1 /* $NetBSD: netcmds.c,v 1.3 1995/04/29 05:54:48 cgd Exp $ */ 2 3 /*- 4 * Copyright (c) 1980, 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)netcmds.c 8.1 (Berkeley) 6/6/93"; 39 #endif 40 static char rcsid[] = "$NetBSD: netcmds.c,v 1.3 1995/04/29 05:54:48 cgd Exp $"; 41 #endif /* not lint */ 42 43 /* 44 * Common network command support routines. 45 */ 46 #include <sys/param.h> 47 #include <sys/socket.h> 48 #include <sys/socketvar.h> 49 #include <sys/mbuf.h> 50 #include <sys/protosw.h> 51 52 #include <net/route.h> 53 #include <netinet/in.h> 54 #include <netinet/in_systm.h> 55 #include <netinet/ip.h> 56 #include <netinet/in_pcb.h> 57 58 #include <arpa/inet.h> 59 60 #include <netdb.h> 61 #include <stdlib.h> 62 #include <string.h> 63 #include <ctype.h> 64 #include "systat.h" 65 #include "extern.h" 66 67 #define streq(a,b) (strcmp(a,b)==0) 68 69 static struct hitem { 70 struct in_addr addr; 71 int onoff; 72 } *hosts; 73 74 int nports, nhosts, protos; 75 76 static void changeitems __P((char *, int)); 77 static int selectproto __P((char *)); 78 static void showprotos __P((void)); 79 static int selectport __P((long, int)); 80 static void showports __P((void)); 81 static int selecthost __P((struct in_addr *, int)); 82 static void showhosts __P((void)); 83 84 int 85 netcmd(cmd, args) 86 char *cmd, *args; 87 { 88 89 if (prefix(cmd, "tcp") || prefix(cmd, "udp")) { 90 selectproto(cmd); 91 return (1); 92 } 93 if (prefix(cmd, "ignore") || prefix(cmd, "display")) { 94 changeitems(args, prefix(cmd, "display")); 95 return (1); 96 } 97 if (prefix(cmd, "reset")) { 98 selectproto(0); 99 selecthost(0, 0); 100 selectport(-1, 0); 101 return (1); 102 } 103 if (prefix(cmd, "show")) { 104 move(CMDLINE, 0); clrtoeol(); 105 if (*args == '\0') { 106 showprotos(); 107 showhosts(); 108 showports(); 109 return (1); 110 } 111 if (prefix(args, "protos")) 112 showprotos(); 113 else if (prefix(args, "hosts")) 114 showhosts(); 115 else if (prefix(args, "ports")) 116 showports(); 117 else 118 addstr("show what?"); 119 return (1); 120 } 121 return (0); 122 } 123 124 125 static void 126 changeitems(args, onoff) 127 char *args; 128 int onoff; 129 { 130 register char *cp; 131 struct servent *sp; 132 struct hostent *hp; 133 struct in_addr in; 134 char *index(); 135 136 cp = index(args, '\n'); 137 if (cp) 138 *cp = '\0'; 139 for (;;args = cp) { 140 for (cp = args; *cp && isspace(*cp); cp++) 141 ; 142 args = cp; 143 for (; *cp && !isspace(*cp); cp++) 144 ; 145 if (*cp) 146 *cp++ = '\0'; 147 if (cp - args == 0) 148 break; 149 sp = getservbyname(args, 150 protos == TCP ? "tcp" : protos == UDP ? "udp" : 0); 151 if (sp) { 152 selectport(sp->s_port, onoff); 153 continue; 154 } 155 hp = gethostbyname(args); 156 if (hp == 0) { 157 in.s_addr = inet_addr(args); 158 if (in.s_addr == -1) { 159 error("%s: unknown host or port", args); 160 continue; 161 } 162 } else 163 in = *(struct in_addr *)hp->h_addr; 164 selecthost(&in, onoff); 165 } 166 } 167 168 static int 169 selectproto(proto) 170 char *proto; 171 { 172 int new = protos; 173 174 if (proto == 0 || streq(proto, "all")) 175 new = TCP|UDP; 176 else if (streq(proto, "tcp")) 177 new = TCP; 178 else if (streq(proto, "udp")) 179 new = UDP; 180 return (new != protos, protos = new); 181 } 182 183 static void 184 showprotos() 185 { 186 187 if ((protos&TCP) == 0) 188 addch('!'); 189 addstr("tcp "); 190 if ((protos&UDP) == 0) 191 addch('!'); 192 addstr("udp "); 193 } 194 195 static struct pitem { 196 long port; 197 int onoff; 198 } *ports; 199 200 static int 201 selectport(port, onoff) 202 long port; 203 int onoff; 204 { 205 register struct pitem *p; 206 207 if (port == -1) { 208 if (ports == 0) 209 return (0); 210 free((char *)ports), ports = 0; 211 nports = 0; 212 return (1); 213 } 214 for (p = ports; p < ports+nports; p++) 215 if (p->port == port) { 216 p->onoff = onoff; 217 return (0); 218 } 219 if (nports == 0) 220 ports = (struct pitem *)malloc(sizeof (*p)); 221 else 222 ports = (struct pitem *)realloc(ports, (nports+1)*sizeof (*p)); 223 p = &ports[nports++]; 224 p->port = port; 225 p->onoff = onoff; 226 return (1); 227 } 228 229 int 230 checkport(inp) 231 register struct inpcb *inp; 232 { 233 register struct pitem *p; 234 235 if (ports) 236 for (p = ports; p < ports+nports; p++) 237 if (p->port == inp->inp_lport || p->port == inp->inp_fport) 238 return (p->onoff); 239 return (1); 240 } 241 242 static void 243 showports() 244 { 245 register struct pitem *p; 246 struct servent *sp; 247 248 for (p = ports; p < ports+nports; p++) { 249 sp = getservbyport(p->port, 250 protos == TCP|UDP ? 0 : protos == TCP ? "tcp" : "udp"); 251 if (!p->onoff) 252 addch('!'); 253 if (sp) 254 printw("%s ", sp->s_name); 255 else 256 printw("%d ", p->port); 257 } 258 } 259 260 static int 261 selecthost(in, onoff) 262 struct in_addr *in; 263 int onoff; 264 { 265 register struct hitem *p; 266 267 if (in == 0) { 268 if (hosts == 0) 269 return (0); 270 free((char *)hosts), hosts = 0; 271 nhosts = 0; 272 return (1); 273 } 274 for (p = hosts; p < hosts+nhosts; p++) 275 if (p->addr.s_addr == in->s_addr) { 276 p->onoff = onoff; 277 return (0); 278 } 279 if (nhosts == 0) 280 hosts = (struct hitem *)malloc(sizeof (*p)); 281 else 282 hosts = (struct hitem *)realloc(hosts, (nhosts+1)*sizeof (*p)); 283 p = &hosts[nhosts++]; 284 p->addr = *in; 285 p->onoff = onoff; 286 return (1); 287 } 288 289 int 290 checkhost(inp) 291 register struct inpcb *inp; 292 { 293 register struct hitem *p; 294 295 if (hosts) 296 for (p = hosts; p < hosts+nhosts; p++) 297 if (p->addr.s_addr == inp->inp_laddr.s_addr || 298 p->addr.s_addr == inp->inp_faddr.s_addr) 299 return (p->onoff); 300 return (1); 301 } 302 303 static void 304 showhosts() 305 { 306 register struct hitem *p; 307 struct hostent *hp; 308 309 for (p = hosts; p < hosts+nhosts; p++) { 310 hp = gethostbyaddr((char *)&p->addr, sizeof (p->addr), AF_INET); 311 if (!p->onoff) 312 addch('!'); 313 printw("%s ", hp ? hp->h_name : inet_ntoa(p->addr)); 314 } 315 } 316