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- #include <u.h>
- #include <libc.h>
- #include <bio.h>
- #include <ndb.h>
- #include <ip.h>
- #include "dns.h"
- Area *owned;
- Area *delegated;
- /*
- * true if a name is in our area
- */
- Area*
- inmyarea(char *name)
- {
- int len;
- Area *s, *d;
- len = strlen(name);
- for(s = owned; s; s = s->next){
- if(s->len > len)
- continue;
- if(cistrcmp(s->soarr->owner->name, name + len - s->len) == 0)
- if(len == s->len || name[len - s->len - 1] == '.')
- break;
- }
- if(s == 0)
- return 0;
- for(d = delegated; d; d = d->next){
- if(d->len > len)
- continue;
- if(cistrcmp(d->soarr->owner->name, name + len - d->len) == 0)
- if(len == d->len || name[len - d->len - 1] == '.')
- return 0;
- }
- return s;
- }
- /*
- * our area is the part of the domain tree that
- * we serve
- */
- void
- addarea(DN *dp, RR *rp, Ndbtuple *t)
- {
- Area **l, *s;
- if(t->val[0])
- l = &delegated;
- else
- l = &owned;
- /*
- * The area contains a copy of the soa rr that created it.
- * The owner of the the soa rr should stick around as long
- * as the area does.
- */
- s = emalloc(sizeof(*s));
- s->len = strlen(dp->name);
- rrcopy(rp, &s->soarr);
- s->soarr->owner = dp;
- s->soarr->db = 1;
- s->soarr->ttl = Hour;
- s->neednotify = 1;
- s->needrefresh = 0;
- syslog(0, logfile, "new area %s", dp->name);
- s->next = *l;
- *l = s;
- }
- void
- freearea(Area **l)
- {
- Area *s;
- while(s = *l){
- *l = s->next;
- rrfree(s->soarr);
- free(s);
- }
- }
- /*
- * refresh all areas that need it
- * this entails running a command 'zonerefreshprogram'. This could
- * copy over databases from elsewhere or just do a zone transfer.
- */
- void
- refresh_areas(Area *s)
- {
- int pid;
- Waitmsg *w;
- for(; s != nil; s = s->next){
- if(!s->needrefresh)
- continue;
- if(zonerefreshprogram == nil){
- s->needrefresh = 0;
- continue;
- }
- switch(pid = fork()){
- case -1:
- break;
- case 0:
- execl(zonerefreshprogram, "zonerefresh", s->soarr->owner->name, nil);
- exits(0);
- break;
- default:
- for(;;){
- w = wait();
- if(w == nil)
- break;
- if(w->pid == pid){
- if(w->msg == nil || *w->msg == 0)
- s->needrefresh = 0;
- free(w);
- break;
- }
- free(w);
- }
- }
- }
- }
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