diff options
Diffstat (limited to 'net/sctp/sm_statefuns.c')
| -rw-r--r-- | net/sctp/sm_statefuns.c | 52 |
1 files changed, 48 insertions, 4 deletions
diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c index a1be9d93f1a..0c9f37eb7d8 100644 --- a/net/sctp/sm_statefuns.c +++ b/net/sctp/sm_statefuns.c @@ -143,6 +143,12 @@ static sctp_ierror_t sctp_sf_authenticate(const struct sctp_endpoint *ep, const sctp_subtype_t type, struct sctp_chunk *chunk); +static sctp_disposition_t __sctp_sf_do_9_1_abort(const struct sctp_endpoint *ep, + const struct sctp_association *asoc, + const sctp_subtype_t type, + void *arg, + sctp_cmd_seq_t *commands); + /* Small helper function that checks if the chunk length * is of the appropriate length. The 'required_length' argument * is set to be the size of a specific chunk we are testing. @@ -2073,11 +2079,20 @@ sctp_disposition_t sctp_sf_shutdown_pending_abort( if (!sctp_chunk_length_valid(chunk, sizeof(sctp_abort_chunk_t))) return sctp_sf_pdiscard(ep, asoc, type, arg, commands); + /* ADD-IP: Special case for ABORT chunks + * F4) One special consideration is that ABORT Chunks arriving + * destined to the IP address being deleted MUST be + * ignored (see Section 5.3.1 for further details). + */ + if (SCTP_ADDR_DEL == + sctp_bind_addr_state(&asoc->base.bind_addr, &chunk->dest)) + return sctp_sf_discard_chunk(ep, asoc, type, arg, commands); + /* Stop the T5-shutdown guard timer. */ sctp_add_cmd_sf(commands, SCTP_CMD_TIMER_STOP, SCTP_TO(SCTP_EVENT_TIMEOUT_T5_SHUTDOWN_GUARD)); - return sctp_sf_do_9_1_abort(ep, asoc, type, arg, commands); + return __sctp_sf_do_9_1_abort(ep, asoc, type, arg, commands); } /* @@ -2109,6 +2124,15 @@ sctp_disposition_t sctp_sf_shutdown_sent_abort(const struct sctp_endpoint *ep, if (!sctp_chunk_length_valid(chunk, sizeof(sctp_abort_chunk_t))) return sctp_sf_pdiscard(ep, asoc, type, arg, commands); + /* ADD-IP: Special case for ABORT chunks + * F4) One special consideration is that ABORT Chunks arriving + * destined to the IP address being deleted MUST be + * ignored (see Section 5.3.1 for further details). + */ + if (SCTP_ADDR_DEL == + sctp_bind_addr_state(&asoc->base.bind_addr, &chunk->dest)) + return sctp_sf_discard_chunk(ep, asoc, type, arg, commands); + /* Stop the T2-shutdown timer. */ sctp_add_cmd_sf(commands, SCTP_CMD_TIMER_STOP, SCTP_TO(SCTP_EVENT_TIMEOUT_T2_SHUTDOWN)); @@ -2117,7 +2141,7 @@ sctp_disposition_t sctp_sf_shutdown_sent_abort(const struct sctp_endpoint *ep, sctp_add_cmd_sf(commands, SCTP_CMD_TIMER_STOP, SCTP_TO(SCTP_EVENT_TIMEOUT_T5_SHUTDOWN_GUARD)); - return sctp_sf_do_9_1_abort(ep, asoc, type, arg, commands); + return __sctp_sf_do_9_1_abort(ep, asoc, type, arg, commands); } /* @@ -2344,8 +2368,6 @@ sctp_disposition_t sctp_sf_do_9_1_abort(const struct sctp_endpoint *ep, sctp_cmd_seq_t *commands) { struct sctp_chunk *chunk = arg; - unsigned len; - __be16 error = SCTP_ERROR_NO_ERROR; if (!sctp_vtag_verify_either(chunk, asoc)) return sctp_sf_pdiscard(ep, asoc, type, arg, commands); @@ -2363,6 +2385,28 @@ sctp_disposition_t sctp_sf_do_9_1_abort(const struct sctp_endpoint *ep, if (!sctp_chunk_length_valid(chunk, sizeof(sctp_abort_chunk_t))) return sctp_sf_pdiscard(ep, asoc, type, arg, commands); + /* ADD-IP: Special case for ABORT chunks + * F4) One special consideration is that ABORT Chunks arriving + * destined to the IP address being deleted MUST be + * ignored (see Section 5.3.1 for further details). + */ + if (SCTP_ADDR_DEL == + sctp_bind_addr_state(&asoc->base.bind_addr, &chunk->dest)) + return sctp_sf_discard_chunk(ep, asoc, type, arg, commands); + + return __sctp_sf_do_9_1_abort(ep, asoc, type, arg, commands); +} + +static sctp_disposition_t __sctp_sf_do_9_1_abort(const struct sctp_endpoint *ep, + const struct sctp_association *asoc, + const sctp_subtype_t type, + void *arg, + sctp_cmd_seq_t *commands) +{ + struct sctp_chunk *chunk = arg; + unsigned len; + __be16 error = SCTP_ERROR_NO_ERROR; + /* See if we have an error cause code in the chunk. */ len = ntohs(chunk->chunk_hdr->length); if (len >= sizeof(struct sctp_chunkhdr) + sizeof(struct sctp_errhdr)) |