gem5/base/inet.hh
Nathan Binkert eaf66f4658 fix some bugs in the headers and fix checksumming.
base/inet.cc:
    we can't use a uint16_t for the intermediate checksum values
    since there may be some bits that carry.
    the length that is added in the pseudo header is the length of
    the tcp portion only.
base/inet.hh:
    silly me, the ip_hlen field is in terms of 4-byte words.
    when caclulating checksum, we're dealing with network byte order,
    so don't bother doing any byteswapping.

--HG--
extra : convert_revision : 993e3413e9febea0ba2fb6ba8bf04c053cca15ed
2004-10-01 19:48:33 -04:00

157 lines
5.5 KiB
C++

/*
* Copyright (c) 2002-2003 The Regents of The University of Michigan
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __BASE_INET_HH__
#define __BASE_INET_HH__
#include <string>
#include "dnet/os.h"
#include "dnet/eth.h"
#include "dnet/ip.h"
#include "dnet/ip6.h"
#include "dnet/addr.h"
#include "dnet/arp.h"
#include "dnet/icmp.h"
#include "dnet/tcp.h"
#include "dnet/udp.h"
#include "dnet/intf.h"
#include "dnet/route.h"
#include "dnet/fw.h"
#include "dnet/blob.h"
#include "dnet/rand.h"
#include "sim/host.hh"
std::string eaddr_string(const uint8_t a[6]);
struct EthHdr;
struct IpHdr;
struct TcpHdr;
struct UdpHdr;
struct EthHdr : protected eth_hdr
{
uint16_t type() const { return ntohs(eth_type); }
const IpHdr *ip() const
{ return type() == ETH_TYPE_IP ? (const IpHdr *)payload() : 0; }
IpHdr *ip()
{ return type() == ETH_TYPE_IP ? (IpHdr *)payload() : 0; }
bool unicast() { return eth_dst.data[0] == 0x00; }
bool multicast() { return eth_dst.data[0] == 0x01; }
bool broadcast() { return eth_dst.data[0] == 0xff; }
int size() const { return sizeof(EthHdr); }
const uint8_t *bytes() const { return (const uint8_t *)this; }
const uint8_t *payload() const { return bytes() + size(); }
uint8_t *bytes() { return (uint8_t *)this; }
uint8_t *payload() { return bytes() + size(); }
};
struct IpHdr : protected ip_hdr
{
uint8_t version() const { return ip_v; }
uint8_t hlen() const { return ip_hl * 4; }
uint8_t tos() const { return ip_tos; }
uint16_t len() const { return ntohs(ip_len); }
uint16_t id() const { return ntohs(ip_id); }
uint16_t frag_flags() const { return ntohs(ip_off) >> 13; }
uint16_t frag_off() const { return ntohs(ip_off) & 0x1fff; }
uint8_t ttl() const { return ip_ttl; }
uint8_t proto() const { return ip_p; }
uint16_t sum() const { return ip_sum; }
uint32_t src() const { return ntohl(ip_src); }
uint32_t dst() const { return ntohl(ip_dst); }
void sum(uint16_t sum) { ip_sum = sum; }
uint16_t ip_cksum() const;
uint16_t tu_cksum() const;
const TcpHdr *tcp() const
{ return proto() == IP_PROTO_TCP ? (const TcpHdr *)payload() : 0; }
const UdpHdr *udp() const
{ return proto() == IP_PROTO_UDP ? (const UdpHdr *)payload() : 0; }
TcpHdr *tcp()
{ return proto() == IP_PROTO_TCP ? (TcpHdr *)payload() : 0; }
UdpHdr *udp()
{ return proto() == IP_PROTO_UDP ? (UdpHdr *)payload() : 0; }
int size() const { return hlen(); }
const uint8_t *bytes() const { return (const uint8_t *)this; }
const uint8_t *payload() const { return bytes() + size(); }
uint8_t *bytes() { return (uint8_t *)this; }
uint8_t *payload() { return bytes() + size(); }
};
struct TcpHdr : protected tcp_hdr
{
uint16_t sport() const { return ntohs(th_sport); }
uint16_t dport() const { return ntohs(th_dport); }
uint32_t seq() const { return ntohl(th_seq); }
uint32_t ack() const { return ntohl(th_ack); }
uint8_t off() const { return th_off; }
uint8_t flags() const { return th_flags & 0x3f; }
uint16_t win() const { return ntohs(th_win); }
uint16_t sum() const { return th_sum; }
uint16_t urp() const { return ntohs(th_urp); }
void sum(uint16_t sum) { th_sum = sum; }
int size() const { return off(); }
const uint8_t *bytes() const { return (const uint8_t *)this; }
const uint8_t *payload() const { return bytes() + size(); }
uint8_t *bytes() { return (uint8_t *)this; }
uint8_t *payload() { return bytes() + size(); }
};
struct UdpHdr : protected udp_hdr
{
uint16_t sport() const { return ntohs(uh_sport); }
uint16_t dport() const { return ntohs(uh_dport); }
uint16_t len() const { return ntohs(uh_ulen); }
uint16_t sum() const { return ntohs(uh_sum); }
void sum(uint16_t sum) { uh_sum = htons(sum); }
int size() const { return sizeof(UdpHdr); }
const uint8_t *bytes() const { return (const uint8_t *)this; }
const uint8_t *payload() const { return bytes() + size(); }
uint8_t *bytes() { return (uint8_t *)this; }
uint8_t *payload() { return bytes() + size(); }
};
#endif // __BASE_INET_HH__