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