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[] = "$FreeBSD$";
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_defs.h>
56 #include <net/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 __P((u_int32_t, int));
108 static int get_ether_addr __P((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;
570 FD_SET(ttyfd, &ready);
571 n = select(ttyfd+1, &ready, NULL, &ready, timo);
572 if (n < 0 && errno != EINTR) {
573 syslog(LOG_ERR, "select: %m");
580 * wait_loop_output - wait until there is data available on the
581 * loopback, for the length of time specified by *timo (indefinite
585 wait_loop_output(timo)
586 struct timeval *timo;
592 FD_SET(loop_master, &ready);
593 n = select(loop_master + 1, &ready, NULL, &ready, timo);
594 if (n < 0 && errno != EINTR) {
595 syslog(LOG_ERR, "select: %m");
602 * wait_time - wait for a given length of time or until a
603 * signal is received.
607 struct timeval *timo;
611 n = select(0, NULL, NULL, NULL, timo);
612 if (n < 0 && errno != EINTR) {
613 syslog(LOG_ERR, "select: %m");
620 * read_packet - get a PPP packet from the serial device.
628 if ((len = read(ttyfd, buf, PPP_MTU + PPP_HDRLEN)) < 0) {
629 if (errno == EWOULDBLOCK || errno == EINTR)
631 syslog(LOG_ERR, "read: %m");
639 * get_loop_output - read characters from the loopback, form them
640 * into frames, and detect when we want to bring the real link up.
641 * Return value is 1 if we need to bring up the link, 0 otherwise.
649 while ((n = read(loop_master, inbuf, sizeof(inbuf))) >= 0) {
650 if (loop_chars(inbuf, n))
655 syslog(LOG_ERR, "eof on loopback");
657 } else if (errno != EWOULDBLOCK){
658 syslog(LOG_ERR, "read from loopback: %m");
667 * ppp_send_config - configure the transmit characteristics of
671 ppp_send_config(unit, mtu, asyncmap, pcomp, accomp)
679 strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
681 if (ioctl(sockfd, SIOCSIFMTU, (caddr_t) &ifr) < 0) {
682 syslog(LOG_ERR, "ioctl(SIOCSIFMTU): %m");
686 if (ioctl(ppp_fd, PPPIOCSASYNCMAP, (caddr_t) &asyncmap) < 0) {
687 syslog(LOG_ERR, "ioctl(PPPIOCSASYNCMAP): %m");
691 if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
692 syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m");
695 x = pcomp? x | SC_COMP_PROT: x &~ SC_COMP_PROT;
696 x = accomp? x | SC_COMP_AC: x &~ SC_COMP_AC;
697 if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
698 syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
705 * ppp_set_xaccm - set the extended transmit ACCM for the interface.
708 ppp_set_xaccm(unit, accm)
712 if (ioctl(ppp_fd, PPPIOCSXASYNCMAP, accm) < 0 && errno != ENOTTY)
713 syslog(LOG_WARNING, "ioctl(set extended ACCM): %m");
718 * ppp_recv_config - configure the receive-side characteristics of
722 ppp_recv_config(unit, mru, asyncmap, pcomp, accomp)
729 if (ioctl(ppp_fd, PPPIOCSMRU, (caddr_t) &mru) < 0) {
730 syslog(LOG_ERR, "ioctl(PPPIOCSMRU): %m");
733 if (ioctl(ppp_fd, PPPIOCSRASYNCMAP, (caddr_t) &asyncmap) < 0) {
734 syslog(LOG_ERR, "ioctl(PPPIOCSRASYNCMAP): %m");
737 if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
738 syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m");
741 x = !accomp? x | SC_REJ_COMP_AC: x &~ SC_REJ_COMP_AC;
742 if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
743 syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
749 * ccp_test - ask kernel whether a given compression method
750 * is acceptable for use. Returns 1 if the method and parameters
751 * are OK, 0 if the method is known but the parameters are not OK
752 * (e.g. code size should be reduced), or -1 if the method is unknown.
755 ccp_test(unit, opt_ptr, opt_len, for_transmit)
756 int unit, opt_len, for_transmit;
759 struct ppp_option_data data;
762 data.length = opt_len;
763 data.transmit = for_transmit;
764 if (ioctl(ttyfd, PPPIOCSCOMPRESS, (caddr_t) &data) >= 0)
766 return (errno == ENOBUFS)? 0: -1;
770 * ccp_flags_set - inform kernel about the current state of CCP.
773 ccp_flags_set(unit, isopen, isup)
774 int unit, isopen, isup;
778 if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
779 syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m");
782 x = isopen? x | SC_CCP_OPEN: x &~ SC_CCP_OPEN;
783 x = isup? x | SC_CCP_UP: x &~ SC_CCP_UP;
784 if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
785 syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
789 * ccp_fatal_error - returns 1 if decompression was disabled as a
790 * result of an error detected after decompression of a packet,
791 * 0 otherwise. This is necessary because of patent nonsense.
794 ccp_fatal_error(unit)
799 if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
800 syslog(LOG_ERR, "ioctl(PPPIOCGFLAGS): %m");
803 return x & SC_DC_FERROR;
807 * get_idle_time - return how long the link has been idle.
814 return ioctl(ppp_fd, PPPIOCGIDLE, ip) >= 0;
820 * set_filters - transfer the pass and active filters to the kernel.
823 set_filters(pass, active)
824 struct bpf_program *pass, *active;
828 if (pass->bf_len > 0) {
829 if (ioctl(ppp_fd, PPPIOCSPASS, pass) < 0) {
830 syslog(LOG_ERR, "Couldn't set pass-filter in kernel: %m");
834 if (active->bf_len > 0) {
835 if (ioctl(ppp_fd, PPPIOCSACTIVE, active) < 0) {
836 syslog(LOG_ERR, "Couldn't set active-filter in kernel: %m");
845 * sifvjcomp - config tcp header compression
848 sifvjcomp(u, vjcomp, cidcomp, maxcid)
849 int u, vjcomp, cidcomp, maxcid;
853 if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
854 syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m");
857 x = vjcomp ? x | SC_COMP_TCP: x &~ SC_COMP_TCP;
858 x = cidcomp? x & ~SC_NO_TCP_CCID: x | SC_NO_TCP_CCID;
859 if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
860 syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
863 if (vjcomp && ioctl(ppp_fd, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0) {
864 syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
871 * sifup - Config the interface up and enable IP packets to pass.
879 strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
880 if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
881 syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m");
884 ifr.ifr_flags |= IFF_UP;
885 if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
886 syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
894 * sifnpmode - Set the mode for handling packets for a given NP.
897 sifnpmode(u, proto, mode)
904 npi.protocol = proto;
906 if (ioctl(ppp_fd, PPPIOCSNPMODE, &npi) < 0) {
907 syslog(LOG_ERR, "ioctl(set NP %d mode to %d): %m", proto, mode);
914 * sifdown - Config the interface down and disable IP.
925 npi.protocol = PPP_IP;
926 npi.mode = NPMODE_ERROR;
927 ioctl(ppp_fd, PPPIOCSNPMODE, (caddr_t) &npi);
928 /* ignore errors, because ppp_fd might have been closed by now. */
930 strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
931 if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
932 syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m");
935 ifr.ifr_flags &= ~IFF_UP;
936 if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
937 syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
946 * SET_SA_FAMILY - set the sa_family field of a struct sockaddr,
949 #define SET_SA_FAMILY(addr, family) \
950 BZERO((char *) &(addr), sizeof(addr)); \
951 addr.sa_family = (family); \
952 addr.sa_len = sizeof(addr);
955 * sifaddr - Config the interface IP addresses and netmask.
962 struct ifaliasreq ifra;
965 strncpy(ifra.ifra_name, ifname, sizeof(ifra.ifra_name));
966 SET_SA_FAMILY(ifra.ifra_addr, AF_INET);
967 ((struct sockaddr_in *) &ifra.ifra_addr)->sin_addr.s_addr = o;
968 SET_SA_FAMILY(ifra.ifra_broadaddr, AF_INET);
969 ((struct sockaddr_in *) &ifra.ifra_broadaddr)->sin_addr.s_addr = h;
971 SET_SA_FAMILY(ifra.ifra_mask, AF_INET);
972 ((struct sockaddr_in *) &ifra.ifra_mask)->sin_addr.s_addr = m;
974 BZERO(&ifra.ifra_mask, sizeof(ifra.ifra_mask));
975 BZERO(&ifr, sizeof(ifr));
976 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
977 if (ioctl(sockfd, SIOCDIFADDR, (caddr_t) &ifr) < 0) {
978 if (errno != EADDRNOTAVAIL)
979 syslog(LOG_WARNING, "Couldn't remove interface address: %m");
981 if (ioctl(sockfd, SIOCAIFADDR, (caddr_t) &ifra) < 0) {
982 if (errno != EEXIST) {
983 syslog(LOG_ERR, "Couldn't set interface address: %m");
987 "Couldn't set interface address: Address %s already exists",
996 * cifaddr - Clear the interface IP addresses, and delete routes
997 * through the interface if possible.
1004 struct ifaliasreq ifra;
1007 strncpy(ifra.ifra_name, ifname, sizeof(ifra.ifra_name));
1008 SET_SA_FAMILY(ifra.ifra_addr, AF_INET);
1009 ((struct sockaddr_in *) &ifra.ifra_addr)->sin_addr.s_addr = o;
1010 SET_SA_FAMILY(ifra.ifra_broadaddr, AF_INET);
1011 ((struct sockaddr_in *) &ifra.ifra_broadaddr)->sin_addr.s_addr = h;
1012 BZERO(&ifra.ifra_mask, sizeof(ifra.ifra_mask));
1013 if (ioctl(sockfd, SIOCDIFADDR, (caddr_t) &ifra) < 0) {
1014 if (errno != EADDRNOTAVAIL)
1015 syslog(LOG_WARNING, "Couldn't delete interface address: %m");
1022 * sifdefaultroute - assign a default route through the address given.
1025 sifdefaultroute(u, l, g)
1029 return dodefaultroute(g, 's');
1033 * cifdefaultroute - delete a default route through the address given.
1036 cifdefaultroute(u, l, g)
1040 return dodefaultroute(g, 'c');
1044 * dodefaultroute - talk to a routing socket to add/delete a default route.
1047 dodefaultroute(g, cmd)
1053 struct rt_msghdr hdr;
1054 struct sockaddr_in dst;
1055 struct sockaddr_in gway;
1056 struct sockaddr_in mask;
1059 if ((routes = socket(PF_ROUTE, SOCK_RAW, AF_INET)) < 0) {
1060 syslog(LOG_ERR, "Couldn't %s default route: socket: %m",
1061 cmd=='s'? "add": "delete");
1065 memset(&rtmsg, 0, sizeof(rtmsg));
1066 rtmsg.hdr.rtm_type = cmd == 's'? RTM_ADD: RTM_DELETE;
1067 rtmsg.hdr.rtm_flags = RTF_UP | RTF_GATEWAY | RTF_STATIC;
1068 rtmsg.hdr.rtm_version = RTM_VERSION;
1069 rtmsg.hdr.rtm_seq = ++rtm_seq;
1070 rtmsg.hdr.rtm_addrs = RTA_DST | RTA_GATEWAY | RTA_NETMASK;
1071 rtmsg.dst.sin_len = sizeof(rtmsg.dst);
1072 rtmsg.dst.sin_family = AF_INET;
1073 rtmsg.gway.sin_len = sizeof(rtmsg.gway);
1074 rtmsg.gway.sin_family = AF_INET;
1075 rtmsg.gway.sin_addr.s_addr = g;
1076 rtmsg.mask.sin_len = sizeof(rtmsg.dst);
1077 rtmsg.mask.sin_family = AF_INET;
1079 rtmsg.hdr.rtm_msglen = sizeof(rtmsg);
1080 if (write(routes, &rtmsg, sizeof(rtmsg)) < 0) {
1081 syslog(LOG_ERR, "Couldn't %s default route: %m",
1082 cmd=='s'? "add": "delete");
1088 default_route_gateway = (cmd == 's')? g: 0;
1092 #if RTM_VERSION >= 3
1095 * sifproxyarp - Make a proxy ARP entry for the peer.
1098 struct rt_msghdr hdr;
1099 struct sockaddr_inarp dst;
1100 struct sockaddr_dl hwa;
1104 static int arpmsg_valid;
1107 sifproxyarp(unit, hisaddr)
1114 * Get the hardware address of an interface on the same subnet
1115 * as our local address.
1117 memset(&arpmsg, 0, sizeof(arpmsg));
1118 if (!get_ether_addr(hisaddr, &arpmsg.hwa)) {
1119 syslog(LOG_ERR, "Cannot determine ethernet address for proxy ARP");
1123 if ((routes = socket(PF_ROUTE, SOCK_RAW, AF_INET)) < 0) {
1124 syslog(LOG_ERR, "Couldn't add proxy arp entry: socket: %m");
1128 arpmsg.hdr.rtm_type = RTM_ADD;
1129 arpmsg.hdr.rtm_flags = RTF_ANNOUNCE | RTF_HOST | RTF_STATIC;
1130 arpmsg.hdr.rtm_version = RTM_VERSION;
1131 arpmsg.hdr.rtm_seq = ++rtm_seq;
1132 arpmsg.hdr.rtm_addrs = RTA_DST | RTA_GATEWAY;
1133 arpmsg.hdr.rtm_inits = RTV_EXPIRE;
1134 arpmsg.dst.sin_len = sizeof(struct sockaddr_inarp);
1135 arpmsg.dst.sin_family = AF_INET;
1136 arpmsg.dst.sin_addr.s_addr = hisaddr;
1137 arpmsg.dst.sin_other = SIN_PROXY;
1139 arpmsg.hdr.rtm_msglen = (char *) &arpmsg.hwa - (char *) &arpmsg
1140 + arpmsg.hwa.sdl_len;
1141 if (write(routes, &arpmsg, arpmsg.hdr.rtm_msglen) < 0) {
1142 syslog(LOG_ERR, "Couldn't add proxy arp entry: %m");
1149 proxy_arp_addr = hisaddr;
1154 * cifproxyarp - Delete the proxy ARP entry for the peer.
1157 cifproxyarp(unit, hisaddr)
1167 arpmsg.hdr.rtm_type = RTM_DELETE;
1168 arpmsg.hdr.rtm_seq = ++rtm_seq;
1170 if ((routes = socket(PF_ROUTE, SOCK_RAW, AF_INET)) < 0) {
1171 syslog(LOG_ERR, "Couldn't delete proxy arp entry: socket: %m");
1175 if (write(routes, &arpmsg, arpmsg.hdr.rtm_msglen) < 0) {
1176 syslog(LOG_ERR, "Couldn't delete proxy arp entry: %m");
1186 #else /* RTM_VERSION */
1189 * sifproxyarp - Make a proxy ARP entry for the peer.
1192 sifproxyarp(unit, hisaddr)
1196 struct arpreq arpreq;
1198 struct sockaddr_dl sdl;
1202 BZERO(&arpreq, sizeof(arpreq));
1205 * Get the hardware address of an interface on the same subnet
1206 * as our local address.
1208 if (!get_ether_addr(hisaddr, &dls.sdl)) {
1209 syslog(LOG_ERR, "Cannot determine ethernet address for proxy ARP");
1213 arpreq.arp_ha.sa_len = sizeof(struct sockaddr);
1214 arpreq.arp_ha.sa_family = AF_UNSPEC;
1215 BCOPY(LLADDR(&dls.sdl), arpreq.arp_ha.sa_data, dls.sdl.sdl_alen);
1216 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
1217 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
1218 arpreq.arp_flags = ATF_PERM | ATF_PUBL;
1219 if (ioctl(sockfd, SIOCSARP, (caddr_t)&arpreq) < 0) {
1220 syslog(LOG_ERR, "Couldn't add proxy arp entry: %m");
1224 proxy_arp_addr = hisaddr;
1229 * cifproxyarp - Delete the proxy ARP entry for the peer.
1232 cifproxyarp(unit, hisaddr)
1236 struct arpreq arpreq;
1238 BZERO(&arpreq, sizeof(arpreq));
1239 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
1240 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
1241 if (ioctl(sockfd, SIOCDARP, (caddr_t)&arpreq) < 0) {
1242 syslog(LOG_WARNING, "Couldn't delete proxy arp entry: %m");
1248 #endif /* RTM_VERSION */
1251 /********************************************************************
1253 * sipxfaddr - Config the interface IPX networknumber
1257 sipxfaddr (int unit, unsigned long int network, unsigned char * node )
1262 struct sockaddr_ipx ipx_addr;
1264 struct sockaddr_ipx *sipx = (struct sockaddr_ipx *) &ifr.ifr_addr;
1265 union ipx_net_u net;
1267 skfd = socket (AF_IPX, SOCK_DGRAM, 0);
1270 syslog (LOG_DEBUG, "socket(AF_IPX): %m(%d)", errno);
1275 memset (&ifr, '\0', sizeof (ifr));
1276 strcpy (ifr.ifr_name, ifname);
1278 memcpy (sipx->sipx_addr.x_host.c_host, node, 6);
1279 sipx->sipx_len = sizeof(sipx);
1280 sipx->sipx_family = AF_IPX;
1281 sipx->sipx_port = 0;
1282 memset(&net, 0, sizeof(net));
1283 net.long_e = htonl (network);
1284 sipx->sipx_addr.x_net = net.net_e;
1286 * Set the IPX device
1288 if (ioctl(skfd, SIOCSIFADDR, (caddr_t) &ifr) < 0)
1291 if (errno != EEXIST)
1294 "ioctl(SIOCAIFADDR, CRTITF): %m(%d)", errno);
1298 syslog (LOG_WARNING,
1299 "ioctl(SIOCAIFADDR, CRTITF): Address already exists");
1307 /********************************************************************
1309 * cipxfaddr - Clear the information for the IPX network. The IPX routes
1310 * are removed and the device is no longer able to pass IPX
1314 int cipxfaddr (int unit)
1319 struct sockaddr_ipx ipx_addr;
1321 struct sockaddr_ipx *sipx = (struct sockaddr_ipx *) &ifr.ifr_addr;
1323 skfd = socket (AF_IPX, SOCK_DGRAM, 0);
1326 syslog (LOG_DEBUG, "socket(AF_IPX): %m(%d)", errno);
1331 memset (&ifr, '\0', sizeof (ifr));
1332 strcpy (ifr.ifr_name, ifname);
1334 sipx->sipx_len = sizeof(sipx);
1335 sipx->sipx_family = AF_IPX;
1337 * Set the IPX device
1339 if (ioctl(skfd, SIOCSIFADDR, (caddr_t) &ifr) < 0)
1342 "ioctl(SIOCAIFADDR, IPX_DLTITF): %m(%d)", errno);
1352 * get_ether_addr - get the hardware address of an interface on the
1353 * the same subnet as ipaddr.
1358 get_ether_addr(ipaddr, hwaddr)
1360 struct sockaddr_dl *hwaddr;
1362 struct ifreq *ifr, *ifend, *ifp;
1363 u_int32_t ina, mask;
1364 struct sockaddr_dl *dla;
1367 struct ifreq ifs[MAX_IFS];
1369 ifc.ifc_len = sizeof(ifs);
1371 if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1372 syslog(LOG_ERR, "ioctl(SIOCGIFCONF): %m");
1377 * Scan through looking for an interface with an Internet
1378 * address on the same subnet as `ipaddr'.
1380 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1381 for (ifr = ifc.ifc_req; ifr < ifend;
1382 ifr = (struct ifreq *) ((char *)&ifr->ifr_addr
1383 + MAX(ifr->ifr_addr.sa_len, sizeof(ifr->ifr_addr)))) {
1384 if (ifr->ifr_addr.sa_family == AF_INET) {
1385 ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
1386 strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1388 * Check that the interface is up, and not point-to-point
1391 if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1393 if ((ifreq.ifr_flags &
1394 (IFF_UP|IFF_BROADCAST|IFF_POINTOPOINT|IFF_LOOPBACK|IFF_NOARP))
1395 != (IFF_UP|IFF_BROADCAST))
1398 * Get its netmask and check that it's on the right subnet.
1400 if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1402 mask = ((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr.s_addr;
1403 if ((ipaddr & mask) != (ina & mask))
1412 syslog(LOG_INFO, "found interface %s for proxy arp", ifr->ifr_name);
1415 * Now scan through again looking for a link-level address
1416 * for this interface.
1419 for (ifr = ifc.ifc_req; ifr < ifend; ) {
1420 if (strcmp(ifp->ifr_name, ifr->ifr_name) == 0
1421 && ifr->ifr_addr.sa_family == AF_LINK) {
1423 * Found the link-level address - copy it out
1425 dla = (struct sockaddr_dl *) &ifr->ifr_addr;
1426 BCOPY(dla, hwaddr, dla->sdl_len);
1429 ifr = (struct ifreq *) ((char *)&ifr->ifr_addr
1430 + MAX(ifr->ifr_addr.sa_len, sizeof(ifr->ifr_addr)));
1437 * Return user specified netmask, modified by any mask we might determine
1438 * for address `addr' (in network byte order).
1439 * Here we scan through the system's list of interfaces, looking for
1440 * any non-point-to-point interfaces which might appear to be on the same
1441 * network as `addr'. If we find any, we OR in their netmask to the
1442 * user-specified netmask.
1448 u_int32_t mask, nmask, ina;
1449 struct ifreq *ifr, *ifend, ifreq;
1451 struct ifreq ifs[MAX_IFS];
1454 if (IN_CLASSA(addr)) /* determine network mask for address class */
1455 nmask = IN_CLASSA_NET;
1456 else if (IN_CLASSB(addr))
1457 nmask = IN_CLASSB_NET;
1459 nmask = IN_CLASSC_NET;
1460 /* class D nets are disallowed by bad_ip_adrs */
1461 mask = netmask | htonl(nmask);
1464 * Scan through the system's network interfaces.
1466 ifc.ifc_len = sizeof(ifs);
1468 if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1469 syslog(LOG_WARNING, "ioctl(SIOCGIFCONF): %m");
1472 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1473 for (ifr = ifc.ifc_req; ifr < ifend;
1474 ifr = (struct ifreq *) ((char *)&ifr->ifr_addr
1475 + MAX(ifr->ifr_addr.sa_len, sizeof(ifr->ifr_addr)))) {
1477 * Check the interface's internet address.
1479 if (ifr->ifr_addr.sa_family != AF_INET)
1481 ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
1482 if ((ntohl(ina) & nmask) != (addr & nmask))
1485 * Check that the interface is up, and not point-to-point or loopback.
1487 strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1488 if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1490 if ((ifreq.ifr_flags & (IFF_UP|IFF_POINTOPOINT|IFF_LOOPBACK))
1494 * Get its netmask and OR it into our mask.
1496 if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1498 mask |= ((struct sockaddr_in *)&ifreq.ifr_addr)->sin_addr.s_addr;
1505 * Use the hostid as part of the random number seed.
1514 * lock - create a lock file for the named lock device
1516 #define LOCK_PREFIX "/var/spool/lock/LCK.."
1522 char hdb_lock_buffer[12];
1526 if ((p = strrchr(dev, '/')) != NULL)
1528 lock_file = malloc(strlen(LOCK_PREFIX) + strlen(dev) + 1);
1529 if (lock_file == NULL)
1530 novm("lock file name");
1531 strcat(strcpy(lock_file, LOCK_PREFIX), dev);
1533 while ((fd = open(lock_file, O_EXCL | O_CREAT | O_RDWR, 0644)) < 0) {
1535 && (fd = open(lock_file, O_RDONLY, 0)) >= 0) {
1536 /* Read the lock file to find out who has the device locked */
1537 n = read(fd, hdb_lock_buffer, 11);
1539 syslog(LOG_ERR, "Can't read pid from lock file %s", lock_file);
1542 hdb_lock_buffer[n] = 0;
1543 pid = atoi(hdb_lock_buffer);
1544 if (kill(pid, 0) == -1 && errno == ESRCH) {
1545 /* pid no longer exists - remove the lock file */
1546 if (unlink(lock_file) == 0) {
1548 syslog(LOG_NOTICE, "Removed stale lock on %s (pid %d)",
1552 syslog(LOG_WARNING, "Couldn't remove stale lock on %s",
1555 syslog(LOG_NOTICE, "Device %s is locked by pid %d",
1560 syslog(LOG_ERR, "Can't create lock file %s: %m", lock_file);
1566 sprintf(hdb_lock_buffer, "%10d\n", getpid());
1567 write(fd, hdb_lock_buffer, 11);
1574 * unlock - remove our lockfile