Version: manpages-dev 3.27-1ubuntu2
The example program source produces a Seg-Fault, when a device does not
have an ifa->ifa_addr. (e.g. openvpn-tunnels, probably others (dialup?))
ORIGINAL:
for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
family = ifa->ifa_addr->sa_family;
POSSIBLE FIX:
for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
if (ifa->ifa_addr != NULL)
family = ifa->ifa_addr->sa_family;
else
family = -1;
Also it is not documented, that struct sockaddr *ifa_addr might be NULL.
best wishes and keep up the good work,
Adrian Dabrowski
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