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https://github.com/bettercap/bettercap.git
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134 lines
3.4 KiB
Go
134 lines
3.4 KiB
Go
package can
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import (
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"errors"
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"fmt"
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"net"
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"github.com/bettercap/bettercap/v2/session"
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"github.com/hashicorp/go-bexpr"
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"go.einride.tech/can/pkg/socketcan"
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)
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type CANModule struct {
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session.SessionModule
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transport string
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deviceName string
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dumpName string
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dumpInject bool
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filter string
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filterExpr *bexpr.Evaluator
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dbc *DBC
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obd2 *OBD2
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conn net.Conn
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recv *socketcan.Receiver
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send *socketcan.Transmitter
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}
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func NewCanModule(s *session.Session) *CANModule {
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mod := &CANModule{
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SessionModule: session.NewSessionModule("can", s),
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filter: "",
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dbc: &DBC{},
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obd2: &OBD2{},
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filterExpr: nil,
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transport: "can",
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deviceName: "can0",
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dumpName: "",
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dumpInject: false,
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}
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mod.AddParam(session.NewStringParameter("can.device",
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mod.deviceName,
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"",
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"CAN-bus device."))
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mod.AddParam(session.NewStringParameter("can.dump",
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mod.dumpName,
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"",
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"Load CAN traffic from this candump log file."))
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mod.AddParam(session.NewBoolParameter("can.dump.inject",
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fmt.Sprintf("%v", mod.dumpInject),
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"Write CAN traffic read form the candump log file to the selected can.device."))
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mod.AddParam(session.NewStringParameter("can.transport",
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mod.transport,
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"",
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"Network type, can be 'can' for SocketCAN or 'udp'."))
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mod.AddParam(session.NewStringParameter("can.filter",
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"",
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"",
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"Optional boolean expression to select frames to report."))
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mod.AddParam(session.NewBoolParameter("can.parse.obd2",
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"false",
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"Enable built in OBD2 PID parsing."))
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mod.AddHandler(session.NewModuleHandler("can.recon on", "",
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"Start CAN-bus discovery.",
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func(args []string) error {
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return mod.Start()
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}))
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mod.AddHandler(session.NewModuleHandler("can.recon off", "",
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"Stop CAN-bus discovery.",
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func(args []string) error {
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return mod.Stop()
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}))
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mod.AddHandler(session.NewModuleHandler("can.clear", "",
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"Clear everything collected by the discovery module.",
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func(args []string) error {
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mod.Session.CAN.Clear()
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return nil
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}))
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mod.AddHandler(session.NewModuleHandler("can.show", "",
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"Show a list of detected CAN devices.",
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func(args []string) error {
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return mod.Show()
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}))
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mod.AddHandler(session.NewModuleHandler("can.dbc.load NAME", "can.dbc.load (.+)",
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"Load a DBC file from the list of available ones or from disk.",
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func(args []string) error {
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return mod.dbcLoad(args[0])
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}))
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mod.AddHandler(session.NewModuleHandler("can.inject FRAME_EXPRESSION", `(?i)^can\.inject\s+([a-fA-F0-9#R]+)$`,
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"Parse FRAME_EXPRESSION as 'id#data' and inject it as a CAN frame.",
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func(args []string) error {
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if !mod.Running() {
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return errors.New("can module not running")
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}
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return mod.Inject(args[0])
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}))
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mod.AddHandler(session.NewModuleHandler("can.fuzz ID_OR_NODE_NAME OPTIONAL_SIZE", `(?i)^can\.fuzz\s+([^\s]+)\s*(\d*)$`,
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"If an hexadecimal frame ID is specified, create a randomized version of it and inject it. If a node name is specified, a random message for the given node will be instead used.",
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func(args []string) error {
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if !mod.Running() {
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return errors.New("can module not running")
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}
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return mod.Fuzz(args[0], args[1])
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}))
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return mod
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}
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func (mod *CANModule) Name() string {
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return "can"
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}
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func (mod *CANModule) Description() string {
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return "A scanner and frames injection module for CAN-bus."
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}
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func (mod *CANModule) Author() string {
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return "Simone Margaritelli <evilsocket@gmail.com>"
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}
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