Commit d7d737de authored by Yuanle Song's avatar Yuanle Song
Browse files

before rewrite to conform to Dyn client Policies. 

- added changelog;
- added bts;
- split config file from ddclient-http;
  example-config-file shipped with project;
- crontab gap increased to 4 minutes;
parent 97d9abfd

README

+4 −14
Original line number Diff line number Diff line 
Date: 2012-05-10

Time-stamp: <2012-05-10>

Time-stamp: <2012-05-27>



the ddclient package seems *weak*.

it does not keep the domain up-to-date.
@@ -32,16 +32,6 @@ it does not report errors. 
  dig

  make



* TODO split config from source code.

  config variables should be set in /etc/ddclient-http.conf

  and it can be sourced by the source code.



  move username, password, domain name, update URL to $HOME/.ddclient-httprc



  then source that at run time.



* TODO BUG when I just updated my domain.

  I do a dig, I get the old IP. I try a new update. I get "nochg".

  will I be blocked?



  extend crontab gap to 3 minutes?
 
* start to use bugzilla to track feature requests and bugs.

  for open bugs see

  http://localhost/bugzilla3/buglist.cgi?product=ddclient-http&component=core&resolution=---

changelog

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+11 −0
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# -*- mode: org -*-

Date: 2012-05-27

Time-stamp: <2012-05-27>



* 

* v0.1.1

  - split config from executable.

  - update app according to Dyn policies and guidelines.

  - 

* v0.1.0

  - init version. was used to update sylecn01.dnsd.me.

doc/example-config-file

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+14 −0
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# -*- mode: sh -*-

# config file should be saved to $HOME/.ddclient-http



# example config file for dyn.com. for other hosts, you need to modify

# UPDATE_URL.

#

# Note: you should always use https URL if it's available. If you use http,

# your username and password can be sniffed very easily.



USERNAME=

PASSWORD=

HOSTNAME=

# using printf syntax, with %s being the new IP.

UPDATE_URL="https://$USERNAME:$PASSWORD@members.dyndns.org/nic/update?hostname=$HOSTNAME&myip=%s&wildcard=NOCHG&mx=NOCHG&backmx=NOCHG"

done

0 → 100644
+14 −0
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* DONE split config from source code.

  config variables should be set in /etc/ddclient-http.conf

  and it can be sourced by the source code.



  move username, password, domain name, update URL to $HOME/.ddclient-httprc



  then source that at run time.



* DONE BUG when I just updated my domain. I do a dig, I get the old IP. 

  I try a new update. I get "nochg". I might get blocked if this happens

  often.



  extended crontab gap to 4 minutes. Since most Dynamic host has a TTL of 60s,

  this should be OK.

src/bin/ddclient-http

+17 −9
Original line number Diff line number Diff line
@@ -4,23 +4,20 @@ 
# run 'make install' to install this program.



PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin

CONFIG_FILE="$HOME/.ddclient-http"



# exit codes

GET_MYIP_FAILED=1

DIG_FAILED=2

UPDATE_REQUEST_FAILED=3

UPDATE_REJECTED=4

NO_CONF=50



# stores responses from remote DDNS provider's server.  usually it will be

# very short, like a word or two. but if there is a server error, it could be

# long.

HTTP_RESPONSE=/tmp/ddclient-http-api.html



# which host to update and it's credentials.

USERNAME=s12nospam@hotmail.com

PASSWORD=songyl

HOSTNAME=sylecn01.dnsd.me



# Usage: log [MESSAGE..]

log() {

	logger -t ddclient_http "$@"
@@ -31,6 +28,15 @@ err() { 
	logger -t ddclient_http -p user.err "$@"

}



# which host to update and it's credentials.

if [ -f "$CONFIG_FILE" ]; then

	. "$CONFIG_FILE"

else

	err "Error: No config file found at $CONFIG_FILE."

	echo "Error: No config file found at $CONFIG_FILE." > /dev/stderr

	exit $NO_CONF

fi



# set MYIP variable to my internet IP address.

# Returns true on success, false on failure.

get_myip() {
@@ -46,7 +52,7 @@ get_myip() { 


# returns true if domain is outdated. returns false otherwise.

require_update() {

	OLDIP=`dig +short sylecn01.dnsd.me`

	OLDIP=`dig +short $HOSTNAME`

	# TODO dig can fail when network is down or DNS server is blocked by

	# GFW. check dig command's exit code.

	#
@@ -66,8 +72,10 @@ require_update() { 


do_update() {

	log "update $HOSTNAME using IP $MYIP"

	curl -s -o "$HTTP_RESPONSE" -u "$USERNAME":"$PASSWORD" \

		"https://www.dnsdynamic.org/api/?hostname=$HOSTNAME&myip=$MYIP"

	URL=`printf $UPDATE_URL $MYIP`

	curl -s -o "$HTTP_RESPONSE" "$URL"

	exit 0



	# check curl EXIT CODES

	CURL_EXIT_CODE=$?

	case $CURL_EXIT_CODE in
@@ -86,7 +94,7 @@ do_update() { 
	case "$KEYWORD" in

		good) log "good: update accepted."

			return 0 ;;

		nochg) log "nochg: IP not changed." ;;

		nochg) err "nochg: IP not changed." ;;

		badauth) err "badauth: user or password incorrect." ;;

		abuse) err "abuse: hostname is blocked for update abuse." ;;

		dnserr) err "dnserr: DNS error encountered." ;;