From 4732f4233313a4150370c0b866335ef4eca3a026 Mon Sep 17 00:00:00 2001
From: lonkaars <loek@pipeframe.xyz>
Date: Mon, 29 Apr 2024 18:40:30 +0200
Subject: better packet sniffer

---
 makefile                        |  2 +-
 src/frontend/qt_sdl/LocalMP.cpp | 29 +++++++++++++++--------------
 2 files changed, 16 insertions(+), 15 deletions(-)

diff --git a/makefile b/makefile
index 930e85a..6ca562e 100644
--- a/makefile
+++ b/makefile
@@ -10,4 +10,4 @@ build/melonDS: build/build.ninja FORCE
 	@ninja -C build
 
 run: build/melonDS
-	@$<
+	@$< --boot always
diff --git a/src/frontend/qt_sdl/LocalMP.cpp b/src/frontend/qt_sdl/LocalMP.cpp
index 18d1b65..b90ff05 100644
--- a/src/frontend/qt_sdl/LocalMP.cpp
+++ b/src/frontend/qt_sdl/LocalMP.cpp
@@ -19,6 +19,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <sys/types.h>
 
 #ifdef __WIN32__
     #include <windows.h>
@@ -246,9 +247,9 @@ void SemReset(int num)
 
 bool Init()
 {
-    pcap_t* handle = pcap_open_dead(DLT_NULL, 1 << 16);
+    pcap_t* handle = pcap_open_dead(DLT_USER0, 1 << 16);
     char filename[80];
-    snprintf(filename, 79, "melon_instance_%d.pcap", InstanceID);
+    snprintf(filename, 79, "melon_%lu.pcap", time(NULL));
     dumper = pcap_dump_open(handle, filename);
 
     MPQueue = new QSharedMemory("melonNIFI");
@@ -397,6 +398,12 @@ void FIFORead(int fifo, void* buf, int len)
 
     if (fifo == 0) PacketReadOffset = offset;
     else           ReplyReadOffset = offset;
+
+    struct pcap_pkthdr p;
+    p.len = len;
+    p.caplen = len;
+    gettimeofday(&p.ts, NULL);
+    pcap_dump((u_char*) dumper, &p, (u_char*) buf);
 }
 
 void FIFOWrite(int fifo, void* buf, int len)
@@ -433,6 +440,12 @@ void FIFOWrite(int fifo, void* buf, int len)
 
     if (fifo == 0) header->PacketWriteOffset = offset;
     else           header->ReplyWriteOffset = offset;
+
+    struct pcap_pkthdr p;
+    p.len = len;
+    p.caplen = len;
+    gettimeofday(&p.ts, NULL);
+    pcap_dump((u_char*) dumper, &p, (u_char*) buf);
 }
 
 int SendPacketGeneric(u32 type, u8* packet, int len, u64 timestamp)
@@ -488,12 +501,6 @@ int SendPacketGeneric(u32 type, u8* packet, int len, u64 timestamp)
         }
     }
 
-    struct pcap_pkthdr p;
-    p.len = len;
-    p.caplen = len;
-    gettimeofday(&p.ts, NULL);
-    pcap_dump((u_char*) dumper, &p, packet);
-
     return len;
 }
 
@@ -545,12 +552,6 @@ int RecvPacketGeneric(u8* packet, bool block, u64* timestamp)
         if (timestamp) *timestamp = pktheader.Timestamp;
         MPQueue->unlock();
 
-        struct pcap_pkthdr p;
-        p.len = pktheader.Length;
-        p.caplen = pktheader.Length;
-        gettimeofday(&p.ts, NULL);
-        pcap_dump((u_char*) dumper, &p, packet);
-
         return pktheader.Length;
     }
 }
-- 
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