/*
* nl80211 userspace tool
*
- * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
- *
- * GPLv2
+ * Copyright 2007, 2008 Johannes Berg <johannes@sipsolutions.net>
*/
#include <errno.h>
#include <stdio.h>
+#include <string.h>
+#include <net/if.h>
+#include <sys/types.h>
+#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 <linux/nl80211.h>
+#include "nl80211.h"
#include "iw.h"
+/* 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);
+}
+
+static inline int nl_socket_set_buffer_size(struct nl_sock *sk,
+ int rxbuf, int txbuf)
+{
+ return nl_set_buffer_size(sk, rxbuf, txbuf);
+}
+#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)) {
+ nl_socket_set_buffer_size(state->nl_sock, 8192, 8192);
+
+ 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);
}
-/*
- * return
- * 0 - error
- * 1 - phy
- * 2 - dev
- */
-static int get_phy_or_dev(int *argc, char ***argv, char **name)
+static int cmd_size;
+
+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)
{
- char *type = (*argv)[0];
+ const char *start, *lend, *end;
- if (*argc < 2)
- return 0;
+ printf("%s", indent);
+
+ switch (cmd->idby) {
+ case CIB_NONE:
+ break;
+ case CIB_PHY:
+ printf("phy <phyname> ");
+ break;
+ case CIB_NETDEV:
+ printf("dev <devname> ");
+ break;
+ case CIB_WDEV:
+ printf("wdev <idx> ");
+ break;
+ }
+ if (cmd->parent && cmd->parent->name)
+ printf("%s ", cmd->parent->name);
+ printf("%s", cmd->name);
+
+ if (cmd->args) {
+ /* print line by line */
+ start = cmd->args;
+ end = strchr(start, '\0');
+ printf(" ");
+ do {
+ lend = strchr(start, '\n');
+ if (!lend)
+ lend = end;
+ if (start != cmd->args) {
+ printf("\t");
+ switch (cmd->idby) {
+ case CIB_NONE:
+ break;
+ case CIB_PHY:
+ printf("phy <phyname> ");
+ break;
+ case CIB_NETDEV:
+ printf("dev <devname> ");
+ break;
+ case CIB_WDEV:
+ printf("wdev <idx> ");
+ break;
+ }
+ if (cmd->parent && cmd->parent->name)
+ printf("%s ", cmd->parent->name);
+ printf("%s ", cmd->name);
+ }
+ printf("%.*s\n", (int)(lend - start), start);
+ start = lend + 1;
+ } while (end != lend);
+ } else
+ 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)
+{
+ 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];
- *name = (*argv)[1];
+ if (argc > 1)
+ cmd_filt = argv[1];
- *argc -= 2;
- *argv += 2;
+ 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;
- if (strcmp(type, "phy") == 0)
+ 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("\nCommands that use the netdev ('dev') can also be given the\n"
+ "'wdev' instead to identify the device.\n");
+ 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,
+ enum id_input id)
+{
+ 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 %s\n", iw_version);
+}
+
+static int phy_lookup(char *name)
+{
+ char buf[200];
+ int fd, pos;
+
+ 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) {
+ close(fd);
+ return -1;
+ }
+ buf[pos] = '\0';
+ close(fd);
+ return atoi(buf);
+}
+
+static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
+ void *arg)
+{
+ int *ret = arg;
+ *ret = err->error;
+ return NL_STOP;
+}
+
+static int finish_handler(struct nl_msg *msg, void *arg)
+{
+ int *ret = arg;
+ *ret = 0;
+ return NL_SKIP;
+}
+
+static int ack_handler(struct nl_msg *msg, void *arg)
+{
+ int *ret = arg;
+ *ret = 0;
+ return NL_STOP;
+}
+
+static int __handle_cmd(struct nl80211_state *state, enum id_input idby,
+ int argc, char **argv, const struct cmd **cmdout)
+{
+ const struct cmd *cmd, *match = NULL, *sectcmd;
+ struct nl_cb *cb;
+ struct nl_cb *s_cb;
+ struct nl_msg *msg;
+ signed long long devidx = 0;
+ int err, o_argc;
+ const char *command, *section;
+ char *tmp, **o_argv;
+ enum command_identify_by command_idby = CIB_NONE;
+
+ if (argc <= 1 && idby != II_NONE)
return 1;
- if (strcmp(type, "dev") == 0)
+
+ o_argc = argc;
+ o_argv = argv;
+
+ switch (idby) {
+ 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 II_NETDEV:
+ command_idby = CIB_NETDEV;
+ devidx = if_nametoindex(*argv);
+ if (devidx == 0)
+ devidx = -1;
+ argc--;
+ argv++;
+ break;
+ case II_WDEV:
+ command_idby = CIB_WDEV;
+ devidx = strtoll(*argv, &tmp, 0);
+ if (*tmp != '\0')
+ return 1;
+ argc--;
+ argv++;
+ default:
+ break;
+ }
+
+ if (devidx < 0)
+ return -errno;
+
+ section = *argv;
+ argc--;
+ argv++;
+
+ for_each_cmd(sectcmd) {
+ if (sectcmd->parent)
+ continue;
+ /* ok ... bit of a hack for the dupe 'info' section */
+ if (match && sectcmd->idby != command_idby)
+ continue;
+ 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;
+ if (cmd->parent != sectcmd)
+ continue;
+ /*
+ * ignore mismatch id by, but allow WDEV
+ * in place of NETDEV
+ */
+ if (cmd->idby != command_idby &&
+ !(cmd->idby == CIB_NETDEV &&
+ command_idby == CIB_WDEV))
+ 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)
+ return 1;
+ if (cmd->idby != command_idby &&
+ !(cmd->idby == CIB_NETDEV && command_idby == CIB_WDEV))
+ return 1;
+ if (!cmd->handler)
+ 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, idby);
+ }
+
+ msg = nlmsg_alloc();
+ if (!msg) {
+ fprintf(stderr, "failed to allocate netlink message\n");
return 2;
+ }
- return 0;
+ 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, state->nl80211_id, 0,
+ cmd->nl_msg_flags, cmd->cmd, 0);
+
+ switch (command_idby) {
+ case CIB_PHY:
+ NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, devidx);
+ break;
+ case CIB_NETDEV:
+ NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, devidx);
+ break;
+ case CIB_WDEV:
+ NLA_PUT_U64(msg, NL80211_ATTR_WDEV, devidx);
+ break;
+ default:
+ break;
+ }
+
+ err = cmd->handler(state, cb, msg, argc, argv, idby);
+ if (err)
+ goto out;
+
+ nl_socket_set_cb(state->nl_sock, s_cb);
+
+ err = nl_send_auto_complete(state->nl_sock, msg);
+ if (err < 0)
+ goto out;
+
+ err = 1;
+
+ nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
+ nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
+ nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
+
+ while (err > 0)
+ nl_recvmsgs(state->nl_sock, cb);
+ out:
+ nl_cb_put(cb);
+ out_free_msg:
+ nlmsg_free(msg);
+ return err;
+ nla_put_failure:
+ fprintf(stderr, "building message failed\n");
+ return 2;
+}
+
+int handle_cmd(struct nl80211_state *state, enum id_input idby,
+ int argc, char **argv)
+{
+ return __handle_cmd(state, idby, argc, argv, NULL);
}
int main(int argc, char **argv)
{
struct nl80211_state nlstate;
- int err = 0, pod;
- char *ifname, *phyname, *type;
-
- err = nl80211_init(&nlstate);
- if (err)
- return 1;
+ int err;
+ const struct cmd *cmd = NULL;
+ /* calculate command size including padding */
+ cmd_size = abs((long)&__section_set - (long)&__section_get);
/* strip off self */
argc--;
- argv++;
+ argv0 = *argv++;
- pod = get_phy_or_dev(&argc, &argv, &ifname);
- if (pod == 0) {
- err = 1;
- goto out;
+ if (argc > 0 && strcmp(*argv, "--debug") == 0) {
+ iw_debug = 1;
+ argc--;
+ argv++;
}
- if (pod == 1) {
- phyname = ifname;
- ifname = NULL;
+ if (argc > 0 && strcmp(*argv, "--version") == 0) {
+ version();
+ return 0;
}
- if (argc <= 0) {
- err = 1;
- goto out;
+ /* need to treat "help" command specially so it works w/o nl80211 */
+ if (argc == 0 || strcmp(*argv, "help") == 0) {
+ usage(argc - 1, argv + 1);
+ return 0;
}
- type = argv[0];
- argc--;
- argv++;
+ err = nl80211_init(&nlstate);
+ if (err)
+ return 1;
- if (strcmp(type, "interface") == 0)
- err = handle_interface(&nlstate, phyname, ifname, argc, argv);
- else {
- fprintf(stderr, "No such object type %s\n", type);
- err = 1;
+ if (strcmp(*argv, "dev") == 0 && argc > 1) {
+ 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 if (strcmp(*argv, "wdev") == 0 && argc > 1) {
+ argc--;
+ argv++;
+ err = __handle_cmd(&nlstate, II_WDEV, argc, argv, &cmd);
+ } 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);
}
- out:
+ 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);
return err;
projects / thirdparty / iw.git / blobdiff