1 #include <u.h>
2 #include <libc.h>
3 #include <bio.h>
4 #include <ndb.h>
5 #include <ip.h>
6 #include <thread.h>
7 #include "dns.h"
8 
9 Area *owned;
10 Area *delegated;
11 
12 /*
13  *  true if a name is in our area
14  */
15 Area*
16 inmyarea(char *name)
17 {
18 	int len;
19 	Area *s, *d;
20 
21 	len = strlen(name);
22 	for(s = owned; s; s = s->next){
23 		if(s->len > len)
24 			continue;
25 		if(cistrcmp(s->soarr->owner->name, name + len - s->len) == 0)
26 			if(len == s->len || name[len - s->len - 1] == '.')
27 				break;
28 	}
29 	if(s == 0)
30 		return 0;
31 
32 	for(d = delegated; d; d = d->next){
33 		if(d->len > len)
34 			continue;
35 		if(cistrcmp(d->soarr->owner->name, name + len - d->len) == 0)
36 			if(len == d->len || name[len - d->len - 1] == '.')
37 				return 0;
38 	}
39 
40 	return s;
41 }
42 
43 /*
44  *  our area is the part of the domain tree that
45  *  we serve
46  */
47 void
48 addarea(DN *dp, RR *rp, Ndbtuple *t)
49 {
50 	Area **l, *s;
51 
52 	if(t->val[0])
53 		l = &delegated;
54 	else
55 		l = &owned;
56 
57 	/*
58 	 *  The area contains a copy of the soa rr that created it.
59 	 *  The owner of the the soa rr should stick around as long
60 	 *  as the area does.
61 	 */
62 	s = emalloc(sizeof(*s));
63 	s->len = strlen(dp->name);
64 	rrcopy(rp, &s->soarr);
65 	s->soarr->owner = dp;
66 	s->soarr->db = 1;
67 	s->soarr->ttl = Hour;
68 	s->neednotify = 1;
69 	s->needrefresh = 0;
70 
71 syslog(0, logfile, "new area %s", dp->name);
72 
73 	s->next = *l;
74 	*l = s;
75 }
76 
77 void
78 freearea(Area **l)
79 {
80 	Area *s;
81 
82 	while(s = *l){
83 		*l = s->next;
84 		rrfree(s->soarr);
85 		free(s);
86 	}
87 }
88 
89 /*
90  * refresh all areas that need it
91  *  this entails running a command 'zonerefreshprogram'.  This could
92  *  copy over databases from elsewhere or just do a zone transfer.
93  */
94 void
95 refresh_areas(Area *s)
96 {
97 	Waitmsg *w;
98 	char *argv[3];
99 	
100 	argv[0] = zonerefreshprogram;
101 	argv[1] = "XXX";
102 	argv[2] = nil;
103 
104 	for(; s != nil; s = s->next){
105 		if(!s->needrefresh)
106 			continue;
107 
108 		if(zonerefreshprogram == nil){
109 			s->needrefresh = 0;
110 			continue;
111 		}
112 
113 		argv[1] = s->soarr->owner->name;
114 		w = runproc(argv[0], argv, 0);
115 		free(w);
116 	}
117 }
118