diff options
| author | Xin Long <lucien.xin@gmail.com> | 2017-02-17 12:45:42 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-02-19 18:17:59 -0500 |
| commit | 2040d3d7a36265d4a26af4e19a6a8a6154ab4bcc (patch) | |
| tree | 2005d9eefb274a3818d38e3d615ee196bd27aa39 | |
| parent | ea62504373fa9ff3ced27e07e1eac041888ecc46 (diff) | |
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>
| -rw-r--r-- | include/net/sctp/sm.h | 1 | ||||
| -rw-r--r-- | net/sctp/sm_statefuns.c | 54 |
2 files changed, 55 insertions, 0 deletions
diff --git a/include/net/sctp/sm.h b/include/net/sctp/sm.h index ca9fbfb2084c..b6f682ec184a 100644 --- a/include/net/sctp/sm.h +++ b/include/net/sctp/sm.h @@ -135,6 +135,7 @@ sctp_state_fn_t sctp_sf_do_8_5_1_E_sa; sctp_state_fn_t sctp_sf_cookie_echoed_err; sctp_state_fn_t sctp_sf_do_asconf; sctp_state_fn_t sctp_sf_do_asconf_ack; +sctp_state_fn_t sctp_sf_do_reconf; sctp_state_fn_t sctp_sf_do_9_2_reshutack; sctp_state_fn_t sctp_sf_eat_fwd_tsn; sctp_state_fn_t sctp_sf_eat_fwd_tsn_fast; 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 * |