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