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import "fmt.odin";
foreign_system_library ws2 "Ws2_32.lib" when ODIN_OS == "windows";
type SOCKET uint;
const INVALID_SOCKET = ~SOCKET(0);
type AF enum i32 {
UNSPEC = 0, // unspecified
UNIX = 1, // local to host (pipes, portals)
INET = 2, // internetwork: UDP, TCP, etc.
IMPLINK = 3, // arpanet imp addresses
PUP = 4, // pup protocols: e.g. BSP
CHAOS = 5, // mit CHAOS protocols
NS = 6, // XEROX NS protocols
ISO = 7, // ISO protocols
OSI = ISO, // OSI is ISO
ECMA = 8, // european computer manufacturers
DATAKIT = 9, // datakit protocols
CCITT = 10, // CCITT protocols, X.25 etc
SNA = 11, // IBM SNA
DECnet = 12, // DECnet
DLI = 13, // Direct data link interface
LAT = 14, // LAT
HYLINK = 15, // NSC Hyperchannel
APPLETALK = 16, // AppleTalk
ROUTE = 17, // Internal Routing Protocol
LINK = 18, // Link layer interface
XTP = 19, // eXpress Transfer Protocol (no AF)
COIP = 20, // connection-oriented IP, aka ST II
CNT = 21, // Computer Network Technology
RTIP = 22, // Help Identify RTIP packets
IPX = 23, // Novell Internet Protocol
SIP = 24, // Simple Internet Protocol
PIP = 25, // Help Identify PIP packets
MAX = 26,
};
const (
SOCK_STREAM = 1;
SOCKET_ERROR = -1;
IPPROTO_TCP = 6;
AI_PASSIVE = 0x0020;
SOMAXCONN = 128;
)
const (
SD_RECEIVE = 0;
SD_SEND = 1;
SD_BOTH = 2;
)
const WSADESCRIPTION_LEN = 256;
const WSASYS_STATUS_LEN = 128;
type WSADATA struct #ordered {
version: i16,
high_version: i16,
// NOTE(bill): This is x64 ordering
max_sockets: u16,
max_udp_dg: u16,
vendor_info: ^u8,
description: [WSADESCRIPTION_LEN+1]u8,
system_status: [WSASYS_STATUS_LEN+1]u8,
}
type addrinfo struct #ordered {
flags: i32,
family: i32,
socktype: i32,
protocol: i32,
addrlen: uint,
canonname: ^u8,
addr: ^sockaddr,
next: ^addrinfo,
}
type sockaddr struct #ordered {
family: u16,
data: [14]u8,
}
foreign ws2 {
proc WSAStartup (version_requested: i16, data: ^WSADATA) -> i32;
proc WSACleanup () -> i32;
proc getaddrinfo (node_name, service_name: ^u8, hints: ^addrinfo, result: ^^addrinfo) -> i32;
proc freeaddrinfo (ai: ^addrinfo);
proc socket (af, type_, protocol: i32) -> SOCKET;
proc closesocket (s: SOCKET) -> i32;
proc bind (s: SOCKET, name: ^sockaddr, name_len: i32) -> i32;
proc listen (s: SOCKET, back_log: i32) -> i32;
proc accept (s: SOCKET, addr: ^sockaddr, addr_len: i32) -> SOCKET;
proc recv (s: SOCKET, buf: ^u8, len: i32, flags: i32) -> i32;
proc send (s: SOCKET, buf: ^u8, len: i32, flags: i32) -> i32;
proc shutdown (s: SOCKET, how: i32) -> i32;
proc WSAGetLastError() -> i32;
}
proc to_c_string(s: string) -> ^u8 {
var c_str = make([]u8, len(s)+1);
copy(c_str, []u8(s));
c_str[len(s)] = 0;
return &c_str[0];
}
proc run() {
var (
wsa: WSADATA;
res: ^addrinfo = nil;
hints: addrinfo;
s, client: SOCKET;
)
if WSAStartup(2 | (2 << 8), &wsa) != 0 {
fmt.println("WSAStartup failed: ", WSAGetLastError());
return;
}
defer WSACleanup();
hints.family = i32(AF.INET);
hints.socktype = SOCK_STREAM;
hints.protocol = IPPROTO_TCP;
hints.flags = AI_PASSIVE;
if getaddrinfo(nil, to_c_string("8080"), &hints, &res) != 0 {
fmt.println("getaddrinfo failed: ", WSAGetLastError());
return;
}
defer freeaddrinfo(res);
s = socket(res.family, res.socktype, res.protocol);
if s == INVALID_SOCKET {
fmt.println("socket failed: ", WSAGetLastError());
return;
}
defer closesocket(s);
bind(s, res.addr, i32(res.addrlen));
listen(s, SOMAXCONN);
client = accept(s, nil, 0);
if client == INVALID_SOCKET {
fmt.println("socket failed: ", WSAGetLastError());
return;
}
defer closesocket(client);
var html =
`HTTP/1.1 200 OK
Connection: close
Content-type: text/html
<html>
<head>
<title>Demo Title</title>
</head>
<body>
<h1 style="color: orange;">Odin Server Demo</h1>
</body>
</html>
`;
var buf: [1024]u8;
for {
var bytes = recv(client, &buf[0], i32(len(buf)), 0);
if bytes > 0 {
// fmt.println(string(buf[0..<bytes]))
var bytes_sent = send(client, &html[0], i32(len(html)-1), 0);
if bytes_sent == SOCKET_ERROR {
fmt.println("send failed: ", WSAGetLastError());
return;
}
break;
} else if bytes == 0 {
fmt.println("Connection closing...");
break;
} else {
fmt.println("recv failed: ", WSAGetLastError());
return;
}
}
shutdown(client, SD_SEND);
}
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