Update copyright dates and author list SConscript: arch/alpha/alpha_linux_process.cc: arch/alpha/alpha_linux_process.hh: arch/alpha/alpha_memory.cc: arch/alpha/alpha_memory.hh: arch/alpha/alpha_tru64_process.cc: arch/alpha/alpha_tru64_process.hh: arch/alpha/aout_machdep.h: arch/alpha/arguments.cc: arch/alpha/arguments.hh: arch/alpha/ev5.cc: arch/alpha/ev5.hh: arch/alpha/faults.cc: arch/alpha/faults.hh: arch/alpha/isa_desc: arch/alpha/isa_traits.hh: arch/alpha/osfpal.cc: arch/alpha/osfpal.hh: arch/alpha/pseudo_inst.cc: arch/alpha/pseudo_inst.hh: arch/alpha/vptr.hh: arch/alpha/vtophys.cc: arch/alpha/vtophys.hh: base/bitfield.hh: base/callback.hh: base/circlebuf.cc: base/circlebuf.hh: base/cprintf.cc: base/cprintf.hh: base/cprintf_formats.hh: base/crc.hh: base/date.cc: base/dbl_list.hh: base/endian.hh: base/fast_alloc.cc: base/fast_alloc.hh: base/fifo_buffer.cc: base/fifo_buffer.hh: base/hashmap.hh: base/hostinfo.cc: base/hostinfo.hh: base/hybrid_pred.cc: base/hybrid_pred.hh: base/inet.cc: base/inet.hh: base/inifile.cc: base/inifile.hh: base/intmath.cc: base/intmath.hh: base/match.cc: base/match.hh: base/misc.cc: base/misc.hh: base/mod_num.hh: base/mysql.cc: base/mysql.hh: base/output.cc: base/output.hh: base/pollevent.cc: base/pollevent.hh: base/predictor.hh: base/random.cc: base/random.hh: base/range.cc: base/range.hh: base/refcnt.hh: base/remote_gdb.cc: base/remote_gdb.hh: base/res_list.hh: base/sat_counter.cc: base/sat_counter.hh: base/sched_list.hh: base/socket.cc: base/socket.hh: base/statistics.cc: base/statistics.hh: base/compression/lzss_compression.cc: base/compression/lzss_compression.hh: base/compression/null_compression.hh: base/loader/aout_object.cc: base/loader/aout_object.hh: base/loader/ecoff_object.cc: base/loader/ecoff_object.hh: base/loader/elf_object.cc: base/loader/elf_object.hh: base/loader/object_file.cc: base/loader/object_file.hh: base/loader/symtab.cc: base/loader/symtab.hh: base/stats/events.cc: base/stats/events.hh: base/stats/flags.hh: base/stats/mysql.cc: base/stats/mysql.hh: base/stats/mysql_run.hh: base/stats/output.hh: base/stats/statdb.cc: base/stats/statdb.hh: base/stats/text.cc: base/stats/text.hh: base/stats/types.hh: base/stats/visit.cc: base/stats/visit.hh: base/str.cc: base/str.hh: base/time.cc: base/time.hh: base/timebuf.hh: base/trace.cc: base/trace.hh: base/userinfo.cc: base/userinfo.hh: build/SConstruct: cpu/base.cc: cpu/base.hh: cpu/base_dyn_inst.cc: cpu/base_dyn_inst.hh: cpu/exec_context.cc: cpu/exec_context.hh: cpu/exetrace.cc: cpu/exetrace.hh: cpu/inst_seq.hh: cpu/intr_control.cc: cpu/intr_control.hh: cpu/memtest/memtest.cc: cpu/pc_event.cc: cpu/pc_event.hh: cpu/smt.hh: cpu/static_inst.cc: cpu/static_inst.hh: cpu/memtest/memtest.hh: cpu/o3/sat_counter.cc: cpu/o3/sat_counter.hh: cpu/ozone/cpu.hh: cpu/simple/cpu.cc: cpu/simple/cpu.hh: cpu/trace/opt_cpu.cc: cpu/trace/opt_cpu.hh: cpu/trace/reader/ibm_reader.cc: cpu/trace/reader/ibm_reader.hh: cpu/trace/reader/itx_reader.cc: cpu/trace/reader/itx_reader.hh: cpu/trace/reader/m5_reader.cc: cpu/trace/reader/m5_reader.hh: cpu/trace/reader/mem_trace_reader.cc: cpu/trace/reader/mem_trace_reader.hh: cpu/trace/trace_cpu.cc: cpu/trace/trace_cpu.hh: dev/alpha_access.h: dev/alpha_console.cc: dev/alpha_console.hh: dev/baddev.cc: dev/baddev.hh: dev/disk_image.cc: dev/disk_image.hh: dev/etherbus.cc: dev/etherbus.hh: dev/etherdump.cc: dev/etherdump.hh: dev/etherint.cc: dev/etherint.hh: dev/etherlink.cc: dev/etherlink.hh: dev/etherpkt.cc: dev/etherpkt.hh: dev/ethertap.cc: dev/ethertap.hh: dev/ide_ctrl.cc: dev/ide_ctrl.hh: dev/ide_disk.cc: dev/ide_disk.hh: dev/io_device.cc: dev/io_device.hh: dev/ns_gige.cc: dev/ns_gige.hh: dev/ns_gige_reg.h: dev/pciconfigall.cc: dev/pciconfigall.hh: dev/pcidev.cc: dev/pcidev.hh: dev/pcireg.h: dev/pktfifo.cc: dev/pktfifo.hh: dev/platform.cc: dev/platform.hh: dev/simconsole.cc: dev/simconsole.hh: dev/simple_disk.cc: dev/simple_disk.hh: dev/sinic.cc: dev/sinic.hh: dev/sinicreg.hh: dev/tsunami.cc: dev/tsunami.hh: dev/tsunami_cchip.cc: dev/tsunami_cchip.hh: dev/tsunami_io.cc: dev/tsunami_io.hh: dev/tsunami_pchip.cc: dev/tsunami_pchip.hh: dev/tsunamireg.h: dev/uart.cc: dev/uart.hh: dev/uart8250.cc: dev/uart8250.hh: docs/stl.hh: encumbered/cpu/full/op_class.hh: kern/kernel_stats.cc: kern/kernel_stats.hh: kern/linux/linux.hh: kern/linux/linux_syscalls.cc: kern/linux/linux_syscalls.hh: kern/linux/linux_system.cc: kern/linux/linux_system.hh: kern/linux/linux_threadinfo.hh: kern/linux/printk.cc: kern/linux/printk.hh: kern/system_events.cc: kern/system_events.hh: kern/tru64/dump_mbuf.cc: kern/tru64/dump_mbuf.hh: kern/tru64/mbuf.hh: kern/tru64/printf.cc: kern/tru64/printf.hh: kern/tru64/tru64.hh: kern/tru64/tru64_events.cc: kern/tru64/tru64_events.hh: kern/tru64/tru64_syscalls.cc: kern/tru64/tru64_syscalls.hh: kern/tru64/tru64_system.cc: kern/tru64/tru64_system.hh: python/SConscript: python/m5/__init__.py: python/m5/config.py: python/m5/convert.py: python/m5/multidict.py: python/m5/smartdict.py: sim/async.hh: sim/builder.cc: sim/builder.hh: sim/debug.cc: sim/debug.hh: sim/eventq.cc: sim/eventq.hh: sim/host.hh: sim/main.cc: sim/param.cc: sim/param.hh: sim/process.cc: sim/process.hh: sim/root.cc: sim/serialize.cc: sim/serialize.hh: sim/sim_events.cc: sim/sim_events.hh: sim/sim_exit.hh: sim/sim_object.cc: sim/sim_object.hh: sim/startup.cc: sim/startup.hh: sim/stat_control.cc: sim/stat_control.hh: sim/stats.hh: sim/syscall_emul.cc: sim/syscall_emul.hh: sim/system.cc: sim/system.hh: test/bitvectest.cc: test/circletest.cc: test/cprintftest.cc: test/genini.py: test/initest.cc: test/lru_test.cc: test/nmtest.cc: test/offtest.cc: test/paramtest.cc: test/rangetest.cc: test/sized_test.cc: test/stattest.cc: test/strnumtest.cc: test/symtest.cc: test/tokentest.cc: test/tracetest.cc: util/ccdrv/devtime.c: util/m5/m5.c: util/oprofile-top.py: util/rundiff: util/m5/m5op.h: util/m5/m5op.s: util/stats/db.py: util/stats/dbinit.py: util/stats/display.py: util/stats/info.py: util/stats/print.py: util/stats/stats.py: util/tap/tap.cc: Update copyright dates and author list --HG-- extra : convert_revision : 0faba08fc0fc0146f1efb7f61e4b043c020ff9e4
343 lines
8.5 KiB
C++
343 lines
8.5 KiB
C++
/*
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* Copyright (c) 2003-2005 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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* Interface to connect a simulated ethernet device to the real world
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*/
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#if defined(__OpenBSD__) || defined(__APPLE__)
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#include <sys/param.h>
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#endif
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#include <netinet/in.h>
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#include <unistd.h>
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#include <deque>
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#include <string>
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#include "base/misc.hh"
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#include "base/pollevent.hh"
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#include "base/socket.hh"
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#include "base/trace.hh"
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#include "dev/etherdump.hh"
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#include "dev/etherint.hh"
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#include "dev/etherpkt.hh"
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#include "dev/ethertap.hh"
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#include "sim/builder.hh"
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using namespace std;
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/**
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*/
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class TapListener
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{
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protected:
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/**
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*/
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class Event : public PollEvent
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{
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protected:
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TapListener *listener;
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public:
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Event(TapListener *l, int fd, int e)
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: PollEvent(fd, e), listener(l) {}
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virtual void process(int revent) { listener->accept(); }
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};
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friend class Event;
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Event *event;
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protected:
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ListenSocket listener;
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EtherTap *tap;
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int port;
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public:
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TapListener(EtherTap *t, int p)
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: event(NULL), tap(t), port(p) {}
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~TapListener() { if (event) delete event; }
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void accept();
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void listen();
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};
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void
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TapListener::listen()
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{
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while (!listener.listen(port, true)) {
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DPRINTF(Ethernet, "TapListener(listen): Can't bind port %d\n", port);
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port++;
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}
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ccprintf(cerr, "Listening for tap connection on port %d\n", port);
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event = new Event(this, listener.getfd(), POLLIN|POLLERR);
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pollQueue.schedule(event);
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}
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void
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TapListener::accept()
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{
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if (!listener.islistening())
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panic("TapListener(accept): cannot accept if we're not listening!");
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int sfd = listener.accept(true);
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if (sfd != -1)
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tap->attach(sfd);
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}
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/**
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*/
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class TapEvent : public PollEvent
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{
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protected:
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EtherTap *tap;
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public:
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TapEvent(EtherTap *_tap, int fd, int e)
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: PollEvent(fd, e), tap(_tap) {}
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virtual void process(int revent) { tap->process(revent); }
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};
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EtherTap::EtherTap(const string &name, EtherDump *d, int port, int bufsz)
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: EtherInt(name), event(NULL), socket(-1), buflen(bufsz), dump(d),
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txEvent(this)
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{
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buffer = new char[buflen];
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listener = new TapListener(this, port);
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listener->listen();
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}
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EtherTap::~EtherTap()
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{
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if (event)
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delete event;
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if (buffer)
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delete [] buffer;
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delete listener;
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}
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void
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EtherTap::attach(int fd)
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{
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if (socket != -1)
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close(fd);
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buffer_offset = 0;
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data_len = 0;
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socket = fd;
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DPRINTF(Ethernet, "EtherTap attached\n");
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event = new TapEvent(this, socket, POLLIN|POLLERR);
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pollQueue.schedule(event);
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}
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void
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EtherTap::detach()
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{
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DPRINTF(Ethernet, "EtherTap detached\n");
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delete event;
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event = 0;
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close(socket);
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socket = -1;
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}
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bool
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EtherTap::recvPacket(PacketPtr packet)
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{
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if (dump)
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dump->dump(packet);
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DPRINTF(Ethernet, "EtherTap output len=%d\n", packet->length);
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DDUMP(EthernetData, packet->data, packet->length);
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u_int32_t len = htonl(packet->length);
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write(socket, &len, sizeof(len));
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write(socket, packet->data, packet->length);
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recvDone();
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return true;
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}
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void
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EtherTap::sendDone()
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{}
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void
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EtherTap::process(int revent)
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{
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if (revent & POLLERR) {
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detach();
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return;
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}
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char *data = buffer + sizeof(u_int32_t);
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if (!(revent & POLLIN))
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return;
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if (buffer_offset < data_len + sizeof(u_int32_t)) {
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int len = read(socket, buffer + buffer_offset, buflen - buffer_offset);
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if (len == 0) {
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detach();
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return;
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}
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buffer_offset += len;
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if (data_len == 0)
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data_len = ntohl(*(u_int32_t *)buffer);
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DPRINTF(Ethernet, "Received data from peer: len=%d buffer_offset=%d "
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"data_len=%d\n", len, buffer_offset, data_len);
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}
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while (data_len != 0 && buffer_offset >= data_len + sizeof(u_int32_t)) {
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PacketPtr packet;
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packet = new PacketData(data_len);
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packet->length = data_len;
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memcpy(packet->data, data, data_len);
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buffer_offset -= data_len + sizeof(u_int32_t);
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assert(buffer_offset >= 0);
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if (buffer_offset > 0) {
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memmove(buffer, data + data_len, buffer_offset);
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data_len = ntohl(*(u_int32_t *)buffer);
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} else
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data_len = 0;
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DPRINTF(Ethernet, "EtherTap input len=%d\n", packet->length);
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DDUMP(EthernetData, packet->data, packet->length);
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if (!sendPacket(packet)) {
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DPRINTF(Ethernet, "bus busy...buffer for retransmission\n");
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packetBuffer.push(packet);
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if (!txEvent.scheduled())
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txEvent.schedule(curTick + retryTime);
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} else if (dump) {
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dump->dump(packet);
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}
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}
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}
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void
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EtherTap::retransmit()
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{
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if (packetBuffer.empty())
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return;
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PacketPtr packet = packetBuffer.front();
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if (sendPacket(packet)) {
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if (dump)
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dump->dump(packet);
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DPRINTF(Ethernet, "EtherTap retransmit\n");
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packetBuffer.front() = NULL;
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packetBuffer.pop();
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}
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if (!packetBuffer.empty() && !txEvent.scheduled())
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txEvent.schedule(curTick + retryTime);
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}
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//=====================================================================
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void
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EtherTap::serialize(ostream &os)
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{
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SERIALIZE_SCALAR(socket);
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SERIALIZE_SCALAR(buflen);
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SERIALIZE_ARRAY((uint8_t *)buffer,buflen);
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SERIALIZE_SCALAR(buffer_offset);
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SERIALIZE_SCALAR(data_len);
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bool tapevent_present = false;
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if (event) {
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tapevent_present = true;
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SERIALIZE_SCALAR(tapevent_present);
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event->serialize(os);
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}
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else {
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SERIALIZE_SCALAR(tapevent_present);
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}
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}
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void
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EtherTap::unserialize(Checkpoint *cp, const std::string §ion)
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{
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UNSERIALIZE_SCALAR(socket);
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UNSERIALIZE_SCALAR(buflen);
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UNSERIALIZE_ARRAY((uint8_t *)buffer,buflen);
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UNSERIALIZE_SCALAR(buffer_offset);
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UNSERIALIZE_SCALAR(data_len);
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bool tapevent_present;
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UNSERIALIZE_SCALAR(tapevent_present);
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if (tapevent_present) {
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event = new TapEvent(this, socket, POLLIN|POLLERR);
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event->unserialize(cp,section);
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if (event->queued()) {
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pollQueue.schedule(event);
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}
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}
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}
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//=====================================================================
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BEGIN_DECLARE_SIM_OBJECT_PARAMS(EtherTap)
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SimObjectParam<EtherInt *> peer;
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SimObjectParam<EtherDump *> dump;
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Param<unsigned> port;
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Param<unsigned> bufsz;
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END_DECLARE_SIM_OBJECT_PARAMS(EtherTap)
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BEGIN_INIT_SIM_OBJECT_PARAMS(EtherTap)
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INIT_PARAM_DFLT(peer, "peer interface", NULL),
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INIT_PARAM_DFLT(dump, "object to dump network packets to", NULL),
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INIT_PARAM_DFLT(port, "tap port", 3500),
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INIT_PARAM_DFLT(bufsz, "tap buffer size", 10000)
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END_INIT_SIM_OBJECT_PARAMS(EtherTap)
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CREATE_SIM_OBJECT(EtherTap)
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{
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EtherTap *tap = new EtherTap(getInstanceName(), dump, port, bufsz);
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if (peer) {
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tap->setPeer(peer);
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peer->setPeer(tap);
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}
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return tap;
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}
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REGISTER_SIM_OBJECT("EtherTap", EtherTap)
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