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| author | Hans Dedecker <dedeckeh@gmail.com> | 2017-07-03 16:39:21 +0200 |
|---|---|---|
| committer | Hans Dedecker <dedeckeh@gmail.com> | 2017-09-13 15:32:07 +0200 |
| commit | a827fcad451996f1a7043b479d8c6162174b2038 (patch) | |
| tree | efe79b7edb75c9e9b6b33d5da1125ca7d300c9ae | |
| parent | bea088b6afe84d06552880778dc791cad97d4aec (diff) | |
dhcpv4: avoid segfault when there's no IPv4 prefix
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
| -rw-r--r-- | src/dhcpv4.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/src/dhcpv4.c b/src/dhcpv4.c index c7ac058..b0a4603 100644 --- a/src/dhcpv4.c +++ b/src/dhcpv4.c @@ -95,7 +95,8 @@ int setup_dhcpv4_interface(struct interface *iface, bool enable) return -1; } - uint32_t mask = iface->addr4[0].prefix ? htonl(~((1 << (32 - iface->addr4[0].prefix)) - 1)) : 0; + uint32_t mask = iface->addr4 && iface->addr4[0].prefix ? + htonl(~((1 << (32 - iface->addr4[0].prefix)) - 1)) : 0xffffffff; /* Create a range if not specified */ if (!(iface->dhcpv4_start.s_addr & htonl(0xffff0000)) && |