Imported Upstream version 16.04

[deb_dpdk.git] / examples / ipsec-secgw / ipip.h

diff --git a/examples/ipsec-secgw/ipip.h b/examples/ipsec-secgw/ipip.h
new file mode 100644 (file)
index 0000000..322076c
--- /dev/null
+++ b/examples/ipsec-secgw/ipip.h
@@ -0,0 +1,103 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2016 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * 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.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT
+ *   OWNER 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.
+ */
+
+#ifndef __IPIP_H__
+#define __IPIP_H__
+
+#include <stdint.h>
+#include <netinet/in.h>
+#include <netinet/ip.h>
+
+#include <rte_mbuf.h>
+
+#define IPV6_VERSION (6)
+
+static inline  struct ip *
+ip4ip_outbound(struct rte_mbuf *m, uint32_t offset, uint32_t src, uint32_t dst)
+{
+       struct ip *inip, *outip;
+
+       inip = rte_pktmbuf_mtod(m, struct ip*);
+
+       IPSEC_ASSERT(inip->ip_v == IPVERSION || inip->ip_v == IPV6_VERSION);
+
+       offset += sizeof(struct ip);
+
+       outip = (struct ip *)rte_pktmbuf_prepend(m, offset);
+
+       IPSEC_ASSERT(outip != NULL);
+
+       /* Per RFC4301 5.1.2.1 */
+       outip->ip_v = IPVERSION;
+       outip->ip_hl = 5;
+       outip->ip_tos = inip->ip_tos;
+       outip->ip_len = htons(rte_pktmbuf_data_len(m));
+
+       outip->ip_id = 0;
+       outip->ip_off = 0;
+
+       outip->ip_ttl = IPDEFTTL;
+       outip->ip_p = IPPROTO_ESP;
+
+       outip->ip_src.s_addr = src;
+       outip->ip_dst.s_addr = dst;
+
+       return outip;
+}
+
+static inline int
+ip4ip_inbound(struct rte_mbuf *m, uint32_t offset)
+{
+       struct ip *inip;
+       struct ip *outip;
+
+       outip = rte_pktmbuf_mtod(m, struct ip*);
+
+       IPSEC_ASSERT(outip->ip_v == IPVERSION);
+
+       offset += sizeof(struct ip);
+       inip = (struct ip *)rte_pktmbuf_adj(m, offset);
+       IPSEC_ASSERT(inip->ip_v == IPVERSION || inip->ip_v == IPV6_VERSION);
+
+       /* Check packet is still bigger than IP header (inner) */
+       IPSEC_ASSERT(rte_pktmbuf_pkt_len(m) > sizeof(struct ip));
+
+       /* RFC4301 5.1.2.1 Note 6 */
+       if ((inip->ip_tos & htons(IPTOS_ECN_ECT0 | IPTOS_ECN_ECT1)) &&
+                       ((outip->ip_tos & htons(IPTOS_ECN_CE)) == IPTOS_ECN_CE))
+               inip->ip_tos |= htons(IPTOS_ECN_CE);
+
+       return 0;
+}
+
+#endif /* __IPIP_H__ */