Function ql_syscall_getpeername

qiling/os/posix/syscall/socket.py:514–573

(ql: Qiling, sockfd: int, addr: int, addrlenptr: int)

def ql_syscall_getpeername(ql: Qiling, sockfd: int, addr: int, addrlenptr: int):
    sock = get_opened_socket(ql.os, sockfd)

    if isinstance(sock, int):
        return sock

    addrlen = ql.mem.read_ptr(addrlenptr) if addrlenptr else 0

    abits = ql.arch.bits
    endian = ql.arch.endian

    peername = sock.getpeername()
    obj = None

    if sock.family == AF_UNIX:
        hpath = peername
        vpath = ql.os.path.host_to_virtual_path(hpath)

        if addrlen:
            # addrlen indicates the total obj size allowed to be written.
            # that already includes the family field (2) and the path null
            # terminator (1)
            vpath = vpath[:addrlen - 2 - 1]

        sockaddr_un = make_sockaddr_un(abits, endian, len(vpath) + 1)

        obj = sockaddr_un()
        obj.sun_family = AF_UNIX
        obj.sun_path = vpath.encode() + b'\x00'

    elif sock.family == AF_INET:
        sockaddr_in = make_sockaddr_in(abits, endian)
        host, port = peername

        obj = sockaddr_in()
        obj.sin_family = AF_INET
        obj.sin_port = htons(ql, port)
        obj.sin_addr.s_addr = inet_aton(str(host))

    elif sock.family == AF_INET6 and ql.os.ipv6:
        sockaddr_in6 = make_sockaddr_in6(abits, endian)
        host, port = peername

        obj = sockaddr_in6()
        obj.sin6_family = AF_INET6
        obj.sin6_port = htons(ql, port)
        obj.sin6_addr.s6_addr = inet6_aton(str(host))

    if obj:
        objsize = obj.sizeof()

        if objsize <= addrlen:
            obj.save_to(ql.mem, addr)

        if addrlenptr:
            ql.mem.write_ptr(addrlenptr, objsize)

    ql.log.debug("getpeername(%d, %#x, %#x) = %d" % (sockfd, addr, addrlenptr, 0))