File size: 3,333 Bytes
d7c5875 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 | local client = {}
local bstream = require("snet.bstream")
client.address = "127.0.0.1"
client.port = 13322
client.status = SNET_DISCONNECTED
client.unique_id = 0
client.last_ids = {}
client.events = {}
client.packets = {}
function client:add_event_handler(event, callback)
table.insert(self.events, {event, callback})
end
local function get_packet(object)
local data = object.socket:receive()
if data then
if data:sub(1, 1):byte() ~= 0x0 then return false end
data = data:sub(2, #data)
return data
end
return false
end
local function receive_packet(object)
local data = get_packet(object)
if not data then return false end
local clean_data = data:sub(10, #data)
data = bstream.new(data)
local unique_id = data:read(BS_UINT32)
local packet_id = data:read(BS_UINT32)
local priority = data:read(BS_UINT8)
if priority > 0 then
local new_bs = bstream.new()
new_bs:write(BS_UINT32, unique_id)
object:send(SNET_CONFIRM_PRIORITY, new_bs, SNET_BYPASS_PRIORITY)
end
for i, v in ipairs(object.last_ids) do
if v == unique_id then
return false
end
end
if #object.last_ids >= 10 then table.remove(object.last_ids, 1) end
table.insert(object.last_ids, unique_id)
object.status = SNET_CONNECTED
for i, v in ipairs(object.events) do
if v[1] == 'onReceivePacket' then
v[2](packet_id, bstream.new(clean_data))
end
end
if packet_id == SNET_CONFIRM_PRIORITY then
local conf_bs = bstream.new(clean_data)
local conf_id = conf_bs:read(BS_UINT32)
for i = #object.packets, 1, -1 do
if object.packets[i].unique_id == conf_id then
table.remove(object.packets, i)
break
end
end
end
return true
end
local function send_packet(object, unique_id, packet_id, priority, bytes)
local data = bstream.new(bytes)
data.write_ptr = 1
data:write(BS_UINT32, unique_id)
data:write(BS_UINT32, packet_id)
data:write(BS_UINT8, priority)
return object.socket:send('\0' .. data.bytes .. '\0')
end
function client:send(packet_id, stream, priority)
local unique_id = self.unique_id
self.unique_id = self.unique_id + 1
if self.unique_id >= 4294967295 then
self.unique_id = 0
end
send_packet(self, unique_id, packet_id, priority, stream.bytes)
if priority > 0 then
table.insert(self.packets, {
unique_id = unique_id, packet_id = packet_id,
priority = priority, bytes = stream.bytes,
times = 0, last_time = os.time()
})
end
return true
end
local function resend_packets(object)
for i = #object.packets, 1, -1 do
local v = object.packets[i]
if os.time() ~= v.last_time then
v.last_time = os.time()
v.times = v.times + 1
send_packet(object, v.unique_id, v.packet_id, v.priority, v.bytes)
if v.priority == SNET_SYSTEM_PRIORITY and object.status ~= SNET_CONNECTED then table.remove(object.packets, i)
elseif v.priority == SNET_HIGH_PRIORITY and v.times >= 20 then table.remove(object.packets, i)
elseif v.priority == SNET_MEDIUM_PRIORITY and v.times >= 10 then table.remove(object.packets, i)
elseif v.priority == SNET_LOW_PRIORITY and v.times >= 5 then table.remove(object.packets, i) end
end
end
return true
end
function client:process()
receive_packet(self)
resend_packets(self)
end
return client |