wide-dhcp

最近察看wide-dhcp相关的代码时候有一个结构体：struct dhcp6_list，定义一直没找到

搜索后发现是用宏定义实现的：

#define TAILQ_HEAD(name, type)                      \
struct name {                               \
struct type *tqh_first; /* first element */         \
struct type **tqh_last; /* addr of last next element */     \
}

#define TAILQ_ENTRY(type)                       \
struct {                                \
struct type *tqe_next;  /* next element */          \
struct type **tqe_prev; /* address of previous next element */  \
}

TAILQ_HEAD(dhcp6_list, dhcp6_listval);
struct dhcp6_listval {
TAILQ_ENTRY(dhcp6_listval) link;
dhcp6_listval_type_t type;
union {
int uv_num;
u_int16_t uv_num16;
struct in6_addr uv_addr6;
struct dhcp6_prefix uv_prefix6;
struct dhcp6_statefuladdr uv_statefuladdr6;
struct dhcp6_ia uv_ia;
struct dhcp6_vbuf uv_vbuf;
struct dhcp6_vendor_opt vendor_opt;
} uv;
struct dhcp6_list sublist;
};