X-Git-Url: http://git.ozlabs.org/?p=ppp.git;a=blobdiff_plain;f=pppd%2Fsys-NeXT.c;h=ee2cece2f4e0bbfad49e480f1c3957005d01809e;hp=a23f611251457806b012c49c0439b158fbfb3d3f;hb=96dad36e1d37716004171559280613739e7df29e;hpb=a17e555c2c3755105dc62a6c96f6d49556aff1d5

diff --git a/pppd/sys-NeXT.c b/pppd/sys-NeXT.c
index a23f611..ee2cece 100644
--- a/pppd/sys-NeXT.c
+++ b/pppd/sys-NeXT.c
@@ -20,7 +20,7 @@
  */
 
 #ifndef lint
-static char rcsid[] = "$Id: sys-NeXT.c,v 1.1 1995/08/10 06:48:34 paulus Exp $";
+static char rcsid[] = "$Id: sys-NeXT.c,v 1.8 1997/04/30 05:57:14 paulus Exp $";
 #endif
 
 #include <stdio.h>
@@ -56,6 +56,11 @@ static char rcsid[] = "$Id: sys-NeXT.c,v 1.1 1995/08/10 06:48:34 paulus Exp $";
 #include "pppd.h"
 
 static int initdisc = -1;	/* Initial TTY discipline */
+static int initfdflags = -1;	/* Initial file descriptor flags for fd */
+static int ppp_fd = -1;		/* fd which is set to PPP discipline */
+static int loop_slave = -1;
+static int loop_master;
+static char loop_name[20];
 
 extern int errno;
 
@@ -64,12 +69,24 @@ static struct termios inittermios; /* Initial TTY termios */
 
 static char *lock_file;
 
-int sockfd;			/* socket for doing interface ioctls */
+static int sockfd;		/* socket for doing interface ioctls */
 
 #if defined(i386) && defined(HAS_BROKEN_IOCTL)
 #define	ioctl	myioctl
 #endif
 
+static int if_is_up;		/* the interface is currently up */
+static u_int32_t default_route_gateway;	/* gateway addr for default route */
+static u_int32_t proxy_arp_addr;	/* remote addr for proxy arp */
+
+/* Prototypes for procedures local to this file. */
+static int translate_speed __P((int));
+static int baud_rate_of __P((int));
+static int dodefaultroute __P((u_int32_t, int));
+static int get_ether_addr __P((u_int32_t, struct sockaddr *));
+static int ether_by_host __P((char *, struct ether_addr *));
+
+
 /*
  * sys_init - System-dependent initialization.
  */
@@ -78,8 +95,6 @@ sys_init()
 {
     openlog("pppd", LOG_PID | LOG_NDELAY, LOG_PPP);
     setlogmask(LOG_UPTO(LOG_INFO));
-    if (debug)
-	setlogmask(LOG_UPTO(LOG_DEBUG));
 
     /* Get an internet socket for doing socket ioctl's on. */
     if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
@@ -88,6 +103,31 @@ sys_init()
     }
 }
 
+/*
+ * sys_cleanup - restore any system state we modified before exiting:
+ * mark the interface down, delete default route and/or proxy arp entry.
+ * This should call die() because it's called from die().
+ */
+void
+sys_cleanup()
+{
+    struct ifreq ifr;
+
+    if (if_is_up) {
+	strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
+	if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) >= 0
+	    && ((ifr.ifr_flags & IFF_UP) != 0)) {
+	    ifr.ifr_flags &= ~IFF_UP;
+	    ioctl(sockfd, SIOCSIFFLAGS, &ifr);
+	}
+    }
+
+    if (default_route_gateway)
+	cifdefaultroute(0, 0, default_route_gateway);
+    if (proxy_arp_addr)
+	cifproxyarp(0, proxy_arp_addr);
+}
+
 /*
  * note_debug_level - note a change in the debug level.
  */
@@ -111,6 +151,7 @@ ppp_available()
 {
     int s, ok;
     struct ifreq ifr;
+    extern char *no_ppp_msg;
 
     if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
 	return 1;		/* can't tell - maybe we're not root */
@@ -119,6 +160,11 @@ ppp_available()
     ok = ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) >= 0;
     close(s);
 
+    no_ppp_msg = "\
+This system lacks kernel support for PPP.  To include PPP support\n\
+in the kernel, please follow the steps detailed in the README.NeXT\n\
+file in the ppp-2.2 distribution.\n";
+
     return ok;
 }
 
@@ -126,7 +172,8 @@ ppp_available()
  * establish_ppp - Turn the serial port into a ppp interface.
  */
 void
-establish_ppp()
+establish_ppp(fd)
+    int fd;
 {
     int pppdisc = PPPDISC;
     int x;
@@ -160,6 +207,16 @@ establish_ppp()
 		syslog(LOG_WARNING, "ioctl(PPPIOCSFLAGS): %m");
 	}
     }
+
+    /*
+     * Set device for non-blocking reads so PPPD can poll for
+     * input from the kernel.
+     */
+    if ((initfdflags = fcntl(fd, F_GETFL)) == -1
+	|| fcntl(fd, F_SETFL, initfdflags | O_NONBLOCK) == -1) {
+	syslog(LOG_WARNING, "Couldn't set device to non-blocking mode: %m");
+    }
+
 }
 
 
@@ -168,38 +225,49 @@ establish_ppp()
  * This shouldn't call die() because it's called from die().
  */
 void
-disestablish_ppp()
+disestablish_ppp(fd)
+    int fd;
+{
+    /* Reset non-blocking mode on fd. */
+    if (initfdflags != -1 && fcntl(fd, F_SETFL, initfdflags) < 0)
+	syslog(LOG_WARNING, "Couldn't restore device fd flags: %m");
+    initfdflags = -1;
+
+    /* Restore old line discipline. */
+    if (initdisc >= 0 && ioctl(fd, TIOCSETD, &initdisc) < 0)
+	syslog(LOG_ERR, "ioctl(TIOCSETD): %m");
+    initdisc = -1;
+}
+
+/*
+ * Check whether the link seems not to be 8-bit clean.
+ */
+void
+clean_check()
 {
     int x;
     char *s;
 
-    if (initdisc >= 0) {
-	/*
-	 * Check whether the link seems not to be 8-bit clean.
-	 */
-	if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) == 0) {
-	    s = NULL;
-	    switch (~x & (SC_RCV_B7_0|SC_RCV_B7_1|SC_RCV_EVNP|SC_RCV_ODDP)) {
-	    case SC_RCV_B7_0:
-		s = "bit 7 set to 1";
-		break;
-	    case SC_RCV_B7_1:
-		s = "bit 7 set to 0";
-		break;
-	    case SC_RCV_EVNP:
-		s = "odd parity";
-		break;
-	    case SC_RCV_ODDP:
-		s = "even parity";
-		break;
-	    }
-	    if (s != NULL) {
-		syslog(LOG_WARNING, "Serial link is not 8-bit clean:");
-		syslog(LOG_WARNING, "All received characters had %s", s);
-	    }
+    if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &x) == 0) {
+	s = NULL;
+	switch (~x & (SC_RCV_B7_0|SC_RCV_B7_1|SC_RCV_EVNP|SC_RCV_ODDP)) {
+	case SC_RCV_B7_0:
+	    s = "bit 7 set to 1";
+	    break;
+	case SC_RCV_B7_1:
+	    s = "bit 7 set to 0";
+	    break;
+	case SC_RCV_EVNP:
+	    s = "odd parity";
+	    break;
+	case SC_RCV_ODDP:
+	    s = "even parity";
+	    break;
+	}
+	if (s != NULL) {
+	    syslog(LOG_WARNING, "Serial link is not 8-bit clean:");
+	    syslog(LOG_WARNING, "All received characters had %s", s);
 	}
-	if (ioctl(fd, TIOCSETD, &initdisc) < 0)
-	    syslog(LOG_ERR, "ioctl(disestablish TIOCSETD): %m");
     }
 }
 
@@ -281,6 +349,12 @@ struct speed {
 #ifdef B57600
     { 57600, B57600 },
 #endif
+/*
+#ifndef B115200
+#warning Defining B115200
+#define B115200 20
+#endif
+*/
 #ifdef B115200
     { 115200, B115200 },
 #endif
@@ -308,7 +382,7 @@ translate_speed(bps)
 /*
  * Translate from a speed_t to bits/second.
  */
-int
+static int
 baud_rate_of(speed)
     int speed;
 {
@@ -328,6 +402,7 @@ baud_rate_of(speed)
  * at the requested speed, etc.  If `local' is true, set CLOCAL
  * regardless of whether the modem option was specified.
  */
+void
 set_up_tty(fd, local)
     int fd, local;
 {
@@ -347,14 +422,15 @@ set_up_tty(fd, local)
     tios.c_cflag |= CS8 | CREAD | HUPCL;
     if (local || !modem)
 	tios.c_cflag |= CLOCAL;
+
     tios.c_iflag = IGNBRK | IGNPAR;
     tios.c_oflag = 0;
     tios.c_lflag = 0;
     tios.c_cc[VMIN] = 1;
     tios.c_cc[VTIME] = 0;
 
-    if (crtscts == 2) {
-	tios.c_iflag |= IXOFF;
+    if (crtscts == -2) {
+	tios.c_iflag |= IXON | IXOFF;
 	tios.c_cc[VSTOP] = 0x13;	/* DC3 = XOFF = ^S */
 	tios.c_cc[VSTART] = 0x11;	/* DC1 = XON  = ^Q */
     }
@@ -365,6 +441,15 @@ set_up_tty(fd, local)
 	cfsetispeed(&tios, speed);
     } else {
 	speed = cfgetospeed(&tios);
+	/*
+	 * We can't proceed if the serial port speed is B0,
+	 * since that implies that the serial port is disabled.
+	 */
+	if (speed == B0) {
+	    syslog(LOG_ERR, "Baud rate for %s is 0; need explicit baud rate",
+		   devnam);
+	    die(1);
+	}
     }
 
     if (modem) {
@@ -386,7 +471,8 @@ set_up_tty(fd, local)
  * restore_tty - restore the terminal to the saved settings.
  */
 void
-restore_tty()
+restore_tty(fd)
+    int fd;
 {
     if (restore_term) {
 	if (tcsetattr(fd, TCSAFLUSH, &inittermios) < 0)
@@ -405,6 +491,7 @@ restore_tty()
  * NXFax's capability to determine port usage.
  *
  */
+void
 setdtr(fd, on)
 int fd, on;
 {
@@ -430,23 +517,27 @@ output(unit, p, len)
     u_char *p;
     int len;
 {
-    if (unit != 0)
-	MAINDEBUG((LOG_WARNING, "output: unit != 0!"));
     if (debug)
-	log_packet(p, len, "sent ");
+	log_packet(p, len, "sent ", LOG_DEBUG);
 
-    if (write(fd, p, len) < 0) {
-	syslog(LOG_ERR, "write: %m");
-	die(1);
+    if (write(ttyfd, p, len) < 0) {
+	if (errno == EWOULDBLOCK || errno == ENOBUFS
+	    || errno == ENXIO || errno == EIO) {
+	    syslog(LOG_WARNING, "write: warning: %m");
+	} else {
+	    syslog(LOG_ERR, "write: %m");
+	    die(1);
+	}
     }
 }
 
 
 /*
- * wait_input - wait until there is data available on fd,
+ * wait_input - wait until there is data available on ttyfd,
  * for the length of time specified by *timo (indefinite
  * if timo is NULL).
  */
+void
 wait_input(timo)
     struct timeval *timo;
 {
@@ -454,8 +545,8 @@ wait_input(timo)
     int n;
 
     FD_ZERO(&ready);
-    FD_SET(fd, &ready);
-    n = select(fd+1, &ready, NULL, &ready, timo);
+    FD_SET(ttyfd, &ready);
+    n = select(ttyfd+1, &ready, NULL, &ready, timo);
     if (n < 0 && errno != EINTR) {
 	syslog(LOG_ERR, "select: %m");
 	die(1);
@@ -472,12 +563,12 @@ read_packet(buf)
 {
     int len;
 
-    if ((len = read(fd, buf, PPP_MTU + PPP_HDRLEN)) < 0) {
+    if ((len = read(ttyfd, buf, PPP_MTU + PPP_HDRLEN)) < 0) {
 	if (errno == EWOULDBLOCK || errno == EINTR) {
-	    MAINDEBUG((LOG_DEBUG, "read(fd): %m"));
+	    MAINDEBUG((LOG_DEBUG, "read: %m"));
 	    return -1;
 	}
-	syslog(LOG_ERR, "read(fd): %m");
+	syslog(LOG_ERR, "read: %m");
 	die(1);
     }
     return len;
@@ -504,18 +595,18 @@ ppp_send_config(unit, mtu, asyncmap, pcomp, accomp)
 	quit();
     }
 
-    if (ioctl(fd, PPPIOCSASYNCMAP, (caddr_t) &asyncmap) < 0) {
+    if (ioctl(ttyfd, PPPIOCSASYNCMAP, (caddr_t) &asyncmap) < 0) {
 	syslog(LOG_ERR, "ioctl(PPPIOCSASYNCMAP): %m");
 	quit();
     }
 
-    if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
+    if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
 	syslog(LOG_ERR, "ioctl(PPPIOCGFLAGS): %m");
 	quit();
     }
     x = pcomp? x | SC_COMP_PROT: x &~ SC_COMP_PROT;
     x = accomp? x | SC_COMP_AC: x &~ SC_COMP_AC;
-    if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
+    if (ioctl(ttyfd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
 	syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
 	quit();
     }
@@ -530,7 +621,7 @@ ppp_set_xaccm(unit, accm)
     int unit;
     ext_accm accm;
 {
-    if (ioctl(fd, PPPIOCSXASYNCMAP, accm) < 0 && errno != ENOTTY)
+    if (ioctl(ttyfd, PPPIOCSXASYNCMAP, accm) < 0 && errno != ENOTTY)
 	syslog(LOG_WARNING, "ioctl(PPPIOCSXASYNCMAP): %m");
 }
 
@@ -547,20 +638,20 @@ ppp_recv_config(unit, mru, asyncmap, pcomp, accomp)
 {
     int x;
 
-    if (ioctl(fd, PPPIOCSMRU, (caddr_t) &mru) < 0) {
+    if (ioctl(ttyfd, PPPIOCSMRU, (caddr_t) &mru) < 0) {
 	syslog(LOG_ERR, "ioctl(PPPIOCSMRU): %m");
 	quit();
     }
-    if (ioctl(fd, PPPIOCSRASYNCMAP, (caddr_t) &asyncmap) < 0) {
+    if (ioctl(ttyfd, PPPIOCSRASYNCMAP, (caddr_t) &asyncmap) < 0) {
 	syslog(LOG_ERR, "ioctl(PPPIOCSRASYNCMAP): %m");
 	quit();
     }
-    if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
+    if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
 	syslog(LOG_ERR, "ioctl(PPPIOCGFLAGS): %m");
 	quit();
     }
     x = !accomp? x | SC_REJ_COMP_AC: x &~ SC_REJ_COMP_AC;
-    if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
+    if (ioctl(ttyfd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
 	syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
 	quit();
     }
@@ -570,6 +661,7 @@ ppp_recv_config(unit, mru, asyncmap, pcomp, accomp)
  * ccp_test - ask kernel whether a given compression method
  * is acceptable for use.
  */
+int
 ccp_test(unit, opt_ptr, opt_len, for_transmit)
     int unit, opt_len, for_transmit;
     u_char *opt_ptr;
@@ -579,7 +671,9 @@ ccp_test(unit, opt_ptr, opt_len, for_transmit)
     data.ptr = opt_ptr;
     data.length = opt_len;
     data.transmit = for_transmit;
-    return ioctl(fd, PPPIOCSCOMPRESS, (caddr_t) &data) >= 0;
+    if (ioctl(ttyfd, PPPIOCSCOMPRESS, (caddr_t) &data) >= 0)
+	return 1;
+    return (errno == ENOBUFS)? 0: -1;
 }
 
 /*
@@ -591,13 +685,13 @@ ccp_flags_set(unit, isopen, isup)
 {
     int x;
 
-    if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
+    if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
 	syslog(LOG_ERR, "ioctl(PPPIOCGFLAGS): %m");
 	return;
     }
     x = isopen? x | SC_CCP_OPEN: x &~ SC_CCP_OPEN;
     x = isup? x | SC_CCP_UP: x &~ SC_CCP_UP;
-    if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
+    if (ioctl(ttyfd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
 	syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
 }
 
@@ -612,7 +706,7 @@ ccp_fatal_error(unit)
 {
     int x;
 
-    if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
+    if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
 	syslog(LOG_ERR, "ioctl(PPPIOCGFLAGS): %m");
 	return 0;
     }
@@ -628,17 +722,17 @@ sifvjcomp(u, vjcomp, cidcomp, maxcid)
 {
     u_int x;
 
-    if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
+    if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
 	syslog(LOG_ERR, "ioctl(PPIOCGFLAGS): %m");
 	return 0;
     }
     x = vjcomp ? x | SC_COMP_TCP: x &~ SC_COMP_TCP;
     x = cidcomp? x & ~SC_NO_TCP_CCID: x | SC_NO_TCP_CCID;
-    if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
+    if (ioctl(ttyfd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
 	syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
 	return 0;
     }
-    if (ioctl(fd, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0) {
+    if (ioctl(ttyfd, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0) {
 	syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
 	return 0;
     }
@@ -670,20 +764,21 @@ sifup(u)
 	syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
 	return 0;
     }
+    if_is_up = 1;
     npi.protocol = PPP_IP;
     npi.mode = NPMODE_PASS;
-    if (ioctl(fd, PPPIOCSNPMODE, &npi) < 0) {
+    if (ioctl(ttyfd, PPPIOCSNPMODE, &npi) < 0) {
 	if (errno != ENOTTY) {
 	    syslog(LOG_ERR, "ioctl(PPPIOCSNPMODE): %m");
 	    return 0;
 	}
 	/* for backwards compatibility */
-	if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
+	if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
 	    syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m");
 	    return 0;
 	}
 	x |= SC_ENABLE_IP;
-	if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
+	if (ioctl(ttyfd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
 	    syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
 	    return 0;
 	}
@@ -706,24 +801,9 @@ sifdown(u)
     rv = 1;
     npi.protocol = PPP_IP;
     npi.mode = NPMODE_ERROR;
-    if (ioctl(fd, PPPIOCSNPMODE, (caddr_t) &npi) < 0) {
-	if (errno != ENOTTY) {
-	    syslog(LOG_ERR, "ioctl(PPPIOCSNPMODE): %m");
-	    rv = 0;
-	} else {
-	    /* backwards compatibility */
-	    if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
-		syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m");
-		rv = 0;
-	    } else {
-		x &= ~SC_ENABLE_IP;
-		if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
-		    syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
-		    rv = 0;
-		}
-	    }
-	}
-    }
+    ioctl(ttyfd, PPPIOCSNPMODE, (caddr_t) &npi);
+    /* ignore errors, because ttyfd might have been closed by now. */
+
 
     strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
     if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
@@ -734,7 +814,8 @@ sifdown(u)
 	if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
 	    syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
 	    rv = 0;
-	}
+	} else
+	    if_is_up = 0;
     }
     return rv;
 }
@@ -817,9 +898,9 @@ cifaddr(u, o, h)
  * sifdefaultroute - assign a default route through the address given.
  */
 int
-sifdefaultroute(u, g)
+sifdefaultroute(u, l, g)
     int u;
-    u_int32_t g;
+    u_int32_t l, g;
 {
     return dodefaultroute(g, 's');
 }
@@ -828,9 +909,9 @@ sifdefaultroute(u, g)
  * cifdefaultroute - delete a default route through the address given.
  */
 int
-cifdefaultroute(u, g)
+cifdefaultroute(u, l, g)
     int u;
-    u_int32_t g;
+    u_int32_t l, g;
 {
     return dodefaultroute(g, 'c');
 }
@@ -855,6 +936,7 @@ dodefaultroute(g, cmd)
 	       (cmd == 's') ? "SIOCADDRT" : "SIOCDELRT");
 	return 0;
     }
+    default_route_gateway = (cmd == 's')? g: 0;
     return 1;
 }
 
@@ -887,6 +969,7 @@ sifproxyarp(unit, hisaddr)
 	return 0;
     }
 
+    proxy_arp_addr = hisaddr;
     return 1;
 }
 
@@ -907,6 +990,7 @@ cifproxyarp(unit, hisaddr)
 	syslog(LOG_WARNING, "ioctl(SIOCDARP): %m");
 	return 0;
     }
+    proxy_arp_addr = 0;
     return 1;
 }
 
@@ -989,7 +1073,7 @@ get_ether_addr(ipaddr, hwaddr)
     return 1;
 }
 
-int
+static int
 ether_by_host(hostname, etherptr)
     char *hostname;
     struct ether_addr *etherptr;
@@ -1153,9 +1237,9 @@ strdup(s)
 
 #define WTMPFILE        "/usr/adm/wtmp"
 
-int
+void
 logwtmp(line, name, host)
-    char *line, *name, *host;
+    const char *line, *name, *host;
 {
     int fd;
     struct stat buf;
@@ -1349,3 +1433,247 @@ int sigaction(int sig, const struct sigaction *act, struct sigaction *oact)
 }
 
 #endif
+
+
+/*
+ * Code following is added for 2.3 compatibility
+ */
+
+/*
+ * get_idle_time - return how long the link has been idle.
+ */
+int
+get_idle_time(u, ip)
+    int u;
+    struct ppp_idle *ip;
+{
+  return (ioctl(ttyfd, PPPIOCGIDLE, ip) >= 0); 
+}
+
+
+/*
+ * get_loop_output - read characters from the loopback, form them
+ * into frames, and detect when we want to bring the real link up.
+ * Return value is 1 if we need to bring up the link, 0 otherwise.
+ */
+int
+get_loop_output()
+{
+
+#if 0
+    int rv = 0;
+    int n;
+
+    while ((n = read(loop_master, inbuf, sizeof(inbuf))) >= 0) {
+	if (loop_chars(inbuf, n))
+	    rv = 1;
+    }
+
+    if (n == 0) {
+	syslog(LOG_ERR, "eof on loopback");
+	die(1);
+    } else if (errno != EWOULDBLOCK){
+	syslog(LOG_ERR, "read from loopback: %m");
+	die(1);
+    }
+
+    return rv;
+#endif
+
+    return 0;
+}
+
+/*
+ * sifnpmode - Set the mode for handling packets for a given NP.
+ */
+int
+sifnpmode(u, proto, mode)
+    int u;
+    int proto;
+    enum NPmode mode;
+{
+    struct npioctl npi;
+
+    npi.protocol = proto;
+    npi.mode = mode;
+    if (ioctl(ttyfd, PPPIOCSNPMODE, &npi) < 0) {
+	syslog(LOG_ERR, "ioctl(set NP %d mode to %d): %m", proto, mode);
+	return 0;
+    }
+    return 1;
+}
+
+
+/*
+ * open_ppp_loopback - open the device we use for getting
+ * packets in demand mode, and connect it to a ppp interface.
+ * Here we use a pty.
+ */
+void
+open_ppp_loopback()
+{
+
+#if 0
+    int flags;
+    struct termios tios;
+    int pppdisc = PPPDISC;
+
+    syslog(LOG_ERR, "open_ppp_loopback called!");
+    die(1);
+
+    if (openpty(&loop_master, &loop_slave, loop_name, NULL, NULL) < 0) {
+	syslog(LOG_ERR, "No free pty for loopback");
+	die(1);
+    }
+    SYSDEBUG((LOG_DEBUG, "using %s for loopback", loop_name));
+
+    if (tcgetattr(loop_slave, &tios) == 0) {
+	tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB);
+	tios.c_cflag |= CS8 | CREAD;
+	tios.c_iflag = IGNPAR;
+	tios.c_oflag = 0;
+	tios.c_lflag = 0;
+	if (tcsetattr(loop_slave, TCSAFLUSH, &tios) < 0)
+	    syslog(LOG_WARNING, "couldn't set attributes on loopback: %m");
+    }
+
+    if ((flags = fcntl(loop_master, F_GETFL)) != -1) 
+	if (fcntl(loop_master, F_SETFL, flags | O_NONBLOCK) == -1)
+	    syslog(LOG_WARNING, "couldn't set loopback to nonblock: %m");
+
+    ttyfd = loop_slave;
+    if (ioctl(ttyfd, TIOCSETD, &pppdisc) < 0) {
+	syslog(LOG_ERR, "ioctl(TIOCSETD): %m");
+	die(1);
+    }
+
+    /*
+     * Find out which interface we were given.
+     */
+    if (ioctl(ttyfd, PPPIOCGUNIT, &ifunit) < 0) {	
+	syslog(LOG_ERR, "ioctl(PPPIOCGUNIT): %m");
+	die(1);
+    }
+
+    /*
+     * Enable debug in the driver if requested.
+     */
+    if (kdebugflag) {
+	if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &flags) < 0) {
+	    syslog(LOG_WARNING, "ioctl (PPPIOCGFLAGS): %m");
+	} else {
+	    flags |= (kdebugflag & 0xFF) * SC_DEBUG;
+	    if (ioctl(ttyfd, PPPIOCSFLAGS, (caddr_t) &flags) < 0)
+		syslog(LOG_WARNING, "ioctl(PPPIOCSFLAGS): %m");
+	}
+    }
+
+#endif
+
+}
+
+/*
+ * restore_loop - reattach the ppp unit to the loopback.
+ */
+void
+restore_loop()
+{
+    int x;
+
+    /*
+     * Transfer the ppp interface back to the loopback.
+     */
+    if (ioctl(ttyfd, PPPIOCXFERUNIT, 0) < 0) {
+	syslog(LOG_ERR, "ioctl(transfer ppp unit): %m");
+	die(1);
+    }
+    x = PPPDISC;
+    if (ioctl(loop_slave, TIOCSETD, &x) < 0) {
+	syslog(LOG_ERR, "ioctl(TIOCSETD): %m");
+	die(1);
+    }
+
+    /*
+     * Check that we got the same unit again.
+     */
+    if (ioctl(loop_slave, PPPIOCGUNIT, &x) < 0) {	
+	syslog(LOG_ERR, "ioctl(PPPIOCGUNIT): %m");
+	die(1);
+    }
+    if (x != ifunit) {
+	syslog(LOG_ERR, "transfer_ppp failed: wanted unit %d, got %d",
+	       ifunit, x);
+	die(1);
+    }
+    ttyfd = loop_slave;
+}
+
+
+/*
+ * sys_check_options - check the options that the user specified
+ */
+void
+sys_check_options()
+{
+  /*
+   * We don't support demand dialing yet.
+   */
+  if(demand)
+    {
+      syslog(LOG_WARNING, "PPP-2.3 for NeXTSTEP does not yet support demand dialing\n");
+      demand = 0;
+    }
+}
+
+
+/*
+ * sys_close - Clean up in a child process before execing.
+ */
+void
+sys_close()
+{
+    close(sockfd);
+    if (loop_slave >= 0) {
+	close(loop_slave);
+	close(loop_master);
+    }
+    closelog();
+}
+
+
+/*
+ * wait_loop_output - wait until there is data available on the
+ * loopback, for the length of time specified by *timo (indefinite
+ * if timo is NULL).
+ */
+void wait_loop_output(timo)
+    struct timeval *timo;
+{
+    fd_set ready;
+    int n;
+
+    FD_ZERO(&ready);
+    FD_SET(loop_master, &ready);
+    n = select(loop_master + 1, &ready, NULL, &ready, timo);
+    if (n < 0 && errno != EINTR) {
+	syslog(LOG_ERR, "select: %m");
+	die(1);
+    }
+}
+
+
+/*
+ * wait_time - wait for a given length of time or until a
+ * signal is received.
+ */
+void wait_time(timo)
+    struct timeval *timo;
+{
+    int n;
+
+    n = select(0, NULL, NULL, NULL, timo);
+    if (n < 0 && errno != EINTR) {
+	syslog(LOG_ERR, "select: %m");
+	die(1);
+    }
+}