source: rtems/c/src/exec/libnetworking/nfs/bootp_subr.c @ 4bde2394

4.104.114.84.95
Last change on this file since 4bde2394 was 4bde2394, checked in by Joel Sherrill <joel.sherrill@…>, on 09/19/01 at 17:30:38

2001-09-19 Chris Johns <ccj@…>

  • nfs/bootp_subr.c, rtems/rtems_bootp.c, rtems/rtems_bsdnet.h, rtems/rtems_bsdnet_internal.h Added support for populating the initial "root" filesystem with information obtained via the DHCP response.
  • Property mode set to 100644
File size: 28.4 KB
Line 
1/*      $Id$    */
2
3/*
4 * Copyright (c) 1995 Gordon Ross, Adam Glass
5 * Copyright (c) 1992 Regents of the University of California.
6 * All rights reserved.
7 *
8 * This software was developed by the Computer Systems Engineering group
9 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
10 * contributed to Berkeley.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 *    notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 *    notice, this list of conditions and the following disclaimer in the
19 *    documentation and/or other materials provided with the distribution.
20 * 3. All advertising materials mentioning features or use of this software
21 *    must display the following acknowledgement:
22 *      This product includes software developed by the University of
23 *      California, Lawrence Berkeley Laboratory and its contributors.
24 * 4. Neither the name of the University nor the names of its contributors
25 *    may be used to endorse or promote products derived from this software
26 *    without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * SUCH DAMAGE.
39 *
40 * based on:
41 *      nfs/krpc_subr.c
42 *      $NetBSD: krpc_subr.c,v 1.10 1995/08/08 20:43:43 gwr Exp $
43 */
44
45#include <sys/param.h>
46#include <sys/systm.h>
47#include <sys/kernel.h>
48#include <sys/conf.h>
49#include <sys/sockio.h>
50#include <sys/proc.h>
51#include <sys/mount.h>
52#include <sys/mbuf.h>
53#include <sys/reboot.h>
54#include <sys/socket.h>
55#include <sys/socketvar.h>
56
57#include <net/if.h>
58#include <net/route.h>
59
60#include <netinet/in.h>
61#include <net/if_types.h>
62#include <net/if_dl.h>
63#include <netinet/if_ether.h>
64
65#include <nfs/rpcv2.h>
66#include <nfs/nfsproto.h>
67#include <nfs/nfs.h>
68#include <nfs/nfsdiskless.h>
69#include <nfs/krpc.h>
70#include <nfs/xdr_subs.h>
71
72#include <sys/stat.h>
73#include <sys/types.h>
74#include <fcntl.h>
75#include <rtems/mkrootfs.h>
76
77#define BOOTP_MIN_LEN           300     /* Minimum size of bootp udp packet */
78
79/*
80 * What is the longest we will wait before re-sending a request?
81 * Note this is also the frequency of "RPC timeout" messages.
82 * The re-send loop count sup linearly to this maximum, so the
83 * first complaint will happen after (1+2+3+4+5)=15 seconds.
84 */
85#define MAX_RESEND_DELAY 5      /* seconds */
86
87/* Definitions from RFC951 */
88struct bootp_packet {
89  u_int8_t op;
90  u_int8_t htype;
91  u_int8_t hlen;
92  u_int8_t hops;
93  u_int32_t xid;
94  u_int16_t secs;
95  u_int16_t flags;
96  struct in_addr ciaddr;
97  struct in_addr yiaddr;
98  struct in_addr siaddr;
99  struct in_addr giaddr;
100  unsigned char chaddr[16];
101  char sname[64];
102  char file[128];
103  unsigned char vend[256];
104};
105
106#define IPPORT_BOOTPC 68
107#define IPPORT_BOOTPS 67
108
109extern int nfs_diskless_valid;
110extern struct nfsv3_diskless nfsv3_diskless;
111
112/* mountd RPC */
113#if !defined(__rtems__)
114static int md_mount __P((struct sockaddr_in *mdsin, char *path,
115        u_char *fhp, int *fhsizep, struct nfs_args *args,struct proc *procp));
116static int md_lookup_swap __P((struct sockaddr_in *mdsin,char *path,
117                               u_char *fhp, int *fhsizep,
118                               struct nfs_args *args,
119                               struct proc *procp));
120static int setfs __P((struct sockaddr_in *addr, char *path, char *p));
121static int getdec __P((char **ptr));
122#endif
123static char *substr __P((char *a,char *b));
124#if !defined(__rtems__)
125static void mountopts __P((struct nfs_args *args, char *p));
126static int xdr_opaque_decode __P((struct mbuf **ptr,u_char *buf,
127                                  int len));
128static int xdr_int_decode __P((struct mbuf **ptr,int *iptr));
129#endif
130static void printip __P((char *prefix,struct in_addr addr));
131
132#ifdef BOOTP_DEBUG
133void bootpboot_p_sa(struct sockaddr *sa,struct sockaddr *ma);
134void bootpboot_p_ma(struct sockaddr *ma);
135void bootpboot_p_rtentry(struct rtentry *rt);
136void bootpboot_p_tree(struct radix_node *rn);
137void bootpboot_p_rtlist(void);
138void bootpboot_p_iflist(void);
139#endif
140
141int  bootpc_call(struct bootp_packet *call,
142                 struct bootp_packet *reply,
143                 struct proc *procp);
144
145int bootpc_fakeup_interface(struct ifreq *ireq,struct socket *so,
146                        struct proc *procp);
147
148int
149bootpc_adjust_interface(struct ifreq *ireq,struct socket *so,
150                        struct sockaddr_in *myaddr,
151                        struct sockaddr_in *netmask,
152                        struct sockaddr_in *gw,
153                        struct proc *procp);
154
155void bootpc_init(int update_files);
156
157#ifdef BOOTP_DEBUG
158void bootpboot_p_sa(sa,ma)
159     struct sockaddr *sa;
160     struct sockaddr *ma;
161{
162  if (!sa) {
163    printf("(sockaddr *) <null>");
164    return;
165  }
166  switch (sa->sa_family) {
167  case AF_INET:
168    {
169      struct sockaddr_in *sin = (struct sockaddr_in *) sa;
170      printf("inet %x",ntohl(sin->sin_addr.s_addr));
171      if (ma) {
172        struct sockaddr_in *sin = (struct sockaddr_in *) ma;
173        printf(" mask %x",ntohl(sin->sin_addr.s_addr));
174      }
175    }
176  break;
177  case AF_LINK:
178    {
179      struct sockaddr_dl *sli = (struct sockaddr_dl *) sa;
180      int i;
181      printf("link %.*s ",sli->sdl_nlen,sli->sdl_data);
182      for (i=0;i<sli->sdl_alen;i++) {
183        if (i>0)
184          printf(":");
185        printf("%x",(unsigned char) sli->sdl_data[i+sli->sdl_nlen]);
186      }
187    }
188  break;
189  default:
190    printf("af%d",sa->sa_family);
191  }
192}
193
194void bootpboot_p_ma(ma)
195     struct sockaddr *ma;
196{
197  if (!ma) {
198    printf("<null>");
199    return;
200  }
201  printf("%x",*(int*)ma);
202}
203
204void bootpboot_p_rtentry(rt)
205     struct rtentry *rt;
206{
207  bootpboot_p_sa(rt_key(rt),rt_mask(rt));
208  printf(" ");
209  bootpboot_p_ma(rt->rt_genmask);
210  printf(" ");
211  bootpboot_p_sa(rt->rt_gateway,NULL);
212  printf(" ");
213  printf("flags %x",(unsigned short) rt->rt_flags);
214  printf(" %d",rt->rt_rmx.rmx_expire);
215  printf(" %s%d\n",rt->rt_ifp->if_name,rt->rt_ifp->if_unit);
216}
217void  bootpboot_p_tree(rn)
218     struct radix_node *rn;
219{
220  while (rn) {
221    if (rn->rn_b < 0) {
222      if (rn->rn_flags & RNF_ROOT) {
223      } else {
224        bootpboot_p_rtentry((struct rtentry *) rn);
225      }
226      rn = rn->rn_dupedkey;
227    } else {
228      bootpboot_p_tree(rn->rn_l);
229      bootpboot_p_tree(rn->rn_r);
230      return;
231    }
232   
233  }
234}
235
236void bootpboot_p_rtlist(void)
237{
238  printf("Routing table:\n");
239  bootpboot_p_tree(rt_tables[AF_INET]->rnh_treetop);
240}
241
242void bootpboot_p_iflist(void)
243{
244  struct ifnet *ifp;
245  struct ifaddr *ifa;
246  printf("Interface list:\n");
247  for (ifp = TAILQ_FIRST(&ifnet); ifp != 0; ifp = TAILQ_NEXT(ifp,if_link))
248    {
249      for (ifa = TAILQ_FIRST(&ifp->if_addrhead) ;ifa;
250           ifa=TAILQ_NEXT(ifa,ifa_link))
251        if (ifa->ifa_addr->sa_family == AF_INET ) {
252          printf("%s%d flags %x, addr %x, bcast %x, net %x\n",
253                 ifp->if_name,ifp->if_unit,
254                 (unsigned short) ifp->if_flags,
255                 ntohl(((struct sockaddr_in *) ifa->ifa_addr)->sin_addr.s_addr),
256                 ntohl(((struct sockaddr_in *) ifa->ifa_dstaddr)->sin_addr.s_addr),
257                 ntohl(((struct sockaddr_in *) ifa->ifa_netmask)->sin_addr.s_addr)
258                 );
259        }
260    }
261}
262#endif
263
264int
265bootpc_call(call,reply,procp)
266     struct bootp_packet *call;
267     struct bootp_packet *reply;        /* output */
268     struct proc *procp;
269{
270        struct socket *so;
271        struct sockaddr_in *sin;
272        struct mbuf *m, *nam;
273        struct uio auio;
274        struct iovec aio;
275        int error, rcvflg, timo, secs, len;
276
277        /* Free at end if not null. */
278        nam = NULL;
279
280        /*
281         * Create socket and set its recieve timeout.
282         */
283        if ((error = socreate(AF_INET, &so, SOCK_DGRAM, 0,procp)))
284                goto out;
285
286        m = m_get(M_WAIT, MT_SOOPTS);
287        if (m == NULL) {
288                error = ENOBUFS;
289                goto out;
290        } else {
291                struct timeval *tv;
292                tv = mtod(m, struct timeval *);
293                m->m_len = sizeof(*tv);
294                tv->tv_sec = 1;
295                tv->tv_usec = 0;
296                if ((error = sosetopt(so, SOL_SOCKET, SO_RCVTIMEO, m)))
297                        goto out;
298        }
299
300        /*
301         * Enable broadcast.
302         */
303        {
304                int *on;
305                m = m_get(M_WAIT, MT_SOOPTS);
306                if (m == NULL) {
307                        error = ENOBUFS;
308                        goto out;
309                }
310                on = mtod(m, int *);
311                m->m_len = sizeof(*on);
312                *on = 1;
313                if ((error = sosetopt(so, SOL_SOCKET, SO_BROADCAST, m)))
314                        goto out;
315        }
316
317        /*
318         * Bind the local endpoint to a bootp client port.
319         */
320        m = m_getclr(M_WAIT, MT_SONAME);
321        sin = mtod(m, struct sockaddr_in *);
322        sin->sin_len = m->m_len = sizeof(*sin);
323        sin->sin_family = AF_INET;
324        sin->sin_addr.s_addr = INADDR_ANY;
325        sin->sin_port = htons(IPPORT_BOOTPC);
326        error = sobind(so, m);
327        m_freem(m);
328        if (error) {
329                printf("bind failed\n");
330                goto out;
331        }
332
333        /*
334         * Setup socket address for the server.
335         */
336        nam = m_get(M_WAIT, MT_SONAME);
337        if (nam == NULL) {
338                error = ENOBUFS;
339                goto out;
340        }
341        sin = mtod(nam, struct sockaddr_in *);
342        sin-> sin_len = sizeof(*sin);
343        sin-> sin_family = AF_INET;
344        sin->sin_addr.s_addr = INADDR_BROADCAST;
345        sin->sin_port = htons(IPPORT_BOOTPS);
346
347        nam->m_len = sizeof(*sin);
348
349        /*
350         * Send it, repeatedly, until a reply is received,
351         * but delay each re-send by an increasing amount.
352         * If the delay hits the maximum, start complaining.
353         */
354        timo = 0;
355        for (;;) {
356                /* Send BOOTP request (or re-send). */
357               
358                aio.iov_base = (caddr_t) call;
359                aio.iov_len = sizeof(*call);
360               
361                auio.uio_iov = &aio;
362                auio.uio_iovcnt = 1;
363                auio.uio_segflg = UIO_SYSSPACE;
364                auio.uio_rw = UIO_WRITE;
365                auio.uio_offset = 0;
366                auio.uio_resid = sizeof(*call);
367                auio.uio_procp = procp;
368
369                error = sosend(so, nam, &auio, NULL, NULL, 0);
370                if (error) {
371                        printf("bootpc_call: sosend: %d\n", error);
372                        goto out;
373                }
374
375                /* Determine new timeout. */
376                if (timo < MAX_RESEND_DELAY)
377                        timo++;
378                else
379                        printf("BOOTP timeout for server 0x%x\n",
380                               (int)ntohl(sin->sin_addr.s_addr));
381
382                /*
383                 * Wait for up to timo seconds for a reply.
384                 * The socket receive timeout was set to 1 second.
385                 */
386                secs = timo;
387                while (secs > 0) {
388                        aio.iov_base = (caddr_t) reply;
389                        aio.iov_len = sizeof(*reply);
390
391                        auio.uio_iov = &aio;
392                        auio.uio_iovcnt = 1;
393                        auio.uio_segflg = UIO_SYSSPACE;
394                        auio.uio_rw = UIO_READ;
395                        auio.uio_offset = 0;
396                        auio.uio_resid = sizeof(*reply);
397                        auio.uio_procp = procp;
398                       
399                        rcvflg = 0;
400                        error = soreceive(so, NULL, &auio, NULL, NULL, &rcvflg);
401                        if (error == EWOULDBLOCK) {
402                                secs--;
403                                call->secs=htons(ntohs(call->secs)+1);
404                                continue;
405                        }
406                        if (error)
407                                goto out;
408                        len = sizeof(*reply) - auio.uio_resid;
409
410                        /* Do we have the required number of bytes ? */
411                        if (len < BOOTP_MIN_LEN)
412                                continue;
413
414                        /* Is it the right reply? */
415                        if (reply->op != 2)
416                          continue;
417
418                        if (reply->xid != call->xid)
419                                continue;
420
421                        if (reply->hlen != call->hlen)
422                          continue;
423
424                        if (bcmp(reply->chaddr,call->chaddr,call->hlen))
425                          continue;
426
427                        goto gotreply;  /* break two levels */
428
429                } /* while secs */
430        } /* forever send/receive */
431
432        error = ETIMEDOUT;
433        goto out;
434
435 gotreply:
436 out:
437        if (nam) m_freem(nam);
438        soclose(so);
439        return error;
440}
441
442int
443bootpc_fakeup_interface(struct ifreq *ireq,struct socket *so,
444                        struct proc *procp)
445{
446  struct sockaddr_in *sin;
447  int error;
448  struct sockaddr_in dst;
449  struct sockaddr_in gw;
450  struct sockaddr_in mask;
451
452  /*
453   * Bring up the interface.
454   *
455   * Get the old interface flags and or IFF_UP into them; if
456   * IFF_UP set blindly, interface selection can be clobbered.
457   */
458  error = ifioctl(so, SIOCGIFFLAGS, (caddr_t)ireq, procp);
459  if (error)
460    panic("bootpc_fakeup_interface: GIFFLAGS, error=%d", error);
461  ireq->ifr_flags |= IFF_UP;
462  error = ifioctl(so, SIOCSIFFLAGS, (caddr_t)ireq, procp);
463  if (error)
464    panic("bootpc_fakeup_interface: SIFFLAGS, error=%d", error);
465
466  /*
467   * Do enough of ifconfig(8) so that the chosen interface
468   * can talk to the servers.  (just set the address)
469   */
470 
471  /* addr is 0.0.0.0 */
472 
473  sin = (struct sockaddr_in *)&ireq->ifr_addr;
474  bzero((caddr_t)sin, sizeof(*sin));
475  sin->sin_len = sizeof(*sin);
476  sin->sin_family = AF_INET;
477  sin->sin_addr.s_addr = INADDR_ANY;
478  error = ifioctl(so, SIOCSIFADDR, (caddr_t)ireq, procp);
479  if (error)
480    panic("bootpc_fakeup_interface: set if addr, error=%d", error);
481 
482  /* netmask is 0.0.0.0 */
483 
484  sin = (struct sockaddr_in *)&ireq->ifr_addr;
485  bzero((caddr_t)sin, sizeof(*sin));
486  sin->sin_len = sizeof(*sin);
487  sin->sin_family = AF_INET;
488  sin->sin_addr.s_addr = INADDR_ANY;
489  error = ifioctl(so, SIOCSIFNETMASK, (caddr_t)ireq, procp);
490  if (error)
491    panic("bootpc_fakeup_interface: set if net addr, error=%d", error);
492 
493  /* Broadcast is 255.255.255.255 */
494 
495  sin = (struct sockaddr_in *)&ireq->ifr_addr;
496  bzero((caddr_t)sin, sizeof(*sin));
497  sin->sin_len = sizeof(*sin);
498  sin->sin_family = AF_INET;
499  sin->sin_addr.s_addr = INADDR_BROADCAST;
500  error = ifioctl(so, SIOCSIFBRDADDR, (caddr_t)ireq, procp);
501  if (error)
502    panic("bootpc_fakeup_interface: set if broadcast addr, error=%d", error);
503 
504  /* Add default route to 0.0.0.0 so we can send data */
505 
506  bzero((caddr_t) &dst, sizeof(dst));
507  dst.sin_len=sizeof(dst);
508  dst.sin_family=AF_INET;
509  dst.sin_addr.s_addr = htonl(0);
510 
511  bzero((caddr_t) &gw, sizeof(gw));
512  gw.sin_len=sizeof(gw);
513  gw.sin_family=AF_INET;
514  gw.sin_addr.s_addr = htonl(0x0);
515 
516  bzero((caddr_t) &mask, sizeof(mask));
517  mask.sin_len=sizeof(mask);
518  mask.sin_family=AF_INET;
519  mask.sin_addr.s_addr = htonl(0);
520 
521  error = rtrequest(RTM_ADD,
522                    (struct sockaddr *) &dst,
523                    (struct sockaddr *) &gw,
524                    (struct sockaddr *) &mask,
525                    RTF_UP | RTF_STATIC
526                    , NULL);
527  if (error)
528    printf("bootpc_fakeup_interface: add default route, error=%d\n", error);
529  return error;
530}
531
532int
533bootpc_adjust_interface(struct ifreq *ireq,struct socket *so,
534                        struct sockaddr_in *myaddr,
535                        struct sockaddr_in *netmask,
536                        struct sockaddr_in *gw,
537                        struct proc *procp)
538{
539  int error;
540  struct sockaddr_in oldgw;
541  struct sockaddr_in olddst;
542  struct sockaddr_in oldmask;
543  struct sockaddr_in *sin;
544
545  /* Remove old default route to 0.0.0.0 */
546 
547  bzero((caddr_t) &olddst, sizeof(olddst));
548  olddst.sin_len=sizeof(olddst);
549  olddst.sin_family=AF_INET;
550  olddst.sin_addr.s_addr = INADDR_ANY;
551 
552  bzero((caddr_t) &oldgw, sizeof(oldgw));
553  oldgw.sin_len=sizeof(oldgw);
554  oldgw.sin_family=AF_INET;
555  oldgw.sin_addr.s_addr = INADDR_ANY;
556 
557  bzero((caddr_t) &oldmask, sizeof(oldmask));
558  oldmask.sin_len=sizeof(oldmask);
559  oldmask.sin_family=AF_INET;
560  oldmask.sin_addr.s_addr = INADDR_ANY;
561 
562  error = rtrequest(RTM_DELETE,
563                    (struct sockaddr *) &olddst,
564                    (struct sockaddr *) &oldgw,
565                    (struct sockaddr *) &oldmask,
566                    (RTF_UP | RTF_STATIC), NULL);
567  if (error) {
568    printf("nfs_boot: del default route, error=%d\n", error);
569    return error;
570  }
571
572  /*
573   * Do enough of ifconfig(8) so that the chosen interface
574   * can talk to the servers.  (just set the address)
575   */
576  bcopy(netmask,&ireq->ifr_addr,sizeof(*netmask));
577  error = ifioctl(so, SIOCSIFNETMASK, (caddr_t)ireq, procp);
578  if (error)
579    panic("nfs_boot: set if netmask, error=%d", error);
580
581  /* Broadcast is with host part of IP address all 1's */
582 
583  sin = (struct sockaddr_in *)&ireq->ifr_addr;
584  bzero((caddr_t)sin, sizeof(*sin));
585  sin->sin_len = sizeof(*sin);
586  sin->sin_family = AF_INET;
587  sin->sin_addr.s_addr = myaddr->sin_addr.s_addr | ~ netmask->sin_addr.s_addr;
588  error = ifioctl(so, SIOCSIFBRDADDR, (caddr_t)ireq, procp);
589  if (error)
590    panic("bootpc_call: set if broadcast addr, error=%d", error);
591 
592  bcopy(myaddr,&ireq->ifr_addr,sizeof(*myaddr));
593  error = ifioctl(so, SIOCSIFADDR, (caddr_t)ireq, procp);
594  if (error)
595    panic("nfs_boot: set if addr, error=%d", error);
596
597  /* Add new default route */
598
599  error = rtrequest(RTM_ADD,
600                    (struct sockaddr *) &olddst,
601                    (struct sockaddr *) gw,
602                    (struct sockaddr *) &oldmask,
603                    (RTF_UP | RTF_GATEWAY | RTF_STATIC), NULL);
604  if (error) {
605    printf("nfs_boot: add net route, error=%d\n", error);
606    return error;
607  }
608
609  return 0;
610}
611
612#if !defined(__rtems__)
613static int setfs(addr, path, p)
614        struct sockaddr_in *addr;
615        char *path;
616        char *p;
617{
618        unsigned ip = 0;
619        int val;
620
621        if (((val = getdec(&p)) < 0) || (val > 255)) return(0);
622        ip = val << 24;
623        if (*p != '.') return(0);
624        p++;
625        if (((val = getdec(&p)) < 0) || (val > 255)) return(0);
626        ip |= (val << 16);
627        if (*p != '.') return(0);
628        p++;
629        if (((val = getdec(&p)) < 0) || (val > 255)) return(0);
630        ip |= (val << 8);
631        if (*p != '.') return(0);
632        p++;
633        if (((val = getdec(&p)) < 0) || (val > 255)) return(0);
634        ip |= val;
635        if (*p != ':') return(0);
636        p++;
637
638        addr->sin_addr.s_addr = htonl(ip);
639        addr->sin_len = sizeof(struct sockaddr_in);
640        addr->sin_family = AF_INET;
641
642        strncpy(path,p,MNAMELEN-1);
643        return(1);
644}
645#endif
646
647static int getdec(ptr)
648        char **ptr;
649{
650        char *p = *ptr;
651        int ret=0;
652        if ((*p < '0') || (*p > '9')) return(-1);
653        while ((*p >= '0') && (*p <= '9')) {
654                ret = ret*10 + (*p - '0');
655                p++;
656        }
657        *ptr = p;
658        return(ret);
659}
660
661static char *substr(a,b)
662        char *a,*b;
663{
664        char *loc1;
665        char *loc2;
666
667        while (*a != '\0') {
668                loc1 = a;
669                loc2 = b;
670                while (*loc1 == *loc2++) {
671                        if (*loc1 == '\0') return (0);
672                        loc1++;
673                        if (*loc2 == '\0') return (loc1);
674                }
675        a++;
676        }
677        return (0);
678}
679
680static void printip(char *prefix,struct in_addr addr)
681{
682  unsigned int ip;
683
684  ip = ntohl(addr.s_addr);
685
686  printf("%s is %d.%d.%d.%d\n",prefix,
687         ip >> 24, (ip >> 16) & 255 ,(ip >> 8) & 255 ,ip & 255 );
688}
689
690static int dhcpOptionOverload = 0;
691static char dhcp_gotgw = 0;
692static char dhcp_gotnetmask = 0;
693static char dhcp_gotserver = 0;
694static char dhcp_gotlogserver = 0;
695static struct sockaddr_in dhcp_netmask;
696static struct sockaddr_in dhcp_gw;
697static char *dhcp_hostname;
698
699static void
700processOptions (unsigned char *optbuf, int optbufSize)
701{
702  int j = 0;
703  int len;
704  int code, ncode;
705  char *p;
706
707  ncode = optbuf[0];
708  while (j < optbufSize) {
709    code = optbuf[j] = ncode;
710    if (code == 255)
711      return;
712    if (code == 0) {
713      j++;
714      continue;
715    }
716    len = optbuf[j+1];
717    j += 2;
718    if ((len + j) >= optbufSize) {
719      printf ("Truncated field for code %d", code);
720      return;
721    }
722    ncode = optbuf[j+len];
723    optbuf[j+len] = '\0';
724    p = &optbuf[j];
725    j += len;
726
727    /*
728     * Process the option
729     */
730    switch (code) {
731    case 1:
732      /* Subnet mask */
733      if (len!=4)
734        panic("bootpc: subnet mask len is %d",len);
735      bcopy (p, &dhcp_netmask.sin_addr, 4);
736      dhcp_gotnetmask = 1;
737      break;
738
739    case 2:
740      /* Time offset */
741      if (len!=4)
742        panic("bootpc: time offset len is %d",len);
743      bcopy (p, &rtems_bsdnet_timeoffset, 4);
744      rtems_bsdnet_timeoffset = ntohl (rtems_bsdnet_timeoffset);
745      break;
746
747    case 3:
748      /* Routers */
749      if (len % 4)
750        panic ("bootpc: Router Len is %d", len);
751      if (len > 0) {
752        bcopy(p, &dhcp_gw.sin_addr, 4);
753        dhcp_gotgw = 1;
754      }
755      break;
756
757    case 42:
758      /* NTP servers */
759      if (len % 4)
760        panic ("bootpc: time server Len is %d", len);
761      {
762      int tlen = 0;
763      while ((tlen < len) &&
764             (rtems_bsdnet_ntpserver_count < sizeof rtems_bsdnet_config.ntp_server /
765             sizeof rtems_bsdnet_config.ntp_server[0])) {
766        bcopy (p+tlen,
767                &rtems_bsdnet_ntpserver[rtems_bsdnet_ntpserver_count],
768                4);
769        printip("Time Server",
770          rtems_bsdnet_ntpserver[rtems_bsdnet_ntpserver_count]);
771        rtems_bsdnet_ntpserver_count++;
772        tlen += 4;
773      }
774      }
775      break;
776
777    case 6:
778      /* Domain Name servers */
779      if (len % 4)
780        panic ("bootpc: DNS Len is %d", len);
781      {
782      int dlen = 0;
783      while ((dlen < len) &&
784             (rtems_bsdnet_nameserver_count < sizeof rtems_bsdnet_config.name_server /
785        sizeof rtems_bsdnet_config.name_server[0])) {
786        bcopy (p+dlen,
787        &rtems_bsdnet_nameserver[rtems_bsdnet_nameserver_count],
788        4);
789        printip("Domain Name Server",
790          rtems_bsdnet_nameserver[rtems_bsdnet_nameserver_count]);
791        rtems_bsdnet_nameserver_count++;
792        dlen += 4;
793      }
794      }
795      break;
796
797    case 12:
798      /* Host name */
799      if (len>=MAXHOSTNAMELEN)
800        panic ("bootpc: hostname >=%d bytes", MAXHOSTNAMELEN);
801      if (sethostname (p, len) < 0)
802        panic("Can't set host name");
803      printf("Hostname is %s\n", p);
804      dhcp_hostname = strdup(p);
805      break;
806
807    case 7:
808      /* Log servers */
809      if (len % 4)
810        panic ("bootpc: Log server Len is %d", len);
811      if (len > 0) {
812        bcopy(p, &rtems_bsdnet_log_host_address, 4);
813        dhcp_gotlogserver = 1;
814      }
815      break;
816
817    case 15:
818      /* Domain name */
819      if (p[0]) {
820        rtems_bsdnet_domain_name = strdup (p);
821        printf("Domain name is %s\n", rtems_bsdnet_domain_name);
822      }
823      break;
824
825    case 16:  /* Swap server IP address. unused */
826      break;
827
828    case 52:
829      /* DHCP option override */
830      if (len != 1)
831        panic ("bootpc: DHCP option overload len is %d", len);
832      dhcpOptionOverload = p[0];
833      break;
834
835    case 128: /* Site-specific option for DHCP servers that
836               *   a) don't supply tag 54
837               * and
838               *   b) don't supply the server address in siaddr
839               * For example, on Solaris 2.6 in.dhcpd, include in the dhcptab:
840               *    Bootsrv s Site,128,IP,1,1
841               * and use that symbol in the macro that defines the client:
842               *    Bootsrv=<tftp-server-ip-address>
843               */
844    case 54:
845      /* DHCP server */
846      if (len != 4)
847        panic ("bootpc: DHCP server len is %d", len);
848      bcopy(p, &rtems_bsdnet_bootp_server_address, 4);
849      dhcp_gotserver = 1;
850      break;
851
852    case 66:
853      /* DHCP server name option */
854      if (p[0])
855        rtems_bsdnet_bootp_server_name = strdup (p);
856      break;
857
858    case 67:
859      /* DHCP bootfile option */
860      if (p[0])
861        rtems_bsdnet_bootp_boot_file_name = strdup (p);
862      break;
863
864    default:
865      printf ("Ignoring BOOTP/DHCP option code %d\n", code);
866      break;
867    }
868  }
869}
870
871#define EALEN 6
872
873void
874bootpc_init(int update_files)
875{
876  struct bootp_packet call;
877  struct bootp_packet reply;
878  static u_int32_t xid = ~0xFF;
879 
880  struct ifreq ireq;
881  struct ifnet *ifp;
882  struct socket *so;
883  int j;
884  int error;
885  struct sockaddr_in myaddr;
886  struct ifaddr *ifa;
887  struct sockaddr_dl *sdl = NULL;
888  char *delim;
889  struct proc *procp = NULL;
890
891  /*
892   * If already filled in, don't touch it here
893   */
894  if (nfs_diskless_valid)
895    return;
896
897  /*
898   * If we are to update the files create the root
899   * file structure.
900   */
901  if (update_files)
902    if (rtems_create_root_fs () < 0) {
903      printf("Error creating the root filesystem.\nFile not created.\n");
904      update_files = 0;
905    }
906
907  memset(dhcp_hostname, 0, sizeof(dhcp_hostname));
908 
909  /*
910   * Find a network interface.
911   */
912  for (ifp = ifnet; ifp != 0; ifp = ifp->if_next)
913    if ((ifp->if_flags &
914      (IFF_LOOPBACK|IFF_POINTOPOINT)) == 0)
915        break;
916  if (ifp == NULL)
917    panic("bootpc_init: no suitable interface");
918  bzero(&ireq,sizeof(ireq));
919  sprintf(ireq.ifr_name, "%s%d", ifp->if_name,ifp->if_unit);
920  printf("bootpc_init: using network interface '%s'\n",
921         ireq.ifr_name);
922
923  if ((error = socreate(AF_INET, &so, SOCK_DGRAM, 0,procp)) != 0)
924    panic("nfs_boot: socreate, error=%d", error);
925         
926  bootpc_fakeup_interface(&ireq,so,procp);
927
928  printf("Bootpc testing starting\n");
929 
930  /* Get HW address */
931
932  for (ifa = ifp->if_addrlist;ifa; ifa = ifa->ifa_next)
933    if (ifa->ifa_addr->sa_family == AF_LINK &&
934        (sdl = ((struct sockaddr_dl *) ifa->ifa_addr)) &&
935        sdl->sdl_type == IFT_ETHER)
936      break;
937 
938  if (!sdl)
939    panic("bootpc: Unable to find HW address");
940  if (sdl->sdl_alen != EALEN )
941    panic("bootpc: HW address len is %d, expected value is %d",
942          sdl->sdl_alen,EALEN);
943
944  printf("bootpc hw address is ");
945  delim="";
946  for (j=0;j<sdl->sdl_alen;j++) {
947    printf("%s%x",delim,((unsigned char *)LLADDR(sdl))[j]);
948    delim=":";
949  }
950  printf("\n");
951
952#if 0
953  bootpboot_p_iflist();
954  bootpboot_p_rtlist();
955#endif
956 
957  bzero((caddr_t) &call, sizeof(call));
958
959  /* bootpc part */
960  call.op = 1;                  /* BOOTREQUEST */
961  call.htype= 1;                /* 10mb ethernet */
962  call.hlen=sdl->sdl_alen;      /* Hardware address length */
963  call.hops=0; 
964  xid++;
965  call.xid = txdr_unsigned(xid);
966  bcopy(LLADDR(sdl),&call.chaddr,sdl->sdl_alen);
967 
968  call.vend[0]=99;
969  call.vend[1]=130;
970  call.vend[2]=83;
971  call.vend[3]=99;
972  call.vend[4]=255;
973 
974  call.secs = 0;
975  call.flags = htons(0x8000); /* We need an broadcast answer */
976 
977  error = bootpc_call(&call,&reply,procp);
978 
979  if (error)
980    panic("BOOTP call failed -- error %d", error);
981 
982  /*
983   * Initialize network address structures
984   */
985  bzero(&myaddr,sizeof(myaddr));
986  bzero(&dhcp_netmask,sizeof(dhcp_netmask));
987  bzero(&dhcp_gw,sizeof(dhcp_gw));
988  myaddr.sin_len = sizeof(myaddr);
989  myaddr.sin_family = AF_INET;
990  dhcp_netmask.sin_len = sizeof(dhcp_netmask);
991  dhcp_netmask.sin_family = AF_INET;
992  dhcp_gw.sin_len = sizeof(dhcp_gw);
993  dhcp_gw.sin_family= AF_INET;
994
995  /*
996   * Set our address
997   */
998  myaddr.sin_addr = reply.yiaddr;
999  printip("My ip address",myaddr.sin_addr);
1000
1001  /*
1002   * Process BOOTP/DHCP options
1003   */
1004  if (reply.vend[0]==99 && reply.vend[1]==130 &&
1005      reply.vend[2]==83 && reply.vend[3]==99) {
1006    processOptions (&reply.vend[4], sizeof(reply.vend) - 4);
1007  }
1008  if (dhcpOptionOverload & 1) {
1009    processOptions (reply.file, sizeof reply.file);
1010  }
1011  else {
1012    if (reply.file[0])
1013      rtems_bsdnet_bootp_boot_file_name = strdup (reply.file);
1014  }
1015  if (dhcpOptionOverload & 2) {
1016    processOptions (reply.sname, sizeof reply.sname);
1017  }
1018  else {
1019    if (reply.sname[0])
1020      rtems_bsdnet_bootp_server_name = strdup (reply.sname);
1021  }
1022  if (rtems_bsdnet_bootp_server_name)
1023    printf ("Server name is %s\n", rtems_bsdnet_bootp_server_name);
1024  if (rtems_bsdnet_bootp_boot_file_name)
1025    printf ("Boot file is %s\n", rtems_bsdnet_bootp_boot_file_name);
1026
1027  /*
1028   * Use defaults if values were not supplied by BOOTP/DHCP options
1029   */
1030  if (!dhcp_gotnetmask) {
1031    if (IN_CLASSA(ntohl(myaddr.sin_addr.s_addr)))
1032      dhcp_netmask.sin_addr.s_addr = htonl(IN_CLASSA_NET);
1033    else if (IN_CLASSB(ntohl(myaddr.sin_addr.s_addr)))
1034      dhcp_netmask.sin_addr.s_addr = htonl(IN_CLASSB_NET);
1035    else
1036      dhcp_netmask.sin_addr.s_addr = htonl(IN_CLASSC_NET);
1037  }
1038  printip ("Subnet mask", dhcp_netmask.sin_addr);
1039  if (!dhcp_gotserver)
1040   rtems_bsdnet_bootp_server_address = reply.siaddr;
1041  printip ("Server ip address" ,rtems_bsdnet_bootp_server_address);
1042  if (!dhcp_gotgw)
1043    dhcp_gw.sin_addr = reply.giaddr;
1044  printip ("Gateway ip address", dhcp_gw.sin_addr);
1045  if (!dhcp_gotlogserver)
1046    rtems_bsdnet_log_host_address = rtems_bsdnet_bootp_server_address;
1047  printip ("Log server ip address", rtems_bsdnet_log_host_address);
1048
1049  /*
1050   * Update the files if we are asked too.
1051   */
1052  if (update_files) {
1053    char *dn = rtems_bsdnet_domain_name;
1054    char *hn = dhcp_hostname;
1055    if (!dn)
1056      dn = "mydomain";
1057    if (!hn)
1058      hn = "me";
1059    rtems_rootfs_append_host_rec(*((unsigned long*) &myaddr.sin_addr), hn, dn);
1060
1061    /*
1062     * Should the given domainname be used here ?
1063     */
1064    if (dhcp_gotserver) {
1065      if (rtems_bsdnet_bootp_server_name)
1066        hn = rtems_bsdnet_bootp_server_name;
1067      else
1068        hn = "bootps";
1069      rtems_rootfs_append_host_rec(*((unsigned long *) &rtems_bsdnet_bootp_server_address),
1070                                   hn, dn);
1071    }
1072
1073    if (dhcp_gotlogserver) {
1074      rtems_rootfs_append_host_rec(*((unsigned long *) &rtems_bsdnet_log_host_address),
1075                                   "logs", dn);
1076    }
1077
1078    /*
1079     * Setup the DNS configuration file /etc/resolv.conf.
1080     */
1081    if (rtems_bsdnet_nameserver_count) {
1082      int        i;
1083      char       buf[64];
1084      const char *bufl[1];
1085
1086      bufl[0] = buf;
1087     
1088#define MKFILE_MODE (S_IRUSR | S_IWUSR | S_IWGRP | S_IRGRP | S_IROTH)
1089     
1090      if (rtems_bsdnet_domain_name &&
1091          (strlen(rtems_bsdnet_domain_name) < (sizeof(buf) - 1))) {
1092        strcpy(buf, "search ");
1093        strcat(buf, rtems_bsdnet_domain_name);
1094        strcat(buf, "\n");
1095        rtems_rootfs_file_append ("/etc/resolv.conf", MKFILE_MODE, 1, bufl);
1096      }
1097
1098      for (i = 0; i < rtems_bsdnet_nameserver_count; i++) {
1099        strcpy(buf, "nameserver ");
1100        strcat(buf, inet_ntoa(rtems_bsdnet_ntpserver[i]));
1101        strcat(buf, "\n");
1102        if (rtems_rootfs_file_append ("/etc/resolv.conf", MKFILE_MODE, 1, bufl))
1103          break;
1104      }
1105    }
1106  }
1107
1108  /*
1109   * Configure the interface with the new settings
1110   */
1111  error = bootpc_adjust_interface(&ireq,so,
1112                                  &myaddr,&dhcp_netmask,&dhcp_gw,procp);
1113  soclose(so);
1114}
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