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IP math #3637

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IP math #3637

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dd763d5
Added support for user-supplied DHCP range, with basic sanity checks
NdK73 Sep 1, 2017
2147eeb
Merge branch 'master' into master
NdK73 Sep 20, 2017
3952a4e
Fixed bit-negation
NdK73 Sep 22, 2017
3d9e796
Merge with upstream master
NdK73 Sep 22, 2017
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6 changes: 3 additions & 3 deletions libraries/ESP8266WiFi/src/ESP8266WiFiAP.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -208,10 +208,10 @@ bool ESP8266WiFiAPClass::softAPConfig(IPAddress local_ip, IPAddress gateway, IPA
struct dhcps_lease dhcp_lease;

uint32_t net_addr = info.ip.addr & info.netmask.addr;
uint32_t bcast_addr = net_addr | !info.netmask.addr;
uint32_t bcast_addr = net_addr | ~info.netmask.addr;

// Assign user-supplied range, checking its validity
IPAddress ip = (static_cast<uint32_t>(dhcp_start) & !info.netmask.addr) | net_addr;
IPAddress ip = (static_cast<uint32_t>(dhcp_start) & ~info.netmask.addr) | net_addr;

dhcp_lease.start_ip.addr = ip;
if(ip != net_addr && ip != bcast_addr && ip != info.ip.addr && ip != info.gw.addr) {
Expand All @@ -220,7 +220,7 @@ bool ESP8266WiFiAPClass::softAPConfig(IPAddress local_ip, IPAddress gateway, IPA
dhcp_lease.start_ip.addr=0;
}

ip = (static_cast<uint32_t>(dhcp_end) & !info.netmask.addr) | net_addr;
ip = (static_cast<uint32_t>(dhcp_end) & ~info.netmask.addr) | net_addr;
dhcp_lease.end_ip.addr = static_cast<uint32_t>(ip);
if(ip != net_addr && ip != bcast_addr && ip != info.ip.addr && ip != info.gw.addr) {
DEBUG_WIFI("[APConfig] DHCP IP end: %s\n", ip.toString().c_str());
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