diff options
| -rw-r--r-- | include/net/sctp/structs.h | 2 | ||||
| -rw-r--r-- | net/sctp/bind_addr.c | 26 | ||||
| -rw-r--r-- | net/sctp/sm_statefuns.c | 52 |
3 files changed, 76 insertions, 4 deletions
diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h index 2528f8a..4d591bf 100644 --- a/include/net/sctp/structs.h +++ b/include/net/sctp/structs.h @@ -1200,6 +1200,8 @@ int sctp_add_bind_addr(struct sctp_bind_addr *, union sctp_addr *, int sctp_del_bind_addr(struct sctp_bind_addr *, union sctp_addr *); int sctp_bind_addr_match(struct sctp_bind_addr *, const union sctp_addr *, struct sctp_sock *); +int sctp_bind_addr_state(const struct sctp_bind_addr *bp, + const union sctp_addr *addr); union sctp_addr *sctp_find_unmatch_addr(struct sctp_bind_addr *bp, const union sctp_addr *addrs, int addrcnt, diff --git a/net/sctp/bind_addr.c b/net/sctp/bind_addr.c index 4326611..13fbfb4 100644 --- a/net/sctp/bind_addr.c +++ b/net/sctp/bind_addr.c @@ -353,6 +353,32 @@ int sctp_bind_addr_match(struct sctp_bind_addr *bp, return match; } +/* Get the state of the entry in the bind_addr_list */ +int sctp_bind_addr_state(const struct sctp_bind_addr *bp, + const union sctp_addr *addr) +{ + struct sctp_sockaddr_entry *laddr; + struct sctp_af *af; + int state = -1; + + af = sctp_get_af_specific(addr->sa.sa_family); + if (unlikely(!af)) + return state; + + rcu_read_lock(); + list_for_each_entry_rcu(laddr, &bp->address_list, list) { + if (!laddr->valid) + continue; + if (af->cmp_addr(&laddr->a, addr)) { + state = laddr->state; + break; + } + } + rcu_read_unlock(); + + return state; +} + /* Find the first address in the bind address list that is not present in * the addrs packed array. */ diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c index a1be9d9..0c9f37e 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)) |