Date: Fri, 14 Aug 2009 19:01:42 +0000 From: bertwiley@gmail.com To: "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net>, bert wiley <bertwiley@gmail.com> Cc: freebsd-hackers@freebsd.org Subject: Re: Re: Need help trying to to use the ntohl() call with in_addr Message-ID: <0016e640d1e0ca8bd304711eaeb7@google.com> In-Reply-To: <20090814080915.J93661@maildrop.int.zabbadoz.net>
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Thanks guys
On Aug 14, 2009 4:11am, "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net>
wrote:
> On Fri, 14 Aug 2009, Max Laier wrote:
> On Friday 14 August 2009 05:29:19 bert wiley wrote:
> Hi everyone
> Im new to list and this question may be out of place. This is my first
> post. Im new to freebsd and trying to understand how to create a jail from
> some system calls. I followed the jail subsystem description from the
> handbook and im having a problem or may be using the call incorrectly. But
> here is what im trying to do.
> int main()
> {
> struct in_addr ipaddr;
> struct jail myjail;
> char path[PATH_MAX];
> realpath("/tmp", path);
> myjail.version = 1;
> myjail.path = path;
> myjail.hostname = "testjail";
> const char *ip;
> ip = "192.168.1.142";
> inet_aton(ip, &ipaddr);
> myjail.ip4 = ntohl(ipaddr.s_addr); // I get and error here, invalid
> conversion from _uint32_t' to in_addr*
> myjail.ip4 = ipaddr.s_addr; // and and error here, invlid
> conversion from in_addr_t to in_addr*
> }
> I know that there is more that needs to be done but this just a test stub
> as im trying to work thru the calls and understand whats going on.
> Any would be appreciated thanks.
> Take a look at the jail(2) man page:
> The ``ip4s'' and ``ip6s'' give the numbers of IPv4 and IPv6 addresses
> that will be passed via their respective pointers.
> The ``ip4'' and ``ip6'' pointers can be set to an arrays of IPv4 and IPv6
> addresses to be assigned to the prison, or NULL if none. IPv4 addresses
> must be in network byte order.
> So you'd do something like the following:
> myjail.ip4s = 1;
> inet_aton(ip, &ipaddr);
> myjail.ip4 = &ipaddr;
> You don't have to switch byte order.
> and in that case of 7.2-R or later multi-IP jails the version should
> not be 1 either.
> I fixed tools/regressions/priv the other day; maybe this helps a bit
> as well:
> http://svn.freebsd.org/viewvc/base/head/tools/regression/priv/main.c?r1=173679&r2=196172
> /bz
> --
> Bjoern A. Zeeb What was I talking about and who are you again?
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