forked from TrueCloudLab/frostfs-node
132 lines
2.7 KiB
Go
132 lines
2.7 KiB
Go
package network
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import (
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"errors"
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"sort"
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"github.com/nspcc-dev/neofs-api-go/pkg/netmap"
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)
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// AddressGroup represents list of network addresses of the node.
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//
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// List is sorted by priority of use.
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type AddressGroup []Address
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// StringifyGroup returns concatenation of all addresses
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// from the AddressGroup.
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//
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// The result is order-dependent.
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func StringifyGroup(x AddressGroup) string {
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var s string
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x.IterateAddresses(func(addr Address) bool {
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s += addr.String()
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return false
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})
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return s
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}
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// IterateAddresses iterates over all network addresses of the node.
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//
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// Breaks iterating on handler's true return.
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//
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// Handler should not be nil.
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func (x AddressGroup) IterateAddresses(f func(Address) bool) {
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for i := range x {
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if f(x[i]) {
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break
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}
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}
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}
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// Len returns number of addresses in AddressGroup.
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func (x AddressGroup) Len() int {
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return len(x)
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}
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// Less returns true if i-th address in AddressGroup supports TLS
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// and j-th one doesn't.
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func (x AddressGroup) Less(i, j int) bool {
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return x[i].TLSEnabled() && !x[j].TLSEnabled()
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}
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// Swap swaps i-th and j-th addresses in AddressGroup.
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func (x AddressGroup) Swap(i, j int) {
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x[i], x[j] = x[j], x[i]
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}
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// MultiAddressIterator is an interface of network address group.
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type MultiAddressIterator interface {
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// Must iterate over network addresses and pass each one
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// to the handler until it returns true.
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IterateAddresses(func(string) bool)
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// Must return number of addresses in group.
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NumberOfAddresses() int
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}
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// FromIterator forms AddressGroup from MultiAddressIterator structure.
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// The result is sorted with sort.Sort.
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//
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// Returns an error in the absence of addresses or if any of the addresses are incorrect.
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func (x *AddressGroup) FromIterator(iter MultiAddressIterator) (err error) {
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as := *x
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addrNum := iter.NumberOfAddresses()
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if addrNum <= 0 {
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err = errors.New("missing network addresses")
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return
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}
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if cap(as) >= addrNum {
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as = as[:0]
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} else {
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as = make(AddressGroup, 0, addrNum)
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}
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iter.IterateAddresses(func(s string) bool {
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var a Address
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err = a.FromString(s)
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fail := err != nil
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if !fail {
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as = append(as, a)
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}
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return fail
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})
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if err == nil {
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sort.Sort(as)
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*x = as
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}
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return
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}
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// WriteToNodeInfo writes AddressGroup to netmap.NodeInfo structure.
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func (x AddressGroup) WriteToNodeInfo(ni *netmap.NodeInfo) {
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addrs := make([]string, len(x))
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for i := range x {
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addrs[i] = x[i].String()
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}
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ni.SetAddresses(addrs...)
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}
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// Intersects checks if two AddressGroup have
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// at least one common address.
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func (x AddressGroup) Intersects(x2 AddressGroup) bool {
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for i := range x {
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for j := range x2 {
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if x[i].equal(x2[j]) {
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return true
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}
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}
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}
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return false
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}
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