diff options
| author |   provos <provos@openbsd.org> | 1998-11-17 19:23:00 +0000 |
|---|---|---|
| committer | provos <provos@openbsd.org> | 1998-11-17 19:23:00 +0000 |
| commit | 201dac0fe332deeedd3063648eea7a618c7049bf (patch) | |
| tree | c783d955167db8ef59364a6dbe29ae101d63195a /sys/netinet/tcp_subr.c | |
| parent | Add RCS Ids from the EOM repository (diff) | |
| download | wireguard-openbsd-201dac0fe332deeedd3063648eea7a618c7049bf.tar.xz wireguard-openbsd-201dac0fe332deeedd3063648eea7a618c7049bf.zip | |
NewReno, SACK and FACK support for TCP, adapted from code for BSDI
by Hari Balakrishnan (hari@lcs.mit.edu), Tom Henderson (tomh@cs.berkeley.edu)
and Venkat Padmanabhan (padmanab@cs.berkeley.edu) as part of the
Daedalus research group at the University of California,
(http://daedalus.cs.berkeley.edu). [I was able to do this on time spent
at the Center for Information Technology Integration (citi.umich.edu)]
Diffstat (limited to 'sys/netinet/tcp_subr.c')
| -rw-r--r-- | sys/netinet/tcp_subr.c | 28 |
1 files changed, 26 insertions, 2 deletions
diff --git a/sys/netinet/tcp_subr.c b/sys/netinet/tcp_subr.c index 293d769f5d0..255f94e8519 100644 --- a/sys/netinet/tcp_subr.c +++ b/sys/netinet/tcp_subr.c @@ -1,4 +1,4 @@ -/* $OpenBSD: tcp_subr.c,v 1.11 1998/10/28 21:34:33 provos Exp $ */ +/* $OpenBSD: tcp_subr.c,v 1.12 1998/11/17 19:23:02 provos Exp $ */ /* $NetBSD: tcp_subr.c,v 1.22 1996/02/13 23:44:00 christos Exp $ */ /* @@ -77,10 +77,19 @@ int tcp_rttdflt = TCPTV_SRTTDFLT / PR_SLOWHZ; * used as the default). */ #ifndef TCP_DO_RFC1323 -#define TCP_DO_RFC1323 1 +#define TCP_DO_RFC1323 1 #endif int tcp_do_rfc1323 = TCP_DO_RFC1323; +#ifndef TCP_DO_SACK +#ifdef TCP_SACK +#define TCP_DO_SACK 1 +#else +#define TCP_DO_SACK 0 +#endif +#endif +int tcp_do_sack = TCP_DO_SACK; /* RFC 2018 selective ACKs */ + #ifndef TCBHASHSIZE #define TCBHASHSIZE 128 #endif @@ -237,6 +246,9 @@ tcp_newtcpcb(inp) LIST_INIT(&tp->segq); tp->t_maxseg = tp->t_maxopd = tcp_mssdflt; +#ifdef TCP_SACK + tp->sack_disable = tcp_do_sack ? 0 : 1; +#endif tp->t_flags = tcp_do_rfc1323 ? (TF_REQ_SCALE|TF_REQ_TSTMP) : 0; tp->t_inpcb = inp; /* @@ -293,6 +305,9 @@ tcp_close(tp) register struct ipqent *qe; struct inpcb *inp = tp->t_inpcb; struct socket *so = inp->inp_socket; +#ifdef TCP_SACK + struct sackhole *p, *q; +#endif #ifdef RTV_RTT register struct rtentry *rt; @@ -369,6 +384,15 @@ tcp_close(tp) m_freem(qe->ipqe_m); FREE(qe, M_IPQ); } +#ifdef TCP_SACK + /* Free SACK holes. */ + q = p = tp->snd_holes; + while (p != 0) { + q = p->next; + free(p, M_PCB); + p = q; + } +#endif if (tp->t_template) (void) m_free(dtom(tp->t_template)); free(tp, M_PCB); |