我不想使用boost::asio，它对我的需求来说过于复杂。
我正在开发一款跨平台的游戏，适用于台式机，iPhone和Android。
我找到了一个名为ENet的库，它几乎是我所需要的，但是它使用的UDP似乎不支持加密和其他一些功能。考虑到该游戏是事件驱动的纸牌游戏，TCP似乎是合适的选择。
但是，我发现的只是WINSOCK/berkley套接字和bost::asio。
这是带有ENet的示例客户端服务器应用程序:
#include <enet/enet.h>
#include <stdlib.h>
#include <string>
#include <iostream>
class Host
{
ENetAddress address;
ENetHost * server;
ENetHost* client;
ENetEvent event;
public:
Host()
:server(NULL)
{
enet_initialize();
setupServer();
}
void setupServer()
{
if(server)
{
enet_host_destroy(server);
server = NULL;
}
address.host = ENET_HOST_ANY;
/* Bind the server to port 1234. */
address.port = 1721;
server = enet_host_create (& address /* the address to bind the server host to */,
32 /* allow up to 32 clients and/or outgoing connections */,
2 /* allow up to 2 channels to be used, 0 and 1 */,
0 /* assume any amount of incoming bandwidth */,
0 /* assume any amount of outgoing bandwidth */);
}
void daLoop()
{
while(true)
{
/* Wait up to 1000 milliseconds for an event. */
while (enet_host_service (server, & event, 5000) > 0)
{
ENetPacket * packet;
switch (event.type)
{
case ENET_EVENT_TYPE_CONNECT:
printf ("A new client connected from %x:%u.\n",
event.peer -> address.host,
event.peer -> address.port);
/* Store any relevant client information here. */
event.peer -> data = "Client information";
/* Create a reliable packet of size 7 containing "packet\0" */
packet = enet_packet_create ("packet",
strlen ("packet") + 1,
ENET_PACKET_FLAG_RELIABLE);
/* Extend the packet so and append the string "foo", so it now */
/* contains "packetfoo\0" */
enet_packet_resize (packet, strlen ("packetfoo") + 1);
strcpy ((char*)& packet -> data [strlen ("packet")], "foo");
/* Send the packet to the peer over channel id 0. */
/* One could also broadcast the packet by */
/* enet_host_broadcast (host, 0, packet); */
enet_peer_send (event.peer, 0, packet);
/* One could just use enet_host_service() instead. */
enet_host_flush (server);
break;
case ENET_EVENT_TYPE_RECEIVE:
printf ("A packet of length %u containing %s was received from %s on channel %u.\n",
event.packet -> dataLength,
event.packet -> data,
event.peer -> data,
event.channelID);
/* Clean up the packet now that we're done using it. */
enet_packet_destroy (event.packet);
break;
case ENET_EVENT_TYPE_DISCONNECT:
printf ("%s disconected.\n", event.peer -> data);
/* Reset the peer's client information. */
event.peer -> data = NULL;
}
}
}
}
~Host()
{
if(server)
{
enet_host_destroy(server);
server = NULL;
}
atexit (enet_deinitialize);
}
};
class Client
{
ENetAddress address;
ENetEvent event;
ENetPeer *peer;
ENetHost* client;
public:
Client()
:peer(NULL)
{
enet_initialize();
setupPeer();
}
void setupPeer()
{
client = enet_host_create (NULL /* create a client host */,
1 /* only allow 1 outgoing connection */,
2 /* allow up 2 channels to be used, 0 and 1 */,
57600 / 8 /* 56K modem with 56 Kbps downstream bandwidth */,
14400 / 8 /* 56K modem with 14 Kbps upstream bandwidth */);
if (client == NULL)
{
fprintf (stderr,
"An error occurred while trying to create an ENet client host.\n");
exit (EXIT_FAILURE);
}
/* Connect to some.server.net:1234. */
enet_address_set_host (& address, "192.168.2.13");
address.port = 1721;
/* Initiate the connection, allocating the two channels 0 and 1. */
peer = enet_host_connect (client, & address, 2, 0);
if (peer == NULL)
{
fprintf (stderr,
"No available peers for initiating an ENet connection.\n");
exit (EXIT_FAILURE);
}
/* Wait up to 5 seconds for the connection attempt to succeed. */
if (enet_host_service (client, & event, 20000) > 0 &&
event.type == ENET_EVENT_TYPE_CONNECT)
{
std::cout << "Connection to some.server.net:1234 succeeded." << std::endl;
}
else
{
/* Either the 5 seconds are up or a disconnect event was */
/* received. Reset the peer in the event the 5 seconds */
/* had run out without any significant event. */
enet_peer_reset (peer);
puts ("Connection to some.server.net:1234 failed.");
}
}
void daLoop()
{
ENetPacket* packet;
/* Create a reliable packet of size 7 containing "packet\0" */
packet = enet_packet_create ("backet",
strlen ("backet") + 1,
ENET_PACKET_FLAG_RELIABLE);
/* Extend the packet so and append the string "foo", so it now */
/* contains "packetfoo\0" */
enet_packet_resize (packet, strlen ("backetfoo") + 1);
strcpy ((char*)& packet -> data [strlen ("backet")], "foo");
/* Send the packet to the peer over channel id 0. */
/* One could also broadcast the packet by */
/* enet_host_broadcast (host, 0, packet); */
enet_peer_send (event.peer, 0, packet);
/* One could just use enet_host_service() instead. */
enet_host_flush (client);
while(true)
{
/* Wait up to 1000 milliseconds for an event. */
while (enet_host_service (client, & event, 1000) > 0)
{
ENetPacket * packet;
switch (event.type)
{
case ENET_EVENT_TYPE_RECEIVE:
printf ("A packet of length %u containing %s was received from %s on channel %u.\n",
event.packet -> dataLength,
event.packet -> data,
event.peer -> data,
event.channelID);
/* Clean up the packet now that we're done using it. */
enet_packet_destroy (event.packet);
break;
}
}
}
}
~Client()
{
atexit (enet_deinitialize);
}
};
int main()
{
std::string a;
std::cin >> a;
if(a == "host")
{
Host host;
host.daLoop();
}
else
{
Client c;
c.daLoop();
}
return 0;
}
我看了一些套接字教程，它们似乎有点太低了。
我只需要一些抽象平台的东西(例如，没有WINSOCKS)，并且具有跟踪连接的客户端并向其发送消息的基本能力。
谢谢
最佳答案
回复较晚，但可能会对其他人有所帮助。
加密是高级功能。单独的TCP或UDP本身都不支持加密。它们都是低级协议(protocol)。实际上，我们可以说TCP与UDP相比是一种更高级别的协议(protocol)，因为TCP包含一些高级功能，这些功能可能有用还是无效，具体取决于要使用它的项目。
ENet之所以好，是因为它提供了两个方面的优势-TCP的可靠性以及UDP的自由度和轻量级。 ENet在内部仅使用UDP而不使用TCP的事实无可厚非，因为ENet能够提供TCP所能完成的几乎所有工作，甚至更多。
如果希望进行加密，则无论选择TCP，UDP还是ENet，都必须自己添加。因此，我建议您在对ENet感到满意的情况下继续使用ENet，并且在启动并运行游戏时，只要为客户端和服务器选择相同的加密算法，就可以添加所需的任何加密算法。您可以选择一个第三方加密库，然后将网络数据包通过该库。 ENet不在乎，通过它发送什么数据。
也许以下文章将对ENet有所帮助:
Network Programming with ENet By Mike Diehl
并查看以下有关小型网络数据包加密的Stackoverflow主题:
Best practices for encrypting continuous/small UDP data
关于c++ - 像ENet一样的库，但是用于TCP？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/10508797/