Adjusting iproute2 utility to support new macvlan link type mode called
"source".
Example of commands that can be applied:
ip link add link eth0 name macvlan0 type macvlan mode source
ip link set link dev macvlan0 type macvlan macaddr add 00:11:11:11:11:11
ip link set link dev macvlan0 type macvlan macaddr del 00:11:11:11:11:11
ip link set link dev macvlan0 type macvlan macaddr flush
ip -details link show dev macvlan0
Based on previous work of Stefan Gula <ste...@gmail.com>
Signed-off-by: Michael Braun <michael-...@fami-braun.de>
Cc: ste...@gmail.com
v5:
- rebase and fix checkpatch
v4:
- add MACADDR_SET support
- skip FLAG_UNICAST / FLAG_UNICAST_ALL as this is not upstream
- fix man page
---
ip/iplink_macvlan.c | 124 +++++++++++++++++++++++++++++++++++++++++++++++---
man/man8/ip-link.8.in | 42 ++++++++++++++++-
2 files changed, 158 insertions(+), 8 deletions(-)
diff --git a/ip/iplink_macvlan.c b/ip/iplink_macvlan.c
index 83ff961..b9a146f 100644
--- a/ip/iplink_macvlan.c
+++ b/ip/iplink_macvlan.c
@@ -15,6 +15,7 @@
#include <string.h>
#include <sys/socket.h>
#include <linux/if_link.h>
+#include <linux/if_ether.h>
#include "rt_names.h"
#include "utils.h"
@@ -29,7 +30,11 @@
static void print_explain(struct link_util *lu, FILE *f)
{
fprintf(f,
- "Usage: ... %s mode { private | vepa | bridge | passthru
[nopromisc] }\n",
+ "Usage: ... %s mode MODE [flag MODE_FLAG] MODE_OPTS\n"
+ "MODE: private | vepa | bridge | passthru | source\n"
+ "MODE_FLAG: null | nopromisc\n"
+ "MODE_OPTS: for mode \"source\":\n"
+ "\tmacaddr { { add | del } <macaddr> | set [ <macaddr> [
<macaddr> ... ] ] | flush }\n",
lu->id
);
}
@@ -43,7 +48,15 @@ static void explain(struct link_util *lu)
static int mode_arg(const char *arg)
{
fprintf(stderr,
- "Error: argument of \"mode\" must be \"private\", \"vepa\",
\"bridge\" or \"passthru\", not \"%s\"\n",
+ "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\" or \"null\",
not \"%s\"\n",
arg);
return -1;
}
@@ -53,6 +66,10 @@ static int macvlan_parse_opt(struct link_util *lu, int argc,
char **argv,
{
__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) {
@@ -66,10 +83,72 @@ static int macvlan_parse_opt(struct link_util *lu, int
argc, char **argv,
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, "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, "help") == 0) {
explain(lu);
return -1;
@@ -84,7 +163,7 @@ static int macvlan_parse_opt(struct link_util *lu, int argc,
char **argv,
if (mode)
addattr32(n, 1024, IFLA_MACVLAN_MODE, mode);
- if (flags) {
+ if (has_flags) {
if (flags & MACVLAN_FLAG_NOPROMISC &&
mode != MACVLAN_MODE_PASSTHRU) {
pfx_err(lu, "nopromisc flag only valid in passthru
mode");
@@ -100,6 +179,10 @@ 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;
@@ -109,20 +192,49 @@ static void macvlan_print_opt(struct link_util *lu, FILE
*f, struct rtattr *tb[]
return;
mode = rta_getattr_u32(tb[IFLA_MACVLAN_MODE]);
- fprintf(f, " mode %s ",
+ fprintf(f, "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))
- return;
+ flags = 0;
+ else
+ flags = rta_getattr_u16(tb[IFLA_MACVLAN_FLAGS]);
- flags = rta_getattr_u16(tb[IFLA_MACVLAN_FLAGS]);
if (flags & MACVLAN_FLAG_NOPROMISC)
fprintf(f, "nopromisc ");
+
+ /* 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]);
+ fprintf(f, "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]);
+
+ 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);
+ fprintf(f, "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x ", addr[0],
+ addr[1], addr[2], addr[3], addr[4], addr[5]);
+ }
}
static void macvlan_print_help(struct link_util *lu, int argc, char **argv,
diff --git a/man/man8/ip-link.8.in b/man/man8/ip-link.8.in
index ee1159d..18e9417 100644
--- a/man/man8/ip-link.8.in
+++ b/man/man8/ip-link.8.in
@@ -135,7 +135,12 @@ ip-link \- network device configuration
.IR NAME " ]"
.br
.RB "[ " addrgenmode " { " eui64 " | " none " | " stable_secret " | " random "
} ]"
-
+.br
+.RB "[ " macaddr " { " flush " | { " add " | " del " } "
+.IR MACADDR " | set [ "
+.IR MACADDR " [ "
+.IR MACADDR " [ ... ] ] ] } ]"
+.br
.ti -8
.B ip link show
@@ -882,7 +887,7 @@ the following additional arguments are supported:
.BI "ip link add link " DEVICE " name " NAME
.BR type " { " macvlan " | " macvtap " } "
.BR mode " { " private " | " vepa " | " bridge " | " passthru
-.RB " [ " nopromisc " ] } "
+.RB " [ " nopromisc " ] | " source " } "
.in +8
.sp
@@ -919,6 +924,13 @@ the interface or create vlan interfaces on top of it. By
default, this mode
forces the underlying interface into promiscuous mode. Passing the
.BR nopromisc " flag prevents this, so the promisc flag may be controlled "
using standard tools.
+
+.B mode source
+- allows one to set a list of allowed mac address, which is used to match
+against source mac address from received frames on underlying interface. This
+allows creating mac based VLAN associations, instead of standard port or tag
+based. The feature is useful to deploy 802.1x mac based behavior,
+where drivers of underlying interfaces doesn't allows that.
.in -8
.TP
@@ -1468,6 +1480,32 @@ the following additional arguments are supported:
.in -8
+.TP
+MACVLAN and MACVTAP Support
+Modify list of allowed macaddr for link in source mode.
+
+.B "ip link set type { macvlan | macvap } "
+[
+.BI macaddr " " "" COMMAND " " MACADDR " ..."
+]
+
+Commands:
+.in +8
+.B add
+- add MACADDR to allowed list
+.sp
+.B set
+- replace allowed list
+.sp
+.B del
+- remove MACADDR from allowed list
+.sp
+.B flush
+- flush whole allowed list
+.sp
+.in -8
+
+
.SS ip link show - display device attributes
.TP
--
2.1.4
