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link/inet6: add link IPv6 address generation mode support

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Signed-off-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: Thomas Haller <thaller@redhat.com>
This commit is contained in:
Dan Williams 2014-07-25 14:36:29 -05:00 • committed by Thomas Haller
parent b51815a9db
commit 558f966782
3 changed files with 140 additions and 7 deletions
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1
include/Makefile.am
View file

@ -48,6 +48,7 @@ nobase_libnlinclude_HEADERS = \
netlink/route/link/bridge.h \
netlink/route/link/can.h \
netlink/route/link/inet.h \
netlink/route/link/inet6.h \
netlink/route/link/info-api.h \
netlink/route/link/macvlan.h \
netlink/route/link/vlan.h \

37
include/netlink/route/link/inet6.h Normal file
View file

@ -0,0 +1,37 @@
/*
* netlink/route/link/inet6.h INET6 Link Module
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation version 2.1
* of the License.
*
* Copyright (c) 2014 Dan Williams <dcbw@redhat.com>
*/
#ifndef NETLINK_LINK_INET6_H_
#define NETLINK_LINK_INET6_H_
#include <netlink/netlink.h>
#ifdef __cplusplus
extern "C" {
#endif
const char * rtnl_link_inet6_addrgenmode2str (uint8_t mode,
char *buf,
size_t len);
uint8_t rtnl_link_inet6_str2addrgenmode (const char *mode);
extern int rtnl_link_inet6_get_addr_gen_mode(struct rtnl_link *,
uint8_t *);
extern int rtnl_link_inet6_set_addr_gen_mode(struct rtnl_link *,
uint8_t);
#ifdef __cplusplus
}
#endif
#endif

109
lib/route/link/inet6.c
View file

@ -15,16 +15,25 @@
#include <netlink/route/rtnl.h>
#include <netlink-private/route/link/api.h>
#define I6_ADDR_GEN_MODE_UNKNOWN UINT8_MAX
struct inet6_data
{
uint32_t i6_flags;
struct ifla_cacheinfo i6_cacheinfo;
uint32_t i6_conf[DEVCONF_MAX];
uint8_t i6_addr_gen_mode;
};
static void *inet6_alloc(struct rtnl_link *link)
{
return calloc(1, sizeof(struct inet6_data));
struct inet6_data *i6;
i6 = calloc(1, sizeof(struct inet6_data));
if (i6)
i6->i6_addr_gen_mode = I6_ADDR_GEN_MODE_UNKNOWN;
return i6;
}
static void *inet6_clone(struct rtnl_link *link, void *data)
@ -43,11 +52,12 @@ static void inet6_free(struct rtnl_link *link, void *data)
}
static struct nla_policy inet6_policy[IFLA_INET6_MAX+1] = {
[IFLA_INET6_FLAGS] = { .type = NLA_U32 },
[IFLA_INET6_CACHEINFO] = { .minlen = sizeof(struct ifla_cacheinfo) },
[IFLA_INET6_CONF] = { .minlen = 4 },
[IFLA_INET6_STATS] = { .minlen = 8 },
[IFLA_INET6_ICMP6STATS] = { .minlen = 8 },
[IFLA_INET6_FLAGS] = { .type = NLA_U32 },
[IFLA_INET6_CACHEINFO] = { .minlen = sizeof(struct ifla_cacheinfo) },
[IFLA_INET6_CONF] = { .minlen = 4 },
[IFLA_INET6_STATS] = { .minlen = 8 },
[IFLA_INET6_ICMP6STATS] = { .minlen = 8 },
[IFLA_INET6_ADDR_GEN_MODE] = { .type = NLA_U8 },
};
static const uint8_t map_stat_id_from_IPSTATS_MIB_v1[__IPSTATS_MIB_MAX] = {
@ -155,7 +165,10 @@ static int inet6_parse_protinfo(struct rtnl_link *link, struct nlattr *attr,
if (tb[IFLA_INET6_CONF])
nla_memcpy(&i6->i6_conf, tb[IFLA_INET6_CONF],
sizeof(i6->i6_conf));
if (tb[IFLA_INET6_ADDR_GEN_MODE])
i6->i6_addr_gen_mode = nla_get_u8 (tb[IFLA_INET6_ADDR_GEN_MODE]);
/*
* Due to 32bit data alignment, these addresses must be copied to an
* aligned location prior to access.
@ -200,6 +213,19 @@ static int inet6_parse_protinfo(struct rtnl_link *link, struct nlattr *attr,
return 0;
}
static int inet6_fill_af(struct rtnl_link *link, struct nl_msg *msg, void *data)
{
struct inet6_data *id = data;
if (id->i6_addr_gen_mode != I6_ADDR_GEN_MODE_UNKNOWN)
NLA_PUT_U8(msg, IFLA_INET6_ADDR_GEN_MODE, id->i6_addr_gen_mode);
return 0;
nla_put_failure:
return -NLE_MSGSIZE;
}
/* These live in include/net/if_inet6.h and should be moved to include/linux */
#define IF_RA_OTHERCONF 0x80
#define IF_RA_MANAGED 0x40
@ -259,6 +285,22 @@ static char *inet6_devconf2str(int type, char *buf, size_t len)
ARRAY_SIZE(inet6_devconf));
}
static const struct trans_tbl inet6_addr_gen_mode[] = {
__ADD(IN6_ADDR_GEN_MODE_EUI64, eui64),
__ADD(IN6_ADDR_GEN_MODE_NONE, none),
};
const char *rtnl_link_inet6_addrgenmode2str(uint8_t mode, char *buf, size_t len)
{
return __type2str(mode, buf, len, inet6_addr_gen_mode,
ARRAY_SIZE(inet6_addr_gen_mode));
}
uint8_t rtnl_link_inet6_str2addrgenmode(const char *mode)
{
return (uint8_t) __str2type(mode, inet6_addr_gen_mode,
ARRAY_SIZE(inet6_addr_gen_mode));
}
static void inet6_dump_details(struct rtnl_link *link,
struct nl_dump_params *p, void *data)
@ -281,6 +323,10 @@ static void inet6_dump_details(struct rtnl_link *link,
nl_dump(p, " retrans-time %s\n",
nl_msec2str(i6->i6_cacheinfo.retrans_time, buf, sizeof(buf)));
nl_dump(p, " link-local address mode %s\n",
rtnl_link_inet6_addrgenmode2str(i6->i6_addr_gen_mode,
buf, sizeof(buf)));
nl_dump_line(p, " devconf:\n");
nl_dump_line(p, " ");
@ -468,11 +514,60 @@ static struct rtnl_link_af_ops inet6_ops = {
.ao_free = &inet6_free,
.ao_parse_protinfo = &inet6_parse_protinfo,
.ao_parse_af = &inet6_parse_protinfo,
.ao_fill_af = &inet6_fill_af,
.ao_dump[NL_DUMP_DETAILS] = &inet6_dump_details,
.ao_dump[NL_DUMP_STATS] = &inet6_dump_stats,
.ao_protinfo_policy = &protinfo_policy,
};
/**
* Get IPv6 link-local address generation mode
* @arg link Link object
* @arg mode Generation mode on success
*
* Returns the link's IPv6 link-local address generation mode.
*
* @return 0 on success
* @return -NLE_NOATTR configuration setting not available
* @return -NLE_INVAL generation mode unknown. If the link was received via
* netlink, it means that address generation mode is not
* supported by the kernel.
*/
int rtnl_link_inet6_get_addr_gen_mode(struct rtnl_link *link, uint8_t *mode)
{
struct inet6_data *id;
if (!(id = rtnl_link_af_data(link, &inet6_ops)))
return -NLE_NOATTR;
if (id->i6_addr_gen_mode == I6_ADDR_GEN_MODE_UNKNOWN)
return -NLE_INVAL;
*mode = id->i6_addr_gen_mode;
return 0;
}
/**
* Set IPv6 link-local address generation mode
* @arg link Link object
* @arg mode Generation mode
*
* Sets the link's IPv6 link-local address generation mode.
*
* @return 0 on success
* @return -NLE_NOMEM could not allocate inet6 data
*/
int rtnl_link_inet6_set_addr_gen_mode(struct rtnl_link *link, uint8_t mode)
{
struct inet6_data *id;
if (!(id = rtnl_link_af_alloc(link, &inet6_ops)))
return -NLE_NOMEM;
id->i6_addr_gen_mode = mode;
return 0;
}
static void __init inet6_init(void)
{
rtnl_link_af_register(&inet6_ops);