From: James Coglan <james@neighbourhood.ie>
Date: Mon, 10 Jun 2024 13:16:50 +0000 (+0100)
Subject: resolved: tests for dns_packet_append_answer(); single A record
X-Git-Tag: v257-rc1~844^2~10
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=1516ebfc023e7fc6506350a421b84d1859e31a3d;p=thirdparty%2Fsystemd.git

resolved: tests for dns_packet_append_answer(); single A record
---

diff --git a/src/resolve/test-dns-packet-append.c b/src/resolve/test-dns-packet-append.c
index 651be640cc6..a9f2520dc00 100644
--- a/src/resolve/test-dns-packet-append.c
+++ b/src/resolve/test-dns-packet-append.c
@@ -491,4 +491,50 @@ TEST(packet_truncate_opt) {
         ASSERT_EQ(memcmp(DNS_PACKET_DATA(packet), data, sizeof(data)), 0);
 }
 
+/* ================================================================
+ * dns_packet_append_answer()
+ * ================================================================ */
+
+TEST(packet_append_answer_single_a) {
+        _cleanup_(dns_packet_unrefp) DnsPacket *packet = NULL;
+        _cleanup_(dns_answer_unrefp) DnsAnswer *answer = NULL;
+        DnsResourceRecord *rr = NULL;
+
+        answer = dns_answer_new(1);
+        ASSERT_NOT_NULL(answer);
+
+        rr = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_A, "example.com");
+        ASSERT_NOT_NULL(rr);
+        rr->ttl = 3601;
+        rr->a.in_addr.s_addr = htobe32(0xc0a8017f);
+        dns_answer_add(answer, rr, 1, 0, NULL);
+        dns_resource_record_unref(rr);
+
+        ASSERT_OK(dns_packet_new(&packet, DNS_PROTOCOL_DNS, 0, DNS_PACKET_SIZE_MAX));
+        ASSERT_NOT_NULL(packet);
+
+        DNS_PACKET_ID(packet) = htobe16(42);
+        DNS_PACKET_HEADER(packet)->flags = htobe16(DNS_PACKET_MAKE_FLAGS(1, 0, 1, 0, 1, 1, 0, 0, DNS_RCODE_SUCCESS));
+        DNS_PACKET_HEADER(packet)->ancount = htobe16(dns_answer_size(answer));
+
+        ASSERT_OK(dns_packet_append_answer(packet, answer, NULL));
+
+        const uint8_t data[] = {
+                        0x00, 0x2a,     BIT_QR | BIT_AA | BIT_RD, BIT_RA | DNS_RCODE_SUCCESS,
+                        0x00, 0x00,     0x00, 0x01,     0x00, 0x00,     0x00, 0x00,
+
+        /* name */      0x07, 'e', 'x', 'a', 'm', 'p', 'l', 'e',
+                        0x03, 'c', 'o', 'm',
+                        0x00,
+        /* A */         0x00, 0x01,
+        /* IN */        0x00, 0x01,
+        /* ttl */       0x00, 0x00, 0x0e, 0x11,
+        /* rdata */     0x00, 0x04,
+        /* ip */        0xc0, 0xa8, 0x01, 0x7f
+        };
+
+        ASSERT_EQ(packet->size, sizeof(data));
+        ASSERT_EQ(memcmp(DNS_PACKET_DATA(packet), data, sizeof(data)), 0);
+}
+
 DEFINE_TEST_MAIN(LOG_DEBUG)