30 lines
743 B
C
30 lines
743 B
C
#include "common.h"
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char __license[] __section("license") = "MIT";
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typedef char custkey[48];
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struct {
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__uint(type, BPF_MAP_TYPE_HASH);
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__uint(max_entries, 2);
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__type(key, custkey);
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__type(value, uint32_t);
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} my_map __section(".maps");
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static void *(*bpf_map_lookup_elem)(void *map, const void *key) = (void *)1;
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static long (*bpf_map_update_elem)(void *map, const void *key, const void *value, uint64_t flags) = (void *)2;
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#define KEY "This string is allocated in the string section\n"
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__section("xdp") int filter() {
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uint32_t *value = bpf_map_lookup_elem(&my_map, KEY);
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if (value)
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(*value)++;
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else {
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uint32_t newValue = 1;
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bpf_map_update_elem(&my_map, KEY, &newValue, 0);
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}
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return 2;
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}
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