diff --git a/P8/prueba.c b/P8/prueba.c
new file mode 100644
index 0000000000000000000000000000000000000000..e7b30e4fa1fe745e1345fdae3c194a01808122f7
--- /dev/null
+++ b/P8/prueba.c
@@ -0,0 +1,200 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include <netinet/in.h>
+#include <sys/time.h>
+#include "ip-icmp.h"
+
+#define ICMP_TIMESTAMP 13
+#define ICMP_TIMESTAMP_REPLY 14
+#define TIMEOUT 5
+
+void crearICMPRequest(TimeStamp *icmp_msg);
+unsigned short checksum(void *b, int len);
+void imprimeError(unsigned char type, unsigned char code);
+
+int main(int argc, char *argv[]) {
+ if (argc < 2 || argc > 3) {
+ fprintf(stderr, "Uso: %s ip [-v]\n", argv[0]);
+ exit(EXIT_FAILURE);
+ }
+
+ int verbose = (argc == 3 && strcmp(argv[2], "-v") == 0);
+ const char *ip = argv[1];
+ int sockfd;
+ struct sockaddr_in dest_addr, local_addr;
+
+ // Crear socket RAW para ICMP
+ sockfd = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP);
+ if (sockfd < 0) {
+ perror("Error al crear el socket");
+ exit(EXIT_FAILURE);
+ }
+
+ // Configurar dirección local y hacer bind()
+ memset(&local_addr, 0, sizeof(local_addr));
+ local_addr.sin_family = AF_INET;
+ local_addr.sin_addr.s_addr = INADDR_ANY;
+ local_addr.sin_port = 0;
+
+ if (bind(sockfd, (struct sockaddr *)&local_addr, sizeof(local_addr)) < 0) {
+ perror("Error al hacer bind del socket");
+ close(sockfd);
+ exit(EXIT_FAILURE);
+ }
+
+ // Configurar dirección de destino
+ memset(&dest_addr, 0, sizeof(dest_addr));
+ dest_addr.sin_family = AF_INET;
+ dest_addr.sin_port = 0;
+ if (inet_pton(AF_INET, ip, &dest_addr.sin_addr) <= 0) {
+ perror("Error al convertir la dirección IP");
+ close(sockfd);
+ exit(EXIT_FAILURE);
+ }
+
+ // Construir el mensaje ICMP
+ TimeStamp icmp_msg;
+ crearICMPRequest(&icmp_msg);
+
+ if (verbose) {
+ printf("-> Type: %d\n", icmp_msg.icmpHdr.type);
+ printf("-> Code: %d\n", icmp_msg.icmpHdr.code);
+ printf("-> PID : %d\n", icmp_msg.pid);
+ printf("-> Seq Numbr: %d\n", ntohs(icmp_msg.sequence));
+ printf("-> Originate: %u ms\n", icmp_msg.originate);
+ printf("-> Receive: 0 ms\n");
+ printf("-> Transmit: 0 ms\n");
+ printf("-> Tamanyo del Datagrama: %ld bytes\n", sizeof(TimeStamp));
+ }
+
+ printf("-> Enviando Datagrama ICMP a Destino con IP: %s\n", ip);
+ if (sendto(sockfd, &icmp_msg, sizeof(icmp_msg), 0, (struct sockaddr *)&dest_addr, sizeof(dest_addr)) < 0) {
+ perror("Error al enviar el datagrama");
+ close(sockfd);
+ exit(EXIT_FAILURE);
+ }
+ printf("-> Timestamp Request enviado correctamente...\n");
+
+ // Configurar timeout
+ fd_set readfds;
+ FD_ZERO(&readfds);
+ FD_SET(sockfd, &readfds);
+
+ struct timeval timeout = {TIMEOUT, 0};
+ if (select(sockfd + 1, &readfds, NULL, NULL, &timeout) < 0) {
+ perror("Error en select");
+ close(sockfd);
+ exit(EXIT_FAILURE);
+ }
+
+ if (!FD_ISSET(sockfd, &readfds)) {
+ printf("-> Tiempo de espera agotado para %s\n", ip);
+ close(sockfd);
+ exit(EXIT_FAILURE);
+ }
+
+ // Recibir respuesta
+ TimeStampReply recv_reply;
+ socklen_t addr_len = sizeof(dest_addr);
+ if (recvfrom(sockfd, &recv_reply, sizeof(recv_reply), 0, (struct sockaddr *)&dest_addr, &addr_len) < 0) {
+ perror("Error al recibir el datagrama");
+ close(sockfd);
+ exit(EXIT_FAILURE);
+ }
+
+ printf("\n-> Timestamp Reply recibido desde %s\n", ip);
+ if (recv_reply.icmpMsg.icmpHdr.type == ICMP_TIMESTAMP_REPLY && recv_reply.icmpMsg.icmpHdr.code == 0) {
+ int originate = recv_reply.icmpMsg.originate;
+ int receive = recv_reply.icmpMsg.receive;
+ int transmit = recv_reply.icmpMsg.transmit;
+
+ struct timeval end_time;
+ gettimeofday(&end_time, NULL);
+ int t4 = (end_time.tv_sec * 1000) + (end_time.tv_usec / 1000);
+ int rtt = (receive - originate) + (t4 - transmit);
+
+ if (verbose) {
+ printf("-> Originate: %u ms\n", originate);
+ printf("-> Receive: %u ms\n", receive);
+ printf("-> Transmit: %u ms\n", transmit);
+ printf("-> RTT: %u ms\n", rtt);
+ printf("-> TTL: %d\n", recv_reply.ipHdr.TTL);
+ printf("-> Tamanyo del Datagrama: %ld bytes\n", sizeof(TimeStampReply));
+ }
+
+ printf("-> Respuesta Correcta (Type %d, Code %d)\n", recv_reply.icmpMsg.icmpHdr.type, recv_reply.icmpMsg.icmpHdr.code);
+ } else {
+ imprimeError(recv_reply.icmpMsg.icmpHdr.type, recv_reply.icmpMsg.icmpHdr.code);
+ }
+
+ close(sockfd);
+ return EXIT_SUCCESS;
+}
+
+void crearICMPRequest(TimeStamp *icmp_msg) {
+ memset(icmp_msg, 0, sizeof(TimeStamp));
+ icmp_msg->icmpHdr.type = ICMP_TIMESTAMP;
+ icmp_msg->icmpHdr.code = 0;
+ icmp_msg->pid = getpid();
+ icmp_msg->sequence = htons(0);
+
+ struct timeval start_time;
+ gettimeofday(&start_time, NULL);
+ icmp_msg->originate = (start_time.tv_sec * 1000) + (start_time.tv_usec / 1000);
+ icmp_msg->icmpHdr.checksum = 0; // Inicializar el campo checksum a 0.
+ icmp_msg->icmpHdr.checksum = checksum(icmp_msg, sizeof(TimeStamp));
+}
+
+// Función para calcular el checksum
+unsigned short checksum(void *b, int len) {
+ unsigned short *buf = b;
+ unsigned int sum = 0; // Paso 4: Acumulador inicializado a 0.
+
+ // Paso 2: Calcular el número de palabras de 16 bits.
+ int half_words = len / 2;
+
+ // Paso 5: Recorrer el datagrama sumando palabras de 16 bits.
+ while (half_words > 0) {
+ sum += *buf++; // Sumar la palabra actual al acumulador.
+ half_words--; // Reducir el contador de palabras.
+ }
+
+ // Si queda un byte adicional (longitud impar), procesarlo.
+ if (len % 2 == 1) {
+ sum += *(unsigned char *)buf; // Sumar el último byte como un short.
+ }
+
+ // Sumar las partes alta y baja del acumulador (1ª vez).
+ sum = (sum >> 16) + (sum & 0xFFFF);
+
+ // Sumar nuevamente las partes alta y baja del acumulador (2ª vez).
+ sum += (sum >> 16);
+
+ // Complemento a uno.
+ return (unsigned short)(~sum);
+}
+
+void imprimeError(unsigned char type, unsigned char code) {
+ switch (type) {
+ case 3: // Destination Unreachable
+ printf("-> Destination Unreachable: ");
+ switch (code) {
+ case 0: printf("Net Unreachable\n"); break;
+ case 1: printf("Host Unreachable\n"); break;
+ case 2: printf("Protocol Unreachable\n"); break;
+ case 3: printf("Port Unreachable\n"); break;
+ default: printf("Unknown Code\n"); break;
+ }
+ break;
+ case 11:
+ printf("-> Time Exceeded\n");
+ break;
+ default:
+ printf("-> ICMP Error: Type %d, Code %d\n", type, code);
+ break;
+ }
+}