ppsspp/Core/HLE/proAdhoc.cpp

// Copyright (c) 2013- PPSSPP Project.

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, version 2.0 or later versions.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License 2.0 for more details.

// A copy of the GPL 2.0 should have been included with the program.
// If not, see http://www.gnu.org/licenses/

// Official git repository and contact information can be found at
// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.


// proAdhoc

// This is a direct port of Coldbird's code from http://code.google.com/p/aemu/
// All credit goes to him!

#if !defined(_WIN32)
#include <unistd.h>
#endif

#include <cstring>
#include "util/text/parsers.h"
#include "thread/threadutil.h"
#include "Core/Core.h"
#include "Core/Host.h"
#include "Core/HLE/sceKernelInterrupt.h"
#include "Core/HLE/sceKernelThread.h"
#include "Core/HLE/sceKernelMemory.h"
#include "Core/Instance.h"
#include "proAdhoc.h" 
#include "i18n/i18n.h"

uint16_t portOffset = g_Config.iPortOffset;
uint32_t fakePoolSize                 = 0;
SceNetAdhocMatchingContext * contexts = NULL;
int one                               = 1;
bool friendFinderRunning              = false;
SceNetAdhocctlPeerInfo * friends      = NULL;
SceNetAdhocctlScanInfo * networks     = NULL;
SceNetAdhocctlScanInfo * newnetworks  = NULL;
int threadStatus                      = ADHOCCTL_STATE_DISCONNECTED;

int actionAfterAdhocMipsCall;
int actionAfterMatchingMipsCall;

// Broadcast MAC
uint8_t broadcastMAC[ETHER_ADDR_LEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };

int metasocket;
SceNetAdhocctlParameter parameter;
SceNetAdhocctlAdhocId product_code;
std::thread friendFinderThread;
std::recursive_mutex peerlock;
SceNetAdhocPdpStat * pdp[255];
SceNetAdhocPtpStat * ptp[255];
std::vector<std::string> chatLog;
std::string name = "";
std::string incoming = "";
std::string message = "";
bool chatScreenVisible = false;
bool updateChatScreen = false;
int newChat = 0;
bool isLocalServer = false;
sockaddr localIP; // This might serves the same purpose with existing "localip" above, but since this is copied from my old code so here it is (too lazy to rewrite the code)

bool isLocalMAC(const SceNetEtherAddr * addr) {
	SceNetEtherAddr saddr;
	getLocalMac(&saddr);

	// Compare MAC Addresses
	int match = memcmp((const void *)addr, (const void *)&saddr, ETHER_ADDR_LEN);

	// Return Result
	return (match == 0);
}

bool isPDPPortInUse(uint16_t port) {
	// Iterate Elements
	for (int i = 0; i < 255; i++) if (pdp[i] != NULL && pdp[i]->lport == port) return true;

	// Unused Port
	return false;
}

bool isPTPPortInUse(uint16_t port) {
	// Iterate Sockets
	for(int i = 0; i < 255; i++) if(ptp[i] != NULL && ptp[i]->lport == port) return true;
	
	// Unused Port
	return false;
}

char* mac2str(SceNetEtherAddr* mac) {
#if defined(_WIN32)
	static __declspec(thread) char str[18] = ":::::";
#else
	static __thread char str[18] = ":::::";
#endif
	if (mac == NULL) return str;
	snprintf(str, sizeof(str), "%02x:%02x:%02x:%02x:%02x:%02x", mac->data[0], mac->data[1], mac->data[2], mac->data[3], mac->data[4], mac->data[5]);

	return str;
}

char* mac2str(SceNetEtherAddr* mac, char* str, size_t size) {
	if (mac == NULL || str == NULL || size < 18) return NULL;

	snprintf(str, size, "%02x:%02x:%02x:%02x:%02x:%02x", mac->data[0], mac->data[1], mac->data[2], mac->data[3], mac->data[4], mac->data[5]);

	return str;
}

SceNetAdhocMatchingMemberInternal* addMember(SceNetAdhocMatchingContext * context, SceNetEtherAddr * mac) {
	if (context == NULL || mac == NULL) return NULL;
	
	SceNetAdhocMatchingMemberInternal * peer = findPeer(context, mac);
	// Already existed
	if (peer != NULL) {
		char tmpmac[18];
		WARN_LOG(SCENET, "Member Peer Already Existed! Updating [%s]", mac2str(mac, tmpmac));
		peer->lastping = CoreTiming::GetGlobalTimeUsScaled();
	}
	// Member is not added yet
	else {
		peer = (SceNetAdhocMatchingMemberInternal *)malloc(sizeof(SceNetAdhocMatchingMemberInternal));
		if (peer != NULL) {
			memset(peer, 0, sizeof(SceNetAdhocMatchingMemberInternal));
			peer->mac = *mac;
			peer->lastping = CoreTiming::GetGlobalTimeUsScaled();
			peer->next = context->peerlist;
			context->peerlist = peer;
		}
	}
	return peer;
}

void addFriend(SceNetAdhocctlConnectPacketS2C * packet) {
	if (packet == NULL) return;

	// Multithreading Lock
	std::lock_guard<std::recursive_mutex> guard(peerlock);

	SceNetAdhocctlPeerInfo * peer = findFriend(&packet->mac);
	// Already existed
	if (peer != NULL) {
		char tmpmac[18];
		WARN_LOG(SCENET, "Friend Peer Already Existed! Updating [%s][%s][%s]", packet->name.data, mac2str(&packet->mac, tmpmac), inet_ntoa(*(in_addr*)&packet->ip));
		peer->nickname = packet->name;
		peer->mac_addr = packet->mac;
		peer->ip_addr = packet->ip;
		// Update TimeStamp
		peer->last_recv = CoreTiming::GetGlobalTimeUsScaled();
	}
	else {
		// Allocate Structure
		peer = (SceNetAdhocctlPeerInfo *)malloc(sizeof(SceNetAdhocctlPeerInfo));
		// Allocated Structure
		if (peer != NULL) {
			// Clear Memory
			memset(peer, 0, sizeof(SceNetAdhocctlPeerInfo));

			// Save Nickname
			peer->nickname = packet->name;

			// Save MAC Address
			peer->mac_addr = packet->mac;

			// Save IP Address
			peer->ip_addr = packet->ip;

			// TimeStamp
			peer->last_recv = CoreTiming::GetGlobalTimeUsScaled();

			// Link to existing Peers
			peer->next = friends;

			// Link into Peerlist
			friends = peer;
		}
	}
}

SceNetAdhocctlPeerInfo * findFriend(SceNetEtherAddr * MAC) {
	if (MAC == NULL) return NULL;

	// Friends Reference
	SceNetAdhocctlPeerInfo * peer = friends;

	// Iterate Friends
	for (; peer != NULL; peer = peer->next) {
		if (IsMatch(peer->mac_addr, *MAC)) break;
	}

	// Return found friend
	return peer;
}

void changeBlockingMode(int fd, int nonblocking) {
	unsigned long on = 1;
	unsigned long off = 0;
#ifdef _WIN32
	if (nonblocking){
		// Change to Non-Blocking Mode
		ioctlsocket(fd, FIONBIO, &on);
	}
	else {
		// Change to Blocking Mode
		ioctlsocket(fd, FIONBIO, &off);
	}
#else
	if(nonblocking == 1) fcntl(fd, F_SETFL, O_NONBLOCK);
	else {
		// Get Flags
		int flags = fcntl(fd, F_GETFL);
		// Remove Non-Blocking Flag
		fcntl(fd, F_SETFL, flags & ~O_NONBLOCK);
	}
#endif
}

int countAvailableNetworks() {
	// Network Count
	int count = 0;

	// Group Reference
	SceNetAdhocctlScanInfo * group = networks;

	// Count Groups
	for (; group != NULL; group = group->next) count++;

	// Return Network Count
	return count;
}

SceNetAdhocctlScanInfo * findGroup(SceNetEtherAddr * MAC) {
	if (MAC == NULL) return NULL;

	// Groups Reference
	SceNetAdhocctlScanInfo * group = networks;

	// Iterate Groups
	for (; group != NULL; group = group->next) {
		if (IsMatch(group->bssid.mac_addr, *MAC)) break;
	}

	// Return found group
	return group;
}

void freeGroupsRecursive(SceNetAdhocctlScanInfo * node) {
	// End of List
	if (node == NULL) return;

	// Increase Recursion Depth
	freeGroupsRecursive(node->next);

	// Free Memory
	free(node);
	node = NULL;
}

void deleteAllPDP() {
	// Iterate Element
	for (int i = 0; i < 255; i++) {
		// Active Socket
		if (pdp[i] != NULL) {
			// Close Socket
			closesocket(pdp[i]->id);

			// Free Memory
			free(pdp[i]);

			// Delete Reference
			pdp[i] = NULL;
		}
	}
}

void deleteAllPTP() {
	// Iterate Element
	for (int i = 0; i < 255; i++) {
		// Active Socket
		if (ptp[i] != NULL) {
			// Close Socket
			closesocket(ptp[i]->id);

			// Free Memory
			free(ptp[i]);

			// Delete Reference
			ptp[i] = NULL;
		}
	}
}

void deleteFriendByIP(uint32_t ip) {
	// Previous Peer Reference
	SceNetAdhocctlPeerInfo * prev = NULL;

	// Peer Pointer
	SceNetAdhocctlPeerInfo * peer = friends;

	// Iterate Peers
	for (; peer != NULL; peer = peer->next) {
		// Found Peer
		if (peer->ip_addr == ip) {
			
			// Multithreading Lock
			peerlock.lock();

			// Unlink Left (Beginning)
			/*if (prev == NULL) friends = peer->next;

			// Unlink Left (Other)
			else prev->next = peer->next;
			*/

			char tmpmac[18];
			INFO_LOG(SCENET, "Removing Friend Peer %s [%s]", mac2str(&peer->mac_addr, tmpmac), inet_ntoa(*(in_addr*)&peer->ip_addr));

			// Free Memory
			//free(peer);
			//peer = NULL;
			// Instead of removing it from the list we'll make it timed out since most Matching games are moving group and may still need the peer data thus not recognizing it as Unknown peer
			peer->last_recv = 0; //CoreTiming::GetGlobalTimeUsScaled();

			// Multithreading Unlock
			peerlock.unlock();

			// Stop Search
			break;
		}

		// Set Previous Reference
		prev = peer;
	}
}

int findFreeMatchingID() {
	// Minimum Matching ID
	int min = 1;

	// Maximum Matching ID
	int max = 0;

	// Find highest Matching ID
	SceNetAdhocMatchingContext * item = contexts; 
	for (; item != NULL; item = item->next) {
		// New Maximum
		if (max < item->id) max = item->id;
	}

	// Find unoccupied ID
	int i = min; 
	for (; i < max; i++) {
		// Found unoccupied ID
		if (findMatchingContext(i) == NULL) return i;
	}

	// Append at virtual end
	return max + 1;
}

SceNetAdhocMatchingContext * findMatchingContext(int id) {
	// Iterate Matching Context List
	SceNetAdhocMatchingContext * item = contexts; 
	for (; item != NULL; item = item->next) { // Found Matching ID
		if (item->id == id) return item;
	}

	// Context not found
	return NULL;
}

/**
* Find Outgoing Request Target Peer
* @param context Matching Context Pointer
* @return Internal Peer Reference or... NULL
*/
SceNetAdhocMatchingMemberInternal * findOutgoingRequest(SceNetAdhocMatchingContext * context)
{
	// Iterate Peer List for Matching Target
	SceNetAdhocMatchingMemberInternal * peer = context->peerlist; 
	for (; peer != NULL; peer = peer->next)
	{
		// Found Peer in List
		if (peer->state == PSP_ADHOC_MATCHING_PEER_OUTGOING_REQUEST) return peer;
	}

	// Peer not found
	return NULL;
}

/**
* Remove unneeded Peer Data after being accepted to a match
* @param context Matching Context Pointer
*/
void postAcceptCleanPeerList(SceNetAdhocMatchingContext * context)
{
	int delcount = 0;
	int peercount = 0;
	// Acquire Peer Lock
	peerlock.lock();

	// Iterate Peer List
	SceNetAdhocMatchingMemberInternal * peer = context->peerlist; 
	while (peer != NULL)
	{
		// Save next Peer just in case we have to delete this one
		SceNetAdhocMatchingMemberInternal * next = peer->next;

		// Unneeded Peer
		if (peer->state != PSP_ADHOC_MATCHING_PEER_CHILD && peer->state != PSP_ADHOC_MATCHING_PEER_P2P && peer->state != PSP_ADHOC_MATCHING_PEER_PARENT) {
			deletePeer(context, peer);
			delcount++;
		}

		// Move to Next Peer
		peer = next;
		peercount++;
	}

	// Free Peer Lock
	peerlock.unlock();

	INFO_LOG(SCENET, "Removing Unneeded Peer (%i/%i)", delcount, peercount);
}

/**
* Add Sibling-Data that was sent with Accept-Datagram
* @param context Matching Context Pointer
* @param siblingcount Number of Siblings
* @param siblings Sibling MAC Array
*/
void postAcceptAddSiblings(SceNetAdhocMatchingContext * context, int siblingcount, SceNetEtherAddr * siblings)
{
	// Cast Sibling MAC Array to uint8_t
	// PSP CPU has a problem with non-4-byte aligned Pointer Access.
	// As the buffer of "siblings" isn't properly aligned I don't want to risk a crash.
	uint8_t * siblings_u8 = (uint8_t *)siblings;

	// Iterate Siblings
	for (int i = 0; i < siblingcount; i++)
	{
		// Allocate Memory
		SceNetAdhocMatchingMemberInternal * sibling = (SceNetAdhocMatchingMemberInternal *)malloc(sizeof(SceNetAdhocMatchingMemberInternal));

		// Allocated Memory
		if (sibling != NULL)
		{
			// Clear Memory
			memset(sibling, 0, sizeof(SceNetAdhocMatchingMemberInternal));

			// Save MAC Address
			memcpy(&sibling->mac, siblings_u8 + sizeof(SceNetEtherAddr) * i, sizeof(SceNetEtherAddr));

			// Set Peer State
			sibling->state = PSP_ADHOC_MATCHING_PEER_CHILD;

			// Initialize Ping Timer
			sibling->lastping = CoreTiming::GetGlobalTimeUsScaled(); //real_time_now()*1000000.0;

			// Link Peer, should check whether it's already added before
			sibling->next = context->peerlist;
			context->peerlist = sibling;

			// Spawn Established Event
			spawnLocalEvent(context, PSP_ADHOC_MATCHING_EVENT_ESTABLISHED, &sibling->mac, 0, NULL);

			char tmpmac[18];
			INFO_LOG(SCENET, "Accepting Peer %s", mac2str(&sibling->mac, tmpmac));
		}
	}
}

/**
* Count Children Peers (for Parent)
* @param context Matching Context Pointer
* @return Number of Children
*/
s32_le countChildren(SceNetAdhocMatchingContext * context, const bool excludeTimedout)
{
	// Children Counter
	s32_le count = 0;

	// Iterate Peer List for Matching Target
	SceNetAdhocMatchingMemberInternal * peer = context->peerlist; 
	for (; peer != NULL; peer = peer->next)
	{
		// Exclude timedout members?
		if (!excludeTimedout || peer->lastping != 0)
		// Increase Children Counter
		if (peer->state == PSP_ADHOC_MATCHING_PEER_CHILD) count++;
	}

	// Return Children Count
	return count;
}

/**
* Find Peer in Context by MAC
* @param context Matching Context Pointer
* @param mac Peer MAC Address
* @return Internal Peer Reference or... NULL
*/
SceNetAdhocMatchingMemberInternal * findPeer(SceNetAdhocMatchingContext * context, SceNetEtherAddr * mac)
{
	// Iterate Peer List for Matching Target
	SceNetAdhocMatchingMemberInternal * peer = context->peerlist; 
	for (; peer != NULL; peer = peer->next)
	{
		// Found Peer in List
		if (memcmp(&peer->mac, mac, sizeof(SceNetEtherAddr)) == 0)
		{
			// Return Peer Pointer
			return peer;
		}
	}

	// Peer not found
	return NULL;
}

/**
* Find Parent Peer
* @param context Matching Context Pointer
* @return Internal Peer Reference or... NULL
*/
SceNetAdhocMatchingMemberInternal * findParent(SceNetAdhocMatchingContext * context)
{
	// Iterate Peer List for Matching Target
	SceNetAdhocMatchingMemberInternal * peer = context->peerlist; 
	for (; peer != NULL; peer = peer->next)
	{
		// Found Peer in List
		if (peer->state == PSP_ADHOC_MATCHING_PEER_PARENT) return peer;
	}

	// Peer not found
	return NULL;
}

/**
* Find P2P Buddy Peer
* @param context Matching Context Pointer
* @return Internal Peer Reference or... NULL
*/
SceNetAdhocMatchingMemberInternal * findP2P(SceNetAdhocMatchingContext * context, const bool excludeTimedout)
{
	// Iterate Peer List for Matching Target
	SceNetAdhocMatchingMemberInternal * peer = context->peerlist; 
	for (; peer != NULL; peer = peer->next)
	{
		// Exclude timedout members?
		if (!excludeTimedout || peer->lastping != 0)
		// Found Peer in List
		if (peer->state == PSP_ADHOC_MATCHING_PEER_P2P) return peer;
	}

	// Peer not found
	return NULL;
}

/**
* Delete Peer from List
* @param context Matching Context Pointer
* @param peer Internal Peer Reference
*/
void deletePeer(SceNetAdhocMatchingContext * context, SceNetAdhocMatchingMemberInternal * peer)
{
	// Valid Arguments
	if (context != NULL && peer != NULL)
	{
		peerlock.lock();

		// Previous Peer Reference
		SceNetAdhocMatchingMemberInternal * previous = NULL;

		// Iterate Peer List
		SceNetAdhocMatchingMemberInternal * item = context->peerlist; 
		for (; item != NULL; item = item->next)
		{
			// Found Peer Match
			if (item == peer) break;

			// Set Previous Peer
			previous = item;
		}

		if (item != NULL) {
			// Middle Item
			if (previous != NULL) previous->next = item->next;

			// Beginning Item
			else context->peerlist = item->next;

			char tmpmac[18];
			INFO_LOG(SCENET, "Removing Member Peer %s", mac2str(&peer->mac, tmpmac));
		}

		// Free Peer Memory
		free(peer);
		peer = NULL;

		peerlock.unlock();
	}
}

/**
* Safely Link Thread Message to Event Thread Stack
* @param context Matching Context Pointer
* @param message Thread Message Pointer
*/
void linkEVMessage(SceNetAdhocMatchingContext * context, ThreadMessage * message)
{
	// Lock Access
	context->eventlock->lock();

	// Link Message
	message->next = context->event_stack;
	context->event_stack = message;

	// Unlock Access
	context->eventlock->unlock();
}

/**
* Safely Link Thread Message to IO Thread Stack
* @param context Matching Context Pointer
* @param message Thread Message Pointer
*/
void linkIOMessage(SceNetAdhocMatchingContext * context, ThreadMessage * message)
{
	// Lock Access
	context->inputlock->lock();

	// Link Message
	message->next = context->input_stack;
	context->input_stack = message;

	// Unlock Access
	context->inputlock->unlock();
}

/**
* Send Generic Thread Message
* @param context Matching Context Pointer
* @param stack ADHOC_MATCHING_EVENT_STACK or ADHOC_MATCHING_INPUT_STACK
* @param mac Target MAC
* @param opcode Message Opcode
* @param optlen Optional Data Length
* @param opt Optional Data
*/
void sendGenericMessage(SceNetAdhocMatchingContext * context, int stack, SceNetEtherAddr * mac, int opcode, int optlen, const void * opt)
{
	// Calculate Required Memory Size
	uint32_t size = sizeof(ThreadMessage) + optlen;

	// Allocate Memory
	uint8_t * memory = (uint8_t *)malloc(size);

	// Allocated Memory
	if (memory != NULL)
	{
		// Clear Memory
		memset(memory, 0, size);

		// Cast Header
		ThreadMessage * header = (ThreadMessage *)memory;

		// Set Message Opcode
		header->opcode = opcode;

		// Set Peer MAC Address
		header->mac = *mac;

		// Set Optional Data Length
		header->optlen = optlen;

		// Set Optional Data
		memcpy(memory + sizeof(ThreadMessage), opt, optlen);

		// Link Thread Message
		if (stack == PSP_ADHOC_MATCHING_EVENT_STACK) linkEVMessage(context, header);

		// Link Thread Message to Input Stack
		else linkIOMessage(context, header);

		// Exit Function
		return;
	}

	peerlock.lock();
	// Out of Memory Emergency Delete
	deletePeer(context, findPeer(context, mac));
	peerlock.unlock();
}

/**
* Send Accept Message from P2P -> P2P or Parent -> Children
* @param context Matching Context Pointer
* @param peer Target Peer
* @param optlen Optional Data Length
* @param opt Optional Data
*/
void sendAcceptMessage(SceNetAdhocMatchingContext * context, SceNetAdhocMatchingMemberInternal * peer, int optlen, const void * opt)
{
	// Send Accept Message
	sendGenericMessage(context, PSP_ADHOC_MATCHING_INPUT_STACK, &peer->mac, PSP_ADHOC_MATCHING_PACKET_ACCEPT, optlen, opt);
}

/**
* Send Join Request from P2P -> P2P or Children -> Parent
* @param context Matching Context Pointer
* @param peer Target Peer
* @param optlen Optional Data Length
* @param opt Optional Data
*/
void sendJoinRequest(SceNetAdhocMatchingContext * context, SceNetAdhocMatchingMemberInternal * peer, int optlen, const void * opt)
{
	// Send Join Message
	sendGenericMessage(context, PSP_ADHOC_MATCHING_INPUT_STACK, &peer->mac, PSP_ADHOC_MATCHING_PACKET_JOIN, optlen, opt);
}

/**
* Send Cancel Message to Peer (has various effects)
* @param context Matching Context Pointer
* @param peer Target Peer
* @param optlen Optional Data Length
* @param opt Optional Data
*/
void sendCancelMessage(SceNetAdhocMatchingContext * context, SceNetAdhocMatchingMemberInternal * peer, int optlen, const void * opt)
{
	// Send Cancel Message
	sendGenericMessage(context, PSP_ADHOC_MATCHING_INPUT_STACK, &peer->mac, PSP_ADHOC_MATCHING_PACKET_CANCEL, optlen, opt);
}

/**
* Send Bulk Data to Peer
* @param context Matching Context Pointer
* @param peer Target Peer
* @param datalen Data Length
* @param data Data
*/
void sendBulkData(SceNetAdhocMatchingContext * context, SceNetAdhocMatchingMemberInternal * peer, int datalen, const void * data)
{
	// Send Bulk Data Message
	sendGenericMessage(context, PSP_ADHOC_MATCHING_INPUT_STACK, &peer->mac, PSP_ADHOC_MATCHING_PACKET_BULK, datalen, data);
}

/**
* Abort Bulk Data Transfer (if in progress)
* @param context Matching Context Pointer
* @param peer Target Peer
*/
void abortBulkTransfer(SceNetAdhocMatchingContext * context, SceNetAdhocMatchingMemberInternal * peer)
{
	// Send Bulk Data Abort Message
	sendGenericMessage(context, PSP_ADHOC_MATCHING_INPUT_STACK, &peer->mac, PSP_ADHOC_MATCHING_PACKET_BULK_ABORT, 0, NULL);
}

/**
* Notify all established Peers about new Kid in the Neighborhood
* @param context Matching Context Pointer
* @param peer New Kid
*/
void sendBirthMessage(SceNetAdhocMatchingContext * context, SceNetAdhocMatchingMemberInternal * peer)
{
	// Send Birth Message
	sendGenericMessage(context, PSP_ADHOC_MATCHING_INPUT_STACK, &peer->mac, PSP_ADHOC_MATCHING_PACKET_BIRTH, 0, NULL);
}

/**
* Notify all established Peers about abandoned Child
* @param context Matching Context Pointer
* @param peer Abandoned Child
*/
void sendDeathMessage(SceNetAdhocMatchingContext * context, SceNetAdhocMatchingMemberInternal * peer)
{
	// Send Death Message
	sendGenericMessage(context, PSP_ADHOC_MATCHING_INPUT_STACK, &peer->mac, PSP_ADHOC_MATCHING_PACKET_DEATH, 0, NULL);
}

/**
* Return Number of Connected Peers
* @param context Matching Context Pointer
* @return Number of Connected Peers
*/
uint32_t countConnectedPeers(SceNetAdhocMatchingContext * context, const bool excludeTimedout)
{
	// Peer Count
	uint32_t count = 0;

	// Parent Mode
	if (context->mode == PSP_ADHOC_MATCHING_MODE_PARENT)
	{
		// Number of Children + 1 Parent (Self)
		count = countChildren(context, excludeTimedout) + 1;
	}

	// Child Mode
	else if (context->mode == PSP_ADHOC_MATCHING_MODE_CHILD)
	{
		// Default to 1 Child (Self)
		count = 1;

		// Connected to Parent
		if (findParent(context) != NULL)
		{
			// Add Number of Siblings + 1 Parents
			count += countChildren(context, excludeTimedout) + 1;
		}
	}

	// P2P Mode
	else
	{
		// Default to 1 P2P Client (Self)
		count = 1;

		// Connected to another P2P Client
		if (findP2P(context, excludeTimedout) != NULL)
		{
			// Add P2P Brother
			count++;
		}
	}

	// Return Peer Count
	return count;
}

/**
* Spawn Local Event for Event Thread
* @param context Matching Context Pointer
* @param event Event ID
* @param mac Event Source MAC
* @param optlen Optional Data Length
* @param opt Optional Data
*/
void spawnLocalEvent(SceNetAdhocMatchingContext * context, int event, SceNetEtherAddr * mac, int optlen, void * opt)
{
	// Spawn Local Event
	sendGenericMessage(context, PSP_ADHOC_MATCHING_EVENT_STACK, mac, event, optlen, opt);
}

/**
* Handle Timeouts in Matching Context
* @param context Matching Context Pointer
*/
void handleTimeout(SceNetAdhocMatchingContext * context)
{
	peerlock.lock();
	// Iterate Peer List
	SceNetAdhocMatchingMemberInternal * peer = context->peerlist; 
	while (peer != NULL && contexts != NULL && coreState != CORE_POWERDOWN)
	{
		// Get Next Pointer (to avoid crash on memory freeing)
		SceNetAdhocMatchingMemberInternal * next = peer->next;

		u64_le now = CoreTiming::GetGlobalTimeUsScaled(); //real_time_now()*1000000.0
		// Timeout!, may be we shouldn't kick timedout members ourself and let the game do it
		if ((now - peer->lastping) >= context->timeout) 
		{
			// Spawn Timeout Event
			if ((context->mode == PSP_ADHOC_MATCHING_MODE_CHILD && (peer->state == PSP_ADHOC_MATCHING_PEER_CHILD || peer->state == PSP_ADHOC_MATCHING_PEER_PARENT)) ||
				(context->mode == PSP_ADHOC_MATCHING_MODE_PARENT && peer->state == PSP_ADHOC_MATCHING_PEER_CHILD) ||
				(context->mode == PSP_ADHOC_MATCHING_MODE_P2P && peer->state == PSP_ADHOC_MATCHING_PEER_P2P)) {
				spawnLocalEvent(context, PSP_ADHOC_MATCHING_EVENT_TIMEOUT, &peer->mac, 0, NULL); // This is the only code that use PSP_ADHOC_MATCHING_EVENT_TIMEOUT, should we let it timedout?
			}

			char tmpmac[18];
			INFO_LOG(SCENET, "TimedOut Member Peer %s (%lldms)", mac2str(&peer->mac, tmpmac), (context->timeout/1000));

			// Delete Peer from List
			deletePeer(context, peer);
			//peer->lastping = 0; //Let's just make the game kick timedout members during sceNetAdhocMatchingGetMembers
		}

		// Move Pointer
		peer = next;
	}
	peerlock.unlock();
}

/**
* Recursive Stack Cleaner
* @param node Current Thread Message Node
*/
void clearStackRecursive(ThreadMessage * node)
{
	// Not End of List
	if (node != NULL) clearStackRecursive(node->next);

	// Free Last Existing Node of List (NULL is handled in _free)
	free(node);
	node = NULL;
}

/**
* Clear Thread Stack
* @param context Matching Context Pointer
* @param stack ADHOC_MATCHING_EVENT_STACK or ADHOC_MATCHING_INPUT_STACK
*/
void clearStack(SceNetAdhocMatchingContext * context, int stack)
{
	if (context == NULL) return;

	// Clear Event Stack
	if (stack == PSP_ADHOC_MATCHING_EVENT_STACK)
	{
		context->eventlock->lock();
		// Free Memory Recursively
		clearStackRecursive(context->event_stack);

		// Destroy Reference
		context->event_stack = NULL;
		
		context->eventlock->unlock();
	}

	// Clear IO Stack
	else
	{
		context->inputlock->lock();
		// Free Memory Recursively
		clearStackRecursive(context->input_stack);

		// Destroy Reference
		context->input_stack = NULL;

		context->inputlock->unlock();
	}
}

/**
* Clear Peer List
* @param context Matching Context Pointer
*/
void clearPeerList(SceNetAdhocMatchingContext * context)
{
	// Acquire Peer Lock
	peerlock.lock();

	// Iterate Peer List
	SceNetAdhocMatchingMemberInternal * peer = context->peerlist; 
	while (peer != NULL)
	{
		// Grab Next Pointer
		context->peerlist = peer->next; //SceNetAdhocMatchingMemberInternal * next = peer->next;

		// Delete Peer
		free(peer); //deletePeer(context, peer);
		// Instead of removing peer immediately, We should give a little time before removing the peer and let it timed out? just in case the game is in the middle of communicating with the peer on another thread so it won't recognize it as Unknown peer
		//peer->lastping = CoreTiming::GetGlobalTimeUsScaled();

		// Move Pointer
		peer = context->peerlist; //peer = next;
	}

	// Free Peer Lock
	peerlock.unlock();
}

// It seems After Actions being called in reverse order of Mipscall order (ie. MipsCall order of ACCEPT(6)->ESTABLISH(7) getting AfterAction order of ESTABLISH(7)->ACCEPT(6)
void AfterMatchingMipsCall::run(MipsCall &call) {
	if (context == NULL) {
		peerlock.lock();
		context = findMatchingContext(contextID);
		peerlock.unlock();
	}
	u32 v0 = currentMIPS->r[MIPS_REG_V0];
	if (__IsInInterrupt()) ERROR_LOG(SCENET, "AfterMatchingMipsCall::run [ID=%i][Event=%d] is Returning Inside an Interrupt!", contextID, EventID);
	if (Memory::IsValidAddress(bufAddr)) userMemory.Free(bufAddr);
	SetMatchingInCallback(context, false);
	DEBUG_LOG(SCENET, "AfterMatchingMipsCall::run [ID=%i][Event=%d] [cbId: %u][retV0: %08x]", contextID, EventID, call.cbId, v0);
	//call.setReturnValue(v0);
}

void AfterMatchingMipsCall::SetData(int ContextID, int eventId, u32_le BufAddr) {
	contextID = ContextID;
	EventID = eventId;
	bufAddr = BufAddr;
	peerlock.lock();
	context = findMatchingContext(ContextID);
	peerlock.unlock();
}

bool SetMatchingInCallback(SceNetAdhocMatchingContext* context, bool IsInCB) {
	if (context == NULL) return false;
	context->eventlock->lock(); //peerlock.lock();
	context->IsMatchingInCB = IsInCB;
	context->eventlock->unlock(); //peerlock.unlock();
	return IsInCB;
}

bool IsMatchingInCallback(SceNetAdhocMatchingContext* context) {
	bool inCB = false;
	if (context == NULL) return inCB;
	context->eventlock->lock(); //peerlock.lock();
	inCB = (context->IsMatchingInCB);
	context->eventlock->unlock(); //peerlock.unlock();
	return inCB;
}

void AfterAdhocMipsCall::run(MipsCall& call) {
	u32 v0 = currentMIPS->r[MIPS_REG_V0];
	if (__IsInInterrupt()) ERROR_LOG(SCENET, "AfterAdhocMipsCall::run [ID=%i][Event=%d] is Returning Inside an Interrupt!", HandlerID, EventID);
	SetAdhocctlInCallback(false);
	DEBUG_LOG(SCENET, "AfterAdhocMipsCall::run [ID=%i][Event=%d] [cbId: %u][retV0: %08x]", HandlerID, EventID, call.cbId, v0);
	//call.setReturnValue(v0);
}

void AfterAdhocMipsCall::SetData(int handlerID, int eventId, u32_le ArgsAddr) {
	HandlerID = handlerID;
	EventID = eventId;
	argsAddr = ArgsAddr;
}

int SetAdhocctlInCallback(bool IsInCB) {
	std::lock_guard<std::recursive_mutex> adhocGuard(adhocEvtMtx);
	IsAdhocctlInCB += (IsInCB?1:-1);
	return IsAdhocctlInCB;
}

int IsAdhocctlInCallback() {
	std::lock_guard<std::recursive_mutex> adhocGuard(adhocEvtMtx);
	int inCB = IsAdhocctlInCB;
	return inCB;
}

// Make sure MIPS calls have been fully executed before the next notifyAdhocctlHandlers
void notifyAdhocctlHandlers(u32 flag, u32 error) {
	__UpdateAdhocctlHandlers(flag, error);
}

// Matching callback is void function: typedef void(*SceNetAdhocMatchingHandler)(int id, int event, SceNetEtherAddr * peer, int optlen, void * opt);
// Important! The MIPS call need to be fully executed before the next MIPS call invoked, as the game (ie. DBZ Tag Team) may need to prepare something for the next callback event to use
// Note: Must not lock peerlock within this function to prevent race-condition with other thread whos owning peerlock and trying to lock context->eventlock owned by this thread
void notifyMatchingHandler(SceNetAdhocMatchingContext * context, ThreadMessage * msg, void * opt, u32_le &bufAddr, u32_le &bufLen, u32_le * args) {
	// Don't share buffer address space with other mipscall in the queue since mipscalls aren't immediately executed
	MatchingArgs argsNew;
	u32_le dataBufLen = msg->optlen + 8; //max(bufLen, msg->optlen + 8);
	u32_le dataBufAddr = userMemory.Alloc(dataBufLen); // We will free this memory after returning from mipscall
	uint8_t * dataPtr = Memory::GetPointer(dataBufAddr);
	memcpy(dataPtr, &msg->mac, sizeof(msg->mac));
	if (msg->optlen > 0) 
		memcpy(dataPtr + 8, opt, msg->optlen);
	argsNew.data[0] = context->id;
	argsNew.data[1] = msg->opcode;
	argsNew.data[2] = dataBufAddr;
	argsNew.data[3] = msg->optlen;
	argsNew.data[4] = dataBufAddr + 8; // OptData Addr
	argsNew.data[5] = context->handler.entryPoint; //not part of callback argument, just borrowing a space to store callback address so i don't need to search the context first later
	
	// ScheduleEvent_Threadsafe_Immediate seems to get mixed up with interrupt (returning from mipscall inside an interrupt) and getting invalid address before returning from interrupt
	__UpdateMatchingHandler(argsNew);
}

void freeFriendsRecursive(SceNetAdhocctlPeerInfo * node, int32_t* count) {
	// End of List
	if (node == NULL) return;

	// Increase Recursion Depth
	freeFriendsRecursive(node->next, count);

	// Free Memory
	free(node);
	node = NULL;
	if (count != NULL) (*count)++;
}

void timeoutFriendsRecursive(SceNetAdhocctlPeerInfo* node, int32_t* count) {
	// End of List
	if (node == NULL) return;

	// Increase Recursion Depth
	timeoutFriendsRecursive(node->next, count);

	// Set last timestamp
	node->last_recv = 0;
	if (count != NULL) (*count)++;
}

void sendChat(std::string chatString) {
	SceNetAdhocctlChatPacketC2S chat;
	auto n = GetI18NCategory("Networking");
	chat.base.opcode = OPCODE_CHAT;
	//TODO check network inited, check send success or not, chatlog.pushback error on failed send, pushback error on not connected
	if (friendFinderRunning)
	{
		// Send Chat to Server 
		if (!chatString.empty()) {
			//maximum char allowed is 64 character for compability with original server (pro.coldbird.net)
			message = chatString.substr(0, 60); // 64 return chat variable corrupted is it out of memory?
			strcpy(chat.message, message.c_str());
			//Send Chat Messages
			int chatResult = send(metasocket, (const char *)&chat, sizeof(chat), 0);
			NOTICE_LOG(SCENET, "Send Chat %s to Adhoc Server", chat.message);
			name = g_Config.sNickName.c_str();
			chatLog.push_back(name.substr(0, 8) + ": " + chat.message);
			if (chatScreenVisible) {
				updateChatScreen = true;
			}
		}
	}
	else {
		chatLog.push_back(n->T("You're in Offline Mode, go to lobby or online hall"));
		if (chatScreenVisible) {
			updateChatScreen = true;
		}
	}
}

std::vector<std::string> getChatLog() {
	// this log used by chat screen
	if (chatLog.size() > 50) {
		//erase the first 40 element limit the chatlog size
		chatLog.erase(chatLog.begin(), chatLog.begin() + 40);
	}
	return chatLog;
}

int friendFinder(){
	setCurrentThreadName("FriendFinder");
	// Receive Buffer
	int rxpos = 0;
	uint8_t rx[1024];

	// Chat Packet
	SceNetAdhocctlChatPacketC2S chat;
	chat.base.opcode = OPCODE_CHAT;

	// Last Ping Time
	uint64_t lastping = 0;

	// Last Time Reception got updated
	uint64_t lastreceptionupdate = 0;

	uint64_t now;

	// Log Startup
	INFO_LOG(SCENET, "FriendFinder: Begin of Friend Finder Thread");

	// Finder Loop
	while (friendFinderRunning) {
		// Acquire Network Lock
		//_acquireNetworkLock();

		// Ping Server
		now = real_time_now() * 1000000.0; // CoreTiming::GetGlobalTimeUsScaled(); // Use real_time_now()*1000000.0 if the game gets disconnected from AdhocServer too fast when FPS wasn't stable
		if (now - lastping >= PSP_ADHOCCTL_PING_TIMEOUT) { //100 // We need to use lower interval to prevent getting timeout at Pro Adhoc Server through internet
			// original code : ((sceKernelGetSystemTimeWide() - lastping) >= ADHOCCTL_PING_TIMEOUT)
			// Update Ping Time
			lastping = now;

			// Prepare Packet
			uint8_t opcode = OPCODE_PING;

			// Send Ping to Server, may failed with socket error 10054/10053 if someone else with the same IP already connected to AdHoc Server (the server might need to be modified to differentiate MAC instead of IP)
			int iResult = send(metasocket, (const char *)&opcode, 1, 0);
			/*if (iResult == SOCKET_ERROR) {
			ERROR_LOG(SCENET, "FriendFinder: Socket Error (%i) when sending OPCODE_PING", errno);
			//friendFinderRunning = false;
			}*/
		}

		// Wait for Incoming Data
		int received = recv(metasocket, (char *)(rx + rxpos), sizeof(rx) - rxpos, 0);

		// Free Network Lock
		//_freeNetworkLock();

		// Received Data
		if (received > 0) {
			// Fix Position
			rxpos += received;

			// Log Incoming Traffic
			//printf("Received %d Bytes of Data from Server\n", received);
			INFO_LOG(SCENET, "Received %d Bytes of Data from Adhoc Server", received);
		}

		// Handle Packets
		if (rxpos > 0) {
			// BSSID Packet
			if (rx[0] == OPCODE_CONNECT_BSSID) {
				// Enough Data available
				if (rxpos >= (int)sizeof(SceNetAdhocctlConnectBSSIDPacketS2C)) {
					// Cast Packet
					SceNetAdhocctlConnectBSSIDPacketS2C * packet = (SceNetAdhocctlConnectBSSIDPacketS2C *)rx;

					char tmpmac[18];
					INFO_LOG(SCENET, "FriendFinder: Incoming OPCODE_CONNECT_BSSID [%s]", mac2str(&packet->mac, tmpmac));
					// from JPCSP: Some games have problems when the PSP_ADHOCCTL_EVENT_CONNECTED is sent too quickly after connecting to a network. The connection will be set CONNECTED with a small delay (200ms or 200us?)
					/*if (adhocctlCurrentMode == ADHOCCTL_MODE_GAMEMODE) {
						setState(ADHOCCTL_STATE_GAMEMODE);
						notifyAdhocctlHandlers(ADHOCCTL_EVENT_GAME, 0);
					}
					else {
						setState(ADHOCCTL_STATE_CONNECTED);
						notifyAdhocctlHandlers(ADHOCCTL_EVENT_CONNECT, 0);
					}*/
					
					// Update User BSSID
					//parameter.bssid.mac_addr = packet->mac; // The MAC address in this packet seems to Always be the First player joining the Group (group Creator?), Shouldn't it be it self?
					// Notify Event Handlers
					//notifyAdhocctlHandlers(ADHOCCTL_EVENT_CONNECT, 0);
					// Change State
					threadStatus = ADHOCCTL_STATE_CONNECTED;
					// Give time a little time
					//sceKernelDelayThread(adhocEventDelayMS * 1000);
					//sleep_ms(adhocEventDelayMS);
					
					// Move RX Buffer
					memmove(rx, rx + sizeof(SceNetAdhocctlConnectBSSIDPacketS2C), sizeof(rx) - sizeof(SceNetAdhocctlConnectBSSIDPacketS2C));

					// Fix RX Buffer Length
					rxpos -= sizeof(SceNetAdhocctlConnectBSSIDPacketS2C);
				}
			}

			// Chat Packet
			else if (rx[0] == OPCODE_CHAT) {
				// Enough Data available
				if (rxpos >= (int)sizeof(SceNetAdhocctlChatPacketS2C)) {
					// Cast Packet
					SceNetAdhocctlChatPacketS2C * packet = (SceNetAdhocctlChatPacketS2C *)rx;
					INFO_LOG(SCENET, "FriendFinder: Incoming OPCODE_CHAT");
					
					// Fix strings with null-terminated
					packet->name.data[ADHOCCTL_NICKNAME_LEN - 1] = 0;
					packet->base.message[ADHOCCTL_MESSAGE_LEN - 1] = 0;

					// Add Incoming Chat to HUD
					NOTICE_LOG(SCENET, "Received chat message %s", packet->base.message);
					incoming = "";
					name = (char *)packet->name.data;
					incoming.append(name.substr(0, 8));
					incoming.append(": ");
					incoming.append((char *)packet->base.message);
					chatLog.push_back(incoming);
					//im new to pointer btw :( doesn't know its safe or not this should update the chat screen when data coming
					if (chatScreenVisible) {
						updateChatScreen = true;
					}
					else {
						if (newChat < 50) {
							newChat += 1;
						}
					}

					// Move RX Buffer
					memmove(rx, rx + sizeof(SceNetAdhocctlChatPacketS2C), sizeof(rx) - sizeof(SceNetAdhocctlChatPacketS2C));

					// Fix RX Buffer Length
					rxpos -= sizeof(SceNetAdhocctlChatPacketS2C);
				}
			}

			// Connect Packet
			else if (rx[0] == OPCODE_CONNECT) {
				// Enough Data available
				if (rxpos >= (int)sizeof(SceNetAdhocctlConnectPacketS2C)) {
					// Cast Packet
					SceNetAdhocctlConnectPacketS2C * packet = (SceNetAdhocctlConnectPacketS2C *)rx;

					DEBUG_LOG(SCENET, "FriendFinder: OPCODE_CONNECT");

					// Fix strings with null-terminated
					packet->name.data[ADHOCCTL_NICKNAME_LEN - 1] = 0;

					// Log Incoming Peer
					INFO_LOG(SCENET, "Incoming Peer Data...");

					// Add User
					addFriend(packet);

					/* // Make sure GameMode participants are all joined (including self MAC)
					if (adhocctlCurrentMode == PSP_ADHOCCTL_MODE_GAMEMODE) {
						// From JPCSP: Join complete when all the required MACs have joined
					}*/

					// Update HUD User Count
					incoming = "";
					incoming.append((char *)packet->name.data);
					incoming.append(" Joined ");
					//do we need ip?
					//joined.append((char *)packet->ip);
					chatLog.push_back(incoming);
					//im new to pointer btw :( doesn't know its safe or not this should update the chat screen when data coming
					if (chatScreenVisible) {
						updateChatScreen = true;
					}
				
#ifdef LOCALHOST_AS_PEER
					setUserCount(getActivePeerCount());
#else
					// setUserCount(getActivePeerCount()+1);
#endif

					// Move RX Buffer
					memmove(rx, rx + sizeof(SceNetAdhocctlConnectPacketS2C), sizeof(rx) - sizeof(SceNetAdhocctlConnectPacketS2C));

					// Fix RX Buffer Length
					rxpos -= sizeof(SceNetAdhocctlConnectPacketS2C);
				}
			}

			// Disconnect Packet
			else if (rx[0] == OPCODE_DISCONNECT) {
				// Enough Data available
				if (rxpos >= (int)sizeof(SceNetAdhocctlDisconnectPacketS2C)) {
					// Cast Packet
					SceNetAdhocctlDisconnectPacketS2C * packet = (SceNetAdhocctlDisconnectPacketS2C *)rx;

					DEBUG_LOG(SCENET, "FriendFinder: OPCODE_DISCONNECT");

					// Log Incoming Peer Delete Request
					INFO_LOG(SCENET, "FriendFinder: Incoming Peer Data Delete Request...");

					// Delete User by IP, should delete by MAC since IP can be shared (behind NAT) isn't?
					deleteFriendByIP(packet->ip);

					// Update HUD User Count
#ifdef LOCALHOST_AS_PEER
					setUserCount(_getActivePeerCount());
#else
					//setUserCount(_getActivePeerCount()+1);
#endif

					// Move RX Buffer
					memmove(rx, rx + sizeof(SceNetAdhocctlDisconnectPacketS2C), sizeof(rx) - sizeof(SceNetAdhocctlDisconnectPacketS2C));

					// Fix RX Buffer Length
					rxpos -= sizeof(SceNetAdhocctlDisconnectPacketS2C);
				}
			}

			// Scan Packet
			else if (rx[0] == OPCODE_SCAN) {
				// Enough Data available
				if (rxpos >= (int)sizeof(SceNetAdhocctlScanPacketS2C)) {
					// Cast Packet
					SceNetAdhocctlScanPacketS2C * packet = (SceNetAdhocctlScanPacketS2C *)rx;

					DEBUG_LOG(SCENET, "FriendFinder: OPCODE_SCAN");

					// Log Incoming Network Information
					INFO_LOG(SCENET, "Incoming Group Information...");

					// Multithreading Lock
					peerlock.lock();

					// Should only add non-existing group (or replace an existing group) to prevent Ford Street Racing from showing a strange game session list
					SceNetAdhocctlScanInfo * group = findGroup(&packet->mac);

					if (group != NULL) {
						// Copy Group Name
						group->group_name = packet->group;

						// Set Group Host
						group->bssid.mac_addr = packet->mac;
					} else {
						// Allocate Structure Data
						SceNetAdhocctlScanInfo * group = (SceNetAdhocctlScanInfo *)malloc(sizeof(SceNetAdhocctlScanInfo));

						// Allocated Structure Data
						if (group != NULL) {
							// Clear Memory, should this be done only when allocating new group?
							memset(group, 0, sizeof(SceNetAdhocctlScanInfo));

							// Link to existing Groups
							group->next = newnetworks;

							// Copy Group Name
							group->group_name = packet->group;

							// Set Group Host
							group->bssid.mac_addr = packet->mac;

							// Set group parameters
							group->channel = parameter.channel;
							group->mode = ADHOCCTL_MODE_ADHOC; //adhocctlCurrentMode;

							// Link into Group List
							newnetworks = group;
						}
					}

					// Multithreading Unlock
					peerlock.unlock();

					// Move RX Buffer
					memmove(rx, rx + sizeof(SceNetAdhocctlScanPacketS2C), sizeof(rx) - sizeof(SceNetAdhocctlScanPacketS2C));

					// Fix RX Buffer Length
					rxpos -= sizeof(SceNetAdhocctlScanPacketS2C);
				}
			}

			// Scan Complete Packet
			else if (rx[0] == OPCODE_SCAN_COMPLETE) {
				DEBUG_LOG(SCENET, "FriendFinder: OPCODE_SCAN_COMPLETE");
				// Log Scan Completion
				INFO_LOG(SCENET, "FriendFinder: Incoming Scan complete response...");

				// Reset current networks to prevent leaving host to be listed again
				peerlock.lock();
				freeGroupsRecursive(networks);
				networks = newnetworks;
				newnetworks = NULL;
				peerlock.unlock();

				// Notify Event Handlers
				//notifyAdhocctlHandlers(ADHOCCTL_EVENT_SCAN, 0);
				//int i = 0; for(; i < ADHOCCTL_MAX_HANDLER; i++)
				//{
				//        // Active Handler
				//        if(_event_handler[i] != NULL) _event_handler[i](ADHOCCTL_EVENT_SCAN, 0, _event_args[i]);
				//}
				// Change State
				threadStatus = ADHOCCTL_STATE_DISCONNECTED;
				// Give time a little time
				//sceKernelDelayThread(adhocEventDelayMS * 1000);
				//sleep_ms(adhocEventDelayMS);

				// Move RX Buffer
				memmove(rx, rx + 1, sizeof(rx) - 1);

				// Fix RX Buffer Length
				rxpos -= 1;
			}
		}
		// This delay time should be 100ms when there is an event otherwise 500ms ?
		sleep_ms(1); // Using 1ms for faster response just like AdhocServer?

		// Don't do anything if it's paused, otherwise the log will be flooded
		while (Core_IsStepping() && coreState != CORE_POWERDOWN && friendFinderRunning) sleep_ms(1);
	}

	// Groups/Networks should be deallocated isn't?

	// Prevent the games from having trouble to reInitiate Adhoc (the next NetInit -> PdpCreate after NetTerm)
	threadStatus = ADHOCCTL_STATE_DISCONNECTED;

	// Log Shutdown
	INFO_LOG(SCENET, "FriendFinder: End of Friend Finder Thread");

	// Return Success
	return 0;
}

int getActivePeerCount(const bool excludeTimedout) {
	// Counter
	int count = 0;

	// #ifdef LOCALHOST_AS_PEER
	// // Increase for Localhost
	// count++;
	// #endif

	// Peer Reference
	SceNetAdhocctlPeerInfo * peer = friends;

	// Iterate Peers
	for (; peer != NULL; peer = peer->next) {
		// Increase Counter, Should we exclude peers pending for timed out?
		if (!excludeTimedout || peer->last_recv != 0)
			count++;
	}

	// Return Result
	return count;
}

int getLocalIp(sockaddr_in * SocketAddress){
#if defined(_WIN32)
	// Get local host name
	char szHostName[256] = "";

	if(::gethostname(szHostName, sizeof(szHostName))) {
		// Error handling 
	}
	// Get local IP addresses
	struct hostent *pHost = 0;
	pHost = ::gethostbyname(szHostName);
	if(pHost) {
		memcpy(&SocketAddress->sin_addr, pHost->h_addr_list[0], pHost->h_length);
		if (isLocalServer) {
			SocketAddress->sin_addr = ((sockaddr_in*)&localIP)->sin_addr;
		}
		return 0;
	}
	return -1;
#else
	char szHostName[256] = "";
	gethostname(szHostName, sizeof(szHostName));
	struct hostent* pHost = 0;
	pHost = gethostbyname(szHostName);
	if (pHost) {
		memcpy(&SocketAddress->sin_addr, pHost->h_addr_list[0], pHost->h_length);
		if (isLocalServer) {
			SocketAddress->sin_addr = ((sockaddr_in*)&localIP)->sin_addr;
		}
		return 0;
	}
	return -1;
#endif
}

uint32_t getLocalIp(int sock) {
	struct sockaddr_in localAddr;
	localAddr.sin_addr.s_addr = INADDR_ANY;
	socklen_t addrLen = sizeof(localAddr);
	getsockname(sock, (struct sockaddr*)&localAddr, &addrLen);
	if (isLocalServer) {
		localAddr.sin_addr = ((sockaddr_in*)&localIP)->sin_addr;
	}
	return localAddr.sin_addr.s_addr;
}

void getLocalMac(SceNetEtherAddr * addr){
	// Read MAC Address from config
	uint8_t mac[ETHER_ADDR_LEN] = {0};
	if (PPSSPP_ID > 1) {
		memset(&mac, PPSSPP_ID, sizeof(mac));
	}
	else
	if (!ParseMacAddress(g_Config.sMACAddress.c_str(), mac)) {
		ERROR_LOG(SCENET, "Error parsing mac address %s", g_Config.sMACAddress.c_str());
	}
	memcpy(addr, mac, ETHER_ADDR_LEN);
}

uint16_t getLocalPort(int sock) {
	struct sockaddr_in localAddr;
	localAddr.sin_port = 0;
	socklen_t addrLen = sizeof(localAddr);
	getsockname(sock, (struct sockaddr*)&localAddr, &addrLen);
	return ntohs(localAddr.sin_port);
}

int getSockBufferSize(int sock, int opt) { // opt = SO_RCVBUF/SO_SNDBUF
	int n = 16384;
	socklen_t m = sizeof(n);
	getsockopt(sock, SOL_SOCKET, opt, (char *)&n, &m); // in linux the value is twice of the value being set using setsockopt
	return (n/2);
}

int setSockBufferSize(int sock, int opt, int size) { // opt = SO_RCVBUF/SO_SNDBUF
	int n = size; // 8192; //16384
	return setsockopt(sock, SOL_SOCKET, opt, (char *)&n, sizeof(n));
}

/**
* Return the Number of Players with the chosen Nickname in the Local Users current Network
* @param nickname To-be-searched Nickname
* @return Number of matching Players
*/
int getNicknameCount(const char * nickname)
{
	// Counter
	int count = 0;

	// Local Nickname Matches
	if (strcmp((char *)parameter.nickname.data, nickname) == 0) count++;

	// Peer Reference
	SceNetAdhocctlPeerInfo * peer = friends;

	// Iterate Peers
	for (; peer != NULL; peer = peer->next)
	{
		// Match found
		if (strcmp((char *)peer->nickname.data, nickname) == 0) count++;
	}

	// Return Result
	return count;
}

/**
* PDP Socket Counter
* @return Number of internal PDP Sockets
*/
int getPDPSocketCount()
{
	// Socket Counter
	int counter = 0;

	// Count Sockets
	for (int i = 0; i < 255; i++) if (pdp[i] != NULL) counter++;

	// Return Socket Count
	return counter;
}

int getPTPSocketCount() {
	// Socket Counter
	int counter = 0;

	// Count Sockets
	for (int i = 0; i < 255; i++) if (ptp[i] != NULL) counter++;

	// Return Socket Count
	return counter;
}

int initNetwork(SceNetAdhocctlAdhocId *adhoc_id){
	auto n = GetI18NCategory("Networking");
	int iResult = 0;
	metasocket = (int)INVALID_SOCKET;
	metasocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
	if (metasocket == INVALID_SOCKET){
		ERROR_LOG(SCENET, "Invalid socket");
		return SOCKET_ERROR;
	}
	struct sockaddr_in server_addr;
	server_addr.sin_family = AF_INET;
	server_addr.sin_port = htons(SERVER_PORT); //27312 // Maybe read this from config too

	// Resolve dns
	addrinfo * resultAddr;
	addrinfo * ptr;
	in_addr serverIp;
	serverIp.s_addr = INADDR_NONE;

	iResult = getaddrinfo(g_Config.proAdhocServer.c_str(),0,NULL,&resultAddr);
	if (iResult != 0) {
		ERROR_LOG(SCENET, "DNS Error (%s)\n", g_Config.proAdhocServer.c_str());
		host->NotifyUserMessage(n->T("DNS Error connecting to ") + g_Config.proAdhocServer, 5.0f, 0x0000ff);
		return iResult;
	}
	for (ptr = resultAddr; ptr != NULL; ptr = ptr->ai_next) {
		switch (ptr->ai_family) {
		case AF_INET:
			serverIp = ((sockaddr_in *)ptr->ai_addr)->sin_addr;
			break;
		}
	}

	freeaddrinfo(resultAddr);

	// If Server is at localhost Try to Bind socket to specific adapter before connecting to prevent 2nd instance being recognized as already existing 127.0.0.1 by AdhocServer
	// (may not works in WinXP/2003 for IPv4 due to "Weak End System" model)
	if (((uint8_t*)&serverIp.s_addr)[0] == 0x7f) { // (serverIp.S_un.S_un_b.s_b1 == 0x7f) 
		int on = 1;
		setsockopt(metasocket, SOL_SOCKET, SO_REUSEADDR, (const char*)&on, sizeof(on));
		setsockopt(metasocket, SOL_SOCKET, SO_DONTROUTE, (const char*)&on, sizeof(on));

		((struct sockaddr_in*) & localIP)->sin_port = 0;
		// Bind Local Address to Socket
		iResult = bind(metasocket, (struct sockaddr*) & localIP, sizeof(sockaddr));
		if (iResult == SOCKET_ERROR) {
			ERROR_LOG(SCENET, "Bind to alternate localhost[%s] failed(%i).", inet_ntoa(((struct sockaddr_in*) & localIP)->sin_addr), iResult);
			host->NotifyUserMessage(std::string(n->T("Failed to Bind Localhost IP")) + " " + inet_ntoa(((struct sockaddr_in*) & localIP)->sin_addr), 3.0, 0x0000ff);
		}
	}
	
	// Default/Initial Network
	memset(&parameter, 0, sizeof(parameter));
	strcpy((char *)&parameter.nickname.data, g_Config.sNickName.c_str());
	parameter.channel = g_Config.iWlanAdhocChannel; // Fake Channel, 0 = Auto where JPCSP use 11 as default for Auto (Commonly for Auto: 1, 6, 11)
	if (parameter.channel == PSP_SYSTEMPARAM_ADHOC_CHANNEL_AUTOMATIC) parameter.channel = 1;
	getLocalMac(&parameter.bssid.mac_addr);
	
	// Default ProductId
	product_code.type = adhoc_id->type;
	memcpy(product_code.data, adhoc_id->data, ADHOCCTL_ADHOCID_LEN);

	// Connect to Adhoc Server
	server_addr.sin_addr = serverIp;
	iResult = connect(metasocket,(sockaddr *)&server_addr,sizeof(server_addr));
	if (iResult == SOCKET_ERROR) {
		char buffer[512];
		snprintf(buffer, sizeof(buffer), "Socket error (%i) when connecting to AdhocServer [%s/%s:%u]", errno, g_Config.proAdhocServer.c_str(), inet_ntoa(server_addr.sin_addr), ntohs(server_addr.sin_port));
		ERROR_LOG(SCENET, "%s", buffer);
		host->NotifyUserMessage(buffer, 5.0f, 0x0000ff);
		return iResult;
	}

	// Prepare Login Packet
	SceNetAdhocctlLoginPacketC2S packet;
	packet.base.opcode = OPCODE_LOGIN;
	SceNetEtherAddr addres;
	getLocalMac(&addres);
	packet.mac = addres;
	strcpy((char *)packet.name.data, g_Config.sNickName.c_str());
	memcpy(packet.game.data, adhoc_id->data, ADHOCCTL_ADHOCID_LEN);
	int sent = send(metasocket, (char*)&packet, sizeof(packet), 0);
	changeBlockingMode(metasocket, 1); // Change to non-blocking
	if (sent > 0) {
		host->NotifyUserMessage(n->T("Network Initialized"), 1.0);
		return 0;
	}
	else{
		return SOCKET_ERROR;
	}
}

bool isBroadcastMAC(const SceNetEtherAddr * addr) {
	// Broadcast MAC
	if (memcmp(addr->data, "\xFF\xFF\xFF\xFF\xFF\xFF", ETHER_ADDR_LEN) == 0) return true;
	// Normal MAC
	return false;
}

bool resolveIP(uint32_t ip, SceNetEtherAddr * mac) {
	sockaddr_in addr;
	getLocalIp(&addr);
	uint32_t localIp = addr.sin_addr.s_addr;

	if (ip == localIp || ip == ((sockaddr_in*)&localIP)->sin_addr.s_addr){
		getLocalMac(mac);
		return true;
	}

	// Multithreading Lock
	peerlock.lock();

	// Peer Reference
	SceNetAdhocctlPeerInfo * peer = friends;

	// Iterate Peers
	for (; peer != NULL; peer = peer->next) {
		// Found Matching Peer
		if (peer->ip_addr == ip) {
			// Copy Data
			*mac = peer->mac_addr;

			// Multithreading Unlock
			peerlock.unlock();

			// Return Success
			return true;
		}
	}

	// Multithreading Unlock
	peerlock.unlock();

	// Peer not found
	return false;
}

bool resolveMAC(SceNetEtherAddr * mac, uint32_t * ip) {
	// Get Local MAC Address
	SceNetEtherAddr localMac;
	getLocalMac(&localMac);
	// Local MAC Requested
	if (memcmp(&localMac, mac, sizeof(SceNetEtherAddr)) == 0) {
		// Get Local IP Address
		sockaddr_in sockAddr;
		getLocalIp(&sockAddr);
		*ip = sockAddr.sin_addr.s_addr;
		return true; // return succes
	}

	// Multithreading Lock
	std::lock_guard<std::recursive_mutex> guard(peerlock);

	// Peer Reference
	SceNetAdhocctlPeerInfo * peer = friends;

	// Iterate Peers
	for (; peer != NULL; peer = peer->next) {
		// Found Matching Peer
		if (memcmp(&peer->mac_addr, mac, sizeof(SceNetEtherAddr)) == 0) {
			// Copy Data
			*ip = peer->ip_addr;

			// Return Success
			return true;
		}
	}

	// Peer not found
	return false;
}

bool validNetworkName(const SceNetAdhocctlGroupName * group_name) {
	// Result
	bool valid = true;

	// Name given
	if (group_name != NULL) {
		// Iterate Name Characters
		for (int i = 0; i < ADHOCCTL_GROUPNAME_LEN && valid; i++) {
			// End of Name
			if (group_name->data[i] == 0) break;

			// Not a digit
			if (group_name->data[i] < '0' || group_name->data[i] > '9') {
				// Not 'A' to 'Z'
				if (group_name->data[i] < 'A' || group_name->data[i] > 'Z') {
					// Not 'a' to 'z'
					if (group_name->data[i] < 'a' || group_name->data[i] > 'z') {
						// Invalid Name
						valid = false;
					}
				}
			}
		}
	}
	// Return Result
	return valid;
}

u64 join32(u32 num1, u32 num2){
	return (u64)num2 << 32 | num1;
}

void split64(u64 num, int buff[]){
	int num1 = (int)(num&firstMask);
	int num2 = (int)((num&secondMask) >> 32);
	buff[0] = num1;
	buff[1] = num2;
}

const char* getMatchingEventStr(int code) {
	const char *buf = NULL;
	switch (code) {
	case PSP_ADHOC_MATCHING_EVENT_HELLO:
		buf = "HELLO"; break;
	case PSP_ADHOC_MATCHING_EVENT_REQUEST:
		buf = "JOIN"; break;
	case PSP_ADHOC_MATCHING_EVENT_LEAVE:
		buf = "LEAVE"; break;
	case PSP_ADHOC_MATCHING_EVENT_DENY:
		buf = "REJECT"; break;
	case PSP_ADHOC_MATCHING_EVENT_CANCEL:
		buf = "CANCEL"; break;
	case PSP_ADHOC_MATCHING_EVENT_ACCEPT:
		buf = "ACCEPT"; break;
	case PSP_ADHOC_MATCHING_EVENT_ESTABLISHED:
		buf = "ESTABLISHED"; break;
	case PSP_ADHOC_MATCHING_EVENT_TIMEOUT:
		buf = "TIMEOUT"; break;
	case PSP_ADHOC_MATCHING_EVENT_ERROR:
		buf = "ERROR"; break;
	case PSP_ADHOC_MATCHING_EVENT_BYE:
		buf = "DISCONNECT"; break;
	case PSP_ADHOC_MATCHING_EVENT_DATA:
		buf = "DATA"; break;
	case PSP_ADHOC_MATCHING_EVENT_DATA_ACK:
		buf = "DATA_ACK"; break;
	case PSP_ADHOC_MATCHING_EVENT_DATA_TIMEOUT:
		buf = "DATA_TIMEOUT"; break;
	case PSP_ADHOC_MATCHING_EVENT_INTERNAL_PING:
		buf = "INTERNAL_PING"; break;
	default:
		buf = "UNKNOWN";
	}
	return buf;
}

const char* getMatchingOpcodeStr(int code) {
	const char *buf = NULL;
	switch (code) {
	case PSP_ADHOC_MATCHING_PACKET_PING:
		buf = "PING"; break;
	case PSP_ADHOC_MATCHING_PACKET_HELLO:
		buf = "HELLO"; break;
	case PSP_ADHOC_MATCHING_PACKET_JOIN:
		buf = "JOIN"; break;
	case PSP_ADHOC_MATCHING_PACKET_ACCEPT:
		buf = "ACCEPT"; break;
	case PSP_ADHOC_MATCHING_PACKET_CANCEL:
		buf = "CANCEL"; break;
	case PSP_ADHOC_MATCHING_PACKET_BULK:
		buf = "BULK"; break;
	case PSP_ADHOC_MATCHING_PACKET_BULK_ABORT:
		buf = "BULK_ABORT"; break;
	case PSP_ADHOC_MATCHING_PACKET_BIRTH:
		buf = "BIRTH"; break;
	case PSP_ADHOC_MATCHING_PACKET_DEATH:
		buf = "DEATH"; break;
	case PSP_ADHOC_MATCHING_PACKET_BYE:
		buf = "BYE"; break;
	default:
		buf = "UNKNOWN";
	}
	return buf;
}