nbillard/tsock_Abderrahman_Nathan
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tsock_v0.c
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/*test */
/* librairie standard ... */
#include <stdlib.h>
/* pour getopt */
#include <unistd.h>
/* déclaration des types de base */
#include <sys/types.h>
/* constantes relatives aux domaines, types et protocoles */
#include <sys/socket.h>
/* constantes et structures propres au domaine UNIX */
#include <sys/un.h>
/* constantes et structures propres au domaine INTERNET */
#include <netinet/in.h>
/* structures retournées par les fonctions de gestion de la base de
données du réseau */
#include <netdb.h>
/* pour les entrées/sorties */
#include <stdio.h>
/* pour la gestion des erreurs */
#include <errno.h>
#define DEFAULTPORT 9000
#define MSG_LENGTH 10
void usage(char* prog) {
printf("usage: %s [-p|-s][-u][-n ##]\n", prog);
}
void construire_message(char* message, char motif, int lg) {
for (int i = 0; i < lg; ++i) {
message[i] = motif;
}
message[lg] = '\0';
}
void recvudp(int sock, char* buffer, int buf_len, void* addr, unsigned int addr_len) {
int lg_recv = recvfrom(sock, buffer, buf_len, 0, (struct sockaddr*) addr, &addr_len);
if (lg_recv == -1) {
perror("Message could not be recieved, Error: ");
exit(1);
} else if (lg_recv < buf_len) {
fprintf(stderr, "Only %i from %i characters have been reviewed.", lg_recv, buf_len);
exit(1);
} else {
buffer[lg_recv] = '\0';
printf("message revieved: %s\n", buffer);
}
}
void sendudp(int sock, char* message, int msg_len, void* addr, unsigned int addr_len) {
int lg_sent = sendto(sock, message, msg_len, 0, (struct sockaddr*) addr, addr_len);
if (lg_sent == -1) {
perror("Message could not be sent, Error: ");
exit(1);
} else if (lg_sent < MSG_LENGTH) {
fprintf(stderr, "Only %i from %i characters have been sent.", lg_sent, MSG_LENGTH);
exit(1);
}
printf("message sent: %s\n", message);
}
void afficher_message(char* message, int lg) {
message[lg] = '\0';
printf("message construit: %s", message);
}
int main (int argc, char **argv)
{
int c;
extern char *optarg;
extern int optind;
int nb_message = -1; /* Nb de messages à envoyer ou à recevoir, par défaut : 10 en émission, infini en réception */
int source = -1 ; /* 0=puits, 1=source */
char* hostname;
int protocole = 0; /* 0=tcp, 1=udp */
int sock;
char* message;
struct hostent *hp;
struct sockaddr_in addr_local;
struct sockaddr_in addr_distant;
while ((c = getopt(argc, argv, "hu:pn:s")) != -1) {
switch (c) {
case 'h':
usage(argv[0]);
return 0;
case 'p':
if (source == 1) {
usage(argv[0]);
/* printf("usage: cmd [-p|-s][-n ##]\n"); */
exit(1);
}
source = 0;
break;
case 's':
if (source == 0) {
usage(argv[0]);
/* printf("usage: cmd [-p|-s][-n ##]\n"); */
exit(1) ;
}
source = 1;
break;
case 'n':
nb_message = atoi(optarg);
break;
case 'u':
protocole = 1;
printf("%s\n", optarg);
hostname = optarg;
/* hostname = malloc((strlen(optarg) + 1) * sizeof(char)); */
/* strcpy(hostname, optarg); */
break;
default:
usage(argv[0]);
/* printf("usage: cmd [-p|-s][-n ##]\n"); */
break;
}
}
if (source == -1) {
usage(argv[0]);
/* printf("usage: cmd [-p|-s][-n ##]\n"); */
exit(1) ;
}
if (source == 1)
printf("on est dans le source\n");
else
printf("on est dans le puits\n");
if (nb_message != -1) {
if (source == 1)
printf("nb de tampons à envoyer : %d\n", nb_message);
else
printf("nb de tampons à recevoir : %d\n", nb_message);
} else {
if (source == 1) {
nb_message = 10 ;
printf("nb de tampons à envoyer = 10 par défaut\n");
} else {
// changed envoyer to recevoir
printf("nb de tampons à recevoir = infini\n");
}
}
/* protocole = 0 (udp) 1(tcp) */
if (!protocole) /* if (tcp activated) */ {
printf("TCP not implemented\n");
return 0;
} else {
printf("using udp\n");
}
/* if (protocole) /\* udp *\/ { */
sock = socket(AF_INET, SOCK_DGRAM, 0);
/* } else { */
/* sock = socket(AF_INET, SOCK_STREAM, 0); */
/* } */
if (sock < 0) {
perror("Error creating socket:");
exit(1);
}
printf("socket created\n");
memset(&addr_local, 0, sizeof(addr_local));
addr_local.sin_family = AF_INET;
addr_local.sin_port = DEFAULTPORT;
addr_local.sin_addr.s_addr = INADDR_ANY;
printf("address built\n");
if (bind(sock, (struct sockaddr*) &addr_local, (sizeof(addr_local))) < 0 ) {
perror("Error while binding socket: ");
exit(1);
}
memset(&addr_distant, 0, sizeof(addr_local));
addr_distant.sin_family = AF_INET;
addr_distant.sin_port = DEFAULTPORT;
printf("%s\n", hostname);
hp = gethostbyname(hostname);
if (hp == NULL) {
printf("hosname not found\n");
/* herror("Error: "); */
exit(1);
}
printf("hostname found\n");
memcpy(&addr_distant.sin_addr.s_addr, hp->h_addr, hp->h_length);
printf("socket bound\n");
message = malloc((MSG_LENGTH + 1) * sizeof(char));
if (source) {
construire_message(message, 'a', MSG_LENGTH);
if (nb_message < 0) {
while (1) {
sendudp(sock, message, MSG_LENGTH, &addr_distant, sizeof(addr_distant));
}
} else {
for (int i = 0; i < nb_message; ++i) {
sendudp(sock, message, MSG_LENGTH, &addr_distant, sizeof(addr_distant));
}
}
} else {
if (nb_message < 0) {
while (1) {
recvudp(sock, message, MSG_LENGTH, &addr_distant, sizeof(addr_distant));
}
} else {
for (int i = 0; i < nb_message; ++i) {
recvudp(sock, message, MSG_LENGTH, &addr_distant, sizeof(addr_distant));
}
}
printf("puit not implemented\n");
}
if (close(sock) < 0) {
perror("Error closing socket:");
exit(1);
}
return 0;
}