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diff --git a/dnscache.c b/dnscache.c
index 8c899a3..8b10571 100644
--- a/dnscache.c
+++ b/dnscache.c
@@ -51,6 +51,7 @@ static char myipincoming[4];
static char buf[1024];
uint64 numqueries = 0;
+static unsigned int truncate_len = 512;
static int udp53;
@@ -77,7 +78,7 @@ void u_respond(int j)
{
if (!u[j].active) return;
response_id(u[j].id);
- if (response_len > 512) response_tc();
+ if (response_len > truncate_len) response_tc();
socket_send4(udp53,response,response_len,u[j].ip,u[j].port);
log_querydone(&u[j].active,response_len);
u[j].active = 0; --uactive;
@@ -431,6 +432,15 @@ int main()
if (!cache_init(cachesize))
strerr_die3x(111,FATAL,"not enough memory for cache of size ",x);
+ x = env_get("TRUNCATELEN");
+ if (x) {
+ scan_ulong(x,&truncate_len);
+ if (truncate_len < 512)
+ truncate_len = 512;
+ if (truncate_len > 16384)
+ truncate_len = 16384;
+ }
+
if (env_get("HIDETTL"))
response_hidettl();
if (env_get("FORWARDONLY"))
diff --git a/server.c b/server.c
index e486fe1..63ad11c 100644
--- a/server.c
+++ b/server.c
@@ -2,6 +2,7 @@
#include "case.h"
#include "env.h"
#include "buffer.h"
+#include "scan.h"
#include "strerr.h"
#include "ip4.h"
#include "uint16.h"
@@ -83,6 +84,7 @@ int main()
{
char *x;
int udp53;
+ unsigned int truncate_len = 512;
x = env_get("IP");
if (!x)
@@ -105,11 +107,19 @@ int main()
buffer_putsflush(buffer_2,starting);
+ x = env_get("TRUNCATELEN");
+ if (x) {
+ scan_ulong(x,&truncate_len);
+ if (truncate_len < 512)
+ truncate_len = 512;
+ if (truncate_len > 16384)
+ truncate_len = 16384;
+ }
for (;;) {
len = socket_recv4(udp53,buf,sizeof buf,ip,&port);
if (len < 0) continue;
if (!doit()) continue;
- if (response_len > 512) response_tc();
+ if (response_len > truncate_len) response_tc();
socket_send4(udp53,response,response_len,ip,port);
/* may block for buffer space; if it fails, too bad */
}
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