| /* |
| * iplink_macvtap.c macvtap 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. |
| */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <sys/socket.h> |
| #include <linux/if_link.h> |
| |
| #include "rt_names.h" |
| #include "utils.h" |
| #include "ip_common.h" |
| |
| static void explain(void) |
| { |
| fprintf(stderr, |
| "Usage: ... macvtap mode { private | vepa | bridge | passthru }\n" |
| ); |
| } |
| |
| static int mode_arg(void) |
| { |
| fprintf(stderr, "Error: argument of \"mode\" must be \"private\", " |
| "\"vepa\", \"bridge\" or \"passthru\" \n"); |
| return -1; |
| } |
| |
| static int macvtap_parse_opt(struct link_util *lu, int argc, char **argv, |
| struct nlmsghdr *n) |
| { |
| while (argc > 0) { |
| if (matches(*argv, "mode") == 0) { |
| __u32 mode = 0; |
| NEXT_ARG(); |
| |
| if (strcmp(*argv, "private") == 0) |
| mode = MACVLAN_MODE_PRIVATE; |
| else if (strcmp(*argv, "vepa") == 0) |
| mode = MACVLAN_MODE_VEPA; |
| else if (strcmp(*argv, "bridge") == 0) |
| mode = MACVLAN_MODE_BRIDGE; |
| else if (strcmp(*argv, "passthru") == 0) |
| mode = MACVLAN_MODE_PASSTHRU; |
| else |
| return mode_arg(); |
| |
| addattr32(n, 1024, IFLA_MACVLAN_MODE, mode); |
| } else if (matches(*argv, "help") == 0) { |
| explain(); |
| return -1; |
| } else { |
| fprintf(stderr, "macvtap: what is \"%s\"?\n", *argv); |
| explain(); |
| return -1; |
| } |
| argc--, argv++; |
| } |
| |
| return 0; |
| } |
| |
| static void macvtap_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[]) |
| { |
| __u32 mode; |
| |
| if (!tb) |
| return; |
| |
| if (!tb[IFLA_MACVLAN_MODE] || |
| RTA_PAYLOAD(tb[IFLA_MACVLAN_MODE]) < sizeof(__u32)) |
| return; |
| |
| mode = rta_getattr_u32(tb[IFLA_VLAN_ID]); |
| fprintf(f, " mode %s ", |
| mode == MACVLAN_MODE_PRIVATE ? "private" |
| : mode == MACVLAN_MODE_VEPA ? "vepa" |
| : mode == MACVLAN_MODE_BRIDGE ? "bridge" |
| : mode == MACVLAN_MODE_PASSTHRU ? "passthru" |
| : "unknown"); |
| } |
| |
| struct link_util macvtap_link_util = { |
| .id = "macvtap", |
| .maxattr = IFLA_MACVLAN_MAX, |
| .parse_opt = macvtap_parse_opt, |
| .print_opt = macvtap_print_opt, |
| }; |