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evdns: fix a bug in circular-queue implementation

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found by Wang Qin
This commit is contained in:
Nick Mathewson 2012-02-01 14:56:43 -05:00
parent 9f9e259fda
commit d6094b160f
1 changed files with 2 additions and 3 deletions
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5
evdns.c
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@ -167,6 +167,7 @@ struct request {
struct nameserver *ns; /* the server which we last sent it */
/* these objects are kept in a circular list */
/* XXX We could turn this into a CIRCLEQ. */
struct request *next, *prev;
struct event timeout_event;
@ -2472,9 +2473,7 @@ _evdns_nameserver_add_impl(struct evdns_base *base, const struct sockaddr *addre
ns->next = base->server_head->next;
ns->prev = base->server_head;
base->server_head->next = ns;
if (base->server_head->prev == base->server_head) {
base->server_head->prev = ns;
}
ns->next->prev = ns;
}
base->global_good_nameservers++;