[bug-mailutils] mailutils and ipv6

[Daniel 'NebuchadnezzaR' Dehennin]

Hello,

I have make some work to make imap4d ipv6 capable, but I have
some difficulties to clearly see who needs which.

Firstly, I regrep the source tree searching some sockaddr_in,
gethostbyname &co., inet_ntoa &co., etc, to replace them by ipv6
capable structures and functions (sockaddr_storage, getaddrinfo...).

I have a problem with mailbox/tcp.c, it defines:
struct _tcp_instance {
        int             fd;
        char            *host;
        int             port;
        int             state;
        unsigned long   address;
};

where the "address" member is a problem between ipv4 and ipv6.

I do not have much experiment but I can make some proposals and you
will tell me if I'm in the good way.

We can have a:
struct _tcp_instance {
       int                      fd;
       int                      state;
       struct sockaddr_storage  *host
}

The sockaddr_storage embedded the host, port and address.

I have tracked the use of it, it's limited in tcp.c but it's embedded
in stream_t and I need to look more over the sources to see how it's
used.

I'm waiting any comment if I'm the wrong way or if you have some
important points I must know.

Thanks.
-- 
Daniel 'NebuchadnezzaR' Dehennin

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