Usermode/Applications/axwin3_src/libaxwin3.so_src/msg.c

   1 /*
   2  * AxWin3 Interface Library
   3  * - By John Hodge (thePowersGang)
   4  *
   5  * msg.c
   6  * - Message handling / IPC
   7  */
   8 #include <axwin3/axwin.h>
   9 #include <acess/sys.h>
  10 #include <string.h>
  11 #include <stdlib.h>
  12 #include "include/ipc.h"
  13 #include "include/internal.h"
  14
  15 // === CONSTANTS ===
  16 enum eConnectionType
  17 {
  18         CONNTYPE_SENDMESSAGE,
  19         CONNTYPE_UDP,
  20         CONNTYPE_TCP
  21 };
  22
  23 // === GLOBALS ===
  24 enum eConnectionType    giConnectionType;
  25 int     giConnectionNum;        // FD or PID
  26 char    gaAxWin3_int_UDPHeader[] = {5,16,0,0};  // Port 4101
  27  int    giAxWin3_int_UDPHeaderLen = sizeof(gaAxWin3_int_UDPHeader);
  28 const char      *gsAxWin3_int_ServerDesc;
  29 tAxWin3_MessageCallback gAxWin3_MessageCallback;
  30
  31 // === CODE ===
  32 void AxWin3_Connect(const char *ServerDesc)
  33 {
  34         _SysDebug("ServerDesc = %s", ServerDesc);
  35         if( !ServerDesc )
  36         {
  37                 ServerDesc = gsAxWin3_int_ServerDesc;
  38         }
  39         _SysDebug("ServerDesc = %s", ServerDesc);
  40         if( !ServerDesc )
  41         {
  42                 // TODO: Error out
  43                 return ;
  44         }
  45         switch(ServerDesc[0])
  46         {
  47         case '1': case '2': case '3': case '4': case '5':
  48         case '6': case '7': case '8': case '9': case '0':
  49                 giConnectionType = CONNTYPE_SENDMESSAGE;
  50                 giConnectionNum = atoi(ServerDesc);
  51                 break;
  52         case 'u':
  53                 while(*ServerDesc && *ServerDesc != ':')        ServerDesc ++;
  54                 ServerDesc ++;
  55                 // TODO: Open socket and create UDP header
  56                 break;
  57         case 't':
  58                 while(*ServerDesc && *ServerDesc != ':')        ServerDesc ++;
  59                 ServerDesc ++;
  60                 // TODO: Open socket
  61                 break;
  62         }
  63 }
  64
  65 tAxWin3_MessageCallback AxWin3_SetMessageCallback(tAxWin3_MessageCallback Callback)
  66 {
  67         tAxWin3_MessageCallback old = gAxWin3_MessageCallback;
  68         gAxWin3_MessageCallback = Callback;
  69         return old;
  70 }
  71
  72 tAxWin_IPCMessage *AxWin3_int_AllocateIPCMessage(tHWND Window, int Message, int Flags, int ExtraBytes)
  73 {
  74         tAxWin_IPCMessage       *ret;
  75
  76         ret = malloc( sizeof(tAxWin_IPCMessage) + ExtraBytes );
  77         ret->Flags = Flags;
  78         ret->ID = Message;
  79         if(Window)
  80                 ret->Window = Window->ServerID;
  81         else
  82                 ret->Window = -1;
  83         ret->Size = ExtraBytes;
  84         return ret;
  85 }
  86
  87 void AxWin3_int_SendIPCMessage(tAxWin_IPCMessage *Msg)
  88 {
  89          int    size = sizeof(tAxWin_IPCMessage) + Msg->Size;
  90         switch(giConnectionType)
  91         {
  92         case CONNTYPE_SENDMESSAGE:
  93                 SysSendMessage(giConnectionNum, size, Msg);
  94                 break;
  95         case CONNTYPE_UDP: {
  96                 // Create UDP header
  97                 char    tmpbuf[giAxWin3_int_UDPHeaderLen + size];
  98                 memcpy(tmpbuf, gaAxWin3_int_UDPHeader, giAxWin3_int_UDPHeaderLen);
  99                 memcpy(tmpbuf + giAxWin3_int_UDPHeaderLen, Msg, size);
 100                 write(giConnectionNum, tmpbuf, sizeof(tmpbuf));
 101                 }
 102                 break;
 103         case CONNTYPE_TCP:
 104                 write(giConnectionNum, Msg, size);
 105                 break;
 106         default:
 107                 break;
 108         }
 109 }
 110
 111 tAxWin_IPCMessage *AxWin3_int_GetIPCMessage(void)
 112 {
 113          int    len;
 114         tAxWin_IPCMessage       *ret = NULL;
 115         switch(giConnectionType)
 116         {
 117         case CONNTYPE_SENDMESSAGE:
 118                 // TODO: Less hack, I need a version of select for GetMessage etc
 119                 if(SysGetMessage(NULL, NULL) == 0)      sleep();
 120                 while(SysGetMessage(NULL, NULL))
 121                 {
 122                         pid_t   tid;
 123                         len = SysGetMessage(&tid, NULL);
 124                         // Check if the message came from the server
 125                         if(tid != giConnectionNum)
 126                         {
 127                                 // If not, pass the buck (or ignore)
 128                                 if( gAxWin3_MessageCallback )
 129                                         gAxWin3_MessageCallback(tid, len);
 130                                 else
 131                                         SysGetMessage(NULL, GETMSG_IGNORE);
 132                                 continue ;
 133                         }
 134
 135                         // If it's from the server, allocate a buffer and return it
 136                         ret = malloc(len);
 137                         if(ret == NULL) return NULL;
 138                         SysGetMessage(NULL, ret);
 139                         break;
 140                 }
 141                 break;
 142         default:
 143                 // TODO: Implement
 144                 _SysDebug("TODO: Implement AxWin3_int_GetIPCMessage for TCP/UDP");
 145                 break;
 146         }
 147
 148         // No message?
 149         if( ret == NULL )
 150                 return NULL;
 151
 152         // TODO: Sanity checks, so a stupid server can't crash us
 153
 154         return ret;
 155 }
 156