+#ifdef RATE_CNT
+struct ratelimit {
+ struct bpf_spin_lock lock;
+ union {
+ int64_t sent_bytes;
+ int64_t sent_packets;
+ } rate;
+ int64_t sent_time;
+};
+struct {
+ __uint(type, BPF_MAP_TYPE_ARRAY);
+ __uint(max_entries, RATE_CNT);
+ __u32 *key;
+ struct ratelimit *value;
+} rate_map SEC(".maps");
+#endif /* RATE_CNT */
+
+// For per-source rate limiting, we have to use per-CPU hash maps as Linux
+// doesn't support spinlocks inside of a LRU_HASH (see if block in
+// map_check_btf as of Linux 5.10).
+// This isn't exactly accurate, but at least its faster.
+struct percpu_ratelimit {
+ union {
+ int64_t sent_bytes;
+ int64_t sent_packets;
+ } rate;
+ int64_t sent_time;
+};
+
+#define V6_SRC_RATE_DEFINE(n, limit) \
+struct { \
+ __uint(type, BPF_MAP_TYPE_LRU_PERCPU_HASH); \
+ __uint(max_entries, limit); \
+ uint128_t *key; \
+ struct percpu_ratelimit *value; \
+} v6_src_rate_##n SEC(".maps");
+
+#define V4_SRC_RATE_DEFINE(n, limit) \
+struct { \
+ __uint(type, BPF_MAP_TYPE_LRU_PERCPU_HASH); \
+ __uint(max_entries, limit); \
+ __u32 *key; \
+ struct percpu_ratelimit *value; \
+} v4_src_rate_##n SEC(".maps");
+
+#include "maps.h"
+
+#ifndef HAVE_WRAPPER // Set this to call xdp_drop externally