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

/*
 * Copyright (c) 1980 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[] = "@(#)netstat.c	5.2 (Berkeley) %G%";
#endif not lint

/*
 * netstat
 */
#include "systat.h"

#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/mbuf.h>
#include <sys/protosw.h>

#include <net/route.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>

#define	streq(a,b)	(strcmp(a,b)==0)
#define	YMAX(w)		((w)->_maxy-1)

WINDOW *
opennetstat()
{

	sethostent(1);
	setnetent(1);
	return (subwin(stdscr, LINES-5-1, 0, 5, 0));
}

struct netinfo {
	struct	netinfo *ni_forw, *ni_prev;
	short	ni_line;		/* line on screen */
	short	ni_seen;		/* 0 when not present in list */
	short	ni_flags;
#define	NIF_LACHG	0x1		/* local address changed */
#define	NIF_FACHG	0x2		/* foreign address changed */
	short	ni_state;		/* tcp state */
	char	*ni_proto;		/* protocol */
	struct	in_addr ni_laddr;	/* local address */
	long	ni_lport;		/* local port */
	struct	in_addr	ni_faddr;	/* foreign address */
	long	ni_fport;		/* foreign port */
	long	ni_rcvcc;		/* rcv buffer character count */
	long	ni_sndcc;		/* snd buffer character count */
};

static struct {
	struct	netinfo *ni_forw, *ni_prev;
} netcb;

static	int aflag = 0;
static	int nflag = 0;
static	int lastrow = 1;
static	char *inetname();

closenetstat(w)
        WINDOW *w;
{
	register struct netinfo *p;

	endhostent();
	endnetent();
	p = netcb.ni_forw;
	while (p != (struct netinfo *)&netcb) {
		if (p->ni_line != -1)
			lastrow--;
		p->ni_line = -1;
		p = p->ni_forw;
	}
        if (w != NULL) {
		wclear(w);
		wrefresh(w);
		delwin(w);
	}
}

static struct nlist nlst[] = {
#define	X_TCB	0
	{ "_tcb" },
#define	X_UDB	1
	{ "_udb" },
        { "" },
};

initnetstat()
{

	nlist("/vmunix", nlst);
	if (nlst[X_TCB].n_value == 0) {
		error("No symbols in namelist");
		return(0);
	}
	netcb.ni_forw = netcb.ni_prev = (struct netinfo *)&netcb;
	protos = TCP|UDP;
	return(1);
}

fetchnetstat()
{
	register struct inpcb *prev, *next;
	register struct netinfo *p;
	struct inpcb inpcb;
	struct socket sockb;
	struct tcpcb tcpcb;
	off_t off;
	int istcp;

	if (nlst[X_TCB].n_value == 0)
		return;
	for (p = netcb.ni_forw; p != (struct netinfo *)&netcb; p = p->ni_forw)
		p->ni_seen = 0;
	if (protos == 0)
		error("No protocols to display");
	if (protos&TCP)
		off = nlst[X_TCB].n_value, istcp = 1;
	else if (protos&UDP)
		off = nlst[X_UDB].n_value, istcp = 0;
again:
	lseek(kmem, off, L_SET);
	read(kmem, &inpcb, sizeof (struct inpcb));
	prev = (struct inpcb *)off;
	for (; inpcb.inp_next != (struct inpcb *)off; prev = next) {
		next = inpcb.inp_next;
		lseek(kmem, (off_t)next, L_SET);
		read(kmem, &inpcb, sizeof (inpcb));
		if (inpcb.inp_prev != prev) {
			p = netcb.ni_forw;
			for (; p != (struct netinfo *)&netcb; p = p->ni_forw)
				p->ni_seen = 1;
			error("Kernel state in transition");
			return;
		}
		if (!aflag && inet_lnaof(inpcb.inp_laddr) == INADDR_ANY)
			continue;
		if (nhosts && !checkhost(&inpcb))
			continue;
		if (nports && !checkport(&inpcb))
			continue;
		lseek(kmem, (off_t)inpcb.inp_socket, L_SET);
		read(kmem, &sockb, sizeof (sockb));
		lseek(kmem, (off_t)inpcb.inp_ppcb, L_SET);
		if (istcp) {
			read(kmem, &tcpcb, sizeof (tcpcb));
			enter(&inpcb, &sockb, tcpcb.t_state, "tcp");
		} else
			enter(&inpcb, &sockb, 0, "udp");
	}
	if (istcp && (protos&UDP)) {
		istcp = 0;
		off = nlst[X_UDB].n_value;
		goto again;
	}
}

static
enter(inp, so, state, proto)
	register struct inpcb *inp;
	register struct socket *so;
	int state;
	char *proto;
{
	register struct netinfo *p;

	/*
	 * Only take exact matches, any sockets with
	 * previously unbound addresses will be deleted
	 * below in the display routine because they
	 * will appear as ``not seen'' in the kernel
	 * data structures.
	 */
	for (p = netcb.ni_forw; p != (struct netinfo *)&netcb; p = p->ni_forw) {
		if (!streq(proto, p->ni_proto))
			continue;
		if (p->ni_lport != inp->inp_lport ||
		    p->ni_laddr.s_addr != inp->inp_laddr.s_addr)
			continue;
		if (p->ni_faddr.s_addr == inp->inp_faddr.s_addr &&
		    p->ni_fport == inp->inp_fport)
			break;
	}
	if (p == (struct netinfo *)&netcb) {
		p = (struct netinfo *)malloc(sizeof (*p));
		if (p == 0) {
			error("Out of memory");
			return;
		}
		insque(p, &netcb);
		p->ni_line = -1;
		p->ni_laddr = inp->inp_laddr;
		p->ni_lport = inp->inp_lport;
		p->ni_faddr = inp->inp_faddr;
		p->ni_fport = inp->inp_fport;
		p->ni_proto = proto;
		p->ni_flags = NIF_LACHG|NIF_FACHG;
	}
	p->ni_rcvcc = so->so_rcv.sb_cc;
	p->ni_sndcc = so->so_snd.sb_cc;
	p->ni_state = state;
	p->ni_seen = 1;
}

/* column locations */
#define	LADDR	0
#define	FADDR	LADDR+23
#define	PROTO	FADDR+23
#define	RCVCC	PROTO+6
#define	SNDCC	RCVCC+7
#define	STATE	SNDCC+7

labelnetstat()
{

        if (nlst[X_TCB].n_type == 0)
                return;
        wmove(wnd, 0, 0); wclrtobot(wnd);
	mvwaddstr(wnd, 0, LADDR, "Local Address");
	mvwaddstr(wnd, 0, FADDR, "Foreign Address");
	mvwaddstr(wnd, 0, PROTO, "Proto");
	mvwaddstr(wnd, 0, RCVCC, "Recv-Q");
	mvwaddstr(wnd, 0, SNDCC, "Send-Q");
	mvwaddstr(wnd, 0, STATE, "(state)"); 
}

shownetstat()
{
	register struct netinfo *p, *q;

	/*
	 * First, delete any connections that have gone
	 * away and adjust the position of connections
	 * below to reflect the deleted line.
	 */
	p = netcb.ni_forw;
	while (p != (struct netinfo *)&netcb) {
		if (p->ni_line == -1 || p->ni_seen) {
			p = p->ni_forw;
			continue;
		}
		wmove(wnd, p->ni_line, 0); wdeleteln(wnd);
		q = netcb.ni_forw;
		for (; q != (struct netinfo *)&netcb; q = q->ni_forw)
			if (q != p && q->ni_line > p->ni_line) {
				q->ni_line--;
				/* this shouldn't be necessary */
				q->ni_flags |= NIF_LACHG|NIF_FACHG;
			}
		lastrow--;
		q = p->ni_forw;
		remque(p);
		free((char *)p);
		p = q;
	}
	/*
	 * Update existing connections and add new ones.
	 */
	for (p = netcb.ni_forw; p != (struct netinfo *)&netcb; p = p->ni_forw) {
		if (p->ni_line == -1) {
			/*
			 * Add a new entry if possible.
			 */
			if (lastrow > YMAX(wnd))
				continue;
			p->ni_line = lastrow++;
			p->ni_flags |= NIF_LACHG|NIF_FACHG;
		}
		if (p->ni_flags & NIF_LACHG) {
			wmove(wnd, p->ni_line, LADDR);
			inetprint(&p->ni_laddr, p->ni_lport, p->ni_proto);
			p->ni_flags &= ~NIF_LACHG;
		}
		if (p->ni_flags & NIF_FACHG) {
			wmove(wnd, p->ni_line, FADDR);
			inetprint(&p->ni_faddr, p->ni_fport, p->ni_proto);
			p->ni_flags &= ~NIF_FACHG;
		}
		mvwaddstr(wnd, p->ni_line, PROTO, p->ni_proto);
		mvwprintw(wnd, p->ni_line, RCVCC, "%6d", p->ni_rcvcc);
		mvwprintw(wnd, p->ni_line, SNDCC, "%6d", p->ni_sndcc);
		if (streq(p->ni_proto, "tcp"))
			if (p->ni_state < 0 || p->ni_state >= TCP_NSTATES)
				mvwprintw(wnd, p->ni_line, STATE, "%d",
				    p->ni_state);
			else
				mvwaddstr(wnd, p->ni_line, STATE,
				    tcpstates[p->ni_state]);
		wclrtoeol(wnd);
	}
	if (lastrow < YMAX(wnd)) {
		wmove(wnd, lastrow, 0); wclrtobot(wnd);
		wmove(wnd, YMAX(wnd), 0); wdeleteln(wnd);	/* XXX */
	}
}

/*
 * Pretty print an Internet address (net address + port).
 * If the nflag was specified, use numbers instead of names.
 */
static
inetprint(in, port, proto)
	register struct in_addr *in;
	int port;
	char *proto;
{
	struct servent *sp = 0;
	char line[80], *cp, *index();

	sprintf(line, "%.*s.", 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));
	/* pad to full column to clear any garbage */
	cp = index(line, '\0');
	while (cp - line < 22)
		*cp++ = ' ';
	*cp = '\0';
	waddstr(wnd, line);
}

/*
 * Construct an Internet address representation.
 * If the nflag has been supplied, give 
 * numeric value, otherwise try for symbolic name.
 */
static 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);
}

cmdnetstat(cmd, args)
        char *cmd, *args;
{
	register struct netinfo *p;

	if (prefix(cmd, "all")) {
		aflag = !aflag;
		goto fixup;
	}
	if  (prefix(cmd, "numbers") || prefix(cmd, "names")) {
		int new;

		new = prefix(cmd, "numbers");
		if (new == nflag)
			return (1);
		p = netcb.ni_forw;
		for (; p != (struct netinfo *)&netcb; p = p->ni_forw) {
			if (p->ni_line == -1)
				continue;
			p->ni_flags |= NIF_LACHG|NIF_FACHG;
		}
		nflag = new;
		goto redisplay;
	}
	if (!netcmd(cmd, args))
		return (0);
fixup:
	fetchnetstat();
redisplay:
	shownetstat();
	refresh();
	return (1);
}
Commit	Line	Data
07ed1e09 KM	1	/*
	2	* Copyright (c) 1980 Regents of the University of California.
	3	* All rights reserved. The Berkeley software License Agreement
	4	* specifies the terms and conditions for redistribution.
	5	*/
	6
9796f3aa	7	#ifndef lint
c0b7e584	8	static char sccsid[] = "@(#)netstat.c 5.2 (Berkeley) %G%";
07ed1e09	9	#endif not lint
9796f3aa SL	10
	11	/*
	12	* netstat
	13	*/
	14	#include "systat.h"
	15
9796f3aa SL	16	#include <sys/socket.h>
	17	#include <sys/socketvar.h>
	18	#include <sys/mbuf.h>
	19	#include <sys/protosw.h>
	20
	21	#include <net/route.h>
9796f3aa SL	22	#include <netinet/in_systm.h>
	23	#include <netinet/in_pcb.h>
	24	#include <netinet/ip.h>
	25	#include <netinet/ip_icmp.h>
	26	#include <netinet/icmp_var.h>
	27	#include <netinet/ip_var.h>
	28	#include <netinet/tcp.h>
	29	#include <netinet/tcpip.h>
	30	#include <netinet/tcp_seq.h>
	31	#define TCPSTATES
	32	#include <netinet/tcp_fsm.h>
	33	#include <netinet/tcp_timer.h>
	34	#include <netinet/tcp_var.h>
	35	#include <netinet/tcp_debug.h>
	36	#include <netinet/udp.h>
	37	#include <netinet/udp_var.h>
	38
	39	#define streq(a,b) (strcmp(a,b)==0)
833d578b	40	#define YMAX(w) ((w)->_maxy-1)
9796f3aa SL	41
	42	WINDOW *
	43	opennetstat()
	44	{
	45
	46	sethostent(1);
	47	setnetent(1);
	48	return (subwin(stdscr, LINES-5-1, 0, 5, 0));
	49	}
	50
	51	struct netinfo {
	52	struct netinfo ni_forw, ni_prev;
	53	short ni_line; /* line on screen */
	54	short ni_seen; /* 0 when not present in list */
	55	short ni_flags;
	56	#define NIF_LACHG 0x1 /* local address changed */
	57	#define NIF_FACHG 0x2 /* foreign address changed */
	58	short ni_state; /* tcp state */
	59	char ni_proto; / protocol */
	60	struct in_addr ni_laddr; /* local address */
	61	long ni_lport; /* local port */
	62	struct in_addr ni_faddr; /* foreign address */
	63	long ni_fport; /* foreign port */
	64	long ni_rcvcc; /* rcv buffer character count */
	65	long ni_sndcc; /* snd buffer character count */
	66	};
	67
	68	static struct {
	69	struct netinfo ni_forw, ni_prev;
	70	} netcb;
	71
	72	static int aflag = 0;
	73	static int nflag = 0;
	74	static int lastrow = 1;
	75	static char *inetname();
	76
	77	closenetstat(w)
	78	WINDOW *w;
	79	{
c0b7e584	80	register struct netinfo *p;
9796f3aa SL	81
	82	endhostent();
	83	endnetent();
	84	p = netcb.ni_forw;
	85	while (p != (struct netinfo *)&netcb) {
	86	if (p->ni_line != -1)
	87	lastrow--;
	88	p->ni_line = -1;
	89	p = p->ni_forw;
	90	}
	91	if (w != NULL) {
	92	wclear(w);
	93	wrefresh(w);
	94	delwin(w);
	95	}
	96	}
	97
	98	static struct nlist nlst[] = {
	99	#define X_TCB 0
	100	{ "_tcb" },
	101	#define X_UDB 1
	102	{ "_udb" },
	103	{ "" },
	104	};
	105
9796f3aa SL	106	initnetstat()
9796f3aa SL	107	{
9796f3aa SL	108
	109	nlist("/vmunix", nlst);
	110	if (nlst[X_TCB].n_value == 0) {
	111	error("No symbols in namelist");
c0b7e584	112	return(0);
9796f3aa SL	113	}
9796f3aa SL	114	netcb.ni_forw = netcb.ni_prev = (struct netinfo *)&netcb;
833d578b	115	protos = TCP\|UDP;
c0b7e584	116	return(1);
9796f3aa SL	117	}
	118
	119	fetchnetstat()
	120	{
	121	register struct inpcb prev, next;
	122	register struct netinfo *p;
	123	struct inpcb inpcb;
	124	struct socket sockb;
	125	struct tcpcb tcpcb;
	126	off_t off;
	127	int istcp;
	128
	129	if (nlst[X_TCB].n_value == 0)
	130	return;
	131	for (p = netcb.ni_forw; p != (struct netinfo *)&netcb; p = p->ni_forw)
	132	p->ni_seen = 0;
833d578b SL	133	if (protos == 0)
833d578b SL	134	error("No protocols to display");
9796f3aa SL	135	if (protos&TCP)
	136	off = nlst[X_TCB].n_value, istcp = 1;
	137	else if (protos&UDP)
	138	off = nlst[X_UDB].n_value, istcp = 0;
	139	again:
	140	lseek(kmem, off, L_SET);
	141	read(kmem, &inpcb, sizeof (struct inpcb));
	142	prev = (struct inpcb *)off;
	143	for (; inpcb.inp_next != (struct inpcb *)off; prev = next) {
	144	next = inpcb.inp_next;
	145	lseek(kmem, (off_t)next, L_SET);
	146	read(kmem, &inpcb, sizeof (inpcb));
	147	if (inpcb.inp_prev != prev) {
	148	p = netcb.ni_forw;
	149	for (; p != (struct netinfo *)&netcb; p = p->ni_forw)
	150	p->ni_seen = 1;
	151	error("Kernel state in transition");
	152	return;
	153	}
	154	if (!aflag && inet_lnaof(inpcb.inp_laddr) == INADDR_ANY)
	155	continue;
833d578b	156	if (nhosts && !checkhost(&inpcb))
9796f3aa	157	continue;
833d578b	158	if (nports && !checkport(&inpcb))
9796f3aa SL	159	continue;
	160	lseek(kmem, (off_t)inpcb.inp_socket, L_SET);
	161	read(kmem, &sockb, sizeof (sockb));
	162	lseek(kmem, (off_t)inpcb.inp_ppcb, L_SET);
	163	if (istcp) {
	164	read(kmem, &tcpcb, sizeof (tcpcb));
	165	enter(&inpcb, &sockb, tcpcb.t_state, "tcp");
	166	} else
	167	enter(&inpcb, &sockb, 0, "udp");
	168	}
	169	if (istcp && (protos&UDP)) {
	170	istcp = 0;
	171	off = nlst[X_UDB].n_value;
	172	goto again;
	173	}
	174	}
	175
	176	static
	177	enter(inp, so, state, proto)
	178	register struct inpcb *inp;
	179	register struct socket *so;
	180	int state;
	181	char *proto;
	182	{
833d578b	183	register struct netinfo *p;
9796f3aa SL	184
9796f3aa SL	185	/*
833d578b SL	186	* Only take exact matches, any sockets with
	187	* previously unbound addresses will be deleted
	188	* below in the display routine because they
	189	* will appear as ``not seen'' in the kernel
	190	* data structures.
9796f3aa SL	191	*/
	192	for (p = netcb.ni_forw; p != (struct netinfo *)&netcb; p = p->ni_forw) {
	193	if (!streq(proto, p->ni_proto))
	194	continue;
833d578b SL	195	if (p->ni_lport != inp->inp_lport \|\|
833d578b SL	196	p->ni_laddr.s_addr != inp->inp_laddr.s_addr)
9796f3aa	197	continue;
833d578b SL	198	if (p->ni_faddr.s_addr == inp->inp_faddr.s_addr &&
	199	p->ni_fport == inp->inp_fport)
	200	break;
9796f3aa	201	}
833d578b SL	202	if (p == (struct netinfo *)&netcb) {
	203	p = (struct netinfo )malloc(sizeof (p));
	204	if (p == 0) {
	205	error("Out of memory");
	206	return;
	207	}
	208	insque(p, &netcb);
	209	p->ni_line = -1;
	210	p->ni_laddr = inp->inp_laddr;
	211	p->ni_lport = inp->inp_lport;
	212	p->ni_faddr = inp->inp_faddr;
	213	p->ni_fport = inp->inp_fport;
	214	p->ni_proto = proto;
	215	p->ni_flags = NIF_LACHG\|NIF_FACHG;
9796f3aa	216	}
833d578b SL	217	p->ni_rcvcc = so->so_rcv.sb_cc;
	218	p->ni_sndcc = so->so_snd.sb_cc;
	219	p->ni_state = state;
	220	p->ni_seen = 1;
9796f3aa SL	221	}
	222
	223	/* column locations */
	224	#define LADDR 0
	225	#define FADDR LADDR+23
	226	#define PROTO FADDR+23
	227	#define RCVCC PROTO+6
	228	#define SNDCC RCVCC+7
	229	#define STATE SNDCC+7
	230
	231	labelnetstat()
	232	{
	233
	234	if (nlst[X_TCB].n_type == 0)
	235	return;
	236	wmove(wnd, 0, 0); wclrtobot(wnd);
	237	mvwaddstr(wnd, 0, LADDR, "Local Address");
	238	mvwaddstr(wnd, 0, FADDR, "Foreign Address");
	239	mvwaddstr(wnd, 0, PROTO, "Proto");
	240	mvwaddstr(wnd, 0, RCVCC, "Recv-Q");
	241	mvwaddstr(wnd, 0, SNDCC, "Send-Q");
	242	mvwaddstr(wnd, 0, STATE, "(state)");
	243	}
	244
	245	shownetstat()
	246	{
	247	register struct netinfo p, q;
	248
	249	/*
	250	* First, delete any connections that have gone
	251	* away and adjust the position of connections
	252	* below to reflect the deleted line.
	253	*/
	254	p = netcb.ni_forw;
	255	while (p != (struct netinfo *)&netcb) {
	256	if (p->ni_line == -1 \|\| p->ni_seen) {
	257	p = p->ni_forw;
	258	continue;
	259	}
	260	wmove(wnd, p->ni_line, 0); wdeleteln(wnd);
	261	q = netcb.ni_forw;
	262	for (; q != (struct netinfo *)&netcb; q = q->ni_forw)
833d578b	263	if (q != p && q->ni_line > p->ni_line) {
9796f3aa	264	q->ni_line--;
833d578b SL	265	/* this shouldn't be necessary */
	266	q->ni_flags \|= NIF_LACHG\|NIF_FACHG;
	267	}
9796f3aa SL	268	lastrow--;
	269	q = p->ni_forw;
	270	remque(p);
	271	free((char *)p);
	272	p = q;
	273	}
9796f3aa SL	274	/*
	275	* Update existing connections and add new ones.
	276	*/
	277	for (p = netcb.ni_forw; p != (struct netinfo *)&netcb; p = p->ni_forw) {
	278	if (p->ni_line == -1) {
	279	/*
	280	* Add a new entry if possible.
	281	*/
833d578b	282	if (lastrow > YMAX(wnd))
9796f3aa SL	283	continue;
	284	p->ni_line = lastrow++;
	285	p->ni_flags \|= NIF_LACHG\|NIF_FACHG;
	286	}
	287	if (p->ni_flags & NIF_LACHG) {
	288	wmove(wnd, p->ni_line, LADDR);
	289	inetprint(&p->ni_laddr, p->ni_lport, p->ni_proto);
	290	p->ni_flags &= ~NIF_LACHG;
	291	}
	292	if (p->ni_flags & NIF_FACHG) {
	293	wmove(wnd, p->ni_line, FADDR);
	294	inetprint(&p->ni_faddr, p->ni_fport, p->ni_proto);
	295	p->ni_flags &= ~NIF_FACHG;
	296	}
	297	mvwaddstr(wnd, p->ni_line, PROTO, p->ni_proto);
	298	mvwprintw(wnd, p->ni_line, RCVCC, "%6d", p->ni_rcvcc);
	299	mvwprintw(wnd, p->ni_line, SNDCC, "%6d", p->ni_sndcc);
	300	if (streq(p->ni_proto, "tcp"))
	301	if (p->ni_state < 0 \|\| p->ni_state >= TCP_NSTATES)
	302	mvwprintw(wnd, p->ni_line, STATE, "%d",
	303	p->ni_state);
	304	else
	305	mvwaddstr(wnd, p->ni_line, STATE,
	306	tcpstates[p->ni_state]);
	307	wclrtoeol(wnd);
	308	}
833d578b SL	309	if (lastrow < YMAX(wnd)) {
	310	wmove(wnd, lastrow, 0); wclrtobot(wnd);
	311	wmove(wnd, YMAX(wnd), 0); wdeleteln(wnd); /* XXX */
	312	}
9796f3aa SL	313	}
	314
	315	/*
	316	* Pretty print an Internet address (net address + port).
	317	* If the nflag was specified, use numbers instead of names.
	318	*/
	319	static
	320	inetprint(in, port, proto)
	321	register struct in_addr *in;
	322	int port;
	323	char *proto;
	324	{
	325	struct servent *sp = 0;
	326	char line[80], cp, index();
	327
	328	sprintf(line, "%.s.", 16, inetname(in));
	329	cp = index(line, '\0');
	330	if (!nflag && port)
	331	sp = getservbyport(port, proto);
	332	if (sp \|\| port == 0)
	333	sprintf(cp, "%.8s", sp ? sp->s_name : "*");
	334	else
	335	sprintf(cp, "%d", ntohs((u_short)port));
	336	/* pad to full column to clear any garbage */
	337	cp = index(line, '\0');
	338	while (cp - line < 22)
	339	*cp++ = ' ';
	340	*cp = '\0';
	341	waddstr(wnd, line);
	342	}
	343
	344	/*
	345	* Construct an Internet address representation.
	346	* If the nflag has been supplied, give
	347	* numeric value, otherwise try for symbolic name.
	348	*/
	349	static char *
	350	inetname(in)
	351	struct in_addr in;
	352	{
	353	char *cp = 0;
	354	static char line[50];
	355	struct hostent *hp;
	356	struct netent *np;
	357
	358	if (!nflag && in.s_addr != INADDR_ANY) {
	359	int net = inet_netof(in);
	360	int lna = inet_lnaof(in);
	361
	362	if (lna == INADDR_ANY) {
	363	np = getnetbyaddr(net, AF_INET);
	364	if (np)
	365	cp = np->n_name;
	366	}
	367	if (cp == 0) {
	368	hp = gethostbyaddr(&in, sizeof (in), AF_INET);
	369	if (hp)
	370	cp = hp->h_name;
	371	}
	372	}
	373	if (in.s_addr == INADDR_ANY)
	374	strcpy(line, "*");
	375	else if (cp)
	376	strcpy(line, cp);
377	else {
378	in.s_addr = ntohl(in.s_addr);
379	#define C(x) ((x) & 0xff)
380	sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24),
381	C(in.s_addr >> 16), C(in.s_addr >> 8), C(in.s_addr));
382	}
383	return (line);
384	}
385
386	cmdnetstat(cmd, args)
387	char cmd, args;
388	{
389	register struct netinfo *p;
9796f3aa	390
9796f3aa SL	391	if (prefix(cmd, "all")) {
	392	aflag = !aflag;
	393	goto fixup;
	394	}
	395	if (prefix(cmd, "numbers") \|\| prefix(cmd, "names")) {
	396	int new;
	397
	398	new = prefix(cmd, "numbers");
	399	if (new == nflag)
833d578b	400	return (1);
9796f3aa SL	401	p = netcb.ni_forw;
	402	for (; p != (struct netinfo *)&netcb; p = p->ni_forw) {
	403	if (p->ni_line == -1)
	404	continue;
	405	p->ni_flags \|= NIF_LACHG\|NIF_FACHG;
	406	}
	407	nflag = new;
	408	goto redisplay;
	409	}
833d578b SL	410	if (!netcmd(cmd, args))
833d578b SL	411	return (0);
9796f3aa SL	412	fixup:
	413	fetchnetstat();
	414	redisplay:
	415	shownetstat();
	416	refresh();
9796f3aa SL	417	return (1);
9796f3aa SL	418	}