408 lines
9.8 KiB
C
408 lines
9.8 KiB
C
//////////////////////////////////////////////////
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//Title : pub_inet.c
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//Auhtor : Liu Wei
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//Desc : public inet function implementation
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//Created : 2007-06-22
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//Revision :
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//
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//Revision :
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//
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//////////////////////////////////////////////////
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#include "./include/pub_inet.h"
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/*@ignore@*/
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///////////////////////////////////////////////////////////////////////////
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// Inet If Address infomation interface
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///////////////////////////////////////////////////////////////////////////
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extern int GetNetIfInfo ( IfAddr * pIfAddr )
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{
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int fd;
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struct ifreq buf[MAXINTERFACES];
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struct arpreq arp;
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struct ifconf ifc;
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pIfAddr->uIfNum = 0;
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if ( ( fd = socket ( AF_INET, SOCK_DGRAM, 0 ) ) >= 0 )
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{
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ifc.ifc_len = sizeof buf;
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ifc.ifc_buf = ( caddr_t ) buf;
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if ( !ioctl ( fd, SIOCGIFCONF, ( char * ) &ifc ) )
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{
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int i;
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pIfAddr->uIfNum = ifc.ifc_len / sizeof ( struct ifreq );
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pIfAddr->uIfNum = pIfAddr->uIfNum % MAXINTERFACES;
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for ( i = 0; i < pIfAddr->uIfNum; i++ )
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{
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ioctl ( fd, SIOCGIFFLAGS, ( char * ) &buf[i] );
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pIfAddr->tIfEntity[i].uIfState = buf[i].ifr_flags & IFF_UP;
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if ( !( ioctl ( fd, SIOCGIFADDR, ( char * ) &buf[i] ) ) )
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{
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pIfAddr->tIfEntity[i].dIfIP = ( ( struct sockaddr_in * )
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( &buf[i].ifr_addr ) )->
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sin_addr.s_addr;
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}
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}
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}
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}
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close ( fd );
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return pIfAddr->uIfNum;
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}
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static u32 wxc2_bind_ip=0xFFFFFFFF, wxc2_shm_shift;
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void ReadMCMSParam()
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{
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char cnf_file[]="./conf/mcms_conf.txt";
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char info_str[256], *buf_ptr;;
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FILE *fp=NULL;
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fp = fopen(cnf_file,"r");
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wxc2_bind_ip = 0;
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wxc2_shm_shift = 0;
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if(fp == NULL)
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return;
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while (!feof(fp))
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{
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info_str[0] = '\n';
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fgets(info_str,250,fp);
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if (info_str[0] == '#' || info_str[0] == '\n')
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continue;
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buf_ptr = info_str;
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if(!strncasecmp(info_str,"bind ip=",8))
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{
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wxc2_bind_ip = inet_addr(&info_str[8]);
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continue;
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}
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if(!strncasecmp(info_str,"shm key shift=",14))
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{
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wxc2_shm_shift = atoi(&info_str[14]);
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continue;
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}
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}
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fclose(fp);
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}
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u32 GetLocalIP( )
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{
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struct hostent *host;
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struct in_addr *hostip_addr;
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char name[100];
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if(wxc2_bind_ip == 0xFFFFFFFF)
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ReadMCMSParam();
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if(wxc2_bind_ip == 0)
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{
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gethostname ( name, 24 );
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host = gethostbyname ( name );
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hostip_addr = ( struct in_addr * ) ( *host->h_addr_list );
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return hostip_addr->s_addr;
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}
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return wxc2_bind_ip;
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}
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u32 GetLocalIP1( )
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{
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if(wxc2_bind_ip == 0xFFFFFFFF)
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ReadMCMSParam();
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if(wxc2_bind_ip == 0)
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{
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return INADDR_ANY;
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}
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return wxc2_bind_ip;
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}
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u32 wxc2_get_shm_offset()
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{
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if(wxc2_bind_ip == 0xFFFFFFFF)
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ReadMCMSParam();
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return wxc2_shm_shift;
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}
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///////////////////////////////////////////////////////////////////////////
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// Inet If Address infomation interface
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///////////////////////////////////////////////////////////////////////////
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//У<><D0A3><EFBFBD><EFBFBD><EFBFBD>㷨
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static u16 IcmpCheckSum ( u16 * addr, int len )
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{
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int nleft = len;
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int sum = 0;
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u16 *w = addr;
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u16 answer = 0;
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//<2F><>ICMP<4D><50>ͷ<EFBFBD><CDB7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>2<EFBFBD>ֽ<EFBFBD>Ϊ<EFBFBD><CEAA>λ<EFBFBD>ۼ<EFBFBD><DBBC><EFBFBD><EFBFBD><EFBFBD>
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while ( nleft > 1 )
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{
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sum += *w++;
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nleft -= 2;
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}
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//<2F><>ICMP<4D><50>ͷΪ<CDB7><CEAA><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֽڣ<D6BD><DAA3><EFBFBD>ʣ<EFBFBD><CAA3><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD>ֽڡ<D6BD>
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//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD>ֽ<EFBFBD><D6BD><EFBFBD>Ϊһ<CEAA><D2BB>2<EFBFBD>ֽ<EFBFBD><D6BD><EFBFBD><EFBFBD>ݵĸ<DDB5><C4B8>ֽڣ<D6BD><DAA3><EFBFBD><EFBFBD><EFBFBD>2<EFBFBD>ֽ<EFBFBD><D6BD><EFBFBD><EFBFBD>ݵĵ<DDB5><C4B5>ֽ<EFBFBD>Ϊ0<CEAA><30><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ۼ<EFBFBD>
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if ( nleft == 1 )
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{
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*( unsigned char * ) ( &answer ) = *( unsigned char * ) w;
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sum += answer;
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}
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sum = ( sum >> 16 ) + ( sum & 0xffff );
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sum += ( sum >> 16 );
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answer = ~sum;
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return answer;
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}
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//<2F><><EFBFBD><EFBFBD>ICMP<4D><50>ͷ
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static int IcmpPacking ( IcmpSrv * pIS )
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{
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int i, packsize;
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struct icmp *icmp;
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struct timeval *tval;
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icmp = ( struct icmp * ) pIS->aSendBuff;
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icmp->icmp_type = ICMP_ECHO;
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icmp->icmp_code = 0;
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icmp->icmp_cksum = 0;
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icmp->icmp_seq = pIS->nPackNumSend;
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icmp->icmp_id = pIS->tPid;
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packsize = 8 + pIS->uDataLen;
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//<2F><>¼<EFBFBD><C2BC><EFBFBD><EFBFBD>ʱ<EFBFBD><CAB1>
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tval = ( struct timeval * ) icmp->icmp_data;
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gettimeofday ( tval, NULL );
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icmp->icmp_cksum = IcmpCheckSum ( ( u16 * ) icmp, packsize );
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return packsize;
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}
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//<2F><>ȥICMP<4D><50>ͷ
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static int IcmpUnPack ( u8 * buf, int len, IcmpSrv * pIS )
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{
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int i, nIpHdrLen;
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struct ip *pIP;
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struct icmp *icmp;
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struct timeval *tvSend;
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struct timeval tvRecv;
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double rtt;
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gettimeofday ( &tvRecv, NULL );
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pIP = ( struct ip * ) buf;
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//<2F><>ip<69><70>ͷ<EFBFBD><CDB7><EFBFBD><EFBFBD>,<2C><>ip<69><70>ͷ<EFBFBD>ij<EFBFBD><C4B3>ȱ<EFBFBD>־<EFBFBD><D6BE>4
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nIpHdrLen = pIP->ip_hl << 2;
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//Խ<><D4BD>ip<69><70>ͷ,ָ<><D6B8>ICMP<4D><50>ͷ
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icmp = ( struct icmp * ) ( buf + nIpHdrLen );
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//ICMP<4D><50>ͷ<EFBFBD><CDB7>ICMP<4D><50><EFBFBD>ݱ<EFBFBD><DDB1><EFBFBD><EFBFBD>ܳ<EFBFBD><DCB3><EFBFBD>
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len -= nIpHdrLen;
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if ( len < 8 )
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//С<><D0A1>ICMP<4D><50>ͷ<EFBFBD><CDB7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><F2B2BBBA><EFBFBD>
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{
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printf ( "ICMP packets's length is less than 8 " );
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return 0;
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}
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//ȷ<><C8B7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>յ<EFBFBD><D5B5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĵ<EFBFBD>ICMP<4D>Ļ<EFBFBD>Ӧ
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if ( ( icmp->icmp_type == ICMP_ECHOREPLY )
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&& ( icmp->icmp_id == pIS->tPid ) )
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{
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tvSend = ( struct timeval * ) icmp->icmp_data;
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rtt = ( tvRecv.tv_sec * 1000 + tvRecv.tv_usec / 1000 ) -
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( tvSend->tv_sec * 1000 + tvSend->tv_usec / 1000 );
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printf ( "%d byte from %s: icmp_seq=%u ttl=%d rtt=%.3f ms \n", len,
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inet_ntoa ( pIS->tFromAddr.sin_addr ), icmp->icmp_seq,
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pIP->ip_ttl, rtt );
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return 1;
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}
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return 0;
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}
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static void IcmpStatis ( IcmpSrv * pIS )
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{
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int nSend, nRecv;
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nSend = pIS->nPackNumSend;
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nRecv = pIS->nPackNumRecv;
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printf ( " --------------------PING statistics------------------- \n" );
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printf ( "%d packets transmitted, %d received , %%%d lost \n\n", nSend,
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nRecv, ( nSend - nRecv ) / nSend * 100 );
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close ( pIS->wSockfd );
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pIS->uSrvState = 0;
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}
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//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ICMP<4D><50><EFBFBD><EFBFBD>
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static int IcmpSend ( IcmpSrv * pIS )
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{
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int nSize;
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if ( pIS->nPackNumSend < MAX_NO_PACKETS )
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{
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pIS->nPackNumSend++;
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nSize = IcmpPacking ( pIS );
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//<2F><><EFBFBD><EFBFBD>ICMP<4D><50>ͷ
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if ( sendto ( pIS->wSockfd, pIS->aSendBuff, nSize, 0,
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( struct sockaddr * ) &pIS->tToAddr,
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sizeof ( pIS->tToAddr ) ) < 0 )
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{
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perror ( "sendto error" );
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return 0;
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}
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printf ( "[IcmpSend] : Send icmp Pack %d \n", pIS->nPackNumSend );
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return 1;
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}
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return 0;
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}
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//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ICMP<4D><50><EFBFBD><EFBFBD>
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static void IcmpRecv ( IcmpSrv * pIS )
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{
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int n, fromlen;
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extern int errno;
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fromlen = sizeof ( pIS->tFromAddr );
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while ( pIS->nPackNumRecv < pIS->nPackNumSend )
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{
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if ( ( n =
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recvfrom ( pIS->wSockfd, pIS->aRecvBuff,
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sizeof ( pIS->aRecvBuff ), 0,
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( struct sockaddr * ) &pIS->tFromAddr,
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&fromlen ) ) < 0 )
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{
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if ( errno == EINTR )
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continue;
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perror ( "recvfrom error" );
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continue;
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}
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if ( IcmpUnPack ( pIS->aRecvBuff, n, pIS ) == -1 )
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continue;
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pIS->nPackNumRecv++;
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}
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}
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extern int PingInit ( IcmpSrv * pIS, int nDataLen )
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{
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memset ( pIS, 0, sizeof ( IcmpSrv ) );
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pIS->uSrvState = 0;
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pIS->uDataLen = 56;
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if ( ( pIS->pProtoent = getprotobyname ( "icmp" ) ) == NULL )
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{
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perror ( "getprotobyname" );
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exit ( 1 );
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}
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// <20><><EFBFBD><EFBFBD>rootȨ<74><C8A8>,<2C><><EFBFBD>õ<EFBFBD>ǰ<EFBFBD>û<EFBFBD>Ȩ<EFBFBD><C8A8>
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setuid ( getuid ( ) );
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//<2F><>ȡmain<69>Ľ<EFBFBD><C4BD><EFBFBD>id,<2C><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ICMP<4D>ı<EFBFBD>־<EFBFBD><D6BE>
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pIS->tPid = getpid ( );
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}
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extern int PingStart ( IcmpSrv * pIS, char *sIP, PingCallBack fCallBack )
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{
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int nSize;
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struct hostent *pHost;
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//struct in_addr *pInAddr;
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u32 nInetAddr;
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if ( pIS->uSrvState )
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{
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return 0;
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}
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pIS->fCallBack = fCallBack;
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//<2F><><EFBFBD><EFBFBD>ʹ<EFBFBD><CAB9>ICMP<4D><50>ԭʼ<D4AD><EFBFBD><D7BD><EFBFBD>,<2C><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><D7BD><EFBFBD>ֻ<EFBFBD><D6BB>root<6F><74><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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if ( ( pIS->wSockfd =
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socket ( AF_INET, SOCK_RAW, pIS->pProtoent->p_proto ) ) < 0 )
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{
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perror ( "socket error" );
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exit ( 1 );
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}
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//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><D7BD>ֽ<EFBFBD><D6BD>ջ<EFBFBD><D5BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>50K<30><4B><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҪΪ<D2AA>˼<EFBFBD>С<EFBFBD><D0A1><EFBFBD>ջ<EFBFBD><D5BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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//<2F>Ŀ<EFBFBD><C4BF><EFBFBD><EFBFBD><EFBFBD>, <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ping<6E><67><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><D3A6>
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setsockopt ( pIS->wSockfd, SOL_SOCKET, SO_RCVBUF, &nSize,
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sizeof ( nSize ) );
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bzero ( &pIS->tToAddr, sizeof ( pIS->tToAddr ) );
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pIS->tToAddr.sin_family = AF_INET;
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//<2F>ж<EFBFBD><D0B6><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ip<69><70>ַ
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nInetAddr = inet_addr ( sIP );
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if ( nInetAddr == INADDR_NONE )
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{
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if ( ( pHost = gethostbyname ( sIP ) ) == NULL ) //<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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{
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perror ( "gethostbyname error" );
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exit ( 1 );
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}
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memcpy ( ( char * ) &pIS->tToAddr.sin_addr, pHost->h_addr,
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pHost->h_length );
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}
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else //<2F><>ip<69><70>ַ
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{
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pIS->tToAddr.sin_addr.s_addr = nInetAddr;
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//memcpy( (char *)&pIS->tToAddr,(char *)&nInetAddr,host->h_length);
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}
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printf ( "PING %s(%s): %d bytes data in ICMP packets. \n", sIP,
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inet_ntoa ( pIS->tToAddr.sin_addr ), pIS->uDataLen );
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pIS->uSrvState = 1;
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pIS->uIcmpState = 1;
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}
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extern int PingTimer ( IcmpSrv * pIS )
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{
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if ( pIS->uSrvState )
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{
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IcmpRecv ( pIS );
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switch ( pIS->uIcmpState )
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{
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case 1:
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case 2:
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case 3:
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IcmpSend ( pIS );
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pIS->uIcmpState++;
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break;
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default:
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if ( pIS->nPackNumRecv >= 3 )
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{
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IcmpStatis ( pIS );
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pIS->fCallBack ( 1 );
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}
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if ( pIS->uIcmpState++ > 200 )
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{
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IcmpStatis ( pIS );
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pIS->fCallBack ( 0 );
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}
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break;
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}
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}
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}
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/*@end@*/
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