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cc9864a7aa
Remove unused len variable, which causes compilation warnings. Signed-off-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Martin KaFai Lau <kafai@fb.com> Link: https://lore.kernel.org/bpf/20200314001834.3727680-1-andriin@fb.com
37 lines
804 B
C
37 lines
804 B
C
#include <linux/bpf.h>
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#include <bpf/bpf_helpers.h>
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#include <bpf/bpf_endian.h>
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int _version SEC("version") = 1;
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SEC("sk_skb1")
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int bpf_prog1(struct __sk_buff *skb)
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{
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void *data_end = (void *)(long) skb->data_end;
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void *data = (void *)(long) skb->data;
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__u32 lport = skb->local_port;
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__u32 rport = skb->remote_port;
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__u8 *d = data;
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int err;
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if (data + 10 > data_end) {
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err = bpf_skb_pull_data(skb, 10);
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if (err)
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return SK_DROP;
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data_end = (void *)(long)skb->data_end;
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data = (void *)(long)skb->data;
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if (data + 10 > data_end)
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return SK_DROP;
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}
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/* This write/read is a bit pointless but tests the verifier and
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* strparser handler for read/write pkt data and access into sk
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* fields.
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*/
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d = data;
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d[7] = 1;
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return skb->len;
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}
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char _license[] SEC("license") = "GPL";
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