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,
28 #define RCSID "$Id: sys-osf.c,v 1.31 1999/12/23 01:35:28 paulus Exp $"
43 #include <sys/types.h>
44 #include <sys/param.h>
45 #include <sys/socket.h>
46 #include <sys/stream.h>
47 #include <sys/stropts.h>
51 #include <sys/ioctl.h>
53 #include <net/if_dl.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>
59 #include <arpa/inet.h>
63 static const char rcsid[] = RCSID;
66 static int fdmuxid = -1;
70 static int restore_term;
71 static struct termios inittermios;
72 static struct winsize wsinfo; /* Initial window size info */
73 static pid_t tty_sid; /* PID of our session leader */
75 extern u_char inpacket_buf[]; /* borrowed from main.c */
77 static int link_mtu, link_mru;
80 static int tty_nmodules;
81 static char tty_modules[NMODULES][FMNAMESZ+1];
83 static int closed_stdio;
84 static int initfdflags = -1;
85 static int orig_ttyfd = -1;
87 static int if_is_up; /* Interface has been marked up */
88 static u_int32_t ifaddrs[2]; /* local and remote addresses */
89 static u_int32_t default_route_gateway; /* Gateway for default route added */
90 static u_int32_t proxy_arp_addr; /* Addr for proxy arp entry added */
92 #define MAX_POLLFDS 32
93 static struct pollfd pollfds[MAX_POLLFDS];
96 /* Prototypes for procedures local to this file. */
97 static int translate_speed __P((int));
98 static int baud_rate_of __P((int));
99 static int get_ether_addr __P((u_int32_t, struct sockaddr *));
100 static int strioctl __P((int, int, void *, int, int));
104 * sys_init - System-dependent initialization.
111 openlog("pppd", LOG_PID | LOG_NDELAY, LOG_PPP);
112 setlogmask(LOG_UPTO(LOG_INFO));
114 setlogmask(LOG_UPTO(LOG_DEBUG));
116 /* Get an internet socket for doing socket ioctl's on. */
117 if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
118 fatal("Couldn't create IP socket: %m");
121 tty_sid = getsid((pid_t)0);
124 * Open the ppp device.
126 pppfd = open("/dev/streams/ppp", O_RDWR | O_NONBLOCK, 0);
128 fatal("Can't open /dev/streams/ppp: %m");
130 x = PPPDBG_LOG + PPPDBG_DRIVER;
131 strioctl(pppfd, PPPIO_DEBUG, &x, sizeof(int), 0);
134 /* Assign a new PPA and get its unit number. */
135 if (strioctl(pppfd, PPPIO_NEWPPA, &ifunit, 0, sizeof(int)) < 0)
136 fatal("Can't create new PPP interface: %m");
139 * Open the ppp device again and push the if_ppp module on it.
141 iffd = open("/dev/streams/ppp", O_RDWR, 0);
143 fatal("Can't open /dev/streams/ppp (2): %m");
145 x = PPPDBG_LOG + PPPDBG_DRIVER;
146 strioctl(iffd, PPPIO_DEBUG, &x, sizeof(int), 0);
148 if (strioctl(iffd, PPPIO_ATTACH, &ifunit, sizeof(int), 0) < 0)
149 fatal("Couldn't attach ppp interface to device: %m");
150 if (ioctl(iffd, I_PUSH, "if_ppp") < 0)
151 fatal("Can't push ppp interface module: %m");
153 x = PPPDBG_LOG + PPPDBG_IF;
154 strioctl(iffd, PPPIO_DEBUG, &x, sizeof(int), 0);
156 if (strioctl(iffd, PPPIO_NEWPPA, &ifunit, sizeof(int), 0) < 0)
157 fatal("Couldn't create ppp interface unit: %m");
159 if (strioctl(iffd, PPPIO_BIND, &x, sizeof(int), 0) < 0)
160 fatal("Couldn't bind ppp interface to IP SAP: %m");
166 * sys_cleanup - restore any system state we modified before exiting:
167 * mark the interface down, delete default route and/or proxy arp entry.
168 * This shouldn't call die() because it's called from die().
176 cifaddr(0, ifaddrs[0], ifaddrs[1]);
177 if (default_route_gateway)
178 cifdefaultroute(0, 0, default_route_gateway);
180 cifproxyarp(0, proxy_arp_addr);
184 * sys_close - Clean up in a child process before execing.
196 * sys_check_options - check the options that the user specified
206 * daemon - Detach us from controlling terminal session.
209 daemon(nochdir, noclose)
210 int nochdir, noclose;
214 if ((pid = fork()) < 0)
217 exit(0); /* parent dies */
222 fclose(stdin); /* don't need stdin, stdout, stderr */
231 * ppp_available - check whether the system has any ppp interfaces
238 return stat("/dev/streams/ppp", &buf) >= 0;
241 char pipename[] = "/dev/streams/pipe";
244 * streampipe -- Opens a STREAMS based pipe. Used by streamify().
248 streampipe(int fd[2])
250 if ((fd[0]=open(pipename, O_RDWR)) == -1)
252 else if ((fd[1]=open(pipename, O_RDWR)) == -1) {
255 } else if (ioctl(fd[0], I_PIPE, fd[1]) != 0) {
260 return(ioctl(fd[0], I_PUSH, "pipemod"));
265 * streamify -- Needed for Digital UNIX, since some tty devices are not STREAMS
266 * modules (but ptys are, and pipes can be).
269 #define BUFFSIZE 1000 /* Size of buffer for streamify() */
276 int ret, fret, rret, maxfd;
277 static char buffer[BUFFSIZE];
280 if (streampipe(fdes) != 0)
281 error("streampipe(): %m\n");
282 else if (isastream(fdes[0]) == 1) {
283 if ((fret=fork()) < 0) {
284 error("fork(): %m\n");
285 } else if (fret == 0) {
286 /* Process to forward things from pipe to tty */
287 sigemptyset(&(sa.sa_mask));
288 sa.sa_handler = SIG_DFL;
290 sigaction(SIGHUP, &sa, NULL); /* Go back to default actions */
291 sigaction(SIGINT, &sa, NULL); /* for changed signals. */
292 sigaction(SIGTERM, &sa, NULL);
293 sigaction(SIGCHLD, &sa, NULL);
294 sigaction(SIGUSR1, &sa, NULL);
295 sigaction(SIGUSR2, &sa, NULL);
298 maxfd = (fdes[1]>fd)?fdes[1]:fd;
301 FD_SET(fdes[1], &readfds);
302 FD_SET(fd, &readfds);
303 ret = select(maxfd+1, &readfds, NULL, NULL, NULL);
304 if (FD_ISSET(fd, &readfds)) {
305 rret = read(fd, buffer, BUFFSIZE);
307 SYSDEBUG(("slave died: EOF on tty."));
310 write(fdes[1], buffer, rret);
313 if (FD_ISSET(fdes[1], &readfds)) {
314 rret = read(fdes[1], buffer, BUFFSIZE);
316 SYSDEBUG(("slave died: EOF on pipe."));
319 write(fd, buffer, rret);
334 * establish_ppp - Turn the serial port into a ppp interface.
342 if (isastream(fd) != 1) {
343 if ((ttyfd = fd = streamify(fd)) < 0)
344 fatal("Couldn't get a STREAMS module!\n");
347 /* Pop any existing modules off the tty stream. */
349 if (ioctl(fd, I_LOOK, tty_modules[i]) < 0
350 || ioctl(fd, I_POP, 0) < 0)
352 error("popping module %s\n", tty_modules[i]);
357 /* Push the async hdlc module and the compressor module. */
358 if (ioctl(fd, I_PUSH, "ppp_ahdl") < 0)
359 fatal("Couldn't push PPP Async HDLC module: %m");
360 if (ioctl(fd, I_PUSH, "ppp_comp") < 0)
361 error("Couldn't push PPP compression module: %m");
363 /* read mode, message non-discard mode */
364 if (ioctl(fd, I_SRDOPT, RMSGN|RPROTNORM) < 0)
365 fatal("ioctl(I_SRDOPT, RMSGN): %m");
367 /* Link the serial port under the PPP multiplexor. */
368 if ((fdmuxid = ioctl(pppfd, I_LINK, fd)) < 0)
369 fatal("Can't link tty to PPP mux: %m");
371 /* close stdin, stdout, stderr if they might refer to the device */
372 if (default_device && !closed_stdio) {
375 for (i = 0; i <= 2; ++i)
376 if (i != fd && i != sockfd)
379 /* make sure 0, 1, 2 are open to /dev/null */
380 while ((i = open("/dev/null", O_RDWR)) >= 0) {
389 * Set device for non-blocking reads.
390 * XXX why do we need to do this? don't we use pppfd not fd?
392 if ((initfdflags = fcntl(fd, F_GETFL)) == -1
393 || fcntl(fd, F_SETFL, initfdflags | O_NONBLOCK) == -1) {
394 warn("Couldn't set device to non-blocking mode: %m");
401 * restore_loop - reattach the ppp unit to the loopback.
402 * This doesn't need to do anything because disestablish_ppp does it.
410 * disestablish_ppp - Restore the serial port to normal operation.
411 * It attempts to reconstruct the stream with the previously popped
412 * modules. This shouldn't call die() because it's called from die().
421 if (ioctl(pppfd, I_UNLINK, fdmuxid) < 0) {
423 error("Can't unlink tty from PPP mux: %m");
427 /* Reset non-blocking mode on the file descriptor. */
428 if (initfdflags != -1 && fcntl(fd, F_SETFL, initfdflags) < 0)
429 warn("Couldn't restore device fd flags: %m");
433 while (ioctl(fd, I_POP, 0) >= 0)
435 for (i = tty_nmodules - 1; i >= 0; --i)
436 if (ioctl(fd, I_PUSH, tty_modules[i]) < 0)
437 error("Couldn't restore tty module %s: %m",
441 if (hungup && default_device && tty_sid > 0) {
443 * If we have received a hangup, we need to send a SIGHUP
444 * to the terminal's controlling process. The reason is
445 * that the original stream head for the terminal hasn't
446 * seen the M_HANGUP message (it went up through the ppp
447 * driver to the stream head for our fd to /dev/ppp).
449 dbglog("sending hangup to %d", tty_sid);
450 if (kill(tty_sid, SIGHUP) < 0)
451 error("couldn't kill pgrp: %m");
453 if (orig_ttyfd >= 0) {
455 (void)wait((void *)0);
463 * Check whether the link seems not to be 8-bit clean.
471 if (strioctl(pppfd, PPPIO_GCLEAN, &x, 0, sizeof(x)) < 0)
476 s = "bit 7 set to 1";
479 s = "bit 7 set to 0";
489 warn("Serial link is not 8-bit clean:");
490 warn("All received characters had %s", s);
495 * List of valid speeds.
498 int speed_int, speed_val;
570 * Translate from bits/second to a speed_t.
576 struct speed *speedp;
580 for (speedp = speeds; speedp->speed_int; speedp++)
581 if (bps == speedp->speed_int)
582 return speedp->speed_val;
583 warn("speed %d not supported", bps);
588 * Translate from a speed_t to bits/second.
594 struct speed *speedp;
598 for (speedp = speeds; speedp->speed_int; speedp++)
599 if (speed == speedp->speed_val)
600 return speedp->speed_int;
605 * set_up_tty: Set up the serial port on `fd' for 8 bits, no parity,
606 * at the requested speed, etc. If `local' is true, set CLOCAL
607 * regardless of whether the modem option was specified.
610 set_up_tty(fd, local)
616 if (tcgetattr(fd, &tios) < 0)
617 fatal("tcgetattr: %m");
621 ioctl(fd, TIOCGWINSZ, &wsinfo);
624 tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL);
626 tios.c_cflag |= CRTSCTS;
627 else if (crtscts < 0)
628 tios.c_cflag &= ~CRTSCTS;
630 tios.c_cflag |= CS8 | CREAD | HUPCL;
632 tios.c_cflag |= CLOCAL;
633 tios.c_iflag = IGNBRK | IGNPAR;
637 tios.c_cc[VTIME] = 0;
640 tios.c_iflag |= IXON | IXOFF;
641 tios.c_cc[VSTOP] = 0x13; /* DC3 = XOFF = ^S */
642 tios.c_cc[VSTART] = 0x11; /* DC1 = XON = ^Q */
645 speed = translate_speed(inspeed);
647 cfsetospeed(&tios, speed);
648 cfsetispeed(&tios, speed);
650 speed = cfgetospeed(&tios);
652 * We can't proceed if the serial port speed is 0,
653 * since that implies that the serial port is disabled.
656 fatal("Baud rate for %s is 0; need explicit baud rate", devnam);
659 if (tcsetattr(fd, TCSAFLUSH, &tios) < 0)
660 fatal("tcsetattr: %m");
662 baud_rate = inspeed = baud_rate_of(speed);
667 * restore_tty - restore the terminal to the saved settings.
674 if (!default_device) {
676 * Turn off echoing, because otherwise we can get into
677 * a loop with the tty and the modem echoing to each other.
678 * We presume we are the sole user of this tty device, so
679 * when we close it, it will revert to its defaults anyway.
681 inittermios.c_lflag &= ~(ECHO | ECHONL);
683 if (tcsetattr(fd, TCSAFLUSH, &inittermios) < 0)
684 if (!hungup && errno != ENXIO)
685 warn("tcsetattr: %m");
686 ioctl(fd, TIOCSWINSZ, &wsinfo);
692 * setdtr - control the DTR line on the serial port.
693 * This is called from die(), so it shouldn't call die().
699 int modembits = TIOCM_DTR;
701 ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits);
705 * open_loopback - open the device we use for getting packets
706 * in demand mode. Under Digital Unix, we use our existing fd
716 * output - Output PPP packet.
729 dbglog("sent %P", p, len);
732 data.buf = (caddr_t) p;
734 while (putmsg(pppfd, NULL, &data, 0) < 0) {
735 if (--retries < 0 || (errno != EWOULDBLOCK && errno != EAGAIN)) {
737 error("Couldn't send packet: %m");
741 pfd.events = POLLOUT;
742 poll(&pfd, 1, 250); /* wait for up to 0.25 seconds */
748 * wait_input - wait until there is data available on fd,
749 * for the length of time specified by *timo (indefinite
754 struct timeval *timo;
758 t = timo == NULL? -1: timo->tv_sec * 1000 + timo->tv_usec / 1000;
759 if (poll(pollfds, n_pollfds, t) < 0 && errno != EINTR)
764 * add_fd - add an fd to the set that wait_input waits for.
771 for (n = 0; n < n_pollfds; ++n)
772 if (pollfds[n].fd == fd)
774 if (n_pollfds < MAX_POLLFDS) {
775 pollfds[n_pollfds].fd = fd;
776 pollfds[n_pollfds].events = POLLIN | POLLPRI | POLLHUP;
779 error("Too many inputs!");
783 * remove_fd - remove an fd from the set that wait_input waits for.
790 for (n = 0; n < n_pollfds; ++n) {
791 if (pollfds[n].fd == fd) {
792 while (++n < n_pollfds)
793 pollfds[n-1] = pollfds[n];
802 * wait_loop_output - wait until there is data available on the
803 * loopback, for the length of time specified by *timo (indefinite
807 wait_loop_output(timo)
808 struct timeval *timo;
816 * wait_time - wait for a given length of time or until a
817 * signal is received. Called by ccp_test
821 struct timeval *timo;
825 n = select(0, NULL, NULL, NULL, timo);
826 if (n < 0 && errno != EINTR)
831 * read_packet - get a PPP packet from the serial device.
837 struct strbuf ctrl, data;
839 unsigned char ctrlbuf[64];
842 data.maxlen = PPP_MRU + PPP_HDRLEN;
843 data.buf = (caddr_t) buf;
844 ctrl.maxlen = sizeof(ctrlbuf);
845 ctrl.buf = (caddr_t) ctrlbuf;
847 len = getmsg(pppfd, &ctrl, &data, &flags);
849 if (errno == EAGAIN || errno == EWOULDBLOCK || errno == EINTR)
851 fatal("Error reading packet: %m");
858 * Got a M_PROTO or M_PCPROTO message. Huh?
861 dbglog("got ctrl msg len=%d", ctrl.len);
867 * get_loop_output - get outgoing packets from the ppp device,
868 * and detect when we want to bring the real link up.
869 * Return value is 1 if we need to bring up the link, 0 otherwise.
877 while ((len = read_packet(inpacket_buf)) > 0) {
878 if (loop_frame(inpacket_buf, len))
885 * ppp_send_config - configure the transmit characteristics of
889 ppp_send_config(unit, mtu, asyncmap, pcomp, accomp)
897 if (strioctl(pppfd, PPPIO_MTU, &mtu, sizeof(mtu), 0) < 0) {
898 if (hungup && errno == ENXIO)
900 error("Couldn't set MTU: %m");
902 if (strioctl(pppfd, PPPIO_XACCM, &asyncmap, sizeof(asyncmap), 0) < 0) {
903 error("Couldn't set transmit ACCM: %m");
905 cf[0] = (pcomp? COMP_PROT: 0) + (accomp? COMP_AC: 0);
906 cf[1] = COMP_PROT | COMP_AC;
907 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
908 error("Couldn't set prot/AC compression: %m");
913 * ppp_set_xaccm - set the extended transmit ACCM for the interface.
916 ppp_set_xaccm(unit, accm)
920 if (strioctl(pppfd, PPPIO_XACCM, accm, sizeof(ext_accm), 0) < 0) {
921 if (!hungup || errno != ENXIO)
922 warn("Couldn't set extended ACCM: %m");
927 * ppp_recv_config - configure the receive-side characteristics of
931 ppp_recv_config(unit, mru, asyncmap, pcomp, accomp)
939 if (strioctl(pppfd, PPPIO_MRU, &mru, sizeof(mru), 0) < 0) {
940 if (hungup && errno == ENXIO)
942 error("Couldn't set MRU: %m");
944 if (strioctl(pppfd, PPPIO_RACCM, &asyncmap, sizeof(asyncmap), 0) < 0) {
945 error("Couldn't set receive ACCM: %m");
947 cf[0] = (pcomp? DECOMP_PROT: 0) + (accomp? DECOMP_AC: 0);
948 cf[1] = DECOMP_PROT | DECOMP_AC;
949 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
950 error("Couldn't set prot/AC decompression: %m");
955 * ccp_test - ask kernel whether a given compression method
956 * is acceptable for use.
958 * In Digital UNIX the memory buckets for chunks >16K are not
959 * primed when the system comes up. That means we're not
960 * likely to get the memory needed for the compressor on
961 * the first try. The way we work around this is to have
962 * the driver spin off a thread to go get the memory for us
963 * (we can't block at that point in a streams context.)
965 * This code synchronizes with the thread when it has returned
966 * with the memory we need. The driver will continue to return
967 * with EAGAIN until the thread comes back. We give up here
968 * if after 10 attempts in one second we still don't have memory.
969 * It's up to the driver to not lose track of that memory if
970 * thread takes too long to return.
973 ccp_test(unit, opt_ptr, opt_len, for_transmit)
974 int unit, opt_len, for_transmit;
981 tval.tv_usec = 100000;
982 for (i = 0; i < 10; ++i) {
983 if (strioctl(pppfd, (for_transmit? PPPIO_XCOMP: PPPIO_RCOMP),
984 opt_ptr, opt_len, 0) >= 0) {
992 error("hard failure trying to get memory for a compressor: %m");
993 return (errno == ENOSR)? 0: -1;
997 * ccp_flags_set - inform kernel about the current state of CCP.
1000 ccp_flags_set(unit, isopen, isup)
1001 int unit, isopen, isup;
1005 cf[0] = (isopen? CCP_ISOPEN: 0) + (isup? CCP_ISUP: 0);
1006 cf[1] = CCP_ISOPEN | CCP_ISUP | CCP_ERROR | CCP_FATALERROR;
1007 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
1008 if (!hungup || errno != ENXIO)
1009 error("Couldn't set kernel CCP state: %m");
1014 * get_idle_time - return how long the link has been idle.
1017 get_idle_time(u, ip)
1019 struct ppp_idle *ip;
1021 return strioctl(pppfd, PPPIO_GIDLE, ip, 0, sizeof(struct ppp_idle)) >= 0;
1025 * get_ppp_stats - return statistics for the link.
1028 get_ppp_stats(u, stats)
1030 struct pppd_stats *stats;
1034 if (strioctl(pppfd, PPPIO_GETSTAT, &s, 0, sizeof(s)) < 0) {
1035 error("Couldn't get link statistics: %m");
1038 stats->bytes_in = s.p.ppp_ibytes;
1039 stats->bytes_out = s.p.ppp_obytes;
1045 * ccp_fatal_error - returns 1 if decompression was disabled as a
1046 * result of an error detected after decompression of a packet,
1047 * 0 otherwise. This is necessary because of patent nonsense.
1050 ccp_fatal_error(unit)
1056 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
1057 if (errno != ENXIO && errno != EINVAL)
1058 error("Couldn't get compression flags: %m");
1061 return cf[0] & CCP_FATALERROR;
1065 * sifvjcomp - config tcp header compression
1068 sifvjcomp(u, vjcomp, xcidcomp, xmaxcid)
1069 int u, vjcomp, xcidcomp, xmaxcid;
1075 maxcid[0] = xcidcomp;
1076 maxcid[1] = 15; /* XXX should be rmaxcid */
1077 if (strioctl(pppfd, PPPIO_VJINIT, maxcid, sizeof(maxcid), 0) < 0) {
1078 error("Couldn't initialize VJ compression: %m");
1082 cf[0] = (vjcomp? COMP_VJC + DECOMP_VJC: 0) /* XXX this is wrong */
1083 + (xcidcomp? COMP_VJCCID + DECOMP_VJCCID: 0);
1084 cf[1] = COMP_VJC + DECOMP_VJC + COMP_VJCCID + DECOMP_VJCCID;
1085 if (strioctl(pppfd, PPPIO_CFLAGS, cf, sizeof(cf), sizeof(int)) < 0) {
1087 error("Couldn't enable VJ compression: %m");
1094 * sifup - Config the interface up and enable IP packets to pass.
1102 strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
1103 if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) < 0) {
1104 error("Couldn't mark interface up (get): %m");
1107 ifr.ifr_flags |= IFF_UP;
1108 if (ioctl(sockfd, SIOCSIFFLAGS, &ifr) < 0) {
1109 error("Couldn't mark interface up (set): %m");
1117 * sifdown - Config the interface down and disable IP.
1125 bzero(&ifr, sizeof(ifr));
1126 strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
1127 if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) < 0) {
1128 error("Couldn't mark interface down (get): %m");
1131 if ((ifr.ifr_flags & IFF_UP) != 0) {
1132 ifr.ifr_flags &= ~IFF_UP;
1133 if (ioctl(sockfd, SIOCSIFFLAGS, &ifr) < 0) {
1134 error("Couldn't mark interface down (set): %m");
1143 * sifnpmode - Set the mode for handling packets for a given NP.
1146 sifnpmode(u, proto, mode)
1154 npi[1] = (int) mode;
1155 if (strioctl(pppfd, PPPIO_NPMODE, npi, 2 * sizeof(int), 0) < 0) {
1156 error("ioctl(set NP %d mode to %d): %m", proto, mode);
1162 #define INET_ADDR(x) (((struct sockaddr_in *) &(x))->sin_addr.s_addr)
1165 * SET_SA_FAMILY - initialize a struct sockaddr, setting the sa_family field.
1167 #define SET_SA_FAMILY(addr, family) \
1168 BZERO((char *) &(addr), sizeof(addr)); \
1169 addr.sa_family = (family); \
1170 addr.sa_len = sizeof ((addr))
1173 * sifaddr - Config the interface IP addresses and netmask.
1181 struct ifaliasreq addreq;
1186 /* flush old address, if any
1188 bzero(&ifr, sizeof (ifr));
1189 strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
1190 SET_SA_FAMILY(ifr.ifr_addr, AF_INET);
1191 ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = o;
1192 if ((ioctl(sockfd, (int)SIOCDIFADDR, (caddr_t) &ifr) < 0)
1193 && errno != EADDRNOTAVAIL) {
1194 error("ioctl(SIOCDIFADDR): %m");
1198 bzero(&addreq, sizeof (addreq));
1199 strlcpy(addreq.ifra_name, ifname, sizeof (addreq.ifra_name));
1200 SET_SA_FAMILY(addreq.ifra_addr, AF_INET);
1201 SET_SA_FAMILY(addreq.ifra_broadaddr, AF_INET);
1202 ((struct sockaddr_in *)&addreq.ifra_addr)->sin_addr.s_addr = o;
1203 ((struct sockaddr_in *)&addreq.ifra_broadaddr)->sin_addr.s_addr = h;
1206 ((struct sockaddr_in *)&addreq.ifra_mask)->sin_addr.s_addr = m;
1207 addreq.ifra_mask.sa_len = sizeof (struct sockaddr);
1208 info("Setting interface mask to %s\n", ip_ntoa(m));
1211 /* install new src/dst and (possibly) netmask
1213 if (ioctl(sockfd, SIOCPIFADDR, &addreq) < 0) {
1214 error("ioctl(SIOCPIFADDR): %m");
1218 ifr.ifr_data = (caddr_t)&link_mtu;
1220 if (ioctl(sockfd, SIOCSIPMTU, &ifr) < 0) {
1221 error("Couldn't set IP MTU: %m");
1232 * cifaddr - Clear the interface IP addresses, and delete routes
1233 * through the interface if possible.
1244 bzero(&ifr, sizeof (ifr));
1245 strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
1246 SET_SA_FAMILY(ifr.ifr_addr, AF_INET);
1247 ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = o;
1248 if (ioctl(sockfd, (int)SIOCDIFADDR, (caddr_t) &ifr) < 0) {
1249 error("ioctl(SIOCDIFADDR): %m");
1257 * sifdefaultroute - assign a default route through the address given.
1260 sifdefaultroute(u, l, g)
1266 BZERO(&rt, sizeof(rt));
1267 SET_SA_FAMILY(rt.rt_dst, AF_INET);
1268 SET_SA_FAMILY(rt.rt_gateway, AF_INET);
1269 ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = g;
1270 rt.rt_flags = RTF_GATEWAY;
1271 if (ioctl(sockfd, (int)SIOCADDRT, &rt) < 0) {
1272 error("default route ioctl(SIOCADDRT): %m");
1275 default_route_gateway = g;
1281 * cifdefaultroute - delete a default route through the address given.
1284 cifdefaultroute(u, l, g)
1290 BZERO(&rt, sizeof(rt));
1291 SET_SA_FAMILY(rt.rt_dst, AF_INET);
1292 SET_SA_FAMILY(rt.rt_gateway, AF_INET);
1293 ((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = g;
1294 rt.rt_flags = RTF_GATEWAY;
1295 if (ioctl(sockfd, (int)SIOCDELRT, &rt) < 0) {
1296 error("default route ioctl(SIOCDELRT): %m");
1299 default_route_gateway = 0;
1304 * sifproxyarp - Make a proxy ARP entry for the peer.
1307 sifproxyarp(unit, hisaddr)
1311 struct arpreq arpreq;
1313 BZERO(&arpreq, sizeof(arpreq));
1316 * Get the hardware address of an interface on the same subnet
1317 * as our local address.
1319 if (!get_ether_addr(hisaddr, &arpreq.arp_ha)) {
1320 warn("Cannot determine ethernet address for proxy ARP");
1324 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
1325 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
1326 arpreq.arp_flags = ATF_PERM | ATF_PUBL;
1327 if (ioctl(sockfd, (int)SIOCSARP, (caddr_t)&arpreq) < 0) {
1328 error("ioctl(SIOCSARP): %m");
1332 proxy_arp_addr = hisaddr;
1338 * cifproxyarp - Delete the proxy ARP entry for the peer.
1341 cifproxyarp(unit, hisaddr)
1345 struct arpreq arpreq;
1347 BZERO(&arpreq, sizeof(arpreq));
1348 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
1349 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
1350 if (ioctl(sockfd, (int)SIOCDARP, (caddr_t)&arpreq) < 0) {
1351 error("ioctl(SIOCDARP): %m");
1359 * get_ether_addr - get the hardware address of an interface on the
1360 * the same subnet as ipaddr.
1365 get_ether_addr(ipaddr, hwaddr)
1367 struct sockaddr *hwaddr;
1369 struct ifreq *ifr, *ifend;
1370 u_int32_t ina, mask;
1373 struct ifreq ifs[MAX_IFS];
1374 struct ifdevea ifdevreq;
1376 ifc.ifc_len = sizeof(ifs);
1378 if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1379 error("ioctl(SIOCGIFCONF): %m");
1384 * Scan through looking for an interface with an Internet
1385 * address on the same subnet as `ipaddr'.
1387 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1388 for (ifr = ifc.ifc_req; ifr < ifend; ifr++) {
1389 if (ifr->ifr_addr.sa_family == AF_INET) {
1392 * Check that the interface is up, and not point-to-point
1395 strlcpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1396 if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1398 if ((ifreq.ifr_flags &
1399 (IFF_UP|IFF_BROADCAST|IFF_POINTOPOINT|IFF_LOOPBACK|IFF_NOARP))
1400 != (IFF_UP|IFF_BROADCAST))
1404 * Get its netmask and check that it's on the right subnet.
1406 if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1408 ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
1409 mask = ((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr.s_addr;
1410 if ((ipaddr & mask) != (ina & mask))
1415 if (ifr->ifr_addr.sa_len > sizeof (ifr->ifr_addr))
1416 ifr = (struct ifreq *)((caddr_t)ifr + (ifr->ifr_addr.sa_len - sizeof (ifr->ifr_addr)));
1422 info("found interface %s for proxy arp", ifr->ifr_name);
1424 strlcpy(ifdevreq.ifr_name, ifr->ifr_name, sizeof(ifdevreq.ifr_name));
1426 if (ioctl(sockfd, (int)SIOCRPHYSADDR, &ifdevreq) < 0) {
1427 perror("ioctl(SIOCRPHYSADDR)");
1431 hwaddr->sa_family = AF_UNSPEC;
1432 memcpy(hwaddr->sa_data, ifdevreq.current_pa, sizeof(ifdevreq.current_pa));
1436 #define WTMPFILE "/usr/adm/wtmp"
1439 logwtmp(line, name, host)
1440 const char *line, *name, *host;
1446 if ((fd = open(WTMPFILE, O_WRONLY|O_APPEND, 0)) < 0)
1448 if (!fstat(fd, &buf)) {
1449 strncpy(ut.ut_line, line, sizeof(ut.ut_line));
1450 strncpy(ut.ut_name, name, sizeof(ut.ut_name));
1451 strncpy(ut.ut_host, host, sizeof(ut.ut_host));
1452 (void)time(&ut.ut_time);
1453 if (write(fd, (char *)&ut, sizeof(struct utmp)) != sizeof(struct utmp))
1454 (void)ftruncate(fd, buf.st_size);
1460 * Return user specified netmask, modified by any mask we might determine
1461 * for address `addr' (in network byte order).
1462 * Here we scan through the system's list of interfaces, looking for
1463 * any non-point-to-point interfaces which might appear to be on the same
1464 * network as `addr'. If we find any, we OR in their netmask to the
1465 * user-specified netmask.
1471 u_int32_t mask, nmask, ina;
1472 struct ifreq *ifr, *ifend, ifreq;
1476 if (IN_CLASSA(addr)) /* determine network mask for address class */
1477 nmask = IN_CLASSA_NET;
1478 else if (IN_CLASSB(addr))
1479 nmask = IN_CLASSB_NET;
1481 nmask = IN_CLASSC_NET;
1482 /* class D nets are disallowed by bad_ip_adrs */
1483 mask = netmask | htonl(nmask);
1486 * Scan through the system's network interfaces.
1488 ifc.ifc_len = MAX_IFS * sizeof(struct ifreq);
1489 ifc.ifc_req = (struct ifreq *)alloca(ifc.ifc_len);
1490 if (ifc.ifc_req == 0)
1492 if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1493 warn("Couldn't get system interface list: %m");
1496 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1497 for (ifr = ifc.ifc_req; ifr < ifend; ifr++) {
1499 * Check the interface's internet address.
1501 if (ifr->ifr_addr.sa_family == AF_INET) {
1502 ina = INET_ADDR(ifr->ifr_addr);
1503 if ((ntohl(ina) & nmask) != (addr & nmask))
1506 * Check that the interface is up, and not point-to-point or loopback.
1508 strlcpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1509 if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1511 if ((ifreq.ifr_flags & (IFF_UP|IFF_POINTOPOINT|IFF_LOOPBACK))
1515 * Get its netmask and OR it into our mask.
1517 if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1519 mask |= INET_ADDR(ifreq.ifr_addr);
1522 if (ifr->ifr_addr.sa_len > sizeof (ifr->ifr_addr))
1523 ifr = (struct ifreq *)((caddr_t)ifr + (ifr->ifr_addr.sa_len - sizeof (ifr->ifr_addr)));
1531 * have_route_to - determine if the system has any route to
1532 * a given IP address. `addr' is in network byte order.
1533 * For demand mode to work properly, we have to ignore routes
1534 * through our own interface.
1536 int have_route_to(u_int32_t addr)
1542 strioctl(fd, cmd, ptr, ilen, olen)
1543 int fd, cmd, ilen, olen;
1546 struct strioctl str;
1552 if (ioctl(fd, I_STR, &str) == -1)
1554 if (str.ic_len != olen)
1555 dbglog("strioctl: expected %d bytes, got %d for cmd %x\n",
1556 olen, str.ic_len, cmd);
1561 * Use the hostid as part of the random number seed.
1570 * get_pty - get a pty master/slave pair and chown the slave side
1571 * to the uid given. Assumes slave_name points to >= 12 bytes of space.
1574 get_pty(master_fdp, slave_fdp, slave_name, uid)
1582 struct termios tios;
1585 for (i = 0; i < 64; ++i) {
1586 slprintf(pty_name, sizeof(pty_name), "/dev/pty%c%x",
1587 'p' + i / 16, i % 16);
1588 mfd = open(pty_name, O_RDWR, 0);
1591 sfd = open(pty_name, O_RDWR | O_NOCTTY, 0);
1600 strlcpy(slave_name, pty_name, 12);
1603 fchown(sfd, uid, -1);
1604 fchmod(sfd, S_IRUSR | S_IWUSR);
1605 if (tcgetattr(sfd, &tios) == 0) {
1606 tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB);
1607 tios.c_cflag |= CS8 | CREAD;
1608 tios.c_iflag = IGNPAR | CLOCAL;
1611 if (tcsetattr(sfd, TCSAFLUSH, &tios) < 0)
1612 warn("couldn't set attributes on pty: %m");
1614 warn("couldn't get attributes on pty: %m");
1621 * Code for locking/unlocking the serial device.
1622 * This code is derived from chat.c.
1625 #if !defined(HDB) && !defined(SUNOS3)
1626 #define HDB 1 /* ascii lock files are the default */
1632 # define LOCK_PREFIX "/usr/spool/locks/LCK.."
1634 # define LOCK_PREFIX "/usr/spool/uucp/LCK.."
1636 #endif /* LOCK_DIR */
1638 static char *lock_file; /* name of lock file created */
1641 * lock - create a lock file for the named device.
1647 char hdb_lock_buffer[12];
1652 if ((p = strrchr(dev, '/')) != NULL)
1654 l = strlen(LOCK_PREFIX) + strlen(dev) + 1;
1655 lock_file = malloc(l);
1656 if (lock_file == NULL)
1657 novm("lock file name");
1658 slprintf(lock_file, l, "%s%s", LOCK_PREFIX, dev);
1660 while ((fd = open(lock_file, O_EXCL | O_CREAT | O_RDWR, 0644)) < 0) {
1662 && (fd = open(lock_file, O_RDONLY, 0)) >= 0) {
1663 /* Read the lock file to find out who has the device locked */
1665 n = read(fd, hdb_lock_buffer, 11);
1667 hdb_lock_buffer[n] = 0;
1668 pid = atoi(hdb_lock_buffer);
1671 n = read(fd, &pid, sizeof(pid));
1674 error("Can't read pid from lock file %s", lock_file);
1677 if (kill(pid, 0) == -1 && errno == ESRCH) {
1678 /* pid no longer exists - remove the lock file */
1679 if (unlink(lock_file) == 0) {
1681 notice("Removed stale lock on %s (pid %d)",
1685 warn("Couldn't remove stale lock on %s",
1688 notice("Device %s is locked by pid %d",
1693 error("Can't create lock file %s: %m", lock_file);
1700 slprintf(hdb_lock_buffer, sizeof(hdb_lock_buffer), "%10d\n", getpid());
1701 write(fd, hdb_lock_buffer, 11);
1704 write(fd, &pid, sizeof pid);
1712 * unlock - remove our lockfile
1726 set_filters(pass, active)
1727 struct bpf_program *pass, *active;
1733 bpf_compile(program, buf, optimize)
1734 struct bpf_program *program;
1748 bpf_filter(pc, p, wirelen, buflen)
1749 struct bpf_insn *pc;