Andrew Boyson / net

A stack which works with or without an Mbed os library. Provides IPv4 or IPv6 with a full 1500 byte buffer.

Dependents:   oldheating gps motorhome heating

Diff: udp/dns/dnslabel.c

Revision:
183:ee809769bf89
Parent:
182:ff48c6ea91c1
--- a/udp/dns/dnslabel.c	Sun Jan 10 11:52:19 2021 +0000
+++ b/udp/dns/dnslabel.c	Tue Jan 12 19:10:22 2021 +0000
@@ -5,6 +5,16 @@
 #include "dnslabel.h"
 #include "dhcp.h"
 
+bool DnsLabelIsExternal(char* p)
+{
+    while (true)
+    {
+        if (*p == '\0') return false;
+        if (*p == '.') return true;
+        p++;
+    }
+}
+
 void DnsLabelCopy(char* dst, char* src)
 {
     strncpy(dst, src, DNS_MAX_LABEL_LENGTH); //Copies up to 63 bytes