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/*
// 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.
*/
#include "defines.h"
#include "hash_entry_types.h"
#include "mpls.h"
#include "prefetch.h"
#include "task_base.h"
#include "tx_pkt.h"
#include "task_init.h"
#include "prox_port_cfg.h"
#include "prox_cksum.h"
#include "thread_generic.h"
#include "prefetch.h"
#include "prox_assert.h"
#include "etypes.h"
#include "log.h"
#include "mbuf_utils.h"
struct task_unmpls {
struct task_base base;
uint8_t n_tags;
};
static void init_task_unmpls(__attribute__((unused)) struct task_base *tbase,
__attribute__((unused)) struct task_args *targ)
{
}
static inline uint8_t handle_unmpls(__attribute__((unused)) struct task_unmpls *task, struct rte_mbuf *mbuf)
{
struct ether_hdr *peth = rte_pktmbuf_mtod(mbuf, struct ether_hdr *);
struct mpls_hdr *mpls = (struct mpls_hdr *)(peth + 1);
uint32_t mpls_len = sizeof(struct mpls_hdr);
while (!(mpls->bytes & 0x00010000)) {
mpls++;
mpls_len += sizeof(struct mpls_hdr);
}
uint32_t tot_eth_addr_len = 2*sizeof(struct ether_addr);
rte_memcpy(((uint8_t *)peth) + mpls_len, peth, tot_eth_addr_len);
struct ipv4_hdr *ip = (struct ipv4_hdr *)(mpls + 1);
switch (ip->version_ihl >> 4) {
case 4:
peth = (struct ether_hdr *)rte_pktmbuf_adj(mbuf, mpls_len);
peth->ether_type = ETYPE_IPv4;
return 0;
case 6:
peth = (struct ether_hdr *)rte_pktmbuf_adj(mbuf, mpls_len);
peth->ether_type = ETYPE_IPv6;
return 0;
default:
plog_warn("Failed Decoding MPLS Packet - neither IPv4 nor IPv6: version %u\n", ip->version_ihl);
return OUT_DISCARD;
}
}
static int handle_unmpls_bulk(struct task_base *tbase, struct rte_mbuf **mbufs, uint16_t n_pkts)
{
struct task_unmpls *task = (struct task_unmpls *)tbase;
uint8_t out[MAX_PKT_BURST];
uint16_t j;
prefetch_first(mbufs, n_pkts);
for (j = 0; j + PREFETCH_OFFSET < n_pkts; ++j) {
#ifdef PROX_PREFETCH_OFFSET
PREFETCH0(mbufs[j + PREFETCH_OFFSET]);
PREFETCH0(rte_pktmbuf_mtod(mbufs[j + PREFETCH_OFFSET - 1], void *));
#endif
out[j] = handle_unmpls(task, mbufs[j]);
}
#ifdef PROX_PREFETCH_OFFSET
PREFETCH0(rte_pktmbuf_mtod(mbufs[n_pkts - 1], void *));
for (; j < n_pkts; ++j) {
out[j] = handle_unmpls(task, mbufs[j]);
}
#endif
return task->base.tx_pkt(&task->base, mbufs, n_pkts, out);
}
static struct task_init task_init_unmpls = {
.mode_str = "unmpls",
.init = init_task_unmpls,
.handle = handle_unmpls_bulk,
.thread_x = thread_generic,
.size = sizeof(struct task_unmpls)
};
struct task_tagmpls {
struct task_base base;
uint8_t n_tags;
};
static void init_task_tagmpls(__attribute__((unused)) struct task_base *tbase,
__attribute__((unused)) struct task_args *targ)
{
}
static inline uint8_t handle_tagmpls(__attribute__((unused)) struct task_tagmpls *task, struct rte_mbuf *mbuf)
{
struct ether_hdr *peth = (struct ether_hdr *)rte_pktmbuf_prepend(mbuf, 4);
PROX_ASSERT(peth);
rte_prefetch0(peth);
uint32_t mpls = 0;
uint32_t tot_eth_addr_len = 2*sizeof(struct ether_addr);
rte_memcpy(peth, ((uint8_t *)peth) + sizeof(struct mpls_hdr), tot_eth_addr_len);
*((uint32_t *)(peth + 1)) = mpls | 0x00010000; // Set BoS to 1
peth->ether_type = ETYPE_MPLSU;
return 0;
}
static int handle_tagmpls_bulk(struct task_base *tbase, struct rte_mbuf **mbufs, uint16_t n_pkts)
{
struct task_tagmpls *task = (struct task_tagmpls *)tbase;
uint8_t out[MAX_PKT_BURST];
uint16_t j;
prefetch_first(mbufs, n_pkts);
for (j = 0; j + PREFETCH_OFFSET < n_pkts; ++j) {
#ifdef PROX_PREFETCH_OFFSET
PREFETCH0(mbufs[j + PREFETCH_OFFSET]);
PREFETCH0(rte_pktmbuf_mtod(mbufs[j + PREFETCH_OFFSET - 1], void *));
#endif
out[j] = handle_tagmpls(task, mbufs[j]);
}
#ifdef PROX_PREFETCH_OFFSET
PREFETCH0(rte_pktmbuf_mtod(mbufs[n_pkts - 1], void *));
for (; j < n_pkts; ++j) {
out[j] = handle_tagmpls(task, mbufs[j]);
}
#endif
return task->base.tx_pkt(&task->base, mbufs, n_pkts, out);
}
static struct task_init task_init_tagmpls = {
.mode_str = "tagmpls",
.init = init_task_tagmpls,
.handle = handle_tagmpls_bulk,
.size = sizeof(struct task_tagmpls)
};
__attribute__((constructor)) static void reg_task_mplstag(void)
{
reg_task(&task_init_unmpls);
reg_task(&task_init_tagmpls);
}
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