aplfw/driver/tcpip/tcpip/tcpip_open.c

   1 /**
   2  *  Hyper Operating System  Application Framework
   3  *
   4  * @file  ipether.h
   5  * @brief %jp{Ether上にIPプロトコルを実装(つまりMAC層近辺)}
   6  *
   7  * Copyright (C) 2006-2007 by Project HOS
   8  * http://sourceforge.jp/projects/hos/
   9  */
  10
  11
  12 #include <stdlib.h>
  13 #include <string.h>
  14 #include "tcpip_local.h"
  15
  16
  17 HANDLE TcpIp_Open(C_DRVOBJ *pDrvObj, const char *pszPath, int iMode)
  18 {
  19         C_TCPIP         *self;
  20         C_TCPIPFILE     *pFile;
  21
  22         /* upper cast */
  23         self = (C_TCPIP *)pDrvObj;
  24
  25         /* create file descriptor */
  26         if ( (pFile = SysMem_Alloc(sizeof(C_TCPIPFILE))) == NULL )
  27         {
  28                 return HANDLE_NULL;
  29         }
  30         ChrFile_Create(&pFile->ChrFile, pDrvObj, NULL);
  31         StreamBuf_Create(&pFile->RecvBuf, TCPIPFILE_RECV_BUFSIZE, pFile->ubRecvBuf);
  32         pFile->hEvtRecv = SysEvt_Create();
  33
  34         /* デバイスオープン処理 */
  35         if ( self->iOpenCount++ == 0 )
  36         {
  37         }
  38
  39         /* オープン処理 */
  40         if ( strncmp(pszPath, "udp:", 4) == 0 )
  41         {
  42                 /* UDPポートオープン */
  43                 pFile->iType     = TCPIPFILE_TYPE_UDP;
  44                 pFile->uhPortNum = (unsigned short)atoi(&pszPath[4]);
  45
  46                 /* リストに登録 */
  47                 if ( self->pUdpHead == NULL )
  48                 {
  49                         pFile->pNext   = pFile;
  50                         pFile->pPrev   = pFile;
  51                         self->pUdpHead = pFile;
  52                 }
  53                 else
  54                 {
  55                         pFile->pNext = self->pUdpHead;
  56                         pFile->pPrev = pFile->pPrev;
  57                         pFile->pNext->pPrev = pFile;
  58                         pFile->pPrev->pNext = pFile;
  59                 }
  60         }
  61
  62         return (HANDLE)pFile;
  63 }
  64
  65
  66 /* end of file */