2 * protohierstat 2002 Ronnie Sahlberg
6 * Ethereal - Network traffic analyzer
7 * By Gerald Combs <gerald@ethereal.com>
8 * Copyright 1998 Gerald Combs
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.
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.
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.
25 /* This module provides Protocol Column Info tap for tethereal */
33 #ifdef HAVE_SYS_TYPES_H
34 # include <sys/types.h>
38 #include "epan/epan_dissect.h"
39 #include "epan/column-utils.h"
40 #include "epan/proto.h"
44 typedef struct _pci_t {
51 protocolinfo_packet(void *prs, packet_info *pinfo, epan_dissect_t *edt, const void *dummy _U_)
59 * XXX - there needs to be a way for "protocolinfo_init()" to
60 * find out whether the columns are being generated and, if not,
61 * to report an error and exit, as the whole point of this tap
62 * is to modify the columns, and if the columns aren't being
63 * displayed, that makes this tap somewhat pointless.
65 * To prevent a crash, we check whether pinfo->cinfo is null
66 * and, if so, we report that error and exit.
68 if (pinfo->cinfo == NULL) {
69 fprintf(stderr, "tethereal: the proto,colinfo tap doesn't work if the columns aren't being printed.\n");
72 gp=proto_get_finfo_ptr_array(edt->tree, rs->hf_index);
77 for(i=0;i<gp->len;i++){
78 str=proto_construct_dfilter_string(gp->pdata[i], NULL);
80 col_append_fstr(pinfo->cinfo, COL_INFO, " %s",str);
90 protocolinfo_init(char *optarg)
95 header_field_info *hfi;
96 GString *error_string;
98 if(!strncmp("proto,colinfo,",optarg,14)){
100 field=strchr(filter,',');
102 field+=1; /* skip the ',' */
106 fprintf(stderr, "tethereal: invalid \"-z proto,colinfo,<filter>,<field>\" argument\n");
110 hfi=proto_registrar_get_byname(field);
112 fprintf(stderr, "tethereal: Field \"%s\" doesn't exist.\n", field);
116 rs=g_malloc(sizeof(pci_t));
117 rs->hf_index=hfi->id;
118 if((field-filter)>1){
119 rs->filter=g_malloc(field-filter);
120 strncpy(rs->filter,filter,(field-filter)-1);
121 rs->filter[(field-filter)-1]=0;
126 error_string=register_tap_listener("frame", rs, rs->filter, NULL, protocolinfo_packet, NULL);
128 /* error, we failed to attach to the tap. complain and clean up */
129 fprintf(stderr, "tethereal: Couldn't register proto,colinfo tap: %s\n",
131 g_string_free(error_string, TRUE);
143 register_tap_listener_protocolinfo(void)
145 register_tap_listener_cmd_arg("proto,colinfo,", protocolinfo_init);