xcode - How to check if any network available in OS X app? -

this question has answer here:

• how determine internet connection in cocoa? 3 answers

in app, wanted check if there type of existing network available in current os x system. ethernet or internet or wifi or 3g-card or other type of network communication.

how can achieve that?

thank you!

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https://stackoverflow.com/questions/5662298...

thank bdash , cody! homework , found answer above. iphone, make modification below.

- (bool)isanynetworkexist {     struct sockaddr_in nulladdress;      bzero(&nulladdress, sizeof(nulladdress));     nulladdress.sin_len = sizeof(nulladdress);     nulladdress.sin_family = af_inet;      scnetworkreachabilityref ref = scnetworkreachabilitycreatewithaddress(kcfallocatordefault, (const struct sockaddr*) &nulladdress);      scnetworkreachabilityflags flags;     scnetworkreachabilitygetflags(ref, &flags);     cfrelease(ref);     /* !!! */      amcdebug(@"flag: 0x%08x", flags);     if (0 != (flags & kscnetworkflagsislocaladdress))     {         return yes;     }     else     {         return no;     } } 

i check "kscnetworkflagsislocaladdress" only, not sure if ok.

i tried flag when remove network connection , returned 0x07.

you should @ scnetworkreachability. in general create reachability object , add run loop , you'll callback when reachable. see this post details.
take @ scnetworkconfiguration: can take walk through interfaces in system , see if of them connected.
, can take @ scdynamicstore. there example in apple mailing list.