diff options
| author |   Daniel Borkmann <dborkman@redhat.com> | 2013-09-04 00:19:39 +0200 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2013-09-04 14:53:20 -0400 |
| commit | e3f5b17047dec4acd8957dad053e70d87f18d97e (patch) | |
| tree | d7386719180cff0e7ab8c98cc530c5ac7ec7c62a /include/net/mld.h | |
| parent | net: ipv6: mld: clean up MLD_V1_SEEN macro (diff) | |
| download | linux-dev-e3f5b17047dec4acd8957dad053e70d87f18d97e.tar.xz linux-dev-e3f5b17047dec4acd8957dad053e70d87f18d97e.zip | |
net: ipv6: mld: get rid of MLDV2_MRC and simplify calculation
Get rid of MLDV2_MRC and use our new macros for mantisse and
exponent to calculate Maximum Response Delay out of the Maximum
Response Code.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Cc: Hannes Frederic Sowa <hannes@stressinduktion.org>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/mld.h')
| -rw-r--r-- | include/net/mld.h | 28 |
1 files changed, 19 insertions, 9 deletions
diff --git a/include/net/mld.h b/include/net/mld.h index 2b5421f6a7c2..faa1d161bf24 100644 --- a/include/net/mld.h +++ b/include/net/mld.h @@ -63,15 +63,6 @@ struct mld2_query { #define mld2q_mrc mld2q_hdr.icmp6_maxdelay #define mld2q_resv1 mld2q_hdr.icmp6_dataun.un_data16[1] -/* Max Response Code, TODO: transform this to use the below */ -#define MLDV2_MASK(value, nb) ((nb)>=32 ? (value) : ((1<<(nb))-1) & (value)) -#define MLDV2_EXP(thresh, nbmant, nbexp, value) \ - ((value) < (thresh) ? (value) : \ - ((MLDV2_MASK(value, nbmant) | (1<<(nbmant))) << \ - (MLDV2_MASK((value) >> (nbmant), nbexp) + (nbexp)))) - -#define MLDV2_MRC(value) MLDV2_EXP(0x8000, 12, 3, value) - /* RFC3810, 5.1.3. Maximum Response Code: * * If Maximum Response Code >= 32768, Maximum Response Code represents a @@ -97,4 +88,23 @@ struct mld2_query { #define MLDV2_QQIC_EXP(value) (((value) >> 4) & 0x07) #define MLDV2_QQIC_MAN(value) ((value) & 0x0f) +static inline unsigned long mldv2_mrc(const struct mld2_query *mlh2) +{ + /* RFC3810, 5.1.3. Maximum Response Code */ + unsigned long ret, mc_mrc = ntohs(mlh2->mld2q_mrc); + + if (mc_mrc < 32768) { + ret = mc_mrc; + } else { + unsigned long mc_man, mc_exp; + + mc_exp = MLDV2_MRC_EXP(mc_mrc); + mc_man = MLDV2_MRC_MAN(mc_mrc); + + ret = (mc_man | 0x1000) << (mc_exp + 3); + } + + return ret; +} + #endif |