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

/*-
 * Copyright (c) 1980, 1992 The Regents of the University of California.
 * All rights reserved.
 *
 * %sccs.include.redist.c%
 */

#ifndef lint
static char sccsid[] = "@(#)netstat.c	5.12 (Berkeley) %G%";
#endif /* not lint */

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

#include <netinet/in.h>
#include <net/route.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/in_pcb.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>
#include <stdlib.h>
#include <string.h>
#include <nlist.h>
#include <paths.h>
#include "systat.h"
#include "extern.h"

static void enter __P((struct inpcb *, struct socket *, int, char *));
static char *inetname __P((struct in_addr));
static void inetprint __P((struct in_addr *, int, char *));

#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	void enter(), inetprint();
static	char *inetname();

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

	endhostent();
	endnetent();
	p = (struct netinfo *)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 namelist[] = {
#define	X_TCB	0
	{ "_tcb" },
#define	X_UDB	1
	{ "_udb" },
	{ "" },
};

int
initnetstat()
{
	if (kvm_nlist(kd, namelist)) {
		nlisterr(namelist);
		return(0);
	}
	if (namelist[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);
}

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

	if (namelist[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&TCP) {
		off = NPTR(X_TCB); 
		istcp = 1;
	}
	else if (protos&UDP) {
		off = NPTR(X_UDB); 
		istcp = 0;
	}
	else {
		error("No protocols to display");
		return;
	}
again:
	KREAD(off, &inpcb, sizeof (struct inpcb));
	prev = off;
	for (; inpcb.inp_next != off; prev = next) {
		next = inpcb.inp_next;
		KREAD(next, &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;
		KREAD(inpcb.inp_socket, &sockb, sizeof (sockb));
		if (istcp) {
			KREAD(inpcb.inp_ppcb, &tcpcb, sizeof (tcpcb));
			enter(&inpcb, &sockb, tcpcb.t_state, "tcp");
		} else
			enter(&inpcb, &sockb, 0, "udp");
	}
	if (istcp && (protos&UDP)) {
		istcp = 0;
		off = NPTR(X_UDB);
		goto again;
	}
}

static void
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) {
		if ((p = malloc(sizeof(*p))) == NULL) {
			error("Out of memory");
			return;
		}
		p->ni_prev = (struct netinfo *)&netcb;
		p->ni_forw = netcb.ni_forw;
		netcb.ni_forw->ni_prev = p;
		netcb.ni_forw = p;
		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


void
labelnetstat()
{
	if (namelist[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)"); 
}

void
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;
		p->ni_prev->ni_forw = p->ni_forw;
		p->ni_forw->ni_prev = p->ni_prev;
		free(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 void
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((char *)&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);
}

int
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
6a4aa0a8 KB	1	/*-
	2	* Copyright (c) 1980, 1992 The Regents of the University of California.
	3	* All rights reserved.
	4	*
1e3c68be	5	* %sccs.include.redist.c%
07ed1e09 KM	6	*/
07ed1e09 KM	7
9796f3aa	8	#ifndef lint
1e3c68be	9	static char sccsid[] = "@(#)netstat.c 5.12 (Berkeley) %G%";
6a4aa0a8	10	#endif /* not lint */
9796f3aa SL	11
	12	/*
	13	* netstat
	14	*/
6a4aa0a8	15	#include <sys/param.h>
9796f3aa SL	16	#include <sys/socket.h>
	17	#include <sys/socketvar.h>
	18	#include <sys/mbuf.h>
	19	#include <sys/protosw.h>
	20
6a4aa0a8	21	#include <netinet/in.h>
9796f3aa	22	#include <net/route.h>
9796f3aa	23	#include <netinet/in_systm.h>
9796f3aa	24	#include <netinet/ip.h>
5062575e	25	#include <netinet/in_pcb.h>
9796f3aa SL	26	#include <netinet/ip_icmp.h>
	27	#include <netinet/icmp_var.h>
	28	#include <netinet/ip_var.h>
	29	#include <netinet/tcp.h>
	30	#include <netinet/tcpip.h>
	31	#include <netinet/tcp_seq.h>
	32	#define TCPSTATES
	33	#include <netinet/tcp_fsm.h>
	34	#include <netinet/tcp_timer.h>
	35	#include <netinet/tcp_var.h>
	36	#include <netinet/tcp_debug.h>
	37	#include <netinet/udp.h>
	38	#include <netinet/udp_var.h>
6a4aa0a8 KB	39
	40	#include <netdb.h>
	41	#include <stdlib.h>
	42	#include <string.h>
	43	#include <nlist.h>
eef33ea7	44	#include <paths.h>
6a4aa0a8 KB	45	#include "systat.h"
	46	#include "extern.h"
	47
	48	static void enter __P((struct inpcb , struct socket , int, char *));
	49	static char *inetname __P((struct in_addr));
	50	static void inetprint __P((struct in_addr , int, char ));
9796f3aa SL	51
9796f3aa SL	52	#define streq(a,b) (strcmp(a,b)==0)
edfbb71e	53	#define YMAX(w) ((w)->maxy-1)
9796f3aa SL	54
	55	WINDOW *
	56	opennetstat()
	57	{
9796f3aa SL	58	sethostent(1);
	59	setnetent(1);
	60	return (subwin(stdscr, LINES-5-1, 0, 5, 0));
	61	}
	62
	63	struct netinfo {
	64	struct netinfo ni_forw, ni_prev;
	65	short ni_line; /* line on screen */
	66	short ni_seen; /* 0 when not present in list */
	67	short ni_flags;
	68	#define NIF_LACHG 0x1 /* local address changed */
	69	#define NIF_FACHG 0x2 /* foreign address changed */
	70	short ni_state; /* tcp state */
	71	char ni_proto; / protocol */
	72	struct in_addr ni_laddr; /* local address */
	73	long ni_lport; /* local port */
	74	struct in_addr ni_faddr; /* foreign address */
	75	long ni_fport; /* foreign port */
	76	long ni_rcvcc; /* rcv buffer character count */
	77	long ni_sndcc; /* snd buffer character count */
	78	};
	79
	80	static struct {
	81	struct netinfo ni_forw, ni_prev;
	82	} netcb;
	83
	84	static int aflag = 0;
	85	static int nflag = 0;
	86	static int lastrow = 1;
591f9018	87	static void enter(), inetprint();
9796f3aa SL	88	static char *inetname();
9796f3aa SL	89
6a4aa0a8	90	void
9796f3aa SL	91	closenetstat(w)
	92	WINDOW *w;
	93	{
c0b7e584	94	register struct netinfo *p;
9796f3aa SL	95
	96	endhostent();
	97	endnetent();
a4e6a87f	98	p = (struct netinfo *)netcb.ni_forw;
9796f3aa SL	99	while (p != (struct netinfo *)&netcb) {
	100	if (p->ni_line != -1)
	101	lastrow--;
	102	p->ni_line = -1;
	103	p = p->ni_forw;
	104	}
	105	if (w != NULL) {
	106	wclear(w);
	107	wrefresh(w);
	108	delwin(w);
	109	}
	110	}
	111
86923762	112	static struct nlist namelist[] = {
9796f3aa SL	113	#define X_TCB 0
	114	{ "_tcb" },
	115	#define X_UDB 1
	116	{ "_udb" },
eef33ea7	117	{ "" },
9796f3aa SL	118	};
9796f3aa SL	119
6a4aa0a8	120	int
9796f3aa SL	121	initnetstat()
9796f3aa SL	122	{
86923762 KB	123	if (kvm_nlist(kd, namelist)) {
86923762 KB	124	nlisterr(namelist);
6a4aa0a8 KB	125	return(0);
6a4aa0a8 KB	126	}
86923762	127	if (namelist[X_TCB].n_value == 0) {
9796f3aa	128	error("No symbols in namelist");
c0b7e584	129	return(0);
9796f3aa SL	130	}
9796f3aa SL	131	netcb.ni_forw = netcb.ni_prev = (struct netinfo *)&netcb;
833d578b	132	protos = TCP\|UDP;
c0b7e584	133	return(1);
9796f3aa SL	134	}
9796f3aa SL	135
6a4aa0a8	136	void
9796f3aa SL	137	fetchnetstat()
	138	{
	139	register struct inpcb prev, next;
	140	register struct netinfo *p;
	141	struct inpcb inpcb;
	142	struct socket sockb;
	143	struct tcpcb tcpcb;
142cb8a1	144	void *off;
9796f3aa SL	145	int istcp;
9796f3aa SL	146
86923762	147	if (namelist[X_TCB].n_value == 0)
9796f3aa SL	148	return;
	149	for (p = netcb.ni_forw; p != (struct netinfo *)&netcb; p = p->ni_forw)
	150	p->ni_seen = 0;
142cb8a1 MT	151	if (protos&TCP) {
	152	off = NPTR(X_TCB);
	153	istcp = 1;
	154	}
	155	else if (protos&UDP) {
	156	off = NPTR(X_UDB);
	157	istcp = 0;
	158	}
591f9018 CT	159	else {
	160	error("No protocols to display");
	161	return;
	162	}
9796f3aa	163	again:
142cb8a1 MT	164	KREAD(off, &inpcb, sizeof (struct inpcb));
	165	prev = off;
	166	for (; inpcb.inp_next != off; prev = next) {
9796f3aa	167	next = inpcb.inp_next;
142cb8a1	168	KREAD(next, &inpcb, sizeof (inpcb));
9796f3aa SL	169	if (inpcb.inp_prev != prev) {
	170	p = netcb.ni_forw;
	171	for (; p != (struct netinfo *)&netcb; p = p->ni_forw)
	172	p->ni_seen = 1;
	173	error("Kernel state in transition");
	174	return;
	175	}
	176	if (!aflag && inet_lnaof(inpcb.inp_laddr) == INADDR_ANY)
	177	continue;
833d578b	178	if (nhosts && !checkhost(&inpcb))
9796f3aa	179	continue;
833d578b	180	if (nports && !checkport(&inpcb))
9796f3aa	181	continue;
142cb8a1	182	KREAD(inpcb.inp_socket, &sockb, sizeof (sockb));
9796f3aa	183	if (istcp) {
142cb8a1	184	KREAD(inpcb.inp_ppcb, &tcpcb, sizeof (tcpcb));
9796f3aa SL	185	enter(&inpcb, &sockb, tcpcb.t_state, "tcp");
	186	} else
	187	enter(&inpcb, &sockb, 0, "udp");
	188	}
	189	if (istcp && (protos&UDP)) {
	190	istcp = 0;
142cb8a1	191	off = NPTR(X_UDB);
9796f3aa SL	192	goto again;
	193	}
	194	}
	195
591f9018	196	static void
9796f3aa SL	197	enter(inp, so, state, proto)
	198	register struct inpcb *inp;
	199	register struct socket *so;
	200	int state;
	201	char *proto;
	202	{
833d578b	203	register struct netinfo *p;
9796f3aa SL	204
9796f3aa SL	205	/*
833d578b SL	206	* Only take exact matches, any sockets with
	207	* previously unbound addresses will be deleted
	208	* below in the display routine because they
	209	* will appear as ``not seen'' in the kernel
	210	* data structures.
9796f3aa SL	211	*/
	212	for (p = netcb.ni_forw; p != (struct netinfo *)&netcb; p = p->ni_forw) {
	213	if (!streq(proto, p->ni_proto))
	214	continue;
833d578b SL	215	if (p->ni_lport != inp->inp_lport \|\|
833d578b SL	216	p->ni_laddr.s_addr != inp->inp_laddr.s_addr)
9796f3aa	217	continue;
833d578b SL	218	if (p->ni_faddr.s_addr == inp->inp_faddr.s_addr &&
	219	p->ni_fport == inp->inp_fport)
	220	break;
9796f3aa	221	}
833d578b	222	if (p == (struct netinfo *)&netcb) {
a4e6a87f	223	if ((p = malloc(sizeof(*p))) == NULL) {
833d578b SL	224	error("Out of memory");
	225	return;
	226	}
a4e6a87f KB	227	p->ni_prev = (struct netinfo *)&netcb;
	228	p->ni_forw = netcb.ni_forw;
	229	netcb.ni_forw->ni_prev = p;
	230	netcb.ni_forw = p;
833d578b SL	231	p->ni_line = -1;
	232	p->ni_laddr = inp->inp_laddr;
	233	p->ni_lport = inp->inp_lport;
	234	p->ni_faddr = inp->inp_faddr;
	235	p->ni_fport = inp->inp_fport;
	236	p->ni_proto = proto;
	237	p->ni_flags = NIF_LACHG\|NIF_FACHG;
9796f3aa	238	}
833d578b SL	239	p->ni_rcvcc = so->so_rcv.sb_cc;
	240	p->ni_sndcc = so->so_snd.sb_cc;
	241	p->ni_state = state;
	242	p->ni_seen = 1;
9796f3aa SL	243	}
	244
	245	/* column locations */
	246	#define LADDR 0
	247	#define FADDR LADDR+23
	248	#define PROTO FADDR+23
	249	#define RCVCC PROTO+6
	250	#define SNDCC RCVCC+7
	251	#define STATE SNDCC+7
	252
6a4aa0a8 KB	253
6a4aa0a8 KB	254	void
9796f3aa SL	255	labelnetstat()
9796f3aa SL	256	{
86923762	257	if (namelist[X_TCB].n_type == 0)
eef33ea7 KB	258	return;
eef33ea7 KB	259	wmove(wnd, 0, 0); wclrtobot(wnd);
9796f3aa SL	260	mvwaddstr(wnd, 0, LADDR, "Local Address");
	261	mvwaddstr(wnd, 0, FADDR, "Foreign Address");
	262	mvwaddstr(wnd, 0, PROTO, "Proto");
	263	mvwaddstr(wnd, 0, RCVCC, "Recv-Q");
	264	mvwaddstr(wnd, 0, SNDCC, "Send-Q");
	265	mvwaddstr(wnd, 0, STATE, "(state)");
	266	}
	267
6a4aa0a8	268	void
9796f3aa SL	269	shownetstat()
	270	{
	271	register struct netinfo p, q;
	272
	273	/*
	274	* First, delete any connections that have gone
	275	* away and adjust the position of connections
	276	* below to reflect the deleted line.
	277	*/
	278	p = netcb.ni_forw;
	279	while (p != (struct netinfo *)&netcb) {
	280	if (p->ni_line == -1 \|\| p->ni_seen) {
	281	p = p->ni_forw;
	282	continue;
	283	}
	284	wmove(wnd, p->ni_line, 0); wdeleteln(wnd);
	285	q = netcb.ni_forw;
	286	for (; q != (struct netinfo *)&netcb; q = q->ni_forw)
833d578b	287	if (q != p && q->ni_line > p->ni_line) {
9796f3aa	288	q->ni_line--;
833d578b SL	289	/* this shouldn't be necessary */
	290	q->ni_flags \|= NIF_LACHG\|NIF_FACHG;
	291	}
9796f3aa SL	292	lastrow--;
9796f3aa SL	293	q = p->ni_forw;
a4e6a87f KB	294	p->ni_prev->ni_forw = p->ni_forw;
	295	p->ni_forw->ni_prev = p->ni_prev;
	296	free(p);
9796f3aa SL	297	p = q;
9796f3aa SL	298	}
9796f3aa SL	299	/*
	300	* Update existing connections and add new ones.
	301	*/
	302	for (p = netcb.ni_forw; p != (struct netinfo *)&netcb; p = p->ni_forw) {
	303	if (p->ni_line == -1) {
	304	/*
	305	* Add a new entry if possible.
	306	*/
833d578b	307	if (lastrow > YMAX(wnd))
9796f3aa SL	308	continue;
	309	p->ni_line = lastrow++;
	310	p->ni_flags \|= NIF_LACHG\|NIF_FACHG;
	311	}
	312	if (p->ni_flags & NIF_LACHG) {
	313	wmove(wnd, p->ni_line, LADDR);
	314	inetprint(&p->ni_laddr, p->ni_lport, p->ni_proto);
	315	p->ni_flags &= ~NIF_LACHG;
	316	}
	317	if (p->ni_flags & NIF_FACHG) {
	318	wmove(wnd, p->ni_line, FADDR);
	319	inetprint(&p->ni_faddr, p->ni_fport, p->ni_proto);
	320	p->ni_flags &= ~NIF_FACHG;
	321	}
	322	mvwaddstr(wnd, p->ni_line, PROTO, p->ni_proto);
	323	mvwprintw(wnd, p->ni_line, RCVCC, "%6d", p->ni_rcvcc);
	324	mvwprintw(wnd, p->ni_line, SNDCC, "%6d", p->ni_sndcc);
	325	if (streq(p->ni_proto, "tcp"))
	326	if (p->ni_state < 0 \|\| p->ni_state >= TCP_NSTATES)
	327	mvwprintw(wnd, p->ni_line, STATE, "%d",
	328	p->ni_state);
	329	else
	330	mvwaddstr(wnd, p->ni_line, STATE,
	331	tcpstates[p->ni_state]);
	332	wclrtoeol(wnd);
	333	}
833d578b SL	334	if (lastrow < YMAX(wnd)) {
	335	wmove(wnd, lastrow, 0); wclrtobot(wnd);
	336	wmove(wnd, YMAX(wnd), 0); wdeleteln(wnd); /* XXX */
	337	}
9796f3aa SL	338	}
	339
	340	/*
	341	* Pretty print an Internet address (net address + port).
	342	* If the nflag was specified, use numbers instead of names.
	343	*/
591f9018	344	static void
9796f3aa SL	345	inetprint(in, port, proto)
	346	register struct in_addr *in;
	347	int port;
	348	char *proto;
	349	{
	350	struct servent *sp = 0;
	351	char line[80], cp, index();
	352
	353	sprintf(line, "%.s.", 16, inetname(in));
	354	cp = index(line, '\0');
	355	if (!nflag && port)
	356	sp = getservbyport(port, proto);
	357	if (sp \|\| port == 0)
	358	sprintf(cp, "%.8s", sp ? sp->s_name : "*");
	359	else
	360	sprintf(cp, "%d", ntohs((u_short)port));
	361	/* pad to full column to clear any garbage */
	362	cp = index(line, '\0');
	363	while (cp - line < 22)
	364	*cp++ = ' ';
	365	*cp = '\0';
	366	waddstr(wnd, line);
	367	}
	368
	369	/*
	370	* Construct an Internet address representation.
	371	* If the nflag has been supplied, give
	372	* numeric value, otherwise try for symbolic name.
	373	*/
	374	static char *
	375	inetname(in)
	376	struct in_addr in;
	377	{
	378	char *cp = 0;
	379	static char line[50];
	380	struct hostent *hp;
	381	struct netent *np;
	382
	383	if (!nflag && in.s_addr != INADDR_ANY) {
	384	int net = inet_netof(in);
	385	int lna = inet_lnaof(in);
	386
	387	if (lna == INADDR_ANY) {
	388	np = getnetbyaddr(net, AF_INET);
	389	if (np)
	390	cp = np->n_name;
	391	}
	392	if (cp == 0) {
142cb8a1	393	hp = gethostbyaddr((char *)&in, sizeof (in), AF_INET);
9796f3aa SL	394	if (hp)
	395	cp = hp->h_name;
	396	}
	397	}
	398	if (in.s_addr == INADDR_ANY)
	399	strcpy(line, "*");
	400	else if (cp)
	401	strcpy(line, cp);
	402	else {
	403	in.s_addr = ntohl(in.s_addr);
	404	#define C(x) ((x) & 0xff)
	405	sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24),
	406	C(in.s_addr >> 16), C(in.s_addr >> 8), C(in.s_addr));
	407	}
	408	return (line);
	409	}
	410
6a4aa0a8	411	int
9796f3aa	412	cmdnetstat(cmd, args)
eef33ea7	413	char cmd, args;
9796f3aa SL	414	{
9796f3aa SL	415	register struct netinfo *p;
9796f3aa	416
9796f3aa SL	417	if (prefix(cmd, "all")) {
	418	aflag = !aflag;
	419	goto fixup;
	420	}
	421	if (prefix(cmd, "numbers") \|\| prefix(cmd, "names")) {
	422	int new;
	423
	424	new = prefix(cmd, "numbers");
	425	if (new == nflag)
833d578b	426	return (1);
9796f3aa SL	427	p = netcb.ni_forw;
	428	for (; p != (struct netinfo *)&netcb; p = p->ni_forw) {
	429	if (p->ni_line == -1)
	430	continue;
	431	p->ni_flags \|= NIF_LACHG\|NIF_FACHG;
	432	}
	433	nflag = new;
	434	goto redisplay;
	435	}
833d578b SL	436	if (!netcmd(cmd, args))
833d578b SL	437	return (0);
9796f3aa SL	438	fixup:
	439	fetchnetstat();
	440	redisplay:
	441	shownetstat();
	442	refresh();
9796f3aa SL	443	return (1);
9796f3aa SL	444	}