int
dns_addanswer(struct dnspkt *pkt, const char *data, int len, int link)
{
struct rr *rrp;
const char *ptr;
char *buf;
ptr = (char*)data2txt((unsigned char*)data, &len);
buf = malloc(len);
memcpy(buf, ptr, len);
rrp = _new_listitem(&pkt->answer);
rrp->data = buf;
rrp->len = len;
rrp->link = link;
return _get_listlen(pkt->query) - 1;
}
Segment*
dupseg(Segment **seg, int segno, int share)
{
int i, size;
Pte *pte;
Segment *n, *s;
SET(n);
s = seg[segno];
qlock(&s->lk);
if(waserror()){
qunlock(&s->lk);
nexterror();
}
switch(s->type&SG_TYPE) {
case SG_TEXT: /* New segment shares pte set */
case SG_SHARED:
case SG_PHYSICAL:
goto sameseg;
case SG_STACK:
n = newseg(s->type, s->base, s->size);
break;
case SG_BSS: /* Just copy on write */
if(share)
goto sameseg;
n = newseg(s->type, s->base, s->size);
break;
case SG_DATA: /* Copy on write plus demand load info */
if(segno == TSEG){
n = data2txt(s);
poperror();
qunlock(&s->lk);
return n;
}
if(share)
goto sameseg;
n = newseg(s->type, s->base, s->size);
incref(s->image);
n->image = s->image;
n->fstart = s->fstart;
n->flen = s->flen;
break;
}
size = s->mapsize;
for(i = 0; i < size; i++)
if(pte = s->map[i])
n->map[i] = ptecpy(pte);
n->flushme = s->flushme;
if(s->ref > 1)
procflushseg(s);
poperror();
qunlock(&s->lk);
return n;
sameseg:
incref(s);
poperror();
qunlock(&s->lk);
return s;
}
