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#include "stdafx.h"
#include "NetStream.h"
#if defined(WINDOWS)
#include <mstcpip.h> // for tcp_keepalive
#endif
namespace storm {
void Keepalive::toS(StrBuf *to) const {
if (!enabled) {
*to << S("<keepalive off>");
} else if (idle.v <= 0 || interval.v <= 0) {
*to << S("<keepalive on, default times>");
} else {
*to << S("<keepalive on, idle: ") << idle << S(", interval: ") << interval << S(">");
}
}
NetStream::NetStream(os::Handle handle, os::Thread attachedTo, Address *peer)
: Socket(handle, attachedTo), closed(0), peer(peer) {
i = new (this) NetIStream(this, attachedTo);
o = new (this) NetOStream(this, attachedTo);
}
void NetStream::deepCopy(CloneEnv *env) {
cloned(i, env);
cloned(o, env);
}
NetIStream *NetStream::input() const {
return i;
}
NetOStream *NetStream::output() const {
return o;
}
Bool NetStream::nodelay() const {
int v = 0;
getSocketOpt(handle, IPPROTO_TCP, TCP_NODELAY, &v, sizeof(v));
return v != 0;
}
void NetStream::nodelay(Bool v) {
int val = v ? 1 : 0;
setSocketOpt(handle, IPPROTO_TCP, TCP_NODELAY, &val, sizeof(val));
}
Keepalive NetStream::keepalive() const {
return alive;
}
#if defined(WINDOWS)
void NetStream::keepalive(Keepalive d) {
alive = d;
Bool ok = false;
if (!alive.enabled) {
// Just turn it off with a setsockopt.
int enabled = 1;
ok = setSocketOpt(handle, SOL_SOCKET, SO_KEEPALIVE, &enabled, sizeof(enabled));
} else if (alive.enabled && !alive.defaultTimes()) {
// Just turn it on with a setsockopt.
int enabled = 0;
ok = setSocketOpt(handle, SOL_SOCKET, SO_KEEPALIVE, &enabled, sizeof(enabled));
} else {
// Set times also:
tcp_keepalive info = {
1,
ULONG(alive.idle.inMs()),
ULONG(alive.interval.inMs()),
};
DWORD out = 0;
int res = WSAIoctl((SOCKET)handle.v(), SIO_KEEPALIVE_VALS,
&info, sizeof(info), // input
NULL, NULL, &out, // no output
NULL, NULL); // not OVERLAPPED
ok = res == 0;
}
if (!ok)
throw new (this) NetError(S("Failed to set keepalive information."));
}
#elif defined(LINUX)
void NetStream::keepalive(Keepalive d) {
alive = d;
int enabled = alive.enabled ? 1 : 0;
if (!setSocketOpt(handle, SOL_SOCKET, SO_KEEPALIVE, &enabled, sizeof(enabled)))
throw new (this) NetError(S("Failed to set SO_KEEPALIVE."));
if (alive.enabled && !alive.defaultTimes()) {
int idletime = alive.idle.inS();
int idleinterval = alive.interval.inS();
if (!setSocketOpt(handle, SOL_TCP, TCP_KEEPIDLE, &idletime, sizeof(idletime)))
throw new (this) NetError(S("Failed to set TCP_KEEPIDLE."));
if (!setSocketOpt(handle, SOL_TCP, TCP_KEEPINTVL, &idleinterval, sizeof(idleinterval)))
throw new (this) NetError(S("Failed to set TCP_KEEPINTVL."));
}
}
#else
#error "TODO: Implement keepalive for your OS."
#endif
void NetStream::close() {
i->close();
o->close();
}
void NetStream::closeEnd(Nat which) {
Nat old, w;
do {
old = atomicRead(closed);
w = old | which;
} while (atomicCAS(closed, old, w) != old);
if (w == (closeRead | closeWrite) && handle) {
closeSocket(handle, attachedTo);
handle = os::Handle();
}
}
void NetStream::toS(StrBuf *to) const {
Socket::toS(to);
if (handle)
*to << S(" <-> ") << peer;
}
/**
* Connect.
*/
MAYBE(NetStream *) connect(Address *to) {
initSockets();
sockaddr_storage data;
sockaddr *sa = (sockaddr *)&data;
to->fill(sa);
os::Handle h = createTcpSocket(sa->sa_family);
os::Thread current = os::Thread::current();
current.attach(h);
try {
// Connect!
bool ok = connectSocket(h, current, sa, sizeof(data));
if (!ok)
return null;
return new (to) NetStream(h, current, to);
} catch (...) {
closeSocket(h, current);
throw;
}
}
MAYBE(NetStream *) connect(Str *host, Nat port) {
Array<Address *> *found = lookupAddress(host);
for (Nat i = 0; i < found->count(); i++) {
Address *addr = found->at(i);
if (!addr->port())
addr = addr->withPort(port);
if (NetStream *s = connect(addr))
return s;
}
return null;
}
/**
* IStream.
*/
NetIStream::NetIStream(NetStream *owner, const os::Thread &t)
: HandleTimeoutIStream(owner->handle, t), owner(owner) {
skipClose();
skipPos();
}
NetIStream::~NetIStream() {
// The socket will close the handle.
handle = os::Handle();
}
void NetIStream::close() {
handle = os::Handle();
owner->closeEnd(NetStream::closeRead);
}
/**
* OStream.
*/
NetOStream::NetOStream(NetStream *owner, const os::Thread &t)
: HandleTimeoutOStream(owner->handle, t), owner(owner) {
skipClose();
skipPos();
}
NetOStream::~NetOStream() {
// The socket will close the handle.
handle = os::Handle();
}
void NetOStream::close() {
handle = os::Handle();
owner->closeEnd(NetStream::closeWrite);
}
}
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