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 #include <sys/cdefs.h> 35 36 __FBSDID("$FreeBSD$"); 37 38 #ifdef lint 39 static const char sccsid[] = "@(#)netcmds.c 8.1 (Berkeley) 6/6/93"; 40 #endif 41 42 /* 43 * Common network command support routines. 44 */ 45 #include <sys/param.h> 46 #include <sys/queue.h> 47 #include <sys/socket.h> 48 #include <sys/socketvar.h> 49 #include <sys/protosw.h> 50 51 #include <net/route.h> 52 #include <netinet/in.h> 53 #include <netinet/in_systm.h> 54 #include <netinet/ip.h> 55 #include <netinet/in_pcb.h> 56 #include <arpa/inet.h> 57 58 #include <ctype.h> 59 #include <netdb.h> 60 #include <stdlib.h> 61 #include <string.h> 62 63 #include "systat.h" 64 #include "extern.h" 65 66 #define streq(a,b) (strcmp(a,b)==0) 67 68 static struct hitem { 69 struct in_addr addr; 70 int onoff; 71 } *hosts; 72 73 int nports, nhosts, protos; 74 75 static void changeitems(const char *, int); 76 static int selectproto(const char *); 77 static void showprotos(void); 78 static int selectport(long, int); 79 static void showports(void); 80 static int selecthost(struct in_addr *, int); 81 static void showhosts(void); 82 83 int 84 netcmd(const char *cmd, const char *args) 85 { 86 87 if (prefix(cmd, "proto")) { 88 if (*args == '\0') { 89 move(CMDLINE, 0); 90 clrtoeol(); 91 addstr("which proto?"); 92 } else if (!selectproto(args)) { 93 error("%s: Unknown protocol.", args); 94 } 95 return (1); 96 } 97 if (prefix(cmd, "ignore") || prefix(cmd, "display")) { 98 changeitems(args, prefix(cmd, "display")); 99 return (1); 100 } 101 if (prefix(cmd, "reset")) { 102 selectproto(0); 103 selecthost(0, 0); 104 selectport(-1, 0); 105 return (1); 106 } 107 if (prefix(cmd, "show")) { 108 move(CMDLINE, 0); clrtoeol(); 109 if (*args == '\0') { 110 showprotos(); 111 showhosts(); 112 showports(); 113 return (1); 114 } 115 if (prefix(args, "protos")) 116 showprotos(); 117 else if (prefix(args, "hosts")) 118 showhosts(); 119 else if (prefix(args, "ports")) 120 showports(); 121 else 122 addstr("show what?"); 123 return (1); 124 } 125 return (0); 126 } 127 128 129 static void 130 changeitems(const char *args, int onoff) 131 { 132 char *cp, *tmpstr, *tmpstr1; 133 struct servent *sp; 134 struct hostent *hp; 135 struct in_addr in; 136 137 tmpstr = tmpstr1 = strdup(args); 138 cp = index(tmpstr1, '\n'); 139 if (cp) 140 *cp = '\0'; 141 for (;;tmpstr1 = cp) { 142 for (cp = tmpstr1; *cp && isspace(*cp); cp++) 143 ; 144 tmpstr1 = cp; 145 for (; *cp && !isspace(*cp); cp++) 146 ; 147 if (*cp) 148 *cp++ = '\0'; 149 if (cp - tmpstr1 == 0) 150 break; 151 sp = getservbyname(tmpstr1, 152 protos == TCP ? "tcp" : protos == UDP ? "udp" : 0); 153 if (sp) { 154 selectport(sp->s_port, onoff); 155 continue; 156 } 157 hp = gethostbyname(tmpstr1); 158 if (hp == 0) { 159 in.s_addr = inet_addr(tmpstr1); 160 if ((int)in.s_addr == -1) { 161 error("%s: unknown host or port", tmpstr1); 162 continue; 163 } 164 } else 165 in = *(struct in_addr *)hp->h_addr; 166 selecthost(&in, onoff); 167 } 168 free(tmpstr); 169 } 170 171 static int 172 selectproto(const char *proto) 173 { 174 175 if (proto == 0 || streq(proto, "all")) 176 protos = TCP | UDP; 177 else if (streq(proto, "tcp")) 178 protos = TCP; 179 else if (streq(proto, "udp")) 180 protos = UDP; 181 else 182 return (0); 183 184 return (protos); 185 } 186 187 static void 188 showprotos(void) 189 { 190 191 if ((protos&TCP) == 0) 192 addch('!'); 193 addstr("tcp "); 194 if ((protos&UDP) == 0) 195 addch('!'); 196 addstr("udp "); 197 } 198 199 static struct pitem { 200 long port; 201 int onoff; 202 } *ports; 203 204 static int 205 selectport(long port, int onoff) 206 { 207 struct pitem *p; 208 209 if (port == -1) { 210 if (ports == 0) 211 return (0); 212 free((char *)ports), ports = 0; 213 nports = 0; 214 return (1); 215 } 216 for (p = ports; p < ports+nports; p++) 217 if (p->port == port) { 218 p->onoff = onoff; 219 return (0); 220 } 221 if (nports == 0) 222 ports = (struct pitem *)malloc(sizeof (*p)); 223 else 224 ports = (struct pitem *)realloc(ports, (nports+1)*sizeof (*p)); 225 p = &ports[nports++]; 226 p->port = port; 227 p->onoff = onoff; 228 return (1); 229 } 230 231 int 232 checkport(struct inpcb *inp) 233 { 234 struct pitem *p; 235 236 if (ports) 237 for (p = ports; p < ports+nports; p++) 238 if (p->port == inp->inp_lport || p->port == inp->inp_fport) 239 return (p->onoff); 240 return (1); 241 } 242 243 static void 244 showports(void) 245 { 246 struct pitem *p; 247 struct servent *sp; 248 249 for (p = ports; p < ports+nports; p++) { 250 sp = getservbyport(p->port, 251 protos == (TCP|UDP) ? 0 : protos == TCP ? "tcp" : "udp"); 252 if (!p->onoff) 253 addch('!'); 254 if (sp) 255 printw("%s ", sp->s_name); 256 else 257 printw("%d ", p->port); 258 } 259 } 260 261 static int 262 selecthost(struct in_addr *in, int onoff) 263 { 264 struct hitem *p; 265 266 if (in == 0) { 267 if (hosts == 0) 268 return (0); 269 free((char *)hosts), hosts = 0; 270 nhosts = 0; 271 return (1); 272 } 273 for (p = hosts; p < hosts+nhosts; p++) 274 if (p->addr.s_addr == in->s_addr) { 275 p->onoff = onoff; 276 return (0); 277 } 278 if (nhosts == 0) 279 hosts = (struct hitem *)malloc(sizeof (*p)); 280 else 281 hosts = (struct hitem *)realloc(hosts, (nhosts+1)*sizeof (*p)); 282 p = &hosts[nhosts++]; 283 p->addr = *in; 284 p->onoff = onoff; 285 return (1); 286 } 287 288 int 289 checkhost(struct inpcb *inp) 290 { 291 struct hitem *p; 292 293 if (hosts) 294 for (p = hosts; p < hosts+nhosts; p++) 295 if (p->addr.s_addr == inp->inp_laddr.s_addr || 296 p->addr.s_addr == inp->inp_faddr.s_addr) 297 return (p->onoff); 298 return (1); 299 } 300 301 static void 302 showhosts(void) 303 { 304 struct hitem *p; 305 struct hostent *hp; 306 307 for (p = hosts; p < hosts+nhosts; p++) { 308 hp = gethostbyaddr((char *)&p->addr, sizeof (p->addr), AF_INET); 309 if (!p->onoff) 310 addch('!'); 311 printw("%s ", hp ? hp->h_name : (char *)inet_ntoa(p->addr)); 312 } 313 } 314