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/*
* Copyright (c) 2004-2005 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.
*/
#include "base/misc.hh"
#include "dev/pktfifo.hh"
using namespace std;
bool
PacketFifo::copyout(void *dest, int offset, int len)
{
char *data = (char *)dest;
if (offset + len >= size())
return false;
list<EthPacketPtr>::iterator p = fifo.begin();
list<EthPacketPtr>::iterator end = fifo.end();
while (len > 0) {
while (offset >= (*p)->length) {
offset -= (*p)->length;
++p;
}
if (p == end)
panic("invalid fifo");
int size = min((*p)->length - offset, len);
memcpy(data, (*p)->data, size);
offset = 0;
len -= size;
data += size;
++p;
}
return true;
}
void
PacketFifo::serialize(const string &base, ostream &os)
{
paramOut(os, base + ".size", _size);
paramOut(os, base + ".maxsize", _maxsize);
paramOut(os, base + ".reserved", _reserved);
paramOut(os, base + ".packets", fifo.size());
int i = 0;
list<EthPacketPtr>::iterator p = fifo.begin();
list<EthPacketPtr>::iterator end = fifo.end();
while (p != end) {
(*p)->serialize(csprintf("%s.packet%d", base, i), os);
++p;
++i;
}
}
void
PacketFifo::unserialize(const string &base, Checkpoint *cp,
const string §ion)
{
paramIn(cp, section, base + ".size", _size);
// paramIn(cp, section, base + ".maxsize", _maxsize);
paramIn(cp, section, base + ".reserved", _reserved);
int fifosize;
paramIn(cp, section, base + ".packets", fifosize);
fifo.clear();
for (int i = 0; i < fifosize; ++i) {
EthPacketPtr p = new EthPacketData(16384);
p->unserialize(csprintf("%s.packet%d", base, i), cp, section);
fifo.push_back(p);
}
}
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