diff options
Diffstat (limited to 'vendor/golang.org/x/sys/unix/syscall_linux.go')
| -rw-r--r-- | vendor/golang.org/x/sys/unix/syscall_linux.go | 87 |
1 files changed, 72 insertions, 15 deletions
diff --git a/vendor/golang.org/x/sys/unix/syscall_linux.go b/vendor/golang.org/x/sys/unix/syscall_linux.go index 84a9e5277..28be1306e 100644 --- a/vendor/golang.org/x/sys/unix/syscall_linux.go +++ b/vendor/golang.org/x/sys/unix/syscall_linux.go @@ -641,6 +641,36 @@ func (sa *SockaddrCAN) sockaddr() (unsafe.Pointer, _Socklen, error) { return unsafe.Pointer(&sa.raw), SizeofSockaddrCAN, nil } +// SockaddrCANJ1939 implements the Sockaddr interface for AF_CAN using J1939 +// protocol (https://en.wikipedia.org/wiki/SAE_J1939). For more information +// on the purposes of the fields, check the official linux kernel documentation +// available here: https://www.kernel.org/doc/Documentation/networking/j1939.rst +type SockaddrCANJ1939 struct { + Ifindex int + Name uint64 + PGN uint32 + Addr uint8 + raw RawSockaddrCAN +} + +func (sa *SockaddrCANJ1939) sockaddr() (unsafe.Pointer, _Socklen, error) { + if sa.Ifindex < 0 || sa.Ifindex > 0x7fffffff { + return nil, 0, EINVAL + } + sa.raw.Family = AF_CAN + sa.raw.Ifindex = int32(sa.Ifindex) + n := (*[8]byte)(unsafe.Pointer(&sa.Name)) + for i := 0; i < 8; i++ { + sa.raw.Addr[i] = n[i] + } + p := (*[4]byte)(unsafe.Pointer(&sa.PGN)) + for i := 0; i < 4; i++ { + sa.raw.Addr[i+8] = p[i] + } + sa.raw.Addr[12] = sa.Addr + return unsafe.Pointer(&sa.raw), SizeofSockaddrCAN, nil +} + // SockaddrALG implements the Sockaddr interface for AF_ALG type sockets. // SockaddrALG enables userspace access to the Linux kernel's cryptography // subsystem. The Type and Name fields specify which type of hash or cipher @@ -952,6 +982,10 @@ func (sa *SockaddrIUCV) sockaddr() (unsafe.Pointer, _Socklen, error) { return unsafe.Pointer(&sa.raw), SizeofSockaddrIUCV, nil } +var socketProtocol = func(fd int) (int, error) { + return GetsockoptInt(fd, SOL_SOCKET, SO_PROTOCOL) +} + func anyToSockaddr(fd int, rsa *RawSockaddrAny) (Sockaddr, error) { switch rsa.Addr.Family { case AF_NETLINK: @@ -1002,7 +1036,7 @@ func anyToSockaddr(fd int, rsa *RawSockaddrAny) (Sockaddr, error) { return sa, nil case AF_INET: - proto, err := GetsockoptInt(fd, SOL_SOCKET, SO_PROTOCOL) + proto, err := socketProtocol(fd) if err != nil { return nil, err } @@ -1028,7 +1062,7 @@ func anyToSockaddr(fd int, rsa *RawSockaddrAny) (Sockaddr, error) { } case AF_INET6: - proto, err := GetsockoptInt(fd, SOL_SOCKET, SO_PROTOCOL) + proto, err := socketProtocol(fd) if err != nil { return nil, err } @@ -1063,7 +1097,7 @@ func anyToSockaddr(fd int, rsa *RawSockaddrAny) (Sockaddr, error) { } return sa, nil case AF_BLUETOOTH: - proto, err := GetsockoptInt(fd, SOL_SOCKET, SO_PROTOCOL) + proto, err := socketProtocol(fd) if err != nil { return nil, err } @@ -1150,20 +1184,43 @@ func anyToSockaddr(fd int, rsa *RawSockaddrAny) (Sockaddr, error) { return sa, nil case AF_CAN: - pp := (*RawSockaddrCAN)(unsafe.Pointer(rsa)) - sa := &SockaddrCAN{ - Ifindex: int(pp.Ifindex), - } - rx := (*[4]byte)(unsafe.Pointer(&sa.RxID)) - for i := 0; i < 4; i++ { - rx[i] = pp.Addr[i] - } - tx := (*[4]byte)(unsafe.Pointer(&sa.TxID)) - for i := 0; i < 4; i++ { - tx[i] = pp.Addr[i+4] + proto, err := socketProtocol(fd) + if err != nil { + return nil, err } - return sa, nil + pp := (*RawSockaddrCAN)(unsafe.Pointer(rsa)) + + switch proto { + case CAN_J1939: + sa := &SockaddrCANJ1939{ + Ifindex: int(pp.Ifindex), + } + name := (*[8]byte)(unsafe.Pointer(&sa.Name)) + for i := 0; i < 8; i++ { + name[i] = pp.Addr[i] + } + pgn := (*[4]byte)(unsafe.Pointer(&sa.PGN)) + for i := 0; i < 4; i++ { + pgn[i] = pp.Addr[i+8] + } + addr := (*[1]byte)(unsafe.Pointer(&sa.Addr)) + addr[0] = pp.Addr[12] + return sa, nil + default: + sa := &SockaddrCAN{ + Ifindex: int(pp.Ifindex), + } + rx := (*[4]byte)(unsafe.Pointer(&sa.RxID)) + for i := 0; i < 4; i++ { + rx[i] = pp.Addr[i] + } + tx := (*[4]byte)(unsafe.Pointer(&sa.TxID)) + for i := 0; i < 4; i++ { + tx[i] = pp.Addr[i+4] + } + return sa, nil + } } return nil, EAFNOSUPPORT } |