netcmds.c revision 1.1
1 /*- 2 * Copyright (c) 1980, 1992, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 static char sccsid[] = "@(#)netcmds.c 8.1 (Berkeley) 6/6/93"; 36 #endif /* not lint */ 37 38 /* 39 * Common network command support routines. 40 */ 41 #include <sys/param.h> 42 #include <sys/socket.h> 43 #include <sys/socketvar.h> 44 #include <sys/mbuf.h> 45 #include <sys/protosw.h> 46 47 #include <net/route.h> 48 #include <netinet/in.h> 49 #include <netinet/in_systm.h> 50 #include <netinet/ip.h> 51 #include <netinet/in_pcb.h> 52 53 #include <netdb.h> 54 #include <stdlib.h> 55 #include <string.h> 56 #include <ctype.h> 57 #include "systat.h" 58 #include "extern.h" 59 60 #define streq(a,b) (strcmp(a,b)==0) 61 62 static struct hitem { 63 struct in_addr addr; 64 int onoff; 65 } *hosts; 66 67 int nports, nhosts, protos; 68 69 static void changeitems __P((char *, int)); 70 static int selectproto __P((char *)); 71 static void showprotos __P((void)); 72 static int selectport __P((long, int)); 73 static void showports __P((void)); 74 static int selecthost __P((struct in_addr *, int)); 75 static void showhosts __P((void)); 76 77 int 78 netcmd(cmd, args) 79 char *cmd, *args; 80 { 81 82 if (prefix(cmd, "tcp") || prefix(cmd, "udp")) { 83 selectproto(cmd); 84 return (1); 85 } 86 if (prefix(cmd, "ignore") || prefix(cmd, "display")) { 87 changeitems(args, prefix(cmd, "display")); 88 return (1); 89 } 90 if (prefix(cmd, "reset")) { 91 selectproto(0); 92 selecthost(0, 0); 93 selectport(-1, 0); 94 return (1); 95 } 96 if (prefix(cmd, "show")) { 97 move(CMDLINE, 0); clrtoeol(); 98 if (*args == '\0') { 99 showprotos(); 100 showhosts(); 101 showports(); 102 return (1); 103 } 104 if (prefix(args, "protos")) 105 showprotos(); 106 else if (prefix(args, "hosts")) 107 showhosts(); 108 else if (prefix(args, "ports")) 109 showports(); 110 else 111 addstr("show what?"); 112 return (1); 113 } 114 return (0); 115 } 116 117 118 static void 119 changeitems(args, onoff) 120 char *args; 121 int onoff; 122 { 123 register char *cp; 124 struct servent *sp; 125 struct hostent *hp; 126 struct in_addr in; 127 char *index(); 128 129 cp = index(args, '\n'); 130 if (cp) 131 *cp = '\0'; 132 for (;;args = cp) { 133 for (cp = args; *cp && isspace(*cp); cp++) 134 ; 135 args = cp; 136 for (; *cp && !isspace(*cp); cp++) 137 ; 138 if (*cp) 139 *cp++ = '\0'; 140 if (cp - args == 0) 141 break; 142 sp = getservbyname(args, 143 protos == TCP ? "tcp" : protos == UDP ? "udp" : 0); 144 if (sp) { 145 selectport(sp->s_port, onoff); 146 continue; 147 } 148 hp = gethostbyname(args); 149 if (hp == 0) { 150 in.s_addr = inet_addr(args); 151 if (in.s_addr == -1) { 152 error("%s: unknown host or port", args); 153 continue; 154 } 155 } else 156 in = *(struct in_addr *)hp->h_addr; 157 selecthost(&in, onoff); 158 } 159 } 160 161 static int 162 selectproto(proto) 163 char *proto; 164 { 165 int new = protos; 166 167 if (proto == 0 || streq(proto, "all")) 168 new = TCP|UDP; 169 else if (streq(proto, "tcp")) 170 new = TCP; 171 else if (streq(proto, "udp")) 172 new = UDP; 173 return (new != protos, protos = new); 174 } 175 176 static void 177 showprotos() 178 { 179 180 if ((protos&TCP) == 0) 181 addch('!'); 182 addstr("tcp "); 183 if ((protos&UDP) == 0) 184 addch('!'); 185 addstr("udp "); 186 } 187 188 static struct pitem { 189 long port; 190 int onoff; 191 } *ports; 192 193 static int 194 selectport(port, onoff) 195 long port; 196 int onoff; 197 { 198 register struct pitem *p; 199 200 if (port == -1) { 201 if (ports == 0) 202 return (0); 203 free((char *)ports), ports = 0; 204 nports = 0; 205 return (1); 206 } 207 for (p = ports; p < ports+nports; p++) 208 if (p->port == port) { 209 p->onoff = onoff; 210 return (0); 211 } 212 if (nports == 0) 213 ports = (struct pitem *)malloc(sizeof (*p)); 214 else 215 ports = (struct pitem *)realloc(ports, (nports+1)*sizeof (*p)); 216 p = &ports[nports++]; 217 p->port = port; 218 p->onoff = onoff; 219 return (1); 220 } 221 222 int 223 checkport(inp) 224 register struct inpcb *inp; 225 { 226 register struct pitem *p; 227 228 if (ports) 229 for (p = ports; p < ports+nports; p++) 230 if (p->port == inp->inp_lport || p->port == inp->inp_fport) 231 return (p->onoff); 232 return (1); 233 } 234 235 static void 236 showports() 237 { 238 register struct pitem *p; 239 struct servent *sp; 240 241 for (p = ports; p < ports+nports; p++) { 242 sp = getservbyport(p->port, 243 protos == TCP|UDP ? 0 : protos == TCP ? "tcp" : "udp"); 244 if (!p->onoff) 245 addch('!'); 246 if (sp) 247 printw("%s ", sp->s_name); 248 else 249 printw("%d ", p->port); 250 } 251 } 252 253 static int 254 selecthost(in, onoff) 255 struct in_addr *in; 256 int onoff; 257 { 258 register struct hitem *p; 259 260 if (in == 0) { 261 if (hosts == 0) 262 return (0); 263 free((char *)hosts), hosts = 0; 264 nhosts = 0; 265 return (1); 266 } 267 for (p = hosts; p < hosts+nhosts; p++) 268 if (p->addr.s_addr == in->s_addr) { 269 p->onoff = onoff; 270 return (0); 271 } 272 if (nhosts == 0) 273 hosts = (struct hitem *)malloc(sizeof (*p)); 274 else 275 hosts = (struct hitem *)realloc(hosts, (nhosts+1)*sizeof (*p)); 276 p = &hosts[nhosts++]; 277 p->addr = *in; 278 p->onoff = onoff; 279 return (1); 280 } 281 282 int 283 checkhost(inp) 284 register struct inpcb *inp; 285 { 286 register struct hitem *p; 287 288 if (hosts) 289 for (p = hosts; p < hosts+nhosts; p++) 290 if (p->addr.s_addr == inp->inp_laddr.s_addr || 291 p->addr.s_addr == inp->inp_faddr.s_addr) 292 return (p->onoff); 293 return (1); 294 } 295 296 static void 297 showhosts() 298 { 299 register struct hitem *p; 300 struct hostent *hp; 301 302 for (p = hosts; p < hosts+nhosts; p++) { 303 hp = gethostbyaddr((char *)&p->addr, sizeof (p->addr), AF_INET); 304 if (!p->onoff) 305 addch('!'); 306 printw("%s ", hp ? hp->h_name : (char *)inet_ntoa(p->addr)); 307 } 308 } 309
Indexes created Fri Sep 26 20:09:58 GMT 2025