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