Report initial ssthresh value as 0 while debugging.

The initial is actually UINT_MAX, but since this makes it hard to plot a
graph of it with autoscaling axes, show it as 0 instead. This removes the
hack where ssthresh is set to sndbuf.maxsize at the start of a connection,
which is wrong when the application overrides the send buffer size later.

diff --git a/utcp.c b/utcp.c
index 7c30246cb066d1edccaa1fd5a48a7ec0a0fcedde..b53541d5e3e6bab3400daf70ed8141e9b018b01c 100644 (file)
--- a/utcp.c
+++ b/utcp.c
@@ -128,7 +128,7 @@ static void print_packet(struct utcp_connection *c, const char *dir, const void
 }
 
 static void debug_cwnd(struct utcp_connection *c) {
-       debug(c, "snd.cwnd %u snd.ssthresh %u\n", c->snd.cwnd, c->snd.ssthresh);
+       debug(c, "snd.cwnd %u snd.ssthresh %u\n", c->snd.cwnd, ~c->snd.ssthresh ? c->snd.ssthresh : 0);
 }
 #else
 #define debug(...) do {} while(0)
@@ -402,11 +402,7 @@ static struct utcp_connection *allocate_connection(struct utcp *utcp, uint16_t s
        c->snd.nxt = c->snd.iss + 1;
        c->snd.last = c->snd.nxt;
        c->snd.cwnd = (utcp->mtu > 2190 ? 2 : utcp->mtu > 1095 ? 3 : 4) * utcp->mtu;
-#if UTCP_DEBUG
-       c->snd.ssthresh = c->sndbuf.maxsize;
-#else
        c->snd.ssthresh = ~0;
-#endif
        debug_cwnd(c);
        c->utcp = utcp;