+
+/**
+ * Enum defining all known property types for ATS Enum values are used
+ * in the GNUNET_TRANSPORT_ATS_Information struct as
+ * (key,value)-pairs.
+ *
+ * Cost are always stored in uint32_t, so all units used to define costs
+ * have to be normalized to fit in uint32_t [0 .. 4.294.967.295]
+ *
+ * To keep the elements ordered
+ * 1..1024 : Values with a relation to cost
+ * 1025..2048 : Values with a relation to quality
+ * 2049..3072 : Values with a relation to availability
+ *
+ */
+enum GNUNET_TRANSPORT_ATS_Property
+{
+
+ /**
+ * End of the array.
+ */
+ GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR = 0,
+
+ /* Cost related values */
+ /* =================== */
+
+ /**
+ * Volume based cost in financial units to transmit data
+ *
+ * Note: This value is not bound to a specific currency or unit and only
+ * used locally.
+ * "cent" just refers the smallest amount of money in the respective
+ * currency.
+ *
+ * Unit: [cent/MB]
+ *
+ * Interpretation: less is better
+ *
+ * Examples:
+ * LAN: 0 [cent/MB]
+ * 2G : 10 [cent/MB]
+ */
+ GNUNET_TRANSPORT_ATS_COST_FINANCIAL_PER_VOLUME = 1,
+
+ /**
+ * Time based cost in financial units to transmit data
+ *
+ * Note: This value is not bound to a specific currency or unit and only
+ * used locally.
+ * "cent" just refers the smallest amount of money in the respective
+ * currency.
+ *
+ * Unit: [cent/h]
+ *
+ * Interpretation: less is better
+ *
+ * Examples:
+ * LAN : 0 [cent/h]
+ * Dialup: 10 [cent/h]
+ */
+ GNUNET_TRANSPORT_ATS_COST_FINANCIAL_PER_TIME = 2,
+
+ /**
+ * Computational costs
+ *
+ * Effort of preparing data to be sent with this transport
+ * Includes encoding, encryption and conversion of data
+ * Partial values can be summed up: c_sum = c_enc + c_enc + c_conv
+ * Resulting values depend on local system properties, e.g. CPU
+ *
+ * Unit: [ms/GB]
+ *
+ * Interpretation: less is better
+ *
+ * Examples:
+ *
+ * HTTPS with AES CBC-256: 7,382
+ * HTTPS with AES CBC-128: 5,279
+ * HTTPS with RC4-1024: 2,652
+ */
+ GNUNET_TRANSPORT_ATS_COST_COMPUTATIONAL = 3,
+
+ /**
+ * Energy consumption
+ *
+ * Energy consumption using this transport when sending with a certain
+ * power at a certain bitrate. This is only an approximation based on:
+ * Energy consumption E = P / D
+ *
+ * with:
+ * Power P in Watt (J/s)
+ * Datarate D in MBit/s
+ *
+ * Conversion between power P and dBm used by WLAN in radiotap's dBm TX power:
+ *
+ * Lp(dbm) = 10 log10 (P/ 1mW)
+ *
+ * => P = 1 mW * 10^(Lp(dbm)/10)
+ *
+ * Unit: [mJ/MB]
+ *
+ * Interpretation: less is better
+ *
+ * Examples:
+ *
+ * LAN: 0
+ * WLAN: 89 (600 mW @ 802.11g /w 54 MBit/s)
+ * Bluetooth: 267 (100 mW @ BT2.0 EDR /w 3 MBit/s)
+ */
+ GNUNET_TRANSPORT_ATS_COST_ENERGY_CONSUMPTION = 4,
+
+ /**
+ * Connect cost
+ * How many bytes are transmitted to initiate a new connection using
+ * this transport?
+ *
+ * Unit: [bytes]
+ *
+ * Interpretation: less is better
+ *
+ * Examples:
+ *
+ * UDP (No connection) :
+ * 0 bytes
+ * TCP (TCP 3-Way handshake):
+ * 220 bytes Ethernet, 172 bytes TCP/IP, 122 bytes TCP
+ * HTTP (TCP + Header) :
+ * 477 bytes Ethernet, 429 bytes TCP/IP, 374 bytes TCP, 278 bytes HTTP
+ * HTTPS HTTP+TLS Handshake:
+ * 2129 bytes Ethernet, 1975 bytes TCP/IP, 1755 bytes TCP, 1403 bytes HTTPS
+ *
+ * */
+ GNUNET_TRANSPORT_ATS_COST_CONNECT = 5,
+
+ /**
+ * Bandwidth cost
+ *
+ * How many bandwidth is available to consume?
+ * Used to calculate which impact sending data with this transport has
+ *
+ * Unit: [kB/s]
+ *
+ * Interpretation: more is better
+ *
+ * Examples:
+ * LAN: 12,800 (100 MBit/s)
+ * WLAN: 6,912 (54 MBit/s)
+ * Dial-up: 8 (64 Kbit/s)
+ *
+ */
+ GNUNET_TRANSPORT_ATS_COST_BANDWITH_AVAILABLE = 6,
+
+ /**
+ * Network overhead
+ *
+ * How many bytes are sent over the wire when 1 kilobyte (1024 bytes)
+ * of application data is transmitted?
+ * A factor used with connect cost, bandwidth cost and energy cost
+ * to describe the overhead produced by the transport protocol
+ *
+ * Unit: [bytes/kb]
+ *
+ * Interpretation: less is better
+ *
+ * Examples:
+ *
+ * TCP/IPv4 over Ethernet: 1024 + 38 + 20 + 20 = 1102 [bytes/kb]
+ * TCP/IPv6 over Ethernet: 1024 + 38 + 20 + 40 = 1122 [bytes/kb]
+ * UDP/IPv4 over Ethernet: 1024 + 38 + 20 + 8 = 1090 [bytes/kb]
+ * UDP/IPv6 over Ethernet: 1024 + 38 + 40 + 8 = 1110 [bytes/kb]
+ */
+ GNUNET_TRANSPORT_ATS_COST_NETWORK_OVERHEAD = 7,
+
+
+ /* Quality related values */
+ /* ====================== */
+
+ /* Physical layer quality properties */
+
+ /**
+ * Signal strength on physical layer
+ *
+ * Unit: [dBm]
+ */
+ GNUNET_TRANSPORT_ATS_QUALITY_PHY_SIGNAL_STRENGTH = 1025,
+
+ /**
+ * Collision rate on physical layer
+ *
+ * Unit: [B/s]
+ */
+ GNUNET_TRANSPORT_ATS_QUALITY_PHY_COLLISION_RATE = 1026,
+
+ /**
+ * Error rate on physical layer
+ *
+ * Unit: [B/s]
+ */
+ GNUNET_TRANSPORT_ATS_QUALITY_PHY_ERROR_RATE = 1027,
+
+ /* Network layer quality properties */
+
+ /**
+ * Delay
+ * Time between when the time packet is sent and the packet arrives
+ *
+ * Unit: [ms]
+ *
+ * Examples:
+ *
+ * LAN : 1
+ * WLAN : 2
+ * Dialup: 500
+ */
+ GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY = 1028,
+
+ /**
+ * Jitter
+ * Time variations of the delay
+ * 1st derivative of a delay function
+ *
+ * Unit: [ms]
+ */
+ GNUNET_TRANSPORT_ATS_QUALITY_NET_JITTER = 1029,
+
+ /**
+ * Error rate on network layer
+ *
+ * Unit: [B/s]
+ *
+ * Examples:
+ *
+ * LAN : 0
+ * WLAN : 400
+ * Bluetooth : 100
+ * Note: This numbers are just assumptions as an example, not
+ * measured or somehow determined
+ */
+ GNUNET_TRANSPORT_ATS_QUALITY_NET_ERRORRATE = 1030,
+
+ /**
+ * Drop rate on network layer
+ * Bytes actively dismissed by a network component during transmission
+ * Reasons for dropped data can be full queues, congestion, quota violations...
+ *
+ * Unit: [B/s]
+ *
+ * Examples:
+ *
+ * LAN : 0
+ * WLAN : 400
+ * Bluetooth : 100
+ * Note: This numbers are just assumptions as an example, not
+ * measured or somehow determined
+ */
+ GNUNET_TRANSPORT_ATS_QUALITY_NET_DROPRATE = 1031,
+
+ /**
+ * Loss rate on network layer
+ * Bytes lost during transmission
+ * Reasons can be collisions, ...
+ *
+ * Unit: [B/s]
+ *
+ * Examples:
+ *
+ * LAN : 0
+ * WLAN : 40
+ * Bluetooth : 10
+ * Note: This numbers are just assumptions as an example, not measured
+ * or somehow determined
+ */
+ GNUNET_TRANSPORT_ATS_QUALITY_NET_LOSSRATE = 1032,
+
+ /**
+ * Throughput on network layer
+ *
+ * Unit: [kB/s]
+ *
+ * Examples:
+ *
+ * LAN : 3400
+ * WLAN : 1200
+ * Dialup: 4
+ *
+ */
+ GNUNET_TRANSPORT_ATS_QUALITY_NET_THROUGHPUT = 1033,
+
+ /**
+ * Distance on network layer
+ *
+ * Unit: []
+ */
+ GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE = 1034,
+
+
+ /* Availability related values */
+ /* =========================== */
+
+ /**
+ * Is a peer reachable?
+ */
+ GNUNET_TRANSPORT_ATS_AVAILABILITY_REACHABLE = 2048,
+
+ /**
+ * Is there a connection established to a peer using this transport
+ */
+ GNUNET_TRANSPORT_ATS_AVAILABILITY_CONNECTED = 2049
+
+};
+
+
+/**
+ * struct used to communicate the transport's properties like cost and
+ * quality of service as well as high-level constraints on resource
+ * consumption.
+ *
+ * +---+
+ * +-----------+ Constraints | | Plugin properties +---------+
+ * | Highlevel |------------> |ATS| <------------------|Transport|
+ * | Component | ATS struct | | ATS struct | Plugin |
+ * +-----------+ | | +---------+
+ * +---+
+ *
+ * This structure will be used by transport plugins to communicate
+ * costs to ATS or by higher level components to tell ATS their
+ * constraints. Always a pair of (GNUNET_TRANSPORT_ATS_Property,
+ * uint32_t value). Value is always uint32_t, so all units used to
+ * define costs have to be normalized to fit uint32_t.
+ */
+struct GNUNET_TRANSPORT_ATS_Information
+{
+ /**
+ * ATS property type, in network byte order.
+ */
+ uint32_t type;
+
+ /**
+ * ATS property value, in network byte order.
+ */
+ uint32_t value;
+};
+
+
+
projects / oweals / gnunet.git / blobdiff