fdbb382f1c
ifstat Display the network traffic going through active interfaces
on the system. Idle interfaces will not be displayed until
they receive some traffic.
For each interface being displayed, the current, peak and
total statistics are displayed for incoming and outgoing
traffic. By default, the ifstat display will automatically
scale the units being used so that they are in a human-read-
able format. The scaling units used for the current and peak
traffic columns can be altered by the scale command.
Submitted by: Trent Nelson <trent@arpa.com>
426 lines
10 KiB
C
426 lines
10 KiB
C
/*
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* Copyright (c) 2003, Trent Nelson, <trent@arpa.com>.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTIFSTAT_ERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/sysctl.h>
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#include <sys/time.h>
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#include <sys/queue.h>
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#include <net/if.h>
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#include <net/if_mib.h>
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#include <net/if_types.h> /* For IFT_ETHER */
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <float.h>
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#include <err.h>
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#include "systat.h"
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#include "extern.h"
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#include "mode.h"
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#include "convtbl.h"
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/* Column numbers */
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#define C1 0 /* 0-19 */
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#define C2 20 /* 20-39 */
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#define C3 40 /* 40-59 */
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#define C4 60 /* 60-80 */
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#define C5 80 /* Used for label positioning. */
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static int col0 = 0;
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static int col1 = C1;
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static int col2 = C2;
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static int col3 = C3;
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static int col4 = C4;
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static int col5 = C5;
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SLIST_HEAD(, if_stat) curlist;
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SLIST_HEAD(, if_stat_disp) displist;
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struct if_stat {
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SLIST_ENTRY(if_stat) link;
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char if_name[IF_NAMESIZE];
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struct ifmibdata if_mib;
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struct timeval tv;
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struct timeval tv_lastchanged;
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u_long if_in_curtraffic;
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u_long if_out_curtraffic;
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u_long if_in_traffic_peak;
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u_long if_out_traffic_peak;
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u_int if_row; /* Index into ifmib sysctl */
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u_int if_ypos; /* 0 if not being displayed */
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u_int display;
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};
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extern u_int curscale;
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static void right_align_string(const struct if_stat *);
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static void getifmibdata(const int, struct ifmibdata *);
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static void sort_interface_list(void);
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static u_int getifnum(void);
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#define IFSTAT_ERR(n, s) do { \
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putchar(' '); \
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closeifstat(wnd); \
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err((n), (s)); \
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} while (0)
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#define STARTING_ROW (8)
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#define ROW_SPACING (3)
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#define TOPLINE 5
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#define TOPLABEL \
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" Interface Traffic Peak Total"
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#define CLEAR_LINE(y, x) do { \
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wmove(wnd, y, x); \
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wclrtoeol(wnd); \
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} while (0)
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#define IN_col2 (ifp->if_in_curtraffic)
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#define OUT_col2 (ifp->if_out_curtraffic)
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#define IN_col3 (ifp->if_in_traffic_peak)
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#define OUT_col3 (ifp->if_out_traffic_peak)
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#define IN_col4 (ifp->if_mib.ifmd_data.ifi_ibytes)
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#define OUT_col4 (ifp->if_mib.ifmd_data.ifi_obytes)
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#define EMPTY_COLUMN " "
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#define CLEAR_COLUMN(y, x) mvprintw((y), (x), "%20s", EMPTY_COLUMN);
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#define DOPUTRATE(c, r, d) do { \
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CLEAR_COLUMN(r, c); \
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mvprintw(r, (c), "%10.3f %s%s ", \
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convert(d##_##c, curscale), \
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get_string(d##_##c, curscale), \
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"/s"); \
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} while (0)
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#define DOPUTTOTAL(c, r, d) do { \
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CLEAR_COLUMN((r), (c)); \
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mvprintw((r), (c), "%12.3f %s ", \
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convert(d##_##c, SC_AUTO), \
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get_string(d##_##c, SC_AUTO)); \
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} while (0)
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#define PUTRATE(c, r) do { \
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DOPUTRATE(c, (r), IN); \
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DOPUTRATE(c, (r)+1, OUT); \
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} while (0)
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#define PUTTOTAL(c, r) do { \
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DOPUTTOTAL(c, (r), IN); \
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DOPUTTOTAL(c, (r)+1, OUT); \
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} while (0)
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#define PUTNAME(p) do { \
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mvprintw(p->if_ypos, 0, "%s", p->if_name); \
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mvprintw(p->if_ypos, col2-3, "%s", (const char *)"in"); \
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mvprintw(p->if_ypos+1, col2-3, "%s", (const char *)"out"); \
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} while (0)
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WINDOW *
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openifstat(void)
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{
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return (subwin(stdscr, LINES-1-5, 0, 5, 0));
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}
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void
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closeifstat(WINDOW *w)
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{
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struct if_stat *node = NULL;
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while (!SLIST_EMPTY(&curlist)) {
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node = SLIST_FIRST(&curlist);
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SLIST_REMOVE_HEAD(&curlist, link);
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free(node);
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}
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if (w != NULL) {
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wclear(w);
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wrefresh(w);
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delwin(w);
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}
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return;
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}
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void
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labelifstat(void)
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{
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wmove(wnd, TOPLINE, 0);
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wclrtoeol(wnd);
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mvprintw(TOPLINE, 0, "%s", TOPLABEL);
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return;
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}
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void
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showifstat(void)
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{
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struct if_stat *ifp = NULL;
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SLIST_FOREACH(ifp, &curlist, link) {
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if (ifp->display == 0)
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continue;
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PUTNAME(ifp);
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PUTRATE(col2, ifp->if_ypos);
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PUTRATE(col3, ifp->if_ypos);
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PUTTOTAL(col4, ifp->if_ypos);
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}
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return;
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}
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int
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initifstat(void)
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{
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struct if_stat *p = NULL;
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u_int n = 0, i = 0;
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n = getifnum();
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if (n <= 0)
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return -1;
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SLIST_INIT(&curlist);
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for (i = 0; i < n; i++) {
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p = (struct if_stat *)malloc(sizeof(struct if_stat));
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if (p == NULL)
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IFSTAT_ERR(1, "out of memory");
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memset((void *)p, 0, sizeof(struct if_stat));
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SLIST_INSERT_HEAD(&curlist, p, link);
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p->if_row = i+1;
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getifmibdata(p->if_row, &p->if_mib);
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right_align_string(p);
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/*
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* Initially, we only display interfaces that have
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* received some traffic.
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*/
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if (p->if_mib.ifmd_data.ifi_ibytes != 0)
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p->display = 1;
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}
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sort_interface_list();
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return 1;
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}
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void
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fetchifstat(void)
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{
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struct if_stat *ifp = NULL;
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struct timeval tv, new_tv, old_tv;
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double elapsed = 0.0;
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u_int new_inb, new_outb, old_inb, old_outb = 0;
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u_int error = 0;
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u_int we_need_to_sort_interface_list = 0;
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SLIST_FOREACH(ifp, &curlist, link) {
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/*
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* Grab a copy of the old input/output values before we
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* call getifmibdata().
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*/
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old_inb = ifp->if_mib.ifmd_data.ifi_ibytes;
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old_outb = ifp->if_mib.ifmd_data.ifi_obytes;
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ifp->tv_lastchanged = ifp->if_mib.ifmd_data.ifi_lastchange;
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error = gettimeofday(&new_tv, (struct timezone *)0);
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if (error)
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IFSTAT_ERR(2, "error getting time of day");
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(void)getifmibdata(ifp->if_row, &ifp->if_mib);
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new_inb = ifp->if_mib.ifmd_data.ifi_ibytes;
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new_outb = ifp->if_mib.ifmd_data.ifi_obytes;
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/* Display interface if it's received some traffic. */
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if (new_inb > 0 && old_inb == 0) {
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ifp->display = 1;
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we_need_to_sort_interface_list++;
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}
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/*
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* The rest is pretty trivial. Calculate the new values
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* for our current traffic rates, and while we're there,
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* see if we have new peak rates.
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*/
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old_tv = ifp->tv;
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timersub(&new_tv, &old_tv, &tv);
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elapsed = tv.tv_sec + (tv.tv_usec * 1e-6);
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ifp->if_in_curtraffic = new_inb - old_inb;
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ifp->if_out_curtraffic = new_outb - old_outb;
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/*
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* Rather than divide by the time specified on the comm-
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* and line, we divide by ``elapsed'' as this is likely
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* to be more accurate.
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*/
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ifp->if_in_curtraffic /= elapsed;
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ifp->if_out_curtraffic /= elapsed;
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if (ifp->if_in_curtraffic > ifp->if_in_traffic_peak)
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ifp->if_in_traffic_peak = ifp->if_in_curtraffic;
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if (ifp->if_out_curtraffic > ifp->if_out_traffic_peak)
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ifp->if_out_traffic_peak = ifp->if_out_curtraffic;
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ifp->tv.tv_sec = new_tv.tv_sec;
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ifp->tv.tv_usec = new_tv.tv_usec;
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}
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if (we_need_to_sort_interface_list)
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sort_interface_list();
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return;
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}
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/*
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* We want to right justify our interface names against the first column
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* (first sixteen or so characters), so we need to do some alignment.
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*/
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static void
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right_align_string(const struct if_stat *ifp)
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{
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int str_len = 0, pad_len = 0;
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char *newstr = NULL, *ptr = NULL;
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if (ifp == NULL || ifp->if_mib.ifmd_name == NULL)
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return;
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else {
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/* string length + '\0' */
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str_len = strlen(ifp->if_mib.ifmd_name)+1;
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pad_len = IF_NAMESIZE-(str_len);
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newstr = (char *)ifp->if_name;
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ptr = newstr + pad_len;
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(void)memset((void *)newstr, (int)' ', IF_NAMESIZE);
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(void)strncpy(ptr, (const char *)&ifp->if_mib.ifmd_name,
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str_len);
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}
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return;
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}
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/*
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* This function iterates through our list of interfaces, identifying
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* those that are to be displayed (ifp->display = 1). For each interf-
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* rface that we're displaying, we generate an appropriate position for
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* it on the screen (ifp->if_ypos).
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*
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* This function is called any time a change is made to an interface's
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* ``display'' state.
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*/
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void
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sort_interface_list(void)
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{
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struct if_stat *ifp = NULL;
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u_int y = 0;
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y = STARTING_ROW;
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SLIST_FOREACH(ifp, &curlist, link) {
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if (ifp->display) {
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ifp->if_ypos = y;
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y += ROW_SPACING;
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}
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}
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}
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static
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unsigned int
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getifnum(void)
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{
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int error = 0;
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u_int data = 0;
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size_t datalen = 0;
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static int name[] = { CTL_NET,
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PF_LINK,
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NETLINK_GENERIC,
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IFMIB_SYSTEM,
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IFMIB_IFCOUNT };
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datalen = sizeof(data);
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error = sysctl(name,
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5,
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(void *)&data,
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(size_t *)&datalen,
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(void *)NULL,
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(size_t)0);
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if (error)
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IFSTAT_ERR(1, "sysctl error");
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return data;
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}
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static void
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getifmibdata(int row, struct ifmibdata *data)
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{
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int error = 0;
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size_t datalen = 0;
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static int name[] = { CTL_NET,
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PF_LINK,
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NETLINK_GENERIC,
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IFMIB_IFDATA,
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0,
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IFDATA_GENERAL };
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datalen = sizeof(*data);
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name[4] = row;
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error = sysctl(name,
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6,
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(void *)data,
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(size_t *)&datalen,
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(void *)NULL,
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(size_t)0);
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if (error)
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IFSTAT_ERR(2, "sysctl error getting interface data");
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}
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int
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cmdifstat(const char *cmd, const char *args)
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{
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int retval = 0;
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retval = ifcmd(cmd, args);
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/* ifcmd() returns 1 on success */
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if (retval == 1) {
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showifstat();
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refresh();
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}
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return retval;
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}
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