1 files changed, 84 insertions, 0 deletions
diff --git a/src/seastar/dpdk/lib/librte_ipsec/iph.h b/src/seastar/dpdk/lib/librte_ipsec/iph.h
new file mode 100644
index 000000000..58930cf18
--- /dev/null
+++ b/src/seastar/dpdk/lib/librte_ipsec/iph.h
@@ -0,0 +1,84 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2018 Intel Corporation
+ */
+
+#ifndef _IPH_H_
+#define _IPH_H_
+
+/**
+ * @file iph.h
+ * Contains functions/structures/macros to manipulate IPv4/IPv6 headers
+ * used internally by ipsec library.
+ */
+
+/*
+ * Move preceding (L3) headers down to remove ESP header and IV.
+ */
+static inline void
+remove_esph(char *np, char *op, uint32_t hlen)
+{
+	uint32_t i;
+
+	for (i = hlen; i-- != 0; np[i] = op[i])
+		;
+}
+
+/*
+ * Move preceding (L3) headers up to free space for ESP header and IV.
+ */
+static inline void
+insert_esph(char *np, char *op, uint32_t hlen)
+{
+	uint32_t i;
+
+	for (i = 0; i != hlen; i++)
+		np[i] = op[i];
+}
+
+/* update original ip header fields for transport case */
+static inline int
+update_trs_l3hdr(const struct rte_ipsec_sa *sa, void *p, uint32_t plen,
+		uint32_t l2len, uint32_t l3len, uint8_t proto)
+{
+	struct ipv4_hdr *v4h;
+	struct ipv6_hdr *v6h;
+	int32_t rc;
+
+	if ((sa->type & RTE_IPSEC_SATP_IPV_MASK) == RTE_IPSEC_SATP_IPV4) {
+		v4h = p;
+		rc = v4h->next_proto_id;
+		v4h->next_proto_id = proto;
+		v4h->total_length = rte_cpu_to_be_16(plen - l2len);
+	} else if (l3len == sizeof(*v6h)) {
+		v6h = p;
+		rc = v6h->proto;
+		v6h->proto = proto;
+		v6h->payload_len = rte_cpu_to_be_16(plen - l2len -
+				sizeof(*v6h));
+	/* need to add support for IPv6 with options */
+	} else
+		rc = -ENOTSUP;
+
+	return rc;
+}
+
+/* update original and new ip header fields for tunnel case */
+static inline void
+update_tun_l3hdr(const struct rte_ipsec_sa *sa, void *p, uint32_t plen,
+		uint32_t l2len, rte_be16_t pid)
+{
+	struct ipv4_hdr *v4h;
+	struct ipv6_hdr *v6h;
+
+	if (sa->type & RTE_IPSEC_SATP_MODE_TUNLV4) {
+		v4h = p;
+		v4h->packet_id = pid;
+		v4h->total_length = rte_cpu_to_be_16(plen - l2len);
+	} else {
+		v6h = p;
+		v6h->payload_len = rte_cpu_to_be_16(plen - l2len -
+				sizeof(*v6h));
+	}
+}
+
+#endif /* _IPH_H_ */