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|
// SPDX-License-Identifier: MPL-2.0
// (c) Hare authors <https://harelang.org>
use errors;
use io;
use net;
use net::ip;
use rt;
// Opens a TCP connection to the given host and port. Blocks until the
// connection is established.
export fn connect(
addr: ip::addr,
port: u16,
options: connect_option...
) (net::socket | net::error) = {
const sockaddr = ip::to_native(addr, port);
const family = match (addr) {
case ip::addr4 =>
yield rt::AF_INET: int;
case ip::addr6 =>
yield rt::AF_INET6: int;
};
let f = 0i;
for (let i = 0z; i < len(options); i += 1) {
match (options[i]) {
case let fl: net::sockflag =>
f |= fl;
case => void;
};
};
f ^= rt::SOCK_CLOEXEC; // invert CLOEXEC
const sockfd = match (rt::socket(family, rt::SOCK_STREAM | f, 0)) {
case let err: rt::errno =>
return errors::errno(err);
case let fd: int =>
yield fd;
};
for (let i = 0z; i < len(options); i += 1) {
match (options[i]) {
case keepalive =>
setsockopt(sockfd, rt::SO_KEEPALIVE, true)?;
case => void;
};
};
const sz = size(rt::sockaddr): u32;
match (rt::connect(sockfd, &sockaddr, sz)) {
case let err: rt::errno =>
if (err != rt::EINPROGRESS) {
return errors::errno(err);
};
assert(f & rt::SOCK_NONBLOCK == rt::SOCK_NONBLOCK);
case void => void;
};
return io::fdopen(sockfd);
};
// Binds a TCP socket to the given address.
export fn listen(
addr: ip::addr,
port: u16,
options: listen_option...
) (net::socket | net::error) = {
const sockaddr = ip::to_native(addr, port);
const family = match (addr) {
case ip::addr4 =>
yield rt::AF_INET: int;
case ip::addr6 =>
yield rt::AF_INET6: int;
};
let f = 0i;
for (let i = 0z; i < len(options); i += 1) {
match (options[i]) {
case let fl: net::sockflag =>
f |= fl;
case => void;
};
};
f ^= rt::SOCK_CLOEXEC; // invert CLOEXEC
const sockfd = match (rt::socket(family, rt::SOCK_STREAM | f, 0)) {
case let err: rt::errno =>
return errors::errno(err);
case let fd: int =>
yield fd;
};
let bk: u32 = 10;
for (let i = 0z; i < len(options); i += 1) {
match (options[i]) {
case reuseaddr =>
setsockopt(sockfd, rt::SO_REUSEADDR, true)?;
case reuseport =>
setsockopt(sockfd, rt::SO_REUSEPORT, true)?;
case keepalive =>
setsockopt(sockfd, rt::SO_KEEPALIVE, true)?;
case let b: backlog =>
bk = b;
case => void;
};
};
match (rt::bind(sockfd, &sockaddr, size(rt::sockaddr): u32)) {
case let err: rt::errno =>
return errors::errno(err);
case void => void;
};
match (rt::listen(sockfd, bk)) {
case let err: rt::errno =>
return errors::errno(err);
case int => void;
};
for (let i = 0z; i < len(options); i += 1) {
let portout = match (options[i]) {
case let p: portassignment =>
yield p;
case =>
continue;
};
let sn = rt::sockaddr {...};
let al = size(rt::sockaddr): u32;
match (rt::getsockname(sockfd, &sn, &al)) {
case let err: rt::errno =>
return errors::errno(err);
case int => void;
};
const addr = ip::from_native(sn);
*portout = addr.1;
};
return sockfd;
};
// Returns the remote address for a given connection, or void if none is
// available.
export fn peeraddr(peer: net::socket) ((ip::addr, u16) | void) = {
let sn = rt::sockaddr {...};
let sz = size(rt::sockaddr): u32;
if (rt::getpeername(peer, &sn, &sz) is rt::errno) {
return;
};
return ip::from_native(sn);
};
fn setsockopt(
sockfd: int,
option: int,
value: bool,
) (void | net::error) = {
let val: int = if (value) 1 else 0;
match (rt::setsockopt(sockfd, rt::SOL_SOCKET, option,
&val: *opaque, size(int): u32)) {
case let err: rt::errno =>
return errors::errno(err);
case int => void;
};
};
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