Hi,
The following is my packet-dspmsg.c. I created this file according
to packet-frame.c. The code is not completed for dissector, but it should
works for protocol registration.
After creating packet-dspmsg.c and packet-dspmsg.h under \epan\dissectors
folder,
I added name of packet-dspmsg.c and packet-dspmsg.h in Makefile.common.
After compilation,I can see proto_register_dspmsg(void) in
register_all_protocols(void) in register.c (see register.c below)
but when I debug proto_register_dspmsg() with Visual C++ compiler, the code
never enter proto_register_dspmsg()?
In register.c file, Visual C++ calls proto_register_dsi(), then skip
proto_register_dspmsg (), then call proto_register_dtp ().
Could you tell if I missed some steps and how to fix this problem?
Thanks a lot for help.
David.
The following are register.c,packet-dspmsg.c and packet-dspmsg.h file
----------------------------- Cut Here --------------------
// register.c
void register_all_protocols(void) {
.....
{extern void proto_register_dsi (void); proto_register_dsi ();}
{extern void proto_register_dspmsg (void); proto_register_dspmsg ();}
{extern void proto_register_dtp (void); proto_register_dtp ();}
.....
}
----------------------------- Cut Here --------------------
//packet-dspmsg.c
//Routines for dspmsg packet disassembly
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <glib.h>
#include <epan/packet.h>
#include <epan/prefs.h>
#include "etypes.h"
#include <epan/addr_resolv.h>
#include "packet-dspmsg.h"
#include "packet-ieee8023.h"
#include "packet-ipx.h"
#include "packet-isl.h"
#include "packet-llc.h"
#include <epan/crc32.h>
#include <epan/tap.h>
/* protocols and header fields */
static int proto_dspmsg = -1;
static int hf_dspmsg_len = -1;
static int hf_dspmsg_num_record = -1;
static int hf_dspmsg_records = -1;
static gint ett_dspmsg2 = -1;
static int dspmsg_tap = -1;
static heur_dissector_list_t heur_subdissector_list;
static void
dissect_dspmsg(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree,
int fcs_len)
{
int test = 5; // add something later here
return;
}
void
proto_register_dspmsg(void)
{
static hf_register_info hf[] = {
{ &hf_dspmsg_len,
{ "dspmsg_len", "dspmsg.len", FT_UINT16, BASE_DEC, NULL, 0x0,
"Source Hardware Address", HFILL }},
{ &hf_dspmsg_num_record,
{ "record_number", "dspmsg.record_number", FT_UINT16, BASE_DEC, NULL,
0x0,
"", HFILL }},
/* registered here but handled in ethertype.c */
{ &hf_dspmsg_records,
{ "records", "dspmsg.records", FT_UINT16, BASE_HEX, VALS(etype_vals),
0x0,
"", HFILL }},
};
static gint *ett[] = {
&ett_dspmsg2,
};
module_t *dspmsg_module;
proto_dspmsg = proto_register_protocol("dspmsg", "dspmsg", "dspmsg");
proto_register_field_array(proto_dspmsg, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
/* subdissector code */
register_heur_dissector_list("dspmsg", &heur_subdissector_list);
/* Register configuration preferences */
dspmsg_module = prefs_register_protocol(proto_dspmsg, NULL);
register_dissector("dspmsg", dissect_dspmsg, proto_dspmsg);
dspmsg_tap = register_tap("dspmsg");
}
void
proto_reg_handoff_dspmsg(void)
{
dissector_handle_t dspmsg_handle;
dspmsg_handle = create_dissector_handle(dissect_dspmsg,
proto_dspmsg);
dissector_add("wtap_encap", WTAP_ENCAP_DSPMSG, dspmsg_handle);
}
----------------------------------- Cut Here -----------------
// packet-dspmsg.h
#ifndef __PACKET_DSPMSG_H__
#define __PACKET_DSPMSG_H__
typedef struct _dspmsg_hdr {
guint8 dsp_id;
guint16 msg_len;
guint8 record_num;
} dspmsg_hdr;
#endif
----------------------------End---------------------------------
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