usr/src/usr.bin/netstat/inet.c

/*
 * Copyright (c) 1983 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 */

#ifndef lint
static char sccsid[] = "@(#)inet.c      5.2 (Berkeley) %G%";
#endif not lint

#include <sys/types.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;
struct  protosw proto;
extern  int kmem;
extern  int Aflag;
extern  int aflag;
extern  int nflag;

static  int first = 1;
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;

        if (off == 0) {
                printf("%s control block: symbol not in namelist\n", name);
                return;
        }
        istcp = strcmp(name, "tcp") == 0;
        klseek(kmem, off, 0);
        read(kmem, &cb, sizeof (struct inpcb));
        inpcb = cb;
        prev = (struct inpcb *)off;
        if (first) {
                printf("Active 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;
        }
        while (inpcb.inp_next != (struct inpcb *)off) {
                char *cp;

                next = inpcb.inp_next;
                klseek(kmem, (off_t)next, 0);
                read(kmem, &inpcb, sizeof (inpcb));
                if (inpcb.inp_prev != prev) {
                        printf("???\n");
                        break;
                }
                if (!aflag &&
                  inet_lnaof(inpcb.inp_laddr.s_addr) == INADDR_ANY) {
                        prev = next;
                        continue;
                }
                klseek(kmem, (off_t)inpcb.inp_socket, 0);
                read(kmem, &sockb, sizeof (sockb));
                if (istcp) {
                        klseek(kmem, (off_t)inpcb.inp_ppcb, 0);
                        read(kmem, &tcpcb, sizeof (tcpcb));
                }
                if (Aflag)
                        printf("%8x ", inpcb.inp_ppcb);
                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) {
                printf("%sstat: symbol not in namelist\n", name);
                return;
        }
        klseek(kmem, off, 0);
        read(kmem, (char *)&tcpstat, sizeof (tcpstat));
        printf("%s:\n\t%d bad header checksum%s\n", name,
                tcpstat.tcps_badsum, plural(tcpstat.tcps_badsum));
        printf("\t%d bad header offset field%s\n",
                tcpstat.tcps_badoff, plural(tcpstat.tcps_badoff));
        printf("\t%d incomplete header%s\n",
                tcpstat.tcps_hdrops, plural(tcpstat.tcps_hdrops));
#ifdef notdef
        printf("\t%d bad segment%s\n",
                tcpstat.tcps_badsegs, plural(tcpstat.badsegs));
        printf("\t%d unacknowledged packet%s\n",
                tcpstat.tcps_unack, plural(tcpstat.tcps_unack));
#endif
}

/*
 * Dump UDP statistics structure.
 */
udp_stats(off, name)
        off_t off;
        char *name;
{
        struct udpstat udpstat;

        if (off == 0) {
                printf("%sstat: symbol not in namelist\n", name);
                return;
        }
        klseek(kmem, off, 0);
        read(kmem, (char *)&udpstat, sizeof (udpstat));
        printf("%s:\n\t%d bad header checksum%s\n", name,
                udpstat.udps_badsum, plural(udpstat.udps_badsum));
        printf("\t%d incomplete header%s\n",
                udpstat.udps_hdrops, plural(udpstat.udps_hdrops));
        printf("\t%d bad data length field%s\n",
                udpstat.udps_badlen, plural(udpstat.udps_badlen));
}

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

        if (off == 0) {
                printf("%sstat: symbol not in namelist\n", name);
                return;
        }
        klseek(kmem, off, 0);
        read(kmem, (char *)&ipstat, sizeof (ipstat));
        printf("%s:\n\t%d bad header checksum%s\n", name,
                ipstat.ips_badsum, plural(ipstat.ips_badsum));
        printf("\t%d with size smaller than minimum\n", ipstat.ips_tooshort);
        printf("\t%d with data size < data length\n", ipstat.ips_toosmall);
        printf("\t%d with header length < data size\n", ipstat.ips_badhlen);
        printf("\t%d with data length < header length\n", ipstat.ips_badlen);
}

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"
};

/*
 * Dump ICMP statistics.
 */
icmp_stats(off, name)
        off_t off;
        char *name;
{
        struct icmpstat icmpstat;
        register int i, first;

        if (off == 0) {
                printf("%sstat: symbol not in namelist\n", name);
                return;
        }
        klseek(kmem, off, 0);
        read(kmem, (char *)&icmpstat, sizeof (icmpstat));
        printf("%s:\n\t%d call%s to icmp_error\n", name,
                icmpstat.icps_error, plural(icmpstat.icps_error));
        printf("\t%d error%s not generated 'cuz old message too short\n",
                icmpstat.icps_oldshort, plural(icmpstat.icps_oldshort));
        printf("\t%d error%s not generated 'cuz old message was icmp\n",
                icmpstat.icps_oldicmp, plural(icmpstat.icps_oldicmp));
        for (first = 1, i = 0; i < ICMP_IREQREPLY + 1; i++)
                if (icmpstat.icps_outhist[i] != 0) {
                        if (first) {
                                printf("\tOutput histogram:\n");
                                first = 0;
                        }
                        printf("\t\t%s: %d\n", icmpnames[i],
                                icmpstat.icps_outhist[i]);
                }
        printf("\t%d message%s with bad code fields\n",
                icmpstat.icps_badcode, plural(icmpstat.icps_badcode));
        printf("\t%d message%s < minimum length\n",
                icmpstat.icps_tooshort, plural(icmpstat.icps_tooshort));
        printf("\t%d bad checksum%s\n",
                icmpstat.icps_checksum, plural(icmpstat.icps_checksum));
        printf("\t%d message%s with bad length\n",
                icmpstat.icps_badlen, plural(icmpstat.icps_badlen));
        printf("\t%d message response%s generated\n",
                icmpstat.icps_reflect, plural(icmpstat.icps_reflect));
        for (first = 1, i = 0; i < ICMP_IREQREPLY + 1; i++)
                if (icmpstat.icps_inhist[i] != 0) {
                        if (first) {
                                printf("\tInput histogram:\n");
                                first = 0;
                        }
                        printf("\t\t%s: %d\n", icmpnames[i],
                                icmpstat.icps_inhist[i]);
                }
}

/*
 * 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;
        int port;
        char *proto;
{
        struct servent *sp = 0;
        char line[80], *cp, *index();
        int width;

        sprintf(line, "%.*s.", Aflag ? 10 : 16, inetname(*in));
        cp = index(line, '\0');
        if (!nflag && port)
                sp = getservbyport(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;
{
        char *cp = 0;
        static char line[50];
        struct hostent *hp;
        struct netent *np;

        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(&in, sizeof (in), AF_INET);
                        if (hp)
                                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);
}