tap-protocolinfo.c

   1 /* tap-protocolinfo.c
   2  * protohierstat   2002 Ronnie Sahlberg
   3  *
   4  * $Id: tap-protocolinfo.c,v 1.4 2003/05/03 00:48:33 guy Exp $
   5  *
   6  * Ethereal - Network traffic analyzer
   7  * By Gerald Combs <gerald@ethereal.com>
   8  * Copyright 1998 Gerald Combs
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License
  12  * as published by the Free Software Foundation; either version 2
  13  * of the License, or (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  23  */
  24
  25 /* This module provides Protocol Column Info tap for tethereal */
  26
  27 #ifdef HAVE_CONFIG_H
  28 # include "config.h"
  29 #endif
  30
  31 #include <stdio.h>
  32
  33 #ifdef HAVE_SYS_TYPES_H
  34 # include <sys/types.h>
  35 #endif
  36
  37 #include <string.h>
  38 #include "epan/epan_dissect.h"
  39 #include "epan/column-utils.h"
  40 #include "epan/proto.h"
  41 #include "tap.h"
  42 #include "register.h"
  43
  44 typedef struct _pci_t {
  45         char *filter;
  46         int hf_index;
  47 } pci_t;
  48
  49
  50 static int
  51 protocolinfo_packet(void *prs, packet_info *pinfo, epan_dissect_t *edt, void *dummy _U_)
  52 {
  53         pci_t *rs=prs;
  54         GPtrArray *gp;
  55         guint i;
  56         char *str;
  57
  58         gp=proto_get_finfo_ptr_array(edt->tree, rs->hf_index);
  59         if(!gp){
  60                 return 0;
  61         }
  62
  63         for(i=0;i<gp->len;i++){
  64                 str=proto_construct_dfilter_string(gp->pdata[i], NULL);
  65                 if(str){
  66                         col_append_fstr(pinfo->cinfo, COL_INFO, "  %s",str);
  67                         g_free(str);
  68                 }
  69         }
  70         return 0;
  71 }
  72
  73
  74
  75 static void
  76 protocolinfo_init(char *optarg)
  77 {
  78         pci_t *rs;
  79         char *field=NULL;
  80         char *filter=NULL;
  81         header_field_info *hfi;
  82         GString *error_string;
  83
  84         if(!strncmp("proto,colinfo,",optarg,14)){
  85                 filter=optarg+14;
  86                 field=strchr(filter,',');
  87                 if(field){
  88                         field+=1;  /* skip the ',' */
  89                 }
  90         }
  91         if(!field){
  92                 fprintf(stderr, "tethereal: invalid \"-z proto,colinfo,<filter>,<field>\" argument\n");
  93                 exit(1);
  94         }
  95
  96         hfi=proto_registrar_get_byname(field);
  97         if(!hfi){
  98                 fprintf(stderr, "tethereal: Field \"%s\" does not exist.\n", field);
  99                 exit(1);
 100         }
 101
 102         rs=g_malloc(sizeof(pci_t));
 103         rs->hf_index=hfi->id;
 104         if((field-filter)>1){
 105                 rs->filter=g_malloc(field-filter);
 106                 strncpy(rs->filter,filter,(field-filter)-1);
 107                 rs->filter[(field-filter)-1]=0;
 108         } else {
 109                 rs->filter=NULL;
 110         }
 111
 112         error_string=register_tap_listener("frame", rs, rs->filter, NULL, protocolinfo_packet, NULL);
 113         if(error_string){
 114                 /* error, we failed to attach to the tap. complain and clean up */
 115                 fprintf(stderr, "tethereal: Couldn't register proto,colinfo tap: %s\n",
 116                     error_string->str);
 117                 g_string_free(error_string, TRUE);
 118                 if(rs->filter){
 119                         g_free(rs->filter);
 120                 }
 121                 g_free(rs);
 122
 123                 exit(1);
 124         }
 125 }
 126
 127
 128 void
 129 register_tap_listener_protocolinfo(void)
 130 {
 131         register_ethereal_tap("proto,colinfo,", protocolinfo_init);
 132 }
 133