diff options
| -rw-r--r-- | include/net/ip_vs.h | 21 | ||||
| -rw-r--r-- | net/netfilter/ipvs/ip_vs_proto_sctp.c | 854 | ||||
| -rw-r--r-- | net/netfilter/ipvs/ip_vs_sync.c | 7 |
3 files changed, 168 insertions, 714 deletions
diff --git a/include/net/ip_vs.h b/include/net/ip_vs.h index 95860df..e667df1 100644 --- a/include/net/ip_vs.h +++ b/include/net/ip_vs.h @@ -380,17 +380,18 @@ enum { */ enum ip_vs_sctp_states { IP_VS_SCTP_S_NONE, - IP_VS_SCTP_S_INIT_CLI, - IP_VS_SCTP_S_INIT_SER, - IP_VS_SCTP_S_INIT_ACK_CLI, - IP_VS_SCTP_S_INIT_ACK_SER, - IP_VS_SCTP_S_ECHO_CLI, - IP_VS_SCTP_S_ECHO_SER, + IP_VS_SCTP_S_INIT1, + IP_VS_SCTP_S_INIT, + IP_VS_SCTP_S_COOKIE_SENT, + IP_VS_SCTP_S_COOKIE_REPLIED, + IP_VS_SCTP_S_COOKIE_WAIT, + IP_VS_SCTP_S_COOKIE, + IP_VS_SCTP_S_COOKIE_ECHOED, IP_VS_SCTP_S_ESTABLISHED, - IP_VS_SCTP_S_SHUT_CLI, - IP_VS_SCTP_S_SHUT_SER, - IP_VS_SCTP_S_SHUT_ACK_CLI, - IP_VS_SCTP_S_SHUT_ACK_SER, + IP_VS_SCTP_S_SHUTDOWN_SENT, + IP_VS_SCTP_S_SHUTDOWN_RECEIVED, + IP_VS_SCTP_S_SHUTDOWN_ACK_SENT, + IP_VS_SCTP_S_REJECTED, IP_VS_SCTP_S_CLOSED, IP_VS_SCTP_S_LAST }; diff --git a/net/netfilter/ipvs/ip_vs_proto_sctp.c b/net/netfilter/ipvs/ip_vs_proto_sctp.c index df29d64..3c0da87 100644 --- a/net/netfilter/ipvs/ip_vs_proto_sctp.c +++ b/net/netfilter/ipvs/ip_vs_proto_sctp.c @@ -185,710 +185,159 @@ sctp_csum_check(int af, struct sk_buff *skb, struct ip_vs_protocol *pp) return 1; } -struct ipvs_sctp_nextstate { - int next_state; -}; enum ipvs_sctp_event_t { - IP_VS_SCTP_EVE_DATA_CLI, - IP_VS_SCTP_EVE_DATA_SER, - IP_VS_SCTP_EVE_INIT_CLI, - IP_VS_SCTP_EVE_INIT_SER, - IP_VS_SCTP_EVE_INIT_ACK_CLI, - IP_VS_SCTP_EVE_INIT_ACK_SER, - IP_VS_SCTP_EVE_COOKIE_ECHO_CLI, - IP_VS_SCTP_EVE_COOKIE_ECHO_SER, - IP_VS_SCTP_EVE_COOKIE_ACK_CLI, - IP_VS_SCTP_EVE_COOKIE_ACK_SER, - IP_VS_SCTP_EVE_ABORT_CLI, - IP_VS_SCTP_EVE__ABORT_SER, - IP_VS_SCTP_EVE_SHUT_CLI, - IP_VS_SCTP_EVE_SHUT_SER, - IP_VS_SCTP_EVE_SHUT_ACK_CLI, - IP_VS_SCTP_EVE_SHUT_ACK_SER, - IP_VS_SCTP_EVE_SHUT_COM_CLI, - IP_VS_SCTP_EVE_SHUT_COM_SER, - IP_VS_SCTP_EVE_LAST + IP_VS_SCTP_DATA = 0, /* DATA, SACK, HEARTBEATs */ + IP_VS_SCTP_INIT, + IP_VS_SCTP_INIT_ACK, + IP_VS_SCTP_COOKIE_ECHO, + IP_VS_SCTP_COOKIE_ACK, + IP_VS_SCTP_SHUTDOWN, + IP_VS_SCTP_SHUTDOWN_ACK, + IP_VS_SCTP_SHUTDOWN_COMPLETE, + IP_VS_SCTP_ERROR, + IP_VS_SCTP_ABORT, + IP_VS_SCTP_EVENT_LAST }; -static enum ipvs_sctp_event_t sctp_events[256] = { - IP_VS_SCTP_EVE_DATA_CLI, - IP_VS_SCTP_EVE_INIT_CLI, - IP_VS_SCTP_EVE_INIT_ACK_CLI, - IP_VS_SCTP_EVE_DATA_CLI, - IP_VS_SCTP_EVE_DATA_CLI, - IP_VS_SCTP_EVE_DATA_CLI, - IP_VS_SCTP_EVE_ABORT_CLI, - IP_VS_SCTP_EVE_SHUT_CLI, - IP_VS_SCTP_EVE_SHUT_ACK_CLI, - IP_VS_SCTP_EVE_DATA_CLI, - IP_VS_SCTP_EVE_COOKIE_ECHO_CLI, - IP_VS_SCTP_EVE_COOKIE_ACK_CLI, - IP_VS_SCTP_EVE_DATA_CLI, - IP_VS_SCTP_EVE_DATA_CLI, - IP_VS_SCTP_EVE_SHUT_COM_CLI, +/* RFC 2960, 3.2 Chunk Field Descriptions */ +static __u8 sctp_events[] = { + [SCTP_CID_DATA] = IP_VS_SCTP_DATA, + [SCTP_CID_INIT] = IP_VS_SCTP_INIT, + [SCTP_CID_INIT_ACK] = IP_VS_SCTP_INIT_ACK, + [SCTP_CID_SACK] = IP_VS_SCTP_DATA, + [SCTP_CID_HEARTBEAT] = IP_VS_SCTP_DATA, + [SCTP_CID_HEARTBEAT_ACK] = IP_VS_SCTP_DATA, + [SCTP_CID_ABORT] = IP_VS_SCTP_ABORT, + [SCTP_CID_SHUTDOWN] = IP_VS_SCTP_SHUTDOWN, + [SCTP_CID_SHUTDOWN_ACK] = IP_VS_SCTP_SHUTDOWN_ACK, + [SCTP_CID_ERROR] = IP_VS_SCTP_ERROR, + [SCTP_CID_COOKIE_ECHO] = IP_VS_SCTP_COOKIE_ECHO, + [SCTP_CID_COOKIE_ACK] = IP_VS_SCTP_COOKIE_ACK, + [SCTP_CID_ECN_ECNE] = IP_VS_SCTP_DATA, + [SCTP_CID_ECN_CWR] = IP_VS_SCTP_DATA, + [SCTP_CID_SHUTDOWN_COMPLETE] = IP_VS_SCTP_SHUTDOWN_COMPLETE, }; -static struct ipvs_sctp_nextstate - sctp_states_table[IP_VS_SCTP_S_LAST][IP_VS_SCTP_EVE_LAST] = { - /* - * STATE : IP_VS_SCTP_S_NONE - */ - /*next state *//*event */ - {{IP_VS_SCTP_S_ESTABLISHED /* IP_VS_SCTP_EVE_DATA_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_DATA_SER */ }, - {IP_VS_SCTP_S_INIT_CLI /* IP_VS_SCTP_EVE_INIT_CLI */ }, - {IP_VS_SCTP_S_INIT_SER /* IP_VS_SCTP_EVE_INIT_SER */ }, - {IP_VS_SCTP_S_INIT_ACK_CLI /* IP_VS_SCTP_EVE_INIT_ACK_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_INIT_ACK_SER */ }, - {IP_VS_SCTP_S_ECHO_CLI /* IP_VS_SCTP_EVE_COOKIE_ECHO_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_COOKIE_ECHO_SER */ }, - {IP_VS_SCTP_S_ESTABLISHED /* IP_VS_SCTP_EVE_COOKIE_ACK_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_COOKIE_ACK_SER */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_SER */ }, - {IP_VS_SCTP_S_SHUT_CLI /* IP_VS_SCTP_EVE_SHUT_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_SER */ }, - {IP_VS_SCTP_S_SHUT_ACK_CLI /* IP_VS_SCTP_EVE_SHUT_ACK_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_ACK_SER */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_SER */ }, - }, - /* - * STATE : IP_VS_SCTP_S_INIT_CLI - * Cient sent INIT and is waiting for reply from server(In ECHO_WAIT) - */ - {{IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_DATA_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_DATA_SER */ }, - {IP_VS_SCTP_S_INIT_CLI /* IP_VS_SCTP_EVE_INIT_CLI */ }, - {IP_VS_SCTP_S_INIT_SER /* IP_VS_SCTP_EVE_INIT_SER */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_INIT_ACK_CLI */ }, - {IP_VS_SCTP_S_INIT_ACK_SER /* IP_VS_SCTP_EVE_INIT_ACK_SER */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ECHO_CLI */ }, - {IP_VS_SCTP_S_INIT_CLI /* IP_VS_SCTP_EVE_ECHO_SER */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_COOKIE_ACK_CLI */ }, - {IP_VS_SCTP_S_INIT_CLI /* IP_VS_SCTP_EVE_COOKIE_ACK_SER */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_SER */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_SER */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_ACK_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_ACK_SER */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_SER */ } - }, - /* - * State : IP_VS_SCTP_S_INIT_SER - * Server sent INIT and waiting for INIT ACK from the client - */ - {{IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_DATA_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_DATA_SER */ }, - {IP_VS_SCTP_S_INIT_CLI /* IP_VS_SCTP_EVE_INIT_CLI */ }, - {IP_VS_SCTP_S_INIT_SER /* IP_VS_SCTP_EVE_INIT_SER */ }, - {IP_VS_SCTP_S_INIT_ACK_CLI /* IP_VS_SCTP_EVE_INIT_ACK_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_INIT_ACK_SER */ }, - {IP_VS_SCTP_S_INIT_SER /* IP_VS_SCTP_EVE_COOKIE_ECHO_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_COOKIE_ECHO_SER */ }, - {IP_VS_SCTP_S_INIT_SER /* IP_VS_SCTP_EVE_COOKIE_ACK_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_COOKIE_ACK_SER */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_SER */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_SER */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_ACK_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_ACK_SER */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_SER */ } - }, - /* - * State : IP_VS_SCTP_S_INIT_ACK_CLI - * Client sent INIT ACK and waiting for ECHO from the server - */ - {{IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_DATA_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_DATA_SER */ }, - /* - * We have got an INIT from client. From the spec.“Upon receipt of - * an INIT in the COOKIE-WAIT state, an endpoint MUST respond with - * an INIT ACK using the same parameters it sent in its original - * INIT chunk (including its Initiate Tag, unchanged”). - */ - {IP_VS_SCTP_S_INIT_CLI /* IP_VS_SCTP_EVE_INIT_CLI */ }, - {IP_VS_SCTP_S_INIT_SER /* IP_VS_SCTP_EVE_INIT_SER */ }, - /* - * INIT_ACK has been resent by the client, let us stay is in - * the same state - */ - {IP_VS_SCTP_S_INIT_ACK_CLI /* IP_VS_SCTP_EVE_INIT_ACK_CLI */ }, - /* - * INIT_ACK sent by the server, close the connection - */ - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_INIT_ACK_SER */ }, - /* - * ECHO by client, it should not happen, close the connection - */ - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_COOKIE_ECHO_CLI */ }, - /* - * ECHO by server, this is what we are expecting, move to ECHO_SER - */ - {IP_VS_SCTP_S_ECHO_SER /* IP_VS_SCTP_EVE_COOKIE_ECHO_SER */ }, - /* - * COOKIE ACK from client, it should not happen, close the connection - */ - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_COOKIE_ACK_CLI */ }, - /* - * Unexpected COOKIE ACK from server, staty in the same state - */ - {IP_VS_SCTP_S_INIT_ACK_CLI /* IP_VS_SCTP_EVE_COOKIE_ACK_SER */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_SER */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_SER */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_ACK_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_ACK_SER */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_SER */ } - }, - /* - * State : IP_VS_SCTP_S_INIT_ACK_SER - * Server sent INIT ACK and waiting for ECHO from the client - */ - {{IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_DATA_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_DATA_SER */ }, - /* - * We have got an INIT from client. From the spec.“Upon receipt of - * an INIT in the COOKIE-WAIT state, an endpoint MUST respond with - * an INIT ACK using the same parameters it sent in its original - * INIT chunk (including its Initiate Tag, unchanged”). - */ - {IP_VS_SCTP_S_INIT_CLI /* IP_VS_SCTP_EVE_INIT_CLI */ }, - {IP_VS_SCTP_S_INIT_SER /* IP_VS_SCTP_EVE_INIT_SER */ }, - /* - * Unexpected INIT_ACK by the client, let us close the connection - */ - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_INIT_ACK_CLI */ }, - /* - * INIT_ACK resent by the server, let us move to same state - */ - {IP_VS_SCTP_S_INIT_ACK_SER /* IP_VS_SCTP_EVE_INIT_ACK_SER */ }, - /* - * Client send the ECHO, this is what we are expecting, - * move to ECHO_CLI - */ - {IP_VS_SCTP_S_ECHO_CLI /* IP_VS_SCTP_EVE_COOKIE_ECHO_CLI */ }, - /* - * ECHO received from the server, Not sure what to do, - * let us close it - */ - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_COOKIE_ECHO_SER */ }, - /* - * COOKIE ACK from client, let us stay in the same state - */ - {IP_VS_SCTP_S_INIT_ACK_SER /* IP_VS_SCTP_EVE_COOKIE_ACK_CLI */ }, - /* - * COOKIE ACK from server, hmm... this should not happen, lets close - * the connection. - */ - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_COOKIE_ACK_SER */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_SER */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_SER */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_ACK_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_ACK_SER */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_SER */ } - }, - /* - * State : IP_VS_SCTP_S_ECHO_CLI - * Cient sent ECHO and waiting COOKEI ACK from the Server - */ - {{IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_DATA_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_DATA_SER */ }, - /* - * We have got an INIT from client. From the spec.“Upon receipt of - * an INIT in the COOKIE-WAIT state, an endpoint MUST respond with - * an INIT ACK using the same parameters it sent in its original - * INIT chunk (including its Initiate Tag, unchanged”). - */ - {IP_VS_SCTP_S_INIT_CLI /* IP_VS_SCTP_EVE_INIT_CLI */ }, - {IP_VS_SCTP_S_INIT_SER /* IP_VS_SCTP_EVE_INIT_SER */ }, - /* - * INIT_ACK has been by the client, let us close the connection - */ - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_INIT_ACK_CLI */ }, - /* - * INIT_ACK sent by the server, Unexpected INIT ACK, spec says, - * “If an INIT ACK is received by an endpoint in any state other - * than the COOKIE-WAIT state, the endpoint should discard the - * INIT ACK chunk”. Stay in the same state - */ - {IP_VS_SCTP_S_ECHO_CLI /* IP_VS_SCTP_EVE_INIT_ACK_SER */ }, - /* - * Client resent the ECHO, let us stay in the same state - */ - {IP_VS_SCTP_S_ECHO_CLI /* IP_VS_SCTP_EVE_COOKIE_ECHO_CLI */ }, - /* - * ECHO received from the server, Not sure what to do, - * let us close it - */ - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_COOKIE_ECHO_SER */ }, - /* - * COOKIE ACK from client, this shoud not happen, let's close the - * connection - */ - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_COOKIE_ACK_CLI */ }, - /* - * COOKIE ACK from server, this is what we are awaiting,lets move to - * ESTABLISHED. - */ - {IP_VS_SCTP_S_ESTABLISHED /* IP_VS_SCTP_EVE_COOKIE_ACK_SER */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_SER */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_SER */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_ACK_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_ACK_SER */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_SER */ } - }, - /* - * State : IP_VS_SCTP_S_ECHO_SER - * Server sent ECHO and waiting COOKEI ACK from the client - */ - {{IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_DATA_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_DATA_SER */ }, - /* - * We have got an INIT from client. From the spec.“Upon receipt of - * an INIT in the COOKIE-WAIT state, an endpoint MUST respond with - * an INIT ACK using the same parameters it sent in its original - * INIT chunk (including its Initiate Tag, unchanged”). - */ - {IP_VS_SCTP_S_INIT_CLI /* IP_VS_SCTP_EVE_INIT_CLI */ }, - {IP_VS_SCTP_S_INIT_SER /* IP_VS_SCTP_EVE_INIT_SER */ }, - /* - * INIT_ACK sent by the server, Unexpected INIT ACK, spec says, - * “If an INIT ACK is received by an endpoint in any state other - * than the COOKIE-WAIT state, the endpoint should discard the - * INIT ACK chunk”. Stay in the same state - */ - {IP_VS_SCTP_S_ECHO_SER /* IP_VS_SCTP_EVE_INIT_ACK_CLI */ }, - /* - * INIT_ACK has been by the server, let us close the connection - */ - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_INIT_ACK_SER */ }, - /* - * Client sent the ECHO, not sure what to do, let's close the - * connection. - */ - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_COOKIE_ECHO_CLI */ }, - /* - * ECHO resent by the server, stay in the same state - */ - {IP_VS_SCTP_S_ECHO_SER /* IP_VS_SCTP_EVE_COOKIE_ECHO_SER */ }, - /* - * COOKIE ACK from client, this is what we are expecting, let's move - * to ESTABLISHED. - */ - {IP_VS_SCTP_S_ESTABLISHED /* IP_VS_SCTP_EVE_COOKIE_ACK_CLI */ }, - /* - * COOKIE ACK from server, this should not happen, lets close the - * connection. - */ - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_COOKIE_ACK_SER */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_SER */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_SER */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_ACK_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_ACK_SER */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_SER */ } - }, - /* - * State : IP_VS_SCTP_S_ESTABLISHED - * Association established - */ - {{IP_VS_SCTP_S_ESTABLISHED /* IP_VS_SCTP_EVE_DATA_CLI */ }, - {IP_VS_SCTP_S_ESTABLISHED /* IP_VS_SCTP_EVE_DATA_SER */ }, - /* - * We have got an INIT from client. From the spec.“Upon receipt of - * an INIT in the COOKIE-WAIT state, an endpoint MUST respond with - * an INIT ACK using the same parameters it sent in its original - * INIT chunk (including its Initiate Tag, unchanged”). - */ - {IP_VS_SCTP_S_INIT_CLI /* IP_VS_SCTP_EVE_INIT_CLI */ }, - {IP_VS_SCTP_S_INIT_SER /* IP_VS_SCTP_EVE_INIT_SER */ }, - /* - * INIT_ACK sent by the server, Unexpected INIT ACK, spec says, - * “If an INIT ACK is received by an endpoint in any state other - * than the COOKIE-WAIT state, the endpoint should discard the - * INIT ACK chunk”. Stay in the same state - */ - {IP_VS_SCTP_S_ESTABLISHED /* IP_VS_SCTP_EVE_INIT_ACK_CLI */ }, - {IP_VS_SCTP_S_ESTABLISHED /* IP_VS_SCTP_EVE_INIT_ACK_SER */ }, - /* - * Client sent ECHO, Spec(sec 5.2.4) says it may be handled by the - * peer and peer shall move to the ESTABISHED. if it doesn't handle - * it will send ERROR chunk. So, stay in the same state - */ - {IP_VS_SCTP_S_ESTABLISHED /* IP_VS_SCTP_EVE_COOKIE_ECHO_CLI */ }, - {IP_VS_SCTP_S_ESTABLISHED /* IP_VS_SCTP_EVE_COOKIE_ECHO_SER */ }, - /* - * COOKIE ACK from client, not sure what to do stay in the same state - */ - {IP_VS_SCTP_S_ESTABLISHED /* IP_VS_SCTP_EVE_COOKIE_ACK_CLI */ }, - {IP_VS_SCTP_S_ESTABLISHED /* IP_VS_SCTP_EVE_COOKIE_ACK_SER */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_SER */ }, - /* - * SHUTDOWN from the client, move to SHUDDOWN_CLI - */ - {IP_VS_SCTP_S_SHUT_CLI /* IP_VS_SCTP_EVE_SHUT_CLI */ }, - /* - * SHUTDOWN from the server, move to SHUTDOWN_SER - */ - {IP_VS_SCTP_S_SHUT_SER /* IP_VS_SCTP_EVE_SHUT_SER */ }, - /* - * client sent SHUDTDOWN_ACK, this should not happen, let's close - * the connection - */ - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_ACK_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_ACK_SER */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_SER */ } - }, - /* - * State : IP_VS_SCTP_S_SHUT_CLI - * SHUTDOWN sent from the client, waitinf for SHUT ACK from the server - */ - /* - * We received the data chuck, keep the state unchanged. I assume - * that still data chuncks can be received by both the peers in - * SHUDOWN state - */ - - {{IP_VS_SCTP_S_SHUT_CLI /* IP_VS_SCTP_EVE_DATA_CLI */ }, - {IP_VS_SCTP_S_SHUT_CLI /* IP_VS_SCTP_EVE_DATA_SER */ }, - /* - * We have got an INIT from client. From the spec.“Upon receipt of - * an INIT in the COOKIE-WAIT state, an endpoint MUST respond with - * an INIT ACK using the same parameters it sent in its original - * INIT chunk (including its Initiate Tag, unchanged”). - */ - {IP_VS_SCTP_S_INIT_CLI /* IP_VS_SCTP_EVE_INIT_CLI */ }, - {IP_VS_SCTP_S_INIT_SER /* IP_VS_SCTP_EVE_INIT_SER */ }, - /* - * INIT_ACK sent by the server, Unexpected INIT ACK, spec says, - * “If an INIT ACK is received by an endpoint in any state other - * than the COOKIE-WAIT state, the endpoint should discard the - * INIT ACK chunk”. Stay in the same state - */ - {IP_VS_SCTP_S_SHUT_CLI /* IP_VS_SCTP_EVE_INIT_ACK_CLI */ }, - {IP_VS_SCTP_S_SHUT_CLI /* IP_VS_SCTP_EVE_INIT_ACK_SER */ }, - /* - * Client sent ECHO, Spec(sec 5.2.4) says it may be handled by the - * peer and peer shall move to the ESTABISHED. if it doesn't handle - * it will send ERROR chunk. So, stay in the same state - */ - {IP_VS_SCTP_S_ESTABLISHED /* IP_VS_SCTP_EVE_COOKIE_ECHO_CLI */ }, - {IP_VS_SCTP_S_ESTABLISHED /* IP_VS_SCTP_EVE_COOKIE_ECHO_SER */ }, - /* - * COOKIE ACK from client, not sure what to do stay in the same state - */ - {IP_VS_SCTP_S_SHUT_CLI /* IP_VS_SCTP_EVE_COOKIE_ACK_CLI */ }, - {IP_VS_SCTP_S_SHUT_CLI /* IP_VS_SCTP_EVE_COOKIE_ACK_SER */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_SER */ }, - /* - * SHUTDOWN resent from the client, move to SHUDDOWN_CLI - */ - {IP_VS_SCTP_S_SHUT_CLI /* IP_VS_SCTP_EVE_SHUT_CLI */ }, - /* - * SHUTDOWN from the server, move to SHUTDOWN_SER - */ - {IP_VS_SCTP_S_SHUT_SER /* IP_VS_SCTP_EVE_SHUT_SER */ }, - /* - * client sent SHUDTDOWN_ACK, this should not happen, let's close - * the connection - */ - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_ACK_CLI */ }, - /* - * Server sent SHUTDOWN ACK, this is what we are expecting, let's move - * to SHUDOWN_ACK_SER - */ - {IP_VS_SCTP_S_SHUT_ACK_SER /* IP_VS_SCTP_EVE_SHUT_ACK_SER */ }, - /* - * SHUTDOWN COM from client, this should not happen, let's close the - * connection - */ - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_SER */ } - }, - /* - * State : IP_VS_SCTP_S_SHUT_SER - * SHUTDOWN sent from the server, waitinf for SHUTDOWN ACK from client - */ - /* - * We received the data chuck, keep the state unchanged. I assume - * that still data chuncks can be received by both the peers in - * SHUDOWN state - */ - - {{IP_VS_SCTP_S_SHUT_SER /* IP_VS_SCTP_EVE_DATA_CLI */ }, - {IP_VS_SCTP_S_SHUT_SER /* IP_VS_SCTP_EVE_DATA_SER */ }, - /* - * We have got an INIT from client. From the spec.“Upon receipt of - * an INIT in the COOKIE-WAIT state, an endpoint MUST respond with - * an INIT ACK using the same parameters it sent in its original - * INIT chunk (including its Initiate Tag, unchanged”). - */ - {IP_VS_SCTP_S_INIT_CLI /* IP_VS_SCTP_EVE_INIT_CLI */ }, - {IP_VS_SCTP_S_INIT_SER /* IP_VS_SCTP_EVE_INIT_SER */ }, - /* - * INIT_ACK sent by the server, Unexpected INIT ACK, spec says, - * “If an INIT ACK is received by an endpoint in any state other - * than the COOKIE-WAIT state, the endpoint should discard the - * INIT ACK chunk”. Stay in the same state - */ - {IP_VS_SCTP_S_SHUT_SER /* IP_VS_SCTP_EVE_INIT_ACK_CLI */ }, - {IP_VS_SCTP_S_SHUT_SER /* IP_VS_SCTP_EVE_INIT_ACK_SER */ }, - /* - * Client sent ECHO, Spec(sec 5.2.4) says it may be handled by the - * peer and peer shall move to the ESTABISHED. if it doesn't handle - * it will send ERROR chunk. So, stay in the same state - */ - {IP_VS_SCTP_S_ESTABLISHED /* IP_VS_SCTP_EVE_COOKIE_ECHO_CLI */ }, - {IP_VS_SCTP_S_ESTABLISHED /* IP_VS_SCTP_EVE_COOKIE_ECHO_SER */ }, - /* - * COOKIE ACK from client, not sure what to do stay in the same state - */ - {IP_VS_SCTP_S_SHUT_SER /* IP_VS_SCTP_EVE_COOKIE_ACK_CLI */ }, - {IP_VS_SCTP_S_SHUT_SER /* IP_VS_SCTP_EVE_COOKIE_ACK_SER */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_SER */ }, - /* - * SHUTDOWN resent from the client, move to SHUDDOWN_CLI - */ - {IP_VS_SCTP_S_SHUT_CLI /* IP_VS_SCTP_EVE_SHUT_CLI */ }, - /* - * SHUTDOWN resent from the server, move to SHUTDOWN_SER - */ - {IP_VS_SCTP_S_SHUT_SER /* IP_VS_SCTP_EVE_SHUT_SER */ }, - /* - * client sent SHUDTDOWN_ACK, this is what we are expecting, let's - * move to SHUT_ACK_CLI - */ - {IP_VS_SCTP_S_SHUT_ACK_CLI /* IP_VS_SCTP_EVE_SHUT_ACK_CLI */ }, - /* - * Server sent SHUTDOWN ACK, this should not happen, let's close the - * connection - */ - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_ACK_SER */ }, - /* - * SHUTDOWN COM from client, this should not happen, let's close the - * connection - */ - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_SER */ } - }, - - /* - * State : IP_VS_SCTP_S_SHUT_ACK_CLI - * SHUTDOWN ACK from the client, awaiting for SHUTDOWN COM from server - */ - /* - * We received the data chuck, keep the state unchanged. I assume - * that still data chuncks can be received by both the peers in - * SHUDOWN state - */ - - {{IP_VS_SCTP_S_SHUT_ACK_CLI /* IP_VS_SCTP_EVE_DATA_CLI */ }, - {IP_VS_SCTP_S_SHUT_ACK_CLI /* IP_VS_SCTP_EVE_DATA_SER */ }, - /* - * We have got an INIT from client. From the spec.“Upon receipt of - * an INIT in the COOKIE-WAIT state, an endpoint MUST respond with - * an INIT ACK using the same parameters it sent in its original - * INIT chunk (including its Initiate Tag, unchanged”). - */ - {IP_VS_SCTP_S_INIT_CLI /* IP_VS_SCTP_EVE_INIT_CLI */ }, - {IP_VS_SCTP_S_INIT_SER /* IP_VS_SCTP_EVE_INIT_SER */ }, - /* - * INIT_ACK sent by the server, Unexpected INIT ACK, spec says, - * “If an INIT ACK is received by an endpoint in any state other - * than the COOKIE-WAIT state, the endpoint should discard the - * INIT ACK chunk”. Stay in the same state - */ - {IP_VS_SCTP_S_SHUT_ACK_CLI /* IP_VS_SCTP_EVE_INIT_ACK_CLI */ }, - {IP_VS_SCTP_S_SHUT_ACK_CLI /* IP_VS_SCTP_EVE_INIT_ACK_SER */ }, - /* - * Client sent ECHO, Spec(sec 5.2.4) says it may be handled by the - * peer and peer shall move to the ESTABISHED. if it doesn't handle - * it will send ERROR chunk. So, stay in the same state - */ - {IP_VS_SCTP_S_ESTABLISHED /* IP_VS_SCTP_EVE_COOKIE_ECHO_CLI */ }, - {IP_VS_SCTP_S_ESTABLISHED /* IP_VS_SCTP_EVE_COOKIE_ECHO_SER */ }, - /* - * COOKIE ACK from client, not sure what to do stay in the same state - */ - {IP_VS_SCTP_S_SHUT_ACK_CLI /* IP_VS_SCTP_EVE_COOKIE_ACK_CLI */ }, - {IP_VS_SCTP_S_SHUT_ACK_CLI /* IP_VS_SCTP_EVE_COOKIE_ACK_SER */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_SER */ }, - /* - * SHUTDOWN sent from the client, move to SHUDDOWN_CLI - */ - {IP_VS_SCTP_S_SHUT_CLI /* IP_VS_SCTP_EVE_SHUT_CLI */ }, - /* - * SHUTDOWN sent from the server, move to SHUTDOWN_SER - */ - {IP_VS_SCTP_S_SHUT_SER /* IP_VS_SCTP_EVE_SHUT_SER */ }, - /* - * client resent SHUDTDOWN_ACK, let's stay in the same state - */ - {IP_VS_SCTP_S_SHUT_ACK_CLI /* IP_VS_SCTP_EVE_SHUT_ACK_CLI */ }, - /* - * Server sent SHUTDOWN ACK, this should not happen, let's close the - * connection - */ - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_ACK_SER */ }, - /* - * SHUTDOWN COM from client, this should not happen, let's close the - * connection - */ - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_CLI */ }, - /* - * SHUTDOWN COMPLETE from server this is what we are expecting. - */ - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_SER */ } - }, - - /* - * State : IP_VS_SCTP_S_SHUT_ACK_SER - * SHUTDOWN ACK from the server, awaiting for SHUTDOWN COM from client - */ - /* - * We received the data chuck, keep the state unchanged. I assume - * that still data chuncks can be received by both the peers in - * SHUDOWN state - */ +/* SCTP States: + * See RFC 2960, 4. SCTP Association State Diagram + * + * New states (not in diagram): + * - INIT1 state: use shorter timeout for dropped INIT packets + * - REJECTED state: use shorter timeout if INIT is rejected with ABORT + * - INIT, COOKIE_SENT, COOKIE_REPLIED, COOKIE states: for better debugging + * + * The states are as seen in real server. In the diagram, INIT1, INIT, + * COOKIE_SENT and COOKIE_REPLIED processing happens in CLOSED state. + * + * States as per packets from client (C) and server (S): + * + * Setup of client connection: + * IP_VS_SCTP_S_INIT1: First C:INIT sent, wait for S:INIT-ACK + * IP_VS_SCTP_S_INIT: Next C:INIT sent, wait for S:INIT-ACK + * IP_VS_SCTP_S_COOKIE_SENT: S:INIT-ACK sent, wait for C:COOKIE-ECHO + * IP_VS_SCTP_S_COOKIE_REPLIED: C:COOKIE-ECHO sent, wait for S:COOKIE-ACK + * + * Setup of server connection: + * IP_VS_SCTP_S_COOKIE_WAIT: S:INIT sent, wait for C:INIT-ACK + * IP_VS_SCTP_S_COOKIE: C:INIT-ACK sent, wait for S:COOKIE-ECHO + * IP_VS_SCTP_S_COOKIE_ECHOED: S:COOKIE-ECHO sent, wait for C:COOKIE-ACK + */ - {{IP_VS_SCTP_S_SHUT_ACK_SER /* IP_VS_SCTP_EVE_DATA_CLI */ }, - {IP_VS_SCTP_S_SHUT_ACK_SER /* IP_VS_SCTP_EVE_DATA_SER */ }, - /* - * We have got an INIT from client. From the spec.“Upon receipt of - * an INIT in the COOKIE-WAIT state, an endpoint MUST respond with - * an INIT ACK using the same parameters it sent in its original - * INIT chunk (including its Initiate Tag, unchanged”). - */ - {IP_VS_SCTP_S_INIT_CLI /* IP_VS_SCTP_EVE_INIT_CLI */ }, - {IP_VS_SCTP_S_INIT_SER /* IP_VS_SCTP_EVE_INIT_SER */ }, - /* - * INIT_ACK sent by the server, Unexpected INIT ACK, spec says, - * “If an INIT ACK is received by an endpoint in any state other - * than the COOKIE-WAIT state, the endpoint should discard the - * INIT ACK chunk”. Stay in the same state - */ - {IP_VS_SCTP_S_SHUT_ACK_SER /* IP_VS_SCTP_EVE_INIT_ACK_CLI */ }, - {IP_VS_SCTP_S_SHUT_ACK_SER /* IP_VS_SCTP_EVE_INIT_ACK_SER */ }, - /* - * Client sent ECHO, Spec(sec 5.2.4) says it may be handled by the - * peer and peer shall move to the ESTABISHED. if it doesn't handle - * it will send ERROR chunk. So, stay in the same state - */ - {IP_VS_SCTP_S_ESTABLISHED /* IP_VS_SCTP_EVE_COOKIE_ECHO_CLI */ }, - {IP_VS_SCTP_S_ESTABLISHED /* IP_VS_SCTP_EVE_COOKIE_ECHO_SER */ }, - /* - * COOKIE ACK from client, not sure what to do stay in the same state - */ - {IP_VS_SCTP_S_SHUT_ACK_SER /* IP_VS_SCTP_EVE_COOKIE_ACK_CLI */ }, - {IP_VS_SCTP_S_SHUT_ACK_SER /* IP_VS_SCTP_EVE_COOKIE_ACK_SER */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_SER */ }, - /* - * SHUTDOWN sent from the client, move to SHUDDOWN_CLI - */ - {IP_VS_SCTP_S_SHUT_CLI /* IP_VS_SCTP_EVE_SHUT_CLI */ }, - /* - * SHUTDOWN sent from the server, move to SHUTDOWN_SER - */ - {IP_VS_SCTP_S_SHUT_SER /* IP_VS_SCTP_EVE_SHUT_SER */ }, - /* - * client sent SHUDTDOWN_ACK, this should not happen let's close - * the connection. - */ - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_ACK_CLI */ }, - /* - * Server resent SHUTDOWN ACK, stay in the same state - */ - {IP_VS_SCTP_S_SHUT_ACK_SER /* IP_VS_SCTP_EVE_SHUT_ACK_SER */ }, - /* - * SHUTDOWN COM from client, this what we are expecting, let's close - * the connection - */ - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_CLI */ }, - /* - * SHUTDOWN COMPLETE from server this should not happen. - */ - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_SER */ } - }, - /* - * State : IP_VS_SCTP_S_CLOSED - */ - {{IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_DATA_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_DATA_SER */ }, - {IP_VS_SCTP_S_INIT_CLI /* IP_VS_SCTP_EVE_INIT_CLI */ }, - {IP_VS_SCTP_S_INIT_SER /* IP_VS_SCTP_EVE_INIT_SER */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_INIT_ACK_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_INIT_ACK_SER */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_COOKIE_ECHO_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_COOKIE_ECHO_SER */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_COOKIE_ACK_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_COOKIE_ACK_SER */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_SER */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_SER */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_ACK_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_ACK_SER */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_CLI */ }, - {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_SER */ } - } +#define sNO IP_VS_SCTP_S_NONE +#define sI1 IP_VS_SCTP_S_INIT1 +#define sIN IP_VS_SCTP_S_INIT +#define sCS IP_VS_SCTP_S_COOKIE_SENT +#define sCR IP_VS_SCTP_S_COOKIE_REPLIED +#define sCW IP_VS_SCTP_S_COOKIE_WAIT +#define sCO IP_VS_SCTP_S_COOKIE +#define sCE IP_VS_SCTP_S_COOKIE_ECHOED +#define sES IP_VS_SCTP_S_ESTABLISHED +#define sSS IP_VS_SCTP_S_SHUTDOWN_SENT +#define sSR IP_VS_SCTP_S_SHUTDOWN_RECEIVED +#define sSA IP_VS_SCTP_S_SHUTDOWN_ACK_SENT +#define sRJ IP_VS_SCTP_S_REJECTED +#define sCL IP_VS_SCTP_S_CLOSED + +static const __u8 sctp_states + [IP_VS_DIR_LAST][IP_VS_SCTP_EVENT_LAST][IP_VS_SCTP_S_LAST] = { + { /* INPUT */ +/* sNO, sI1, sIN, sCS, sCR, sCW, sCO, sCE, sES, sSS, sSR, sSA, sRJ, sCL*/ +/* d */{sES, sI1, sIN, sCS, sCR, sCW, sCO, sCE, sES, sSS, sSR, sSA, sRJ, sCL}, +/* i */{sI1, sIN, sIN, sCS, sCR, sCW, sCO, sCE, sES, sSS, sSR, sSA, sIN, sIN}, +/* i_a */{sCW, sCW, sCW, sCS, sCR, sCO, sCO, sCE, sES, sSS, sSR, sSA, sRJ, sCL}, +/* c_e */{sCR, sIN, sIN, sCR, sCR, sCW, sCO, sCE, sES, sSS, sSR, sSA, sRJ, sCL}, +/* c_a */{sES, sI1, sIN, sCS, sCR, sCW, sCO, sES, sES, sSS, sSR, sSA, sRJ, sCL}, +/* s */{sSR, sI1, sIN, sCS, sCR, sCW, sCO, sCE, sSR, sSS, sSR, sSA, sRJ, sCL}, +/* s_a */{sCL, sIN, sIN, sCS, sCR, sCW, sCO, sCE, sES, sCL, sSR, sCL, sRJ, sCL}, +/* s_c */{sCL, sCL, sCL, sCS, sCR, sCW, sCO, sCE, sES, sSS, sSR, sCL, sRJ, sCL}, +/* err */{sCL, sI1, sIN, sCS, sCR, sCW, sCO, sCL, sES, sSS, sSR, sSA, sRJ, sCL}, +/* ab */{sCL, sCL, sCL, sCL, sCL, sRJ, sCL, sCL, sCL, sCL, sCL, sCL, sCL, sCL}, + }, + { /* OUTPUT */ +/* sNO, sI1, sIN, sCS, sCR, sCW, sCO, sCE, sES, sSS, sSR, sSA, sRJ, sCL*/ +/* d */{sES, sI1, sIN, sCS, sCR, sCW, sCO, sCE, sES, sSS, sSR, sSA, sRJ, sCL}, +/* i */{sCW, sCW, sCW, sCW, sCW, sCW, sCW, sCW, sES, sCW, sCW, sCW, sCW, sCW}, +/* i_a */{sCS, sCS, sCS, sCS, sCR, sCW, sCO, sCE, sES, sSS, sSR, sSA, sRJ, sCL}, +/* c_e */{sCE, sCE, sCE, sCE, sCE, sCE, sCE, sCE, sES, sSS, sSR, sSA, sRJ, sCL}, +/* c_a */{sES, sES, sES, sES, sES, sES, sES, sES, sES, sSS, sSR, sSA, sRJ, sCL}, +/* s */{sSS, sSS, sSS, sSS, sSS, sSS, sSS, sSS, sSS, sSS, sSR, sSA, sRJ, sCL}, +/* s_a */{sSA, sSA, sSA, sSA, sSA, sCW, sCO, sCE, sES, sSA, sSA, sSA, sRJ, sCL}, +/* s_c */{sCL, sI1, sIN, sCS, sCR, sCW, sCO, sCE, sES, sSS, sSR, sSA, sRJ, sCL}, +/* err */{sCL, sCL, sCL, sCL, sCL, sCW, sCO, sCE, sES, sSS, sSR, sSA, sRJ, sCL}, +/* ab */{sCL, sRJ, sCL, sCL, sCL, sCL, sCL, sCL, sCL, sCL, sCL, sCL, sCL, sCL}, + }, + { /* INPUT-ONLY */ +/* sNO, sI1, sIN, sCS, sCR, sCW, sCO, sCE, sES, sSS, sSR, sSA, sRJ, sCL*/ +/* d */{sES, sI1, sIN, sCS, sCR, sES, sCO, sCE, sES, sSS, sSR, sSA, sRJ, sCL}, +/* i */{sI1, sIN, sIN, sIN, sIN, sIN, sCO, sCE, sES, sSS, sSR, sSA, sIN, sIN}, +/* i_a */{sCE, sCE, sCE, sCE, sCE, sCE, sCO, sCE, sES, sSS, sSR, sSA, sRJ, sCL}, +/* c_e */{sES, sES, sES, sES, sES, sES, sCO, sCE, sES, sSS, sSR, sSA, sRJ, sCL}, +/* c_a */{sES, sI1, sIN, sES, sES, sCW, sES, sES, sES, sSS, sSR, sSA, sRJ, sCL}, +/* s */{sSR, sI1, sIN, sCS, sCR, sCW, sCO, sCE, sSR, sSS, sSR, sSA, sRJ, sCL}, +/* s_a */{sCL, sIN, sIN, sCS, sCR, sCW, sCO, sCE, sCL, sCL, sSR, sCL, sRJ, sCL}, +/* s_c */{sCL, sCL, sCL, sCL, sCL, sCW, sCO, sCE, sES, sSS, sCL, sCL, sRJ, sCL}, +/* err */{sCL, sI1, sIN, sCS, sCR, sCW, sCO, sCE, sES, sSS, sSR, sSA, sRJ, sCL}, +/* ab */{sCL, sCL, sCL, sCL, sCL, sRJ, sCL, sCL, sCL, sCL, sCL, sCL, sCL, sCL}, + }, }; -/* - * Timeout table[state] - */ +#define IP_VS_SCTP_MAX_RTO ((60 + 1) * HZ) + +/* Timeout table[state] */ static const int sctp_timeouts[IP_VS_SCTP_S_LAST + 1] = { - [IP_VS_SCTP_S_NONE] = 2 * HZ, - [IP_VS_SCTP_S_INIT_CLI] = 1 * 60 * HZ, - [IP_VS_SCTP_S_INIT_SER] = 1 * 60 * HZ, - [IP_VS_SCTP_S_INIT_ACK_CLI] = 1 * 60 * HZ, - [IP_VS_SCTP_S_INIT_ACK_SER] = 1 * 60 * HZ, - [IP_VS_SCTP_S_ECHO_CLI] = 1 * 60 * HZ, - [IP_VS_SCTP_S_ECHO_SER] = 1 * 60 * HZ, - [IP_VS_SCTP_S_ESTABLISHED] = 15 * 60 * HZ, - [IP_VS_SCTP_S_SHUT_CLI] = 1 * 60 * HZ, - [IP_VS_SCTP_S_SHUT_SER] = 1 * 60 * HZ, - [IP_VS_SCTP_S_SHUT_ACK_CLI] = 1 * 60 * HZ, - [IP_VS_SCTP_S_SHUT_ACK_SER] = 1 * 60 * HZ, - [IP_VS_SCTP_S_CLOSED] = 10 * HZ, - [IP_VS_SCTP_S_LAST] = 2 * HZ, + [IP_VS_SCTP_S_NONE] = 2 * HZ, + [IP_VS_SCTP_S_INIT1] = (0 + 3 + 1) * HZ, + [IP_VS_SCTP_S_INIT] = IP_VS_SCTP_MAX_RTO, + [IP_VS_SCTP_S_COOKIE_SENT] = IP_VS_SCTP_MAX_RTO, + [IP_VS_SCTP_S_COOKIE_REPLIED] = IP_VS_SCTP_MAX_RTO, + [IP_VS_SCTP_S_COOKIE_WAIT] = IP_VS_SCTP_MAX_RTO, + [IP_VS_SCTP_S_COOKIE] = IP_VS_SCTP_MAX_RTO, + [IP_VS_SCTP_S_COOKIE_ECHOED] = IP_VS_SCTP_MAX_RTO, + [IP_VS_SCTP_S_ESTABLISHED] = 15 * 60 * HZ, + [IP_VS_SCTP_S_SHUTDOWN_SENT] = IP_VS_SCTP_MAX_RTO, + [IP_VS_SCTP_S_SHUTDOWN_RECEIVED] = IP_VS_SCTP_MAX_RTO, + [IP_VS_SCTP_S_SHUTDOWN_ACK_SENT] = IP_VS_SCTP_MAX_RTO, + [IP_VS_SCTP_S_REJECTED] = (0 + 3 + 1) * HZ, + [IP_VS_SCTP_S_CLOSED] = IP_VS_SCTP_MAX_RTO, + [IP_VS_SCTP_S_LAST] = 2 * HZ, }; static const char *sctp_state_name_table[IP_VS_SCTP_S_LAST + 1] = { - [IP_VS_SCTP_S_NONE] = "NONE", - [IP_VS_SCTP_S_INIT_CLI] = "INIT_CLI", - [IP_VS_SCTP_S_INIT_SER] = "INIT_SER", - [IP_VS_SCTP_S_INIT_ACK_CLI] = "INIT_ACK_CLI", - [IP_VS_SCTP_S_INIT_ACK_SER] = "INIT_ACK_SER", - [IP_VS_SCTP_S_ECHO_CLI] = "COOKIE_ECHO_CLI", - [IP_VS_SCTP_S_ECHO_SER] = "COOKIE_ECHO_SER", - [IP_VS_SCTP_S_ESTABLISHED] = "ESTABISHED", - [IP_VS_SCTP_S_SHUT_CLI] = "SHUTDOWN_CLI", - [IP_VS_SCTP_S_SHUT_SER] = "SHUTDOWN_SER", - [IP_VS_SCTP_S_SHUT_ACK_CLI] = "SHUTDOWN_ACK_CLI", - [IP_VS_SCTP_S_SHUT_ACK_SER] = "SHUTDOWN_ACK_SER", - [IP_VS_SCTP_S_CLOSED] = "CLOSED", - [IP_VS_SCTP_S_LAST] = "BUG!" + [IP_VS_SCTP_S_NONE] = "NONE", + [IP_VS_SCTP_S_INIT1] = "INIT1", + [IP_VS_SCTP_S_INIT] = "INIT", + [IP_VS_SCTP_S_COOKIE_SENT] = "C-SENT", + [IP_VS_SCTP_S_COOKIE_REPLIED] = "C-REPLIED", + [IP_VS_SCTP_S_COOKIE_WAIT] = "C-WAIT", + [IP_VS_SCTP_S_COOKIE] = "COOKIE", + [IP_VS_SCTP_S_COOKIE_ECHOED] = "C-ECHOED", + [IP_VS_SCTP_S_ESTABLISHED] = "ESTABLISHED", + [IP_VS_SCTP_S_SHUTDOWN_SENT] = "S-SENT", + [IP_VS_SCTP_S_SHUTDOWN_RECEIVED] = "S-RECEIVED", + [IP_VS_SCTP_S_SHUTDOWN_ACK_SENT] = "S-ACK-SENT", + [IP_VS_SCTP_S_REJECTED] = "REJECTED", + [IP_VS_SCTP_S_CLOSED] = "CLOSED", + [IP_VS_SCTP_S_LAST] = "BUG!", }; @@ -945,17 +394,20 @@ set_sctp_state(struct ip_vs_proto_data *pd, struct ip_vs_conn *cp, } } - event = sctp_events[chunk_type]; + event = (chunk_type < sizeof(sctp_events)) ? + sctp_events[chunk_type] : IP_VS_SCTP_DATA; - /* - * If the direction is IP_VS_DIR_OUTPUT, this event is from server - */ - if (direction == IP_VS_DIR_OUTPUT) - event++; - /* - * get next state + /* Update direction to INPUT_ONLY if necessary + * or delete NO_OUTPUT flag if output packet detected */ - next_state = sctp_states_table[cp->state][event].next_state; + if (cp->flags & IP_VS_CONN_F_NOOUTPUT) { + if (direction == IP_VS_DIR_OUTPUT) + cp->flags &= ~IP_VS_CONN_F_NOOUTPUT; + else + direction = IP_VS_DIR_INPUT_ONLY; + } + + next_state = sctp_states[direction][event][cp->state]; if (next_state != cp->state) { struct ip_vs_dest *dest = cp->dest; diff --git a/net/netfilter/ipvs/ip_vs_sync.c b/net/netfilter/ipvs/ip_vs_sync.c index f6046d9..2fc6639 100644 --- a/net/netfilter/ipvs/ip_vs_sync.c +++ b/net/netfilter/ipvs/ip_vs_sync.c @@ -461,9 +461,10 @@ static int ip_vs_sync_conn_needed(struct netns_ipvs *ipvs, } else if (unlikely(cp->protocol == IPPROTO_SCTP)) { if (!((1 << cp->state) & ((1 << IP_VS_SCTP_S_ESTABLISHED) | - (1 << IP_VS_SCTP_S_CLOSED) | - (1 << IP_VS_SCTP_S_SHUT_ACK_CLI) | - (1 << IP_VS_SCTP_S_SHUT_ACK_SER)))) + (1 << IP_VS_SCTP_S_SHUTDOWN_SENT) | + (1 << IP_VS_SCTP_S_SHUTDOWN_RECEIVED) | + (1 << IP_VS_SCTP_S_SHUTDOWN_ACK_SENT) | + (1 << IP_VS_SCTP_S_CLOSED)))) return 0; force = cp->state != cp->old_state; if (force && cp->state != IP_VS_SCTP_S_ESTABLISHED) |