Introduce the ``keep-session'' option. Refer to the man
page for details. This allows MP over non-tty devices where the original ppp process must not exit (such as sshd-spawned ppp sessions).
This commit is contained in:
Brian Somers
parent
26f13ad079
commit
ac685e314f
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=47689
@ -23,7 +23,7 @@
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: bundle.c,v 1.54 1999/05/27 08:42:15 brian Exp $
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* $Id: bundle.c,v 1.55 1999/05/31 23:57:32 brian Exp $
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*/
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#include <sys/param.h>
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@ -1220,6 +1220,8 @@ bundle_ShowStatus(struct cmdargs const *arg)
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optval(arg->bundle, OPT_SROUTES));
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prompt_Printf(arg->prompt, " ID check: %s\n",
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optval(arg->bundle, OPT_IDCHECK));
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prompt_Printf(arg->prompt, " Keep-Session: %s\n",
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optval(arg->bundle, OPT_KEEPSESSION));
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prompt_Printf(arg->prompt, " Loopback: %s\n",
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optval(arg->bundle, OPT_LOOPBACK));
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prompt_Printf(arg->prompt, " PasswdAuth: %s\n",
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@ -1520,7 +1522,8 @@ bundle_SendDatalink(struct datalink *dl, int s, struct sockaddr_un *sun)
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/* We must get the ACK before closing the descriptor ! */
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read(s, &ack, 1);
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newsid = tcgetpgrp(link_fd) == getpgrp();
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newsid = Enabled(dl->bundle, OPT_KEEPSESSION) ||
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tcgetpgrp(link_fd) == getpgrp();
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close(link_fd);
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if (newsid)
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bundle_setsid(dl->bundle, 1);
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@ -23,7 +23,7 @@
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: bundle.h,v 1.21 1999/01/28 01:56:30 brian Exp $
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* $Id: bundle.h,v 1.22 1999/05/31 23:57:33 brian Exp $
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*/
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#define PHASE_DEAD 0 /* Link is dead */
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@ -35,13 +35,14 @@
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/* cfg.opt bit settings */
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#define OPT_IDCHECK 0x0001
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#define OPT_IFACEALIAS 0x0002
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#define OPT_LOOPBACK 0x0004
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#define OPT_PASSWDAUTH 0x0008
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#define OPT_PROXY 0x0010
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#define OPT_PROXYALL 0x0020
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#define OPT_SROUTES 0x0040
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#define OPT_THROUGHPUT 0x0080
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#define OPT_UTMP 0x0100
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#define OPT_KEEPSESSION 0x0004
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#define OPT_LOOPBACK 0x0008
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#define OPT_PASSWDAUTH 0x0010
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#define OPT_PROXY 0x0020
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#define OPT_PROXYALL 0x0040
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#define OPT_SROUTES 0x0080
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#define OPT_THROUGHPUT 0x0100
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#define OPT_UTMP 0x0200
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#define MAX_ENDDISC_CLASS 5
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@ -17,7 +17,7 @@
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*
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* $Id: command.c,v 1.194 1999/05/15 02:24:16 brian Exp $
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* $Id: command.c,v 1.195 1999/05/31 23:57:35 brian Exp $
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*
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*/
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#include <sys/param.h>
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@ -143,7 +143,7 @@
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#define NEG_DNS 52
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const char Version[] = "2.21";
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const char VersionDate[] = "$Date: 1999/05/15 02:24:16 $";
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const char VersionDate[] = "$Date: 1999/05/31 23:57:35 $";
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static int ShowCommand(struct cmdargs const *);
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static int TerminalCommand(struct cmdargs const *);
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@ -2271,6 +2271,8 @@ static struct cmdtab const NegotiateCommands[] = {
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{"iface-alias", NULL, IfaceAliasOptSet, LOCAL_AUTH,
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"retain interface addresses", "disable|enable",
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(const void *)OPT_IFACEALIAS},
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{"keep-session", NULL, OptSet, LOCAL_AUTH, "Retain device session leader",
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"disable|enable", (const void *)OPT_KEEPSESSION},
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{"loopback", NULL, OptSet, LOCAL_AUTH, "Loop packets for local iface",
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"disable|enable", (const void *)OPT_LOOPBACK},
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{"passwdauth", NULL, OptSet, LOCAL_AUTH, "Use passwd file",
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@ -2286,7 +2288,7 @@ static struct cmdtab const NegotiateCommands[] = {
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{"utmp", NULL, OptSet, LOCAL_AUTH, "Log connections in utmp",
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"disable|enable", (const void *)OPT_UTMP},
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#define OPT_MAX 9 /* accept/deny allowed below and not above */
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#define OPT_MAX 10 /* accept/deny allowed below and not above */
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{"acfcomp", NULL, NegotiateSet, LOCAL_AUTH | LOCAL_CX,
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"Address & Control field compression", "accept|deny|disable|enable",
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@ -16,7 +16,7 @@
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*
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* $Id: physical.c,v 1.14 1999/05/24 16:39:12 brian Exp $
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* $Id: physical.c,v 1.15 1999/06/01 19:08:58 brian Exp $
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*
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*/
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@ -595,8 +595,11 @@ physical2iov(struct physical *p, struct iovec *iov, int *niov, int maxiov,
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p->handler = (struct device *)(long)p->handler->type;
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}
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if (tcgetpgrp(p->fd) == getpgrp())
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if (Enabled(p->dl->bundle, OPT_KEEPSESSION) ||
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tcgetpgrp(p->fd) == getpgrp())
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p->session_owner = getpid(); /* So I'll eventually get HUP'd */
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else
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p->session_owner = (pid_t)-1;
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timer_Stop(&p->link.throughput.Timer);
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physical_ChangedPid(p, newpid);
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}
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@ -618,7 +621,7 @@ physical2iov(struct physical *p, struct iovec *iov, int *niov, int maxiov,
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void
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physical_ChangedPid(struct physical *p, pid_t newpid)
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{
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if (p->fd >= 0 && p->type != PHYS_DIRECT) {
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if (p->fd >= 0 && *p->name.full == '/' && p->type != PHYS_DIRECT) {
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int res;
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if ((res = ID0uu_lock_txfr(p->name.base, newpid)) != UU_LOCK_OK)
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@ -1,4 +1,4 @@
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.\" $Id: ppp.8,v 1.169 1999/05/16 13:39:03 brian Exp $
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.\" $Id: ppp.8,v 1.170 1999/06/01 08:46:53 brian Exp $
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.Dd 20 September 1995
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.nr XX \w'\fC00'
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.Os FreeBSD
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@ -2473,6 +2473,41 @@ field, reporting the fact at the respective log level. If
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is disabled,
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.Nm
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will ignore the identifier field.
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.It keep-session
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Default: Disabled. When
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.Nm
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runs as a Multi-link server, a different
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.Nm
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instance initially receives each connection. After determining that
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the link belongs to an already existing bundle (controlled by another
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.Nm
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invocation),
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.Nm
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will transfer the link to that process.
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.Pp
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If the link is a tty device or if this option is enabled,
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.Nm
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will not exit, but will change its process name to
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.Dq session owner
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and wait for the controlling
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.Nm
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to finish with the link and deliver a signal back to the idle process.
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This prevents the confusion that results from
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.Nm ppp Ns No 's
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parent considering the link resource available again.
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.Pp
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For tty devices that have entries in
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.Pa /etc/ttys ,
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this is necessary to prevent another
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.Xr getty 8
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from being started, and for program links such as
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.Xr sshd 8 ,
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it prevents
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.Xr sshd 8
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from exiting due to the death of its child. As
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.Nm
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cannot determine its parents requirements (except for the tty case), this
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option must be enabled manually depending on the circumstances.
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.It loopback
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Default: Enabled. When
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.Ar loopback
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@ -4535,6 +4570,7 @@ This socket is used to pass links between different instances of
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.Xr pppctl 8 ,
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.Xr pppd 8 ,
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.Xr route 8 ,
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.Xr sshd 8 ,
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.Xr syslogd 8 ,
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.Xr traceroute 8 ,
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.Xr vipw 8
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@ -1,4 +1,4 @@
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.\" $Id: ppp.8,v 1.169 1999/05/16 13:39:03 brian Exp $
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.\" $Id: ppp.8,v 1.170 1999/06/01 08:46:53 brian Exp $
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.Dd 20 September 1995
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.nr XX \w'\fC00'
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.Os FreeBSD
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@ -2473,6 +2473,41 @@ field, reporting the fact at the respective log level. If
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is disabled,
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.Nm
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will ignore the identifier field.
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.It keep-session
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Default: Disabled. When
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.Nm
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runs as a Multi-link server, a different
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.Nm
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instance initially receives each connection. After determining that
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the link belongs to an already existing bundle (controlled by another
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.Nm
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invocation),
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.Nm
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will transfer the link to that process.
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.Pp
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If the link is a tty device or if this option is enabled,
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.Nm
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will not exit, but will change its process name to
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.Dq session owner
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and wait for the controlling
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.Nm
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to finish with the link and deliver a signal back to the idle process.
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This prevents the confusion that results from
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.Nm ppp Ns No 's
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parent considering the link resource available again.
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.Pp
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For tty devices that have entries in
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.Pa /etc/ttys ,
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this is necessary to prevent another
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.Xr getty 8
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from being started, and for program links such as
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.Xr sshd 8 ,
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it prevents
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.Xr sshd 8
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from exiting due to the death of its child. As
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.Nm
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cannot determine its parents requirements (except for the tty case), this
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option must be enabled manually depending on the circumstances.
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.It loopback
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Default: Enabled. When
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.Ar loopback
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@ -4535,6 +4570,7 @@ This socket is used to pass links between different instances of
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.Xr pppctl 8 ,
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.Xr pppd 8 ,
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.Xr route 8 ,
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.Xr sshd 8 ,
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.Xr syslogd 8 ,
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.Xr traceroute 8 ,
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.Xr vipw 8
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