Add basic config file

Makefile

@@ -2,7 +2,7 @@ CXX=g++
 CXXFLAGS=-Wall -Wextra -Werror -pedantic -std=c++14 -O2
 CXXLIBS=-lpthread
 
-OBJS = Bytes.o main.o protocol.o neighbours.o packetParser.o
+OBJS = Bytes.o main.o protocol.o neighbours.o packetParser.o configFile.o
 TARGET = jeanhubert
 
 all: $(TARGET)

cfg

@@ -0,0 +1,2 @@
+id a0ae025e0df5f0a6
+bootstrap 2460e2b01bc8d704 ::ffff:81.194.27.155 1212

configFile.cpp

@@ -0,0 +1,90 @@
+/***************************************************************************
+ * By Théophile Bastian, 2017
+ * M1 Network course project at ENS Cachan, Juliusz Chroboczek.
+ * License: WTFPL v2 <http://www.wtfpl.net/>
+ **************************************************************************/
+
+#include "configFile.h"
+#include <fstream>
+#include <cstring>
+#include <cstdlib>
+using namespace std;
+
+ConfigFile::ConfigFile() {
+	selfId=0;
+	for(int i=0; i < 8; i++) {
+		selfId <<= 8;
+		selfId += rand() % 0xFF;
+	}
+}
+
+bool ConfigFile::read(const char* path) {
+	ifstream handle(path);
+	if(!handle.is_open())
+		return false;
+
+	while(handle.good()) {
+		string attr;
+		handle >> attr;
+
+		if(attr == "id") {
+			handle >> hex >> selfId >> dec;
+		}
+		else if(attr == "bootstrap") {
+			u16 port;
+			u64 id;
+			SockAddr addr;
+			memset(&addr, 0, sizeof(addr));
+			addr.sin6_family = AF_INET6;
+			string addrStr;
+
+			handle >> hex >> id >> dec;
+			handle >> addrStr;
+			handle >> port;
+
+			addr.sin6_port = htons(port);
+			if(inet_pton(AF_INET6, addrStr.c_str(), &(addr.sin6_addr)) != 1) {
+				//TODO proper log
+				fprintf(stderr, "Could not convert '%s' to IPv6 address\n",
+						addrStr.c_str());
+				continue;
+			}
+
+			bootstrapNodes.push_back(Neighbour(id, addr));
+		}
+		else if(attr.empty())
+			continue;
+		else {
+			//TODO proper log
+			fprintf(stderr, "Unknown configuration item: '%s'\n",
+					attr.c_str());
+			continue;
+		}
+	}
+	handle.close();
+
+	return true;
+}
+
+bool ConfigFile::write(const char* path) {
+	ofstream handle(path, ofstream::out | ofstream::trunc);
+
+	if(!handle.is_open())
+		return false;
+
+	handle << "id " << hex << selfId << dec << '\n';
+	for(Neighbour nei : bootstrapNodes) {
+		char addr[54];
+		if(inet_ntop(AF_INET6, &nei.addr.sin6_addr, addr, 54) == NULL) {
+			perror("Could not convert IPv6 back to string");
+			continue;
+		}
+		handle << "bootstrap " << hex << nei.id << dec << ' '
+			<< addr << ' ' << ntohs(nei.addr.sin6_port) << '\n';
+	}
+
+	handle.close();
+
+	return true;
+}
+

configFile.h

@@ -0,0 +1,33 @@
+/***************************************************************************
+ * By Théophile Bastian, 2017
+ * M1 Network course project at ENS Cachan, Juliusz Chroboczek.
+ * License: WTFPL v2 <http://www.wtfpl.net/>
+ **************************************************************************/
+
+#pragma once
+
+#include <vector>
+#include <string>
+#include "data.h"
+
+class ConfigFile {
+	public:
+		ConfigFile();
+
+		bool read(const char* path);
+		bool write(const char* path);
+
+		u64 getSelfId() const { return selfId; }
+		void setSelfId(u64 id) { selfId = id; }
+		/** Self id */
+
+		const std::vector<Neighbour>& getBootstrapNodes() const {
+			return bootstrapNodes;
+		};
+		/** Bootstrap nodes. No setter: wouldn't be useful. */
+
+	private:
+		u64 selfId;
+		std::vector<Neighbour> bootstrapNodes;
+};
+

main.cpp

@@ -9,54 +9,51 @@
 #include "nw_constants.h"
 #include "neighbours.h"
 #include "packetParser.h"
+#include "configFile.h"
 #include <cstring>
 #include <cstdio>
 #include <cstdlib>
 #include <ctime>
 #include <unistd.h>
 
-int main(int /*argc*/, char** /*argv*/) {
+int main(int argc, char** argv) {
+	bool hasConfig = false;
+	char* configFilePath = nullptr;
+	if(argc > 1) {
+		hasConfig = true;
+		configFilePath = argv[1];
+	}
+
 	srand(time(NULL)+42);
 
+	ConfigFile cfg;
+	if(hasConfig) {
+		if(!cfg.read(configFilePath) || !cfg.write(configFilePath)) {
+			fprintf(stderr, "Could not read/write on '%s'.\n", configFilePath);
+			exit(1);
+		}
+	}
+
 	SockAddr addr;
 	memset(&addr, 0, sizeof(addr));
 	addr.sin6_family = AF_INET6;
 	addr.sin6_port = htons(csts::DEFAULT_PORT);
 
-	u64 myId=0;
-	for(int i=0; i < 8; i++) {
-		myId <<= 8;
-		myId += rand() % (1<<8);
-	}
+	printf("%lX\n", cfg.getSelfId());
 
-	printf("%lu\n", myId);
-
-	SockAddr jch_addr;
-	memset(&jch_addr, 0, sizeof(jch_addr));
-	jch_addr.sin6_family = AF_INET6;
-	jch_addr.sin6_port = htons(1212);
-	int rc = inet_pton(AF_INET6, "::FFFF:81.194.27.155", &jch_addr.sin6_addr);
-	if(rc != 1) {
-		if(rc == 0)
-			fprintf(stderr, "Address uses an invalid format.\n");
-		else
-			perror("Cannot convert JCh address");
-		exit(1);
-	}
-	u64 jch_id = 0x43e3a5e0;
-	jch_id <<= 32;
-	jch_id += 0x10095a0f;
-
-	Protocol proto(addr, myId);
+	Protocol proto(addr, cfg.getSelfId());
 
 	Neighbours neighboursManager(&proto);
-	neighboursManager.addPotentialNei(Neighbour(jch_id, jch_addr));
+	for(const Neighbour& nei : cfg.getBootstrapNodes()) {
+		char addr[54];
+		inet_ntop(AF_INET6, &nei.addr.sin6_addr, addr, 54);
+		printf("Neigh: %lX [%s]:%hu\n", nei.id, addr,
+				ntohs(nei.addr.sin6_port));
+		neighboursManager.addPotentialNei(nei);
+	}
 
 	PacketParser pckParser(&neighboursManager, &proto);
 
-//	proto.sendEmpty(loc_addr);
-//	proto.sendEmpty(jch_addr);
-
 	while(true) {
 		neighboursManager.fullUpdate();
 
@@ -69,20 +66,6 @@ int main(int /*argc*/, char** /*argv*/) {
 		sleep(2);
 	}
 
-	/*
-	SockAddr loc_addr;
-	memset(&loc_addr, 0, sizeof(loc_addr));
-	loc_addr.sin6_family = AF_INET6;
-	loc_addr.sin6_port = htons(1212);
-	rc = inet_pton(AF_INET6, "::FFFF:127.0.0.1", &loc_addr.sin6_addr);
-	if(rc != 1) {
-		fprintf(stderr, "Error.");
-		exit(1);
-	}
-
-
-	while(true);
-	*/
 	return 0;
 }