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 | 310 |
1 files changed, 270 insertions, 40 deletions
diff --git a/vendor/golang.org/x/sys/unix/syscall_linux.go b/vendor/golang.org/x/sys/unix/syscall_linux.go index 9908030cb..776040233 100644 --- a/vendor/golang.org/x/sys/unix/syscall_linux.go +++ b/vendor/golang.org/x/sys/unix/syscall_linux.go @@ -12,6 +12,8 @@ package unix import ( + "encoding/binary" + "net" "syscall" "unsafe" ) @@ -55,17 +57,26 @@ func Fchmodat(dirfd int, path string, mode uint32, flags int) (err error) { // ioctl itself should not be exposed directly, but additional get/set // functions for specific types are permissible. +// IoctlSetPointerInt performs an ioctl operation which sets an +// integer value on fd, using the specified request number. The ioctl +// argument is called with a pointer to the integer value, rather than +// passing the integer value directly. +func IoctlSetPointerInt(fd int, req uint, value int) error { + v := int32(value) + return ioctl(fd, req, uintptr(unsafe.Pointer(&v))) +} + // IoctlSetInt performs an ioctl operation which sets an integer value // on fd, using the specified request number. func IoctlSetInt(fd int, req uint, value int) error { return ioctl(fd, req, uintptr(value)) } -func IoctlSetWinsize(fd int, req uint, value *Winsize) error { +func ioctlSetWinsize(fd int, req uint, value *Winsize) error { return ioctl(fd, req, uintptr(unsafe.Pointer(value))) } -func IoctlSetTermios(fd int, req uint, value *Termios) error { +func ioctlSetTermios(fd int, req uint, value *Termios) error { return ioctl(fd, req, uintptr(unsafe.Pointer(value))) } @@ -489,6 +500,47 @@ func (sa *SockaddrL2) sockaddr() (unsafe.Pointer, _Socklen, error) { return unsafe.Pointer(&sa.raw), SizeofSockaddrL2, nil } +// SockaddrRFCOMM implements the Sockaddr interface for AF_BLUETOOTH type sockets +// using the RFCOMM protocol. +// +// Server example: +// +// fd, _ := Socket(AF_BLUETOOTH, SOCK_STREAM, BTPROTO_RFCOMM) +// _ = unix.Bind(fd, &unix.SockaddrRFCOMM{ +// Channel: 1, +// Addr: [6]uint8{0, 0, 0, 0, 0, 0}, // BDADDR_ANY or 00:00:00:00:00:00 +// }) +// _ = Listen(fd, 1) +// nfd, sa, _ := Accept(fd) +// fmt.Printf("conn addr=%v fd=%d", sa.(*unix.SockaddrRFCOMM).Addr, nfd) +// Read(nfd, buf) +// +// Client example: +// +// fd, _ := Socket(AF_BLUETOOTH, SOCK_STREAM, BTPROTO_RFCOMM) +// _ = Connect(fd, &SockaddrRFCOMM{ +// Channel: 1, +// Addr: [6]byte{0x11, 0x22, 0x33, 0xaa, 0xbb, 0xcc}, // CC:BB:AA:33:22:11 +// }) +// Write(fd, []byte(`hello`)) +type SockaddrRFCOMM struct { + // Addr represents a bluetooth address, byte ordering is little-endian. + Addr [6]uint8 + + // Channel is a designated bluetooth channel, only 1-30 are available for use. + // Since Linux 2.6.7 and further zero value is the first available channel. + Channel uint8 + + raw RawSockaddrRFCOMM +} + +func (sa *SockaddrRFCOMM) sockaddr() (unsafe.Pointer, _Socklen, error) { + sa.raw.Family = AF_BLUETOOTH + sa.raw.Channel = sa.Channel + sa.raw.Bdaddr = sa.Addr + return unsafe.Pointer(&sa.raw), SizeofSockaddrRFCOMM, nil +} + // SockaddrCAN implements the Sockaddr interface for AF_CAN type sockets. // The RxID and TxID fields are used for transport protocol addressing in // (CAN_TP16, CAN_TP20, CAN_MCNET, and CAN_ISOTP), they can be left with @@ -651,7 +703,70 @@ func (sa *SockaddrVM) sockaddr() (unsafe.Pointer, _Socklen, error) { return unsafe.Pointer(&sa.raw), SizeofSockaddrVM, nil } -func anyToSockaddr(rsa *RawSockaddrAny) (Sockaddr, error) { +type SockaddrXDP struct { + Flags uint16 + Ifindex uint32 + QueueID uint32 + SharedUmemFD uint32 + raw RawSockaddrXDP +} + +func (sa *SockaddrXDP) sockaddr() (unsafe.Pointer, _Socklen, error) { + sa.raw.Family = AF_XDP + sa.raw.Flags = sa.Flags + sa.raw.Ifindex = sa.Ifindex + sa.raw.Queue_id = sa.QueueID + sa.raw.Shared_umem_fd = sa.SharedUmemFD + + return unsafe.Pointer(&sa.raw), SizeofSockaddrXDP, nil +} + +// This constant mirrors the #define of PX_PROTO_OE in +// linux/if_pppox.h. We're defining this by hand here instead of +// autogenerating through mkerrors.sh because including +// linux/if_pppox.h causes some declaration conflicts with other +// includes (linux/if_pppox.h includes linux/in.h, which conflicts +// with netinet/in.h). Given that we only need a single zero constant +// out of that file, it's cleaner to just define it by hand here. +const px_proto_oe = 0 + +type SockaddrPPPoE struct { + SID uint16 + Remote net.HardwareAddr + Dev string + raw RawSockaddrPPPoX +} + +func (sa *SockaddrPPPoE) sockaddr() (unsafe.Pointer, _Socklen, error) { + if len(sa.Remote) != 6 { + return nil, 0, EINVAL + } + if len(sa.Dev) > IFNAMSIZ-1 { + return nil, 0, EINVAL + } + + *(*uint16)(unsafe.Pointer(&sa.raw[0])) = AF_PPPOX + // This next field is in host-endian byte order. We can't use the + // same unsafe pointer cast as above, because this value is not + // 32-bit aligned and some architectures don't allow unaligned + // access. + // + // However, the value of px_proto_oe is 0, so we can use + // encoding/binary helpers to write the bytes without worrying + // about the ordering. + binary.BigEndian.PutUint32(sa.raw[2:6], px_proto_oe) + // This field is deliberately big-endian, unlike the previous + // one. The kernel expects SID to be in network byte order. + binary.BigEndian.PutUint16(sa.raw[6:8], sa.SID) + copy(sa.raw[8:14], sa.Remote) + for i := 14; i < 14+IFNAMSIZ; i++ { + sa.raw[i] = 0 + } + copy(sa.raw[14:], sa.Dev) + return unsafe.Pointer(&sa.raw), SizeofSockaddrPPPoX, nil +} + +func anyToSockaddr(fd int, rsa *RawSockaddrAny) (Sockaddr, error) { switch rsa.Addr.Family { case AF_NETLINK: pp := (*RawSockaddrNetlink)(unsafe.Pointer(rsa)) @@ -728,6 +843,55 @@ func anyToSockaddr(rsa *RawSockaddrAny) (Sockaddr, error) { Port: pp.Port, } return sa, nil + case AF_BLUETOOTH: + proto, err := GetsockoptInt(fd, SOL_SOCKET, SO_PROTOCOL) + if err != nil { + return nil, err + } + // only BTPROTO_L2CAP and BTPROTO_RFCOMM can accept connections + switch proto { + case BTPROTO_L2CAP: + pp := (*RawSockaddrL2)(unsafe.Pointer(rsa)) + sa := &SockaddrL2{ + PSM: pp.Psm, + CID: pp.Cid, + Addr: pp.Bdaddr, + AddrType: pp.Bdaddr_type, + } + return sa, nil + case BTPROTO_RFCOMM: + pp := (*RawSockaddrRFCOMM)(unsafe.Pointer(rsa)) + sa := &SockaddrRFCOMM{ + Channel: pp.Channel, + Addr: pp.Bdaddr, + } + return sa, nil + } + case AF_XDP: + pp := (*RawSockaddrXDP)(unsafe.Pointer(rsa)) + sa := &SockaddrXDP{ + Flags: pp.Flags, + Ifindex: pp.Ifindex, + QueueID: pp.Queue_id, + SharedUmemFD: pp.Shared_umem_fd, + } + return sa, nil + case AF_PPPOX: + pp := (*RawSockaddrPPPoX)(unsafe.Pointer(rsa)) + if binary.BigEndian.Uint32(pp[2:6]) != px_proto_oe { + return nil, EINVAL + } + sa := &SockaddrPPPoE{ + SID: binary.BigEndian.Uint16(pp[6:8]), + Remote: net.HardwareAddr(pp[8:14]), + } + for i := 14; i < 14+IFNAMSIZ; i++ { + if pp[i] == 0 { + sa.Dev = string(pp[14:i]) + break + } + } + return sa, nil } return nil, EAFNOSUPPORT } @@ -739,7 +903,7 @@ func Accept(fd int) (nfd int, sa Sockaddr, err error) { if err != nil { return } - sa, err = anyToSockaddr(&rsa) + sa, err = anyToSockaddr(fd, &rsa) if err != nil { Close(nfd) nfd = 0 @@ -757,7 +921,7 @@ func Accept4(fd int, flags int) (nfd int, sa Sockaddr, err error) { if len > SizeofSockaddrAny { panic("RawSockaddrAny too small") } - sa, err = anyToSockaddr(&rsa) + sa, err = anyToSockaddr(fd, &rsa) if err != nil { Close(nfd) nfd = 0 @@ -771,7 +935,7 @@ func Getsockname(fd int) (sa Sockaddr, err error) { if err = getsockname(fd, &rsa, &len); err != nil { return } - return anyToSockaddr(&rsa) + return anyToSockaddr(fd, &rsa) } func GetsockoptIPMreqn(fd, level, opt int) (*IPMreqn, error) { @@ -960,7 +1124,7 @@ func Recvmsg(fd int, p, oob []byte, flags int) (n, oobn int, recvflags int, from recvflags = int(msg.Flags) // source address is only specified if the socket is unconnected if rsa.Addr.Family != AF_UNSPEC { - from, err = anyToSockaddr(&rsa) + from, err = anyToSockaddr(fd, &rsa) } return } @@ -1030,7 +1194,7 @@ func ptracePeek(req int, pid int, addr uintptr, out []byte) (count int, err erro // The ptrace syscall differs from glibc's ptrace. // Peeks returns the word in *data, not as the return value. - var buf [sizeofPtr]byte + var buf [SizeofPtr]byte // Leading edge. PEEKTEXT/PEEKDATA don't require aligned // access (PEEKUSER warns that it might), but if we don't @@ -1038,12 +1202,12 @@ func ptracePeek(req int, pid int, addr uintptr, out []byte) (count int, err erro // boundary and not get the bytes leading up to the page // boundary. n := 0 - if addr%sizeofPtr != 0 { - err = ptrace(req, pid, addr-addr%sizeofPtr, uintptr(unsafe.Pointer(&buf[0]))) + if addr%SizeofPtr != 0 { + err = ptrace(req, pid, addr-addr%SizeofPtr, uintptr(unsafe.Pointer(&buf[0]))) if err != nil { return 0, err } - n += copy(out, buf[addr%sizeofPtr:]) + n += copy(out, buf[addr%SizeofPtr:]) out = out[n:] } @@ -1081,15 +1245,15 @@ func ptracePoke(pokeReq int, peekReq int, pid int, addr uintptr, data []byte) (c // Leading edge. n := 0 - if addr%sizeofPtr != 0 { - var buf [sizeofPtr]byte - err = ptrace(peekReq, pid, addr-addr%sizeofPtr, uintptr(unsafe.Pointer(&buf[0]))) + if addr%SizeofPtr != 0 { + var buf [SizeofPtr]byte + err = ptrace(peekReq, pid, addr-addr%SizeofPtr, uintptr(unsafe.Pointer(&buf[0]))) if err != nil { return 0, err } - n += copy(buf[addr%sizeofPtr:], data) + n += copy(buf[addr%SizeofPtr:], data) word := *((*uintptr)(unsafe.Pointer(&buf[0]))) - err = ptrace(pokeReq, pid, addr-addr%sizeofPtr, word) + err = ptrace(pokeReq, pid, addr-addr%SizeofPtr, word) if err != nil { return 0, err } @@ -1097,19 +1261,19 @@ func ptracePoke(pokeReq int, peekReq int, pid int, addr uintptr, data []byte) (c } // Interior. - for len(data) > sizeofPtr { + for len(data) > SizeofPtr { word := *((*uintptr)(unsafe.Pointer(&data[0]))) err = ptrace(pokeReq, pid, addr+uintptr(n), word) if err != nil { return n, err } - n += sizeofPtr - data = data[sizeofPtr:] + n += SizeofPtr + data = data[SizeofPtr:] } // Trailing edge. if len(data) > 0 { - var buf [sizeofPtr]byte + var buf [SizeofPtr]byte err = ptrace(peekReq, pid, addr+uintptr(n), uintptr(unsafe.Pointer(&buf[0]))) if err != nil { return n, err @@ -1196,6 +1360,13 @@ func Mount(source string, target string, fstype string, flags uintptr, data stri return mount(source, target, fstype, flags, datap) } +func Sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) { + if raceenabled { + raceReleaseMerge(unsafe.Pointer(&ioSync)) + } + return sendfile(outfd, infd, offset, count) +} + // Sendto // Recvfrom // Socketpair @@ -1208,9 +1379,11 @@ func Mount(source string, target string, fstype string, flags uintptr, data stri //sys Adjtimex(buf *Timex) (state int, err error) //sys Chdir(path string) (err error) //sys Chroot(path string) (err error) +//sys ClockGetres(clockid int32, res *Timespec) (err error) //sys ClockGettime(clockid int32, time *Timespec) (err error) //sys Close(fd int) (err error) //sys CopyFileRange(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error) +//sys DeleteModule(name string, flags int) (err error) //sys Dup(oldfd int) (fd int, err error) //sys Dup3(oldfd int, newfd int, flags int) (err error) //sysnb EpollCreate1(flag int) (fd int, err error) @@ -1223,7 +1396,12 @@ func Mount(source string, target string, fstype string, flags uintptr, data stri //sys Fchownat(dirfd int, path string, uid int, gid int, flags int) (err error) //sys fcntl(fd int, cmd int, arg int) (val int, err error) //sys Fdatasync(fd int) (err error) +//sys Fgetxattr(fd int, attr string, dest []byte) (sz int, err error) +//sys FinitModule(fd int, params string, flags int) (err error) +//sys Flistxattr(fd int, dest []byte) (sz int, err error) //sys Flock(fd int, how int) (err error) +//sys Fremovexattr(fd int, attr string) (err error) +//sys Fsetxattr(fd int, attr string, dest []byte, flags int) (err error) //sys Fsync(fd int) (err error) //sys Getdents(fd int, buf []byte) (n int, err error) = SYS_GETDENTS64 //sysnb Getpgid(pid int) (pgid int, err error) @@ -1241,6 +1419,7 @@ func Getpgrp() (pid int) { //sysnb Getsid(pid int) (sid int, err error) //sysnb Gettid() (tid int) //sys Getxattr(path string, attr string, dest []byte) (sz int, err error) +//sys InitModule(moduleImage []byte, params string) (err error) //sys InotifyAddWatch(fd int, pathname string, mask uint32) (watchdesc int, err error) //sysnb InotifyInit1(flags int) (fd int, err error) //sysnb InotifyRmWatch(fd int, watchdesc uint32) (success int, err error) @@ -1251,6 +1430,7 @@ func Getpgrp() (pid int) { //sys Llistxattr(path string, dest []byte) (sz int, err error) //sys Lremovexattr(path string, attr string) (err error) //sys Lsetxattr(path string, attr string, data []byte, flags int) (err error) +//sys MemfdCreate(name string, flags int) (fd int, err error) //sys Mkdirat(dirfd int, path string, mode uint32) (err error) //sys Mknodat(dirfd int, path string, mode uint32, dev int) (err error) //sys Nanosleep(time *Timespec, leftover *Timespec) (err error) @@ -1262,6 +1442,7 @@ func Getpgrp() (pid int) { //sys read(fd int, p []byte) (n int, err error) //sys Removexattr(path string, attr string) (err error) //sys Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error) +//sys Renameat2(olddirfd int, oldpath string, newdirfd int, newpath string, flags uint) (err error) //sys RequestKey(keyType string, description string, callback string, destRingid int) (id int, err error) //sys Setdomainname(p []byte) (err error) //sys Sethostname(p []byte) (err error) @@ -1329,15 +1510,12 @@ func Munmap(b []byte) (err error) { // Vmsplice splices user pages from a slice of Iovecs into a pipe specified by fd, // using the specified flags. func Vmsplice(fd int, iovs []Iovec, flags int) (int, error) { - n, _, errno := Syscall6( - SYS_VMSPLICE, - uintptr(fd), - uintptr(unsafe.Pointer(&iovs[0])), - uintptr(len(iovs)), - uintptr(flags), - 0, - 0, - ) + var p unsafe.Pointer + if len(iovs) > 0 { + p = unsafe.Pointer(&iovs[0]) + } + + n, _, errno := Syscall6(SYS_VMSPLICE, uintptr(fd), uintptr(p), uintptr(len(iovs)), uintptr(flags), 0, 0) if errno != 0 { return 0, syscall.Errno(errno) } @@ -1350,10 +1528,70 @@ func Vmsplice(fd int, iovs []Iovec, flags int) (int, error) { func Faccessat(dirfd int, path string, mode uint32, flags int) (err error) { if flags & ^(AT_SYMLINK_NOFOLLOW|AT_EACCESS) != 0 { return EINVAL - } else if flags&(AT_SYMLINK_NOFOLLOW|AT_EACCESS) != 0 { - return EOPNOTSUPP } - return faccessat(dirfd, path, mode) + + // The Linux kernel faccessat system call does not take any flags. + // The glibc faccessat implements the flags itself; see + // https://sourceware.org/git/?p=glibc.git;a=blob;f=sysdeps/unix/sysv/linux/faccessat.c;hb=HEAD + // Because people naturally expect syscall.Faccessat to act + // like C faccessat, we do the same. + + if flags == 0 { + return faccessat(dirfd, path, mode) + } + + var st Stat_t + if err := Fstatat(dirfd, path, &st, flags&AT_SYMLINK_NOFOLLOW); err != nil { + return err + } + + mode &= 7 + if mode == 0 { + return nil + } + + var uid int + if flags&AT_EACCESS != 0 { + uid = Geteuid() + } else { + uid = Getuid() + } + + if uid == 0 { + if mode&1 == 0 { + // Root can read and write any file. + return nil + } + if st.Mode&0111 != 0 { + // Root can execute any file that anybody can execute. + return nil + } + return EACCES + } + + var fmode uint32 + if uint32(uid) == st.Uid { + fmode = (st.Mode >> 6) & 7 + } else { + var gid int + if flags&AT_EACCESS != 0 { + gid = Getegid() + } else { + gid = Getgid() + } + + if uint32(gid) == st.Gid { + fmode = (st.Mode >> 3) & 7 + } else { + fmode = st.Mode & 7 + } + } + + if fmode&mode == mode { + return nil + } + + return EACCES } /* @@ -1365,21 +1603,14 @@ func Faccessat(dirfd int, path string, mode uint32, flags int) (err error) { // Brk // Capget // Capset -// ClockGetres // ClockNanosleep // ClockSettime // Clone -// CreateModule -// DeleteModule // EpollCtlOld // EpollPwait // EpollWaitOld // Execve -// Fgetxattr -// Flistxattr // Fork -// Fremovexattr -// Fsetxattr // Futex // GetKernelSyms // GetMempolicy @@ -1418,7 +1649,6 @@ func Faccessat(dirfd int, path string, mode uint32, flags int) (err error) { // Pselect6 // Ptrace // Putpmsg -// QueryModule // Quotactl // Readahead // Readv |