138 lines
3.7 KiB
C++
138 lines
3.7 KiB
C++
/*
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* Copyright (c) 2003 The Regents of The University of Michigan
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/* @file
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* Reference counted class containing ethernet packet data
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*/
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#ifndef __ETHERPKT_HH__
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#define __ETHERPKT_HH__
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#include <iosfwd>
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#include <memory>
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#include "sim/host.hh"
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#include "base/refcnt.hh"
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#define EADDR_LEN 6
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class Checkpoint;
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struct pseudo_header
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{
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uint32_t src_ip_addr;
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uint32_t dest_ip_addr;
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uint16_t protocol;
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uint16_t len;
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};
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/** Ethernet header struct for casting purposes */
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struct eth_header
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{
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uint8_t dest[EADDR_LEN];
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uint8_t src[EADDR_LEN];
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uint16_t type;
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};
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struct ip_header
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{
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uint8_t vers_len;
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uint8_t service_type;
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uint16_t dgram_len;
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uint16_t ID;
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uint16_t flags_frag_offset;
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uint8_t TTL;
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uint8_t protocol;
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uint16_t hdr_chksum;
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uint32_t src_ip_addr;
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uint32_t dest_ip_addr;
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uint8_t *options;
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uint8_t *transport_header;
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};
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struct tcp_header
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{
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uint16_t src_port_num;
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uint16_t dest_port_num;
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uint32_t seq_num;
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uint32_t ack_num;
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uint8_t hdr_len;
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uint8_t flags;
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uint16_t rcv_window;
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uint16_t chksum;
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uint16_t urgent;
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uint8_t *options;
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uint8_t *data;
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};
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struct udp_header
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{
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uint16_t src_port_num;
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uint16_t dest_port_num;
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uint16_t len;
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uint16_t chksum;
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uint8_t *data;
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};
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/*
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* Reference counted class containing ethernet packet data
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*/
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class EtherPacket : public RefCounted
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{
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public:
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uint8_t *data;
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int length;
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public:
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EtherPacket() : data(NULL), length(0) {}
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EtherPacket(std::auto_ptr<uint8_t> d, int l)
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: data(d.release()), length(l) {}
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~EtherPacket() { if (data) delete [] data; }
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public:
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bool IsUnicast() { return data[0] == 0x00; }
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bool IsMulticast() { return data[0] == 0x01; }
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bool IsBroadcast() { return data[0] == 0xff; }
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ip_header *getIpHdr() { return (ip_header *) (data + 14); }
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void *getTransportHdr() {
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ip_header *ip = getIpHdr();
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return (void *) (ip + (ip->vers_len & 0xf));
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}
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typedef RefCountingPtr<EtherPacket> PacketPtr;
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void serialize(std::ostream &os);
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void unserialize(Checkpoint *cp, const std::string §ion);
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};
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typedef RefCountingPtr<EtherPacket> PacketPtr;
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#endif // __ETHERPKT_HH__
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