freebsd-nq/usr.bin/netstat/if.c
Warner Losh fbbd9655e5 Renumber copyright clause 4
Renumber cluase 4 to 3, per what everybody else did when BSD granted
them permission to remove clause 3. My insistance on keeping the same
numbering for legal reasons is too pedantic, so give up on that point.

Submitted by:	Jan Schaumann <jschauma@stevens.edu>
Pull Request:	https://github.com/freebsd/freebsd/pull/96
2017-02-28 23:42:47 +00:00

656 lines
18 KiB
C

/*-
* Copyright (c) 2013 Gleb Smirnoff <glebius@FreeBSD.org>
* Copyright (c) 1983, 1988, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if 0
#ifndef lint
static char sccsid[] = "@(#)if.c 8.3 (Berkeley) 4/28/95";
#endif /* not lint */
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/time.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_types.h>
#include <net/ethernet.h>
#include <netinet/in.h>
#include <netinet/in_var.h>
#include <arpa/inet.h>
#ifdef PF
#include <net/pfvar.h>
#include <net/if_pfsync.h>
#endif
#include <err.h>
#include <errno.h>
#include <ifaddrs.h>
#include <libutil.h>
#ifdef INET6
#include <netdb.h>
#endif
#include <signal.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <unistd.h>
#include <libxo/xo.h>
#include "netstat.h"
static void sidewaysintpr(void);
#ifdef PF
static const char* pfsyncacts[] = {
/* PFSYNC_ACT_CLR */ "clear all request",
/* PFSYNC_ACT_INS */ "state insert",
/* PFSYNC_ACT_INS_ACK */ "state inserted ack",
/* PFSYNC_ACT_UPD */ "state update",
/* PFSYNC_ACT_UPD_C */ "compressed state update",
/* PFSYNC_ACT_UPD_REQ */ "uncompressed state request",
/* PFSYNC_ACT_DEL */ "state delete",
/* PFSYNC_ACT_DEL_C */ "compressed state delete",
/* PFSYNC_ACT_INS_F */ "fragment insert",
/* PFSYNC_ACT_DEL_F */ "fragment delete",
/* PFSYNC_ACT_BUS */ "bulk update mark",
/* PFSYNC_ACT_TDB */ "TDB replay counter update",
/* PFSYNC_ACT_EOF */ "end of frame mark",
};
static const char* pfsyncacts_name[] = {
/* PFSYNC_ACT_CLR */ "clear-all-request",
/* PFSYNC_ACT_INS */ "state-insert",
/* PFSYNC_ACT_INS_ACK */ "state-inserted-ack",
/* PFSYNC_ACT_UPD */ "state-update",
/* PFSYNC_ACT_UPD_C */ "compressed-state-update",
/* PFSYNC_ACT_UPD_REQ */ "uncompressed-state-request",
/* PFSYNC_ACT_DEL */ "state-delete",
/* PFSYNC_ACT_DEL_C */ "compressed-state-delete",
/* PFSYNC_ACT_INS_F */ "fragment-insert",
/* PFSYNC_ACT_DEL_F */ "fragment-delete",
/* PFSYNC_ACT_BUS */ "bulk-update-mark",
/* PFSYNC_ACT_TDB */ "TDB-replay-counter-update",
/* PFSYNC_ACT_EOF */ "end-of-frame-mark",
};
static void
pfsync_acts_stats(const char *list, const char *desc, uint64_t *a)
{
int i;
xo_open_list(list);
for (i = 0; i < PFSYNC_ACT_MAX; i++, a++) {
if (*a || sflag <= 1) {
xo_open_instance(list);
xo_emit("\t\t{e:name}{:count/%ju} {N:/%s%s %s}\n",
pfsyncacts_name[i], (uintmax_t)(*a),
pfsyncacts[i], plural(*a), desc);
xo_close_instance(list);
}
}
xo_close_list(list);
}
/*
* Dump pfsync statistics structure.
*/
void
pfsync_stats(u_long off, const char *name, int af1 __unused, int proto __unused)
{
struct pfsyncstats pfsyncstat;
if (fetch_stats("net.pfsync.stats", off, &pfsyncstat,
sizeof(pfsyncstat), kread) != 0)
return;
xo_emit("{T:/%s}:\n", name);
xo_open_container(name);
#define p(f, m) if (pfsyncstat.f || sflag <= 1) \
xo_emit(m, (uintmax_t)pfsyncstat.f, plural(pfsyncstat.f))
p(pfsyncs_ipackets, "\t{:received-inet-packets/%ju} "
"{N:/packet%s received (IPv4)}\n");
p(pfsyncs_ipackets6, "\t{:received-inet6-packets/%ju} "
"{N:/packet%s received (IPv6)}\n");
pfsync_acts_stats("input-histogram", "received",
&pfsyncstat.pfsyncs_iacts[0]);
p(pfsyncs_badif, "\t\t/{:dropped-bad-interface/%ju} "
"{N:/packet%s discarded for bad interface}\n");
p(pfsyncs_badttl, "\t\t{:dropped-bad-ttl/%ju} "
"{N:/packet%s discarded for bad ttl}\n");
p(pfsyncs_hdrops, "\t\t{:dropped-short-header/%ju} "
"{N:/packet%s shorter than header}\n");
p(pfsyncs_badver, "\t\t{:dropped-bad-version/%ju} "
"{N:/packet%s discarded for bad version}\n");
p(pfsyncs_badauth, "\t\t{:dropped-bad-auth/%ju} "
"{N:/packet%s discarded for bad HMAC}\n");
p(pfsyncs_badact,"\t\t{:dropped-bad-action/%ju} "
"{N:/packet%s discarded for bad action}\n");
p(pfsyncs_badlen, "\t\t{:dropped-short/%ju} "
"{N:/packet%s discarded for short packet}\n");
p(pfsyncs_badval, "\t\t{:dropped-bad-values/%ju} "
"{N:/state%s discarded for bad values}\n");
p(pfsyncs_stale, "\t\t{:dropped-stale-state/%ju} "
"{N:/stale state%s}\n");
p(pfsyncs_badstate, "\t\t{:dropped-failed-lookup/%ju} "
"{N:/failed state lookup\\/insert%s}\n");
p(pfsyncs_opackets, "\t{:sent-inet-packets/%ju} "
"{N:/packet%s sent (IPv4})\n");
p(pfsyncs_opackets6, "\t{:send-inet6-packets/%ju} "
"{N:/packet%s sent (IPv6})\n");
pfsync_acts_stats("output-histogram", "sent",
&pfsyncstat.pfsyncs_oacts[0]);
p(pfsyncs_onomem, "\t\t{:discarded-no-memory/%ju} "
"{N:/failure%s due to mbuf memory error}\n");
p(pfsyncs_oerrors, "\t\t{:send-errors/%ju} "
"{N:/send error%s}\n");
#undef p
xo_close_container(name);
}
#endif /* PF */
/*
* Display a formatted value, or a '-' in the same space.
*/
static void
show_stat(const char *fmt, int width, const char *name,
u_long value, short showvalue, int div1000)
{
const char *lsep, *rsep;
char newfmt[64];
lsep = "";
if (strncmp(fmt, "LS", 2) == 0) {
lsep = " ";
fmt += 2;
}
rsep = " ";
if (strncmp(fmt, "NRS", 3) == 0) {
rsep = "";
fmt += 3;
}
if (showvalue == 0) {
/* Print just dash. */
xo_emit("{P:/%s}{D:/%*s}{P:/%s}", lsep, width, "-", rsep);
return;
}
/*
* XXX: workaround {P:} modifier can't be empty and doesn't seem to
* take args... so we need to conditionally include it in the format.
*/
#define maybe_pad(pad) do { \
if (strlen(pad)) { \
snprintf(newfmt, sizeof(newfmt), "{P:%s}", pad); \
xo_emit(newfmt); \
} \
} while (0)
if (hflag) {
char buf[5];
/* Format in human readable form. */
humanize_number(buf, sizeof(buf), (int64_t)value, "",
HN_AUTOSCALE, HN_NOSPACE | HN_DECIMAL | \
((div1000) ? HN_DIVISOR_1000 : 0));
maybe_pad(lsep);
snprintf(newfmt, sizeof(newfmt), "{:%s/%%%ds}", name, width);
xo_emit(newfmt, buf);
maybe_pad(rsep);
} else {
/* Construct the format string. */
maybe_pad(lsep);
snprintf(newfmt, sizeof(newfmt), "{:%s/%%%d%s}",
name, width, fmt);
xo_emit(newfmt, value);
maybe_pad(rsep);
}
}
/*
* Find next multiaddr for a given interface name.
*/
static struct ifmaddrs *
next_ifma(struct ifmaddrs *ifma, const char *name, const sa_family_t family)
{
for(; ifma != NULL; ifma = ifma->ifma_next) {
struct sockaddr_dl *sdl;
sdl = (struct sockaddr_dl *)ifma->ifma_name;
if (ifma->ifma_addr->sa_family == family &&
strcmp(sdl->sdl_data, name) == 0)
break;
}
return (ifma);
}
/*
* Print a description of the network interfaces.
*/
void
intpr(void (*pfunc)(char *), int af)
{
struct ifaddrs *ifap, *ifa;
struct ifmaddrs *ifmap, *ifma;
u_int ifn_len_max = 5, ifn_len;
u_int has_ipv6 = 0, net_len = 13, addr_len = 17;
if (interval)
return sidewaysintpr();
if (getifaddrs(&ifap) != 0)
err(EX_OSERR, "getifaddrs");
if (aflag && getifmaddrs(&ifmap) != 0)
err(EX_OSERR, "getifmaddrs");
if (Wflag) {
for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
if (interface != NULL &&
strcmp(ifa->ifa_name, interface) != 0)
continue;
if (af != AF_UNSPEC && ifa->ifa_addr->sa_family != af)
continue;
ifn_len = strlen(ifa->ifa_name);
if ((ifa->ifa_flags & IFF_UP) == 0)
++ifn_len;
ifn_len_max = MAX(ifn_len_max, ifn_len);
if (ifa->ifa_addr->sa_family == AF_INET6)
has_ipv6 = 1;
}
if (has_ipv6) {
net_len = 24;
addr_len = 39;
} else
net_len = 18;
}
xo_open_list("interface");
if (!pfunc) {
xo_emit("{T:/%-*.*s}", ifn_len_max, ifn_len_max, "Name");
xo_emit(" {T:/%5.5s} {T:/%-*.*s} {T:/%-*.*s} {T:/%8.8s} "
"{T:/%5.5s} {T:/%5.5s}",
"Mtu", net_len, net_len, "Network", addr_len, addr_len,
"Address", "Ipkts", "Ierrs", "Idrop");
if (bflag)
xo_emit(" {T:/%10.10s}","Ibytes");
xo_emit(" {T:/%8.8s} {T:/%5.5s}", "Opkts", "Oerrs");
if (bflag)
xo_emit(" {T:/%10.10s}","Obytes");
xo_emit(" {T:/%5s}", "Coll");
if (dflag)
xo_emit(" {T:/%5.5s}", "Drop");
xo_emit("\n");
}
for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
bool network = false, link = false;
char *name, *xname, buf[IFNAMSIZ+1];
const char *nn, *rn;
if (interface != NULL && strcmp(ifa->ifa_name, interface) != 0)
continue;
name = ifa->ifa_name;
if (pfunc) {
(*pfunc)(name);
/*
* Skip all ifaddrs belonging to same interface.
*/
while(ifa->ifa_next != NULL &&
(strcmp(ifa->ifa_next->ifa_name, name) == 0)) {
ifa = ifa->ifa_next;
}
continue;
}
if (af != AF_UNSPEC && ifa->ifa_addr->sa_family != af)
continue;
xo_open_instance("interface");
if ((ifa->ifa_flags & IFF_UP) == 0) {
xname = stpcpy(buf, name);
*xname++ = '*';
*xname = '\0';
xname = buf;
} else
xname = name;
xo_emit("{d:/%-*.*s}{etk:name}{eq:flags/0x%x}",
ifn_len_max, ifn_len_max, xname, name, ifa->ifa_flags);
#define IFA_MTU(ifa) (((struct if_data *)(ifa)->ifa_data)->ifi_mtu)
show_stat("lu", 6, "mtu", IFA_MTU(ifa), IFA_MTU(ifa), 0);
#undef IFA_MTU
switch (ifa->ifa_addr->sa_family) {
case AF_UNSPEC:
xo_emit("{:network/%-*.*s} ", net_len, net_len,
"none");
xo_emit("{:address/%-*.*s} ", addr_len, addr_len,
"none");
break;
case AF_INET:
#ifdef INET6
case AF_INET6:
#endif /* INET6 */
nn = netname(ifa->ifa_addr, ifa->ifa_netmask);
rn = routename(ifa->ifa_addr, numeric_addr);
if (Wflag) {
xo_emit("{t:network/%-*s} ", net_len, nn);
xo_emit("{t:address/%-*s} ", addr_len, rn);
} else {
xo_emit("{d:network/%-*.*s}{et:network} ",
net_len, net_len, nn, nn);
xo_emit("{d:address/%-*.*s}{et:address} ",
addr_len, addr_len, rn, rn);
}
network = true;
break;
case AF_LINK:
{
struct sockaddr_dl *sdl;
char linknum[sizeof("<Link#32767>")];
sdl = (struct sockaddr_dl *)ifa->ifa_addr;
snprintf(linknum, sizeof(linknum), "<Link#%d>", sdl->sdl_index);
xo_emit("{t:network/%-*.*s} ", net_len, net_len,
linknum);
if (sdl->sdl_nlen == 0 &&
sdl->sdl_alen == 0 &&
sdl->sdl_slen == 0)
xo_emit("{P:/%*s} ", addr_len, "");
else
xo_emit("{t:address/%-*.*s} ", addr_len,
addr_len, routename(ifa->ifa_addr, 1));
link = true;
break;
}
}
#define IFA_STAT(s) (((struct if_data *)ifa->ifa_data)->ifi_ ## s)
show_stat("lu", 8, "received-packets", IFA_STAT(ipackets),
link|network, 1);
show_stat("lu", 5, "received-errors", IFA_STAT(ierrors),
link, 1);
show_stat("lu", 5, "dropped-packets", IFA_STAT(iqdrops),
link, 1);
if (bflag)
show_stat("lu", 10, "received-bytes", IFA_STAT(ibytes),
link|network, 0);
show_stat("lu", 8, "sent-packets", IFA_STAT(opackets),
link|network, 1);
show_stat("lu", 5, "send-errors", IFA_STAT(oerrors), link, 1);
if (bflag)
show_stat("lu", 10, "sent-bytes", IFA_STAT(obytes),
link|network, 0);
show_stat("NRSlu", 5, "collisions", IFA_STAT(collisions),
link, 1);
if (dflag)
show_stat("LSlu", 5, "dropped-packets",
IFA_STAT(oqdrops), link, 1);
xo_emit("\n");
if (!aflag) {
xo_close_instance("interface");
continue;
}
/*
* Print family's multicast addresses.
*/
xo_open_list("multicast-address");
for (ifma = next_ifma(ifmap, ifa->ifa_name,
ifa->ifa_addr->sa_family);
ifma != NULL;
ifma = next_ifma(ifma, ifa->ifa_name,
ifa->ifa_addr->sa_family)) {
const char *fmt = NULL;
xo_open_instance("multicast-address");
switch (ifma->ifma_addr->sa_family) {
case AF_LINK:
{
struct sockaddr_dl *sdl;
sdl = (struct sockaddr_dl *)ifma->ifma_addr;
if (sdl->sdl_type != IFT_ETHER &&
sdl->sdl_type != IFT_FDDI)
break;
}
/* FALLTHROUGH */
case AF_INET:
#ifdef INET6
case AF_INET6:
#endif /* INET6 */
fmt = routename(ifma->ifma_addr, numeric_addr);
break;
}
if (fmt) {
if (Wflag)
xo_emit("{P:/%27s }"
"{t:address/%-17s/}", "", fmt);
else
xo_emit("{P:/%25s }"
"{t:address/%-17.17s/}", "", fmt);
if (ifma->ifma_addr->sa_family == AF_LINK) {
xo_emit(" {:received-packets/%8lu}",
IFA_STAT(imcasts));
xo_emit("{P:/%*s}", bflag? 17 : 6, "");
xo_emit(" {:sent-packets/%8lu}",
IFA_STAT(omcasts));
}
xo_emit("\n");
}
xo_close_instance("multicast-address");
ifma = ifma->ifma_next;
}
xo_close_list("multicast-address");
xo_close_instance("interface");
}
xo_close_list("interface");
freeifaddrs(ifap);
if (aflag)
freeifmaddrs(ifmap);
}
struct iftot {
u_long ift_ip; /* input packets */
u_long ift_ie; /* input errors */
u_long ift_id; /* input drops */
u_long ift_op; /* output packets */
u_long ift_oe; /* output errors */
u_long ift_od; /* output drops */
u_long ift_co; /* collisions */
u_long ift_ib; /* input bytes */
u_long ift_ob; /* output bytes */
};
/*
* Obtain stats for interface(s).
*/
static void
fill_iftot(struct iftot *st)
{
struct ifaddrs *ifap, *ifa;
bool found = false;
if (getifaddrs(&ifap) != 0)
xo_err(EX_OSERR, "getifaddrs");
bzero(st, sizeof(*st));
for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
if (ifa->ifa_addr->sa_family != AF_LINK)
continue;
if (interface) {
if (strcmp(ifa->ifa_name, interface) == 0)
found = true;
else
continue;
}
st->ift_ip += IFA_STAT(ipackets);
st->ift_ie += IFA_STAT(ierrors);
st->ift_id += IFA_STAT(iqdrops);
st->ift_ib += IFA_STAT(ibytes);
st->ift_op += IFA_STAT(opackets);
st->ift_oe += IFA_STAT(oerrors);
st->ift_od += IFA_STAT(oqdrops);
st->ift_ob += IFA_STAT(obytes);
st->ift_co += IFA_STAT(collisions);
}
if (interface && found == false)
xo_err(EX_DATAERR, "interface %s not found", interface);
freeifaddrs(ifap);
}
/*
* Set a flag to indicate that a signal from the periodic itimer has been
* caught.
*/
static sig_atomic_t signalled;
static void
catchalarm(int signo __unused)
{
signalled = true;
}
/*
* Print a running summary of interface statistics.
* Repeat display every interval seconds, showing statistics
* collected over that interval. Assumes that interval is non-zero.
* First line printed at top of screen is always cumulative.
*/
static void
sidewaysintpr(void)
{
struct iftot ift[2], *new, *old;
struct itimerval interval_it;
int oldmask, line;
new = &ift[0];
old = &ift[1];
fill_iftot(old);
(void)signal(SIGALRM, catchalarm);
signalled = false;
interval_it.it_interval.tv_sec = interval;
interval_it.it_interval.tv_usec = 0;
interval_it.it_value = interval_it.it_interval;
setitimer(ITIMER_REAL, &interval_it, NULL);
xo_open_list("interface-statistics");
banner:
xo_emit("{T:/%17s} {T:/%14s} {T:/%16s}\n", "input",
interface != NULL ? interface : "(Total)", "output");
xo_emit("{T:/%10s} {T:/%5s} {T:/%5s} {T:/%10s} {T:/%10s} {T:/%5s} "
"{T:/%10s} {T:/%5s}",
"packets", "errs", "idrops", "bytes", "packets", "errs", "bytes",
"colls");
if (dflag)
xo_emit(" {T:/%5.5s}", "drops");
xo_emit("\n");
xo_flush();
line = 0;
loop:
if ((noutputs != 0) && (--noutputs == 0)) {
xo_close_list("interface-statistics");
return;
}
oldmask = sigblock(sigmask(SIGALRM));
while (!signalled)
sigpause(0);
signalled = false;
sigsetmask(oldmask);
line++;
fill_iftot(new);
xo_open_instance("stats");
show_stat("lu", 10, "received-packets",
new->ift_ip - old->ift_ip, 1, 1);
show_stat("lu", 5, "received-errors",
new->ift_ie - old->ift_ie, 1, 1);
show_stat("lu", 5, "dropped-packets",
new->ift_id - old->ift_id, 1, 1);
show_stat("lu", 10, "received-bytes",
new->ift_ib - old->ift_ib, 1, 0);
show_stat("lu", 10, "sent-packets",
new->ift_op - old->ift_op, 1, 1);
show_stat("lu", 5, "send-errors",
new->ift_oe - old->ift_oe, 1, 1);
show_stat("lu", 10, "sent-bytes",
new->ift_ob - old->ift_ob, 1, 0);
show_stat("NRSlu", 5, "collisions",
new->ift_co - old->ift_co, 1, 1);
if (dflag)
show_stat("LSlu", 5, "dropped-packets",
new->ift_od - old->ift_od, 1, 1);
xo_close_instance("stats");
xo_emit("\n");
xo_flush();
if (new == &ift[0]) {
new = &ift[1];
old = &ift[0];
} else {
new = &ift[0];
old = &ift[1];
}
if (line == 21)
goto banner;
else
goto loop;
/* NOTREACHED */
}