d/freebsd-nq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
2d943d5b94
freebsd-nq/usr.bin/netstat/inet.c
Gleb Smirnoff f89bcdb03b Use pluralies() for "entry"/"entries".
2013-01-22 18:07:59 +00:00

1310 lines
39 KiB
C
Raw Blame History

/*-
* Copyright (c) 1983, 1988, 1993, 1995
* 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.
* 4. 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[] = "@(#)inet.c 8.5 (Berkeley) 5/24/95";
#endif /* not lint */
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/domain.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/sysctl.h>
#include <net/route.h>
#include <net/if_arp.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/ip_carp.h>
#ifdef INET6
#include <netinet/ip6.h>
#endif /* INET6 */
#include <netinet/in_pcb.h>
#include <netinet/ip_icmp.h>
#include <netinet/icmp_var.h>
#include <netinet/igmp_var.h>
#include <netinet/ip_var.h>
#include <netinet/pim_var.h>
#include <netinet/tcp.h>
#include <netinet/tcpip.h>
#include <netinet/tcp_seq.h>
#define TCPSTATES
#include <netinet/tcp_fsm.h>
#include <netinet/tcp_timer.h>
#include <netinet/tcp_var.h>
#include <netinet/tcp_debug.h>
#include <netinet/udp.h>
#include <netinet/udp_var.h>
#include <arpa/inet.h>
#include <err.h>
#include <errno.h>
#include <libutil.h>
#include <netdb.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "netstat.h"
char *inetname(struct in_addr *);
void inetprint(struct in_addr *, int, const char *, int);
#ifdef INET6
static int udp_done, tcp_done, sdp_done;
#endif /* INET6 */
static int
pcblist_sysctl(int proto, const char *name, char **bufp, int istcp)
{
const char *mibvar;
char *buf;
size_t len;
switch (proto) {
case IPPROTO_TCP:
mibvar = "net.inet.tcp.pcblist";
break;
case IPPROTO_UDP:
mibvar = "net.inet.udp.pcblist";
break;
case IPPROTO_DIVERT:
mibvar = "net.inet.divert.pcblist";
break;
default:
mibvar = "net.inet.raw.pcblist";
break;
}
if (strncmp(name, "sdp", 3) == 0)
mibvar = "net.inet.sdp.pcblist";
len = 0;
if (sysctlbyname(mibvar, 0, &len, 0, 0) < 0) {
if (errno != ENOENT)
warn("sysctl: %s", mibvar);
return (0);
}
if ((buf = malloc(len)) == 0) {
warnx("malloc %lu bytes", (u_long)len);
return (0);
}
if (sysctlbyname(mibvar, buf, &len, 0, 0) < 0) {
warn("sysctl: %s", mibvar);
free(buf);
return (0);
}
*bufp = buf;
return (1);
}
/*
* Copied directly from uipc_socket2.c. We leave out some fields that are in
* nested structures that aren't used to avoid extra work.
*/
static void
sbtoxsockbuf(struct sockbuf *sb, struct xsockbuf *xsb)
{
xsb->sb_cc = sb->sb_cc;
xsb->sb_hiwat = sb->sb_hiwat;
xsb->sb_mbcnt = sb->sb_mbcnt;
xsb->sb_mcnt = sb->sb_mcnt;
xsb->sb_ccnt = sb->sb_ccnt;
xsb->sb_mbmax = sb->sb_mbmax;
xsb->sb_lowat = sb->sb_lowat;
xsb->sb_flags = sb->sb_flags;
xsb->sb_timeo = sb->sb_timeo;
}
int
sotoxsocket(struct socket *so, struct xsocket *xso)
{
struct protosw proto;
struct domain domain;
bzero(xso, sizeof *xso);
xso->xso_len = sizeof *xso;
xso->xso_so = so;
xso->so_type = so->so_type;
xso->so_options = so->so_options;
xso->so_linger = so->so_linger;
xso->so_state = so->so_state;
xso->so_pcb = so->so_pcb;
if (kread((uintptr_t)so->so_proto, &proto, sizeof(proto)) != 0)
return (-1);
xso->xso_protocol = proto.pr_protocol;
if (kread((uintptr_t)proto.pr_domain, &domain, sizeof(domain)) != 0)
return (-1);
xso->xso_family = domain.dom_family;
xso->so_qlen = so->so_qlen;
xso->so_incqlen = so->so_incqlen;
xso->so_qlimit = so->so_qlimit;
xso->so_timeo = so->so_timeo;
xso->so_error = so->so_error;
xso->so_oobmark = so->so_oobmark;
sbtoxsockbuf(&so->so_snd, &xso->so_snd);
sbtoxsockbuf(&so->so_rcv, &xso->so_rcv);
return (0);
}
static int
pcblist_kvm(u_long off, char **bufp, int istcp)
{
struct inpcbinfo pcbinfo;
struct inpcbhead listhead;
struct inpcb *inp;
struct xinpcb xi;
struct xinpgen xig;
struct xtcpcb xt;
struct socket so;
struct xsocket *xso;
char *buf, *p;
size_t len;
if (off == 0)
return (0);
kread(off, &pcbinfo, sizeof(pcbinfo));
if (istcp)
len = 2 * sizeof(xig) +
(pcbinfo.ipi_count + pcbinfo.ipi_count / 8) *
sizeof(struct xtcpcb);
else
len = 2 * sizeof(xig) +
(pcbinfo.ipi_count + pcbinfo.ipi_count / 8) *
sizeof(struct xinpcb);
if ((buf = malloc(len)) == 0) {
warnx("malloc %lu bytes", (u_long)len);
return (0);
}
p = buf;
#define COPYOUT(obj, size) do { \
if (len < (size)) { \
warnx("buffer size exceeded"); \
goto fail; \
} \
bcopy((obj), p, (size)); \
len -= (size); \
p += (size); \
} while (0)
#define KREAD(off, buf, len) do { \
if (kread((uintptr_t)(off), (buf), (len)) != 0) \
goto fail; \
} while (0)
/* Write out header. */
xig.xig_len = sizeof xig;
xig.xig_count = pcbinfo.ipi_count;
xig.xig_gen = pcbinfo.ipi_gencnt;
xig.xig_sogen = 0;
COPYOUT(&xig, sizeof xig);
/* Walk the PCB list. */
xt.xt_len = sizeof xt;
xi.xi_len = sizeof xi;
if (istcp)
xso = &xt.xt_socket;
else
xso = &xi.xi_socket;
KREAD(pcbinfo.ipi_listhead, &listhead, sizeof(listhead));
LIST_FOREACH(inp, &listhead, inp_list) {
if (istcp) {
KREAD(inp, &xt.xt_inp, sizeof(*inp));
inp = &xt.xt_inp;
} else {
KREAD(inp, &xi.xi_inp, sizeof(*inp));
inp = &xi.xi_inp;
}
if (inp->inp_gencnt > pcbinfo.ipi_gencnt)
continue;
if (istcp) {
if (inp->inp_ppcb == NULL)
bzero(&xt.xt_tp, sizeof xt.xt_tp);
else if (inp->inp_flags & INP_TIMEWAIT) {
bzero(&xt.xt_tp, sizeof xt.xt_tp);
xt.xt_tp.t_state = TCPS_TIME_WAIT;
} else
KREAD(inp->inp_ppcb, &xt.xt_tp,
sizeof xt.xt_tp);
}
if (inp->inp_socket) {
KREAD(inp->inp_socket, &so, sizeof(so));
if (sotoxsocket(&so, xso) != 0)
goto fail;
} else {
bzero(xso, sizeof(*xso));
if (istcp)
xso->xso_protocol = IPPROTO_TCP;
}
if (istcp)
COPYOUT(&xt, sizeof xt);
else
COPYOUT(&xi, sizeof xi);
}
/* Reread the pcbinfo and write out the footer. */
kread(off, &pcbinfo, sizeof(pcbinfo));
xig.xig_count = pcbinfo.ipi_count;
xig.xig_gen = pcbinfo.ipi_gencnt;
COPYOUT(&xig, sizeof xig);
*bufp = buf;
return (1);
fail:
free(buf);
return (0);
#undef COPYOUT
#undef KREAD
}
/*
* Print a summary of connections related to an Internet
* protocol. For TCP, also give state of connection.
* Listening processes (aflag) are suppressed unless the
* -a (all) flag is specified.
*/
void
protopr(u_long off, const char *name, int af1, int proto)
{
int istcp;
static int first = 1;
char *buf;
const char *vchar;
struct tcpcb *tp = NULL;
struct inpcb *inp;
struct xinpgen *xig, *oxig;
struct xsocket *so;
struct xtcp_timer *timer;
istcp = 0;
switch (proto) {
case IPPROTO_TCP:
#ifdef INET6
if (strncmp(name, "sdp", 3) != 0) {
if (tcp_done != 0)
return;
else
tcp_done = 1;
} else {
if (sdp_done != 0)
return;
else
sdp_done = 1;
}
#endif
istcp = 1;
break;
case IPPROTO_UDP:
#ifdef INET6
if (udp_done != 0)
return;
else
udp_done = 1;
#endif
break;
}
if (live) {
if (!pcblist_sysctl(proto, name, &buf, istcp))
return;
} else {
if (!pcblist_kvm(off, &buf, istcp))
return;
}
oxig = xig = (struct xinpgen *)buf;
for (xig = (struct xinpgen *)((char *)xig + xig->xig_len);
xig->xig_len > sizeof(struct xinpgen);
xig = (struct xinpgen *)((char *)xig + xig->xig_len)) {
if (istcp) {
timer = &((struct xtcpcb *)xig)->xt_timer;
tp = &((struct xtcpcb *)xig)->xt_tp;
inp = &((struct xtcpcb *)xig)->xt_inp;
so = &((struct xtcpcb *)xig)->xt_socket;
} else {
inp = &((struct xinpcb *)xig)->xi_inp;
so = &((struct xinpcb *)xig)->xi_socket;
timer = NULL;
}
/* Ignore sockets for protocols other than the desired one. */
if (so->xso_protocol != proto)
continue;
/* Ignore PCBs which were freed during copyout. */
if (inp->inp_gencnt > oxig->xig_gen)
continue;
if ((af1 == AF_INET && (inp->inp_vflag & INP_IPV4) == 0)
#ifdef INET6
|| (af1 == AF_INET6 && (inp->inp_vflag & INP_IPV6) == 0)
#endif /* INET6 */
|| (af1 == AF_UNSPEC && ((inp->inp_vflag & INP_IPV4) == 0
#ifdef INET6
&& (inp->inp_vflag & INP_IPV6) == 0
#endif /* INET6 */
))
)
continue;
if (!aflag &&
(
(istcp && tp->t_state == TCPS_LISTEN)
|| (af1 == AF_INET &&
inet_lnaof(inp->inp_laddr) == INADDR_ANY)
#ifdef INET6
|| (af1 == AF_INET6 &&
IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr))
#endif /* INET6 */
|| (af1 == AF_UNSPEC &&
(((inp->inp_vflag & INP_IPV4) != 0 &&
inet_lnaof(inp->inp_laddr) == INADDR_ANY)
#ifdef INET6
|| ((inp->inp_vflag & INP_IPV6) != 0 &&
IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr))
#endif
))
))
continue;
if (first) {
if (!Lflag) {
printf("Active Internet connections");
if (aflag)
printf(" (including servers)");
} else
printf(
"Current listen queue sizes (qlen/incqlen/maxqlen)");
putchar('\n');
if (Aflag)
printf("%-*s ", 2 * (int)sizeof(void *), "Tcpcb");
if (Lflag)
printf((Aflag && !Wflag) ?
"%-5.5s %-14.14s %-18.18s" :
"%-5.5s %-14.14s %-22.22s",
"Proto", "Listen", "Local Address");
else if (Tflag)
printf((Aflag && !Wflag) ?
"%-5.5s %-6.6s %-6.6s %-6.6s %-18.18s %s" :
"%-5.5s %-6.6s %-6.6s %-6.6s %-22.22s %s",
"Proto", "Rexmit", "OOORcv", "0-win",
"Local Address", "Foreign Address");
else {
printf((Aflag && !Wflag) ?
"%-5.5s %-6.6s %-6.6s %-18.18s %-18.18s" :
"%-5.5s %-6.6s %-6.6s %-22.22s %-22.22s",
"Proto", "Recv-Q", "Send-Q",
"Local Address", "Foreign Address");
if (!xflag)
printf(" (state)");
}
if (xflag) {
printf(" %-6.6s %-6.6s %-6.6s %-6.6s %-6.6s %-6.6s %-6.6s %-6.6s %-6.6s %-6.6s %-6.6s %-6.6s",
"R-MBUF", "S-MBUF", "R-CLUS",
"S-CLUS", "R-HIWA", "S-HIWA",
"R-LOWA", "S-LOWA", "R-BCNT",
"S-BCNT", "R-BMAX", "S-BMAX");
printf(" %7.7s %7.7s %7.7s %7.7s %7.7s %7.7s",
"rexmt", "persist", "keep",
"2msl", "delack", "rcvtime");
}
putchar('\n');
first = 0;
}
if (Lflag && so->so_qlimit == 0)
continue;
if (Aflag) {
if (istcp)
printf("%*lx ", 2 * (int)sizeof(void *), (u_long)inp->inp_ppcb);
else
printf("%*lx ", 2 * (int)sizeof(void *), (u_long)so->so_pcb);
}
#ifdef INET6
if ((inp->inp_vflag & INP_IPV6) != 0)
vchar = ((inp->inp_vflag & INP_IPV4) != 0) ?
"46" : "6 ";
else
#endif
vchar = ((inp->inp_vflag & INP_IPV4) != 0) ?
"4 " : " ";
if (istcp && (tp->t_flags & TF_TOE) != 0)
printf("%-3.3s%-2.2s ", "toe", vchar);
else
printf("%-3.3s%-2.2s ", name, vchar);
if (Lflag) {
char buf1[15];
snprintf(buf1, 15, "%d/%d/%d", so->so_qlen,
so->so_incqlen, so->so_qlimit);
printf("%-14.14s ", buf1);
} else if (Tflag) {
if (istcp)
printf("%6u %6u %6u ", tp->t_sndrexmitpack,
tp->t_rcvoopack, tp->t_sndzerowin);
} else {
printf("%6u %6u ", so->so_rcv.sb_cc, so->so_snd.sb_cc);
}
if (numeric_port) {
if (inp->inp_vflag & INP_IPV4) {
inetprint(&inp->inp_laddr, (int)inp->inp_lport,
name, 1);
if (!Lflag)
inetprint(&inp->inp_faddr,
(int)inp->inp_fport, name, 1);
}
#ifdef INET6
else if (inp->inp_vflag & INP_IPV6) {
inet6print(&inp->in6p_laddr,
(int)inp->inp_lport, name, 1);
if (!Lflag)
inet6print(&inp->in6p_faddr,
(int)inp->inp_fport, name, 1);
} /* else nothing printed now */
#endif /* INET6 */
} else if (inp->inp_flags & INP_ANONPORT) {
if (inp->inp_vflag & INP_IPV4) {
inetprint(&inp->inp_laddr, (int)inp->inp_lport,
name, 1);
if (!Lflag)
inetprint(&inp->inp_faddr,
(int)inp->inp_fport, name, 0);
}
#ifdef INET6
else if (inp->inp_vflag & INP_IPV6) {
inet6print(&inp->in6p_laddr,
(int)inp->inp_lport, name, 1);
if (!Lflag)
inet6print(&inp->in6p_faddr,
(int)inp->inp_fport, name, 0);
} /* else nothing printed now */
#endif /* INET6 */
} else {
if (inp->inp_vflag & INP_IPV4) {
inetprint(&inp->inp_laddr, (int)inp->inp_lport,
name, 0);
if (!Lflag)
inetprint(&inp->inp_faddr,
(int)inp->inp_fport, name,
inp->inp_lport != inp->inp_fport);
}
#ifdef INET6
else if (inp->inp_vflag & INP_IPV6) {
inet6print(&inp->in6p_laddr,
(int)inp->inp_lport, name, 0);
if (!Lflag)
inet6print(&inp->in6p_faddr,
(int)inp->inp_fport, name,
inp->inp_lport != inp->inp_fport);
} /* else nothing printed now */
#endif /* INET6 */
}
if (xflag) {
printf("%6u %6u %6u %6u %6u %6u %6u %6u %6u %6u %6u %6u",
so->so_rcv.sb_mcnt, so->so_snd.sb_mcnt,
so->so_rcv.sb_ccnt, so->so_snd.sb_ccnt,
so->so_rcv.sb_hiwat, so->so_snd.sb_hiwat,
so->so_rcv.sb_lowat, so->so_snd.sb_lowat,
so->so_rcv.sb_mbcnt, so->so_snd.sb_mbcnt,
so->so_rcv.sb_mbmax, so->so_snd.sb_mbmax);
if (timer != NULL)
printf(" %4d.%02d %4d.%02d %4d.%02d %4d.%02d %4d.%02d %4d.%02d",
timer->tt_rexmt / 1000, (timer->tt_rexmt % 1000) / 10,
timer->tt_persist / 1000, (timer->tt_persist % 1000) / 10,
timer->tt_keep / 1000, (timer->tt_keep % 1000) / 10,
timer->tt_2msl / 1000, (timer->tt_2msl % 1000) / 10,
timer->tt_delack / 1000, (timer->tt_delack % 1000) / 10,
timer->t_rcvtime / 1000, (timer->t_rcvtime % 1000) / 10);
}
if (istcp && !Lflag && !xflag && !Tflag) {
if (tp->t_state < 0 || tp->t_state >= TCP_NSTATES)
printf("%d", tp->t_state);
else {
printf("%s", tcpstates[tp->t_state]);
#if defined(TF_NEEDSYN) && defined(TF_NEEDFIN)
/* Show T/TCP `hidden state' */
if (tp->t_flags & (TF_NEEDSYN|TF_NEEDFIN))
putchar('*');
#endif /* defined(TF_NEEDSYN) && defined(TF_NEEDFIN) */
}
}
putchar('\n');
}
if (xig != oxig && xig->xig_gen != oxig->xig_gen) {
if (oxig->xig_count > xig->xig_count) {
printf("Some %s sockets may have been deleted.\n",
name);
} else if (oxig->xig_count < xig->xig_count) {
printf("Some %s sockets may have been created.\n",
name);
} else {
printf(
"Some %s sockets may have been created or deleted.\n",
name);
}
}
free(buf);
}
/*
* Dump TCP statistics structure.
*/
void
tcp_stats(u_long off, const char *name, int af1 __unused, int proto __unused)
{
struct tcpstat tcpstat, zerostat;
size_t len = sizeof tcpstat;
#ifdef INET6
if (tcp_done != 0)
return;
else
tcp_done = 1;
#endif
if (live) {
if (zflag)
memset(&zerostat, 0, len);
if (sysctlbyname("net.inet.tcp.stats", &tcpstat, &len,
zflag ? &zerostat : NULL, zflag ? len : 0) < 0) {
warn("sysctl: net.inet.tcp.stats");
return;
}
} else
kread(off, &tcpstat, len);
printf ("%s:\n", name);
#define p(f, m) if (tcpstat.f || sflag <= 1) \
printf(m, tcpstat.f, plural(tcpstat.f))
#define p1a(f, m) if (tcpstat.f || sflag <= 1) \
printf(m, tcpstat.f)
#define p2(f1, f2, m) if (tcpstat.f1 || tcpstat.f2 || sflag <= 1) \
printf(m, tcpstat.f1, plural(tcpstat.f1), tcpstat.f2, plural(tcpstat.f2))
#define p2a(f1, f2, m) if (tcpstat.f1 || tcpstat.f2 || sflag <= 1) \
printf(m, tcpstat.f1, plural(tcpstat.f1), tcpstat.f2)
#define p3(f, m) if (tcpstat.f || sflag <= 1) \
printf(m, tcpstat.f, pluralies(tcpstat.f))
p(tcps_sndtotal, "\t%lu packet%s sent\n");
p2(tcps_sndpack,tcps_sndbyte, "\t\t%lu data packet%s (%lu byte%s)\n");
p2(tcps_sndrexmitpack, tcps_sndrexmitbyte,
"\t\t%lu data packet%s (%lu byte%s) retransmitted\n");
p(tcps_sndrexmitbad,
"\t\t%lu data packet%s unnecessarily retransmitted\n");
p(tcps_mturesent, "\t\t%lu resend%s initiated by MTU discovery\n");
p2a(tcps_sndacks, tcps_delack,
"\t\t%lu ack-only packet%s (%lu delayed)\n");
p(tcps_sndurg, "\t\t%lu URG only packet%s\n");
p(tcps_sndprobe, "\t\t%lu window probe packet%s\n");
p(tcps_sndwinup, "\t\t%lu window update packet%s\n");
p(tcps_sndctrl, "\t\t%lu control packet%s\n");
p(tcps_rcvtotal, "\t%lu packet%s received\n");
p2(tcps_rcvackpack, tcps_rcvackbyte,
"\t\t%lu ack%s (for %lu byte%s)\n");
p(tcps_rcvdupack, "\t\t%lu duplicate ack%s\n");
p(tcps_rcvacktoomuch, "\t\t%lu ack%s for unsent data\n");
p2(tcps_rcvpack, tcps_rcvbyte,
"\t\t%lu packet%s (%lu byte%s) received in-sequence\n");
p2(tcps_rcvduppack, tcps_rcvdupbyte,
"\t\t%lu completely duplicate packet%s (%lu byte%s)\n");
p(tcps_pawsdrop, "\t\t%lu old duplicate packet%s\n");
p2(tcps_rcvpartduppack, tcps_rcvpartdupbyte,
"\t\t%lu packet%s with some dup. data (%lu byte%s duped)\n");
p2(tcps_rcvoopack, tcps_rcvoobyte,
"\t\t%lu out-of-order packet%s (%lu byte%s)\n");
p2(tcps_rcvpackafterwin, tcps_rcvbyteafterwin,
"\t\t%lu packet%s (%lu byte%s) of data after window\n");
p(tcps_rcvwinprobe, "\t\t%lu window probe%s\n");
p(tcps_rcvwinupd, "\t\t%lu window update packet%s\n");
p(tcps_rcvafterclose, "\t\t%lu packet%s received after close\n");
p(tcps_rcvbadsum, "\t\t%lu discarded for bad checksum%s\n");
p(tcps_rcvbadoff, "\t\t%lu discarded for bad header offset field%s\n");
p1a(tcps_rcvshort, "\t\t%lu discarded because packet too short\n");
p1a(tcps_rcvmemdrop, "\t\t%lu discarded due to memory problems\n");
p(tcps_connattempt, "\t%lu connection request%s\n");
p(tcps_accepts, "\t%lu connection accept%s\n");
p(tcps_badsyn, "\t%lu bad connection attempt%s\n");
p(tcps_listendrop, "\t%lu listen queue overflow%s\n");
p(tcps_badrst, "\t%lu ignored RSTs in the window%s\n");
p(tcps_connects, "\t%lu connection%s established (including accepts)\n");
p2(tcps_closed, tcps_drops,
"\t%lu connection%s closed (including %lu drop%s)\n");
p(tcps_cachedrtt, "\t\t%lu connection%s updated cached RTT on close\n");
p(tcps_cachedrttvar,
"\t\t%lu connection%s updated cached RTT variance on close\n");
p(tcps_cachedssthresh,
"\t\t%lu connection%s updated cached ssthresh on close\n");
p(tcps_conndrops, "\t%lu embryonic connection%s dropped\n");
p2(tcps_rttupdated, tcps_segstimed,
"\t%lu segment%s updated rtt (of %lu attempt%s)\n");
p(tcps_rexmttimeo, "\t%lu retransmit timeout%s\n");
p(tcps_timeoutdrop, "\t\t%lu connection%s dropped by rexmit timeout\n");
p(tcps_persisttimeo, "\t%lu persist timeout%s\n");
p(tcps_persistdrop, "\t\t%lu connection%s dropped by persist timeout\n");
p(tcps_finwait2_drops,
"\t%lu Connection%s (fin_wait_2) dropped because of timeout\n");
p(tcps_keeptimeo, "\t%lu keepalive timeout%s\n");
p(tcps_keepprobe, "\t\t%lu keepalive probe%s sent\n");
p(tcps_keepdrops, "\t\t%lu connection%s dropped by keepalive\n");
p(tcps_predack, "\t%lu correct ACK header prediction%s\n");
p(tcps_preddat, "\t%lu correct data packet header prediction%s\n");
p3(tcps_sc_added, "\t%lu syncache entr%s added\n");
p1a(tcps_sc_retransmitted, "\t\t%lu retransmitted\n");
p1a(tcps_sc_dupsyn, "\t\t%lu dupsyn\n");
p1a(tcps_sc_dropped, "\t\t%lu dropped\n");
p1a(tcps_sc_completed, "\t\t%lu completed\n");
p1a(tcps_sc_bucketoverflow, "\t\t%lu bucket overflow\n");
p1a(tcps_sc_cacheoverflow, "\t\t%lu cache overflow\n");
p1a(tcps_sc_reset, "\t\t%lu reset\n");
p1a(tcps_sc_stale, "\t\t%lu stale\n");
p1a(tcps_sc_aborted, "\t\t%lu aborted\n");
p1a(tcps_sc_badack, "\t\t%lu badack\n");
p1a(tcps_sc_unreach, "\t\t%lu unreach\n");
p(tcps_sc_zonefail, "\t\t%lu zone failure%s\n");
p(tcps_sc_sendcookie, "\t%lu cookie%s sent\n");
p(tcps_sc_recvcookie, "\t%lu cookie%s received\n");
p3(tcps_hc_added, "\t%lu hostcache entr%s added\n");
p1a(tcps_hc_bucketoverflow, "\t\t%lu bucket overflow\n");
p(tcps_sack_recovery_episode, "\t%lu SACK recovery episode%s\n");
p(tcps_sack_rexmits,
"\t%lu segment rexmit%s in SACK recovery episodes\n");
p(tcps_sack_rexmit_bytes,
"\t%lu byte rexmit%s in SACK recovery episodes\n");
p(tcps_sack_rcv_blocks,
"\t%lu SACK option%s (SACK blocks) received\n");
p(tcps_sack_send_blocks, "\t%lu SACK option%s (SACK blocks) sent\n");
p1a(tcps_sack_sboverflow, "\t%lu SACK scoreboard overflow\n");
p(tcps_ecn_ce, "\t%lu packet%s with ECN CE bit set\n");
p(tcps_ecn_ect0, "\t%lu packet%s with ECN ECT(0) bit set\n");
p(tcps_ecn_ect1, "\t%lu packet%s with ECN ECT(1) bit set\n");
p(tcps_ecn_shs, "\t%lu successful ECN handshake%s\n");
p(tcps_ecn_rcwnd, "\t%lu time%s ECN reduced the congestion window\n");
#undef p
#undef p1a
#undef p2
#undef p2a
#undef p3
}
/*
* Dump UDP statistics structure.
*/
void
udp_stats(u_long off, const char *name, int af1 __unused, int proto __unused)
{
struct udpstat udpstat, zerostat;
size_t len = sizeof udpstat;
u_long delivered;
#ifdef INET6
if (udp_done != 0)
return;
else
udp_done = 1;
#endif
if (live) {
if (zflag)
memset(&zerostat, 0, len);
if (sysctlbyname("net.inet.udp.stats", &udpstat, &len,
zflag ? &zerostat : NULL, zflag ? len : 0) < 0) {
warn("sysctl: net.inet.udp.stats");
return;
}
} else
kread(off, &udpstat, len);
printf("%s:\n", name);
#define p(f, m) if (udpstat.f || sflag <= 1) \
printf(m, udpstat.f, plural(udpstat.f))
#define p1a(f, m) if (udpstat.f || sflag <= 1) \
printf(m, udpstat.f)
p(udps_ipackets, "\t%lu datagram%s received\n");
p1a(udps_hdrops, "\t%lu with incomplete header\n");
p1a(udps_badlen, "\t%lu with bad data length field\n");
p1a(udps_badsum, "\t%lu with bad checksum\n");
p1a(udps_nosum, "\t%lu with no checksum\n");
p1a(udps_noport, "\t%lu dropped due to no socket\n");
p(udps_noportbcast,
"\t%lu broadcast/multicast datagram%s undelivered\n");
p1a(udps_fullsock, "\t%lu dropped due to full socket buffers\n");
p1a(udpps_pcbhashmiss, "\t%lu not for hashed pcb\n");
delivered = udpstat.udps_ipackets -
udpstat.udps_hdrops -
udpstat.udps_badlen -
udpstat.udps_badsum -
udpstat.udps_noport -
udpstat.udps_noportbcast -
udpstat.udps_fullsock;
if (delivered || sflag <= 1)
printf("\t%lu delivered\n", delivered);
p(udps_opackets, "\t%lu datagram%s output\n");
/* the next statistic is cumulative in udps_noportbcast */
p(udps_filtermcast,
"\t%lu time%s multicast source filter matched\n");
#undef p
#undef p1a
}
/*
* Dump CARP statistics structure.
*/
void
carp_stats(u_long off, const char *name, int af1 __unused, int proto __unused)
{
struct carpstats carpstat, zerostat;
size_t len = sizeof(struct carpstats);
if (live) {
if (zflag)
memset(&zerostat, 0, len);
if (sysctlbyname("net.inet.carp.stats", &carpstat, &len,
zflag ? &zerostat : NULL, zflag ? len : 0) < 0) {
if (errno != ENOENT)
warn("sysctl: net.inet.carp.stats");
return;
}
} else {
if (off == 0)
return;
kread(off, &carpstat, len);
}
printf("%s:\n", name);
#define p(f, m) if (carpstat.f || sflag <= 1) \
printf(m, (uintmax_t)carpstat.f, plural(carpstat.f))
#define p2(f, m) if (carpstat.f || sflag <= 1) \
printf(m, (uintmax_t)carpstat.f)
p(carps_ipackets, "\t%ju packet%s received (IPv4)\n");
p(carps_ipackets6, "\t%ju packet%s received (IPv6)\n");
p(carps_badttl, "\t\t%ju packet%s discarded for wrong TTL\n");
p(carps_hdrops, "\t\t%ju packet%s shorter than header\n");
p(carps_badsum, "\t\t%ju discarded for bad checksum%s\n");
p(carps_badver, "\t\t%ju discarded packet%s with a bad version\n");
p2(carps_badlen, "\t\t%ju discarded because packet too short\n");
p2(carps_badauth, "\t\t%ju discarded for bad authentication\n");
p2(carps_badvhid, "\t\t%ju discarded for bad vhid\n");
p2(carps_badaddrs, "\t\t%ju discarded because of a bad address list\n");
p(carps_opackets, "\t%ju packet%s sent (IPv4)\n");
p(carps_opackets6, "\t%ju packet%s sent (IPv6)\n");
p2(carps_onomem, "\t\t%ju send failed due to mbuf memory error\n");
#if notyet
p(carps_ostates, "\t\t%s state update%s sent\n");
#endif
#undef p
#undef p2
}
/*
* Dump IP statistics structure.
*/
void
ip_stats(u_long off, const char *name, int af1 __unused, int proto __unused)
{
struct ipstat ipstat, zerostat;
size_t len = sizeof ipstat;
if (live) {
if (zflag)
memset(&zerostat, 0, len);
if (sysctlbyname("net.inet.ip.stats", &ipstat, &len,
zflag ? &zerostat : NULL, zflag ? len : 0) < 0) {
warn("sysctl: net.inet.ip.stats");
return;
}
} else
kread(off, &ipstat, len);
printf("%s:\n", name);
#define p(f, m) if (ipstat.f || sflag <= 1) \
printf(m, ipstat.f, plural(ipstat.f))
#define p1a(f, m) if (ipstat.f || sflag <= 1) \
printf(m, ipstat.f)
p(ips_total, "\t%lu total packet%s received\n");
p(ips_badsum, "\t%lu bad header checksum%s\n");
p1a(ips_toosmall, "\t%lu with size smaller than minimum\n");
p1a(ips_tooshort, "\t%lu with data size < data length\n");
p1a(ips_toolong, "\t%lu with ip length > max ip packet size\n");
p1a(ips_badhlen, "\t%lu with header length < data size\n");
p1a(ips_badlen, "\t%lu with data length < header length\n");
p1a(ips_badoptions, "\t%lu with bad options\n");
p1a(ips_badvers, "\t%lu with incorrect version number\n");
p(ips_fragments, "\t%lu fragment%s received\n");
p(ips_fragdropped, "\t%lu fragment%s dropped (dup or out of space)\n");
p(ips_fragtimeout, "\t%lu fragment%s dropped after timeout\n");
p(ips_reassembled, "\t%lu packet%s reassembled ok\n");
p(ips_delivered, "\t%lu packet%s for this host\n");
p(ips_noproto, "\t%lu packet%s for unknown/unsupported protocol\n");
p(ips_forward, "\t%lu packet%s forwarded");
p(ips_fastforward, " (%lu packet%s fast forwarded)");
if (ipstat.ips_forward || sflag <= 1)
putchar('\n');
p(ips_cantforward, "\t%lu packet%s not forwardable\n");
p(ips_notmember,
"\t%lu packet%s received for unknown multicast group\n");
p(ips_redirectsent, "\t%lu redirect%s sent\n");
p(ips_localout, "\t%lu packet%s sent from this host\n");
p(ips_rawout, "\t%lu packet%s sent with fabricated ip header\n");
p(ips_odropped,
"\t%lu output packet%s dropped due to no bufs, etc.\n");
p(ips_noroute, "\t%lu output packet%s discarded due to no route\n");
p(ips_fragmented, "\t%lu output datagram%s fragmented\n");
p(ips_ofragments, "\t%lu fragment%s created\n");
p(ips_cantfrag, "\t%lu datagram%s that can't be fragmented\n");
p(ips_nogif, "\t%lu tunneling packet%s that can't find gif\n");
p(ips_badaddr, "\t%lu datagram%s with bad address in header\n");
#undef p
#undef p1a
}
/*
* Dump ARP statistics structure.
*/
void
arp_stats(u_long off, const char *name, int af1 __unused, int proto __unused)
{
struct arpstat arpstat, zerostat;
size_t len = sizeof(arpstat);
if (live) {
if (zflag)
memset(&zerostat, 0, len);
if (sysctlbyname("net.link.ether.arp.stats", &arpstat, &len,
zflag ? &zerostat : NULL, zflag ? len : 0) < 0) {
warn("sysctl: net.link.ether.arp.stats");
return;
}
} else
kread(off, &arpstat, len);
printf("%s:\n", name);
#define p(f, m) if (arpstat.f || sflag <= 1) \
printf(m, arpstat.f, plural(arpstat.f))
#define p2(f, m) if (arpstat.f || sflag <= 1) \
printf(m, arpstat.f, pluralies(arpstat.f))
p(txrequests, "\t%lu ARP request%s sent\n");
p2(txreplies, "\t%lu ARP repl%s sent\n");
p(rxrequests, "\t%lu ARP request%s received\n");
p2(rxreplies, "\t%lu ARP repl%s received\n");
p(received, "\t%lu ARP packet%s received\n");
p(dropped, "\t%lu total packet%s dropped due to no ARP entry\n");
p(timeouts, "\t%lu ARP entry%s timed out\n");
p(dupips, "\t%lu Duplicate IP%s seen\n");
#undef p
#undef p2
}
static const char *icmpnames[ICMP_MAXTYPE + 1] = {
"echo reply", /* RFC 792 */
"#1",
"#2",
"destination unreachable", /* RFC 792 */
"source quench", /* RFC 792 */
"routing redirect", /* RFC 792 */
"#6",
"#7",
"echo", /* RFC 792 */
"router advertisement", /* RFC 1256 */
"router solicitation", /* RFC 1256 */
"time exceeded", /* RFC 792 */
"parameter problem", /* RFC 792 */
"time stamp", /* RFC 792 */
"time stamp reply", /* RFC 792 */
"information request", /* RFC 792 */
"information request reply", /* RFC 792 */
"address mask request", /* RFC 950 */
"address mask reply", /* RFC 950 */
"#19",
"#20",
"#21",
"#22",
"#23",
"#24",
"#25",
"#26",
"#27",
"#28",
"#29",
"icmp traceroute", /* RFC 1393 */
"datagram conversion error", /* RFC 1475 */
"mobile host redirect",
"IPv6 where-are-you",
"IPv6 i-am-here",
"mobile registration req",
"mobile registration reply",
"domain name request", /* RFC 1788 */
"domain name reply", /* RFC 1788 */
"icmp SKIP",
"icmp photuris", /* RFC 2521 */
};
/*
* Dump ICMP statistics.
*/
void
icmp_stats(u_long off, const char *name, int af1 __unused, int proto __unused)
{
struct icmpstat icmpstat, zerostat;
int i, first;
size_t len;
len = sizeof icmpstat;
if (live) {
if (zflag)
memset(&zerostat, 0, len);
if (sysctlbyname("net.inet.icmp.stats", &icmpstat, &len,
zflag ? &zerostat : NULL, zflag ? len : 0) < 0) {
warn("sysctl: net.inet.icmp.stats");
return;
}
} else
kread(off, &icmpstat, len);
printf("%s:\n", name);
#define p(f, m) if (icmpstat.f || sflag <= 1) \
printf(m, icmpstat.f, plural(icmpstat.f))
#define p1a(f, m) if (icmpstat.f || sflag <= 1) \
printf(m, icmpstat.f)
#define p2(f, m) if (icmpstat.f || sflag <= 1) \
printf(m, icmpstat.f, plurales(icmpstat.f))
p(icps_error, "\t%lu call%s to icmp_error\n");
p(icps_oldicmp,
"\t%lu error%s not generated in response to an icmp message\n");
for (first = 1, i = 0; i < ICMP_MAXTYPE + 1; i++)
if (icmpstat.icps_outhist[i] != 0) {
if (first) {
printf("\tOutput histogram:\n");
first = 0;
}
if (icmpnames[i] != NULL)
printf("\t\t%s: %lu\n", icmpnames[i],
icmpstat.icps_outhist[i]);
else
printf("\t\tunknown ICMP #%d: %lu\n", i,
icmpstat.icps_outhist[i]);
}
p(icps_badcode, "\t%lu message%s with bad code fields\n");
p(icps_tooshort, "\t%lu message%s less than the minimum length\n");
p(icps_checksum, "\t%lu message%s with bad checksum\n");
p(icps_badlen, "\t%lu message%s with bad length\n");
p1a(icps_bmcastecho, "\t%lu multicast echo requests ignored\n");
p1a(icps_bmcasttstamp, "\t%lu multicast timestamp requests ignored\n");
for (first = 1, i = 0; i < ICMP_MAXTYPE + 1; i++)
if (icmpstat.icps_inhist[i] != 0) {
if (first) {
printf("\tInput histogram:\n");
first = 0;
}
if (icmpnames[i] != NULL)
printf("\t\t%s: %lu\n", icmpnames[i],
icmpstat.icps_inhist[i]);
else
printf("\t\tunknown ICMP #%d: %lu\n", i,
icmpstat.icps_inhist[i]);
}
p(icps_reflect, "\t%lu message response%s generated\n");
p2(icps_badaddr, "\t%lu invalid return address%s\n");
p(icps_noroute, "\t%lu no return route%s\n");
#undef p
#undef p1a
#undef p2
if (live) {
len = sizeof i;
if (sysctlbyname("net.inet.icmp.maskrepl", &i, &len, NULL, 0) <
0)
return;
printf("\tICMP address mask responses are %sabled\n",
i ? "en" : "dis");
}
}
#ifndef BURN_BRIDGES
/*
* Dump IGMP statistics structure (pre 8.x kernel).
*/
static void
igmp_stats_live_old(const char *name)
{
struct oigmpstat oigmpstat, zerostat;
size_t len = sizeof(oigmpstat);
if (zflag)
memset(&zerostat, 0, len);
if (sysctlbyname("net.inet.igmp.stats", &oigmpstat, &len,
zflag ? &zerostat : NULL, zflag ? len : 0) < 0) {
warn("sysctl: net.inet.igmp.stats");
return;
}
printf("%s:\n", name);
#define p(f, m) if (oigmpstat.f || sflag <= 1) \
printf(m, oigmpstat.f, plural(oigmpstat.f))
#define py(f, m) if (oigmpstat.f || sflag <= 1) \
printf(m, oigmpstat.f, oigmpstat.f != 1 ? "ies" : "y")
p(igps_rcv_total, "\t%u message%s received\n");
p(igps_rcv_tooshort, "\t%u message%s received with too few bytes\n");
p(igps_rcv_badsum, "\t%u message%s received with bad checksum\n");
py(igps_rcv_queries, "\t%u membership quer%s received\n");
py(igps_rcv_badqueries,
"\t%u membership quer%s received with invalid field(s)\n");
p(igps_rcv_reports, "\t%u membership report%s received\n");
p(igps_rcv_badreports,
"\t%u membership report%s received with invalid field(s)\n");
p(igps_rcv_ourreports,
"\t%u membership report%s received for groups to which we belong\n");
p(igps_snd_reports, "\t%u membership report%s sent\n");
#undef p
#undef py
}
#endif /* !BURN_BRIDGES */
/*
* Dump IGMP statistics structure.
*/
void
igmp_stats(u_long off, const char *name, int af1 __unused, int proto __unused)
{
struct igmpstat igmpstat, zerostat;
size_t len;
#ifndef BURN_BRIDGES
if (live) {
/*
* Detect if we are being run against a pre-IGMPv3 kernel.
* We cannot do this for a core file as the legacy
* struct igmpstat has no size field, nor does it
* export it in any readily-available symbols.
*/
len = 0;
if (sysctlbyname("net.inet.igmp.stats", NULL, &len, NULL,
0) < 0) {
warn("sysctl: net.inet.igmp.stats");
return;
}
if (len < sizeof(igmpstat)) {
igmp_stats_live_old(name);
return;
}
}
#endif /* !BURN_BRIDGES */
len = sizeof(igmpstat);
if (live) {
if (zflag)
memset(&zerostat, 0, len);
if (sysctlbyname("net.inet.igmp.stats", &igmpstat, &len,
zflag ? &zerostat : NULL, zflag ? len : 0) < 0) {
warn("sysctl: net.inet.igmp.stats");
return;
}
} else {
len = sizeof(igmpstat);
kread(off, &igmpstat, len);
}
if (igmpstat.igps_version != IGPS_VERSION_3) {
warnx("%s: version mismatch (%d != %d)", __func__,
igmpstat.igps_version, IGPS_VERSION_3);
}
if (igmpstat.igps_len != IGPS_VERSION3_LEN) {
warnx("%s: size mismatch (%d != %d)", __func__,
igmpstat.igps_len, IGPS_VERSION3_LEN);
}
printf("%s:\n", name);
#define p64(f, m) if (igmpstat.f || sflag <= 1) \
printf(m, (uintmax_t) igmpstat.f, plural(igmpstat.f))
#define py64(f, m) if (igmpstat.f || sflag <= 1) \
printf(m, (uintmax_t) igmpstat.f, pluralies(igmpstat.f))
p64(igps_rcv_total, "\t%ju message%s received\n");
p64(igps_rcv_tooshort, "\t%ju message%s received with too few bytes\n");
p64(igps_rcv_badttl, "\t%ju message%s received with wrong TTL\n");
p64(igps_rcv_badsum, "\t%ju message%s received with bad checksum\n");
py64(igps_rcv_v1v2_queries, "\t%ju V1/V2 membership quer%s received\n");
py64(igps_rcv_v3_queries, "\t%ju V3 membership quer%s received\n");
py64(igps_rcv_badqueries,
"\t%ju membership quer%s received with invalid field(s)\n");
py64(igps_rcv_gen_queries, "\t%ju general quer%s received\n");
py64(igps_rcv_group_queries, "\t%ju group quer%s received\n");
py64(igps_rcv_gsr_queries, "\t%ju group-source quer%s received\n");
py64(igps_drop_gsr_queries, "\t%ju group-source quer%s dropped\n");
p64(igps_rcv_reports, "\t%ju membership report%s received\n");
p64(igps_rcv_badreports,
"\t%ju membership report%s received with invalid field(s)\n");
p64(igps_rcv_ourreports,
"\t%ju membership report%s received for groups to which we belong\n");
p64(igps_rcv_nora, "\t%ju V3 report%s received without Router Alert\n");
p64(igps_snd_reports, "\t%ju membership report%s sent\n");
#undef p64
#undef py64
}
/*
* Dump PIM statistics structure.
*/
void
pim_stats(u_long off __unused, const char *name, int af1 __unused,
int proto __unused)
{
struct pimstat pimstat, zerostat;
size_t len = sizeof pimstat;
if (live) {
if (zflag)
memset(&zerostat, 0, len);
if (sysctlbyname("net.inet.pim.stats", &pimstat, &len,
zflag ? &zerostat : NULL, zflag ? len : 0) < 0) {
if (errno != ENOENT)
warn("sysctl: net.inet.pim.stats");
return;
}
} else {
if (off == 0)
return;
kread(off, &pimstat, len);
}
printf("%s:\n", name);
#define p(f, m) if (pimstat.f || sflag <= 1) \
printf(m, (uintmax_t)pimstat.f, plural(pimstat.f))
#define py(f, m) if (pimstat.f || sflag <= 1) \
printf(m, (uintmax_t)pimstat.f, pimstat.f != 1 ? "ies" : "y")
p(pims_rcv_total_msgs, "\t%ju message%s received\n");
p(pims_rcv_total_bytes, "\t%ju byte%s received\n");
p(pims_rcv_tooshort, "\t%ju message%s received with too few bytes\n");
p(pims_rcv_badsum, "\t%ju message%s received with bad checksum\n");
p(pims_rcv_badversion, "\t%ju message%s received with bad version\n");
p(pims_rcv_registers_msgs, "\t%ju data register message%s received\n");
p(pims_rcv_registers_bytes, "\t%ju data register byte%s received\n");
p(pims_rcv_registers_wrongiif,
"\t%ju data register message%s received on wrong iif\n");
p(pims_rcv_badregisters, "\t%ju bad register%s received\n");
p(pims_snd_registers_msgs, "\t%ju data register message%s sent\n");
p(pims_snd_registers_bytes, "\t%ju data register byte%s sent\n");
#undef p
#undef py
}
/*
* Pretty print an Internet address (net address + port).
*/
void
inetprint(struct in_addr *in, int port, const char *proto, int num_port)
{
struct servent *sp = 0;
char line[80], *cp;
int width;
if (Wflag)
sprintf(line, "%s.", inetname(in));
else
sprintf(line, "%.*s.", (Aflag && !num_port) ? 12 : 16, inetname(in));
cp = strchr(line, '\0');
if (!num_port && port)
sp = getservbyport((int)port, proto);
if (sp || port == 0)
sprintf(cp, "%.15s ", sp ? sp->s_name : "*");
else
sprintf(cp, "%d ", ntohs((u_short)port));
width = (Aflag && !Wflag) ? 18 : 22;
if (Wflag)
printf("%-*s ", width, line);
else
printf("%-*.*s ", width, width, line);
}
/*
* Construct an Internet address representation.
* If numeric_addr has been supplied, give
* numeric value, otherwise try for symbolic name.
*/
char *
inetname(struct in_addr *inp)
{
char *cp;
static char line[MAXHOSTNAMELEN];
struct hostent *hp;
struct netent *np;
cp = 0;
if (!numeric_addr && inp->s_addr != INADDR_ANY) {
int net = inet_netof(*inp);
int lna = inet_lnaof(*inp);
if (lna == INADDR_ANY) {
np = getnetbyaddr(net, AF_INET);
if (np)
cp = np->n_name;
}
if (cp == 0) {
hp = gethostbyaddr((char *)inp, sizeof (*inp), AF_INET);
if (hp) {
cp = hp->h_name;
trimdomain(cp, strlen(cp));
}
}
}
if (inp->s_addr == INADDR_ANY)
strcpy(line, "*");
else if (cp) {
strlcpy(line, cp, sizeof(line));
} else {
inp->s_addr = ntohl(inp->s_addr);
#define C(x) ((u_int)((x) & 0xff))
sprintf(line, "%u.%u.%u.%u", C(inp->s_addr >> 24),
C(inp->s_addr >> 16), C(inp->s_addr >> 8), C(inp->s_addr));
}
return (line);
}
Reference in New Issue View Git Blame Copy Permalink