ip/iplink_macvlan.c

   1 /*
   2  * iplink_vlan.c        VLAN device support
   3  *
   4  *              This program is free software; you can redistribute it and/or
   5  *              modify it under the terms of the GNU General Public License
   6  *              as published by the Free Software Foundation; either version
   7  *              2 of the License, or (at your option) any later version.
   8  *
   9  * Authors:     Patrick McHardy <kaber@trash.net>
  10  *              Arnd Bergmann <arnd@arndb.de>
  11  */
  12
  13 #include <stdio.h>
  14 #include <stdlib.h>
  15 #include <string.h>
  16 #include <sys/socket.h>
  17 #include <linux/if_link.h>
  18
  19 #include "rt_names.h"
  20 #include "utils.h"
  21 #include "ip_common.h"
  22
  23 static void explain(void)
  24 {
  25         fprintf(stderr,
  26                 "Usage: ... macvlan mode { private | vepa | bridge | passthru }\n"
  27         );
  28 }
  29
  30 static int mode_arg(void)
  31 {
  32         fprintf(stderr, "Error: argument of \"mode\" must be \"private\", "
  33                 "\"vepa\", \"bridge\" or \"passthru\" \n");
  34         return -1;
  35 }
  36
  37 static int macvlan_parse_opt(struct link_util *lu, int argc, char **argv,
  38                           struct nlmsghdr *n)
  39 {
  40         while (argc > 0) {
  41                 if (matches(*argv, "mode") == 0) {
  42                         __u32 mode = 0;
  43                         NEXT_ARG();
  44
  45                         if (strcmp(*argv, "private") == 0)
  46                                 mode = MACVLAN_MODE_PRIVATE;
  47                         else if (strcmp(*argv, "vepa") == 0)
  48                                 mode = MACVLAN_MODE_VEPA;
  49                         else if (strcmp(*argv, "bridge") == 0)
  50                                 mode = MACVLAN_MODE_BRIDGE;
  51                         else if (strcmp(*argv, "passthru") == 0)
  52                                 mode = MACVLAN_MODE_PASSTHRU;
  53                         else
  54                                 return mode_arg();
  55
  56                         addattr32(n, 1024, IFLA_MACVLAN_MODE, mode);
  57                 } else if (matches(*argv, "help") == 0) {
  58                         explain();
  59                         return -1;
  60                 } else {
  61                         fprintf(stderr, "macvlan: unknown option \"%s\"?\n", *argv);
  62                         explain();
  63                         return -1;
  64                 }
  65                 argc--, argv++;
  66         }
  67
  68         return 0;
  69 }
  70
  71 static void macvlan_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
  72 {
  73         __u32 mode;
  74
  75         if (!tb)
  76                 return;
  77
  78         if (!tb[IFLA_MACVLAN_MODE] ||
  79             RTA_PAYLOAD(tb[IFLA_MACVLAN_MODE]) < sizeof(__u32))
  80                 return;
  81
  82         mode = rta_getattr_u32(tb[IFLA_MACVLAN_MODE]);
  83         fprintf(f, " mode %s ",
  84                   mode == MACVLAN_MODE_PRIVATE ? "private"
  85                 : mode == MACVLAN_MODE_VEPA    ? "vepa"
  86                 : mode == MACVLAN_MODE_BRIDGE  ? "bridge"
  87                 : mode == MACVLAN_MODE_PASSTHRU  ? "passthru"
  88                 :                                "unknown");
  89 }
  90
  91 struct link_util macvlan_link_util = {
  92         .id             = "macvlan",
  93         .maxattr        = IFLA_MACVLAN_MAX,
  94         .parse_opt      = macvlan_parse_opt,
  95         .print_opt      = macvlan_print_opt,
  96 };