* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
-/*
- * TODO:
- */
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/time.h>
+#include <sys/errno.h>
+#include <sys/file.h>
+#include <sys/stat.h>
+#include <sys/utsname.h>
#include <stdio.h>
+#include <stdlib.h>
#include <syslog.h>
#include <string.h>
#include <time.h>
#include <memory.h>
#include <utmp.h>
-#include <sys/ioctl.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <sys/time.h>
-#include <sys/errno.h>
#include <mntent.h>
+#include <signal.h>
+#include <fcntl.h>
+#include <ctype.h>
+#include <termios.h>
+#include <unistd.h>
+
+/* This is in netdevice.h. However, this compile will fail miserably if
+ you attempt to include netdevice.h because it has so many references
+ to __memcpy functions which it should not attempt to do. So, since I
+ really don't use it, but it must be defined, define it now. */
+
+#ifndef MAX_ADDR_LEN
+#define MAX_ADDR_LEN 7
+#endif
+#if __GLIBC__ >= 2
+#include <asm/types.h> /* glibc 2 conflicts with linux/types.h */
#include <net/if.h>
-#include <net/ppp_defs.h>
#include <net/if_arp.h>
-#include <linux/ppp.h>
+#include <net/route.h>
+#include <netinet/if_ether.h>
+#else
+#include <linux/types.h>
+#include <linux/if.h>
+#include <linux/if_arp.h>
#include <linux/route.h>
#include <linux/if_ether.h>
+#endif
#include <netinet/in.h>
-#include <signal.h>
+#include <arpa/inet.h>
+
+#include <linux/ppp_defs.h>
+#include <linux/if_ppp.h>
#include "pppd.h"
#include "fsm.h"
#include "ipcp.h"
+#include "patchlevel.h"
+
+#ifdef IPX_CHANGE
+#include "ipxcp.h"
+#if __GLIBC__ >= 2 && \
+ !(defined(__powerpc__) && __GLIBC__ == 2 && __GLIBC_MINOR__ == 0)
+#include <netipx/ipx.h>
+#else
+#include <linux/ipx.h>
+#endif
+#endif /* IPX_CHANGE */
-static int initdisc = -1; /* Initial TTY discipline */
-static int prev_kdebugflag = 0;
+#ifdef LOCKLIB
+#include <sys/locks.h>
+#endif
-static int restore_term; /* 1 => we've munged the terminal */
-static struct termios inittermios; /* Initial TTY termios */
+#ifndef RTF_DEFAULT /* Normally in <linux/route.h> from <net/route.h> */
+#define RTF_DEFAULT 0
+#endif
-static int driver_version = 0;
+/* We can get an EIO error on an ioctl if the modem has hung up */
+#define ok_error(num) ((num)==EIO)
+
+static int tty_disc = N_TTY; /* The TTY discipline */
+static int ppp_disc = N_PPP; /* The PPP discpline */
+static int initfdflags = -1; /* Initial file descriptor flags for fd */
+static int ppp_fd = -1; /* fd which is set to PPP discipline */
+static int sock_fd = -1; /* socket for doing interface ioctls */
+static int slave_fd = -1;
+static int master_fd = -1;
+static int ppp_dev_fd = -1; /* fd for /dev/ppp (new style driver) */
+
+static fd_set in_fds; /* set of fds that wait_input waits for */
+static int max_in_fd; /* highest fd set in in_fds */
+
+static int has_proxy_arp = 0;
+static int driver_version = 0;
static int driver_modification = 0;
-static int driver_patch = 0;
+static int driver_patch = 0;
+static int driver_is_old = 0;
+static int restore_term = 0; /* 1 => we've munged the terminal */
+static struct termios inittermios; /* Initial TTY termios */
+
+static int new_style_driver = 0;
+
+static char loop_name[20];
+static unsigned char inbuf[512]; /* buffer for chars read from loopback */
+
+static int if_is_up; /* Interface has been marked up */
+static u_int32_t default_route_gateway; /* Gateway for default route added */
+static u_int32_t proxy_arp_addr; /* Addr for proxy arp entry added */
+static char proxy_arp_dev[16]; /* Device for proxy arp entry */
+
+static struct utsname utsname; /* for the kernel version */
+static int kernel_version;
+#define KVERSION(j,n,p) ((j)*1000000 + (n)*1000 + (p))
-#define MAX_IFS 32
+#define MAX_IFS 100
+
+#define FLAGS_GOOD (IFF_UP | IFF_BROADCAST)
+#define FLAGS_MASK (IFF_UP | IFF_BROADCAST | \
+ IFF_POINTOPOINT | IFF_LOOPBACK | IFF_NOARP)
+
+/* Prototypes for procedures local to this file. */
+static int get_flags (int fd);
+static void set_flags (int fd, int flags);
+static int translate_speed (int bps);
+static int baud_rate_of (int speed);
+static char *path_to_route (void);
+static void close_route_table (void);
+static int open_route_table (void);
+static int read_route_table (struct rtentry *rt);
+static int defaultroute_exists (struct rtentry *rt);
+static int get_ether_addr (u_int32_t ipaddr, struct sockaddr *hwaddr,
+ char *name, int namelen);
+static void decode_version (char *buf, int *version, int *mod, int *patch);
+static int set_kdebugflag(int level);
+static int ppp_registered(void);
+
+extern u_char inpacket_buf[]; /* borrowed from main.c */
/*
* SET_SA_FAMILY - set the sa_family field of a struct sockaddr,
addr.sa_family = (family);
/*
+ * Determine if the PPP connection should still be present.
+ */
+
+extern int hungup;
+
+/* new_fd is the fd of a tty */
+static void set_ppp_fd (int new_fd)
+{
+ SYSDEBUG ((LOG_DEBUG, "setting ppp_fd to %d\n", new_fd));
+ ppp_fd = new_fd;
+ if (!new_style_driver)
+ ppp_dev_fd = new_fd;
+}
+
+static int still_ppp(void)
+{
+ if (new_style_driver)
+ return 1;
+ if (!hungup || ppp_fd == slave_fd)
+ return 1;
+ if (slave_fd >= 0) {
+ set_ppp_fd(slave_fd);
+ return 1;
+ }
+ return 0;
+}
+
+/********************************************************************
+ *
+ * Functions to read and set the flags value in the device driver
+ */
+
+static int get_flags (int fd)
+{
+ int flags;
+
+ if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &flags) < 0) {
+ if ( ok_error (errno) )
+ flags = 0;
+ else
+ fatal("ioctl(PPPIOCGFLAGS): %m");
+ }
+
+ SYSDEBUG ((LOG_DEBUG, "get flags = %x\n", flags));
+ return flags;
+}
+
+/********************************************************************/
+
+static void set_flags (int fd, int flags)
+{
+ SYSDEBUG ((LOG_DEBUG, "set flags = %x\n", flags));
+
+ if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &flags) < 0) {
+ if (! ok_error (errno) )
+ fatal("ioctl(PPPIOCSFLAGS, %x): %m", flags, errno);
+ }
+}
+
+/********************************************************************
+ *
* sys_init - System-dependent initialization.
*/
-void
-sys_init()
+
+void sys_init(void)
{
+ int osmaj, osmin, ospatch;
+ int flags;
+
openlog("pppd", LOG_PID | LOG_NDELAY, LOG_PPP);
setlogmask(LOG_UPTO(LOG_INFO));
if (debug)
setlogmask(LOG_UPTO(LOG_DEBUG));
+
+ if (new_style_driver) {
+ ppp_dev_fd = open("/dev/ppp", O_RDWR);
+ if (ppp_dev_fd < 0)
+ fatal("Couldn't open /dev/ppp: %m");
+ flags = fcntl(ppp_dev_fd, F_GETFL);
+ if (flags == -1
+ || fcntl(ppp_dev_fd, F_SETFL, flags | O_NONBLOCK) == -1)
+ warn("Couldn't set /dev/ppp to nonblock: %m");
+ }
+
+ /* Get an internet socket for doing socket ioctls. */
+ sock_fd = socket(AF_INET, SOCK_DGRAM, 0);
+ if (sock_fd < 0) {
+ if ( ! ok_error ( errno ))
+ fatal("Couldn't create IP socket: %m(%d)", errno);
+ }
+
+ FD_ZERO(&in_fds);
+ max_in_fd = 0;
+
+ uname(&utsname);
+ osmaj = osmin = ospatch = 0;
+ sscanf(utsname.release, "%d.%d.%d", &osmaj, &osmin, &ospatch);
+ kernel_version = KVERSION(osmaj, osmin, ospatch);
}
+/********************************************************************
+ *
+ * sys_cleanup - restore any system state we modified before exiting:
+ * mark the interface down, delete default route and/or proxy arp entry.
+ * This shouldn't call die() because it's called from die().
+ */
+
+void sys_cleanup(void)
+{
+/*
+ * Take down the device
+ */
+ if (if_is_up)
+ sifdown(0);
/*
- * note_debug_level - note a change in the debug level.
+ * Delete any routes through the device.
+ */
+ if (default_route_gateway != 0)
+ cifdefaultroute(0, 0, default_route_gateway);
+
+ if (has_proxy_arp)
+ cifproxyarp(0, proxy_arp_addr);
+}
+
+/********************************************************************
+ *
+ * sys_close - Clean up in a child process before execing.
*/
void
-note_debug_level()
+sys_close(void)
{
- if (debug) {
- syslog(LOG_INFO, "Debug turned ON, Level %d", debug);
- setlogmask(LOG_UPTO(LOG_DEBUG));
- } else {
- setlogmask(LOG_UPTO(LOG_WARNING));
- }
+ if (new_style_driver)
+ close(ppp_dev_fd);
+ if (sock_fd >= 0)
+ close(sock_fd);
+ if (slave_fd >= 0)
+ close(slave_fd);
+ if (master_fd >= 0)
+ close(master_fd);
+ closelog();
}
-/*
+/********************************************************************
+ *
* set_kdebugflag - Define the debugging level for the kernel
*/
-int set_kdebugflag (int requested_level)
+static int set_kdebugflag (int requested_level)
{
- if (ioctl(fd, PPPIOCGDEBUG, &prev_kdebugflag) < 0) {
- syslog(LOG_ERR, "ioctl(PPPIOCGDEBUG): %m");
+ if (ioctl(ppp_dev_fd, PPPIOCSDEBUG, &requested_level) < 0) {
+ if ( ! ok_error (errno) )
+ error("ioctl(PPPIOCSDEBUG): %m");
return (0);
}
-
- if (prev_kdebugflag != requested_level) {
- if (ioctl(fd, PPPIOCSDEBUG, &requested_level) < 0) {
- syslog (LOG_ERR, "ioctl(PPPIOCSDEBUG): %m");
- return (0);
- }
- syslog(LOG_INFO, "set kernel debugging level to %d", requested_level);
- }
+ SYSDEBUG ((LOG_INFO, "set kernel debugging level to %d",
+ requested_level));
return (1);
}
-/*
+/********************************************************************
+ *
* establish_ppp - Turn the serial port into a ppp interface.
*/
-void establish_ppp (void)
+int establish_ppp (int tty_fd)
{
- int pppdisc = NUM_PPP;
- int sig = SIGIO;
-
- if (ioctl(fd, TIOCEXCL, 0) < 0) {
- syslog (LOG_WARNING, "ioctl(TIOCEXCL): %m");
- }
+ int x;
- if (ioctl(fd, TIOCGETD, &initdisc) < 0) {
- syslog(LOG_ERR, "ioctl(TIOCGETD): %m");
- die (1);
+/*
+ * The current PPP device will be the tty file.
+ */
+ set_ppp_fd (tty_fd);
+/*
+ * Ensure that the tty device is in exclusive mode.
+ */
+ if (ioctl(tty_fd, TIOCEXCL, 0) < 0) {
+ if ( ! ok_error ( errno ))
+ warn("ioctl(TIOCEXCL): %m");
}
-
- if (ioctl(fd, TIOCSETD, &pppdisc) < 0) {
- syslog(LOG_ERR, "ioctl(TIOCSETD): %m");
- die (1);
+/*
+ * Demand mode - prime the old ppp device to relinquish the unit.
+ */
+ if (!new_style_driver && demand
+ && ioctl(slave_fd, PPPIOCXFERUNIT, 0) < 0)
+ fatal("ioctl(transfer ppp unit): %m(%d)", errno);
+/*
+ * Set the current tty to the PPP discpline
+ */
+ if (ioctl(tty_fd, TIOCSETD, &ppp_disc) < 0) {
+ if ( ! ok_error (errno) )
+ fatal("ioctl(TIOCSETD): %m(%d)", errno);
}
- if (ioctl(fd, PPPIOCGUNIT, &ifunit) < 0) {
- syslog(LOG_ERR, "ioctl(PPPIOCGUNIT): %m");
- die (1);
+/*
+ * Find out which interface we were given.
+ */
+ if (new_style_driver) {
+ if (!demand) {
+ /* allocate ourselves a ppp unit */
+ ifunit = -1;
+ if (ioctl(ppp_dev_fd, PPPIOCNEWUNIT, &ifunit) < 0)
+ fatal("Couldn't create new ppp unit: %m");
+ set_kdebugflag(kdebugflag);
+ } else {
+ set_flags(ppp_dev_fd, get_flags(ppp_dev_fd) & ~SC_LOOP_TRAFFIC);
+ }
+ if (ioctl(tty_fd, PPPIOCATTACH, &ifunit) < 0) {
+ if (errno == EIO)
+ return -1;
+ fatal("Couldn't attach tty to PPP unit %d: %m", ifunit);
+ }
+ } else {
+ if (ioctl(tty_fd, PPPIOCGUNIT, &x) < 0) {
+ if ( ! ok_error (errno))
+ fatal("ioctl(PPPIOCGUNIT): %m(%d)", errno);
+ }
+ /* Check that we got the same unit again. */
+ if (demand && x != ifunit)
+ fatal("transfer_ppp failed: wanted unit %d, got %d", ifunit, x);
+ ifunit = x;
}
- set_kdebugflag (kdebugflag);
+/*
+ * Enable debug in the driver if requested.
+ */
+ if (!demand)
+ set_kdebugflag (kdebugflag);
- syslog (LOG_NOTICE, "Using version %d.%d.%d of PPP driver",
- driver_version, driver_modification, driver_patch);
-}
+ set_flags(tty_fd, get_flags(tty_fd) & ~(SC_RCV_B7_0 | SC_RCV_B7_1 |
+ SC_RCV_EVNP | SC_RCV_ODDP));
+
+ SYSDEBUG ((LOG_NOTICE, "Using version %d.%d.%d of PPP driver",
+ driver_version, driver_modification, driver_patch));
/*
+ * Fetch the initial file flags and reset blocking mode on the file.
+ */
+ initfdflags = fcntl(tty_fd, F_GETFL);
+ if (initfdflags == -1 ||
+ fcntl(tty_fd, F_SETFL, initfdflags | O_NONBLOCK) == -1) {
+ if ( ! ok_error (errno))
+ warn("Couldn't set device to non-blocking mode: %m");
+ }
+
+ return ppp_dev_fd;
+}
+
+/********************************************************************
+ *
* disestablish_ppp - Restore the serial port to normal operation.
* This shouldn't call die() because it's called from die().
*/
-void disestablish_ppp(void)
+void disestablish_ppp(int tty_fd)
+{
+ if (!hungup) {
+/*
+ * Flush the tty output buffer so that the TIOCSETD doesn't hang.
+ */
+ if (tcflush(tty_fd, TCIOFLUSH) < 0)
+ warn("tcflush failed: %m");
+/*
+ * Restore the previous line discipline
+ */
+ if (ioctl(tty_fd, TIOCSETD, &tty_disc) < 0) {
+ if ( ! ok_error (errno))
+ error("ioctl(TIOCSETD, N_TTY): %m");
+ }
+
+ if (ioctl(tty_fd, TIOCNXCL, 0) < 0) {
+ if ( ! ok_error (errno))
+ warn("ioctl(TIOCNXCL): %m(%d)", errno);
+ }
+
+ /* Reset non-blocking mode on fd. */
+ if (initfdflags != -1 && fcntl(tty_fd, F_SETFL, initfdflags) < 0) {
+ if ( ! ok_error (errno))
+ warn("Couldn't restore device fd flags: %m");
+ }
+ }
+ initfdflags = -1;
+}
+
+/********************************************************************
+ *
+ * clean_check - Fetch the flags for the device and generate
+ * appropriate error messages.
+ */
+void clean_check(void)
{
int x;
char *s;
- if (initdisc >= 0) {
- set_kdebugflag (prev_kdebugflag);
- /*
- * Check whether the link seems not to be 8-bit clean.
- */
- if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) == 0) {
+ if (still_ppp()) {
+ if (ioctl(ppp_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";
+ s = "all had bit 7 set to 1";
break;
+
case SC_RCV_B7_1:
- s = "bit 7 set to 0";
+ s = "all had bit 7 set to 0";
break;
+
case SC_RCV_EVNP:
- s = "odd parity";
+ s = "all had odd parity";
break;
+
case SC_RCV_ODDP:
- s = "even parity";
+ s = "all had 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);
+ warn("Receive serial link is not 8-bit clean:");
+ warn("Problem: %s", s);
}
}
-
- if (ioctl(fd, TIOCSETD, &initdisc) < 0)
- syslog(LOG_ERR, "ioctl(TIOCSETD): %m");
-
- if (ioctl(fd, TIOCNXCL, 0) < 0)
- syslog (LOG_WARNING, "ioctl(TIOCNXCL): %m");
-
- initdisc = -1;
}
}
+
-#if B9600 == 9600
-/*
- * XXX assume speed_t values numerically equal bits per second
- * (so we can ask for any speed).
- */
-#define translate_speed(bps) (bps)
-#define baud_rate_of(speed) (speed)
-
-#else
/*
* List of valid speeds.
*/
+
struct speed {
int speed_int, speed_val;
} speeds[] = {
#ifdef B38400
{ 38400, B38400 },
#endif
+#ifdef B57600
+ { 57600, B57600 },
+#endif
+#ifdef B115200
+ { 115200, B115200 },
+#endif
#ifdef EXTA
{ 19200, EXTA },
#endif
#ifdef EXTB
{ 38400, EXTB },
#endif
-#ifdef B57600
- { 57600, B57600 },
+#ifdef B230400
+ { 230400, B230400 },
#endif
-#ifdef B115200
- { 115200, B115200 },
+#ifdef B460800
+ { 460800, B460800 },
#endif
{ 0, 0 }
};
-/*
+/********************************************************************
+ *
* Translate from bits/second to a speed_t.
*/
-int
-translate_speed(bps)
- int bps;
+
+static int translate_speed (int bps)
{
struct speed *speedp;
- if (bps == 0)
- return 0;
- for (speedp = speeds; speedp->speed_int; speedp++)
- if (bps == speedp->speed_int)
- return speedp->speed_val;
- syslog(LOG_WARNING, "speed %d not supported", bps);
+ if (bps != 0) {
+ for (speedp = speeds; speedp->speed_int; speedp++) {
+ if (bps == speedp->speed_int)
+ return speedp->speed_val;
+ }
+ warn("speed %d not supported", bps);
+ }
return 0;
}
-/*
+/********************************************************************
+ *
* Translate from a speed_t to bits/second.
*/
-int
-baud_rate_of(speed)
- int speed;
+
+static int baud_rate_of (int speed)
{
struct speed *speedp;
-
- if (speed == 0)
- return 0;
- for (speedp = speeds; speedp->speed_int; speedp++)
- if (speed == speedp->speed_val)
- return speedp->speed_int;
+
+ if (speed != 0) {
+ for (speedp = speeds; speedp->speed_int; speedp++) {
+ if (speed == speedp->speed_val)
+ return speedp->speed_int;
+ }
+ }
return 0;
}
-#endif
-/*
+/********************************************************************
+ *
* set_up_tty: Set up the serial port on `fd' for 8 bits, no parity,
* at the requested speed, etc. If `local' is true, set CLOCAL
* regardless of whether the modem option was specified.
*/
-set_up_tty(fd, local)
- int fd, local;
+
+void set_up_tty(int tty_fd, int local)
{
- int speed, x;
+ int speed;
struct termios tios;
- if (tcgetattr(fd, &tios) < 0) {
- syslog(LOG_ERR, "tcgetattr: %m");
- die(1);
+ setdtr(tty_fd, 1);
+ if (tcgetattr(tty_fd, &tios) < 0) {
+ if (!ok_error(errno))
+ fatal("tcgetattr: %m(%d)", errno);
+ return;
}
-
+
if (!restore_term)
inittermios = tios;
+
+ tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL);
+ tios.c_cflag |= CS8 | CREAD | HUPCL;
+
+ tios.c_iflag = IGNBRK | IGNPAR;
+ tios.c_oflag = 0;
+ tios.c_lflag = 0;
+ tios.c_cc[VMIN] = 1;
+ tios.c_cc[VTIME] = 0;
+
+ if (local || !modem)
+ tios.c_cflag ^= (CLOCAL | HUPCL);
-#ifdef CRTSCTS
- tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL | CRTSCTS);
- if (crtscts == 1)
+ switch (crtscts) {
+ case 1:
tios.c_cflag |= CRTSCTS;
-#else
- tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL);
-#endif /* CRTSCTS */
+ break;
- 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;
- tios.c_cc[VSTOP] = 0x13; /* DC3 = XOFF = ^S */
+ case -2:
+ tios.c_iflag |= IXON | IXOFF;
+ tios.c_cc[VSTOP] = 0x13; /* DC3 = XOFF = ^S */
tios.c_cc[VSTART] = 0x11; /* DC1 = XON = ^Q */
- }
+ break;
+ case -1:
+ tios.c_cflag &= ~CRTSCTS;
+ break;
+
+ default:
+ break;
+ }
+
speed = translate_speed(inspeed);
if (speed) {
- cfsetospeed(&tios, speed);
- 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);
- }
+ cfsetospeed (&tios, speed);
+ cfsetispeed (&tios, speed);
}
-
- if (tcsetattr(fd, TCSAFLUSH, &tios) < 0) {
- syslog(LOG_ERR, "tcsetattr: %m");
- die(1);
+/*
+ * We can't proceed if the serial port speed is B0,
+ * since that implies that the serial port is disabled.
+ */
+ else {
+ speed = cfgetospeed(&tios);
+ if (speed == B0)
+ fatal("Baud rate for %s is 0; need explicit baud rate", devnam);
}
- baud_rate = baud_rate_of(speed);
- restore_term = TRUE;
+ if (tcsetattr(tty_fd, TCSAFLUSH, &tios) < 0)
+ if (!ok_error(errno))
+ fatal("tcsetattr: %m");
+
+ baud_rate = baud_rate_of(speed);
+ restore_term = 1;
}
-/*
+/********************************************************************
+ *
* setdtr - control the DTR line on the serial port.
* This is called from die(), so it shouldn't call die().
*/
-setdtr(fd, on)
-int fd, on;
+
+void setdtr (int tty_fd, int on)
{
int modembits = TIOCM_DTR;
- ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits);
+ ioctl(tty_fd, (on ? TIOCMBIS : TIOCMBIC), &modembits);
}
-/*
+/********************************************************************
+ *
* restore_tty - restore the terminal to the saved settings.
*/
-void
-restore_tty()
+
+void restore_tty (int tty_fd)
{
if (restore_term) {
- if (tcsetattr(fd, TCSAFLUSH, &inittermios) < 0)
- if (errno != ENXIO)
- syslog(LOG_WARNING, "tcsetattr: %m");
restore_term = 0;
+/*
+ * Turn off echoing, because otherwise we can get into
+ * a loop with the tty and the modem echoing to each other.
+ * We presume we are the sole user of this tty device, so
+ * when we close it, it will revert to its defaults anyway.
+ */
+ if (!default_device)
+ inittermios.c_lflag &= ~(ECHO | ECHONL);
+
+ if (tcsetattr(tty_fd, TCSAFLUSH, &inittermios) < 0) {
+ if (! ok_error (errno))
+ warn("tcsetattr: %m");
+ }
}
}
-/*
+/********************************************************************
+ *
* output - Output PPP packet.
*/
void output (int unit, unsigned char *p, int len)
{
- if (unit != 0)
- MAINDEBUG((LOG_WARNING, "output: unit != 0!"));
-
if (debug)
- log_packet(p, len, "sent ");
-
- if (write(fd, p, len) < 0) {
- syslog(LOG_ERR, "write: %m");
- die(1);
+ dbglog("sent %P", p, len);
+
+ if (len < PPP_HDRLEN)
+ return;
+ if (new_style_driver) {
+ p += 2;
+ len -= 2;
+ }
+ if (write(ppp_dev_fd, p, len) < 0) {
+ if (errno == EWOULDBLOCK || errno == ENOBUFS
+ || errno == ENXIO || errno == EIO || errno == EINTR)
+ warn("write: warning: %m (%d)", errno);
+ else
+ error("write: %m (%d)", errno);
}
}
-/*
- * wait_input - wait until there is data available on fd,
+/********************************************************************
+ *
+ * wait_input - wait until there is data available,
* for the length of time specified by *timo (indefinite
* if timo is NULL).
*/
-wait_input(timo)
- struct timeval *timo;
+
+void wait_input(struct timeval *timo)
{
fd_set ready;
int n;
- FD_ZERO(&ready);
- FD_SET(fd, &ready);
- n = select(fd+1, &ready, NULL, &ready, timo);
- if (n < 0 && errno != EINTR) {
- syslog(LOG_ERR, "select: %m");
- die(1);
- }
+ ready = in_fds;
+ n = select(max_in_fd + 1, &ready, NULL, &ready, timo);
+ if (n < 0 && errno != EINTR)
+ fatal("select: %m(%d)", errno);
}
+/*
+ * add_fd - add an fd to the set that wait_input waits for.
+ */
+void add_fd(int fd)
+{
+ FD_SET(fd, &in_fds);
+ if (fd > max_in_fd)
+ max_in_fd = fd;
+}
/*
+ * remove_fd - remove an fd from the set that wait_input waits for.
+ */
+void remove_fd(int fd)
+{
+ FD_CLR(fd, &in_fds);
+}
+
+
+/********************************************************************
+ *
* read_packet - get a PPP packet from the serial device.
*/
int read_packet (unsigned char *buf)
{
int len;
-
- len = read(fd, buf, PPP_MTU + PPP_HDRLEN);
+
+ len = PPP_MRU + PPP_HDRLEN;
+ if (new_style_driver) {
+ *buf++ = PPP_ALLSTATIONS;
+ *buf++ = PPP_UI;
+ len -= 2;
+ }
+ len = read(ppp_dev_fd, buf, len);
if (len < 0) {
- if (errno == EWOULDBLOCK) {
-#if 0
- MAINDEBUG((LOG_DEBUG, "read(fd): EWOULDBLOCK"));
-#endif
+ if (errno == EWOULDBLOCK || errno == EIO)
return -1;
- }
- syslog(LOG_ERR, "read(fd): %m");
- die(1);
+ fatal("read: %m(%d)", errno);
}
- return len;
+ return new_style_driver? len+2: len;
}
-/*
+/********************************************************************
+ *
+ * get_loop_output - get outgoing packets from the ppp device,
+ * 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(void)
+{
+ int rv = 0;
+ int n;
+
+ if (new_style_driver) {
+ while ((n = read_packet(inpacket_buf)) > 0)
+ if (loop_frame(inpacket_buf, n))
+ rv = 1;
+ return rv;
+ }
+
+ while ((n = read(master_fd, inbuf, sizeof(inbuf))) > 0)
+ if (loop_chars(inbuf, n))
+ rv = 1;
+
+ if (n == 0)
+ fatal("eof on loopback");
+
+ if (errno != EWOULDBLOCK)
+ fatal("read from loopback: %m(%d)", errno);
+
+ return rv;
+}
+
+/********************************************************************
+ *
* ppp_send_config - configure the transmit characteristics of
* the ppp interface.
*/
+
void ppp_send_config (int unit,int mtu,u_int32_t asyncmap,int pcomp,int accomp)
{
u_int x;
struct ifreq ifr;
- MAINDEBUG ((LOG_DEBUG, "send_config: mtu = %d\n", mtu));
- strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
- ifr.ifr_mtu = mtu;
- if (ioctl(s, SIOCSIFMTU, (caddr_t) &ifr) < 0) {
- syslog(LOG_ERR, "ioctl(SIOCSIFMTU): %m");
- quit();
- }
-
- MAINDEBUG ((LOG_DEBUG, "send_config: asyncmap = %lx\n", asyncmap));
- if (ioctl(fd, PPPIOCSASYNCMAP, (caddr_t) &asyncmap) < 0) {
- syslog(LOG_ERR, "ioctl(PPPIOCSASYNCMAP): %m");
- quit();
+ SYSDEBUG ((LOG_DEBUG, "send_config: mtu = %d\n", mtu));
+/*
+ * Ensure that the link is still up.
+ */
+ if (!still_ppp())
+ return;
+/*
+ * Set the MTU and other parameters for the ppp device
+ */
+ memset (&ifr, '\0', sizeof (ifr));
+ strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
+ ifr.ifr_mtu = mtu;
+
+ if (ioctl(sock_fd, SIOCSIFMTU, (caddr_t) &ifr) < 0)
+ fatal("ioctl(SIOCSIFMTU): %m(%d)", errno);
+
+ SYSDEBUG ((LOG_DEBUG, "send_config: asyncmap = %lx\n", asyncmap));
+ if (ioctl(ppp_fd, PPPIOCSASYNCMAP, (caddr_t) &asyncmap) < 0) {
+ if (!ok_error(errno))
+ fatal("ioctl(PPPIOCSASYNCMAP): %m(%d)", errno);
+ return;
}
- if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
- syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m");
- quit();
- }
-
+ x = get_flags(ppp_fd);
x = pcomp ? x | SC_COMP_PROT : x & ~SC_COMP_PROT;
x = accomp ? x | SC_COMP_AC : x & ~SC_COMP_AC;
-
- MAINDEBUG ((LOG_DEBUG, "send_config: flags = %x\n", x));
- if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
- syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
- quit();
- }
+ x = sync_serial ? x | SC_SYNC : x & ~SC_SYNC;
+ set_flags(ppp_fd, x);
}
-/*
+/********************************************************************
+ *
* ppp_set_xaccm - set the extended transmit ACCM for the interface.
*/
-void
-ppp_set_xaccm(unit, accm)
- int unit;
- ext_accm accm;
+
+void ppp_set_xaccm (int unit, ext_accm accm)
{
- MAINDEBUG ((LOG_DEBUG, "set_xaccm: %08lx %08lx %08lx %08lx\n",
+ SYSDEBUG ((LOG_DEBUG, "set_xaccm: %08lx %08lx %08lx %08lx\n",
accm[0], accm[1], accm[2], accm[3]));
- if (ioctl(fd, PPPIOCSXASYNCMAP, accm) < 0 && errno != ENOTTY)
- syslog(LOG_WARNING, "ioctl(set extended ACCM): %m");
+
+ if (ioctl(ppp_fd, PPPIOCSXASYNCMAP, accm) < 0 && errno != ENOTTY) {
+ if ( ! ok_error (errno))
+ warn("ioctl(set extended ACCM): %m(%d)", errno);
+ }
}
-/*
+/********************************************************************
+ *
* ppp_recv_config - configure the receive-side characteristics of
* the ppp interface.
*/
+
void ppp_recv_config (int unit,int mru,u_int32_t asyncmap,int pcomp,int accomp)
{
- u_int x;
-
- MAINDEBUG ((LOG_DEBUG, "recv_config: mru = %d\n", mru));
- if (ioctl(fd, PPPIOCSMRU, (caddr_t) &mru) < 0)
- syslog(LOG_ERR, "ioctl(PPPIOCSMRU): %m");
-
- MAINDEBUG ((LOG_DEBUG, "recv_config: asyncmap = %lx\n", asyncmap));
- if (ioctl(fd, PPPIOCRASYNCMAP, (caddr_t) &asyncmap) < 0) {
- syslog(LOG_ERR, "ioctl(PPPIOCRASYNCMAP): %m");
- quit();
- }
-
- if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
- syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m");
- quit();
+ SYSDEBUG ((LOG_DEBUG, "recv_config: mru = %d\n", mru));
+/*
+ * If we were called because the link has gone down then there is nothing
+ * which may be done. Just return without incident.
+ */
+ if (!still_ppp())
+ return;
+/*
+ * Set the receiver parameters
+ */
+ if (ioctl(ppp_fd, PPPIOCSMRU, (caddr_t) &mru) < 0) {
+ if ( ! ok_error (errno))
+ error("ioctl(PPPIOCSMRU): %m(%d)", errno);
}
+ if (new_style_driver && ioctl(ppp_dev_fd, PPPIOCSMRU, (caddr_t) &mru) < 0)
+ error("Couldn't set MRU in generic PPP layer: %m");
- x = !accomp? x | SC_REJ_COMP_AC: x &~ SC_REJ_COMP_AC;
- MAINDEBUG ((LOG_DEBUG, "recv_config: flags = %x\n", x));
- if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
- syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
- quit();
+ SYSDEBUG ((LOG_DEBUG, "recv_config: asyncmap = %lx\n", asyncmap));
+ if (ioctl(ppp_fd, PPPIOCSRASYNCMAP, (caddr_t) &asyncmap) < 0) {
+ if (!ok_error(errno))
+ error("ioctl(PPPIOCSRASYNCMAP): %m(%d)", errno);
}
}
-/*
+/********************************************************************
+ *
* 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;
+
+int ccp_test (int unit, u_char *opt_ptr, int opt_len, int for_transmit)
{
- struct ppp_comp_data data;
+ struct ppp_option_data data;
- data.ptr = opt_ptr;
- data.length = opt_len;
+ memset (&data, '\0', sizeof (data));
+ data.ptr = opt_ptr;
+ data.length = opt_len;
data.transmit = for_transmit;
- return ioctl(fd, PPPIOCSCOMPRESS, (caddr_t) &data) >= 0;
-}
-/*
- * ccp_flags_set - inform kernel about the current state of CCP.
- */
-void
-ccp_flags_set(unit, isopen, isup)
- int unit, isopen, isup;
-{
- int x;
+ if (ioctl(ppp_dev_fd, PPPIOCSCOMPRESS, (caddr_t) &data) >= 0)
+ return 1;
- if (ioctl(fd, 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)
- syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
+ return (errno == ENOBUFS)? 0: -1;
}
-/*
- * sifvjcomp - config tcp header compression
+/********************************************************************
+ *
+ * ccp_flags_set - inform kernel about the current state of CCP.
*/
-int sifvjcomp (int u, int vjcomp, int cidcomp, int maxcid)
+void ccp_flags_set (int unit, int isopen, int isup)
{
- u_int x;
-
- if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
- syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %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) {
- syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
- return 0;
- }
-
- if (vjcomp) {
- if (ioctl (fd, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0) {
- syslog (LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
- return 0;
- }
+ if (still_ppp()) {
+ int x = get_flags(ppp_dev_fd);
+ x = isopen? x | SC_CCP_OPEN : x &~ SC_CCP_OPEN;
+ x = isup? x | SC_CCP_UP : x &~ SC_CCP_UP;
+ set_flags (ppp_dev_fd, x);
}
-
- return 1;
}
-/*
- * sifup - Config the interface up and enable IP packets to pass.
+/********************************************************************
+ *
+ * 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(ppp_dev_fd, PPPIOCGIDLE, ip) >= 0;
+}
-int sifup (int u)
+/********************************************************************
+ *
+ * get_ppp_stats - return statistics for the link.
+ */
+int
+get_ppp_stats(u, stats)
+ int u;
+ struct pppd_stats *stats;
{
- struct ifreq ifr;
+ struct ifpppstatsreq req;
- strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
- if (ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
- syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m");
- return 0;
- }
+ memset (&req, 0, sizeof (req));
- ifr.ifr_flags |= (IFF_UP | IFF_POINTOPOINT);
- if (ioctl(s, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
- syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
+ req.stats_ptr = (caddr_t) &req.stats;
+ strlcpy(req.ifr__name, ifname, sizeof(req.ifr__name));
+ if (ioctl(sock_fd, SIOCGPPPSTATS, &req) < 0) {
+ error("Couldn't get PPP statistics: %m");
return 0;
}
+ stats->bytes_in = req.stats.p.ppp_ibytes;
+ stats->bytes_out = req.stats.p.ppp_obytes;
return 1;
}
-/*
- * sifdown - Config the interface down and disable IP.
+/********************************************************************
+ *
+ * ccp_fatal_error - returns 1 if decompression was disabled as a
+ * result of an error detected after decompression of a packet,
+ * 0 otherwise. This is necessary because of patent nonsense.
*/
-int sifdown (int u)
+int ccp_fatal_error (int unit)
{
- struct ifreq ifr;
+ int x = get_flags(ppp_dev_fd);
- strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
- if (ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
- syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m");
- return 0;
- }
-
- ifr.ifr_flags &= ~IFF_UP;
- ifr.ifr_flags |= IFF_POINTOPOINT;
- if (ioctl(s, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
- syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
- return 0;
- }
- return 1;
+ return x & SC_DC_FERROR;
}
/*
- * sifaddr - Config the interface IP addresses and netmask.
+ * path_to_route - determine the path to the proc file system data
*/
+#define ROUTE_MAX_COLS 12
+FILE *route_fd = (FILE *) 0;
+static char route_buffer [512];
+static int route_dev_col, route_dest_col, route_gw_col;
+static int route_flags_col, route_mask_col;
+static int route_num_cols;
-int sifaddr (int unit, int our_adr, int his_adr, int net_mask)
-{
- struct ifreq ifr;
- struct rtentry rt;
-
- SET_SA_FAMILY (ifr.ifr_addr, AF_INET);
- SET_SA_FAMILY (ifr.ifr_dstaddr, AF_INET);
- SET_SA_FAMILY (ifr.ifr_netmask, AF_INET);
+static char *path_to_route (void);
+static int open_route_table (void);
+static void close_route_table (void);
+static int read_route_table (struct rtentry *rt);
- strncpy (ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
-/*
- * Set our IP address
- */
- ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = our_adr;
- if (ioctl(s, SIOCSIFADDR, (caddr_t) &ifr) < 0) {
- if (errno != EEXIST)
- syslog (LOG_ERR, "ioctl(SIOCAIFADDR): %m");
- else
- syslog (LOG_WARNING, "ioctl(SIOCAIFADDR): Address already exists");
- return (0);
- }
-/*
- * Set the gateway address
- */
- ((struct sockaddr_in *) &ifr.ifr_dstaddr)->sin_addr.s_addr = his_adr;
- if (ioctl(s, SIOCSIFDSTADDR, (caddr_t) &ifr) < 0) {
- syslog (LOG_ERR, "ioctl(SIOCSIFDSTADDR): %m");
- return (0);
- }
-/*
- * Set the netmask
- */
- if (net_mask != 0) {
- ((struct sockaddr_in *) &ifr.ifr_netmask)->sin_addr.s_addr = net_mask;
- if (ioctl(s, SIOCSIFNETMASK, (caddr_t) &ifr) < 0) {
- syslog (LOG_ERR, "ioctl(SIOCSIFNETMASK): %m");
- return (0);
- }
- }
-/*
- * Add the device route
+/********************************************************************
+ *
+ * path_to_procfs - find the path to the proc file system mount point
*/
- memset (&rt, '\0', sizeof (rt));
- SET_SA_FAMILY (rt.rt_dst, AF_INET);
- SET_SA_FAMILY (rt.rt_gateway, AF_INET);
- rt.rt_dev = ifname; /* MJC */
+static int path_to_procfs (const char *tail)
+{
+ struct mntent *mntent;
+ FILE *fp;
- ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = 0;
- ((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr = his_adr;
- rt.rt_flags = RTF_UP | RTF_HOST;
+ fp = fopen(MOUNTED, "r");
+ if (fp == NULL) {
+ /* Default the mount location of /proc */
+ strlcpy (route_buffer, "/proc", sizeof (route_buffer));
+ strlcat (route_buffer, tail, sizeof(route_buffer));
+ return 1;
+ }
- if (ioctl(s, SIOCADDRT, &rt) < 0) {
- syslog (LOG_ERR, "ioctl(SIOCADDRT) device route: %m");
- return (0);
+ while ((mntent = getmntent(fp)) != NULL) {
+ if (strcmp(mntent->mnt_type, MNTTYPE_IGNORE) == 0)
+ continue;
+ if (strcmp(mntent->mnt_type, "proc") == 0)
+ break;
}
+ fclose (fp);
+ if (mntent == 0)
+ return 0;
+
+ strlcpy(route_buffer, mntent->mnt_dir, sizeof (route_buffer));
+ strlcat (route_buffer, tail, sizeof(route_buffer));
return 1;
}
-/*
- * cifaddr - Clear the interface IP addresses, and delete routes
- * through the interface if possible.
+/********************************************************************
+ *
+ * path_to_route - find the path to the route tables in the proc file system
*/
-int cifaddr (int unit, int our_adr, int his_adr)
+static char *path_to_route (void)
{
- struct rtentry rt;
-/*
- * Delete the route through the device
- */
- memset (&rt, '\0', sizeof (rt));
-
- SET_SA_FAMILY (rt.rt_dst, AF_INET);
- SET_SA_FAMILY (rt.rt_gateway, AF_INET);
- rt.rt_dev = ifname; /* MJC */
-
- ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = 0;
- ((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr = his_adr;
- rt.rt_flags = RTF_UP | RTF_HOST;
-
- if (ioctl(s, SIOCDELRT, &rt) < 0) {
- syslog (LOG_ERR, "ioctl(SIOCDELRT) device route: %m");
- return (0);
+ if (!path_to_procfs("/net/route")) {
+ error("proc file system not mounted");
+ return 0;
}
- return 1;
+ return (route_buffer);
}
-/*
- * path_to_route - determine the path to the proc file system data
- */
-
-FILE *route_fd = (FILE *) 0;
-static char route_buffer [100];
-
-static char *path_to_route (void);
-static int open_route_table (void);
-static void close_route_table (void);
-static int read_route_table (struct rtentry *rt);
-static int defaultroute_exists (void);
-
-/*
- * path_to_route - find the path to the route tables in the proc file system
+/********************************************************************
+ *
+ * close_route_table - close the interface to the route table
*/
-static char *path_to_route (void)
+static void close_route_table (void)
{
- struct mntent *mntent;
- FILE *fp;
-
- fp = fopen (MOUNTED, "r");
- if (fp != 0) {
- while ((mntent = getmntent (fp)) != 0) {
- if (strcmp (mntent->mnt_type, MNTTYPE_IGNORE) == 0)
- continue;
-
- if (strcmp (mntent->mnt_type, "proc") == 0) {
- strncpy (route_buffer, mntent->mnt_dir,
- sizeof (route_buffer)-10);
- route_buffer [sizeof (route_buffer)-10] = '\0';
- strcat (route_buffer, "/net/route");
-
- fclose (fp);
- return (route_buffer);
- }
- }
- fclose (fp);
+ if (route_fd != (FILE *) 0) {
+ fclose (route_fd);
+ route_fd = (FILE *) 0;
}
- syslog (LOG_ERR, "proc file system not mounted");
- return 0;
}
-/*
+/********************************************************************
+ *
* open_route_table - open the interface to the route table
*/
+static char route_delims[] = " \t\n";
static int open_route_table (void)
{
char *path;
- if (route_fd != (FILE *) 0)
- close_route_table();
+ close_route_table();
path = path_to_route();
if (path == NULL)
return 0;
route_fd = fopen (path, "r");
- if (route_fd == (FILE *) 0) {
- syslog (LOG_ERR, "can not open %s: %m", path);
+ if (route_fd == NULL) {
+ error("can't open %s: %m (%d)", path, errno);
return 0;
}
- /* read and discard the header line. */
- if (fgets (route_buffer, sizeof (route_buffer), route_fd) == (char *) 0) {
- close_route_table();
- return 0;
+ route_dev_col = 0; /* default to usual columns */
+ route_dest_col = 1;
+ route_gw_col = 2;
+ route_flags_col = 3;
+ route_mask_col = 7;
+ route_num_cols = 8;
+
+ /* parse header line */
+ if (fgets(route_buffer, sizeof(route_buffer), route_fd) != 0) {
+ char *p = route_buffer, *q;
+ int col;
+ for (col = 0; col < ROUTE_MAX_COLS; ++col) {
+ int used = 1;
+ if ((q = strtok(p, route_delims)) == 0)
+ break;
+ if (strcasecmp(q, "iface") == 0)
+ route_dev_col = col;
+ else if (strcasecmp(q, "destination") == 0)
+ route_dest_col = col;
+ else if (strcasecmp(q, "gateway") == 0)
+ route_gw_col = col;
+ else if (strcasecmp(q, "flags") == 0)
+ route_flags_col = col;
+ else if (strcasecmp(q, "mask") == 0)
+ route_mask_col = col;
+ else
+ used = 0;
+ if (used && col >= route_num_cols)
+ route_num_cols = col + 1;
+ p = NULL;
+ }
}
- return 1;
-}
-
-/*
- * close_route_table - close the interface to the route table
- */
-static void close_route_table (void)
-{
- if (route_fd != (FILE *) 0) {
- fclose (route_fd);
- route_fd = (FILE *) 0;
- }
+ return 1;
}
-/*
+/********************************************************************
+ *
* read_route_table - read the next entry from the route table
*/
-static int read_route_table (struct rtentry *rt)
+static int read_route_table(struct rtentry *rt)
{
- static char delims[] = " \t\n";
- char *dev_ptr, *ptr, *dst_ptr, *gw_ptr, *flag_ptr;
+ char *cols[ROUTE_MAX_COLS], *p;
+ int col;
+
+ memset (rt, '\0', sizeof (struct rtentry));
if (fgets (route_buffer, sizeof (route_buffer), route_fd) == (char *) 0)
- return 0;
-
- memset (rt, '\0', sizeof (struct rtentry));
+ return 0;
- dev_ptr = strtok (route_buffer, delims); /* interface name */
- dst_ptr = strtok (NULL, delims); /* destination address */
- gw_ptr = strtok (NULL, delims); /* gateway */
- flag_ptr = strtok (NULL, delims); /* flags */
-#if 0
- ptr = strtok (NULL, delims); /* reference count */
- ptr = strtok (NULL, delims); /* useage count */
- ptr = strtok (NULL, delims); /* metric */
- ptr = strtok (NULL, delims); /* mask */
-#endif
+ p = route_buffer;
+ for (col = 0; col < route_num_cols; ++col) {
+ cols[col] = strtok(p, route_delims);
+ if (cols[col] == NULL)
+ return 0; /* didn't get enough columns */
+ p = NULL;
+ }
((struct sockaddr_in *) &rt->rt_dst)->sin_addr.s_addr =
- strtoul (dst_ptr, NULL, 16);
+ strtoul(cols[route_dest_col], NULL, 16);
((struct sockaddr_in *) &rt->rt_gateway)->sin_addr.s_addr =
- strtoul (gw_ptr, NULL, 16);
+ strtoul(cols[route_gw_col], NULL, 16);
- rt->rt_flags = (short) strtoul (flag_ptr, NULL, 16);
- rt->rt_dev = dev_ptr;
+ ((struct sockaddr_in *) &rt->rt_genmask)->sin_addr.s_addr =
+ strtoul(cols[route_mask_col], NULL, 16);
+
+ rt->rt_flags = (short) strtoul(cols[route_flags_col], NULL, 16);
+ rt->rt_dev = cols[route_dev_col];
return 1;
}
-/*
+/********************************************************************
+ *
* defaultroute_exists - determine if there is a default route
*/
-static int defaultroute_exists (void)
+static int defaultroute_exists (struct rtentry *rt)
{
- struct rtentry rt;
- int result = 0;
+ int result = 0;
if (!open_route_table())
return 0;
- while (read_route_table(&rt) != 0) {
- if (rt.rt_flags & RTF_UP == 0)
+ while (read_route_table(rt) != 0) {
+ if ((rt->rt_flags & RTF_UP) == 0)
continue;
- if (((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr == 0L) {
- syslog (LOG_ERR,
- "ppp not replacing existing default route to %s[%s]",
- rt.rt_dev,
- inet_ntoa (((struct sockaddr_in *) &rt.rt_gateway)->
- sin_addr.s_addr));
+ if (((struct sockaddr_in *) (&rt->rt_dst))->sin_addr.s_addr == 0L) {
result = 1;
break;
}
}
+
close_route_table();
return result;
}
/*
+ * have_route_to - determine if the system has any route to
+ * a given IP address. `addr' is in network byte order.
+ * Return value is 1 if yes, 0 if no, -1 if don't know.
+ * For demand mode to work properly, we have to ignore routes
+ * through our own interface.
+ */
+int have_route_to(u_int32_t addr)
+{
+ struct rtentry rt;
+ int result = 0;
+
+ if (!open_route_table())
+ return -1; /* don't know */
+
+ while (read_route_table(&rt)) {
+ if ((rt.rt_flags & RTF_UP) == 0 || strcmp(rt.rt_dev, ifname) == 0)
+ continue;
+ if ((addr & ((struct sockaddr_in *)&rt.rt_genmask)->sin_addr.s_addr)
+ == ((struct sockaddr_in *)&rt.rt_dst)->sin_addr.s_addr) {
+ result = 1;
+ break;
+ }
+ }
+
+ close_route_table();
+ return result;
+}
+
+/********************************************************************
+ *
* sifdefaultroute - assign a default route through the address given.
*/
-int sifdefaultroute (int unit, int gateway)
+int sifdefaultroute (int unit, u_int32_t ouraddr, u_int32_t gateway)
{
struct rtentry rt;
- if (defaultroute_exists())
- return 0;
+ if (defaultroute_exists(&rt) && strcmp(rt.rt_dev, ifname) != 0) {
+ struct in_addr old_gateway =
+ ((struct sockaddr_in *) (&rt.rt_gateway))-> sin_addr;
+
+ if (old_gateway.s_addr != gateway)
+ error("not replacing existing default route to %s [%I]",
+ rt.rt_dev, old_gateway);
+ return 0;
+ }
memset (&rt, '\0', sizeof (rt));
SET_SA_FAMILY (rt.rt_dst, AF_INET);
SET_SA_FAMILY (rt.rt_gateway, AF_INET);
+
+ if (kernel_version > KVERSION(2,1,0)) {
+ SET_SA_FAMILY (rt.rt_genmask, AF_INET);
+ ((struct sockaddr_in *) &rt.rt_genmask)->sin_addr.s_addr = 0L;
+ }
+
((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = gateway;
- rt.rt_flags = RTF_UP | RTF_GATEWAY;
- if (ioctl(s, SIOCADDRT, &rt) < 0) {
- syslog (LOG_ERR, "default route ioctl(SIOCADDRT): %m");
+ rt.rt_flags = RTF_UP | RTF_GATEWAY | RTF_DEFAULT;
+ if (ioctl(sock_fd, SIOCADDRT, &rt) < 0) {
+ if ( ! ok_error ( errno ))
+ error("default route ioctl(SIOCADDRT): %m(%d)", errno);
return 0;
}
+
+ default_route_gateway = gateway;
return 1;
}
-/*
+/********************************************************************
+ *
* cifdefaultroute - delete a default route through the address given.
*/
-int cifdefaultroute (int unit, int gateway)
+int cifdefaultroute (int unit, u_int32_t ouraddr, u_int32_t gateway)
{
struct rtentry rt;
-
+
+ default_route_gateway = 0;
+
+ memset (&rt, '\0', sizeof (rt));
SET_SA_FAMILY (rt.rt_dst, AF_INET);
SET_SA_FAMILY (rt.rt_gateway, AF_INET);
+
+ if (kernel_version > KVERSION(2,1,0)) {
+ SET_SA_FAMILY (rt.rt_genmask, AF_INET);
+ ((struct sockaddr_in *) &rt.rt_genmask)->sin_addr.s_addr = 0L;
+ }
+
((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = gateway;
- rt.rt_flags = RTF_UP | RTF_GATEWAY;
- if (ioctl(s, SIOCDELRT, &rt) < 0) {
- syslog (LOG_ERR, "default route ioctl(SIOCDELRT): %m");
- return 0;
+ rt.rt_flags = RTF_UP | RTF_GATEWAY | RTF_DEFAULT;
+ if (ioctl(sock_fd, SIOCDELRT, &rt) < 0 && errno != ESRCH) {
+ if (still_ppp()) {
+ if ( ! ok_error ( errno ))
+ error("default route ioctl(SIOCDELRT): %m (%d)", errno);
+ return 0;
+ }
}
+
return 1;
}
-/*
+/********************************************************************
+ *
* sifproxyarp - Make a proxy ARP entry for the peer.
*/
{
struct arpreq arpreq;
- memset (&arpreq, '\0', sizeof(arpreq));
+ if (has_proxy_arp == 0) {
+ memset (&arpreq, '\0', sizeof(arpreq));
+
+ SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
+ ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = his_adr;
+ arpreq.arp_flags = ATF_PERM | ATF_PUBL;
/*
* Get the hardware address of an interface on the same subnet
* as our local address.
*/
- if (!get_ether_addr(his_adr, &arpreq.arp_ha)) {
- syslog(LOG_ERR, "Cannot determine ethernet address for proxy ARP");
- return 0;
- }
-
- SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
- ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = his_adr;
- arpreq.arp_flags = ATF_PERM | ATF_PUBL;
-
- if (ioctl(s, SIOCSARP, (caddr_t)&arpreq) < 0) {
- syslog(LOG_ERR, "ioctl(SIOCSARP): %m");
- return 0;
+ if (!get_ether_addr(his_adr, &arpreq.arp_ha, proxy_arp_dev,
+ sizeof(proxy_arp_dev))) {
+ error("Cannot determine ethernet address for proxy ARP");
+ return 0;
+ }
+ strlcpy(arpreq.arp_dev, proxy_arp_dev, sizeof(arpreq.arp_dev));
+
+ if (ioctl(sock_fd, SIOCSARP, (caddr_t)&arpreq) < 0) {
+ if ( ! ok_error ( errno ))
+ error("ioctl(SIOCSARP): %m(%d)", errno);
+ return 0;
+ }
+ proxy_arp_addr = his_adr;
+ has_proxy_arp = 1;
}
+
return 1;
}
-/*
+/********************************************************************
+ *
* cifproxyarp - Delete the proxy ARP entry for the peer.
*/
int cifproxyarp (int unit, u_int32_t his_adr)
{
struct arpreq arpreq;
-
- memset (&arpreq, '\0', sizeof(arpreq));
- SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
-
- ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = his_adr;
- if (ioctl(s, SIOCDARP, (caddr_t)&arpreq) < 0) {
- syslog(LOG_WARNING, "ioctl(SIOCDARP): %m");
- return 0;
+
+ if (has_proxy_arp) {
+ has_proxy_arp = 0;
+ memset (&arpreq, '\0', sizeof(arpreq));
+ SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
+ ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = his_adr;
+ arpreq.arp_flags = ATF_PERM | ATF_PUBL;
+ strlcpy(arpreq.arp_dev, proxy_arp_dev, sizeof(arpreq.arp_dev));
+
+ if (ioctl(sock_fd, SIOCDARP, (caddr_t)&arpreq) < 0) {
+ if ( ! ok_error ( errno ))
+ warn("ioctl(SIOCDARP): %m(%d)", errno);
+ return 0;
+ }
}
return 1;
}
-/*
+/********************************************************************
+ *
* get_ether_addr - get the hardware address of an interface on the
* the same subnet as ipaddr.
*/
-int get_ether_addr (u_int32_t ipaddr, struct sockaddr *hwaddr)
+static int get_ether_addr (u_int32_t ipaddr,
+ struct sockaddr *hwaddr,
+ char *name, int namelen)
{
- struct ifreq *ifr, *ifend, *ifp;
- int i;
+ struct ifreq *ifr, *ifend;
u_int32_t ina, mask;
- struct sockaddr_dl *dla;
struct ifreq ifreq;
struct ifconf ifc;
struct ifreq ifs[MAX_IFS];
ifc.ifc_len = sizeof(ifs);
ifc.ifc_req = ifs;
- if (ioctl(s, SIOCGIFCONF, &ifc) < 0) {
- syslog(LOG_ERR, "ioctl(SIOCGIFCONF): %m");
+ if (ioctl(sock_fd, SIOCGIFCONF, &ifc) < 0) {
+ if ( ! ok_error ( errno ))
+ error("ioctl(SIOCGIFCONF): %m(%d)", errno);
return 0;
}
- MAINDEBUG ((LOG_DEBUG, "proxy arp: scanning %d interfaces for IP %s",
+
+ SYSDEBUG ((LOG_DEBUG, "proxy arp: scanning %d interfaces for IP %s",
ifc.ifc_len / sizeof(struct ifreq), ip_ntoa(ipaddr)));
/*
* Scan through looking for an interface with an Internet
for (ifr = ifc.ifc_req; ifr < ifend; ifr++) {
if (ifr->ifr_addr.sa_family == AF_INET) {
ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
- strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
- MAINDEBUG ((LOG_DEBUG, "proxy arp: examining interface %s",
+ strlcpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
+ SYSDEBUG ((LOG_DEBUG, "proxy arp: examining interface %s",
ifreq.ifr_name));
/*
* Check that the interface is up, and not point-to-point
- * or loopback.
+ * nor loopback.
*/
- if (ioctl(s, SIOCGIFFLAGS, &ifreq) < 0)
+ if (ioctl(sock_fd, SIOCGIFFLAGS, &ifreq) < 0)
continue;
- if ((ifreq.ifr_flags &
- (IFF_UP|IFF_BROADCAST|IFF_POINTOPOINT|IFF_LOOPBACK|IFF_NOARP))
- != (IFF_UP|IFF_BROADCAST))
+
+ if (((ifreq.ifr_flags ^ FLAGS_GOOD) & FLAGS_MASK) != 0)
continue;
/*
* Get its netmask and check that it's on the right subnet.
*/
- if (ioctl(s, SIOCGIFNETMASK, &ifreq) < 0)
+ if (ioctl(sock_fd, SIOCGIFNETMASK, &ifreq) < 0)
continue;
+
mask = ((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr.s_addr;
- MAINDEBUG ((LOG_DEBUG, "proxy arp: interface addr %s mask %lx",
+ SYSDEBUG ((LOG_DEBUG, "proxy arp: interface addr %s mask %lx",
ip_ntoa(ina), ntohl(mask)));
+
if (((ipaddr ^ ina) & mask) != 0)
continue;
break;
if (ifr >= ifend)
return 0;
- syslog(LOG_INFO, "found interface %s for proxy arp", ifreq.ifr_name);
+ strlcpy(name, ifreq.ifr_name, namelen);
+ info("found interface %s for proxy arp", name);
/*
* Now get the hardware address.
*/
- if (ioctl (s, SIOCGIFHWADDR, &ifreq) < 0) {
- syslog(LOG_ERR, "SIOCGIFHWADDR(%s): %m", ifreq.ifr_name);
+ memset (&ifreq.ifr_hwaddr, 0, sizeof (struct sockaddr));
+ if (ioctl (sock_fd, SIOCGIFHWADDR, &ifreq) < 0) {
+ error("SIOCGIFHWADDR(%s): %m(%d)", ifreq.ifr_name, errno);
return 0;
}
- hwaddr->sa_family = ARPHRD_ETHER;
-#ifndef old_ifr_hwaddr
- memcpy (&hwaddr->sa_data, &ifreq.ifr_hwaddr, ETH_ALEN);
-#else
- memcpy (&hwaddr->sa_data, &ifreq.ifr_hwaddr.sa_data, ETH_ALEN);
-#endif
+ memcpy (hwaddr,
+ &ifreq.ifr_hwaddr,
+ sizeof (struct sockaddr));
- MAINDEBUG ((LOG_DEBUG,
- "proxy arp: found hwaddr %02x:%02x:%02x:%02x:%02x:%02x",
+ SYSDEBUG ((LOG_DEBUG,
+ "proxy arp: found hwaddr %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x",
(int) ((unsigned char *) &hwaddr->sa_data)[0],
(int) ((unsigned char *) &hwaddr->sa_data)[1],
(int) ((unsigned char *) &hwaddr->sa_data)[2],
(int) ((unsigned char *) &hwaddr->sa_data)[3],
(int) ((unsigned char *) &hwaddr->sa_data)[4],
- (int) ((unsigned char *) &hwaddr->sa_data)[5]));
+ (int) ((unsigned char *) &hwaddr->sa_data)[5],
+ (int) ((unsigned char *) &hwaddr->sa_data)[6],
+ (int) ((unsigned char *) &hwaddr->sa_data)[7]));
return 1;
}
+/********************************************************************
+ *
+ * Return user specified netmask, modified by any mask we might determine
+ * for address `addr' (in network byte order).
+ * Here we scan through the system's list of interfaces, looking for
+ * any non-point-to-point interfaces which might appear to be on the same
+ * network as `addr'. If we find any, we OR in their netmask to the
+ * user-specified netmask.
+ */
+
+u_int32_t GetMask (u_int32_t addr)
+{
+ u_int32_t mask, nmask, ina;
+ struct ifreq *ifr, *ifend, ifreq;
+ struct ifconf ifc;
+ struct ifreq ifs[MAX_IFS];
+
+ addr = ntohl(addr);
+
+ if (IN_CLASSA(addr)) /* determine network mask for address class */
+ nmask = IN_CLASSA_NET;
+ else if (IN_CLASSB(addr))
+ nmask = IN_CLASSB_NET;
+ else
+ nmask = IN_CLASSC_NET;
+
+ /* class D nets are disallowed by bad_ip_adrs */
+ mask = netmask | htonl(nmask);
+/*
+ * Scan through the system's network interfaces.
+ */
+ ifc.ifc_len = sizeof(ifs);
+ ifc.ifc_req = ifs;
+ if (ioctl(sock_fd, SIOCGIFCONF, &ifc) < 0) {
+ if ( ! ok_error ( errno ))
+ warn("ioctl(SIOCGIFCONF): %m(%d)", errno);
+ return mask;
+ }
+
+ ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
+ for (ifr = ifc.ifc_req; ifr < ifend; ifr++) {
+/*
+ * Check the interface's internet address.
+ */
+ if (ifr->ifr_addr.sa_family != AF_INET)
+ continue;
+ ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
+ if (((ntohl(ina) ^ addr) & nmask) != 0)
+ continue;
+/*
+ * Check that the interface is up, and not point-to-point nor loopback.
+ */
+ strlcpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
+ if (ioctl(sock_fd, SIOCGIFFLAGS, &ifreq) < 0)
+ continue;
+
+ if (((ifreq.ifr_flags ^ FLAGS_GOOD) & FLAGS_MASK) != 0)
+ continue;
/*
+ * Get its netmask and OR it into our mask.
+ */
+ if (ioctl(sock_fd, SIOCGIFNETMASK, &ifreq) < 0)
+ continue;
+ mask |= ((struct sockaddr_in *)&ifreq.ifr_addr)->sin_addr.s_addr;
+ break;
+ }
+ return mask;
+}
+
+/********************************************************************
+ *
* Internal routine to decode the version.modification.patch level
*/
static void decode_version (char *buf, int *version,
int *modification, int *patch)
{
+ *version = (int) strtoul (buf, &buf, 10);
+ *modification = 0;
+ *patch = 0;
+
+ if (*buf == '.') {
+ ++buf;
+ *modification = (int) strtoul (buf, &buf, 10);
+ if (*buf == '.') {
+ ++buf;
+ *patch = (int) strtoul (buf, &buf, 10);
+ }
+ }
+
+ if (*buf != '\0') {
+ *version =
+ *modification =
+ *patch = 0;
+ }
+}
- *version = (int) strtoul (buf, &buf, 10);
- *modification = 0;
- *patch = 0;
-
- if (*buf == '.') {
- ++buf;
- *modification = (int) strtoul (buf, &buf, 10);
- if (*buf == '.') {
- ++buf;
- *patch = (int) strtoul (buf, &buf, 10);
- }
- }
-
- if (*buf != '\0') {
- *version =
- *modification =
- *patch = 0;
- }
+/********************************************************************
+ *
+ * Procedure to determine if the PPP line discipline is registered.
+ */
+
+static int
+ppp_registered(void)
+{
+ int local_fd;
+ int mfd = -1;
+ int ret = 0;
+ char slave[16];
+
+ /*
+ * We used to open the serial device and set it to the ppp line
+ * discipline here, in order to create a ppp unit. But that is
+ * not a good idea - the user might have specified a device that
+ * they can't open (permission, or maybe it doesn't really exist).
+ * So we grab a pty master/slave pair and use that.
+ */
+ if (!get_pty(&mfd, &local_fd, slave, 0)) {
+ no_ppp_msg = "Couldn't determine if PPP is supported (no free ptys)";
+ return 0;
+ }
+
+ /*
+ * Try to put the device into the PPP discipline.
+ */
+ if (ioctl(local_fd, TIOCSETD, &ppp_disc) < 0) {
+ error("ioctl(TIOCSETD(PPP)): %m(%d)", errno);
+ } else
+ ret = 1;
+
+ close(local_fd);
+ close(mfd);
+ return ret;
}
-/*
+/********************************************************************
+ *
* ppp_available - check whether the system has any ppp interfaces
* (in fact we check whether we can do an ioctl on ppp0).
*/
int ppp_available(void)
{
- int s, ok;
+ int s, ok, fd;
struct ifreq ifr;
- int my_version, my_modification, my_patch;
+ int size;
+ int my_version, my_modification, my_patch;
+
+ no_ppp_msg =
+ "This system lacks kernel support for PPP. This could be because\n"
+ "the PPP kernel module could not be loaded, or because PPP was not\n"
+ "included in the kernel configuration. If PPP was included as a\n"
+ "module, try `/sbin/modprobe -v ppp'. If that fails, check that\n"
+ "ppp.o exists in /lib/modules/`uname -r`/net.\n"
+ "See README.linux file in the ppp distribution for more details.\n";
+
+ fd = open("/dev/ppp", O_RDWR);
+ if (fd >= 0) {
+ new_style_driver = 1;
+
+ /* XXX should get from driver */
+ driver_version = 2;
+ driver_modification = 4;
+ driver_patch = 0;
+ close(fd);
+ return 1;
+ }
+
/*
* Open a socket for doing the ioctl operations.
*/
if (s < 0)
return 0;
- strncpy (ifr.ifr_name, "ppp0", sizeof (ifr.ifr_name));
+ strlcpy (ifr.ifr_name, "ppp0", sizeof (ifr.ifr_name));
ok = ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) >= 0;
+/*
+ * If the device did not exist then attempt to create one by putting the
+ * current tty into the PPP discipline. If this works then obtain the
+ * flags for the device again.
+ */
+ if (!ok) {
+ if (ppp_registered()) {
+ strlcpy (ifr.ifr_name, "ppp0", sizeof (ifr.ifr_name));
+ ok = ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) >= 0;
+ }
+ }
/*
* Ensure that the hardware address is for PPP and not something else
*/
- if (ok != 0)
+ if (ok)
ok = ioctl (s, SIOCGIFHWADDR, (caddr_t) &ifr) >= 0;
- if (ok != 0 && ifr.ifr_hwaddr.sa_family != ARPHRD_PPP)
+ if (ok && ((ifr.ifr_hwaddr.sa_family & ~0xFF) != ARPHRD_PPP))
ok = 0;
+
/*
* This is the PPP device. Validate the version of the driver at this
* point to ensure that this program will work with the driver.
*/
- if (ok != 0) {
- char abBuffer [1024];
- int size;
+ if (ok) {
+ char abBuffer [1024];
ifr.ifr_data = abBuffer;
- size = ioctl (s, SIOCDEVPRIVATE, (caddr_t) &ifr);
- ok = size >= 0;
-
- if (ok != 0) {
- decode_version (abBuffer,
- &driver_version,
- &driver_modification,
- &driver_patch);
+ size = ioctl (s, SIOCGPPPVER, (caddr_t) &ifr);
+ if (size < 0) {
+ error("Couldn't read driver version: %m");
+ ok = 0;
+ no_ppp_msg = "Sorry, couldn't verify kernel driver version\n";
+
+ } else {
+ decode_version(abBuffer,
+ &driver_version,
+ &driver_modification,
+ &driver_patch);
+/*
+ * Validate the version of the driver against the version that we used.
+ */
+ decode_version(VERSION,
+ &my_version,
+ &my_modification,
+ &my_patch);
+
+ /* The version numbers must match */
+ if (driver_version != my_version)
+ ok = 0;
+
+ /* The modification levels must be legal */
+ if (driver_modification < 3) {
+ if (driver_modification >= 2) {
+ /* we can cope with 2.2.0 and above */
+ driver_is_old = 1;
+ } else {
+ ok = 0;
+ }
+ }
+
+ close (s);
+ if (!ok) {
+ slprintf(route_buffer, sizeof(route_buffer),
+ "Sorry - PPP driver version %d.%d.%d is out of date\n",
+ driver_version, driver_modification, driver_patch);
+
+ no_ppp_msg = route_buffer;
+ }
+ }
+ }
+ return ok;
+}
+
+/********************************************************************
+ *
+ * Update the wtmp file with the appropriate user name and tty device.
+ */
+
+void logwtmp (const char *line, const char *name, const char *host)
+{
+ int wtmp;
+ struct utmp ut, *utp;
+ pid_t mypid = getpid();
+/*
+ * Update the signon database for users.
+ * Christoph Lameter: Copied from poeigl-1.36 Jan 3, 1996
+ */
+ utmpname(_PATH_UTMP);
+ setutent();
+ while ((utp = getutent()) && (utp->ut_pid != mypid))
+ /* nothing */;
+
+ /* Is this call really necessary? There is another one after the 'put' */
+ endutent();
+
+ if (utp)
+ memcpy(&ut, utp, sizeof(ut));
+ else
+ /* some gettys/telnetds don't initialize utmp... */
+ memset(&ut, 0, sizeof(ut));
+
+ if (ut.ut_id[0] == 0)
+ strncpy(ut.ut_id, line + 3, sizeof(ut.ut_id));
+
+ strncpy(ut.ut_user, name, sizeof(ut.ut_user));
+ strncpy(ut.ut_line, line, sizeof(ut.ut_line));
+
+ time(&ut.ut_time);
+
+ ut.ut_type = USER_PROCESS;
+ ut.ut_pid = mypid;
+
+ /* Insert the host name if one is supplied */
+ if (*host)
+ strncpy (ut.ut_host, host, sizeof(ut.ut_host));
+
+ /* Insert the IP address of the remote system if IP is enabled */
+ if (ipcp_protent.enabled_flag && ipcp_hisoptions[0].neg_addr)
+ memcpy(&ut.ut_addr, (char *) &ipcp_hisoptions[0].hisaddr,
+ sizeof(ut.ut_addr));
+
+ /* CL: Makes sure that the logout works */
+ if (*host == 0 && *name==0)
+ ut.ut_host[0]=0;
+
+ pututline(&ut);
+ endutent();
+/*
+ * Update the wtmp file.
+ */
+ wtmp = open(_PATH_WTMP, O_APPEND|O_WRONLY);
+ if (wtmp >= 0) {
+ flock(wtmp, LOCK_EX);
+
+ /* we really should check for error on the write for a full disk! */
+ write (wtmp, (char *)&ut, sizeof(ut));
+ close (wtmp);
+
+ flock(wtmp, LOCK_UN);
+ }
+}
+
+
+/********************************************************************
+ *
+ * sifvjcomp - config tcp header compression
+ */
+
+int sifvjcomp (int u, int vjcomp, int cidcomp, int maxcid)
+{
+ u_int x = get_flags(ppp_dev_fd);
+
+ if (vjcomp) {
+ if (ioctl (ppp_dev_fd, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0) {
+ if (! ok_error (errno))
+ error("ioctl(PPPIOCSMAXCID): %m(%d)", errno);
+ vjcomp = 0;
+ }
+ }
+
+ x = vjcomp ? x | SC_COMP_TCP : x &~ SC_COMP_TCP;
+ x = cidcomp ? x & ~SC_NO_TCP_CCID : x | SC_NO_TCP_CCID;
+ set_flags (ppp_dev_fd, x);
+
+ return 1;
+}
+
+/********************************************************************
+ *
+ * sifup - Config the interface up and enable IP packets to pass.
+ */
+
+int sifup (int u)
+{
+ struct ifreq ifr;
+
+ memset (&ifr, '\0', sizeof (ifr));
+ strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
+ if (ioctl(sock_fd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
+ if (! ok_error (errno))
+ error("ioctl (SIOCGIFFLAGS): %m(%d)", errno);
+ return 0;
+ }
+
+ ifr.ifr_flags |= (IFF_UP | IFF_POINTOPOINT);
+ if (ioctl(sock_fd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
+ if (! ok_error (errno))
+ error("ioctl(SIOCSIFFLAGS): %m(%d)", errno);
+ return 0;
+ }
+ if_is_up = 1;
+ return 1;
+}
+
+/********************************************************************
+ *
+ * sifdown - Config the interface down and disable IP.
+ */
+
+int sifdown (int u)
+{
+ struct ifreq ifr;
+
+ if_is_up = 0;
+
+ memset (&ifr, '\0', sizeof (ifr));
+ strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
+ if (ioctl(sock_fd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
+ if (! ok_error (errno))
+ error("ioctl (SIOCGIFFLAGS): %m(%d)", errno);
+ return 0;
+ }
+
+ ifr.ifr_flags &= ~IFF_UP;
+ ifr.ifr_flags |= IFF_POINTOPOINT;
+ if (ioctl(sock_fd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
+ if (! ok_error (errno))
+ error("ioctl(SIOCSIFFLAGS): %m(%d)", errno);
+ return 0;
+ }
+ return 1;
+}
+
+/********************************************************************
+ *
+ * sifaddr - Config the interface IP addresses and netmask.
+ */
+
+int sifaddr (int unit, u_int32_t our_adr, u_int32_t his_adr,
+ u_int32_t net_mask)
+{
+ struct ifreq ifr;
+ struct rtentry rt;
+
+ memset (&ifr, '\0', sizeof (ifr));
+ memset (&rt, '\0', sizeof (rt));
+
+ SET_SA_FAMILY (ifr.ifr_addr, AF_INET);
+ SET_SA_FAMILY (ifr.ifr_dstaddr, AF_INET);
+ SET_SA_FAMILY (ifr.ifr_netmask, AF_INET);
+
+ strlcpy (ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
+/*
+ * Set our IP address
+ */
+ ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = our_adr;
+ if (ioctl(sock_fd, SIOCSIFADDR, (caddr_t) &ifr) < 0) {
+ if (errno != EEXIST) {
+ if (! ok_error (errno))
+ error("ioctl(SIOCSIFADDR): %m(%d)", errno);
}
+ else {
+ warn("ioctl(SIOCSIFADDR): Address already exists");
+ }
+ return (0);
}
+/*
+ * Set the gateway address
+ */
+ ((struct sockaddr_in *) &ifr.ifr_dstaddr)->sin_addr.s_addr = his_adr;
+ if (ioctl(sock_fd, SIOCSIFDSTADDR, (caddr_t) &ifr) < 0) {
+ if (! ok_error (errno))
+ error("ioctl(SIOCSIFDSTADDR): %m(%d)", errno);
+ return (0);
+ }
+/*
+ * Set the netmask.
+ * For recent kernels, force the netmask to 255.255.255.255.
+ */
+ if (kernel_version >= KVERSION(2,1,16))
+ net_mask = ~0L;
+ if (net_mask != 0) {
+ ((struct sockaddr_in *) &ifr.ifr_netmask)->sin_addr.s_addr = net_mask;
+ if (ioctl(sock_fd, SIOCSIFNETMASK, (caddr_t) &ifr) < 0) {
+ if (! ok_error (errno))
+ error("ioctl(SIOCSIFNETMASK): %m(%d)", errno);
+ return (0);
+ }
+ }
+/*
+ * Add the device route
+ */
+ if (kernel_version < KVERSION(2,1,16)) {
+ SET_SA_FAMILY (rt.rt_dst, AF_INET);
+ SET_SA_FAMILY (rt.rt_gateway, AF_INET);
+ rt.rt_dev = ifname;
+
+ ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = 0L;
+ ((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr = his_adr;
+ rt.rt_flags = RTF_UP | RTF_HOST;
+
+ if (kernel_version > KVERSION(2,1,0)) {
+ SET_SA_FAMILY (rt.rt_genmask, AF_INET);
+ ((struct sockaddr_in *) &rt.rt_genmask)->sin_addr.s_addr = -1L;
+ }
- if (ok == 0) {
- driver_version =
- driver_modification =
- driver_patch = 0;
+ if (ioctl(sock_fd, SIOCADDRT, &rt) < 0) {
+ if (! ok_error (errno))
+ error("ioctl(SIOCADDRT) device route: %m(%d)", errno);
+ return (0);
+ }
}
+ return 1;
+}
+
+/********************************************************************
+ *
+ * cifaddr - Clear the interface IP addresses, and delete routes
+ * through the interface if possible.
+ */
+
+int cifaddr (int unit, u_int32_t our_adr, u_int32_t his_adr)
+{
+ struct rtentry rt;
+
+ if (kernel_version < KVERSION(2,1,16)) {
/*
- * Validate the version of the driver against the version that we used.
+ * Delete the route through the device
*/
- decode_version (PPP_VERSION,
- &my_version,
- &my_modification,
- &my_patch);
+ memset (&rt, '\0', sizeof (rt));
- /* The version numbers must match */
- if (driver_version != my_version)
- ok = 0;
-
- /* The modification levels must be legal */
- if (driver_modification < my_modification)
- ok = 0;
+ SET_SA_FAMILY (rt.rt_dst, AF_INET);
+ SET_SA_FAMILY (rt.rt_gateway, AF_INET);
+ rt.rt_dev = ifname;
+
+ ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = 0;
+ ((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr = his_adr;
+ rt.rt_flags = RTF_UP | RTF_HOST;
- if (ok == 0) {
- fprintf(stderr, "Sorry - PPP driver version %d.%d.%d is out of date\n",
- driver_version, driver_modification, driver_patch);
+ if (kernel_version > KVERSION(2,1,0)) {
+ SET_SA_FAMILY (rt.rt_genmask, AF_INET);
+ ((struct sockaddr_in *) &rt.rt_genmask)->sin_addr.s_addr = -1L;
+ }
+
+ if (ioctl(sock_fd, SIOCDELRT, &rt) < 0 && errno != ESRCH) {
+ if (still_ppp() && ! ok_error (errno))
+ error("ioctl(SIOCDELRT) device route: %m(%d)", errno);
+ return (0);
+ }
}
+ return 1;
+}
- close(s);
- return ok;
+/*
+ * get_pty - get a pty master/slave pair and chown the slave side
+ * to the uid given. Assumes slave_name points to >= 16 bytes of space.
+ */
+int
+get_pty(master_fdp, slave_fdp, slave_name, uid)
+ int *master_fdp;
+ int *slave_fdp;
+ char *slave_name;
+ int uid;
+{
+ int i, mfd, sfd = -1;
+ char pty_name[16];
+ struct termios tios;
+
+#ifdef TIOCGPTN
+ /*
+ * Try the unix98 way first.
+ */
+ mfd = open("/dev/ptmx", O_RDWR);
+ if (mfd >= 0) {
+ int ptn;
+ if (ioctl(mfd, TIOCGPTN, &ptn) >= 0) {
+ slprintf(pty_name, sizeof(pty_name), "/dev/pts/%d", ptn);
+ chmod(pty_name, S_IRUSR | S_IWUSR);
+#ifdef TIOCSPTLCK
+ ptn = 0;
+ if (ioctl(mfd, TIOCSPTLCK, &ptn) < 0)
+ warn("Couldn't unlock pty slave %s: %m", pty_name);
+#endif
+ if ((sfd = open(pty_name, O_RDWR)) < 0)
+ warn("Couldn't open pty slave %s: %m", pty_name);
+ }
+ }
+#endif /* TIOCGPTN */
+
+ if (sfd < 0) {
+ /* the old way - scan through the pty name space */
+ for (i = 0; i < 64; ++i) {
+ slprintf(pty_name, sizeof(pty_name), "/dev/pty%c%x",
+ 'p' + i / 16, i % 16);
+ mfd = open(pty_name, O_RDWR, 0);
+ if (mfd >= 0) {
+ pty_name[5] = 't';
+ sfd = open(pty_name, O_RDWR | O_NOCTTY, 0);
+ if (sfd >= 0) {
+ fchown(sfd, uid, -1);
+ fchmod(sfd, S_IRUSR | S_IWUSR);
+ break;
+ }
+ close(mfd);
+ }
+ }
+ }
+
+ if (sfd < 0)
+ return 0;
+
+ strlcpy(slave_name, pty_name, 16);
+ *master_fdp = mfd;
+ *slave_fdp = sfd;
+ if (tcgetattr(sfd, &tios) == 0) {
+ tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB);
+ tios.c_cflag |= CS8 | CREAD;
+ tios.c_iflag = IGNPAR | CLOCAL;
+ tios.c_oflag = 0;
+ tios.c_lflag = 0;
+ if (tcsetattr(sfd, TCSAFLUSH, &tios) < 0)
+ warn("couldn't set attributes on pty: %m");
+ } else
+ warn("couldn't get attributes on pty: %m");
+
+ return 1;
}
+/********************************************************************
+ *
+ * open_loopback - open the device we use for getting packets
+ * in demand mode. Under Linux, we use a pty master/slave pair.
+ */
int
-logwtmp(line, name, host)
- char *line, *name, *host;
+open_ppp_loopback(void)
{
- struct utmp ut;
+ int flags;
+
+ if (new_style_driver) {
+ /* allocate ourselves a ppp unit */
+ ifunit = -1;
+ if (ioctl(ppp_dev_fd, PPPIOCNEWUNIT, &ifunit) < 0)
+ fatal("Couldn't create PPP unit: %m");
+ set_flags(ppp_dev_fd, SC_LOOP_TRAFFIC);
+ set_kdebugflag(kdebugflag);
+ ppp_fd = -1;
+ return ppp_dev_fd;
+ }
- memset (&ut, 0, sizeof (ut));
- (void)strncpy(ut.ut_line, line, sizeof(ut.ut_line));
- (void)strncpy(ut.ut_name, name, sizeof(ut.ut_name));
- (void)strncpy(ut.ut_host, host, sizeof(ut.ut_host));
- (void)time(&ut.ut_time);
-
- pututline (&ut); /* Write the line to the proper place */
- endutent(); /* Indicate operation is complete */
+ if (!get_pty(&master_fd, &slave_fd, loop_name, 0))
+ fatal("No free pty for loopback");
+ SYSDEBUG(("using %s for loopback", loop_name));
+
+ set_ppp_fd(slave_fd);
+
+ flags = fcntl(master_fd, F_GETFL);
+ if (flags == -1 ||
+ fcntl(master_fd, F_SETFL, flags | O_NONBLOCK) == -1)
+ warn("couldn't set master loopback to nonblock: %m(%d)", errno);
+
+ flags = fcntl(ppp_fd, F_GETFL);
+ if (flags == -1 ||
+ fcntl(ppp_fd, F_SETFL, flags | O_NONBLOCK) == -1)
+ warn("couldn't set slave loopback to nonblock: %m(%d)", errno);
+
+ if (ioctl(ppp_fd, TIOCSETD, &ppp_disc) < 0)
+ fatal("ioctl(TIOCSETD): %m(%d)", errno);
+/*
+ * Find out which interface we were given.
+ */
+ if (ioctl(ppp_fd, PPPIOCGUNIT, &ifunit) < 0)
+ fatal("ioctl(PPPIOCGUNIT): %m(%d)", errno);
+/*
+ * Enable debug in the driver if requested.
+ */
+ set_kdebugflag (kdebugflag);
+
+ return master_fd;
+}
+
+/********************************************************************
+ *
+ * restore_loop - reattach the ppp unit to the loopback.
+ *
+ * The kernel ppp driver automatically reattaches the ppp unit to
+ * the loopback if the serial port is set to a line discipline other
+ * than ppp, or if it detects a modem hangup. The former will happen
+ * in disestablish_ppp if the latter hasn't already happened, so we
+ * shouldn't need to do anything.
+ *
+ * Just to be sure, set the real serial port to the normal discipline.
+ */
+
+void
+restore_loop(void)
+{
+ if (new_style_driver) {
+ set_flags(ppp_dev_fd, get_flags(ppp_dev_fd) & SC_LOOP_TRAFFIC);
+ return;
+ }
+ if (ppp_fd != slave_fd) {
+ (void) ioctl(ppp_fd, TIOCSETD, &tty_disc);
+ set_ppp_fd(slave_fd);
+ }
+}
+
+/********************************************************************
+ *
+ * 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(ppp_dev_fd, PPPIOCSNPMODE, (caddr_t) &npi) < 0) {
+ if (! ok_error (errno)) {
+ error("ioctl(PPPIOCSNPMODE, %d, %d): %m (%d)",
+ proto, mode, errno);
+ error("ppp_dev_fd=%d slave_fd=%d\n", ppp_dev_fd, slave_fd);
+ }
+ return 0;
+ }
+ return 1;
+}
+
+\f
+/********************************************************************
+ *
+ * sipxfaddr - Config the interface IPX networknumber
+ */
+
+int sipxfaddr (int unit, unsigned long int network, unsigned char * node )
+{
+ int result = 1;
+
+#ifdef IPX_CHANGE
+ int skfd;
+ struct ifreq ifr;
+ struct sockaddr_ipx *sipx = (struct sockaddr_ipx *) &ifr.ifr_addr;
+
+ skfd = socket (AF_IPX, SOCK_DGRAM, 0);
+ if (skfd < 0) {
+ if (! ok_error (errno))
+ dbglog("socket(AF_IPX): %m (%d)", errno);
+ result = 0;
+ }
+ else {
+ memset (&ifr, '\0', sizeof (ifr));
+ strlcpy (ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
+
+ memcpy (sipx->sipx_node, node, IPX_NODE_LEN);
+ sipx->sipx_family = AF_IPX;
+ sipx->sipx_port = 0;
+ sipx->sipx_network = htonl (network);
+ sipx->sipx_type = IPX_FRAME_ETHERII;
+ sipx->sipx_action = IPX_CRTITF;
+/*
+ * Set the IPX device
+ */
+ if (ioctl(skfd, SIOCSIFADDR, (caddr_t) &ifr) < 0) {
+ result = 0;
+ if (errno != EEXIST) {
+ if (! ok_error (errno))
+ dbglog("ioctl(SIOCSIFADDR, CRTITF): %m (%d)", errno);
+ }
+ else {
+ warn("ioctl(SIOCSIFADDR, CRTITF): Address already exists");
+ }
+ }
+ close (skfd);
+ }
+#endif
+ return result;
+}
+
+/********************************************************************
+ *
+ * cipxfaddr - Clear the information for the IPX network. The IPX routes
+ * are removed and the device is no longer able to pass IPX
+ * frames.
+ */
+
+int cipxfaddr (int unit)
+{
+ int result = 1;
+
+#ifdef IPX_CHANGE
+ int skfd;
+ struct ifreq ifr;
+ struct sockaddr_ipx *sipx = (struct sockaddr_ipx *) &ifr.ifr_addr;
+
+ skfd = socket (AF_IPX, SOCK_DGRAM, 0);
+ if (skfd < 0) {
+ if (! ok_error (errno))
+ dbglog("socket(AF_IPX): %m (%d)", errno);
+ result = 0;
+ }
+ else {
+ memset (&ifr, '\0', sizeof (ifr));
+ strlcpy (ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
+
+ sipx->sipx_type = IPX_FRAME_ETHERII;
+ sipx->sipx_action = IPX_DLTITF;
+ sipx->sipx_family = AF_IPX;
+/*
+ * Set the IPX device
+ */
+ if (ioctl(skfd, SIOCSIFADDR, (caddr_t) &ifr) < 0) {
+ if (! ok_error (errno))
+ info("ioctl(SIOCSIFADDR, IPX_DLTITF): %m (%d)", errno);
+ result = 0;
+ }
+ close (skfd);
+ }
+#endif
+ return result;
+}
+
+/*
+ * Use the hostname as part of the random number seed.
+ */
+int
+get_host_seed()
+{
+ int h;
+ char *p = hostname;
+
+ h = 407;
+ for (p = hostname; *p != 0; ++p)
+ h = h * 37 + *p;
+ return h;
+}
+
+/********************************************************************
+ *
+ * sys_check_options - check the options that the user specified
+ */
+
+int
+sys_check_options(void)
+{
+#ifdef IPX_CHANGE
+/*
+ * Disable the IPX protocol if the support is not present in the kernel.
+ */
+ if (ipxcp_protent.enabled_flag) {
+ struct stat stat_buf;
+ if (!path_to_procfs("/net/ipx_interface")
+ || lstat (route_buffer, &stat_buf) < 0) {
+ error("IPX support is not present in the kernel\n");
+ ipxcp_protent.enabled_flag = 0;
+ }
+ }
+#endif
+ if (demand && driver_is_old) {
+ option_error("demand dialling is not supported by kernel driver "
+ "version %d.%d.%d", driver_version, driver_modification,
+ driver_patch);
+ return 0;
+ }
+ return 1;
}
projects / ppp.git / blobdiff