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authorXin Long <lucien.xin@gmail.com>2017-02-17 12:45:42 +0800
committerDavid S. Miller <davem@davemloft.net>2017-02-19 18:17:59 -0500
commit2040d3d7a36265d4a26af4e19a6a8a6154ab4bcc (patch)
tree2005d9eefb274a3818d38e3d615ee196bd27aa39 /net
parentea62504373fa9ff3ced27e07e1eac041888ecc46 (diff)
downloadlinux-2040d3d7a36265d4a26af4e19a6a8a6154ab4bcc.tar.bz2
sctp: add reconf chunk process
This patch is to add a function to process the incoming reconf chunk, in which it verifies the chunk, and traverses the param and process it with the right function one by one. sctp_sf_do_reconf would be the process function of reconf chunk event. Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/sctp/sm_statefuns.c54
1 files changed, 54 insertions, 0 deletions
diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c
index d8798ddda726..e03bb1aab4d0 100644
--- a/net/sctp/sm_statefuns.c
+++ b/net/sctp/sm_statefuns.c
@@ -3834,6 +3834,60 @@ sctp_disposition_t sctp_sf_do_asconf_ack(struct net *net,
return SCTP_DISPOSITION_DISCARD;
}
+/* RE-CONFIG Section 5.2 Upon reception of an RECONF Chunk. */
+sctp_disposition_t sctp_sf_do_reconf(struct net *net,
+ const struct sctp_endpoint *ep,
+ const struct sctp_association *asoc,
+ const sctp_subtype_t type, void *arg,
+ sctp_cmd_seq_t *commands)
+{
+ struct sctp_paramhdr *err_param = NULL;
+ struct sctp_chunk *chunk = arg;
+ struct sctp_reconf_chunk *hdr;
+ union sctp_params param;
+
+ if (!sctp_vtag_verify(chunk, asoc)) {
+ sctp_add_cmd_sf(commands, SCTP_CMD_REPORT_BAD_TAG,
+ SCTP_NULL());
+ return sctp_sf_pdiscard(net, ep, asoc, type, arg, commands);
+ }
+
+ /* Make sure that the RECONF chunk has a valid length. */
+ if (!sctp_chunk_length_valid(chunk, sizeof(*hdr)))
+ return sctp_sf_violation_chunklen(net, ep, asoc, type, arg,
+ commands);
+
+ if (!sctp_verify_reconf(asoc, chunk, &err_param))
+ return sctp_sf_violation_paramlen(net, ep, asoc, type, arg,
+ (void *)err_param, commands);
+
+ hdr = (struct sctp_reconf_chunk *)chunk->chunk_hdr;
+ sctp_walk_params(param, hdr, params) {
+ struct sctp_chunk *reply = NULL;
+ struct sctp_ulpevent *ev = NULL;
+
+ if (param.p->type == SCTP_PARAM_RESET_OUT_REQUEST)
+ reply = sctp_process_strreset_outreq(
+ (struct sctp_association *)asoc, param, &ev);
+ else if (param.p->type == SCTP_PARAM_RESET_IN_REQUEST)
+ reply = sctp_process_strreset_inreq(
+ (struct sctp_association *)asoc, param, &ev);
+ /* More handles for other types will be added here, by now it
+ * just ignores other types.
+ */
+
+ if (ev)
+ sctp_add_cmd_sf(commands, SCTP_CMD_EVENT_ULP,
+ SCTP_ULPEVENT(ev));
+
+ if (reply)
+ sctp_add_cmd_sf(commands, SCTP_CMD_REPLY,
+ SCTP_CHUNK(reply));
+ }
+
+ return SCTP_DISPOSITION_CONSUME;
+}
+
/*
* PR-SCTP Section 3.6 Receiver Side Implementation of PR-SCTP
*