EV-ADNS/ADNS.xs

#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"

#include <poll.h>
#include <adns.h>

#include "EVAPI.h"

static HV *stash;
static adns_state ads;

struct ctx
{
  SV *self;
  adns_query query;
  SV *cb;
};

static SV *
ha2sv (adns_rr_hostaddr *rr)
{
  AV *av = newAV ();
  av_push (av, newSVpv (rr->host, 0));
  // TODO: add addresses

  return newRV_noinc ((SV *)av);
}

static void
process ()
{
  dSP;

  for (;;)
    {
      int i;
      adns_query q = 0;
      adns_answer *a;
      void *ctx;
      SV *cb;
      struct ctx *c;
      int r = adns_check (ads, &q, &a, &ctx);
      
      if (r)
        break;

      c = (struct ctx *)ctx;
      cb = c->cb;
      c->cb = 0;
      ev_unref ();
      SvREFCNT_dec (c->self);

      PUSHMARK (SP);

      EXTEND (SP, a->nrrs + 2);
      PUSHs (sv_2mortal (newSViv (a->status)));
      PUSHs (sv_2mortal (newSViv (a->expires)));

      for (i = 0; i < a->nrrs; ++i)
        {
          SV *sv;

          switch (a->type & adns_r_unknown ? adns_r_unknown : a->type)
            {
              case adns_r_ns_raw:
              case adns_r_cname:
              case adns_r_ptr:
              case adns_r_ptr_raw:
                sv = newSVpv (a->rrs.str [i], 0);
                break;

              case adns_r_txt:
                {
                  AV *av = newAV ();
                  adns_rr_intstr *rr = a->rrs.manyistr [i];

                  while (rr->str)
                    {
                      av_push (av, newSVpvn (rr->str, rr->i));
                      ++rr;
                    }

                  sv = newRV_noinc ((SV *)av);
                }
                break;

              case adns_r_a:
                sv = newSVpv (inet_ntoa (a->rrs.inaddr [i]), 0);
                break;

              case adns_r_ns:
                sv = ha2sv (a->rrs.hostaddr + i);
                break;

              case adns_r_hinfo:
                {
                  /* untested */
                  AV *av = newAV ();
                  adns_rr_intstrpair *rr = a->rrs.intstrpair + i;

                  av_push (av, newSVpvn (rr->array [0].str, rr->array [0].i));
                  av_push (av, newSVpvn (rr->array [1].str, rr->array [1].i));

                  sv = newRV_noinc ((SV *)av);
                }
                break;

              case adns_r_rp:
              case adns_r_rp_raw:
                {
                  /* untested */
                  AV *av = newAV ();
                  adns_rr_strpair *rr = a->rrs.strpair + i;

                  av_push (av, newSVpv (rr->array [0], 0));
                  av_push (av, newSVpv (rr->array [1], 0));

                  sv = newRV_noinc ((SV *)av);
                }
                break;

              case adns_r_mx:
                {
                  AV *av = newAV ();
                  adns_rr_inthostaddr *rr = a->rrs.inthostaddr + i;

                  av_push (av, newSViv (rr->i));
                  av_push (av, ha2sv (&rr->ha));

                  sv = newRV_noinc ((SV *)av);
                }
                break;

              case adns_r_mx_raw:
                {
                  AV *av = newAV ();
                  adns_rr_intstr *rr = a->rrs.intstr + i;

                  av_push (av, newSViv (rr->i));
                  av_push (av, newSVpv (rr->str, 0));

                  sv = newRV_noinc ((SV *)av);
                }
                break;

              case adns_r_soa:
              case adns_r_soa_raw:
                {
                  AV *av = newAV ();
                  adns_rr_soa *rr = a->rrs.soa + i;

                  av_push (av, newSVpv (rr->mname, 0));
                  av_push (av, newSVpv (rr->rname, 0));
                  av_push (av, newSVuv (rr->serial));
                  av_push (av, newSVuv (rr->refresh));
                  av_push (av, newSVuv (rr->retry));
                  av_push (av, newSVuv (rr->expire));
                  av_push (av, newSVuv (rr->minimum));

                  sv = newRV_noinc ((SV *)av);
                }
                break;

              case adns_r_srv_raw:
                {
                  AV *av = newAV ();
                  adns_rr_srvraw *rr = a->rrs.srvraw + i;

                  av_push (av, newSViv (rr->priority));
                  av_push (av, newSViv (rr->weight));
                  av_push (av, newSViv (rr->port));
                  av_push (av, newSVpv (rr->host, 0));

                  sv = newRV_noinc ((SV *)av);
                }
                break;

              case adns_r_srv:
                {
                  AV *av = newAV ();
                  adns_rr_srvha *rr = a->rrs.srvha + i;

                  av_push (av, newSViv (rr->priority));
                  av_push (av, newSViv (rr->weight));
                  av_push (av, newSViv (rr->port));
                  av_push (av, ha2sv (&rr->ha));

                  sv = newRV_noinc ((SV *)av);
                }
                break;

              case adns_r_unknown:
                sv = newSVpvn (a->rrs.byteblock [i].data, a->rrs.byteblock [i].len);
                break;

              default:
              case adns_r_addr:
                sv = &PL_sv_undef; /* not supported */
                break;
            }

          PUSHs (sv_2mortal (sv));
        }

      free (a);

      PUTBACK;
      call_sv (cb, G_VOID | G_DISCARD | G_EVAL);
      SPAGAIN;

      SvREFCNT_dec (cb);
    }
}

static struct pollfd *fds;
static int nfd, mfd;
static ev_io *iow;
static ev_timer tw;
static ev_prepare prepare_ev;
static struct timeval tv_now;

static void
update_now (EV_P)
{
  ev_tstamp t = ev_now ();

  tv_now.tv_sec  = (long)t;
  tv_now.tv_usec = (long)((t - (ev_tstamp)tv_now.tv_sec) * 1e-6);
}

static void
timer_cb (EV_P_ ev_timer *w, int revents)
{
}

static void
io_cb (EV_P_ ev_io *w, int revents)
{
  update_now (EV_A);

  if (revents & EV_READ ) adns_processreadable  (ads, w->fd, &tv_now);
  if (revents & EV_WRITE) adns_processwriteable (ads, w->fd, &tv_now);
}

// create io watchers for each fd and a timer before blocking
static void
prepare_cb (EV_P_ ev_prepare *w, int revents)
{
  int i;
  int timeout = 3600000;

  if (ev_is_active (&tw))
    {
      ev_ref ();
      ev_timer_stop (EV_A_ &tw);
    }

  for (i = 0; i < nfd; ++i)
    {
      ev_ref ();
      ev_io_stop (EV_A_ iow + i);
    }

  process ();

  update_now (EV_A);

  nfd = mfd;

  while (adns_beforepoll (ads, fds, &nfd, &timeout, &tv_now))
    {
      mfd = nfd;

      free (iow); iow = malloc (mfd * sizeof (ev_io));
      free (fds); fds = malloc (mfd * sizeof (struct pollfd));
    }

  ev_timer_set (&tw, timeout * 1e-3, 0.);
  ev_timer_start (EV_A_ &tw);
  ev_unref ();

  // create one ev_io per pollfd
  for (i = 0; i < nfd; ++i)
    {
      ev_io_init (iow + i, io_cb, fds [i].fd,
        ((fds [i].events & POLLIN ? EV_READ : 0)
         | (fds [i].events & POLLOUT ? EV_WRITE : 0)));

      ev_io_start (EV_A_ iow + i);
      ev_unref ();
    }
}

MODULE = EV::ADNS                PACKAGE = EV::ADNS

PROTOTYPES: ENABLE

BOOT:
{
  stash = gv_stashpv ("EV::ADNS", 1);

  static const struct {
    const char *name;
    IV iv;
  } *civ, const_iv[] = {
#   define const_iv(name) { # name, (IV) adns_ ## name },
    const_iv (if_none)
    const_iv (if_noenv)
    const_iv (if_noerrprint)
    const_iv (if_noserverwarn)
    const_iv (if_debug)
    const_iv (if_logpid)
    const_iv (if_noautosys)
    const_iv (if_eintr)
    const_iv (if_nosigpipe)
    const_iv (if_checkc_entex)
    const_iv (if_checkc_freq)

    const_iv (qf_none)
    const_iv (qf_search)
    const_iv (qf_usevc)
    const_iv (qf_owner)
    const_iv (qf_quoteok_query)
    const_iv (qf_quoteok_cname)
    const_iv (qf_quoteok_anshost)
    const_iv (qf_quotefail_cname)
    const_iv (qf_cname_loose)
    const_iv (qf_cname_forbid)

    const_iv (rrt_typemask)
    const_iv (_qtf_deref)
    const_iv (_qtf_mail822)
    const_iv (r_unknown)
    const_iv (r_none)
    const_iv (r_a)
    const_iv (r_ns_raw)
    const_iv (r_ns)
    const_iv (r_cname)
    const_iv (r_soa_raw)
    const_iv (r_soa)
    const_iv (r_ptr_raw)
    const_iv (r_ptr)
    const_iv (r_hinfo)
    const_iv (r_mx_raw)
    const_iv (r_mx)
    const_iv (r_txt)
    const_iv (r_rp_raw)
    const_iv (r_rp)
    const_iv (r_srv_raw)
    const_iv (r_srv)
    const_iv (r_addr)

    const_iv (s_ok)
    const_iv (s_nomemory)
    const_iv (s_unknownrrtype)
    const_iv (s_systemfail)
    const_iv (s_max_localfail)
    const_iv (s_timeout)
    const_iv (s_allservfail)
    const_iv (s_norecurse)
    const_iv (s_invalidresponse)
    const_iv (s_unknownformat)
    const_iv (s_max_remotefail)
    const_iv (s_rcodeservfail)
    const_iv (s_rcodeformaterror)
    const_iv (s_rcodenotimplemented)
    const_iv (s_rcoderefused)
    const_iv (s_rcodeunknown)
    const_iv (s_max_tempfail)
    const_iv (s_inconsistent)
    const_iv (s_prohibitedcname)
    const_iv (s_answerdomaininvalid)
    const_iv (s_answerdomaintoolong)
    const_iv (s_invaliddata)
    const_iv (s_max_misconfig)
    const_iv (s_querydomainwrong)
    const_iv (s_querydomaininvalid)
    const_iv (s_querydomaintoolong)
    const_iv (s_max_misquery)
    const_iv (s_nxdomain)
    const_iv (s_nodata)
    const_iv (s_max_permfail)
  };

  for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
    newCONSTSUB (stash, (char *)civ->name, newSViv (civ->iv));

  I_EV_API ("EV::ADNS");

  ev_prepare_init (&prepare_ev, prepare_cb); ev_prepare_start (EV_DEFAULT_ &prepare_ev);
  ev_unref ();

  ev_init (&tw, timer_cb);

  adns_init (&ads, adns_if_noenv | adns_if_noerrprint | adns_if_noserverwarn | adns_if_noautosys, 0);
}

void submit (char *owner, int type, int flags, SV *cb)
        PPCODE:
{
        SV *csv = NEWSV (0, sizeof (struct ctx));
        struct ctx *c = (struct ctx *)SvPVX (csv);
        int r = adns_submit (ads, owner, type, flags, (void *)c, &c->query);

        if (r)
          {
            SvREFCNT_dec (csv);
            errno = r;
            XSRETURN_EMPTY;
          }
        else
          {
            ev_ref ();
            SvPOK_only (csv);
            SvCUR_set (csv, sizeof (struct ctx));

            c->self = csv;
            c->cb   = newSVsv (cb);

            if (GIMME_V != G_VOID)
              {
                csv = sv_2mortal (newRV_inc (csv));
                sv_bless (csv, stash);
                XPUSHs (csv);
              }
          }
}

void DESTROY (SV *req)
        ALIAS:
        cancel = 1
        CODE:
{
        struct ctx *c;

        if (!(SvROK (req) && SvOBJECT (SvRV (req))
              && (SvSTASH (SvRV (req)) == stash)))
          croak ("object is not of type EV::ADNS");
        
        c = (struct ctx *)SvPVX (SvRV (req));

        if (c->cb)
          {
            ev_unref ();
            SvREFCNT_dec (c->cb);
            c->cb = 0;
            adns_cancel (c->query);
            SvREFCNT_dec (c->self);
          }
}


Revision:	1.8
Committed:	Sat Dec 1 21:29:08 2007 UTC (18 years, 9 months ago) by root
Branch:	MAIN
CVS Tags:	rel-0_1
Changes since 1.7:	+26 -8 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.1	#include "EXTERN.h"
2			#include "perl.h"
3			#include "XSUB.h"
4
5			#include <poll.h>
6			#include <adns.h>
7
8			#include "EVAPI.h"
9
10	root	1.2	static HV *stash;
11	root	1.1	static adns_state ads;
12
13			struct ctx
14			{
15	root	1.2	SV *self;
16			adns_query query;
17	root	1.1	SV *cb;
18			};
19
20	root	1.6	static SV *
21			ha2sv (adns_rr_hostaddr *rr)
22			{
23			AV *av = newAV ();
24			av_push (av, newSVpv (rr->host, 0));
25			// TODO: add addresses
26
27			return newRV_noinc ((SV *)av);
28			}
29
30	root	1.1	static void
31			process ()
32			{
33	root	1.3	dSP;
34
35	root	1.1	for (;;)
36			{
37	root	1.6	int i;
38	root	1.4	adns_query q = 0;
39	root	1.1	adns_answer *a;
40	root	1.3	void *ctx;
41			SV *cb;
42			struct ctx *c;
43			int r = adns_check (ads, &q, &a, &ctx);
44	root	1.1
45			if (r)
46			break;
47	root	1.3
48			c = (struct ctx *)ctx;
49			cb = c->cb;
50			c->cb = 0;
51			ev_unref ();
52	root	1.6	SvREFCNT_dec (c->self);
53	root	1.3
54	root	1.5	PUSHMARK (SP);
55
56	root	1.6	EXTEND (SP, a->nrrs + 2);
57			PUSHs (sv_2mortal (newSViv (a->status)));
58			PUSHs (sv_2mortal (newSViv (a->expires)));
59
60			for (i = 0; i < a->nrrs; ++i)
61			{
62			SV *sv;
63
64			switch (a->type & adns_r_unknown ? adns_r_unknown : a->type)
65			{
66			case adns_r_ns_raw:
67			case adns_r_cname:
68			case adns_r_ptr:
69			case adns_r_ptr_raw:
70			sv = newSVpv (a->rrs.str [i], 0);
71			break;
72
73			case adns_r_txt:
74	root	1.8	{
75			AV *av = newAV ();
76			adns_rr_intstr *rr = a->rrs.manyistr [i];
77
78			while (rr->str)
79			{
80			av_push (av, newSVpvn (rr->str, rr->i));
81			++rr;
82			}
83
84			sv = newRV_noinc ((SV *)av);
85			}
86	root	1.6	break;
87
88			case adns_r_a:
89			sv = newSVpv (inet_ntoa (a->rrs.inaddr [i]), 0);
90			break;
91
92			case adns_r_ns:
93			sv = ha2sv (a->rrs.hostaddr + i);
94			break;
95
96			case adns_r_hinfo:
97			{
98			/* untested */
99			AV *av = newAV ();
100			adns_rr_intstrpair *rr = a->rrs.intstrpair + i;
101
102			av_push (av, newSVpvn (rr->array [0].str, rr->array [0].i));
103			av_push (av, newSVpvn (rr->array [1].str, rr->array [1].i));
104	root	1.8
105			sv = newRV_noinc ((SV *)av);
106	root	1.6	}
107			break;
108
109			case adns_r_rp:
110			case adns_r_rp_raw:
111			{
112			/* untested */
113			AV *av = newAV ();
114			adns_rr_strpair *rr = a->rrs.strpair + i;
115
116			av_push (av, newSVpv (rr->array [0], 0));
117			av_push (av, newSVpv (rr->array [1], 0));
118	root	1.8
119			sv = newRV_noinc ((SV *)av);
120	root	1.6	}
121			break;
122
123			case adns_r_mx:
124			{
125			AV *av = newAV ();
126			adns_rr_inthostaddr *rr = a->rrs.inthostaddr + i;
127
128			av_push (av, newSViv (rr->i));
129			av_push (av, ha2sv (&rr->ha));
130	root	1.8
131			sv = newRV_noinc ((SV *)av);
132	root	1.6	}
133			break;
134
135			case adns_r_mx_raw:
136			{
137			AV *av = newAV ();
138			adns_rr_intstr *rr = a->rrs.intstr + i;
139
140			av_push (av, newSViv (rr->i));
141			av_push (av, newSVpv (rr->str, 0));
142	root	1.8
143			sv = newRV_noinc ((SV *)av);
144	root	1.6	}
145			break;
146
147			case adns_r_soa:
148			case adns_r_soa_raw:
149			{
150			AV *av = newAV ();
151			adns_rr_soa *rr = a->rrs.soa + i;
152
153			av_push (av, newSVpv (rr->mname, 0));
154			av_push (av, newSVpv (rr->rname, 0));
155			av_push (av, newSVuv (rr->serial));
156			av_push (av, newSVuv (rr->refresh));
157			av_push (av, newSVuv (rr->retry));
158			av_push (av, newSVuv (rr->expire));
159			av_push (av, newSVuv (rr->minimum));
160	root	1.8
161			sv = newRV_noinc ((SV *)av);
162	root	1.6	}
163			break;
164
165			case adns_r_srv_raw:
166			{
167			AV *av = newAV ();
168			adns_rr_srvraw *rr = a->rrs.srvraw + i;
169
170			av_push (av, newSViv (rr->priority));
171			av_push (av, newSViv (rr->weight));
172			av_push (av, newSViv (rr->port));
173			av_push (av, newSVpv (rr->host, 0));
174	root	1.8
175			sv = newRV_noinc ((SV *)av);
176	root	1.6	}
177			break;
178
179			case adns_r_srv:
180			{
181			AV *av = newAV ();
182			adns_rr_srvha *rr = a->rrs.srvha + i;
183
184			av_push (av, newSViv (rr->priority));
185			av_push (av, newSViv (rr->weight));
186			av_push (av, newSViv (rr->port));
187			av_push (av, ha2sv (&rr->ha));
188	root	1.8
189			sv = newRV_noinc ((SV *)av);
190	root	1.6	}
191			break;
192
193			case adns_r_unknown:
194			sv = newSVpvn (a->rrs.byteblock [i].data, a->rrs.byteblock [i].len);
195			break;
196
197			default:
198			case adns_r_addr:
199			sv = &PL_sv_undef; /* not supported */
200			break;
201			}
202
203			PUSHs (sv_2mortal (sv));
204			}
205
206	root	1.4	free (a);
207
208			PUTBACK;
209	root	1.5	call_sv (cb, G_VOID \| G_DISCARD \| G_EVAL);
210	root	1.4	SPAGAIN;
211	root	1.3
212			SvREFCNT_dec (cb);
213	root	1.1	}
214			}
215
216			static struct pollfd *fds;
217	root	1.4	static int nfd, mfd;
218	root	1.1	static ev_io *iow;
219			static ev_timer tw;
220			static ev_prepare prepare_ev;
221	root	1.2	static struct timeval tv_now;
222	root	1.1
223			static void
224			update_now (EV_P)
225			{
226	root	1.2	ev_tstamp t = ev_now ();
227	root	1.1
228	root	1.2	tv_now.tv_sec = (long)t;
229			tv_now.tv_usec = (long)((t - (ev_tstamp)tv_now.tv_sec) * 1e-6);
230	root	1.1	}
231
232			static void
233			timer_cb (EV_P_ ev_timer *w, int revents)
234			{
235			}
236
237			static void
238			io_cb (EV_P_ ev_io *w, int revents)
239			{
240			update_now (EV_A);
241
242			if (revents & EV_READ ) adns_processreadable (ads, w->fd, &tv_now);
243			if (revents & EV_WRITE) adns_processwriteable (ads, w->fd, &tv_now);
244			}
245
246			// create io watchers for each fd and a timer before blocking
247			static void
248			prepare_cb (EV_P_ ev_prepare *w, int revents)
249			{
250			int i;
251			int timeout = 3600000;
252
253	root	1.6	if (ev_is_active (&tw))
254			{
255			ev_ref ();
256			ev_timer_stop (EV_A_ &tw);
257			}
258	root	1.1
259			for (i = 0; i < nfd; ++i)
260	root	1.6	{
261			ev_ref ();
262			ev_io_stop (EV_A_ iow + i);
263			}
264	root	1.1
265			process ();
266
267			update_now (EV_A);
268
269	root	1.4	nfd = mfd;
270
271	root	1.1	while (adns_beforepoll (ads, fds, &nfd, &timeout, &tv_now))
272			{
273	root	1.4	mfd = nfd;
274
275	root	1.7	free (iow); iow = malloc (mfd * sizeof (ev_io));
276			free (fds); fds = malloc (mfd * sizeof (struct pollfd));
277	root	1.1	}
278
279			ev_timer_set (&tw, timeout * 1e-3, 0.);
280			ev_timer_start (EV_A_ &tw);
281	root	1.6	ev_unref ();
282	root	1.1
283	root	1.4	// create one ev_io per pollfd
284	root	1.1	for (i = 0; i < nfd; ++i)
285			{
286			ev_io_init (iow + i, io_cb, fds [i].fd,
287			((fds [i].events & POLLIN ? EV_READ : 0)
288			\| (fds [i].events & POLLOUT ? EV_WRITE : 0)));
289
290			ev_io_start (EV_A_ iow + i);
291	root	1.6	ev_unref ();
292	root	1.1	}
293			}
294
295			MODULE = EV::ADNS PACKAGE = EV::ADNS
296
297			PROTOTYPES: ENABLE
298
299			BOOT:
300			{
301	root	1.2	stash = gv_stashpv ("EV::ADNS", 1);
302	root	1.1
303			static const struct {
304			const char *name;
305			IV iv;
306			} *civ, const_iv[] = {
307	root	1.3	# define const_iv(name) { # name, (IV) adns_ ## name },
308	root	1.1	const_iv (if_none)
309			const_iv (if_noenv)
310			const_iv (if_noerrprint)
311			const_iv (if_noserverwarn)
312			const_iv (if_debug)
313			const_iv (if_logpid)
314			const_iv (if_noautosys)
315			const_iv (if_eintr)
316			const_iv (if_nosigpipe)
317			const_iv (if_checkc_entex)
318			const_iv (if_checkc_freq)
319
320			const_iv (qf_none)
321			const_iv (qf_search)
322			const_iv (qf_usevc)
323			const_iv (qf_owner)
324			const_iv (qf_quoteok_query)
325			const_iv (qf_quoteok_cname)
326			const_iv (qf_quoteok_anshost)
327			const_iv (qf_quotefail_cname)
328			const_iv (qf_cname_loose)
329			const_iv (qf_cname_forbid)
330
331			const_iv (rrt_typemask)
332			const_iv (_qtf_deref)
333			const_iv (_qtf_mail822)
334			const_iv (r_unknown)
335			const_iv (r_none)
336			const_iv (r_a)
337			const_iv (r_ns_raw)
338			const_iv (r_ns)
339			const_iv (r_cname)
340			const_iv (r_soa_raw)
341			const_iv (r_soa)
342			const_iv (r_ptr_raw)
343			const_iv (r_ptr)
344			const_iv (r_hinfo)
345			const_iv (r_mx_raw)
346			const_iv (r_mx)
347			const_iv (r_txt)
348			const_iv (r_rp_raw)
349			const_iv (r_rp)
350			const_iv (r_srv_raw)
351			const_iv (r_srv)
352			const_iv (r_addr)
353
354			const_iv (s_ok)
355			const_iv (s_nomemory)
356			const_iv (s_unknownrrtype)
357			const_iv (s_systemfail)
358			const_iv (s_max_localfail)
359			const_iv (s_timeout)
360			const_iv (s_allservfail)
361			const_iv (s_norecurse)
362			const_iv (s_invalidresponse)
363			const_iv (s_unknownformat)
364			const_iv (s_max_remotefail)
365			const_iv (s_rcodeservfail)
366			const_iv (s_rcodeformaterror)
367			const_iv (s_rcodenotimplemented)
368			const_iv (s_rcoderefused)
369			const_iv (s_rcodeunknown)
370			const_iv (s_max_tempfail)
371			const_iv (s_inconsistent)
372			const_iv (s_prohibitedcname)
373			const_iv (s_answerdomaininvalid)
374			const_iv (s_answerdomaintoolong)
375			const_iv (s_invaliddata)
376			const_iv (s_max_misconfig)
377			const_iv (s_querydomainwrong)
378			const_iv (s_querydomaininvalid)
379			const_iv (s_querydomaintoolong)
380			const_iv (s_max_misquery)
381			const_iv (s_nxdomain)
382			const_iv (s_nodata)
383			const_iv (s_max_permfail)
384			};
385
386			for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
387			newCONSTSUB (stash, (char *)civ->name, newSViv (civ->iv));
388
389			I_EV_API ("EV::ADNS");
390
391			ev_prepare_init (&prepare_ev, prepare_cb); ev_prepare_start (EV_DEFAULT_ &prepare_ev);
392			ev_unref ();
393
394			ev_init (&tw, timer_cb);
395
396			adns_init (&ads, adns_if_noenv \| adns_if_noerrprint \| adns_if_noserverwarn \| adns_if_noautosys, 0);
397			}
398
399	root	1.3	void submit (char owner, int type, int flags, SV cb)
400	root	1.2	PPCODE:
401	root	1.1	{
402	root	1.2	SV *csv = NEWSV (0, sizeof (struct ctx));
403			struct ctx c = (struct ctx )SvPVX (csv);
404			int r = adns_submit (ads, owner, type, flags, (void *)c, &c->query);
405	root	1.1
406			if (r)
407			{
408	root	1.2	SvREFCNT_dec (csv);
409	root	1.6	errno = r;
410	root	1.1	XSRETURN_EMPTY;
411			}
412	root	1.2	else
413			{
414	root	1.3	ev_ref ();
415	root	1.2	SvPOK_only (csv);
416			SvCUR_set (csv, sizeof (struct ctx));
417	root	1.6
418	root	1.2	c->self = csv;
419			c->cb = newSVsv (cb);
420
421			if (GIMME_V != G_VOID)
422			{
423	root	1.5	csv = sv_2mortal (newRV_inc (csv));
424	root	1.2	sv_bless (csv, stash);
425			XPUSHs (csv);
426			}
427			}
428	root	1.1	}
429
430	root	1.2	void DESTROY (SV *req)
431	root	1.6	ALIAS:
432			cancel = 1
433	root	1.2	CODE:
434			{
435			struct ctx *c;
436
437			if (!(SvROK (req) && SvOBJECT (SvRV (req))
438			&& (SvSTASH (SvRV (req)) == stash)))
439			croak ("object is not of type EV::ADNS");
440
441			c = (struct ctx *)SvPVX (SvRV (req));
442
443			if (c->cb)
444			{
445	root	1.3	ev_unref ();
446	root	1.6	SvREFCNT_dec (c->cb);
447			c->cb = 0;
448	root	1.2	adns_cancel (c->query);
449	root	1.6	SvREFCNT_dec (c->self);
450	root	1.2	}
451			}
452
453
454	root	1.1
455