Adding upstream version 2.4.38.upstream/2.4.38upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 255 insertions, 0 deletions

diff --git a/modules/debugging/mod_dumpio.c b/modules/debugging/mod_dumpio.c
new file mode 100644
index 0000000..8a33860
--- /dev/null
+++ b/modules/debugging/mod_dumpio.c
@@ -0,0 +1,255 @@
+/* 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.
+ */
+
+/*
+ * Originally written @ Covalent by Jim Jagielski
+ */
+
+/*
+ * mod_dumpio.c:
+ *  Think of this as a filter sniffer for Apache 2.x. It logs
+ *  all filter data right before and after it goes out on the
+ *  wire (BUT right before SSL encoded or after SSL decoded).
+ *  It can produce a *huge* amount of data.
+ */
+
+
+#include "httpd.h"
+#include "http_connection.h"
+#include "http_config.h"
+#include "http_core.h"
+#include "http_log.h"
+#include "apr_strings.h"
+
+module AP_MODULE_DECLARE_DATA dumpio_module ;
+
+typedef struct dumpio_conf_t {
+    int enable_input;
+    int enable_output;
+} dumpio_conf_t;
+
+/* consider up to 80 additional characters, and factor the longest
+ * line length of all \xNN sequences; log_error cannot record more
+ * than MAX_STRING_LEN characters.
+ */
+#define dumpio_MAX_STRING_LEN (MAX_STRING_LEN / 4 - 80)
+
+/*
+ * Workhorse function: simply log to the current error_log
+ * info about the data in the bucket as well as the data itself
+ */
+static void dumpit(ap_filter_t *f, apr_bucket *b, dumpio_conf_t *ptr)
+{
+    conn_rec *c = f->c;
+
+    ap_log_cerror(APLOG_MARK, APLOG_TRACE7, 0, c,
+                  "mod_dumpio:  %s (%s-%s): %" APR_SIZE_T_FMT " bytes",
+                  f->frec->name,
+                  (APR_BUCKET_IS_METADATA(b)) ? "metadata" : "data",
+                  b->type->name,
+                  b->length) ;
+
+    if (!(APR_BUCKET_IS_METADATA(b)))
+    {
+#if APR_CHARSET_EBCDIC
+        char xlatebuf[dumpio_MAX_STRING_LEN + 1];
+#endif
+        const char *buf;
+        apr_size_t nbytes;
+        apr_status_t rv = apr_bucket_read(b, &buf, &nbytes, APR_BLOCK_READ);
+
+        if (rv == APR_SUCCESS)
+        {
+            while (nbytes)
+            {
+                apr_size_t logbytes = nbytes;
+                if (logbytes > dumpio_MAX_STRING_LEN)
+                    logbytes = dumpio_MAX_STRING_LEN;
+                nbytes -= logbytes;
+
+#if APR_CHARSET_EBCDIC
+                memcpy(xlatebuf, buf, logbytes);
+                ap_xlate_proto_from_ascii(xlatebuf, logbytes);
+                xlatebuf[logbytes] = '\0';
+                ap_log_cerror(APLOG_MARK, APLOG_TRACE7, 0, c,
+                              "mod_dumpio:  %s (%s-%s): %s", f->frec->name,
+                              (APR_BUCKET_IS_METADATA(b)) ? "metadata" : "data",
+                              b->type->name, xlatebuf);
+#else
+                /* XXX: Seriously flawed; we do not pay attention to embedded
+                 * \0's in the request body, these should be escaped; however,
+                 * the logging function already performs a significant amount
+                 * of escaping, and so any escaping would be double-escaped.
+                 * The coding solution is to throw away the current logic
+                 * within ap_log_error, and introduce new vformatter %-escapes
+                 * for escaping text, and for binary text (fixed len strings).
+                 */
+                ap_log_cerror(APLOG_MARK, APLOG_TRACE7, 0, c,
+                              "mod_dumpio:  %s (%s-%s): %.*s", f->frec->name,
+                              (APR_BUCKET_IS_METADATA(b)) ? "metadata" : "data",
+                              b->type->name, (int)logbytes, buf);
+#endif
+                buf += logbytes;
+            }
+        }
+        else {
+            ap_log_cerror(APLOG_MARK, APLOG_TRACE7, rv, c,
+                          "mod_dumpio:  %s (%s-%s): %s", f->frec->name,
+                          (APR_BUCKET_IS_METADATA(b)) ? "metadata" : "data",
+                          b->type->name, "error reading data");
+        }
+    }
+}
+
+#define whichmode( mode ) \
+ ( (( mode ) == AP_MODE_READBYTES) ? "readbytes" : \
+   (( mode ) == AP_MODE_GETLINE) ? "getline" : \
+   (( mode ) == AP_MODE_EATCRLF) ? "eatcrlf" : \
+   (( mode ) == AP_MODE_SPECULATIVE) ? "speculative" : \
+   (( mode ) == AP_MODE_EXHAUSTIVE) ? "exhaustive" : \
+   (( mode ) == AP_MODE_INIT) ? "init" : "unknown" \
+ )
+
+static int dumpio_input_filter (ap_filter_t *f, apr_bucket_brigade *bb,
+    ap_input_mode_t mode, apr_read_type_e block, apr_off_t readbytes)
+{
+
+    apr_bucket *b;
+    apr_status_t ret;
+    conn_rec *c = f->c;
+    dumpio_conf_t *ptr = f->ctx;
+
+    ap_log_cerror(APLOG_MARK, APLOG_TRACE7, 0, c,
+                  "mod_dumpio: %s [%s-%s] %" APR_OFF_T_FMT " readbytes",
+                  f->frec->name,
+                  whichmode(mode),
+                  ((block) == APR_BLOCK_READ) ? "blocking" : "nonblocking",
+                  readbytes);
+
+    ret = ap_get_brigade(f->next, bb, mode, block, readbytes);
+
+    if (ret == APR_SUCCESS) {
+        for (b = APR_BRIGADE_FIRST(bb); b != APR_BRIGADE_SENTINEL(bb); b = APR_BUCKET_NEXT(b)) {
+          dumpit(f, b, ptr);
+        }
+    }
+    else {
+        ap_log_cerror(APLOG_MARK, APLOG_TRACE7, 0, c,
+                      "mod_dumpio: %s - %d", f->frec->name, ret) ;
+        return ret;
+    }
+
+    return APR_SUCCESS ;
+}
+
+static int dumpio_output_filter (ap_filter_t *f, apr_bucket_brigade *bb)
+{
+    apr_bucket *b;
+    conn_rec *c = f->c;
+    dumpio_conf_t *ptr = f->ctx;
+
+    ap_log_cerror(APLOG_MARK, APLOG_TRACE7, 0, c, "mod_dumpio: %s", f->frec->name);
+
+    for (b = APR_BRIGADE_FIRST(bb); b != APR_BRIGADE_SENTINEL(bb); b = APR_BUCKET_NEXT(b)) {
+        /*
+         * If we ever see an EOS, make sure to FLUSH.
+         */
+        if (APR_BUCKET_IS_EOS(b)) {
+            apr_bucket *flush = apr_bucket_flush_create(f->c->bucket_alloc);
+            APR_BUCKET_INSERT_BEFORE(b, flush);
+        }
+        dumpit(f, b, ptr);
+    }
+
+    return ap_pass_brigade(f->next, bb) ;
+}
+
+static int dumpio_pre_conn(conn_rec *c, void *csd)
+{
+    dumpio_conf_t *ptr;
+
+    if (!APLOGctrace7(c)) {
+        /* Nothing to do below TRACE7 */
+        return DECLINED;
+    }
+
+    ptr = (dumpio_conf_t *) ap_get_module_config(c->base_server->module_config,
+                                                 &dumpio_module);
+
+    if (ptr->enable_input)
+        ap_add_input_filter("DUMPIO_IN", ptr, NULL, c);
+    if (ptr->enable_output)
+        ap_add_output_filter("DUMPIO_OUT", ptr, NULL, c);
+    return OK;
+}
+
+static void dumpio_register_hooks(apr_pool_t *p)
+{
+/*
+ * We know that SSL is CONNECTION + 5
+ */
+  ap_register_output_filter("DUMPIO_OUT", dumpio_output_filter,
+        NULL, AP_FTYPE_CONNECTION + 3) ;
+
+  ap_register_input_filter("DUMPIO_IN", dumpio_input_filter,
+        NULL, AP_FTYPE_CONNECTION + 3) ;
+
+  ap_hook_pre_connection(dumpio_pre_conn, NULL, NULL, APR_HOOK_MIDDLE);
+}
+
+static void *dumpio_create_sconfig(apr_pool_t *p, server_rec *s)
+{
+    dumpio_conf_t *ptr = apr_pcalloc(p, sizeof *ptr);
+    ptr->enable_input = 0;
+    ptr->enable_output = 0;
+    return ptr;
+}
+
+static const char *dumpio_enable_input(cmd_parms *cmd, void *dummy, int arg)
+{
+    dumpio_conf_t *ptr = ap_get_module_config(cmd->server->module_config,
+                                              &dumpio_module);
+
+    ptr->enable_input = arg;
+    return NULL;
+}
+
+static const char *dumpio_enable_output(cmd_parms *cmd, void *dummy, int arg)
+{
+    dumpio_conf_t *ptr = ap_get_module_config(cmd->server->module_config,
+                                              &dumpio_module);
+
+    ptr->enable_output = arg;
+    return NULL;
+}
+
+static const command_rec dumpio_cmds[] = {
+    AP_INIT_FLAG("DumpIOInput", dumpio_enable_input, NULL,
+                 RSRC_CONF, "Enable I/O Dump on Input Data"),
+    AP_INIT_FLAG("DumpIOOutput", dumpio_enable_output, NULL,
+                 RSRC_CONF, "Enable I/O Dump on Output Data"),
+    { NULL }
+};
+
+AP_DECLARE_MODULE(dumpio) = {
+        STANDARD20_MODULE_STUFF,
+        NULL,                   /* create per-dir    config structures */
+        NULL,                   /* merge  per-dir    config structures */
+        dumpio_create_sconfig,  /* create per-server config structures */
+        NULL,                   /* merge  per-server config structures */
+        dumpio_cmds,            /* table of config file commands       */
+        dumpio_register_hooks   /* register hooks                      */
+};