module net import time pub struct TcpConn { pub: sock TcpSocket mut: write_deadline time.Time read_deadline time.Time read_timeout time.Duration write_timeout time.Duration } pub fn dial_tcp(address string) ?TcpConn { s := new_tcp_socket()? s.connect(address)? return TcpConn { sock: s read_timeout: -1 write_timeout: -1 } } pub fn (c TcpConn) close() ? { c.sock.close()? return none } // write_ptr blocks and attempts to write all data pub fn (c TcpConn) write_ptr(b byteptr, len int) ? { unsafe { mut ptr_base := byteptr(b) mut total_sent := 0 for total_sent < len { ptr := ptr_base + total_sent remaining := len - total_sent mut sent := C.send(c.sock.handle, ptr, remaining, msg_nosignal) if sent < 0 { code := error_code() match code { error_ewouldblock { c.wait_for_write() continue } else { wrap_error(code)? } } } total_sent += sent } } return none } // write blocks and attempts to write all data pub fn (c TcpConn) write(bytes []byte) ? { return c.write_ptr(bytes.data, bytes.len) } // write_string blocks and attempts to write all data pub fn (c TcpConn) write_string(s string) ? { return c.write_ptr(s.str, s.len) } pub fn (c TcpConn) read_into_ptr(buf_ptr byteptr, len int) ?int { res := C.recv(c.sock.handle, buf_ptr, len, 0) if res >= 0 { return res } code := error_code() match code { error_ewouldblock { c.wait_for_read()? return socket_error(C.recv(c.sock.handle, buf_ptr, len, 0)) } else { wrap_error(code)? } } } pub fn (c TcpConn) read_into(mut buf []byte) ?int { res := C.recv(c.sock.handle, buf.data, buf.len, 0) if res >= 0 { return res } code := error_code() match code { error_ewouldblock { c.wait_for_read()? return socket_error(C.recv(c.sock.handle, buf.data, buf.len, 0)) } else { wrap_error(code)? } } } pub fn (c TcpConn) read() ?[]byte { buf := []byte { len: 1024 } read := c.read_into(buf)? return buf[..read] } pub fn (c TcpConn) read_deadline() ?time.Time { if c.read_deadline.unix == 0 { return c.read_deadline } return none } pub fn (mut c TcpConn) set_read_deadline(deadline time.Time) { c.read_deadline = deadline } pub fn (c TcpConn) write_deadline() ?time.Time { if c.write_deadline.unix == 0 { return c.write_deadline } return none } pub fn (mut c TcpConn) set_write_deadline(deadline time.Time) { c.write_deadline = deadline } pub fn (c TcpConn) read_timeout() time.Duration { return c.read_timeout } pub fn(mut c TcpConn) set_read_timeout(t time.Duration) { c.read_timeout = t } pub fn (c TcpConn) write_timeout() time.Duration { return c.write_timeout } pub fn (mut c TcpConn) set_write_timeout(t time.Duration) { c.write_timeout = t } [inline] pub fn (c TcpConn) wait_for_read() ? { return wait_for_read(c.sock.handle, c.read_deadline, c.read_timeout) } [inline] pub fn (c TcpConn) wait_for_write() ? { return wait_for_write(c.sock.handle, c.write_deadline, c.write_timeout) } pub fn (c TcpConn) str() string { // TODO return 'TcpConn' } pub struct TcpListener { sock TcpSocket mut: accept_timeout time.Duration accept_deadline time.Time } pub fn listen_tcp(port int) ?TcpListener { s := new_tcp_socket()? validate_port(port)? mut addr := C.sockaddr_in{} addr.sin_family = SocketFamily.inet addr.sin_port = C.htons(port) addr.sin_addr.s_addr = C.htonl(C.INADDR_ANY) size := sizeof(C.sockaddr_in) // cast to the correct type sockaddr := &C.sockaddr(&addr) socket_error(C.bind(s.handle, sockaddr, size))? socket_error(C.listen(s.handle, 128))? return TcpListener { sock: s accept_timeout: -1 accept_deadline: no_deadline } } pub fn (l TcpListener) accept() ?TcpConn { addr := C.sockaddr_storage{} unsafe { C.memset(&addr, 0, sizeof(C.sockaddr_storage)) } size := sizeof(C.sockaddr_storage) // cast to correct type sock_addr := &C.sockaddr(&addr) mut new_handle := C.accept(l.sock.handle, sock_addr, &size) if new_handle <= 0 { l.wait_for_accept()? new_handle = C.accept(l.sock.handle, sock_addr, &size) if new_handle == -1 || new_handle == 0 { return none } } new_sock := TcpSocket { handle: new_handle } return TcpConn{ sock: new_sock read_timeout: -1 write_timeout: -1 } } pub fn (c TcpListener) accept_deadline() ?time.Time { if c.accept_deadline.unix != 0 { return c.accept_deadline } return none } pub fn (mut c TcpListener) set_accept_deadline(deadline time.Time) { c.accept_deadline = deadline } pub fn (c TcpListener) accept_timeout() time.Duration { return c.accept_timeout } pub fn(mut c TcpListener) set_accept_timeout(t time.Duration) { c.accept_timeout = t } pub fn (c TcpListener) wait_for_accept() ? { return wait_for_read(c.sock.handle, c.accept_deadline, c.accept_timeout) } pub fn (c TcpListener) close() ? { c.sock.close()? return none } pub fn (c TcpListener) address() ?Addr { return c.sock.address() } struct TcpSocket { pub: handle int } fn new_tcp_socket() ?TcpSocket { sockfd := socket_error(C.socket(SocketFamily.inet, SocketType.tcp, 0))? s := TcpSocket { handle: sockfd } s.set_option_bool(.reuse_addr, true)? $if windows { t := true socket_error(C.ioctlsocket(sockfd, fionbio, &t))? } $else { socket_error(C.fcntl(sockfd, C.F_SETFD, C.O_NONBLOCK)) } return s } pub fn (s TcpSocket) set_option_bool(opt SocketOption, value bool) ? { // TODO reenable when this `in` operation works again // if opt !in opts_can_set { // return err_option_not_settable // } // if opt !in opts_bool { // return err_option_wrong_type // } socket_error(C.setsockopt(s.handle, C.SOL_SOCKET, int(opt), &value, sizeof(bool)))? return none } pub fn (s TcpSocket) set_option_int(opt SocketOption, value int) ? { socket_error(C.setsockopt(s.handle, C.SOL_SOCKET, int(opt), &value, sizeof(int)))? return none } fn (s TcpSocket) close() ? { return shutdown(s.handle) } fn (s TcpSocket) @select(test Select, timeout time.Duration) ?bool { return @select(s.handle, test, timeout) } const ( connect_timeout = 5 * time.second ) fn (s TcpSocket) connect(a string) ? { addr := resolve_addr(a, .inet, .tcp)? res := C.connect(s.handle, &addr.addr, addr.len) if res == 0 { return none } errcode := error_code() if errcode == error_ewouldblock { write_result := s.@select(.write, connect_timeout)? if write_result { // succeeded return none } except_result := s.@select(.except, connect_timeout)? if except_result { return err_connect_failed } // otherwise we timed out return err_connect_timed_out } return wrap_error(errcode) } // address gets the address of a socket pub fn (s TcpSocket) address() ?Addr { mut addr := C.sockaddr_in{} size := sizeof(C.sockaddr_in) // cast to the correct type sockaddr := &C.sockaddr(&addr) C.getsockname(s.handle, sockaddr, &size) return new_addr(sockaddr, '', 0) }