diff options
Diffstat (limited to 'ip/iplink_vlan.c')
| -rw-r--r-- | ip/iplink_vlan.c | 276 |
1 files changed, 276 insertions, 0 deletions
diff --git a/ip/iplink_vlan.c b/ip/iplink_vlan.c new file mode 100644 index 0000000..4ac5bc0 --- /dev/null +++ b/ip/iplink_vlan.c @@ -0,0 +1,276 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * iplink_vlan.c VLAN device support + * + * Authors: Patrick McHardy <kaber@trash.net> + */ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <linux/if_vlan.h> + +#include "rt_names.h" +#include "utils.h" +#include "ip_common.h" + +static void print_explain(FILE *f) +{ + fprintf(f, + "Usage: ... vlan id VLANID\n" + " [ protocol VLANPROTO ]\n" + " [ reorder_hdr { on | off } ]\n" + " [ gvrp { on | off } ]\n" + " [ mvrp { on | off } ]\n" + " [ loose_binding { on | off } ]\n" + " [ bridge_binding { on | off } ]\n" + " [ ingress-qos-map QOS-MAP ]\n" + " [ egress-qos-map QOS-MAP ]\n" + "\n" + "VLANID := 0-4095\n" + "VLANPROTO: [ 802.1Q | 802.1ad ]\n" + "QOS-MAP := [ QOS-MAP ] QOS-MAPPING\n" + "QOS-MAPPING := FROM:TO\n" + ); +} + +static void explain(void) +{ + print_explain(stderr); +} + +static int on_off(const char *msg, const char *arg) +{ + fprintf(stderr, "Error: argument of \"%s\" must be \"on\" or \"off\", not \"%s\"\n", msg, arg); + return -1; +} + +static int parse_qos_mapping(__u32 key, char *value, void *data) +{ + struct nlmsghdr *n = data; + struct ifla_vlan_qos_mapping m = { + .from = key, + }; + + if (get_u32(&m.to, value, 0)) + return 1; + + return addattr_l(n, 1024, IFLA_VLAN_QOS_MAPPING, &m, sizeof(m)); +} + +static int vlan_parse_qos_map(int *argcp, char ***argvp, struct nlmsghdr *n, + int attrtype) +{ + struct rtattr *tail; + + tail = addattr_nest(n, 1024, attrtype); + + if (parse_mapping(argcp, argvp, false, &parse_qos_mapping, n)) + return 1; + + addattr_nest_end(n, tail); + return 0; +} + +static int vlan_parse_opt(struct link_util *lu, int argc, char **argv, + struct nlmsghdr *n) +{ + struct ifla_vlan_flags flags = { 0 }; + __u16 id, proto; + + while (argc > 0) { + if (matches(*argv, "protocol") == 0) { + NEXT_ARG(); + if (ll_proto_a2n(&proto, *argv)) + invarg("protocol is invalid", *argv); + addattr_l(n, 1024, IFLA_VLAN_PROTOCOL, &proto, 2); + } else if (matches(*argv, "id") == 0) { + NEXT_ARG(); + if (get_u16(&id, *argv, 0)) + invarg("id is invalid", *argv); + addattr_l(n, 1024, IFLA_VLAN_ID, &id, 2); + } else if (matches(*argv, "reorder_hdr") == 0) { + NEXT_ARG(); + flags.mask |= VLAN_FLAG_REORDER_HDR; + if (strcmp(*argv, "on") == 0) + flags.flags |= VLAN_FLAG_REORDER_HDR; + else if (strcmp(*argv, "off") == 0) + flags.flags &= ~VLAN_FLAG_REORDER_HDR; + else + return on_off("reorder_hdr", *argv); + } else if (matches(*argv, "gvrp") == 0) { + NEXT_ARG(); + flags.mask |= VLAN_FLAG_GVRP; + if (strcmp(*argv, "on") == 0) + flags.flags |= VLAN_FLAG_GVRP; + else if (strcmp(*argv, "off") == 0) + flags.flags &= ~VLAN_FLAG_GVRP; + else + return on_off("gvrp", *argv); + } else if (matches(*argv, "mvrp") == 0) { + NEXT_ARG(); + flags.mask |= VLAN_FLAG_MVRP; + if (strcmp(*argv, "on") == 0) + flags.flags |= VLAN_FLAG_MVRP; + else if (strcmp(*argv, "off") == 0) + flags.flags &= ~VLAN_FLAG_MVRP; + else + return on_off("mvrp", *argv); + } else if (matches(*argv, "loose_binding") == 0) { + NEXT_ARG(); + flags.mask |= VLAN_FLAG_LOOSE_BINDING; + if (strcmp(*argv, "on") == 0) + flags.flags |= VLAN_FLAG_LOOSE_BINDING; + else if (strcmp(*argv, "off") == 0) + flags.flags &= ~VLAN_FLAG_LOOSE_BINDING; + else + return on_off("loose_binding", *argv); + } else if (matches(*argv, "bridge_binding") == 0) { + NEXT_ARG(); + flags.mask |= VLAN_FLAG_BRIDGE_BINDING; + if (strcmp(*argv, "on") == 0) + flags.flags |= VLAN_FLAG_BRIDGE_BINDING; + else if (strcmp(*argv, "off") == 0) + flags.flags &= ~VLAN_FLAG_BRIDGE_BINDING; + else + return on_off("bridge_binding", *argv); + } else if (matches(*argv, "ingress-qos-map") == 0) { + NEXT_ARG(); + if (vlan_parse_qos_map(&argc, &argv, n, + IFLA_VLAN_INGRESS_QOS)) + invarg("invalid ingress-qos-map", *argv); + continue; + } else if (matches(*argv, "egress-qos-map") == 0) { + NEXT_ARG(); + if (vlan_parse_qos_map(&argc, &argv, n, + IFLA_VLAN_EGRESS_QOS)) + invarg("invalid egress-qos-map", *argv); + continue; + } else if (matches(*argv, "help") == 0) { + explain(); + return -1; + } else { + fprintf(stderr, "vlan: unknown command \"%s\"?\n", *argv); + explain(); + return -1; + } + argc--, argv++; + } + + if (flags.mask) + addattr_l(n, 1024, IFLA_VLAN_FLAGS, &flags, sizeof(flags)); + + return 0; +} + +static void vlan_print_map(FILE *f, + const char *name_json, + const char *name_fp, + struct rtattr *attr) +{ + struct ifla_vlan_qos_mapping *m; + struct rtattr *i; + int rem; + + open_json_array(PRINT_JSON, name_json); + print_nl(); + print_string(PRINT_FP, NULL, " %s { ", name_fp); + + rem = RTA_PAYLOAD(attr); + for (i = RTA_DATA(attr); RTA_OK(i, rem); i = RTA_NEXT(i, rem)) { + m = RTA_DATA(i); + + if (is_json_context()) { + open_json_object(NULL); + print_uint(PRINT_JSON, "from", NULL, m->from); + print_uint(PRINT_JSON, "to", NULL, m->to); + close_json_object(); + } else { + fprintf(f, "%u:%u ", m->from, m->to); + } + } + + close_json_array(PRINT_JSON, NULL); + print_string(PRINT_FP, NULL, "%s ", "}"); +} + +static void vlan_print_flags(FILE *fp, __u32 flags) +{ + open_json_array(PRINT_ANY, is_json_context() ? "flags" : "<"); +#define _PF(f) if (flags & VLAN_FLAG_##f) { \ + flags &= ~VLAN_FLAG_##f; \ + print_string(PRINT_ANY, NULL, flags ? "%s," : "%s", #f); \ + } + _PF(REORDER_HDR); + _PF(GVRP); + _PF(MVRP); + _PF(LOOSE_BINDING); + _PF(BRIDGE_BINDING); +#undef _PF + if (flags) + print_hex(PRINT_ANY, NULL, "%x", flags); + close_json_array(PRINT_ANY, "> "); +} + +static void vlan_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[]) +{ + struct ifla_vlan_flags *flags; + + SPRINT_BUF(b1); + + if (!tb) + return; + + if (tb[IFLA_VLAN_PROTOCOL] && + RTA_PAYLOAD(tb[IFLA_VLAN_PROTOCOL]) < sizeof(__u16)) + return; + if (!tb[IFLA_VLAN_ID] || + RTA_PAYLOAD(tb[IFLA_VLAN_ID]) < sizeof(__u16)) + return; + + if (tb[IFLA_VLAN_PROTOCOL]) + print_string(PRINT_ANY, + "protocol", + "protocol %s ", + ll_proto_n2a( + rta_getattr_u16(tb[IFLA_VLAN_PROTOCOL]), + b1, sizeof(b1))); + else + print_string(PRINT_ANY, "protocol", "protocol %s ", "802.1q"); + + print_uint(PRINT_ANY, + "id", + "id %u ", + rta_getattr_u16(tb[IFLA_VLAN_ID])); + + if (tb[IFLA_VLAN_FLAGS]) { + if (RTA_PAYLOAD(tb[IFLA_VLAN_FLAGS]) < sizeof(*flags)) + return; + flags = RTA_DATA(tb[IFLA_VLAN_FLAGS]); + vlan_print_flags(f, flags->flags); + } + if (tb[IFLA_VLAN_INGRESS_QOS]) + vlan_print_map(f, + "ingress_qos", + "ingress-qos-map", + tb[IFLA_VLAN_INGRESS_QOS]); + if (tb[IFLA_VLAN_EGRESS_QOS]) + vlan_print_map(f, + "egress_qos", + "egress-qos-map", + tb[IFLA_VLAN_EGRESS_QOS]); +} + +static void vlan_print_help(struct link_util *lu, int argc, char **argv, + FILE *f) +{ + print_explain(f); +} + +struct link_util vlan_link_util = { + .id = "vlan", + .maxattr = IFLA_VLAN_MAX, + .parse_opt = vlan_parse_opt, + .print_opt = vlan_print_opt, + .print_help = vlan_print_help, +}; |