#define RR_CNAME 5
#define RR_AAAA 28
+#define ABUF_SIZE 768
+
static int dns_parse_callback(void *c, int rr, const void *data, int len, const void *packet)
{
char tmp[256];
memcpy(ctx->addrs[ctx->cnt++].addr, data, 16);
break;
case RR_CNAME:
- if (__dn_expand(packet, (const unsigned char *)packet + 512,
+ if (__dn_expand(packet, (const unsigned char *)packet + ABUF_SIZE,
data, tmp, sizeof tmp) > 0 && is_valid_hostname(tmp))
strcpy(ctx->canon, tmp);
break;
static int name_from_dns(struct address buf[static MAXADDRS], char canon[static 256], const char *name, int family, const struct resolvconf *conf)
{
- unsigned char qbuf[2][280], abuf[2][512];
+ unsigned char qbuf[2][280], abuf[2][ABUF_SIZE];
const unsigned char *qp[2] = { qbuf[0], qbuf[1] };
unsigned char *ap[2] = { abuf[0], abuf[1] };
int qlens[2], alens[2];
if ((abuf[i][3] & 15) != 0) return EAI_FAIL;
}
- for (i=0; i<nq; i++)
+ for (i=nq-1; i>=0; i--)
__dns_parse(abuf[i], alens[i], dns_parse_callback, &ctx);
if (ctx.cnt) return ctx.cnt;