-/*
- * sys-str.c - System-dependent procedures for setting up
- * PPP interfaces on 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-str.c,v 1.23 1995/08/11 02:36:23 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 <sys/types.h>
-#include <sys/socket.h>
-#include <sys/sockio.h>
-#include <sys/time.h>
-#include <sys/stream.h>
-#include <sys/stropts.h>
-
-#include <arpa/inet.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 <net/nit_if.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 */
-static char *lock_file; /* lock file created for serial port */
-
-/*
- * 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;
-}
-
-
-/*
- * ppp_available - check if this kernel supports PPP.
- */
-int
-ppp_available()
-{
- int fd, ret;
-
- fd = open("/dev/tty", O_RDONLY, 0);
- if (fd < 0)
- return 1; /* can't find out - assume we have ppp */
- ret = ioctl(fd, I_FIND, "pppasync") >= 0;
- close(fd);
- return ret;
-}
-
-
-/*
- * establish_ppp - Turn the serial port into a ppp interface.
- */
-void
-establish_ppp()
-{
- /* 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) < 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, SIOCGETU, &ifunit) < 0) {
- syslog(LOG_ERR, "ioctl(SIOCGETU): %m");
- die(1);
- }
-
- /* Set debug flags in driver */
- if (ioctl(fd, 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;
- }
-}
-
-/*
- * 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, 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 */
- ;
-
- 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, "Couldn't restore 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));
- }
- }
- pushed_ppp = 0;
- }
-}
-
-
-/*
- * 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.
- */
-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 (!default_device) {
- /*
- * 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.
- */
- inittermios.c_lflag &= ~(ECHO | ECHONL);
- }
- 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().
- */
-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.
- */
-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, SIOCSIFMTU, (caddr_t) &ifr) < 0) {
- syslog(LOG_ERR, "ioctl(SIOCSIFMTU): %m");
- quit();
- }
-
- if(ioctl(fd, SIOCSIFASYNCMAP, (caddr_t) &asyncmap) < 0) {
- if (hungup && errno == ENXIO)
- return;
- syslog(LOG_ERR, "ioctl(SIOCSIFASYNCMAP): %m");
- quit();
- }
-
- c = (pcomp? 1: 0);
- if(ioctl(fd, SIOCSIFCOMPPROT, &c) < 0) {
- syslog(LOG_ERR, "ioctl(SIOCSIFCOMPPROT): %m");
- quit();
- }
-
- c = (accomp? 1: 0);
- if(ioctl(fd, 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, 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, SIOCSIFMRU, &mru) < 0) {
- syslog(LOG_ERR, "ioctl(SIOCSIFMRU): %m");
- }
-
- if (ioctl(fd, SIOCSIFRASYNCMAP, (caddr_t) &asyncmap) < 0) {
- if (hungup && errno == ENXIO)
- return;
- syslog(LOG_ERR, "ioctl(SIOCSIFRASYNCMAP): %m");
- }
-
- c = 2 + (pcomp? 1: 0);
- if(ioctl(fd, SIOCSIFCOMPPROT, &c) < 0) {
- syslog(LOG_ERR, "ioctl(SIOCSIFCOMPPROT): %m");
- }
-
- c = 2 + (accomp? 1: 0);
- if (ioctl(fd, SIOCSIFCOMPAC, &c) < 0) {
- syslog(LOG_ERR, "ioctl(SIOCSIFCOMPAC): %m");
- }
-}
-
-/*
- * 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;
-
- 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, 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, SIOCSIFCOMP, (caddr_t) &x) < 0 && errno != ENOTTY) {
- if (hungup && errno == ENXIO)
- return;
- 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, 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, 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, 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, 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, SIOCSETNPMODE, (caddr_t) &npi) < 0) {
- if (errno != ENOTTY && errno != ENXIO) {
- syslog(LOG_ERR, "ioctl(SIOCSETNPMODE): %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 {
- if ((ifr.ifr_flags & IFF_UP) != 0) {
- ifr.ifr_flags &= ~IFF_UP;
- if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
- syslog(LOG_ERR, "Couldn't mark interface down: %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, 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, 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.
- */
-int
-cifaddr(u, o, h)
- int u;
- u_int32_t o, h;
-{
- struct rtentry 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, 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 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 = g;
- rt.rt_flags = RTF_GATEWAY;
- if (ioctl(sockfd, 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 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 = g;
- rt.rt_flags = RTF_GATEWAY;
- if (ioctl(sockfd, 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, 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_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
-get_ether_addr(ipaddr, hwaddr)
- u_int32_t ipaddr;
- struct sockaddr *hwaddr;
-{
- struct ifreq *ifr, *ifend;
- u_int32_t ina, mask;
- struct ifreq ifreq;
- struct ifconf ifc;
- struct ifreq ifs[MAX_IFS];
- int nit_fd;
-
- 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) {
-
- /*
- * 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_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;
- ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
- 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);
-
- /*
- * Grab the physical address for this interface.
- */
- if ((nit_fd = open("/dev/nit", O_RDONLY)) < 0) {
- syslog(LOG_ERR, "Couldn't open /dev/nit: %m");
- return 0;
- }
- strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
- if (ioctl(nit_fd, NIOCBIND, &ifreq) < 0
- || ioctl(nit_fd, SIOCGIFADDR, &ifreq) < 0) {
- syslog(LOG_ERR, "Couldn't get hardware address for %s: %m",
- ifreq.ifr_name);
- close(nit_fd);
- return 0;
- }
-
- hwaddr->sa_family = AF_UNSPEC;
- memcpy(hwaddr->sa_data, ifreq.ifr_addr.sa_data, 6);
- close(nit_fd);
- return 1;
-}
-
-#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);
-}
-
-/*
- * 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.
- */
-#define MAX_IFS 32
-
-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) {
- /*
- * 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;
-}
-
-/*
- * Code for locking/unlocking the serial device.
- * This code is derived from chat.c.
- */
-
-#if !defined(HDB) && !defined(SUNOS3)
-#define HDB 1 /* ascii lock files are the default */
-#endif
-
-#ifndef LOCK_DIR
-# if HDB
-# define PIDSTRING
-# define LOCK_PREFIX "/usr/spool/locks/LCK.."
-# else /* HDB */
-# define LOCK_PREFIX "/usr/spool/uucp/LCK.."
-# endif /* HDB */
-#endif /* LOCK_DIR */
-
-/*
- * 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;
- }
-}
-
-/*
- * SunOS doesn't have strtoul :-(
- */
-unsigned long
-strtoul(str, ptr, base)
- char *str, **ptr;
- int base;
-{
- return (unsigned long) strtol(str, ptr, base);
-}
projects / ppp.git / commitdiff