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Diffstat (limited to 'net-dns/openresolv/files/pdnsd')
-rw-r--r--net-dns/openresolv/files/pdnsd673
1 files changed, 673 insertions, 0 deletions
diff --git a/net-dns/openresolv/files/pdnsd b/net-dns/openresolv/files/pdnsd
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+++ b/net-dns/openresolv/files/pdnsd
@@ -0,0 +1,673 @@
+#!/bin/sh
+# Copyright 1999-2010 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+# /etc/pdnsd/pdnsd.conf updater
+# Written by Oldrich Jedlicka (oldium.pro@seznam.cz)
+
+# Implementation notes:
+# * The assumptions are same as for other scripts like bind and dnsmasq:
+# - We assume that we are a local dns cache - after all, why would a server
+# use resolvconf?
+# - Now that we have assumed this, we also assume that generic DHCP clients
+# will enter their domains and search domains ONLY in the "search" field
+# in their resolv.confs and VPN clients will put the domain they are for
+# into the domain field only.
+# - This allows pdnsd to forward domains for a specific VPN domain to the
+# VPN nameserver and everything else to the standard name servers.
+#
+# HOW-TO CONFIGURE:
+#
+# To get this working, you need to do only two steps
+#
+# 1. Create a basic configuration of /etc/pdnsd/pdnsd.conf, you can use
+# /etc/pdnsd/pdnsd.conf.example to start.
+#
+# Additional configuration will be created automatically be resolvconf.
+# The generated server sections has labels starting with "resolvconf", so
+#
+# DO NOT USE "resolvconf" IN YOUR LABELS!
+#
+# Check if the status_ctl is set to "on", otherwise the configuration
+# will not be automatically reloaded - see sample config file.
+#
+# You are free to edit automatically created server sections, but always
+# write one option per line. There are few options that are always recreated
+# and your changes in them will be lost. Here is the list (with example
+# values):
+#
+# preset=on;
+# ip="192.168.0.1","192.168.0.2";
+# include=".net",".com";'
+#
+# The exclude directive in "resolvconf" server section is partly recreated.
+# Known (configured) domains in the form ".<domain>" or ".<domain>." are
+# added and removed automatically, unknown domains (also those not in
+# the format above) found in this directive are kept.
+#
+# The sample configuration file /etc/pdnsd/pdnsd.conf prepared to work
+# with resolvconf would look like this:
+#
+#global {
+# perm_cache=2048;
+# run_as="pdnsd";
+# status_ctl = on; # Important to enable status control
+# run_ipv4=on;
+# par_queries=2; # How many servers are probed in parallel
+# interface = "lo"; # Interface on which the pdnsd listens
+#}
+#
+# 2. The last step is to configure dns configuration for /etc/resolv.conf.
+#
+# a) For <net-dns/openresolv-2.0, configure the lo interface to use
+# 127.0.0.1. In Gentoo we set it up like so in /etc/conf.d/net
+#
+# dns_servers_lo=( "127.0.0.1" )
+#
+# b) For net-dns/openresolv-2* the configuration has been changed. Add
+# the following line to the top of your /etc/resolvconf/resolv.conf.d/base
+# (possibly create one)
+#
+# nameserver 127.0.0.1
+#
+# c) For net-dns/openresolv-3* the configuration has been changed again.
+# Uncomment the following line in your /etc/resolvconf.conf
+#
+# # If you run a local name server, you should uncomment the below line and
+# # configure your subscribers configuration files below.
+# name_servers=127.0.0.1
+#
+
+# pdnsd config file
+PDNSDCONFIG="/etc/pdnsd/pdnsd.conf"
+
+# Backup suffix
+BACKUPSUFFIX=".backup"
+
+# Load our variables from resolvconf
+eval "$(/sbin/resolvconf -v)"
+
+COMMENT='
+# Automatically generated by resolvconf.
+#
+# Following server sections are automatically enabled and disabled.
+#
+# !!! WARNING !!!
+# DO NOT RENAME LABELS!
+#
+# No section will be deleted and only some options are automatically changed.
+# Feel free to add your own options, but do not use pair comments /* */ as they
+# are not recognised.
+#
+# DO NOT USE resolvconf ANYWHERE IN YOUR LABELS!
+#
+# Automatically changed options are (with examples):
+# preset=on;
+# ip="192.168.0.1","192.168.0.2";
+# include=".net",".com";
+# exclude=".domain.net",".domain.com";
+# policy=excluded;
+#
+# The exclude directive is changed automatically only in "resolvconf" server
+# section. Not handled servers are kept in the directive.
+#'
+BASIC_SETTINGS='server {
+ label="resolvconf";
+ preset=off;
+}'
+
+INSTALLATION_CHECK='^[[:space:]]*label[[:space:]]*=[[:space:]]*"resolvconf"'
+
+###
+# Sed script configuration
+#
+# Composed sequence of lines:
+#
+# (1) SED_LOOP with @MATCH_LABELS@ substituted by several SED_MATCH_ONE_LABEL
+# (2) SED_EDIT_ONE_SERVER several times
+# (3) SED_ADDING with new servers
+#
+# Notes:
+#
+# * @LABEL@ is a string "resolvconf-<domain>" or "resolvconf" for global
+# section
+# * @RULE@ is @LABEL@ with translated characters '-' and '.' into '_'.
+###
+
+###
+# Main loop with label match - it will redirect the processing to
+# SED_EDIT_ONE_SERVER, when the label match is found. Special match is
+# for "resolvconf" label - the control flow is redirected to SED_ADDING to
+# allow adding new sections.
+#
+# To summarize: Old sections are edited as they appear in the file and new
+# sections are added before the "resolvconf" section.
+SED_LOOP=\
+'/^[[:space:]]*server[[:space:]]*[\{]/ b server;
+p; d;
+:server; h;
+:server_loop; n;
+/^[[:space:]]*server[[:space:]]*[\{]/ { x; p; b server_loop; };
+@MATCH_LABELS@/^[[:space:]]*label[[:space:]]*=[[:space:]]*"resolvconf"/ { H; b adding; };
+/^[[:space:]]*[\}]/ { H; x; p; d; };
+H;
+b server_loop;'
+
+###
+# Match for one label with a jump to SED_EDIT_ONE_SERVER
+SED_MATCH_ONE_LABEL=\
+'/^[[:space:]]*label[[:space:]]*=[[:space:]]*"@LABEL@"/ { H; x; b main_@RULE@; };'
+
+###
+# Editing one server. New lines are put into @SETUP@, lines are composed
+# in function compose_lines(). After the new lines are added, all "preset",
+# "ip" and "include" options are removed (not printed).
+#
+# Sanity checks: Check if there is a second label or another server directive.
+# In both cases, there is some error in the file, so go to the beginning by
+# jumping to SED_LOOP's :server.
+SED_EDIT_ONE_SERVER=\
+':main_@RULE@;
+p; @SETUP@
+:loop_@RULE@;
+n;
+/^[[:space:]]*server[[:space:]]*[\{]/ b server;
+/^[[:space:]]*label[[:space:]]*=/ b server;
+/^[[:space:]]*preset[[:space:]]*=/ b loop_@RULE@;
+/^[[:space:]]*ip[[:space:]]*=/ b loop_@RULE@;
+/^[[:space:]]*include[[:space:]]*=/ b loop_@RULE@;
+/^[[:space:]]*policy[[:space:]]*=/ b loop_@RULE@;
+/^[[:space:]]*exclude[[:space:]]*=/ b exclude_logic_@RULE@;
+p;
+/^[[:space:]]*[\}]/ d;
+b loop_@RULE@;
+
+:exclude_logic_@RULE@;
+@EXCLUDE_LOGIC@
+b loop_@RULE@;
+'
+
+###
+# Add new servers. All lines composed by function compose_lines() are put into
+# @SETUP@. Then the control flow is returned to one special SED_EDIT_ONE_SERVER
+# section with label "resolvconf".
+SED_ADDING=\
+':adding;
+@SETUP@
+x; b main_resolvconf;
+'
+
+
+###
+# Edit the domain list (include/exclude). All empty fields and matching domains
+# are removed. Unmaintained domains (not in resolvconf-<domain>) are kept. All
+# domains should be in a pipe (|) separated list and should begin, but not end
+# with a dot. The list is put into @DOMAINS@. The control flow continues, where
+# it ended in SED_EDIT_ONE_SERVER.
+#
+SED_DOMAIN_LIST_LOGIC=\
+'h;
+s/^([[:space:]]*@DIRECTIVE@[[:space:]]*=[[:space:]]*).*/\\1/;
+x;
+s/^[[:space:]]*@DIRECTIVE@[[:space:]]*=[[:space:]]*//;
+
+:@DIRECTIVE@_loop_@RULE@;
+/([[:space:]]*("[^"]"*|[^,;]*)[[:space:]]*,)*[[:space:]]*("(@DOMAINS@|)\.?"|(@DOMAINS@)\.?|,)[[:space:]]*[,;]/ {
+ s/(([[:space:]]*("[^"]"*|[^,;]*)[[:space:]]*,)*[[:space:]]*)("(@DOMAINS@|)\.?"|(@DOMAINS@)\.?|,)[[:space:]]*([,;])/\\1\\7/;
+ b @DIRECTIVE@_loop_@RULE@;
+};
+
+s/^[,;]//g;
+/^[[:space:]]*$/ b @DIRECTIVE@_end_@RULE@;
+H; x; s/\\n//; p;
+:@DIRECTIVE@_end_@RULE@;
+'
+
+################################################################################
+# Functions
+
+###
+# char* [] uniqify(char* list[])
+#
+# Uniqify the items in the list
+uniqify() {
+ local result=
+ while [ -n "$1" ] ; do
+ case " ${result} " in
+ *" $1 "*) ;;
+ *) result="${result} $1" ;;
+ esac
+ shift
+ done
+ printf "%s" "${result# *}"
+}
+
+###
+# char *make_pdnsd_label(char *domain)
+#
+# Translate domain name into pdnsd's label
+make_pdnsd_label() {
+ local domain="$1"
+ if [ -n "${domain}" ] ; then
+ printf "%s" "resolvconf-${domain}"
+ else
+ printf "%s" "resolvconf"
+ fi
+}
+
+
+###
+# char *replace(char *text, char *search, char *replace)
+#
+# Replaces all the found "search" occurences in the "text" with the "replace".
+replace() {
+ local text="$1" search="$2" replace="$3"
+ local pre post="${text}" result=""
+ while [ x"${pre}" != x"${text}" ] ; do
+ post="${text}"
+ pre="${text%%$search*}"
+ post="${text#*$search}"
+ if [ x"${pre}" != x"${text}" ] ; then
+ result="${result}${pre}${replace}"
+ text="${post}"
+ fi
+ done
+ printf "%s" "${result}${post}"
+}
+
+###
+# char *make_sed_label(char *pdnsd_label)
+#
+# Translate pdnsd's label into sed's label
+make_sed_label() {
+ local label="$1"
+ label="$(replace "${label}" "-" "_")"
+ label="$(replace "${label}" "." "_")"
+ printf "%s" "${label}"
+}
+
+# char *compose_lines(...)
+#
+# Compose a sed command that prints lines
+compose_lines() {
+ local line result
+ for line in "$@" ; do
+ result="${result}i\\\\\\n$(replace "${line}" " " "\\t")\\n"
+ done
+ printf "%s" "${result}"
+}
+
+###
+# char *build_settings(char *nameservers, char *domains, char *directive)
+#
+# Builds configuration part @SETUP@ of sed script. The directive parameter denotes
+# if the domains are to be included ("include") or excluded ("exclude"). This
+# involves options like
+#
+# (1) # [nameserver list is empty]
+# preset=off;
+#
+# (2) # [domain list is empty]
+# preset=on;
+# ip="address","address"...;
+#
+# (3) # [directive=="include"]
+# preset=on;
+# ip="address","address"...;
+# include=".domain.",".domain."...;
+# policy=excluded;
+#
+# (4) # [directive=="exclude"]
+# preset=on;
+# ip="address","address"...;
+# exclude=".domain.",".domain."...;
+# policy=included;
+#
+# Note: Currently there will always be only one domain in "include" directive.
+#
+build_settings() {
+ local ns="$1" domains="$2" directive="$3"
+ if [ -n "${ns}" ] ; then
+ local x list_ns list_domains
+ for x in ${ns} ; do
+ list_ns="${list_ns},\"${x}\""
+ done
+ list_ns="${list_ns#,}"
+ if [ -n "${domains}" ] ; then
+ for x in ${domains} ; do
+ list_domains="${list_domains},\".${x}.\""
+ done
+ list_domains="${list_domains#,}"
+ if [ x"$directive" = x"include" ]; then
+ compose_lines \
+ " preset=on;" \
+ " ip=${list_ns};" \
+ " include=${list_domains};" \
+ " policy=excluded;"
+ else
+ compose_lines \
+ " preset=on;" \
+ " ip=${list_ns};" \
+ " exclude=${list_domains};" \
+ " policy=included;"
+ fi
+ else
+ compose_lines \
+ " preset=on;" \
+ " ip=${list_ns};"
+ fi
+ else
+ compose_lines \
+ " preset=off;"
+ fi
+}
+
+###
+# char *build_match_labels(char *domains...)
+#
+# Build the label match part of the sed script
+#
+build_match_labels() {
+ local domain result label destination new_match
+ for domain in "$@" ; do
+ label="$(make_pdnsd_label "${domain}")"
+ rule="$(make_sed_label "${label}")"
+ new_match="$(replace "${SED_MATCH_ONE_LABEL}" "@LABEL@" "${label}")"
+ new_match="$(replace "${new_match}" "@RULE@" "${rule}")"
+ result="${result}${new_match}\n"
+ done
+ printf "%s" "${result}"
+}
+
+###
+# char *build_domain_list_logic(char *domains, char *directive)
+#
+# Build a logic for changing (removing) domains from a directive.
+#
+build_domain_list_logic() {
+ local domains="$1" directive="$2"
+ local x domain_list logic
+
+ # Domains should be pipe separated list
+ for x in ${domains}; do
+ x=".${x%.}"
+ x="$(replace "${x}" "." "\\.")"
+ domain_list="${domain_list}|${x}"
+ done
+ domain_list="${domain_list#|}"
+
+ if [ -z "${domain_list}" ]; then
+ logic="p;"
+ else
+ logic="$(replace "${SED_DOMAIN_LIST_LOGIC}" "@DOMAINS@" "${domain_list}")"
+ logic="$(replace "${logic}" "@DIRECTIVE@" "${directive}")"
+ fi
+ printf "%s" "${logic}"
+}
+
+###
+# char *build_edit_part(char *domain, char *nameservers, \
+# char *add_domains, char *remove_domains,
+# char *directive)
+#
+# Build edit part of the sed script for a particular domain. Domain can be
+# empty in the case it is the "resolvconf" server part.
+#
+build_edit_part() {
+ local domain="$1" nameservers="$2" add_domains="$3" remove_domains="$4"
+ local directive="$5"
+ local setup label rule logic result
+
+ setup="$(build_settings "${nameservers}" "${add_domains}" "${directive}")"
+ label="$(make_pdnsd_label "${domain}")"
+ rule="$(make_sed_label "${label}")"
+ logic="$(build_domain_list_logic "${remove_domains}" "${directive}")"
+ result="$(replace "${SED_EDIT_ONE_SERVER}" "@SETUP@" "${setup}")"
+ result="$(replace "${result}" "@EXCLUDE_LOGIC@" "${logic}")"
+ result="$(replace "${result}" "@RULE@" "${rule}")"
+ printf "%s\n" "${result}"
+}
+
+###
+# char *get_domain_nameservers(char *domain, char *domain_config...)
+#
+# Get the list of nameservers belonging to one particular domain.
+#
+# Domain configuration is a space separated list of pair <domain>,<ip>.
+#
+get_domain_nameservers() {
+ local domain="$1" ns
+ shift
+ for x in "$@" ; do
+ if [ x"${x%,*}" = x"${domain}" ] ; then
+ ns="${ns} ${x#*,}"
+ fi
+ done
+ ns="$(uniqify ${ns})"
+ printf "%s" "${ns}"
+}
+
+###
+# char *build_domain_edit_part(char *domain, char *domain_config...)
+#
+# Parse the list of domain configurations and build settings for one particular
+# domain for the sed script.
+#
+# Domain configuration is a space separated list of pair <domain>,<ip>.
+#
+build_domain_edit_part() {
+ local domain="$1" ns
+ shift
+ ns="$(get_domain_nameservers "${domain}" "$@")"
+ build_edit_part "${domain}" "${ns}" "${domain}" "" "include"
+}
+
+###
+# char *build_add_part(char *add, char *domains...)
+#
+# Build add part of the sed script for all domains that needs to be added
+#
+build_add_part() {
+ local add="$1" x label rule add_part new_part result
+ shift
+ for x in ${add} ; do
+ local domain="${x}" ns
+ ns="$(get_domain_nameservers "${domain}" "$@")"
+ label="$(make_pdnsd_label "${domain}")"
+ rule="$(make_sed_label ${label})"
+ new_part="$(compose_lines "server {" " label=\"${label}\";")"
+ new_part="${new_part}$(build_settings "${ns}" "${domain}" "include")"
+ new_part="${new_part}$(compose_lines "}" "")"
+ add_part="${add_part}${new_part}"
+ done
+ result="$(replace "${SED_ADDING}" "@SETUP@" "${add_part}")"
+ printf "%s" "${result}"
+}
+
+###
+# char *build_sed_script(char *nameservers, char *domain_config,
+# char *change, char *add,
+# char *active_domains, char *known_domains)
+#
+# Build the full sed script from the list of nameservers, list of domains
+# (in format <domain>,<ip>), list of changed domains, list of added domains,
+# list of activly used domains and a list of all known domains.
+#
+build_sed_script() {
+ local ns="$1" domain_config="$2" change="$3" add="$4"
+ local active_domains="$5" known_domains="$6"
+
+ local match_labels="$(build_match_labels ${change})"
+
+ local edit_changed x
+ for x in ${change} ; do
+ edit_changed="${edit_changed}$( \
+ build_domain_edit_part "${x}" ${domain_config})"
+ done
+ edit_changed="${edit_changed}$( \
+ build_edit_part "" "${ns}" "${active_domains}" "${known_domains}" "exclude")"
+
+ local added
+ added="$(build_add_part "${add}" ${domain_config})"
+
+ local full
+ full="$(replace "${SED_LOOP}" "@MATCH_LABELS@" "${match_labels}")"
+ printf "%b\n" "${full}"
+ printf "%b\n" "${edit_changed}"
+ printf "%b" "${added}"
+}
+
+###
+# char *read_configured_domains(char *config_file)
+#
+# Reads labels of servers starting with resolvconf* from the configuration file.
+#
+read_configured_domains() {
+ local config_file="$1" result
+ result="\
+ $(sed -nre 's/^[[:space:]]+label=\"?resolvconf-([^;\"]*)\";.*/\1/p' \
+ ${config_file})"
+ printf "%s" "${result}"
+}
+
+###
+# void installation_check(char *config_file)
+#
+# Check if the pdnsd is installed and can be configured. Prepare also the file
+# for resolvconf.
+#
+installation_check() {
+ local config_file="$1"
+ if [ -e "${config_file}" ] ; then
+ if ! grep ${INSTALLATION_CHECK} "${config_file}" >/dev/null 2>&1; then
+ printf "%s\n" "${COMMENT}" >> "${config_file}"
+ printf "\n%s\n" "${BASIC_SETTINGS}" >> "${config_file}"
+ fi
+ return 0
+ else
+ return 1
+ fi
+}
+
+###
+# void initialization(char *config_file)
+#
+# Setup basic variables NAMESERVERS, DOMAINS an CONFIGURED_DOMAINS
+#
+initialization() {
+ local config_file="$1"
+
+ # Compatibility fix for new openresolv-2.0
+ if [ -z "${NEWNS}" -a -n "${NAMESERVERS}" ]; then
+ NEWDOMAIN=$(replace "${DOMAINS}" ":" ",")
+ NEWSEARCH=
+ NEWNS=${NAMESERVERS}
+ DOMAINS=
+ NAMESERVERS=
+ SEARCH=
+ fi
+
+ for N in ${NEWNS} ; do
+ NAMESERVERS="${NAMESERVERS} ${N}"
+ done
+
+ for N in ${NEWSEARCH} ; do
+ NAMESERVERS="${NAMESERVERS} ${N#*,}"
+ done
+
+ for DN in ${NEWDOMAIN} ; do
+ DOMAINS="${DOMAINS} ${DN%%,*}"
+ done
+
+ CONFIGURED_DOMAINS=$(read_configured_domains ${config_file})
+
+ NAMESERVERS=$(uniqify ${NAMESERVERS})
+ DOMAINS=$(uniqify ${DOMAINS})
+ CONFIGURED_DOMAINS=$(uniqify ${CONFIGURED_DOMAINS})
+}
+
+###
+# void find_changed_and_added(char *configured, char *domains)
+#
+# Find already configured and newly added domains. Sets variables
+# CHANGE_DOMAINS, ADD_DOMAINS and KNOWN_DOMAINS.
+#
+find_changed_and_added() {
+ local configured="$1" domains="$2" x
+
+ KNOWN_DOMAINS="${CONFIGURED_DOMAINS} ${DOMAINS}"
+
+ # Find what has to be disabled
+ for x in ${configured} ; do
+ case " ${domains} " in
+ *" ${x} "*) ;;
+ *) CHANGE_DOMAINS="${CHANGE_DOMAINS} ${x}" ;;
+ esac
+ done
+
+ # Find what has to be added
+ for x in ${domains} ; do
+ case " ${configured} " in
+ *" ${x} "*) CHANGE_DOMAINS="${CHANGE_DOMAINS} ${x}" ;;
+ *) ADD_DOMAINS="${ADD_DOMAINS} ${x}" ;;
+ esac
+ done
+
+ ADD_DOMAINS=$(uniqify ${ADD_DOMAINS})
+ CHANGE_DOMAINS=$(uniqify ${CHANGE_DOMAINS})
+ KNOWN_DOMAINS=$(uniqify ${KNOWN_DOMAINS})
+}
+
+###
+# bool make_configuration_change(char *config_file, char *backup_suffix,
+# char *sed_script)
+#
+# Applies any configuration change. Returns true, if there was a change.
+#
+make_configuration_change() {
+ local config_file="$1" backup_suffix="$2" sed_script="$3"
+ local old_config new_config
+
+ old_config="$(cat "${config_file}")"
+
+ # Sanity check: add '}' at the end of the file
+ new_config=$( (printf "%s" "${old_config}" && printf "\n}" ) | \
+ sed -nre "${sed_script}")
+ # Now remove what we added
+ new_config=${new_config%?\}}
+
+ if [ x"${old_config}" != x"${new_config}" ] ; then
+ cp ${config_file} ${config_file}${backup_suffix}
+ printf "%s\n" "${new_config}" > "${config_file}"
+ return 0
+ else
+ return 1
+ fi
+}
+
+################################################################################
+# Main part
+
+# Check, if pdnsd configuration file is installed and possibly prepare it
+installation_check "${PDNSDCONFIG}" || exit 0
+
+# Basic initialization of NAMESERVERS, DOMAINS and CONFIGURED_DOMAINS
+initialization "${PDNSDCONFIG}"
+
+find_changed_and_added "${CONFIGURED_DOMAINS}" "${DOMAINS}"
+
+sed_script="$(build_sed_script "${NAMESERVERS}" "${NEWDOMAIN}" \
+ "${CHANGE_DOMAINS}" "${ADD_DOMAINS}" \
+ "${DOMAINS}" "${KNOWN_DOMAINS}")"
+
+# Check if the config changed
+if make_configuration_change "${PDNSDCONFIG}" "${BACKUPSUFFIX}" "${sed_script}" ; then
+ # Checks for running pdnsd
+ [ -x /usr/sbin/pdnsd-ctl ] || exit 0
+ [ -e /var/cache/pdnsd/pdnsd.status ] || exit 0
+
+ # Reload config files
+ /usr/sbin/pdnsd-ctl config >/dev/null 2>&1
+fi
+
+exit 0