2 * System-dependent procedures for pppd under Digital UNIX (OSF/1).
4 * Copyright (c) 1994 The Australian National University.
7 * Permission to use, copy, modify, and distribute this software and its
8 * documentation is hereby granted, provided that the above copyright
9 * notice appears in all copies. This software is provided without any
10 * warranty, express or implied. The Australian National University
11 * makes no representations about the suitability of this software for
14 * IN NO EVENT SHALL THE AUSTRALIAN NATIONAL UNIVERSITY BE LIABLE TO ANY
15 * PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
16 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
17 * THE AUSTRALIAN NATIONAL UNIVERSITY HAVE BEEN ADVISED OF THE POSSIBILITY
20 * THE AUSTRALIAN NATIONAL UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES,
21 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
22 * AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
23 * ON AN "AS IS" BASIS, AND THE AUSTRALIAN NATIONAL UNIVERSITY HAS NO
24 * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS,
29 static char rcsid[] = "$Id: sys-osf.c,v 1.14 1998/11/07 06:59:31 paulus Exp $";
44 #include <sys/types.h>
45 #include <sys/param.h>
46 #include <sys/socket.h>
47 #include <sys/stream.h>
48 #include <sys/stropts.h>
49 #include <sys/syslog.h>
54 #include <net/if_arp.h>
55 #include <net/route.h>
56 #include <net/ppp_defs.h>
57 #include <net/pppio.h>
58 #include <netinet/in.h>
63 static int fdmuxid = -1;
67 static int restore_term;
68 static struct termios inittermios;
69 static struct winsize wsinfo; /* Initial window size info */
70 static pid_t tty_sid; /* PID of our session leader */
72 extern u_char inpacket_buf[]; /* borrowed from main.c */
74 static int link_mtu, link_mru;
77 static int tty_nmodules;
78 static char tty_modules[NMODULES][FMNAMESZ+1];
80 static int closed_stdio;
81 static int initfdflags = -1;
82 static int orig_ttyfd = -1;
84 static int if_is_up; /* Interface has been marked up */
85 static u_int32_t ifaddrs[2]; /* local and remote addresses */
86 static u_int32_t default_route_gateway; /* Gateway for default route added */
87 static u_int32_t proxy_arp_addr; /* Addr for proxy arp entry added */
89 /* Prototypes for procedures local to this file. */
90 static int translate_speed __P((int));
91 static int baud_rate_of __P((int));
92 static int get_ether_addr __P((u_int32_t, struct sockaddr *));
93 static int strioctl __P((int, int, void *, int, int));
97 * sys_init - System-dependent initialization.
104 openlog("pppd", LOG_PID | LOG_NDELAY, LOG_PPP);
105 setlogmask(LOG_UPTO(LOG_INFO));
107 setlogmask(LOG_UPTO(LOG_DEBUG));
109 /* Get an internet socket for doing socket ioctl's on. */
110 if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
111 syslog(LOG_ERR, "Couldn't create IP socket: %m");
116 tty_sid = getsid((pid_t)0);
119 * Open the ppp device.
121 pppfd = open("/dev/streams/ppp", O_RDWR | O_NONBLOCK, 0);
123 syslog(LOG_ERR, "Can't open /dev/streams/ppp: %m");
127 x = PPPDBG_LOG + PPPDBG_DRIVER;
128 strioctl(pppfd, PPPIO_DEBUG, &x, sizeof(int), 0);
131 /* Assign a new PPA and get its unit number. */
132 if (strioctl(pppfd, PPPIO_NEWPPA, &ifunit, 0, sizeof(int)) < 0) {
133 syslog(LOG_ERR, "Can't create new PPP interface: %m");
138 * Open the ppp device again and push the if_ppp module on it.
140 iffd = open("/dev/streams/ppp", O_RDWR, 0);
142 syslog(LOG_ERR, "Can't open /dev/streams/ppp (2): %m");
146 x = PPPDBG_LOG + PPPDBG_DRIVER;
147 strioctl(iffd, PPPIO_DEBUG, &x, sizeof(int), 0);
149 if (strioctl(iffd, PPPIO_ATTACH, &ifunit, sizeof(int), 0) < 0) {
150 syslog(LOG_ERR, "Couldn't attach ppp interface to device: %m");
153 if (ioctl(iffd, I_PUSH, "if_ppp") < 0) {
154 syslog(LOG_ERR, "Can't push ppp interface module: %m");
158 x = PPPDBG_LOG + PPPDBG_IF;
159 strioctl(iffd, PPPIO_DEBUG, &x, sizeof(int), 0);
161 if (strioctl(iffd, PPPIO_NEWPPA, &ifunit, sizeof(int), 0) < 0) {
162 syslog(LOG_ERR, "Couldn't create ppp interface unit: %m");
166 if (strioctl(iffd, PPPIO_BIND, &x, sizeof(int), 0) < 0) {
167 syslog(LOG_ERR, "Couldn't bind ppp interface to IP SAP: %m");
173 * sys_cleanup - restore any system state we modified before exiting:
174 * mark the interface down, delete default route and/or proxy arp entry.
175 * This shouldn't call die() because it's called from die().
183 cifaddr(0, ifaddrs[0], ifaddrs[1]);
184 if (default_route_gateway)
185 cifdefaultroute(0, 0, default_route_gateway);
187 cifproxyarp(0, proxy_arp_addr);
191 * sys_close - Clean up in a child process before execing.
203 * sys_check_options - check the options that the user specified
213 * daemon - Detach us from controlling terminal session.
216 daemon(nochdir, noclose)
217 int nochdir, noclose;
221 if ((pid = fork()) < 0)
224 exit(0); /* parent dies */
229 fclose(stdin); /* don't need stdin, stdout, stderr */
237 * note_debug_level - note a change in the debug level.
243 setlogmask(LOG_UPTO(LOG_DEBUG));
245 setlogmask(LOG_UPTO(LOG_WARNING));
250 * ppp_available - check whether the system has any ppp interfaces
257 return stat("/dev/streams/ppp", &buf) >= 0;
260 char pipename[] = "/dev/streams/pipe";
263 * streampipe -- Opens a STREAMS based pipe. Used by streamify().
267 streampipe(int fd[2])
269 if ((fd[0]=open(pipename, O_RDWR)) == -1)
271 else if ((fd[1]=open(pipename, O_RDWR)) == -1) {
274 } else if (ioctl(fd[0], I_PIPE, fd[1]) != 0) {
279 return(ioctl(fd[0], I_PUSH, "pipemod"));
284 * streamify -- Needed for Digital UNIX, since some tty devices are not STREAMS
285 * modules (but ptys are, and pipes can be).
288 #define BUFFSIZE 1000 /* Size of buffer for streamify() */
295 int ret, fret, rret, maxfd;
296 static char buffer[BUFFSIZE];
299 if (streampipe(fdes) != 0)
300 syslog(LOG_ERR, "streampipe(): %m\n");
301 else if (isastream(fdes[0]) == 1) {
302 if ((fret=fork()) < 0) {
303 syslog(LOG_ERR, "fork(): %m\n");
304 } else if (fret == 0) {
305 /* Process to forward things from pipe to tty */
306 sigemptyset(&(sa.sa_mask));
307 sa.sa_handler = SIG_DFL;
309 sigaction(SIGHUP, &sa, NULL); /* Go back to default actions */
310 sigaction(SIGINT, &sa, NULL); /* for changed signals. */
311 sigaction(SIGTERM, &sa, NULL);
312 sigaction(SIGCHLD, &sa, NULL);
313 sigaction(SIGUSR1, &sa, NULL);
314 sigaction(SIGUSR2, &sa, NULL);
317 maxfd = (fdes[1]>fd)?fdes[1]:fd;
320 FD_SET(fdes[1], &readfds);
321 FD_SET(fd, &readfds);
322 ret = select(maxfd+1, &readfds, NULL, NULL, NULL);
323 if (FD_ISSET(fd, &readfds)) {
324 rret = read(fd, buffer, BUFFSIZE);
326 MAINDEBUG((LOG_DEBUG, "slave died: EOF on tty."));
329 write(fdes[1], buffer, rret);
332 if (FD_ISSET(fdes[1], &readfds)) {
333 rret = read(fdes[1], buffer, BUFFSIZE);
335 MAINDEBUG((LOG_DEBUG, "slave died: EOF on pipe."));
338 write(fd, buffer, rret);
353 * establish_ppp - Turn the serial port into a ppp interface.
361 if (isastream(fd) != 1) {
362 if ((ttyfd = fd = streamify(fd)) < 0) {
363 syslog(LOG_ERR, "Couldn't get a STREAMS module!\n");
368 /* Pop any existing modules off the tty stream. */
370 if (ioctl(fd, I_LOOK, tty_modules[i]) < 0
371 || ioctl(fd, I_POP, 0) < 0)
373 syslog(LOG_ERR, "popping module %s\n", tty_modules[i]);
378 /* Push the async hdlc module and the compressor module. */
379 if (ioctl(fd, I_PUSH, "ppp_ahdl") < 0) {
380 syslog(LOG_ERR, "Couldn't push PPP Async HDLC module: %m");
383 if (ioctl(fd, I_PUSH, "ppp_comp") < 0) {
384 syslog(LOG_ERR, "Couldn't push PPP compression module: %m");
388 /* read mode, message non-discard mode */
389 if (ioctl(fd, I_SRDOPT, RMSGN|RPROTNORM) < 0) {
390 syslog(LOG_ERR, "ioctl(I_SRDOPT, RMSGN): %m");
394 /* Link the serial port under the PPP multiplexor. */
395 if ((fdmuxid = ioctl(pppfd, I_LINK, fd)) < 0) {
396 syslog(LOG_ERR, "Can't link tty to PPP mux: %m");
400 /* close stdin, stdout, stderr if they might refer to the device */
401 if (default_device && !closed_stdio) {
404 for (i = 0; i <= 2; ++i)
405 if (i != fd && i != sockfd)
411 * Set device for non-blocking reads.
413 if ((initfdflags = fcntl(fd, F_GETFL)) == -1
414 || fcntl(fd, F_SETFL, initfdflags | O_NONBLOCK) == -1) {
415 syslog(LOG_WARNING, "Couldn't set device to non-blocking mode: %m");
420 * restore_loop - reattach the ppp unit to the loopback.
421 * This doesn't need to do anything because disestablish_ppp does it.
429 * disestablish_ppp - Restore the serial port to normal operation.
430 * It attempts to reconstruct the stream with the previously popped
431 * modules. This shouldn't call die() because it's called from die().
440 if (ioctl(pppfd, I_UNLINK, fdmuxid) < 0) {
442 syslog(LOG_ERR, "Can't unlink tty from PPP mux: %m");
446 /* Reset non-blocking mode on the file descriptor. */
447 if (initfdflags != -1 && fcntl(fd, F_SETFL, initfdflags) < 0)
448 syslog(LOG_WARNING, "Couldn't restore device fd flags: %m");
452 while (ioctl(fd, I_POP, 0) >= 0)
454 for (i = tty_nmodules - 1; i >= 0; --i)
455 if (ioctl(fd, I_PUSH, tty_modules[i]) < 0)
456 syslog(LOG_ERR, "Couldn't restore tty module %s: %m",
460 if (hungup && default_device && tty_sid > 0) {
462 * If we have received a hangup, we need to send a SIGHUP
463 * to the terminal's controlling process. The reason is
464 * that the original stream head for the terminal hasn't
465 * seen the M_HANGUP message (it went up through the ppp
466 * driver to the stream head for our fd to /dev/ppp).
468 syslog(LOG_DEBUG, "sending hangup to %d", tty_sid);
469 if (kill(tty_sid, SIGHUP) < 0)
470 syslog(LOG_ERR, "couldn't kill pgrp: %m");
472 if (orig_ttyfd >= 0) {
474 (void)wait((void *)0);
482 * Check whether the link seems not to be 8-bit clean.
490 if (strioctl(pppfd, PPPIO_GCLEAN, &x, 0, sizeof(x)) < 0)
495 s = "bit 7 set to 1";
498 s = "bit 7 set to 0";
508 syslog(LOG_WARNING, "Serial link is not 8-bit clean:");
509 syslog(LOG_WARNING, "All received characters had %s", s);
514 * List of valid speeds.
517 int speed_int, speed_val;
589 * Translate from bits/second to a speed_t.
595 struct speed *speedp;
599 for (speedp = speeds; speedp->speed_int; speedp++)
600 if (bps == speedp->speed_int)
601 return speedp->speed_val;
602 syslog(LOG_WARNING, "speed %d not supported", bps);
607 * Translate from a speed_t to bits/second.
613 struct speed *speedp;
617 for (speedp = speeds; speedp->speed_int; speedp++)
618 if (speed == speedp->speed_val)
619 return speedp->speed_int;
624 * set_up_tty: Set up the serial port on `fd' for 8 bits, no parity,
625 * at the requested speed, etc. If `local' is true, set CLOCAL
626 * regardless of whether the modem option was specified.
629 set_up_tty(fd, local)
635 if (tcgetattr(fd, &tios) < 0) {
636 syslog(LOG_ERR, "tcgetattr: %m");
642 ioctl(fd, TIOCGWINSZ, &wsinfo);
645 tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL);
647 tios.c_cflag |= CRTSCTS;
648 else if (crtscts < 0)
649 tios.c_cflag &= ~CRTSCTS;
651 tios.c_cflag |= CS8 | CREAD | HUPCL;
653 tios.c_cflag |= CLOCAL;
654 tios.c_iflag = IGNBRK | IGNPAR;
658 tios.c_cc[VTIME] = 0;
661 tios.c_iflag |= IXON | IXOFF;
662 tios.c_cc[VSTOP] = 0x13; /* DC3 = XOFF = ^S */
663 tios.c_cc[VSTART] = 0x11; /* DC1 = XON = ^Q */
666 speed = translate_speed(inspeed);
668 cfsetospeed(&tios, speed);
669 cfsetispeed(&tios, speed);
671 speed = cfgetospeed(&tios);
673 * We can't proceed if the serial port speed is 0,
674 * since that implies that the serial port is disabled.
677 syslog(LOG_ERR, "Baud rate for %s is 0; need explicit baud rate",
683 if (tcsetattr(fd, TCSAFLUSH, &tios) < 0) {
684 syslog(LOG_ERR, "tcsetattr: %m");
688 baud_rate = inspeed = baud_rate_of(speed);
693 * restore_tty - restore the terminal to the saved settings.
700 if (!default_device) {
702 * Turn off echoing, because otherwise we can get into
703 * a loop with the tty and the modem echoing to each other.
704 * We presume we are the sole user of this tty device, so
705 * when we close it, it will revert to its defaults anyway.
707 inittermios.c_lflag &= ~(ECHO | ECHONL);
709 if (tcsetattr(fd, TCSAFLUSH, &inittermios) < 0)
710 if (!hungup && errno != ENXIO)
711 syslog(LOG_WARNING, "tcsetattr: %m");
712 ioctl(fd, TIOCSWINSZ, &wsinfo);
718 * setdtr - control the DTR line on the serial port.
719 * This is called from die(), so it shouldn't call die().
725 int modembits = TIOCM_DTR;
727 ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits);
731 * open_loopback - open the device we use for getting packets
732 * in demand mode. Under Solaris 2, we use our existing fd
741 * output - Output PPP packet.
754 log_packet(p, len, "sent ", LOG_DEBUG);
757 data.buf = (caddr_t) p;
759 while (putmsg(pppfd, NULL, &data, 0) < 0) {
760 if (--retries < 0 || (errno != EWOULDBLOCK && errno != EAGAIN)) {
762 syslog(LOG_ERR, "Couldn't send packet: %m");
766 pfd.events = POLLOUT;
767 poll(&pfd, 1, 250); /* wait for up to 0.25 seconds */
773 * wait_input - wait until there is data available on fd,
774 * for the length of time specified by *timo (indefinite
779 struct timeval *timo;
784 t = timo == NULL? -1: timo->tv_sec * 1000 + timo->tv_usec / 1000;
786 pfd.events = POLLIN | POLLPRI | POLLHUP;
787 if (poll(&pfd, 1, t) < 0 && errno != EINTR) {
788 syslog(LOG_ERR, "poll: %m");
794 * wait_loop_output - wait until there is data available on the
795 * loopback, for the length of time specified by *timo (indefinite
799 wait_loop_output(timo)
800 struct timeval *timo;
806 * wait_time - wait for a given length of time or until a
807 * signal is received.
811 struct timeval *timo;
815 n = select(0, NULL, NULL, NULL, timo);
816 if (n < 0 && errno != EINTR) {
817 syslog(LOG_ERR, "select: %m");
824 * read_packet - get a PPP packet from the serial device.
830 struct strbuf ctrl, data;
832 unsigned char ctrlbuf[64];
835 data.maxlen = PPP_MRU + PPP_HDRLEN;
836 data.buf = (caddr_t) buf;
837 ctrl.maxlen = sizeof(ctrlbuf);
838 ctrl.buf = (caddr_t) ctrlbuf;
840 len = getmsg(pppfd, &ctrl, &data, &flags);
842 if (errno = EAGAIN || errno == EWOULDBLOCK || errno == EINTR)
844 syslog(LOG_ERR, "Error reading packet: %m");
852 * Got a M_PROTO or M_PCPROTO message. Huh?
855 syslog(LOG_DEBUG, "got ctrl msg len=%d", ctrl.len);
861 * get_loop_output - get outgoing packets from the ppp device,
862 * and detect when we want to bring the real link up.
863 * Return value is 1 if we need to bring up the link, 0 otherwise.
871 while ((len = read_packet(inpacket_buf)) > 0) {
872 if (loop_frame(inpacket_buf, len))
879 * ppp_send_config - configure the transmit characteristics of
883 ppp_send_config(unit, mtu, asyncmap, pcomp, accomp)
891 if (strioctl(pppfd, PPPIO_MTU, &mtu, sizeof(mtu), 0) < 0) {
892 if (hungup && errno == ENXIO)
894 syslog(LOG_ERR, "Couldn't set MTU: %m");
896 if (strioctl(pppfd, PPPIO_XACCM, &asyncmap, sizeof(asyncmap), 0) < 0) {
897 syslog(LOG_ERR, "Couldn't set transmit ACCM: %m");
899 cf[0] = (pcomp? COMP_PROT: 0) + (accomp? COMP_AC: 0);
900 cf[1] = COMP_PROT | COMP_AC;
901 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
902 syslog(LOG_ERR, "Couldn't set prot/AC compression: %m");
907 * ppp_set_xaccm - set the extended transmit ACCM for the interface.
910 ppp_set_xaccm(unit, accm)
914 if (strioctl(pppfd, PPPIO_XACCM, accm, sizeof(ext_accm), 0) < 0) {
915 if (!hungup || errno != ENXIO)
916 syslog(LOG_WARNING, "Couldn't set extended ACCM: %m");
921 * ppp_recv_config - configure the receive-side characteristics of
925 ppp_recv_config(unit, mru, asyncmap, pcomp, accomp)
933 if (strioctl(pppfd, PPPIO_MRU, &mru, sizeof(mru), 0) < 0) {
934 if (hungup && errno == ENXIO)
936 syslog(LOG_ERR, "Couldn't set MRU: %m");
938 if (strioctl(pppfd, PPPIO_RACCM, &asyncmap, sizeof(asyncmap), 0) < 0) {
939 syslog(LOG_ERR, "Couldn't set receive ACCM: %m");
941 cf[0] = (pcomp? DECOMP_PROT: 0) + (accomp? DECOMP_AC: 0);
942 cf[1] = DECOMP_PROT | DECOMP_AC;
943 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
944 syslog(LOG_ERR, "Couldn't set prot/AC decompression: %m");
949 * ccp_test - ask kernel whether a given compression method
950 * is acceptable for use.
952 * In Digital UNIX the memory buckets for chunks >16K are not
953 * primed when the system comes up. That means we're not
954 * likely to get the memory needed for the compressor on
955 * the first try. The way we work around this is to have
956 * the driver spin off a thread to go get the memory for us
957 * (we can't block at that point in a streams context.)
959 * This code synchronizes with the thread when it has returned
960 * with the memory we need. The driver will continue to return
961 * with EAGAIN until the thread comes back. We give up here
962 * if after 10 attempts in one second we still don't have memory.
963 * It's up to the driver to not lose track of that memory if
964 * thread takes too long to return.
967 ccp_test(unit, opt_ptr, opt_len, for_transmit)
968 int unit, opt_len, for_transmit;
975 tval.tv_usec = 100000;
976 for (i = 0; i < 10; ++i) {
977 if (strioctl(pppfd, (for_transmit? PPPIO_XCOMP: PPPIO_RCOMP),
978 opt_ptr, opt_len, 0) >= 0) {
986 syslog(LOG_ERR, "hard failure trying to get memory for a compressor: %m");
987 return (errno == ENOSR)? 0: -1;
991 * ccp_flags_set - inform kernel about the current state of CCP.
994 ccp_flags_set(unit, isopen, isup)
995 int unit, isopen, isup;
999 cf[0] = (isopen? CCP_ISOPEN: 0) + (isup? CCP_ISUP: 0);
1000 cf[1] = CCP_ISOPEN | CCP_ISUP | CCP_ERROR | CCP_FATALERROR;
1001 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
1002 if (!hungup || errno != ENXIO)
1003 syslog(LOG_ERR, "Couldn't set kernel CCP state: %m");
1008 * get_idle_time - return how long the link has been idle.
1011 get_idle_time(u, ip)
1013 struct ppp_idle *ip;
1015 return strioctl(pppfd, PPPIO_GIDLE, ip, 0, sizeof(struct ppp_idle)) >= 0;
1020 * ccp_fatal_error - returns 1 if decompression was disabled as a
1021 * result of an error detected after decompression of a packet,
1022 * 0 otherwise. This is necessary because of patent nonsense.
1025 ccp_fatal_error(unit)
1031 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
1032 if (errno != ENXIO && errno != EINVAL)
1033 syslog(LOG_ERR, "Couldn't get compression flags: %m");
1036 return cf[0] & CCP_FATALERROR;
1040 * sifvjcomp - config tcp header compression
1043 sifvjcomp(u, vjcomp, xcidcomp, xmaxcid)
1044 int u, vjcomp, xcidcomp, xmaxcid;
1050 maxcid[0] = xcidcomp;
1051 maxcid[1] = 15; /* XXX should be rmaxcid */
1052 if (strioctl(pppfd, PPPIO_VJINIT, maxcid, sizeof(maxcid), 0) < 0) {
1053 syslog(LOG_ERR, "Couldn't initialize VJ compression: %m");
1057 cf[0] = (vjcomp? COMP_VJC + DECOMP_VJC: 0) /* XXX this is wrong */
1058 + (xcidcomp? COMP_VJCCID + DECOMP_VJCCID: 0);
1059 cf[1] = COMP_VJC + DECOMP_VJC + COMP_VJCCID + DECOMP_VJCCID;
1060 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
1062 syslog(LOG_ERR, "Couldn't enable VJ compression: %m");
1069 * sifup - Config the interface up and enable IP packets to pass.
1077 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
1078 if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) < 0) {
1079 syslog(LOG_ERR, "Couldn't mark interface up (get): %m");
1082 ifr.ifr_flags |= IFF_UP;
1083 if (ioctl(sockfd, SIOCSIFFLAGS, &ifr) < 0) {
1084 syslog(LOG_ERR, "Couldn't mark interface up (set): %m");
1092 * sifdown - Config the interface down and disable IP.
1100 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
1101 if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) < 0) {
1102 syslog(LOG_ERR, "Couldn't mark interface down (get): %m");
1105 if ((ifr.ifr_flags & IFF_UP) != 0) {
1106 ifr.ifr_flags &= ~IFF_UP;
1107 if (ioctl(sockfd, SIOCSIFFLAGS, &ifr) < 0) {
1108 syslog(LOG_ERR, "Couldn't mark interface down (set): %m");
1117 * sifnpmode - Set the mode for handling packets for a given NP.
1120 sifnpmode(u, proto, mode)
1128 npi[1] = (int) mode;
1129 if (strioctl(pppfd, PPPIO_NPMODE, npi, 2 * sizeof(int), 0) < 0) {
1130 syslog(LOG_ERR, "ioctl(set NP %d mode to %d): %m", proto, mode);
1136 #define INET_ADDR(x) (((struct sockaddr_in *) &(x))->sin_addr.s_addr)
1139 * SET_SA_FAMILY - initialize a struct sockaddr, setting the sa_family field.
1141 #define SET_SA_FAMILY(addr, family) \
1142 BZERO((char *) &(addr), sizeof(addr)); \
1143 addr.sa_family = (family); \
1144 addr.sa_len = sizeof ((addr))
1147 * sifaddr - Config the interface IP addresses and netmask.
1155 struct ifaliasreq addreq;
1160 /* flush old address, if any
1162 bzero(&ifr, sizeof (ifr));
1163 strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
1164 SET_SA_FAMILY(ifr.ifr_addr, AF_INET);
1165 ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = o;
1166 if ((ioctl(sockfd, (int)SIOCDIFADDR, (caddr_t) &ifr) < 0)
1167 && errno != EADDRNOTAVAIL) {
1168 syslog(LOG_ERR, "ioctl(SIOCDIFADDR): %m");
1172 bzero(&addreq, sizeof (addreq));
1173 strncpy(addreq.ifra_name, ifname, sizeof (addreq.ifra_name));
1174 SET_SA_FAMILY(addreq.ifra_addr, AF_INET);
1175 SET_SA_FAMILY(addreq.ifra_broadaddr, AF_INET);
1176 ((struct sockaddr_in *)&addreq.ifra_addr)->sin_addr.s_addr = o;
1177 ((struct sockaddr_in *)&addreq.ifra_broadaddr)->sin_addr.s_addr = h;
1180 ((struct sockaddr_in *)&addreq.ifra_mask)->sin_addr.s_addr = m;
1181 addreq.ifra_mask.sa_len = sizeof (struct sockaddr);
1182 syslog(LOG_INFO, "Setting interface mask to %s\n", ip_ntoa(m));
1185 /* install new src/dst and (possibly) netmask
1187 if (ioctl(sockfd, SIOCPIFADDR, &addreq) < 0) {
1188 syslog(LOG_ERR, "ioctl(SIOCPIFADDR): %m");
1192 ifr.ifr_metric = link_mtu;
1193 if (ioctl(sockfd, SIOCSIPMTU, &ifr) < 0) {
1194 syslog(LOG_ERR, "Couldn't set IP MTU: %m");
1205 * cifaddr - Clear the interface IP addresses, and delete routes
1206 * through the interface if possible.
1216 bzero(&ifr, sizeof (ifr));
1217 strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
1218 SET_SA_FAMILY(ifr.ifr_addr, AF_INET);
1219 ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = o;
1220 if (ioctl(sockfd, (int)SIOCDIFADDR, (caddr_t) &ifr) < 0) {
1221 syslog(LOG_ERR, "ioctl(SIOCDIFADDR): %m");
1229 * sifdefaultroute - assign a default route through the address given.
1232 sifdefaultroute(u, l, g)
1238 BZERO(&rt, sizeof(rt));
1239 SET_SA_FAMILY(rt.rt_dst, AF_INET);
1240 SET_SA_FAMILY(rt.rt_gateway, AF_INET);
1241 ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = g;
1242 rt.rt_flags = RTF_GATEWAY;
1243 if (ioctl(sockfd, (int)SIOCADDRT, &rt) < 0) {
1244 syslog(LOG_ERR, "default route ioctl(SIOCADDRT): %m");
1247 default_route_gateway = g;
1253 * cifdefaultroute - delete a default route through the address given.
1256 cifdefaultroute(u, l, g)
1262 BZERO(&rt, sizeof(rt));
1263 SET_SA_FAMILY(rt.rt_dst, AF_INET);
1264 SET_SA_FAMILY(rt.rt_gateway, AF_INET);
1265 ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = g;
1266 rt.rt_flags = RTF_GATEWAY;
1267 if (ioctl(sockfd, (int)SIOCDELRT, &rt) < 0) {
1268 syslog(LOG_ERR, "default route ioctl(SIOCDELRT): %m");
1271 default_route_gateway = 0;
1276 * sifproxyarp - Make a proxy ARP entry for the peer.
1279 sifproxyarp(unit, hisaddr)
1283 struct arpreq arpreq;
1285 BZERO(&arpreq, sizeof(arpreq));
1288 * Get the hardware address of an interface on the same subnet
1289 * as our local address.
1291 if (!get_ether_addr(hisaddr, &arpreq.arp_ha)) {
1292 syslog(LOG_WARNING, "Cannot determine ethernet address for proxy ARP");
1296 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
1297 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
1298 arpreq.arp_flags = ATF_PERM | ATF_PUBL;
1299 if (ioctl(sockfd, (int)SIOCSARP, (caddr_t)&arpreq) < 0) {
1300 syslog(LOG_ERR, "ioctl(SIOCSARP): %m");
1304 proxy_arp_addr = hisaddr;
1310 * cifproxyarp - Delete the proxy ARP entry for the peer.
1313 cifproxyarp(unit, hisaddr)
1317 struct arpreq arpreq;
1319 BZERO(&arpreq, sizeof(arpreq));
1320 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
1321 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
1322 if (ioctl(sockfd, (int)SIOCDARP, (caddr_t)&arpreq) < 0) {
1323 syslog(LOG_ERR, "ioctl(SIOCDARP): %m");
1331 * get_ether_addr - get the hardware address of an interface on the
1332 * the same subnet as ipaddr.
1337 get_ether_addr(ipaddr, hwaddr)
1339 struct sockaddr *hwaddr;
1341 struct ifreq *ifr, *ifend;
1342 u_int32_t ina, mask;
1345 struct ifreq ifs[MAX_IFS];
1346 struct ifdevea ifdevreq;
1348 ifc.ifc_len = sizeof(ifs);
1350 if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1351 syslog(LOG_ERR, "ioctl(SIOCGIFCONF): %m");
1356 * Scan through looking for an interface with an Internet
1357 * address on the same subnet as `ipaddr'.
1359 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1360 for (ifr = ifc.ifc_req; ifr < ifend; ifr++) {
1361 if (ifr->ifr_addr.sa_family == AF_INET) {
1364 * Check that the interface is up, and not point-to-point
1367 strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1368 if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1370 if ((ifreq.ifr_flags &
1371 (IFF_UP|IFF_BROADCAST|IFF_POINTOPOINT|IFF_LOOPBACK|IFF_NOARP))
1372 != (IFF_UP|IFF_BROADCAST))
1376 * Get its netmask and check that it's on the right subnet.
1378 if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1380 ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
1381 mask = ((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr.s_addr;
1382 if ((ipaddr & mask) != (ina & mask))
1387 if (ifr->ifr_addr.sa_len > sizeof (ifr->ifr_addr))
1388 ifr = (struct ifreq *)((caddr_t)ifr + (ifr->ifr_addr.sa_len - sizeof (ifr->ifr_addr)));
1394 syslog(LOG_INFO, "found interface %s for proxy arp", ifr->ifr_name);
1396 strncpy(ifdevreq.ifr_name, ifr->ifr_name, sizeof(ifdevreq.ifr_name));
1398 if (ioctl(sockfd, (int)SIOCRPHYSADDR, &ifdevreq) < 0) {
1399 perror("ioctl(SIOCRPHYSADDR)");
1403 hwaddr->sa_family = AF_UNSPEC;
1404 memcpy(hwaddr->sa_data, ifdevreq.current_pa, sizeof(ifdevreq.current_pa));
1408 #define WTMPFILE "/usr/adm/wtmp"
1411 logwtmp(line, name, host)
1412 const char *line, *name, *host;
1418 if ((fd = open(WTMPFILE, O_WRONLY|O_APPEND, 0)) < 0)
1420 if (!fstat(fd, &buf)) {
1421 (void)strncpy(ut.ut_line, line, sizeof(ut.ut_line));
1422 (void)strncpy(ut.ut_name, name, sizeof(ut.ut_name));
1423 (void)strncpy(ut.ut_host, host, sizeof(ut.ut_host));
1424 (void)time(&ut.ut_time);
1425 if (write(fd, (char *)&ut, sizeof(struct utmp)) != sizeof(struct utmp))
1426 (void)ftruncate(fd, buf.st_size);
1432 * Return user specified netmask, modified by any mask we might determine
1433 * for address `addr' (in network byte order).
1434 * Here we scan through the system's list of interfaces, looking for
1435 * any non-point-to-point interfaces which might appear to be on the same
1436 * network as `addr'. If we find any, we OR in their netmask to the
1437 * user-specified netmask.
1443 u_int32_t mask, nmask, ina;
1444 struct ifreq *ifr, *ifend, ifreq;
1448 if (IN_CLASSA(addr)) /* determine network mask for address class */
1449 nmask = IN_CLASSA_NET;
1450 else if (IN_CLASSB(addr))
1451 nmask = IN_CLASSB_NET;
1453 nmask = IN_CLASSC_NET;
1454 /* class D nets are disallowed by bad_ip_adrs */
1455 mask = netmask | htonl(nmask);
1458 * Scan through the system's network interfaces.
1460 ifc.ifc_len = MAX_IFS * sizeof(struct ifreq);
1461 ifc.ifc_req = (struct ifreq *)alloca(ifc.ifc_len);
1462 if (ifc.ifc_req == 0)
1464 if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1465 syslog(LOG_WARNING, "Couldn't get system interface list: %m");
1468 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1469 for (ifr = ifc.ifc_req; ifr < ifend; ifr++) {
1471 * Check the interface's internet address.
1473 if (ifr->ifr_addr.sa_family == AF_INET) {
1474 ina = INET_ADDR(ifr->ifr_addr);
1475 if ((ntohl(ina) & nmask) != (addr & nmask))
1478 * Check that the interface is up, and not point-to-point or loopback.
1480 strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1481 if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1483 if ((ifreq.ifr_flags & (IFF_UP|IFF_POINTOPOINT|IFF_LOOPBACK))
1487 * Get its netmask and OR it into our mask.
1489 if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1491 mask |= INET_ADDR(ifreq.ifr_addr);
1494 if (ifr->ifr_addr.sa_len > sizeof (ifr->ifr_addr))
1495 ifr = (struct ifreq *)((caddr_t)ifr + (ifr->ifr_addr.sa_len - sizeof (ifr->ifr_addr)));
1503 strioctl(fd, cmd, ptr, ilen, olen)
1504 int fd, cmd, ilen, olen;
1507 struct strioctl str;
1513 if (ioctl(fd, I_STR, &str) == -1)
1515 if (str.ic_len != olen)
1516 syslog(LOG_DEBUG, "strioctl: expected %d bytes, got %d for cmd %x\n",
1517 olen, str.ic_len, cmd);
1522 * Use the hostid as part of the random number seed.
1531 * Code for locking/unlocking the serial device.
1532 * This code is derived from chat.c.
1535 #if !defined(HDB) && !defined(SUNOS3)
1536 #define HDB 1 /* ascii lock files are the default */
1542 # define LOCK_PREFIX "/usr/spool/locks/LCK.."
1544 # define LOCK_PREFIX "/usr/spool/uucp/LCK.."
1546 #endif /* LOCK_DIR */
1548 static char *lock_file; /* name of lock file created */
1551 * lock - create a lock file for the named device.
1557 char hdb_lock_buffer[12];
1561 if ((p = strrchr(dev, '/')) != NULL)
1563 lock_file = malloc(strlen(LOCK_PREFIX) + strlen(dev) + 1);
1564 if (lock_file == NULL)
1565 novm("lock file name");
1566 strcat(strcpy(lock_file, LOCK_PREFIX), dev);
1568 while ((fd = open(lock_file, O_EXCL | O_CREAT | O_RDWR, 0644)) < 0) {
1570 && (fd = open(lock_file, O_RDONLY, 0)) >= 0) {
1571 /* Read the lock file to find out who has the device locked */
1573 n = read(fd, hdb_lock_buffer, 11);
1575 hdb_lock_buffer[n] = 0;
1576 pid = atoi(hdb_lock_buffer);
1579 n = read(fd, &pid, sizeof(pid));
1582 syslog(LOG_ERR, "Can't read pid from lock file %s", lock_file);
1585 if (kill(pid, 0) == -1 && errno == ESRCH) {
1586 /* pid no longer exists - remove the lock file */
1587 if (unlink(lock_file) == 0) {
1589 syslog(LOG_NOTICE, "Removed stale lock on %s (pid %d)",
1593 syslog(LOG_WARNING, "Couldn't remove stale lock on %s",
1596 syslog(LOG_NOTICE, "Device %s is locked by pid %d",
1601 syslog(LOG_ERR, "Can't create lock file %s: %m", lock_file);
1608 sprintf(hdb_lock_buffer, "%10d\n", getpid());
1609 write(fd, hdb_lock_buffer, 11);
1612 write(fd, &pid, sizeof pid);
1620 * unlock - remove our lockfile
1633 set_filters(pass, active)
1634 struct bpf_program *pass, *active;
1640 bpf_compile(program, buf, optimize)
1641 struct bpf_program *program;
1655 bpf_filter(pc, p, wirelen, buflen)
1656 struct bpf_insn *pc;