2 * sys-linux.c - System-dependent procedures for setting up
3 * PPP interfaces on Linux systems
5 * Copyright (c) 1994-2002 Paul Mackerras. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
19 * 3. The name(s) of the authors of this software must not be used to
20 * endorse or promote products derived from this software without
21 * prior written permission.
23 * 4. Redistributions of any form whatsoever must retain the following
25 * "This product includes software developed by Paul Mackerras
26 * <paulus@samba.org>".
28 * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO
29 * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
30 * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
31 * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
32 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
33 * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
34 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
36 * Derived from main.c and pppd.h, which are:
38 * Copyright (c) 1984-2000 Carnegie Mellon University. All rights reserved.
40 * Redistribution and use in source and binary forms, with or without
41 * modification, are permitted provided that the following conditions
44 * 1. Redistributions of source code must retain the above copyright
45 * notice, this list of conditions and the following disclaimer.
47 * 2. Redistributions in binary form must reproduce the above copyright
48 * notice, this list of conditions and the following disclaimer in
49 * the documentation and/or other materials provided with the
52 * 3. The name "Carnegie Mellon University" must not be used to
53 * endorse or promote products derived from this software without
54 * prior written permission. For permission or any legal
55 * details, please contact
56 * Office of Technology Transfer
57 * Carnegie Mellon University
59 * Pittsburgh, PA 15213-3890
60 * (412) 268-4387, fax: (412) 268-7395
61 * tech-transfer@andrew.cmu.edu
63 * 4. Redistributions of any form whatsoever must retain the following
65 * "This product includes software developed by Computing Services
66 * at Carnegie Mellon University (http://www.cmu.edu/computing/)."
68 * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO
69 * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
70 * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE
71 * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
72 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
73 * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
74 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
77 #include <sys/ioctl.h>
78 #include <sys/types.h>
79 #include <sys/socket.h>
81 #include <sys/errno.h>
84 #include <sys/utsname.h>
85 #include <sys/sysmacros.h>
101 /* This is in netdevice.h. However, this compile will fail miserably if
102 you attempt to include netdevice.h because it has so many references
103 to __memcpy functions which it should not attempt to do. So, since I
104 really don't use it, but it must be defined, define it now. */
107 #define MAX_ADDR_LEN 7
111 #include <asm/types.h> /* glibc 2 conflicts with linux/types.h */
113 #include <net/if_arp.h>
114 #include <net/route.h>
115 #include <netinet/if_ether.h>
117 #include <linux/types.h>
118 #include <linux/if.h>
119 #include <linux/if_arp.h>
120 #include <linux/route.h>
121 #include <linux/if_ether.h>
123 #include <netinet/in.h>
124 #include <arpa/inet.h>
126 #include <linux/ppp_defs.h>
127 #include <linux/if_ppp.h>
135 #if __GLIBC__ >= 2 && \
136 !(defined(__powerpc__) && __GLIBC__ == 2 && __GLIBC_MINOR__ == 0)
137 #include <netipx/ipx.h>
139 #include <linux/ipx.h>
141 #endif /* IPX_CHANGE */
145 #include <linux/filter.h>
146 #endif /* PPP_FILTER */
149 #include <sys/locks.h>
155 * This is in linux/include/net/ipv6.h.
159 struct in6_addr ifr6_addr;
160 __u32 ifr6_prefixlen;
161 unsigned int ifr6_ifindex;
165 #define IN6_LLADDR_FROM_EUI64(sin6, eui64) do { \
166 memset(&sin6.s6_addr, 0, sizeof(struct in6_addr)); \
167 sin6.s6_addr16[0] = htons(0xfe80); \
168 eui64_copy(eui64, sin6.s6_addr32[2]); \
173 /* We can get an EIO error on an ioctl if the modem has hung up */
174 #define ok_error(num) ((num)==EIO)
176 static int tty_disc = N_TTY; /* The TTY discipline */
177 static int ppp_disc = N_PPP; /* The PPP discpline */
178 static int initfdflags = -1; /* Initial file descriptor flags for fd */
179 static int ppp_fd = -1; /* fd which is set to PPP discipline */
180 static int sock_fd = -1; /* socket for doing interface ioctls */
181 static int slave_fd = -1;
182 static int master_fd = -1;
184 static int sock6_fd = -1;
186 int ppp_dev_fd = -1; /* fd for /dev/ppp (new style driver) */
187 static int chindex; /* channel index (new style driver) */
189 static fd_set in_fds; /* set of fds that wait_input waits for */
190 static int max_in_fd; /* highest fd set in in_fds */
192 static int has_proxy_arp = 0;
193 static int driver_version = 0;
194 static int driver_modification = 0;
195 static int driver_patch = 0;
196 static int driver_is_old = 0;
197 static int restore_term = 0; /* 1 => we've munged the terminal */
198 static struct termios inittermios; /* Initial TTY termios */
200 int new_style_driver = 0;
202 static char loop_name[20];
203 static unsigned char inbuf[512]; /* buffer for chars read from loopback */
205 static int if_is_up; /* Interface has been marked up */
206 static u_int32_t default_route_gateway; /* Gateway for default route added */
207 static u_int32_t proxy_arp_addr; /* Addr for proxy arp entry added */
208 static char proxy_arp_dev[16]; /* Device for proxy arp entry */
209 static u_int32_t our_old_addr; /* for detecting address changes */
210 static int dynaddr_set; /* 1 if ip_dynaddr set */
211 static int looped; /* 1 if using loop */
212 static int link_mtu; /* mtu for the link (not bundle) */
214 static struct utsname utsname; /* for the kernel version */
215 static int kernel_version;
216 #define KVERSION(j,n,p) ((j)*1000000 + (n)*1000 + (p))
220 #define FLAGS_GOOD (IFF_UP | IFF_BROADCAST)
221 #define FLAGS_MASK (IFF_UP | IFF_BROADCAST | \
222 IFF_POINTOPOINT | IFF_LOOPBACK | IFF_NOARP)
224 #define SIN_ADDR(x) (((struct sockaddr_in *) (&(x)))->sin_addr.s_addr)
226 /* Prototypes for procedures local to this file. */
227 static int get_flags (int fd);
228 static void set_flags (int fd, int flags);
229 static int translate_speed (int bps);
230 static int baud_rate_of (int speed);
231 static void close_route_table (void);
232 static int open_route_table (void);
233 static int read_route_table (struct rtentry *rt);
234 static int defaultroute_exists (struct rtentry *rt);
235 static int get_ether_addr (u_int32_t ipaddr, struct sockaddr *hwaddr,
236 char *name, int namelen);
237 static void decode_version (char *buf, int *version, int *mod, int *patch);
238 static int set_kdebugflag(int level);
239 static int ppp_registered(void);
240 static int make_ppp_unit(void);
242 extern u_char inpacket_buf[]; /* borrowed from main.c */
245 * SET_SA_FAMILY - set the sa_family field of a struct sockaddr,
249 #define SET_SA_FAMILY(addr, family) \
250 memset ((char *) &(addr), '\0', sizeof(addr)); \
251 addr.sa_family = (family);
254 * Determine if the PPP connection should still be present.
259 /* new_fd is the fd of a tty */
260 static void set_ppp_fd (int new_fd)
262 SYSDEBUG ((LOG_DEBUG, "setting ppp_fd to %d\n", new_fd));
264 if (!new_style_driver)
268 static int still_ppp(void)
270 if (new_style_driver)
271 return !hungup && ppp_fd >= 0;
272 if (!hungup || ppp_fd == slave_fd)
275 set_ppp_fd(slave_fd);
281 /********************************************************************
283 * Functions to read and set the flags value in the device driver
286 static int get_flags (int fd)
290 if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &flags) < 0) {
291 if ( ok_error (errno) )
294 fatal("ioctl(PPPIOCGFLAGS): %m (line %d)", __LINE__);
297 SYSDEBUG ((LOG_DEBUG, "get flags = %x\n", flags));
301 /********************************************************************/
303 static void set_flags (int fd, int flags)
305 SYSDEBUG ((LOG_DEBUG, "set flags = %x\n", flags));
307 if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &flags) < 0) {
308 if (! ok_error (errno) )
309 fatal("ioctl(PPPIOCSFLAGS, %x): %m (line %d)", flags, errno, __LINE__);
313 /********************************************************************
315 * sys_init - System-dependent initialization.
322 if (new_style_driver) {
323 ppp_dev_fd = open("/dev/ppp", O_RDWR);
325 fatal("Couldn't open /dev/ppp: %m");
326 flags = fcntl(ppp_dev_fd, F_GETFL);
328 || fcntl(ppp_dev_fd, F_SETFL, flags | O_NONBLOCK) == -1)
329 warn("Couldn't set /dev/ppp to nonblock: %m");
332 /* Get an internet socket for doing socket ioctls. */
333 sock_fd = socket(AF_INET, SOCK_DGRAM, 0);
335 fatal("Couldn't create IP socket: %m(%d)", errno);
338 sock6_fd = socket(AF_INET6, SOCK_DGRAM, 0);
340 sock6_fd = -errno; /* save errno for later */
347 /********************************************************************
349 * sys_cleanup - restore any system state we modified before exiting:
350 * mark the interface down, delete default route and/or proxy arp entry.
351 * This shouldn't call die() because it's called from die().
354 void sys_cleanup(void)
357 * Take down the device
364 * Delete any routes through the device.
366 if (default_route_gateway != 0)
367 cifdefaultroute(0, 0, default_route_gateway);
370 cifproxyarp(0, proxy_arp_addr);
373 /********************************************************************
375 * sys_close - Clean up in a child process before execing.
380 if (new_style_driver)
391 /********************************************************************
393 * set_kdebugflag - Define the debugging level for the kernel
396 static int set_kdebugflag (int requested_level)
398 if (new_style_driver && ifunit < 0)
400 if (ioctl(ppp_dev_fd, PPPIOCSDEBUG, &requested_level) < 0) {
401 if ( ! ok_error (errno) )
402 error("ioctl(PPPIOCSDEBUG): %m (line %d)", __LINE__);
405 SYSDEBUG ((LOG_INFO, "set kernel debugging level to %d",
410 /********************************************************************
412 * tty_establish_ppp - Turn the serial port into a ppp interface.
415 int tty_establish_ppp (int tty_fd)
420 * Ensure that the tty device is in exclusive mode.
422 if (ioctl(tty_fd, TIOCEXCL, 0) < 0) {
423 if ( ! ok_error ( errno ))
424 warn("Couldn't make tty exclusive: %m");
427 * Demand mode - prime the old ppp device to relinquish the unit.
429 if (!new_style_driver && looped
430 && ioctl(slave_fd, PPPIOCXFERUNIT, 0) < 0) {
431 error("ioctl(transfer ppp unit): %m, line %d", __LINE__);
435 * Set the current tty to the PPP discpline
439 #define N_SYNC_PPP 14
441 ppp_disc = (new_style_driver && sync_serial)? N_SYNC_PPP: N_PPP;
442 if (ioctl(tty_fd, TIOCSETD, &ppp_disc) < 0) {
443 if ( ! ok_error (errno) ) {
444 error("Couldn't set tty to PPP discipline: %m");
449 ret_fd = generic_establish_ppp(tty_fd);
451 #define SC_RCVB (SC_RCV_B7_0 | SC_RCV_B7_1 | SC_RCV_EVNP | SC_RCV_ODDP)
452 #define SC_LOGB (SC_DEBUG | SC_LOG_INPKT | SC_LOG_OUTPKT | SC_LOG_RAWIN \
456 set_flags(ppp_fd, ((get_flags(ppp_fd) & ~(SC_RCVB | SC_LOGB))
457 | ((kdebugflag * SC_DEBUG) & SC_LOGB)));
459 if (ioctl(tty_fd, TIOCSETD, &tty_disc) < 0 && !ok_error(errno))
460 warn("Couldn't reset tty to normal line discipline: %m");
466 /********************************************************************
468 * generic_establish_ppp - Turn the fd into a ppp interface.
470 int generic_establish_ppp (int fd)
474 if (new_style_driver) {
475 /* Open another instance of /dev/ppp and connect the channel to it */
478 if (ioctl(fd, PPPIOCGCHAN, &chindex) == -1) {
479 error("Couldn't get channel number: %m");
482 dbglog("using channel %d", chindex);
483 fd = open("/dev/ppp", O_RDWR);
485 error("Couldn't reopen /dev/ppp: %m");
488 if (ioctl(fd, PPPIOCATTCHAN, &chindex) < 0) {
489 error("Couldn't attach to channel %d: %m", chindex);
492 flags = fcntl(fd, F_GETFL);
493 if (flags == -1 || fcntl(fd, F_SETFL, flags | O_NONBLOCK) == -1)
494 warn("Couldn't set /dev/ppp (channel) to nonblock: %m");
499 if (!looped && !multilink) {
501 * Create a new PPP unit.
503 if (make_ppp_unit() < 0)
508 set_flags(ppp_dev_fd, get_flags(ppp_dev_fd) & ~SC_LOOP_TRAFFIC);
512 if (ioctl(fd, PPPIOCCONNECT, &ifunit) < 0) {
513 error("Couldn't attach to PPP unit %d: %m", ifunit);
520 * Old-style driver: find out which interface we were given.
523 if (ioctl(fd, PPPIOCGUNIT, &x) < 0) {
524 if (ok_error (errno))
526 fatal("ioctl(PPPIOCGUNIT): %m (line %d)", __LINE__);
528 /* Check that we got the same unit again. */
529 if (looped && x != ifunit)
530 fatal("transfer_ppp failed: wanted unit %d, got %d", ifunit, x);
534 * Fetch the initial file flags and reset blocking mode on the file.
536 initfdflags = fcntl(fd, F_GETFL);
537 if (initfdflags == -1 ||
538 fcntl(fd, F_SETFL, initfdflags | O_NONBLOCK) == -1) {
539 if ( ! ok_error (errno))
540 warn("Couldn't set device to non-blocking mode: %m");
547 * Enable debug in the driver if requested.
550 set_kdebugflag (kdebugflag);
552 SYSDEBUG ((LOG_NOTICE, "Using version %d.%d.%d of PPP driver",
553 driver_version, driver_modification, driver_patch));
563 /********************************************************************
565 * tty_disestablish_ppp - Restore the serial port to normal operation.
566 * This shouldn't call die() because it's called from die().
569 void tty_disestablish_ppp(int tty_fd)
573 * Flush the tty output buffer so that the TIOCSETD doesn't hang.
575 if (tcflush(tty_fd, TCIOFLUSH) < 0)
577 warn("tcflush failed: %m");
581 * Restore the previous line discipline
583 if (ioctl(tty_fd, TIOCSETD, &tty_disc) < 0) {
584 if ( ! ok_error (errno))
585 error("ioctl(TIOCSETD, N_TTY): %m (line %d)", __LINE__);
588 if (ioctl(tty_fd, TIOCNXCL, 0) < 0) {
589 if ( ! ok_error (errno))
590 warn("ioctl(TIOCNXCL): %m (line %d)", __LINE__);
593 /* Reset non-blocking mode on fd. */
594 if (initfdflags != -1 && fcntl(tty_fd, F_SETFL, initfdflags) < 0) {
595 if ( ! ok_error (errno))
596 warn("Couldn't restore device fd flags: %m");
602 generic_disestablish_ppp(tty_fd);
605 /********************************************************************
607 * generic_disestablish_ppp - Restore device components to normal
608 * operation, and reconnect the ppp unit to the loopback if in demand
609 * mode. This shouldn't call die() because it's called from die().
611 void generic_disestablish_ppp(int dev_fd)
613 if (new_style_driver) {
617 set_flags(ppp_dev_fd, get_flags(ppp_dev_fd) | SC_LOOP_TRAFFIC);
619 } else if (ifunit >= 0 && ioctl(ppp_dev_fd, PPPIOCDETACH) < 0)
620 error("Couldn't release PPP unit: %m");
622 remove_fd(ppp_dev_fd);
624 /* old-style driver */
626 set_ppp_fd(slave_fd);
631 * make_ppp_unit - make a new ppp unit for ppp_dev_fd.
632 * Assumes new_style_driver.
634 static int make_ppp_unit()
639 x = ioctl(ppp_dev_fd, PPPIOCNEWUNIT, &ifunit);
640 if (x < 0 && req_unit >= 0 && errno == EEXIST) {
641 warn("Couldn't allocate PPP unit %d as it is already in use", req_unit);
643 x = ioctl(ppp_dev_fd, PPPIOCNEWUNIT, &ifunit);
646 error("Couldn't create new ppp unit: %m");
651 * cfg_bundle - configure the existing bundle.
652 * Used in demand mode.
654 void cfg_bundle(int mrru, int mtru, int rssn, int tssn)
658 if (!new_style_driver)
661 /* set the mrru, mtu and flags */
662 if (ioctl(ppp_dev_fd, PPPIOCSMRRU, &mrru) < 0)
663 error("Couldn't set MRRU: %m");
664 flags = get_flags(ppp_dev_fd);
665 flags &= ~(SC_MP_SHORTSEQ | SC_MP_XSHORTSEQ);
666 flags |= (rssn? SC_MP_SHORTSEQ: 0) | (tssn? SC_MP_XSHORTSEQ: 0)
667 | (mrru? SC_MULTILINK: 0);
669 set_flags(ppp_dev_fd, flags);
671 /* connect up the channel */
672 if (ioctl(ppp_fd, PPPIOCCONNECT, &ifunit) < 0)
673 fatal("Couldn't attach to PPP unit %d: %m", ifunit);
678 * make_new_bundle - create a new PPP unit (i.e. a bundle)
679 * and connect our channel to it. This should only get called
680 * if `multilink' was set at the time establish_ppp was called.
681 * In demand mode this uses our existing bundle instead of making
684 void make_new_bundle(int mrru, int mtru, int rssn, int tssn)
686 if (!new_style_driver)
689 /* make us a ppp unit */
690 if (make_ppp_unit() < 0)
693 /* set the mrru and flags */
694 cfg_bundle(mrru, mtru, rssn, tssn);
698 * bundle_attach - attach our link to a given PPP unit.
699 * We assume the unit is controlled by another pppd.
701 int bundle_attach(int ifnum)
703 if (!new_style_driver)
706 if (ioctl(ppp_dev_fd, PPPIOCATTACH, &ifnum) < 0) {
708 return 0; /* doesn't still exist */
709 fatal("Couldn't attach to interface unit %d: %m\n", ifnum);
711 if (ioctl(ppp_fd, PPPIOCCONNECT, &ifnum) < 0)
712 fatal("Couldn't connect to interface unit %d: %m", ifnum);
713 set_flags(ppp_dev_fd, get_flags(ppp_dev_fd) | SC_MULTILINK);
719 /********************************************************************
721 * clean_check - Fetch the flags for the device and generate
722 * appropriate error messages.
724 void clean_check(void)
730 if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) == 0) {
732 switch (~x & (SC_RCV_B7_0|SC_RCV_B7_1|SC_RCV_EVNP|SC_RCV_ODDP)) {
734 s = "all had bit 7 set to 1";
738 s = "all had bit 7 set to 0";
742 s = "all had odd parity";
746 s = "all had even parity";
751 warn("Receive serial link is not 8-bit clean:");
752 warn("Problem: %s", s);
760 * List of valid speeds.
764 int speed_int, speed_val;
847 /********************************************************************
849 * Translate from bits/second to a speed_t.
852 static int translate_speed (int bps)
854 struct speed *speedp;
857 for (speedp = speeds; speedp->speed_int; speedp++) {
858 if (bps == speedp->speed_int)
859 return speedp->speed_val;
861 warn("speed %d not supported", bps);
866 /********************************************************************
868 * Translate from a speed_t to bits/second.
871 static int baud_rate_of (int speed)
873 struct speed *speedp;
876 for (speedp = speeds; speedp->speed_int; speedp++) {
877 if (speed == speedp->speed_val)
878 return speedp->speed_int;
884 /********************************************************************
886 * set_up_tty: Set up the serial port on `fd' for 8 bits, no parity,
887 * at the requested speed, etc. If `local' is true, set CLOCAL
888 * regardless of whether the modem option was specified.
891 void set_up_tty(int tty_fd, int local)
897 if (tcgetattr(tty_fd, &tios) < 0) {
898 if (!ok_error(errno))
899 fatal("tcgetattr: %m (line %d)", __LINE__);
906 tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL);
907 tios.c_cflag |= CS8 | CREAD | HUPCL;
909 tios.c_iflag = IGNBRK | IGNPAR;
913 tios.c_cc[VTIME] = 0;
916 tios.c_cflag ^= (CLOCAL | HUPCL);
920 tios.c_cflag |= CRTSCTS;
924 tios.c_iflag |= IXON | IXOFF;
925 tios.c_cc[VSTOP] = 0x13; /* DC3 = XOFF = ^S */
926 tios.c_cc[VSTART] = 0x11; /* DC1 = XON = ^Q */
930 tios.c_cflag &= ~CRTSCTS;
937 speed = translate_speed(inspeed);
939 cfsetospeed (&tios, speed);
940 cfsetispeed (&tios, speed);
943 * We can't proceed if the serial port speed is B0,
944 * since that implies that the serial port is disabled.
947 speed = cfgetospeed(&tios);
949 fatal("Baud rate for %s is 0; need explicit baud rate", devnam);
952 if (tcsetattr(tty_fd, TCSAFLUSH, &tios) < 0)
953 if (!ok_error(errno))
954 fatal("tcsetattr: %m (line %d)", __LINE__);
956 baud_rate = baud_rate_of(speed);
960 /********************************************************************
962 * setdtr - control the DTR line on the serial port.
963 * This is called from die(), so it shouldn't call die().
966 void setdtr (int tty_fd, int on)
968 int modembits = TIOCM_DTR;
970 ioctl(tty_fd, (on ? TIOCMBIS : TIOCMBIC), &modembits);
973 /********************************************************************
975 * restore_tty - restore the terminal to the saved settings.
978 void restore_tty (int tty_fd)
983 * Turn off echoing, because otherwise we can get into
984 * a loop with the tty and the modem echoing to each other.
985 * We presume we are the sole user of this tty device, so
986 * when we close it, it will revert to its defaults anyway.
989 inittermios.c_lflag &= ~(ECHO | ECHONL);
991 if (tcsetattr(tty_fd, TCSAFLUSH, &inittermios) < 0) {
992 if (! ok_error (errno))
993 warn("tcsetattr: %m (line %d)", __LINE__);
998 /********************************************************************
1000 * output - Output PPP packet.
1003 void output (int unit, unsigned char *p, int len)
1008 dump_packet("sent", p, len);
1009 if (snoop_send_hook) snoop_send_hook(p, len);
1011 if (len < PPP_HDRLEN)
1013 if (new_style_driver) {
1016 proto = (p[0] << 8) + p[1];
1017 if (ifunit >= 0 && !(proto >= 0xc000 || proto == PPP_CCPFRAG))
1020 if (write(fd, p, len) < 0) {
1021 if (errno == EWOULDBLOCK || errno == ENOBUFS
1022 || errno == ENXIO || errno == EIO || errno == EINTR)
1023 warn("write: warning: %m (%d)", errno);
1025 error("write: %m (%d)", errno);
1029 /********************************************************************
1031 * wait_input - wait until there is data available,
1032 * for the length of time specified by *timo (indefinite
1036 void wait_input(struct timeval *timo)
1043 n = select(max_in_fd + 1, &ready, NULL, &exc, timo);
1044 if (n < 0 && errno != EINTR)
1045 fatal("select: %m");
1049 * add_fd - add an fd to the set that wait_input waits for.
1053 if (fd >= FD_SETSIZE)
1054 fatal("internal error: file descriptor too large (%d)", fd);
1055 FD_SET(fd, &in_fds);
1061 * remove_fd - remove an fd from the set that wait_input waits for.
1063 void remove_fd(int fd)
1065 FD_CLR(fd, &in_fds);
1069 /********************************************************************
1071 * read_packet - get a PPP packet from the serial device.
1074 int read_packet (unsigned char *buf)
1078 len = PPP_MRU + PPP_HDRLEN;
1079 if (new_style_driver) {
1080 *buf++ = PPP_ALLSTATIONS;
1086 nr = read(ppp_fd, buf, len);
1087 if (nr < 0 && errno != EWOULDBLOCK && errno != EIO && errno != EINTR)
1089 if (nr < 0 && errno == ENXIO)
1092 if (nr < 0 && new_style_driver && ifunit >= 0) {
1093 /* N.B. we read ppp_fd first since LCP packets come in there. */
1094 nr = read(ppp_dev_fd, buf, len);
1095 if (nr < 0 && errno != EWOULDBLOCK && errno != EIO && errno != EINTR)
1096 error("read /dev/ppp: %m");
1097 if (nr < 0 && errno == ENXIO)
1100 return (new_style_driver && nr > 0)? nr+2: nr;
1103 /********************************************************************
1105 * get_loop_output - get outgoing packets from the ppp device,
1106 * and detect when we want to bring the real link up.
1107 * Return value is 1 if we need to bring up the link, 0 otherwise.
1110 get_loop_output(void)
1115 if (new_style_driver) {
1116 while ((n = read_packet(inpacket_buf)) > 0)
1117 if (loop_frame(inpacket_buf, n))
1122 while ((n = read(master_fd, inbuf, sizeof(inbuf))) > 0)
1123 if (loop_chars(inbuf, n))
1127 fatal("eof on loopback");
1129 if (errno != EWOULDBLOCK)
1130 fatal("read from loopback: %m(%d)", errno);
1136 * netif_set_mtu - set the MTU on the PPP network interface.
1139 netif_set_mtu(int unit, int mtu)
1143 SYSDEBUG ((LOG_DEBUG, "netif_set_mtu: mtu = %d\n", mtu));
1145 memset (&ifr, '\0', sizeof (ifr));
1146 strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
1149 if (ifunit >= 0 && ioctl(sock_fd, SIOCSIFMTU, (caddr_t) &ifr) < 0)
1150 error("ioctl(SIOCSIFMTU): %m (line %d)", __LINE__);
1154 * netif_get_mtu - get the MTU on the PPP network interface.
1157 netif_get_mtu(int unit)
1161 memset (&ifr, '\0', sizeof (ifr));
1162 strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
1164 if (ifunit >= 0 && ioctl(sock_fd, SIOCGIFMTU, (caddr_t) &ifr) < 0) {
1165 error("ioctl(SIOCGIFMTU): %m (line %d)", __LINE__);
1171 /********************************************************************
1173 * tty_send_config - configure the transmit characteristics of
1174 * the ppp interface.
1177 void tty_send_config (int mtu,u_int32_t asyncmap,int pcomp,int accomp)
1182 * Set the asyncmap and other parameters for the ppp device
1187 SYSDEBUG ((LOG_DEBUG, "send_config: asyncmap = %lx\n", asyncmap));
1188 if (ioctl(ppp_fd, PPPIOCSASYNCMAP, (caddr_t) &asyncmap) < 0) {
1189 if (!ok_error(errno))
1190 fatal("ioctl(PPPIOCSASYNCMAP): %m (line %d)", __LINE__);
1194 x = get_flags(ppp_fd);
1195 x = pcomp ? x | SC_COMP_PROT : x & ~SC_COMP_PROT;
1196 x = accomp ? x | SC_COMP_AC : x & ~SC_COMP_AC;
1197 x = sync_serial ? x | SC_SYNC : x & ~SC_SYNC;
1198 set_flags(ppp_fd, x);
1201 /********************************************************************
1203 * tty_set_xaccm - set the extended transmit ACCM for the interface.
1206 void tty_set_xaccm (ext_accm accm)
1208 SYSDEBUG ((LOG_DEBUG, "set_xaccm: %08lx %08lx %08lx %08lx\n",
1209 accm[0], accm[1], accm[2], accm[3]));
1213 if (ioctl(ppp_fd, PPPIOCSXASYNCMAP, accm) < 0 && errno != ENOTTY) {
1214 if ( ! ok_error (errno))
1215 warn("ioctl(set extended ACCM): %m (line %d)", __LINE__);
1219 /********************************************************************
1221 * tty_recv_config - configure the receive-side characteristics of
1222 * the ppp interface.
1225 void tty_recv_config (int mru,u_int32_t asyncmap,int pcomp,int accomp)
1227 SYSDEBUG ((LOG_DEBUG, "recv_config: mru = %d\n", mru));
1229 * If we were called because the link has gone down then there is nothing
1230 * which may be done. Just return without incident.
1235 * Set the receiver parameters
1237 if (ioctl(ppp_fd, PPPIOCSMRU, (caddr_t) &mru) < 0) {
1238 if ( ! ok_error (errno))
1239 error("ioctl(PPPIOCSMRU): %m (line %d)", __LINE__);
1241 if (new_style_driver && ifunit >= 0
1242 && ioctl(ppp_dev_fd, PPPIOCSMRU, (caddr_t) &mru) < 0)
1243 error("Couldn't set MRU in generic PPP layer: %m");
1245 SYSDEBUG ((LOG_DEBUG, "recv_config: asyncmap = %lx\n", asyncmap));
1246 if (ioctl(ppp_fd, PPPIOCSRASYNCMAP, (caddr_t) &asyncmap) < 0) {
1247 if (!ok_error(errno))
1248 error("ioctl(PPPIOCSRASYNCMAP): %m (line %d)", __LINE__);
1252 /********************************************************************
1254 * ccp_test - ask kernel whether a given compression method
1255 * is acceptable for use.
1259 ccp_test(int unit, u_char *opt_ptr, int opt_len, int for_transmit)
1261 struct ppp_option_data data;
1263 memset (&data, '\0', sizeof (data));
1265 data.length = opt_len;
1266 data.transmit = for_transmit;
1268 if (ioctl(ppp_dev_fd, PPPIOCSCOMPRESS, (caddr_t) &data) >= 0)
1271 return (errno == ENOBUFS)? 0: -1;
1274 /********************************************************************
1276 * ccp_flags_set - inform kernel about the current state of CCP.
1279 void ccp_flags_set (int unit, int isopen, int isup)
1281 if (still_ppp() && ifunit >= 0) {
1282 int x = get_flags(ppp_dev_fd);
1283 x = isopen? x | SC_CCP_OPEN : x &~ SC_CCP_OPEN;
1284 x = isup? x | SC_CCP_UP : x &~ SC_CCP_UP;
1285 set_flags (ppp_dev_fd, x);
1291 * set_filters - set the active and pass filters in the kernel driver.
1293 int set_filters(struct bpf_program *pass, struct bpf_program *active)
1295 struct sock_fprog fp;
1297 fp.len = pass->bf_len;
1298 fp.filter = (struct sock_filter *) pass->bf_insns;
1299 if (ioctl(ppp_dev_fd, PPPIOCSPASS, &fp) < 0) {
1300 if (errno == ENOTTY)
1301 warn("kernel does not support PPP filtering");
1303 error("Couldn't set pass-filter in kernel: %m");
1306 fp.len = active->bf_len;
1307 fp.filter = (struct sock_filter *) active->bf_insns;
1308 if (ioctl(ppp_dev_fd, PPPIOCSACTIVE, &fp) < 0) {
1309 error("Couldn't set active-filter in kernel: %m");
1314 #endif /* PPP_FILTER */
1316 /********************************************************************
1318 * get_idle_time - return how long the link has been idle.
1321 get_idle_time(u, ip)
1323 struct ppp_idle *ip;
1325 return ioctl(ppp_dev_fd, PPPIOCGIDLE, ip) >= 0;
1328 /********************************************************************
1330 * get_ppp_stats - return statistics for the link.
1333 get_ppp_stats(u, stats)
1335 struct pppd_stats *stats;
1337 struct ifpppstatsreq req;
1339 memset (&req, 0, sizeof (req));
1341 req.stats_ptr = (caddr_t) &req.stats;
1342 strlcpy(req.ifr__name, ifname, sizeof(req.ifr__name));
1343 if (ioctl(sock_fd, SIOCGPPPSTATS, &req) < 0) {
1344 error("Couldn't get PPP statistics: %m");
1347 stats->bytes_in = req.stats.p.ppp_ibytes;
1348 stats->bytes_out = req.stats.p.ppp_obytes;
1349 stats->pkts_in = req.stats.p.ppp_ipackets;
1350 stats->pkts_out = req.stats.p.ppp_opackets;
1354 /********************************************************************
1356 * ccp_fatal_error - returns 1 if decompression was disabled as a
1357 * result of an error detected after decompression of a packet,
1358 * 0 otherwise. This is necessary because of patent nonsense.
1361 int ccp_fatal_error (int unit)
1363 int x = get_flags(ppp_dev_fd);
1365 return x & SC_DC_FERROR;
1368 /********************************************************************
1370 * path_to_procfs - find the path to the proc file system mount point
1372 static char proc_path[MAXPATHLEN];
1373 static int proc_path_len;
1375 static char *path_to_procfs(const char *tail)
1377 struct mntent *mntent;
1380 if (proc_path_len == 0) {
1381 /* Default the mount location of /proc */
1382 strlcpy (proc_path, "/proc", sizeof(proc_path));
1384 fp = fopen(MOUNTED, "r");
1386 while ((mntent = getmntent(fp)) != NULL) {
1387 if (strcmp(mntent->mnt_type, MNTTYPE_IGNORE) == 0)
1389 if (strcmp(mntent->mnt_type, "proc") == 0) {
1390 strlcpy(proc_path, mntent->mnt_dir, sizeof(proc_path));
1391 proc_path_len = strlen(proc_path);
1399 strlcpy(proc_path + proc_path_len, tail,
1400 sizeof(proc_path) - proc_path_len);
1405 * /proc/net/route parsing stuff.
1407 #define ROUTE_MAX_COLS 12
1408 FILE *route_fd = (FILE *) 0;
1409 static char route_buffer[512];
1410 static int route_dev_col, route_dest_col, route_gw_col;
1411 static int route_flags_col, route_mask_col;
1412 static int route_num_cols;
1414 static int open_route_table (void);
1415 static void close_route_table (void);
1416 static int read_route_table (struct rtentry *rt);
1418 /********************************************************************
1420 * close_route_table - close the interface to the route table
1423 static void close_route_table (void)
1425 if (route_fd != (FILE *) 0) {
1427 route_fd = (FILE *) 0;
1431 /********************************************************************
1433 * open_route_table - open the interface to the route table
1435 static char route_delims[] = " \t\n";
1437 static int open_route_table (void)
1441 close_route_table();
1443 path = path_to_procfs("/net/route");
1444 route_fd = fopen (path, "r");
1445 if (route_fd == NULL) {
1446 error("can't open routing table %s: %m", path);
1450 route_dev_col = 0; /* default to usual columns */
1453 route_flags_col = 3;
1457 /* parse header line */
1458 if (fgets(route_buffer, sizeof(route_buffer), route_fd) != 0) {
1459 char *p = route_buffer, *q;
1461 for (col = 0; col < ROUTE_MAX_COLS; ++col) {
1463 if ((q = strtok(p, route_delims)) == 0)
1465 if (strcasecmp(q, "iface") == 0)
1466 route_dev_col = col;
1467 else if (strcasecmp(q, "destination") == 0)
1468 route_dest_col = col;
1469 else if (strcasecmp(q, "gateway") == 0)
1471 else if (strcasecmp(q, "flags") == 0)
1472 route_flags_col = col;
1473 else if (strcasecmp(q, "mask") == 0)
1474 route_mask_col = col;
1477 if (used && col >= route_num_cols)
1478 route_num_cols = col + 1;
1486 /********************************************************************
1488 * read_route_table - read the next entry from the route table
1491 static int read_route_table(struct rtentry *rt)
1493 char *cols[ROUTE_MAX_COLS], *p;
1496 memset (rt, '\0', sizeof (struct rtentry));
1498 if (fgets (route_buffer, sizeof (route_buffer), route_fd) == (char *) 0)
1502 for (col = 0; col < route_num_cols; ++col) {
1503 cols[col] = strtok(p, route_delims);
1504 if (cols[col] == NULL)
1505 return 0; /* didn't get enough columns */
1509 SIN_ADDR(rt->rt_dst) = strtoul(cols[route_dest_col], NULL, 16);
1510 SIN_ADDR(rt->rt_gateway) = strtoul(cols[route_gw_col], NULL, 16);
1511 SIN_ADDR(rt->rt_genmask) = strtoul(cols[route_mask_col], NULL, 16);
1513 rt->rt_flags = (short) strtoul(cols[route_flags_col], NULL, 16);
1514 rt->rt_dev = cols[route_dev_col];
1519 /********************************************************************
1521 * defaultroute_exists - determine if there is a default route
1524 static int defaultroute_exists (struct rtentry *rt)
1528 if (!open_route_table())
1531 while (read_route_table(rt) != 0) {
1532 if ((rt->rt_flags & RTF_UP) == 0)
1535 if (kernel_version > KVERSION(2,1,0) && SIN_ADDR(rt->rt_genmask) != 0)
1537 if (SIN_ADDR(rt->rt_dst) == 0L) {
1543 close_route_table();
1548 * have_route_to - determine if the system has any route to
1549 * a given IP address. `addr' is in network byte order.
1550 * Return value is 1 if yes, 0 if no, -1 if don't know.
1551 * For demand mode to work properly, we have to ignore routes
1552 * through our own interface.
1554 int have_route_to(u_int32_t addr)
1559 if (!open_route_table())
1560 return -1; /* don't know */
1562 while (read_route_table(&rt)) {
1563 if ((rt.rt_flags & RTF_UP) == 0 || strcmp(rt.rt_dev, ifname) == 0)
1565 if ((addr & SIN_ADDR(rt.rt_genmask)) == SIN_ADDR(rt.rt_dst)) {
1571 close_route_table();
1575 /********************************************************************
1577 * sifdefaultroute - assign a default route through the address given.
1580 int sifdefaultroute (int unit, u_int32_t ouraddr, u_int32_t gateway)
1584 if (defaultroute_exists(&rt) && strcmp(rt.rt_dev, ifname) != 0) {
1585 u_int32_t old_gateway = SIN_ADDR(rt.rt_gateway);
1587 if (old_gateway != gateway)
1588 error("not replacing existing default route to %s [%I]",
1589 rt.rt_dev, old_gateway);
1593 memset (&rt, '\0', sizeof (rt));
1594 SET_SA_FAMILY (rt.rt_dst, AF_INET);
1595 SET_SA_FAMILY (rt.rt_gateway, AF_INET);
1599 if (kernel_version > KVERSION(2,1,0)) {
1600 SET_SA_FAMILY (rt.rt_genmask, AF_INET);
1601 SIN_ADDR(rt.rt_genmask) = 0L;
1604 SIN_ADDR(rt.rt_gateway) = gateway;
1606 rt.rt_flags = RTF_UP | RTF_GATEWAY;
1607 if (ioctl(sock_fd, SIOCADDRT, &rt) < 0) {
1608 if ( ! ok_error ( errno ))
1609 error("default route ioctl(SIOCADDRT): %m");
1613 default_route_gateway = gateway;
1617 /********************************************************************
1619 * cifdefaultroute - delete a default route through the address given.
1622 int cifdefaultroute (int unit, u_int32_t ouraddr, u_int32_t gateway)
1626 default_route_gateway = 0;
1628 memset (&rt, '\0', sizeof (rt));
1629 SET_SA_FAMILY (rt.rt_dst, AF_INET);
1630 SET_SA_FAMILY (rt.rt_gateway, AF_INET);
1632 if (kernel_version > KVERSION(2,1,0)) {
1633 SET_SA_FAMILY (rt.rt_genmask, AF_INET);
1634 SIN_ADDR(rt.rt_genmask) = 0L;
1637 SIN_ADDR(rt.rt_gateway) = gateway;
1639 rt.rt_flags = RTF_UP | RTF_GATEWAY;
1640 if (ioctl(sock_fd, SIOCDELRT, &rt) < 0 && errno != ESRCH) {
1642 if ( ! ok_error ( errno ))
1643 error("default route ioctl(SIOCDELRT): %m");
1651 /********************************************************************
1653 * sifproxyarp - Make a proxy ARP entry for the peer.
1656 int sifproxyarp (int unit, u_int32_t his_adr)
1658 struct arpreq arpreq;
1661 if (has_proxy_arp == 0) {
1662 memset (&arpreq, '\0', sizeof(arpreq));
1664 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
1665 SIN_ADDR(arpreq.arp_pa) = his_adr;
1666 arpreq.arp_flags = ATF_PERM | ATF_PUBL;
1668 * Get the hardware address of an interface on the same subnet
1669 * as our local address.
1671 if (!get_ether_addr(his_adr, &arpreq.arp_ha, proxy_arp_dev,
1672 sizeof(proxy_arp_dev))) {
1673 error("Cannot determine ethernet address for proxy ARP");
1676 strlcpy(arpreq.arp_dev, proxy_arp_dev, sizeof(arpreq.arp_dev));
1678 if (ioctl(sock_fd, SIOCSARP, (caddr_t)&arpreq) < 0) {
1679 if ( ! ok_error ( errno ))
1680 error("ioctl(SIOCSARP): %m");
1683 proxy_arp_addr = his_adr;
1687 forw_path = path_to_procfs("/sys/net/ipv4/ip_forward");
1688 if (forw_path != 0) {
1689 int fd = open(forw_path, O_WRONLY);
1691 if (write(fd, "1", 1) != 1)
1692 error("Couldn't enable IP forwarding: %m");
1702 /********************************************************************
1704 * cifproxyarp - Delete the proxy ARP entry for the peer.
1707 int cifproxyarp (int unit, u_int32_t his_adr)
1709 struct arpreq arpreq;
1711 if (has_proxy_arp) {
1713 memset (&arpreq, '\0', sizeof(arpreq));
1714 SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
1715 SIN_ADDR(arpreq.arp_pa) = his_adr;
1716 arpreq.arp_flags = ATF_PERM | ATF_PUBL;
1717 strlcpy(arpreq.arp_dev, proxy_arp_dev, sizeof(arpreq.arp_dev));
1719 if (ioctl(sock_fd, SIOCDARP, (caddr_t)&arpreq) < 0) {
1720 if ( ! ok_error ( errno ))
1721 warn("ioctl(SIOCDARP): %m");
1728 /********************************************************************
1730 * get_ether_addr - get the hardware address of an interface on the
1731 * the same subnet as ipaddr.
1734 static int get_ether_addr (u_int32_t ipaddr,
1735 struct sockaddr *hwaddr,
1736 char *name, int namelen)
1738 struct ifreq *ifr, *ifend;
1739 u_int32_t ina, mask;
1741 struct ifreq ifreq, bestifreq;
1743 struct ifreq ifs[MAX_IFS];
1745 u_int32_t bestmask=0;
1746 int found_interface = 0;
1748 ifc.ifc_len = sizeof(ifs);
1750 if (ioctl(sock_fd, SIOCGIFCONF, &ifc) < 0) {
1751 if ( ! ok_error ( errno ))
1752 error("ioctl(SIOCGIFCONF): %m (line %d)", __LINE__);
1756 SYSDEBUG ((LOG_DEBUG, "proxy arp: scanning %d interfaces for IP %s",
1757 ifc.ifc_len / sizeof(struct ifreq), ip_ntoa(ipaddr)));
1759 * Scan through looking for an interface with an Internet
1760 * address on the same subnet as `ipaddr'.
1762 ifend = ifs + (ifc.ifc_len / sizeof(struct ifreq));
1763 for (ifr = ifc.ifc_req; ifr < ifend; ifr++) {
1764 if (ifr->ifr_addr.sa_family == AF_INET) {
1765 ina = SIN_ADDR(ifr->ifr_addr);
1766 strlcpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1767 SYSDEBUG ((LOG_DEBUG, "proxy arp: examining interface %s",
1770 * Check that the interface is up, and not point-to-point
1773 if (ioctl(sock_fd, SIOCGIFFLAGS, &ifreq) < 0)
1776 if (((ifreq.ifr_flags ^ FLAGS_GOOD) & FLAGS_MASK) != 0)
1779 * Get its netmask and check that it's on the right subnet.
1781 if (ioctl(sock_fd, SIOCGIFNETMASK, &ifreq) < 0)
1784 mask = SIN_ADDR(ifreq.ifr_addr);
1785 SYSDEBUG ((LOG_DEBUG, "proxy arp: interface addr %s mask %lx",
1786 ip_ntoa(ina), ntohl(mask)));
1788 if (((ipaddr ^ ina) & mask) != 0)
1789 continue; /* no match */
1791 if (mask >= bestmask) {
1792 /* Compare using >= instead of > -- it is possible for
1793 an interface to have a netmask of 0.0.0.0 */
1794 found_interface = 1;
1801 if (!found_interface) return 0;
1803 strlcpy(name, bestifreq.ifr_name, namelen);
1805 /* trim off the :1 in eth0:1 */
1806 aliasp = strchr(name, ':');
1810 info("found interface %s for proxy arp", name);
1812 * Now get the hardware address.
1814 memset (&bestifreq.ifr_hwaddr, 0, sizeof (struct sockaddr));
1815 if (ioctl (sock_fd, SIOCGIFHWADDR, &bestifreq) < 0) {
1816 error("SIOCGIFHWADDR(%s): %m", bestifreq.ifr_name);
1821 &bestifreq.ifr_hwaddr,
1822 sizeof (struct sockaddr));
1824 SYSDEBUG ((LOG_DEBUG,
1825 "proxy arp: found hwaddr %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x",
1826 (int) ((unsigned char *) &hwaddr->sa_data)[0],
1827 (int) ((unsigned char *) &hwaddr->sa_data)[1],
1828 (int) ((unsigned char *) &hwaddr->sa_data)[2],
1829 (int) ((unsigned char *) &hwaddr->sa_data)[3],
1830 (int) ((unsigned char *) &hwaddr->sa_data)[4],
1831 (int) ((unsigned char *) &hwaddr->sa_data)[5],
1832 (int) ((unsigned char *) &hwaddr->sa_data)[6],
1833 (int) ((unsigned char *) &hwaddr->sa_data)[7]));
1838 * get_if_hwaddr - get the hardware address for the specified
1839 * network interface device.
1842 get_if_hwaddr(u_char *addr, char *name)
1847 sock_fd = socket(AF_INET, SOCK_DGRAM, 0);
1850 memset(&ifreq.ifr_hwaddr, 0, sizeof(struct sockaddr));
1851 strlcpy(ifreq.ifr_name, name, sizeof(ifreq.ifr_name));
1852 ret = ioctl(sock_fd, SIOCGIFHWADDR, &ifreq);
1855 memcpy(addr, ifreq.ifr_hwaddr.sa_data, 6);
1860 * get_first_ethernet - return the name of the first ethernet-style
1861 * interface on this system.
1864 get_first_ethernet()
1869 /********************************************************************
1871 * Return user specified netmask, modified by any mask we might determine
1872 * for address `addr' (in network byte order).
1873 * Here we scan through the system's list of interfaces, looking for
1874 * any non-point-to-point interfaces which might appear to be on the same
1875 * network as `addr'. If we find any, we OR in their netmask to the
1876 * user-specified netmask.
1879 u_int32_t GetMask (u_int32_t addr)
1881 u_int32_t mask, nmask, ina;
1882 struct ifreq *ifr, *ifend, ifreq;
1884 struct ifreq ifs[MAX_IFS];
1888 if (IN_CLASSA(addr)) /* determine network mask for address class */
1889 nmask = IN_CLASSA_NET;
1890 else if (IN_CLASSB(addr))
1891 nmask = IN_CLASSB_NET;
1893 nmask = IN_CLASSC_NET;
1895 /* class D nets are disallowed by bad_ip_adrs */
1896 mask = netmask | htonl(nmask);
1898 * Scan through the system's network interfaces.
1900 ifc.ifc_len = sizeof(ifs);
1902 if (ioctl(sock_fd, SIOCGIFCONF, &ifc) < 0) {
1903 if ( ! ok_error ( errno ))
1904 warn("ioctl(SIOCGIFCONF): %m (line %d)", __LINE__);
1908 ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1909 for (ifr = ifc.ifc_req; ifr < ifend; ifr++) {
1911 * Check the interface's internet address.
1913 if (ifr->ifr_addr.sa_family != AF_INET)
1915 ina = SIN_ADDR(ifr->ifr_addr);
1916 if (((ntohl(ina) ^ addr) & nmask) != 0)
1919 * Check that the interface is up, and not point-to-point nor loopback.
1921 strlcpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1922 if (ioctl(sock_fd, SIOCGIFFLAGS, &ifreq) < 0)
1925 if (((ifreq.ifr_flags ^ FLAGS_GOOD) & FLAGS_MASK) != 0)
1928 * Get its netmask and OR it into our mask.
1930 if (ioctl(sock_fd, SIOCGIFNETMASK, &ifreq) < 0)
1932 mask |= SIN_ADDR(ifreq.ifr_addr);
1938 /********************************************************************
1940 * Internal routine to decode the version.modification.patch level
1943 static void decode_version (char *buf, int *version,
1944 int *modification, int *patch)
1948 *version = (int) strtoul (buf, &endp, 10);
1952 if (endp != buf && *endp == '.') {
1954 *modification = (int) strtoul (buf, &endp, 10);
1955 if (endp != buf && *endp == '.') {
1957 *patch = (int) strtoul (buf, &buf, 10);
1962 /********************************************************************
1964 * Procedure to determine if the PPP line discipline is registered.
1968 ppp_registered(void)
1976 * We used to open the serial device and set it to the ppp line
1977 * discipline here, in order to create a ppp unit. But that is
1978 * not a good idea - the user might have specified a device that
1979 * they can't open (permission, or maybe it doesn't really exist).
1980 * So we grab a pty master/slave pair and use that.
1982 if (!get_pty(&mfd, &local_fd, slave, 0)) {
1983 no_ppp_msg = "Couldn't determine if PPP is supported (no free ptys)";
1988 * Try to put the device into the PPP discipline.
1990 if (ioctl(local_fd, TIOCSETD, &ppp_disc) < 0) {
1991 error("ioctl(TIOCSETD(PPP)): %m (line %d)", __LINE__);
2000 /********************************************************************
2002 * ppp_available - check whether the system has any ppp interfaces
2003 * (in fact we check whether we can do an ioctl on ppp0).
2006 int ppp_available(void)
2011 int my_version, my_modification, my_patch;
2012 int osmaj, osmin, ospatch;
2015 "This system lacks kernel support for PPP. This could be because\n"
2016 "the PPP kernel module could not be loaded, or because PPP was not\n"
2017 "included in the kernel configuration. If PPP was included as a\n"
2018 "module, try `/sbin/modprobe -v ppp'. If that fails, check that\n"
2019 "ppp.o exists in /lib/modules/`uname -r`/net.\n"
2020 "See README.linux file in the ppp distribution for more details.\n";
2022 /* get the kernel version now, since we are called before sys_init */
2024 osmaj = osmin = ospatch = 0;
2025 sscanf(utsname.release, "%d.%d.%d", &osmaj, &osmin, &ospatch);
2026 kernel_version = KVERSION(osmaj, osmin, ospatch);
2028 fd = open("/dev/ppp", O_RDWR);
2030 if (fd < 0 && errno == ENOENT) {
2031 /* try making it and see if that helps. */
2032 if (mknod("/dev/ppp", S_IFCHR | S_IRUSR | S_IWUSR,
2033 makedev(108, 0)) >= 0) {
2034 fd = open("/dev/ppp", O_RDWR);
2036 info("Created /dev/ppp device node");
2038 unlink("/dev/ppp"); /* didn't work, undo the mknod */
2039 } else if (errno == EEXIST) {
2040 fd = open("/dev/ppp", O_RDWR);
2045 new_style_driver = 1;
2047 /* XXX should get from driver */
2049 driver_modification = 4;
2054 if (kernel_version >= KVERSION(2,3,13)) {
2055 if (errno == ENOENT)
2057 "pppd is unable to open the /dev/ppp device.\n"
2058 "You need to create the /dev/ppp device node by\n"
2059 "executing the following command as root:\n"
2060 " mknod /dev/ppp c 108 0\n";
2065 * Open a socket for doing the ioctl operations.
2067 s = socket(AF_INET, SOCK_DGRAM, 0);
2071 strlcpy (ifr.ifr_name, "ppp0", sizeof (ifr.ifr_name));
2072 ok = ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) >= 0;
2074 * If the device did not exist then attempt to create one by putting the
2075 * current tty into the PPP discipline. If this works then obtain the
2076 * flags for the device again.
2079 if (ppp_registered()) {
2080 strlcpy (ifr.ifr_name, "ppp0", sizeof (ifr.ifr_name));
2081 ok = ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) >= 0;
2085 * Ensure that the hardware address is for PPP and not something else
2088 ok = ioctl (s, SIOCGIFHWADDR, (caddr_t) &ifr) >= 0;
2090 if (ok && ((ifr.ifr_hwaddr.sa_family & ~0xFF) != ARPHRD_PPP))
2094 * This is the PPP device. Validate the version of the driver at this
2095 * point to ensure that this program will work with the driver.
2098 char abBuffer [1024];
2100 ifr.ifr_data = abBuffer;
2101 size = ioctl (s, SIOCGPPPVER, (caddr_t) &ifr);
2103 error("Couldn't read driver version: %m");
2105 no_ppp_msg = "Sorry, couldn't verify kernel driver version\n";
2108 decode_version(abBuffer,
2110 &driver_modification,
2113 * Validate the version of the driver against the version that we used.
2115 decode_version(VERSION,
2120 /* The version numbers must match */
2121 if (driver_version != my_version)
2124 /* The modification levels must be legal */
2125 if (driver_modification < 3) {
2126 if (driver_modification >= 2) {
2127 /* we can cope with 2.2.0 and above */
2136 slprintf(route_buffer, sizeof(route_buffer),
2137 "Sorry - PPP driver version %d.%d.%d is out of date\n",
2138 driver_version, driver_modification, driver_patch);
2140 no_ppp_msg = route_buffer;
2147 /********************************************************************
2149 * Update the wtmp file with the appropriate user name and tty device.
2152 void logwtmp (const char *line, const char *name, const char *host)
2154 struct utmp ut, *utp;
2155 pid_t mypid = getpid();
2161 * Update the signon database for users.
2162 * Christoph Lameter: Copied from poeigl-1.36 Jan 3, 1996
2164 utmpname(_PATH_UTMP);
2166 while ((utp = getutent()) && (utp->ut_pid != mypid))
2170 memcpy(&ut, utp, sizeof(ut));
2172 /* some gettys/telnetds don't initialize utmp... */
2173 memset(&ut, 0, sizeof(ut));
2175 if (ut.ut_id[0] == 0)
2176 strncpy(ut.ut_id, line + 3, sizeof(ut.ut_id));
2178 strncpy(ut.ut_user, name, sizeof(ut.ut_user));
2179 strncpy(ut.ut_line, line, sizeof(ut.ut_line));
2183 ut.ut_type = USER_PROCESS;
2186 /* Insert the host name if one is supplied */
2188 strncpy (ut.ut_host, host, sizeof(ut.ut_host));
2190 /* Insert the IP address of the remote system if IP is enabled */
2191 if (ipcp_protent.enabled_flag && ipcp_hisoptions[0].neg_addr)
2192 memcpy(&ut.ut_addr, (char *) &ipcp_hisoptions[0].hisaddr,
2193 sizeof(ut.ut_addr));
2195 /* CL: Makes sure that the logout works */
2196 if (*host == 0 && *name==0)
2202 * Update the wtmp file.
2205 updwtmp(_PATH_WTMP, &ut);
2207 wtmp = open(_PATH_WTMP, O_APPEND|O_WRONLY);
2209 flock(wtmp, LOCK_EX);
2211 if (write (wtmp, (char *)&ut, sizeof(ut)) != sizeof(ut))
2212 warn("error writing %s: %m", _PATH_WTMP);
2214 flock(wtmp, LOCK_UN);
2222 /********************************************************************
2224 * sifvjcomp - config tcp header compression
2227 int sifvjcomp (int u, int vjcomp, int cidcomp, int maxcid)
2229 u_int x = get_flags(ppp_dev_fd);
2232 if (ioctl (ppp_dev_fd, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0) {
2233 if (! ok_error (errno))
2234 error("ioctl(PPPIOCSMAXCID): %m (line %d)", __LINE__);
2239 x = vjcomp ? x | SC_COMP_TCP : x &~ SC_COMP_TCP;
2240 x = cidcomp ? x & ~SC_NO_TCP_CCID : x | SC_NO_TCP_CCID;
2241 set_flags (ppp_dev_fd, x);
2246 /********************************************************************
2248 * sifup - Config the interface up and enable IP packets to pass.
2255 memset (&ifr, '\0', sizeof (ifr));
2256 strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
2257 if (ioctl(sock_fd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
2258 if (! ok_error (errno))
2259 error("ioctl (SIOCGIFFLAGS): %m (line %d)", __LINE__);
2263 ifr.ifr_flags |= (IFF_UP | IFF_POINTOPOINT);
2264 if (ioctl(sock_fd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
2265 if (! ok_error (errno))
2266 error("ioctl(SIOCSIFFLAGS): %m (line %d)", __LINE__);
2274 /********************************************************************
2276 * sifdown - Disable the indicated protocol and config the interface
2277 * down if there are no remaining protocols.
2284 if (if_is_up && --if_is_up > 0)
2287 memset (&ifr, '\0', sizeof (ifr));
2288 strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
2289 if (ioctl(sock_fd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
2290 if (! ok_error (errno))
2291 error("ioctl (SIOCGIFFLAGS): %m (line %d)", __LINE__);
2295 ifr.ifr_flags &= ~IFF_UP;
2296 ifr.ifr_flags |= IFF_POINTOPOINT;
2297 if (ioctl(sock_fd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
2298 if (! ok_error (errno))
2299 error("ioctl(SIOCSIFFLAGS): %m (line %d)", __LINE__);
2305 /********************************************************************
2307 * sifaddr - Config the interface IP addresses and netmask.
2310 int sifaddr (int unit, u_int32_t our_adr, u_int32_t his_adr,
2316 memset (&ifr, '\0', sizeof (ifr));
2317 memset (&rt, '\0', sizeof (rt));
2319 SET_SA_FAMILY (ifr.ifr_addr, AF_INET);
2320 SET_SA_FAMILY (ifr.ifr_dstaddr, AF_INET);
2321 SET_SA_FAMILY (ifr.ifr_netmask, AF_INET);
2323 strlcpy (ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
2325 * Set our IP address
2327 SIN_ADDR(ifr.ifr_addr) = our_adr;
2328 if (ioctl(sock_fd, SIOCSIFADDR, (caddr_t) &ifr) < 0) {
2329 if (errno != EEXIST) {
2330 if (! ok_error (errno))
2331 error("ioctl(SIOCSIFADDR): %m (line %d)", __LINE__);
2334 warn("ioctl(SIOCSIFADDR): Address already exists");
2339 * Set the gateway address
2341 SIN_ADDR(ifr.ifr_dstaddr) = his_adr;
2342 if (ioctl(sock_fd, SIOCSIFDSTADDR, (caddr_t) &ifr) < 0) {
2343 if (! ok_error (errno))
2344 error("ioctl(SIOCSIFDSTADDR): %m (line %d)", __LINE__);
2349 * For recent kernels, force the netmask to 255.255.255.255.
2351 if (kernel_version >= KVERSION(2,1,16))
2353 if (net_mask != 0) {
2354 SIN_ADDR(ifr.ifr_netmask) = net_mask;
2355 if (ioctl(sock_fd, SIOCSIFNETMASK, (caddr_t) &ifr) < 0) {
2356 if (! ok_error (errno))
2357 error("ioctl(SIOCSIFNETMASK): %m (line %d)", __LINE__);
2362 * Add the device route
2364 if (kernel_version < KVERSION(2,1,16)) {
2365 SET_SA_FAMILY (rt.rt_dst, AF_INET);
2366 SET_SA_FAMILY (rt.rt_gateway, AF_INET);
2369 SIN_ADDR(rt.rt_gateway) = 0L;
2370 SIN_ADDR(rt.rt_dst) = his_adr;
2371 rt.rt_flags = RTF_UP | RTF_HOST;
2373 if (kernel_version > KVERSION(2,1,0)) {
2374 SET_SA_FAMILY (rt.rt_genmask, AF_INET);
2375 SIN_ADDR(rt.rt_genmask) = -1L;
2378 if (ioctl(sock_fd, SIOCADDRT, &rt) < 0) {
2379 if (! ok_error (errno))
2380 error("ioctl(SIOCADDRT) device route: %m (line %d)", __LINE__);
2385 /* set ip_dynaddr in demand mode if address changes */
2386 if (demand && tune_kernel && !dynaddr_set
2387 && our_old_addr && our_old_addr != our_adr) {
2388 /* set ip_dynaddr if possible */
2392 path = path_to_procfs("/sys/net/ipv4/ip_dynaddr");
2393 if (path != 0 && (fd = open(path, O_WRONLY)) >= 0) {
2394 if (write(fd, "1", 1) != 1)
2395 error("Couldn't enable dynamic IP addressing: %m");
2398 dynaddr_set = 1; /* only 1 attempt */
2405 /********************************************************************
2407 * cifaddr - Clear the interface IP addresses, and delete routes
2408 * through the interface if possible.
2411 int cifaddr (int unit, u_int32_t our_adr, u_int32_t his_adr)
2415 if (kernel_version < KVERSION(2,1,16)) {
2417 * Delete the route through the device
2420 memset (&rt, '\0', sizeof (rt));
2422 SET_SA_FAMILY (rt.rt_dst, AF_INET);
2423 SET_SA_FAMILY (rt.rt_gateway, AF_INET);
2426 SIN_ADDR(rt.rt_gateway) = 0;
2427 SIN_ADDR(rt.rt_dst) = his_adr;
2428 rt.rt_flags = RTF_UP | RTF_HOST;
2430 if (kernel_version > KVERSION(2,1,0)) {
2431 SET_SA_FAMILY (rt.rt_genmask, AF_INET);
2432 SIN_ADDR(rt.rt_genmask) = -1L;
2435 if (ioctl(sock_fd, SIOCDELRT, &rt) < 0 && errno != ESRCH) {
2436 if (still_ppp() && ! ok_error (errno))
2437 error("ioctl(SIOCDELRT) device route: %m (line %d)", __LINE__);
2442 /* This way it is possible to have an IPX-only or IPv6-only interface */
2443 memset(&ifr, 0, sizeof(ifr));
2444 SET_SA_FAMILY(ifr.ifr_addr, AF_INET);
2445 strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
2447 if (ioctl(sock_fd, SIOCSIFADDR, (caddr_t) &ifr) < 0) {
2448 if (! ok_error (errno)) {
2449 error("ioctl(SIOCSIFADDR): %m (line %d)", __LINE__);
2454 our_old_addr = our_adr;
2460 /********************************************************************
2462 * sif6addr - Config the interface with an IPv6 link-local address
2464 int sif6addr (int unit, eui64_t our_eui64, eui64_t his_eui64)
2466 struct in6_ifreq ifr6;
2468 struct in6_rtmsg rt6;
2472 error("IPv6 socket creation failed: %m");
2475 memset(&ifr, 0, sizeof (ifr));
2476 strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
2477 if (ioctl(sock6_fd, SIOCGIFINDEX, (caddr_t) &ifr) < 0) {
2478 error("sif6addr: ioctl(SIOCGIFINDEX): %m (line %d)", __LINE__);
2482 /* Local interface */
2483 memset(&ifr6, 0, sizeof(ifr6));
2484 IN6_LLADDR_FROM_EUI64(ifr6.ifr6_addr, our_eui64);
2485 ifr6.ifr6_ifindex = ifr.ifr_ifindex;
2486 ifr6.ifr6_prefixlen = 10;
2488 if (ioctl(sock6_fd, SIOCSIFADDR, &ifr6) < 0) {
2489 error("sif6addr: ioctl(SIOCSIFADDR): %m (line %d)", __LINE__);
2493 /* Route to remote host */
2494 memset(&rt6, 0, sizeof(rt6));
2495 IN6_LLADDR_FROM_EUI64(rt6.rtmsg_dst, his_eui64);
2496 rt6.rtmsg_flags = RTF_UP;
2497 rt6.rtmsg_dst_len = 10;
2498 rt6.rtmsg_ifindex = ifr.ifr_ifindex;
2499 rt6.rtmsg_metric = 1;
2501 if (ioctl(sock6_fd, SIOCADDRT, &rt6) < 0) {
2502 error("sif6addr: ioctl(SIOCADDRT): %m (line %d)", __LINE__);
2510 /********************************************************************
2512 * cif6addr - Remove IPv6 address from interface
2514 int cif6addr (int unit, eui64_t our_eui64, eui64_t his_eui64)
2517 struct in6_ifreq ifr6;
2521 error("IPv6 socket creation failed: %m");
2524 memset(&ifr, 0, sizeof(ifr));
2525 strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
2526 if (ioctl(sock6_fd, SIOCGIFINDEX, (caddr_t) &ifr) < 0) {
2527 error("cif6addr: ioctl(SIOCGIFINDEX): %m (line %d)", __LINE__);
2531 memset(&ifr6, 0, sizeof(ifr6));
2532 IN6_LLADDR_FROM_EUI64(ifr6.ifr6_addr, our_eui64);
2533 ifr6.ifr6_ifindex = ifr.ifr_ifindex;
2534 ifr6.ifr6_prefixlen = 10;
2536 if (ioctl(sock6_fd, SIOCDIFADDR, &ifr6) < 0) {
2537 if (errno != EADDRNOTAVAIL) {
2538 if (! ok_error (errno))
2539 error("cif6addr: ioctl(SIOCDIFADDR): %m (line %d)", __LINE__);
2542 warn("cif6addr: ioctl(SIOCDIFADDR): No such address");
2551 * get_pty - get a pty master/slave pair and chown the slave side
2552 * to the uid given. Assumes slave_name points to >= 16 bytes of space.
2555 get_pty(master_fdp, slave_fdp, slave_name, uid)
2561 int i, mfd, sfd = -1;
2563 struct termios tios;
2567 * Try the unix98 way first.
2569 mfd = open("/dev/ptmx", O_RDWR);
2572 if (ioctl(mfd, TIOCGPTN, &ptn) >= 0) {
2573 slprintf(pty_name, sizeof(pty_name), "/dev/pts/%d", ptn);
2574 chmod(pty_name, S_IRUSR | S_IWUSR);
2577 if (ioctl(mfd, TIOCSPTLCK, &ptn) < 0)
2578 warn("Couldn't unlock pty slave %s: %m", pty_name);
2580 if ((sfd = open(pty_name, O_RDWR | O_NOCTTY)) < 0)
2581 warn("Couldn't open pty slave %s: %m", pty_name);
2584 #endif /* TIOCGPTN */
2587 /* the old way - scan through the pty name space */
2588 for (i = 0; i < 64; ++i) {
2589 slprintf(pty_name, sizeof(pty_name), "/dev/pty%c%x",
2590 'p' + i / 16, i % 16);
2591 mfd = open(pty_name, O_RDWR, 0);
2594 sfd = open(pty_name, O_RDWR | O_NOCTTY, 0);
2596 fchown(sfd, uid, -1);
2597 fchmod(sfd, S_IRUSR | S_IWUSR);
2608 strlcpy(slave_name, pty_name, 16);
2611 if (tcgetattr(sfd, &tios) == 0) {
2612 tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB);
2613 tios.c_cflag |= CS8 | CREAD | CLOCAL;
2614 tios.c_iflag = IGNPAR;
2617 if (tcsetattr(sfd, TCSAFLUSH, &tios) < 0)
2618 warn("couldn't set attributes on pty: %m");
2620 warn("couldn't get attributes on pty: %m");
2625 /********************************************************************
2627 * open_loopback - open the device we use for getting packets
2628 * in demand mode. Under Linux, we use a pty master/slave pair.
2631 open_ppp_loopback(void)
2636 if (new_style_driver) {
2637 /* allocate ourselves a ppp unit */
2638 if (make_ppp_unit() < 0)
2640 set_flags(ppp_dev_fd, SC_LOOP_TRAFFIC);
2641 set_kdebugflag(kdebugflag);
2646 if (!get_pty(&master_fd, &slave_fd, loop_name, 0))
2647 fatal("No free pty for loopback");
2648 SYSDEBUG(("using %s for loopback", loop_name));
2650 set_ppp_fd(slave_fd);
2652 flags = fcntl(master_fd, F_GETFL);
2654 fcntl(master_fd, F_SETFL, flags | O_NONBLOCK) == -1)
2655 warn("couldn't set master loopback to nonblock: %m");
2657 flags = fcntl(ppp_fd, F_GETFL);
2659 fcntl(ppp_fd, F_SETFL, flags | O_NONBLOCK) == -1)
2660 warn("couldn't set slave loopback to nonblock: %m");
2662 if (ioctl(ppp_fd, TIOCSETD, &ppp_disc) < 0)
2663 fatal("ioctl(TIOCSETD): %m (line %d)", __LINE__);
2665 * Find out which interface we were given.
2667 if (ioctl(ppp_fd, PPPIOCGUNIT, &ifunit) < 0)
2668 fatal("ioctl(PPPIOCGUNIT): %m (line %d)", __LINE__);
2670 * Enable debug in the driver if requested.
2672 set_kdebugflag (kdebugflag);
2677 /********************************************************************
2679 * sifnpmode - Set the mode for handling packets for a given NP.
2683 sifnpmode(u, proto, mode)
2690 npi.protocol = proto;
2692 if (ioctl(ppp_dev_fd, PPPIOCSNPMODE, (caddr_t) &npi) < 0) {
2693 if (! ok_error (errno))
2694 error("ioctl(PPPIOCSNPMODE, %d, %d): %m", proto, mode);
2701 /********************************************************************
2703 * sipxfaddr - Config the interface IPX networknumber
2706 int sipxfaddr (int unit, unsigned long int network, unsigned char * node )
2713 struct sockaddr_ipx *sipx = (struct sockaddr_ipx *) &ifr.ifr_addr;
2715 skfd = socket (AF_IPX, SOCK_DGRAM, 0);
2717 if (! ok_error (errno))
2718 dbglog("socket(AF_IPX): %m (line %d)", __LINE__);
2722 memset (&ifr, '\0', sizeof (ifr));
2723 strlcpy (ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
2725 memcpy (sipx->sipx_node, node, IPX_NODE_LEN);
2726 sipx->sipx_family = AF_IPX;
2727 sipx->sipx_port = 0;
2728 sipx->sipx_network = htonl (network);
2729 sipx->sipx_type = IPX_FRAME_ETHERII;
2730 sipx->sipx_action = IPX_CRTITF;
2732 * Set the IPX device
2734 if (ioctl(skfd, SIOCSIFADDR, (caddr_t) &ifr) < 0) {
2736 if (errno != EEXIST) {
2737 if (! ok_error (errno))
2738 dbglog("ioctl(SIOCSIFADDR, CRTITF): %m (line %d)", __LINE__);
2741 warn("ioctl(SIOCSIFADDR, CRTITF): Address already exists");
2750 /********************************************************************
2752 * cipxfaddr - Clear the information for the IPX network. The IPX routes
2753 * are removed and the device is no longer able to pass IPX
2757 int cipxfaddr (int unit)
2764 struct sockaddr_ipx *sipx = (struct sockaddr_ipx *) &ifr.ifr_addr;
2766 skfd = socket (AF_IPX, SOCK_DGRAM, 0);
2768 if (! ok_error (errno))
2769 dbglog("socket(AF_IPX): %m (line %d)", __LINE__);
2773 memset (&ifr, '\0', sizeof (ifr));
2774 strlcpy (ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
2776 sipx->sipx_type = IPX_FRAME_ETHERII;
2777 sipx->sipx_action = IPX_DLTITF;
2778 sipx->sipx_family = AF_IPX;
2780 * Set the IPX device
2782 if (ioctl(skfd, SIOCSIFADDR, (caddr_t) &ifr) < 0) {
2783 if (! ok_error (errno))
2784 info("ioctl(SIOCSIFADDR, IPX_DLTITF): %m (line %d)", __LINE__);
2794 * Use the hostname as part of the random number seed.
2803 for (p = hostname; *p != 0; ++p)
2808 /********************************************************************
2810 * sys_check_options - check the options that the user specified
2814 sys_check_options(void)
2818 * Disable the IPX protocol if the support is not present in the kernel.
2822 if (ipxcp_protent.enabled_flag) {
2823 struct stat stat_buf;
2824 if ((path = path_to_procfs("/net/ipx_interface")) == 0
2825 || lstat(path, &stat_buf) < 0) {
2826 error("IPX support is not present in the kernel\n");
2827 ipxcp_protent.enabled_flag = 0;
2831 if (demand && driver_is_old) {
2832 option_error("demand dialling is not supported by kernel driver "
2833 "version %d.%d.%d", driver_version, driver_modification,
2837 if (multilink && !new_style_driver) {
2838 warn("Warning: multilink is not supported by the kernel driver");
2846 * ether_to_eui64 - Convert 48-bit Ethernet address into 64-bit EUI
2848 * convert the 48-bit MAC address of eth0 into EUI 64. caller also assumes
2849 * that the system has a properly configured Ethernet interface for this
2850 * function to return non-zero.
2853 ether_to_eui64(eui64_t *p_eui64)
2857 const unsigned char *ptr;
2859 skfd = socket(PF_INET6, SOCK_DGRAM, 0);
2862 warn("could not open IPv6 socket");
2866 strcpy(ifr.ifr_name, "eth0");
2867 if(ioctl(skfd, SIOCGIFHWADDR, &ifr) < 0)
2870 warn("could not obtain hardware address for eth0");
2876 * And convert the EUI-48 into EUI-64, per RFC 2472 [sec 4.1]
2878 ptr = ifr.ifr_hwaddr.sa_data;
2879 p_eui64->e8[0] = ptr[0] | 0x02;
2880 p_eui64->e8[1] = ptr[1];
2881 p_eui64->e8[2] = ptr[2];
2882 p_eui64->e8[3] = 0xFF;
2883 p_eui64->e8[4] = 0xFE;
2884 p_eui64->e8[5] = ptr[3];
2885 p_eui64->e8[6] = ptr[4];
2886 p_eui64->e8[7] = ptr[5];