initial - an echo server for now
(prints back the first 2kB of the request as text/plain)master
Tomek Dubrownik
commit
3c08cc1c21
|
|
@ -0,0 +1,8 @@
|
|||
asmttp: asmttp.o
|
||||
ld asmttp.o -o asmttp
|
||||
asmttp.o: asmttp.asm definitions.inc
|
||||
nasm -f elf64 -o asmttp.o asmttp.asm
|
||||
definitions.inc: define.e
|
||||
./define.e > definitions.inc
|
||||
define.e: define.c
|
||||
gcc -o define.e define.c
|
||||
|
|
@ -0,0 +1,209 @@
|
|||
[BITS 64]
|
||||
%include "definitions.inc"
|
||||
%define sysread 0
|
||||
%define syswrite 1
|
||||
%define sysclose 3
|
||||
%define sysmmap 9
|
||||
%define sysmunmap 11
|
||||
%define sysrtsigaction 13
|
||||
%define syssocket 41
|
||||
%define sysaccept 43
|
||||
%define sysbind 49
|
||||
%define syslisten 50
|
||||
%define syssetsockopt 54
|
||||
%define sysclone 56
|
||||
%define sysexit 60
|
||||
|
||||
%define backlog 100
|
||||
%define childsize 2048
|
||||
|
||||
global _start
|
||||
section .data
|
||||
|
||||
reuse: dd 1
|
||||
reuselen: equ $ - reuse
|
||||
|
||||
sockaddr:
|
||||
sin_family dw AF_INET
|
||||
sin_port db 1fh, 40h ; 8000
|
||||
sin_addr db 0, 0, 0, 0
|
||||
addrlen equ 16
|
||||
|
||||
status: db "HTTP/1.0 200 OK",13,10
|
||||
db "Content-Type: text/plain",13,10
|
||||
db 13,10
|
||||
|
||||
|
||||
;; db "GIF89a"
|
||||
;; dw 8 ; width (LE)
|
||||
;; dw 8 ; heigh
|
||||
;; db 10000000b ;
|
||||
;; db 0 ; bg color
|
||||
;; db 0 ; pixel aspect
|
||||
;; ;; global color table
|
||||
;; db 0,0,0
|
||||
;; db 0xff, 0xff, 0xff
|
||||
;; ;; image descriptor
|
||||
;; db 0x2c ; image separator
|
||||
;; dw 0 ; image left
|
||||
;; dw 0 ; image top
|
||||
;; dw 8 ; width
|
||||
;; dw 8 ; height
|
||||
;; db 0 ; packed
|
||||
;; ;; table
|
||||
;; db 13
|
||||
;; db 4
|
||||
|
||||
;; db 1
|
||||
;; db 10110000b
|
||||
;; db 00101010b
|
||||
;; db 10000000b
|
||||
;; db 0
|
||||
|
||||
|
||||
status_len: equ $ - status
|
||||
|
||||
pipeign:
|
||||
handler dd SIG_IGN
|
||||
mask dd 0
|
||||
|
||||
section .bss
|
||||
clientaddr:
|
||||
cl_family resw 1
|
||||
cl_port resw 1
|
||||
cl_addr resd 1
|
||||
pad resq 1
|
||||
cl_addrlen resd 1
|
||||
|
||||
section .text
|
||||
_start:
|
||||
mov rax, sysrtsigaction
|
||||
mov rdi, SIGPIPE
|
||||
mov rsi, pipeign
|
||||
mov rdx, 0
|
||||
mov r10, 8
|
||||
syscall
|
||||
|
||||
mov rax, syssocket
|
||||
mov rdi, AF_INET
|
||||
mov rsi, SOCK_STREAM
|
||||
xor rdx, rdx
|
||||
syscall
|
||||
test rax, rax
|
||||
js fail
|
||||
mov rdi, rax
|
||||
|
||||
mov rax, syssetsockopt
|
||||
mov rsi, SOL_SOCKET
|
||||
mov rdx, SO_REUSEADDR
|
||||
mov r10, reuse
|
||||
mov r8, reuselen
|
||||
syscall
|
||||
test rax, rax
|
||||
jnz fail
|
||||
|
||||
mov rax, sysbind
|
||||
mov rsi, sockaddr
|
||||
mov rdx, addrlen
|
||||
syscall
|
||||
test rax, rax
|
||||
jnz fail
|
||||
|
||||
mov rax, syslisten
|
||||
mov rsi, 10
|
||||
syscall
|
||||
test rax, rax
|
||||
jnz fail
|
||||
|
||||
mov r12, rdi
|
||||
|
||||
xor rsp, rsp
|
||||
accept:
|
||||
mov rax, sysaccept
|
||||
mov rsi, clientaddr
|
||||
mov rdx, cl_addrlen
|
||||
syscall
|
||||
test rax, rax
|
||||
js fail
|
||||
mov rsi, rax
|
||||
|
||||
clone:
|
||||
mov rax, sysclone
|
||||
mov rdi, 0x00013fff
|
||||
xor rdx, rdx
|
||||
syscall
|
||||
|
||||
test rax, rax
|
||||
js fail
|
||||
|
||||
test rsp, rsp
|
||||
jnz child
|
||||
|
||||
mov rdi, r12
|
||||
|
||||
jmp accept
|
||||
fail:
|
||||
mov rdi, rax
|
||||
jmp exit
|
||||
success:
|
||||
mov rdi, 0
|
||||
exit:
|
||||
mov rax, sysexit
|
||||
syscall
|
||||
|
||||
child:
|
||||
mov r12, rsp
|
||||
|
||||
mov rax, sysmmap
|
||||
mov rdi, 0
|
||||
mov rsi, childsize
|
||||
mov rdx, PROT_WRITE
|
||||
mov r10, MAP_ANONYMOUS
|
||||
or r10, MAP_PRIVATE
|
||||
mov r8, 0
|
||||
mov r9, 0
|
||||
syscall
|
||||
|
||||
test rax, MAP_FAILED
|
||||
je fail
|
||||
|
||||
mov rsp, rax
|
||||
mov rdi, r12
|
||||
|
||||
read2k:
|
||||
mov rax, sysread
|
||||
mov rsi, rsp
|
||||
mov rdx, childsize
|
||||
syscall
|
||||
test rax, rax
|
||||
js close
|
||||
|
||||
mov r12, rax
|
||||
write_head:
|
||||
mov rax, syswrite
|
||||
mov rsi, status
|
||||
mov rdx, status_len
|
||||
syscall
|
||||
|
||||
cmp rax, 0
|
||||
jl close
|
||||
|
||||
write_echo:
|
||||
mov rax, syswrite
|
||||
mov rsi, rsp
|
||||
mov rdx, r12
|
||||
syscall
|
||||
|
||||
jmp close
|
||||
write:
|
||||
mov rax, syswrite
|
||||
|
||||
close:
|
||||
mov rax, sysclose
|
||||
syscall
|
||||
mov rax, sysmunmap
|
||||
mov rdi, rsp
|
||||
mov rsi, childsize
|
||||
syscall
|
||||
|
||||
jmp success
|
||||
|
|
@ -0,0 +1,18 @@
|
|||
#include <stdio.h>
|
||||
#include <sys/socket.h>
|
||||
#include <sys/mman.h>
|
||||
#include <signal.h>
|
||||
#define DEFINE(sym) printf("%%define %s %d\n", #sym, sym)
|
||||
int main() {
|
||||
DEFINE(SOCK_STREAM);
|
||||
DEFINE(AF_INET);
|
||||
DEFINE(SOL_SOCKET);
|
||||
DEFINE(SO_REUSEADDR);
|
||||
DEFINE(SIGPIPE);
|
||||
DEFINE(SIG_IGN);
|
||||
DEFINE(MAP_ANONYMOUS);
|
||||
DEFINE(MAP_FAILED);
|
||||
DEFINE(MAP_PRIVATE);
|
||||
DEFINE(PROT_WRITE);
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -0,0 +1,16 @@
|
|||
#include <signal.h>
|
||||
#include <stdio.h>
|
||||
#include <netinet/ip.h>
|
||||
#define OFFSET(type, attr) printf("%s %d\n", #attr, &(((type*) 0)->attr))
|
||||
|
||||
int main() {
|
||||
OFFSET(struct sockaddr_in, sin_family);
|
||||
OFFSET(struct sockaddr_in, sin_port);
|
||||
OFFSET(struct sockaddr_in, sin_addr);
|
||||
printf("%d\n", sizeof(struct sockaddr_in));
|
||||
|
||||
OFFSET(struct sigaction, sa_handler);
|
||||
OFFSET(struct sigaction, sa_mask);
|
||||
OFFSET(struct sigaction, sa_flags);
|
||||
OFFSET(struct sigaction, sa_restorer);
|
||||
}
|
||||
Loading…
Reference in New Issue