linux/samples/bpf/test_probe_write_user_user.c
Jakub Kicinski 2bf3e2ef42 samples: bpf: include bpf/bpf.h instead of local libbpf.h
There are two files in the tree called libbpf.h which is becoming
problematic.  Most samples don't actually need the local libbpf.h
they simply include it to get to bpf/bpf.h.  Include bpf/bpf.h
directly instead.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2018-05-14 22:52:10 -07:00

80 lines
2.5 KiB
C

// SPDX-License-Identifier: GPL-2.0
#include <stdio.h>
#include <assert.h>
#include <linux/bpf.h>
#include <unistd.h>
#include <bpf/bpf.h>
#include "bpf_load.h"
#include <sys/socket.h>
#include <string.h>
#include <netinet/in.h>
#include <arpa/inet.h>
int main(int ac, char **argv)
{
int serverfd, serverconnfd, clientfd;
socklen_t sockaddr_len;
struct sockaddr serv_addr, mapped_addr, tmp_addr;
struct sockaddr_in *serv_addr_in, *mapped_addr_in, *tmp_addr_in;
char filename[256];
char *ip;
serv_addr_in = (struct sockaddr_in *)&serv_addr;
mapped_addr_in = (struct sockaddr_in *)&mapped_addr;
tmp_addr_in = (struct sockaddr_in *)&tmp_addr;
snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
if (load_bpf_file(filename)) {
printf("%s", bpf_log_buf);
return 1;
}
assert((serverfd = socket(AF_INET, SOCK_STREAM, 0)) > 0);
assert((clientfd = socket(AF_INET, SOCK_STREAM, 0)) > 0);
/* Bind server to ephemeral port on lo */
memset(&serv_addr, 0, sizeof(serv_addr));
serv_addr_in->sin_family = AF_INET;
serv_addr_in->sin_port = 0;
serv_addr_in->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
assert(bind(serverfd, &serv_addr, sizeof(serv_addr)) == 0);
sockaddr_len = sizeof(serv_addr);
assert(getsockname(serverfd, &serv_addr, &sockaddr_len) == 0);
ip = inet_ntoa(serv_addr_in->sin_addr);
printf("Server bound to: %s:%d\n", ip, ntohs(serv_addr_in->sin_port));
memset(&mapped_addr, 0, sizeof(mapped_addr));
mapped_addr_in->sin_family = AF_INET;
mapped_addr_in->sin_port = htons(5555);
mapped_addr_in->sin_addr.s_addr = inet_addr("255.255.255.255");
assert(!bpf_map_update_elem(map_fd[0], &mapped_addr, &serv_addr, BPF_ANY));
assert(listen(serverfd, 5) == 0);
ip = inet_ntoa(mapped_addr_in->sin_addr);
printf("Client connecting to: %s:%d\n",
ip, ntohs(mapped_addr_in->sin_port));
assert(connect(clientfd, &mapped_addr, sizeof(mapped_addr)) == 0);
sockaddr_len = sizeof(tmp_addr);
ip = inet_ntoa(tmp_addr_in->sin_addr);
assert((serverconnfd = accept(serverfd, &tmp_addr, &sockaddr_len)) > 0);
printf("Server received connection from: %s:%d\n",
ip, ntohs(tmp_addr_in->sin_port));
sockaddr_len = sizeof(tmp_addr);
assert(getpeername(clientfd, &tmp_addr, &sockaddr_len) == 0);
ip = inet_ntoa(tmp_addr_in->sin_addr);
printf("Client's peer address: %s:%d\n",
ip, ntohs(tmp_addr_in->sin_port));
/* Is the server's getsockname = the socket getpeername */
assert(memcmp(&serv_addr, &tmp_addr, sizeof(struct sockaddr_in)) == 0);
return 0;
}