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WiFiUDP: fix crash when calling destinationIP with no packet available (#4036)

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Fixes https://github.com/esp8266/Arduino/issues/3989.
This commit is contained in:
Ivan Grokhotkov 2017-12-28 03:15:11 +01:00 committed by Develo
parent db1cfc7772
commit 7fc23c6f7a
1 changed files with 3 additions and 0 deletions
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3
libraries/ESP8266WiFi/src/include/UdpContext.h
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@ -163,6 +163,9 @@ public:
uint32_t getDestAddress() uint32_t getDestAddress()
{ {
if (!_rx_buf)
return 0;
ip_hdr* iphdr = GET_IP_HDR(_rx_buf); ip_hdr* iphdr = GET_IP_HDR(_rx_buf);
return iphdr->dest.addr; return iphdr->dest.addr;
} }