Commit 7cb3232a authored by Nick Mathewson's avatar Nick Mathewson 🦀
Browse files

Add async dns code from Adam Langley, tweaked to build on OSX. Long-term, we... 

Add  async dns code from Adam Langley, tweaked to build on OSX.  Long-term, we may want to switch to libevnet/c-ares, if they ever handle 10k fd situations properly. This one still needs work too, but at least it is small. This code is disabled by default, and not integrated with dns.c.


svn:r6524
parent 86da3e0a

configure.in

+13 −1
Original line number Diff line number Diff line
@@ -44,6 +44,18 @@ if test $enable_threads = "yes"; then 
  AC_DEFINE(ENABLE_THREADS, 1, [Defined if we will try to use multithreading])

fi



AC_ARG_ENABLE(eventdns,

     AC_HELP_STRING(--enable-eventdns, enable asynchronous dns module),

     [case "${enableval}" in 

        yes) eventdns=true ;;

        no)  eventdns=false ;;

        *) AC_MSG_ERROR(bad value for --enable-eventdns) ;;

      esac], [eventdns=false])

AM_CONDITIONAL(EVENTDNS, test x$eventdns = xtrue)

if test x$eventdns = xtrue; then

   AC_DEFINE([USE_EVENTDNS], 1, "Define to 1 if we'll be using eventdns.c")

fi



case $host in

   *-*-solaris* )

     AC_DEFINE(_REENTRANT, 1, [Define on some platforms to activate x_r() functions in time.h])
@@ -347,7 +359,7 @@ dnl These headers are not essential 


AC_CHECK_HEADERS(stdint.h sys/types.h inttypes.h sys/param.h sys/wait.h sys/limits.h netinet/in.h arpa/inet.h machine/limits.h syslog.h sys/time.h sys/resource.h stddef.h inttypes.h utime.h sys/utime.h sys/mman.h)



AC_CHECK_FUNCS(gettimeofday ftime socketpair uname inet_aton strptime getrlimit setrlimit strlcat strlcpy strtoull getpwnam getpwuid ftello getaddrinfo localtime_r gmtime_r event_get_version event_get_method event_set_log_callback memmem mmap)

AC_CHECK_FUNCS(gettimeofday ftime socketpair uname inet_aton strptime getrlimit setrlimit strlcat strlcpy strtoull getpwnam getpwuid ftello getaddrinfo localtime_r gmtime_r event_get_version event_get_method event_set_log_callback memmem mmap strtok_r)



if test $enable_threads = "yes"; then

  AC_CHECK_HEADERS(pthread.h)

src/or/Makefile.am

+8 −0
Original line number Diff line number Diff line
@@ -4,12 +4,19 @@ noinst_PROGRAMS = test 


bin_PROGRAMS = tor



if EVENTDNS

EVDNSSRC = eventdns.c

else

EVDNSSRC =

endif



tor_SOURCES = buffers.c circuitbuild.c circuitlist.c \

	circuituse.c command.c config.c \

	connection.c connection_edge.c connection_or.c control.c \

	cpuworker.c directory.c dirserv.c dns.c hibernate.c main.c \

	onion.c policies.c relay.c rendcommon.c rendclient.c rendmid.c \

	rendservice.c rephist.c router.c routerlist.c routerparse.c \

	$(EVDNSSRC) \

	tor_main.c



tor_LDADD = ../common/libor.a ../common/libor-crypto.a -lz -lssl -lcrypto
@@ -20,6 +27,7 @@ test_SOURCES = buffers.c circuitbuild.c circuitlist.c \ 
	cpuworker.c directory.c dirserv.c dns.c hibernate.c main.c \

	onion.c policies.c relay.c rendcommon.c rendclient.c rendmid.c \

	rendservice.c rephist.c router.c routerlist.c routerparse.c \

	$(EVDNSSRC) \

	test.c



test_LDADD = ../common/libor.a ../common/libor-crypto.a -lz -lssl -lcrypto

src/or/eventdns.c

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File added.

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src/or/eventdns.h

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/* This software is Public Domain. To view a copy of the public domain dedication,

 * visit http://creativecommons.org/licenses/publicdomain/ or send a letter to

 * Creative Commons, 559 Nathan Abbott Way, Stanford, California 94305, USA.

 *

 * I ask and expect, but do not require, that all derivative works contain an

 * attribution similar to:

 * 	Parts developed by Adam Langley <agl@imperialviolet.org>

 *

 * You may wish to replace the word "Parts" with something else depending on

 * the amount of original code.

 *

 * (Derivative works does not include programs which link against, run or include

 * the source verbatim in their source distributions)

 */



#ifndef EVENTDNS_H

#define EVENTDNS_H



#define DNS_ERR_NONE 0

#define DNS_ERR_FORMAT 1

#define DNS_ERR_SERVERFAILED 2

#define DNS_ERR_NOTEXIST 3

#define DNS_ERR_NOTIMPL 4

#define DNS_ERR_REFUSED 5

#define DNS_ERR_TRUNCATED 65

#define DNS_ERR_UNKNOWN 66

#define DNS_ERR_TIMEOUT 67



#define DNS_IPv4_A 1



#define DNS_QUERY_NO_SEARCH 1



#define DNS_OPTION_SEARCH 1

#define DNS_OPTION_NAMESERVERS 2

#define DNS_OPTION_MISC 4

#define DNS_OPTIONS_ALL 7



typedef void (*eventdns_callback_type) (int result, char type, int count, int ttl, void *addresses, void *arg);



int eventdns_nameserver_add(unsigned long int address);

int eventdns_nameserver_ip_add(const char *ip_as_string);

int eventdns_resolve(const char *name, int flags, eventdns_callback_type callback, void *ptr);

int eventdns_resolv_conf_parse(int flags, const char *);

void eventdns_search_clear();

void eventdns_search_add(const char *domain);

void eventdns_search_ndots_set();



#define DNS_NO_SEARCH 1



#endif  // !EVENTDNS_H

src/or/eventdns_tor.h

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#include "orconfig.h"

#define DNS_USE_OPENSSL_FOR_ID

typedef unsigned int uint;

typedef unsigned char u_char;