#include <mntent.h>
#include <signal.h>
#include <fcntl.h>
+#include <ctype.h>
#include <net/if.h>
#include <net/ppp_defs.h>
#include <net/if_arp.h>
-#include <linux/if_ppp.h>
-#include <net/if_route.h>
+#include <net/if_ppp.h>
+#include <net/route.h>
#include <linux/if_ether.h>
#include <netinet/in.h>
#include "ipcp.h"
static int initdisc = -1; /* Initial TTY discipline */
-static int prev_kdebugflag = 0;
-
-static int restore_term; /* 1 => we've munged the terminal */
+static int initfdflags = -1; /* Initial file descriptor flags for fd */
+static int prev_kdebugflag = 0;
+static int has_default_route = 0;
+static int has_proxy_arp = 0;
+static int driver_version = 0;
+static int driver_modification = 0;
+static int driver_patch = 0;
+static int restore_term = 0; /* 1 => we've munged the terminal */
static struct termios inittermios; /* Initial TTY termios */
-int sockfd; /* socket for doing interface ioctls */
+static int sockfd; /* socket for doing interface ioctls */
-static int driver_version = 0;
-static int driver_modification = 0;
-static int driver_patch = 0;
+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 *lock_file;
-#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 (void);
+static void set_flags (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 (void);
+static int get_ether_addr (u_int32_t ipaddr, struct sockaddr *hwaddr);
+static void decode_version (char *buf, int *version, int *mod, int *patch);
+
/*
* SET_SA_FAMILY - set the sa_family field of a struct sockaddr,
memset ((char *) &(addr), '\0', sizeof(addr)); \
addr.sa_family = (family);
+/*
+ * Determine if the PPP connection should still be present.
+ */
+
+extern int hungup;
+#define still_ppp() (hungup == 0)
+
+/*
+ * Functions to read and set the flags value in the device driver
+ */
+
+static int get_flags (void)
+ {
+ int flags;
+
+ if (ioctl(ttyfd, PPPIOCGFLAGS, (caddr_t) &flags) < 0)
+ {
+ syslog(LOG_ERR, "ioctl(PPPIOCGFLAGS): %m");
+ quit();
+ }
+
+ MAINDEBUG ((LOG_DEBUG, "get flags = %x\n", flags));
+ return flags;
+ }
+
+static void set_flags (int flags)
+ {
+ MAINDEBUG ((LOG_DEBUG, "set flags = %x\n", flags));
+
+ if (ioctl(ttyfd, PPPIOCSFLAGS, (caddr_t) &flags) < 0)
+ {
+ syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS, %x): %m", flags);
+ quit();
+ }
+ }
+
/*
* sys_init - System-dependent initialization.
*/
void sys_init(void)
-{
+ {
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) {
+ }
+
+ /* Get an internet socket for doing socket ioctls. */
+ sockfd = socket(AF_INET, SOCK_DGRAM, 0);
+ if (sockfd < 0)
+ {
syslog(LOG_ERR, "Couldn't create IP socket: %m");
die(1);
- }
+ }
+ }
+
+/*
+ * 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)
+ sifdown(0);
+ /* XXX maybe we need to delete the route through the interface */
+ if (has_default_route)
+ cifdefaultroute(0, default_route_gateway);
+ if (has_proxy_arp)
+ cifproxyarp(0, proxy_arp_addr);
}
/*
* note_debug_level - note a change in the debug level.
*/
+
void note_debug_level (void)
-{
- if (debug) {
- syslog(LOG_INFO, "Debug turned ON, Level %d", debug);
+ {
+ if (debug)
+ {
+ MAINDEBUG ((LOG_INFO, "Debug turned ON, Level %d", debug));
setlogmask(LOG_UPTO(LOG_DEBUG));
- } else {
+ }
+ else
+ {
setlogmask(LOG_UPTO(LOG_WARNING));
- }
-}
+ }
+ }
/*
* set_kdebugflag - Define the debugging level for the kernel
*/
int set_kdebugflag (int requested_level)
-{
- if (ioctl(fd, PPPIOCGDEBUG, &prev_kdebugflag) < 0) {
+ {
+ if (ioctl(ttyfd, PPPIOCGDEBUG, &prev_kdebugflag) < 0)
+ {
syslog(LOG_ERR, "ioctl(PPPIOCGDEBUG): %m");
return (0);
- }
-
- if (prev_kdebugflag != requested_level) {
- if (ioctl(fd, PPPIOCSDEBUG, &requested_level) < 0) {
+ }
+
+ if (prev_kdebugflag != requested_level)
+ {
+ if (ioctl(ttyfd, PPPIOCSDEBUG, &requested_level) < 0)
+ {
syslog (LOG_ERR, "ioctl(PPPIOCSDEBUG): %m");
return (0);
- }
- syslog(LOG_INFO, "set kernel debugging level to %d", requested_level);
- }
+ }
+ MAINDEBUG ((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)
-{
+void establish_ppp (int fd)
+ {
int pppdisc = N_PPP;
int sig = SIGIO;
- if (ioctl(fd, TIOCEXCL, 0) < 0) {
+ if (ioctl(fd, TIOCEXCL, 0) < 0)
+ {
syslog (LOG_WARNING, "ioctl(TIOCEXCL): %m");
- }
-
- if (ioctl(fd, TIOCGETD, &initdisc) < 0) {
+ }
+
+ if (ioctl(fd, TIOCGETD, &initdisc) < 0)
+ {
syslog(LOG_ERR, "ioctl(TIOCGETD): %m");
die (1);
- }
+ }
- if (ioctl(fd, TIOCSETD, &pppdisc) < 0) {
+ if (ioctl(fd, TIOCSETD, &pppdisc) < 0)
+ {
syslog(LOG_ERR, "ioctl(TIOCSETD): %m");
die (1);
- }
- if (ioctl(fd, PPPIOCGUNIT, &ifunit) < 0) {
+ }
+
+ if (ioctl(fd, PPPIOCGUNIT, &ifunit) < 0)
+ {
syslog(LOG_ERR, "ioctl(PPPIOCGUNIT): %m");
die (1);
- }
-
+ }
+
set_kdebugflag (kdebugflag);
- syslog (LOG_NOTICE, "Using version %d.%d.%d of PPP driver",
- driver_version, driver_modification, driver_patch);
-}
+ set_flags (get_flags() & ~(SC_RCV_B7_0 | SC_RCV_B7_1 |
+ SC_RCV_EVNP | SC_RCV_ODDP));
+
+ MAINDEBUG ((LOG_NOTICE, "Using version %d.%d.%d of PPP driver",
+ driver_version, driver_modification, driver_patch));
+
+ /*
+ * Set device for non-blocking reads.
+ */
+ 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");
+ }
+ }
/*
* 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 fd)
+ {
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) {
- 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);
- }
- }
+ /* Reset non-blocking mode on the file descriptor. */
+ if (initfdflags != -1 && fcntl(fd, F_SETFL, initfdflags) < 0)
+ syslog(LOG_WARNING, "Couldn't restore device fd flags: %m");
+ initfdflags = -1;
+ if (still_ppp() && initdisc >= 0)
+ {
+ set_kdebugflag (prev_kdebugflag);
+
if (ioctl(fd, TIOCSETD, &initdisc) < 0)
- syslog(LOG_ERR, "ioctl(TIOCSETD): %m");
-
+ {
+ syslog(LOG_WARNING, "ioctl(TIOCSETD): %m");
+ }
+
if (ioctl(fd, TIOCNXCL, 0) < 0)
+ {
syslog (LOG_WARNING, "ioctl(TIOCNXCL): %m");
+ }
+ }
+ initdisc = -1;
+ }
- initdisc = -1;
- }
-}
+/*
+ * clean_check - Fetch the flags for the device and generate
+ * appropriate error messages.
+ */
+void clean_check(void)
+ {
+ if (still_ppp() && initdisc >= 0)
+ {
+ 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 | SC_RCV_B7_1 | SC_RCV_EVNP | SC_RCV_ODDP:
+ s = "nothing was received";
+ break;
+
+ case SC_RCV_B7_0:
+ case SC_RCV_B7_0 | SC_RCV_EVNP:
+ case SC_RCV_B7_0 | SC_RCV_ODDP:
+ case SC_RCV_B7_0 | SC_RCV_ODDP | SC_RCV_EVNP:
+ s = "all had bit 7 set to 1";
+ break;
+
+ case SC_RCV_B7_1:
+ case SC_RCV_B7_1 | SC_RCV_EVNP:
+ case SC_RCV_B7_1 | SC_RCV_ODDP:
+ case SC_RCV_B7_1 | SC_RCV_ODDP | SC_RCV_EVNP:
+ s = "all had bit 7 set to 0";
+ break;
+
+ case SC_RCV_EVNP:
+ s = "all had odd parity";
+ break;
+
+ case SC_RCV_ODDP:
+ s = "all had even parity";
+ break;
+ }
+
+ if (s != NULL)
+ {
+ syslog(LOG_WARNING, "Receive serial link is not"
+ " 8-bit clean:");
+ syslog(LOG_WARNING, "Problem: %s", s);
+ }
+ }
+ }
+ }
+
/*
* List of valid speeds.
*/
+
struct speed {
int speed_int, speed_val;
} speeds[] = {
/*
* Translate from bits/second to a speed_t.
*/
-int translate_speed (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;
+ }
+ }
+ syslog(LOG_WARNING, "speed %d not supported", bps);
+ }
return 0;
-}
+ }
/*
* Translate from a speed_t to bits/second.
*/
-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;
+static int baud_rate_of (int speed)
+ {
+ struct speed *speedp;
+
+ if (speed != 0)
+ {
+ for (speedp = speeds; speedp->speed_int; speedp++)
+ {
+ if (speed == speedp->speed_val)
+ {
+ return speedp->speed_int;
+ }
+ }
+ }
return 0;
-}
+ }
/*
* 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.
*/
+
void set_up_tty (int fd, int local)
-{
+ {
int speed, x;
struct termios tios;
-
- if (tcgetattr(fd, &tios) < 0) {
+
+ if (tcgetattr(fd, &tios) < 0)
+ {
syslog(LOG_ERR, "tcgetattr: %m");
die(1);
- }
-
+ }
+
if (!restore_term)
+ {
inittermios = tios;
-
- tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL);
- if (crtscts == 1)
- tios.c_cflag |= CRTSCTS;
- else if (crtscts < 0)
- tios.c_cflag &= ~CRTSCTS;
-
- tios.c_cflag |= CS8 | CREAD | HUPCL;
-
- if (local || !modem)
- tios.c_cflag |= CLOCAL;
+ }
+
+ 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);
+ }
+
+ switch (crtscts)
+ {
+ case 1:
+ tios.c_cflag |= CRTSCTS;
+ break;
- if (crtscts == 2) {
- tios.c_iflag |= IXOFF;
+ 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 {
+ if (speed)
+ {
+ cfsetospeed (&tios, speed);
+ cfsetispeed (&tios, speed);
+ }
+/*
+ * We can't proceed if the serial port speed is B0,
+ * since that implies that the serial port is disabled.
+ */
+ 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) {
+ if (speed == B0)
+ {
syslog(LOG_ERR, "Baud rate for %s is 0; need explicit baud rate",
devnam);
- die(1);
- }
- }
+ die (1);
+ }
+ }
- if (tcsetattr(fd, TCSAFLUSH, &tios) < 0) {
+ if (tcsetattr(fd, TCSAFLUSH, &tios) < 0)
+ {
syslog(LOG_ERR, "tcsetattr: %m");
die(1);
- }
-
- baud_rate = baud_rate_of(speed);
+ }
+
+ baud_rate = baud_rate_of(speed);
restore_term = TRUE;
-}
+ }
/*
* setdtr - control the DTR line on the serial port.
* This is called from die(), so it shouldn't call die().
*/
+
void setdtr (int fd, int on)
-{
+ {
int modembits = TIOCM_DTR;
- ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits);
-}
+ ioctl(fd, (on ? TIOCMBIS : TIOCMBIC), &modembits);
+ }
/*
* restore_tty - restore the terminal to the saved settings.
*/
-void restore_tty (void)
-{
- if (restore_term) {
- if (!default_device) {
- /*
- * 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.
- */
+void restore_tty (int fd)
+ {
+ if (restore_term)
+ {
+ 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(fd, TCSAFLUSH, &inittermios) < 0)
- if (errno != ENXIO)
+ {
+ if (errno != EIO)
+ {
syslog(LOG_WARNING, "tcsetattr: %m");
- restore_term = 0;
- }
-}
+ }
+ }
+ }
+ }
/*
* 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);
- }
-}
+ 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 (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) {
+ FD_SET(ttyfd, &ready);
+
+ n = select(ttyfd+1, &ready, NULL, &ready, timo);
+ if (n < 0 && errno != EINTR)
+ {
syslog(LOG_ERR, "select: %m");
die(1);
- }
-}
+ }
+ }
/*
* 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);
- if (len < 0) {
- if (errno == EWOULDBLOCK) {
+ len = read(ttyfd, buf, PPP_MTU + PPP_HDRLEN);
+ if (len < 0)
+ {
+ if (errno == EWOULDBLOCK)
+ {
return -1;
- }
- syslog(LOG_ERR, "read(fd): %m");
+ }
+ syslog(LOG_ERR, "read: %m");
die(1);
- }
+ }
return len;
-}
+ }
/*
* 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(sockfd, 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();
- }
+/*
+ * Ensure that the link is still up.
+ */
+ if (still_ppp())
+ {
+/*
+ * Set the MTU and other parameters for the ppp device
+ */
+ memset (&ifr, '\0', sizeof (ifr));
+ strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
+ ifr.ifr_mtu = mtu;
+
+ if (ioctl(sockfd, SIOCSIFMTU, (caddr_t) &ifr) < 0)
+ {
+ syslog(LOG_ERR, "ioctl(SIOCSIFMTU): %m");
+ quit();
+ }
+
+ MAINDEBUG ((LOG_DEBUG, "send_config: asyncmap = %lx\n", asyncmap));
+ if (ioctl(ttyfd, PPPIOCSASYNCMAP, (caddr_t) &asyncmap) < 0)
+ {
+ syslog(LOG_ERR, "ioctl(PPPIOCSASYNCMAP): %m");
+ quit();
+ }
- if (ioctl(fd, 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;
-
- 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 = get_flags();
+ x = pcomp ? x | SC_COMP_PROT : x & ~SC_COMP_PROT;
+ x = accomp ? x | SC_COMP_AC : x & ~SC_COMP_AC;
+ set_flags(x);
+ }
+ }
/*
* ppp_set_xaccm - set the extended transmit ACCM for the interface.
*/
+
void ppp_set_xaccm (int unit, ext_accm accm)
-{
+ {
MAINDEBUG ((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)
+
+ if (ioctl(ttyfd, PPPIOCSXASYNCMAP, accm) < 0 && errno != ENOTTY)
+ {
syslog(LOG_WARNING, "ioctl(set extended ACCM): %m");
-}
+ }
+ }
/*
* 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)
+/*
+ * 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(ttyfd, PPPIOCSMRU, (caddr_t) &mru) < 0)
+ {
syslog(LOG_ERR, "ioctl(PPPIOCSMRU): %m");
+ }
MAINDEBUG ((LOG_DEBUG, "recv_config: asyncmap = %lx\n", asyncmap));
- 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) {
- syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m");
- quit();
- }
+ }
+ x = get_flags();
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();
- }
-}
+ set_flags (x);
+ }
/*
* ccp_test - ask kernel whether a given compression method
* is acceptable for use.
*/
+
int ccp_test (int unit, u_char *opt_ptr, int opt_len, int for_transmit)
{
struct ppp_option_data data;
+ 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;
+ if (ioctl(ttyfd, PPPIOCSCOMPRESS, (caddr_t) &data) >= 0)
+ {
+ return 1;
+ }
+
+ return (errno == ENOBUFS)? 0: -1;
}
/*
void ccp_flags_set (int unit, int isopen, int isup)
{
- int x;
-
- if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0)
- {
- syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m");
- }
- else
+ if (still_ppp())
{
+ int x = get_flags();
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");
- }
+ set_flags (x);
}
}
int ccp_fatal_error (int unit)
{
- int x;
+ int x = get_flags();
- if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0)
- {
- syslog(LOG_ERR, "ioctl(PPPIOCGFLAGS): %m");
- return 0;
- }
return x & SC_DC_FERROR;
}
int sifvjcomp (int u, int vjcomp, int cidcomp, int maxcid)
{
- 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;
- }
+ u_int x = get_flags();
if (vjcomp)
{
- if (ioctl (fd, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0)
+ if (ioctl (ttyfd, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0)
{
syslog (LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
- return 0;
+ 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 (x);
+
return 1;
}
{
struct ifreq ifr;
+ memset (&ifr, '\0', sizeof (ifr));
strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0)
{
syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
return 0;
}
+ if_is_up = 1;
return 1;
}
{
struct ifreq ifr;
+ memset (&ifr, '\0', sizeof (ifr));
strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0)
{
syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
return 0;
}
+ if_is_up = 0;
return 1;
}
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);
/*
* Add the device route
*/
- 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_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;
((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr = his_adr;
rt.rt_flags = RTF_UP | RTF_HOST;
- if (ioctl(sockfd, SIOCDELRT, &rt) < 0)
+ if (ioctl(sockfd, SIOCDELRT, &rt) < 0 && errno != ESRCH)
{
- syslog (LOG_ERR, "ioctl(SIOCDELRT) device route: %m");
- return (0);
+ if (still_ppp())
+ {
+ syslog (LOG_ERR, "ioctl(SIOCDELRT) device route: %m");
+ return (0);
+ }
}
return 1;
}
*/
FILE *route_fd = (FILE *) 0;
-static char route_buffer [100];
+static char route_buffer [512];
static char *path_to_route (void);
static int open_route_table (void);
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)
+ mntent = getmntent (fp);
+ while (mntent != (struct mntent *) 0)
+ {
+ if (strcmp (mntent->mnt_type, MNTTYPE_IGNORE) != 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);
+ 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);
+ }
}
+ mntent = getmntent (fp);
}
fclose (fp);
}
+
syslog (LOG_ERR, "proc file system not mounted");
return 0;
}
+/*
+ * 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;
+ }
+ }
+
/*
* open_route_table - open the interface to the route table
*/
{
char *path;
- if (route_fd != (FILE *) 0)
- {
- close_route_table();
- }
+ close_route_table();
path = path_to_route();
if (path == NULL)
syslog (LOG_ERR, "can not open %s: %m", path);
return 0;
}
-
- /* read and discard the header line. */
- if (fgets (route_buffer, sizeof (route_buffer), route_fd) == (char *) 0)
- {
- close_route_table();
- return 0;
- }
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;
- }
- }
-
/*
* read_route_table - read the next entry from the route table
*/
{
static char delims[] = " \t\n";
char *dev_ptr, *ptr, *dst_ptr, *gw_ptr, *flag_ptr;
+
+ memset (rt, '\0', sizeof (struct rtentry));
- if (fgets (route_buffer, sizeof (route_buffer), route_fd) == (char *) 0)
+ for (;;)
{
- return 0;
- }
-
- memset (rt, '\0', sizeof (struct rtentry));
+ if (fgets (route_buffer, sizeof (route_buffer), route_fd) ==
+ (char *) 0)
+ {
+ 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 */
+ 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 (flag_ptr == (char *) 0) /* assume that we failed, somewhere. */
+ {
+ return 0;
+ }
+
+ /* Discard that stupid header line which should never
+ * have been there in the first place !! */
+ if (isxdigit (*dst_ptr) && isxdigit (*gw_ptr) && isxdigit (*flag_ptr))
+ {
+ break;
+ }
+ }
((struct sockaddr_in *) &rt->rt_dst)->sin_addr.s_addr =
strtoul (dst_ptr, NULL, 16);
while (read_route_table(&rt) != 0)
{
- if (rt.rt_flags & RTF_UP == 0)
+ if ((rt.rt_flags & RTF_UP) == 0)
{
continue;
}
break;
}
}
+
close_route_table();
return result;
}
{
struct rtentry rt;
- if (defaultroute_exists())
+ if (has_default_route == 0)
{
- return 0;
- }
+ if (defaultroute_exists())
+ {
+ return 0;
+ }
- memset (&rt, '\0', sizeof (rt));
- SET_SA_FAMILY (rt.rt_dst, AF_INET);
- SET_SA_FAMILY (rt.rt_gateway, AF_INET);
- ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = gateway;
+ memset (&rt, '\0', sizeof (rt));
+ SET_SA_FAMILY (rt.rt_dst, AF_INET);
+ SET_SA_FAMILY (rt.rt_gateway, AF_INET);
+ ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = gateway;
- rt.rt_flags = RTF_UP | RTF_GATEWAY;
- if (ioctl(sockfd, SIOCADDRT, &rt) < 0)
- {
- syslog (LOG_ERR, "default route ioctl(SIOCADDRT): %m");
- return 0;
+ rt.rt_flags = RTF_UP | RTF_GATEWAY;
+ if (ioctl(sockfd, SIOCADDRT, &rt) < 0)
+ {
+ syslog (LOG_ERR, "default route ioctl(SIOCADDRT): %m");
+ return 0;
+ }
}
+ has_default_route = 1;
+ default_route_gateway = g;
return 1;
}
int cifdefaultroute (int unit, int gateway)
{
struct rtentry rt;
-
- SET_SA_FAMILY (rt.rt_dst, AF_INET);
- SET_SA_FAMILY (rt.rt_gateway, AF_INET);
- ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = gateway;
-
- rt.rt_flags = RTF_UP | RTF_GATEWAY;
- if (ioctl(sockfd, SIOCDELRT, &rt) < 0)
+
+ if (has_default_route)
{
- syslog (LOG_ERR, "default route ioctl(SIOCDELRT): %m");
- return 0;
+ memset (&rt, '\0', sizeof (rt));
+ SET_SA_FAMILY (rt.rt_dst, AF_INET);
+ SET_SA_FAMILY (rt.rt_gateway, AF_INET);
+ ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = gateway;
+
+ rt.rt_flags = RTF_UP | RTF_GATEWAY;
+ if (ioctl(sockfd, SIOCDELRT, &rt) < 0 && errno != ESRCH)
+ {
+ if (still_ppp())
+ {
+ syslog (LOG_ERR, "default route ioctl(SIOCDELRT): %m");
+ return 0;
+ }
+ }
}
+ has_default_route = 0;
return 1;
}
{
struct arpreq arpreq;
- memset (&arpreq, '\0', sizeof(arpreq));
+ if (has_proxy_arp == 0)
+ {
+ memset (&arpreq, '\0', sizeof(arpreq));
/*
* 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 (!get_ether_addr(his_adr, &arpreq.arp_ha))
+ {
+ syslog(LOG_ERR, "Cannot determine ethernet address for proxy ARP");
+ return 0;
+ }
- if (ioctl(sockfd, SIOCSARP, (caddr_t)&arpreq) < 0)
- {
- syslog(LOG_ERR, "ioctl(SIOCSARP): %m");
- 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(sockfd, SIOCSARP, (caddr_t)&arpreq) < 0)
+ {
+ syslog(LOG_ERR, "ioctl(SIOCSARP): %m");
+ return 0;
+ }
}
+
+ proxy_arp_addr = hisaddr;
+ has_proxy_arp = 1;
return 1;
}
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(sockfd, SIOCDARP, (caddr_t)&arpreq) < 0)
+
+ if (has_proxy_arp == 1)
{
- syslog(LOG_WARNING, "ioctl(SIOCDARP): %m");
- return 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;
+ if (ioctl(sockfd, SIOCDARP, (caddr_t)&arpreq) < 0)
+ {
+ syslog(LOG_WARNING, "ioctl(SIOCDARP): %m");
+ return 0;
+ }
}
+ has_proxy_arp = 0;
return 1;
}
* 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)
{
struct ifreq *ifr, *ifend, *ifp;
int i;
syslog(LOG_ERR, "ioctl(SIOCGIFCONF): %m");
return 0;
}
+
MAINDEBUG ((LOG_DEBUG, "proxy arp: scanning %d interfaces for IP %s",
ifc.ifc_len / sizeof(struct ifreq), ip_ntoa(ipaddr)));
/*
ifreq.ifr_name));
/*
* Check that the interface is up, and not point-to-point
- * or loopback.
+ * nor loopback.
*/
if (ioctl(sockfd, 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;
}
{
continue;
}
+
mask = ((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr.s_addr;
MAINDEBUG ((LOG_DEBUG, "proxy arp: interface addr %s mask %lx",
ip_ntoa(ina), ntohl(mask)));
+
if (((ipaddr ^ ina) & mask) != 0)
{
continue;
/*
* Now get the hardware address.
*/
+ memset (&ifreq.ifr_hwaddr, 0, sizeof (struct sockaddr));
if (ioctl (sockfd, SIOCGIFHWADDR, &ifreq) < 0)
{
syslog(LOG_ERR, "SIOCGIFHWADDR(%s): %m", ifreq.ifr_name);
return 0;
}
- hwaddr->sa_family = ARPHRD_ETHER;
- memcpy (&hwaddr->sa_data, &ifreq.ifr_hwaddr.sa_data, ETH_ALEN);
+ memcpy (hwaddr,
+ &ifreq.ifr_hwaddr,
+ sizeof (struct sockaddr));
MAINDEBUG ((LOG_DEBUG,
- "proxy arp: found hwaddr %02x:%02x:%02x:%02x:%02x:%02x",
+ "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;
}
* network as `addr'. If we find any, we OR in their netmask to the
* user-specified netmask.
*/
-u_int32_t
-GetMask(addr)
- u_int32_t addr;
-{
+
+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;
+ {
+ 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.
- */
+/*
+ * Scan through the system's network interfaces.
+ */
ifc.ifc_len = sizeof(ifs);
ifc.ifc_req = ifs;
- if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
+ if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0)
+ {
syslog(LOG_WARNING, "ioctl(SIOCGIFCONF): %m");
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.
- */
+ 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) & nmask) != (addr & nmask))
+ if (((ntohl(ina) ^ addr) & nmask) != 0)
+ {
continue;
- /*
- * Check that the interface is up, and not point-to-point or loopback.
- */
+ }
+/*
+ * Check that the interface is up, and not point-to-point nor loopback.
+ */
strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
+ {
continue;
- if ((ifreq.ifr_flags & (IFF_UP|IFF_POINTOPOINT|IFF_LOOPBACK))
- != IFF_UP)
+ }
+
+ if (((ifreq.ifr_flags ^ FLAGS_GOOD) & FLAGS_MASK) != 0)
+ {
continue;
- /*
- * Get its netmask and OR it into our mask.
- */
+ }
+/*
+ * Get its netmask and OR it into our mask.
+ */
if (ioctl(sockfd, 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;
}
}
+/*
+ * Procedure to determine if the PPP line dicipline is registered.
+ */
+
+int
+ppp_registered(void)
+ {
+ int local_fd;
+ int ppp_disc = N_PPP;
+ int init_disc = -1;
+ int initfdflags;
+
+ local_fd = open(devnam, O_NONBLOCK | O_RDWR, 0);
+ if (local_fd < 0)
+ {
+ syslog(LOG_ERR, "Failed to open %s: %m", devnam);
+ return 0;
+ }
+
+ initfdflags = fcntl(local_fd, F_GETFL);
+ if (initfdflags == -1)
+ {
+ syslog(LOG_ERR, "Couldn't get device fd flags: %m");
+ close (local_fd);
+ return 0;
+ }
+
+ initfdflags &= ~O_NONBLOCK;
+ fcntl(local_fd, F_SETFL, initfdflags);
+/*
+ * Read the initial line dicipline and try to put the device into the
+ * PPP dicipline.
+ */
+ if (ioctl(local_fd, TIOCGETD, &init_disc) < 0)
+ {
+ syslog(LOG_ERR, "ioctl(TIOCGETD): %m");
+ close (local_fd);
+ return 0;
+ }
+
+ if (ioctl(local_fd, TIOCSETD, &ppp_disc) < 0)
+ {
+ syslog(LOG_ERR, "ioctl(TIOCSETD): %m");
+ close (local_fd);
+ return 0;
+ }
+
+ if (ioctl(local_fd, TIOCSETD, &init_disc) < 0)
+ {
+ syslog(LOG_ERR, "ioctl(TIOCSETD): %m");
+ close (local_fd);
+ return 0;
+ }
+
+ close (local_fd);
+ return 1;
+ }
+
/*
* ppp_available - check whether the system has any ppp interfaces
* (in fact we check whether we can do an ioctl on ppp0).
{
int s, ok;
struct ifreq ifr;
- int my_version, my_modification, my_patch;
+ char abBuffer [1024];
+ int size;
+ int my_version, my_modification, my_patch;
/*
* Open a socket for doing the ioctl operations.
*/
strncpy (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())
+ {
+ strncpy (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;
}
+
+ if (!ok)
+ {
+ return 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;
-
- ifr.ifr_data = abBuffer;
- size = ioctl (s, SIOCGPPPVER, (caddr_t) &ifr);
- ok = size >= 0;
+ ifr.ifr_data = abBuffer;
+ size = ioctl (s, SIOCGPPPVER, (caddr_t) &ifr);
+ ok = size >= 0;
- if (ok != 0)
- {
- decode_version (abBuffer,
- &driver_version,
- &driver_modification,
- &driver_patch);
- }
+ if (ok)
+ {
+ decode_version (abBuffer,
+ &driver_version,
+ &driver_modification,
+ &driver_patch);
}
- if (ok == 0)
+ if (!ok)
{
driver_version =
driver_modification =
ok = 0;
}
- if (ok == 0)
+ if (!ok)
{
fprintf(stderr, "Sorry - PPP driver version %d.%d.%d is out of date\n",
driver_version, driver_modification, driver_patch);
+ close (s);
+ exit (1);
}
close(s);
return ok;
}
+/*
+ * Update the wtmp file with the appropriate user name and tty device.
+ */
+
int logwtmp (char *line, char *name, char *host)
{
struct utmp ut;
/*
* lock - create a lock file for the named device
*/
-int
-lock(dev)
- char *dev;
-{
+
+int lock (char *dev)
+ {
char hdb_lock_buffer[12];
int fd, pid, n;
char *p;
- if ((p = strrchr(dev, '/')) != NULL)
- dev = p + 1;
+ p = strrchr(dev, '/');
+ if (p != NULL)
+ {
+ dev = ++p;
+ }
+
lock_file = malloc(strlen(LOCK_PREFIX) + strlen(dev) + 1);
if (lock_file == NULL)
+ {
novm("lock file name");
- strcat(strcpy(lock_file, LOCK_PREFIX), dev);
+ }
+
+ strcpy (lock_file, LOCK_PREFIX);
+ strcat (lock_file, dev);
+/*
+ * Attempt to create the lock file at this point.
+ */
+ while (1)
+ {
+ fd = open(lock_file, O_EXCL | O_CREAT | O_RDWR, 0644);
+ if (fd >= 0)
+ {
+ sprintf(hdb_lock_buffer, "%010d\n", getpid());
+ write(fd, hdb_lock_buffer, 11);
+ close(fd);
+ return 0;
+ }
+/*
+ * If the file exists then check to see if the pid is stale
+ */
+ if (errno == EEXIST)
+ {
+ fd = open(lock_file, O_RDONLY, 0);
+ if (fd < 0)
+ {
+ if (errno == ENOENT) /* This is just a timing problem. */
+ {
+ continue;
+ }
+ break;
+ }
- while ((fd = open(lock_file, O_EXCL | O_CREAT | O_RDWR, 0644)) < 0) {
- if (errno == EEXIST
- && (fd = open(lock_file, O_RDONLY, 0)) >= 0) {
/* Read the lock file to find out who has the device locked */
- n = read(fd, hdb_lock_buffer, 11);
- if (n > 0) {
- hdb_lock_buffer[n] = 0;
- sscanf (hdb_lock_buffer, " %d", &pid);
- }
- if (n <= 0) {
+ n = read (fd, hdb_lock_buffer, 11);
+ close (fd);
+ if (n < 0)
+ {
syslog(LOG_ERR, "Can't read pid from lock file %s", lock_file);
- close(fd);
- } else {
- if (kill(pid, 0) == -1 && errno == ESRCH) {
- /* pid no longer exists - remove the lock file */
- if (unlink(lock_file) == 0) {
- close(fd);
- syslog(LOG_NOTICE, "Removed stale lock on %s (pid %d)",
- dev, pid);
- continue;
- } else
- syslog(LOG_WARNING, "Couldn't remove stale lock on %s",
- dev);
- } else
- syslog(LOG_NOTICE, "Device %s is locked by pid %d",
- dev, pid);
- }
- close(fd);
- } else
- syslog(LOG_ERR, "Can't create lock file %s: %m", lock_file);
- free(lock_file);
- lock_file = NULL;
- return -1;
- }
+ break;
+ }
- sprintf(hdb_lock_buffer, "%010d\n", getpid());
- write(fd, hdb_lock_buffer, 11);
+ /* See the process still exists. */
+ if (n > 0)
+ {
+ hdb_lock_buffer[n] = '\0';
+ sscanf (hdb_lock_buffer, " %d", &pid);
+ if (kill(pid, 0) == -1 && errno == ESRCH)
+ {
+ n = 0;
+ }
+ }
- close(fd);
- return 0;
+ /* If the process does not exist then try to remove the lock */
+ if (n == 0 && unlink (lock_file) == 0)
+ {
+ syslog (LOG_NOTICE, "Removed stale lock on %s (pid %d)",
+ dev, pid);
+ continue;
+ }
+
+ syslog (LOG_NOTICE, "Device %s is locked by pid %d", dev, pid);
+ break;
+ }
+
+ syslog(LOG_ERR, "Can't create lock file %s: %m", lock_file);
+ break;
+ }
+
+ free(lock_file);
+ lock_file = NULL;
+ return -1;
}
/*
* unlock - remove our lockfile
*/
-unlock()
-{
- if (lock_file) {
+
+void unlock(void)
+ {
+ if (lock_file)
+ {
unlink(lock_file);
free(lock_file);
lock_file = NULL;
- }
-}
+ }
+ }
projects / ppp.git / blobdiff