X-Git-Url: https://git.rrq.au/?a=blobdiff_plain;f=rrqnet.c;h=27769c8e9343a686f9a76af33749bc3a26ca938d;hb=3ea171c085b92fb6cf260dd3d33e8ef83ea0ba56;hp=6b57d08b304af3e989df44e8d07cdbb7148c3553;hpb=3e3c39307aca3c469d5b7f7c9e6e921dcd84c6f7;p=rrq%2Frrqnet.git

diff --git a/rrqnet.c b/rrqnet.c
index 6b57d08..27769c8 100644
--- a/rrqnet.c
+++ b/rrqnet.c
@@ -188,6 +188,10 @@ static struct {
 // Flag to signal the UDP socket as being ipv6 or not (forced ipv4)
 static int udp6 = 1;
 
+// Flag to indicate tpg transport patch = avoid UDP payload of 1470
+// bytes by adding 2 tag-along bytes
+static int tpg_quirk = 0;
+
 // Flag whether to make some stderr outputs or not.
 // 1 = normal verbosity, 2 = more output, 3 = source debug level stuff
 static int verbose;
@@ -877,11 +881,16 @@ static void write_remote(unsigned char *buf, int n,struct Remote *r) {
     if ( n < 12 ) {
 	VERBOSE2OUT( "SEND %d bytes to %s\n", n, inet_stoa( &r->uaddr ) );
     } else {
-	VERBOSE2OUT( "SEND %s -> %s to %s\n",
+	VERBOSE2OUT( "SEND %d bytes %s -> %s to %s\n", n,
 		     inet_mtoa( buf+6 ), inet_mtoa( buf ),
 		     inet_stoa( &r->uaddr ) );
     }
     memcpy( output, buf, n ); // Use the private buffer for delivery
+    // Apply the TPG quirk
+    if ( tpg_quirk && ( n == 1470 ) ) {
+	VERBOSE2OUT( "tpg quirk applied\n" );
+	n += 8; // Add 8 "random" tag-along bytes
+    }
     if ( r->spec == 0 ) {
 	if ( r->uaddr.in.sa_family == 0 ) {
 	    // Output to tap/stdio
@@ -1402,6 +1411,11 @@ int main(int argc, char *argv[]) {
     ///// Parse command line arguments
     i = 1;
 #define ENSUREARGS(n) if ( argc < i + n ) usage()
+    ENSUREARGS( 1 );
+    if ( strncmp( "-tpg", argv[i], 4 ) == 0 ) {
+	tpg_quirk = 1;
+	i++;
+    }
     ENSUREARGS( 1 );
     // First: optional -v, -vv or -vvv
     if ( strncmp( "-v", argv[i], 2 ) == 0 ) {