Define two new inpcb flags in the inp_vflag field, which for whatever

reason, seems to be where new flags are getting defined:

INP_DROPPED - The protocol has terminated this connection and the socket
              is not reusable: when the socket code enters the protocol,
              an error is immediately returned.  This will substitute for
              NULLing the so_pcb socket field, helping to implement the
              invariant that all valid sockets have valid pcb's in TCP.

INP_SOCKREF - The protocol has become the owner of the socket reference,
              and will need to free it when freeing the pcb, which will
              be used when a TCP socket is closed but still has queued
              data.

MFC after:	1 month

1 files changed, 2 insertions, 0 deletions

diff --git a/sys/netinet/in_pcb.h b/sys/netinet/in_pcb.h
index 87b65d6..ffdcad1 100644
--- a/sys/netinet/in_pcb.h
+++ b/sys/netinet/in_pcb.h
@@ -131,6 +131,8 @@ struct inpcb {
 #define	INP_IPV6PROTO	0x4		/* opened under IPv6 protocol */
 #define	INP_TIMEWAIT	0x8		/* .. probably doesn't go here */
 #define	INP_ONESBCAST	0x10		/* send all-ones broadcast */
+#define	INP_DROPPED	0x20		/* protocol drop flag */
+#define	INP_SOCKREF	0x40		/* strong socket reference */
 	u_char	inp_ip_ttl;		/* time to live proto */
 	u_char	inp_ip_p;		/* protocol proto */
 	u_char	inp_ip_minttl;		/* minimum TTL or drop */