static void do_accept (SOCKET sock)
{
const int index = NET_StreamGetFree();
if (index == -1) {
Com_Printf("Too many streams open, rejecting inbound connection\n");
netCloseSocket(sock);
return;
}
struct net_stream* s = NET_StreamNew(index);
s->socket = sock;
s->inbound = dbufferptr(new dbuffer(4096));
s->outbound = dbufferptr(new dbuffer(4096));
s->family = server_family;
s->addrlen = server_addrlen;
s->func = server_func;
maxfd = std::max(sock + 1, maxfd);
FD_SET(sock, &read_fds);
server_func(s);
/** @todo close stream? */
}
static struct net_stream* NET_DoConnect (const char* node, const char* service, const struct addrinfo* addr, int i, stream_onclose_func* onclose)
{
struct net_stream* s;
SOCKET sock = socket(addr->ai_family, addr->ai_socktype, addr->ai_protocol);
if (sock == INVALID_SOCKET) {
Com_Printf("Failed to create socket: %s\n", netStringError(netError));
return nullptr;
}
if (!NET_SocketSetNonBlocking(sock)) {
netCloseSocket(sock);
return nullptr;
}
if (connect(sock, addr->ai_addr, addr->ai_addrlen) != 0) {
const int err = netError;
#ifdef _WIN32
if (err != WSAEWOULDBLOCK) {
#else
if (err != EINPROGRESS) {
#endif
Com_Printf("Failed to start connection to %s:%s: %s\n", node, service, netStringError(err));
netCloseSocket(sock);
return nullptr;
}
}
s = NET_StreamNew(i);
s->socket = sock;
s->inbound = dbufferptr(new dbuffer(4096));
s->outbound = dbufferptr(new dbuffer(4096));
s->family = addr->ai_family;
s->addrlen = addr->ai_addrlen;
s->onclose = onclose;
maxfd = std::max(sock + 1, maxfd);
FD_SET(sock, &read_fds);
return s;
}
/**
* @brief Try to connect to a given host on a given port
* @param[in] node The host to connect to
* @param[in] service The port to connect to
* @param[in] onclose The callback that is called on closing the returned stream. This is useful if
* you hold the pointer for the returned stream anywhere else and would like to get notified once
* this pointer is invalid.
* @sa NET_DoConnect
* @sa NET_ConnectToLoopBack
* @todo What about a timeout
*/
struct net_stream* NET_Connect (const char* node, const char* service, stream_onclose_func* onclose)
{
struct addrinfo* res;
struct addrinfo hints;
int rc;
struct net_stream* s = nullptr;
int index;
OBJZERO(hints);
hints.ai_flags = AI_ADDRCONFIG | AI_NUMERICSERV;
hints.ai_socktype = SOCK_STREAM;
/* force ipv4 */
if (net_ipv4->integer)
hints.ai_family = AF_INET;
rc = getaddrinfo(node, service, &hints, &res);
if (rc != 0) {
Com_Printf("Failed to resolve host %s:%s: %s\n", node, service, gai_strerror(rc));
return nullptr;
}
index = NET_StreamGetFree();
if (index == -1) {
Com_Printf("Failed to connect to host %s:%s, too many streams open\n", node, service);
freeaddrinfo(res);
return nullptr;
}
s = NET_DoConnect(node, service, res, index, onclose);
freeaddrinfo(res);
return s;
}
/**
* @param[in] onclose The callback that is called on closing the returned stream. This is useful if
* you hold the pointer for the returned stream anywhere else and would like to get notified once
* this pointer is invalid.
* @sa NET_Connect
*/
struct net_stream* NET_ConnectToLoopBack (stream_onclose_func* onclose)
{
struct net_stream* client, *server;
int server_index, client_index;
if (!server_running)
return nullptr;
server_index = NET_StreamGetFree();
client_index = NET_StreamGetFree();
if (server_index == -1 || client_index == -1 || server_index == client_index) {
Com_Printf("Failed to connect to loopback server, too many streams open\n");
return nullptr;
}
client = NET_StreamNew(client_index);
client->loopback = true;
client->inbound = dbufferptr(new dbuffer(4096));
client->outbound = dbufferptr(new dbuffer(4096));
client->onclose = onclose;
server = NET_StreamNew(server_index);
server->loopback = true;
server->inbound = client->outbound;
server->outbound = client->inbound;
server->func = server_func;
server->onclose = nullptr;
client->loopback_peer = server;
server->loopback_peer = client;
server_func(server);
return client;
}
/**
* @brief Enqueue a network message into a stream
* @sa NET_StreamDequeue
*/
void NET_StreamEnqueue (struct net_stream* s, const char* data, int len)
{
if (len <= 0 || !s || s->closed || s->finished)
return;
if (s->outbound) {
const ScopedMutex scopedMutex(netMutex);
s->outbound->add(data, len);
}
/* on linux, socket is int, and INVALID_SOCKET -1
* on windows it is unsigned and INVALID_SOCKET (~0)
* Let's hope that checking for INVALID_SOCKET is good enough for linux. */
//if (s->socket >= 0)
if (s->socket != INVALID_SOCKET)
FD_SET(s->socket, &write_fds);
if (s->loopback_peer) {
loopback_ready = true;
s->loopback_peer->ready = true;
}
}
/**
* @brief Returns the length of the waiting inbound buffer
*/
static int NET_StreamPeek (struct net_stream* s, char* data, int len)
{
if (len <= 0 || !s)
return 0;
dbufferptr& dbuf = s->inbound;
if ((s->closed || s->finished) && dbuffer_len(dbuf) == 0)
return 0;
return dbuf->get(data, len);
}
/**
* @sa NET_StreamEnqueue
*/
int NET_StreamDequeue (struct net_stream* s, char* data, int len)
{
if (len <= 0 || !s || s->finished)
return 0;
return s->inbound->extract(data, len);
}
/**
* @brief Reads messages from the network channel and adds them to the dbuffer
* where you can use the NET_Read* functions to get the values in the correct
* order
* @sa NET_StreamDequeue
*/
dbuffer* NET_ReadMsg (struct net_stream* s)
{
unsigned int v;
const ScopedMutex scopedMutex(netMutex);
if (NET_StreamPeek(s, (char*)&v, 4) < 4)
return nullptr;
int len = LittleLong(v);
if (NET_StreamGetLength(s) < (4 + len))
return nullptr;
char tmp[256];
const int size = sizeof(tmp);
NET_StreamDequeue(s, tmp, 4);
dbuffer* buf = new dbuffer();
while (len > 0) {
const int x = NET_StreamDequeue(s, tmp, std::min(len, size));
buf->add(tmp, x);
len -= x;
}
return buf;
}