4.3BSD-Reno/src/usr.bin/netstat/inet.c
/*
* Copyright (c) 1983, 1988 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted provided
* that: (1) source distributions retain this entire copyright notice and
* comment, and (2) distributions including binaries display the following
* acknowledgement: ``This product includes software developed by the
* University of California, Berkeley and its contributors'' in the
* documentation or other materials provided with the distribution and in
* all advertising materials mentioning features or use of this software.
* 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifndef lint
static char sccsid[] = "@(#)inet.c 5.15 (Berkeley) 6/18/90";
#endif /* not lint */
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/mbuf.h>
#include <sys/protosw.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/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 <netdb.h>
#include <stdio.h>
#include <string.h>
struct inpcb inpcb;
struct tcpcb tcpcb;
struct socket sockb;
extern int Aflag;
extern int aflag;
extern int nflag;
extern char *plural();
char *inetname();
/*
* 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.
*/
protopr(off, name)
off_t off;
char *name;
{
struct inpcb cb;
register struct inpcb *prev, *next;
int istcp;
static int first = 1;
if (off == 0)
return;
istcp = strcmp(name, "tcp") == 0;
kvm_read(off, (char *)&cb, sizeof (struct inpcb));
inpcb = cb;
prev = (struct inpcb *)off;
if (inpcb.inp_next == (struct inpcb *)off)
return;
while (inpcb.inp_next != (struct inpcb *)off) {
next = inpcb.inp_next;
kvm_read((off_t)next, (char *)&inpcb, sizeof (inpcb));
if (inpcb.inp_prev != prev) {
printf("???\n");
break;
}
if (!aflag &&
inet_lnaof(inpcb.inp_laddr) == INADDR_ANY) {
prev = next;
continue;
}
kvm_read((off_t)inpcb.inp_socket,
(char *)&sockb, sizeof (sockb));
if (istcp) {
kvm_read((off_t)inpcb.inp_ppcb,
(char *)&tcpcb, sizeof (tcpcb));
}
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, inpcb.inp_lport, name);
inetprint(&inpcb.inp_faddr, 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]);
}
putchar('\n');
prev = next;
}
}
/*
* Dump TCP statistics structure.
*/
tcp_stats(off, name)
off_t off;
char *name;
{
struct tcpstat tcpstat;
if (off == 0)
return;
printf ("%s:\n", name);
kvm_read(off, (char *)&tcpstat, sizeof (tcpstat));
#define p(f, m) printf(m, tcpstat.f, plural(tcpstat.f))
#define p2(f1, f2, m) printf(m, tcpstat.f1, plural(tcpstat.f1), tcpstat.f2, plural(tcpstat.f2))
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");
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");
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_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_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_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");
#undef p
#undef p2
}
/*
* Dump UDP statistics structure.
*/
udp_stats(off, name)
off_t off;
char *name;
{
struct udpstat udpstat;
if (off == 0)
return;
kvm_read(off, (char *)&udpstat, sizeof (udpstat));
printf("%s:\n\t%u incomplete header%s\n", name,
udpstat.udps_hdrops, plural(udpstat.udps_hdrops));
printf("\t%u bad data length field%s\n",
udpstat.udps_badlen, plural(udpstat.udps_badlen));
printf("\t%u bad checksum%s\n",
udpstat.udps_badsum, plural(udpstat.udps_badsum));
}
/*
* Dump IP statistics structure.
*/
ip_stats(off, name)
off_t off;
char *name;
{
struct ipstat ipstat;
if (off == 0)
return;
kvm_read(off, (char *)&ipstat, sizeof (ipstat));
printf("%s:\n\t%u total packets received\n", name,
ipstat.ips_total);
printf("\t%u bad header checksum%s\n",
ipstat.ips_badsum, plural(ipstat.ips_badsum));
printf("\t%u with size smaller than minimum\n", ipstat.ips_tooshort);
printf("\t%u with data size < data length\n", ipstat.ips_toosmall);
printf("\t%u with header length < data size\n", ipstat.ips_badhlen);
printf("\t%u with data length < header length\n", ipstat.ips_badlen);
printf("\t%u fragment%s received\n",
ipstat.ips_fragments, plural(ipstat.ips_fragments));
printf("\t%u fragment%s dropped (dup or out of space)\n",
ipstat.ips_fragdropped, plural(ipstat.ips_fragdropped));
printf("\t%u fragment%s dropped after timeout\n",
ipstat.ips_fragtimeout, plural(ipstat.ips_fragtimeout));
printf("\t%u packet%s forwarded\n",
ipstat.ips_forward, plural(ipstat.ips_forward));
printf("\t%u packet%s not forwardable\n",
ipstat.ips_cantforward, plural(ipstat.ips_cantforward));
printf("\t%u redirect%s sent\n",
ipstat.ips_redirectsent, plural(ipstat.ips_redirectsent));
}
static char *icmpnames[] = {
"echo reply",
"#1",
"#2",
"destination unreachable",
"source quench",
"routing redirect",
"#6",
"#7",
"echo",
"#9",
"#10",
"time exceeded",
"parameter problem",
"time stamp",
"time stamp reply",
"information request",
"information request reply",
"address mask request",
"address mask reply",
};
/*
* Dump ICMP statistics.
*/
icmp_stats(off, name)
off_t off;
char *name;
{
struct icmpstat icmpstat;
register int i, first;
if (off == 0)
return;
kvm_read(off, (char *)&icmpstat, sizeof (icmpstat));
printf("%s:\n\t%u call%s to icmp_error\n", name,
icmpstat.icps_error, plural(icmpstat.icps_error));
printf("\t%u error%s not generated 'cuz old message was icmp\n",
icmpstat.icps_oldicmp, plural(icmpstat.icps_oldicmp));
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]);
}
printf("\t%u message%s with bad code fields\n",
icmpstat.icps_badcode, plural(icmpstat.icps_badcode));
printf("\t%u message%s < minimum length\n",
icmpstat.icps_tooshort, plural(icmpstat.icps_tooshort));
printf("\t%u bad checksum%s\n",
icmpstat.icps_checksum, plural(icmpstat.icps_checksum));
printf("\t%u message%s with bad length\n",
icmpstat.icps_badlen, plural(icmpstat.icps_badlen));
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]);
}
printf("\t%u message response%s generated\n",
icmpstat.icps_reflect, plural(icmpstat.icps_reflect));
}
/*
* Pretty print an Internet address (net address + port).
* If the nflag was specified, use numbers instead of names.
*/
inetprint(in, port, proto)
register struct in_addr *in;
u_short port;
char *proto;
{
struct servent *sp = 0;
char line[80], *cp, *index();
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, "%.8s", 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(in)
struct in_addr in;
{
register char *cp;
static char line[50];
struct hostent *hp;
struct netent *np;
static char domain[MAXHOSTNAMELEN + 1];
static int first = 1;
if (first && !nflag) {
first = 0;
if (gethostname(domain, MAXHOSTNAMELEN) == 0 &&
(cp = index(domain, '.')))
(void) strcpy(domain, cp + 1);
else
domain[0] = 0;
}
cp = 0;
if (!nflag && in.s_addr != INADDR_ANY) {
int net = inet_netof(in);
int lna = inet_lnaof(in);
if (lna == INADDR_ANY) {
np = getnetbyaddr(net, AF_INET);
if (np)
cp = np->n_name;
}
if (cp == 0) {
hp = gethostbyaddr((char *)&in, sizeof (in), AF_INET);
if (hp) {
if ((cp = index(hp->h_name, '.')) &&
!strcmp(cp + 1, domain))
*cp = 0;
cp = hp->h_name;
}
}
}
if (in.s_addr == INADDR_ANY)
strcpy(line, "*");
else if (cp)
strcpy(line, cp);
else {
in.s_addr = ntohl(in.s_addr);
#define C(x) ((x) & 0xff)
sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24),
C(in.s_addr >> 16), C(in.s_addr >> 8), C(in.s_addr));
}
return (line);
}