+/*
+ * sys-next.c - System-dependent procedures for setting up
+ * PPP interfaces on NeXT 3.2/3.3 systems
+ *
+ * Copyright (c) 1989 Carnegie Mellon University.
+ * Copyright (c) 1994 Philippe-Andre Prindeville.
+ * 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-NeXT.c,v 1.1 1995/08/10 06:48:34 paulus Exp $";
+#endif
+
+#include <stdio.h>
+#include <syslog.h>
+#include <termios.h>
+#include <utmp.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <strings.h>
+#include <sys/types.h>
+#include <sys/file.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <sys/time.h>
+#include <sys/errno.h>
+#include <sys/stat.h>
+#include <sys/fcntl.h>
+
+#include <net/if.h>
+#include <net/ppp_defs.h>
+#include <net/if_ppp.h>
+#include <netdb.h>
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/in_var.h>
+#include <netinet/ip.h>
+#include <netinet/if_ether.h>
+#include <net/route.h>
+#include <netinet/in.h>
+
+#include <netinfo/ni.h>
+
+#include "pppd.h"
+
+static int initdisc = -1; /* Initial TTY discipline */
+
+extern int errno;
+
+static int restore_term; /* 1 => we've munged the terminal */
+static struct termios inittermios; /* Initial TTY termios */
+
+static char *lock_file;
+
+int sockfd; /* socket for doing interface ioctls */
+
+#if defined(i386) && defined(HAS_BROKEN_IOCTL)
+#define ioctl myioctl
+#endif
+
+/*
+ * 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));
+ }
+}
+
+/*
+ * ppp_available - check whether the system has any ppp interfaces
+ * (in fact we check whether we can do an ioctl on ppp0).
+ */
+int
+ppp_available()
+{
+ int s, ok;
+ struct ifreq ifr;
+
+ if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
+ return 1; /* can't tell - maybe we're not root */
+
+ strncpy(ifr.ifr_name, "ppp0", sizeof (ifr.ifr_name));
+ ok = ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) >= 0;
+ close(s);
+
+ return ok;
+}
+
+/*
+ * establish_ppp - Turn the serial port into a ppp interface.
+ */
+void
+establish_ppp()
+{
+ int pppdisc = PPPDISC;
+ int x;
+
+ if (ioctl(fd, TIOCGETD, &initdisc) < 0) {
+ syslog(LOG_ERR, "ioctl(TIOCGETD): %m");
+ die(1);
+ }
+ if (ioctl(fd, TIOCSETD, &pppdisc) < 0) {
+ syslog(LOG_ERR, "ioctl(establish TIOCSETD): %m");
+ die(1);
+ }
+
+ /*
+ * Find out which interface we were given.
+ */
+ if (ioctl(fd, PPPIOCGUNIT, &ifunit) < 0) {
+ syslog(LOG_ERR, "ioctl(PPPIOCGUNIT): %m");
+ die(1);
+ }
+
+ /*
+ * Enable debug in the driver if requested.
+ */
+ if (kdebugflag) {
+ if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
+ syslog(LOG_WARNING, "ioctl(PPPIOCGFLAGS): %m");
+ } else {
+ x |= (kdebugflag & 0xFF) * SC_DEBUG;
+ if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
+ syslog(LOG_WARNING, "ioctl(PPPIOCSFLAGS): %m");
+ }
+ }
+}
+
+
+/*
+ * disestablish_ppp - Restore the serial port to normal operation.
+ * This shouldn't call die() because it's called from die().
+ */
+void
+disestablish_ppp()
+{
+ int x;
+ char *s;
+
+ if (initdisc >= 0) {
+ /*
+ * Check whether the link seems not to be 8-bit clean.
+ */
+ if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) == 0) {
+ s = NULL;
+ switch (~x & (SC_RCV_B7_0|SC_RCV_B7_1|SC_RCV_EVNP|SC_RCV_ODDP)) {
+ case SC_RCV_B7_0:
+ s = "bit 7 set to 1";
+ break;
+ case SC_RCV_B7_1:
+ s = "bit 7 set to 0";
+ break;
+ case SC_RCV_EVNP:
+ s = "odd parity";
+ break;
+ case SC_RCV_ODDP:
+ s = "even parity";
+ break;
+ }
+ if (s != NULL) {
+ syslog(LOG_WARNING, "Serial link is not 8-bit clean:");
+ syslog(LOG_WARNING, "All received characters had %s", s);
+ }
+ }
+ if (ioctl(fd, TIOCSETD, &initdisc) < 0)
+ syslog(LOG_ERR, "ioctl(disestablish TIOCSETD): %m");
+ }
+}
+
+/*
+ * 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 B14400
+ { 14400, B14400 },
+#endif
+#ifdef B28800
+ { 28800, B28800 },
+#endif
+#ifdef B43200
+ { 43200, B43200 },
+#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.
+ */
+set_up_tty(fd, local)
+ int fd, local;
+{
+ int speed, x, modembits;
+ 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;
+ 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);
+ }
+
+ if (modem) {
+ modembits = TIOCM_RTS | TIOCM_CTS;
+ if (ioctl(fd, (crtscts ? TIOCMBIS : TIOCMBIC), &modembits) < 0)
+ syslog(LOG_ERR, "ioctl: TIOCMBIS/BIC: %m");
+ }
+
+ 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");
+ restore_term = 0;
+ }
+}
+
+/*
+ * setdtr - control the DTR line on the serial port.
+ * This is called from die(), so it shouldn't call die().
+ *
+ * The write hack is to get NXFax to recognize that there is
+ * activity on the port. Not using the write nukes
+ * NXFax's capability to determine port usage.
+ *
+ */
+setdtr(fd, on)
+int fd, on;
+{
+ int modembits = TIOCM_DTR;
+
+ if (!on)
+ {
+ write(fd, " ", 1);
+ sleep(1);
+ }
+
+/* ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits); */
+ ioctl(fd, (on? TIOCSDTR: TIOCCDTR), 0);
+}
+
+
+/*
+ * output - Output PPP packet.
+ */
+void
+output(unit, p, len)
+ int unit;
+ u_char *p;
+ int len;
+{
+ if (unit != 0)
+ MAINDEBUG((LOG_WARNING, "output: unit != 0!"));
+ if (debug)
+ log_packet(p, len, "sent ");
+
+ if (write(fd, p, len) < 0) {
+ syslog(LOG_ERR, "write: %m");
+ die(1);
+ }
+}
+
+
+/*
+ * wait_input - wait until there is data available on fd,
+ * for the length of time specified by *timo (indefinite
+ * if timo is NULL).
+ */
+wait_input(timo)
+ 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(buf)
+ u_char *buf;
+{
+ int len;
+
+ if ((len = read(fd, buf, PPP_MTU + PPP_HDRLEN)) < 0) {
+ if (errno == EWOULDBLOCK || errno == EINTR) {
+ MAINDEBUG((LOG_DEBUG, "read(fd): %m"));
+ 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(unit, mtu, asyncmap, pcomp, accomp)
+ int unit, mtu;
+ u_int32_t asyncmap;
+ int pcomp, accomp;
+{
+ u_int x;
+ struct ifreq ifr;
+
+ strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
+ ifr.ifr_mtu = mtu;
+ if (ioctl(sockfd, SIOCSIFMTU, (caddr_t) &ifr) < 0) {
+ syslog(LOG_ERR, "ioctl(SIOCSIFMTU): %m");
+ quit();
+ }
+
+ 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 = pcomp? x | SC_COMP_PROT: x &~ SC_COMP_PROT;
+ x = accomp? x | SC_COMP_AC: x &~ SC_COMP_AC;
+ if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
+ syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %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, PPPIOCSXASYNCMAP, accm) < 0 && errno != ENOTTY)
+ syslog(LOG_WARNING, "ioctl(PPPIOCSXASYNCMAP): %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;
+{
+ int x;
+
+ if (ioctl(fd, PPPIOCSMRU, (caddr_t) &mru) < 0) {
+ syslog(LOG_ERR, "ioctl(PPPIOCSMRU): %m");
+ quit();
+ }
+ 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 = !accomp? x | SC_REJ_COMP_AC: x &~ SC_REJ_COMP_AC;
+ if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
+ syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
+ quit();
+ }
+}
+
+/*
+ * ccp_test - ask kernel whether a given compression method
+ * is acceptable for use.
+ */
+ccp_test(unit, opt_ptr, opt_len, for_transmit)
+ int unit, opt_len, for_transmit;
+ u_char *opt_ptr;
+{
+ 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(unit, isopen, isup)
+ int unit, isopen, 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");
+}
+
+/*
+ * 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, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
+ syslog(LOG_ERR, "ioctl(PPPIOCGFLAGS): %m");
+ return 0;
+ }
+ return x & SC_DC_FERROR;
+}
+
+/*
+ * sifvjcomp - config tcp header compression
+ */
+int
+sifvjcomp(u, vjcomp, cidcomp, maxcid)
+ int u, vjcomp, cidcomp, maxcid;
+{
+ u_int x;
+
+ if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
+ syslog(LOG_ERR, "ioctl(PPIOCGFLAGS): %m");
+ return 0;
+ }
+ x = vjcomp ? x | SC_COMP_TCP: x &~ SC_COMP_TCP;
+ x = cidcomp? x & ~SC_NO_TCP_CCID: x | SC_NO_TCP_CCID;
+ if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
+ syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
+ return 0;
+ }
+ if (ioctl(fd, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0) {
+ syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
+ return 0;
+ }
+ return 1;
+}
+
+/*
+ * sifup - Config the interface up and enable IP packets to pass.
+ */
+#ifndef SC_ENABLE_IP
+#define SC_ENABLE_IP 0x100 /* compat for old versions of kernel code */
+#endif
+
+int
+sifup(u)
+ int u;
+{
+ struct ifreq ifr;
+ u_int x;
+ struct npioctl npi;
+
+ strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
+ if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
+ syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m");
+ return 0;
+ }
+ ifr.ifr_flags |= IFF_UP;
+ if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
+ syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
+ return 0;
+ }
+ npi.protocol = PPP_IP;
+ npi.mode = NPMODE_PASS;
+ if (ioctl(fd, PPPIOCSNPMODE, &npi) < 0) {
+ if (errno != ENOTTY) {
+ syslog(LOG_ERR, "ioctl(PPPIOCSNPMODE): %m");
+ return 0;
+ }
+ /* for backwards compatibility */
+ if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
+ syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m");
+ return 0;
+ }
+ x |= SC_ENABLE_IP;
+ if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
+ syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
+ return 0;
+ }
+ }
+ return 1;
+}
+
+/*
+ * sifdown - Config the interface down and disable IP.
+ */
+int
+sifdown(u)
+ int u;
+{
+ struct ifreq ifr;
+ u_int x;
+ int rv;
+ struct npioctl npi;
+
+ rv = 1;
+ npi.protocol = PPP_IP;
+ npi.mode = NPMODE_ERROR;
+ if (ioctl(fd, PPPIOCSNPMODE, (caddr_t) &npi) < 0) {
+ if (errno != ENOTTY) {
+ syslog(LOG_ERR, "ioctl(PPPIOCSNPMODE): %m");
+ rv = 0;
+ } else {
+ /* backwards compatibility */
+ if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
+ syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m");
+ rv = 0;
+ } else {
+ x &= ~SC_ENABLE_IP;
+ if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
+ syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
+ rv = 0;
+ }
+ }
+ }
+ }
+
+ strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
+ if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
+ syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m");
+ rv = 0;
+ } else {
+ ifr.ifr_flags &= ~IFF_UP;
+ if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
+ syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
+ rv = 0;
+ }
+ }
+ return rv;
+}
+
+/*
+ * SET_SA_FAMILY - set the sa_family field of a struct sockaddr,
+ * if it exists.
+ */
+#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, SIOCSIFADDR, (caddr_t) &ifr) < 0) {
+ syslog(LOG_ERR, "ioctl(SIOCAIFADDR): %m");
+ ret = 0;
+ }
+ ((struct sockaddr_in *) &ifr.ifr_dstaddr)->sin_addr.s_addr = h;
+ if (ioctl(sockfd, 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, SIOCSIFNETMASK, (caddr_t) &ifr) < 0) {
+ syslog(LOG_ERR, "ioctl(SIOCSIFNETMASK): %m");
+ ret = 0;
+ }
+ }
+ return ret;
+}
+
+/*
+ * cifaddr - Clear the interface IP addresses, and delete routes
+ * through the interface if possible.
+ *
+ * N.B.: under NextStep, you can't *delete* an address on an interface,
+ * so we change it to 0.0.0.0... A real hack. But it simplifies
+ * reconnection on the server side.
+ */
+int
+cifaddr(u, o, h)
+ int u;
+ u_int32_t o, h;
+{
+ struct rtentry rt;
+
+#if 1
+ h = o = 0L;
+ (void) sifaddr(u, o, h, 0L);
+#endif
+ 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, 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;
+{
+ return dodefaultroute(g, 's');
+}
+
+/*
+ * cifdefaultroute - delete a default route through the address given.
+ */
+int
+cifdefaultroute(u, g)
+ int u;
+ u_int32_t g;
+{
+ return dodefaultroute(g, 'c');
+}
+
+/*
+ * dodefaultroute - talk to a routing socket to add/delete a default route.
+ */
+int
+dodefaultroute(g, cmd)
+ u_int32_t g;
+ int cmd;
+{
+ struct rtentry rt;
+
+ SET_SA_FAMILY(rt.rt_dst, AF_INET);
+ ((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr = 0L;
+ 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, (cmd == 's') ? SIOCADDRT : SIOCDELRT, &rt) < 0) {
+ syslog(LOG_ERR, "%cifdefaultroute: ioctl(%s): %m", cmd,
+ (cmd == 's') ? "SIOCADDRT" : "SIOCDELRT");
+ 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_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 = hisaddr;
+ arpreq.arp_flags = ATF_PERM | ATF_PUBL;
+ if (ioctl(sockfd, 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, SIOCDARP, (caddr_t)&arpreq) < 0) {
+ syslog(LOG_WARNING, "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
+get_ether_addr(ipaddr, hwaddr)
+ u_int32_t ipaddr;
+ struct sockaddr *hwaddr;
+{
+ struct ifreq *ifr, *ifend, *ifp;
+ u_int32_t ina, mask;
+ struct ether_addr dla;
+ struct ifreq ifreq;
+ struct ifconf ifc;
+ struct ifreq ifs[MAX_IFS];
+ struct hostent *hostent;
+
+ ifc.ifc_len = sizeof(ifs);
+ ifc.ifc_req = ifs;
+ if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
+ syslog(LOG_ERR, "ioctl(SIOCGIFCONF): %m");
+ 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; ifr = (struct ifreq *)
+ ((char *)&ifr->ifr_addr + sizeof(struct sockaddr))) {
+ 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, 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, SIOCGIFNETMASK, &ifreq) < 0)
+ continue;
+ mask = ((struct sockaddr_in*)&ifreq.ifr_addr)->sin_addr.s_addr;
+ if ((ipaddr & mask) != (ina & mask))
+ continue;
+
+ break;
+ }
+ }
+
+ if (ifr >= ifend)
+ return 0;
+ syslog(LOG_INFO, "found interface %s for proxy arp", ifr->ifr_name);
+
+ /*
+ * Get the hostname and look for an entry using the ethers database.
+ * Under NeXTStep this is the best we can do for now.
+ */
+ if ((hostent = gethostbyaddr((char*)&ina, sizeof(ina), AF_INET)) == NULL)
+ return 0;
+
+ if (ether_by_host(hostent->h_name, &dla)) {
+ syslog(LOG_INFO, "Add entry for %s in /etc/ethers", hostent->h_name);
+ return 0; /* it's not there */
+ }
+ hwaddr->sa_family = AF_UNSPEC;
+ BCOPY(&dla, hwaddr->sa_data, sizeof(dla));
+ return 1;
+}
+
+int
+ether_by_host(hostname, etherptr)
+ char *hostname;
+ struct ether_addr *etherptr;
+{
+ struct ether_addr *thisptr;
+ void *conn;
+ ni_id root;
+ ni_namelist val;
+ char path[256];
+
+ if (!ether_hostton(hostname, etherptr))
+ return 0;
+ /*
+ * We shall now try and
+ * find the address in the
+ * top domain of netinfo.
+ */
+ strcat(strcpy(path, "/machines/"), hostname);
+
+ if (ni_open((void *)0, "/", &conn)
+ || ni_root(conn, &root)
+ || ni_pathsearch(conn, &root, path)
+ || ni_lookupprop(conn, &root, "en_address", &val))
+ return 1;
+
+ /*
+ * Now we can convert the returned string into an ethernet address.
+ */
+ strcpy(path, val.ni_namelist_val[0]);
+ ni_free(conn);
+ if ((thisptr = (struct ether_addr*)ether_aton(path)) == NULL)
+ return 1;
+ BCOPY(thisptr, etherptr, sizeof(struct ether_addr));
+ return 0;
+}
+
+
+
+/*
+ * 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(addr)
+ 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 = (struct ifreq *)
+ ((char *)&ifr->ifr_addr + sizeof(struct sockaddr))) {
+ /*
+ * Check the interface's internet address.
+ */
+ if (ifr->ifr_addr.sa_family != AF_INET)
+ continue;
+ ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
+ if ((ntohl(ina) & nmask) != (addr & nmask))
+ continue;
+ /*
+ * Check that the interface is up, and not point-to-point or loopback.
+ */
+ strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
+ if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
+ continue;
+ if ((ifreq.ifr_flags & (IFF_UP|IFF_POINTOPOINT|IFF_LOOPBACK))
+ != IFF_UP)
+ 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;
+ }
+
+ return mask;
+}
+
+
+
+/*
+ * 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 */
+ (void)setsid();
+ if (!nochdir)
+ chdir("/");
+ if (!noclose) {
+ fclose(stdin); /* don't need stdin, stdout, stderr */
+ fclose(stdout);
+ fclose(stderr);
+ }
+ return 0;
+}
+
+
+char *
+strdup(s)
+ const char *s;
+{
+ char *d = malloc(strlen(s) + 1);
+
+ if (d) strcpy(d, s);
+ return d;
+}
+
+/*
+ * This logwtmp() implementation is subject to the following copyright:
+ *
+ * Copyright (c) 1988 The Regents of the University of California.
+ * 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 the University of California, Berkeley. 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.
+ */
+
+#define WTMPFILE "/usr/adm/wtmp"
+
+int
+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);
+}
+
+/*
+ * Routines for locking and unlocking the serial device, moved here
+ * from chat.c.
+ */
+
+#define LOCK_PREFIX "/usr/spool/uucp/LCK/LCK.."
+
+/*
+ * lock - create a lock file for the named device
+ */
+int
+lock(dev)
+ char *dev;
+{
+ 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, &pid, sizeof(pid));
+ 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;
+ }
+
+ pid = getpid();
+ write(fd, &pid, sizeof pid);
+
+ close(fd);
+ return 0;
+}
+
+/*
+ * unlock - remove our lockfile
+ */
+void
+unlock()
+{
+ if (lock_file) {
+ unlink(lock_file);
+ free(lock_file);
+ lock_file = NULL;
+ }
+}
+
+#if defined(i386) && defined(HAS_BROKEN_IOCTL)
+int
+ioctl(fd, cmd, c)
+ int fd, cmd;
+ caddr_t c;
+{
+#undef ioctl
+ int ret;
+
+#ifdef DEBUGIOCTL
+ int serrno;
+ u_char let, code, size;
+
+ size = (cmd >> 16) & IOCPARM_MASK;
+ let = (cmd >> 8);
+ code = cmd;
+
+ if (let == 't' && (75 <= code && code <= 90))
+ syslog(LOG_INFO, "ioctl(%d, 0x%x ('%c', %d, %d), 0x%x)\n", fd, cmd,
+ let, code, size, c);
+#endif
+
+ ret = ioctl(fd, cmd, c);
+
+#ifdef DEBUGIOCTL
+ serrno = errno;
+ if (ret == -1)
+ syslog(LOG_INFO, "ioctl('%c', %d, %d) errno = %d (%m)\n",
+ let, code, size, errno);
+ if (let == 't' && (75 <= code && code <= 90) && (cmd & IOC_OUT)) {
+ int i, len = ((cmd >> 16) & IOCPARM_MASK);
+ for (i = 0; i < len / 4; ++i)
+ syslog(LOG_INFO, "word[%d] @ 0x%06x = 0x%x\n",
+ i, &((int *) c)[i],((int *)c)[i]);
+ }
+ errno = serrno;
+#endif
+
+ if (ret == -1 && errno == EPERM)
+ errno = ret = 0;
+ return ret;
+}
+#endif /* HAS_BROKEN_IOCTL */
+
+
+#if defined(FIXSIGS) && (defined (hppa) || defined(sparc))
+
+/*
+ * These redefinitions of Posix functions are necessary
+ * because HPPA systems have an OS bug that causes
+ * sigaction to core dump:
+ *
+ * AlainF 9-Nov-1994 HACK FOR HP-PA/NEXTSTEP
+ * sigaction(3) seems broken in the HP-PA NeXTSTEP 3.2
+ * Posix lib. This causes pppd to SIGBUS at the expiration
+ * of the first timeout (_sigtramp seems to invoke
+ * the SIGALRM handler at an unreasonably low address).
+ * All calls so sigaction(3) have been changed to calls
+ * to sigvec(2) and sigprocmask(SIG_BLOCK,...) to
+ * sigblock(2).
+ * This is kind of a hack, especially since there are
+ * other routines of the Posix lib still used, but
+ * it worked for me.
+ *
+ * Dave Hess <David-Hess@net.tamu.edu> noted that 3.3 Sparc seems to
+ * have the same bug. Thus this fix has been enabled for SPARC also.
+ *
+ *
+ */
+
+int sigemptyset(sigset_t *mask)
+{
+ *mask = 0;
+}
+
+sigaddset(sigset_t *mask, int which_sig)
+{
+ *mask |= sigmask(which_sig);
+}
+
+
+int sigaction(int sig, const struct sigaction *act, struct sigaction *oact)
+{
+ struct sigvec sv;
+ static int in = 0;
+
+ sv.sv_handler = act->sa_handler;
+ sv.sv_mask = act->sa_mask;
+ sv.sv_flags = 0;
+
+ if (!in)
+ {
+ in = 1;
+ syslog(LOG_WARNING, "PPPD: Inside modified HP and SPARC sigaction\n");
+ }
+
+ return sigvec(sig, &sv, NULL);
+}
+
+#endif
projects / ppp.git / commitdiff