ip.lst

mc51单片机对rtl8019编程,实现ethernet的收发控制.

C51 COMPILER V6.23a  IP                                                                    05/11/2004 18:03:26 PAGE 1   


C51 COMPILER V6.23a, COMPILATION OF MODULE IP
OBJECT MODULE PLACED IN ip.OBJ
COMPILER INVOKED BY: d:\Keil\C51\BIN\C51.EXE ip.c LARGE ROM(COMPACT) BROWSE DEBUG OBJECTEXTEND

stmt level    source

   1          
   2          #include "ethernet.h"
   3          #include "arp.h"
   4          #include "ip.h"
   5          #include "icmp.h"
   6          #include "udp.h"
   7          extern  Net_inf_struc   net_inf;
   8          void ip_config(Uint8 *pip_local, Uint8 *pip_remote,Uint8 *pip_gateway,Uint8 *pip_mask)
   9          {
  10   1              if(pip_local==NULL)
  11   1                      memset(net_inf.ip_local,0,INADDR_LEN);
  12   1              else
  13   1                      memcpy(net_inf.ip_local,pip_local,INADDR_LEN);
  14   1              if(pip_remote==NULL)
  15   1                      memset(net_inf.ip_remote,0,INADDR_LEN);
  16   1              else
  17   1                      memcpy(net_inf.ip_remote,pip_remote,INADDR_LEN);
  18   1              if(pip_gateway==NULL)
  19   1                      memset(net_inf.ip_gateway,0,INADDR_LEN);
  20   1              else
  21   1                      memcpy(net_inf.ip_gateway,pip_gateway,INADDR_LEN);
  22   1              if(pip_mask==NULL)
  23   1                      memset(net_inf.ip_mask,0,INADDR_LEN);
  24   1              else
  25   1                      memcpy(net_inf.ip_mask,pip_mask,INADDR_LEN);
  26   1      
  27   1      }
  28          Uint16 cpu_checksum( Uint16* pBuffer, Uint16 aLength) 
  29          {
  30   1              Uint32 checksum=0;
  31   1              Uint16 i;
  32   1              for(i=0;i<aLength;i++)
  33   1                checksum+=(Uint32)(*pBuffer++);
  34   1              checksum=(checksum>>16)+(checksum&0xffff);
  35   1              checksum=(checksum>>16)+(checksum&0xffff);      
  36   1              return (Uint16)(~checksum); 
  37   1      }
  38          
  39          
  40          //-----------------------------------------------------------------
  41          Bool ip_send(Uint8 *pBuffer)
  42          {
  43   1              Ether_header_struc* ethHdr;
  44   1              Ip_struc* ipPkt;
  45   1              Uint8 *pmac;
  46   1              ethHdr = ( Ether_header_struc*)pBuffer;
  47   1              ipPkt = ( Ip_struc*) (pBuffer + sizeof(Ether_header_struc));
  48   1              ipPkt->ip_sum =0;
  49   1              ipPkt->ip_sum = cpu_checksum(( Uint16 *) ipPkt, 10);
  50   1                      
  51   1              pmac= get_macaddr(ipPkt->ip_dst);
  52   1              if(pmac==NULL){
  53   2                      //can't find
  54   2                      arp_send(ARPOP_REQUEST, 0, ipPkt->ip_dst);
  55   2                      memset(ethHdr->ether_dhost, 0xff, ETHER_ADDR_LEN);
C51 COMPILER V6.23a  IP                                                                    05/11/2004 18:03:26 PAGE 2   

  56   2              }
  57   1              else{
  58   2                      memcpy(ethHdr->ether_dhost,pmac, ETHER_ADDR_LEN); 
  59   2              }
  60   1              // MAC
  61   1              ethHdr->ether_type = ETHERTYPE_IP;
  62   1              memcpy(ethHdr->ether_shost,net_inf.mac,ETHER_ADDR_LEN);                 
  63   1              return ethernet_send(pBuffer, ipPkt->ip_len + sizeof(Ether_header_struc));
  64   1      }
  65          
  66          //-----------------------------------------------------------------
  67          // IP packet receive & action
  68          Bool ip_receive(Uint8* pBuffer)
  69          {
  70   1              Ip_struc* ipPkt;
  71   1              Uint8 i;
  72   1              ipPkt = ( Ip_struc*) (pBuffer + sizeof( Ether_header_struc));
  73   1              if(ipPkt->ip_hl_v != IPVERSION_HEADERLEN)
  74   1                      return FALSE;
  75   1              i = memcmp(net_inf.ip_local,ipPkt->ip_dst, INADDR_LEN);
  76   1              if(i){//not for this ip, check boardcast addr
  77   2                      for(i=0;i<INADDR_LEN;i++){
  78   3                              if(ipPkt->ip_dst[i] !=  net_inf.ip_local[i]){
  79   4                                      if(ipPkt->ip_dst[i] != 0xff)
  80   4                                              return FALSE;                                   
  81   4                              }
  82   3                      }       
  83   2              }
  84   1              if (cpu_checksum(( Uint16 *) ipPkt, 10) == 0){
  85   2                      switch(ipPkt->ip_p){
  86   3                              case IPPROTO_ICMP:{
  87   4                                      icmp_receive(pBuffer);
  88   4                                      break;
  89   4                              }
  90   3                              case IPPROTO_UDP:{
  91   4                                      udp_process((Uint8*)ipPkt + sizeof(Ip_struc));
  92   4                                      break;
  93   4                              }
  94   3                              case IPPROTO_TCP:{
  95   4                              //      tcp_receive(ipPkt->ip_len - sizeof(Ip_struc));
  96   4                                      break;
  97   4                              }
  98   3                              default:
  99   3                                      return FALSE;
 100   3                      }
 101   2              }               
 102   1              return TRUE;
 103   1      }
 104          


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =   1047    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----      41
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


C51 COMPILATION COMPLETE.  0 WARNING(S),  0 ERROR(S)