client.c

   1 #include <assert.h>
   2 #include <SDL2/SDL_net.h>
   3
   4 #include "game.h"
   5 #include "client.h"
   6 #include "network.h"
   7 #include "protocol.h"
   8
   9 int cl_playerid;
  10
  11 static bool      run;
  12 static IPaddress addr;
  13 static UDPsocket sock;
  14 static char      nickname[32] = "Anonymous";
  15
  16 static void cl_kill_client(ProtocolMessage m) {
  17         SDL_Log("Connection refused by server: %.*s\n", (int) sizeof(m.sv.kill.message), m.sv.kill.message);
  18         cl_disconnect(true);
  19 }
  20
  21 static void cl_update_svinfo(ProtocolMessage m) {
  22         SDL_Log("Connected to server %.*s\n", (int) sizeof(m.sv.info.name), m.sv.info.name);
  23         cl_playerid = m.sv.info.clientid;
  24         assert(cl_playerid < MAX_PLAYERS);
  25         SDL_Log("Player id%i\n", cl_playerid);
  26 }
  27
  28 static void cl_update_svplayer(ProtocolMessage m) {
  29         g_player_set(
  30                 m.sv.splr.clid,
  31                 m.sv.splr.live,
  32                 b2f(m.sv.splr.x),
  33                 b2f(m.sv.splr.y),
  34                 b2f(m.sv.splr.r),
  35                 b2f(m.sv.splr.vx),
  36                 b2f(m.sv.splr.vy),
  37                 b2f(m.sv.splr.vr)
  38         );
  39 }
  40
  41 void cl_connect(const char * host, uint16_t port) {
  42         if(SDLNet_ResolveHost(&addr, host, (port) ? (port) : (DEFAULT_PORT)) != 0) {
  43                 SDL_Log("Unable to resolve host: %s\n", SDLNet_GetError());
  44                 exit(1);
  45         }
  46
  47         sock = OpenPort(0);
  48         SendMessage(sock, addr, cl_info(nickname));
  49
  50         ProtocolMessage m;
  51         bool received = WaitMessage(sock, NULL, &m, 10000);
  52         if(!received) {
  53                 SDL_Log("Connection timeout");
  54                 exit(1);
  55         }
  56
  57         run = true;
  58         if(m.type == SV_KILL) {
  59                 cl_kill_client(m);
  60         } else if(m.type == SV_INFO) {
  61                 cl_update_svinfo(m);
  62         } else {
  63                 SDL_Log("Invalid first message %i\n", m.type);
  64                 run = false;
  65         }
  66 }
  67
  68 void cl_move(DoesCode code) {
  69         g_player_does(cl_playerid, code);
  70         SendMessage(sock, addr, cl_does(code));
  71 }
  72
  73 void cl_recv() {
  74         IPaddress address;
  75         ProtocolMessage m;
  76         if(!RecvMessage(sock, &address, &m))
  77                 return;
  78
  79         switch(m.type) {
  80         case SV_INFO: cl_update_svinfo(m); break;
  81         case SV_KILL: cl_kill_client(m); break;
  82         case SV_SPLR: cl_update_svplayer(m); break;
  83         default:      SDL_Log("invalid message %i", m.type);
  84         }
  85 }
  86
  87 void cl_disconnect(bool force) {
  88         if(!run)
  89                 return;
  90
  91         if(!force)
  92                 SendMessage(sock, addr, cl_kill());
  93
  94         ClosePort(sock);
  95
  96         run = false;
  97 }
  98
  99 bool cl_isrun() {
 100         return run;
 101 }