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-rw-r--r--net/ipv6/addrconf.c346
1 files changed, 193 insertions, 153 deletions
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 19727d941962..01c62a0d3742 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -78,8 +78,6 @@
78 78
79#ifdef CONFIG_IPV6_PRIVACY 79#ifdef CONFIG_IPV6_PRIVACY
80#include <linux/random.h> 80#include <linux/random.h>
81#include <linux/crypto.h>
82#include <linux/scatterlist.h>
83#endif 81#endif
84 82
85#include <asm/uaccess.h> 83#include <asm/uaccess.h>
@@ -110,8 +108,6 @@ static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpad
110static void ipv6_regen_rndid(unsigned long data); 108static void ipv6_regen_rndid(unsigned long data);
111 109
112static int desync_factor = MAX_DESYNC_FACTOR * HZ; 110static int desync_factor = MAX_DESYNC_FACTOR * HZ;
113static struct crypto_tfm *md5_tfm;
114static DEFINE_SPINLOCK(md5_tfm_lock);
115#endif 111#endif
116 112
117static int ipv6_count_addresses(struct inet6_dev *idev); 113static int ipv6_count_addresses(struct inet6_dev *idev);
@@ -169,6 +165,15 @@ struct ipv6_devconf ipv6_devconf = {
169 .max_desync_factor = MAX_DESYNC_FACTOR, 165 .max_desync_factor = MAX_DESYNC_FACTOR,
170#endif 166#endif
171 .max_addresses = IPV6_MAX_ADDRESSES, 167 .max_addresses = IPV6_MAX_ADDRESSES,
168 .accept_ra_defrtr = 1,
169 .accept_ra_pinfo = 1,
170#ifdef CONFIG_IPV6_ROUTER_PREF
171 .accept_ra_rtr_pref = 1,
172 .rtr_probe_interval = 60 * HZ,
173#ifdef CONFIG_IPV6_ROUTE_INFO
174 .accept_ra_rt_info_max_plen = 0,
175#endif
176#endif
172}; 177};
173 178
174static struct ipv6_devconf ipv6_devconf_dflt = { 179static struct ipv6_devconf ipv6_devconf_dflt = {
@@ -190,6 +195,15 @@ static struct ipv6_devconf ipv6_devconf_dflt = {
190 .max_desync_factor = MAX_DESYNC_FACTOR, 195 .max_desync_factor = MAX_DESYNC_FACTOR,
191#endif 196#endif
192 .max_addresses = IPV6_MAX_ADDRESSES, 197 .max_addresses = IPV6_MAX_ADDRESSES,
198 .accept_ra_defrtr = 1,
199 .accept_ra_pinfo = 1,
200#ifdef CONFIG_IPV6_ROUTER_PREF
201 .accept_ra_rtr_pref = 1,
202 .rtr_probe_interval = 60 * HZ,
203#ifdef CONFIG_IPV6_ROUTE_INFO
204 .accept_ra_rt_info_max_plen = 0,
205#endif
206#endif
193}; 207};
194 208
195/* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */ 209/* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
@@ -327,86 +341,83 @@ static struct inet6_dev * ipv6_add_dev(struct net_device *dev)
327 if (dev->mtu < IPV6_MIN_MTU) 341 if (dev->mtu < IPV6_MIN_MTU)
328 return NULL; 342 return NULL;
329 343
330 ndev = kmalloc(sizeof(struct inet6_dev), GFP_KERNEL); 344 ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL);
331 345
332 if (ndev) { 346 if (ndev == NULL)
333 memset(ndev, 0, sizeof(struct inet6_dev)); 347 return NULL;
334 348
335 rwlock_init(&ndev->lock); 349 rwlock_init(&ndev->lock);
336 ndev->dev = dev; 350 ndev->dev = dev;
337 memcpy(&ndev->cnf, &ipv6_devconf_dflt, sizeof(ndev->cnf)); 351 memcpy(&ndev->cnf, &ipv6_devconf_dflt, sizeof(ndev->cnf));
338 ndev->cnf.mtu6 = dev->mtu; 352 ndev->cnf.mtu6 = dev->mtu;
339 ndev->cnf.sysctl = NULL; 353 ndev->cnf.sysctl = NULL;
340 ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl); 354 ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl);
341 if (ndev->nd_parms == NULL) { 355 if (ndev->nd_parms == NULL) {
342 kfree(ndev); 356 kfree(ndev);
343 return NULL; 357 return NULL;
344 } 358 }
345 /* We refer to the device */ 359 /* We refer to the device */
346 dev_hold(dev); 360 dev_hold(dev);
347
348 if (snmp6_alloc_dev(ndev) < 0) {
349 ADBG((KERN_WARNING
350 "%s(): cannot allocate memory for statistics; dev=%s.\n",
351 __FUNCTION__, dev->name));
352 neigh_parms_release(&nd_tbl, ndev->nd_parms);
353 ndev->dead = 1;
354 in6_dev_finish_destroy(ndev);
355 return NULL;
356 }
357 361
358 if (snmp6_register_dev(ndev) < 0) { 362 if (snmp6_alloc_dev(ndev) < 0) {
359 ADBG((KERN_WARNING 363 ADBG((KERN_WARNING
360 "%s(): cannot create /proc/net/dev_snmp6/%s\n", 364 "%s(): cannot allocate memory for statistics; dev=%s.\n",
361 __FUNCTION__, dev->name)); 365 __FUNCTION__, dev->name));
362 neigh_parms_release(&nd_tbl, ndev->nd_parms); 366 neigh_parms_release(&nd_tbl, ndev->nd_parms);
363 ndev->dead = 1; 367 ndev->dead = 1;
364 in6_dev_finish_destroy(ndev); 368 in6_dev_finish_destroy(ndev);
365 return NULL; 369 return NULL;
366 } 370 }
367 371
368 /* One reference from device. We must do this before 372 if (snmp6_register_dev(ndev) < 0) {
369 * we invoke __ipv6_regen_rndid(). 373 ADBG((KERN_WARNING
370 */ 374 "%s(): cannot create /proc/net/dev_snmp6/%s\n",
371 in6_dev_hold(ndev); 375 __FUNCTION__, dev->name));
376 neigh_parms_release(&nd_tbl, ndev->nd_parms);
377 ndev->dead = 1;
378 in6_dev_finish_destroy(ndev);
379 return NULL;
380 }
381
382 /* One reference from device. We must do this before
383 * we invoke __ipv6_regen_rndid().
384 */
385 in6_dev_hold(ndev);
372 386
373#ifdef CONFIG_IPV6_PRIVACY 387#ifdef CONFIG_IPV6_PRIVACY
374 get_random_bytes(ndev->rndid, sizeof(ndev->rndid)); 388 init_timer(&ndev->regen_timer);
375 get_random_bytes(ndev->entropy, sizeof(ndev->entropy)); 389 ndev->regen_timer.function = ipv6_regen_rndid;
376 init_timer(&ndev->regen_timer); 390 ndev->regen_timer.data = (unsigned long) ndev;
377 ndev->regen_timer.function = ipv6_regen_rndid; 391 if ((dev->flags&IFF_LOOPBACK) ||
378 ndev->regen_timer.data = (unsigned long) ndev; 392 dev->type == ARPHRD_TUNNEL ||
379 if ((dev->flags&IFF_LOOPBACK) || 393 dev->type == ARPHRD_NONE ||
380 dev->type == ARPHRD_TUNNEL || 394 dev->type == ARPHRD_SIT) {
381 dev->type == ARPHRD_NONE || 395 printk(KERN_INFO
382 dev->type == ARPHRD_SIT) { 396 "%s: Disabled Privacy Extensions\n",
383 printk(KERN_INFO 397 dev->name);
384 "%s: Disabled Privacy Extensions\n", 398 ndev->cnf.use_tempaddr = -1;
385 dev->name); 399 } else {
386 ndev->cnf.use_tempaddr = -1; 400 in6_dev_hold(ndev);
387 } else { 401 ipv6_regen_rndid((unsigned long) ndev);
388 in6_dev_hold(ndev); 402 }
389 ipv6_regen_rndid((unsigned long) ndev);
390 }
391#endif 403#endif
392 404
393 if (netif_carrier_ok(dev)) 405 if (netif_carrier_ok(dev))
394 ndev->if_flags |= IF_READY; 406 ndev->if_flags |= IF_READY;
395 407
396 write_lock_bh(&addrconf_lock); 408 write_lock_bh(&addrconf_lock);
397 dev->ip6_ptr = ndev; 409 dev->ip6_ptr = ndev;
398 write_unlock_bh(&addrconf_lock); 410 write_unlock_bh(&addrconf_lock);
399 411
400 ipv6_mc_init_dev(ndev); 412 ipv6_mc_init_dev(ndev);
401 ndev->tstamp = jiffies; 413 ndev->tstamp = jiffies;
402#ifdef CONFIG_SYSCTL 414#ifdef CONFIG_SYSCTL
403 neigh_sysctl_register(dev, ndev->nd_parms, NET_IPV6, 415 neigh_sysctl_register(dev, ndev->nd_parms, NET_IPV6,
404 NET_IPV6_NEIGH, "ipv6", 416 NET_IPV6_NEIGH, "ipv6",
405 &ndisc_ifinfo_sysctl_change, 417 &ndisc_ifinfo_sysctl_change,
406 NULL); 418 NULL);
407 addrconf_sysctl_register(ndev, &ndev->cnf); 419 addrconf_sysctl_register(ndev, &ndev->cnf);
408#endif 420#endif
409 }
410 return ndev; 421 return ndev;
411} 422}
412 423
@@ -524,7 +535,7 @@ ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
524 goto out; 535 goto out;
525 } 536 }
526 537
527 ifa = kmalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC); 538 ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC);
528 539
529 if (ifa == NULL) { 540 if (ifa == NULL) {
530 ADBG(("ipv6_add_addr: malloc failed\n")); 541 ADBG(("ipv6_add_addr: malloc failed\n"));
@@ -538,7 +549,6 @@ ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
538 goto out; 549 goto out;
539 } 550 }
540 551
541 memset(ifa, 0, sizeof(struct inet6_ifaddr));
542 ipv6_addr_copy(&ifa->addr, addr); 552 ipv6_addr_copy(&ifa->addr, addr);
543 553
544 spin_lock_init(&ifa->lock); 554 spin_lock_init(&ifa->lock);
@@ -1305,52 +1315,67 @@ static void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
1305 __ipv6_dev_ac_dec(ifp->idev, &addr); 1315 __ipv6_dev_ac_dec(ifp->idev, &addr);
1306} 1316}
1307 1317
1318static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
1319{
1320 if (dev->addr_len != ETH_ALEN)
1321 return -1;
1322 memcpy(eui, dev->dev_addr, 3);
1323 memcpy(eui + 5, dev->dev_addr + 3, 3);
1324
1325 /*
1326 * The zSeries OSA network cards can be shared among various
1327 * OS instances, but the OSA cards have only one MAC address.
1328 * This leads to duplicate address conflicts in conjunction
1329 * with IPv6 if more than one instance uses the same card.
1330 *
1331 * The driver for these cards can deliver a unique 16-bit
1332 * identifier for each instance sharing the same card. It is
1333 * placed instead of 0xFFFE in the interface identifier. The
1334 * "u" bit of the interface identifier is not inverted in this
1335 * case. Hence the resulting interface identifier has local
1336 * scope according to RFC2373.
1337 */
1338 if (dev->dev_id) {
1339 eui[3] = (dev->dev_id >> 8) & 0xFF;
1340 eui[4] = dev->dev_id & 0xFF;
1341 } else {
1342 eui[3] = 0xFF;
1343 eui[4] = 0xFE;
1344 eui[0] ^= 2;
1345 }
1346 return 0;
1347}
1348
1349static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev)
1350{
1351 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1352 if (dev->addr_len != ARCNET_ALEN)
1353 return -1;
1354 memset(eui, 0, 7);
1355 eui[7] = *(u8*)dev->dev_addr;
1356 return 0;
1357}
1358
1359static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev)
1360{
1361 if (dev->addr_len != INFINIBAND_ALEN)
1362 return -1;
1363 memcpy(eui, dev->dev_addr + 12, 8);
1364 eui[0] |= 2;
1365 return 0;
1366}
1367
1308static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) 1368static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
1309{ 1369{
1310 switch (dev->type) { 1370 switch (dev->type) {
1311 case ARPHRD_ETHER: 1371 case ARPHRD_ETHER:
1312 case ARPHRD_FDDI: 1372 case ARPHRD_FDDI:
1313 case ARPHRD_IEEE802_TR: 1373 case ARPHRD_IEEE802_TR:
1314 if (dev->addr_len != ETH_ALEN) 1374 return addrconf_ifid_eui48(eui, dev);
1315 return -1;
1316 memcpy(eui, dev->dev_addr, 3);
1317 memcpy(eui + 5, dev->dev_addr + 3, 3);
1318
1319 /*
1320 * The zSeries OSA network cards can be shared among various
1321 * OS instances, but the OSA cards have only one MAC address.
1322 * This leads to duplicate address conflicts in conjunction
1323 * with IPv6 if more than one instance uses the same card.
1324 *
1325 * The driver for these cards can deliver a unique 16-bit
1326 * identifier for each instance sharing the same card. It is
1327 * placed instead of 0xFFFE in the interface identifier. The
1328 * "u" bit of the interface identifier is not inverted in this
1329 * case. Hence the resulting interface identifier has local
1330 * scope according to RFC2373.
1331 */
1332 if (dev->dev_id) {
1333 eui[3] = (dev->dev_id >> 8) & 0xFF;
1334 eui[4] = dev->dev_id & 0xFF;
1335 } else {
1336 eui[3] = 0xFF;
1337 eui[4] = 0xFE;
1338 eui[0] ^= 2;
1339 }
1340 return 0;
1341 case ARPHRD_ARCNET: 1375 case ARPHRD_ARCNET:
1342 /* XXX: inherit EUI-64 from other interface -- yoshfuji */ 1376 return addrconf_ifid_arcnet(eui, dev);
1343 if (dev->addr_len != ARCNET_ALEN)
1344 return -1;
1345 memset(eui, 0, 7);
1346 eui[7] = *(u8*)dev->dev_addr;
1347 return 0;
1348 case ARPHRD_INFINIBAND: 1377 case ARPHRD_INFINIBAND:
1349 if (dev->addr_len != INFINIBAND_ALEN) 1378 return addrconf_ifid_infiniband(eui, dev);
1350 return -1;
1351 memcpy(eui, dev->dev_addr + 12, 8);
1352 eui[0] |= 2;
1353 return 0;
1354 } 1379 }
1355 return -1; 1380 return -1;
1356} 1381}
@@ -1376,34 +1401,9 @@ static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
1376/* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */ 1401/* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1377static int __ipv6_regen_rndid(struct inet6_dev *idev) 1402static int __ipv6_regen_rndid(struct inet6_dev *idev)
1378{ 1403{
1379 struct net_device *dev;
1380 struct scatterlist sg[2];
1381
1382 sg_set_buf(&sg[0], idev->entropy, 8);
1383 sg_set_buf(&sg[1], idev->work_eui64, 8);
1384
1385 dev = idev->dev;
1386
1387 if (ipv6_generate_eui64(idev->work_eui64, dev)) {
1388 printk(KERN_INFO
1389 "__ipv6_regen_rndid(idev=%p): cannot get EUI64 identifier; use random bytes.\n",
1390 idev);
1391 get_random_bytes(idev->work_eui64, sizeof(idev->work_eui64));
1392 }
1393regen: 1404regen:
1394 spin_lock(&md5_tfm_lock); 1405 get_random_bytes(idev->rndid, sizeof(idev->rndid));
1395 if (unlikely(md5_tfm == NULL)) {
1396 spin_unlock(&md5_tfm_lock);
1397 return -1;
1398 }
1399 crypto_digest_init(md5_tfm);
1400 crypto_digest_update(md5_tfm, sg, 2);
1401 crypto_digest_final(md5_tfm, idev->work_digest);
1402 spin_unlock(&md5_tfm_lock);
1403
1404 memcpy(idev->rndid, &idev->work_digest[0], 8);
1405 idev->rndid[0] &= ~0x02; 1406 idev->rndid[0] &= ~0x02;
1406 memcpy(idev->entropy, &idev->work_digest[8], 8);
1407 1407
1408 /* 1408 /*
1409 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>: 1409 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
@@ -2143,7 +2143,6 @@ static void addrconf_ip6_tnl_config(struct net_device *dev)
2143 return; 2143 return;
2144 } 2144 }
2145 ip6_tnl_add_linklocal(idev); 2145 ip6_tnl_add_linklocal(idev);
2146 addrconf_add_mroute(dev);
2147} 2146}
2148 2147
2149static int addrconf_notify(struct notifier_block *this, unsigned long event, 2148static int addrconf_notify(struct notifier_block *this, unsigned long event,
@@ -2668,11 +2667,10 @@ static int if6_seq_open(struct inode *inode, struct file *file)
2668{ 2667{
2669 struct seq_file *seq; 2668 struct seq_file *seq;
2670 int rc = -ENOMEM; 2669 int rc = -ENOMEM;
2671 struct if6_iter_state *s = kmalloc(sizeof(*s), GFP_KERNEL); 2670 struct if6_iter_state *s = kzalloc(sizeof(*s), GFP_KERNEL);
2672 2671
2673 if (!s) 2672 if (!s)
2674 goto out; 2673 goto out;
2675 memset(s, 0, sizeof(*s));
2676 2674
2677 rc = seq_open(file, &if6_seq_ops); 2675 rc = seq_open(file, &if6_seq_ops);
2678 if (rc) 2676 if (rc)
@@ -3133,6 +3131,15 @@ static void inline ipv6_store_devconf(struct ipv6_devconf *cnf,
3133 array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor; 3131 array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor;
3134#endif 3132#endif
3135 array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses; 3133 array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses;
3134 array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr;
3135 array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo;
3136#ifdef CONFIG_IPV6_ROUTER_PREF
3137 array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref;
3138 array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval;
3139#ifdef CONFIV_IPV6_ROUTE_INFO
3140 array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen;
3141#endif
3142#endif
3136} 3143}
3137 3144
3138static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, 3145static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
@@ -3586,6 +3593,51 @@ static struct addrconf_sysctl_table
3586 .proc_handler = &proc_dointvec, 3593 .proc_handler = &proc_dointvec,
3587 }, 3594 },
3588 { 3595 {
3596 .ctl_name = NET_IPV6_ACCEPT_RA_DEFRTR,
3597 .procname = "accept_ra_defrtr",
3598 .data = &ipv6_devconf.accept_ra_defrtr,
3599 .maxlen = sizeof(int),
3600 .mode = 0644,
3601 .proc_handler = &proc_dointvec,
3602 },
3603 {
3604 .ctl_name = NET_IPV6_ACCEPT_RA_PINFO,
3605 .procname = "accept_ra_pinfo",
3606 .data = &ipv6_devconf.accept_ra_pinfo,
3607 .maxlen = sizeof(int),
3608 .mode = 0644,
3609 .proc_handler = &proc_dointvec,
3610 },
3611#ifdef CONFIG_IPV6_ROUTER_PREF
3612 {
3613 .ctl_name = NET_IPV6_ACCEPT_RA_RTR_PREF,
3614 .procname = "accept_ra_rtr_pref",
3615 .data = &ipv6_devconf.accept_ra_rtr_pref,
3616 .maxlen = sizeof(int),
3617 .mode = 0644,
3618 .proc_handler = &proc_dointvec,
3619 },
3620 {
3621 .ctl_name = NET_IPV6_RTR_PROBE_INTERVAL,
3622 .procname = "router_probe_interval",
3623 .data = &ipv6_devconf.rtr_probe_interval,
3624 .maxlen = sizeof(int),
3625 .mode = 0644,
3626 .proc_handler = &proc_dointvec_jiffies,
3627 .strategy = &sysctl_jiffies,
3628 },
3629#ifdef CONFIV_IPV6_ROUTE_INFO
3630 {
3631 .ctl_name = NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN,
3632 .procname = "accept_ra_rt_info_max_plen",
3633 .data = &ipv6_devconf.accept_ra_rt_info_max_plen,
3634 .maxlen = sizeof(int),
3635 .mode = 0644,
3636 .proc_handler = &proc_dointvec,
3637 },
3638#endif
3639#endif
3640 {
3589 .ctl_name = 0, /* sentinel */ 3641 .ctl_name = 0, /* sentinel */
3590 } 3642 }
3591 }, 3643 },
@@ -3760,13 +3812,6 @@ int __init addrconf_init(void)
3760 3812
3761 register_netdevice_notifier(&ipv6_dev_notf); 3813 register_netdevice_notifier(&ipv6_dev_notf);
3762 3814
3763#ifdef CONFIG_IPV6_PRIVACY
3764 md5_tfm = crypto_alloc_tfm("md5", 0);
3765 if (unlikely(md5_tfm == NULL))
3766 printk(KERN_WARNING
3767 "failed to load transform for md5\n");
3768#endif
3769
3770 addrconf_verify(0); 3815 addrconf_verify(0);
3771 rtnetlink_links[PF_INET6] = inet6_rtnetlink_table; 3816 rtnetlink_links[PF_INET6] = inet6_rtnetlink_table;
3772#ifdef CONFIG_SYSCTL 3817#ifdef CONFIG_SYSCTL
@@ -3829,11 +3874,6 @@ void __exit addrconf_cleanup(void)
3829 3874
3830 rtnl_unlock(); 3875 rtnl_unlock();
3831 3876
3832#ifdef CONFIG_IPV6_PRIVACY
3833 crypto_free_tfm(md5_tfm);
3834 md5_tfm = NULL;
3835#endif
3836
3837#ifdef CONFIG_PROC_FS 3877#ifdef CONFIG_PROC_FS
3838 proc_net_remove("if_inet6"); 3878 proc_net_remove("if_inet6");
3839#endif 3879#endif
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-02 09:36:53 -0500