Comments (6)
gurland
commented on July 27, 2024
1
I found that packet http://wiki.vg/Protocol#Player_Block_Placement by looking at raw representation of sent packet.
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MiniDigger
commented on July 27, 2024
you want to take a look at the use item packet
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gurland
commented on July 27, 2024
I'm trying this
class UseItemPacket(Packet):
@staticmethod
def get_id(context):
return 0x20
packet_name = 'use item'
get_definition = staticmethod(lambda context: [
{'hand': VarInt}
])
...
while True:
try:
text = input()
if text == "/rmb":
print("Pressing")
packet = UseItemPacket()
packet.hand = 0
connection.write_packet(packet)
else:
packet = serverbound.play.ChatPacket()
packet.message = text
connection.write_packet(packet)
except KeyboardInterrupt:
print("Bye!")
sys.exit()What's in log:
/rmb
Pressing
<-- 0x20 UseItemPacket(hand=0)
And nothing else. After issuing /home command (which is aviable only after clicking on that sign) nothing happens (server says Unknown command).
After that I was searching for logging debug info (especially network packets). So I made this config active (http://wiki.vg/Debugging#Network_packets_only).
Here is log:
# Here I'm clicking
[15:17:42] [Netty Epoll Client IO #0/DEBUG]: OUT: [PLAY:13] lk$a
[15:17:42] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:71] ko
[15:17:43] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:9] ih
[15:17:43] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:9] ih
[15:17:43] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:9] ih
[15:17:43] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:9] ih
[15:17:43] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:9] ih
[15:17:43] [Netty Epoll Client IO #0/DEBUG]: OUT: [PLAY:31] ma
[15:17:43] [Netty Epoll Client IO #0/DEBUG]: OUT: [PLAY:29] ly
[15:17:43] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:15] in
[15:17:43] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:20] is
[15:17:43] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:22] iu
[15:17:43] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:22] iu
[15:17:43] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:11] ij
[15:17:43] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:11] ij
[15:17:43] [main/INFO]: [CHAT] You do not have permission to build here.
# That's written after click
[15:17:43] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:15] in
[15:17:43] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:46] jp
[15:17:43] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:53] jw
[15:17:43] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:53] jw
[15:17:43] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:24] iw
[15:17:43] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:24] iw
[15:17:43] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:13] il
[15:17:43] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:44] jn
[15:17:43] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:58] kb
[15:17:43] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:27] iz
[15:17:43] [main/INFO]: [CHAT] Welcome to alpha!
[15:17:43] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:49] js
[15:17:44] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:15] in
[15:17:44] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:15] in
[15:17:44] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:15] in
[15:17:44] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:15] in
[15:17:44] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:15] in
[15:17:44] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:15] in
[15:17:44] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:15] in
[15:17:44] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:15] in
[15:17:44] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:15] in
[15:17:44] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:15] in
[15:17:44] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:15] in
[15:17:44] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:15] in
[15:17:44] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:15] in
[15:17:44] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:15] in
[15:17:44] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:15] in
[15:17:44] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:15] in
[15:17:44] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:46] jp
[15:17:44] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:46] jp
[15:17:44] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:46] jp
[15:17:44] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:46] jp
[15:17:44] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:46] jp
[15:17:44] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:46] jp
[15:17:44] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:46] jp
[15:17:44] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:46] jp
[15:17:44] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:46] jp
[15:17:44] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:46] jp
[15:17:44] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:46] jp
[15:17:44] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:46] jp
[15:17:44] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:46] jp
[15:17:44] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:46] jp
[15:17:44] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:46] jp
[15:17:44] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:73] kq
[15:17:44] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:73] kq
[15:17:44] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:73] kq
[15:17:44] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:73] kq
[15:17:44] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:32] je
[15:17:44] [Netty Epoll Client IO #0/DEBUG]: IN: [PLAY:0] hx
# Now I'm on the server
Unfortunately I'm not able to understand packets in that representation.
So I skimmed wiki and found that packet. I think it's much more suitable in my case. But I don't know how work with it. Maybe Target field should contain entity id? But I haven't found sign entity ID so I'm confused how to construct packets now...
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gurland
commented on July 27, 2024
I thought if there is no entity id for sign then I can try use entity by cords so I tried this code:
class UseEntityPacket(Packet):
@staticmethod
def get_id(context):
return 0x0A
packet_name = 'use entity'
get_definition = staticmethod(lambda context: [
{'target': VarInt},
{'type': VarInt},
{'x': Float},
{'y': Float},
{'z': Float},
{'hand': VarInt},
])
...
if text == "/rmb":
print("Pressing")
packet = UseEntityPacket()
packet.target = 1
packet.type = 2
packet.x = 1400.2
packet.y = 6
packet.z = 1293.3
packet.hand = 0
connection.write_packet(packet)But unfortunately nothing happens. Same result as in previous code, so I really require some help
Also @joodicator add question label please and maybe try to help me solve my problem
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gurland
commented on July 27, 2024
I've decompiled minecraft using Mod Coder Pack and inserted some debugging code. Here we are, now I know exact packets which real game sends:
OUT: [PLAY:31] net.minecraft.network.play.client.CPacketPlayerTryUseItemOnBlock
OUT: [PLAY:29] net.minecraft.network.play.client.CPacketAnimation
[10:07:28] [Client thread/INFO]: [CHAT] You do not have permission to build here.
OUT: [PLAY:13] net.minecraft.network.play.client.CPacketPlayer$Position
[10:07:28] [Client thread/INFO]: [CHAT] Welcome to alpha!
...
TryUseItemOnBlock: pos[BlockPos{x=1399, y=5, z=1293}] | dir[west] | hand[MAIN_HAND] | x[0.875] | y[0.468] | z[0.686]
So I've almost got to the point
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gurland
commented on July 27, 2024
Yes, I finally made this.
Also I found bug in Position type so I'll fix it in pull request.
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