275 lines
6.7 KiB
C
275 lines
6.7 KiB
C
/*
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* iplink_macvlan.c macvlan/macvtap device support
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* Authors: Patrick McHardy <kaber@trash.net>
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* Arnd Bergmann <arnd@arndb.de>
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/socket.h>
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#include <linux/if_link.h>
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#include <linux/if_ether.h>
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#include "rt_names.h"
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#include "utils.h"
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#include "ip_common.h"
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#define pfx_err(lu, ...) { \
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fprintf(stderr, "%s: ", lu->id); \
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fprintf(stderr, __VA_ARGS__); \
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fprintf(stderr, "\n"); \
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}
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static void print_explain(struct link_util *lu, FILE *f)
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{
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fprintf(f,
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"Usage: ... %s mode MODE [flag MODE_FLAG] MODE_OPTS\n"
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"\n"
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"MODE: private | vepa | bridge | passthru | source\n"
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"MODE_FLAG: null | nopromisc\n"
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"MODE_OPTS: for mode \"source\":\n"
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"\tmacaddr { { add | del } <macaddr> | set [ <macaddr> [ <macaddr> ... ] ] | flush }\n",
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lu->id
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);
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}
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static void explain(struct link_util *lu)
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{
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print_explain(lu, stderr);
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}
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static int mode_arg(const char *arg)
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{
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fprintf(stderr,
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"Error: argument of \"mode\" must be \"private\", \"vepa\", \"bridge\", \"passthru\" or \"source\", not \"%s\"\n",
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arg);
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return -1;
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}
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static int flag_arg(const char *arg)
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{
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fprintf(stderr,
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"Error: argument of \"flag\" must be \"nopromisc\" or \"null\", not \"%s\"\n",
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arg);
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return -1;
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}
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static int macvlan_parse_opt(struct link_util *lu, int argc, char **argv,
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struct nlmsghdr *n)
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{
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__u32 mode = 0;
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__u16 flags = 0;
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__u32 mac_mode = 0;
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int has_flags = 0;
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char mac[ETH_ALEN];
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struct rtattr *nmac;
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while (argc > 0) {
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if (matches(*argv, "mode") == 0) {
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NEXT_ARG();
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if (strcmp(*argv, "private") == 0)
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mode = MACVLAN_MODE_PRIVATE;
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else if (strcmp(*argv, "vepa") == 0)
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mode = MACVLAN_MODE_VEPA;
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else if (strcmp(*argv, "bridge") == 0)
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mode = MACVLAN_MODE_BRIDGE;
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else if (strcmp(*argv, "passthru") == 0)
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mode = MACVLAN_MODE_PASSTHRU;
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else if (strcmp(*argv, "source") == 0)
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mode = MACVLAN_MODE_SOURCE;
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else
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return mode_arg(*argv);
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} else if (matches(*argv, "flag") == 0) {
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NEXT_ARG();
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if (strcmp(*argv, "nopromisc") == 0)
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flags |= MACVLAN_FLAG_NOPROMISC;
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else if (strcmp(*argv, "null") == 0)
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flags |= 0;
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else
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return flag_arg(*argv);
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has_flags = 1;
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} else if (matches(*argv, "macaddr") == 0) {
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NEXT_ARG();
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if (strcmp(*argv, "add") == 0) {
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mac_mode = MACVLAN_MACADDR_ADD;
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} else if (strcmp(*argv, "del") == 0) {
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mac_mode = MACVLAN_MACADDR_DEL;
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} else if (strcmp(*argv, "set") == 0) {
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mac_mode = MACVLAN_MACADDR_SET;
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} else if (strcmp(*argv, "flush") == 0) {
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mac_mode = MACVLAN_MACADDR_FLUSH;
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} else {
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explain(lu);
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return -1;
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}
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addattr32(n, 1024, IFLA_MACVLAN_MACADDR_MODE, mac_mode);
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if (mac_mode == MACVLAN_MACADDR_ADD ||
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mac_mode == MACVLAN_MACADDR_DEL) {
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NEXT_ARG();
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if (ll_addr_a2n(mac, sizeof(mac),
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*argv) != ETH_ALEN)
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return -1;
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addattr_l(n, 1024, IFLA_MACVLAN_MACADDR, &mac,
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ETH_ALEN);
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}
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if (mac_mode == MACVLAN_MACADDR_SET) {
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nmac = addattr_nest(n, 1024,
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IFLA_MACVLAN_MACADDR_DATA);
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while (NEXT_ARG_OK()) {
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NEXT_ARG_FWD();
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if (ll_addr_a2n(mac, sizeof(mac),
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*argv) != ETH_ALEN) {
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PREV_ARG();
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break;
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}
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addattr_l(n, 1024, IFLA_MACVLAN_MACADDR,
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&mac, ETH_ALEN);
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}
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addattr_nest_end(n, nmac);
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}
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} else if (matches(*argv, "nopromisc") == 0) {
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flags |= MACVLAN_FLAG_NOPROMISC;
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has_flags = 1;
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} else if (matches(*argv, "help") == 0) {
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explain(lu);
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return -1;
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} else {
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pfx_err(lu, "unknown option \"%s\"?", *argv);
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explain(lu);
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return -1;
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}
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argc--, argv++;
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}
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if (mode)
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addattr32(n, 1024, IFLA_MACVLAN_MODE, mode);
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if (has_flags) {
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if (flags & MACVLAN_FLAG_NOPROMISC &&
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mode != MACVLAN_MODE_PASSTHRU) {
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pfx_err(lu, "nopromisc flag only valid in passthru mode");
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explain(lu);
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return -1;
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}
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addattr16(n, 1024, IFLA_MACVLAN_FLAGS, flags);
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}
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return 0;
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}
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static void macvlan_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
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{
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__u32 mode;
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__u16 flags;
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__u32 count;
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unsigned char *addr;
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int len;
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struct rtattr *rta;
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if (!tb)
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return;
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if (!tb[IFLA_MACVLAN_MODE] ||
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RTA_PAYLOAD(tb[IFLA_MACVLAN_MODE]) < sizeof(__u32))
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return;
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mode = rta_getattr_u32(tb[IFLA_MACVLAN_MODE]);
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print_string(PRINT_ANY,
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"mode",
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"mode %s ",
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mode == MACVLAN_MODE_PRIVATE ? "private"
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: mode == MACVLAN_MODE_VEPA ? "vepa"
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: mode == MACVLAN_MODE_BRIDGE ? "bridge"
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: mode == MACVLAN_MODE_PASSTHRU ? "passthru"
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: mode == MACVLAN_MODE_SOURCE ? "source"
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: "unknown");
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if (!tb[IFLA_MACVLAN_FLAGS] ||
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RTA_PAYLOAD(tb[IFLA_MACVLAN_FLAGS]) < sizeof(__u16))
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flags = 0;
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else
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flags = rta_getattr_u16(tb[IFLA_MACVLAN_FLAGS]);
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if (flags & MACVLAN_FLAG_NOPROMISC)
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print_bool(PRINT_ANY, "nopromisc", "nopromisc ", true);
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/* in source mode, there are more options to print */
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if (mode != MACVLAN_MODE_SOURCE)
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return;
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if (!tb[IFLA_MACVLAN_MACADDR_COUNT] ||
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RTA_PAYLOAD(tb[IFLA_MACVLAN_MACADDR_COUNT]) < sizeof(__u32))
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return;
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count = rta_getattr_u32(tb[IFLA_MACVLAN_MACADDR_COUNT]);
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print_int(PRINT_ANY, "macaddr_count", "remotes (%d) ", count);
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if (!tb[IFLA_MACVLAN_MACADDR_DATA])
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return;
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rta = RTA_DATA(tb[IFLA_MACVLAN_MACADDR_DATA]);
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len = RTA_PAYLOAD(tb[IFLA_MACVLAN_MACADDR_DATA]);
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open_json_array(PRINT_JSON, "macaddr_data");
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for (; RTA_OK(rta, len); rta = RTA_NEXT(rta, len)) {
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if (rta->rta_type != IFLA_MACVLAN_MACADDR ||
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RTA_PAYLOAD(rta) < 6)
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continue;
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addr = RTA_DATA(rta);
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if (is_json_context()) {
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SPRINT_BUF(b1);
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snprintf(b1, sizeof(b1),
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"%.2x:%.2x:%.2x:%.2x:%.2x:%.2x", addr[0],
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addr[1], addr[2], addr[3], addr[4], addr[5]);
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print_string(PRINT_JSON, NULL, NULL, b1);
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} else {
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fprintf(f, "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x ", addr[0],
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addr[1], addr[2], addr[3], addr[4], addr[5]);
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}
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}
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close_json_array(PRINT_JSON, NULL);
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}
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static void macvlan_print_help(struct link_util *lu, int argc, char **argv,
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FILE *f)
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{
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print_explain(lu, f);
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}
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struct link_util macvlan_link_util = {
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.id = "macvlan",
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.maxattr = IFLA_MACVLAN_MAX,
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.parse_opt = macvlan_parse_opt,
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.print_opt = macvlan_print_opt,
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.print_help = macvlan_print_help,
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};
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struct link_util macvtap_link_util = {
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.id = "macvtap",
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.maxattr = IFLA_MACVLAN_MAX,
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.parse_opt = macvlan_parse_opt,
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.print_opt = macvlan_print_opt,
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.print_help = macvlan_print_help,
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};
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