[ENet-discuss] Simple chat example
Shafqat Bhuiyan
priomsrb at gmail.com
Thu Nov 11 15:46:37 PST 2010
Yeah the tutorial is quite nice. But having a totally working sample
is good to check against when your program doesn't work.
I hope the developers of ENet would also make some simple sample
programs in future releases.
On Fri, Nov 12, 2010 at 12:47 AM, fuzzy spoon <fuzzyspoon at gmail.com> wrote:
> The tutorials are more than enough usually (as you just experienced).
> I think samples are a good idea, though. They would just need to be a lot
> more documented and clearer code imo :)
>
> On Thu, Nov 11, 2010 at 1:41 PM, Shafqat Bhuiyan <priomsrb at gmail.com> wrote:
>>
>> Thanks.
>>
>> It'd be great if there was an examples page on the website or maybe a
>> samples directory in the source distribution so it's easier for people
>> to learn.
>>
>> On Thu, Nov 11, 2010 at 11:28 PM, fuzzy spoon <fuzzyspoon at gmail.com>
>> wrote:
>> > Thanks for taking the time to make an example :)
>> > Im sure it will help someone along the way.
>> > On Thu, Nov 11, 2010 at 12:21 PM, Shafqat Bhuiyan <priomsrb at gmail.com>
>> > wrote:
>> >>
>> >> Hi,
>> >>
>> >> I was looking around for some example programs that use enet
>> >> but like others I couldn't find one. So I tried to make one myself.
>> >>
>> >> This is a simple chat program. Multiple clients can join the server
>> >> and write messages. Messages will be received by all clients
>> >> (including the one that sent it).
>> >>
>> >> Most of the code is a direct copy/paste from the enet tutorial. The
>> >> code is definitely not perfect but is suitable for a beginner to look
>> >> around in.
>> >>
>> >>
>> >>
>> >> /* server.cpp */
>> >> #include <stdio.h>
>> >> #include <enet/enet.h>
>> >>
>> >> int main (int argc, char *argv[])
>> >> {
>> >> ENetAddress address;
>> >> ENetHost *server;
>> >> ENetEvent event;
>> >> int serviceResult;
>> >>
>> >> puts ("Starting server");
>> >>
>> >> if (enet_initialize () != 0)
>> >> {
>> >> puts ("Error initialising enet");
>> >> exit (EXIT_FAILURE);
>> >> }
>> >>
>> >>
>> >> /* Bind the server to the default localhost. */
>> >> /* A specific host address can be specified by */
>> >> /* enet_address_set_host (& address, "x.x.x.x"); */
>> >> address.host = ENET_HOST_ANY;
>> >> /* Bind the server to port 1234. */
>> >> address.port = 1234;
>> >>
>> >> server = enet_host_create (&address,
>> >> 32, /* number of clients */
>> >> 2, /* number of channels */
>> >> 0, /* Any incoming bandwith */
>> >> 0); /* Any outgoing bandwith */
>> >>
>> >> if (server == NULL)
>> >> {
>> >> puts ("Could not create server host");
>> >> exit (EXIT_FAILURE);
>> >> }
>> >>
>> >>
>> >> while (true)
>> >> {
>> >> serviceResult = 1;
>> >>
>> >> /* Keep doing host_service until no events are left */
>> >> while (serviceResult > 0)
>> >> {
>> >> /* Wait up to 1000 milliseconds for an event. */
>> >> serviceResult = enet_host_service (server, &event, 1000);
>> >>
>> >> if (serviceResult > 0)
>> >> {
>> >>
>> >> 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 = (void*)"Client information";
>> >>
>> >> 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);
>> >>
>> >> /* Tell all clients about this message */
>> >> enet_host_broadcast (server, 0, 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;
>> >>
>> >> break;
>> >> }
>> >> }
>> >> else if (serviceResult > 0)
>> >> {
>> >> puts ("Error with servicing the server");
>> >> exit (EXIT_FAILURE);
>> >> }
>> >> }
>> >>
>> >> }
>> >>
>> >> enet_host_destroy (server);
>> >> enet_deinitialize ();
>> >>
>> >> return 0;
>> >>
>> >> }
>> >>
>> >>
>> >>
>> >> /************************************************/
>> >>
>> >>
>> >>
>> >> /* client.cpp */
>> >> #include <stdio.h>
>> >> #include <string.h>
>> >> #include <enet/enet.h>
>> >>
>> >>
>> >> int main (int argc, char* argv[]) {
>> >> ENetHost *client;
>> >> ENetAddress address;
>> >> ENetPeer *peer;
>> >> ENetEvent event;
>> >> char message[1024];
>> >> int serviceResult;
>> >>
>> >> puts ("Starting client");
>> >>
>> >> if (enet_initialize () != 0) {
>> >> fprintf (stderr, "Error initialising enet");
>> >> exit (EXIT_FAILURE);
>> >> }
>> >>
>> >> client = enet_host_create (NULL, /* create a client host */
>> >> 1, /* number of clients */
>> >> 2, /* number of channels */
>> >> 57600 / 8, /* incoming bandwith */
>> >> 14400 / 8); /* outgoing bandwith */
>> >>
>> >> if (client == NULL) {
>> >> fprintf (stderr, "Could not create client host");
>> >> exit (EXIT_FAILURE);
>> >> }
>> >>
>> >>
>> >> enet_address_set_host (&address, "localhost");
>> >> address.port = 1234;
>> >>
>> >> peer = enet_host_connect (client,
>> >> &address, /* address to connect to */
>> >> 2, /* number of channels */
>> >> 0); /* user data supplied to
>> >> the receiving host */
>> >>
>> >> if (peer == NULL) {
>> >> fprintf (stderr, "No available peers for initiating an ENet "
>> >> "connection.\n");
>> >> exit (EXIT_FAILURE);
>> >> }
>> >>
>> >>
>> >> /* Try to connect to server within 5 seconds */
>> >> if (enet_host_service (client, &event, 5000) > 0 &&
>> >> event.type == ENET_EVENT_TYPE_CONNECT)
>> >> {
>> >> puts ("Connection to server succeeded.");
>> >> }
>> >> 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);
>> >>
>> >> fprintf (stderr, "Connection to server failed.");
>> >> exit (EXIT_FAILURE);
>> >> }
>> >>
>> >> while (true)
>> >> {
>> >> serviceResult = 1;
>> >>
>> >> /* Keep doing host_service until no events are left */
>> >> while (serviceResult > 0)
>> >> {
>> >> serviceResult = enet_host_service (client, &event, 0);
>> >>
>> >> if (serviceResult > 0)
>> >> {
>> >> 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);
>> >>
>> >> event.peer->data = (void*)"New User";
>> >> 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);
>> >>
>> >> break;
>> >> }
>> >> }
>> >> else if (serviceResult > 0)
>> >> {
>> >> puts ("Error with servicing the client");
>> >> exit (EXIT_FAILURE);
>> >> }
>> >>
>> >> }
>> >>
>> >>
>> >> printf ("Say> ");
>> >> gets (message);
>> >>
>> >> if (strcmp (message, "exit") == 0 ||
>> >> strcmp (message, "quit") == 0) {
>> >> break;
>> >> }
>> >>
>> >> if(strlen(message) > 0) {
>> >> ENetPacket *packet = enet_packet_create (message, strlen
>> >> (message) + 1, ENET_PACKET_FLAG_RELIABLE);
>> >> enet_peer_send (peer, 0, packet);
>> >> }
>> >>
>> >> }
>> >>
>> >> enet_peer_disconnect (peer, 0);
>> >>
>> >> /* Allow up to 3 seconds for the disconnect to succeed */
>> >> /* and drop any packets received packets */
>> >> while (enet_host_service (client, & event, 3000) > 0)
>> >> {
>> >>
>> >> switch (event.type)
>> >> {
>> >> case ENET_EVENT_TYPE_RECEIVE:
>> >> enet_packet_destroy (event.packet);
>> >> break;
>> >>
>> >> case ENET_EVENT_TYPE_DISCONNECT:
>> >> puts ("Disconnection succeeded.");
>> >> break;
>> >> }
>> >> }
>> >>
>> >>
>> >> enet_host_destroy (client);
>> >> enet_deinitialize ();
>> >>
>> >> return 0;
>> >>
>> >> }
>> >> _______________________________________________
>> >> ENet-discuss mailing list
>> >> ENet-discuss at cubik.org
>> >> http://lists.cubik.org/mailman/listinfo/enet-discuss
>> >
>> >
>> > _______________________________________________
>> > ENet-discuss mailing list
>> > ENet-discuss at cubik.org
>> > http://lists.cubik.org/mailman/listinfo/enet-discuss
>> >
>> >
>> _______________________________________________
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>> http://lists.cubik.org/mailman/listinfo/enet-discuss
>
>
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