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-rw-r--r--ip/iplink_macvlan.c329
1 files changed, 329 insertions, 0 deletions
diff --git a/ip/iplink_macvlan.c b/ip/iplink_macvlan.c
new file mode 100644
index 0000000..6bdc76d
--- /dev/null
+++ b/ip/iplink_macvlan.c
@@ -0,0 +1,329 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * iplink_macvlan.c macvlan/macvtap device support
+ *
+ * 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 <linux/if_ether.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 MODE [flag MODE_FLAG] MODE_OPTS [bcqueuelen BC_QUEUE_LEN] [bclim BCLIM]\n"
+ "\n"
+ "MODE: private | vepa | bridge | passthru | source\n"
+ "MODE_FLAG: null | nopromisc | nodst\n"
+ "MODE_OPTS: for mode \"source\":\n"
+ "\tmacaddr { { add | del } <macaddr> | set [ <macaddr> [ <macaddr> ... ] ] | flush }\n"
+ "BC_QUEUE_LEN: Length of the rx queue for broadcast/multicast: [0-4294967295]\n"
+ "BCLIM: Threshold for broadcast queueing: 32-bit integer\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\", \"passthru\" or \"source\", not \"%s\"\n",
+ arg);
+ return -1;
+}
+
+static int flag_arg(const char *arg)
+{
+ fprintf(stderr,
+ "Error: argument of \"flag\" must be \"nopromisc\", \"nodst\" or \"null\", not \"%s\"\n",
+ arg);
+ return -1;
+}
+
+static int bc_queue_len_arg(const char *arg)
+{
+ fprintf(stderr,
+ "Error: argument of \"bcqueuelen\" must be a positive integer [0-4294967295], not \"%s\"\n",
+ arg);
+ return -1;
+}
+
+static int bclim_arg(const char *arg)
+{
+ fprintf(stderr, "Error: illegal value for \"bclim\": \"%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;
+ __u32 mac_mode = 0;
+ int has_flags = 0;
+ char mac[ETH_ALEN];
+ struct rtattr *nmac;
+
+ 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 if (strcmp(*argv, "source") == 0)
+ mode = MACVLAN_MODE_SOURCE;
+ else
+ return mode_arg(*argv);
+ } else if (matches(*argv, "flag") == 0) {
+ NEXT_ARG();
+
+ if (strcmp(*argv, "nopromisc") == 0)
+ flags |= MACVLAN_FLAG_NOPROMISC;
+ else if (strcmp(*argv, "nodst") == 0)
+ flags |= MACVLAN_FLAG_NODST;
+ else if (strcmp(*argv, "null") == 0)
+ flags |= 0;
+ else
+ return flag_arg(*argv);
+
+ has_flags = 1;
+
+ } else if (matches(*argv, "macaddr") == 0) {
+ NEXT_ARG();
+
+ if (strcmp(*argv, "add") == 0) {
+ mac_mode = MACVLAN_MACADDR_ADD;
+ } else if (strcmp(*argv, "del") == 0) {
+ mac_mode = MACVLAN_MACADDR_DEL;
+ } else if (strcmp(*argv, "set") == 0) {
+ mac_mode = MACVLAN_MACADDR_SET;
+ } else if (strcmp(*argv, "flush") == 0) {
+ mac_mode = MACVLAN_MACADDR_FLUSH;
+ } else {
+ explain(lu);
+ return -1;
+ }
+
+ addattr32(n, 1024, IFLA_MACVLAN_MACADDR_MODE, mac_mode);
+
+ if (mac_mode == MACVLAN_MACADDR_ADD ||
+ mac_mode == MACVLAN_MACADDR_DEL) {
+ NEXT_ARG();
+
+ if (ll_addr_a2n(mac, sizeof(mac),
+ *argv) != ETH_ALEN)
+ return -1;
+
+ addattr_l(n, 1024, IFLA_MACVLAN_MACADDR, &mac,
+ ETH_ALEN);
+ }
+
+ if (mac_mode == MACVLAN_MACADDR_SET) {
+ nmac = addattr_nest(n, 1024,
+ IFLA_MACVLAN_MACADDR_DATA);
+ while (NEXT_ARG_OK()) {
+ NEXT_ARG_FWD();
+
+ if (ll_addr_a2n(mac, sizeof(mac),
+ *argv) != ETH_ALEN) {
+ PREV_ARG();
+ break;
+ }
+
+ addattr_l(n, 1024, IFLA_MACVLAN_MACADDR,
+ &mac, ETH_ALEN);
+ }
+ addattr_nest_end(n, nmac);
+ }
+ } else if (matches(*argv, "nopromisc") == 0) {
+ flags |= MACVLAN_FLAG_NOPROMISC;
+ has_flags = 1;
+ } else if (matches(*argv, "nodst") == 0) {
+ flags |= MACVLAN_FLAG_NODST;
+ has_flags = 1;
+ } else if (matches(*argv, "bcqueuelen") == 0) {
+ __u32 bc_queue_len;
+ NEXT_ARG();
+
+ if (get_u32(&bc_queue_len, *argv, 0)) {
+ return bc_queue_len_arg(*argv);
+ }
+ addattr32(n, 1024, IFLA_MACVLAN_BC_QUEUE_LEN, bc_queue_len);
+ } else if (!strcmp(*argv, "bclim")) {
+ __s32 bclim;
+ NEXT_ARG();
+
+ if (get_s32(&bclim, *argv, 0)) {
+ return bclim_arg(*argv);
+ }
+ addattr_l(n, 1024, IFLA_MACVLAN_BC_CUTOFF,
+ &bclim, sizeof(bclim));
+ } 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 (has_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;
+ __u32 count;
+ unsigned char *addr;
+ int len;
+ struct rtattr *rta;
+
+ 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]);
+ print_string(PRINT_ANY,
+ "mode",
+ "mode %s ",
+ mode == MACVLAN_MODE_PRIVATE ? "private"
+ : mode == MACVLAN_MODE_VEPA ? "vepa"
+ : mode == MACVLAN_MODE_BRIDGE ? "bridge"
+ : mode == MACVLAN_MODE_PASSTHRU ? "passthru"
+ : mode == MACVLAN_MODE_SOURCE ? "source"
+ : "unknown");
+
+ if (!tb[IFLA_MACVLAN_FLAGS] ||
+ RTA_PAYLOAD(tb[IFLA_MACVLAN_FLAGS]) < sizeof(__u16))
+ flags = 0;
+ else
+ flags = rta_getattr_u16(tb[IFLA_MACVLAN_FLAGS]);
+
+ if (flags & MACVLAN_FLAG_NOPROMISC)
+ print_bool(PRINT_ANY, "nopromisc", "nopromisc ", true);
+
+ if (flags & MACVLAN_FLAG_NODST)
+ print_bool(PRINT_ANY, "nodst", "nodst ", true);
+
+ if (tb[IFLA_MACVLAN_BC_QUEUE_LEN] &&
+ RTA_PAYLOAD(tb[IFLA_MACVLAN_BC_QUEUE_LEN]) >= sizeof(__u32)) {
+ __u32 bc_queue_len = rta_getattr_u32(tb[IFLA_MACVLAN_BC_QUEUE_LEN]);
+ print_luint(PRINT_ANY, "bcqueuelen", "bcqueuelen %lu ", bc_queue_len);
+ }
+
+ if (tb[IFLA_MACVLAN_BC_QUEUE_LEN_USED] &&
+ RTA_PAYLOAD(tb[IFLA_MACVLAN_BC_QUEUE_LEN_USED]) >= sizeof(__u32)) {
+ __u32 bc_queue_len = rta_getattr_u32(tb[IFLA_MACVLAN_BC_QUEUE_LEN_USED]);
+ print_luint(PRINT_ANY, "usedbcqueuelen", "usedbcqueuelen %lu ", bc_queue_len);
+ }
+
+ if (tb[IFLA_MACVLAN_BC_CUTOFF] &&
+ RTA_PAYLOAD(tb[IFLA_MACVLAN_BC_CUTOFF]) >= sizeof(__s32)) {
+ __s32 bclim = rta_getattr_s32(tb[IFLA_MACVLAN_BC_CUTOFF]);
+ print_int(PRINT_ANY, "bclim", "bclim %d ", bclim);
+ }
+
+ /* in source mode, there are more options to print */
+
+ if (mode != MACVLAN_MODE_SOURCE)
+ return;
+
+ if (!tb[IFLA_MACVLAN_MACADDR_COUNT] ||
+ RTA_PAYLOAD(tb[IFLA_MACVLAN_MACADDR_COUNT]) < sizeof(__u32))
+ return;
+
+ count = rta_getattr_u32(tb[IFLA_MACVLAN_MACADDR_COUNT]);
+ print_int(PRINT_ANY, "macaddr_count", "remotes (%d) ", count);
+
+ if (!tb[IFLA_MACVLAN_MACADDR_DATA])
+ return;
+
+ rta = RTA_DATA(tb[IFLA_MACVLAN_MACADDR_DATA]);
+ len = RTA_PAYLOAD(tb[IFLA_MACVLAN_MACADDR_DATA]);
+
+ open_json_array(PRINT_JSON, "macaddr_data");
+ for (; RTA_OK(rta, len); rta = RTA_NEXT(rta, len)) {
+ if (rta->rta_type != IFLA_MACVLAN_MACADDR ||
+ RTA_PAYLOAD(rta) < 6)
+ continue;
+ addr = RTA_DATA(rta);
+ if (is_json_context()) {
+ SPRINT_BUF(b1);
+
+ snprintf(b1, sizeof(b1),
+ "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x", addr[0],
+ addr[1], addr[2], addr[3], addr[4], addr[5]);
+ print_string(PRINT_JSON, NULL, NULL, b1);
+ } else {
+ fprintf(f, "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x ", addr[0],
+ addr[1], addr[2], addr[3], addr[4], addr[5]);
+ }
+ }
+ close_json_array(PRINT_JSON, NULL);
+}
+
+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,
+};
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