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nl80211: Use a global netlink command object

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Netlink sockets can be shared among all driver instances, saving
sockets and memory when using multiple interfaces in a single process.
This commit is contained in:
Ben Greear 2011-10-22 19:00:27 +03:00 committed by Jouni Malinen
parent 2a7b66f574
commit 276e2d671c
1 changed files with 23 additions and 20 deletions
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43
src/drivers/driver_nl80211.c
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@ -169,6 +169,8 @@ struct nl80211_global {
int if_add_ifindex; int if_add_ifindex;
struct netlink_data *netlink; struct netlink_data *netlink;
struct nl_cb *nl_cb; struct nl_cb *nl_cb;
struct nl80211_handles nl;
struct genl_family *nl80211;
}; };
static void nl80211_global_deinit(void *priv); static void nl80211_global_deinit(void *priv);
@ -204,8 +206,7 @@ struct wpa_driver_nl80211_data {
int scan_complete_events; int scan_complete_events;
struct nl80211_handles nl, nl_event, nl_preq; struct nl80211_handles nl_event, nl_preq;
struct genl_family *nl80211;
u8 auth_bssid[ETH_ALEN]; u8 auth_bssid[ETH_ALEN];
u8 bssid[ETH_ALEN]; u8 bssid[ETH_ALEN];
@ -383,7 +384,7 @@ static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
int (*valid_handler)(struct nl_msg *, void *), int (*valid_handler)(struct nl_msg *, void *),
void *valid_data) void *valid_data)
{ {
return send_and_recv(drv, drv->nl.handle, msg, valid_handler, return send_and_recv(drv, drv->global->nl.handle, msg, valid_handler,
valid_data); valid_data);
} }
@ -435,7 +436,8 @@ static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
msg = nlmsg_alloc(); msg = nlmsg_alloc();
if (!msg) if (!msg)
return -ENOMEM; return -ENOMEM;
genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl.handle, "nlctrl"), genlmsg_put(msg, 0, 0,
genl_ctrl_resolve(drv->global->nl.handle, "nlctrl"),
0, 0, CTRL_CMD_GETFAMILY, 0); 0, 0, CTRL_CMD_GETFAMILY, 0);
NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family); NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
@ -453,8 +455,8 @@ nla_put_failure:
static void * nl80211_cmd(struct wpa_driver_nl80211_data *drv, static void * nl80211_cmd(struct wpa_driver_nl80211_data *drv,
struct nl_msg *msg, int flags, uint8_t cmd) struct nl_msg *msg, int flags, uint8_t cmd)
{ {
return genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, return genlmsg_put(msg, 0, 0, genl_family_get_id(drv->global->nl80211),
flags, cmd, 0); 0, flags, cmd, 0);
} }
@ -2021,6 +2023,17 @@ static int wpa_driver_nl80211_init_nl_global(struct nl80211_global *global)
return -1; return -1;
} }
if (nl_create_handles(&global->nl, global->nl_cb, "nl"))
return -1;
global->nl80211 = genl_ctrl_search_by_name(global->nl.cache,
"nl80211");
if (global->nl80211 == NULL) {
wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
"found");
return -1;
}
return 0; return 0;
} }
@ -2032,19 +2045,9 @@ static int wpa_driver_nl80211_init_nl(struct wpa_driver_nl80211_data *drv)
/* Initialize generic netlink and nl80211 */ /* Initialize generic netlink and nl80211 */
if (nl_create_handles(&drv->nl, global->nl_cb, "nl"))
goto err2;
if (nl_create_handles(&drv->nl_event, global->nl_cb, "event")) if (nl_create_handles(&drv->nl_event, global->nl_cb, "event"))
goto err3; goto err3;
drv->nl80211 = genl_ctrl_search_by_name(drv->nl.cache, "nl80211");
if (drv->nl80211 == NULL) {
wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
"found");
goto err4;
}
ret = nl_get_multicast_id(drv, "nl80211", "scan"); ret = nl_get_multicast_id(drv, "nl80211", "scan");
if (ret >= 0) if (ret >= 0)
ret = nl_socket_add_membership(drv->nl_event.handle, ret); ret = nl_socket_add_membership(drv->nl_event.handle, ret);
@ -2084,8 +2087,6 @@ static int wpa_driver_nl80211_init_nl(struct wpa_driver_nl80211_data *drv)
err4: err4:
nl_destroy_handles(&drv->nl_event); nl_destroy_handles(&drv->nl_event);
err3: err3:
nl_destroy_handles(&drv->nl);
err2:
return -1; return -1;
} }
@ -2484,8 +2485,6 @@ static void wpa_driver_nl80211_deinit(void *priv)
close(drv->ioctl_sock); close(drv->ioctl_sock);
eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_event.handle)); eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_event.handle));
genl_family_put(drv->nl80211);
nl_destroy_handles(&drv->nl);
nl_destroy_handles(&drv->nl_event); nl_destroy_handles(&drv->nl_event);
os_free(drv->filter_ssids); os_free(drv->filter_ssids);
@ -7193,6 +7192,10 @@ static void nl80211_global_deinit(void *priv)
if (global->netlink) if (global->netlink)
netlink_deinit(global->netlink); netlink_deinit(global->netlink);
if (global->nl80211)
genl_family_put(global->nl80211);
nl_destroy_handles(&global->nl);
if (global->nl_cb) if (global->nl_cb)
nl_cb_put(global->nl_cb); nl_cb_put(global->nl_cb);