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common.c
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common.c
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#include "common_impl.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
/**
* \brief Creating socket
*
* \param prop Protocoto to use, port_num Port number
* \return file descriptor
*/
//TODO
//int create_socket(int prop, int *port_num) //TODO verify usefullness prop
//{
/* fonction de creation et d'attachement */
/* d'une nouvelle socket */
/* renvoie le numero de descripteur */
/* et modifie le parametre port_num */
/*
int fd = 0;
struct sockaddr_in serv_addr;
//creation of the socket
fprintf(stdout,"Trying to connect with port_num %d\n",*port_num);
fd=socket(AF_INET,SOCK_STREAM,0);
memset(&serv_addr,0,sizeof(serv_addr));
serv_addr.sin_port=htons(*port_num);
serv_addr.sin_family=AF_INET;
serv_addr.sin_addr.s_addr=INADDR_ANY;
if (fd == -1) {
perror("socket");
exit(EXIT_FAILURE);
}
// attachement of the socket
if(bind(fd,(struct sockaddr*) &serv_addr, sizeof(serv_addr)) <0) {
perror("bind");
exit(EXIT_FAILURE);
}
return fd;*/
//}
//Rest of Joseph's code
/*while(connect(fd, (struct sockaddr *) & serv_addr, sizeof(serv_addr)) == -1)
printf("Socket %d connected in TCP/IP mode \n", fd);
{
perror("connect");
{ //Listenning socket
struct sockaddr_in addr_listen;
fd = socket(AF_INET, SOCK_STREAM, 0);
fprintf(stdout,"La socket %d est maintenant ouverte en mode TCP/IP\n", fd);
addr_listen.sin_family = AF_INET;
addr_listen.sin_port = htons(*port_num);
addr_listen.sin_addr.s_addr = INADDR_ANY;
while (bind(fd, (struct sockaddr *) &addr_listen, sizeof(addr_listen)) == -1)
{
perror("bind");
}
fprintf(stdout,"bind success\n");
if (listen(fd,listen_backlog) == -1)
{
perror("listen");
return -1;
}
fp*/
//Backup original
//{
/* fonction de creation et d'attachement */
/* d'une nouvelle socket */
/* renvoie le numero de descripteur */
/* et modifie le parametre port_num */
/*
int fd = 0;
struct sockaddr_in serv_addr;
memset(&serv_addr,0,sizeof(serv_addr));
serv_addr.sin_port=htons(0);
serv_addr.sin_family=AF_INET;
serv_addr.sin_addr.s_addr=INADDR_ANY;
fd=socket(AF_INET,SOCK_STREAM,0);
bind(fd, (struct sockaddr*) &serv_addr, sizeof(struct sockaddr_in));
*port_num=serv_addr.sin_port;
return fd;
*/
//}
/* Vous pouvez ecrire ici toutes les fonctions */
/* qui pourraient etre utilisees par le lanceur */
/* et le processus intermediaire. N'oubliez pas */
/* de declarer le prototype de ces nouvelles */
/* fonctions dans common_impl.h */
char** create_pool_hosts(char *filename, int *num_procs)
{
//Init
FILE* myfile = fopen(filename, "r");
if(myfile == NULL)
{
perror("Error opening file");
exit(EXIT_FAILURE);
}
int no_lines = 0;
char c = 0;
char **pool = NULL;
//Count number of lines
while( (c = fgetc(myfile)) != EOF) {
if (c == '\n') {
no_lines++;
}
}
//Allocate memory
pool = malloc(no_lines * sizeof(char *)); //possible improvement init the array with NULLs
for (int i = 0; i < no_lines; i++) {
pool[i] = malloc(MAX_LEN_HOSTNAME * sizeof(char));
memset(pool[i], '\0', MAX_LEN_HOSTNAME);
}
//Cursor back to init
rewind(myfile);
//Extract each line
for (int i = 0; i < no_lines; i++) {
fgets(pool[i], MAX_LEN_HOSTNAME, myfile);
pool[i][strlen(pool[i])-1] = '\0'; //remove the '\n' character captured
}
fclose(myfile);
//Output
*num_procs = no_lines;
return pool;
}
void destroy_pool_hosts(char **pool, int num_procs) {
for (int i = 0; i < num_procs; i++) {
free(pool[i]); //free each string
}
free(pool); //free array
}
/* utilities */
//TODO TMP replace by Joseph
int create_socket() {
int option = 1;
int sockfd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); //Sockets config: Blocking //TODO Possible to add SO_REUSEADDR with setsockopt() during dev phase testing...etc
setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &option, sizeof(option));
if (sockfd < 0) {
ERROR_EXIT("Error - socket opening");
}
return sockfd;
}
void do_send(int sockfd, char *buffer, int buffer_size) {
int progress = 0; //total sent
int sent = 0; //each try
do {
if ( (sent = send(sockfd, buffer+sent, buffer_size-sent, 0)) < 0 ) {
ERROR_EXIT("Error - send");
}
progress += sent;
} while(progress != buffer_size);
}
int do_recv(int sockfd, char *buffer, int buffer_size) {
int progress = 0; //total sent
int read = 0; //each try
do {
if ( (read = recv(sockfd, buffer+read, buffer_size-read, 0)) < 0 ) {
ERROR_EXIT("Error - recv");
}
progress += read;
} while(progress != buffer_size);
return progress;
}