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| author | Xin Long <lucien.xin@gmail.com> | 2017-12-08 21:04:03 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-12-11 11:23:04 -0500 |
| commit | 9d4ceaf154a947e69648041bcb11a24a7a40c380 (patch) | |
| tree | cafd57b388beae222ead30af268636082af7e237 /include/net/sctp | |
| parent | 668c9beb9020d5834ee9e43c208190a07d2b1928 (diff) | |
| download | linux-9d4ceaf154a947e69648041bcb11a24a7a40c380.tar.bz2 | |
sctp: implement validate_data for sctp_stream_interleave
validate_data is added as a member of sctp_stream_interleave, used
to validate ssn/chunk type for data or mid (message id)/chunk type
for idata, called in sctp_eat_data.
If this check fails, an abort packet will be sent, as said in
section 2.2.3 of RFC8260.
It also adds the process for idata in rx path. As Marcelo pointed
out, there's no need to add event table for idata, but just share
chunk_event_table with data's. It would drop data chunk for idata
and drop idata chunk for data by calling validate_data in
sctp_eat_data.
As last patch did, it also replaces sizeof(struct sctp_data_chunk)
with sctp_datachk_len for rx path.
After this patch, the idata can be accepted and delivered to ulp
layer.
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/sctp')
| -rw-r--r-- | include/net/sctp/sm.h | 6 | ||||
| -rw-r--r-- | include/net/sctp/stream_interleave.h | 1 | ||||
| -rw-r--r-- | include/net/sctp/structs.h | 6 |
3 files changed, 12 insertions, 1 deletions
diff --git a/include/net/sctp/sm.h b/include/net/sctp/sm.h index ca1db8997e5d..0993b4953b3a 100644 --- a/include/net/sctp/sm.h +++ b/include/net/sctp/sm.h @@ -359,6 +359,12 @@ static inline __u16 sctp_data_size(struct sctp_chunk *chunk) typecheck(__u32, b) && \ ((__s32)((a) - (b)) <= 0)) +/* Compare two MIDs */ +#define MID_lt(a, b) \ + (typecheck(__u32, a) && \ + typecheck(__u32, b) && \ + ((__s32)((a) - (b)) < 0)) + /* Compare two SSNs */ #define SSN_lt(a,b) \ (typecheck(__u16, a) && \ diff --git a/include/net/sctp/stream_interleave.h b/include/net/sctp/stream_interleave.h index 99f399e7a871..d8d1b51e1362 100644 --- a/include/net/sctp/stream_interleave.h +++ b/include/net/sctp/stream_interleave.h @@ -38,6 +38,7 @@ struct sctp_stream_interleave { const struct sctp_sndrcvinfo *sinfo, int len, __u8 flags, gfp_t gfp); void (*assign_number)(struct sctp_chunk *chunk); + bool (*validate_data)(struct sctp_chunk *chunk); }; void sctp_stream_interleave_init(struct sctp_stream *stream); diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h index fd93973bb667..be4cc73f3106 100644 --- a/include/net/sctp/structs.h +++ b/include/net/sctp/structs.h @@ -1382,7 +1382,11 @@ struct sctp_stream_out { }; struct sctp_stream_in { - __u16 ssn; + union { + __u32 mid; + __u16 ssn; + }; + __u32 fsn; }; struct sctp_stream { |