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[client] Add embeddable library (#3239)

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This commit is contained in:
Viktor Liu
2025-02-20 13:22:03 +01:00
committed by GitHub
parent 39986b0e97
commit 631ef4ed28
22 changed files with 648 additions and 51 deletions
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20
util/net/net.go
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@ -1,6 +1,7 @@
package net
import (
"math/big"
"net"
"github.com/google/uuid"
@ -26,3 +27,22 @@ type RemoveHookFunc func(connID ConnectionID) error
func GenerateConnID() ConnectionID {
return ConnectionID(uuid.NewString())
}
func GetLastIPFromNetwork(network *net.IPNet, fromEnd int) net.IP {
// Calculate the last IP in the CIDR range
var endIP net.IP
for i := 0; i < len(network.IP); i++ {
endIP = append(endIP, network.IP[i]|^network.Mask[i])
}
// convert to big.Int
endInt := big.NewInt(0)
endInt.SetBytes(endIP)
// subtract fromEnd from the last ip
fromEndBig := big.NewInt(int64(fromEnd))
resultInt := big.NewInt(0)
resultInt.Sub(endInt, fromEndBig)
return resultInt.Bytes()
}