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Diffstat (limited to 'dhcpv4/option_routes.go')
| -rw-r--r-- | dhcpv4/option_routes.go | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/dhcpv4/option_routes.go b/dhcpv4/option_routes.go index 603273a..c98d481 100644 --- a/dhcpv4/option_routes.go +++ b/dhcpv4/option_routes.go @@ -38,6 +38,9 @@ func (r Route) Marshal(buf *uio.Lexer) { // Unmarshal implements uio.Unmarshaler. func (r *Route) Unmarshal(buf *uio.Lexer) error { maskSize := buf.Read8() + if maskSize > 32 { + return fmt.Errorf("invalid mask length %d in route option", maskSize) + } r.Dest = &net.IPNet{ IP: make([]byte, net.IPv4len), Mask: net.CIDRMask(int(maskSize), 32), |