static inline int evaluateByLookUp()

in pkg/ebpf/c/tc.v4egress.bpf.c [96:132]
33 lines of code
11 McCabe index (conditional complexity)

static inline int evaluateByLookUp(struct keystruct trie_key, struct conntrack_key flow_key, struct pod_state *pst, struct data_t evt, struct iphdr *ip, __u32 l4_dst_port) {
	struct lpm_trie_val *trie_val;
	//Check if it's in the allowed list
	trie_val = bpf_map_lookup_elem(&egress_map, &trie_key);
	if (trie_val == NULL) {
		evt.verdict = 0;
		bpf_ringbuf_output(&policy_events, &evt, sizeof(evt), 0);
		return BPF_DROP;
	}

	for (int i = 0; i < MAX_PORT_PROTOCOL; i++, trie_val++){
		if (trie_val->protocol == RESERVED_IP_PROTOCOL) {
			evt.verdict = 0;
			bpf_ringbuf_output(&policy_events, &evt, sizeof(evt), 0);
			return BPF_DROP;
		}

		if ((trie_val->protocol == ANY_IP_PROTOCOL) || (trie_val->protocol == ip->protocol &&
					((trie_val->start_port == ANY_PORT) || (l4_dst_port == trie_val->start_port) ||
						(l4_dst_port > trie_val->start_port && l4_dst_port <= trie_val->end_port)))) {
			//Inject in to conntrack map
			struct conntrack_value new_flow_val = {};
			if (pst->state == DEFAULT_ALLOW) {
				new_flow_val.val = CT_VAL_DEFAULT_ALLOW;
			} else {
				new_flow_val.val = CT_VAL_POLICIES_APPLIED;
			}
			bpf_map_update_elem(&aws_conntrack_map, &flow_key, &new_flow_val, 0); // 0 - BPF_ANY
			evt.verdict = 1;
			bpf_ringbuf_output(&policy_events, &evt, sizeof(evt), 0);
			return BPF_OK;
		}
	}
	evt.verdict = 0;
	bpf_ringbuf_output(&policy_events, &evt, sizeof(evt), 0);
	return BPF_DROP;
}