usbloadergx/source/network/updater.cpp

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/****************************************************************************
* Updater for USB Loader GX
*
* HTTP operations
* Written by dhewg/bushing modified by dimok
****************************************************************************/
#include <stdio.h>
#include <string.h>
#include <ogcsys.h>
#include "prompts/PromptWindows.h"
#include "settings/cfg.h"
#include "main.h"
#include "http.h"
static s32 connection;
static bool updatechecked = false;
static bool networkinitialized = false;
static char IP[16];
static lwp_t networkthread = LWP_THREAD_NULL;
static bool networkHalt = true;
/****************************************************************************
* Initialize_Network
***************************************************************************/
void Initialize_Network(void) {
if(networkinitialized) return;
s32 result;
result = if_config(IP, NULL, NULL, true);
if(result < 0) {
networkinitialized = false;
return;
} else {
networkinitialized = true;
return;
}
}
/****************************************************************************
* Check if network was initialised
***************************************************************************/
bool IsNetworkInit(void)
{
return networkinitialized;
}
/****************************************************************************
* Get network IP
***************************************************************************/
char * GetNetworkIP(void)
{
return IP;
}
s32 network_request(const char * request)
{
char buf[1024];
char *ptr = NULL;
u32 cnt, size;
s32 ret;
/* Send request */
ret = net_send(connection, request, strlen(request), 0);
if (ret < 0)
return ret;
/* Clear buffer */
memset(buf, 0, sizeof(buf));
/* Read HTTP header */
for (cnt = 0; !strstr(buf, "\r\n\r\n"); cnt++)
if (net_recv(connection, buf + cnt, 1, 0) <= 0)
return -1;
/* HTTP request OK? */
if (!strstr(buf, "HTTP/1.1 200 OK"))
return -1;
/* Retrieve content size */
ptr = strstr(buf, "Content-Length:");
if (!ptr)
return -1;
sscanf(ptr, "Content-Length: %u", &size);
return size;
}
s32 network_read(u8 * buf, u32 len)
{
u32 read = 0;
s32 ret = -1;
/* Data to be read */
while (read < len) {
/* Read network data */
ret = net_read(connection, buf + read, len - read);
if (ret < 0)
return ret;
/* Read finished */
if (!ret)
break;
/* Increment read variable */
read += ret;
}
return read;
}
/****************************************************************************
* Download request
***************************************************************************/
s32 download_request(const char * url) {
//Check if the url starts with "http://", if not it is not considered a valid url
if(strncmp(url, "http://", strlen("http://")) != 0)
{
return -1;
}
//Locate the path part of the url by searching for '/' past "http://"
char *path = strchr(url + strlen("http://"), '/');
//At the very least the url has to end with '/', ending with just a domain is invalid
if(path == NULL)
{
return -1;
}
//Extract the domain part out of the url
int domainlength = path - url - strlen("http://");
if(domainlength == 0)
{
return -1;
}
char domain[domainlength + 1];
strncpy(domain, url + strlen("http://"), domainlength);
domain[domainlength] = '\0';
connection = GetConnection(domain);
if(connection < 0) {
return -1;
}
//Form a nice request header to send to the webserver
char header[strlen(path)+strlen(domain)+100];
sprintf(header, "GET %s HTTP/1.1\r\nHost: %s\r\nConnection: close\r\n\r\n", path, domain);
s32 filesize = network_request(header);
return filesize;
}
void CloseConnection() {
net_close(connection);
}
/****************************************************************************
* Update check
***************************************************************************/
int CheckUpdate()
{
if(!networkinitialized)
return -1;
int revnumber = 0;
int currentrev = atoi(SVN_REV);
struct block file = downloadfile("http://www.techjawa.com/usbloadergx/rev.txt");
char revtxt[10];
u8 i;
if(file.data != NULL) {
for(i=0; i<9 || i < file.size; i++)
revtxt[i] = file.data[i];
revtxt[i] = 0;
revnumber = atoi(revtxt);
free(file.data);
}
if(revnumber > currentrev)
return revnumber;
else
return -1;
}
/****************************************************************************
* HaltNetwork
***************************************************************************/
void HaltNetworkThread()
{
networkHalt = true;
// wait for thread to finish
while(!LWP_ThreadIsSuspended(networkthread))
usleep(100);
}
/****************************************************************************
* ResumeNetworkThread
***************************************************************************/
void ResumeNetworkThread()
{
networkHalt = false;
LWP_ResumeThread(networkthread);
}
/*********************************************************************************
* Networkthread for background network initialize and update check with idle prio
*********************************************************************************/
static void * networkinitcallback(void *arg)
{
Initialize_Network();
if(networkinitialized == true && updatechecked == false) {
if(CheckUpdate() > 0) {
/** Here we can enter the update function later **
** when network problem is solved **/
WindowPrompt("Update available",0,"OK",0,0,0);
}
updatechecked = true;
}
return NULL;
}
/****************************************************************************
* InitNetworkThread with priority 0 (idle)
***************************************************************************/
void InitNetworkThread()
{
LWP_CreateThread (&networkthread, networkinitcallback, NULL, NULL, 0, 0);
}
/****************************************************************************
* ShutdownThread
***************************************************************************/
void ShutdownNetworkThread()
{
LWP_JoinThread (networkthread, NULL);
networkthread = LWP_THREAD_NULL;
}