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/* Copyright (c) 2017-2018, Linaro Limited
* All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
/* enable strtok */
#define _POSIX_C_SOURCE 200112L
#include <stdlib.h>
#include <string.h>
#include <example_debug.h>
#include <odp.h>
#include <odp_ipsec_offload_fwd_db.h>
/**
* Pointer to Flow cache table
*/
flow_bucket_t *flow_table;
/**
* bucket count. It will be updated with user argument if provided
*/
uint32_t bucket_count = DEFAULT_BUCKET_COUNT;
/** Global pointer to fwd db */
fwd_db_t *fwd_db;
void init_routing_table(void)
{
odp_shm_t hash_shm;
uint32_t i;
flow_bucket_t *bucket;
/*Reserve memory for Routing hash table*/
hash_shm = odp_shm_reserve("route_table",
sizeof(flow_bucket_t) * bucket_count,
ODP_CACHE_LINE_SIZE, 0);
if (hash_shm == ODP_SHM_INVALID)
EXAMPLE_ABORT("Error: shared mem alloc failed.\n");
flow_table = odp_shm_addr(hash_shm);
if (!flow_table)
EXAMPLE_ABORT("Error: shared mem alloc failed.\n");
/*Inialize Locks*/
for (i = 0; i < bucket_count; i++) {
bucket = &flow_table[i];
LOCK_INIT(&bucket->lock);
}
memset(flow_table, 0, bucket_count * sizeof(flow_bucket_t));
}
void init_fwd_db(void)
{
odp_shm_t shm;
shm = odp_shm_reserve("shm_fwd_db",
sizeof(fwd_db_t),
ODP_CACHE_LINE_SIZE,
0);
fwd_db = odp_shm_addr(shm);
if (fwd_db == NULL)
EXAMPLE_ABORT("Error: shared mem alloc failed.\n");
memset(fwd_db, 0, sizeof(*fwd_db));
}
int create_fwd_db_entry(char *input, char **if_names, int if_count, int entries)
{
int pos = 0, i, match = 0, count = 0;
char *local;
char *str;
char *save;
char *token;
fwd_db_entry_t *entry = &fwd_db->array[fwd_db->index];
/* Verify we haven't run out of space */
if (MAX_DB <= fwd_db->index)
return -1;
/* Make a local copy */
local = malloc(strlen(input) + 1);
if (NULL == local)
return -1;
strcpy(local, input);
/* Setup for using "strtok_r" to search input string */
str = local;
save = NULL;
/* Parse tokens separated by ':' */
while (NULL != (token = strtok_r(str, ":", &save))) {
str = NULL; /* reset str for subsequent strtok_r calls */
/* Parse token based on its position */
switch (pos) {
case 0:
parse_ipv4_string(token,
&entry->subnet.addr,
&entry->subnet.mask);
break;
case 1:
strncpy(entry->oif, token, OIF_LEN - 1);
entry->oif[OIF_LEN - 1] = 0;
for (i = 0; i < if_count; i++) {
if (!strcmp(if_names[i], entry->oif)) {
match = 1;
break;
}
}
if (!match) {
printf("ERROR: interface name not correct for route\n");
free(local);
return -1;
}
break;
case 2:
parse_mac_string(token, entry->dst_mac);
break;
default:
printf("ERROR: extra token \"%s\" at position %d\n",
token, pos);
break;
}
/* Advance to next position */
pos++;
}
/* Verify we parsed exactly the number of tokens we expected */
if (3 != pos) {
printf("ERROR: \"%s\" contains %d tokens, expected 3\n",
input,
pos);
free(local);
return -1;
}
/* Add route to the list */
fwd_db->index++;
entry->next = fwd_db->list;
fwd_db->list = entry;
count++;
while (count < entries) {
fwd_db_entry_t *new_entry = &fwd_db->array[fwd_db->index];
/* Verify we haven't run out of space */
if (MAX_DB <= fwd_db->index)
return -1;
new_entry->subnet.addr = entry->subnet.addr + count;
new_entry->subnet.mask = entry->subnet.mask;
strncpy(new_entry->oif, entry->oif, OIF_LEN - 1);
new_entry->oif[OIF_LEN - 1] = 0;
new_entry->dst_mac[0] = entry->dst_mac[0];
new_entry->dst_mac[1] = entry->dst_mac[1];
new_entry->dst_mac[2] = entry->dst_mac[2];
new_entry->dst_mac[3] = entry->dst_mac[3];
new_entry->dst_mac[4] = entry->dst_mac[4];
new_entry->dst_mac[5] = entry->dst_mac[5];
/* Add route to the list */
fwd_db->index++;
new_entry->next = fwd_db->list;
fwd_db->list = new_entry;
count++;
}
free(local);
return 0;
}
void resolve_fwd_db(char *intf, odp_pktout_queue_t pktout, uint8_t *mac)
{
fwd_db_entry_t *entry;
/* Walk the list and attempt to set output queue and MAC */
for (entry = fwd_db->list; NULL != entry; entry = entry->next) {
if (strcmp(intf, entry->oif))
continue;
entry->pktout = pktout;
memcpy(entry->src_mac, mac, ODPH_ETHADDR_LEN);
}
}
void dump_fwd_db_entry(fwd_db_entry_t *entry)
{
char subnet_str[MAX_STRING];
char mac_str[MAX_STRING];
printf(" %s %s %s\n",
ipv4_subnet_str(subnet_str, &entry->subnet),
entry->oif,
mac_addr_str(mac_str, entry->dst_mac));
}
void dump_fwd_db(void)
{
fwd_db_entry_t *entry;
printf("\n"
"Routing table\n"
"-------------\n");
for (entry = fwd_db->list; NULL != entry; entry = entry->next)
dump_fwd_db_entry(entry);
}
fwd_db_entry_t *find_fwd_db_entry(uint32_t dst_ip)
{
fwd_db_entry_t *entry;
for (entry = fwd_db->list; NULL != entry; entry = entry->next)
if (entry->subnet.addr == (dst_ip & entry->subnet.mask))
break;
return entry;
}
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