diff options
Diffstat (limited to 'src/syscall/syscall_linux.go')
| -rw-r--r-- | src/syscall/syscall_linux.go | 40 |
1 files changed, 22 insertions, 18 deletions
diff --git a/src/syscall/syscall_linux.go b/src/syscall/syscall_linux.go index 76afab0bfc..2d2863690d 100644 --- a/src/syscall/syscall_linux.go +++ b/src/syscall/syscall_linux.go @@ -541,15 +541,17 @@ func Recvmsg(fd int, p, oob []byte, flags int) (n, oobn int, recvflags int, from } var dummy byte if len(oob) > 0 { - var sockType int - sockType, err = GetsockoptInt(fd, SOL_SOCKET, SO_TYPE) - if err != nil { - return - } - // receive at least one normal byte - if sockType != SOCK_DGRAM && len(p) == 0 { - iov.Base = &dummy - iov.SetLen(1) + if len(p) == 0 { + var sockType int + sockType, err = GetsockoptInt(fd, SOL_SOCKET, SO_TYPE) + if err != nil { + return + } + // receive at least one normal byte + if sockType != SOCK_DGRAM { + iov.Base = &dummy + iov.SetLen(1) + } } msg.Control = &oob[0] msg.SetControllen(len(oob)) @@ -593,15 +595,17 @@ func SendmsgN(fd int, p, oob []byte, to Sockaddr, flags int) (n int, err error) } var dummy byte if len(oob) > 0 { - var sockType int - sockType, err = GetsockoptInt(fd, SOL_SOCKET, SO_TYPE) - if err != nil { - return 0, err - } - // send at least one normal byte - if sockType != SOCK_DGRAM && len(p) == 0 { - iov.Base = &dummy - iov.SetLen(1) + if len(p) == 0 { + var sockType int + sockType, err = GetsockoptInt(fd, SOL_SOCKET, SO_TYPE) + if err != nil { + return 0, err + } + // send at least one normal byte + if sockType != SOCK_DGRAM { + iov.Base = &dummy + iov.SetLen(1) + } } msg.Control = &oob[0] msg.SetControllen(len(oob)) |