test: dm: eth: Add csum_ipv6_magic test

Test checksum computation. csum_ipv6_magic() uses in upper layer
protocols as TCP/UDP/ICMPv6/etc to calculate payload checksum.

Series-changes: 3
- Fixed style problems

Signed-off-by: Viacheslav Mitrofanov <v.v.mitrofanov@yadro.com>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

diff --git a/test/dm/eth.c b/test/dm/eth.c
index a3d4fc061bfa85b1a9712435dfc39b6ff009d42b..5ffa0c41d77e27e78ac2451bef565c5d5c6c0831 100644 (file)
--- a/test/dm/eth.c
+++ b/test/dm/eth.c
@@ -75,6 +75,35 @@ static int dm_test_string_to_ip6(struct unit_test_state *uts)
        return 0;
 }
 DM_TEST(dm_test_string_to_ip6, 0);
+
+static int dm_test_csum_ipv6_magic(struct unit_test_state *uts)
+{
+       unsigned short csum = 0xbeef;
+       /* Predefined correct parameters */
+       unsigned short correct_csum = 0xd8ac;
+       struct in6_addr saddr = {.s6_addr32[0] = 0x000080fe,
+                                .s6_addr32[1] = 0x00000000,
+                                .s6_addr32[2] = 0xffe9f242,
+                                .s6_addr32[3] = 0xe8f66dfe};
+       struct in6_addr daddr = {.s6_addr32[0] = 0x000080fe,
+                                .s6_addr32[1] = 0x00000000,
+                                .s6_addr32[2] = 0xffd5b372,
+                                .s6_addr32[3] = 0x3ef692fe};
+       u16 len = 1460;
+       unsigned short proto = 17;
+       unsigned int head_csum = 0x91f0;
+
+       csum = csum_ipv6_magic(&saddr, &daddr, len, proto, head_csum);
+       ut_asserteq(csum, correct_csum);
+
+       /* Broke a parameter */
+       proto--;
+       csum = csum_ipv6_magic(&saddr, &daddr, len, proto, head_csum);
+       ut_assert(csum != correct_csum);
+
+       return 0;
+}
+DM_TEST(dm_test_csum_ipv6_magic, 0);
 #endif
 
 static int dm_test_eth(struct unit_test_state *uts)