2 * sys-bsd.c - System-dependent procedures for setting up
3 * PPP interfaces on bsd-4.4-ish systems (including 386BSD, NetBSD, etc.)
5 * Copyright (c) 1989 Carnegie Mellon University.
8 * Redistribution and use in source and binary forms are permitted
9 * provided that the above copyright notice and this paragraph are
10 * duplicated in all such forms and that any documentation,
11 * advertising materials, and other materials related to such
12 * distribution and use acknowledge that the software was developed
13 * by Carnegie Mellon University. The name of the
14 * University may not be used to endorse or promote products derived
15 * from this software without specific prior written permission.
16 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
18 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
22 static char rcsid[] = "$Id: sys-bsd.c,v 1.23 1996/01/01 23:05:39 paulus Exp $";
36 #include <sys/ioctl.h>
37 #include <sys/types.h>
38 #include <sys/socket.h>
43 #include <net/ppp_defs.h>
44 #include <net/if_ppp.h>
45 #include <net/route.h>
46 #include <net/if_dl.h>
47 #include <netinet/in.h>
50 #include <netinet/if_ether.h>
55 static int initdisc = -1; /* Initial TTY discipline for ppp_fd */
56 static int initfdflags = -1; /* Initial file descriptor flags for ppp_fd */
57 static int ppp_fd = -1; /* fd which is set to PPP discipline */
60 static int restore_term; /* 1 => we've munged the terminal */
61 static struct termios inittermios; /* Initial TTY termios */
62 static struct winsize wsinfo; /* Initial window size info */
64 static char *lock_file; /* name of lock file created */
66 static int loop_slave = -1;
67 static int loop_master;
68 static char loop_name[20];
70 static unsigned char inbuf[512]; /* buffer for chars read from loopback */
72 static int sockfd; /* socket for doing interface ioctls */
74 static int if_is_up; /* the interface is currently up */
75 static u_int32_t default_route_gateway; /* gateway addr for default route */
76 static u_int32_t proxy_arp_addr; /* remote addr for proxy arp */
78 /* Prototypes for procedures local to this file. */
79 static int dodefaultroute __P((u_int32_t, int));
80 static int get_ether_addr __P((u_int32_t, struct sockaddr_dl *));
84 * sys_init - System-dependent initialization.
89 openlog("pppd", LOG_PID | LOG_NDELAY, LOG_PPP);
90 setlogmask(LOG_UPTO(LOG_INFO));
92 setlogmask(LOG_UPTO(LOG_DEBUG));
94 /* Get an internet socket for doing socket ioctl's on. */
95 if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
96 syslog(LOG_ERR, "Couldn't create IP socket: %m");
102 * sys_cleanup - restore any system state we modified before exiting:
103 * mark the interface down, delete default route and/or proxy arp entry.
104 * This should call die() because it's called from die().
112 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
113 if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) >= 0
114 && ((ifr.ifr_flags & IFF_UP) != 0)) {
115 ifr.ifr_flags &= ~IFF_UP;
116 ioctl(sockfd, SIOCSIFFLAGS, &ifr);
120 if (default_route_gateway)
121 cifdefaultroute(0, default_route_gateway);
123 cifproxyarp(0, proxy_arp_addr);
127 * sys_close - Clean up in a child process before execing.
133 if (loop_slave >= 0) {
141 * sys_check_options - check the options that the user specified
150 * note_debug_level - note a change in the debug level.
156 syslog(LOG_INFO, "Debug turned ON, Level %d", debug);
157 setlogmask(LOG_UPTO(LOG_DEBUG));
159 setlogmask(LOG_UPTO(LOG_WARNING));
164 * ppp_available - check whether the system has any ppp interfaces
165 * (in fact we check whether we can do an ioctl on ppp0).
172 extern char *no_ppp_msg;
174 if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
175 return 1; /* can't tell */
177 strncpy(ifr.ifr_name, "ppp0", sizeof (ifr.ifr_name));
178 ok = ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) >= 0;
182 This system lacks kernel support for PPP. To include PPP support\n\
183 in the kernel, please follow the steps detailed in the README.bsd\n\
184 file in the ppp-2.2 distribution.\n";
189 * establish_ppp - Turn the serial port into a ppp interface.
195 int pppdisc = PPPDISC;
200 * Demand mode - prime the old ppp device to relinquish the unit.
202 if (ioctl(ppp_fd, PPPIOCXFERUNIT, 0) < 0) {
203 syslog(LOG_ERR, "ioctl(transfer ppp unit): %m");
209 * Save the old line discipline of fd, and set it to PPP.
211 if (ioctl(fd, TIOCGETD, &initdisc) < 0) {
212 syslog(LOG_ERR, "ioctl(TIOCGETD): %m");
215 if (ioctl(fd, TIOCSETD, &pppdisc) < 0) {
216 syslog(LOG_ERR, "ioctl(TIOCSETD): %m");
222 * Find out which interface we were given.
224 if (ioctl(fd, PPPIOCGUNIT, &ifunit) < 0) {
225 syslog(LOG_ERR, "ioctl(PPPIOCGUNIT): %m");
230 * Check that we got the same unit again.
232 if (ioctl(fd, PPPIOCGUNIT, &x) < 0) {
233 syslog(LOG_ERR, "ioctl(PPPIOCGUNIT): %m");
237 syslog(LOG_ERR, "transfer_ppp failed: wanted unit %d, got %d",
242 ioctl(loop_slave, TIOCSETD, &x);
248 * Enable debug in the driver if requested.
251 if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
252 syslog(LOG_WARNING, "ioctl (PPPIOCGFLAGS): %m");
254 x |= (kdebugflag & 0xFF) * SC_DEBUG;
255 if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
256 syslog(LOG_WARNING, "ioctl(PPPIOCSFLAGS): %m");
261 * Set device for non-blocking reads.
263 if ((initfdflags = fcntl(fd, F_GETFL)) == -1
264 || fcntl(fd, F_SETFL, initfdflags | O_NONBLOCK) == -1) {
265 syslog(LOG_WARNING, "Couldn't set device to non-blocking mode: %m");
271 * transfer_ppp - make the device on fd `fd' take over the PPP interface
272 * unit that we are using.
281 return; /* we can't get here */
283 /* Reset non-blocking mode on ppp_fd. */
284 if (initfdflags != -1 && fcntl(ppp_fd, F_SETFL, initfdflags) < 0)
285 syslog(LOG_WARNING, "Couldn't restore device fd flags: %m");
289 * Prime the old ppp device to relinquish the unit.
291 if (ioctl(ppp_fd, PPPIOCXFERUNIT, 0) < 0) {
292 syslog(LOG_ERR, "ioctl(transfer ppp unit): %m");
297 * Save the old line discipline of fd, and set it to PPP.
299 if (ioctl(fd, TIOCGETD, &prevdisc) < 0) {
300 syslog(LOG_ERR, "ioctl(TIOCGETD): %m");
304 if (ioctl(fd, TIOCSETD, &x) < 0) {
305 syslog(LOG_ERR, "ioctl(TIOCSETD): %m");
310 * Set the old ppp device back to its previous discipline,
312 ioctl(ppp_fd, TIOCSETD, &initdisc);
316 * Check that we got the same unit again.
318 if (ioctl(fd, PPPIOCGUNIT, &x) < 0) {
319 syslog(LOG_ERR, "ioctl(PPPIOCGUNIT): %m");
323 syslog(LOG_ERR, "transfer_ppp failed: wanted unit %d, got %d",
331 * Set device for non-blocking reads.
333 if ((initfdflags = fcntl(fd, F_GETFL)) == -1
334 || fcntl(fd, F_SETFL, initfdflags | O_NONBLOCK) == -1) {
335 syslog(LOG_WARNING, "Couldn't set device to non-blocking mode: %m");
341 * restore_loop - reattach the ppp unit to the loopback.
349 * Transfer the ppp interface back to the loopback.
351 if (ioctl(ppp_fd, PPPIOCXFERUNIT, 0) < 0) {
352 syslog(LOG_ERR, "ioctl(transfer ppp unit): %m");
356 if (ioctl(loop_slave, TIOCSETD, &x) < 0) {
357 syslog(LOG_ERR, "ioctl(TIOCSETD): %m");
362 * Check that we got the same unit again.
364 if (ioctl(loop_slave, PPPIOCGUNIT, &x) < 0) {
365 syslog(LOG_ERR, "ioctl(PPPIOCGUNIT): %m");
369 syslog(LOG_ERR, "transfer_ppp failed: wanted unit %d, got %d",
378 * disestablish_ppp - Restore the serial port to normal operation.
379 * This shouldn't call die() because it's called from die().
385 /* Reset non-blocking mode on fd. */
386 if (initfdflags != -1 && fcntl(fd, F_SETFL, initfdflags) < 0)
387 syslog(LOG_WARNING, "Couldn't restore device fd flags: %m");
390 /* Restore old line discipline. */
391 if (initdisc >= 0 && ioctl(fd, TIOCSETD, &initdisc) < 0)
392 syslog(LOG_ERR, "ioctl(TIOCSETD): %m");
400 * Check whether the link seems not to be 8-bit clean.
408 if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) == 0) {
410 switch (~x & (SC_RCV_B7_0|SC_RCV_B7_1|SC_RCV_EVNP|SC_RCV_ODDP)) {
412 s = "bit 7 set to 1";
415 s = "bit 7 set to 0";
425 syslog(LOG_WARNING, "Serial link is not 8-bit clean:");
426 syslog(LOG_WARNING, "All received characters had %s", s);
432 * set_up_tty: Set up the serial port on `fd' for 8 bits, no parity,
433 * at the requested speed, etc. If `local' is true, set CLOCAL
434 * regardless of whether the modem option was specified.
436 * For *BSD, we assume that speed_t values numerically equal bits/second.
439 set_up_tty(fd, local)
444 if (tcgetattr(fd, &tios) < 0) {
445 syslog(LOG_ERR, "tcgetattr: %m");
451 ioctl(fd, TIOCGWINSZ, &wsinfo);
454 tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL);
455 if (crtscts > 0 && !local)
456 tios.c_cflag |= CRTSCTS;
457 else if (crtscts < 0)
458 tios.c_cflag &= ~CRTSCTS;
460 tios.c_cflag |= CS8 | CREAD | HUPCL;
462 tios.c_cflag |= CLOCAL;
463 tios.c_iflag = IGNBRK | IGNPAR;
467 tios.c_cc[VTIME] = 0;
470 tios.c_iflag |= IXON | IXOFF;
471 tios.c_cc[VSTOP] = 0x13; /* DC3 = XOFF = ^S */
472 tios.c_cc[VSTART] = 0x11; /* DC1 = XON = ^Q */
476 cfsetospeed(&tios, inspeed);
477 cfsetispeed(&tios, inspeed);
479 inspeed = cfgetospeed(&tios);
481 * We can't proceed if the serial port speed is 0,
482 * since that implies that the serial port is disabled.
485 syslog(LOG_ERR, "Baud rate for %s is 0; need explicit baud rate",
492 if (tcsetattr(fd, TCSAFLUSH, &tios) < 0) {
493 syslog(LOG_ERR, "tcsetattr: %m");
501 * restore_tty - restore the terminal to the saved settings.
508 if (!default_device) {
510 * Turn off echoing, because otherwise we can get into
511 * a loop with the tty and the modem echoing to each other.
512 * We presume we are the sole user of this tty device, so
513 * when we close it, it will revert to its defaults anyway.
515 inittermios.c_lflag &= ~(ECHO | ECHONL);
517 if (tcsetattr(fd, TCSAFLUSH, &inittermios) < 0)
519 syslog(LOG_WARNING, "tcsetattr: %m");
520 ioctl(fd, TIOCSWINSZ, &wsinfo);
526 * setdtr - control the DTR line on the serial port.
527 * This is called from die(), so it shouldn't call die().
533 int modembits = TIOCM_DTR;
535 ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits);
540 * open_ppp_loopback - open the device we use for getting
541 * packets in demand mode, and connect it to a ppp interface.
549 int pppdisc = PPPDISC;
551 if (openpty(&loop_master, &loop_slave, loop_name, NULL, NULL) < 0) {
552 syslog(LOG_ERR, "No free pty for loopback");
555 SYSDEBUG((LOG_DEBUG, "using %s for loopback", loop_name));
557 if (tcgetattr(loop_slave, &tios) == 0) {
558 tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB);
559 tios.c_cflag |= CS8 | CREAD;
560 tios.c_iflag = IGNPAR;
563 if (tcsetattr(loop_slave, TCSAFLUSH, &tios) < 0)
564 syslog(LOG_WARNING, "couldn't set attributes on loopback: %m");
567 if ((flags = fcntl(loop_master, F_GETFL)) != -1)
568 if (fcntl(loop_master, F_SETFL, flags | O_NONBLOCK) == -1)
569 syslog(LOG_WARNING, "couldn't set loopback to nonblock: %m");
572 if (ioctl(ppp_fd, TIOCSETD, &pppdisc) < 0) {
573 syslog(LOG_ERR, "ioctl(TIOCSETD): %m");
578 * Find out which interface we were given.
580 if (ioctl(ppp_fd, PPPIOCGUNIT, &ifunit) < 0) {
581 syslog(LOG_ERR, "ioctl(PPPIOCGUNIT): %m");
586 * Enable debug in the driver if requested.
589 if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &flags) < 0) {
590 syslog(LOG_WARNING, "ioctl (PPPIOCGFLAGS): %m");
592 flags |= (kdebugflag & 0xFF) * SC_DEBUG;
593 if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &flags) < 0)
594 syslog(LOG_WARNING, "ioctl(PPPIOCSFLAGS): %m");
602 * output - Output PPP packet.
611 log_packet(p, len, "sent ");
613 if (write(ttyfd, p, len) < 0) {
615 syslog(LOG_ERR, "write: %m");
621 * wait_input - wait until there is data available on ttyfd,
622 * for the length of time specified by *timo (indefinite
627 struct timeval *timo;
633 FD_SET(ttyfd, &ready);
634 n = select(ttyfd+1, &ready, NULL, &ready, timo);
635 if (n < 0 && errno != EINTR) {
636 syslog(LOG_ERR, "select: %m");
643 * wait_loop_output - wait until there is data available on the
644 * loopback, for the length of time specified by *timo (indefinite
647 wait_loop_output(timo)
648 struct timeval *timo;
654 FD_SET(loop_master, &ready);
655 n = select(loop_master + 1, &ready, NULL, &ready, timo);
656 if (n < 0 && errno != EINTR) {
657 syslog(LOG_ERR, "select: %m");
664 * wait_time - wait for a given length of time or until a
665 * signal is received.
668 struct timeval *timo;
672 n = select(0, NULL, NULL, NULL, timo);
673 if (n < 0 && errno != EINTR) {
674 syslog(LOG_ERR, "select: %m");
681 * read_packet - get a PPP packet from the serial device.
689 if ((len = read(ttyfd, buf, PPP_MTU + PPP_HDRLEN)) < 0) {
690 if (errno == EWOULDBLOCK || errno == EINTR)
692 syslog(LOG_ERR, "read: %m");
700 * get_loop_output - read characters from the loopback, form them
701 * into frames, and detect when we want to bring the real link up.
702 * Return value is 1 if we need to bring up the link, 0 otherwise.
710 while ((n = read(loop_master, inbuf, sizeof(inbuf))) >= 0) {
711 if (loop_chars(inbuf, n))
716 syslog(LOG_ERR, "eof on loopback");
718 } else if (errno != EWOULDBLOCK){
719 syslog(LOG_ERR, "read from loopback: %m");
728 * ppp_send_config - configure the transmit characteristics of
732 ppp_send_config(unit, mtu, asyncmap, pcomp, accomp)
740 strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
742 if (ioctl(sockfd, SIOCSIFMTU, (caddr_t) &ifr) < 0) {
743 syslog(LOG_ERR, "ioctl(SIOCSIFMTU): %m");
747 if (ioctl(ppp_fd, PPPIOCSASYNCMAP, (caddr_t) &asyncmap) < 0) {
748 syslog(LOG_ERR, "ioctl(PPPIOCSASYNCMAP): %m");
752 if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
753 syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m");
756 x = pcomp? x | SC_COMP_PROT: x &~ SC_COMP_PROT;
757 x = accomp? x | SC_COMP_AC: x &~ SC_COMP_AC;
758 if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
759 syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
766 * ppp_set_xaccm - set the extended transmit ACCM for the interface.
769 ppp_set_xaccm(unit, accm)
773 if (ioctl(ppp_fd, PPPIOCSXASYNCMAP, accm) < 0 && errno != ENOTTY)
774 syslog(LOG_WARNING, "ioctl(set extended ACCM): %m");
779 * ppp_recv_config - configure the receive-side characteristics of
783 ppp_recv_config(unit, mru, asyncmap, pcomp, accomp)
790 if (ioctl(ppp_fd, PPPIOCSMRU, (caddr_t) &mru) < 0) {
791 syslog(LOG_ERR, "ioctl(PPPIOCSMRU): %m");
794 if (ioctl(ppp_fd, PPPIOCSRASYNCMAP, (caddr_t) &asyncmap) < 0) {
795 syslog(LOG_ERR, "ioctl(PPPIOCSRASYNCMAP): %m");
798 if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
799 syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m");
802 x = !accomp? x | SC_REJ_COMP_AC: x &~ SC_REJ_COMP_AC;
803 if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
804 syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
810 * ccp_test - ask kernel whether a given compression method
811 * is acceptable for use. Returns 1 if the method and parameters
812 * are OK, 0 if the method is known but the parameters are not OK
813 * (e.g. code size should be reduced), or -1 if the method is unknown.
816 ccp_test(unit, opt_ptr, opt_len, for_transmit)
817 int unit, opt_len, for_transmit;
820 struct ppp_option_data data;
823 data.length = opt_len;
824 data.transmit = for_transmit;
825 if (ioctl(ttyfd, PPPIOCSCOMPRESS, (caddr_t) &data) >= 0)
827 return (errno == ENOBUFS)? 0: -1;
831 * ccp_flags_set - inform kernel about the current state of CCP.
834 ccp_flags_set(unit, isopen, isup)
835 int unit, isopen, isup;
839 if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
840 syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m");
843 x = isopen? x | SC_CCP_OPEN: x &~ SC_CCP_OPEN;
844 x = isup? x | SC_CCP_UP: x &~ SC_CCP_UP;
845 if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
846 syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
850 * ccp_fatal_error - returns 1 if decompression was disabled as a
851 * result of an error detected after decompression of a packet,
852 * 0 otherwise. This is necessary because of patent nonsense.
855 ccp_fatal_error(unit)
860 if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
861 syslog(LOG_ERR, "ioctl(PPPIOCGFLAGS): %m");
864 return x & SC_DC_FERROR;
868 * get_idle_time - return how long the link has been idle.
875 return ioctl(ppp_fd, PPPIOCGIDLE, ip) >= 0;
880 * sifvjcomp - config tcp header compression
883 sifvjcomp(u, vjcomp, cidcomp, maxcid)
884 int u, vjcomp, cidcomp, maxcid;
888 if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
889 syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m");
892 x = vjcomp ? x | SC_COMP_TCP: x &~ SC_COMP_TCP;
893 x = cidcomp? x & ~SC_NO_TCP_CCID: x | SC_NO_TCP_CCID;
894 if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
895 syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
898 if (ioctl(ppp_fd, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0) {
899 syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
906 * sifup - Config the interface up and enable IP packets to pass.
915 strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
916 if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
917 syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m");
920 ifr.ifr_flags |= IFF_UP;
921 if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
922 syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
926 npi.protocol = PPP_IP;
927 npi.mode = NPMODE_PASS;
928 if (ioctl(ppp_fd, PPPIOCSNPMODE, &npi) < 0) {
929 syslog(LOG_ERR, "ioctl(set IP mode to PASS): %m");
936 * sifnpmode - Set the mode for handling packets for a given NP.
939 sifnpmode(u, proto, mode)
946 npi.protocol = proto;
948 if (ioctl(ppp_fd, PPPIOCSNPMODE, &npi) < 0) {
949 syslog(LOG_ERR, "ioctl(set NP %d mode to %d): %m", proto, mode);
956 * sifdown - Config the interface down and disable IP.
967 npi.protocol = PPP_IP;
968 npi.mode = NPMODE_ERROR;
969 ioctl(ppp_fd, PPPIOCSNPMODE, (caddr_t) &npi);
970 /* ignore errors, because ppp_fd might have been closed by now. */
972 strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
973 if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
974 syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m");
977 ifr.ifr_flags &= ~IFF_UP;
978 if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
979 syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
988 * SET_SA_FAMILY - set the sa_family field of a struct sockaddr,
991 #define SET_SA_FAMILY(addr, family) \
992 BZERO((char *) &(addr), sizeof(addr)); \
993 addr.sa_family = (family); \
994 addr.sa_len = sizeof(addr);
997 * sifaddr - Config the interface IP addresses and netmask.
1004 struct ifaliasreq ifra;
1006 strncpy(ifra.ifra_name, ifname, sizeof(ifra.ifra_name));
1007 SET_SA_FAMILY(ifra.ifra_addr, AF_INET);
1008 ((struct sockaddr_in *) &ifra.ifra_addr)->sin_addr.s_addr = o;
1009 SET_SA_FAMILY(ifra.ifra_broadaddr, AF_INET);
1010 ((struct sockaddr_in *) &ifra.ifra_broadaddr)->sin_addr.s_addr = h;
1012 SET_SA_FAMILY(ifra.ifra_mask, AF_INET);
1013 ((struct sockaddr_in *) &ifra.ifra_mask)->sin_addr.s_addr = m;
1015 BZERO(&ifra.ifra_mask, sizeof(ifra.ifra_mask));
1016 if (ioctl(sockfd, SIOCAIFADDR, (caddr_t) &ifra) < 0) {
1017 if (errno != EEXIST) {
1018 syslog(LOG_ERR, "Couldn't set interface address: %m");
1022 "Couldn't set interface address: Address already exists");
1028 * cifaddr - Clear the interface IP addresses, and delete routes
1029 * through the interface if possible.
1036 struct ifaliasreq ifra;
1038 strncpy(ifra.ifra_name, ifname, sizeof(ifra.ifra_name));
1039 SET_SA_FAMILY(ifra.ifra_addr, AF_INET);
1040 ((struct sockaddr_in *) &ifra.ifra_addr)->sin_addr.s_addr = o;
1041 SET_SA_FAMILY(ifra.ifra_broadaddr, AF_INET);
1042 ((struct sockaddr_in *) &ifra.ifra_broadaddr)->sin_addr.s_addr = h;
1043 BZERO(&ifra.ifra_mask, sizeof(ifra.ifra_mask));
1044 if (ioctl(sockfd, SIOCDIFADDR, (caddr_t) &ifra) < 0) {
1045 if (errno != EADDRNOTAVAIL)
1046 syslog(LOG_WARNING, "Couldn't delete interface address: %m");
1053 * sifdefaultroute - assign a default route through the address given.
1056 sifdefaultroute(u, g)
1060 return dodefaultroute(g, 's');
1064 * cifdefaultroute - delete a default route through the address given.
1067 cifdefaultroute(u, g)
1071 return dodefaultroute(g, 'c');
1075 * dodefaultroute - talk to a routing socket to add/delete a default route.
1078 dodefaultroute(g, cmd)
1084 struct rt_msghdr hdr;
1085 struct sockaddr_in dst;
1086 struct sockaddr_in gway;
1087 struct sockaddr_in mask;
1090 if ((routes = socket(PF_ROUTE, SOCK_RAW, AF_INET)) < 0) {
1091 syslog(LOG_ERR, "Couldn't %s default route: socket: %m",
1092 cmd=='s'? "add": "delete");
1096 memset(&rtmsg, 0, sizeof(rtmsg));
1097 rtmsg.hdr.rtm_type = cmd == 's'? RTM_ADD: RTM_DELETE;
1098 rtmsg.hdr.rtm_flags = RTF_UP | RTF_GATEWAY;
1099 rtmsg.hdr.rtm_version = RTM_VERSION;
1100 rtmsg.hdr.rtm_seq = ++rtm_seq;
1101 rtmsg.hdr.rtm_addrs = RTA_DST | RTA_GATEWAY | RTA_NETMASK;
1102 rtmsg.dst.sin_len = sizeof(rtmsg.dst);
1103 rtmsg.dst.sin_family = AF_INET;
1104 rtmsg.gway.sin_len = sizeof(rtmsg.gway);
1105 rtmsg.gway.sin_family = AF_INET;
1106 rtmsg.gway.sin_addr.s_addr = g;
1107 rtmsg.mask.sin_len = sizeof(rtmsg.dst);
1108 rtmsg.mask.sin_family = AF_INET;
1110 rtmsg.hdr.rtm_msglen = sizeof(rtmsg);
1111 if (write(routes, &rtmsg, sizeof(rtmsg)) < 0) {
1112 syslog(LOG_ERR, "Couldn't %s default route: %m",
1113 cmd=='s'? "add": "delete");
1119 default_route_gateway = (cmd == 's')? g: 0;
1123 #if RTM_VERSION >= 3
1126 * sifproxyarp - Make a proxy ARP entry for the peer.
1129 struct rt_msghdr hdr;
1130 struct sockaddr_inarp dst;
1131 struct sockaddr_dl hwa;
1135 static int arpmsg_valid;
1138 sifproxyarp(unit, hisaddr)
1146 * Get the hardware address of an interface on the same subnet
1147 * as our local address.
1149 memset(&arpmsg, 0, sizeof(arpmsg));
1150 if (!get_ether_addr(hisaddr, &arpmsg.hwa)) {
1151 syslog(LOG_ERR, "Cannot determine ethernet address for proxy ARP");
1155 if ((routes = socket(PF_ROUTE, SOCK_RAW, AF_INET)) < 0) {
1156 syslog(LOG_ERR, "Couldn't add proxy arp entry: socket: %m");
1160 arpmsg.hdr.rtm_type = RTM_ADD;
1161 arpmsg.hdr.rtm_flags = RTF_ANNOUNCE | RTF_HOST | RTF_STATIC;
1162 arpmsg.hdr.rtm_version = RTM_VERSION;
1163 arpmsg.hdr.rtm_seq = ++rtm_seq;
1164 arpmsg.hdr.rtm_addrs = RTA_DST | RTA_GATEWAY;
1165 arpmsg.hdr.rtm_inits = RTV_EXPIRE;
1166 arpmsg.dst.sin_len = sizeof(struct sockaddr_inarp);
1167 arpmsg.dst.sin_family = AF_INET;
1168 arpmsg.dst.sin_addr.s_addr = hisaddr;
1169 arpmsg.dst.sin_other = SIN_PROXY;
1171 arpmsg.hdr.rtm_msglen = (char *) &arpmsg.hwa - (char *) &arpmsg
1172 + arpmsg.hwa.sdl_len;
1173 if (write(routes, &arpmsg, arpmsg.hdr.rtm_msglen) < 0) {
1174 syslog(LOG_ERR, "Couldn't add proxy arp entry: %m");
1181 proxy_arp_addr = hisaddr;
1186 * cifproxyarp - Delete the proxy ARP entry for the peer.
1189 cifproxyarp(unit, hisaddr)
1199 arpmsg.hdr.rtm_type = RTM_DELETE;
1200 arpmsg.hdr.rtm_seq = ++rtm_seq;
1202 if ((routes = socket(PF_ROUTE, SOCK_RAW, AF_INET)) < 0) {
1203 syslog(LOG_ERR, "Couldn't delete proxy arp entry: socket: %m");
1207 if (write(routes, &arpmsg, arpmsg.hdr.rtm_msglen) < 0) {
1208 syslog(LOG_ERR, "Couldn't delete proxy arp entry: %m");
1218 #else /* RTM_VERSION */
1221 * sifproxyarp - Make a proxy ARP entry for the peer.
1224 sifproxyarp(unit, hisaddr)
1228 struct arpreq arpreq;
1230 struct sockaddr_dl sdl;
1234 BZERO(&arpreq, sizeof(arpreq));
1237 * Get the hardware address of an interface on the same subnet
1238 * as our local address.
1240 if (!get_ether_addr(hisaddr, &dls.sdl)) {
1241 syslog(LOG_ERR, "Cannot determine ethernet address for proxy ARP");
1245 arpreq.arp_ha.sa_len = sizeof(struct sockaddr);
1246 arpreq.arp_ha.sa_family = AF_UNSPEC;
1247 BCOPY(LLADDR(&dls.sdl), arpreq.arp_ha.sa_data, dls.sdl.sdl_alen);
1248 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
1249 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
1250 arpreq.arp_flags = ATF_PERM | ATF_PUBL;
1251 if (ioctl(sockfd, SIOCSARP, (caddr_t)&arpreq) < 0) {
1252 syslog(LOG_ERR, "Couldn't add proxy arp entry: %m");
1256 proxy_arp_addr = hisaddr;
1261 * cifproxyarp - Delete the proxy ARP entry for the peer.
1264 cifproxyarp(unit, hisaddr)
1268 struct arpreq arpreq;
1270 BZERO(&arpreq, sizeof(arpreq));
1271 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
1272 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
1273 if (ioctl(sockfd, SIOCDARP, (caddr_t)&arpreq) < 0) {
1274 syslog(LOG_WARNING, "Couldn't delete proxy arp entry: %m");
1280 #endif /* RTM_VERSION */
1284 * get_ether_addr - get the hardware address of an interface on the
1285 * the same subnet as ipaddr.
1290 get_ether_addr(ipaddr, hwaddr)
1292 struct sockaddr_dl *hwaddr;
1294 struct ifreq *ifr, *ifend, *ifp;
1295 u_int32_t ina, mask;
1296 struct sockaddr_dl *dla;
1299 struct ifreq ifs[MAX_IFS];
1301 ifc.ifc_len = sizeof(ifs);
1303 if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1304 syslog(LOG_ERR, "ioctl(SIOCGIFCONF): %m");
1309 * Scan through looking for an interface with an Internet
1310 * address on the same subnet as `ipaddr'.
1312 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1313 for (ifr = ifc.ifc_req; ifr < ifend; ifr = (struct ifreq *)
1314 ((char *)&ifr->ifr_addr + ifr->ifr_addr.sa_len)) {
1315 if (ifr->ifr_addr.sa_family == AF_INET) {
1316 ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
1317 strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1319 * Check that the interface is up, and not point-to-point
1322 if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1324 if ((ifreq.ifr_flags &
1325 (IFF_UP|IFF_BROADCAST|IFF_POINTOPOINT|IFF_LOOPBACK|IFF_NOARP))
1326 != (IFF_UP|IFF_BROADCAST))
1329 * Get its netmask and check that it's on the right subnet.
1331 if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1333 mask = ((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr.s_addr;
1334 if ((ipaddr & mask) != (ina & mask))
1343 syslog(LOG_INFO, "found interface %s for proxy arp", ifr->ifr_name);
1346 * Now scan through again looking for a link-level address
1347 * for this interface.
1350 for (ifr = ifc.ifc_req; ifr < ifend; ) {
1351 if (strcmp(ifp->ifr_name, ifr->ifr_name) == 0
1352 && ifr->ifr_addr.sa_family == AF_LINK) {
1354 * Found the link-level address - copy it out
1356 dla = (struct sockaddr_dl *) &ifr->ifr_addr;
1357 BCOPY(dla, hwaddr, dla->sdl_len);
1360 ifr = (struct ifreq *) ((char *)&ifr->ifr_addr + ifr->ifr_addr.sa_len);
1367 * Return user specified netmask, modified by any mask we might determine
1368 * for address `addr' (in network byte order).
1369 * Here we scan through the system's list of interfaces, looking for
1370 * any non-point-to-point interfaces which might appear to be on the same
1371 * network as `addr'. If we find any, we OR in their netmask to the
1372 * user-specified netmask.
1378 u_int32_t mask, nmask, ina;
1379 struct ifreq *ifr, *ifend, ifreq;
1381 struct ifreq ifs[MAX_IFS];
1384 if (IN_CLASSA(addr)) /* determine network mask for address class */
1385 nmask = IN_CLASSA_NET;
1386 else if (IN_CLASSB(addr))
1387 nmask = IN_CLASSB_NET;
1389 nmask = IN_CLASSC_NET;
1390 /* class D nets are disallowed by bad_ip_adrs */
1391 mask = netmask | htonl(nmask);
1394 * Scan through the system's network interfaces.
1396 ifc.ifc_len = sizeof(ifs);
1398 if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1399 syslog(LOG_WARNING, "ioctl(SIOCGIFCONF): %m");
1402 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1403 for (ifr = ifc.ifc_req; ifr < ifend; ifr = (struct ifreq *)
1404 ((char *)&ifr->ifr_addr + ifr->ifr_addr.sa_len)) {
1406 * Check the interface's internet address.
1408 if (ifr->ifr_addr.sa_family != AF_INET)
1410 ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
1411 if ((ntohl(ina) & nmask) != (addr & nmask))
1414 * Check that the interface is up, and not point-to-point or loopback.
1416 strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1417 if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1419 if ((ifreq.ifr_flags & (IFF_UP|IFF_POINTOPOINT|IFF_LOOPBACK))
1423 * Get its netmask and OR it into our mask.
1425 if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1427 mask |= ((struct sockaddr_in *)&ifreq.ifr_addr)->sin_addr.s_addr;
1434 * lock - create a lock file for the named lock device
1436 #define LOCK_PREFIX "/var/spool/lock/LCK.."
1442 char hdb_lock_buffer[12];
1446 if ((p = strrchr(dev, '/')) != NULL)
1448 lock_file = malloc(strlen(LOCK_PREFIX) + strlen(dev) + 1);
1449 if (lock_file == NULL)
1450 novm("lock file name");
1451 strcat(strcpy(lock_file, LOCK_PREFIX), dev);
1453 while ((fd = open(lock_file, O_EXCL | O_CREAT | O_RDWR, 0644)) < 0) {
1455 && (fd = open(lock_file, O_RDONLY, 0)) >= 0) {
1456 /* Read the lock file to find out who has the device locked */
1457 n = read(fd, hdb_lock_buffer, 11);
1459 hdb_lock_buffer[n] = 0;
1460 pid = atoi(hdb_lock_buffer);
1463 syslog(LOG_ERR, "Can't read pid from lock file %s", lock_file);
1466 if (kill(pid, 0) == -1 && errno == ESRCH) {
1467 /* pid no longer exists - remove the lock file */
1468 if (unlink(lock_file) == 0) {
1470 syslog(LOG_NOTICE, "Removed stale lock on %s (pid %d)",
1474 syslog(LOG_WARNING, "Couldn't remove stale lock on %s",
1477 syslog(LOG_NOTICE, "Device %s is locked by pid %d",
1482 syslog(LOG_ERR, "Can't create lock file %s: %m", lock_file);
1488 sprintf(hdb_lock_buffer, "%10d\n", getpid());
1489 write(fd, hdb_lock_buffer, 11);
1496 * unlock - remove our lockfile