From 349e80764978dcf2b0a9d095cd6f13d078133238 Mon Sep 17 00:00:00 2001
From: study-faraphel <raphael.caron@etud.u-picardie.fr>
Date: Mon, 11 Nov 2024 10:02:50 +0100
Subject: [PATCH] fixed IPv6 mode not receiving loopback messages

---
 README.md               | 24 ++++++++++++++++++++----
 source/EventManager.cpp | 25 ++++++++++++++++---------
 2 files changed, 36 insertions(+), 13 deletions(-)

diff --git a/README.md b/README.md
index 5fbc7ad..820598d 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,22 @@
-## Dependencies
+## Installation
 
-apt
-```
-sudo apt install cmake pkg-config build-essential libmpg123-dev libssl-dev portaudio19-dev
+Debian
+```bash
+# Download
+sudo apt install -y git
+git clone https://git.faraphel.fr/study-faraphel/M2-PT-DRP
+cd M2-PT-DRP
+
+# Dependencies
+sudo apt install -y libmpg123-dev libssl-dev portaudio19-dev
+
+# Compile
+sudo apt install -y build-essential cmake ninja-build pkg-config
+cmake -S . -B build -G Ninja
+cmake --build build 
+cd build
+
+# Run
+./M2-PT-DRP --host ff02::1 --ipv6
 ```
+
diff --git a/source/EventManager.cpp b/source/EventManager.cpp
index 9d57779..7eb2c45 100644
--- a/source/EventManager.cpp
+++ b/source/EventManager.cpp
@@ -42,16 +42,16 @@ EventManager::EventManager(const std::string& address, const std::string& port,
     };
 
     // hints for the communication
-    addrinfo addressHints {};
-    addressHints.ai_family = useIpv6 ? AF_INET6 : AF_INET;
-    addressHints.ai_socktype = SOCK_DGRAM;
-    addressHints.ai_protocol = IPPROTO_UDP;
+    addrinfo broadcastAddressHints {};
+    broadcastAddressHints.ai_family = useIpv6 ? AF_INET6 : AF_INET;
+    broadcastAddressHints.ai_socktype = SOCK_DGRAM;
+    broadcastAddressHints.ai_protocol = IPPROTO_UDP;
 
     // create the client socket
     this->context.socket = socket(
-        addressHints.ai_family,
-        addressHints.ai_socktype,
-        addressHints.ai_protocol
+        broadcastAddressHints.ai_family,
+        broadcastAddressHints.ai_socktype,
+        broadcastAddressHints.ai_protocol
     );
 
     if (this->context.socket < 0)
@@ -73,17 +73,24 @@ EventManager::EventManager(const std::string& address, const std::string& port,
     if(const int error = getaddrinfo(
         address.c_str(),
         port.c_str(),
-        &addressHints,
+        &broadcastAddressHints,
         &context.broadcastAddressInfo
     ) != 0)
         throw std::runtime_error("Could not get the broadcast address: " + std::string(gai_strerror(error)));
 
+    // hints for the bind address
+    addrinfo anyAddressHints {};
+    anyAddressHints.ai_family = useIpv6 ? AF_INET6 : AF_INET;
+    anyAddressHints.ai_flags = AI_PASSIVE;
+    anyAddressHints.ai_socktype = SOCK_DGRAM;
+    anyAddressHints.ai_protocol = IPPROTO_UDP;
+
     // get the information for the broadcast local-link address
     addrinfo *anyAddressInfo;
     if(const int error = getaddrinfo(
         nullptr,
         port.c_str(),
-        &addressHints,
+        &anyAddressHints,
         &anyAddressInfo
     ) != 0)
         throw std::runtime_error("Could not get the any address: " + std::string(gai_strerror(error)));