manually start merging core_net

6 files changed, 538 insertions, 146 deletions

diff --git a/core/sys/unix/syscalls_linux.odin b/core/sys/unix/syscalls_linux.odin
index 91c0accfa..3659d8437 100644
--- a/core/sys/unix/syscalls_linux.odin
+++ b/core/sys/unix/syscalls_linux.odin
@@ -2008,6 +2008,42 @@ sys_utimensat :: proc "contextless" (dfd: int, path: cstring, times: rawptr, fla
 	return int(intrinsics.syscall(SYS_utimensat, uintptr(dfd), uintptr(rawptr(path)), uintptr(times), uintptr(flags)))
 }
 
+sys_socket :: proc "contextless" (domain: int, type: int, protocol: int) -> int {
+	return int(intrinsics.syscall(unix.SYS_socket, uintptr(domain), uintptr(type), uintptr(protocol)))
+}
+
+sys_connect :: proc "contextless" (sd: int, addr: rawptr, len: socklen_t) -> int {
+	return int(intrinsics.syscall(unix.SYS_connect, uintptr(sd), uintptr(addr), uintptr(len)))
+}
+
+sys_accept :: proc "contextless" (sd: int, addr: rawptr, len: rawptr) -> int {
+	return int(intrinsics.syscall(unix.SYS_accept4, uintptr(sd), uintptr(addr), uintptr(len), uintptr(0)))
+}
+
+sys_listen :: proc "contextless" (sd: int, backlog: int) -> int {
+	return int(intrinsics.syscall(unix.SYS_listen, uintptr(sd), uintptr(backlog)))
+}
+
+sys_bind :: proc "contextless" (sd: int, addr: rawptr, len: socklen_t) -> int {
+	return int(intrinsics.syscall(unix.SYS_bind, uintptr(sd), uintptr(addr), uintptr(len)))
+}
+
+sys_setsockopt :: proc "contextless" (sd: int, level: int, optname: int, optval: rawptr, optlen: socklen_t) -> int {
+	return int(intrinsics.syscall(unix.SYS_setsockopt, uintptr(sd), uintptr(level), uintptr(optname), uintptr(optval), uintptr(optlen)))
+}
+
+sys_recvfrom :: proc "contextless" (sd: int, buf: rawptr, len: uint, flags: int, addr: rawptr, alen: uintptr) -> i64 {
+	return i64(intrinsics.syscall(unix.SYS_recvfrom, uintptr(sd), uintptr(buf), uintptr(len), uintptr(flags), uintptr(addr), uintptr(alen)))
+}
+
+sys_sendto :: proc "contextless" (sd: int, buf: rawptr, len: uint, flags: int, addr: rawptr, alen: socklen_t) -> i64 {
+	return i64(intrinsics.syscall(unix.SYS_sendto, uintptr(sd), uintptr(buf), uintptr(len), uintptr(flags), uintptr(addr), uintptr(alen)))
+}
+
+sys_shutdown :: proc "contextless" (sd: int, how: int) -> int {
+	return int(intrinsics.syscall(unix.SYS_shutdown, uintptr(sd), uintptr(how)))
+}
+
 sys_perf_event_open :: proc "contextless" (event_attr: rawptr, pid: i32, cpu: i32, group_fd: i32, flags: u32) -> int {
 	return int(intrinsics.syscall(SYS_perf_event_open, uintptr(event_attr), uintptr(pid), uintptr(cpu), uintptr(group_fd), uintptr(flags)))
 }
diff --git a/core/sys/windows/dnsapi.odin b/core/sys/windows/dnsapi.odin
new file mode 100644
index 000000000..623fa2889
--- /dev/null
+++ b/core/sys/windows/dnsapi.odin
@@ -0,0 +1,10 @@
+// +build windows
+package sys_windows
+
+foreign import "system:Dnsapi.lib"
+
+@(default_calling_convention="std")
+foreign Dnsapi {
+    DnsQuery_UTF8 :: proc(name: cstring, type: u16, options: DWORD, extra: PVOID, results: ^^DNS_RECORD, reserved: PVOID) -> DNS_STATUS ---
+    DnsRecordListFree :: proc(list: ^DNS_RECORD, options: DWORD) ---
+}
diff --git a/core/sys/windows/ip_helper.odin b/core/sys/windows/ip_helper.odin
new file mode 100644
index 000000000..d8f93f533
--- /dev/null
+++ b/core/sys/windows/ip_helper.odin
@@ -0,0 +1,234 @@
+// +build windows
+package sys_windows
+
+foreign import "system:iphlpapi.lib"
+
+Address_Family :: enum u32 {
+	Unspecified = 0,   // Return both IPv4 and IPv6 addresses associated with adapters with them enabled.
+	IPv4        = 2,   // Return only IPv4 addresses associated with adapters with it enabled.
+	IPv6        = 23,  // Return only IPv6 addresses associated with adapters with it enabled.
+}
+
+GAA_Flag :: enum u32 {
+	Skip_Unicast                 = 0,  // Do not return unicast addresses.
+	Skip_Anycast                 = 1,  // Do not return IPv6 anycast addresses.
+	Skip_Multicast               = 2,  // Do not return multicast addresses.
+	Skip_DNS_Server              = 3,  // Do not return addresses of DNS servers.
+	Include_Prefix               = 4,  // (XP SP1+) Return a list of IP address prefixes on this adapter. When this flag is set, IP address prefixes are returned for both IPv6 and IPv4 addresses.
+	Skip_Friendly_Name           = 5,  // Do not return the adapter friendly name.
+	Include_WINS_info            = 6,  // (Vista+) Return addresses of Windows Internet Name Service (WINS) servers.
+	Include_Gateways             = 7,  // (Vista+) Return the addresses of default gateways.
+	Include_All_Interfaces       = 8,  // (Vista+) Return addresses for all NDIS interfaces.
+	Include_All_Compartments     = 9,  // (Reserved, Unsupported) Return addresses in all routing compartments.
+	Include_Tunnel_Binding_Order = 10, // (Vista+) Return the adapter addresses sorted in tunnel binding order.
+}
+GAA_Flags :: bit_set[GAA_Flag; u32]
+
+IP_Adapter_Addresses :: struct {
+	Raw: struct #raw_union {
+		Alignment: u64,
+		Anonymous: struct {
+			Length:  u32,
+			IfIndex: u32,
+		},
+	},
+	Next:                   ^IP_Adapter_Addresses,
+	AdapterName:            cstring,
+	FirstUnicastAddress:    ^IP_ADAPTER_UNICAST_ADDRESS_LH,
+	FirstAnycastAddress:    ^IP_ADAPTER_ANYCAST_ADDRESS_XP,
+	FirstMulticastAddress:  ^IP_ADAPTER_MULTICAST_ADDRESS_XP,
+	FirstDnsServerAddress:  ^IP_ADAPTER_DNS_SERVER_ADDRESS_XP,
+	DnsSuffix:              ^u16,
+	Description:            ^u16,
+	FriendlyName:           ^u16,
+	PhysicalAddress:        [8]u8,
+	PhysicalAddressLength:  u32,
+	Anonymous2:             struct #raw_union {
+		Flags:     u32,
+		Anonymous: struct {
+			_bitfield: u32,
+		},
+	},
+	MTU:                    u32,
+	IfType:                 u32,
+	OperStatus:             IF_OPER_STATUS,
+	Ipv6IfIndex:            u32,
+	ZoneIndices:            [16]u32,
+	FirstPrefix:            rawptr, // ^IP_ADAPTER_PREFIX_XP,
+	TransmitLinkSpeed:      u64,
+	ReceiveLinkSpeed:       u64,
+	FirstWinsServerAddress: rawptr, // ^IP_ADAPTER_WINS_SERVER_ADDRESS_LH,
+	FirstGatewayAddress:    ^IP_ADAPTER_GATEWAY_ADDRESS_LH,
+	Ipv4Metric:             u32,
+	Ipv6Metric:             u32,
+	Luid:                   NET_LUID_LH,
+	Dhcpv4Server:           SOCKET_ADDRESS,
+	CompartmentId:          u32,
+	NetworkGuid:            GUID,
+	ConnectionType:         NET_IF_CONNECTION_TYPE,
+	TunnelType:             TUNNEL_TYPE,
+	Dhcpv6Server:           SOCKET_ADDRESS,
+	Dhcpv6ClientDuid:       [130]u8,
+	Dhcpv6ClientDuidLength: u32,
+	Dhcpv6Iaid:             u32,
+	FirstDnsSuffix:         rawptr, // ^IP_ADAPTER_DNS_SUFFIX,
+}
+
+IP_ADAPTER_UNICAST_ADDRESS_LH :: struct {
+	Anonymous:          struct #raw_union {
+		Alignment: u64,
+		Anonymous: struct {
+			Length: u32,
+			Flags:  u32,
+		},
+	},
+	Next:               ^IP_ADAPTER_UNICAST_ADDRESS_LH,
+	Address:            SOCKET_ADDRESS,
+	PrefixOrigin:       NL_PREFIX_ORIGIN,
+	SuffixOrigin:       NL_SUFFIX_ORIGIN,
+	DadState:           NL_DAD_STATE,
+	ValidLifetime:      u32,
+	PreferredLifetime:  u32,
+	LeaseLifetime:      u32,
+	OnLinkPrefixLength: u8,
+}
+
+IP_ADAPTER_ANYCAST_ADDRESS_XP :: struct {
+	Anonymous: struct #raw_union {
+		Alignment: u64,
+		Anonymous: struct {
+			Length: u32,
+			Flags:  u32,
+		},
+	},
+	Next:      ^IP_ADAPTER_ANYCAST_ADDRESS_XP,
+	Address:   SOCKET_ADDRESS,
+}
+
+IP_ADAPTER_MULTICAST_ADDRESS_XP :: struct {
+	Anonymous: struct #raw_union {
+		Alignment: u64,
+		Anonymous: struct {
+			Length: u32,
+			Flags:  u32,
+		},
+	},
+	Next:      ^IP_ADAPTER_MULTICAST_ADDRESS_XP,
+	Address:   SOCKET_ADDRESS,
+}
+
+IP_ADAPTER_GATEWAY_ADDRESS_LH :: struct {
+	Anonymous: struct #raw_union {
+		Alignment: u64,
+		Anonymous: struct {
+			Length:   u32,
+			Reserved: u32,
+		},
+	},
+	Next:      ^IP_ADAPTER_GATEWAY_ADDRESS_LH,
+	Address:   SOCKET_ADDRESS,
+}
+
+IP_ADAPTER_DNS_SERVER_ADDRESS_XP :: struct {
+	Anonymous: struct #raw_union {
+		Alignment: u64,
+		Anonymous: struct {
+			Length:   u32,
+			Reserved: u32,
+		},
+	},
+	Next:      ^IP_ADAPTER_DNS_SERVER_ADDRESS_XP,
+	Address:   SOCKET_ADDRESS,
+}
+
+IF_OPER_STATUS :: enum i32 {
+	Up             = 1,
+	Down           = 2,
+	Testing        = 3,
+	Unknown        = 4,
+	Dormant        = 5,
+	NotPresent     = 6,
+	LowerLayerDown = 7,
+}
+
+NET_LUID_LH :: struct #raw_union {
+	Value: u64,
+	Info:  struct {
+		_bitfield: u64,
+	},
+}
+
+SOCKET_ADDRESS :: struct {
+	lpSockaddr:      ^SOCKADDR,
+	iSockaddrLength: i32,
+}
+
+NET_IF_CONNECTION_TYPE :: enum i32 {
+	NET_IF_CONNECTION_DEDICATED = 1,
+	NET_IF_CONNECTION_PASSIVE   = 2,
+	NET_IF_CONNECTION_DEMAND    = 3,
+	NET_IF_CONNECTION_MAXIMUM   = 4,
+}
+
+TUNNEL_TYPE :: enum i32 {
+	TUNNEL_TYPE_NONE    = 0,
+	TUNNEL_TYPE_OTHER   = 1,
+	TUNNEL_TYPE_DIRECT  = 2,
+	TUNNEL_TYPE_6TO4    = 11,
+	TUNNEL_TYPE_ISATAP  = 13,
+	TUNNEL_TYPE_TEREDO  = 14,
+	TUNNEL_TYPE_IPHTTPS = 15,
+}
+NL_PREFIX_ORIGIN :: enum i32 {
+	IpPrefixOriginOther               = 0,
+	IpPrefixOriginManual              = 1,
+	IpPrefixOriginWellKnown           = 2,
+	IpPrefixOriginDhcp                = 3,
+	IpPrefixOriginRouterAdvertisement = 4,
+	IpPrefixOriginUnchanged           = 16,
+}
+
+NL_SUFFIX_ORIGIN :: enum i32 {
+	NlsoOther                      = 0,
+	NlsoManual                     = 1,
+	NlsoWellKnown                  = 2,
+	NlsoDhcp                       = 3,
+	NlsoLinkLayerAddress           = 4,
+	NlsoRandom                     = 5,
+	IpSuffixOriginOther            = 0,
+	IpSuffixOriginManual           = 1,
+	IpSuffixOriginWellKnown        = 2,
+	IpSuffixOriginDhcp             = 3,
+	IpSuffixOriginLinkLayerAddress = 4,
+	IpSuffixOriginRandom           = 5,
+	IpSuffixOriginUnchanged        = 16,
+}
+
+NL_DAD_STATE :: enum i32 {
+	NldsInvalid          = 0,
+	NldsTentative        = 1,
+	NldsDuplicate        = 2,
+	NldsDeprecated       = 3,
+	NldsPreferred        = 4,
+	IpDadStateInvalid    = 0,
+	IpDadStateTentative  = 1,
+	IpDadStateDuplicate  = 2,
+	IpDadStateDeprecated = 3,
+	IpDadStatePreferred  = 4,
+}
+
+@(default_calling_convention = "std")
+foreign iphlpapi {
+	/*
+		The GetAdaptersAddresses function retrieves the addresses associated with the adapters on the local computer.
+		See: https://docs.microsoft.com/en-us/windows/win32/api/iphlpapi/nf-iphlpapi-getadaptersaddresses
+	*/
+	@(link_name="GetAdaptersAddresses") get_adapters_addresses :: proc(
+		family:            Address_Family,
+		flags:             GAA_Flags,
+		_reserved:         rawptr,
+		adapter_addresses: [^]IP_Adapter_Addresses,
+		size:              ^u32,
+	) -> ULONG ---
+
+}
diff --git a/core/sys/windows/types.odin b/core/sys/windows/types.odin
index 1d5bdaf04..cb2c55cd3 100644
--- a/core/sys/windows/types.odin
+++ b/core/sys/windows/types.odin
@@ -154,10 +154,6 @@ TIMER_QUERY_STATE  :: 0x0001
 TIMER_MODIFY_STATE :: 0x0002
 TIMER_ALL_ACCESS   :: STANDARD_RIGHTS_REQUIRED | SYNCHRONIZE | TIMER_QUERY_STATE | TIMER_MODIFY_STATE
 
-SOCKET :: distinct uintptr // TODO
-socklen_t :: c_int
-ADDRESS_FAMILY :: USHORT
-
 TRUE  :: BOOL(true)
 FALSE :: BOOL(false)
 
@@ -1868,30 +1864,6 @@ BI_BITFIELDS :: 3
 BI_JPEG      :: 4
 BI_PNG       :: 5
 
-WSA_FLAG_OVERLAPPED: DWORD : 0x01
-WSA_FLAG_NO_HANDLE_INHERIT: DWORD : 0x80
-
-WSADESCRIPTION_LEN :: 256
-WSASYS_STATUS_LEN :: 128
-WSAPROTOCOL_LEN: DWORD : 255
-INVALID_SOCKET :: ~SOCKET(0)
-
-WSAEACCES: c_int : 10013
-WSAEINVAL: c_int : 10022
-WSAEWOULDBLOCK: c_int : 10035
-WSAEPROTOTYPE: c_int : 10041
-WSAEADDRINUSE: c_int : 10048
-WSAEADDRNOTAVAIL: c_int : 10049
-WSAECONNABORTED: c_int : 10053
-WSAECONNRESET: c_int : 10054
-WSAENOTCONN: c_int : 10057
-WSAESHUTDOWN: c_int : 10058
-WSAETIMEDOUT: c_int : 10060
-WSAECONNREFUSED: c_int : 10061
-WSATRY_AGAIN: c_int : 11002
-
-MAX_PROTOCOL_CHAIN: DWORD : 7
-
 MAXIMUM_REPARSE_DATA_BUFFER_SIZE :: 16 * 1024
 FSCTL_GET_REPARSE_POINT: DWORD : 0x900a8
 IO_REPARSE_TAG_SYMLINK: DWORD : 0xa000000c
@@ -1949,44 +1921,6 @@ CREATE_NEW_PROCESS_GROUP: DWORD : 0x00000200
 CREATE_UNICODE_ENVIRONMENT: DWORD : 0x00000400
 STARTF_USESTDHANDLES: DWORD : 0x00000100
 
-AF_INET: c_int : 2
-AF_INET6: c_int : 23
-SD_BOTH: c_int : 2
-SD_RECEIVE: c_int : 0
-SD_SEND: c_int : 1
-SOCK_DGRAM: c_int : 2
-SOCK_STREAM: c_int : 1
-SOL_SOCKET: c_int : 0xffff
-SO_RCVTIMEO: c_int : 0x1006
-SO_SNDTIMEO: c_int : 0x1005
-SO_REUSEADDR: c_int : 0x0004
-IPPROTO_IP: c_int : 0
-IPPROTO_TCP: c_int : 6
-IPPROTO_IPV6: c_int : 41
-TCP_NODELAY: c_int : 0x0001
-IP_TTL: c_int : 4
-IPV6_V6ONLY: c_int : 27
-SO_ERROR: c_int : 0x1007
-SO_BROADCAST: c_int : 0x0020
-IP_MULTICAST_LOOP: c_int : 11
-IPV6_MULTICAST_LOOP: c_int : 11
-IP_MULTICAST_TTL: c_int : 10
-IP_ADD_MEMBERSHIP: c_int : 12
-IP_DROP_MEMBERSHIP: c_int : 13
-IPV6_ADD_MEMBERSHIP: c_int : 12
-IPV6_DROP_MEMBERSHIP: c_int : 13
-MSG_PEEK: c_int : 0x2
-
-ip_mreq :: struct {
-	imr_multiaddr: in_addr,
-	imr_interface: in_addr,
-}
-
-ipv6_mreq :: struct {
-	ipv6mr_multiaddr: in6_addr,
-	ipv6mr_interface: c_uint,
-}
-
 VOLUME_NAME_DOS: DWORD : 0x0
 MOVEFILE_REPLACE_EXISTING: DWORD : 1
 
@@ -2369,11 +2303,6 @@ STARTUPINFO :: struct {
 	hStdError: HANDLE,
 }
 
-SOCKADDR :: struct {
-	sa_family: ADDRESS_FAMILY,
-	sa_data: [14]CHAR,
-}
-
 FILETIME :: struct {
 	dwLowDateTime: DWORD,
 	dwHighDateTime: DWORD,
@@ -2406,74 +2335,6 @@ ADDRESS_MODE :: enum c_int {
 	AddrModeFlat,
 }
 
-SOCKADDR_STORAGE_LH :: struct {
-	ss_family: ADDRESS_FAMILY,
-	__ss_pad1: [6]CHAR,
-	__ss_align: i64,
-	__ss_pad2: [112]CHAR,
-}
-
-ADDRINFOA :: struct {
-	ai_flags: c_int,
-	ai_family: c_int,
-	ai_socktype: c_int,
-	ai_protocol: c_int,
-	ai_addrlen: size_t,
-	ai_canonname: ^c_char,
-	ai_addr: ^SOCKADDR,
-	ai_next: ^ADDRINFOA,
-}
-
-PADDRINFOEXW  :: ^ADDRINFOEXW
-LPADDRINFOEXW :: ^ADDRINFOEXW
-ADDRINFOEXW :: struct {
-	ai_flags:     c_int,
-	ai_family:    c_int,
-	ai_socktype:  c_int,
-	ai_protocol:  c_int,
-	ai_addrlen:   size_t,
-	ai_canonname: wstring,
-	ai_addr:      ^sockaddr,
-	ai_blob:      rawptr,
-	ai_bloblen:   size_t,
-	ai_provider:  LPGUID,
-	ai_next:      ^ADDRINFOEXW,
-}
-
-LPLOOKUPSERVICE_COMPLETION_ROUTINE :: #type proc "stdcall" (
-	dwErrorCode: DWORD,
-	dwNumberOfBytesTransfered: DWORD,
-	lpOverlapped: LPOVERLAPPED,
-)
-
-sockaddr  :: struct {
-	sa_family: USHORT,
-	sa_data:   [14]byte,
-}
-
-sockaddr_in :: struct {
-	sin_family: ADDRESS_FAMILY,
-	sin_port: USHORT,
-	sin_addr: in_addr,
-	sin_zero: [8]CHAR,
-}
-
-sockaddr_in6 :: struct {
-	sin6_family: ADDRESS_FAMILY,
-	sin6_port: USHORT,
-	sin6_flowinfo: c_ulong,
-	sin6_addr: in6_addr,
-	sin6_scope_id: c_ulong,
-}
-
-in_addr :: struct {
-	s_addr: u32,
-}
-
-in6_addr :: struct {
-	s6_addr: [16]u8,
-}
-
 EXCEPTION_DISPOSITION :: enum c_int {
 	ExceptionContinueExecution,
 	ExceptionContinueSearch,
@@ -3884,3 +3745,233 @@ COORD :: struct {
 	X: SHORT,
 	Y: SHORT,
 }
+
+//
+// Networking
+//
+WSA_FLAG_OVERLAPPED             :: 1
+WSA_FLAG_MULTIPOINT_C_ROOT      :: 2
+WSA_FLAG_MULTIPOINT_C_LEAF      :: 4
+WSA_FLAG_MULTIPOINT_D_ROOT      :: 8
+WSA_FLAG_MULTIPOINT_D_LEAF      :: 16
+WSA_FLAG_ACCESS_SYSTEM_SECURITY :: 32
+WSA_FLAG_NO_HANDLE_INHERIT      :: 128
+WSADESCRIPTION_LEN :: 256
+WSASYS_STATUS_LEN  :: 128
+WSAPROTOCOL_LEN    :: 255
+INVALID_SOCKET :: ~SOCKET(0)
+SOMAXCONN    :: 128 // The number of messages that can be queued in memory after being received; use 2-4 for Bluetooth.
+                    // This is for the 'backlog' parameter to listen().
+SOCKET_ERROR :: -1
+
+// Networking errors
+WSAEINTR               :: 10004 // Call interrupted. CancelBlockingCall was called. (This is different on Linux.)
+WSAEACCES              :: 10013 // If you try to bind a Udp socket to the broadcast address without the socket option set.
+WSAEFAULT              :: 10014 // A pointer that was passed to a WSA function is invalid, such as a buffer size is smaller than you said it was
+WSAEINVAL              :: 10022 // Invalid argument supplied
+WSAEMFILE              :: 10024 // SOCKET handles exhausted
+WSAEWOULDBLOCK         :: 10035 // No data is ready yet
+WSAENOTSOCK            :: 10038 // Not a socket.
+WSAEINPROGRESS         :: 10036 // WS1.1 call is in progress or callback function is still being processed
+WSAEALREADY            :: 10037 // Already connecting in parallel.
+WSAEMSGSIZE            :: 10040 // Message was truncated because it exceeded max datagram size.
+WSAEPROTOTYPE          :: 10041 // Wrong protocol for the provided socket
+WSAENOPROTOOPT         :: 10042 // TODO
+WSAEPROTONOSUPPORT     :: 10043 // Protocol not supported
+WSAESOCKTNOSUPPORT     :: 10044 // Socket type not supported in the given address family
+WSAEAFNOSUPPORT        :: 10047 // Address family not supported
+WSAEOPNOTSUPP          :: 10045 // Attempt to accept on non-stream socket, etc.
+WSAEADDRINUSE          :: 10048 // Endpoint being bound is in use by another socket.
+WSAEADDRNOTAVAIL       :: 10049 // Not a valid local IP address on this computer.
+WSAENETDOWN            :: 10050 // Network subsystem failure on the local machine.
+WSAENETUNREACH         :: 10051 // The local machine is not connected to the network.
+WSAENETRESET           :: 10052 // Keepalive failure detected, or TTL exceeded when receiving UDP packets.
+WSAECONNABORTED        :: 10053 // Connection has been aborted by software in the host machine.
+WSAECONNRESET          :: 10054 // The connection was reset while trying to accept, read or write.
+WSAENOBUFS             :: 10055 // No buffer space is available. The outgoing queue may be full in which case you should probably try again after a pause.
+WSAEISCONN             :: 10056 // The socket is already connected.
+WSAENOTCONN            :: 10057 // The socket is not connected yet, or no address was supplied to sendto.
+WSAESHUTDOWN           :: 10058 // The socket has been shutdown in the direction required.
+WSAETIMEDOUT           :: 10060 // The timeout duration was reached before any data was received / before all data was sent.
+WSAECONNREFUSED        :: 10061 // The remote machine is not listening on that endpoint.
+WSAEHOSTDOWN           :: 10064 // Destination host was down.
+WSAEHOSTUNREACH        :: 10065 // The remote machine is not connected to the network.
+WSAENOTINITIALISED     :: 10093 // Needs WSAStartup call
+WSAEINVALIDPROCTABLE   :: 10104 // Invalid or incomplete procedure table was returned
+WSAEINVALIDPROVIDER    :: 10105 // Service provider version is not 2.2
+WSAEPROVIDERFAILEDINIT :: 10106 // Service provider failed to initialize
+
+// Address families
+AF_UNSPEC : c_int : 0  // Unspecified
+AF_INET   : c_int : 2  // IPv4
+AF_INET6  : c_int : 23 // IPv6
+AF_IRDA   : c_int : 26 // Infrared
+AF_BTH    : c_int : 32 // Bluetooth
+
+// Socket types
+SOCK_STREAM    : c_int : 1 // TCP
+SOCK_DGRAM     : c_int : 2 // UDP
+SOCK_RAW       : c_int : 3 // Requires options IP_HDRINCL for v4, IPV6_HDRINCL for v6, on the socket
+SOCK_RDM       : c_int : 4 // Requires "Reliable Multicast Protocol" to be installed - see WSAEnumProtocols
+SOCK_SEQPACKET : c_int : 5 // Provides psuedo-stream packet based on DGRAMs.
+
+// Protocols
+IPPROTO_IP      : c_int : 0
+IPPROTO_ICMP    : c_int : 1   // (AF_UNSPEC, AF_INET, AF_INET6) + SOCK_RAW | not specified
+IPPROTO_IGMP    : c_int : 2   // (AF_UNSPEC, AF_INET, AF_INET6) + SOCK_RAW | not specified
+BTHPROTO_RFCOMM : c_int : 3   // Bluetooth: AF_BTH + SOCK_STREAM
+IPPROTO_TCP     : c_int : 6   // (AF_INET, AF_INET6) + SOCK_STREAM
+IPPROTO_UDP     : c_int : 17  // (AF_INET, AF_INET6) + SOCK_DGRAM
+IPPROTO_ICMPV6  : c_int : 58  // (AF_UNSPEC, AF_INET, AF_INET6) + SOCK_RAW
+IPPROTO_RM      : c_int : 113 // AF_INET + SOCK_RDM [requires "Reliable Multicast Protocol" to be installed - see WSAEnumProtocols]
+
+// Shutdown manners
+SD_RECEIVE : c_int : 0
+SD_SEND    : c_int : 1
+SD_BOTH    : c_int : 2
+
+// Socket 'levels'
+SOL_SOCKET   : c_int : 0xffff // Socket options for any socket.
+IPPROTO_IPV6 : c_int : 41     // Socket options for IPV6.
+
+// Options for any sockets
+SO_ACCEPTCONN         : c_int : 0x0002
+SO_REUSEADDR          : c_int : 0x0004
+SO_KEEPALIVE          : c_int : 0x0008
+SO_SNDTIMEO           : c_int : 0x1005
+SO_RCVTIMEO           : c_int : 0x1006
+SO_EXCLUSIVEADDRUSE   : c_int : ~SO_REUSEADDR
+SO_CONDITIONAL_ACCEPT : c_int : 0x3002
+SO_DONTLINGER         : c_int : ~SO_LINGER
+SO_OOBINLINE          : c_int : 0x0100
+SO_LINGER             : c_int : 0x0080
+SO_RCVBUF             : c_int : 0x1002
+SO_SNDBUF             : c_int : 0x1001
+SO_ERROR              : c_int : 0x1007
+SO_BROADCAST          : c_int : 0x0020
+
+TCP_NODELAY: c_int : 0x0001
+IP_TTL: c_int : 4
+IPV6_V6ONLY: c_int : 27
+IP_MULTICAST_LOOP: c_int : 11
+IPV6_MULTICAST_LOOP: c_int : 11
+IP_MULTICAST_TTL: c_int : 10
+IP_ADD_MEMBERSHIP: c_int : 12
+
+IPV6_ADD_MEMBERSHIP: c_int : 12
+IPV6_DROP_MEMBERSHIP: c_int : 13
+
+MAX_PROTOCOL_CHAIN: DWORD : 7
+
+// Used with the SO_LINGER socket option to setsockopt().
+LINGER :: struct {
+	l_onoff: c.ushort,
+	l_linger: c.ushort,
+}
+// Send/Receive flags.
+MSG_OOB  : c_int : 1 // `send`/`recv` should process out-of-band data.
+MSG_PEEK : c_int : 2 // `recv` should not remove the data from the buffer. Only valid for non-overlapped operations.
+
+
+SOCKET :: distinct uintptr // TODO
+socklen_t :: c_int
+ADDRESS_FAMILY :: USHORT
+
+ip_mreq :: struct {
+	imr_multiaddr: in_addr,
+	imr_interface: in_addr,
+}
+
+ipv6_mreq :: struct {
+	ipv6mr_multiaddr: in6_addr,
+	ipv6mr_interface: c_uint,
+}
+
+SOCKADDR_STORAGE_LH :: struct {
+	ss_family: ADDRESS_FAMILY,
+	__ss_pad1: [6]CHAR,
+	__ss_align: i64,
+	__ss_pad2: [112]CHAR,
+}
+
+ADDRINFOA :: struct {
+	ai_flags: c_int,
+	ai_family: c_int,
+	ai_socktype: c_int,
+	ai_protocol: c_int,
+	ai_addrlen: size_t,
+	ai_canonname: ^c_char,
+	ai_addr: ^SOCKADDR,
+	ai_next: ^ADDRINFOA,
+}
+
+sockaddr_in :: struct {
+	sin_family: ADDRESS_FAMILY,
+	sin_port: u16be,
+	sin_addr: in_addr,
+	sin_zero: [8]CHAR,
+}
+sockaddr_in6 :: struct {
+	sin6_family: ADDRESS_FAMILY,
+	sin6_port: u16be,
+	sin6_flowinfo: c_ulong,
+	sin6_addr: in6_addr,
+	sin6_scope_id: c_ulong,
+}
+
+in_addr :: struct {
+	s_addr: u32,
+}
+
+in6_addr :: struct {
+	s6_addr: [16]u8,
+}
+
+
+DNS_STATUS :: distinct DWORD // zero is success
+DNS_INFO_NO_RECORDS :: 9501
+DNS_QUERY_NO_RECURSION :: 0x00000004
+
+DNS_RECORD :: struct {
+    pNext: ^DNS_RECORD,
+    pName: cstring,
+    wType: WORD,
+    wDataLength: USHORT,
+    Flags: DWORD,
+    dwTtl: DWORD,
+    _: DWORD,
+    Data: struct #raw_union {
+        CNAME: DNS_PTR_DATAA,
+        A: u32be, // Ipv4 Address
+        AAAA: u128be, // Ipv6 Address
+        TXT: DNS_TXT_DATAA,
+        NS: DNS_PTR_DATAA,
+        MX: DNS_MX_DATAA,
+        SRV: DNS_SRV_DATAA,
+    },
+}
+
+DNS_TXT_DATAA :: struct {
+    dwStringCount: DWORD,
+    pStringArray: cstring,
+}
+
+DNS_PTR_DATAA :: cstring
+
+DNS_MX_DATAA :: struct {
+    pNameExchange: cstring, // the hostname
+    wPreference: WORD, // lower values preferred
+    _: WORD, // padding.
+}
+DNS_SRV_DATAA :: struct {
+	pNameTarget: cstring,
+	wPriority: u16,
+	wWeight: u16,
+	wPort: u16,
+	_: WORD, // padding
+}
+
+SOCKADDR :: struct {
+	sa_family: ADDRESS_FAMILY,
+	sa_data: [14]CHAR,
+}
diff --git a/core/sys/windows/util.odin b/core/sys/windows/util.odin
index 298588cb6..7f8e51d38 100644
--- a/core/sys/windows/util.odin
+++ b/core/sys/windows/util.odin
@@ -485,3 +485,24 @@ run_as_user :: proc(username, password, application, commandline: string, pi: ^P
 		return false
 	}
 }
+
+ensure_winsock_initialized :: proc() {
+	@static gate := false
+	@static initted := false
+
+	if initted {
+		return
+	}
+
+	for intrinsics.atomic_compare_exchange_strong(&gate, false, true) {
+		intrinsics.cpu_relax()
+	}
+	defer intrinsics.atomic_store(&gate, false)
+
+	unused_info: WSADATA
+	version_requested := WORD(2) << 8 | 2
+	res := WSAStartup(version_requested, &unused_info)
+	assert(res == 0, "unable to initialized Winsock2")
+
+	initted = true
+}
diff --git a/core/sys/windows/ws2_32.odin b/core/sys/windows/ws2_32.odin
index 09af86bce..30515d430 100644
--- a/core/sys/windows/ws2_32.odin
+++ b/core/sys/windows/ws2_32.odin
@@ -54,7 +54,7 @@ foreign ws2_32 {
 		buf: rawptr,
 		len: c_int,
 		flags: c_int,
-		addr: ^SOCKADDR,
+		addr: ^SOCKADDR_STORAGE_LH,
 		addrlen: ^c_int,
 	) -> c_int ---
 	sendto :: proc(
@@ -62,11 +62,11 @@ foreign ws2_32 {
 		buf: rawptr,
 		len: c_int,
 		flags: c_int,
-		addr: ^SOCKADDR,
+		addr: ^SOCKADDR_STORAGE_LH,
 		addrlen: c_int,
 	) -> c_int ---
 	shutdown :: proc(socket: SOCKET, how: c_int) -> c_int ---
-	accept :: proc(socket: SOCKET, address: ^SOCKADDR, address_len: ^c_int) -> SOCKET ---
+	accept :: proc(socket: SOCKET, address: ^SOCKADDR_STORAGE_LH, address_len: ^c_int) -> SOCKET ---
 
 	setsockopt :: proc(
 		s: SOCKET,
@@ -75,11 +75,11 @@ foreign ws2_32 {
 		optval: rawptr,
 		optlen: c_int,
 	) -> c_int ---
-	getsockname :: proc(socket: SOCKET, address: ^SOCKADDR, address_len: ^c_int) -> c_int ---
-	getpeername :: proc(socket: SOCKET, address: ^SOCKADDR, address_len: ^c_int) -> c_int ---
-	bind :: proc(socket: SOCKET, address: ^SOCKADDR, address_len: socklen_t) -> c_int ---
+	getsockname :: proc(socket: SOCKET, address: ^SOCKADDR_STORAGE_LH, address_len: ^c_int) -> c_int ---
+	getpeername :: proc(socket: SOCKET, address: ^SOCKADDR_STORAGE_LH, address_len: ^c_int) -> c_int ---
+	bind :: proc(socket: SOCKET, address: ^SOCKADDR_STORAGE_LH, address_len: socklen_t) -> c_int ---
 	listen :: proc(socket: SOCKET, backlog: c_int) -> c_int ---
-	connect :: proc(socket: SOCKET, address: ^SOCKADDR, len: c_int) -> c_int ---
+	connect :: proc(socket: SOCKET, address: ^SOCKADDR_STORAGE_LH, len: c_int) -> c_int ---
 	getaddrinfo :: proc(
 		node: cstring,
 		service: cstring,