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authormichele papalini <micpapal@cisco.com>2019-12-10 13:40:16 +0100
committermichele papalini <micpapal@cisco.com>2020-01-21 10:26:25 +0100
commit43980f3096655df2b2ecec50e700dd6989b0e0d6 (patch)
tree1a8e23e6fe645d8d1951b84f14e4123f17d4efe9 /hicn-light/src
parentde13ed1c3155f699cb1e322dcd4d64a06ae00bb9 (diff)
[HICN-442] new forwarding strategy
Signed-off-by: michele papalini <micpapal@cisco.com> Change-Id: I62c03bddedc83e523fc60f4b50d2c69e38b50318 Signed-off-by: Angelo Mantellini <angelo.mantellini@cisco.com> Signed-off-by: michele papalini <micpapal@cisco.com>
Diffstat (limited to 'hicn-light/src')
-rw-r--r--hicn-light/src/hicn/config/configurationFile.c3
-rw-r--r--hicn-light/src/hicn/config/controlAddListener.c8
-rw-r--r--hicn-light/src/hicn/config/controlSetStrategy.c6
-rw-r--r--hicn-light/src/hicn/core/connection.c46
-rw-r--r--hicn-light/src/hicn/core/connection.h11
-rw-r--r--hicn-light/src/hicn/core/messageHandler.h115
-rw-r--r--hicn-light/src/hicn/io/hicnConnection.c129
-rw-r--r--hicn-light/src/hicn/io/hicnListener.c31
-rw-r--r--hicn-light/src/hicn/io/ioOperations.c5
-rw-r--r--hicn-light/src/hicn/io/ioOperations.h5
-rw-r--r--hicn-light/src/hicn/io/streamConnection.c7
-rw-r--r--hicn-light/src/hicn/io/udpConnection.c23
-rw-r--r--hicn-light/src/hicn/io/udpListener.c13
-rw-r--r--hicn-light/src/hicn/processor/fib.c6
-rw-r--r--hicn-light/src/hicn/processor/fib.h2
-rw-r--r--hicn-light/src/hicn/processor/fibEntry.c75
-rw-r--r--hicn-light/src/hicn/processor/fibEntry.h10
-rw-r--r--hicn-light/src/hicn/processor/messageProcessor.c69
-rw-r--r--hicn-light/src/hicn/processor/pitStandard.c7
-rw-r--r--hicn-light/src/hicn/strategies/CMakeLists.txt10
-rw-r--r--hicn-light/src/hicn/strategies/loadBalancer.c6
-rw-r--r--hicn-light/src/hicn/strategies/loadBalancerWithPD.c468
-rw-r--r--hicn-light/src/hicn/strategies/loadBalancerWithPD.h31
-rw-r--r--hicn-light/src/hicn/strategies/lowLatency.c765
-rw-r--r--hicn-light/src/hicn/strategies/lowLatency.h (renamed from hicn-light/src/hicn/strategies/rndSegment.h)15
-rw-r--r--hicn-light/src/hicn/strategies/nexthopStateLowLatency.c481
-rw-r--r--hicn-light/src/hicn/strategies/nexthopStateLowLatency.h116
-rw-r--r--hicn-light/src/hicn/strategies/nexthopStateWithPD.c254
-rw-r--r--hicn-light/src/hicn/strategies/nexthopStateWithPD.h106
-rw-r--r--hicn-light/src/hicn/strategies/rnd.c20
-rw-r--r--hicn-light/src/hicn/strategies/rndSegment.c225
-rw-r--r--hicn-light/src/hicn/strategies/strategyImpl.h3
-rw-r--r--hicn-light/src/hicn/utils/commands.h3
33 files changed, 1620 insertions, 1454 deletions
diff --git a/hicn-light/src/hicn/config/configurationFile.c b/hicn-light/src/hicn/config/configurationFile.c
index 3cce740ac..5f9c9ce9d 100644
--- a/hicn-light/src/hicn/config/configurationFile.c
+++ b/hicn-light/src/hicn/config/configurationFile.c
@@ -288,6 +288,9 @@ bool configurationFile_Process(ConfigurationFile *configFile) {
}
success = false;
}
+ for(int i = 0; i < parcList_Size(args); i++){
+ free(parcList_GetAtIndex(args, i));
+ }
parcList_Release(&args);
parcMemory_Deallocate((void **)&copy);
}
diff --git a/hicn-light/src/hicn/config/controlAddListener.c b/hicn-light/src/hicn/config/controlAddListener.c
index d4537b855..2f0fd3f67 100644
--- a/hicn-light/src/hicn/config/controlAddListener.c
+++ b/hicn-light/src/hicn/config/controlAddListener.c
@@ -119,7 +119,13 @@ static CommandReturn _CreateListener(CommandParser *parser, CommandOps *ops,
}
// Fill remaining payload fields
- memcpy(addListenerCommand->interfaceName, interfaceName, SYMBOLIC_NAME_LEN);
+ size_t name_size = strlen((const char *)interfaceName);
+ if(name_size > SYMBOLIC_NAME_LEN){
+ //cut the string
+ name_size = SYMBOLIC_NAME_LEN;
+ }
+
+ memcpy(addListenerCommand->interfaceName, interfaceName, name_size);
addListenerCommand->listenerMode = mode;
addListenerCommand->connectionType = type;
addListenerCommand->port = htons((uint16_t)atoi(port));
diff --git a/hicn-light/src/hicn/config/controlSetStrategy.c b/hicn-light/src/hicn/config/controlSetStrategy.c
index 5357a413e..10fec964b 100644
--- a/hicn-light/src/hicn/config/controlSetStrategy.c
+++ b/hicn-light/src/hicn/config/controlSetStrategy.c
@@ -45,8 +45,7 @@ static const char *_commandSetStrategyHelp = "help set strategy";
static const char *_commandSetStrategyOptions[LAST_STRATEGY_VALUE] = {
"loadbalancer",
"random",
- "random_per_dash_segment",
- "loadbalancer_with_delay",
+ "low_latency",
};
// ====================================================
@@ -151,8 +150,7 @@ static CommandReturn _controlSetStrategy_HelpExecute(CommandParser *parser,
printf("available strategies:\n");
printf(" random\n");
printf(" loadbalancer\n");
- printf(" random_per_dash_segment\n");
- printf(" loadbalancer_with_delay\n");
+ printf(" low_latency\n");
printf("\n");
return CommandReturn_Success;
}
diff --git a/hicn-light/src/hicn/core/connection.c b/hicn-light/src/hicn/core/connection.c
index c1d143f70..c2ac71a5f 100644
--- a/hicn-light/src/hicn/core/connection.c
+++ b/hicn-light/src/hicn/core/connection.c
@@ -38,11 +38,7 @@ struct connection {
unsigned refCount;
- bool probing_active;
- unsigned probing_interval;
unsigned counter;
- Ticks last_sent;
- Ticks delay;
bool wldrAutoStart; // if true, wldr can be set automatically
// by default this value is set to true.
@@ -66,13 +62,9 @@ Connection *connection_Create(IoOperations *ops) {
conn->ops = ops;
conn->refCount = 1;
conn->wldr = NULL;
- conn->probing_active = false;
conn->wldrAutoStart = true;
- conn->probing_interval = 0;
conn->counter = 0;
- conn->last_sent = 0;
- conn->delay = INT_MAX;
/* By default, a connection will aim at the UP state */
connection_SetAdminState(conn, CONNECTION_STATE_UP);
@@ -138,19 +130,6 @@ bool connection_SendIOVBuffer(const Connection *conn, struct iovec *msg,
return ioOperations_SendIOVBuffer(conn->ops, msg, size);
}
-static void _sendProbe(Connection *conn, unsigned probeType, uint8_t *message) {
- parcAssertNotNull(conn, "Parameter conn must be non-null");
-
- if (probeType == PACKET_TYPE_PROBE_REQUEST) {
- Ticks now = ioOperations_SendProbe(conn->ops, probeType, message);
- if (now != 0) {
- conn->last_sent = now;
- }
- } else {
- ioOperations_SendProbe(conn->ops, probeType, message);
- }
-}
-
bool connection_SendBuffer(const Connection *conn, u8 * buffer, size_t length)
{
struct iovec iov[1];
@@ -159,33 +138,20 @@ bool connection_SendBuffer(const Connection *conn, u8 * buffer, size_t length)
return connection_SendIOVBuffer(conn, iov, 1);
}
-void connection_Probe(Connection *conn) {
- _sendProbe(conn, PACKET_TYPE_PROBE_REQUEST, NULL);
+void connection_Probe(Connection *conn, uint8_t * probe) {
+ ioOperations_SendProbe(conn->ops, probe);
}
-void connection_HandleProbe(Connection *conn, uint8_t *probe,
- Ticks actualTime) {
+void connection_HandleProbe(Connection *conn, uint8_t *probe){
parcAssertNotNull(conn, "Parameter conn must be non-null");
parcAssertNotNull(probe, "Parameter pkt must be non-null");
- uint8_t probeType = messageHandler_GetProbePacketType(probe);
- if (probeType == PACKET_TYPE_PROBE_REQUEST) {
- _sendProbe(conn, PACKET_TYPE_PROBE_REPLY, probe);
- } else if (probeType == PACKET_TYPE_PROBE_REPLY) {
- Ticks delay = actualTime - conn->last_sent;
- if (delay == 0) {
- delay = 1;
- }
- if (delay < conn->delay) {
- conn->delay = delay;
- }
- } else {
- printf("receivde unkwon probe type\n");
+ if(messageHandler_IsInterest(probe)){
+ messageHandler_CreateProbeReply(probe, HF_INET6_TCP);
+ ioOperations_SendProbe(conn->ops, probe);
}
}
-uint64_t connection_GetDelay(Connection *conn) { return (uint64_t)conn->delay; }
-
IoOperations *connection_GetIoOperations(const Connection *conn) {
return conn->ops;
}
diff --git a/hicn-light/src/hicn/core/connection.h b/hicn-light/src/hicn/core/connection.h
index d0d093064..b6513ea1a 100644
--- a/hicn-light/src/hicn/core/connection.h
+++ b/hicn-light/src/hicn/core/connection.h
@@ -46,10 +46,6 @@ typedef enum {
#include <hicn/policy.h>
#endif /* WITH_POLICY */
-// packet types for probing
-#define PACKET_TYPE_PROBE_REQUEST 5
-#define PACKET_TYPE_PROBE_REPLY 6
-
struct connection;
typedef struct connection Connection;
@@ -156,12 +152,9 @@ const void *connection_Class(const Connection *conn);
bool connection_ReSend(const Connection *conn, Message *message,
bool notification);
-void connection_Probe(Connection *conn);
-
-void connection_HandleProbe(Connection *conn, uint8_t *message,
- Ticks actualTime);
+void connection_Probe(Connection *conn, uint8_t *probe);
-uint64_t connection_GetDelay(Connection *conn);
+void connection_HandleProbe(Connection *conn, uint8_t *message);
void connection_AllowWldrAutoStart(Connection *conn, bool allow);
diff --git a/hicn-light/src/hicn/core/messageHandler.h b/hicn-light/src/hicn/core/messageHandler.h
index e2f0140e5..0bf6bebbe 100644
--- a/hicn-light/src/hicn/core/messageHandler.h
+++ b/hicn-light/src/hicn/core/messageHandler.h
@@ -63,6 +63,8 @@
#define CONNECTION_ID_UNDEFINED -1
+#define BFD_PORT 3784
+
static inline uint8_t messageHandler_GetIPPacketType(const uint8_t *message) {
return HICN_IP_VERSION(message);
}
@@ -491,23 +493,6 @@ static inline bool messageHandler_HasWldr(const uint8_t *message) {
return false;
}
-static inline uint8_t messageHandler_GetProbePacketType(
- const uint8_t *message) {
- const uint8_t *icmp_ptr;
- switch (messageHandler_GetIPPacketType(message)) {
- case IPv6_TYPE:
- icmp_ptr = message + IPV6_HDRLEN;
- break;
- case IPv4_TYPE:
- icmp_ptr = message + IPV4_HDRLEN;
- break;
- default:
- return 0;
- }
-
- return ((_icmp_header_t *)icmp_ptr)->code;
-}
-
static inline uint32_t messageHandler_GetPathLabel(const uint8_t *message) {
if (!messageHandler_IsTCP(message)) return 0;
@@ -707,31 +692,77 @@ static inline void messageHandler_SetWldrNotification(uint8_t *notification,
}
}
-static inline void messageHandler_SetProbePacket(uint8_t *message,
- uint8_t probeType,
- struct in6_addr *src,
- struct in6_addr *dst) {
- hicn_header_t *h = (hicn_header_t *)message;
- *h = (hicn_header_t){
- .v6 = {
- .ip =
- {
- .version_class_flow =
- htonl((IPV6_DEFAULT_VERSION << 28) |
- (IPV6_DEFAULT_TRAFFIC_CLASS << 20) |
- (IPV6_DEFAULT_FLOW_LABEL & 0xfffff)),
- .len = htons(ICMP_HDRLEN),
- .nxt = IPPROTO_ICMPV6,
- .hlim = 5, // this should be 1, but ... just to be safe
- },
- .icmp =
- {
- .type = ICMP_LB_TYPE,
- .code = probeType,
- },
- }};
- messageHandler_SetSource_IPv6(message, src);
- messageHandler_SetDestination_IPv6(message, dst);
+static inline uint8_t * messageHandler_CreateProbePacket(hicn_format_t format,
+ uint32_t probe_lifetime){
+ size_t header_length;
+ hicn_packet_get_header_length_from_format(format, &header_length);
+
+ uint8_t *pkt = parcMemory_AllocateAndClear(header_length);
+
+ hicn_packet_init_header(format, (hicn_header_t *) pkt);
+
+ hicn_packet_set_dst_port((hicn_header_t *) pkt, BFD_PORT);
+ hicn_interest_set_lifetime ((hicn_header_t *) pkt, probe_lifetime);
+
+ return pkt;
+}
+
+static inline void messageHandler_CreateProbeReply(uint8_t * probe,
+ hicn_format_t format){
+
+ hicn_name_t probe_name;
+ hicn_interest_get_name (format,
+ (const hicn_header_t *) probe, &probe_name);
+ ip_address_t probe_locator;
+ hicn_interest_get_locator (format,
+ (const hicn_header_t *) probe, &probe_locator);
+
+ uint16_t src_prt;
+ uint16_t dst_prt;
+ hicn_packet_get_src_port((const hicn_header_t *) probe, &src_prt);
+ hicn_packet_get_dst_port((const hicn_header_t *) probe, &dst_prt);
+ hicn_packet_set_src_port((hicn_header_t *) probe, dst_prt);
+ hicn_packet_set_dst_port((hicn_header_t *) probe, src_prt);
+
+ hicn_data_set_name (format, (hicn_header_t *) probe, &probe_name);
+ hicn_data_set_locator (format, (hicn_header_t *) probe, &probe_locator);
+ hicn_data_set_expiry_time ((hicn_header_t *) probe, 0);
+}
+
+static inline hicn_name_t * messageHandler_CreateProbeName(const ip_prefix_t *address){
+ hicn_name_t * name = parcMemory_AllocateAndClear(sizeof(hicn_name_t));
+ hicn_name_create_from_ip_prefix(address, 0, name);
+ return name;
+}
+
+static inline void messageHandler_SetProbeName(uint8_t * probe, hicn_format_t format,
+ hicn_name_t * name, uint32_t seq){
+ hicn_name_set_seq_number (name, seq);
+ hicn_interest_set_name(format, (hicn_header_t *) probe, name);
+}
+
+static inline bool messageHandler_IsAProbe(const uint8_t *packet){
+ uint16_t src_prt;
+ uint16_t dst_prt;
+ hicn_packet_get_src_port ((const hicn_header_t *) packet, &src_prt);
+ hicn_packet_get_dst_port ((const hicn_header_t *) packet, &dst_prt);
+
+ if(dst_prt == BFD_PORT){
+ //interest probe
+ return true;
+ }
+
+ if(src_prt == BFD_PORT){
+ //data (could be a probe)
+ uint32_t expiry_time;
+ hicn_data_get_expiry_time ((const hicn_header_t *) packet, &expiry_time);
+ if(expiry_time == 0){
+ //this is a probe
+ return true;
+ }
+ }
+
+ return false;
}
#endif // Metis_metis_MessageHandler
diff --git a/hicn-light/src/hicn/io/hicnConnection.c b/hicn-light/src/hicn/io/hicnConnection.c
index e35454438..646cea990 100644
--- a/hicn-light/src/hicn/io/hicnConnection.c
+++ b/hicn-light/src/hicn/io/hicnConnection.c
@@ -56,18 +56,6 @@ typedef struct hicn_state {
struct sockaddr *localAddress;
socklen_t localAddressLength;
- // this address contains one of the content names reachable
- // throught the connection peer. We need this address beacuse it is
- // the only way we have to conntact the next hop, since the main tun
- // does not have address. Notice that a connection that sends probes
- // is a connection that sends interest. In a "data" connection this
- // value will remain NULL. We refresh the content address every time
- // we send a probe, in this way we don't need to waste to much time in
- // copy the address, but we can also react to the routing changes
- struct sockaddr *probeDestAddress;
- socklen_t probeDestAddressLength;
- bool refreshProbeDestAddress;
-
bool isLocal;
bool isUp;
unsigned id;
@@ -94,8 +82,7 @@ static bool _isUp(const IoOperations *ops);
static bool _isLocal(const IoOperations *ops);
static void _destroy(IoOperations **opsPtr);
static list_connections_type _getConnectionType(const IoOperations *ops);
-static Ticks _sendProbe(IoOperations *ops, unsigned probeType,
- uint8_t *message);
+static void _sendProbe(IoOperations *ops, uint8_t *message);
static connection_state_t _getState(const IoOperations *ops);
static void _setState(IoOperations *ops, connection_state_t state);
static connection_state_t _getAdminState(const IoOperations *ops);
@@ -147,8 +134,6 @@ static IoOperations _template = {
static void _setConnectionState(_HicnState *Hicn, bool isUp);
static bool _saveSockaddr(_HicnState *hicnConnState, const AddressPair *pair);
-static void _refreshProbeDestAddress(_HicnState *hicnConnState,
- const uint8_t *message);
IoOperations *hicnConnection_Create(Forwarder *forwarder, const char * interfaceName, int fd,
const AddressPair *pair, bool isLocal) {
@@ -225,8 +210,6 @@ static void _destroy(IoOperations **opsPtr) {
addressPair_Release(&hicnConnState->addressPair);
parcMemory_Deallocate((void **)&(hicnConnState->peerAddress));
parcMemory_Deallocate((void **)&(hicnConnState->localAddress));
- if (hicnConnState->probeDestAddress != NULL)
- parcMemory_Deallocate((void **)&(hicnConnState->probeDestAddress));
messenger_Send(
forwarder_GetMessenger(hicnConnState->forwarder),
@@ -328,12 +311,6 @@ static bool _send(IoOperations *ops, const Address *dummy, Message *message) {
&(((struct sockaddr_in *)hicnConnState->localAddress)
->sin_addr.s_addr));
}
-
- // only in this case we may need to set the probeDestAddress
- if (hicnConnState->refreshProbeDestAddress) {
- _refreshProbeDestAddress(hicnConnState, message_FixedHeader(message));
- }
-
} else if (message_GetType(message) == MessagePacketType_WldrNotification) {
// here we don't need to do anything for now
} else {
@@ -395,64 +372,31 @@ static list_connections_type _getConnectionType(const IoOperations *ops) {
return CONN_HICN;
}
-static Ticks _sendProbe(IoOperations *ops, unsigned probeType,
- uint8_t *message) {
+static void _sendProbe(IoOperations *ops, uint8_t *message) {
parcAssertNotNull(ops, "Parameter ops must be non-null");
- _HicnState *hicnConnState = (_HicnState *)ioOperations_GetClosure(ops);
-
- if ((hicnConnState->peerAddressLength == sizeof(struct sockaddr_in)) ||
- (hicnConnState->localAddressLength == sizeof(struct sockaddr_in)))
- return false;
-
- if (hicnConnState->probeDestAddress == NULL &&
- probeType == PACKET_TYPE_PROBE_REPLY) {
- uint8_t *pkt = parcMemory_AllocateAndClear(
- messageHandler_GetICMPPacketSize(IPv6_TYPE));
- messageHandler_SetProbePacket(
- pkt, probeType,
- (struct in6_addr *)messageHandler_GetDestination(message),
- (struct in6_addr *)messageHandler_GetSource(message));
-
- ssize_t writeLength = write(hicnConnState->hicnListenerSocket, pkt,
- messageHandler_GetICMPPacketSize(IPv6_TYPE));
- parcMemory_Deallocate((void **)&pkt);
+ _HicnState *hicnConnState = (_HicnState *)ioOperations_GetClosure(ops);
- if (writeLength < 0) {
- return 0;
+ if(messageHandler_IsInterest(message)){//
+ // this is an interest packet. We need to put the local address in the
+ // source field
+ if (messageHandler_GetIPPacketType(message) == IPv6_TYPE) {
+ messageHandler_SetSource_IPv6(message,
+ &((struct sockaddr_in6 *)hicnConnState->localAddress)->sin6_addr);
+ } else {
+ messageHandler_SetSource_IPv4(message,
+ &(((struct sockaddr_in *)hicnConnState->localAddress)
+ ->sin_addr.s_addr));
}
+ }//if is a data packet the packet is already set (see
+ //messageHandler_CreateProbeReply)
- } else if (hicnConnState->probeDestAddress != NULL &&
- probeType == PACKET_TYPE_PROBE_REQUEST) {
- hicnConnState->refreshProbeDestAddress = true;
-
- uint8_t *pkt = parcMemory_AllocateAndClear(
- messageHandler_GetICMPPacketSize(IPv6_TYPE));
- messageHandler_SetProbePacket(
- pkt, probeType,
- &((struct sockaddr_in6 *)hicnConnState->localAddress)->sin6_addr,
- &((struct sockaddr_in6 *)hicnConnState->probeDestAddress)->sin6_addr);
-
- ssize_t writeLength = write(hicnConnState->hicnListenerSocket, pkt,
- messageHandler_GetICMPPacketSize(IPv6_TYPE));
-
- parcMemory_Deallocate((void **)&pkt);
+ ssize_t writeLength = write(hicnConnState->hicnListenerSocket, message,
+ messageHandler_GetTotalPacketLength(message));
- if (writeLength < 0) {
- return 0;
- }
-
- } else {
- if (hicnConnState->probeDestAddress == NULL &&
- probeType == PACKET_TYPE_PROBE_REQUEST) {
- // this happen for the first probe
- hicnConnState->refreshProbeDestAddress = true;
- }
- // do nothing
- return 0;
+ if (writeLength < 0) {
+ return;
}
-
- return forwarder_GetTicks(hicnConnState->forwarder);
}
// =================================================================
@@ -481,11 +425,6 @@ static bool _saveSockaddr(_HicnState *hicnConnState, const AddressPair *pair) {
addressGetInet(localAddress,
(struct sockaddr_in *)hicnConnState->localAddress);
hicnConnState->localAddressLength = (socklen_t)bytes;
-
- hicnConnState->probeDestAddress = NULL;
- hicnConnState->probeDestAddressLength = (socklen_t)bytes;
- hicnConnState->refreshProbeDestAddress = false;
-
success = true;
break;
}
@@ -507,11 +446,6 @@ static bool _saveSockaddr(_HicnState *hicnConnState, const AddressPair *pair) {
addressGetInet6(localAddress,
(struct sockaddr_in6 *)hicnConnState->localAddress);
hicnConnState->localAddressLength = (socklen_t)bytes;
-
- hicnConnState->probeDestAddress = NULL;
- hicnConnState->probeDestAddressLength = (socklen_t)bytes;
- hicnConnState->refreshProbeDestAddress = false;
-
success = true;
break;
}
@@ -529,31 +463,6 @@ static bool _saveSockaddr(_HicnState *hicnConnState, const AddressPair *pair) {
return success;
}
-static void _refreshProbeDestAddress(_HicnState *hicnConnState,
- const uint8_t *message) {
- if ((hicnConnState->peerAddressLength == sizeof(struct sockaddr_in)) ||
- (hicnConnState->localAddressLength == sizeof(struct sockaddr_in)))
- return;
-
- if (hicnConnState->probeDestAddress == NULL) {
- hicnConnState->probeDestAddress =
- parcMemory_AllocateAndClear(sizeof(struct sockaddr_in6));
- parcAssertNotNull(hicnConnState->probeDestAddress,
- "parcMemory_Allocate(%zu) returned NULL",
- sizeof(struct sockaddr_in6));
- }
-
- ((struct sockaddr_in6 *)hicnConnState->probeDestAddress)->sin6_family =
- AF_INET6;
- ((struct sockaddr_in6 *)hicnConnState->probeDestAddress)->sin6_port =
- htons(1234);
- ((struct sockaddr_in6 *)hicnConnState->probeDestAddress)->sin6_scope_id = 0;
- ((struct sockaddr_in6 *)hicnConnState->probeDestAddress)->sin6_flowinfo = 0;
- ((struct sockaddr_in6 *)hicnConnState->probeDestAddress)->sin6_addr =
- *((struct in6_addr *)messageHandler_GetDestination(message));
- hicnConnState->refreshProbeDestAddress = false;
-}
-
static void _setConnectionState(_HicnState *hicnConnState, bool isUp) {
parcAssertNotNull(hicnConnState, "Parameter HICN must be non-null");
diff --git a/hicn-light/src/hicn/io/hicnListener.c b/hicn-light/src/hicn/io/hicnListener.c
index 5a47982ff..bc49f4cee 100644
--- a/hicn-light/src/hicn/io/hicnListener.c
+++ b/hicn-light/src/hicn/io/hicnListener.c
@@ -85,7 +85,6 @@ static const Connection * _lookupConnection(ListenerOps * listener, const Addres
static Message *_readMessage(ListenerOps * listener, int fd, uint8_t *msgBuffer);
static void _hicnListener_readcb(int fd, PARCEventType what, void *listener_void);
static Address *_createAddressFromPacket(uint8_t *msgBuffer);
-static void _handleProbeMessage(ListenerOps * listener, uint8_t *msgBuffer);
static void _handleWldrNotification(ListenerOps *listener, uint8_t *msgBuffer);
static void _readFrameToDiscard(HicnListener *hicn, int fd);
@@ -182,8 +181,6 @@ static Message *_readMessage(ListenerOps * listener, int fd, uint8_t *msgBuffer)
}
} else if (messageHandler_IsWldrNotification(msgBuffer)) {
_handleWldrNotification(listener, msgBuffer);
- } else if (messageHandler_IsLoadBalancerProbe(msgBuffer)) {
- _handleProbeMessage(listener, msgBuffer);
} else {
messageHandler_handleHooks(hicn->forwarder, msgBuffer, listener, fd, NULL);
parcMemory_Deallocate((void **)&msgBuffer);
@@ -639,29 +636,6 @@ static Address *_createAddressFromPacket(uint8_t *msgBuffer) {
return packetAddr;
}
-static void _handleProbeMessage(ListenerOps * listener, uint8_t *msgBuffer) {
- HicnListener * hicn = (HicnListener *)listener->context;
-
- Address *packetAddr = _createAddressFromPacket(msgBuffer);
- AddressPair * pair = addressPair_Create(packetAddr, /* dummy */ hicn->localAddress);
-
- if (!packetAddr)
- goto DROP;
-
- // we drop all the probes for a connection that does not exists
- const Connection *conn = _lookupConnection(listener, pair);
- if (!conn)
- goto DROP;
-
- connection_HandleProbe((Connection *)conn, msgBuffer,
- forwarder_GetTicks(hicn->forwarder));
-
-DROP:
- addressPair_Release(&pair);
- addressDestroy(&packetAddr);
- parcMemory_Deallocate((void **)&msgBuffer);
-}
-
static void _handleWldrNotification(ListenerOps *listener, uint8_t *msgBuffer) {
HicnListener * hicn = (HicnListener *)listener->context;
@@ -693,8 +667,3 @@ static void _handleWldrNotification(ListenerOps *listener, uint8_t *msgBuffer) {
message_Release(&message);
}
-
-
-
-
-
diff --git a/hicn-light/src/hicn/io/ioOperations.c b/hicn-light/src/hicn/io/ioOperations.c
index 336e9f12e..0087b320a 100644
--- a/hicn-light/src/hicn/io/ioOperations.c
+++ b/hicn-light/src/hicn/io/ioOperations.c
@@ -64,9 +64,8 @@ list_connections_type ioOperations_GetConnectionType(const IoOperations *ops) {
return ops->getConnectionType(ops);
}
-Ticks ioOperations_SendProbe(IoOperations *ops, unsigned probeType,
- uint8_t *message) {
- return ops->sendProbe(ops, probeType, message);
+void ioOperations_SendProbe(IoOperations *ops, uint8_t *message) {
+ ops->sendProbe(ops, message);
}
diff --git a/hicn-light/src/hicn/io/ioOperations.h b/hicn-light/src/hicn/io/ioOperations.h
index ee8720e77..5d9befac3 100644
--- a/hicn-light/src/hicn/io/ioOperations.h
+++ b/hicn-light/src/hicn/io/ioOperations.h
@@ -84,7 +84,7 @@ struct io_ops {
void (*destroy)(IoOperations **opsPtr);
const void *(*class)(const IoOperations *ops);
list_connections_type (*getConnectionType)(const IoOperations *ops);
- Ticks (*sendProbe)(IoOperations *ops, unsigned probeType, uint8_t *message);
+ void (*sendProbe)(IoOperations *ops, uint8_t *message);
connection_state_t (*getState)(const IoOperations *ops);
void (*setState)(IoOperations *ops, connection_state_t state);
connection_state_t (*getAdminState)(const IoOperations *ops);
@@ -382,8 +382,7 @@ const void *ioOperations_Class(const IoOperations *ops);
*/
list_connections_type ioOperations_GetConnectionType(const IoOperations *ops);
-Ticks ioOperations_SendProbe(IoOperations *ops, unsigned probeType,
- uint8_t *message);
+void ioOperations_SendProbe(IoOperations *ops, uint8_t *message);
/**
diff --git a/hicn-light/src/hicn/io/streamConnection.c b/hicn-light/src/hicn/io/streamConnection.c
index 27ec45d48..00298d1b0 100644
--- a/hicn-light/src/hicn/io/streamConnection.c
+++ b/hicn-light/src/hicn/io/streamConnection.c
@@ -88,8 +88,7 @@ static void _streamConnection_DestroyOperations(IoOperations **opsPtr);
static void _setConnectionState(_StreamState *stream, bool isUp);
static list_connections_type _streamConnection_GetConnectionType(
const IoOperations *ops);
-static Ticks _sendProbe(IoOperations *ops, unsigned probeType,
- uint8_t *message);
+static void _sendProbe(IoOperations *ops, uint8_t *message);
static connection_state_t _streamConnection_getState(const IoOperations *ops);
static void _streamConnection_setState(IoOperations *ops, connection_state_t state);
static connection_state_t _streamConnection_getAdminState(const IoOperations *ops);
@@ -437,10 +436,8 @@ list_connections_type _streamConnection_GetConnectionType(
return CONN_TCP;
}
-static Ticks _sendProbe(IoOperations *ops, unsigned probeType,
- uint8_t *message) {
+static void _sendProbe(IoOperations *ops, uint8_t *message) {
// we don't need to implemet this here, it is a local connection
- return 0;
}
// =================================================================
diff --git a/hicn-light/src/hicn/io/udpConnection.c b/hicn-light/src/hicn/io/udpConnection.c
index 4e29eba7d..b22b1227f 100644
--- a/hicn-light/src/hicn/io/udpConnection.c
+++ b/hicn-light/src/hicn/io/udpConnection.c
@@ -79,8 +79,7 @@ static bool _isUp(const IoOperations *ops);
static bool _isLocal(const IoOperations *ops);
static void _destroy(IoOperations **opsPtr);
static list_connections_type _getConnectionType(const IoOperations *ops);
-static Ticks _sendProbe(IoOperations *ops, unsigned probeType,
- uint8_t *message);
+static void _sendProbe(IoOperations *ops, uint8_t *message);
static connection_state_t _getState(const IoOperations *ops);
static void _setState(IoOperations *ops, connection_state_t state);
static connection_state_t _getAdminState(const IoOperations *ops);
@@ -350,10 +349,22 @@ static list_connections_type _getConnectionType(const IoOperations *ops) {
return CONN_UDP;
}
-static Ticks _sendProbe(IoOperations *ops, unsigned probeType,
- uint8_t *message) {
- //TODO
- return 0;
+static void _sendProbe(IoOperations *ops, uint8_t *message) {
+ parcAssertNotNull(ops, "Parameter ops must be non-null");
+ parcAssertNotNull(message, "Parameter message must be non-null");
+ _UdpState *udpConnState = (_UdpState *)ioOperations_GetClosure(ops);
+
+ if(udpConnState->isLocal)
+ return;
+
+ ssize_t writeLength =
+ sendto(udpConnState->udpListenerSocket, message,
+ messageHandler_GetTotalPacketLength(message), 0, udpConnState->peerAddress,
+ udpConnState->peerAddressLength);
+
+ if (writeLength < 0) {
+ return;
+ }
}
// =================================================================
diff --git a/hicn-light/src/hicn/io/udpListener.c b/hicn-light/src/hicn/io/udpListener.c
index ebb24022e..21b4f6190 100644
--- a/hicn-light/src/hicn/io/udpListener.c
+++ b/hicn-light/src/hicn/io/udpListener.c
@@ -476,11 +476,6 @@ static unsigned _createNewConnection(ListenerOps * listener, int fd,
return connid;
}
-static void _handleProbeMessage(UdpListener *udp, uint8_t *msgBuffer) {
- // TODO
- parcMemory_Deallocate((void **)&msgBuffer);
-}
-
static void _handleWldrNotification(UdpListener *udp, unsigned connId,
uint8_t *msgBuffer) {
const Connection *conn = connectionTable_FindById(
@@ -547,16 +542,8 @@ static Message *_readMessage(ListenerOps * listener, int fd,
} else if (messageHandler_IsWldrNotification(packet)) {
*processed = true;
_handleWldrNotification(udp, connid, packet);
- } else if (messageHandler_IsLoadBalancerProbe(packet)) {
- *processed = true;
- _handleProbeMessage(udp, packet);
} else {
-#if 0
- if (!foundConnection)
- connid = _createNewConnection(listener, fd, pair);
-#endif
-
*processed = messageHandler_handleHooks(udp->forwarder, packet, listener, fd, pair);
}
diff --git a/hicn-light/src/hicn/processor/fib.c b/hicn-light/src/hicn/processor/fib.c
index c67bc6773..8822134fe 100644
--- a/hicn-light/src/hicn/processor/fib.c
+++ b/hicn-light/src/hicn/processor/fib.c
@@ -200,8 +200,10 @@ void fib_Add(FIB *fib, FibEntry *entry) {
nameBitvector_clear(name_GetContentName(inner_prefix), match_len);
name_setLen(inner_prefix, match_len);
- FibEntry * inner_entry = fibEntry_Create(inner_prefix, SET_STRATEGY_LOADBALANCER,
- fib->forwarder);
+ //this is an inner node, we don't want an acctive strategy
+ //like low_latency that sends probes in this node
+ FibEntry * inner_entry = fibEntry_Create(inner_prefix,
+ SET_STRATEGY_LOADBALANCER, fib->forwarder);
FibNode * inner_node = _createNode(NULL, NULL, inner_entry, false);
FibNode * new_node = _createNode(NULL, NULL, entry, true);
diff --git a/hicn-light/src/hicn/processor/fib.h b/hicn-light/src/hicn/processor/fib.h
index 7507bb85c..ef9e121b8 100644
--- a/hicn-light/src/hicn/processor/fib.h
+++ b/hicn-light/src/hicn/processor/fib.h
@@ -23,7 +23,7 @@
struct fib;
typedef struct fib FIB;
-FIB *fib_Create();
+FIB *fib_Create(Forwarder *forwarder);
void fib_Destroy(FIB **fibPtr);
diff --git a/hicn-light/src/hicn/processor/fibEntry.c b/hicn-light/src/hicn/processor/fibEntry.c
index fe32ada8d..be7278987 100644
--- a/hicn-light/src/hicn/processor/fibEntry.c
+++ b/hicn-light/src/hicn/processor/fibEntry.c
@@ -22,9 +22,8 @@
#include <hicn/core/nameBitvector.h>
#include <hicn/strategies/loadBalancer.h>
-#include <hicn/strategies/loadBalancerWithPD.h>
+#include <hicn/strategies/lowLatency.h>
#include <hicn/strategies/rnd.h>
-#include <hicn/strategies/rndSegment.h>
#include <hicn/strategies/strategyImpl.h>
#ifdef WITH_MAPME
#include <parc/algol/parc_HashMap.h>
@@ -80,34 +79,23 @@ FibEntry *fibEntry_Create(Name *name, strategy_type fwdStrategy) {
sizeof(FibEntry));
fibEntry->name = name_Acquire(name);
- if (fwdStrategy) {
- switch (fwdStrategy) {
- case SET_STRATEGY_LOADBALANCER:
- fibEntry->fwdStrategy = strategyLoadBalancer_Create();
- break;
-
- case SET_STRATEGY_RANDOM:
- fibEntry->fwdStrategy = strategyRnd_Create();
- break;
-
- case SET_STRATEGY_RANDOM_PER_DASH_SEGMENT:
- fibEntry->fwdStrategy = strategyRndSegment_Create();
- break;
-
- case SET_STRATEGY_LOADBALANCER_WITH_DELAY:
- fibEntry->fwdStrategy = strategyLoadBalancerWithPD_Create();
- break;
-
- default:
- // LB is the default strategy
- fibEntry->fwdStrategy = strategyLoadBalancer_Create();
- // the LB strategy is the default one
- // other strategies can be set using the appropiate function
- break;
- }
+ switch (fwdStrategy) {
+ case SET_STRATEGY_LOADBALANCER:
+ fibEntry->fwdStrategy = strategyLoadBalancer_Create();
+ break;
- } else {
- fibEntry->fwdStrategy = strategyLoadBalancer_Create();
+ case SET_STRATEGY_RANDOM:
+ fibEntry->fwdStrategy = strategyRnd_Create();
+
+ case SET_STRATEGY_LOW_LATENCY:
+ fibEntry->fwdStrategy = strategyLowLatency_Create();
+ break;
+
+ default:
+ // LB is the default strategy
+ fwdStrategy = SET_STRATEGY_LOADBALANCER;
+ fibEntry->fwdStrategy = strategyLoadBalancer_Create();
+ break;
}
fibEntry->refcount = 1;
@@ -124,6 +112,10 @@ FibEntry *fibEntry_Create(Name *name, strategy_type fwdStrategy) {
fibEntry->policy_counters = POLICY_COUNTERS_NONE;
#endif /* WITH_POLICY */
+ if(fwdStrategy == SET_STRATEGY_LOW_LATENCY){
+ strategyLowLatency_SetStrategy(fibEntry->fwdStrategy,
+ fibEntry->forwarder, fibEntry);
+ }
return fibEntry;
}
@@ -166,20 +158,20 @@ void fibEntry_SetStrategy(FibEntry *fibEntry, strategy_type strategy) {
fwdStrategyImpl = strategyRnd_Create();
break;
- case SET_STRATEGY_RANDOM_PER_DASH_SEGMENT:
- fwdStrategyImpl = strategyRndSegment_Create();
- break;
-
- case SET_STRATEGY_LOADBALANCER_WITH_DELAY:
- fwdStrategyImpl = strategyLoadBalancerWithPD_Create();
+ case SET_STRATEGY_LOW_LATENCY:
+ fwdStrategyImpl = strategyLowLatency_Create();
break;
default:
- // LB is the defualt strategy
+ // LB is the default strategy
+ strategy = SET_STRATEGY_LOADBALANCER;
fwdStrategyImpl = strategyLoadBalancer_Create();
- // the LB strategy is the default one
- // other strategies can be set using the appropiate function
break;
+ }
+
+ if(strategy == SET_STRATEGY_LOW_LATENCY){
+ strategyLowLatency_SetStrategy(fwdStrategyImpl,
+ fibEntry->forwarder, fibEntry);
}
const NumberSet *nexthops = fibEntry_GetNexthops(fibEntry);
@@ -613,7 +605,9 @@ void fibEntry_ReceiveObjectMessage(FibEntry *fibEntry,
void fibEntry_ReceiveObjectMessage(const FibEntry *fibEntry,
#endif /* WITH_POLICY */
const NumberSet *egressId,
- const Message *objectMessage, Ticks rtt) {
+ const Message *objectMessage,
+ Ticks pitEntryCreation,
+ Ticks objReception) {
parcAssertNotNull(fibEntry, "Parameter fibEntry must be non-null");
#ifdef WITH_POLICY
@@ -622,6 +616,7 @@ void fibEntry_ReceiveObjectMessage(const FibEntry *fibEntry,
/* Update statistic counters : */
size_t msg_size = message_Length(objectMessage);
+ Ticks rtt = objReception - pitEntryCreation;
for (unsigned i = 0; i < numberSet_Length(egressId); i++) {
unsigned conn_id = numberSet_GetItem(egressId, i);
@@ -666,7 +661,7 @@ void fibEntry_ReceiveObjectMessage(const FibEntry *fibEntry,
#endif /* WITH_POLICY */
fibEntry->fwdStrategy->receiveObject(fibEntry->fwdStrategy, egressId,
- objectMessage, rtt);
+ objectMessage, pitEntryCreation, objReception);
}
#ifdef WITH_POLICY
diff --git a/hicn-light/src/hicn/processor/fibEntry.h b/hicn-light/src/hicn/processor/fibEntry.h
index 7ec771b4c..1bd917bc2 100644
--- a/hicn-light/src/hicn/processor/fibEntry.h
+++ b/hicn-light/src/hicn/processor/fibEntry.h
@@ -110,7 +110,9 @@ void fibEntry_ReceiveObjectMessage(FibEntry *fibEntry,
void fibEntry_ReceiveObjectMessage(const FibEntry *fibEntry,
#endif /* WITH_POLICY */
const NumberSet *egressId,
- const Message *objectMessage, Ticks rtt);
+ const Message *objectMessage,
+ Ticks pitEntryCreation,
+ Ticks objReception);
#ifdef WITH_POLICY
policy_t fibEntry_GetPolicy(const FibEntry *fibEntry);
@@ -125,16 +127,10 @@ void fibEntry_OnTimeout(FibEntry *fibEntry, const NumberSet *egressId);
const NumberSet *fibEntry_GetNexthopsFromForwardingStrategy(
FibEntry *fibEntry, const Message *interestMessage, bool is_retransmission);
-void fibEntry_ReceiveObjectMessage(FibEntry *fibEntry,
- const NumberSet *egressId,
- const Message *objectMessage, Ticks rtt);
#else
void fibEntry_OnTimeout(const FibEntry *fibEntry, const NumberSet *egressId);
const NumberSet *fibEntry_GetNexthopsFromForwardingStrategy(
const FibEntry *fibEntry, const Message *interestMessage);
-void fibEntry_ReceiveObjectMessage(const FibEntry *fibEntry,
- const NumberSet *egressId,
- const Message *objectMessage, Ticks rtt);
#endif /* WITH_POLICY */
diff --git a/hicn-light/src/hicn/processor/messageProcessor.c b/hicn-light/src/hicn/processor/messageProcessor.c
index c989f8cb6..e38a3d558 100644
--- a/hicn-light/src/hicn/processor/messageProcessor.c
+++ b/hicn-light/src/hicn/processor/messageProcessor.c
@@ -34,9 +34,8 @@
#include <hicn/content_store/contentStoreLRU.h>
#include <hicn/strategies/loadBalancer.h>
-#include <hicn/strategies/loadBalancerWithPD.h>
+#include <hicn/strategies/lowLatency.h>
#include <hicn/strategies/rnd.h>
-#include <hicn/strategies/rndSegment.h>
#include <hicn/strategies/strategyImpl.h>
#include <hicn/io/streamConnection.h>
@@ -48,6 +47,7 @@
#include <hicn/utils/utils.h>
#include <hicn/utils/address.h>
+#include <hicn/core/messageHandler.h>
#ifdef WITH_POLICY
#define STATS_INTERVAL 1000 /* ms */
@@ -160,7 +160,7 @@ MessageProcessor *messageProcessor_Create(Forwarder *forwarder) {
processor->logger = logger_Acquire(forwarder_GetLogger(forwarder));
processor->pit = pitStandard_Create(forwarder);
- processor->fib = fib_Create();
+ processor->fib = fib_Create(forwarder);
if (logger_IsLoggable(processor->logger, LoggerFacility_Processor,
PARCLogLevel_Debug)) {
@@ -304,18 +304,13 @@ bool messageProcessor_AddOrUpdateRoute(MessageProcessor *processor,
control->addressType, &control->address, &control->len);
strategy_type fwdStrategy =
configuration_GetForwardingStrategy(config, prefixStr);
- if (fwdStrategy == LAST_STRATEGY_VALUE) {
- fwdStrategy = SET_STRATEGY_LOADBALANCER;
- }
Name *prefix = name_CreateFromAddress(control->addressType, control->address,
control->len);
FibEntry *entry = fib_Contains(processor->fib, prefix);
- bool newEntry = false;
if (entry != NULL) {
fibEntry_AddNexthop(entry, ifidx);
} else {
- newEntry = true;
#ifdef WITH_POLICY
entry = fibEntry_Create(prefix, fwdStrategy, processor->forwarder);
#else
@@ -328,14 +323,6 @@ bool messageProcessor_AddOrUpdateRoute(MessageProcessor *processor,
free(prefixStr);
name_Release(&prefix);
- /* For policy implementation, we need access to the ConnectionTable in all
- * Forwarding Strategies, so it is setup during FIB Entry creation */
- if (newEntry && (fwdStrategy == SET_STRATEGY_LOADBALANCER_WITH_DELAY)) {
- strategyLoadBalancerWithPD_SetConnectionTable(
- fibEntry_GetFwdStrategy(entry),
- forwarder_GetConnectionTable(processor->forwarder));
- }
-
return true;
}
@@ -365,9 +352,6 @@ bool messageProcessor_AddOrUpdatePolicy(MessageProcessor *processor,
if (!entry) {
strategy_type fwdStrategy =
configuration_GetForwardingStrategy(config, prefixStr);
- if (fwdStrategy == LAST_STRATEGY_VALUE) {
- fwdStrategy = SET_STRATEGY_LOADBALANCER;
- }
entry = fibEntry_Create(prefix, fwdStrategy, processor->forwarder);
fib_Add(processor->fib, entry);
}
@@ -407,11 +391,6 @@ void processor_SetStrategy(MessageProcessor *processor, Name *prefix,
FibEntry *entry = fib_Contains(processor->fib, prefix);
if (entry != NULL) {
fibEntry_SetStrategy(entry, strategy);
- if (strategy == SET_STRATEGY_LOADBALANCER_WITH_DELAY) {
- strategyLoadBalancerWithPD_SetConnectionTable(
- fibEntry_GetFwdStrategy(entry),
- forwarder_GetConnectionTable(processor->forwarder));
- }
}
}
@@ -572,6 +551,34 @@ static bool messageProcessor_ForwardViaFib(MessageProcessor *processor,
return false;
}
+ if(messageHandler_IsAProbe(message_FixedHeader(interestMessage))){
+ bool reply_to_probe = false;
+ ConnectionTable * ct = forwarder_GetConnectionTable(processor->forwarder);
+ const NumberSet * nexthops = fibEntry_GetNexthops(fibEntry);
+ unsigned size = (unsigned) numberSet_Length(nexthops);
+
+ for (unsigned i = 0; i < size; i++) {
+ unsigned nhop = numberSet_GetItem(nexthops, i);
+ Connection *conn =
+ (Connection *)connectionTable_FindById(ct, nhop);
+ if (!conn)
+ continue;
+ bool isLocal = connection_IsLocal(conn);
+ if(isLocal){
+ Connection * replyConn =
+ (Connection *)connectionTable_FindById(ct,
+ message_GetIngressConnectionId(interestMessage));
+ connection_HandleProbe(replyConn,
+ (uint8_t *) message_FixedHeader(interestMessage));
+ reply_to_probe = true;
+ break;
+ }
+ }
+ if(reply_to_probe)
+ return false;
+ }
+
+
PitEntry *pitEntry = pit_GetPitEntry(processor->pit, interestMessage);
if (pitEntry == NULL) {
return false;
@@ -709,6 +716,20 @@ static void messageProcessor_ReceiveContentObject(MessageProcessor *processor,
(void *)message, processor->stats.countDroppedNoReversePath);
}
+ //if the packet is a probe we need to analyze it
+ if(messageHandler_IsAProbe(message_FixedHeader(message))){
+ FibEntry *fibEntry = fib_MatchMessage(processor->fib, message);
+ if(fibEntry &&
+ fibEntry_GetFwdStrategyType(fibEntry) == SET_STRATEGY_LOW_LATENCY){
+ unsigned connid = message_GetIngressConnectionId(message);
+ NumberSet *outFace = numberSet_Create();
+ numberSet_Add(outFace, connid);
+ fibEntry_ReceiveObjectMessage(fibEntry, outFace, message, 0,
+ forwarder_GetTicks(processor->forwarder));
+ numberSet_Release(&(outFace));
+ }
+ }
+
// we store the packets in the content store enven in the case where there
// is no match in the PIT table in this way the applications can push the
// content in the CS of the forwarder. We allow this only for local faces
diff --git a/hicn-light/src/hicn/processor/pitStandard.c b/hicn-light/src/hicn/processor/pitStandard.c
index edf0b5e98..d4961cdba 100644
--- a/hicn-light/src/hicn/processor/pitStandard.c
+++ b/hicn-light/src/hicn/processor/pitStandard.c
@@ -159,7 +159,6 @@ static PITVerdict _pitStandard_ReceiveInterest(PIT *generic,
") and reverse path, forwarding",
(void *)interestMessage, pitEntry_GetExpiryTime(pitEntry));
}
-
#ifdef WITH_POLICY
return PITVerdict_Retransmit;
#else
@@ -215,12 +214,10 @@ static NumberSet *_pitStandard_SatisfyInterest(PIT *generic,
// PIT entry is not expired, use it
FibEntry *fibEntry = pitEntry_GetFibEntry(pitEntry);
if (fibEntry != NULL) {
- // this is a rough estimation of the residual RTT
- Ticks rtt = forwarder_GetTicks(pit->forwarder) -
- pitEntry_GetCreationTime(pitEntry);
fibEntry_ReceiveObjectMessage(fibEntry, pitEntry_GetEgressSet(pitEntry),
objectMessage,
- rtt); // need to implement RTT
+ forwarder_GetTicks(pit->forwarder),
+ pitEntry_GetCreationTime(pitEntry));
}
const NumberSet *is = pitEntry_GetIngressSet(pitEntry);
numberSet_AddSet(ingressSet, is); // with this we do a copy so we can
diff --git a/hicn-light/src/hicn/strategies/CMakeLists.txt b/hicn-light/src/hicn/strategies/CMakeLists.txt
index 7f0730b2f..400efcde9 100644
--- a/hicn-light/src/hicn/strategies/CMakeLists.txt
+++ b/hicn-light/src/hicn/strategies/CMakeLists.txt
@@ -16,20 +16,18 @@ cmake_minimum_required(VERSION 3.5 FATAL_ERROR)
list(APPEND HEADER_FILES
${CMAKE_CURRENT_SOURCE_DIR}/strategyImpl.h
${CMAKE_CURRENT_SOURCE_DIR}/loadBalancer.h
- ${CMAKE_CURRENT_SOURCE_DIR}/loadBalancerWithPD.h
+ ${CMAKE_CURRENT_SOURCE_DIR}/lowLatency.h
${CMAKE_CURRENT_SOURCE_DIR}/nexthopState.h
- ${CMAKE_CURRENT_SOURCE_DIR}/nexthopStateWithPD.h
+ ${CMAKE_CURRENT_SOURCE_DIR}/nexthopStateLowLatency.h
${CMAKE_CURRENT_SOURCE_DIR}/rnd.h
- ${CMAKE_CURRENT_SOURCE_DIR}/rndSegment.h
)
list(APPEND SOURCE_FILES
${CMAKE_CURRENT_SOURCE_DIR}/loadBalancer.c
- ${CMAKE_CURRENT_SOURCE_DIR}/loadBalancerWithPD.c
+ ${CMAKE_CURRENT_SOURCE_DIR}/lowLatency.c
${CMAKE_CURRENT_SOURCE_DIR}/nexthopState.c
- ${CMAKE_CURRENT_SOURCE_DIR}/nexthopStateWithPD.c
+ ${CMAKE_CURRENT_SOURCE_DIR}/nexthopStateLowLatency.c
${CMAKE_CURRENT_SOURCE_DIR}/rnd.c
- ${CMAKE_CURRENT_SOURCE_DIR}/rndSegment.c
)
set(SOURCE_FILES ${SOURCE_FILES} PARENT_SCOPE)
diff --git a/hicn-light/src/hicn/strategies/loadBalancer.c b/hicn-light/src/hicn/strategies/loadBalancer.c
index 35d64e763..878a58515 100644
--- a/hicn-light/src/hicn/strategies/loadBalancer.c
+++ b/hicn-light/src/hicn/strategies/loadBalancer.c
@@ -32,7 +32,8 @@
static void _strategyLoadBalancer_ReceiveObject(StrategyImpl *strategy,
const NumberSet *egressId,
const Message *objectMessage,
- Ticks rtt);
+ Ticks pitEntryCreation,
+ Ticks objReception);
static void _strategyLoadBalancer_OnTimeout(StrategyImpl *strategy,
const NumberSet *egressId);
static NumberSet *_strategyLoadBalancer_LookupNexthop(
@@ -161,7 +162,8 @@ static unsigned _select_Nexthop(StrategyLoadBalancer *strategy) {
static void _strategyLoadBalancer_ReceiveObject(StrategyImpl *strategy,
const NumberSet *egressId,
const Message *objectMessage,
- Ticks rtt) {
+ Ticks pitEntryCreation,
+ Ticks objReception) {
_strategyLoadBalancer_OnTimeout(strategy, egressId);
}
diff --git a/hicn-light/src/hicn/strategies/loadBalancerWithPD.c b/hicn-light/src/hicn/strategies/loadBalancerWithPD.c
deleted file mode 100644
index dac759053..000000000
--- a/hicn-light/src/hicn/strategies/loadBalancerWithPD.c
+++ /dev/null
@@ -1,468 +0,0 @@
-/*
- * Copyright (c) 2017-2019 Cisco and/or its affiliates.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at:
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <limits.h>
-#include <hicn/hicn-light/config.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <time.h>
-
-#include <parc/assert/parc_Assert.h>
-
-#include <parc/algol/parc_HashMap.h>
-#include <parc/algol/parc_Memory.h>
-#include <parc/algol/parc_Object.h>
-#include <parc/algol/parc_Unsigned.h>
-
-#include <hicn/strategies/loadBalancerWithPD.h>
-#include <hicn/strategies/nexthopStateWithPD.h>
-
-const unsigned PROBE_FREQUENCY = 1024;
-
-static void _strategyLoadBalancerWithPD_ReceiveObject(
- StrategyImpl *strategy, const NumberSet *egressId,
- const Message *objectMessage, Ticks rtt);
-static void _strategyLoadBalancerWithPD_OnTimeout(StrategyImpl *strategy,
- const NumberSet *egressId);
-static NumberSet *_strategyLoadBalancerWithPD_LookupNexthop(
- StrategyImpl *strategy,
-#ifdef WITH_POLICY
- NumberSet * nexthops,
-#endif
- const Message *interestMessage);
-#ifndef WITH_POLICY
-static NumberSet *_strategyLoadBalancerWithPD_ReturnNexthops(
- StrategyImpl *strategy);
-static unsigned _strategyLoadBalancerWithPD_CountNexthops(
- StrategyImpl *strategy);
-#endif /* ! WITH_POLICY */
-static void _strategyLoadBalancerWithPD_AddNexthop(StrategyImpl *strategy,
- unsigned connectionId);
-static void _strategyLoadBalancerWithPD_RemoveNexthop(StrategyImpl *strategy,
- unsigned connectionId);
-static void _strategyLoadBalancerWithPD_ImplDestroy(StrategyImpl **strategyPtr);
-static strategy_type _strategyLoadBalancerWithPD_GetStrategy(
- StrategyImpl *strategy);
-
-static StrategyImpl _template = {
- .context = NULL,
- .receiveObject = &_strategyLoadBalancerWithPD_ReceiveObject,
- .onTimeout = &_strategyLoadBalancerWithPD_OnTimeout,
- .lookupNexthop = &_strategyLoadBalancerWithPD_LookupNexthop,
-#ifndef WITH_POLICY
- .returnNexthops = &_strategyLoadBalancerWithPD_ReturnNexthops,
- .countNexthops = &_strategyLoadBalancerWithPD_CountNexthops,
-#endif /* ! WITH_POLICY */
- .addNexthop = &_strategyLoadBalancerWithPD_AddNexthop,
- .removeNexthop = &_strategyLoadBalancerWithPD_RemoveNexthop,
- .destroy = &_strategyLoadBalancerWithPD_ImplDestroy,
- .getStrategy = &_strategyLoadBalancerWithPD_GetStrategy,
-};
-
-struct strategy_load_balancer_with_pd;
-typedef struct strategy_load_balancer_with_pd StrategyLoadBalancerWithPD;
-
-struct strategy_load_balancer_with_pd {
- double weights_sum;
- unsigned min_delay;
- // hash map from connectionId to StrategyNexthopState
- PARCHashMap *strategy_state;
-#ifndef WITH_POLICY
- NumberSet *nexthops;
-#endif /* ! WITH_POLICY */
- const ConnectionTable *connTable;
- bool toInit;
- unsigned int fwdPackets;
-};
-
-StrategyImpl *strategyLoadBalancerWithPD_Create() {
- StrategyLoadBalancerWithPD *strategy =
- parcMemory_AllocateAndClear(sizeof(StrategyLoadBalancerWithPD));
- parcAssertNotNull(strategy, "parcMemory_AllocateAndClear(%zu) returned NULL",
- sizeof(StrategyLoadBalancerWithPD));
-
- strategy->weights_sum = 0.0;
- strategy->min_delay = INT_MAX;
- strategy->strategy_state = parcHashMap_Create();
-#ifndef WITH_POLICY
- strategy->nexthops = numberSet_Create();
-#endif /* ! WITH_POLICY */
- srand((unsigned int)time(NULL));
-
- StrategyImpl *impl = parcMemory_AllocateAndClear(sizeof(StrategyImpl));
- parcAssertNotNull(impl, "parcMemory_AllocateAndClear(%zu) returned NULL",
- sizeof(StrategyImpl));
- memcpy(impl, &_template, sizeof(StrategyImpl));
- impl->context = strategy;
- strategy->connTable = NULL;
- strategy->fwdPackets = 0;
- strategy->toInit = true;
-
- return impl;
-}
-
-void strategyLoadBalancerWithPD_SetConnectionTable(StrategyImpl *strategy,
- ConnectionTable *connTable) {
- StrategyLoadBalancerWithPD *lb =
- (StrategyLoadBalancerWithPD *)strategy->context;
- lb->connTable = connTable;
-}
-
-// =======================================================
-// Dispatch API
-
-strategy_type _strategyLoadBalancerWithPD_GetStrategy(StrategyImpl *strategy) {
- return SET_STRATEGY_LOADBALANCER_WITH_DELAY;
-}
-
-static void _update_Stats(StrategyLoadBalancerWithPD *strategy,
- StrategyNexthopStateWithPD *state, bool inc,
- Ticks rtt) {
- const double ALPHA = 0.9;
- double w = strategyNexthopStateWithPD_GetWeight(state);
- strategy->weights_sum -= w;
- w = strategyNexthopStateWithPD_UpdateState(state, inc, strategy->min_delay,
- ALPHA);
- strategy->weights_sum += w;
-}
-
-#ifdef WITH_POLICY
-static void _sendProbes(StrategyLoadBalancerWithPD *strategy, NumberSet * nexthops) {
- unsigned size = (unsigned)numberSet_Length(nexthops);
- for (unsigned i = 0; i < size; i++) {
- unsigned nhop = numberSet_GetItem(nexthops, i);
- Connection *conn =
- (Connection *)connectionTable_FindById(strategy->connTable, nhop);
- if (!conn)
- continue;
-
- connection_Probe(conn);
- unsigned delay = (unsigned)connection_GetDelay(conn);
- PARCUnsigned *cid = parcUnsigned_Create(nhop);
- StrategyNexthopStateWithPD *elem =
- (StrategyNexthopStateWithPD *)parcHashMap_Get(
- strategy->strategy_state, cid);
- strategyNexthopStateWithPD_SetDelay(elem, delay);
- if (delay < strategy->min_delay && delay != 0) {
- strategy->min_delay = delay;
- }
-
- parcUnsigned_Release(&cid);
- }
-}
-#else
-static void _sendProbes(StrategyLoadBalancerWithPD *strategy) {
- unsigned size = (unsigned)numberSet_Length(strategy->nexthops);
- for (unsigned i = 0; i < size; i++) {
- unsigned nhop = numberSet_GetItem(strategy->nexthops, i);
- Connection *conn =
- (Connection *)connectionTable_FindById(strategy->connTable, nhop);
- if (conn != NULL) {
- connection_Probe(conn);
- unsigned delay = (unsigned)connection_GetDelay(conn);
- PARCUnsigned *cid = parcUnsigned_Create(nhop);
- StrategyNexthopStateWithPD *elem =
- (StrategyNexthopStateWithPD *)parcHashMap_Get(
- strategy->strategy_state, cid);
- strategyNexthopStateWithPD_SetDelay(elem, delay);
- if (delay < strategy->min_delay && delay != 0) {
- strategy->min_delay = delay;
- }
-
- parcUnsigned_Release(&cid);
- }
- }
-}
-#endif /* WITH_POLICY */
-
-#ifdef WITH_POLICY
-static unsigned _select_Nexthop(StrategyLoadBalancerWithPD *strategy, NumberSet * nexthops) {
- strategy->fwdPackets++;
- if (strategy->toInit || strategy->fwdPackets == PROBE_FREQUENCY) {
- strategy->toInit = false;
- strategy->fwdPackets = 0;
- _sendProbes(strategy, nexthops);
- }
- double rnd = (double)rand() / (double)RAND_MAX;
- double start_range = 0.0;
-
- PARCIterator *it = parcHashMap_CreateKeyIterator(strategy->strategy_state);
-
- unsigned nexthop = 100000;
- while (parcIterator_HasNext(it)) {
- PARCUnsigned *cid = parcIterator_Next(it);
- const StrategyNexthopStateWithPD *elem =
- parcHashMap_Get(strategy->strategy_state, cid);
-
- double w = strategyNexthopStateWithPD_GetWeight(elem);
-
- // printf("next = %u .. pi %u avgpi %f w %f avgrtt
- // %f\n",parcUnsigned_GetUnsigned(cid),
- // strategyNexthopStateWithPD_GetPI(elem),
- // strategyNexthopStateWithPD_GetWeight(elem),
- // strategyNexthopStateWithPD_GetWeight(elem),
- // strategyNexthopStateWithPD_GetAvgRTT(elem));
-
- double prob = w / strategy->weights_sum;
- if ((rnd >= start_range) && (rnd < (start_range + prob))) {
- nexthop = parcUnsigned_GetUnsigned(cid);
- break;
- } else {
- start_range += prob;
- }
- }
-
- parcIterator_Release(&it);
-
- // if no face is selected by the algorithm (for example because of a wrong
- // round in the weights) we may always select the last face here. Double check
- // this!
- return nexthop;
-}
-#else
-static unsigned _select_Nexthop(StrategyLoadBalancerWithPD *strategy) {
- strategy->fwdPackets++;
- if (strategy->toInit || strategy->fwdPackets == PROBE_FREQUENCY) {
- strategy->toInit = false;
- strategy->fwdPackets = 0;
- _sendProbes(strategy);
- }
- double rnd = (double)rand() / (double)RAND_MAX;
- double start_range = 0.0;
-
- PARCIterator *it = parcHashMap_CreateKeyIterator(strategy->strategy_state);
-
- unsigned nexthop = 100000;
- while (parcIterator_HasNext(it)) {
- PARCUnsigned *cid = parcIterator_Next(it);
- const StrategyNexthopStateWithPD *elem =
- parcHashMap_Get(strategy->strategy_state, cid);
-
- double w = strategyNexthopStateWithPD_GetWeight(elem);
-
- // printf("next = %u .. pi %u avgpi %f w %f avgrtt
- // %f\n",parcUnsigned_GetUnsigned(cid),
- // strategyNexthopStateWithPD_GetPI(elem),
- // strategyNexthopStateWithPD_GetWeight(elem),
- // strategyNexthopStateWithPD_GetWeight(elem),
- // strategyNexthopStateWithPD_GetAvgRTT(elem));
-
- double prob = w / strategy->weights_sum;
- if ((rnd >= start_range) && (rnd < (start_range + prob))) {
- nexthop = parcUnsigned_GetUnsigned(cid);
- break;
- } else {
- start_range += prob;
- }
- }
-
- parcIterator_Release(&it);
-
- // if no face is selected by the algorithm (for example because of a wrong
- // round in the weights) we may always select the last face here. Double check
- // this!
- return nexthop;
-}
-#endif /* WITH_POLICY */
-
-static void _strategyLoadBalancerWithPD_ReceiveObject(
- StrategyImpl *strategy, const NumberSet *egressId,
- const Message *objectMessage, Ticks rtt) {
- StrategyLoadBalancerWithPD *lb =
- (StrategyLoadBalancerWithPD *)strategy->context;
-
- for (unsigned i = 0; i < numberSet_Length(egressId); i++) {
- unsigned outId = numberSet_GetItem(egressId, i);
- PARCUnsigned *cid = parcUnsigned_Create(outId);
-
- const StrategyNexthopStateWithPD *state =
- parcHashMap_Get(lb->strategy_state, cid);
- if (state != NULL) {
- _update_Stats(lb, (StrategyNexthopStateWithPD *)state, false, 0);
- } else {
- // this may happen if we remove a face/route while downloading a file
- // we should ignore this timeout
- }
- parcUnsigned_Release(&cid);
- }
-}
-
-static void _strategyLoadBalancerWithPD_OnTimeout(StrategyImpl *strategy,
- const NumberSet *egressId) {
- StrategyLoadBalancerWithPD *lb =
- (StrategyLoadBalancerWithPD *)strategy->context;
-
- for (unsigned i = 0; i < numberSet_Length(egressId); i++) {
- unsigned outId = numberSet_GetItem(egressId, i);
- PARCUnsigned *cid = parcUnsigned_Create(outId);
-
- const StrategyNexthopStateWithPD *state =
- parcHashMap_Get(lb->strategy_state, cid);
- if (state != NULL) {
- _update_Stats(lb, (StrategyNexthopStateWithPD *)state, false, 0);
- } else {
- // this may happen if we remove a face/route while downloading a file
- // we should ignore this timeout
- }
- parcUnsigned_Release(&cid);
- }
-}
-
-// ATTENTION!! This interface force us to create a NumberSet which need to be
-// delited somewhere The specification in the interface requires that this
-// function never returns NULL. in case we have no output face we need to return
-// an empty NumberSet
-static NumberSet *_strategyLoadBalancerWithPD_LookupNexthop(
- StrategyImpl *strategy,
-#ifdef WITH_POLICY
- NumberSet * nexthops,
-#endif
- const Message *interestMessage) {
- StrategyLoadBalancerWithPD *lb =
- (StrategyLoadBalancerWithPD *)strategy->context;
-
- unsigned in_connection = message_GetIngressConnectionId(interestMessage);
- PARCUnsigned *in = parcUnsigned_Create(in_connection);
-
- unsigned mapSize = (unsigned)parcHashMap_Size(lb->strategy_state);
- NumberSet *outList = numberSet_Create();
-
- if ((mapSize == 0) ||
- ((mapSize == 1) && parcHashMap_Contains(lb->strategy_state, in))) {
- // there are no output faces or the input face is also the only output face.
- // return null to avoid loops
- parcUnsigned_Release(&in);
- return outList;
- }
-
- unsigned out_connection;
- do {
-#ifdef WITH_POLICY
- out_connection = _select_Nexthop(lb, nexthops);
-#else
- out_connection = _select_Nexthop(lb);
-#endif /* WITH_POLICY */
- } while (out_connection == in_connection);
-
- PARCUnsigned *out = parcUnsigned_Create(out_connection);
-
- const StrategyNexthopStateWithPD *state =
- parcHashMap_Get(lb->strategy_state, out);
- if (state == NULL) {
- // this is an error and should not happen!
- parcTrapNotImplemented(
- "Try to send an interest on a face that does not exists");
- }
-
- _update_Stats(lb, (StrategyNexthopStateWithPD *)state, true, 0);
-
- parcUnsigned_Release(&in);
- parcUnsigned_Release(&out);
-
- numberSet_Add(outList, out_connection);
- return outList;
-}
-
-#ifndef WITH_POLICY
-static NumberSet *_strategyLoadBalancerWithPD_ReturnNexthops(
- StrategyImpl *strategy) {
- StrategyLoadBalancerWithPD *lb =
- (StrategyLoadBalancerWithPD *)strategy->context;
- return lb->nexthops;
-}
-
-unsigned _strategyLoadBalancerWithPD_CountNexthops(StrategyImpl *strategy) {
- StrategyLoadBalancerWithPD *lb =
- (StrategyLoadBalancerWithPD *)strategy->context;
- return (unsigned)numberSet_Length(lb->nexthops);
-}
-#endif /* WITH_POLICY */
-
-static void _strategyLoadBalancerWithPD_resetState(StrategyImpl *strategy) {
- StrategyLoadBalancerWithPD *lb =
- (StrategyLoadBalancerWithPD *)strategy->context;
- lb->weights_sum = 0.0;
- lb->min_delay = INT_MAX;
- lb->toInit = true;
- PARCIterator *it = parcHashMap_CreateKeyIterator(lb->strategy_state);
-
- while (parcIterator_HasNext(it)) {
- PARCUnsigned *cid = parcIterator_Next(it);
- StrategyNexthopStateWithPD *elem =
- (StrategyNexthopStateWithPD *)parcHashMap_Get(lb->strategy_state, cid);
-
- strategyNexthopStateWithPD_Reset(elem);
- lb->weights_sum += strategyNexthopStateWithPD_GetWeight(elem);
- }
-
- parcIterator_Release(&it);
-}
-
-static void _strategyLoadBalancerWithPD_AddNexthop(StrategyImpl *strategy,
- unsigned connectionId) {
- StrategyNexthopStateWithPD *state = strategyNexthopStateWithPD_Create();
-
- PARCUnsigned *cid = parcUnsigned_Create(connectionId);
-
- StrategyLoadBalancerWithPD *lb =
- (StrategyLoadBalancerWithPD *)strategy->context;
-
- if (!parcHashMap_Contains(lb->strategy_state, cid)) {
- parcHashMap_Put(lb->strategy_state, cid, state);
-#ifndef WITH_POLICY
- numberSet_Add(lb->nexthops, connectionId);
-#endif /* ! WITH_POLICY */
- _strategyLoadBalancerWithPD_resetState(strategy);
- }
-}
-
-static void _strategyLoadBalancerWithPD_RemoveNexthop(StrategyImpl *strategy,
- unsigned connectionId) {
- StrategyLoadBalancerWithPD *lb =
- (StrategyLoadBalancerWithPD *)strategy->context;
-
- PARCUnsigned *cid = parcUnsigned_Create(connectionId);
-
- if (parcHashMap_Contains(lb->strategy_state, cid)) {
- parcHashMap_Remove(lb->strategy_state, cid);
-#ifndef WITH_POLICY
- numberSet_Remove(lb->nexthops, connectionId);
-#endif /* ! WITH_POLICY */
- _strategyLoadBalancerWithPD_resetState(strategy);
- }
-
- parcUnsigned_Release(&cid);
-}
-
-static void _strategyLoadBalancerWithPD_ImplDestroy(
- StrategyImpl **strategyPtr) {
- parcAssertNotNull(strategyPtr, "Parameter must be non-null double pointer");
- parcAssertNotNull(*strategyPtr,
- "Parameter must dereference to non-null pointer");
-
- StrategyImpl *impl = *strategyPtr;
- StrategyLoadBalancerWithPD *strategy =
- (StrategyLoadBalancerWithPD *)impl->context;
-
- parcHashMap_Release(&(strategy->strategy_state));
-#ifndef WITH_POLICY
- numberSet_Release(&(strategy->nexthops));
-#endif /* ! WITH_POLICY */
-
- parcMemory_Deallocate((void **)&strategy);
- parcMemory_Deallocate((void **)&impl);
- *strategyPtr = NULL;
-}
diff --git a/hicn-light/src/hicn/strategies/loadBalancerWithPD.h b/hicn-light/src/hicn/strategies/loadBalancerWithPD.h
deleted file mode 100644
index a6ad94ab8..000000000
--- a/hicn-light/src/hicn/strategies/loadBalancerWithPD.h
+++ /dev/null
@@ -1,31 +0,0 @@
-/*
- * Copyright (c) 2017-2019 Cisco and/or its affiliates.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at:
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-/**
- * Forward on the less loaded path taking into account the propagation delay of
- * the first hop
- */
-
-#ifndef loadBalancerWithPD_h
-#define loadBalancerWithPD_h
-
-#include <hicn/strategies/strategyImpl.h>
-#include <hicn/core/connectionTable.h>
-
-StrategyImpl *strategyLoadBalancerWithPD_Create();
-
-void strategyLoadBalancerWithPD_SetConnectionTable(StrategyImpl *strategy,
- ConnectionTable *connTable);
-#endif // loadBalancerWithPD_h
diff --git a/hicn-light/src/hicn/strategies/lowLatency.c b/hicn-light/src/hicn/strategies/lowLatency.c
new file mode 100644
index 000000000..a96b7b0af
--- /dev/null
+++ b/hicn-light/src/hicn/strategies/lowLatency.c
@@ -0,0 +1,765 @@
+/*
+ * Copyright (c) 2017-2019 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <hicn/hicn-light/config.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <math.h>
+
+#include <parc/assert/parc_Assert.h>
+
+#include <parc/algol/parc_HashMap.h>
+#include <parc/algol/parc_Memory.h>
+#include <parc/algol/parc_Object.h>
+#include <parc/algol/parc_Unsigned.h>
+
+#include <hicn/core/messageHandler.h>
+
+#include <hicn/strategies/lowLatency.h>
+#include <hicn/strategies/nexthopStateLowLatency.h>
+#include <hicn/processor/fibEntry.h>
+
+const unsigned STABILITY_FACTOR = 15;
+const unsigned MAX_SWITCH_TRY = 10;
+const unsigned MAX_LATENCY_DIFF = 10;
+const unsigned MAX_TOLLERATED_LATENCY_DIFF = 15;
+const unsigned MAX_ROUNDS_MP_WITHOUT_CHECK = 2;
+const unsigned MAX_ROUNDS_AVOIDING_MULTIPATH = 40; //about 20 sec
+const unsigned MAX_ROUNDS_WITH_ERROR = 4;
+const unsigned PROBE_LIFETIME = 500; //ms
+
+static void _strategyLowLatency_ReceiveObject(StrategyImpl *strategy,
+ const NumberSet *egressId,
+ const Message *objectMessage,
+ Ticks pitEntryCreation,
+ Ticks objReception);
+static void _strategyLowLatency_OnTimeout(StrategyImpl *strategy,
+ const NumberSet *egressId);
+static NumberSet *_strategyLowLatency_LookupNexthop(
+ StrategyImpl *strategy,
+#ifdef WITH_POLICY
+ NumberSet * nexthops,
+#endif /* WITH_POLICY */
+ const Message *interestMessage);
+#ifndef WITH_POLICY
+static NumberSet *_strategyLowLatency_ReturnNexthops(StrategyImpl *strategy);
+static unsigned _strategyLowLatency_CountNexthops(StrategyImpl *strategy);
+#endif /* ! WITH_POLICY */
+static void _strategyLowLatency_AddNexthop(StrategyImpl *strategy,
+ unsigned connectionId);
+static void _strategyLowLatency_RemoveNexthop(StrategyImpl *strategy,
+ unsigned connectionId);
+static void _strategyLowLatency_ImplDestroy(StrategyImpl **strategyPtr);
+static strategy_type _strategyLowLatency_GetStrategy(StrategyImpl *strategy);
+
+static StrategyImpl _template = {
+ .context = NULL,
+ .receiveObject = &_strategyLowLatency_ReceiveObject,
+ .onTimeout = &_strategyLowLatency_OnTimeout,
+ .lookupNexthop = &_strategyLowLatency_LookupNexthop,
+#ifndef WITH_POLICY
+ .returnNexthops = &_strategyLowLatency_ReturnNexthops,
+ .countNexthops = &_strategyLowLatency_CountNexthops,
+#endif /* ! WITH_POLICY */
+ .addNexthop = &_strategyLowLatency_AddNexthop,
+ .removeNexthop = &_strategyLowLatency_RemoveNexthop,
+ .destroy = &_strategyLowLatency_ImplDestroy,
+ .getStrategy = &_strategyLowLatency_GetStrategy,
+};
+
+struct strategy_low_latency;
+typedef struct strategy_low_latency StrategyLowLatency;
+
+struct strategy_low_latency {
+ // hash map from connectionId to StrategyNexthopStateLL
+ PARCHashMap *strategy_state;
+ //hash map from sequence number to ticks (sent time)
+ PARCHashMap *pending_probes_ticks;
+ //hash map from sequence number to face id
+ PARCHashMap *pending_probes_faces;
+ const Forwarder * forwarder;
+ const FibEntry * fibEntry;
+ PARCEventTimer *sendProbes;
+ PARCEventTimer *computeBestFace;
+ uint8_t * probe;
+ hicn_name_t * name;
+ StrategyNexthopStateLL * bestFaces[2];
+ unsigned round;
+ unsigned rounds_in_multipath;
+ unsigned rounds_with_error;
+ unsigned rounds_avoiding_multipath;
+ bool use2paths;
+ bool avoid_multipath;
+#ifndef WITH_POLICY
+ NumberSet *nexthops;
+#endif /* ! WITH_POLICY */
+};
+
+static void strategyLowLatency_SendProbesCB(int fd, PARCEventType which_event,
+ void *data){
+ parcAssertTrue(which_event & PARCEventType_Timeout,
+ "Event incorrect, expecting %X set, got %X",
+ PARCEventType_Timeout, which_event);
+
+ StrategyLowLatency *ll = (StrategyLowLatency *) data;
+
+ //delete old pending probes
+ if(parcHashMap_Size(ll->pending_probes_ticks) != 0){
+ Ticks now = forwarder_GetTicks(ll->forwarder);
+ PARCIterator *iterator = parcHashMap_CreateKeyIterator(ll->pending_probes_ticks);
+ NumberSet *to_remove = numberSet_Create();
+ while(parcIterator_HasNext(iterator)) {
+ PARCUnsigned *parc_seq = (PARCUnsigned *) parcIterator_Next(iterator);
+ PARCUnsigned *parc_time = (PARCUnsigned *) parcHashMap_Get(ll->pending_probes_ticks, parc_seq);
+ Ticks sent_time = parcUnsigned_GetUnsigned(parc_time);
+ if((now - sent_time) > PROBE_LIFETIME){
+ //probes to delete
+ numberSet_Add(to_remove, parcUnsigned_GetUnsigned(parc_seq));
+ }
+ }
+ parcIterator_Release(&iterator);
+
+ for(int i = 0; i < numberSet_Length(to_remove); i++){
+ PARCUnsigned *prob_seq = parcUnsigned_Create(numberSet_GetItem(to_remove,i));
+ PARCUnsigned *cid = (PARCUnsigned *) parcHashMap_Get(ll->pending_probes_faces, prob_seq);
+ StrategyNexthopStateLL *state =
+ (StrategyNexthopStateLL *) parcHashMap_Get(ll->strategy_state, cid);
+ strategyNexthopStateLL_LostProbe(state);
+ parcHashMap_Remove(ll->pending_probes_ticks, prob_seq);
+ parcHashMap_Remove(ll->pending_probes_faces, prob_seq);
+ parcUnsigned_Release(&prob_seq);
+ }
+ numberSet_Release(&to_remove);
+ }
+
+ ConnectionTable * ct = forwarder_GetConnectionTable(ll->forwarder);
+
+ PARCIterator *iterator = parcHashMap_CreateKeyIterator(ll->strategy_state);
+ while(parcIterator_HasNext(iterator)){
+ PARCUnsigned *cid = (PARCUnsigned *) parcIterator_Next(iterator);
+ Connection *conn =
+ (Connection *)connectionTable_FindById(ct,
+ parcUnsigned_GetUnsigned(cid));
+ if(!conn)
+ continue;
+
+ StrategyNexthopStateLL *state =
+ (StrategyNexthopStateLL *) parcHashMap_Get(ll->strategy_state, cid);
+
+ //probe only usable paths
+ if(!strategyNexthopStateLL_IsAllowed(state))
+ continue;
+
+ uint32_t seq = rand();
+ messageHandler_SetProbeName(ll->probe, HF_INET6_TCP,
+ ll->name, seq);
+ connection_Probe(conn, ll->probe);
+
+ PARCUnsigned *parc_seq = parcUnsigned_Create(seq);
+ Ticks now = forwarder_GetTicks(ll->forwarder);
+ PARCUnsigned *parc_time = parcUnsigned_Create(now);
+ parcHashMap_Put(ll->pending_probes_ticks, parc_seq, parc_time);
+ parcHashMap_Put(ll->pending_probes_faces, parc_seq, cid);
+ strategyNexthopStateLL_SentProbe(state);
+ parcUnsigned_Release(&parc_seq);
+ parcUnsigned_Release(&parc_time);
+ }
+ parcIterator_Release(&iterator);
+
+ struct timeval timeout = {0,50000};
+ parcEventTimer_Start(ll->sendProbes, &timeout);
+}
+
+static void strategyLowLatency_SelectBestFaces(StrategyLowLatency *ll,
+ bool new_round){
+
+ if(new_round){
+ ll->round++;
+ }
+
+ if(parcHashMap_Size(ll->strategy_state) == 0){
+ ll->bestFaces[0] = NULL;
+ ll->bestFaces[1] = NULL;
+ ll->use2paths = false;
+ goto NEW_ROUND;
+ }
+
+ if(ll->use2paths && ll->bestFaces[0] != NULL && ll->bestFaces[1] != NULL){
+ //multipath case
+
+ if(!strategyNexthopStateLL_IsLossy(ll->bestFaces[0])
+ && !strategyNexthopStateLL_IsLossy(ll->bestFaces[1])
+ && strategyNexthopStateLL_IsAllowed(ll->bestFaces[0])
+ && strategyNexthopStateLL_IsAllowed(ll->bestFaces[1])){
+
+ if(ll->rounds_in_multipath < MAX_ROUNDS_MP_WITHOUT_CHECK){
+ //we are at the first rounds of the multipath let's wait a bit
+ //(MAX_ROUNDS_MP_WITHOUT_CHECK) to make the queuing converge
+ ll->rounds_in_multipath++;
+ goto NEW_ROUND;
+ }
+
+ //we need to decide if we want ot keep using two paths or not
+ ll->rounds_in_multipath++;
+ double rtt0 = strategyNexthopStateLL_GetRTTLive(ll->bestFaces[0]);
+ double rtt1 = strategyNexthopStateLL_GetRTTLive(ll->bestFaces[1]);
+ double diff = fabs(rtt0 - rtt1);
+
+ if(diff < MAX_LATENCY_DIFF){
+ //everything is working, keep using the two paths
+ ll->rounds_with_error = 0;
+ goto NEW_ROUND;
+ }
+
+ //check for how many rounds we had problems
+ if(ll->rounds_with_error < MAX_ROUNDS_WITH_ERROR &&
+ diff < MAX_TOLLERATED_LATENCY_DIFF){
+ //we can tollerate few round with errors
+ ll->rounds_with_error++;
+ goto NEW_ROUND;
+ }
+
+ //prevent the usage of multiple paths
+ ll->rounds_with_error = 0;
+ ll->avoid_multipath = true;
+ ll->rounds_avoiding_multipath = 0;
+ } //else
+ //at least one of the two path is lossy
+ //or it is not allowed by the policies.
+ //search for a better possibility
+ }
+
+ ll->bestFaces[0] = NULL;
+ ll->bestFaces[1] = NULL;
+
+ //check if there is at least one non lossy connection
+ PARCIterator *iterator = parcHashMap_CreateKeyIterator(ll->strategy_state);
+ bool check_losses = true;
+ bool found_good_face = false;
+ while(parcIterator_HasNext(iterator) && !found_good_face){
+ PARCUnsigned *cid = (PARCUnsigned *) parcIterator_Next(iterator);
+ const StrategyNexthopStateLL *state = parcHashMap_Get(ll->strategy_state, cid);
+ if(!strategyNexthopStateLL_IsLossy(state) &&
+ strategyNexthopStateLL_IsAllowed(state)){
+ found_good_face = true;
+ }
+ }
+ parcIterator_Release(&iterator);
+ if(!found_good_face){
+ // all the available faces are lossy, so we take into account only
+ // the latency computed with the probes
+ check_losses = false;
+ }
+
+ if(ll->bestFaces[0] == NULL){
+ //try to take a random face
+ PARCIterator *iterator = parcHashMap_CreateKeyIterator(ll->strategy_state);
+ bool face_found = false;
+ while(parcIterator_HasNext(iterator) && !face_found) {
+ PARCUnsigned *cid = (PARCUnsigned *) parcIterator_Next(iterator);
+ StrategyNexthopStateLL *state = (StrategyNexthopStateLL *)
+ parcHashMap_Get(ll->strategy_state, cid);
+
+ if((check_losses && strategyNexthopStateLL_IsLossy(state)) ||
+ !strategyNexthopStateLL_IsAllowed(state)){
+ //skip the face
+ continue;
+ }
+
+ ll->bestFaces[0] = state;
+ face_found = true;
+ }
+ parcIterator_Release(&iterator);
+ }
+
+ if(ll->bestFaces[0] == NULL){
+ //no usable face exists
+ ll->bestFaces[0] = NULL;
+ ll->bestFaces[1] = NULL;
+ ll->use2paths = false;
+ goto NEW_ROUND;
+ }
+
+ double bestRtt = strategyNexthopStateLL_GetRTTLive(ll->bestFaces[0]);
+
+ if(ll->avoid_multipath)
+ ll->rounds_avoiding_multipath++;
+
+ if(ll->rounds_avoiding_multipath > MAX_ROUNDS_AVOIDING_MULTIPATH){
+ ll->avoid_multipath = false;
+ ll->rounds_avoiding_multipath = 0;
+ }
+
+ iterator = parcHashMap_CreateKeyIterator(ll->strategy_state);
+ while (parcIterator_HasNext(iterator)) {
+
+ PARCUnsigned *cid = (PARCUnsigned *) parcIterator_Next(iterator);
+ StrategyNexthopStateLL *state = (StrategyNexthopStateLL *)
+ parcHashMap_Get(ll->strategy_state, cid);
+ double rtt = strategyNexthopStateLL_GetRTTLive(state);
+
+ if((check_losses && strategyNexthopStateLL_IsLossy(state)) ||
+ !strategyNexthopStateLL_IsAllowed(state)){
+ //skip the face
+ continue;
+ }
+
+ if(rtt + STABILITY_FACTOR < bestRtt){
+ //maybe we found a better face
+ double rttInUse = strategyNexthopStateLL_GetRTTInUse(state);
+ unsigned try = strategyNexthopStateLL_GetTryToSwitch(state);
+
+ //we check the rtt in use to check if the new face that we found
+ //gets congested when we use it to send the traffic
+ if(rttInUse < bestRtt || try > MAX_SWITCH_TRY){
+ //we have a new best face!
+ strategyNexthopStateLL_ResetTryToSwitch((StrategyNexthopStateLL*) state);
+ bestRtt = rtt;
+ if(ll->bestFaces[0] != NULL)
+ strategyNexthopStateLL_SetUnusedFace(ll->bestFaces[0]);
+ ll->bestFaces[0] = (StrategyNexthopStateLL*) state;
+ }else{
+ //in this case we should switch but we wait MAX_SWITCH_TRY
+ //before switch to avoid ossillations between different paths
+ strategyNexthopStateLL_IncreaseTryToSwitch(
+ (StrategyNexthopStateLL*) state, ll->round);
+ }
+ }
+ }
+
+ parcIterator_Release(&iterator);
+
+ if(ll->bestFaces[0] == NULL){
+ //we found no face so return
+ ll->bestFaces[0] = NULL;
+ ll->bestFaces[1] = NULL;
+ ll->use2paths = false;
+ goto NEW_ROUND;
+ }
+
+ if(parcHashMap_Size(ll->strategy_state) == 1 || ll->avoid_multipath){
+ //in this case (one face available or avoid multipath) we stop the
+ //search here. Just reset face 1 if needed
+ if(ll->bestFaces[1] != NULL){
+ strategyNexthopStateLL_SetUnusedFace(ll->bestFaces[1]);
+ ll->bestFaces[1] = NULL;
+ }
+ ll->use2paths = false;
+ goto NEW_ROUND;
+ }
+
+ //if we are here we have more than 1 interface, so we search for a second one
+ //to use in case of multipath
+ iterator = parcHashMap_CreateKeyIterator(ll->strategy_state);
+ while (parcIterator_HasNext(iterator)) {
+ PARCUnsigned *cid = (PARCUnsigned *) parcIterator_Next(iterator);
+ if(parcUnsigned_GetUnsigned(cid) !=
+ strategyNexthopStateLL_GetFaceId(ll->bestFaces[0])){
+
+ StrategyNexthopStateLL *state = (StrategyNexthopStateLL *)
+ parcHashMap_Get(ll->strategy_state, cid);
+
+ if((check_losses && strategyNexthopStateLL_IsLossy(state)) ||
+ !strategyNexthopStateLL_IsAllowed(state)){
+ //skip the face
+ continue;
+ }
+
+ if(ll->bestFaces[1] == NULL){
+ //in case of 2 faces we should pass always here
+ ll->bestFaces[1] = state;
+ }else{
+ //TODO this must be tested with more then 2 faces
+ double rtt1 = strategyNexthopStateLL_GetRTTLive(ll->bestFaces[1]);
+ double rttNewFace = strategyNexthopStateLL_GetRTTLive(state);
+ if(rttNewFace + STABILITY_FACTOR < rtt1){
+ strategyNexthopStateLL_SetUnusedFace(ll->bestFaces[1]);
+ ll->bestFaces[1] = state;
+ }
+ }
+ }
+ }
+ parcIterator_Release(&iterator);
+
+ if(ll->bestFaces[1] != NULL){
+ //we are not using the second face yet so we use the normal rtt for comparison
+ double rtt0 = strategyNexthopStateLL_GetRTTProbe(ll->bestFaces[0]);
+ double rtt1 = strategyNexthopStateLL_GetRTTProbe(ll->bestFaces[1]);
+ double diff = fabs(rtt0 - rtt1);
+ if(diff < MAX_LATENCY_DIFF) {
+ //let's start to use 2 paths
+ ll->rounds_with_error = 0;
+ ll->use2paths = true;
+ ll->rounds_in_multipath = 0;
+ }else{
+ //we use only one path
+ strategyNexthopStateLL_SetUnusedFace(ll->bestFaces[1]);
+ ll->bestFaces[1] = NULL;
+ ll->use2paths = false;
+ }
+ }else{
+ ll->use2paths = false;
+ }
+
+ NEW_ROUND:
+#if 1
+ if(ll->use2paths){
+ printf("use 2 paths. rtt face %d = %f queue = %f is_lossy = %d,"
+ "rtt face %d = %f queue = %f is_lossy = %d\n",
+ strategyNexthopStateLL_GetFaceId(ll->bestFaces[0]),
+ strategyNexthopStateLL_GetRTTLive(ll->bestFaces[0]),
+ strategyNexthopStateLL_GetQueuing(ll->bestFaces[0]),
+ strategyNexthopStateLL_IsLossy(ll->bestFaces[0]),
+ strategyNexthopStateLL_GetFaceId(ll->bestFaces[1]),
+ strategyNexthopStateLL_GetRTTLive(ll->bestFaces[1]),
+ strategyNexthopStateLL_GetQueuing(ll->bestFaces[1]),
+ strategyNexthopStateLL_IsLossy(ll->bestFaces[1]));
+ }else{
+ if(ll->bestFaces[0] != NULL){
+ printf("use 1 path. rtt face %d = %f is_lossy = %d (avoid multipath = %d)\n",
+ strategyNexthopStateLL_GetFaceId(ll->bestFaces[0]),
+ strategyNexthopStateLL_GetRTTLive(ll->bestFaces[0]),
+ strategyNexthopStateLL_IsLossy(ll->bestFaces[0]),
+ ll->avoid_multipath);
+ }else{
+ printf("no face to use!\n");
+ }
+ }
+#endif
+ //update the round only at the end for all the faces
+ if(new_round){
+ PARCIterator * iterator = parcHashMap_CreateKeyIterator(ll->strategy_state);
+ while (parcIterator_HasNext(iterator)) {
+ PARCUnsigned *cid = (PARCUnsigned *) parcIterator_Next(iterator);
+ strategyNexthopStateLL_StartNewRound((StrategyNexthopStateLL *)
+ parcHashMap_Get(ll->strategy_state, cid));
+ }
+ parcIterator_Release(&iterator);
+ }
+}
+
+static void strategyLowLatency_BestFaceCB(int fd, PARCEventType which_event,
+ void *data){
+ parcAssertTrue(which_event & PARCEventType_Timeout,
+ "Event incorrect, expecting %X set, got %X",
+ PARCEventType_Timeout, which_event);
+
+ StrategyLowLatency * ll = (StrategyLowLatency *) data;
+ strategyLowLatency_SelectBestFaces(ll, true);
+
+ struct timeval timeout = {0, 500000};
+ parcEventTimer_Start(ll->computeBestFace, &timeout);
+}
+
+StrategyImpl *strategyLowLatency_Create() {
+ StrategyLowLatency *strategy =
+ parcMemory_AllocateAndClear(sizeof(StrategyLowLatency));
+ parcAssertNotNull(strategy, "parcMemory_AllocateAndClear(%zu) returned NULL",
+ sizeof(StrategyLowLatency));
+
+ strategy->strategy_state = parcHashMap_Create();
+ strategy->pending_probes_ticks = parcHashMap_Create();
+ strategy->pending_probes_faces = parcHashMap_Create();
+#ifndef WITH_POLICY
+ strategy->nexthops = numberSet_Create();
+#endif /* ! WITH_POLICY */
+ srand((unsigned int)time(NULL));
+
+ StrategyImpl *impl = parcMemory_AllocateAndClear(sizeof(StrategyImpl));
+ parcAssertNotNull(impl, "parcMemory_AllocateAndClear(%zu) returned NULL",
+ sizeof(StrategyImpl));
+ memcpy(impl, &_template, sizeof(StrategyImpl));
+ impl->context = strategy;
+
+ return impl;
+}
+
+void strategyLowLatency_SetStrategy(StrategyImpl *strategy,
+ const Forwarder * forwarder,
+ const FibEntry * fibEntry){
+ StrategyLowLatency *ll =
+ (StrategyLowLatency *)strategy->context;
+ ll->forwarder = forwarder;
+ ll->fibEntry = fibEntry;
+
+ //create probe packet
+ ll->probe = messageHandler_CreateProbePacket(HF_INET6_TCP, PROBE_LIFETIME);
+ ip_prefix_t address;
+ nameBitvector_ToIPAddress(name_GetContentName(
+ fibEntry_GetPrefix(fibEntry)), &address);
+ ll->name = messageHandler_CreateProbeName(&address);
+
+
+ Dispatcher *dispatcher = forwarder_GetDispatcher((Forwarder *)ll->forwarder);
+ ll->sendProbes = dispatcher_CreateTimer(dispatcher, false,
+ strategyLowLatency_SendProbesCB, ll);
+
+ ll->round = 0;
+ ll->rounds_in_multipath = 0;
+ ll->rounds_with_error = 0;
+ ll->rounds_avoiding_multipath = 0;
+ ll->use2paths = false;
+ ll->avoid_multipath = false;
+
+ ll->computeBestFace = dispatcher_CreateTimer(dispatcher, false,
+ strategyLowLatency_BestFaceCB, ll);
+}
+
+void _startTimers(StrategyImpl *strategy){
+ StrategyLowLatency *ll =
+ (StrategyLowLatency *)strategy->context;
+
+ struct timeval timeoutProbes = {0,10000};
+ parcEventTimer_Start(ll->sendProbes, &timeoutProbes);
+ struct timeval timeoutBF = {1,0};
+ parcEventTimer_Start(ll->computeBestFace, &timeoutBF);
+}
+
+void _stopTimers(StrategyImpl *strategy){
+ StrategyLowLatency *ll =
+ (StrategyLowLatency *)strategy->context;
+
+ parcEventTimer_Stop(ll->sendProbes);
+ parcEventTimer_Stop(ll->computeBestFace);
+}
+
+// =======================================================
+// Dispatch API
+
+strategy_type _strategyLowLatency_GetStrategy(StrategyImpl *strategy) {
+ return SET_STRATEGY_LOW_LATENCY;
+}
+
+static void _strategyLowLatency_ReceiveObject(StrategyImpl *strategy,
+ const NumberSet *egressId,
+ const Message *objectMessage,
+ Ticks pitEntryCreation,
+ Ticks objReception) {
+ StrategyLowLatency *ll = (StrategyLowLatency *)strategy->context;
+
+ if(!messageHandler_IsAProbe(message_FixedHeader(objectMessage)))
+ return;
+
+ uint32_t seq = messageHandler_GetSegment(message_FixedHeader(objectMessage));
+ PARCUnsigned *parc_seq = parcUnsigned_Create(seq);
+ if (!parcHashMap_Contains(ll->pending_probes_ticks, parc_seq)){
+ parcUnsigned_Release(&parc_seq);
+ return;
+ }
+
+ //here numberSet_Length(egressId) should be 1
+ for (unsigned i = 0; i < numberSet_Length(egressId); i++) {
+ unsigned outId = numberSet_GetItem(egressId, i);
+ PARCUnsigned *cid = parcUnsigned_Create(outId);
+
+ const StrategyNexthopStateLL *state =
+ parcHashMap_Get(ll->strategy_state, cid);
+ if (state != NULL) {
+ Ticks time = parcUnsigned_GetUnsigned(
+ parcHashMap_Get(ll->pending_probes_ticks, parc_seq));
+ Ticks now = forwarder_GetTicks(ll->forwarder);
+ Ticks RTT = now - time;
+ if(RTT <= 0)
+ RTT = 1;
+ strategyNexthopStateLL_AddRttSample(
+ (StrategyNexthopStateLL *) state, RTT);
+ parcHashMap_Remove(ll->pending_probes_ticks, parc_seq);
+ } else {
+ // this may happen if we remove a face/route while downloading a file
+ // we should ignore this timeout
+ }
+ parcUnsigned_Release(&cid);
+ }
+ parcUnsigned_Release(&parc_seq);
+}
+
+static void _strategyLowLatency_OnTimeout(StrategyImpl *strategy,
+ const NumberSet *egressId) {}
+
+static NumberSet *_strategyLowLatency_LookupNexthop(StrategyImpl *strategy,
+#ifdef WITH_POLICY
+ NumberSet * nexthops,
+#endif /* WITH_POLICY */
+ const Message *interestMessage) {
+ //unsigned out_connection;
+ NumberSet *out = numberSet_Create();
+
+ StrategyLowLatency *ll = (StrategyLowLatency *)strategy->context;
+
+ //update is_allowed flag of all the next hops
+ PARCIterator *iterator = parcHashMap_CreateKeyIterator(ll->strategy_state);
+ while(parcIterator_HasNext(iterator)){
+ PARCUnsigned *cid = (PARCUnsigned *) parcIterator_Next(iterator);
+ StrategyNexthopStateLL *state =
+ (StrategyNexthopStateLL *) parcHashMap_Get(ll->strategy_state, cid);
+ if(numberSet_Contains(nexthops, parcUnsigned_GetUnsigned(cid))){
+ strategyNexthopStateLL_SetIsAllowed(state,true);
+ }else{
+ strategyNexthopStateLL_SetIsAllowed(state,false);
+ }
+ }
+ parcIterator_Release(&iterator);
+
+ if(ll->bestFaces[0] != NULL &&
+ !strategyNexthopStateLL_IsAllowed(ll->bestFaces[0])){
+ //if ll->bestFaces[0] is not allowed we need to find a new face
+ strategyLowLatency_SelectBestFaces(ll, false);
+ }
+
+ //at this point ll->bestFaces[0] must be allowed
+ //single path case
+ if(ll->bestFaces[0] != NULL && (ll->bestFaces[1] == NULL || !ll->use2paths)){
+ strategyNexthopStateLL_SendPacket(ll->bestFaces[0]);
+ numberSet_Add(out, strategyNexthopStateLL_GetFaceId(ll->bestFaces[0]));
+
+ //multipath case
+ }else if(ll->bestFaces[0] != NULL && ll->bestFaces[1] != NULL && ll->use2paths){
+ //it may happen that ll->bestFaces[1] is not allowed, in that case we send on
+ //ll->bestFaces[0] until the next best face selection
+ if(!strategyNexthopStateLL_IsAllowed(ll->bestFaces[1])){
+ strategyNexthopStateLL_SendPacket(ll->bestFaces[0]);
+ numberSet_Add(out, strategyNexthopStateLL_GetFaceId(ll->bestFaces[0]));
+ }else{
+ double queue0 = strategyNexthopStateLL_GetQueuing(ll->bestFaces[0]);
+ double queue1 = strategyNexthopStateLL_GetQueuing(ll->bestFaces[1]);
+ double prob0 = 0.5;
+ if(queue0 > 1 || queue1 > 1){
+ prob0 = 1.0 - (queue0 / (queue0 + queue1));
+ }
+ double coin = ((double) rand() / (RAND_MAX));
+ if(coin < prob0){
+ strategyNexthopStateLL_SendPacket(ll->bestFaces[0]);
+ numberSet_Add(out, strategyNexthopStateLL_GetFaceId(ll->bestFaces[0]));
+ }else{
+ strategyNexthopStateLL_SendPacket(ll->bestFaces[1]);
+ numberSet_Add(out, strategyNexthopStateLL_GetFaceId(ll->bestFaces[1]));
+ }
+ }
+ }
+ return out;
+}
+
+
+#ifndef WITH_POLICY
+static NumberSet *_strategyLowLatency_ReturnNexthops(StrategyImpl *strategy) {
+ StrategyLoadBalancerLL *ll = (StrategyLoadBalancerLL *)strategy->context;
+ return ll->nexthops;
+}
+
+unsigned _strategyLowLatency_CountNexthops(StrategyImpl *strategy) {
+ StrategyLoadBalancerLL *ll = (StrategyLoadBalancerLL *)strategy->context;
+ return (unsigned)numberSet_Length(ll->nexthops);
+}
+#endif /* ! WITH_POLICY */
+
+static void _strategyLowLatency_AddNexthop(StrategyImpl *strategy,
+ unsigned connectionId) {
+ PARCUnsigned *cid = parcUnsigned_Create(connectionId);
+
+ StrategyLowLatency *ll = (StrategyLowLatency *)strategy->context;
+
+ if (!parcHashMap_Contains(ll->strategy_state, cid)) {
+ StrategyNexthopStateLL *state = strategyNexthopStateLL_Create(connectionId);
+ parcHashMap_Put(ll->strategy_state, cid, state);
+ if(ll->bestFaces[0] == NULL){
+ ll->bestFaces[0] = state;
+ }
+#ifndef WITH_POLICY
+ numberSet_Add(ll->nexthops, connectionId);
+#endif /* WITH_POLICY */
+ }
+
+ if(parcHashMap_Size(ll->strategy_state) >= 2){
+ _startTimers(strategy);
+ }
+
+ parcUnsigned_Release(&cid);
+}
+
+static void _strategyLowLatency_RemoveNexthop(StrategyImpl *strategy,
+ unsigned connectionId) {
+ StrategyLowLatency *ll = (StrategyLowLatency *)strategy->context;
+
+ bool reset_bestFaces = false;
+
+ if((ll->bestFaces[0] != NULL &&
+ strategyNexthopStateLL_GetFaceId(ll->bestFaces[0]) == connectionId) ||
+ (ll->bestFaces[1] != NULL &&
+ strategyNexthopStateLL_GetFaceId(ll->bestFaces[1]) == connectionId)){
+ reset_bestFaces = true;
+ }
+
+ PARCUnsigned *cid = parcUnsigned_Create(connectionId);
+
+ if (parcHashMap_Contains(ll->strategy_state, cid)) {
+ parcHashMap_Remove(ll->strategy_state, cid);
+#ifndef WITH_POLICY
+ numberSet_Remove(lb->nexthops, connectionId);
+#endif /* WITH_POLICY */
+ }
+
+ if(reset_bestFaces){
+ ll->bestFaces[0] = NULL;
+ ll->bestFaces[1] = NULL;
+ strategyLowLatency_SelectBestFaces(ll, false);
+ }
+
+ if(parcHashMap_Size(ll->strategy_state) < 2){
+ _stopTimers(strategy);
+ }
+
+ parcUnsigned_Release(&cid);
+}
+
+static void _strategyLowLatency_ImplDestroy(StrategyImpl **strategyPtr) {
+ parcAssertNotNull(strategyPtr, "Parameter must be non-null double pointer");
+ parcAssertNotNull(*strategyPtr,
+ "Parameter must dereference to non-null pointer");
+
+ StrategyImpl *impl = *strategyPtr;
+ StrategyLowLatency *strategy = (StrategyLowLatency *)impl->context;
+
+ _stopTimers(impl);
+
+ parcEventTimer_Destroy(&(strategy->sendProbes));
+ parcEventTimer_Destroy(&(strategy->computeBestFace));
+
+ if (parcHashMap_Size(strategy->strategy_state) > 0) {
+ PARCIterator *it = parcHashMap_CreateKeyIterator(strategy->strategy_state);
+ while (parcIterator_HasNext(it)) {
+ PARCUnsigned *cid = parcIterator_Next(it);
+ StrategyNexthopStateLL *state =
+ (StrategyNexthopStateLL *)parcHashMap_Get(strategy->strategy_state, cid);
+ parcObject_Release((void**)&state);
+ }
+ parcIterator_Release(&it);
+ }
+
+ parcHashMap_Release(&(strategy->strategy_state));
+ parcHashMap_Release(&(strategy->pending_probes_ticks));
+ parcHashMap_Release(&(strategy->pending_probes_faces));
+
+ parcMemory_Deallocate(&(strategy->probe));
+ parcMemory_Deallocate(&(strategy->name));
+#ifndef WITH_POLICY
+ numberSet_Release(&(strategy->nexthops));
+#endif /* ! WITH_POLICY */
+
+ parcMemory_Deallocate((void **)&strategy);
+ parcMemory_Deallocate((void **)&impl);
+ *strategyPtr = NULL;
+}
diff --git a/hicn-light/src/hicn/strategies/rndSegment.h b/hicn-light/src/hicn/strategies/lowLatency.h
index 6694f03e5..f82a576f1 100644
--- a/hicn-light/src/hicn/strategies/rndSegment.h
+++ b/hicn-light/src/hicn/strategies/lowLatency.h
@@ -14,15 +14,18 @@
*/
/**
- * Forward randomly, selects a path every time the client ask for a new dash
- * segment
+ * Forward on the path with lowest latency
*/
-#ifndef rnd_Segment_h
-#define rnd_Segment_h
+#ifndef lowLatency_h
+#define lowLatency_h
#include <hicn/strategies/strategyImpl.h>
+#include <hicn/core/forwarder.h>
-StrategyImpl *strategyRndSegment_Create();
+StrategyImpl *strategyLowLatency_Create();
-#endif // rnd_Segment_h
+void strategyLowLatency_SetStrategy(StrategyImpl *strategy,
+ const Forwarder * forwarder,
+ const FibEntry * fibEntry);
+#endif // lowLatency_h
diff --git a/hicn-light/src/hicn/strategies/nexthopStateLowLatency.c b/hicn-light/src/hicn/strategies/nexthopStateLowLatency.c
new file mode 100644
index 000000000..fd83bb072
--- /dev/null
+++ b/hicn-light/src/hicn/strategies/nexthopStateLowLatency.c
@@ -0,0 +1,481 @@
+/*
+ * Copyright (c) 2017-2019 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <hicn/hicn-light/config.h>
+#include <stdio.h>
+#include <float.h>
+
+#include <parc/algol/parc_DisplayIndented.h>
+#include <parc/algol/parc_Memory.h>
+#include <parc/algol/parc_Object.h>
+
+#include <parc/assert/parc_Assert.h>
+#include <hicn/strategies/nexthopStateLowLatency.h>
+
+const unsigned MAX_ROUNS_WITHOUT_PROBES = 4;
+ //if we do not receives probes for 4 rounds it means
+ //that we had no responce from any producer for 2 sec
+ //we can say that this interface is daed
+const unsigned MIN_NON_LOSSY_ROUNDS = 10;
+ //number of rounds in non lossy mode before switch to
+ //no lossy state
+const double MAX_LOSS_RATE = 0.15; //15%
+
+struct strategy_nexthop_state_ll {
+ bool in_use;
+ bool is_allowed; // the policy may not allow the use of this face
+ unsigned face_id;
+ unsigned sent_packets;
+ //switch metrics
+ unsigned last_try_to_switch_round;
+ unsigned try_to_switch_counter;
+ //probes counters
+ unsigned recevied_probes;
+ unsigned rounds_without_probes;
+ unsigned sent_probes;
+ unsigned lost_probes;
+ unsigned non_lossy_rounds;
+ //avgs
+ double avg_rtt;
+ double avg_rtt_in_use;
+ double avg_queue;
+ double avg_loss_rate;
+
+};
+
+static bool _strategyNexthopStateLL_Destructor(
+ StrategyNexthopStateLL **instancePtr) {
+ return true;
+}
+
+parcObject_ImplementAcquire(strategyNexthopStateLL, StrategyNexthopStateLL);
+
+parcObject_ImplementRelease(strategyNexthopStateLL, StrategyNexthopStateLL);
+
+parcObject_Override(
+ StrategyNexthopStateLL, PARCObject,
+ .destructor = (PARCObjectDestructor *)_strategyNexthopStateLL_Destructor,
+ .copy = (PARCObjectCopy *)strategyNexthopStateLL_Copy,
+ .display = (PARCObjectDisplay *)strategyNexthopStateLL_Display,
+ .toString = (PARCObjectToString *)strategyNexthopStateLL_ToString,
+ .equals = (PARCObjectEquals *)strategyNexthopStateLL_Equals,
+ .compare = (PARCObjectCompare *)strategyNexthopStateLL_Compare,
+ .hashCode = (PARCObjectHashCode *)strategyNexthopStateLL_HashCode,
+ .display = (PARCObjectDisplay *)strategyNexthopStateLL_Display);
+
+void strategyNexthopStateLL_AssertValid(const StrategyNexthopStateLL *instance) {
+ parcAssertTrue(strategyNexthopStateLL_IsValid(instance),
+ "StrategyNexthopState is not valid.");
+}
+
+StrategyNexthopStateLL *strategyNexthopStateLL_Create(unsigned face_id) {
+ StrategyNexthopStateLL *result =
+ parcObject_CreateInstance(StrategyNexthopStateLL);
+ if (result != NULL) {
+ result->in_use = false;
+ result->is_allowed = true;
+ result->face_id = face_id;
+ result->sent_packets = 0;
+ result->last_try_to_switch_round = 0;
+ result->try_to_switch_counter = 0;
+ result->recevied_probes = 0;
+ result->rounds_without_probes = 0;
+ result->sent_probes = 0;
+ result->lost_probes = 0;
+ result->non_lossy_rounds = MIN_NON_LOSSY_ROUNDS;
+ result->avg_rtt = -1.0;
+ result->avg_rtt_in_use = -1.0;
+ result->avg_queue = 0.0001;
+ result->avg_loss_rate = 0.0;
+ }
+ return result;
+}
+
+void strategyNexthopStateLL_Reset(StrategyNexthopStateLL *x) {
+ x->in_use = false;
+ x->is_allowed = true;
+ x->sent_packets = 0;
+ x->last_try_to_switch_round = 0;
+ x->try_to_switch_counter = 0;
+ x->recevied_probes = 0;
+ x->rounds_without_probes = 0;
+ x->sent_probes = 0;
+ x->lost_probes = 0;
+ x->non_lossy_rounds = MIN_NON_LOSSY_ROUNDS;
+ x->avg_rtt = -1.0;
+ x->avg_rtt_in_use = -1.0;
+ x->avg_queue = 0.0001;
+ x->avg_loss_rate = 0.0;
+}
+
+
+int strategyNexthopStateLL_Compare(const StrategyNexthopStateLL *val,
+ const StrategyNexthopStateLL *other) {
+ if (val == NULL) {
+ if (other != NULL) {
+ return -1;
+ }
+ } else if (other == NULL) {
+ return 1;
+ } else {
+ strategyNexthopStateLL_OptionalAssertValid(val);
+ strategyNexthopStateLL_OptionalAssertValid(other);
+
+ if (val->in_use < other->in_use){
+ return -1;
+ }else if (val->in_use > other->in_use){
+ return 1;
+ }
+
+ if (val->is_allowed < other->is_allowed){
+ return -1;
+ }else if (val->is_allowed> other->is_allowed){
+ return 1;
+ }
+
+ if (val->face_id < other->face_id) {
+ return -1;
+ } else if (val->face_id > other->face_id) {
+ return 1;
+ }
+
+ if (val->sent_packets < other->sent_packets){
+ return -1;
+ } else if (val->sent_packets > other->sent_packets){
+ return 1;
+ }
+
+ if (val->last_try_to_switch_round <
+ other->last_try_to_switch_round) {
+ return -1;
+ } else if (val->last_try_to_switch_round >
+ other->last_try_to_switch_round) {
+ return 1;
+ }
+
+ if (val->try_to_switch_counter <
+ other->try_to_switch_counter) {
+ return -1;
+ } else if (val->try_to_switch_counter >
+ other->try_to_switch_counter) {
+ return 1;
+ }
+
+ if (val->recevied_probes < other->recevied_probes) {
+ return -1;
+ } else if (val->recevied_probes > other->recevied_probes) {
+ return 1;
+ }
+
+ if (val->rounds_without_probes < other->rounds_without_probes) {
+ return -1;
+ } else if (val->rounds_without_probes > other->rounds_without_probes) {
+ return 1;
+ }
+
+ if (val->sent_probes < other->sent_probes) {
+ return -1;
+ } else if (val->sent_probes > other->sent_probes) {
+ return 1;
+ }
+
+ if (val->lost_probes < other->lost_probes) {
+ return -1;
+ } else if (val->lost_probes > other->lost_probes) {
+ return 1;
+ }
+
+ if (val->non_lossy_rounds < other->non_lossy_rounds) {
+ return -1;
+ } else if (val->non_lossy_rounds > other->non_lossy_rounds) {
+ return 1;
+ }
+
+ if (val->avg_rtt < other->avg_rtt) {
+ return -1;
+ } else if (val->avg_rtt > other->avg_rtt) {
+ return 1;
+ }
+
+ if (val->avg_rtt_in_use < other->avg_rtt_in_use) {
+ return -1;
+ } else if (val->avg_rtt_in_use > other->avg_rtt_in_use) {
+ return 1;
+ }
+
+ if (val->avg_queue < other->avg_queue) {
+ return -1;
+ } else if (val->avg_queue > other->avg_queue) {
+ return 1;
+ }
+
+ if (val->avg_loss_rate < other->avg_loss_rate) {
+ return -1;
+ } else if (val->avg_loss_rate > other->avg_loss_rate) {
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
+StrategyNexthopStateLL *strategyNexthopStateLL_Copy(
+ const StrategyNexthopStateLL *original) {
+ StrategyNexthopStateLL *result = strategyNexthopStateLL_Create(original->face_id);
+ result->in_use = original->in_use;
+ result->is_allowed = original->is_allowed;
+ result->sent_packets = original->sent_packets;
+ result->last_try_to_switch_round = original->last_try_to_switch_round;
+ result->try_to_switch_counter = original->try_to_switch_counter;
+ result->recevied_probes = original->recevied_probes;
+ result->rounds_without_probes = original->rounds_without_probes;
+ result->sent_probes = original->sent_probes;
+ result->lost_probes = original->lost_probes;
+ result->non_lossy_rounds = original->non_lossy_rounds;
+ result->avg_rtt = original->avg_rtt;
+ result->avg_rtt_in_use = original->avg_rtt_in_use;
+ result->avg_queue = original->avg_queue;
+ result->avg_loss_rate = original->avg_loss_rate;
+ return result;
+}
+
+void strategyNexthopStateLL_Display(const StrategyNexthopStateLL *instance,
+ int indentation) {
+ parcDisplayIndented_PrintLine(indentation, "StrategyNexthopStateLL@%p {",
+ instance);
+ parcDisplayIndented_PrintLine(indentation + 1, "%d", instance->face_id);
+ parcDisplayIndented_PrintLine(indentation + 1, "%f", instance->avg_rtt);
+ parcDisplayIndented_PrintLine(indentation + 1, "%f", instance->avg_rtt_in_use);
+ parcDisplayIndented_PrintLine(indentation + 1, "%f", instance->avg_queue);
+ parcDisplayIndented_PrintLine(indentation + 1, "%f", instance->avg_loss_rate);
+ parcDisplayIndented_PrintLine(indentation, "}");
+}
+
+
+bool strategyNexthopStateLL_Equals(const StrategyNexthopStateLL *x,
+ const StrategyNexthopStateLL *y) {
+ bool result = false;
+
+ if (x == y) {
+ result = true;
+ } else if (x == NULL || y == NULL) {
+ result = false;
+ } else {
+ strategyNexthopStateLL_OptionalAssertValid(x);
+ strategyNexthopStateLL_OptionalAssertValid(y);
+
+ if (strategyNexthopStateLL_Compare(x, y) == 0) {
+ result = true;
+ }
+ }
+
+ return result;
+}
+
+PARCHashCode strategyNexthopStateLL_HashCode(const StrategyNexthopStateLL *x) {
+ PARCHashCode result = 0;
+ char str[128];
+ sprintf(str, "ID:%d: RTT:%f: RTTUSE:%f: Q:%f L:%f", x->face_id, x->avg_rtt,
+ x->avg_rtt_in_use, x->avg_queue, x->avg_loss_rate);
+ result = parcHashCode_Hash((uint8_t *)&str, strlen(str));
+ return result;
+}
+
+bool strategyNexthopStateLL_IsValid(const StrategyNexthopStateLL *x) {
+ bool result = false;
+
+ if (x != NULL) {
+ result = true;
+ }
+
+ return result;
+}
+
+char *strategyNexthopStateLL_ToString(const StrategyNexthopStateLL *x) {
+ // this is not implemented
+ parcTrapNotImplemented("strategyNexthopStateLL_ToString is not implemented");
+ return NULL;
+}
+
+double strategyNexthopStateLL_GetRTTProbe(StrategyNexthopStateLL *x) {
+ strategyNexthopStateLL_OptionalAssertValid(x);
+
+ if(x->rounds_without_probes > MAX_ROUNS_WITHOUT_PROBES)
+ return DBL_MAX;
+
+ if(x->avg_rtt == -1.0){
+ if(x->avg_rtt_in_use == -1.0){
+ return 0.0;
+ }else{
+ //this happens if the face recevied probes only in in_use mode
+ //we set the avf_rtt with rtt_in_use
+ x->avg_rtt = x->avg_rtt_in_use;
+ }
+ }
+
+ return x->avg_rtt;
+}
+
+double strategyNexthopStateLL_GetRTTInUse(StrategyNexthopStateLL *x) {
+ strategyNexthopStateLL_OptionalAssertValid(x);
+
+ if(x->rounds_without_probes > MAX_ROUNS_WITHOUT_PROBES)
+ return DBL_MAX;
+
+ if(x->avg_rtt_in_use == -1.0)
+ return strategyNexthopStateLL_GetRTTProbe(x);
+
+ return x->avg_rtt_in_use;
+}
+
+double strategyNexthopStateLL_GetRTTLive(StrategyNexthopStateLL *x) {
+ strategyNexthopStateLL_OptionalAssertValid(x);
+
+ if(x->in_use){
+ return strategyNexthopStateLL_GetRTTInUse(x);
+ }else{
+ return strategyNexthopStateLL_GetRTTProbe(x);
+ }
+}
+
+double strategyNexthopStateLL_GetQueuing(const StrategyNexthopStateLL *x) {
+ strategyNexthopStateLL_OptionalAssertValid(x);
+
+ if(x->rounds_without_probes > MAX_ROUNS_WITHOUT_PROBES)
+ return 0.0;
+
+ return x->avg_queue;
+}
+
+void strategyNexthopStateLL_AddRttSample(StrategyNexthopStateLL *x,
+ unsigned int rtt){
+ strategyNexthopStateLL_OptionalAssertValid(x);
+
+ x->recevied_probes++;
+ //form uint to double
+ double drtt = rtt;
+
+ if(x->in_use){
+ if(x->avg_rtt_in_use == -1.0){
+ x->avg_rtt_in_use = drtt;
+ }else{
+ x->avg_rtt_in_use = (x->avg_rtt_in_use * 0.9) + (drtt * 0.1);
+ }
+ }else{
+ if(x->avg_rtt == -1.0){
+ x->avg_rtt = drtt;
+ }else{
+ x->avg_rtt = (x->avg_rtt * 0.9) + (drtt * 0.1);
+ }
+ }
+
+ if(x->avg_rtt_in_use == -1.0 || x->avg_rtt == -1.0){
+ x->avg_queue = 0.0001;
+ }else{
+ double queue = x->avg_rtt_in_use - x->avg_rtt;
+ if(queue < 0){
+ queue = 0.0001;
+ }
+ x->avg_queue = (x->avg_queue * 0.95) + (0.05 * queue);
+ }
+}
+
+void strategyNexthopStateLL_SetUnusedFace(StrategyNexthopStateLL *x){
+ strategyNexthopStateLL_OptionalAssertValid(x);
+ x->in_use = false;
+}
+
+unsigned strategyNexthopStateLL_GetFaceId(StrategyNexthopStateLL *x) {
+ strategyNexthopStateLL_OptionalAssertValid(x);
+ return x->face_id;
+}
+
+void strategyNexthopStateLL_IncreaseTryToSwitch(StrategyNexthopStateLL *x,
+ unsigned round){
+ if(x->try_to_switch_counter == 0 ||
+ round == (x->last_try_to_switch_round + 1)){
+ x->last_try_to_switch_round = round;
+ x->try_to_switch_counter++;
+ }else{
+ x->try_to_switch_counter = 0;
+ }
+}
+
+unsigned strategyNexthopStateLL_GetTryToSwitch(const StrategyNexthopStateLL *x){
+ return x->try_to_switch_counter;
+}
+
+void strategyNexthopStateLL_ResetTryToSwitch(StrategyNexthopStateLL *x){
+ x->try_to_switch_counter = 0;
+}
+
+void strategyNexthopStateLL_SendPacket(StrategyNexthopStateLL *x){
+ x->in_use = true;
+ x->sent_packets++;
+}
+
+void strategyNexthopStateLL_SentProbe(StrategyNexthopStateLL *x){
+ x->sent_probes++;
+}
+
+void strategyNexthopStateLL_LostProbe(StrategyNexthopStateLL *x){
+ x->lost_probes++;
+}
+
+bool strategyNexthopStateLL_IsLossy(const StrategyNexthopStateLL *x){
+ if(x->non_lossy_rounds < 10 ||
+ x->avg_loss_rate > MAX_LOSS_RATE){
+ return true;
+ }
+ return false;
+}
+
+void strategyNexthopStateLL_SetIsAllowed(StrategyNexthopStateLL *x, bool allowed){
+ x->is_allowed = allowed;
+}
+
+bool strategyNexthopStateLL_IsAllowed(const StrategyNexthopStateLL *x){
+ return x->is_allowed;
+}
+
+void strategyNexthopStateLL_StartNewRound(StrategyNexthopStateLL *x){
+ strategyNexthopStateLL_OptionalAssertValid(x);
+ if(x->sent_packets == 0) //the face was not used in the last round
+ x->in_use = false;
+
+ x->sent_packets = 0;
+
+ if(x->recevied_probes == 0){
+ x->rounds_without_probes++;
+ }else{
+ x->rounds_without_probes = 0;
+ }
+
+ x->recevied_probes = 0;
+
+ //compute losses in this round
+ if(x->sent_probes != 0){
+ double loss_rate = (double) x->lost_probes / (double) x->sent_probes;
+ x->avg_loss_rate = x->avg_loss_rate * 0.7 + loss_rate * 0.3;
+ if(x->avg_loss_rate > MAX_LOSS_RATE){
+ x->non_lossy_rounds = 0;
+ }else{
+ x->non_lossy_rounds++;
+ }
+ }
+
+ x->lost_probes = 0;
+ x->sent_probes = 0;
+}
diff --git a/hicn-light/src/hicn/strategies/nexthopStateLowLatency.h b/hicn-light/src/hicn/strategies/nexthopStateLowLatency.h
new file mode 100644
index 000000000..34dbb8262
--- /dev/null
+++ b/hicn-light/src/hicn/strategies/nexthopStateLowLatency.h
@@ -0,0 +1,116 @@
+/*
+ * Copyright (c) 2017-2019 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef nexthopstateLowLatency_h
+#define nexthopstateLowLatency_h
+
+#include <parc/algol/parc_HashCode.h>
+#include <parc/algol/parc_Object.h>
+
+struct strategy_nexthop_state_ll;
+typedef struct strategy_nexthop_state_ll StrategyNexthopStateLL;
+extern parcObjectDescriptor_Declaration(StrategyNexthopStateLL);
+
+/**
+ */
+StrategyNexthopStateLL *strategyNexthopStateLL_Acquire(
+ const StrategyNexthopStateLL *instance);
+
+#ifdef PARCLibrary_DISABLE_VALIDATION
+#define strategyNexthopStateLL_OptionalAssertValid(_instance_)
+#else
+#define strategyNexthopStateLL_OptionalAssertValid(_instance_) \
+ strategyNexthopStateLL_AssertValid(_instance_)
+#endif
+
+/**
+ */
+void strategyNexthopStateLL_AssertValid(const StrategyNexthopStateLL *instance);
+
+/**
+ */
+StrategyNexthopStateLL *strategyNexthopStateLL_Create(unsigned face_id);
+
+void strategyNexthopStateLL_Reset(StrategyNexthopStateLL *x);
+/**
+ */
+int strategyNexthopStateLL_Compare(const StrategyNexthopStateLL *instance,
+ const StrategyNexthopStateLL *other);
+
+/**
+ */
+StrategyNexthopStateLL *strategyNexthopStateLL_Copy(
+ const StrategyNexthopStateLL *original);
+
+/**
+ */
+void strategyNexthopStateLL_Display(const StrategyNexthopStateLL *instance,
+ int indentation);
+
+/**
+ */
+bool strategyNexthopStateLL_Equals(const StrategyNexthopStateLL *x,
+ const StrategyNexthopStateLL *y);
+
+/**
+ */
+PARCHashCode strategyNexthopStateLL_HashCode(
+ const StrategyNexthopStateLL *instance);
+
+/**
+ */
+bool strategyNexthopStateLL_IsValid(const StrategyNexthopStateLL *instance);
+
+/**
+ */
+void strategyNexthopStateLL_Release(StrategyNexthopStateLL **instancePtr);
+
+/**
+ */
+char *strategyNexthopStateLL_ToString(const StrategyNexthopStateLL *instance);
+
+/**
+ */
+double strategyNexthopStateLL_GetRTTProbe(StrategyNexthopStateLL *x);
+double strategyNexthopStateLL_GetRTTInUse(StrategyNexthopStateLL *x);
+double strategyNexthopStateLL_GetRTTLive(StrategyNexthopStateLL *x);
+double strategyNexthopStateLL_GetQueuing(const StrategyNexthopStateLL *x);
+void strategyNexthopStateLL_AddRttSample(StrategyNexthopStateLL *x,
+ unsigned int rtt);
+
+
+void strategyNexthopStateLL_IncreaseTryToSwitch(StrategyNexthopStateLL *x,
+ unsigned round);
+unsigned strategyNexthopStateLL_GetTryToSwitch(const StrategyNexthopStateLL *x);
+void strategyNexthopStateLL_ResetTryToSwitch(StrategyNexthopStateLL *x);
+
+void strategyNexthopStateLL_SetUnusedFace(StrategyNexthopStateLL *x);
+
+unsigned strategyNexthopStateLL_GetFaceId(StrategyNexthopStateLL *x);
+
+void strategyNexthopStateLL_SendPacket(StrategyNexthopStateLL *x);
+
+void strategyNexthopStateLL_SentProbe(StrategyNexthopStateLL *x);
+
+void strategyNexthopStateLL_LostProbe(StrategyNexthopStateLL *x);
+
+bool strategyNexthopStateLL_IsLossy(const StrategyNexthopStateLL *x);
+
+void strategyNexthopStateLL_SetIsAllowed(StrategyNexthopStateLL *x, bool allowed);
+
+bool strategyNexthopStateLL_IsAllowed(const StrategyNexthopStateLL *x);
+
+void strategyNexthopStateLL_StartNewRound(StrategyNexthopStateLL *x);
+#endif
diff --git a/hicn-light/src/hicn/strategies/nexthopStateWithPD.c b/hicn-light/src/hicn/strategies/nexthopStateWithPD.c
deleted file mode 100644
index 1a5d34b78..000000000
--- a/hicn-light/src/hicn/strategies/nexthopStateWithPD.c
+++ /dev/null
@@ -1,254 +0,0 @@
-/*
- * Copyright (c) 2017-2019 Cisco and/or its affiliates.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at:
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <float.h>
-#include <limits.h>
-#include <hicn/hicn-light/config.h>
-#include <stdio.h>
-
-#include <parc/algol/parc_DisplayIndented.h>
-#include <parc/algol/parc_Memory.h>
-#include <parc/algol/parc_Object.h>
-#include <parc/assert/parc_Assert.h>
-
-#include <hicn/strategies/nexthopStateWithPD.h>
-
-struct strategy_nexthop_state_with_pd {
- unsigned int pi;
- unsigned delay;
- double weight;
- double avg_pi;
-};
-
-static bool _strategyNexthopStateWithPD_Destructor(
- StrategyNexthopStateWithPD **instancePtr) {
- return true;
-}
-
-parcObject_ImplementAcquire(strategyNexthopStateWithPD,
- StrategyNexthopStateWithPD);
-
-parcObject_ImplementRelease(strategyNexthopStateWithPD,
- StrategyNexthopStateWithPD);
-
-parcObject_Override(
- StrategyNexthopStateWithPD, PARCObject,
- .destructor = (PARCObjectDestructor *)
- _strategyNexthopStateWithPD_Destructor,
- .copy = (PARCObjectCopy *)strategyNexthopStateWithPD_Copy,
- .display = (PARCObjectDisplay *)strategyNexthopStateWithPD_Display,
- .toString = (PARCObjectToString *)strategyNexthopStateWithPD_ToString,
- .equals = (PARCObjectEquals *)strategyNexthopStateWithPD_Equals,
- .compare = (PARCObjectCompare *)strategyNexthopStateWithPD_Compare,
- .hashCode = (PARCObjectHashCode *)strategyNexthopStateWithPD_HashCode,
- .display = (PARCObjectDisplay *)strategyNexthopStateWithPD_Display);
-
-void strategyNexthopStateWithPD_AssertValid(
- const StrategyNexthopStateWithPD *instance) {
- parcAssertTrue(strategyNexthopStateWithPD_IsValid(instance),
- "StrategyNexthopStateWithPD is not valid.");
-}
-
-StrategyNexthopStateWithPD *strategyNexthopStateWithPD_Create() {
- StrategyNexthopStateWithPD *result =
- parcObject_CreateInstance(StrategyNexthopStateWithPD);
- if (result != NULL) {
- result->pi = 0;
- result->avg_pi = 1.0;
- result->weight = 1;
- result->delay = 0;
- }
- return result;
-}
-
-void strategyNexthopStateWithPD_Reset(StrategyNexthopStateWithPD *x) {
- x->pi = 0;
- x->avg_pi = 1.0;
- x->weight = 1;
- x->delay = 0;
-}
-
-int strategyNexthopStateWithPD_Compare(
- const StrategyNexthopStateWithPD *val,
- const StrategyNexthopStateWithPD *other) {
- if (val == NULL) {
- if (other != NULL) {
- return -1;
- }
- } else if (other == NULL) {
- return 1;
- } else {
- strategyNexthopStateWithPD_OptionalAssertValid(val);
- strategyNexthopStateWithPD_OptionalAssertValid(other);
-
- if (val->pi < other->pi) {
- return -1;
- } else if (val->pi > other->pi) {
- return 1;
- }
-
- if (val->avg_pi < other->avg_pi) {
- return -1;
- } else if (val->avg_pi > other->avg_pi) {
- return 1;
- }
-
- if (val->weight < other->weight) {
- return -1;
- } else if (val->weight > other->weight) {
- return 1;
- }
-
- if (val->delay < other->delay) {
- return -1;
- } else if (val->delay > other->delay) {
- return 1;
- }
- }
-
- return 0;
-}
-
-StrategyNexthopStateWithPD *strategyNexthopStateWithPD_Copy(
- const StrategyNexthopStateWithPD *original) {
- StrategyNexthopStateWithPD *result = strategyNexthopStateWithPD_Create();
- result->pi = original->pi;
- result->avg_pi = original->avg_pi;
- result->weight = original->weight;
- result->delay = original->delay;
-
- return result;
-}
-
-void strategyNexthopStateWithPD_Display(
- const StrategyNexthopStateWithPD *instance, int indentation) {
- parcDisplayIndented_PrintLine(indentation, "StrategyNexthopStateWithPD@%p {",
- instance);
- parcDisplayIndented_PrintLine(indentation + 1, "%d", instance->pi);
- parcDisplayIndented_PrintLine(indentation + 1, "%f", instance->avg_pi);
- parcDisplayIndented_PrintLine(indentation + 1, "%f", instance->weight);
- parcDisplayIndented_PrintLine(indentation + 1, "%f", instance->delay);
- parcDisplayIndented_PrintLine(indentation, "}");
-}
-
-bool strategyNexthopStateWithPD_Equals(const StrategyNexthopStateWithPD *x,
- const StrategyNexthopStateWithPD *y) {
- bool result = false;
-
- if (x == y) {
- result = true;
- } else if (x == NULL || y == NULL) {
- result = false;
- } else {
- strategyNexthopStateWithPD_OptionalAssertValid(x);
- strategyNexthopStateWithPD_OptionalAssertValid(y);
-
- if (strategyNexthopStateWithPD_Compare(x, y) == 0) {
- result = true;
- }
- }
-
- return result;
-}
-
-PARCHashCode strategyNexthopStateWithPD_HashCode(
- const StrategyNexthopStateWithPD *x) {
- PARCHashCode result = 0;
- char str[128];
- sprintf(str, "PI:%d: AVG_PI:%f: W:%f D:%d", x->pi, x->avg_pi, x->weight,
- x->delay);
- result = parcHashCode_Hash((uint8_t *)&str, strlen(str));
- return result;
-}
-
-bool strategyNexthopStateWithPD_IsValid(const StrategyNexthopStateWithPD *x) {
- bool result = false;
-
- if (x != NULL) {
- result = true;
- }
-
- return result;
-}
-
-char *strategyNexthopStateWithPD_ToString(const StrategyNexthopStateWithPD *x) {
- // this is not implemented
- parcTrapNotImplemented(
- "strategyNexthopStateWithPD_ToString is not implemented");
- return NULL;
-}
-
-unsigned strategyNexthopStateWithPD_GetPI(const StrategyNexthopStateWithPD *x) {
- strategyNexthopStateWithPD_OptionalAssertValid(x);
-
- return x->pi;
-}
-
-double strategyNexthopStateWithPD_GetAvgPI(
- const StrategyNexthopStateWithPD *x) {
- strategyNexthopStateWithPD_OptionalAssertValid(x);
-
- return x->avg_pi;
-}
-
-double strategyNexthopStateWithPD_GetWeight(
- const StrategyNexthopStateWithPD *x) {
- strategyNexthopStateWithPD_OptionalAssertValid(x);
-
- return x->weight;
-}
-
-unsigned strategyNexthopStateWithPD_GetDelay(
- const StrategyNexthopStateWithPD *x) {
- strategyNexthopStateWithPD_OptionalAssertValid(x);
-
- return x->delay;
-}
-
-void strategyNexthopStateWithPD_SetDelay(StrategyNexthopStateWithPD *x,
- unsigned delay) {
- strategyNexthopStateWithPD_OptionalAssertValid(x);
- if (delay != 0) {
- x->delay = delay;
- }
-}
-
-double strategyNexthopStateWithPD_UpdateState(StrategyNexthopStateWithPD *x,
- bool inc, unsigned min_delay,
- double alpha) {
- strategyNexthopStateWithPD_OptionalAssertValid(x);
-
- if (inc) {
- x->pi++;
- } else {
- if (x->pi > 0) {
- x->pi--;
- }
- }
-
- x->avg_pi = (x->avg_pi * alpha) + (x->pi * (1 - alpha));
- if (x->avg_pi == 0.0) {
- x->avg_pi = 0.1;
- }
-
- double factor = 1.0;
- if (min_delay != INT_MAX && x->delay != 0) {
- factor = ((double)min_delay / (double)x->delay);
- }
-
- x->weight = 1 / (x->avg_pi * factor);
-
- return x->weight;
-}
diff --git a/hicn-light/src/hicn/strategies/nexthopStateWithPD.h b/hicn-light/src/hicn/strategies/nexthopStateWithPD.h
deleted file mode 100644
index 4d8bd6d15..000000000
--- a/hicn-light/src/hicn/strategies/nexthopStateWithPD.h
+++ /dev/null
@@ -1,106 +0,0 @@
-/*
- * Copyright (c) 2017-2019 Cisco and/or its affiliates.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at:
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef nexthopstatewithpd_h
-#define nexthopstatewithpd_h
-
-#include <parc/algol/parc_HashCode.h>
-#include <parc/algol/parc_Object.h>
-
-struct strategy_nexthop_state_with_pd;
-typedef struct strategy_nexthop_state_with_pd StrategyNexthopStateWithPD;
-extern parcObjectDescriptor_Declaration(StrategyNexthopStateWithPD);
-
-/**
- */
-StrategyNexthopStateWithPD *strategyNexthopStateWithPD_Acquire(
- const StrategyNexthopStateWithPD *instance);
-
-#ifdef PARCLibrary_DISABLE_VALIDATION
-#define strategyNexthopStateWithPD_OptionalAssertValid(_instance_)
-#else
-#define strategyNexthopStateWithPD_OptionalAssertValid(_instance_) \
- strategyNexthopStateWithPD_AssertValid(_instance_)
-#endif
-
-/**
- */
-void strategyNexthopStateWithPD_AssertValid(
- const StrategyNexthopStateWithPD *instance);
-
-/**
- */
-StrategyNexthopStateWithPD *strategyNexthopStateWithPD_Create();
-
-void strategyNexthopStateWithPD_Reset(StrategyNexthopStateWithPD *x);
-/**
- */
-int strategyNexthopStateWithPD_Compare(
- const StrategyNexthopStateWithPD *instance,
- const StrategyNexthopStateWithPD *other);
-
-/**
- */
-StrategyNexthopStateWithPD *strategyNexthopStateWithPD_Copy(
- const StrategyNexthopStateWithPD *original);
-
-/**
- */
-void strategyNexthopStateWithPD_Display(
- const StrategyNexthopStateWithPD *instance, int indentation);
-
-/**
- */
-bool strategyNexthopStateWithPD_Equals(const StrategyNexthopStateWithPD *x,
- const StrategyNexthopStateWithPD *y);
-
-/**
- */
-PARCHashCode strategyNexthopStateWithPD_HashCode(
- const StrategyNexthopStateWithPD *instance);
-
-/**
- */
-bool strategyNexthopStateWithPD_IsValid(
- const StrategyNexthopStateWithPD *instance);
-
-/**
- */
-void strategyNexthopStateWithPD_Release(
- StrategyNexthopStateWithPD **instancePtr);
-
-/**
- */
-char *strategyNexthopStateWithPD_ToString(
- const StrategyNexthopStateWithPD *instance);
-
-/**
- */
-unsigned strategyNexthopStateWithPD_GetPI(const StrategyNexthopStateWithPD *x);
-
-double strategyNexthopStateWithPD_GetAvgPI(const StrategyNexthopStateWithPD *x);
-
-double strategyNexthopStateWithPD_GetWeight(
- const StrategyNexthopStateWithPD *x);
-
-unsigned strategyNexthopStateWithPD_GetDelay(
- const StrategyNexthopStateWithPD *x);
-void strategyNexthopStateWithPD_SetDelay(StrategyNexthopStateWithPD *x,
- unsigned delay);
-
-double strategyNexthopStateWithPD_UpdateState(StrategyNexthopStateWithPD *x,
- bool inc, unsigned min_delay,
- double alpha);
-#endif
diff --git a/hicn-light/src/hicn/strategies/rnd.c b/hicn-light/src/hicn/strategies/rnd.c
index 637fd90f9..064f3965b 100644
--- a/hicn-light/src/hicn/strategies/rnd.c
+++ b/hicn-light/src/hicn/strategies/rnd.c
@@ -28,9 +28,12 @@
static void _strategyRnd_ReceiveObject(StrategyImpl *strategy,
const NumberSet *egressId,
- const Message *objectMessage, Ticks rtt);
+ const Message *objectMessage,
+ Ticks pitEntryCreation,
+ Ticks objReception);
static void _strategyRnd_OnTimeout(StrategyImpl *strategy,
const NumberSet *egressId);
+
static NumberSet *_strategyRnd_LookupNexthop(StrategyImpl *strategy,
#ifdef WITH_POLICY
NumberSet * nexthops,
@@ -62,21 +65,21 @@ static StrategyImpl _template = {
.getStrategy = &_strategyRnd_GetStrategy,
};
+#ifndef WITH_POLICY
struct strategy_rnd;
typedef struct strategy_rnd StrategyRnd;
struct strategy_rnd {
-#ifndef WITH_POLICY
NumberSet *nexthops;
-#endif /* ! WITH_POLICY */
};
+#endif /* ! WITH_POLICY */
StrategyImpl *strategyRnd_Create() {
+#ifndef WITH_POLICY
StrategyRnd *strategy = parcMemory_AllocateAndClear(sizeof(StrategyRnd));
parcAssertNotNull(strategy, "parcMemory_AllocateAndClear(%zu) returned NULL",
sizeof(StrategyRnd));
-#ifndef WITH_POLICY
strategy->nexthops = numberSet_Create();
#endif /* ! WITH_POLICY */
srand((unsigned int)time(NULL));
@@ -85,7 +88,9 @@ StrategyImpl *strategyRnd_Create() {
parcAssertNotNull(impl, "parcMemory_AllocateAndClear(%zu) returned NULL",
sizeof(StrategyImpl));
memcpy(impl, &_template, sizeof(StrategyImpl));
+#ifndef WITH_POLICY
impl->context = strategy;
+#endif /* ! WITH_POLICY */
return impl;
}
@@ -111,7 +116,8 @@ static int _select_Nexthop(StrategyRnd *strategy) {
static void _strategyRnd_ReceiveObject(StrategyImpl *strategy,
const NumberSet *egressId,
const Message *objectMessage,
- Ticks rtt) {}
+ Ticks pitEntryCreation,
+ Ticks objReception) {}
static void _strategyRnd_OnTimeout(StrategyImpl *strategy,
const NumberSet *egressId) {}
@@ -193,13 +199,13 @@ static void _strategyRnd_ImplDestroy(StrategyImpl **strategyPtr) {
"Parameter must dereference to non-null pointer");
StrategyImpl *impl = *strategyPtr;
- StrategyRnd *strategy = (StrategyRnd *)impl->context;
#ifndef WITH_POLICY
+ StrategyRnd *strategy = (StrategyRnd *)impl->context;
numberSet_Release(&(strategy->nexthops));
+ parcMemory_Deallocate((void **)&strategy);
#endif /* ! WITH_POLICY */
- parcMemory_Deallocate((void **)&strategy);
parcMemory_Deallocate((void **)&impl);
*strategyPtr = NULL;
}
diff --git a/hicn-light/src/hicn/strategies/rndSegment.c b/hicn-light/src/hicn/strategies/rndSegment.c
deleted file mode 100644
index 93e39ee74..000000000
--- a/hicn-light/src/hicn/strategies/rndSegment.c
+++ /dev/null
@@ -1,225 +0,0 @@
-/*
- * Copyright (c) 2017-2019 Cisco and/or its affiliates.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at:
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <hicn/hicn-light/config.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <time.h>
-
-#include <parc/assert/parc_Assert.h>
-
-#include <parc/algol/parc_HashMap.h>
-#include <parc/algol/parc_Memory.h>
-#include <hicn/core/nameBitvector.h>
-#include <hicn/strategies/rndSegment.h>
-
-static void _strategyRndSegment_ReceiveObject(StrategyImpl *strategy,
- const NumberSet *egressId,
- const Message *objectMessage,
- Ticks rtt);
-static void _strategyRndSegment_OnTimeout(StrategyImpl *strategy,
- const NumberSet *egressId);
-static NumberSet *_strategyRndSegment_LookupNexthop(
- StrategyImpl *strategy,
-#ifdef WITH_POLICY
- NumberSet * nexthops,
-#endif /* WITH_POLICY */
- const Message *interestMessage);
-#ifndef WITH_POLICY
-static NumberSet *_strategyRndSegment_ReturnNexthops(StrategyImpl *strategy);
-static unsigned _strategyRndSegment_CountNexthops(StrategyImpl *strategy);
-#endif /* ! WITH_POLICY */
-static void _strategyRndSegment_AddNexthop(StrategyImpl *strategy,
- unsigned connectionId);
-static void _strategyRndSegment_RemoveNexthop(StrategyImpl *strategy,
- unsigned connectionId);
-static void _strategyRndSegment_ImplDestroy(StrategyImpl **strategyPtr);
-static strategy_type _strategyRndSegment_GetStrategy(StrategyImpl *strategy);
-
-static StrategyImpl _template = {
- .context = NULL,
- .receiveObject = &_strategyRndSegment_ReceiveObject,
- .onTimeout = &_strategyRndSegment_OnTimeout,
- .lookupNexthop = &_strategyRndSegment_LookupNexthop,
-#ifndef WITH_POLICY
- .returnNexthops = &_strategyRndSegment_ReturnNexthops,
- .countNexthops = &_strategyRndSegment_CountNexthops,
-#endif /* ! WITH_POLICY */
- .addNexthop = &_strategyRndSegment_AddNexthop,
- .removeNexthop = &_strategyRndSegment_RemoveNexthop,
- .destroy = &_strategyRndSegment_ImplDestroy,
- .getStrategy = &_strategyRndSegment_GetStrategy,
-};
-
-struct strategy_rnd_segment;
-typedef struct strategy_rnd_segment StrategyRndSegment;
-
-struct strategy_rnd_segment {
- NumberSet *nexthops;
- NameBitvector *segmentName;
- int last_used_face;
-};
-
-StrategyImpl *strategyRndSegment_Create() {
- StrategyRndSegment *strategy =
- parcMemory_AllocateAndClear(sizeof(StrategyRndSegment));
- parcAssertNotNull(strategy, "parcMemory_AllocateAndClear(%zu) returned NULL",
- sizeof(StrategyRndSegment));
-
- strategy->nexthops = numberSet_Create();
- strategy->segmentName = NULL;
- strategy->last_used_face = 0;
- srand((unsigned int)time(NULL));
-
- StrategyImpl *impl = parcMemory_AllocateAndClear(sizeof(StrategyImpl));
- parcAssertNotNull(impl, "parcMemory_AllocateAndClear(%zu) returned NULL",
- sizeof(StrategyImpl));
- memcpy(impl, &_template, sizeof(StrategyImpl));
- impl->context = strategy;
-
- return impl;
-}
-
-// =======================================================
-// Dispatch API
-
-strategy_type _strategyRndSegment_GetStrategy(StrategyImpl *strategy) {
- return SET_STRATEGY_RANDOM_PER_DASH_SEGMENT;
-}
-
-static int _select_Nexthop(StrategyRndSegment *strategy) {
- unsigned len = (unsigned)numberSet_Length(strategy->nexthops);
- if (len == 0) {
- return -1;
- }
-
- int rnd = (rand() % len);
- return numberSet_GetItem(strategy->nexthops, rnd);
-}
-
-static void _strategyRndSegment_ReceiveObject(StrategyImpl *strategy,
- const NumberSet *egressId,
- const Message *objectMessage,
- Ticks rtt) {}
-
-static void _strategyRndSegment_OnTimeout(StrategyImpl *strategy,
- const NumberSet *egressId) {}
-
-static NumberSet *_strategyRndSegment_LookupNexthop(
- StrategyImpl *strategy,
-#ifdef WITH_POLICY
- NumberSet * nexthops,
-#endif /* WITH_POLICY */
- const Message *interestMessage) {
- StrategyRndSegment *srnd = (StrategyRndSegment *)strategy->context;
-
- unsigned in_connection = message_GetIngressConnectionId(interestMessage);
- unsigned nexthopSize = (unsigned)numberSet_Length(srnd->nexthops);
-
- NumberSet *out = numberSet_Create();
- if ((nexthopSize == 0) ||
- ((nexthopSize == 1) &&
- numberSet_Contains(srnd->nexthops, in_connection))) {
- // there are no output faces or the input face is also the only output face.
- // return null to avoid loops
- return out;
- }
-
- NameBitvector *interestName =
- name_GetContentName(message_GetName(interestMessage));
-
- if (srnd->segmentName == NULL) {
- srnd->segmentName = nameBitvector_Copy(interestName);
- } else if (!nameBitvector_Equals(srnd->segmentName, interestName)) {
- nameBitvector_Destroy(&srnd->segmentName);
- srnd->segmentName = nameBitvector_Copy(interestName);
- } else {
- // here we need to check if the output face still exists or if someone erase
- // it
- if (numberSet_Contains(srnd->nexthops, srnd->last_used_face)) {
- // face exists, so keep using it!
- numberSet_Add(out, srnd->last_used_face);
- return out;
- } else {
- // the face does not exists anymore, try to find a new face but keep the
- // name of the dash segment
- }
- }
-
- int out_connection;
- do {
- out_connection = _select_Nexthop(srnd);
- } while (out_connection == in_connection);
-
- if (out_connection == -1) {
- return out;
- }
-
- srnd->last_used_face = out_connection;
- numberSet_Add(out, out_connection);
- return out;
-}
-
-#ifndef WITH_POLICY
-static NumberSet *_strategyRndSegment_ReturnNexthops(StrategyImpl *strategy) {
- StrategyRndSegment *srnd = (StrategyRndSegment *)strategy->context;
- return srnd->nexthops;
-}
-
-unsigned _strategyRndSegment_CountNexthops(StrategyImpl *strategy) {
- StrategyRndSegment *srnd = (StrategyRndSegment *)strategy->context;
- return (unsigned)numberSet_Length(srnd->nexthops);
-}
-#endif /* ! WITH_POLICY */
-
-static void _strategyRndSegment_AddNexthop(StrategyImpl *strategy,
- unsigned connectionId) {
-#ifndef WITH_POLICY
- StrategyRndSegment *srnd = (StrategyRndSegment *)strategy->context;
- if (!numberSet_Contains(srnd->nexthops, connectionId)) {
- numberSet_Add(srnd->nexthops, connectionId);
- }
-#endif /* ! WITH_POLICY */
-}
-
-static void _strategyRndSegment_RemoveNexthop(StrategyImpl *strategy,
- unsigned connectionId) {
-#ifndef WITH_POLICY
- StrategyRndSegment *srnd = (StrategyRndSegment *)strategy->context;
-
- if (numberSet_Contains(srnd->nexthops, connectionId)) {
- numberSet_Remove(srnd->nexthops, connectionId);
- }
-#endif /* ! WITH_POLICY */
-}
-
-static void _strategyRndSegment_ImplDestroy(StrategyImpl **strategyPtr) {
- parcAssertNotNull(strategyPtr, "Parameter must be non-null double pointer");
- parcAssertNotNull(*strategyPtr,
- "Parameter must dereference to non-null pointer");
-
- StrategyImpl *impl = *strategyPtr;
- StrategyRndSegment *strategy = (StrategyRndSegment *)impl->context;
-
- numberSet_Release(&(strategy->nexthops));
- if (strategy->segmentName != NULL) {
- nameBitvector_Destroy(&strategy->segmentName);
- }
-
- parcMemory_Deallocate((void **)&strategy);
- parcMemory_Deallocate((void **)&impl);
- *strategyPtr = NULL;
-}
diff --git a/hicn-light/src/hicn/strategies/strategyImpl.h b/hicn-light/src/hicn/strategies/strategyImpl.h
index d4001194a..140da5bf8 100644
--- a/hicn-light/src/hicn/strategies/strategyImpl.h
+++ b/hicn-light/src/hicn/strategies/strategyImpl.h
@@ -52,7 +52,8 @@ typedef struct strategy_impl StrategyImpl;
struct strategy_impl {
void *context;
void (*receiveObject)(StrategyImpl *strategy, const NumberSet *egressId,
- const Message *objectMessage, Ticks rtt);
+ const Message *objectMessage, Ticks pitEntryCreation,
+ Ticks objReception);
void (*onTimeout)(StrategyImpl *strategy, const NumberSet *egressId);
NumberSet *(*lookupNexthop)(StrategyImpl *strategy,
#ifdef WITH_POLICY
diff --git a/hicn-light/src/hicn/utils/commands.h b/hicn-light/src/hicn/utils/commands.h
index 1e227ad23..1cce8edd3 100644
--- a/hicn-light/src/hicn/utils/commands.h
+++ b/hicn-light/src/hicn/utils/commands.h
@@ -243,8 +243,7 @@ typedef struct {
typedef enum {
SET_STRATEGY_LOADBALANCER,
SET_STRATEGY_RANDOM,
- SET_STRATEGY_RANDOM_PER_DASH_SEGMENT,
- SET_STRATEGY_LOADBALANCER_WITH_DELAY,
+ SET_STRATEGY_LOW_LATENCY,
LAST_STRATEGY_VALUE
} strategy_type;