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 1.6 2005/11/24 23:42:54 swildner 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
167 sys_check_options(void)
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.
200 establish_ppp(int fd)
202 int pppdisc = PPPDISC;
207 * Demand mode - prime the old ppp device to relinquish the unit.
209 if (ioctl(ppp_fd, PPPIOCXFERUNIT, 0) < 0) {
210 syslog(LOG_ERR, "ioctl(transfer ppp unit): %m");
216 * Save the old line discipline of fd, and set it to PPP.
218 if (ioctl(fd, TIOCGETD, &initdisc) < 0) {
219 syslog(LOG_ERR, "ioctl(TIOCGETD): %m");
222 if (ioctl(fd, TIOCSETD, &pppdisc) < 0) {
223 syslog(LOG_ERR, "ioctl(TIOCSETD): %m");
229 * Find out which interface we were given.
231 if (ioctl(fd, PPPIOCGUNIT, &ifunit) < 0) {
232 syslog(LOG_ERR, "ioctl(PPPIOCGUNIT): %m");
237 * Check that we got the same unit again.
239 if (ioctl(fd, PPPIOCGUNIT, &x) < 0) {
240 syslog(LOG_ERR, "ioctl(PPPIOCGUNIT): %m");
244 syslog(LOG_ERR, "transfer_ppp failed: wanted unit %d, got %d",
249 ioctl(loop_slave, TIOCSETD, &x);
255 * Enable debug in the driver if requested.
258 if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
259 syslog(LOG_WARNING, "ioctl (PPPIOCGFLAGS): %m");
261 x |= (kdebugflag & 0xFF) * SC_DEBUG;
262 if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
263 syslog(LOG_WARNING, "ioctl(PPPIOCSFLAGS): %m");
268 * Set device for non-blocking reads.
270 if ((initfdflags = fcntl(fd, F_GETFL)) == -1
271 || fcntl(fd, F_SETFL, initfdflags | O_NONBLOCK) == -1) {
272 syslog(LOG_WARNING, "Couldn't set device to non-blocking mode: %m");
277 * restore_loop - reattach the ppp unit to the loopback.
285 * Transfer the ppp interface back to the loopback.
287 if (ioctl(ppp_fd, PPPIOCXFERUNIT, 0) < 0) {
288 syslog(LOG_ERR, "ioctl(transfer ppp unit): %m");
292 if (ioctl(loop_slave, TIOCSETD, &x) < 0) {
293 syslog(LOG_ERR, "ioctl(TIOCSETD): %m");
298 * Check that we got the same unit again.
300 if (ioctl(loop_slave, PPPIOCGUNIT, &x) < 0) {
301 syslog(LOG_ERR, "ioctl(PPPIOCGUNIT): %m");
305 syslog(LOG_ERR, "transfer_ppp failed: wanted unit %d, got %d",
314 * disestablish_ppp - Restore the serial port to normal operation.
315 * This shouldn't call die() because it's called from die().
318 disestablish_ppp(int fd)
320 /* Reset non-blocking mode on fd. */
321 if (initfdflags != -1 && fcntl(fd, F_SETFL, initfdflags) < 0)
322 syslog(LOG_WARNING, "Couldn't restore device fd flags: %m");
325 /* Restore old line discipline. */
326 if (initdisc >= 0 && ioctl(fd, TIOCSETD, &initdisc) < 0)
327 syslog(LOG_ERR, "ioctl(TIOCSETD): %m");
335 * Check whether the link seems not to be 8-bit clean.
343 if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) == 0) {
345 switch (~x & (SC_RCV_B7_0|SC_RCV_B7_1|SC_RCV_EVNP|SC_RCV_ODDP)) {
347 s = "bit 7 set to 1";
350 s = "bit 7 set to 0";
360 syslog(LOG_WARNING, "Serial link is not 8-bit clean:");
361 syslog(LOG_WARNING, "All received characters had %s", s);
367 * set_up_tty: Set up the serial port on `fd' for 8 bits, no parity,
368 * at the requested speed, etc. If `local' is true, set CLOCAL
369 * regardless of whether the modem option was specified.
371 * For *BSD, we assume that speed_t values numerically equal bits/second.
374 set_up_tty(int fd, int local)
378 if (tcgetattr(fd, &tios) < 0) {
379 syslog(LOG_ERR, "tcgetattr: %m");
385 ioctl(fd, TIOCGWINSZ, &wsinfo);
388 tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL);
389 if (crtscts > 0 && !local)
390 tios.c_cflag |= CRTSCTS;
391 else if (crtscts < 0)
392 tios.c_cflag &= ~CRTSCTS;
394 tios.c_cflag |= CS8 | CREAD | HUPCL;
396 tios.c_cflag |= CLOCAL;
397 tios.c_iflag = IGNBRK | IGNPAR;
401 tios.c_cc[VTIME] = 0;
404 tios.c_iflag |= IXON | IXOFF;
405 tios.c_cc[VSTOP] = 0x13; /* DC3 = XOFF = ^S */
406 tios.c_cc[VSTART] = 0x11; /* DC1 = XON = ^Q */
410 cfsetospeed(&tios, inspeed);
411 cfsetispeed(&tios, inspeed);
413 inspeed = cfgetospeed(&tios);
415 * We can't proceed if the serial port speed is 0,
416 * since that implies that the serial port is disabled.
419 syslog(LOG_ERR, "Baud rate for %s is 0; need explicit baud rate",
426 if (tcsetattr(fd, TCSAFLUSH, &tios) < 0) {
427 syslog(LOG_ERR, "tcsetattr: %m");
435 * restore_tty - restore the terminal to the saved settings.
441 if (!default_device) {
443 * Turn off echoing, because otherwise we can get into
444 * a loop with the tty and the modem echoing to each other.
445 * We presume we are the sole user of this tty device, so
446 * when we close it, it will revert to its defaults anyway.
448 inittermios.c_lflag &= ~(ECHO | ECHONL);
450 if (tcsetattr(fd, TCSAFLUSH, &inittermios) < 0)
452 syslog(LOG_WARNING, "tcsetattr: %m");
453 ioctl(fd, TIOCSWINSZ, &wsinfo);
459 * setdtr - control the DTR line on the serial port.
460 * This is called from die(), so it shouldn't call die().
463 setdtr(int fd, int on)
465 int modembits = TIOCM_DTR;
467 ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits);
472 * open_ppp_loopback - open the device we use for getting
473 * packets in demand mode, and connect it to a ppp interface.
477 open_ppp_loopback(void)
481 int pppdisc = PPPDISC;
483 if (openpty(&loop_master, &loop_slave, loop_name, NULL, NULL) < 0) {
484 syslog(LOG_ERR, "No free pty for loopback");
487 SYSDEBUG((LOG_DEBUG, "using %s for loopback", loop_name));
489 if (tcgetattr(loop_slave, &tios) == 0) {
490 tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB);
491 tios.c_cflag |= CS8 | CREAD;
492 tios.c_iflag = IGNPAR;
495 if (tcsetattr(loop_slave, TCSAFLUSH, &tios) < 0)
496 syslog(LOG_WARNING, "couldn't set attributes on loopback: %m");
499 if ((flags = fcntl(loop_master, F_GETFL)) != -1)
500 if (fcntl(loop_master, F_SETFL, flags | O_NONBLOCK) == -1)
501 syslog(LOG_WARNING, "couldn't set loopback to nonblock: %m");
504 if (ioctl(ppp_fd, TIOCSETD, &pppdisc) < 0) {
505 syslog(LOG_ERR, "ioctl(TIOCSETD): %m");
510 * Find out which interface we were given.
512 if (ioctl(ppp_fd, PPPIOCGUNIT, &ifunit) < 0) {
513 syslog(LOG_ERR, "ioctl(PPPIOCGUNIT): %m");
518 * Enable debug in the driver if requested.
521 if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &flags) < 0) {
522 syslog(LOG_WARNING, "ioctl (PPPIOCGFLAGS): %m");
524 flags |= (kdebugflag & 0xFF) * SC_DEBUG;
525 if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &flags) < 0)
526 syslog(LOG_WARNING, "ioctl(PPPIOCSFLAGS): %m");
534 * output - Output PPP packet.
537 output(int unit, u_char *p, int len)
540 log_packet(p, len, "sent ", LOG_DEBUG);
542 if (write(ttyfd, p, len) < 0) {
544 syslog(LOG_ERR, "write: %m");
550 * wait_input - wait until there is data available on ttyfd,
551 * for the length of time specified by *timo (indefinite
555 wait_input(struct timeval *timo)
560 if (ttyfd >= FD_SETSIZE) {
561 syslog(LOG_ERR, "descriptor too big");
565 FD_SET(ttyfd, &ready);
566 n = select(ttyfd+1, &ready, NULL, &ready, timo);
567 if (n < 0 && errno != EINTR) {
568 syslog(LOG_ERR, "select: %m");
575 * wait_loop_output - wait until there is data available on the
576 * loopback, for the length of time specified by *timo (indefinite
580 wait_loop_output(struct timeval *timo)
585 if (loop_master >= FD_SETSIZE) {
586 syslog(LOG_ERR, "descriptor too big");
590 FD_SET(loop_master, &ready);
591 n = select(loop_master + 1, &ready, NULL, &ready, timo);
592 if (n < 0 && errno != EINTR) {
593 syslog(LOG_ERR, "select: %m");
600 * wait_time - wait for a given length of time or until a
601 * signal is received.
604 wait_time(struct timeval *timo)
608 n = select(0, NULL, NULL, NULL, timo);
609 if (n < 0 && errno != EINTR) {
610 syslog(LOG_ERR, "select: %m");
617 * read_packet - get a PPP packet from the serial device.
620 read_packet(u_char *buf)
624 if ((len = read(ttyfd, buf, PPP_MTU + PPP_HDRLEN)) < 0) {
625 if (errno == EWOULDBLOCK || errno == EINTR)
627 syslog(LOG_ERR, "read: %m");
635 * get_loop_output - read characters from the loopback, form them
636 * into frames, and detect when we want to bring the real link up.
637 * Return value is 1 if we need to bring up the link, 0 otherwise.
640 get_loop_output(void)
645 while ((n = read(loop_master, inbuf, sizeof(inbuf))) >= 0) {
646 if (loop_chars(inbuf, n))
651 syslog(LOG_ERR, "eof on loopback");
653 } else if (errno != EWOULDBLOCK){
654 syslog(LOG_ERR, "read from loopback: %m");
663 * ppp_send_config - configure the transmit characteristics of
667 ppp_send_config(int unit, int mtu, u_int32_t asyncmap, int pcomp, int accomp)
672 strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
674 if (ioctl(sockfd, SIOCSIFMTU, (caddr_t) &ifr) < 0) {
675 syslog(LOG_ERR, "ioctl(SIOCSIFMTU): %m");
679 if (ioctl(ppp_fd, PPPIOCSASYNCMAP, (caddr_t) &asyncmap) < 0) {
680 syslog(LOG_ERR, "ioctl(PPPIOCSASYNCMAP): %m");
684 if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
685 syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m");
688 x = pcomp? x | SC_COMP_PROT: x &~ SC_COMP_PROT;
689 x = accomp? x | SC_COMP_AC: x &~ SC_COMP_AC;
690 if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
691 syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
698 * ppp_set_xaccm - set the extended transmit ACCM for the interface.
701 ppp_set_xaccm(int unit, ext_accm accm)
703 if (ioctl(ppp_fd, PPPIOCSXASYNCMAP, accm) < 0 && errno != ENOTTY)
704 syslog(LOG_WARNING, "ioctl(set extended ACCM): %m");
709 * ppp_recv_config - configure the receive-side characteristics of
713 ppp_recv_config(int unit, int mru, u_int32_t asyncmap, int pcomp, int accomp)
717 if (ioctl(ppp_fd, PPPIOCSMRU, (caddr_t) &mru) < 0) {
718 syslog(LOG_ERR, "ioctl(PPPIOCSMRU): %m");
721 if (ioctl(ppp_fd, PPPIOCSRASYNCMAP, (caddr_t) &asyncmap) < 0) {
722 syslog(LOG_ERR, "ioctl(PPPIOCSRASYNCMAP): %m");
725 if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
726 syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m");
729 x = !accomp? x | SC_REJ_COMP_AC: x &~ SC_REJ_COMP_AC;
730 if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
731 syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
737 * ccp_test - ask kernel whether a given compression method
738 * is acceptable for use. Returns 1 if the method and parameters
739 * are OK, 0 if the method is known but the parameters are not OK
740 * (e.g. code size should be reduced), or -1 if the method is unknown.
743 ccp_test(int unit, u_char *opt_ptr, int opt_len, int 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(int unit, int isopen, int isup)
763 if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
764 syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m");
767 x = isopen? x | SC_CCP_OPEN: x &~ SC_CCP_OPEN;
768 x = isup? x | SC_CCP_UP: x &~ SC_CCP_UP;
769 if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
770 syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
774 * ccp_fatal_error - returns 1 if decompression was disabled as a
775 * result of an error detected after decompression of a packet,
776 * 0 otherwise. This is necessary because of patent nonsense.
779 ccp_fatal_error(int unit)
783 if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
784 syslog(LOG_ERR, "ioctl(PPPIOCGFLAGS): %m");
787 return x & SC_DC_FERROR;
791 * get_idle_time - return how long the link has been idle.
794 get_idle_time(int u, struct ppp_idle *ip)
796 return ioctl(ppp_fd, PPPIOCGIDLE, ip) >= 0;
802 * set_filters - transfer the pass and active filters to the kernel.
805 set_filters(struct bpf_program *pass, struct bpf_program *active)
809 if (pass->bf_len > 0) {
810 if (ioctl(ppp_fd, PPPIOCSPASS, pass) < 0) {
811 syslog(LOG_ERR, "Couldn't set pass-filter in kernel: %m");
815 if (active->bf_len > 0) {
816 if (ioctl(ppp_fd, PPPIOCSACTIVE, active) < 0) {
817 syslog(LOG_ERR, "Couldn't set active-filter in kernel: %m");
826 * sifvjcomp - config tcp header compression
829 sifvjcomp(int u, int vjcomp, int cidcomp, int maxcid)
833 if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
834 syslog(LOG_ERR, "ioctl (PPPIOCGFLAGS): %m");
837 x = vjcomp ? x | SC_COMP_TCP: x &~ SC_COMP_TCP;
838 x = cidcomp? x & ~SC_NO_TCP_CCID: x | SC_NO_TCP_CCID;
839 if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
840 syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
843 if (vjcomp && ioctl(ppp_fd, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0) {
844 syslog(LOG_ERR, "ioctl(PPPIOCSFLAGS): %m");
851 * sifup - Config the interface up and enable IP packets to pass.
858 strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
859 if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
860 syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m");
863 ifr.ifr_flags |= IFF_UP;
864 if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
865 syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
873 * sifnpmode - Set the mode for handling packets for a given NP.
876 sifnpmode(int u, int proto, enum NPmode mode)
880 npi.protocol = proto;
882 if (ioctl(ppp_fd, PPPIOCSNPMODE, &npi) < 0) {
883 syslog(LOG_ERR, "ioctl(set NP %d mode to %d): %m", proto, mode);
890 * sifdown - Config the interface down and disable IP.
900 npi.protocol = PPP_IP;
901 npi.mode = NPMODE_ERROR;
902 ioctl(ppp_fd, PPPIOCSNPMODE, (caddr_t) &npi);
903 /* ignore errors, because ppp_fd might have been closed by now. */
905 strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
906 if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
907 syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m");
910 ifr.ifr_flags &= ~IFF_UP;
911 if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
912 syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
921 * SET_SA_FAMILY - set the sa_family field of a struct sockaddr,
924 #define SET_SA_FAMILY(addr, family) \
925 BZERO((char *) &(addr), sizeof(addr)); \
926 addr.sa_family = (family); \
927 addr.sa_len = sizeof(addr);
930 * sifaddr - Config the interface IP addresses and netmask.
933 sifaddr(int u, u_int32_t o, u_int32_t h, u_int32_t m)
935 struct ifaliasreq ifra;
938 strncpy(ifra.ifra_name, ifname, sizeof(ifra.ifra_name));
939 SET_SA_FAMILY(ifra.ifra_addr, AF_INET);
940 ((struct sockaddr_in *) &ifra.ifra_addr)->sin_addr.s_addr = o;
941 SET_SA_FAMILY(ifra.ifra_broadaddr, AF_INET);
942 ((struct sockaddr_in *) &ifra.ifra_broadaddr)->sin_addr.s_addr = h;
944 SET_SA_FAMILY(ifra.ifra_mask, AF_INET);
945 ((struct sockaddr_in *) &ifra.ifra_mask)->sin_addr.s_addr = m;
947 BZERO(&ifra.ifra_mask, sizeof(ifra.ifra_mask));
948 BZERO(&ifr, sizeof(ifr));
949 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
950 if (ioctl(sockfd, SIOCDIFADDR, (caddr_t) &ifr) < 0) {
951 if (errno != EADDRNOTAVAIL)
952 syslog(LOG_WARNING, "Couldn't remove interface address: %m");
954 if (ioctl(sockfd, SIOCAIFADDR, (caddr_t) &ifra) < 0) {
955 if (errno != EEXIST) {
956 syslog(LOG_ERR, "Couldn't set interface address: %m");
960 "Couldn't set interface address: Address %s already exists",
969 * cifaddr - Clear the interface IP addresses, and delete routes
970 * through the interface if possible.
973 cifaddr(int u, u_int32_t o, u_int32_t h)
975 struct ifaliasreq ifra;
978 strncpy(ifra.ifra_name, ifname, sizeof(ifra.ifra_name));
979 SET_SA_FAMILY(ifra.ifra_addr, AF_INET);
980 ((struct sockaddr_in *) &ifra.ifra_addr)->sin_addr.s_addr = o;
981 SET_SA_FAMILY(ifra.ifra_broadaddr, AF_INET);
982 ((struct sockaddr_in *) &ifra.ifra_broadaddr)->sin_addr.s_addr = h;
983 BZERO(&ifra.ifra_mask, sizeof(ifra.ifra_mask));
984 if (ioctl(sockfd, SIOCDIFADDR, (caddr_t) &ifra) < 0) {
985 if (errno != EADDRNOTAVAIL)
986 syslog(LOG_WARNING, "Couldn't delete interface address: %m");
993 * sifdefaultroute - assign a default route through the address given.
996 sifdefaultroute(int u, u_int32_t l, u_int32_t g)
998 return dodefaultroute(g, 's');
1002 * cifdefaultroute - delete a default route through the address given.
1005 cifdefaultroute(int u, u_int32_t l, u_int32_t g)
1007 return dodefaultroute(g, 'c');
1011 * dodefaultroute - talk to a routing socket to add/delete a default route.
1014 dodefaultroute(u_int32_t g, int cmd)
1018 struct rt_msghdr hdr;
1019 struct sockaddr_in dst;
1020 struct sockaddr_in gway;
1021 struct sockaddr_in mask;
1024 if ((routes = socket(PF_ROUTE, SOCK_RAW, AF_INET)) < 0) {
1025 syslog(LOG_ERR, "Couldn't %s default route: socket: %m",
1026 cmd=='s'? "add": "delete");
1030 memset(&rtmsg, 0, sizeof(rtmsg));
1031 rtmsg.hdr.rtm_type = cmd == 's'? RTM_ADD: RTM_DELETE;
1032 rtmsg.hdr.rtm_flags = RTF_UP | RTF_GATEWAY | RTF_STATIC;
1033 rtmsg.hdr.rtm_version = RTM_VERSION;
1034 rtmsg.hdr.rtm_seq = ++rtm_seq;
1035 rtmsg.hdr.rtm_addrs = RTA_DST | RTA_GATEWAY | RTA_NETMASK;
1036 rtmsg.dst.sin_len = sizeof(rtmsg.dst);
1037 rtmsg.dst.sin_family = AF_INET;
1038 rtmsg.gway.sin_len = sizeof(rtmsg.gway);
1039 rtmsg.gway.sin_family = AF_INET;
1040 rtmsg.gway.sin_addr.s_addr = g;
1041 rtmsg.mask.sin_len = sizeof(rtmsg.dst);
1042 rtmsg.mask.sin_family = AF_INET;
1044 rtmsg.hdr.rtm_msglen = sizeof(rtmsg);
1045 if (write(routes, &rtmsg, sizeof(rtmsg)) < 0) {
1046 syslog(LOG_ERR, "Couldn't %s default route: %m",
1047 cmd=='s'? "add": "delete");
1053 default_route_gateway = (cmd == 's')? g: 0;
1057 #if RTM_VERSION >= 3
1060 * sifproxyarp - Make a proxy ARP entry for the peer.
1063 struct rt_msghdr hdr;
1064 struct sockaddr_inarp dst;
1065 struct sockaddr_dl hwa;
1069 static int arpmsg_valid;
1072 sifproxyarp(int unit, u_int32_t hisaddr)
1077 * Get the hardware address of an interface on the same subnet
1078 * as our local address.
1080 memset(&arpmsg, 0, sizeof(arpmsg));
1081 if (!get_ether_addr(hisaddr, &arpmsg.hwa)) {
1082 syslog(LOG_ERR, "Cannot determine ethernet address for proxy ARP");
1086 if ((routes = socket(PF_ROUTE, SOCK_RAW, AF_INET)) < 0) {
1087 syslog(LOG_ERR, "Couldn't add proxy arp entry: socket: %m");
1091 arpmsg.hdr.rtm_type = RTM_ADD;
1092 arpmsg.hdr.rtm_flags = RTF_ANNOUNCE | RTF_HOST | RTF_STATIC;
1093 arpmsg.hdr.rtm_version = RTM_VERSION;
1094 arpmsg.hdr.rtm_seq = ++rtm_seq;
1095 arpmsg.hdr.rtm_addrs = RTA_DST | RTA_GATEWAY;
1096 arpmsg.hdr.rtm_inits = RTV_EXPIRE;
1097 arpmsg.dst.sin_len = sizeof(struct sockaddr_inarp);
1098 arpmsg.dst.sin_family = AF_INET;
1099 arpmsg.dst.sin_addr.s_addr = hisaddr;
1100 arpmsg.dst.sin_other = SIN_PROXY;
1102 arpmsg.hdr.rtm_msglen = (char *) &arpmsg.hwa - (char *) &arpmsg
1103 + arpmsg.hwa.sdl_len;
1104 if (write(routes, &arpmsg, arpmsg.hdr.rtm_msglen) < 0) {
1105 syslog(LOG_ERR, "Couldn't add proxy arp entry: %m");
1112 proxy_arp_addr = hisaddr;
1117 * cifproxyarp - Delete the proxy ARP entry for the peer.
1120 cifproxyarp(int unit, u_int32_t hisaddr)
1128 arpmsg.hdr.rtm_type = RTM_DELETE;
1129 arpmsg.hdr.rtm_seq = ++rtm_seq;
1131 if ((routes = socket(PF_ROUTE, SOCK_RAW, AF_INET)) < 0) {
1132 syslog(LOG_ERR, "Couldn't delete proxy arp entry: socket: %m");
1136 if (write(routes, &arpmsg, arpmsg.hdr.rtm_msglen) < 0) {
1137 syslog(LOG_ERR, "Couldn't delete proxy arp entry: %m");
1147 #else /* RTM_VERSION */
1150 * sifproxyarp - Make a proxy ARP entry for the peer.
1153 sifproxyarp(int unit, u_int32_t hisaddr)
1155 struct arpreq arpreq;
1157 struct sockaddr_dl sdl;
1161 BZERO(&arpreq, sizeof(arpreq));
1164 * Get the hardware address of an interface on the same subnet
1165 * as our local address.
1167 if (!get_ether_addr(hisaddr, &dls.sdl)) {
1168 syslog(LOG_ERR, "Cannot determine ethernet address for proxy ARP");
1172 arpreq.arp_ha.sa_len = sizeof(struct sockaddr);
1173 arpreq.arp_ha.sa_family = AF_UNSPEC;
1174 BCOPY(LLADDR(&dls.sdl), arpreq.arp_ha.sa_data, dls.sdl.sdl_alen);
1175 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
1176 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
1177 arpreq.arp_flags = ATF_PERM | ATF_PUBL;
1178 if (ioctl(sockfd, SIOCSARP, (caddr_t)&arpreq) < 0) {
1179 syslog(LOG_ERR, "Couldn't add proxy arp entry: %m");
1183 proxy_arp_addr = hisaddr;
1188 * cifproxyarp - Delete the proxy ARP entry for the peer.
1191 cifproxyarp(int unit, u_int32_t hisaddr)
1193 struct arpreq arpreq;
1195 BZERO(&arpreq, sizeof(arpreq));
1196 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
1197 ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
1198 if (ioctl(sockfd, SIOCDARP, (caddr_t)&arpreq) < 0) {
1199 syslog(LOG_WARNING, "Couldn't delete proxy arp entry: %m");
1205 #endif /* RTM_VERSION */
1208 /********************************************************************
1210 * sipxfaddr - Config the interface IPX networknumber
1214 sipxfaddr(int unit, unsigned long int network, unsigned char *node)
1219 struct sockaddr_ipx ipx_addr;
1221 struct sockaddr_ipx *sipx = (struct sockaddr_ipx *) &ifr.ifr_addr;
1222 union ipx_net_u net;
1224 skfd = socket (AF_IPX, SOCK_DGRAM, 0);
1227 syslog (LOG_DEBUG, "socket(AF_IPX): %m(%d)", errno);
1232 memset (&ifr, '\0', sizeof (ifr));
1233 strcpy (ifr.ifr_name, ifname);
1235 memcpy (sipx->sipx_addr.x_host.c_host, node, 6);
1236 sipx->sipx_len = sizeof(sipx);
1237 sipx->sipx_family = AF_IPX;
1238 sipx->sipx_port = 0;
1239 memset(&net, 0, sizeof(net));
1240 net.long_e = htonl (network);
1241 sipx->sipx_addr.x_net = net.net_e;
1243 * Set the IPX device
1245 if (ioctl(skfd, SIOCSIFADDR, (caddr_t) &ifr) < 0)
1248 if (errno != EEXIST)
1251 "ioctl(SIOCAIFADDR, CRTITF): %m(%d)", errno);
1255 syslog (LOG_WARNING,
1256 "ioctl(SIOCAIFADDR, CRTITF): Address already exists");
1264 /********************************************************************
1266 * cipxfaddr - Clear the information for the IPX network. The IPX routes
1267 * are removed and the device is no longer able to pass IPX
1271 int cipxfaddr(int unit)
1276 struct sockaddr_ipx ipx_addr;
1278 struct sockaddr_ipx *sipx = (struct sockaddr_ipx *) &ifr.ifr_addr;
1280 skfd = socket (AF_IPX, SOCK_DGRAM, 0);
1283 syslog (LOG_DEBUG, "socket(AF_IPX): %m(%d)", errno);
1288 memset (&ifr, '\0', sizeof (ifr));
1289 strcpy (ifr.ifr_name, ifname);
1291 sipx->sipx_len = sizeof(sipx);
1292 sipx->sipx_family = AF_IPX;
1294 * Set the IPX device
1296 if (ioctl(skfd, SIOCSIFADDR, (caddr_t) &ifr) < 0)
1299 "ioctl(SIOCAIFADDR, IPX_DLTITF): %m(%d)", errno);
1309 * get_ether_addr - get the hardware address of an interface on the
1310 * the same subnet as ipaddr.
1315 get_ether_addr(u_int32_t ipaddr, struct sockaddr_dl *hwaddr)
1317 struct ifreq *ifr, *ifend, *ifp;
1318 u_int32_t ina, mask;
1319 struct sockaddr_dl *dla;
1322 struct ifreq ifs[MAX_IFS];
1324 ifc.ifc_len = sizeof(ifs);
1326 if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1327 syslog(LOG_ERR, "ioctl(SIOCGIFCONF): %m");
1332 * Scan through looking for an interface with an Internet
1333 * address on the same subnet as `ipaddr'.
1335 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1336 for (ifr = ifc.ifc_req; ifr < ifend;
1337 ifr = (struct ifreq *) ((char *)&ifr->ifr_addr
1338 + MAX(ifr->ifr_addr.sa_len, sizeof(ifr->ifr_addr)))) {
1339 if (ifr->ifr_addr.sa_family == AF_INET) {
1340 ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
1341 strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1343 * Check that the interface is up, and not point-to-point
1346 if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1348 if ((ifreq.ifr_flags &
1349 (IFF_UP|IFF_BROADCAST|IFF_POINTOPOINT|IFF_LOOPBACK|IFF_NOARP))
1350 != (IFF_UP|IFF_BROADCAST))
1353 * Get its netmask and check that it's on the right subnet.
1355 if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1357 mask = ((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr.s_addr;
1358 if ((ipaddr & mask) != (ina & mask))
1367 syslog(LOG_INFO, "found interface %s for proxy arp", ifr->ifr_name);
1370 * Now scan through again looking for a link-level address
1371 * for this interface.
1374 for (ifr = ifc.ifc_req; ifr < ifend; ) {
1375 if (strcmp(ifp->ifr_name, ifr->ifr_name) == 0
1376 && ifr->ifr_addr.sa_family == AF_LINK) {
1378 * Found the link-level address - copy it out
1380 dla = (struct sockaddr_dl *) &ifr->ifr_addr;
1381 BCOPY(dla, hwaddr, dla->sdl_len);
1384 ifr = (struct ifreq *) ((char *)&ifr->ifr_addr
1385 + MAX(ifr->ifr_addr.sa_len, sizeof(ifr->ifr_addr)));
1392 * Return user specified netmask, modified by any mask we might determine
1393 * for address `addr' (in network byte order).
1394 * Here we scan through the system's list of interfaces, looking for
1395 * any non-point-to-point interfaces which might appear to be on the same
1396 * network as `addr'. If we find any, we OR in their netmask to the
1397 * user-specified netmask.
1400 GetMask(u_int32_t addr)
1402 u_int32_t mask, nmask, ina;
1403 struct ifreq *ifr, *ifend, ifreq;
1405 struct ifreq ifs[MAX_IFS];
1408 if (IN_CLASSA(addr)) /* determine network mask for address class */
1409 nmask = IN_CLASSA_NET;
1410 else if (IN_CLASSB(addr))
1411 nmask = IN_CLASSB_NET;
1413 nmask = IN_CLASSC_NET;
1414 /* class D nets are disallowed by bad_ip_adrs */
1415 mask = netmask | htonl(nmask);
1418 * Scan through the system's network interfaces.
1420 ifc.ifc_len = sizeof(ifs);
1422 if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1423 syslog(LOG_WARNING, "ioctl(SIOCGIFCONF): %m");
1426 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1427 for (ifr = ifc.ifc_req; ifr < ifend;
1428 ifr = (struct ifreq *) ((char *)&ifr->ifr_addr
1429 + MAX(ifr->ifr_addr.sa_len, sizeof(ifr->ifr_addr)))) {
1431 * Check the interface's internet address.
1433 if (ifr->ifr_addr.sa_family != AF_INET)
1435 ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
1436 if ((ntohl(ina) & nmask) != (addr & nmask))
1439 * Check that the interface is up, and not point-to-point or loopback.
1441 strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1442 if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1444 if ((ifreq.ifr_flags & (IFF_UP|IFF_POINTOPOINT|IFF_LOOPBACK))
1448 * Get its netmask and OR it into our mask.
1450 if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1452 mask |= ((struct sockaddr_in *)&ifreq.ifr_addr)->sin_addr.s_addr;
1459 * Use the hostid as part of the random number seed.
1468 * lock - create a lock file for the named lock device
1470 #define LOCK_PREFIX "/var/spool/lock/LCK.."
1475 char hdb_lock_buffer[12];
1479 if ((p = strrchr(dev, '/')) != NULL)
1481 lock_file = malloc(strlen(LOCK_PREFIX) + strlen(dev) + 1);
1482 if (lock_file == NULL)
1483 novm("lock file name");
1484 strcat(strcpy(lock_file, LOCK_PREFIX), dev);
1486 while ((fd = open(lock_file, O_EXCL | O_CREAT | O_RDWR, 0644)) < 0) {
1488 && (fd = open(lock_file, O_RDONLY, 0)) >= 0) {
1489 /* Read the lock file to find out who has the device locked */
1490 n = read(fd, hdb_lock_buffer, 11);
1492 syslog(LOG_ERR, "Can't read pid from lock file %s", lock_file);
1495 hdb_lock_buffer[n] = 0;
1496 pid = atoi(hdb_lock_buffer);
1497 if (kill(pid, 0) == -1 && errno == ESRCH) {
1498 /* pid no longer exists - remove the lock file */
1499 if (unlink(lock_file) == 0) {
1501 syslog(LOG_NOTICE, "Removed stale lock on %s (pid %d)",
1505 syslog(LOG_WARNING, "Couldn't remove stale lock on %s",
1508 syslog(LOG_NOTICE, "Device %s is locked by pid %d",
1513 syslog(LOG_ERR, "Can't create lock file %s: %m", lock_file);
1519 sprintf(hdb_lock_buffer, "%10d\n", getpid());
1520 write(fd, hdb_lock_buffer, 11);
1527 * unlock - remove our lockfile