Bug 680996 - curl wrongly parses link-local IPv6 addresses used for proxy
Summary: curl wrongly parses link-local IPv6 addresses used for proxy
Alias: None
Product: Fedora
Classification: Fedora
Component: curl
Version: 19
Hardware: Unspecified
OS: Unspecified
Target Milestone: ---
Assignee: Kamil Dudka
QA Contact: Fedora Extras Quality Assurance
Depends On:
TreeView+ depends on / blocked
Reported: 2011-02-28 18:04 UTC by Till Maas
Modified: 2014-05-26 23:58 UTC (History)
3 users (show)

Fixed In Version: curl-7.29.0-19.fc19
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2014-05-16 10:08:36 UTC
Type: ---

Attachments (Terms of Use)

Description Till Maas 2011-02-28 18:04:26 UTC
Description of problem:
If I use a link-local IPv6 to define a proxy for curl to use, curl expects them in a wrong format as far as I can tell.

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. Get a link local IP address from your current interface:
declare address=$(LANG=C ifconfig eth1 | grep inet6 | cut -d: -f 2- | cut -d/  -f 1 | cut -d\  -f 2)
(echo $address looks like:
2. Use it as proxy:
LANG=C curl --proxy "http://[${address}%eth1]:1122" http://fedoraproject.org
curl: (5) Could not resolve proxy: fe80::...:aabb%eth1]; No such device
3. Use a bad syntax:
curl --proxy "http://[${address}%eth1:1122" http://fedoraproject.org
-> it works
curl --proxy "http://[${address}%eth1:1122]" http://fedoraproject.org
Actual results:
It works when the port is specified inside the square-brackets, but it does not work when the port is specified outside the square-brackets

Expected results:
The port should be recognized if it is specified after the brackets.

Additional info:
http://www.ietf.org/rfc/rfc2732.txt says that the IPv6-address is specified in brackets and the port follows. But I did not find special notes about link-local addresses that also contain a ethernet interface.

Comment 2 Till Maas 2011-02-28 20:11:53 UTC
Note to myself.
The function in lib/url.c that is probably resposible for the parsing has been changed in upstream since the version currently in Fedora. I need to recheck with versions in Rawhide or F15.

Comment 3 Kamil Dudka 2011-02-28 21:09:29 UTC
That file is being changed quite often -- currently 34 commits since 7.21.0, but nothing related IMHO:

$ git clone git@github.com:bagder/curl.git
$ cd curl
$ git log curl-7_21_0.. lib/url.c

Maybe faster to look for changes here:

$ git log curl-7_21_0.. -p docs/KNOWN_BUGS

Comment 4 Fedora End Of Life 2012-08-16 21:27:48 UTC
This message is a notice that Fedora 14 is now at end of life. Fedora 
has stopped maintaining and issuing updates for Fedora 14. It is 
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of '14' have been closed as WONTFIX.

(Please note: Our normal process is to give advanced warning of this 
occurring, but we forgot to do that. A thousand apologies.)

Package Maintainer: If you wish for this bug to remain open because you
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Comment 5 Till Maas 2014-03-15 18:29:55 UTC
still a bug in Fedora 19, but soon I will submit patches upstream.

Comment 6 Till Maas 2014-03-15 18:47:05 UTC
My Patches are here (I submitted them to the curl-library mailing list):

Comment 7 Till Maas 2014-03-15 21:51:47 UTC
Upstream patches:

Comment 8 Kamil Dudka 2014-03-15 22:49:17 UTC
Thank you for working on this!  I will keep watching the upstream submission...

Comment 10 Kamil Dudka 2014-04-02 13:29:46 UTC
fixed in curl-7.36.0-2.fc21

Comment 11 Fedora Update System 2014-05-10 18:13:26 UTC
curl-7.29.0-19.fc19 has been submitted as an update for Fedora 19.

Comment 12 Fedora Update System 2014-05-10 18:13:41 UTC
curl-7.32.0-10.fc20 has been submitted as an update for Fedora 20.

Comment 13 Fedora Update System 2014-05-12 05:22:40 UTC
Package curl-7.32.0-10.fc20:
* should fix your issue,
* was pushed to the Fedora 20 testing repository,
* should be available at your local mirror within two days.
Update it with:
# su -c 'yum update --enablerepo=updates-testing curl-7.32.0-10.fc20'
as soon as you are able to.
Please go to the following url:
then log in and leave karma (feedback).

Comment 14 Fedora Update System 2014-05-16 10:08:36 UTC
curl-7.32.0-10.fc20 has been pushed to the Fedora 20 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 15 Fedora Update System 2014-05-26 23:58:22 UTC
curl-7.29.0-19.fc19 has been pushed to the Fedora 19 stable repository.  If problems still persist, please make note of it in this bug report.

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