Changing the ubus message header fields from 'host' order to 'network' order
allows passing ubus messages between hosts with different endianity.
Example use (creating a ubus proxy):
on host A (e.g. big endian router already running ubusd), run:
$ socat TCP-LISTEN:5699,fork UNIX:/var/run/ubus.sock &
On host B (e.g. little endian development PC) run:
$ socat UNIX-LISTEN:/var/run/ubus.sock,fork TCP:<host A IP>:5699 &
Now ubus applications can be run on host B and seamlessly interact with ubus
applications on host A.
Signed-off-by: Eyal Birger <eyal.birger@gmail.com>
The realloc is problematic mostly with large packets, as the pointer changes
so what eventually gets free'd is invalid.
Note that ub ptr param in the call will be passed on to a ubus_msg_free(),
right after ubus_msg_ref() finishes.
This bug stayed hidden the same way as the bug in libubus writev_retry().
Since the write/sendmsg function can send about ~200k the ubus_msg_enqueue()
call does not get triggered.
