402 lines
8.4 KiB
C
402 lines
8.4 KiB
C
/* $NetBSD: netcmds.c,v 1.21 2005/02/26 22:12:33 dsl Exp $ */
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/*-
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* Copyright (c) 1980, 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)netcmds.c 8.1 (Berkeley) 6/6/93";
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#endif
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__RCSID("$NetBSD: netcmds.c,v 1.21 2005/02/26 22:12:33 dsl Exp $");
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#endif /* not lint */
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/*
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* Common network command support routines.
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*/
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#include <sys/param.h>
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#include <sys/mbuf.h>
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#include <sys/protosw.h>
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#include <net/route.h>
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#include <netinet/in.h>
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#include <netinet/in_systm.h>
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#include <netinet/ip.h>
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#include <netinet/in_pcb.h>
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#ifdef INET6
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#include <netinet/ip6.h>
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#include <netinet6/in6_pcb.h>
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#endif
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#include <arpa/inet.h>
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#include <ctype.h>
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#include <netdb.h>
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#include <stdlib.h>
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#include <string.h>
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#include "systat.h"
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#include "extern.h"
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#define streq(a,b) (strcmp(a,b)==0)
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static struct hitem {
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struct sockaddr_storage addr;
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int onoff;
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} *hosts = NULL;
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int nports, nhosts, protos;
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static void changeitems(char *, int);
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static void selectproto(const char *);
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static void showprotos(void);
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static int selectport(long, int);
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static void showports(void);
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static int addrcmp(struct sockaddr *, struct sockaddr *);
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static int selecthost(struct sockaddr *, int);
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static void showhosts(void);
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/* please note: there are also some netstat commands in netstat.c */
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void
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netstat_display(char *args)
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{
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changeitems(args, 1);
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}
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void
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netstat_ignore(char *args)
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{
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changeitems(args, 0);
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}
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void
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netstat_reset(char *args)
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{
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selectproto(0);
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selecthost(0, 0);
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selectport(-1, 0);
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}
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void
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netstat_show(char *args)
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{
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move(CMDLINE, 0); clrtoeol();
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if (!args || *args == '\0') {
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showprotos();
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showhosts();
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showports();
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return;
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}
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if (strstr(args, "protos") == args)
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showprotos();
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else if (strstr(args, "hosts") == args)
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showhosts();
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else if (strstr(args, "ports") == args)
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showports();
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else
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addstr("show what?");
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}
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void
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netstat_tcp(char *args)
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{
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selectproto("tcp");
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}
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void
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netstat_udp(char *args)
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{
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selectproto("udp");
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}
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static void
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changeitems(char *args, int onoff)
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{
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char *cp;
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struct servent *sp;
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struct addrinfo hints, *res, *res0;
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cp = strchr(args, '\n');
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if (cp)
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*cp = '\0';
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for (;;args = cp) {
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for (cp = args; *cp && isspace((unsigned char)*cp); cp++)
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;
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args = cp;
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for (; *cp && !isspace((unsigned char)*cp); cp++)
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;
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if (*cp)
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*cp++ = '\0';
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if (cp - args == 0)
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break;
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sp = getservbyname(args,
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protos == TCP ? "tcp" : protos == UDP ? "udp" : 0);
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if (sp) {
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selectport(sp->s_port, onoff);
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continue;
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}
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memset(&hints, 0, sizeof(hints));
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hints.ai_family = PF_UNSPEC;
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hints.ai_socktype = SOCK_DGRAM;
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if (getaddrinfo(args, "0", &hints, &res0) != 0) {
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error("%s: unknown host or port", args);
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continue;
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}
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for (res = res0; res; res = res->ai_next)
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selecthost(res->ai_addr, onoff);
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freeaddrinfo(res0);
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}
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}
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static void
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selectproto(const char *proto)
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{
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if (proto == 0 || streq(proto, "all"))
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protos = TCP|UDP;
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else if (streq(proto, "tcp"))
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protos = TCP;
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else if (streq(proto, "udp"))
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protos = UDP;
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}
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static void
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showprotos(void)
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{
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if ((protos & TCP) == 0)
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addch('!');
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addstr("tcp ");
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if ((protos & UDP) == 0)
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addch('!');
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addstr("udp ");
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}
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static struct pitem {
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long port;
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int onoff;
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} *ports = NULL;
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static int
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selectport(long port, int onoff)
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{
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struct pitem *p;
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if (port == -1) {
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if (ports == NULL)
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return (0);
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free(ports);
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ports = NULL;
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nports = 0;
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return (1);
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}
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for (p = ports; p < ports+nports; p++)
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if (p->port == port) {
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p->onoff = onoff;
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return (0);
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}
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p = (struct pitem *)realloc(ports, (nports+1)*sizeof (*p));
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if (p == NULL) {
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error("malloc failed");
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die(0);
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}
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ports = p;
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p = &ports[nports++];
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p->port = port;
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p->onoff = onoff;
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return (1);
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}
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int
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checkport(struct inpcb *inp)
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{
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struct pitem *p;
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if (ports)
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for (p = ports; p < ports+nports; p++)
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if (p->port == inp->inp_lport || p->port == inp->inp_fport)
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return (p->onoff);
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return (1);
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}
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#ifdef INET6
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int
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checkport6(struct in6pcb *in6p)
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{
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struct pitem *p;
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if (ports)
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for (p = ports; p < ports+nports; p++)
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if (p->port == in6p->in6p_lport || p->port == in6p->in6p_fport)
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return (p->onoff);
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return (1);
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}
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#endif
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static void
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showports(void)
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{
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struct pitem *p;
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struct servent *sp;
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for (p = ports; p < ports+nports; p++) {
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sp = getservbyport(p->port,
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protos == (TCP|UDP) ? 0 : protos == TCP ? "tcp" : "udp");
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if (!p->onoff)
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addch('!');
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if (sp)
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printw("%s ", sp->s_name);
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else
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printw("%ld ", p->port);
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}
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}
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static int
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addrcmp(struct sockaddr *sa1, struct sockaddr *sa2)
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{
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if (sa1->sa_family != sa2->sa_family)
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return 0;
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if (sa1->sa_len != sa2->sa_len)
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return 0;
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switch (sa1->sa_family) {
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case AF_INET:
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if (((struct sockaddr_in *)sa1)->sin_addr.s_addr ==
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((struct sockaddr_in *)sa2)->sin_addr.s_addr)
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return 1;
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break;
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#ifdef INET6
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case AF_INET6:
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if (IN6_ARE_ADDR_EQUAL(&((struct sockaddr_in6 *)sa1)->sin6_addr,
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&((struct sockaddr_in6 *)sa2)->sin6_addr))
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return 1;
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break;
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#endif
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default:
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if (memcmp(sa1, sa2, sa1->sa_len) == 0)
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return 1;
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break;
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}
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return 0;
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}
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static int
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selecthost(struct sockaddr *sa, int onoff)
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{
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struct hitem *p;
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if (sa == 0) {
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if (hosts == 0)
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return (0);
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free((char *)hosts), hosts = 0;
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nhosts = 0;
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return (1);
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}
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for (p = hosts; p < hosts+nhosts; p++)
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if (addrcmp((struct sockaddr *)&p->addr, sa)) {
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p->onoff = onoff;
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return (0);
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}
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if (sa->sa_len > sizeof(struct sockaddr_storage))
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return (-1); /*XXX*/
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p = (struct hitem *)realloc(hosts, (nhosts+1)*sizeof (*p));
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if (p == NULL) {
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error("malloc failed");
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die(0);
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}
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hosts = p;
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p = &hosts[nhosts++];
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memcpy(&p->addr, sa, sa->sa_len);
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p->onoff = onoff;
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return (1);
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}
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int
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checkhost(struct inpcb *inp)
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{
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struct hitem *p;
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struct sockaddr_in *s_in;
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if (hosts)
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for (p = hosts; p < hosts+nhosts; p++) {
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if (((struct sockaddr *)&p->addr)->sa_family != AF_INET)
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continue;
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s_in = (struct sockaddr_in *)&p->addr;
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if (s_in->sin_addr.s_addr == inp->inp_laddr.s_addr ||
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s_in->sin_addr.s_addr == inp->inp_faddr.s_addr)
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return (p->onoff);
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}
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return (1);
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}
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#ifdef INET6
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int
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checkhost6(struct in6pcb *in6p)
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{
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struct hitem *p;
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struct sockaddr_in6 *sin6;
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if (hosts)
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for (p = hosts; p < hosts+nhosts; p++) {
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if (((struct sockaddr *)&p->addr)->sa_family != AF_INET6)
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continue;
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sin6 = (struct sockaddr_in6 *)&p->addr;
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if (IN6_ARE_ADDR_EQUAL(&sin6->sin6_addr, &in6p->in6p_laddr) ||
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IN6_ARE_ADDR_EQUAL(&sin6->sin6_addr, &in6p->in6p_faddr))
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return (p->onoff);
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}
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return (1);
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}
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#endif
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static void
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showhosts(void)
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{
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struct hitem *p;
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char hbuf[NI_MAXHOST];
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struct sockaddr *sa;
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int flags;
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#if 0
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flags = nflag ? NI_NUMERICHOST : 0;
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#else
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flags = 0;
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#endif
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for (p = hosts; p < hosts+nhosts; p++) {
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sa = (struct sockaddr *)&p->addr;
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if (getnameinfo(sa, sa->sa_len, hbuf, sizeof(hbuf), NULL, 0,
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flags) != 0)
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strlcpy(hbuf, "(invalid)", sizeof(hbuf));
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if (!p->onoff)
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addch('!');
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printw("%s ", hbuf);
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}
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}
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