freebsd-dev/usr.bin/systat/netcmds.c

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/*-
* Copyright (c) 1980, 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#ifdef lint
static const char sccsid[] = "@(#)netcmds.c 8.1 (Berkeley) 6/6/93";
#endif
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/*
* Common network command support routines.
*/
#include <sys/param.h>
#include <sys/queue.h>
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#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/protosw.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/in_pcb.h>
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#include <arpa/inet.h>
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#include <ctype.h>
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#include <netdb.h>
#include <stdlib.h>
#include <string.h>
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#include "systat.h"
#include "extern.h"
#define streq(a,b) (strcmp(a,b)==0)
static struct hitem {
struct in_addr addr;
int onoff;
} *hosts;
int nports, nhosts, protos;
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static void changeitems(const char *, int);
static int selectproto(const char *);
static void showprotos(void);
static int selectport(long, int);
static void showports(void);
static int selecthost(struct in_addr *, int);
static void showhosts(void);
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int
netcmd(cmd, args)
const char *cmd, *args;
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{
if (prefix(cmd, "proto")) {
if (*args == '\0') {
move(CMDLINE, 0);
clrtoeol();
addstr("which proto?");
} else if (!selectproto(args)) {
error("%s: Unknown protocol.", args);
}
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return (1);
}
if (prefix(cmd, "ignore") || prefix(cmd, "display")) {
changeitems(args, prefix(cmd, "display"));
return (1);
}
if (prefix(cmd, "reset")) {
selectproto(0);
selecthost(0, 0);
selectport(-1, 0);
return (1);
}
if (prefix(cmd, "show")) {
move(CMDLINE, 0); clrtoeol();
if (*args == '\0') {
showprotos();
showhosts();
showports();
return (1);
}
if (prefix(args, "protos"))
showprotos();
else if (prefix(args, "hosts"))
showhosts();
else if (prefix(args, "ports"))
showports();
else
addstr("show what?");
return (1);
}
return (0);
}
static void
changeitems(args, onoff)
const char *args;
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int onoff;
{
char *cp, *tmpstr, *tmpstr1;
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struct servent *sp;
struct hostent *hp;
struct in_addr in;
tmpstr = tmpstr1 = strdup(args);
cp = index(tmpstr1, '\n');
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if (cp)
*cp = '\0';
for (;;tmpstr1 = cp) {
for (cp = tmpstr1; *cp && isspace(*cp); cp++)
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;
tmpstr1 = cp;
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for (; *cp && !isspace(*cp); cp++)
;
if (*cp)
*cp++ = '\0';
if (cp - tmpstr1 == 0)
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break;
sp = getservbyname(tmpstr1,
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protos == TCP ? "tcp" : protos == UDP ? "udp" : 0);
if (sp) {
selectport(sp->s_port, onoff);
continue;
}
hp = gethostbyname(tmpstr1);
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if (hp == 0) {
in.s_addr = inet_addr(tmpstr1);
if ((int)in.s_addr == -1) {
error("%s: unknown host or port", tmpstr1);
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continue;
}
} else
in = *(struct in_addr *)hp->h_addr;
selecthost(&in, onoff);
}
free(tmpstr);
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}
static int
selectproto(proto)
const char *proto;
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{
if (proto == 0 || streq(proto, "all"))
protos = TCP | UDP;
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else if (streq(proto, "tcp"))
protos = TCP;
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else if (streq(proto, "udp"))
protos = UDP;
else
return (0);
return (protos);
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}
static void
showprotos()
{
if ((protos&TCP) == 0)
addch('!');
addstr("tcp ");
if ((protos&UDP) == 0)
addch('!');
addstr("udp ");
}
static struct pitem {
long port;
int onoff;
} *ports;
static int
selectport(port, onoff)
long port;
int onoff;
{
register struct pitem *p;
if (port == -1) {
if (ports == 0)
return (0);
free((char *)ports), ports = 0;
nports = 0;
return (1);
}
for (p = ports; p < ports+nports; p++)
if (p->port == port) {
p->onoff = onoff;
return (0);
}
if (nports == 0)
ports = (struct pitem *)malloc(sizeof (*p));
else
ports = (struct pitem *)realloc(ports, (nports+1)*sizeof (*p));
p = &ports[nports++];
p->port = port;
p->onoff = onoff;
return (1);
}
int
checkport(inp)
register struct inpcb *inp;
{
register struct pitem *p;
if (ports)
for (p = ports; p < ports+nports; p++)
if (p->port == inp->inp_lport || p->port == inp->inp_fport)
return (p->onoff);
return (1);
}
static void
showports()
{
register struct pitem *p;
struct servent *sp;
for (p = ports; p < ports+nports; p++) {
sp = getservbyport(p->port,
protos == (TCP|UDP) ? 0 : protos == TCP ? "tcp" : "udp");
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if (!p->onoff)
addch('!');
if (sp)
printw("%s ", sp->s_name);
else
printw("%d ", p->port);
}
}
static int
selecthost(in, onoff)
struct in_addr *in;
int onoff;
{
register struct hitem *p;
if (in == 0) {
if (hosts == 0)
return (0);
free((char *)hosts), hosts = 0;
nhosts = 0;
return (1);
}
for (p = hosts; p < hosts+nhosts; p++)
if (p->addr.s_addr == in->s_addr) {
p->onoff = onoff;
return (0);
}
if (nhosts == 0)
hosts = (struct hitem *)malloc(sizeof (*p));
else
hosts = (struct hitem *)realloc(hosts, (nhosts+1)*sizeof (*p));
p = &hosts[nhosts++];
p->addr = *in;
p->onoff = onoff;
return (1);
}
int
checkhost(inp)
register struct inpcb *inp;
{
register struct hitem *p;
if (hosts)
for (p = hosts; p < hosts+nhosts; p++)
if (p->addr.s_addr == inp->inp_laddr.s_addr ||
p->addr.s_addr == inp->inp_faddr.s_addr)
return (p->onoff);
return (1);
}
static void
showhosts()
{
register struct hitem *p;
struct hostent *hp;
for (p = hosts; p < hosts+nhosts; p++) {
hp = gethostbyaddr((char *)&p->addr, sizeof (p->addr), AF_INET);
if (!p->onoff)
addch('!');
printw("%s ", hp ? hp->h_name : (char *)inet_ntoa(p->addr));
}
}