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Add DNS API.
Missing functional tests. I'm not sure how to do tests because I don't want to rely on the fact that users have an internet connection.
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‎LICENSE

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- The SCONS build system, located at tools/scons. Copyrighted by the SCONS
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Foundation. Released under an MIT license.
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- UDNS, an asynchronous DNS client, located at deps/udns. Copyrighted by
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Michael Tokarev <[email protected]>. Released under the GNU Lesser General
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Public License version 2.1.
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Additionally deps/http_parser is based on Zed Shaw's Mongrel. Mongrel is
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copyrighted by Zed Shaw and distributed under GPL2 or a permissive open
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licence. See deps/http_parser/LICENCE for more information.

‎deps/udns/.cvsignore

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udns*.tar.gz
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udns_codes.c
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udns.3.html
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*.lo
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*_s
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libudns.so.*
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dnsget
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ex-rdns
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rblcheck
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Makefile
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config.h
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config.status
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config.log
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build-stamp

‎deps/udns/COPYING.LGPL

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‎deps/udns/Makefile.in

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#! /usr/bin/make -rf
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# $Id: Makefile.in,v 1.11 2007/01/15 21:19:08 mjt Exp $
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# libudns Makefile
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#
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# Copyright (C) 2005 Michael Tokarev <[email protected]>
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# This file is part of UDNS library, an async DNS stub resolver.
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#
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library, in file named COPYING.LGPL; if not,
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# write to the Free Software Foundation, Inc., 59 Temple Place,
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# Suite 330, Boston, MA 02111-1307 USA
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NAME = udns
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VERS = 0.0.9
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SRCS = udns_dn.c udns_dntosp.c udns_parse.c udns_resolver.c udns_init.c \
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udns_misc.c udns_XtoX.c \
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udns_rr_a.c udns_rr_ptr.c udns_rr_mx.c udns_rr_txt.c udns_bl.c \
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udns_rr_srv.c udns_rr_naptr.c udns_codes.c
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USRCS = dnsget.c rblcheck.c ex-rdns.c
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DEB = debian/copyright debian/changelog debian/control debian/rules
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DIST = COPYING.LGPL udns.h udns.3 dnsget.1 rblcheck.1 $(SRCS) $(USRCS) \
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NEWS TODO NOTES Makefile.in configure configure.lib \
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inet_XtoX.c getopt.c
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OBJS = $(SRCS:.c=.o) $(GEN:.c=.o)
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LIB = lib$(NAME).a
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LIBFL = -L. -l$(NAME)
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SOVER = 0
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SOBJS = $(OBJS:.o=.lo)
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SOLIB = lib$(NAME)_s.so
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SOLIBV = lib$(NAME).so.$(SOVER)
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SOLIBFL= -L. -l$(NAME)_s
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LIBS = $(LIB) $(SOLIBV)
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UTILS = $(USRCS:.c=)
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UOBJS = $(USRCS:.c=.o)
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SOUTILS = $(USRCS:.c=_s)
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NAMEPFX = $(NAME)-$(VERS)
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CC = @CC@
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CFLAGS = @CFLAGS@
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CDEFS = @CDEFS@
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PICFLAGS = -fPIC
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AWK = awk
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all: static
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.SUFFIXES: .c .o .lo
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static: $(LIB) $(UTILS)
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staticlib: $(LIB)
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$(LIB): $(OBJS)
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-rm -f $@
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$(AR) rv $@ $(OBJS)
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.c.o:
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$(CC) $(CFLAGS) $(CDEFS) -c $<
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shared: $(SOLIBV) $(SOUTILS)
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sharedlib: $(SOLIBV)
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$(SOLIBV): $(SOBJS)
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$(CC) -shared -Wl,--soname,$(SOLIBV) -o $@ $(SOBJS)
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$(SOLIB): $(SOLIBV)
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rm -f $@
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ln -s $(SOLIBV) $@
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.c.lo:
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$(CC) $(CFLAGS) $(PICFLAGS) $(CDEFS) -o $@ -c $<
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# udns_codes.c is generated from udns.h
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udns_codes.c: udns.h
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@echo Generating $@
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@set -e; exec >$@.tmp; \
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set T type C class R rcode; \
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echo "/* Automatically generated. */"; \
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echo "#include \"udns.h\""; \
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while [ "$$1" ]; do \
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echo; \
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echo "const struct dns_nameval dns_$${2}tab[] = {"; \
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$(AWK) "/^ DNS_$${1}_[A-Z0-9_]+[ ]*=/ \
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{ printf \" {%s,\\\"%s\\\"},\\n\", \$$1, substr(\$$1,7) }" \
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udns.h ; \
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echo " {0,0}};"; \
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echo "const char *dns_$${2}name(enum dns_$${2} code) {"; \
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echo " static char nm[20];"; \
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echo " switch(code) {"; \
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$(AWK) "BEGIN{i=0} \
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/^ DNS_$${1}_[A-Z0-9_]+[ ]*=/ \
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{printf \" case %s: return dns_$${2}tab[%d].name;\\n\",\$$1,i++}\
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" udns.h ; \
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echo " }"; \
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echo " return _dns_format_code(nm,\"$$2\",code);"; \
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echo "}"; \
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shift 2; \
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done
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@mv $@.tmp $@
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udns.3.html: udns.3
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groff -man -Thtml udns.3 > $@.tmp
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mv $@.tmp $@
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dist: $(NAMEPFX).tar.gz
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$(NAMEPFX).tar.gz: $(DIST) $(DEB)
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mkdir $(NAMEPFX) $(NAMEPFX)/debian
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ln $(DIST) $(NAMEPFX)
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ln $(DEB) $(NAMEPFX)/debian
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tar cvfz $@ $(NAMEPFX)
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rm -rf $(NAMEPFX)
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subdist:
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cp -p $(DIST) $(TARGET)/
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clean:
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rm -f $(OBJS)
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rm -f $(SOBJS)
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rm -f $(UOBJS)
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rm -f build-stamp config.log
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distclean: clean
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rm -f $(LIBS) $(SOLIB) udns.3.html
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rm -f $(UTILS) $(SOUTILS)
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rm -f config.status config.h Makefile
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Makefile: configure configure.lib Makefile.in
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./configure
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@echo
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@echo Please rerun make >&2
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@exit 1
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.PHONY: all static staticlib shared sharedlib dist clean distclean subdist \
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depend dep deps
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depend dep deps: $(SRCS) $(USRC)
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@echo Generating deps for:
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@echo \ $(SRCS)
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@echo \ $(USRCS)
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@sed '/^# depend/q' Makefile.in > Makefile.tmp
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@set -e; \
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for f in $(SRCS) $(USRCS); do \
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echo $${f%.c}.o $${f%.c}.lo: $$f \
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`sed -n 's/^#[ ]*include[ ]*"\(.*\)".*/\1/p' $$f`; \
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done >> Makefile.tmp; \
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for f in $(USRCS:.c=.o); do \
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echo "$${f%.?}: $$f \$$(LIB)"; \
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echo " \$$(CC) \$$(CFLAGS) -o \$$@ $$f \$$(LIBFL)"; \
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echo "$${f%.?}_s: $$f \$$(SOLIB)"; \
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echo " \$$(CC) \$$(CFLAGS) -o \$$@ $$f \$$(SOLIBFL)"; \
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done >> Makefile.tmp ; \
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if cmp Makefile.tmp Makefile.in >/dev/null 2>&1 ; then \
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echo Makefile.in unchanged; rm -f Makefile.tmp; \
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else \
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echo Updating Makfile.in; mv -f Makefile.tmp Makefile.in ; \
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fi
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# depend
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udns_dn.o udns_dn.lo: udns_dn.c udns.h
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udns_dntosp.o udns_dntosp.lo: udns_dntosp.c udns.h
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udns_parse.o udns_parse.lo: udns_parse.c udns.h
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udns_resolver.o udns_resolver.lo: udns_resolver.c config.h udns.h
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udns_init.o udns_init.lo: udns_init.c config.h udns.h
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udns_misc.o udns_misc.lo: udns_misc.c udns.h
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udns_XtoX.o udns_XtoX.lo: udns_XtoX.c config.h udns.h inet_XtoX.c
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udns_rr_a.o udns_rr_a.lo: udns_rr_a.c udns.h
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udns_rr_ptr.o udns_rr_ptr.lo: udns_rr_ptr.c udns.h
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udns_rr_mx.o udns_rr_mx.lo: udns_rr_mx.c udns.h
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udns_rr_txt.o udns_rr_txt.lo: udns_rr_txt.c udns.h
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udns_bl.o udns_bl.lo: udns_bl.c udns.h
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udns_rr_srv.o udns_rr_srv.lo: udns_rr_srv.c udns.h
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udns_rr_naptr.o udns_rr_naptr.lo: udns_rr_naptr.c udns.h
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udns_codes.o udns_codes.lo: udns_codes.c udns.h
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dnsget.o dnsget.lo: dnsget.c config.h udns.h getopt.c
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rblcheck.o rblcheck.lo: rblcheck.c udns.h getopt.c
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ex-rdns.o ex-rdns.lo: ex-rdns.c udns.h
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dnsget: dnsget.o $(LIB)
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$(CC) $(CFLAGS) -o $@ dnsget.o $(LIBFL)
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dnsget_s: dnsget.o $(SOLIB)
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$(CC) $(CFLAGS) -o $@ dnsget.o $(SOLIBFL)
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rblcheck: rblcheck.o $(LIB)
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$(CC) $(CFLAGS) -o $@ rblcheck.o $(LIBFL)
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rblcheck_s: rblcheck.o $(SOLIB)
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$(CC) $(CFLAGS) -o $@ rblcheck.o $(SOLIBFL)
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ex-rdns: ex-rdns.o $(LIB)
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$(CC) $(CFLAGS) -o $@ ex-rdns.o $(LIBFL)
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ex-rdns_s: ex-rdns.o $(SOLIB)
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$(CC) $(CFLAGS) -o $@ ex-rdns.o $(SOLIBFL)

‎deps/udns/NEWS

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$Id: NEWS,v 1.11 2007/01/15 21:19:08 mjt Exp $
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User-visible changes in udns library. Recent changes on top.
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0.0.9 (16 Jan 2007)
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- incompat: minor API changes in dns_init() &friends. dns_init()
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now requires extra `struct dns_ctx *' argument. Not bumped
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soversion yet - I only expect one "release" with this change,
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0.1 will have more changes and will increment so version
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- many small bugfixes, here and there
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- more robust FORMERR replies handling - not only such replies are now
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recognized, but udns retries queries without EDNS0 extensions if tried
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with, but server reported FORMERR
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- portability changes, udns now includes getopt() implementation fo
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the systems lacking it (mostly windows), and dns_ntop()&dns_pton(),
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which are either just wrappers for system functions or reimplementations.
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- build is now based on autoconf-like configuration
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- NAPTR (RFC3403) RR decoding support
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- new file NOTES which complements TODO somewhat, and includes some
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important shortcomings
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- many internal cleanups, including some preparations for better error
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recovery, security and robustness (and thus API changes)
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- removed some #defines which are now unused (like DNS_MAXSRCH)
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- changed WIN32 to WINDOWS everywhere in preprocessor tests,
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to be able to build it on win64 as well
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0.0.8 (12 Sep 2005)
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- added SRV records (rfc2782) parsing,
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thanks to Thadeu Lima de Souza Cascardo for implementation.
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- bugfixes:
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o use uninitialized value when no reply, library died with assertion:
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assert((status < 0 && result == 0) || (status >= 0 && result != 0)).
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o on some OSes, struct sockaddr_in has additional fields, so
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memcmp'ing two sockaddresses does not work.
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- rblcheck(.1)
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0.0.7 (20 Apr 2005)
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- dnsget.1 manpage and several enhancements to dnsget.
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- allow nameserver names for -n option of dnsget.
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- API change: all dns_submit*() routines now does not expect
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last `now' argument, since requests aren't sent immediately
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anymore.
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- API change: different application timer callback mechanism.
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Udns now uses single per-context timer instead of per-query.
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- don't assume DNS replies only contain backward DN pointers,
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allow forward pointers too. Change parsing API.
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- debianize
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0.0.6 (08 Apr 2005)
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- use double sorted list for requests (sorted by deadline).
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This should significantly speed up timeout processing for
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large number of requests.
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- changed debugging interface, so it is finally useable
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(still not documented).
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- dnsget routine is now Officially Useable, and sometimes
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even more useable than `host' from BIND distribution
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(and sometimes not - dnsget does not have -C option
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and TCP mode)
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- Debian packaging in debian/ -- udns is now maintained as a
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native Debian package.
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- alot (and I really mean alot) of code cleanups all over.

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