diff options
| -rw-r--r-- | lace_x86.asm | 63 | ||||
| -rw-r--r-- | sockaddr_127-0-0-1_1337.bin | bin | 16 -> 0 bytes |
2 files changed, 19 insertions, 44 deletions
diff --git a/lace_x86.asm b/lace_x86.asm index 12fc1b0..77e8ce9 100644 --- a/lace_x86.asm +++ b/lace_x86.asm @@ -1,5 +1,8 @@ BITS 32 +%define PORT 0x3905 ; TCP port 1337 +%define ADDRESS 0x0100007f ; 127.0.0.1 + org 0x00010000 ; Memory load location ; ELF HEADER CONTENT PROGRAM HEADER TBL ENTRY CONTENT @@ -24,14 +27,11 @@ BITS 32 db 0x00 ; | | db 0x00 ; | | db 0x00 ; | | - db 0x00 ; shoff: 0 (File offset)** align: 0 (No alignment constraints) - db 0x00 ; | | +sockaddr: + db 0x02 ; shoff: ??? (File offset)** align: ??? db 0x00 ; | | - db 0x00 ; | | - db 0x00 ; flags: 0 - db 0x00 ; | - db 0x00 ; | - db 0x00 ; | + dw PORT ; | | + dd ADDRESS ; flags: ??? db 0x34 ; ehsize: 52 db 0x00 ; | db 0x20 ; phentsize: 32 @@ -69,76 +69,51 @@ BITS 32 ; larger than that of the actual output file is of no consequence. _start: - xor edx, edx ; open(argv[1], 0, 0) - xor ecx, ecx - mov ebx, [esp+8] - xor eax, eax - mov al, 5 - int 0x80 - - cmp eax, 0 ; if fail, exit(1) - mov bl, 1 - jl exit - - mov dl, 16 ; read(argv[1], sockaddr, sizeof(sockaddr)) - mov ecx, esp - mov ebx, eax - mov al, 3 - int 0x80 - - cmp eax, 16 ; if fail, exit(2) - mov bl, 2 - jne exit - - push 0 ; socket(AF_INET, SOCK_STREAM, 0) + push 0 ; socket(AF_INET, SOCK_STREAM, 0) push 1 push 2 mov ecx, esp - mov bl, 1 + mov bl, 0x01 mov al, 0x66 int 0x80 - push 16 ; connect(sock, sockaddr, sizeof(sockaddr)) - lea ecx, [esp+16] + push 16 ; connect(fd, sockaddr, sizeof(sockaddr)) + lea ecx, sockaddr push ecx push eax mov ecx, esp - mov bl, 3 + mov bl, 0x03 mov al, 0x66 int 0x80 - cmp eax, 0 ; if fail, exit(3) - mov bl, 3 - jne exit - - xor esi, esi ; pipe(sock_fd, stdin) + xor esi, esi ; pipe(sock_fd, stdin) pop edi call pipe - inc esi ; pipe(stdout, sock_fd) + inc esi ; pipe(stdout, sock_fd) xchg edi, esi call pipe - xor ebx, ebx ; exit(0) + xor ebx, ebx ; exit(0) jmp exit pipe: - mov dl, 0xff ; read(src, buff, sizeof(buff)) + mov dl, 0xff ; read(src, buff, sizeof(buff)) lea ecx, [esp+4] mov ebx, esi mov al, 3 int 0x80 - cmp eax, 0 ; if finished/error, return + cmp eax, 0 ; if finished/error, return jg pipe_cont ret pipe_cont: - mov edx, eax ; write(dst, buff, nb) + mov edx, eax ; write(dst, buff, nb) mov ebx, edi mov al, 4 int 0x80 - jmp pipe ; loop + jmp pipe ; loop exit: xor eax, eax diff --git a/sockaddr_127-0-0-1_1337.bin b/sockaddr_127-0-0-1_1337.bin Binary files differdeleted file mode 100644 index 8078d06..0000000 --- a/sockaddr_127-0-0-1_1337.bin +++ /dev/null |