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-rw-r--r--include/net/sctp/sm.h6
-rw-r--r--include/net/sctp/stream_interleave.h1
-rw-r--r--include/net/sctp/structs.h6
-rw-r--r--net/sctp/sm_statefuns.c21
-rw-r--r--net/sctp/sm_statetable.c3
-rw-r--r--net/sctp/stream_interleave.c39
6 files changed, 62 insertions, 14 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 {
diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c
index 8f8ccded13e4..c609c5409910 100644
--- a/net/sctp/sm_statefuns.c
+++ b/net/sctp/sm_statefuns.c
@@ -3013,7 +3013,7 @@ enum sctp_disposition sctp_sf_eat_data_6_2(struct net *net,
return sctp_sf_pdiscard(net, ep, asoc, type, arg, commands);
}
- if (!sctp_chunk_length_valid(chunk, sizeof(struct sctp_data_chunk)))
+ if (!sctp_chunk_length_valid(chunk, sctp_datachk_len(&asoc->stream)))
return sctp_sf_violation_chunklen(net, ep, asoc, type, arg,
commands);
@@ -3034,7 +3034,7 @@ enum sctp_disposition sctp_sf_eat_data_6_2(struct net *net,
case SCTP_IERROR_PROTO_VIOLATION:
return sctp_sf_abort_violation(net, ep, asoc, chunk, commands,
(u8 *)chunk->subh.data_hdr,
- sizeof(struct sctp_datahdr));
+ sctp_datahdr_len(&asoc->stream));
default:
BUG();
}
@@ -3133,7 +3133,7 @@ enum sctp_disposition sctp_sf_eat_data_fast_4_4(
return sctp_sf_pdiscard(net, ep, asoc, type, arg, commands);
}
- if (!sctp_chunk_length_valid(chunk, sizeof(struct sctp_data_chunk)))
+ if (!sctp_chunk_length_valid(chunk, sctp_datachk_len(&asoc->stream)))
return sctp_sf_violation_chunklen(net, ep, asoc, type, arg,
commands);
@@ -3150,7 +3150,7 @@ enum sctp_disposition sctp_sf_eat_data_fast_4_4(
case SCTP_IERROR_PROTO_VIOLATION:
return sctp_sf_abort_violation(net, ep, asoc, chunk, commands,
(u8 *)chunk->subh.data_hdr,
- sizeof(struct sctp_datahdr));
+ sctp_datahdr_len(&asoc->stream));
default:
BUG();
}
@@ -6244,14 +6244,12 @@ static int sctp_eat_data(const struct sctp_association *asoc,
struct sctp_chunk *err;
enum sctp_verb deliver;
size_t datalen;
- u8 ordered = 0;
- u16 ssn, sid;
__u32 tsn;
int tmp;
data_hdr = (struct sctp_datahdr *)chunk->skb->data;
chunk->subh.data_hdr = data_hdr;
- skb_pull(chunk->skb, sizeof(*data_hdr));
+ skb_pull(chunk->skb, sctp_datahdr_len(&asoc->stream));
tsn = ntohl(data_hdr->tsn);
pr_debug("%s: TSN 0x%x\n", __func__, tsn);
@@ -6299,7 +6297,7 @@ static int sctp_eat_data(const struct sctp_association *asoc,
* Actually, allow a little bit of overflow (up to a MTU).
*/
datalen = ntohs(chunk->chunk_hdr->length);
- datalen -= sizeof(struct sctp_data_chunk);
+ datalen -= sctp_datachk_len(&asoc->stream);
deliver = SCTP_CMD_CHUNK_ULP;
@@ -6394,7 +6392,6 @@ static int sctp_eat_data(const struct sctp_association *asoc,
SCTP_INC_STATS(net, SCTP_MIB_INORDERCHUNKS);
if (chunk->asoc)
chunk->asoc->stats.iodchunks++;
- ordered = 1;
}
/* RFC 2960 6.5 Stream Identifier and Stream Sequence Number
@@ -6405,8 +6402,7 @@ static int sctp_eat_data(const struct sctp_association *asoc,
* with cause set to "Invalid Stream Identifier" (See Section 3.3.10)
* and discard the DATA chunk.
*/
- sid = ntohs(data_hdr->stream);
- if (sid >= asoc->stream.incnt) {
+ if (ntohs(data_hdr->stream) >= asoc->stream.incnt) {
/* Mark tsn as received even though we drop it */
sctp_add_cmd_sf(commands, SCTP_CMD_REPORT_TSN, SCTP_U32(tsn));
@@ -6427,8 +6423,7 @@ static int sctp_eat_data(const struct sctp_association *asoc,
* SSN is smaller then the next expected one. If it is, it wrapped
* and is invalid.
*/
- ssn = ntohs(data_hdr->ssn);
- if (ordered && SSN_lt(ssn, sctp_ssn_peek(&asoc->stream, in, sid)))
+ if (!asoc->stream.si->validate_data(chunk))
return SCTP_IERROR_PROTO_VIOLATION;
/* Send the data up to the user. Note: Schedule the
diff --git a/net/sctp/sm_statetable.c b/net/sctp/sm_statetable.c
index 79b6bee5b768..8c9bb4109f47 100644
--- a/net/sctp/sm_statetable.c
+++ b/net/sctp/sm_statetable.c
@@ -985,6 +985,9 @@ static const struct sctp_sm_table_entry *sctp_chunk_event_lookup(
if (state > SCTP_STATE_MAX)
return &bug;
+ if (net->sctp.intl_enable && cid == SCTP_CID_I_DATA)
+ cid = SCTP_CID_DATA;
+
if (cid <= SCTP_CID_BASE_MAX)
return &chunk_event_table[cid][state];
diff --git a/net/sctp/stream_interleave.c b/net/sctp/stream_interleave.c
index 3ac47e78c013..3d8733be6f7a 100644
--- a/net/sctp/stream_interleave.c
+++ b/net/sctp/stream_interleave.c
@@ -92,11 +92,49 @@ static void sctp_chunk_assign_mid(struct sctp_chunk *chunk)
}
}
+static bool sctp_validate_data(struct sctp_chunk *chunk)
+{
+ const struct sctp_stream *stream;
+ __u16 sid, ssn;
+
+ if (chunk->chunk_hdr->type != SCTP_CID_DATA)
+ return false;
+
+ if (chunk->chunk_hdr->flags & SCTP_DATA_UNORDERED)
+ return true;
+
+ stream = &chunk->asoc->stream;
+ sid = sctp_chunk_stream_no(chunk);
+ ssn = ntohs(chunk->subh.data_hdr->ssn);
+
+ return !SSN_lt(ssn, sctp_ssn_peek(stream, in, sid));
+}
+
+static bool sctp_validate_idata(struct sctp_chunk *chunk)
+{
+ struct sctp_stream *stream;
+ __u32 mid;
+ __u16 sid;
+
+ if (chunk->chunk_hdr->type != SCTP_CID_I_DATA)
+ return false;
+
+ if (chunk->chunk_hdr->flags & SCTP_DATA_UNORDERED)
+ return true;
+
+ stream = &chunk->asoc->stream;
+ sid = sctp_chunk_stream_no(chunk);
+ mid = ntohl(chunk->subh.idata_hdr->mid);
+
+ return !MID_lt(mid, sctp_mid_peek(stream, in, sid));
+}
+
static struct sctp_stream_interleave sctp_stream_interleave_0 = {
.data_chunk_len = sizeof(struct sctp_data_chunk),
/* DATA process functions */
.make_datafrag = sctp_make_datafrag_empty,
.assign_number = sctp_chunk_assign_ssn,
+ .validate_data = sctp_validate_data,
};
static struct sctp_stream_interleave sctp_stream_interleave_1 = {
@@ -104,6 +142,7 @@ static struct sctp_stream_interleave sctp_stream_interleave_1 = {
/* I-DATA process functions */
.make_datafrag = sctp_make_idatafrag_empty,
.assign_number = sctp_chunk_assign_mid,
+ .validate_data = sctp_validate_idata,
};
void sctp_stream_interleave_init(struct sctp_stream *stream)