BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  How can i get the ip's NetWork Mask          BorlandTalk.com Forum Index -> Delphi Internet Winsock View previous topic :: View next topic   Author Message juan Guest Posted: Thu Sep 21, 2006 11:23 pm    Post subject: How can i get the ip's NetWork Mask Hi all, I need obtain the netmask of the server's ip. How can do that? Thanks. Back to top Remy Lebeau (TeamB) Guest Posted: Thu Sep 21, 2006 11:58 pm    Post subject: Re: How can i get the ip's NetWork Mask "juan" <nosapm (AT) nospam (DOT) com> wrote in message news:4512d971 (AT) newsgroups (DOT) borland.com... Quote: I need obtain the netmask of the server's ip. How can do that? Is your code running on the server machine to begin with? If so, then look at the Win32 API GetAdaptersInfo() function. It can return the IP and Subnet for every network adapter on the machine. Otherwise, there is no way to obtain a mask from an IP alone. Gambit Back to top Angus Johnson Guest Posted: Fri Sep 22, 2006 2:53 pm    Post subject: Re: How can i get the ip's NetWork Mask Quote: Is your code running on the server machine to begin with? If so, then look at the Win32 API GetAdaptersInfo() function. It can return the IP and Subnet for every network adapter on the machine. Otherwise, there is no way to obtain a mask from an IP alone. That's not quite true. You can also get the an adapter's netmask via SNMP The relevant OID is .1.3.6.1.2.1.4.20.1.3 see SnmpExtensionQuery() and related functions (even works on machines which don't support GetAdaptersInfo ). Back to top Remy Lebeau (TeamB) Guest Posted: Fri Sep 22, 2006 10:22 pm    Post subject: Re: How can i get the ip's NetWork Mask "Angus Johnson" <angusj (AT) undisclosed (DOT) loc> wrote in message news:4513b2a6$1 (AT) newsgroups (DOT) borland.com... Quote: That's not quite true. You can also get the an adapter's netmask via SNMP The relevant OID is .1.3.6.1.2.1.4.20.1.3 see SnmpExtensionQuery() and related functions I assume that you are referring to querying a netowkr server, such as a router? Quote: even works on machines which don't support GetAdaptersInfo. All Windows machines going back to Windows 98 support GetAdaptersInfo() Gambit Back to top Angus Johnson Guest Posted: Sat Sep 23, 2006 3:57 am    Post subject: Re: How can i get the ip's NetWork Mask Quote: That's not quite true. You can also get the an adapter's netmask via SNMP The relevant OID is .1.3.6.1.2.1.4.20.1.3 see SnmpExtensionQuery() and related functions I assume that you are referring to querying a netowkr server, such as a router? The beauty of SNMP is you can use it to query both local and remote devices (including routers). My understanding of GetAdaptersInfo is that it only works for the local PC. Quote: even works on machines which don't support GetAdaptersInfo. All Windows machines going back to Windows 98 support GetAdaptersInfo() In my experience the required IpHlpApi.dll isn't as ubiquitous as you're suggesting. WinNT4 machines come to mind as one OS where it isn't found. And from MSDN: GetAdaptersInfo requires Windows Vista, Windows XP, Windows 2000 Professional, Windows Me, or Windows 98. SnmpExtensionQuery and related functions require Requires Windows Vista, Windows XP, Windows 2000 Professional, Windows NT Workstation, Windows Me, Windows 98, or Windows 95. Anyhow, if the OP or others are looking for Delphi SNMP Api functions, they can be downloaded as part of JCL: http://sourceforge.net/projects/jcl/ Back to top Mervin Pearce [SACS] Guest Posted: Fri Sep 29, 2006 1:04 am    Post subject: Re: How can i get the ip's NetWork Mask And if you are in a secured environment, SNMP will be disabled. You can also get the netmask using a return value from a PING request, once again FW may drop this. 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