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Echo server: Difference between revisions
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socket -server acceptEcho -myaddr localhost 12321
vwait forever</lang>
=={{header|X86 Assembly}}==
<lang x86asm>
global _start
%define af_inet 2
%define sock_stream 1
%define default_proto 0
%define sol_sock 1
%define reuse_addr 2
%define reuse_port 15
%define server_port 9001
%define addr_any 0
%define family_offset 0
%define port_offset 2
%define addr_offset 4
%define unused_offset 8
%define addr_len 16
%define buffer_len 64
%define max_connections 3
section .text
; rdi - 16 bit value to be byte swapped
; return - byte swapped value
htn_swap16:
xor rax, rax
mov rdx, 0x000000ff
mov rsi, rdi
and rsi, rdx
shl rsi, 8
or rax, rsi
shl rdx, 8
mov rsi, rdi
and rsi, rdx
shr rsi, 8
or rax, rsi
ret
; return - server socket
create_server_socket:
mov rax, 41
mov rdi, af_inet
mov rsi, sock_stream
mov rdx, default_proto
syscall
push rax
mov rax, 54
mov rdi, qword [rsp]
mov rsi, sol_sock
mov rdx, reuse_addr
mov qword [rsp - 16], 1
lea r10, [rsp - 16]
mov r8, 4
syscall
mov rax, 54
mov rdi, qword [rsp]
mov rsi, sol_sock
mov rdx, reuse_port
mov qword [rsp - 16], 1
lea r10, [rsp - 16]
mov r8, 4
syscall
pop rax
ret
; rdi - socket
; rsi - port
; rdx - connections
; return - void
bind_and_listen:
push rdi
push rdx
mov rdi, rsi
call htn_swap16
lea rsi, [rsp - 16]
mov word [rsi + family_offset], af_inet
mov word [rsi + port_offset], ax
mov dword [rsi + addr_offset], addr_any
mov qword [rsi + unused_offset], 0
mov rax, 49
mov rdi, qword [rsp + 8]
mov rdx, addr_len
syscall
mov rax, 50
pop rsi
pop rdi
syscall
ret
; rdi - server socket
; return - client socket
accept:
mov rax, 43
lea rsi, [rsp - 16]
lea rdx, [rsp - 24]
syscall
ret
; rdi - client socket
; return - void
echo:
push rdi
mov rax, 0
lea rsi, [rsp - 104]
mov rdx, buffer_len
syscall
pop rdi
mov rdx, rax
lea rsi, [rsp - 112]
mov rax, 1
syscall
ret
_start:
call create_server_socket
mov r14, rax
mov rdi, rax
mov rsi, server_port
mov rdx, max_connections
call bind_and_listen
accept_connection:
mov rdi, r14
call accept
mov r15, rax
mov rax, 57
syscall
test rax, rax
jz handle_connection
; close client socket
mov rax, 3
mov rdi, r15
syscall
jmp accept_connection
handle_connection:
mov rdi, r15
call echo
close_client:
mov rax, 3
mov rdi, r15
syscall
close_server:
mov rax, 3
mov rdi, r14
syscall
exit:
mov rax, 60
xor rdi, rdi
syscall
</lang>
=={{header|zkl}}==
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