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freebsd-skq/usr.bin/netstat/inet.c
Peter Wemm 9c437f50ee tidy up the domain name trimming code, and move it to a single place 
rather than having the same bit of code duplicated in three places,
each with their own static copy of the host's local name.
1996-01-15 02:18:35 +00:00

500 lines
15 KiB
C
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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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 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.
*/
#ifndef lint
static char sccsid[] = "@(#)inet.c 8.5 (Berkeley) 5/24/95";
#endif /* not lint */
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/mbuf.h>
#include <sys/protosw.h>
#include <sys/queue.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#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/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 <netdb.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include "netstat.h"
struct inpcb inpcb;
struct tcpcb tcpcb;
struct socket sockb;
char *inetname __P((struct in_addr *));
void inetprint __P((struct in_addr *, int, char *));
/*
* 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(off, name)
u_long off;
char *name;
{
struct inpcbhead head;
register struct inpcb *prev, *next;
int istcp;
static int first = 1;
if (off == 0)
return;
istcp = strcmp(name, "tcp") == 0;
kread(off, (char *)&head, sizeof (struct inpcbhead));
prev = (struct inpcb *)off;
for (next = head.lh_first; next != NULL; next = inpcb.inp_list.le_next) {
if (kread((u_long)next, (char *)&inpcb, sizeof (inpcb))) {
printf("???\n");
break;
}
if (!aflag &&
inet_lnaof(inpcb.inp_laddr) == INADDR_ANY) {
prev = next;
continue;
}
if (kread((u_long)inpcb.inp_socket, (char *)&sockb, sizeof (sockb))) {
printf("???\n");
break;
};
if (istcp) {
if (kread((u_long)inpcb.inp_ppcb,
(char *)&tcpcb, sizeof (tcpcb))) {
printf("???\n");
break;
};
}
if (first) {
printf("Active Internet connections");
if (aflag)
printf(" (including servers)");
putchar('\n');
if (Aflag)
printf("%-8.8s ", "PCB");
printf(Aflag ?
"%-5.5s %-6.6s %-6.6s %-18.18s %-18.18s %s\n" :
"%-5.5s %-6.6s %-6.6s %-22.22s %-22.22s %s\n",
"Proto", "Recv-Q", "Send-Q",
"Local Address", "Foreign Address", "(state)");
first = 0;
}
if (Aflag)
if (istcp)
printf("%8x ", inpcb.inp_ppcb);
else
printf("%8x ", next);
printf("%-5.5s %6d %6d ", name, sockb.so_rcv.sb_cc,
sockb.so_snd.sb_cc);
inetprint(&inpcb.inp_laddr, (int)inpcb.inp_lport, name);
inetprint(&inpcb.inp_faddr, (int)inpcb.inp_fport, name);
if (istcp) {
if (tcpcb.t_state < 0 || tcpcb.t_state >= TCP_NSTATES)
printf(" %d", tcpcb.t_state);
else {
printf(" %s", tcpstates[tcpcb.t_state]);
#if defined(TF_NEEDSYN) && defined(TF_NEEDFIN)
/* Show T/TCP `hidden state' */
if (tcpcb.t_flags & (TF_NEEDSYN|TF_NEEDFIN))
putchar('*');
#endif /* defined(TF_NEEDSYN) && defined(TF_NEEDFIN) */
}
}
putchar('\n');
prev = next;
}
}
/*
* Dump TCP statistics structure.
*/
void
tcp_stats(off, name)
u_long off;
char *name;
{
struct tcpstat tcpstat;
if (off == 0)
return;
printf ("%s:\n", name);
kread(off, (char *)&tcpstat, sizeof (tcpstat));
#define p(f, m) if (tcpstat.f || sflag <= 1) \
printf(m, tcpstat.f, plural(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 p3(f, m) if (tcpstat.f || sflag <= 1) \
printf(m, tcpstat.f, plurales(tcpstat.f))
p(tcps_sndtotal, "\t%d packet%s sent\n");
p2(tcps_sndpack,tcps_sndbyte,
"\t\t%d data packet%s (%d byte%s)\n");
p2(tcps_sndrexmitpack, tcps_sndrexmitbyte,
"\t\t%d data packet%s (%d byte%s) retransmitted\n");
p(tcps_mturesent, "\t\t%d resend%s initiated by MTU discovery\n");
p2(tcps_sndacks, tcps_delack,
"\t\t%d ack-only packet%s (%d delayed)\n");
p(tcps_sndurg, "\t\t%d URG only packet%s\n");
p(tcps_sndprobe, "\t\t%d window probe packet%s\n");
p(tcps_sndwinup, "\t\t%d window update packet%s\n");
p(tcps_sndctrl, "\t\t%d control packet%s\n");
p(tcps_rcvtotal, "\t%d packet%s received\n");
p2(tcps_rcvackpack, tcps_rcvackbyte, "\t\t%d ack%s (for %d byte%s)\n");
p(tcps_rcvdupack, "\t\t%d duplicate ack%s\n");
p(tcps_rcvacktoomuch, "\t\t%d ack%s for unsent data\n");
p2(tcps_rcvpack, tcps_rcvbyte,
"\t\t%d packet%s (%d byte%s) received in-sequence\n");
p2(tcps_rcvduppack, tcps_rcvdupbyte,
"\t\t%d completely duplicate packet%s (%d byte%s)\n");
p(tcps_pawsdrop, "\t\t%d old duplicate packet%s\n");
p2(tcps_rcvpartduppack, tcps_rcvpartdupbyte,
"\t\t%d packet%s with some dup. data (%d byte%s duped)\n");
p2(tcps_rcvoopack, tcps_rcvoobyte,
"\t\t%d out-of-order packet%s (%d byte%s)\n");
p2(tcps_rcvpackafterwin, tcps_rcvbyteafterwin,
"\t\t%d packet%s (%d byte%s) of data after window\n");
p(tcps_rcvwinprobe, "\t\t%d window probe%s\n");
p(tcps_rcvwinupd, "\t\t%d window update packet%s\n");
p(tcps_rcvafterclose, "\t\t%d packet%s received after close\n");
p(tcps_rcvbadsum, "\t\t%d discarded for bad checksum%s\n");
p(tcps_rcvbadoff, "\t\t%d discarded for bad header offset field%s\n");
p(tcps_rcvshort, "\t\t%d discarded because packet too short\n");
p(tcps_connattempt, "\t%d connection request%s\n");
p(tcps_accepts, "\t%d connection accept%s\n");
p(tcps_badsyn, "\t%d bad connection attempt%s\n");
p(tcps_connects, "\t%d connection%s established (including accepts)\n");
p2(tcps_closed, tcps_drops,
"\t%d connection%s closed (including %d drop%s)\n");
p(tcps_cachedrtt, "\t\t%d connection%s updated cached RTT on close\n");
p(tcps_cachedrttvar,
"\t\t%d connection%s updated cached RTT variance on close\n");
p(tcps_cachedssthresh,
"\t\t%d connection%s updated cached ssthresh on close\n");
p(tcps_conndrops, "\t%d embryonic connection%s dropped\n");
p2(tcps_rttupdated, tcps_segstimed,
"\t%d segment%s updated rtt (of %d attempt%s)\n");
p(tcps_rexmttimeo, "\t%d retransmit timeout%s\n");
p(tcps_timeoutdrop, "\t\t%d connection%s dropped by rexmit timeout\n");
p(tcps_persisttimeo, "\t%d persist timeout%s\n");
p(tcps_persistdrop, "\t\t%d connection%s dropped by persist timeout\n");
p(tcps_keeptimeo, "\t%d keepalive timeout%s\n");
p(tcps_keepprobe, "\t\t%d keepalive probe%s sent\n");
p(tcps_keepdrops, "\t\t%d connection%s dropped by keepalive\n");
p(tcps_predack, "\t%d correct ACK header prediction%s\n");
p(tcps_preddat, "\t%d correct data packet header prediction%s\n");
#undef p
#undef p2
#undef p3
}
/*
* Dump UDP statistics structure.
*/
void
udp_stats(off, name)
u_long off;
char *name;
{
struct udpstat udpstat;
u_long delivered;
if (off == 0)
return;
kread(off, (char *)&udpstat, sizeof (udpstat));
printf("%s:\n", name);
#define p(f, m) if (udpstat.f || sflag <= 1) \
printf(m, udpstat.f, plural(udpstat.f))
p(udps_ipackets, "\t%u datagram%s received\n");
p(udps_hdrops, "\t%u with incomplete header\n");
p(udps_badlen, "\t%u with bad data length field\n");
p(udps_badsum, "\t%u with bad checksum\n");
p(udps_noport, "\t%u dropped due to no socket\n");
p(udps_noportbcast, "\t%u broadcast/multicast datagram%s dropped due to no socket\n");
p(udps_fullsock, "\t%u dropped due to full socket buffers\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%u delivered\n", delivered);
p(udps_opackets, "\t%u datagram%s output\n");
#undef p
}
/*
* Dump IP statistics structure.
*/
void
ip_stats(off, name)
u_long off;
char *name;
{
struct ipstat ipstat;
if (off == 0)
return;
kread(off, (char *)&ipstat, sizeof (ipstat));
printf("%s:\n", name);
#define p(f, m) if (ipstat.f || sflag <= 1) \
printf(m, ipstat.f, plural(ipstat.f))
p(ips_total, "\t%u total packet%s received\n");
p(ips_badsum, "\t%u bad header checksum%s\n");
p(ips_toosmall, "\t%u with size smaller than minimum\n");
p(ips_tooshort, "\t%u with data size < data length\n");
p(ips_badhlen, "\t%u with header length < data size\n");
p(ips_badlen, "\t%u with data length < header length\n");
p(ips_badoptions, "\t%u with bad options\n");
p(ips_badvers, "\t%u with incorrect version number\n");
p(ips_fragments, "\t%u fragment%s received\n");
p(ips_fragdropped, "\t%u fragment%s dropped (dup or out of space)\n");
p(ips_fragtimeout, "\t%u fragment%s dropped after timeout\n");
p(ips_reassembled, "\t%u packet%s reassembled ok\n");
p(ips_delivered, "\t%u packet%s for this host\n");
p(ips_noproto, "\t%u packet%s for unknown/unsupported protocol\n");
p(ips_forward, "\t%u packet%s forwarded\n");
p(ips_cantforward, "\t%u packet%s not forwardable\n");
p(ips_redirectsent, "\t%u redirect%s sent\n");
p(ips_localout, "\t%u packet%s sent from this host\n");
p(ips_rawout, "\t%u packet%s sent with fabricated ip header\n");
p(ips_odropped, "\t%u output packet%s dropped due to no bufs, etc.\n");
p(ips_noroute, "\t%u output packet%s discarded due to no route\n");
p(ips_fragmented, "\t%u output datagram%s fragmented\n");
p(ips_ofragments, "\t%u fragment%s created\n");
p(ips_cantfrag, "\t%u datagram%s that can't be fragmented\n");
#undef p
}
static char *icmpnames[] = {
"echo reply",
"#1",
"#2",
"destination unreachable",
"source quench",
"routing redirect",
"#6",
"#7",
"echo",
"router advertisement",
"router solicitation",
"time exceeded",
"parameter problem",
"time stamp",
"time stamp reply",
"information request",
"information request reply",
"address mask request",
"address mask reply",
};
/*
* Dump ICMP statistics.
*/
void
icmp_stats(off, name)
u_long off;
char *name;
{
struct icmpstat icmpstat;
register int i, first;
if (off == 0)
return;
kread(off, (char *)&icmpstat, sizeof (icmpstat));
printf("%s:\n", name);
#define p(f, m) if (icmpstat.f || sflag <= 1) \
printf(m, icmpstat.f, plural(icmpstat.f))
p(icps_error, "\t%u call%s to icmp_error\n");
p(icps_oldicmp,
"\t%u error%s not generated 'cuz old message was icmp\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;
}
printf("\t\t%s: %u\n", icmpnames[i],
icmpstat.icps_outhist[i]);
}
p(icps_badcode, "\t%u message%s with bad code fields\n");
p(icps_tooshort, "\t%u message%s < minimum length\n");
p(icps_checksum, "\t%u bad checksum%s\n");
p(icps_badlen, "\t%u message%s with bad length\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;
}
printf("\t\t%s: %u\n", icmpnames[i],
icmpstat.icps_inhist[i]);
}
p(icps_reflect, "\t%u message response%s generated\n");
#undef p
}
/*
* Dump IGMP statistics structure.
*/
void
igmp_stats(off, name)
u_long off;
char *name;
{
struct igmpstat igmpstat;
if (off == 0)
return;
kread(off, (char *)&igmpstat, sizeof (igmpstat));
printf("%s:\n", name);
#define p(f, m) if (igmpstat.f || sflag <= 1) \
printf(m, igmpstat.f, plural(igmpstat.f))
#define py(f, m) if (igmpstat.f || sflag <= 1) \
printf(m, igmpstat.f, igmpstat.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
}
/*
* Pretty print an Internet address (net address + port).
* If the nflag was specified, use numbers instead of names.
*/
void
inetprint(in, port, proto)
register struct in_addr *in;
int port;
char *proto;
{
struct servent *sp = 0;
char line[80], *cp;
int width;
sprintf(line, "%.*s.", (Aflag && !nflag) ? 12 : 16, inetname(in));
cp = index(line, '\0');
if (!nflag && 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 ? 18 : 22;
printf(" %-*.*s", width, width, line);
}
/*
* Construct an Internet address representation.
* If the nflag has been supplied, give
* numeric value, otherwise try for symbolic name.
*/
char *
inetname(inp)
struct in_addr *inp;
{
register char *cp;
static char line[50];
struct hostent *hp;
struct netent *np;
cp = 0;
if (!nflag && 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);
}
}
}
if (inp->s_addr == INADDR_ANY)
strcpy(line, "*");
else if (cp)
strcpy(line, cp);
else {
inp->s_addr = ntohl(inp->s_addr);
#define C(x) ((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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