* TODO:
*/
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/time.h>
+#include <sys/errno.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 <net/if.h>
-#include <linux/ppp.h>
-#include <linux/route.h>
+#include <net/ppp_defs.h>
+#include <net/if_arp.h>
+#include <net/if_ppp.h>
+#include <net/route.h>
#include <linux/if_ether.h>
#include <netinet/in.h>
-#include <net/if_ppp.h>
#include "pppd.h"
-#include "ppp.h"
#include "fsm.h"
#include "ipcp.h"
static int initdisc = -1; /* Initial TTY discipline */
-static int prev_kdebugflag = 0;
-extern int kdebugflag;
-extern u_long netmask;
+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 char *lock_file;
#define MAX_IFS 32
-/* prototypes */
-void die __ARGS((int));
+#define FLAGS_GOOD (IFF_UP | IFF_BROADCAST)
+#define FLAGS_MASK (IFF_UP | IFF_BROADCAST | \
+ IFF_POINTOPOINT | IFF_LOOPBACK | IFF_NOARP)
/*
* 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(fd, 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(fd, 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 ioctls. */
+ sockfd = socket(AF_INET, SOCK_DGRAM, 0);
+ if (sockfd < 0)
+ {
+ syslog(LOG_ERR, "Couldn't create IP socket: %m");
+ die(1);
+ }
+ }
+
+/*
+ * note_debug_level - note a change in the debug level.
+ */
+
+void note_debug_level (void)
+ {
+ if (debug)
+ {
+ MAINDEBUG ((LOG_INFO, "Debug turned ON, Level %d", debug));
+ setlogmask(LOG_UPTO(LOG_DEBUG));
+ }
+ 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(fd, 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(fd, 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)
-{
+ {
int pppdisc = N_PPP;
- int sig = SIGIO;
+ 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);
- /*
- * Set the device to give us a SIGIO when data is available.
- */
- if (ioctl(fd, PPPIOCSINPSIG, &sig) == -1) {
- syslog(LOG_ERR, "ioctl(PPPIOCSINPSIG): %m");
- die(1);
- }
-}
+ 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));
+ }
/*
* disestablish_ppp - Restore the serial port to normal operation.
*/
void disestablish_ppp(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 this is no longer PPP mode then there is nothing that can be done
+ * about restoring the previous mode.
+ */
+ if (!still_ppp())
+ {
+ initdisc = -1;
+ return;
+ }
+/*
+ * Check whether the link seems not to be 8-bit clean.
+ */
+ if (initdisc >= 0)
+ {
+ 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)) {
+ 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:
- s = "bit 7 set to 1";
+ 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:
- s = "bit 7 set to 0";
+ 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 = "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);
- }
- }
+ }
- if (ioctl(fd, TIOCSETD, &initdisc) < 0)
- syslog(LOG_ERR, "ioctl(TIOCSETD): %m");
+ if (s != NULL)
+ {
+ syslog(LOG_WARNING, "Receive serial link is not 8-bit clean:");
+ syslog(LOG_WARNING, "Problem: %s", s);
+ }
+ }
- if (ioctl(fd, TIOCNXCL, 0) < 0)
- syslog (LOG_WARNING, "ioctl(TIOCNXCL): %m");
+ set_kdebugflag (prev_kdebugflag);
+
+ 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;
+ }
+ }
- initdisc = -1;
- }
-}
+/*
+ * List of valid speeds.
+ */
+
+struct speed {
+ int speed_int, speed_val;
+} speeds[] = {
+#ifdef B50
+ { 50, B50 },
+#endif
+#ifdef B75
+ { 75, B75 },
+#endif
+#ifdef B110
+ { 110, B110 },
+#endif
+#ifdef B134
+ { 134, B134 },
+#endif
+#ifdef B150
+ { 150, B150 },
+#endif
+#ifdef B200
+ { 200, B200 },
+#endif
+#ifdef B300
+ { 300, B300 },
+#endif
+#ifdef B600
+ { 600, B600 },
+#endif
+#ifdef B1200
+ { 1200, B1200 },
+#endif
+#ifdef B1800
+ { 1800, B1800 },
+#endif
+#ifdef B2000
+ { 2000, B2000 },
+#endif
+#ifdef B2400
+ { 2400, B2400 },
+#endif
+#ifdef B3600
+ { 3600, B3600 },
+#endif
+#ifdef B4800
+ { 4800, B4800 },
+#endif
+#ifdef B7200
+ { 7200, B7200 },
+#endif
+#ifdef B9600
+ { 9600, B9600 },
+#endif
+#ifdef B19200
+ { 19200, B19200 },
+#endif
+#ifdef B38400
+ { 38400, B38400 },
+#endif
+#ifdef EXTA
+ { 19200, EXTA },
+#endif
+#ifdef EXTB
+ { 38400, EXTB },
+#endif
+#ifdef B57600
+ { 57600, B57600 },
+#endif
+#ifdef B115200
+ { 115200, B115200 },
+#endif
+ { 0, 0 }
+};
+
+/*
+ * Translate from bits/second to a speed_t.
+ */
+
+int translate_speed (int bps)
+ {
+ struct speed *speedp;
+
+ 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)
+ {
+ 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)
+ {
+ syslog(LOG_ERR, "tcgetattr: %m");
+ die(1);
+ }
+
+ 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);
+ }
+
+ switch (crtscts)
+ {
+ case 1:
+ tios.c_cflag |= CRTSCTS;
+ break;
+
+ case 2:
+ tios.c_iflag |= 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);
+ }
+/*
+ * 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)
+ {
+ syslog(LOG_ERR, "Baud rate for %s is 0; need explicit baud rate",
+ devnam);
+ die (1);
+ }
+ }
+
+ if (tcsetattr(fd, TCSAFLUSH, &tios) < 0)
+ {
+ syslog(LOG_ERR, "tcsetattr: %m");
+ die(1);
+ }
+
+ 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);
+ }
+
+/*
+ * restore_tty - restore the terminal to the saved settings.
+ */
+
+void restore_tty (void)
+ {
+ 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 != EIO)
+ {
+ syslog(LOG_WARNING, "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) {
+ if (write(fd, p, len) < 0)
+ {
syslog(LOG_ERR, "write: %m");
die(1);
- }
-}
+ }
+ }
+
+/*
+ * wait_input - wait until there is data available on fd,
+ * 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)
+ {
+ 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, MTU + DLLHEADERLEN);
- if (len < 0) {
- if (errno == EWOULDBLOCK) {
-#if 0
- MAINDEBUG((LOG_DEBUG, "read(fd): EWOULDBLOCK"));
-#endif
+ len = read(fd, buf, PPP_MTU + PPP_HDRLEN);
+ if (len < 0)
+ {
+ if (errno == EWOULDBLOCK)
+ {
return -1;
- }
+ }
syslog(LOG_ERR, "read(fd): %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_long asyncmap,int pcomp,int accomp)
-{
+
+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));
+/*
+ * 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 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(s, SIOCSIFMTU, (caddr_t) &ifr) < 0) {
+
+ 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) {
+ if (ioctl(fd, 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 = get_flags();
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();
- }
-}
+ set_flags(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",
accm[0], accm[1], accm[2], accm[3]));
+
if (ioctl(fd, 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_long asyncmap,int pcomp,int accomp)
-{
+
+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 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(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");
+ if (ioctl(fd, 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;
+ }
+
+/*
+ * ccp_flags_set - inform kernel about the current state of CCP.
+ */
+
+void ccp_flags_set (int unit, int isopen, int isup)
+ {
+ 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;
+ set_flags (x);
+ }
+ }
+
+/*
+ * 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 ccp_fatal_error (int unit)
+ {
+ int x = get_flags();
+
+ return x & SC_DC_FERROR;
+ }
/*
* sifvjcomp - config tcp header compression
*/
int sifvjcomp (int u, int vjcomp, int cidcomp, int maxcid)
-{
- u_int x;
+ {
+ u_int x = get_flags();
- if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
- syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m");
- return 0;
- }
+ if (vjcomp)
+ {
+ if (ioctl (fd, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0)
+ {
+ syslog (LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
+ vjcomp = 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;
- }
- }
+ set_flags (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));
strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
- if (ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
+ if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0)
+ {
syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m");
return 0;
- }
+ }
ifr.ifr_flags |= (IFF_UP | IFF_POINTOPOINT);
- if (ioctl(s, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
+ if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0)
+ {
syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
return 0;
- }
+ }
return 1;
-}
+ }
/*
* sifdown - Config the interface down and disable IP.
*/
int sifdown (int u)
-{
+ {
struct ifreq ifr;
+ memset (&ifr, '\0', sizeof (ifr));
strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
- if (ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
+ if (ioctl(sockfd, 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) {
+ if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0)
+ {
syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
return 0;
- }
+ }
return 1;
-}
+ }
/*
* sifaddr - Config the interface IP addresses and netmask.
*/
int sifaddr (int unit, int our_adr, int his_adr, int 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);
* 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 (ioctl(sockfd, 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) {
+ if (ioctl(sockfd, SIOCSIFDSTADDR, (caddr_t) &ifr) < 0)
+ {
syslog (LOG_ERR, "ioctl(SIOCSIFDSTADDR): %m");
return (0);
- }
+ }
/*
* Set the netmask
*/
- if (net_mask != 0) {
+ if (net_mask != 0)
+ {
((struct sockaddr_in *) &ifr.ifr_netmask)->sin_addr.s_addr = net_mask;
- if (ioctl(s, SIOCSIFNETMASK, (caddr_t) &ifr) < 0) {
+ if (ioctl(sockfd, SIOCSIFNETMASK, (caddr_t) &ifr) < 0)
+ {
syslog (LOG_ERR, "ioctl(SIOCSIFNETMASK): %m");
return (0);
- }
- }
+ }
+ }
/*
* 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;
- if (ioctl(s, SIOCADDRT, &rt) < 0) {
+ if (ioctl(sockfd, SIOCADDRT, &rt) < 0)
+ {
syslog (LOG_ERR, "ioctl(SIOCADDRT) device route: %m");
return (0);
- }
+ }
return 1;
-}
+ }
/*
* cifaddr - Clear the interface IP addresses, and delete routes
*/
int cifaddr (int unit, int our_adr, int his_adr)
-{
+ {
struct rtentry rt;
/*
* Delete the route through the device
((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) {
+ if (ioctl(sockfd, SIOCDELRT, &rt) < 0)
+ {
syslog (LOG_ERR, "ioctl(SIOCDELRT) device route: %m");
return (0);
- }
+ }
return 1;
-}
+ }
/*
* path_to_route - determine the path to the proc file system data
*/
static char *path_to_route (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);
- }
- }
+ if (fp != 0)
+ {
+ mntent = getmntent (fp);
+ while (mntent != (struct mntent *) 0)
+ {
+ if (strcmp (mntent->mnt_type, MNTTYPE_IGNORE) != 0)
+ {
+ 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
*/
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) {
+ if (route_fd == (FILE *) 0)
+ {
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) {
+ 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 int read_route_table (struct rtentry *rt)
-{
+ {
static char delims[] = " \t\n";
char *dev_ptr, *ptr, *dst_ptr, *gw_ptr, *flag_ptr;
if (fgets (route_buffer, sizeof (route_buffer), route_fd) == (char *) 0)
+ {
return 0;
+ }
memset (rt, '\0', sizeof (struct rtentry));
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
((struct sockaddr_in *) &rt->rt_dst)->sin_addr.s_addr =
strtoul (dst_ptr, NULL, 16);
rt->rt_dev = dev_ptr;
return 1;
-}
+ }
/*
* defaultroute_exists - determine if there is a default route
*/
static int defaultroute_exists (void)
-{
+ {
struct rtentry rt;
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) {
+ 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,
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)
-{
+ {
struct rtentry rt;
- if (defaultroute_exists())
- return 0;
+ if (has_default_route == 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(s, 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;
return 1;
-}
+ }
/*
* cifdefaultroute - delete a default route through the address given.
*/
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;
+
+ if (has_default_route)
+ {
+ 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(s, SIOCDELRT, &rt) < 0) {
- syslog (LOG_ERR, "default route ioctl(SIOCDELRT): %m");
- return 0;
- }
+ rt.rt_flags = RTF_UP | RTF_GATEWAY;
+ if (ioctl(sockfd, SIOCDELRT, &rt) < 0)
+ {
+ if (errno != ENOENT || still_ppp())
+ {
+ syslog (LOG_ERR, "default route ioctl(SIOCDELRT): %m");
+ return 0;
+ }
+ }
+ }
+ has_default_route = 0;
return 1;
-}
+ }
/*
* sifproxyarp - Make a proxy ARP entry for the peer.
*/
-int sifproxyarp (int unit, u_long his_adr)
-{
+int sifproxyarp (int unit, u_int32_t his_adr)
+ {
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(s, 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;
+ }
+ }
+
+ has_proxy_arp = 1;
return 1;
-}
+ }
/*
* cifproxyarp - Delete the proxy ARP entry for the peer.
*/
-int cifproxyarp (int unit, u_long his_adr)
-{
+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);
+
+ if (has_proxy_arp == 1)
+ {
+ 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;
- }
+ ((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;
-}
+ }
/*
* get_ether_addr - get the hardware address of an interface on the
* the same subnet as ipaddr.
*/
-int get_ether_addr (u_long ipaddr, struct sockaddr *hwaddr)
-{
+int get_ether_addr (u_int32_t ipaddr, struct sockaddr *hwaddr)
+ {
struct ifreq *ifr, *ifend, *ifp;
int i;
- u_long ina, mask;
+ u_int32_t ina, mask;
struct sockaddr_dl *dla;
struct ifreq ifreq;
struct ifconf ifc;
ifc.ifc_len = sizeof(ifs);
ifc.ifc_req = ifs;
- if (ioctl(s, SIOCGIFCONF, &ifc) < 0) {
+ if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0)
+ {
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)));
/*
* address on the same subnet as `ipaddr'.
*/
ifend = ifs + (ifc.ifc_len / sizeof(struct ifreq));
- for (ifr = ifc.ifc_req; ifr < ifend; ifr++) {
- if (ifr->ifr_addr.sa_family == AF_INET) {
+ 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",
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(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;
+ }
/*
* Get its netmask and check that it's on the right subnet.
*/
- if (ioctl(s, SIOCGIFNETMASK, &ifreq) < 0)
+ if (ioctl(sockfd, 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",
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);
/*
* Now get the hardware address.
*/
- if (ioctl (s, SIOCGIFHWADDR, &ifreq) < 0) {
+ 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, &ifr->ifr_hwaddr, ETH_ALEN);
+ memcpy (hwaddr,
+ &ifreq.ifr_hwaddr,
+ sizeof (struct sockaddr));
MAINDEBUG ((LOG_DEBUG,
- "proxy arp: found hwaddr %02x:%02x:%02x:%02x:%02x:%02x",
- (int) ((unsigned char *) &ifr->ifr_hwaddr)[0],
- (int) ((unsigned char *) &ifr->ifr_hwaddr)[1],
- (int) ((unsigned char *) &ifr->ifr_hwaddr)[2],
- (int) ((unsigned char *) &ifr->ifr_hwaddr)[3],
- (int) ((unsigned char *) &ifr->ifr_hwaddr)[4],
- (int) ((unsigned char *) &ifr->ifr_hwaddr)[5]));
+ "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)[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(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.
+ */
+ 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.
+ */
+ strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
+ if (ioctl(sockfd, 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(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;
+
+ 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 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
*/
int ppp_available(void)
-{
+ {
int s, ok;
struct ifreq ifr;
-
+ char abBuffer [1024];
+ int size;
+ int my_version, my_modification, my_patch;
+/*
+ * Open a socket for doing the ioctl operations.
+ */
s = socket(AF_INET, SOCK_DGRAM, 0);
if (s < 0)
- return 1; /* can't tell - maybe we're not root */
+ {
+ return 0;
+ }
- strncpy(ifr.ifr_name, "ppp0", sizeof (ifr.ifr_name));
+ strncpy (ifr.ifr_name, "ppp0", sizeof (ifr.ifr_name));
ok = ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) >= 0;
- close(s);
+/*
+ * 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)
+ {
+ ok = ioctl (s, SIOCGIFHWADDR, (caddr_t) &ifr) >= 0;
+ }
+
+ 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.
+ */
+ ifr.ifr_data = abBuffer;
+ size = ioctl (s, SIOCGPPPVER, (caddr_t) &ifr);
+ ok = size >= 0;
+
+ if (ok)
+ {
+ decode_version (abBuffer,
+ &driver_version,
+ &driver_modification,
+ &driver_patch);
+ }
+
+ if (!ok)
+ {
+ driver_version =
+ driver_modification =
+ driver_patch = 0;
+ }
+/*
+ * Validate the version of the driver against the version that we used.
+ */
+ decode_version (PPP_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 < my_modification)
+ {
+ 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;
-}
+ }
-int
-logwtmp(line, name, host)
- char *line, *name, *host;
-{
- struct utmp ut;
+/*
+ * Update the wtmp file with the appropriate user name and tty device.
+ */
+int logwtmp (char *line, char *name, char *host)
+ {
+ struct utmp ut;
+ int mode;
+/*
+ * Control the 'mesg' function based upon the state of the logon
+ * operation.
+ */
+ mode = (*name != '\0') ? 0600 : 0622;
+ if (chmod (devnam, mode) < 0)
+ {
+ syslog (LOG_ERR, "chmod(\"%s\", 0%o): %m", devnam, mode);
+ }
+/*
+ * Update the signon database for users.
+ */
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));
pututline (&ut); /* Write the line to the proper place */
endutent(); /* Indicate operation is complete */
+ }
+
+/*
+ * Code for locking/unlocking the serial device.
+ * This code is derived from chat.c.
+ */
+
+#define LOCK_PREFIX "/var/lock/LCK.."
+
+/*
+ * lock - create a lock file for the named device
+ */
+
+int lock (char *dev)
+ {
+ char hdb_lock_buffer[12];
+ int fd, pid, n;
+ char *p;
+
+ 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");
+ }
+
+ 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;
+ }
+
+ /* Read the lock file to find out who has the device locked */
+ 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);
+ break;
+ }
+
+ /* 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;
+ }
+ }
+
+ /* 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
+ */
+
+void unlock(void)
+ {
+ if (lock_file)
+ {
+ unlink(lock_file);
+ free(lock_file);
+ lock_file = NULL;
+ }
+ }
projects / ppp.git / blobdiff