+/*
+ * sys-osf.c - System-dependent procedures for setting up
+ * PPP interfaces on OSF/1 systems which use the STREAMS ppp interface.
+ *
+ * Copyright (c) 1989 Carnegie Mellon University.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by Carnegie Mellon University. The name of the
+ * University may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+#ifndef lint
+static char rcsid[] = "$Id: sys-osf.c,v 1.1 1995/04/24 06:16:23 paulus Exp $";
+#endif
+
+/*
+ * TODO:
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <syslog.h>
+#include <termios.h>
+#include <fcntl.h>
+#include <string.h>
+#include <time.h>
+#include <utmp.h>
+#include <poll.h>
+#include <signal.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/time.h>
+#include <sys/stream.h>
+#include <sys/stropts.h>
+
+#include <net/if.h>
+#include <net/ppp_defs.h>
+#include <net/ppp_str.h>
+#include <net/route.h>
+#include <net/if_arp.h>
+#include <netinet/in.h>
+
+#include "pppd.h"
+
+#ifndef ifr_mtu
+#define ifr_mtu ifr_metric
+#endif
+
+#define MAXMODULES 10 /* max number of module names to save */
+static struct modlist {
+ char modname[FMNAMESZ+1];
+} str_modules[MAXMODULES];
+static int str_module_count = 0;
+static int pushed_ppp;
+static int closed_stdio;
+
+static int restore_term; /* 1 => we've munged the terminal */
+static struct termios inittermios; /* Initial TTY termios */
+static struct winsize wsinfo; /* Initial window size info */
+
+int sockfd; /* socket for doing interface ioctls */
+
+int ttyfd = -1; /* Original ttyfd if we did a streamify() */
+
+/*
+ * sys_init - System-dependent initialization.
+ */
+void
+sys_init()
+{
+ 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);
+ }
+}
+
+/*
+ * note_debug_level - note a change in the debug level.
+ */
+void
+note_debug_level()
+{
+ if (debug) {
+ syslog(LOG_INFO, "Debug turned ON, Level %d", debug);
+ setlogmask(LOG_UPTO(LOG_DEBUG));
+ } else {
+ setlogmask(LOG_UPTO(LOG_WARNING));
+ }
+}
+
+/*
+ * daemon - Detach us from the terminal session.
+ */
+int
+daemon(nochdir, noclose)
+ int nochdir, noclose;
+{
+ int pid;
+
+ if ((pid = fork()) < 0)
+ return -1;
+ if (pid != 0)
+ exit(0); /* parent dies */
+ setsid();
+ if (!nochdir)
+ chdir("/");
+ if (!noclose) {
+ fclose(stdin); /* don't need stdin, stdout, stderr */
+ fclose(stdout);
+ fclose(stderr);
+ }
+ return 0;
+}
+
+
+char pipename[] = "/dev/streams/pipe";
+
+/*
+ * ppp_available - check if this kernel supports PPP.
+ */
+int
+ppp_available()
+{
+ int fd, ret;
+
+ fd = open(pipename, O_RDONLY, 0);
+ if (fd < 0)
+ return 0; /* can't find out - assume we don't have ppp */
+ ret = ioctl(fd, I_FIND, "pppasync") >= 0;
+ close(fd);
+ return ret;
+}
+
+
+/*
+ * streampipe -- Opens a STREAMS based pipe. Used by streamify().
+ */
+
+int
+streampipe(int fd[2])
+{
+ if ((fd[0]=open(pipename, O_RDWR)) == -1)
+ return(-1);
+ else if ((fd[1]=open(pipename, O_RDWR)) == -1) {
+ close(fd[0]);
+ return(-1);
+ } else if (ioctl(fd[0], I_PIPE, fd[1]) != 0) {
+ close(fd[0]);
+ close(fd[1]);
+ return(-1);
+ } else {
+ return(ioctl(fd[0], I_PUSH, "pipemod"));
+ }
+}
+
+/*
+ * streamify -- Needed for DEC OSF/1, since tty devices are not STREAMS
+ * modules (but ptys are, and pipes can be).
+ */
+
+#define BUFFSIZE 1000 /* Size of buffer for streamify() */
+
+int
+streamify(int fd)
+{
+ int fdes[2];
+ fd_set readfds;
+ int ret, fret, rret, maxfd;
+ static char buffer[BUFFSIZE];
+ struct sigaction sa;
+
+ if (streampipe(fdes) != 0)
+ syslog(LOG_ERR, "streampipe(): %m\n");
+ else if (isastream(fdes[0]) == 1) {
+ if ((fret=fork()) < 0) {
+ syslog(LOG_ERR, "fork(): %m\n");
+ } else if (fret == 0) {
+ /* Process to forward things from pipe to tty */
+ sigemptyset(&(sa.sa_mask));
+ sa.sa_handler = SIG_DFL;
+ sa.sa_flags = 0;
+ sigaction(SIGHUP, &sa, NULL); /* Go back to default actions */
+ sigaction(SIGINT, &sa, NULL); /* for changed signals. */
+ sigaction(SIGTERM, &sa, NULL);
+ sigaction(SIGCHLD, &sa, NULL);
+ sigaction(SIGUSR1, &sa, NULL);
+ sigaction(SIGUSR2, &sa, NULL);
+ close(fdes[0]);
+
+ maxfd = (fdes[1]>fd)?fdes[1]:fd;
+ while (1) {
+ FD_ZERO(&readfds);
+ FD_SET(fdes[1], &readfds);
+ FD_SET(fd, &readfds);
+ ret = select(maxfd+1, &readfds, NULL, NULL, NULL);
+ if (FD_ISSET(fd, &readfds)) {
+ rret = read(fd, buffer, BUFFSIZE);
+ if (rret == 0) {
+ MAINDEBUG((LOG_DEBUG, "slave died: EOF on tty."));
+ exit(0);
+ } else {
+ write(fdes[1], buffer, rret);
+ }
+ }
+ if (FD_ISSET(fdes[1], &readfds)) {
+ rret = read(fdes[1], buffer, BUFFSIZE);
+ if (rret == 0) {
+ MAINDEBUG((LOG_DEBUG, "slave died: EOF on pipe."));
+ exit(0);
+ } else {
+ write(fd, buffer, rret);
+ }
+ }
+ }
+ } else {
+ close(fdes[1]);
+ ttyfd = fd;
+ return(fdes[0]);
+ }
+ }
+
+ return(-1);
+}
+
+
+/*
+ * establish_ppp - Turn the serial port into a ppp interface.
+ */
+void
+establish_ppp()
+{
+ int ret;
+
+ if (isastream(fd) != 1) {
+ if ((fd=streamify(fd)) < 0) {
+ syslog(LOG_ERR, "Couldn't get a STREAMS module!\n");
+ die(1);
+ }
+ }
+
+ /* go through and save the name of all the modules, then pop em */
+ for (;;) {
+ if (ioctl(fd, I_LOOK, str_modules[str_module_count].modname) < 0 ||
+ ioctl(fd, I_POP, 0) < 0)
+ break;
+ MAINDEBUG((LOG_DEBUG, "popped stream module : %s",
+ str_modules[str_module_count].modname));
+ str_module_count++;
+ }
+
+ /* now push the async/fcs module */
+ if (ioctl(fd, I_PUSH, "pppasync") < 0) {
+ syslog(LOG_ERR, "ioctl(I_PUSH, ppp_async): %m");
+ die(1);
+ }
+ /* push the compress module */
+ if (ioctl(fd, I_PUSH, "pppcomp") < 0) {
+ syslog(LOG_WARNING, "ioctl(I_PUSH, ppp_comp): %m");
+ }
+ /* finally, push the ppp_if module that actually handles the */
+ /* network interface */
+ if (ioctl(fd, I_PUSH, "pppif") < 0) {
+ syslog(LOG_ERR, "ioctl(I_PUSH, ppp_if): %m");
+ die(1);
+ }
+ pushed_ppp = 1;
+ /* read mode, message non-discard mode */
+ if (ioctl(fd, I_SRDOPT, RMSGN|RPROTNORM) < 0) {
+ syslog(LOG_ERR, "ioctl(I_SRDOPT, RMSGN): %m");
+ die(1);
+ }
+ /*
+ * Find out which interface we were given.
+ * (ppp_if handles this ioctl)
+ */
+ if (ioctl(fd, (int)SIOCGETU, &ifunit) < 0) {
+ syslog(LOG_ERR, "ioctl(SIOCGETU): %m");
+ die(1);
+ }
+
+ /* Set debug flags in driver */
+ if (ioctl(fd, (int)SIOCSIFDEBUG, &kdebugflag) < 0) {
+ syslog(LOG_ERR, "ioctl(SIOCSIFDEBUG): %m");
+ }
+
+ /* close stdin, stdout, stderr if they might refer to the device */
+ if (default_device && !closed_stdio) {
+ int i;
+
+ for (i = 0; i <= 2; ++i)
+ if (i != fd && i != sockfd)
+ close(i);
+ closed_stdio = 1;
+ }
+}
+
+/* Debugging routine.... */
+
+void prstrstack(int fd)
+{
+ struct str_list sl;
+ struct str_mlist names[20];
+ int ret, i;
+
+ sl.sl_modlist = names;
+
+ ret = ioctl(fd, I_LIST, &sl);
+
+ if (ret >= 0) {
+ MAINDEBUG((LOG_DEBUG, "Current streams modules:\n"));
+ for (i=0; i<sl.sl_nmods; i++)
+ MAINDEBUG((LOG_DEBUG," %s\n", names[i].l_name));
+ } else {
+ MAINDEBUG((LOG_DEBUG,"I_LIST ioctl() failed.\n"));
+ }
+}
+
+
+/*
+ * disestablish_ppp - Restore the serial port to normal operation.
+ * It attempts to reconstruct the stream with the previously popped
+ * modules. This shouldn't call die() because it's called from die().
+ */
+void
+disestablish_ppp()
+{
+ int flags;
+ char *s;
+
+ if (hungup) {
+ /* we can't push or pop modules after the stream has hung up */
+ str_module_count = 0;
+ restore_term = 0; /* nor can we fix up terminal settings */
+ return;
+ }
+
+ if (pushed_ppp) {
+ /*
+ * Check whether the link seems not to be 8-bit clean.
+ */
+ if (ioctl(fd, (int)SIOCGIFDEBUG, (caddr_t) &flags) == 0) {
+ s = NULL;
+ switch (~flags & PAI_FLAGS_HIBITS) {
+ case PAI_FLAGS_B7_0:
+ s = "bit 7 set to 1";
+ break;
+ case PAI_FLAGS_B7_1:
+ s = "bit 7 set to 0";
+ break;
+ case PAI_FLAGS_PAR_EVEN:
+ s = "odd parity";
+ break;
+ case PAI_FLAGS_PAR_ODD:
+ 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);
+ }
+ }
+
+ while (ioctl(fd, I_POP, 0) == 0) /* pop any we pushed */
+ ;
+ pushed_ppp = 0;
+
+ for (; str_module_count > 0; str_module_count--) {
+ if (ioctl(fd, I_PUSH, str_modules[str_module_count-1].modname)) {
+ if (errno != ENXIO)
+ syslog(LOG_WARNING, "str_restore: couldn't push module %s: %m",
+ str_modules[str_module_count-1].modname);
+ } else {
+ MAINDEBUG((LOG_INFO, "str_restore: pushed module %s",
+ str_modules[str_module_count-1].modname));
+ }
+ }
+
+ if (ttyfd >= 0) {
+ close(fd);
+ fd = ttyfd;
+ ttyfd = -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(bps)
+ 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);
+ return 0;
+}
+
+/*
+ * Translate from a speed_t to bits/second.
+ */
+int
+baud_rate_of(speed)
+ 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(fd, local)
+ int fd, local;
+{
+ int speed;
+ struct termios tios;
+
+ if (tcgetattr(fd, &tios) < 0) {
+ syslog(LOG_ERR, "tcgetattr: %m");
+ die(1);
+ }
+
+ if (!restore_term) {
+ inittermios = tios;
+ ioctl(fd, TIOCGWINSZ, &wsinfo);
+ }
+
+ tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL);
+ if (crtscts > 0)
+ 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_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 = inspeed = baud_rate_of(speed);
+ restore_term = 1;
+}
+
+/*
+ * restore_tty - restore the terminal to the saved settings.
+ */
+void
+restore_tty()
+{
+ if (restore_term) {
+ if (tcsetattr(fd, TCSAFLUSH, &inittermios) < 0)
+ if (errno != ENXIO)
+ syslog(LOG_WARNING, "tcsetattr: %m");
+ ioctl(fd, TIOCSWINSZ, &wsinfo);
+ restore_term = 0;
+ }
+}
+
+/*
+ * setdtr - control the DTR line on the serial port.
+ * This is called from die(), so it shouldn't call die().
+ */
+void
+setdtr(fd, on)
+int fd, on;
+{
+ int modembits = TIOCM_DTR;
+
+ ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits);
+}
+
+
+/*
+ * output - Output PPP packet.
+ */
+void
+output(unit, p, len)
+ int unit;
+ u_char *p;
+ int len;
+{
+ struct strbuf str;
+
+ if (unit != 0)
+ MAINDEBUG((LOG_WARNING, "output: unit != 0!"));
+ if (debug)
+ log_packet(p, len, "sent ");
+
+ str.len = len;
+ str.buf = (caddr_t) p;
+ if (putmsg(fd, NULL, &str, 0) < 0) {
+ if (errno != ENXIO) {
+ syslog(LOG_ERR, "putmsg: %m");
+ die(1);
+ }
+ }
+}
+
+/*
+ * wait_input - wait for input, for a length of time specified in *timo.
+ */
+void
+wait_input(timo)
+ struct timeval *timo;
+{
+ int t;
+ struct pollfd pfd;
+
+ t = timo == NULL? -1: timo->tv_sec * 1000 + timo->tv_usec / 1000;
+ pfd.fd = fd;
+ pfd.events = POLLIN | POLLPRI | POLLHUP;
+ if (poll(&pfd, 1, t) < 0 && errno != EINTR) {
+ syslog(LOG_ERR, "poll: %m");
+ die(1);
+ }
+}
+
+/*
+ * read_packet - get a PPP packet from the serial device.
+ */
+int
+read_packet(buf)
+ u_char *buf;
+{
+ struct strbuf str, ctl;
+ int len, i;
+ unsigned char ctlbuf[16];
+
+ str.maxlen = PPP_MTU + PPP_HDRLEN;
+ str.buf = (caddr_t) buf;
+ ctl.maxlen = sizeof(ctlbuf);
+ ctl.buf = (caddr_t) ctlbuf;
+ i = 0;
+ len = getmsg(fd, &ctl, &str, &i);
+ if (len < 0) {
+ if (errno == EAGAIN || errno == EWOULDBLOCK || errno == EINTR) {
+ return -1;
+ }
+ syslog(LOG_ERR, "getmsg(fd) %m");
+ die(1);
+ }
+ if (len)
+ MAINDEBUG((LOG_DEBUG, "getmsg returned 0x%x",len));
+ if (ctl.len > 0)
+ syslog(LOG_NOTICE, "got ctrl msg len %d %x %x\n", ctl.len,
+ ctlbuf[0], ctlbuf[1]);
+
+ if (str.len < 0) {
+ MAINDEBUG((LOG_DEBUG, "getmsg short return length %d", str.len));
+ return -1;
+ }
+
+ return str.len;
+}
+
+
+/*
+ * ppp_send_config - configure the transmit characteristics of
+ * the ppp interface.
+ */
+void
+ppp_send_config(unit, mtu, asyncmap, pcomp, accomp)
+ int unit, mtu;
+ u_int32_t asyncmap;
+ int pcomp, accomp;
+{
+ char c;
+ struct ifreq ifr;
+
+ strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
+ ifr.ifr_mtu = mtu;
+ if (ioctl(sockfd, (int)SIOCSIPMTU, (caddr_t) &ifr) < 0) {
+ syslog(LOG_ERR, "ioctl(SIOCSIPMTU): %m");
+ quit();
+ }
+
+ if(ioctl(fd, (int)SIOCSIFASYNCMAP, (caddr_t) &asyncmap) < 0) {
+ syslog(LOG_ERR, "ioctl(SIOCSIFASYNCMAP): %m");
+ quit();
+ }
+
+ c = (pcomp? 1: 0);
+ if(ioctl(fd, (int)SIOCSIFCOMPPROT, &c) < 0) {
+ syslog(LOG_ERR, "ioctl(SIOCSIFCOMPPROT): %m");
+ quit();
+ }
+
+ c = (accomp? 1: 0);
+ if(ioctl(fd, (int)SIOCSIFCOMPAC, &c) < 0) {
+ syslog(LOG_ERR, "ioctl(SIOCSIFCOMPAC): %m");
+ quit();
+ }
+}
+
+
+/*
+ * ppp_set_xaccm - set the extended transmit ACCM for the interface.
+ */
+void
+ppp_set_xaccm(unit, accm)
+ int unit;
+ ext_accm accm;
+{
+ if (ioctl(fd, (int)SIOCSIFXASYNCMAP, 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(unit, mru, asyncmap, pcomp, accomp)
+ int unit, mru;
+ u_int32_t asyncmap;
+ int pcomp, accomp;
+{
+ char c;
+
+ if (ioctl(fd, (int)SIOCSIFMRU, &mru) < 0) {
+ syslog(LOG_ERR, "ioctl(SIOCSIFMRU): %m");
+ }
+
+ if (ioctl(fd, (int)SIOCSIFRASYNCMAP, (caddr_t) &asyncmap) < 0) {
+ syslog(LOG_ERR, "ioctl(SIOCSIFRASYNCMAP): %m");
+ }
+
+ c = 2 + (pcomp? 1: 0);
+ if(ioctl(fd, (int)SIOCSIFCOMPPROT, &c) < 0) {
+ syslog(LOG_ERR, "ioctl(SIOCSIFCOMPPROT): %m");
+ }
+
+ c = 2 + (accomp? 1: 0);
+ if (ioctl(fd, (int)SIOCSIFCOMPAC, &c) < 0) {
+ syslog(LOG_ERR, "ioctl(SIOCSIFCOMPAC): %m");
+ }
+}
+
+/*
+ * ccp_test - ask kernel whether a given compression method
+ * is acceptable for use.
+ */
+int
+ccp_test(unit, opt_ptr, opt_len, for_transmit)
+ int unit, opt_len, for_transmit;
+ u_char *opt_ptr;
+{
+ struct ppp_option_data data;
+
+ if ((unsigned) opt_len > MAX_PPP_OPTION)
+ opt_len = MAX_PPP_OPTION;
+ data.length = opt_len;
+ data.transmit = for_transmit;
+ BCOPY(opt_ptr, data.opt_data, opt_len);
+ return ioctl(fd, (int)SIOCSCOMPRESS, (caddr_t) &data) >= 0;
+}
+
+/*
+ * ccp_flags_set - inform kernel about the current state of CCP.
+ */
+void
+ccp_flags_set(unit, isopen, isup)
+ int unit, isopen, isup;
+{
+ int x;
+
+ x = (isopen? 1: 0) + (isup? 2: 0);
+ if (ioctl(fd, (int)SIOCSIFCOMP, (caddr_t) &x) < 0 && errno != ENOTTY)
+ syslog(LOG_ERR, "ioctl (SIOCSIFCOMP): %m");
+}
+
+/*
+ * 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(unit)
+ int unit;
+{
+ int x;
+
+ if (ioctl(fd, (int)SIOCGIFCOMP, (caddr_t) &x) < 0) {
+ syslog(LOG_ERR, "ioctl(SIOCGIFCOMP): %m");
+ return 0;
+ }
+ return x & CCP_FATALERROR;
+}
+
+/*
+ * sifvjcomp - config tcp header compression
+ */
+int
+sifvjcomp(u, vjcomp, cidcomp, maxcid)
+ int u, vjcomp, cidcomp, maxcid;
+{
+ char x;
+
+ x = (vjcomp? 1: 0) + (cidcomp? 0: 2) + (maxcid << 4);
+ if (ioctl(fd, (int)SIOCSIFVJCOMP, (caddr_t) &x) < 0) {
+ syslog(LOG_ERR, "ioctl(SIOCSIFVJCOMP): %m");
+ return 0;
+ }
+ return 1;
+}
+
+/*
+ * sifup - Config the interface up and enable IP packets to pass.
+ */
+int
+sifup(u)
+ int u;
+{
+ struct ifreq ifr;
+ struct npioctl npi;
+
+ strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
+ if (ioctl(sockfd, (int)SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
+ syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m");
+ return 0;
+ }
+ ifr.ifr_flags |= IFF_UP;
+ if (ioctl(sockfd, (int)SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
+ syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
+ return 0;
+ }
+ npi.protocol = PPP_IP;
+ npi.mode = NPMODE_PASS;
+ if (ioctl(fd, (int)SIOCSETNPMODE, &npi) < 0) {
+ if (errno != ENOTTY) {
+ syslog(LOG_ERR, "ioctl(SIOCSETNPMODE): %m");
+ return 0;
+ }
+ }
+ return 1;
+}
+
+/*
+ * sifdown - Config the interface down.
+ */
+int
+sifdown(u)
+ int u;
+{
+ struct ifreq ifr;
+ int rv;
+ struct npioctl npi;
+
+ rv = 1;
+ npi.protocol = PPP_IP;
+ npi.mode = NPMODE_ERROR;
+ if (ioctl(fd, (int)SIOCSETNPMODE, (caddr_t) &npi) < 0) {
+ if (errno != ENOTTY) {
+ syslog(LOG_ERR, "ioctl(SIOCSETNPMODE): %m");
+ rv = 0;
+ }
+ }
+
+ strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
+ if (ioctl(sockfd, (int)SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
+ syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m");
+ rv = 0;
+ } else {
+ ifr.ifr_flags &= ~IFF_UP;
+ if (ioctl(sockfd, (int)SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
+ syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
+ rv = 0;
+ }
+ }
+ return rv;
+}
+
+/*
+ * SET_SA_FAMILY - initialize a struct sockaddr, setting the sa_family field.
+ */
+#define SET_SA_FAMILY(addr, family) \
+ BZERO((char *) &(addr), sizeof(addr)); \
+ addr.sa_family = (family);
+
+/*
+ * sifaddr - Config the interface IP addresses and netmask.
+ */
+int
+sifaddr(u, o, h, m)
+ int u;
+ u_int32_t o, h, m;
+{
+ int ret;
+ struct ifreq ifr;
+
+ ret = 1;
+ strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
+ SET_SA_FAMILY(ifr.ifr_addr, AF_INET);
+ ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = o;
+ if (ioctl(sockfd, (int)SIOCSIFADDR, (caddr_t) &ifr) < 0) {
+ syslog(LOG_ERR, "ioctl(SIOCSIFADDR): %m");
+ ret = 0;
+ }
+ ((struct sockaddr_in *) &ifr.ifr_dstaddr)->sin_addr.s_addr = h;
+ if (ioctl(sockfd, (int)SIOCSIFDSTADDR, (caddr_t) &ifr) < 0) {
+ syslog(LOG_ERR, "ioctl(SIOCSIFDSTADDR): %m");
+ ret = 0;
+ }
+ if (m != 0) {
+ ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = m;
+ syslog(LOG_INFO, "Setting interface mask to %s\n", ip_ntoa(m));
+ if (ioctl(sockfd, (int)SIOCSIFNETMASK, (caddr_t) &ifr) < 0) {
+ syslog(LOG_ERR, "ioctl(SIOCSIFNETMASK): %m");
+ ret = 0;
+ }
+ }
+
+/* Reset if address --- This is stupid, but seems to be necessary... */
+
+ ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = o;
+ if (ioctl(sockfd, (int)SIOCSIFADDR, (caddr_t) &ifr) < 0) {
+ syslog(LOG_ERR, "ioctl(SIOCSIFADDR): %m");
+ ret = 0;
+ }
+
+ return ret;
+}
+
+/*
+ * cifaddr - Clear the interface IP addresses, and delete routes
+ * through the interface if possible.
+ */
+int
+cifaddr(u, o, h)
+ int u;
+ u_int32_t o, h;
+{
+ struct ortentry rt;
+
+ SET_SA_FAMILY(rt.rt_dst, AF_INET);
+ ((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr = h;
+ SET_SA_FAMILY(rt.rt_gateway, AF_INET);
+ ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = o;
+ rt.rt_flags = RTF_HOST;
+ if (ioctl(sockfd, (int)SIOCDELRT, (caddr_t) &rt) < 0) {
+ syslog(LOG_ERR, "ioctl(SIOCDELRT): %m");
+ return 0;
+ }
+ return 1;
+}
+
+/*
+ * sifdefaultroute - assign a default route through the address given.
+ */
+int
+sifdefaultroute(u, g)
+ int u;
+ u_int32_t g;
+{
+ struct ortentry 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 = g;
+ rt.rt_flags = RTF_GATEWAY;
+ if (ioctl(sockfd, (int)SIOCADDRT, &rt) < 0) {
+ syslog(LOG_ERR, "default route ioctl(SIOCADDRT): %m");
+ return 0;
+ }
+ return 1;
+}
+
+/*
+ * cifdefaultroute - delete a default route through the address given.
+ */
+int
+cifdefaultroute(u, g)
+ int u;
+ u_int32_t g;
+{
+ struct ortentry 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 = g;
+ rt.rt_flags = RTF_GATEWAY;
+ if (ioctl(sockfd, (int)SIOCDELRT, &rt) < 0) {
+ syslog(LOG_ERR, "default route ioctl(SIOCDELRT): %m");
+ return 0;
+ }
+ return 1;
+}
+
+/*
+ * sifproxyarp - Make a proxy ARP entry for the peer.
+ */
+int
+sifproxyarp(unit, hisaddr)
+ int unit;
+ u_int32_t hisaddr;
+{
+ struct arpreq arpreq;
+
+ BZERO(&arpreq, sizeof(arpreq));
+
+ /*
+ * Get the hardware address of an interface on the same subnet
+ * as our local address.
+ */
+ if (!get_ether_addr(hisaddr, &arpreq.arp_ha)) {
+ syslog(LOG_WARNING, "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 = hisaddr;
+ arpreq.arp_flags = ATF_PERM | ATF_PUBL;
+ if (ioctl(sockfd, (int)SIOCSARP, (caddr_t)&arpreq) < 0) {
+ syslog(LOG_ERR, "ioctl(SIOCSARP): %m");
+ return 0;
+ }
+
+ return 1;
+}
+
+/*
+ * cifproxyarp - Delete the proxy ARP entry for the peer.
+ */
+int
+cifproxyarp(unit, hisaddr)
+ int unit;
+ u_int32_t hisaddr;
+{
+ struct arpreq arpreq;
+
+ BZERO(&arpreq, sizeof(arpreq));
+ SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
+ ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
+ if (ioctl(sockfd, (int)SIOCDARP, (caddr_t)&arpreq) < 0) {
+ syslog(LOG_ERR, "ioctl(SIOCDARP): %m");
+ return 0;
+ }
+ return 1;
+}
+
+/*
+ * get_ether_addr - get the hardware address of an interface on the
+ * the same subnet as ipaddr.
+ */
+#define MAX_IFS 32
+
+int s;
+
+int
+get_ether_addr(ipaddr, hwaddr)
+ u_int ipaddr;
+ struct sockaddr *hwaddr;
+{
+ struct ifreq *ifr, *ifend, *ifp;
+ u_int ina, mask;
+ struct sockaddr_dl *dla;
+ struct ifreq ifreq;
+ struct ifconf ifc;
+ struct ifreq ifs[MAX_IFS];
+ struct ifdevea ifdevreq;
+
+ ifc.ifc_len = sizeof(ifs);
+ ifc.ifc_req = ifs;
+ if (ioctl(sockfd, (int)SIOCGIFCONF, &ifc) < 0) {
+ perror("ioctl(SIOCGIFCONF)");
+ return 0;
+ }
+
+ /*
+ * Scan through looking for an interface with an Internet
+ * address on the same subnet as `ipaddr'.
+ */
+ ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
+ for (ifr = ifc.ifc_req; ifr < ifend; ) {
+ 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));
+ /*
+ * Check that the interface is up, and not point-to-point
+ * or loopback.
+ */
+ if (ioctl(sockfd, (int)SIOCGIFFLAGS, &ifreq) < 0)
+ continue;
+ if ((ifreq.ifr_flags &
+ (IFF_UP|IFF_BROADCAST|IFF_POINTOPOINT|IFF_LOOPBACK|IFF_NOARP))
+ != (IFF_UP|IFF_BROADCAST))
+ continue;
+ /*
+ * Get its netmask and check that it's on the right subnet.
+ */
+ if (ioctl(sockfd, (int)SIOCGIFNETMASK, &ifreq) < 0)
+ continue;
+ mask = ((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr.s_addr;
+ if ((ipaddr & mask) != (ina & mask))
+ continue;
+
+ break;
+ }
+ ifr++;
+ }
+
+ if (ifr >= ifend)
+ return 0;
+ syslog(LOG_INFO, "found interface %s for proxy arp", ifr->ifr_name);
+
+ strncpy(ifdevreq.ifr_name, ifr->ifr_name, sizeof(ifdevreq.ifr_name));
+
+ if (ioctl(sockfd, (int)SIOCRPHYSADDR, &ifdevreq) < 0) {
+ perror("ioctl(SIOCRPHYSADDR)");
+ return(0);
+ }
+
+ hwaddr->sa_family = AF_UNSPEC;
+ memcpy(hwaddr->sa_data, ifdevreq.current_pa, sizeof(ifdevreq.current_pa));
+ return(1);
+}
+
+
+
+
+#define WTMPFILE "/usr/adm/wtmp"
+#include <sys/stat.h>
+
+void
+logwtmp(line, name, host)
+ char *line, *name, *host;
+{
+ int fd;
+ struct stat buf;
+ struct utmp ut;
+
+ if ((fd = open(WTMPFILE, O_WRONLY|O_APPEND, 0)) < 0)
+ return;
+ if (!fstat(fd, &buf)) {
+ (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);
+ if (write(fd, (char *)&ut, sizeof(struct utmp)) != sizeof(struct utmp))
+ (void)ftruncate(fd, buf.st_size);
+ }
+ close(fd);
+}
+
+/*
+ * Code for locking/unlocking the serial device.
+ * This code is derived from chat.c.
+ */
+
+#ifndef LOCK_DIR
+# ifdef HDB
+# define PIDSTRING
+# define LOCK_PREFIX "/usr/spool/locks/LCK.."
+# else /* HDB */
+# define LOCK_PREFIX "/usr/spool/uucp/LCK.."
+# endif /* HDB */
+#endif /* LOCK_DIR */
+
+static char *lock_file;
+
+/*
+ * 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 */
+#ifdef PIDSTRING
+ n = read(fd, hdb_lock_buffer, 11);
+ if (n > 0) {
+ hdb_lock_buffer[n] = 0;
+ pid = atoi(hdb_lock_buffer);
+ }
+#else
+ n = read(fd, &pid, sizeof(pid));
+#endif
+ 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;
+ }
+
+# ifdef PIDSTRING
+ sprintf(hdb_lock_buffer, "%10d\n", getpid());
+ write(fd, hdb_lock_buffer, 11);
+# else
+ pid = getpid();
+ write(fd, &pid, sizeof pid);
+# endif
+
+ close(fd);
+ return 0;
+}
+
+/*
+ * unlock - remove our lockfile
+ */
+void
+unlock()
+{
+ if (lock_file) {
+ unlink(lock_file);
+ free(lock_file);
+ lock_file = NULL;
+ }
+}
+
projects / ppp.git / commitdiff