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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 15:01:30 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 15:01:30 +0000
commit6beeb1b708550be0d4a53b272283e17e5e35fe17 (patch)
tree1ce8673d4aaa948e5554000101f46536a1e4cc29 /server/protocol.c
parentInitial commit. (diff)
downloadapache2-6beeb1b708550be0d4a53b272283e17e5e35fe17.tar.xz
apache2-6beeb1b708550be0d4a53b272283e17e5e35fe17.zip
Adding upstream version 2.4.57.upstream/2.4.57upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'server/protocol.c')
-rw-r--r--server/protocol.c2605
1 files changed, 2605 insertions, 0 deletions
diff --git a/server/protocol.c b/server/protocol.c
new file mode 100644
index 0000000..6f9540a
--- /dev/null
+++ b/server/protocol.c
@@ -0,0 +1,2605 @@
+/* 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;
+
+ if (!(t = ap_auth_type(r)) || ap_cstr_casecmp(t, "Basic"))
+ return DECLINED;
+
+ if (!ap_auth_name(r)) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00572)
+ "need AuthName: %s", r->uri);
+ return HTTP_INTERNAL_SERVER_ERROR;
+ }
+
+ if (!auth_line) {
+ ap_note_auth_failure(r);
+ return HTTP_UNAUTHORIZED;
+ }
+
+ if (ap_cstr_casecmp(ap_getword(r->pool, &auth_line, ' '), "Basic")) {
+ /* Client tried to authenticate using wrong auth scheme */
+ ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(00573)
+ "client used wrong authentication scheme: %s", r->uri);
+ ap_note_auth_failure(r);
+ return HTTP_UNAUTHORIZED;
+ }
+
+ while (*auth_line == ' ' || *auth_line == '\t') {
+ auth_line++;
+ }
+
+ t = ap_pbase64decode(r->pool, auth_line);
+ r->user = ap_getword_nulls (r->pool, &t, ':');
+ apr_table_setn(r->notes, AP_GET_BASIC_AUTH_PW_NOTE, "1");
+ r->ap_auth_type = "Basic";
+
+ *pw = t;
+
+ return OK;
+}
+
+AP_DECLARE(apr_status_t) ap_get_basic_auth_components(const request_rec *r,
+ const char **username,
+ const char **password)
+{
+ const char *auth_header;
+ const char *credentials;
+ const char *decoded;
+ const char *user;
+
+ auth_header = (PROXYREQ_PROXY == r->proxyreq) ? "Proxy-Authorization"
+ : "Authorization";
+ credentials = apr_table_get(r->headers_in, auth_header);
+
+ if (!credentials) {
+ /* No auth header. */
+ return APR_EINVAL;
+ }
+
+ if (ap_cstr_casecmp(ap_getword(r->pool, &credentials, ' '), "Basic")) {
+ /* These aren't Basic credentials. */
+ return APR_EINVAL;
+ }
+
+ while (*credentials == ' ' || *credentials == '\t') {
+ credentials++;
+ }
+
+ /* XXX Our base64 decoding functions don't actually error out if the string
+ * we give it isn't base64; they'll just silently stop and hand us whatever
+ * they've parsed up to that point.
+ *
+ * Since this function is supposed to be a drop-in replacement for the
+ * deprecated ap_get_basic_auth_pw(), don't fix this for 2.4.x.
+ */
+ decoded = ap_pbase64decode(r->pool, credentials);
+ user = ap_getword_nulls(r->pool, &decoded, ':');
+
+ if (username) {
+ *username = user;
+ }
+ if (password) {
+ *password = decoded;
+ }
+
+ return APR_SUCCESS;
+}
+
+struct content_length_ctx {
+ int data_sent; /* true if the C-L filter has already sent at
+ * least one bucket on to the next output filter
+ * for this request
+ */
+ apr_bucket_brigade *tmpbb;
+};
+
+/* This filter computes the content length, but it also computes the number
+ * of bytes sent to the client. This means that this filter will always run
+ * through all of the buckets in all brigades
+ */
+AP_CORE_DECLARE_NONSTD(apr_status_t) ap_content_length_filter(
+ ap_filter_t *f,
+ apr_bucket_brigade *b)
+{
+ request_rec *r = f->r;
+ struct content_length_ctx *ctx;
+ apr_bucket *e;
+ int eos = 0;
+ apr_read_type_e eblock = APR_NONBLOCK_READ;
+
+ ctx = f->ctx;
+ if (!ctx) {
+ f->ctx = ctx = apr_palloc(r->pool, sizeof(*ctx));
+ ctx->data_sent = 0;
+ ctx->tmpbb = apr_brigade_create(r->pool, r->connection->bucket_alloc);
+ }
+
+ /* Loop through the brigade to count the length. To avoid
+ * arbitrary memory consumption with morphing bucket types, this
+ * loop will stop and pass on the brigade when necessary. */
+ e = APR_BRIGADE_FIRST(b);
+ while (e != APR_BRIGADE_SENTINEL(b)) {
+ apr_status_t rv;
+
+ if (APR_BUCKET_IS_EOS(e)) {
+ eos = 1;
+ break;
+ }
+ /* For a flush bucket, fall through to pass the brigade and
+ * flush now. */
+ else if (APR_BUCKET_IS_FLUSH(e)) {
+ e = APR_BUCKET_NEXT(e);
+ }
+ /* For metadata bucket types other than FLUSH, loop. */
+ else if (APR_BUCKET_IS_METADATA(e)) {
+ e = APR_BUCKET_NEXT(e);
+ continue;
+ }
+ /* For determinate length data buckets, count the length and
+ * continue. */
+ else if (e->length != (apr_size_t)-1) {
+ r->bytes_sent += e->length;
+ e = APR_BUCKET_NEXT(e);
+ continue;
+ }
+ /* For indeterminate length data buckets, perform one read. */
+ else /* e->length == (apr_size_t)-1 */ {
+ apr_size_t len;
+ const char *ignored;
+
+ rv = apr_bucket_read(e, &ignored, &len, eblock);
+ if ((rv != APR_SUCCESS) && !APR_STATUS_IS_EAGAIN(rv)) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(00574)
+ "ap_content_length_filter: "
+ "apr_bucket_read() failed");
+ return rv;
+ }
+ if (rv == APR_SUCCESS) {
+ eblock = APR_NONBLOCK_READ;
+ e = APR_BUCKET_NEXT(e);
+ r->bytes_sent += len;
+ }
+ else if (APR_STATUS_IS_EAGAIN(rv)) {
+ apr_bucket *flush;
+
+ /* Next read must block. */
+ eblock = APR_BLOCK_READ;
+
+ /* Ensure the last bucket to pass down is a flush if
+ * the next read will block. */
+ flush = apr_bucket_flush_create(f->c->bucket_alloc);
+ APR_BUCKET_INSERT_BEFORE(e, flush);
+ }
+ }
+
+ /* Optimization: if the next bucket is EOS (directly after a
+ * bucket morphed to the heap, or a flush), short-cut to
+ * handle EOS straight away - allowing C-L to be determined
+ * for content which is already entirely in memory. */
+ if (e != APR_BRIGADE_SENTINEL(b) && APR_BUCKET_IS_EOS(e)) {
+ continue;
+ }
+
+ /* On reaching here, pass on everything in the brigade up to
+ * this point. */
+ apr_brigade_split_ex(b, e, ctx->tmpbb);
+
+ rv = ap_pass_brigade(f->next, b);
+ if (rv != APR_SUCCESS) {
+ return rv;
+ }
+ else if (f->c->aborted) {
+ return APR_ECONNABORTED;
+ }
+ apr_brigade_cleanup(b);
+ APR_BRIGADE_CONCAT(b, ctx->tmpbb);
+ e = APR_BRIGADE_FIRST(b);
+
+ ctx->data_sent = 1;
+ }
+
+ /* If we've now seen the entire response and it's otherwise
+ * okay to set the C-L in the response header, then do so now.
+ *
+ * We can only set a C-L in the response header if we haven't already
+ * sent any buckets on to the next output filter for this request.
+ */
+ if (ctx->data_sent == 0 && eos &&
+ /* don't whack the C-L if it has already been set for a HEAD
+ * by something like proxy. the brigade only has an EOS bucket
+ * in this case, making r->bytes_sent zero.
+ *
+ * if r->bytes_sent > 0 we have a (temporary) body whose length may
+ * have been changed by a filter. the C-L header might not have been
+ * updated so we do it here. long term it would be cleaner to have
+ * such filters update or remove the C-L header, and just use it
+ * if present.
+ */
+ !((r->header_only || AP_STATUS_IS_HEADER_ONLY(r->status)) && r->bytes_sent == 0 &&
+ apr_table_get(r->headers_out, "Content-Length"))) {
+ ap_set_content_length(r, r->bytes_sent);
+ }
+
+ ctx->data_sent = 1;
+ return ap_pass_brigade(f->next, b);
+}
+
+/*
+ * Send the body of a response to the client.
+ */
+AP_DECLARE(apr_status_t) ap_send_fd(apr_file_t *fd, request_rec *r,
+ apr_off_t offset, apr_size_t len,
+ apr_size_t *nbytes)
+{
+ conn_rec *c = r->connection;
+ apr_bucket_brigade *bb = NULL;
+ apr_status_t rv;
+
+ bb = apr_brigade_create(r->pool, c->bucket_alloc);
+
+ apr_brigade_insert_file(bb, fd, offset, len, r->pool);
+
+ rv = ap_pass_brigade(r->output_filters, bb);
+ if (rv != APR_SUCCESS) {
+ *nbytes = 0; /* no way to tell how many were actually sent */
+ }
+ else {
+ *nbytes = len;
+ }
+
+ return rv;
+}
+
+#if APR_HAS_MMAP
+/* send data from an in-memory buffer */
+AP_DECLARE(apr_size_t) ap_send_mmap(apr_mmap_t *mm,
+ request_rec *r,
+ apr_size_t offset,
+ apr_size_t length)
+{
+ conn_rec *c = r->connection;
+ apr_bucket_brigade *bb = NULL;
+ apr_bucket *b;
+
+ bb = apr_brigade_create(r->pool, c->bucket_alloc);
+ b = apr_bucket_mmap_create(mm, offset, length, c->bucket_alloc);
+ APR_BRIGADE_INSERT_TAIL(bb, b);
+ ap_pass_brigade(r->output_filters, bb);
+
+ return mm->size; /* XXX - change API to report apr_status_t? */
+}
+#endif /* APR_HAS_MMAP */
+
+typedef struct {
+ apr_bucket_brigade *bb;
+ apr_bucket_brigade *tmpbb;
+} old_write_filter_ctx;
+
+AP_CORE_DECLARE_NONSTD(apr_status_t) ap_old_write_filter(
+ ap_filter_t *f, apr_bucket_brigade *bb)
+{
+ old_write_filter_ctx *ctx = f->ctx;
+
+ AP_DEBUG_ASSERT(ctx);
+
+ if (ctx->bb != NULL) {
+ /* whatever is coming down the pipe (we don't care), we
+ * can simply insert our buffered data at the front and
+ * pass the whole bundle down the chain.
+ */
+ APR_BRIGADE_PREPEND(bb, ctx->bb);
+ }
+
+ return ap_pass_brigade(f->next, bb);
+}
+
+static ap_filter_t *insert_old_write_filter(request_rec *r)
+{
+ ap_filter_t *f;
+ old_write_filter_ctx *ctx;
+
+ /* future optimization: record some flags in the request_rec to
+ * say whether we've added our filter, and whether it is first.
+ */
+
+ /* this will typically exit on the first test */
+ for (f = r->output_filters; f != NULL; f = f->next) {
+ if (ap_old_write_func == f->frec)
+ break;
+ }
+
+ if (f == NULL) {
+ /* our filter hasn't been added yet */
+ ctx = apr_pcalloc(r->pool, sizeof(*ctx));
+ ctx->tmpbb = apr_brigade_create(r->pool, r->connection->bucket_alloc);
+
+ ap_add_output_filter("OLD_WRITE", ctx, r, r->connection);
+ f = r->output_filters;
+ }
+
+ return f;
+}
+
+static apr_status_t buffer_output(request_rec *r,
+ const char *str, apr_size_t len)
+{
+ conn_rec *c = r->connection;
+ ap_filter_t *f;
+ old_write_filter_ctx *ctx;
+
+ if (len == 0)
+ return APR_SUCCESS;
+
+ f = insert_old_write_filter(r);
+ ctx = f->ctx;
+
+ /* if the first filter is not our buffering filter, then we have to
+ * deliver the content through the normal filter chain
+ */
+ if (f != r->output_filters) {
+ apr_status_t rv;
+ apr_bucket *b = apr_bucket_transient_create(str, len, c->bucket_alloc);
+ APR_BRIGADE_INSERT_TAIL(ctx->tmpbb, b);
+
+ rv = ap_pass_brigade(r->output_filters, ctx->tmpbb);
+ apr_brigade_cleanup(ctx->tmpbb);
+ return rv;
+ }
+
+ if (ctx->bb == NULL) {
+ ctx->bb = apr_brigade_create(r->pool, c->bucket_alloc);
+ }
+
+ return ap_fwrite(f->next, ctx->bb, str, len);
+}
+
+AP_DECLARE(int) ap_rputc(int c, request_rec *r)
+{
+ char c2 = (char)c;
+
+ if (r->connection->aborted) {
+ return -1;
+ }
+
+ if (buffer_output(r, &c2, 1) != APR_SUCCESS)
+ return -1;
+
+ return c;
+}
+
+AP_DECLARE(int) ap_rwrite(const void *buf, int nbyte, request_rec *r)
+{
+ if (nbyte < 0)
+ return -1;
+
+ if (r->connection->aborted)
+ return -1;
+
+ if (buffer_output(r, buf, nbyte) != APR_SUCCESS)
+ return -1;
+
+ return nbyte;
+}
+
+struct ap_vrprintf_data {
+ apr_vformatter_buff_t vbuff;
+ request_rec *r;
+ char *buff;
+};
+
+/* Flush callback for apr_vformatter; returns -1 on error. */
+static int r_flush(apr_vformatter_buff_t *buff)
+{
+ /* callback function passed to ap_vformatter to be called when
+ * vformatter needs to write into buff and buff.curpos > buff.endpos */
+
+ /* ap_vrprintf_data passed as a apr_vformatter_buff_t, which is then
+ * "downcast" to an ap_vrprintf_data */
+ struct ap_vrprintf_data *vd = (struct ap_vrprintf_data*)buff;
+
+ if (vd->r->connection->aborted)
+ return -1;
+
+ /* r_flush is called when vbuff is completely full */
+ if (buffer_output(vd->r, vd->buff, AP_IOBUFSIZE)) {
+ return -1;
+ }
+
+ /* reset the buffer position */
+ vd->vbuff.curpos = vd->buff;
+ vd->vbuff.endpos = vd->buff + AP_IOBUFSIZE;
+
+ return 0;
+}
+
+AP_DECLARE(int) ap_vrprintf(request_rec *r, const char *fmt, va_list va)
+{
+ int written;
+ struct ap_vrprintf_data vd;
+ char vrprintf_buf[AP_IOBUFSIZE];
+
+ vd.vbuff.curpos = vrprintf_buf;
+ vd.vbuff.endpos = vrprintf_buf + AP_IOBUFSIZE;
+ vd.r = r;
+ vd.buff = vrprintf_buf;
+
+ if (r->connection->aborted)
+ return -1;
+
+ written = apr_vformatter(r_flush, &vd.vbuff, fmt, va);
+
+ if (written != -1) {
+ int n = vd.vbuff.curpos - vrprintf_buf;
+
+ /* last call to buffer_output, to finish clearing the buffer */
+ if (buffer_output(r, vrprintf_buf, n) != APR_SUCCESS)
+ return -1;
+
+ written += n;
+ }
+
+ return written;
+}
+
+AP_DECLARE_NONSTD(int) ap_rprintf(request_rec *r, const char *fmt, ...)
+{
+ va_list va;
+ int n;
+
+ if (r->connection->aborted)
+ return -1;
+
+ va_start(va, fmt);
+ n = ap_vrprintf(r, fmt, va);
+ va_end(va);
+
+ return n;
+}
+
+AP_DECLARE_NONSTD(int) ap_rvputs(request_rec *r, ...)
+{
+ va_list va;
+ const char *s;
+ apr_size_t len;
+ apr_size_t written = 0;
+
+ if (r->connection->aborted)
+ return -1;
+
+ /* ### TODO: if the total output is large, put all the strings
+ * ### into a single brigade, rather than flushing each time we
+ * ### fill the buffer
+ */
+ va_start(va, r);
+ while (1) {
+ s = va_arg(va, const char *);
+ if (s == NULL)
+ break;
+
+ len = strlen(s);
+ if (buffer_output(r, s, len) != APR_SUCCESS) {
+ va_end(va);
+ return -1;
+ }
+
+ written += len;
+ }
+ va_end(va);
+
+ return written;
+}
+
+AP_DECLARE(int) ap_rflush(request_rec *r)
+{
+ conn_rec *c = r->connection;
+ apr_bucket *b;
+ ap_filter_t *f;
+ old_write_filter_ctx *ctx;
+ apr_status_t rv;
+
+ f = insert_old_write_filter(r);
+ ctx = f->ctx;
+
+ b = apr_bucket_flush_create(c->bucket_alloc);
+ APR_BRIGADE_INSERT_TAIL(ctx->tmpbb, b);
+
+ rv = ap_pass_brigade(r->output_filters, ctx->tmpbb);
+ apr_brigade_cleanup(ctx->tmpbb);
+ if (rv != APR_SUCCESS)
+ return -1;
+
+ return 0;
+}
+
+/*
+ * This function sets the Last-Modified output header field to the value
+ * of the mtime field in the request structure - rationalized to keep it from
+ * being in the future.
+ */
+AP_DECLARE(void) ap_set_last_modified(request_rec *r)
+{
+ if (!r->assbackwards) {
+ apr_time_t mod_time = ap_rationalize_mtime(r, r->mtime);
+ char *datestr = apr_palloc(r->pool, APR_RFC822_DATE_LEN);
+
+ apr_rfc822_date(datestr, mod_time);
+ apr_table_setn(r->headers_out, "Last-Modified", datestr);
+ }
+}
+
+typedef struct hdr_ptr {
+ ap_filter_t *f;
+ apr_bucket_brigade *bb;
+} hdr_ptr;
+
+#if APR_CHARSET_EBCDIC
+static int send_header(void *data, const char *key, const char *val)
+{
+ char *header_line = NULL;
+ hdr_ptr *hdr = (hdr_ptr*)data;
+
+ header_line = apr_pstrcat(hdr->bb->p, key, ": ", val, CRLF, NULL);
+ ap_xlate_proto_to_ascii(header_line, strlen(header_line));
+ ap_fputs(hdr->f, hdr->bb, header_line);
+ return 1;
+}
+#else
+static int send_header(void *data, const char *key, const char *val)
+{
+ ap_fputstrs(((hdr_ptr*)data)->f, ((hdr_ptr*)data)->bb,
+ key, ": ", val, CRLF, NULL);
+ return 1;
+ }
+#endif
+
+AP_DECLARE(void) ap_send_interim_response(request_rec *r, int send_headers)
+{
+ hdr_ptr x;
+ char *response_line = NULL;
+ const char *status_line;
+ request_rec *rr;
+
+ if (r->proto_num < HTTP_VERSION(1,1)) {
+ /* don't send interim response to HTTP/1.0 Client */
+ return;
+ }
+ if (!ap_is_HTTP_INFO(r->status)) {
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(00575)
+ "Status is %d - not sending interim response", r->status);
+ return;
+ }
+ if (r->status == HTTP_CONTINUE) {
+ if (!r->expecting_100) {
+ /*
+ * Don't send 100-Continue when there was no Expect: 100-continue
+ * in the request headers. For origin servers this is a SHOULD NOT
+ * for proxies it is a MUST NOT according to RFC 2616 8.2.3
+ */
+ return;
+ }
+
+ /* if we send an interim response, we're no longer in a state of
+ * expecting one. Also, this could feasibly be in a subrequest,
+ * so we need to propagate the fact that we responded.
+ */
+ for (rr = r; rr != NULL; rr = rr->main) {
+ rr->expecting_100 = 0;
+ }
+ }
+
+ status_line = r->status_line;
+ if (status_line == NULL) {
+ status_line = ap_get_status_line_ex(r->pool, r->status);
+ }
+ response_line = apr_pstrcat(r->pool,
+ AP_SERVER_PROTOCOL " ", status_line, CRLF,
+ NULL);
+ ap_xlate_proto_to_ascii(response_line, strlen(response_line));
+
+ x.f = r->connection->output_filters;
+ x.bb = apr_brigade_create(r->pool, r->connection->bucket_alloc);
+
+ ap_fputs(x.f, x.bb, response_line);
+ if (send_headers) {
+ apr_table_do(send_header, &x, r->headers_out, NULL);
+ apr_table_clear(r->headers_out);
+ }
+ ap_fputs(x.f, x.bb, CRLF_ASCII);
+ ap_fflush(x.f, x.bb);
+ apr_brigade_destroy(x.bb);
+}
+
+/*
+ * Compare two protocol identifier. Result is similar to strcmp():
+ * 0 gives same precedence, >0 means proto1 is preferred.
+ */
+static int protocol_cmp(const apr_array_header_t *preferences,
+ const char *proto1,
+ const char *proto2)
+{
+ if (preferences && preferences->nelts > 0) {
+ int index1 = ap_array_str_index(preferences, proto1, 0);
+ int index2 = ap_array_str_index(preferences, proto2, 0);
+ if (index2 > index1) {
+ return (index1 >= 0) ? 1 : -1;
+ }
+ else if (index1 > index2) {
+ return (index2 >= 0) ? -1 : 1;
+ }
+ }
+ /* both have the same index (maybe -1 or no pref configured) and we compare
+ * the names so that spdy3 gets precedence over spdy2. That makes
+ * the outcome at least deterministic. */
+ return strcmp(proto1, proto2);
+}
+
+AP_DECLARE(const char *) ap_get_protocol(conn_rec *c)
+{
+ const char *protocol = ap_run_protocol_get(c);
+ return protocol? protocol : AP_PROTOCOL_HTTP1;
+}
+
+AP_DECLARE(apr_status_t) ap_get_protocol_upgrades(conn_rec *c, request_rec *r,
+ server_rec *s, int report_all,
+ const apr_array_header_t **pupgrades)
+{
+ apr_pool_t *pool = r? r->pool : c->pool;
+ core_server_config *conf;
+ const char *existing;
+ apr_array_header_t *upgrades = NULL;
+
+ if (!s) {
+ s = (r? r->server : c->base_server);
+ }
+ conf = ap_get_core_module_config(s->module_config);
+
+ if (conf->protocols->nelts > 0) {
+ existing = ap_get_protocol(c);
+ if (conf->protocols->nelts > 1
+ || !ap_array_str_contains(conf->protocols, existing)) {
+ int i;
+
+ /* possibly more than one choice or one, but not the
+ * existing. (TODO: maybe 426 and Upgrade then?) */
+ upgrades = apr_array_make(pool, conf->protocols->nelts + 1,
+ sizeof(char *));
+ for (i = 0; i < conf->protocols->nelts; i++) {
+ const char *p = APR_ARRAY_IDX(conf->protocols, i, char *);
+ if (strcmp(existing, p)) {
+ /* not the one we have and possible, add in this order */
+ APR_ARRAY_PUSH(upgrades, const char*) = p;
+ }
+ else if (!report_all) {
+ break;
+ }
+ }
+ }
+ }
+
+ *pupgrades = upgrades;
+ return APR_SUCCESS;
+}
+
+AP_DECLARE(const char *) ap_select_protocol(conn_rec *c, request_rec *r,
+ server_rec *s,
+ const apr_array_header_t *choices)
+{
+ apr_pool_t *pool = r? r->pool : c->pool;
+ core_server_config *conf;
+ const char *protocol = NULL, *existing;
+ apr_array_header_t *proposals;
+
+ if (!s) {
+ s = (r? r->server : c->base_server);
+ }
+ conf = ap_get_core_module_config(s->module_config);
+
+ if (APLOGcdebug(c)) {
+ const char *p = apr_array_pstrcat(pool, conf->protocols, ',');
+ ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, c, APLOGNO(03155)
+ "select protocol from %s, choices=%s for server %s",
+ p, apr_array_pstrcat(pool, choices, ','),
+ s->server_hostname);
+ }
+
+ if (conf->protocols->nelts <= 0) {
+ /* nothing configured, by default, we only allow http/1.1 here.
+ * For now...
+ */
+ if (ap_array_str_contains(choices, AP_PROTOCOL_HTTP1)) {
+ return AP_PROTOCOL_HTTP1;
+ }
+ else {
+ return NULL;
+ }
+ }
+
+ proposals = apr_array_make(pool, choices->nelts + 1, sizeof(char *));
+ ap_run_protocol_propose(c, r, s, choices, proposals);
+
+ /* If the existing protocol has not been proposed, but is a choice,
+ * add it to the proposals implicitly.
+ */
+ existing = ap_get_protocol(c);
+ if (!ap_array_str_contains(proposals, existing)
+ && ap_array_str_contains(choices, existing)) {
+ APR_ARRAY_PUSH(proposals, const char*) = existing;
+ }
+
+ if (proposals->nelts > 0) {
+ int i;
+ const apr_array_header_t *prefs = NULL;
+
+ /* Default for protocols_honor_order is 'on' or != 0 */
+ if (conf->protocols_honor_order == 0 && choices->nelts > 0) {
+ prefs = choices;
+ }
+ else {
+ prefs = conf->protocols;
+ }
+
+ /* Select the most preferred protocol */
+ if (APLOGcdebug(c)) {
+ ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, c, APLOGNO(03156)
+ "select protocol, proposals=%s preferences=%s configured=%s",
+ apr_array_pstrcat(pool, proposals, ','),
+ apr_array_pstrcat(pool, prefs, ','),
+ apr_array_pstrcat(pool, conf->protocols, ','));
+ }
+ for (i = 0; i < proposals->nelts; ++i) {
+ const char *p = APR_ARRAY_IDX(proposals, i, const char *);
+ if (!ap_array_str_contains(conf->protocols, p)) {
+ /* not a configured protocol here */
+ continue;
+ }
+ else if (!protocol
+ || (protocol_cmp(prefs, protocol, p) < 0)) {
+ /* none selected yet or this one has preference */
+ protocol = p;
+ }
+ }
+ }
+ if (APLOGcdebug(c)) {
+ ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, c, APLOGNO(03157)
+ "selected protocol=%s",
+ protocol? protocol : "(none)");
+ }
+
+ return protocol;
+}
+
+AP_DECLARE(apr_status_t) ap_switch_protocol(conn_rec *c, request_rec *r,
+ server_rec *s,
+ const char *protocol)
+{
+ const char *current = ap_get_protocol(c);
+ int rc;
+
+ if (!strcmp(current, protocol)) {
+ ap_log_cerror(APLOG_MARK, APLOG_WARNING, 0, c, APLOGNO(02906)
+ "already at it, protocol_switch to %s",
+ protocol);
+ return APR_SUCCESS;
+ }
+
+ rc = ap_run_protocol_switch(c, r, s, protocol);
+ switch (rc) {
+ case DECLINED:
+ ap_log_cerror(APLOG_MARK, APLOG_ERR, 0, c, APLOGNO(02907)
+ "no implementation for protocol_switch to %s",
+ protocol);
+ return APR_ENOTIMPL;
+ case OK:
+ case DONE:
+ return APR_SUCCESS;
+ default:
+ ap_log_cerror(APLOG_MARK, APLOG_ERR, 0, c, APLOGNO(02905)
+ "unexpected return code %d from protocol_switch to %s"
+ , rc, protocol);
+ return APR_EOF;
+ }
+}
+
+AP_DECLARE(int) ap_is_allowed_protocol(conn_rec *c, request_rec *r,
+ server_rec *s, const char *protocol)
+{
+ core_server_config *conf;
+
+ if (!s) {
+ s = (r? r->server : c->base_server);
+ }
+ conf = ap_get_core_module_config(s->module_config);
+
+ if (conf->protocols->nelts > 0) {
+ return ap_array_str_contains(conf->protocols, protocol);
+ }
+ return !strcmp(AP_PROTOCOL_HTTP1, protocol);
+}
+
+
+AP_IMPLEMENT_HOOK_VOID(pre_read_request,
+ (request_rec *r, conn_rec *c),
+ (r, c))
+AP_IMPLEMENT_HOOK_RUN_ALL(int,post_read_request,
+ (request_rec *r), (r), OK, DECLINED)
+AP_IMPLEMENT_HOOK_RUN_ALL(int,log_transaction,
+ (request_rec *r), (r), OK, DECLINED)
+AP_IMPLEMENT_HOOK_RUN_FIRST(const char *,http_scheme,
+ (const request_rec *r), (r), NULL)
+AP_IMPLEMENT_HOOK_RUN_FIRST(unsigned short,default_port,
+ (const request_rec *r), (r), 0)
+AP_IMPLEMENT_HOOK_RUN_FIRST(int, note_auth_failure,
+ (request_rec *r, const char *auth_type),
+ (r, auth_type), DECLINED)
+AP_IMPLEMENT_HOOK_RUN_ALL(int,protocol_propose,
+ (conn_rec *c, request_rec *r, server_rec *s,
+ const apr_array_header_t *offers,
+ apr_array_header_t *proposals),
+ (c, r, s, offers, proposals), OK, DECLINED)
+AP_IMPLEMENT_HOOK_RUN_FIRST(int,protocol_switch,
+ (conn_rec *c, request_rec *r, server_rec *s,
+ const char *protocol),
+ (c, r, s, protocol), DECLINED)
+AP_IMPLEMENT_HOOK_RUN_FIRST(const char *,protocol_get,
+ (const conn_rec *c), (c), NULL)
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-26 11:55:23 +0000