426 lines
11 KiB
V
426 lines
11 KiB
V
module net
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import time
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const (
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tcp_default_read_timeout = 30 * time.second
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tcp_default_write_timeout = 30 * time.second
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)
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[heap]
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pub struct TcpConn {
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pub mut:
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sock TcpSocket
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mut:
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write_deadline time.Time
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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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is_blocking bool
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}
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pub fn dial_tcp(address string) ?&TcpConn {
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addrs := resolve_addrs_fuzzy(address, .tcp) or {
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return error('$err.msg; could not resolve address $address in dial_tcp')
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}
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// Very simple dialer
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for addr in addrs {
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mut s := new_tcp_socket(addr.family()) or {
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return error('$err.msg; could not create new tcp socket in dial_tcp')
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}
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s.connect(addr) or {
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// Connection failed
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s.close() or { continue }
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continue
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}
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return &TcpConn{
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sock: s
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read_timeout: net.tcp_default_read_timeout
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write_timeout: net.tcp_default_write_timeout
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}
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}
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// failed
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return error('dial_tcp failed for address $address')
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}
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pub fn (mut c TcpConn) close() ? {
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$if trace_tcp ? {
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eprintln(' TcpConn.close | c.sock.handle: ${c.sock.handle:6}')
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}
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c.sock.close() ?
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}
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pub fn (c TcpConn) read_ptr(buf_ptr &byte, len int) ?int {
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mut res := wrap_read_result(C.recv(c.sock.handle, voidptr(buf_ptr), len, 0)) ?
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$if trace_tcp ? {
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eprintln('<<< TcpConn.read_ptr | c.sock.handle: $c.sock.handle | buf_ptr: ${ptr_str(buf_ptr)} len: $len | res: $res')
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}
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if res > 0 {
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$if trace_tcp_data_read ? {
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eprintln('<<< TcpConn.read_ptr | 1 data.len: ${res:6} | data: ' +
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unsafe { buf_ptr.vstring_with_len(res) })
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}
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return res
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}
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code := error_code()
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if code == int(error_ewouldblock) {
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c.wait_for_read() ?
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res = wrap_read_result(C.recv(c.sock.handle, voidptr(buf_ptr), len, 0)) ?
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$if trace_tcp ? {
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eprintln('<<< TcpConn.read_ptr | c.sock.handle: $c.sock.handle | buf_ptr: ${ptr_str(buf_ptr)} len: $len | res: $res')
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}
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$if trace_tcp_data_read ? {
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if res > 0 {
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eprintln('<<< TcpConn.read_ptr | 2 data.len: ${res:6} | data: ' +
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unsafe { buf_ptr.vstring_with_len(res) })
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}
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}
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return socket_error(res)
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} else {
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wrap_error(code) ?
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}
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return none
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}
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pub fn (c TcpConn) read(mut buf []byte) ?int {
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return c.read_ptr(buf.data, buf.len)
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}
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pub fn (mut c TcpConn) read_deadline() ?time.Time {
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if c.read_deadline.unix == 0 {
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return c.read_deadline
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}
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return none
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}
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// write_ptr blocks and attempts to write all data
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pub fn (mut c TcpConn) write_ptr(b &byte, len int) ?int {
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$if trace_tcp ? {
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eprintln(
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'>>> TcpConn.write_ptr | c.sock.handle: $c.sock.handle | b: ${ptr_str(b)} len: $len |\n' +
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unsafe { b.vstring_with_len(len) })
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}
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$if trace_tcp_data_write ? {
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eprintln('>>> TcpConn.write_ptr | data.len: ${len:6} | data: ' +
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unsafe { b.vstring_with_len(len) })
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}
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unsafe {
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mut ptr_base := &byte(b)
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mut total_sent := 0
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for total_sent < len {
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ptr := ptr_base + total_sent
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remaining := len - total_sent
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mut sent := C.send(c.sock.handle, ptr, remaining, msg_nosignal)
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$if trace_tcp_data_write ? {
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eprintln('>>> TcpConn.write_ptr | data chunk, total_sent: ${total_sent:6}, chunk_size: ${chunk_size:6}, sent: ${sent:6}, ptr: ${ptr_str(ptr)}')
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}
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if sent < 0 {
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code := error_code()
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if code == int(error_ewouldblock) {
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c.wait_for_write() ?
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continue
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} else {
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wrap_error(code) ?
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}
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}
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total_sent += sent
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}
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return total_sent
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}
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}
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// write blocks and attempts to write all data
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pub fn (mut c TcpConn) write(bytes []byte) ?int {
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return c.write_ptr(bytes.data, bytes.len)
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}
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// write_string blocks and attempts to write all data
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pub fn (mut c TcpConn) write_string(s string) ?int {
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return c.write_ptr(s.str, s.len)
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}
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pub fn (mut c TcpConn) set_read_deadline(deadline time.Time) {
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c.read_deadline = deadline
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}
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pub fn (mut c TcpConn) write_deadline() ?time.Time {
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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 TcpConn) set_write_deadline(deadline time.Time) {
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c.write_deadline = deadline
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}
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pub fn (c &TcpConn) read_timeout() time.Duration {
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return c.read_timeout
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}
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pub fn (mut c TcpConn) set_read_timeout(t time.Duration) {
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c.read_timeout = t
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}
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pub fn (c &TcpConn) write_timeout() time.Duration {
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return c.write_timeout
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}
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pub fn (mut c TcpConn) 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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pub fn (c TcpConn) wait_for_read() ? {
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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 TcpConn) wait_for_write() ? {
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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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pub fn (c &TcpConn) peer_addr() ?Addr {
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mut addr := Addr{
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addr: AddrData{
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Ip6: Ip6{}
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}
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}
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mut size := sizeof(Addr)
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socket_error_message(C.getpeername(c.sock.handle, voidptr(&addr), &size), 'peer_addr failed') ?
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return addr
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}
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pub fn (c &TcpConn) peer_ip() ?string {
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return c.peer_addr() ?.str()
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}
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pub fn (c &TcpConn) addr() ?Addr {
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return c.sock.address()
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}
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pub fn (c TcpConn) str() string {
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s := c.sock.str().replace('\n', ' ').replace(' ', ' ')
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return 'TcpConn{ write_deadline: $c.write_deadline, read_deadline: $c.read_deadline, read_timeout: $c.read_timeout, write_timeout: $c.write_timeout, sock: $s }'
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}
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pub struct TcpListener {
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pub mut:
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sock TcpSocket
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mut:
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accept_timeout time.Duration
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accept_deadline time.Time
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}
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pub fn listen_tcp(family AddrFamily, saddr string) ?&TcpListener {
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s := new_tcp_socket(family) or { return error('$err.msg; could not create new socket') }
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addrs := resolve_addrs(saddr, family, .tcp) or {
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return error('$err.msg; could not resolve address $saddr')
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}
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// TODO(logic to pick here)
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addr := addrs[0]
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// cast to the correct type
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alen := addr.len()
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socket_error_message(C.bind(s.handle, voidptr(&addr), alen), 'binding to $saddr failed') ?
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socket_error_message(C.listen(s.handle, 128), 'listening on $saddr failed') ?
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return &TcpListener{
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sock: s
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accept_deadline: no_deadline
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accept_timeout: infinite_timeout
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}
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}
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pub fn (mut l TcpListener) accept() ?&TcpConn {
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$if trace_tcp ? {
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eprintln(' TcpListener.accept | l.sock.handle: ${l.sock.handle:6}')
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}
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addr := Addr{
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addr: AddrData{
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Ip6: Ip6{}
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}
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}
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size := sizeof(Addr)
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mut new_handle := C.accept(l.sock.handle, voidptr(&addr), &size)
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if new_handle <= 0 {
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l.wait_for_accept() ?
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new_handle = C.accept(l.sock.handle, voidptr(&addr), &size)
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if new_handle == -1 || new_handle == 0 {
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return error('accept failed')
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}
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}
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new_sock := tcp_socket_from_handle(new_handle) ?
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$if trace_tcp ? {
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eprintln(' TcpListener.accept | << new_sock.handle: ${new_sock.handle:6}')
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}
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return &TcpConn{
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sock: new_sock
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read_timeout: net.tcp_default_read_timeout
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write_timeout: net.tcp_default_write_timeout
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}
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}
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pub fn (c &TcpListener) accept_deadline() ?time.Time {
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if c.accept_deadline.unix != 0 {
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return c.accept_deadline
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}
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return error('invalid deadline')
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}
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pub fn (mut c TcpListener) set_accept_deadline(deadline time.Time) {
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c.accept_deadline = deadline
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}
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pub fn (c &TcpListener) accept_timeout() time.Duration {
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return c.accept_timeout
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}
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pub fn (mut c TcpListener) set_accept_timeout(t time.Duration) {
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c.accept_timeout = t
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}
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pub fn (mut c TcpListener) wait_for_accept() ? {
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return wait_for_read(c.sock.handle, c.accept_deadline, c.accept_timeout)
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}
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pub fn (mut c TcpListener) close() ? {
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c.sock.close() ?
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}
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pub fn (c &TcpListener) addr() ?Addr {
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return c.sock.address()
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}
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struct TcpSocket {
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pub:
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handle int
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}
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fn new_tcp_socket(family AddrFamily) ?TcpSocket {
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handle := socket_error(C.socket(family, SocketType.tcp, 0)) ?
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mut s := TcpSocket{
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handle: handle
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}
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$if trace_tcp ? {
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eprintln(' new_tcp_socket | s.handle: ${s.handle:6}')
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}
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// TODO(emily):
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// we shouldnt be using ioctlsocket in the 21st century
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// use the non-blocking socket option instead please :)
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// TODO(emily):
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// Move this to its own function on the socket
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s.set_option_int(.reuse_addr, 1) ?
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$if !net_blocking_sockets ? {
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$if windows {
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t := u32(1) // true
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socket_error(C.ioctlsocket(handle, fionbio, &t)) ?
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} $else {
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socket_error(C.fcntl(handle, C.F_SETFL, C.fcntl(handle, C.F_GETFL) | C.O_NONBLOCK)) ?
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}
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}
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return s
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}
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fn tcp_socket_from_handle(sockfd int) ?TcpSocket {
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mut s := TcpSocket{
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handle: sockfd
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}
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$if trace_tcp ? {
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eprintln(' tcp_socket_from_handle | s.handle: ${s.handle:6}')
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}
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// s.set_option_bool(.reuse_addr, true)?
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s.set_option_int(.reuse_addr, 1) ?
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s.set_dualstack(true) or {
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// Not ipv6, we dont care
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}
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$if !net_blocking_sockets ? {
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$if windows {
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t := u32(1) // true
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socket_error(C.ioctlsocket(sockfd, fionbio, &t)) ?
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} $else {
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socket_error(C.fcntl(sockfd, C.F_SETFL, C.fcntl(sockfd, C.F_GETFL) | C.O_NONBLOCK)) ?
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}
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}
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return s
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}
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pub fn (mut s TcpSocket) set_option_bool(opt SocketOption, value bool) ? {
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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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x := int(value)
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socket_error(C.setsockopt(s.handle, C.SOL_SOCKET, int(opt), &x, sizeof(int))) ?
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}
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pub fn (mut s TcpSocket) set_dualstack(on bool) ? {
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x := int(!on)
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socket_error(C.setsockopt(s.handle, C.IPPROTO_IPV6, int(SocketOption.ipv6_only), &x,
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sizeof(int))) ?
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}
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pub fn (mut s TcpSocket) set_option_int(opt SocketOption, value int) ? {
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socket_error(C.setsockopt(s.handle, C.SOL_SOCKET, int(opt), &value, sizeof(int))) ?
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}
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fn (mut s TcpSocket) close() ? {
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return shutdown(s.handle)
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}
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fn (mut s TcpSocket) @select(test Select, timeout time.Duration) ?bool {
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return @select(s.handle, test, timeout)
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}
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const (
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connect_timeout = 5 * time.second
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)
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fn (mut s TcpSocket) connect(a Addr) ? {
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res := C.connect(s.handle, voidptr(&a), a.len())
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if res == 0 {
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return
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}
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// The socket is nonblocking and the connection cannot be completed
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// immediately. (UNIX domain sockets failed with EAGAIN instead.)
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// It is possible to select(2) or poll(2) for completion by selecting
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// the socket for writing. After select(2) indicates writability,
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// use getsockopt(2) to read the SO_ERROR option at level SOL_SOCKET to
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// determine whether connect() completed successfully (SO_ERROR is zero) or
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// unsuccessfully (SO_ERROR is one of the usual error codes listed here,
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// ex‐ plaining the reason for the failure).
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write_result := s.@select(.write, net.connect_timeout) ?
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if write_result {
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err := 0
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len := sizeof(err)
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socket_error(C.getsockopt(s.handle, C.SOL_SOCKET, C.SO_ERROR, &err, &len)) ?
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if err != 0 {
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return wrap_error(err)
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}
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// Succeeded
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return
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}
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// Get the error
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socket_error(C.connect(s.handle, voidptr(&a), a.len())) ?
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// otherwise we timed out
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return err_connect_timed_out
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}
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// address gets the address of a socket
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pub fn (s &TcpSocket) address() ?Addr {
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return addr_from_socket_handle(s.handle)
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}
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