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Diffstat (limited to 'net/netfilter/ipvs/ip_vs_proto_sctp.c')
-rw-r--r--net/netfilter/ipvs/ip_vs_proto_sctp.c860
1 files changed, 157 insertions, 703 deletions
diff --git a/net/netfilter/ipvs/ip_vs_proto_sctp.c b/net/netfilter/ipvs/ip_vs_proto_sctp.c
index 86464881cd2..3c0da872803 100644
--- a/net/netfilter/ipvs/ip_vs_proto_sctp.c
+++ b/net/netfilter/ipvs/ip_vs_proto_sctp.c
@@ -15,6 +15,7 @@ sctp_conn_schedule(int af, struct sk_buff *skb, struct ip_vs_proto_data *pd,
{
struct net *net;
struct ip_vs_service *svc;
+ struct netns_ipvs *ipvs;
sctp_chunkhdr_t _schunkh, *sch;
sctp_sctphdr_t *sh, _sctph;
@@ -27,13 +28,14 @@ sctp_conn_schedule(int af, struct sk_buff *skb, struct ip_vs_proto_data *pd,
if (sch == NULL)
return 0;
net = skb_net(skb);
+ ipvs = net_ipvs(net);
rcu_read_lock();
- if ((sch->type == SCTP_CID_INIT) &&
+ if ((sch->type == SCTP_CID_INIT || sysctl_sloppy_sctp(ipvs)) &&
(svc = ip_vs_service_find(net, af, skb->mark, iph->protocol,
&iph->daddr, sh->dest))) {
int ignored;
- if (ip_vs_todrop(net_ipvs(net))) {
+ if (ip_vs_todrop(ipvs)) {
/*
* It seems that we are very loaded.
* We have to drop this packet :(
@@ -183,710 +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_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 */ },
- },
- /*
- * 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!",
};
@@ -943,17 +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;
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-28 17:07:52 +0000