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Always NULL check ifaddrs->ifa_addr #415

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Always NULL check ifaddrs->ifa_addr #415

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12 changes: 8 additions & 4 deletions base/networking.c
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Original file line number Diff line number Diff line change
Expand Up @@ -89,15 +89,17 @@ gvm_source_iface_init (const char *iface)
{
if (ifa->ifa_addr && strcmp (iface, ifa->ifa_name) == 0)
{
if (ifa->ifa_addr->sa_family == AF_INET)
if (ifa->ifa_addr
&& (ifa->ifa_addr->sa_family == AF_INET))
{
struct in_addr *addr =
&((struct sockaddr_in *) ifa->ifa_addr)->sin_addr;

memcpy (&global_source_addr, addr, sizeof (global_source_addr));
ret = 0;
}
else if (ifa->ifa_addr->sa_family == AF_INET6)
else if (ifa->ifa_addr
&& (ifa->ifa_addr->sa_family == AF_INET6))
{
struct sockaddr_in6 *addr;

Expand Down Expand Up @@ -1031,7 +1033,8 @@ gvm_routethrough (struct sockaddr_storage *storage_dest,

for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next)
{
if ((ifa->ifa_addr->sa_family == AF_INET)
if (ifa->ifa_addr
&& (ifa->ifa_addr->sa_family == AF_INET)
&& (ifa->ifa_flags & (IFF_LOOPBACK)))
{
interface_out = g_strdup (ifa->ifa_name);
Expand Down Expand Up @@ -1079,7 +1082,8 @@ gvm_routethrough (struct sockaddr_storage *storage_dest,
{
for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next)
{
if ((ifa->ifa_addr->sa_family == AF_INET)
if (ifa->ifa_addr
&& (ifa->ifa_addr->sa_family == AF_INET)
&& (g_strcmp0 (interface_out, ifa->ifa_name)
== 0))
{
Expand Down