aboutsummaryrefslogtreecommitdiffstats
path: root/src/vnet/tcp/tcp_output.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/vnet/tcp/tcp_output.c')
-rw-r--r--src/vnet/tcp/tcp_output.c46
1 files changed, 5 insertions, 41 deletions
diff --git a/src/vnet/tcp/tcp_output.c b/src/vnet/tcp/tcp_output.c
index 862f4a2f307..239f6035d5f 100644
--- a/src/vnet/tcp/tcp_output.c
+++ b/src/vnet/tcp/tcp_output.c
@@ -76,19 +76,6 @@ tcp_window_compute_scale (u32 window)
}
/**
- * Update max segment size we're able to process.
- *
- * The value is constrained by our interface's MTU and IP options. It is
- * also what we advertise to our peer.
- */
-void
-tcp_update_rcv_mss (tcp_connection_t * tc)
-{
- /* TODO find our iface MTU */
- tc->mss = tcp_cfg.default_mtu - sizeof (tcp_header_t);
-}
-
-/**
* TCP's initial window
*/
always_inline u32
@@ -263,16 +250,16 @@ tcp_options_write (u8 * data, tcp_options_t * opts)
}
static int
-tcp_make_syn_options (tcp_options_t * opts, u8 wnd_scale)
+tcp_make_syn_options (tcp_connection_t * tc, tcp_options_t * opts)
{
u8 len = 0;
opts->flags |= TCP_OPTS_FLAG_MSS;
- opts->mss = tcp_cfg.default_mtu; /*XXX discover that */
+ opts->mss = tc->mss;
len += TCP_OPTION_LEN_MSS;
opts->flags |= TCP_OPTS_FLAG_WSCALE;
- opts->wscale = wnd_scale;
+ opts->wscale = tc->rcv_wscale;
len += TCP_OPTION_LEN_WINDOW_SCALE;
opts->flags |= TCP_OPTS_FLAG_TSTAMP;
@@ -379,7 +366,7 @@ tcp_make_options (tcp_connection_t * tc, tcp_options_t * opts,
case TCP_STATE_SYN_RCVD:
return tcp_make_synack_options (tc, opts);
case TCP_STATE_SYN_SENT:
- return tcp_make_syn_options (opts, tc->rcv_wscale);
+ return tcp_make_syn_options (tc, opts);
default:
clib_warning ("State not handled! %d", state);
return 0;
@@ -422,29 +409,6 @@ tcp_update_burst_snd_vars (tcp_connection_t * tc)
tcp_cc_event (tc, TCP_CC_EVT_START_TX);
}
-void
-tcp_init_mss (tcp_connection_t * tc)
-{
- u16 default_min_mss = 536;
- tcp_update_rcv_mss (tc);
-
- /* TODO cache mss and consider PMTU discovery */
- tc->snd_mss = clib_min (tc->rcv_opts.mss, tc->mss);
-
- if (tc->snd_mss < 45)
- {
- /* Assume that at least the min default mss works */
- tc->snd_mss = default_min_mss;
- tc->rcv_opts.mss = default_min_mss;
- }
-
- /* We should have enough space for 40 bytes of options */
- ASSERT (tc->snd_mss > 45);
-
- /* If we use timestamp option, account for it */
- if (tcp_opts_tstamp (&tc->rcv_opts))
- tc->snd_mss -= TCP_OPTION_LEN_TIMESTAMP;
-}
#endif /* CLIB_MARCH_VARIANT */
static void *
@@ -542,7 +506,7 @@ tcp_make_syn (tcp_connection_t * tc, vlib_buffer_t * b)
/* Make and write options */
clib_memset (&snd_opts, 0, sizeof (snd_opts));
- tcp_opts_len = tcp_make_syn_options (&snd_opts, tc->rcv_wscale);
+ tcp_opts_len = tcp_make_syn_options (tc, &snd_opts);
tcp_hdr_opts_len = tcp_opts_len + sizeof (tcp_header_t);
th = vlib_buffer_push_tcp (b, tc->c_lcl_port, tc->c_rmt_port, tc->iss,