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.
6 * Copyright (c) 1995 The Australian National University.
9 * Redistribution and use in source and binary forms are permitted
10 * provided that the above copyright notice and this paragraph are
11 * duplicated in all such forms and that any documentation,
12 * advertising materials, and other materials related to such
13 * distribution and use acknowledge that the software was developed
14 * by Carnegie Mellon University and The Australian National University.
15 * The names of the Universities may not be used to endorse or promote
16 * products derived from this software without specific prior written
18 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
20 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
24 static char rcsid[] = "$Id: sys-bsd.c,v 1.28 1997/04/30 05:57:46 paulus Exp $";
40 #include <sys/ioctl.h>
41 #include <sys/types.h>
42 #include <sys/socket.h>
45 #include <sys/param.h>
54 #include <net/ppp_defs.h>
55 #include <net/if_ppp.h>
56 #include <net/route.h>
57 #include <net/if_dl.h>
58 #include <netinet/in.h>
61 #include <netinet/if_ether.h>
68 static int initdisc = -1; /* Initial TTY discipline for ppp_fd */
69 static int initfdflags = -1; /* Initial file descriptor flags for ppp_fd */
70 static int ppp_fd = -1; /* fd which is set to PPP discipline */
73 static int restore_term; /* 1 => we've munged the terminal */
74 static struct termios inittermios; /* Initial TTY termios */
75 static struct winsize wsinfo; /* Initial window size info */
77 static char *lock_file; /* name of lock file created */
79 static int loop_slave = -1;
80 static int loop_master;
81 static char loop_name[20];
83 static unsigned char inbuf[512]; /* buffer for chars read from loopback */
85 static int sockfd; /* socket for doing interface ioctls */
87 static int if_is_up; /* the interface is currently up */
88 static u_int32_t ifaddrs[2]; /* local and remote addresses we set */
89 static u_int32_t default_route_gateway; /* gateway addr for default route */
90 static u_int32_t proxy_arp_addr; /* remote addr for proxy arp */
92 /* Prototypes for procedures local to this file. */
93 static int dodefaultroute __P((u_int32_t, int));
94 static int get_ether_addr __P((u_int32_t, struct sockaddr_dl *));
98 * sys_init - System-dependent initialization.
103 /* Get an internet socket for doing socket ioctl's on. */
104 if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
105 syslog(LOG_ERR, "Couldn't create IP socket: %m");
111 * sys_cleanup - restore any system state we modified before exiting:
112 * mark the interface down, delete default route and/or proxy arp entry.
113 * This should call die() because it's called from die().
121 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
122 if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) >= 0
123 && ((ifr.ifr_flags & IFF_UP) != 0)) {
124 ifr.ifr_flags &= ~IFF_UP;
125 ioctl(sockfd, SIOCSIFFLAGS, &ifr);
129 cifaddr(0, ifaddrs[0], ifaddrs[1]);
130 if (default_route_gateway)
131 cifdefaultroute(0, 0, default_route_gateway);
133 cifproxyarp(0, proxy_arp_addr);
137 * sys_close - Clean up in a child process before execing.
143 if (loop_slave >= 0) {
150 * sys_check_options - check the options that the user specified
158 * ppp_available - check whether the system has any ppp interfaces
159 * (in fact we check whether we can do an ioctl on ppp0).
166 extern char *no_ppp_msg;
168 if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
169 return 1; /* can't tell */
171 strncpy(ifr.ifr_name, "ppp0", sizeof (ifr.ifr_name));
172 ok = ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) >= 0;
176 This system lacks kernel support for PPP. To include PPP support\n\
177 in the kernel, please follow the steps detailed in the README.bsd\n\
178 file in the ppp-2.2 distribution.\n";
183 * establish_ppp - Turn the serial port into a ppp interface.
189 int pppdisc = PPPDISC;
194 * Demand mode - prime the old ppp device to relinquish the unit.
196 if (ioctl(ppp_fd, PPPIOCXFERUNIT, 0) < 0) {
197 syslog(LOG_ERR, "ioctl(transfer ppp unit): %m");
203 * Save the old line discipline of fd, and set it to PPP.
205 if (ioctl(fd, TIOCGETD, &initdisc) < 0) {
206 syslog(LOG_ERR, "ioctl(TIOCGETD): %m");
209 if (ioctl(fd, TIOCSETD, &pppdisc) < 0) {
210 syslog(LOG_ERR, "ioctl(TIOCSETD): %m");
216 * Find out which interface we were given.
218 if (ioctl(fd, PPPIOCGUNIT, &ifunit) < 0) {
219 syslog(LOG_ERR, "ioctl(PPPIOCGUNIT): %m");
224 * Check that we got the same unit again.
226 if (ioctl(fd, PPPIOCGUNIT, &x) < 0) {
227 syslog(LOG_ERR, "ioctl(PPPIOCGUNIT): %m");
231 syslog(LOG_ERR, "transfer_ppp failed: wanted unit %d, got %d",
236 ioctl(loop_slave, TIOCSETD, &x);
242 * Enable debug in the driver if requested.
245 if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
246 syslog(LOG_WARNING, "ioctl (PPPIOCGFLAGS): %m");
248 x |= (kdebugflag & 0xFF) * SC_DEBUG;
249 if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
250 syslog(LOG_WARNING, "ioctl(PPPIOCSFLAGS): %m");
255 * Set device for non-blocking reads.
257 if ((initfdflags = fcntl(fd, F_GETFL)) == -1
258 || fcntl(fd, F_SETFL, initfdflags | O_NONBLOCK) == -1) {
259 syslog(LOG_WARNING, "Couldn't set device to non-blocking mode: %m");
264 * restore_loop - reattach the ppp unit to the loopback.
272 * Transfer the ppp interface back to the loopback.
274 if (ioctl(ppp_fd, PPPIOCXFERUNIT, 0) < 0) {
275 syslog(LOG_ERR, "ioctl(transfer ppp unit): %m");
279 if (ioctl(loop_slave, TIOCSETD, &x) < 0) {
280 syslog(LOG_ERR, "ioctl(TIOCSETD): %m");
285 * Check that we got the same unit again.
287 if (ioctl(loop_slave, PPPIOCGUNIT, &x) < 0) {
288 syslog(LOG_ERR, "ioctl(PPPIOCGUNIT): %m");
292 syslog(LOG_ERR, "transfer_ppp failed: wanted unit %d, got %d",
301 * disestablish_ppp - Restore the serial port to normal operation.
302 * This shouldn't call die() because it's called from die().
308 /* Reset non-blocking mode on fd. */
309 if (initfdflags != -1 && fcntl(fd, F_SETFL, initfdflags) < 0)
310 syslog(LOG_WARNING, "Couldn't restore device fd flags: %m");
313 /* Restore old line discipline. */
314 if (initdisc >= 0 && ioctl(fd, TIOCSETD, &initdisc) < 0)
315 syslog(LOG_ERR, "ioctl(TIOCSETD): %m");
323 * Check whether the link seems not to be 8-bit clean.
331 if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) == 0) {
333 switch (~x & (SC_RCV_B7_0|SC_RCV_B7_1|SC_RCV_EVNP|SC_RCV_ODDP)) {
335 s = "bit 7 set to 1";
338 s = "bit 7 set to 0";
348 syslog(LOG_WARNING, "Serial link is not 8-bit clean:");
349 syslog(LOG_WARNING, "All received characters had %s", s);
355 * set_up_tty: Set up the serial port on `fd' for 8 bits, no parity,
356 * at the requested speed, etc. If `local' is true, set CLOCAL
357 * regardless of whether the modem option was specified.
359 * For *BSD, we assume that speed_t values numerically equal bits/second.
362 set_up_tty(fd, local)
367 if (tcgetattr(fd, &tios) < 0) {
368 syslog(LOG_ERR, "tcgetattr: %m");
374 ioctl(fd, TIOCGWINSZ, &wsinfo);
377 tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL);
378 if (crtscts > 0 && !local)
379 tios.c_cflag |= CRTSCTS;
380 else if (crtscts < 0)
381 tios.c_cflag &= ~CRTSCTS;
383 tios.c_cflag |= CS8 | CREAD | HUPCL;
385 tios.c_cflag |= CLOCAL;
386 tios.c_iflag = IGNBRK | IGNPAR;
390 tios.c_cc[VTIME] = 0;
393 tios.c_iflag |= IXON | IXOFF;
394 tios.c_cc[VSTOP] = 0x13; /* DC3 = XOFF = ^S */
395 tios.c_cc[VSTART] = 0x11; /* DC1 = XON = ^Q */
399 cfsetospeed(&tios, inspeed);
400 cfsetispeed(&tios, inspeed);
402 inspeed = cfgetospeed(&tios);
404 * We can't proceed if the serial port speed is 0,
405 * since that implies that the serial port is disabled.
408 syslog(LOG_ERR, "Baud rate for %s is 0; need explicit baud rate",
415 if (tcsetattr(fd, TCSAFLUSH, &tios) < 0) {
416 syslog(LOG_ERR, "tcsetattr: %m");
424 * restore_tty - restore the terminal to the saved settings.
431 if (!default_device) {
433 * Turn off echoing, because otherwise we can get into
434 * a loop with the tty and the modem echoing to each other.
435 * We presume we are the sole user of this tty device, so
436 * when we close it, it will revert to its defaults anyway.
438 inittermios.c_lflag &= ~(ECHO | ECHONL);
440 if (tcsetattr(fd, TCSAFLUSH, &inittermios) < 0)
442 syslog(LOG_WARNING, "tcsetattr: %m");
443 ioctl(fd, TIOCSWINSZ, &wsinfo);
449 * setdtr - control the DTR line on the serial port.
450 * This is called from die(), so it shouldn't call die().
456 int modembits = TIOCM_DTR;
458 ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits);
463 * open_ppp_loopback - open the device we use for getting
464 * packets in demand mode, and connect it to a ppp interface.
472 int pppdisc = PPPDISC;
474 if (openpty(&loop_master, &loop_slave, loop_name, NULL, NULL) < 0) {
475 syslog(LOG_ERR, "No free pty for loopback");
478 SYSDEBUG((LOG_DEBUG, "using %s for loopback", loop_name));
480 if (tcgetattr(loop_slave, &tios) == 0) {
481 tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB);
482 tios.c_cflag |= CS8 | CREAD;
483 tios.c_iflag = IGNPAR;
486 if (tcsetattr(loop_slave, TCSAFLUSH, &tios) < 0)
487 syslog(LOG_WARNING, "couldn't set attributes on loopback: %m");
490 if ((flags = fcntl(loop_master, F_GETFL)) != -1)
491 if (fcntl(loop_master, F_SETFL, flags | O_NONBLOCK) == -1)
492 syslog(LOG_WARNING, "couldn't set loopback to nonblock: %m");
495 if (ioctl(ppp_fd, TIOCSETD, &pppdisc) < 0) {
496 syslog(LOG_ERR, "ioctl(TIOCSETD): %m");
501 * Find out which interface we were given.
503 if (ioctl(ppp_fd, PPPIOCGUNIT, &ifunit) < 0) {
504 syslog(LOG_ERR, "ioctl(PPPIOCGUNIT): %m");
509 * Enable debug in the driver if requested.
512 if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &flags) < 0) {
513 syslog(LOG_WARNING, "ioctl (PPPIOCGFLAGS): %m");
515 flags |= (kdebugflag & 0xFF) * SC_DEBUG;
516 if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &flags) < 0)
517 syslog(LOG_WARNING, "ioctl(PPPIOCSFLAGS): %m");
525 * output - Output PPP packet.
534 log_packet(p, len, "sent ", LOG_DEBUG);
536 if (write(ttyfd, p, len) < 0) {
538 syslog(LOG_ERR, "write: %m");
544 * wait_input - wait until there is data available on ttyfd,
545 * for the length of time specified by *timo (indefinite
550 struct timeval *timo;
556 FD_SET(ttyfd, &ready);
557 n = select(ttyfd+1, &ready, NULL, &ready, timo);
558 if (n < 0 && errno != EINTR) {
559 syslog(LOG_ERR, "select: %m");
566 * wait_loop_output - wait until there is data available on the
567 * loopback, for the length of time specified by *timo (indefinite
571 wait_loop_output(timo)
572 struct timeval *timo;
578 FD_SET(loop_master, &ready);
579 n = select(loop_master + 1, &ready, NULL, &ready, timo);
580 if (n < 0 && errno != EINTR) {
581 syslog(LOG_ERR, "select: %m");
588 * wait_time - wait for a given length of time or until a
589 * signal is received.
593 struct timeval *timo;
597 n = select(0, NULL, NULL, NULL, timo);
598 if (n < 0 && errno != EINTR) {
599 syslog(LOG_ERR, "select: %m");
606 * read_packet - get a PPP packet from the serial device.
614 if ((len = read(ttyfd, buf, PPP_MTU + PPP_HDRLEN)) < 0) {
615 if (errno == EWOULDBLOCK || errno == EINTR)
617 syslog(LOG_ERR, "read: %m");
625 * get_loop_output - read characters from the loopback, form them
626 * into frames, and detect when we want to bring the real link up.
627 * Return value is 1 if we need to bring up the link, 0 otherwise.
635 while ((n = read(loop_master, inbuf, sizeof(inbuf))) >= 0) {
636 if (loop_chars(inbuf, n))
641 syslog(LOG_ERR, "eof on loopback");
643 } else if (errno != EWOULDBLOCK){
644 syslog(LOG_ERR, "read from loopback: %m");
653 * ppp_send_config - configure the transmit characteristics of
657 ppp_send_config(unit, mtu, asyncmap, pcomp, accomp)
665 strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
667 if (ioctl(sockfd, SIOCSIFMTU, (caddr_t) &ifr) < 0) {
668 syslog(LOG_ERR, "ioctl(SIOCSIFMTU): %m");
672 if (ioctl(ppp_fd, PPPIOCSASYNCMAP, (caddr_t) &asyncmap) < 0) {
673 syslog(LOG_ERR, "ioctl(PPPIOCSASYNCMAP): %m");
677 if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
678 syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m");
681 x = pcomp? x | SC_COMP_PROT: x &~ SC_COMP_PROT;
682 x = accomp? x | SC_COMP_AC: x &~ SC_COMP_AC;
683 if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
684 syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
691 * ppp_set_xaccm - set the extended transmit ACCM for the interface.
694 ppp_set_xaccm(unit, accm)
698 if (ioctl(ppp_fd, PPPIOCSXASYNCMAP, accm) < 0 && errno != ENOTTY)
699 syslog(LOG_WARNING, "ioctl(set extended ACCM): %m");
704 * ppp_recv_config - configure the receive-side characteristics of
708 ppp_recv_config(unit, mru, asyncmap, pcomp, accomp)
715 if (ioctl(ppp_fd, PPPIOCSMRU, (caddr_t) &mru) < 0) {
716 syslog(LOG_ERR, "ioctl(PPPIOCSMRU): %m");
719 if (ioctl(ppp_fd, PPPIOCSRASYNCMAP, (caddr_t) &asyncmap) < 0) {
720 syslog(LOG_ERR, "ioctl(PPPIOCSRASYNCMAP): %m");
723 if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
724 syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m");
727 x = !accomp? x | SC_REJ_COMP_AC: x &~ SC_REJ_COMP_AC;
728 if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
729 syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
735 * ccp_test - ask kernel whether a given compression method
736 * is acceptable for use. Returns 1 if the method and parameters
737 * are OK, 0 if the method is known but the parameters are not OK
738 * (e.g. code size should be reduced), or -1 if the method is unknown.
741 ccp_test(unit, opt_ptr, opt_len, for_transmit)
742 int unit, opt_len, for_transmit;
745 struct ppp_option_data data;
748 data.length = opt_len;
749 data.transmit = for_transmit;
750 if (ioctl(ttyfd, PPPIOCSCOMPRESS, (caddr_t) &data) >= 0)
752 return (errno == ENOBUFS)? 0: -1;
756 * ccp_flags_set - inform kernel about the current state of CCP.
759 ccp_flags_set(unit, isopen, isup)
760 int unit, isopen, isup;
764 if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
765 syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m");
768 x = isopen? x | SC_CCP_OPEN: x &~ SC_CCP_OPEN;
769 x = isup? x | SC_CCP_UP: x &~ SC_CCP_UP;
770 if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
771 syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
775 * ccp_fatal_error - returns 1 if decompression was disabled as a
776 * result of an error detected after decompression of a packet,
777 * 0 otherwise. This is necessary because of patent nonsense.
780 ccp_fatal_error(unit)
785 if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
786 syslog(LOG_ERR, "ioctl(PPPIOCGFLAGS): %m");
789 return x & SC_DC_FERROR;
793 * get_idle_time - return how long the link has been idle.
800 return ioctl(ppp_fd, PPPIOCGIDLE, ip) >= 0;
806 * set_filters - transfer the pass and active filters to the kernel.
809 set_filters(pass, active)
810 struct bpf_program *pass, *active;
814 if (pass->bf_len > 0) {
815 if (ioctl(ppp_fd, PPPIOCSPASS, pass) < 0) {
816 syslog(LOG_ERR, "Couldn't set pass-filter in kernel: %m");
820 if (active->bf_len > 0) {
821 if (ioctl(ppp_fd, PPPIOCSACTIVE, active) < 0) {
822 syslog(LOG_ERR, "Couldn't set active-filter in kernel: %m");
831 * sifvjcomp - config tcp header compression
834 sifvjcomp(u, vjcomp, cidcomp, maxcid)
835 int u, vjcomp, cidcomp, maxcid;
839 if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
840 syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m");
843 x = vjcomp ? x | SC_COMP_TCP: x &~ SC_COMP_TCP;
844 x = cidcomp? x & ~SC_NO_TCP_CCID: x | SC_NO_TCP_CCID;
845 if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
846 syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
849 if (vjcomp && ioctl(ppp_fd, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0) {
850 syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
857 * sifup - Config the interface up and enable IP packets to pass.
865 strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
866 if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
867 syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m");
870 ifr.ifr_flags |= IFF_UP;
871 if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
872 syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
880 * sifnpmode - Set the mode for handling packets for a given NP.
883 sifnpmode(u, proto, mode)
890 npi.protocol = proto;
892 if (ioctl(ppp_fd, PPPIOCSNPMODE, &npi) < 0) {
893 syslog(LOG_ERR, "ioctl(set NP %d mode to %d): %m", proto, mode);
900 * sifdown - Config the interface down and disable IP.
911 npi.protocol = PPP_IP;
912 npi.mode = NPMODE_ERROR;
913 ioctl(ppp_fd, PPPIOCSNPMODE, (caddr_t) &npi);
914 /* ignore errors, because ppp_fd might have been closed by now. */
916 strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
917 if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
918 syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m");
921 ifr.ifr_flags &= ~IFF_UP;
922 if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
923 syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
932 * SET_SA_FAMILY - set the sa_family field of a struct sockaddr,
935 #define SET_SA_FAMILY(addr, family) \
936 BZERO((char *) &(addr), sizeof(addr)); \
937 addr.sa_family = (family); \
938 addr.sa_len = sizeof(addr);
941 * sifaddr - Config the interface IP addresses and netmask.
948 struct ifaliasreq ifra;
950 strncpy(ifra.ifra_name, ifname, sizeof(ifra.ifra_name));
951 SET_SA_FAMILY(ifra.ifra_addr, AF_INET);
952 ((struct sockaddr_in *) &ifra.ifra_addr)->sin_addr.s_addr = o;
953 SET_SA_FAMILY(ifra.ifra_broadaddr, AF_INET);
954 ((struct sockaddr_in *) &ifra.ifra_broadaddr)->sin_addr.s_addr = h;
956 SET_SA_FAMILY(ifra.ifra_mask, AF_INET);
957 ((struct sockaddr_in *) &ifra.ifra_mask)->sin_addr.s_addr = m;
959 BZERO(&ifra.ifra_mask, sizeof(ifra.ifra_mask));
960 if (ioctl(sockfd, SIOCAIFADDR, (caddr_t) &ifra) < 0) {
961 if (errno != EEXIST) {
962 syslog(LOG_ERR, "Couldn't set interface address: %m");
966 "Couldn't set interface address: Address %s already exists",
975 * cifaddr - Clear the interface IP addresses, and delete routes
976 * through the interface if possible.
983 struct ifaliasreq ifra;
986 strncpy(ifra.ifra_name, ifname, sizeof(ifra.ifra_name));
987 SET_SA_FAMILY(ifra.ifra_addr, AF_INET);
988 ((struct sockaddr_in *) &ifra.ifra_addr)->sin_addr.s_addr = o;
989 SET_SA_FAMILY(ifra.ifra_broadaddr, AF_INET);
990 ((struct sockaddr_in *) &ifra.ifra_broadaddr)->sin_addr.s_addr = h;
991 BZERO(&ifra.ifra_mask, sizeof(ifra.ifra_mask));
992 if (ioctl(sockfd, SIOCDIFADDR, (caddr_t) &ifra) < 0) {
993 if (errno != EADDRNOTAVAIL)
994 syslog(LOG_WARNING, "Couldn't delete interface address: %m");
1001 * sifdefaultroute - assign a default route through the address given.
1004 sifdefaultroute(u, l, g)
1008 return dodefaultroute(g, 's');
1012 * cifdefaultroute - delete a default route through the address given.
1015 cifdefaultroute(u, l, g)
1019 return dodefaultroute(g, 'c');
1023 * dodefaultroute - talk to a routing socket to add/delete a default route.
1026 dodefaultroute(g, cmd)
1032 struct rt_msghdr hdr;
1033 struct sockaddr_in dst;
1034 struct sockaddr_in gway;
1035 struct sockaddr_in mask;
1038 if ((routes = socket(PF_ROUTE, SOCK_RAW, AF_INET)) < 0) {
1039 syslog(LOG_ERR, "Couldn't %s default route: socket: %m",
1040 cmd=='s'? "add": "delete");
1044 memset(&rtmsg, 0, sizeof(rtmsg));
1045 rtmsg.hdr.rtm_type = cmd == 's'? RTM_ADD: RTM_DELETE;
1046 rtmsg.hdr.rtm_flags = RTF_UP | RTF_GATEWAY;
1047 rtmsg.hdr.rtm_version = RTM_VERSION;
1048 rtmsg.hdr.rtm_seq = ++rtm_seq;
1049 rtmsg.hdr.rtm_addrs = RTA_DST | RTA_GATEWAY | RTA_NETMASK;
1050 rtmsg.dst.sin_len = sizeof(rtmsg.dst);
1051 rtmsg.dst.sin_family = AF_INET;
1052 rtmsg.gway.sin_len = sizeof(rtmsg.gway);
1053 rtmsg.gway.sin_family = AF_INET;
1054 rtmsg.gway.sin_addr.s_addr = g;
1055 rtmsg.mask.sin_len = sizeof(rtmsg.dst);
1056 rtmsg.mask.sin_family = AF_INET;
1058 rtmsg.hdr.rtm_msglen = sizeof(rtmsg);
1059 if (write(routes, &rtmsg, sizeof(rtmsg)) < 0) {
1060 syslog(LOG_ERR, "Couldn't %s default route: %m",
1061 cmd=='s'? "add": "delete");
1067 default_route_gateway = (cmd == 's')? g: 0;
1071 #if RTM_VERSION >= 3
1074 * sifproxyarp - Make a proxy ARP entry for the peer.
1077 struct rt_msghdr hdr;
1078 struct sockaddr_inarp dst;
1079 struct sockaddr_dl hwa;
1083 static int arpmsg_valid;
1086 sifproxyarp(unit, hisaddr)
1093 * Get the hardware address of an interface on the same subnet
1094 * as our local address.
1096 memset(&arpmsg, 0, sizeof(arpmsg));
1097 if (!get_ether_addr(hisaddr, &arpmsg.hwa)) {
1098 syslog(LOG_ERR, "Cannot determine ethernet address for proxy ARP");
1102 if ((routes = socket(PF_ROUTE, SOCK_RAW, AF_INET)) < 0) {
1103 syslog(LOG_ERR, "Couldn't add proxy arp entry: socket: %m");
1107 arpmsg.hdr.rtm_type = RTM_ADD;
1108 arpmsg.hdr.rtm_flags = RTF_ANNOUNCE | RTF_HOST | RTF_STATIC;
1109 arpmsg.hdr.rtm_version = RTM_VERSION;
1110 arpmsg.hdr.rtm_seq = ++rtm_seq;
1111 arpmsg.hdr.rtm_addrs = RTA_DST | RTA_GATEWAY;
1112 arpmsg.hdr.rtm_inits = RTV_EXPIRE;
1113 arpmsg.dst.sin_len = sizeof(struct sockaddr_inarp);
1114 arpmsg.dst.sin_family = AF_INET;
1115 arpmsg.dst.sin_addr.s_addr = hisaddr;
1116 arpmsg.dst.sin_other = SIN_PROXY;
1118 arpmsg.hdr.rtm_msglen = (char *) &arpmsg.hwa - (char *) &arpmsg
1119 + arpmsg.hwa.sdl_len;
1120 if (write(routes, &arpmsg, arpmsg.hdr.rtm_msglen) < 0) {
1121 syslog(LOG_ERR, "Couldn't add proxy arp entry: %m");
1128 proxy_arp_addr = hisaddr;
1133 * cifproxyarp - Delete the proxy ARP entry for the peer.
1136 cifproxyarp(unit, hisaddr)
1146 arpmsg.hdr.rtm_type = RTM_DELETE;
1147 arpmsg.hdr.rtm_seq = ++rtm_seq;
1149 if ((routes = socket(PF_ROUTE, SOCK_RAW, AF_INET)) < 0) {
1150 syslog(LOG_ERR, "Couldn't delete proxy arp entry: socket: %m");
1154 if (write(routes, &arpmsg, arpmsg.hdr.rtm_msglen) < 0) {
1155 syslog(LOG_ERR, "Couldn't delete proxy arp entry: %m");
1165 #else /* RTM_VERSION */
1168 * sifproxyarp - Make a proxy ARP entry for the peer.
1171 sifproxyarp(unit, hisaddr)
1175 struct arpreq arpreq;
1177 struct sockaddr_dl sdl;
1181 BZERO(&arpreq, sizeof(arpreq));
1184 * Get the hardware address of an interface on the same subnet
1185 * as our local address.
1187 if (!get_ether_addr(hisaddr, &dls.sdl)) {
1188 syslog(LOG_ERR, "Cannot determine ethernet address for proxy ARP");
1192 arpreq.arp_ha.sa_len = sizeof(struct sockaddr);
1193 arpreq.arp_ha.sa_family = AF_UNSPEC;
1194 BCOPY(LLADDR(&dls.sdl), arpreq.arp_ha.sa_data, dls.sdl.sdl_alen);
1195 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
1196 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
1197 arpreq.arp_flags = ATF_PERM | ATF_PUBL;
1198 if (ioctl(sockfd, SIOCSARP, (caddr_t)&arpreq) < 0) {
1199 syslog(LOG_ERR, "Couldn't add proxy arp entry: %m");
1203 proxy_arp_addr = hisaddr;
1208 * cifproxyarp - Delete the proxy ARP entry for the peer.
1211 cifproxyarp(unit, hisaddr)
1215 struct arpreq arpreq;
1217 BZERO(&arpreq, sizeof(arpreq));
1218 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
1219 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
1220 if (ioctl(sockfd, SIOCDARP, (caddr_t)&arpreq) < 0) {
1221 syslog(LOG_WARNING, "Couldn't delete proxy arp entry: %m");
1227 #endif /* RTM_VERSION */
1231 * get_ether_addr - get the hardware address of an interface on the
1232 * the same subnet as ipaddr.
1237 get_ether_addr(ipaddr, hwaddr)
1239 struct sockaddr_dl *hwaddr;
1241 struct ifreq *ifr, *ifend, *ifp;
1242 u_int32_t ina, mask;
1243 struct sockaddr_dl *dla;
1246 struct ifreq ifs[MAX_IFS];
1248 ifc.ifc_len = sizeof(ifs);
1250 if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1251 syslog(LOG_ERR, "ioctl(SIOCGIFCONF): %m");
1256 * Scan through looking for an interface with an Internet
1257 * address on the same subnet as `ipaddr'.
1259 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1260 for (ifr = ifc.ifc_req; ifr < ifend; ifr = (struct ifreq *)
1261 ((char *)&ifr->ifr_addr + ifr->ifr_addr.sa_len)) {
1262 if (ifr->ifr_addr.sa_family == AF_INET) {
1263 ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
1264 strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1266 * Check that the interface is up, and not point-to-point
1269 if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1271 if ((ifreq.ifr_flags &
1272 (IFF_UP|IFF_BROADCAST|IFF_POINTOPOINT|IFF_LOOPBACK|IFF_NOARP))
1273 != (IFF_UP|IFF_BROADCAST))
1276 * Get its netmask and check that it's on the right subnet.
1278 if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1280 mask = ((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr.s_addr;
1281 if ((ipaddr & mask) != (ina & mask))
1290 syslog(LOG_INFO, "found interface %s for proxy arp", ifr->ifr_name);
1293 * Now scan through again looking for a link-level address
1294 * for this interface.
1297 for (ifr = ifc.ifc_req; ifr < ifend; ) {
1298 if (strcmp(ifp->ifr_name, ifr->ifr_name) == 0
1299 && ifr->ifr_addr.sa_family == AF_LINK) {
1301 * Found the link-level address - copy it out
1303 dla = (struct sockaddr_dl *) &ifr->ifr_addr;
1304 BCOPY(dla, hwaddr, dla->sdl_len);
1307 ifr = (struct ifreq *) ((char *)&ifr->ifr_addr + ifr->ifr_addr.sa_len);
1314 * Return user specified netmask, modified by any mask we might determine
1315 * for address `addr' (in network byte order).
1316 * Here we scan through the system's list of interfaces, looking for
1317 * any non-point-to-point interfaces which might appear to be on the same
1318 * network as `addr'. If we find any, we OR in their netmask to the
1319 * user-specified netmask.
1325 u_int32_t mask, nmask, ina;
1326 struct ifreq *ifr, *ifend, ifreq;
1328 struct ifreq ifs[MAX_IFS];
1331 if (IN_CLASSA(addr)) /* determine network mask for address class */
1332 nmask = IN_CLASSA_NET;
1333 else if (IN_CLASSB(addr))
1334 nmask = IN_CLASSB_NET;
1336 nmask = IN_CLASSC_NET;
1337 /* class D nets are disallowed by bad_ip_adrs */
1338 mask = netmask | htonl(nmask);
1341 * Scan through the system's network interfaces.
1343 ifc.ifc_len = sizeof(ifs);
1345 if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1346 syslog(LOG_WARNING, "ioctl(SIOCGIFCONF): %m");
1349 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1350 for (ifr = ifc.ifc_req; ifr < ifend; ifr = (struct ifreq *)
1351 ((char *)&ifr->ifr_addr + ifr->ifr_addr.sa_len)) {
1353 * Check the interface's internet address.
1355 if (ifr->ifr_addr.sa_family != AF_INET)
1357 ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
1358 if ((ntohl(ina) & nmask) != (addr & nmask))
1361 * Check that the interface is up, and not point-to-point or loopback.
1363 strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1364 if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1366 if ((ifreq.ifr_flags & (IFF_UP|IFF_POINTOPOINT|IFF_LOOPBACK))
1370 * Get its netmask and OR it into our mask.
1372 if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1374 mask |= ((struct sockaddr_in *)&ifreq.ifr_addr)->sin_addr.s_addr;
1381 * lock - create a lock file for the named lock device
1383 #define LOCK_PREFIX "/var/spool/lock/LCK.."
1389 char hdb_lock_buffer[12];
1393 if ((p = strrchr(dev, '/')) != NULL)
1395 lock_file = malloc(strlen(LOCK_PREFIX) + strlen(dev) + 1);
1396 if (lock_file == NULL)
1397 novm("lock file name");
1398 strcat(strcpy(lock_file, LOCK_PREFIX), dev);
1400 while ((fd = open(lock_file, O_EXCL | O_CREAT | O_RDWR, 0644)) < 0) {
1402 && (fd = open(lock_file, O_RDONLY, 0)) >= 0) {
1403 /* Read the lock file to find out who has the device locked */
1404 n = read(fd, hdb_lock_buffer, 11);
1406 syslog(LOG_ERR, "Can't read pid from lock file %s", lock_file);
1409 hdb_lock_buffer[n] = 0;
1410 pid = atoi(hdb_lock_buffer);
1411 if (kill(pid, 0) == -1 && errno == ESRCH) {
1412 /* pid no longer exists - remove the lock file */
1413 if (unlink(lock_file) == 0) {
1415 syslog(LOG_NOTICE, "Removed stale lock on %s (pid %d)",
1419 syslog(LOG_WARNING, "Couldn't remove stale lock on %s",
1422 syslog(LOG_NOTICE, "Device %s is locked by pid %d",
1427 syslog(LOG_ERR, "Can't create lock file %s: %m", lock_file);
1433 sprintf(hdb_lock_buffer, "%10d\n", getpid());
1434 write(fd, hdb_lock_buffer, 11);
1441 * unlock - remove our lockfile