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xtaci
2020-10-09 22:38:31 +08:00
parent ce66a98f95
commit bdaf81e88e
1 changed files with 2 additions and 0 deletions
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sess.go
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@@ -814,12 +814,14 @@ func (l *Listener) packetInput(data []byte, addr net.Addr) {
convRecovered := false
fecFlag := binary.LittleEndian.Uint16(data[4:])
if fecFlag == typeData || fecFlag == typeParity { // 16bit kcp cmd [81-84] and frg [0-255] will not overlap with FEC type 0x00f1 0x00f2
// packet with FEC
if fecFlag == typeData && len(data) >= fecHeaderSizePlus2+IKCP_OVERHEAD {
conv = binary.LittleEndian.Uint32(data[fecHeaderSizePlus2:])
sn = binary.LittleEndian.Uint32(data[fecHeaderSizePlus2+IKCP_SN_OFFSET:])
convRecovered = true
}
} else {
// packet without FEC
conv = binary.LittleEndian.Uint32(data)
sn = binary.LittleEndian.Uint32(data[IKCP_SN_OFFSET:])
convRecovered = true