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Byte wise comparison #60

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Byte wise comparison #60

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aacab6a
changed data.asm to contain a pointer array with the values HEAD and …
WookiesRpeople2 Oct 20, 2024
9312df7
changed req_types to req_get
WookiesRpeople2 Oct 20, 2024
39a9484
FIXED: segfault on head request
WookiesRpeople2 Oct 22, 2024
3ac36a1
Changed the way the requested is matched
WookiesRpeople2 Nov 8, 2024
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5 changes: 5 additions & 0 deletions data.asm
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Original file line number Diff line number Diff line change
Expand Up @@ -171,3 +171,8 @@
http_dir_entry_open_a_tag_pre db '<p><a href="',0x00
http_dir_entry_open_a_tag_post db '">',0x00
http_dir_entry_close_a_tag db '</a></p>',0x00

; Request type
request_types db "GET ", "HEAD " ; space after each request type
request_values db REQ_GET, REQ_HEAD
num_requests equ ($ - request_types) / 4
36 changes: 15 additions & 21 deletions http.asm
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Original file line number Diff line number Diff line change
Expand Up @@ -410,28 +410,22 @@ get_request_type: ;rdi - pointer to buffer, ret = rax: request type
mov rax, r10
add rax, 0x03
mov [request_offset], rax

mov rax, REQ_UNK

check_get:
cmp byte[rdi+0], 0x47
jne check_head
cmp byte[rdi+1], 0x45
jne check_head
cmp byte[rdi+2], 0x54
jne check_head
mov rax, REQ_GET

check_head:
cmp byte[rdi+0], 0x48
jne request_type_return
cmp byte[rdi+1], 0x45
jne request_type_return
cmp byte[rdi+2], 0x41
jne request_type_return
cmp byte[rdi+3], 0x44
jne request_type_return
mov rax, REQ_HEAD

check_request_loop:
mov edx, [rdi]
lea rsi, [request_types + rbx * 4]
cmp edx, [rsi]
jne next_request

movzx rax, byte [request_values + rbx]
jmp request_type_return

next_request:
inc rbx
cmp rbx, num_requests
jl check_request_loop

request_type_return:
stackpop
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