ip: fix udp/tcp checksum corner cases

When checksumming chained buffers with odd lengths: insert a
NULL byte, or the calculation fails.

Type: fix

Signed-off-by: Dave Barach <dave@barachs.net>
Signed-off-by: John Lo <loj@cisco.com>
Change-Id: I380f7c42897bdb28c8c29aa1c4cdaaa849cc9ecc

1 files changed, 276 insertions, 0 deletions

diff --git a/extras/oddbuf/setup.oddbuf b/extras/oddbuf/setup.oddbuf
new file mode 100644
index 00000000000..d59db566d11
--- /dev/null
+++ b/extras/oddbuf/setup.oddbuf
@@ -0,0 +1,276 @@
+set term pag off
+loop create
+set int state loop0 up
+oddbuf enable loop0
+
+packet-generator new {
+    name oddbuf
+    limit 1
+    size 300-300
+    interface loop0
+    node ethernet-input
+    data { IP4: 1.2.3 -> 4.5.6
+           UDP: 11.22.33.44 -> 11.22.34.44
+           UDP: 1234 -> 2345
+           incrementing 286
+    }
+}
+pcap dispatch trace on max 10000 buffer-trace pg-input 1000
+
+oddbuf configure n_to_copy 2 offset 1 first_offset 5
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 2 offset 1 first_offset 5
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 2 offset 2 first_offset 5
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 2 offset 3 first_offset 5
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 2 offset 4 first_offset 5
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 2 offset 5 first_offset 5
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 2 offset 6 first_offset 5
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 2 offset 7 first_offset 5
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 3 offset 0 first_offset 5
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 3 offset 1 first_offset 5
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 3 offset 2 first_offset 5
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 3 offset 3 first_offset 5
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 3 offset 4 first_offset 5
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 3 offset 5 first_offset 5
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 3 offset 6 first_offset 5
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 3 offset 7 first_offset 5
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 4 offset 0 first_offset 5
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 4 offset 1 first_offset 5
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 4 offset 2 first_offset 5
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 4 offset 3 first_offset 5
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 4 offset 4 first_offset 5
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 4 offset 5 first_offset 5
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 4 offset 6 first_offset 5
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 4 offset 7 first_offset 5
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 5 offset 0 first_offset 5
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 5 offset 1 first_offset 5
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 5 offset 2 first_offset 5
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 5 offset 3 first_offset 5
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 5 offset 4 first_offset 5
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 5 offset 5 first_offset 5
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 5 offset 6 first_offset 5
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 5 offset 7 first_offset 5
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 2 offset 1 first_offset 0
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 2 offset 1 first_offset 0
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 2 offset 2 first_offset 0
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 2 offset 3 first_offset 0
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 2 offset 4 first_offset 0
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 2 offset 5 first_offset 0
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 2 offset 6 first_offset 0
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 2 offset 7 first_offset 0
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 3 offset 0 first_offset 0
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 3 offset 1 first_offset 0
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 3 offset 2 first_offset 0
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 3 offset 3 first_offset 0
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 3 offset 4 first_offset 0
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 3 offset 5 first_offset 0
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 3 offset 6 first_offset 0
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 3 offset 7 first_offset 0
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 4 offset 0 first_offset 0
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 4 offset 1 first_offset 0
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 4 offset 2 first_offset 0
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 4 offset 3 first_offset 0
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 4 offset 4 first_offset 0
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 4 offset 5 first_offset 0
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 4 offset 6 first_offset 0
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 4 offset 7 first_offset 0
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 5 offset 0 first_offset 0
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 5 offset 1 first_offset 0
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 5 offset 2 first_offset 0
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 5 offset 3 first_offset 0
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 5 offset 4 first_offset 0
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 5 offset 5 first_offset 0
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 5 offset 6 first_offset 0
+pa en oddbuf
+suspend
+
+oddbuf configure n_to_copy 5 offset 7 first_offset 0
+pa en oddbuf
+suspend
+
+pcap dispatch trace off