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Linux Ðźż¯ dzÎö

  LinuxÐźÅÓжàÖÖ˵·¨¡£Ò»¸ö½ø³Ì´´½¨Ò»¸öÐźÅÓÃÓÚ·¢Ë͸øÁíÍâÒ»¸ö½ø³Ì½Ð×ö·¢ËÍÒ»¸öÐźţ¬Äں˴´½¨Ò»¸öÐźŽÐ×öÉú³ÉÒ»¸öÐźţ¬½ø³Ì×Ô¼ºÏò×Ô¼º·¢ËÍÐźŽÐ×ö»½ÆðÒ»¸öÐźš£²»¹ýÎÒ¿´Ò²Ã»±ØÒªÕâôѧ¾¿Æø¡£
  Ðźż¯--signel set,Æäʵ¾ÍÊǽ«¶à¸öÐźŷÅÔÚ¼¯ºÏÖнøÐм¯ÖеĴ¦Àí¡£POSIX.1¶¨ÒåÁËsigset_tÒÔ°üº­Ò»¸öÐźż¯£¬²¢ÇÒ¶¨ÒåÁËÎå¸ö´¦ÀíÐźŵĺ¯Êý£º
  int sigemptyset(sigset_t *set);
  int sigfillset(sigset_t *set);
  int sigaddset(sigset_t *set,int signo);
  int sigdelset(sigset_t *set,int signo)
  int sigismember(const sigset_t *set,int signo);
  »¹ÓÐÒ»¸öÖØÒªµÄº¯Êý£ºint sigprocmask(int how,const sigset_t *restrict set,sigset_t *restrict oset);
  µ¥´¿½²ÕâЩº¯ÊýºÜÄѽ²Ã÷°×£¬ÏÂÃæ½áºÏ³ÌÐòÀ´½²£¬³ÌÐòÀ´×ÔUNIX»·¾³¸ß¼¶±à³Ì£º
  
   static void sig_quit(int);   //ÐźŴ¦Àíº¯Êý
   int main( )
  {
     sigset_t newmask,oldmask,pendmask;
     if(signal(SIGQUIT,sig_quit)==SIG_ERR)
            err_sys("can not catch SIGQUIT");
     -----------------------------------------------------------------------------------------------------------
     sigemptyset(&newmask);    //Çå¿ÕÐźÅÑÚÂ뼯newmask,²»×èÈûÈκÎÐźÅ
     sigaddset(&newmask,SIGQUIT);  //½«SIGQUITÐźŷÅÈëÐźż¯newmaskÖÐÈ¥
    
     if(sigprocmask(SIG_BLOCK,&newmask,&oldmask)<0) //½«oldmask ºÍnewmaskºÏ²¢
             err_sys("SIG_BLOCK error");  //µ±Ç°ÐÅºÅÆÁ±Î×Ö·ÅÔÚnewmaskÀÒÔǰµÄ·ÅÔÚoldmaskÀï
    
     sleep(5);
     if(sigpending(&pendmask)<0)   //±£´æËùÓб»×èÈûµÄÐźţ¬±¾Àý¼´±£´æSIGQUITµ½pendmaskÖÐÈ¥
            


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ʵսLinux Bluetooth±à³Ì£¨ËÄ£© L2CAP²ã±à³Ì

£¨L2CAPЭÒé¼ò½é£¬L2CAPÔÚBlueZÖеÄʵÏÖÒÔ¼°L2CAP±à³Ì½Ó¿Ú£©
Ò»£ºL2CAPЭÒé¼ò½é£º
Logical Link Control and Adaptation Protocol(L2CAP)
Âß¼­Á¬½Ó¿ØÖƺÍÊÊÅäЭÒé (L2CAP) ΪÉϲãЭÒéÌá¹©ÃæÏòÁ¬½ÓºÍÎÞÁ¬½ÓµÄÊý¾Ý·þÎñ£¬²¢Ìṩ¶àЭÒ鹦ÄܺͷָîÖØ×é²Ù×÷¡£L2CAP ³äÐíÉϲãЭÒéºÍÓ¦ÓÃÈí¼þ´«ÊäºÍ½ÓÊÕ×î´ó³¤¶ÈΪ 64K µÄ L2CAP Ê ......

LinuxÂãÉ豸×ܽá

Ô­Ìû¼ûhttp://www.inthirties.com/thread-685-1-1.html 
1¡¢Ê²Ã´ÂãÉ豸£¿×Ö·ûÉ豸£¿¿éÉ豸£¿ 
ÂãÉ豸£ºÒ²½ÐÂã·ÖÇø£¨Ô­Ê¼·ÖÇø£©£¬ÊÇÒ»ÖÖûÓо­¹ý¸ñʽ»¯£¬²»±»Unix/Linuxͨ¹ýÎļþϵͳÀ´¶ÁÈ¡µÄÌØÊâ×Ö·ûÉ豸¡£ÂãÉ豸¿ÉÒÔ°ó¶¨Ò»¸ö·ÖÇø£¬Ò²¿ÉÒÔ°ó¶¨Ò»¸ö´ÅÅÌ¡£ 
×Ö·ûÉ豸£º¶Ô×Ö·ûÉ豸µÄ¶Áд²»ÐèҪͨ¹ýOSµÄbuffer ......

linux Ë«Íø¿¨·þÎñÆ÷NAT·þÎñ

debian lenny , my favorite
a. vim  /etc/sysctl.conf:
    modify net.ipv4.ip_forward = 1
b. flush route table:
    iptables -F
    iptables -P INPUT ACCEPT
    iptables -P FORWARD ACCEPT
c. open NAT services:
 &nb ......
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