wireshark/plugins/mate/mate_setup.c

/* mate_setup.c
* MATE -- Meta Analysis Tracing Engine
*
* Copyright 2004, Luis E. Garcia Ontanon <luis.ontanon@gmail.com>
*
* $Id$
*
* 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.
*/

#include "mate.h"

/* the current mate_config */
static mate_config* matecfg = NULL;

/* appends the formatted string to the current error log */
static void report_error(const gchar* fmt, ...) {
	static gchar error_buffer[DEBUG_BUFFER_SIZE];

	va_list list;
	
	va_start( list, fmt );
	g_vsnprintf(error_buffer,DEBUG_BUFFER_SIZE,fmt,list);
	va_end( list );
	
	g_string_append(matecfg->config_error,error_buffer);
	g_string_append_c(matecfg->config_error,'\n');
	
}

/* creates a blank pdu config
     is going to be called only by the grammar
	 which will set all those elements that aren't set here */
extern mate_cfg_pdu* new_pducfg(gchar* name) {
	mate_cfg_pdu* cfg = g_malloc(sizeof(mate_cfg_pdu));

	cfg->name = g_strdup(name);
	cfg->last_id = 0;

	cfg->items = g_hash_table_new(g_direct_hash,g_direct_equal);
	cfg->transforms = NULL;

	cfg->hfid = -1;
	
	cfg->hfid_pdu_rel_time = -1;
	cfg->hfid_pdu_time_in_gop = -1;
	
	cfg->my_hfids = g_hash_table_new(g_str_hash,g_str_equal);

	cfg->ett = -1;
	cfg->ett_attr = -1;	

	cfg->criterium = NULL;
	cfg->criterium_match_mode = AVPL_NO_MATCH;
	cfg->criterium_accept_mode = ACCEPT_MODE;
	
	g_ptr_array_add(matecfg->pducfglist,(gpointer) cfg);
	g_hash_table_insert(matecfg->pducfgs,(gpointer) cfg->name,(gpointer) cfg);

	cfg->hfids_attr = g_hash_table_new(g_int_hash,g_int_equal);

	return cfg;
}

extern mate_cfg_gop* new_gopcfg(gchar* name) {
	mate_cfg_gop* cfg = g_malloc(sizeof(mate_cfg_gop));
	
	cfg->name = g_strdup(name);
	cfg->last_id = 0;
	
	cfg->items = g_hash_table_new(g_direct_hash,g_direct_equal);
	cfg->transforms = NULL;
	
	cfg->extra = new_avpl("extra");
	
	cfg->hfid = -1;
	
	cfg->ett = -1;
	cfg->ett_attr = -1;
	cfg->ett_times = -1;
	cfg->ett_children = -1;

	cfg->hfid_start_time = -1;
	cfg->hfid_stop_time = -1;
	cfg->hfid_last_time = -1;

	cfg->hfid_gop_pdu = -1;
	cfg->hfid_gop_num_pdus = -1;

	cfg->my_hfids = g_hash_table_new(g_str_hash,g_str_equal);

	cfg->gop_index = g_hash_table_new(g_str_hash,g_str_equal);
	cfg->gog_index = g_hash_table_new(g_str_hash,g_str_equal);

	g_hash_table_insert(matecfg->gopcfgs,(gpointer) cfg->name, (gpointer) cfg);

	return cfg;
}

extern mate_cfg_gog* new_gogcfg(gchar* name) {
	mate_cfg_gog* cfg = g_malloc(sizeof(mate_cfg_gop));
	
	cfg->name = g_strdup(name);
	cfg->last_id = 0;
	
	cfg->items = g_hash_table_new(g_direct_hash,g_direct_equal);
	cfg->transforms = NULL;
	
	cfg->extra = new_avpl("extra");
	
	cfg->my_hfids = g_hash_table_new(g_str_hash,g_str_equal);
	cfg->hfid = -1;
	
	cfg->ett = -1;
	cfg->ett_attr = -1;
	cfg->ett_times = -1;
	cfg->ett_children = -1;
	cfg->ett_gog_gop = -1;
	
	cfg->hfid_gog_num_of_gops = -1;
	cfg->hfid_gog_gop = -1;
	cfg->hfid_gog_gopstart = -1;
	
	cfg->hfid_start_time = -1;
	cfg->hfid_stop_time = -1;
	cfg->hfid_last_time = -1;
	
	g_hash_table_insert(matecfg->gogcfgs,(gpointer) cfg->name, (gpointer) cfg);

	return cfg;
}

extern gboolean add_hfid(header_field_info*  hfi, gchar* how, GHashTable* where) {
	header_field_info*  first_hfi = NULL;
	gboolean exists = FALSE;
	gchar* as;
	gchar* h;
	int* ip;

	while(hfi) {
		first_hfi = hfi;
		hfi = hfi->same_name_prev;
	}

	hfi = first_hfi;

	while (hfi) {
		exists = TRUE;
		ip = g_malloc(sizeof(int));

		*ip = hfi->id;

		if (( as = g_hash_table_lookup(where,ip) )) {
			g_free(ip);
			if (! g_str_equal(as,how)) {
				report_error("MATE Error: add field to Pdu: attempt to add %s(%i) as %s"
						  " failed: field already added as '%s'",hfi->abbrev,hfi->id,how,as);
				return FALSE;
			}
		} else {
			h = g_strdup(how);
			g_hash_table_insert(where,ip,h);
		}

		hfi = hfi->same_name_next;

	}

	if (! exists) {
		report_error("MATE Error: cannot find field for attribute %s",how);
	}	
	return exists;
}

extern gchar* add_ranges(gchar* range,GPtrArray* range_ptr_arr) {
	gchar**  ranges;
	guint i;
	header_field_info* hfi;
	int* hfidp;

	ranges = g_strsplit(range,"/",0);
	
	if (ranges) {
		for (i=0; ranges[i]; i++) {
			hfi = proto_registrar_get_byname(ranges[i]);
			if (hfi) {
				hfidp = g_malloc(sizeof(int));
				*hfidp = hfi->id;
				g_ptr_array_add(range_ptr_arr,(gpointer)hfidp);
				g_string_append_printf(matecfg->fields_filter, "||%s",ranges[i]);
			} else {
				g_strfreev(ranges);
				return g_strdup_printf("no such proto: '%s'",ranges[i]);;
			}
		}
		
		g_strfreev(ranges);
	}
	
	return NULL;
}

static void new_attr_hfri(gchar* item_name, GHashTable* hfids, gchar* name) {
	int* p_id = g_malloc(sizeof(int));

	hf_register_info hfri;

	memset(&hfri, 0, sizeof hfri);
	hfri.p_id = p_id;
	hfri.hfinfo.name = g_strdup_printf("%s",name);
	hfri.hfinfo.abbrev = g_strdup_printf("mate.%s.%s",item_name,name);
	hfri.hfinfo.type = FT_STRING;
	hfri.hfinfo.display = BASE_NONE;
	hfri.hfinfo.strings = NULL;
	hfri.hfinfo.bitmask = 0;
	hfri.hfinfo.blurb = g_strdup_printf("%s attribute of %s",name,item_name);

	*p_id = -1;
	g_hash_table_insert(hfids,name,p_id);
	g_array_append_val(matecfg->hfrs,hfri);

}

static const gchar* my_protoname(int proto_id) {
	if (proto_id) {
		return proto_registrar_get_abbrev(proto_id);
	} else {
		return "*";
	}
}

static void analyze_pdu_hfids(gpointer k, gpointer v, gpointer p) {
	mate_cfg_pdu* cfg = p;
	new_attr_hfri(cfg->name,cfg->my_hfids,(gchar*) v);

	g_string_append_printf(matecfg->fields_filter,"||%s",my_protoname(*(int*)k));
}

static void analyze_transform_hfrs(gchar* name, GPtrArray* transforms, GHashTable* hfids) {
	guint i;
	void* cookie = NULL;
	AVPL_Transf* t;
	AVP* avp;

	for (i=0; i < transforms->len;i++) {
		for (t = g_ptr_array_index(transforms,i); t; t=t->next ) {
			cookie = NULL;
			while(( avp = get_next_avp(t->replace,&cookie) )) {
				if (! g_hash_table_lookup(hfids,avp->n))  {
					new_attr_hfri(name,hfids,avp->n);
				}
			}
		}
	}
}

static void analyze_pdu_config(mate_cfg_pdu* cfg) {
	hf_register_info hfri = { NULL, {NULL, NULL, FT_STRING, BASE_NONE, NULL, 0, NULL, HFILL}};
	gint* ett;

	hfri.p_id = &(cfg->hfid);
	hfri.hfinfo.name = g_strdup_printf("%s",cfg->name);
	hfri.hfinfo.abbrev = g_strdup_printf("mate.%s",cfg->name);
	hfri.hfinfo.blurb = g_strdup_printf("%s id",cfg->name);
	hfri.hfinfo.type = FT_UINT32;
	hfri.hfinfo.display = BASE_DEC;

	g_array_append_val(matecfg->hfrs,hfri);
	
	hfri.p_id = &(cfg->hfid_pdu_rel_time);
	hfri.hfinfo.name = g_strdup_printf("%s time",cfg->name);
	hfri.hfinfo.abbrev = g_strdup_printf("mate.%s.RelativeTime",cfg->name);
	hfri.hfinfo.type = FT_FLOAT;
	hfri.hfinfo.display = BASE_DEC;
	hfri.hfinfo.blurb = "Seconds passed since the start of capture";
	
	g_array_append_val(matecfg->hfrs,hfri);
	
	hfri.p_id = &(cfg->hfid_pdu_time_in_gop);
	hfri.hfinfo.name = g_strdup_printf("%s time since beginning of Gop",cfg->name);
	hfri.hfinfo.abbrev = g_strdup_printf("mate.%s.TimeInGop",cfg->name);
	hfri.hfinfo.type = FT_FLOAT;
	hfri.hfinfo.display = BASE_DEC;
	hfri.hfinfo.blurb = "Seconds passed since the start of the GOP";
	
	g_array_append_val(matecfg->hfrs,hfri);
	
	g_hash_table_foreach(cfg->hfids_attr,analyze_pdu_hfids,cfg);

	ett = &cfg->ett;
	g_array_append_val(matecfg->ett,ett);

	ett = &cfg->ett_attr;
	g_array_append_val(matecfg->ett,ett);

	analyze_transform_hfrs(cfg->name,cfg->transforms,cfg->my_hfids);
}

static void analyze_gop_config(gpointer k _U_, gpointer v, gpointer p _U_) {
	mate_cfg_gop* cfg = v;
	void* cookie = NULL;
	AVP* avp;
	gint* ett;
	hf_register_info hfri = { NULL, {NULL, NULL, FT_STRING, BASE_NONE, NULL, 0, NULL, HFILL}};

	hfri.p_id = &(cfg->hfid);
	hfri.hfinfo.name = g_strdup_printf("%s",cfg->name);
	hfri.hfinfo.abbrev = g_strdup_printf("mate.%s",cfg->name);
	hfri.hfinfo.blurb = g_strdup_printf("%s id",cfg->name);
	hfri.hfinfo.type = FT_UINT32;
	hfri.hfinfo.display = BASE_DEC;

	g_array_append_val(matecfg->hfrs,hfri);

	hfri.p_id = &(cfg->hfid_start_time);
	hfri.hfinfo.name = g_strdup_printf("%s start time",cfg->name);
	hfri.hfinfo.abbrev = g_strdup_printf("mate.%s.StartTime",cfg->name);
	hfri.hfinfo.type = FT_FLOAT;
	hfri.hfinfo.display = BASE_DEC;
	hfri.hfinfo.blurb = g_strdup_printf("Seconds passed since the beginning of capture to the start of this %s",cfg->name);

	g_array_append_val(matecfg->hfrs,hfri);

	hfri.p_id = &(cfg->hfid_stop_time);
	hfri.hfinfo.name = g_strdup_printf("%s hold time",cfg->name);
	hfri.hfinfo.abbrev = g_strdup_printf("mate.%s.Time",cfg->name);
	hfri.hfinfo.blurb = g_strdup_printf("Duration in seconds from start to stop of this %s",cfg->name);

	g_array_append_val(matecfg->hfrs,hfri);

	hfri.p_id = &(cfg->hfid_last_time);
	hfri.hfinfo.name = g_strdup_printf("%s duration",cfg->name);
	hfri.hfinfo.abbrev = g_strdup_printf("mate.%s.Duration",cfg->name);
	hfri.hfinfo.blurb = g_strdup_printf("Time passed between the start of this %s and the last pdu assigned to it",cfg->name);

	g_array_append_val(matecfg->hfrs,hfri);

	hfri.p_id = &(cfg->hfid_gop_num_pdus);
	hfri.hfinfo.name = g_strdup_printf("%s number of PDUs",cfg->name);
	hfri.hfinfo.abbrev = g_strdup_printf("mate.%s.NumOfPdus",cfg->name);
	hfri.hfinfo.blurb = g_strdup_printf("Number of PDUs assigned to this %s",cfg->name);
	hfri.hfinfo.type = FT_UINT32;

	g_array_append_val(matecfg->hfrs,hfri);

	hfri.p_id = &(cfg->hfid_gop_pdu);
	hfri.hfinfo.name = g_strdup_printf("A PDU of %s",cfg->name);
	hfri.hfinfo.abbrev = g_strdup_printf("mate.%s.Pdu",cfg->name);
	hfri.hfinfo.blurb = g_strdup_printf("A PDU assigned to this %s",cfg->name);

	if (cfg->pdu_tree_mode == GOP_FRAME_TREE) {
		hfri.hfinfo.type = FT_FRAMENUM;
		g_array_append_val(matecfg->hfrs,hfri);
	} else 	if (cfg->pdu_tree_mode == GOP_PDU_TREE) {
		hfri.hfinfo.type = FT_UINT32;
		g_array_append_val(matecfg->hfrs,hfri);
	} else {
		cfg->pdu_tree_mode = GOP_NO_TREE;
	}

	while(( avp = get_next_avp(cfg->key,&cookie) )) {
		if (! g_hash_table_lookup(cfg->my_hfids,avp->n))  {
			new_attr_hfri(cfg->name,cfg->my_hfids,avp->n);
		}
	}

	if(cfg->start) {
		cookie = NULL;
		while(( avp = get_next_avp(cfg->start,&cookie) )) {
			if (! g_hash_table_lookup(cfg->my_hfids,avp->n))  {
				new_attr_hfri(cfg->name,cfg->my_hfids,avp->n);
			}
		}
	}
	
	if (cfg->stop) {
		cookie = NULL;
		while(( avp = get_next_avp(cfg->stop,&cookie) )) {
			if (! g_hash_table_lookup(cfg->my_hfids,avp->n))  {
				new_attr_hfri(cfg->name,cfg->my_hfids,avp->n);
			}
		}
	}
	
	cookie = NULL;
	while(( avp = get_next_avp(cfg->extra,&cookie) )) {
		if (! g_hash_table_lookup(cfg->my_hfids,avp->n))  {
			new_attr_hfri(cfg->name,cfg->my_hfids,avp->n);
		}
	}

	analyze_transform_hfrs(cfg->name,cfg->transforms,cfg->my_hfids);

	ett = &cfg->ett;
	g_array_append_val(matecfg->ett,ett);

	ett = &cfg->ett_attr;
	g_array_append_val(matecfg->ett,ett);

	ett = &cfg->ett_times;
	g_array_append_val(matecfg->ett,ett);

	ett = &cfg->ett_children;
	g_array_append_val(matecfg->ett,ett);

	g_hash_table_insert(matecfg->gops_by_pduname,cfg->name,cfg);
}

static void analyze_gog_config(gpointer k _U_, gpointer v, gpointer p _U_) {
	mate_cfg_gog* cfg = v;
	void* avp_cookie;
	void* avpl_cookie;
	AVP* avp;
	AVPL* avpl;
	AVPL* gopkey_avpl;
	AVPL* key_avps;
	LoAL* gog_keys = NULL;
	hf_register_info hfri = { NULL, {NULL, NULL, FT_STRING, BASE_NONE, NULL, 0, NULL, HFILL}};
	gint* ett;

	/* create the hf array for this gog */
	hfri.p_id = &(cfg->hfid);
	hfri.hfinfo.name = g_strdup_printf("%s",cfg->name);
	hfri.hfinfo.abbrev = g_strdup_printf("mate.%s",cfg->name);
	hfri.hfinfo.blurb = g_strdup_printf("%s Id",cfg->name);
	hfri.hfinfo.type = FT_UINT32;
	hfri.hfinfo.display = BASE_DEC;

	g_array_append_val(matecfg->hfrs,hfri);
	
	hfri.p_id = &(cfg->hfid_gog_num_of_gops);
	hfri.hfinfo.name = "number of GOPs";
	hfri.hfinfo.abbrev = g_strdup_printf("mate.%s.NumOfGops",cfg->name);
	hfri.hfinfo.type = FT_UINT32;
	hfri.hfinfo.display = BASE_DEC;
	hfri.hfinfo.blurb = g_strdup_printf("Number of GOPs assigned to this %s",cfg->name);
	
	g_array_append_val(matecfg->hfrs,hfri);
	
	hfri.p_id = &(cfg->hfid_gog_gopstart);
	hfri.hfinfo.name = "GopStart frame";
	hfri.hfinfo.abbrev = g_strdup_printf("mate.%s.GopStart",cfg->name);
	hfri.hfinfo.type = FT_FRAMENUM;
	hfri.hfinfo.display = BASE_DEC;
	hfri.hfinfo.blurb = g_strdup("The start frame of a GOP");
	
	g_array_append_val(matecfg->hfrs,hfri);
	
	hfri.p_id = &(cfg->hfid_gog_gopstop);
	hfri.hfinfo.name = "GopStop frame";
	hfri.hfinfo.abbrev = g_strdup_printf("mate.%s.GopStop",cfg->name);
	hfri.hfinfo.type = FT_FRAMENUM;
	hfri.hfinfo.display = BASE_DEC;
	hfri.hfinfo.blurb = g_strdup("The stop frame of a GOP");
	
	g_array_append_val(matecfg->hfrs,hfri);
	
	hfri.p_id = &(cfg->hfid_start_time);
	hfri.hfinfo.name = g_strdup_printf("%s start time",cfg->name);
	hfri.hfinfo.abbrev = g_strdup_printf("mate.%s.StartTime",cfg->name);
	hfri.hfinfo.type = FT_FLOAT;
	hfri.hfinfo.blurb = g_strdup_printf("Seconds passed since the beginning of capture to the start of this %s",cfg->name);
	
	g_array_append_val(matecfg->hfrs,hfri);
		
	hfri.p_id = &(cfg->hfid_last_time);
	hfri.hfinfo.name = g_strdup_printf("%s duration",cfg->name);
	hfri.hfinfo.abbrev = g_strdup_printf("mate.%s.Duration",cfg->name);
	hfri.hfinfo.blurb = g_strdup_printf("Time passed between the start of this %s and the last pdu assigned to it",cfg->name);
	
	g_array_append_val(matecfg->hfrs,hfri);
	
	/* this might become mate.gogname.gopname */
	hfri.p_id = &(cfg->hfid_gog_gop);
	hfri.hfinfo.name = "a GOP";
	hfri.hfinfo.abbrev = g_strdup_printf("mate.%s.Gop",cfg->name);
	hfri.hfinfo.type = FT_STRING;
	hfri.hfinfo.display = BASE_DEC;
	hfri.hfinfo.blurb = g_strdup_printf("a GOPs assigned to this %s",cfg->name);

	g_array_append_val(matecfg->hfrs,hfri);

	/*  index the keys of gog for every gop
		and insert the avps of the keys to the hfarray */
	key_avps = new_avpl("");
	
	avpl_cookie = NULL;
	while (( avpl = get_next_avpl(cfg->keys,&avpl_cookie) )) {
		
		if (! ( gog_keys = g_hash_table_lookup(matecfg->gogs_by_gopname,avpl->name))) {
			gog_keys = new_loal(avpl->name);
			g_hash_table_insert(matecfg->gogs_by_gopname,gog_keys->name,gog_keys);
		}
		
		gopkey_avpl = new_avpl_from_avpl(cfg->name, avpl, TRUE);
		loal_append(gog_keys,gopkey_avpl);

		avp_cookie = NULL;
		while (( avp = get_next_avp(avpl,&avp_cookie) )) {
			if (! g_hash_table_lookup(cfg->my_hfids,avp->n))  {
				new_attr_hfri(cfg->name,cfg->my_hfids,avp->n);
				insert_avp(key_avps,avp);
			}
		}
	}

	/* insert the extra avps to the hfarray */
	avp_cookie = NULL;
	while (( avp = get_next_avp(cfg->extra,&avp_cookie) )) {
		if (! g_hash_table_lookup(cfg->my_hfids,avp->n))  {
			new_attr_hfri(cfg->name,cfg->my_hfids,avp->n);
		}
	}
	
	/* every key_avp ios an extra as well.
		one day every Member will have its own extras */
	merge_avpl(cfg->extra,key_avps,TRUE);
	
	
	analyze_transform_hfrs(cfg->name,cfg->transforms,cfg->my_hfids);

	ett = &cfg->ett;
	g_array_append_val(matecfg->ett,ett);

	ett = &cfg->ett_attr;
	g_array_append_val(matecfg->ett,ett);

	ett = &cfg->ett_children;
	g_array_append_val(matecfg->ett,ett);

	ett = &cfg->ett_times;
	g_array_append_val(matecfg->ett,ett);
	
	ett = &cfg->ett_gog_gop;	
	g_array_append_val(matecfg->ett,ett);
	
}

static void analyze_config(void) {
	guint i;

	for (i=0; i < matecfg->pducfglist->len; i++) {
		analyze_pdu_config((mate_cfg_pdu*) g_ptr_array_index(matecfg->pducfglist,i));
	}

	g_hash_table_foreach(matecfg->gopcfgs,analyze_gop_config,matecfg);
	g_hash_table_foreach(matecfg->gogcfgs,analyze_gog_config,matecfg);

}

extern mate_config* mate_cfg() {
	return matecfg;
}

extern mate_config* mate_make_config(const gchar* filename, int mate_hfid) {
	gint* ett;
	avp_init();

	matecfg = g_malloc(sizeof(mate_config));

	matecfg->hfid_mate = mate_hfid;
	
	matecfg->fields_filter = g_string_new("");
	matecfg->protos_filter = g_string_new(""); 
	
	matecfg->dbg_facility = NULL;
	
	matecfg->mate_lib_path = g_strdup_printf("%s%c%s%c",get_datafile_dir(),DIR_SEP,DEFAULT_MATE_LIB_PATH,DIR_SEP);;
	
	matecfg->pducfgs = g_hash_table_new(g_str_hash,g_str_equal);
	matecfg->gopcfgs = g_hash_table_new(g_str_hash,g_str_equal);
	matecfg->gogcfgs = g_hash_table_new(g_str_hash,g_str_equal);
	matecfg->transfs = g_hash_table_new(g_str_hash,g_str_equal);
	
	matecfg->pducfglist = g_ptr_array_new();
	matecfg->gops_by_pduname = g_hash_table_new(g_str_hash,g_str_equal);
	matecfg->gogs_by_gopname = g_hash_table_new(g_str_hash,g_str_equal);
	
	matecfg->ett_root = -1;

	matecfg->hfrs = g_array_new(FALSE,FALSE,sizeof(hf_register_info));
	matecfg->ett  = g_array_new(FALSE,FALSE,sizeof(gint*));
	
	matecfg->defaults.pdu.drop_unassigned = FALSE;
	matecfg->defaults.pdu.discard = FALSE;
	matecfg->defaults.pdu.last_extracted = FALSE;
	matecfg->defaults.pdu.match_mode = AVPL_STRICT;
	matecfg->defaults.pdu.replace_mode = AVPL_INSERT;
	
	matecfg->defaults.gop.expiration = -1.0;
	matecfg->defaults.gop.idle_timeout = -1.0;
	matecfg->defaults.gop.lifetime = -1.0;
	matecfg->defaults.gop.pdu_tree_mode = GOP_FRAME_TREE;
	matecfg->defaults.gop.show_times = TRUE;
	matecfg->defaults.gop.drop_unassigned = FALSE;
	
		/* gop prefs */
	matecfg->defaults.gog.expiration = 5.0;
	matecfg->defaults.gog.gop_tree_mode = GOP_BASIC_TREE;

	/* what to dbgprint */
	matecfg->dbg_lvl = 0;	
	matecfg->dbg_pdu_lvl = 0;
	matecfg->dbg_gop_lvl = 0;
	matecfg->dbg_gog_lvl = 0;
	
	matecfg->config_error = g_string_new("");
	
	ett = &matecfg->ett_root;
	g_array_append_val(matecfg->ett,ett);
	
	if ( mate_load_config(filename,matecfg) ) {
		analyze_config();
	} else {
		report_failure("MATE failed to configue!\n"
					   "It is recommended that you fix your config and restart wireshark.\n"
					   "The reported error is:\n%s\n",matecfg->config_error->str);
		
		/* if (matecfg) destroy_mate_config(matecfg,FALSE); */
		matecfg = NULL;
		return NULL;
	}

	if (matecfg->fields_filter->len > 1) {
		g_string_erase(matecfg->fields_filter,0,2);
		g_string_erase(matecfg->protos_filter,0,2);
	} else {
		/*destroy_mate_config(matecfg,FALSE);*/
		matecfg = NULL;
		return NULL;
	}

	matecfg->tap_filter = g_strdup_printf("(%s) && (%s)",matecfg->protos_filter->str,matecfg->fields_filter->str);

	return matecfg;
}