From 4a92671188aeee02bcfa0499fb9383097329b4bb Mon Sep 17 00:00:00 2001 From: MaMe82 Date: Mon, 26 Nov 2018 18:20:46 +0100 Subject: [PATCH] Updated README, started LICENSING --- DISCLAIMER.md | 14 + LICENSE | 674 ++++++++++++++++++++++++++++++++++++++++++++ README.md | 272 +++++++++++++++++- netlink/LICENSE | 191 +++++++++++++ netlink/NOTICE | 16 ++ netlink/README.md | 12 + netlink/docker.diff | 513 +++++++++++++++++++++++++++++++++ 7 files changed, 1684 insertions(+), 8 deletions(-) create mode 100644 DISCLAIMER.md create mode 100644 LICENSE create mode 100644 netlink/LICENSE create mode 100644 netlink/NOTICE create mode 100644 netlink/README.md create mode 100644 netlink/docker.diff diff --git a/DISCLAIMER.md b/DISCLAIMER.md new file mode 100644 index 0000000..4b064b6 --- /dev/null +++ b/DISCLAIMER.md @@ -0,0 +1,14 @@ +DISCLAIMER +========== + +**P4wnP1 A.L.O.A.** is dedicated to penetration testers, redteamers and InfoSec personal. +It should be used for authorized testing and/or educational purposes only. +The only exception is using it against devices or a network, owned by yourself. + +I take no responsibility for the abuse of P4wnP1 A.L.O.A. or any information given in the +related documents. + +**I DO NOT GRANT PERMISSIONS TO USE P4wnP1 A.L.O.A. TO BREAK THE LAW.** + +As P4wnP1 A.L.O.A. is in alpha stage, it is likely that bugs occur. +I disclaim any warranty for P4wnP1 A.L.O.A., it is provided "as is". diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..94a9ed0 --- /dev/null +++ b/LICENSE @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. By contrast, +the GNU General Public License is intended to guarantee your freedom to +share and change all versions of a program--to make sure it remains free +software for all its users. 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It is safest +to attach them to the start of each source file to most effectively +state the exclusion of warranty; and each file should have at least +the "copyright" line and a pointer to where the full notice is found. + + + Copyright (C) + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + Copyright (C) + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. diff --git a/README.md b/README.md index 900c6b6..8641e07 100644 --- a/README.md +++ b/README.md @@ -1208,13 +1208,208 @@ You have learned about the very basic workflow concepts of P4wnP1 A.L.O.A. ## 3. Where to go from here -Under construction +It is currently not possible to provide a full documentations. So here are some comments on topics which haven't been +touched, yet, but are worth investigating. -- bash scripts -- GPIO -- nexmon (karma) -- WiFi covert channel example -- bluetooth NAP +### BashScripts + +P4wnP1 allows running BashScripts from TriggerActions. The scripts which are usable from TriggerActions are homed at +`/usr/local/P4wnP1/scripts`. If a script is called from a TriggerAction, several arguments (like the actual trigger) are +handed in via bash variables. The file `/usr/local/P4wnP1/scripts/trigger-aware.sh` provides a nice example of a bash +script which acts differently, depending on the calling trigger. It is worth having a look onto this script, as it uses +all "TriggerAction variables" currently available. + +### GPIO + +The community of the old P4wnP1 version occasionally came up with hardware mods or extensions of the Rapsberry PI and +the question how to integrate them. It isn't possible for me to provide a generic solution to this problem. Neither +is it a good idea, to provide support for a very specific hardware extension, which is only used by a few people. With +the introduction of TriggerAction the idea came up, to support GPIO as both, Triggers via GPIO input and Actions issuing +GPIO output. Although not planned for the first release, this feature has already been implemented. I still haven't +had the time to document it and it could easily happen that some things change. The functionality uses the "periph.io" +library with some minor extension (customized edge detection with custom de-bounce for GPIO, thanks to @marcaruel for +exchange on this) + +### nexmon KARMA + +The WiFi firmware included with P4wnP1 A.L.O.A. has been modified (utilizing nexmon framework) to support KARMA. +This feature hasn't made it into the core so far (needs some rework firmware-wise) and thus isn't available from +webclient or CLI. If you want to play around with the karma features, there is a legacy python CLI, which allows setting +the KARMA options on the fly. The python script could be found here: +`/usr/local/P4wnP1/legacy/karmatool.py` + +Tip: To get most out of the KARMA functionality, you should setup P4wnP1 A.L.O.A. to provide a WiFi Access Point without +authentication, otherwise it wouldn't make to much sense. For poor beacon flooding this isn't needed, but (static) +custom SSIDs for beaconing are limited in their number (saving resources on the WiFi chip) + +### WiFi covert channel + +The WiFi covert channel hasn't been ported to Go and isn't part of the P4wnP1 core. Anyways, the legacy functionality +is provided. In order to make the covert channel run, several conditions have to be met: +- a keystroke injection has to be applied to the target client to inject stage1 +- stage1 loads stage2 over a (simplified version) of the HID covert channel, thus a special USB HID device has to be +provided and a special HID covert channel server has to be started on P4wnP1, in order to provide stage2 +- a second server has to be started and interface the modified WiFi firmware, in order to manage client connecting +in via the WiFi covert channel and provide interactive shell access to those clients (the server is a console +application which is meant to run in a terminal multiplexer, like `screen`) + +All of the aforementioned conditions could be fulfilled using P4wnP1 A.L.O.A.'s feature set, if the needed components +(HID stager, WiFi cover channel server, client agent to deliver) are provided. + +To carry out such a task with P4wnP1 A.L.O.A. is a great example for its capabilities. Additionally it helps to +distinguish what P4wnP1 A.L.O.A. is meant to be and what is not meant to be. + +P4wnP1 A.L.O.A. is not meant to: +- be a "weaponized" tool +- provide RTR payloads, which could be carried out by everybody, without understanding what's going on or which risks +are involved + +P4wnP1 A.L.O.A. is meant to: +- be a flexible, low-cost, pocket sized platform +- serve as enabler for tasks like the one described here +- support prototyping, testing and carrying out all kinds of USB related tasks, commonly used during pentest or +redteam engagements, without providing a finalized static solution + +In set sense, the `/usr/local/P4wnP1/legacy` folder homes the needed external tools to run the WiFi covert channel +(namely the WiFi server, the HID covert channel stager server and the WiFi covert channel client agent). Those +components could be considered as external parts (don't belong to P4wnP1 A.L.O.A. core). + +Additionally P4wnP1 A.L.O.A. provides a configuration, which utilizes the given components to do the following things: +- drive-by against Windows hosts in order to deliver in-memory client code to download stage2 via HID covert channel, +based on keystroke injection (HIDScript) +- starting the keystroke injection, as soon as P4wnP1 is connected to a USB host (TriggerAction issuing HIDScript) +- bring up the stager, which delivers the WiFi covert channel client agent via HID covert channel, as soon as the +keystroke injection starts (TriggerAction running a bash script, which again starts the external server) +- bring up the WiFi covert channel server, when needed (same TriggerAction and BashScript) +- deploy a USB setup which provides a USB keyboard (to allow keystroke injection) and an additional raw HID device +(serves as covert channel for stage2 delivery) - the USB settings are stored in a settings template +- deploy a WiFi setup, which allows remote access to P4wnP1, in order to allow interaction with the CLI frontend of +the WiFi covert channel server - the WiFi settings are stored in a settings template +- provide a single point of entry, to deploy all the needed configurations at once (done by a Master Template, which +consists of proper WiFi settings, proper USB settings and the TriggerActions needed to start the HIDScript) + +The Master Template is called "wifi covert channel". By deploying it from the "generic settings" tap of the webclient +("DEPLOY STORED" from the Master Template Editor) P4wnP1 A.L.O.A. is ready configured to execute all the describe steps. + +As soon as it is re-attached to a USB host, it should start typing out stage1 and the according servers are started +internally. +From a SSH session (for example over WiFi) the WiFi covert channel server could be accessed using `screen -d -r wifi_c2` +to interact with clients, which connected back over the WiFi covert channel. +As the keystroke injection depends on the USB hosts language layout, the according HIDScript called +`wifi_covert_channel.js` has a variable `language` which could be used to adjust the keyboard layout in use. +Additionally there is a variable called `hide` (false by default). If `hide` is set to true, the console Window on +the client gets hidden while stage1 is typed. This, again, pinpoints how complex tasks could be reduced to a simple bool +variable, thanks to HIDScript and the backing JavaScript engine. + +The "wifi covert channel" demo provided with P4wnP1's Master Templates could be used as Startup Master Template, too, as +WiFi access is still possible and thus the setup could be changed again, remotely at any time. + +The involved BashScript, which is called from a TriggerAction is a good example how flexible the CLI client could get. +As the HID stager needs to know on which device file to listen (the one which represents the generic HID device), but +this information is only available at runtime (depends on enabled USB gadget functions), the script requests the CLI +to report the correct HID device by running `hidraw=$(P4wnP1_cli usb get device raw)`. + +The full BashScript is hosted in the folder `/usr/local/P4wnP1/scripts`, as all bash scripts which should be accessible +from TriggerActions. + +### Bluetooth NAP + +P4wnP1 provides Bluetooth based network functionality over the Bluetooth Network Encapsulation Protocol (BNEP). +The currently most interesting feature is the Bluetooth Network Access Point (NAP), which allows IP based Bluetooth +remote access to P4wnP1, for example from mobiles. + +In order to use this feature some things should be known: +- The bluetooth network interface, called `bteth` could be configured and templated like the other network interfaces +(webclient or CLI) +- In order to allow NAP access from an Android mobile (iPhone untested), the mobile not only needs to connect, but +additionally P4wnP1 has to hand out a proper IP for the default gateway on the `bteth` interface via DHCP. This is, +because the mobile wants to use the NAP as gateway to the Internet (which would be the intended use). If the NAP itself +wouldn't provide a gateway, the Android Mobile would do no further requests after the DHCP D.O.R.A. The easiest way to +overcome this, is to instruct the DHCP server to provide the IP of the `bteth` interface itself as default gateway +(DHCP option 3). Even if there is no real upstream connection, this worked during my tests - as the mobile has to access +the gateway with layer3 communication in order to "phone home". Even if successive connectivity tests fail, the working +layer 3 connection persists. This allows, for example, SSH access via Bluetooth. With "High Speed" enabled, the +webclient works pretty nice, too. +- In order to allow PIN based pairing Simple Secure Pairing (SSP) has to be disabled. If SSP is enabled, the running +Pairing agent confirms every passkey (which means even less security than with legacy PIN pairing, as every device is +able to connect). Maybe a confirmation dialog for SSP based passkey pairing will be implemented for the CLI/webclient +in future, but currently this is out of scope. I highly suggest to disable "discoverable" and "bondable" if SSP is in +use, as soon as the intended device has paired. +- Another shortcoming of having SSP disabled, is that "High Speed" wouldn't be usable for bluetooth conections (or +to enable High Speed, pairing has to be done with SSP). Without "High Speed" enabled (uses 802.11 frames for +communication) it would take about 10 minutes to request the webclient, with high speed enabled it takes some seconds. +Using SSH and the CLI client over a NAP without "High Speed" should be fine, though. +- The default Bluetooth network interface settings (`bteth_startup`) and the default Bluetooth settings (`startup`) +should allow "Low Speed" access over SSH with legacy PIN pairing. The PIN is `1337` and could be changed from the +webclient. + +### TriggerAction Groups + +The TriggerActions come with a nice rooting capability called "Groups". I didn't managed to come up with a feature demo +in time, but I'm planning to include an example for an LED based 4 bit binary counter (using GPIOs, a toggle switch +and 4 LEDs). + +The idea of groups is the following: + +Consider you want to have 4 TriggerActions (TAs) firing on the exact same Trigger (for example "on attached to USB host"). +You could achieve this by creating 4 TAs, each with the Trigger "on attached to USB host". + +Alternatively, you could bring up a TriggerAction which sends the value `1` to a group named `"connected"` when the +"on attached to USB host" occurs. Now you define your other 4 TriggerActions to fire when the value `1` is received on +a group named `"connected"`. The result would be the same and not make too much sense for now (in fact it needs one +more TriggerAction). The only positive effect, for now, is that the TriggerActions are slightly more readable, thanks +to the group name, which could be chosen freely. + +Now the first advanced thing you could do, is to run the following CLI command: + +``` +P4wnP1_cli trigger send --group-name=connected --group-value=1 +``` + +This command would have the exatc same effect as the "on attached to USB host" host TriggerAction and all 4 other +TAs, which are waiting for the value `1` to arrive on the group `connected` would fire. As you maybe remember, the +CLI client could run remotely (from different platforms), so it could be used to Trigger command remotely. + +The Trigger which reacts on "Group channels" is called "value on group channel". The more interesting trigger is called +"multiple values on group channel". This "multiple values" trigger allows to listen for ordered sequences of values, or +one of multiple values or all values in an unordered sequence, before it fires. + +Let's say you qant to fire a BashScript, when these conditions are met: +- The WiFi AP is up +- P4wnP1 has been connected to a USB host + +You could create TAs for both events like this: +1) On "WiFi AP up" --> send value 1 to group "conditions" +2) On "attached to USB host" --> send value 2 to group "conditions" + +Now you could deploy a third TriggerAction like this +- On "multiple values on group channel"; values (1,2); type "All (logical AND)" --> start bash script + +In this configuration, the bash script would only start if both "condition" Trigger have fired. + +If "exact ordered sequence" would have been used, instead of "All (logical AND)" for the type, the bash script would +only start if the WiFi AP come up before the USB connected Trigger (not the otherway around). In combination with GPIO +triggers, this could for example be used, to trigger actions based on the input of a simple PIN pad. + +I'm sure you have some nice usage ideas for "group" channels. + +Worth mentioning: + +The CLI client is able to do a blocking wait, till a dedicated value arrives on a "group channel", using a command like +this: + +``` +P4wnP1_cli trigger wait --group-name=waitgroup --group-value=1 +``` + +This could be used, to drive scripts from TriggerActions, utilizing the CLI (with their full power like GPIO). + + +Work in progress, missing sections: +- HIDScript Trigger variables (variables handed in to HIDScripts fired from TriggerActions) +- HIDScript helpers (powershell functions) +- HIDScript demo snake (mouse) +- USB Mass storage ## 4. Rescue: Help, I can't reach P4wnP1 A.L.O.A. as i messed up the configuration @@ -1277,7 +1472,68 @@ Sorry, seems you have to recreate your P4wnP1 A.L.O.A. SD crad from a clean imag ## 5. Credits -Under construction +Under construction, random order -## 6. Licencing (3rd party under construction) +- @JohanBrandhorst (close exchange on gRPC-web via gopherjs, ridiculous fast implementation of +"websocket for server streaming", feature request) +- @steevdave, @_binkybear (kali build scripts, discussion ongoing exchange) +- @Re4sonKernel (Support on moving P4wnP1 kernel changes to a well maintained and popular repo, collaboration on Bluez +fixes) +- @SymbianSyMoh (Inspiration for HID attack re-trigger without reboot) +- @quasarframework (could list this under 3rd party libs, but the work done here is insane; the look&feel of the +P4wnP1 webclient is more or lees based on default components of this beautiful library) +- @CyberArms (one of the most early P4wnP1 supporters, writer of the best tutorial and even books on such topics) +- @LucaBongiorni (not only one of the earliest supporters, he does in hardware, what I'm only to do in software; he +gives talks on the USB topic and honors Open Source solutions, all in all a great guy and an inspiration) +- @evilsocket (his block pushed me towards Go, a great OSS developer, read his code and you know what I mean) +- @RoganDawes and @Singe from @SensePost (inspiring guys) +- @Swiftb0y (Early supporter, creator of the "old" P4wnP1 WiKi, early tester for ideas on P4wnP1 A.L.O.A.) +- @marcaruel (discussion on GPIO edge detection using periph.io) +## 6. ToDos and support + +This isn't a full fledged ToDo list, but some milestones are left and I'd be happy to receive som community support on +this +- Porting the full HID covert channel functionality to Go core (I'm on my own with that) +- **add Bluetooth configuration command for CLI** +- **Create missing keyboard layouts** (currently only "us" and "de" are supported, as this has been a low priority task +during development of core features) +- extend Bluetooth functionality to allow connection to other discoverable devices (authentication and trust) +- move WiFi KARMA functionality from dedicated python tool to P4wnP1 core (with webclient support)) +- Create full documentation for HIDScript (basically only the mouse part is missing) +- Create full documentation for P4wnP1 (hoping for community) +- Get rid of a remaining dependency on the docker netlink (see README of the `netlink` folder) + +Note on Bluetooth: + +P4wnP1 works with custom bindings to the Bluez API. Although the Bluez API supports Low Energy (GATT, +emulating peripherals etc.) it isn't planned to integrate this functionality into P4wnP1 A.L.O.A. + +Note on Nexmon: + +P4wnP1 utilizes nexmon. Most people know nexmon as a firmware modification which allows enabling monitor +mode and package injection for broadcom WiFi chips (including the BCM43430a1, which is used by the Raspberry Pi Zero W). +But nexmon is more, it is a framework which allows modifying ARM firmware blobs (after a bit of reversing), with patches +written in high level C code. P4wnP1 uses this framework, to apply custom patches to the WiFi firmware, which enable +hardware based KARMA support and firmware (as well as driver) support for the WiFi covert channel. It isn't the aim +of this modifications to provide proper monitor mode or injection support for the built-in WiFi interface. Although, +the legacy nexmon monitor mode functionality is included in the current WiFi firmware, it is considered "erroneous", as +it interferes with standard WiFi functionality used by P4wnP1 (crashes if the interface is used in station mode etc.). + +## 7. Copyright + + P4wnP1 A.L.O.A. + Copyright (C) 2018 Marcus Mengs + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . \ No newline at end of file diff --git a/netlink/LICENSE b/netlink/LICENSE new file mode 100644 index 0000000..2744858 --- /dev/null +++ b/netlink/LICENSE @@ -0,0 +1,191 @@ + + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. Definitions. + + "License" shall mean the terms and conditions for use, reproduction, + and distribution as defined by Sections 1 through 9 of this document. + + "Licensor" shall mean the copyright owner or entity authorized by + the copyright owner that is granting the License. + + "Legal Entity" shall mean the union of the acting entity and all + other entities that control, are controlled by, or are under common + control with that entity. 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In no event and under no legal theory, + whether in tort (including negligence), contract, or otherwise, + unless required by applicable law (such as deliberate and grossly + negligent acts) or agreed to in writing, shall any Contributor be + liable to You for damages, including any direct, indirect, special, + incidental, or consequential damages of any character arising as a + result of this License or out of the use or inability to use the + Work (including but not limited to damages for loss of goodwill, + work stoppage, computer failure or malfunction, or any and all + other commercial damages or losses), even if such Contributor + has been advised of the possibility of such damages. + + 9. Accepting Warranty or Additional Liability. While redistributing + the Work or Derivative Works thereof, You may choose to offer, + and charge a fee for, acceptance of support, warranty, indemnity, + or other liability obligations and/or rights consistent with this + License. However, in accepting such obligations, You may act only + on Your own behalf and on Your sole responsibility, not on behalf + of any other Contributor, and only if You agree to indemnify, + defend, and hold each Contributor harmless for any liability + incurred by, or claims asserted against, such Contributor by reason + of your accepting any such warranty or additional liability. + + END OF TERMS AND CONDITIONS + + Copyright 2014 Docker, Inc. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. diff --git a/netlink/NOTICE b/netlink/NOTICE new file mode 100644 index 0000000..fc79897 --- /dev/null +++ b/netlink/NOTICE @@ -0,0 +1,16 @@ +libcontainer +Copyright 2012-2015 Docker, Inc. + +This product includes software developed at Docker, Inc. (http://www.docker.com). + +The following is courtesy of our legal counsel: + + +Use and transfer of Docker may be subject to certain restrictions by the +United States and other governments. +It is your responsibility to ensure that your use and/or transfer does not +violate applicable laws. + +For more information, please see http://www.bis.doc.gov + +See also http://www.apache.org/dev/crypto.html and/or seek legal counsel. diff --git a/netlink/README.md b/netlink/README.md new file mode 100644 index 0000000..d72776d --- /dev/null +++ b/netlink/README.md @@ -0,0 +1,12 @@ +This folder contains an extended version of + +github.com/docker/libcontainer + +The changes to the original (which only consists of additions) could be seen in `docker.diff`. + +The LICENSE of the unmodified library applies (Apache-2.0). + +Please see the LICENSE and NOTICE file for details. + +It is planned to migrate the needed functionality of this library, which is needed to work for P4wnP1 A.L.O.A. to the +`mnetlink` library of this project, as soon as there is the time to do so. \ No newline at end of file diff --git a/netlink/docker.diff b/netlink/docker.diff new file mode 100644 index 0000000..421fee8 --- /dev/null +++ b/netlink/docker.diff @@ -0,0 +1,513 @@ +--- ../../docker/libcontainer/netlink/netlink_linux.go 2018-05-03 13:34:22.615800101 +0200 ++++ netlink/netlink_linux.go 2018-11-13 12:42:55.325253104 +0100 +@@ -11,6 +11,7 @@ + "syscall" + "time" + "unsafe" ++ "errors" + ) + + const ( +@@ -31,12 +32,24 @@ + ) + + const ( +- MACVLAN_MODE_PRIVATE = 1 << iota ++ MACVLAN_MODE_PRIVATE = 1 << iota + MACVLAN_MODE_VEPA + MACVLAN_MODE_BRIDGE + MACVLAN_MODE_PASSTHRU + ) + ++const ( ++ // See linux/if_arp.h. ++ // Note that Linux doesn't support IPv4 over IPv6 tunneling. ++ sysARPHardwareIPv4IPv4 = 768 // IPv4 over IPv4 tunneling ++ sysARPHardwareIPv6IPv6 = 769 // IPv6 over IPv6 tunneling ++ sysARPHardwareIPv6IPv4 = 776 // IPv6 over IPv4 tunneling ++ sysARPHardwareGREIPv4 = 778 // any over GRE over IPv4 tunneling ++ sysARPHardwareGREIPv6 = 823 // any over GRE over IPv6 tunneling ++) ++ ++var errNoSuchInterface = errors.New("no such network interface") ++ + var nextSeqNr uint32 + + type ifreqHwaddr struct { +@@ -143,6 +156,29 @@ + return syscall.SizeofIfAddrmsg + } + ++type RtGenmsg struct { ++ syscall.RtGenmsg ++} ++ ++func newRtGenMsg(family int) *RtGenmsg { ++ return &RtGenmsg{ ++ RtGenmsg: syscall.RtGenmsg{ ++ Family: uint8(family), ++ }, ++ } ++} ++ ++func (msg *RtGenmsg) ToWireFormat() []byte { ++ length := syscall.SizeofRtGenmsg ++ b := make([]byte, length) ++ b[0] = msg.Family ++ return b ++} ++ ++func (msg *RtGenmsg) Len() int { ++ return syscall.SizeofRtGenmsg ++} ++ + type RtMsg struct { + syscall.RtMsg + } +@@ -462,6 +498,78 @@ + return s.HandleAck(wb.Seq) + } + ++// see https://www.infradead.org/~tgr/libnl/doc/route.html ++ ++// Returns an array of IPNet for all the currently routed subnets on ipv4 ++// This is similar to the first column of "ip route" output ++func NetworkLinkGetStateUp(iface *net.Interface) (res bool,err error) { ++ //fmt.Println("Needed if idx", iface.Index) ++ ++ s, err := getNetlinkSocket() ++ if err != nil { ++ return false,err ++ } ++ defer s.Close() ++ ++ wb := newNetlinkRequest(syscall.RTM_GETLINK, syscall.NLM_F_DUMP) ++ ++ msg := newIfInfomsg(syscall.AF_UNSPEC) ++ msg.Index = int32(iface.Index) ++ ++ wb.AddData(msg) ++ ++ if err := s.Send(wb); err != nil { ++ return false, err ++ } ++ ++ // retrieve PID ++ pid, err := s.GetPid() ++ if err != nil { ++ return false, err ++ } ++ ++outer: ++// Receive loop ++ for { ++ msgs, err := s.Receive() ++ if err != nil { ++ return false, err ++ } ++ // loop over incoming NL messages ++ for _, m := range msgs { ++ // fmt.Printf("Message %+v\n", m) ++ ++ // check if seq number and receiver PID are correct, abort receive loop on Type == NLMSG_DONE (translated to EOF) ++ if err := s.CheckMessage(m, wb.Seq, pid); err != nil { ++ if err == io.EOF { ++ break outer // abort receive loop if multipart messages reached eof ++ } ++ return false, err ++ } ++ ++ // the result we want to fetch ++ if m.Header.Type != syscall.RTM_NEWLINK { ++ continue ++ } ++ ++ //Cast first part to IfInfoMsg ++ msg := (*IfInfomsg)(unsafe.Pointer(&m.Data[0:syscall.SizeofIfInfomsg][0])) ++ ++ // Ignore message for different interface ++ if msg.Index != int32(iface.Index) { ++ continue ++ } ++ ++ if_up := msg.Flags&syscall.IFF_UP != 0 ++ //fmt.Printf("Message: %+v\n", msg) ++ //fmt.Printf("Flag IFF_UP: %+v\n", if_up) ++ return if_up, nil ++ } ++ } ++ ++ return false, errors.New("Couldn't retreive link state") ++} ++ + // Bring up a particular network interface. + // This is identical to running: ip link set dev $name up + func NetworkLinkUp(iface *net.Interface) error { +@@ -550,6 +658,38 @@ + return s.HandleAck(wb.Seq) + } + ++//Added by MaMe82 ++// Bring down a particular network interface. ++// This is identical to running: ip link set $name down ++func NetworkSetMulticast(iface *net.Interface, enable bool) error { ++ s, err := getNetlinkSocket() ++ if err != nil { ++ return err ++ } ++ defer s.Close() ++ ++ wb := newNetlinkRequest(syscall.RTM_SETLINK, syscall.NLM_F_ACK) ++ ++ msg := newIfInfomsg(syscall.AF_UNSPEC) ++ msg.Index = int32(iface.Index) ++ msg.Flags = syscall.NLM_F_REQUEST ++ msg.Change = DEFAULT_CHANGE ++ msg.IfInfomsg.Change |= syscall.IFF_MULTICAST ++ if enable { ++ msg.IfInfomsg.Flags |= syscall.IFF_MULTICAST ++ } else { ++ msg.IfInfomsg.Flags = uint32(int(msg.IfInfomsg.Flags) & ^syscall.IFF_MULTICAST) ++ } ++ ++ wb.AddData(msg) ++ ++ if err := s.Send(wb); err != nil { ++ return err ++ } ++ ++ return s.HandleAck(wb.Seq) ++} ++ + // Set link Maximum Transmission Unit + // This is identical to running: ip link set dev $name mtu $MTU + // bridge is a bitch here https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=292088 +@@ -907,6 +1047,45 @@ + return s.HandleAck(wb.Seq) + } + ++func networkLinkIpAction4(action, flags int, ifa IfAddr, ifa_broadcast IfAddr) error { ++ s, err := getNetlinkSocket() ++ if err != nil { ++ return err ++ } ++ defer s.Close() ++ ++ family := getIpFamily(ifa.IP) ++ if family != syscall.AF_INET { ++ return errors.New("Address family has to be AF_INET (IPv4)") ++ } ++ ++ wb := newNetlinkRequest(action, flags) ++ ++ msg := newIfAddrmsg(family) ++ msg.Index = uint32(ifa.Iface.Index) ++ prefixLen, _ := ifa.IPNet.Mask.Size() ++ msg.Prefixlen = uint8(prefixLen) ++ wb.AddData(msg) ++ ++ ipData := ifa.IP.To4() ++ ++ localData := newRtAttr(syscall.IFA_LOCAL, ipData) ++ wb.AddData(localData) ++ ++ addrData := newRtAttr(syscall.IFA_ADDRESS, ipData) ++ wb.AddData(addrData) ++ ++ ipBcData := ifa_broadcast.IP.To4() ++ brAddrData := newRtAttr(syscall.IFA_BROADCAST, ipBcData) ++ wb.AddData(brAddrData) ++ ++ if err := s.Send(wb); err != nil { ++ return err ++ } ++ ++ return s.HandleAck(wb.Seq) ++} ++ + // Delete an IP address from an interface. This is identical to: + // ip addr del $ip/$ipNet dev $iface + func NetworkLinkDelIp(iface *net.Interface, ip net.IP, ipNet *net.IPNet) error { +@@ -917,12 +1096,273 @@ + ) + } + ++func IpBroadcast4(n *net.IPNet) (net.IP, error) { ++ ipv4 := n.IP.To4() ++ if ipv4 == nil { ++ return nil, errors.New("No IPv4 net") ++ } ++ maskv4 := n.Mask ++ if len(maskv4) == net.IPv6len { ++ maskv4 = maskv4[12:] ++ } ++ ++ res := net.IPv4(0xff, 0xff, 0xff, 0xff).To4() ++ for i := 0; i < net.IPv4len; i++ { ++ res[i] = (res[i] ^ maskv4[i]) + ipv4[i] ++ } ++ //log.Printf("Calculated broadcast %s", res) ++ return res, nil ++} ++ + // Add an Ip address to an interface. This is identical to: + // ip addr add $ip/$ipNet dev $iface + func NetworkLinkAddIp(iface *net.Interface, ip net.IP, ipNet *net.IPNet) error { ++ family := getIpFamily(ip) ++ ifa := IfAddr{iface, ip, ipNet} ++ if family == syscall.AF_INET6 { ++ return networkLinkIpAction( ++ syscall.RTM_NEWADDR, ++ syscall.NLM_F_CREATE|syscall.NLM_F_EXCL|syscall.NLM_F_ACK, ++ ifa, ++ ) ++ } else { ++ //For IPv4 calculate broadcast ++ ipBc, err := IpBroadcast4(ipNet) ++ //log.Printf("Adding with broadcast ip %v", ipBc) ++ if err != nil { ++ return errors.New(fmt.Sprintf("Errof calculating braodcast IP: %v", err)) ++ } ++ return networkLinkIpAction4( ++ syscall.RTM_NEWADDR, ++ syscall.NLM_F_CREATE|syscall.NLM_F_EXCL|syscall.NLM_F_ACK, ++ ifa, ++ IfAddr{iface, ipBc, ipNet}, ++ ) ++ } ++ ++} ++ ++// Add an Ip address to an interface. This is identical to: ++// ip addr change $ip/$ipNet dev $iface ++func NetworkLinkChangeIp(iface *net.Interface, ip net.IP, ipNet *net.IPNet) error { ++ return networkLinkIpAction( ++ syscall.RTM_NEWADDR, ++ syscall.NLM_F_REPLACE|syscall.NLM_F_ACK, ++ IfAddr{iface, ip, ipNet}, ++ ) ++} ++ ++func linkFlags(rawFlags uint32) net.Flags { ++ var f net.Flags ++ if rawFlags&syscall.IFF_UP != 0 { ++ f |= net.FlagUp ++ } ++ if rawFlags&syscall.IFF_BROADCAST != 0 { ++ f |= net.FlagBroadcast ++ } ++ if rawFlags&syscall.IFF_LOOPBACK != 0 { ++ f |= net.FlagLoopback ++ } ++ if rawFlags&syscall.IFF_POINTOPOINT != 0 { ++ f |= net.FlagPointToPoint ++ } ++ if rawFlags&syscall.IFF_MULTICAST != 0 { ++ f |= net.FlagMulticast ++ } ++ return f ++} ++ ++func newAddr(ifam *syscall.IfAddrmsg, attrs []syscall.NetlinkRouteAttr) net.Addr { ++ var ipPointToPoint bool ++ // Seems like we need to make sure whether the IP interface ++ // stack consists of IP point-to-point numbered or unnumbered ++ // addressing. ++ for _, a := range attrs { ++ if a.Attr.Type == syscall.IFA_LOCAL { ++ ipPointToPoint = true ++ break ++ } ++ } ++ for _, a := range attrs { ++ if ipPointToPoint && a.Attr.Type == syscall.IFA_ADDRESS { ++ continue ++ } ++ switch ifam.Family { ++ case syscall.AF_INET: ++ return &net.IPNet{IP: net.IPv4(a.Value[0], a.Value[1], a.Value[2], a.Value[3]), Mask: net.CIDRMask(int(ifam.Prefixlen), 8*net.IPv4len)} ++ case syscall.AF_INET6: ++ ifa := &net.IPNet{IP: make(net.IP, net.IPv6len), Mask: net.CIDRMask(int(ifam.Prefixlen), 8*net.IPv6len)} ++ copy(ifa.IP, a.Value[:]) ++ return ifa ++ } ++ } ++ return nil ++} ++ ++func newLink(ifim *syscall.IfInfomsg, attrs []syscall.NetlinkRouteAttr) *net.Interface { ++ ifi := &net.Interface{Index: int(ifim.Index), Flags: linkFlags(ifim.Flags)} ++ for _, a := range attrs { ++ switch a.Attr.Type { ++ case syscall.IFLA_ADDRESS: ++ // We never return any /32 or /128 IP address ++ // prefix on any IP tunnel interface as the ++ // hardware address. ++ switch len(a.Value) { ++ case net.IPv4len: ++ switch ifim.Type { ++ case sysARPHardwareIPv4IPv4, sysARPHardwareGREIPv4, sysARPHardwareIPv6IPv4: ++ continue ++ } ++ case net.IPv6len: ++ switch ifim.Type { ++ case sysARPHardwareIPv6IPv6, sysARPHardwareGREIPv6: ++ continue ++ } ++ } ++ var nonzero bool ++ for _, b := range a.Value { ++ if b != 0 { ++ nonzero = true ++ break ++ } ++ } ++ if nonzero { ++ ifi.HardwareAddr = a.Value[:] ++ } ++ case syscall.IFLA_IFNAME: ++ ifi.Name = string(a.Value[:len(a.Value)-1]) ++ case syscall.IFLA_MTU: ++ ifi.MTU = int(*(*uint32)(unsafe.Pointer(&a.Value[:4][0]))) ++ } ++ } ++ return ifi ++} ++ ++func interfaceTable(ifindex int) ([]net.Interface, error) { ++ tab, err := syscall.NetlinkRIB(syscall.RTM_GETLINK, syscall.AF_UNSPEC) ++ if err != nil { ++ return nil, os.NewSyscallError("netlinkrib", err) ++ } ++ msgs, err := syscall.ParseNetlinkMessage(tab) ++ if err != nil { ++ return nil, os.NewSyscallError("parsenetlinkmessage", err) ++ } ++ var ift []net.Interface ++loop: ++ for _, m := range msgs { ++ switch m.Header.Type { ++ case syscall.NLMSG_DONE: ++ break loop ++ case syscall.RTM_NEWLINK: ++ ifim := (*syscall.IfInfomsg)(unsafe.Pointer(&m.Data[0])) ++ if ifindex == 0 || ifindex == int(ifim.Index) { ++ attrs, err := syscall.ParseNetlinkRouteAttr(&m) ++ if err != nil { ++ return nil, os.NewSyscallError("parsenetlinkrouteattr", err) ++ } ++ ift = append(ift, *newLink(ifim, attrs)) ++ if ifindex == int(ifim.Index) { ++ break loop ++ } ++ } ++ } ++ } ++ return ift, nil ++} ++ ++func interfaceByIndex(ift []net.Interface, index int) (*net.Interface, error) { ++ for _, ifi := range ift { ++ if index == ifi.Index { ++ return &ifi, nil ++ } ++ } ++ return nil, errNoSuchInterface ++} ++ ++func addrTable(ift []net.Interface, ifi *net.Interface, msgs []syscall.NetlinkMessage) ([]net.Addr, error) { ++ var ifat []net.Addr ++loop: ++ for _, m := range msgs { ++ switch m.Header.Type { ++ case syscall.NLMSG_DONE: ++ break loop ++ case syscall.RTM_NEWADDR: ++ ifam := (*syscall.IfAddrmsg)(unsafe.Pointer(&m.Data[0])) ++ if len(ift) != 0 || ifi.Index == int(ifam.Index) { ++ if len(ift) != 0 { ++ var err error ++ ifi, err = interfaceByIndex(ift, int(ifam.Index)) ++ ++ if err != nil { ++ return nil, err ++ } ++ } ++ attrs, err := syscall.ParseNetlinkRouteAttr(&m) ++ if err != nil { ++ return nil, os.NewSyscallError("parsenetlinkrouteattr", err) ++ } ++ ifa := newAddr(ifam, attrs) ++ if ifa != nil { ++ ifat = append(ifat, ifa) ++ } ++ } ++ } ++ } ++ return ifat, nil ++} ++ ++func interfaceAddrTable(ifi *net.Interface) ([]net.Addr, error) { ++ tab, err := syscall.NetlinkRIB(syscall.RTM_GETADDR, syscall.AF_UNSPEC) ++ if err != nil { ++ return nil, os.NewSyscallError("netlinkrib", err) ++ } ++ msgs, err := syscall.ParseNetlinkMessage(tab) ++ if err != nil { ++ return nil, os.NewSyscallError("parsenetlinkmessage", err) ++ } ++ var ift []net.Interface ++ if ifi == nil { ++ var err error ++ ift, err = interfaceTable(0) ++ if err != nil { ++ return nil, err ++ } ++ } ++ ifat, err := addrTable(ift, ifi, msgs) ++ if err != nil { ++ return nil, err ++ } ++ return ifat, nil ++} ++ ++func NetworkLinkList(iface *net.Interface) ([]net.Addr, error) { ++ return interfaceAddrTable(iface) ++} ++ ++func NetworkLinkFlush(iface *net.Interface) (error) { ++ at, err := NetworkLinkList(iface) ++ if err != nil { ++ return err ++ } ++ for _, a := range at { ++ ip, ipnet, err := net.ParseCIDR(a.String()) ++ if err != nil { ++ return err ++ } ++ err = NetworkLinkDelIp(iface, ip, ipnet) ++ if err != nil { ++ return err ++ } ++ } ++ return nil ++} ++ ++// Add an Ip address to an interface. This is identical to: ++// ip addr replace $ip/$ipNet dev $iface ++func NetworkLinkReplaceIp(iface *net.Interface, ip net.IP, ipNet *net.IPNet) error { + return networkLinkIpAction( + syscall.RTM_NEWADDR, +- syscall.NLM_F_CREATE|syscall.NLM_F_EXCL|syscall.NLM_F_ACK, ++ syscall.NLM_F_CREATE|syscall.NLM_F_REPLACE|syscall.NLM_F_ACK, + IfAddr{iface, ip, ipNet}, + ) + } +@@ -1108,6 +1548,7 @@ + } + wb.AddData(uint32Attr(syscall.RTA_OIF, uint32(iface.Index))) + ++ //Send the message + if err := s.Send(wb); err != nil { + return err + }