Wii can now send a POST request to a website

The extractor now uses libfat to read a config file off the root of the
SD card, a model for which is included in the repository. The extractor
is capable of negotiating an HTTPS connection, but it requires a
download of the target site's root CA certificate to be on the SD card
and pointed at by the config file. TLS/SSL functionality is provided by
wolfSSL. I had to make a couple of minor changes to wolfSSL for it to
work properly, and those changes are located in the devkitpro branch of
my fork, hatkirby/wolfssl.

The Wii program now arranges some of the information that the GBA sends
it into a JSON object, which is then sent off (along with some
authentication information from the config file) to the endpoint defined
in the config file. The code used to maintain the network connection is
from the WiiTweet project, which was licensed under the GPL. Some of the
code used to send the HTTP request also comes from said project.

1 files changed, 161 insertions, 0 deletions

@@ -0,0 +1,161 @@
+/*
+ * Copyright (C) 2008 Tantric
+ * Copyright (C) 2012 Pedro Aguiar
+ * Copyright (C) 2017 hatkirby
+ *
+ * Originally part of the WiiTweet project, which was distributed under the
+ * GPL.
+ */
+#include "netinf.h"
+#include <gccore.h>
+#include <network.h>
+#include <ogc/lwp_watchdog.h>
+#include <sys/errno.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdio.h>
+
+static bool networkInit = false;
+static lwp_t networkThread = LWP_THREAD_NULL;
+static u8 netStack[32768] ATTRIBUTE_ALIGN(32);
+static char wiiIP[16] = {0};
+static bool netHalt = false;
+
+static void* interface(void* arg)
+{
+  static bool prevInit = false;
+
+  while (!netHalt)
+  {
+    int retry = 5;
+    int result = -1;
+
+    while ((retry > 0) && (!netHalt))
+    {
+      if (prevInit)
+      {
+        net_deinit();
+
+        for (int i=0; (i<400) && !netHalt; i++)
+        {
+          if (net_get_status() != -EBUSY)
+          {
+            usleep(2000);
+            net_wc24cleanup();
+            prevInit = false;
+            usleep(20000);
+
+            break;
+          }
+
+          usleep(20000);
+        }
+      }
+
+      usleep(2000);
+
+      if (net_init_async(NULL, NULL))
+      {
+        sleep(1);
+
+        retry--;
+
+        continue;
+      }
+
+      result = net_get_status();
+      for (int wait = 400; (wait > 0) && (result == -EBUSY) && !netHalt; wait++)
+      {
+        usleep(20000);
+
+        result = net_get_status();
+      }
+
+      if (result == 0)
+      {
+        break;
+      }
+
+      retry--;
+
+      usleep(2000);
+    }
+
+    if (result == 0)
+    {
+      struct in_addr hostip;
+      hostip.s_addr = net_gethostip();
+
+      if (hostip.s_addr)
+      {
+        strcpy(wiiIP, inet_ntoa(hostip));
+        networkInit = true;
+        prevInit = true;
+      }
+    }
+
+    if (!netHalt)
+    {
+      LWP_SuspendThread(networkThread);
+    }
+  }
+
+  return NULL;
+}
+
+static void startNetworkThread()
+{
+  netHalt = false;
+
+  if (networkThread == LWP_THREAD_NULL)
+  {
+    LWP_CreateThread(&networkThread, interface, NULL, netStack, 8192, 40);
+  } else {
+    LWP_ResumeThread(networkThread);
+  }
+}
+
+static void stopNetworkThread()
+{
+  if ((networkThread == LWP_THREAD_NULL)
+    || (!LWP_ThreadIsSuspended(networkThread)))
+  {
+    return;
+  }
+
+  netHalt = true;
+
+  LWP_ResumeThread(networkThread);
+  LWP_JoinThread(networkThread, NULL);
+
+  networkThread = LWP_THREAD_NULL;
+}
+
+bool initializeNetwork()
+{
+  stopNetworkThread();
+
+  if (networkInit && (net_gethostip() > 0))
+  {
+    return true;
+  }
+
+  networkInit = false;
+
+  printf("Initializing network...\n");
+
+  u64 start = gettime();
+  startNetworkThread();
+
+  while (!LWP_ThreadIsSuspended(networkThread))
+  {
+    usleep(50 * 1000);
+
+    if (diff_sec(start, gettime()) > 10)
+    {
+      break;
+    }
+  }
+
+  return networkInit;
+}