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authorMarco Varlese <marco.varlese@suse.com>2018-02-27 09:38:31 +0100
committerDamjan Marion <dmarion.lists@gmail.com>2018-02-28 05:54:43 +0000
commit8c5f67f2b883ad9dcb489ab0eb16e1acbe478926 (patch)
tree6fe63e6814e812f79b07950e29ef8a425b579b88 /src/vnet/sctp/sctp_output.c
parentac0932d26c17b8d82af1a7d033e1abdccb6f7209 (diff)
SCTP: handle COOKIE while in SHUTDOWN phase
This patch address the requirement to handle a COOKIE chunk whilst in SHUTDOWN phase. The COOKIE shouldn't just be dropped but an OPERATION ERROR chunk shall be sent to the peer to inform about the current situation. Change-Id: I1a47652402d49cfee3b0c810304d7902f3a62f40 Signed-off-by: Marco Varlese <marco.varlese@suse.com>
Diffstat (limited to 'src/vnet/sctp/sctp_output.c')
-rw-r--r--src/vnet/sctp/sctp_output.c27
1 files changed, 15 insertions, 12 deletions
diff --git a/src/vnet/sctp/sctp_output.c b/src/vnet/sctp/sctp_output.c
index b7351275486..0c2fee1bb69 100644
--- a/src/vnet/sctp/sctp_output.c
+++ b/src/vnet/sctp/sctp_output.c
@@ -589,24 +589,23 @@ sctp_prepare_cookie_echo_chunk (sctp_connection_t * sctp_conn, u8 idx,
}
/**
- * Convert buffer to ABORT
+ * Convert buffer to ERROR
*/
-/*
void
sctp_prepare_operation_error (sctp_connection_t * sctp_conn, u8 idx,
- vlib_buffer_t * b, ip4_address_t * ip4_addr,
- ip6_address_t * ip6_addr)
+ vlib_buffer_t * b, u8 err_cause)
{
vlib_main_t *vm = vlib_get_main ();
sctp_reuse_buffer (vm, b);
- // The minimum size of the message is given by the sctp_operation_error_t
- u16 alloc_bytes = sizeof (sctp_operation_error_t);
+ /* The minimum size of the message is given by the sctp_operation_error_t */
+ u16 alloc_bytes =
+ sizeof (sctp_operation_error_t) + sizeof (sctp_err_cause_param_t);
- // As per RFC 4960 the chunk_length value does NOT contemplate
- // the size of the first header (see sctp_header_t) and any padding
- //
+ /* As per RFC 4960 the chunk_length value does NOT contemplate
+ * the size of the first header (see sctp_header_t) and any padding
+ */
u16 chunk_len = alloc_bytes - sizeof (sctp_header_t);
alloc_bytes += vnet_sctp_calculate_padding (alloc_bytes);
@@ -614,13 +613,18 @@ sctp_prepare_operation_error (sctp_connection_t * sctp_conn, u8 idx,
sctp_operation_error_t *err_chunk =
vlib_buffer_push_uninit (b, alloc_bytes);
- // src_port & dst_port are already in network byte-order
+ /* src_port & dst_port are already in network byte-order */
err_chunk->sctp_hdr.checksum = 0;
err_chunk->sctp_hdr.src_port = sctp_conn->sub_conn[idx].connection.lcl_port;
err_chunk->sctp_hdr.dst_port = sctp_conn->sub_conn[idx].connection.rmt_port;
- // As per RFC4960 Section 5.2.2: copy the INITIATE_TAG into the VERIFICATION_TAG of the ABORT chunk
+ /* As per RFC4960 Section 5.2.2: copy the INITIATE_TAG into the VERIFICATION_TAG of the ABORT chunk */
err_chunk->sctp_hdr.verification_tag = sctp_conn->local_tag;
+ err_chunk->err_causes[0].param_hdr.length =
+ clib_host_to_net_u16 (sizeof (err_chunk->err_causes[0].param_hdr.type) +
+ sizeof (err_chunk->err_causes[0].param_hdr.length));
+ err_chunk->err_causes[0].param_hdr.type = clib_host_to_net_u16 (err_cause);
+
vnet_sctp_set_chunk_type (&err_chunk->chunk_hdr, OPERATION_ERROR);
vnet_sctp_set_chunk_length (&err_chunk->chunk_hdr, chunk_len);
@@ -628,7 +632,6 @@ sctp_prepare_operation_error (sctp_connection_t * sctp_conn, u8 idx,
sctp_conn->sub_conn[idx].connection.c_index;
vnet_buffer (b)->sctp.subconn_idx = idx;
}
-*/
/**
* Convert buffer to ABORT