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2024-05-10 748e4f3d702def1a4bff191e0cf93b6a05340f01

 kernel/include/net/esp.h
..
..
@@ -11,6 +11,22 @@
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 	return (struct ip_esp_hdr *)skb_transport_header(skb);
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 }
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+static inline void esp_output_fill_trailer(u8 *tail, int tfclen, int plen, __u8 proto)
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+{
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+	/* Fill padding... */
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+	if (tfclen) {
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+		memset(tail, 0, tfclen);
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+		tail += tfclen;
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+	}
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+	do {
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+		int i;
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+		for (i = 0; i < plen - 2; i++)
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+			tail[i] = i + 1;
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+	} while (0);
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+	tail[plen - 2] = plen - 2;
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+	tail[plen - 1] = proto;
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+}
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+
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 struct esp_info {
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 	struct	ip_esp_hdr *esph;
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 	__be64	seqno;