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Document AP mode startup functions

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This provides some more details on how interfaces and BSSes are
initialized during hostapd startup.

Signed-hostap: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2013-11-03 21:16:33 +02:00
parent 1b3926ef73
commit 0dfd2c61a5
2 changed files with 45 additions and 1 deletions
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21
hostapd/main.c
View File

@ -147,6 +147,9 @@ static void hostapd_logger_cb(void *ctx, const u8 *addr, unsigned int module,
#endif /* CONFIG_NO_HOSTAPD_LOGGER */
/**
* hostapd_driver_init - Preparate driver interface
*/
static int hostapd_driver_init(struct hostapd_iface *iface)
{
struct wpa_init_params params;
@ -226,6 +229,13 @@ static int hostapd_driver_init(struct hostapd_iface *iface)
}
/**
* hostapd_interface_init - Read configuration file and init BSS data
*
* This function is used to parse configuration file for a full interface (one
* or more BSSes sharing the same radio) and allocate memory for the BSS
* interfaces. No actiual driver operations are started.
*/
static struct hostapd_iface *
hostapd_interface_init(struct hapd_interfaces *interfaces,
const char *config_fname, int debug)
@ -628,7 +638,7 @@ int main(int argc, char *argv[])
return -1;
}
/* Initialize interfaces */
/* Allocate and parse configuration for full interface files */
for (i = 0; i < interfaces.count; i++) {
interfaces.iface[i] = hostapd_interface_init(&interfaces,
argv[optind + i],
@ -639,6 +649,7 @@ int main(int argc, char *argv[])
}
}
/* Allocate and parse configuration for per-BSS files */
for (i = 0; i < num_bss_configs; i++) {
struct hostapd_iface *iface;
char *fname;
@ -674,6 +685,14 @@ int main(int argc, char *argv[])
}
}
/*
* Enable configured interfaces. Depending on channel configuration,
* this may complete full initialization before returning or use a
* callback mechanism to complete setup in case of operations like HT
* co-ex scans, ACS, or DFS are needed to determine channel parameters.
* In such case, the interface will be enabled from eloop context within
* hostapd_global_run().
*/
for (i = 0; i < interfaces.count; i++) {
if (hostapd_driver_init(interfaces.iface[i]) ||
hostapd_setup_interface(interfaces.iface[i]))

25
src/ap/hostapd.c
View File

@ -1065,6 +1065,14 @@ static int setup_interface2(struct hostapd_iface *iface)
}
/**
* hostapd_setup_interface_complete - Complete interface setup
*
* This function is called when previous steps in the interface setup has been
* completed. This can also start operations, e.g., DFS, that will require
* additional processing before interface is ready to be enabled. Such
* operations will call this function from eloop callbacks when finished.
*/
int hostapd_setup_interface_complete(struct hostapd_iface *iface, int err)
{
struct hostapd_data *hapd = iface->bss[0];
@ -1193,6 +1201,12 @@ int hostapd_setup_interface_complete(struct hostapd_iface *iface, int err)
* and sets driver parameters based on the configuration.
* Flushes old stations, sets the channel, encryption,
* beacons, and WDS links based on the configuration.
*
* If interface setup requires more time, e.g., to perform HT co-ex scans, ACS,
* or DFS operations, this function returns 0 before such operations have been
* completed. The pending operations are registered into eloop and will be
* completed from eloop callbacks. Those callbacks end up calling
* hostapd_setup_interface_complete() once setup has been completed.
*/
int hostapd_setup_interface(struct hostapd_iface *iface)
{
@ -1350,6 +1364,17 @@ static int ifname_in_use(struct hapd_interfaces *interfaces, const char *ifname)
}
/**
* hostapd_interface_init_bss - Read configuration file and init BSS data
*
* This function is used to parse configuration file for a BSS. This BSS is
* added to an existing interface sharing the same radio (if any) or a new
* interface is created if this is the first interface on a radio. This
* allocate memory for the BSS. No actual driver operations are started.
*
* This is similar to hostapd_interface_init(), but for a case where the
* configuration is used to add a single BSS instead of all BSSes for a radio.
*/
struct hostapd_iface *
hostapd_interface_init_bss(struct hapd_interfaces *interfaces, const char *phy,
const char *config_fname, int debug)