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resolved: tests for dns_packet_patch_max_udp_size()

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This commit is contained in:
James Coglan
2024-07-22 10:47:59 +01:00
parent b81b8faa43
commit d6f1f962fe
1 changed files with 54 additions and 0 deletions
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src/resolve/test-dns-packet-append.c
+54
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@@ -492,6 +492,60 @@ TEST(packet_truncate_opt) {
ASSERT_EQ(memcmp(DNS_PACKET_DATA(packet), data, sizeof(data)), 0);
}
/* ================================================================
* dns_packet_patch_max_udp_size()
* ================================================================ */
TEST(packet_patch_max_udp_size) {
_cleanup_(dns_packet_unrefp) DnsPacket *packet = NULL;
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(0, 0, 0, 0, 1, 0, 0, 0, DNS_RCODE_SUCCESS));
ASSERT_OK(dns_packet_append_opt(packet, 512, false, false, NULL, 0, NULL));
ASSERT_TRUE(dns_packet_patch_max_udp_size(packet, 4097));
const uint8_t data[] = {
0x00, 0x2a, BIT_RD, DNS_RCODE_SUCCESS,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
/* root */ 0x00,
/* OPT */ 0x00, 0x29,
/* udp max */ 0x10, 0x01,
/* rcode */ 0x00,
/* version */ 0x00,
/* flags */ 0x00, 0x00,
/* rdata */ 0x00, 0x00
};
ASSERT_EQ(packet->size, sizeof(data));
ASSERT_EQ(memcmp(DNS_PACKET_DATA(packet), data, sizeof(data)), 0);
}
TEST(packet_patch_max_udp_size_no_opt) {
_cleanup_(dns_packet_unrefp) DnsPacket *packet = NULL;
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(0, 0, 0, 0, 1, 0, 0, 0, DNS_RCODE_SUCCESS));
ASSERT_FALSE(dns_packet_patch_max_udp_size(packet, 4097));
const uint8_t data[] = {
0x00, 0x2a, BIT_RD, DNS_RCODE_SUCCESS,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
ASSERT_EQ(packet->size, sizeof(data));
ASSERT_EQ(memcmp(DNS_PACKET_DATA(packet), data, sizeof(data)), 0);
}
/* ================================================================
* dns_packet_append_answer()
* ================================================================ */