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C program : how to list interfaces with a valid IP ?

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# 8  
Old 01-16-2008
Quote:
Originally Posted by brolon
Nice function ! That works but I have a problem with the assignment "ifcur = iflist" : error: incompatible types in assignment ?! I don't understand why.

Code:
	
...
struct ifaddrs*		iflist 
,		        ifcur ;
	
if (getifaddrs (&iflist) < 0)
	printf ("* Erreur getifaddrs ! \n") ;

ifcur = iflist ;
	
freeifaddrs(iflist);
...

Your declaration of struct ifaddrs* might be throwing off the compiler when it comes to a struct ifaddrs object and a pointer to that type. The argument to getifaddrs is a pointer to pointer to struct ifaddrs so use &ifcur instead of &iflist and since freeifaddrs takes a unilevel pointer use ifcur.

Code:
...
struct ifaddrs iflist, *ifcur
ifcur = &iflist;

if (getifaddrs (&ifcur) < 0)
	printf ("* Erreur getifaddrs ! \n") ;
	
freeifaddrs(ifcur);
...
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