forked from osmocom/wireshark
298 lines
8.4 KiB
C
298 lines
8.4 KiB
C
/* packet-who.c
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* Routines for who protocol (see man rwhod)
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* Gilbert Ramirez <gram@xiexie.org>
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*
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* $Id: packet-who.c,v 1.2 1999/12/12 06:59:24 gram Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@unicom.net>
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* Copyright 1998 Gerald Combs
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*
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#ifdef HAVE_SYS_TYPES_H
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# include <sys/types.h>
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#endif
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#include <time.h>
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#include <glib.h>
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#include "packet.h"
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/*
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*
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RWHOD(8) UNIX System Manager's Manual RWHOD(8)
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The messages sent and received, are of the form:
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struct outmp {
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0 char out_line[8]; tty name
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8 char out_name[8]; user id
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16 long out_time; time on
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};
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struct whod {
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0 char wd_vers;
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1 char wd_type;
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2 char wd_fill[2];
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4 int wd_sendtime;
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8 int wd_recvtime;
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12 char wd_hostname[32];
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44 int wd_loadav[3];
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56 int wd_boottime;
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60 struct whoent {
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struct outmp we_utmp;
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(20 each) int we_idle;
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} wd_we[1024 / sizeof (struct whoent)];
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};
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Linux 2.0 May 13, 1997 2
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*
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*/
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static int proto_who = -1;
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static int hf_who_vers = -1;
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static int hf_who_type = -1;
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static int hf_who_sendtime = -1;
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static int hf_who_recvtime = -1;
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static int hf_who_hostname = -1;
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static int hf_who_loadav_5 = -1;
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static int hf_who_loadav_10 = -1;
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static int hf_who_loadav_15 = -1;
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static int hf_who_boottime = -1;
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static int hf_who_whoent = -1;
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static int hf_who_tty = -1;
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static int hf_who_uid = -1;
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static int hf_who_timeon = -1;
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static int hf_who_idle = -1;
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static gint ett_who = -1;
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static gint ett_whoent = -1;
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static void dissect_whoent(const u_char *pd, int offset, frame_data *fd, proto_tree *tree);
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void
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dissect_who(const u_char *pd, int offset, frame_data *fd, proto_tree *tree)
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{
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proto_tree *who_tree = NULL;
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proto_item *who_ti = NULL;
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gchar server_name[33];
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double loadav_5 = 0.0, loadav_10 = 0.0, loadav_15 = 0.0;
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/* Summary information */
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if (check_col(fd, COL_PROTOCOL))
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col_add_str(fd, COL_PROTOCOL, "WHO");
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/* Figure out if we have enough bytes in the packet
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* to retrieve the data that we want to put into the summary
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* line: hostname and load average
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*/
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if ( BYTES_ARE_IN_FRAME(offset, 60) ) {
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memcpy(server_name, &pd[offset + 12], 32);
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server_name[32] = '\0';
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loadav_5 = (double) pntohl(&pd[offset+44]) / 100.0;
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loadav_10 = (double) pntohl(&pd[offset+48]) / 100.0;
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loadav_15 = (double) pntohl(&pd[offset+52]) / 100.0;
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/* Summary information */
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if (check_col(fd, COL_INFO))
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col_add_fstr(fd, COL_INFO, "%s: %.02f %.02f %.02f",
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server_name, loadav_5, loadav_10, loadav_15);
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}
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else {
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return;
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}
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if (tree) {
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struct timeval tv;
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tv.tv_usec = 0;
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/* We already know that the packet has enough data to fill in
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* the summary info. Retrieve that data */
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who_ti = proto_tree_add_item(tree, proto_who, offset, END_OF_FRAME, NULL);
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who_tree = proto_item_add_subtree(who_ti, ett_who);
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proto_tree_add_item(who_tree, hf_who_vers, offset, 1, pd[offset]);
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offset += 1;
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proto_tree_add_item(who_tree, hf_who_type, offset, 1, pd[offset]);
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offset += 1;
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/* 2 filler bytes */
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offset += 2;
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tv.tv_sec = pntohl(&pd[offset]);
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proto_tree_add_item(who_tree, hf_who_sendtime, offset, 4, &tv);
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offset += 4;
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tv.tv_sec = pntohl(&pd[offset]);
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proto_tree_add_item(who_tree, hf_who_recvtime, offset, 4, &tv);
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offset += 4;
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proto_tree_add_item(who_tree, hf_who_hostname, offset, 32, server_name);
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offset += 32;
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proto_tree_add_item(who_tree, hf_who_loadav_5, offset, 4, loadav_5);
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offset += 4;
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proto_tree_add_item(who_tree, hf_who_loadav_10, offset, 4, loadav_10);
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offset += 4;
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proto_tree_add_item(who_tree, hf_who_loadav_15, offset, 4, loadav_15);
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offset += 4;
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tv.tv_sec = pntohl(&pd[offset]);
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proto_tree_add_item(who_tree, hf_who_boottime, offset, 4, &tv);
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offset += 4;
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dissect_whoent(pd, offset, fd, who_tree);
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}
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}
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/* The man page says that (1024 / sizeof(struct whoent)) is the maximum number
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* of whoent structures in the packet. */
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#define SIZE_OF_WHOENT 24
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#define MAX_NUM_WHOENTS (1024 / SIZE_OF_WHOENT)
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static void
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dissect_whoent(const u_char *pd, int offset, frame_data *fd, proto_tree *tree)
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{
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proto_tree *whoent_tree = NULL;
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proto_item *whoent_ti = NULL;
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int line_offset = offset;
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gchar out_line[9];
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gchar out_name[9];
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struct timeval tv;
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int whoent_num = 0;
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guint32 idle_secs; /* say that out loud... */
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tv.tv_usec = 0;
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out_line[8] = '\0';
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out_name[8] = '\0';
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while (BYTES_ARE_IN_FRAME(line_offset, SIZE_OF_WHOENT) && whoent_num < MAX_NUM_WHOENTS) {
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memcpy(out_line, &pd[line_offset], 8);
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memcpy(out_name, &pd[line_offset+8], 8);
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whoent_ti = proto_tree_add_item(tree, hf_who_whoent, line_offset, SIZE_OF_WHOENT, NULL);
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whoent_tree = proto_item_add_subtree(whoent_ti, ett_whoent);
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proto_tree_add_item(whoent_tree, hf_who_tty, line_offset, 8, out_line);
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line_offset += 8;
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proto_tree_add_item(whoent_tree, hf_who_uid, line_offset, 8, out_name);
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line_offset += 8;
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tv.tv_sec = pntohl(&pd[line_offset]);
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proto_tree_add_item(whoent_tree, hf_who_timeon, line_offset, 4, &tv);
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line_offset += 4;
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idle_secs = pntohl(&pd[line_offset]);
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proto_tree_add_item_format(whoent_tree, hf_who_idle, line_offset, 4, idle_secs,
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"Idle: %s", time_secs_to_str(idle_secs));
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line_offset += 4;
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whoent_num++;
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}
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}
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void
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proto_register_who(void)
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{
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static hf_register_info hf[] = {
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{ &hf_who_vers,
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{ "Version", "who.vers", FT_UINT8, BASE_DEC, NULL, 0x0,
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"" }},
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{ &hf_who_type,
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{ "Type", "who.type", FT_UINT8, BASE_DEC, NULL, 0x0,
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"" }},
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{ &hf_who_sendtime,
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{ "Send Time", "who.sendtime", FT_ABSOLUTE_TIME, BASE_NONE, NULL, 0x0,
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"" }},
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{ &hf_who_recvtime,
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{ "Receive Time", "who.recvtime", FT_ABSOLUTE_TIME, BASE_NONE, NULL, 0x0,
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"" }},
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{ &hf_who_hostname,
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{ "Hostname", "who.hostname", FT_STRING, BASE_NONE, NULL, 0x0,
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"" }},
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{ &hf_who_loadav_5,
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{ "Load Average Over Past 5 Minutes", "who.loadav_5", FT_DOUBLE, BASE_NONE, NULL, 0x0,
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"" }},
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{ &hf_who_loadav_10,
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{ "Load Average Over Past 10 Minutes", "who.loadav_10", FT_DOUBLE, BASE_NONE, NULL, 0x0,
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"" }},
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{ &hf_who_loadav_15,
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{ "Load Average Over Past 15 Minutes", "who.loadav_15", FT_DOUBLE, BASE_NONE, NULL, 0x0,
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"" }},
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{ &hf_who_boottime,
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{ "Boot Time", "who.boottime", FT_ABSOLUTE_TIME, BASE_NONE, NULL, 0x0,
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"" }},
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{ &hf_who_whoent,
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{ "Who utmp Entry", "who.whoent", FT_NONE, BASE_NONE, NULL, 0x0,
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"" }},
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{ &hf_who_tty,
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{ "TTY Name", "who.tty", FT_STRING, BASE_NONE, NULL, 0x0,
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"" }},
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{ &hf_who_uid,
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{ "User ID", "who.uid", FT_STRING, BASE_NONE, NULL, 0x0,
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"" }},
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{ &hf_who_timeon,
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{ "Time On", "who.timeon", FT_ABSOLUTE_TIME, BASE_NONE, NULL, 0x0,
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"" }},
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{ &hf_who_idle,
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{ "Time Idle", "who.idle", FT_UINT32, BASE_NONE, NULL, 0x0,
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"" }},
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};
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static gint *ett[] = {
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&ett_who,
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&ett_whoent,
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};
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proto_who = proto_register_protocol("Who", "who");
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proto_register_field_array(proto_who, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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}
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