cregit-Linux how code gets into the kernel

Release 4.11 net/ipv6/ndisc.c

Directory: net/ipv6
/*
 *      Neighbour Discovery for IPv6
 *      Linux INET6 implementation
 *
 *      Authors:
 *      Pedro Roque             <roque@di.fc.ul.pt>
 *      Mike Shaver             <shaver@ingenia.com>
 *
 *      This program is free software; you can redistribute it and/or
 *      modify it under the terms of the GNU General Public License
 *      as published by the Free Software Foundation; either version
 *      2 of the License, or (at your option) any later version.
 */

/*
 *      Changes:
 *
 *      Alexey I. Froloff               :       RFC6106 (DNSSL) support
 *      Pierre Ynard                    :       export userland ND options
 *                                              through netlink (RDNSS support)
 *      Lars Fenneberg                  :       fixed MTU setting on receipt
 *                                              of an RA.
 *      Janos Farkas                    :       kmalloc failure checks
 *      Alexey Kuznetsov                :       state machine reworked
 *                                              and moved to net/core.
 *      Pekka Savola                    :       RFC2461 validation
 *      YOSHIFUJI Hideaki @USAGI        :       Verify ND options properly
 */


#define pr_fmt(fmt) "ICMPv6: " fmt

#include <linux/module.h>
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/sockios.h>
#include <linux/sched.h>
#include <linux/net.h>
#include <linux/in6.h>
#include <linux/route.h>
#include <linux/init.h>
#include <linux/rcupdate.h>
#include <linux/slab.h>
#ifdef CONFIG_SYSCTL
#include <linux/sysctl.h>
#endif

#include <linux/if_addr.h>
#include <linux/if_arp.h>
#include <linux/ipv6.h>
#include <linux/icmpv6.h>
#include <linux/jhash.h>

#include <net/sock.h>
#include <net/snmp.h>

#include <net/ipv6.h>
#include <net/protocol.h>
#include <net/ndisc.h>
#include <net/ip6_route.h>
#include <net/addrconf.h>
#include <net/icmp.h>

#include <net/netlink.h>
#include <linux/rtnetlink.h>

#include <net/flow.h>
#include <net/ip6_checksum.h>
#include <net/inet_common.h>
#include <linux/proc_fs.h>

#include <linux/netfilter.h>
#include <linux/netfilter_ipv6.h>

static u32 ndisc_hash(const void *pkey,
		      const struct net_device *dev,
		      __u32 *hash_rnd);
static bool ndisc_key_eq(const struct neighbour *neigh, const void *pkey);
static int ndisc_constructor(struct neighbour *neigh);
static void ndisc_solicit(struct neighbour *neigh, struct sk_buff *skb);
static void ndisc_error_report(struct neighbour *neigh, struct sk_buff *skb);
static int pndisc_constructor(struct pneigh_entry *n);
static void pndisc_destructor(struct pneigh_entry *n);
static void pndisc_redo(struct sk_buff *skb);


static const struct neigh_ops ndisc_generic_ops = {
	.family =		AF_INET6,
	.solicit =		ndisc_solicit,
	.error_report =		ndisc_error_report,
	.output =		neigh_resolve_output,
	.connected_output =	neigh_connected_output,
};


static const struct neigh_ops ndisc_hh_ops = {
	.family =		AF_INET6,
	.solicit =		ndisc_solicit,
	.error_report =		ndisc_error_report,
	.output =		neigh_resolve_output,
	.connected_output =	neigh_resolve_output,
};



static const struct neigh_ops ndisc_direct_ops = {
	.family =		AF_INET6,
	.output =		neigh_direct_output,
	.connected_output =	neigh_direct_output,
};


struct neigh_table nd_tbl = {
	.family =	AF_INET6,
	.key_len =	sizeof(struct in6_addr),
	.protocol =	cpu_to_be16(ETH_P_IPV6),
	.hash =		ndisc_hash,
	.key_eq =	ndisc_key_eq,
	.constructor =	ndisc_constructor,
	.pconstructor =	pndisc_constructor,
	.pdestructor =	pndisc_destructor,
	.proxy_redo =	pndisc_redo,
	.id =		"ndisc_cache",
	.parms = {
		.tbl			= &nd_tbl,
		.reachable_time		= ND_REACHABLE_TIME,
		.data = {
			[NEIGH_VAR_MCAST_PROBES] = 3,
			[NEIGH_VAR_UCAST_PROBES] = 3,
			[NEIGH_VAR_RETRANS_TIME] = ND_RETRANS_TIMER,
			[NEIGH_VAR_BASE_REACHABLE_TIME] = ND_REACHABLE_TIME,
			[NEIGH_VAR_DELAY_PROBE_TIME] = 5 * HZ,
			[NEIGH_VAR_GC_STALETIME] = 60 * HZ,
			[NEIGH_VAR_QUEUE_LEN_BYTES] = 64 * 1024,
			[NEIGH_VAR_PROXY_QLEN] = 64,
			[NEIGH_VAR_ANYCAST_DELAY] = 1 * HZ,
			[NEIGH_VAR_PROXY_DELAY] = (8 * HZ) / 10,
                },
        },
	.gc_interval =	  30 * HZ,
	.gc_thresh1 =	 128,
	.gc_thresh2 =	 512,
	.gc_thresh3 =	1024,
};

EXPORT_SYMBOL_GPL(nd_tbl);


void __ndisc_fill_addr_option(struct sk_buff *skb, int type, void *data, int data_len, int pad) { int space = __ndisc_opt_addr_space(data_len, pad); u8 *opt = skb_put(skb, space); opt[0] = type; opt[1] = space>>3; memset(opt + 2, 0, pad); opt += pad; space -= pad; memcpy(opt+2, data, data_len); data_len += 2; opt += data_len; space -= data_len; if (space > 0) memset(opt, 0, space); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)6051.28%333.33%
Roland Dreier2420.51%111.11%
Hideaki Yoshifuji / 吉藤英明1815.38%333.33%
Alexander Aring119.40%111.11%
Ian Morris43.42%111.11%
Total117100.00%9100.00%

EXPORT_SYMBOL_GPL(__ndisc_fill_addr_option);
static inline void ndisc_fill_addr_option(struct sk_buff *skb, int type, void *data, u8 icmp6_type) { __ndisc_fill_addr_option(skb, type, data, skb->dev->addr_len, ndisc_addr_option_pad(skb->dev->type)); ndisc_ops_fill_addr_option(skb->dev, skb, icmp6_type); }

Contributors

PersonTokensPropCommitsCommitProp
Alexander Aring57100.00%2100.00%
Total57100.00%2100.00%


static inline void ndisc_fill_redirect_addr_option(struct sk_buff *skb, void *ha, const u8 *ops_data) { ndisc_fill_addr_option(skb, ND_OPT_TARGET_LL_ADDR, ha, NDISC_REDIRECT); ndisc_ops_fill_redirect_addr_option(skb->dev, skb, ops_data); }

Contributors

PersonTokensPropCommitsCommitProp
Alexander Aring43100.00%2100.00%
Total43100.00%2100.00%


static struct nd_opt_hdr *ndisc_next_option(struct nd_opt_hdr *cur, struct nd_opt_hdr *end) { int type; if (!cur || !end || cur >= end) return NULL; type = cur->nd_opt_type; do { cur = ((void *)cur) + (cur->nd_opt_len << 3); } while (cur < end && cur->nd_opt_type != type); return cur <= end && cur->nd_opt_type == type ? cur : NULL; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明91100.00%2100.00%
Total91100.00%2100.00%


static inline int ndisc_is_useropt(const struct net_device *dev, struct nd_opt_hdr *opt) { return opt->nd_opt_type == ND_OPT_RDNSS || opt->nd_opt_type == ND_OPT_DNSSL || ndisc_ops_is_useropt(dev, opt->nd_opt_type); }

Contributors

PersonTokensPropCommitsCommitProp
Pierre Ynard1947.50%133.33%
Alexander Aring1537.50%133.33%
Alexey I. Froloff615.00%133.33%
Total40100.00%3100.00%


static struct nd_opt_hdr *ndisc_next_useropt(const struct net_device *dev, struct nd_opt_hdr *cur, struct nd_opt_hdr *end) { if (!cur || !end || cur >= end) return NULL; do { cur = ((void *)cur) + (cur->nd_opt_len << 3); } while (cur < end && !ndisc_is_useropt(dev, cur)); return cur <= end && ndisc_is_useropt(dev, cur) ? cur : NULL; }

Contributors

PersonTokensPropCommitsCommitProp
Pierre Ynard8189.01%150.00%
Alexander Aring1010.99%150.00%
Total91100.00%2100.00%


struct ndisc_options *ndisc_parse_options(const struct net_device *dev, u8 *opt, int opt_len, struct ndisc_options *ndopts) { struct nd_opt_hdr *nd_opt = (struct nd_opt_hdr *)opt; if (!nd_opt || opt_len < 0 || !ndopts) return NULL; memset(ndopts, 0, sizeof(*ndopts)); while (opt_len) { int l; if (opt_len < sizeof(struct nd_opt_hdr)) return NULL; l = nd_opt->nd_opt_len << 3; if (opt_len < l || l == 0) return NULL; if (ndisc_ops_parse_options(dev, nd_opt, ndopts)) goto next_opt; switch (nd_opt->nd_opt_type) { case ND_OPT_SOURCE_LL_ADDR: case ND_OPT_TARGET_LL_ADDR: case ND_OPT_MTU: case ND_OPT_NONCE: case ND_OPT_REDIRECT_HDR: if (ndopts->nd_opt_array[nd_opt->nd_opt_type]) { ND_PRINTK(2, warn, "%s: duplicated ND6 option found: type=%d\n", __func__, nd_opt->nd_opt_type); } else { ndopts->nd_opt_array[nd_opt->nd_opt_type] = nd_opt; } break; case ND_OPT_PREFIX_INFO: ndopts->nd_opts_pi_end = nd_opt; if (!ndopts->nd_opt_array[nd_opt->nd_opt_type]) ndopts->nd_opt_array[nd_opt->nd_opt_type] = nd_opt; break; #ifdef CONFIG_IPV6_ROUTE_INFO case ND_OPT_ROUTE_INFO: ndopts->nd_opts_ri_end = nd_opt; if (!ndopts->nd_opts_ri) ndopts->nd_opts_ri = nd_opt; break; #endif default: if (ndisc_is_useropt(dev, nd_opt)) { ndopts->nd_useropts_end = nd_opt; if (!ndopts->nd_useropts) ndopts->nd_useropts = nd_opt; } else { /* * Unknown options must be silently ignored, * to accommodate future extension to the * protocol. */ ND_PRINTK(2, notice, "%s: ignored unsupported option; type=%d, len=%d\n", __func__, nd_opt->nd_opt_type, nd_opt->nd_opt_len); } } next_opt: opt_len -= l; nd_opt = ((void *)nd_opt) + l; } return ndopts; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明24976.85%327.27%
Pierre Ynard329.88%19.09%
Alexander Aring247.41%19.09%
Joe Perches123.70%218.18%
Erik Nordmark30.93%19.09%
Stephen Hemminger20.62%218.18%
Harvey Harrison20.62%19.09%
Total324100.00%11100.00%


int ndisc_mc_map(const struct in6_addr *addr, char *buf, struct net_device *dev, int dir) { switch (dev->type) { case ARPHRD_ETHER: case ARPHRD_IEEE802: /* Not sure. Check it later. --ANK */ case ARPHRD_FDDI: ipv6_eth_mc_map(addr, buf); return 0; case ARPHRD_ARCNET: ipv6_arcnet_mc_map(addr, buf); return 0; case ARPHRD_INFINIBAND: ipv6_ib_mc_map(addr, dev->broadcast, buf); return 0; case ARPHRD_IPGRE: return ipv6_ipgre_mc_map(addr, dev->broadcast, buf); default: if (dir) { memcpy(buf, dev->broadcast, dev->addr_len); return 0; } } return -EINVAL; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)7863.41%550.00%
Timo Teräs1512.20%110.00%
Roland Dreier1310.57%110.00%
Hideaki Yoshifuji / 吉藤英明129.76%110.00%
Rolf Manderscheid43.25%110.00%
Eric Dumazet10.81%110.00%
Total123100.00%10100.00%

EXPORT_SYMBOL(ndisc_mc_map);
static u32 ndisc_hash(const void *pkey, const struct net_device *dev, __u32 *hash_rnd) { return ndisc_hashfn(pkey, dev, hash_rnd); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)1961.29%125.00%
David S. Miller929.03%250.00%
Eric Dumazet39.68%125.00%
Total31100.00%4100.00%


static bool ndisc_key_eq(const struct neighbour *n, const void *pkey) { return neigh_key_eq128(n, pkey); }

Contributors

PersonTokensPropCommitsCommitProp
Eric W. Biedermann25100.00%1100.00%
Total25100.00%1100.00%


static int ndisc_constructor(struct neighbour *neigh) { struct in6_addr *addr = (struct in6_addr *)&neigh->primary_key; struct net_device *dev = neigh->dev; struct inet6_dev *in6_dev; struct neigh_parms *parms; bool is_multicast = ipv6_addr_is_multicast(addr); in6_dev = in6_dev_get(dev); if (!in6_dev) { return -EINVAL; } parms = in6_dev->nd_parms; __neigh_parms_put(neigh->parms); neigh->parms = neigh_parms_clone(parms); neigh->type = is_multicast ? RTN_MULTICAST : RTN_UNICAST; if (!dev->header_ops) { neigh->nud_state = NUD_NOARP; neigh->ops = &ndisc_direct_ops; neigh->output = neigh_direct_output; } else { if (is_multicast) { neigh->nud_state = NUD_NOARP; ndisc_mc_map(addr, neigh->ha, dev, 1); } else if (dev->flags&(IFF_NOARP|IFF_LOOPBACK)) { neigh->nud_state = NUD_NOARP; memcpy(neigh->ha, dev->dev_addr, dev->addr_len); if (dev->flags&IFF_LOOPBACK) neigh->type = RTN_LOCAL; } else if (dev->flags&IFF_POINTOPOINT) { neigh->nud_state = NUD_NOARP; memcpy(neigh->ha, dev->broadcast, dev->addr_len); } if (dev->header_ops->cache) neigh->ops = &ndisc_hh_ops; else neigh->ops = &ndisc_generic_ops; if (neigh->nud_state&NUD_VALID) neigh->output = neigh->ops->connected_output; else neigh->output = neigh->ops->output; } in6_dev_put(in6_dev); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)25484.39%753.85%
Herbert Xu299.63%17.69%
Hideaki Yoshifuji / 吉藤英明103.32%17.69%
Stephen Hemminger51.66%17.69%
David S. Miller10.33%17.69%
Eric Dumazet10.33%17.69%
Ian Morris10.33%17.69%
Total301100.00%13100.00%


static int pndisc_constructor(struct pneigh_entry *n) { struct in6_addr *addr = (struct in6_addr *)&n->key; struct in6_addr maddr; struct net_device *dev = n->dev; if (!dev || !__in6_dev_get(dev)) return -EINVAL; addrconf_addr_solict_mult(addr, &maddr); ipv6_dev_mc_inc(dev, &maddr); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)7095.89%675.00%
Ian Morris22.74%112.50%
Linus Torvalds11.37%112.50%
Total73100.00%8100.00%


static void pndisc_destructor(struct pneigh_entry *n) { struct in6_addr *addr = (struct in6_addr *)&n->key; struct in6_addr maddr; struct net_device *dev = n->dev; if (!dev || !__in6_dev_get(dev)) return; addrconf_addr_solict_mult(addr, &maddr); ipv6_dev_mc_dec(dev, &maddr); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)6495.52%675.00%
Ian Morris22.99%112.50%
Linus Torvalds11.49%112.50%
Total67100.00%8100.00%


static struct sk_buff *ndisc_alloc_skb(struct net_device *dev, int len) { int hlen = LL_RESERVED_SPACE(dev); int tlen = dev->needed_tailroom; struct sock *sk = dev_net(dev)->ipv6.ndisc_sk; struct sk_buff *skb; skb = alloc_skb(hlen + sizeof(struct ipv6hdr) + len + tlen, GFP_ATOMIC); if (!skb) { ND_PRINTK(0, err, "ndisc: %s failed to allocate an skb\n", __func__); return NULL; } skb->protocol = htons(ETH_P_IPV6); skb->dev = dev; skb_reserve(skb, hlen + sizeof(struct ipv6hdr)); skb_reset_transport_header(skb); /* Manually assign socket ownership as we avoid calling * sock_alloc_send_pskb() to bypass wmem buffer limits */ skb_set_owner_w(skb, sk); return skb; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明12391.79%480.00%
Thomas Graf118.21%120.00%
Total134100.00%5100.00%


static void ip6_nd_hdr(struct sk_buff *skb, const struct in6_addr *saddr, const struct in6_addr *daddr, int hop_limit, int len) { struct ipv6hdr *hdr; skb_push(skb, sizeof(*hdr)); skb_reset_network_header(skb); hdr = ipv6_hdr(skb); ip6_flow_hdr(hdr, 0, 0); hdr->payload_len = htons(len); hdr->nexthdr = IPPROTO_ICMPV6; hdr->hop_limit = hop_limit; hdr->saddr = *saddr; hdr->daddr = *daddr; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明101100.00%3100.00%
Total101100.00%3100.00%


static void ndisc_send_skb(struct sk_buff *skb, const struct in6_addr *daddr, const struct in6_addr *saddr) { struct dst_entry *dst = skb_dst(skb); struct net *net = dev_net(skb->dev); struct sock *sk = net->ipv6.ndisc_sk; struct inet6_dev *idev; int err; struct icmp6hdr *icmp6h = icmp6_hdr(skb); u8 type; type = icmp6h->icmp6_type; if (!dst) { struct flowi6 fl6; int oif = skb->dev->ifindex; icmpv6_flow_init(sk, &fl6, type, saddr, daddr, oif); dst = icmp6_dst_alloc(skb->dev, &fl6); if (IS_ERR(dst)) { kfree_skb(skb); return; } skb_dst_set(skb, dst); } icmp6h->icmp6_cksum = csum_ipv6_magic(saddr, daddr, skb->len, IPPROTO_ICMPV6, csum_partial(icmp6h, skb->len, 0)); ip6_nd_hdr(skb, saddr, daddr, inet6_sk(sk)->hop_limit, skb->len); rcu_read_lock(); idev = __in6_dev_get(dst->dev); IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUT, skb->len); err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, net, sk, skb, NULL, dst->dev, dst_output); if (!err) { ICMP6MSGOUT_INC_STATS(net, idev, type); ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTMSGS); } rcu_read_unlock(); }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明9333.57%722.58%
Brian Haley8430.32%13.23%
jlut@cs.hut.fi196.86%13.23%
Randy Dunlap134.69%13.23%
David Ahern124.33%26.45%
Linus Torvalds (pre-git)124.33%39.68%
Eric Dumazet103.61%26.45%
David S. Miller93.25%39.68%
Neil Horman62.17%13.23%
Denis V. Lunev62.17%39.68%
Eric W. Biedermann31.08%26.45%
Shirley Ma31.08%13.23%
Kazunori Miyazawa31.08%13.23%
David L Stevens20.72%13.23%
Jan Engelhardt10.36%13.23%
Patrick McHardy10.36%13.23%
Total277100.00%31100.00%


void ndisc_send_na(struct net_device *dev, const struct in6_addr *daddr, const struct in6_addr *solicited_addr, bool router, bool solicited, bool override, bool inc_opt) { struct sk_buff *skb; struct in6_addr tmpaddr; struct inet6_ifaddr *ifp; const struct in6_addr *src_addr; struct nd_msg *msg; int optlen = 0; /* for anycast or proxy, solicited_addr != src_addr */ ifp = ipv6_get_ifaddr(dev_net(dev), solicited_addr, dev, 1); if (ifp) { src_addr = solicited_addr; if (ifp->flags & IFA_F_OPTIMISTIC) override = false; inc_opt |= ifp->idev->cnf.force_tllao; in6_ifa_put(ifp); } else { if (ipv6_dev_get_saddr(dev_net(dev), dev, daddr, inet6_sk(dev_net(dev)->ipv6.ndisc_sk)->srcprefs, &tmpaddr)) return; src_addr = &tmpaddr; } if (!dev->addr_len) inc_opt = 0; if (inc_opt) optlen += ndisc_opt_addr_space(dev, NDISC_NEIGHBOUR_ADVERTISEMENT); skb = ndisc_alloc_skb(dev, sizeof(*msg) + optlen); if (!skb) return; msg = (struct nd_msg *)skb_put(skb, sizeof(*msg)); *msg = (struct nd_msg) { .icmph = { .icmp6_type = NDISC_NEIGHBOUR_ADVERTISEMENT, .icmp6_router = router, .icmp6_solicited = solicited, .icmp6_override = override, }, .target = *solicited_addr, }; if (inc_opt) ndisc_fill_addr_option(skb, ND_OPT_TARGET_LL_ADDR, dev->dev_addr, NDISC_NEIGHBOUR_ADVERTISEMENT); ndisc_send_skb(skb, daddr, src_addr); }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明23782.58%738.89%
Linus Torvalds (pre-git)206.97%316.67%
Stephen Hemminger103.48%15.56%
Kazunori Miyazawa51.74%15.56%
Brian Haley51.74%15.56%
Alexander Aring41.39%15.56%
Randy Dunlap31.05%15.56%
Daniel Lezcano20.70%211.11%
Daniel Baluta10.35%15.56%
Total287100.00%18100.00%


static void ndisc_send_unsol_na(struct net_device *dev) { struct inet6_dev *idev; struct inet6_ifaddr *ifa; idev = in6_dev_get(dev); if (!idev) return; read_lock_bh(&idev->lock); list_for_each_entry(ifa, &idev->addr_list, if_list) { ndisc_send_na(dev, &in6addr_linklocal_allnodes, &ifa->addr, /*router=*/ !!idev->cnf.forwarding, /*solicited=*/ false, /*override=*/ true, /*inc_opt=*/ true); } read_unlock_bh(&idev->lock); in6_dev_put(idev); }

Contributors

PersonTokensPropCommitsCommitProp
Ben Hutchings9598.96%150.00%
Hideaki Yoshifuji / 吉藤英明11.04%150.00%
Total96100.00%2100.00%


void ndisc_send_ns(struct net_device *dev, const struct in6_addr *solicit, const struct in6_addr *daddr, const struct in6_addr *saddr, u64 nonce) { struct sk_buff *skb; struct in6_addr addr_buf; int inc_opt = dev->addr_len; int optlen = 0; struct nd_msg *msg; if (!saddr) { if (ipv6_get_lladdr(dev, &addr_buf, (IFA_F_TENTATIVE|IFA_F_OPTIMISTIC))) return; saddr = &addr_buf; } if (ipv6_addr_any(saddr)) inc_opt = false; if (inc_opt) optlen += ndisc_opt_addr_space(dev, NDISC_NEIGHBOUR_SOLICITATION); if (nonce != 0) optlen += 8; skb = ndisc_alloc_skb(dev, sizeof(*msg) + optlen); if (!skb) return; msg = (struct nd_msg *)skb_put(skb, sizeof(*msg)); *msg = (struct nd_msg) { .icmph = { .icmp6_type = NDISC_NEIGHBOUR_SOLICITATION, }, .target = *solicit, }; if (inc_opt) ndisc_fill_addr_option(skb, ND_OPT_SOURCE_LL_ADDR, dev->dev_addr, NDISC_NEIGHBOUR_SOLICITATION); if (nonce != 0) { u8 *opt = skb_put(skb, 8); opt[0] = ND_OPT_NONCE; opt[1] = 8 >> 3; memcpy(opt + 2, &nonce, 6); } ndisc_send_skb(skb, daddr, saddr); }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明15058.37%428.57%
Erik Nordmark6023.35%17.14%
Linus Torvalds238.95%214.29%
Linus Torvalds (pre-git)83.11%214.29%
Neil Horman62.33%17.14%
Alexander Aring41.56%17.14%
Kazunori Miyazawa41.56%17.14%
Ian Morris10.39%17.14%
Daniel Baluta10.39%17.14%
Total257100.00%14100.00%


void ndisc_send_rs(struct net_device *dev, const struct in6_addr *saddr, const struct in6_addr *daddr) { struct sk_buff *skb; struct rs_msg *msg; int send_sllao = dev->addr_len; int optlen = 0; #ifdef CONFIG_IPV6_OPTIMISTIC_DAD /* * According to section 2.2 of RFC 4429, we must not * send router solicitations with a sllao from * optimistic addresses, but we may send the solicitation * if we don't include the sllao. So here we check * if our address is optimistic, and if so, we * suppress the inclusion of the sllao. */ if (send_sllao) { struct inet6_ifaddr *ifp = ipv6_get_ifaddr(dev_net(dev), saddr, dev, 1); if (ifp) { if (ifp->flags & IFA_F_OPTIMISTIC) { send_sllao = 0; } in6_ifa_put(ifp); } else { send_sllao = 0; } } #endif if (send_sllao) optlen += ndisc_opt_addr_space(dev, NDISC_ROUTER_SOLICITATION); skb = ndisc_alloc_skb(dev, sizeof(*msg) + optlen); if (!skb) return; msg = (struct rs_msg *)skb_put(skb, sizeof(*msg)); *msg = (struct rs_msg) { .icmph = { .icmp6_type = NDISC_ROUTER_SOLICITATION, }, }; if (send_sllao) ndisc_fill_addr_option(skb, ND_OPT_SOURCE_LL_ADDR, dev->dev_addr, NDISC_ROUTER_SOLICITATION); ndisc_send_skb(skb, daddr, saddr); }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明17083.33%637.50%
Linus Torvalds (pre-git)2210.78%425.00%
Alexander Aring41.96%16.25%
David S. Miller31.47%16.25%
Daniel Lezcano20.98%212.50%
Linus Torvalds20.98%16.25%
Joe Perches10.49%16.25%
Total204100.00%16100.00%


static void ndisc_error_report(struct neighbour *neigh, struct sk_buff *skb) { /* * "The sender MUST return an ICMP * destination unreachable" */ dst_link_failure(skb); kfree_skb(skb); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)2592.59%375.00%
Hideaki Yoshifuji / 吉藤英明27.41%125.00%
Total27100.00%4100.00%

/* Called with locked neigh: either read or both */
static void ndisc_solicit(struct neighbour *neigh, struct sk_buff *skb) { struct in6_addr *saddr = NULL; struct in6_addr mcaddr; struct net_device *dev = neigh->dev; struct in6_addr *target = (struct in6_addr *)&neigh->primary_key; int probes = atomic_read(&neigh->probes); if (skb && ipv6_chk_addr_and_flags(dev_net(dev), &ipv6_hdr(skb)->saddr, dev, 1, IFA_F_TENTATIVE|IFA_F_OPTIMISTIC)) saddr = &ipv6_hdr(skb)->saddr; probes -= NEIGH_VAR(neigh->parms, UCAST_PROBES); if (probes < 0) { if (!(neigh->nud_state & NUD_VALID)) { ND_PRINTK(1, dbg, "%s: trying to ucast probe in NUD_INVALID: %pI6\n", __func__, target); } ndisc_send_ns(dev, target, target, saddr, 0); } else if ((probes -= NEIGH_VAR(neigh->parms, APP_PROBES)) < 0) { neigh_app_ns(neigh); } else { addrconf_addr_solict_mult(target, &mcaddr); ndisc_send_ns(dev, target, &mcaddr, saddr, 0); } }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)15775.48%630.00%
Jiri Pirko104.81%15.00%
Hideaki Yoshifuji / 吉藤英明94.33%210.00%
Arnaldo Carvalho de Melo62.88%15.00%
Joe Perches62.88%210.00%
Erik Kline52.40%15.00%
Erik Nordmark41.92%15.00%
Ian Morris41.92%15.00%
Daniel Lezcano31.44%210.00%
Ville Nuorvala20.96%15.00%
Harvey Harrison10.48%15.00%
Linus Torvalds10.48%15.00%
Total208100.00%20100.00%


static int pndisc_is_router(const void *pkey, struct net_device *dev) { struct pneigh_entry *n; int ret = -1; read_lock_bh(&nd_tbl.lock); n = __pneigh_lookup(&nd_tbl, dev_net(dev), pkey, dev); if (n) ret = !!(n->flags & NTF_ROUTER); read_unlock_bh(&nd_tbl.lock); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Pavel Emelyanov5772.15%133.33%
Hideaki Yoshifuji / 吉藤英明1822.78%133.33%
David S. Miller45.06%133.33%
Total79100.00%3100.00%


void ndisc_update(const struct net_device *dev, struct neighbour *neigh, const u8 *lladdr, u8 new, u32 flags, u8 icmp6_type, struct ndisc_options *ndopts) { neigh_update(neigh, lladdr, new, flags); /* report ndisc ops about neighbour update */ ndisc_ops_update(dev, neigh, flags, icmp6_type, ndopts); }

Contributors

PersonTokensPropCommitsCommitProp
Alexander Aring60100.00%1100.00%
Total60100.00%1100.00%


static void ndisc_recv_ns(struct sk_buff *skb) { struct nd_msg *msg = (struct nd_msg *)skb_transport_header(skb); const struct in6_addr *saddr = &ipv6_hdr(skb)->saddr; const struct in6_addr *daddr = &ipv6_hdr(skb)->daddr; u8 *lladdr = NULL; u32 ndoptlen = skb_tail_pointer(skb) - (skb_transport_header(skb) + offsetof(struct nd_msg, opt)); struct ndisc_options ndopts; struct net_device *dev = skb->dev; struct inet6_ifaddr *ifp; struct inet6_dev *idev = NULL; struct neighbour *neigh; int dad = ipv6_addr_any(saddr); bool inc; int is_router = -1; u64 nonce = 0; if (skb->len < sizeof(struct nd_msg)) { ND_PRINTK(2, warn, "NS: packet too short\n"); return; } if (ipv6_addr_is_multicast(&msg->target)) { ND_PRINTK(2, warn, "NS: multicast target address\n"); return; } /* * RFC2461 7.1.1: * DAD has to be destined for solicited node multicast address. */ if (dad && !ipv6_addr_is_solict_mult(daddr)) { ND_PRINTK(2, warn, "NS: bad DAD packet (wrong destination)\n"); return; } if (!ndisc_parse_options(dev, msg->opt, ndoptlen, &ndopts)) { ND_PRINTK(2, warn, "NS: invalid ND options\n"); return; } if (ndopts.nd_opts_src_lladdr) { lladdr = ndisc_opt_addr_data(ndopts.nd_opts_src_lladdr, dev); if (!lladdr) { ND_PRINTK(2, warn, "NS: invalid link-layer address length\n"); return; } /* RFC2461 7.1.1: * If the IP source address is the unspecified address, * there MUST NOT be source link-layer address option * in the message. */ if (dad) { ND_PRINTK(2, warn, "NS: bad DAD packet (link-layer address option)\n"); return; } } if (ndopts.nd_opts_nonce) memcpy(&nonce, (u8 *)(ndopts.nd_opts_nonce + 1), 6); inc = ipv6_addr_is_multicast(daddr); ifp = ipv6_get_ifaddr(dev_net(dev), &msg->target, dev, 1); if (ifp) { have_ifp: if (ifp->flags & (IFA_F_TENTATIVE|IFA_F_OPTIMISTIC)) { if (dad) { if (nonce != 0 && ifp->dad_nonce == nonce) { u8 *np = (u8 *)&nonce; /* Matching nonce if looped back */ ND_PRINTK(2, notice, "%s: IPv6 DAD loopback for address %pI6c nonce %pM ignored\n", ifp->idev->dev->name, &ifp->addr, np); goto out; } /* * We are colliding with another node * who is doing DAD * so fail our DAD process */ addrconf_dad_failure(ifp); return; } else { /* * This is not a dad solicitation. * If we are an optimistic node, * we should respond. * Otherwise, we should ignore it. */ if (!(ifp->flags & IFA_F_OPTIMISTIC)) goto out; } } idev = ifp->idev; } else { struct net *net = dev_net(dev); /* perhaps an address on the master device */ if (netif_is_l3_slave(dev)) { struct net_device *mdev; mdev = netdev_master_upper_dev_get_rcu(dev); if (mdev) { ifp = ipv6_get_ifaddr(net, &msg->target, mdev, 1); if (ifp) goto have_ifp; } } idev = in6_dev_get(dev); if (!idev) { /* XXX: count this drop? */ return; } if (ipv6_chk_acast_addr(net, dev, &msg->target) || (idev->cnf.forwarding && (net->ipv6.devconf_all->proxy_ndp || idev->cnf.proxy_ndp) && (is_router = pndisc_is_router(&msg->target, dev)) >= 0)) { if (!(NEIGH_CB(skb)->flags & LOCALLY_ENQUEUED) && skb->pkt_type != PACKET_HOST && inc && NEIGH_VAR(idev->nd_parms, PROXY_DELAY) != 0) { /* * for anycast or proxy, * sender should delay its response * by a random time between 0 and * MAX_ANYCAST_DELAY_TIME seconds. * (RFC2461) -- yoshfuji */ struct sk_buff *n = skb_clone(skb, GFP_ATOMIC); if (n) pneigh_enqueue(&nd_tbl, idev->nd_parms, n); goto out; } } else goto out; } if (is_router < 0) is_router = idev->cnf.forwarding; if (dad) { ndisc_send_na(dev, &in6addr_linklocal_allnodes, &msg->target, !!is_router, false, (ifp != NULL), true); goto out; } if (inc) NEIGH_CACHE_STAT_INC(&nd_tbl, rcv_probes_mcast); else NEIGH_CACHE_STAT_INC(&nd_tbl, rcv_probes_ucast); /* * update / create cache entry * for the source address */ neigh = __neigh_lookup(&nd_tbl, saddr, dev, !inc || lladdr || !dev->addr_len); if (neigh) ndisc_update(dev, neigh, lladdr, NUD_STALE, NEIGH_UPDATE_F_WEAK_OVERRIDE| NEIGH_UPDATE_F_OVERRIDE, NDISC_NEIGHBOUR_SOLICITATION, &ndopts); if (neigh || !dev->header_ops) { ndisc_send_na(dev, saddr, &msg->target, !!is_router, true, (ifp != NULL && inc), inc); if (neigh) neigh_release(neigh); } out: if (ifp) in6_ifa_put(ifp); else in6_dev_put(idev); }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明39346.79%2037.74%
Erik Nordmark8410.00%11.89%
David L Stevens789.29%11.89%
Linus Torvalds (pre-git)748.81%611.32%
David Ahern536.31%11.89%
Joe Perches303.57%11.89%
Neil Horman252.98%11.89%
Ville Nuorvala202.38%23.77%
Arnaldo Carvalho de Melo192.26%35.66%
David S. Miller101.19%11.89%
Alexander Aring101.19%11.89%
Daniel Lezcano80.95%35.66%
Patrick McHardy80.95%11.89%
Alexey Kuznetsov70.83%11.89%
Simon Horman60.71%11.89%
Jiri Pirko50.60%11.89%
Eric Dumazet30.36%23.77%
Roland Dreier20.24%11.89%
Eric W. Biedermann10.12%11.89%
Denis V. Lunev10.12%11.89%
Stephen Hemminger10.12%11.89%
Pavel Emelyanov10.12%11.89%
Andi Kleen10.12%11.89%
Total840100.00%53100.00%


static void ndisc_recv_na(struct sk_buff *skb) { struct nd_msg *msg = (struct nd_msg *)skb_transport_header(skb); struct in6_addr *saddr = &ipv6_hdr(skb)->saddr; const struct in6_addr *daddr = &ipv6_hdr(skb)->daddr; u8 *lladdr = NULL; u32 ndoptlen = skb_tail_pointer(skb) - (skb_transport_header(skb) + offsetof(struct nd_msg, opt)); struct ndisc_options ndopts; struct net_device *dev = skb->dev; struct inet6_dev *idev = __in6_dev_get(dev); struct inet6_ifaddr *ifp; struct neighbour *neigh; if (skb->len < sizeof(struct nd_msg)) { ND_PRINTK(2, warn, "NA: packet too short\n"); return; } if (ipv6_addr_is_multicast(&msg->target)) { ND_PRINTK(2, warn, "NA: target address is multicast\n"); return; } if (ipv6_addr_is_multicast(daddr) && msg->icmph.icmp6_solicited) { ND_PRINTK(2, warn, "NA: solicited NA is multicasted\n"); return; } /* For some 802.11 wireless deployments (and possibly other networks), * there will be a NA proxy and unsolicitd packets are attacks * and thus should not be accepted. */ if (!msg->icmph.icmp6_solicited && idev && idev->cnf.drop_unsolicited_na) return; if (!ndisc_parse_options(dev, msg->opt, ndoptlen, &ndopts)) { ND_PRINTK(2, warn, "NS: invalid ND option\n"); return; } if (ndopts.nd_opts_tgt_lladdr) { lladdr = ndisc_opt_addr_data(ndopts.nd_opts_tgt_lladdr, dev); if (!lladdr) { ND_PRINTK(2, warn, "NA: invalid link-layer address length\n"); return; } } ifp = ipv6_get_ifaddr(dev_net(dev), &msg->target, dev, 1); if (ifp) { if (skb->pkt_type != PACKET_LOOPBACK && (ifp->flags & IFA_F_TENTATIVE)) { addrconf_dad_failure(ifp); return; } /* What should we make now? The advertisement is invalid, but ndisc specs say nothing about it. It could be misconfiguration, or an smart proxy agent tries to help us :-) We should not print the error if NA has been received from loopback - it is just our own unsolicited advertisement. */ if (skb->pkt_type != PACKET_LOOPBACK) ND_PRINTK(1, warn, "NA: someone advertises our address %pI6 on %s!\n", &ifp->addr, ifp->idev->dev->name); in6_ifa_put(ifp); return; } neigh = neigh_lookup(&nd_tbl, &msg->target, dev); if (neigh) { u8 old_flags = neigh->flags; struct net *net = dev_net(dev); if (neigh->nud_state & NUD_FAILED) goto out; /* * Don't update the neighbor cache entry on a proxy NA from * ourselves because either the proxied node is off link or it * has already sent a NA to us. */ if (lladdr && !memcmp(lladdr, dev->dev_addr, dev->addr_len) && net->ipv6.devconf_all->forwarding && net->ipv6.devconf_all->proxy_ndp && pneigh_lookup(&nd_tbl, net, &msg->target, dev, 0)) { /* XXX: idev->cnf.proxy_ndp */ goto out; } ndisc_update(dev, neigh, lladdr, msg->icmph.icmp6_solicited ? NUD_REACHABLE : NUD_STALE, NEIGH_UPDATE_F_WEAK_OVERRIDE| (msg->icmph.icmp6_override ? NEIGH_UPDATE_F_OVERRIDE : 0)| NEIGH_UPDATE_F_OVERRIDE_ISROUTER| (msg->icmph.icmp6_router ? NEIGH_UPDATE_F_ISROUTER : 0), NDISC_NEIGHBOUR_ADVERTISEMENT, &ndopts); if ((old_flags & ~neigh->flags) & NTF_ROUTER) { /* * Change: router to host */ rt6_clean_tohost(dev_net(dev), saddr); } out: neigh_release(neigh); } }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明28251.46%1029.41%
Linus Torvalds (pre-git)8816.06%514.71%
Ville Nuorvala386.93%25.88%
Joe Perches366.57%12.94%
Johannes Berg295.29%12.94%
Arnaldo Carvalho de Melo193.47%38.82%
Alexander Aring101.82%12.94%
Jan Sembera91.64%12.94%
Daniel Walter81.46%12.94%
Daniel Lezcano71.28%25.88%
Simon Horman61.09%12.94%
Jens Rosenboom50.91%12.94%
Duan Jiong50.91%12.94%
Eric W. Biedermann20.36%12.94%
Roland Dreier20.36%12.94%
Nicolas Dichtel10.18%12.94%
Eric Dumazet10.18%12.94%
Total548100.00%34100.00%


static void ndisc_recv_rs(struct sk_buff *skb) { struct rs_msg *rs_msg = (struct rs_msg *)skb_transport_header(skb); unsigned long ndoptlen = skb->len - sizeof(*rs_msg); struct neighbour *neigh; struct inet6_dev *idev; const struct in6_addr *saddr = &ipv6_hdr(skb)->saddr; struct ndisc_options ndopts; u8 *lladdr = NULL; if (skb->len < sizeof(*rs_msg)) return; idev = __in6_dev_get(skb->dev); if (!idev) { ND_PRINTK(1, err, "RS: can't find in6 device\n"); return; } /* Don't accept RS if we're not in router mode */ if (!idev->cnf.forwarding) goto out; /* * Don't update NCE if src = ::; * this implies that the source node has no ip address assigned yet. */ if (ipv6_addr_any(saddr)) goto out; /* Parse ND options */ if (!ndisc_parse_options(skb->dev, rs_msg->opt, ndoptlen, &ndopts)) { ND_PRINTK(2, notice, "NS: invalid ND option, ignored\n"); goto out; } if (ndopts.nd_opts_src_lladdr) { lladdr = ndisc_opt_addr_data(ndopts.nd_opts_src_lladdr, skb->dev); if (!lladdr) goto out; } neigh = __neigh_lookup(&nd_tbl, saddr, skb->dev, 1); if (neigh) { ndisc_update(skb->dev, neigh, lladdr, NUD_STALE, NEIGH_UPDATE_F_WEAK_OVERRIDE| NEIGH_UPDATE_F_OVERRIDE| NEIGH_UPDATE_F_OVERRIDE_ISROUTER, NDISC_ROUTER_SOLICITATION, &ndopts); neigh_release(neigh); } out: return; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明21584.65%222.22%
Alexander Aring145.51%111.11%
Joe Perches124.72%111.11%
Arnaldo Carvalho de Melo62.36%222.22%
Roland Dreier41.57%111.11%
Eric Dumazet31.18%222.22%
Total254100.00%9100.00%


static void ndisc_ra_useropt(struct sk_buff *ra, struct nd_opt_hdr *opt) { struct icmp6hdr *icmp6h = (struct icmp6hdr *)skb_transport_header(ra); struct sk_buff *skb; struct nlmsghdr *nlh; struct nduseroptmsg *ndmsg; struct net *net = dev_net(ra->dev); int err; int base_size = NLMSG_ALIGN(sizeof(struct nduseroptmsg) + (opt->nd_opt_len << 3)); size_t msg_size = base_size + nla_total_size(sizeof(struct in6_addr)); skb = nlmsg_new(msg_size, GFP_ATOMIC); if (!skb) { err = -ENOBUFS; goto errout; } nlh = nlmsg_put(skb, 0, 0, RTM_NEWNDUSEROPT, base_size, 0); if (!nlh) { goto nla_put_failure; } ndmsg = nlmsg_data(nlh); ndmsg->nduseropt_family = AF_INET6; ndmsg->nduseropt_ifindex = ra->dev->ifindex; ndmsg->nduseropt_icmp_type = icmp6h->icmp6_type; ndmsg->nduseropt_icmp_code = icmp6h->icmp6_code; ndmsg->nduseropt_opts_len = opt->nd_opt_len << 3; memcpy(ndmsg + 1, opt, opt->nd_opt_len << 3); if (nla_put_in6_addr(skb, NDUSEROPT_SRCADDR, &ipv6_hdr(ra)->saddr)) goto nla_put_failure; nlmsg_end(skb, nlh); rtnl_notify(skb, net, 0, RTNLGRP_ND_USEROPT, NULL, GFP_ATOMIC); return; nla_put_failure: nlmsg_free(skb); err = -EMSGSIZE; errout: rtnl_set_sk_err(net, RTNLGRP_ND_USEROPT, err); }

Contributors

PersonTokensPropCommitsCommitProp
Pierre Ynard25190.94%225.00%
Daniel Lezcano113.99%112.50%
David S. Miller62.17%112.50%
Hideaki Yoshifuji / 吉藤英明31.09%112.50%
Denis V. Lunev20.72%112.50%
Ian Morris20.72%112.50%
Jiri Benc10.36%112.50%
Total276100.00%8100.00%


static void ndisc_router_discovery(struct sk_buff *skb) { struct ra_msg *ra_msg = (struct ra_msg *)skb_transport_header(skb); struct neighbour *neigh = NULL; struct inet6_dev *in6_dev; struct rt6_info *rt = NULL; int lifetime; struct ndisc_options ndopts; int optlen; unsigned int pref = 0; __u32 old_if_flags; bool send_ifinfo_notify = false; __u8 *opt = (__u8 *)(ra_msg + 1); optlen = (skb_tail_pointer(skb) - skb_transport_header(skb)) - sizeof(struct ra_msg); ND_PRINTK(2, info, "RA: %s, dev: %s\n", __func__, skb->dev->name); if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL)) { ND_PRINTK(2, warn, "RA: source address is not link-local\n"); return; } if (optlen < 0) { ND_PRINTK(2, warn, "RA: packet too short\n"); return; } #ifdef CONFIG_IPV6_NDISC_NODETYPE if (skb->ndisc_nodetype == NDISC_NODETYPE_HOST) { ND_PRINTK(2, warn, "RA: from host or unauthorized router\n"); return; } #endif /* * set the RA_RECV flag in the interface */ in6_dev = __in6_dev_get(skb->dev); if (!in6_dev) { ND_PRINTK(0, err, "RA: can't find inet6 device for %s\n", skb->dev->name); return; } if (!ndisc_parse_options(skb->dev, opt, optlen, &ndopts)) { ND_PRINTK(2, warn, "RA: invalid ND options\n"); return; } if (!ipv6_accept_ra(in6_dev)) { ND_PRINTK(2, info, "RA: %s, did not accept ra for dev: %s\n", __func__, skb->dev->name); goto skip_linkparms; } #ifdef CONFIG_IPV6_NDISC_NODETYPE /* skip link-specific parameters from interior routers */ if (skb->ndisc_nodetype == NDISC_NODETYPE_NODEFAULT) { ND_PRINTK(2, info, "RA: %s, nodetype is NODEFAULT, dev: %s\n", __func__, skb->dev->name); goto skip_linkparms; } #endif if (in6_dev->if_flags & IF_RS_SENT) { /* * flag that an RA was received after an RS was sent * out on this interface. */ in6_dev->if_flags |= IF_RA_RCVD; } /* * Remember the managed/otherconf flags from most recently * received RA message (RFC 2462) -- yoshfuji */ old_if_flags = in6_dev->if_flags; in6_dev->if_flags = (in6_dev->if_flags & ~(IF_RA_MANAGED | IF_RA_OTHERCONF)) | (ra_msg->icmph.icmp6_addrconf_managed ? IF_RA_MANAGED : 0) | (ra_msg->icmph.icmp6_addrconf_other ? IF_RA_OTHERCONF : 0); if (old_if_flags != in6_dev->if_flags) send_ifinfo_notify = true; if (!in6_dev->cnf.accept_ra_defrtr) { ND_PRINTK(2, info, "RA: %s, defrtr is false for dev: %s\n", __func__, skb->dev->name); goto skip_defrtr; } /* Do not accept RA with source-addr found on local machine unless * accept_ra_from_local is set to true. */ if (!in6_dev->cnf.accept_ra_from_local && ipv6_chk_addr(dev_net(in6_dev->dev), &ipv6_hdr(skb)->saddr, in6_dev->dev, 0)) { ND_PRINTK(2, info, "RA from local address detected on dev: %s: default router ignored\n", skb->dev->name); goto skip_defrtr; } lifetime = ntohs(ra_msg->icmph.icmp6_rt_lifetime); #ifdef CONFIG_IPV6_ROUTER_PREF pref = ra_msg->icmph.icmp6_router_pref; /* 10b is handled as if it were 00b (medium) */ if (pref == ICMPV6_ROUTER_PREF_INVALID || !in6_dev->cnf.accept_ra_rtr_pref) pref = ICMPV6_ROUTER_PREF_MEDIUM; #endif rt = rt6_get_dflt_router(&ipv6_hdr(skb)->saddr, skb->dev); if (rt) { neigh = dst_neigh_lookup(&rt->dst, &ipv6_hdr(skb)->saddr); if (!neigh) { ND_PRINTK(0, err, "RA: %s got default router without neighbour\n", __func__); ip6_rt_put(rt); return; } } if (rt && lifetime == 0) { ip6_del_rt(rt); rt = NULL; } ND_PRINTK(3, info, "RA: rt: %p lifetime: %d, for dev: %s\n", rt, lifetime, skb->dev->name); if (!rt && lifetime) { ND_PRINTK(3, info, "RA: adding default router\n"); rt = rt6_add_dflt_router(&ipv6_hdr(skb)->saddr, skb->dev, pref); if (!rt) { ND_PRINTK(0, err, "RA: %s failed to add default route\n", __func__); return; } neigh = dst_neigh_lookup(&rt->dst, &ipv6_hdr(skb)->saddr); if (!neigh) { ND_PRINTK(0, err, "RA: %s got default router without neighbour\n", __func__); ip6_rt_put(rt); return; } neigh->flags |= NTF_ROUTER; } else if (rt) { rt->rt6i_flags = (rt->rt6i_flags & ~RTF_PREF_MASK) | RTF_PREF(pref); } if (rt) rt6_set_expires(rt, jiffies + (HZ * lifetime)); if (in6_dev->cnf.accept_ra_min_hop_limit < 256 && ra_msg->icmph.icmp6_hop_limit) { if (in6_dev->cnf.accept_ra_min_hop_limit <= ra_msg->icmph.icmp6_hop_limit) { in6_dev->cnf.hop_limit = ra_msg->icmph.icmp6_hop_limit; if (rt) dst_metric_set(&rt->dst, RTAX_HOPLIMIT, ra_msg->icmph.icmp6_hop_limit); } else { ND_PRINTK(2, warn, "RA: Got route advertisement with lower hop_limit than minimum\n"); } } skip_defrtr: /* * Update Reachable Time and Retrans Timer */ if (in6_dev->nd_parms) { unsigned long rtime = ntohl(ra_msg->retrans_timer); if (rtime && rtime/1000 < MAX_SCHEDULE_TIMEOUT/HZ) { rtime = (rtime*HZ)/1000; if (rtime < HZ/10) rtime = HZ/10; NEIGH_VAR_SET(in6_dev->nd_parms, RETRANS_TIME, rtime); in6_dev->tstamp = jiffies; send_ifinfo_notify = true; } rtime = ntohl(ra_msg->reachable_time); if (rtime && rtime/1000 < MAX_SCHEDULE_TIMEOUT/(3*HZ)) { rtime = (rtime*HZ)/1000; if (rtime < HZ/10) rtime = HZ/10; if (rtime != NEIGH_VAR(in6_dev->nd_parms, BASE_REACHABLE_TIME)) { NEIGH_VAR_SET(in6_dev->nd_parms, BASE_REACHABLE_TIME, rtime); NEIGH_VAR_SET(in6_dev->nd_parms, GC_STALETIME, 3 * rtime); in6_dev->nd_parms->reachable_time = neigh_rand_reach_time(rtime); in6_dev->tstamp = jiffies; send_ifinfo_notify = true; } } } /* * Send a notify if RA changed managed/otherconf flags or timer settings */ if (send_ifinfo_notify) inet6_ifinfo_notify(RTM_NEWLINK, in6_dev); skip_linkparms: /* * Process options. */ if (!neigh) neigh = __neigh_lookup(&nd_tbl, &ipv6_hdr(skb)->saddr, skb->dev, 1); if (neigh) { u8 *lladdr = NULL; if (ndopts.nd_opts_src_lladdr) { lladdr = ndisc_opt_addr_data(ndopts.nd_opts_src_lladdr, skb->dev); if (!lladdr) { ND_PRINTK(2, warn, "RA: invalid link-layer address length\n"); goto out; } } ndisc_update(skb->dev, neigh, lladdr, NUD_STALE, NEIGH_UPDATE_F_WEAK_OVERRIDE| NEIGH_UPDATE_F_OVERRIDE| NEIGH_UPDATE_F_OVERRIDE_ISROUTER| NEIGH_UPDATE_F_ISROUTER, NDISC_ROUTER_ADVERTISEMENT, &ndopts); } if (!ipv6_accept_ra(in6_dev)) { ND_PRINTK(2, info, "RA: %s, accept_ra is false for dev: %s\n", __func__, skb->dev->name); goto out; } #ifdef CONFIG_IPV6_ROUTE_INFO if (!in6_dev->cnf.accept_ra_from_local && ipv6_chk_addr(dev_net(in6_dev->dev), &ipv6_hdr(skb)->saddr, in6_dev->dev, 0)) { ND_PRINTK(2, info, "RA from local address detected on dev: %s: router info ignored.\n", skb->dev->name); goto skip_routeinfo; } if (in6_dev->cnf.accept_ra_rtr_pref && ndopts.nd_opts_ri) { struct nd_opt_hdr *p; for (p = ndopts.nd_opts_ri; p; p = ndisc_next_option(p, ndopts.nd_opts_ri_end)) { struct route_info *ri = (struct route_info *)p; #ifdef CONFIG_IPV6_NDISC_NODETYPE if (skb->ndisc_nodetype == NDISC_NODETYPE_NODEFAULT && ri->prefix_len == 0) continue; #endif if (ri->prefix_len == 0 && !in6_dev->cnf.accept_ra_defrtr) continue; if (ri->prefix_len > in6_dev->cnf.accept_ra_rt_info_max_plen) continue; rt6_route_rcv(skb->dev, (u8 *)p, (p->nd_opt_len) << 3, &ipv6_hdr(skb)->saddr); } } skip_routeinfo: #endif #ifdef CONFIG_IPV6_NDISC_NODETYPE /* skip link-specific ndopts from interior routers */ if (skb->ndisc_nodetype == NDISC_NODETYPE_NODEFAULT) { ND_PRINTK(2, info, "RA: %s, nodetype is NODEFAULT (interior routes), dev: %s\n", __func__, skb->dev->name); goto out; } #endif if (in6_dev->cnf.accept_ra_pinfo && ndopts.nd_opts_pi) { struct nd_opt_hdr *p; for (p = ndopts.nd_opts_pi; p; p = ndisc_next_option(p, ndopts.nd_opts_pi_end)) { addrconf_prefix_rcv(skb->dev, (u8 *)p, (p->nd_opt_len) << 3, ndopts.nd_opts_src_lladdr != NULL); } } if (ndopts.nd_opts_mtu && in6_dev->cnf.accept_ra_mtu) { __be32 n; u32 mtu; memcpy(&n, ((u8 *)(ndopts.nd_opts_mtu+1))+2, sizeof(mtu)); mtu = ntohl(n); if (mtu < IPV6_MIN_MTU || mtu > skb->dev->mtu) { ND_PRINTK(2, warn, "RA: invalid mtu: %d\n", mtu); } else if (in6_dev->cnf.mtu6 != mtu) { in6_dev->cnf.mtu6 = mtu; if (rt) dst_metric_set(&rt->dst, RTAX_MTU, mtu); rt6_mtu_change(skb->dev, mtu); } } if (ndopts.nd_useropts) { struct nd_opt_hdr *p; for (p = ndopts.nd_useropts; p; p = ndisc_next_useropt(skb->dev, p, ndopts.nd_useropts_end)) { ndisc_ra_useropt(skb, p); } } if (ndopts.nd_opts_tgt_lladdr || ndopts.nd_opts_rh) { ND_PRINTK(2, warn, "RA: invalid RA options\n"); } out: ip6_rt_put(rt); if (neigh) neigh_release(neigh); }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明80447.24%2130.00%
Ben Greear17910.52%22.86%
Linus Torvalds (pre-git)1649.64%811.43%
Joe Perches714.17%11.43%
David S. Miller593.47%57.14%
Andreas Hofmeister543.17%11.43%
Krishna Kumar422.47%11.43%
Marius Tomaschewski412.41%22.86%
Fred L. Templin402.35%11.43%
Pierre Ynard372.17%11.43%
Jiri Pirko231.35%11.43%
Hangbin Liu231.35%11.43%
Shirley Ma201.18%11.43%
Arnaldo Carvalho de Melo181.06%22.86%
Alexander Aring181.06%11.43%
Duan Jiong160.94%11.43%
David Ward140.82%11.43%
D.S. Ljungmark130.76%11.43%
Linus Torvalds80.47%34.29%
Neil Horman60.35%11.43%
Thomas Graf60.35%11.43%
Hannes Frederic Sowa60.35%11.43%
Harout Hedeshian60.35%11.43%
Simon Horman60.35%11.43%
Al Viro50.29%11.43%
Gao Feng40.24%11.43%
Roland Dreier40.24%11.43%
Ian Morris40.24%11.43%
Américo Wang30.18%11.43%
Harvey Harrison20.12%11.43%
Shmulik Ladkani20.12%11.43%
Li RongQing20.12%11.43%
Eric Dumazet10.06%11.43%
Pedro Ribeiro10.06%11.43%
Total1702100.00%70100.00%


static void ndisc_redirect_rcv(struct sk_buff *skb) { u8 *hdr; struct ndisc_options ndopts; struct rd_msg *msg = (struct rd_msg *)skb_transport_header(skb); u32 ndoptlen = skb_tail_pointer(skb) - (skb_transport_header(skb) + offsetof(struct rd_msg, opt)); #ifdef CONFIG_IPV6_NDISC_NODETYPE switch (skb->ndisc_nodetype) { case NDISC_NODETYPE_HOST: case NDISC_NODETYPE_NODEFAULT: ND_PRINTK(2, warn, "Redirect: from host or unauthorized router\n"); return; } #endif if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL)) { ND_PRINTK(2, warn, "Redirect: source address is not link-local\n"); return; } if (!ndisc_parse_options(skb->dev, msg->opt, ndoptlen, &ndopts)) return; if (!ndopts.nd_opts_rh) { ip6_redirect_no_header(skb, dev_net(skb->dev), skb->dev->ifindex, 0); return; } hdr = (u8 *)ndopts.nd_opts_rh; hdr += 8; if (!pskb_pull(skb, hdr - skb_transport_header(skb))) return; icmpv6_notify(skb, NDISC_REDIRECT, 0, 0); }

Contributors

PersonTokensPropCommitsCommitProp
Duan Jiong11656.04%323.08%
Hideaki Yoshifuji / 吉藤英明3416.43%323.08%
Fred L. Templin188.70%17.69%
Joe Perches125.80%17.69%
David S. Miller73.38%17.69%
Linus Torvalds62.90%17.69%
Simon Horman62.90%17.69%
Alexander Aring41.93%17.69%
Arnaldo Carvalho de Melo41.93%17.69%
Total207100.00%13100.00%


static void ndisc_fill_redirect_hdr_option(struct sk_buff *skb, struct sk_buff *orig_skb, int rd_len) { u8 *opt = skb_put(skb, rd_len); memset(opt, 0, 8); *(opt++) = ND_OPT_REDIRECT_HDR; *(opt++) = (rd_len >> 3); opt += 6; memcpy(opt, ipv6_hdr(orig_skb), rd_len - 8); }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明77100.00%2100.00%
Total77100.00%2100.00%


void ndisc_send_redirect(struct sk_buff *skb, const struct in6_addr *target) { struct net_device *dev = skb->dev; struct net *net = dev_net(dev); struct sock *sk = net->ipv6.ndisc_sk; int optlen = 0; struct inet_peer *peer; struct sk_buff *buff; struct rd_msg *msg; struct in6_addr saddr_buf; struct rt6_info *rt; struct dst_entry *dst; struct flowi6 fl6; int rd_len; u8 ha_buf[MAX_ADDR_LEN], *ha = NULL, ops_data_buf[NDISC_OPS_REDIRECT_DATA_SPACE], *ops_data = NULL; bool ret; if (ipv6_get_lladdr(dev, &saddr_buf, IFA_F_TENTATIVE)) { ND_PRINTK(2, warn, "Redirect: no link-local address on %s\n", dev->name); return; } if (!ipv6_addr_equal(&ipv6_hdr(skb)->daddr, target) && ipv6_addr_type(target) != (IPV6_ADDR_UNICAST|IPV6_ADDR_LINKLOCAL)) { ND_PRINTK(2, warn, "Redirect: target address is not link-local unicast\n"); return; } icmpv6_flow_init(sk, &fl6, NDISC_REDIRECT, &saddr_buf, &ipv6_hdr(skb)->saddr, dev->ifindex); dst = ip6_route_output(net, NULL, &fl6); if (dst->error) { dst_release(dst); return; } dst = xfrm_lookup(net, dst, flowi6_to_flowi(&fl6), NULL, 0); if (IS_ERR(dst)) return; rt = (struct rt6_info *) dst; if (rt->rt6i_flags & RTF_GATEWAY) { ND_PRINTK(2, warn, "Redirect: destination is not a neighbour\n"); goto release; } peer = inet_getpeer_v6(net->ipv6.peers, &ipv6_hdr(skb)->saddr, 1); ret = inet_peer_xrlim_allow(peer, 1*HZ); if (peer) inet_putpeer(peer); if (!ret) goto release; if (dev->addr_len) { struct neighbour *neigh = dst_neigh_lookup(skb_dst(skb), target); if (!neigh) { ND_PRINTK(2, warn, "Redirect: no neigh for target address\n"); goto release; } read_lock_bh(&neigh->lock); if (neigh->nud_state & NUD_VALID) { memcpy(ha_buf, neigh->ha, dev->addr_len); read_unlock_bh(&neigh->lock); ha = ha_buf; optlen += ndisc_redirect_opt_addr_space(dev, neigh, ops_data_buf, &ops_data); } else read_unlock_bh(&neigh->lock); neigh_release(neigh); } rd_len = min_t(unsigned int, IPV6_MIN_MTU - sizeof(struct ipv6hdr) - sizeof(*msg) - optlen, skb->len + 8); rd_len &= ~0x7; optlen += rd_len; buff = ndisc_alloc_skb(dev, sizeof(*msg) + optlen); if (!buff) goto release; msg = (struct rd_msg *)skb_put(buff, sizeof(*msg)); *msg = (struct rd_msg) { .icmph = { .icmp6_type = NDISC_REDIRECT, }, .target = *target, .dest = ipv6_hdr(skb)->daddr, }; /* * include target_address option */ if (ha) ndisc_fill_redirect_addr_option(buff, ha, ops_data); /* * build redirect option and copy skb over to the new packet. */ if (rd_len) ndisc_fill_redirect_hdr_option(buff, skb, rd_len); skb_dst_set(buff, dst); ndisc_send_skb(buff, &ipv6_hdr(skb)->saddr, &saddr_buf); return; release: dst_release(dst); }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明25842.64%1732.69%
David S. Miller10216.86%815.38%
Kazunori Miyazawa548.93%11.92%
Linus Torvalds (pre-git)345.62%59.62%
Li Yewang264.30%11.92%
Joe Perches243.97%11.92%
Daniel Lezcano223.64%23.85%
Alexander Aring213.47%11.92%
Ilpo Järvinen162.64%11.92%
Arnaldo Carvalho de Melo101.65%23.85%
Li RongQing91.49%11.92%
Martin KaFai Lau50.83%11.92%
Alexey Dobriyan50.83%23.85%
Brian Haley40.66%11.92%
Eric Dumazet40.66%11.92%
Alexey Kuznetsov30.50%11.92%
Randy Dunlap20.33%11.92%
Neil Horman20.33%11.92%
David Ahern10.17%11.92%
Matthias Schiffer10.17%11.92%
Linus Torvalds10.17%11.92%
jlut@cs.hut.fi10.17%11.92%
Total605100.00%52100.00%


static void pndisc_redo(struct sk_buff *skb) { ndisc_recv_ns(skb); kfree_skb(skb); }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明21100.00%3100.00%
Total21100.00%3100.00%


static bool ndisc_suppress_frag_ndisc(struct sk_buff *skb) { struct inet6_dev *idev = __in6_dev_get(skb->dev); if (!idev) return true; if (IP6CB(skb)->flags & IP6SKB_FRAGMENTED && idev->cnf.suppress_frag_ndisc) { net_warn_ratelimited("Received fragmented ndisc packet. Carefully consider disabling suppress_frag_ndisc.\n"); return true; } return false; }

Contributors

PersonTokensPropCommitsCommitProp
Hannes Frederic Sowa61100.00%1100.00%
Total61100.00%1100.00%


int ndisc_rcv(struct sk_buff *skb) { struct nd_msg *msg; if (ndisc_suppress_frag_ndisc(skb)) return 0; if (skb_linearize(skb)) return 0; msg = (struct nd_msg *)skb_transport_header(skb); __skb_push(skb, skb->data - skb_transport_header(skb)); if (ipv6_hdr(skb)->hop_limit != 255) { ND_PRINTK(2, warn, "NDISC: invalid hop-limit: %d\n", ipv6_hdr(skb)->hop_limit); return 0; } if (msg->icmph.icmp6_code != 0) { ND_PRINTK(2, warn, "NDISC: invalid ICMPv6 code: %d\n", msg->icmph.icmp6_code); return 0; } memset(NEIGH_CB(skb), 0, sizeof(struct neighbour_cb)); switch (msg->icmph.icmp6_type) { case NDISC_NEIGHBOUR_SOLICITATION: ndisc_recv_ns(skb); break; case NDISC_NEIGHBOUR_ADVERTISEMENT: ndisc_recv_na(skb); break; case NDISC_ROUTER_SOLICITATION: ndisc_recv_rs(skb); break; case NDISC_ROUTER_ADVERTISEMENT: ndisc_router_discovery(skb); break; case NDISC_REDIRECT: ndisc_redirect_rcv(skb); break; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明7739.09%531.25%
Linus Torvalds (pre-git)5728.93%531.25%
Patrick McHardy168.12%16.25%
David S. Miller136.60%16.25%
Joe Perches126.09%16.25%
Arnaldo Carvalho de Melo126.09%212.50%
Hannes Frederic Sowa105.08%16.25%
Total197100.00%16100.00%


static int ndisc_netdev_event(struct notifier_block *this, unsigned long event, void *ptr) { struct net_device *dev = netdev_notifier_info_to_dev(ptr); struct netdev_notifier_change_info *change_info; struct net *net = dev_net(dev); struct inet6_dev *idev; switch (event) { case NETDEV_CHANGEADDR: neigh_changeaddr(&nd_tbl, dev); fib6_run_gc(0, net, false); idev = in6_dev_get(dev); if (!idev) break; if (idev->cnf.ndisc_notify || net->ipv6.devconf_all->ndisc_notify) ndisc_send_unsol_na(dev); in6_dev_put(idev); break; case NETDEV_CHANGE: change_info = ptr; if (change_info->flags_changed & IFF_NOARP) neigh_changeaddr(&nd_tbl, dev); break; case NETDEV_DOWN: neigh_ifdown(&nd_tbl, dev); fib6_run_gc(0, net, false); break; case NETDEV_NOTIFY_PEERS: ndisc_send_unsol_na(dev); break; default: break; } return NOTIFY_DONE; }

Contributors

PersonTokensPropCommitsCommitProp
Tommi Virtanen5330.46%110.00%
Hannes Frederic Sowa3620.69%110.00%
Eric Dumazet2916.67%110.00%
David S. Miller169.20%110.00%
Daniel Lezcano116.32%110.00%
Ben Hutchings95.17%110.00%
David Ahern84.60%110.00%
Michal Kubeček63.45%110.00%
Jiri Pirko31.72%110.00%
Hideaki Yoshifuji / 吉藤英明31.72%110.00%
Total174100.00%10100.00%

static struct notifier_block ndisc_netdev_notifier = { .notifier_call = ndisc_netdev_event, }; #ifdef CONFIG_SYSCTL
static void ndisc_warn_deprecated_sysctl(struct ctl_table *ctl, const char *func, const char *dev_name) { static char warncomm[TASK_COMM_LEN]; static int warned; if (strcmp(warncomm, current->comm) && warned < 5) { strcpy(warncomm, current->comm); pr_warn("process `%s' is using deprecated sysctl (%s) net.ipv6.neigh.%s.%s - use net.ipv6.neigh.%s.%s_ms instead\n", warncomm, func, dev_name, ctl->procname, dev_name, ctl->procname); warned++; } }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明8097.56%150.00%
Joe Perches22.44%150.00%
Total82100.00%2100.00%


int ndisc_ifinfo_sysctl_change(struct ctl_table *ctl, int write, void __user *buffer, size_t *lenp, loff_t *ppos) { struct net_device *dev = ctl->extra1; struct inet6_dev *idev; int ret; if ((strcmp(ctl->procname, "retrans_time") == 0) || (strcmp(ctl->procname, "base_reachable_time") == 0)) ndisc_warn_deprecated_sysctl(ctl, "syscall", dev ? dev->name : "default"); if (strcmp(ctl->procname, "retrans_time") == 0) ret = neigh_proc_dointvec(ctl, write, buffer, lenp, ppos); else if (strcmp(ctl->procname, "base_reachable_time") == 0) ret = neigh_proc_dointvec_jiffies(ctl, write, buffer, lenp, ppos); else if ((strcmp(ctl->procname, "retrans_time_ms") == 0) || (strcmp(ctl->procname, "base_reachable_time_ms") == 0)) ret = neigh_proc_dointvec_ms_jiffies(ctl, write, buffer, lenp, ppos); else ret = -1; if (write && ret == 0 && dev && (idev = in6_dev_get(dev)) != NULL) { if (ctl->data == &NEIGH_VAR(idev->nd_parms, BASE_REACHABLE_TIME)) idev->nd_parms->reachable_time = neigh_rand_reach_time(NEIGH_VAR(idev->nd_parms, BASE_REACHABLE_TIME)); idev->tstamp = jiffies; inet6_ifinfo_notify(RTM_NEWLINK, idev); in6_dev_put(idev); } return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明10538.75%654.55%
Shirley Ma7527.68%19.09%
Eric W. Biedermann7427.31%19.09%
Jiri Pirko134.80%218.18%
Linus Torvalds41.48%19.09%
Total271100.00%11100.00%

#endif
static int __net_init ndisc_net_init(struct net *net) { struct ipv6_pinfo *np; struct sock *sk; int err; err = inet_ctl_sock_create(&sk, PF_INET6, SOCK_RAW, IPPROTO_ICMPV6, net); if (err < 0) { ND_PRINTK(0, err, "NDISC: Failed to initialize the control socket (err %d)\n", err); return err; } net->ipv6.ndisc_sk = sk; np = inet6_sk(sk); np->hop_limit = 255; /* Do not loopback ndisc messages */ np->mc_loop = 0; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)4446.81%545.45%
Daniel Lezcano1718.09%19.09%
David S. Miller1414.89%19.09%
Al Viro77.45%19.09%
Joe Perches66.38%19.09%
Denis V. Lunev55.32%19.09%
Alexey Dobriyan11.06%19.09%
Total94100.00%11100.00%


static void __net_exit ndisc_net_exit(struct net *net) { inet_ctl_sock_destroy(net->ipv6.ndisc_sk); }

Contributors

PersonTokensPropCommitsCommitProp
Daniel Lezcano1990.48%133.33%
Denis V. Lunev14.76%133.33%
Alexey Dobriyan14.76%133.33%
Total21100.00%3100.00%

static struct pernet_operations ndisc_net_ops = { .init = ndisc_net_init, .exit = ndisc_net_exit, };
int __init ndisc_init(void) { int err; err = register_pernet_subsys(&ndisc_net_ops); if (err) return err; /* * Initialize the neighbour table */ neigh_table_init(NEIGH_ND_TABLE, &nd_tbl); #ifdef CONFIG_SYSCTL err = neigh_sysctl_register(NULL, &nd_tbl.parms, ndisc_ifinfo_sysctl_change); if (err) goto out_unregister_pernet; out: #endif return err; #ifdef CONFIG_SYSCTL out_unregister_pernet: unregister_pernet_subsys(&ndisc_net_ops); goto out; #endif }

Contributors

PersonTokensPropCommitsCommitProp
Daniel Lezcano5162.20%110.00%
Linus Torvalds (pre-git)2328.05%440.00%
Fabio Estevam22.44%110.00%
Michal Kubeček22.44%110.00%
Américo Wang22.44%110.00%
Hideaki Yoshifuji / 吉藤英明11.22%110.00%
Shirley Ma11.22%110.00%
Total82100.00%10100.00%


int __init ndisc_late_init(void) { return register_netdevice_notifier(&ndisc_netdev_notifier); }

Contributors

PersonTokensPropCommitsCommitProp
Michal Kubeček1493.33%150.00%
Linus Torvalds (pre-git)16.67%150.00%
Total15100.00%2100.00%


void ndisc_late_cleanup(void) { unregister_netdevice_notifier(&ndisc_netdev_notifier); }

Contributors

PersonTokensPropCommitsCommitProp
Dmitry Mishin646.15%133.33%
Linus Torvalds (pre-git)430.77%133.33%
Michal Kubeček323.08%133.33%
Total13100.00%3100.00%


void ndisc_cleanup(void) { #ifdef CONFIG_SYSCTL neigh_sysctl_unregister(&nd_tbl.parms); #endif neigh_table_clear(NEIGH_ND_TABLE, &nd_tbl); unregister_pernet_subsys(&ndisc_net_ops); }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明1338.24%114.29%
Linus Torvalds (pre-git)1029.41%342.86%
Michal Kubeček617.65%114.29%
Daniel Lezcano38.82%114.29%
Américo Wang25.88%114.29%
Total34100.00%7100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明365739.63%8330.18%
Linus Torvalds (pre-git)156016.91%217.64%
Pierre Ynard4264.62%20.73%
Alexander Aring3143.40%31.09%
David S. Miller2913.15%269.45%
Joe Perches2262.45%31.09%
Ben Greear1791.94%20.73%
Daniel Lezcano1731.87%72.55%
Erik Nordmark1511.64%10.36%
Duan Jiong1371.48%51.82%
Eric W. Biedermann1341.45%62.18%
Hannes Frederic Sowa1131.22%31.09%
Shirley Ma1041.13%20.73%
Ben Hutchings1041.13%10.36%
Jiri Pirko1001.08%31.09%
Arnaldo Carvalho de Melo951.03%51.82%
Brian Haley931.01%31.09%
David L Stevens800.87%20.73%
David Ahern790.86%41.45%
Kazunori Miyazawa690.75%10.36%
Rusty Russell660.72%10.36%
Tommi Virtanen640.69%10.36%
Ville Nuorvala600.65%31.09%
Eric Dumazet590.64%72.55%
Fred L. Templin580.63%10.36%
Pavel Emelyanov580.63%10.36%
Andreas Hofmeister540.59%10.36%
Roland Dreier490.53%20.73%
Linus Torvalds470.51%51.82%
Neil Horman450.49%31.09%
Krishna Kumar420.46%10.36%
Marius Tomaschewski410.44%20.73%
Herbert Xu320.35%10.36%
Michal Kubeček310.34%20.73%
Johannes Berg290.31%10.36%
jlut@cs.hut.fi260.28%10.36%
Li Yewang260.28%10.36%
Patrick McHardy250.27%20.73%
Simon Horman240.26%10.36%
Hangbin Liu230.25%10.36%
Stephen Hemminger220.24%62.18%
Thomas Graf200.22%31.09%
Ian Morris200.22%20.73%
Randy Dunlap180.20%10.36%
Denis V. Lunev180.20%62.18%
Ilpo Järvinen160.17%10.36%
Timo Teräs150.16%10.36%
David Ward140.15%10.36%
D.S. Ljungmark130.14%10.36%
Al Viro120.13%20.73%
Li RongQing110.12%20.73%
Alexey Kuznetsov100.11%10.36%
Jan Sembera90.10%10.36%
Daniel Walter80.09%10.36%
Alexey I. Froloff70.08%10.36%
Alexey Dobriyan70.08%31.09%
Américo Wang70.08%20.73%
Harout Hedeshian60.07%10.36%
Dmitry Mishin60.07%10.36%
Jens Rosenboom50.05%10.36%
Erik Kline50.05%10.36%
Martin KaFai Lau50.05%10.36%
Harvey Harrison50.05%10.36%
Gao Feng40.04%10.36%
Rolf Manderscheid40.04%10.36%
Tejun Heo30.03%10.36%
Fabio Estevam20.02%10.36%
Shan Wei20.02%10.36%
Shmulik Ladkani20.02%10.36%
Daniel Baluta20.02%10.36%
Nicolas Dichtel10.01%10.36%
Pedro Ribeiro10.01%10.36%
Jan Engelhardt10.01%10.36%
Jiri Benc10.01%10.36%
Andi Kleen10.01%10.36%
Matthias Schiffer10.01%10.36%
Total9228100.00%275100.00%
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