#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
-
+#include <stdbool.h>
+
#include <netlink/genl/genl.h>
#include <netlink/genl/family.h>
-#include <netlink/genl/ctrl.h>
+#include <netlink/genl/ctrl.h>
#include <netlink/msg.h>
#include <netlink/attr.h>
#include "nl80211.h"
#include "iw.h"
-#include "version.h"
-static int debug = 0;
+/* libnl 1.x compatibility code */
+#if !defined(CONFIG_LIBNL20) && !defined(CONFIG_LIBNL30)
+static inline struct nl_handle *nl_socket_alloc(void)
+{
+ return nl_handle_alloc();
+}
+
+static inline void nl_socket_free(struct nl_sock *h)
+{
+ nl_handle_destroy(h);
+}
+#endif /* CONFIG_LIBNL20 && CONFIG_LIBNL30 */
+
+int iw_debug = 0;
static int nl80211_init(struct nl80211_state *state)
{
int err;
- state->nl_handle = nl_handle_alloc();
- if (!state->nl_handle) {
- fprintf(stderr, "Failed to allocate netlink handle.\n");
+ state->nl_sock = nl_socket_alloc();
+ if (!state->nl_sock) {
+ fprintf(stderr, "Failed to allocate netlink socket.\n");
return -ENOMEM;
}
- if (genl_connect(state->nl_handle)) {
+ if (genl_connect(state->nl_sock)) {
fprintf(stderr, "Failed to connect to generic netlink.\n");
err = -ENOLINK;
goto out_handle_destroy;
}
- state->nl_cache = genl_ctrl_alloc_cache(state->nl_handle);
- if (!state->nl_cache) {
- fprintf(stderr, "Failed to allocate generic netlink cache.\n");
- err = -ENOMEM;
- goto out_handle_destroy;
- }
-
- state->nl80211 = genl_ctrl_search_by_name(state->nl_cache, "nl80211");
- if (!state->nl80211) {
+ state->nl80211_id = genl_ctrl_resolve(state->nl_sock, "nl80211");
+ if (state->nl80211_id < 0) {
fprintf(stderr, "nl80211 not found.\n");
err = -ENOENT;
- goto out_cache_free;
+ goto out_handle_destroy;
}
return 0;
- out_cache_free:
- nl_cache_free(state->nl_cache);
out_handle_destroy:
- nl_handle_destroy(state->nl_handle);
+ nl_socket_free(state->nl_sock);
return err;
}
static void nl80211_cleanup(struct nl80211_state *state)
{
- genl_family_put(state->nl80211);
- nl_cache_free(state->nl_cache);
- nl_handle_destroy(state->nl_handle);
+ nl_socket_free(state->nl_sock);
}
-__COMMAND(NULL, NULL, NULL, 0, 0, 0, CIB_NONE, NULL);
-__COMMAND(NULL, NULL, NULL, 1, 0, 0, CIB_NONE, NULL);
-
static int cmd_size;
-static void usage(const char *argv0)
+extern struct cmd __start___cmd;
+extern struct cmd __stop___cmd;
+
+#define for_each_cmd(_cmd) \
+ for (_cmd = &__start___cmd; _cmd < &__stop___cmd; \
+ _cmd = (const struct cmd *)((char *)_cmd + cmd_size))
+
+
+static void __usage_cmd(const struct cmd *cmd, char *indent, bool full)
+{
+ const char *start, *lend, *end;
+
+ printf("%s", indent);
+
+ switch (cmd->idby) {
+ case CIB_NONE:
+ break;
+ case CIB_PHY:
+ printf("phy <phyname> ");
+ break;
+ case CIB_NETDEV:
+ printf("dev <devname> ");
+ break;
+ }
+ if (cmd->parent && cmd->parent->name)
+ printf("%s ", cmd->parent->name);
+ printf("%s", cmd->name);
+ if (cmd->args)
+ printf(" %s", cmd->args);
+ printf("\n");
+
+ if (!full || !cmd->help)
+ return;
+
+ /* hack */
+ if (strlen(indent))
+ indent = "\t\t";
+ else
+ printf("\n");
+
+ /* print line by line */
+ start = cmd->help;
+ end = strchr(start, '\0');
+ do {
+ lend = strchr(start, '\n');
+ if (!lend)
+ lend = end;
+ printf("%s", indent);
+ printf("%.*s\n", (int)(lend - start), start);
+ start = lend + 1;
+ } while (end != lend);
+
+ printf("\n");
+}
+
+static void usage_options(void)
{
- struct cmd *cmd;
-
- fprintf(stderr, "Usage:\t%s [options] command\n", argv0);
- fprintf(stderr, "Options:\n");
- fprintf(stderr, "\t--debug\t\tenable netlink debugging\n");
- fprintf(stderr, "\t--version\tshow version\n");
- fprintf(stderr, "Commands:\n");
- fprintf(stderr, "\thelp\n");
- fprintf(stderr, "\tevent\n");
- for (cmd = &__start___cmd; cmd < &__stop___cmd;
- cmd = (struct cmd *)((char *)cmd + cmd_size)) {
- if (!cmd->handler || cmd->hidden)
+ printf("Options:\n");
+ printf("\t--debug\t\tenable netlink debugging\n");
+}
+
+static const char *argv0;
+
+static void usage(int argc, char **argv)
+{
+ const struct cmd *section, *cmd;
+ bool full = argc >= 0;
+ const char *sect_filt = NULL;
+ const char *cmd_filt = NULL;
+
+ if (argc > 0)
+ sect_filt = argv[0];
+
+ if (argc > 1)
+ cmd_filt = argv[1];
+
+ printf("Usage:\t%s [options] command\n", argv0);
+ usage_options();
+ printf("\t--version\tshow version (%s)\n", iw_version);
+ printf("Commands:\n");
+ for_each_cmd(section) {
+ if (section->parent)
continue;
- switch (cmd->idby) {
- case CIB_NONE:
- fprintf(stderr, "\t");
- /* fall through */
- case CIB_PHY:
- if (cmd->idby == CIB_PHY)
- fprintf(stderr, "\tphy <phyname> ");
- /* fall through */
- case CIB_NETDEV:
- if (cmd->idby == CIB_NETDEV)
- fprintf(stderr, "\tdev <devname> ");
- if (cmd->section)
- fprintf(stderr, "%s ", cmd->section);
- fprintf(stderr, "%s", cmd->name);
- if (cmd->args)
- fprintf(stderr, " %s", cmd->args);
- fprintf(stderr, "\n");
- break;
+
+ if (sect_filt && strcmp(section->name, sect_filt))
+ continue;
+
+ if (section->handler && !section->hidden)
+ __usage_cmd(section, "\t", full);
+
+ for_each_cmd(cmd) {
+ if (section != cmd->parent)
+ continue;
+ if (!cmd->handler || cmd->hidden)
+ continue;
+ if (cmd_filt && strcmp(cmd->name, cmd_filt))
+ continue;
+ __usage_cmd(cmd, "\t", full);
}
}
+ printf("\nYou can omit the 'phy' or 'dev' if "
+ "the identification is unique,\n"
+ "e.g. \"iw wlan0 info\" or \"iw phy0 info\". "
+ "(Don't when scripting.)\n\n"
+ "Do NOT screenscrape this tool, we don't "
+ "consider its output stable.\n\n");
+}
+
+static int print_help(struct nl80211_state *state,
+ struct nl_cb *cb,
+ struct nl_msg *msg,
+ int argc, char **argv)
+{
+ exit(3);
+}
+TOPLEVEL(help, "[command]", 0, 0, CIB_NONE, print_help,
+ "Print usage for all or a specific command, e.g.\n"
+ "\"help wowlan\" or \"help wowlan enable\".");
+
+static void usage_cmd(const struct cmd *cmd)
+{
+ printf("Usage:\t%s [options] ", argv0);
+ __usage_cmd(cmd, "", true);
+ usage_options();
}
static void version(void)
{
- printf("iw version " IW_VERSION "\n");
+ printf("iw version %s\n", iw_version);
}
static int phy_lookup(char *name)
snprintf(buf, sizeof(buf), "/sys/class/ieee80211/%s/index", name);
fd = open(buf, O_RDONLY);
+ if (fd < 0)
+ return -1;
pos = read(fd, buf, sizeof(buf) - 1);
- if (pos < 0)
+ if (pos < 0) {
+ close(fd);
return -1;
+ }
buf[pos] = '\0';
+ close(fd);
return atoi(buf);
}
return NL_STOP;
}
-static int handle_cmd(struct nl80211_state *state,
- enum command_identify_by idby,
- int argc, char **argv)
+static int __handle_cmd(struct nl80211_state *state, enum id_input idby,
+ int argc, char **argv, const struct cmd **cmdout)
{
- struct cmd *cmd;
- struct nl_cb *cb = NULL;
+ const struct cmd *cmd, *match = NULL, *sectcmd;
+ struct nl_cb *cb;
+ struct nl_cb *s_cb;
struct nl_msg *msg;
int devidx = 0;
- int err;
+ int err, o_argc;
const char *command, *section;
+ char *tmp, **o_argv;
+ enum command_identify_by command_idby = CIB_NONE;
- if (argc <= 1 && idby != CIB_NONE)
+ if (argc <= 1 && idby != II_NONE)
return 1;
+ o_argc = argc;
+ o_argv = argv;
+
switch (idby) {
- case CIB_PHY:
+ case II_PHY_IDX:
+ command_idby = CIB_PHY;
+ devidx = strtoul(*argv + 4, &tmp, 0);
+ if (*tmp != '\0')
+ return 1;
+ argc--;
+ argv++;
+ break;
+ case II_PHY_NAME:
+ command_idby = CIB_PHY;
devidx = phy_lookup(*argv);
argc--;
argv++;
break;
- case CIB_NETDEV:
+ case II_NETDEV:
+ command_idby = CIB_NETDEV;
devidx = if_nametoindex(*argv);
+ if (devidx == 0)
+ devidx = -1;
argc--;
argv++;
break;
break;
}
- section = command = *argv;
+ if (devidx < 0)
+ return -errno;
+
+ section = *argv;
argc--;
argv++;
- for (cmd = &__start___cmd; cmd < &__stop___cmd;
- cmd = (struct cmd *)((char *)cmd + cmd_size)) {
- if (!cmd->handler)
+ for_each_cmd(sectcmd) {
+ if (sectcmd->parent)
continue;
- if (cmd->idby != idby)
+ /* ok ... bit of a hack for the dupe 'info' section */
+ if (match && sectcmd->idby != command_idby)
continue;
- if (cmd->section) {
- if (strcmp(cmd->section, section))
+ if (strcmp(sectcmd->name, section) == 0)
+ match = sectcmd;
+ }
+
+ sectcmd = match;
+ match = NULL;
+ if (!sectcmd)
+ return 1;
+
+ if (argc > 0) {
+ command = *argv;
+
+ for_each_cmd(cmd) {
+ if (!cmd->handler)
continue;
- /* this is a bit icky ... */
- if (command == section) {
- if (argc <= 0)
- return 1;
- command = *argv;
- argc--;
- argv++;
- }
- } else if (section != command)
- continue;
- if (strcmp(cmd->name, command))
- continue;
+ if (cmd->parent != sectcmd)
+ continue;
+ if (cmd->idby != command_idby)
+ continue;
+ if (strcmp(cmd->name, command))
+ continue;
+ if (argc > 1 && !cmd->args)
+ continue;
+ match = cmd;
+ break;
+ }
+
+ if (match) {
+ argc--;
+ argv++;
+ }
+ }
+
+ if (match)
+ cmd = match;
+ else {
+ /* Use the section itself, if possible. */
+ cmd = sectcmd;
if (argc && !cmd->args)
- continue;
- break;
+ return 1;
+ if (cmd->idby != command_idby)
+ return 1;
+ if (!cmd->handler)
+ return 1;
}
- if (cmd >= &__stop___cmd)
- return 1;
+ if (cmd->selector) {
+ cmd = cmd->selector(argc, argv);
+ if (!cmd)
+ return 1;
+ }
+
+ if (cmdout)
+ *cmdout = cmd;
+
+ if (!cmd->cmd) {
+ argc = o_argc;
+ argv = o_argv;
+ return cmd->handler(state, NULL, NULL, argc, argv);
+ }
msg = nlmsg_alloc();
if (!msg) {
return 2;
}
- cb = nl_cb_alloc(debug ? NL_CB_DEBUG : NL_CB_DEFAULT);
- if (!cb) {
+ cb = nl_cb_alloc(iw_debug ? NL_CB_DEBUG : NL_CB_DEFAULT);
+ s_cb = nl_cb_alloc(iw_debug ? NL_CB_DEBUG : NL_CB_DEFAULT);
+ if (!cb || !s_cb) {
fprintf(stderr, "failed to allocate netlink callbacks\n");
err = 2;
goto out_free_msg;
}
- genlmsg_put(msg, 0, 0, genl_family_get_id(state->nl80211), 0,
+ genlmsg_put(msg, 0, 0, state->nl80211_id, 0,
cmd->nl_msg_flags, cmd->cmd, 0);
- switch (idby) {
+ switch (command_idby) {
case CIB_PHY:
NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, devidx);
break;
break;
}
- err = cmd->handler(cb, msg, argc, argv);
+ err = cmd->handler(state, cb, msg, argc, argv);
if (err)
goto out;
- err = nl_send_auto_complete(state->nl_handle, msg);
+ nl_socket_set_cb(state->nl_sock, s_cb);
+
+ err = nl_send_auto_complete(state->nl_sock, msg);
if (err < 0)
goto out;
nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
while (err > 0)
- nl_recvmsgs(state->nl_handle, cb);
+ nl_recvmsgs(state->nl_sock, cb);
out:
nl_cb_put(cb);
out_free_msg:
return 2;
}
-static int no_seq_check(struct nl_msg *msg, void *arg)
-{
- return NL_OK;
-}
-
-static int print_event(struct nl_msg *msg, void *arg)
+int handle_cmd(struct nl80211_state *state, enum id_input idby,
+ int argc, char **argv)
{
- struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
- struct nlattr *tb[NL80211_ATTR_MAX + 1];
-
- nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
- genlmsg_attrlen(gnlh, 0), NULL);
-
- switch (gnlh->cmd) {
- case NL80211_CMD_NEW_WIPHY: {
- printf("wiphy rename: phy #%d to %s\n",
- nla_get_u32(tb[NL80211_ATTR_WIPHY]),
- nla_get_string(tb[NL80211_ATTR_WIPHY_NAME]));
- break;
- }
- }
-
- return NL_SKIP;
-}
-
-static int listen_events(struct nl80211_state *state,
- int argc, char **argv)
-{
- int mcid, ret;
- struct nl_cb *cb = nl_cb_alloc(debug ? NL_CB_DEBUG : NL_CB_DEFAULT);
-
- if (!cb) {
- fprintf(stderr, "failed to allocate netlink callbacks\n");
- return -ENOMEM;
- }
-
- mcid = nl_get_multicast_id(state->nl_handle, "nl80211", "config");
- if (mcid < 0)
- return mcid;
-
- ret = nl_socket_add_membership(state->nl_handle, mcid);
- if (ret)
- return ret;
-
- /* no sequence checking for multicast messages */
- nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
- nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, print_event, NULL);
-
- while (1)
- nl_recvmsgs(state->nl_handle, cb);
-
- nl_cb_put(cb);
-
- return 0;
+ return __handle_cmd(state, idby, argc, argv, NULL);
}
int main(int argc, char **argv)
{
struct nl80211_state nlstate;
int err;
- const char *argv0;
+ const struct cmd *cmd = NULL;
/* calculate command size including padding */
- cmd_size = abs((long)&__cmd_NULL_1_CIB_NONE_0
- - (long)&__cmd_NULL_0_CIB_NONE_0);
+ cmd_size = abs((long)&__section_set - (long)&__section_get);
/* strip off self */
argc--;
argv0 = *argv++;
if (argc > 0 && strcmp(*argv, "--debug") == 0) {
- debug = 1;
+ iw_debug = 1;
argc--;
argv++;
}
return 0;
}
+ /* need to treat "help" command specially so it works w/o nl80211 */
if (argc == 0 || strcmp(*argv, "help") == 0) {
- usage(argv0);
+ usage(argc - 1, argv + 1);
return 0;
}
if (err)
return 1;
- if (strcmp(*argv, "event") == 0) {
- err = listen_events(&nlstate, argc, argv);
- } else if (strcmp(*argv, "dev") == 0) {
- argc--;
- argv++;
- err = handle_cmd(&nlstate, CIB_NETDEV, argc, argv);
- } else if (strcmp(*argv, "phy") == 0) {
+ if (strcmp(*argv, "dev") == 0 && argc > 1) {
argc--;
argv++;
- err = handle_cmd(&nlstate, CIB_PHY, argc, argv);
- } else
- err = handle_cmd(&nlstate, CIB_NONE, argc, argv);
+ err = __handle_cmd(&nlstate, II_NETDEV, argc, argv, &cmd);
+ } else if (strncmp(*argv, "phy", 3) == 0 && argc > 1) {
+ if (strlen(*argv) == 3) {
+ argc--;
+ argv++;
+ err = __handle_cmd(&nlstate, II_PHY_NAME, argc, argv, &cmd);
+ } else if (*(*argv + 3) == '#')
+ err = __handle_cmd(&nlstate, II_PHY_IDX, argc, argv, &cmd);
+ else
+ goto detect;
+ } else {
+ int idx;
+ enum id_input idby = II_NONE;
+ detect:
+ if ((idx = if_nametoindex(argv[0])) != 0)
+ idby = II_NETDEV;
+ else if ((idx = phy_lookup(argv[0])) >= 0)
+ idby = II_PHY_NAME;
+ err = __handle_cmd(&nlstate, idby, argc, argv, &cmd);
+ }
- if (err == 1)
- usage(argv0);
- if (err < 0)
+ if (err == 1) {
+ if (cmd)
+ usage_cmd(cmd);
+ else
+ usage(0, NULL);
+ } else if (err < 0)
fprintf(stderr, "command failed: %s (%d)\n", strerror(-err), err);
nl80211_cleanup(&nlstate);
projects / thirdparty / iw.git / blobdiff