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23 Commits

Author SHA1 Message Date
Star Brilliant
72165bffff Release 2.2.1 2019-10-29 06:07:09 +08:00
Star Brilliant
82317bd63e Remove weird logs, fix #59 2019-10-29 03:23:00 +08:00
Star Brilliant
acf3e3c328 Bump version to 2.2.1 2019-10-27 22:41:14 +08:00
Star Brilliant
b708ff47b9 Release 2.2.0 2019-10-27 22:40:48 +08:00
Star Brilliant
4f4966878f Merge pull request #58 from gdm85/master
Add support for DNS-over-TLS upstream resolvers
2019-10-16 19:18:26 +08:00
gdm85
a09dfbbbc1 Add support for type prefix for upstream addresses
Add support for DNS-over-TLS upstream addresses
Remove tcp_only configuration option
2019-10-16 13:14:03 +02:00
gdm85
cc60be718c Improve error logging/checking 2019-10-16 13:14:03 +02:00
gdm85
2067eb688f Fix Opcode never assigned in jsonDNS.PrepareReply 2019-10-16 13:14:03 +02:00
Star Brilliant
ba9b14045e Merge pull request #57 from NESC1US/patch-1
Update Readme.md
2019-10-03 03:11:34 +08:00
NESC1US
ebcc85c01a Update Readme.md
Typo
2019-10-02 20:13:53 +02:00
Star Brilliant
48618aa6e2 Merge pull request #55 from fuero/feature-rpm-package
RPM package + SELinux policy
2019-09-11 21:05:49 +08:00
Star Brilliant
b78329afbc Merge pull request #54 from fuero/feature-nginx-config
Example nginx config
2019-09-11 20:51:36 +08:00
fuero
b1c41e5818 adds example nginx config 2019-09-11 14:48:17 +02:00
fuero
637d50ad91 initial package 2019-09-11 14:13:08 +02:00
Star Brilliant
ce13a961db Fix build error 2019-09-11 02:08:02 +08:00
Star Brilliant
b74220718f Add an option no_user_agent 2019-09-11 00:23:20 +08:00
Star Brilliant
db522591a1 Add example Apache and Caddy configurations 2019-08-31 21:30:20 +08:00
Star Brilliant
1eda33aec3 Add example Apache and Caddy configurations
Solves issue #51
2019-08-31 21:27:32 +08:00
Star Brilliant
268e203540 Release 2.1.2 2019-08-30 01:27:06 +08:00
Star Brilliant
21264c78cf Merge pull request #52 from takumin/patch-1
fix typo
2019-08-30 01:22:44 +08:00
Takumi Takahashi
ae74f1efe5 fix typo 2019-08-29 18:02:24 +09:00
Star Brilliant
d02c31d3ee Merge pull request #50 from felixonmars/patch-1
Update address for google's resolver
2019-06-27 17:45:23 +08:00
Felix Yan
edc86f32e5 Update address for google's resolver
The new ietf endpoint is the only one in the documentation now:
https://developers.google.com/speed/public-dns/docs/doh/

Their blog post prefers the new address too:
https://security.googleblog.com/2019/06/google-public-dns-over-https-doh.html
2019-06-27 14:57:37 +08:00
25 changed files with 840 additions and 58 deletions

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@@ -4,6 +4,27 @@ This Changelog records major changes between versions.
Not all changes are recorded. Please check git log for details.
## Version 2.2.1
- Fix messy log
## Version 2.2.0
- Breaking change: The configuration format of doh-server is changed
- Add support for type prefix for upstream addresses of doh-server
- Add support for DNS-over-TLS upstream addresses of doh-server
- Remove `tcp_only` configuration option in doh-server
- Add `no_user_agent` configuration option in doh-server
- Add an RPM package script with SELinux policy
- Fix Opcode never assigned in `jsonDNS.PrepareReply`
- Improve error logging / checking
- Updated Readme
## Version 2.1.2
- Update address for google's resolver
- Fix a typo
## Version 2.1.1
- Add a set of Dockerfile contributed by the community

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@@ -59,6 +59,7 @@ uninstall:
deps:
@# I am not sure if it is the correct way to keep the common library updated
$(GOGET_UPDATE) github.com/m13253/dns-over-https/doh-client/config
$(GOGET_UPDATE) github.com/m13253/dns-over-https/json-dns
$(GOGET) ./doh-client ./doh-server

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@@ -44,7 +44,7 @@ To test your configuration, type:
dig www.google.com
If it is OK, you will wee:
If it is OK, you will see:
;; SERVER: 127.0.0.1#53(127.0.0.1)
@@ -79,6 +79,81 @@ you can host DNS-over-HTTPS along with other HTTPS services.
HTTP/2 with at least TLS v1.3 is recommended. OCSP stapling must be enabled,
otherwise DNS recursion may happen.
### Example configuration: Apache
SSLProtocol TLSv1.2
SSLHonorCipherOrder On
SSLCipherSuite ECDH+AESGCM:DH+AESGCM:ECDH+AES256:DH+AES256:ECDH+AES128:DH+AES:ECDH+3DES:DH+3DES:RSA+3DES:!aNULL:!MD5:!DSS:!eNULL:!EXP:!LOW:!MD5
SSLUseStapling on
SSLStaplingCache shmcb:/var/lib/apache2/stapling_cache(512000)
<VirtualHost *:443>
ServerName MY_SERVER_NAME
Protocols h2 http/1.1
ProxyPass /dns-query http://[::1]:8053/dns-query
ProxyPassReverse /dns-query http://[::1]:8053/dns-query
</VirtualHost>
(Credit: [Joan Moreau](https://github.com/m13253/dns-over-https/issues/51#issuecomment-526820884))
### Example configuration: Nginx
server {
listen 443 ssl http2 default_server;
listen [::]:443 ssl http2 default_server;
server_name MY_SERVER_NAME;
server_tokens off;
ssl_protocols TLSv1.2 TLSv1.3; # TLS 1.3 requires nginx >= 1.13.0
ssl_prefer_server_ciphers on;
ssl_dhparam /etc/nginx/dhparam.pem; # openssl dhparam -dsaparam -out /etc/nginx/dhparam.pem 4096
ssl_ciphers EECDH+AESGCM:EDH+AESGCM;
ssl_ecdh_curve secp384r1; # Requires nginx >= 1.1.0
ssl_session_timeout 10m;
ssl_session_cache shared:SSL:10m;
ssl_session_tickets off; # Requires nginx >= 1.5.9
ssl_stapling on; # Requires nginx >= 1.3.7
ssl_stapling_verify on; # Requires nginx => 1.3.7
ssl_early_data off; # 0-RTT, enable if desired - Requires nginx >= 1.15.4
resolver 1.1.1.1 valid=300s; # Replace with your local resolver
resolver_timeout 5s;
# HTTP Security Headers
add_header X-Frame-Options DENY;
add_header X-Content-Type-Options nosniff;
add_header X-XSS-Protection "1; mode=block";
add_header Strict-Transport-Security "max-age=63072000";
ssl_certificate /path/to/your/server/certificates/fullchain.pem;
ssl_certificate_key /path/to/your/server/certificates/privkey.pem;
location /dns-query {
proxy_pass http://localhost:8053/dns-query;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
}
}
(Credit: [Cipherli.st](https://cipherli.st/))
### Example configuration: Caddy
https://MY_SERVER_NAME {
log / syslog "{remote} - {user} [{when}] \"{method} {scheme}://{host}{uri} {proto}\" {status} {size} \"{>Referer}\" \"{>User-Agent}\" {>X-Forwarded-For}"
errors syslog
gzip
proxy /dns-query http://[::1]:18053 {
header_upstream Host {host}
header_upstream X-Real-IP {remote}
header_upstream X-Forwarded-For {>X-Forwarded-For},{remote}
header_upstream X-Forwarded-Proto {scheme}
}
root /var/www
tls {
ciphers ECDHE-ECDSA-WITH-CHACHA20-POLY1305 ECDHE-RSA-WITH-CHACHA20-POLY1305 ECDHE-ECDSA-AES256-GCM-SHA384 ECDHE-RSA-AES256-GCM-SHA384 ECDHE-ECDSA-AES128-GCM-SHA256 ECDHE-RSA-AES128-GCM-SHA256
curves X25519 p384 p521
must_staple
}
}
## DNSSEC
DNS-over-HTTPS is compatible with DNSSEC, and requests DNSSEC signatures by

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@@ -0,0 +1,36 @@
diff -Naur dns-over-https-2.1.2.org/systemd/doh-client.service dns-over-https-2.1.2/systemd/doh-client.service
--- dns-over-https-2.1.2.org/systemd/doh-client.service 2019-09-10 12:08:35.177574074 +0200
+++ dns-over-https-2.1.2/systemd/doh-client.service 2019-09-10 12:10:05.473700374 +0200
@@ -7,12 +7,12 @@
[Service]
AmbientCapabilities=CAP_NET_BIND_SERVICE
-ExecStart=/usr/local/bin/doh-client -conf /etc/dns-over-https/doh-client.conf
+ExecStart=/usr/bin/doh-client -conf /etc/dns-over-https/doh-client.conf
LimitNOFILE=1048576
Restart=always
RestartSec=3
Type=simple
-User=nobody
+User=doh-client
[Install]
WantedBy=multi-user.target
diff -Naur dns-over-https-2.1.2.org/systemd/doh-server.service dns-over-https-2.1.2/systemd/doh-server.service
--- dns-over-https-2.1.2.org/systemd/doh-server.service 2019-09-10 12:08:35.177574074 +0200
+++ dns-over-https-2.1.2/systemd/doh-server.service 2019-09-10 12:10:20.980273992 +0200
@@ -5,12 +5,12 @@
[Service]
AmbientCapabilities=CAP_NET_BIND_SERVICE
-ExecStart=/usr/local/bin/doh-server -conf /etc/dns-over-https/doh-server.conf
+ExecStart=/usr/bin/doh-server -conf /etc/dns-over-https/doh-server.conf
LimitNOFILE=1048576
Restart=always
RestartSec=3
Type=simple
-User=nobody
+User=doh-server
[Install]
WantedBy=multi-user.target

240
contrib/rpm/doh.spec Normal file
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@@ -0,0 +1,240 @@
# vim: tabstop=4 shiftwidth=4 expandtab
%global _hardened_build 1
# Debug package is empty anyway
%define debug_package %{nil}
%global _release 1
%global provider github
%global provider_tld com
%global project m13253
%global repo dns-over-https
%global provider_prefix %{provider}.%{provider_tld}/%{project}/%{repo}
%global import_path %{provider_prefix}
#define commit 984df34ca7b45897ecb5871791e398cc160a4b93
%if 0%{?commit:1}
%define shortcommit %(c=%{commit}; echo ${c:0:7})
%define _date %(date +'%%Y%%m%%dT%%H%%M%%S')
%endif
%define rand_id %(head -c20 /dev/urandom|od -An -tx1|tr -d '[[:space:]]')
%if ! 0%{?gobuild:1}
%define gobuild(o:) go build -ldflags "${LDFLAGS:-} -B 0x%{rand_id}" -a -v -x %{?**};
%endif
%if ! 0%{?gotest:1}
%define gotest() go test -ldflags "${LDFLAGS:-}" %{?**}
%endif
Name: %{repo}
Version: 2.1.2
%if 0%{?commit:1}
Release: %{_release}.git%{shortcommit}.%{_date}%{?dist}
Source0: https://%{import_path}/archive/%{commit}.tar.gz
%else
Release: %{_release}%{?dist}
Source0: https://%{import_path}/archive/v%{version}.tar.gz
%endif
Patch0: %{name}-%{version}-systemd.patch
Summary: High performance DNS over HTTPS client & server
License: MIT
URL: https://github.com/m13253/dns-over-https
# e.g. el6 has ppc64 arch without gcc-go, so EA tag is required
# If go_compiler is not set to 1, there is no virtual provide. Use golang instead.
#BuildRequires: %{?go_compiler:compiler(go-compiler)}%{!?go_compiler:golang} >= 1.10
BuildRequires: golang >= 1.10
BuildRequires: systemd
BuildRequires: upx
%description
%{summary}
%package common
BuildArch: noarch
Summary: %{summary} - common files
%description common
%{summary}
%package server
ExclusiveArch: %{?go_arches:%{go_arches}}%{!?go_arches:%{ix86} x86_64 %{arm}}
Summary: %{summary} - Server
Requires(pre): shadow-utils
Requires(post): systemd
Requires(preun): systemd
Requires(postun): systemd
%description server
%{summary}
%package client
ExclusiveArch: %{?go_arches:%{go_arches}}%{!?go_arches:%{ix86} x86_64 %{arm}}
Summary: %{summary} - Client
Requires(pre): shadow-utils
Requires(post): systemd
Requires(preun): systemd
Requires(postun): systemd
%description client
%{summary}
%package selinux
BuildArch: noarch
Source3: doh_server.fc
Source4: doh_server.if
Source5: doh_server.te
Source6: doh_client.fc
Source7: doh_client.if
Source8: doh_client.te
BuildRequires: selinux-policy
BuildRequires: selinux-policy-devel
Requires: %{name}
Requires(post): policycoreutils
Requires(post): policycoreutils-python
Requires(postun): policycoreutils
Summary: SELinux policy for %{name}
%description selinux
%summary
%prep
%if 0%{?commit:1}
%autosetup -n %{name}-%{commit} -p1
%else
%autosetup -n %{name}-%{version} -p1
%endif
mkdir -p selinux
cp %{SOURCE3} %{SOURCE4} %{SOURCE5} %{SOURCE6} %{SOURCE7} %{SOURCE8} selinux
%build
cd selinux
make -f /usr/share/selinux/devel/Makefile doh_server.pp doh_client.pp || exit
cd -
%set_build_flags
%make_build \
PREFIX=%{_prefix} \
GOBUILD="go build -ldflags \"-s -w -B 0x%{rand_id}\" -a -v -x"
%install
%make_install \
PREFIX=%{_prefix}
install -Dpm 0600 selinux/doh_server.pp %{buildroot}%{_datadir}/selinux/packages/doh_server.pp
install -Dpm 0644 selinux/doh_server.if %{buildroot}%{_datadir}/selinux/devel/include/contrib/doh_server.if
install -Dpm 0600 selinux/doh_client.pp %{buildroot}%{_datadir}/selinux/packages/doh_client.pp
install -Dpm 0644 selinux/doh_client.if %{buildroot}%{_datadir}/selinux/devel/include/contrib/doh_client.if
mkdir -p %{buildroot}%{_docdir}/%{name}
mv %{buildroot}%{_sysconfdir}/%{name}/*.example %{buildroot}%{_docdir}/%{name}
mkdir -p %{buildroot}%{_libdir}
mv %{buildroot}%{_sysconfdir}/NetworkManager %{buildroot}%{_libdir}/
for i in $(find %{_buildroot}%{_bindir} -type f)
do
upx $i
done
%files common
%license LICENSE
%doc Changelog.md Readme.md
%files server
%{_libdir}/NetworkManager/dispatcher.d/doh-server
%{_docdir}/%{name}/doh-server.conf.example
%config(noreplace) %{_sysconfdir}/%{name}/doh-server.conf
%{_bindir}/doh-server
%{_unitdir}/doh-server.service
%files client
%{_libdir}/NetworkManager/dispatcher.d/doh-client
%{_docdir}/%{name}/doh-client.conf.example
%config(noreplace) %{_sysconfdir}/%{name}/doh-client.conf
%{_bindir}/doh-client
%{_unitdir}/doh-client.service
%pre server
test -d %{_sharedstatedir}/home || mkdir -p %{_sharedstatedir}/home
getent group doh-server > /dev/null || groupadd -r doh-server
getent passwd doh-server > /dev/null || \
useradd -r -d %{_sharedstatedir}/home/doh-server -g doh-server \
-s /sbin/nologin -c "%{name} - server" doh-server
exit 0
%pre client
test -d %{_sharedstatedir}/home || mkdir -p %{_sharedstatedir}/home
getent group doh-client > /dev/null || groupadd -r doh-client
getent passwd doh-client > /dev/null || \
useradd -r -d %{_sharedstatedir}/home/doh-client -g doh-client \
-s /sbin/nologin -c "%{name} - client" doh-client
exit 0
%post server
%systemd_post doh-server.service
%preun server
%systemd_preun doh-server.service
%postun server
%systemd_postun_with_restart doh-server.service
%post client
%systemd_post doh-client.service
%preun client
%systemd_preun doh-client.service
%postun client
%systemd_postun_with_restart doh-client.service
%files selinux
%{_datadir}/selinux/packages/doh_server.pp
%{_datadir}/selinux/devel/include/contrib/doh_server.if
%{_datadir}/selinux/packages/doh_client.pp
%{_datadir}/selinux/devel/include/contrib/doh_client.if
%post selinux
semodule -n -i %{_datadir}/selinux/packages/doh_server.pp
semodule -n -i %{_datadir}/selinux/packages/doh_client.pp
if /usr/sbin/selinuxenabled ; then
/usr/sbin/load_policy
/usr/sbin/fixfiles -R %{name}-server restore
/usr/sbin/fixfiles -R %{name}-client restore
fi;
semanage -i - << __eof
port -a -t doh_server_port_t -p tcp "8053"
port -a -t doh_client_port_t -p udp "5380"
__eof
exit 0
%postun selinux
if [ $1 -eq 0 ]; then
semanage -i - << __eof
port -d -t doh_server_port_t -p tcp "8053"
port -d -t doh_client_port_t -p udp "5380"
__eof
semodule -n -r doh_server
semodule -n -r doh_client
if /usr/sbin/selinuxenabled ; then
/usr/sbin/load_policy
/usr/sbin/fixfiles -R %{name}-server restore
/usr/sbin/fixfiles -R %{name}-client restore
fi;
fi;
exit 0
%changelog
* Tue Sep 10 2019 fuero <fuerob@gmail.com> 2.1.2-1
- initial package

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@@ -0,0 +1,2 @@
/usr/bin/doh-client -- gen_context(system_u:object_r:doh_client_exec_t,s0)
/usr/lib/systemd/system/doh-client.service -- gen_context(system_u:object_r:doh_client_unit_file_t,s0)

103
contrib/rpm/doh_client.if Normal file
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@@ -0,0 +1,103 @@
## <summary>policy for doh_client</summary>
########################################
## <summary>
## Execute doh_client_exec_t in the doh_client domain.
## </summary>
## <param name="domain">
## <summary>
## Domain allowed to transition.
## </summary>
## </param>
#
interface(`doh_client_domtrans',`
gen_require(`
type doh_client_t, doh_client_exec_t;
')
corecmd_search_bin($1)
domtrans_pattern($1, doh_client_exec_t, doh_client_t)
')
######################################
## <summary>
## Execute doh_client in the caller domain.
## </summary>
## <param name="domain">
## <summary>
## Domain allowed access.
## </summary>
## </param>
#
interface(`doh_client_exec',`
gen_require(`
type doh_client_exec_t;
')
corecmd_search_bin($1)
can_exec($1, doh_client_exec_t)
')
########################################
## <summary>
## Execute doh_client server in the doh_client domain.
## </summary>
## <param name="domain">
## <summary>
## Domain allowed to transition.
## </summary>
## </param>
#
interface(`doh_client_systemctl',`
gen_require(`
type doh_client_t;
type doh_client_unit_file_t;
')
systemd_exec_systemctl($1)
systemd_read_fifo_file_passwd_run($1)
allow $1 doh_client_unit_file_t:file read_file_perms;
allow $1 doh_client_unit_file_t:service manage_service_perms;
ps_process_pattern($1, doh_client_t)
')
########################################
## <summary>
## All of the rules required to administrate
## an doh_client environment
## </summary>
## <param name="domain">
## <summary>
## Domain allowed access.
## </summary>
## </param>
## <param name="role">
## <summary>
## Role allowed access.
## </summary>
## </param>
## <rolecap/>
#
interface(`doh_client_admin',`
gen_require(`
type doh_client_t;
type doh_client_unit_file_t;
')
allow $1 doh_client_t:process { signal_perms };
ps_process_pattern($1, doh_client_t)
tunable_policy(`deny_ptrace',`',`
allow $1 doh_client_t:process ptrace;
')
doh_client_systemctl($1)
admin_pattern($1, doh_client_unit_file_t)
allow $1 doh_client_unit_file_t:service all_service_perms;
optional_policy(`
systemd_passwd_agent_exec($1)
systemd_read_fifo_file_passwd_run($1)
')
')

49
contrib/rpm/doh_client.te Normal file
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@@ -0,0 +1,49 @@
policy_module(doh_client, 1.0.0)
########################################
#
# Declarations
#
type doh_client_t;
type doh_client_exec_t;
init_daemon_domain(doh_client_t, doh_client_exec_t)
type doh_client_port_t;
corenet_port(doh_client_port_t)
type doh_client_unit_file_t;
systemd_unit_file(doh_client_unit_file_t)
########################################
#
# doh_client local policy
#
allow doh_client_t self:fifo_file rw_fifo_file_perms;
allow doh_client_t self:unix_stream_socket create_stream_socket_perms;
allow doh_client_t self:capability net_bind_service;
allow doh_client_t self:process execmem;
allow doh_client_t self:tcp_socket { accept bind connect create getattr getopt listen read setopt write };
allow doh_client_t self:udp_socket { bind connect create getattr read setopt write };
allow doh_client_t doh_client_exec_t:file execmod;
allow doh_client_t doh_client_port_t:tcp_socket name_bind;
corenet_tcp_bind_dns_port(doh_client_t)
corenet_tcp_bind_generic_node(doh_client_t)
corenet_tcp_connect_http_port(doh_client_t)
corenet_udp_bind_dns_port(doh_client_t)
corenet_udp_bind_generic_node(doh_client_t)
corenet_udp_bind_generic_port(doh_client_t)
kernel_read_net_sysctls(doh_client_t)
kernel_search_network_sysctl(doh_client_t)
miscfiles_read_certs(doh_client_t)
sysnet_read_config(doh_client_t)
domain_use_interactive_fds(doh_client_t)
files_read_etc_files(doh_client_t)
miscfiles_read_localization(doh_client_t)

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@@ -0,0 +1,2 @@
/usr/bin/doh-server -- gen_context(system_u:object_r:doh_server_exec_t,s0)
/usr/lib/systemd/system/doh-server.service -- gen_context(system_u:object_r:doh_server_unit_file_t,s0)

122
contrib/rpm/doh_server.if Normal file
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@@ -0,0 +1,122 @@
## <summary>policy for doh_server</summary>
########################################
## <summary>
## Execute doh_server_exec_t in the doh_server domain.
## </summary>
## <param name="domain">
## <summary>
## Domain allowed to transition.
## </summary>
## </param>
#
interface(`doh_server_domtrans',`
gen_require(`
type doh_server_t, doh_server_exec_t;
')
corecmd_search_bin($1)
domtrans_pattern($1, doh_server_exec_t, doh_server_t)
')
######################################
## <summary>
## Execute doh_server in the caller domain.
## </summary>
## <param name="domain">
## <summary>
## Domain allowed access.
## </summary>
## </param>
#
interface(`doh_server_exec',`
gen_require(`
type doh_server_exec_t;
')
corecmd_search_bin($1)
can_exec($1, doh_server_exec_t)
')
########################################
## <summary>
## Execute doh_server server in the doh_server domain.
## </summary>
## <param name="domain">
## <summary>
## Domain allowed to transition.
## </summary>
## </param>
#
interface(`doh_server_systemctl',`
gen_require(`
type doh_server_t;
type doh_server_unit_file_t;
')
systemd_exec_systemctl($1)
systemd_read_fifo_file_passwd_run($1)
allow $1 doh_server_unit_file_t:file read_file_perms;
allow $1 doh_server_unit_file_t:service manage_service_perms;
ps_process_pattern($1, doh_server_t)
')
########################################
## <summary>
## All of the rules required to administrate
## an doh_server environment
## </summary>
## <param name="domain">
## <summary>
## Domain allowed access.
## </summary>
## </param>
## <param name="role">
## <summary>
## Role allowed access.
## </summary>
## </param>
## <rolecap/>
#
interface(`doh_server_admin',`
gen_require(`
type doh_server_t;
type doh_server_unit_file_t;
')
allow $1 doh_server_t:process { signal_perms };
ps_process_pattern($1, doh_server_t)
tunable_policy(`deny_ptrace',`',`
allow $1 doh_server_t:process ptrace;
')
doh_server_systemctl($1)
admin_pattern($1, doh_server_unit_file_t)
allow $1 doh_server_unit_file_t:service all_service_perms;
optional_policy(`
systemd_passwd_agent_exec($1)
systemd_read_fifo_file_passwd_run($1)
')
')
########################################
## <summary>
## Make a TCP connection to the vault_ocsp_responder port.
## </summary>
## <param name="domain">
## <summary>
## Domain allowed access.
## </summary>
## </param>
#
interface(`doh_server_connect',`
gen_require(`
type doh_server_port_t;
type $1;
')
allow $1 doh_server_port_t:tcp_socket name_connect;
')

42
contrib/rpm/doh_server.te Normal file
View File

@@ -0,0 +1,42 @@
policy_module(doh_server, 1.0.0)
require {
class process execmem;
class tcp_socket { accept bind create read write getattr listen setopt connect getopt };
class udp_socket { connect create getattr setopt read write };
class file execmod;
}
type doh_server_t;
type doh_server_exec_t;
init_daemon_domain(doh_server_t, doh_server_exec_t)
type doh_server_port_t;
corenet_port(doh_server_port_t)
type doh_server_unit_file_t;
systemd_unit_file(doh_server_unit_file_t)
allow doh_server_t self:fifo_file rw_fifo_file_perms;
allow doh_server_t self:unix_stream_socket create_stream_socket_perms;
allow doh_server_t self:process execmem;
allow doh_server_t self:tcp_socket { accept read write bind create getattr listen setopt connect getopt};
allow doh_server_t self:udp_socket { connect create getattr setopt read write };
allow doh_server_t doh_server_exec_t:file execmod;
allow doh_server_t doh_server_port_t:tcp_socket name_bind;
domain_use_interactive_fds(doh_server_t)
files_read_etc_files(doh_server_t)
corenet_tcp_bind_generic_node(doh_server_t)
corenet_tcp_connect_dns_port(doh_server_t)
doh_server_connect(httpd_t)
kernel_read_net_sysctls(doh_server_t)
kernel_search_network_sysctl(doh_server_t)
miscfiles_read_localization(doh_server_t)

View File

@@ -53,6 +53,7 @@ type others struct {
NoCookies bool `toml:"no_cookies"`
NoECS bool `toml:"no_ecs"`
NoIPv6 bool `toml:"no_ipv6"`
NoUserAgent bool `toml:"no_user_agent"`
Verbose bool `toml:"verbose"`
DebugHTTPHeaders []string `toml:"debug_http_headers"`
}

View File

@@ -18,9 +18,9 @@ upstream_selector = "random"
# weight should in (0, 100], if upstream_selector is random, weight will be ignored
## Google's productive resolver, good ECS, bad DNSSEC
#[[upstream.upstream_google]]
# url = "https://dns.google.com/resolve"
## Google's resolver, good ECS, good DNSSEC
#[[upstream.upstream_ietf]]
# url = "https://dns.google/dns-query"
# weight = 50
## CloudFlare's resolver, bad ECS, good DNSSEC
@@ -48,11 +48,6 @@ upstream_selector = "random"
# url = "https://9.9.9.9/dns-query"
# weight = 50
## Google's experimental resolver, good ECS, good DNSSEC
#[[upstream.upstream_ietf]]
# url = "https://dns.google.com/experimental"
# weight = 50
## CloudFlare's resolver for Tor, available only with Tor
## Remember to disable ECS below when using Tor!
## Blog: https://blog.cloudflare.com/welcome-hidden-resolver/
@@ -124,5 +119,16 @@ no_ecs = false
# Note that DNS listening and bootstrapping is not controlled by this option.
no_ipv6 = false
# Disable submitting User-Agent
#
# It is generally not recommended to disable submitting User-Agent because it
# is still possible to probe client version according to behavior differences,
# such as TLS handshaking, handling of malformed packets, and specific bugs.
# Additionally, User-Agent is an important way for the server to distinguish
# buggy, old, or insecure clients, and to workaround specific bugs.
# (e.g. doh-server can detect and workaround certain issues of DNSCrypt-Proxy
# and older Firefox.)
no_user_agent = false
# Enable logging
verbose = false

View File

@@ -86,7 +86,11 @@ func (c *Client) generateRequestGoogle(ctx context.Context, w dns.ResponseWriter
}
req.Header.Set("Accept", "application/json, application/dns-message, application/dns-udpwireformat")
req.Header.Set("User-Agent", USER_AGENT)
if !c.conf.Other.NoUserAgent {
req.Header.Set("User-Agent", USER_AGENT)
} else {
req.Header.Set("User-Agent", "")
}
req = req.WithContext(ctx)
c.httpClientMux.RLock()

View File

@@ -36,7 +36,7 @@ import (
"time"
"github.com/m13253/dns-over-https/doh-client/selector"
"github.com/m13253/dns-over-https/json-dns"
jsonDNS "github.com/m13253/dns-over-https/json-dns"
"github.com/miekg/dns"
)
@@ -128,7 +128,11 @@ func (c *Client) generateRequestIETF(ctx context.Context, w dns.ResponseWriter,
req.Header.Set("Content-Type", "application/dns-message")
}
req.Header.Set("Accept", "application/dns-message, application/dns-udpwireformat, application/json")
req.Header.Set("User-Agent", USER_AGENT)
if !c.conf.Other.NoUserAgent {
req.Header.Set("User-Agent", USER_AGENT)
} else {
req.Header.Set("User-Agent", "")
}
req = req.WithContext(ctx)
c.httpClientMux.RLock()
resp, err := c.httpClient.Do(req)
@@ -176,7 +180,7 @@ func (c *Client) parseResponseIETF(ctx context.Context, w dns.ResponseWriter, r
body, err := ioutil.ReadAll(req.response.Body)
if err != nil {
log.Println(err)
log.Printf("read error from upstream %s: %v\n", req.currentUpstream, err)
req.reply.Rcode = dns.RcodeServerFailure
w.WriteMsg(req.reply)
return
@@ -187,7 +191,7 @@ func (c *Client) parseResponseIETF(ctx context.Context, w dns.ResponseWriter, r
if nowDate, err := time.Parse(http.TimeFormat, headerNow); err == nil {
now = nowDate
} else {
log.Println(err)
log.Printf("Date header parse error from upstream %s: %v\n", req.currentUpstream, err)
}
}
headerLastModified := req.response.Header.Get("Last-Modified")
@@ -196,7 +200,7 @@ func (c *Client) parseResponseIETF(ctx context.Context, w dns.ResponseWriter, r
if lastModifiedDate, err := time.Parse(http.TimeFormat, headerLastModified); err == nil {
lastModified = lastModifiedDate
} else {
log.Println(err)
log.Printf("Last-Modified header parse error from upstream %s: %v\n", req.currentUpstream, err)
}
}
timeDelta := now.Sub(lastModified)
@@ -207,7 +211,7 @@ func (c *Client) parseResponseIETF(ctx context.Context, w dns.ResponseWriter, r
fullReply := new(dns.Msg)
err = fullReply.Unpack(body)
if err != nil {
log.Println(err)
log.Printf("unpacking error from upstream %s: %v\n", req.currentUpstream, err)
req.reply.Rcode = dns.RcodeServerFailure
w.WriteMsg(req.reply)
return
@@ -229,7 +233,7 @@ func (c *Client) parseResponseIETF(ctx context.Context, w dns.ResponseWriter, r
buf, err := fullReply.Pack()
if err != nil {
log.Println(err)
log.Printf("packing error with upstream %s: %v\n", req.currentUpstream, err)
req.reply.Rcode = dns.RcodeServerFailure
w.WriteMsg(req.reply)
return
@@ -238,12 +242,15 @@ func (c *Client) parseResponseIETF(ctx context.Context, w dns.ResponseWriter, r
fullReply.Truncated = true
buf, err = fullReply.Pack()
if err != nil {
log.Println(err)
log.Printf("re-packing error with upstream %s: %v\n", req.currentUpstream, err)
return
}
buf = buf[:req.udpSize]
}
w.Write(buf)
_, err = w.Write(buf)
if err != nil {
log.Printf("failed to write to client: %v\n", err)
}
}
func fixRecordTTL(rr dns.RR, delta time.Duration) dns.RR {

View File

@@ -89,7 +89,7 @@ func main() {
flag.Parse()
if *showVersion {
fmt.Printf("doh-server %s\nHomepage: https://github.com/m13253/dns-over-https\n", VERSION)
fmt.Printf("doh-client %s\nHomepage: https://github.com/m13253/dns-over-https\n", VERSION)
return
}

View File

@@ -24,6 +24,6 @@
package main
const (
VERSION = "2.1.1"
VERSION = "2.2.1"
USER_AGENT = "DNS-over-HTTPS/" + VERSION + " (+https://github.com/m13253/dns-over-https)"
)

View File

@@ -25,6 +25,7 @@ package main
import (
"fmt"
"regexp"
"github.com/BurntSushi/toml"
)
@@ -38,7 +39,6 @@ type config struct {
Upstream []string `toml:"upstream"`
Timeout uint `toml:"timeout"`
Tries uint `toml:"tries"`
TCPOnly bool `toml:"tcp_only"`
Verbose bool `toml:"verbose"`
DebugHTTPHeaders []string `toml:"debug_http_headers"`
LogGuessedIP bool `toml:"log_guessed_client_ip"`
@@ -62,7 +62,7 @@ func loadConfig(path string) (*config, error) {
conf.Path = "/dns-query"
}
if len(conf.Upstream) == 0 {
conf.Upstream = []string{"8.8.8.8:53", "8.8.4.4:53"}
conf.Upstream = []string{"udp:8.8.8.8:53", "udp:8.8.4.4:53"}
}
if conf.Timeout == 0 {
conf.Timeout = 10
@@ -75,9 +75,35 @@ func loadConfig(path string) (*config, error) {
return nil, &configError{"You must specify both -cert and -key to enable TLS"}
}
// validate all upstreams
for _, us := range conf.Upstream {
address, t := addressAndType(us)
if address == "" {
return nil, &configError{"One of the upstreams has not a (udp|tcp|tcp-tls) prefix e.g. udp:1.1.1.1:53"}
}
switch t {
case "tcp", "udp", "tcp-tls":
// OK
default:
return nil, &configError{"Invalid upstream prefix specified, choose one of: udp tcp tcp-tls"}
}
}
return conf, nil
}
var rxUpstreamWithTypePrefix = regexp.MustCompile("^[a-z-]+(:)")
func addressAndType(us string) (string, string) {
p := rxUpstreamWithTypePrefix.FindStringSubmatchIndex(us)
if len(p) != 4 {
return "", ""
}
return us[p[2]+1:], us[:p[2]]
}
type configError struct {
err string
}

View File

@@ -27,11 +27,16 @@ path = "/dns-query"
# Upstream DNS resolver
# If multiple servers are specified, a random one will be chosen each time.
# You can use "udp", "tcp" or "tcp-tls" for the type prefix.
# For "udp", UDP will first be used, and switch to TCP when the server asks to
# or the response is too large.
# For "tcp", only TCP will be used.
# For "tcp-tls", DNS-over-TLS (RFC 7858) will be used to secure the upstream connection.
upstream = [
"1.1.1.1:53",
"1.0.0.1:53",
"8.8.8.8:53",
"8.8.4.4:53",
"udp:1.1.1.1:53",
"udp:1.0.0.1:53",
"udp:8.8.8.8:53",
"udp:8.8.4.4:53",
]
# Upstream timeout
@@ -40,9 +45,6 @@ timeout = 10
# Number of tries if upstream DNS fails
tries = 3
# Only use TCP for DNS query
tcp_only = false
# Enable logging
verbose = false

View File

@@ -36,7 +36,7 @@ import (
"strings"
"time"
"github.com/m13253/dns-over-https/json-dns"
jsonDNS "github.com/m13253/dns-over-https/json-dns"
"github.com/miekg/dns"
)
@@ -160,7 +160,7 @@ func (s *Server) generateResponseIETF(ctx context.Context, w http.ResponseWriter
req.response.Id = req.transactionID
respBytes, err := req.response.Pack()
if err != nil {
log.Println(err)
log.Printf("DNS packet construct failure with upstream %s: %v\n", req.currentUpstream, err)
jsonDNS.FormatError(w, fmt.Sprintf("DNS packet construct failure (%s)", err.Error()), 500)
return
}
@@ -183,9 +183,13 @@ func (s *Server) generateResponseIETF(ctx context.Context, w http.ResponseWriter
}
if respJSON.Status == dns.RcodeServerFailure {
log.Printf("received server failure from upstream %s: %v\n", req.currentUpstream, req.response)
w.WriteHeader(503)
}
w.Write(respBytes)
_, err = w.Write(respBytes)
if err != nil {
log.Printf("failed to write to client: %v\n", err)
}
}
// Workaround a bug causing DNSCrypt-Proxy to expect a response with TransactionID = 0xcafe

View File

@@ -35,15 +35,16 @@ import (
"time"
"github.com/gorilla/handlers"
"github.com/m13253/dns-over-https/json-dns"
jsonDNS "github.com/m13253/dns-over-https/json-dns"
"github.com/miekg/dns"
)
type Server struct {
conf *config
udpClient *dns.Client
tcpClient *dns.Client
servemux *http.ServeMux
conf *config
udpClient *dns.Client
tcpClient *dns.Client
tcpClientTLS *dns.Client
servemux *http.ServeMux
}
type DNSRequest struct {
@@ -69,6 +70,10 @@ func NewServer(conf *config) (*Server, error) {
Net: "tcp",
Timeout: timeout,
},
tcpClientTLS: &dns.Client{
Net: "tcp-tls",
Timeout: timeout,
},
servemux: http.NewServeMux(),
}
if conf.LocalAddr != "" {
@@ -88,6 +93,10 @@ func NewServer(conf *config) (*Server, error) {
Timeout: timeout,
LocalAddr: tcpLocalAddr,
}
s.tcpClientTLS.Dialer = &net.Dialer{
Timeout: timeout,
LocalAddr: tcpLocalAddr,
}
}
s.servemux.HandleFunc(conf.Path, s.handlerFunc)
return s, nil
@@ -279,23 +288,35 @@ func (s *Server) doDNSQuery(ctx context.Context, req *DNSRequest) (resp *DNSRequ
for i := uint(0); i < s.conf.Tries; i++ {
req.currentUpstream = s.conf.Upstream[rand.Intn(numServers)]
// Use TCP if always configured to or if the Query type dictates it (AXFR)
if s.conf.TCPOnly || (s.indexQuestionType(req.request, dns.TypeAXFR) > -1) {
req.response, _, err = s.tcpClient.Exchange(req.request, req.currentUpstream)
} else {
req.response, _, err = s.udpClient.Exchange(req.request, req.currentUpstream)
if err == nil && req.response != nil && req.response.Truncated {
log.Println(err)
req.response, _, err = s.tcpClient.Exchange(req.request, req.currentUpstream)
}
upstream, t := addressAndType(req.currentUpstream)
// Retry with TCP if this was an IXFR request and we only received an SOA
if (s.indexQuestionType(req.request, dns.TypeIXFR) > -1) &&
(len(req.response.Answer) == 1) &&
(req.response.Answer[0].Header().Rrtype == dns.TypeSOA) {
req.response, _, err = s.tcpClient.Exchange(req.request, req.currentUpstream)
switch t {
default:
log.Printf("invalid DNS type %q in upstream %q", t, upstream)
return nil, &configError{"invalid DNS type"}
// Use DNS-over-TLS (DoT) if configured to do so
case "tcp-tls":
req.response, _, err = s.tcpClientTLS.Exchange(req.request, upstream)
case "tcp", "udp":
// Use TCP if always configured to or if the Query type dictates it (AXFR)
if t == "tcp" || (s.indexQuestionType(req.request, dns.TypeAXFR) > -1) {
req.response, _, err = s.tcpClient.Exchange(req.request, upstream)
} else {
req.response, _, err = s.udpClient.Exchange(req.request, upstream)
if err == nil && req.response != nil && req.response.Truncated {
log.Println(err)
req.response, _, err = s.tcpClient.Exchange(req.request, upstream)
}
// Retry with TCP if this was an IXFR request and we only received an SOA
if (s.indexQuestionType(req.request, dns.TypeIXFR) > -1) &&
(len(req.response.Answer) == 1) &&
(req.response.Answer[0].Header().Rrtype == dns.TypeSOA) {
req.response, _, err = s.tcpClient.Exchange(req.request, upstream)
}
}
}
if err == nil {
return req, nil
}

View File

@@ -24,6 +24,6 @@
package main
const (
VERSION = "2.1.1"
VERSION = "2.2.1"
USER_AGENT = "DNS-over-HTTPS/" + VERSION + " (+https://github.com/m13253/dns-over-https)"
)

8
go.mod
View File

@@ -5,8 +5,8 @@ go 1.12
require (
github.com/BurntSushi/toml v0.3.1
github.com/gorilla/handlers v1.4.0
github.com/miekg/dns v1.1.14
golang.org/x/crypto v0.0.0-20190621222207-cc06ce4a13d4 // indirect
golang.org/x/net v0.0.0-20190620200207-3b0461eec859
golang.org/x/sys v0.0.0-20190621203818-d432491b9138 // indirect
github.com/miekg/dns v1.1.22
golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550 // indirect
golang.org/x/net v0.0.0-20191027093000-83d349e8ac1a
golang.org/x/sys v0.0.0-20191026070338-33540a1f6037 // indirect
)

18
go.sum
View File

@@ -4,15 +4,33 @@ github.com/gorilla/handlers v1.4.0 h1:XulKRWSQK5uChr4pEgSE4Tc/OcmnU9GJuSwdog/tZs
github.com/gorilla/handlers v1.4.0/go.mod h1:Qkdc/uu4tH4g6mTK6auzZ766c4CA0Ng8+o/OAirnOIQ=
github.com/miekg/dns v1.1.14 h1:wkQWn9wIp4mZbwW8XV6Km6owkvRPbOiV004ZM2CkGvA=
github.com/miekg/dns v1.1.14/go.mod h1:W1PPwlIAgtquWBMBEV9nkV9Cazfe8ScdGz/Lj7v3Nrg=
github.com/miekg/dns v1.1.22 h1:Jm64b3bO9kP43ddLjL2EY3Io6bmy1qGb9Xxz6TqS6rc=
github.com/miekg/dns v1.1.22/go.mod h1:bPDLeHnStXmXAq1m/Ch/hvfNHr14JKNPMBo3VZKjuso=
golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
golang.org/x/crypto v0.0.0-20190621222207-cc06ce4a13d4 h1:ydJNl0ENAG67pFbB+9tfhiL2pYqLhfoaZFw/cjLhY4A=
golang.org/x/crypto v0.0.0-20190621222207-cc06ce4a13d4/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/crypto v0.0.0-20190923035154-9ee001bba392/go.mod h1:/lpIB1dKB+9EgE3H3cr1v9wB50oz8l4C4h62xy7jSTY=
golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550 h1:ObdrDkeb4kJdCP557AjRjq69pTHfNouLtWZG7j9rPN8=
golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.0.0-20190620200207-3b0461eec859 h1:R/3boaszxrf1GEUWTVDzSKVwLmSJpwZ1yqXm8j0v2QI=
golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20190923162816-aa69164e4478/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20191027093000-83d349e8ac1a h1:Yu34BogBivvmu7SAzHHaB9nZWH5D1C+z3F1jyIaYZSQ=
golang.org/x/net v0.0.0-20191027093000-83d349e8ac1a/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20190621203818-d432491b9138 h1:t8BZD9RDjkm9/h7yYN6kE8oaeov5r9aztkB7zKA5Tkg=
golang.org/x/sys v0.0.0-20190621203818-d432491b9138/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20190922100055-0a153f010e69/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20190924154521-2837fb4f24fe/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20191026070338-33540a1f6037 h1:YyJpGZS1sBuBCzLAR1VEpK193GlqGZbnPFnPV/5Rsb4=
golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
golang.org/x/text v0.3.2 h1:tW2bmiBqwgJj/UpqtC8EpXEZVYOwU0yG4iWbprSVAcs=
golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
golang.org/x/tools v0.0.0-20190907020128-2ca718005c18/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=

View File

@@ -38,7 +38,7 @@ func PrepareReply(req *dns.Msg) *dns.Msg {
reply := new(dns.Msg)
reply.Id = req.Id
reply.Response = true
reply.Opcode = reply.Opcode
reply.Opcode = req.Opcode
reply.RecursionDesired = req.RecursionDesired
reply.RecursionAvailable = req.RecursionDesired
reply.CheckingDisabled = req.CheckingDisabled