-#include "surf.hpp"
-#include <float.h>
+/* Copyright (c) 2013-2015. The SimGrid Team.
+ * All rights reserved. */
+
+/* This program is free software; you can redistribute it and/or modify it
+ * under the terms of the license (GNU LGPL) which comes with this package. */
#ifndef NETWORK_ROUTING_HPP_
#define NETWORK_ROUTING_HPP_
-void routing_model_create( void *loopback);
+#include <xbt/base.h>
+#include <xbt/signal.hpp>
+
+#include "surf_interface.hpp"
+#include "src/surf/xml/platf_private.hpp" // FIXME: including this here is pure madness. KILKILKIL XML.
+#include <float.h>
-/* ************************************************************************** */
-/* ************************* GRAPH EXPORTING FUNCTIONS ********************** */
-xbt_node_t new_xbt_graph_node (xbt_graph_t graph, const char *name, xbt_dict_t nodes);
-xbt_edge_t new_xbt_graph_edge (xbt_graph_t graph, xbt_node_t s, xbt_node_t d, xbt_dict_t edges);
+#include <vector>
+#include <map>
+
+SG_BEGIN_DECL()
+XBT_PUBLIC(void) routing_model_create(Link *loopback);
+XBT_PRIVATE xbt_node_t new_xbt_graph_node (xbt_graph_t graph, const char *name, xbt_dict_t nodes);
+XBT_PRIVATE xbt_edge_t new_xbt_graph_edge (xbt_graph_t graph, xbt_node_t s, xbt_node_t d, xbt_dict_t edges);
+SG_END_DECL()
+
+namespace simgrid {
+namespace surf {
/***********
* Classes *
***********/
+
class As;
-typedef As *AsPtr;
+class XBT_PRIVATE RoutingModelDescription;
+class XBT_PRIVATE Onelink;
+class RoutingPlatf;
-class RoutingModelDescription;
-typedef RoutingModelDescription *RoutingModelDescriptionPtr;
+/** @ingroup SURF_routing_interface
+ * @brief Network cards are the vertices in the graph representing the network, used to compute paths between nodes.
+ *
+ * @details This represents a position in the network. One can route information between two netcards
+ */
+class NetCard {
+public:
+ virtual ~NetCard(){};
+ virtual int id()=0; // Our rank in the vertices_ array of our containing AS.
+ virtual void setId(int id)=0;
+ virtual char *name()=0;
+ virtual As *containingAS()=0; // This is the AS in which I am
+ virtual bool isAS()=0;
+ virtual bool isHost()=0;
+ virtual bool isRouter()=0;
+};
-class RoutingEdge;
-typedef RoutingEdge *RoutingEdgePtr;
+/** @ingroup SURF_routing_interface
+ * @brief Network Autonomous System (AS)
+ */
+class As {
+public:
+ As(const char*name);
+ /** @brief Close that AS: no more content can be added to it */
+ virtual void Seal();
+ virtual ~As();
-class Onelink;
-typedef Onelink *OnelinkPtr;
+ e_surf_routing_hierarchy_t hierarchy_ = SURF_ROUTING_NULL;
+ xbt_dynar_t upDownLinks = xbt_dynar_new(sizeof(s_surf_parsing_link_up_down_t),NULL);
-class RoutingPlatf;
-typedef RoutingPlatf *RoutingPlatfPtr;
+ char *name_ = nullptr;
+ NetCard *netcard_ = nullptr; // Our representative in the father AS
+ As *father_ = nullptr;
+ xbt_dict_t children_ = xbt_dict_new_homogeneous(NULL); // sub-ASes
+ xbt_dynar_t vertices_ = xbt_dynar_new(sizeof(char*),NULL); // our content, as known to our graph routing algorithm (maps vertexId -> vertex)
+private:
+ bool sealed_ = false; // We cannot add more content when sealed
-/*FIXME:class RoutingModelDescription {
- const char *p_name;
- const char *p_desc;
- AsPtr create();
- void end(AsPtr as);
-};*/
+ friend RoutingPlatf;
+ std::map<std::pair<std::string, std::string>, std::vector<Link*>*> bypassRoutes_; // srcName x dstName -> route
+ static void getRouteRecursive(NetCard *src, NetCard *dst, /* OUT */ std::vector<Link*> * links, double *latency);
+ std::vector<Link*> *getBypassRoute(NetCard *src, NetCard *dst);
-class As {
public:
- xbt_dynar_t p_indexNetworkElm;
- xbt_dict_t p_bypassRoutes; /* store bypass routes */
- routing_model_description_t p_modelDesc;
- e_surf_routing_hierarchy_t p_hierarchy;
- char *p_name;
- AsPtr p_routingFather;
- xbt_dict_t p_routingSons;
- RoutingEdgePtr p_netElem;
- xbt_dynar_t p_linkUpDownList;
-
- As(){};
- virtual ~As(){};
-
- virtual void getRouteAndLatency(RoutingEdgePtr src, RoutingEdgePtr dst, sg_platf_route_cbarg_t into, double *latency)=0;
- virtual xbt_dynar_t getOneLinkRoutes()=0;
+ /**
+ * @brief Probe the routing path between two points
+ *
+ * The networking model uses this function when creating a communication
+ * to retrieve both the list of links that the create communication will use,
+ * and the summed latency that these links represent.
+ *
+ * The network could recompute the latency by itself from the list, but it would
+ * require an additional link set traversal. This operation being on the critical
+ * path of SimGrid, the routing computes the latency in behalf of the network.
+ *
+ * Things are rather complex here because we have to find the path from ASes to ASes, and within each.
+ * In addition, the different ASes may use differing routing models.
+ * 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.
+ * Some ASes may even not have any predefined links and use only coordinate informations to compute the latency.
+ *
+ * So, the path is constructed recursively, with each traversed AS adding its information to the set.
+ * The algorithm for that is explained in http://hal.inria.fr/hal-00650233/
+ *
+ * @param src Initial point of the routing path
+ * @param dst Final point of the routing path
+ * @param into Container into which the traversed links should be pushed
+ * @param latency Accumulator in which the latencies should be added (caller must set it to 0)
+ */
+ virtual void getRouteAndLatency(NetCard *src, NetCard *dst, sg_platf_route_cbarg_t into, double *latency)=0;
+ /** @brief retrieves the list of all routes of size 1 (of type src x dst x Link) */
+ virtual xbt_dynar_t getOneLinkRoutes();
+
virtual void getGraph(xbt_graph_t graph, xbt_dict_t nodes, xbt_dict_t edges)=0;
- virtual sg_platf_route_cbarg_t getBypassRoute(RoutingEdgePtr src, RoutingEdgePtr dst, double *lat)=0;
- /* The parser calls the following functions to inform the routing models
- * that a new element is added to the AS currently built.
- *
- * Of course, only the routing model of this AS is informed, not every ones */
- virtual int parsePU(RoutingEdgePtr elm)=0; /* A host or a router, whatever */
- virtual int parseAS( RoutingEdgePtr elm)=0;
- virtual void parseRoute(sg_platf_route_cbarg_t route)=0;
- virtual void parseASroute(sg_platf_route_cbarg_t route)=0;
- virtual void parseBypassroute(sg_platf_route_cbarg_t e_route)=0;
+ /* Add content to the AS, at parsing time. It should be sealed afterward. */
+ virtual int addComponent(NetCard *elm); /* A host, a router or an AS, whatever */
+ virtual void addRoute(sg_platf_route_cbarg_t route);
+ void addBypassRoute(sg_platf_route_cbarg_t e_route);
+
};
-class RoutingEdge {
+struct XBT_PRIVATE NetCardImpl : public NetCard {
public:
- AsPtr p_rcComponent;
- e_surf_network_element_type_t p_rcType;
- int m_id;
- char *p_name;
+ NetCardImpl(const char *name, e_surf_network_element_type_t componentType, As *as)
+ : name_(xbt_strdup(name)),
+ componentType_(componentType),
+ containingAS_(as)
+ {}
+ ~NetCardImpl() { xbt_free(name_);};
+
+ int id() override {return id_;}
+ void setId(int id) override {id_ = id;}
+ char *name() override {return name_;}
+ As *containingAS() override {return containingAS_;}
+
+ bool isAS() override {return componentType_ == SURF_NETWORK_ELEMENT_AS;}
+ bool isHost() override {return componentType_ == SURF_NETWORK_ELEMENT_HOST;}
+ bool isRouter() override {return componentType_ == SURF_NETWORK_ELEMENT_ROUTER;}
+
+private:
+ int id_ = -1;
+ char *name_;
+ e_surf_network_element_type_t componentType_;
+ As *containingAS_;
};
-/*
- * Link of lenght 1, alongside with its source and destination. This is mainly usefull in the bindings to gtnets and ns3
+/** @ingroup SURF_routing_interface
+ * @brief Link of length 1, alongside with its source and destination. This is mainly useful in the ns3 bindings
*/
class Onelink {
public:
- Onelink(void *link, RoutingEdgePtr src, RoutingEdgePtr dst)
- : p_src(src), p_dst(dst), p_link(link) {};
- RoutingEdgePtr p_src;
- RoutingEdgePtr p_dst;
- void *p_link;
+ Onelink(void *link, NetCard *src, NetCard *dst)
+ : src_(src), dst_(dst), link_(link) {};
+ NetCard *src_;
+ NetCard *dst_;
+ void *link_;
};
-class RoutingPlatf {
+/** @ingroup SURF_routing_interface
+ * @brief The class representing a whole routing platform
+ */
+XBT_PUBLIC_CLASS RoutingPlatf {
public:
- AsPtr p_root;
- void *p_loopback;
- xbt_dynar_t p_lastRoute;
+ RoutingPlatf(Link *loopback);
+ ~RoutingPlatf();
+ As *root_ = nullptr;
+ Link *loopback_;
xbt_dynar_t getOneLinkRoutes(void);
- xbt_dynar_t recursiveGetOneLinkRoutes(AsPtr rc);
- void getRouteAndLatency(RoutingEdgePtr src, RoutingEdgePtr dst, xbt_dynar_t * links, double *latency);
+ void getRouteAndLatency(NetCard *src, NetCard *dst, std::vector<Link*> * links, double *latency);
};
+/*************
+ * Callbacks *
+ *************/
+
+XBT_PUBLIC_DATA(simgrid::xbt::signal<void(NetCard*)>) netcardCreatedCallbacks;
+XBT_PUBLIC_DATA(simgrid::xbt::signal<void(As*)>) asCreatedCallbacks;
+
+}
+}
+
#endif /* NETWORK_ROUTING_HPP_ */
