Segmentation fault on TCP server.

I have developed a server in C ++ and a client that connects to it.
I run it on a PC with linux.
When we run the server and a client is connected to it, a
Segmentation fault on the server, specifically, on the line:
sClient = ((struct ThreadArgs *) threadArgs) -> sClient;
Attached is the source code of the server:
ServerTCP.h
ifndef SERVER_TCP
define SERVER_TCP
include <stdio.h>
include <sys/socket.h>
include <arpa/inet.h>
include <stdlib.h>
include <string.h>
include <unistd.h>
include <pthread.h>
struct ThreadArgs
{
int sClient;
};
typedef void* (*THREAD_FUNC_PTR)(void *);
class ServerTCP
{
private:
int sPort;
public:
ServerTCP(unsigned int port);
void *ThreadMain(void *threadArgs);
void waitConnections();
};
endif
ServerTCP.cpp
include "ServerTCP.h"
define MAX_DATA_LENGTH 65000
ServerTCP::ServerTCP (unsigned int port)
{
sPort = port;
}
void* ServerTCP::ThreadMain(void *threadArgs)
{
int sClient;
int ret;
char data_in[MAX_DATA_LENGTH];
pthread_detach(pthread_self() ) ;
//>>> SIGSEGV, Segmentation fault
sClient = ((struct ThreadArgs *) threadArgs) -> sClient;
free(threadArgs);
ret = 1;
while (ret != 0)
{
ret = recv(sClient, data_in, MAX_DATA_LENGTH, 0);
if (ret < 0)
{
printf("Error: Call to recv(sClient, frame_in, sizeof(frame_in), 0); has failed.\n");
exit(1);
}
}
close(sClient);
return NULL;
}
void ServerTCP::waitConnections()
{
int ret;
unsigned int iPort, iAddrLen;
int sListen, sClient;
struct sockaddr_in addr, remote_addr;
pthread_t threadID;
struct ThreadArgs *threadArgs;
sListen = socket(AF_INET, SOCK_STREAM, IPPROTO_IP);
if (sListen < 0)
{
printf("Error: Call to socket(AF_INET, SOCK_STREAM, IPPROTO_IP); has failed.\n");
exit(1);
}
iPort = sPort;
addr.sin_family = AF_INET;
addr.sin_port = htons(iPort);
addr.sin_addr.s_addr = htonl(INADDR_ANY);
sListen = socket(AF_INET, SOCK_STREAM, IPPROTO_IP);
if (sListen < 0)
{
printf("Error: Call to socket(AF_INET, SOCK_STREAM, IPPROTO_IP); has failed.\n");
exit(1);
}
addr.sin_family = AF_INET;
addr.sin_port = htons(iPort);
addr.sin_addr.s_addr = htonl(INADDR_ANY);
ret = bind(sListen, (struct sockaddr *) &addr, sizeof(addr));
if(ret < 0)
{
printf("Error: Call to bind(sListen, (struct sockaddr *) &addr, sizeof(addr)); has failed.\n");
exit(1);
}
ret = listen(sListen, 10);
if(ret < 0)
{
printf("Error: Call to listen(sListen, 10); has failed.\n");
exit(1);
}
for(;;)
{
printf("Waiting for connection from a client...\n");
iAddrLen = sizeof(remote_addr); sClient = accept(sListen, (struct sockaddr *) &remote_addr, &iAddrLen); if(sClient < 0) { printf("Error: Call to accept(sListen, (struct sockaddr *) remote_addr, sizeof(remote_addr)); has failed.\n"); exit(1); } printf("%s has connected.\n\n", inet_ntoa(remote_addr.sin_addr)); if ((threadArgs = (struct ThreadArgs *) malloc(sizeof(struct ThreadArgs))) == NULL) { printf("Error: malloc() for threadArgs has failed.\n"); exit(1); } threadArgs -> sClient = sClient; printf ("sClient = %d, threadArgs -> sClient = %d\n", sClient, threadArgs -> sClient); if (pthread_create(&threadID, NULL, (THREAD_FUNC_PTR)&ServerTCP::ThreadMain, (void *)threadArgs) != 0) { printf("Error: pthread_create() has failed.\n"); exit(1); }
}
}
int main(int argc, const char* argv[])
{
ServerTCP serverTCP(5772);
serverTCP.waitConnections();
return 0;
}
Categories
- All Categories
- 50 LFX Mentorship
- 103 LFX Mentorship: Linux Kernel
- 576 Linux Foundation IT Professional Programs
- 304 Cloud Engineer IT Professional Program
- 125 Advanced Cloud Engineer IT Professional Program
- 53 DevOps Engineer IT Professional Program
- 61 Cloud Native Developer IT Professional Program
- 5 Express Training Courses
- 5 Express Courses - Discussion Forum
- 2K Training Courses
- 19 LFC110 Class Forum
- 7 LFC131 Class Forum
- 27 LFD102 Class Forum
- 157 LFD103 Class Forum
- 20 LFD121 Class Forum
- 1 LFD137 Class Forum
- 61 LFD201 Class Forum
- 1 LFD210 Class Forum
- LFD210-CN Class Forum
- 1 LFD213 Class Forum - Discontinued
- 128 LFD232 Class Forum
- LFD237 Class Forum
- 23 LFD254 Class Forum
- 611 LFD259 Class Forum
- 105 LFD272 Class Forum
- 1 LFD272-JP クラス フォーラム
- 1 LFD273 Class Forum
- 2 LFS145 Class Forum
- 24 LFS200 Class Forum
- 739 LFS201 Class Forum
- 1 LFS201-JP クラス フォーラム
- 11 LFS203 Class Forum
- 75 LFS207 Class Forum
- 300 LFS211 Class Forum
- 54 LFS216 Class Forum
- 47 LFS241 Class Forum
- 41 LFS242 Class Forum
- 37 LFS243 Class Forum
- 11 LFS244 Class Forum
- 36 LFS250 Class Forum
- 1 LFS250-JP クラス フォーラム
- LFS251 Class Forum
- 140 LFS253 Class Forum
- LFS254 Class Forum
- 1.1K LFS258 Class Forum
- 10 LFS258-JP クラス フォーラム
- 93 LFS260 Class Forum
- 132 LFS261 Class Forum
- 33 LFS262 Class Forum
- 80 LFS263 Class Forum
- 15 LFS264 Class Forum
- 11 LFS266 Class Forum
- 18 LFS267 Class Forum
- 17 LFS268 Class Forum
- 23 LFS269 Class Forum
- 203 LFS272 Class Forum
- 1 LFS272-JP クラス フォーラム
- LFS274 Class Forum
- LFS281 Class Forum
- 234 LFW211 Class Forum
- 172 LFW212 Class Forum
- 7 SKF100 Class Forum
- SKF200 Class Forum
- 902 Hardware
- 219 Drivers
- 74 I/O Devices
- 44 Monitors
- 115 Multimedia
- 209 Networking
- 101 Printers & Scanners
- 85 Storage
- 763 Linux Distributions
- 88 Debian
- 66 Fedora
- 15 Linux Mint
- 13 Mageia
- 24 openSUSE
- 142 Red Hat Enterprise
- 33 Slackware
- 13 SUSE Enterprise
- 357 Ubuntu
- 479 Linux System Administration
- 41 Cloud Computing
- 70 Command Line/Scripting
- Github systems admin projects
- 95 Linux Security
- 78 Network Management
- 108 System Management
- 49 Web Management
- 68 Mobile Computing
- 23 Android
- 30 Development
- 1.2K New to Linux
- 1.1K Getting Started with Linux
- 537 Off Topic
- 131 Introductions
- 217 Small Talk
- 21 Study Material
- 826 Programming and Development
- 278 Kernel Development
- 514 Software Development
- 928 Software
- 260 Applications
- 184 Command Line
- 3 Compiling/Installing
- 76 Games
- 316 Installation
- 62 All In Program
- 62 All In Forum
Upcoming Training
-
August 20, 2018
Kubernetes Administration (LFS458)
-
August 20, 2018
Linux System Administration (LFS301)
-
August 27, 2018
Open Source Virtualization (LFS462)
-
August 27, 2018
Linux Kernel Debugging and Security (LFD440)