diff options
Diffstat (limited to 'net/ipv6')
| -rw-r--r-- | net/ipv6/seg6_local.c | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/net/ipv6/seg6_local.c b/net/ipv6/seg6_local.c index 26db4d3e8755..9c1a885ee482 100644 --- a/net/ipv6/seg6_local.c +++ b/net/ipv6/seg6_local.c @@ -30,6 +30,7 @@ #ifdef CONFIG_IPV6_SEG6_HMAC #include <net/seg6_hmac.h> #endif +#include <linux/etherdevice.h> struct seg6_local_lwt; @@ -226,6 +227,82 @@ drop: return -EINVAL; } +static int input_action_end_t(struct sk_buff *skb, struct seg6_local_lwt *slwt) +{ + struct ipv6_sr_hdr *srh; + + srh = get_and_validate_srh(skb); + if (!srh) + goto drop; + + advance_nextseg(srh, &ipv6_hdr(skb)->daddr); + + lookup_nexthop(skb, NULL, slwt->table); + + return dst_input(skb); + +drop: + kfree_skb(skb); + return -EINVAL; +} + +/* decapsulate and forward inner L2 frame on specified interface */ +static int input_action_end_dx2(struct sk_buff *skb, + struct seg6_local_lwt *slwt) +{ + struct net *net = dev_net(skb->dev); + struct net_device *odev; + struct ethhdr *eth; + + if (!decap_and_validate(skb, NEXTHDR_NONE)) + goto drop; + + if (!pskb_may_pull(skb, ETH_HLEN)) + goto drop; + + skb_reset_mac_header(skb); + eth = (struct ethhdr *)skb->data; + + /* To determine the frame's protocol, we assume it is 802.3. This avoids + * a call to eth_type_trans(), which is not really relevant for our + * use case. + */ + if (!eth_proto_is_802_3(eth->h_proto)) + goto drop; + + odev = dev_get_by_index_rcu(net, slwt->oif); + if (!odev) + goto drop; + + /* As we accept Ethernet frames, make sure the egress device is of + * the correct type. + */ + if (odev->type != ARPHRD_ETHER) + goto drop; + + if (!(odev->flags & IFF_UP) || !netif_carrier_ok(odev)) + goto drop; + + skb_orphan(skb); + + if (skb_warn_if_lro(skb)) + goto drop; + + skb_forward_csum(skb); + + if (skb->len - ETH_HLEN > odev->mtu) + goto drop; + + skb->dev = odev; + skb->protocol = eth->h_proto; + + return dev_queue_xmit(skb); + +drop: + kfree_skb(skb); + return -EINVAL; +} + /* decapsulate and forward to specified nexthop */ static int input_action_end_dx6(struct sk_buff *skb, struct seg6_local_lwt *slwt) @@ -260,6 +337,56 @@ drop: return -EINVAL; } +static int input_action_end_dx4(struct sk_buff *skb, + struct seg6_local_lwt *slwt) +{ + struct iphdr *iph; + __be32 nhaddr; + int err; + + if (!decap_and_validate(skb, IPPROTO_IPIP)) + goto drop; + + if (!pskb_may_pull(skb, sizeof(struct iphdr))) + goto drop; + + skb->protocol = htons(ETH_P_IP); + + iph = ip_hdr(skb); + + nhaddr = slwt->nh4.s_addr ?: iph->daddr; + + skb_dst_drop(skb); + + err = ip_route_input(skb, nhaddr, iph->saddr, 0, skb->dev); + if (err) + goto drop; + + return dst_input(skb); + +drop: + kfree_skb(skb); + return -EINVAL; +} + +static int input_action_end_dt6(struct sk_buff *skb, + struct seg6_local_lwt *slwt) +{ + if (!decap_and_validate(skb, IPPROTO_IPV6)) + goto drop; + + if (!pskb_may_pull(skb, sizeof(struct ipv6hdr))) + goto drop; + + lookup_nexthop(skb, NULL, slwt->table); + + return dst_input(skb); + +drop: + kfree_skb(skb); + return -EINVAL; +} + /* push an SRH on top of the current one */ static int input_action_end_b6(struct sk_buff *skb, struct seg6_local_lwt *slwt) { @@ -330,11 +457,31 @@ static struct seg6_action_desc seg6_action_table[] = { .input = input_action_end_x, }, { + .action = SEG6_LOCAL_ACTION_END_T, + .attrs = (1 << SEG6_LOCAL_TABLE), + .input = input_action_end_t, + }, + { + .action = SEG6_LOCAL_ACTION_END_DX2, + .attrs = (1 << SEG6_LOCAL_OIF), + .input = input_action_end_dx2, + }, + { .action = SEG6_LOCAL_ACTION_END_DX6, .attrs = (1 << SEG6_LOCAL_NH6), .input = input_action_end_dx6, }, { + .action = SEG6_LOCAL_ACTION_END_DX4, + .attrs = (1 << SEG6_LOCAL_NH4), + .input = input_action_end_dx4, + }, + { + .action = SEG6_LOCAL_ACTION_END_DT6, + .attrs = (1 << SEG6_LOCAL_TABLE), + .input = input_action_end_dt6, + }, + { .action = SEG6_LOCAL_ACTION_END_B6, .attrs = (1 << SEG6_LOCAL_SRH), .input = input_action_end_b6, |