static uint64_t
e1000_mmio_read(void *opaque, hwaddr addr, unsigned size)
{
    E1000State *s = opaque;
    unsigned int index = (addr & 0x1ffff) >> 2;

    if (index < NREADOPS && macreg_readops[index])
    {
        return macreg_readops[index](s, index);
    }
    DBGOUT(UNKNOWN, "MMIO unknown read addr=0x%08x\n", index<<2);
    return 0;
}

if (mac_reg_access[index] & MAC_ACCESS_PARTIAL) {
   DBGOUT(GENERAL, "Reading register at offset: 0x%08x. "
                   "It is not fully implemented.\n", index<<2);
}

--- a/qemu-2.6.0/hw/net/e1000.c	2016-05-12 01:56:09.000000000 +1000
+++ b/qemu-2.6.0/hw/net/e1000.c	2016-08-14 19:09:34.133938177 +1000
@@ -1485,10 +1485,12 @@
     if (index < NWRITEOPS && macreg_writeops[index]) {
         if (!(mac_reg_access[index] & MAC_ACCESS_FLAG_NEEDED)
             || (s->compat_flags & (mac_reg_access[index] >> 2))) {
+            /*
             if (mac_reg_access[index] & MAC_ACCESS_PARTIAL) {
                 DBGOUT(GENERAL, "Writing to register at offset: 0x%08x. "
                        "It is not fully implemented.\n", index<<2);
             }
+            */
             macreg_writeops[index](s, index, val);
         } else {    /* "flag needed" bit is set, but the flag is not active */
             DBGOUT(MMIO, "MMIO write attempt to disabled reg. addr=0x%08x\n",
@@ -1512,10 +1514,12 @@
     if (index < NREADOPS && macreg_readops[index]) {
         if (!(mac_reg_access[index] & MAC_ACCESS_FLAG_NEEDED)
             || (s->compat_flags & (mac_reg_access[index] >> 2))) {
+            /*
             if (mac_reg_access[index] & MAC_ACCESS_PARTIAL) {
                 DBGOUT(GENERAL, "Reading register at offset: 0x%08x. "
                        "It is not fully implemented.\n", index<<2);
             }
+            */
             return macreg_readops[index](s, index);
         } else {    /* "flag needed" bit is set, but the flag is not active */
             DBGOUT(MMIO, "MMIO read attempt of disabled reg. addr=0x%08x\n",

static uint64_t
e1000_mmio_read(void *opaque, hwaddr addr, unsigned size)
{
    E1000State *s = opaque;
    unsigned int index = (addr & 0x1ffff) >> 2;

    if (index < NREADOPS && macreg_readops[index]) {
        if (!(mac_reg_access[index] & MAC_ACCESS_FLAG_NEEDED)
            || (s->compat_flags & (mac_reg_access[index] >> 2))) {
            if (mac_reg_access[index] & MAC_ACCESS_PARTIAL) {
                DBGOUT(GENERAL, "Reading register at offset: 0x%08x. "
                       "It is not fully implemented.\n", index<<2);
            }
            return macreg_readops[index](s, index);
        } else {    /* "flag needed" bit is set, but the flag is not active */
            DBGOUT(MMIO, "MMIO read attempt of disabled reg. addr=0x%08x\n",
                   index<<2);
        }
    } else {
        DBGOUT(UNKNOWN, "MMIO unknown read addr=0x%08x\n", index<<2);
    }
    return 0;
}

. . .
#define E1000_RDFH     0x02410  /* RX Data FIFO Head - RW */
#define E1000_RDFT     0x02418  /* RX Data FIFO Tail - RW */
. . .
#define E1000_82542_RDFH     E1000_RDFH
#define E1000_82542_RDFT     E1000_RDFT
. . .

$ sudo modprobe -r e1000
$ sudo modprobe -v e1000 debug=16
insmod /lib/modules/4.6.4-1-ARCH/kernel/drivers/net/ethernet/intel/e1000/e1000.ko.gz debug=1

$ cat /sys/module/e1000/parameters/copybreak
256
$ ls -al /sys/module/e1000/parameters/
-rw-r--r-- 1 root root 4096 авг 11 23:18 copybreak

$ systool -v -m e1000
Module = "e1000"

  Attributes:
    coresize            = "122880"
    initsize            = "0"
    initstate           = "live"
    refcnt              = "0"
    srcversion          = "9695902D12379E95A2112CA"
    taint               = ""
    uevent              = <store method only>
    version             = "7.3.21-k8-NAPI"

  Parameters:
    copybreak           = "256"

[  750.833637] br0: port 2(tap0) entered disabled state

[  702.144847] kvm: zapping shadow pages for mmio generation wraparound
[  702.145724] kvm: zapping shadow pages for mmio generation wraparound

$ sudo modprobe e1000 debug=16
$ systool -v -m e1000
Module = "e1000"

  Attributes:
    coresize            = "122880"
    initsize            = "0"
    initstate           = "live"
    refcnt              = "0"
    srcversion          = "9695902D12379E95A2112CA"
    taint               = ""
    uevent              = <store method only>
    version             = "7.3.21-k8-NAPI"

  Parameters:
    copybreak           = "256"

  Sections:
    .bss                = "0xffffffffa0817f80"
    .data               = "0xffffffffa0816000"
    .data..read_mostly  = "0xffffffffa0817c18"
    .data.unlikely      = "0xffffffffa0817c1c"
    .exit.text          = "0xffffffffa080fa39"
    .gnu.linkonce.this_module= "0xffffffffa0817c40"
    .init.text          = "0xffffffffa07bd000"
    .note.gnu.build-id  = "0xffffffffa0810000"
    .parainstructions   = "0xffffffffa0814ab8"
    .rodata             = "0xffffffffa0810040"
    .rodata.str1.1      = "0xffffffffa08120c0"
    .rodata.str1.8      = "0xffffffffa0812ca8"
    .smp_locks          = "0xffffffffa0812c10"
    .strtab             = "0xffffffffa07c1e70"
    .symtab             = "0xffffffffa07be000"
    .text               = "0xffffffffa07fc000"
    .text.unlikely      = "0xffffffffa080f426"
    __bug_table         = "0xffffffffa0814b74"
    __mcount_loc        = "0xffffffffa0814e80"
    __param             = "0xffffffffa0814c28"
    __verbose           = "0xffffffffa08169a8"

$ brctl show
bridge name     bridge id               STP enabled     interfaces
br0             8000.002354ed7e4c       no              eth0
                                                        tap0
$ qemu-system-x86_64 \
  -m 1024 \
  -nographic \
  -smp cores=2,sockets=8 \
  -enable-kvm \
  -drive file="vios-adventerprisek9-m-15.6.2T.qcow2",if=virtio \
  -net nic,vlan=0,macaddr=00:aa:00:00:03:01,model=e1000 \
  -net tap,ifname=tap0,vlan=0,script=no,downscript=no

Booted IOSv. Boot args: [/vios-adventerprisek9-m]

Smart Init is enabled

              Restricted Rights Legend

Use, duplication, or disclosure by the Government is
subject to restrictions as set forth in subparagraph
(c) of the Commercial Computer Software - Restricted
Rights clause at FAR sec. 52.227-19 and subparagraph
(c) (1) (ii) of the Rights in Technical Data and Computer
Software clause at DFARS sec. 252.227-7013.

           cisco Systems, Inc.
           170 West Tasman Drive
           San Jose, California 95134-1706
Cisco IOS Software, IOSv Software (VIOS-ADVENTERPRISEK9-M), Version 15.6(2)T, RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2016 by Cisco Systems, Inc.
Compiled Tue 22-Mar-16 16:19 by prod_rel_team
This product contains cryptographic features and is subject to United
States and local country laws governing import, export, transfer and
use. Delivery of Cisco cryptographic products does not imply
third-party authority to import, export, distribute or use encryption.
Importers, exporters, distributors and users are responsible for
compliance with U.S. and local country laws. By using this product you
agree to comply with applicable laws and regulations. If you are unable
to comply with U.S. and local laws, return this product immediately.

A summary of U.S. laws governing Cisco cryptographic products may be found at:
http://www.cisco.com/wwl/export/crypto/tool/stqrg.html

If you require further assistance please contact us by sending email to
[email protected]

Cisco IOSv (revision 1.0) with  with 1021177K/25600K bytes of memory.Installed image archive
e1000: Reading register at offset: 0x00002410. It is not fully implemented.
e1000: Reading register at offset: 0x00002418. It is not fully implemented.

Processor board ID 95F1YHINODNGKNAH3GLYQ
1 Gigabit Ethernet interface
DRAM configuration is 72 bits wide with parity disabled.
256K bytes of non-volatile configuration memory.
2097152K bytes of ATA System CompactFlash 0 (Read/Write)
0K bytes of ATA CompactFlash 1 (Read/Write)
0K bytes of ATA CompactFlash 2 (Read/Write)
0K bytes of ATA CompactFlash 3 (Read/Write)
e1000: Reading register at offset: 0x00002410. It is not fully implemented.
e1000: Reading register at offset: 0x00002418. It is not fully implemented.
e1000: Reading register at offset: 0x00002410. It is not fully implemented.
e1000: Reading register at offset: 0x00002418. It is not fully implemented.

$ dmesg
...
[  523.701545] e1000: Intel(R) PRO/1000 Network Driver - version 7.3.21-k8-NAPI
[  523.701548] e1000: Copyright (c) 1999-2006 Intel Corporation.
[  554.652536] IPv6: ADDRCONF(NETDEV_CHANGE): tap0: link becomes ready
[  554.652575] br0: port 2(tap0) entered blocking state
[  554.652577] br0: port 2(tap0) entered forwarding state
[  555.234045] kvm: zapping shadow pages for mmio generation wraparound
[  555.234823] kvm: zapping shadow pages for mmio generation wraparound
[  620.832080] br0: port 2(tap0) entered disabled state
[  701.664149] br0: port 2(tap0) entered blocking state
[  701.664154] br0: port 2(tap0) entered forwarding state
[  702.144847] kvm: zapping shadow pages for mmio generation wraparound
[  702.145724] kvm: zapping shadow pages for mmio generation wraparound
[  750.833637] br0: port 2(tap0) entered disabled state

$ systool -v -m kvm
Module = "kvm"

  Attributes:
    coresize            = "499712"
    initsize            = "0"
    initstate           = "live"
    refcnt              = "1"
    taint               = ""
    uevent              = <store method only>

  Parameters:
    allow_unsafe_assigned_interrupts= "N"
    halt_poll_ns        = "400000"
    halt_poll_ns_grow   = "2"
    halt_poll_ns_shrink = "0"
    ignore_msrs         = "N"
    kvmclock_periodic_sync= "Y"
    lapic_timer_advance_ns= "0"
    min_timer_period_us = "500"
    mmu_audit           = "N"
    tsc_tolerance_ppm   = "250"
    vector_hashing      = "Y"

$ systool -v -m kvm_intel
Module = "kvm_intel"

  Attributes:
    coresize            = "184320"
    initsize            = "0"
    initstate           = "live"
    refcnt              = "0"
    taint               = ""
    uevent              = <store method only>

  Parameters:
    emulate_invalid_guest_state= "Y"
    enable_apicv        = "N"
    enable_shadow_vmcs  = "N"
    ept                 = "Y"
    eptad               = "N"
    fasteoi             = "Y"
    flexpriority        = "Y"
    nested              = "Y"
    ple_gap             = "0"
    ple_window_grow     = "2"
    ple_window_max      = "1073741823"
    ple_window_shrink   = "0"
    ple_window          = "4096"
    pml                 = "N"
    unrestricted_guest  = "N"
    vmm_exclusive       = "Y"
    vpid                = "Y"

$ qemu-system-x86_64 \
  -m 1024 \
  -nographic \
  -smp cores=2,sockets=8 \
  -enable-kvm \
  -drive file="IOSv-L3.qcow2",if=ide \
  -net socket,connect=localhost:9002,vlan=10 \
  -net nic,vlan=10,model=e1000,macaddr=00:01:00:ff:03:01

$ uname -a
Linux osiris 4.6.4-1-ARCH #1 SMP PREEMPT Mon Jul 11 19:12:32 CEST 2016 x86_64 GNU/Linux

$ qemu-system-x86_64 --version
QEMU emulator version 2.6.0, Copyright (c) 2003-2008 Fabrice Bellard

Cisco IOSv (revision 1.0) with  with 1021185K/25600K bytes of memory.Installed image archive

Processor board ID 9GVPXCRKO5K8655EEJU85
1 Gigabit Ethernet interface
DRAM configuration is 72 bits wide with parity disabled.
256K bytes of non-volatile configuration memory.
2097144K bytes of ATA System CompactFlash 0 (Read/Write)
0K bytes of ATA CompactFlash 1 (Read/Write)
0K bytes of ATA CompactFlash 2 (Read/Write)
0K bytes of ATA CompactFlash 3 (Read/Write)

e1000: Reading register at offset: 0x00002410. It is not fully implemented.
e1000: Reading register at offset: 0x00002418. It is not fully implemented.
e1000: Reading register at offset: 0x00002410. It is not fully implemented.
e1000: Reading register at offset: 0x00002418. It is not fully implemented.

#!/bin/bash

HOST=`echo $1 | awk -F"://" '{print $2}' | cut -d/ -f1`
INT=`echo $1 | awk -F"://" '{print $2}' | cut -d/ -f2 | sed 's/vunl_/vunl0_/'`

wireshark -k -i <(ssh -l root $HOST tcpdump -s 0 -U -n -v -w - -i $INT)

[Desktop Entry]
Version=1.0
Name=Capture UNL
Generic Name=Capture UNL
Comment=Capture UNL
Icon=wireshark
Exec=/usr/local/sbin/capture %U
TryExec=/usr/local/sbin/capture
Terminal=false
Type=Application
Categories=Network;Capture;Internet;
MimeType=x-scheme-handler/capture
X-KDE-Protocols=capture
Keywords=Wireshark;Capture;Network;Internet;Client;

$ xdg-mime default 'Capture UNL.desktop' x-scheme-handler/capture

$ xdg-mime query default x-scheme-handler/telnet
ktelnetservice5.desktop