usr.bin/systat/netcmds.c

   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  * @(#)netcmds.c        8.1 (Berkeley) 6/6/93
  34  * $FreeBSD: src/usr.bin/systat/netcmds.c,v 1.9 1999/08/28 01:06:04 peter Exp $
  35  * $DragonFly: src/usr.bin/systat/netcmds.c,v 1.5 2004/09/03 20:38:01 dillon Exp $
  36  */
  37
  38 /*
  39  * Common network command support routines.
  40  */
  41 #include <sys/param.h>
  42 #include <sys/queue.h>
  43 #include <sys/socket.h>
  44 #include <sys/socketvar.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 #include <arpa/inet.h>
  53
  54 #include <netdb.h>
  55 #include <stdlib.h>
  56 #include <string.h>
  57 #include <ctype.h>
  58 #include "systat.h"
  59 #include "extern.h"
  60
  61 #define streq(a,b)      (strcmp(a,b)==0)
  62
  63 static  struct hitem {
  64         struct  in_addr addr;
  65         int     onoff;
  66 } *hosts;
  67
  68 int nports, nhosts, protos;
  69
  70 static void changeitems(char *, int);
  71 static int selectproto(char *);
  72 static void showprotos(void);
  73 static int selectport(long, int);
  74 static void showports(void);
  75 static int selecthost(struct in_addr *, int);
  76 static void showhosts(void);
  77
  78 int
  79 netcmd(char *cmd, char *args)
  80 {
  81
  82         if (prefix(cmd, "proto")) {
  83                 if (*args == '\0') {
  84                         move(CMDLINE, 0);
  85                         clrtoeol();
  86                         addstr("which proto?");
  87                 } else if (!selectproto(args)) {
  88                         error("%s: Unknown protocol.", args);
  89                 }
  90                 return (1);
  91         }
  92         if (prefix(cmd, "ignore") || prefix(cmd, "display")) {
  93                 changeitems(args, prefix(cmd, "display"));
  94                 return (1);
  95         }
  96         if (prefix(cmd, "reset")) {
  97                 selectproto(0);
  98                 selecthost(0, 0);
  99                 selectport(-1, 0);
 100                 return (1);
 101         }
 102         if (prefix(cmd, "show")) {
 103                 move(CMDLINE, 0); clrtoeol();
 104                 if (*args == '\0') {
 105                         showprotos();
 106                         showhosts();
 107                         showports();
 108                         return (1);
 109                 }
 110                 if (prefix(args, "protos"))
 111                         showprotos();
 112                 else if (prefix(args, "hosts"))
 113                         showhosts();
 114                 else if (prefix(args, "ports"))
 115                         showports();
 116                 else
 117                         addstr("show what?");
 118                 return (1);
 119         }
 120         return (0);
 121 }
 122
 123
 124 static void
 125 changeitems(char *args, int onoff)
 126 {
 127         register char *cp;
 128         struct servent *sp;
 129         struct hostent *hp;
 130         struct in_addr in;
 131
 132         cp = strchr(args, '\n');
 133         if (cp)
 134                 *cp = '\0';
 135         for (;;args = cp) {
 136                 for (cp = args; *cp && isspace(*cp); cp++)
 137                         ;
 138                 args = cp;
 139                 for (; *cp && !isspace(*cp); cp++)
 140                         ;
 141                 if (*cp)
 142                         *cp++ = '\0';
 143                 if (cp - args == 0)
 144                         break;
 145                 sp = getservbyname(args,
 146                     protos == TCP ? "tcp" : protos == UDP ? "udp" : 0);
 147                 if (sp) {
 148                         selectport(sp->s_port, onoff);
 149                         continue;
 150                 }
 151                 hp = gethostbyname(args);
 152                 if (hp == 0) {
 153                         in.s_addr = inet_addr(args);
 154                         if (in.s_addr == -1) {
 155                                 error("%s: unknown host or port", args);
 156                                 continue;
 157                         }
 158                 } else
 159                         in = *(struct in_addr *)hp->h_addr;
 160                 selecthost(&in, onoff);
 161         }
 162 }
 163
 164 static int
 165 selectproto(char *proto)
 166 {
 167
 168         if (proto == 0 || streq(proto, "all"))
 169                 protos = TCP | UDP;
 170         else if (streq(proto, "tcp"))
 171                 protos = TCP;
 172         else if (streq(proto, "udp"))
 173                 protos = UDP;
 174         else
 175                 return (0);
 176
 177         return (protos);
 178 }
 179
 180 static void
 181 showprotos(void)
 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(long port, int onoff)
 199 {
 200         register struct pitem *p;
 201
 202         if (port == -1) {
 203                 if (ports == 0)
 204                         return (0);
 205                 free((char *)ports), ports = 0;
 206                 nports = 0;
 207                 return (1);
 208         }
 209         for (p = ports; p < ports+nports; p++)
 210                 if (p->port == port) {
 211                         p->onoff = onoff;
 212                         return (0);
 213                 }
 214         if (nports == 0)
 215                 ports = (struct pitem *)malloc(sizeof (*p));
 216         else
 217                 ports = (struct pitem *)realloc(ports, (nports+1)*sizeof (*p));
 218         p = &ports[nports++];
 219         p->port = port;
 220         p->onoff = onoff;
 221         return (1);
 222 }
 223
 224 int
 225 checkport(register struct inpcb *inp)
 226 {
 227         register struct pitem *p;
 228
 229         if (ports)
 230         for (p = ports; p < ports+nports; p++)
 231                 if (p->port == inp->inp_lport || p->port == inp->inp_fport)
 232                         return (p->onoff);
 233         return (1);
 234 }
 235
 236 static void
 237 showports(void)
 238 {
 239         register struct pitem *p;
 240         struct servent *sp;
 241
 242         for (p = ports; p < ports+nports; p++) {
 243                 sp = getservbyport(p->port,
 244                     protos == TCP|UDP ? 0 : protos == TCP ? "tcp" : "udp");
 245                 if (!p->onoff)
 246                         addch('!');
 247                 if (sp)
 248                         printw("%s ", sp->s_name);
 249                 else
 250                         printw("%d ", p->port);
 251         }
 252 }
 253
 254 static int
 255 selecthost(struct in_addr *in, int onoff)
 256 {
 257         register struct hitem *p;
 258
 259         if (in == 0) {
 260                 if (hosts == 0)
 261                         return (0);
 262                 free((char *)hosts), hosts = 0;
 263                 nhosts = 0;
 264                 return (1);
 265         }
 266         for (p = hosts; p < hosts+nhosts; p++)
 267                 if (p->addr.s_addr == in->s_addr) {
 268                         p->onoff = onoff;
 269                         return (0);
 270                 }
 271         if (nhosts == 0)
 272                 hosts = (struct hitem *)malloc(sizeof (*p));
 273         else
 274                 hosts = (struct hitem *)realloc(hosts, (nhosts+1)*sizeof (*p));
 275         p = &hosts[nhosts++];
 276         p->addr = *in;
 277         p->onoff = onoff;
 278         return (1);
 279 }
 280
 281 int
 282 checkhost(register struct inpcb *inp)
 283 {
 284         register struct hitem *p;
 285
 286         if (hosts)
 287         for (p = hosts; p < hosts+nhosts; p++)
 288                 if (p->addr.s_addr == inp->inp_laddr.s_addr ||
 289                     p->addr.s_addr == inp->inp_faddr.s_addr)
 290                         return (p->onoff);
 291         return (1);
 292 }
 293
 294 static void
 295 showhosts(void)
 296 {
 297         register struct hitem *p;
 298         struct hostent *hp;
 299
 300         for (p = hosts; p < hosts+nhosts; p++) {
 301                 hp = gethostbyaddr((char *)&p->addr, sizeof (p->addr), AF_INET);
 302                 if (!p->onoff)
 303                         addch('!');
 304                 printw("%s ", hp ? hp->h_name : (char *)inet_ntoa(p->addr));
 305         }
 306 }