separated dnc code from dns.c to dns-cli.c
This commit is contained in:
parent
6787ee7841
commit
c620afe4c9
@ -36,6 +36,7 @@ include_HEADERS = \
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lib_LTLIBRARIES = libmio.la
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libmio_la_SOURCES = \
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dns.c \
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dns-cli.c \
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err.c \
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fmt.c \
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fmt-imp.h \
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|
@ -138,12 +138,13 @@ am__DEPENDENCIES_1 =
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am__DEPENDENCIES_2 = $(am__DEPENDENCIES_1)
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libmio_la_DEPENDENCIES = $(am__DEPENDENCIES_2) $(am__DEPENDENCIES_1) \
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$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1)
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am_libmio_la_OBJECTS = libmio_la-dns.lo libmio_la-err.lo \
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libmio_la-fmt.lo libmio_la-mio.lo libmio_la-nwif.lo \
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libmio_la-pro.lo libmio_la-sck.lo libmio_la-skad.lo \
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libmio_la-sys.lo libmio_la-sys-ass.lo libmio_la-sys-err.lo \
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libmio_la-sys-log.lo libmio_la-sys-mux.lo libmio_la-sys-tim.lo \
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libmio_la-tmr.lo libmio_la-utf8.lo libmio_la-utl.lo
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am_libmio_la_OBJECTS = libmio_la-dns.lo libmio_la-dns-cli.lo \
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libmio_la-err.lo libmio_la-fmt.lo libmio_la-mio.lo \
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libmio_la-nwif.lo libmio_la-pro.lo libmio_la-sck.lo \
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libmio_la-skad.lo libmio_la-sys.lo libmio_la-sys-ass.lo \
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libmio_la-sys-err.lo libmio_la-sys-log.lo libmio_la-sys-mux.lo \
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libmio_la-sys-tim.lo libmio_la-tmr.lo libmio_la-utf8.lo \
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libmio_la-utl.lo
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libmio_la_OBJECTS = $(am_libmio_la_OBJECTS)
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AM_V_lt = $(am__v_lt_@AM_V@)
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am__v_lt_ = $(am__v_lt_@AM_DEFAULT_V@)
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@ -167,11 +168,11 @@ am__v_at_1 =
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DEFAULT_INCLUDES =
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depcomp = $(SHELL) $(top_srcdir)/ac/depcomp
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am__maybe_remake_depfiles = depfiles
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am__depfiles_remade = ./$(DEPDIR)/libmio_la-dns.Plo \
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./$(DEPDIR)/libmio_la-err.Plo ./$(DEPDIR)/libmio_la-fmt.Plo \
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./$(DEPDIR)/libmio_la-mio.Plo ./$(DEPDIR)/libmio_la-nwif.Plo \
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./$(DEPDIR)/libmio_la-pro.Plo ./$(DEPDIR)/libmio_la-sck.Plo \
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./$(DEPDIR)/libmio_la-skad.Plo \
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am__depfiles_remade = ./$(DEPDIR)/libmio_la-dns-cli.Plo \
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./$(DEPDIR)/libmio_la-dns.Plo ./$(DEPDIR)/libmio_la-err.Plo \
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./$(DEPDIR)/libmio_la-fmt.Plo ./$(DEPDIR)/libmio_la-mio.Plo \
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./$(DEPDIR)/libmio_la-nwif.Plo ./$(DEPDIR)/libmio_la-pro.Plo \
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./$(DEPDIR)/libmio_la-sck.Plo ./$(DEPDIR)/libmio_la-skad.Plo \
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./$(DEPDIR)/libmio_la-sys-ass.Plo \
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./$(DEPDIR)/libmio_la-sys-err.Plo \
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./$(DEPDIR)/libmio_la-sys-log.Plo \
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@ -411,6 +412,7 @@ include_HEADERS = \
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lib_LTLIBRARIES = libmio.la
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libmio_la_SOURCES = \
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dns.c \
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dns-cli.c \
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err.c \
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fmt.c \
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fmt-imp.h \
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@ -528,6 +530,7 @@ mostlyclean-compile:
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distclean-compile:
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-rm -f *.tab.c
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@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libmio_la-dns-cli.Plo@am__quote@ # am--include-marker
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@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libmio_la-dns.Plo@am__quote@ # am--include-marker
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@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libmio_la-err.Plo@am__quote@ # am--include-marker
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@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libmio_la-fmt.Plo@am__quote@ # am--include-marker
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@ -583,6 +586,13 @@ libmio_la-dns.lo: dns.c
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@AMDEP_TRUE@@am__fastdepCC_FALSE@ DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
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@am__fastdepCC_FALSE@ $(AM_V_CC@am__nodep@)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libmio_la_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -c -o libmio_la-dns.lo `test -f 'dns.c' || echo '$(srcdir)/'`dns.c
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libmio_la-dns-cli.lo: dns-cli.c
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@am__fastdepCC_TRUE@ $(AM_V_CC)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libmio_la_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -MT libmio_la-dns-cli.lo -MD -MP -MF $(DEPDIR)/libmio_la-dns-cli.Tpo -c -o libmio_la-dns-cli.lo `test -f 'dns-cli.c' || echo '$(srcdir)/'`dns-cli.c
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@am__fastdepCC_TRUE@ $(AM_V_at)$(am__mv) $(DEPDIR)/libmio_la-dns-cli.Tpo $(DEPDIR)/libmio_la-dns-cli.Plo
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@AMDEP_TRUE@@am__fastdepCC_FALSE@ $(AM_V_CC)source='dns-cli.c' object='libmio_la-dns-cli.lo' libtool=yes @AMDEPBACKSLASH@
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@AMDEP_TRUE@@am__fastdepCC_FALSE@ DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
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@am__fastdepCC_FALSE@ $(AM_V_CC@am__nodep@)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libmio_la_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -c -o libmio_la-dns-cli.lo `test -f 'dns-cli.c' || echo '$(srcdir)/'`dns-cli.c
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libmio_la-err.lo: err.c
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@am__fastdepCC_TRUE@ $(AM_V_CC)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libmio_la_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -MT libmio_la-err.lo -MD -MP -MF $(DEPDIR)/libmio_la-err.Tpo -c -o libmio_la-err.lo `test -f 'err.c' || echo '$(srcdir)/'`err.c
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@am__fastdepCC_TRUE@ $(AM_V_at)$(am__mv) $(DEPDIR)/libmio_la-err.Tpo $(DEPDIR)/libmio_la-err.Plo
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@ -850,7 +860,8 @@ clean-am: clean-generic clean-libLTLIBRARIES clean-libtool \
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mostlyclean-am
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distclean: distclean-am
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-rm -f ./$(DEPDIR)/libmio_la-dns.Plo
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-rm -f ./$(DEPDIR)/libmio_la-dns-cli.Plo
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-rm -f ./$(DEPDIR)/libmio_la-dns.Plo
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-rm -f ./$(DEPDIR)/libmio_la-err.Plo
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-rm -f ./$(DEPDIR)/libmio_la-fmt.Plo
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-rm -f ./$(DEPDIR)/libmio_la-mio.Plo
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@ -913,7 +924,8 @@ install-ps-am:
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installcheck-am:
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maintainer-clean: maintainer-clean-am
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-rm -f ./$(DEPDIR)/libmio_la-dns.Plo
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-rm -f ./$(DEPDIR)/libmio_la-dns-cli.Plo
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-rm -f ./$(DEPDIR)/libmio_la-dns.Plo
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-rm -f ./$(DEPDIR)/libmio_la-err.Plo
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-rm -f ./$(DEPDIR)/libmio_la-fmt.Plo
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-rm -f ./$(DEPDIR)/libmio_la-mio.Plo
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573
mio/lib/dns-cli.c
Normal file
573
mio/lib/dns-cli.c
Normal file
@ -0,0 +1,573 @@
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/*
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* $Id$
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*
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Copyright (c) 2016-2020 Chung, Hyung-Hwan. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR
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IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WAfRRANTIES
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OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <mio-dns.h>
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#include <mio-sck.h>
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#include "mio-prv.h"
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#include <netinet/in.h>
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struct mio_svc_dns_t
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{
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MIO_SVC_HEADERS;
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/*MIO_DNS_SVC_HEADERS;*/
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};
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struct mio_svc_dnc_t
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{
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MIO_SVC_HEADERS;
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/*MIO_DNS_SVC_HEADERS;*/
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mio_dev_sck_t* udp_sck;
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mio_dev_sck_t* tcp_sck;
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mio_skad_t serv_addr;
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mio_ntime_t send_tmout;
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mio_ntime_t reply_tmout; /* default reply timeout */
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mio_oow_t reply_tmout_max_tries;
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mio_oow_t seq;
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mio_dns_msg_t* pending_req;
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};
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struct dnc_sck_xtn_t
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{
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mio_svc_dnc_t* dnc;
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};
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typedef struct dnc_sck_xtn_t dnc_sck_xtn_t;
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/* ----------------------------------------------------------------------- */
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struct dnc_dns_msg_xtn_t
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{
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mio_dev_t* dev;
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mio_tmridx_t rtmridx;
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mio_dns_msg_t* prev;
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mio_dns_msg_t* next;
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mio_skad_t servaddr;
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mio_svc_dnc_on_reply_t on_reply;
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mio_ntime_t wtmout;
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mio_ntime_t rtmout;
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int rmaxtries; /* maximum number of tries to receive a reply */
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int rtries; /* number of tries made so far */
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};
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typedef struct dnc_dns_msg_xtn_t dnc_dns_msg_xtn_t;
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#if defined(MIO_HAVE_INLINE)
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static MIO_INLINE dnc_dns_msg_xtn_t* dnc_dns_msg_getxtn(mio_dns_msg_t* msg) { return (dnc_dns_msg_xtn_t*)((mio_uint8_t*)mio_dns_msg_to_pkt(msg) + msg->pktalilen); }
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#else
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# define dnc_dns_msg_getxtn(msg) ((dnc_dns_msg_xtn_t*)((mio_uint8_t*)mio_dns_msg_to_pkt(msg) + msg->pktalilen))
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#endif
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static mio_dns_msg_t* build_dns_msg (mio_svc_dnc_t* dnc, mio_dns_bhdr_t* bdns, mio_dns_bqr_t* qr, mio_oow_t qr_count, mio_dns_brr_t* rr, mio_oow_t rr_count, mio_dns_bedns_t* edns, mio_oow_t xtnsize)
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{
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mio_dns_msg_t* msg;
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dnc_dns_msg_xtn_t* msgxtn;
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msg = mio_dns_make_msg(dnc->mio, bdns, qr, qr_count, rr, rr_count, edns, MIO_SIZEOF(*msgxtn) + xtnsize);
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if (msg)
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{
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if (bdns->id < 0)
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{
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mio_dns_pkt_t* pkt = mio_dns_msg_to_pkt(msg);
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pkt->id = mio_hton16(dnc->seq);
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dnc->seq++;
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}
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msgxtn = dnc_dns_msg_getxtn(msg);
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msgxtn->dev = (mio_dev_t*)dnc->udp_sck;
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msgxtn->rtmridx = MIO_TMRIDX_INVALID;
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}
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return msg;
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}
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static MIO_INLINE void chain_pending_dns_reqmsg (mio_svc_dnc_t* dnc, mio_dns_msg_t* msg)
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{
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if (dnc->pending_req)
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{
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dnc_dns_msg_getxtn(dnc->pending_req)->prev = msg;
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dnc_dns_msg_getxtn(msg)->next = dnc->pending_req;
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}
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dnc->pending_req = msg;
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}
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static MIO_INLINE void unchain_pending_dns_reqmsg (mio_svc_dnc_t* dnc, mio_dns_msg_t* msg)
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{
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dnc_dns_msg_xtn_t* msgxtn = dnc_dns_msg_getxtn(msg);
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if (msgxtn->next) dnc_dns_msg_getxtn(msgxtn->next)->prev = msgxtn->prev;
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if (msgxtn->prev) dnc_dns_msg_getxtn(msgxtn->prev)->next = msgxtn->next;
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else dnc->pending_req = msgxtn->next;
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}
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static void release_dns_msg (mio_svc_dnc_t* dnc, mio_dns_msg_t* msg)
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{
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mio_t* mio = dnc->mio;
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dnc_dns_msg_xtn_t* msgxtn = dnc_dns_msg_getxtn(msg);
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MIO_DEBUG1 (mio, "releasing dns msg %d\n", (int)mio_ntoh16(mio_dns_msg_to_pkt(msg)->id));
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if (msg == dnc->pending_req || msgxtn->next || msgxtn->prev)
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{
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/* it's chained in the pending request. unchain it */
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unchain_pending_dns_reqmsg (dnc, msg);
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}
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/* TODO: add it to the free msg list instead of just freeing it. */
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if (msgxtn->rtmridx != MIO_TMRIDX_INVALID)
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{
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mio_deltmrjob (mio, msgxtn->rtmridx);
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MIO_ASSERT (mio, msgxtn->rtmridx == MIO_TMRIDX_INVALID);
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}
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mio_dns_free_msg (dnc->mio, msg);
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}
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static int on_udp_read (mio_dev_sck_t* dev, const void* data, mio_iolen_t dlen, const mio_skad_t* srcaddr)
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{
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mio_t* mio = dev->mio;
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mio_svc_dnc_t* dnc = ((dnc_sck_xtn_t*)mio_dev_sck_getxtn(dev))->dnc;
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mio_dns_pkt_t* pkt;
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mio_dns_msg_t* reqmsg;
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mio_uint16_t id;
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if (MIO_UNLIKELY(dlen < MIO_SIZEOF(*pkt)))
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{
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MIO_DEBUG0 (mio, "dns packet too small from ....\n"); /* TODO: add source packet */
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return 0; /* drop */
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}
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pkt = (mio_dns_pkt_t*)data;
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if (!pkt->qr)
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{
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MIO_DEBUG0 (mio, "dropping dns request received ...\n"); /* TODO: add source info */
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return 0; /* drop request */
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}
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id = mio_ntoh16(pkt->id);
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/* if id doesn't match one of the pending requests sent, drop it */
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/* TODO: improve performance of dns response matching*/
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reqmsg = dnc->pending_req;
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while (reqmsg)
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{
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mio_dns_pkt_t* reqpkt = mio_dns_msg_to_pkt(reqmsg);
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dnc_dns_msg_xtn_t* reqmsgxtn = dnc_dns_msg_getxtn(reqmsg);
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if (dev == (mio_dev_sck_t*)reqmsgxtn->dev && pkt->id == reqpkt->id && mio_equal_skads(&reqmsgxtn->servaddr, srcaddr, 0))
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{
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if (pkt->tc) /* truncated */
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{
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/* TODO: add an option for this behavior */
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/* TODO: switch to tc ... send the same request over tcp... */
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}
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MIO_DEBUG1 (mio, "received dns response...id %d\n", id);
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if (MIO_LIKELY(reqmsgxtn->on_reply))
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reqmsgxtn->on_reply (dnc, reqmsg, MIO_ENOERR, data, dlen);
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release_dns_msg (dnc, reqmsg);
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return 0;
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}
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reqmsg = reqmsgxtn->next;
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}
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/* the response id didn't match the ID of pending requests - need to wait longer? */
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MIO_DEBUG1 (mio, "unknown dns response... %d\n", pkt->id); /* TODO: add source info */
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return 0;
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}
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static void on_udp_reply_timeout (mio_t* mio, const mio_ntime_t* now, mio_tmrjob_t* job)
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{
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mio_dns_msg_t* reqmsg = (mio_dns_msg_t*)job->ctx;
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dnc_dns_msg_xtn_t* msgxtn = dnc_dns_msg_getxtn(reqmsg);
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mio_dev_sck_t* dev = (mio_dev_sck_t*)msgxtn->dev;
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mio_svc_dnc_t* dnc = ((dnc_sck_xtn_t*)mio_dev_sck_getxtn(dev))->dnc;
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MIO_ASSERT (mio, msgxtn->rtmridx == MIO_TMRIDX_INVALID);
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MIO_DEBUG0 (mio, "*** TIMEOUT ==> unable to receive dns response in time...\n");
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if (msgxtn->rtries < msgxtn->rmaxtries)
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{
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mio_ntime_t* tmout;
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tmout = MIO_IS_POS_NTIME(&msgxtn->wtmout)? &msgxtn->wtmout: MIO_NULL;
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if (mio_dev_sck_timedwrite(dnc->udp_sck, mio_dns_msg_to_pkt(reqmsg), reqmsg->pktlen, tmout, reqmsg, &msgxtn->servaddr) <= -1)
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{
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if (MIO_LIKELY(msgxtn->on_reply))
|
||||
msgxtn->on_reply (dnc, reqmsg, MIO_ETMOUT, MIO_NULL, 0);
|
||||
|
||||
release_dns_msg (dnc, reqmsg);
|
||||
return;
|
||||
}
|
||||
|
||||
printf (">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> RESENT REQUEST >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> \n");
|
||||
}
|
||||
else
|
||||
{
|
||||
if (MIO_LIKELY(msgxtn->on_reply))
|
||||
msgxtn->on_reply (dnc, reqmsg, MIO_ETMOUT, MIO_NULL, 0);
|
||||
release_dns_msg (dnc, reqmsg);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static int on_udp_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;
|
||||
|
||||
MIO_DEBUG1 (mio, "sent dns message %d\n", (int)mio_ntoh16(mio_dns_msg_to_pkt(msg)->id));
|
||||
|
||||
MIO_ASSERT (mio, dev == (mio_dev_sck_t*)msgxtn->dev);
|
||||
|
||||
if (wrlen <= -1)
|
||||
{
|
||||
/* write has timed out or an error has occurred */
|
||||
if (MIO_LIKELY(msgxtn->on_reply))
|
||||
msgxtn->on_reply (dnc, msg, mio_geterrnum(mio), MIO_NULL, 0);
|
||||
release_dns_msg (dnc, msg);
|
||||
}
|
||||
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_udp_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_DEBUG0 (mio, "unable to schedule timeout...\n");
|
||||
}
|
||||
else
|
||||
{
|
||||
if (msgxtn->rtries == 0)
|
||||
{
|
||||
/* this is the first wait */
|
||||
|
||||
/* TODO: improve performance. hashing by id? */
|
||||
/* chain it to the peing request list */
|
||||
chain_pending_dns_reqmsg (dnc, msg);
|
||||
}
|
||||
|
||||
msgxtn->rtries++;
|
||||
}
|
||||
}
|
||||
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);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void on_udp_connect (mio_dev_sck_t* dev)
|
||||
{
|
||||
}
|
||||
|
||||
static void on_udp_disconnect (mio_dev_sck_t* dev)
|
||||
{
|
||||
}
|
||||
|
||||
mio_svc_dnc_t* mio_svc_dnc_start (mio_t* mio, const mio_skad_t* serv_addr, const mio_skad_t* bind_addr, const mio_ntime_t* send_tmout, const mio_ntime_t* reply_tmout, mio_oow_t reply_tmout_max_tries)
|
||||
{
|
||||
mio_svc_dnc_t* dnc = MIO_NULL;
|
||||
mio_dev_sck_make_t mkinfo;
|
||||
dnc_sck_xtn_t* xtn;
|
||||
|
||||
dnc = (mio_svc_dnc_t*)mio_callocmem(mio, MIO_SIZEOF(*dnc));
|
||||
if (!dnc) goto oops;
|
||||
|
||||
dnc->mio = mio;
|
||||
dnc->stop = mio_svc_dnc_stop;
|
||||
dnc->serv_addr = *serv_addr;
|
||||
dnc->send_tmout = *send_tmout;
|
||||
dnc->reply_tmout = *reply_tmout;
|
||||
dnc->reply_tmout_max_tries = reply_tmout_max_tries;
|
||||
|
||||
MIO_MEMSET (&mkinfo, 0, MIO_SIZEOF(mkinfo));
|
||||
switch (mio_skad_family(serv_addr))
|
||||
{
|
||||
case MIO_AF_INET:
|
||||
mkinfo.type = MIO_DEV_SCK_UDP4;
|
||||
break;
|
||||
|
||||
case MIO_AF_INET6:
|
||||
mkinfo.type = MIO_DEV_SCK_UDP6;
|
||||
break;
|
||||
|
||||
default:
|
||||
mio_seterrnum (mio, MIO_EINVAL);
|
||||
goto oops;
|
||||
}
|
||||
mkinfo.on_write = on_udp_write;
|
||||
mkinfo.on_read = on_udp_read;
|
||||
mkinfo.on_connect = on_udp_connect;
|
||||
mkinfo.on_disconnect = on_udp_disconnect;
|
||||
dnc->udp_sck = mio_dev_sck_make(mio, MIO_SIZEOF(*xtn), &mkinfo);
|
||||
if (!dnc->udp_sck) goto oops;
|
||||
|
||||
xtn = (dnc_sck_xtn_t*)mio_dev_sck_getxtn(dnc->udp_sck);
|
||||
xtn->dnc = dnc;
|
||||
|
||||
if (bind_addr) /* TODO: get mio_dev_sck_bind_t? instead of bind_addr? */
|
||||
{
|
||||
mio_dev_sck_bind_t bi;
|
||||
MIO_MEMSET (&bi, 0, MIO_SIZEOF(bi));
|
||||
bi.localaddr = *bind_addr;
|
||||
if (mio_dev_sck_bind(dnc->udp_sck, &bi) <= -1) goto oops;
|
||||
}
|
||||
|
||||
MIO_SVC_REGISTER (mio, (mio_svc_t*)dnc);
|
||||
return dnc;
|
||||
|
||||
oops:
|
||||
if (dnc)
|
||||
{
|
||||
if (dnc->udp_sck) mio_dev_sck_kill (dnc->udp_sck);
|
||||
mio_freemem (mio, dnc);
|
||||
}
|
||||
return MIO_NULL;
|
||||
}
|
||||
|
||||
void mio_svc_dnc_stop (mio_svc_dnc_t* dnc)
|
||||
{
|
||||
mio_t* mio = dnc->mio;
|
||||
if (dnc->udp_sck) mio_dev_sck_kill (dnc->udp_sck);
|
||||
MIO_SVC_UNREGISTER (mio, dnc);
|
||||
while (dnc->pending_req) release_dns_msg (dnc, dnc->pending_req);
|
||||
mio_freemem (mio, dnc);
|
||||
}
|
||||
|
||||
|
||||
mio_dns_msg_t* mio_svc_dnc_sendmsg (mio_svc_dnc_t* dnc, mio_dns_bhdr_t* bdns, mio_dns_bqr_t* qr, mio_oow_t qr_count, mio_dns_brr_t* rr, mio_oow_t rr_count, mio_dns_bedns_t* edns, mio_svc_dnc_on_reply_t on_reply, mio_oow_t xtnsize)
|
||||
{
|
||||
/* send a request or a response */
|
||||
mio_dns_msg_t* msg;
|
||||
dnc_dns_msg_xtn_t* msgxtn;
|
||||
mio_ntime_t* tmout;
|
||||
|
||||
msg = build_dns_msg(dnc, bdns, qr, qr_count, rr, rr_count, edns, MIO_SIZEOF(*msgxtn) + xtnsize);
|
||||
if (!msg) return MIO_NULL;
|
||||
|
||||
msgxtn = dnc_dns_msg_getxtn(msg);
|
||||
msgxtn->on_reply = on_reply;
|
||||
msgxtn->wtmout = dnc->send_tmout;
|
||||
msgxtn->rtmout = dnc->reply_tmout;
|
||||
msgxtn->rmaxtries = dnc->reply_tmout_max_tries;
|
||||
msgxtn->rtries = 0;
|
||||
msgxtn->servaddr = dnc->serv_addr;
|
||||
|
||||
/* TODO: optionally, override dnc->serv_addr and use the target address passed as a parameter */
|
||||
tmout = MIO_IS_POS_NTIME(&msgxtn->wtmout)? &msgxtn->wtmout: MIO_NULL;
|
||||
if (mio_dev_sck_timedwrite(dnc->udp_sck, mio_dns_msg_to_pkt(msg), msg->pktlen, tmout, msg, &msgxtn->servaddr) <= -1)
|
||||
{
|
||||
release_dns_msg (dnc, msg);
|
||||
return MIO_NULL;
|
||||
}
|
||||
|
||||
return msg;
|
||||
}
|
||||
|
||||
mio_dns_msg_t* mio_svc_dnc_sendreq (mio_svc_dnc_t* dnc, mio_dns_bhdr_t* bdns, mio_dns_bqr_t* qr, mio_dns_bedns_t* edns, mio_svc_dnc_on_reply_t on_reply, mio_oow_t xtnsize)
|
||||
{
|
||||
/* send a request without resource records */
|
||||
if (bdns->rcode != MIO_DNS_RCODE_NOERROR)
|
||||
{
|
||||
mio_seterrnum (dnc->mio, MIO_EINVAL);
|
||||
return MIO_NULL;
|
||||
}
|
||||
|
||||
return mio_svc_dnc_sendmsg(dnc, bdns, qr, 1, MIO_NULL, 0, edns, on_reply, xtnsize);
|
||||
}
|
||||
|
||||
/* ----------------------------------------------------------------------- */
|
||||
|
||||
|
||||
struct dnc_dns_msg_resolve_xtn_t
|
||||
{
|
||||
mio_dns_rrt_t qtype;
|
||||
int flags;
|
||||
mio_svc_dnc_on_resolve_t on_resolve;
|
||||
};
|
||||
typedef struct dnc_dns_msg_resolve_xtn_t dnc_dns_msg_resolve_xtn_t;
|
||||
|
||||
#if defined(MIO_HAVE_INLINE)
|
||||
static MIO_INLINE dnc_dns_msg_resolve_xtn_t* dnc_dns_msg_resolve_getxtn(mio_dns_msg_t* msg) { return ((dnc_dns_msg_resolve_xtn_t*)((mio_uint8_t*)dnc_dns_msg_getxtn(msg) + MIO_SIZEOF(dnc_dns_msg_xtn_t))); }
|
||||
#else
|
||||
# define dnc_dns_msg_resolve_getxtn(msg) ((dnc_dns_msg_resolve_xtn_t*)((mio_uint8_t*)dnc_dns_msg_getxtn(msg) + MIO_SIZEOF(dnc_dns_msg_xtn_t)))
|
||||
#endif
|
||||
|
||||
static void on_dnc_resolve (mio_svc_dnc_t* dnc, mio_dns_msg_t* reqmsg, mio_errnum_t status, const void* data, mio_oow_t dlen)
|
||||
{
|
||||
mio_t* mio = mio_svc_dnc_getmio(dnc);
|
||||
mio_dns_pkt_info_t* pi = MIO_NULL;
|
||||
dnc_dns_msg_resolve_xtn_t* reqmsgxtn = dnc_dns_msg_resolve_getxtn(reqmsg);
|
||||
|
||||
if (!(reqmsgxtn->flags & MIO_SVC_DNC_RESOLVE_FLAG_BRIEF))
|
||||
{
|
||||
/* the full reply packet is requested. no transformation is required */
|
||||
if (reqmsgxtn->on_resolve) reqmsgxtn->on_resolve(dnc, reqmsg, status, data, dlen);
|
||||
return;
|
||||
}
|
||||
|
||||
if (data)
|
||||
{
|
||||
mio_uint32_t i;
|
||||
|
||||
MIO_ASSERT (mio, status == MIO_ENOERR);
|
||||
|
||||
pi = mio_dns_make_packet_info(mio, data, dlen);
|
||||
if (!pi)
|
||||
{
|
||||
status = mio_geterrnum(mio);
|
||||
goto no_valid_reply;
|
||||
}
|
||||
|
||||
if (pi->hdr.rcode != MIO_DNS_RCODE_NOERROR)
|
||||
{
|
||||
status = MIO_EINVAL;
|
||||
goto no_valid_reply;
|
||||
}
|
||||
|
||||
if (pi->ancount < 0) goto no_valid_reply;
|
||||
|
||||
/* 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++)
|
||||
{
|
||||
/* it is a bit time taking to retreive the query type from the packet
|
||||
* bundled in reqmsg as it requires parsing of the packet. let me use
|
||||
* the query type i stored in the extension space. */
|
||||
switch (reqmsgxtn->qtype)
|
||||
{
|
||||
case MIO_DNS_RRT_Q_ANY:
|
||||
case MIO_DNS_RRT_Q_AFXR: /* AFXR doesn't make sense in the brief mode. just treat it like ANY */
|
||||
/* no A or AAAA found. so give the first entry in the answer */
|
||||
goto match_found;
|
||||
|
||||
case MIO_DNS_RRT_Q_MAILA:
|
||||
/* if you want to get the full RRs, don't use the brief mode. */
|
||||
if (pi->rr.an[i].rrtype == MIO_DNS_RRT_MD || pi->rr.an[i].rrtype == MIO_DNS_RRT_MF) goto match_found;
|
||||
break;
|
||||
|
||||
case MIO_DNS_RRT_Q_MAILB:
|
||||
/* if you want to get the full RRs, don't use the brief mode. */
|
||||
if (pi->rr.an[i].rrtype == MIO_DNS_RRT_MB || pi->rr.an[i].rrtype == MIO_DNS_RRT_MG ||
|
||||
pi->rr.an[i].rrtype == MIO_DNS_RRT_MR || pi->rr.an[i].rrtype == MIO_DNS_RRT_MINFO) goto match_found;
|
||||
break;
|
||||
|
||||
default:
|
||||
if (pi->rr.an[i].rrtype == reqmsgxtn->qtype) goto match_found;
|
||||
break;
|
||||
}
|
||||
}
|
||||
goto no_valid_reply;
|
||||
}
|
||||
else
|
||||
{
|
||||
no_valid_reply:
|
||||
if (reqmsgxtn->on_resolve) reqmsgxtn->on_resolve (dnc, reqmsg, status, MIO_NULL, 0);
|
||||
}
|
||||
|
||||
done:
|
||||
if (pi) mio_dns_free_packet_info(mio_svc_dnc_getmio(dnc), pi);
|
||||
}
|
||||
|
||||
mio_dns_msg_t* mio_svc_dnc_resolve (mio_svc_dnc_t* dnc, const mio_bch_t* qname, mio_dns_rrt_t qtype, int flags, mio_svc_dnc_on_resolve_t on_resolve, mio_oow_t xtnsize)
|
||||
{
|
||||
static mio_dns_bhdr_t qhdr =
|
||||
{
|
||||
-1, /* id */
|
||||
0, /* qr */
|
||||
MIO_DNS_OPCODE_QUERY, /* opcode */
|
||||
0, /* aa */
|
||||
0, /* tc */
|
||||
1, /* rd */
|
||||
0, /* ra */
|
||||
0, /* ad */
|
||||
0, /* cd */
|
||||
MIO_DNS_RCODE_NOERROR /* rcode */
|
||||
};
|
||||
|
||||
static mio_dns_bedns_t qedns =
|
||||
{
|
||||
4096, /* uplen */
|
||||
|
||||
0, /* edns version */
|
||||
0, /* dnssec ok */
|
||||
|
||||
0, /* number of edns options */
|
||||
MIO_NULL
|
||||
};
|
||||
|
||||
mio_dns_bqr_t qr;
|
||||
mio_dns_msg_t* reqmsg;
|
||||
dnc_dns_msg_resolve_xtn_t* reqmsgxtn;
|
||||
|
||||
qr.qname = (mio_bch_t*)qname;
|
||||
qr.qtype = qtype;
|
||||
qr.qclass = MIO_DNS_RRC_IN;
|
||||
|
||||
reqmsg = mio_svc_dnc_sendmsg(dnc, &qhdr, &qr, 1, MIO_NULL, 0, &qedns, on_dnc_resolve, MIO_SIZEOF(*reqmsgxtn) + xtnsize);
|
||||
if (reqmsg)
|
||||
{
|
||||
reqmsgxtn = dnc_dns_msg_resolve_getxtn(reqmsg);
|
||||
reqmsgxtn->on_resolve = on_resolve;
|
||||
reqmsgxtn->qtype = qtype;
|
||||
reqmsgxtn->flags = flags;
|
||||
}
|
||||
|
||||
return reqmsg;
|
||||
}
|
549
mio/lib/dns.c
549
mio/lib/dns.c
@ -24,41 +24,9 @@
|
||||
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
#include <mio-dns.h>
|
||||
#include <mio-sck.h>
|
||||
#include "mio-dns.h"
|
||||
#include "mio-prv.h"
|
||||
|
||||
#include <netinet/in.h>
|
||||
|
||||
struct mio_svc_dns_t
|
||||
{
|
||||
MIO_SVC_HEADERS;
|
||||
/*MIO_DNS_SVC_HEADERS;*/
|
||||
};
|
||||
|
||||
struct mio_svc_dnc_t
|
||||
{
|
||||
MIO_SVC_HEADERS;
|
||||
/*MIO_DNS_SVC_HEADERS;*/
|
||||
|
||||
mio_dev_sck_t* udp_sck;
|
||||
mio_dev_sck_t* tcp_sck;
|
||||
mio_skad_t serv_addr;
|
||||
|
||||
mio_ntime_t send_tmout;
|
||||
mio_ntime_t reply_tmout; /* default reply timeout */
|
||||
mio_oow_t reply_tmout_max_tries;
|
||||
|
||||
mio_oow_t seq;
|
||||
mio_dns_msg_t* pending_req;
|
||||
};
|
||||
|
||||
struct dnc_sck_xtn_t
|
||||
{
|
||||
mio_svc_dnc_t* dnc;
|
||||
};
|
||||
typedef struct dnc_sck_xtn_t dnc_sck_xtn_t;
|
||||
|
||||
/* ----------------------------------------------------------------------- */
|
||||
|
||||
#define DN_AT_END(ptr) (ptr[0] == '\0' || (ptr[0] == '.' && ptr[1] == '\0'))
|
||||
@ -126,521 +94,6 @@ static mio_oow_t dn_length (mio_uint8_t* ptr, mio_oow_t len)
|
||||
return curptr - ptr;
|
||||
}
|
||||
|
||||
/* ----------------------------------------------------------------------- */
|
||||
|
||||
struct dnc_dns_msg_xtn_t
|
||||
{
|
||||
mio_dev_t* dev;
|
||||
mio_tmridx_t rtmridx;
|
||||
mio_dns_msg_t* prev;
|
||||
mio_dns_msg_t* next;
|
||||
mio_skad_t servaddr;
|
||||
mio_svc_dnc_on_reply_t on_reply;
|
||||
mio_ntime_t wtmout;
|
||||
mio_ntime_t rtmout;
|
||||
int rmaxtries; /* maximum number of tries to receive a reply */
|
||||
int rtries; /* number of tries made so far */
|
||||
};
|
||||
typedef struct dnc_dns_msg_xtn_t dnc_dns_msg_xtn_t;
|
||||
|
||||
#if defined(MIO_HAVE_INLINE)
|
||||
static MIO_INLINE dnc_dns_msg_xtn_t* dnc_dns_msg_getxtn(mio_dns_msg_t* msg) { return (dnc_dns_msg_xtn_t*)((mio_uint8_t*)mio_dns_msg_to_pkt(msg) + msg->pktalilen); }
|
||||
#else
|
||||
# define dnc_dns_msg_getxtn(msg) ((dnc_dns_msg_xtn_t*)((mio_uint8_t*)mio_dns_msg_to_pkt(msg) + msg->pktalilen))
|
||||
#endif
|
||||
|
||||
static mio_dns_msg_t* build_dns_msg (mio_svc_dnc_t* dnc, mio_dns_bhdr_t* bdns, mio_dns_bqr_t* qr, mio_oow_t qr_count, mio_dns_brr_t* rr, mio_oow_t rr_count, mio_dns_bedns_t* edns, mio_oow_t xtnsize)
|
||||
{
|
||||
mio_dns_msg_t* msg;
|
||||
dnc_dns_msg_xtn_t* msgxtn;
|
||||
|
||||
msg = mio_dns_make_msg(dnc->mio, bdns, qr, qr_count, rr, rr_count, edns, MIO_SIZEOF(*msgxtn) + xtnsize);
|
||||
if (msg)
|
||||
{
|
||||
|
||||
if (bdns->id < 0)
|
||||
{
|
||||
mio_dns_pkt_t* pkt = mio_dns_msg_to_pkt(msg);
|
||||
pkt->id = mio_hton16(dnc->seq);
|
||||
dnc->seq++;
|
||||
}
|
||||
|
||||
msgxtn = dnc_dns_msg_getxtn(msg);
|
||||
msgxtn->dev = (mio_dev_t*)dnc->udp_sck;
|
||||
msgxtn->rtmridx = MIO_TMRIDX_INVALID;
|
||||
}
|
||||
|
||||
return msg;
|
||||
}
|
||||
|
||||
static MIO_INLINE void chain_pending_dns_reqmsg (mio_svc_dnc_t* dnc, mio_dns_msg_t* msg)
|
||||
{
|
||||
if (dnc->pending_req)
|
||||
{
|
||||
dnc_dns_msg_getxtn(dnc->pending_req)->prev = msg;
|
||||
dnc_dns_msg_getxtn(msg)->next = dnc->pending_req;
|
||||
}
|
||||
dnc->pending_req = msg;
|
||||
}
|
||||
|
||||
static MIO_INLINE void unchain_pending_dns_reqmsg (mio_svc_dnc_t* dnc, mio_dns_msg_t* msg)
|
||||
{
|
||||
dnc_dns_msg_xtn_t* msgxtn = dnc_dns_msg_getxtn(msg);
|
||||
if (msgxtn->next) dnc_dns_msg_getxtn(msgxtn->next)->prev = msgxtn->prev;
|
||||
if (msgxtn->prev) dnc_dns_msg_getxtn(msgxtn->prev)->next = msgxtn->next;
|
||||
else dnc->pending_req = msgxtn->next;
|
||||
}
|
||||
|
||||
static void release_dns_msg (mio_svc_dnc_t* dnc, mio_dns_msg_t* msg)
|
||||
{
|
||||
mio_t* mio = dnc->mio;
|
||||
dnc_dns_msg_xtn_t* msgxtn = dnc_dns_msg_getxtn(msg);
|
||||
|
||||
MIO_DEBUG1 (mio, "releasing dns msg %d\n", (int)mio_ntoh16(mio_dns_msg_to_pkt(msg)->id));
|
||||
|
||||
if (msg == dnc->pending_req || msgxtn->next || msgxtn->prev)
|
||||
{
|
||||
/* it's chained in the pending request. unchain it */
|
||||
unchain_pending_dns_reqmsg (dnc, msg);
|
||||
}
|
||||
|
||||
/* TODO: add it to the free msg list instead of just freeing it. */
|
||||
if (msgxtn->rtmridx != MIO_TMRIDX_INVALID)
|
||||
{
|
||||
mio_deltmrjob (mio, msgxtn->rtmridx);
|
||||
MIO_ASSERT (mio, msgxtn->rtmridx == MIO_TMRIDX_INVALID);
|
||||
}
|
||||
|
||||
mio_dns_free_msg (dnc->mio, msg);
|
||||
}
|
||||
|
||||
static int on_udp_read (mio_dev_sck_t* dev, const void* data, mio_iolen_t dlen, const mio_skad_t* srcaddr)
|
||||
{
|
||||
mio_t* mio = dev->mio;
|
||||
mio_svc_dnc_t* dnc = ((dnc_sck_xtn_t*)mio_dev_sck_getxtn(dev))->dnc;
|
||||
mio_dns_pkt_t* pkt;
|
||||
mio_dns_msg_t* reqmsg;
|
||||
mio_uint16_t id;
|
||||
|
||||
if (MIO_UNLIKELY(dlen < MIO_SIZEOF(*pkt)))
|
||||
{
|
||||
MIO_DEBUG0 (mio, "dns packet too small from ....\n"); /* TODO: add source packet */
|
||||
return 0; /* drop */
|
||||
}
|
||||
pkt = (mio_dns_pkt_t*)data;
|
||||
if (!pkt->qr)
|
||||
{
|
||||
MIO_DEBUG0 (mio, "dropping dns request received ...\n"); /* TODO: add source info */
|
||||
return 0; /* drop request */
|
||||
}
|
||||
|
||||
id = mio_ntoh16(pkt->id);
|
||||
|
||||
/* if id doesn't match one of the pending requests sent, drop it */
|
||||
|
||||
/* TODO: improve performance of dns response matching*/
|
||||
reqmsg = dnc->pending_req;
|
||||
while (reqmsg)
|
||||
{
|
||||
mio_dns_pkt_t* reqpkt = mio_dns_msg_to_pkt(reqmsg);
|
||||
dnc_dns_msg_xtn_t* reqmsgxtn = dnc_dns_msg_getxtn(reqmsg);
|
||||
|
||||
if (dev == (mio_dev_sck_t*)reqmsgxtn->dev && pkt->id == reqpkt->id && mio_equal_skads(&reqmsgxtn->servaddr, srcaddr, 0))
|
||||
{
|
||||
if (pkt->tc) /* truncated */
|
||||
{
|
||||
/* TODO: add an option for this behavior */
|
||||
/* TODO: switch to tc ... send the same request over tcp... */
|
||||
}
|
||||
|
||||
MIO_DEBUG1 (mio, "received dns response...id %d\n", id);
|
||||
if (MIO_LIKELY(reqmsgxtn->on_reply))
|
||||
reqmsgxtn->on_reply (dnc, reqmsg, MIO_ENOERR, data, dlen);
|
||||
|
||||
release_dns_msg (dnc, reqmsg);
|
||||
return 0;
|
||||
}
|
||||
reqmsg = reqmsgxtn->next;
|
||||
}
|
||||
|
||||
/* the response id didn't match the ID of pending requests - need to wait longer? */
|
||||
MIO_DEBUG1 (mio, "unknown dns response... %d\n", pkt->id); /* TODO: add source info */
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void on_udp_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_DEBUG0 (mio, "*** TIMEOUT ==> unable to receive dns response in time...\n");
|
||||
if (msgxtn->rtries < msgxtn->rmaxtries)
|
||||
{
|
||||
mio_ntime_t* tmout;
|
||||
|
||||
tmout = MIO_IS_POS_NTIME(&msgxtn->wtmout)? &msgxtn->wtmout: MIO_NULL;
|
||||
if (mio_dev_sck_timedwrite(dnc->udp_sck, mio_dns_msg_to_pkt(reqmsg), reqmsg->pktlen, tmout, reqmsg, &msgxtn->servaddr) <= -1)
|
||||
{
|
||||
if (MIO_LIKELY(msgxtn->on_reply))
|
||||
msgxtn->on_reply (dnc, reqmsg, MIO_ETMOUT, MIO_NULL, 0);
|
||||
|
||||
release_dns_msg (dnc, reqmsg);
|
||||
return;
|
||||
}
|
||||
|
||||
printf (">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> RESENT REQUEST >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> \n");
|
||||
}
|
||||
else
|
||||
{
|
||||
if (MIO_LIKELY(msgxtn->on_reply))
|
||||
msgxtn->on_reply (dnc, reqmsg, MIO_ETMOUT, MIO_NULL, 0);
|
||||
release_dns_msg (dnc, reqmsg);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static int on_udp_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;
|
||||
|
||||
MIO_DEBUG1 (mio, "sent dns message %d\n", (int)mio_ntoh16(mio_dns_msg_to_pkt(msg)->id));
|
||||
|
||||
MIO_ASSERT (mio, dev == (mio_dev_sck_t*)msgxtn->dev);
|
||||
|
||||
if (wrlen <= -1)
|
||||
{
|
||||
/* write has timed out or an error has occurred */
|
||||
if (MIO_LIKELY(msgxtn->on_reply))
|
||||
msgxtn->on_reply (dnc, msg, mio_geterrnum(mio), MIO_NULL, 0);
|
||||
release_dns_msg (dnc, msg);
|
||||
}
|
||||
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_udp_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_DEBUG0 (mio, "unable to schedule timeout...\n");
|
||||
}
|
||||
else
|
||||
{
|
||||
if (msgxtn->rtries == 0)
|
||||
{
|
||||
/* this is the first wait */
|
||||
|
||||
/* TODO: improve performance. hashing by id? */
|
||||
/* chain it to the peing request list */
|
||||
chain_pending_dns_reqmsg (dnc, msg);
|
||||
}
|
||||
|
||||
msgxtn->rtries++;
|
||||
}
|
||||
}
|
||||
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);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void on_udp_connect (mio_dev_sck_t* dev)
|
||||
{
|
||||
}
|
||||
|
||||
static void on_udp_disconnect (mio_dev_sck_t* dev)
|
||||
{
|
||||
}
|
||||
|
||||
mio_svc_dnc_t* mio_svc_dnc_start (mio_t* mio, const mio_skad_t* serv_addr, const mio_skad_t* bind_addr, const mio_ntime_t* send_tmout, const mio_ntime_t* reply_tmout, mio_oow_t reply_tmout_max_tries)
|
||||
{
|
||||
mio_svc_dnc_t* dnc = MIO_NULL;
|
||||
mio_dev_sck_make_t mkinfo;
|
||||
dnc_sck_xtn_t* xtn;
|
||||
|
||||
dnc = (mio_svc_dnc_t*)mio_callocmem(mio, MIO_SIZEOF(*dnc));
|
||||
if (!dnc) goto oops;
|
||||
|
||||
dnc->mio = mio;
|
||||
dnc->stop = mio_svc_dnc_stop;
|
||||
dnc->serv_addr = *serv_addr;
|
||||
dnc->send_tmout = *send_tmout;
|
||||
dnc->reply_tmout = *reply_tmout;
|
||||
dnc->reply_tmout_max_tries = reply_tmout_max_tries;
|
||||
|
||||
MIO_MEMSET (&mkinfo, 0, MIO_SIZEOF(mkinfo));
|
||||
switch (mio_skad_family(serv_addr))
|
||||
{
|
||||
case MIO_AF_INET:
|
||||
mkinfo.type = MIO_DEV_SCK_UDP4;
|
||||
break;
|
||||
|
||||
case MIO_AF_INET6:
|
||||
mkinfo.type = MIO_DEV_SCK_UDP6;
|
||||
break;
|
||||
|
||||
default:
|
||||
mio_seterrnum (mio, MIO_EINVAL);
|
||||
goto oops;
|
||||
}
|
||||
mkinfo.on_write = on_udp_write;
|
||||
mkinfo.on_read = on_udp_read;
|
||||
mkinfo.on_connect = on_udp_connect;
|
||||
mkinfo.on_disconnect = on_udp_disconnect;
|
||||
dnc->udp_sck = mio_dev_sck_make(mio, MIO_SIZEOF(*xtn), &mkinfo);
|
||||
if (!dnc->udp_sck) goto oops;
|
||||
|
||||
xtn = (dnc_sck_xtn_t*)mio_dev_sck_getxtn(dnc->udp_sck);
|
||||
xtn->dnc = dnc;
|
||||
|
||||
if (bind_addr) /* TODO: get mio_dev_sck_bind_t? instead of bind_addr? */
|
||||
{
|
||||
mio_dev_sck_bind_t bi;
|
||||
MIO_MEMSET (&bi, 0, MIO_SIZEOF(bi));
|
||||
bi.localaddr = *bind_addr;
|
||||
if (mio_dev_sck_bind(dnc->udp_sck, &bi) <= -1) goto oops;
|
||||
}
|
||||
|
||||
MIO_SVC_REGISTER (mio, (mio_svc_t*)dnc);
|
||||
return dnc;
|
||||
|
||||
oops:
|
||||
if (dnc)
|
||||
{
|
||||
if (dnc->udp_sck) mio_dev_sck_kill (dnc->udp_sck);
|
||||
mio_freemem (mio, dnc);
|
||||
}
|
||||
return MIO_NULL;
|
||||
}
|
||||
|
||||
void mio_svc_dnc_stop (mio_svc_dnc_t* dnc)
|
||||
{
|
||||
mio_t* mio = dnc->mio;
|
||||
if (dnc->udp_sck) mio_dev_sck_kill (dnc->udp_sck);
|
||||
MIO_SVC_UNREGISTER (mio, dnc);
|
||||
while (dnc->pending_req) release_dns_msg (dnc, dnc->pending_req);
|
||||
mio_freemem (mio, dnc);
|
||||
}
|
||||
|
||||
|
||||
mio_dns_msg_t* mio_svc_dnc_sendmsg (mio_svc_dnc_t* dnc, mio_dns_bhdr_t* bdns, mio_dns_bqr_t* qr, mio_oow_t qr_count, mio_dns_brr_t* rr, mio_oow_t rr_count, mio_dns_bedns_t* edns, mio_svc_dnc_on_reply_t on_reply, mio_oow_t xtnsize)
|
||||
{
|
||||
/* send a request or a response */
|
||||
mio_dns_msg_t* msg;
|
||||
dnc_dns_msg_xtn_t* msgxtn;
|
||||
mio_ntime_t* tmout;
|
||||
|
||||
msg = build_dns_msg(dnc, bdns, qr, qr_count, rr, rr_count, edns, MIO_SIZEOF(*msgxtn) + xtnsize);
|
||||
if (!msg) return MIO_NULL;
|
||||
|
||||
msgxtn = dnc_dns_msg_getxtn(msg);
|
||||
msgxtn->on_reply = on_reply;
|
||||
msgxtn->wtmout = dnc->send_tmout;
|
||||
msgxtn->rtmout = dnc->reply_tmout;
|
||||
msgxtn->rmaxtries = dnc->reply_tmout_max_tries;
|
||||
msgxtn->rtries = 0;
|
||||
msgxtn->servaddr = dnc->serv_addr;
|
||||
|
||||
/* TODO: optionally, override dnc->serv_addr and use the target address passed as a parameter */
|
||||
tmout = MIO_IS_POS_NTIME(&msgxtn->wtmout)? &msgxtn->wtmout: MIO_NULL;
|
||||
if (mio_dev_sck_timedwrite(dnc->udp_sck, mio_dns_msg_to_pkt(msg), msg->pktlen, tmout, msg, &msgxtn->servaddr) <= -1)
|
||||
{
|
||||
release_dns_msg (dnc, msg);
|
||||
return MIO_NULL;
|
||||
}
|
||||
|
||||
return msg;
|
||||
}
|
||||
|
||||
mio_dns_msg_t* mio_svc_dnc_sendreq (mio_svc_dnc_t* dnc, mio_dns_bhdr_t* bdns, mio_dns_bqr_t* qr, mio_dns_bedns_t* edns, mio_svc_dnc_on_reply_t on_reply, mio_oow_t xtnsize)
|
||||
{
|
||||
/* send a request without resource records */
|
||||
if (bdns->rcode != MIO_DNS_RCODE_NOERROR)
|
||||
{
|
||||
mio_seterrnum (dnc->mio, MIO_EINVAL);
|
||||
return MIO_NULL;
|
||||
}
|
||||
|
||||
return mio_svc_dnc_sendmsg(dnc, bdns, qr, 1, MIO_NULL, 0, edns, on_reply, xtnsize);
|
||||
}
|
||||
|
||||
/* ----------------------------------------------------------------------- */
|
||||
|
||||
|
||||
struct dnc_dns_msg_resolve_xtn_t
|
||||
{
|
||||
mio_dns_rrt_t qtype;
|
||||
int flags;
|
||||
mio_svc_dnc_on_resolve_t on_resolve;
|
||||
};
|
||||
typedef struct dnc_dns_msg_resolve_xtn_t dnc_dns_msg_resolve_xtn_t;
|
||||
|
||||
#if defined(MIO_HAVE_INLINE)
|
||||
static MIO_INLINE dnc_dns_msg_resolve_xtn_t* dnc_dns_msg_resolve_getxtn(mio_dns_msg_t* msg) { return ((dnc_dns_msg_resolve_xtn_t*)((mio_uint8_t*)dnc_dns_msg_getxtn(msg) + MIO_SIZEOF(dnc_dns_msg_xtn_t))); }
|
||||
#else
|
||||
# define dnc_dns_msg_resolve_getxtn(msg) ((dnc_dns_msg_resolve_xtn_t*)((mio_uint8_t*)dnc_dns_msg_getxtn(msg) + MIO_SIZEOF(dnc_dns_msg_xtn_t)))
|
||||
#endif
|
||||
|
||||
static void on_dnc_resolve (mio_svc_dnc_t* dnc, mio_dns_msg_t* reqmsg, mio_errnum_t status, const void* data, mio_oow_t dlen)
|
||||
{
|
||||
mio_t* mio = mio_svc_dnc_getmio(dnc);
|
||||
mio_dns_pkt_t* pkt;
|
||||
mio_dns_pkt_info_t* pi = MIO_NULL;
|
||||
dnc_dns_msg_resolve_xtn_t* reqmsgxtn = dnc_dns_msg_resolve_getxtn(reqmsg);
|
||||
|
||||
if (!(reqmsgxtn->flags & MIO_SVC_DNC_RESOLVE_FLAG_BRIEF))
|
||||
{
|
||||
/* the full reply packet is requested. no transformation is required */
|
||||
if (reqmsgxtn->on_resolve) reqmsgxtn->on_resolve(dnc, reqmsg, status, data, dlen);
|
||||
return;
|
||||
}
|
||||
|
||||
if (data)
|
||||
{
|
||||
mio_uint32_t i;
|
||||
|
||||
MIO_ASSERT (mio, status == MIO_ENOERR);
|
||||
|
||||
pi = mio_dns_make_packet_info(mio, data, dlen);
|
||||
if (!pi)
|
||||
{
|
||||
status = mio_geterrnum(mio);
|
||||
goto no_valid_reply;
|
||||
}
|
||||
|
||||
if (pi->hdr.rcode != MIO_DNS_RCODE_NOERROR)
|
||||
{
|
||||
status = MIO_EINVAL;
|
||||
goto no_valid_reply;
|
||||
}
|
||||
|
||||
if (pi->ancount < 0) goto no_valid_reply;
|
||||
|
||||
/* 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++)
|
||||
{
|
||||
/* it is a bit time taking to retreive the query type from the packet
|
||||
* bundled in reqmsg as it requires parsing of the packet. let me use
|
||||
* the query type i stored in the extension space. */
|
||||
switch (reqmsgxtn->qtype)
|
||||
{
|
||||
case MIO_DNS_RRT_Q_ANY:
|
||||
case MIO_DNS_RRT_Q_AFXR: /* AFXR doesn't make sense in the brief mode. just treat it like ANY */
|
||||
/* no A or AAAA found. so give the first entry in the answer */
|
||||
goto match_found;
|
||||
|
||||
case MIO_DNS_RRT_Q_MAILA:
|
||||
/* if you want to get the full RRs, don't use the brief mode. */
|
||||
if (pi->rr.an[i].rrtype == MIO_DNS_RRT_MD || pi->rr.an[i].rrtype == MIO_DNS_RRT_MF) goto match_found;
|
||||
break;
|
||||
|
||||
case MIO_DNS_RRT_Q_MAILB:
|
||||
/* if you want to get the full RRs, don't use the brief mode. */
|
||||
if (pi->rr.an[i].rrtype == MIO_DNS_RRT_MB || pi->rr.an[i].rrtype == MIO_DNS_RRT_MG ||
|
||||
pi->rr.an[i].rrtype == MIO_DNS_RRT_MR || pi->rr.an[i].rrtype == MIO_DNS_RRT_MINFO) goto match_found;
|
||||
break;
|
||||
|
||||
default:
|
||||
if (pi->rr.an[i].rrtype == reqmsgxtn->qtype) goto match_found;
|
||||
break;
|
||||
}
|
||||
}
|
||||
goto no_valid_reply;
|
||||
}
|
||||
else
|
||||
{
|
||||
no_valid_reply:
|
||||
if (reqmsgxtn->on_resolve) reqmsgxtn->on_resolve (dnc, reqmsg, status, MIO_NULL, 0);
|
||||
}
|
||||
|
||||
done:
|
||||
if (pi) mio_dns_free_packet_info(mio_svc_dnc_getmio(dnc), pi);
|
||||
}
|
||||
|
||||
mio_dns_msg_t* mio_svc_dnc_resolve (mio_svc_dnc_t* dnc, const mio_bch_t* qname, mio_dns_rrt_t qtype, int flags, mio_svc_dnc_on_resolve_t on_resolve, mio_oow_t xtnsize)
|
||||
{
|
||||
static mio_dns_bhdr_t qhdr =
|
||||
{
|
||||
-1, /* id */
|
||||
0, /* qr */
|
||||
MIO_DNS_OPCODE_QUERY, /* opcode */
|
||||
0, /* aa */
|
||||
0, /* tc */
|
||||
1, /* rd */
|
||||
0, /* ra */
|
||||
0, /* ad */
|
||||
0, /* cd */
|
||||
MIO_DNS_RCODE_NOERROR /* rcode */
|
||||
};
|
||||
|
||||
static mio_dns_bedns_t qedns =
|
||||
{
|
||||
4096, /* uplen */
|
||||
|
||||
0, /* edns version */
|
||||
0, /* dnssec ok */
|
||||
|
||||
0, /* number of edns options */
|
||||
MIO_NULL
|
||||
};
|
||||
|
||||
mio_dns_bqr_t qr;
|
||||
mio_dns_msg_t* reqmsg;
|
||||
dnc_dns_msg_resolve_xtn_t* reqmsgxtn;
|
||||
|
||||
qr.qname = (mio_bch_t*)qname;
|
||||
qr.qtype = qtype;
|
||||
qr.qclass = MIO_DNS_RRC_IN;
|
||||
|
||||
reqmsg = mio_svc_dnc_sendmsg(dnc, &qhdr, &qr, 1, MIO_NULL, 0, &qedns, on_dnc_resolve, MIO_SIZEOF(*reqmsgxtn) + xtnsize);
|
||||
if (reqmsg)
|
||||
{
|
||||
reqmsgxtn = dnc_dns_msg_resolve_getxtn(reqmsg);
|
||||
reqmsgxtn->on_resolve = on_resolve;
|
||||
reqmsgxtn->qtype = qtype;
|
||||
reqmsgxtn->flags = flags;
|
||||
}
|
||||
|
||||
return reqmsg;
|
||||
}
|
||||
|
||||
|
||||
/* ----------------------------------------------------------------------- */
|
||||
|
||||
static int parse_domain_name (mio_t* mio, mio_dns_pkt_info_t* pi)
|
||||
|
Loading…
Reference in New Issue
Block a user