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icmp_zos.go (611B)

      1 // Copyright 2020 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 ipv6
      6 
      7 func (f *icmpv6Filter) accept(typ ICMPType) {
      8 	f.Filt[typ>>5] |= 1 << (uint32(typ) & 31)
      9 
     10 }
     11 
     12 func (f *icmpv6Filter) block(typ ICMPType) {
     13 	f.Filt[typ>>5] &^= 1 << (uint32(typ) & 31)
     14 
     15 }
     16 
     17 func (f *icmpv6Filter) setAll(block bool) {
     18 	for i := range f.Filt {
     19 		if block {
     20 			f.Filt[i] = 0
     21 		} else {
     22 			f.Filt[i] = 1<<32 - 1
     23 		}
     24 	}
     25 }
     26 
     27 func (f *icmpv6Filter) willBlock(typ ICMPType) bool {
     28 	return f.Filt[typ>>5]&(1<<(uint32(typ)&31)) == 0
     29 }