From 9f0b7261e5803ac4269b8390d55d1cce84d38829 Mon Sep 17 00:00:00 2001 From: goldsimon Date: Sat, 13 Mar 2010 15:04:08 +0000 Subject: [PATCH] Fix calculation of tcp_mss(): when timestamps are on, this is pcb->mss - 12 or else NOCOPY-apps might generate unperformant PBUF_REF chains --- src/include/lwip/tcp.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/include/lwip/tcp.h b/src/include/lwip/tcp.h index f11b4cf3..a09c5ef7 100644 --- a/src/include/lwip/tcp.h +++ b/src/include/lwip/tcp.h @@ -320,7 +320,7 @@ void tcp_sent (struct tcp_pcb *pcb, tcp_sent_fn sent); void tcp_poll (struct tcp_pcb *pcb, tcp_poll_fn poll, u8_t interval); void tcp_err (struct tcp_pcb *pcb, tcp_err_fn err); -#define tcp_mss(pcb) ((pcb)->mss) +#define tcp_mss(pcb) (((pcb)->flags & TF_TIMESTAMP) ? ((pcb)->mss - 12) : (pcb)->mss) #define tcp_sndbuf(pcb) ((pcb)->snd_buf) #define tcp_sndqueuelen(pcb) ((pcb)->snd_queuelen) #define tcp_nagle_disable(pcb) ((pcb)->flags |= TF_NODELAY)