Alexander Aring wrote:
> This patch introduces neighbour discovery ops callback structure. The
> idea is to separate the handling for 6LoWPAN into the 6lowpan module.
>
> These callback offers 6lowpan different handling, such as 802.15.4 short
> address handling or RFC6775 (Neighbor Discovery Optimization for IPv6
> over 6LoWPANs).
>
> Cc: David S. Miller <davem@xxxxxxxxxxxxx>
> Cc: Alexey Kuznetsov <kuznet@xxxxxxxxxxxxx>
> Cc: James Morris <jmorris@xxxxxxxxx>
> Cc: Hideaki YOSHIFUJI <yoshfuji@xxxxxxxxxxxxxx>
> Cc: Patrick McHardy <kaber@xxxxxxxxx>
> Signed-off-by: Alexander Aring <aar@xxxxxxxxxxxxxx>
Acked-by: YOSHIFUJI Hideaki <yoshfuji@xxxxxxxxxxxxxx>
> ---
> include/linux/netdevice.h | 5 ++
> include/net/ndisc.h | 197 +++++++++++++++++++++++++++++++++++++++++++++-
> net/ipv6/addrconf.c | 13 ++-
> net/ipv6/ndisc.c | 101 ++++++++++++++++--------
> net/ipv6/route.c | 8 +-
> 5 files changed, 284 insertions(+), 40 deletions(-)
>
> diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
> index 36e43bd..890158e 100644
> --- a/include/linux/netdevice.h
> +++ b/include/linux/netdevice.h
> @@ -1456,6 +1456,8 @@ enum netdev_priv_flags {
> * @netdev_ops: Includes several pointers to callbacks,
> * if one wants to override the ndo_*() functions
> * @ethtool_ops: Management operations
> + * @ndisc_ops: Includes callbacks for different IPv6 neighbour
> + * discovery handling. Necessary for e.g. 6LoWPAN.
> * @header_ops: Includes callbacks for creating,parsing,caching,etc
> * of Layer 2 headers.
> *
> @@ -1672,6 +1674,9 @@ struct net_device {
> #ifdef CONFIG_NET_L3_MASTER_DEV
> const struct l3mdev_ops *l3mdev_ops;
> #endif
> +#if IS_ENABLED(CONFIG_IPV6)
> + const struct ndisc_ops *ndisc_ops;
> +#endif
>
> const struct header_ops *header_ops;
>
> diff --git a/include/net/ndisc.h b/include/net/ndisc.h
> index c8962ad..a5e2767 100644
> --- a/include/net/ndisc.h
> +++ b/include/net/ndisc.h
> @@ -58,6 +58,7 @@ struct inet6_dev;
> struct net_device;
> struct net_proto_family;
> struct sk_buff;
> +struct prefix_info;
>
> extern struct neigh_table nd_tbl;
>
> @@ -110,9 +111,182 @@ struct ndisc_options {
>
> #define NDISC_OPT_SPACE(len) (((len)+2+7)&~7)
>
> -struct ndisc_options *ndisc_parse_options(u8 *opt, int opt_len,
> +struct ndisc_options *ndisc_parse_options(const struct net_device *dev,
> + u8 *opt, int opt_len,
> struct ndisc_options *ndopts);
>
> +#define NDISC_OPS_REDIRECT_DATA_SPACE 2
> +
> +/*
> + * This structure defines the hooks for IPv6 neighbour discovery.
> + * The following hooks can be defined; unless noted otherwise, they are
> + * optional and can be filled with a null pointer.
> + *
> + * int (*is_useropt)(u8 nd_opt_type):
> + * This function is called when IPv6 decide RA userspace options. if
> + * this function returns 1 then the option given by nd_opt_type will
> + * be handled as userspace option additional to the IPv6 options.
> + *
> + * int (*parse_options)(const struct net_device *dev,
> + * struct nd_opt_hdr *nd_opt,
> + * struct ndisc_options *ndopts):
> + * This function is called while parsing ndisc ops and put each position
> + * as pointer into ndopts. If this function return unequal 0, then this
> + * function took care about the ndisc option, if 0 then the IPv6 ndisc
> + * option parser will take care about that option.
> + *
> + * void (*update)(const struct net_device *dev, struct neighbour *n,
> + * u32 flags, u8 icmp6_type,
> + * const struct ndisc_options *ndopts):
> + * This function is called when IPv6 ndisc updates the neighbour cache
> + * entry. Additional options which can be updated may be previously
> + * parsed by parse_opts callback and accessible over ndopts parameter.
> + *
> + * int (*opt_addr_space)(const struct net_device *dev, u8 icmp6_type,
> + * struct neighbour *neigh, u8 *ha_buf,
> + * u8 **ha):
> + * This function is called when the necessary option space will be
> + * calculated before allocating a skb. The parameters neigh, ha_buf
> + * abd ha are available on NDISC_REDIRECT messages only.
> + *
> + * void (*fill_addr_option)(const struct net_device *dev,
> + * struct sk_buff *skb, u8 icmp6_type,
> + * const u8 *ha):
> + * This function is called when the skb will finally fill the option
> + * fields inside skb. NOTE: this callback should fill the option
> + * fields to the skb which are previously indicated by opt_space
> + * parameter. That means the decision to add such option should
> + * not lost between these two callbacks, e.g. protected by interface
> + * up state.
> + *
> + * void (*prefix_rcv_add_addr)(struct net *net, struct net_device *dev,
> + * const struct prefix_info *pinfo,
> + * struct inet6_dev *in6_dev,
> + * struct in6_addr *addr,
> + * int addr_type, u32 addr_flags,
> + * bool sllao, bool tokenized,
> + * __u32 valid_lft, u32 prefered_lft,
> + * bool dev_addr_generated):
> + * This function is called when a RA messages is received with valid
> + * PIO option fields and an IPv6 address will be added to the interface
> + * for autoconfiguration. The parameter dev_addr_generated reports about
> + * if the address was based on dev->dev_addr or not. This can be used
> + * to add a second address if link-layer operates with two link layer
> + * addresses. E.g. 802.15.4 6LoWPAN.
> + */
> +struct ndisc_ops {
> + int (*is_useropt)(u8 nd_opt_type);
> + int (*parse_options)(const struct net_device *dev,
> + struct nd_opt_hdr *nd_opt,
> + struct ndisc_options *ndopts);
> + void (*update)(const struct net_device *dev, struct neighbour *n,
> + u32 flags, u8 icmp6_type,
> + const struct ndisc_options *ndopts);
> + int (*opt_addr_space)(const struct net_device *dev, u8 icmp6_type,
> + struct neighbour *neigh, u8 *ha_buf,
> + u8 **ha);
> + void (*fill_addr_option)(const struct net_device *dev,
> + struct sk_buff *skb, u8 icmp6_type,
> + const u8 *ha);
> + void (*prefix_rcv_add_addr)(struct net *net, struct net_device *dev,
> + const struct prefix_info *pinfo,
> + struct inet6_dev *in6_dev,
> + struct in6_addr *addr,
> + int addr_type, u32 addr_flags,
> + bool sllao, bool tokenized,
> + __u32 valid_lft, u32 prefered_lft,
> + bool dev_addr_generated);
> +};
> +
> +#if IS_ENABLED(CONFIG_IPV6)
> +static inline int ndisc_ops_is_useropt(const struct net_device *dev,
> + u8 nd_opt_type)
> +{
> + if (dev->ndisc_ops && dev->ndisc_ops->is_useropt)
> + return dev->ndisc_ops->is_useropt(nd_opt_type);
> + else
> + return 0;
> +}
> +
> +static inline int ndisc_ops_parse_options(const struct net_device *dev,
> + struct nd_opt_hdr *nd_opt,
> + struct ndisc_options *ndopts)
> +{
> + if (dev->ndisc_ops && dev->ndisc_ops->parse_options)
> + return dev->ndisc_ops->parse_options(dev, nd_opt, ndopts);
> + else
> + return 0;
> +}
> +
> +static inline void ndisc_ops_update(const struct net_device *dev,
> + struct neighbour *n, u32 flags,
> + u8 icmp6_type,
> + const struct ndisc_options *ndopts)
> +{
> + if (dev->ndisc_ops && dev->ndisc_ops->update)
> + dev->ndisc_ops->update(dev, n, flags, icmp6_type, ndopts);
> +}
> +
> +static inline int ndisc_ops_opt_addr_space(const struct net_device *dev,
> + u8 icmp6_type)
> +{
> + if (dev->ndisc_ops && dev->ndisc_ops->opt_addr_space &&
> + icmp6_type != NDISC_REDIRECT)
> + return dev->ndisc_ops->opt_addr_space(dev, icmp6_type, NULL,
> + NULL, NULL);
> + else
> + return 0;
> +}
> +
> +static inline int ndisc_ops_redirect_opt_addr_space(const struct net_device *dev,
> + struct neighbour *neigh,
> + u8 *ha_buf, u8 **ha)
> +{
> + if (dev->ndisc_ops && dev->ndisc_ops->opt_addr_space)
> + return dev->ndisc_ops->opt_addr_space(dev, NDISC_REDIRECT,
> + neigh, ha_buf, ha);
> + else
> + return 0;
> +}
> +
> +static inline void ndisc_ops_fill_addr_option(const struct net_device *dev,
> + struct sk_buff *skb,
> + u8 icmp6_type)
> +{
> + if (dev->ndisc_ops && dev->ndisc_ops->fill_addr_option &&
> + icmp6_type != NDISC_REDIRECT)
> + dev->ndisc_ops->fill_addr_option(dev, skb, icmp6_type, NULL);
> +}
> +
> +static inline void ndisc_ops_fill_redirect_addr_option(const struct net_device *dev,
> + struct sk_buff *skb,
> + const u8 *ha)
> +{
> + if (dev->ndisc_ops && dev->ndisc_ops->fill_addr_option)
> + dev->ndisc_ops->fill_addr_option(dev, skb, NDISC_REDIRECT, ha);
> +}
> +
> +static inline void ndisc_ops_prefix_rcv_add_addr(struct net *net,
> + struct net_device *dev,
> + const struct prefix_info *pinfo,
> + struct inet6_dev *in6_dev,
> + struct in6_addr *addr,
> + int addr_type, u32 addr_flags,
> + bool sllao, bool tokenized,
> + __u32 valid_lft,
> + u32 prefered_lft,
> + bool dev_addr_generated)
> +{
> + if (dev->ndisc_ops && dev->ndisc_ops->prefix_rcv_add_addr)
> + dev->ndisc_ops->prefix_rcv_add_addr(net, dev, pinfo, in6_dev,
> + addr, addr_type,
> + addr_flags, sllao,
> + tokenized, valid_lft,
> + prefered_lft,
> + dev_addr_generated);
> +}
> +#endif
> +
> /*
> * Return the padding between the option length and the start of the
> * link addr. Currently only IP-over-InfiniBand needs this, although
> @@ -132,11 +306,25 @@ static inline int __ndisc_opt_addr_space(unsigned char addr_len, int pad)
> return NDISC_OPT_SPACE(addr_len + pad);
> }
>
> -static inline int ndisc_opt_addr_space(struct net_device *dev)
> +#if IS_ENABLED(CONFIG_IPV6)
> +static inline int ndisc_opt_addr_space(struct net_device *dev, u8 icmp6_type)
> +{
> + return __ndisc_opt_addr_space(dev->addr_len,
> + ndisc_addr_option_pad(dev->type)) +
> + ndisc_ops_opt_addr_space(dev, icmp6_type);
> +}
> +
> +static inline int ndisc_redirect_opt_addr_space(struct net_device *dev,
> + struct neighbour *neigh,
> + u8 *ops_data_buf,
> + u8 **ops_data)
> {
> return __ndisc_opt_addr_space(dev->addr_len,
> - ndisc_addr_option_pad(dev->type));
> + ndisc_addr_option_pad(dev->type)) +
> + ndisc_ops_redirect_opt_addr_space(dev, neigh, ops_data_buf,
> + ops_data);
> }
> +#endif
>
> static inline u8 *__ndisc_opt_addr_data(struct nd_opt_hdr *p,
> unsigned char addr_len, int prepad)
> @@ -205,6 +393,9 @@ void ndisc_send_redirect(struct sk_buff *skb, const struct in6_addr *target);
> int ndisc_mc_map(const struct in6_addr *addr, char *buf, struct net_device *dev,
> int dir);
>
> +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);
>
> /*
> * IGMP
> diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
> index 0ca31e1..2d678c0 100644
> --- a/net/ipv6/addrconf.c
> +++ b/net/ipv6/addrconf.c
> @@ -2531,7 +2531,7 @@ void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao)
>
> if (pinfo->autoconf && in6_dev->cnf.autoconf) {
> struct in6_addr addr;
> - bool tokenized = false;
> + bool tokenized = false, dev_addr_generated = false;
>
> if (pinfo->prefix_len == 64) {
> memcpy(&addr, &pinfo->prefix, 8);
> @@ -2550,6 +2550,8 @@ void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao)
> } else if (ipv6_generate_eui64(addr.s6_addr + 8, dev) &&
> ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) {
> goto put;
> + } else {
> + dev_addr_generated = true;
> }
> goto ok;
> }
> @@ -2565,6 +2567,15 @@ ok:
> prefered_lft);
> if (err)
> goto put;
> +
> + /* Ignore error case here because previous prefix add addr was
> + * successful which will be notified.
> + */
> + ndisc_ops_prefix_rcv_add_addr(net, dev, pinfo, in6_dev, &addr,
> + addr_type, addr_flags, sllao,
> + tokenized, valid_lft,
> + prefered_lft,
> + dev_addr_generated);
> }
> inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo);
> put:
> diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
> index a7b9468..2f4afd1 100644
> --- a/net/ipv6/ndisc.c
> +++ b/net/ipv6/ndisc.c
> @@ -172,10 +172,19 @@ static void __ndisc_fill_addr_option(struct sk_buff *skb, int type, void *data,
> }
>
> static inline void ndisc_fill_addr_option(struct sk_buff *skb, int type,
> - void *data)
> + 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);
> +}
> +
> +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);
> }
>
> static struct nd_opt_hdr *ndisc_next_option(struct nd_opt_hdr *cur,
> @@ -191,24 +200,28 @@ static struct nd_opt_hdr *ndisc_next_option(struct nd_opt_hdr *cur,
> return cur <= end && cur->nd_opt_type == type ? cur : NULL;
> }
>
> -static inline int ndisc_is_useropt(struct nd_opt_hdr *opt)
> +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;
> + opt->nd_opt_type == ND_OPT_DNSSL ||
> + ndisc_ops_is_useropt(dev, opt->nd_opt_type);
> }
>
> -static struct nd_opt_hdr *ndisc_next_useropt(struct nd_opt_hdr *cur,
> +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(cur));
> - return cur <= end && ndisc_is_useropt(cur) ? cur : NULL;
> + } while (cur < end && !ndisc_is_useropt(dev, cur));
> + return cur <= end && ndisc_is_useropt(dev, cur) ? cur : NULL;
> }
>
> -struct ndisc_options *ndisc_parse_options(u8 *opt, int opt_len,
> +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;
> @@ -223,6 +236,8 @@ struct ndisc_options *ndisc_parse_options(u8 *opt, int opt_len,
> 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:
> @@ -249,7 +264,7 @@ struct ndisc_options *ndisc_parse_options(u8 *opt, int opt_len,
> break;
> #endif
> default:
> - if (ndisc_is_useropt(nd_opt)) {
> + if (ndisc_is_useropt(dev, nd_opt)) {
> ndopts->nd_useropts_end = nd_opt;
> if (!ndopts->nd_useropts)
> ndopts->nd_useropts = nd_opt;
> @@ -266,6 +281,7 @@ struct ndisc_options *ndisc_parse_options(u8 *opt, int opt_len,
> nd_opt->nd_opt_len);
> }
> }
> +next_opt:
> opt_len -= l;
> nd_opt = ((void *)nd_opt) + l;
> }
> @@ -515,7 +531,8 @@ void ndisc_send_na(struct net_device *dev, const struct in6_addr *daddr,
> if (!dev->addr_len)
> inc_opt = 0;
> if (inc_opt)
> - optlen += ndisc_opt_addr_space(dev);
> + optlen += ndisc_opt_addr_space(dev,
> + NDISC_NEIGHBOUR_ADVERTISEMENT);
>
> skb = ndisc_alloc_skb(dev, sizeof(*msg) + optlen);
> if (!skb)
> @@ -534,8 +551,8 @@ void ndisc_send_na(struct net_device *dev, const struct in6_addr *daddr,
>
> if (inc_opt)
> ndisc_fill_addr_option(skb, ND_OPT_TARGET_LL_ADDR,
> - dev->dev_addr);
> -
> + dev->dev_addr,
> + NDISC_NEIGHBOUR_ADVERTISEMENT);
>
> ndisc_send_skb(skb, daddr, src_addr);
> }
> @@ -580,7 +597,8 @@ void ndisc_send_ns(struct net_device *dev, const struct in6_addr *solicit,
> if (ipv6_addr_any(saddr))
> inc_opt = false;
> if (inc_opt)
> - optlen += ndisc_opt_addr_space(dev);
> + optlen += ndisc_opt_addr_space(dev,
> + NDISC_NEIGHBOUR_SOLICITATION);
>
> skb = ndisc_alloc_skb(dev, sizeof(*msg) + optlen);
> if (!skb)
> @@ -596,7 +614,8 @@ void ndisc_send_ns(struct net_device *dev, const struct in6_addr *solicit,
>
> if (inc_opt)
> ndisc_fill_addr_option(skb, ND_OPT_SOURCE_LL_ADDR,
> - dev->dev_addr);
> + dev->dev_addr,
> + NDISC_NEIGHBOUR_SOLICITATION);
>
> ndisc_send_skb(skb, daddr, saddr);
> }
> @@ -632,7 +651,7 @@ void ndisc_send_rs(struct net_device *dev, const struct in6_addr *saddr,
> }
> #endif
> if (send_sllao)
> - optlen += ndisc_opt_addr_space(dev);
> + optlen += ndisc_opt_addr_space(dev, NDISC_ROUTER_SOLICITATION);
>
> skb = ndisc_alloc_skb(dev, sizeof(*msg) + optlen);
> if (!skb)
> @@ -647,7 +666,8 @@ void ndisc_send_rs(struct net_device *dev, const struct in6_addr *saddr,
>
> if (send_sllao)
> ndisc_fill_addr_option(skb, ND_OPT_SOURCE_LL_ADDR,
> - dev->dev_addr);
> + dev->dev_addr,
> + NDISC_ROUTER_SOLICITATION);
>
> ndisc_send_skb(skb, daddr, saddr);
> }
> @@ -708,6 +728,15 @@ static int pndisc_is_router(const void *pkey,
> return ret;
> }
>
> +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);
> +}
> +
> static void ndisc_recv_ns(struct sk_buff *skb)
> {
> struct nd_msg *msg = (struct nd_msg *)skb_transport_header(skb);
> @@ -744,7 +773,7 @@ static void ndisc_recv_ns(struct sk_buff *skb)
> return;
> }
>
> - if (!ndisc_parse_options(msg->opt, ndoptlen, &ndopts)) {
> + if (!ndisc_parse_options(dev, msg->opt, ndoptlen, &ndopts)) {
> ND_PRINTK(2, warn, "NS: invalid ND options\n");
> return;
> }
> @@ -862,9 +891,10 @@ have_ifp:
> neigh = __neigh_lookup(&nd_tbl, saddr, dev,
> !inc || lladdr || !dev->addr_len);
> if (neigh)
> - neigh_update(neigh, lladdr, NUD_STALE,
> + ndisc_update(dev, neigh, lladdr, NUD_STALE,
> NEIGH_UPDATE_F_WEAK_OVERRIDE|
> - NEIGH_UPDATE_F_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);
> @@ -917,7 +947,7 @@ static void ndisc_recv_na(struct sk_buff *skb)
> idev->cnf.drop_unsolicited_na)
> return;
>
> - if (!ndisc_parse_options(msg->opt, ndoptlen, &ndopts)) {
> + if (!ndisc_parse_options(dev, msg->opt, ndoptlen, &ndopts)) {
> ND_PRINTK(2, warn, "NS: invalid ND option\n");
> return;
> }
> @@ -973,12 +1003,13 @@ static void ndisc_recv_na(struct sk_buff *skb)
> goto out;
> }
>
> - neigh_update(neigh, lladdr,
> + 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));
> + (msg->icmph.icmp6_router ? NEIGH_UPDATE_F_ISROUTER : 0),
> + NDISC_NEIGHBOUR_ADVERTISEMENT, &ndopts);
>
> if ((old_flags & ~neigh->flags) & NTF_ROUTER) {
> /*
> @@ -1023,7 +1054,7 @@ static void ndisc_recv_rs(struct sk_buff *skb)
> goto out;
>
> /* Parse ND options */
> - if (!ndisc_parse_options(rs_msg->opt, ndoptlen, &ndopts)) {
> + if (!ndisc_parse_options(skb->dev, rs_msg->opt, ndoptlen, &ndopts)) {
> ND_PRINTK(2, notice, "NS: invalid ND option, ignored\n");
> goto out;
> }
> @@ -1037,10 +1068,11 @@ static void ndisc_recv_rs(struct sk_buff *skb)
>
> neigh = __neigh_lookup(&nd_tbl, saddr, skb->dev, 1);
> if (neigh) {
> - neigh_update(neigh, lladdr, NUD_STALE,
> + 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_OVERRIDE_ISROUTER,
> + NDISC_ROUTER_SOLICITATION, &ndopts);
> neigh_release(neigh);
> }
> out:
> @@ -1141,7 +1173,7 @@ static void ndisc_router_discovery(struct sk_buff *skb)
> return;
> }
>
> - if (!ndisc_parse_options(opt, optlen, &ndopts)) {
> + if (!ndisc_parse_options(skb->dev, opt, optlen, &ndopts)) {
> ND_PRINTK(2, warn, "RA: invalid ND options\n");
> return;
> }
> @@ -1335,11 +1367,12 @@ skip_linkparms:
> goto out;
> }
> }
> - neigh_update(neigh, lladdr, NUD_STALE,
> + 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);
> + NEIGH_UPDATE_F_ISROUTER,
> + NDISC_ROUTER_ADVERTISEMENT, &ndopts);
> }
>
> if (!ipv6_accept_ra(in6_dev)) {
> @@ -1427,7 +1460,8 @@ skip_routeinfo:
> struct nd_opt_hdr *p;
> for (p = ndopts.nd_useropts;
> p;
> - p = ndisc_next_useropt(p, ndopts.nd_useropts_end)) {
> + p = ndisc_next_useropt(skb->dev, p,
> + ndopts.nd_useropts_end)) {
> ndisc_ra_useropt(skb, p);
> }
> }
> @@ -1465,7 +1499,7 @@ static void ndisc_redirect_rcv(struct sk_buff *skb)
> return;
> }
>
> - if (!ndisc_parse_options(msg->opt, ndoptlen, &ndopts))
> + if (!ndisc_parse_options(skb->dev, msg->opt, ndoptlen, &ndopts))
> return;
>
> if (!ndopts.nd_opts_rh) {
> @@ -1510,7 +1544,8 @@ void ndisc_send_redirect(struct sk_buff *skb, const struct in6_addr *target)
> struct dst_entry *dst;
> struct flowi6 fl6;
> int rd_len;
> - u8 ha_buf[MAX_ADDR_LEN], *ha = NULL;
> + u8 ha_buf[MAX_ADDR_LEN], *ha = NULL,
> + ops_data_buf[NDISC_OPS_REDIRECT_DATA_SPACE], *ops_data = NULL;
> int oif = l3mdev_fib_oif(dev);
> bool ret;
>
> @@ -1569,7 +1604,9 @@ void ndisc_send_redirect(struct sk_buff *skb, const struct in6_addr *target)
> memcpy(ha_buf, neigh->ha, dev->addr_len);
> read_unlock_bh(&neigh->lock);
> ha = ha_buf;
> - optlen += ndisc_opt_addr_space(dev);
> + optlen += ndisc_redirect_opt_addr_space(dev, neigh,
> + ops_data_buf,
> + &ops_data);
> } else
> read_unlock_bh(&neigh->lock);
>
> @@ -1600,7 +1637,7 @@ void ndisc_send_redirect(struct sk_buff *skb, const struct in6_addr *target)
> */
>
> if (ha)
> - ndisc_fill_addr_option(buff, ND_OPT_TARGET_LL_ADDR, ha);
> + ndisc_fill_redirect_addr_option(buff, ha, ops_data);
>
> /*
> * build redirect option and copy skb over to the new packet.
> diff --git a/net/ipv6/route.c b/net/ipv6/route.c
> index c6ae6f9..af6f711 100644
> --- a/net/ipv6/route.c
> +++ b/net/ipv6/route.c
> @@ -2200,7 +2200,7 @@ static void rt6_do_redirect(struct dst_entry *dst, struct sock *sk, struct sk_bu
> * first-hop router for the specified ICMP Destination Address.
> */
>
> - if (!ndisc_parse_options(msg->opt, optlen, &ndopts)) {
> + if (!ndisc_parse_options(skb->dev, msg->opt, optlen, &ndopts)) {
> net_dbg_ratelimited("rt6_redirect: invalid ND options\n");
> return;
> }
> @@ -2235,12 +2235,12 @@ static void rt6_do_redirect(struct dst_entry *dst, struct sock *sk, struct sk_bu
> * We have finally decided to accept it.
> */
>
> - neigh_update(neigh, lladdr, NUD_STALE,
> + ndisc_update(skb->dev, neigh, lladdr, NUD_STALE,
> NEIGH_UPDATE_F_WEAK_OVERRIDE|
> NEIGH_UPDATE_F_OVERRIDE|
> (on_link ? 0 : (NEIGH_UPDATE_F_OVERRIDE_ISROUTER|
> - NEIGH_UPDATE_F_ISROUTER))
> - );
> + NEIGH_UPDATE_F_ISROUTER)),
> + NDISC_REDIRECT, &ndopts);
>
> nrt = ip6_rt_cache_alloc(rt, &msg->dest, NULL);
> if (!nrt)
>
--
吉藤英明 <hideaki.yoshifuji@xxxxxxxxxxxxxxxx>
ミラクル・リナックス株式会社 技術本部 サポート部
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