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authorDeepak S <deepak.s@linux.intel.com>2017-07-13 21:26:50 -0700
committerDeepak S <deepak.s@linux.intel.com>2017-07-14 04:58:47 -0700
commit7286b2518ec8e4398b512ce95def9166a7af2e4a (patch)
treec93ef65d9e73e8893ccecb720152e16aae96a8b6 /VNFs/DPPD-PROX/arp.h
parentadcb79da90176b27224eeb1d00aa0e611ef85a9b (diff)
Adding PROX(Packet pROcessing eXecution engine) VNF to sampleVNF
JIRA: SAMPLEVNF-55 PROX is a DPDK-based application implementing Telco use-cases such as a simplified BRAS/BNG, light-weight AFTR... It also allows configuring finer grained network functions like QoS, Routing, load-balancing... (We are moving PROX version v039 to sampleVNF https://01.org/intel-data-plane-performance-demonstrators/prox-overview) Change-Id: Ia3cb02cf0e49ac5596e922c197ff7e010293d033 Signed-off-by: Deepak S <deepak.s@linux.intel.com>
Diffstat (limited to 'VNFs/DPPD-PROX/arp.h')
-rw-r--r--VNFs/DPPD-PROX/arp.h72
1 files changed, 72 insertions, 0 deletions
diff --git a/VNFs/DPPD-PROX/arp.h b/VNFs/DPPD-PROX/arp.h
new file mode 100644
index 0000000..279bdad
--- /dev/null
+++ b/VNFs/DPPD-PROX/arp.h
@@ -0,0 +1,72 @@
+/*
+// Copyright (c) 2010-2017 Intel Corporation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+*/
+
+#ifndef _ARP_H_
+#define _ARP_H_
+
+#include <rte_ether.h>
+
+#define ARP_REQUEST 0x100
+#define ARP_REPLY 0x200
+
+struct _arp_ipv4 {
+ struct ether_addr sha; /* Sender hardware address */
+ uint32_t spa; /* Sender protocol address */
+ struct ether_addr tha; /* Target hardware address */
+ uint32_t tpa; /* Target protocol address */
+} __attribute__((__packed__));
+typedef struct _arp_ipv4 arp_ipv4_t;
+
+struct my_arp_t {
+ uint16_t htype;
+ uint16_t ptype;
+ uint8_t hlen;
+ uint8_t plen;
+ uint16_t oper;
+ arp_ipv4_t data;
+} __attribute__((__packed__));
+
+struct ether_hdr_arp {
+ struct ether_hdr ether_hdr;
+ struct my_arp_t arp;
+};
+
+static int arp_is_gratuitous(struct ether_hdr_arp *hdr)
+{
+ return hdr->arp.data.spa == hdr->arp.data.tpa;
+}
+
+static inline void prepare_arp_reply(struct ether_hdr_arp *hdr_arp, struct ether_addr *s_addr)
+{
+ uint32_t ip_source = hdr_arp->arp.data.spa;
+
+ hdr_arp->arp.data.spa = hdr_arp->arp.data.tpa;
+ hdr_arp->arp.data.tpa = ip_source;
+ hdr_arp->arp.oper = 0x200;
+ memcpy(&hdr_arp->arp.data.tha, &hdr_arp->arp.data.sha, sizeof(struct ether_addr));
+ memcpy(&hdr_arp->arp.data.sha, s_addr, sizeof(struct ether_addr));
+}
+
+static void create_mac(struct ether_hdr_arp *hdr, struct ether_addr *addr)
+{
+ addr->addr_bytes[0] = 0x2;
+ addr->addr_bytes[1] = 0;
+ // Instead of sending a completely random MAC address, create the following MAC:
+ // 02:00:x1:x2:x3:x4 where x1:x2:x3:x4 is the IP address
+ memcpy(addr->addr_bytes + 2, (uint32_t *)&hdr->arp.data.tpa, 4);
+}
+
+#endif /* _ARP_H_ */