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| author |   aliguori <aliguori@c046a42c-6fe2-441c-8c8c-71466251a162> | 2009-04-21 19:56:28 +0000 |
|---|---|---|
| committer | aliguori <aliguori@c046a42c-6fe2-441c-8c8c-71466251a162> | 2009-04-21 19:56:28 +0000 |
| commit | bb9ea79e7a177acce6f8017eef794662ee219c97 (patch) | |
| tree | dd78593ce2df52356b297dae8185a0cc5bd2e0e4 /qemu-options.hx | |
| parent | Allow empty params for check_params (Jan Kiszka) (diff) | |
| download | qemu-kvm-bb9ea79e7a177acce6f8017eef794662ee219c97.tar.gz qemu-kvm-bb9ea79e7a177acce6f8017eef794662ee219c97.tar.bz2 qemu-kvm-bb9ea79e7a177acce6f8017eef794662ee219c97.zip | |
net: Add support for capturing VLANs (Jan Kiszka)
This patch is derived from Tristan Gingold's patch. It adds a new VLAN
client type that writes all traffic on the VLAN it is attached to into a
pcap file. Such a file can then be analyzed offline with Wireshark or
tcpdump.
Besides rebasing and some minor cleanups, the major differences to the
original version are:
- support for enabling/disabling via the monitor (host_net_add/remove)
- no special ordering of VLAN client list, qemu_send_packet now takes
care of properly ordered packets
- 64k default capturing limit (I hate tcpdump's default)
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@7200 c046a42c-6fe2-441c-8c8c-71466251a162
Diffstat (limited to 'qemu-options.hx')
| -rw-r--r-- | qemu-options.hx | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/qemu-options.hx b/qemu-options.hx index 1d783e561..718b10a91 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -745,6 +745,8 @@ DEF("net", HAS_ARG, QEMU_OPTION_net, \ " Use group 'groupname' and mode 'octalmode' to change default\n" " ownership and permissions for communication port.\n" #endif + "-net dump[,vlan=n][,file=f][,len=n]\n" + " dump traffic on vlan 'n' to file 'f' (max n bytes per packet)\n" "-net none use it alone to have zero network devices; if no -net option\n" " is provided, the default is '-net nic -net user'\n") STEXI @@ -865,6 +867,11 @@ vde_switch -F -sock /tmp/myswitch qemu linux.img -net nic -net vde,sock=/tmp/myswitch @end example +@item -net dump[,vlan=@var{n}][,file=@var{file}][,len=@var{len}] +Dump network traffic on VLAN @var{n} to file @var{file} (@file{qemu-vlan0.pcap} by default). +At most @var{len} bytes (64k by default) per packet are stored. The file format is +libpcap, so it can be analyzed with tools such as tcpdump or Wireshark. + @item -net none Indicate that no network devices should be configured. It is used to override the default configuration (@option{-net nic -net user}) which |