1*7c478bd9Sstevel@tonic-gate /* 2*7c478bd9Sstevel@tonic-gate * Copyright (C) 1993-2001 by Darren Reed. 3*7c478bd9Sstevel@tonic-gate * 4*7c478bd9Sstevel@tonic-gate * See the IPFILTER.LICENCE file for details on licencing. 5*7c478bd9Sstevel@tonic-gate * 6*7c478bd9Sstevel@tonic-gate * $Id: fill6bits.c,v 1.5 2002/03/27 15:09:57 darrenr Exp $ 7*7c478bd9Sstevel@tonic-gate */ 8*7c478bd9Sstevel@tonic-gate 9*7c478bd9Sstevel@tonic-gate #include "ipf.h" 10*7c478bd9Sstevel@tonic-gate 11*7c478bd9Sstevel@tonic-gate 12*7c478bd9Sstevel@tonic-gate void fill6bits(bits, msk) 13*7c478bd9Sstevel@tonic-gate int bits; 14*7c478bd9Sstevel@tonic-gate u_int *msk; 15*7c478bd9Sstevel@tonic-gate { 16*7c478bd9Sstevel@tonic-gate if (bits == 0) { 17*7c478bd9Sstevel@tonic-gate msk[0] = 0; 18*7c478bd9Sstevel@tonic-gate msk[1] = 0; 19*7c478bd9Sstevel@tonic-gate msk[2] = 0; 20*7c478bd9Sstevel@tonic-gate msk[3] = 0; 21*7c478bd9Sstevel@tonic-gate return; 22*7c478bd9Sstevel@tonic-gate } 23*7c478bd9Sstevel@tonic-gate 24*7c478bd9Sstevel@tonic-gate msk[0] = 0xffffffff; 25*7c478bd9Sstevel@tonic-gate msk[1] = 0xffffffff; 26*7c478bd9Sstevel@tonic-gate msk[2] = 0xffffffff; 27*7c478bd9Sstevel@tonic-gate msk[3] = 0xffffffff; 28*7c478bd9Sstevel@tonic-gate 29*7c478bd9Sstevel@tonic-gate if (bits == 128) 30*7c478bd9Sstevel@tonic-gate return; 31*7c478bd9Sstevel@tonic-gate if (bits > 96) { 32*7c478bd9Sstevel@tonic-gate msk[3] = htonl(msk[3] << (128 - bits)); 33*7c478bd9Sstevel@tonic-gate } else if (bits > 64) { 34*7c478bd9Sstevel@tonic-gate msk[3] = 0; 35*7c478bd9Sstevel@tonic-gate msk[2] = htonl(msk[2] << (96 - bits)); 36*7c478bd9Sstevel@tonic-gate } else if (bits > 32) { 37*7c478bd9Sstevel@tonic-gate msk[3] = 0; 38*7c478bd9Sstevel@tonic-gate msk[2] = 0; 39*7c478bd9Sstevel@tonic-gate msk[1] = htonl(msk[1] << (64 - bits)); 40*7c478bd9Sstevel@tonic-gate } else { 41*7c478bd9Sstevel@tonic-gate msk[3] = 0; 42*7c478bd9Sstevel@tonic-gate msk[2] = 0; 43*7c478bd9Sstevel@tonic-gate msk[1] = 0; 44*7c478bd9Sstevel@tonic-gate msk[0] = htonl(msk[0] << (32 - bits)); 45*7c478bd9Sstevel@tonic-gate } 46*7c478bd9Sstevel@tonic-gate } 47