/* $NetBSD: netcmds.c,v 1.24 2022/10/28 05:27:17 ozaki-r Exp $ */
/*-
* 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. 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>
#ifndef lint
#if 0
static char sccsid[] = "@(#)netcmds.c 8.1 (Berkeley) 6/6/93";
#endif
__RCSID("$NetBSD: netcmds.c,v 1.24 2022/10/28 05:27:17 ozaki-r Exp $");
#endif /* not lint */
/*
* Common network command support routines.
*/
#include <sys/param.h>
#include <sys/mbuf.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>
#ifdef INET6
#include <netinet/ip6.h>
#include <netinet6/in6_pcb.h>
#endif
#include <arpa/inet.h>
#include <ctype.h>
#include <netdb.h>
#include <stdlib.h>
#include <string.h>
#include "systat.h"
#include "extern.h"
#define streq(a,b) (strcmp(a,b)==0)
static struct hitem {
struct sockaddr_storage addr;
int onoff;
} *hosts = NULL;
int nports, nhosts, protos;
static void changeitems(char *, int);
static void selectproto(const char *);
static void showprotos(void);
static int selectport(long, int);
static void showports(void);
static int addrcmp(struct sockaddr *, struct sockaddr *);
static int selecthost(struct sockaddr *, int);
static void showhosts(void);
/* please note: there are also some netstat commands in netstat.c */
void
netstat_display(char *args)
{
changeitems(args, 1);
}
void
netstat_ignore(char *args)
{
changeitems(args, 0);
}
void
netstat_reset(char *args)
{
selectproto(0);
selecthost(0, 0);
selectport(-1, 0);
}
void
netstat_show(char *args)
{
move(CMDLINE, 0); clrtoeol();
if (!args || *args == '\0') {
showprotos();
showhosts();
showports();
return;
}
if (strstr(args, "protos") == args)
showprotos();
else if (strstr(args, "hosts") == args)
showhosts();
else if (strstr(args, "ports") == args)
showports();
else
addstr("show what?");
}
void
netstat_tcp(char *args)
{
selectproto("tcp");
}
void
netstat_udp(char *args)
{
selectproto("udp");
}
static void
changeitems(char *args, int onoff)
{
char *cp;
struct servent *sp;
struct addrinfo hints, *res, *res0;
cp = strchr(args, '\n');
if (cp)
*cp = '\0';
for (;;args = cp) {
for (cp = args; *cp && isspace((unsigned char)*cp); cp++)
;
args = cp;
for (; *cp && !isspace((unsigned char)*cp); cp++)
;
if (*cp)
*cp++ = '\0';
if (cp - args == 0)
break;
sp = getservbyname(args,
protos == TCP ? "tcp" : protos == UDP ? "udp" : 0);
if (sp) {
selectport(sp->s_port, onoff);
continue;
}
memset(&hints, 0, sizeof(hints));
hints.ai_family = PF_UNSPEC;
hints.ai_socktype = SOCK_DGRAM;
if (getaddrinfo(args, "0", &hints, &res0) != 0) {
error("%s: unknown host or port", args);
continue;
}
for (res = res0; res; res = res->ai_next)
selecthost(res->ai_addr, onoff);
freeaddrinfo(res0);
}
}
static void
selectproto(const char *proto)
{
if (proto == 0 || streq(proto, "all"))
protos = TCP|UDP;
else if (streq(proto, "tcp"))
protos = TCP;
else if (streq(proto, "udp"))
protos = UDP;
}
static void
showprotos(void)
{
if ((protos & TCP) == 0)
addch('!');
addstr("tcp ");
if ((protos & UDP) == 0)
addch('!');
addstr("udp ");
}
static struct pitem {
long port;
int onoff;
} *ports = NULL;
static int
selectport(long port, int onoff)
{
struct pitem *p;
if (port == -1) {
if (ports == NULL)
return (0);
free(ports);
ports = NULL;
nports = 0;
return (1);
}
for (p = ports; p < ports+nports; p++)
if (p->port == port) {
p->onoff = onoff;
return (0);
}
if (reallocarr(&ports, nports + 1, sizeof(*p)) != 0) {
error("malloc failed");
die(0);
}
p = &ports[nports++];
p->port = port;
p->onoff = onoff;
return (1);
}
int
checkport(struct inpcb *inp)
{
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(void)
{
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");
if (!p->onoff)
addch('!');
if (sp)
printw("%s ", sp->s_name);
else
printw("%ld ", p->port);
}
}
static int
addrcmp(struct sockaddr *sa1, struct sockaddr *sa2)
{
if (sa1->sa_family != sa2->sa_family)
return 0;
if (sa1->sa_len != sa2->sa_len)
return 0;
switch (sa1->sa_family) {
case AF_INET:
if (((struct sockaddr_in *)sa1)->sin_addr.s_addr ==
((struct sockaddr_in *)sa2)->sin_addr.s_addr)
return 1;
break;
#ifdef INET6
case AF_INET6:
if (IN6_ARE_ADDR_EQUAL(&((struct sockaddr_in6 *)sa1)->sin6_addr,
&((struct sockaddr_in6 *)sa2)->sin6_addr))
return 1;
break;
#endif
default:
if (memcmp(sa1, sa2, sa1->sa_len) == 0)
return 1;
break;
}
return 0;
}
static int
selecthost(struct sockaddr *sa, int onoff)
{
struct hitem *p;
if (sa == 0) {
if (hosts == 0)
return (0);
free((char *)hosts), hosts = 0;
nhosts = 0;
return (1);
}
for (p = hosts; p < hosts+nhosts; p++)
if (addrcmp((struct sockaddr *)&p->addr, sa)) {
p->onoff = onoff;
return (0);
}
if (sa->sa_len > sizeof(struct sockaddr_storage))
return (-1); /*XXX*/
if (reallocarr(&hosts, nhosts + 1, sizeof(*p)) != 0) {
error("malloc failed");
die(0);
}
p = &hosts[nhosts++];
memcpy(&p->addr, sa, sa->sa_len);
p->onoff = onoff;
return (1);
}
int
checkhost(struct inpcb *inp)
{
struct hitem *p;
struct sockaddr_in *s_in;
if (hosts)
for (p = hosts; p < hosts+nhosts; p++) {
if (((struct sockaddr *)&p->addr)->sa_family != AF_INET)
continue;
s_in = (struct sockaddr_in *)&p->addr;
if (s_in->sin_addr.s_addr == in4p_laddr(inp).s_addr ||
s_in->sin_addr.s_addr == in4p_faddr(inp).s_addr)
return (p->onoff);
}
return (1);
}
#ifdef INET6
int
checkhost6(struct inpcb *inp)
{
struct hitem *p;
struct sockaddr_in6 *sin6;
if (hosts)
for (p = hosts; p < hosts+nhosts; p++) {
if (((struct sockaddr *)&p->addr)->sa_family != AF_INET6)
continue;
sin6 = (struct sockaddr_in6 *)&p->addr;
if (IN6_ARE_ADDR_EQUAL(&sin6->sin6_addr, &in6p_laddr(inp)) ||
IN6_ARE_ADDR_EQUAL(&sin6->sin6_addr, &in6p_faddr(inp)))
return (p->onoff);
}
return (1);
}
#endif
static void
showhosts(void)
{
struct hitem *p;
char hbuf[NI_MAXHOST];
struct sockaddr *sa;
int flags;
#if 0
flags = nflag ? NI_NUMERICHOST : 0;
#else
flags = 0;
#endif
for (p = hosts; p < hosts+nhosts; p++) {
sa = (struct sockaddr *)&p->addr;
if (getnameinfo(sa, sa->sa_len, hbuf, sizeof(hbuf), NULL, 0,
flags) != 0)
strlcpy(hbuf, "(invalid)", sizeof(hbuf));
if (!p->onoff)
addch('!');
printw("%s ", hbuf);
}
}
