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 static void cl_update_svbullet(ProtocolMessage m) {
  42         g_bullet_set(
  43                 m.sv.sbul.id,
  44                 m.sv.sbul.owner,
  45                 m.sv.sbul.live,
  46                 b2f(m.sv.sbul.x),
  47                 b2f(m.sv.sbul.y),
  48                 b2f(m.sv.sbul.vx),
  49                 b2f(m.sv.sbul.vy),
  50                 m.sv.sbul.tick
  51         );
  52 }
  53
  54 void cl_connect(const char * host, uint16_t port) {
  55         if(SDLNet_ResolveHost(&addr, host, (port) ? (port) : (DEFAULT_PORT)) != 0) {
  56                 SDL_Log("Unable to resolve host: %s\n", SDLNet_GetError());
  57                 exit(1);
  58         }
  59
  60         sock = OpenPort(0);
  61         SendMessage(sock, addr, cl_info(nickname));
  62
  63         ProtocolMessage m;
  64         bool received = WaitMessage(sock, NULL, &m, 10000);
  65         if(!received) {
  66                 SDL_Log("Connection timeout");
  67                 exit(1);
  68         }
  69
  70         run = true;
  71         if(m.type == SV_KILL) {
  72                 cl_kill_client(m);
  73         } else if(m.type == SV_INFO) {
  74                 cl_update_svinfo(m);
  75         } else {
  76                 SDL_Log("Invalid first message %i\n", m.type);
  77                 run = false;
  78         }
  79 }
  80
  81 void cl_move(DoesCode code) {
  82         g_player_does(cl_playerid, code);
  83         SendMessage(sock, addr, cl_does(code));
  84 }
  85
  86 void cl_recv() {
  87         IPaddress address;
  88         ProtocolMessage m;
  89         if(!RecvMessage(sock, &address, &m))
  90                 return;
  91
  92         switch(m.type) {
  93         case SV_INFO: cl_update_svinfo(m); break;
  94         case SV_KILL: cl_kill_client(m); break;
  95         case SV_SPLR: cl_update_svplayer(m); break;
  96         case SV_SBUL: cl_update_svbullet(m); break;
  97         default:      SDL_Log("invalid message %i", m.type);
  98         }
  99 }
 100
 101 void cl_disconnect(bool force) {
 102         if(!run)
 103                 return;
 104
 105         if(!force)
 106                 SendMessage(sock, addr, cl_kill());
 107
 108         ClosePort(sock);
 109
 110         run = false;
 111 }
 112
 113 bool cl_isrun() {
 114         return run;
 115 }