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b3608ae18f
freebsd-nq/usr.bin/netstat/inet.c
Ed Schouten b3608ae18f Replace index() and rindex() calls with strchr() and strrchr(). 
The index() and rindex() functions were marked LEGACY in the 2001
revision of POSIX and were subsequently removed from the 2008 revision.
The strchr() and strrchr() functions are part of the C standard.

This makes the source code a lot more consistent, as most of these C
files also call into other str*() routines. In fact, about a dozen
already perform strchr() calls.
2012-01-03 18:51:58 +00:00

1307 lines
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/*-
* 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 " : " ";
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");
p(tcps_hc_added, "\t%lu hostcache entrie%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(u_long off, 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(off, 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);
}
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