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Dependents: oldheating gps motorhome heating
Diff: udp/dhcp/dhcp.c
- Revision:
- 174:60e5ab296671
- Parent:
- 160:6a1d1d368f80
- Child:
- 178:52714fef5ca1
--- a/udp/dhcp/dhcp.c Wed Dec 23 09:52:47 2020 +0000
+++ b/udp/dhcp/dhcp.c Wed Dec 23 19:43:09 2020 +0000
@@ -58,8 +58,12 @@
char DhcpHostName [DNS_MAX_LABEL_LENGTH+1];
bool DhcpIpNeedsToBeRouted(uint32_t ip)
-{
- return (ip & DhcpSubnetMask) != (DhcpBroadcastIp & DhcpSubnetMask);
+{
+ if ((ip & 0x000000FF) == 0xFF) return false; //Broadcast 255.xxx.xxx.xxx
+ if ((ip & 0x000000FF) == 0xE0) return false; //Multicast 224.xxx.xxx.xxx
+ if (ip == (DhcpLocalIp | 0xFF000000)) return false; //Local broadcast ip == 192.168.0.255
+
+ return (ip & DhcpSubnetMask) != (DhcpLocalIp & DhcpSubnetMask); //ip != 192.168.0.xxx
}
static uint32_t readOption32(char** pp)