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Mike Knoblock
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 Posted: Wed Apr 12, 2006 11:03 pm Post subject: How to get the configured subnet mask for this machine? |
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Anyone know how to use WINAPI to retrieve the subnet mask for a given
interface? I can programmatically retrieve a list of IP addresses with
gethostbyname, but this doesn't deal with configured subnets.
What's behind all this is I need an application to send a subnet
broadcast message on startup to find other instances of itself. Running
IPCONFIG from a shell is messy, and I can't find anything on MSDN.
TIA
Mike |
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Mike Knoblock
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| Posted: Thu Apr 13, 2006 1:03 am Post subject: Re: How to get the configured subnet mask for this machine? |
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I looked; I swear!
Thanks!!
JF Jolin wrote:
| Quote: | 12 Apr 2006 14:41:53 -0700, Mike Knoblock <mknoblock (AT) gmail (DOT) com> wrote:
Anyone know how to use WINAPI to retrieve the subnet mask for a given
interface?
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/iphlp/iphlp/getadaptersinfo.asp
I can programmatically retrieve a list of IP addresses with
gethostbyname,
but this doesn't deal with configured subnets.
What's behind all this is I need an application to send a subnet
broadcast message
on startup to find other instances of itself. Running IPCONFIG from a
shell is messy,
and I can't find anything on MSDN.
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JF Jolin
Guest
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| Posted: Thu Apr 13, 2006 1:03 am Post subject: Re: How to get the configured subnet mask for this machine? |
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12 Apr 2006 14:41:53 -0700, Mike Knoblock <mknoblock (AT) gmail (DOT) com> wrote:
| Quote: | Anyone know how to use WINAPI to retrieve the subnet mask for a given interface?
|
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/iphlp/iphlp/getadaptersinfo.asp
| Quote: | I can programmatically retrieve a list of IP addresses with gethostbyname,
but this doesn't deal with configured subnets.
What's behind all this is I need an application to send a subnet broadcast message
on startup to find other instances of itself. Running IPCONFIG from a shell is messy,
and I can't find anything on MSDN.
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--
JF Jolin |
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Remy Lebeau (TeamB)
Guest
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| Posted: Thu Apr 13, 2006 2:03 am Post subject: Re: How to get the configured subnet mask for this machine? |
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"Mike Knoblock" <mknoblock (AT) gmail (DOT) com> wrote in message
news:443d7421$1 (AT) newsgroups (DOT) borland.com...
| Quote: | Anyone know how to use WINAPI to retrieve the subnet mask
for a given interface?
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Look at the GetAdaptersInfo() function in the IPHLR API:
GetAdaptersInfo
http://msdn.microsoft.com/library/en-us/iphlp/iphlp/getadaptersinfo.asp
The IP_ADAPTER_INFO structure has several members that deal with IP
addresses and masks. They are all of type IP_ADDR_STRING, which has an
IpMask member.
| Quote: | I can programmatically retrieve a list of IP addresses with
gethostbyname, but this doesn't deal with configured subnets.
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There is nothing in the WinSock API for what you ask.
Gambit |
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