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Re: Re: IPv6 Support

From: keshav krity <keshavkrity_at_rediffmail.com>
Date: 11 Dec 2008 14:45:45 -0000

Hi,   Thanks for the reply. My apologies for not mentioning the system details.   I am using curl 3.x version on a linux(fedora 8). There are many formats of IPv6-IPv4 mixed addressing. I require to connect to IP of the following format. http://[2001:1890:110b:151e:20d:56ff:254.197.153.216] Browser(Mozilla) is able to resolve this link. But libcurl gives -> getaddrinfo(3) failed. Any idea why is it not working for this format ? Thanking you KeshavK On Wed, 10 Dec 2008 Phil Blundell wrote : >On Wed, 2008-12-10 at 13:25 +0000, keshav krity wrote: > > Does lib-curl support mixed addressing of the format that has IPv4 > > address embedded into the an IPv6 address. Example : > > 805B:2D9D:DC28::FC57:212.200.31.255 > >You didn't mention what OS you are using, what version of libcurl you >have, or what resolver library it was configured to use, so it is >difficult to say exactly what would be causing your problem. However, >addresses in this form do work OK for me using c-ares under Linux: > >$ strace -f ./curl -g http://[805B:2D9D:DC28::FC57:212.200.31.255]/ 2>&1 >|grep 805b >connect(3, {sa_family=AF_INET6, sin6_port=htons(80), inet_pton(AF_INET6, >"805b:2d9d:dc28::fc57:d4c8:1fff", &sin6_addr), sin6_flowinfo=0, >sin6_scope_id=0}, 28) = -1 EINPROGRESS (Operation now in progress) >$ > >p. > Hi All, Does lib-curl support mixed addressing of the format that has IPv4 address embedded into the an IPv6 address. Example : 805B:2D9D:DC28::FC57:212.200.31.255 This is the sample code that I wrote #include <stdio.h> #include <curl/curl.h> int main(void) { CURL *curl; CURLcode res; curl = curl_easy_init(); if(curl) { curl_easy_setopt(curl, CURLOPT_URL, "/*any mixed address*/"); curl_easy_setopt( curl, CURLOPT_VERBOSE, 1 ); res = curl_easy_perform(curl); /* always cleanup */ curl_easy_cleanup(curl); } return 0; } When I provide pure IPv6 address it works fine but when I try with mixed address as mentioned above I get the following *error.getaddrinfo(3) failed for IP: ... * Couldn't resolve host * Closing connection #0 * couldn't resolve host name Is there a problem in the way I am implementing or is mixed addressing not supported by lib-curl?
Received on 2008-12-11

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