Function at 0x1400839c0
Capabilities:
Validate payment card number using luhn algorithm

Disassembly:
mov qword [rsp + 8], rbx
mov qword [rsp + 0x10], rbp
mov qword [rsp + 0x18], rsi
mov qword [rsp + 0x20], rdi
push r12
push r14
push r15
sub rsp, 0x50
mov r14, qword [rsp + 0x98]
xor r12d, r12d
mov r15, r9
mov rbp, r8
mov rsi, rdx
mov rdi, rcx
mov qword [r14], r12
movzx eax, byte [rdx]
cmp al, 0xa
je 0x140083f34
cmp al, 0xd
je 0x140083f34
lea r14, [rcx + 0x13c]
mov ebx, 4
mov ecx, dword [r14]
mov r15d, 1
lea eax, [rcx + 1]
mov dword [r14], eax
test ecx, ecx
jne 0x140083e4f
mov dword [rdi + 0x148], r12d
mov rax, qword [rdi + 0x18]
mov rcx, qword [rax + 0x3e0]
mov eax, dword [rcx + 0x8c]
test al, 3
je 0x140083bed
movzx eax, byte [rdx]
mov rbx, rdx
test al, al
je 0x140083a6c
cmp al, 0x20
je 0x140083a61
cmp byte [rbx], 9
jne 0x140083a6c
movzx eax, byte [rbx + 1]
inc rbx
test al, al
jne 0x140083a58
mov r8d, 5
lea rdx, str.HTTP_
mov rcx, rbx
call fcn.14003f0d0
test eax, eax
jne 0x140083b25
movsx edx, byte [rbx + 5]
mov ecx, edx
sub ecx, 0x31
je 0x140083b55
sub ecx, r15d
je 0x140083ab9
cmp ecx, r15d
je 0x140083ab9
lea rdx, str.Unsupported_HTTP_version_in_response
mov rcx, rdi
call fcn.14006f870
mov eax, r15d
jmp 0x140083fbd
movzx eax, byte [rbx + 6]
cmp al, 0x20
je 0x140083ac5
cmp al, 9
jne 0x140083b25
lea eax, [rdx - 0x30]
lea ecx, [rax + rax*4]
add ecx, ecx
mov dword [rdi + 0x148], ecx
movsx ecx, byte [rbx + 7]
lea eax, [rcx - 0x30]
cmp al, 9
ja 0x140083b25
movsx edx, byte [rbx + 8]
lea eax, [rdx - 0x30]
cmp al, 9
ja 0x140083b25
movsx r8d, byte [rbx + 9]
lea eax, [r8 - 0x30]
cmp al, 9
ja 0x140083b25
lea ecx, [rcx + rcx*4]
lea ecx, [rdx + rcx*2]
lea ecx, [rcx + rcx*4]
lea ecx, [rcx - 0xa68]
lea ecx, [r8 + rcx*2]
mov dword [rdi + 0x14c], ecx
movzx eax, byte [rbx + 0xa]
cmp al, 0x20
je 0x140083cd0
sub al, 9
cmp al, 4
jbe 0x140083cd0
mov r8, rbp
mov rdx, rsi
mov rcx, rdi
call fcn.140082b80
cmp eax, r15d
jne 0x140083e7a
mov dword [rdi + 0x14c], 0xc8
mov dword [rdi + 0x148], 0xa
jmp 0x140083cd0
cmp byte [rbx + 6], 0x2e
jne 0x140083bd6
movsx ecx, byte [rbx + 7]
lea eax, [rcx - 0x30]
cmp al, r15b
ja 0x140083bd6
movzx eax, byte [rbx + 8]
cmp al, 0x20
je 0x140083b73
cmp al, 9
jne 0x140083bd6
lea eax, [rcx - 0x26]
mov dword [rdi + 0x148], eax
movsx ecx, byte [rbx + 9]
lea eax, [rcx - 0x30]
cmp al, 9
ja 0x140083bd6
movsx edx, byte [rbx + 0xa]
lea eax, [rdx - 0x30]
cmp al, 9
ja 0x140083bd6
movsx r8d, byte [rbx + 0xb]
lea eax, [r8 - 0x30]
cmp al, 9
ja 0x140083bd6
lea ecx, [rcx + rcx*4]
lea ecx, [rdx + rcx*2]
lea ecx, [rcx + rcx*4]
lea ecx, [rcx - 0xa68]
lea ecx, [r8 + rcx*2]
mov dword [rdi + 0x14c], ecx
movzx eax, byte [rbx + 0xc]
cmp al, 0x20
je 0x140083cd0
cmp al, 9
je 0x140083cd0
sub al, 0xa
cmp al, 3
jbe 0x140083cd0
lea rdx, str.Unsupported_HTTP_1_subversion_in_response
mov rcx, rdi
call fcn.14006f870
mov eax, r15d
jmp 0x140083fbd
bt eax, 0x12
jae 0x140083e7a
movzx eax, byte [rdx]
mov rbx, rsi
test al, al
je 0x140083c15
cmp al, 0x20
je 0x140083c0a
cmp byte [rbx], 9
jne 0x140083c15
movzx eax, byte [rbx + 1]
inc rbx
test al, al
jne 0x140083c01
mov r8d, 5
lea rdx, str.RTSP_
mov rcx, rbx
call fcn.14003f0d0
test eax, eax
jne 0x140083e7a
movzx eax, byte [rbx + 5]
sub al, 0x30
cmp al, 9
ja 0x140083e81
cmp byte [rbx + 6], 0x2e
jne 0x140083e81
movzx eax, byte [rbx + 7]
sub al, 0x30
cmp al, 9
ja 0x140083e81
movzx eax, byte [rbx + 8]
cmp al, 0x20
je 0x140083c68
cmp al, 9
jne 0x140083e81
movsx ecx, byte [rbx + 9]
lea eax, [rcx - 0x30]
cmp al, 9
ja 0x140083e81
movsx edx, byte [rbx + 0xa]
lea eax, [rdx - 0x30]
cmp al, 9
ja 0x140083e81
movsx r8d, byte [rbx + 0xb]
lea eax, [r8 - 0x30]
cmp al, 9
ja 0x140083e81
lea ecx, [rcx + rcx*4]
lea ecx, [rdx + rcx*2]
lea ecx, [rcx + rcx*4]
lea ecx, [rcx - 0xa68]
lea ecx, [r8 + rcx*2]
mov dword [rdi + 0x14c], ecx
movzx eax, byte [rbx + 0xc]
cmp al, 0x20
je 0x140083cc6
cmp al, 9
je 0x140083cc6
sub al, 0xa
cmp al, 3
ja 0x140083e81
mov dword [rdi + 0x148], recvfrom
mov r9d, dword [rdi + 0x148]
mov ecx, r9d
mov rbx, qword [rdi + 0x18]
sub ecx, 0xa
je 0x140083d20
cmp ecx, r15d
je 0x140083d20
mov eax, 0x66666667
mov rcx, rdi
imul r9d
mov r8d, edx
lea rdx, str.Unsupported_HTTP_version___u._d__in_response
sar r8d, 2
mov eax, r8d
shr eax, 0x1f
add r8d, eax
lea eax, [r8 + r8*4]
add eax, eax
sub r9d, eax
call fcn.14006f870
mov eax, r15d
jmp 0x140083fbd
movzx eax, byte [rbx + 0x7e0]
test al, al
je 0x140083d6f
mov ecx, eax
mov eax, 0xcccccccd
mul ecx
mov eax, 0x66666667
mov r8d, edx
imul r9d
shr r8d, 3
mov r9d, edx
sar r9d, 2
mov eax, r9d
shr eax, 0x1f
add r9d, eax
cmp r9d, r8d
je 0x140083d6f
lea rdx, str.Version_mismatch__from_HTTP__u_to_HTTP__u_
mov rcx, rdi
call fcn.14006f870
mov eax, r15d
jmp 0x140083fbd
mov eax, dword [rdi + 0x14c]
mov dword [rdi + 0x1338], eax
mov eax, dword [rdi + 0x148]
mov dword [rdi + 0x1340], eax
movzx eax, byte [rdi + 0x148]
mov byte [rbx + 0x7e0], al
movzx eax, byte [rdi + 0x1319]
test al, al
je 0x140083da7
cmp eax, dword [rdi + 0x148]
jle 0x140083db4
movzx eax, byte [rdi + 0x148]
mov byte [rdi + 0x1319], al
cmp qword [rdi + 0x1120], r12
je 0x140083dd9
cmp byte [rdi + 0x131a], r12b
jne 0x140083dd9
cmp dword [rdi + 0x14c], 0x1a0
jne 0x140083dd9
mov byte [rdi + 0x1e3], r15b
cmp dword [rdi + 0x148], 0xa
jne 0x140083dfc
lea rdx, str.HTTP_1.0__assume_close_after_body
mov rcx, rdi
call fcn.14006f960
mov edx, r15d
mov rcx, rbx
call fcn.140072750
mov ecx, dword [rdi + 0x14c]
lea eax, [rcx - 0x64]
cmp eax, 0x63
setbe al
mov byte [rdi + 0x1e4], al
sub ecx, 0xcc
je 0x140083e2e
cmp ecx, 0x64
jne 0x140083e43
cmp byte [rdi + 0x538], r12b
je 0x140083e2e
mov byte [rdi + 0x1414], r15b
mov qword [rdi + 0x100], r12
mov qword [rdi + 0x108], r12
mov byte [rdi + 0x1e4], r15b
mov ebx, listen
lea r14, [rdi + 0x13c]
mov r8, rbp
xor edx, edx
mov rcx, rsi
call fcn.1400c0540
test rax, rax
je 0x140083e8b
lea rdx, str.Nul_byte_in_header
mov rcx, rdi
mov ebx, 8
call fcn.14006f870
jmp 0x140083fbb
mov byte [rdi + 0x1d9], r12b
mov eax, 8
jmp 0x140083fbd
mov ecx, dword [r14]
cmp ecx, 2
jl 0x140083ed1
movzx eax, byte [rsi]
cmp al, 0x20
je 0x140083e9e
cmp al, 9
jne 0x140083ea3
cmp ecx, 2
jg 0x140083ed1
mov r8, rbp
mov edx, 0x3a
mov rcx, rsi
call fcn.1400c0540
test rax, rax
jne 0x140083ed1
lea rdx, str.Header_without_colon
mov rcx, rdi
mov ebx, 8
call fcn.14006f870
jmp 0x140083fbb
mov r8, rbp
mov rdx, rsi
mov rcx, rdi
call fcn.140080f90
test eax, eax
jne 0x140083fbd
mov r9, rbp
mov r8, rsi
mov edx, r15d
mov rcx, rdi
call fcn.14006f780
mov eax, dword [rdi + 0x14c]
sub eax, 0x64
cmp eax, 0x64
jae 0x140083f09
or ebx, 0x20
mov r9, rbp
mov r8, rsi
mov edx, ebx
mov rcx, rdi
call fcn.140070d80
test eax, eax
jne 0x140083fbd
xor r8d, r8d
mov rdx, rbp
mov rcx, rdi
call fcn.140080490
jmp 0x140083fbd
lea rdx, [r8 + 1]
lea rcx, [rsp + 0x30]
call fcn.14005fac0
mov r8, rbp
lea rcx, [rsp + 0x30]
mov rdx, rsi
call fcn.14005fa80
test eax, eax
jne 0x140083fbd
lea rcx, [rdi + 0xc58]
call fcn.14005fb00
lea rcx, [rsp + 0x30]
call fcn.14005fae0
lea rcx, [rsp + 0x30]
mov rbx, rax
call fcn.14005faf0
mov rcx, qword [rsp + 0x90]
mov rdx, rax
lea rax, [rsp + 0x98]
mov r9, r15
mov qword [rsp + 0x28], rax
mov r8, rbx
mov qword [rsp + 0x20], rcx
mov rcx, rdi
call fcn.140082cc0
mov rcx, qword [rsp + 0x98]
mov ebx, eax
add qword [r14], rcx
lea rcx, [rsp + 0x30]
call fcn.14005fa90
mov eax, ebx
lea r11, [rsp + 0x50]
mov rbx, qword [r11 + 0x20]
mov rbp, qword [r11 + 0x28]
mov rsi, qword [r11 + 0x30]
mov rdi, qword [r11 + 0x38]
mov rsp, r11
pop r15
pop r14
pop r12
ret