From 7e072c395faa9a7d5a55b8f7afa9e6385a7cd065 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9D=8E=E9=80=9A=E6=B4=B2?= <carter.li@eoitek.com>
Date: Tue, 18 Apr 2023 18:27:25 +0800
Subject: [PATCH] Network (Linux): add support

---
 CMakeLists.txt                          |   2 +
 src/detection/network/network_linux.c   | 111 ++++++++++++++++++++++++
 src/detection/network/network_windows.c |   2 +-
 3 files changed, 114 insertions(+), 1 deletion(-)
 create mode 100644 src/detection/network/network_linux.c

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 56db7ca45..3febd2918 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -346,6 +346,7 @@ if(LINUX)
         src/detection/gamepad/gamepad_linux.c
         src/detection/media/media_linux.c
         src/detection/memory/memory_linux.c
+        src/detection/network/network_linux.c
         src/detection/opengl/opengl_linux.c
         src/detection/os/os_linux.c
         src/detection/packages/packages_linux.c
@@ -386,6 +387,7 @@ elseif(ANDROID)
         src/detection/gamepad/gamepad_nosupport.c
         src/detection/media/media_nosupport.c
         src/detection/memory/memory_linux.c
+        src/detection/network/network_linux.c
         src/detection/opengl/opengl_linux.c
         src/detection/os/os_android.c
         src/detection/packages/packages_linux.c
diff --git a/src/detection/network/network_linux.c b/src/detection/network/network_linux.c
new file mode 100644
index 000000000..07c4ccc8d
--- /dev/null
+++ b/src/detection/network/network_linux.c
@@ -0,0 +1,111 @@
+#include "common/io/io.h"
+#include "detection/network/network.h"
+
+#include <net/if.h>
+#include <linux/if_arp.h>
+
+const char* ffDetectNetwork(FFinstance* instance, FFlist* result)
+{
+    FF_STRBUF_AUTO_DESTROY sbType;
+    ffStrbufInit(&sbType);
+
+    struct if_nameindex* infs = if_nameindex();
+    if(!infs)
+        return "if_nameindex() failed";
+
+    FF_STRBUF_AUTO_DESTROY path;
+    ffStrbufInit(&path);
+
+    FF_STRBUF_AUTO_DESTROY fileContent;
+    ffStrbufInit(&fileContent);
+
+    for(struct if_nameindex* i = infs; !(i->if_index == 0 && i->if_name == NULL); ++i)
+    {
+        if (strcmp(i->if_name, "lo") == 0)
+            continue;
+
+        ffStrbufSetF(&path, "/sys/class/net/%s/operstate", i->if_name);
+        if (!ffReadFileBuffer(path.chars, &fileContent))
+            continue;
+
+        bool isUp = ffStrbufEqualS(&fileContent, "up");
+        if (!isUp && !instance->config.networkAll)
+            continue;
+
+        ffStrbufSetF(&path, "/sys/class/net/%s/type", i->if_name);
+        if (!ffReadFileBuffer(path.chars, &fileContent))
+            continue;
+
+        const char* strType = NULL;
+        switch (ffStrbufToUInt16(&fileContent, 0))
+        {
+            case ARPHRD_ETHER:
+            case ARPHRD_EETHER:
+                strType = "Ethernet";
+                break;
+            case ARPHRD_AX25:
+                strType = "AX25";
+                break;
+            case ARPHRD_PRONET:
+                strType = "TokenRing";
+                break;
+            case ARPHRD_CHAOS:
+                strType = "Chaosnet";
+                break;
+            case ARPHRD_IEEE802:
+                strType = "IEEE802";
+                break;
+            case ARPHRD_ARCNET:
+                strType = "ARCnet";
+                break;
+            case ARPHRD_APPLETLK:
+                strType = "APPLEtalk";
+                break;
+            case ARPHRD_DLCI:
+                strType = "DLCI";
+                break;
+            case ARPHRD_ATM:
+                strType = "ATM";
+                break;
+            case ARPHRD_METRICOM:
+                strType = "Metricom";
+                break;
+            case ARPHRD_IEEE1394:
+                strType = "IEEE1394";
+                break;
+            case ARPHRD_EUI64:
+                strType = "EUI64";
+                break;
+            case ARPHRD_INFINIBAND:
+                strType = "InfiniBand";
+                break;
+            default:
+                strType = "Other";
+                break;
+        }
+
+        if (instance->config.networkType.length && !ffStrbufContainIgnCaseS(&instance->config.networkType, strType))
+            continue;
+
+        FFNetworkResult* item = (FFNetworkResult*) ffListAdd(result);
+        ffStrbufInitS(&item->type, strType);
+        ffStrbufInitS(&item->name, i->if_name);
+        ffStrbufInit(&item->address);
+        item->mtu = 0;
+        item->on = isUp;
+
+        ffStrbufSetF(&path, "/sys/class/net/%s/address", i->if_name);
+        ffReadFileBuffer(path.chars, &item->address);
+
+        ffStrbufSetF(&path, "/sys/class/net/%s/mtu", i->if_name);
+        if (ffReadFileBuffer(path.chars, &fileContent))
+            item->mtu = (int32_t) ffStrbufToUInt16(&fileContent, 0);
+    }
+
+    if_freenameindex(infs);
+
+    if (result->length == 0)
+        return "No network interfaces found";
+
+    return NULL;
+}
diff --git a/src/detection/network/network_windows.c b/src/detection/network/network_windows.c
index f8de12009..741f8fddd 100644
--- a/src/detection/network/network_windows.c
+++ b/src/detection/network/network_windows.c
@@ -55,7 +55,7 @@ const char* ffDetectNetwork(FFinstance* instance, FFlist* result)
                 strType = "Ethernet";
                 break;
             case IF_TYPE_ISO88025_TOKENRING:
-                strType = "ISO88025";
+                strType = "TokenRing";
                 break;
             case IF_TYPE_PPP:
                 strType = "PPP";