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[curl:bugs] #1337 7.35.0 issues with localhost

From: Daniel Stenberg <bagder_at_users.sf.net>
Date: Tue, 18 Mar 2014 08:12:16 +0000

But that's the point, it goes through the IPv6 addresses first and then it should switch to the IPv4 one(s). In my case it didn't properly switch back to the IPv4 one so it never tries that which is what my patch tries to fix.

It should try "the other" family from connect.c:832 if all the first family ones failed. Can you single step through that second attempt and see what happens?

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** [bugs:#1337] 7.35.0 issues with localhost**
**Status:** open-confirmed
**Created:** Sat Feb 22, 2014 11:44 PM UTC by ricker
**Last Updated:** Tue Mar 18, 2014 08:06 AM UTC
**Owner:** Daniel Stenberg
After upgrading to curl 7.35.0 and rebuilding transmission torrent server and client, the client could no longer connect to localhost:9091, it now always results in a connection refused. The only way I could get it to connect was to remove one of the following lines from my /etc/hosts:
::1 localhost
fe80::1%lo0 localhost
But those are standard mappings, so removing them could result in more widespread issues. I was instead able to work arround the issue by having transmission connect to 127.0.0.1 instead of localhost.
I ran into another issue that is probably related, when trying to install a new version of a perl module that wraps curl (LWP::Protocol::Net::Curl). The module includes a test to verify error-handling by trying to connect to a non-existent server at 127.0.0.1:0, but curl is somehow instead connecting to my local webserver on port 80. Even with the standard curl client. No other http client I tried experiences this problem, the others all result in the expected "can't connect" error.
$ curl http://127.0.0.1:0/
<html><body><h1>It works!</h1></body></html>
$ curl http://127.0.0.1:1337/
curl: (7) Failed to connect to 127.0.0.1 port 1337: Connection refused
Neither of these problems existed with 7.34.0. I'm running OS X 10.9, curl @7.35.0_0+ssl is installed from Macports.
$ curl -V
curl 7.35.0 (x86_64-apple-darwin13.0.0) libcurl/7.35.0 OpenSSL/1.0.1f zlib/1.2.8 libidn/1.26
Protocols: dict file ftp ftps gopher http https imap imaps pop3 pop3s rtsp smtp smtps telnet tftp
Features: IDN IPv6 Largefile NTLM NTLM_WB SSL libz TLS-SRP
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Received on 2014-03-18

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