1 /* Copyright (c) 2013-2015. The SimGrid Team.
2 * All rights reserved. */
4 /* This program is free software; you can redistribute it and/or modify it
5 * under the terms of the license (GNU LGPL) which comes with this package. */
7 #ifndef NETWORK_ROUTING_HPP_
8 #define NETWORK_ROUTING_HPP_
11 #include <xbt/signal.hpp>
13 #include "surf_interface.hpp"
16 XBT_PUBLIC(void) routing_model_create( void *loopback);
26 class XBT_PRIVATE RoutingModelDescription;
27 class XBT_PRIVATE Onelink;
30 /** @ingroup SURF_routing_interface
31 * @brief Network cards are the vertices in the graph representing the network, used to compute paths between nodes.
33 * @details This represents a position in the network. One can route information between two netcards
38 virtual int id()=0; // Our rank in the vertices_ array of our containing AS.
39 virtual void setId(int id)=0;
40 virtual char *name()=0;
41 virtual As *containingAS()=0; // This is the AS in which I am
42 virtual e_surf_network_element_type_t getRcType()=0;
45 /** @ingroup SURF_routing_interface
46 * @brief The Autonomous System (AS) routing interface
52 /** @brief Close that AS: no more content can be added to it */
53 virtual void Seal()=0;
56 char *name_ = nullptr;
57 NetCard *netcard_ = nullptr;
58 As *father_ = nullptr;
59 xbt_dict_t sons_ = xbt_dict_new_homogeneous(NULL);
61 xbt_dynar_t vertices_ = xbt_dynar_new(sizeof(char*),NULL); // our content, as known to our graph routing algorithm (maps vertexId -> vertex)
62 xbt_dict_t bypassRoutes_ = nullptr;
63 e_surf_routing_hierarchy_t hierarchy_ = SURF_ROUTING_NULL;
64 xbt_dynar_t upDownLinks = xbt_dynar_new(sizeof(s_surf_parsing_link_up_down_t),NULL);
69 * @brief Probe the routing path between two points
71 * The networking model uses this function when creating a communication
72 * to retrieve both the list of links that the create communication will use,
73 * and the summed latency that these links represent.
75 * The network could recompute the latency by itself from the list, but it would
76 * require an additional link set traversal. This operation being on the critical
77 * path of SimGrid, the routing computes the latency in behalf of the network.
79 * Things are rather complex here because we have to find the path from ASes to ASes, and within each.
80 * In addition, the different ASes may use differing routing models.
81 * Some ASes may be routed in full, others may have only some connection information and use a shortest path on top of that, and so on.
82 * Some ASes may even not have any predefined links and use only coordinate informations to compute the latency.
84 * So, the path is constructed recursively, with each traversed AS adding its information to the set.
85 * The algorithm for that is explained in http://hal.inria.fr/hal-00650233/
87 * @param src Initial point of the routing path
88 * @param dst Final point of the routing path
89 * @param into Container into which the traversed links should be pushed
90 * @param latency Accumulator in which the latencies should be added (caller must set it to 0)
92 virtual void getRouteAndLatency(NetCard *src, NetCard *dst, sg_platf_route_cbarg_t into, double *latency)=0;
93 /** @brief retrieves the list of all routes of size 1 (of type src x dst x Link) */
94 virtual xbt_dynar_t getOneLinkRoutes()=0;
96 virtual void getGraph(xbt_graph_t graph, xbt_dict_t nodes, xbt_dict_t edges)=0;
98 virtual sg_platf_route_cbarg_t getBypassRoute(NetCard *src, NetCard *dst,double *lat);
100 /* Add content to the AS, at parsing time. It should be sealed afterward. */
101 virtual int addComponent(NetCard *elm); /* A host, a router or an AS, whatever */
102 virtual void parseRoute(sg_platf_route_cbarg_t route);
103 virtual void parseBypassroute(sg_platf_route_cbarg_t e_route);
106 struct XBT_PRIVATE NetCardImpl : public NetCard {
108 NetCardImpl(const char *name, e_surf_network_element_type_t componentType, As *as)
109 : name_(xbt_strdup(name)),
110 componentType_(componentType),
113 ~NetCardImpl() { xbt_free(name_);};
115 int id() override {return id_;}
116 void setId(int id) override {id_ = id;}
117 char *name() override {return name_;}
118 As *containingAS() override {return containingAS_;}
119 e_surf_network_element_type_t getRcType() override {return componentType_;}
123 e_surf_network_element_type_t componentType_;
127 /** @ingroup SURF_routing_interface
128 * @brief Link of lenght 1, alongside with its source and destination. This is mainly usefull in the ns3 bindings
132 Onelink(void *link, NetCard *src, NetCard *dst)
133 : src_(src), dst_(dst), link_(link) {};
139 /** @ingroup SURF_routing_interface
140 * @brief The class representing a whole routing platform
142 XBT_PUBLIC_CLASS RoutingPlatf {
144 RoutingPlatf(void *loopback);
148 xbt_dynar_t lastRoute_ = xbt_dynar_new(sizeof(Link*),NULL);
149 xbt_dynar_t getOneLinkRoutes(void);
150 void getRouteAndLatency(NetCard *src, NetCard *dst, xbt_dynar_t * links, double *latency);
157 XBT_PUBLIC_DATA(simgrid::xbt::signal<void(NetCard*)>) netcardCreatedCallbacks;
158 XBT_PUBLIC_DATA(simgrid::xbt::signal<void(As*)>) asCreatedCallbacks;
163 #endif /* NETWORK_ROUTING_HPP_ */