| // 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; | |
| } |