From Tom Hughes: FastCGI dissector.
See: https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=5067 From me: - Fix one bug; - Add a comment about some code which doesn't display info in COL_INFO as intended due to what seems to be a Wireshark bug in tcp_dissect_pdus() when there are multiple records in a TCP frame. svn path=/trunk/; revision=33824
This commit is contained in:
parent
37dbda5b82
commit
3398f73455
4
AUTHORS
4
AUTHORS
|
@ -3110,6 +3110,10 @@ Herbert Lischka <herbert [AT] lischka-berlin.de> {
|
|||
BACNET dissector fixes and enhancements
|
||||
}
|
||||
|
||||
Tom Hughes <tom [AT] compton.nu> {
|
||||
FCGI dissector
|
||||
}
|
||||
|
||||
|
||||
and by:
|
||||
|
||||
|
|
|
@ -537,6 +537,7 @@ set(DISSECTOR_SRC
|
|||
dissectors/packet-fcels.c
|
||||
dissectors/packet-fcfcs.c
|
||||
dissectors/packet-fcfzs.c
|
||||
dissectors/packet-fcgi.c
|
||||
dissectors/packet-fcip.c
|
||||
dissectors/packet-fclctl.c
|
||||
dissectors/packet-fcoe.c
|
||||
|
|
|
@ -447,6 +447,7 @@ DISSECTOR_SRC = \
|
|||
packet-fcels.c \
|
||||
packet-fcfcs.c \
|
||||
packet-fcfzs.c \
|
||||
packet-fcgi.c \
|
||||
packet-fcip.c \
|
||||
packet-fclctl.c \
|
||||
packet-fcoe.c \
|
||||
|
|
|
@ -0,0 +1,430 @@
|
|||
/* packet-fcgi.c
|
||||
* Routines for FastCGI dissection
|
||||
* Copyright 2010, Tom Hughes <tom@compton.nu>
|
||||
*
|
||||
* $Id$
|
||||
*
|
||||
* Wireshark - Network traffic analyzer
|
||||
* By Gerald Combs <gerald@wireshark.org>
|
||||
* Copyright 1998 Gerald Combs
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License along
|
||||
* with this program; if not, write to the Free Software Foundation, Inc.,
|
||||
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
||||
*/
|
||||
|
||||
#ifdef HAVE_CONFIG_H
|
||||
# include "config.h"
|
||||
#endif
|
||||
|
||||
#include <epan/packet.h>
|
||||
#include <epan/prefs.h>
|
||||
#include "packet-tcp.h"
|
||||
|
||||
static int proto_fcgi = -1;
|
||||
|
||||
static guint tcp_port = 0;
|
||||
|
||||
static int hf_fcgi_version = -1;
|
||||
static int hf_fcgi_type = -1;
|
||||
static int hf_fcgi_id = -1;
|
||||
static int hf_fcgi_content_length = -1;
|
||||
static int hf_fcgi_padding_length = -1;
|
||||
static int hf_fcgi_content_data = -1;
|
||||
static int hf_fcgi_padding_data = -1;
|
||||
static int hf_fcgi_begin_request_role = -1;
|
||||
static int hf_fcgi_begin_request_flags = -1;
|
||||
static int hf_fcgi_begin_request_keep_conn = -1;
|
||||
static int hf_fcgi_end_request_app_status = -1;
|
||||
static int hf_fcgi_end_request_protocol_status = -1;
|
||||
|
||||
static int ett_fcgi = -1;
|
||||
static int ett_fcgi_begin_request = -1;
|
||||
static int ett_fcgi_abort_request = -1;
|
||||
static int ett_fcgi_end_request = -1;
|
||||
static int ett_fcgi_params = -1;
|
||||
|
||||
#define FCGI_BEGIN_REQUEST 1
|
||||
#define FCGI_ABORT_REQUEST 2
|
||||
#define FCGI_END_REQUEST 3
|
||||
#define FCGI_PARAMS 4
|
||||
#define FCGI_STDIN 5
|
||||
#define FCGI_STDOUT 6
|
||||
#define FCGI_STDERR 7
|
||||
#define FCGI_DATA 8
|
||||
#define FCGI_GET_VALUES 9
|
||||
#define FCGI_GET_VALUES_RESULT 10
|
||||
#define FCGI_UNKNOWN_TYPE 11
|
||||
|
||||
static const value_string record_types[] = {
|
||||
{ 1, "FCGI_BEGIN_REQUEST" },
|
||||
{ 2, "FCGI_ABORT_REQUEST" },
|
||||
{ 3, "FCGI_END_REQUEST" },
|
||||
{ 4, "FCGI_PARAMS" },
|
||||
{ 5, "FCGI_STDIN" },
|
||||
{ 6, "FCGI_STDOUT" },
|
||||
{ 7, "FCGI_STDERR" },
|
||||
{ 8, "FCGI_DATA" },
|
||||
{ 9, "FCGI_GET_VALUES" },
|
||||
{ 10, "FCGI_GET_VALUES_RESULT" },
|
||||
{ 11, "FCGI_UNKNOWN_TYPE" },
|
||||
{ 0, NULL }
|
||||
};
|
||||
|
||||
static const value_string application_roles[] = {
|
||||
{ 1, "FCGI_RESPONDER" },
|
||||
{ 2, "FCGI_AUTHORIZER" },
|
||||
{ 3, "FCGI_FILTER" },
|
||||
{ 0, NULL }
|
||||
};
|
||||
|
||||
#define FCGI_KEEP_CONN 1
|
||||
|
||||
static const value_string protocol_statuses[] = {
|
||||
{ 0, "FCGI_REQUEST_COMPLETE" },
|
||||
{ 1, "FCGI_CANT_MPX_CONN" },
|
||||
{ 2, "FCGI_OVERLOADED" },
|
||||
{ 3, "FCGI_UNKNOWN_ROLE" },
|
||||
{ 0, NULL }
|
||||
};
|
||||
|
||||
void proto_reg_handoff_fcgi(void);
|
||||
|
||||
static void
|
||||
dissect_nv_pairs(tvbuff_t *tvb, proto_tree *fcgi_tree, gint offset, guint16 len)
|
||||
{
|
||||
gint end_offset = offset + len;
|
||||
|
||||
while (offset < end_offset) {
|
||||
gint start_offset = offset;
|
||||
guint32 namelen;
|
||||
guint32 valuelen;
|
||||
char *name;
|
||||
char *value;
|
||||
|
||||
namelen = tvb_get_guint8(tvb, offset);
|
||||
if ((namelen & 0x80) == 0) {
|
||||
offset += 1;
|
||||
} else {
|
||||
namelen = tvb_get_ntohl(tvb, offset) && 0x7FFFFFFF;
|
||||
offset += 4;
|
||||
}
|
||||
|
||||
valuelen = tvb_get_guint8(tvb, offset);
|
||||
if ((valuelen & 0x80) == 0) {
|
||||
offset += 1;
|
||||
} else {
|
||||
valuelen = tvb_get_ntohl(tvb, offset) && 0x7FFFFFF;
|
||||
offset += 4;
|
||||
}
|
||||
|
||||
name = tvb_get_ephemeral_string(tvb, offset, namelen);
|
||||
offset += namelen;
|
||||
|
||||
if (valuelen > 0) {
|
||||
value = tvb_get_ephemeral_string(tvb, offset, valuelen);
|
||||
offset += valuelen;
|
||||
|
||||
proto_tree_add_text(fcgi_tree, tvb, start_offset, offset - start_offset, "%s = %s", name, value);
|
||||
} else {
|
||||
proto_tree_add_text(fcgi_tree, tvb, start_offset, offset - start_offset, "%s", name);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
dissect_begin_request(tvbuff_t *tvb, proto_tree *fcgi_tree, gint offset, guint16 len)
|
||||
{
|
||||
proto_item *br;
|
||||
proto_tree *br_tree;
|
||||
|
||||
br = proto_tree_add_text(fcgi_tree, tvb, offset, len, "Begin Request:");
|
||||
br_tree = proto_item_add_subtree(br, ett_fcgi_begin_request);
|
||||
|
||||
proto_tree_add_item(br_tree, hf_fcgi_begin_request_role, tvb, offset, 2, FALSE);
|
||||
offset += 2;
|
||||
|
||||
proto_tree_add_item(br_tree, hf_fcgi_begin_request_flags, tvb, offset, 1, FALSE);
|
||||
proto_tree_add_item(br_tree, hf_fcgi_begin_request_keep_conn, tvb, offset, 1, FALSE);
|
||||
offset += 1;
|
||||
|
||||
offset += 5;
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
static void
|
||||
dissect_abort_request(tvbuff_t *tvb, proto_tree *fcgi_tree, gint offset, guint16 len)
|
||||
{
|
||||
proto_item *ar;
|
||||
proto_tree *ar_tree;
|
||||
|
||||
ar = proto_tree_add_text(fcgi_tree, tvb, offset, len, "Abort Request:");
|
||||
ar_tree = proto_item_add_subtree(ar, ett_fcgi_abort_request);
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
static void
|
||||
dissect_end_request(tvbuff_t *tvb, proto_tree *fcgi_tree, gint offset, guint16 len)
|
||||
{
|
||||
proto_item *er;
|
||||
proto_tree *er_tree;
|
||||
|
||||
er = proto_tree_add_text(fcgi_tree, tvb, offset, len, "End Request:");
|
||||
er_tree = proto_item_add_subtree(er, ett_fcgi_end_request);
|
||||
|
||||
proto_tree_add_item(er_tree, hf_fcgi_end_request_app_status, tvb, offset, 4, FALSE);
|
||||
offset += 4;
|
||||
|
||||
proto_tree_add_item(er_tree, hf_fcgi_end_request_protocol_status, tvb, offset, 1, FALSE);
|
||||
offset += 1;
|
||||
|
||||
offset += 3;
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
static void
|
||||
dissect_params(tvbuff_t *tvb, proto_tree *fcgi_tree, gint offset, guint16 len)
|
||||
{
|
||||
proto_item *p;
|
||||
proto_tree *p_tree;
|
||||
|
||||
p = proto_tree_add_text(fcgi_tree, tvb, offset, len, "Params:");
|
||||
p_tree = proto_item_add_subtree(p, ett_fcgi_params);
|
||||
|
||||
dissect_nv_pairs(tvb, p_tree, offset, len);
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
static void
|
||||
dissect_get_values(tvbuff_t *tvb, proto_tree *fcgi_tree, gint offset, guint16 len)
|
||||
{
|
||||
proto_item *gv;
|
||||
proto_tree *gv_tree;
|
||||
|
||||
gv = proto_tree_add_text(fcgi_tree, tvb, offset, len, "Get Values:");
|
||||
gv_tree = proto_item_add_subtree(gv, ett_fcgi_params);
|
||||
|
||||
dissect_nv_pairs(tvb, gv_tree, offset, len);
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
static void
|
||||
dissect_get_values_result(tvbuff_t *tvb, proto_tree *fcgi_tree, gint offset, guint16 len)
|
||||
{
|
||||
proto_item *gvr;
|
||||
proto_tree *gvr_tree;
|
||||
|
||||
gvr = proto_tree_add_text(fcgi_tree, tvb, offset, len, "Get Values:");
|
||||
gvr_tree = proto_item_add_subtree(gvr, ett_fcgi_params);
|
||||
|
||||
dissect_nv_pairs(tvb, gvr_tree, offset, len);
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
static void
|
||||
dissect_fcgi_record(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
||||
{
|
||||
gint offset = 0;
|
||||
guint8 type;
|
||||
|
||||
type = tvb_get_guint8(tvb, 1);
|
||||
|
||||
/* When there are multiple FCGI records in a TCP frame the following code */
|
||||
/* will append the type for each record to COL_INFO. */
|
||||
/* XXX: Unfortunately, something in the tcp_dissect_pdus() code is broken */
|
||||
/* such that only the type for the first FCGI record appears in the */
|
||||
/* INFO column. (All write attempts to COL_INFO after the first fail */
|
||||
/* because pinfo->cinfo->writable is FALSE). */
|
||||
col_set_str(pinfo->cinfo, COL_PROTOCOL, "FCGI");
|
||||
col_clear(pinfo->cinfo, COL_INFO);
|
||||
col_append_sep_str(pinfo->cinfo, COL_INFO, NULL,
|
||||
val_to_str(type, record_types, "Unknown (%u)"));
|
||||
col_set_fence(pinfo->cinfo, COL_INFO);
|
||||
|
||||
if (tree) { /* we are being asked for details */
|
||||
proto_item *ti;
|
||||
proto_tree *fcgi_tree;
|
||||
guint16 clen;
|
||||
guint8 plen;
|
||||
|
||||
ti = proto_tree_add_item(tree, proto_fcgi, tvb, 0, -1, FALSE);
|
||||
proto_item_append_text(ti, " (%s)",
|
||||
val_to_str(type, record_types, "Unknown (%u)"));
|
||||
fcgi_tree = proto_item_add_subtree(ti, ett_fcgi);
|
||||
|
||||
proto_tree_add_item(fcgi_tree, hf_fcgi_version, tvb, offset, 1, FALSE);
|
||||
offset += 1;
|
||||
|
||||
proto_tree_add_item(fcgi_tree, hf_fcgi_type, tvb, offset, 1, FALSE);
|
||||
offset += 1;
|
||||
|
||||
proto_tree_add_item(fcgi_tree, hf_fcgi_id, tvb, offset, 2, FALSE);
|
||||
offset += 2;
|
||||
|
||||
clen = tvb_get_ntohs(tvb, offset);
|
||||
proto_tree_add_item(fcgi_tree, hf_fcgi_content_length, tvb, offset, 2, FALSE);
|
||||
offset += 2;
|
||||
|
||||
plen = tvb_get_guint8(tvb, offset);
|
||||
proto_tree_add_item(fcgi_tree, hf_fcgi_padding_length, tvb, offset, 1, FALSE);
|
||||
offset += 1;
|
||||
|
||||
offset += 1;
|
||||
|
||||
switch (type)
|
||||
{
|
||||
case FCGI_BEGIN_REQUEST:
|
||||
dissect_begin_request(tvb, fcgi_tree, offset, clen);
|
||||
offset += clen;
|
||||
break;
|
||||
case FCGI_ABORT_REQUEST:
|
||||
dissect_abort_request(tvb, fcgi_tree, offset, clen);
|
||||
offset += clen;
|
||||
break;
|
||||
case FCGI_END_REQUEST:
|
||||
dissect_end_request(tvb, fcgi_tree, offset, clen);
|
||||
offset += clen;
|
||||
break;
|
||||
case FCGI_PARAMS:
|
||||
dissect_params(tvb, fcgi_tree, offset, clen);
|
||||
offset += clen;
|
||||
break;
|
||||
case FCGI_GET_VALUES:
|
||||
dissect_get_values(tvb, fcgi_tree, offset, clen);
|
||||
offset += clen;
|
||||
break;
|
||||
case FCGI_GET_VALUES_RESULT:
|
||||
dissect_get_values_result(tvb, fcgi_tree, offset, clen);
|
||||
offset += clen;
|
||||
break;
|
||||
default:
|
||||
if (clen > 0) {
|
||||
proto_tree_add_item(fcgi_tree, hf_fcgi_content_data, tvb, offset, clen, TRUE);
|
||||
offset += clen;
|
||||
}
|
||||
break;
|
||||
}
|
||||
|
||||
if (plen > 0) {
|
||||
proto_tree_add_item(fcgi_tree, hf_fcgi_padding_data, tvb, offset, plen, TRUE);
|
||||
offset += plen;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static guint
|
||||
get_fcgi_record_len(packet_info *pinfo _U_, tvbuff_t *tvb, int offset)
|
||||
{
|
||||
return 8 + tvb_get_ntohs(tvb, offset + 4) + tvb_get_guint8(tvb, offset + 6);
|
||||
}
|
||||
|
||||
static void
|
||||
dissect_fcgi(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
||||
{
|
||||
tcp_dissect_pdus(tvb, pinfo, tree, TRUE, 8, get_fcgi_record_len, dissect_fcgi_record);
|
||||
}
|
||||
|
||||
void
|
||||
proto_register_fcgi(void)
|
||||
{
|
||||
static hf_register_info hf[] = {
|
||||
{ &hf_fcgi_version,
|
||||
{ "Version", "fcgi.version",
|
||||
FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } },
|
||||
{ &hf_fcgi_type,
|
||||
{ "Type", "fcgi.type",
|
||||
FT_UINT8, BASE_DEC, VALS(record_types), 0x0, NULL, HFILL } },
|
||||
{ &hf_fcgi_id,
|
||||
{ "Request ID", "fcgi.id",
|
||||
FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } },
|
||||
{ &hf_fcgi_content_length,
|
||||
{ "Content Length", "fcgi.content.length",
|
||||
FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } },
|
||||
{ &hf_fcgi_padding_length,
|
||||
{ "Padding Length", "fcgi.padding.length",
|
||||
FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } },
|
||||
{ &hf_fcgi_content_data,
|
||||
{ "Content Data", "fcgi.content.data",
|
||||
FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL } },
|
||||
{ &hf_fcgi_padding_data,
|
||||
{ "Padding Data", "fcgi.padding.data",
|
||||
FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL } },
|
||||
{ &hf_fcgi_begin_request_role,
|
||||
{ "Role", "fcgi.begin_request.role",
|
||||
FT_UINT16, BASE_DEC, VALS(application_roles), 0x0, NULL, HFILL } },
|
||||
{ &hf_fcgi_begin_request_flags,
|
||||
{ "Flags", "fcgi.begin_request.flags",
|
||||
FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL } },
|
||||
{ &hf_fcgi_begin_request_keep_conn,
|
||||
{ "FCGI_KEEP_CONN", "fcgi.begin_request.keep_conn",
|
||||
FT_BOOLEAN, 8, NULL, FCGI_KEEP_CONN, NULL, HFILL } },
|
||||
{ &hf_fcgi_end_request_app_status,
|
||||
{ "Application Status", "fcgi.end_request.app_status",
|
||||
FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } },
|
||||
{ &hf_fcgi_end_request_protocol_status,
|
||||
{ "Protocol Status", "fcgi.end_request.protocol_status",
|
||||
FT_UINT32, BASE_DEC, VALS(protocol_statuses), 0x0, NULL, HFILL } }
|
||||
};
|
||||
static gint *ett[] = {
|
||||
&ett_fcgi,
|
||||
&ett_fcgi_begin_request,
|
||||
&ett_fcgi_abort_request,
|
||||
&ett_fcgi_end_request,
|
||||
&ett_fcgi_params
|
||||
};
|
||||
module_t *fcgi_module;
|
||||
|
||||
proto_fcgi = proto_register_protocol("FastCGI", "FCGI", "fcgi");
|
||||
|
||||
proto_register_field_array(proto_fcgi, hf, array_length(hf));
|
||||
proto_register_subtree_array(ett, array_length(ett));
|
||||
|
||||
fcgi_module = prefs_register_protocol(proto_fcgi, proto_reg_handoff_fcgi);
|
||||
|
||||
prefs_register_uint_preference(fcgi_module,
|
||||
"tcp.port",
|
||||
"TCP port for FCGI",
|
||||
"Set the TCP port for FastCGI traffic",
|
||||
10,
|
||||
&tcp_port);
|
||||
|
||||
register_dissector("fcgi", dissect_fcgi, proto_fcgi);
|
||||
}
|
||||
|
||||
void
|
||||
proto_reg_handoff_fcgi(void)
|
||||
{
|
||||
static gboolean initialized = FALSE;
|
||||
static dissector_handle_t fcgi_handle;
|
||||
static guint saved_tcp_port;
|
||||
|
||||
if (!initialized) {
|
||||
fcgi_handle = create_dissector_handle(dissect_fcgi, proto_fcgi);
|
||||
dissector_add_handle("tcp.port", fcgi_handle); /* for "decode as" */
|
||||
initialized = TRUE;
|
||||
} else if (saved_tcp_port != 0) {
|
||||
dissector_delete("tcp.port", saved_tcp_port, fcgi_handle);
|
||||
}
|
||||
|
||||
if (tcp_port != 0) {
|
||||
dissector_add("tcp.port", tcp_port, fcgi_handle);
|
||||
}
|
||||
|
||||
saved_tcp_port = tcp_port;
|
||||
}
|
Loading…
Reference in New Issue