X-Git-Url: https://git.rrq.au/?a=blobdiff_plain;f=rrqnet.c;h=fa8d3f660963624871d97736458ecb5a1e3140e4;hb=a6238294b80a2d98d3768131a457d00f4b2b9578;hp=6b57d08b304af3e989df44e8d07cdbb7148c3553;hpb=e8cbd15f0a2d8492b5b0eaa16fb0602483b4d91a;p=rrq%2Frrqnet.git

diff --git a/rrqnet.c b/rrqnet.c
index 6b57d08..fa8d3f6 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 > 1460 ) && ( n < 1478 ) ) {
+	VERBOSE2OUT( "tpg quirk applied\n" );
+	n = 1478; // Add some "random" tag-along bytes
+    }
     if ( r->spec == 0 ) {
 	if ( r->uaddr.in.sa_family == 0 ) {
 	    // Output to tap/stdio
@@ -1417,6 +1426,11 @@ int main(int argc, char *argv[]) {
 	i++;
 	ENSUREARGS( 1 );
     }
+    if ( strncmp( "-tpg", argv[i], 4 ) == 0 ) {
+	tpg_quirk = 1;
+	i++;
+	ENSUREARGS( 1 );
+    }
     // then: optional -4
     if ( strncmp( "-4", argv[i], 2 ) == 0 ) {
 	udp6 = 0;