ipacm/src/IPACM_IfaceManager.cpp

/* 
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/*!
	@file
	IPACM_IfaceManager.cpp

	@brief
	This file implements the IPAM iface_manager functionality.

	@Author
	Skylar Chang

*/
#include <string.h>
#include <sys/ioctl.h>

#include <IPACM_IfaceManager.h>
#include <IPACM_EvtDispatcher.h>
#include <IPACM_Defs.h>
#include <IPACM_Wlan.h>
#include <IPACM_Lan.h>
#include <IPACM_Wan.h>
#include <IPACM_Iface.h>
#include <IPACM_Log.h>

iface_instances *IPACM_IfaceManager::head = NULL;

IPACM_IfaceManager::IPACM_IfaceManager() 
{
	IPACM_EvtDispatcher::registr(IPA_LINK_UP_EVENT, this);         
	IPACM_EvtDispatcher::registr(IPA_WLAN_AP_LINK_UP_EVENT, this);  // register for wlan AP-iface
	IPACM_EvtDispatcher::registr(IPA_WLAN_STA_LINK_UP_EVENT, this); // register for wlan STA-iface
	return;
}

void IPACM_IfaceManager::event_callback(ipa_cm_event_id event, void *param)
{
  int ipa_interface_index;
	ipacm_event_data_fid *evt_data = (ipacm_event_data_fid *)param;
	switch(event)
	{

	case IPA_LINK_UP_EVENT:
		IPACMDBG("link up %d: \n", evt_data->if_index);
		create_iface_instance(evt_data->if_index, false);
		break;

	case IPA_WLAN_AP_LINK_UP_EVENT:
	    ipa_interface_index = IPACM_Iface::iface_ipa_index_query(evt_data->if_index);
		/* change iface category from unknown to WLAN_IF */
		if(IPACM_Iface::ipacmcfg->iface_table[ipa_interface_index].if_cat == UNKNOWN_IF)
		{  
		  IPACM_Iface::ipacmcfg->iface_table[ipa_interface_index].if_cat=WLAN_IF; 
		  IPACMDBG("WLAN AP (%s) link up, iface: %d: \n", IPACM_Iface::ipacmcfg->iface_table[ipa_interface_index].iface_name,evt_data->if_index);		
		  create_iface_instance(evt_data->if_index, false);
		}
		else
		{
		  IPACMDBG("iface %s already up and act as %d mode: \n",IPACM_Iface::ipacmcfg->iface_table[ipa_interface_index].iface_name,IPACM_Iface::ipacmcfg->iface_table[ipa_interface_index].if_cat);		
		}
		break;

	case IPA_WLAN_STA_LINK_UP_EVENT:
	    ipa_interface_index = IPACM_Iface::iface_ipa_index_query(evt_data->if_index);
		/* change iface category from unknown to WAN_IF */
		if(IPACM_Iface::ipacmcfg->iface_table[ipa_interface_index].if_cat==UNKNOWN_IF)
		{  
		  IPACM_Iface::ipacmcfg->iface_table[ipa_interface_index].if_cat=WAN_IF; 
		  IPACMDBG("WLAN STA (%s) link up, iface: %d: \n", IPACM_Iface::ipacmcfg->iface_table[ipa_interface_index].iface_name,evt_data->if_index);		
		  create_iface_instance(evt_data->if_index, true);
		}
		else
		{
		  IPACMDBG("iface %s already up and act as %d mode: \n",IPACM_Iface::ipacmcfg->iface_table[ipa_interface_index].iface_name,IPACM_Iface::ipacmcfg->iface_table[ipa_interface_index].if_cat);		
		}
		break;
		
	default:
		break;
	}
	return;
}

int IPACM_IfaceManager::create_iface_instance(int if_index, bool is_sta_mode)
{
	int ipa_interface_index;
	ipa_interface_index = IPACM_Iface::iface_ipa_index_query(if_index);

	if(ipa_interface_index == INVALID_IFACE)
	{
			IPACMDBG("Unhandled interface received, fid: %d\n",if_index);
			return IPACM_SUCCESS;
	}
	
	/* check if duplicate instance*/
	if(SearchInstance(ipa_interface_index) == IPA_INSTANCE_NOT_FOUND)
	{
		/* IPA_INSTANCE_NOT_FOUND */
		switch(IPACM_Iface::ipacmcfg->iface_table[ipa_interface_index].if_cat)
		{

		case LAN_IF:
			{
				IPACMDBG("Creating Lan interface\n");
				IPACM_Lan *lan = new IPACM_Lan(ipa_interface_index);
				IPACM_EvtDispatcher::registr(IPA_ADDR_ADD_EVENT, lan);
				//IPACM_EvtDispatcher::registr(IPA_ROUTE_ADD_EVENT, lan);
				//IPACM_EvtDispatcher::registr(IPA_ROUTE_DEL_EVENT, lan);
				IPACM_EvtDispatcher::registr(IPA_NEIGH_CLIENT_IP_ADDR_ADD_EVENT, lan);
				//IPACM_EvtDispatcher::registr(IPA_NEIGH_CLIENT_IP_ADDR_DEL_EVENT, lan);
				IPACM_EvtDispatcher::registr(IPA_SW_ROUTING_ENABLE, lan);
				IPACM_EvtDispatcher::registr(IPA_SW_ROUTING_DISABLE, lan);
				IPACM_EvtDispatcher::registr(IPA_HANDLE_WAN_UP, lan);
				IPACM_EvtDispatcher::registr(IPA_HANDLE_WAN_UP_V6, lan);
				IPACM_EvtDispatcher::registr(IPA_HANDLE_WAN_DOWN, lan);
				IPACM_EvtDispatcher::registr(IPA_HANDLE_WAN_DOWN_V6, lan);
				IPACM_EvtDispatcher::registr(IPA_LINK_DOWN_EVENT, lan);
				IPACMDBG("ipa_LAN (%s):ipa_index (%d) instance open/registr ok\n", lan->dev_name, lan->ipa_if_num);
				registr(ipa_interface_index, lan);
				/* solve the new_addr comes earlier issue */
                                IPACM_Iface::iface_addr_query(if_index);
			}
			break;

		case WLAN_IF:
			{
				IPACMDBG("Creating WLan interface\n");
				IPACM_Wlan *wl = new IPACM_Wlan(ipa_interface_index);
				IPACM_EvtDispatcher::registr(IPA_ADDR_ADD_EVENT, wl);
				IPACM_EvtDispatcher::registr(IPA_ROUTE_DEL_EVENT, wl);
				IPACM_EvtDispatcher::registr(IPA_WLAN_CLIENT_ADD_EVENT, wl);
				IPACM_EvtDispatcher::registr(IPA_WLAN_CLIENT_ADD_EVENT_EX, wl);
				IPACM_EvtDispatcher::registr(IPA_WLAN_CLIENT_DEL_EVENT, wl);
				IPACM_EvtDispatcher::registr(IPA_WLAN_CLIENT_POWER_SAVE_EVENT, wl);
				IPACM_EvtDispatcher::registr(IPA_WLAN_CLIENT_RECOVER_EVENT, wl);
				IPACM_EvtDispatcher::registr(IPA_NEIGH_CLIENT_IP_ADDR_ADD_EVENT, wl);
				IPACM_EvtDispatcher::registr(IPA_SW_ROUTING_ENABLE, wl);
				IPACM_EvtDispatcher::registr(IPA_SW_ROUTING_DISABLE, wl);
				IPACM_EvtDispatcher::registr(IPA_HANDLE_WAN_UP, wl);
				IPACM_EvtDispatcher::registr(IPA_HANDLE_WAN_UP_V6, wl);
				IPACM_EvtDispatcher::registr(IPA_HANDLE_WAN_DOWN, wl);
				IPACM_EvtDispatcher::registr(IPA_HANDLE_WAN_DOWN_V6, wl);
				IPACM_EvtDispatcher::registr(IPA_LINK_DOWN_EVENT, wl);
				IPACMDBG("ipa_WLAN (%s):ipa_index (%d) instance open/registr ok\n", wl->dev_name, wl->ipa_if_num);
				registr(ipa_interface_index, wl);
				/* solve the new_addr comes earlier issue */
	                        IPACM_Iface::iface_addr_query(if_index);
			}
			break;

		case WAN_IF:
			{
				IPACMDBG("Creating Wan interface\n");
				IPACM_Wan *w = new IPACM_Wan(ipa_interface_index, is_sta_mode);
				IPACM_EvtDispatcher::registr(IPA_ADDR_ADD_EVENT, w);
				IPACM_EvtDispatcher::registr(IPA_ROUTE_ADD_EVENT, w);
				IPACM_EvtDispatcher::registr(IPA_ROUTE_DEL_EVENT, w);
				IPACM_EvtDispatcher::registr(IPA_FIREWALL_CHANGE_EVENT, w);
				IPACM_EvtDispatcher::registr(IPA_NEIGH_CLIENT_IP_ADDR_ADD_EVENT, w);
				IPACM_EvtDispatcher::registr(IPA_SW_ROUTING_ENABLE, w);
				IPACM_EvtDispatcher::registr(IPA_SW_ROUTING_DISABLE, w);
				IPACM_EvtDispatcher::registr(IPA_LINK_DOWN_EVENT, w);
				IPACMDBG("ipa_WAN (%s):ipa_index (%d) instance open/registr ok\n", w->dev_name, w->ipa_if_num);
				registr(ipa_interface_index, w);
				/* solve the new_addr comes earlier issue */
                                IPACM_Iface::iface_addr_query(if_index);
			}
			break;

		default:
			IPACMDBG("Unhandled interface category received iface name: %s, category: %d\n",
			            IPACM_Iface::ipacmcfg->iface_table[ipa_interface_index].iface_name,
						       IPACM_Iface::ipacmcfg->iface_table[ipa_interface_index].if_cat);
			return IPACM_SUCCESS;
		}
	}
	return IPACM_SUCCESS;
}


int IPACM_IfaceManager::registr(int ipa_if_index, IPACM_Listener *obj)
{
	iface_instances *tmp = head,*nw;

	nw = (iface_instances *)malloc(sizeof(iface_instances));
	if(nw != NULL)
	{
		nw->ipa_if_index = ipa_if_index;
		nw->obj = obj;
		nw->next = NULL;
	}
	else
	{
		return IPACM_FAILURE;
	}

	if(head == NULL)
	{
		head = nw;
	}
	else
	{
		while(tmp->next)
		{
			tmp = tmp->next;
		}
		tmp->next = nw;
	}
	return IPACM_SUCCESS;
}

int IPACM_IfaceManager::deregistr(IPACM_Listener *param)
{
	iface_instances *tmp = head,*tmp1,*prev = head;

	while(tmp != NULL)
	{
		if(tmp->obj == param)
		{
			tmp1 = tmp;
			if(tmp == head)
			{
				head = head->next;
			}
			else if(tmp->next == NULL)
			{
				prev->next = NULL;
			}
			else
			{
				prev->next = tmp->next;
			}

			tmp = tmp->next;
			free(tmp1);
		}
		else
		{
			prev = tmp;
			tmp = tmp->next;
		}
	}
	return IPACM_SUCCESS;
}


int IPACM_IfaceManager::SearchInstance(int ipa_if_index)
{

	iface_instances *tmp = head;

	while(tmp != NULL)
	{
		if(ipa_if_index == tmp->ipa_if_index)
		{
			IPACMDBG("Find existed iface-instance name: %s\n",
							 IPACM_Iface::ipacmcfg->iface_table[ipa_if_index].iface_name);
			return IPA_INSTANCE_FOUND;
		}
		tmp = tmp->next;
	}

	IPACMDBG("No existed iface-instance name: %s,\n",
					 IPACM_Iface::ipacmcfg->iface_table[ipa_if_index].iface_name);

	return IPA_INSTANCE_NOT_FOUND;
}