27 lines
528 B
C
27 lines
528 B
C
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// SPDX-License-Identifier: GPL-2.0
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#include <linux/ptrace.h>
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#include <linux/bpf.h>
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#include <netinet/in.h>
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#include "bpf_helpers.h"
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#include "bpf_tracing.h"
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static struct sockaddr_in old;
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SEC("kprobe/__sys_connect")
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int handle_sys_connect(struct pt_regs *ctx)
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{
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void *ptr = (void *)PT_REGS_PARM2(ctx);
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struct sockaddr_in new;
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bpf_probe_read_user(&old, sizeof(old), ptr);
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__builtin_memset(&new, 0xab, sizeof(new));
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bpf_probe_write_user(ptr, &new, sizeof(new));
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return 0;
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}
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char _license[] SEC("license") = "GPL";
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