[DCCP]: Add sysctls to control retransmission behaviour

[safe/jmp/linux-2.6] / net / dccp / timer.c

diff --git a/net/dccp/timer.c b/net/dccp/timer.c
index bda0af6..7b3f16e 100644 (file)
--- a/net/dccp/timer.c
+++ b/net/dccp/timer.c
@@ -15,6 +15,11 @@
 
 #include "dccp.h"
 
+/* sysctl variables governing numbers of retransmission attempts */
+int  sysctl_dccp_request_retries       __read_mostly = TCP_SYN_RETRIES;
+int  sysctl_dccp_retries1              __read_mostly = TCP_RETR1;
+int  sysctl_dccp_retries2              __read_mostly = TCP_RETR2;
+
 static void dccp_write_timer(unsigned long data);
 static void dccp_keepalive_timer(unsigned long data);
 static void dccp_delack_timer(unsigned long data);
@@ -44,11 +49,10 @@ static int dccp_write_timeout(struct sock *sk)
        if (sk->sk_state == DCCP_REQUESTING || sk->sk_state == DCCP_PARTOPEN) {
                if (icsk->icsk_retransmits != 0)
                        dst_negative_advice(&sk->sk_dst_cache);
-               retry_until = icsk->icsk_syn_retries ? :
-                           /* FIXME! */ 3 /* FIXME! sysctl_tcp_syn_retries */;
+               retry_until = icsk->icsk_syn_retries ?
+                           : sysctl_dccp_request_retries;
        } else {
-               if (icsk->icsk_retransmits >=
-                    /* FIXME! sysctl_tcp_retries1 */ 5 /* FIXME! */) {
+               if (icsk->icsk_retransmits >= sysctl_dccp_retries1) {
                        /* NOTE. draft-ietf-tcpimpl-pmtud-01.txt requires pmtu
                           black hole detection. :-(
 
@@ -72,7 +76,7 @@ static int dccp_write_timeout(struct sock *sk)
                        dst_negative_advice(&sk->sk_dst_cache);
                }
 
-               retry_until = /* FIXME! */ 15 /* FIXME! sysctl_tcp_retries2 */;
+               retry_until = sysctl_dccp_retries2;
                /*
                 * FIXME: see tcp_write_timout and tcp_out_of_resources
                 */
@@ -196,7 +200,7 @@ backoff:
        icsk->icsk_rto = min(icsk->icsk_rto << 1, DCCP_RTO_MAX);
        inet_csk_reset_xmit_timer(sk, ICSK_TIME_RETRANS, icsk->icsk_rto,
                                  DCCP_RTO_MAX);
-       if (icsk->icsk_retransmits > 3 /* FIXME: sysctl_dccp_retries1 */)
+       if (icsk->icsk_retransmits > sysctl_dccp_retries1)
                __sk_dst_reset(sk);
 out:;
 }