mystar.c

802.1x的客户端实现,相比较2.56版本

            }
            break;
        case 0x03:         //认证成功
            if(m_state!=2) continue;
            m_state=3;
            fputs("@@ Password valid, authentication SUCCESS!!! :)\n",stdout);

            if (m_echoInterval<=0) goto done; //user has echo disabled

            //uTemp.ulValue = *(((u_long *)(pkt_data+0x9d)));
            offset=ntohs( *((u_int16_t*)(pkt_data+0x10)) );
            uTemp.ulValue = *((u_int32_t *)(pkt_data+(0x11+offset)-0x08));
            m_key.btValue[0] = Alog(uTemp.btValue[3]);
            m_key.btValue[1] = Alog(uTemp.btValue[2]);
            m_key.btValue[2] = Alog(uTemp.btValue[1]);
            m_key.btValue[3] = Alog(uTemp.btValue[0]);

            //unblock SIGINT, so we can exit with Ctrl+C
            (void)sigemptyset(&sigset_zero);
            (void)sigaddset(&sigset_zero,SIGINT);
            (void)sigprocmask(SIG_UNBLOCK,&sigset_zero,NULL);
            // continue echoing
            fputs("Keeping sending echo... \n",stdout);
            /*                 while(SendEchoPacket(l,pkt_data)==0) sleep(m_echoInterval);*/
            /* v v v v v v v v v v v v v v v v v v v v v v v v v v v v v v v v v v v v v v      */
            if (m_intelligentReconnect == 1)
            {
                ConnectionMonitor_init(m_intelligentHost, m_DbgInfoLevel);
                DbgInfo(20,"Start Connection Monitor!");
                SetInterval(6);
                StartConnectionMonitor();
            }
            while(SendEchoPacket(l,pkt_data)==0)
            {
                MySleep(m_echoInterval);
                if (m_intelligentReconnect == 1)
                {
                    if (IsStillConnected() == 0)
                    {
                        StopConnectionMonitor();
                        //SendEndCertPacket(l);
                        goto beginAuthentication;
                    }// if IsStillConnected()
                } // if m_intelligentReconnect
            }
            /*  ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^  By 夕霞孤雁 05.10.20   */
            goto err2; //this should never happen.

            break;
        case 0x04:        //认证失败(用户名或密码错误/不在上网时段内/重复上网等)
            if((m_state==0)||(m_state==3)) continue;
            m_state=0;
            msgLen=ntohs( *((u_int16_t*)(pkt_data+0x10)) )-10;
            if (msgLen>0)
            {
                if(msgLen>=(sizeof(msgBuf)-1)) msgLen=sizeof(msgBuf)-1;
                memset(msgBuf,'\0',sizeof(msgBuf));
                memcpy(msgBuf, pkt_data+0x1c, msgLen);
                pmsgBuf=msgBuf;
                //remove the leanding "\r\n" which seems alway to exist!
                if((msgLen>2)&&(msgBuf[0]==0xd)&&(msgBuf[1]==0xa)) pmsgBuf+=2;
            }
        else { pmsgBuf=""; } //这个估计是服务器告知静默或确认断网的包

            fprintf(stdout,"@@ Authenticaton failed!!! :(%s\n",pmsgBuf);
            (void)SendEndCertPacket(l);

            goto beginAuthentication;

            break; //should never come here

        }// end switch
    }// end while

done:
    pcap_close(p); libnet_destroy(l);
    return 0;

err2:
    pcap_close(p);
err1:
    libnet_destroy(l);
    return 1;
}


static void checkAndSetConfig(void)
{
    FILE  *fp;
    char   buf[4096];
    char  *p;
    int   i,len;
    static char name[32];
    static char password[32];
    static char nic[32];
    static char fakeAddress[32];
    int  intelligentReconnect=-1;
    /* ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ */
    static char intelligentHost[255];
    static unsigned int DbgInfoLevel = 0;
    /* +++++++++++++++++++++++++++++++++++++++++++++++++ By 夕霞孤雁 05.10.20   */
    int  echoInterval=-1;
    int  authenticationMode=-1;

    //the check and anylysis against mystar.conf  *don't*  work perfectly.
    //this may be improved in the later version.
    if( (fp=fopen("mystar.conf","r"))==NULL ) err_quit("cannot open file mystar.conf ! check it.\n");
    while(fgets(buf,sizeof(buf),fp)!=NULL)
    {
        if( (buf[0]=='#') || (buf[0]=='\n') ) continue;
        len=strlen(buf); if(buf[len-1]=='\n') buf[len-1]='\0';
        if( ( (p=strchr(buf,'=')) == NULL) || (p==buf) )  continue;
        //the code above doesn't detect ALL the errors!! it should be improved in future.

        *p++='\0';
        for(i=0; i<strlen(buf); i++) buf[i]=tolower(buf[i]);

        if(strcmp(buf,"name")==0)
        {  strncpy(name,p,sizeof(name)-1); name[sizeof(name)-1]=0;  m_name=name; }
        else if(strcmp(buf,"password")==0)
        {
            strncpy(password,p,sizeof(password)-1); password[sizeof(password)-1]=0;
            m_password=password;
        }
        else if(strcmp(buf,"authenticationmode")==0)
        { authenticationMode=atoi(p);    m_authenticationMode=authenticationMode; }
        else if(strcmp(buf,"nic")==0)
        {
            for(i=0; i<strlen(p); i++) p[i]=tolower(p[i]);
            strncpy(nic,p,sizeof(nic)-1); nic[sizeof(nic)-1]=0; m_nic=nic;
        }
        else if(strcmp(buf,"echointerval")==0)
        { echoInterval=atoi(p);   m_echoInterval=echoInterval;  }
        else if(strcmp(buf,"intelligentreconnect")==0)
        { intelligentReconnect=atoi(p);  m_intelligentReconnect=intelligentReconnect; }
        /* +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ */
        else if(strcmp(buf,"intelligenthost")==0)
        {
            strncpy(intelligentHost,p,sizeof(intelligentHost)-1); intelligentHost[sizeof(intelligentHost)-1]=0;
            m_intelligentHost=intelligentHost;
        }
        else if(strcmp(buf,"dbginfolevel") == 0)
        {
            DbgInfoLevel=atoi(p);
            m_DbgInfoLevel = DbgInfoLevel;
        }
        /* +++++++++++++++++++++++++++++++++++++++++++++++++++ By 夕霞孤雁 05.10.20  */
        else if(strcmp(buf,"fakeaddress")==0)
        {
            strncpy(fakeAddress,p,sizeof(fakeAddress)-1);
            fakeAddress[sizeof(fakeAddress)-1]=0;
            if( inet_pton(AF_INET,fakeAddress,m_ip)<=0 )
                err_msg("invalid fakeAddress found in mystar.conf, ignored...\n");
            else m_fakeAddress=fakeAddress;
        }
        else continue;
    }
    if(ferror(fp)) err_quit("cannot read mystar.conf ! check it.\n");
    fclose(fp);

    if((m_name==NULL)||(m_name[0]==0)) err_quit("invalid name found in mystar.conf!\n");
    if((m_password==NULL)||(m_password[0]==0)) err_quit("invalid password found in mystar.conf!\n");
    if((m_authenticationMode<0)||(m_authenticationMode>1))
        err_quit("invalid authenticationMode found in mystar.conf!\n");
    if( (m_nic==NULL) || (strcmp(m_nic,"")==0) ||  (strcmp(m_nic,"any")==0) )
        err_quit("invalid nic found in mystar.conf!\n");
    if((m_echoInterval<0)||(m_echoInterval>100))
        err_quit("invalid echo interval found in mystar.conf!\n" );
    if((m_intelligentReconnect<0)||(m_intelligentReconnect>1))
        err_quit("invalid intelligentReconnect found in mystar.conf!\n");

    /* Used by Test Arguments
    printf("m_name=%s\n",m_name);
    printf("m_password=%s\n",m_password);
    printf("m_nic=%s\n",m_nic);
    printf("m_authenticationMode=%d\n",m_authenticationMode);
    printf("m_echoInterval=%d\n",m_echoInterval);
    printf("m_intelligentReconnect=%d\n",m_intelligentReconnect);//NOT supported now!!
    printf("m_fakeAddress=%s\n",m_fakeAddress); 
    */

    //Just set them to zero since they don't seem to be important.
    //These will be initlized by libnet's function
    memset(m_netgate,0,sizeof(m_netgate));  memset(m_dns1,0,sizeof(m_dns1));
}

static void sig_intr(int signo)
{
    libnet_t *l=NULL;
    char      l_errbuf[LIBNET_ERRBUF_SIZE];

    if(m_state==3)
    {
        if((l=libnet_init(LIBNET_LINK, m_nic,l_errbuf))==NULL) _exit(0);
        (void)SendEndCertPacket(l);
        libnet_destroy(l);
    }
    _exit(0); //Different with exit() function
}