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/* SPDX-License-Identifier: GPL-2.0 */
#include <stdio.h>
#include "rt_names.h"
#include "utils.h"
#include "ip_common.h"
#define GTP_ATTRSET(attrs, type) (((attrs) & (1L << (type))) != 0)
static void print_explain(FILE *f)
{
fprintf(f,
"Usage: ... gtp role ROLE\n"
" [ hsize HSIZE ]\n"
" [ restart_count RESTART_COUNT ]\n"
"\n"
"Where: ROLE := { sgsn | ggsn }\n"
" HSIZE := 1-131071\n"
" RESTART_COUNT := 0-255\n"
);
}
static void check_duparg(__u32 *attrs, int type, const char *key,
const char *argv)
{
if (!GTP_ATTRSET(*attrs, type)) {
*attrs |= (1L << type);
return;
}
duparg2(key, argv);
}
static int gtp_parse_opt(struct link_util *lu, int argc, char **argv,
struct nlmsghdr *n)
{
__u32 attrs = 0;
/* When creating GTP device through ip link,
* this flag has to be set.
*/
addattr8(n, 1024, IFLA_GTP_CREATE_SOCKETS, true);
while (argc > 0) {
if (!strcmp(*argv, "role")) {
NEXT_ARG();
check_duparg(&attrs, IFLA_GTP_ROLE, "role", *argv);
if (!strcmp(*argv, "sgsn"))
addattr32(n, 1024, IFLA_GTP_ROLE, GTP_ROLE_SGSN);
else if (!strcmp(*argv, "ggsn"))
addattr32(n, 1024, IFLA_GTP_ROLE, GTP_ROLE_GGSN);
else
invarg("invalid role, use sgsn or ggsn", *argv);
} else if (!strcmp(*argv, "hsize")) {
__u32 hsize;
NEXT_ARG();
check_duparg(&attrs, IFLA_GTP_PDP_HASHSIZE, "hsize", *argv);
if (get_u32(&hsize, *argv, 0))
invarg("invalid PDP hash size", *argv);
if (hsize >= 1u << 17)
invarg("PDP hash size too big", *argv);
addattr32(n, 1024, IFLA_GTP_PDP_HASHSIZE, hsize);
} else if (!strcmp(*argv, "restart_count")) {
__u8 restart_count;
NEXT_ARG();
check_duparg(&attrs, IFLA_GTP_RESTART_COUNT, "restart_count", *argv);
if (get_u8(&restart_count, *argv, 10))
invarg("invalid restart_count", *argv);
addattr8(n, 1024, IFLA_GTP_RESTART_COUNT, restart_count);
} else if (!strcmp(*argv, "help")) {
print_explain(stderr);
return -1;
}
argc--, argv++;
}
if (!GTP_ATTRSET(attrs, IFLA_GTP_ROLE)) {
fprintf(stderr, "gtp: role of the gtp device was not specified\n");
return -1;
}
if (!GTP_ATTRSET(attrs, IFLA_GTP_PDP_HASHSIZE))
addattr32(n, 1024, IFLA_GTP_PDP_HASHSIZE, 1024);
return 0;
}
static const char *gtp_role_to_string(__u32 role)
{
switch (role) {
case GTP_ROLE_GGSN:
return "ggsn";
case GTP_ROLE_SGSN:
return "sgsn";
default:
return "unknown";
}
}
static void gtp_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
{
if (tb[IFLA_GTP_ROLE]) {
__u32 role = rta_getattr_u32(tb[IFLA_GTP_ROLE]);
print_string(PRINT_ANY, "role", "role %s ",
gtp_role_to_string(role));
}
if (tb[IFLA_GTP_PDP_HASHSIZE]) {
__u32 hsize = rta_getattr_u32(tb[IFLA_GTP_PDP_HASHSIZE]);
print_uint(PRINT_ANY, "hsize", "hsize %u ", hsize);
}
if (tb[IFLA_GTP_RESTART_COUNT]) {
__u8 restart_count = rta_getattr_u8(tb[IFLA_GTP_RESTART_COUNT]);
print_uint(PRINT_ANY, "restart_count",
"restart_count %u ", restart_count);
}
}
static void gtp_print_help(struct link_util *lu, int argc, char **argv,
FILE *f)
{
print_explain(f);
}
struct link_util gtp_link_util = {
.id = "gtp",
.maxattr = IFLA_GTP_MAX,
.parse_opt = gtp_parse_opt,
.print_opt = gtp_print_opt,
.print_help = gtp_print_help,
};
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