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only create a CIDRTree for each host if necessary (#198)

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A CIDRTree can be expensive to create, so only do it if we need
it. If the remote host only has one IP address and no subnets, just do
an exact IP match instead.

Fixes: #171
This commit is contained in:
Wade Simmons 2020-03-02 16:21:33 -05:00 • committed by GitHub
parent 1cb3201b5e
commit add1b21777
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3 changed files with 19 additions and 2 deletions
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5
hostmap.go
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@ -623,6 +623,11 @@ func (i *HostInfo) RecvErrorExceeded() bool {
}
func (i *HostInfo) CreateRemoteCIDR(c *cert.NebulaCertificate) {
if len(c.Details.Ips) == 1 && len(c.Details.Subnets) == 0 {
// Simple case, no CIDRTree needed
return
}
remoteCidr := NewCIDRTree()
for _, ip := range c.Details.Ips {
remoteCidr.AddCIDR(&net.IPNet{IP: ip.IP, Mask: net.IPMask{255, 255, 255, 255}}, struct{}{})