Function at 0x4b21e9
Capabilities:
Send data
Send data on socket

Disassembly:
push esi
mov esi, eax
mov eax, dword [esi + 0x10]
push edi
mov edi, dword [eax]
mov eax, dword [esp + 0xc]
add eax, 0xfffffffd
cmp eax, 4
ja case.0x4b20c9.4
jmp dword [eax*4 + 0x4b2364]
mov ecx, dword [esi + 0x15c]
movzx dx, byte [ecx + 2]
movzx ecx, byte [ecx + 3]
shl dx, 8
movzx eax, dx
movzx edx, word [esi + 0x40]
inc edx
or eax, ecx
and edx, 0xffff
cmp edx, eax
je 0x4b2136
push eax
push str.Received_unexpected_DATA_packet_block__d_n
push edi
call fcn.004a7be0
inc dword [esi + 0x18]
mov eax, dword [esi + 0x18]
add esp, 0xc
cmp eax, dword [esi + 0x20]
jle 0x4b2341
movzx eax, word [esi + 0x40]
inc eax
and eax, 0xffff
push eax
push str.tftp_rx:_giving_up_waiting_for_block__d
push edi
call fcn.004a7c70
add esp, 0xc
pop edi
mov eax, 0x47
pop esi
ret
mov word [esi + 0x40], ax
mov dword [esi + 0x18], 0
mov ecx, dword [esi + 0x160]
mov byte [ecx], 0
mov edx, dword [esi + 0x160]
mov byte [edx + 1], 4
movzx eax, word [esi + 0x40]
mov edx, dword [esi + 0x160]
mov ecx, eax
shr ecx, 8
mov byte [edx + 2], cl
mov ecx, dword [esi + 0x160]
mov byte [ecx + 3], al
mov edx, dword [esi + 0x148]
mov ecx, dword [esi + 0x160]
push edx
mov edx, dword [esi + 0x14]
lea eax, [esi + 0xc8]
push eax
push 0
push 4
push ecx
push edx
call dword [sym.imp.WS2_32.dll_sendto]
test eax, eax
jge 0x4b21bd
call dword [sym.imp.WS2_32.dll_WSAGetLastError]
push eax
mov eax, dword [esi + 0x10]
push eax
call fcn.004c2d00
push eax
push 0x5517a4
push edi
call fcn.004a7c70
add esp, 0x14
pop edi
mov eax, 0x37
pop esi
ret
mov ecx, dword [esi + 0x154]
xor edx, edx
add ecx, 4
cmp dword [esi + 0x14c], ecx
setl dl
add esi, 0x38
push esi
lea edx, [edx + edx + 1]
mov dword [esi - 0x38], edx
call fcn.00537ace
add esp, 4
pop edi
xor eax, eax
pop esi
ret
xor eax, eax
mov word [esi + 0x40], ax
mov dword [esi + 0x18], eax
mov ecx, dword [esi + 0x160]
mov byte [ecx], al
mov edx, dword [esi + 0x160]
mov byte [edx + 1], 4
movzx eax, word [esi + 0x40]
mov edx, dword [esi + 0x160]
mov ecx, eax
shr ecx, 8
mov byte [edx + 2], cl
mov ecx, dword [esi + 0x160]
mov byte [ecx + 3], al
mov edx, dword [esi + 0x148]
mov ecx, dword [esi + 0x160]
push edx
mov edx, dword [esi + 0x14]
lea eax, [esi + 0xc8]
push eax
push 0
push 4
push ecx
push edx
call dword [sym.imp.WS2_32.dll_sendto]
test eax, eax
jl 0x4b2196
mov dword [esi], 1
add esi, 0x38
push esi
call fcn.00537ace
add esp, 4
pop edi
xor eax, eax
pop esi
ret
movzx ecx, word [esi + 0x40]
inc dword [esi + 0x18]
mov eax, dword [esi + 0x18]
push eax
inc ecx
and ecx, 0xffff
push ecx
push str.Timeout_waiting_for_block__d_ACK.__Retries___d_n
push edi
call fcn.004a7be0
mov edx, dword [esi + 0x18]
add esp, 0x10
cmp edx, dword [esi + 0x20]
jle 0x4b229c
pop edi
mov dword [esi + 8], 0xffffff9d
mov dword [esi], 3
xor eax, eax
pop esi
ret
mov eax, dword [esi + 0x148]
mov edx, dword [esi + 0x160]
push eax
mov eax, dword [esi + 0x14]
lea ecx, [esi + 0xc8]
push ecx
push 0
push 4
push edx
push eax
call dword [sym.imp.WS2_32.dll_sendto]
test eax, eax
jge 0x4b2341
call dword [sym.imp.WS2_32.dll_WSAGetLastError]
mov ecx, dword [esi + 0x10]
push eax
push ecx
call fcn.004c2d00
push eax
push 0x5517a4
push edi
call fcn.004a7c70
add esp, 0x14
pop edi
mov eax, 0x37
pop esi
ret
mov edx, dword [esi + 0x160]
mov byte [edx], 0
mov eax, dword [esi + 0x160]
mov byte [eax + 1], 5
movzx eax, word [esi + 0x40]
mov edx, dword [esi + 0x160]
mov ecx, eax
shr ecx, 8
mov byte [edx + 2], cl
mov ecx, dword [esi + 0x160]
mov byte [ecx + 3], al
mov edx, dword [esi + 0x148]
mov ecx, dword [esi + 0x160]
push edx
mov edx, dword [esi + 0x14]
lea eax, [esi + 0xc8]
push eax
push 0
push 4
push ecx
push edx
call dword [sym.imp.WS2_32.dll_sendto]
mov dword [esi], 3
pop edi
xor eax, eax
pop esi
ret
push str.tftp_rx:_internal_error
push 0x5517a4
push edi
call fcn.004a7c70
add esp, 0xc
pop edi
mov eax, 0x47
pop esi
ret