3 files changed, 200 insertions, 0 deletions

diff --git a/sys/compat/linuxkpi/common/include/linux/ip.h b/sys/compat/linuxkpi/common/include/linux/ip.h
new file mode 100644
index 000000000000..3507c6fe9b97
--- /dev/null
+++ b/sys/compat/linuxkpi/common/include/linux/ip.h
@@ -0,0 +1,74 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2020-2021 The FreeBSD Foundation
+ *
+ * This software was developed by Björn Zeeb under sponsorship from
+ * the FreeBSD Foundation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef	__LKPI_LINUX_IP_H
+#define	__LKPI_LINUX_IP_H
+
+#include <sys/types.h>
+
+#include <netinet/ip.h>
+#include <machine/in_cksum.h>
+
+#include <linux/skbuff.h>
+
+/* (u) unconfirmed structure field names; using FreeBSD's meanwhile. */
+struct iphdr {
+	uint8_t		ip_hl:4, ip_ver:4;	/* (u) */
+	uint8_t		ip_tos;			/* (u) */
+	uint16_t	ip_len;			/* (u) */
+	uint16_t	id;
+	uint16_t	ip_off;			/* (u) */
+	uint8_t		ip_ttl;			/* (u) */
+	uint8_t		protocol;
+	uint16_t	check;
+	uint32_t	saddr;
+	uint32_t	daddr;
+};
+
+static __inline struct iphdr *
+ip_hdr(struct sk_buff *skb)
+{
+
+	return (struct iphdr *)skb_network_header(skb);
+}
+
+static __inline void
+ip_send_check(struct iphdr *iph)
+{
+
+	/* Clear the checksum before computing! */
+	iph->check = 0;
+	/* An IPv4 header is the same everywhere even if names differ. */
+	iph->check = in_cksum_hdr((const void *)iph);
+}
+
+#endif	/* __LKPI_LINUX_IP_H */
diff --git a/sys/compat/linuxkpi/common/include/linux/tcp.h b/sys/compat/linuxkpi/common/include/linux/tcp.h
new file mode 100644
index 000000000000..1197f38b7898
--- /dev/null
+++ b/sys/compat/linuxkpi/common/include/linux/tcp.h
@@ -0,0 +1,72 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2020-2021 The FreeBSD Foundation
+ *
+ * This software was developed by Björn Zeeb under sponsorship from
+ * the FreeBSD Foundation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef	__LKPI_LINUX_TCP_H
+#define	__LKPI_LINUX_TCP_H
+
+#include <sys/types.h>
+#include <linux/skbuff.h>
+
+/* (u) unconfirmed structure field names; using FreeBSD's meanwhile. */
+struct tcphdr {
+	uint16_t	source;			/* (u) */
+	uint16_t	dest;			/* (u) */
+	uint32_t	th_seq;			/* (u) */
+	uint32_t	th_ack;			/* (u) */
+#if BYTE_ORDER == LITTLE_ENDIAN
+	uint8_t		th_x2:4, doff:4;
+#elif BYTE_ORDER == BIG_ENDIAN
+	uint8_t		doff:4, th_x2:4;
+#endif
+	uint8_t		th_flags;		/* (u) */
+	uint16_t	th_win;			/* (u) */
+	uint16_t	check;
+	uint16_t	th_urg;			/* (u) */
+};
+
+static __inline struct tcphdr *
+tcp_hdr(struct sk_buff *skb)
+{
+
+	return (struct tcphdr *)skb_transport_header(skb);
+}
+
+static __inline uint32_t
+tcp_hdrlen(struct sk_buff *skb)
+{
+	struct tcphdr *th;
+
+	th = tcp_hdr(skb);
+	return (4 * th->doff);
+}
+
+#endif	/* __LKPI_LINUX_TCP_H */
diff --git a/sys/compat/linuxkpi/common/include/linux/udp.h b/sys/compat/linuxkpi/common/include/linux/udp.h
new file mode 100644
index 000000000000..259bdbfc1199
--- /dev/null
+++ b/sys/compat/linuxkpi/common/include/linux/udp.h
@@ -0,0 +1,54 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2020-2021 The FreeBSD Foundation
+ *
+ * This software was developed by Björn Zeeb under sponsorship from
+ * the FreeBSD Foundation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef	__LKPI_LINUX_UDP_H
+#define	__LKPI_LINUX_UDP_H
+
+#include <sys/types.h>
+#include <linux/skbuff.h>
+
+/* (u) unconfirmed structure field names. */
+struct udphdr {
+	uint16_t	source;		/* (u) */
+	uint16_t	dest;
+	uint16_t	len;		/* (u) */
+	uint16_t	check;
+};
+
+static __inline struct udphdr *
+udp_hdr(struct sk_buff *skb)
+{
+
+	return (struct udphdr *)skb_transport_header(skb);
+}
+
+#endif	/* __LKPI_LINUX_UDP_H */