module socket
private import socket_c
-intrude import standard::stream
+intrude import core::stream
# A general Socket, either TCP or UDP
abstract class Socket
return pollin(events, timeout).length != 0
end
- # Checks if the socket still is connected
+ # Is this socket still connected?
fun connected: Bool
do
if closed then return false
- var events = [new NativeSocketPollValues.pollhup, new NativeSocketPollValues.pollerr]
- if pollin(events, 0).length == 0 then
+ if native.poll_hup_err == 0 then
return true
else
closed = true
end
end
+# Socket over UDP, sends and receive data without the need for a connection
+class UDPSocket
+ super Socket
+
+ # Last error raised by this socket
+ var error: nullable Error = null
+
+ init do native = new NativeSocket.socket(
+ new NativeSocketAddressFamilies.af_inet,
+ new NativeSocketTypes.sock_dgram,
+ new NativeSocketProtocolFamilies.pf_null)
+
+ # Bind this socket to an `address`, on `port` (to all addresses if `null`)
+ #
+ # On error, sets `error` appropriately.
+ fun bind(address: nullable Text, port: Int)
+ do
+ var addr_in = new NativeSocketAddrIn
+ addr_in.port = port
+ if address != null then
+ # FIXME replace all use of gethostbyname with something not obsolete
+ var hostent = sys.gethostbyname(address.to_cstring)
+ if hostent.address_is_null then
+ error = new IOError.from_h_errno
+ addr_in.free
+ return
+ end
+
+ addr_in.fill_from_hostent hostent
+ else
+ addr_in.family = new NativeSocketAddressFamilies.af_inet
+ addr_in.address_any
+ end
+
+ if native.bind(addr_in) != 0 then error = new IOError.from_errno
+
+ addr_in.free
+ end
+
+ # Receive `length` bytes of data from any sender
+ #
+ # On error, returns an empty string and sets `error` appropriately.
+ fun recv(length: Int): String
+ do
+ var buf = new NativeString(length)
+ var len = native.recvfrom(buf, length, 0, new NativeSocketAddrIn.nul)
+ if len == -1 then
+ error = new IOError.from_errno
+ return ""
+ end
+ return buf.to_s_with_length(len)
+ end
+
+ # Receive `length` bytes of data from any sender and store the sender info in `sender.item`
+ #
+ # On error, returns an empty string and sets `error` appropriately.
+ fun recv_from(length: Int, sender: Ref[nullable SocketAddress]): String
+ do
+ var src = new NativeSocketAddrIn
+ var buf = new NativeString(length)
+
+ var len = native.recvfrom(buf, length, 0, src)
+ if len == -1 then
+ error = new IOError.from_errno
+ src.free
+ return ""
+ end
+
+ sender.item = new SocketAddress(src)
+ return buf.to_s_with_length(len)
+ end
+
+ # Send `data` to `dest_address` on `port`
+ #
+ # On error, sets `error` appropriately.
+ fun send_to(dest_address: Text, port: Int, data: Text)
+ do
+ var hostent = sys.gethostbyname(dest_address.to_cstring)
+ if hostent.address_is_null then
+ error = new IOError.from_h_errno
+ return
+ end
+
+ var dest = new NativeSocketAddrIn
+ dest.fill_from_hostent hostent
+ dest.port = port
+ native.setsockopt(new NativeSocketOptLevels.socket, new NativeSocketOptNames.broadcast, 1)
+
+ var buf = data.to_cstring
+ if native.sendto(buf, data.length, 0, dest) == -1 then
+ error = new IOError.from_errno
+ end
+ dest.free
+ end
+
+ # Enable broadcasting for this socket
+ #
+ # On error, sets `error` appropriately.
+ fun enable_broadcast=(value: Bool) do
+ var res = native.setsockopt(new NativeSocketOptLevels.socket, new NativeSocketOptNames.broadcast, value.to_i)
+ if res == -1 then error = new IOError.from_errno
+ end
+
+ # Broadcast `data` on the network on `port`
+ #
+ # On error, sets `error` appropriately.
+ #
+ # Require: setting `enable_broadcast = true`
+ fun broadcast(port: Int, data: Text)
+ do
+ var addr_in = new NativeSocketAddrIn
+ addr_in.port = port
+ addr_in.family = new NativeSocketAddressFamilies.af_inet
+ addr_in.address_broadcast
+
+ var buf = data.to_cstring
+ if native.sendto(buf, data.length, 0, addr_in) == -1 then
+ error = new IOError.from_errno
+ end
+
+ addr_in.free
+ end
+end
+
+# Address of a socket in the Internet namespace
+#
+# Used in one of the out parameters of `UDPSocket::recv_from`.
+class SocketAddress
+ super FinalizableOnce
+
+ # FIXME make init private
+
+ private var native: NativeSocketAddrIn
+
+ init
+ do
+ address = native.address.to_s
+ port = native.port
+ end
+
+ # Internet address
+ var address: String is noinit
+
+ # Port of the socket
+ var port: Int is noinit
+
+ redef fun ==(o) do return o isa SocketAddress and o.address == address and o.port == port
+
+ redef fun finalize_once do native.free
+end
+
redef class IOError
# Fill a new `IOError` from the message of `errno`
init from_errno do init errno.strerror
nitlanguage / nit.git / blobdiff