unix: support Linux NFC Subsystem

This adds the constants and types needed for the Linux NFC Subsystem.
It also adds support for sockaddr_nfc and sockaddr_nfc_llcp to Connect.

The Linux NFC Subsystem is documented in:
https://www.kernel.org/doc/html/latest/networking/nfc.html.

Change-Id: Ic6a79afdba85e9b154ec46f191f27714b4b38a57
Reviewed-on: https://go-review.googlesource.com/c/sys/+/323551
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

unix/linux/types.go

@@ -117,6 +117,7 @@ struct termios2 {
 #include <linux/netfilter.h>
 #include <linux/netlink.h>
 #include <linux/nexthop.h>
+#include <linux/nfc.h>
 #include <linux/openat2.h>
 #include <linux/perf_event.h>
 #include <linux/pps.h>
@@ -224,6 +225,8 @@ union sockaddr_all {
 	struct sockaddr_pppox s7;
 	struct sockaddr_l2tpip s8;
 	struct sockaddr_l2tpip6 s9;
+	struct sockaddr_nfc s10;
+	struct sockaddr_nfc_llcp s11;
 };
 
 struct sockaddr_any {
@@ -280,6 +283,18 @@ struct sockaddr_iucv {
 	signed char siucv_name[8];
 };
 
+// copied from /usr/include/linux/nfc.h modified with explicit unsigned chars.
+struct my_sockaddr_nfc_llcp {
+	sa_family_t sa_family;
+	uint32_t dev_idx;
+	uint32_t target_idx;
+	uint32_t nfc_protocol;
+	uint8_t dsap;
+	uint8_t ssap;
+	uint8_t service_name[NFC_LLCP_MAX_SERVICE_NAME];
+	size_t service_name_len;
+};
+
 #ifdef __ARM_EABI__
 typedef struct user_regs PtraceRegs;
 #elif defined(__aarch64__)
@@ -578,6 +593,10 @@ type RawSockaddrL2TPIP6 C.struct_sockaddr_l2tpip6
 
 type RawSockaddrIUCV C.struct_sockaddr_iucv
 
+type RawSockaddrNFC C.struct_sockaddr_nfc
+
+type RawSockaddrNFCLLCP C.struct_my_sockaddr_nfc_llcp
+
 type RawSockaddr C.struct_sockaddr
 
 type RawSockaddrAny C.struct_sockaddr_any
@@ -633,6 +652,8 @@ const (
 	SizeofSockaddrL2TPIP    = C.sizeof_struct_sockaddr_l2tpip
 	SizeofSockaddrL2TPIP6   = C.sizeof_struct_sockaddr_l2tpip6
 	SizeofSockaddrIUCV      = C.sizeof_struct_sockaddr_iucv
+	SizeofSockaddrNFC       = C.sizeof_struct_sockaddr_nfc
+	SizeofSockaddrNFCLLCP   = C.sizeof_struct_sockaddr_nfc_llcp
 	SizeofLinger            = C.sizeof_struct_linger
 	SizeofIovec             = C.sizeof_struct_iovec
 	SizeofIPMreq            = C.sizeof_struct_ip_mreq
@@ -3704,3 +3725,74 @@ const (
 	MTD_FILE_MODE_OTP_USER    = C.MTD_FILE_MODE_OTP_USER
 	MTD_FILE_MODE_RAW         = C.MTD_FILE_MODE_RAW
 )
+
+// NFC Subsystem enums.
+
+const (
+	NFC_CMD_UNSPEC                    = C.NFC_CMD_UNSPEC
+	NFC_CMD_GET_DEVICE                = C.NFC_CMD_GET_DEVICE
+	NFC_CMD_DEV_UP                    = C.NFC_CMD_DEV_UP
+	NFC_CMD_DEV_DOWN                  = C.NFC_CMD_DEV_DOWN
+	NFC_CMD_DEP_LINK_UP               = C.NFC_CMD_DEP_LINK_UP
+	NFC_CMD_DEP_LINK_DOWN             = C.NFC_CMD_DEP_LINK_DOWN
+	NFC_CMD_START_POLL                = C.NFC_CMD_START_POLL
+	NFC_CMD_STOP_POLL                 = C.NFC_CMD_STOP_POLL
+	NFC_CMD_GET_TARGET                = C.NFC_CMD_GET_TARGET
+	NFC_EVENT_TARGETS_FOUND           = C.NFC_EVENT_TARGETS_FOUND
+	NFC_EVENT_DEVICE_ADDED            = C.NFC_EVENT_DEVICE_ADDED
+	NFC_EVENT_DEVICE_REMOVED          = C.NFC_EVENT_DEVICE_REMOVED
+	NFC_EVENT_TARGET_LOST             = C.NFC_EVENT_TARGET_LOST
+	NFC_EVENT_TM_ACTIVATED            = C.NFC_EVENT_TM_ACTIVATED
+	NFC_EVENT_TM_DEACTIVATED          = C.NFC_EVENT_TM_DEACTIVATED
+	NFC_CMD_LLC_GET_PARAMS            = C.NFC_CMD_LLC_GET_PARAMS
+	NFC_CMD_LLC_SET_PARAMS            = C.NFC_CMD_LLC_SET_PARAMS
+	NFC_CMD_ENABLE_SE                 = C.NFC_CMD_ENABLE_SE
+	NFC_CMD_DISABLE_SE                = C.NFC_CMD_DISABLE_SE
+	NFC_CMD_LLC_SDREQ                 = C.NFC_CMD_LLC_SDREQ
+	NFC_EVENT_LLC_SDRES               = C.NFC_EVENT_LLC_SDRES
+	NFC_CMD_FW_DOWNLOAD               = C.NFC_CMD_FW_DOWNLOAD
+	NFC_EVENT_SE_ADDED                = C.NFC_EVENT_SE_ADDED
+	NFC_EVENT_SE_REMOVED              = C.NFC_EVENT_SE_REMOVED
+	NFC_EVENT_SE_CONNECTIVITY         = C.NFC_EVENT_SE_CONNECTIVITY
+	NFC_EVENT_SE_TRANSACTION          = C.NFC_EVENT_SE_TRANSACTION
+	NFC_CMD_GET_SE                    = C.NFC_CMD_GET_SE
+	NFC_CMD_SE_IO                     = C.NFC_CMD_SE_IO
+	NFC_CMD_ACTIVATE_TARGET           = C.NFC_CMD_ACTIVATE_TARGET
+	NFC_CMD_VENDOR                    = C.NFC_CMD_VENDOR
+	NFC_CMD_DEACTIVATE_TARGET         = C.NFC_CMD_DEACTIVATE_TARGET
+	NFC_ATTR_UNSPEC                   = C.NFC_ATTR_UNSPEC
+	NFC_ATTR_DEVICE_INDEX             = C.NFC_ATTR_DEVICE_INDEX
+	NFC_ATTR_DEVICE_NAME              = C.NFC_ATTR_DEVICE_NAME
+	NFC_ATTR_PROTOCOLS                = C.NFC_ATTR_PROTOCOLS
+	NFC_ATTR_TARGET_INDEX             = C.NFC_ATTR_TARGET_INDEX
+	NFC_ATTR_TARGET_SENS_RES          = C.NFC_ATTR_TARGET_SENS_RES
+	NFC_ATTR_TARGET_SEL_RES           = C.NFC_ATTR_TARGET_SEL_RES
+	NFC_ATTR_TARGET_NFCID1            = C.NFC_ATTR_TARGET_NFCID1
+	NFC_ATTR_TARGET_SENSB_RES         = C.NFC_ATTR_TARGET_SENSB_RES
+	NFC_ATTR_TARGET_SENSF_RES         = C.NFC_ATTR_TARGET_SENSF_RES
+	NFC_ATTR_COMM_MODE                = C.NFC_ATTR_COMM_MODE
+	NFC_ATTR_RF_MODE                  = C.NFC_ATTR_RF_MODE
+	NFC_ATTR_DEVICE_POWERED           = C.NFC_ATTR_DEVICE_POWERED
+	NFC_ATTR_IM_PROTOCOLS             = C.NFC_ATTR_IM_PROTOCOLS
+	NFC_ATTR_TM_PROTOCOLS             = C.NFC_ATTR_TM_PROTOCOLS
+	NFC_ATTR_LLC_PARAM_LTO            = C.NFC_ATTR_LLC_PARAM_LTO
+	NFC_ATTR_LLC_PARAM_RW             = C.NFC_ATTR_LLC_PARAM_RW
+	NFC_ATTR_LLC_PARAM_MIUX           = C.NFC_ATTR_LLC_PARAM_MIUX
+	NFC_ATTR_SE                       = C.NFC_ATTR_SE
+	NFC_ATTR_LLC_SDP                  = C.NFC_ATTR_LLC_SDP
+	NFC_ATTR_FIRMWARE_NAME            = C.NFC_ATTR_FIRMWARE_NAME
+	NFC_ATTR_SE_INDEX                 = C.NFC_ATTR_SE_INDEX
+	NFC_ATTR_SE_TYPE                  = C.NFC_ATTR_SE_TYPE
+	NFC_ATTR_SE_AID                   = C.NFC_ATTR_SE_AID
+	NFC_ATTR_FIRMWARE_DOWNLOAD_STATUS = C.NFC_ATTR_FIRMWARE_DOWNLOAD_STATUS
+	NFC_ATTR_SE_APDU                  = C.NFC_ATTR_SE_APDU
+	NFC_ATTR_TARGET_ISO15693_DSFID    = C.NFC_ATTR_TARGET_ISO15693_DSFID
+	NFC_ATTR_TARGET_ISO15693_UID      = C.NFC_ATTR_TARGET_ISO15693_UID
+	NFC_ATTR_SE_PARAMS                = C.NFC_ATTR_SE_PARAMS
+	NFC_ATTR_VENDOR_ID                = C.NFC_ATTR_VENDOR_ID
+	NFC_ATTR_VENDOR_SUBCMD            = C.NFC_ATTR_VENDOR_SUBCMD
+	NFC_ATTR_VENDOR_DATA              = C.NFC_ATTR_VENDOR_DATA
+	NFC_SDP_ATTR_UNSPEC               = C.NFC_SDP_ATTR_UNSPEC
+	NFC_SDP_ATTR_URI                  = C.NFC_SDP_ATTR_URI
+	NFC_SDP_ATTR_SAP                  = C.NFC_SDP_ATTR_SAP
+)

unix/mkerrors.sh

@@ -239,6 +239,7 @@ struct ltchars {
 #include <linux/netfilter/nfnetlink.h>
 #include <linux/netlink.h>
 #include <linux/net_namespace.h>
+#include <linux/nfc.h>
 #include <linux/nsfs.h>
 #include <linux/perf_event.h>
 #include <linux/pps.h>
@@ -502,6 +503,9 @@ ccflags="$@"
 		$2 ~ /^LO_(KEY|NAME)_SIZE$/ ||
 		$2 ~ /^LOOP_(CLR|CTL|GET|SET)_/ ||
 		$2 ~ /^(AF|SOCK|SO|SOL|IPPROTO|IP|IPV6|TCP|MCAST|EVFILT|NOTE|SHUT|PROT|MAP|MFD|T?PACKET|MSG|SCM|MCL|DT|MADV|PR|LOCAL)_/ ||
+		$2 ~ /^NFC_(GENL|PROTO|COMM|RF|SE|DIRECTION|LLCP|SOCKPROTO)_/ ||
+		$2 ~ /^NFC_.*_(MAX)?SIZE$/ ||
+		$2 ~ /^RAW_PAYLOAD_/ ||
 		$2 ~ /^TP_STATUS_/ ||
 		$2 ~ /^FALLOC_/ ||
 		$2 ~ /^ICMPV?6?_(FILTER|SEC)/ ||

unix/syscall_internal_linux_test.go

@@ -205,6 +205,54 @@ func Test_anyToSockaddr(t *testing.T) {
 			},
 			proto: makeProto(CAN_J1939),
 		},
+		{
+			name: "AF_NFC RAW",
+			rsa: sockaddrNFCToAny(RawSockaddrNFC{
+				Sa_family:    AF_NFC,
+				Dev_idx:      10,
+				Target_idx:   20,
+				Nfc_protocol: 30,
+			}),
+			sa: &SockaddrNFC{
+				DeviceIdx:   10,
+				TargetIdx:   20,
+				NFCProtocol: 30,
+			},
+			proto: makeProto(NFC_SOCKPROTO_RAW),
+		},
+		{
+			name: "AF_NFC LLCP",
+			rsa: sockaddrNFCLLCPToAny(RawSockaddrNFCLLCP{
+				Sa_family:        AF_NFC,
+				Dev_idx:          10,
+				Target_idx:       20,
+				Nfc_protocol:     30,
+				Dsap:             40,
+				Ssap:             50,
+				Service_name:     [63]uint8{'t', 'e', 's', 't'},
+				Service_name_len: 4,
+			}),
+			sa: &SockaddrNFCLLCP{
+				DeviceIdx:      10,
+				TargetIdx:      20,
+				NFCProtocol:    30,
+				DestinationSAP: 40,
+				SourceSAP:      50,
+				ServiceName:    "test",
+			},
+			proto: makeProto(NFC_SOCKPROTO_LLCP),
+		},
+		{
+			name: "AF_NFC unknown",
+			rsa: sockaddrNFCToAny(RawSockaddrNFC{
+				Sa_family:    AF_NFC,
+				Dev_idx:      10,
+				Target_idx:   20,
+				Nfc_protocol: 30,
+			}),
+			err:   EINVAL,
+			proto: makeProto(^0),
+		},
 		{
 			name: "AF_MAX EAFNOSUPPORT",
 			rsa: &RawSockaddrAny{
@@ -631,6 +679,115 @@ func TestSockaddrCAN_sockaddr(t *testing.T) {
 	}
 }
 
+func TestSockaddrNFC_sockaddr(t *testing.T) {
+	tests := []struct {
+		name string
+		sa   *SockaddrNFC
+		raw  *RawSockaddrNFC
+		err  error
+	}{
+		{
+			name: "NFC RAW",
+			sa: &SockaddrNFC{
+				DeviceIdx:   12345678,
+				TargetIdx:   87654321,
+				NFCProtocol: 0xBBBBBBBB,
+			},
+			raw: &RawSockaddrNFC{
+				Sa_family:    AF_NFC,
+				Dev_idx:      12345678,
+				Target_idx:   87654321,
+				Nfc_protocol: 0xBBBBBBBB,
+			},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			out, l, err := tt.sa.sockaddr()
+			if err != tt.err {
+				t.Fatalf("unexpected error: %v, want: %v", err, tt.err)
+			}
+
+			// Must be 0 on error or a fixed size otherwise.
+			if (tt.err != nil && l != 0) || (tt.raw != nil && l != SizeofSockaddrNFC) {
+				t.Fatalf("unexpected Socklen: %d", l)
+			}
+
+			if out != nil {
+				raw := (*RawSockaddrNFC)(out)
+				if !reflect.DeepEqual(raw, tt.raw) {
+					t.Fatalf("unexpected RawSockaddrNFC:\n got: %#v\nwant: %#v", raw, tt.raw)
+				}
+			}
+		})
+	}
+}
+
+func TestSockaddrNFCLLCP_sockaddr(t *testing.T) {
+	tests := []struct {
+		name string
+		sa   *SockaddrNFCLLCP
+		raw  *RawSockaddrNFCLLCP
+		err  error
+	}{
+		{
+			name: "valid",
+			sa: &SockaddrNFCLLCP{
+				DeviceIdx:      12345678,
+				TargetIdx:      87654321,
+				NFCProtocol:    0xBBBBBBBB,
+				DestinationSAP: 55,
+				SourceSAP:      56,
+				ServiceName:    "test service",
+			},
+			raw: &RawSockaddrNFCLLCP{
+				Sa_family:        AF_NFC,
+				Dev_idx:          12345678,
+				Target_idx:       87654321,
+				Nfc_protocol:     0xBBBBBBBB,
+				Dsap:             55,
+				Ssap:             56,
+				Service_name:     [63]uint8{'t', 'e', 's', 't', ' ', 's', 'e', 'r', 'v', 'i', 'c', 'e'},
+				Service_name_len: 12,
+			},
+		},
+		{
+			name: "too long service name",
+			sa: &SockaddrNFCLLCP{
+				DeviceIdx:      12345678,
+				TargetIdx:      87654321,
+				NFCProtocol:    0xBBBBBBBB,
+				DestinationSAP: 55,
+				SourceSAP:      56,
+				ServiceName:    "too long too long too long too long too long too long too long too long too long",
+			},
+			err: EINVAL,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			out, l, err := tt.sa.sockaddr()
+			if err != tt.err {
+				t.Fatalf("unexpected error: %v, want: %v", err, tt.err)
+			}
+
+			// Must be 0 on error or a fixed size otherwise.
+			if (tt.err != nil && l != 0) || (tt.raw != nil && l != SizeofSockaddrNFCLLCP) {
+				t.Fatalf("unexpected Socklen: %d", l)
+			}
+
+			if out != nil {
+				raw := (*RawSockaddrNFCLLCP)(out)
+				if !reflect.DeepEqual(raw, tt.raw) {
+					t.Fatalf("unexpected RawSockaddrNFCLLCP:\n got: %#v\nwant: %#v", raw, tt.raw)
+				}
+			}
+		})
+	}
+}
+
 // These helpers explicitly copy the contents of in into out to produce
 // the correct sockaddr structure, without relying on unsafe casting to
 // a type of a larger size.
@@ -687,3 +844,21 @@ func sockaddrCANToAny(in RawSockaddrCAN) *RawSockaddrAny {
 	)
 	return &out
 }
+
+func sockaddrNFCToAny(in RawSockaddrNFC) *RawSockaddrAny {
+	var out RawSockaddrAny
+	copy(
+		(*(*[SizeofSockaddrAny]byte)(unsafe.Pointer(&out)))[:],
+		(*(*[SizeofSockaddrNFC]byte)(unsafe.Pointer(&in)))[:],
+	)
+	return &out
+}
+
+func sockaddrNFCLLCPToAny(in RawSockaddrNFCLLCP) *RawSockaddrAny {
+	var out RawSockaddrAny
+	copy(
+		(*(*[SizeofSockaddrAny]byte)(unsafe.Pointer(&out)))[:],
+		(*(*[SizeofSockaddrNFCLLCP]byte)(unsafe.Pointer(&in)))[:],
+	)
+	return &out
+}

unix/syscall_linux.go

@@ -904,6 +904,46 @@ func (sa *SockaddrIUCV) sockaddr() (unsafe.Pointer, _Socklen, error) {
 	return unsafe.Pointer(&sa.raw), SizeofSockaddrIUCV, nil
 }
 
+type SockaddrNFC struct {
+	DeviceIdx   uint32
+	TargetIdx   uint32
+	NFCProtocol uint32
+	raw         RawSockaddrNFC
+}
+
+func (sa *SockaddrNFC) sockaddr() (unsafe.Pointer, _Socklen, error) {
+	sa.raw.Sa_family = AF_NFC
+	sa.raw.Dev_idx = sa.DeviceIdx
+	sa.raw.Target_idx = sa.TargetIdx
+	sa.raw.Nfc_protocol = sa.NFCProtocol
+	return unsafe.Pointer(&sa.raw), SizeofSockaddrNFC, nil
+}
+
+type SockaddrNFCLLCP struct {
+	DeviceIdx      uint32
+	TargetIdx      uint32
+	NFCProtocol    uint32
+	DestinationSAP uint8
+	SourceSAP      uint8
+	ServiceName    string
+	raw            RawSockaddrNFCLLCP
+}
+
+func (sa *SockaddrNFCLLCP) sockaddr() (unsafe.Pointer, _Socklen, error) {
+	sa.raw.Sa_family = AF_NFC
+	sa.raw.Dev_idx = sa.DeviceIdx
+	sa.raw.Target_idx = sa.TargetIdx
+	sa.raw.Nfc_protocol = sa.NFCProtocol
+	sa.raw.Dsap = sa.DestinationSAP
+	sa.raw.Ssap = sa.SourceSAP
+	if len(sa.ServiceName) > len(sa.raw.Service_name) {
+		return nil, 0, EINVAL
+	}
+	copy(sa.raw.Service_name[:], sa.ServiceName)
+	sa.raw.SetServiceNameLen(len(sa.ServiceName))
+	return unsafe.Pointer(&sa.raw), SizeofSockaddrNFCLLCP, nil
+}
+
 var socketProtocol = func(fd int) (int, error) {
 	return GetsockoptInt(fd, SOL_SOCKET, SO_PROTOCOL)
 }
@@ -1144,6 +1184,37 @@ func anyToSockaddr(fd int, rsa *RawSockaddrAny) (Sockaddr, error) {
 			}
 			return sa, nil
 		}
+	case AF_NFC:
+		proto, err := socketProtocol(fd)
+		if err != nil {
+			return nil, err
+		}
+		switch proto {
+		case NFC_SOCKPROTO_RAW:
+			pp := (*RawSockaddrNFC)(unsafe.Pointer(rsa))
+			sa := &SockaddrNFC{
+				DeviceIdx:   pp.Dev_idx,
+				TargetIdx:   pp.Target_idx,
+				NFCProtocol: pp.Nfc_protocol,
+			}
+			return sa, nil
+		case NFC_SOCKPROTO_LLCP:
+			pp := (*RawSockaddrNFCLLCP)(unsafe.Pointer(rsa))
+			if uint64(pp.Service_name_len) > uint64(len(pp.Service_name)) {
+				return nil, EINVAL
+			}
+			sa := &SockaddrNFCLLCP{
+				DeviceIdx:      pp.Dev_idx,
+				TargetIdx:      pp.Target_idx,
+				NFCProtocol:    pp.Nfc_protocol,
+				DestinationSAP: pp.Dsap,
+				SourceSAP:      pp.Ssap,
+				ServiceName:    string(pp.Service_name[:pp.Service_name_len]),
+			}
+			return sa, nil
+		default:
+			return nil, EINVAL
+		}
 	}
 	return nil, EAFNOSUPPORT
 }

unix/syscall_linux_386.go

@@ -378,6 +378,10 @@ func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint32(length)
 }
 
+func (rsa *RawSockaddrNFCLLCP) SetServiceNameLen(length int) {
+	rsa.Service_name_len = uint32(length)
+}
+
 //sys	poll(fds *PollFd, nfds int, timeout int) (n int, err error)
 
 func Poll(fds []PollFd, timeout int) (n int, err error) {

unix/syscall_linux_amd64.go

@@ -172,6 +172,10 @@ func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint64(length)
 }
 
+func (rsa *RawSockaddrNFCLLCP) SetServiceNameLen(length int) {
+	rsa.Service_name_len = uint64(length)
+}
+
 //sys	poll(fds *PollFd, nfds int, timeout int) (n int, err error)
 
 func Poll(fds []PollFd, timeout int) (n int, err error) {

unix/syscall_linux_arm.go

@@ -256,6 +256,10 @@ func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint32(length)
 }
 
+func (rsa *RawSockaddrNFCLLCP) SetServiceNameLen(length int) {
+	rsa.Service_name_len = uint32(length)
+}
+
 //sys	poll(fds *PollFd, nfds int, timeout int) (n int, err error)
 
 func Poll(fds []PollFd, timeout int) (n int, err error) {

unix/syscall_linux_arm64.go

@@ -207,6 +207,10 @@ func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint64(length)
 }
 
+func (rsa *RawSockaddrNFCLLCP) SetServiceNameLen(length int) {
+	rsa.Service_name_len = uint64(length)
+}
+
 func InotifyInit() (fd int, err error) {
 	return InotifyInit1(0)
 }

unix/syscall_linux_mips64x.go

@@ -217,6 +217,10 @@ func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint64(length)
 }
 
+func (rsa *RawSockaddrNFCLLCP) SetServiceNameLen(length int) {
+	rsa.Service_name_len = uint64(length)
+}
+
 func InotifyInit() (fd int, err error) {
 	return InotifyInit1(0)
 }

unix/syscall_linux_mipsx.go

@@ -229,6 +229,10 @@ func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint32(length)
 }
 
+func (rsa *RawSockaddrNFCLLCP) SetServiceNameLen(length int) {
+	rsa.Service_name_len = uint32(length)
+}
+
 //sys	poll(fds *PollFd, nfds int, timeout int) (n int, err error)
 
 func Poll(fds []PollFd, timeout int) (n int, err error) {

unix/syscall_linux_ppc.go

@@ -215,6 +215,10 @@ func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint32(length)
 }
 
+func (rsa *RawSockaddrNFCLLCP) SetServiceNameLen(length int) {
+	rsa.Service_name_len = uint32(length)
+}
+
 //sysnb	pipe(p *[2]_C_int) (err error)
 
 func Pipe(p []int) (err error) {

unix/syscall_linux_ppc64x.go

@@ -100,6 +100,10 @@ func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint64(length)
 }
 
+func (rsa *RawSockaddrNFCLLCP) SetServiceNameLen(length int) {
+	rsa.Service_name_len = uint64(length)
+}
+
 //sysnb	pipe(p *[2]_C_int) (err error)
 
 func Pipe(p []int) (err error) {

unix/syscall_linux_riscv64.go

@@ -188,6 +188,10 @@ func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint64(length)
 }
 
+func (rsa *RawSockaddrNFCLLCP) SetServiceNameLen(length int) {
+	rsa.Service_name_len = uint64(length)
+}
+
 func InotifyInit() (fd int, err error) {
 	return InotifyInit1(0)
 }

unix/syscall_linux_s390x.go

@@ -129,6 +129,10 @@ func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint64(length)
 }
 
+func (rsa *RawSockaddrNFCLLCP) SetServiceNameLen(length int) {
+	rsa.Service_name_len = uint64(length)
+}
+
 // Linux on s390x uses the old mmap interface, which requires arguments to be passed in a struct.
 // mmap2 also requires arguments to be passed in a struct; it is currently not exposed in <asm/unistd.h>.
 func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) {

unix/syscall_linux_sparc64.go

@@ -116,6 +116,10 @@ func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint64(length)
 }
 
+func (rsa *RawSockaddrNFCLLCP) SetServiceNameLen(length int) {
+	rsa.Service_name_len = uint64(length)
+}
+
 //sysnb	pipe(p *[2]_C_int) (err error)
 
 func Pipe(p []int) (err error) {

unix/zerrors_linux.go

@@ -1566,6 +1566,59 @@ const (
 	NETLINK_XFRM                                = 0x6
 	NETNSA_MAX                                  = 0x5
 	NETNSA_NSID_NOT_ASSIGNED                    = -0x1
+	NFC_ATR_REQ_GB_MAXSIZE                      = 0x30
+	NFC_ATR_REQ_MAXSIZE                         = 0x40
+	NFC_ATR_RES_GB_MAXSIZE                      = 0x2f
+	NFC_ATR_RES_MAXSIZE                         = 0x40
+	NFC_COMM_ACTIVE                             = 0x0
+	NFC_COMM_PASSIVE                            = 0x1
+	NFC_DEVICE_NAME_MAXSIZE                     = 0x8
+	NFC_DIRECTION_RX                            = 0x0
+	NFC_DIRECTION_TX                            = 0x1
+	NFC_FIRMWARE_NAME_MAXSIZE                   = 0x20
+	NFC_GB_MAXSIZE                              = 0x30
+	NFC_GENL_MCAST_EVENT_NAME                   = "events"
+	NFC_GENL_NAME                               = "nfc"
+	NFC_GENL_VERSION                            = 0x1
+	NFC_HEADER_SIZE                             = 0x1
+	NFC_ISO15693_UID_MAXSIZE                    = 0x8
+	NFC_LLCP_MAX_SERVICE_NAME                   = 0x3f
+	NFC_LLCP_MIUX                               = 0x1
+	NFC_LLCP_REMOTE_LTO                         = 0x3
+	NFC_LLCP_REMOTE_MIU                         = 0x2
+	NFC_LLCP_REMOTE_RW                          = 0x4
+	NFC_LLCP_RW                                 = 0x0
+	NFC_NFCID1_MAXSIZE                          = 0xa
+	NFC_NFCID2_MAXSIZE                          = 0x8
+	NFC_NFCID3_MAXSIZE                          = 0xa
+	NFC_PROTO_FELICA                            = 0x3
+	NFC_PROTO_FELICA_MASK                       = 0x8
+	NFC_PROTO_ISO14443                          = 0x4
+	NFC_PROTO_ISO14443_B                        = 0x6
+	NFC_PROTO_ISO14443_B_MASK                   = 0x40
+	NFC_PROTO_ISO14443_MASK                     = 0x10
+	NFC_PROTO_ISO15693                          = 0x7
+	NFC_PROTO_ISO15693_MASK                     = 0x80
+	NFC_PROTO_JEWEL                             = 0x1
+	NFC_PROTO_JEWEL_MASK                        = 0x2
+	NFC_PROTO_MAX                               = 0x8
+	NFC_PROTO_MIFARE                            = 0x2
+	NFC_PROTO_MIFARE_MASK                       = 0x4
+	NFC_PROTO_NFC_DEP                           = 0x5
+	NFC_PROTO_NFC_DEP_MASK                      = 0x20
+	NFC_RAW_HEADER_SIZE                         = 0x2
+	NFC_RF_INITIATOR                            = 0x0
+	NFC_RF_NONE                                 = 0x2
+	NFC_RF_TARGET                               = 0x1
+	NFC_SENSB_RES_MAXSIZE                       = 0xc
+	NFC_SENSF_RES_MAXSIZE                       = 0x12
+	NFC_SE_DISABLED                             = 0x0
+	NFC_SE_EMBEDDED                             = 0x2
+	NFC_SE_ENABLED                              = 0x1
+	NFC_SE_UICC                                 = 0x1
+	NFC_SOCKPROTO_LLCP                          = 0x1
+	NFC_SOCKPROTO_MAX                           = 0x2
+	NFC_SOCKPROTO_RAW                           = 0x0
 	NFNETLINK_V0                                = 0x0
 	NFNLGRP_ACCT_QUOTA                          = 0x8
 	NFNLGRP_CONNTRACK_DESTROY                   = 0x3
@@ -1991,6 +2044,11 @@ const (
 	QNX4_SUPER_MAGIC                            = 0x2f
 	QNX6_SUPER_MAGIC                            = 0x68191122
 	RAMFS_MAGIC                                 = 0x858458f6
+	RAW_PAYLOAD_DIGITAL                         = 0x3
+	RAW_PAYLOAD_HCI                             = 0x2
+	RAW_PAYLOAD_LLCP                            = 0x0
+	RAW_PAYLOAD_NCI                             = 0x1
+	RAW_PAYLOAD_PROPRIETARY                     = 0x4
 	RDTGROUP_SUPER_MAGIC                        = 0x7655821
 	REISERFS_SUPER_MAGIC                        = 0x52654973
 	RENAME_EXCHANGE                             = 0x2

unix/ztypes_linux.go

@@ -351,6 +351,13 @@ type RawSockaddrIUCV struct {
 	Name    [8]int8
 }
 
+type RawSockaddrNFC struct {
+	Sa_family    uint16
+	Dev_idx      uint32
+	Target_idx   uint32
+	Nfc_protocol uint32
+}
+
 type _Socklen uint32
 
 type Linger struct {
@@ -464,6 +471,7 @@ const (
 	SizeofSockaddrL2TPIP    = 0x10
 	SizeofSockaddrL2TPIP6   = 0x20
 	SizeofSockaddrIUCV      = 0x20
+	SizeofSockaddrNFC       = 0x10
 	SizeofLinger            = 0x8
 	SizeofIPMreq            = 0x8
 	SizeofIPMreqn           = 0xc
@@ -3828,3 +3836,72 @@ const (
 	MTD_FILE_MODE_OTP_USER    = 0x2
 	MTD_FILE_MODE_RAW         = 0x3
 )
+
+const (
+	NFC_CMD_UNSPEC                    = 0x0
+	NFC_CMD_GET_DEVICE                = 0x1
+	NFC_CMD_DEV_UP                    = 0x2
+	NFC_CMD_DEV_DOWN                  = 0x3
+	NFC_CMD_DEP_LINK_UP               = 0x4
+	NFC_CMD_DEP_LINK_DOWN             = 0x5
+	NFC_CMD_START_POLL                = 0x6
+	NFC_CMD_STOP_POLL                 = 0x7
+	NFC_CMD_GET_TARGET                = 0x8
+	NFC_EVENT_TARGETS_FOUND           = 0x9
+	NFC_EVENT_DEVICE_ADDED            = 0xa
+	NFC_EVENT_DEVICE_REMOVED          = 0xb
+	NFC_EVENT_TARGET_LOST             = 0xc
+	NFC_EVENT_TM_ACTIVATED            = 0xd
+	NFC_EVENT_TM_DEACTIVATED          = 0xe
+	NFC_CMD_LLC_GET_PARAMS            = 0xf
+	NFC_CMD_LLC_SET_PARAMS            = 0x10
+	NFC_CMD_ENABLE_SE                 = 0x11
+	NFC_CMD_DISABLE_SE                = 0x12
+	NFC_CMD_LLC_SDREQ                 = 0x13
+	NFC_EVENT_LLC_SDRES               = 0x14
+	NFC_CMD_FW_DOWNLOAD               = 0x15
+	NFC_EVENT_SE_ADDED                = 0x16
+	NFC_EVENT_SE_REMOVED              = 0x17
+	NFC_EVENT_SE_CONNECTIVITY         = 0x18
+	NFC_EVENT_SE_TRANSACTION          = 0x19
+	NFC_CMD_GET_SE                    = 0x1a
+	NFC_CMD_SE_IO                     = 0x1b
+	NFC_CMD_ACTIVATE_TARGET           = 0x1c
+	NFC_CMD_VENDOR                    = 0x1d
+	NFC_CMD_DEACTIVATE_TARGET         = 0x1e
+	NFC_ATTR_UNSPEC                   = 0x0
+	NFC_ATTR_DEVICE_INDEX             = 0x1
+	NFC_ATTR_DEVICE_NAME              = 0x2
+	NFC_ATTR_PROTOCOLS                = 0x3
+	NFC_ATTR_TARGET_INDEX             = 0x4
+	NFC_ATTR_TARGET_SENS_RES          = 0x5
+	NFC_ATTR_TARGET_SEL_RES           = 0x6
+	NFC_ATTR_TARGET_NFCID1            = 0x7
+	NFC_ATTR_TARGET_SENSB_RES         = 0x8
+	NFC_ATTR_TARGET_SENSF_RES         = 0x9
+	NFC_ATTR_COMM_MODE                = 0xa
+	NFC_ATTR_RF_MODE                  = 0xb
+	NFC_ATTR_DEVICE_POWERED           = 0xc
+	NFC_ATTR_IM_PROTOCOLS             = 0xd
+	NFC_ATTR_TM_PROTOCOLS             = 0xe
+	NFC_ATTR_LLC_PARAM_LTO            = 0xf
+	NFC_ATTR_LLC_PARAM_RW             = 0x10
+	NFC_ATTR_LLC_PARAM_MIUX           = 0x11
+	NFC_ATTR_SE                       = 0x12
+	NFC_ATTR_LLC_SDP                  = 0x13
+	NFC_ATTR_FIRMWARE_NAME            = 0x14
+	NFC_ATTR_SE_INDEX                 = 0x15
+	NFC_ATTR_SE_TYPE                  = 0x16
+	NFC_ATTR_SE_AID                   = 0x17
+	NFC_ATTR_FIRMWARE_DOWNLOAD_STATUS = 0x18
+	NFC_ATTR_SE_APDU                  = 0x19
+	NFC_ATTR_TARGET_ISO15693_DSFID    = 0x1a
+	NFC_ATTR_TARGET_ISO15693_UID      = 0x1b
+	NFC_ATTR_SE_PARAMS                = 0x1c
+	NFC_ATTR_VENDOR_ID                = 0x1d
+	NFC_ATTR_VENDOR_SUBCMD            = 0x1e
+	NFC_ATTR_VENDOR_DATA              = 0x1f
+	NFC_SDP_ATTR_UNSPEC               = 0x0
+	NFC_SDP_ATTR_URI                  = 0x1
+	NFC_SDP_ATTR_SAP                  = 0x2
+)

unix/ztypes_linux_386.go

@@ -128,6 +128,17 @@ const (
 	FADV_NOREUSE  = 0x5
 )
 
+type RawSockaddrNFCLLCP struct {
+	Sa_family        uint16
+	Dev_idx          uint32
+	Target_idx       uint32
+	Nfc_protocol     uint32
+	Dsap             uint8
+	Ssap             uint8
+	Service_name     [63]uint8
+	Service_name_len uint32
+}
+
 type RawSockaddr struct {
 	Family uint16
 	Data   [14]int8
@@ -160,6 +171,7 @@ type Cmsghdr struct {
 }
 
 const (
+	SizeofSockaddrNFCLLCP = 0x58
 	SizeofIovec           = 0x8
 	SizeofMsghdr          = 0x1c
 	SizeofCmsghdr         = 0xc

unix/ztypes_linux_amd64.go

@@ -130,6 +130,17 @@ const (
 	FADV_NOREUSE  = 0x5
 )
 
+type RawSockaddrNFCLLCP struct {
+	Sa_family        uint16
+	Dev_idx          uint32
+	Target_idx       uint32
+	Nfc_protocol     uint32
+	Dsap             uint8
+	Ssap             uint8
+	Service_name     [63]uint8
+	Service_name_len uint64
+}
+
 type RawSockaddr struct {
 	Family uint16
 	Data   [14]int8
@@ -163,6 +174,7 @@ type Cmsghdr struct {
 }
 
 const (
+	SizeofSockaddrNFCLLCP = 0x60
 	SizeofIovec           = 0x10
 	SizeofMsghdr          = 0x38
 	SizeofCmsghdr         = 0x10

unix/ztypes_linux_arm.go

@@ -134,6 +134,17 @@ const (
 	FADV_NOREUSE  = 0x5
 )
 
+type RawSockaddrNFCLLCP struct {
+	Sa_family        uint16
+	Dev_idx          uint32
+	Target_idx       uint32
+	Nfc_protocol     uint32
+	Dsap             uint8
+	Ssap             uint8
+	Service_name     [63]uint8
+	Service_name_len uint32
+}
+
 type RawSockaddr struct {
 	Family uint16
 	Data   [14]uint8
@@ -166,6 +177,7 @@ type Cmsghdr struct {
 }
 
 const (
+	SizeofSockaddrNFCLLCP = 0x58
 	SizeofIovec           = 0x8
 	SizeofMsghdr          = 0x1c
 	SizeofCmsghdr         = 0xc

unix/ztypes_linux_arm64.go

@@ -131,6 +131,17 @@ const (
 	FADV_NOREUSE  = 0x5
 )
 
+type RawSockaddrNFCLLCP struct {
+	Sa_family        uint16
+	Dev_idx          uint32
+	Target_idx       uint32
+	Nfc_protocol     uint32
+	Dsap             uint8
+	Ssap             uint8
+	Service_name     [63]uint8
+	Service_name_len uint64
+}
+
 type RawSockaddr struct {
 	Family uint16
 	Data   [14]int8
@@ -164,6 +175,7 @@ type Cmsghdr struct {
 }
 
 const (
+	SizeofSockaddrNFCLLCP = 0x60
 	SizeofIovec           = 0x10
 	SizeofMsghdr          = 0x38
 	SizeofCmsghdr         = 0x10

unix/ztypes_linux_mips.go

@@ -133,6 +133,17 @@ const (
 	FADV_NOREUSE  = 0x5
 )
 
+type RawSockaddrNFCLLCP struct {
+	Sa_family        uint16
+	Dev_idx          uint32
+	Target_idx       uint32
+	Nfc_protocol     uint32
+	Dsap             uint8
+	Ssap             uint8
+	Service_name     [63]uint8
+	Service_name_len uint32
+}
+
 type RawSockaddr struct {
 	Family uint16
 	Data   [14]int8
@@ -165,6 +176,7 @@ type Cmsghdr struct {
 }
 
 const (
+	SizeofSockaddrNFCLLCP = 0x58
 	SizeofIovec           = 0x8
 	SizeofMsghdr          = 0x1c
 	SizeofCmsghdr         = 0xc

unix/ztypes_linux_mips64.go

@@ -131,6 +131,17 @@ const (
 	FADV_NOREUSE  = 0x5
 )
 
+type RawSockaddrNFCLLCP struct {
+	Sa_family        uint16
+	Dev_idx          uint32
+	Target_idx       uint32
+	Nfc_protocol     uint32
+	Dsap             uint8
+	Ssap             uint8
+	Service_name     [63]uint8
+	Service_name_len uint64
+}
+
 type RawSockaddr struct {
 	Family uint16
 	Data   [14]int8
@@ -164,6 +175,7 @@ type Cmsghdr struct {
 }
 
 const (
+	SizeofSockaddrNFCLLCP = 0x60
 	SizeofIovec           = 0x10
 	SizeofMsghdr          = 0x38
 	SizeofCmsghdr         = 0x10

unix/ztypes_linux_mips64le.go

@@ -131,6 +131,17 @@ const (
 	FADV_NOREUSE  = 0x5
 )
 
+type RawSockaddrNFCLLCP struct {
+	Sa_family        uint16
+	Dev_idx          uint32
+	Target_idx       uint32
+	Nfc_protocol     uint32
+	Dsap             uint8
+	Ssap             uint8
+	Service_name     [63]uint8
+	Service_name_len uint64
+}
+
 type RawSockaddr struct {
 	Family uint16
 	Data   [14]int8
@@ -164,6 +175,7 @@ type Cmsghdr struct {
 }
 
 const (
+	SizeofSockaddrNFCLLCP = 0x60
 	SizeofIovec           = 0x10
 	SizeofMsghdr          = 0x38
 	SizeofCmsghdr         = 0x10

unix/ztypes_linux_mipsle.go

@@ -133,6 +133,17 @@ const (
 	FADV_NOREUSE  = 0x5
 )
 
+type RawSockaddrNFCLLCP struct {
+	Sa_family        uint16
+	Dev_idx          uint32
+	Target_idx       uint32
+	Nfc_protocol     uint32
+	Dsap             uint8
+	Ssap             uint8
+	Service_name     [63]uint8
+	Service_name_len uint32
+}
+
 type RawSockaddr struct {
 	Family uint16
 	Data   [14]int8
@@ -165,6 +176,7 @@ type Cmsghdr struct {
 }
 
 const (
+	SizeofSockaddrNFCLLCP = 0x58
 	SizeofIovec           = 0x8
 	SizeofMsghdr          = 0x1c
 	SizeofCmsghdr         = 0xc

unix/ztypes_linux_ppc.go

@@ -134,6 +134,17 @@ const (
 	FADV_NOREUSE  = 0x5
 )
 
+type RawSockaddrNFCLLCP struct {
+	Sa_family        uint16
+	Dev_idx          uint32
+	Target_idx       uint32
+	Nfc_protocol     uint32
+	Dsap             uint8
+	Ssap             uint8
+	Service_name     [63]uint8
+	Service_name_len uint32
+}
+
 type RawSockaddr struct {
 	Family uint16
 	Data   [14]uint8
@@ -166,6 +177,7 @@ type Cmsghdr struct {
 }
 
 const (
+	SizeofSockaddrNFCLLCP = 0x58
 	SizeofIovec           = 0x8
 	SizeofMsghdr          = 0x1c
 	SizeofCmsghdr         = 0xc

unix/ztypes_linux_ppc64.go

@@ -132,6 +132,17 @@ const (
 	FADV_NOREUSE  = 0x5
 )
 
+type RawSockaddrNFCLLCP struct {
+	Sa_family        uint16
+	Dev_idx          uint32
+	Target_idx       uint32
+	Nfc_protocol     uint32
+	Dsap             uint8
+	Ssap             uint8
+	Service_name     [63]uint8
+	Service_name_len uint64
+}
+
 type RawSockaddr struct {
 	Family uint16
 	Data   [14]uint8
@@ -165,6 +176,7 @@ type Cmsghdr struct {
 }
 
 const (
+	SizeofSockaddrNFCLLCP = 0x60
 	SizeofIovec           = 0x10
 	SizeofMsghdr          = 0x38
 	SizeofCmsghdr         = 0x10

unix/ztypes_linux_ppc64le.go

@@ -132,6 +132,17 @@ const (
 	FADV_NOREUSE  = 0x5
 )
 
+type RawSockaddrNFCLLCP struct {
+	Sa_family        uint16
+	Dev_idx          uint32
+	Target_idx       uint32
+	Nfc_protocol     uint32
+	Dsap             uint8
+	Ssap             uint8
+	Service_name     [63]uint8
+	Service_name_len uint64
+}
+
 type RawSockaddr struct {
 	Family uint16
 	Data   [14]uint8
@@ -165,6 +176,7 @@ type Cmsghdr struct {
 }
 
 const (
+	SizeofSockaddrNFCLLCP = 0x60
 	SizeofIovec           = 0x10
 	SizeofMsghdr          = 0x38
 	SizeofCmsghdr         = 0x10

unix/ztypes_linux_riscv64.go

@@ -131,6 +131,17 @@ const (
 	FADV_NOREUSE  = 0x5
 )
 
+type RawSockaddrNFCLLCP struct {
+	Sa_family        uint16
+	Dev_idx          uint32
+	Target_idx       uint32
+	Nfc_protocol     uint32
+	Dsap             uint8
+	Ssap             uint8
+	Service_name     [63]uint8
+	Service_name_len uint64
+}
+
 type RawSockaddr struct {
 	Family uint16
 	Data   [14]uint8
@@ -164,6 +175,7 @@ type Cmsghdr struct {
 }
 
 const (
+	SizeofSockaddrNFCLLCP = 0x60
 	SizeofIovec           = 0x10
 	SizeofMsghdr          = 0x38
 	SizeofCmsghdr         = 0x10

unix/ztypes_linux_s390x.go

@@ -130,6 +130,17 @@ const (
 	FADV_NOREUSE  = 0x7
 )
 
+type RawSockaddrNFCLLCP struct {
+	Sa_family        uint16
+	Dev_idx          uint32
+	Target_idx       uint32
+	Nfc_protocol     uint32
+	Dsap             uint8
+	Ssap             uint8
+	Service_name     [63]uint8
+	Service_name_len uint64
+}
+
 type RawSockaddr struct {
 	Family uint16
 	Data   [14]int8
@@ -163,6 +174,7 @@ type Cmsghdr struct {
 }
 
 const (
+	SizeofSockaddrNFCLLCP = 0x60
 	SizeofIovec           = 0x10
 	SizeofMsghdr          = 0x38
 	SizeofCmsghdr         = 0x10

unix/ztypes_linux_sparc64.go

@@ -134,6 +134,17 @@ const (
 	FADV_NOREUSE  = 0x5
 )
 
+type RawSockaddrNFCLLCP struct {
+	Sa_family        uint16
+	Dev_idx          uint32
+	Target_idx       uint32
+	Nfc_protocol     uint32
+	Dsap             uint8
+	Ssap             uint8
+	Service_name     [63]uint8
+	Service_name_len uint64
+}
+
 type RawSockaddr struct {
 	Family uint16
 	Data   [14]int8
@@ -167,6 +178,7 @@ type Cmsghdr struct {
 }
 
 const (
+	SizeofSockaddrNFCLLCP = 0x60
 	SizeofIovec           = 0x10
 	SizeofMsghdr          = 0x38
 	SizeofCmsghdr         = 0x10