diff --git a/src/seeder/dns.h b/src/seeder/dns.h
--- a/src/seeder/dns.h
+++ b/src/seeder/dns.h
@@ -2,6 +2,8 @@
 #define BITCOIN_SEEDER_DNS_H 1
 
 #include <cstdint>
+#include <cstdio>
+#include <cstring>
 
 struct addr_t {
     int v;
@@ -24,6 +26,50 @@
     uint64_t nRequests;
 };
 
+//  0: ok
+// -1: premature end of input, forward reference, component > 63 char, invalid
+// character
+// -2: insufficient space in output
+static inline int parse_name(const uint8_t **inpos, const uint8_t *inend,
+                             const uint8_t *inbuf, char *buf, size_t bufsize) {
+    size_t bufused = 0;
+    int init = 1;
+    do {
+        if (*inpos == inend) return -1;
+        // read length of next component
+        int octet = *((*inpos)++);
+        if (octet == 0) {
+            buf[bufused] = 0;
+            return 0;
+        }
+        // add dot in output
+        if (!init) {
+            if (bufused == bufsize - 1) return -2;
+            buf[bufused++] = '.';
+        } else
+            init = 0;
+        // handle references
+        if ((octet & 0xC0) == 0xC0) {
+            if (*inpos == inend) return -1;
+            int ref = ((octet - 0xC0) << 8) + *((*inpos)++);
+            if (ref < 0 || ref >= (*inpos) - inbuf - 2) return -1;
+            const uint8_t *newbuf = inbuf + ref;
+            return parse_name(&newbuf, (*inpos) - 2, inbuf, buf + bufused,
+                              bufsize - bufused);
+        }
+        if (octet > 63) return -1;
+        // copy label
+        while (octet) {
+            if (*inpos == inend) return -1;
+            if (bufused == bufsize - 1) return -2;
+            int c = *((*inpos)++);
+            if (c == '.') return -1;
+            octet--;
+            buf[bufused++] = c;
+        }
+    } while (1);
+}
+
 int dnsserver(dns_opt_t *opt);
 
 #endif // BITCOIN_SEEDER_DNS_H
diff --git a/src/seeder/dns.cpp b/src/seeder/dns.cpp
--- a/src/seeder/dns.cpp
+++ b/src/seeder/dns.cpp
@@ -46,50 +46,6 @@
     QTYPE_ANY = 255
 } dns_type;
 
-//  0: ok
-// -1: premature end of input, forward reference, component > 63 char, invalid
-// character
-// -2: insufficient space in output
-static int parse_name(const uint8_t **inpos, const uint8_t *inend,
-                      const uint8_t *inbuf, char *buf, size_t bufsize) {
-    size_t bufused = 0;
-    int init = 1;
-    do {
-        if (*inpos == inend) return -1;
-        // read length of next component
-        int octet = *((*inpos)++);
-        if (octet == 0) {
-            buf[bufused] = 0;
-            return 0;
-        }
-        // add dot in output
-        if (!init) {
-            if (bufused == bufsize - 1) return -2;
-            buf[bufused++] = '.';
-        } else
-            init = 0;
-        // handle references
-        if ((octet & 0xC0) == 0xC0) {
-            if (*inpos == inend) return -1;
-            int ref = ((octet - 0xC0) << 8) + *((*inpos)++);
-            if (ref < 0 || ref >= (*inpos) - inbuf - 2) return -1;
-            const uint8_t *newbuf = inbuf + ref;
-            return parse_name(&newbuf, (*inpos) - 2, inbuf, buf + bufused,
-                              bufsize - bufused);
-        }
-        if (octet > 63) return -1;
-        // copy label
-        while (octet) {
-            if (*inpos == inend) return -1;
-            if (bufused == bufsize - 1) return -2;
-            int c = *((*inpos)++);
-            if (c == '.') return -1;
-            octet--;
-            buf[bufused++] = c;
-        }
-    } while (1);
-}
-
 //  0: k
 // -1: component > 63 characters
 // -2: insufficent space in output
@@ -579,10 +535,10 @@
 
     for (; 1; ++(opt->nRequests)) {
         ssize_t insize = recvmsg(listenSocket, &msg, 0);
-        //    uint8_t *addr = (uint8_t*)&si_other.sin_addr.s_addr;
-        //    fprintf(stdout, "DNS: Request %llu from %i.%i.%i.%i:%i of %i
-        //    bytes\n", (unsigned long long)(opt->nRequests), addr[0], addr[1],
-        //    addr[2], addr[3], ntohs(si_other.sin_port), (int)insize);
+        // uint8_t *addr = (uint8_t*)&si_other.sin6_addr.s6_addr;
+        // fprintf(stdout, "DNS: Request %llu from %i.%i.%i.%i:%i of %i
+        // bytes\n", (unsigned long long)(opt->nRequests), addr[0], addr[1],
+        // addr[2], addr[3], ntohs(si_other.sin6_port), (int)insize);
         if (insize <= 0) continue;
 
         ssize_t ret = dnshandle(opt, inbuf, insize, outbuf);