Finding Current ipaddress, Netmask and Gateway

For finding the ipaddress, there is the simple function gethostid(), but there don't appear to be similar functions for the netmask or gateway (router). By combing through the related libraries I found the following "solutions":

netmask: _if_tab[0].mask

router: ath = router_for_iface(0, NULL, NULL, IF_ANY);
arpcache_ipaddr(ath, &router);

Since I do not fully understand the above, I do not know how reliable they are.

Is there a better way to find these two parameters?

I am using DC 10.66 on an RCM4310.

Regards,

Steve

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On 11/2/2011 12:53 PM, Steve wrote:
> For finding the ipaddress, there is the simple function gethostid(), but there don't appear to be similar functions for the netmask or gateway (router). By combing through the related libraries I found the following "solutions":
>
> netmask: _if_tab[0].mask
>
> router: ath = router_for_iface(0, NULL, NULL, IF_ANY);
> arpcache_ipaddr(ath, &router);
>
> Since I do not fully understand the above, I do not know how reliable they are.
>
> Is there a better way to find these two parameters?
>
> I am using DC 10.66 on an RCM4310.

The ifconfig() has defines for both set and read of parameters.
If I remember right:

IFS_NETMASK - Pass long mask
IFG_NETMASK - pass long pointer to receive parameter.

IFS_* set parameter
IFG_* get parameter.

look at the net.lib defines and you can see what is available.

--
------
Scott G. Henion, Consultant
Web site: http://SHDesigns.org
------

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To get the Net Mask:
 
ifconfig( IF_DEFAULT, IFS_NETMASK, &long_value, IFS_END );
 
inet_ntoa( net_mask_str, long_value ); // Convert long to dotted string: "255.255.255.0"
 
To get the router/gatway IP:
 
ifconfig( IF_ETH0, IFG_ROUTER_DEFAULT, &long_value, IFS_END );
 inet_ntoa( router_ip_str, long_value ); // Convert long to dotted string: "192.168.0.10"
 
>________________________________
>From: Steve
>To: r...
>Sent: Wednesday, November 2, 2011 9:53 AM
>Subject: [rabbit-semi] Finding Current ipaddress, Netmask and Gateway
> 
>For finding the ipaddress, there is the simple function gethostid(), but there don't appear to be similar functions for the netmask or gateway (router). By combing through the related libraries I found the following "solutions":
>
>netmask: _if_tab[0].mask
>
>router: ath = router_for_iface(0, NULL, NULL, IF_ANY);
>arpcache_ipaddr(ath, &router);
>
>Since I do not fully understand the above, I do not know how reliable they are.
>
>Is there a better way to find these two parameters?
>
>I am using DC 10.66 on an RCM4310.
>
>Regards,
>
>Steve
> Start a New Thread

Steve,

Thanks.

Steve

--- In r..., Steve Trigero wrote:
>
> To get the Net Mask:
>  
> ifconfig( IF_DEFAULT, IFS_NETMASK, &long_value, IFS_END );
>  
> inet_ntoa( net_mask_str, long_value ); // Convert long to dotted string: "255.255.255.0"
>  
> To get the router/gatway IP:
>  
> ifconfig( IF_ETH0, IFG_ROUTER_DEFAULT, &long_value, IFS_END );
>  inet_ntoa( router_ip_str, long_value ); // Convert long to dotted string: "192.168.0.10"
>  
>
>
> >________________________________
> >From: Steve
> >To: r...
> >Sent: Wednesday, November 2, 2011 9:53 AM
> >Subject: [rabbit-semi] Finding Current ipaddress, Netmask and Gateway
> >
> >
> > 
> >For finding the ipaddress, there is the simple function gethostid(), but there don't appear to be similar functions for the netmask or gateway (router). By combing through the related libraries I found the following "solutions":
> >
> >netmask: _if_tab[0].mask
> >
> >router: ath = router_for_iface(0, NULL, NULL, IF_ANY);
> >arpcache_ipaddr(ath, &router);
> >
> >Since I do not fully understand the above, I do not know how reliable they are.
> >
> >Is there a better way to find these two parameters?
> >
> >I am using DC 10.66 on an RCM4310.
> >
> >Regards,
> >
> >Steve
> >
> >
> >
> >
>

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Thanks Scott.

Steve

--- In r..., Scott Henion wrote:
>
> On 11/2/2011 12:53 PM, Steve wrote:
> > For finding the ipaddress, there is the simple function gethostid(), but there don't appear to be similar functions for the netmask or gateway (router). By combing through the related libraries I found the following "solutions":
> >
> > netmask: _if_tab[0].mask
> >
> > router: ath = router_for_iface(0, NULL, NULL, IF_ANY);
> > arpcache_ipaddr(ath, &router);
> >
> > Since I do not fully understand the above, I do not know how reliable they are.
> >
> > Is there a better way to find these two parameters?
> >
> > I am using DC 10.66 on an RCM4310.
>
> The ifconfig() has defines for both set and read of parameters.
> If I remember right:
>
> IFS_NETMASK - Pass long mask
> IFG_NETMASK - pass long pointer to receive parameter.
>
> IFS_* set parameter
> IFG_* get parameter.
>
> look at the net.lib defines and you can see what is available.
>
> --
> ------
> Scott G. Henion, Consultant
> Web site: http://SHDesigns.org
> ------
>

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