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7.1 ipt_targetºÍipt_entry_target½á¹¹ ip_tables.h
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struct ipt_target
{
struct list_head list;
const char name[IPT_FUNCTION_MAXNAMELEN];
/* ÔÚʹÓñ¾MatchµÄ¹æÔò×¢Èë±íÖÐ֮ǰµ÷Ó㬽øÐÐÓÐЧÐÔ¼ì²é£¬Èç¹û·µ»Ø0£¬¹æÔò¾Í²»»á¼ÓÈëiptablesÖÐ */
int (*checkentry)(const char *tablename,
const struct ipt_entry *e,
void *targinfo,
unsigned int targinfosize,
unsigned int hook_mask);
/* ÔÚ°üº¬±¾TargetµÄ¹æÔò´Ó±íÖÐɾ³ýʱµ÷Óã¬ÓëcheckentryÅäºÏ¿ÉÓÃÓÚ¶¯Ì¬ÄÚ´æ·ÖÅäºÍÊÍ·Å */
void (*destroy)(void *targinfo, unsigned int targinfosize);
/* targetµÄÄ£¿éº¯Êý£¬Èç¹ûÐèÒª¼ÌÐø´¦ÀíÔò·µ»ØIPT_CONTINUE£¨-1£©£¬·ñÔò·µ»ØNF_ACCEPT¡¢NF_DROPµÈÖµ£¬ËüµÄµ÷ÓÃÕ߸ù¾ÝËüµÄ·µ»ØÖµÀ´ÅжÏÈçºÎ´¦ÀíËü´¦Àí¹ýµÄ±¨ÎÄ*/
unsigned int (*target)(struct sk_buff **pskb,
const struct net_device *in,
const struct net_device *out,
unsigned int hooknum,
&n
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