blob: 7c6ab3db15d6c50663b0b79b88e0e9db1b0d0772 [file] [log] [blame] [edit]
#include <net/if.h>
#include <errno.h>
#include <string.h>
#include <netlink/genl/genl.h>
#include <netlink/genl/family.h>
#include <netlink/genl/ctrl.h>
#include <netlink/msg.h>
#include <netlink/attr.h>
#include "nl80211.h"
#include "iw.h"
SECTION(mesh);
typedef struct _any_t {
union {
uint32_t as_32;
uint16_t as_16;
uint8_t as_8;
} u;
} _any;
/* describes a mesh parameter */
struct mesh_param_descr {
const char *name;
enum nl80211_meshconf_params mesh_param_num;
int (*nla_put_fn)(struct nl_msg*, int, _any*);
uint32_t (*parse_fn)(const char*, _any*);
void (*nla_print_fn)(struct nlattr *);
};
/* utility functions for manipulating and printing u8/u16/u32 values and
* timesouts. */
static int _my_nla_put_u8(struct nl_msg *n, int mesh_param_num, _any *value)
{
return nla_put(n, mesh_param_num, sizeof(uint8_t), &value->u.as_8);
}
static int _my_nla_put_u16(struct nl_msg *n, int mesh_param_num, _any *value)
{
return nla_put(n, mesh_param_num, sizeof(uint16_t), &value->u.as_16);
}
static int _my_nla_put_u32(struct nl_msg *n, int mesh_param_num, _any *value)
{
return nla_put(n, mesh_param_num, sizeof(uint32_t), &value->u.as_32);
}
static uint32_t _parse_u8(const char *str, _any *ret)
{
char *endptr = NULL;
unsigned long int v = strtoul(str, &endptr, 10);
if (*endptr != '\0')
return 0xff;
if (v > 0xff)
return 0xff;
ret->u.as_8 = (uint8_t)v;
return 0;
}
static uint32_t _parse_u8_as_bool(const char *str, _any *ret)
{
char *endptr = NULL;
unsigned long int v = strtoul(str, &endptr, 10);
if (*endptr != '\0')
return 0x1;
if (v > 0x1)
return 0x1;
ret->u.as_8 = (uint8_t)v;
return 0;
}
static uint32_t _parse_u16(const char *str, _any *ret)
{
char *endptr = NULL;
long int v = strtol(str, &endptr, 10);
if (*endptr != '\0')
return 0xffff;
if ((v < 0) || (v > 0xffff))
return 0xffff;
ret->u.as_16 = (uint16_t)v;
return 0;
}
static uint32_t _parse_u32(const char *str, _any *ret)
{
char *endptr = NULL;
long long int v = strtoll(str, &endptr, 10);
if (*endptr != '\0')
return 0xffffffff;
if ((v < 0) || (v > 0xffffffff))
return 0xffffffff;
ret->u.as_32 = (uint32_t)v;
return 0;
}
static void _print_u8(struct nlattr *a)
{
printf("%d", nla_get_u8(a));
}
static void _print_u16(struct nlattr *a)
{
printf("%d", nla_get_u16(a));
}
static void _print_u16_timeout(struct nlattr *a)
{
printf("%d milliseconds", nla_get_u16(a));
}
static void _print_u16_in_TUs(struct nlattr *a)
{
printf("%d TUs", nla_get_u16(a));
}
static void _print_u32_timeout(struct nlattr *a)
{
printf("%u milliseconds", nla_get_u32(a));
}
static void _print_u32_in_TUs(struct nlattr *a)
{
printf("%d TUs", nla_get_u32(a));
}
/* The current mesh parameters */
const static struct mesh_param_descr _mesh_param_descrs[] =
{
{"mesh_retry_timeout",
NL80211_MESHCONF_RETRY_TIMEOUT,
_my_nla_put_u16, _parse_u16, _print_u16_timeout},
{"mesh_confirm_timeout",
NL80211_MESHCONF_CONFIRM_TIMEOUT,
_my_nla_put_u16, _parse_u16, _print_u16_timeout},
{"mesh_holding_timeout",
NL80211_MESHCONF_HOLDING_TIMEOUT,
_my_nla_put_u16, _parse_u16, _print_u16_timeout},
{"mesh_max_peer_links",
NL80211_MESHCONF_MAX_PEER_LINKS,
_my_nla_put_u16, _parse_u16, _print_u16},
{"mesh_max_retries",
NL80211_MESHCONF_MAX_RETRIES,
_my_nla_put_u8, _parse_u8, _print_u8},
{"mesh_ttl",
NL80211_MESHCONF_TTL,
_my_nla_put_u8, _parse_u8, _print_u8},
{"mesh_element_ttl",
NL80211_MESHCONF_ELEMENT_TTL,
_my_nla_put_u8, _parse_u8, _print_u8},
{"mesh_auto_open_plinks",
NL80211_MESHCONF_AUTO_OPEN_PLINKS,
_my_nla_put_u8, _parse_u8_as_bool, _print_u8},
{"mesh_hwmp_max_preq_retries",
NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
_my_nla_put_u8, _parse_u8, _print_u8},
{"mesh_path_refresh_time",
NL80211_MESHCONF_PATH_REFRESH_TIME,
_my_nla_put_u32, _parse_u32, _print_u32_timeout},
{"mesh_min_discovery_timeout",
NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
_my_nla_put_u16, _parse_u16, _print_u16_timeout},
{"mesh_hwmp_active_path_timeout",
NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
_my_nla_put_u32, _parse_u32, _print_u32_in_TUs},
{"mesh_hwmp_preq_min_interval",
NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
_my_nla_put_u16, _parse_u16, _print_u16_in_TUs},
{"mesh_hwmp_net_diameter_traversal_time",
NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
_my_nla_put_u16, _parse_u16, _print_u16_in_TUs},
{"mesh_hwmp_rootmode", NL80211_MESHCONF_HWMP_ROOTMODE,
_my_nla_put_u8, _parse_u8, _print_u8},
};
static void print_all_mesh_param_descr(void)
{
int i;
printf("Possible mesh parameters are:\n");
for (i = 0; i < ARRAY_SIZE(_mesh_param_descrs); i++)
printf(" - %s\n", _mesh_param_descrs[i].name);
}
static const struct mesh_param_descr *find_mesh_param(const char *name)
{
int i;
const struct mesh_param_descr *mdescr = NULL;
/* Find out what mesh parameter we want to change. */
for (i = 0; i < ARRAY_SIZE(_mesh_param_descrs); i++) {
if (!strcmp(_mesh_param_descrs[i].name, name))
return _mesh_param_descrs + i;
}
if (!mdescr) {
print_all_mesh_param_descr();
return NULL;
}
return mdescr;
}
/* Setter */
static int set_interface_meshparam(struct nl80211_state *state,
struct nl_cb *cb,
struct nl_msg *msg,
int argc, char **argv)
{
const struct mesh_param_descr *mdescr;
struct nlattr *container;
uint32_t ret;
int err;
container = nla_nest_start(msg, NL80211_ATTR_MESH_PARAMS);
if (!container)
return -ENOBUFS;
if (!argc)
return 1;
while (argc) {
const char *name;
char *value;
_any any;
memset(&any, 0, sizeof(_any));
name = argv[0];
value = strchr(name, '=');
if (value) {
*value = '\0';
value++;
argc--;
argv++;
} else {
/* backward compat -- accept w/o '=' */
if (argc < 2) {
printf("Must specify a value for %s.\n", name);
return 2;
}
value = argv[1];
argc -= 2;
argv += 2;
}
mdescr = find_mesh_param(name);
if (!mdescr)
return 2;
/* Parse the new value */
ret = mdescr->parse_fn(value, &any);
if (ret != 0) {
printf("%s must be set to a number "
"between 0 and %u\n", mdescr->name, ret);
return 2;
}
err = mdescr->nla_put_fn(msg, mdescr->mesh_param_num, &any);
if (err)
return err;
}
nla_nest_end(msg, container);
return err;
}
COMMAND(set, mesh_param, "<param>=<value> [<param>=<value>]*",
NL80211_CMD_SET_MESH_PARAMS, 0, CIB_NETDEV, set_interface_meshparam,
"Set mesh parameter (run command without any to see available ones).");
/* Getter */
static int print_mesh_param_handler(struct nl_msg *msg, void *arg)
{
const struct mesh_param_descr *mdescr = arg;
struct nlattr *attrs[NL80211_ATTR_MAX + 1];
struct nlattr *parent_attr;
struct nlattr *mesh_params[NL80211_MESHCONF_ATTR_MAX + 1];
struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
/* locate NL80211_ATTR_MESH_PARAMS */
nla_parse(attrs, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
genlmsg_attrlen(gnlh, 0), NULL);
parent_attr = attrs[NL80211_ATTR_MESH_PARAMS];
if (!parent_attr)
return -EINVAL;
/* unpack the mesh parameters */
if (nla_parse_nested(mesh_params, NL80211_MESHCONF_ATTR_MAX,
parent_attr, NULL))
return -EINVAL;
if (!mdescr) {
int i;
for (i = 0; i < ARRAY_SIZE(_mesh_param_descrs); i++) {
mdescr = &_mesh_param_descrs[i];
printf("%s = ", mdescr->name);
mdescr->nla_print_fn(mesh_params[mdescr->mesh_param_num]);
printf("\n");
}
return NL_SKIP;
}
/* print out the mesh parameter */
mdescr->nla_print_fn(mesh_params[mdescr->mesh_param_num]);
printf("\n");
return NL_SKIP;
}
static int get_interface_meshparam(struct nl80211_state *state,
struct nl_cb *cb,
struct nl_msg *msg,
int argc, char **argv)
{
const struct mesh_param_descr *mdescr = NULL;
if (argc > 1)
return 1;
if (argc == 1) {
mdescr = find_mesh_param(argv[0]);
if (!mdescr)
return 2;
}
nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
print_mesh_param_handler, (void *)mdescr);
return 0;
}
COMMAND(get, mesh_param, "[<param>]",
NL80211_CMD_GET_MESH_PARAMS, 0, CIB_NETDEV, get_interface_meshparam,
"Retrieve mesh parameter (run command without any to see available ones).");
static int join_mesh(struct nl80211_state *state, struct nl_cb *cb,
struct nl_msg *msg, int argc, char **argv)
{
if (argc < 1)
return 1;
NLA_PUT(msg, NL80211_ATTR_MESH_ID, strlen(argv[0]), argv[0]);
argc--;
argv++;
if (!argc)
return 0;
return set_interface_meshparam(state, cb, msg, argc, argv);
nla_put_failure:
return -ENOBUFS;
}
COMMAND(mesh, join, "<mesh ID> [<param>=<value>]*",
NL80211_CMD_JOIN_MESH, 0, CIB_NETDEV, join_mesh,
"Join a mesh with the given mesh ID and mesh parameters.");
static int leave_mesh(struct nl80211_state *state, struct nl_cb *cb,
struct nl_msg *msg, int argc, char **argv)
{
if (argc)
return 1;
return 0;
}
COMMAND(mesh, leave, NULL, NL80211_CMD_LEAVE_MESH, 0, CIB_NETDEV, leave_mesh,
"Leave a mesh.");