#include <fcntl.h>
#include <unistd.h>
#include <stdbool.h>
-
+#include <linux/netlink.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"
-#ifndef CONFIG_LIBNL20
-/* libnl 2.0 compatibility code */
-
+/* 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();
nl_handle_destroy(h);
}
-static inline int __genl_ctrl_alloc_cache(struct nl_sock *h, struct nl_cache **cache)
+static inline int nl_socket_set_buffer_size(struct nl_sock *sk,
+ int rxbuf, int txbuf)
{
- struct nl_cache *tmp = genl_ctrl_alloc_cache(h);
- if (!tmp)
- return -ENOMEM;
- *cache = tmp;
- return 0;
+ return nl_set_buffer_size(sk, rxbuf, txbuf);
}
-#define genl_ctrl_alloc_cache __genl_ctrl_alloc_cache
-#endif /* CONFIG_LIBNL20 */
+#endif /* CONFIG_LIBNL20 && CONFIG_LIBNL30 */
int iw_debug = 0;
goto out_handle_destroy;
}
- if (genl_ctrl_alloc_cache(state->nl_sock, &state->nl_cache)) {
- fprintf(stderr, "Failed to allocate generic netlink cache.\n");
- err = -ENOMEM;
- goto out_handle_destroy;
- }
+ nl_socket_set_buffer_size(state->nl_sock, 8192, 8192);
+
+ /* try to set NETLINK_EXT_ACK to 1, ignoring errors */
+ err = 1;
+ setsockopt(nl_socket_get_fd(state->nl_sock), SOL_NETLINK,
+ NETLINK_EXT_ACK, &err, sizeof(err));
- 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_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_socket_free(state->nl_sock);
}
-__COMMAND(NULL, NULL, "", NULL, 0, 0, 0, CIB_NONE, NULL, NULL);
-__COMMAND(NULL, NULL, "", NULL, 1, 0, 0, CIB_NONE, NULL, NULL);
-
static int cmd_size;
-static void __usage_cmd(struct cmd *cmd, char *indent, bool full)
+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;
- fprintf(stderr, "%s", indent);
+ printf("%s", indent);
switch (cmd->idby) {
case CIB_NONE:
break;
case CIB_PHY:
-
fprintf(stderr, "phy <phyname> ");
+
printf("phy <phyname> ");
break;
case CIB_NETDEV:
- fprintf(stderr, "dev <devname> ");
+ printf("dev <devname> ");
+ break;
+ case CIB_WDEV:
+ printf("wdev <idx> ");
break;
}
- if (cmd->section)
- fprintf(stderr, "%s ", cmd->section);
- fprintf(stderr, "%s", cmd->name);
- if (cmd->args)
- fprintf(stderr, " %s", cmd->args);
- fprintf(stderr, "\n");
+ 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;
if (strlen(indent))
indent = "\t\t";
else
- fprintf(stderr, "\n");
+ printf("\n");
/* print line by line */
start = cmd->help;
lend = strchr(start, '\n');
if (!lend)
lend = end;
- fprintf(stderr, "%s", indent);
- fprintf(stderr, "%.*s\n", (int)(lend - start), start);
+ printf("%s", indent);
+ printf("%.*s\n", (int)(lend - start), start);
start = lend + 1;
} while (end != lend);
- fprintf(stderr, "\n");
+ printf("\n");
}
static void usage_options(void)
{
- fprintf(stderr, "Options:\n");
- fprintf(stderr, "\t--debug\t\tenable netlink debugging\n");
+ printf("Options:\n");
+ printf("\t--debug\t\tenable netlink debugging\n");
}
static const char *argv0;
-static void usage(bool full)
+static void usage(int argc, char **argv)
{
- struct cmd *cmd;
+ 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];
- fprintf(stderr, "Usage:\t%s [options] command\n", argv0);
+ printf("Usage:\t%s [options] command\n", argv0);
usage_options();
- fprintf(stderr, "\t--version\tshow version (%s)\n", iw_version);
- fprintf(stderr, "Commands:\n");
- for (cmd = &__start___cmd; cmd < &__stop___cmd;
- cmd = (struct cmd *)((char *)cmd + cmd_size)) {
- if (!cmd->handler || cmd->hidden)
+ printf("\t--version\tshow version (%s)\n", iw_version);
+ printf("Commands:\n");
+ for_each_cmd(section) {
+ if (section->parent)
+ continue;
+
+ if (sect_filt && strcmp(section->name, sect_filt))
continue;
- __usage_cmd(cmd, "\t", full);
+
+ 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);
+ }
}
- fprintf(stderr, "\nYou can omit the 'phy' or 'dev' if "
+ 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");
+ "(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)
+ int argc, char **argv,
+ enum id_input id)
{
exit(3);
}
-TOPLEVEL(help, NULL, 0, 0, CIB_NONE, print_help,
- "Print usage for each command.");
+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(struct cmd *cmd)
+static void usage_cmd(const struct cmd *cmd)
{
- fprintf(stderr, "Usage:\t%s [options] ", argv0);
+ printf("Usage:\t%s [options] ", argv0);
__usage_cmd(cmd, "", true);
usage_options();
}
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);
}
static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
void *arg)
{
+ struct nlmsghdr *nlh = (struct nlmsghdr *)err - 1;
+ int len = nlh->nlmsg_len;
+ struct nlattr *attrs;
+ struct nlattr *tb[NLMSGERR_ATTR_MAX + 1];
int *ret = arg;
+ int ack_len = sizeof(*nlh) + sizeof(int) + sizeof(*nlh);
+
*ret = err->error;
+
+ if (!(nlh->nlmsg_flags & NLM_F_ACK_TLVS))
+ return NL_STOP;
+
+ if (!(nlh->nlmsg_flags & NLM_F_CAPPED))
+ ack_len += err->msg.nlmsg_len - sizeof(*nlh);
+
+ if (len <= ack_len)
+ return NL_STOP;
+
+ attrs = (void *)((unsigned char *)nlh + ack_len);
+ len -= ack_len;
+
+ nla_parse(tb, NLMSGERR_ATTR_MAX, attrs, len, NULL);
+ if (tb[NLMSGERR_ATTR_MSG]) {
+ len = strnlen((char *)nla_data(tb[NLMSGERR_ATTR_MSG]),
+ nla_len(tb[NLMSGERR_ATTR_MSG]));
+ fprintf(stderr, "kernel reports: %*s\n", len,
+ (char *)nla_data(tb[NLMSGERR_ATTR_MSG]));
+ }
+
return NL_STOP;
}
return NL_STOP;
}
+static int (*registered_handler)(struct nl_msg *, void *);
+static void *registered_handler_data;
+
+void register_handler(int (*handler)(struct nl_msg *, void *), void *data)
+{
+ registered_handler = handler;
+ registered_handler_data = data;
+}
+
+int valid_handler(struct nl_msg *msg, void *arg)
+{
+ if (registered_handler)
+ return registered_handler(msg, registered_handler_data);
+
+ return NL_OK;
+}
+
static int __handle_cmd(struct nl80211_state *state, enum id_input idby,
- int argc, char **argv, struct cmd **cmdout)
+ int argc, char **argv, const struct cmd **cmdout)
{
- struct cmd *cmd, *match = NULL;
+ const struct cmd *cmd, *match = NULL, *sectcmd;
struct nl_cb *cb;
+ struct nl_cb *s_cb;
struct nl_msg *msg;
- int devidx = 0;
+ signed long long devidx = 0;
int err, o_argc;
const char *command, *section;
char *tmp, **o_argv;
o_argc = argc;
o_argv = argv;
- state->ifname = NULL;
-
switch (idby) {
case II_PHY_IDX:
command_idby = CIB_PHY;
break;
case II_NETDEV:
command_idby = CIB_NETDEV;
- state->ifname = *argv;
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 = command = *argv;
+ 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 != command_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) {
- if (match)
- break;
- return 1;
- }
- command = *argv;
- argc--;
- argv++;
- }
- } else if (section != command)
- continue;
- if (strcmp(cmd->name, command))
- continue;
- if (argc && !cmd->args)
- 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;
+ }
- match = cmd;
+ if (match) {
+ argc--;
+ argv++;
+ }
}
- cmd = match;
+ 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)
- 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);
+ return cmd->handler(state, NULL, argc, argv, idby);
}
msg = nlmsg_alloc();
}
cb = nl_cb_alloc(iw_debug ? NL_CB_DEBUG : NL_CB_DEFAULT);
- if (!cb) {
+ 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;
+ goto out;
}
- 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 (command_idby) {
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);
+ err = cmd->handler(state, 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;
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);
+ nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, valid_handler, NULL);
while (err > 0)
nl_recvmsgs(state->nl_sock, cb);
out:
nl_cb_put(cb);
- out_free_msg:
+ nl_cb_put(s_cb);
nlmsg_free(msg);
return err;
nla_put_failure:
{
struct nl80211_state nlstate;
int err;
- struct cmd *cmd = NULL;
+ const struct cmd *cmd = NULL;
/* calculate command size including padding */
- cmd_size = abs((long)&__cmd_NULL_NULL_1_CIB_NONE_0
- - (long)&__cmd_NULL_NULL_0_CIB_NONE_0);
+ cmd_size = labs((long)&__section_set - (long)&__section_get);
/* strip off self */
argc--;
argv0 = *argv++;
/* need to treat "help" command specially so it works w/o nl80211 */
if (argc == 0 || strcmp(*argv, "help") == 0) {
- usage(argc != 0);
+ usage(argc - 1, argv + 1);
return 0;
}
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;
+ enum id_input idby;
detect:
+ idby = II_NONE;
if ((idx = if_nametoindex(argv[0])) != 0)
idby = II_NETDEV;
else if ((idx = phy_lookup(argv[0])) >= 0)
err = __handle_cmd(&nlstate, idby, argc, argv, &cmd);
}
- if (err == 1) {
+ if (err == HANDLER_RET_USAGE) {
if (cmd)
usage_cmd(cmd);
else
- usage(false);
+ usage(0, NULL);
+ } else if (err == HANDLER_RET_DONE) {
+ err = 0;
} else if (err < 0)
fprintf(stderr, "command failed: %s (%d)\n", strerror(-err), err);
projects / thirdparty / iw.git / blobdiff