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// SPDX-License-Identifier: GPL-2.0
#include <test_progs.h>
#include "cgroup_helpers.h"
#include "network_helpers.h"
static int verify_ports(int family, int fd,
__u16 expected_local, __u16 expected_peer)
{
struct sockaddr_storage addr;
socklen_t len = sizeof(addr);
__u16 port;
if (getsockname(fd, (struct sockaddr *)&addr, &len)) {
log_err("Failed to get server addr");
return -1;
}
if (family == AF_INET)
port = ((struct sockaddr_in *)&addr)->sin_port;
else
port = ((struct sockaddr_in6 *)&addr)->sin6_port;
if (ntohs(port) != expected_local) {
log_err("Unexpected local port %d, expected %d", ntohs(port),
expected_local);
return -1;
}
if (getpeername(fd, (struct sockaddr *)&addr, &len)) {
log_err("Failed to get peer addr");
return -1;
}
if (family == AF_INET)
port = ((struct sockaddr_in *)&addr)->sin_port;
else
port = ((struct sockaddr_in6 *)&addr)->sin6_port;
if (ntohs(port) != expected_peer) {
log_err("Unexpected peer port %d, expected %d", ntohs(port),
expected_peer);
return -1;
}
return 0;
}
static int run_test(int cgroup_fd, int server_fd, int family, int type)
{
bool v4 = family == AF_INET;
__u16 expected_local_port = v4 ? 22222 : 22223;
__u16 expected_peer_port = 60000;
struct bpf_prog_load_attr attr = {
.file = v4 ? "./connect_force_port4.o" :
"./connect_force_port6.o",
};
struct bpf_program *prog;
struct bpf_object *obj;
int xlate_fd, fd, err;
__u32 duration = 0;
err = bpf_prog_load_xattr(&attr, &obj, &xlate_fd);
if (err) {
log_err("Failed to load BPF object");
return -1;
}
prog = bpf_object__find_program_by_title(obj, v4 ?
"cgroup/connect4" :
"cgroup/connect6");
if (CHECK(!prog, "find_prog", "connect prog not found\n")) {
err = -EIO;
goto close_bpf_object;
}
err = bpf_prog_attach(bpf_program__fd(prog), cgroup_fd, v4 ?
BPF_CGROUP_INET4_CONNECT :
BPF_CGROUP_INET6_CONNECT, 0);
if (err) {
log_err("Failed to attach BPF program");
goto close_bpf_object;
}
prog = bpf_object__find_program_by_title(obj, v4 ?
"cgroup/getpeername4" :
"cgroup/getpeername6");
if (CHECK(!prog, "find_prog", "getpeername prog not found\n")) {
err = -EIO;
goto close_bpf_object;
}
err = bpf_prog_attach(bpf_program__fd(prog), cgroup_fd, v4 ?
BPF_CGROUP_INET4_GETPEERNAME :
BPF_CGROUP_INET6_GETPEERNAME, 0);
if (err) {
log_err("Failed to attach BPF program");
goto close_bpf_object;
}
prog = bpf_object__find_program_by_title(obj, v4 ?
"cgroup/getsockname4" :
"cgroup/getsockname6");
if (CHECK(!prog, "find_prog", "getsockname prog not found\n")) {
err = -EIO;
goto close_bpf_object;
}
err = bpf_prog_attach(bpf_program__fd(prog), cgroup_fd, v4 ?
BPF_CGROUP_INET4_GETSOCKNAME :
BPF_CGROUP_INET6_GETSOCKNAME, 0);
if (err) {
log_err("Failed to attach BPF program");
goto close_bpf_object;
}
fd = connect_to_fd(family, type, server_fd);
if (fd < 0) {
err = -1;
goto close_bpf_object;
}
err = verify_ports(family, fd, expected_local_port,
expected_peer_port);
close(fd);
close_bpf_object:
bpf_object__close(obj);
return err;
}
void test_connect_force_port(void)
{
int server_fd, cgroup_fd;
cgroup_fd = test__join_cgroup("/connect_force_port");
if (CHECK_FAIL(cgroup_fd < 0))
return;
server_fd = start_server_with_port(AF_INET, SOCK_STREAM, 60123);
if (CHECK_FAIL(server_fd < 0))
goto close_cgroup_fd;
CHECK_FAIL(run_test(cgroup_fd, server_fd, AF_INET, SOCK_STREAM));
close(server_fd);
server_fd = start_server_with_port(AF_INET6, SOCK_STREAM, 60124);
if (CHECK_FAIL(server_fd < 0))
goto close_cgroup_fd;
CHECK_FAIL(run_test(cgroup_fd, server_fd, AF_INET6, SOCK_STREAM));
close(server_fd);
server_fd = start_server_with_port(AF_INET, SOCK_DGRAM, 60123);
if (CHECK_FAIL(server_fd < 0))
goto close_cgroup_fd;
CHECK_FAIL(run_test(cgroup_fd, server_fd, AF_INET, SOCK_DGRAM));
close(server_fd);
server_fd = start_server_with_port(AF_INET6, SOCK_DGRAM, 60124);
if (CHECK_FAIL(server_fd < 0))
goto close_cgroup_fd;
CHECK_FAIL(run_test(cgroup_fd, server_fd, AF_INET6, SOCK_DGRAM));
close(server_fd);
close_cgroup_fd:
close(cgroup_fd);
}
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