// --- 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 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] \n" " %s [-v] /\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; }