diff options
Diffstat (limited to 'source3/lib')
| -rw-r--r-- | source3/lib/interface.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/source3/lib/interface.c b/source3/lib/interface.c index 7aae803abf..8cc5cfb0b1 100644 --- a/source3/lib/interface.c +++ b/source3/lib/interface.c @@ -350,6 +350,28 @@ static struct interface *iface_find(struct in_addr ip) return NULL; } + +/**************************************************************************** +this function provides a simple hash of the configured interfaces. It is +used to detect a change in interfaces to tell us whether to discard +the current wins.dat file. +Note that the result is independent of the order of the interfaces + **************************************************************************/ +unsigned iface_hash(void) +{ + unsigned ret = 0; + struct interface *i; + + for (i=local_interfaces;i;i=i->next) { + unsigned x1 = (unsigned)str_checksum(inet_ntoa(i->ip)); + unsigned x2 = (unsigned)str_checksum(inet_ntoa(i->nmask)); + ret ^= (x1 ^ x2); + } + + return ret; +} + + /* these 3 functions return the ip/bcast/nmask for the interface most appropriate for the given ip address. If they can't find an appropriate interface they return the requested field of the |