+ if (size < 0) {
+ error("Couldn't read driver version: %m");
+ ok = 0;
+ no_ppp_msg = "Sorry, couldn't verify kernel driver version\n";
+
+ } else {
+ decode_version(abBuffer,
+ &driver_version,
+ &driver_modification,
+ &driver_patch);
+/*
+ * Validate the version of the driver against the version that we used.
+ */
+ decode_version(VERSION,
+ &my_version,
+ &my_modification,
+ &my_patch);
+
+ /* The version numbers must match */
+ if (driver_version != my_version)
+ ok = 0;
+
+ /* The modification levels must be legal */
+ if (driver_modification < 3) {
+ if (driver_modification >= 2) {
+ /* we can cope with 2.2.0 and above */
+ driver_is_old = 1;
+ } else {
+ ok = 0;
+ }
+ }
+
+ close (s);
+ if (!ok) {
+ slprintf(route_buffer, sizeof(route_buffer),
+ "Sorry - PPP driver version %d.%d.%d is out of date\n",
+ driver_version, driver_modification, driver_patch);
+
+ no_ppp_msg = route_buffer;
+ }
+ }
+ }
+ return ok;
+}
+
+/********************************************************************
+ *
+ * Update the wtmp file with the appropriate user name and tty device.
+ */
+
+void logwtmp (const char *line, const char *name, const char *host)
+{
+ struct utmp ut, *utp;
+ pid_t mypid = getpid();
+#if __GLIBC__ < 2
+ int wtmp;
+#endif
+
+/*
+ * Update the signon database for users.
+ * Christoph Lameter: Copied from poeigl-1.36 Jan 3, 1996
+ */
+ utmpname(_PATH_UTMP);
+ setutent();
+ while ((utp = getutent()) && (utp->ut_pid != mypid))
+ /* nothing */;
+
+ if (utp)
+ memcpy(&ut, utp, sizeof(ut));
+ else
+ /* some gettys/telnetds don't initialize utmp... */
+ memset(&ut, 0, sizeof(ut));
+
+ if (ut.ut_id[0] == 0)
+ strncpy(ut.ut_id, line + 3, sizeof(ut.ut_id));
+
+ strncpy(ut.ut_user, name, sizeof(ut.ut_user));
+ strncpy(ut.ut_line, line, sizeof(ut.ut_line));
+
+ time(&ut.ut_time);
+
+ ut.ut_type = USER_PROCESS;
+ ut.ut_pid = mypid;
+
+ /* Insert the host name if one is supplied */
+ if (*host)
+ strncpy (ut.ut_host, host, sizeof(ut.ut_host));
+
+ /* Insert the IP address of the remote system if IP is enabled */
+ if (ipcp_protent.enabled_flag && ipcp_hisoptions[0].neg_addr)
+ memcpy(&ut.ut_addr, (char *) &ipcp_hisoptions[0].hisaddr,
+ sizeof(ut.ut_addr));
+
+ /* CL: Makes sure that the logout works */
+ if (*host == 0 && *name==0)
+ ut.ut_host[0]=0;
+
+ pututline(&ut);
+ endutent();
+/*
+ * Update the wtmp file.
+ */
+#if __GLIBC__ >= 2
+ updwtmp(_PATH_WTMP, &ut);
+#else
+ wtmp = open(_PATH_WTMP, O_APPEND|O_WRONLY);
+ if (wtmp >= 0) {
+ flock(wtmp, LOCK_EX);
+
+ if (write (wtmp, (char *)&ut, sizeof(ut)) != sizeof(ut))
+ warn("error writing %s: %m", _PATH_WTMP);
+
+ flock(wtmp, LOCK_UN);
+
+ close (wtmp);
+ }
+#endif
+}
+
+
+/********************************************************************
+ *
+ * sifvjcomp - config tcp header compression
+ */
+
+int sifvjcomp (int u, int vjcomp, int cidcomp, int maxcid)
+{
+ u_int x;
+
+ if (vjcomp) {
+ if (ioctl(ppp_dev_fd, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0)
+ error("Couldn't set up TCP header compression: %m");
+ vjcomp = 0;
+ }
+
+ x = (vjcomp? SC_COMP_TCP: 0) | (cidcomp? 0: SC_NO_TCP_CCID);
+ modify_flags(ppp_dev_fd, SC_COMP_TCP|SC_NO_TCP_CCID, x);
+
+ return 1;
+}
+
+/********************************************************************
+ *
+ * sifup - Config the interface up and enable IP packets to pass.
+ */
+
+int sifup(int u)
+{
+ struct ifreq ifr;
+
+ memset (&ifr, '\0', sizeof (ifr));
+ strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
+ if (ioctl(sock_fd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
+ if (! ok_error (errno))
+ error("ioctl (SIOCGIFFLAGS): %m (line %d)", __LINE__);
+ return 0;
+ }
+
+ ifr.ifr_flags |= (IFF_UP | IFF_POINTOPOINT);
+ if (ioctl(sock_fd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
+ if (! ok_error (errno))
+ error("ioctl(SIOCSIFFLAGS): %m (line %d)", __LINE__);
+ return 0;
+ }
+ if_is_up++;
+
+ return 1;
+}
+
+/********************************************************************
+ *
+ * sifdown - Disable the indicated protocol and config the interface
+ * down if there are no remaining protocols.
+ */
+
+int sifdown (int u)
+{
+ struct ifreq ifr;
+
+ if (if_is_up && --if_is_up > 0)
+ return 1;
+
+ memset (&ifr, '\0', sizeof (ifr));
+ strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
+ if (ioctl(sock_fd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
+ if (! ok_error (errno))
+ error("ioctl (SIOCGIFFLAGS): %m (line %d)", __LINE__);
+ return 0;
+ }
+
+ ifr.ifr_flags &= ~IFF_UP;
+ ifr.ifr_flags |= IFF_POINTOPOINT;
+ if (ioctl(sock_fd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
+ if (! ok_error (errno))
+ error("ioctl(SIOCSIFFLAGS): %m (line %d)", __LINE__);
+ return 0;
+ }
+ return 1;
+}
+
+/********************************************************************
+ *
+ * sifaddr - Config the interface IP addresses and netmask.
+ */
+
+int sifaddr (int unit, u_int32_t our_adr, u_int32_t his_adr,
+ u_int32_t net_mask)
+{
+ struct ifreq ifr;
+ struct rtentry rt;
+
+ memset (&ifr, '\0', sizeof (ifr));
+ memset (&rt, '\0', sizeof (rt));
+
+ SET_SA_FAMILY (ifr.ifr_addr, AF_INET);
+ SET_SA_FAMILY (ifr.ifr_dstaddr, AF_INET);
+ SET_SA_FAMILY (ifr.ifr_netmask, AF_INET);