Date: Thu, 4 Apr 1996 13:25:35 +1000 From: Bruce Evans <bde@zeta.org.au> To: jgreco@brasil.moneng.mei.com, phk@critter.tfs.com Cc: hackers@FreeBSD.ORG Subject: Re: SO_KEEPALIVE - New feature patch enclosed. Message-ID: <199604040325.NAA21196@godzilla.zeta.org.au>
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>It seems to work for me. I warn you now, though, I'm no kernel hacker.
It's much easier to control the variable in -current. For integer variables
it takes one line. Something like:
SYSCTL_INT(_net_inet_tcp, OID_AUTO, foo, CTLFLAG_RW, &foo, 0, "");
>*** /usr/src/sys/netinet/tcp_var.h.fcs Sat Jul 29 18:16:53 1995
>--- /usr/src/sys/netinet/tcp_var.h Tue Apr 2 22:41:01 1996
>***************
>*** 300,306 ****
> #define TCPCTL_KEEPINTVL 7 /* interval to send keepalives */
> #define TCPCTL_SENDSPACE 8 /* send buffer space */
> #define TCPCTL_RECVSPACE 9 /* receive buffer space */
>! #define TCPCTL_MAXID 10
>
> #define TCPCTL_NAMES { \
> { 0, 0 }, \
>--- 300,307 ----
> #define TCPCTL_KEEPINTVL 7 /* interval to send keepalives */
> #define TCPCTL_SENDSPACE 8 /* send buffer space */
> #define TCPCTL_RECVSPACE 9 /* receive buffer space */
>! #define TCPCTL_DO_KEEPALIVE 10 /* do keepalive's by default */
>! #define TCPCTL_MAXID 11
>
> #define TCPCTL_NAMES { \
> { 0, 0 }, \
OID_AUTO avoids the braindamaged MAXID stuff at the cost of not providing
a numeric id for programs to use. The name has to be looked up as a string.
This is all that is necessary using sysctl(8).
Bruce
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