examples/flow_filtering/snippets/snippet_match_gre.c

/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright (c) 2022 NVIDIA Corporation & Affiliates
 */
 
#include <stdlib.h>
#include <rte_flow.h>
 
#include <rte_common.h>
 
#include "../common.h"
#include "snippet_match_gre.h"
 
void
snippet_init_gre(void)
{
    init_default_snippet();
}
 
static void
snippet_match_gre_create_actions(__rte_unused uint16_t port_id, struct rte_flow_action *action)
{
    /* Create one action that moves the packet to the selected queue. */
    struct rte_flow_action_queue *queue = calloc(1, sizeof(struct rte_flow_action_queue));
    if (queue == NULL)
        fprintf(stderr, "Failed to allocate memory for queue\n");
 
    /* Set the selected queue. */
    queue->index = 1;
 
    /* Set the action move packet to the selected queue. */
    action[0].type = RTE_FLOW_ACTION_TYPE_QUEUE;
    action[0].conf = queue;
    action[1].type = RTE_FLOW_ACTION_TYPE_END;
}
 
static void
snippet_match_gre_create_patterns(struct rte_flow_item *pattern)
{
    struct rte_flow_item_gre *gre_spec;
    struct rte_flow_item_gre_opt *gre_opt_spec;
 
    gre_spec = calloc(1, sizeof(struct rte_flow_item_gre));
    if (gre_spec == NULL)
        fprintf(stderr, "Failed to allocate memory for gre_spec\n");
 
    gre_opt_spec = calloc(1, sizeof(struct rte_flow_item_gre_opt));
    if (gre_opt_spec == NULL)
        fprintf(stderr, "Failed to allocate memory for gre_opt_spec\n");
 
    /* Set the Checksum GRE option. */
    gre_spec->c_rsvd0_ver = RTE_BE16(0x8000);
    gre_opt_spec->checksum_rsvd.checksum = RTE_BE16(0x11);
 
    /* Set the patterns. */
    pattern[0].type = RTE_FLOW_ITEM_TYPE_ETH;
    pattern[1].type = RTE_FLOW_ITEM_TYPE_IPV4;
    pattern[2].type = RTE_FLOW_ITEM_TYPE_GRE;
    pattern[2].spec = gre_spec;
    pattern[3].type = RTE_FLOW_ITEM_TYPE_GRE_OPTION;
    pattern[3].spec = gre_opt_spec;
    pattern[3].mask = gre_opt_spec;
    pattern[4].type = RTE_FLOW_ITEM_TYPE_END;
}
 
static struct rte_flow_template_table *
snippet_gre_flow_create_table(
    __rte_unused uint16_t port_id,
    __rte_unused struct rte_flow_error *error)
{
    return NULL;
}