main.c aktualisiert
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main.c
618
main.c
@ -25,479 +25,287 @@
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#define VLAN_MAX_DEPTH 2
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#define IPV6_EXT_MAX_CHAIN 6
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struct vlan_hdr {
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__be16 h_vlan_TCI;
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__be16 h_vlan_encapsulated_proto;
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};
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/* Auto-learned VLAN info */
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struct vlan_learning_entry {
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__u16 vlan_id;
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__u16 confidence;
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__u32 last_seen;
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};
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struct {
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__uint(type, BPF_MAP_TYPE_HASH);
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__type(key, __u32);
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__type(value, struct vlan_learning_entry);
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__uint(max_entries, 512);
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} xdp_vlan_learning SEC(".maps");
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struct vlan_parent_info {
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__u32 parent_ifindex;
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__u16 vlan_id;
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__u16 pad;
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};
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struct {
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__uint(type, BPF_MAP_TYPE_HASH);
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__type(key, __u32);
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__type(value, struct vlan_parent_info);
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__uint(max_entries, 512);
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} xdp_vlan_parents SEC(".maps");
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__uint(type, BPF_MAP_TYPE_DEVMAP);
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__uint(key_size, sizeof(int));
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__uint(value_size, sizeof(int));
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__uint(max_entries, 512);
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} xdp_l3fwd_ports SEC(".maps");
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struct flow_key {
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__u8 proto;
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__u8 pad[3];
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__u16 vlan_id;
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__u16 pad2;
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__u8 proto;
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__u8 pad[3];
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__u16 vlan_id;
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__u16 pad2;
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union {
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__u32 ipv4_src;
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__u8 ipv6_src[16];
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};
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union {
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__u32 ipv4_dst;
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__u8 ipv6_dst[16];
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};
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union {
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__u32 ipv4_src;
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__u8 ipv6_src[16];
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};
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__u16 sport;
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__u16 dport;
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union {
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__u32 ipv4_dst;
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__u8 ipv6_dst[16];
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};
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__u16 sport;
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__u16 dport;
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};
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struct flow_stats {
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__u64 packets;
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__u64 bytes;
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__u64 packets;
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__u64 bytes;
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};
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struct {
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__uint(type, BPF_MAP_TYPE_PERCPU_HASH);
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__uint(key_size, sizeof(struct flow_key));
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__uint(value_size, sizeof(struct flow_stats));
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__uint(max_entries, 65536);
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__uint(type, BPF_MAP_TYPE_PERCPU_HASH);
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__uint(key_size, sizeof(struct flow_key));
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__uint(value_size, sizeof(struct flow_stats));
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__uint(max_entries, 65536);
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} xdp_flow_stats SEC(".maps");
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struct vlan_hdr {
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__be16 h_vlan_TCI;
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__be16 h_vlan_encapsulated_proto;
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};
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static __always_inline int ip_decrease_ttl(struct iphdr *iph)
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{
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__u32 check = (__u32)iph->check;
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check += (__u32)bpf_htons(0x0100);
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iph->check = (__sum16)(check + (check >= 0xFFFF));
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return --iph->ttl;
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__u32 check = (__u32)iph->check;
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check += (__u32)bpf_htons(0x0100);
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iph->check = (__sum16)(check + (check >= 0xFFFF));
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return --iph->ttl;
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}
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static __always_inline void record_stats(struct flow_key *key, __u64 bytes)
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static __always_inline void record_stats(struct xdp_md *ctx, struct flow_key *key, __u64 bytes)
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{
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struct flow_stats *stats = bpf_map_lookup_elem(&xdp_flow_stats, key);
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if (stats) {
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stats->packets++;
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stats->bytes += bytes;
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} else {
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struct flow_stats new_stats = {
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.packets = 1,
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.bytes = bytes,
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};
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bpf_map_update_elem(&xdp_flow_stats, key, &new_stats, BPF_ANY);
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}
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}
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struct flow_stats *stats;
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static __always_inline void learn_vlan(struct xdp_md *ctx, __u16 vlan_id)
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{
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__u32 ifindex = ctx->ingress_ifindex;
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struct vlan_learning_entry *entry = bpf_map_lookup_elem(&xdp_vlan_learning, &ifindex);
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if (entry) {
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if (vlan_id > 0) {
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if (entry->vlan_id == vlan_id) {
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if (entry->confidence < 65535)
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entry->confidence++;
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} else if (entry->confidence > 0) {
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entry->confidence--;
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if (entry->confidence == 0) {
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entry->vlan_id = vlan_id;
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entry->confidence = 1;
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}
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}
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}
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} else if (vlan_id > 0) {
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struct vlan_learning_entry new_entry = {
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.vlan_id = vlan_id,
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.confidence = 1,
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.last_seen = 0,
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};
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bpf_map_update_elem(&xdp_vlan_learning, &ifindex, &new_entry, BPF_ANY);
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}
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}
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static __always_inline __u16 get_interface_vlan(struct xdp_md *ctx, __u32 ifindex)
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{
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struct vlan_parent_info *parent_info = bpf_map_lookup_elem(&xdp_vlan_parents, &ifindex);
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if (parent_info && parent_info->vlan_id > 0) {
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return parent_info->vlan_id;
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}
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struct vlan_learning_entry *learned = bpf_map_lookup_elem(&xdp_vlan_learning, &ifindex);
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if (learned && learned->confidence > 5) {
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return learned->vlan_id;
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}
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__u32 ingress_idx = ctx->ingress_ifindex;
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if (ingress_idx != ifindex) {
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struct vlan_learning_entry *ingress_learned = bpf_map_lookup_elem(&xdp_vlan_learning, &ingress_idx);
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if (ingress_learned && ingress_learned->confidence > 10) {
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struct vlan_learning_entry *egress_learned = bpf_map_lookup_elem(&xdp_vlan_learning, &ifindex);
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if (!egress_learned || egress_learned->confidence < 3) {
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return 0;
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}
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}
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}
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return 0;
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stats = bpf_map_lookup_elem(&xdp_flow_stats, key);
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if (stats) {
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stats->packets++;
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stats->bytes += bytes;
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} else {
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struct flow_stats new_stats = {
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.packets = 1,
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.bytes = bytes,
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};
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bpf_map_update_elem(&xdp_flow_stats, key, &new_stats, BPF_ANY);
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}
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}
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static __always_inline int parse_vlan(void *data, void *data_end, __u64 *nh_off, __u16 *h_proto, __u16 *vlan_id)
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{
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struct vlan_hdr *vh;
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#pragma unroll
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for (int i = 0; i < VLAN_MAX_DEPTH; i++) {
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if (*h_proto != bpf_htons(ETH_P_8021Q) && *h_proto != bpf_htons(ETH_P_8021AD))
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break;
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struct vlan_hdr *vhdr;
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int i, vlan_count = 0;
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vh = (void *)((char *)data + *nh_off);
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if ((void *)(vh + 1) > data_end)
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return -1;
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#pragma unroll
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for (i = 0; i < VLAN_MAX_DEPTH; i++) {
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if (*h_proto != bpf_htons(ETH_P_8021Q) && *h_proto != bpf_htons(ETH_P_8021AD))
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break;
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if (i == 0)
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*vlan_id = bpf_ntohs(vh->h_vlan_TCI) & 0x0FFF;
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vhdr = data + *nh_off;
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if ((void *)(vhdr + 1) > data_end)
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return -1;
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*nh_off += sizeof(*vh);
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*h_proto = vh->h_vlan_encapsulated_proto;
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}
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return 0;
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if (i == 0)
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*vlan_id = bpf_ntohs(vhdr->h_vlan_TCI) & 0x0FFF;
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*nh_off += sizeof(*vhdr);
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*h_proto = vhdr->h_vlan_encapsulated_proto;
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vlan_count++;
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}
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return vlan_count;
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}
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static __always_inline int skip_ip6hdrext(void *data, void *data_end, __u64 *nh_off, __u8 next)
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static __always_inline int skip_ip6hdrext(void *data, void *data_end, __u64 *nh_off, __u8 next_hdr_type)
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{
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struct ipv6_opt_hdr *hdr;
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#pragma unroll
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for (int i = 0; i < IPV6_EXT_MAX_CHAIN; i++) {
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hdr = (void *)((char *)data + *nh_off);
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if ((void *)(hdr + 1) > data_end)
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return -1;
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struct ipv6_opt_hdr {
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__u8 nexthdr;
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__u8 hdrlen;
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} *hdr;
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int i;
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switch (next) {
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case IPPROTO_HOPOPTS:
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case IPPROTO_DSTOPTS:
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case IPPROTO_ROUTING:
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case IPPROTO_MH:
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*nh_off += (hdr->hdrlen + 1) * 8;
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next = hdr->nexthdr;
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break;
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case IPPROTO_AH:
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*nh_off += (hdr->hdrlen + 2) * 4;
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next = hdr->nexthdr;
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break;
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case IPPROTO_FRAGMENT:
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*nh_off += 8;
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next = hdr->nexthdr;
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break;
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default:
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return next;
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}
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}
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return -1;
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}
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#pragma unroll
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for (i = 0; i < IPV6_EXT_MAX_CHAIN; i++) {
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hdr = data + *nh_off;
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if ((void *)(hdr + 1) > data_end)
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return -1;
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/* Insert VLAN tag using head adjustment */
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static __always_inline int insert_vlan_tag(struct xdp_md *ctx, __u16 vlan_id)
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{
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void *data_end = (void *)(long)ctx->data_end;
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void *data = (void *)(long)ctx->data;
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struct ethhdr *old_eth = data;
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if ((void *)(old_eth + 1) > data_end)
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return -1;
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struct ethhdr orig_eth;
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__builtin_memcpy(&orig_eth, old_eth, sizeof(orig_eth));
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/* Expand headroom */
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if (bpf_xdp_adjust_head(ctx, -(int)sizeof(struct vlan_hdr)))
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return -1;
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/* Re-read pointers after head adjustment */
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data = (void *)(long)ctx->data;
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data_end = (void *)(long)ctx->data_end;
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struct ethhdr *new_eth = data;
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struct vlan_hdr *vlan = (struct vlan_hdr *)(new_eth + 1);
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if ((void *)(vlan + 1) > data_end)
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return -1;
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/* Copy ethernet header to new position */
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__builtin_memcpy(new_eth->h_dest, orig_eth.h_dest, ETH_ALEN);
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__builtin_memcpy(new_eth->h_source, orig_eth.h_source, ETH_ALEN);
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/* Set up VLAN header */
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vlan->h_vlan_TCI = bpf_htons(vlan_id & 0x0FFF);
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vlan->h_vlan_encapsulated_proto = orig_eth.h_proto;
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/* Update ethernet proto to VLAN */
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new_eth->h_proto = bpf_htons(ETH_P_8021Q);
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return 0;
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}
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switch (next_hdr_type) {
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case IPPROTO_HOPOPTS:
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case IPPROTO_DSTOPTS:
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case IPPROTO_ROUTING:
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case IPPROTO_MH:
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*nh_off += (hdr->hdrlen + 1) * 8;
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next_hdr_type = hdr->nexthdr;
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break;
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case IPPROTO_AH:
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*nh_off += (hdr->hdrlen + 2) * 4;
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next_hdr_type = hdr->nexthdr;
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break;
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case IPPROTO_FRAGMENT:
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*nh_off += 8;
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next_hdr_type = hdr->nexthdr;
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break;
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default:
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return next_hdr_type;
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}
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}
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/* Remove VLAN tag */
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static __always_inline int remove_vlan_tag(struct xdp_md *ctx)
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{
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void *data_end = (void *)(long)ctx->data_end;
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void *data = (void *)(long)ctx->data;
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struct ethhdr *eth = data;
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struct vlan_hdr *vlan = (struct vlan_hdr *)(eth + 1);
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if ((void *)(vlan + 1) > data_end)
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return -1;
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__be16 encap_proto = vlan->h_vlan_encapsulated_proto;
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struct ethhdr tmp_eth;
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__builtin_memcpy(&tmp_eth, eth, sizeof(tmp_eth));
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/* Adjust head to remove VLAN header */
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if (bpf_xdp_adjust_head(ctx, (int)sizeof(struct vlan_hdr)))
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return -1;
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/* Re-read pointers after head adjustment */
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data = (void *)(long)ctx->data;
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data_end = (void *)(long)ctx->data_end;
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eth = data;
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if ((void *)(eth + 1) > data_end)
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return -1;
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__builtin_memcpy(eth->h_dest, tmp_eth.h_dest, ETH_ALEN);
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__builtin_memcpy(eth->h_source, tmp_eth.h_source, ETH_ALEN);
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eth->h_proto = encap_proto;
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return 0;
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return -1;
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}
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static __always_inline int xdp_l3fwd_flags(struct xdp_md *ctx, __u32 flags)
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{
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void *data_end = (void *)(long)ctx->data_end;
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void *data = (void *)(long)ctx->data;
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void *data_end = (void *)(long)ctx->data_end;
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void *data = (void *)(long)ctx->data;
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struct bpf_fib_lookup fib_params;
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struct ethhdr *eth = data;
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struct ipv6hdr *ip6h;
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struct iphdr *iph;
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__u16 h_proto;
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__u64 nh_off;
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int rc, vlan_count;
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__u16 vlan_id = 0;
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struct ethhdr *eth = data;
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__u64 nh_off = sizeof(*eth);
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if ((void *)((char *)data + nh_off) > data_end)
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return XDP_DROP;
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nh_off = sizeof(*eth);
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if (data + nh_off > data_end)
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return XDP_DROP;
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struct bpf_fib_lookup fib_params = {};
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__u16 h_proto = eth->h_proto;
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__u16 vlan_id = 0;
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__u16 orig_vlan_id = 0;
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int had_vlan = 0;
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__builtin_memset(&fib_params, 0, sizeof(fib_params));
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h_proto = eth->h_proto;
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if (h_proto == bpf_htons(ETH_P_8021Q) || h_proto == bpf_htons(ETH_P_8021AD))
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had_vlan = 1;
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vlan_count = parse_vlan(data, data_end, &nh_off, &h_proto, &vlan_id);
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if (vlan_count < 0)
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return XDP_DROP;
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if (parse_vlan(data, data_end, &nh_off, &h_proto, &vlan_id) < 0)
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return XDP_DROP;
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orig_vlan_id = vlan_id;
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if (vlan_id > 0)
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learn_vlan(ctx, vlan_id);
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struct flow_key key = {};
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key.vlan_id = vlan_id;
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__u64 bytes = data_end - data;
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struct flow_key key = {};
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key.vlan_id = vlan_id;
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__u64 bytes = (char *)data_end - (char *)data;
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if (h_proto == bpf_htons(ETH_P_IP)) {
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iph = data + nh_off;
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if ((void *)(iph + 1) > data_end)
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return XDP_DROP;
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if (h_proto == bpf_htons(ETH_P_IP)) {
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struct iphdr *iph = (void *)((char *)data + nh_off);
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if ((void *)(iph + 1) > data_end)
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return XDP_DROP;
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if (iph->ttl <= 1)
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return XDP_PASS;
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if (iph->ttl <= 1)
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return XDP_PASS;
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key.proto = iph->protocol;
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key.ipv4_src = iph->saddr;
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key.ipv4_dst = iph->daddr;
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key.proto = iph->protocol;
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key.ipv4_src = iph->saddr;
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key.ipv4_dst = iph->daddr;
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/* Calculate L4 offset - use pointer arithmetic from iph */
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__u8 ihl = iph->ihl;
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if (ihl < 5)
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return XDP_DROP;
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__u8 ihl = iph->ihl;
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if (ihl < 5)
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return XDP_DROP;
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__u64 l4_off = nh_off + (ihl * 4);
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void *l4_hdr = (void *)((char *)data + l4_off);
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if ((void *)((char *)l4_hdr + 4) <= data_end) {
|
||||
if (iph->protocol == IPPROTO_TCP || iph->protocol == IPPROTO_UDP) {
|
||||
__u16 *ports = l4_hdr;
|
||||
key.sport = ports[0];
|
||||
key.dport = ports[1];
|
||||
fib_params.sport = ports[0];
|
||||
fib_params.dport = ports[1];
|
||||
}
|
||||
}
|
||||
void *l4ptr = (void *)iph + (ihl * 4);
|
||||
|
||||
if (iph->protocol == IPPROTO_TCP) {
|
||||
struct tcphdr *tcph = l4ptr;
|
||||
if ((void *)(tcph + 1) > data_end)
|
||||
goto skip_v4_ports;
|
||||
key.sport = tcph->source;
|
||||
key.dport = tcph->dest;
|
||||
} else if (iph->protocol == IPPROTO_UDP) {
|
||||
struct udphdr *udph = l4ptr;
|
||||
if ((void *)(udph + 1) > data_end)
|
||||
goto skip_v4_ports;
|
||||
key.sport = udph->source;
|
||||
key.dport = udph->dest;
|
||||
}
|
||||
|
||||
fib_params.family = AF_INET;
|
||||
fib_params.tos = iph->tos;
|
||||
fib_params.l4_protocol = iph->protocol;
|
||||
fib_params.tot_len = bpf_ntohs(iph->tot_len);
|
||||
fib_params.ipv4_src = iph->saddr;
|
||||
fib_params.ipv4_dst = iph->daddr;
|
||||
skip_v4_ports:
|
||||
fib_params.family = AF_INET;
|
||||
fib_params.tos = iph->tos;
|
||||
fib_params.l4_protocol = iph->protocol;
|
||||
fib_params.tot_len = bpf_ntohs(iph->tot_len);
|
||||
fib_params.ipv4_src = iph->saddr;
|
||||
fib_params.ipv4_dst = iph->daddr;
|
||||
|
||||
} else if (h_proto == bpf_htons(ETH_P_IPV6)) {
|
||||
struct ipv6hdr *ip6h = (void *)((char *)data + nh_off);
|
||||
if ((void *)(ip6h + 1) > data_end)
|
||||
return XDP_DROP;
|
||||
} else if (h_proto == bpf_htons(ETH_P_IPV6)) {
|
||||
ip6h = data + nh_off;
|
||||
if ((void *)(ip6h + 1) > data_end)
|
||||
return XDP_DROP;
|
||||
|
||||
if (ip6h->hop_limit <= 1)
|
||||
return XDP_PASS;
|
||||
if (ip6h->hop_limit <= 1)
|
||||
return XDP_PASS;
|
||||
|
||||
__builtin_memcpy(key.ipv6_src, &ip6h->saddr, 16);
|
||||
__builtin_memcpy(key.ipv6_dst, &ip6h->daddr, 16);
|
||||
__builtin_memcpy(key.ipv6_src, &ip6h->saddr, 16);
|
||||
__builtin_memcpy(key.ipv6_dst, &ip6h->daddr, 16);
|
||||
|
||||
__u64 l4_off = nh_off + sizeof(*ip6h);
|
||||
int l4_proto = skip_ip6hdrext(data, data_end, &l4_off, ip6h->nexthdr);
|
||||
if (l4_proto < 0)
|
||||
l4_proto = ip6h->nexthdr;
|
||||
__u64 l4_off = nh_off + sizeof(*ip6h);
|
||||
int l4_proto = skip_ip6hdrext(data, data_end, &l4_off, ip6h->nexthdr);
|
||||
|
||||
if (l4_proto < 0)
|
||||
l4_proto = ip6h->nexthdr;
|
||||
|
||||
key.proto = l4_proto;
|
||||
key.proto = l4_proto;
|
||||
|
||||
void *l4_hdr = (void *)((char *)data + l4_off);
|
||||
if ((void *)((char *)l4_hdr + 4) <= data_end) {
|
||||
if (l4_proto == IPPROTO_TCP || l4_proto == IPPROTO_UDP) {
|
||||
__u16 *ports = l4_hdr;
|
||||
key.sport = ports[0];
|
||||
key.dport = ports[1];
|
||||
fib_params.sport = ports[0];
|
||||
fib_params.dport = ports[1];
|
||||
}
|
||||
}
|
||||
void *l4ptr = data + l4_off;
|
||||
|
||||
fib_params.family = AF_INET6;
|
||||
__be32 flow = *(__be32 *)ip6h & IPV6_FLOWINFO_MASK;
|
||||
fib_params.flowinfo = flow;
|
||||
fib_params.l4_protocol = l4_proto;
|
||||
fib_params.tot_len = bpf_ntohs(ip6h->payload_len);
|
||||
__builtin_memcpy(fib_params.ipv6_src, &ip6h->saddr, 16);
|
||||
__builtin_memcpy(fib_params.ipv6_dst, &ip6h->daddr, 16);
|
||||
} else {
|
||||
return XDP_PASS;
|
||||
}
|
||||
if (l4_proto == IPPROTO_TCP) {
|
||||
struct tcphdr *tcph = l4ptr;
|
||||
if ((void *)(tcph + 1) > data_end)
|
||||
goto skip_v6_ports;
|
||||
key.sport = tcph->source;
|
||||
key.dport = tcph->dest;
|
||||
} else if (l4_proto == IPPROTO_UDP) {
|
||||
struct udphdr *udph = l4ptr;
|
||||
if ((void *)(udph + 1) > data_end)
|
||||
goto skip_v6_ports;
|
||||
key.sport = udph->source;
|
||||
key.dport = udph->dest;
|
||||
}
|
||||
|
||||
fib_params.ifindex = ctx->ingress_ifindex;
|
||||
skip_v6_ports:
|
||||
fib_params.family = AF_INET6;
|
||||
fib_params.flowinfo = *(__be32 *)ip6h & IPV6_FLOWINFO_MASK;
|
||||
fib_params.l4_protocol = l4_proto;
|
||||
fib_params.tot_len = bpf_ntohs(ip6h->payload_len);
|
||||
__builtin_memcpy(fib_params.ipv6_src, &ip6h->saddr, 16);
|
||||
__builtin_memcpy(fib_params.ipv6_dst, &ip6h->daddr, 16);
|
||||
} else {
|
||||
return XDP_PASS;
|
||||
}
|
||||
|
||||
int rc = bpf_fib_lookup(ctx, &fib_params, sizeof(fib_params), flags);
|
||||
if (rc == 0) {
|
||||
record_stats(&key, bytes);
|
||||
fib_params.ifindex = ctx->ingress_ifindex;
|
||||
rc = bpf_fib_lookup(ctx, &fib_params, sizeof(fib_params), flags);
|
||||
|
||||
if (rc == BPF_FIB_LKUP_RET_SUCCESS) {
|
||||
if (!bpf_map_lookup_elem(&xdp_l3fwd_ports, &fib_params.ifindex))
|
||||
return XDP_PASS;
|
||||
|
||||
__u16 egress_vlan = get_interface_vlan(ctx, fib_params.ifindex);
|
||||
|
||||
if (egress_vlan > 0 && !had_vlan) {
|
||||
/* Need to add VLAN tag */
|
||||
if (insert_vlan_tag(ctx, egress_vlan) < 0)
|
||||
return XDP_DROP;
|
||||
|
||||
} else if (egress_vlan == 0 && had_vlan) {
|
||||
/* Need to remove VLAN tag */
|
||||
if (remove_vlan_tag(ctx) < 0) {
|
||||
/* Keep VLAN if removal fails */
|
||||
}
|
||||
|
||||
} else if (egress_vlan > 0 && had_vlan && egress_vlan != orig_vlan_id) {
|
||||
/* Need to change VLAN ID - reload pointers first */
|
||||
data = (void *)(long)ctx->data;
|
||||
data_end = (void *)(long)ctx->data_end;
|
||||
eth = data;
|
||||
|
||||
if ((void *)(eth + 1) > data_end)
|
||||
return XDP_DROP;
|
||||
|
||||
if (eth->h_proto == bpf_htons(ETH_P_8021Q) ||
|
||||
eth->h_proto == bpf_htons(ETH_P_8021AD)) {
|
||||
struct vlan_hdr *vlan = (struct vlan_hdr *)(eth + 1);
|
||||
if ((void *)(vlan + 1) > data_end)
|
||||
return XDP_DROP;
|
||||
|
||||
vlan->h_vlan_TCI = bpf_htons(egress_vlan & 0x0FFF);
|
||||
}
|
||||
}
|
||||
|
||||
/* CRITICAL: Always reload pointers after FIB lookup to satisfy verifier */
|
||||
data = (void *)(long)ctx->data;
|
||||
data_end = (void *)(long)ctx->data_end;
|
||||
eth = data;
|
||||
|
||||
/* Re-establish packet bounds for verifier */
|
||||
if ((void *)(eth + 1) > data_end)
|
||||
return XDP_DROP;
|
||||
|
||||
nh_off = sizeof(*eth);
|
||||
|
||||
/* Skip VLAN header if present */
|
||||
if (eth->h_proto == bpf_htons(ETH_P_8021Q) ||
|
||||
eth->h_proto == bpf_htons(ETH_P_8021AD)) {
|
||||
nh_off += sizeof(struct vlan_hdr);
|
||||
}
|
||||
|
||||
/* Verify nh_off is within bounds */
|
||||
if ((void *)((char *)data + nh_off) > data_end)
|
||||
return XDP_DROP;
|
||||
|
||||
/* Decrease TTL/hop_limit */
|
||||
if (h_proto == bpf_htons(ETH_P_IP)) {
|
||||
struct iphdr *iph = (void *)((char *)data + nh_off);
|
||||
if ((void *)(iph + 1) > data_end)
|
||||
return XDP_DROP;
|
||||
ip_decrease_ttl(iph);
|
||||
} else if (h_proto == bpf_htons(ETH_P_IPV6)) {
|
||||
struct ipv6hdr *ip6h = (void *)((char *)data + nh_off);
|
||||
if ((void *)(ip6h + 1) > data_end)
|
||||
return XDP_DROP;
|
||||
ip6h->hop_limit--;
|
||||
}
|
||||
record_stats(ctx, &key, bytes);
|
||||
|
||||
/* Update MAC addresses - verify eth is still valid */
|
||||
if ((void *)(eth + 1) > data_end)
|
||||
return XDP_DROP;
|
||||
|
||||
__builtin_memcpy(eth->h_dest, fib_params.dmac, ETH_ALEN);
|
||||
__builtin_memcpy(eth->h_source, fib_params.smac, ETH_ALEN);
|
||||
if (h_proto == bpf_htons(ETH_P_IP))
|
||||
ip_decrease_ttl(iph);
|
||||
else if (h_proto == bpf_htons(ETH_P_IPV6))
|
||||
ip6h->hop_limit--;
|
||||
|
||||
return bpf_redirect(fib_params.ifindex, 0);
|
||||
}
|
||||
__builtin_memcpy(eth->h_dest, fib_params.dmac, ETH_ALEN);
|
||||
__builtin_memcpy(eth->h_source, fib_params.smac, ETH_ALEN);
|
||||
|
||||
return bpf_redirect_map(&xdp_l3fwd_ports, fib_params.ifindex, 0);
|
||||
}
|
||||
|
||||
return XDP_PASS;
|
||||
return XDP_PASS;
|
||||
}
|
||||
|
||||
SEC("xdp")
|
||||
int xdp_l3fwd_prog(struct xdp_md *ctx)
|
||||
{
|
||||
return xdp_l3fwd_flags(ctx, 0);
|
||||
return xdp_l3fwd_flags(ctx, 0);
|
||||
}
|
||||
|
||||
SEC("xdp")
|
||||
int xdp_l3fwd_direct_prog(struct xdp_md *ctx)
|
||||
{
|
||||
return xdp_l3fwd_flags(ctx, BPF_FIB_LOOKUP_DIRECT);
|
||||
return xdp_l3fwd_flags(ctx, BPF_FIB_LOOKUP_DIRECT);
|
||||
}
|
||||
|
||||
char _license[] SEC("license") = "GPL";
|
||||
char _license[] SEC("license") = "GPL";
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user