source: rtems/c/src/libnetworking/pppd/sys-rtems.c @ d0d73ec

4.104.114.84.95
Last change on this file since d0d73ec was cb1e8a46, checked in by Joel Sherrill <joel.sherrill@…>, on 02/27/02 at 22:43:31

2002-02-27 Ilya Alexeev <ilya@…>

  • net/if_ppp.c, pppd/auth.c, pppd/chat.c, pppd/pppd.h, pppd/sys-rtems.c: Add server with pap-authorization capabilities as well as eliminate some warnings.
  • Property mode set to 100644
File size: 31.3 KB
Line 
1/*
2 * sys-bsd.c - System-dependent procedures for setting up
3 * PPP interfaces on bsd-4.4-ish systems (including 386BSD, NetBSD, etc.)
4 *
5 * Copyright (c) 1989 Carnegie Mellon University.
6 * Copyright (c) 1995 The Australian National University.
7 * All rights reserved.
8 *
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
17 * permission.
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.
21 */
22
23#define RCSID   "$Id$"
24
25#include <stdio.h>
26#include <string.h>
27#include <stdlib.h>
28#include <unistd.h>
29#include <errno.h>
30#include <fcntl.h>
31#include <termios.h>
32#include <signal.h>
33#include <sys/ioctl.h>
34#include <sys/types.h>
35#include <sys/socket.h>
36#include <sys/time.h>
37#include <sys/stat.h>
38#include <sys/param.h>
39#ifdef PPP_FILTER
40#include <net/bpf.h>
41#endif
42
43#include <net/if.h>
44#include <net/ppp_defs.h>
45#include <net/if_ppp.h>
46#include <net/route.h>
47#include <net/if_dl.h>
48#include <netinet/in.h>
49
50#if RTM_VERSION >= 3
51#include <sys/param.h>
52#if defined(NetBSD) && (NetBSD >= 199703)
53#include <netinet/if_inarp.h>
54#else   /* NetBSD 1.2D or later */
55#include <netinet/if_ether.h>
56#endif
57#endif
58
59#include <rtems.h>
60#include <rtems/rtems_bsdnet.h>
61#include <rtems/termiostypes.h>
62extern int      rtems_bsdnet_microseconds_per_tick;
63extern rtems_id rtems_pppd_taskid;
64
65#include "pppd.h"
66#include "fsm.h"
67#include "ipcp.h"
68
69static const char rcsid[] = RCSID;
70
71
72static int initdisc = -1;       /* Initial TTY discipline for ppp_fd */
73static int initfdflags = -1;    /* Initial file descriptor flags for ppp_fd */
74static int ppp_fd = -1;         /* fd which is set to PPP discipline */
75static int rtm_seq;
76
77static int restore_term;        /* 1 => we've munged the terminal */
78static struct termios inittermios; /* Initial TTY termios */
79static struct winsize wsinfo;   /* Initial window size info */
80
81static int loop_slave = -1;
82static int loop_master;
83
84static unsigned char inbuf[512]; /* buffer for chars read from loopback */
85
86static int sockfd;              /* socket for doing interface ioctls */
87
88static int if_is_up;            /* the interface is currently up */
89static u_int32_t ifaddrs[2];    /* local and remote addresses we set */
90static u_int32_t default_route_gateway; /* gateway addr for default route */
91static u_int32_t proxy_arp_addr;        /* remote addr for proxy arp */
92
93/* Prototypes for procedures local to this file. */
94static int dodefaultroute __P((u_int32_t, int));
95static int get_ether_addr __P((u_int32_t, struct sockaddr_dl *));
96
97
98/*
99 * sys_init - System-dependent initialization.
100 */
101void
102sys_init()
103{
104    /* Get an internet socket for doing socket ioctl's on. */
105    if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
106        fatal("Couldn't create IP socket: %m");
107}
108
109/*
110 * sys_cleanup - restore any system state we modified before exiting:
111 * mark the interface down, delete default route and/or proxy arp entry.
112 * This should call die() because it's called from die().
113 */
114void
115sys_cleanup()
116{
117    struct ifreq ifr;
118
119    if (if_is_up) {
120        strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
121        if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) >= 0
122            && ((ifr.ifr_flags & IFF_UP) != 0)) {
123            ifr.ifr_flags &= ~IFF_UP;
124            ioctl(sockfd, SIOCSIFFLAGS, &ifr);
125        }
126    }
127    if (ifaddrs[0] != 0)
128        cifaddr(0, ifaddrs[0], ifaddrs[1]);
129    if (default_route_gateway)
130        cifdefaultroute(0, 0, default_route_gateway);
131    if (proxy_arp_addr)
132        cifproxyarp(0, proxy_arp_addr);
133}
134
135/*
136 * sys_close - Clean up in a child process before execing.
137 */
138void
139sys_close()
140{
141    close(sockfd);
142    if (loop_slave >= 0) {
143        close(loop_slave);
144        close(loop_master);
145    }
146}
147
148/*
149 * sys_check_options - check the options that the user specified
150 */
151int
152sys_check_options()
153{
154    return 1;
155}
156
157/*
158 * ppp_available - check whether the system has any ppp interfaces
159 * (in fact we check whether we can do an ioctl on ppp0).
160 */
161int
162ppp_available()
163{
164    int s, ok;
165    struct ifreq ifr;
166
167    if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
168        return 1;               /* can't tell */
169
170    strlcpy(ifr.ifr_name, "ppp0", sizeof (ifr.ifr_name));
171    ok = ioctl(s, SIOCGIFFLAGS, (caddr_t) &ifr) >= 0;
172    close(s);
173
174    return ok;
175}
176
177/*
178 * establish_ppp - Turn the serial port into a ppp interface.
179 */
180int
181establish_ppp(fd)
182    int fd;
183{
184    int taskid  = (int)rtems_pppd_taskid;
185    int pppdisc = PPPDISC;
186    int x;
187
188    if (demand) {
189        /*
190         * Demand mode - prime the old ppp device to relinquish the unit.
191         */
192        if (ioctl(ppp_fd, PPPIOCXFERUNIT, 0) < 0)
193            fatal("ioctl(transfer ppp unit): %m");
194    }
195
196    /*
197     * Save the old line discipline of fd, and set it to PPP.
198     */
199    if (ioctl(fd, TIOCGETD, &initdisc) < 0)
200        fatal("ioctl(TIOCGETD): %m");
201    if (ioctl(fd, TIOCSETD, &pppdisc) < 0)
202        fatal("ioctl(TIOCSETD): %m");
203
204    /* set pppd taskid into the driver */
205    ioctl(fd, PPPIOCSTASK, &taskid);
206
207    if (!demand) {
208        /*
209         * Find out which interface we were given.
210         */
211        if (ioctl(fd, PPPIOCGUNIT, &pppifunit) < 0)
212            fatal("ioctl(PPPIOCGUNIT): %m");
213    } else {
214        /*
215         * Check that we got the same unit again.
216         */
217        if (ioctl(fd, PPPIOCGUNIT, &x) < 0)
218            fatal("ioctl(PPPIOCGUNIT): %m");
219        if (x != pppifunit)
220            fatal("transfer_ppp failed: wanted unit %d, got %d", pppifunit, x);
221        x = TTYDISC;
222        ioctl(loop_slave, TIOCSETD, &x);
223    }
224
225    ppp_fd = fd;
226
227    /*
228     * Enable debug in the driver if requested.
229     */
230    if (kdebugflag) {
231        if (ioctl(fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
232            warn("ioctl (PPPIOCGFLAGS): %m");
233        } else {
234            x |= (kdebugflag & 0xFF) * SC_DEBUG;
235            if (ioctl(fd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
236                warn("ioctl(PPPIOCSFLAGS): %m");
237        }
238    }
239
240    /*
241     * Set device for non-blocking reads.
242     */
243    if ((initfdflags = fcntl(fd, F_GETFL)) == -1
244        || fcntl(fd, F_SETFL, initfdflags | O_NONBLOCK) == -1) {
245        warn("Couldn't set device to non-blocking mode: %m");
246    }
247
248    return fd;
249}
250
251/*
252 * restore_loop - reattach the ppp unit to the loopback.
253 */
254void
255restore_loop()
256{
257    int x;
258
259    /*
260     * Transfer the ppp interface back to the loopback.
261     */
262    if (ioctl(ppp_fd, PPPIOCXFERUNIT, 0) < 0)
263        fatal("ioctl(transfer ppp unit): %m");
264    x = PPPDISC;
265    if (ioctl(loop_slave, TIOCSETD, &x) < 0)
266        fatal("ioctl(TIOCSETD): %m");
267
268    /*
269     * Check that we got the same unit again.
270     */
271    if (ioctl(loop_slave, PPPIOCGUNIT, &x) < 0)
272        fatal("ioctl(PPPIOCGUNIT): %m");
273    if (x != pppifunit)
274        fatal("transfer_ppp failed: wanted unit %d, got %d", pppifunit, x);
275    ppp_fd = loop_slave;
276}
277
278
279/*
280 * disestablish_ppp - Restore the serial port to normal operation.
281 * This shouldn't call die() because it's called from die().
282 */
283void
284disestablish_ppp(fd)
285    int fd;
286{
287    int taskid = (int)0;
288
289    /* clear pppd taskid from the driver */
290    ioctl(fd, PPPIOCSTASK, &taskid);
291
292    /* Reset non-blocking mode on fd. */
293    if (initfdflags != -1 && fcntl(fd, F_SETFL, initfdflags) < 0)
294        warn("Couldn't restore device fd flags: %m");
295    initfdflags = -1;
296
297    /* Restore old line discipline. */
298    if (initdisc >= 0 && ioctl(fd, TIOCSETD, &initdisc) < 0)
299        error("ioctl(TIOCSETD): %m");
300    initdisc = -1;
301
302    if (fd == ppp_fd)
303        ppp_fd = -1;
304}
305
306/*
307 * Check whether the link seems not to be 8-bit clean.
308 */
309void
310clean_check()
311{
312    int x;
313    char *s;
314
315    if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) == 0) {
316        s = NULL;
317        switch (~x & (SC_RCV_B7_0|SC_RCV_B7_1|SC_RCV_EVNP|SC_RCV_ODDP)) {
318        case SC_RCV_B7_0:
319            s = "bit 7 set to 1";
320            break;
321        case SC_RCV_B7_1:
322            s = "bit 7 set to 0";
323            break;
324        case SC_RCV_EVNP:
325            s = "odd parity";
326            break;
327        case SC_RCV_ODDP:
328            s = "even parity";
329            break;
330        }
331        if (s != NULL) {
332            warn("Serial link is not 8-bit clean:");
333            warn("All received characters had %s", s);
334        }
335    }
336}
337
338/*
339 * set_up_tty: Set up the serial port on `fd' for 8 bits, no parity,
340 * at the requested speed, etc.  If `local' is true, set CLOCAL
341 * regardless of whether the modem option was specified.
342 *
343 * For *BSD, we assume that speed_t values numerically equal bits/second.
344 */
345void
346set_up_tty(fd, local)
347    int fd, local;
348{
349    struct termios     tios;
350
351    if (tcgetattr(fd, &tios) < 0)
352        fatal("tcgetattr: %m");
353
354    if (!restore_term) {
355        inittermios = tios;
356        ioctl(fd, TIOCGWINSZ, &wsinfo);
357    }
358
359    tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL);
360    if (crtscts > 0 && !local) {
361        if (crtscts == 2) {
362#ifdef CDTRCTS
363            tios.c_cflag |= CDTRCTS;
364#endif
365        } else
366            tios.c_cflag |= CRTSCTS;
367    } else if (crtscts < 0) {
368        tios.c_cflag &= ~CRTSCTS;
369#ifdef CDTRCTS
370        tios.c_cflag &= ~CDTRCTS;
371#endif
372    }
373
374    tios.c_cflag |= CS8 | CREAD | HUPCL;
375    if (local || !modem)
376        tios.c_cflag |= CLOCAL;
377    tios.c_iflag = IGNBRK | IGNPAR;
378    tios.c_oflag = 0;
379    tios.c_lflag = 0;
380    tios.c_cc[VMIN] = 1;
381    tios.c_cc[VTIME] = 0;
382
383    if (crtscts == -2) {
384        tios.c_iflag |= IXON | IXOFF;
385        tios.c_cc[VSTOP] = 0x13;        /* DC3 = XOFF = ^S */
386        tios.c_cc[VSTART] = 0x11;       /* DC1 = XON  = ^Q */
387    }
388
389    if (inspeed) {
390        cfsetospeed(&tios, inspeed);
391        cfsetispeed(&tios, inspeed);
392    } else {
393        inspeed = cfgetospeed(&tios);
394        /*
395         * We can't proceed if the serial port speed is 0,
396         * since that implies that the serial port is disabled.
397         */
398        if (inspeed == 0)
399            fatal("Baud rate for %s is 0; need explicit baud rate", devnam);
400    }
401    baud_rate = inspeed;
402
403/*    if (tcsetattr(fd, TCSAFLUSH, &tios) < 0) {  */
404    if (tcsetattr(fd, TCSADRAIN, &tios) < 0) {
405        fatal("tcsetattr: %m");
406    }
407
408    restore_term = 1;
409}
410
411/*
412 * restore_tty - restore the terminal to the saved settings.
413 */
414void
415restore_tty(fd)
416    int fd;
417{
418    if (restore_term) {
419        if (!default_device) {
420            /*
421             * Turn off echoing, because otherwise we can get into
422             * a loop with the tty and the modem echoing to each other.
423             * We presume we are the sole user of this tty device, so
424             * when we close it, it will revert to its defaults anyway.
425             */
426            inittermios.c_lflag &= ~(ECHO | ECHONL);
427        }
428/*      if (tcsetattr(fd, TCSAFLUSH, &inittermios) < 0) { */
429        if (tcsetattr(fd, TCSADRAIN, &inittermios) < 0) {
430            if (errno != ENXIO)
431                warn("tcsetattr: %m");
432        }
433        ioctl(fd, TIOCSWINSZ, &wsinfo);
434        restore_term = 0;
435    }
436}
437
438/*
439 * setdtr - control the DTR line on the serial port.
440 * This is called from die(), so it shouldn't call die().
441 */
442void
443setdtr(fd, on)
444int fd, on;
445{
446    int modembits = TIOCM_DTR;
447
448    ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits);
449}
450
451/*
452 * get_pty - get a pty master/slave pair and chown the slave side
453 * to the uid given.  Assumes slave_name points to >= 12 bytes of space.
454 */
455int
456get_pty(master_fdp, slave_fdp, slave_name, uid)
457    int *master_fdp;
458    int *slave_fdp;
459    char *slave_name;
460    int uid;
461{
462    return 1;
463}
464
465
466/*
467 * open_ppp_loopback - open the device we use for getting
468 * packets in demand mode, and connect it to a ppp interface.
469 * Here we use a pty.
470 */
471int
472open_ppp_loopback()
473{
474    return loop_master;
475}
476
477
478/*
479 * output - Output PPP packet.
480 */
481void
482output(unit, p, len)
483    int unit;
484    u_char *p;
485    int len;
486{
487    if (debug);
488        dbglog("sent %P", p, len);
489/*    printf("sent packet [%d]\n", len); */
490
491    if (write(ttyfd, p, len) < 0) {
492        if (errno != EIO)
493            error("write: %m");
494    }
495}
496
497void
498ppp_delay(void)
499{
500  rtems_interval     ticks;
501
502  /* recommended delay to help negotiation */
503  ticks = 300000/rtems_bsdnet_microseconds_per_tick;
504  rtems_task_wake_after(ticks);
505}
506
507/*
508 * wait_input - wait until there is data available,
509 * for the length of time specified by *timo (indefinite
510 * if timo is NULL).
511 */
512void
513wait_input(timo)
514    struct timeval *timo;
515{
516  rtems_interval     ticks;
517  rtems_event_set    events;
518
519  ticks = ((timo->tv_sec*1000000)+timo->tv_usec)/rtems_bsdnet_microseconds_per_tick;
520  if ( ticks > 0 ) {
521    rtems_event_receive(RTEMS_EVENT_31, (RTEMS_EVENT_ANY|RTEMS_WAIT), ticks, &events);
522  }
523}
524
525/*
526 * read_packet - get a PPP packet from the serial device.
527 */
528int
529read_packet(buf)
530    u_char *buf;
531{
532    int len;
533
534    if ((len = read(ttyfd, buf, PPP_MTU + PPP_HDRLEN)) < 0) {
535        if (errno == EWOULDBLOCK || errno == EINTR) len = -1;
536        /*fatal("read: %m"); */
537    }
538
539/*    printf("read packet [%d]\n", len); */
540    return len;
541}
542
543
544/*
545 * get_loop_output - read characters from the loopback, form them
546 * into frames, and detect when we want to bring the real link up.
547 * Return value is 1 if we need to bring up the link, 0 otherwise.
548 */
549int
550get_loop_output()
551{
552    int rv = 0;
553    int n;
554
555    while ((n = read(loop_master, inbuf, sizeof(inbuf))) >= 0) {
556        if (loop_chars(inbuf, n))
557            rv = 1;
558    }
559
560    if (n == 0)
561        fatal("eof on loopback");
562    if (errno != EWOULDBLOCK)
563        fatal("read from loopback: %m");
564
565    return rv;
566}
567
568
569/*
570 * ppp_send_config - configure the transmit characteristics of
571 * the ppp interface.
572 */
573void
574ppp_send_config(unit, mtu, asyncmap, pcomp, accomp)
575    int unit, mtu;
576    u_int32_t asyncmap;
577    int pcomp, accomp;
578{
579    u_int x;
580    struct ifreq ifr;
581
582    strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
583    ifr.ifr_mtu = mtu;
584    if (ioctl(sockfd, SIOCSIFMTU, (caddr_t) &ifr) < 0)
585        fatal("ioctl(SIOCSIFMTU): %m");
586
587    if (ioctl(ppp_fd, PPPIOCSASYNCMAP, (caddr_t) &asyncmap) < 0)
588        fatal("ioctl(PPPIOCSASYNCMAP): %m");
589
590    if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0)
591        fatal("ioctl (PPPIOCGFLAGS): %m");
592    x = pcomp? x | SC_COMP_PROT: x &~ SC_COMP_PROT;
593    x = accomp? x | SC_COMP_AC: x &~ SC_COMP_AC;
594/*    x = sync_serial ? x | SC_SYNC : x & ~SC_SYNC; */
595    if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
596        fatal("ioctl(PPPIOCSFLAGS): %m");
597}
598
599
600/*
601 * ppp_set_xaccm - set the extended transmit ACCM for the interface.
602 */
603void
604ppp_set_xaccm(unit, accm)
605    int unit;
606    ext_accm accm;
607{
608    if (ioctl(ppp_fd, PPPIOCSXASYNCMAP, accm) < 0 && errno != ENOTTY)
609        warn("ioctl(set extended ACCM): %m");
610}
611
612
613/*
614 * ppp_recv_config - configure the receive-side characteristics of
615 * the ppp interface.
616 */
617void
618ppp_recv_config(unit, mru, asyncmap, pcomp, accomp)
619    int unit, mru;
620    u_int32_t asyncmap;
621    int pcomp, accomp;
622{
623    int x;
624
625    if (ioctl(ppp_fd, PPPIOCSMRU, (caddr_t) &mru) < 0)
626        fatal("ioctl(PPPIOCSMRU): %m");
627    if (ioctl(ppp_fd, PPPIOCSRASYNCMAP, (caddr_t) &asyncmap) < 0)
628        fatal("ioctl(PPPIOCSRASYNCMAP): %m");
629    if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0)
630        fatal("ioctl (PPPIOCGFLAGS): %m");
631    x = !accomp? x | SC_REJ_COMP_AC: x &~ SC_REJ_COMP_AC;
632    if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
633        fatal("ioctl(PPPIOCSFLAGS): %m");
634}
635
636/*
637 * ccp_test - ask kernel whether a given compression method
638 * is acceptable for use.  Returns 1 if the method and parameters
639 * are OK, 0 if the method is known but the parameters are not OK
640 * (e.g. code size should be reduced), or -1 if the method is unknown.
641 */
642int
643ccp_test(unit, opt_ptr, opt_len, for_transmit)
644    int unit, opt_len, for_transmit;
645    u_char *opt_ptr;
646{
647    struct ppp_option_data data;
648
649    data.ptr = opt_ptr;
650    data.length = opt_len;
651    data.transmit = for_transmit;
652    if (ioctl(ttyfd, PPPIOCSCOMPRESS, (caddr_t) &data) >= 0)
653        return 1;
654    return (errno == ENOBUFS)? 0: -1;
655}
656
657/*
658 * ccp_flags_set - inform kernel about the current state of CCP.
659 */
660void
661ccp_flags_set(unit, isopen, isup)
662    int unit, isopen, isup;
663{
664    int x;
665
666    if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
667        error("ioctl (PPPIOCGFLAGS): %m");
668        return;
669    }
670    x = isopen? x | SC_CCP_OPEN: x &~ SC_CCP_OPEN;
671    x = isup? x | SC_CCP_UP: x &~ SC_CCP_UP;
672    if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0)
673        error("ioctl(PPPIOCSFLAGS): %m");
674}
675
676/*
677 * ccp_fatal_error - returns 1 if decompression was disabled as a
678 * result of an error detected after decompression of a packet,
679 * 0 otherwise.  This is necessary because of patent nonsense.
680 */
681int
682ccp_fatal_error(unit)
683    int unit;
684{
685    int x;
686
687    if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
688        error("ioctl(PPPIOCGFLAGS): %m");
689        return 0;
690    }
691    return x & SC_DC_FERROR;
692}
693
694/*
695 * get_idle_time - return how long the link has been idle.
696 */
697int
698get_idle_time(u, ip)
699    int u;
700    struct ppp_idle *ip;
701{
702    return ioctl(ppp_fd, PPPIOCGIDLE, ip) >= 0;
703}
704
705/*
706 * get_ppp_stats - return statistics for the link.
707 */
708int
709get_ppp_stats(u, stats)
710    int u;
711    struct pppd_stats *stats;
712{
713    struct ifpppstatsreq req;
714
715    memset (&req, 0, sizeof (req));
716    strlcpy(req.ifr_name, ifname, sizeof(req.ifr_name));
717    if (ioctl(sockfd, SIOCGPPPSTATS, &req) < 0) {
718        error("Couldn't get PPP statistics: %m");
719        return 0;
720    }
721    stats->bytes_in = req.stats.p.ppp_ibytes;
722    stats->bytes_out = req.stats.p.ppp_obytes;
723    return 1;
724}
725
726
727#ifdef PPP_FILTER
728/*
729 * set_filters - transfer the pass and active filters to the kernel.
730 */
731int
732set_filters(pass, active)
733    struct bpf_program *pass, *active;
734{
735    int ret = 1;
736
737    if (pass->bf_len > 0) {
738        if (ioctl(ppp_fd, PPPIOCSPASS, pass) < 0) {
739            error("Couldn't set pass-filter in kernel: %m");
740            ret = 0;
741        }
742    }
743    if (active->bf_len > 0) {
744        if (ioctl(ppp_fd, PPPIOCSACTIVE, active) < 0) {
745            error("Couldn't set active-filter in kernel: %m");
746            ret = 0;
747        }
748    }
749    return ret;
750}
751#endif
752
753/*
754 * sifvjcomp - config tcp header compression
755 */
756int
757sifvjcomp(u, vjcomp, cidcomp, maxcid)
758    int u, vjcomp, cidcomp, maxcid;
759{
760    u_int x;
761
762    if (ioctl(ppp_fd, PPPIOCGFLAGS, (caddr_t) &x) < 0) {
763        error("ioctl (PPPIOCGFLAGS): %m");
764        return 0;
765    }
766    x = vjcomp ? x | SC_COMP_TCP: x &~ SC_COMP_TCP;
767    x = cidcomp? x & ~SC_NO_TCP_CCID: x | SC_NO_TCP_CCID;
768    if (ioctl(ppp_fd, PPPIOCSFLAGS, (caddr_t) &x) < 0) {
769        error("ioctl(PPPIOCSFLAGS): %m");
770        return 0;
771    }
772    if (vjcomp && ioctl(ppp_fd, PPPIOCSMAXCID, (caddr_t) &maxcid) < 0) {
773        error("ioctl(PPPIOCSFLAGS): %m");
774        return 0;
775    }
776    return 1;
777}
778
779/*
780 * sifup - Config the interface up and enable IP packets to pass.
781 */
782int
783sifup(u)
784    int u;
785{
786    struct ifreq ifr;
787
788    strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
789    if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
790        error("ioctl (SIOCGIFFLAGS): %m");
791        return 0;
792    }
793    ifr.ifr_flags |= IFF_UP;
794    if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
795        error("ioctl(SIOCSIFFLAGS): %m");
796        return 0;
797    }
798    if_is_up = 1;
799    return 1;
800}
801
802/*
803 * sifnpmode - Set the mode for handling packets for a given NP.
804 */
805int
806sifnpmode(u, proto, mode)
807    int u;
808    int proto;
809    enum NPmode mode;
810{
811    struct npioctl npi;
812
813    npi.protocol = proto;
814    npi.mode = mode;
815    if (ioctl(ppp_fd, PPPIOCSNPMODE, &npi) < 0) {
816        error("ioctl(set NP %d mode to %d): %m", proto, mode);
817        return 0;
818    }
819    return 1;
820}
821
822/*
823 * sifdown - Config the interface down and disable IP.
824 */
825int
826sifdown(u)
827    int u;
828{
829    struct ifreq ifr;
830    int rv;
831    struct npioctl npi;
832
833    rv = 1;
834    npi.protocol = PPP_IP;
835    npi.mode = NPMODE_ERROR;
836    ioctl(ppp_fd, PPPIOCSNPMODE, (caddr_t) &npi);
837    /* ignore errors, because ppp_fd might have been closed by now. */
838
839    strlcpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
840    if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
841        error("ioctl (SIOCGIFFLAGS): %m");
842        rv = 0;
843    } else {
844        ifr.ifr_flags &= ~IFF_UP;
845        if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
846            error("ioctl(SIOCSIFFLAGS): %m");
847            rv = 0;
848        } else
849            if_is_up = 0;
850    }
851    return rv;
852}
853
854/*
855 * SET_SA_FAMILY - set the sa_family field of a struct sockaddr,
856 * if it exists.
857 */
858#define SET_SA_FAMILY(addr, family)             \
859    BZERO((char *) &(addr), sizeof(addr));      \
860    addr.sa_family = (family);                  \
861    addr.sa_len = sizeof(addr);
862
863/*
864 * sifaddr - Config the interface IP addresses and netmask.
865 */
866int
867sifaddr(u, o, h, m)
868    int u;
869    u_int32_t o, h, m;
870{
871    struct ifaliasreq ifra;
872    struct ifreq ifr;
873
874    strlcpy(ifra.ifra_name, ifname, sizeof(ifra.ifra_name));
875    SET_SA_FAMILY(ifra.ifra_addr, AF_INET);
876    ((struct sockaddr_in *) &ifra.ifra_addr)->sin_addr.s_addr = o;
877    SET_SA_FAMILY(ifra.ifra_broadaddr, AF_INET);
878    ((struct sockaddr_in *) &ifra.ifra_broadaddr)->sin_addr.s_addr = h;
879    if (m != 0) {
880        SET_SA_FAMILY(ifra.ifra_mask, AF_INET);
881        ((struct sockaddr_in *) &ifra.ifra_mask)->sin_addr.s_addr = m;
882    } else
883        BZERO(&ifra.ifra_mask, sizeof(ifra.ifra_mask));
884    BZERO(&ifr, sizeof(ifr));
885    strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
886    if (ioctl(sockfd, SIOCDIFADDR, (caddr_t) &ifr) < 0) {
887        if (errno != EADDRNOTAVAIL)
888            warn("Couldn't remove interface address: %m");
889    }
890    if (ioctl(sockfd, SIOCAIFADDR, (caddr_t) &ifra) < 0) {
891        if (errno != EEXIST) {
892            error("Couldn't set interface address: %m");
893            return 0;
894        }
895        warn("Couldn't set interface address: Address %I already exists", o);
896    }
897    ifaddrs[0] = o;
898    ifaddrs[1] = h;
899    return 1;
900}
901
902/*
903 * cifaddr - Clear the interface IP addresses, and delete routes
904 * through the interface if possible.
905 */
906int
907cifaddr(u, o, h)
908    int u;
909    u_int32_t o, h;
910{
911    struct ifaliasreq ifra;
912
913    ifaddrs[0] = 0;
914    strlcpy(ifra.ifra_name, ifname, sizeof(ifra.ifra_name));
915    SET_SA_FAMILY(ifra.ifra_addr, AF_INET);
916    ((struct sockaddr_in *) &ifra.ifra_addr)->sin_addr.s_addr = o;
917    SET_SA_FAMILY(ifra.ifra_broadaddr, AF_INET);
918    ((struct sockaddr_in *) &ifra.ifra_broadaddr)->sin_addr.s_addr = h;
919    BZERO(&ifra.ifra_mask, sizeof(ifra.ifra_mask));
920    if (ioctl(sockfd, SIOCDIFADDR, (caddr_t) &ifra) < 0) {
921        if (errno != EADDRNOTAVAIL)
922            warn("Couldn't delete interface address: %m");
923        return 0;
924    }
925    return 1;
926}
927
928/*
929 * sifdefaultroute - assign a default route through the address given.
930 */
931int
932sifdefaultroute(u, l, g)
933    int u;
934    u_int32_t l, g;
935{
936    return dodefaultroute(g, 's');
937}
938
939/*
940 * cifdefaultroute - delete a default route through the address given.
941 */
942int
943cifdefaultroute(u, l, g)
944    int u;
945    u_int32_t l, g;
946{
947    return dodefaultroute(g, 'c');
948}
949
950/*
951 * dodefaultroute - talk to a routing socket to add/delete a default route.
952 */
953static int
954dodefaultroute(g, cmd)
955    u_int32_t g;
956    int cmd;
957{
958/*    int    status;  */
959    struct sockaddr_in address;
960    struct sockaddr_in netmask;
961    struct sockaddr_in gateway;
962
963    memset((void *) &address, 0, sizeof(address));
964    address.sin_len = sizeof address;
965    address.sin_family = AF_INET;
966    address.sin_addr.s_addr = INADDR_ANY;
967
968    memset((void *) &netmask, 0, sizeof(netmask));
969    netmask.sin_len = sizeof netmask;
970    netmask.sin_addr.s_addr = INADDR_ANY; 
971    netmask.sin_family = AF_INET;
972
973    if (cmd=='s') {     
974      memset((void *) &gateway, 0, sizeof(gateway));
975      gateway.sin_len = sizeof gateway;
976      gateway.sin_family = AF_INET;
977      gateway.sin_addr.s_addr = g;
978
979      rtems_bsdnet_rtrequest(RTM_ADD,
980                             (struct sockaddr *)&address,
981                             (struct sockaddr *)&gateway,
982                             (struct sockaddr *)&netmask,
983                             (RTF_UP|RTF_GATEWAY|RTF_STATIC), NULL);
984    }
985    else {
986      memset((void *) &gateway, 0, sizeof(gateway));
987      gateway.sin_len = sizeof gateway;
988      gateway.sin_family = AF_INET;
989      gateway.sin_addr.s_addr =  INADDR_ANY;
990
991      rtems_bsdnet_rtrequest(RTM_DELETE,
992                             (struct sockaddr *)&address,
993                             (struct sockaddr *)&gateway,
994                             (struct sockaddr *)&netmask,
995                             (RTF_UP|RTF_STATIC), NULL);
996    }
997
998    default_route_gateway = (cmd == 's')? g: 0;
999
1000    return 1;
1001}
1002
1003#if RTM_VERSION >= 3
1004
1005/*
1006 * sifproxyarp - Make a proxy ARP entry for the peer.
1007 */
1008static struct {
1009    struct rt_msghdr            hdr;
1010    struct sockaddr_inarp       dst;
1011    struct sockaddr_dl          hwa;
1012    char                        extra[128];
1013} arpmsg;
1014
1015static int arpmsg_valid;
1016
1017int
1018sifproxyarp(unit, hisaddr)
1019    int unit;
1020    u_int32_t hisaddr;
1021{
1022    int routes;
1023
1024    /*
1025     * Get the hardware address of an interface on the same subnet
1026     * as our local address.
1027     */
1028    memset(&arpmsg, 0, sizeof(arpmsg));
1029    if (!get_ether_addr(hisaddr, &arpmsg.hwa)) {
1030        error("Cannot determine ethernet address for proxy ARP");
1031        return 0;
1032    }
1033
1034    if ((routes = socket(PF_ROUTE, SOCK_RAW, AF_INET)) < 0) {
1035        error("Couldn't add proxy arp entry: socket: %m");
1036        return 0;
1037    }
1038
1039    arpmsg.hdr.rtm_type = RTM_ADD;
1040    arpmsg.hdr.rtm_flags = RTF_ANNOUNCE | RTF_HOST | RTF_STATIC;
1041    arpmsg.hdr.rtm_version = RTM_VERSION;
1042    arpmsg.hdr.rtm_seq = ++rtm_seq;
1043    arpmsg.hdr.rtm_addrs = RTA_DST | RTA_GATEWAY;
1044    arpmsg.hdr.rtm_inits = RTV_EXPIRE;
1045    arpmsg.dst.sin_len = sizeof(struct sockaddr_inarp);
1046    arpmsg.dst.sin_family = AF_INET;
1047    arpmsg.dst.sin_addr.s_addr = hisaddr;
1048    arpmsg.dst.sin_other = SIN_PROXY;
1049
1050    arpmsg.hdr.rtm_msglen = (char *) &arpmsg.hwa - (char *) &arpmsg
1051        + arpmsg.hwa.sdl_len;
1052    if (write(routes, &arpmsg, arpmsg.hdr.rtm_msglen) < 0) {
1053        error("Couldn't add proxy arp entry: %m");
1054        close(routes);
1055        return 0;
1056    }
1057
1058    close(routes);
1059    arpmsg_valid = 1;
1060    proxy_arp_addr = hisaddr;
1061    return 1;
1062}
1063
1064/*
1065 * cifproxyarp - Delete the proxy ARP entry for the peer.
1066 */
1067int
1068cifproxyarp(unit, hisaddr)
1069    int unit;
1070    u_int32_t hisaddr;
1071{
1072    int routes;
1073
1074    if (!arpmsg_valid)
1075        return 0;
1076    arpmsg_valid = 0;
1077
1078    arpmsg.hdr.rtm_type = RTM_DELETE;
1079    arpmsg.hdr.rtm_seq = ++rtm_seq;
1080
1081    if ((routes = socket(PF_ROUTE, SOCK_RAW, AF_INET)) < 0) {
1082        error("Couldn't delete proxy arp entry: socket: %m");
1083        return 0;
1084    }
1085
1086    if (write(routes, &arpmsg, arpmsg.hdr.rtm_msglen) < 0) {
1087        error("Couldn't delete proxy arp entry: %m");
1088        close(routes);
1089        return 0;
1090    }
1091
1092    close(routes);
1093    proxy_arp_addr = 0;
1094    return 1;
1095}
1096
1097#else   /* RTM_VERSION */
1098
1099/*
1100 * sifproxyarp - Make a proxy ARP entry for the peer.
1101 */
1102int
1103sifproxyarp(unit, hisaddr)
1104    int unit;
1105    u_int32_t hisaddr;
1106{
1107    struct arpreq arpreq;
1108    struct {
1109        struct sockaddr_dl      sdl;
1110        char                    space[128];
1111    } dls;
1112
1113    BZERO(&arpreq, sizeof(arpreq));
1114
1115    /*
1116     * Get the hardware address of an interface on the same subnet
1117     * as our local address.
1118     */
1119    if (!get_ether_addr(hisaddr, &dls.sdl)) {
1120        error("Cannot determine ethernet address for proxy ARP");
1121        return 0;
1122    }
1123
1124    arpreq.arp_ha.sa_len = sizeof(struct sockaddr);
1125    arpreq.arp_ha.sa_family = AF_UNSPEC;
1126    BCOPY(LLADDR(&dls.sdl), arpreq.arp_ha.sa_data, dls.sdl.sdl_alen);
1127    SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
1128    ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
1129    arpreq.arp_flags = ATF_PERM | ATF_PUBL;
1130    if (ioctl(sockfd, SIOCSARP, (caddr_t)&arpreq) < 0) {
1131        error("Couldn't add proxy arp entry: %m");
1132        return 0;
1133    }
1134
1135    proxy_arp_addr = hisaddr;
1136    return 1;
1137}
1138
1139/*
1140 * cifproxyarp - Delete the proxy ARP entry for the peer.
1141 */
1142int
1143cifproxyarp(unit, hisaddr)
1144    int unit;
1145    u_int32_t hisaddr;
1146{
1147    struct arpreq arpreq;
1148
1149    BZERO(&arpreq, sizeof(arpreq));
1150    SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
1151    ((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
1152    if (ioctl(sockfd, SIOCDARP, (caddr_t)&arpreq) < 0) {
1153        warn("Couldn't delete proxy arp entry: %m");
1154        return 0;
1155    }
1156    proxy_arp_addr = 0;
1157    return 1;
1158}
1159#endif  /* RTM_VERSION */
1160
1161
1162/*
1163 * get_ether_addr - get the hardware address of an interface on the
1164 * the same subnet as ipaddr.
1165 */
1166#define MAX_IFS         32
1167
1168static int
1169get_ether_addr(ipaddr, hwaddr)
1170    u_int32_t ipaddr;
1171    struct sockaddr_dl *hwaddr;
1172{
1173    struct ifreq *ifr, *ifend, *ifp;
1174    u_int32_t ina, mask;
1175    struct sockaddr_dl *dla;
1176    struct ifreq ifreq;
1177    struct ifconf ifc;
1178    struct ifreq ifs[MAX_IFS];
1179
1180    ifc.ifc_len = sizeof(ifs);
1181    ifc.ifc_req = ifs;
1182    if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1183        error("ioctl(SIOCGIFCONF): %m");
1184        return 0;
1185    }
1186
1187    /*
1188     * Scan through looking for an interface with an Internet
1189     * address on the same subnet as `ipaddr'.
1190     */
1191    ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1192    for (ifr = ifc.ifc_req; ifr < ifend; ifr = (struct ifreq *)
1193                ((char *)&ifr->ifr_addr + ifr->ifr_addr.sa_len)) {
1194        if (ifr->ifr_addr.sa_family == AF_INET) {
1195            ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
1196            strlcpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1197            /*
1198             * Check that the interface is up, and not point-to-point
1199             * or loopback.
1200             */
1201            if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1202                continue;
1203            if ((ifreq.ifr_flags &
1204                 (IFF_UP|IFF_BROADCAST|IFF_POINTOPOINT|IFF_LOOPBACK|IFF_NOARP))
1205                 != (IFF_UP|IFF_BROADCAST))
1206                continue;
1207            /*
1208             * Get its netmask and check that it's on the right subnet.
1209             */
1210            if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1211                continue;
1212            mask = ((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr.s_addr;
1213            if ((ipaddr & mask) != (ina & mask))
1214                continue;
1215
1216            break;
1217        }
1218    }
1219
1220    if (ifr >= ifend)
1221        return 0;
1222    info("found interface %s for proxy arp", ifr->ifr_name);
1223
1224    /*
1225     * Now scan through again looking for a link-level address
1226     * for this interface.
1227     */
1228    ifp = ifr;
1229    for (ifr = ifc.ifc_req; ifr < ifend; ) {
1230        if (strcmp(ifp->ifr_name, ifr->ifr_name) == 0
1231            && ifr->ifr_addr.sa_family == AF_LINK) {
1232            /*
1233             * Found the link-level address - copy it out
1234             */
1235            dla = (struct sockaddr_dl *) &ifr->ifr_addr;
1236            BCOPY(dla, hwaddr, dla->sdl_len);
1237            return 1;
1238        }
1239        ifr = (struct ifreq *) ((char *)&ifr->ifr_addr + ifr->ifr_addr.sa_len);
1240    }
1241
1242    return 0;
1243}
1244
1245/*
1246 * Return user specified netmask, modified by any mask we might determine
1247 * for address `addr' (in network byte order).
1248 * Here we scan through the system's list of interfaces, looking for
1249 * any non-point-to-point interfaces which might appear to be on the same
1250 * network as `addr'.  If we find any, we OR in their netmask to the
1251 * user-specified netmask.
1252 */
1253u_int32_t
1254GetMask(addr)
1255    u_int32_t addr;
1256{
1257    u_int32_t mask, nmask, ina;
1258    struct ifreq *ifr, *ifend, ifreq;
1259    struct ifconf ifc;
1260    struct ifreq ifs[MAX_IFS];
1261
1262    addr = ntohl(addr);
1263    if (IN_CLASSA(addr))        /* determine network mask for address class */
1264        nmask = IN_CLASSA_NET;
1265    else if (IN_CLASSB(addr))
1266        nmask = IN_CLASSB_NET;
1267    else
1268        nmask = IN_CLASSC_NET;
1269    /* class D nets are disallowed by bad_ip_adrs */
1270    mask = netmask | htonl(nmask);
1271
1272    /*
1273     * Scan through the system's network interfaces.
1274     */
1275    ifc.ifc_len = sizeof(ifs);
1276    ifc.ifc_req = ifs;
1277    if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
1278        warn("ioctl(SIOCGIFCONF): %m");
1279        return mask;
1280    }
1281    ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
1282    for (ifr = ifc.ifc_req; ifr < ifend; ifr = (struct ifreq *)
1283                ((char *)&ifr->ifr_addr + ifr->ifr_addr.sa_len)) {
1284        /*
1285         * Check the interface's internet address.
1286         */
1287        if (ifr->ifr_addr.sa_family != AF_INET)
1288            continue;
1289        ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
1290        if ((ntohl(ina) & nmask) != (addr & nmask))
1291            continue;
1292        /*
1293         * Check that the interface is up, and not point-to-point or loopback.
1294         */
1295        strlcpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
1296        if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
1297            continue;
1298        if ((ifreq.ifr_flags & (IFF_UP|IFF_POINTOPOINT|IFF_LOOPBACK))
1299            != IFF_UP)
1300            continue;
1301        /*
1302         * Get its netmask and OR it into our mask.
1303         */
1304        if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
1305            continue;
1306        mask |= ((struct sockaddr_in *)&ifreq.ifr_addr)->sin_addr.s_addr;
1307    }
1308
1309    return mask;
1310}
1311
1312/*
1313 * have_route_to - determine if the system has any route to
1314 * a given IP address.
1315 * For demand mode to work properly, we have to ignore routes
1316 * through our own interface.
1317 */
1318int have_route_to(u_int32_t addr)
1319{
1320    return -1;
1321}
1322
1323/*
1324 * Use the hostid as part of the random number seed.
1325 */
1326int
1327get_host_seed()
1328{
1329    return 17;
1330}
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