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addeed some dns client code

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hyung-hwan 2020-02-27 08:40:39 +00:00
parent 71ffd4ce17
commit 72689c179b
1 changed files with 79 additions and 15 deletions
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94
mio/lib/dns-cli.c
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@ -143,9 +143,73 @@ printf ("ON TCP READ DATA>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> %d\n", dlen);
return 0;
}
static void on_tcp_reply_timeout (mio_t* mio, const mio_ntime_t* now, mio_tmrjob_t* job)
{
mio_dns_msg_t* reqmsg = (mio_dns_msg_t*)job->ctx;
dnc_dns_msg_xtn_t* msgxtn = dnc_dns_msg_getxtn(reqmsg);
mio_dev_sck_t* dev = (mio_dev_sck_t*)msgxtn->dev;
mio_svc_dnc_t* dnc = ((dnc_sck_xtn_t*)mio_dev_sck_getxtn(dev))->dnc;
MIO_ASSERT (mio, msgxtn->rtmridx == MIO_TMRIDX_INVALID);
MIO_ASSERT (mio, dev == dnc->tcp_sck);
MIO_DEBUG0 (mio, "*** TIMEOUT ==> unable to receive dns response in time over TCP...\n");
if (MIO_LIKELY(msgxtn->on_reply))
msgxtn->on_reply (dnc, reqmsg, MIO_ETMOUT, MIO_NULL, 0);
//release_dns_msg (dnc, reqmsg);
mio_dev_sck_halt(dev);
}
static int on_tcp_write (mio_dev_sck_t* dev, mio_iolen_t wrlen, void* wrctx, const mio_skad_t* dstaddr)
{
mio_t* mio = dev->mio;
mio_dns_msg_t* msg = (mio_dns_msg_t*)wrctx;
dnc_dns_msg_xtn_t* msgxtn = dnc_dns_msg_getxtn(msg);
mio_svc_dnc_t* dnc = ((dnc_sck_xtn_t*)mio_dev_sck_getxtn(dev))->dnc;
printf ("ON TCP WRITE >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
if (wrlen <= -1)
{
if (MIO_LIKELY(msgxtn->on_reply))
msgxtn->on_reply (dnc, msg, mio_geterrnum(mio), MIO_NULL, 0);
// release_dns_msg (dnc, msg);
mio_dev_sck_halt (dev);
}
else if (mio_dns_msg_to_pkt(msg)->qr == 0 && msgxtn->rmaxtries > 0)
{
/* question. schedule to wait for response */
mio_tmrjob_t tmrjob;
MIO_MEMSET (&tmrjob, 0, MIO_SIZEOF(tmrjob));
tmrjob.ctx = msg;
mio_gettime (mio, &tmrjob.when);
MIO_ADD_NTIME (&tmrjob.when, &tmrjob.when, &msgxtn->rtmout);
tmrjob.handler = on_tcp_reply_timeout;
tmrjob.idxptr = &msgxtn->rtmridx;
msgxtn->rtmridx = mio_instmrjob(mio, &tmrjob);
if (msgxtn->rtmridx == MIO_TMRIDX_INVALID)
{
/* call the callback to indicate this operation failure in the middle of transaction */
if (MIO_LIKELY(msgxtn->on_reply))
msgxtn->on_reply (dnc, msg, mio_geterrnum(mio), MIO_NULL, 0);
//release_dns_msg (dnc, msg);
mio_dev_sck_halt (dev);
MIO_DEBUG0 (mio, "unable to schedule timeout...\n");
}
}
else
{
/* sent an answer - we don't need this any more */
/* we don't call the on_reply callback stored in msg->ctx as this is not a reply context */
// release_dns_msg (dnc, msg);
mio_dev_sck_halt (dev);
}
return 0;
}
@ -187,20 +251,18 @@ static void on_tcp_disconnect (mio_dev_sck_t* dev)
int status;
/* UNABLE TO CONNECT or CONNECT TIMED OUT */
if (reqmsgxtn->rtries <= 0)
{
status = mio_geterrnum(mio);
}
else
{
status = mio_geterrnum(mio);
}
status = mio_geterrnum(mio);
MIO_DEBUG2 (mio, "TCP UNABLED TO CONNECT .. OR DISCONNECTED ... ---> %d -> %js\n", status, mio_errnum_to_errstr(status));
if (MIO_LIKELY(reqmsgxtn->on_reply))
reqmsgxtn->on_reply (dnc, reqmsg, status, MIO_NULL, 0);
release_dns_msg (dnc, reqmsg);
/* let's forget about the tcp socket */
dnc->tcp_sck = MIO_NULL;
}
static int switch_reqmsg_transport_to_tcp (mio_svc_dnc_t* dnc, mio_dns_msg_t* reqmsg)
@ -249,14 +311,9 @@ static int switch_reqmsg_transport_to_tcp (mio_svc_dnc_t* dnc, mio_dns_msg_t* re
if (mio_dev_sck_connect(dnc->tcp_sck, &cinfo) <= -1) return -1; /* the connect request hasn't been honored. */
/* switch the belonging device to the tcp socket since the connect request has been acknowledged. */
MIO_ASSERT (mio, reqmsgxtn->rtmridx == MIO_TMRIDX_INVALID); /* ensure no timer job scheduled at this moment */
reqmsgxtn->dev = (mio_dev_t*)dnc->tcp_sck;
reqmsgxtn->rtries = 0;
if (reqmsgxtn->rtmridx != MIO_TMRIDX_INVALID)
{
/* unschedule a timer job added for udp transport if any */
mio_deltmrjob (mio, reqmsgxtn->rtmridx);
MIO_ASSERT (mio, reqmsgxtn->rtmridx == MIO_TMRIDX_INVALID);
}
reqmsgxtn->rtries = 0; /* i don't retry with tcp. so reset this to 0 */
return 0;
}
@ -296,6 +353,13 @@ static int on_udp_read (mio_dev_sck_t* dev, const void* data, mio_iolen_t dlen,
if (dev == (mio_dev_sck_t*)reqmsgxtn->dev && pkt->id == reqpkt->id && mio_equal_skads(&reqmsgxtn->servaddr, srcaddr, 0))
{
if (reqmsgxtn->rtmridx != MIO_TMRIDX_INVALID)
{
/* unschedule a timer job if any */
mio_deltmrjob (mio, reqmsgxtn->rtmridx);
MIO_ASSERT (mio, reqmsgxtn->rtmridx == MIO_TMRIDX_INVALID);
}
////////////////////////
pkt->tc = 1;
////////////////////////