65 lines
1.5 KiB
Go
65 lines
1.5 KiB
Go
package allregions
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// Region contains cloudflared edge addresses. The edge is partitioned into several regions for
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// redundancy purposes.
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type AddrSet map[*EdgeAddr]UsedBy
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// AddrUsedBy finds the address used by the given connection in this region.
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// Returns nil if the connection isn't using any IP.
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func (a AddrSet) AddrUsedBy(connID int) *EdgeAddr {
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for addr, used := range a {
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if used.Used && used.ConnID == connID {
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return addr
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}
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}
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return nil
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}
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// AvailableAddrs counts how many unused addresses this region contains.
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func (a AddrSet) AvailableAddrs() int {
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n := 0
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for _, usedby := range a {
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if !usedby.Used {
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n++
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}
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}
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return n
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}
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// GetUnusedIP returns a random unused address in this region.
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// Returns nil if all addresses are in use.
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func (a AddrSet) GetUnusedIP(excluding *EdgeAddr) *EdgeAddr {
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for addr, usedby := range a {
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if !usedby.Used && addr != excluding {
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return addr
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}
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}
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return nil
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}
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// Use the address, assigning it to a proxy connection.
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func (a AddrSet) Use(addr *EdgeAddr, connID int) {
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if addr == nil {
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return
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}
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a[addr] = InUse(connID)
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}
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// GetAnyAddress returns an arbitrary address from the region.
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func (a AddrSet) GetAnyAddress() *EdgeAddr {
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for addr := range a {
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return addr
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}
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return nil
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}
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// GiveBack the address, ensuring it is no longer assigned to an IP.
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// Returns true if the address is in this region.
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func (a AddrSet) GiveBack(addr *EdgeAddr) (ok bool) {
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if _, ok := a[addr]; !ok {
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return false
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}
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a[addr] = Unused()
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return true
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}
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