September 2005 - Macnetworkprog

Re: Newbie: where to start
by Scott Ribe 24 Sep '05

24 Sep '05

site_archiver(a)lists.apple.com Delivered-To: Macnetworkprog(a)lists.apple.com Thread-index: AcXBTJKI0PtmZS0/EdqASAANk1jywA== Thread-topic: Newbie: where to start User-agent: Microsoft-Entourage/11.2.0.050811 > The best place to start is the books by W. Richard Stevens, "Unix > Network Programming". Best overview/introduction. I would also recommend "More Effective TCP/IP" as it concentrates on some important common issues. -- Scott Ribe scott_ribe(a)killerbytes.com http://www.killerbytes.com/ (303) 665-7007 voice _______________________________________________ Do not post admin requests to the list. They will be ignored. Macnetworkprog mailing list (Macnetworkprog(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/macnetworkprog/site_archiver%40lists… This email sent to site_archiver(a)lists.apple.com

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Re: Newbie: where to start
by Justin C. Walker 24 Sep '05

24 Sep '05

site_archiver(a)lists.apple.com Delivered-To: Macnetworkprog(a)lists.apple.com On Sep 23, 2005, at 17:42 , Mark Dawson wrote: Bonjour will only let you discover registered systems (AFAIK). Hope this helps. Regards, Justin -- Justin C. Walker, Curmudgeon-At-Large Institute for General Semantics -------- Experience is what you get when you don't get what you want. -------- _______________________________________________ Do not post admin requests to the list. They will be ignored. Macnetworkprog mailing list (Macnetworkprog(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/macnetworkprog/site_archiver%40lists… I'm new to networking (did a little Open Transport many years back), and would like to create a simple app--a diagnostic that finds all the nodes on my local network, plus some remote (such as www.apple.com and www.google.com) The app would then "ping" those addresses on command--just a quick way to verify whether I've lost my DSL connection or something internal to my network. I found the "simplePing" program that works to ping hosts (and figures out what the IP address is of "www.apple.com"). However, I wasn't sure how to figure out the local network addresses. I wasn't sure if Bonjour was the way to go. Any ideas? It's not easy to discover all "local" addresses without some administrative help (typing them in). One idea, often frowned on by network admins, is local broadcast pings (e.g., if your network is 192.168.21/8, then ping 192.168.21.255). It is unreliable for several reasons (systems may not respond; systems may not receive the ping,; ...). I'd also like some pointers on where to look to learn more about Mac (or general) networking--I'm not sure where a starting point is. I know I need to understand better sockets, but I'm sure there's more :) I picked my "network" ping app more because I could find it useful (maybe there already is something like that?) but more importantly, I thought it would be a good introduction into networking… The best place to start is the books by W. Richard Stevens, "Unix Network Programming". Vol. 1 of the 2nd edition has an excellent treatment of the subject. It's a bit dated, but still valuable. There is a 3rd edition of this book, written by others (Stevens died several years ago). It has more recent content, has received high marks from others, but I have not read it. In addition, Stevens' website (<http://www.kohala.com>) has tarballs of code for networking and other aspects of Unix programming. His code is worth looking at, as examples of how to implement various functions. This email sent to site_archiver(a)lists.apple.com

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Re: Newbie: where to start
by Dalton Hamilton 24 Sep '05

24 Sep '05

site_archiver(a)lists.apple.com Delivered-To: Macnetworkprog(a)lists.apple.com Anyway, good luck and if you need any help, send me an email. Dalton Hamilton On Sep 24, 2005, at 2:42 AM, Mark Dawson wrote: Thanks! This email sent to dalton_hamilton(a)mac.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Macnetworkprog mailing list (Macnetworkprog(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/macnetworkprog/site_archiver%40lists… Hi Mark - I wanted to lear Cocoa development and also needed the same type of tool. I decided to write a tool and wrote NetCheck as my first application. ( http://scriptsoftware.com/netcheck ). I had never done any GUI API development but a lot of client/server socket and unix systems programming. I had always wanted to tie together a GUI to app with some client/server socket code. I wrote NetCheck using BSD Socket API and did not try to learn the CFSocket API. NetCheck was the first CoCoa app I had written. As for your question, is your approach to write a network "scanner" or test a table (or some kind of list) of IP addresses that you've deemed to be important or that test network up-time. Determining what your local subnet is and then composing a layer-3 ICMP broadcast packet is not a very network friendly thing to do on a shared network and doesn't provide any functionality in regards to UP/DOWN time of individual IPs. In my opinion, you should build the App such that you enter IP addresses you want to check and then send the ICMP packets to them. Therefore, I don't think bonjour should play a role in an application that test the up/down state of IP devices or a wan/ dsl link. I'm new to networking (did a little Open Transport many years back), and would like to create a simple app--a diagnostic that finds all the nodes on my local network, plus some remote (such as www.apple.com and www.google.com) The app would then "ping" those addresses on command--just a quick way to verify whether I've lost my DSL connection or something internal to my network. I found the "simplePing" program that works to ping hosts (and figures out what the IP address is of "www.apple.com"). However, I wasn't sure how to figure out the local network addresses. I wasn't sure if Bonjour was the way to go. Any ideas? I'd also like some pointers on where to look to learn more about Mac (or general) networking--I'm not sure where a starting point is. I know I need to understand better sockets, but I'm sure there's more :) I picked my "network" ping app more because I could find it useful (maybe there already is something like that?) but more importantly, I thought it would be a good introduction into networking… Mark _______________________________________________ Do not post admin requests to the list. They will be ignored. Macnetworkprog mailing list (Macnetworkprog(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/macnetworkprog/ dalton_hamilton%40mac.com This email sent to site_archiver(a)lists.apple.com

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Newbie: where to start
by Mark Dawson 24 Sep '05

24 Sep '05

site_archiver(a)lists.apple.com Delivered-To: Macnetworkprog(a)lists.apple.com Thanks! Mark _______________________________________________ Do not post admin requests to the list. They will be ignored. Macnetworkprog mailing list (Macnetworkprog(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/macnetworkprog/site_archiver%40lists… I'm new to networking (did a little Open Transport many years back), and would like to create a simple app--a diagnostic that finds all the nodes on my local network, plus some remote (such as www.apple.com and www.google.com) The app would then "ping" those addresses on command--just a quick way to verify whether I've lost my DSL connection or something internal to my network. I found the "simplePing" program that works to ping hosts (and figures out what the IP address is of "www.apple.com"). However, I wasn't sure how to figure out the local network addresses. I wasn't sure if Bonjour was the way to go. Any ideas? I'd also like some pointers on where to look to learn more about Mac (or general) networking--I'm not sure where a starting point is. I know I need to understand better sockets, but I'm sure there's more :) I picked my "network" ping app more because I could find it useful (maybe there already is something like that?) but more importantly, I thought it would be a good introduction into networking… This email sent to site_archiver(a)lists.apple.com

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Re: Delaying with APC
by Becky Willrich 23 Sep '05

23 Sep '05

site_archiver(a)lists.apple.com Delivered-To: macnetworkprog(a)lists.apple.com REW On Sep 23, 2005, at 10:19 AM, Jeremy Wyld wrote: jeremy On Sep 23, 2005, at 8:21 AM, Mark Thomas wrote: Thanks in advance, Mark. I don't think so (CFSocket is not something i've used very much but it's really just a tiny wrapper around a socket, just enough to integrate a socket into a CFRunLoop_ , cfnetwork will IIRC (although CFSocket can probably handle socks proxies) On 9/14/05, Mark Thomas <maillists(a)coderus.com> wrote: But CFSocket will is that what you mean ? Thanks Mark. Fred On 9/13/05, Mark Thomas <maillists(a)coderus.com> wrote: Any body known the answer's - Quinn maybe ? Thanks Mark. Fred Mark. On 9 Sep 2005, at 19:16, Mark Thomas wrote: One way to do this is to use CFNetwork. Fred This email sent to frederick.cheung(a)gmail.com This email sent to jwyld(a)apple.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Macnetworkprog mailing list (Macnetworkprog(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/macnetworkprog/rew%40apple.com This email sent to rew(a)apple.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Macnetworkprog mailing list (Macnetworkprog(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/macnetworkprog/site_archiver%40lists… Although if you simply want to open a (TCP) connection to some remote host, CFSocketStream will help; you can grab the proxy settings from System Configuration and apply them to the socket stream, and CFSocketStream will take care of connecting via the proxy. CFSocket does nothing with proxies. You need to get the settings and perform all the proxy protocol work. CFSocket is simply a convenience wrapper on top of sockets. Hi, I have been out on vacation so sorry for re-bring this up. But I was wondering if any of Apple developers would be able to answer whether using CFSocket would be able to work with proxy settings ?, as presently it seems unknown. Open Transport won't do anything for you proxywise. You're basically working at the same level as sockets, but using a legacy library. Hi, Interrupting the the .pac file, would see a bit of OT, so if I used CFNetwork would these deal with any proxy settings for me automatically. Hmmm, makes me wonder if the Open Transport API's would work here as maybe they are build on that and they would work if CFNetwork did. I'm guessing then working with socket's while good for cross platform portability is not good for anything which is built on top of them. Would prefer to keep to BSD socket's or going to have to have a bit of major write to go that way, but not impossible. You can use systemconfiguration (SCDynamicStoreCopyProxies) get the proxy settings and interpret them yourself. Hi, I have some code which test's it connection by using a socket and connecting directly on the server port 80, to check that the server is there, which works great. But if your system is setup on a cooperate network for example and there is a web proxy in the way, and so you system is setup using APC for web browsing. The above test technique doesn't way as the proxy is in the way. So anybody know how to work with the proxy to do this ?, I'm guessing browsers manage it some how and detect this ? _______________________________________________ Do not post admin requests to the list. They will be ignored. Macnetworkprog mailing list (Macnetworkprog(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/macnetworkprog/ frederick.cheung%40gm ai l.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Macnetworkprog mailing list (Macnetworkprog(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/macnetworkprog/jwyld% 40apple.com This email sent to site_archiver(a)lists.apple.com

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Re: Delaying with APC
by Jeremy Wyld 23 Sep '05

23 Sep '05

site_archiver(a)lists.apple.com Delivered-To: macnetworkprog(a)lists.apple.com jeremy On Sep 23, 2005, at 8:21 AM, Mark Thomas wrote: Thanks in advance, Mark. I don't think so (CFSocket is not something i've used very much but it's really just a tiny wrapper around a socket, just enough to integrate a socket into a CFRunLoop_ , cfnetwork will IIRC (although CFSocket can probably handle socks proxies) On 9/14/05, Mark Thomas <maillists(a)coderus.com> wrote: But CFSocket will is that what you mean ? Thanks Mark. Fred On 9/13/05, Mark Thomas <maillists(a)coderus.com> wrote: Any body known the answer's - Quinn maybe ? Thanks Mark. Fred Mark. On 9 Sep 2005, at 19:16, Mark Thomas wrote: So anybody know how to work with the proxy to do this ?, I'm guessing browsers manage it some how and detect this ? One way to do this is to use CFNetwork. Fred This email sent to frederick.cheung(a)gmail.com This email sent to jwyld(a)apple.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Macnetworkprog mailing list (Macnetworkprog(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/macnetworkprog/site_archiver%40lists… CFSocket does nothing with proxies. You need to get the settings and perform all the proxy protocol work. CFSocket is simply a convenience wrapper on top of sockets. Hi, I have been out on vacation so sorry for re-bring this up. But I was wondering if any of Apple developers would be able to answer whether using CFSocket would be able to work with proxy settings ?, as presently it seems unknown. Open Transport won't do anything for you proxywise. You're basically working at the same level as sockets, but using a legacy library. Hi, Interrupting the the .pac file, would see a bit of OT, so if I used CFNetwork would these deal with any proxy settings for me automatically. Hmmm, makes me wonder if the Open Transport API's would work here as maybe they are build on that and they would work if CFNetwork did. I'm guessing then working with socket's while good for cross platform portability is not good for anything which is built on top of them. Would prefer to keep to BSD socket's or going to have to have a bit of major write to go that way, but not impossible. You can use systemconfiguration (SCDynamicStoreCopyProxies) get the proxy settings and interpret them yourself. Hi, I have some code which test's it connection by using a socket and connecting directly on the server port 80, to check that the server is there, which works great. But if your system is setup on a cooperate network for example and there is a web proxy in the way, and so you system is setup using APC for web browsing. The above test technique doesn't way as the proxy is in the way. _______________________________________________ Do not post admin requests to the list. They will be ignored. Macnetworkprog mailing list (Macnetworkprog(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/macnetworkprog/ frederick.cheung%40gm ai l.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Macnetworkprog mailing list (Macnetworkprog(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/macnetworkprog/jwyld% 40apple.com This email sent to site_archiver(a)lists.apple.com

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Re: Delaying with APC
by Mark Thomas 23 Sep '05

23 Sep '05

site_archiver(a)lists.apple.com Delivered-To: macnetworkprog(a)lists.apple.com Organization: Coderus Ltd User-agent: Microsoft-Entourage/10.1.0.2006 Hi, I have been out on vacation so sorry for re-bring this up. But I was wondering if any of Apple developers would be able to answer whether using CFSocket would be able to work with proxy settings ?, as presently it seems unknown. Thanks in advance, Mark. > I don't think so (CFSocket is not something i've used very much but > it's really just a tiny wrapper around a socket, just enough to > integrate a socket into a CFRunLoop_ , cfnetwork will IIRC (although > CFSocket can probably handle socks proxies) > > On 9/14/05, Mark Thomas <maillists(a)coderus.com> wrote: >> But CFSocket will is that what you mean ? >> >> Thanks >> Mark. >> >>> Open Transport won't do anything for you proxywise. You're basically >>> working at the same level as sockets, but using a legacy library. >>> >>> Fred >>> >>> On 9/13/05, Mark Thomas <maillists(a)coderus.com> wrote: >>>> Hi, >>>> Interrupting the the .pac file, would see a bit of OT, so if I used >>>> CFNetwork would these deal with any proxy settings for me automatically. >>>> >>>> Hmmm, makes me wonder if the Open Transport API's would work here as >>>> maybe they are build on that and they would work if CFNetwork did. >>>> >>>> I'm guessing then working with socket's while good for cross platform >>>> portability is not good for anything which is built on top of them. >>>> >>>> Any body known the answer's - Quinn maybe ? >>>> >>>> Thanks >>>> Mark. >>>> >>>>>> Would prefer to keep to BSD socket's or going to have to have a bit >>>>>> of major >>>>>> write to go that way, but not impossible. >>>>>> >>>>> >>>>> You can use systemconfiguration (SCDynamicStoreCopyProxies) get the >>>>> proxy settings and interpret them yourself. >>>>> >>>>> Fred >>>>>> Mark. >>>>>> >>>>>> >>>>>>> >>>>>>> On 9 Sep 2005, at 19:16, Mark Thomas wrote: >>>>>>> >>>>>>> >>>>>>>> Hi, >>>>>>>> I have some code which test's it connection by using a socket and >>>>>>>> connecting directly on the server port 80, to check that the >>>>>>>> server is >>>>>>>> there, which works great. >>>>>>>> >>>>>>>> But if your system is setup on a cooperate network for example >>>>>>>> and there >>>>>>>> is a web proxy in the way, and so you system is setup using APC for >>>>>>>> web >>>>>>>> browsing. The above test technique doesn't way as the proxy is in >>>>>>>> the way. >>>>>>>> >>>>>>>> So anybody know how to work with the proxy to do this ?, I'm >>>>>>>> guessing >>>>>>>> browsers manage it some how and detect this ? >>>>>>>> >>>>>>> >>>>>>> One way to do this is to use CFNetwork. >>>>>>> >>>>>>> Fred >>>>>>> >>>>>>> >>>>>>> >>>>>> >>>>>> >>>>> >>>>> >>>>> >>>> >>>> _______________________________________________ >>>> Do not post admin requests to the list. They will be ignored. >>>> Macnetworkprog mailing list (Macnetworkprog(a)lists.apple.com) >>>> Help/Unsubscribe/Update your Subscription: >>>> http://lists.apple.com/mailman/options/macnetworkprog/frederick.cheung%40gm >>>> ai >>>> l.com >>>> >>>> This email sent to frederick.cheung(a)gmail.com >>>> >>> >>> >> >> > > _______________________________________________ Do not post admin requests to the list. They will be ignored. Macnetworkprog mailing list (Macnetworkprog(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/macnetworkprog/site_archiver%40lists… This email sent to site_archiver(a)lists.apple.com

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Re: Getting Local IP Address in MacOS X
by Jeremy Wyld 20 Sep '05

20 Sep '05

site_archiver(a)lists.apple.com Delivered-To: macnetworkprog(a)lists.apple.com This is pretty good except it should handle AF_INET6 as well as AF_INET. jeremy On Sep 19, 2005, at 4:55 PM, Rich Siegel wrote: On 9/17/05 at 12:19 PM, Ryan McGann <rmcgann(a)mac.com> wrote: This question is asked quite frequently on this list. In summary here are the replies: Ahoy Mates[1], Here for your delectation is the code. Any suggestions for improvement will be gratefully considered. == 8< 8< 8< 8< 8< 8< == #include <arpa/inet.h> [3] StCFAutoRelease<CFDataRef> socketHandle; == >8 >8 >8 >8 >8 >8 == [1] <http://www.talklikeapirate.com/piratehome.html> [2] Yes, I know, CFNetwork offers an FTP implementation. :-) [4] The semantics of the various FailXXX() calls should be obvious from context. [5] kPOSIXErrorBase is a constant which is added to 'errno' to map into a range of application-specific error messages. Hope this is useful, R. (on this day, pronounced "Arrrrrr.") This email sent to jwyld(a)apple.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Macnetworkprog mailing list (Macnetworkprog(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/macnetworkprog/site_archiver%40lists… There's been a lot of good advice about regarding the various techniques for discovering all of the network interfaces and their (possibly multihomed) IP addresses. One subject I haven't seen addressed, however, is how to discover the IP address of the local end of an open communications channel. This is useful in the case when you need to identify yourself to the remote server at the protocol level (for example, when beginning an FTP transfer[2] or SMTP handshake). socketHandle.Assign((CFDataRef)CFReadStreamCopyProperty (fReadStream, kCFStreamPropertySocketNativeHandle)); [4] FailNIL(socketHandle, coreFoundationUnknownErr); int socket = *reinterpret_cast<const int*> (CFDataGetBytePtr(socketHandle)); char addrBuffer[SOCK_MAXADDRLEN]; memset(addrBuffer, 0, sizeof(addrBuffer)); socklen_t addrLen = sizeof(addrBuffer); sockaddr *addr = reinterpret_cast<sockaddr*>(addrBuffer); sockaddr_in *in_addr = reinterpret_cast<sockaddr_in*>(addrBuffer); [5] FailTest(0 == getsockname(socket, addr, &addrLen), kPOSIXErrorBase + errno); FailTest(AF_INET == addr->sa_family, coreFoundationUnknownErr); FailNIL(inet_ntop(addr->sa_family, &in_addr->sin_addr, buffer, bufferSize), kPOSIXErrorBase + errno); [3] The "StCFAutoRelease" template class is a wrapper which maintains retain/release for any CFTypeRef in an exception-safe way. The Assign() method used here will capture the CFTypeRef without adding a reference to it, so that it is properly released when the StAutoRelease instance goes out of scope. -- Rich Siegel Bare Bones Software, Inc. <siegel(a)barebones.com> <http:// www.barebones.com/> Someday I'll look back on all this and laugh... until they sedate me. _______________________________________________ Do not post admin requests to the list. They will be ignored. Macnetworkprog mailing list (Macnetworkprog(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/macnetworkprog/jwyld% 40apple.com This email sent to site_archiver(a)lists.apple.com

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Re: Getting Local IP Address in MacOS X
by Rich Siegel 19 Sep '05

19 Sep '05

site_archiver(a)lists.apple.com Delivered-To: macnetworkprog(a)lists.apple.com On 9/17/05 at 12:19 PM, Ryan McGann <rmcgann(a)mac.com> wrote: > This question is asked quite frequently on this list. In summary here > are the replies: Ahoy Mates[1], There's been a lot of good advice about regarding the various techniques for discovering all of the network interfaces and their (possibly multihomed) IP addresses. One subject I haven't seen addressed, however, is how to discover the IP address of the local end of an open communications channel. This is useful in the case when you need to identify yourself to the remote server at the protocol level (for example, when beginning an FTP transfer[2] or SMTP handshake). Here for your delectation is the code. Any suggestions for improvement will be gratefully considered. == 8< 8< 8< 8< 8< 8< == #include <arpa/inet.h> [3] StCFAutoRelease<CFDataRef> socketHandle; socketHandle.Assign((CFDataRef)CFReadStreamCopyProperty(fReadStream, kCFStreamPropertySocketNativeHandle)); [4] FailNIL(socketHandle, coreFoundationUnknownErr); int socket = *reinterpret_cast<const int*>(CFDataGetBytePtr(socketHandle)); char addrBuffer[SOCK_MAXADDRLEN]; memset(addrBuffer, 0, sizeof(addrBuffer)); socklen_t addrLen = sizeof(addrBuffer); sockaddr *addr = reinterpret_cast<sockaddr*>(addrBuffer); sockaddr_in *in_addr = reinterpret_cast<sockaddr_in*>(addrBuffer); [5] FailTest(0 == getsockname(socket, addr, &addrLen), kPOSIXErrorBase + errno); FailTest(AF_INET == addr->sa_family, coreFoundationUnknownErr); FailNIL(inet_ntop(addr->sa_family, &in_addr->sin_addr, buffer, bufferSize), kPOSIXErrorBase + errno); == >8 >8 >8 >8 >8 >8 == [1] <http://www.talklikeapirate.com/piratehome.html> [2] Yes, I know, CFNetwork offers an FTP implementation. :-) [3] The "StCFAutoRelease" template class is a wrapper which maintains retain/release for any CFTypeRef in an exception-safe way. The Assign() method used here will capture the CFTypeRef without adding a reference to it, so that it is properly released when the StAutoRelease instance goes out of scope. [4] The semantics of the various FailXXX() calls should be obvious from context. [5] kPOSIXErrorBase is a constant which is added to 'errno' to map into a range of application-specific error messages. Hope this is useful, R. (on this day, pronounced "Arrrrrr.") -- Rich Siegel Bare Bones Software, Inc. <siegel(a)barebones.com> <http://www.barebones.com/> Someday I'll look back on all this and laugh... until they sedate me. _______________________________________________ Do not post admin requests to the list. They will be ignored. Macnetworkprog mailing list (Macnetworkprog(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/macnetworkprog/site_archiver%40lists… This email sent to site_archiver(a)lists.apple.com

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Re: CFSocket Help
by Gerry Beggs 19 Sep '05

19 Sep '05

site_archiver(a)lists.apple.com Delivered-To: macnetworkprog(a)lists.apple.com That's great. Thanks a lot to you and Quinn. I've got my news client connected and reading messages now. Any further help would be greatly appreciated. Thanks again. On 19-Sep-05, at 7:47 AM, sunil prajapati wrote: Hi Here i am giving the source code sever and client using has been created using CFSocket -- gbeggs1(a)mts.net http://www.mts.net/~gbeggs1/ _______________________________________________ Do not post admin requests to the list. They will be ignored. Macnetworkprog mailing list (Macnetworkprog(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/macnetworkprog/site_archiver%40lists… Now I'm having a problem when I want to disconnect the socket and free its resources. I thought CFSocketInvalidate was what I should use to disconnect the socket, but my program is freezing at that point. This email sent to site_archiver(a)lists.apple.com

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