2020-08-21 00:01:37 +03:00
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module net
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import time
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2020-12-15 19:31:39 +03:00
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const (
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udp_default_read_timeout = 30 * time.second
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udp_default_write_timeout = 30 * time.second
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)
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2020-08-21 00:01:37 +03:00
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pub struct UdpConn {
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2021-01-20 13:11:01 +03:00
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pub mut:
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sock UdpSocket
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2020-08-21 00:01:37 +03:00
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mut:
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write_deadline time.Time
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2021-01-08 19:41:52 +03:00
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read_deadline time.Time
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read_timeout time.Duration
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write_timeout time.Duration
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2020-08-21 00:01:37 +03:00
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}
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2021-01-20 13:11:01 +03:00
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pub fn dial_udp(laddr string, raddr string) ?&UdpConn {
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2020-08-21 00:01:37 +03:00
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// Dont have to do this when its fixed
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// this just allows us to store this `none` optional in a struct
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2021-01-08 19:41:52 +03:00
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resolve_wrapper := fn (raddr string) ?Addr {
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x := resolve_addr(raddr, .inet, .udp) or { return none }
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2020-08-21 00:01:37 +03:00
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return x
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}
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2021-01-08 19:41:52 +03:00
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local := resolve_addr(laddr, .inet, .udp) ?
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sbase := new_udp_socket(local.port) ?
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sock := UdpSocket{
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2020-08-21 00:01:37 +03:00
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handle: sbase.handle
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l: local
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r: resolve_wrapper(raddr)
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}
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2021-01-20 13:11:01 +03:00
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return &UdpConn{
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2020-08-31 23:17:59 +03:00
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sock: sock
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2021-01-26 17:43:10 +03:00
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read_timeout: net.udp_default_read_timeout
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write_timeout: net.udp_default_write_timeout
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2020-08-21 00:01:37 +03:00
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}
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}
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2021-01-20 13:11:01 +03:00
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pub fn (mut c UdpConn) write_ptr(b byteptr, len int) ? {
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2021-01-08 19:41:52 +03:00
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remote := c.sock.remote() or { return err_no_udp_remote }
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2020-08-21 00:01:37 +03:00
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return c.write_to_ptr(remote, b, len)
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}
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2021-01-20 13:11:01 +03:00
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pub fn (mut c UdpConn) write(buf []byte) ? {
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2020-08-21 00:01:37 +03:00
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return c.write_ptr(buf.data, buf.len)
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}
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2021-01-20 13:11:01 +03:00
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pub fn (mut c UdpConn) write_str(s string) ? {
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2020-08-21 00:01:37 +03:00
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return c.write_ptr(s.str, s.len)
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}
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2021-01-20 13:11:01 +03:00
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pub fn (mut c UdpConn) write_to_ptr(addr Addr, b byteptr, len int) ? {
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2020-08-21 00:01:37 +03:00
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res := C.sendto(c.sock.handle, b, len, 0, &addr.addr, addr.len)
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if res >= 0 {
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return none
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}
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code := error_code()
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2021-01-08 19:41:52 +03:00
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if code == int(error_ewouldblock) {
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c.wait_for_write() ?
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socket_error(C.sendto(c.sock.handle, b, len, 0, &addr.addr, addr.len)) ?
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} else {
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wrap_error(code) ?
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2020-08-21 00:01:37 +03:00
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}
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return none
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}
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// write_to blocks and writes the buf to the remote addr specified
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2021-01-20 13:11:01 +03:00
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pub fn (mut c UdpConn) write_to(addr Addr, buf []byte) ? {
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2020-08-21 00:01:37 +03:00
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return c.write_to_ptr(addr, buf.data, buf.len)
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}
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// write_to_string blocks and writes the buf to the remote addr specified
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2021-01-20 13:11:01 +03:00
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pub fn (mut c UdpConn) write_to_string(addr Addr, s string) ? {
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2020-08-21 00:01:37 +03:00
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return c.write_to_ptr(addr, s.str, s.len)
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}
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2020-11-15 23:54:47 +03:00
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// read reads from the socket into buf up to buf.len returning the number of bytes read
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2021-01-20 13:11:01 +03:00
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pub fn (mut c UdpConn) read(mut buf []byte) ?(int, Addr) {
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2020-08-21 00:01:37 +03:00
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mut addr_from := C.sockaddr{}
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len := sizeof(C.sockaddr)
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2021-01-08 19:41:52 +03:00
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mut res := wrap_read_result(C.recvfrom(c.sock.handle, buf.data, buf.len, 0, &addr_from,
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&len)) ?
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2020-11-15 23:54:47 +03:00
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if res > 0 {
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2021-01-08 19:41:52 +03:00
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addr := new_addr(addr_from) ?
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2020-08-21 00:01:37 +03:00
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return res, addr
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}
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code := error_code()
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2021-01-08 19:41:52 +03:00
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if code == int(error_ewouldblock) {
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c.wait_for_read() ?
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// same setup as in tcp
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res = wrap_read_result(C.recvfrom(c.sock.handle, buf.data, buf.len, 0, &addr_from,
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&len)) ?
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res2 := socket_error(res) ?
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addr := new_addr(addr_from) ?
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return res2, addr
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} else {
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wrap_error(code) ?
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2020-08-21 00:01:37 +03:00
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}
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return none
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}
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2021-01-20 13:11:01 +03:00
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pub fn (c &UdpConn) read_deadline() ?time.Time {
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2020-08-21 00:01:37 +03:00
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if c.read_deadline.unix == 0 {
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return c.read_deadline
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}
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return none
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}
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pub fn (mut c UdpConn) set_read_deadline(deadline time.Time) {
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c.read_deadline = deadline
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}
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2021-01-20 13:11:01 +03:00
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pub fn (c &UdpConn) write_deadline() ?time.Time {
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2020-08-21 00:01:37 +03:00
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if c.write_deadline.unix == 0 {
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return c.write_deadline
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}
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return none
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}
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pub fn (mut c UdpConn) set_write_deadline(deadline time.Time) {
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c.write_deadline = deadline
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}
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2021-01-20 13:11:01 +03:00
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pub fn (c &UdpConn) read_timeout() time.Duration {
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2020-08-21 00:01:37 +03:00
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return c.read_timeout
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}
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2021-01-08 19:41:52 +03:00
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pub fn (mut c UdpConn) set_read_timeout(t time.Duration) {
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2020-08-21 00:01:37 +03:00
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c.read_timeout = t
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}
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2021-01-20 13:11:01 +03:00
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pub fn (c &UdpConn) write_timeout() time.Duration {
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2020-08-21 00:01:37 +03:00
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return c.write_timeout
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}
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pub fn (mut c UdpConn) set_write_timeout(t time.Duration) {
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c.write_timeout = t
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}
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[inline]
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2021-01-20 13:11:01 +03:00
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pub fn (mut c UdpConn) wait_for_read() ? {
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2020-08-21 00:01:37 +03:00
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return wait_for_read(c.sock.handle, c.read_deadline, c.read_timeout)
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}
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[inline]
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pub fn (mut c UdpConn) wait_for_write() ? {
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2020-08-21 00:01:37 +03:00
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return wait_for_write(c.sock.handle, c.write_deadline, c.write_timeout)
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}
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2021-01-20 13:11:01 +03:00
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pub fn (c &UdpConn) str() string {
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2020-08-21 00:01:37 +03:00
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// TODO
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return 'UdpConn'
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}
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2021-01-20 13:11:01 +03:00
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pub fn (mut c UdpConn) close() ? {
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2020-08-21 00:01:37 +03:00
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return c.sock.close()
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}
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2021-01-20 13:11:01 +03:00
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pub fn listen_udp(port int) ?&UdpConn {
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2021-01-08 19:41:52 +03:00
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s := new_udp_socket(port) ?
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2021-01-20 13:11:01 +03:00
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return &UdpConn{
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2020-08-21 00:01:37 +03:00
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sock: s
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2021-01-26 17:43:10 +03:00
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read_timeout: net.udp_default_read_timeout
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write_timeout: net.udp_default_write_timeout
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2020-08-21 00:01:37 +03:00
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}
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}
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struct UdpSocket {
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handle int
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2021-01-08 19:41:52 +03:00
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l Addr
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r ?Addr
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2020-08-21 00:01:37 +03:00
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}
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2021-01-20 13:11:01 +03:00
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fn new_udp_socket(local_port int) ?&UdpSocket {
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2021-01-08 19:41:52 +03:00
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sockfd := socket_error(C.socket(SocketFamily.inet, SocketType.udp, 0)) ?
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2021-01-20 13:11:01 +03:00
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mut s := &UdpSocket{
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2020-08-21 00:01:37 +03:00
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handle: sockfd
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}
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2021-01-08 19:41:52 +03:00
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s.set_option_bool(.reuse_addr, true) ?
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2020-08-21 00:01:37 +03:00
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$if windows {
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t := true
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2021-01-08 19:41:52 +03:00
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socket_error(C.ioctlsocket(sockfd, fionbio, &t)) ?
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2020-08-21 00:01:37 +03:00
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} $else {
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2021-01-26 17:43:10 +03:00
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socket_error(C.fcntl(sockfd, C.F_SETFD, C.O_NONBLOCK)) ?
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2020-08-21 00:01:37 +03:00
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}
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// In UDP we always have to bind to a port
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2021-01-08 19:41:52 +03:00
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validate_port(local_port) ?
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2020-08-21 00:01:37 +03:00
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mut addr := C.sockaddr_in{}
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2021-01-08 19:41:52 +03:00
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addr.sin_family = int(SocketFamily.inet)
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2020-08-21 00:01:37 +03:00
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addr.sin_port = C.htons(local_port)
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addr.sin_addr.s_addr = C.htonl(C.INADDR_ANY)
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size := sizeof(C.sockaddr_in)
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// cast to the correct type
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2021-01-08 19:41:52 +03:00
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sockaddr := unsafe { &C.sockaddr(&addr) }
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socket_error(C.bind(s.handle, sockaddr, size)) ?
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2020-08-21 00:01:37 +03:00
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return s
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}
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2021-01-20 13:11:01 +03:00
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pub fn (s &UdpSocket) remote() ?Addr {
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2020-08-21 00:01:37 +03:00
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return s.r
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}
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2021-01-20 13:11:01 +03:00
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pub fn (mut s UdpSocket) set_option_bool(opt SocketOption, value bool) ? {
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2020-08-21 00:01:37 +03:00
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// TODO reenable when this `in` operation works again
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// if opt !in opts_can_set {
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// return err_option_not_settable
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// }
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// if opt !in opts_bool {
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// return err_option_wrong_type
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// }
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2021-01-08 19:41:52 +03:00
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socket_error(C.setsockopt(s.handle, C.SOL_SOCKET, int(opt), &value, sizeof(bool))) ?
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2020-08-21 00:01:37 +03:00
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return none
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}
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2021-01-20 13:11:01 +03:00
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fn (mut s UdpSocket) close() ? {
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2020-08-21 00:01:37 +03:00
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return shutdown(s.handle)
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}
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2021-01-20 13:11:01 +03:00
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fn (mut s UdpSocket) @select(test Select, timeout time.Duration) ?bool {
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2020-08-21 00:01:37 +03:00
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return @select(s.handle, test, timeout)
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}
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