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tc: fix ipv6 filter selector attribute for some prefix lengths

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Wrong TCA_U32_SEL attribute packing if prefixLen AND 0x1f equals 0x1f.
These are  /31, /63, /95 and /127 prefix lengths.

Example:
ip6 dst face:b00f::/31
filter parent b: protocol ipv6 pref 2307 u32
filter parent b: protocol ipv6 pref 2307 u32 fh 800: ht divisor 1
filter parent b: protocol ipv6 pref 2307 u32 fh 800::800 order 2048
key ht 800 bkt 0
  match faceb00f/ffffffff at 24

v2: previous patch was made with a wrong repo

Signed-off-by: Yulia Kartseva <hex@fb.com>
This commit is contained in:
Yulia Kartseva 2017-09-30 20:18:40 -07:00 committed by Stephen Hemminger
parent e4139268ba
commit 73451259da
1 changed files with 1 additions and 2 deletions
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3
tc/f_u32.c
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@ -385,8 +385,7 @@ static int parse_ip6_addr(int *argc_p, char ***argv_p,
plen = addr.bitlen;
for (i = 0; i < plen; i += 32) {
/* if (((i + 31) & ~0x1F) <= plen) { */
if (i + 31 <= plen) {
if (i + 31 < plen) {
res = pack_key(sel, addr.data[i / 32],
0xFFFFFFFF, off + 4 * (i / 32), offmask);
if (res < 0)