/*- * SPDX-License-Identifier: BSD-3-Clause * * 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. */ /* * Common network command support routines. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #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; 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); int netcmd(const char *cmd, const char *args) { if (prefix(cmd, "proto")) { if (*args == '\0') { move(CMDLINE, 0); clrtoeol(); addstr("which proto?"); } else if (!selectproto(args)) { error("%s: Unknown protocol.", args); } 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(const char *args, int onoff) { char *cp, *tmpstr, *tmpstr1; struct servent *sp; struct hostent *hp; struct in_addr in; tmpstr = tmpstr1 = strdup(args); cp = strchr(tmpstr1, '\n'); if (cp) *cp = '\0'; for (;;tmpstr1 = cp) { for (cp = tmpstr1; *cp && isspace(*cp); cp++) ; tmpstr1 = cp; for (; *cp && !isspace(*cp); cp++) ; if (*cp) *cp++ = '\0'; if (cp - tmpstr1 == 0) break; sp = getservbyname(tmpstr1, protos == TCP ? "tcp" : protos == UDP ? "udp" : 0); if (sp) { selectport(sp->s_port, onoff); continue; } hp = gethostbyname(tmpstr1); if (hp == NULL) { in.s_addr = inet_addr(tmpstr1); if (in.s_addr == INADDR_NONE) { error("%s: unknown host or port", tmpstr1); continue; } } else in = *(struct in_addr *)hp->h_addr; selecthost(&in, onoff); } free(tmpstr); } static int selectproto(const char *proto) { if (proto == NULL || streq(proto, "all")) protos = TCP | UDP; else if (streq(proto, "tcp")) protos = TCP; else if (streq(proto, "udp")) protos = UDP; else return (0); return (protos); } 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; static int selectport(long port, int onoff) { struct pitem *p; if (port == -1) { if (ports == NULL) 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(struct in_conninfo *inc) { struct pitem *p; if (ports) for (p = ports; p < ports+nports; p++) if (p->port == inc->inc_lport || p->port == inc->inc_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 selecthost(struct in_addr *in, int onoff) { struct hitem *p; if (in == NULL) { if (hosts == NULL) 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(struct in_conninfo *inc) { struct hitem *p; if (hosts) for (p = hosts; p < hosts+nhosts; p++) if (p->addr.s_addr == inc->inc_laddr.s_addr || p->addr.s_addr == inc->inc_faddr.s_addr) return (p->onoff); return (1); } static void showhosts(void) { 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)); } }