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/*
// Copyright (c) 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.
*/
/*
* Filename - l2_proto.c
* L2 Protocol Handler
*/
#include "l2_proto.h"
static struct proto_packet_type *proto_list[3];
/*
* Function to register the rx functions for different ethertypes. This is maintained in a list.
*/
void
list_add_type(uint16_t type,
void (*func) (struct rte_mbuf **, uint16_t, uint64_t,
l2_phy_interface_t *))
{
if (type == ETHER_TYPE_IPv4) {
proto_list[IPv4_VAL] =
rte_malloc(NULL, sizeof(struct proto_packet_type),
RTE_CACHE_LINE_SIZE);
proto_list[IPv4_VAL]->type = type;
proto_list[IPv4_VAL]->func = func;
}
else if (type == ETHER_TYPE_ARP) {
proto_list[ARP_VAL] =
rte_malloc(NULL, sizeof(struct proto_packet_type),
RTE_CACHE_LINE_SIZE);
proto_list[ARP_VAL]->type = type;
proto_list[ARP_VAL]->func = func;
} else if (type == ETHER_TYPE_IPv6) {
proto_list[IPv6_VAL] =
rte_malloc(NULL, sizeof(struct proto_packet_type),
RTE_CACHE_LINE_SIZE);
proto_list[IPv6_VAL]->type = type;
proto_list[IPv6_VAL]->func = func;
}
}
/*
* Check the mac address to see whether it is destined to this host or not.
* Call relevant functions registered by other modules when the ethertype matches,
* if it is destined to this host. Drop the packet otherwise.
*/
void
l2_check_mac(struct rte_mbuf *m[IFM_BURST_SIZE], l2_phy_interface_t *port,
uint8_t i, uint64_t *pkts_mask, uint64_t *arp_pkts_mask,
uint64_t *ipv4_pkts_mask, uint64_t *ipv6_pkts_mask)
{
struct ether_hdr *eth=NULL;
uint16_t same_mac=0;
uint16_t ethtype = 0;
if (m[i] != NULL) {
eth = rte_pktmbuf_mtod(m[i], struct ether_hdr *);
if(eth)
ethtype = rte_be_to_cpu_16(eth->ether_type);
if (eth == NULL) {
/*Destination MAC address inside the packet */
printf("l2_check_mac: Ethernet Dest Addr NULL !!!\n");
return;
}
ethtype = rte_be_to_cpu_16(eth->ether_type);
#if L2_PROTO_DBG
printf("%s => mbuf pkt dest mac addr: %x:%x:%x:%x:%x:%x\n",
__FUNCTION__, eth->d_addr.addr_bytes[0],
eth->d_addr.addr_bytes[1], eth->d_addr.addr_bytes[2],
eth->d_addr.addr_bytes[3], eth->d_addr.addr_bytes[4],
eth->d_addr.addr_bytes[5]);
printf("%s => port mac addr: %x:%x:%x:%x:%x:%x\n", __FUNCTION__,
port->macaddr[0], port->macaddr[1], port->macaddr[2],
port->macaddr[3], port->macaddr[4], port->macaddr[5]);
#endif
/* Compare the mac addresses */
same_mac =
(is_same_ether_addr
(ð->d_addr, (struct ether_addr *)port->macaddr)
||
((is_broadcast_ether_addr
((struct ether_addr *)ð->d_addr)
&& (ethtype == ETHER_TYPE_ARP)))
|| (ethtype == ETHER_TYPE_IPv6
&& eth->d_addr.addr_bytes[0] == 0x33
&& eth->d_addr.addr_bytes[1] == 0x33));
if (!same_mac) {
uint64_t temp_mask = 1LLU << i;
*pkts_mask ^= temp_mask;
rte_pktmbuf_free(m[i]);
m[i] = NULL;
} else if ((ethtype == ETHER_TYPE_IPv4) && same_mac) {
uint64_t temp_mask = 1LLU << i;
*ipv4_pkts_mask ^= temp_mask;
} else if ((ethtype == ETHER_TYPE_ARP) && same_mac) {
uint64_t temp_mask = 1LLU << i;
*arp_pkts_mask ^= temp_mask;
} else if ((ethtype == ETHER_TYPE_IPv6) && same_mac) {
uint64_t temp_mask = 1LLU << i;
*ipv6_pkts_mask ^= temp_mask;
}
}
printf("\n%s: arp_pkts_mask = %" PRIu64 ", ipv4_pkts_mask = %" PRIu64
", ipv6_pkts_mask =%" PRIu64 ", pkt-type = %x, sam_mac = %d\n",
__FUNCTION__, *arp_pkts_mask, *ipv4_pkts_mask, *ipv6_pkts_mask,
ethtype, same_mac);
}
void
protocol_handler_recv(struct rte_mbuf **pkts_burst, uint16_t nb_rx,
l2_phy_interface_t *port)
{
uint8_t i;
uint64_t pkts_mask = 0; //RTE_LEN2MASK(nb_rx, uint64_t);
uint64_t arp_pkts_mask = 0; //RTE_LEN2MASK(nb_rx, uint64_t);
uint64_t ipv4_pkts_mask = 0; //RTE_LEN2MASK(nb_rx, uint64_t);
uint64_t ipv6_pkts_mask = 0; //RTE_LEN2MASK(nb_rx, uint64_t);
/*Check the mac address of every single packet and unset the bits in the packet mask
*for those packets which are not destined to this host
*/
for (i = 0; i < nb_rx; i++) {
l2_check_mac(pkts_burst, port, i, &pkts_mask, &arp_pkts_mask,
&ipv4_pkts_mask, &ipv6_pkts_mask);
}
if (nb_rx) {
if (arp_pkts_mask) {
proto_list[ARP_VAL]->func(pkts_burst, nb_rx,
arp_pkts_mask, port);
printf
("=================After ARP ==================\n");
}
if (ipv4_pkts_mask) {
printf
("=================Calling IPV4 L3 RX ==================\n");
printf("====nb_rx:%u, ipv4_pkts_mask: %lu\n\n", nb_rx,
ipv4_pkts_mask);
proto_list[IPv4_VAL]->func(pkts_burst, nb_rx,
ipv4_pkts_mask, port);
}
if (ipv6_pkts_mask) {
printf
("=================Calling IPV6 L3 RX ==================\n");
printf("====nb_rx:%u, ipv6_pkts_mask: %lu\n\n", nb_rx,
ipv6_pkts_mask);
proto_list[IPv6_VAL]->func(pkts_burst, nb_rx,
ipv6_pkts_mask, port);
}
}
}
#if 0
switch (qid) {
case 1:
{
#if 0
printf
("=====================ENTERED ARP CASE================\n");
while (cur->type != ETHER_TYPE_ARP && cur != NULL) {
cur = cur->next;
}
if (cur != NULL) {
//printf("L2 PROTO TEST-14=================================\n");
printf
("==============\nARPARPARPARP \n=======================\n");
cur->func(pkts_burst, nb_rx, pkts_mask, portid);
}
#endif
proto_list[ARP_VAL]->func(pkts_burst, nb_rx, arp_pkts_mask,
portid);
break;
}
case 0:
{
#if 0
while (cur->type != ETHER_TYPE_IPv4 && cur != NULL) {
cur = cur->next;
}
if (cur != NULL) {
//printf("L2 PROTO TEST-15=================================\n");
//printf("==============\nPkts mask in while calling IPv4 %d \n=======================\n",ipv4_pkts_mask);
cur->func(pkts_burst, nb_rx, ipv4_pkts_mask, portid);
}
break;
#endif
// printf("=========Inside switch==============\n");
proto_list[IPv4_VAL]->func(pkts_burst, nb_rx, ipv4_pkts_mask,
portid);
break;
}
/* case 2:
{
while(cur->type != ETHER_TYPE_IPv6 && cur != NULL)
{
cur = cur->next;
}
if(cur != NULL)
{
cur->func(pkts_burst, nb_rx, ipv6_pkts_mask, portid);
}
break;
} */
default:
{
rte_exit(EXIT_FAILURE, "Ethertype not found \n");
break;
}
}
#endif
/*
* L2 Stack Init for future
void
l2_stack_init(void)
{
}
*/
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