diff options
Diffstat (limited to 'net/sctp/associola.c')
| -rw-r--r-- | net/sctp/associola.c | 83 |
1 files changed, 76 insertions, 7 deletions
diff --git a/net/sctp/associola.c b/net/sctp/associola.c index 013e3d3ab0f1..a016e78061f4 100644 --- a/net/sctp/associola.c +++ b/net/sctp/associola.c @@ -61,6 +61,7 @@ /* Forward declarations for internal functions. */ static void sctp_assoc_bh_rcv(struct work_struct *work); +static void sctp_assoc_free_asconf_acks(struct sctp_association *asoc); /* 1st Level Abstractions. */ @@ -167,11 +168,9 @@ static struct sctp_association *sctp_association_init(struct sctp_association *a sp->autoclose * HZ; /* Initilizes the timers */ - for (i = SCTP_EVENT_TIMEOUT_NONE; i < SCTP_NUM_TIMEOUT_TYPES; ++i) { - init_timer(&asoc->timers[i]); - asoc->timers[i].function = sctp_timer_events[i]; - asoc->timers[i].data = (unsigned long) asoc; - } + for (i = SCTP_EVENT_TIMEOUT_NONE; i < SCTP_NUM_TIMEOUT_TYPES; ++i) + setup_timer(&asoc->timers[i], sctp_timer_events[i], + (unsigned long)asoc); /* Pull default initialization values from the sock options. * Note: This assumes that the values have already been @@ -244,6 +243,7 @@ static struct sctp_association *sctp_association_init(struct sctp_association *a asoc->addip_serial = asoc->c.initial_tsn; INIT_LIST_HEAD(&asoc->addip_chunk_list); + INIT_LIST_HEAD(&asoc->asconf_ack_list); /* Make an empty list of remote transport addresses. */ INIT_LIST_HEAD(&asoc->peer.transport_addr_list); @@ -433,8 +433,7 @@ void sctp_association_free(struct sctp_association *asoc) asoc->peer.transport_count = 0; /* Free any cached ASCONF_ACK chunk. */ - if (asoc->addip_last_asconf_ack) - sctp_chunk_free(asoc->addip_last_asconf_ack); + sctp_assoc_free_asconf_acks(asoc); /* Free any cached ASCONF chunk. */ if (asoc->addip_last_asconf) @@ -732,6 +731,23 @@ struct sctp_transport *sctp_assoc_lookup_paddr( return NULL; } +/* Remove all transports except a give one */ +void sctp_assoc_del_nonprimary_peers(struct sctp_association *asoc, + struct sctp_transport *primary) +{ + struct sctp_transport *temp; + struct sctp_transport *t; + + list_for_each_entry_safe(t, temp, &asoc->peer.transport_addr_list, + transports) { + /* if the current transport is not the primary one, delete it */ + if (t != primary) + sctp_assoc_rm_peer(asoc, t); + } + + return; +} + /* Engage in transport control operations. * Mark the transport up or down and send a notification to the user. * Select and update the new active and retran paths. @@ -1470,3 +1486,56 @@ retry: asoc->assoc_id = (sctp_assoc_t) assoc_id; return error; } + +/* Free asconf_ack cache */ +static void sctp_assoc_free_asconf_acks(struct sctp_association *asoc) +{ + struct sctp_chunk *ack; + struct sctp_chunk *tmp; + + list_for_each_entry_safe(ack, tmp, &asoc->asconf_ack_list, + transmitted_list) { + list_del_init(&ack->transmitted_list); + sctp_chunk_free(ack); + } +} + +/* Clean up the ASCONF_ACK queue */ +void sctp_assoc_clean_asconf_ack_cache(const struct sctp_association *asoc) +{ + struct sctp_chunk *ack; + struct sctp_chunk *tmp; + + /* We can remove all the entries from the queue upto + * the "Peer-Sequence-Number". + */ + list_for_each_entry_safe(ack, tmp, &asoc->asconf_ack_list, + transmitted_list) { + if (ack->subh.addip_hdr->serial == + htonl(asoc->peer.addip_serial)) + break; + + list_del_init(&ack->transmitted_list); + sctp_chunk_free(ack); + } +} + +/* Find the ASCONF_ACK whose serial number matches ASCONF */ +struct sctp_chunk *sctp_assoc_lookup_asconf_ack( + const struct sctp_association *asoc, + __be32 serial) +{ + struct sctp_chunk *ack = NULL; + + /* Walk through the list of cached ASCONF-ACKs and find the + * ack chunk whose serial number matches that of the request. + */ + list_for_each_entry(ack, &asoc->asconf_ack_list, transmitted_list) { + if (ack->subh.addip_hdr->serial == serial) { + sctp_chunk_hold(ack); + break; + } + } + + return ack; +} |