랜케이블이 단락시 tcpip 연결 상태값 문의

shlee7151 · 2014-03-24T06:55:15+09:00

TCPIP SERVER 로 구현된 w5100 입니다. 문의 사항은 STRESS TEST 진행중, TCPIP 연결된 getSn_SR(ch) 값의 SOCK_ESTABLISHED (CONNECT) 상태에서 물리적으로 랜 케이블을 뺏을때 getSn_SR(ch) 함수가 SOCKET SESSION DISCONNECT 상태를 감지 하지 못하고, 계속해서 getSn_SR(ch) 값이 SOCK_ESTABLISHED 남아 있습니다. 현재 이문제로 인하여 같은 포트를 재접속 불가능 하게 되었습니다. TCPIP CONNECT 중 랜 케이블 단락시 확인할 수 있는 방법이 무엇인지 알고 싶습니다. 관련 소스 첨부 합니다. 감사합니다. /** @brief loopback test using TCP(server mode) */ void loopback_tcps( u_char ch /**< channel(socket) index / ) { int len; //u_char * data_buf = (u_char) TX_BUF; // 0x1100, RX_BUF = TX_BUF+TX_RX_MAX_BUF_SIZE extern PACKET packet; extern u_char data_buf[BUFF_SIZE]; switch (getSn_SR(ch)) { case SOCK_ESTABLISHED: /* if connection is established */ if(bchannel_start[ch]==1) { Debug("%d : Connected by %s(%u)\r\n",ch,inet_ntoa(GetDestAddr(ch)),GetDestPort(ch)); bchannel_start[ch] = 2; } if ((len = getSn_RX_RSR(ch)) > 0) /* check Rx data */ { if (len > BUFF_SIZE) len = BUFF_SIZE; /* if Rx data size is lager than TX_RX_MAX_BUF_SIZE */ /* the data size to read is MAX_BUF_SIZE. */ len = recv(ch, data_buf, len); /* read the received data */ //Debug("uart_recv %d\r\n", len); //check packet len = ToPacket(data_buf, len, &packet); //Debug("ToPacket %d\r\n", len); if(len > 0) { if(packet.SPD_ID == 0xFF || packet.SPD_ID == DeviceInfo.Spd_ID) { len = process_packet(&packet); if(len > 0) { len = BUFF_SIZE; len = ToStream(&packet, data_buf, len); if(len > 0) { send(ch, data_buf, len); /* send the received data */ } } } } } break; case SOCK_CLOSE_WAIT: /* If the client request to close */ Debug("%d : CLOSE_WAIT\r\n", ch); disconnect(ch); bchannel_start[ch] = 0; break; case SOCK_CLOSED: /* if a socket is closed */ if(!bchannel_start[ch]) { Debug("%d : Loop-Back TCP Server Started.\r\n",ch); bchannel_start[ch] = 1; } if(socket(ch,Sn_MR_TCP,6001+ch,0x00) == 0) /* reinitialize the socket */ { Debug("\a%d : Fail to create socket.\r\n",ch); bchannel_start[ch] = 0; } else listen(ch); break; } }

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