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router_choose_random_node can take a smartlist of nodes to exclude

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svn:r1442
This commit is contained in:
Roger Dingledine 2004-04-02 22:30:39 +00:00
parent f34e6da3e7
commit fc3d7383e7
3 changed files with 15 additions and 3 deletions
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2
src/or/onion.c
View File

@ -334,7 +334,7 @@ static routerinfo_t *choose_good_exit_server(uint8_t purpose, routerlist_t *dir)
if(purpose == CIRCUIT_PURPOSE_C_GENERAL)
return choose_good_exit_server_general(dir);
else
return router_choose_random_node(dir, options.RendNodes, options.RendExcludeNodes);
return router_choose_random_node(dir, options.RendNodes, options.RendExcludeNodes, NULL);
}
cpath_build_state_t *onion_new_cpath_build_state(uint8_t purpose,

4
src/or/or.h
View File

@ -975,7 +975,9 @@ int router_dump_router_to_string(char *s, int maxlen, routerinfo_t *router,
/********************************* routerlist.c ***************************/
routerinfo_t *router_pick_directory_server(void);
routerinfo_t *router_choose_random_node(routerlist_t *dir, char *preferred, char *excluded);
routerinfo_t *router_choose_random_node(routerlist_t *dir,
char *preferred, char *excluded,
smartlist_t *excludedsmartlist);
routerinfo_t *router_get_by_addr_port(uint32_t addr, uint16_t port);
routerinfo_t *router_get_by_link_pk(crypto_pk_env_t *pk);
routerinfo_t *router_get_by_nickname(char *nickname);

12
src/or/routerlist.c
View File

@ -233,7 +233,13 @@ void router_add_running_routers_to_smartlist(smartlist_t *sl) {
}
}
routerinfo_t *router_choose_random_node(routerlist_t *dir, char *preferred, char *excluded)
/* Pick a random node from preferred if possible, else from all of dir.
* Never pick a node in excluded.
* If excludedsmartlist is defined, never pick a node in it either.
*/
routerinfo_t *router_choose_random_node(routerlist_t *dir,
char *preferred, char *excluded,
smartlist_t *excludedsmartlist)
{
smartlist_t *sl, *excludednodes;
routerinfo_t *choice;
@ -245,12 +251,16 @@ routerinfo_t *router_choose_random_node(routerlist_t *dir, char *preferred, char
sl = smartlist_create();
add_nickname_list_to_smartlist(sl,preferred);
smartlist_subtract(sl,excludednodes);
if(excludedsmartlist)
smartlist_subtract(sl,excludedsmartlist);
choice = smartlist_choose(sl);
smartlist_free(sl);
if(!choice) {
sl = smartlist_create();
router_add_running_routers_to_smartlist(sl);
smartlist_subtract(sl,excludednodes);
if(excludedsmartlist)
smartlist_subtract(sl,excludedsmartlist);
choice = smartlist_choose(sl);
smartlist_free(sl);
}