Advance Packet data

Subject: Advance Packet data Wed Nov 10, 2010 4:29 am

Hello Guest, welcome to a Advance tutorial over psp Packet data.

I wrote this awhile back when i was learning about all this ****. Big help to Hokage and Poorkingz. This tutorial is written on Socom ftb2 1.6 patch.

Some packet info:

Code:: FNC 0x088EE67C: A function used to send some (not all) kinds of packets
Params: a0, a1, a2, a3, t0, t1, t2
a0: A pointer; usually 0x08D044D8. Other values might freeze you.
a1: A byte; usually 0x40. Other values will boot others.
a2: A word; usually 0xFFFFFFFF or an above zero number. Might be related to priority.
a3: A byte. This tells others what kind of packet you are sending (such as vote, taunt, or shoot).
t0: A half-word. Size of packet data. Incorrect values for size will boot others. (Probably to prevent overflows.)
t1: A pointer. Points to the data that will be sent to others.
t2: A boolean. Not sure what this is for.

Correct params to send Spectator Ejected packet:

Code:: a0: 0x08D044D8
a1: 0x00000040
a2: 0xFFFFFFFF
a3: 0x00000008
t0: 0x00000004
t1: A pointer. Nothing seems to be read from it. Can point to anything.
t2: True. Any non-zero number.

FNC 0x0890223C: Receiving

Template:

Code:: #Spectator Ejected packet
0x07d00000 0x27bdfff0 ; addiu sp, sp, -0x10 //we only need 0x8 bytes but it's protocol to round up to nearest 0x10
0x07d00004 0xafb00000; sw s0, $0000(sp) //we save any s registers we use
0x07d00008 0xafbf0004; sw ra, $0004(sp) //we save ra when we use a jal in the function
0x07d0000c 0x3c0408d0; lui a0, $08d0
0x07d00010 0x248444d8; addiu a0, a0, $44d8 //a0 set for sending
0x07d00014 0x34050040; ori a1, zero, $0040 //a1 set for sending
0x07d00018 0x2406ffff; addiu a2, zero, $ffff //a2 set for sending
0x07d0001c 0x34070008; ori a3, zero, $0008 //a3 set for sending
0x07d00020 0x34080004; ori t0, zero, $0004 //t0 set for sending
0x07d00024 0x3c100880; lui s0, $0880
0x07d00028 0x26100000; addiu s0, s0, $0000 //pointer for sending and receiving functions (needs to be in a saved register because it's used after a jal)
0x07d0002c 0x02004821; addu t1, s0, zero //t1 set for sending
0x07d00030 0x0e23b99f; jal $088ee67c // Send packet function
0x07d00034 0x340a0001; ori t2, zero, $0001 //t2 set for sending (takes advantage of jump delay)
0x07d00038 0x0e24088f; jal $0890223c // Receive Spectator Ejected function (so we can see spectator ejected too)
0x07d0003c 0x02003821; addu a3, s0, zero //not needed for spectator, but needed for most other packets
0x07d00040 0x8fb00000; lw s0, $0000(sp)
0x07d00044 0x8fbf0004; lw ra, $0004(sp)
0x07d00048 0x03e00008; jr ra //end
0x07d0004c 0x27bd0010; addiu sp, sp, $0010 //pop stack
Hook goes here

I hope this helps anyone working with functions or stacks. Don't post this ANYWHERE else without my permission. I never did test the code, but it should work.

-Tutorial brought to you by MiLk coders-
-WarCrazy-

Subject: Re: Advance Packet data Wed Nov 10, 2010 5:28 am

i basically gave up on MIPS i found it useless, i learned some stuff but i gave up. idk if its worth continuing.i stopped on learning stack

Subject: Re: Advance Packet data Wed Nov 10, 2010 1:46 pm

Its not worth it. It took me about 3 years to become '1337' and that was just a waist of breathe.

Subject: Re: Advance Packet data Wed Nov 10, 2010 3:08 pm

lol, but in reality WC is a genius when it comes to MIPS, this is acutally extremely helpful, rep+ for this one.

im about to try out the code, ill post the results.

Newbie Posts : 26 1337ness : 1 Join date : 2011-08-06

lol "Hello DeToX"

Subject: Re: Advance Packet data Tue Aug 09, 2011 9:31 pm

Hello JZydex and nice rep +