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| #include <netinet/in.h>
#include <sys/socket.h>
#include <fcntl.h>
#include <sys/select.h>
#include <assert.h>
#include <signal.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
//#include "common.h"
#include "store.h"
#define BUF_LEN ( 6 + MAX_KEY_LEN + MAX_VALUE_LEN + 1 )
#define BLANK(buf,len) memset( (buf), 0, (len) )
/* A connection was accepted, waiting for the command */
#define READING 0
/* Received the command, must send the answer */
#define WRITING 1
/* Sending the result (WRITING should be true) */
#define RESULT 2
/* Sending the result (WRITING should be true) */
#define ERROR 4
/* The connection can be closed */
#define DONE 8
//===========================//
//file descriptor state management.
//remember, INDEX of the FDState
//container is the magic word.
typedef struct {
char buffer[BUF_LEN];
int end;
int cur;
int status;
} FDState;
void resetState( FDState *state ) {
//initialize state.
FD_ZERO(&state);
state = READING;
//default status is READING
}
FDState *allocFDState() {
FDState *state;
state = malloc(sizeof(FDState));
//allocate wrapper
return state;
}
void freeFDState(FDState *state) {
free(state);
//clean up wrapper
}
FDState *states[FD_SETSIZE]; //state container as described in TP7 giveaway
//===========================//
int listener; //the main listener file descriptor for the server socket - non blocking property for all connections derived from this one after you set it.
Store *store;
void setNonBlocking(int fd) {
int flags = fcntl(fd, F_GETFL, 0); //Prend les flags utilisés par fd
if(fcntl(fd, F_SETFL, flags|O_NONBLOCK) < 0){ //Set les anciens flags et les flags non bloquant
if(errno == EAGAIN || errno == EWOULDBLOCK)
fprintf(stderr, "Socket : Toutes les sockets sont utiliséss\n"); //Affiche si il y a une erreur
}
}
int receiveCommand(int fd, FDState *state)
{
char buffer[BUF_LEN];
ssize_t nread;
while(1) {
nread = read( fd, buffer, BUF_LEN );
if( nread < 0 ) {
perror( "Reading fifo failed ");
exit(EXIT_FAILURE);
}
}
return 0;
//read from socket here
// return 0 for success
//return -1 for failure
}
int sendResult( int fd, FDState *state, Store *store )
{
char buffer[BUF_LEN];
ssize_t nread, nwrit;
nwrit = write( STDOUT_FILENO, buffer, nread );
if( nwrit != nread ) {
perror( "Writing to STDOUT failed" );
exit(EXIT_FAILURE);
}
return 0;
//write to socket here
// return 0 for success
//return -1 for failure
}
void run( int port )
{
struct sockaddr_in serveur;
listener = socket(AF_INET, SOCK_STREAM, 0);
serveur.sin_family = AF_INET;
serveur.sin_addr.s_addr = htonl(INADDR_ANY);
serveur.sin_port = htons(port);
ssize_t nread; //
if (bind(listener, (struct sockaddr *) &serveur, sizeof(serveur)) < 0) {
printf(strerror(errno));
exit(EXIT_FAILURE);
}
listen(listener, 3);
while (1) {
char client_message[2000];
char tmp_message[200];
int read_size;
strcpy(tmp_message, "Message recieved");
struct sockaddr_in client;
unsigned int clientLength = sizeof(client);
int clientSock = accept(listener, (struct sockaddr *) &client, &clientLength);
printf("\nConnexion with success\n");
read_size = recv(clientSock, client_message, strlen(client_message), 0);
write(clientSock, tmp_message, strlen(tmp_message));
if(read_size == 0) {
printf("\nClient disconnected\n");
}
if( nread == 0 ) { //
printf( "Received End-Of-File\n" );
break;
}
else if(read_size = -1) {
exit(EXIT_FAILURE);
}
}
//here is where the magic happens.
//check the TP7 "inside your run_server function
//handle ALL ERRORS
}
void shutdownServer( int signum )
{
resetState(states);
freeFDState(*states);
//signal callback
//do your clean-up here.
exit(EXIT_SUCCESS);
}
int main(int argc, char **argv)
{
int port = 9998;
if( argc == 2 )
{
port = atoi( argv[1] );
}
Store *store = NULL;
store = openStore("journal.txt");
run(port);
//1) prepare sigaction and callback
//2) open the store
//3) run the server
} |
Aide pour la création d'un serveur
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