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add getLocalIpAdress function #3491

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add getLocalIpAdress function #3491

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27 changes: 27 additions & 0 deletions src/network.zig
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Original file line number Diff line number Diff line change
Expand Up @@ -1954,6 +1954,33 @@ pub const Connection = struct { // MARK: Connection
}
};

fn getLocalIpAddress() !IpAddress {
const distanstAddr: std.Io.net.IpAddress = try .parse("8.8.8.8", 80);
const stream = try distanstAddr.connect(main.io, .{.mode = .dgram, .protocol = .udp});
defer stream.close(main.io);

var addr: std.posix.sockaddr.in = undefined;
if (builtin.os.tag == .windows) {
var addrLen: c_int = @sizeOf(std.posix.sockaddr.in);
if (std.c.getsockname(stream.socket.handle, @ptrCast(&addr), &addrLen) == c.SOCKET_ERROR) {
try Socket.windowsError(c.WSAGetLastError());
}
} else {
var addrLen: std.posix.socklen_t = @sizeOf(std.posix.sockaddr.in);
const result = std.c.getsockname(stream.socket.handle, @ptrCast(&addr), &addrLen);
switch (std.c.errno(result)) {
.SUCCESS => {},
else => |err| {
std.log.warn("Failed to get the addr from getsockname: {s}", .{@tagName(err)});
return error.Failed;
},
}
}
var ipAddress = std.Io.Threaded.addressFromPosix(&std.Io.Threaded.PosixAddress{.in = addr});
ipAddress.setPort(settings.defaultPort);
return ipAddress;
}

test "Resolve address" {
const addresses: [4][]const u8 = .{
"127.0.0.1",
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