diff options
author | hsu <hsu@FreeBSD.org> | 2003-07-15 21:49:53 +0000 |
---|---|---|
committer | hsu <hsu@FreeBSD.org> | 2003-07-15 21:49:53 +0000 |
commit | 58acc5cc7759d48d4657b2cebf6cae1b298b4c73 (patch) | |
tree | 36d4a503a9c109905df229081f20d0f9c880956b /sys/netinet/tcp_var.h | |
parent | cb4467d0644178df3985f6ce76adaa8decbecd8a (diff) | |
download | FreeBSD-src-58acc5cc7759d48d4657b2cebf6cae1b298b4c73.zip FreeBSD-src-58acc5cc7759d48d4657b2cebf6cae1b298b4c73.tar.gz |
Unify the "send high" and "recover" variables as specified in the
lastest rev of the spec. Use an explicit flag for Fast Recovery. [1]
Fix bug with exiting Fast Recovery on a retransmit timeout
diagnosed by Lu Guohan. [2]
Reviewed by: Thomas Henderson <thomas.r.henderson@boeing.com>
Reported and tested by: Lu Guohan <lguohan00@mails.tsinghua.edu.cn> [2]
Approved by: Thomas Henderson <thomas.r.henderson@boeing.com>,
Sally Floyd <floyd@acm.org> [1]
Diffstat (limited to 'sys/netinet/tcp_var.h')
-rw-r--r-- | sys/netinet/tcp_var.h | 49 |
1 files changed, 27 insertions, 22 deletions
diff --git a/sys/netinet/tcp_var.h b/sys/netinet/tcp_var.h index 11474b0..23898b9 100644 --- a/sys/netinet/tcp_var.h +++ b/sys/netinet/tcp_var.h @@ -83,26 +83,28 @@ struct tcpcb { struct inpcb *t_inpcb; /* back pointer to internet pcb */ int t_state; /* state of this connection */ u_int t_flags; -#define TF_ACKNOW 0x00001 /* ack peer immediately */ -#define TF_DELACK 0x00002 /* ack, but try to delay it */ -#define TF_NODELAY 0x00004 /* don't delay packets to coalesce */ -#define TF_NOOPT 0x00008 /* don't use tcp options */ -#define TF_SENTFIN 0x00010 /* have sent FIN */ -#define TF_REQ_SCALE 0x00020 /* have/will request window scaling */ -#define TF_RCVD_SCALE 0x00040 /* other side has requested scaling */ -#define TF_REQ_TSTMP 0x00080 /* have/will request timestamps */ -#define TF_RCVD_TSTMP 0x00100 /* a timestamp was received in SYN */ -#define TF_SACK_PERMIT 0x00200 /* other side said I could SACK */ -#define TF_NEEDSYN 0x00400 /* send SYN (implicit state) */ -#define TF_NEEDFIN 0x00800 /* send FIN (implicit state) */ -#define TF_NOPUSH 0x01000 /* don't push */ -#define TF_REQ_CC 0x02000 /* have/will request CC */ -#define TF_RCVD_CC 0x04000 /* a CC was received in SYN */ -#define TF_SENDCCNEW 0x08000 /* send CCnew instead of CC in SYN */ -#define TF_MORETOCOME 0x10000 /* More data to be appended to sock */ -#define TF_LQ_OVERFLOW 0x20000 /* listen queue overflow */ -#define TF_LASTIDLE 0x40000 /* connection was previously idle */ -#define TF_RXWIN0SENT 0x80000 /* sent a receiver win 0 in response */ +#define TF_ACKNOW 0x000001 /* ack peer immediately */ +#define TF_DELACK 0x000002 /* ack, but try to delay it */ +#define TF_NODELAY 0x000004 /* don't delay packets to coalesce */ +#define TF_NOOPT 0x000008 /* don't use tcp options */ +#define TF_SENTFIN 0x000010 /* have sent FIN */ +#define TF_REQ_SCALE 0x000020 /* have/will request window scaling */ +#define TF_RCVD_SCALE 0x000040 /* other side has requested scaling */ +#define TF_REQ_TSTMP 0x000080 /* have/will request timestamps */ +#define TF_RCVD_TSTMP 0x000100 /* a timestamp was received in SYN */ +#define TF_SACK_PERMIT 0x000200 /* other side said I could SACK */ +#define TF_NEEDSYN 0x000400 /* send SYN (implicit state) */ +#define TF_NEEDFIN 0x000800 /* send FIN (implicit state) */ +#define TF_NOPUSH 0x001000 /* don't push */ +#define TF_REQ_CC 0x002000 /* have/will request CC */ +#define TF_RCVD_CC 0x004000 /* a CC was received in SYN */ +#define TF_SENDCCNEW 0x008000 /* send CCnew instead of CC in SYN */ +#define TF_MORETOCOME 0x010000 /* More data to be appended to sock */ +#define TF_LQ_OVERFLOW 0x020000 /* listen queue overflow */ +#define TF_LASTIDLE 0x040000 /* connection was previously idle */ +#define TF_RXWIN0SENT 0x080000 /* sent a receiver win 0 in response */ +#define TF_FASTRECOVERY 0x100000 /* in NewReno Fast Recovery */ +#define TF_WASFRECOVERY 0x200000 /* was in NewReno Fast Recovery */ int t_force; /* 1 if forcing out a byte */ tcp_seq snd_una; /* send unacknowledged */ @@ -131,7 +133,6 @@ struct tcpcb { */ u_long snd_bandwidth; /* calculated bandwidth or 0 */ tcp_seq snd_recover; /* for use in NewReno Fast Recovery */ - tcp_seq snd_high; /* for use in NewReno Fast Recovery */ u_int t_maxopd; /* mss plus options */ @@ -175,11 +176,15 @@ struct tcpcb { /* experimental */ u_long snd_cwnd_prev; /* cwnd prior to retransmit */ u_long snd_ssthresh_prev; /* ssthresh prior to retransmit */ - tcp_seq snd_high_prev; /* snd_high prior to retransmit */ + tcp_seq snd_recover_prev; /* snd_recover prior to retransmit */ u_long t_badrxtwin; /* window for retransmit recovery */ u_char snd_limited; /* segments limited transmitted */ }; +#define IN_FASTRECOVERY(tp) (tp->t_flags & TF_FASTRECOVERY) +#define ENTER_FASTRECOVERY(tp) tp->t_flags |= TF_FASTRECOVERY +#define EXIT_FASTRECOVERY(tp) tp->t_flags &= ~TF_FASTRECOVERY + /* * Structure to hold TCP options that are only used during segment * processing (in tcp_input), but not held in the tcpcb. |