4.3BSD - /usr/src/ucb/systat/netcmds.c

   1: /*
   2:  * Copyright (c) 1980 Regents of the University of California.
   3:  * All rights reserved.  The Berkeley software License Agreement
   4:  * specifies the terms and conditions for redistribution.
   5:  */
   6: 
   7: #ifndef lint
   8: static char sccsid[] = "@(#)netcmds.c	5.2 (Berkeley) 12/11/85";
   9: #endif not lint
  10: 
  11: /*
  12:  * Common network command support routines.
  13:  */
  14: #include "systat.h"
  15: #include <ctype.h>
  16: 
  17: #include <sys/socket.h>
  18: #include <sys/socketvar.h>
  19: #include <sys/mbuf.h>
  20: #include <sys/protosw.h>
  21: 
  22: #include <net/route.h>
  23: #include <netinet/in_systm.h>
  24: #include <netinet/in_pcb.h>
  25: 
  26: #define streq(a,b)  (strcmp(a,b)==0)
  27: 
  28: netcmd(cmd, args)
  29:     char *cmd, *args;
  30: {
  31: 
  32:     if (prefix(cmd, "tcp") || prefix(cmd, "udp")) {
  33:         selectproto(cmd);
  34:         return (1);
  35:     }
  36:     if (prefix(cmd, "ignore") || prefix(cmd, "display")) {
  37:         changeitems(args, prefix(cmd, "display"));
  38:         return (1);
  39:     }
  40:     if (prefix(cmd, "reset")) {
  41:         selectproto(0);
  42:         selecthost(0);
  43:         selectport(-1);
  44:         return (1);
  45:     }
  46:     if (prefix(cmd, "show")) {
  47:         move(CMDLINE, 0); clrtoeol();
  48:         if (*args == '\0') {
  49:             showprotos();
  50:             showhosts();
  51:             showports();
  52:             return (1);
  53:         }
  54:         if (prefix(args, "protos"))
  55:             showprotos();
  56:         else if (prefix(args, "hosts"))
  57:             showhosts();
  58:         else if (prefix(args, "ports"))
  59:             showports();
  60:         else
  61:             addstr("show what?");
  62:         return (1);
  63:     }
  64:     return (0);
  65: }
  66: 
  67: static
  68: changeitems(args, onoff)
  69:     char *args;
  70:     int onoff;
  71: {
  72:     register char *cp;
  73:     struct servent *sp;
  74:     struct hostent *hp;
  75:     struct in_addr in;
  76:     char *index();
  77: 
  78:     cp = index(args, '\n');
  79:     if (cp)
  80:         *cp = '\0';
  81:     for (;;args = cp) {
  82:         for (cp = args; *cp && isspace(*cp); cp++)
  83:             ;
  84:         args = cp;
  85:         for (; *cp && !isspace(*cp); cp++)
  86:             ;
  87:         if (*cp)
  88:             *cp++ = '\0';
  89:         if (cp - args == 0)
  90:             break;
  91:         sp = getservbyname(args,
  92:             protos == TCP ? "tcp" : protos == UDP ? "udp" : 0);
  93:         if (sp) {
  94:             selectport(sp->s_name, onoff);
  95:             continue;
  96:         }
  97:         hp = gethostbyname(args);
  98:         if (hp == 0) {
  99:             in.s_addr = inet_addr(args);
 100:             if (in.s_addr == -1) {
 101:                 error("%s: unknown host or port", args);
 102:                 continue;
 103:             }
 104:         } else
 105:             in = *(struct in_addr *)hp->h_addr;
 106:         selecthost(&in, onoff);
 107:     }
 108: }
 109: 
 110: static
 111: selectproto(proto)
 112:     char *proto;
 113: {
 114:     int new = protos;
 115: 
 116:     if (proto == 0 || streq(proto, "all"))
 117:         new = TCP|UDP;
 118:     else if (streq(proto, "tcp"))
 119:         new = TCP;
 120:     else if (streq(proto, "udp"))
 121:         new = UDP;
 122:     return (new != protos, protos = new);
 123: }
 124: 
 125: static
 126: showprotos()
 127: {
 128: 
 129:     if ((protos&TCP) == 0)
 130:         addch('!');
 131:     addstr("tcp ");
 132:     if ((protos&UDP) == 0)
 133:         addch('!');
 134:     addstr("udp ");
 135: }
 136: 
 137: static  struct pitem {
 138:     long    port;
 139:     int onoff;
 140: } *ports;
 141: 
 142: static
 143: selectport(port, onoff)
 144:     long port;
 145:     int onoff;
 146: {
 147:     register struct pitem *p;
 148: 
 149:     if (port == -1) {
 150:         if (ports == 0)
 151:             return (0);
 152:         free((char *)ports), ports = 0;
 153:         nports = 0;
 154:         return (1);
 155:     }
 156:     for (p = ports; p < ports+nports; p++)
 157:         if (p->port == port) {
 158:             p->onoff = onoff;
 159:             return (0);
 160:         }
 161:     if (nports == 0)
 162:         ports = (struct pitem *)malloc(sizeof (*p));
 163:     else
 164:         ports = (struct pitem *)realloc(ports, (nports+1)*sizeof (*p));
 165:     p = &ports[nports++];
 166:     p->port = port;
 167:     p->onoff = onoff;
 168:     return (1);
 169: }
 170: 
 171: checkport(inp)
 172:     register struct inpcb *inp;
 173: {
 174:     register struct pitem *p;
 175: 
 176:     if (ports)
 177:     for (p = ports; p < ports+nports; p++)
 178:         if (p->port == inp->inp_lport || p->port == inp->inp_fport)
 179:             return (p->onoff);
 180:     return (1);
 181: }
 182: 
 183: static
 184: showports()
 185: {
 186:     register struct pitem *p;
 187:     struct servent *sp;
 188: 
 189:     for (p = ports; p < ports+nports; p++) {
 190:         sp = getservbyport(p->port,
 191:             protos == TCP|UDP ? 0 : protos == TCP ? "tcp" : "udp");
 192:         if (!p->onoff)
 193:             addch('!');
 194:         if (sp)
 195:             printw("%s ", sp->s_name);
 196:         else
 197:             printw("%d ", p->port);
 198:     }
 199: }
 200: 
 201: static  struct hitem {
 202:     struct  in_addr addr;
 203:     int onoff;
 204: } *hosts;
 205: 
 206: static
 207: selecthost(in, onoff)
 208:     struct in_addr *in;
 209: {
 210:     register struct hitem *p;
 211: 
 212:     if (in == 0) {
 213:         if (hosts == 0)
 214:             return (0);
 215:         free((char *)hosts), hosts = 0;
 216:         nhosts = 0;
 217:         return (1);
 218:     }
 219:     for (p = hosts; p < hosts+nhosts; p++)
 220:         if (p->addr.s_addr == in->s_addr) {
 221:             p->onoff = onoff;
 222:             return (0);
 223:         }
 224:     if (nhosts == 0)
 225:         hosts = (struct hitem *)malloc(sizeof (*p));
 226:     else
 227:         hosts = (struct hitem *)realloc(hosts, (nhosts+1)*sizeof (*p));
 228:     p = &hosts[nhosts++];
 229:     p->addr = *in;
 230:     p->onoff = onoff;
 231:     return (1);
 232: }
 233: 
 234: checkhost(inp)
 235:     register struct inpcb *inp;
 236: {
 237:     register struct hitem *p;
 238: 
 239:     if (hosts)
 240:     for (p = hosts; p < hosts+nhosts; p++)
 241:         if (p->addr.s_addr == inp->inp_laddr.s_addr ||
 242:             p->addr.s_addr == inp->inp_faddr.s_addr)
 243:             return (p->onoff);
 244:     return (1);
 245: }
 246: 
 247: static
 248: showhosts()
 249: {
 250:     register struct hitem *p;
 251:     struct hostent *hp;
 252: 
 253:     for (p = hosts; p < hosts+nhosts; p++) {
 254:         hp = gethostbyaddr(&p->addr, sizeof (p->addr), AF_INET);
 255:         if (!p->onoff)
 256:             addch('!');
 257:         printw("%s ", hp ? hp->h_name : inet_ntoa(p->addr));
 258:     }
 259: }

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