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v/vlib/net/tcp.v

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module net
import time
const (
tcp_default_read_timeout = 30 * time.second
tcp_default_write_timeout = 30 * time.second
)
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[heap]
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pub struct TcpConn {
pub mut:
sock TcpSocket
max_write_chunk_size int = 4096
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mut:
write_deadline time.Time
read_deadline time.Time
read_timeout time.Duration
write_timeout time.Duration
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}
pub fn dial_tcp(address string) ?&TcpConn {
mut s := new_tcp_socket() ?
s.connect(address) ?
return &TcpConn{
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sock: s
read_timeout: net.tcp_default_read_timeout
write_timeout: net.tcp_default_write_timeout
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}
}
pub fn (mut c TcpConn) close() ? {
$if trace_tcp ? {
eprintln(' TcpConn.close | c.sock.handle: ${c.sock.handle:6}')
}
c.sock.close() ?
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return none
}
// write_ptr blocks and attempts to write all data
pub fn (mut c TcpConn) write_ptr(b &byte, len int) ?int {
$if trace_tcp ? {
eprintln('>>> TcpConn.write_ptr | c.sock.handle: ${c.sock.handle:6} | b: ${ptr_str(b)} len: ${len:6}')
}
$if trace_tcp_data_write ? {
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eprintln('>>> TcpConn.write_ptr | data.len: ${len:6} | data: ' +
unsafe { b.vstring_with_len(len) })
}
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unsafe {
mut ptr_base := &byte(b)
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mut total_sent := 0
for total_sent < len {
ptr := ptr_base + total_sent
mut chunk_size := len - total_sent
if chunk_size > c.max_write_chunk_size {
chunk_size = c.max_write_chunk_size
}
mut sent := C.send(c.sock.handle, ptr, chunk_size, msg_nosignal)
$if trace_tcp_data_write ? {
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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if sent < 0 {
code := error_code()
if code == int(error_ewouldblock) {
c.wait_for_write() ?
continue
} else {
wrap_error(code) ?
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}
}
total_sent += sent
}
return total_sent
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}
}
// write blocks and attempts to write all data
pub fn (mut c TcpConn) write(bytes []byte) ?int {
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return c.write_ptr(bytes.data, bytes.len)
}
// write_str blocks and attempts to write all data
[deprecated: 'use TcpConn.write_string() instead']
pub fn (mut c TcpConn) write_str(s string) ?int {
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return c.write_ptr(s.str, s.len)
}
// write_string blocks and attempts to write all data
pub fn (mut c TcpConn) write_string(s string) ?int {
return c.write_ptr(s.str, s.len)
}
pub fn (mut c TcpConn) read_ptr(buf_ptr &byte, len int) ?int {
mut res := wrap_read_result(C.recv(c.sock.handle, buf_ptr, len, 0)) ?
$if trace_tcp ? {
eprintln('<<< TcpConn.read_ptr | c.sock.handle: ${c.sock.handle:6} | buf_ptr: ${ptr_str(buf_ptr):8} len: ${len:6} | res: ${res:6}')
}
if res > 0 {
$if trace_tcp_data_read ? {
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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return res
}
code := error_code()
if code == int(error_ewouldblock) {
c.wait_for_read() ?
res = wrap_read_result(C.recv(c.sock.handle, buf_ptr, len, 0)) ?
$if trace_tcp ? {
eprintln('<<< TcpConn.read_ptr | c.sock.handle: ${c.sock.handle:6} | buf_ptr: ${ptr_str(buf_ptr):8} len: ${len:6} | res: ${res:6}')
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}
$if trace_tcp_data_read ? {
if res > 0 {
eprintln('<<< TcpConn.read_ptr | 2 data.len: ${res:6} | data: ' +
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unsafe { buf_ptr.vstring_with_len(res) })
}
}
return socket_error(res)
} else {
wrap_error(code) ?
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}
return none
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}
pub fn (mut c TcpConn) read(mut buf []byte) ?int {
return c.read_ptr(buf.data, buf.len)
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}
pub fn (mut c TcpConn) read_deadline() ?time.Time {
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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 (mut c TcpConn) write_deadline() ?time.Time {
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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 {
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return c.read_timeout
}
pub fn (mut c TcpConn) set_read_timeout(t time.Duration) {
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c.read_timeout = t
}
pub fn (c &TcpConn) write_timeout() time.Duration {
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return c.write_timeout
}
pub fn (mut c TcpConn) set_write_timeout(t time.Duration) {
c.write_timeout = t
}
[inline]
pub fn (mut c TcpConn) wait_for_read() ? {
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return wait_for_read(c.sock.handle, c.read_deadline, c.read_timeout)
}
[inline]
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)
}
pub fn (c &TcpConn) peer_addr() ?Addr {
mut addr := C.sockaddr{}
len := sizeof(C.sockaddr)
socket_error(C.getpeername(c.sock.handle, &addr, &len)) ?
return new_addr(addr)
}
pub fn (c &TcpConn) peer_ip() ?string {
buf := [44]char{}
peeraddr := C.sockaddr_in{}
speeraddr := sizeof(peeraddr)
socket_error(C.getpeername(c.sock.handle, unsafe { &C.sockaddr(&peeraddr) }, &speeraddr)) ?
cstr := &char(C.inet_ntop(SocketFamily.inet, &peeraddr.sin_addr, &buf[0], sizeof(buf)))
if cstr == 0 {
return error('net.peer_ip: inet_ntop failed')
}
res := unsafe { cstring_to_vstring(cstr) }
return res
}
pub fn (c TcpConn) str() string {
s := c.sock.str().replace('\n', ' ').replace(' ', ' ')
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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}
pub struct TcpListener {
pub mut:
sock TcpSocket
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mut:
accept_timeout time.Duration
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accept_deadline time.Time
}
pub fn listen_tcp(port int) ?&TcpListener {
s := new_tcp_socket() ?
validate_port(port) ?
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mut addr := C.sockaddr_in{}
addr.sin_family = int(SocketFamily.inet)
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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 := unsafe { &C.sockaddr(&addr) }
socket_error(C.bind(s.handle, sockaddr, size)) ?
socket_error(C.listen(s.handle, 128)) ?
return &TcpListener{
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sock: s
accept_deadline: no_deadline
accept_timeout: infinite_timeout
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}
}
pub fn (mut l TcpListener) accept() ?&TcpConn {
$if trace_tcp ? {
eprintln(' TcpListener.accept | l.sock.handle: ${l.sock.handle:6}')
}
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addr := C.sockaddr_storage{}
unsafe { C.memset(&addr, 0, sizeof(C.sockaddr_storage)) }
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size := sizeof(C.sockaddr_storage)
// cast to correct type
sock_addr := unsafe { &C.sockaddr(&addr) }
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mut new_handle := C.accept(l.sock.handle, sock_addr, &size)
if new_handle <= 0 {
l.wait_for_accept() ?
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new_handle = C.accept(l.sock.handle, sock_addr, &size)
if new_handle == -1 || new_handle == 0 {
return none
}
}
new_sock := tcp_socket_from_handle(new_handle) ?
$if trace_tcp ? {
eprintln(' TcpListener.accept | << new_sock.handle: ${new_sock.handle:6}')
}
return &TcpConn{
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sock: new_sock
read_timeout: net.tcp_default_read_timeout
write_timeout: net.tcp_default_write_timeout
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}
}
pub fn (c &TcpListener) accept_deadline() ?time.Time {
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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 {
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return c.accept_timeout
}
pub fn (mut c TcpListener) set_accept_timeout(t time.Duration) {
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c.accept_timeout = t
}
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)
}
pub fn (mut c TcpListener) close() ? {
$if trace_tcp ? {
eprintln(' TcpListener.close | c.sock.handle: ${c.sock.handle:6}')
}
c.sock.close() ?
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return none
}
pub fn (c &TcpListener) address() ?Addr {
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return c.sock.address()
}
struct TcpSocket {
pub:
handle int
}
fn new_tcp_socket() ?TcpSocket {
sockfd := socket_error(C.socket(SocketFamily.inet, SocketType.tcp, 0)) ?
mut s := TcpSocket{
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handle: sockfd
}
$if trace_tcp ? {
eprintln(' new_tcp_socket | s.handle: ${s.handle:6}')
}
// s.set_option_bool(.reuse_addr, true)?
s.set_option_int(.reuse_addr, 1) ?
$if !net_blocking_sockets ? {
$if windows {
t := u32(1) // true
socket_error(C.ioctlsocket(sockfd, fionbio, &t)) ?
} $else {
socket_error(C.fcntl(sockfd, C.F_SETFL, C.fcntl(sockfd, C.F_GETFL) | C.O_NONBLOCK)) ?
}
}
return s
}
fn tcp_socket_from_handle(sockfd int) ?TcpSocket {
mut s := TcpSocket{
handle: sockfd
}
$if trace_tcp ? {
eprintln(' tcp_socket_from_handle | s.handle: ${s.handle:6}')
}
// s.set_option_bool(.reuse_addr, true)?
s.set_option_int(.reuse_addr, 1) ?
$if !net_blocking_sockets ? {
$if windows {
t := u32(1) // true
socket_error(C.ioctlsocket(sockfd, fionbio, &t)) ?
} $else {
socket_error(C.fcntl(sockfd, C.F_SETFL, C.fcntl(sockfd, C.F_GETFL) | C.O_NONBLOCK)) ?
}
}
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return s
}
pub fn (mut s TcpSocket) set_option_bool(opt SocketOption, value bool) ? {
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// 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
// }
x := int(value)
socket_error(C.setsockopt(s.handle, C.SOL_SOCKET, int(opt), &x, sizeof(int))) ?
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return none
}
pub fn (mut s TcpSocket) set_option_int(opt SocketOption, value int) ? {
socket_error(C.setsockopt(s.handle, C.SOL_SOCKET, int(opt), &value, sizeof(int))) ?
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return none
}
fn (mut s TcpSocket) close() ? {
$if trace_tcp ? {
eprintln(' TcpSocket.close | s.handle: ${s.handle:6}')
}
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return shutdown(s.handle)
}
fn (mut s TcpSocket) @select(test Select, timeout time.Duration) ?bool {
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return @select(s.handle, test, timeout)
}
const (
connect_timeout = 5 * time.second
)
fn (mut s TcpSocket) connect(a string) ? {
$if trace_tcp ? {
eprintln(' TcpSocket.connect | s.handle: ${s.handle:6} | a: $a')
}
addr := resolve_addr(a, .inet, .tcp) ?
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res := C.connect(s.handle, &addr.addr, addr.len)
if res == 0 {
return none
}
_ := error_code()
write_result := s.@select(.write, net.connect_timeout) ?
if write_result {
// succeeded
return none
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}
except_result := s.@select(.except, net.connect_timeout) ?
if except_result {
return err_connect_failed
}
// otherwise we timed out
return err_connect_timed_out
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}
// address gets the address of a socket
pub fn (s &TcpSocket) address() ?Addr {
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mut addr := C.sockaddr_in{}
size := sizeof(C.sockaddr_in)
// cast to the correct type
sockaddr := unsafe { &C.sockaddr(&addr) }
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C.getsockname(s.handle, sockaddr, &size)
return new_addr(sockaddr)
}