/wireshark-1.8.0/epan/dissectors/packet-distcc.c
C | 419 lines | 274 code | 99 blank | 46 comment | 35 complexity | 31489b0b1cdd4595bc31def4e1c3545b MD5 | raw file
Possible License(s): GPL-2.0, BSD-3-Clause
- /* packet-distcc.c
- * Routines for distcc dissection
- * Copyright 2003, Brad Hards <bradh@frogmouth.net>
- * Copyright 2003, Ronnie Sahlberg, added TCP desegmentation.
- *
- * $Id: packet-distcc.c 42271 2012-04-26 16:47:37Z wmeier $
- *
- * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- */
- /* This dissector supports version 1 of the DISTCC protocol */
- #ifdef HAVE_CONFIG_H
- # include "config.h"
- #endif
- #include <stdio.h>
- #include <string.h>
- #include <time.h>
- #include <glib.h>
- #include <epan/packet.h>
- #include <epan/strutil.h>
- #include <epan/prefs.h>
- static int proto_distcc = -1;
- static int hf_distcc_version = -1;
- static int hf_distcc_argc = -1;
- static int hf_distcc_argv = -1;
- static int hf_distcc_doti_source = -1;
- static int hf_distcc_stat = -1;
- static int hf_distcc_serr = -1;
- static int hf_distcc_sout = -1;
- static int hf_distcc_doto_object = -1;
- static gint ett_distcc = -1;
- static dissector_handle_t data_handle;
- static gboolean distcc_desegment = TRUE;
- #define TCP_PORT_DISTCC 3632
- static guint glb_distcc_tcp_port = TCP_PORT_DISTCC;
- extern void proto_reg_handoff_distcc(void);
- #define CHECK_PDU_LEN(x) \
- if(parameter>tvb_length_remaining(tvb, offset) || parameter < 1){\
- len=tvb_length_remaining(tvb, offset);\
- col_append_str(pinfo->cinfo, COL_INFO, "[Short" x " PDU]");\
- } \
- tvb_ensure_bytes_exist(tvb, offset, len);
- #define DESEGMENT_TCP(x) \
- if(distcc_desegment && pinfo->can_desegment){\
- /* only attempt reassembly if whe have the full segment */\
- if(tvb_length_remaining(tvb, offset)==tvb_reported_length_remaining(tvb, offset)){\
- if(parameter>tvb_length_remaining(tvb, offset)){\
- proto_tree_add_text(tree, tvb, offset-12, -1, "[Short " x " PDU]");\
- pinfo->desegment_offset=offset-12;\
- pinfo->desegment_len=parameter-tvb_length_remaining(tvb, offset);\
- return offset+len;\
- }\
- }\
- }
- static int
- dissect_distcc_dist(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int offset, guint32 parameter)
- {
- proto_tree_add_uint_format(tree, hf_distcc_version, tvb, offset-12, 12, parameter, "DIST: %d", parameter);
- col_append_fstr(pinfo->cinfo, COL_INFO, "DIST:%d ", parameter);
- return offset;
- }
- static int
- dissect_distcc_done(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int offset, guint32 parameter)
- {
- proto_tree_add_uint_format(tree, hf_distcc_version, tvb, offset-12, 12, parameter, "DONE: %d", parameter);
- col_append_fstr(pinfo->cinfo, COL_INFO, "DONE:%d ", parameter);
- return offset;
- }
- static int
- dissect_distcc_stat(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int offset, guint32 parameter)
- {
- proto_tree_add_uint_format(tree, hf_distcc_stat, tvb, offset-12, 12, parameter, "STAT: %d", parameter);
- col_append_fstr(pinfo->cinfo, COL_INFO, "STAT:%d ", parameter);
- return offset;
- }
- static int
- dissect_distcc_argc(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, int offset, guint32 parameter)
- {
- proto_tree_add_uint_format(tree, hf_distcc_argc, tvb, offset-12, 12, parameter, "ARGC: %d", parameter);
- col_append_fstr(pinfo->cinfo, COL_INFO, "ARGC:%d ", parameter);
- return offset;
- }
- static int
- dissect_distcc_argv(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, int offset, gint parameter)
- {
- char argv[256];
- int argv_len;
- gint len=parameter;
- CHECK_PDU_LEN("ARGV");
- /* see if we need to desegment the PDU */
- DESEGMENT_TCP("ARGV");
- argv_len=len>255?255:len;
- tvb_memcpy(tvb, argv, offset, argv_len);
- argv[argv_len]=0;
- proto_tree_add_item(tree, hf_distcc_argv, tvb, offset, len, ENC_ASCII|ENC_NA);
- col_append_fstr(pinfo->cinfo, COL_INFO, "%s ", argv);
- if(len!=parameter){
- proto_tree_add_text(tree, tvb, 0, 0, "[Short ARGV PDU]");
- }
- return offset+len;
- }
- static int
- dissect_distcc_serr(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, int offset, gint parameter)
- {
- char argv[256];
- int argv_len;
- gint len=parameter;
- CHECK_PDU_LEN("SERR");
- /* see if we need to desegment the PDU */
- DESEGMENT_TCP("SERR");
- argv_len=len>255?255:len;
- tvb_memcpy(tvb, argv, offset, argv_len);
- argv[argv_len]=0;
- proto_tree_add_item(tree, hf_distcc_serr, tvb, offset, len, ENC_ASCII|ENC_NA);
- col_append_fstr(pinfo->cinfo, COL_INFO, "SERR:%s ", argv);
- if(len!=parameter){
- proto_tree_add_text(tree, tvb, 0, 0, "[Short SERR PDU]");
- }
- return offset+len;
- }
- static int
- dissect_distcc_sout(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, int offset, gint parameter)
- {
- char argv[256];
- int argv_len;
- gint len=parameter;
- CHECK_PDU_LEN("SOUT");
- /* see if we need to desegment the PDU */
- DESEGMENT_TCP("SOUT");
- argv_len=len>255?255:len;
- tvb_memcpy(tvb, argv, offset, argv_len);
- argv[argv_len]=0;
- proto_tree_add_item(tree, hf_distcc_sout, tvb, offset, len, ENC_ASCII|ENC_NA);
- col_append_fstr(pinfo->cinfo, COL_INFO, "SOUT:%s ", argv);
- if(len!=parameter){
- proto_tree_add_text(tree, tvb, 0, 0, "[Short SOUT PDU]");
- }
- return offset+len;
- }
- static int
- dissect_distcc_doti(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int offset, gint parameter)
- {
- gint len=parameter;
- CHECK_PDU_LEN("DOTI");
- /* see if we need to desegment the PDU */
- DESEGMENT_TCP("DOTI");
- col_append_str(pinfo->cinfo, COL_INFO, "DOTI source ");
- proto_tree_add_item(tree, hf_distcc_doti_source, tvb, offset, len, ENC_ASCII|ENC_NA);
- if(len!=parameter){
- proto_tree_add_text(tree, tvb, 0, 0, "[Short DOTI PDU]");
- }
- return offset+len;
- }
- static int
- dissect_distcc_doto(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int offset, gint parameter)
- {
- gint len=parameter;
- CHECK_PDU_LEN("DOTO");
- /* see if we need to desegment the PDU */
- DESEGMENT_TCP("DOTO");
- col_append_str(pinfo->cinfo, COL_INFO, "DOTO object ");
- proto_tree_add_item(tree, hf_distcc_doto_object, tvb, offset, len, ENC_NA);
- if(len!=parameter){
- proto_tree_add_text(tree, tvb, 0, 0, "[Short DOTO PDU]");
- }
- return offset+len;
- }
- /* Packet dissection routine called by tcp (& udp) when port 3632 detected */
- static void
- dissect_distcc(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree)
- {
- int offset=0;
- proto_tree *tree=NULL;
- proto_item *item=NULL;
- char token[4];
- guint32 parameter;
- col_set_str(pinfo->cinfo, COL_PROTOCOL, "DISTCC ");
- col_clear(pinfo->cinfo, COL_INFO);
- if (parent_tree) {
- item = proto_tree_add_item(parent_tree, proto_distcc, tvb, offset,
- -1, ENC_NA);
- tree = proto_item_add_subtree(item, ett_distcc);
- }
- while(1){
- /* we must have at least 12 bytes so we can read the
- token and the parameter */
- if(tvb_length_remaining(tvb, offset)<12){
- return;
- }
- /* read the token */
- tvb_memcpy(tvb, token, offset, 4);
- offset+=4;
- /* read the parameter */
- if (sscanf(tvb_get_ptr(tvb, offset, 8), "%08x", ¶meter) != 1)
- return;
- offset+=8;
- if(!strncmp(token, "DIST", 4)){
- offset=dissect_distcc_dist(tvb, pinfo, tree, offset, parameter);
- } else if(!strncmp(token, "ARGC", 4)){
- offset=dissect_distcc_argc(tvb, pinfo, tree, offset, parameter);
- } else if(!strncmp(token, "ARGV", 4)){
- offset=dissect_distcc_argv(tvb, pinfo, tree, offset, parameter);
- } else if(!strncmp(token, "DOTI", 4)){
- offset=dissect_distcc_doti(tvb, pinfo, tree, offset, parameter);
- } else if(!strncmp(token, "DONE", 4)){
- offset=dissect_distcc_done(tvb, pinfo, tree, offset, parameter);
- } else if(!strncmp(token, "STAT", 4)){
- offset=dissect_distcc_stat(tvb, pinfo, tree, offset, parameter);
- } else if(!strncmp(token, "SERR", 4)){
- offset=dissect_distcc_serr(tvb, pinfo, tree, offset, parameter);
- } else if(!strncmp(token, "SOUT", 4)){
- offset=dissect_distcc_sout(tvb, pinfo, tree, offset, parameter);
- } else if(!strncmp(token, "DOTO", 4)){
- offset=dissect_distcc_doto(tvb, pinfo, tree, offset, parameter);
- } else {
- call_dissector(data_handle, tvb, pinfo, tree);
- return;
- }
- }
- }
- /* Register protocol with Wireshark. */
- void
- proto_register_distcc(void)
- {
- static hf_register_info hf[] = {
- {&hf_distcc_version,
- {"DISTCC Version", "distcc.version",
- FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }
- },
- {&hf_distcc_argc,
- {"ARGC", "distcc.argc",
- FT_UINT32, BASE_DEC, NULL, 0x0, "Number of arguments", HFILL }
- },
- {&hf_distcc_argv,
- {"ARGV", "distcc.argv",
- FT_STRING, BASE_NONE, NULL, 0x0, "ARGV argument", HFILL }
- },
- {&hf_distcc_doti_source,
- {"Source", "distcc.doti_source",
- FT_STRING, BASE_NONE, NULL, 0x0, "DOTI Preprocessed Source File (.i)", HFILL }
- },
- {&hf_distcc_stat,
- {"Status", "distcc.status",
- FT_UINT32, BASE_DEC, NULL, 0x0, "Unix wait status for command completion", HFILL }
- },
- {&hf_distcc_serr,
- {"SERR", "distcc.serr",
- FT_STRING, BASE_NONE, NULL, 0x0, "STDERR output", HFILL }
- },
- {&hf_distcc_sout,
- {"SOUT", "distcc.sout",
- FT_STRING, BASE_NONE, NULL, 0x0, "STDOUT output", HFILL }
- },
- {&hf_distcc_doto_object,
- {"Object", "distcc.doto_object",
- FT_BYTES, BASE_NONE, NULL, 0x0, "DOTO Compiled object file (.o)", HFILL }
- }
- };
- static gint *ett[] = {
- &ett_distcc,
- };
- module_t *distcc_module;
- proto_distcc = proto_register_protocol("Distcc Distributed Compiler",
- "DISTCC", "distcc");
- proto_register_field_array(proto_distcc, hf, array_length(hf));
- proto_register_subtree_array(ett, array_length(ett));
- distcc_module = prefs_register_protocol(proto_distcc,
- proto_reg_handoff_distcc);
- prefs_register_uint_preference(distcc_module, "tcp.port",
- "DISTCC TCP Port",
- "Set the TCP port for DISTCC messages",
- 10,
- &glb_distcc_tcp_port);
- prefs_register_bool_preference(distcc_module, "desegment_distcc_over_tcp",
- "Reassemble DISTCC-over-TCP messages\nspanning multiple TCP segments",
- "Whether the DISTCC dissector should reassemble messages spanning multiple TCP segments."
- " To use this option, you must also enable \"Allow subdissectors to reassemble TCP streams\" in the TCP protocol settings.",
- &distcc_desegment);
- }
- void
- proto_reg_handoff_distcc(void)
- {
- static gboolean registered_dissector = FALSE;
- static int distcc_tcp_port;
- static dissector_handle_t distcc_handle;
- if (!registered_dissector) {
- /*
- * We haven't registered the dissector yet; get a handle
- * for it.
- */
- distcc_handle = create_dissector_handle(dissect_distcc,
- proto_distcc);
- data_handle = find_dissector("data");
- registered_dissector = TRUE;
- } else {
- /*
- * We've registered the dissector with a TCP port number
- * of "distcc_tcp_port"; we might be changing the TCP port
- * number, so remove that registration.
- */
- dissector_delete_uint("tcp.port", distcc_tcp_port, distcc_handle);
- }
- distcc_tcp_port = glb_distcc_tcp_port;
- dissector_add_uint("tcp.port", distcc_tcp_port, distcc_handle);
- }