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Diffstat (limited to 'net/ipv4/fib_frontend.c')
-rw-r--r--net/ipv4/fib_frontend.c89
1 files changed, 73 insertions, 16 deletions
diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c
index ed14ec245584..b298255f6fdb 100644
--- a/net/ipv4/fib_frontend.c
+++ b/net/ipv4/fib_frontend.c
@@ -307,7 +307,7 @@ __be32 fib_compute_spec_dst(struct sk_buff *skb)
.flowi4_mark = vmark ? skb->mark : 0,
};
if (!fib_lookup(net, &fl4, &res, 0))
- return FIB_RES_PREFSRC(net, res);
+ return fib_result_prefsrc(net, &res);
} else {
scope = RT_SCOPE_LINK;
}
@@ -324,16 +324,16 @@ bool fib_info_nh_uses_dev(struct fib_info *fi, const struct net_device *dev)
for (ret = 0; ret < fi->fib_nhs; ret++) {
struct fib_nh *nh = &fi->fib_nh[ret];
- if (nh->nh_dev == dev) {
+ if (nh->fib_nh_dev == dev) {
dev_match = true;
break;
- } else if (l3mdev_master_ifindex_rcu(nh->nh_dev) == dev->ifindex) {
+ } else if (l3mdev_master_ifindex_rcu(nh->fib_nh_dev) == dev->ifindex) {
dev_match = true;
break;
}
}
#else
- if (fi->fib_nh[0].nh_dev == dev)
+ if (fi->fib_nh[0].fib_nh_dev == dev)
dev_match = true;
#endif
@@ -390,7 +390,7 @@ static int __fib_validate_source(struct sk_buff *skb, __be32 src, __be32 dst,
dev_match = fib_info_nh_uses_dev(res.fi, dev);
if (dev_match) {
- ret = FIB_RES_NH(res).nh_scope >= RT_SCOPE_HOST;
+ ret = FIB_RES_NHC(res)->nhc_scope >= RT_SCOPE_HOST;
return ret;
}
if (no_addr)
@@ -402,7 +402,7 @@ static int __fib_validate_source(struct sk_buff *skb, __be32 src, __be32 dst,
ret = 0;
if (fib_lookup(net, &fl4, &res, FIB_LOOKUP_IGNORE_LINKSTATE) == 0) {
if (res.type == RTN_UNICAST)
- ret = FIB_RES_NH(res).nh_scope >= RT_SCOPE_HOST;
+ ret = FIB_RES_NHC(res)->nhc_scope >= RT_SCOPE_HOST;
}
return ret;
@@ -558,7 +558,8 @@ static int rtentry_to_fib_config(struct net *net, int cmd, struct rtentry *rt,
if (rt->rt_gateway.sa_family == AF_INET && addr) {
unsigned int addr_type;
- cfg->fc_gw = addr;
+ cfg->fc_gw4 = addr;
+ cfg->fc_gw_family = AF_INET;
addr_type = inet_addr_type_table(net, addr, cfg->fc_table);
if (rt->rt_flags & RTF_GATEWAY &&
addr_type == RTN_UNICAST)
@@ -568,7 +569,7 @@ static int rtentry_to_fib_config(struct net *net, int cmd, struct rtentry *rt,
if (cmd == SIOCDELRT)
return 0;
- if (rt->rt_flags & RTF_GATEWAY && !cfg->fc_gw)
+ if (rt->rt_flags & RTF_GATEWAY && !cfg->fc_gw_family)
return -EINVAL;
if (cfg->fc_scope == RT_SCOPE_NOWHERE)
@@ -664,16 +665,61 @@ const struct nla_policy rtm_ipv4_policy[RTA_MAX + 1] = {
[RTA_DPORT] = { .type = NLA_U16 },
};
+int fib_gw_from_via(struct fib_config *cfg, struct nlattr *nla,
+ struct netlink_ext_ack *extack)
+{
+ struct rtvia *via;
+ int alen;
+
+ if (nla_len(nla) < offsetof(struct rtvia, rtvia_addr)) {
+ NL_SET_ERR_MSG(extack, "Invalid attribute length for RTA_VIA");
+ return -EINVAL;
+ }
+
+ via = nla_data(nla);
+ alen = nla_len(nla) - offsetof(struct rtvia, rtvia_addr);
+
+ switch (via->rtvia_family) {
+ case AF_INET:
+ if (alen != sizeof(__be32)) {
+ NL_SET_ERR_MSG(extack, "Invalid IPv4 address in RTA_VIA");
+ return -EINVAL;
+ }
+ cfg->fc_gw_family = AF_INET;
+ cfg->fc_gw4 = *((__be32 *)via->rtvia_addr);
+ break;
+ case AF_INET6:
+#ifdef CONFIG_IPV6
+ if (alen != sizeof(struct in6_addr)) {
+ NL_SET_ERR_MSG(extack, "Invalid IPv6 address in RTA_VIA");
+ return -EINVAL;
+ }
+ cfg->fc_gw_family = AF_INET6;
+ cfg->fc_gw6 = *((struct in6_addr *)via->rtvia_addr);
+#else
+ NL_SET_ERR_MSG(extack, "IPv6 support not enabled in kernel");
+ return -EINVAL;
+#endif
+ break;
+ default:
+ NL_SET_ERR_MSG(extack, "Unsupported address family in RTA_VIA");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
static int rtm_to_fib_config(struct net *net, struct sk_buff *skb,
struct nlmsghdr *nlh, struct fib_config *cfg,
struct netlink_ext_ack *extack)
{
+ bool has_gw = false, has_via = false;
struct nlattr *attr;
int err, remaining;
struct rtmsg *rtm;
- err = nlmsg_validate(nlh, sizeof(*rtm), RTA_MAX, rtm_ipv4_policy,
- extack);
+ err = nlmsg_validate_deprecated(nlh, sizeof(*rtm), RTA_MAX,
+ rtm_ipv4_policy, extack);
if (err < 0)
goto errout;
@@ -708,12 +754,17 @@ static int rtm_to_fib_config(struct net *net, struct sk_buff *skb,
cfg->fc_oif = nla_get_u32(attr);
break;
case RTA_GATEWAY:
- cfg->fc_gw = nla_get_be32(attr);
+ has_gw = true;
+ cfg->fc_gw4 = nla_get_be32(attr);
+ if (cfg->fc_gw4)
+ cfg->fc_gw_family = AF_INET;
break;
case RTA_VIA:
- NL_SET_ERR_MSG(extack, "IPv4 does not support RTA_VIA attribute");
- err = -EINVAL;
- goto errout;
+ has_via = true;
+ err = fib_gw_from_via(cfg, attr, extack);
+ if (err)
+ goto errout;
+ break;
case RTA_PRIORITY:
cfg->fc_priority = nla_get_u32(attr);
break;
@@ -752,6 +803,12 @@ static int rtm_to_fib_config(struct net *net, struct sk_buff *skb,
}
}
+ if (has_gw && has_via) {
+ NL_SET_ERR_MSG(extack,
+ "Nexthop configuration can not contain both GATEWAY and VIA");
+ goto errout;
+ }
+
return 0;
errout:
return err;
@@ -839,8 +896,8 @@ int ip_valid_fib_dump_req(struct net *net, const struct nlmsghdr *nlh,
filter->rt_type = rtm->rtm_type;
filter->table_id = rtm->rtm_table;
- err = nlmsg_parse_strict(nlh, sizeof(*rtm), tb, RTA_MAX,
- rtm_ipv4_policy, extack);
+ err = nlmsg_parse_deprecated_strict(nlh, sizeof(*rtm), tb, RTA_MAX,
+ rtm_ipv4_policy, extack);
if (err < 0)
return err;
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-26 09:39:38 +0000