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 this notice is preserved and that due credit is given
 * to the University of California at Berkeley. The name of the University
 * may not be used to endorse or promote products derived from this
 * software without specific prior written permission. This software
 * is provided ``as is'' without express or implied warranty.
 */

#ifndef lint
static char sccsid[] = "@(#)inet.c      5.9.1.1 (Berkeley) 2/7/88";
#endif not lint

#include <strings.h>
#include <stdio.h>

#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/in_pcb.h>
#include <netinet/ip.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>

struct  inpcb inpcb;
struct  tcpcb tcpcb;
struct  socket sockb;
extern  int kmem;
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;
        klseek(kmem, off, 0);
        read(kmem, (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;
                klseek(kmem, (off_t)next, 0);
                read(kmem, (char *)&inpcb, sizeof (inpcb));
                if (inpcb.inp_prev != prev) {
                        printf("???\n");
                        break;
                }
                if (!aflag &&
                  inet_lnaof(inpcb.inp_laddr) == INADDR_ANY) {
                        prev = next;
                        continue;
                }
                klseek(kmem, (off_t)inpcb.inp_socket, 0);
                read(kmem, (char *)&sockb, sizeof (sockb));
                if (istcp) {
                        klseek(kmem, (off_t)inpcb.inp_ppcb, 0);
                        read(kmem, (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);
        klseek(kmem, off, 0);
        read(kmem, (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;
        klseek(kmem, off, 0);
        read(kmem, (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));
#ifdef sun
        printf("\t%d socket overflow%s\n",
                udpstat.udps_fullsock, plural(udpstat.udps_fullsock));
#endif
}

/*
 * Dump IP statistics structure.
 */
ip_stats(off, name)
        off_t off;
        char *name;
{
        struct ipstat ipstat;

        if (off == 0)
                return;
        klseek(kmem, off, 0);
        read(kmem, (char *)&ipstat, sizeof (ipstat));
#if BSD>=43
        printf("%s:\n\t%u total packets received\n", name,
                ipstat.ips_total);
#endif
        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);
#if BSD>=43
        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));
#endif
}

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;
        klseek(kmem, off, 0);
        read(kmem, (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);
}