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Power 6/32 Unix version 1.21

#ifndef lint
static char sccsid[] = "@(#)inet.c	4.14 (Berkeley) 83/09/21";
#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 <net/if.h>

#include <netdb.h>
#include <nlist.h>
#include "nstat.h"

struct	inpcb inpcb;
struct	tcpcb tcpcb;
struct	socket sock;
struct	protosw proto;

extern  long	flaggiven;
extern	int	kmem;		/* file descriptor of kmem file */
extern	char	*system;

static	int first = 1;
char	*inetname();

static	int	getvm;
struct	nlist	inetnl[] = {
#			define	N_TCB		0
	{ "_tcb" },

#			define	N_TCPSTAT	1
	{ "_tcpstat" },
#			define	N_TCPSTUDY	2
	{ "_tcpstudy" },

#			define	N_UDB		3
	{ "_udb" },
#			define	N_UDPSTAT	4
	{ "_udpstat" },

#			define	N_IPSTAT	5
	{ "_ipstat" },
#			define	N_IPINTR	6
	{ "_ipintrq" },
#			define N_IPSTUDY	7
	{ "_ipstudy" },

#			define	N_ICMPSTAT	8
	{ "_icmpstat" },

#			define	N_RAWCB		9
	{ "_rawcb" },

	{ "" },
};

struct protoy {
	u_char	pr_index;		/* index into nlist of cb head */
	u_char	pr_sindex;		/* index into nlist of stat block */
	char	*pr_name;		/* well-known name */
} protoy[] = {
	{ N_TCB,	N_TCPSTAT,		"tcp" },
	{ N_UDB,	N_UDPSTAT, 		"udp" },
	{ -1,		N_IPSTAT, 		"ip" },
	{ -1,		N_ICMPSTAT, 		"icmp" },
	{ -1,		-1,			0 }
};

/*
 * 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(name)
	char *name;
{
	off_t off = 0;
	struct inpcb cb;
	register struct inpcb *prev, *next;
	int istcp;

	struct protoy	*p;

	if (!getvm) {
		nlist(system, inetnl);
		getvm++;
	}
	for (p= &protoy[0]; p->pr_name; p++) {
		if (strcmp(p->pr_name, name) == 0) {
			off = inetnl[p->pr_index].n_value;
			break;
		}
	}
	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");
		printf(" (including servers)");
		putchar('\n');
		if (Aflag)
			printf("%-8.8s ", "PCB");
		printf("%-5.5s %-6.6s %-6.6s  %-18.18s %-18.18s %s %s\n",
			"Proto", "Recv-Q", "Send-Q",
			"Local Address", "Foreign Address", "(state)", 
/*			"(retry)");*/
			"");
		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;
		}
		klseek(kmem, (off_t)inpcb.inp_socket, 0);
		read(kmem, &sock, sizeof (sock));
		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, sock.so_rcv.sb_cc,
			sock.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]);
			/* printf(" (%d)", tcpcb.t_rxtshift); */
		}
		putchar('\n');
		if (Aflag) {
			printf("\tinpcb:%x,", next);
			if (inpcb.inp_route.ro_dst.sa_family==AF_INET) {
				struct	sockaddr_in	*sin;
				sin = (struct sockaddr_in *)&inpcb.inp_route.ro_dst;
				printf(" ro_dst:");
				inetprint(&sin->sin_addr, sin->sin_port, name);
				if (inpcb.inp_route.ro_rt)
					printrt(inpcb.inp_route.ro_rt);
			}
			putchar('\n');
			putchar('\n');
		}
		prev = next;
	}
}

/*
 * Dump TCP statistics structure.
 */
tcp_stats()
{
	off_t off;
	struct tcpstat tcpstat;
	struct tcpstudy tcpstudy;

	struct protoy	*p;
	char	*name = "tcp";

	if (!getvm) {
		nlist(system, inetnl);
		getvm++;
	}
	for (p= &protoy[0]; p->pr_name; p++) {
		if (strcmp(p->pr_name, name) == 0) {
			off = inetnl[p->pr_sindex].n_value;
			break;
		}
	}
	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 recv incomplete header%s\n",
		tcpstat.tcps_hdrops, plural(tcpstat.tcps_hdrops));
	printf("\t%d disconnect due to xmit timedout\n", tcpstat.tcps_xdrops);
	printf("\t%d bad segment%s\n",
		tcpstat.tcps_badsegs, plural(tcpstat.tcps_badsegs));
	printf("\t%d retries due to unacknowledged packet%s\n",
		tcpstat.tcps_unack, plural(tcpstat.tcps_unack));
/*
/*	if (!inetnl[N_TCPSTUDY].n_value) {
/*		printf("%sstat: symbol tcpstudy not in namelist\n",name);
/*		return;
/*	}
/*	klseek(kmem,(long)inetnl[N_TCPSTUDY].n_value, 0);
/*	read(kmem, (char *)&tcpstudy, sizeof(tcpstudy));
/*
/*	printf("\t# of Incoming Packets Dropped Due To: \n");
/*	printf("\t\taddr not in pcb: %d\n",tcpstudy.tcps_notinpcb);
/*	printf("\t\tcontrol block doesnot have tcp control block: %d\n",
/*						tcpstudy.tcps_notcpcb);
/*	printf("\t\tstate is not in sync: %d\n", tcpstudy.tcps_badstate);
/*	printf("\t\tcannot connect: %d\n", tcpstudy.tcps_noconnect);
/*	printf("\t\tack out of seq: %d\n", tcpstudy.tcps_ackoutofseq);
/*	printf("\t\tdata out of window: %d\n", tcpstudy.tcps_outwinedge);
/**/
}

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

	struct	protoy	*p;
	char	*name = "udp";

	if (!getvm) {
		nlist(system, inetnl);
		getvm++;
	}
	for (p= &protoy[0]; p->pr_name; p++) {
		if (strcmp(p->pr_name, name) == 0) {
			off = inetnl[p->pr_sindex].n_value;
			break;
		}
	}
	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_t off;
	off_t off2;
	struct ipstat ipstat;
	struct ipstudy ipstudy;
	struct	ifqueue ipint;

	struct	protoy	*p;
	char	*name	= "ip";

	if (!getvm) {
		nlist(system, inetnl);
		getvm++;
	}
	for (p= &protoy[0]; p->pr_name; p++) {
		if (strcmp(p->pr_name, name) == 0) {
			off = inetnl[p->pr_sindex].n_value;
			break;
		}
	}
	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);

/*	off2 = inetnl[N_IPINTR].n_value;
/*	if (off2 == 0) {
/*		printf("ipintrq symbol not in namelist\n");
/*		return;
/*	}
/*	klseek(kmem, off2, 0);
/*	read(kmem, (char *)&ipint, sizeof (ipint));
/*
/*	printf("\tipinput q:%d dropped due to full queue\n", ipint.ifq_drops);
/*	printf("\tipinput q:%d len \n", ipint.ifq_len);
/*	printf("\tipinput q:%d maxlen \n", ipint.ifq_maxlen);
/**/

/*	off2 = inetnl[N_IPSTUDY].n_value;
/*	if (off2==0) {
/*		printf("ipstudy symbol not in namelist\n");
/*		return;
/*	}
/*	klseek(kmem, off2, 0);
/*	read(kmem, (char *)&ipstudy, sizeof(ipstudy));
/*	printf("\tPackets Dropped Due To:\n");
/*	printf("\t\tno ifnet (use full addr) for strictroute: %d\n",
/*		ipstudy.ips_ssnoifaddr);
/*	printf("\t\tno interface (use net#) for strictroute: %d\n",
/*		ipstudy.ips_ssnoifnet);
/*	printf("\t\tbad option length: %d\n", ipstudy.ips_oplen);
/*	printf("\t\tcant tell host from net: %d\n", 
/*			ipstudy.ips_cantdiffnethost);
/*	printf("\t\ttime exceeded: %d\n", ipstudy.ips_timxceed);
/*	printf("\t\tmessage length too big: %d\n", ipstudy.ips_msgsize);
/*	printf("\t\tbad port: %d\n",ipstudy.ips_badport);
/*	printf("\t\thost or net unreached: %d\n", ipstudy.ips_unreach);
/**/
}

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_t off;
	struct icmpstat icmpstat;
	register int i, first;

	struct protoy	*p;
	char	*name = "icmp";

	if (!getvm) {
		nlist(system, inetnl);
		++getvm;
	}
	for (p= &protoy[0]; p->pr_name; p++) {
		if (strcmp(p->pr_name, name) == 0) {
			off = inetnl[p->pr_sindex].n_value;
			break;
		}
	}
	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();

	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);
}

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