162306a36Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0 262306a36Sopenharmony_ci 362306a36Sopenharmony_ci#include <string.h> 462306a36Sopenharmony_ci 562306a36Sopenharmony_ci#include <linux/stddef.h> 662306a36Sopenharmony_ci#include <linux/bpf.h> 762306a36Sopenharmony_ci 862306a36Sopenharmony_ci#include <sys/socket.h> 962306a36Sopenharmony_ci 1062306a36Sopenharmony_ci#include <bpf/bpf_helpers.h> 1162306a36Sopenharmony_ci#include <bpf/bpf_endian.h> 1262306a36Sopenharmony_ci 1362306a36Sopenharmony_ci#define VERDICT_REJECT 0 1462306a36Sopenharmony_ci#define VERDICT_PROCEED 1 1562306a36Sopenharmony_ci 1662306a36Sopenharmony_ciSEC("cgroup/connect4") 1762306a36Sopenharmony_ciint connect_v4_dropper(struct bpf_sock_addr *ctx) 1862306a36Sopenharmony_ci{ 1962306a36Sopenharmony_ci if (ctx->type != SOCK_STREAM) 2062306a36Sopenharmony_ci return VERDICT_PROCEED; 2162306a36Sopenharmony_ci if (ctx->user_port == bpf_htons(60120)) 2262306a36Sopenharmony_ci return VERDICT_REJECT; 2362306a36Sopenharmony_ci return VERDICT_PROCEED; 2462306a36Sopenharmony_ci} 2562306a36Sopenharmony_ci 2662306a36Sopenharmony_cichar _license[] SEC("license") = "GPL"; 27