#include <stdio.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 <mntent.h>
#include <net/if.h>
+#include <net/ppp_defs.h>
+#include <net/if_arp.h>
#include <linux/ppp.h>
#include <linux/route.h>
#include <linux/if_ether.h>
#include <netinet/in.h>
-#include <net/if_ppp.h>
+#include <signal.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;
-#define MAX_IFS 32
+static int restore_term; /* 1 => we've munged the terminal */
+static struct termios inittermios; /* Initial TTY termios */
+
+int sockfd; /* socket for doing interface ioctls */
+
+static int driver_version = 0;
+static int driver_modification = 0;
+static int driver_patch = 0;
-/* prototypes */
-void die __ARGS((int));
+static char *lock_file;
+
+#define MAX_IFS 32
/*
* SET_SA_FAMILY - set the sa_family field of a struct sockaddr,
memset ((char *) &(addr), '\0', sizeof(addr)); \
addr.sa_family = (family);
+/*
+ * 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) {
+ syslog(LOG_ERR, "Couldn't create IP socket: %m");
+ die(1);
+ }
+}
+
+/*
+ * 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;
+
+ if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
+ syslog(LOG_ERR, "ioctl(PPPIOCGFLAGS): %m");
+ return 0;
+ }
+ return x & SC_DC_FERROR;
+}
+
+/*
+ * 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);
+ setlogmask(LOG_UPTO(LOG_DEBUG));
+ } else {
+ setlogmask(LOG_UPTO(LOG_WARNING));
+ }
+}
+
/*
* set_kdebugflag - Define the debugging level for the kernel
*/
void establish_ppp (void)
{
int pppdisc = N_PPP;
+ int sig = SIGIO;
if (ioctl(fd, TIOCEXCL, 0) < 0) {
syslog (LOG_WARNING, "ioctl(TIOCEXCL): %m");
syslog(LOG_ERR, "ioctl(TIOCSETD): %m");
die (1);
}
-
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);
}
/*
}
}
- if (ioctl(fd, TIOCSETD, &initdisc) < 0)
- syslog(LOG_ERR, "ioctl(TIOCSETD): %m");
+ 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;
+ }
+}
+
+/*
+ * List of valid speeds.
+ */
+struct speed {
+ unsigned int speed_int;
+ int speed_val;
+} speeds[] = {
+#ifdef B50
+ { 50U, B50 },
+#endif
+#ifdef B75
+ { 75U, B75 },
+#endif
+#ifdef B110
+ { 110U, B110 },
+#endif
+#ifdef B134
+ { 134U, B134 },
+#endif
+#ifdef B150
+ { 150U, B150 },
+#endif
+#ifdef B200
+ { 200U, B200 },
+#endif
+#ifdef B300
+ { 300U, B300 },
+#endif
+#ifdef B600
+ { 600U, B600 },
+#endif
+#ifdef B1200
+ { 1200U, B1200 },
+#endif
+#ifdef B1800
+ { 1800U, B1800 },
+#endif
+#ifdef B2000
+ { 2000U, B2000 },
+#endif
+#ifdef B2400
+ { 2400U, B2400 },
+#endif
+#ifdef B3600
+ { 3600U, B3600 },
+#endif
+#ifdef B4800
+ { 4800U, B4800 },
+#endif
+#ifdef B7200
+ { 7200U, B7200 },
+#endif
+#ifdef B9600
+ { 9600U, B9600 },
+#endif
+#ifdef B19200
+ { 19200U, B19200 },
+#endif
+#ifdef B38400
+ { 38400U, B38400 },
+#endif
+#ifdef EXTA
+ { 19200U, EXTA },
+#endif
+#ifdef EXTB
+ { 38400U, EXTB },
+#endif
+#ifdef B57600
+ { 57600U, B57600 },
+#endif
+#ifdef B115200
+ { 115200U, B115200 },
+#endif
+ { 0U, 0 }
+};
+
+/*
+ * Translate from bits/second to a speed_t.
+ */
+int translate_speed (unsigned int bps)
+{
+ struct speed *speedp;
+
+ if (bps == 0U)
+ return 0;
+ for (speedp = speeds; speedp->speed_int; speedp++)
+ if (bps == speedp->speed_int)
+ return speedp->speed_val;
+ syslog(LOG_WARNING, "speed %u not supported", bps);
+ return 0;
+}
+
+/*
+ * Translate from a speed_t to bits/second.
+ */
+
+unsigned 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;
+ 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)
+{
+ unsigned int speed;
+ int 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 | CRTSCTS);
+ if (crtscts == 1)
+ tios.c_cflag |= CRTSCTS;
+
+ 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 */
+ tios.c_cc[VSTART] = 0x11; /* DC1 = XON = ^Q */
+ }
+
+ 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);
+ }
+ }
+
+ 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;
- if (ioctl(fd, TIOCNXCL, 0) < 0)
- syslog (LOG_WARNING, "ioctl(TIOCNXCL): %m");
+ ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits);
+}
- initdisc = -1;
+/*
+ * restore_tty - restore the terminal to the saved settings.
+ */
+void restore_tty(void)
+{
+ if (restore_term) {
+ if (tcsetattr(fd, TCSAFLUSH, &inittermios) < 0)
+ if (errno != ENXIO)
+ syslog(LOG_WARNING, "tcsetattr: %m");
+ restore_term = 0;
}
}
}
}
+/*
+ * 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 len;
- len = read(fd, buf, MTU + DLLHEADERLEN);
+ len = read(fd, buf, PPP_MTU + PPP_HDRLEN);
if (len < 0) {
if (errno == EWOULDBLOCK) {
-#if 0
- MAINDEBUG((LOG_DEBUG, "read(fd): EWOULDBLOCK"));
-#endif
return -1;
}
syslog(LOG_ERR, "read(fd): %m");
* 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));
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();
}
/*
* 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]));
* 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;
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();
}
}
}
+/*
+ * 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;
+
+ 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)
+{
+ int x;
+
+ 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");
+}
+
/*
* sifvjcomp - config tcp header compression
*/
struct ifreq 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;
}
struct ifreq 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;
}
* 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
* 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);
}
*/
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);
}
((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);
}
((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);
}
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);
+ strtoul (dst_ptr, NULL, 16); /* network order */
((struct sockaddr_in *) &rt->rt_gateway)->sin_addr.s_addr =
- strtoul (gw_ptr, NULL, 16);
+ strtoul (gw_ptr, NULL, 16); /* network order */
rt->rt_flags = (short) strtoul (flag_ptr, NULL, 16);
rt->rt_dev = dev_ptr;
((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = gateway;
rt.rt_flags = RTF_UP | RTF_GATEWAY;
- if (ioctl(s, SIOCADDRT, &rt) < 0) {
+ if (ioctl(sockfd, SIOCADDRT, &rt) < 0) {
syslog (LOG_ERR, "default route ioctl(SIOCADDRT): %m");
return 0;
}
((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = gateway;
rt.rt_flags = RTF_UP | RTF_GATEWAY;
- if (ioctl(s, SIOCDELRT, &rt) < 0) {
+ if (ioctl(sockfd, SIOCDELRT, &rt) < 0) {
syslog (LOG_ERR, "default route ioctl(SIOCDELRT): %m");
return 0;
}
* 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;
((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) {
+ if (ioctl(sockfd, SIOCSARP, (caddr_t)&arpreq) < 0) {
syslog(LOG_ERR, "ioctl(SIOCSARP): %m");
return 0;
}
* 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;
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) {
+ if (ioctl(sockfd, SIOCDARP, (caddr_t)&arpreq) < 0) {
syslog(LOG_WARNING, "ioctl(SIOCDARP): %m");
return 0;
}
* 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;
}
* Check that the interface is up, and not point-to-point
* or 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))
/*
* 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",
return 0;
}
- hwaddr->sa_family = ARPHRD_ETHER;
- memcpy (&hwaddr->sa_data, &ifr->ifr_hwaddr, ETH_ALEN);
+ /* Use the proper family for token ring support. */
+ if (ifreq.ifr_hwaddr.sa_family == 0)
+ hwaddr->sa_family = ARPHRD_ETHER;
+ else
+ hwaddr->sa_family = ifreq.ifr_hwaddr.sa_family;
+
+ /* Well, ethernet has the longest address so far . . . . */
+ memcpy (&hwaddr->sa_data, &ifreq.ifr_hwaddr.sa_data, ETH_ALEN);
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]));
+ (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]));
return 1;
}
+/*
+ * 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;
+ }
+}
+
/*
* 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;
+/*
+ * 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));
- ok = ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) >= 0;
+ strncpy (ifr.ifr_name, "ppp0", sizeof (ifr.ifr_name));
+ ok = ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) >= 0;
+/*
+ * Ensure that the hardware address is for PPP and not something else
+ */
+ if (ok != 0)
+ ok = ioctl (s, SIOCGIFHWADDR, (caddr_t) &ifr) >= 0;
+
+ if (ok != 0 && ifr.ifr_hwaddr.sa_family != 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;
+
+ 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 == 0) {
+ 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;
+
close(s);
-
+
+ if (ok == 0) {
+ fprintf(stderr, "Sorry - PPP driver version %d.%d.%d is out of date\n",
+ driver_version, driver_modification, driver_patch);
+ exit (1); /* avoid confusing error message 'ppp is not supported'. */
+ }
+
return ok;
}
+
+int logwtmp (char *line, char *name, char *host)
+{
+ struct utmp ut;
+
+ 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 */
+}
+
+/*
+ * Code for locking/unlocking the serial device.
+ * This code is derived from chat.c.
+ */
+
+#define LOCKPREFIX "/usr/spool/uucp/LCK.."
+
+/*
+ * lock - create a lock file for the named device
+ */
+int
+lock(dev)
+ char *dev;
+{
+ char hdb_lock_buffer[12];
+ int fd, pid, n;
+ char *p;
+
+ if ((p = strrchr(dev, '/')) != NULL)
+ dev = p + 1;
+ lock_file = malloc(strlen(LOCK_PREFIX) + strlen(dev) + 1);
+ if (lock_file == NULL)
+ novm("lock file name");
+ strcat(strcpy(lock_file, LOCK_PREFIX), dev);
+
+ 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;
+ pid = atoi(hdb_lock_buffer);
+ }
+ 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;
+ }
+
+ sprintf(hdb_lock_buffer, "%10d\n", getpid());
+ write(fd, hdb_lock_buffer, 11);
+
+ close(fd);
+ return 0;
+}
+
+/*
+ * unlock - remove our lockfile
+ */
+unlock()
+{
+ if (lock_file) {
+ unlink(lock_file);
+ free(lock_file);
+ lock_file = NULL;
+ }
+}
projects / ppp.git / blobdiff