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[unix-history] / usr / src / usr.bin / netstat / inet.c

#ifndef lint
static char sccsid[] = "@(#)inet.c      4.10 83/03/11";
#endif

#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 socket;
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("%-5.5s %-6.6s %-6.6s  %-18.18s %-18.18s %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, &socket, sizeof (socket));
               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, socket.so_rcv.sb_cc,
                       socket.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 checksums\n", name, tcpstat.tcps_badsum);
       printf("\t%d bad header offset fields\n", tcpstat.tcps_badoff);
       printf("\t%d incomplete headers\n", tcpstat.tcps_hdrops);
#ifdef notdef
       printf("\t%d bad segments\n", tcpstat.tcps_badsegs);
       printf("\t%d unacknowledged packets\n", 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 checksums\n", name, udpstat.udps_badsum);
       printf("\t%d incomplete headers\n", udpstat.udps_hdrops);
       printf("\t%d bad data length fields\n", 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 checksums\n", name, ipstat.ips_badsum);
       printf("\t%d packet size smaller than minimum\n",
               ipstat.ips_tooshort);
       printf("\t%d data size < data length\n", ipstat.ips_toosmall);
       printf("\t%d header length < data size\n", ipstat.ips_badhlen);
       printf("\t%d 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 calls to icmp_error\n", name, icmpstat.icps_error);
       printf("\t%d errors not generated 'cuz old message too short\n",
               icmpstat.icps_oldshort);
       printf("\t%d errors not generated 'cuz old message was icmp\n",
               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 messages < minimum length\n", icmpstat.icps_tooshort);
       printf("\t%d bad checksums\n", icmpstat.icps_checksum);
       printf("\t%d messages with bad length\n", icmpstat.icps_badlen);
       printf("\t%d messages responses generated\n", 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();

       sprintf(line, "%.10s.", 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));
       printf(" %-18.18s", 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];

       if (!nflag) {
               if (inet_lnaof(in) == INADDR_ANY) {
                       struct netent *np;

                       np = getnetbyaddr(inet_netof(in), AF_INET);
                       if (np)
                               cp = np->n_name;
               } else {
                       struct hostent *hp;

                       hp = gethostbyaddr(&in, sizeof (struct in_addr),
                               AF_INET);
                       if (hp)
                               cp = hp->h_name;
               }
       }
       if (in.s_addr == INADDR_ANY)
               strcpy(line, "*");
       else if (cp)
               strcpy(line, cp);
       else {
               u_char *ucp = (u_char *)&in;
               sprintf(line, "%u.%u.%u.%u", ucp[0], ucp[1], ucp[2], ucp[3]);
       }
       return (line);
}