Re: [Qemu-devel] [PATCH 3/4] net: split hostname and service by last colon

[Amos Kong]

On 02/03/12 11:38, Amos Kong wrote:
> > > --- a/net.c
> > > +++ b/net.c
> > > @@ -84,7 +84,7 @@ static int get_str_sep(char *buf, int buf_size,
> > > const char **pp, int sep)
> > >       const char *p, *p1;
> > >       int len;
> > >       p = *pp;
> > > -    p1 = strchr(p, sep);
> > > +    p1 = strrchr(p, sep);
> > >       if (!p1)
> > >           return -1;
> > >       len = p1 - p;
> >
> > And what if the port isn't specified? I think you would erroneously
> > interpret the last part of the IP address as port.

Hi Kevin, port must be specified in '-incoming' parameters and migrate 
monitor cmd.

 qemu-kvm ... -incoming tcp:$host:$port
 (qemu) migrate -d tcp:$host:$port


If use boot up guest by wrong cmdline, qemu will report an error msg.

# ./x86_64-softmmu/qemu-system-x86_64 --enable-kvm -boot n -incoming 
tcp:2312::8272 -monitor stdio
qemu-system-x86_64: qemu: getaddrinfo: Name or service not known
tcp_server_start: Invalid argument
Migration failed. Exit code tcp:2312::8272(-22), exiting.

> IPv6 address have paired colons, need more precision check.

------

parse_host_port() are used in four functions in net/socket.c:
 tcp_start_outgoing_migration()
 tcp_start_incoming_migration()
 net_socket_mcast_init()
 net_socket_udp_init()

The argument type of parse_host_port() needs to be changed
if we replace inet_aton/gethostbyname by getaddrinfo.

So I will not change parse_host_port(), and verify Ipv6 addr
in tcp_start_common without parse_host_port.


--
                        Amos.