- accessor = "rate->rate.sent_packets"
- # Note that int64_t will overflow after 292 years of uptime
- first_action = "int64_t time = bpf_ktime_get_ns();\n"
- first_action += f"const uint32_t ratelimitidx = {ratelimitcnt};\n"
- first_action += "uint64_t allowed_since_last = 0;\n"
- first_action += "struct ratelimit *rate = bpf_map_lookup_elem(&rate_map, &ratelimitidx);\n"
- first_action += "if (rate) {\n"
- first_action += "\tbpf_spin_lock(&rate->lock);\n"
- first_action += f"\tif (likely({accessor} > 0))" + " {\n"
- first_action += "\t\tint64_t diff = time - rate->sent_time;\n"
- # Unlikely or not, if the flow is slow, take a perf hit (though with the else if branch it doesn't matter)
- first_action += "\t\tif (unlikely(diff > 1000000000))\n"
- first_action += f"\t\t\t{accessor} = 0;\n"
- first_action += "\t\telse if (likely(diff > 0))\n"
- first_action += f"\t\t\tallowed_since_last = ((uint64_t)diff) * {math.floor(value)} / 1000000000;\n"
- first_action += "\t}\n"
- first_action += f"\tif ({accessor} - ((int64_t)allowed_since_last) <= 0)" + " {\n"
- if ty == "0x8006":
- first_action += f"\t\t{accessor} = data_end - pktdata;\n"
+ spin_lock = "/* No locking as we're locked in get_v*_persrc_ratelimit */"
+ spin_unlock = "bpf_spin_unlock(rate_ptr.lock);"
+ if proto == 4:
+ if mid_byte > 32:
+ continue
+ first_action += f"const uint32_t srcip = ip->saddr & MASK4({mid_byte});\n"
+ first_action += f"void *rate_map = &v4_src_rate_{len(v4persrcratelimits)};\n"
+ first_action += f"struct persrc_rate4_ptr rate_ptr = get_v4_persrc_ratelimit(srcip, rate_map, {(high_byte + 1) * 4096}, time_masked);\n"
+ first_action += f"struct persrc_rate4_entry *rate = rate_ptr.rate;\n"
+ v4persrcratelimits.append((high_byte + 1) * 4096)
+ elif mid_byte <= 64:
+ first_action += f"const uint64_t srcip = BE128BEHIGH64(ip6->saddr & MASK6({mid_byte}));\n"
+ first_action += f"void *rate_map = &v5_src_rate_{len(v5persrcratelimits)};\n"
+ first_action += f"struct persrc_rate5_ptr rate_ptr = get_v5_persrc_ratelimit(srcip, rate_map, {(high_byte + 1) * 4096}, time_masked);\n"
+ first_action += f"struct persrc_rate5_entry *rate = rate_ptr.rate;\n"
+ v5persrcratelimits.append((high_byte + 1) * 4096)
+ else:
+ if mid_byte > 128:
+ continue
+ first_action += f"const uint128_t srcip = ip6->saddr & MASK6({mid_byte});\n"
+ first_action += f"void *rate_map = &v6_src_rate_{len(v6persrcratelimits)};\n"
+ first_action += f"struct persrc_rate6_ptr rate_ptr = get_v6_persrc_ratelimit(srcip, rate_map, {(high_byte + 1) * 4096}, time_masked);\n"
+ first_action += f"struct persrc_rate6_entry *rate = rate_ptr.rate;\n"
+ v6persrcratelimits.append((high_byte + 1) * 4096)
+ if ty == "0x8006" or ty == "0x8306":
+ first_action += "uint64_t amt = data_end - pktdata;\n"