Adding upstream version 4.2.2.upstream/4.2.2

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

1 files changed, 76 insertions, 0 deletions

diff --git a/epan/req_resp_hdrs.h b/epan/req_resp_hdrs.h
new file mode 100644
index 00000000..71c67213
--- /dev/null
+++ b/epan/req_resp_hdrs.h
@@ -0,0 +1,76 @@
+/** @file
+ * Declarations of routines handling protocols with a request/response line,
+ * headers, a blank line, and an optional body.
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#ifndef __REQ_RESP_HDRS_H__
+#define __REQ_RESP_HDRS_H__
+
+#include "ws_symbol_export.h"
+#include "wsutil/strtoi.h"
+
+/**
+ * Optionally do reassembly of the request/response line, headers, and body.
+ *
+ *  @param tvb  The buffer.
+ *  @param offset   The offset in the buffer to begin inspection.
+ *  @param pinfo    Packet info from the parent protocol.
+ *  @param desegment_headers    Do desegmentation on headers.
+ *  @param desegment_body   Do desegmentation on body.
+ *  @param desegment_until_fin  When desegment_body is enabled and no
+ *  Content-Length header is found, assume that all data following the headers
+ *  are part of the body.
+ *  @param[in,out] last_chunk_offset  For the chunked Transfer-Encoding,
+ *  the offset (relative to the initial tvb offset) of the last chunk size
+ *  found.  The result can be fed back into a future call in order to skip
+ *  to a later chunk and reduce processing from O(N^2) to O(N).  Use 0 for
+ *  the initial call.  Only set when chunked TE is found.  May be NULL.
+ *  @param streaming_subdissector_table   For searching a streaming reassembly
+ *  mode supported subdissector on it by the content-type header value.
+ *  @param[out] streaming_chunk_handle   Only set when this is the beginning of
+ *  a chunk stream. (There is 'Transfer-Encoding: chunked' header and a
+ *  streaming reassembly mode supported subdissector is found according to
+ *  Content-Type header)
+ *  @return TRUE if desegmentation is complete otherwise FALSE
+ */
+WS_DLL_PUBLIC gboolean
+req_resp_hdrs_do_reassembly(tvbuff_t *tvb, const  int offset, packet_info *pinfo,
+    const gboolean desegment_headers, const gboolean desegment_body,
+    gboolean desegment_until_fin, int *last_chunk_offset,
+	dissector_table_t streaming_subdissector_table, dissector_handle_t *streaming_chunk_handle);
+
+/** Check whether the first line is the beginning of a chunk. */
+static inline gboolean
+starts_with_chunk_size(tvbuff_t* tvb, const int offset, packet_info* pinfo)
+{
+	guint chunk_size = 0;
+	gint linelen = tvb_find_line_end(tvb, offset, tvb_reported_length_remaining(tvb, offset), NULL, TRUE);
+
+	if (linelen < 0)
+		return FALSE;
+
+	gchar* chunk_string = tvb_get_string_enc(pinfo->pool, tvb, offset, linelen, ENC_ASCII);
+	gchar* c = chunk_string;
+
+	/* ignore extensions, including optional BWS ("bad whitespace")
+         * in the grammar for historical reasons, see RFC 9112 7.1.1.
+         */
+	if ((c = strpbrk(c, "; \t"))) {
+		*c = '\0';
+	}
+
+        if (!ws_hexstrtou32(chunk_string, NULL, &chunk_size)) {
+		return FALSE; /* can not get chunk size*/
+	} else if (chunk_size > (1U << 31)) {
+		return FALSE; /* chunk size is unreasonable */
+	}
+	return TRUE;
+}
+
+#endif