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 (at) trash.net> 10 * Arnd Bergmann <arnd (at) 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 }\n" 27 ); 28 } 29 30 static int mode_arg(void) 31 { 32 fprintf(stderr, "Error: argument of \"mode\" must be \"private\", " 33 "\"vepa\" or \"bridge\"\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 52 return mode_arg(); 53 54 addattr32(n, 1024, IFLA_MACVLAN_MODE, mode); 55 } else if (matches(*argv, "help") == 0) { 56 explain(); 57 return -1; 58 } else { 59 fprintf(stderr, "macvlan: what is \"%s\"?\n", *argv); 60 explain(); 61 return -1; 62 } 63 argc--, argv++; 64 } 65 66 return 0; 67 } 68 69 static void macvlan_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[]) 70 { 71 __u32 mode; 72 73 if (!tb) 74 return; 75 76 if (!tb[IFLA_MACVLAN_MODE] || 77 RTA_PAYLOAD(tb[IFLA_MACVLAN_MODE]) < sizeof(__u32)) 78 return; 79 80 mode = *(__u32 *)RTA_DATA(tb[IFLA_VLAN_ID]); 81 fprintf(f, " mode %s ", 82 mode == MACVLAN_MODE_PRIVATE ? "private" 83 : mode == MACVLAN_MODE_VEPA ? "vepa" 84 : mode == MACVLAN_MODE_BRIDGE ? "bridge" 85 : "unknown"); 86 } 87 88 struct link_util macvlan_link_util = { 89 .id = "macvlan", 90 .maxattr = IFLA_MACVLAN_MAX, 91 .parse_opt = macvlan_parse_opt, 92 .print_opt = macvlan_print_opt, 93 }; 94
