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https://git.kernel.org/pub/scm/network/iproute2/iproute2.git
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81eaf677f9
Adding basic support to create virtual devices using 'ip' utility. Following is the syntax - ip link add link <master> <virtual> type ipvlan mode [ l2 | l3 ] e.g. ip link add link eth0 ipvl0 type ipvlan mode l3 Signed-off-by: Mahesh Bandewar <maheshb@google.com> Cc: Stephen Hemminger <stephen@networkplumber.org> Cc: Eric Dumazet <edumazet@google.com> Cc: Maciej Żenczykowski <maze@google.com> Cc: Laurent Chavey <chavey@google.com> Cc: Tim Hockin <thockin@google.com> Cc: Brandon Philips <brandon.philips@coreos.com> Cc: Pavel Emelianov <xemul@parallels.com>
99 lines
2.1 KiB
C
99 lines
2.1 KiB
C
/* iplink_ipvlan.c IPVLAN device support
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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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* Authors: Mahesh Bandewar <maheshb@google.com>
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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 <sys/socket.h>
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#include <linux/if_link.h>
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#include "rt_names.h"
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#include "utils.h"
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#include "ip_common.h"
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static void ipvlan_explain(FILE *f)
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{
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fprintf(f, "Usage: ... ipvlan [ mode { l2 | l3 } ]\n");
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}
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static void explain(void)
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{
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ipvlan_explain(stderr);
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}
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static int mode_arg(void)
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{
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fprintf(stderr, "Error: argument of \"mode\" must be either \"l2\", "
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"or \"l3\"\n");
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return -1;
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}
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static int ipvlan_parse_opt(struct link_util *lu, int argc, char **argv,
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struct nlmsghdr *n)
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{
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while (argc > 0) {
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if (matches(*argv, "mode") == 0) {
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__u16 mode = 0;
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NEXT_ARG();
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if (strcmp(*argv, "l2") == 0)
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mode = IPVLAN_MODE_L2;
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else if (strcmp(*argv, "l3") == 0)
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mode = IPVLAN_MODE_L3;
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else
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return mode_arg();
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addattr16(n, 1024, IFLA_IPVLAN_MODE, mode);
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} else if (matches(*argv, "help") == 0) {
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explain();
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return -1;
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} else {
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fprintf(stderr, "ipvlan: unknown option \"%s\"?\n",
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*argv);
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explain();
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return -1;
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}
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argc--, argv++;
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}
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return 0;
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}
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static void ipvlan_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
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{
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if (!tb)
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return;
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if (tb[IFLA_IPVLAN_MODE]) {
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if (RTA_PAYLOAD(tb[IFLA_IPVLAN_MODE]) == sizeof(__u16)) {
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__u16 mode = rta_getattr_u16(tb[IFLA_IPVLAN_MODE]);
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fprintf(f, " mode %s ",
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mode == IPVLAN_MODE_L2 ? "l2" :
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mode == IPVLAN_MODE_L3 ? "l3" : "unknown");
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}
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}
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}
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static void ipvlan_print_help(struct link_util *lu, int argc, char **argv,
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FILE *f)
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{
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ipvlan_explain(f);
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}
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struct link_util ipvlan_link_util = {
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.id = "ipvlan",
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.maxattr = IFLA_IPVLAN_MAX,
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.parse_opt = ipvlan_parse_opt,
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.print_opt = ipvlan_print_opt,
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.print_help = ipvlan_print_help,
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};
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