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handled MIO_DNS_RRT_Q_ANY/MAILA/MAILB/AXFR in brief mode of dnc resolve

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hyung-hwan 2020-02-14 10:13:45 +00:00
parent 11e50cd5c8
commit 20de4ae2db
1 changed files with 19 additions and 12 deletions
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29
mio/lib/dns.c
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@ -673,6 +673,20 @@ static void on_dnc_resolve (mio_svc_dnc_t* dnc, mio_dns_msg_t* reqmsg, mio_errnu
if (pi->ancount < 0) goto no_valid_reply; if (pi->ancount < 0) goto no_valid_reply;
/* in the brief mode, we inspect the answer section only */ /* in the brief mode, we inspect the answer section only */
if (reqmsgxtn->qtype == MIO_DNS_RRT_Q_ANY)
{
/* return A or AAAA for ANY in the brief mode */
for (i = 0; i < pi->ancount; i++)
{
if (pi->rr.an[i].rrtype == MIO_DNS_RRT_A || pi->rr.an[i].rrtype == MIO_DNS_RRT_AAAA)
{
match_found:
if (reqmsgxtn->on_resolve) reqmsgxtn->on_resolve (dnc, reqmsg, status, &pi->rr.an[i], MIO_SIZEOF(pi->rr.an[i]));
goto done;
}
}
}
for (i = 0; i < pi->ancount; i++) for (i = 0; i < pi->ancount; i++)
{ {
/* it is a bit time taking to retreive the query type from the packet /* it is a bit time taking to retreive the query type from the packet
@ -681,9 +695,9 @@ static void on_dnc_resolve (mio_svc_dnc_t* dnc, mio_dns_msg_t* reqmsg, mio_errnu
switch (reqmsgxtn->qtype) switch (reqmsgxtn->qtype)
{ {
case MIO_DNS_RRT_Q_ANY: case MIO_DNS_RRT_Q_ANY:
/* if you want to get the full RRs, don't use the brief mode. */ case MIO_DNS_RRT_Q_AFXR: /* AFXR doesn't make sense in the brief mode. just treat it like ANY */
if (pi->rr.an[i].rrtype == MIO_DNS_RRT_A || pi->rr.an[i].rrtype == MIO_DNS_RRT_AAAA) goto match_found; /* no A or AAAA found. so give the first entry in the answer */
break; goto match_found;
case MIO_DNS_RRT_Q_MAILA: case MIO_DNS_RRT_Q_MAILA:
/* if you want to get the full RRs, don't use the brief mode. */ /* if you want to get the full RRs, don't use the brief mode. */
@ -696,17 +710,10 @@ static void on_dnc_resolve (mio_svc_dnc_t* dnc, mio_dns_msg_t* reqmsg, mio_errnu
pi->rr.an[i].rrtype == MIO_DNS_RRT_MR || pi->rr.an[i].rrtype == MIO_DNS_RRT_MINFO) goto match_found; pi->rr.an[i].rrtype == MIO_DNS_RRT_MR || pi->rr.an[i].rrtype == MIO_DNS_RRT_MINFO) goto match_found;
break; break;
case MIO_DNS_RRT_Q_AFXR:
default: default:
if (pi->rr.an[i].rrtype == reqmsgxtn->qtype) if (pi->rr.an[i].rrtype == reqmsgxtn->qtype) goto match_found;
{
match_found:
if (reqmsgxtn->on_resolve) reqmsgxtn->on_resolve (dnc, reqmsg, status, &pi->rr.an[i], MIO_SIZEOF(pi->rr.an[i]));
goto done;
}
break; break;
} }
} }
goto no_valid_reply; goto no_valid_reply;
} }