x, '\\')) != NULL; )
*x = '/';
}
#endif /* OS2 || WIN32 */
}
else {
r->args = NULL;
r->hostname = NULL;
r->status = HTTP_BAD_REQUEST; /* set error status */
r->uri = apr_pstrdup(r->pool, uri);
}
}
/* get the length of the field name for logging, but no more than 80 bytes */
#define LOG_NAME_MAX_LEN 80
static int field_name_len(const char *field)
{
const char *end = ap_strchr_c(field, ':');
if (end == NULL || end - field > LOG_NAME_MAX_LEN)
return LOG_NAME_MAX_LEN;
return end - field;
}
static int read_request_line(request_rec *r, apr_bucket_brigade *bb)
{
apr_size_t len;
int num_blank_lines = DEFAULT_LIMIT_BLANK_LINES;
core_server_config *conf = ap_get_core_module_config(r->server->module_config);
int strict = (conf->http_conformance != AP_HTTP_CONFORMANCE_UNSAFE);
/* Read past empty lines until we get a real request line,
* a read error, the connection closes (EOF), or we timeout.
*
* We skip empty lines because browsers have to tack a CRLF on to the end
* of POSTs to support old CERN webservers. But note that we may not
* have flushed any previous response completely to the client yet.
* We delay the flush as long as possible so that we can improve
* performance for clients that are pipelining requests. If a request
* is pipelined then we won't block during the (implicit) read() below.
* If the requests aren't pipelined, then the client is still waiting
* for the final buffer flush from us, and we will block in the implicit
* read(). B_SAFEREAD ensures that the BUFF layer flushes if it will
* have to block during a read.
*/
do {
apr_status_t rv;
/* ensure ap_rgetline allocates memory each time thru the loop
* if there are empty lines
*/
r->the_request = NULL;
rv = ap_rgetline(&(r->the_request), (apr_size_t)(r->server->limit_req_line + 2),
&len, r, strict ? AP_GETLINE_CRLF : 0, bb);
if (rv != APR_SUCCESS) {
r->request_time = apr_time_now();
/* ap_rgetline returns APR_ENOSPC if it fills up the
* buffer before finding the end-of-line. This is only going to
* happen if it exceeds the configured limit for a request-line.
*/
if (APR_STATUS_IS_ENOSPC(rv)) {
r->status = HTTP_REQUEST_URI_TOO_LARGE;
}
else if (APR_STATUS_IS_TIMEUP(rv)) {
r->status = HTTP_REQUEST_TIME_OUT;
}
else if (APR_STATUS_IS_EINVAL(rv)) {
r->status = HTTP_BAD_REQUEST;
}
r->proto_num = HTTP_VERSION(1,0);
r->protocol = apr_pstrdup(r->pool, "HTTP/1.0");
return 0;
}
} while ((len <= 0) && (--num_blank_lines >= 0));
/* Set r->request_time before any logging, mod_unique_id needs it. */
r->request_time = apr_time_now();
if (APLOGrtrace5(r)) {
ap_log_rerror(APLOG_MARK, APLOG_TRACE5, 0, r,
"Request received from client: %s",
ap_escape_logitem(r->pool, r->the_request));
}
return 1;
}
AP_DECLARE(int) ap_parse_request_line(request_rec *r)
{
core_server_config *conf = ap_get_core_module_config(r->server->module_config);
int strict = (conf->http_conformance != AP_HTTP_CONFORMANCE_UNSAFE);
enum {
rrl_none, rrl_badmethod, rrl_badwhitespace, rrl_excesswhitespace,
rrl_missinguri, rrl_baduri, rrl_badprotocol, rrl_trailingtext,
rrl_badmethod09, rrl_reject09
} deferred_error = rrl_none;
apr_size_t len = 0;
char *uri, *ll;
r->method = r->the_request;
/* If there is whitespace before a method, skip it and mark in error */
if (apr_isspace(*r->method)) {
deferred_error = rrl_badwhitespace;
for ( ; apr_isspace(*r->method); ++r->method)
;
}
/* Scan the method up to the next whitespace, ensure it contains only
* valid http-token characters, otherwise mark in error
*/
if (strict) {
ll = (char*) ap_scan_http_token(r->method);
}
else {
ll = (char*) ap_scan_vchar_obstext(r->method);
}
if (((ll == r->method) || (*ll && !apr_isspace(*ll)))
&& deferred_error == rrl_none) {
deferred_error = rrl_badmethod;
ll = strpbrk(ll, "\t\n\v\f\r ");
}
/* Verify method terminated with a single SP, or mark as specific error */
if (!ll) {
if (deferred_error == rrl_none)
deferred_error = rrl_missinguri;
r->protocol = uri = "";
goto rrl_done;
}
else if (strict && ll[0] && apr_isspace(ll[1])
&& deferred_error == rrl_none) {
deferred_error = rrl_excesswhitespace;
}
/* Advance uri pointer over leading whitespace, NUL terminate the method
* If non-SP whitespace is encountered, mark as specific error
*/
for (uri = ll; apr_isspace(*uri); ++uri)
if (*uri != ' ' && deferred_error == rrl_none)
deferred_error = rrl_badwhitespace;
*ll = '\0';
if (!*uri && deferred_error == rrl_none)
deferred_error = rrl_missinguri;
/* Scan the URI up to the next whitespace, ensure it contains no raw
* control characters, otherwise mark in error
*/
ll = (char*) ap_scan_vchar_obstext(uri);
if (ll == uri || (*ll && !apr_isspace(*ll))) {
deferred_error = rrl_baduri;
ll = strpbrk(ll, "\t\n\v\f\r ");
}
/* Verify URI terminated with a single SP, or mark as specific error */
if (!ll) {
r->protocol = "";
goto rrl_done;
}
else if (strict && ll[0] && apr_isspace(ll[1])
&& deferred_error == rrl_none) {
deferred_error = rrl_excesswhitespace;
}
/* Advance protocol pointer over leading whitespace, NUL terminate the uri
* If non-SP whitespace is encountered, mark as specific error
*/
for (r->protocol = ll; apr_isspace(*r->protocol); ++r->protocol)
if (*r->protocol != ' ' && deferred_error == rrl_none)
deferred_error = rrl_badwhitespace;
*ll = '\0';
/* Scan the protocol up to the next whitespace, validation comes later */
if (!(ll = (char*) ap_scan_vchar_obstext(r->protocol))) {
len = strlen(r->protocol);
goto rrl_done;
}
len = ll - r->protocol;
/* Advance over trailing whitespace, if found mark in error,
* determine if trailing text is found, unconditionally mark in error,
* finally NUL terminate the protocol string
*/
if (*ll && !apr_isspace(*ll)) {
deferred_error = rrl_badprotocol;
}
else if (strict && *ll) {
deferred_error = rrl_excesswhitespace;
}
else {
for ( ; apr_isspace(*ll); ++ll)
if (*ll != ' ' && deferred_error == rrl_none)
deferred_error = rrl_badwhitespace;
if (*ll && deferred_error == rrl_none)
deferred_error = rrl_trailingtext;
}
*((char *)r->protocol + len) = '\0';
rrl_done:
/* For internal integrity and palloc efficiency, reconstruct the_request
* in one palloc, using only single SP characters, per spec.
*/
r->the_request = apr_pstrcat(r->pool, r->method, *uri ? " " : NULL, uri,
*r->protocol ? " " : NULL, r->protocol, NULL);
if (len == 8
&& r->protocol[0] == 'H' && r->protocol[1] == 'T'
&& r->protocol[2] == 'T' && r->protocol[3] == 'P'
&& r->protocol[4] == '/' && apr_isdigit(r->protocol[5])
&& r->protocol[6] == '.' && apr_isdigit(r->protocol[7])
&& r->protocol[5] != '0') {
r->assbackwards = 0;
r->proto_num = HTTP_VERSION(r->protocol[5] - '0', r->protocol[7] - '0');
}
else if (len == 8
&& (r->protocol[0] == 'H' || r->protocol[0] == 'h')
&& (r->protocol[1] == 'T' || r->protocol[1] == 't')
&& (r->protocol[2] == 'T' || r->protocol[2] == 't')
&& (r->protocol[3] == 'P' || r->protocol[3] == 'p')
&& r->protocol[4] == '/' && apr_isdigit(r->protocol[5])
&& r->protocol[6] == '.' && apr_isdigit(r->protocol[7])
&& r->protocol[5] != '0') {
r->assbackwards = 0;
r->proto_num = HTTP_VERSION(r->protocol[5] - '0', r->protocol[7] - '0');
if (strict && deferred_error == rrl_none)
deferred_error = rrl_badprotocol;
else
memcpy((char*)r->protocol, "HTTP", 4);
}
else if (r->protocol[0]) {
r->proto_num = HTTP_VERSION(0, 9);
/* Defer setting the r->protocol string till error msg is composed */
if (deferred_error == rrl_none)
deferred_error = rrl_badprotocol;
}
else {
r->assbackwards = 1;
r->protocol = apr_pstrdup(r->pool, "HTTP/0.9");
r->proto_num = HTTP_VERSION(0, 9);
}
/* Determine the method_number and parse the uri prior to invoking error
* handling, such that these fields are available for substitution
*/
r->method_number = ap_method_number_of(r->method);
if (r->method_number == M_GET && r->method[0] == 'H')
r->header_only = 1;
ap_parse_uri(r, uri);
if (r->status == HTTP_OK
&& (r->parsed_uri.path != NULL)
&& (r->parsed_uri.path[0] != '/')
&& (r->method_number != M_OPTIONS
|| strcmp(r->parsed_uri.path, "*") != 0)) {
/* Invalid request-target per RFC 7230 section 5.3 */
r->status = HTTP_BAD_REQUEST;
}
/* With the request understood, we can consider HTTP/0.9 specific errors */
if (r->proto_num == HTTP_VERSION(0, 9) && deferred_error == rrl_none) {
if (conf->http09_enable == AP_HTTP09_DISABLE)
deferred_error = rrl_reject09;
else if (strict && (r->method_number != M_GET || r->header_only))
deferred_error = rrl_badmethod09;
}
/* Now that the method, uri and protocol are all processed,
* we can safely resume any deferred error reporting
*/
if (deferred_error != rrl_none) {
if (deferred_error == rrl_badmethod)
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(03445)
"HTTP Request Line; Invalid method token: '%.*s'",
field_name_len(r->method), r->method);
else if (deferred_error == rrl_badmethod09)
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(03444)
"HTTP Request Line; Invalid method token: '%.*s'"
" (only GET is allowed for HTTP/0.9 requests)",
field_name_len(r->method), r->method);
else if (deferred_error == rrl_missinguri)
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(03446)
"HTTP Request Line; Missing URI");
else if (deferred_error == rrl_baduri)
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(03454)
"HTTP Request Line; URI incorrectly encoded: '%.*s'",
field_name_len(r->unparsed_uri), r->unparsed_uri);
else if (deferred_error == rrl_badwhitespace)
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(03447)
"HTTP Request Line; Invalid whitespace");
else if (deferred_error == rrl_excesswhitespace)
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(03448)
"HTTP Request Line; Excess whitespace "
"(disallowed by HttpProtocolOptions Strict)");
else if (deferred_error == rrl_trailingtext)
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(03449)
"HTTP Request Line; Extraneous text found '%.*s' "
"(perhaps whitespace was injected?)",
field_name_len(ll), ll);
else if (deferred_error == rrl_reject09)
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(02401)
"HTTP Request Line; Rejected HTTP/0.9 request");
else if (deferred_error == rrl_badprotocol)
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(02418)
"HTTP Request Line; Unrecognized protocol '%.*s' "
"(perhaps whitespace was injected?)",
field_name_len(r->protocol), r->protocol);
r->status = HTTP_BAD_REQUEST;
goto rrl_failed;
}
if (conf->http_methods == AP_HTTP_METHODS_REGISTERED
&& r->method_number == M_INVALID) {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(02423)
"HTTP Request Line; Unrecognized HTTP method: '%.*s' "
"(disallowed by RegisteredMethods)",
field_name_len(r->method), r->method);
r->status = HTTP_NOT_IMPLEMENTED;
/* This can't happen in an HTTP/0.9 request, we verified GET above */
return 0;
}
if (r->status != HTTP_OK) {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(03450)
"HTTP Request Line; Unable to parse URI: '%.*s'",
field_name_len(r->uri), r->uri);
goto rrl_failed;
}
if (strict) {
if (r->parsed_uri.fragment) {
/* RFC3986 3.5: no fragment */
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(02421)
"HTTP Request Line; URI must not contain a fragment");
r->status = HTTP_BAD_REQUEST;
goto rrl_failed;
}
if (r->parsed_uri.user || r->parsed_uri.password) {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(02422)
"HTTP Request Line; URI must not contain a "
"username/password");
r->status = HTTP_BAD_REQUEST;
goto rrl_failed;
}
}
return 1;
rrl_failed:
if (r->proto_num == HTTP_VERSION(0, 9)) {
/* Send all parsing and protocol error response with 1.x behavior,
* and reserve 505 errors for actual HTTP protocols presented.
* As called out in RFC7230 3.5, any errors parsing the protocol
* from the request line are nearly always misencoded HTTP/1.x
* requests. Only a valid 0.9 request with no parsing errors
* at all may be treated as a simple request, if allowed.
*/
r->assbackwards = 0;
r->connection->keepalive = AP_CONN_CLOSE;
r->proto_num = HTTP_VERSION(1, 0);
r->protocol = apr_pstrdup(r->pool, "HTTP/1.0");
}
return 0;
}
AP_DECLARE(int) ap_check_request_header(request_rec *r)
{
core_server_config *conf;
int strict_host_check;
const char *expect;
int access_status;
conf = ap_get_core_module_config(r->server->module_config);
/* update what we think the virtual host is based on the headers we've
* now read. may update status.
*/
strict_host_check = (conf->strict_host_check == AP_CORE_CONFIG_ON);
access_status = ap_update_vhost_from_headers_ex(r, strict_host_check);
if (strict_host_check && access_status != HTTP_OK) {
if (r->server == ap_server_conf) {
ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(10156)
"Requested hostname '%s' did not match any ServerName/ServerAlias "
"in the global server configuration ", r->hostname);
}
else {
ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(10157)
"Requested hostname '%s' did not match any ServerName/ServerAlias "
"in the matching virtual host (default vhost for "
"current connection is %s:%u)",
r->hostname, r->server->defn_name, r->server->defn_line_number);
}
r->status = access_status;
}
if (r->status != HTTP_OK) {
return 0;
}
if ((!r->hostname && (r->proto_num >= HTTP_VERSION(1, 1)))
|| ((r->proto_num == HTTP_VERSION(1, 1))
&& !apr_table_get(r->headers_in, "Host"))) {
/*
* Client sent us an HTTP/1.1 or later request without telling us the
* hostname, either with a full URL or a Host: header. We therefore
* need to (as per the 1.1 spec) send an error. As a special case,
* HTTP/1.1 mentions twice (S9, S14.23) that a request MUST contain
* a Host: header, and the server MUST respond with 400 if it doesn't.
*/
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(00569)
"client sent HTTP/1.1 request without hostname "
"(see RFC2616 section 14.23): %s", r->uri);
r->status = HTTP_BAD_REQUEST;
return 0;
}
if (((expect = apr_table_get(r->headers_in, "Expect")) != NULL)
&& (expect[0] != '\0')) {
/*
* The Expect header field was added to HTTP/1.1 after RFC 2068
* as a means to signal when a 100 response is desired and,
* unfortunately, to signal a poor man's mandatory extension that
* the server must understand or return 417 Expectation Failed.
*/
if (ap_cstr_casecmp(expect, "100-continue") == 0) {
r->expecting_100 = 1;
}
else {
ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(00570)
"client sent an unrecognized expectation value "
"of Expect: %s", expect);
r->status = HTTP_EXPECTATION_FAILED;
return 0;
}
}
return 1;
}
static int table_do_fn_check_lengths(void *r_, const char *key,
const char *value)
{
request_rec *r = r_;
if (value == NULL || r->server->limit_req_fieldsize >= strlen(value) )
return 1;
r->status = HTTP_BAD_REQUEST;
apr_table_setn(r->notes, "error-notes",
"Size of a request header field exceeds server limit.");
ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(00560) "Request "
"header exceeds LimitRequestFieldSize after merging: %.*s",
field_name_len(key), key);
return 0;
}
AP_DECLARE(void) ap_get_mime_headers_core(request_rec *r, apr_bucket_brigade *bb)
{
char *last_field = NULL;
apr_size_t last_len = 0;
apr_size_t alloc_len = 0;
char *field;
char *value;
apr_size_t len;
int fields_read = 0;
char *tmp_field;
core_server_config *conf = ap_get_core_module_config(r->server->module_config);
int strict = (conf->http_conformance != AP_HTTP_CONFORMANCE_UNSAFE);
/*
* Read header lines until we get the empty separator line, a read error,
* the connection closes (EOF), reach the server limit, or we timeout.
*/
while(1) {
apr_status_t rv;
field = NULL;
rv = ap_rgetline(&field, r->server->limit_req_fieldsize + 2,
&len, r, strict ? AP_GETLINE_CRLF : 0, bb);
if (rv != APR_SUCCESS) {
if (APR_STATUS_IS_TIMEUP(rv)) {
r->status = HTTP_REQUEST_TIME_OUT;
}
else {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, rv, r,
"Failed to read request header line %s", field);
r->status = HTTP_BAD_REQUEST;
}
/* ap_rgetline returns APR_ENOSPC if it fills up the buffer before
* finding the end-of-line. This is only going to happen if it
* exceeds the configured limit for a field size.
*/
if (rv == APR_ENOSPC) {
apr_table_setn(r->notes, "error-notes",
"Size of a request header field "
"exceeds server limit.");
ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(00561)
"Request header exceeds LimitRequestFieldSize%s"
"%.*s",
(field && *field) ? ": " : "",
(field) ? field_name_len(field) : 0,
(field) ? field : "");
}
return;
}
/* For all header values, and all obs-fold lines, the presence of
* additional whitespace is a no-op, so collapse trailing whitespace
* to save buffer allocation and optimize copy operations.
* Do not remove the last single whitespace under any condition.
*/
while (len > 1 && (field[len-1] == '\t' || field[len-1] == ' ')) {
field[--len] = '\0';
}
if (*field == '\t' || *field == ' ') {
/* Append any newly-read obs-fold line onto the preceding
* last_field line we are processing
*/
apr_size_t fold_len;
if (last_field == NULL) {
r->status = HTTP_BAD_REQUEST;
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(03442)
"Line folding encountered before first"
" header line");
return;
}
if (field[1] == '\0') {
r->status = HTTP_BAD_REQUEST;
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(03443)
"Empty folded line encountered");
return;
}
/* Leading whitespace on an obs-fold line can be
* similarly discarded */
while (field[1] == '\t' || field[1] == ' ') {
++field; --len;
}
/* This line is a continuation of the preceding line(s),
* so append it to the line that we've set aside.
* Note: this uses a power-of-two allocator to avoid
* doing O(n) allocs and using O(n^2) space for
* continuations that span many many lines.
*/
fold_len = last_len + len + 1; /* trailing null */
if (fold_len >= (apr_size_t)(r->server->limit_req_fieldsize)) {
r->status = HTTP_BAD_REQUEST;
/* report what we have accumulated so far before the
* overflow (last_field) as the field with the problem
*/
apr_table_setn(r->notes, "error-notes",
"Size of a request header field "
"exceeds server limit.");
ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(00562)
"Request header exceeds LimitRequestFieldSize "
"after folding: %.*s",
field_name_len(last_field), last_field);
return;
}
if (fold_len > alloc_len) {
char *fold_buf;
alloc_len += alloc_len;
if (fold_len > alloc_len) {
alloc_len = fold_len;
}
fold_buf = (char *)apr_palloc(r->pool, alloc_len);
memcpy(fold_buf, last_field, last_len);
last_field = fold_buf;
}
memcpy(last_field + last_len, field, len +1); /* +1 for nul */
/* Replace obs-fold w/ SP per RFC 7230 3.2.4 */
last_field[last_len] = ' ';
last_len += len;
/* We've appended this obs-fold line to last_len, proceed to
* read the next input line
*/
continue;
}
else if (last_field != NULL) {
/* Process the previous last_field header line with all obs-folded
* segments already concatenated (this is not operating on the
* most recently read input line).
*/
if (r->server->limit_req_fields
&& (++fields_read > r->server->limit_req_fields)) {
r->status = HTTP_BAD_REQUEST;
apr_table_setn(r->notes, "error-notes",
"The number of request header fields "
"exceeds this server's limit.");
ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(00563)
"Number of request headers exceeds "
"LimitRequestFields");
return;
}
if (!strict)
{
/* Not Strict ('Unsafe' mode), using the legacy parser */
if (!(value = strchr(last_field, ':'))) { /* Find ':' or */
r->status = HTTP_BAD_REQUEST; /* abort bad request */
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(00564)
"Request header field is missing ':' "
"separator: %.*s", (int)LOG_NAME_MAX_LEN,
last_field);
return;
}
if (value == last_field) {
r->status = HTTP_BAD_REQUEST;
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(03453)
"Request header field name was empty");
return;
}
*value++ = '\0'; /* NUL-terminate at colon */
if (strpbrk(last_field, "\t\n\v\f\r ")) {
r->status = HTTP_BAD_REQUEST;
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(03452)
"Request header field name presented"
" invalid whitespace");
return;
}
while (*value == ' ' || *value == '\t') {
++value; /* Skip to start of value */
}
if (strpbrk(value, "\n\v\f\r")) {
r->status = HTTP_BAD_REQUEST;
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(03451)
"Request header field value presented"
" bad whitespace");
return;
}
}
else /* Using strict RFC7230 parsing */
{
/* Ensure valid token chars before ':' per RFC 7230 3.2.4 */
value = (char *)ap_scan_http_token(last_field);
if ((value == last_field) || *value != ':') {
r->status = HTTP_BAD_REQUEST;
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(02426)
"Request header field name is malformed: "
"%.*s", (int)LOG_NAME_MAX_LEN, last_field);
return;
}
*value++ = '\0'; /* NUL-terminate last_field name at ':' */
while (*value == ' ' || *value == '\t') {
++value; /* Skip LWS of value */
}
/* Find invalid, non-HT ctrl char, or the trailing NULL */
tmp_field = (char *)ap_scan_http_field_content(value);
/* Reject value for all garbage input (CTRLs excluding HT)
* e.g. only VCHAR / SP / HT / obs-text are allowed per
* RFC7230 3.2.6 - leave all more explicit rule enforcement
* for specific header handler logic later in the cycle
*/
if (*tmp_field != '\0') {
r->status = HTTP_BAD_REQUEST;
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(02427)
"Request header value is malformed: "
"%.*s", (int)LOG_NAME_MAX_LEN, value);
return;
}
}
apr_table_addn(r->headers_in, last_field, value);
/* This last_field header is now stored in headers_in,
* resume processing of the current input line.
*/
}
/* Found the terminating empty end-of-headers line, stop. */
if (len == 0) {
break;
}
/* Keep track of this new header line so that we can extend it across
* any obs-fold or parse it on the next loop iteration. We referenced
* our previously allocated buffer in r->headers_in,
* so allocate a fresh buffer if required.
*/
alloc_len = 0;
last_field = field;
last_len = len;
}
/* Combine multiple message-header fields with the same
* field-name, following RFC 2616, 4.2.
*/
apr_table_compress(r->headers_in, APR_OVERLAP_TABLES_MERGE);
/* enforce LimitRequestFieldSize for merged headers */
apr_table_do(table_do_fn_check_lengths, r, r->headers_in, NULL);
}
AP_DECLARE(void) ap_get_mime_headers(request_rec *r)
{
apr_bucket_brigade *tmp_bb;
tmp_bb = apr_brigade_create(r->pool, r->connection->bucket_alloc);
ap_get_mime_headers_core(r, tmp_bb);
apr_brigade_destroy(tmp_bb);
}
AP_DECLARE(request_rec *) ap_create_request(conn_rec *conn)
{
request_rec *r;
apr_pool_t *p;
apr_pool_create(&p, conn->pool);
apr_pool_tag(p, "request");
r = apr_pcalloc(p, sizeof(request_rec));
AP_READ_REQUEST_ENTRY((intptr_t)r, (uintptr_t)conn);
r->pool = p;
r->connection = conn;
r->server = conn->base_server;
r->user = NULL;
r->ap_auth_type = NULL;
r->allowed_methods = ap_make_method_list(p, 2);
r->headers_in = apr_table_make(r->pool, 25);
r->trailers_in = apr_table_make(r->pool, 5);
r->subprocess_env = apr_table_make(r->pool, 25);
r->headers_out = apr_table_make(r->pool, 12);
r->err_headers_out = apr_table_make(r->pool, 5);
r->trailers_out = apr_table_make(r->pool, 5);
r->notes = apr_table_make(r->pool, 5);
r->request_config = ap_create_request_config(r->pool);
/* Must be set before we run create request hook */
r->proto_output_filters = conn->output_filters;
r->output_filters = r->proto_output_filters;
r->proto_input_filters = conn->input_filters;
r->input_filters = r->proto_input_filters;
ap_run_create_request(r);
r->per_dir_config = r->server->lookup_defaults;
r->sent_bodyct = 0; /* bytect isn't for body */
r->read_length = 0;
r->read_body = REQUEST_NO_BODY;
r->status = HTTP_OK; /* Until further notice */
r->header_only = 0;
r->the_request = NULL;
/* Begin by presuming any module can make its own path_info assumptions,
* until some module interjects and changes the value.
*/
r->used_path_info = AP_REQ_DEFAULT_PATH_INFO;
r->useragent_addr = conn->client_addr;
r->useragent_ip = conn->client_ip;
return r;
}
/* Apply the server's timeout/config to the connection/request. */
static void apply_server_config(request_rec *r)
{
apr_socket_t *csd;
csd = ap_get_conn_socket(r->connection);
apr_socket_timeout_set(csd, r->server->timeout);
r->per_dir_config = r->server->lookup_defaults;
}
request_rec *ap_read_request(conn_rec *conn)
{
int access_status;
apr_bucket_brigade *tmp_bb;
request_rec *r = ap_create_request(conn);
tmp_bb = apr_brigade_create(r->pool, r->connection->bucket_alloc);
conn->keepalive = AP_CONN_UNKNOWN;
ap_run_pre_read_request(r, conn);
/* Get the request... */
if (!read_request_line(r, tmp_bb) || !ap_parse_request_line(r)) {
apr_brigade_cleanup(tmp_bb);
switch (r->status) {
case HTTP_REQUEST_URI_TOO_LARGE:
case HTTP_BAD_REQUEST:
case HTTP_VERSION_NOT_SUPPORTED:
case HTTP_NOT_IMPLEMENTED:
if (r->status == HTTP_REQUEST_URI_TOO_LARGE) {
ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(00565)
"request failed: client's request-line exceeds LimitRequestLine (longer than %d)",
r->server->limit_req_line);
}
else if (r->method == NULL) {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(00566)
"request failed: malformed request line");
}
access_status = r->status;
goto die_unusable_input;
case HTTP_REQUEST_TIME_OUT:
/* Just log, no further action on this connection. */
ap_update_child_status(conn->sbh, SERVER_BUSY_LOG, NULL);
if (!r->connection->keepalives)
ap_run_log_transaction(r);
break;
}
/* Not worth dying with. */
conn->keepalive = AP_CONN_CLOSE;
apr_pool_destroy(r->pool);
goto ignore;
}
apr_brigade_cleanup(tmp_bb);
/* We may have been in keep_alive_timeout mode, so toggle back
* to the normal timeout mode as we fetch the header lines,
* as necessary.
*/
apply_server_config(r);
if (!r->assbackwards) {
const char *tenc, *clen;
ap_get_mime_headers_core(r, tmp_bb);
apr_brigade_cleanup(tmp_bb);
if (r->status != HTTP_OK) {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(00567)
"request failed: error reading the headers");
access_status = r->status;
goto die_unusable_input;
}
clen = apr_table_get(r->headers_in, "Content-Length");
if (clen) {
apr_off_t cl;
if (!ap_parse_strict_length(&cl, clen)) {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(10242)
"client sent invalid Content-Length "
"(%s): %s", clen, r->uri);
access_status = HTTP_BAD_REQUEST;
goto die_unusable_input;
}
}
tenc = apr_table_get(r->headers_in, "Transfer-Encoding");
if (tenc) {
/* https://tools.ietf.org/html/rfc7230
* Section 3.3.3.3: "If a Transfer-Encoding header field is
* present in a request and the chunked transfer coding is not
* the final encoding ...; the server MUST respond with the 400
* (Bad Request) status code and then close the connection".
*/
if (!ap_is_chunked(r->pool, tenc)) {
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(02539)
"client sent unknown Transfer-Encoding "
"(%s): %s", tenc, r->uri);
access_status = HTTP_BAD_REQUEST;
goto die_unusable_input;
}
/* https://tools.ietf.org/html/rfc7230
* Section 3.3.3.3: "If a message is received with both a
* Transfer-Encoding and a Content-Length header field, the
* Transfer-Encoding overrides the Content-Length. ... A sender
* MUST remove the received Content-Length field".
*/
if (clen) {
apr_table_unset(r->headers_in, "Content-Length");
/* Don't reuse this connection anyway to avoid confusion with
* intermediaries and request/reponse spltting.
*/
conn->keepalive = AP_CONN_CLOSE;
}
}
}
/*
* Add the HTTP_IN filter here to ensure that ap_discard_request_body
* called by ap_die and by ap_send_error_response works correctly on
* status codes that do not cause the connection to be dropped and
* in situations where the connection should be kept alive.
*/
ap_add_input_filter_handle(ap_http_input_filter_handle,
NULL, r, r->connection);
/* Validate Host/Expect headers and select vhost. */
if (!ap_check_request_header(r)) {
/* we may have switched to another server still */
apply_server_config(r);
access_status = r->status;
goto die_before_hooks;
}
/* we may have switched to another server */
apply_server_config(r);
if ((access_status = ap_post_read_request(r))) {
goto die;
}
AP_READ_REQUEST_SUCCESS((uintptr_t)r, (char *)r->method,
(char *)r->uri, (char *)r->server->defn_name,
r->status);
return r;
/* Everything falls through on failure */
die_unusable_input:
/* Input filters are in an undeterminate state, cleanup (including
* CORE_IN's socket) such that any further attempt to read is EOF.
*/
{
ap_filter_t *f = conn->input_filters;
while (f) {
if (f->frec == ap_core_input_filter_handle) {
core_net_rec *net = f->ctx;
apr_brigade_cleanup(net->in_ctx->b);
break;
}
ap_remove_input_filter(f);
f = f->next;
}
conn->input_filters = r->input_filters = f;
conn->keepalive = AP_CONN_CLOSE;
}
die_before_hooks:
/* First call to ap_die() (non recursive) */
r->status = HTTP_OK;
die:
ap_die(access_status, r);
/* ap_die() sent the response through the output filters, we must now
* end the request with an EOR bucket for stream/pipeline accounting.
*/
{
apr_bucket_brigade *eor_bb;
eor_bb = apr_brigade_create(conn->pool, conn->bucket_alloc);
APR_BRIGADE_INSERT_TAIL(eor_bb,
ap_bucket_eor_create(conn->bucket_alloc, r));
ap_pass_brigade(conn->output_filters, eor_bb);
apr_brigade_cleanup(eor_bb);
}
ignore:
r = NULL;
AP_READ_REQUEST_FAILURE((uintptr_t)r);
return NULL;
}
AP_DECLARE(int) ap_post_read_request(request_rec *r)
{
int status;
if ((status = ap_run_post_read_request(r))) {
return status;
}
/* Enforce http(s) only scheme for non-forward-proxy requests */
if (!r->proxyreq
&& r->parsed_uri.scheme
&& (ap_cstr_casecmpn(r->parsed_uri.scheme, "http", 4) != 0
|| (r->parsed_uri.scheme[4] != '\0'
&& (apr_tolower(r->parsed_uri.scheme[4]) != 's'
|| r->parsed_uri.scheme[5] != '\0')))) {
return HTTP_BAD_REQUEST;
}
return OK;
}
/* if a request with a body creates a subrequest, remove original request's
* input headers which pertain to the body which has already been read.
* out-of-line helper function for ap_set_sub_req_protocol.
*/
static void strip_headers_request_body(request_rec *rnew)
{
apr_table_unset(rnew->headers_in, "Content-Encoding");
apr_table_unset(rnew->headers_in, "Content-Language");
apr_table_unset(rnew->headers_in, "Content-Length");
apr_table_unset(rnew->headers_in, "Content-Location");
apr_table_unset(rnew->headers_in, "Content-MD5");
apr_table_unset(rnew->headers_in, "Content-Range");
apr_table_unset(rnew->headers_in, "Content-Type");
apr_table_unset(rnew->headers_in, "Expires");
apr_table_unset(rnew->headers_in, "Last-Modified");
apr_table_unset(rnew->headers_in, "Transfer-Encoding");
}
/*
* A couple of other functions which initialize some of the fields of
* a request structure, as appropriate for adjuncts of one kind or another
* to a request in progress. Best here, rather than elsewhere, since
* *someone* has to set the protocol-specific fields...
*/
AP_DECLARE(void) ap_set_sub_req_protocol(request_rec *rnew,
const request_rec *r)
{
rnew->the_request = r->the_request; /* Keep original request-line */
rnew->assbackwards = 1; /* Don't send headers from this. */
rnew->no_local_copy = 1; /* Don't try to send HTTP_NOT_MODIFIED for a
* fragment. */
rnew->method = "GET";
rnew->method_number = M_GET;
rnew->protocol = "INCLUDED";
rnew->status = HTTP_OK;
rnew->headers_in = apr_table_copy(rnew->pool, r->headers_in);
rnew->trailers_in = apr_table_copy(rnew->pool, r->trailers_in);
/* did the original request have a body? (e.g. POST w/SSI tags)
* if so, make sure the subrequest doesn't inherit body headers
*/
if (!r->kept_body && (apr_table_get(r->headers_in, "Content-Length")
|| apr_table_get(r->headers_in, "Transfer-Encoding"))) {
strip_headers_request_body(rnew);
}
rnew->subprocess_env = apr_table_copy(rnew->pool, r->subprocess_env);
rnew->headers_out = apr_table_make(rnew->pool, 5);
rnew->err_headers_out = apr_table_make(rnew->pool, 5);
rnew->trailers_out = apr_table_make(rnew->pool, 5);
rnew->notes = apr_table_make(rnew->pool, 5);
rnew->expecting_100 = r->expecting_100;
rnew->read_length = r->read_length;
rnew->read_body = REQUEST_NO_BODY;
rnew->main = (request_rec *) r;
}
static void end_output_stream(request_rec *r, int status)
{
conn_rec *c = r->connection;
apr_bucket_brigade *bb;
apr_bucket *b;
bb = apr_brigade_create(r->pool, c->bucket_alloc);
if (status != OK) {
b = ap_bucket_error_create(status, NULL, r->pool, c->bucket_alloc);
APR_BRIGADE_INSERT_TAIL(bb, b);
}
b = apr_bucket_eos_create(c->bucket_alloc);
APR_BRIGADE_INSERT_TAIL(bb, b);
ap_pass_brigade(r->output_filters, bb);
apr_brigade_cleanup(bb);
}
AP_DECLARE(void) ap_finalize_sub_req_protocol(request_rec *sub)
{
/* tell the filter chain there is no more content coming */
if (!sub->eos_sent) {
end_output_stream(sub, OK);
}
}
/* finalize_request_protocol is called at completion of sending the
* response. Its sole purpose is to send the terminating protocol
* information for any wrappers around the response message body
* (i.e., transfer encodings). It should have been named finalize_response.
*/
AP_DECLARE(void) ap_finalize_request_protocol(request_rec *r)
{
int status = ap_discard_request_body(r);
/* tell the filter chain there is no more content coming */
if (!r->eos_sent) {
end_output_stream(r, status);
}
}
/*
* Support for the Basic authentication protocol, and a bit for Digest.
*/
AP_DECLARE(void) ap_note_auth_failure(request_rec *r)
{
const char *type = ap_auth_type(r);
if (type) {
ap_run_note_auth_failure(r, type);
}
else {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00571)
"need AuthType to note auth failure: %s", r->uri);
}
}
AP_DECLARE(void) ap_note_basic_auth_failure(request_rec *r)
{
ap_note_auth_failure(r);
}
AP_DECLARE(void) ap_note_digest_auth_failure(request_rec *r)
{
ap_note_auth_failure(r);
}
AP_DECLARE(int) ap_get_basic_auth_pw(request_rec *r, const char **pw)
{
const char *auth_line = apr_table_get(r->headers_in,
(PROXYREQ_PROXY == r->proxyreq)
? "Proxy-Authorization"
: "Authorization");
const char *t;
--> --------------------
--> maximum size reached
--> --------------------
¤ Dauer der Verarbeitung: 0.11 Sekunden
(vorverarbeitet)
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*© Formatika GbR, Deutschland
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