| #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."); |