8a16b7a18f
Mainly focus on files that use BSD 3-Clause license. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Special thanks to Wind River for providing access to "The Duke of Highlander" tool: an older (2014) run over FreeBSD tree was useful as a starting point.
311 lines
6.7 KiB
C
311 lines
6.7 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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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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__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 in_conninfo *inc)
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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 == inc->inc_lport || p->port == inc->inc_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 in_conninfo *inc)
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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 == inc->inc_laddr.s_addr ||
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p->addr.s_addr == inc->inc_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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