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sctp: add reconf chunk process

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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>
This commit is contained in:
Xin Long 2017-02-17 12:45:42 +08:00 committed by David S. Miller
parent ea62504373
commit 2040d3d7a3
2 changed files with 55 additions and 0 deletions
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1
include/net/sctp/sm.h
View File

@ -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;

54
net/sctp/sm_statefuns.c
View File

@ -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
*