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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* iplink_vlan.c VLAN device support
*
* Authors: Patrick McHardy <kaber@trash.net>
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <linux/if_vlan.h>
#include "rt_names.h"
#include "utils.h"
#include "ip_common.h"
static void print_explain(FILE *f)
{
fprintf(f,
"Usage: ... vlan id VLANID\n"
" [ protocol VLANPROTO ]\n"
" [ reorder_hdr { on | off } ]\n"
" [ gvrp { on | off } ]\n"
" [ mvrp { on | off } ]\n"
" [ loose_binding { on | off } ]\n"
" [ bridge_binding { on | off } ]\n"
" [ ingress-qos-map QOS-MAP ]\n"
" [ egress-qos-map QOS-MAP ]\n"
"\n"
"VLANID := 0-4095\n"
"VLANPROTO: [ 802.1Q | 802.1ad ]\n"
"QOS-MAP := [ QOS-MAP ] QOS-MAPPING\n"
"QOS-MAPPING := FROM:TO\n"
);
}
static void explain(void)
{
print_explain(stderr);
}
static int on_off(const char *msg, const char *arg)
{
fprintf(stderr, "Error: argument of \"%s\" must be \"on\" or \"off\", not \"%s\"\n", msg, arg);
return -1;
}
static int parse_qos_mapping(__u32 key, char *value, void *data)
{
struct nlmsghdr *n = data;
struct ifla_vlan_qos_mapping m = {
.from = key,
};
if (get_u32(&m.to, value, 0))
return 1;
return addattr_l(n, 1024, IFLA_VLAN_QOS_MAPPING, &m, sizeof(m));
}
static int vlan_parse_qos_map(int *argcp, char ***argvp, struct nlmsghdr *n,
int attrtype)
{
struct rtattr *tail;
tail = addattr_nest(n, 1024, attrtype);
if (parse_mapping(argcp, argvp, false, &parse_qos_mapping, n))
return 1;
addattr_nest_end(n, tail);
return 0;
}
static int vlan_parse_opt(struct link_util *lu, int argc, char **argv,
struct nlmsghdr *n)
{
struct ifla_vlan_flags flags = { 0 };
__u16 id, proto;
while (argc > 0) {
if (matches(*argv, "protocol") == 0) {
NEXT_ARG();
if (ll_proto_a2n(&proto, *argv))
invarg("protocol is invalid", *argv);
addattr_l(n, 1024, IFLA_VLAN_PROTOCOL, &proto, 2);
} else if (matches(*argv, "id") == 0) {
NEXT_ARG();
if (get_u16(&id, *argv, 0))
invarg("id is invalid", *argv);
addattr_l(n, 1024, IFLA_VLAN_ID, &id, 2);
} else if (matches(*argv, "reorder_hdr") == 0) {
NEXT_ARG();
flags.mask |= VLAN_FLAG_REORDER_HDR;
if (strcmp(*argv, "on") == 0)
flags.flags |= VLAN_FLAG_REORDER_HDR;
else if (strcmp(*argv, "off") == 0)
flags.flags &= ~VLAN_FLAG_REORDER_HDR;
else
return on_off("reorder_hdr", *argv);
} else if (matches(*argv, "gvrp") == 0) {
NEXT_ARG();
flags.mask |= VLAN_FLAG_GVRP;
if (strcmp(*argv, "on") == 0)
flags.flags |= VLAN_FLAG_GVRP;
else if (strcmp(*argv, "off") == 0)
flags.flags &= ~VLAN_FLAG_GVRP;
else
return on_off("gvrp", *argv);
} else if (matches(*argv, "mvrp") == 0) {
NEXT_ARG();
flags.mask |= VLAN_FLAG_MVRP;
if (strcmp(*argv, "on") == 0)
flags.flags |= VLAN_FLAG_MVRP;
else if (strcmp(*argv, "off") == 0)
flags.flags &= ~VLAN_FLAG_MVRP;
else
return on_off("mvrp", *argv);
} else if (matches(*argv, "loose_binding") == 0) {
NEXT_ARG();
flags.mask |= VLAN_FLAG_LOOSE_BINDING;
if (strcmp(*argv, "on") == 0)
flags.flags |= VLAN_FLAG_LOOSE_BINDING;
else if (strcmp(*argv, "off") == 0)
flags.flags &= ~VLAN_FLAG_LOOSE_BINDING;
else
return on_off("loose_binding", *argv);
} else if (matches(*argv, "bridge_binding") == 0) {
NEXT_ARG();
flags.mask |= VLAN_FLAG_BRIDGE_BINDING;
if (strcmp(*argv, "on") == 0)
flags.flags |= VLAN_FLAG_BRIDGE_BINDING;
else if (strcmp(*argv, "off") == 0)
flags.flags &= ~VLAN_FLAG_BRIDGE_BINDING;
else
return on_off("bridge_binding", *argv);
} else if (matches(*argv, "ingress-qos-map") == 0) {
NEXT_ARG();
if (vlan_parse_qos_map(&argc, &argv, n,
IFLA_VLAN_INGRESS_QOS))
invarg("invalid ingress-qos-map", *argv);
continue;
} else if (matches(*argv, "egress-qos-map") == 0) {
NEXT_ARG();
if (vlan_parse_qos_map(&argc, &argv, n,
IFLA_VLAN_EGRESS_QOS))
invarg("invalid egress-qos-map", *argv);
continue;
} else if (matches(*argv, "help") == 0) {
explain();
return -1;
} else {
fprintf(stderr, "vlan: unknown command \"%s\"?\n", *argv);
explain();
return -1;
}
argc--, argv++;
}
if (flags.mask)
addattr_l(n, 1024, IFLA_VLAN_FLAGS, &flags, sizeof(flags));
return 0;
}
static void vlan_print_map(FILE *f,
const char *name_json,
const char *name_fp,
struct rtattr *attr)
{
struct ifla_vlan_qos_mapping *m;
struct rtattr *i;
int rem;
open_json_array(PRINT_JSON, name_json);
print_nl();
print_string(PRINT_FP, NULL, " %s { ", name_fp);
rem = RTA_PAYLOAD(attr);
for (i = RTA_DATA(attr); RTA_OK(i, rem); i = RTA_NEXT(i, rem)) {
m = RTA_DATA(i);
if (is_json_context()) {
open_json_object(NULL);
print_uint(PRINT_JSON, "from", NULL, m->from);
print_uint(PRINT_JSON, "to", NULL, m->to);
close_json_object();
} else {
fprintf(f, "%u:%u ", m->from, m->to);
}
}
close_json_array(PRINT_JSON, NULL);
print_string(PRINT_FP, NULL, "%s ", "}");
}
static void vlan_print_flags(FILE *fp, __u32 flags)
{
open_json_array(PRINT_ANY, is_json_context() ? "flags" : "<");
#define _PF(f) if (flags & VLAN_FLAG_##f) { \
flags &= ~VLAN_FLAG_##f; \
print_string(PRINT_ANY, NULL, flags ? "%s," : "%s", #f); \
}
_PF(REORDER_HDR);
_PF(GVRP);
_PF(MVRP);
_PF(LOOSE_BINDING);
_PF(BRIDGE_BINDING);
#undef _PF
if (flags)
print_hex(PRINT_ANY, NULL, "%x", flags);
close_json_array(PRINT_ANY, "> ");
}
static void vlan_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
{
struct ifla_vlan_flags *flags;
SPRINT_BUF(b1);
if (!tb)
return;
if (tb[IFLA_VLAN_PROTOCOL] &&
RTA_PAYLOAD(tb[IFLA_VLAN_PROTOCOL]) < sizeof(__u16))
return;
if (!tb[IFLA_VLAN_ID] ||
RTA_PAYLOAD(tb[IFLA_VLAN_ID]) < sizeof(__u16))
return;
if (tb[IFLA_VLAN_PROTOCOL])
print_string(PRINT_ANY,
"protocol",
"protocol %s ",
ll_proto_n2a(
rta_getattr_u16(tb[IFLA_VLAN_PROTOCOL]),
b1, sizeof(b1)));
else
print_string(PRINT_ANY, "protocol", "protocol %s ", "802.1q");
print_uint(PRINT_ANY,
"id",
"id %u ",
rta_getattr_u16(tb[IFLA_VLAN_ID]));
if (tb[IFLA_VLAN_FLAGS]) {
if (RTA_PAYLOAD(tb[IFLA_VLAN_FLAGS]) < sizeof(*flags))
return;
flags = RTA_DATA(tb[IFLA_VLAN_FLAGS]);
vlan_print_flags(f, flags->flags);
}
if (tb[IFLA_VLAN_INGRESS_QOS])
vlan_print_map(f,
"ingress_qos",
"ingress-qos-map",
tb[IFLA_VLAN_INGRESS_QOS]);
if (tb[IFLA_VLAN_EGRESS_QOS])
vlan_print_map(f,
"egress_qos",
"egress-qos-map",
tb[IFLA_VLAN_EGRESS_QOS]);
}
static void vlan_print_help(struct link_util *lu, int argc, char **argv,
FILE *f)
{
print_explain(f);
}
struct link_util vlan_link_util = {
.id = "vlan",
.maxattr = IFLA_VLAN_MAX,
.parse_opt = vlan_parse_opt,
.print_opt = vlan_print_opt,
.print_help = vlan_print_help,
};
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