Add Packet/IPv4/TCP/UDP helpers API

src/packet/test/gtest_udp_helpers.cpp

@@ -0,0 +1,30 @@
+#include <gtest/gtest.h>
+
+#include "udp_helpers.h"
+
+/*
+ * User Datagram Protocol, Src Port: 4001, Dst Port: 8000
+ *     Source Port: 4001
+ *     Destination Port: 8000
+ *     Length: 155
+ *     Checksum: 0x1e1e [correct]
+ *         [Calculated Checksum: 0x1e1e]
+ *     [Checksum Status: Good]
+ */
+
+unsigned char data[] = {0x0f, 0xa1, 0x1f, 0x40, 0x00, 0x9b, 0x1e, 0x1e};
+
+TEST(UDP_HELPERS, GET)
+{
+    const struct udphdr *hdr = (struct udphdr *)data;
+    EXPECT_TRUE(udp_hdr_get_sport(hdr) == 4001);
+    EXPECT_TRUE(udp_hdr_get_dport(hdr) == 8000);
+    EXPECT_TRUE(udp_hdr_get_len(hdr) == 155);
+    EXPECT_TRUE(udp_hdr_get_checksum(hdr) == 0x1e1e);
+}
+
+int main(int argc, char **argv)
+{
+    ::testing::InitGoogleTest(&argc, argv);
+    return RUN_ALL_TESTS();
+}