int
d_a_p(dns_pkt_a * dpa, char *buf, int limitlen)
{
int offset, rdlen;
uint16_t u;
int i;
if ((rdlen = nametolbl(dpa->name, buf)) == -1)
return -1;
offset = rdlen;
if (offset + 10 > limitlen)
err_intret(ERR_DNSPLB);
buf += offset;
u = htons(dpa->type);
memcpy(buf, &u, 2);
buf += 2;
offset += 2;
u = htons(dpa->cl);
memcpy(buf, &u, 2);
buf += 2;
offset += 2;
i = htonl(dpa->ttl);
memcpy(buf, &i, 4);
buf += 4;
offset += 4;
if (dpa->type == T_A) {
if (offset + dpa->rdlength > limitlen)
err_intret(ERR_DNSPLB);
memcpy(buf + 2, dpa->rdata, dpa->rdlength);
offset += dpa->rdlength;
} else if (dpa->type == T_MX) {
memcpy(buf + 2, dpa->rdata, 2);
if ((rdlen = nametolbl(dpa->rdata + 2, buf + 4)) == -1) {
error(err_str);
err_ret(ERR_DNSMDA, -1);
}
offset += rdlen + 2;
if (offset > limitlen)
err_ret(ERR_DNSPLB, -1);
dpa->rdlength = rdlen + 2;
} else {
if ((rdlen = nametolbl(dpa->rdata, buf + 2)) == -1) {
error(err_str);
err_ret(ERR_DNSMDA, -1);
}
offset += rdlen;
if (offset > limitlen)
err_ret(ERR_DNSPLB, -1);
dpa->rdlength = rdlen;
}
u = htons(dpa->rdlength);
memcpy(buf, &u, 2);
offset += 2;
return offset;
}
/*
* Translate a struct dns_pkt_qst in the dns-buffer buf.
* Returns:
* -1 On error
* Bytes writed otherwise.
*/
int d_qst_p(dns_pkt_qst *dpq,char *buf, int limitlen)
{
int offset;
uint16_t u;
if((offset=nametolbl(dpq->qname,buf))==-1) {
error(err_str);
err_ret(ERR_DNSMDA,-1);
}
if (offset+4>limitlen)
err_ret(ERR_DNSPLB,-1);
buf+=offset;
u=htons(dpq->qtype);
memcpy(buf,&u,2);
buf+=2;offset+=2;
u=htons(dpq->qclass);
memcpy(buf,&u,2);
buf+=2;offset+=2;
return offset;
}
