1 files changed, 110 insertions, 0 deletions
diff --git a/src/dev/net/etherdump.cc b/src/dev/net/etherdump.cc
new file mode 100644
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+++ b/src/dev/net/etherdump.cc
@@ -0,0 +1,110 @@
+/*
+ * Copyright (c) 2002-2005 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.
+ *
+ * Authors: Nathan Binkert
+ */
+
+/* @file
+ * Simple object for creating a simple pcap style packet trace
+ */
+#include "dev/net/etherdump.hh"
+
+#include <sys/time.h>
+
+#include <algorithm>
+#include <string>
+
+#include "base/misc.hh"
+#include "base/output.hh"
+#include "sim/core.hh"
+
+using std::string;
+
+EtherDump::EtherDump(const Params *p)
+    : SimObject(p), stream(simout.create(p->file, true)),
+      maxlen(p->maxlen)
+{
+}
+
+#define DLT_EN10MB              1               // Ethernet (10Mb)
+#define TCPDUMP_MAGIC           0xa1b2c3d4
+#define PCAP_VERSION_MAJOR      2
+#define PCAP_VERSION_MINOR      4
+
+struct pcap_file_header {
+    uint32_t magic;
+    uint16_t version_major;
+    uint16_t version_minor;
+    int32_t thiszone;           // gmt to local correction
+    uint32_t sigfigs;           // accuracy of timestamps
+    uint32_t snaplen;           // max length saved portion of each pkt
+    uint32_t linktype;          // data link type (DLT_*)
+};
+
+struct pcap_pkthdr {
+    uint32_t seconds;
+    uint32_t microseconds;
+    uint32_t caplen;            // length of portion present
+    uint32_t len;               // length this packet (off wire)
+};
+
+void
+EtherDump::init()
+{
+    struct pcap_file_header hdr;
+    hdr.magic = TCPDUMP_MAGIC;
+    hdr.version_major = PCAP_VERSION_MAJOR;
+    hdr.version_minor = PCAP_VERSION_MINOR;
+
+    hdr.thiszone = 0;
+    hdr.snaplen = 1500;
+    hdr.sigfigs = 0;
+    hdr.linktype = DLT_EN10MB;
+
+    stream->write(reinterpret_cast<char *>(&hdr), sizeof(hdr));
+
+    stream->flush();
+}
+
+void
+EtherDump::dumpPacket(EthPacketPtr &packet)
+{
+    pcap_pkthdr pkthdr;
+    pkthdr.seconds = curTick() / SimClock::Int::s;
+    pkthdr.microseconds = (curTick() / SimClock::Int::us) % ULL(1000000);
+    pkthdr.caplen = std::min(packet->length, maxlen);
+    pkthdr.len = packet->length;
+    stream->write(reinterpret_cast<char *>(&pkthdr), sizeof(pkthdr));
+    stream->write(reinterpret_cast<char *>(packet->data), pkthdr.caplen);
+    stream->flush();
+}
+
+EtherDump *
+EtherDumpParams::create()
+{
+    return new EtherDump(this);
+}