STP_PACKET.zip_STP_rstp_stp协议_交换机

/******************************************************************************* * STP_PACKET.c * * IC+ for IP1826 * * Editor: Chance 2008/04/09 *******************************************************************************/ /******************************************************************************* * Include Files *******************************************************************************/ #include "STP_PACKET.h" #include "MDC_MDIO.h" #include "switch.h" /******************************************************************************* * Global Variables *******************************************************************************/ m_PORT_STATUS pstatus[26]; m_STPTX send_data; m_SWITCH_INFO my_switch_info; u8_t bpduDA[6]={0x01,0x80,0xC2,0x00,0x00,0x00}; #ifdef DEBUGPORTINFO u16_t portinfo=0; u8_t info_flag=0; #endif extern u16_t stpPortForward[2]; extern u16_t stpPortTx[2]; //function for web while void STP_Process(void* pindata,u8_t in_portnum) { u8_t stp_result,root_flag,bpduflag,i; u8_t pktType=0; p_STPTRUC pinBPDU; m_BPDU_FLAGS inrstpflag; pinBPDU=(p_STPTRUC)pindata; pktType=Check_BPDU_Packet(pindata); if(pktType!=UnkownPacket) { //if received STP or RSTP BPUD then become not edge port if(pstatus[in_portnum].porttimer.edge_timer.active==1) { pstatus[in_portnum].porttimer.edge_timer.value=0; pstatus[in_portnum].porttimer.edge_timer.active=0; } pstatus[in_portnum].edge_flag=0; //is BPDU packet #ifdef STP_Process_debug printf("\nBPDU Packet %d",(u16_t)in_portnum); #endif if((pktType==ConfBPDUs)||(pktType==TcnBPDUs)) { #ifdef STP_Process_debug printf("\nBPDU STP_MODE (%02X)",(u16_t)in_portnum); #endif pstatus[in_portnum].STP_RSTP=STP;//chance for RSTP if(pktType==TcnBPDUs) { #ifdef STPPORTINFO printf("\nBPDU STP_MODE TOPOLOGY_CHANGE_NOTIFICATION_BPDU"); printf("\n DA: %02X %02X %02X %02X %02X %02X",(u16_t)pinBPDU->da[0],(u16_t)pinBPDU->da[1],(u16_t)pinBPDU->da[2],(u16_t)pinBPDU->da[3],(u16_t)pinBPDU->da[4],(u16_t)pinBPDU->da[5]); printf("\n SA: %02X %02X %02X %02X %02X %02X",(u16_t)pinBPDU->sa[0],(u16_t)pinBPDU->da[1],(u16_t)pinBPDU->sa[2],(u16_t)pinBPDU->sa[3],(u16_t)pinBPDU->sa[4],(u16_t)pinBPDU->sa[5]); printf("\n DLCLEN:%d",(u16_t)pinBPDU->dlc_len); printf("\n LLC DSAP:%02X",(u16_t)pinBPDU->llc.dsap); printf("\n LLC SSAP:%02X",(u16_t)pinBPDU->llc.ssap); printf("\n LLC ctrl:%02X",(u16_t)pinBPDU->llc.ctrl); printf("\n STP protocol ID:%04X",(u16_t)pinBPDU->rstp.proid); printf("\n STP version:%02X",(u16_t)pinBPDU->rstp.version); printf("\n STP type:%02X",(u16_t)pinBPDU->rstp.type); #endif if(pstatus[in_portnum].port_status!=DISABLED) { if(Designated_Port_Check(in_portnum)) { topology_change_detection(); //send tca to the port which TCN from pstatus[in_portnum].topology_change_acknowledge=1; transmit_config(in_portnum); } } } else { #ifdef STPPORTINFO printf("\nBPDU STP_MODE CONFIGURATION_BPDU"); printf("\n DA: %02X %02X %02X %02X %02X %02X",(u16_t)pinBPDU->da[0],(u16_t)pinBPDU->da[1],(u16_t)pinBPDU->da[2],(u16_t)pinBPDU->da[3],(u16_t)pinBPDU->da[4],(u16_t)pinBPDU->da[5]); printf("\n SA: %02X %02X %02X %02X %02X %02X",(u16_t)pinBPDU->sa[0],(u16_t)pinBPDU->da[1],(u16_t)pinBPDU->sa[2],(u16_t)pinBPDU->sa[3],(u16_t)pinBPDU->sa[4],(u16_t)pinBPDU->sa[5]); printf("\n DLCLEN:%d",(u16_t)pinBPDU->dlc_len); printf("\n LLC DSAP:%02X",(u16_t)pinBPDU->llc.dsap); printf("\n LLC SSAP:%02X",(u16_t)pinBPDU->llc.ssap); printf("\n LLC ctrl:%02X",(u16_t)pinBPDU->llc.ctrl); printf("\n STP protocol ID:%04X",(u16_t)pinBPDU->rstp.proid); printf("\n STP version:%02X",(u16_t)pinBPDU->rstp.version); printf("\n STP type:%02X",(u16_t)pinBPDU->rstp.type); printf("\n STP flags:%02X",(u16_t)pinBPDU->rstp.flags); printf("\n STP ridp:%04X",(u16_t)pinBPDU->rstp.rootid.priority); WatchDogTimerReset(); printf("\n Root ID:%02X %02X %02X %02X %02X %02X",(u16_t)pinBPDU->rstp.rootid.macid[0],(u16_t)pinBPDU->rstp.rootid.macid[1],(u16_t)pinBPDU->rstp.rootid.macid[2],(u16_t)pinBPDU->rstp.rootid.macid[3],(u16_t)pinBPDU->rstp.rootid.macid[4],(u16_t)pinBPDU->rstp.rootid.macid[5]); printf("\n STP rpc:%08lX",pinBPDU->rstp.rpc); printf("\n STP bidp:%04X",(u16_t)pinBPDU->rstp.switchid.priority); printf("\n Brigde ID:%02X %02X %02X %02X %02X %02X",(u16_t)pinBPDU->rstp.switchid.macid[0],(u16_t)pinBPDU->rstp.switchid.macid[1],(u16_t)pinBPDU->rstp.switchid.macid[2],(u16_t)pinBPDU->rstp.switchid.macid[3],(u16_t)pinBPDU->rstp.switchid.macid[4],(u16_t)pinBPDU->rstp.switchid.macid[5]); printf("\n STP pidp:%02X",(u16_t)pinBPDU->rstp.port_id.priority); printf("\n STP pid:%02X",(u16_t)pinBPDU->rstp.port_id.portid); printf("\n STP msgage:%04X",(u16_t)pinBPDU->rstp.msgage); printf("\n STP maxage:%04X",(u16_t)pinBPDU->rstp.maxage); printf("\n STP hellotime:%04X",(u16_t)pinBPDU->rstp.hellotime); printf("\n STP f_time:%04X",(u16_t)pinBPDU->rstp.f_time); printf("\n indata port number=%d",(u16_t)in_portnum); #endif root_flag=root_bridge(); if(pstatus[in_portnum].port_status!=DISABLED) { //WatchDogTimerReset(); stp_result=BPDU_COMPARE_SWITCH(pindata,in_portnum); if((stp_result==SMALL)||(stp_result==EQUAL)) { //updata bpdu information to port information update_bpdu_to_port(pindata,in_portnum); if(stp_result==SMALL) { root_select();//select root and root port designated_port_selection();//select designated port //set port state set_port_state(); } //************************20080428**************************** if(root_flag&&(!root_bridge()))//i am root before, I'm not root now. { if(my_switch_info.STP_RSTP==STP)//20080604 chance { my_switch_info.hello_timer.active=0;//chance 20080529 } //tcn if(pstatus[my_switch_info.root_port].STP_RSTP==STP)//chance 20080604 { if(my_switch_info.topology_change_detected) { //stop topology change timer pstatus[in_portnum].porttimer.topology_timer.active=0; pstatus[in_portnum].porttimer.topology_timer.value=0; transmit_tcn();//STP TCN //start tcn timer my_switch_info.tcn_timer.active=1;//STP TCN my_switch_info.tcn_timer.value=0; } } } if(in_portnum==my_switch_info.root_port)//bpdu from root port { //record root timer information my_switch_info.stp_time.MAXAGE_Time=pinBPDU->rstp.maxage; my_switch_info.stp_time.HELLO_TIME=pinBPDU->rstp.hellotime; my_switch_info.stp_time.FW_TIME=pinBPDU->rstp.f_time; bpduflag=pinBPDU->rstp.flags; if((bpduflag&0x01)==TOPOLOGY_CHANGE_FLAGS) { my_switch_info.topology_change_port=in_portnum; for(i=0;i<26;i++) { if((pstatus[i].port_status!=DISABLED)&& (pstatus[i].port_status!=BLOCK)&& (i!=in_portnum) ) { pstatus[i].topology_change=1; } } //clear mac address table Reset_LUT(); } //find the Designated port and generate the new BPDU to send