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 | // +build go1.9 |
| 6 | // +build linux |
| 7 | |
| 8 | package socket |
| 9 | |
| 10 | import ( |
| 11 | "net" |
| 12 | "os" |
| 13 | "syscall" |
| 14 | ) |
| 15 | |
| 16 | func (c *Conn) recvMsgs(ms []Message, flags int) (int, error) { |
| 17 | hs := make(mmsghdrs, len(ms)) |
| 18 | var parseFn func([]byte, string) (net.Addr, error) |
| 19 | if c.network != "tcp" { |
| 20 | parseFn = parseInetAddr |
| 21 | } |
| 22 | if err := hs.pack(ms, parseFn, nil); err != nil { |
| 23 | return 0, err |
| 24 | } |
| 25 | var operr error |
| 26 | var n int |
| 27 | fn := func(s uintptr) bool { |
| 28 | n, operr = recvmmsg(s, hs, flags) |
| 29 | if operr == syscall.EAGAIN { |
| 30 | return false |
| 31 | } |
| 32 | return true |
| 33 | } |
| 34 | if err := c.c.Read(fn); err != nil { |
| 35 | return n, err |
| 36 | } |
| 37 | if operr != nil { |
| 38 | return n, os.NewSyscallError("recvmmsg", operr) |
| 39 | } |
| 40 | if err := hs[:n].unpack(ms[:n], parseFn, c.network); err != nil { |
| 41 | return n, err |
| 42 | } |
| 43 | return n, nil |
| 44 | } |
| 45 | |
| 46 | func (c *Conn) sendMsgs(ms []Message, flags int) (int, error) { |
| 47 | hs := make(mmsghdrs, len(ms)) |
| 48 | var marshalFn func(net.Addr) []byte |
| 49 | if c.network != "tcp" { |
| 50 | marshalFn = marshalInetAddr |
| 51 | } |
| 52 | if err := hs.pack(ms, nil, marshalFn); err != nil { |
| 53 | return 0, err |
| 54 | } |
| 55 | var operr error |
| 56 | var n int |
| 57 | fn := func(s uintptr) bool { |
| 58 | n, operr = sendmmsg(s, hs, flags) |
| 59 | if operr == syscall.EAGAIN { |
| 60 | return false |
| 61 | } |
| 62 | return true |
| 63 | } |
| 64 | if err := c.c.Write(fn); err != nil { |
| 65 | return n, err |
| 66 | } |
| 67 | if operr != nil { |
| 68 | return n, os.NewSyscallError("sendmmsg", operr) |
| 69 | } |
| 70 | if err := hs[:n].unpack(ms[:n], nil, ""); err != nil { |
| 71 | return n, err |
| 72 | } |
| 73 | return n, nil |
| 74 | } |