/* * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ /******************************************************************* * * DESCRIPTION: Файл с основными функциями для сетевого обмена данными * с менеджером клиентов. Прием, передача и шифрование сообщений. * * AUTHOR: Boris Mikhailenko * * $Revision: 1.24 $ * $Date: 2010/10/04 20:24:54 $ * *******************************************************************/ #include #include #include // snprintf #include "configproto.h" #include "blowfish.h" #ifndef ENODATA // FreeBSD 4.* - suxx #define ENODATA -1 #endif enum CONF_STATE { confHdr, confLogin, confLoginCipher, confData }; enum { ans_ok = 0, ans_err }; //----------------------------------------------------------------------------- int CONFIGPROTO::Prepare() { list ansList; //Сюда будет помещен ответ для менеджера клиентов int res; struct sockaddr_in listenAddr; sigset_t sigmask, oldmask; sigemptyset(&sigmask); sigaddset(&sigmask, SIGINT); sigaddset(&sigmask, SIGTERM); sigaddset(&sigmask, SIGUSR1); sigaddset(&sigmask, SIGHUP); pthread_sigmask(SIG_BLOCK, &sigmask, &oldmask); listenSocket = socket(PF_INET, SOCK_STREAM, 0); if (listenSocket < 0) { errorStr = "Create NET_CONFIGURATOR socket failed."; return -1; } listenAddr.sin_family = PF_INET; listenAddr.sin_port = htons(port); listenAddr.sin_addr.s_addr = inet_addr("0.0.0.0"); int lng = 1; if (0 != setsockopt(listenSocket, SOL_SOCKET, SO_REUSEADDR, &lng, 4)) { errorStr = "Setsockopt failed. " + string(strerror(errno)); return -1; } res = bind(listenSocket, (struct sockaddr*)&listenAddr, sizeof(listenAddr)); if (res == -1) { errorStr = "Bind admin socket failed"; return -1; } res = listen(listenSocket, 0); if (res == -1) { errorStr = "Listen admin socket failed"; return -1; } errorStr = ""; nonstop = true; return 0; } //----------------------------------------------------------------------------- int CONFIGPROTO::Stop() { nonstop = false; close(listenSocket); //TODO: Idiotism int sock; struct sockaddr_in addr; socklen_t addrLen; addr.sin_family = PF_INET; addr.sin_port = htons(port); addr.sin_addr.s_addr = inet_addr("127.0.0.1"); addrLen = sizeof(addr); sock = socket(PF_INET, SOCK_STREAM, 0); connect(sock, (sockaddr*)&addr, addrLen); close(sock); //Idiotism end return 0; } //----------------------------------------------------------------------------- // Функция общения с конфигуратором void * CONFIGPROTO::Run(void * a) { /* * Function Name:ReciveSendConf * Parameters: void * a указатель на экземпляр класса CONFIGPROTO * Description: Эта функция обеспечивает сетевое взаимодействие * с Менеджером Клиентов. В ее задачи входит: прием запросов по TCP/IP * их расшифровка, передача принятых данных анализатору и отправка ответа назад. * Returns: возвращает NULL */ CONFIGPROTO * cp = (CONFIGPROTO*)a; cp->state = confHdr; while (cp->nonstop) { cp->state = confHdr; struct sockaddr_in outerAddr; socklen_t outerAddrLen(sizeof(outerAddr)); int outerSocket = accept(cp->listenSocket, (struct sockaddr*)(&outerAddr), &outerAddrLen); if (!cp->nonstop) { continue; } if (outerSocket == -1) { printfd(__FILE__, "accept failed\n"); usleep(100000); continue; } cp->adminIP = *(unsigned int*)&(outerAddr.sin_addr); printfd(__FILE__, "Connection accepted from %s\n", inet_ntostring(outerAddr.sin_addr.s_addr).c_str()); if (cp->state == confHdr) { if (cp->RecvHdr(outerSocket) < 0) { close(outerSocket); continue; } if (cp->state == confLogin) { if (cp->SendHdrAnswer(outerSocket, ans_ok) < 0) { close(outerSocket); continue; } if (cp->RecvLogin(outerSocket) < 0) { close(outerSocket); continue; } if (cp->state == confLoginCipher) { if (cp->SendLoginAnswer(outerSocket, ans_ok) < 0) { close(outerSocket); continue; } if (cp->RecvLoginS(outerSocket) < 0) { close(outerSocket); continue; } if (cp->state == confData) { if (cp->SendLoginSAnswer(outerSocket, ans_ok) < 0) { close(outerSocket); continue; } if (cp->RecvData(outerSocket) < 0) { close(outerSocket); continue; } cp->state = confHdr; } else { if (cp->SendLoginSAnswer(outerSocket, ans_err) < 0) { close(outerSocket); continue; } cp->WriteLogAccessFailed(cp->adminIP); } } else { cp->WriteLogAccessFailed(cp->adminIP); } } else { cp->WriteLogAccessFailed(cp->adminIP); if (cp->SendHdrAnswer(outerSocket, ans_err) < 0) { close(outerSocket); continue; } } } else { cp->WriteLogAccessFailed(cp->adminIP); } close(outerSocket); } return NULL; } //----------------------------------------------------------------------------- int CONFIGPROTO::RecvHdr(int sock) { char buf[sizeof(STG_HEADER)]; memset(buf, 0, sizeof(STG_HEADER)); int ret; int stgHdrLen = strlen(STG_HEADER); for (int i = 0; i < stgHdrLen; i++) { ret = recv(sock, &buf[i], 1, 0); if (ret <= 0) { state = confHdr; return -1; } } if (0 == strncmp(buf, STG_HEADER, strlen(STG_HEADER))) { state = confLogin; return 0; } else { SendError("Bad request"); } state = confHdr; return -1; } //----------------------------------------------------------------------------- int CONFIGPROTO::SendHdrAnswer(int sock, int err) { int ret; if (err) { ret = send(sock, ERR_HEADER, sizeof(ERR_HEADER)-1, 0); if (ret < 0) { WriteServLog("send ERR_HEADER error in SendHdrAnswer."); return -1; } } else { ret = send(sock, OK_HEADER, sizeof(OK_HEADER)-1, 0); if (ret < 0) { WriteServLog("send OK_HEADER error in SendHdrAnswer."); return -1; } } return 0; } //----------------------------------------------------------------------------- int CONFIGPROTO::RecvLogin(int sock) { char login[ADM_LOGIN_LEN+1]; int ret; memset(login, 0, ADM_LOGIN_LEN + 1); ret = recv(sock, login, ADM_LOGIN_LEN, 0); if (ret < 0) { // Error in network close(sock); state = confHdr; return ENODATA; } if (ret < ADM_LOGIN_LEN) { // Error in protocol close(sock); state = confHdr; return ENODATA; } if (admins->FindAdmin(login, &currAdmin)) { // Admin not found close(sock); state = confHdr; return ENODATA; } currAdmin.SetAdminIP(adminIP); adminLogin = login; state = confLoginCipher; return 0; } //----------------------------------------------------------------------------- int CONFIGPROTO::SendLoginAnswer(int sock, int) { int ret; ret = send(sock, OK_LOGIN, sizeof(OK_LOGIN)-1, 0); if (ret < 0) { WriteServLog("Send OK_LOGIN error in SendLoginAnswer."); return -1; } return 0; } //----------------------------------------------------------------------------- int CONFIGPROTO::RecvLoginS(int sock) { char loginS[ADM_LOGIN_LEN + 1]; char login[ADM_LOGIN_LEN + 1]; int ret; BLOWFISH_CTX ctx; memset(loginS, 0, ADM_LOGIN_LEN + 1); int total = 0; while (total < ADM_LOGIN_LEN) { ret = recv(sock, &loginS[total], ADM_LOGIN_LEN - total, 0); if (ret < 0) { // Network error printfd(__FILE__, "recv error: '%s'\n", strerror(errno)); close(sock); state = confHdr; return ENODATA; } total += ret; } if (currAdmin.GetLogin() == "") { state = confHdr; return ENODATA; } EnDecodeInit(currAdmin.GetPassword().c_str(), ADM_PASSWD_LEN, &ctx); for (int i = 0; i < ADM_LOGIN_LEN/8; i++) { DecodeString(login + i*8, loginS + i*8, &ctx); } if (currAdmin == admins->GetNoAdmin()) { // If there are no admins registered in the system - give access with any password state = confData; return 0; } if (strncmp(currAdmin.GetLogin().c_str(), login, ADM_LOGIN_LEN) != 0) { state = confHdr; return ENODATA; } state = confData; return 0; } //----------------------------------------------------------------------------- int CONFIGPROTO::SendLoginSAnswer(int sock, int err) { int ret; if (err) { ret = send(sock, ERR_LOGINS, sizeof(ERR_LOGINS)-1, 0); if (ret < 0) { WriteServLog("send ERR_LOGIN error in SendLoginAnswer."); return -1; } } else { ret = send(sock, OK_LOGINS, sizeof(OK_LOGINS)-1, 0); if (ret < 0) { WriteServLog("send OK_LOGINS error in SendLoginSAnswer."); return -1; } } return 0; } //----------------------------------------------------------------------------- int CONFIGPROTO::RecvData(int sock) { int ret; char bufferS[8]; char buffer[9]; buffer[8] = 0; requestList.clear(); BLOWFISH_CTX ctx; EnDecodeInit(currAdmin.GetPassword().c_str(), ADM_PASSWD_LEN, &ctx); while (1) { int total = 0; bool done = false; while (total < 8) { ret = recv(sock, &bufferS[total], 8 - total, 0); if (ret < 0) { // Network error close(sock); return 0; } if (ret < 8) { if (memchr(buffer, 0, ret) != NULL) { done = true; break; } } total += ret; } DecodeString(buffer, bufferS, &ctx); requestList.push_back(std::string(buffer, total)); if (done || memchr(buffer, 0, total) != NULL) { // Конец посылки if (ParseCommand()) { SendError("Bad command"); } return SendDataAnswer(sock); } } return 0; } //----------------------------------------------------------------------------- int CONFIGPROTO::SendDataAnswer(int sock) { list::iterator li; li = answerList.begin(); BLOWFISH_CTX ctx; char buff[8]; char buffS[8]; int n = 0; int k = 0; int ret = 0; EnDecodeInit(currAdmin.GetPassword().c_str(), ADM_PASSWD_LEN, &ctx); while (li != answerList.end()) { while ((*li).c_str()[k]) { buff[n%8] = (*li).c_str()[k]; n++; k++; if (n%8 == 0) { EncodeString(buffS, buff, &ctx); ret = send(sock, buffS, 8, 0); if (ret < 0) { return -1; } } } k = 0;// new node li++; } if (answerList.empty()) { return 0; } buff[n%8] = 0; EncodeString(buffS, buff, &ctx); answerList.clear(); return send(sock, buffS, 8, 0); } //----------------------------------------------------------------------------- void CONFIGPROTO::SendError(const char * text) { char s[255]; answerList.clear(); snprintf(s, 255, "", text); answerList.push_back(s); } //----------------------------------------------------------------------------- void CONFIGPROTO::WriteLogAccessFailed(uint32_t ip) { WriteServLog("Admin's connect failed. IP %s", inet_ntostring(ip).c_str()); } //-----------------------------------------------------------------------------