DPDK  20.11.3
examples/ipsec-secgw/rt.c
/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2016 Intel Corporation
*/
/*
* Routing Table (RT)
*/
#include <sys/types.h>
#include <rte_lpm.h>
#include <rte_lpm6.h>
#include <rte_errno.h>
#include <rte_ip.h>
#include "ipsec.h"
#include "parser.h"
#define RT_IPV4_MAX_RULES 1024
#define RT_IPV6_MAX_RULES 1024
struct ip4_route {
uint32_t ip;
uint8_t depth;
uint8_t if_out;
};
struct ip6_route {
uint8_t ip[16];
uint8_t depth;
uint8_t if_out;
};
struct ip4_route rt_ip4[RT_IPV4_MAX_RULES];
uint32_t nb_rt_ip4;
struct ip6_route rt_ip6[RT_IPV4_MAX_RULES];
uint32_t nb_rt_ip6;
void
parse_rt_tokens(char **tokens, uint32_t n_tokens,
struct parse_status *status)
{
uint32_t ti;
uint32_t *n_rts = NULL;
struct ip4_route *route_ipv4 = NULL;
struct ip6_route *route_ipv6 = NULL;
if (strcmp(tokens[0], "ipv4") == 0) {
n_rts = &nb_rt_ip4;
route_ipv4 = &rt_ip4[*n_rts];
APP_CHECK(*n_rts <= RT_IPV4_MAX_RULES - 1, status,
"too many rt rules, abort insertion\n");
if (status->status < 0)
return;
} else if (strcmp(tokens[0], "ipv6") == 0) {
n_rts = &nb_rt_ip6;
route_ipv6 = &rt_ip6[*n_rts];
APP_CHECK(*n_rts <= RT_IPV6_MAX_RULES - 1, status,
"too many rt rules, abort insertion\n");
if (status->status < 0)
return;
} else {
APP_CHECK(0, status, "unrecognized input \"%s\"",
tokens[0]);
return;
}
for (ti = 1; ti < n_tokens; ti++) {
if (strcmp(tokens[ti], "dst") == 0) {
INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
if (status->status < 0)
return;
if (route_ipv4 != NULL) {
struct in_addr ip;
uint32_t depth = 0;
APP_CHECK(parse_ipv4_addr(tokens[ti],
&ip, &depth) == 0, status,
"unrecognized input \"%s\", "
"expect valid ipv4 addr",
tokens[ti]);
if (status->status < 0)
return;
route_ipv4->ip = rte_bswap32(
(uint32_t)ip.s_addr);
route_ipv4->depth = (uint8_t)depth;
} else {
struct in6_addr ip;
uint32_t depth;
APP_CHECK(parse_ipv6_addr(tokens[ti],
&ip, &depth) == 0, status,
"unrecognized input \"%s\", "
"expect valid ipv6 address",
tokens[ti]);
if (status->status < 0)
return;
memcpy(route_ipv6->ip, ip.s6_addr, 16);
route_ipv6->depth = (uint8_t)depth;
}
}
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;
if (route_ipv4 != NULL)
route_ipv4->if_out = atoi(tokens[ti]);
else
route_ipv6->if_out = atoi(tokens[ti]);
}
}
*n_rts = *n_rts + 1;
}
void
rt_init(struct socket_ctx *ctx, int32_t socket_id)
{
char name[PATH_MAX];
uint32_t i;
int32_t ret;
struct rte_lpm *lpm;
struct rte_lpm6 *lpm6;
char a, b, c, d;
struct rte_lpm_config conf = { 0 };
struct rte_lpm6_config conf6 = { 0 };
if (ctx == NULL)
rte_exit(EXIT_FAILURE, "NULL context.\n");
if (ctx->rt_ip4 != NULL)
rte_exit(EXIT_FAILURE, "IPv4 Routing Table for socket %u "
"already initialized\n", socket_id);
if (ctx->rt_ip6 != NULL)
rte_exit(EXIT_FAILURE, "IPv6 Routing Table for socket %u "
"already initialized\n", socket_id);
if (nb_rt_ip4 == 0 && nb_rt_ip6 == 0)
RTE_LOG(WARNING, IPSEC, "No Routing rule specified\n");
printf("Creating IPv4 Routing Table (RT) context with %u max routes\n",
RT_IPV4_MAX_RULES);
/* create the LPM table */
snprintf(name, sizeof(name), "%s_%u", "rt_ip4", socket_id);
conf.max_rules = RT_IPV4_MAX_RULES;
conf.number_tbl8s = RTE_LPM_TBL8_NUM_ENTRIES;
lpm = rte_lpm_create(name, socket_id, &conf);
if (lpm == NULL)
rte_exit(EXIT_FAILURE, "Unable to create %s LPM table "
"on socket %d\n", name, socket_id);
/* populate the LPM table */
for (i = 0; i < nb_rt_ip4; i++) {
ret = rte_lpm_add(lpm, rt_ip4[i].ip, rt_ip4[i].depth,
rt_ip4[i].if_out);
if (ret < 0)
rte_exit(EXIT_FAILURE, "Fail to add entry num %u to %s "
"LPM table on socket %d\n", i, name, socket_id);
uint32_t_to_char(rt_ip4[i].ip, &a, &b, &c, &d);
printf("LPM: Adding route %hhu.%hhu.%hhu.%hhu/%hhu (%hhu)\n",
a, b, c, d, rt_ip4[i].depth,
rt_ip4[i].if_out);
}
snprintf(name, sizeof(name), "%s_%u", "rt_ip6", socket_id);
conf6.max_rules = RT_IPV6_MAX_RULES;
conf6.number_tbl8s = RTE_LPM_TBL8_NUM_ENTRIES;
lpm6 = rte_lpm6_create(name, socket_id, &conf6);
if (lpm6 == NULL)
rte_exit(EXIT_FAILURE, "Unable to create %s LPM table "
"on socket %d\n", name, socket_id);
/* populate the LPM table */
for (i = 0; i < nb_rt_ip6; i++) {
ret = rte_lpm6_add(lpm6, rt_ip6[i].ip, rt_ip6[i].depth,
rt_ip6[i].if_out);
if (ret < 0)
rte_exit(EXIT_FAILURE, "Fail to add entry num %u to %s "
"LPM table on socket %d\n", i, name, socket_id);
printf("LPM6: Adding route "
" %hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx/%hhx (%hhx)\n",
(uint16_t)((rt_ip6[i].ip[0] << 8) | rt_ip6[i].ip[1]),
(uint16_t)((rt_ip6[i].ip[2] << 8) | rt_ip6[i].ip[3]),
(uint16_t)((rt_ip6[i].ip[4] << 8) | rt_ip6[i].ip[5]),
(uint16_t)((rt_ip6[i].ip[6] << 8) | rt_ip6[i].ip[7]),
(uint16_t)((rt_ip6[i].ip[8] << 8) | rt_ip6[i].ip[9]),
(uint16_t)((rt_ip6[i].ip[10] << 8) | rt_ip6[i].ip[11]),
(uint16_t)((rt_ip6[i].ip[12] << 8) | rt_ip6[i].ip[13]),
(uint16_t)((rt_ip6[i].ip[14] << 8) | rt_ip6[i].ip[15]),
rt_ip6[i].depth, rt_ip6[i].if_out);
}
ctx->rt_ip4 = (struct rt_ctx *)lpm;
ctx->rt_ip6 = (struct rt_ctx *)lpm6;
}