Commit Graph

34 Commits

Author SHA1 Message Date
Nick Mathewson
e6785ee16d Get Libevent's PRNG functioning under the linux sandbox
Libevent uses an arc4random implementation (I know, I know) to
generate DNS transaction IDs and capitalization.  But it liked to
initialize it either with opening /dev/urandom (which won't work
under the sandbox if it doesn't use the right pointer), or with
sysctl({CTL_KERN,KERN_RANDOM,RANDOM_UUIC}).  To make _that_ work, we
were permitting sysctl unconditionally.  That's not such a great
idea.

Instead, we try to initialize the libevent PRNG _before_ installing
the sandbox, and make sysctl always fail with EPERM under the
sandbox.
2014-04-16 22:03:09 -04:00
Nick Mathewson
bb37544214 Merge remote-tracking branch 'public/bug10169_024' into bug10169_025_v2
Conflicts:
	src/common/compat_libevent.h
	src/or/relay.c
2014-03-04 11:00:02 -05:00
Nick Mathewson
46118d7d75 Merge remote-tracking branch 'public/bug10169_023' into bug10169_024
Conflicts:
	src/or/relay.c
2014-03-04 10:54:54 -05:00
Nick Mathewson
833d027778 Monotonize the OOM-killer data timers
In a couple of places, to implement the OOM-circuit-killer defense
against sniper attacks, we have counters to remember the age of
cells or data chunks.  These timers were based on wall clock time,
which can move backwards, thus giving roll-over results for our age
calculation.  This commit creates a low-budget monotonic time, based
on ratcheting gettimeofday(), so that even in the event of a time
rollback, we don't do anything _really_ stupid.

A future version of Tor should update this function to do something
even less stupid here, like employ clock_gettime() or its kin.
2014-02-26 09:51:30 -05:00
Nick Mathewson
52d222aafb Add tests for buffer time tracking. 2014-02-12 12:48:11 -05:00
Kevin Butler
6e17fa6d7b Added --library-versions flag to print the compile time and runtime versions of libevent, openssl and zlib. Partially implements #6384. 2013-09-01 17:38:01 +01:00
Nick Mathewson
4da083db3b Update the copyright date to 201. 2013-01-16 01:54:56 -05:00
Nick Mathewson
0cb921f3e9 Convert all include-guard macros to avoid reserved identifiers.
In C, we technically aren't supposed to define our own things that
start with an underscore.

This is a purely machine-generated commit.  First, I ran this script
on all the headers in src/{common,or,test,tools/*}/*.h :
==============================

use strict;

my %macros = ();
my %skipped = ();
FILE: for my $fn (@ARGV) {
    my $f = $fn;
    if ($fn !~ /^\.\//) {
	$f = "./$fn";
    }
    $skipped{$fn} = 0;
    open(F, $fn);
    while (<F>) {
	if (/^#ifndef ([A-Za-z0-9_]+)/) {
	    $macros{$fn} = $1;
	    next FILE;
	}
    }
}

print "#!/usr/bin/perl -w -i -p\n\n";
for my $fn (@ARGV) {
    if (! exists $macros{$fn}) {
	print "# No macro known for $fn!\n" if (!$skipped{$fn});
	next;
    }
    if ($macros{$fn} !~ /_H_?$/) {
	print "# Weird macro for $fn...\n";
    }
    my $goodmacro = uc $fn;
    $goodmacro =~ s#.*/##;
    $goodmacro =~ s#[\/\-\.]#_#g;
    print "s/(?<![A-Za-z0-9_])$macros{$fn}(?![A-Za-z0-9_])/TOR_${goodmacro}/g;\n"
}
==============================

It produced the following output, which I then re-ran on those same files:

==============================

s/(?<![A-Za-z0-9_])_TOR_ADDRESS_H(?![A-Za-z0-9_])/TOR_ADDRESS_H/g;
s/(?<![A-Za-z0-9_])_TOR_AES_H(?![A-Za-z0-9_])/TOR_AES_H/g;
s/(?<![A-Za-z0-9_])_TOR_COMPAT_H(?![A-Za-z0-9_])/TOR_COMPAT_H/g;
s/(?<![A-Za-z0-9_])_TOR_COMPAT_LIBEVENT_H(?![A-Za-z0-9_])/TOR_COMPAT_LIBEVENT_H/g;
s/(?<![A-Za-z0-9_])_TOR_CONTAINER_H(?![A-Za-z0-9_])/TOR_CONTAINER_H/g;
s/(?<![A-Za-z0-9_])_TOR_CRYPTO_H(?![A-Za-z0-9_])/TOR_CRYPTO_H/g;
s/(?<![A-Za-z0-9_])TOR_DI_OPS_H(?![A-Za-z0-9_])/TOR_DI_OPS_H/g;
s/(?<![A-Za-z0-9_])_TOR_MEMAREA_H(?![A-Za-z0-9_])/TOR_MEMAREA_H/g;
s/(?<![A-Za-z0-9_])_TOR_MEMPOOL_H(?![A-Za-z0-9_])/TOR_MEMPOOL_H/g;
s/(?<![A-Za-z0-9_])TOR_PROCMON_H(?![A-Za-z0-9_])/TOR_PROCMON_H/g;
s/(?<![A-Za-z0-9_])_TOR_TORGZIP_H(?![A-Za-z0-9_])/TOR_TORGZIP_H/g;
s/(?<![A-Za-z0-9_])_TOR_TORINT_H(?![A-Za-z0-9_])/TOR_TORINT_H/g;
s/(?<![A-Za-z0-9_])_TOR_LOG_H(?![A-Za-z0-9_])/TOR_TORLOG_H/g;
s/(?<![A-Za-z0-9_])_TOR_TORTLS_H(?![A-Za-z0-9_])/TOR_TORTLS_H/g;
s/(?<![A-Za-z0-9_])_TOR_UTIL_H(?![A-Za-z0-9_])/TOR_UTIL_H/g;
s/(?<![A-Za-z0-9_])_TOR_BUFFERS_H(?![A-Za-z0-9_])/TOR_BUFFERS_H/g;
s/(?<![A-Za-z0-9_])_TOR_CHANNEL_H(?![A-Za-z0-9_])/TOR_CHANNEL_H/g;
s/(?<![A-Za-z0-9_])_TOR_CHANNEL_TLS_H(?![A-Za-z0-9_])/TOR_CHANNELTLS_H/g;
s/(?<![A-Za-z0-9_])_TOR_CIRCUITBUILD_H(?![A-Za-z0-9_])/TOR_CIRCUITBUILD_H/g;
s/(?<![A-Za-z0-9_])_TOR_CIRCUITLIST_H(?![A-Za-z0-9_])/TOR_CIRCUITLIST_H/g;
s/(?<![A-Za-z0-9_])_TOR_CIRCUITMUX_EWMA_H(?![A-Za-z0-9_])/TOR_CIRCUITMUX_EWMA_H/g;
s/(?<![A-Za-z0-9_])_TOR_CIRCUITMUX_H(?![A-Za-z0-9_])/TOR_CIRCUITMUX_H/g;
s/(?<![A-Za-z0-9_])_TOR_CIRCUITUSE_H(?![A-Za-z0-9_])/TOR_CIRCUITUSE_H/g;
s/(?<![A-Za-z0-9_])_TOR_COMMAND_H(?![A-Za-z0-9_])/TOR_COMMAND_H/g;
s/(?<![A-Za-z0-9_])_TOR_CONFIG_H(?![A-Za-z0-9_])/TOR_CONFIG_H/g;
s/(?<![A-Za-z0-9_])TOR_CONFPARSE_H(?![A-Za-z0-9_])/TOR_CONFPARSE_H/g;
s/(?<![A-Za-z0-9_])_TOR_CONNECTION_EDGE_H(?![A-Za-z0-9_])/TOR_CONNECTION_EDGE_H/g;
s/(?<![A-Za-z0-9_])_TOR_CONNECTION_H(?![A-Za-z0-9_])/TOR_CONNECTION_H/g;
s/(?<![A-Za-z0-9_])_TOR_CONNECTION_OR_H(?![A-Za-z0-9_])/TOR_CONNECTION_OR_H/g;
s/(?<![A-Za-z0-9_])_TOR_CONTROL_H(?![A-Za-z0-9_])/TOR_CONTROL_H/g;
s/(?<![A-Za-z0-9_])_TOR_CPUWORKER_H(?![A-Za-z0-9_])/TOR_CPUWORKER_H/g;
s/(?<![A-Za-z0-9_])_TOR_DIRECTORY_H(?![A-Za-z0-9_])/TOR_DIRECTORY_H/g;
s/(?<![A-Za-z0-9_])_TOR_DIRSERV_H(?![A-Za-z0-9_])/TOR_DIRSERV_H/g;
s/(?<![A-Za-z0-9_])_TOR_DIRVOTE_H(?![A-Za-z0-9_])/TOR_DIRVOTE_H/g;
s/(?<![A-Za-z0-9_])_TOR_DNS_H(?![A-Za-z0-9_])/TOR_DNS_H/g;
s/(?<![A-Za-z0-9_])_TOR_DNSSERV_H(?![A-Za-z0-9_])/TOR_DNSSERV_H/g;
s/(?<![A-Za-z0-9_])TOR_EVENTDNS_TOR_H(?![A-Za-z0-9_])/TOR_EVENTDNS_TOR_H/g;
s/(?<![A-Za-z0-9_])_TOR_GEOIP_H(?![A-Za-z0-9_])/TOR_GEOIP_H/g;
s/(?<![A-Za-z0-9_])_TOR_HIBERNATE_H(?![A-Za-z0-9_])/TOR_HIBERNATE_H/g;
s/(?<![A-Za-z0-9_])_TOR_MAIN_H(?![A-Za-z0-9_])/TOR_MAIN_H/g;
s/(?<![A-Za-z0-9_])_TOR_MICRODESC_H(?![A-Za-z0-9_])/TOR_MICRODESC_H/g;
s/(?<![A-Za-z0-9_])_TOR_NETWORKSTATUS_H(?![A-Za-z0-9_])/TOR_NETWORKSTATUS_H/g;
s/(?<![A-Za-z0-9_])_TOR_NODELIST_H(?![A-Za-z0-9_])/TOR_NODELIST_H/g;
s/(?<![A-Za-z0-9_])_TOR_NTMAIN_H(?![A-Za-z0-9_])/TOR_NTMAIN_H/g;
s/(?<![A-Za-z0-9_])_TOR_ONION_H(?![A-Za-z0-9_])/TOR_ONION_H/g;
s/(?<![A-Za-z0-9_])_TOR_OR_H(?![A-Za-z0-9_])/TOR_OR_H/g;
s/(?<![A-Za-z0-9_])_TOR_POLICIES_H(?![A-Za-z0-9_])/TOR_POLICIES_H/g;
s/(?<![A-Za-z0-9_])_TOR_REASONS_H(?![A-Za-z0-9_])/TOR_REASONS_H/g;
s/(?<![A-Za-z0-9_])_TOR_RELAY_H(?![A-Za-z0-9_])/TOR_RELAY_H/g;
s/(?<![A-Za-z0-9_])_TOR_RENDCLIENT_H(?![A-Za-z0-9_])/TOR_RENDCLIENT_H/g;
s/(?<![A-Za-z0-9_])_TOR_RENDCOMMON_H(?![A-Za-z0-9_])/TOR_RENDCOMMON_H/g;
s/(?<![A-Za-z0-9_])_TOR_RENDMID_H(?![A-Za-z0-9_])/TOR_RENDMID_H/g;
s/(?<![A-Za-z0-9_])_TOR_RENDSERVICE_H(?![A-Za-z0-9_])/TOR_RENDSERVICE_H/g;
s/(?<![A-Za-z0-9_])_TOR_REPHIST_H(?![A-Za-z0-9_])/TOR_REPHIST_H/g;
s/(?<![A-Za-z0-9_])_TOR_REPLAYCACHE_H(?![A-Za-z0-9_])/TOR_REPLAYCACHE_H/g;
s/(?<![A-Za-z0-9_])_TOR_ROUTER_H(?![A-Za-z0-9_])/TOR_ROUTER_H/g;
s/(?<![A-Za-z0-9_])_TOR_ROUTERLIST_H(?![A-Za-z0-9_])/TOR_ROUTERLIST_H/g;
s/(?<![A-Za-z0-9_])_TOR_ROUTERPARSE_H(?![A-Za-z0-9_])/TOR_ROUTERPARSE_H/g;
s/(?<![A-Za-z0-9_])TOR_ROUTERSET_H(?![A-Za-z0-9_])/TOR_ROUTERSET_H/g;
s/(?<![A-Za-z0-9_])TOR_STATEFILE_H(?![A-Za-z0-9_])/TOR_STATEFILE_H/g;
s/(?<![A-Za-z0-9_])_TOR_STATUS_H(?![A-Za-z0-9_])/TOR_STATUS_H/g;
s/(?<![A-Za-z0-9_])TOR_TRANSPORTS_H(?![A-Za-z0-9_])/TOR_TRANSPORTS_H/g;
s/(?<![A-Za-z0-9_])_TOR_TEST_H(?![A-Za-z0-9_])/TOR_TEST_H/g;
s/(?<![A-Za-z0-9_])_TOR_FW_HELPER_H(?![A-Za-z0-9_])/TOR_TOR_FW_HELPER_H/g;
s/(?<![A-Za-z0-9_])_TOR_FW_HELPER_NATPMP_H(?![A-Za-z0-9_])/TOR_TOR_FW_HELPER_NATPMP_H/g;
s/(?<![A-Za-z0-9_])_TOR_FW_HELPER_UPNP_H(?![A-Za-z0-9_])/TOR_TOR_FW_HELPER_UPNP_H/g;
==============================
2012-10-12 12:13:10 -04:00
Nick Mathewson
e62104a7d2 Move tor_gettimeofday_cached() into compat_libevent 2012-06-15 15:07:53 -04:00
Nick Mathewson
913067f788 Resolve about 24 DOCDOCs 2012-06-05 00:17:54 -04:00
Nick Mathewson
0fa107a6aa Update copyright dates to 2012; add a few missing copyright statements 2012-06-04 20:58:17 -04:00
Nick Mathewson
173b18c79b Add about 60 more DOCDOC comments to 0.2.3
Also, try to resolve some doxygen issues.  First, define a magic
"This is doxygen!" macro so that we take the correct branch in
various #if/#else/#endifs in order to get the right documentation.
Second, add in a few grouping @{ and @} entries in order to get some
variables and fields to get grouped together.
2012-06-04 19:59:08 -04:00
Nick Mathewson
616b60cef3 Revert "Use callback-driven approach to block renegotiations."
This reverts commit 406ae1ba5a.
2011-12-06 19:49:20 -05:00
Nick Mathewson
df1f72329a Revert "Refactor tor_event_base_once to do what we actually want"
This reverts commit 7920ea55b8.
2011-12-06 19:49:20 -05:00
Nick Mathewson
135a5102a3 Revert "Make pending libevent actions cancelable"
This reverts commit aba25a6939.
2011-12-06 19:49:20 -05:00
Nick Mathewson
aba25a6939 Make pending libevent actions cancelable
This avoids a dangling pointer issue in the 3412 code, and should
fix bug 4599.
2011-11-29 17:08:29 -05:00
Nick Mathewson
7920ea55b8 Refactor tor_event_base_once to do what we actually want
This version avoids the timeout system entirely, gives a nicer
interface, and lets us manage allocation explicitly.
2011-11-25 17:18:54 -05:00
George Kadianakis
406ae1ba5a Use callback-driven approach to block renegotiations.
Also use this new approach in the bufferevents-enabled case.
2011-11-13 14:47:11 +01:00
Nick Mathewson
41dfc4c19c Make bufferevents work with TokenBucketRefillInterval 2011-09-22 15:07:34 -04:00
Nick Mathewson
59d0f750c9 Apply rate-limiting to the lowest bufferevent in the stack.
When we're doing filtering ssl bufferevents, we want the rate-limits
to apply to the lowest level of the bufferevent stack, so that we're
actually limiting bytes sent on the network. Otherwise, we'll read
from the network aggressively, and only limit stuff as we process it.
2011-08-24 17:31:32 -04:00
Nick Mathewson
d3653063d3 Automatically use filtering bufferevents with IOCP. 2011-08-18 15:16:05 -04:00
Nick Mathewson
fa1d47293b Merge remote-tracking branch 'origin/maint-0.2.2'
The conflicts were mainly caused by the routerinfo->node transition.

Conflicts:
	src/or/circuitbuild.c
	src/or/command.c
	src/or/connection_edge.c
	src/or/directory.c
	src/or/dirserv.c
	src/or/relay.c
	src/or/rendservice.c
	src/or/routerlist.c
2011-05-30 15:41:46 -04:00
Nick Mathewson
7f0fb8e608 whitespace fixes 2011-05-30 15:21:06 -04:00
Nick Mathewson
21de9d46e2 Merge remote-tracking branch 'origin/maint-0.2.2'
Conflicts:
	src/common/compat.c
	src/or/main.c
2011-05-30 14:58:26 -04:00
Nick Mathewson
cfeafe5e77 Use a 64-bit type to hold sockets on win64.
On win64, sockets are of type UINT_PTR; on win32 they're u_int;
elsewhere they're int.  The correct windows way to check a socket for
being set is to compare it with INVALID_SOCKET; elsewhere you see if
it is negative.

On Libevent 2, all callbacks take sockets as evutil_socket_t; we've
been passing them int.

This patch should fix compilation and correctness when built for
64-bit windows.  Fixes bug 3270.
2011-05-23 00:17:48 -04:00
Nick Mathewson
c612ddee17 Add a new option to enable/disable IOCP support 2010-09-28 14:01:45 -04:00
Nick Mathewson
ffd5070b04 Convert bufferevents to use rate-limiting.
This requires the latest Git version of Libevent as of 24 March 2010.
In the future, we'll just say it requires Libevent 2.0.5-alpha or
later.

Since Libevent doesn't yet support hierarchical rate limit groups,
there isn't yet support for tracking relayed-bytes separately when
using the bufferevent system.  If a future version does add support
for hierarchical buckets, we can add that back in.
2010-09-27 14:22:18 -04:00
Nick Mathewson
57e7b54b7b Teach read_event/write_event manipulators about bufferevents.
Add an --enable-bufferevents config switch.
2010-09-27 12:28:43 -04:00
Nick Mathewson
ad2d8ac073 Use Libevent 2.0's periodic timers where available.
These timers behave better with non-monotonic clocks than our old
ones, and also try harder to make once-per-second events get called
one second apart, rather than one-plus-epsilon seconds apart.

This fixes bug 943 for everybody using Libevent 2.0 or later.
2010-06-25 15:31:46 -04:00
Sebastian Hahn
408a828b1f Make the DNSPort option work with libevent 2.x
We need to use evdns_add_server_port_with_base() when configuring
our DNS listener, because libevent segfaults otherwise. Add a macro
in compat_libevent.h to pick the correct implementation depending
on the libevent version.

Fixes bug 1143, found by SwissTorExit
2010-02-19 22:36:53 +01:00
Nick Mathewson
74bf885b2d Whitespace and osx fixes on libevent2 patch. 2009-06-12 15:09:09 -04:00
Nick Mathewson
33b1d714e7 Make Tor compile with Libevent 1.0 again. 2009-06-12 14:27:53 -04:00
Nick Mathewson
c0af3cdfb6 Move the Libvent setup logic into compat_libevent from config.
This has been some pretty ugly and voodoo-laden code.  I've tried to
clean it up a bit, but more work probably remains.
2009-06-12 14:27:52 -04:00
Nick Mathewson
e5b88dc83f Update Tor to use Libevent 2.0 APIs when available.
This patch adds a new compat_libevent.[ch] set of files, and moves our
Libevent compatibility and utilitity functions there.  We build them
into a separate .a so that nothing else in src/commmon depends on
Libevent (partially fixing bug 507).

Also, do not use our own built-in evdns copy when we have Libevent
2.0, whose evdns is finally good enough (thus fixing Bug 920).
2009-06-12 14:27:52 -04:00