Migrate context tracing code from packet-h248.[ch] to gcp.[ch], so that the same code can be used by megaco (upcoming).

svn path=/trunk/; revision=21189

1 files changed, 217 insertions, 0 deletions

diff --git a/epan/gcp.h b/epan/gcp.h
new file mode 100644
index 0000000000..74fad77aa0
--- /dev/null
+++ b/epan/gcp.h
@@ -0,0 +1,217 @@
+/* gcp.h
+ * Gateway Control Protocol -- Context Tracking
+ *
+ * $Id$
+ *
+ * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ */
+#ifndef __GCP_H_
+#define __GCP_H_
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <glib.h>
+#include <epan/packet.h>
+#include <epan/conversation.h>
+#include <epan/strutil.h>
+#include <epan/emem.h>
+#include <epan/expert.h>
+#include <epan/prefs.h>
+#include <epan/to_str.h>
+
+#include <stdio.h>
+#include <string.h>
+
+#include <epan/dissectors/packet-ber.h>
+#include <epan/dissectors/packet-q931.h>
+#include <epan/dissectors/packet-mtp3.h>
+#include <epan/dissectors/packet-alcap.h>
+#include <epan/dissectors/packet-isup.h>
+
+#include <epan/sctpppids.h>
+
+typedef struct _gcp_hf_ett_t {
+	struct {
+		int ctx;
+		int ctx_cmd;
+		int ctx_term;
+		int ctx_term_type;
+		int ctx_term_bir;
+		int ctx_term_nsap;
+	} hf;
+	
+	struct {
+		gint ctx;
+		gint ctx_cmds;
+		gint ctx_terms;
+		gint ctx_term;
+	} ett;
+} gcp_hf_ett_t;
+
+#define NULL_CONTEXT 0
+#define CHOOSE_CONTEXT 0xFFFFFFFE
+#define ALL_CONTEXTS 0xFFFFFFFF
+
+
+typedef enum {
+    GCP_CMD_NONE,
+    GCP_CMD_ADD_REQ,
+    GCP_CMD_MOVE_REQ,
+    GCP_CMD_MOD_REQ,
+    GCP_CMD_SUB_REQ,
+    GCP_CMD_AUDITCAP_REQ,
+    GCP_CMD_AUDITVAL_REQ,
+    GCP_CMD_NOTIFY_REQ,
+    GCP_CMD_SVCCHG_REQ,
+    GCP_CMD_TOPOLOGY_REQ,
+    GCP_CMD_CTX_ATTR_AUDIT_REQ,
+    GCP_CMD_ADD_REPLY,
+    GCP_CMD_MOVE_REPLY,
+    GCP_CMD_MOD_REPLY,
+    GCP_CMD_SUB_REPLY,
+    GCP_CMD_AUDITCAP_REPLY,
+    GCP_CMD_AUDITVAL_REPLY,
+    GCP_CMD_NOTIFY_REPLY,
+    GCP_CMD_SVCCHG_REPLY,
+    GCP_CMD_TOPOLOGY_REPLY,
+    GCP_CMD_REPLY
+} gcp_cmd_type_t;
+
+typedef enum {
+    GCP_TRX_NONE,
+    GCP_TRX_REQUEST,
+    GCP_TRX_PENDING,
+    GCP_TRX_REPLY,
+    GCP_TRX_ACK
+} gcp_trx_type_t;
+
+
+typedef struct _gcp_msg_t {
+    guint32 lo_addr;
+    guint32 hi_addr;
+    guint32 framenum;
+    struct _gcp_trx_msg_t* trxs;
+    gboolean commited;
+} gcp_msg_t;
+
+typedef struct _gcp_trx_msg_t {
+    struct _gcp_trx_t* trx;
+    struct _gcp_trx_msg_t* next;
+    struct _gcp_trx_msg_t* last;
+} gcp_trx_msg_t;
+
+typedef struct _gcp_cmd_msg_t {
+    struct _gcp_cmd_t* cmd;
+    struct _gcp_cmd_msg_t* next;
+    struct _gcp_cmd_msg_t* last;
+} gcp_cmd_msg_t;
+
+typedef struct _gcp_trx_t {
+    gcp_msg_t* initial;
+    guint32 id;
+    gcp_trx_type_t type;
+    guint pendings;
+    struct _gcp_cmd_msg_t* cmds;
+    struct _gcp_trx_ctx_t* ctxs;
+    guint error;
+} gcp_trx_t;
+
+#define GCP_TERM_TYPE_UNKNOWN 0
+#define GCP_TERM_TYPE_AAL1 1
+#define GCP_TERM_TYPE_AAL2 2
+#define GCP_TERM_TYPE_AAL1_STRUCT 3
+#define GCP_TERM_TYPE_IP_RTP 4
+#define GCP_TERM_TYPE_TDM 5
+
+typedef enum _gcp_wildcard_t {
+    GCP_WILDCARD_NONE,
+    GCP_WILDCARD_CHOOSE,
+    GCP_WILDCARD_ALL
+} gcp_wildcard_t;
+
+typedef struct _gcp_term_t {
+    gchar* str;
+    
+    guint8* buffer;
+    guint len;
+
+    guint type;
+    gchar* bir;
+    gchar* nsap;
+
+    gcp_msg_t* start;
+    
+} gcp_term_t;
+
+typedef struct _gcp_terms_t {
+    gcp_term_t* term;
+    struct _gcp_terms_t* next;
+    struct _gcp_terms_t* last;
+} gcp_terms_t;
+
+typedef struct _gcp_cmd_t {
+    guint offset;
+	gchar* str;
+    gcp_cmd_type_t type;
+    gcp_terms_t terms;
+    struct _gcp_msg_t* msg;
+    struct _gcp_trx_t* trx;
+    struct _gcp_ctx_t* ctx;
+    guint error;
+} gcp_cmd_t;
+
+
+typedef struct _gcp_ctx_t {
+    gcp_msg_t* initial;
+    guint32 id;
+	struct _gcp_cmd_msg_t* cmds;
+    struct _gcp_ctx_t* prev;
+    gcp_terms_t terms;
+} gcp_ctx_t;
+
+WS_VAR_IMPORT const value_string gcp_cmd_type[];
+WS_VAR_IMPORT const value_string gcp_term_types[];
+
+extern void gcp_init(void);
+extern gcp_msg_t* gcp_msg(packet_info* pinfo, int o, gboolean persistent);
+extern gcp_trx_t* gcp_trx(gcp_msg_t* m ,guint32 t_id , gcp_trx_type_t type, gboolean persistent);
+extern gcp_ctx_t* gcp_ctx(gcp_msg_t* m, gcp_trx_t* t, guint32 c_id, gboolean persistent);
+extern gcp_cmd_t* gcp_cmd(gcp_msg_t* m, gcp_trx_t* t, gcp_ctx_t* c, gcp_cmd_type_t type, guint offset, gboolean persistent);
+extern gcp_term_t* gcp_cmd_add_term(gcp_msg_t* m, gcp_trx_t* tr, gcp_cmd_t* c, gcp_term_t* t, gcp_wildcard_t wildcard, gboolean persistent);
+extern void gcp_analyze_msg(proto_tree* gcp_tree, tvbuff_t* gcp_tvb, gcp_msg_t* m, gcp_hf_ett_t* ids);
+
+extern gchar* gcp_cmd_to_str(gcp_cmd_t* c, gboolean persistent);
+extern gchar* gcp_msg_to_str(gcp_msg_t* m, gboolean persistent);
+
+#define gcp_cmd_set_error(c,e) (c->error = e)
+#define gcp_trx_set_error(t,e) (t->error = e)
+
+#define GCP_ETT_ARR_ELEMS(gi)     &(gi.ett.ctx),&(gi.ett.ctx_cmds),&(gi.ett.ctx_terms),&(gi.ett.ctx_term)
+
+#define GCP_HF_ARR_ELEMS(n,gi) \
+  { &(gi.hf.ctx), { "Context", n ".ctx", FT_UINT32, BASE_HEX, NULL, 0, "", HFILL }}, \
+  { &(gi.hf.ctx_term), { "Termination", n ".ctx.term", FT_STRING, BASE_NONE, NULL, 0, "", HFILL }}, \
+  { &(gi.hf.ctx_term_type), { "Type", n ".ctx.term.type", FT_UINT32, BASE_HEX, VALS(gcp_term_types), 0, "", HFILL }}, \
+  { &(gi.hf.ctx_term_bir), { "BIR", n ".ctx.term.bir", FT_STRING, BASE_HEX, NULL, 0, "", HFILL }}, \
+  { &(gi.hf.ctx_term_nsap), { "NSAP", n ".ctx.term.nsap", FT_STRING, BASE_NONE, NULL, 0, "", HFILL }}, \
+  { &(gi.hf.ctx_cmd), { "Command in Frame", n ".ctx.cmd", FT_FRAMENUM, BASE_DEC, NULL, 0, "", HFILL }}
+
+#endif