mirror of
https://git.hardenedbsd.org/hardenedbsd/HardenedBSD.git
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309 lines
6.6 KiB
C
309 lines
6.6 KiB
C
/*-
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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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* 4. 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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__FBSDID("$FreeBSD$");
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#ifdef lint
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static const char sccsid[] = "@(#)netcmds.c 8.1 (Berkeley) 6/6/93";
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#endif
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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/queue.h>
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#include <sys/socket.h>
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#include <sys/socketvar.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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#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 in_addr addr;
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int onoff;
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} *hosts;
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int nports, nhosts, protos;
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static void changeitems(const char *, int);
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static int 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 selecthost(struct in_addr *, int);
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static void showhosts(void);
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int
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netcmd(const char *cmd, const char *args)
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{
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if (prefix(cmd, "proto")) {
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if (*args == '\0') {
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move(CMDLINE, 0);
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clrtoeol();
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addstr("which proto?");
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} else if (!selectproto(args)) {
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error("%s: Unknown protocol.", args);
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}
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return (1);
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}
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if (prefix(cmd, "ignore") || prefix(cmd, "display")) {
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changeitems(args, prefix(cmd, "display"));
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return (1);
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}
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if (prefix(cmd, "reset")) {
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selectproto(0);
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selecthost(0, 0);
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selectport(-1, 0);
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return (1);
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}
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if (prefix(cmd, "show")) {
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move(CMDLINE, 0); clrtoeol();
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if (*args == '\0') {
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showprotos();
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showhosts();
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showports();
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return (1);
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}
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if (prefix(args, "protos"))
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showprotos();
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else if (prefix(args, "hosts"))
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showhosts();
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else if (prefix(args, "ports"))
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showports();
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else
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addstr("show what?");
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return (1);
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}
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return (0);
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}
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static void
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changeitems(const char *args, int onoff)
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{
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char *cp, *tmpstr, *tmpstr1;
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struct servent *sp;
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struct hostent *hp;
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struct in_addr in;
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tmpstr = tmpstr1 = strdup(args);
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cp = strchr(tmpstr1, '\n');
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if (cp)
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*cp = '\0';
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for (;;tmpstr1 = cp) {
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for (cp = tmpstr1; *cp && isspace(*cp); cp++)
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;
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tmpstr1 = cp;
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for (; *cp && !isspace(*cp); cp++)
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;
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if (*cp)
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*cp++ = '\0';
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if (cp - tmpstr1 == 0)
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break;
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sp = getservbyname(tmpstr1,
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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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hp = gethostbyname(tmpstr1);
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if (hp == NULL) {
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in.s_addr = inet_addr(tmpstr1);
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if (in.s_addr == INADDR_NONE) {
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error("%s: unknown host or port", tmpstr1);
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continue;
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}
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} else
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in = *(struct in_addr *)hp->h_addr;
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selecthost(&in, onoff);
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}
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free(tmpstr);
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}
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static int
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selectproto(const char *proto)
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{
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if (proto == NULL || 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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else
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return (0);
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return (protos);
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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;
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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((char *)ports), ports = 0;
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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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if (nports == 0)
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ports = (struct pitem *)malloc(sizeof (*p));
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else
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ports = (struct pitem *)realloc(ports, (nports+1)*sizeof (*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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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("%d ", p->port);
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}
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}
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static int
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selecthost(struct in_addr *in, int onoff)
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{
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struct hitem *p;
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if (in == NULL) {
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if (hosts == NULL)
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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 (p->addr.s_addr == in->s_addr) {
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p->onoff = onoff;
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return (0);
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}
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if (nhosts == 0)
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hosts = (struct hitem *)malloc(sizeof (*p));
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else
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hosts = (struct hitem *)realloc(hosts, (nhosts+1)*sizeof (*p));
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p = &hosts[nhosts++];
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p->addr = *in;
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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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if (hosts)
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for (p = hosts; p < hosts+nhosts; p++)
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if (p->addr.s_addr == inp->inp_laddr.s_addr ||
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p->addr.s_addr == inp->inp_faddr.s_addr)
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return (p->onoff);
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return (1);
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}
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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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struct hostent *hp;
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for (p = hosts; p < hosts+nhosts; p++) {
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hp = gethostbyaddr((char *)&p->addr, sizeof (p->addr), AF_INET);
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if (!p->onoff)
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addch('!');
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printw("%s ", hp ? hp->h_name : (char *)inet_ntoa(p->addr));
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}
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}
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