From d5f27ecb0ea61a85da5dcb9178ea589bdd65c174 Mon Sep 17 00:00:00 2001
From: Jeff Becker <ampernand@gmail.com>
Date: Sun, 18 Dec 2016 12:28:32 -0500
Subject: [PATCH] fix termination crash

---
 SAM.cpp | 56 ++++++++++++++++++++++++++++++++++----------------------
 SAM.h   |  2 ++
 2 files changed, 36 insertions(+), 22 deletions(-)

diff --git a/SAM.cpp b/SAM.cpp
index ebb90aeb..5b21af51 100644
--- a/SAM.cpp
+++ b/SAM.cpp
@@ -404,6 +404,7 @@ namespace client
 		{
 			m_SocketType = eSAMSocketTypeAcceptor;
 			m_Session->AddSocket (shared_from_this ());
+			SendMessageReply (SAM_STREAM_STATUS_OK, strlen(SAM_STREAM_STATUS_OK), false);
 		}	
 		else
 			SendMessageReply (SAM_STREAM_STATUS_INVALID_ID, strlen(SAM_STREAM_STATUS_INVALID_ID), true);
@@ -413,7 +414,6 @@ namespace client
 	{
 		if(stream) {
 			m_SocketType = eSAMSocketTypeStream;
-			SendMessageReply (SAM_STREAM_STATUS_OK, strlen(SAM_STREAM_STATUS_OK), false);
 			HandleI2PAccept(stream);
 		} else {
 			SendMessageReply (SAM_STREAM_STATUS_I2P_ERROR, strlen(SAM_STREAM_STATUS_I2P_ERROR), true);
@@ -713,7 +713,6 @@ namespace client
 		
 	SAMSession::~SAMSession ()
 	{
-		CloseStreams();
 		i2p::client::context.DeleteLocalDestination (localDestination);
 	}
 
@@ -736,17 +735,30 @@ namespace client
 		m_BacklogPumper.async_wait(std::bind(&SAMSession::HandlePumpBacklog, this, std::placeholders::_1));
 	}
 
+	std::shared_ptr<SAMSocket> SAMSession::FindAcceptor()
+	{
+		for (auto & sock : m_Sockets) {
+			auto t = sock->GetSocketType();
+			if(t == eSAMSocketTypeAcceptor) {
+				return sock;
+			}
+		}
+		return nullptr;
+	}
+
 	void SAMSession::HandlePumpBacklog(const boost::system::error_code & ec)
 	{
 		if(ec) return;
-
-		std::unique_lock<std::mutex> lock(m_SocketsMutex);
-		for(auto & stream : m_Backlog) {
-			for (auto & sock : m_Sockets) {
-				auto t = sock->GetSocketType();
-				if(t == eSAMSocketTypeAcceptor) {
-					sock->Accept(stream);
-					break;
+		{
+			std::unique_lock<std::mutex> lock(m_SocketsMutex);
+			auto itr = m_Backlog.begin();
+			while(itr != m_Backlog.end()) {
+				auto sock = FindAcceptor();
+				if (sock) {
+					sock->Accept(*itr);
+					itr = m_Backlog.erase(itr);
+				} else {
+					++itr;
 				}
 			}
 		}
@@ -755,18 +767,18 @@ namespace client
 
 	void SAMSession::CloseStreams ()
 	{
-		{
-			std::lock_guard<std::mutex> lock(m_SocketsMutex);
-			for (auto& sock : m_Sockets) {
-				sock->CloseStream();
-			}
-			for(auto & stream : m_Backlog) {
-				stream->Close();
-			}
-		}
-		// XXX: should this be done inside locked parts?
-		m_Sockets.clear();
-		m_Backlog.clear();
+		localDestination->GetService().post([&] () {
+				std::lock_guard<std::mutex> lock(m_SocketsMutex);
+				for (auto& sock : m_Sockets) {
+					sock->CloseStream();
+				}
+				for(auto & stream : m_Backlog) {
+						stream->Close();
+				}
+				// XXX: should this be done inside locked parts?
+				m_Sockets.clear();
+				m_Backlog.clear();
+			});
 	}
 
 	SAMBridge::SAMBridge (const std::string& address, int port):
diff --git a/SAM.h b/SAM.h
index 26c6ea29..810a1bb0 100644
--- a/SAM.h
+++ b/SAM.h
@@ -169,6 +169,8 @@ namespace client
 
 		void AcceptI2P(std::shared_ptr<i2p::stream::Stream> stream);
 
+		std::shared_ptr<SAMSocket> FindAcceptor();
+
 		void PumpBacklog();
 		void HandlePumpBacklog(const boost::system::error_code & ec);