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He estado investigando por la red y después de leer, leeeer y leeeeeer.... he cogido unos codes por la red y los he "troleado", en lado server uso OS X y en lado cliente uso Debian...
Os posteo los codes
////////////////////SERVER//////////////////////
////////////////////////////////////////////////
// Ejemplo de sockets en Linux que mandan y reciben datagramas UDP
#include <stdio.h>
#include <stdlib.h>
// Estas cabeceras son necesarias para los 'sockets'
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/time.h> // Usado por 'timeval'
#include <netdb.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h> // Usado por 'close'
#include <string.h> // Usado por 'strlen'
#define PORT 25555
#define BUFSIZE 1024
int main(int argc, char *argv[])
{
struct sockaddr_in myaddr; /* our address */
struct sockaddr_in remaddr; /* remote address */
socklen_t addrlen = sizeof(remaddr); /* length of addresses */
int recvlen; /* # bytes received */
int fd; /* our socket */
unsigned char buf[BUFSIZE]; /* receive buffer */
/* create a UDP socket */
if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
perror("cannot create socket\n");
return 0;
}
/* bind the socket to any valid IP address and a specific port */
memset((char *)&myaddr, 0, sizeof(myaddr));
myaddr.sin_family = AF_INET;
myaddr.sin_addr.s_addr = htonl(INADDR_ANY);
myaddr.sin_port = htons(PORT);
if (bind(fd, (struct sockaddr *)&myaddr, sizeof(myaddr)) < 0) {
perror("bind failed");
return 0;
}
/* now loop, receiving data and printing what we received */
for (;
{printf("waiting on port %d\n", PORT);
recvlen = recvfrom(fd, buf, BUFSIZE, 0, (struct sockaddr *)&remaddr, &addrlen);
printf("received %d bytes\n", recvlen);
if (recvlen > 0) {
buf[recvlen] = 0;
printf("received message: \"%s\"\n", buf);
}
}
/* never exits */
}
//////////////////CLIENT///////////////////
///////////////////////////////////////////
// Ejemplo de sockets en Linux que mandan y reciben datagramas UDP
#include <stdio.h>
#include <stdlib.h>
// Estas cabeceras son necesarias para los 'sockets'
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/time.h> // Usado por 'timeval'
#include <netdb.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h> // Usado por 'close'
#include <string.h> // Usado por 'strlen'
#define PORT 25555
#define BUFFER_LEN 1024
int main(int argc, char *argv[])
{
char *host = "192.168.1.102";
int port=PORT;
int socketfd;
if( (socketfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0){
perror("cannot create socket");
return 0;
}
struct sockaddr_in myaddr;
/* bind to an arbitrary return address */
/* because this is the client side, we don't care about the address */
/* since no application will initiate communication here - it will */
/* just send responses */
/* INADDR_ANY is the IP address and 0 is the socket */
/* htonl converts a long integer (e.g. address) to a network representation */
/* htons converts a short integer (e.g. port) to a network representation */
memset((char *)&myaddr, 0, sizeof(myaddr));
myaddr.sin_family = AF_INET;
myaddr.sin_addr.s_addr = htonl(INADDR_ANY);
myaddr.sin_port = htons(0);
if (bind(socketfd, (struct sockaddr *)&myaddr, sizeof(myaddr)) < 0) {
perror("bind failed");
return 0;
}
struct hostent *hp; /* host information */
struct sockaddr_in servaddr; /* server address */
char *my_message = "this is a test message";
/* fill in the server's address and data */
memset((char*)&servaddr, 0, sizeof(servaddr));
servaddr.sin_family = AF_INET;
servaddr.sin_port = htons(port);
/* look up the address of the server given its name */
hp = gethostbyname(host);
if (!hp) {
fprintf(stderr, "could not obtain address of %s\n", host);
return 0;
}
/* put the host's address into the server address structure */
memcpy((void *)&servaddr.sin_addr, hp->h_addr_list[0], hp->h_length);
/* send a message to the server */
if (sendto(socketfd, &my_message, strlen(my_message), 0, (struct sockaddr *)&servaddr, sizeof(servaddr)) < 0) {
perror("sendto failed");
return 0;
}
}
El lado server parece que hace lo que debe, pero el lado client no, en Deban me da error al crear el bind, pero si los invierto, es decir client OS X y server Debian no me da error pero no llega nada :huy:
¿¿Alguein me podría decir donde falla?? Gracias y un saludo!
En línea
