/*
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* iplink_vxcan.c vxcan device support (Virtual CAN Tunnel)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* Author: Oliver Hartkopp <socketcan@hartkopp.net>
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* Based on: link_veth.c from Pavel Emelianov <xemul@openvz.org>
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <net/if.h>
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#include <linux/can/vxcan.h>
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#include "utils.h"
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#include "ip_common.h"
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static void print_usage(FILE *f)
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{
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printf("Usage: ip link <options> type vxcan [peer <options>]\n"
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"To get <options> type 'ip link add help'\n");
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}
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static void usage(void)
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{
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print_usage(stderr);
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}
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static int vxcan_parse_opt(struct link_util *lu, int argc, char **argv,
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struct nlmsghdr *hdr)
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{
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char *dev = NULL;
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char *name = NULL;
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char *link = NULL;
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char *type = NULL;
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int index = 0;
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int err, len;
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struct rtattr *data;
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int group;
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struct ifinfomsg *ifm, *peer_ifm;
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unsigned int ifi_flags, ifi_change;
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if (strcmp(argv[0], "peer") != 0) {
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usage();
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return -1;
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}
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ifm = NLMSG_DATA(hdr);
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ifi_flags = ifm->ifi_flags;
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ifi_change = ifm->ifi_change;
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ifm->ifi_flags = 0;
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ifm->ifi_change = 0;
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data = NLMSG_TAIL(hdr);
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addattr_l(hdr, 1024, VXCAN_INFO_PEER, NULL, 0);
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hdr->nlmsg_len += sizeof(struct ifinfomsg);
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err = iplink_parse(argc - 1, argv + 1, (struct iplink_req *)hdr,
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&name, &type, &link, &dev, &group, &index);
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if (err < 0)
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return err;
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if (name) {
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len = strlen(name) + 1;
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if (len > IFNAMSIZ)
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invarg("\"name\" too long\n", *argv);
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addattr_l(hdr, 1024, IFLA_IFNAME, name, len);
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}
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peer_ifm = RTA_DATA(data);
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peer_ifm->ifi_index = index;
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peer_ifm->ifi_flags = ifm->ifi_flags;
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peer_ifm->ifi_change = ifm->ifi_change;
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ifm->ifi_flags = ifi_flags;
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ifm->ifi_change = ifi_change;
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if (group != -1)
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addattr32(hdr, 1024, IFLA_GROUP, group);
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data->rta_len = (void *)NLMSG_TAIL(hdr) - (void *)data;
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return argc - 1 - err;
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}
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static void vxcan_print_help(struct link_util *lu, int argc, char **argv,
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FILE *f)
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{
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print_usage(f);
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}
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struct link_util vxcan_link_util = {
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.id = "vxcan",
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.parse_opt = vxcan_parse_opt,
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.print_help = vxcan_print_help,
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};
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