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 */ 11 12 #include <stdio.h> 13 #include <stdlib.h> 14 #include <string.h> 15 #include <linux/if_vlan.h> 16 17 #include "rt_names.h" 18 #include "utils.h" 19 #include "ip_common.h" 20 21 static void explain(void) 22 { 23 fprintf(stderr, 24 "Usage: ... vlan id VLANID [ FLAG-LIST ]\n" 25 " [ ingress-qos-map QOS-MAP ] [ egress-qos-map QOS-MAP ]\n" 26 "\n" 27 "VLANID := 0-4095\n" 28 "FLAG-LIST := [ FLAG-LIST ] FLAG\n" 29 "FLAG := [ reorder_hdr { on | off } ] [ gvrp { on | off } ]\n" 30 "QOS-MAP := [ QOS-MAP ] QOS-MAPPING\n" 31 "QOS-MAPPING := FROM:TO\n" 32 ); 33 } 34 35 static int on_off(char *msg) 36 { 37 fprintf(stderr, "Error: argument of \"%s\" must be \"on\" or \"off\"\n", msg); 38 return -1; 39 } 40 41 static int vlan_parse_qos_map(int *argcp, char ***argvp, struct nlmsghdr *n, 42 int attrtype) 43 { 44 int argc = *argcp; 45 char **argv = *argvp; 46 struct ifla_vlan_qos_mapping m; 47 struct rtattr *tail; 48 49 tail = NLMSG_TAIL(n); 50 addattr_l(n, 1024, attrtype, NULL, 0); 51 52 while (argc > 0) { 53 char *colon = strchr(*argv, ':'); 54 55 if (!colon) 56 break; 57 *colon = '\0'; 58 59 if (get_u32(&m.from, *argv, 0)) 60 return 1; 61 if (get_u32(&m.to, colon + 1, 0)) 62 return 1; 63 argc--, argv++; 64 65 addattr_l(n, 1024, IFLA_VLAN_QOS_MAPPING, &m, sizeof(m)); 66 } 67 68 tail->rta_len = (void *) NLMSG_TAIL(n) - (void *)tail; 69 70 *argcp = argc; 71 *argvp = argv; 72 return 0; 73 } 74 75 static int vlan_parse_opt(struct link_util *lu, int argc, char **argv, 76 struct nlmsghdr *n) 77 { 78 struct ifla_vlan_flags flags = { 0 }; 79 __u16 id; 80 81 while (argc > 0) { 82 if (matches(*argv, "id") == 0) { 83 NEXT_ARG(); 84 if (get_u16(&id, *argv, 0)) 85 invarg("id is invalid", *argv); 86 addattr_l(n, 1024, IFLA_VLAN_ID, &id, 2); 87 } else if (matches(*argv, "reorder_hdr") == 0) { 88 NEXT_ARG(); 89 flags.mask |= VLAN_FLAG_REORDER_HDR; 90 if (strcmp(*argv, "on") == 0) 91 flags.flags |= VLAN_FLAG_REORDER_HDR; 92 else if (strcmp(*argv, "off") == 0) 93 flags.flags &= ~VLAN_FLAG_REORDER_HDR; 94 else 95 return on_off("reorder_hdr"); 96 } else if (matches(*argv, "gvrp") == 0) { 97 NEXT_ARG(); 98 flags.mask |= VLAN_FLAG_GVRP; 99 if (strcmp(*argv, "on") == 0) 100 flags.flags |= VLAN_FLAG_GVRP; 101 else if (strcmp(*argv, "off") == 0) 102 flags.flags &= ~VLAN_FLAG_GVRP; 103 else 104 return on_off("gvrp"); 105 } else if (matches(*argv, "ingress-qos-map") == 0) { 106 NEXT_ARG(); 107 if (vlan_parse_qos_map(&argc, &argv, n, 108 IFLA_VLAN_INGRESS_QOS)) 109 invarg("invalid ingress-qos-map", *argv); 110 continue; 111 } else if (matches(*argv, "egress-qos-map") == 0) { 112 NEXT_ARG(); 113 if (vlan_parse_qos_map(&argc, &argv, n, 114 IFLA_VLAN_EGRESS_QOS)) 115 invarg("invalid egress-qos-map", *argv); 116 continue; 117 } else if (matches(*argv, "help") == 0) { 118 explain(); 119 return -1; 120 } else { 121 fprintf(stderr, "vlan: what is \"%s\"?\n", *argv); 122 explain(); 123 return -1; 124 } 125 argc--, argv++; 126 } 127 128 if (flags.mask) 129 addattr_l(n, 1024, IFLA_VLAN_FLAGS, &flags, sizeof(flags)); 130 131 return 0; 132 } 133 134 static void vlan_print_map(FILE *f, char *name, struct rtattr *attr) 135 { 136 struct ifla_vlan_qos_mapping *m; 137 struct rtattr *i; 138 int rem; 139 140 fprintf(f, "\n %s { ", name); 141 142 rem = RTA_PAYLOAD(attr); 143 for (i = RTA_DATA(attr); RTA_OK(i, rem); i = RTA_NEXT(i, rem)) { 144 m = RTA_DATA(i); 145 fprintf(f, "%u:%u ", m->from, m->to); 146 } 147 fprintf(f, "} "); 148 } 149 150 static void vlan_print_flags(FILE *fp, __u32 flags) 151 { 152 fprintf(fp, "<"); 153 #define _PF(f) if (flags & VLAN_FLAG_##f) { \ 154 flags &= ~ VLAN_FLAG_##f; \ 155 fprintf(fp, #f "%s", flags ? "," : ""); \ 156 } 157 _PF(REORDER_HDR); 158 _PF(GVRP); 159 #undef _PF 160 if (flags) 161 fprintf(fp, "%x", flags); 162 fprintf(fp, "> "); 163 } 164 165 static void vlan_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[]) 166 { 167 struct ifla_vlan_flags *flags; 168 if (!tb) 169 return; 170 171 if (!tb[IFLA_VLAN_ID] || 172 RTA_PAYLOAD(tb[IFLA_VLAN_ID]) < sizeof(__u16)) 173 return; 174 175 fprintf(f, "id %u ", *(__u16 *)RTA_DATA(tb[IFLA_VLAN_ID])); 176 177 if (tb[IFLA_VLAN_FLAGS]) { 178 if (RTA_PAYLOAD(tb[IFLA_VLAN_FLAGS]) < sizeof(*flags)) 179 return; 180 flags = RTA_DATA(tb[IFLA_VLAN_FLAGS]); 181 vlan_print_flags(f, flags->flags); 182 } 183 if (tb[IFLA_VLAN_INGRESS_QOS]) 184 vlan_print_map(f, "ingress-qos-map", tb[IFLA_VLAN_INGRESS_QOS]); 185 if (tb[IFLA_VLAN_EGRESS_QOS]) 186 vlan_print_map(f, "egress-qos-map", tb[IFLA_VLAN_EGRESS_QOS]); 187 } 188 189 struct link_util vlan_link_util = { 190 .id = "vlan", 191 .maxattr = IFLA_VLAN_MAX, 192 .parse_opt = vlan_parse_opt, 193 .print_opt = vlan_print_opt, 194 }; 195
