rename

CMakeLists.txt

@@ -1,10 +1,12 @@
-cmake_minimum_required(VERSION 3.26)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.26)
-PROJECT(worlioftp)
+PROJECT(digftp)
 
 SET(CMAKE_CXX_STANDARD 20)
-
+SET(CMAKE_CXX_STANDARD_REQUIRED True)
-#SET(CMAKE_VERBOSE_MAKEFILE ON)
+SET(CMAKE_CXX_FLAGS "-O3")
-
+SET(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR})
-#ADD_DEFINITIONS(-Wall -O2)
+INCLUDE_DIRECTORIES(${CMAKE_BINARY_DIR})
 
 ADD_SUBDIRECTORY(src)
+FILE(COPY conf DESTINATION ${CMAKE_BINARY_DIR})
+INSTALL(TARGETS ${PROJECT_NAME} RUNTIME DESTINATION bin)

conf/ftp.conf

@@ -0,0 +1,15 @@
+[main]
+server_name=My FTP Server
+motd_file=motd
+auth_engine=noauth
+[net]
+listen_address=127.0.0.1
+control_port=21
+max_clients=255
+[noauth]
+user_root=/home/%u/
+chroot=1
+[passdb]
+file=conf/passdb
+user_root=/home/%u/
+case_sensitive=1

conf/motd

@@ -0,0 +1 @@
+Welcome to my FTP server.

conf/passdb

@@ -0,0 +1 @@
+anonymous:anonymous@

conf/worlio-ftp.conf

@@ -1,14 +0,0 @@
-[general]
-name=Worlio FTP
-contact=admin@localhost
-location=US
-motd=Welcome!
-version=0.0
-path=/data/ftp-test
-
-[network]
-address=0.0.0.0
-port=21
-data-port=20
-active=true
-passive=true

src/CMakeLists.txt

@@ -1,4 +1,4 @@
 add_executable(
-	worlioftp
+	${PROJECT_NAME}
 	main.cpp
 )

src/auth.h

@@ -0,0 +1,27 @@
+#ifndef AUTHMETHODS_H
+#define AUTHMETHODS_H
+#include <string>
+
+class Auth {
+public:
+	Auth() {};
+
+	virtual void setOptions(ConfigSection* options) {};
+	
+	virtual bool isChroot() { return false; };
+	
+	virtual bool check(std::string username, std::string password) { return false; };
+	
+	virtual std::string getUserDirectory(std::string username) { return ""; };
+};
+
+#include "auth/noauth.h"
+#include "auth/passdb.h"
+
+Auth* getAuthByName(std::string name) {
+	if (name == "noauth") return new NoAuth();
+	if (name == "passdb") return new PassdbAuth();
+	return new Auth();
+}
+
+#endif

src/auth/noauth.h

@@ -0,0 +1,32 @@
+#ifndef _AUTH_NOAUTH
+#define _AUTH_NOAUTH
+#include "../util.h"
+
+class NoAuth : public Auth {
+public:
+	NoAuth() {};
+
+	void setOptions(ConfigSection* options) {
+		this->options = options;
+	};
+	
+	ConfigSection* getOptions() {
+		return options;
+	}
+	
+	bool isChroot() {
+		return options->getInt("chroot", 1) == 1;
+	};
+	
+	bool check(std::string username, std::string password) { return true; };
+	
+	std::string getUserDirectory(std::string username) {
+		std::string authDir = options->getValue("user_root", "/home/%u/");
+		authDir = replace(authDir, "%u", username);
+		return authDir;
+	};
+private:
+	ConfigSection* options;
+};
+
+#endif

src/auth/passdb.h

@@ -0,0 +1,43 @@
+#ifndef _AUTH_PASSDB
+#define _AUTH_PASSDB
+#include "../util.h"
+
+class PassdbAuth : public Auth {
+public:
+	PassdbAuth() {};
+
+	void setOptions(ConfigSection* options) {
+		std::ifstream file(options->getValue("file", "passdb"));
+		std::string line;
+		while (std::getline(file, line)) {
+			if (line.length() == 0) continue;
+			else if (line.rfind("#", 0) == 0) continue;
+			else {
+				std::string username = line.substr(0, line.find(":"));
+				if (options->getInt("case_sensitive", 1) != 0)
+					username = toLower(username);
+				userlist[username] = line.substr(line.find(":")+1, line.length());
+			}
+		}
+		userRoot = options->getValue("user_root", "/home/%u/");
+	};
+	
+	bool isChroot() { return true; };
+	
+	bool check(std::string username, std::string password) {
+		if (userlist.find(username) == userlist.end()) return false;
+		if (userlist[username] != password) return false;
+		return true;
+	};
+	
+	std::string getUserDirectory(std::string username) {
+		std::string authDir = userRoot;
+		authDir = replace(authDir, "%u", username);
+		return authDir;
+	};
+private:
+	std::map<std::string, std::string> userlist;
+	std::string userRoot;
+};
+
+#endif

src/client.cpp

@@ -10,6 +10,7 @@
 #include <time.h>
 #include <thread>
 
+#include "main.h"
 #include "server.h"
 #include "filer.cpp"
 #include "util.h"
@@ -30,7 +31,7 @@ public:
 
 	Client(int &_sock) {
 		control_sock = _sock;
-		submit(230, "Init");
+		submit(230, config->getValue("main", "server_name", "digFTP Server"));
 	};
 	
 	int receive(std::string cmd, std::string argstr) {
@@ -44,29 +45,17 @@ public:
 				submit(257, "'"+filer->cwd.string()+"'");
 			} else if (cmd == "CWD") {
 				int rc = filer->traverse(argstr);
-				if (rc == 0) {
+				if (rc == 0) submit(250, "OK");
-					submit(250, "OK");
+				else submit(431, "No such directory");
-				} else if (rc == -1) {
-					submit(500, "Not found!");
-				} else {
-					submit(500, std::to_string(rc));
-				}
 			} else if (cmd == "CDUP") {
 				int rc = filer->traverse("..");
-				if (rc == 0) {
+				if (rc == 0) submit(250, "OK");
-					submit(250, "OK");
+				else submit(431, "No such directory");
-				} else if (rc == -1) {
-					submit(500, "Not found!");
-				} else {
-					submit(500, std::to_string(rc));
-				}
 			} else if (cmd == "MKD") {
 				int rc = filer->createDirectory(argstr);
-				if (rc == 0) {
+				if (rc == 0) submit(257, "\""+filer->relPath(argstr).string()+"\" directory created");
-					submit(250, "OK");
+				else if (rc == -1) submit(521, "Directory already exists");
-				} else {
+				else submit(550, "Access Denied");
-					submit(500, std::to_string(rc));
-				}
 			} else if (cmd == "TYPE") {
 				sscanf(argstr.c_str(), "%c", &(filer->type));
 				submit(226, "OK");
@@ -104,10 +93,7 @@ public:
 				}
 				
 				if (getsockname(data_fd, (struct sockaddr *)&data_address, &datalen) == 0) {
-					//memcpy(&netaddr[0], &data_address.sin_addr, 4);
+					sscanf(config->getValue("net", "listen_address", "127.0.0.1").c_str(), "%d.%d.%d.%d", &netaddr[0], &netaddr[1], &netaddr[2], &netaddr[3]);
-					netaddr[0] = 127;
-					netaddr[1] = netaddr[2] = 0;
-					netaddr[3] = 1;
 					dataport = ntohs(data_address.sin_port);
 					memcpy(&netport[0], &dataport, 2);
 					printf("[i] D(%i) PASV initialized: %u.%u.%u.%u:%u\n", data_fd, netaddr[0], netaddr[1], netaddr[2], netaddr[3], dataport);
@@ -120,7 +106,7 @@ public:
 				char* pasvok;
 				asprintf(
 					&pasvok,
-					"Entering Passive Mode (%u,%u,%u,%u,%u,%u)",
+					"Entering Passive Mode (%u,%u,%u,%u,%u,%u).",
 					netaddr[0],
 					netaddr[1],
 					netaddr[2],
@@ -135,7 +121,6 @@ public:
 				if ((data_sock = accept(data_fd, NULL, NULL)) >= 0) {
 					printf("[i] D(%i) PASV accepted: %i\n", data_fd, data_sock);
 					state = 2;
-					//submit(200, "OK");
 				} else {
 					perror("accept() failed");
 					submit(425, "Unknown Error");
@@ -177,7 +162,7 @@ public:
 			} else if (cmd == "DELE" || cmd == "RMD") {
 				int ret = filer->deleteFile(argstr);
 				if (ret == 0) {
-					submit(226, "OK");
+					submit(250, "OK");
 				} else {
 					submit(550, "Access Denied "+std::to_string(ret));
 				}
@@ -197,13 +182,12 @@ public:
 					if (fd.ecode == 0) {
 						submit(150, "Transferring");
 						data_submit(fd.data, fd.size);
+						free(fd.data);
+						submit(226, "OK");
 					} else {
 						if (fd.ecode == -3) submit(550, "I refuse to transmit in ASCII mode!");
 						else submit(550, "Access Denied");
 					}
-					// Segfault on freeing ASCII data, memory leak on binary.
-					if (filer->type != 'A') free(fd.data);
-					submit(226, "OK");
 				} else if (cmd == "STOR") {
 					unsigned char inbuf[BUFFERSIZE] = {0};
 					submit(150, "Transferring");
@@ -232,20 +216,21 @@ public:
 				name = argstr;
 				submit(331, "Password required");
 			} else if (cmd == "PASS") {
-				if (argstr == "123") {
+				if (auth->check(name, argstr)) {
 					printf("[d] (%i) logged in as '%s'\n", control_sock, name.c_str());
 					// We can now set the root safely (I hope).
-					filer->setRoot("/data/ftp-test/"+name);
+					filer->setRoot(auth->getUserDirectory(name));
 					state = 1;
-					submit(230, "Login successful");
+					submit(230, "Login OK");
 				} else {
-					submit(530, "Authentication refused.");
+					name = "";
-					return -1;
+					submit(530, "Invalid Credentials.");
 				}
 			} else if (cmd == "AUTH") {
 				submit(502, "Command not implemented");
 			} else {
-				submit(332, "Login Required");
+				submit(332, "Not Logged In!");
+				return -1;
 			}
 		}
 		return 0;
@@ -291,4 +276,4 @@ private:
 	int data_fd;
 	int data_sock;
 	struct sockaddr_in data_address;
-};
+};

src/conf.h

@@ -0,0 +1,116 @@
+#ifndef CONF_H
+#define CONF_H
+#include <map>
+#include <fstream>
+#include <vector>
+#include <stdlib.h>
+
+class ConfigSection {
+public:
+	ConfigSection() {};
+	ConfigSection(std::map<std::string, std::string> options) {
+		this->options = options;
+	}
+	
+	std::map<std::string, std::string> get() {
+		return this->options;
+	}
+	
+	std::vector<std::string> getKeyValues() {
+		std::vector<std::string> values;
+		for (auto const& c : this->options) {
+			values.push_back(c.first);
+		}
+		return values;
+	}
+	
+	std::string getValue(std::string name, std::string def) {
+		if (this->options.find(name) != this->options.end()) return this->options[name];
+		else return def;
+	}
+	
+	int getInt(std::string name, int def) {
+		if (this->options.find(name) != this->options.end()) return std::stoi(this->options[name]);
+		else return def;
+	}
+	
+	void setValue(std::string name, std::string value) {
+		this->options[name] = value;
+	}
+	
+	void setInt(std::string name, int value) {
+		this->options[name] = std::to_string(value);
+	}
+private:
+	std::map<std::string, std::string> options;
+};
+
+class ConfigFile {
+public:
+	ConfigFile() {};
+	ConfigFile(std::string path) {
+		std::ifstream file(path);
+		ConfigSection* section;
+		std::string line;
+		while (std::getline(file, line)) {
+			if (line.length() == 0) continue;
+			else if (line.rfind("#", 0) == 0) continue;
+			else if (line.rfind("[", 0) == 0) {
+				section = new ConfigSection();
+				this->sections[line.substr(1, line.find("]")-1)] = section;
+			} else if (line.find("=") != std::string::npos) {
+				section->setValue(line.substr(0, line.find("=")), line.substr(line.find("=")+1, line.length()));
+			}
+		}
+		printf("Configuration loaded: \"%s\"\n", path.c_str());
+	}
+	
+	std::map<std::string, ConfigSection*> get() {
+		return this->sections;
+	}
+	
+	ConfigSection* get(std::string section) {
+		return this->sections[section];
+	}
+	
+	std::vector<std::string> getKeyValues() {
+		std::vector<std::string> values;
+		for (auto const& c : this->sections) {
+			values.push_back(c.first);
+		}
+		return values;
+	}
+	
+	std::string getValue(std::string section, std::string name, std::string def) {
+		if (this->sections[section]->get().find(name) != this->sections[section]->get().end()) return this->sections[section]->getValue(name, def);
+		else return def;
+	}
+	
+	int getInt(std::string section, std::string name, int def) {
+		if (this->sections[section]->get().find(name) != this->sections[section]->get().end()) return this->sections[section]->getInt(name, def);
+		else return def;
+	}
+	
+	void setValue(std::string section, std::string name, std::string value) {
+		this->sections[section]->setValue(name, value);
+	}
+	
+	void setInt(std::string section, std::string name, int value) {
+		this->sections[section]->setInt(name, value);
+	}
+	
+	void write(std::string path) {
+		std::ofstream outfile(path);
+		for (std::map<std::string, ConfigSection*>::iterator si = this->sections.begin(); si != this->sections.end(); ++si) {
+			outfile << "[" << si->first << "]" << std::endl;
+			for (std::map<std::string, std::string>::iterator it = si->second->get().begin(); it != si->second->get().end(); ++it) {
+				outfile << it->first << "=" << it->second << std::endl;
+			}
+		}
+		outfile.close();
+	}
+private:
+	std::map<std::string, ConfigSection*> sections;
+};
+
+#endif

src/filer.cpp

@@ -78,6 +78,14 @@ public:
 		return fs::weakly_canonical(root.string()+"/"+(cwd / in).string());
 	}
 	
+	fs::path relPath() {
+		return fs::weakly_canonical("/"+cwd.string());
+	}
+	
+	fs::path relPath(std::string in) {
+		return fs::weakly_canonical("/"+(cwd / in).string());
+	}
+	
 	int fileSize(std::string name) {
 		fs::path nfile = fs::weakly_canonical(cwd / name);
 		fs::path ffile = fullPath(name);
@@ -114,19 +122,7 @@ public:
 		printf("[i] Retreiving file: %s\n", nfile.c_str());
 		if (ffile.string().rfind(root.string(), 0) != 0) fd.ecode = -2;
 		else if (!fs::exists(ffile)) fd.ecode = -1;
-		else if (type == 'A') {
+		else if (type != 'A') {
-			std::ifstream infile(ffile, std::ios::in|std::ios::ate);
-			if (infile.is_open()) {
-				std::string filedata;
-				for (std::string line; getline(infile, line);) {
-					filedata+=(line+"\r\n");
-				}
-				fd.size = filedata.size();
-				strncpy(fd.data, filedata.c_str(), fd.size);
-				infile.close();
-				fd.ecode = 0;
-			} else fd.ecode = -2;
-		} else {
 			std::ifstream infile(ffile, std::ios::in|std::ios::binary|std::ios::ate);
 			if (infile.is_open()) {
 				fd.size = infile.tellg();
@@ -136,7 +132,7 @@ public:
 				infile.close();
 				fd.ecode = 0;
 			} else fd.ecode = -2;
-		}
+		} else fd.ecode = -3;
 		return fd;
 	}
 	
@@ -153,7 +149,6 @@ public:
 			outfile.write((char *)data, size);
 			outfile.close();
 			return size;
-			
 		}
 		return 0;
 	}
@@ -167,7 +162,6 @@ public:
 			outfile.write((char *)data, size);
 			outfile.close();
 			return size;
-			
 		}
 		return 0;
 	}

src/main.cpp

@@ -15,67 +15,73 @@
 #include <errno.h>
 #include <fcntl.h>
 
+#include "main.h"
 #include "server.h"
 #include "client.cpp"
 #include "util.h"
 
 using namespace std::chrono_literals;
 
-// I stole the majority* of this multi-client sock code from IBM
+const int max_clients = config->getInt("net", "max_clients", 255);
-// of all places. Had to still modify it for my own uses but
+const int cport = config->getInt("net", "control_port", 21);
-// laziness wins again!
 
-struct pollfd fds[MAXCLIENTS];
+struct pollfd fds[65535];
 struct clientfd {
 	Client* client;
 	bool close = false;
-} fdc[MAXCLIENTS];
+} fdc[65535];
 
 bool run = true, compress_array = false;
 
 void runClient(struct clientfd* cfd) {
 	char inbuf[BUFFERSIZE];
-	printf("[d] C(%i) Initialized\n", cfd->client->control_sock);
+	//printf("[d] C(%i) Initialized\n", cfd->client->control_sock);
 	// Loop as long as it is a valid file descriptor.
 	try {
-	while (fcntl(cfd->client->control_sock, F_GETFD) != -1) {
+		//while (fcntl(cfd->client->control_sock, F_GETFD) != -1) {
-		printf("[d] C(%i) Attempting read...\n", cfd->client->control_sock);
+		while (true) {
-		int rc = recv(cfd->client->control_sock, inbuf, sizeof(inbuf), 0);
+			if (cfd->client == nullptr) { break; }
-		if (rc < 0) {
+			printf("[d] C(%i) Attempting read...\n", cfd->client->control_sock);
-			if (errno != EWOULDBLOCK) {
+			int rc = recv(cfd->client->control_sock, inbuf, sizeof(inbuf), 0);
-				perror("recv() failed");
+			if (rc < 0) {
+				printf("[d] C(%i) Recieved empty packet\n", cfd->client->control_sock);
+				if (errno != EWOULDBLOCK) {
+					perror("recv() failed");
+					break;
+				}
+				continue;
+			}
+			
+			if (rc == 0 || cfd->client == nullptr) {
+				//printf("[d] C(%i) closed\n", cfd->client->control_sock);
 				break;
 			}
-			continue;
-		}
-		
-		if (rc == 0 || cfd->client == nullptr) {
-			printf("[d] C(%i) closed\n", cfd->client->control_sock);
-			break;
-		}
-		
-		std::string lin(inbuf);
-		int len = lin.find("\r\n", 0);
-		int cmdend = lin.find(" ", 0);
-		if (cmdend >= len || cmdend == std::string::npos) cmdend = len;
-		std::string cmd = toUpper(lin.substr(0, cmdend));
-		std::string args = "";
-		if (len > cmdend) args = lin.substr(cmdend+1, len-cmdend-1);
 			
-		printf("[d] C(%i) >> '%s' '%s'\n", cfd->client->control_sock, cmd.c_str(), args.c_str());
+			std::string lin(inbuf);
-		
+			int len = lin.find("\r\n", 0);
-		if (cfd->client->receive(cmd, args) < 0) break;
+			int cmdend = lin.find(" ", 0);
-		inbuf[0] = '\0';
+			if (cmdend >= len || cmdend == std::string::npos) cmdend = len;
-	}
+			std::string cmd = toUpper(lin.substr(0, cmdend));
+			std::string args = "";
+			if (len > cmdend) args = lin.substr(cmdend+1, len-cmdend-1);
+				
+			printf("[d] C(%i) >> '%s' '%s'\n", cfd->client->control_sock, cmd.c_str(), args.c_str());
+			
+			if (cfd->client->receive(cmd, args) < 0) break;
+			inbuf[0] = '\0';
+		}
 	} catch (...) {
 		printf("[!] C(%i) Caught error!\n", cfd->client->control_sock);
 	}
-	cfd->client->thread.detach();
+	//printf("[d] C(%i) Marking for deletion...\n", cfd->client->control_sock);
-	printf("[d] C(%i) Marking for deletion...\n", cfd->client->control_sock);
 	cfd->close = true;
 }
 
 int main(int argc , char *argv[]) {
+	std::string authType = config->getValue("main", "auth_engine", "plain");
+	auth = getAuthByName(authType);
+	auth->setOptions(config->get(authType));
+
 	int opt = 1,
 		master_socket = -1,
 		newsock = -1,
@@ -103,7 +109,7 @@ int main(int argc , char *argv[]) {
 	
 	ctrl_address.sin_family = AF_INET;
 	ctrl_address.sin_addr.s_addr = INADDR_ANY;
-	ctrl_address.sin_port = htons(CONTROL_PORT);
+	ctrl_address.sin_port = htons(cport);
 	
 	if (bind(master_socket, (struct sockaddr *)&ctrl_address, sizeof(ctrl_address))<0 < 0) {
 		perror("bind() failed");
@@ -117,8 +123,8 @@ int main(int argc , char *argv[]) {
 		exit(-1);
 	}
 	
-	memset(fds, 0 , sizeof(fds));
+	memset(fds, 0, sizeof(fds));
-	memset(fdc, 0 , sizeof(fdc));
+	memset(fdc, 0, sizeof(fdc));
 	
 	fds[0].fd = master_socket;
 	fds[0].events = POLLIN;
@@ -146,7 +152,6 @@ int main(int argc , char *argv[]) {
 				printf("[!] C(%i) Error! revents = %d\n", fds[i].fd, fds[i].revents);
 				goto conn_close;
 			}
-			
 			if (fds[i].fd == master_socket) {
 				do {
 					newsock = accept(master_socket, NULL, NULL);
@@ -177,10 +182,11 @@ int main(int argc , char *argv[]) {
 					fdc[i].client = nullptr;
 					fdc[i].close = false;
 					compress_array = true;
+				} else {
+					fds[i].revents = 0;
 				}
 			}
 		}
-	
 		if (compress_array) {
 			compress_array = false;
 			for (int i = 0; i < nfds; i++) {
@@ -189,7 +195,13 @@ int main(int argc , char *argv[]) {
 						if (fds[j].fd == -1) {
 							printf("[d] Compressing: %i(fd:%i) <= %i(fd:%i)\n", j, fds[j].fd, j+1, fds[j+1].fd);
 							fds[j].fd = fds[j+1].fd;
+							fds[j].revents = fds[j+1].revents;
+							fds[j+1].fd = -1;
+							printf("[d] Reinitialized fds of %i\n", j+1);
 							fdc[j].client = fdc[j+1].client;
+							fdc[j].close = fdc[j+1].close;
+							fdc[j+1] = {};
+							printf("[d] Reinitialized fdc of %i\n", j+1);
 						}
 					}
 					i--;

src/main.h

@@ -0,0 +1,10 @@
+#ifndef MAIN_H
+#define MAIN_H
+#include "conf.h"
+#include "auth.h"
+#include "auth/noauth.h"
+
+ConfigFile* config = new ConfigFile("conf/ftp.conf");
+Auth* auth;
+
+#endif

src/server.h

@@ -1,13 +1,8 @@
 #ifndef SERVER_H
 #define SERVER_H
 
-// BUNCH OF BULLSHIT
+#define APPNAME			"digFTP"
-#define APPNAME			"tunnelFTP (Worlio Bridge)"
 #define APPVER			"0.0"
-#define CONTROL_PORT	21
-#define DATA_PORT		20
 #define BUFFERSIZE		1024*512
-#define MAXCLIENTS		256
-#define BASEDIR			"/data/ftp-test"
 
 #endif

src/util.h

@@ -9,6 +9,15 @@
 #include <iterator>
 #include <algorithm>
 
+std::string replace(std::string subject, const std::string& search, const std::string& replace) {
+	size_t pos = 0;
+	while ((pos = subject.find(search, pos)) != std::string::npos) {
+		subject.replace(pos, search.length(), replace);
+		pos += replace.length();
+	}
+	return subject;
+}
+
 template <typename Out>
 void split(const std::string &s, char delim, Out result, int limit) {
 	int it = 0;