sockex2_user.c 1.12 KB
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// SPDX-License-Identifier: GPL-2.0
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#include <stdio.h>
#include <assert.h>
#include <linux/bpf.h>
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#include <bpf/bpf.h>
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#include "bpf_load.h"
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#include "sock_example.h"
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#include <unistd.h>
#include <arpa/inet.h>
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#include <sys/resource.h>
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struct pair {
	__u64 packets;
	__u64 bytes;
};

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int main(int ac, char **argv)
{
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	struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};
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	char filename[256];
	FILE *f;
	int i, sock;

	snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
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	setrlimit(RLIMIT_MEMLOCK, &r);
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	if (load_bpf_file(filename)) {
		printf("%s", bpf_log_buf);
		return 1;
	}

	sock = open_raw_sock("lo");

	assert(setsockopt(sock, SOL_SOCKET, SO_ATTACH_BPF, prog_fd,
			  sizeof(prog_fd[0])) == 0);

	f = popen("ping -c5 localhost", "r");
	(void) f;

	for (i = 0; i < 5; i++) {
		int key = 0, next_key;
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		struct pair value;
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		while (bpf_map_get_next_key(map_fd[0], &key, &next_key) == 0) {
			bpf_map_lookup_elem(map_fd[0], &next_key, &value);
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			printf("ip %s bytes %lld packets %lld\n",
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			       inet_ntoa((struct in_addr){htonl(next_key)}),
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			       value.bytes, value.packets);
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			key = next_key;
		}
		sleep(1);
	}
	return 0;
}