Add s6dns_hosts reading functions

Signed-off-by: Laurent Bercot <ska@appnovation.com>

1 files changed, 40 insertions, 0 deletions

diff --git a/src/libs6dns/s6dns_hosts_aaaaa_string.c b/src/libs6dns/s6dns_hosts_aaaaa_string.c
new file mode 100644
index 0000000..f4b00f0
--- /dev/null
+++ b/src/libs6dns/s6dns_hosts_aaaaa_string.c
@@ -0,0 +1,40 @@
+/* ISC license. */
+
+#include <errno.h>
+#include <string.h>
+
+#include <skalibs/ip46.h>
+#include <skalibs/stralloc.h>
+#include <skalibs/genalloc.h>
+
+#include <s6-dns/hosts.h>
+
+extern int s6dns_hosts_aaaaa_string_r (cdb const *c, char const *name, genalloc *ga, int isunq)
+{
+  stralloc sa = STRALLOC_ZERO ;
+  int gawn = !genalloc_s(ip46full, ga) ;
+  size_t gabase = genalloc_len(ip46full, ga) ;
+  int r = s6dns_hosts_a_string_r(c, name, &sa, isunq) ;
+  if (r <= 0) return r ;
+  if (!genalloc_readyplus(ip46full, ga, r)) return -1 ;
+  for (size_t i = 0 ; i < r ; i++)
+    ip46full_from_ip4(genalloc_s(ip46full, ga) + i, sa.s + (i << 2)) ;
+  genalloc_setlen(ip46full, ga, gabase + r) ;
+  sa.len = 0 ;
+  r = s6dns_hosts_aaaa_string_r(c, name, &sa, isunq) ;
+  if (r == -1) goto err ;
+  if (r)
+  {
+    if (!genalloc_readyplus(ip46full, ga, r)) goto err ;
+    for (size_t i = 0 ; i < r ; i++)
+      ip46full_from_ip6(genalloc_s(ip46full, ga) + i, sa.s + (i << 4)) ;
+    genalloc_setlen(ip46full, ga, genalloc_len(ip46full, ga) + r) ;
+  }
+  stralloc_free(&sa) ;
+  return genalloc_len(ip46full, ga) - gabase ;
+
+ err:
+  if (gawn) genalloc_free(ip46full, ga) ; else genalloc_setlen(ip46full, ga, gabase) ;
+  stralloc_free(&sa) ;
+  return -1 ;
+}