UDP - ECHO - SERVIDOR

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/in.h>

#define PORT 8080
#define MAX_SIZE 100

int main() {
    int sockfd;
    char msg[MAX_SIZE];
    struct sockaddr_in servaddr, cliaddr;

    sockfd = socket(AF_INET, SOCK_DGRAM, 0);

    memset(&servaddr, 0, sizeof(servaddr));
    memset(&cliaddr, 0, sizeof(cliaddr));

    servaddr.sin_family = AF_INET;
    servaddr.sin_addr.s_addr = INADDR_ANY;
    servaddr.sin_port = htons(PORT);

    bind(sockfd, (const struct sockaddr *)&servaddr, sizeof(servaddr));

    while(1){
      int len = sizeof(cliaddr);
      recvfrom(sockfd, (char*) msg, MAX_SIZE,  0, (struct sockaddr *) &cliaddr, (socklen_t *) &len);
      if(msg[0] == '#') break;
      sendto(sockfd, (char*) msg,  strlen(msg), 0, (struct sockaddr *) &cliaddr, len);
      printf("Received and set: %s\n", msg);
    }
    close(sockfd);

    return 0;
}