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peer.go
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peer.go
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package dctoolkit
// Peer represents a remote client connected to a Hub.
type Peer struct {
// peer nickname
Nick string
// peer description (if provided)
Description string
// peer email (if provided)
Email string
// whether peer is a bot
IsBot bool
// whether peer is a operator
IsOperator bool
// client used by peer (in NMDC this could be hidden)
Client string
// version of client (in NMDC this could be hidden)
Version string
// overall size of files shared by peer
ShareSize uint64
// whether peer is in passive mode (in NMDC this could be hidden)
IsPassive bool
// peer ip (if provided by both peer and hub)
Ip string
adcSessionId string
adcClientId []byte
adcFingerprint string
adcSupports map[string]struct{}
adcUdpPort uint
nmdcConnection string
nmdcStatusByte byte
}
// Peers returns a map containing all the peers connected to current hub.
func (c *Client) Peers() map[string]*Peer {
return c.peers
}
func (c *Client) peerByNick(nick string) *Peer {
if p, ok := c.peers[nick]; ok {
return p
}
return nil
}
func (c *Client) peerBySessionId(sessionId string) *Peer {
for _, p := range c.peers {
if p.adcSessionId == sessionId {
return p
}
}
return nil
}
func (c *Client) peerByClientId(clientId []byte) *Peer {
for _, p := range c.peers {
if string(p.adcClientId) == string(clientId) {
return p
}
}
return nil
}
func (c *Client) peerSupportsEncryption(p *Peer) bool {
if c.protoIsAdc == true {
if p.adcFingerprint != "" {
return true
}
if _, ok := p.adcSupports[adcSupportTls]; ok {
return true
}
return false
} else {
// we check only for bit 4
return (p.nmdcStatusByte & (0x01 << 4)) == (0x01 << 4)
}
}
func (c *Client) peerRequestConnection(peer *Peer, adcToken string) {
if c.conf.IsPassive == false {
c.peerConnectToMe(peer, adcToken)
} else {
c.peerRevConnectToMe(peer, adcToken)
}
}
func (c *Client) peerConnectToMe(peer *Peer, adcToken string) {
if c.protoIsAdc == true {
c.connHub.conn.Write(&msgAdcDConnectToMe{
msgAdcTypeD{c.sessionId, peer.adcSessionId},
msgAdcKeyConnectToMe{
func() string {
if c.conf.PeerEncryptionMode != DisableEncryption && c.peerSupportsEncryption(peer) {
return adcProtocolEncrypted
}
return adcProtocolPlain
}(),
func() uint {
if c.conf.PeerEncryptionMode != DisableEncryption && c.peerSupportsEncryption(peer) {
return c.conf.TcpTlsPort
}
return c.conf.TcpPort
}(),
adcToken,
},
})
} else {
c.connHub.conn.Write(&msgNmdcConnectToMe{
Target: peer.Nick,
Ip: c.ip,
Port: func() uint {
if c.conf.PeerEncryptionMode != DisableEncryption && c.peerSupportsEncryption(peer) {
return c.conf.TcpTlsPort
}
return c.conf.TcpPort
}(),
Encrypted: (c.conf.PeerEncryptionMode != DisableEncryption && c.peerSupportsEncryption(peer)),
})
}
}
func (c *Client) peerRevConnectToMe(peer *Peer, adcToken string) {
if c.protoIsAdc == true {
c.connHub.conn.Write(&msgAdcDRevConnectToMe{
msgAdcTypeD{c.sessionId, peer.adcSessionId},
msgAdcKeyRevConnectToMe{
func() string {
if c.conf.PeerEncryptionMode != DisableEncryption && c.peerSupportsEncryption(peer) {
return adcProtocolEncrypted
}
return adcProtocolPlain
}(),
adcToken,
},
})
} else {
c.connHub.conn.Write(&msgNmdcRevConnectToMe{
Author: c.conf.Nick,
Target: peer.Nick,
})
}
}
func (c *Client) handlePeerConnected(peer *Peer) {
c.peers[peer.Nick] = peer
dolog(LevelInfo, "[hub] [peer on] %s (%v)", peer.Nick, peer.ShareSize)
if c.OnPeerConnected != nil {
c.OnPeerConnected(peer)
}
}
func (c *Client) handlePeerUpdated(peer *Peer) {
if c.OnPeerUpdated != nil {
c.OnPeerUpdated(peer)
}
}
func (c *Client) handlePeerDisconnected(peer *Peer) {
delete(c.peers, peer.Nick)
dolog(LevelInfo, "[hub] [peer off] %s", peer.Nick)
if c.OnPeerDisconnected != nil {
c.OnPeerDisconnected(peer)
}
}
func (c *Client) handlePeerRevConnectToMe(peer *Peer, adcToken string) {
// we can process RevConnectToMe only in active mode
if c.conf.IsPassive == false {
c.peerConnectToMe(peer, adcToken)
}
}