Sending Packets to server

[Skw972]

Hi. I need your help. I want to send a packet to the server which makes mi click item in the chosen slot. I already have gui, Container and Slot but don't know how to send packets. I created channel and Network but there are no tutorials how to send packet to do something in gui. Can somebody help me or send a tutorial where someone tells how to perform actions in gui. Like putting or taking items.

[Luis_ST]

https://forge.gemwire.uk/wiki/SimpleChannel#Sending_to_the_Server

[Skw972]

  On 3/28/2022 at 1:40 PM, Luis_ST said:

https://forge.gemwire.uk/wiki/SimpleChannel#Sending_to_the_Server

Expand  

It doesn't help at all. 

[Luis_ST]

why? what's your problem?

[Skw972]

I don't know how to send a packet that I took item from the slot. I know only how to send IMessage.

[Luis_ST]

you can get the current AbstractContainerMenu from the player it's a public field,
make sure before you interacte with the Menu your are on Server and ServerPlayer#containerCounter match with the
containerId of the Menu. Then you can get the Slot via AbstractContainerMenu#getSlot

[Skw972]

But I don't think you understand what I mean. I already have gui and a Slot. I need to create mod only for client because I want to use it not on my server. And I want to take an item or click the chosen Slot in the gui. I just need to make server register this action.

[Luis_ST]

This will not work client only, it also sounds like cheating...
If this is your server, why did you not create a Mod for both server and client

Edited March 28, 2022 by Luis_ST
spelling mistake

[Skw972]

  On 3/28/2022 at 7:04 PM, Luis_ST said:

This will not work client only, it also sounds like cheating...
If this is your server, why did you not create a Mob for both server and client

Expand  

???. I said it isn't my server and what do you mean by creating a Mob? I don't need any mobs.

[Luis_ST]

  On 3/28/2022 at 7:09 PM, Skw972 said:

I said it isn't my server and what do you mean by creating a Mob?

Expand  

it was a spelling mistake😅, i already fixed it
What exactly did you try to achieve?

Edited March 28, 2022 by Luis_ST

[Skw972]

  On 3/28/2022 at 7:13 PM, Luis_ST said:

it was a spelling mistake😅, i already fixed it
What exactly did you try to achieve?

Expand  

I'm trying to click in the chosen slot when player opens a gui. I already made a event which checks if gui is correct and I already have chosen slot. Now I only need to click this slot from client side but I have to make it register on the server. So if I click item in chest it makes it click on the server too. Just like the player normally clicked it. I could create a list of coordinates for every slot and then move it to chosen coords and make mouse click in program but I know that there has to be a better way to do it.

Edited March 30, 2022 by Skw972

[Luis_ST]

  On 3/30/2022 at 2:21 PM, Skw972 said:

I'm trying to click in the chosen slot when player opens a gui. I already made a event which checks if gui is correct and I already have chosen slot. Now I only need to click this slot from client side but I have to make it register on the server. So if I click item in chest it makes it click on the server too. Just like the player normally clicked it.

Expand  

this is not the reason for why you do this from client

  On 3/30/2022 at 2:21 PM, Skw972 said:

I know that there has to be a better way to do it.

Expand  

yeah do it from server

[Skw972]

  On 3/30/2022 at 3:18 PM, Luis_ST said:

this is not the reason for why you do this from client

yeah do it from server

Expand  

 I said I CAN'T do it from server.

[Luis_ST]

please answer my question

  On 3/30/2022 at 3:18 PM, Luis_ST said:

why you do this from client

Expand  

 

[LZDQ]

Bro I wrote a python script to sort my slots. I send http request from java to python and sort my slots within 1s.

[LZDQ]

  On 2/10/2024 at 3:35 PM, LZDQ said:

Bro I wrote a python script to sort my slots. I send http request from java to python and sort my slots within 1s.

Expand  

Hi there. Today I figured out how to send a packet of swapping two items in inventory by hovering on one and press the hotbar button of another. Clicking one is similar.

First I intercept all the outgoing packets and found one called `net.minecraft.network.protocol.game.ServerboundContainerClickPacket` which does the exactly thing you wished for.

Then search the source code (I get it in intellij idea's cache) and use grep to find all occurences (or you can use intellij or other IDE to grab all references but my IDEs all failed to do that) and read the code. Finally the wrapper for doing modification client-side and sending packet is `Minecraft.getInstance().gameMode.handleInventoryMouseClick`.

My code here:
 

    private static void swapSlot(int slot_from, int slot_to){
        // slot_from is the inventory id (for hotbar, it is [36, 45) )
        // slot_to is the hotbar id [0, 9)
        Minecraft mc = Minecraft.getInstance();
        //mc.player.sendOpenInventory();   We don't even need to open the inventory. Actually there is not a packet telling server to open inventory, only a packet of telling server to close it but we don't need it either.
        //Inventory inventory = mc.player.getInventory();
        InventoryMenu inv_menu = mc.player.inventoryMenu;
        mc.gameMode.handleInventoryMouseClick(
                inv_menu.containerId,
                slot_from,
                slot_to,
                ClickType.SWAP,
                mc.player
        );
    }