inet.cc revision 1078
1/* 2 * Copyright (c) 2002-2003 The Regents of The University of Michigan 3 * 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 are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; 9 * redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution; 12 * neither the name of the copyright holders nor the names of its 13 * contributors may be used to endorse or promote products derived from 14 * this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29#include <sstream> 30#include <string> 31 32#include "base/cprintf.hh" 33#include "sim/host.hh" 34#include "base/inet.hh" 35 36using namespace std; 37string 38eaddr_string(const uint8_t a[6]) 39{ 40 stringstream stream; 41 ccprintf(stream, "%x:%x:%x:%x:%x:%x", a[0], a[1], a[2], a[3], a[4], a[5]); 42 43 return stream.str(); 44} 45 46uint16_t 47IpHdr::ip_cksum() const 48{ 49 uint16_t sum = ip_cksum_add(this, hlen(), 0); 50 return ip_cksum_carry(sum); 51} 52 53uint16_t 54IpHdr::tu_cksum() const 55{ 56 uint16_t sum = ip_cksum_add(payload(), len() - hlen(), 0); 57 sum = ip_cksum_add(&ip_src, 4, sum); 58 sum = ip_cksum_add(&ip_dst, 4, sum); 59 sum += htons(ip_p + ip_len); 60 return ip_cksum_carry(sum); 61} 62