1 /* Name resolution using adns */
9 struct resolver_if ops;
16 resolve_answer_fn *answer;
20 static bool_t resolve_request(void *sst, string_t name,
21 resolve_answer_fn *cb, void *cst)
27 q=safe_malloc(sizeof *q,"resolve_request");
31 rv=adns_submit(st->ast, name, adns_r_a, 0, q, &q->query);
36 static int resolver_beforepoll(void *sst, struct pollfd *fds, int *nfds_io,
37 int *timeout_io, const struct timeval *tv_now,
41 return adns_beforepoll(st->ast, fds, nfds_io, timeout_io, tv_now);
44 static void resolver_afterpoll(void *sst, struct pollfd *fds, int nfds,
45 const struct timeval *tv_now, uint64_t *now)
54 adns_afterpoll(st->ast, fds, nfds, tv_now);
58 rv=adns_check(st->ast, &aq, &ans, &qp);
61 if (ans->status!=adns_s_ok) {
62 q->answer(q->cst,NULL); /* Failure */
66 q->answer(q->cst,ans->rrs.inaddr);
70 } else if (rv==EAGAIN || rv==ESRCH) {
73 fatal("resolver_afterpoll: adns_check() returned %d\n",rv);
80 /* Initialise adns, using parameters supplied */
81 static list_t *adnsresolver_apply(closure_t *self, struct cloc loc,
82 dict_t *context, list_t *args)
89 st=safe_malloc(sizeof(*st),"adnsresolver_apply");
90 st->cl.description="adns";
91 st->cl.type=CL_RESOLVER;
93 st->cl.interface=&st->ops;
96 st->ops.request=resolve_request;
99 if (!i || i->type!=t_dict) {
100 cfgfatal(st->loc,"adns","first argument must be a dictionary\n");
103 conf=dict_read_string(d,"config",False,"adns",loc);
106 if (adns_init_strcfg(&st->ast, 0, 0, conf)) {
107 fatal_perror("Failed to initialise ADNS");
110 if (adns_init(&st->ast, 0, 0)) {
111 fatal_perror("Failed to initialise ADNS");
115 register_for_poll(st, resolver_beforepoll, resolver_afterpoll,
116 ADNS_POLLFDS_RECOMMENDED+5,"resolver");
118 return new_closure(&st->cl);
121 init_module resolver_module;
122 void resolver_module(dict_t *dict)
124 add_closure(dict,"adns",adnsresolver_apply);