From b8d0f83e6cea9640a7ee4402c163ad812237355d Mon Sep 17 00:00:00 2001
From: Laurent Bercot <ska-skaware@skarnet.org>
Date: Sun, 10 Dec 2023 11:48:01 +0000
Subject:  Initial commit

Signed-off-by: Laurent Bercot <ska@appnovation.com>
---
 src/server/shibari_packet_add_rr.c | 46 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 src/server/shibari_packet_add_rr.c

(limited to 'src/server/shibari_packet_add_rr.c')

diff --git a/src/server/shibari_packet_add_rr.c b/src/server/shibari_packet_add_rr.c
new file mode 100644
index 0000000..b92e8dd
--- /dev/null
+++ b/src/server/shibari_packet_add_rr.c
@@ -0,0 +1,46 @@
+/* ISC license. */
+
+#include <stdint.h>
+#include <string.h>
+
+#include <skalibs/uint16.h>
+#include <skalibs/uint32.h>
+
+#include <shibari/constants.h>
+#include <shibari/packet.h>
+
+int shibari_packet_add_rr (shibari_packet *p, shibari_tdb_entry const *entry, int prefixlen, uint16_t offset, unsigned int section)
+{
+  uint16_t *count[4] = { &p->hdr.counts.qd, &p->hdr.counts.an, &p->hdr.counts.ns, &p->hdr.counts.nr } ;
+  uint16_t rrlen = 10 + entry->data.len + (entry->flags & 1 ? 2 : 0) + (prefixlen >= 0 ? prefixlen + 2 : entry->key.len) ;
+  if (p->max - p->pos < rrlen) return 0 ;
+  if (entry->flags & 1)
+  {
+    p->buf[p->pos++] = 1 ;
+    p->buf[p->pos++] = '*' ;
+  }
+  if (prefixlen >= 0)
+  {
+    memcpy(p->buf + p->pos, entry->key.s, prefixlen) ;
+    p->pos += prefixlen ;
+    uint16_pack_big(p->buf + p->pos, 49164 + offset) ;
+    p->pos += 2 ;
+  }
+  else
+  {
+    memcpy(p->buf + p->pos, entry->key.s, entry->key.len) ;
+    p->pos += entry->key.len ;
+  }
+  uint16_pack_big(p->buf + p->pos, entry->type) ;
+  p->pos += 2 ;
+  uint16_pack_big(p->buf + p->pos, SHIBARI_C_IN) ;
+  p->pos += 2 ;
+  uint32_pack_big(p->buf + p->pos, entry->ttl) ;
+  p->pos += 4 ;
+  uint16_pack_big(p->buf + p->pos, entry->data.len) ;
+  p->pos += 2 ;
+  memcpy(p->buf + p->pos, entry->data.s, entry->data.len) ;
+  p->pos += entry->data.len ;
+  (*count[section-1])++ ;
+  return 1 ;
+}
-- 
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