diff options
Diffstat (limited to 'net/sctp/sm_statefuns.c')
| -rw-r--r-- | net/sctp/sm_statefuns.c | 162 |
1 files changed, 111 insertions, 51 deletions
diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c index 8e01b8f09ac2..86073df418f5 100644 --- a/net/sctp/sm_statefuns.c +++ b/net/sctp/sm_statefuns.c @@ -92,6 +92,17 @@ static sctp_disposition_t sctp_sf_shut_8_4_5(const struct sctp_endpoint *ep, sctp_cmd_seq_t *commands); static struct sctp_sackhdr *sctp_sm_pull_sack(struct sctp_chunk *chunk); +static sctp_disposition_t sctp_stop_t1_and_abort(sctp_cmd_seq_t *commands, + __u16 error, + const struct sctp_association *asoc, + struct sctp_transport *transport); + +static sctp_disposition_t sctp_sf_violation_chunklen( + 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 @@ -533,6 +544,9 @@ sctp_disposition_t sctp_sf_do_5_1C_ack(const struct sctp_endpoint *ep, sctp_add_cmd_sf(commands, SCTP_CMD_PEER_INIT, SCTP_PEER_INIT(initchunk)); + /* Reset init error count upon receipt of INIT-ACK. */ + sctp_add_cmd_sf(commands, SCTP_CMD_INIT_COUNTER_RESET, SCTP_NULL()); + /* 5.1 C) "A" shall stop the T1-init timer and leave * COOKIE-WAIT state. "A" shall then ... start the T1-cookie * timer, and enter the COOKIE-ECHOED state. @@ -775,8 +789,7 @@ sctp_disposition_t sctp_sf_do_5_1E_ca(const struct sctp_endpoint *ep, * from the COOKIE-ECHOED state to the COOKIE-WAIT * state is performed. */ - sctp_add_cmd_sf(commands, SCTP_CMD_COUNTER_RESET, - SCTP_COUNTER(SCTP_COUNTER_INIT_ERROR)); + sctp_add_cmd_sf(commands, SCTP_CMD_INIT_COUNTER_RESET, SCTP_NULL()); /* RFC 2960 5.1 Normal Establishment of an Association * @@ -1019,10 +1032,22 @@ sctp_disposition_t sctp_sf_backbeat_8_3(const struct sctp_endpoint *ep, link = sctp_assoc_lookup_paddr(asoc, &from_addr); /* This should never happen, but lets log it if so. */ - if (!link) { - printk(KERN_WARNING - "%s: Could not find address %d.%d.%d.%d\n", - __FUNCTION__, NIPQUAD(from_addr.v4.sin_addr)); + if (unlikely(!link)) { + if (from_addr.sa.sa_family == AF_INET6) { + printk(KERN_WARNING + "%s association %p could not find address " + "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n", + __FUNCTION__, + asoc, + NIP6(from_addr.v6.sin6_addr)); + } else { + printk(KERN_WARNING + "%s association %p could not find address " + "%u.%u.%u.%u\n", + __FUNCTION__, + asoc, + NIPQUAD(from_addr.v4.sin_addr.s_addr)); + } return SCTP_DISPOSITION_DISCARD; } @@ -2095,9 +2120,7 @@ static sctp_disposition_t sctp_sf_do_5_2_6_stale(const struct sctp_endpoint *ep, sctp_errhdr_t *err; struct sctp_chunk *reply; struct sctp_bind_addr *bp; - int attempts; - - attempts = asoc->counters[SCTP_COUNTER_INIT_ERROR] + 1; + int attempts = asoc->init_err_counter + 1; if (attempts >= asoc->max_init_attempts) { sctp_add_cmd_sf(commands, SCTP_CMD_INIT_FAILED, @@ -2157,8 +2180,7 @@ static sctp_disposition_t sctp_sf_do_5_2_6_stale(const struct sctp_endpoint *ep, /* Cast away the const modifier, as we want to just * rerun it through as a sideffect. */ - sctp_add_cmd_sf(commands, SCTP_CMD_COUNTER_INC, - SCTP_COUNTER(SCTP_COUNTER_INIT_ERROR)); + sctp_add_cmd_sf(commands, SCTP_CMD_INIT_COUNTER_INC, SCTP_NULL()); sctp_add_cmd_sf(commands, SCTP_CMD_TIMER_STOP, SCTP_TO(SCTP_EVENT_TIMEOUT_T1_COOKIE)); @@ -2281,8 +2303,7 @@ sctp_disposition_t sctp_sf_cookie_wait_abort(const struct sctp_endpoint *ep, if (len >= sizeof(struct sctp_chunkhdr) + sizeof(struct sctp_errhdr)) error = ((sctp_errhdr_t *)chunk->skb->data)->cause; - sctp_stop_t1_and_abort(commands, error); - return SCTP_DISPOSITION_ABORT; + return sctp_stop_t1_and_abort(commands, error, asoc, chunk->transport); } /* @@ -2294,8 +2315,8 @@ sctp_disposition_t sctp_sf_cookie_wait_icmp_abort(const struct sctp_endpoint *ep void *arg, sctp_cmd_seq_t *commands) { - sctp_stop_t1_and_abort(commands, SCTP_ERROR_NO_ERROR); - return SCTP_DISPOSITION_ABORT; + return sctp_stop_t1_and_abort(commands, SCTP_ERROR_NO_ERROR, asoc, + (struct sctp_transport *)arg); } /* @@ -2318,8 +2339,12 @@ sctp_disposition_t sctp_sf_cookie_echoed_abort(const struct sctp_endpoint *ep, * * This is common code called by several sctp_sf_*_abort() functions above. */ -void sctp_stop_t1_and_abort(sctp_cmd_seq_t *commands, __u16 error) +static sctp_disposition_t sctp_stop_t1_and_abort(sctp_cmd_seq_t *commands, + __u16 error, + const struct sctp_association *asoc, + struct sctp_transport *transport) { + SCTP_DEBUG_PRINTK("ABORT received (INIT).\n"); sctp_add_cmd_sf(commands, SCTP_CMD_NEW_STATE, SCTP_STATE(SCTP_STATE_CLOSED)); SCTP_INC_STATS(SCTP_MIB_ABORTEDS); @@ -2328,6 +2353,7 @@ void sctp_stop_t1_and_abort(sctp_cmd_seq_t *commands, __u16 error) /* CMD_INIT_FAILED will DELETE_TCB. */ sctp_add_cmd_sf(commands, SCTP_CMD_INIT_FAILED, SCTP_U32(error)); + return SCTP_DISPOSITION_ABORT; } /* @@ -3672,7 +3698,8 @@ sctp_disposition_t sctp_sf_violation(const struct sctp_endpoint *ep, * * Generate an ABORT chunk and terminate the association. */ -sctp_disposition_t sctp_sf_violation_chunklen(const struct sctp_endpoint *ep, +static sctp_disposition_t sctp_sf_violation_chunklen( + const struct sctp_endpoint *ep, const struct sctp_association *asoc, const sctp_subtype_t type, void *arg, @@ -3805,6 +3832,10 @@ sctp_disposition_t sctp_sf_do_prm_asoc(const struct sctp_endpoint *ep, sctp_add_cmd_sf(commands, SCTP_CMD_NEW_ASOC, SCTP_ASOC((struct sctp_association *) asoc)); + /* Choose transport for INIT. */ + sctp_add_cmd_sf(commands, SCTP_CMD_INIT_CHOOSE_TRANSPORT, + SCTP_CHUNK(repl)); + /* After sending the INIT, "A" starts the T1-init timer and * enters the COOKIE-WAIT state. */ @@ -4589,7 +4620,7 @@ sctp_disposition_t sctp_sf_do_6_2_sack(const struct sctp_endpoint *ep, } /* - * sctp_sf_t1_timer_expire + * sctp_sf_t1_init_timer_expire * * Section: 4 Note: 2 * Verification Tag: @@ -4603,7 +4634,59 @@ sctp_disposition_t sctp_sf_do_6_2_sack(const struct sctp_endpoint *ep, * endpoint MUST abort the initialization process and report the * error to SCTP user. * - * 3) If the T1-cookie timer expires, the endpoint MUST retransmit + * Outputs + * (timers, events) + * + */ +sctp_disposition_t sctp_sf_t1_init_timer_expire(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 *repl = NULL; + struct sctp_bind_addr *bp; + int attempts = asoc->init_err_counter + 1; + + SCTP_DEBUG_PRINTK("Timer T1 expired (INIT).\n"); + + if (attempts < asoc->max_init_attempts) { + bp = (struct sctp_bind_addr *) &asoc->base.bind_addr; + repl = sctp_make_init(asoc, bp, GFP_ATOMIC, 0); + if (!repl) + return SCTP_DISPOSITION_NOMEM; + + /* Choose transport for INIT. */ + sctp_add_cmd_sf(commands, SCTP_CMD_INIT_CHOOSE_TRANSPORT, + SCTP_CHUNK(repl)); + + /* Issue a sideeffect to do the needed accounting. */ + sctp_add_cmd_sf(commands, SCTP_CMD_INIT_RESTART, + SCTP_TO(SCTP_EVENT_TIMEOUT_T1_INIT)); + + sctp_add_cmd_sf(commands, SCTP_CMD_REPLY, SCTP_CHUNK(repl)); + } else { + SCTP_DEBUG_PRINTK("Giving up on INIT, attempts: %d" + " max_init_attempts: %d\n", + attempts, asoc->max_init_attempts); + sctp_add_cmd_sf(commands, SCTP_CMD_INIT_FAILED, + SCTP_U32(SCTP_ERROR_NO_ERROR)); + return SCTP_DISPOSITION_DELETE_TCB; + } + + return SCTP_DISPOSITION_CONSUME; +} + +/* + * sctp_sf_t1_cookie_timer_expire + * + * Section: 4 Note: 2 + * Verification Tag: + * Inputs + * (endpoint, asoc) + * + * RFC 2960 Section 4 Notes + * 3) If the T1-cookie timer expires, the endpoint MUST retransmit * COOKIE ECHO and re-start the T1-cookie timer without changing * state. This MUST be repeated up to 'Max.Init.Retransmits' times. * After that, the endpoint MUST abort the initialization process and @@ -4613,46 +4696,26 @@ sctp_disposition_t sctp_sf_do_6_2_sack(const struct sctp_endpoint *ep, * (timers, events) * */ -sctp_disposition_t sctp_sf_t1_timer_expire(const struct sctp_endpoint *ep, +sctp_disposition_t sctp_sf_t1_cookie_timer_expire(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 *repl; - struct sctp_bind_addr *bp; - sctp_event_timeout_t timer = (sctp_event_timeout_t) arg; - int timeout; - int attempts; + struct sctp_chunk *repl = NULL; + int attempts = asoc->init_err_counter + 1; - timeout = asoc->timeouts[timer]; - attempts = asoc->counters[SCTP_COUNTER_INIT_ERROR] + 1; - repl = NULL; - - SCTP_DEBUG_PRINTK("Timer T1 expired.\n"); + SCTP_DEBUG_PRINTK("Timer T1 expired (COOKIE-ECHO).\n"); if (attempts < asoc->max_init_attempts) { - switch (timer) { - case SCTP_EVENT_TIMEOUT_T1_INIT: - bp = (struct sctp_bind_addr *) &asoc->base.bind_addr; - repl = sctp_make_init(asoc, bp, GFP_ATOMIC, 0); - break; - - case SCTP_EVENT_TIMEOUT_T1_COOKIE: - repl = sctp_make_cookie_echo(asoc, NULL); - break; - - default: - BUG(); - break; - }; - + repl = sctp_make_cookie_echo(asoc, NULL); if (!repl) - goto nomem; + return SCTP_DISPOSITION_NOMEM; /* Issue a sideeffect to do the needed accounting. */ - sctp_add_cmd_sf(commands, SCTP_CMD_INIT_RESTART, - SCTP_TO(timer)); + sctp_add_cmd_sf(commands, SCTP_CMD_COOKIEECHO_RESTART, + SCTP_TO(SCTP_EVENT_TIMEOUT_T1_COOKIE)); + sctp_add_cmd_sf(commands, SCTP_CMD_REPLY, SCTP_CHUNK(repl)); } else { sctp_add_cmd_sf(commands, SCTP_CMD_INIT_FAILED, @@ -4661,9 +4724,6 @@ sctp_disposition_t sctp_sf_t1_timer_expire(const struct sctp_endpoint *ep, } return SCTP_DISPOSITION_CONSUME; - -nomem: - return SCTP_DISPOSITION_NOMEM; } /* RFC2960 9.2 If the timer expires, the endpoint must re-send the SHUTDOWN |
