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// --- T2-COPYRIGHT-NOTE-BEGIN ---
// This copyright note is auto-generated by ./scripts/Create-CopyPatch.
//
// T2 SDE: package/.../iproute2/ipnm2nwbc.c
// Copyright (C) 2004 - 2006 The T2 SDE Project
// Copyright (C) 1998 - 2003 Clifford Wolf
//
// More information can be found in the files COPYING and README.
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; version 2 of the License. A copy of the
// GNU General Public License can be found in the file COPYING.
// --- T2-COPYRIGHT-NOTE-END ---
#include <stdio.h>
int getbits(int n) {
int rc=0;
while (n) {
if (n&1) rc++;
n = n >> 1;
}
return rc;
}
int setbits(int n) {
int rc=0;
while (n--) {
rc = (rc>>1)|(1<<7);
}
return rc;
}
int main(int argc, char ** argv) {
int ip[4],nm[4],nw[4],bc[4],c;
int verbose=0,nmbits=0,n;
if ( argc > 1 && !strcmp(argv[1],"-v") ) verbose=1;
if ( argc == 3+verbose &&
sscanf(argv[1+verbose],"%d.%d.%d.%d",ip,ip+1,ip+2,ip+3) == 4 &&
sscanf(argv[2+verbose],"%d.%d.%d.%d",nm,nm+1,nm+2,nm+3) == 4 ) {
nmbits=getbits(nm[0])+getbits(nm[1])+
getbits(nm[2])+getbits(nm[3]);
} else if ( argc == 2+verbose && sscanf(argv[1+verbose],
"%d.%d.%d.%d/%d",ip,ip+1,ip+2,ip+3,&nmbits) == 5 ) {
n=nmbits;
if (n>0) { nm[0]=setbits(n>8?8:n); n-=8; } else nm[0]=0;
if (n>0) { nm[1]=setbits(n>8?8:n); n-=8; } else nm[1]=0;
if (n>0) { nm[2]=setbits(n>8?8:n); n-=8; } else nm[2]=0;
if (n>0) { nm[3]=setbits(n>8?8:n); n-=8; } else nm[3]=0;
} else {
fprintf(stderr,"\n"
"IP and Netmask to Network and Broadcast converter.\n"
"(C) under GPL, 1999 Clifford Wolf\n\n"
"Usage: %s [-v] <IP> <Netmask>\n"
" %s [-v] <IP>/<Mask>\n\n"
"Examples: %s -v 195.170.70.72/25\n"
" %s 195.170.70.72 255.255.255.128\n\n",
argv[0],argv[0],argv[0],argv[0]);
return 1;
}
for (c=0; c<4; c++) {
nw[c]=ip[c]&nm[c];
bc[c]=nw[c]|(255&~nm[c]);
}
if ( verbose ) {
printf("Network: %d.%d.%d.%d / %d\n",
nw[0],nw[1],nw[2],nw[3],nmbits);
printf("Netmask: %d.%d.%d.%d\n",
nm[0],nm[1],nm[2],nm[3]);
printf("Broadcast: %d.%d.%d.%d\n",
bc[0],bc[1],bc[2],bc[3]);
} else {
printf("%d.%d.%d.%d %d.%d.%d.%d\n",nw[0],nw[1],
nw[2],nw[3],bc[0],bc[1],bc[2],bc[3]);
}
return 0;
}