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/*
* iplink_vlan.c VLAN device support
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
* 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 explain(void)
{
fprintf(stderr,
"Usage: ... vlan id VLANID [ FLAG-LIST ]\n"
" [ ingress-qos-map QOS-MAP ] [ egress-qos-map QOS-MAP ]\n"
"\n"
"VLANID := 0-4095\n"
"FLAG-LIST := [ FLAG-LIST ] FLAG\n"
"FLAG := [ reorder_hdr { on | off } ] [ gvrp { on | off } ]\n"
" [ loose_binding { on | off } ]\n"
"QOS-MAP := [ QOS-MAP ] QOS-MAPPING\n"
"QOS-MAPPING := FROM:TO\n"
);
}
static int on_off(char *msg)
{
fprintf(stderr, "Error: argument of \"%s\" must be \"on\" or \"off\"\n", msg);
return -1;
}
static int vlan_parse_qos_map(int *argcp, char ***argvp, struct nlmsghdr *n,
int attrtype)
{
int argc = *argcp;
char **argv = *argvp;
struct ifla_vlan_qos_mapping m;
struct rtattr *tail;
tail = NLMSG_TAIL(n);
addattr_l(n, 1024, attrtype, NULL, 0);
while (argc > 0) {
char *colon = strchr(*argv, ':');
if (!colon)
break;
*colon = '\0';
if (get_u32(&m.from, *argv, 0))
return 1;
if (get_u32(&m.to, colon + 1, 0))
return 1;
argc--, argv++;
addattr_l(n, 1024, IFLA_VLAN_QOS_MAPPING, &m, sizeof(m));
}
tail->rta_len = (void *) NLMSG_TAIL(n) - (void *)tail;
*argcp = argc;
*argvp = argv;
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;
while (argc > 0) {
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");
} 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");
} 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");
} 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: what is \"%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, char *name, struct rtattr *attr)
{
struct ifla_vlan_qos_mapping *m;
struct rtattr *i;
int rem;
fprintf(f, "\n %s { ", name);
rem = RTA_PAYLOAD(attr);
for (i = RTA_DATA(attr); RTA_OK(i, rem); i = RTA_NEXT(i, rem)) {
m = RTA_DATA(i);
fprintf(f, "%u:%u ", m->from, m->to);
}
fprintf(f, "} ");
}
static void vlan_print_flags(FILE *fp, __u32 flags)
{
fprintf(fp, "<");
#define _PF(f) if (flags & VLAN_FLAG_##f) { \
flags &= ~ VLAN_FLAG_##f; \
fprintf(fp, #f "%s", flags ? "," : ""); \
}
_PF(REORDER_HDR);
_PF(GVRP);
_PF(LOOSE_BINDING);
#undef _PF
if (flags)
fprintf(fp, "%x", flags);
fprintf(fp, "> ");
}
static void vlan_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
{
struct ifla_vlan_flags *flags;
if (!tb)
return;
if (!tb[IFLA_VLAN_ID] ||
RTA_PAYLOAD(tb[IFLA_VLAN_ID]) < sizeof(__u16))
return;
fprintf(f, "id %u ", *(__u16 *)RTA_DATA(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-map", tb[IFLA_VLAN_INGRESS_QOS]);
if (tb[IFLA_VLAN_EGRESS_QOS])
vlan_print_map(f, "egress-qos-map", tb[IFLA_VLAN_EGRESS_QOS]);
}
struct link_util vlan_link_util = {
.id = "vlan",
.maxattr = IFLA_VLAN_MAX,
.parse_opt = vlan_parse_opt,
.print_opt = vlan_print_opt,
};
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