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ip link: add VLAN support

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function                                             old     new   delta
do_add_or_delete                                       -    1073   +1073
get_u16                                                -      62     +62
static.protocols                                       -      16     +16
do_iplink                                           1235    1232      -3
do_change                                            495       -    -495
------------------------------------------------------------------------------
(add/remove: 3/1 grow/shrink: 0/1 up/down: 1151/-498)         Total: 653 bytes

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Patrick McHardy 2013-07-15 05:16:13 +02:00 committed by Denys Vlasenko
parent 9b58fe9c0b
commit a7ecbed56b
1 changed files with 128 additions and 9 deletions
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137
networking/libiproute/iplink.c
View File

@ -1,6 +1,7 @@
/* vi: set sw=4 ts=4: */
/*
* Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
* Patrick McHardy <kaber@trash.net>
*
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
@ -9,6 +10,20 @@
#include <netpacket/packet.h>
#include <netinet/if_ether.h>
#include <linux/if_vlan.h>
#undef ETH_P_8021AD
#define ETH_P_8021AD 0x88A8
#undef VLAN_FLAG_REORDER_HDR
#define VLAN_FLAG_REORDER_HDR 0x1
#undef VLAN_FLAG_GVRP
#define VLAN_FLAG_GVRP 0x2
#undef VLAN_FLAG_LOOSE_BINDING
#define VLAN_FLAG_LOOSE_BINDING 0x4
#undef VLAN_FLAG_MVRP
#define VLAN_FLAG_MVRP 0x8
#undef IFLA_VLAN_PROTOCOL
#define IFLA_VLAN_PROTOCOL 5
#include "ip_common.h" /* #include "libbb.h" is inside */
#include "rt_names.h"
#include "utils.h"
@ -277,12 +292,103 @@ static int ipaddr_list_link(char **argv)
return ipaddr_list_or_flush(argv, 0);
}
static void vlan_parse_opt(char **argv, struct nlmsghdr *n, unsigned int size)
{
static const char keywords[] ALIGN1 =
"id\0"
"protocol\0"
"reorder_hdr\0"
"gvrp\0"
"mvrp\0"
"loose_binding\0"
;
static const char protocols[] ALIGN1 =
"802.1q\0"
"802.1ad\0"
;
static const char str_on_off[] ALIGN1 =
"on\0"
"off\0"
;
enum {
ARG_id = 0,
ARG_reorder_hdr,
ARG_gvrp,
ARG_mvrp,
ARG_loose_binding,
ARG_protocol,
};
enum {
PROTO_8021Q = 0,
PROTO_8021AD,
};
enum {
PARM_on = 0,
PARM_off
};
int arg;
uint16_t id, proto;
struct ifla_vlan_flags flags = {};
while (*argv) {
arg = index_in_substrings(keywords, *argv);
if (arg < 0)
invarg(*argv, "type vlan");
NEXT_ARG();
if (arg == ARG_id) {
id = get_u16(*argv, "id");
addattr_l(n, size, IFLA_VLAN_ID, &id, sizeof(id));
} else if (arg == ARG_protocol) {
arg = index_in_substrings(protocols, *argv);
if (arg == PROTO_8021Q)
proto = ETH_P_8021Q;
else if (arg == PROTO_8021AD)
proto = ETH_P_8021AD;
else
bb_error_msg_and_die("unknown VLAN encapsulation protocol '%s'",
*argv);
addattr_l(n, size, IFLA_VLAN_PROTOCOL, &proto, sizeof(proto));
} else {
int param = index_in_strings(str_on_off, *argv);
if (param < 0)
die_must_be_on_off(nth_string(keywords, arg));
if (arg == ARG_reorder_hdr) {
flags.mask |= VLAN_FLAG_REORDER_HDR;
flags.flags &= ~VLAN_FLAG_REORDER_HDR;
if (param == PARM_on)
flags.flags |= VLAN_FLAG_REORDER_HDR;
} else if (arg == ARG_gvrp) {
flags.mask |= VLAN_FLAG_GVRP;
flags.flags &= ~VLAN_FLAG_GVRP;
if (param == PARM_on)
flags.flags |= VLAN_FLAG_GVRP;
} else if (arg == ARG_mvrp) {
flags.mask |= VLAN_FLAG_MVRP;
flags.flags &= ~VLAN_FLAG_MVRP;
if (param == PARM_on)
flags.flags |= VLAN_FLAG_MVRP;
} else { /*if (arg == ARG_loose_binding) */
flags.mask |= VLAN_FLAG_LOOSE_BINDING;
flags.flags &= ~VLAN_FLAG_LOOSE_BINDING;
if (param == PARM_on)
flags.flags |= VLAN_FLAG_LOOSE_BINDING;
}
}
argv++;
}
if (flags.mask)
addattr_l(n, size, IFLA_VLAN_FLAGS, &flags, sizeof(flags));
}
#ifndef NLMSG_TAIL
#define NLMSG_TAIL(nmsg) \
((struct rtattr *) (((void *) (nmsg)) + NLMSG_ALIGN((nmsg)->nlmsg_len)))
#endif
/* Return value becomes exitcode. It's okay to not return at all */
static int do_change(char **argv, const unsigned rtm)
static int do_add_or_delete(char **argv, const unsigned rtm)
{
static const char keywords[] ALIGN1 =
"link\0""name\0""type\0""dev\0";
@ -312,15 +418,17 @@ static int do_change(char **argv, const unsigned rtm)
while (*argv) {
arg = index_in_substrings(keywords, *argv);
if (arg == ARG_type) {
NEXT_ARG();
type_str = *argv++;
break;
}
if (arg == ARG_link) {
NEXT_ARG();
link_str = *argv;
} else if (arg == ARG_name) {
NEXT_ARG();
name_str = *argv;
} else if (arg == ARG_type) {
NEXT_ARG();
type_str = *argv;
} else {
if (arg == ARG_dev) {
if (dev_str)
@ -339,6 +447,17 @@ static int do_change(char **argv, const unsigned rtm)
addattr_l(&req.n, sizeof(req), IFLA_LINKINFO, NULL, 0);
addattr_l(&req.n, sizeof(req), IFLA_INFO_KIND, type_str,
strlen(type_str));
if (*argv) {
struct rtattr *data = NLMSG_TAIL(&req.n);
addattr_l(&req.n, sizeof(req), IFLA_INFO_DATA, NULL, 0);
if (strcmp(type_str, "vlan") == 0)
vlan_parse_opt(argv, &req.n, sizeof(req));
data->rta_len = (void *)NLMSG_TAIL(&req.n) - (void *)data;
}
linkinfo->rta_len = (void *)NLMSG_TAIL(&req.n) - (void *)linkinfo;
}
if (rtm != RTM_NEWLINK) {
@ -370,13 +489,13 @@ int FAST_FUNC do_iplink(char **argv)
static const char keywords[] ALIGN1 =
"add\0""delete\0""set\0""show\0""lst\0""list\0";
if (*argv) {
smalluint key = index_in_substrings(keywords, *argv);
if (key > 5) /* invalid argument */
bb_error_msg_and_die(bb_msg_invalid_arg, *argv, applet_name);
int key = index_in_substrings(keywords, *argv);
if (key < 0) /* invalid argument */
invarg(*argv, applet_name);
argv++;
if (key <= 1) /* add/delete */
return do_change(argv, key ? RTM_DELLINK : RTM_NEWLINK);
else if (key == 2) /* set */
return do_add_or_delete(argv, key ? RTM_DELLINK : RTM_NEWLINK);
if (key == 2) /* set */
return do_set(argv);
}
/* show, lst, list */