我有一个c ++代码似乎每天晚上从凌晨2点到早上6点因某种原因而死。我调查了日志文件，发现死亡不是由于数据库错误造成的。也没有例外。我检查了系统日志，c ++中没有任何内容。我正在使用Ubuntu服务器来运行c ++。我在这里添加我的代码请帮助我。
int main(int argc, char *argv[]) {
try {
int sockfd, portno, net_socket2, portno2;
struct sockaddr_in serv_addr;
struct sockaddr_in si_output2;
struct hostent *server;
int iof;
int n, udp_size;
unsigned char receivedMessage[256];
unsigned char buffer[50];
// register the signal (exception) handler
signal(SIGINT, SIGINThandler);
// Log on //////////////////////////////////////////////////////////////////////////////////////////////////////
printf("Logging on\n");
log("Logging on");
portno = SERVER_PORT;
sockfd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (sockfd < 0) {
log("ERROR opening socket");
error("ERROR opening socket");
}
printf("Socket opened \n");
log("Socket opened");
bzero((char *) &serv_addr, sizeof (serv_addr)); //clear the structure
serv_addr.sin_family = AF_INET;
if (inet_aton(SERVER_IP, &serv_addr.sin_addr) == 0) {
printf("inet_aton() failed \n");
log("inet_aton() failed ");
return 0;
}
serv_addr.sin_port = htons(portno); //set the host port
const struct sockaddr *to_cast = (struct sockaddr *) &serv_addr;
printf("Connecting to %s %d on port %d \n", SERVER_IP, serv_addr.sin_addr.s_addr, portno);
log("Connecting to port on the server");
if (connect(sockfd, to_cast, sizeof (serv_addr)) < 0) {
log("Error connecting");
error("ERROR connecting\n");
}
if ((fcntl(sockfd, F_GETFL, 0)) != -1)
fcntl(sockfd, F_SETFL, iof | O_NONBLOCK);
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// now open udp socket to receive messages from host /////////////////////////////////////////////////////////////
int MESSAGE_PORT = 6001;
if ((net_socket2 = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) == -1) {
log("Message socket problem");
perror("setsockopt");
exit(1);
printf("message socket problem \n");
close(net_socket2);
return 0;
}
memset((char*) &si_output2, sizeof (si_output2), 0);
si_output2.sin_family = AF_INET;
si_output2.sin_port = htons(MESSAGE_PORT);
si_output2.sin_addr.s_addr = INADDR_ANY;
//bind socket for incomming messages
log("bind socket for incomming messages");
if (bind(net_socket2, (struct sockaddr *) &si_output2, sizeof (struct sockaddr)) == -1) {
log("Socket 2 bind failed");
printf("socket 2 bind failed \n");
close(net_socket2);
return 0;
}
//set to non blocking
if ((iof = fcntl(net_socket2, F_GETFL, 0)) != -1)
fcntl(net_socket2, F_SETFL, iof | O_NONBLOCK);
//In the above INADDR_ANY means the message could come from anywhere, you
//would have to select a free port for MESSAGE_PORT
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Send the logon message
log("Send the logon message");
unsigned char* logonMessage = msgLogon();
//cout << "\nLogon Message Begin: ";
displayByteArray(logonMessage, 38);
//cout << "\nLogon Message End\n";
n = write(sockfd, logonMessage, 38);
if (n < 0) {
log("ERROR writing to socket");
error("ERROR writing to socket");
}
// Assume we are logged in now so start receiving messages ////////////////////////////////////////////////////////
log("Assume we are logged in now so start receiving messages");
while (true) {
// Check for incomming message from etsl //
bzero(receivedMessage, 256); //clear the received message
n = read(sockfd, receivedMessage, 255);
if (n > 0) {
//cout << "\nReceived Message Begin: ";
//displayByteArray(receivedMessage, n);
//cout << "\nReceived Message End\n";
MsgReply message = MsgReply(receivedMessage, n);
messageHandler(message);
if (message.getValue()) { //If we can get a reply message
unsigned char* replyMessage = message.getReplyMessage();
//int m = sizeof(replyMessage)/sizeof(replyMessage[0]);
int m = message.getReplyMessageLength();
//cout << "\nReply Message Length: m: " << m;
n = write(sockfd, replyMessage, m);
if (n < 0) {
log("ERROR writing to socket");
error("ERROR writing to socket");
}
} else {
log("Did not reply to this message");
//cout << "\nDid not reply to this message\n";
}
}
if (sendLogoff) {
//cout << "\nreceived a control c";
log("Send the logoff message");
// Send the logon message
unsigned char* logoffMessage = msgLogoff();
//cout << "\nLogoff Message Begin: ";
displayByteArray(logoffMessage, 38);
//cout << "\nLogoff Message End\n";
n = write(sockfd, logonMessage, 38);
if (n < 0) {
log("ERROR writing to socket");
error("ERROR writing to socket");
}
sendLogoff = false;
}
}
log("Exit main block on success");
return EXIT_SUCCESS;
} catch (const std::exception& ex) {
//cout<< ex.what();
log(ex.what());
} catch (const std::string& ex) {
//cout << ex;
log(ex);
} catch (...) {
log("unknown exception");
}
}
这是MessageHandler代码
void messageHandler(MsgReply& message) {
string msgStr = byteArrayToHexString(message.getReceivedMessage(), 2 * message.getReceivedMessageLength());
int type = messageType(msgStr);
if ((type == 220) || (type == 221)) {
string subMsg;
string replyMsgStr;
//message type
replyMsgStr = "0230";
//bit map
subMsg = "323A00000A008000";
replyMsgStr.append(subMsg);
//processing code
subMsg = msgStr.substr(24, 6);
replyMsgStr.append(subMsg);
//amount
subMsg = msgStr.substr(30, 12);
replyMsgStr.append(subMsg);
//date/time
subMsg = msgStr.substr(42, 10);
replyMsgStr.append(subMsg);
//trace number
subMsg = msgStr.substr(52, 6);
replyMsgStr.append(subMsg);
//local time
subMsg = msgStr.substr(58, 6);
replyMsgStr.append(subMsg);
//local date
subMsg = msgStr.substr(64, 4);
replyMsgStr.append(subMsg);
//settelment date
subMsg = msgStr.substr(72, 4);
replyMsgStr.append(subMsg);
//retrieval reference number
subMsg = msgStr.substr(108, 24);
replyMsgStr.append(subMsg);
//responce code
subMsg = msgStr.substr(144, 4);
replyMsgStr.append(subMsg);
//transaction currency code
subMsg = "0554";
replyMsgStr.append(subMsg);
// Get message length
int length = replyMsgStr.length();
length = length / 2;
string msgLength = intToHex(length);
replyMsgStr = msgLength.append(replyMsgStr);
message.setReplyMessage(replyMsgStr);
}
if (type == 100) {
string subMsg;
string replyMsgStr;
string processing_code = msgStr.substr(24, 6); // The processing code
string amount = msgStr.substr(30, 12); // The amount
string transaction_number = msgStr.substr(52, 6); // The trace number
string magnetic_number = msgStr.substr(106, 16); // The track2data
string database = msgStr.substr(112, 2); // Which database we query
string etsl_number = hexStringToAsciiString(msgStr.substr(130, 24), 12); // The retreival reference number
string terminal_number = hexStringToAsciiString(msgStr.substr(170, 30), 15);
; // The card acceptor id code
string return_string;
string return_code;
string return_value;
string pinpadMessage;
string terminalMessage;
string receiptText1;
string receiptText2;
string tmLength;
// Get response code
bool rewardOnPurchase;
stringstream ss;
double numDouble;
int numInt;
ss << database;
ss >> numInt;
if (numInt == 10) {
//cout << "\nProwze Database";
replyMsgStr = "0110B23A4481AAE180000000000000000080";
subMsg = msgStr.substr(24, 130);
replyMsgStr = replyMsgStr.append(subMsg);
// Get Processing Code and Reward Amount
rewardOnPurchase = false;
return_string = prowze_db(processing_code, amount, transaction_number, magnetic_number, etsl_number, terminal_number, rewardOnPurchase);
//cout << "\nreturn_string: " << return_string << "\n\n";
return_code = return_string.substr(0, 4);
//return_code = "3035";
return_value = return_string.substr(4, 8);
// Convert return value to hex
return_value = asciiStringToHexString(return_value, 8);
//cout << "\nprocessing_code: " << processing_code;
if (atoi(processing_code.c_str()) == 13000) {
//cout << "\nReward Transaction";
if (atoi(return_code.c_str()) == 3030) {
//cout << "\nAccepted Reward Transaction";
//terminalMessage = "20202020414343455054454420202020";
terminalMessage = terminalMessage.append("2052455741524420");
terminalMessage = terminalMessage.append(return_value);
terminalMessage = terminalMessage.append("20202020414343455054454420202020");
terminalMessage = terminalMessage.append("594F55522052455741524420");
terminalMessage = terminalMessage.append(return_value);
terminalMessage = terminalMessage.append("50524F575A452052455741524453204341534821");
string tmLength = "0072";
terminalMessage = tmLength.append(terminalMessage);
} else if (atoi(return_code.c_str()) == 3537) {
//cout << "\nDeclined Reward Transaction: Card On Hold";
terminalMessage = "202043415244204F4E20484F4C442020";
terminalMessage = terminalMessage.append("202020204445434C494E454420202020");
terminalMessage = terminalMessage.append("2020202043415244204F4E20484F4C4420202020");
terminalMessage = terminalMessage.append("50524F575A452052455741524453204341534821");
tmLength = "0072";
terminalMessage = tmLength.append(terminalMessage);
} else {
//cout << "\nDeclined Reward Transaction";
terminalMessage = "202020204445434C494E454420202020";
terminalMessage = terminalMessage.append("202020204445434C494E454420202020");
terminalMessage = terminalMessage.append("594F5552205245574152442024303030302E3030");
terminalMessage = terminalMessage.append("50524F575A452052455741524453204341534821");
tmLength = "0072";
terminalMessage = tmLength.append(terminalMessage);
}
} else if (atoi(processing_code.c_str()) == 3000) {
//cout << "\nPurchase Transaction";
if (atoi(return_code.c_str()) == 3030) {
//cout << "\nAccepted Purchase Transaction";
// Perform Reward on Purchase
rewardOnPurchase = true;
return_string = prowze_db("013000", amount, transaction_number, magnetic_number, etsl_number, terminal_number, rewardOnPurchase);
//cout << "\nreturn_string: ";
//return_code = return_string.substr(0,4);
return_value = return_string.substr(4, 8);
// Convert return value to hex
return_value = asciiStringToHexString(return_value, 8);
terminalMessage = "41434345505420574954482053494720";
terminalMessage = terminalMessage.append("41434345505420574954482053494720");
terminalMessage = terminalMessage.append("2020414343455054205749544820534947202020");
terminalMessage = terminalMessage.append("594F55522052455741524420");
terminalMessage = terminalMessage.append(return_value);
string tmLength = "0072";
terminalMessage = tmLength.append(terminalMessage);
} else if (atoi(return_code.c_str()) == 3537) {
//cout << "\nDeclined Reward Transaction: Card On Hold";
terminalMessage = "202043415244204F4E20484F4C442020";
terminalMessage = terminalMessage.append("202020204445434C494E454420202020");
terminalMessage = terminalMessage.append("2020202043415244204F4E20484F4C4420202020");
terminalMessage = terminalMessage.append("50524F575A452052455741524453204341534821");
tmLength = "0072";
terminalMessage = tmLength.append(terminalMessage);
} else {
//cout << "\nDeclined Purchase Transaction";
terminalMessage = "202020204445434C494E454420202020";
terminalMessage = terminalMessage.append("202020204445434C494E454420202020");
terminalMessage = terminalMessage.append("594F5552205245574152442024303030302E3030");
terminalMessage = terminalMessage.append("50524F575A452052455741524453204341534821");
tmLength = "0072";
terminalMessage = tmLength.append(terminalMessage);
}
} else {
//cout << "\nUnkown Transaction Type";
// Return Code
return_code = "3035";
// Decline message
terminalMessage = "202020204445434C494E454420202020";
terminalMessage = terminalMessage.append("202020204445434C494E454420202020");
terminalMessage = terminalMessage.append("594F5552205245574152442024303030302E3030");
terminalMessage = terminalMessage.append("50524F575A452052455741524453204341534821");
tmLength = "0072";
terminalMessage = tmLength.append(terminalMessage);
}
// Append Return Code
replyMsgStr = replyMsgStr.append(return_code);
//subMsg = msgStr.substr(154,166);
//154 =
subMsg = msgStr.substr(154);
replyMsgStr = replyMsgStr.append(subMsg);
//Check to see if the message is a pre-auth
//Not pre-auth bit map: 323A4481A8E18000
//pre-auth bit map: 323A4481A8E18080
//cout << "\nCheck bit 15 of bitmap to see if message is a pre-auth: " << msgStr.substr(22,1);
if (!((msgStr.substr(22, 1)).compare("8"))) {
//cout << ": Therefore pre-auth message";
int aa = replyMsgStr.length();
aa = aa - 10;
replyMsgStr = replyMsgStr.substr(0, aa);
} else //cout << ": Therefore non pre-auth message";
// Append Terminal Message
replyMsgStr = replyMsgStr.append(terminalMessage);
// Get message length
int length = replyMsgStr.length();
length = length / 2;
string msgLength = intToHex(length);
replyMsgStr = msgLength.append(replyMsgStr);
message.setReplyMessage(replyMsgStr);
} else if (numInt == 20) {
//cout << "\nBarter Database";
replyMsgStr = "0110B23A4481AAE180000000000000000080";
subMsg = msgStr.substr(24, 130);
replyMsgStr = replyMsgStr.append(subMsg);
// Get Return Code
//cout << "\nprocessing_code: " << processing_code << "\n";
if (atoi(processing_code.c_str()) == 3000) {
return_code = barter_db(processing_code, amount, transaction_number, magnetic_number, etsl_number, terminal_number);
} else {
return_code = "3035";
}
//cout << "\nreturn_code: " << return_code;
if (atoi(processing_code.c_str()) == 3000) {
//cout << "\nPurchase Transaction";
if (atoi(return_code.c_str()) == 3030) {
//cout << "\nAccepted Purchase Transaction";
//terminalMessage = "20202020414343455054454420202020"; //ACCEPTED
terminalMessage = "41434345505420574954482053494720"; //ACCEPT WITH SIG
terminalMessage = terminalMessage.append("41434345505420574954482053494720"); //ACCEPT WITH SIG
terminalMessage = terminalMessage.append("42415254455253504143452053484F5050494E47"); //BARTERSPACE SHOPPING
terminalMessage = terminalMessage.append("2020202042415254455253504143452020202020"); //BARTERSPACE
string tmLength = "0072";
terminalMessage = tmLength.append(terminalMessage);
} else if (atoi(return_code.c_str()) == 3537) {
//cout << "\nDeclined Purchase Transaction: Card On Hold";
terminalMessage = "202043415244204F4E20484F4C442020";
terminalMessage = terminalMessage.append("202020204445434C494E454420202020");
terminalMessage = terminalMessage.append("42415254455253504143452053484F5050494E47");
string tmLength = "0052";
terminalMessage = tmLength.append(terminalMessage);
} else {
//cout << "\nDeclined Purchase Transaction";
terminalMessage = "202020204445434C494E454420202020";
terminalMessage = terminalMessage.append("202020204445434C494E454420202020");
terminalMessage = terminalMessage.append("42415254455253504143452053484F5050494E47");
string tmLength = "0052";
terminalMessage = tmLength.append(terminalMessage);
}
} else {
//cout << "\nUnkown Transaction Type";
// Return Code
return_code = "3035";
// Decline message
terminalMessage = "202020204445434C494E454420202020";
terminalMessage = terminalMessage.append("202020204445434C494E454420202020");
terminalMessage = terminalMessage.append("42415254455253504143452053484F5050494E47");
string tmLength = "0052";
terminalMessage = tmLength.append(terminalMessage);
}
// Append Return Code
replyMsgStr = replyMsgStr.append(return_code);
//subMsg = msgStr.substr(154,166);
subMsg = msgStr.substr(154);
replyMsgStr = replyMsgStr.append(subMsg);
//Check to see if the message is a pre-auth
//Not pre-auth bit map: 323A4481A8E18000
//pre-auth bit map: 323A4481A8E18080
//cout << "\nCheck bit 15 of bitmap to see if message is a pre-auth: " << msgStr.substr(22,1);
if (!((msgStr.substr(22, 1)).compare("8"))) {
//cout << ": Therefore pre-auth message";
int aa = replyMsgStr.length();
aa = aa - 10;
replyMsgStr = replyMsgStr.substr(0, aa);
} else //cout << ": Therefore non pre-auth message";
// Append Terminal Message
replyMsgStr = replyMsgStr.append(terminalMessage);
// Get message length
int length = replyMsgStr.length();
length = length / 2;
string msgLength = intToHex(length);
replyMsgStr = msgLength.append(replyMsgStr);
message.setReplyMessage(replyMsgStr);
} else {
//cout << "\nCould Not Find Database";
//Message type and bit map
replyMsgStr = "0110323A4481AAE18000";
subMsg = msgStr.substr(24, 130);
replyMsgStr = replyMsgStr.append(subMsg);
// Return Code
//subMsg = barter_db(processing_code, amount, transaction_number, magnetic_number, etsl_number, terminal_number);
return_code = "3035";
replyMsgStr = replyMsgStr.append(return_code);
subMsg = msgStr.substr(154);
replyMsgStr = replyMsgStr.append(subMsg);
// Get message length
int length = replyMsgStr.length();
length = length / 2;
string msgLength = intToHex(length);
replyMsgStr = msgLength.append(replyMsgStr);
message.setReplyMessage(replyMsgStr);
}
// Put in additional user information
//replyMsgStr = replyMsgStr.append(terminalMessage);
// Accept message reward
/* string terminalMessage = "20202020414343455054454420202020";
terminalMessage = terminalMessage.append("20202020414343455054454420202020");
terminalMessage = terminalMessage.append("594F5552205245574152442024303030302E3030");
terminalMessage = terminalMessage.append("50524F575A452052455741524453204341534821");
string tmLength = "0072";
terminalMessage = tmLength.append(terminalMessage);
replyMsgStr = replyMsgStr.append(terminalMessage);
*/
// Decline message reward
/* terminalMessage = "202020204445434C494E454420202020";
terminalMessage = terminalMessage.append("202020204445434C494E454420202020");
terminalMessage = terminalMessage.append("594F5552205245574152442024303030302E3030");
terminalMessage = terminalMessage.append("50524F575A452052455741524453204341534821");
tmLength = "0072";
terminalMessage = tmLength.append(terminalMessage);
replyMsgStr = replyMsgStr.append(terminalMessage);
*/
// Accept message purchase
/* string terminalMessage = "20202020414343455054454420202020";
terminalMessage = terminalMessage.append("202020204445434C494E454420202020");
terminalMessage = terminalMessage.append("594F5552205245574152442024303030302E3030");
terminalMessage = terminalMessage.append("50524F575A452052455741524453204341534821");
string tmLength = "0072";
terminalMessage = tmLength.append(terminalMessage);
replyMsgStr = replyMsgStr.append(terminalMessage);
*/
// Decline message purchase
/* string terminalMessage = "202020204445434C494E454420202020";
terminalMessage = terminalMessage.append("202020204445434C494E454420202020");
terminalMessage = terminalMessage.append("594F5552205245574152442024393030302E3030");
terminalMessage = terminalMessage.append("50524F575A452052455741524453204341534821");
string tmLength = "0072";
terminalMessage = tmLength.append(terminalMessage);
replyMsgStr = replyMsgStr.append(terminalMessage);
*/
} else if (type == 800) {
string subMsg;
string replyMsgStr = "001E08108220000002000000";
subMsg = "0400000000000000";
replyMsgStr = replyMsgStr.append(subMsg);
subMsg = msgStr.substr(40, 16);
replyMsgStr = replyMsgStr.append(subMsg);
replyMsgStr = replyMsgStr.append("3030");
subMsg = msgStr.substr(56, 4);
replyMsgStr = replyMsgStr.append(subMsg);
message.setReplyMessage(replyMsgStr);
} else if ((type == 420) || (type == 421)) {
string subMsg;
string replyMsgStr = "";
string processing_code = msgStr.substr(40, 6); // The processing code
string amount = msgStr.substr(46, 12); // The amount
string transaction_number = msgStr.substr(68, 6); // The trace number
string magnetic_number = msgStr.substr(122, 16); // The track2data
string database = msgStr.substr(128, 2); // Which database we query
string etsl_number = hexStringToAsciiString(msgStr.substr(146, 24), 12); // The retreival reference number
subMsg = "0430B23A00000A0080000000004000000000";
replyMsgStr = replyMsgStr.append(subMsg);
subMsg = msgStr.substr(40, 48);
replyMsgStr = replyMsgStr.append(subMsg);
subMsg = msgStr.substr(146, 24);
;
replyMsgStr = replyMsgStr.append(subMsg);
if (atoi(database.c_str()) == 10) {
//cout << "\nChecking prowze database for reversal\n";
subMsg = prowze_db_rev(processing_code, amount, transaction_number, magnetic_number, etsl_number);
//cout << "\nreturnCode: " << subMsg << "\n";
} else if (atoi(database.c_str()) == 20) {
//cout << "\nChecking barter database for reversal\n";
subMsg = barter_db_rev(processing_code, amount, transaction_number, magnetic_number, etsl_number);
//cout << "\nreturnCode: " << subMsg << "\n";
} else {
subMsg = "3030";
}
replyMsgStr = replyMsgStr.append(subMsg);
//subMsg = msgStr.substr(270,4);
//replyMsgStr = replyMsgStr.append(subMsg);
//subMsg = msgStr.substr(318,42);
//replyMsgStr = replyMsgStr.append(subMsg);
subMsg = msgStr.substr(316, 46); //changed from 336 to 316 due to the reversal issue,,,,not it should be fixed.
replyMsgStr = replyMsgStr.append(subMsg);
// Get message length
int length = replyMsgStr.length();
length = length / 2;
string msgLength = intToHex(length);
replyMsgStr = msgLength.append(replyMsgStr);
message.setReplyMessage(replyMsgStr);
}
}
答案 0 :(得分：2)
在if (sendLogoff)代码中，您似乎创建了logoffMessage，但发送了logonMessage。此外，如果消息是动态分配的，我看不到你试图在任何地方解除分配。
我对replyMessage的内存分配和释放有类似的担忧。
我无法了解messageHandler的作用。
如果您写入不再与其对等方连接的套接字，程序将收到SIGPIPE。如果您没有实现信号处理程序来处理它，您的程序将终止。如果您使用send代替write，则可以传递MSG_NOSIGNAL标记以取消SIGPIPE，send将返回EPIPE而是错误信息。
由于你将套接字设置为非阻塞，你应该注意Loki Astari关于简短读写的警告，以及他处理它们的建议。
由于命令是从cron作业启动的，我建议您查看是否通过电子邮件向您发送了该程序的输出。如果在系统上禁用了输出的电子邮件，请修改cron作业条目以将输出重定向到您可以检查的日志文件。使用bash，您可以使用&>重定向执行此操作。如，
$ command &> /tmp/command.log