Uses hard-coded value of 1460 bytes in TCP throughput calculation.
Signed-off-by: Tommi Saviranta <[EMAIL PROTECTED]>
---
diff -Nrup a/net/dccp/ccids/ccid4.c b/net/dccp/ccids/ccid4.c
--- a/net/dccp/ccids/ccid4.c 2007-09-20 13:32:42.000000000 +0300
+++ b/net/dccp/ccids/ccid4.c 2007-09-20 14:02:43.000000000 +0300
@@ -459,7 +459,7 @@ static void ccid4_hc_tx_packet_recv(stru
}
/* perform step (4) of draft rfc3448bis, section 4.3 */
if (hctx->ccid4hctx_p > 0)
- hctx->ccid4hctx_x_calc = tfrc_calc_x(hctx->ccid4hctx_s,
+ hctx->ccid4hctx_x_calc = tfrc_calc_x(1460,
hctx->ccid4hctx_rtt,
hctx->ccid4hctx_p);
ccid4_hc_tx_update_x(sk, &now);
@@ -740,7 +740,7 @@ static int ccid4_hc_rx_insert_options(st
return 0;
}
-/** ccid4_first_li - Implements [RFC 3448, 6.3.1]
+/** ccid4_first_li - Implements [RFC 3448, 6.3.1], with s = 1460 [TFRC-SP]
*
* Determine the length of the first loss interval via inverse lookup.
* Assume that X_recv can be computed by the throughput equation
@@ -770,7 +770,7 @@ static u32 ccid4_first_li(struct sock *s
}
}
- fval = scaled_div(hcrx->ccid4hcrx_s, hcrx->ccid4hcrx_rtt);
+ fval = scaled_div(1460, hcrx->ccid4hcrx_rtt);
fval = scaled_div32(fval, x_recv);
p = tfrc_calc_x_reverse_lookup(fval);
-
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