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| author | Vlad Yasevich <vladislav.yasevich@hp.com> | 2009-09-04 18:21:00 -0400 |
|---|---|---|
| committer | Vlad Yasevich <vladislav.yasevich@hp.com> | 2009-09-04 18:21:00 -0400 |
| commit | f68b2e05f326971cd76c65aa91a1a41771dd7485 (patch) | |
| tree | 2940d83f3787570cc030791378ee23b89b941662 /include/net | |
| parent | cb95ea32a457871f72752164de8d94fa20f4703c (diff) | |
| download | linux-f68b2e05f326971cd76c65aa91a1a41771dd7485.tar.gz linux-f68b2e05f326971cd76c65aa91a1a41771dd7485.tar.bz2 linux-f68b2e05f326971cd76c65aa91a1a41771dd7485.zip | |
sctp: Fix SCTP_MAXSEG socket option to comply to spec.
We had a bug that we never stored the user-defined value for
MAXSEG when setting the value on an association. Thus future
PMTU events ended up re-writing the frag point and increasing
it past user limit. Additionally, when setting the option on
the socket/endpoint, we effect all current associations, which
is against spec.
Now, we store the user 'maxseg' value along with the computed
'frag_point'. We inherit 'maxseg' from the socket at association
creation and use it as an upper limit for 'frag_point' when its
set.
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/sctp/sctp.h | 7 | ||||
| -rw-r--r-- | include/net/sctp/structs.h | 1 |
2 files changed, 5 insertions, 3 deletions
diff --git a/include/net/sctp/sctp.h b/include/net/sctp/sctp.h index d16a304cbed4..8a6d5297de16 100644 --- a/include/net/sctp/sctp.h +++ b/include/net/sctp/sctp.h @@ -486,15 +486,16 @@ static inline __s32 sctp_jitter(__u32 rto) } /* Break down data chunks at this point. */ -static inline int sctp_frag_point(const struct sctp_sock *sp, int pmtu) +static inline int sctp_frag_point(const struct sctp_association *asoc, int pmtu) { + struct sctp_sock *sp = sctp_sk(asoc->base.sk); int frag = pmtu; frag -= sp->pf->af->net_header_len; frag -= sizeof(struct sctphdr) + sizeof(struct sctp_data_chunk); - if (sp->user_frag) - frag = min_t(int, frag, sp->user_frag); + if (asoc->user_frag) + frag = min_t(int, frag, asoc->user_frag); frag = min_t(int, frag, SCTP_MAX_CHUNK_LEN); diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h index df4c6321996d..b10612810f56 100644 --- a/include/net/sctp/structs.h +++ b/include/net/sctp/structs.h @@ -1763,6 +1763,7 @@ struct sctp_association { /* The message size at which SCTP fragmentation will occur. */ __u32 frag_point; + __u32 user_frag; /* Counter used to count INIT errors. */ int init_err_counter; |