/*
* Driver interaction with Linux MACsec kernel module
* Copyright (c) 2016, Sabrina Dubroca <sd@queasysnail.net> and Red Hat, Inc.
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
*/
#include "includes.h"
#include <sys/ioctl.h>
#include <net/if.h>
#include <netpacket/packet.h>
#include <net/if_arp.h>
#include <net/if.h>
#include <netlink/netlink.h>
#include <netlink/genl/genl.h>
#include <netlink/genl/ctrl.h>
#include <netlink/route/link.h>
#include <netlink/route/link/macsec.h>
#include <linux/if_macsec.h>
#include <inttypes.h>
#include "utils/common.h"
#include "utils/eloop.h"
#include "pae/ieee802_1x_kay.h"
#include "driver.h"
#include "driver_wired_common.h"
#define DRV_PREFIX "macsec_linux: "
#define UNUSED_SCI 0xffffffffffffffff
struct cb_arg {
struct macsec_drv_data *drv;
u32 *pn;
int ifindex;
u8 txsa;
u8 rxsa;
u64 rxsci;
};
struct macsec_genl_ctx {
struct nl_sock *sk;
int macsec_genl_id;
struct cb_arg cb_arg;
};
struct macsec_drv_data {
struct driver_wired_common_data common;
struct rtnl_link *link;
struct nl_cache *link_cache;
struct nl_sock *sk;
struct macsec_genl_ctx ctx;
struct netlink_data *netlink;
struct nl_handle *nl;
char ifname[IFNAMSIZ + 1];
int ifi;
int parent_ifi;
Boolean created_link;
Boolean controlled_port_enabled;
Boolean controlled_port_enabled_set;
Boolean protect_frames;
Boolean protect_frames_set;
Boolean encrypt;
Boolean encrypt_set;
Boolean replay_protect;
Boolean replay_protect_set;
u32 replay_window;
u8 encoding_sa;
Boolean encoding_sa_set;
};
static int dump_callback(struct nl_msg *msg, void *argp);
static struct nl_msg * msg_prepare(enum macsec_nl_commands cmd,
const struct macsec_genl_ctx *ctx,
unsigned int ifindex)
{
struct nl_msg *msg;
msg = nlmsg_alloc();
if (!msg) {
wpa_printf(MSG_ERROR, DRV_PREFIX "failed to alloc message");
return NULL;
}
if (!genlmsg_put(msg, 0, 0, ctx->macsec_genl_id, 0, 0, cmd, 0)) {
wpa_printf(MSG_ERROR, DRV_PREFIX "failed to put header");
goto nla_put_failure;
}
NLA_PUT_U32(msg, MACSEC_ATTR_IFINDEX, ifindex);
return msg;
nla_put_failure:
nlmsg_free(msg);
return NULL;
}
static int nla_put_rxsc_config(struct nl_msg *msg, u64 sci)
{
struct nlattr *nest = nla_nest_start(msg, MACSEC_ATTR_RXSC_CONFIG);
if (!nest)
return -1;
NLA_PUT_U64(msg, MACSEC_RXSC_ATTR_SCI, sci);
nla_nest_end(msg, nest);
return 0;
nla_put_failure:
return -1;
}
static int init_genl_ctx(struct macsec_drv_data *drv)
{
struct macsec_genl_ctx *ctx = &drv->ctx;
ctx->sk = nl_socket_alloc();
if (!ctx->sk) {
wpa_printf(MSG_ERROR, DRV_PREFIX "failed to alloc genl socket");
return -1;
}
if (genl_connect(ctx->sk) < 0) {
wpa_printf(MSG_ERROR,
DRV_PREFIX "connection to genl socket failed");
goto out_free;
}
ctx->macsec_genl_id = genl_ctrl_resolve(ctx->sk, "macsec");
if (ctx->macsec_genl_id < 0) {
wpa_printf(MSG_ERROR, DRV_PREFIX "genl resolve failed");
goto out_free;
}
memset(&ctx->cb_arg, 0, sizeof(ctx->cb_arg));
ctx->cb_arg.drv = drv;
nl_socket_modify_cb(ctx->sk, NL_CB_VALID, NL_CB_CUSTOM, dump_callback,
&ctx->cb_arg);
return 0;
out_free:
nl_socket_free(ctx->sk);
ctx->sk = NULL;
return -1;
}
static int try_commit(struct macsec_drv_data *drv)
{
int err;
if (!drv->sk)
return 0;
if (!drv->link)
return 0;
if (drv->controlled_port_enabled_set) {
struct rtnl_link *change = rtnl_link_alloc();
wpa_printf(MSG_DEBUG, DRV_PREFIX
"%s: try_commit controlled_port_enabled=%d",
drv->ifname, drv->controlled_port_enabled);
if (!change)
return -1;
rtnl_link_set_name(change, drv->ifname);
if (drv->controlled_port_enabled)
rtnl_link_set_flags(change, IFF_UP);
else
rtnl_link_unset_flags(change, IFF_UP);
err = rtnl_link_change(drv->sk, change, change, 0);
if (err < 0)
return err;
rtnl_link_put(change);
drv->controlled_port_enabled_set = FALSE;
}
if (drv->protect_frames_set) {
wpa_printf(MSG_DEBUG, DRV_PREFIX
"%s: try_commit protect_frames=%d",
drv->ifname, drv->protect_frames);
rtnl_link_macsec_set_protect(drv->link, drv->protect_frames);
}
if (drv->encrypt_set) {
wpa_printf(MSG_DEBUG, DRV_PREFIX "%s: try_commit encrypt=%d",
drv->ifname, drv->encrypt);
rtnl_link_macsec_set_encrypt(drv->link, drv->encrypt);
}
if (drv->replay_protect_set) {
wpa_printf(MSG_DEBUG, DRV_PREFIX
"%s: try_commit replay_protect=%d replay_window=%d",
drv->ifname, drv->replay_protect,
drv->replay_window);
rtnl_link_macsec_set_replay_protect(drv->link,
drv->replay_protect);
if (drv->replay_protect)
rtnl_link_macsec_set_window(drv->link,
drv->replay_window);
}
if (drv->encoding_sa_set) {
wpa_printf(MSG_DEBUG, DRV_PREFIX
"%s: try_commit encoding_sa=%d",
drv->ifname, drv->encoding_sa);
rtnl_link_macsec_set_encoding_sa(drv->link, drv->encoding_sa);
}
err = rtnl_link_add(drv->sk, drv->link, 0);
if (err < 0)
return err;
drv->protect_frames_set = FALSE;
drv->encrypt_set = FALSE;
drv->replay_protect_set = FALSE;
return 0;
}
static void macsec_drv_wpa_deinit(void *priv)
{
struct macsec_drv_data *drv = priv;
driver_wired_deinit_common(&drv->common);
os_free(drv);
}
static int macsec_check_macsec(void)
{
struct nl_sock *sk;
int err = -1;
sk = nl_socket_alloc();
if (!sk) {
wpa_printf(MSG_ERROR, DRV_PREFIX "failed to alloc genl socket");
return -1;
}
if (genl_connect(sk) < 0) {
wpa_printf(MSG_ERROR,
DRV_PREFIX "connection to genl socket failed");
goto out_free;
}
if (genl_ctrl_resolve(sk, "macsec") < 0) {
wpa_printf(MSG_ERROR,
DRV_PREFIX "genl resolve failed - macsec kernel module not present?");
goto out_free;
}
err = 0;
out_free:
nl_socket_free(sk);
return err;
}
static void * macsec_drv_wpa_init(void *ctx, const char *ifname)
{
struct macsec_drv_data *drv;
if (macsec_check_macsec() < 0)
return NULL;
drv = os_zalloc(sizeof(*drv));
if (!drv)
return NULL;
if (driver_wired_init_common(&drv->common, ifname, ctx) < 0) {
os_free(drv);
return NULL;
}
return drv;
}
static int macsec_drv_macsec_init(void *priv, struct macsec_init_params *params)
{
struct macsec_drv_data *drv = priv;
int err;
wpa_printf(MSG_DEBUG, "%s", __func__);
drv->sk = nl_socket_alloc();
if (!drv->sk)
return -1;
err = nl_connect(drv->sk, NETLINK_ROUTE);
if (err < 0) {
wpa_printf(MSG_ERROR, DRV_PREFIX
"Unable to connect NETLINK_ROUTE socket: %s",
strerror(errno));
goto sock;
}
err = rtnl_link_alloc_cache(drv->sk, AF_UNSPEC, &drv->link_cache);
if (err < 0) {
wpa_printf(MSG_ERROR, DRV_PREFIX "Unable to get link cache: %s",
strerror(errno));
goto sock;
}
drv->parent_ifi = rtnl_link_name2i(drv->link_cache, drv->common.ifname);
if (drv->parent_ifi == 0) {
wpa_printf(MSG_ERROR, DRV_PREFIX
"couldn't find ifindex for interface %s",
drv->common.ifname);
goto cache;
}
wpa_printf(MSG_DEBUG, DRV_PREFIX "ifname=%s parent_ifi=%d",
drv->common.ifname, drv->parent_ifi);
err = init_genl_ctx(drv);
if (err < 0)
goto cache;
return 0;
cache:
nl_cache_free(drv->link_cache);
drv->link_cache = NULL;
sock:
nl_socket_free(drv->sk);
drv->sk = NULL;
return -1;
}
static int macsec_drv_macsec_deinit(void *priv)
{
struct macsec_drv_data *drv = priv;
wpa_printf(MSG_DEBUG, "%s", __func__);
if (drv->sk)
nl_socket_free(drv->sk);
drv->sk = NULL;
if (drv->link_cache)
nl_cache_free(drv->link_cache);
drv->link_cache = NULL;
if (drv->ctx.sk)
nl_socket_free(drv->ctx.sk);
return 0;
}
static int macsec_drv_get_capability(void *priv, enum macsec_cap *cap)
{
wpa_printf(MSG_DEBUG, "%s", __func__);
*cap = MACSEC_CAP_INTEG_AND_CONF;
return 0;
}
/**
* macsec_drv_enable_protect_frames - Set protect frames status
* @priv: Private driver interface data
* @enabled: TRUE = protect frames enabled
* FALSE = protect frames disabled
* Returns: 0 on success, -1 on failure (or if not supported)
*/
static int macsec_drv_enable_protect_frames(void *priv, Boolean enabled)
{
struct macsec_drv_data *drv = priv;
wpa_printf(MSG_DEBUG, "%s -> %s", __func__, enabled ? "TRUE" : "FALSE");
drv->protect_frames_set = TRUE;
drv->protect_frames = enabled;
return try_commit(drv);
}
/**
* macsec_drv_enable_encrypt - Set protect frames status
* @priv: Private driver interface data
* @enabled: TRUE = protect frames enabled
* FALSE = protect frames disabled
* Returns: 0 on success, -1 on failure (or if not supported)
*/
static int macsec_drv_enable_encrypt(void *priv, Boolean enabled)
{
struct macsec_drv_data *drv = priv;
wpa_printf(MSG_DEBUG, "%s -> %s", __func__, enabled ? "TRUE" : "FALSE");
drv->encrypt_set = TRUE;
drv->encrypt = enabled;
return try_commit(drv);
}
/**
* macsec_drv_set_replay_protect - Set replay protect status and window size
* @priv: Private driver interface data
* @enabled: TRUE = replay protect enabled
* FALSE = replay protect disabled
* @window: replay window size, valid only when replay protect enabled
* Returns: 0 on success, -1 on failure (or if not supported)
*/
static int macsec_drv_set_replay_protect(void *priv, Boolean enabled,
u32 window)
{
struct macsec_drv_data *drv = priv;
wpa_printf(MSG_DEBUG, "%s -> %s, %u", __func__,
enabled ? "TRUE" : "FALSE", window);
drv->replay_protect_set = TRUE;
drv->replay_protect = enabled;
if (enabled)
drv->replay_window = window;
return try_commit(drv);
}
/**
* macsec_drv_set_current_cipher_suite - Set current cipher suite
* @priv: Private driver interface data
* @cs: EUI64 identifier
* Returns: 0 on success, -1 on failure (or if not supported)
*/
static int macsec_drv_set_current_cipher_suite(void *priv, u64 cs)
{
wpa_printf(MSG_DEBUG, "%s -> %016" PRIx64, __func__, cs);
return 0;
}
/**
* macsec_drv_enable_controlled_port - Set controlled port status
* @priv: Private driver interface data
* @enabled: TRUE = controlled port enabled
* FALSE = controlled port disabled
* Returns: 0 on success, -1 on failure (or if not supported)
*/
static int macsec_drv_enable_controlled_port(void *priv, Boolean enabled)
{
struct macsec_drv_data *drv = priv;
wpa_printf(MSG_DEBUG, "%s -> %s", __func__, enabled ? "TRUE" : "FALSE");
drv->controlled_port_enabled = enabled;
drv->controlled_port_enabled_set = TRUE;
return try_commit(drv);
}
static struct nla_policy sa_policy[MACSEC_SA_ATTR_MAX + 1] = {
[MACSEC_SA_ATTR_AN] = { .type = NLA_U8 },
[MACSEC_SA_ATTR_ACTIVE] = { .type = NLA_U8 },
[MACSEC_SA_ATTR_PN] = { .type = NLA_U32 },
[MACSEC_SA_ATTR_KEYID] = { .type = NLA_BINARY },
};
static struct nla_policy sc_policy[MACSEC_RXSC_ATTR_MAX + 1] = {
[MACSEC_RXSC_ATTR_SCI] = { .type = NLA_U64 },
[MACSEC_RXSC_ATTR_ACTIVE] = { .type = NLA_U8 },
[MACSEC_RXSC_ATTR_SA_LIST] = { .type = NLA_NESTED },
};
static struct nla_policy main_policy[MACSEC_ATTR_MAX + 1] = {
[MACSEC_ATTR_IFINDEX] = { .type = NLA_U32 },
[MACSEC_ATTR_SECY] = { .type = NLA_NESTED },
[MACSEC_ATTR_TXSA_LIST] = { .type = NLA_NESTED },
[MACSEC_ATTR_RXSC_LIST] = { .type = NLA_NESTED },
};
static int dump_callback(struct nl_msg *msg, void *argp)
{
struct nlmsghdr *ret_hdr = nlmsg_hdr(msg);
struct nlattr *tb_msg[MACSEC_ATTR_MAX + 1];
struct cb_arg *arg = (struct cb_arg *) argp;
struct genlmsghdr *gnlh = (struct genlmsghdr *) nlmsg_data(ret_hdr);
int err;
if (ret_hdr->nlmsg_type != arg->drv->ctx.macsec_genl_id)
return 0;
err = nla_parse(tb_msg, MACSEC_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
genlmsg_attrlen(gnlh, 0), main_policy);
if (err < 0)
return 0;
if (!tb_msg[MACSEC_ATTR_IFINDEX])
return 0;
if (nla_get_u32(tb_msg[MACSEC_ATTR_IFINDEX]) != (u32) arg->ifindex)
return 0;
if (arg->txsa < 4 && !tb_msg[MACSEC_ATTR_TXSA_LIST]) {
return 0;
} else if (arg->txsa < 4) {
struct nlattr *nla;
int rem;
nla_for_each_nested(nla, tb_msg[MACSEC_ATTR_TXSA_LIST], rem) {
struct nlattr *tb[MACSEC_SA_ATTR_MAX + 1];
err = nla_parse_nested(tb, MACSEC_SA_ATTR_MAX, nla,
sa_policy);
if (err < 0)
continue;
if (!tb[MACSEC_SA_ATTR_AN])
continue;
if (nla_get_u8(tb[MACSEC_SA_ATTR_AN]) != arg->txsa)
continue;
if (!tb[MACSEC_SA_ATTR_PN])
return 0;
*arg->pn = nla_get_u32(tb[MACSEC_SA_ATTR_PN]);
return 0;
}
return 0;
}
if (arg->rxsci == UNUSED_SCI)
return 0;
if (tb_msg[MACSEC_ATTR_RXSC_LIST]) {
struct nlattr *nla;
int rem;
nla_for_each_nested(nla, tb_msg[MACSEC_ATTR_RXSC_LIST], rem) {
struct nlattr *tb[MACSEC_RXSC_ATTR_MAX + 1];
err = nla_parse_nested(tb, MACSEC_RXSC_ATTR_MAX, nla,
sc_policy);
if (err < 0)
return 0;
if (!tb[MACSEC_RXSC_ATTR_SCI])
continue;
if (nla_get_u64(tb[MACSEC_RXSC_ATTR_SCI]) != arg->rxsci)
continue;
if (!tb[MACSEC_RXSC_ATTR_SA_LIST])
return 0;
nla_for_each_nested(nla, tb[MACSEC_RXSC_ATTR_SA_LIST],
rem) {
struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1];
err = nla_parse_nested(tb_sa,
MACSEC_SA_ATTR_MAX, nla,
sa_policy);
if (err < 0)
continue;
if (!tb_sa[MACSEC_SA_ATTR_AN])
continue;
if (nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]) !=
arg->rxsa)
continue;
if (!tb_sa[MACSEC_SA_ATTR_PN])
return 0;
*arg->pn =
nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]);
return 0;
}
return 0;
}
return 0;
}
return 0;
}
static int nl_send_recv(struct nl_sock *sk, struct nl_msg *msg)
{
int ret;
ret = nl_send_auto_complete(sk, msg);
if (ret < 0) {
wpa_printf(MSG_ERROR, DRV_PREFIX "%s: failed to send: %d (%s)",
__func__, ret, nl_geterror(-ret));
return ret;
}
ret = nl_recvmsgs_default(sk);
if (ret < 0) {
wpa_printf(MSG_ERROR, DRV_PREFIX "%s: failed to recv: %d (%s)",
__func__, ret, nl_geterror(-ret));
}
return ret;
}
static int do_dump(struct macsec_drv_data *drv, u8 txsa, u64 rxsci, u8 rxsa,
u32 *pn)
{
struct macsec_genl_ctx *ctx = &drv->ctx;
struct nl_msg *msg;
int ret = 1;
ctx->cb_arg.ifindex = drv->ifi;
ctx->cb_arg.rxsci = rxsci;
ctx->cb_arg.rxsa = rxsa;
ctx->cb_arg.txsa = txsa;
ctx->cb_arg.pn = pn;
msg = nlmsg_alloc();
if (!msg) {
wpa_printf(MSG_ERROR, DRV_PREFIX "%s: failed to alloc message",
__func__);
return 1;
}
if (!genlmsg_put(msg, NL_AUTO_PORT, NL_AUTO_SEQ, ctx->macsec_genl_id, 0,
NLM_F_DUMP, MACSEC_CMD_GET_TXSC, 0)) {
wpa_printf(MSG_ERROR, DRV_PREFIX "%s: failed to put header",
__func__);
goto out_free_msg;
}
ret = nl_send_recv(ctx->sk, msg);
if (ret < 0)
wpa_printf(MSG_ERROR,
DRV_PREFIX "failed to communicate: %d (%s)",
ret, nl_geterror(-ret));
ctx->cb_arg.pn = NULL;
out_free_msg:
nlmsg_free(msg);
return ret;
}
/**
* macsec_drv_get_receive_lowest_pn - Get receive lowest PN
* @priv: Private driver interface data
* @sa: secure association
* Returns: 0 on success, -1 on failure (or if not supported)
*/
static int macsec_drv_get_receive_lowest_pn(void *priv, struct receive_sa *sa)
{
struct macsec_drv_data *drv = priv;
int err;
wpa_printf(MSG_DEBUG, DRV_PREFIX "%s", __func__);
err = do_dump(drv, 0xff, mka_sci_u64(&sa->sc->sci), sa->an,
&sa->lowest_pn);
wpa_printf(MSG_DEBUG, DRV_PREFIX "%s: result %d", __func__,
sa->lowest_pn);
return err;
}
/**
* macsec_drv_set_receive_lowest_pn - Set receive lowest PN
* @priv: Private driver interface data
* @sa: secure association
* Returns: 0 on success, -1 on failure (or if not supported)
*/
static int macsec_drv_set_receive_lowest_pn(void *priv, struct receive_sa *sa)
{
struct macsec_drv_data *drv = priv;
struct macsec_genl_ctx *ctx = &drv->ctx;
struct nl_msg *msg;
struct nlattr *nest;
int ret = -1;
wpa_printf(MSG_DEBUG,
DRV_PREFIX "%s: set_receive_lowest_pn -> %d: %d",
drv->ifname, sa->an, sa->next_pn);
msg = msg_prepare(MACSEC_CMD_UPD_RXSA, ctx, drv->ifi);
if (!msg)
return ret;
nest = nla_nest_start(msg, MACSEC_ATTR_SA_CONFIG);
if (!nest)
goto nla_put_failure;
NLA_PUT_U8(msg, MACSEC_SA_ATTR_AN, sa->an);
NLA_PUT_U32(msg, MACSEC_SA_ATTR_PN, sa->next_pn);
nla_nest_end(msg, nest);
ret = nl_send_recv(ctx->sk, msg);
if (ret < 0) {
wpa_printf(MSG_ERROR,
DRV_PREFIX "failed to communicate: %d (%s)",
ret, nl_geterror(-ret));
}
nla_put_failure:
nlmsg_free(msg);
return ret;
}
/**
* macsec_drv_get_transmit_next_pn - Get transmit next PN
* @priv: Private driver interface data
* @sa: secure association
* Returns: 0 on success, -1 on failure (or if not supported)
*/
static int macsec_drv_get_transmit_next_pn(void *priv, struct transmit_sa *sa)
{
struct macsec_drv_data *drv = priv;
int err;
wpa_printf(MSG_DEBUG, "%s", __func__);
err = do_dump(drv, sa->an, UNUSED_SCI, 0xff, &sa->next_pn);
wpa_printf(MSG_DEBUG, DRV_PREFIX "%s: err %d result %d", __func__, err,
sa->next_pn);
return err;
}
/**
* macsec_drv_set_transmit_next_pn - Set transmit next pn
* @priv: Private driver interface data
* @sa: secure association
* Returns: 0 on success, -1 on failure (or if not supported)
*/
static int macsec_drv_set_transmit_next_pn(void *priv, struct transmit_sa *sa)
{
struct macsec_drv_data *drv = priv;
struct macsec_genl_ctx *ctx = &drv->ctx;
struct nl_msg *msg;
struct nlattr *nest;
int ret = -1;
wpa_printf(MSG_DEBUG, "%s -> %d: %d", __func__, sa->an, sa->next_pn);
msg = msg_prepare(MACSEC_CMD_UPD_TXSA, ctx, drv->ifi);
if (!msg)
return ret;
nest = nla_nest_start(msg, MACSEC_ATTR_SA_CONFIG);
if (!nest)
goto nla_put_failure;
NLA_PUT_U8(msg, MACSEC_SA_ATTR_AN, sa->an);
NLA_PUT_U32(msg, MACSEC_SA_ATTR_PN, sa->next_pn);
nla_nest_end(msg, nest);
ret = nl_send_recv(ctx->sk, msg);
if (ret < 0) {
wpa_printf(MSG_ERROR,
DRV_PREFIX "failed to communicate: %d (%s)",
ret, nl_geterror(-ret));
}
nla_put_failure:
nlmsg_free(msg);
return ret;
}
#define SCISTR MACSTR "::%hx"
#define SCI2STR(addr, port) MAC2STR(addr), htons(port)
/**
* macsec_drv_create_receive_sc - Create secure channel for receiving
* @priv: Private driver interface data
* @sc: secure channel
* @sci_addr: secure channel identifier - address
* @sci_port: secure channel identifier - port
* @conf_offset: confidentiality offset (0, 30, or 50)
* @validation: frame validation policy (0 = Disabled, 1 = Checked,
* 2 = Strict)
* Returns: 0 on success, -1 on failure (or if not supported)
*/
static int macsec_drv_create_receive_sc(void *priv, struct receive_sc *sc,
unsigned int conf_offset,
int validation)
{
struct macsec_drv_data *drv = priv;
struct macsec_genl_ctx *ctx = &drv->ctx;
struct nl_msg *msg;
int ret = -1;
wpa_printf(MSG_DEBUG, DRV_PREFIX "%s: create_receive_sc -> " SCISTR
" (conf_offset=%u validation=%d)",
drv->ifname, SCI2STR(sc->sci.addr, sc->sci.port),
conf_offset, validation);
msg = msg_prepare(MACSEC_CMD_ADD_RXSC, ctx, drv->ifi);
if (!msg)
return ret;
if (nla_put_rxsc_config(msg, mka_sci_u64(&sc->sci)))
goto nla_put_failure;
ret = nl_send_recv(ctx->sk, msg);
if (ret < 0) {
wpa_printf(MSG_ERROR,
DRV_PREFIX "%s: failed to communicate: %d (%s)",
__func__, ret, nl_geterror(-ret));
}
nla_put_failure:
nlmsg_free(msg);
return ret;
}
/**
* macsec_drv_delete_receive_sc - Delete secure connection for receiving
* @priv: private driver interface data from init()
* @sc: secure channel
* Returns: 0 on success, -1 on failure
*/
static int macsec_drv_delete_receive_sc(void *priv, struct receive_sc *sc)
{
struct macsec_drv_data *drv = priv;
struct macsec_genl_ctx *ctx = &drv->ctx;
struct nl_msg *msg;
int ret = -1;
wpa_printf(MSG_DEBUG, DRV_PREFIX "%s: delete_receive_sc -> " SCISTR,
drv->ifname, SCI2STR(sc->sci.addr, sc->sci.port));
msg = msg_prepare(MACSEC_CMD_DEL_RXSC, ctx, drv->ifi);
if (!msg)
return ret;
if (nla_put_rxsc_config(msg, mka_sci_u64(&sc->sci)))
goto nla_put_failure;
ret = nl_send_recv(ctx->sk, msg);
if (ret < 0) {
wpa_printf(MSG_ERROR,
DRV_PREFIX "%s: failed to communicate: %d (%s)",
__func__, ret, nl_geterror(-ret));
}
nla_put_failure:
nlmsg_free(msg);
return ret;
}
/**
* macsec_drv_create_receive_sa - Create secure association for receive
* @priv: private driver interface data from init()
* @sa: secure association
* Returns: 0 on success, -1 on failure
*/
static int macsec_drv_create_receive_sa(void *priv, struct receive_sa *sa)
{
struct macsec_drv_data *drv = priv;
struct macsec_genl_ctx *ctx = &drv->ctx;
struct nl_msg *msg;
struct nlattr *nest;
int ret = -1;
wpa_printf(MSG_DEBUG,
DRV_PREFIX "%s: create_receive_sa -> %d on " SCISTR
" (enable_receive=%d next_pn=%u)",
drv->ifname, sa->an,
SCI2STR(sa->sc->sci.addr, sa->sc->sci.port),
sa->enable_receive, sa->next_pn);
wpa_hexdump(MSG_DEBUG, DRV_PREFIX "SA keyid",
&sa->pkey->key_identifier,
sizeof(sa->pkey->key_identifier));
wpa_hexdump_key(MSG_DEBUG, DRV_PREFIX "SA key",
sa->pkey->key, sa->pkey->key_len);
msg = msg_prepare(MACSEC_CMD_ADD_RXSA, ctx, drv->ifi);
if (!msg)
return ret;
if (nla_put_rxsc_config(msg, mka_sci_u64(&sa->sc->sci)))
goto nla_put_failure;
nest = nla_nest_start(msg, MACSEC_ATTR_SA_CONFIG);
if (!nest)
goto nla_put_failure;
NLA_PUT_U8(msg, MACSEC_SA_ATTR_AN, sa->an);
NLA_PUT_U8(msg, MACSEC_SA_ATTR_ACTIVE, sa->enable_receive);
NLA_PUT_U32(msg, MACSEC_SA_ATTR_PN, sa->next_pn);
NLA_PUT(msg, MACSEC_SA_ATTR_KEYID, sizeof(sa->pkey->key_identifier),
&sa->pkey->key_identifier);
NLA_PUT(msg, MACSEC_SA_ATTR_KEY, sa->pkey->key_len, sa->pkey->key);
nla_nest_end(msg, nest);
ret = nl_send_recv(ctx->sk, msg);
if (ret < 0) {
wpa_printf(MSG_ERROR,
DRV_PREFIX "%s: failed to communicate: %d (%s)",
__func__, ret, nl_geterror(-ret));
}
nla_put_failure:
nlmsg_free(msg);
return ret;
}
/**
* macsec_drv_delete_receive_sa - Delete secure association for receive
* @priv: private driver interface data from init()
* @sa: secure association
* Returns: 0 on success, -1 on failure
*/
static int macsec_drv_delete_receive_sa(void *priv, struct receive_sa *sa)
{
struct macsec_drv_data *drv = priv;
struct macsec_genl_ctx *ctx = &drv->ctx;
struct nl_msg *msg;
struct nlattr *nest;
int ret = -1;
wpa_printf(MSG_DEBUG, DRV_PREFIX "%s: delete_receive_sa -> %d on "
SCISTR, drv->ifname, sa->an,
SCI2STR(sa->sc->sci.addr, sa->sc->sci.port));
msg = msg_prepare(MACSEC_CMD_DEL_RXSA, ctx, drv->ifi);
if (!msg)
return ret;
if (nla_put_rxsc_config(msg, mka_sci_u64(&sa->sc->sci)))
goto nla_put_failure;
nest = nla_nest_start(msg, MACSEC_ATTR_SA_CONFIG);
if (!nest)
goto nla_put_failure;
NLA_PUT_U8(msg, MACSEC_SA_ATTR_AN, sa->an);
nla_nest_end(msg, nest);
ret = nl_send_recv(ctx->sk, msg);
if (ret < 0) {
wpa_printf(MSG_ERROR,
DRV_PREFIX "%s: failed to communicate: %d (%s)",
__func__, ret, nl_geterror(-ret));
}
nla_put_failure:
nlmsg_free(msg);
return ret;
}
static int set_active_rx_sa(const struct macsec_genl_ctx *ctx, int ifindex,
u64 sci, unsigned char an, Boolean state)
{
struct nl_msg *msg;
struct nlattr *nest;
int ret = -1;
msg = msg_prepare(MACSEC_CMD_UPD_RXSA, ctx, ifindex);
if (!msg)
return ret;
if (nla_put_rxsc_config(msg, sci))
goto nla_put_failure;
nest = nla_nest_start(msg, MACSEC_ATTR_SA_CONFIG);
if (!nest)
goto nla_put_failure;
NLA_PUT_U8(msg, MACSEC_SA_ATTR_AN, an);
NLA_PUT_U8(msg, MACSEC_SA_ATTR_ACTIVE, !!state);
nla_nest_end(msg, nest);
ret = nl_send_recv(ctx->sk, msg);
if (ret < 0)
wpa_printf(MSG_ERROR,
DRV_PREFIX "%s: failed to communicate: %d (%s)",
__func__, ret, nl_geterror(-ret));
nla_put_failure:
nlmsg_free(msg);
return ret;
}
/**
* macsec_drv_enable_receive_sa - Enable the SA for receive
* @priv: private driver interface data from init()
* @sa: secure association
* Returns: 0 on success, -1 on failure
*/
static int macsec_drv_enable_receive_sa(void *priv, struct receive_sa *sa)
{
struct macsec_drv_data *drv = priv;
struct macsec_genl_ctx *ctx = &drv->ctx;
wpa_printf(MSG_DEBUG, DRV_PREFIX "%s: enable_receive_sa -> %d on "
SCISTR, drv->ifname, sa->an,
SCI2STR(sa->sc->sci.addr, sa->sc->sci.port));
return set_active_rx_sa(ctx, drv->ifi, mka_sci_u64(&sa->sc->sci),
sa->an, TRUE);
}
/**
* macsec_drv_disable_receive_sa - Disable SA for receive
* @priv: private driver interface data from init()
* @sa: secure association
* Returns: 0 on success, -1 on failure
*/
static int macsec_drv_disable_receive_sa(void *priv, struct receive_sa *sa)
{
struct macsec_drv_data *drv = priv;
struct macsec_genl_ctx *ctx = &drv->ctx;
wpa_printf(MSG_DEBUG, DRV_PREFIX "%s: disable_receive_sa -> %d on "
SCISTR, drv->ifname, sa->an,
SCI2STR(sa->sc->sci.addr, sa->sc->sci.port));
return set_active_rx_sa(ctx, drv->ifi, mka_sci_u64(&sa->sc->sci),
sa->an, FALSE);
}
static struct rtnl_link * lookup_sc(struct nl_cache *cache, int parent, u64 sci)
{
struct rtnl_link *needle;
void *match;
needle = rtnl_link_macsec_alloc();
if (!needle)
return NULL;
rtnl_link_set_link(needle, parent);
rtnl_link_macsec_set_sci(needle, sci);
match = nl_cache_find(cache, (struct nl_object *) needle);
rtnl_link_put(needle);
return (struct rtnl_link *) match;
}
/**
* macsec_drv_create_transmit_sc - Create secure connection for transmit
* @priv: private driver interface data from init()
* @sc: secure channel
* @conf_offset: confidentiality offset
* Returns: 0 on success, -1 on failure
*/
static int macsec_drv_create_transmit_sc(
void *priv, struct transmit_sc *sc,
unsigned int conf_offset)
{
struct macsec_drv_data *drv = priv;
struct rtnl_link *link;
char *ifname;
u64 sci;
int err;
wpa_printf(MSG_DEBUG, DRV_PREFIX
"%s: create_transmit_sc -> " SCISTR " (conf_offset=%d)",
drv->common.ifname, SCI2STR(sc->sci.addr, sc->sci.port),
conf_offset);
if (!drv->sk) {
wpa_printf(MSG_ERROR, DRV_PREFIX "NULL rtnl socket");
return -1;
}
link = rtnl_link_macsec_alloc();
if (!link) {
wpa_printf(MSG_ERROR, DRV_PREFIX "couldn't allocate link");
return -1;
}
rtnl_link_set_link(link, drv->parent_ifi);
sci = mka_sci_u64(&sc->sci);
rtnl_link_macsec_set_sci(link, sci);
drv->created_link = TRUE;
err = rtnl_link_add(drv->sk, link, NLM_F_CREATE);
if (err == -NLE_BUSY) {
wpa_printf(MSG_INFO,
DRV_PREFIX "link already exists, using it");
drv->created_link = FALSE;
} else if (err < 0) {
rtnl_link_put(link);
wpa_printf(MSG_ERROR, DRV_PREFIX "couldn't create link: err %d",
err);
return err;
}
rtnl_link_put(link);
nl_cache_refill(drv->sk, drv->link_cache);
link = lookup_sc(drv->link_cache, drv->parent_ifi, sci);
if (!link) {
wpa_printf(MSG_ERROR, DRV_PREFIX "couldn't find link");
return -1;
}
drv->ifi = rtnl_link_get_ifindex(link);
ifname = rtnl_link_get_name(link);
wpa_printf(MSG_DEBUG,
DRV_PREFIX "%s: create_transmit_sc: ifi=%d ifname=%s",
drv->common.ifname, drv->ifi, ifname);
os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
rtnl_link_put(link);
drv->link = rtnl_link_macsec_alloc();
if (!drv->link) {
wpa_printf(MSG_ERROR, DRV_PREFIX "couldn't allocate link");
return -1;
}
rtnl_link_set_name(drv->link, drv->ifname);
/* In case some settings have already been done but we couldn't apply
* them. */
return try_commit(drv);
}
/**
* macsec_drv_delete_transmit_sc - Delete secure connection for transmit
* @priv: private driver interface data from init()
* @sc: secure channel
* Returns: 0 on success, -1 on failure
*/
static int macsec_drv_delete_transmit_sc(void *priv, struct transmit_sc *sc)
{
struct macsec_drv_data *drv = priv;
int err;
wpa_printf(MSG_DEBUG, DRV_PREFIX "%s: delete_transmit_sc -> " SCISTR,
drv->ifname, SCI2STR(sc->sci.addr, sc->sci.port));
if (!drv->sk)
return 0;
if (!drv->created_link) {
rtnl_link_put(drv->link);
drv->link = NULL;
wpa_printf(MSG_DEBUG, DRV_PREFIX
"we didn't create the link, leave it alone");
return 0;
}
err = rtnl_link_delete(drv->sk, drv->link);
if (err < 0)
wpa_printf(MSG_ERROR, DRV_PREFIX "couldn't delete link");
rtnl_link_put(drv->link);
drv->link = NULL;
return err;
}
/**
* macsec_drv_create_transmit_sa - Create secure association for transmit
* @priv: private driver interface data from init()
* @sa: secure association
* Returns: 0 on success, -1 on failure
*/
static int macsec_drv_create_transmit_sa(void *priv, struct transmit_sa *sa)
{
struct macsec_drv_data *drv = priv;
struct macsec_genl_ctx *ctx = &drv->ctx;
struct nl_msg *msg;
struct nlattr *nest;
int ret = -1;
wpa_printf(MSG_DEBUG, DRV_PREFIX "%s: create_transmit_sa -> %d on "
SCISTR " (enable_transmit=%d next_pn=%u)",
drv->ifname, sa->an,
SCI2STR(sa->sc->sci.addr, sa->sc->sci.port),
sa->enable_transmit, sa->next_pn);
wpa_hexdump(MSG_DEBUG, DRV_PREFIX "SA keyid",
&sa->pkey->key_identifier,
sizeof(sa->pkey->key_identifier));
wpa_hexdump_key(MSG_DEBUG, DRV_PREFIX "SA key",
sa->pkey->key, sa->pkey->key_len);
msg = msg_prepare(MACSEC_CMD_ADD_TXSA, ctx, drv->ifi);
if (!msg)
return ret;
nest = nla_nest_start(msg, MACSEC_ATTR_SA_CONFIG);
if (!nest)
goto nla_put_failure;
NLA_PUT_U8(msg, MACSEC_SA_ATTR_AN, sa->an);
NLA_PUT_U32(msg, MACSEC_SA_ATTR_PN, sa->next_pn);
NLA_PUT(msg, MACSEC_SA_ATTR_KEYID, sizeof(sa->pkey->key_identifier),
&sa->pkey->key_identifier);
NLA_PUT(msg, MACSEC_SA_ATTR_KEY, sa->pkey->key_len, sa->pkey->key);
NLA_PUT_U8(msg, MACSEC_SA_ATTR_ACTIVE, sa->enable_transmit);
nla_nest_end(msg, nest);
ret = nl_send_recv(ctx->sk, msg);
if (ret < 0) {
wpa_printf(MSG_ERROR,
DRV_PREFIX "%s: failed to communicate: %d (%s)",
__func__, ret, nl_geterror(-ret));
}
nla_put_failure:
nlmsg_free(msg);
return ret;
}
/**
* macsec_drv_delete_transmit_sa - Delete secure association for transmit
* @priv: private driver interface data from init()
* @sa: secure association
* Returns: 0 on success, -1 on failure
*/
static int macsec_drv_delete_transmit_sa(void *priv, struct transmit_sa *sa)
{
struct macsec_drv_data *drv = priv;
struct macsec_genl_ctx *ctx = &drv->ctx;
struct nl_msg *msg;
struct nlattr *nest;
int ret = -1;
wpa_printf(MSG_DEBUG, DRV_PREFIX "%s: delete_transmit_sa -> %d on "
SCISTR, drv->ifname, sa->an,
SCI2STR(sa->sc->sci.addr, sa->sc->sci.port));
msg = msg_prepare(MACSEC_CMD_DEL_TXSA, ctx, drv->ifi);
if (!msg)
return ret;
nest = nla_nest_start(msg, MACSEC_ATTR_SA_CONFIG);
if (!nest)
goto nla_put_failure;
NLA_PUT_U8(msg, MACSEC_SA_ATTR_AN, sa->an);
nla_nest_end(msg, nest);
ret = nl_send_recv(ctx->sk, msg);
if (ret < 0) {
wpa_printf(MSG_ERROR,
DRV_PREFIX "%s: failed to communicate: %d (%s)",
__func__, ret, nl_geterror(-ret));
}
nla_put_failure:
nlmsg_free(msg);
return ret;
}
static int set_active_tx_sa(const struct macsec_genl_ctx *ctx, int ifindex,
unsigned char an, Boolean state)
{
struct nl_msg *msg;
struct nlattr *nest;
int ret = -1;
msg = msg_prepare(MACSEC_CMD_UPD_TXSA, ctx, ifindex);
if (!msg)
return ret;
nest = nla_nest_start(msg, MACSEC_ATTR_SA_CONFIG);
if (!nest)
goto nla_put_failure;
NLA_PUT_U8(msg, MACSEC_SA_ATTR_AN, an);
NLA_PUT_U8(msg, MACSEC_SA_ATTR_ACTIVE, !!state);
nla_nest_end(msg, nest);
ret = nl_send_recv(ctx->sk, msg);
if (ret < 0) {
wpa_printf(MSG_ERROR,
DRV_PREFIX "%s: failed to communicate: %d (%s)",
__func__, ret, nl_geterror(-ret));
}
nla_put_failure:
nlmsg_free(msg);
return ret;
}
/**
* macsec_drv_enable_transmit_sa - Enable SA for transmit
* @priv: private driver interface data from init()
* @sa: secure association
* Returns: 0 on success, -1 on failure
*/
static int macsec_drv_enable_transmit_sa(void *priv, struct transmit_sa *sa)
{
struct macsec_drv_data *drv = priv;
struct macsec_genl_ctx *ctx = &drv->ctx;
int ret;
wpa_printf(MSG_DEBUG, DRV_PREFIX "%s: enable_transmit_sa -> %d on "
SCISTR, drv->ifname, sa->an,
SCI2STR(sa->sc->sci.addr, sa->sc->sci.port));
ret = set_active_tx_sa(ctx, drv->ifi, sa->an, TRUE);
if (ret < 0) {
wpa_printf(MSG_ERROR, DRV_PREFIX "failed to enable txsa");
return ret;
}
drv->encoding_sa_set = TRUE;
drv->encoding_sa = sa->an;
return try_commit(drv);
}
/**
* macsec_drv_disable_transmit_sa - Disable SA for transmit
* @priv: private driver interface data from init()
* @sa: secure association
* Returns: 0 on success, -1 on failure
*/
static int macsec_drv_disable_transmit_sa(void *priv, struct transmit_sa *sa)
{
struct macsec_drv_data *drv = priv;
struct macsec_genl_ctx *ctx = &drv->ctx;
wpa_printf(MSG_DEBUG, DRV_PREFIX "%s: disable_transmit_sa -> %d on "
SCISTR, drv->ifname, sa->an,
SCI2STR(sa->sc->sci.addr, sa->sc->sci.port));
return set_active_tx_sa(ctx, drv->ifi, sa->an, FALSE);
}
static int macsec_drv_status(void *priv, char *buf, size_t buflen)
{
struct macsec_drv_data *drv = priv;
int res;
char *pos, *end;
pos = buf;
end = buf + buflen;
res = os_snprintf(pos, end - pos,
"ifname=%s\n"
"ifi=%d\n"
"parent_ifname=%s\n"
"parent_ifi=%d\n",
drv->common.ifname, drv->ifi,
drv->ifname, drv->parent_ifi);
if (os_snprintf_error(end - pos, res))
return pos - buf;
pos += res;
return pos - buf;
}
const struct wpa_driver_ops wpa_driver_macsec_linux_ops = {
.name = "macsec_linux",
.desc = "MACsec Ethernet driver for Linux",
.get_ssid = driver_wired_get_ssid,
.get_bssid = driver_wired_get_bssid,
.get_capa = driver_wired_get_capa,
.init = macsec_drv_wpa_init,
.deinit = macsec_drv_wpa_deinit,
.macsec_init = macsec_drv_macsec_init,
.macsec_deinit = macsec_drv_macsec_deinit,
.macsec_get_capability = macsec_drv_get_capability,
.enable_protect_frames = macsec_drv_enable_protect_frames,
.enable_encrypt = macsec_drv_enable_encrypt,
.set_replay_protect = macsec_drv_set_replay_protect,
.set_current_cipher_suite = macsec_drv_set_current_cipher_suite,
.enable_controlled_port = macsec_drv_enable_controlled_port,
.get_receive_lowest_pn = macsec_drv_get_receive_lowest_pn,
.set_receive_lowest_pn = macsec_drv_set_receive_lowest_pn,
.get_transmit_next_pn = macsec_drv_get_transmit_next_pn,
.set_transmit_next_pn = macsec_drv_set_transmit_next_pn,
.create_receive_sc = macsec_drv_create_receive_sc,
.delete_receive_sc = macsec_drv_delete_receive_sc,
.create_receive_sa = macsec_drv_create_receive_sa,
.delete_receive_sa = macsec_drv_delete_receive_sa,
.enable_receive_sa = macsec_drv_enable_receive_sa,
.disable_receive_sa = macsec_drv_disable_receive_sa,
.create_transmit_sc = macsec_drv_create_transmit_sc,
.delete_transmit_sc = macsec_drv_delete_transmit_sc,
.create_transmit_sa = macsec_drv_create_transmit_sa,
.delete_transmit_sa = macsec_drv_delete_transmit_sa,
.enable_transmit_sa = macsec_drv_enable_transmit_sa,
.disable_transmit_sa = macsec_drv_disable_transmit_sa,
.status = macsec_drv_status,
};