From 8386482fb9ee76bcfa79ba11915a9bcdf9745948 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Roman=20Smr=C5=BE?= <roman.smrz@seznam.cz>
Date: Sun, 7 May 2023 22:28:12 +0200
Subject: Server function to manually add peer

---
 src/main.cpp    | 11 +++++++++++
 src/network.cpp | 42 ++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 53 insertions(+)

(limited to 'src')

diff --git a/src/main.cpp b/src/main.cpp
index 63b78dd..f33bcc4 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -328,6 +328,16 @@ void stopServer(const vector<string> &)
 	server.reset();
 }
 
+void peerAdd(const vector<string> & args)
+{
+	if (args.size() == 1)
+		server->addPeer(args.at(0));
+	else if (args.size() == 2)
+		server->addPeer(args.at(0), args.at(1));
+	else
+		throw invalid_argument("usage: peer-add <node> [<port>]");
+}
+
 void sharedStateGet(const vector<string> &)
 {
 	ostringstream ss;
@@ -530,6 +540,7 @@ vector<Command> commands = {
 	{ "create-identity", createIdentity },
 	{ "start-server", startServer },
 	{ "stop-server", stopServer },
+	{ "peer-add", peerAdd },
 	{ "shared-state-get", sharedStateGet },
 	{ "shared-state-wait", sharedStateWait },
 	{ "watch-local-identity", watchLocalIdentity },
diff --git a/src/network.cpp b/src/network.cpp
index ecf7ca0..226095b 100644
--- a/src/network.cpp
+++ b/src/network.cpp
@@ -11,6 +11,9 @@
 #include <arpa/inet.h>
 #include <ifaddrs.h>
 #include <net/if.h>
+#include <netdb.h>
+#include <sys/socket.h>
+#include <sys/types.h>
 #include <unistd.h>
 
 using std::get;
@@ -70,6 +73,43 @@ PeerList & Server::peerList() const
 	return p->plist;
 }
 
+void Server::addPeer(const string & node) const
+{
+	return addPeer(node, to_string(Priv::discoveryPort));
+}
+
+void Server::addPeer(const string & node, const string & service) const
+{
+	addrinfo hints {};
+	hints.ai_flags = AI_V4MAPPED | AI_ADDRCONFIG;
+	hints.ai_family = AF_INET6;
+	hints.ai_socktype = SOCK_DGRAM;
+	addrinfo *aptr;
+
+	int r = getaddrinfo(node.c_str(), service.c_str(), &hints, &aptr);
+	if (r != 0)
+		throw runtime_error(string("Server::addPeer: getaddrinfo failed: ") + gai_strerror(r));
+
+	unique_ptr<addrinfo, void(*)(addrinfo*)> result { aptr, &freeaddrinfo };
+
+	for (addrinfo * rp = result.get(); rp != nullptr; rp = rp->ai_next) {
+		if (rp->ai_family == AF_INET6) {
+			Peer & peer = p->getPeer(*(sockaddr_in6 *)rp->ai_addr);
+
+			vector<TransportHeader::Item> header;
+			{
+				shared_lock lock(p->selfMutex);
+				header.push_back(TransportHeader::Item {
+					TransportHeader::Type::AnnounceSelf, *p->self.ref() });
+			}
+			peer.send(header, {}, false);
+			return;
+		}
+	}
+
+	throw runtime_error("Server::addPeer: no suitable peer address found");
+}
+
 
 Peer::Peer(const shared_ptr<Priv> & p): p(p) {}
 Peer::~Peer() = default;
@@ -424,6 +464,8 @@ bool Server::Priv::isSelfAddress(const sockaddr_in6 & paddr)
 
 Server::Peer & Server::Priv::getPeer(const sockaddr_in6 & paddr)
 {
+	scoped_lock lock(dataMutex);
+
 	for (auto & peer : peers)
 		if (memcmp(&peer->addr, &paddr, sizeof paddr) == 0)
 			return *peer;
-- 
cgit v1.2.3