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- ============================= Client ==========================
- #include <fcntl.h>
- #include <string.h>
- #include <stdlib.h>
- #include <errno.h>
- #include <stdio.h>
- #include <netinet/in.h>
- #include <resolv.h>
- #include <sys/socket.h>
- #include <arpa/inet.h>
- #include <unistd.h>
- int main(int argv, char** argc){
- int host_port= 20;
- char* host_name="127.0.0.1";
- struct sockaddr_in my_addr;
- char buffer[1024];
- int bytecount;
- int buffer_len=0;
- int hsock;
- int * p_int;
- int err;
- hsock = socket(AF_INET, SOCK_STREAM, 0);
- if(hsock == -1){
- printf("Error initializing socket %d\n",errno);
- goto FINISH;
- }
- p_int = (int*)malloc(sizeof(int));
- *p_int = 1;
- if( (setsockopt(hsock, SOL_SOCKET, SO_REUSEADDR, (char*)p_int, sizeof(int)) == -1 )||
- (setsockopt(hsock, SOL_SOCKET, SO_KEEPALIVE, (char*)p_int, sizeof(int)) == -1 ) ){
- printf("Error setting options %d\n",errno);
- free(p_int);
- goto FINISH;
- }
- free(p_int);
- my_addr.sin_family = AF_INET ;
- my_addr.sin_port = htons(host_port);
- memset(&(my_addr.sin_zero), 0, 8);
- my_addr.sin_addr.s_addr = inet_addr(host_name);
- if( connect( hsock, (struct sockaddr*)&my_addr, sizeof(my_addr)) == -1 ){
- if((err = errno) != EINPROGRESS){
- fprintf(stderr, "Error connecting socket %d\n", errno);
- goto FINISH;
- }
- }
- buffer_len = 1024;
- memset(buffer, '\0', buffer_len);
- printf("Enter some text to send to the server (press enter)\n");
- fgets(buffer, 1024, stdin);
- buffer[strlen(buffer)-1]='\0';
- if( (bytecount=send(hsock, buffer, strlen(buffer),0))== -1){
- fprintf(stderr, "Error sending data %d\n", errno);
- goto FINISH;
- }
- printf("Sent bytes %d\n", bytecount);
- if((bytecount = recv(hsock, buffer, buffer_len, 0))== -1){
- fprintf(stderr, "Error receiving data %d\n", errno);
- goto FINISH;
- }
- printf("Recieved bytes %d\nReceived string \"%s\"\n", bytecount, buffer);
- close(hsock);
- FINISH:
- ;
- }
- ===================== Server ===============
- #include <fcntl.h>
- #include <string.h>
- #include <stdlib.h>
- #include <errno.h>
- #include <stdio.h>
- #include <netinet/in.h>
- #include <resolv.h>
- #include <sys/socket.h>
- #include <arpa/inet.h>
- #include <unistd.h>
- #include <pthread.h>
- #include <time.h>
- void WriteLogFile(const char* szString)
- {
- //#IFDEF DEBUG
- FILE* pFile = fopen("logFile.txt", "a");
- fprintf(pFile, "%s\n",szString);
- fclose(pFile);
- char buff[20];
- struct tm *sTm;
- time_t now = time (0);
- sTm = gmtime (&now);
- strftime (buff, sizeof(buff), "%Y-%m-%d %H:%M:%S", sTm);
- printf ("%s %s\n", buff, "");
- // return 0;
- //#ENDIF
- }
- void* SocketHandler(void*);
- int main(int argv, char** argc){
- int host_port= 20;
- struct sockaddr_in my_addr;
- int hsock;
- int * p_int ;
- int err;
- socklen_t addr_size = 0;
- int* csock;
- sockaddr_in sadr;
- pthread_t thread_id=0;
- hsock = socket(AF_INET, SOCK_STREAM, 0);
- if(hsock == -1){
- printf("Error initializing socket %d\n", errno);
- goto FINISH;
- }
- p_int = (int*)malloc(sizeof(int));
- *p_int = 1;
- if( (setsockopt(hsock, SOL_SOCKET, SO_REUSEADDR, (char*)p_int, sizeof(int)) == -1 )||
- (setsockopt(hsock, SOL_SOCKET, SO_KEEPALIVE, (char*)p_int, sizeof(int)) == -1 ) ){
- printf("Error setting options %d\n", errno);
- free(p_int);
- goto FINISH;
- }
- free(p_int);
- my_addr.sin_family = AF_INET ;
- my_addr.sin_port = htons(host_port);
- memset(&(my_addr.sin_zero), 0, 8);
- my_addr.sin_addr.s_addr = INADDR_ANY ;
- if( bind( hsock, (sockaddr*)&my_addr, sizeof(my_addr)) == -1 ){
- fprintf(stderr,"Error binding to socket, make sure nothing else is listening on this port %d\n",errno);
- goto FINISH;
- }
- if(listen( hsock, 10) == -1 ){
- fprintf(stderr, "Error listening %d\n",errno);
- goto FINISH;
- }
- addr_size = sizeof(sockaddr_in);
- while(true){
- printf("waiting for a connection\n");
- csock = (int*)malloc(sizeof(int));
- if((*csock = accept( hsock, (sockaddr*)&sadr, &addr_size))!= -1){
- printf("---------------------\nReceived connection from %s\n",inet_ntoa(sadr.sin_addr));
- WriteLogFile("---------------------\nReceived connection from IP Address: ");
- WriteLogFile(inet_ntoa(sadr.sin_addr));
- pthread_create(&thread_id,0,&SocketHandler, (void*)csock );
- pthread_detach(thread_id);
- }
- else{
- fprintf(stderr, "Error accepting %d\n", errno);
- }
- }
- FINISH:
- ;
- }
- void* SocketHandler(void* lp){
- int *csock = (int*)lp;
- char buffer[100];
- int buffer_len = 100;
- int bytecount;
- memset(buffer, 0, buffer_len);
- if((bytecount = recv(*csock, buffer, buffer_len, 0))== -1){
- fprintf(stderr, "Error receiving data %d\n", errno);
- goto FINISH;
- }
- printf("Received bytes %d\nReceived string \"%s\"\n", bytecount, buffer);
- WriteLogFile(buffer);
- strcat(buffer, " On Server");
- if((bytecount = send(*csock, buffer, strlen(buffer), 0))== -1){
- fprintf(stderr, "Error sending data %d\n", errno);
- goto FINISH;
- }
- printf("Sent bytes %d\n", bytecount);
- FINISH:
- free(csock);
- return 0;
- }
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