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81 lines
1.2 KiB
81 lines
1.2 KiB
package p2p
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import (
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"net"
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"sync"
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)
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// ConnSet is a lookup table for connections and all their ips.
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type ConnSet interface {
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Has(net.Conn) bool
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HasIP(net.IP) bool
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Set(net.Conn, []net.IP)
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Remove(net.Conn)
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RemoveAddr(net.Addr)
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}
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type connSetItem struct {
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conn net.Conn
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ips []net.IP
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}
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type connSet struct {
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sync.RWMutex
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conns map[string]connSetItem
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}
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// NewConnSet returns a ConnSet implementation.
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func NewConnSet() ConnSet {
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return &connSet{
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conns: map[string]connSetItem{},
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}
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}
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func (cs *connSet) Has(c net.Conn) bool {
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cs.RLock()
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defer cs.RUnlock()
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_, ok := cs.conns[c.RemoteAddr().String()]
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return ok
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}
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func (cs *connSet) HasIP(ip net.IP) bool {
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cs.RLock()
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defer cs.RUnlock()
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for _, c := range cs.conns {
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for _, known := range c.ips {
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if known.Equal(ip) {
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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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func (cs *connSet) Remove(c net.Conn) {
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cs.Lock()
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defer cs.Unlock()
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delete(cs.conns, c.RemoteAddr().String())
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}
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func (cs *connSet) RemoveAddr(addr net.Addr) {
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cs.Lock()
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defer cs.Unlock()
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delete(cs.conns, addr.String())
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}
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func (cs *connSet) Set(c net.Conn, ips []net.IP) {
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cs.Lock()
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defer cs.Unlock()
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cs.conns[c.RemoteAddr().String()] = connSetItem{
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conn: c,
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ips: ips,
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}
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}
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