Fix binding to can interface on linux

Author: brutella

Makefile

@@ -3,10 +3,11 @@ GOBUILD=$(GOCMD) build
 GOCLEAN=$(GOCMD) clean
 GOTEST=$(GOCMD) test
 GOGET=$(GOCMD) get
+
 BINARY_NAME=candump
+VERSION=$(shell git describe --exact-match --tags 2>/dev/null)
 BUILD_DIR=build
 BUILD_SRC=cmd/candump.go
-PACKAGE_RPI=$(BINARY_NAME)_linux_armhf
 
 all: test build
 build:
@@ -20,7 +21,7 @@ clean:
 	rm -rf $(BINARY_NAME)
 
 package-rpi: build-rpi
-	tar -cvzf $(PACKAGE_RPI).tar.gz -C $(BUILD_DIR) $(BINARY_NAME)
+	tar -cvzf $(BINARY_NAME)-$(VERSION)_linux_armhf.tar.gz -C $(BUILD_DIR) $(BINARY_NAME)
 
 build-rpi:
 	GOOS=linux GOARCH=arm GOARM=6 $(GOBUILD) -o $(BUILD_DIR)/$(BINARY_NAME) -i $(BUILD_SRC)

readwritecloser.go

@@ -1,11 +1,7 @@
 package can
 
 import (
-	"fmt"
 	"io"
-	"net"
-	"os"
-	"syscall"
 )
 
 // The Reader interface extends the `io.Reader` interface by method
@@ -31,39 +27,10 @@ type ReadWriteCloser interface {
 	io.Closer
 }
 
-// Socket protocols
-const (
-	Raw   uint8 = 1 // CAN_RAW
-	Bcm   uint8 = 2 // CAN_BCM
-	TP16  uint8 = 3
-	TP20  uint8 = 4
-	MCNet uint8 = 5
-	ISOTp uint8 = 6
-)
-
 type readWriteCloser struct {
 	rwc io.ReadWriteCloser
 }
 
-// NewReadWriteCloserForInterface returns a ReadWriteCloser for a network interface.
-func NewReadWriteCloserForInterface(i *net.Interface) (ReadWriteCloser, error) {
-	proto := Raw
-	s, err := syscall.Socket(AF_CAN, syscall.SOCK_RAW, int(proto) /* 0? */)
-	if err != nil {
-		return nil, err
-	}
-
-	addr := NewSockaddr(uint16(proto) /* can.AF_CAN? */, i.Index /* 0  for all interfaces? */)
-
-	if err := syscall.Bind(s, addr); err != nil {
-		return nil, err
-	}
-
-	f := os.NewFile(uintptr(s), fmt.Sprintf("fd %d", s))
-
-	return &readWriteCloser{f}, nil
-}
-
 // NewReadWriteCloser returns a ReadWriteCloser for an `io.ReadWriteCloser`.
 func NewReadWriteCloser(rwc io.ReadWriteCloser) ReadWriteCloser {
 	return &readWriteCloser{rwc}