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Message-Id: <20181120013114.22020-1-felix.jia@alliedtelesis.co.nz>
Date: Tue, 20 Nov 2018 14:31:13 +1300
From: Felix Jia <felix.jia@...iedtelesis.co.nz>
To: "David S . Miller" <davem@...emloft.net>,
Pablo Neira Ayuso <pablo@...filter.org>
Cc: Blair Steven <blair.steven@...iedtelesis.co.nz>,
netdev@...r.kernel.org, Felix Jia <felix.jia@...iedtelesis.co.nz>,
Sheena Mira-ato <sheena.mira-ato@...iedtelesis.co.nz>,
Masakazu Asama <masakazu.asama@...il.com>
Subject: [PATCH v1 1/2] ip6_tunnel: Adding support of mapping rules for MAP-E tunnel
From: Blair Steven <blair.steven@...iedtelesis.co.nz>
Mapping of Addresses and Ports with Encapsulation (MAP-E) is defined in
RFC7597, and is an IPv6 transition technology providing interoperability
between IPv4 and IPv6 networks.
MAP-E uses the encapsulation mode described in RFC2473 (IPv6 Tunneling)
to transport IPv4 and IPv6 packets over an IPv6 network. It requires a
list rules for mapping between IPv4 prefix/shared addresses and IPv6
addresses.
This patch also support the mapping rules define in the draft3 version of
the RFC.
Co-developed-by: Felix Jia <felix.jia@...iedtelesis.co.nz>
Co-developed-by: Sheena Mira-ato <sheena.mira-ato@...iedtelesis.co.nz>
Co-developed-by: Masakazu Asama <masakazu.asama@...il.com>
Signed-off-by: Blair Steven <blair.steven@...iedtelesis.co.nz>
Signed-off-by: Felix Jia <felix.jia@...iedtelesis.co.nz>
Signed-off-by: Sheena Mira-ato <sheena.mira-ato@...iedtelesis.co.nz>
Signed-off-by: Masakazu Asama <masakazu.asama@...il.com>
---
include/net/ip6_tunnel.h | 18 ++
include/uapi/linux/if_tunnel.h | 18 ++
net/ipv6/ip6_tunnel.c | 491 ++++++++++++++++++++++++++++++++-
3 files changed, 525 insertions(+), 2 deletions(-)
diff --git a/include/net/ip6_tunnel.h b/include/net/ip6_tunnel.h
index 69b4bcf880c9..daa159185228 100644
--- a/include/net/ip6_tunnel.h
+++ b/include/net/ip6_tunnel.h
@@ -18,6 +18,16 @@
/* determine capability on a per-packet basis */
#define IP6_TNL_F_CAP_PER_PACKET 0x40000
+struct ip6_tnl_rule {
+ u8 version;
+ struct in6_addr ipv6_subnet;
+ u8 ipv6_prefixlen;
+ struct in_addr ipv4_subnet;
+ u8 ipv4_prefixlen;
+ u8 ea_length;
+ u8 psid_offset;
+};
+
struct __ip6_tnl_parm {
char name[IFNAMSIZ]; /* name of tunnel device */
int link; /* ifindex of underlying L2 interface */
@@ -40,6 +50,13 @@ struct __ip6_tnl_parm {
__u8 erspan_ver; /* ERSPAN version */
__u8 dir; /* direction */
__u16 hwid; /* hwid */
+ __u8 rule_action;
+ struct ip6_tnl_rule rule;
+};
+
+struct ip6_rule_list {
+ struct list_head list;
+ struct ip6_tnl_rule data;
};
/* IPv6 tunnel */
@@ -63,6 +80,7 @@ struct ip6_tnl {
int encap_hlen; /* Encap header length (FOU,GUE) */
struct ip_tunnel_encap encap;
int mlink;
+ struct ip6_rule_list rules;
};
struct ip6_tnl_encap_ops {
diff --git a/include/uapi/linux/if_tunnel.h b/include/uapi/linux/if_tunnel.h
index 1b3d148c4560..7cb09c8c4d8a 100644
--- a/include/uapi/linux/if_tunnel.h
+++ b/include/uapi/linux/if_tunnel.h
@@ -77,10 +77,28 @@ enum {
IFLA_IPTUN_ENCAP_DPORT,
IFLA_IPTUN_COLLECT_METADATA,
IFLA_IPTUN_FWMARK,
+ IFLA_IPTUN_RULE_VERSION,
+ IFLA_IPTUN_RULE_ACTION,
+ IFLA_IPTUN_RULE_IPV6_PREFIX,
+ IFLA_IPTUN_RULE_IPV6_PREFIXLEN,
+ IFLA_IPTUN_RULE_IPV4_PREFIX,
+ IFLA_IPTUN_RULE_IPV4_PREFIXLEN,
+ IFLA_IPTUN_RULE_EA_LENGTH,
+ IFLA_IPTUN_RULE_PSID_OFFSET,
__IFLA_IPTUN_MAX,
};
#define IFLA_IPTUN_MAX (__IFLA_IPTUN_MAX - 1)
+enum map_rule_versions {
+ MAP_VERSION_RFC,
+ MAP_VERSION_DRAFT3,
+};
+
+enum tunnel_rule_actions {
+ TUNNEL_RULE_ACTION_ADD = 1,
+ TUNNEL_RULE_ACTION_DELETE = 2,
+};
+
enum tunnel_encap_types {
TUNNEL_ENCAP_NONE,
TUNNEL_ENCAP_FOU,
diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c
index a9d06d4dd057..e13dc5bd09b5 100644
--- a/net/ipv6/ip6_tunnel.c
+++ b/net/ipv6/ip6_tunnel.c
@@ -20,6 +20,8 @@
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+#include <linux/list.h>
+#include <linux/list_sort.h>
#include <linux/module.h>
#include <linux/capability.h>
#include <linux/errno.h>
@@ -32,6 +34,7 @@
#include <linux/net.h>
#include <linux/in6.h>
#include <linux/netdevice.h>
+#include <linux/inetdevice.h>
#include <linux/if_arp.h>
#include <linux/icmpv6.h>
#include <linux/init.h>
@@ -124,6 +127,228 @@ static struct net_device_stats *ip6_get_stats(struct net_device *dev)
return &dev->stats;
}
+int
+ip6_get_addrport(struct iphdr *iph, __be32 *saddr4, __be32 *daddr4,
+ __be16 *sport4, __be16 *dport4, __u8 *proto, int *icmperr)
+{
+ u8 *ptr;
+ struct iphdr *icmpiph = NULL;
+ struct tcphdr *tcph, *icmptcph;
+ struct udphdr *udph, *icmpudph;
+ struct icmphdr *icmph, *icmpicmph;
+
+ *icmperr = 0;
+ *saddr4 = iph->saddr;
+ *daddr4 = iph->daddr;
+ ptr = (u8 *)iph;
+ ptr += iph->ihl * 4;
+ switch (iph->protocol) {
+ case IPPROTO_TCP:
+ *proto = IPPROTO_TCP;
+ tcph = (struct tcphdr *)ptr;
+ *sport4 = tcph->source;
+ *dport4 = tcph->dest;
+ break;
+ case IPPROTO_UDP:
+ *proto = IPPROTO_UDP;
+ udph = (struct udphdr *)ptr;
+ *sport4 = udph->source;
+ *dport4 = udph->dest;
+ break;
+ case IPPROTO_ICMP:
+ *proto = IPPROTO_ICMP;
+ icmph = (struct icmphdr *)ptr;
+ switch (icmph->type) {
+ case ICMP_DEST_UNREACH:
+ case ICMP_SOURCE_QUENCH:
+ case ICMP_TIME_EXCEEDED:
+ case ICMP_PARAMETERPROB:
+ *icmperr = 1;
+ ptr = (u8 *)icmph;
+ ptr += sizeof(struct icmphdr);
+ icmpiph = (struct iphdr *)ptr;
+ *saddr4 = icmpiph->saddr;
+ *daddr4 = icmpiph->daddr;
+ if (ntohs(iph->tot_len) < icmpiph->ihl * 4 + 12)
+ return -1;
+ ptr += icmpiph->ihl * 4;
+ switch (icmpiph->protocol) {
+ case IPPROTO_TCP:
+ *proto = IPPROTO_TCP;
+ icmptcph = (struct tcphdr *)ptr;
+ *sport4 = icmptcph->source;
+ *dport4 = icmptcph->dest;
+ break;
+ case IPPROTO_UDP:
+ *proto = IPPROTO_UDP;
+ icmpudph = (struct udphdr *)ptr;
+ *sport4 = icmpudph->source;
+ *dport4 = icmpudph->dest;
+ break;
+ case IPPROTO_ICMP:
+ *proto = IPPROTO_ICMP;
+ icmpicmph = (struct icmphdr *)ptr;
+ *sport4 = icmpicmph->un.echo.id;
+ *dport4 = icmpicmph->un.echo.id;
+ break;
+ default:
+ return -1;
+ }
+ break;
+ default:
+ *sport4 = icmph->un.echo.id;
+ *dport4 = icmph->un.echo.id;
+ }
+ break;
+ default:
+ return -1;
+ }
+
+ return 0;
+}
+
+int
+ip6_mape_gen_addr6(struct ip6_tnl_rule *mr, struct in6_addr *addr6,
+ __be32 addr4, __be16 port4)
+{
+ int i, pbw0, pbi0, pbi1;
+ __u32 addr[4];
+ __u32 psid = 0;
+ __u32 mask = 0;
+ __u32 a = ntohl(addr4);
+ __u16 p = ntohs(port4);
+ int psid_prefix_length = 0;
+ int psid_mask;
+ __u32 id0 = 0;
+ __u32 id1 = 0;
+
+ /* If we have no rule then we can return immediately */
+ if (!mr)
+ return -1;
+
+ psid_prefix_length = mr->ea_length - (32 - mr->ipv4_prefixlen);
+
+ /* In some configurations the PSID can overlap the IPv4 address
+ * segment
+ */
+ if (psid_prefix_length < 0)
+ a &= 0xffffffff << (psid_prefix_length * -1);
+
+ /* Find the PSID from the port by shifting the non-PSID bits out */
+ if (psid_prefix_length > 0) {
+ mask = 0xffffffff >> (32 - psid_prefix_length);
+ psid =
+ (p >> (16 - psid_prefix_length - mr->psid_offset)) & mask;
+ }
+
+ /* We start with the IPv6 subnet provided for this rule */
+ for (i = 0; i < 4; ++i)
+ addr[i] = ntohl(mr->ipv6_subnet.s6_addr32[i]);
+
+ /* We then copy in the IPv4 host portion - pbw0 is the starting
+ * 32 bit chunk, pbi0 is the offset into that chunk
+ */
+ if (mr->ipv4_prefixlen < 32) {
+ pbw0 = mr->ipv6_prefixlen >> 5;
+ pbi0 = mr->ipv6_prefixlen & 0x1f;
+ addr[pbw0] |= (a << mr->ipv4_prefixlen) >> pbi0;
+ pbi1 = pbi0 - mr->ipv4_prefixlen;
+ if (pbi1 > 0)
+ addr[pbw0 + 1] |= a << (32 - pbi1);
+ }
+
+ /* The PSID may need to be inserted into the IPv6 address within the
+ * top 64 bits. Again: pbw0 is the chunk, pbi0 is the offset.
+ */
+ if ((psid_prefix_length - mr->psid_offset) > 0) {
+ psid_mask = mask;
+ pbw0 = (mr->ipv6_prefixlen + (32 - mr->ipv4_prefixlen)) >> 5;
+ pbi0 = (mr->ipv6_prefixlen + (32 - mr->ipv4_prefixlen)) & 0x1f;
+
+ pbi1 = pbi0 - (32 - psid_prefix_length);
+
+ if (pbi1 > 0) {
+ addr[pbw0] |= (psid >> pbi1);
+ addr[pbw0 + 1] |= (psid & psid_mask) << (32 - pbi1);
+ } else {
+ addr[pbw0] |= psid << (32 - pbi0 - psid_prefix_length);
+ }
+ }
+
+ /* The format of the interface id changes depending on version */
+ if (mr->version == MAP_VERSION_RFC) {
+ addr[2] |= (a >> 16);
+ addr[3] |= (a << 16);
+ addr[3] |= psid;
+ } else if (mr->version == MAP_VERSION_DRAFT3) {
+ id0 |= a >> 8;
+ id1 |= (a & 0xFF) << 24;
+ id1 |= psid << 8;
+ addr[2] |= id0;
+ addr[3] |= id1;
+ } else {
+ return -1;
+ }
+
+ /* Copy the formed address back into network order */
+ for (i = 0; i < 4; ++i)
+ addr6->s6_addr32[i] = htonl(addr[i]);
+
+ return 0;
+}
+
+static struct ip6_tnl_rule *ip6_tnl_rule_find(struct net_device *dev,
+ __be32 _dst)
+{
+ struct ip6_tnl *t = netdev_priv(dev);
+ struct ip6_rule_list *pos = NULL;
+ u32 dst = ntohl(_dst);
+
+ list_for_each_entry(pos, &t->rules.list, list) {
+ int mask =
+ 0xFFFFFFFF ^ ((1 << (32 - pos->data.ipv4_prefixlen)) - 1);
+ if ((dst & mask) == ntohl(pos->data.ipv4_subnet.s_addr))
+ return &pos->data;
+ }
+ return NULL;
+}
+
+static void
+ip6_tnl_mape_dst(struct net_device *dev, struct sk_buff *skb,
+ struct flowi6 *fl6)
+{
+ struct ip6_tnl *t = netdev_priv(dev);
+ struct iphdr *iph;
+ __be32 saddr4, daddr4, addr;
+ __be16 sport4, dport4, port;
+ __u8 proto;
+ int icmperr;
+ struct ip6_tnl_rule *mr = NULL;
+
+ /* If we have no rules then packets always go to the tunnel dst */
+ if (list_empty(&t->rules.list))
+ return;
+
+ /* Find the src / dst address / port (or ID for ICMP) */
+ iph = ip_hdr(skb);
+ ip6_get_addrport(iph, &saddr4, &daddr4, &sport4, &dport4, &proto,
+ &icmperr);
+
+ if (icmperr) {
+ mr = ip6_tnl_rule_find(dev, saddr4);
+ addr = saddr4;
+ port = sport4;
+ } else {
+ mr = ip6_tnl_rule_find(dev, daddr4);
+ addr = daddr4;
+ port = dport4;
+ }
+
+ /* Generate an destination IPv6 address from the internal packet */
+ if (mr)
+ ip6_mape_gen_addr6(mr, &fl6->daddr, addr, port);
+}
+
/**
* ip6_tnl_lookup - fetch tunnel matching the end-point addresses
* @remote: the address of the tunnel exit-point
@@ -207,6 +432,33 @@ ip6_tnl_bucket(struct ip6_tnl_net *ip6n, const struct __ip6_tnl_parm *p)
return &ip6n->tnls[prio][h];
}
+/**
+ * ip6_tnl_bucket_r_any - get head of list matching given tunnel parameters
+ * @p: parameters containing tunnel end-points
+ *
+ * Description:
+ * ip6_tnl_bucket_r_any() returns the head of the list matching the
+ * &struct in6_addr entry laddr in @p.
+ *
+ * Return: head of IPv6 tunnel list
+ **/
+
+static struct ip6_tnl __rcu **
+ip6_tnl_bucket_r_any(struct ip6_tnl_net *ip6n, const struct __ip6_tnl_parm *p)
+{
+ const struct in6_addr *local = &p->laddr;
+ unsigned int h = 0;
+ int prio = 0;
+ struct in6_addr any;
+
+ if (!ipv6_addr_any(local)) {
+ memset(&any, 0, sizeof(any));
+ prio = 1;
+ h = HASH(&any, local);
+ }
+ return &ip6n->tnls[prio][h];
+}
+
/**
* ip6_tnl_link - add tunnel to hash table
* @t: tunnel to be added
@@ -215,7 +467,12 @@ ip6_tnl_bucket(struct ip6_tnl_net *ip6n, const struct __ip6_tnl_parm *p)
static void
ip6_tnl_link(struct ip6_tnl_net *ip6n, struct ip6_tnl *t)
{
- struct ip6_tnl __rcu **tp = ip6_tnl_bucket(ip6n, &t->parms);
+ struct ip6_tnl __rcu **tp;
+
+ if (!list_empty(&t->rules.list))
+ tp = ip6_tnl_bucket_r_any(ip6n, &t->parms);
+ else
+ tp = ip6_tnl_bucket(ip6n, &t->parms);
if (t->parms.collect_md)
rcu_assign_pointer(ip6n->collect_md_tun, t);
@@ -234,6 +491,15 @@ ip6_tnl_unlink(struct ip6_tnl_net *ip6n, struct ip6_tnl *t)
struct ip6_tnl __rcu **tp;
struct ip6_tnl *iter;
+ for (tp = ip6_tnl_bucket_r_any(ip6n, &t->parms);
+ (iter = rtnl_dereference(*tp)) != NULL;
+ tp = &iter->next) {
+ if (t == iter) {
+ rcu_assign_pointer(*tp, t->next);
+ return;
+ }
+ }
+
if (t->parms.collect_md)
rcu_assign_pointer(ip6n->collect_md_tun, NULL);
@@ -352,6 +618,16 @@ static struct ip6_tnl *ip6_tnl_locate(struct net *net,
struct ip6_tnl *t;
struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id);
+ for (tp = ip6_tnl_bucket_r_any(ip6n, p);
+ (t = rtnl_dereference(*tp)) != NULL;
+ tp = &t->next) {
+ if (ipv6_addr_equal(local, &t->parms.laddr)) {
+ if (create)
+ return ERR_PTR(-EEXIST);
+ return t;
+ }
+ }
+
for (tp = ip6_tnl_bucket(ip6n, p);
(t = rtnl_dereference(*tp)) != NULL;
tp = &t->next) {
@@ -880,6 +1156,64 @@ static const struct tnl_ptk_info tpi_v4 = {
.proto = htons(ETH_P_IP),
};
+static int ip6_tnl_ipv4_addr_match(struct ip6_tnl *t, __be32 addr)
+{
+ struct in_device *ind;
+ int ret = 0;
+
+ ind = in_dev_get(t->dev);
+ if (!ind)
+ return 0;
+
+ for_ifa(ind) {
+ if (ifa->ifa_address == addr) {
+ ret = 1;
+ break;
+ }
+ }
+ endfor_ifa(ind);
+ in_dev_put(ind);
+
+ return ret;
+}
+
+static int ip6_tnl_map_rule_validate(struct ip6_tnl *t, struct sk_buff *skb)
+{
+ struct ipv6hdr *ipv6h;
+ struct iphdr *iph;
+ __be32 src, dst;
+ __be16 sport, dport;
+ __u8 proto;
+ int icmperr;
+ struct ip6_tnl_rule *mr = NULL;
+ struct in6_addr src6 = { };
+
+ if (likely(list_empty(&t->rules.list)))
+ return 1;
+
+ iph = ipip_hdr(skb);
+ ip6_get_addrport(iph, &src, &dst, &sport, &dport, &proto, &icmperr);
+
+ /* Check if the destination of the packet is for the MAP-E tunnel. */
+ if (!ip6_tnl_ipv4_addr_match(t, dst))
+ return 0;
+
+ /* if the packet's destination is for the tunnel, we need to check
+ * if the source ipv4 address matches any map rules. If there is
+ * no matching rule, just return success (the packet is from br).
+ * Otherwise, we check if the source ipv6 address is valid.
+ */
+ mr = ip6_tnl_rule_find(t->dev, src);
+ if (mr) {
+ ip6_mape_gen_addr6(mr, &src6, src, sport);
+ ipv6h = ipv6_hdr(skb);
+ if (!ipv6_addr_equal(&src6, &ipv6h->saddr))
+ return 0;
+ }
+
+ return 1;
+}
+
static int ipxip6_rcv(struct sk_buff *skb, u8 ipproto,
const struct tnl_ptk_info *tpi,
int (*dscp_ecn_decapsulate)(const struct ip6_tnl *t,
@@ -905,6 +1239,8 @@ static int ipxip6_rcv(struct sk_buff *skb, u8 ipproto,
goto drop;
if (iptunnel_pull_header(skb, 0, tpi->proto, false))
goto drop;
+ if (!ip6_tnl_map_rule_validate(t, skb))
+ goto drop;
if (t->parms.collect_md) {
tun_dst = ipv6_tun_rx_dst(skb, 0, 0, 0);
if (!tun_dst)
@@ -1092,6 +1428,12 @@ int ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev, __u8 dsfield,
use_cache = true;
}
+ /* In MAP-E mode we need to always do a route lookup */
+ if (!list_empty(&t->rules.list)) {
+ use_cache = false;
+ ip6_tnl_mape_dst(dev, skb, fl6);
+ }
+
if (use_cache)
dst = dst_cache_get(&t->dst_cache);
@@ -1863,6 +2205,8 @@ ip6_tnl_dev_init_gen(struct net_device *dev)
dev->min_mtu = ETH_MIN_MTU;
dev->max_mtu = IP6_MAX_MTU - dev->hard_header_len;
+ INIT_LIST_HEAD(&t->rules.list);
+
return 0;
destroy_dst:
@@ -1968,6 +2312,95 @@ static void ip6_tnl_netlink_parms(struct nlattr *data[],
if (data[IFLA_IPTUN_FWMARK])
parms->fwmark = nla_get_u32(data[IFLA_IPTUN_FWMARK]);
+
+ if (data[IFLA_IPTUN_RULE_ACTION])
+ parms->rule_action = nla_get_u8(data[IFLA_IPTUN_RULE_ACTION]);
+
+ if (data[IFLA_IPTUN_RULE_VERSION])
+ parms->rule.version = nla_get_u8(data[IFLA_IPTUN_RULE_VERSION]);
+
+ if (data[IFLA_IPTUN_RULE_IPV6_PREFIX])
+ parms->rule.ipv6_subnet =
+ nla_get_in6_addr(data[IFLA_IPTUN_RULE_IPV6_PREFIX]);
+
+ if (data[IFLA_IPTUN_RULE_IPV6_PREFIXLEN])
+ parms->rule.ipv6_prefixlen =
+ nla_get_u8(data[IFLA_IPTUN_RULE_IPV6_PREFIXLEN]);
+
+ if (data[IFLA_IPTUN_RULE_IPV4_PREFIX])
+ parms->rule.ipv4_subnet.s_addr =
+ nla_get_in_addr(data[IFLA_IPTUN_RULE_IPV4_PREFIX]);
+
+ if (data[IFLA_IPTUN_RULE_IPV4_PREFIXLEN])
+ parms->rule.ipv4_prefixlen =
+ nla_get_u8(data[IFLA_IPTUN_RULE_IPV4_PREFIXLEN]);
+
+ if (data[IFLA_IPTUN_RULE_EA_LENGTH])
+ parms->rule.ea_length =
+ nla_get_u8(data[IFLA_IPTUN_RULE_EA_LENGTH]);
+
+ if (data[IFLA_IPTUN_RULE_PSID_OFFSET])
+ parms->rule.psid_offset =
+ nla_get_u8(data[IFLA_IPTUN_RULE_PSID_OFFSET]);
+}
+
+static int ip6_tnl_rule_cmp(void *unused, struct list_head *_a,
+ struct list_head *_b)
+{
+ struct ip6_rule_list *a = list_entry(_a, struct ip6_rule_list, list);
+ struct ip6_rule_list *b = list_entry(_b, struct ip6_rule_list, list);
+ int diff;
+
+ diff = b->data.ipv4_prefixlen - a->data.ipv4_prefixlen;
+ if (!diff)
+ diff = b->data.ipv4_subnet.s_addr - a->data.ipv4_subnet.s_addr;
+
+ if (!diff)
+ diff = b->data.ipv6_prefixlen - a->data.ipv6_prefixlen;
+
+ if (!diff)
+ diff =
+ memcmp(&b->data.ipv6_subnet, &a->data.ipv6_subnet,
+ sizeof(b->data.ipv6_subnet));
+
+ if (!diff)
+ diff = b->data.ea_length - a->data.ea_length;
+
+ if (!diff)
+ diff = b->data.psid_offset - a->data.psid_offset;
+
+ return diff;
+}
+
+static void ip6_tnl_add_rule(struct net_device *dev,
+ struct __ip6_tnl_parm *new_cfg)
+{
+ struct ip6_tnl *t = netdev_priv(dev);
+ struct ip6_rule_list *new_rule = kmalloc(sizeof(t->rules), GFP_KERNEL);
+
+ if (!new_rule)
+ return;
+
+ memcpy(&new_rule->data, &new_cfg->rule, sizeof(new_rule->data));
+ INIT_LIST_HEAD(&new_rule->list);
+ list_add(&new_rule->list, &t->rules.list);
+ list_sort(NULL, &t->rules.list, ip6_tnl_rule_cmp);
+}
+
+static void ip6_tnl_delete_rule(struct net_device *dev,
+ struct __ip6_tnl_parm *_old_rule)
+{
+ struct ip6_tnl *t = netdev_priv(dev);
+ struct ip6_rule_list *pos = NULL;
+ struct ip6_rule_list old_rule = { .data = _old_rule->rule };
+ struct ip6_rule_list *iter = NULL;
+
+ list_for_each_entry_safe(pos, iter, &t->rules.list, list) {
+ if (ip6_tnl_rule_cmp(NULL, &pos->list, &old_rule.list) == 0) {
+ list_del(&pos->list);
+ break;
+ }
+ }
}
static bool ip6_tnl_netlink_encap_parms(struct nlattr *data[],
@@ -2035,6 +2468,16 @@ static int ip6_tnl_newlink(struct net *src_net, struct net_device *dev,
err = ip6_tnl_create2(dev);
if (!err && tb[IFLA_MTU])
ip6_tnl_change_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
+ if (!err && data[IFLA_IPTUN_RULE_ACTION]) {
+ switch (nla_get_u8(data[IFLA_IPTUN_RULE_ACTION])) {
+ case TUNNEL_RULE_ACTION_ADD:
+ ip6_tnl_add_rule(dev, &nt->parms);
+ break;
+ case TUNNEL_RULE_ACTION_DELETE:
+ ip6_tnl_delete_rule(dev, &nt->parms);
+ break;
+ }
+ }
return err;
}
@@ -2048,6 +2491,7 @@ static int ip6_tnl_changelink(struct net_device *dev, struct nlattr *tb[],
struct net *net = t->net;
struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id);
struct ip_tunnel_encap ipencap;
+ int err;
if (dev == ip6n->fb_tnl_dev)
return -EINVAL;
@@ -2069,13 +2513,32 @@ static int ip6_tnl_changelink(struct net_device *dev, struct nlattr *tb[],
} else
t = netdev_priv(dev);
- return ip6_tnl_update(t, &p);
+ err = ip6_tnl_update(t, &p);
+ if (!err && data[IFLA_IPTUN_RULE_ACTION]) {
+ switch (nla_get_u8(data[IFLA_IPTUN_RULE_ACTION])) {
+ case TUNNEL_RULE_ACTION_ADD:
+ ip6_tnl_add_rule(dev, &p);
+ break;
+ case TUNNEL_RULE_ACTION_DELETE:
+ ip6_tnl_delete_rule(dev, &p);
+ break;
+ }
+ }
+
+ return err;
}
static void ip6_tnl_dellink(struct net_device *dev, struct list_head *head)
{
struct net *net = dev_net(dev);
struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id);
+ struct ip6_tnl *t = netdev_priv(dev);
+ struct ip6_rule_list *pos = NULL;
+ struct ip6_rule_list *iter = NULL;
+
+ list_for_each_entry_safe(pos, iter, &t->rules.list, list) {
+ list_del(&pos->list);
+ }
if (dev != ip6n->fb_tnl_dev)
unregister_netdevice_queue(dev, head);
@@ -2112,6 +2575,22 @@ static size_t ip6_tnl_get_size(const struct net_device *dev)
nla_total_size(0) +
/* IFLA_IPTUN_FWMARK */
nla_total_size(4) +
+ /* IFLA_IPTUN_RULE_VERSION */
+ nla_total_size(1) +
+ /* IFLA_IPTUN_RULE_ACTION */
+ nla_total_size(1) +
+ /* IFLA_IPTUN_RULE_IPV6_PREFIXLEN */
+ nla_total_size(1) +
+ /* IFLA_IPTUN_RULE_IPV4_PREFIXLEN */
+ nla_total_size(1) +
+ /* IFLA_IPTUN_RULE_EA_LENGTH */
+ nla_total_size(1) +
+ /* IFLA_IPTUN_RULE_PSID_OFFSET */
+ nla_total_size(1) +
+ /* IFLA_IPTUN_RULE_IPV6_PREFIX */
+ nla_total_size(sizeof(struct in6_addr)) +
+ /* IFLA_IPTUN_RULE_IPV4_PREFIX */
+ nla_total_size(sizeof(struct in6_addr)) +
0;
}
@@ -2170,6 +2649,14 @@ static const struct nla_policy ip6_tnl_policy[IFLA_IPTUN_MAX + 1] = {
[IFLA_IPTUN_ENCAP_DPORT] = { .type = NLA_U16 },
[IFLA_IPTUN_COLLECT_METADATA] = { .type = NLA_FLAG },
[IFLA_IPTUN_FWMARK] = { .type = NLA_U32 },
+ [IFLA_IPTUN_RULE_VERSION] = { .type = NLA_U8 },
+ [IFLA_IPTUN_RULE_ACTION] = { .type = NLA_U8 },
+ [IFLA_IPTUN_RULE_IPV6_PREFIXLEN] = { .type = NLA_U8 },
+ [IFLA_IPTUN_RULE_IPV4_PREFIXLEN] = { .type = NLA_U8 },
+ [IFLA_IPTUN_RULE_EA_LENGTH] = { .type = NLA_U8 },
+ [IFLA_IPTUN_RULE_PSID_OFFSET] = { .type = NLA_U8 },
+ [IFLA_IPTUN_RULE_IPV6_PREFIX] = { .len = sizeof(struct in6_addr) },
+ [IFLA_IPTUN_RULE_IPV4_PREFIX] = { .len = sizeof(struct in_addr) },
};
static struct rtnl_link_ops ip6_link_ops __read_mostly = {
--
2.19.1
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