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short-circuit half the cost of node-picking in the general case.

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svn:r5732
This commit is contained in:
Roger Dingledine 2006-01-05 10:59:46 +00:00
parent 1107c40dc0
commit 6aaa92f736
1 changed files with 10 additions and 8 deletions
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18
src/or/routerlist.c
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@ -809,20 +809,22 @@ router_choose_random_node(const char *preferred,
int allow_unverified, int strict)
{
smartlist_t *sl, *excludednodes;
routerinfo_t *choice;
routerinfo_t *choice = NULL;
excludednodes = smartlist_create();
add_nickname_list_to_smartlist(excludednodes,excluded,0,0,1);
/* Try the preferred nodes first. Ignore need_uptime and need_capacity,
* since the user explicitly asked for these nodes. */
sl = smartlist_create();
add_nickname_list_to_smartlist(sl,preferred,1,1,1);
smartlist_subtract(sl,excludednodes);
if (excludedsmartlist)
smartlist_subtract(sl,excludedsmartlist);
choice = smartlist_choose(sl);
smartlist_free(sl);
if (preferred) {
sl = smartlist_create();
add_nickname_list_to_smartlist(sl,preferred,1,1,1);
smartlist_subtract(sl,excludednodes);
if (excludedsmartlist)
smartlist_subtract(sl,excludedsmartlist);
choice = smartlist_choose(sl);
smartlist_free(sl);
}
if (!choice && !strict) {
/* Then give up on our preferred choices: any node
* will do that has the required attributes. */