linuxÄÚºËnetfilterµÄʵÏÖÒÔ¼°ipset
netfilterµÄʵÏÖ»úÖÆ»ùÓÚËĸö²ã´ÎµÄÆ¥Å䣬Êý¾Ý°üÔÚÿ¸ö²ã´Î¶¼Òª¾¹ýÒ»¸ö¹ýÂËÁ´±í£¬µÚÒ»¸ö²ã´Î¾ÍÊÇhook£¬ÖÚËùÖÜÖªlinuxÄÚºËÖÐÒ»¹²ÓµÓÐ5¸öhooks£¬µ±È»ÄãÒ²¿ÉÒÔ×Ô¼ºÐÞ¸ÄÄÚºËÔÚÈκεط½Ìí¼Óhook£»µÚ¶þ¸ö²ã´Î¾ÍÊÇÿ¸öhookÏÂÃæµÄtables£¬Ã¿Ò»¸öhook¶¼¹ý¹ÒÔØÁã¸ö»òÕßÈô¸É¸ötables£¬Êý¾Ý°üÒªÒ»¸öÒ»¸ö¾¹ýÕâЩtables£»µÚÈý¸ö²ã´Î¾ÍÊÇrule£¬Ã¿¸ötableÏÂÃæÓµÓÐÁã¸ö»òÕßÈô¸É¸örule£¬Êý¾Ý°üÒªÒÀ´Î¾¹ýÕâЩrules£¬Ö»ÒªÓÐÒ»¸örule¶ÔÊý¾Ý°ü½øÐÐÁ˲þö£¬ÄÇô½«²»ÔÙ¾¹ý¸ÃhookµÄ¸ÃtableµÄ¶ÔÓ¦ruleµÄºóÃærules£»µÚËĸö²ã´ÎÊÇmatchs£¬ºÍrulesµÄ±éÀúÕýºÃÏà·´£¬Êý¾Ý°üÖ»ÓÐÔÚ¶ÔÓ¦ruleÏÂÃæµÄËùÓеÄmatchs¶¼Æ¥Åäºó²ÅËãÆ¥Åä¡£
ÔÚÄÚºËÖУ¬netfilterÊÇÓÉÏÂÃæ4¸öºËÐĽṹÌåÖ§³ÅÆðÀ´µÄ£º
struct xt_table_info
{
unsigned int size;
unsigned int number;
unsigned int initial_entries;
unsigned int hook_entry[NF_IP_NUMHOOKS];
unsigned int underflow[NF_IP_NUMHOOKS];
char *entries[NR_CPUS];
};
entries[cpu]Ö¸ÏòÁËÒ»¸öipt_entryÊý×飬¸ÃÊý×éµÄÄÚ´æ×éÖ¯ÐÎʽÊÇÆ½Ì¹µÄ£¬Í¨¹ýipt_entryµÄnext_offset×ֶνøÐбéÀú£º
struct ipt_entry
{
struct ipt_ip ip;
unsigned int nfcache;
u_int16_t target_offset;
u_int16_t next_offset;
unsigned int comefrom;
struct xt_counters counters;
unsigned char elems[0];
};
elemsÖ¸ÏòÁËÒ»¿éƽ̹ÄÚ´æÄ£Ê½µÄ£¬°üº¬ÁËÈô¸É¸ömatchsºÍÒ»¸ötarget£¬targetͨ¹ýtarget_offsetÀ´¶¨Î»£¬¸÷¸ömatchsÕýÈçÉÏÃæËù˵£¬Í¨¹ýnext_offsetÀ´½øÐбéÀúµÄ£º
struct xt_entry_match
{
union {
struct {
u_int16_t match_size;
char name[XT_FUNCTION_MAXNAMELEN-1];
u_int8_t revision;
} user;
struct {
&nbs
Ïà¹ØÎĵµ£º
´´½¨×ÀÃæÍ¼±ê
Ŀǰ½«ÍøÂçÓ¦ÓÃÀ©Õ¹µ½×ÀÃæÊÇÒ»¸öÇ÷ÊÆ£¬´æÔÚןܶà½â¾ö·½°¸£¬±¾ÎÄÒÔ Mozilla Prism ΪÀý£¬ÀàËÆµÄ·½·¨Í¬ÑùÊÊÓÃÓÚ Google Chrome ¡£
1. µ½ Mozilla Prism µÄÍøÕ¾ÉÏÏÂÔØ Prism£¬µã»÷ Download Now Ö®ºó»áÌáʾÓÐÁ½ÖÖ£¬Ò»ÖÖÊÇÒÔ Mozilla Firefox À©Õ¹µÄ·½Ê½£¬ÊʺÏÒѾ°²×°ÓÐ Firefox µÄÅóÓÑ£»Ò»Ö ......
Ê×ÏÈ£¬Ó¦ÓóÌÐòÊÇÎÞ·¨Ö±½Ó·ÃÎÊÄ£¿éÖеĺ¯ÊýµÄ£¨¼´Ê¹ÊÇÄã×Ô±à×Ô¹ÒµÄÄ£¿é££Êµ¼ÊÉÏËüÒ²ÊÇÄÚºËÄ£¿é£©£¬Óû§¿Õ¼äÓëÄں˿ռäÖ®¼äÖ»ÓÐͨ¹ýÒ»Ð©ÌØ¶¨µÄϵͳº¯ÊýÀ´½øÐÐͨѶ£¨Èçʲôuser_to_kernel£©£¬¶ø¾ø¶Ô²»¿ÉÄÜͨ¹ý“Ö±½Óµ÷ÓÃÄ£¿éÀïµÄº¯Êý”ÕâÖÖÐÎʽÀ´Í¨Ñ¶¡£
ÄÇô£¬Ëù±àдµÄÄ£¿éÀïµÄº¯ÊýÔõô²ÅÄܱ»Ö´ÐУ¿ÓÉ˵÷Óã¿Æä ......
ZZ ×Ôhttp://dev.firnow.com/course/6_system/linux/Linuxjs/200896/139627.html
.tar
¡¡¡¡½â°ü£º tar xvf FileName.tar
¡¡¡¡´ò°ü£ºtar cvf FileName.tar DirName
¡¡
¡¡£¨×¢£ºtarÊÇ´ò°ü£¬²»ÊÇѹËõ£¡£©
¡¡¡¡---------------------------------------------
......
linuxËÑË÷·¾¶: Èç¹ûÓõÄshellÊÇbash,Ôò»·¾³±äÁ¿¼ÓÔØ
1./etc/profile
2.Óû§homeĿ¼ÏÂÃæµÄ.bash_profile
3.Óû§homeĿ¼ÏÂÃæµÄ.bash_login
gcc -I<includeĿ¼>
POSIXϵͳҲ¿ÉÒÔ½¨Á¢»·¾³±äÁ¿
......
linuxÄÚºËʵÏÖÁËcrypto½Ó¿Ú£¬ÓÃÓÚÀàËÆIPSecÖ®ÀàÒªÔÚÄÚºËÖÐʵÏÖµÄÓë²Ù×÷ϵͳ°ó¶¨µÄ°²È«»úÖÆ£¬Èç¹û²»ÊÇÓÃÓÚÕâÑùµÄ»úÖÆ£¬²»ÒªÊ¹ÓÃÄÚºËÖеÄcrypto½Ó¿Ú£¬×ܵÄÀ´Ëµ£¬linuxµÄcryptoÖÐ×îÖØÒªµÄ½á¹¹ÌåÓÐÁ½¸ö£ºcrypto_tfmºÍcrypto_alg
struct crypto_tfm {
u32 crt_flags;
union {
& ......