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.
22 * $FreeBSD: src/usr.sbin/pppd/sys-bsd.c,v 1.17.2.1 2002/09/17 16:53:55 nectar Exp $
23 * $DragonFly: src/usr.sbin/pppd/sys-bsd.c,v 1.5 2004/02/03 07:11:53 dillon Exp $
26 /* $NetBSD: sys-bsd.c,v 1.1.1.3 1997/09/26 18:53:04 christos Exp $ */
41 #include <sys/ioctl.h>
42 #include <sys/types.h>
43 #include <sys/socket.h>
46 #include <sys/param.h>
55 #include <net/ppp_layer/ppp_defs.h>
56 #include <net/ppp/if_ppp.h>
57 #include <net/route.h>
58 #include <net/if_dl.h>
59 #include <netinet/in.h>
62 #include <netipx/ipx.h>
66 #include <sys/param.h>
67 #if defined(NetBSD) && (NetBSD >= 199703)
68 #include <netinet/if_inarp.h>
69 #else /* NetBSD 1.2D or later */
71 #include <netinet/if_ether.h>
73 #include <net/if_ether.h>
82 static int initdisc = -1; /* Initial TTY discipline for ppp_fd */
83 static int initfdflags = -1; /* Initial file descriptor flags for ppp_fd */
84 static int ppp_fd = -1; /* fd which is set to PPP discipline */
87 static int restore_term; /* 1 => we've munged the terminal */
88 static struct termios inittermios; /* Initial TTY termios */
89 static struct winsize wsinfo; /* Initial window size info */
91 static char *lock_file; /* name of lock file created */
93 static int loop_slave = -1;
94 static int loop_master;
95 static char loop_name[20];
97 static unsigned char inbuf[512]; /* buffer for chars read from loopback */
99 static int sockfd; /* socket for doing interface ioctls */
101 static int if_is_up; /* the interface is currently up */
102 static u_int32_t ifaddrs[2]; /* local and remote addresses we set */
103 static u_int32_t default_route_gateway; /* gateway addr for default route */
104 static u_int32_t proxy_arp_addr; /* remote addr for proxy arp */
106 /* Prototypes for procedures local to this file. */
107 static int dodefaultroute(u_int32_t, int);
108 static int get_ether_addr(u_int32_t, struct sockaddr_dl *);
112 * sys_init - System-dependent initialization.
117 /* Get an internet socket for doing socket ioctl's on. */
118 if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
119 syslog(LOG_ERR, "Couldn't create IP socket: %m");
125 * sys_cleanup - restore any system state we modified before exiting:
126 * mark the interface down, delete default route and/or proxy arp entry.
127 * This should call die() because it's called from die().
135 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
136 if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) >= 0
137 && ((ifr.ifr_flags & IFF_UP) != 0)) {
138 ifr.ifr_flags &= ~IFF_UP;
139 ioctl(sockfd, SIOCSIFFLAGS, &ifr);
143 cifaddr(0, ifaddrs[0], ifaddrs[1]);
144 if (default_route_gateway)
145 cifdefaultroute(0, 0, default_route_gateway);
147 cifproxyarp(0, proxy_arp_addr);
151 * sys_close - Clean up in a child process before execing.
157 if (loop_slave >= 0) {
164 * sys_check_options - check the options that the user specified
172 * ppp_available - check whether the system has any ppp interfaces
173 * (in fact we check whether we can do an ioctl on ppp0).
180 extern char *no_ppp_msg;
182 if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
183 return 1; /* can't tell */
185 strncpy(ifr.ifr_name, "ppp0", sizeof (ifr.ifr_name));
186 ok = ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) >= 0;
190 This system lacks kernel support for PPP. To include PPP support\n\
191 in the kernel, please follow the steps detailed in the README.bsd\n\
192 file in the ppp-2.2 distribution.\n";
197 * establish_ppp - Turn the serial port into a ppp interface.
203 int pppdisc = PPPDISC;
208 * Demand mode - prime the old ppp device to relinquish the unit.
210 if (ioctl(ppp_fd, PPPIOCXFERUNIT, 0) < 0) {
211 syslog(LOG_ERR, "ioctl(transfer ppp unit): %m");
217 * Save the old line discipline of fd, and set it to PPP.
219 if (ioctl(fd, TIOCGETD, &initdisc) < 0) {
220 syslog(LOG_ERR, "ioctl(TIOCGETD): %m");
223 if (ioctl(fd, TIOCSETD, &pppdisc) < 0) {
224 syslog(LOG_ERR, "ioctl(TIOCSETD): %m");
230 * Find out which interface we were given.
232 if (ioctl(fd, PPPIOCGUNIT, &ifunit) < 0) {
233 syslog(LOG_ERR, "ioctl(PPPIOCGUNIT): %m");
238 * Check that we got the same unit again.
240 if (ioctl(fd, PPPIOCGUNIT, &x) < 0) {
241 syslog(LOG_ERR, "ioctl(PPPIOCGUNIT): %m");
245 syslog(LOG_ERR, "transfer_ppp failed: wanted unit %d, got %d",
250 ioctl(loop_slave, TIOCSETD, &x);
256 * Enable debug in the driver if requested.
259 if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
260 syslog(LOG_WARNING, "ioctl (PPPIOCGFLAGS): %m");
262 x |= (kdebugflag & 0xFF) * SC_DEBUG;
263 if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
264 syslog(LOG_WARNING, "ioctl(PPPIOCSFLAGS): %m");
269 * Set device for non-blocking reads.
271 if ((initfdflags = fcntl(fd, F_GETFL)) == -1
272 || fcntl(fd, F_SETFL, initfdflags | O_NONBLOCK) == -1) {
273 syslog(LOG_WARNING, "Couldn't set device to non-blocking mode: %m");
278 * restore_loop - reattach the ppp unit to the loopback.
286 * Transfer the ppp interface back to the loopback.
288 if (ioctl(ppp_fd, PPPIOCXFERUNIT, 0) < 0) {
289 syslog(LOG_ERR, "ioctl(transfer ppp unit): %m");
293 if (ioctl(loop_slave, TIOCSETD, &x) < 0) {
294 syslog(LOG_ERR, "ioctl(TIOCSETD): %m");
299 * Check that we got the same unit again.
301 if (ioctl(loop_slave, PPPIOCGUNIT, &x) < 0) {
302 syslog(LOG_ERR, "ioctl(PPPIOCGUNIT): %m");
306 syslog(LOG_ERR, "transfer_ppp failed: wanted unit %d, got %d",
315 * disestablish_ppp - Restore the serial port to normal operation.
316 * This shouldn't call die() because it's called from die().
322 /* Reset non-blocking mode on fd. */
323 if (initfdflags != -1 && fcntl(fd, F_SETFL, initfdflags) < 0)
324 syslog(LOG_WARNING, "Couldn't restore device fd flags: %m");
327 /* Restore old line discipline. */
328 if (initdisc >= 0 && ioctl(fd, TIOCSETD, &initdisc) < 0)
329 syslog(LOG_ERR, "ioctl(TIOCSETD): %m");
337 * Check whether the link seems not to be 8-bit clean.
345 if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) == 0) {
347 switch (~x & (SC_RCV_B7_0|SC_RCV_B7_1|SC_RCV_EVNP|SC_RCV_ODDP)) {
349 s = "bit 7 set to 1";
352 s = "bit 7 set to 0";
362 syslog(LOG_WARNING, "Serial link is not 8-bit clean:");
363 syslog(LOG_WARNING, "All received characters had %s", s);
369 * set_up_tty: Set up the serial port on `fd' for 8 bits, no parity,
370 * at the requested speed, etc. If `local' is true, set CLOCAL
371 * regardless of whether the modem option was specified.
373 * For *BSD, we assume that speed_t values numerically equal bits/second.
376 set_up_tty(fd, local)
381 if (tcgetattr(fd, &tios) < 0) {
382 syslog(LOG_ERR, "tcgetattr: %m");
388 ioctl(fd, TIOCGWINSZ, &wsinfo);
391 tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL);
392 if (crtscts > 0 && !local)
393 tios.c_cflag |= CRTSCTS;
394 else if (crtscts < 0)
395 tios.c_cflag &= ~CRTSCTS;
397 tios.c_cflag |= CS8 | CREAD | HUPCL;
399 tios.c_cflag |= CLOCAL;
400 tios.c_iflag = IGNBRK | IGNPAR;
404 tios.c_cc[VTIME] = 0;
407 tios.c_iflag |= IXON | IXOFF;
408 tios.c_cc[VSTOP] = 0x13; /* DC3 = XOFF = ^S */
409 tios.c_cc[VSTART] = 0x11; /* DC1 = XON = ^Q */
413 cfsetospeed(&tios, inspeed);
414 cfsetispeed(&tios, inspeed);
416 inspeed = cfgetospeed(&tios);
418 * We can't proceed if the serial port speed is 0,
419 * since that implies that the serial port is disabled.
422 syslog(LOG_ERR, "Baud rate for %s is 0; need explicit baud rate",
429 if (tcsetattr(fd, TCSAFLUSH, &tios) < 0) {
430 syslog(LOG_ERR, "tcsetattr: %m");
438 * restore_tty - restore the terminal to the saved settings.
445 if (!default_device) {
447 * Turn off echoing, because otherwise we can get into
448 * a loop with the tty and the modem echoing to each other.
449 * We presume we are the sole user of this tty device, so
450 * when we close it, it will revert to its defaults anyway.
452 inittermios.c_lflag &= ~(ECHO | ECHONL);
454 if (tcsetattr(fd, TCSAFLUSH, &inittermios) < 0)
456 syslog(LOG_WARNING, "tcsetattr: %m");
457 ioctl(fd, TIOCSWINSZ, &wsinfo);
463 * setdtr - control the DTR line on the serial port.
464 * This is called from die(), so it shouldn't call die().
470 int modembits = TIOCM_DTR;
472 ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits);
477 * open_ppp_loopback - open the device we use for getting
478 * packets in demand mode, and connect it to a ppp interface.
486 int pppdisc = PPPDISC;
488 if (openpty(&loop_master, &loop_slave, loop_name, NULL, NULL) < 0) {
489 syslog(LOG_ERR, "No free pty for loopback");
492 SYSDEBUG((LOG_DEBUG, "using %s for loopback", loop_name));
494 if (tcgetattr(loop_slave, &tios) == 0) {
495 tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB);
496 tios.c_cflag |= CS8 | CREAD;
497 tios.c_iflag = IGNPAR;
500 if (tcsetattr(loop_slave, TCSAFLUSH, &tios) < 0)
501 syslog(LOG_WARNING, "couldn't set attributes on loopback: %m");
504 if ((flags = fcntl(loop_master, F_GETFL)) != -1)
505 if (fcntl(loop_master, F_SETFL, flags | O_NONBLOCK) == -1)
506 syslog(LOG_WARNING, "couldn't set loopback to nonblock: %m");
509 if (ioctl(ppp_fd, TIOCSETD, &pppdisc) < 0) {
510 syslog(LOG_ERR, "ioctl(TIOCSETD): %m");
515 * Find out which interface we were given.
517 if (ioctl(ppp_fd, PPPIOCGUNIT, &ifunit) < 0) {
518 syslog(LOG_ERR, "ioctl(PPPIOCGUNIT): %m");
523 * Enable debug in the driver if requested.
526 if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &flags) < 0) {
527 syslog(LOG_WARNING, "ioctl (PPPIOCGFLAGS): %m");
529 flags |= (kdebugflag & 0xFF) * SC_DEBUG;
530 if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &flags) < 0)
531 syslog(LOG_WARNING, "ioctl(PPPIOCSFLAGS): %m");
539 * output - Output PPP packet.
548 log_packet(p, len, "sent ", LOG_DEBUG);
550 if (write(ttyfd, p, len) < 0) {
552 syslog(LOG_ERR, "write: %m");
558 * wait_input - wait until there is data available on ttyfd,
559 * for the length of time specified by *timo (indefinite
564 struct timeval *timo;
569 if (ttyfd >= FD_SETSIZE) {
570 syslog(LOG_ERR, "descriptor too big");
574 FD_SET(ttyfd, &ready);
575 n = select(ttyfd+1, &ready, NULL, &ready, timo);
576 if (n < 0 && errno != EINTR) {
577 syslog(LOG_ERR, "select: %m");
584 * wait_loop_output - wait until there is data available on the
585 * loopback, for the length of time specified by *timo (indefinite
589 wait_loop_output(timo)
590 struct timeval *timo;
595 if (loop_master >= FD_SETSIZE) {
596 syslog(LOG_ERR, "descriptor too big");
600 FD_SET(loop_master, &ready);
601 n = select(loop_master + 1, &ready, NULL, &ready, timo);
602 if (n < 0 && errno != EINTR) {
603 syslog(LOG_ERR, "select: %m");
610 * wait_time - wait for a given length of time or until a
611 * signal is received.
615 struct timeval *timo;
619 n = select(0, NULL, NULL, NULL, timo);
620 if (n < 0 && errno != EINTR) {
621 syslog(LOG_ERR, "select: %m");
628 * read_packet - get a PPP packet from the serial device.
636 if ((len = read(ttyfd, buf, PPP_MTU + PPP_HDRLEN)) < 0) {
637 if (errno == EWOULDBLOCK || errno == EINTR)
639 syslog(LOG_ERR, "read: %m");
647 * get_loop_output - read characters from the loopback, form them
648 * into frames, and detect when we want to bring the real link up.
649 * Return value is 1 if we need to bring up the link, 0 otherwise.
657 while ((n = read(loop_master, inbuf, sizeof(inbuf))) >= 0) {
658 if (loop_chars(inbuf, n))
663 syslog(LOG_ERR, "eof on loopback");
665 } else if (errno != EWOULDBLOCK){
666 syslog(LOG_ERR, "read from loopback: %m");
675 * ppp_send_config - configure the transmit characteristics of
679 ppp_send_config(unit, mtu, asyncmap, pcomp, accomp)
687 strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
689 if (ioctl(sockfd, SIOCSIFMTU, (caddr_t) &ifr) < 0) {
690 syslog(LOG_ERR, "ioctl(SIOCSIFMTU): %m");
694 if (ioctl(ppp_fd, PPPIOCSASYNCMAP, (caddr_t) &asyncmap) < 0) {
695 syslog(LOG_ERR, "ioctl(PPPIOCSASYNCMAP): %m");
699 if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
700 syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m");
703 x = pcomp? x | SC_COMP_PROT: x &~ SC_COMP_PROT;
704 x = accomp? x | SC_COMP_AC: x &~ SC_COMP_AC;
705 if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
706 syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
713 * ppp_set_xaccm - set the extended transmit ACCM for the interface.
716 ppp_set_xaccm(unit, accm)
720 if (ioctl(ppp_fd, PPPIOCSXASYNCMAP, accm) < 0 && errno != ENOTTY)
721 syslog(LOG_WARNING, "ioctl(set extended ACCM): %m");
726 * ppp_recv_config - configure the receive-side characteristics of
730 ppp_recv_config(unit, mru, asyncmap, pcomp, accomp)
737 if (ioctl(ppp_fd, PPPIOCSMRU, (caddr_t) &mru) < 0) {
738 syslog(LOG_ERR, "ioctl(PPPIOCSMRU): %m");
741 if (ioctl(ppp_fd, PPPIOCSRASYNCMAP, (caddr_t) &asyncmap) < 0) {
742 syslog(LOG_ERR, "ioctl(PPPIOCSRASYNCMAP): %m");
745 if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
746 syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m");
749 x = !accomp? x | SC_REJ_COMP_AC: x &~ SC_REJ_COMP_AC;
750 if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
751 syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
757 * ccp_test - ask kernel whether a given compression method
758 * is acceptable for use. Returns 1 if the method and parameters
759 * are OK, 0 if the method is known but the parameters are not OK
760 * (e.g. code size should be reduced), or -1 if the method is unknown.
763 ccp_test(unit, opt_ptr, opt_len, for_transmit)
764 int unit, opt_len, for_transmit;
767 struct ppp_option_data data;
770 data.length = opt_len;
771 data.transmit = for_transmit;
772 if (ioctl(ttyfd, PPPIOCSCOMPRESS, (caddr_t) &data) >= 0)
774 return (errno == ENOBUFS)? 0: -1;
778 * ccp_flags_set - inform kernel about the current state of CCP.
781 ccp_flags_set(unit, isopen, isup)
782 int unit, isopen, isup;
786 if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
787 syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m");
790 x = isopen? x | SC_CCP_OPEN: x &~ SC_CCP_OPEN;
791 x = isup? x | SC_CCP_UP: x &~ SC_CCP_UP;
792 if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
793 syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
797 * ccp_fatal_error - returns 1 if decompression was disabled as a
798 * result of an error detected after decompression of a packet,
799 * 0 otherwise. This is necessary because of patent nonsense.
802 ccp_fatal_error(unit)
807 if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
808 syslog(LOG_ERR, "ioctl(PPPIOCGFLAGS): %m");
811 return x & SC_DC_FERROR;
815 * get_idle_time - return how long the link has been idle.
822 return ioctl(ppp_fd, PPPIOCGIDLE, ip) >= 0;
828 * set_filters - transfer the pass and active filters to the kernel.
831 set_filters(pass, active)
832 struct bpf_program *pass, *active;
836 if (pass->bf_len > 0) {
837 if (ioctl(ppp_fd, PPPIOCSPASS, pass) < 0) {
838 syslog(LOG_ERR, "Couldn't set pass-filter in kernel: %m");
842 if (active->bf_len > 0) {
843 if (ioctl(ppp_fd, PPPIOCSACTIVE, active) < 0) {
844 syslog(LOG_ERR, "Couldn't set active-filter in kernel: %m");
853 * sifvjcomp - config tcp header compression
856 sifvjcomp(u, vjcomp, cidcomp, maxcid)
857 int u, vjcomp, cidcomp, maxcid;
861 if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
862 syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m");
865 x = vjcomp ? x | SC_COMP_TCP: x &~ SC_COMP_TCP;
866 x = cidcomp? x & ~SC_NO_TCP_CCID: x | SC_NO_TCP_CCID;
867 if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
868 syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
871 if (vjcomp && ioctl(ppp_fd, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0) {
872 syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
879 * sifup - Config the interface up and enable IP packets to pass.
887 strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
888 if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
889 syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m");
892 ifr.ifr_flags |= IFF_UP;
893 if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
894 syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
902 * sifnpmode - Set the mode for handling packets for a given NP.
905 sifnpmode(u, proto, mode)
912 npi.protocol = proto;
914 if (ioctl(ppp_fd, PPPIOCSNPMODE, &npi) < 0) {
915 syslog(LOG_ERR, "ioctl(set NP %d mode to %d): %m", proto, mode);
922 * sifdown - Config the interface down and disable IP.
933 npi.protocol = PPP_IP;
934 npi.mode = NPMODE_ERROR;
935 ioctl(ppp_fd, PPPIOCSNPMODE, (caddr_t) &npi);
936 /* ignore errors, because ppp_fd might have been closed by now. */
938 strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
939 if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
940 syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m");
943 ifr.ifr_flags &= ~IFF_UP;
944 if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
945 syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
954 * SET_SA_FAMILY - set the sa_family field of a struct sockaddr,
957 #define SET_SA_FAMILY(addr, family) \
958 BZERO((char *) &(addr), sizeof(addr)); \
959 addr.sa_family = (family); \
960 addr.sa_len = sizeof(addr);
963 * sifaddr - Config the interface IP addresses and netmask.
970 struct ifaliasreq ifra;
973 strncpy(ifra.ifra_name, ifname, sizeof(ifra.ifra_name));
974 SET_SA_FAMILY(ifra.ifra_addr, AF_INET);
975 ((struct sockaddr_in *) &ifra.ifra_addr)->sin_addr.s_addr = o;
976 SET_SA_FAMILY(ifra.ifra_broadaddr, AF_INET);
977 ((struct sockaddr_in *) &ifra.ifra_broadaddr)->sin_addr.s_addr = h;
979 SET_SA_FAMILY(ifra.ifra_mask, AF_INET);
980 ((struct sockaddr_in *) &ifra.ifra_mask)->sin_addr.s_addr = m;
982 BZERO(&ifra.ifra_mask, sizeof(ifra.ifra_mask));
983 BZERO(&ifr, sizeof(ifr));
984 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
985 if (ioctl(sockfd, SIOCDIFADDR, (caddr_t) &ifr) < 0) {
986 if (errno != EADDRNOTAVAIL)
987 syslog(LOG_WARNING, "Couldn't remove interface address: %m");
989 if (ioctl(sockfd, SIOCAIFADDR, (caddr_t) &ifra) < 0) {
990 if (errno != EEXIST) {
991 syslog(LOG_ERR, "Couldn't set interface address: %m");
995 "Couldn't set interface address: Address %s already exists",
1004 * cifaddr - Clear the interface IP addresses, and delete routes
1005 * through the interface if possible.
1012 struct ifaliasreq ifra;
1015 strncpy(ifra.ifra_name, ifname, sizeof(ifra.ifra_name));
1016 SET_SA_FAMILY(ifra.ifra_addr, AF_INET);
1017 ((struct sockaddr_in *) &ifra.ifra_addr)->sin_addr.s_addr = o;
1018 SET_SA_FAMILY(ifra.ifra_broadaddr, AF_INET);
1019 ((struct sockaddr_in *) &ifra.ifra_broadaddr)->sin_addr.s_addr = h;
1020 BZERO(&ifra.ifra_mask, sizeof(ifra.ifra_mask));
1021 if (ioctl(sockfd, SIOCDIFADDR, (caddr_t) &ifra) < 0) {
1022 if (errno != EADDRNOTAVAIL)
1023 syslog(LOG_WARNING, "Couldn't delete interface address: %m");
1030 * sifdefaultroute - assign a default route through the address given.
1033 sifdefaultroute(u, l, g)
1037 return dodefaultroute(g, 's');
1041 * cifdefaultroute - delete a default route through the address given.
1044 cifdefaultroute(u, l, g)
1048 return dodefaultroute(g, 'c');
1052 * dodefaultroute - talk to a routing socket to add/delete a default route.
1055 dodefaultroute(g, cmd)
1061 struct rt_msghdr hdr;
1062 struct sockaddr_in dst;
1063 struct sockaddr_in gway;
1064 struct sockaddr_in mask;
1067 if ((routes = socket(PF_ROUTE, SOCK_RAW, AF_INET)) < 0) {
1068 syslog(LOG_ERR, "Couldn't %s default route: socket: %m",
1069 cmd=='s'? "add": "delete");
1073 memset(&rtmsg, 0, sizeof(rtmsg));
1074 rtmsg.hdr.rtm_type = cmd == 's'? RTM_ADD: RTM_DELETE;
1075 rtmsg.hdr.rtm_flags = RTF_UP | RTF_GATEWAY | RTF_STATIC;
1076 rtmsg.hdr.rtm_version = RTM_VERSION;
1077 rtmsg.hdr.rtm_seq = ++rtm_seq;
1078 rtmsg.hdr.rtm_addrs = RTA_DST | RTA_GATEWAY | RTA_NETMASK;
1079 rtmsg.dst.sin_len = sizeof(rtmsg.dst);
1080 rtmsg.dst.sin_family = AF_INET;
1081 rtmsg.gway.sin_len = sizeof(rtmsg.gway);
1082 rtmsg.gway.sin_family = AF_INET;
1083 rtmsg.gway.sin_addr.s_addr = g;
1084 rtmsg.mask.sin_len = sizeof(rtmsg.dst);
1085 rtmsg.mask.sin_family = AF_INET;
1087 rtmsg.hdr.rtm_msglen = sizeof(rtmsg);
1088 if (write(routes, &rtmsg, sizeof(rtmsg)) < 0) {
1089 syslog(LOG_ERR, "Couldn't %s default route: %m",
1090 cmd=='s'? "add": "delete");
1096 default_route_gateway = (cmd == 's')? g: 0;
1100 #if RTM_VERSION >= 3
1103 * sifproxyarp - Make a proxy ARP entry for the peer.
1106 struct rt_msghdr hdr;
1107 struct sockaddr_inarp dst;
1108 struct sockaddr_dl hwa;
1112 static int arpmsg_valid;
1115 sifproxyarp(unit, hisaddr)
1122 * Get the hardware address of an interface on the same subnet
1123 * as our local address.
1125 memset(&arpmsg, 0, sizeof(arpmsg));
1126 if (!get_ether_addr(hisaddr, &arpmsg.hwa)) {
1127 syslog(LOG_ERR, "Cannot determine ethernet address for proxy ARP");
1131 if ((routes = socket(PF_ROUTE, SOCK_RAW, AF_INET)) < 0) {
1132 syslog(LOG_ERR, "Couldn't add proxy arp entry: socket: %m");
1136 arpmsg.hdr.rtm_type = RTM_ADD;
1137 arpmsg.hdr.rtm_flags = RTF_ANNOUNCE | RTF_HOST | RTF_STATIC;
1138 arpmsg.hdr.rtm_version = RTM_VERSION;
1139 arpmsg.hdr.rtm_seq = ++rtm_seq;
1140 arpmsg.hdr.rtm_addrs = RTA_DST | RTA_GATEWAY;
1141 arpmsg.hdr.rtm_inits = RTV_EXPIRE;
1142 arpmsg.dst.sin_len = sizeof(struct sockaddr_inarp);
1143 arpmsg.dst.sin_family = AF_INET;
1144 arpmsg.dst.sin_addr.s_addr = hisaddr;
1145 arpmsg.dst.sin_other = SIN_PROXY;
1147 arpmsg.hdr.rtm_msglen = (char *) &arpmsg.hwa - (char *) &arpmsg
1148 + arpmsg.hwa.sdl_len;
1149 if (write(routes, &arpmsg, arpmsg.hdr.rtm_msglen) < 0) {
1150 syslog(LOG_ERR, "Couldn't add proxy arp entry: %m");
1157 proxy_arp_addr = hisaddr;
1162 * cifproxyarp - Delete the proxy ARP entry for the peer.
1165 cifproxyarp(unit, hisaddr)
1175 arpmsg.hdr.rtm_type = RTM_DELETE;
1176 arpmsg.hdr.rtm_seq = ++rtm_seq;
1178 if ((routes = socket(PF_ROUTE, SOCK_RAW, AF_INET)) < 0) {
1179 syslog(LOG_ERR, "Couldn't delete proxy arp entry: socket: %m");
1183 if (write(routes, &arpmsg, arpmsg.hdr.rtm_msglen) < 0) {
1184 syslog(LOG_ERR, "Couldn't delete proxy arp entry: %m");
1194 #else /* RTM_VERSION */
1197 * sifproxyarp - Make a proxy ARP entry for the peer.
1200 sifproxyarp(unit, hisaddr)
1204 struct arpreq arpreq;
1206 struct sockaddr_dl sdl;
1210 BZERO(&arpreq, sizeof(arpreq));
1213 * Get the hardware address of an interface on the same subnet
1214 * as our local address.
1216 if (!get_ether_addr(hisaddr, &dls.sdl)) {
1217 syslog(LOG_ERR, "Cannot determine ethernet address for proxy ARP");
1221 arpreq.arp_ha.sa_len = sizeof(struct sockaddr);
1222 arpreq.arp_ha.sa_family = AF_UNSPEC;
1223 BCOPY(LLADDR(&dls.sdl), arpreq.arp_ha.sa_data, dls.sdl.sdl_alen);
1224 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
1225 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
1226 arpreq.arp_flags = ATF_PERM | ATF_PUBL;
1227 if (ioctl(sockfd, SIOCSARP, (caddr_t)&arpreq) < 0) {
1228 syslog(LOG_ERR, "Couldn't add proxy arp entry: %m");
1232 proxy_arp_addr = hisaddr;
1237 * cifproxyarp - Delete the proxy ARP entry for the peer.
1240 cifproxyarp(unit, hisaddr)
1244 struct arpreq arpreq;
1246 BZERO(&arpreq, sizeof(arpreq));
1247 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
1248 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
1249 if (ioctl(sockfd, SIOCDARP, (caddr_t)&arpreq) < 0) {
1250 syslog(LOG_WARNING, "Couldn't delete proxy arp entry: %m");
1256 #endif /* RTM_VERSION */
1259 /********************************************************************
1261 * sipxfaddr - Config the interface IPX networknumber
1265 sipxfaddr (int unit, unsigned long int network, unsigned char * node )
1270 struct sockaddr_ipx ipx_addr;
1272 struct sockaddr_ipx *sipx = (struct sockaddr_ipx *) &ifr.ifr_addr;
1273 union ipx_net_u net;
1275 skfd = socket (AF_IPX, SOCK_DGRAM, 0);
1278 syslog (LOG_DEBUG, "socket(AF_IPX): %m(%d)", errno);
1283 memset (&ifr, '\0', sizeof (ifr));
1284 strcpy (ifr.ifr_name, ifname);
1286 memcpy (sipx->sipx_addr.x_host.c_host, node, 6);
1287 sipx->sipx_len = sizeof(sipx);
1288 sipx->sipx_family = AF_IPX;
1289 sipx->sipx_port = 0;
1290 memset(&net, 0, sizeof(net));
1291 net.long_e = htonl (network);
1292 sipx->sipx_addr.x_net = net.net_e;
1294 * Set the IPX device
1296 if (ioctl(skfd, SIOCSIFADDR, (caddr_t) &ifr) < 0)
1299 if (errno != EEXIST)
1302 "ioctl(SIOCAIFADDR, CRTITF): %m(%d)", errno);
1306 syslog (LOG_WARNING,
1307 "ioctl(SIOCAIFADDR, CRTITF): Address already exists");
1315 /********************************************************************
1317 * cipxfaddr - Clear the information for the IPX network. The IPX routes
1318 * are removed and the device is no longer able to pass IPX
1322 int cipxfaddr (int unit)
1327 struct sockaddr_ipx ipx_addr;
1329 struct sockaddr_ipx *sipx = (struct sockaddr_ipx *) &ifr.ifr_addr;
1331 skfd = socket (AF_IPX, SOCK_DGRAM, 0);
1334 syslog (LOG_DEBUG, "socket(AF_IPX): %m(%d)", errno);
1339 memset (&ifr, '\0', sizeof (ifr));
1340 strcpy (ifr.ifr_name, ifname);
1342 sipx->sipx_len = sizeof(sipx);
1343 sipx->sipx_family = AF_IPX;
1345 * Set the IPX device
1347 if (ioctl(skfd, SIOCSIFADDR, (caddr_t) &ifr) < 0)
1350 "ioctl(SIOCAIFADDR, IPX_DLTITF): %m(%d)", errno);
1360 * get_ether_addr - get the hardware address of an interface on the
1361 * the same subnet as ipaddr.
1366 get_ether_addr(ipaddr, hwaddr)
1368 struct sockaddr_dl *hwaddr;
1370 struct ifreq *ifr, *ifend, *ifp;
1371 u_int32_t ina, mask;
1372 struct sockaddr_dl *dla;
1375 struct ifreq ifs[MAX_IFS];
1377 ifc.ifc_len = sizeof(ifs);
1379 if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1380 syslog(LOG_ERR, "ioctl(SIOCGIFCONF): %m");
1385 * Scan through looking for an interface with an Internet
1386 * address on the same subnet as `ipaddr'.
1388 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1389 for (ifr = ifc.ifc_req; ifr < ifend;
1390 ifr = (struct ifreq *) ((char *)&ifr->ifr_addr
1391 + MAX(ifr->ifr_addr.sa_len, sizeof(ifr->ifr_addr)))) {
1392 if (ifr->ifr_addr.sa_family == AF_INET) {
1393 ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
1394 strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1396 * Check that the interface is up, and not point-to-point
1399 if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1401 if ((ifreq.ifr_flags &
1402 (IFF_UP|IFF_BROADCAST|IFF_POINTOPOINT|IFF_LOOPBACK|IFF_NOARP))
1403 != (IFF_UP|IFF_BROADCAST))
1406 * Get its netmask and check that it's on the right subnet.
1408 if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1410 mask = ((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr.s_addr;
1411 if ((ipaddr & mask) != (ina & mask))
1420 syslog(LOG_INFO, "found interface %s for proxy arp", ifr->ifr_name);
1423 * Now scan through again looking for a link-level address
1424 * for this interface.
1427 for (ifr = ifc.ifc_req; ifr < ifend; ) {
1428 if (strcmp(ifp->ifr_name, ifr->ifr_name) == 0
1429 && ifr->ifr_addr.sa_family == AF_LINK) {
1431 * Found the link-level address - copy it out
1433 dla = (struct sockaddr_dl *) &ifr->ifr_addr;
1434 BCOPY(dla, hwaddr, dla->sdl_len);
1437 ifr = (struct ifreq *) ((char *)&ifr->ifr_addr
1438 + MAX(ifr->ifr_addr.sa_len, sizeof(ifr->ifr_addr)));
1445 * Return user specified netmask, modified by any mask we might determine
1446 * for address `addr' (in network byte order).
1447 * Here we scan through the system's list of interfaces, looking for
1448 * any non-point-to-point interfaces which might appear to be on the same
1449 * network as `addr'. If we find any, we OR in their netmask to the
1450 * user-specified netmask.
1456 u_int32_t mask, nmask, ina;
1457 struct ifreq *ifr, *ifend, ifreq;
1459 struct ifreq ifs[MAX_IFS];
1462 if (IN_CLASSA(addr)) /* determine network mask for address class */
1463 nmask = IN_CLASSA_NET;
1464 else if (IN_CLASSB(addr))
1465 nmask = IN_CLASSB_NET;
1467 nmask = IN_CLASSC_NET;
1468 /* class D nets are disallowed by bad_ip_adrs */
1469 mask = netmask | htonl(nmask);
1472 * Scan through the system's network interfaces.
1474 ifc.ifc_len = sizeof(ifs);
1476 if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1477 syslog(LOG_WARNING, "ioctl(SIOCGIFCONF): %m");
1480 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1481 for (ifr = ifc.ifc_req; ifr < ifend;
1482 ifr = (struct ifreq *) ((char *)&ifr->ifr_addr
1483 + MAX(ifr->ifr_addr.sa_len, sizeof(ifr->ifr_addr)))) {
1485 * Check the interface's internet address.
1487 if (ifr->ifr_addr.sa_family != AF_INET)
1489 ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
1490 if ((ntohl(ina) & nmask) != (addr & nmask))
1493 * Check that the interface is up, and not point-to-point or loopback.
1495 strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1496 if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1498 if ((ifreq.ifr_flags & (IFF_UP|IFF_POINTOPOINT|IFF_LOOPBACK))
1502 * Get its netmask and OR it into our mask.
1504 if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1506 mask |= ((struct sockaddr_in *)&ifreq.ifr_addr)->sin_addr.s_addr;
1513 * Use the hostid as part of the random number seed.
1522 * lock - create a lock file for the named lock device
1524 #define LOCK_PREFIX "/var/spool/lock/LCK.."
1530 char hdb_lock_buffer[12];
1534 if ((p = strrchr(dev, '/')) != NULL)
1536 lock_file = malloc(strlen(LOCK_PREFIX) + strlen(dev) + 1);
1537 if (lock_file == NULL)
1538 novm("lock file name");
1539 strcat(strcpy(lock_file, LOCK_PREFIX), dev);
1541 while ((fd = open(lock_file, O_EXCL | O_CREAT | O_RDWR, 0644)) < 0) {
1543 && (fd = open(lock_file, O_RDONLY, 0)) >= 0) {
1544 /* Read the lock file to find out who has the device locked */
1545 n = read(fd, hdb_lock_buffer, 11);
1547 syslog(LOG_ERR, "Can't read pid from lock file %s", lock_file);
1550 hdb_lock_buffer[n] = 0;
1551 pid = atoi(hdb_lock_buffer);
1552 if (kill(pid, 0) == -1 && errno == ESRCH) {
1553 /* pid no longer exists - remove the lock file */
1554 if (unlink(lock_file) == 0) {
1556 syslog(LOG_NOTICE, "Removed stale lock on %s (pid %d)",
1560 syslog(LOG_WARNING, "Couldn't remove stale lock on %s",
1563 syslog(LOG_NOTICE, "Device %s is locked by pid %d",
1568 syslog(LOG_ERR, "Can't create lock file %s: %m", lock_file);
1574 sprintf(hdb_lock_buffer, "%10d\n", getpid());
1575 write(fd, hdb_lock_buffer, 11);
1582 * unlock - remove our lockfile