3f4eb439e2
more carefully inspecting the return value from sysctl(3). [1] - Use calloc instead of malloc+memset of zero. Submitted by: Alexander Chernikov <admin su29 net> [1] PR: bin/119581 MFC after: 2 weeks
406 lines
9.8 KiB
C
406 lines
9.8 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 <net/if.h>
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#include <net/if_mib.h>
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#include <stdlib.h>
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#include <string.h>
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#include <err.h>
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#include <errno.h>
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#include "systat.h"
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#include "extern.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 const int col0 = 0;
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static const int col1 = C1;
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static const int col2 = C2;
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static const int col3 = C3;
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static const int col4 = C4;
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static const 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(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 TOPLINE 3
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#define TOPLABEL \
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" Interface Traffic Peak Total"
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#define STARTING_ROW (TOPLINE + 1)
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#define ROW_SPACING (3)
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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-3-1, 0, MAINWIN_ROW, 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 *)calloc(1, 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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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 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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if (gettimeofday(&new_tv, (struct timezone *)0) != 0)
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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(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 = 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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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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if (sysctl(name, 5, (void *)&data, (size_t *)&datalen, (void *)NULL,
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(size_t)0) != 0)
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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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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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if ((sysctl(name, 6, (void *)data, (size_t *)&datalen, (void *)NULL,
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(size_t)0) != 0) && (errno != ENOENT))
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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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