| /* |
| * iplink_macvlan.c macvlan/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. |
| * |
| * Authors: Patrick McHardy <kaber@trash.net> |
| * Arnd Bergmann <arnd@arndb.de> |
| */ |
| |
| #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" |
| |
| #define pfx_err(lu, ...) { \ |
| fprintf(stderr, "%s: ", lu->id); \ |
| fprintf(stderr, __VA_ARGS__); \ |
| fprintf(stderr, "\n"); \ |
| } |
| |
| static void print_explain(struct link_util *lu, FILE *f) |
| { |
| fprintf(f, |
| "Usage: ... %s mode { private | vepa | bridge | passthru [nopromisc] }\n", |
| lu->id |
| ); |
| } |
| |
| static void explain(struct link_util *lu) |
| { |
| print_explain(lu, stderr); |
| } |
| |
| static int mode_arg(const char *arg) |
| { |
| fprintf(stderr, "Error: argument of \"mode\" must be \"private\", " |
| "\"vepa\", \"bridge\" or \"passthru\", not \"%s\"\n", arg); |
| return -1; |
| } |
| |
| static int macvlan_parse_opt(struct link_util *lu, int argc, char **argv, |
| struct nlmsghdr *n) |
| { |
| __u32 mode = 0; |
| __u16 flags = 0; |
| |
| while (argc > 0) { |
| if (matches(*argv, "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(*argv); |
| } else if (matches(*argv, "nopromisc") == 0) { |
| flags |= MACVLAN_FLAG_NOPROMISC; |
| } else if (matches(*argv, "help") == 0) { |
| explain(lu); |
| return -1; |
| } else { |
| pfx_err(lu, "unknown option \"%s\"?", *argv); |
| explain(lu); |
| return -1; |
| } |
| argc--, argv++; |
| } |
| |
| if (mode) |
| addattr32(n, 1024, IFLA_MACVLAN_MODE, mode); |
| |
| if (flags) { |
| if (flags & MACVLAN_FLAG_NOPROMISC && |
| mode != MACVLAN_MODE_PASSTHRU) { |
| pfx_err(lu, "nopromisc flag only valid in passthru mode"); |
| explain(lu); |
| return -1; |
| } |
| addattr16(n, 1024, IFLA_MACVLAN_FLAGS, flags); |
| } |
| return 0; |
| } |
| |
| static void macvlan_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[]) |
| { |
| __u32 mode; |
| __u16 flags; |
| |
| if (!tb) |
| return; |
| |
| if (!tb[IFLA_MACVLAN_MODE] || |
| RTA_PAYLOAD(tb[IFLA_MACVLAN_MODE]) < sizeof(__u32)) |
| return; |
| |
| mode = rta_getattr_u32(tb[IFLA_MACVLAN_MODE]); |
| 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"); |
| |
| if (!tb[IFLA_MACVLAN_FLAGS] || |
| RTA_PAYLOAD(tb[IFLA_MACVLAN_FLAGS]) < sizeof(__u16)) |
| return; |
| |
| flags = rta_getattr_u16(tb[IFLA_MACVLAN_FLAGS]); |
| if (flags & MACVLAN_FLAG_NOPROMISC) |
| fprintf(f, "nopromisc "); |
| } |
| |
| static void macvlan_print_help(struct link_util *lu, int argc, char **argv, |
| FILE *f) |
| { |
| print_explain(lu, f); |
| } |
| |
| struct link_util macvlan_link_util = { |
| .id = "macvlan", |
| .maxattr = IFLA_MACVLAN_MAX, |
| .parse_opt = macvlan_parse_opt, |
| .print_opt = macvlan_print_opt, |
| .print_help = macvlan_print_help, |
| }; |
| |
| struct link_util macvtap_link_util = { |
| .id = "macvtap", |
| .maxattr = IFLA_MACVLAN_MAX, |
| .parse_opt = macvlan_parse_opt, |
| .print_opt = macvlan_print_opt, |
| .print_help = macvlan_print_help, |
| }; |