1 /* $NetBSD: netcmds.c,v 1.6 1997/10/19 23:36:28 lukem 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 #include <sys/cdefs.h> 37 #ifndef lint 38 #if 0 39 static char sccsid[] = "@(#)netcmds.c 8.1 (Berkeley) 6/6/93"; 40 #endif 41 __RCSID("$NetBSD: netcmds.c,v 1.6 1997/10/19 23:36:28 lukem Exp $"); 42 #endif /* not lint */ 43 44 /* 45 * Common network command support routines. 46 */ 47 #include <sys/param.h> 48 #include <sys/socket.h> 49 #include <sys/socketvar.h> 50 #include <sys/mbuf.h> 51 #include <sys/protosw.h> 52 53 #include <net/route.h> 54 #include <netinet/in.h> 55 #include <netinet/in_systm.h> 56 #include <netinet/ip.h> 57 #include <netinet/in_pcb.h> 58 59 #include <arpa/inet.h> 60 61 #include <netdb.h> 62 #include <stdlib.h> 63 #include <string.h> 64 #include <ctype.h> 65 #include "systat.h" 66 #include "extern.h" 67 68 #define streq(a,b) (strcmp(a,b)==0) 69 70 static struct hitem { 71 struct in_addr addr; 72 int onoff; 73 } *hosts; 74 75 int nports, nhosts, protos; 76 77 static void changeitems __P((char *, int)); 78 static void selectproto __P((char *)); 79 static void showprotos __P((void)); 80 static int selectport __P((long, int)); 81 static void showports __P((void)); 82 static int selecthost __P((struct in_addr *, int)); 83 static void showhosts __P((void)); 84 85 int 86 netcmd(cmd, args) 87 char *cmd, *args; 88 { 89 90 if (prefix(cmd, "tcp") || prefix(cmd, "udp")) { 91 selectproto(cmd); 92 return (1); 93 } 94 if (prefix(cmd, "ignore") || prefix(cmd, "display")) { 95 changeitems(args, prefix(cmd, "display")); 96 return (1); 97 } 98 if (prefix(cmd, "reset")) { 99 selectproto(0); 100 selecthost(0, 0); 101 selectport(-1, 0); 102 return (1); 103 } 104 if (prefix(cmd, "show")) { 105 move(CMDLINE, 0); clrtoeol(); 106 if (*args == '\0') { 107 showprotos(); 108 showhosts(); 109 showports(); 110 return (1); 111 } 112 if (prefix(args, "protos")) 113 showprotos(); 114 else if (prefix(args, "hosts")) 115 showhosts(); 116 else if (prefix(args, "ports")) 117 showports(); 118 else 119 addstr("show what?"); 120 return (1); 121 } 122 return (0); 123 } 124 125 126 static void 127 changeitems(args, onoff) 128 char *args; 129 int onoff; 130 { 131 char *cp; 132 struct servent *sp; 133 struct hostent *hp; 134 struct in_addr in; 135 136 cp = strchr(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 if (inet_aton(args, &in) == 0) { 156 hp = gethostbyname(args); 157 if (hp == 0) { 158 error("%s: unknown host or port", args); 159 continue; 160 } 161 memcpy(&in, hp->h_addr, hp->h_length); 162 } 163 selecthost(&in, onoff); 164 } 165 } 166 167 static void 168 selectproto(proto) 169 char *proto; 170 { 171 172 if (proto == 0 || streq(proto, "all")) 173 protos = TCP|UDP; 174 else if (streq(proto, "tcp")) 175 protos = TCP; 176 else if (streq(proto, "udp")) 177 protos = UDP; 178 } 179 180 static void 181 showprotos() 182 { 183 184 if ((protos&TCP) == 0) 185 addch('!'); 186 addstr("tcp "); 187 if ((protos&UDP) == 0) 188 addch('!'); 189 addstr("udp "); 190 } 191 192 static struct pitem { 193 long port; 194 int onoff; 195 } *ports; 196 197 static int 198 selectport(port, onoff) 199 long port; 200 int onoff; 201 { 202 struct pitem *p; 203 204 if (port == -1) { 205 if (ports == 0) 206 return (0); 207 free((char *)ports), ports = 0; 208 nports = 0; 209 return (1); 210 } 211 for (p = ports; p < ports+nports; p++) 212 if (p->port == port) { 213 p->onoff = onoff; 214 return (0); 215 } 216 if (nports == 0) 217 ports = (struct pitem *)malloc(sizeof (*p)); 218 else 219 ports = (struct pitem *)realloc(ports, (nports+1)*sizeof (*p)); 220 p = &ports[nports++]; 221 p->port = port; 222 p->onoff = onoff; 223 return (1); 224 } 225 226 int 227 checkport(inp) 228 struct inpcb *inp; 229 { 230 struct pitem *p; 231 232 if (ports) 233 for (p = ports; p < ports+nports; p++) 234 if (p->port == inp->inp_lport || p->port == inp->inp_fport) 235 return (p->onoff); 236 return (1); 237 } 238 239 static void 240 showports() 241 { 242 struct pitem *p; 243 struct servent *sp; 244 245 for (p = ports; p < ports+nports; p++) { 246 sp = getservbyport(p->port, 247 protos == (TCP|UDP) ? 0 : protos == TCP ? "tcp" : "udp"); 248 if (!p->onoff) 249 addch('!'); 250 if (sp) 251 printw("%s ", sp->s_name); 252 else 253 printw("%d ", p->port); 254 } 255 } 256 257 static int 258 selecthost(in, onoff) 259 struct in_addr *in; 260 int onoff; 261 { 262 struct hitem *p; 263 264 if (in == 0) { 265 if (hosts == 0) 266 return (0); 267 free((char *)hosts), hosts = 0; 268 nhosts = 0; 269 return (1); 270 } 271 for (p = hosts; p < hosts+nhosts; p++) 272 if (p->addr.s_addr == in->s_addr) { 273 p->onoff = onoff; 274 return (0); 275 } 276 if (nhosts == 0) 277 hosts = (struct hitem *)malloc(sizeof (*p)); 278 else 279 hosts = (struct hitem *)realloc(hosts, (nhosts+1)*sizeof (*p)); 280 p = &hosts[nhosts++]; 281 p->addr = *in; 282 p->onoff = onoff; 283 return (1); 284 } 285 286 int 287 checkhost(inp) 288 struct inpcb *inp; 289 { 290 struct hitem *p; 291 292 if (hosts) 293 for (p = hosts; p < hosts+nhosts; p++) 294 if (p->addr.s_addr == inp->inp_laddr.s_addr || 295 p->addr.s_addr == inp->inp_faddr.s_addr) 296 return (p->onoff); 297 return (1); 298 } 299 300 static void 301 showhosts() 302 { 303 struct hitem *p; 304 struct hostent *hp; 305 306 for (p = hosts; p < hosts+nhosts; p++) { 307 hp = gethostbyaddr((char *)&p->addr, sizeof (p->addr), AF_INET); 308 if (!p->onoff) 309 addch('!'); 310 printw("%s ", hp ? hp->h_name : inet_ntoa(p->addr)); 311 } 312 } 313