ddba122428
Implement a new test program mptcpify: if the family is AF_INET or AF_INET6, the type is SOCK_STREAM, and the protocol ID is 0 or IPPROTO_TCP, set it to IPPROTO_MPTCP. It will be hooked in update_socket_protocol(). Extend the MPTCP test base, add a selftest test_mptcpify() for the mptcpify case. Open and load the mptcpify test prog to mptcpify the TCP sockets dynamically, then use start_server() and connect_to_fd() to create a TCP socket, but actually what's created is an MPTCP socket, which can be verified through 'getsockopt(SOL_PROTOCOL)' and 'getsockopt(MPTCP_INFO)'. Acked-by: Yonghong Song <yonghong.song@linux.dev> Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net> Signed-off-by: Geliang Tang <geliang.tang@suse.com> Link: https://lore.kernel.org/r/364e72f307e7bb38382ec7442c182d76298a9c41.1692147782.git.geliang.tang@suse.com Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
20 lines
463 B
C
20 lines
463 B
C
// SPDX-License-Identifier: GPL-2.0
|
|
/* Copyright (c) 2023, SUSE. */
|
|
|
|
#include "vmlinux.h"
|
|
#include <bpf/bpf_tracing.h>
|
|
#include "bpf_tracing_net.h"
|
|
|
|
char _license[] SEC("license") = "GPL";
|
|
|
|
SEC("fmod_ret/update_socket_protocol")
|
|
int BPF_PROG(mptcpify, int family, int type, int protocol)
|
|
{
|
|
if ((family == AF_INET || family == AF_INET6) &&
|
|
type == SOCK_STREAM &&
|
|
(!protocol || protocol == IPPROTO_TCP)) {
|
|
return IPPROTO_MPTCP;
|
|
}
|
|
|
|
return protocol;
|
|
}
|