Hi,

I don't understand why my loop crashes,

Here is my grovel definition for ifaddrs struct:

(cstruct ifaddrs "struct ifaddrs"
         (next "ifa_next" :type :pointer)
         (name "ifa_name" :type :string)
         (flags "ifa_flags" :type :unsigned-int)
         (address "ifa_addr" :type :pointer)
         (netmask "ifa_netmask" :type :pointer)
         (broadcast "ifa_broadaddr" :type :pointer)
         (point-to-point-destination "ifa_dstaddr" :type :pointer)
         (data "ifa_data" :type :pointer))

Here is my loop, i was expecting next to be a null pointer after the first vmnet8

CL-USER>  (cffi:with-foreign-object (p :pointer)                                                                                                            
           (getifaddrs p)                                                                                                                          
           (do ()                                                                                                                                           
               ((cffi:null-pointer-p p))                                                                                                                    
             (format t "Interface: ~a~%" (cffi:foreign-slot-value (cffi:mem-ref p :pointer) 'ifaddrs 'name))                                                
             (setf p (cffi:foreign-slot-value p 'ifaddrs 'next))))
Interface: lo                                                                                                                                               
Interface: sit0                                                                                                                                             
Interface: eth0                                                                                                                                             
Interface: wlan0                                                                                                                                            
Interface: vmnet1                                                                                                                                           
Interface: vmnet8                                                                                                                                           
Interface: lo                                                                                                                                               
Interface: wlan0                                                                                                                                            
Interface: vmnet1                                                                                                                                           
Interface: vmnet8                                                                                                                                           
Interface: lo                                                                                                                                               
Interface: wlan0                                                                                                                                            
Interface: vmnet1                                                                                                                                           
Interface: vmnet8                                                                                                                                           
; Evaluation aborted on #<SB-SYS:MEMORY-FAULT-ERROR {BF604E1}>.
       
Regards,
Jose