Logo AND Algorithmique Numérique Distribuée

Public GIT Repository
5a026eef915f1ac3e792d8d37b3ef74010144809
[simgrid.git] / src / surf / surf_routing.c
1 /* Copyright (c) 2009, 2010, 2011. The SimGrid Team.
2  * All rights reserved.                                                     */
3
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. */
6
7 #include <pcre.h>               /* regular expression library */
8
9 #include "simgrid/platf_interface.h"    // platform creation API internal interface
10
11 #include "surf_routing_private.h"
12 #include "surf/surf_routing.h"
13 #include "surf/surfxml_parse_values.h"
14
15 /**
16  * @ingroup SURF_build_api
17  * @brief A library containing all known workstations
18  */
19 xbt_lib_t host_lib;
20
21 int ROUTING_HOST_LEVEL;         //Routing level
22 int SURF_CPU_LEVEL;             //Surf cpu level
23 int SURF_WKS_LEVEL;             //Surf workstation level
24 int SIMIX_HOST_LEVEL;           //Simix level
25 int MSG_HOST_LEVEL;             //Msg level
26 int SD_HOST_LEVEL;              //Simdag level
27 int COORD_HOST_LEVEL=0;         //Coordinates level
28 int NS3_HOST_LEVEL;             //host node for ns3
29
30 xbt_dict_t watched_hosts_lib;
31
32 /**
33  * @ingroup SURF_build_api
34  * @brief A library containing all known links
35  */
36 xbt_lib_t link_lib;
37 int SD_LINK_LEVEL;              //Simdag level
38 int SURF_LINK_LEVEL;            //Surf level
39 int NS3_LINK_LEVEL;             //link for ns3
40
41 xbt_lib_t as_router_lib;
42 int ROUTING_ASR_LEVEL;          //Routing level
43 int COORD_ASR_LEVEL;            //Coordinates level
44 int NS3_ASR_LEVEL;              //host node for ns3
45
46 static xbt_dict_t random_value = NULL;
47
48 /** @brief Retrieve a routing edge from its name
49  *
50  * Routing edges are either CPU/workstation and routers, whatever
51  */
52 sg_routing_edge_t sg_routing_edge_by_name_or_null(const char *name) {
53     sg_routing_edge_t net_elm = xbt_lib_get_or_null(host_lib, name, ROUTING_HOST_LEVEL);
54     if(!net_elm) net_elm = xbt_lib_get_or_null(as_router_lib, name, ROUTING_ASR_LEVEL);
55   return net_elm;
56 }
57
58 /* Global vars */
59 routing_platf_t routing_platf = NULL;
60 AS_t current_routing = NULL;
61
62 /* global parse functions */
63 xbt_dynar_t parsed_link_list = NULL;   /* temporary store of current list link of a route */
64 extern xbt_dynar_t mount_list;
65
66 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_route, surf, "Routing part of surf");
67
68 static void routing_parse_peer(sg_platf_peer_cbarg_t peer);     /* peer bypass */
69 static void routing_parse_Srandom(void);        /* random bypass */
70
71 static void routing_parse_postparse(void);
72
73 /* this lines are only for replace use like index in the model table */
74 typedef enum {
75   SURF_MODEL_FULL = 0,
76   SURF_MODEL_FLOYD,
77   SURF_MODEL_DIJKSTRA,
78   SURF_MODEL_DIJKSTRACACHE,
79   SURF_MODEL_NONE,
80   SURF_MODEL_RULEBASED,
81   SURF_MODEL_VIVALDI,
82   SURF_MODEL_CLUSTER
83 } e_routing_types;
84
85 struct s_model_type routing_models[] = {
86   {"Full",
87    "Full routing data (fast, large memory requirements, fully expressive)",
88    model_full_create, model_full_end},
89   {"Floyd",
90    "Floyd routing data (slow initialization, fast lookup, lesser memory requirements, shortest path routing only)",
91    model_floyd_create, model_floyd_end},
92   {"Dijkstra",
93    "Dijkstra routing data (fast initialization, slow lookup, small memory requirements, shortest path routing only)",
94    model_dijkstra_create, model_dijkstra_both_end},
95   {"DijkstraCache",
96    "Dijkstra routing data (fast initialization, fast lookup, small memory requirements, shortest path routing only)",
97    model_dijkstracache_create, model_dijkstra_both_end},
98   {"none", "No routing (Unless you know what you are doing, avoid using this mode in combination with a non Constant network model).",
99    model_none_create,  NULL},
100   {"RuleBased", "Rule-Based routing data (...)",
101    model_rulebased_create, NULL},
102   {"Vivaldi", "Vivaldi routing",
103    model_vivaldi_create, NULL},
104   {"Cluster", "Cluster routing",
105    model_cluster_create, NULL},
106   {NULL, NULL, NULL, NULL}
107 };
108
109 /**
110  * \brief Add a "host_link" to the network element list
111  */
112 static void parse_S_host_link(sg_platf_host_link_cbarg_t host)
113 {
114   sg_routing_edge_t info = NULL;
115   info = xbt_lib_get_or_null(host_lib, host->id, ROUTING_HOST_LEVEL);
116   xbt_assert(info, "Host '%s' not found!",host->id);
117   xbt_assert(current_routing->model_desc == &routing_models[SURF_MODEL_CLUSTER] ||
118       current_routing->model_desc == &routing_models[SURF_MODEL_VIVALDI],
119       "You have to be in model Cluster to use tag host_link!");
120
121   s_surf_parsing_link_up_down_t link_up_down;
122   link_up_down.link_up = xbt_lib_get_or_null(link_lib, host->link_up, SURF_LINK_LEVEL);
123   link_up_down.link_down = xbt_lib_get_or_null(link_lib, host->link_down, SURF_LINK_LEVEL);
124
125   xbt_assert(link_up_down.link_up, "Link '%s' not found!",host->link_up);
126   xbt_assert(link_up_down.link_down, "Link '%s' not found!",host->link_down);
127
128   if(!current_routing->link_up_down_list)
129     current_routing->link_up_down_list = xbt_dynar_new(sizeof(s_surf_parsing_link_up_down_t),NULL);
130
131   // If dynar is is greater than edge id and if the host_link is already defined
132   if(xbt_dynar_length(current_routing->link_up_down_list) > info->id &&
133       xbt_dynar_get_as(current_routing->link_up_down_list,info->id,void*))
134     xbt_die("Host_link for '%s' is already defined!",host->id);
135
136   XBT_DEBUG("Push Host_link for host '%s' to position %d",info->name,info->id);
137   xbt_dynar_set_as(current_routing->link_up_down_list,info->id,s_surf_parsing_link_up_down_t,link_up_down);
138 }
139
140 /**
141  * \brief Add a "host" to the network element list
142  */
143 static void parse_S_host(sg_platf_host_cbarg_t host)
144 {
145   sg_routing_edge_t info = NULL;
146   if (current_routing->hierarchy == SURF_ROUTING_NULL)
147     current_routing->hierarchy = SURF_ROUTING_BASE;
148   xbt_assert(!xbt_lib_get_or_null(host_lib, host->id, ROUTING_HOST_LEVEL),
149              "Reading a host, processing unit \"%s\" already exists", host->id);
150
151   info = xbt_new0(s_network_element_t, 1);
152   info->rc_component = current_routing;
153   info->rc_type = SURF_NETWORK_ELEMENT_HOST;
154   info->name = xbt_strdup(host->id);
155   info->id = current_routing->parse_PU(current_routing, (void *) info);
156   xbt_lib_set(host_lib, host->id, ROUTING_HOST_LEVEL, (void *) info);
157   XBT_DEBUG("Having set name '%s' id '%d'",host->id,info->id);
158
159   if(mount_list){
160     xbt_lib_set(storage_lib, host->id, ROUTING_STORAGE_HOST_LEVEL, (void *) mount_list);
161     mount_list = NULL;
162   }
163
164   if (host->coord && strcmp(host->coord, "")) {
165     unsigned int cursor;
166     char*str;
167
168     if (!COORD_HOST_LEVEL)
169       xbt_die ("To use host coordinates, please add --cfg=network/coordinates:yes to your command line");
170     /* Pre-parse the host coordinates -- FIXME factorize with routers by overloading the routing->parse_PU function*/
171     xbt_dynar_t ctn_str = xbt_str_split_str(host->coord, " ");
172     xbt_dynar_t ctn = xbt_dynar_new(sizeof(double),NULL);
173     xbt_dynar_foreach(ctn_str,cursor, str) {
174       double val = atof(str);
175       xbt_dynar_push(ctn,&val);
176     }
177     xbt_dynar_shrink(ctn, 0);
178     xbt_dynar_free(&ctn_str);
179     xbt_lib_set(host_lib, host->id, COORD_HOST_LEVEL, (void *) ctn);
180     XBT_DEBUG("Having set host coordinates for '%s'",host->id);
181   }
182 }
183
184 /**
185  * \brief Add a "router" to the network element list
186  */
187 static void parse_S_router(sg_platf_router_cbarg_t router)
188 {
189   sg_routing_edge_t info = NULL;
190   if (current_routing->hierarchy == SURF_ROUTING_NULL)
191     current_routing->hierarchy = SURF_ROUTING_BASE;
192   xbt_assert(!xbt_lib_get_or_null(as_router_lib, router->id, ROUTING_ASR_LEVEL),
193              "Reading a router, processing unit \"%s\" already exists",
194              router->id);
195
196   info = xbt_new0(s_network_element_t, 1);
197   info->rc_component = current_routing;
198   info->rc_type = SURF_NETWORK_ELEMENT_ROUTER;
199   info->name = xbt_strdup(router->id);
200   info->id = current_routing->parse_PU(current_routing, (void *) info);
201   xbt_lib_set(as_router_lib, router->id, ROUTING_ASR_LEVEL, (void *) info);
202   XBT_DEBUG("Having set name '%s' id '%d'",router->id,info->id);
203
204   if (router->coord && strcmp(router->coord, "")) {
205     unsigned int cursor;
206     char*str;
207
208     if (!COORD_ASR_LEVEL)
209       xbt_die ("To use host coordinates, please add --cfg=network/coordinates:yes to your command line");
210     /* Pre-parse the host coordinates */
211     xbt_dynar_t ctn_str = xbt_str_split_str(router->coord, " ");
212     xbt_dynar_t ctn = xbt_dynar_new(sizeof(double),NULL);
213     xbt_dynar_foreach(ctn_str,cursor, str) {
214       double val = atof(str);
215       xbt_dynar_push(ctn,&val);
216     }
217     xbt_dynar_shrink(ctn, 0);
218     xbt_dynar_free(&ctn_str);
219     xbt_lib_set(as_router_lib, router->id, COORD_ASR_LEVEL, (void *) ctn);
220     XBT_DEBUG("Having set router coordinates for '%s'",router->id);
221   }
222 }
223
224 /**
225  * \brief Store the route by calling the set_route function of the current routing component
226  */
227 static void parse_E_route(sg_platf_route_cbarg_t route)
228 {
229   route_t created_route = xbt_new0(s_route_t, 1);
230   created_route->link_list = parsed_link_list;
231
232   xbt_assert(current_routing->parse_route,
233              "no defined method \"set_route\" in \"%s\"",
234              current_routing->name);
235
236   current_routing->parse_route(current_routing,
237       route->src, route->dst, created_route);
238   generic_free_route(created_route);
239   parsed_link_list = NULL;
240 }
241
242 /**
243  * \brief Store the ASroute by calling the set_ASroute function of the current routing component
244  */
245 static void parse_E_ASroute(sg_platf_ASroute_cbarg_t ASroute)
246 {
247   route_t e_route = xbt_new0(s_route_t, 1);
248   e_route->link_list = parsed_link_list;
249
250   if (!strcmp(current_routing->model_desc->name,"RuleBased")) {
251     // DIRTY PERL HACK AHEAD: with the rulebased routing, the {src,dst}_gateway fields
252     // store the provided name instead of the entity directly (model_rulebased_parse_ASroute knows)
253     //
254     // This is because the user will provide something like "^AS_(.*)$" instead of the proper name of a given entity
255     e_route->src_gateway = (sg_routing_edge_t) ASroute->gw_src;
256     e_route->dst_gateway = (sg_routing_edge_t) ASroute->gw_dst;
257   } else {
258     e_route->src_gateway = sg_routing_edge_by_name_or_null(ASroute->gw_src);
259     e_route->dst_gateway = sg_routing_edge_by_name_or_null(ASroute->gw_dst);
260   }
261   xbt_assert(current_routing->parse_ASroute,
262              "no defined method \"set_ASroute\" in \"%s\"",
263              current_routing->name);
264   current_routing->parse_ASroute(current_routing, ASroute->src, ASroute->dst, e_route);
265   generic_free_route(e_route);
266   parsed_link_list = NULL;
267 }
268
269 /**
270  * \brief Store the bypass route by calling the set_bypassroute function of the current routing component
271  */
272 static void parse_E_bypassRoute(sg_platf_bypassRoute_cbarg_t route)
273 {
274   route_t e_route = xbt_new0(s_route_t, 1);
275   e_route->link_list = parsed_link_list;
276
277   xbt_assert(current_routing->parse_bypassroute,
278              "Bypassing mechanism not implemented by routing '%s'",
279              current_routing->name);
280
281   current_routing->parse_bypassroute(current_routing, route->src, route->dst, e_route);
282   parsed_link_list = NULL;
283 }
284
285 /**
286  * \brief Store the bypass route by calling the set_bypassroute function of the current routing component
287  */
288 static void parse_E_bypassASroute(sg_platf_bypassASroute_cbarg_t ASroute)
289 {
290   route_t e_route = xbt_new0(s_route_t, 1);
291   e_route->link_list = parsed_link_list;
292   e_route->src_gateway = sg_routing_edge_by_name_or_null(ASroute->gw_src);
293   e_route->dst_gateway = sg_routing_edge_by_name_or_null(ASroute->gw_dst);
294   xbt_assert(current_routing->parse_bypassroute,
295              "Bypassing mechanism not implemented by routing '%s'",
296              current_routing->name);
297   current_routing->parse_bypassroute(current_routing, ASroute->src, ASroute->dst, e_route);
298   parsed_link_list = NULL;
299 }
300
301 /**
302  * \brief Set a new link on the actual list of link for a route or ASroute from XML
303  */
304
305 static void routing_parse_link_ctn(sg_platf_linkctn_cbarg_t linkctn)
306 {
307   char *link_id;
308   switch (linkctn->direction) {
309   case SURF_LINK_DIRECTION_NONE:
310     link_id = xbt_strdup(linkctn->id);
311     break;
312   case SURF_LINK_DIRECTION_UP:
313     link_id = bprintf("%s_UP", linkctn->id);
314     break;
315   case SURF_LINK_DIRECTION_DOWN:
316     link_id = bprintf("%s_DOWN", linkctn->id);
317     break;
318   }
319
320   if(parsed_link_list == NULL)
321     parsed_link_list = xbt_dynar_new(sizeof(char *), &xbt_free_ref);
322
323   xbt_dynar_push(parsed_link_list, &link_id);
324 }
325
326 /**
327  * \brief Make a new routing component to the platform
328  *
329  * Add a new autonomous system to the platform. Any elements (such as host,
330  * router or sub-AS) added after this call and before the corresponding call
331  * to sg_platf_new_AS_close() will be added to this AS.
332  *
333  * Once this function was called, the configuration concerning the used
334  * models cannot be changed anymore.
335  *
336  * @param AS_id name of this autonomous system. Must be unique in the platform
337  * @param wanted_routing_type one of Full, Floyd, Dijkstra or similar. Full list in the variable routing_models, in src/surf/surf_routing.c
338  */
339 void routing_AS_begin(const char *AS_id, int wanted_routing_type)
340 {
341   AS_t new_as;
342   routing_model_description_t model = NULL;
343
344   xbt_assert(!xbt_lib_get_or_null
345              (as_router_lib, AS_id, ROUTING_ASR_LEVEL),
346              "The AS \"%s\" already exists", AS_id);
347
348   /* search the routing model */
349   switch(wanted_routing_type){
350     case A_surfxml_AS_routing_Cluster:       model = &routing_models[SURF_MODEL_CLUSTER];break;
351     case A_surfxml_AS_routing_Dijkstra:      model = &routing_models[SURF_MODEL_DIJKSTRA];break;
352     case A_surfxml_AS_routing_DijkstraCache: model = &routing_models[SURF_MODEL_DIJKSTRACACHE];break;
353     case A_surfxml_AS_routing_Floyd:         model = &routing_models[SURF_MODEL_FLOYD];break;
354     case A_surfxml_AS_routing_Full:          model = &routing_models[SURF_MODEL_FULL];break;
355     case A_surfxml_AS_routing_None:          model = &routing_models[SURF_MODEL_NONE];break;
356     case A_surfxml_AS_routing_RuleBased:     model = &routing_models[SURF_MODEL_RULEBASED];break;
357     case A_surfxml_AS_routing_Vivaldi:       model = &routing_models[SURF_MODEL_VIVALDI];break;
358   }
359
360   /* make a new routing component */
361   new_as = (AS_t) model->create();
362   new_as->model_desc = model;
363   new_as->hierarchy = SURF_ROUTING_NULL;
364   new_as->name = xbt_strdup(AS_id);
365
366   sg_routing_edge_t info = NULL;
367   info = xbt_new0(s_network_element_t, 1);
368
369   if (current_routing == NULL && routing_platf->root == NULL) {
370
371     /* it is the first one */
372     new_as->routing_father = NULL;
373     routing_platf->root = new_as;
374     info->id = -1;
375   } else if (current_routing != NULL && routing_platf->root != NULL) {
376
377     xbt_assert(!xbt_dict_get_or_null
378                (current_routing->routing_sons, AS_id),
379                "The AS \"%s\" already exists", AS_id);
380     /* it is a part of the tree */
381     new_as->routing_father = current_routing;
382     /* set the father behavior */
383     if (current_routing->hierarchy == SURF_ROUTING_NULL)
384       current_routing->hierarchy = SURF_ROUTING_RECURSIVE;
385     /* add to the sons dictionary */
386     xbt_dict_set(current_routing->routing_sons, AS_id,
387                  (void *) new_as, NULL);
388     /* add to the father element list */
389     info->id = current_routing->parse_AS(current_routing, (void *) info);
390   } else {
391     THROWF(arg_error, 0, "All defined components must be belong to a AS");
392   }
393
394   info->rc_component = new_as->routing_father;
395   info->rc_type = SURF_NETWORK_ELEMENT_AS;
396   info->name = new_as->name;
397
398   xbt_lib_set(as_router_lib, new_as->name, ROUTING_ASR_LEVEL,
399               (void *) info);
400   XBT_DEBUG("Having set name '%s' id '%d'",new_as->name,info->id);
401
402   /* set the new current component of the tree */
403   current_routing = new_as;
404   current_routing->net_elem = info;
405
406 }
407
408 /**
409  * \brief Specify that the current description of AS is finished
410  *
411  * Once you've declared all the content of your AS, you have to close
412  * it with this call. Your AS is not usable until you call this function.
413  *
414  * @fixme: this call is not as robust as wanted: bad things WILL happen
415  * if you call it twice for the same AS, or if you forget calling it, or
416  * even if you add stuff to a closed AS
417  *
418  */
419 void routing_AS_end()
420 {
421
422   if (current_routing == NULL) {
423     THROWF(arg_error, 0, "Close an AS, but none was under construction");
424   } else {
425     if (current_routing->model_desc->end)
426       current_routing->model_desc->end(current_routing);
427     current_routing = current_routing->routing_father;
428   }
429 }
430
431 /* Aux Business methods */
432
433 /**
434  * \brief Get the AS father and the first elements of the chain
435  *
436  * \param src the source host name 
437  * \param dst the destination host name
438  * 
439  * Get the common father of the to processing units, and the first different 
440  * father in the chain
441  */
442 static void elements_father(sg_routing_edge_t src, sg_routing_edge_t dst,
443                             AS_t * res_father,
444                             AS_t * res_src,
445                             AS_t * res_dst)
446 {
447   xbt_assert(src && dst, "bad parameters for \"elements_father\" method");
448 #define ELEMENTS_FATHER_MAXDEPTH 16     /* increase if it is not enough */
449   AS_t src_as, dst_as;
450   AS_t path_src[ELEMENTS_FATHER_MAXDEPTH];
451   AS_t path_dst[ELEMENTS_FATHER_MAXDEPTH];
452   int index_src = 0;
453   int index_dst = 0;
454   AS_t current;
455   AS_t current_src;
456   AS_t current_dst;
457   AS_t father;
458
459   /* (1) find the as where the src and dst are located */
460   sg_routing_edge_t src_data = src;
461   sg_routing_edge_t dst_data = dst;
462   src_as = src_data->rc_component;
463   dst_as = dst_data->rc_component;
464 #ifndef NDEBUG
465   char* src_name = src_data->name;
466   char* dst_name = dst_data->name;
467 #endif
468
469   xbt_assert(src_as && dst_as,
470              "Ask for route \"from\"(%s) or \"to\"(%s) no found", src_name, dst_name);
471
472   /* (2) find the path to the root routing component */
473   for (current = src_as; current != NULL; current = current->routing_father) {
474     if (index_src >= ELEMENTS_FATHER_MAXDEPTH)
475       xbt_die("ELEMENTS_FATHER_MAXDEPTH should be increased for path_src");
476     path_src[index_src++] = current;
477   }
478   for (current = dst_as; current != NULL; current = current->routing_father) {
479     if (index_dst >= ELEMENTS_FATHER_MAXDEPTH)
480       xbt_die("ELEMENTS_FATHER_MAXDEPTH should be increased for path_dst");
481     path_dst[index_dst++] = current;
482   }
483
484   /* (3) find the common father */
485   do {
486     current_src = path_src[--index_src];
487     current_dst = path_dst[--index_dst];
488   } while (index_src > 0 && index_dst > 0 && current_src == current_dst);
489
490   /* (4) they are not in the same routing component, make the path */
491   if (current_src == current_dst)
492     father = current_src;
493   else
494     father = path_src[index_src + 1];
495
496   /* (5) result generation */
497   *res_father = father;         /* first the common father of src and dst */
498   *res_src = current_src;       /* second the first different father of src */
499   *res_dst = current_dst;       /* three  the first different father of dst */
500
501 #undef ELEMENTS_FATHER_MAXDEPTH
502 }
503
504 /* Global Business methods */
505
506 /**
507  * \brief Recursive function for get_route_latency
508  *
509  * \param src the source host name 
510  * \param dst the destination host name
511  * \param *route the route where the links are stored. It is either NULL or a ready to use dynar
512  * \param *latency the latency, if needed
513  * 
514  * This function is called by "get_route" and "get_latency". It allows to walk
515  * recursively through the ASes tree.
516  */
517 static void _get_route_and_latency(sg_routing_edge_t src, sg_routing_edge_t dst,
518                                    xbt_dynar_t * links, double *latency)
519 {
520   s_route_t route;
521   memset(&route,0,sizeof(route));
522
523   XBT_DEBUG("Solve route/latency  \"%s\" to \"%s\"", src->name, dst->name);
524   xbt_assert(src && dst, "bad parameters for \"_get_route_latency\" method");
525
526   /* Find how src and dst are interconnected */
527   AS_t common_father, src_father, dst_father;
528   elements_father(src, dst, &common_father, &src_father, &dst_father);
529   XBT_DEBUG("elements_father: common father '%s' src_father '%s' dst_father '%s'",
530       common_father->name,src_father->name,dst_father->name);
531
532   /* Check whether a direct bypass is defined */
533   route_t e_route_bypass = NULL;
534   if (common_father->get_bypass_route)
535     e_route_bypass = common_father->get_bypass_route(common_father, src, dst, latency);
536
537   /* Common ancestor is kind enough to declare a bypass route from src to dst -- use it and bail out */
538   if (e_route_bypass) {
539     xbt_dynar_merge(links, &e_route_bypass->link_list);
540     generic_free_route(e_route_bypass);
541     return;
542   }
543
544   /* If src and dst are in the same AS, life is good */
545   if (src_father == dst_father) {       /* SURF_ROUTING_BASE */
546     route.link_list = *links;
547     common_father->get_route_and_latency(common_father, src, dst, &route,latency);
548     // if vivaldi latency+=vivaldi(src,dst)
549     return;
550   }
551
552   /* Not in the same AS, no bypass. We'll have to find our path between the ASes recursively*/
553
554   route.link_list = xbt_dynar_new(sizeof(sg_routing_link_t), NULL);
555   // Find the net_card corresponding to father
556   sg_routing_edge_t src_father_net_elm = src_father->net_elem;
557   sg_routing_edge_t dst_father_net_elm = dst_father->net_elem;
558
559   common_father->get_route_and_latency(common_father,
560                                        src_father_net_elm, dst_father_net_elm,
561                                        &route, latency);
562
563   xbt_assert((route.src_gateway != NULL) && (route.dst_gateway != NULL),
564       "bad gateways for route from \"%s\" to \"%s\"", src->name, dst->name);
565
566   sg_routing_edge_t src_gateway_net_elm = route.src_gateway;
567   sg_routing_edge_t dst_gateway_net_elm = route.dst_gateway;
568
569   /* If source gateway is not our source, we have to recursively find our way up to this point */
570   if (src != src_gateway_net_elm)
571     _get_route_and_latency(src, src_gateway_net_elm, links, latency);
572   xbt_dynar_merge(links, &route.link_list);
573
574   /* If dest gateway is not our destination, we have to recursively find our way from this point */
575   if (dst_gateway_net_elm != dst)
576     _get_route_and_latency(dst_gateway_net_elm, dst, links, latency);
577
578   // if vivaldi latency+=vivaldi(src_gateway,dst_gateway)
579 }
580
581 /**
582  * \brief Find a route between hosts
583  *
584  * \param src the network_element_t for src host
585  * \param dst the network_element_t for dst host
586  * \param route where to store the list of links.
587  *              If *route=NULL, create a short lived dynar. Else, fill the provided dynar
588  * \param latency where to store the latency experienced on the path (or NULL if not interested)
589  *                It is the caller responsability to initialize latency to 0 (we add to provided route)
590  * \pre route!=NULL
591  *
592  * walk through the routing components tree and find a route between hosts
593  * by calling the differents "get_route" functions in each routing component.
594  */
595 void routing_get_route_and_latency(sg_routing_edge_t src,
596                                    sg_routing_edge_t dst,
597                                    xbt_dynar_t * route, double *latency)
598 {
599   XBT_DEBUG("routing_get_route_and_latency from %s to %s",src->name,dst->name);
600   if (!*route) {
601     xbt_dynar_reset(routing_platf->last_route);
602     *route = routing_platf->last_route;
603   }
604
605   _get_route_and_latency(src, dst, route, latency);
606
607   xbt_assert(!latency || *latency >= 0.0,
608              "negative latency on route between \"%s\" and \"%s\"", src->name, dst->name);
609 }
610
611 static xbt_dynar_t recursive_get_onelink_routes(AS_t rc)
612 {
613   xbt_dynar_t ret = xbt_dynar_new(sizeof(onelink_t), xbt_free);
614
615   //adding my one link routes
616   xbt_dynar_t onelink_mine = rc->get_onelink_routes(rc);
617   if (onelink_mine)
618     xbt_dynar_merge(&ret,&onelink_mine);
619
620   //recursing
621   char *key;
622   xbt_dict_cursor_t cursor = NULL;
623   AS_t rc_child;
624   xbt_dict_foreach(rc->routing_sons, cursor, key, rc_child) {
625     xbt_dynar_t onelink_child = recursive_get_onelink_routes(rc_child);
626     if (onelink_child)
627       xbt_dynar_merge(&ret,&onelink_child);
628   }
629   return ret;
630 }
631
632 static xbt_dynar_t get_onelink_routes(void)
633 {
634   return recursive_get_onelink_routes(routing_platf->root);
635 }
636
637 e_surf_network_element_type_t routing_get_network_element_type(const char *name)
638 {
639   sg_routing_edge_t rc = sg_routing_edge_by_name_or_null(name);
640   if (rc)
641     return rc->rc_type;
642
643   return SURF_NETWORK_ELEMENT_NULL;
644 }
645
646 /**
647  * \brief Generic method: create the global routing schema
648  * 
649  * Make a global routing structure and set all the parsing functions.
650  */
651 void routing_model_create( void *loopback)
652 {
653   /* config the uniq global routing */
654   routing_platf = xbt_new0(s_routing_platf_t, 1);
655   routing_platf->root = NULL;
656   routing_platf->get_onelink_routes = get_onelink_routes;
657   routing_platf->loopback = loopback;
658   routing_platf->last_route = xbt_dynar_new(sizeof(sg_routing_link_t),NULL);
659   /* no current routing at moment */
660   current_routing = NULL;
661 }
662
663
664 /* ************************************************** */
665 /* ********** PATERN FOR NEW ROUTING **************** */
666
667 /* The minimal configuration of a new routing model need the next functions,
668  * also you need to set at the start of the file, the new model in the model
669  * list. Remember keep the null ending of the list.
670  */
671 /*** Routing model structure ***/
672 // typedef struct {
673 //   s_routing_component_t generic_routing;
674 //   /* things that your routing model need */
675 // } s_routing_component_NEW_t,*routing_component_NEW_t;
676
677 /*** Parse routing model functions ***/
678 // static void model_NEW_set_processing_unit(routing_component_t rc, const char* name) {}
679 // static void model_NEW_set_autonomous_system(routing_component_t rc, const char* name) {}
680 // static void model_NEW_set_route(routing_component_t rc, const char* src, const char* dst, route_t route) {}
681 // static void model_NEW_set_ASroute(routing_component_t rc, const char* src, const char* dst, route_extended_t route) {}
682 // static void model_NEW_set_bypassroute(routing_component_t rc, const char* src, const char* dst, route_extended_t e_route) {}
683
684 /*** Business methods ***/
685 // static route_extended_t NEW_get_route(routing_component_t rc, const char* src,const char* dst) {return NULL;}
686 // static route_extended_t NEW_get_bypass_route(routing_component_t rc, const char* src,const char* dst) {return NULL;}
687 // static void NEW_finalize(routing_component_t rc) { xbt_free(rc);}
688
689 /*** Creation routing model functions ***/
690 // static void* model_NEW_create(void) {
691 //   routing_component_NEW_t new_component =  xbt_new0(s_routing_component_NEW_t,1);
692 //   new_component->generic_routing.set_processing_unit = model_NEW_set_processing_unit;
693 //   new_component->generic_routing.set_autonomous_system = model_NEW_set_autonomous_system;
694 //   new_component->generic_routing.set_route = model_NEW_set_route;
695 //   new_component->generic_routing.set_ASroute = model_NEW_set_ASroute;
696 //   new_component->generic_routing.set_bypassroute = model_NEW_set_bypassroute;
697 //   new_component->generic_routing.get_route = NEW_get_route;
698 //   new_component->generic_routing.get_bypass_route = NEW_get_bypass_route;
699 //   new_component->generic_routing.finalize = NEW_finalize;
700 //   /* initialization of internal structures */
701 //   return new_component;
702 // } /* mandatory */
703 // static void  model_NEW_load(void) {}   /* mandatory */
704 // static void  model_NEW_unload(void) {} /* mandatory */
705 // static void  model_NEW_end(void) {}    /* mandatory */
706
707 /* ************************************************************************** */
708 /* ************************* GENERIC PARSE FUNCTIONS ************************ */
709
710 void routing_cluster_add_backbone(void* bb) {
711   xbt_assert(current_routing->model_desc == &routing_models[SURF_MODEL_CLUSTER],
712         "You have to be in model Cluster to use tag backbone!");
713   xbt_assert(!((as_cluster_t)current_routing)->backbone,"The backbone link is already defined!");
714   ((as_cluster_t)current_routing)->backbone = bb;
715   XBT_DEBUG("Add a backbone to AS '%s'",current_routing->name);
716 }
717
718 static void routing_parse_cabinet(sg_platf_cabinet_cbarg_t cabinet)
719 {
720   int start, end, i;
721   char *groups , *host_id , *link_id = NULL;
722   unsigned int iter;
723   xbt_dynar_t radical_elements;
724   xbt_dynar_t radical_ends;
725
726   //Make all hosts
727   radical_elements = xbt_str_split(cabinet->radical, ",");
728   xbt_dynar_foreach(radical_elements, iter, groups) {
729
730     radical_ends = xbt_str_split(groups, "-");
731     start = surf_parse_get_int(xbt_dynar_get_as(radical_ends, 0, char *));
732
733     switch (xbt_dynar_length(radical_ends)) {
734     case 1:
735       end = start;
736       break;
737     case 2:
738       end = surf_parse_get_int(xbt_dynar_get_as(radical_ends, 1, char *));
739       break;
740     default:
741       surf_parse_error("Malformed radical");
742       break;
743     }
744     s_sg_platf_host_cbarg_t host;
745     memset(&host, 0, sizeof(host));
746     host.initial_state = SURF_RESOURCE_ON;
747     host.power_peak = cabinet->power;
748     host.power_scale = 1.0;
749     host.core_amount = 1;
750
751     s_sg_platf_link_cbarg_t link;
752     memset(&link, 0, sizeof(link));
753     link.state = SURF_RESOURCE_ON;
754     link.policy = SURF_LINK_FULLDUPLEX;
755     link.latency = cabinet->lat;
756     link.bandwidth = cabinet->bw;
757
758     s_sg_platf_host_link_cbarg_t host_link;
759     memset(&host_link, 0, sizeof(host_link));
760
761     for (i = start; i <= end; i++) {
762       host_id = bprintf("%s%d%s",cabinet->prefix,i,cabinet->suffix);
763       link_id = bprintf("link_%s%d%s",cabinet->prefix,i,cabinet->suffix);
764       host.id = host_id;
765       link.id = link_id;
766       sg_platf_new_host(&host);
767       sg_platf_new_link(&link);
768
769       char* link_up = bprintf("%s_UP",link_id);
770       char* link_down = bprintf("%s_DOWN",link_id);
771       host_link.id = host_id;
772       host_link.link_up = link_up;
773       host_link.link_down= link_down;
774       sg_platf_new_host_link(&host_link);
775
776       free(host_id);
777       free(link_id);
778       free(link_up);
779       free(link_down);
780     }
781
782     xbt_dynar_free(&radical_ends);
783   }
784   xbt_dynar_free(&radical_elements);
785 }
786
787 static void routing_parse_cluster(sg_platf_cluster_cbarg_t cluster)
788 {
789   char *host_id, *groups, *link_id = NULL;
790   xbt_dict_t patterns = NULL;
791
792   s_sg_platf_host_cbarg_t host;
793   s_sg_platf_link_cbarg_t link;
794
795   unsigned int iter;
796   int start, end, i;
797   xbt_dynar_t radical_elements;
798   xbt_dynar_t radical_ends;
799
800   if ((cluster->availability_trace && strcmp(cluster->availability_trace, ""))
801       || (cluster->state_trace && strcmp(cluster->state_trace, ""))) {
802     patterns = xbt_dict_new_homogeneous(xbt_free_f);
803     xbt_dict_set(patterns, "id", xbt_strdup(cluster->id), NULL);
804     xbt_dict_set(patterns, "prefix", xbt_strdup(cluster->prefix), NULL);
805     xbt_dict_set(patterns, "suffix", xbt_strdup(cluster->suffix), NULL);
806   }
807
808   XBT_DEBUG("<AS id=\"%s\"\trouting=\"Cluster\">", cluster->id);
809   sg_platf_new_AS_begin(cluster->id, A_surfxml_AS_routing_Cluster);
810
811   current_routing->link_up_down_list
812             = xbt_dynar_new(sizeof(s_surf_parsing_link_up_down_t),NULL);
813
814   //Make all hosts
815   radical_elements = xbt_str_split(cluster->radical, ",");
816   xbt_dynar_foreach(radical_elements, iter, groups) {
817
818     radical_ends = xbt_str_split(groups, "-");
819     start = surf_parse_get_int(xbt_dynar_get_as(radical_ends, 0, char *));
820
821     switch (xbt_dynar_length(radical_ends)) {
822     case 1:
823       end = start;
824       break;
825     case 2:
826       end = surf_parse_get_int(xbt_dynar_get_as(radical_ends, 1, char *));
827       break;
828     default:
829       surf_parse_error("Malformed radical");
830       break;
831     }
832     for (i = start; i <= end; i++) {
833       host_id =
834           bprintf("%s%d%s", cluster->prefix, i, cluster->suffix);
835       link_id = bprintf("%s_link_%d", cluster->id, i);
836
837       XBT_DEBUG("<host\tid=\"%s\"\tpower=\"%f\">", host_id, cluster->power);
838
839       memset(&host, 0, sizeof(host));
840       host.id = host_id;
841       if (cluster->availability_trace && strcmp(cluster->availability_trace, "")) {
842         xbt_dict_set(patterns, "radical", bprintf("%d", i), NULL);
843         char *avail_file = xbt_str_varsubst(cluster->availability_trace, patterns);
844         XBT_DEBUG("\tavailability_file=\"%s\"", avail_file);
845         host.power_trace = tmgr_trace_new_from_file(avail_file);
846         xbt_free(avail_file);
847       } else {
848         XBT_DEBUG("\tavailability_file=\"\"");
849       }
850
851       if (cluster->state_trace && strcmp(cluster->state_trace, "")) {
852         char *avail_file = xbt_str_varsubst(cluster->state_trace, patterns);
853         XBT_DEBUG("\tstate_file=\"%s\"", avail_file);
854         host.state_trace = tmgr_trace_new_from_file(avail_file);
855         xbt_free(avail_file);
856       } else {
857         XBT_DEBUG("\tstate_file=\"\"");
858       }
859
860       host.power_peak = cluster->power;
861       host.power_scale = 1.0;
862       host.core_amount = cluster->core_amount;
863       host.initial_state = SURF_RESOURCE_ON;
864       host.coord = "";
865       sg_platf_new_host(&host);
866       XBT_DEBUG("</host>");
867
868       XBT_DEBUG("<link\tid=\"%s\"\tbw=\"%f\"\tlat=\"%f\"/>", link_id,
869                 cluster->bw, cluster->lat);
870
871       memset(&link, 0, sizeof(link));
872       link.id = link_id;
873       link.bandwidth = cluster->bw;
874       link.latency = cluster->lat;
875       link.state = SURF_RESOURCE_ON;
876       link.policy = cluster->sharing_policy;
877       sg_platf_new_link(&link);
878
879       s_surf_parsing_link_up_down_t info;
880
881       if (link.policy == SURF_LINK_FULLDUPLEX) {
882         char *tmp_link = bprintf("%s_UP", link_id);
883         info.link_up =
884             xbt_lib_get_or_null(link_lib, tmp_link, SURF_LINK_LEVEL);
885         free(tmp_link);
886         tmp_link = bprintf("%s_DOWN", link_id);
887         info.link_down =
888             xbt_lib_get_or_null(link_lib, tmp_link, SURF_LINK_LEVEL);
889         free(tmp_link);
890       } else {
891         info.link_up = xbt_lib_get_or_null(link_lib, link_id, SURF_LINK_LEVEL);
892         info.link_down = info.link_up;
893       }
894       xbt_dynar_push(current_routing->link_up_down_list,&info);
895       xbt_free(link_id);
896       xbt_free(host_id);
897     }
898
899     xbt_dynar_free(&radical_ends);
900   }
901   xbt_dynar_free(&radical_elements);
902
903   // Add a router. It is magically used thanks to the way in which surf_routing_cluster is written,
904   // and it's very useful to connect clusters together
905   XBT_DEBUG(" ");
906   XBT_DEBUG("<router id=\"%s\"/>", cluster->router_id);
907   char *newid = NULL;
908   s_sg_platf_router_cbarg_t router;
909   memset(&router, 0, sizeof(router));
910   router.id = cluster->router_id;
911   router.coord = "";
912   if (!router.id || !strcmp(router.id, ""))
913     router.id = newid =
914         bprintf("%s%s_router%s", cluster->prefix, cluster->id,
915                 cluster->suffix);
916   sg_platf_new_router(&router);
917   free(newid);
918
919   //Make the backbone
920   if ((cluster->bb_bw != 0) && (cluster->bb_lat != 0)) {
921     char *link_backbone = bprintf("%s_backbone", cluster->id);
922     XBT_DEBUG("<link\tid=\"%s\" bw=\"%f\" lat=\"%f\"/>", link_backbone,
923               cluster->bb_bw, cluster->bb_lat);
924
925     memset(&link, 0, sizeof(link));
926     link.id = link_backbone;
927     link.bandwidth = cluster->bb_bw;
928     link.latency = cluster->bb_lat;
929     link.state = SURF_RESOURCE_ON;
930     link.policy = cluster->bb_sharing_policy;
931
932     sg_platf_new_link(&link);
933
934     routing_cluster_add_backbone(xbt_lib_get_or_null(link_lib, link_backbone, SURF_LINK_LEVEL));
935
936     free(link_backbone);
937   }
938
939   XBT_DEBUG("</AS>");
940   sg_platf_new_AS_end();
941   XBT_DEBUG(" ");
942   xbt_dict_free(&patterns); // no op if it were never set
943 }
944
945 static void routing_parse_postparse(void) {
946   xbt_dict_free(&random_value);
947 }
948
949 static void routing_parse_peer(sg_platf_peer_cbarg_t peer)
950 {
951   char *host_id = NULL;
952   char *link_id;
953
954   XBT_DEBUG(" ");
955   host_id = HOST_PEER(peer->id);
956   link_id = LINK_PEER(peer->id);
957
958   XBT_DEBUG("<host\tid=\"%s\"\tpower=\"%f\"/>", host_id, peer->power);
959   s_sg_platf_host_cbarg_t host;
960   memset(&host, 0, sizeof(host));
961   host.initial_state = SURF_RESOURCE_ON;
962   host.id = host_id;
963   host.power_peak = peer->power;
964   host.power_scale = 1.0;
965   host.power_trace = peer->availability_trace;
966   host.state_trace = peer->state_trace;
967   host.core_amount = 1;
968   host.coord = peer->coord;
969   sg_platf_new_host(&host);
970
971   s_sg_platf_link_cbarg_t link;
972   memset(&link, 0, sizeof(link));
973   link.state = SURF_RESOURCE_ON;
974   link.policy = SURF_LINK_SHARED;
975   link.latency = peer->lat;
976
977   char* link_up = bprintf("%s_UP",link_id);
978   XBT_DEBUG("<link\tid=\"%s\"\tbw=\"%f\"\tlat=\"%f\"/>", link_up,
979             peer->bw_out, peer->lat);
980   link.id = link_up;
981   link.bandwidth = peer->bw_out;
982   sg_platf_new_link(&link);
983
984   char* link_down = bprintf("%s_DOWN",link_id);
985   XBT_DEBUG("<link\tid=\"%s\"\tbw=\"%f\"\tlat=\"%f\"/>", link_down,
986             peer->bw_in, peer->lat);
987   link.id = link_down;
988   link.bandwidth = peer->bw_in;
989   sg_platf_new_link(&link);
990
991   XBT_DEBUG("<host_link\tid=\"%s\"\tup=\"%s\"\tdown=\"%s\" />", host_id,link_up,link_down);
992   s_sg_platf_host_link_cbarg_t host_link;
993   memset(&host_link, 0, sizeof(host_link));
994   host_link.id = host_id;
995   host_link.link_up = link_up;
996   host_link.link_down= link_down;
997   sg_platf_new_host_link(&host_link);
998
999   XBT_DEBUG(" ");
1000
1001   //xbt_dynar_free(&tab_elements_num);
1002   free(host_id);
1003   free(link_id);
1004   free(link_up);
1005   free(link_down);
1006 }
1007
1008 static void routing_parse_Srandom(void)
1009 {
1010   double mean, std, min, max, seed;
1011   char *random_id = A_surfxml_random_id;
1012   char *random_radical = A_surfxml_random_radical;
1013   char *rd_name = NULL;
1014   char *rd_value;
1015   mean = surf_parse_get_double(A_surfxml_random_mean);
1016   std = surf_parse_get_double(A_surfxml_random_std_deviation);
1017   min = surf_parse_get_double(A_surfxml_random_min);
1018   max = surf_parse_get_double(A_surfxml_random_max);
1019   seed = surf_parse_get_double(A_surfxml_random_seed);
1020
1021   double res = 0;
1022   int i = 0;
1023   random_data_t random = xbt_new0(s_random_data_t, 1);
1024   char *tmpbuf;
1025
1026   xbt_dynar_t radical_elements;
1027   unsigned int iter;
1028   char *groups;
1029   int start, end;
1030   xbt_dynar_t radical_ends;
1031
1032   switch (A_surfxml_random_generator) {
1033   case AU_surfxml_random_generator:
1034   case A_surfxml_random_generator_NONE:
1035     random->generator = NONE;
1036     break;
1037   case A_surfxml_random_generator_DRAND48:
1038     random->generator = DRAND48;
1039     break;
1040   case A_surfxml_random_generator_RAND:
1041     random->generator = RAND;
1042     break;
1043   case A_surfxml_random_generator_RNGSTREAM:
1044     random->generator = RNGSTREAM;
1045     break;
1046   default:
1047     surf_parse_error("Invalid random generator");
1048     break;
1049   }
1050   random->seed = seed;
1051   random->min = min;
1052   random->max = max;
1053
1054   /* Check user stupidities */
1055   if (max < min)
1056     THROWF(arg_error, 0, "random->max < random->min (%f < %f)", max, min);
1057   if (mean < min)
1058     THROWF(arg_error, 0, "random->mean < random->min (%f < %f)", mean, min);
1059   if (mean > max)
1060     THROWF(arg_error, 0, "random->mean > random->max (%f > %f)", mean, max);
1061
1062   /* normalize the mean and standard deviation before storing */
1063   random->mean = (mean - min) / (max - min);
1064   random->std = std / (max - min);
1065
1066   if (random->mean * (1 - random->mean) < random->std * random->std)
1067     THROWF(arg_error, 0, "Invalid mean and standard deviation (%f and %f)",
1068            random->mean, random->std);
1069
1070   XBT_DEBUG
1071       ("id = '%s' min = '%f' max = '%f' mean = '%f' std_deviatinon = '%f' generator = '%d' seed = '%ld' radical = '%s'",
1072        random_id, random->min, random->max, random->mean, random->std,
1073        (int)random->generator, random->seed, random_radical);
1074
1075   if (!random_value)
1076     random_value = xbt_dict_new_homogeneous(free);
1077
1078   if (!strcmp(random_radical, "")) {
1079     res = random_generate(random);
1080     rd_value = bprintf("%f", res);
1081     xbt_dict_set(random_value, random_id, rd_value, NULL);
1082   } else {
1083     radical_elements = xbt_str_split(random_radical, ",");
1084     xbt_dynar_foreach(radical_elements, iter, groups) {
1085       radical_ends = xbt_str_split(groups, "-");
1086       switch (xbt_dynar_length(radical_ends)) {
1087       case 1:
1088         xbt_assert(!xbt_dict_get_or_null(random_value, random_id),
1089                    "Custom Random '%s' already exists !", random_id);
1090         res = random_generate(random);
1091         tmpbuf =
1092             bprintf("%s%d", random_id,
1093                     atoi(xbt_dynar_getfirst_as(radical_ends, char *)));
1094         xbt_dict_set(random_value, tmpbuf, bprintf("%f", res), NULL);
1095         xbt_free(tmpbuf);
1096         break;
1097
1098       case 2:
1099         start = surf_parse_get_int(xbt_dynar_get_as(radical_ends, 0, char *));
1100         end = surf_parse_get_int(xbt_dynar_get_as(radical_ends, 1, char *));
1101         for (i = start; i <= end; i++) {
1102           xbt_assert(!xbt_dict_get_or_null(random_value, random_id),
1103                      "Custom Random '%s' already exists !", bprintf("%s%d",
1104                                                                     random_id,
1105                                                                     i));
1106           res = random_generate(random);
1107           tmpbuf = bprintf("%s%d", random_id, i);
1108           xbt_dict_set(random_value, tmpbuf, bprintf("%f", res), NULL);
1109           xbt_free(tmpbuf);
1110         }
1111         break;
1112       default:
1113         XBT_CRITICAL("Malformed radical");
1114         break;
1115       }
1116       res = random_generate(random);
1117       rd_name = bprintf("%s_router", random_id);
1118       rd_value = bprintf("%f", res);
1119       xbt_dict_set(random_value, rd_name, rd_value, NULL);
1120
1121       xbt_dynar_free(&radical_ends);
1122     }
1123     free(rd_name);
1124     xbt_dynar_free(&radical_elements);
1125   }
1126 }
1127
1128 void routing_register_callbacks()
1129 {
1130   sg_platf_host_add_cb(parse_S_host);
1131   sg_platf_router_add_cb(parse_S_router);
1132   sg_platf_host_link_add_cb(parse_S_host_link);
1133   sg_platf_route_add_cb(parse_E_route);
1134   sg_platf_ASroute_add_cb(parse_E_ASroute);
1135   sg_platf_bypassRoute_add_cb(parse_E_bypassRoute);
1136   sg_platf_bypassASroute_add_cb(parse_E_bypassASroute);
1137
1138   sg_platf_cluster_add_cb(routing_parse_cluster);
1139   sg_platf_cabinet_add_cb(routing_parse_cabinet);
1140
1141   sg_platf_peer_add_cb(routing_parse_peer);
1142   sg_platf_postparse_add_cb(routing_parse_postparse);
1143
1144   sg_platf_linkctn_add_cb(routing_parse_link_ctn);
1145
1146   /* we care about the ASes while parsing the platf. Incredible, isnt it? */
1147   sg_platf_AS_end_add_cb(routing_AS_end);
1148   sg_platf_AS_begin_add_cb(routing_AS_begin);
1149
1150
1151
1152 #ifdef HAVE_TRACING
1153   instr_routing_define_callbacks();
1154 #endif
1155 }
1156
1157 /**
1158  * \brief Recursive function for finalize
1159  *
1160  * \param rc the source host name
1161  *
1162  * This fuction is call by "finalize". It allow to finalize the
1163  * AS or routing components. It delete all the structures.
1164  */
1165 static void finalize_rec(AS_t as) {
1166   xbt_dict_cursor_t cursor = NULL;
1167   char *key;
1168   AS_t elem;
1169
1170   xbt_dict_foreach(as->routing_sons, cursor, key, elem) {
1171     finalize_rec(elem);
1172   }
1173
1174   as->finalize(as);
1175 }
1176
1177 /** \brief Frees all memory allocated by the routing module */
1178 void routing_exit(void) {
1179   if (!routing_platf)
1180     return;
1181   xbt_dynar_free(&routing_platf->last_route);
1182   finalize_rec(routing_platf->root);
1183   xbt_free(routing_platf);
1184 }