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31 * @(#)radix.h 8.2 (Berkeley) 10/31/94
39 #include <sys/cdefs.h>
43 * Radix search tree node layout.
47 struct radix_mask *rn_mklist; /* list of masks contained in subtree */
48 struct radix_node *rn_p; /* parent */
49 short rn_b; /* bit offset; -1-index(netmask) */
50 char rn_bmask; /* node: mask for bit test*/
51 u_char rn_flags; /* enumerated next */
52 #define RNF_NORMAL 1 /* leaf contains normal route */
53 #define RNF_ROOT 2 /* leaf is root leaf for tree */
54 #define RNF_ACTIVE 4 /* This node is alive (for rtfree) */
56 struct { /* leaf only data: */
57 caddr_t rn_Key; /* object of search */
58 caddr_t rn_Mask; /* netmask, if present */
59 struct radix_node *rn_Dupedkey;
61 struct { /* node only data: */
62 int rn_Off; /* where to start compare */
63 struct radix_node *rn_L;/* progeny */
64 struct radix_node *rn_R;/* progeny */
69 struct radix_node *rn_twin;
70 struct radix_node *rn_ybro;
74 #define rn_dupedkey rn_u.rn_leaf.rn_Dupedkey
75 #define rn_key rn_u.rn_leaf.rn_Key
76 #define rn_mask rn_u.rn_leaf.rn_Mask
77 #define rn_off rn_u.rn_node.rn_Off
78 #define rn_l rn_u.rn_node.rn_L
79 #define rn_r rn_u.rn_node.rn_R
82 * Annotations to tree concerning potential routes applying to subtrees.
86 short rm_b; /* bit offset; -1-index(netmask) */
87 char rm_unused; /* cf. rn_bmask */
88 u_char rm_flags; /* cf. rn_flags */
89 struct radix_mask *rm_mklist; /* more masks to try */
91 caddr_t rmu_mask; /* the mask */
92 struct radix_node *rmu_leaf; /* for normal routes */
94 int rm_refs; /* # of references to this struct */
97 #define rm_mask rm_rmu.rmu_mask
98 #define rm_leaf rm_rmu.rmu_leaf /* extra field would make 32 bytes */
101 if (rn_mkfreelist) {\
103 rn_mkfreelist = (m)->rm_mklist; \
105 m = (struct radix_mask *)rtmalloc(sizeof(*(m)), "MKGet"); }\
107 #define MKFree(m) { (m)->rm_mklist = rn_mkfreelist; rn_mkfreelist = (m);}
109 struct radix_node_head {
110 struct radix_node *rnh_treetop;
111 int rnh_addrsize; /* permit, but not require fixed keys */
112 int rnh_pktsize; /* permit, but not require fixed keys */
113 struct radix_node *(*rnh_addaddr) /* add based on sockaddr */
114 (void *v, void *mask,
115 struct radix_node_head *head, struct radix_node nodes[]);
116 struct radix_node *(*rnh_addpkt) /* add based on packet hdr */
117 (void *v, void *mask,
118 struct radix_node_head *head, struct radix_node nodes[]);
119 struct radix_node *(*rnh_deladdr) /* remove based on sockaddr */
120 (void *v, void *mask, struct radix_node_head *head);
121 struct radix_node *(*rnh_delpkt) /* remove based on packet hdr */
122 (void *v, void *mask, struct radix_node_head *head);
123 struct radix_node *(*rnh_matchaddr) /* locate based on sockaddr */
124 (void *v, struct radix_node_head *head);
125 struct radix_node *(*rnh_lookup) /* locate based on sockaddr */
126 (void *v, void *mask, struct radix_node_head *head);
127 struct radix_node *(*rnh_matchpkt) /* locate based on packet hdr */
128 (void *v, struct radix_node_head *head);
129 int (*rnh_walktree) /* traverse tree */
130 (struct radix_node_head *head,
131 int (*f)(struct radix_node *, struct walkarg *),
133 struct radix_node rnh_nodes[3]; /* empty tree for common case */
137 #define Bcopy(a, b, n) memmove(((void *)(b)), ((void *)(a)), (size_t)(n))
138 #define Bzero(p, n) memset((void *)(p), 0, (size_t)(n));
139 #define Free(p) free((void *)p);
142 int rn_inithead(struct radix_node_head **head, int off);
143 int rn_walktree(struct radix_node_head *,
144 int (*)(struct radix_node *, struct walkarg *),
147 #endif /* __RADIX_H_ */