DPDK  20.11.3
examples/ipsec-secgw/flow.c
/* SPDX-License-Identifier: BSD-3-Clause
* Copyright (C) 2020 Marvell International Ltd.
*/
#include <stdio.h>
#include <rte_common.h>
#include <rte_flow.h>
#include <rte_ip.h>
#include "flow.h"
#include "ipsec-secgw.h"
#include "parser.h"
#define FLOW_RULES_MAX 128
struct flow_rule_entry {
uint8_t is_ipv4;
union {
struct {
struct rte_flow_item_ipv4 spec;
struct rte_flow_item_ipv4 mask;
} ipv4;
struct {
struct rte_flow_item_ipv6 spec;
struct rte_flow_item_ipv6 mask;
} ipv6;
};
uint16_t port;
uint16_t queue;
struct rte_flow *flow;
} flow_rule_tbl[FLOW_RULES_MAX];
int nb_flow_rule;
static void
ipv4_hdr_print(struct rte_ipv4_hdr *hdr)
{
char a, b, c, d;
uint32_t_to_char(rte_bswap32(hdr->src_addr), &a, &b, &c, &d);
printf("src: %3hhu.%3hhu.%3hhu.%3hhu \t", a, b, c, d);
uint32_t_to_char(rte_bswap32(hdr->dst_addr), &a, &b, &c, &d);
printf("dst: %3hhu.%3hhu.%3hhu.%3hhu", a, b, c, d);
}
static int
ipv4_addr_cpy(rte_be32_t *spec, rte_be32_t *mask, char *token,
struct parse_status *status)
{
struct in_addr ip;
uint32_t depth;
APP_CHECK(parse_ipv4_addr(token, &ip, &depth) == 0, status,
"unrecognized input \"%s\", expect valid ipv4 addr", token);
if (status->status < 0)
return -1;
if (depth > 32)
return -1;
memcpy(mask, &rte_flow_item_ipv4_mask.hdr.src_addr, sizeof(ip));
*spec = ip.s_addr;
if (depth < 32)
*mask = *mask << (32-depth);
return 0;
}
static void
ipv6_hdr_print(struct rte_ipv6_hdr *hdr)
{
uint8_t *addr;
addr = hdr->src_addr;
printf("src: %4hx:%4hx:%4hx:%4hx:%4hx:%4hx:%4hx:%4hx \t",
(uint16_t)((addr[0] << 8) | addr[1]),
(uint16_t)((addr[2] << 8) | addr[3]),
(uint16_t)((addr[4] << 8) | addr[5]),
(uint16_t)((addr[6] << 8) | addr[7]),
(uint16_t)((addr[8] << 8) | addr[9]),
(uint16_t)((addr[10] << 8) | addr[11]),
(uint16_t)((addr[12] << 8) | addr[13]),
(uint16_t)((addr[14] << 8) | addr[15]));
addr = hdr->dst_addr;
printf("dst: %4hx:%4hx:%4hx:%4hx:%4hx:%4hx:%4hx:%4hx",
(uint16_t)((addr[0] << 8) | addr[1]),
(uint16_t)((addr[2] << 8) | addr[3]),
(uint16_t)((addr[4] << 8) | addr[5]),
(uint16_t)((addr[6] << 8) | addr[7]),
(uint16_t)((addr[8] << 8) | addr[9]),
(uint16_t)((addr[10] << 8) | addr[11]),
(uint16_t)((addr[12] << 8) | addr[13]),
(uint16_t)((addr[14] << 8) | addr[15]));
}
static int
ipv6_addr_cpy(uint8_t *spec, uint8_t *mask, char *token,
struct parse_status *status)
{
struct in6_addr ip;
uint32_t depth, i;
APP_CHECK(parse_ipv6_addr(token, &ip, &depth) == 0, status,
"unrecognized input \"%s\", expect valid ipv6 address", token);
if (status->status < 0)
return -1;
memcpy(mask, &rte_flow_item_ipv6_mask.hdr.src_addr, sizeof(ip));
memcpy(spec, ip.s6_addr, sizeof(struct in6_addr));
for (i = 0; i < depth && (i%8 <= sizeof(struct in6_addr)); i++)
mask[i/8] &= ~(1 << (7-i%8));
return 0;
}
void
parse_flow_tokens(char **tokens, uint32_t n_tokens,
struct parse_status *status)
{
struct flow_rule_entry *rule;
uint32_t ti;
if (nb_flow_rule >= FLOW_RULES_MAX) {
printf("Too many flow rules\n");
return;
}
rule = &flow_rule_tbl[nb_flow_rule];
memset(rule, 0, sizeof(*rule));
if (strcmp(tokens[0], "ipv4") == 0) {
rule->is_ipv4 = 1;
} else if (strcmp(tokens[0], "ipv6") == 0) {
rule->is_ipv4 = 0;
} else {
APP_CHECK(0, status, "unrecognized input \"%s\"", tokens[0]);
return;
}
for (ti = 1; ti < n_tokens; ti++) {
if (strcmp(tokens[ti], "src") == 0) {
INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
if (status->status < 0)
return;
if (rule->is_ipv4) {
if (ipv4_addr_cpy(&rule->ipv4.spec.hdr.src_addr,
&rule->ipv4.mask.hdr.src_addr,
tokens[ti], status))
return;
} else {
if (ipv6_addr_cpy(rule->ipv6.spec.hdr.src_addr,
rule->ipv6.mask.hdr.src_addr,
tokens[ti], status))
return;
}
}
if (strcmp(tokens[ti], "dst") == 0) {
INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
if (status->status < 0)
return;
if (rule->is_ipv4) {
if (ipv4_addr_cpy(&rule->ipv4.spec.hdr.dst_addr,
&rule->ipv4.mask.hdr.dst_addr,
tokens[ti], status))
return;
} else {
if (ipv6_addr_cpy(rule->ipv6.spec.hdr.dst_addr,
rule->ipv6.mask.hdr.dst_addr,
tokens[ti], status))
return;
}
}
if (strcmp(tokens[ti], "port") == 0) {
INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
if (status->status < 0)
return;
APP_CHECK_TOKEN_IS_NUM(tokens, ti, status);
if (status->status < 0)
return;
rule->port = atoi(tokens[ti]);
INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
if (status->status < 0)
return;
APP_CHECK_TOKEN_IS_NUM(tokens, ti, status);
if (status->status < 0)
return;
rule->queue = atoi(tokens[ti]);
}
}
nb_flow_rule++;
}
#define MAX_RTE_FLOW_PATTERN (3)
#define MAX_RTE_FLOW_ACTIONS (2)
static void
flow_init_single(struct flow_rule_entry *rule)
{
struct rte_flow_item pattern[MAX_RTE_FLOW_PATTERN] = {};
struct rte_flow_action action[MAX_RTE_FLOW_ACTIONS] = {};
struct rte_flow_attr attr = {};
struct rte_flow_error err;
int ret;
attr.egress = 0;
attr.ingress = 1;
action[0].conf = &(struct rte_flow_action_queue) {
.index = rule->queue,
};
if (rule->is_ipv4) {
pattern[1].spec = &rule->ipv4.spec;
pattern[1].mask = &rule->ipv4.mask;
} else {
pattern[1].spec = &rule->ipv6.spec;
pattern[1].mask = &rule->ipv6.mask;
}
ret = rte_flow_validate(rule->port, &attr, pattern, action, &err);
if (ret < 0) {
RTE_LOG(ERR, IPSEC, "Flow validation failed %s\n", err.message);
return;
}
rule->flow = rte_flow_create(rule->port, &attr, pattern, action, &err);
if (rule->flow == NULL)
RTE_LOG(ERR, IPSEC, "Flow creation return %s\n", err.message);
}
void
flow_init(void)
{
struct flow_rule_entry *rule;
int i;
for (i = 0; i < nb_flow_rule; i++) {
rule = &flow_rule_tbl[i];
flow_init_single(rule);
}
for (i = 0; i < nb_flow_rule; i++) {
rule = &flow_rule_tbl[i];
if (rule->is_ipv4) {
printf("Flow #%3d: spec ipv4 ", i);
ipv4_hdr_print(&rule->ipv4.spec.hdr);
printf("\n");
printf(" mask ipv4 ");
ipv4_hdr_print(&rule->ipv4.mask.hdr);
} else {
printf("Flow #%3d: spec ipv6 ", i);
ipv6_hdr_print(&rule->ipv6.spec.hdr);
printf("\n");
printf(" mask ipv6 ");
ipv6_hdr_print(&rule->ipv6.mask.hdr);
}
printf("\tPort: %d, Queue: %d", rule->port, rule->queue);
if (rule->flow == NULL)
printf(" [UNSUPPORTED]");
printf("\n");
}
}