David K. Bainbridge | 215e024 | 2017-09-05 23:18:24 -0700 | [diff] [blame] | 1 | // Copyright 2017 The Go Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style |
| 3 | // license that can be found in the LICENSE file. |
| 4 | |
| 5 | package socket |
| 6 | |
| 7 | import ( |
| 8 | "errors" |
| 9 | "runtime" |
| 10 | "syscall" |
| 11 | "unsafe" |
| 12 | ) |
| 13 | |
| 14 | func probeProtocolStack() int { |
| 15 | switch runtime.GOARCH { |
| 16 | case "amd64": |
| 17 | return 4 |
| 18 | default: |
| 19 | var p uintptr |
| 20 | return int(unsafe.Sizeof(p)) |
| 21 | } |
| 22 | } |
| 23 | |
| 24 | //go:cgo_import_dynamic libc___xnet_getsockopt __xnet_getsockopt "libsocket.so" |
| 25 | //go:cgo_import_dynamic libc_setsockopt setsockopt "libsocket.so" |
| 26 | //go:cgo_import_dynamic libc___xnet_recvmsg __xnet_recvmsg "libsocket.so" |
| 27 | //go:cgo_import_dynamic libc___xnet_sendmsg __xnet_sendmsg "libsocket.so" |
| 28 | |
| 29 | //go:linkname procGetsockopt libc___xnet_getsockopt |
| 30 | //go:linkname procSetsockopt libc_setsockopt |
| 31 | //go:linkname procRecvmsg libc___xnet_recvmsg |
| 32 | //go:linkname procSendmsg libc___xnet_sendmsg |
| 33 | |
| 34 | var ( |
| 35 | procGetsockopt uintptr |
| 36 | procSetsockopt uintptr |
| 37 | procRecvmsg uintptr |
| 38 | procSendmsg uintptr |
| 39 | ) |
| 40 | |
| 41 | func sysvicall6(trap, nargs, a1, a2, a3, a4, a5, a6 uintptr) (uintptr, uintptr, syscall.Errno) |
| 42 | func rawSysvicall6(trap, nargs, a1, a2, a3, a4, a5, a6 uintptr) (uintptr, uintptr, syscall.Errno) |
| 43 | |
| 44 | func getsockopt(s uintptr, level, name int, b []byte) (int, error) { |
| 45 | l := uint32(len(b)) |
| 46 | _, _, errno := sysvicall6(uintptr(unsafe.Pointer(&procGetsockopt)), 5, s, uintptr(level), uintptr(name), uintptr(unsafe.Pointer(&b[0])), uintptr(unsafe.Pointer(&l)), 0) |
| 47 | return int(l), errnoErr(errno) |
| 48 | } |
| 49 | |
| 50 | func setsockopt(s uintptr, level, name int, b []byte) error { |
| 51 | _, _, errno := sysvicall6(uintptr(unsafe.Pointer(&procSetsockopt)), 5, s, uintptr(level), uintptr(name), uintptr(unsafe.Pointer(&b[0])), uintptr(len(b)), 0) |
| 52 | return errnoErr(errno) |
| 53 | } |
| 54 | |
| 55 | func recvmsg(s uintptr, h *msghdr, flags int) (int, error) { |
| 56 | n, _, errno := sysvicall6(uintptr(unsafe.Pointer(&procRecvmsg)), 3, s, uintptr(unsafe.Pointer(h)), uintptr(flags), 0, 0, 0) |
| 57 | return int(n), errnoErr(errno) |
| 58 | } |
| 59 | |
| 60 | func sendmsg(s uintptr, h *msghdr, flags int) (int, error) { |
| 61 | n, _, errno := sysvicall6(uintptr(unsafe.Pointer(&procSendmsg)), 3, s, uintptr(unsafe.Pointer(h)), uintptr(flags), 0, 0, 0) |
| 62 | return int(n), errnoErr(errno) |
| 63 | } |
| 64 | |
| 65 | func recvmmsg(s uintptr, hs []mmsghdr, flags int) (int, error) { |
| 66 | return 0, errors.New("not implemented") |
| 67 | } |
| 68 | |
| 69 | func sendmmsg(s uintptr, hs []mmsghdr, flags int) (int, error) { |
| 70 | return 0, errors.New("not implemented") |
| 71 | } |