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wiphy: Use dbus object path as network key in hash

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Modifying a bit how networks are stored inside the hashtable:
1 - instead of the network id, the network's object path is used
2 - network holds the pointer of the object path
3 - the hashtable does not free the key (network_free() will)

This permits to optimize on:
1 - one memory allocation used for 2 distinct things
2 - remove the need to re-compute the object path (and the id) when it's
needed, it can use dircetly the one stored in the network structure.
This commit is contained in:
Tomasz Bursztyka 2015-03-10 13:20:43 +02:00 committed by Denis Kenzior
parent 6d652fb743
commit 9c1780c0a1
1 changed files with 27 additions and 41 deletions
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68
src/wiphy.c
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@ -48,6 +48,7 @@ static struct l_genl_family *nl80211 = NULL;
static int scheduled_scan_interval = 60; /* in secs */
struct network {
char *object_path;
struct netdev *netdev;
uint8_t ssid[32];
uint8_t ssid_len;
@ -113,39 +114,22 @@ static const char *ssid_security_to_str(enum scan_ssid_security ssid_security)
return NULL;
}
static const char *iwd_network_get_id(const uint8_t *ssid,
unsigned int ssid_len,
static const char *iwd_network_get_path(struct netdev *netdev,
const uint8_t *ssid, size_t ssid_len,
enum scan_ssid_security ssid_security)
{
static char path[256];
unsigned int i, pos = 0;
unsigned int pos, i;
pos = snprintf(path, sizeof(path), "%s/", iwd_device_get_path(netdev));
for (i = 0; i < ssid_len && pos < sizeof(path); i++)
pos += snprintf(path + pos, sizeof(path) - pos, "%02x",
ssid[i]);
ssid[i]);
pos += snprintf(path + pos, sizeof(path) - pos, "_%s",
snprintf(path + pos, sizeof(path) - pos, "_%s",
ssid_security_to_str(ssid_security));
path[pos] = '\0';
return path;
}
static char *iwd_network_get_path(struct network *network)
{
static char path[256];
const char *id;
int pos;
pos = snprintf(path, sizeof(path), "%s/",
iwd_device_get_path(network->netdev));
id = iwd_network_get_id(network->ssid, network->ssid_len,
network->ssid_security);
strncpy(path + pos, id, sizeof(path) - pos);
return path;
}
@ -261,7 +245,7 @@ static struct l_dbus_message *network_connect(struct l_dbus *dbus,
if (!network->psk) {
network->agent_request =
agent_request_passphrase(
iwd_network_get_path(network),
network->object_path,
passphrase_callback,
network);
break;
@ -317,7 +301,7 @@ static void network_emit_added(struct network *network)
}
l_dbus_message_builder_append_basic(builder, 'o',
iwd_network_get_path(network));
network->object_path);
__iwd_network_append_properties(network, builder);
l_dbus_message_builder_finalize(builder);
@ -338,8 +322,7 @@ static void network_emit_removed(struct network *network)
if (!signal)
return;
l_dbus_message_set_arguments(signal, "o",
iwd_network_get_path(network));
l_dbus_message_set_arguments(signal, "o", network->object_path);
l_dbus_send(dbus, signal);
}
@ -362,10 +345,12 @@ static void network_free(void *data)
agent_request_cancel(network->agent_request);
dbus = dbus_get_bus();
l_dbus_unregister_interface(dbus, iwd_network_get_path(network),
l_dbus_unregister_interface(dbus, network->object_path,
IWD_NETWORK_INTERFACE);
network_emit_removed(network);
l_free(network->object_path);
l_queue_destroy(network->bss_list, NULL);
l_free(network->psk);
l_free(network);
@ -538,7 +523,7 @@ static void append_network_properties(const void *key, void *value,
l_dbus_message_builder_enter_dict(builder, "oa{sv}");
l_dbus_message_builder_append_basic(builder, 'o',
iwd_network_get_path(network));
network->object_path);
__iwd_network_append_properties(network, builder);
l_dbus_message_builder_leave_dict(builder);
}
@ -924,7 +909,7 @@ static void parse_bss(struct netdev *netdev, struct l_genl_attr *attr)
int ssid_len;
struct network *network;
enum scan_ssid_security ssid_security;
const char *id;
const char *path;
bss = l_new(struct bss, 1);
@ -1000,9 +985,9 @@ static void parse_bss(struct netdev *netdev, struct l_genl_attr *attr)
} else
ssid_security = scan_get_ssid_security(bss->capability, NULL);
id = iwd_network_get_id(ssid, ssid_len, ssid_security);
path = iwd_network_get_path(netdev, ssid, ssid_len, ssid_security);
network = l_hashmap_lookup(netdev->networks, id);
network = l_hashmap_lookup(netdev->networks, path);
if (!network) {
l_debug("Found new SSID \"%s\" security %s",
util_ssid_to_utf8(ssid_len, ssid),
@ -1014,10 +999,12 @@ static void parse_bss(struct netdev *netdev, struct l_genl_attr *attr)
network->ssid_len = ssid_len;
network->ssid_security = ssid_security;
network->bss_list = l_queue_new();
l_hashmap_insert(netdev->networks, id, network);
network->object_path = strdup(path);
l_hashmap_insert(netdev->networks,
network->object_path, network);
if (!l_dbus_register_interface(dbus_get_bus(),
iwd_network_get_path(network),
network->object_path,
IWD_NETWORK_INTERFACE,
setup_network_interface,
network, NULL))
@ -1113,7 +1100,6 @@ static void get_scan_callback(struct l_genl_msg *msg, void *user_data)
static void network_remove_if_lost(void *data)
{
struct network *network = data;
const char *id;
if (!l_queue_isempty(network->bss_list))
return;
@ -1121,10 +1107,7 @@ static void network_remove_if_lost(void *data)
l_debug("No remaining BSSs for SSID: %s -- Removing network",
util_ssid_to_utf8(network->ssid_len, network->ssid));
id = iwd_network_get_id(network->ssid, network->ssid_len,
network->ssid_security);
if (!l_hashmap_remove(network->netdev->networks, id))
if (!l_hashmap_remove(network->netdev->networks, network->object_path))
l_warn("Panic, trying to remove network that doesn't"
" exist in the networks hashmap");
@ -1295,7 +1278,10 @@ static void interface_dump_callback(struct l_genl_msg *msg, void *user_data)
netdev = l_new(struct netdev, 1);
netdev->bss_list = l_queue_new();
netdev->networks = l_hashmap_string_new();
netdev->networks = l_hashmap_new();
l_hashmap_set_hash_function(netdev->networks, l_str_hash);
l_hashmap_set_compare_function(netdev->networks,
(l_hashmap_compare_func_t) strcmp);
memcpy(netdev->name, ifname, sizeof(netdev->name));
memcpy(netdev->addr, ifaddr, sizeof(netdev->addr));
netdev->index = ifindex;