[Bug 1775876] [NEW] wget cannot handle local-link IPv6 address

Fri Jun 8 15:35:57 UTC 2018

Public bug reported:

GNU Wget 1.17.1 built on linux-gnu. (Ubuntu 16.04 amd64)

IPv6 local link addresses (fe80::/10) are tricky. Network interface has
to be specified to tell OS what interface to use. wget cannot handle
that

First, IPv6 address, no interface specified, it fails with an error
(error comes from OS)

user at test:~$ wget http://[fe80::87f4:81fa:b481:d781]/test.html
--2018-06-08 17:29:08--  http://[fe80::87f4:81fa:b481:d781]/test.html
Connecting to [fe80::87f4:81fa:b481:d781]:80... failed: Invalid argument.

Second, IPv6 address with interface specified (%enp4s0 added to IPv6
address), wget cannot handle this address format (and this bug report is
about this case)

user at test:~$ wget http://[fe80::87f4:81fa:b481:d781%enp4s0]/test.html
http://[fe80::87f4:81fa:b481:d781%enp4s0]/test.html: Invalid IPv6 numeric address.

Compared with CURL, that can do it

First, IPv6 address without network interface, it fails with error from
OS

user at test:~$ curl http://[fe80::87f4:81fa:b481:d781]/test.html
curl: (7) Couldn't connect to server

Second, network interface is added and curl can handle it!

user at test:~$ curl http://[fe80::87f4:81fa:b481:d781%enp4s0]/test.html
<html><body>TEST</body></html>

CURL and WGET were tested at the same PC...

** Affects: wget (Ubuntu)
     Importance: Undecided
         Status: New

** Description changed:

  GNU Wget 1.17.1 built on linux-gnu. (Ubuntu 16.04 amd64)

  IPv6 local link addresses (fe80::/10) are tricky. Network interface has
  to be specified to tell OS what interface to use. wget cannot handle
  that

  First, IPv6 address, no interface specified, it fails with an error
  (error comes from OS)

  user at test:~$ wget http://[fe80::87f4:81fa:b481:d781]/test.html
  --2018-06-08 17:29:08--  http://[fe80::87f4:81fa:b481:d781]/test.html
  Connecting to [fe80::87f4:81fa:b481:d781]:80... failed: Invalid argument.

  Second, IPv6 address with interface specified (%enp4s0 added to IPv6
  address), wget cannot handle this address format (and this bug report is
  about this case)

  user at test:~$ wget http://[fe80::87f4:81fa:b481:d781%enp4s0]/test.html
  http://[fe80::87f4:81fa:b481:d781%enp4s0]/test.html: Invalid IPv6 numeric address.

  Compared with CURL, that can do it

  First, IPv6 address without network interface, it fails with error from
  OS

  user at test:~$ curl http://[fe80::87f4:81fa:b481:d781]/test.html
  curl: (7) Couldn't connect to server

  Second, network interface is added and curl can handle it!

  user at test:~$ curl http://[fe80::87f4:81fa:b481:d781%enp4s0]/test.html
  <html><body>TEST</body></html>
+ 
+ CURL and WGET were tested at the same PC...

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https://bugs.launchpad.net/bugs/1775876

Title:
  wget cannot handle local-link IPv6 address

Status in wget package in Ubuntu:
  New

Bug description:
  GNU Wget 1.17.1 built on linux-gnu. (Ubuntu 16.04 amd64)

  IPv6 local link addresses (fe80::/10) are tricky. Network interface
  has to be specified to tell OS what interface to use. wget cannot
  handle that

  First, IPv6 address, no interface specified, it fails with an error
  (error comes from OS)

  user at test:~$ wget http://[fe80::87f4:81fa:b481:d781]/test.html
  --2018-06-08 17:29:08--  http://[fe80::87f4:81fa:b481:d781]/test.html
  Connecting to [fe80::87f4:81fa:b481:d781]:80... failed: Invalid argument.

  Second, IPv6 address with interface specified (%enp4s0 added to IPv6
  address), wget cannot handle this address format (and this bug report
  is about this case)

  user at test:~$ wget http://[fe80::87f4:81fa:b481:d781%enp4s0]/test.html
  http://[fe80::87f4:81fa:b481:d781%enp4s0]/test.html: Invalid IPv6 numeric address.

  Compared with CURL, that can do it

  First, IPv6 address without network interface, it fails with error
  from OS

  user at test:~$ curl http://[fe80::87f4:81fa:b481:d781]/test.html
  curl: (7) Couldn't connect to server

  Second, network interface is added and curl can handle it!

  user at test:~$ curl http://[fe80::87f4:81fa:b481:d781%enp4s0]/test.html
  <html><body>TEST</body></html>

  CURL and WGET were tested at the same PC...

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