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authorXin Long <lucien.xin@gmail.com>2021-04-30 23:03:00 +0300
committerDavid S. Miller <davem@davemloft.net>2021-05-01 01:06:34 +0300
commit51eac7f2f06b5f60d22dfb06c48d98a227507b8e (patch)
tree5f5a2a3eeae31dce1af489113c3e1792fa834ee6 /net/sctp/sm_statefuns.c
parent7e9269a5acec6d841d22e12770a0b02db4f5d8f2 (diff)
downloadlinux-51eac7f2f06b5f60d22dfb06c48d98a227507b8e.tar.xz
sctp: do asoc update earlier in sctp_sf_do_dupcook_b
The same thing should be done for sctp_sf_do_dupcook_b(). Meanwhile, SCTP_CMD_UPDATE_ASSOC cmd can be removed. v1->v2: - Fix the return value in sctp_sf_do_assoc_update(). Signed-off-by: Xin Long <lucien.xin@gmail.com> Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sctp/sm_statefuns.c')
-rw-r--r--net/sctp/sm_statefuns.c47
1 files changed, 30 insertions, 17 deletions
diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c
index e8ccc4e8b086..a42844904b81 100644
--- a/net/sctp/sm_statefuns.c
+++ b/net/sctp/sm_statefuns.c
@@ -1773,6 +1773,30 @@ enum sctp_disposition sctp_sf_do_5_2_3_initack(
return sctp_sf_discard_chunk(net, ep, asoc, type, arg, commands);
}
+static int sctp_sf_do_assoc_update(struct sctp_association *asoc,
+ struct sctp_association *new,
+ struct sctp_cmd_seq *cmds)
+{
+ struct net *net = asoc->base.net;
+ struct sctp_chunk *abort;
+
+ if (!sctp_assoc_update(asoc, new))
+ return 0;
+
+ abort = sctp_make_abort(asoc, NULL, sizeof(struct sctp_errhdr));
+ if (abort) {
+ sctp_init_cause(abort, SCTP_ERROR_RSRC_LOW, 0);
+ sctp_add_cmd_sf(cmds, SCTP_CMD_REPLY, SCTP_CHUNK(abort));
+ }
+ sctp_add_cmd_sf(cmds, SCTP_CMD_SET_SK_ERR, SCTP_ERROR(ECONNABORTED));
+ sctp_add_cmd_sf(cmds, SCTP_CMD_ASSOC_FAILED,
+ SCTP_PERR(SCTP_ERROR_RSRC_LOW));
+ SCTP_INC_STATS(net, SCTP_MIB_ABORTEDS);
+ SCTP_DEC_STATS(net, SCTP_MIB_CURRESTAB);
+
+ return -ENOMEM;
+}
+
/* Unexpected COOKIE-ECHO handler for peer restart (Table 2, action 'A')
*
* Section 5.2.4
@@ -1853,21 +1877,8 @@ static enum sctp_disposition sctp_sf_do_dupcook_a(
sctp_add_cmd_sf(commands, SCTP_CMD_PURGE_ASCONF_QUEUE, SCTP_NULL());
/* Update the content of current association. */
- if (sctp_assoc_update((struct sctp_association *)asoc, new_asoc)) {
- struct sctp_chunk *abort;
-
- abort = sctp_make_abort(asoc, NULL, sizeof(struct sctp_errhdr));
- if (abort) {
- sctp_init_cause(abort, SCTP_ERROR_RSRC_LOW, 0);
- sctp_add_cmd_sf(commands, SCTP_CMD_REPLY, SCTP_CHUNK(abort));
- }
- sctp_add_cmd_sf(commands, SCTP_CMD_SET_SK_ERR, SCTP_ERROR(ECONNABORTED));
- sctp_add_cmd_sf(commands, SCTP_CMD_ASSOC_FAILED,
- SCTP_PERR(SCTP_ERROR_RSRC_LOW));
- SCTP_INC_STATS(net, SCTP_MIB_ABORTEDS);
- SCTP_DEC_STATS(net, SCTP_MIB_CURRESTAB);
+ if (sctp_sf_do_assoc_update((struct sctp_association *)asoc, new_asoc, commands))
goto nomem;
- }
repl = sctp_make_cookie_ack(asoc, chunk);
if (!repl)
@@ -1940,14 +1951,16 @@ static enum sctp_disposition sctp_sf_do_dupcook_b(
if (!sctp_auth_chunk_verify(net, chunk, new_asoc))
return SCTP_DISPOSITION_DISCARD;
- /* Update the content of current association. */
- sctp_add_cmd_sf(commands, SCTP_CMD_UPDATE_ASSOC, SCTP_ASOC(new_asoc));
sctp_add_cmd_sf(commands, SCTP_CMD_NEW_STATE,
SCTP_STATE(SCTP_STATE_ESTABLISHED));
SCTP_INC_STATS(net, SCTP_MIB_CURRESTAB);
sctp_add_cmd_sf(commands, SCTP_CMD_HB_TIMERS_START, SCTP_NULL());
- repl = sctp_make_cookie_ack(new_asoc, chunk);
+ /* Update the content of current association. */
+ if (sctp_sf_do_assoc_update((struct sctp_association *)asoc, new_asoc, commands))
+ goto nomem;
+
+ repl = sctp_make_cookie_ack(asoc, chunk);
if (!repl)
goto nomem;