Se incluye funcion de ejemplo que escucha cierto puerto UDP, luego de

recibir el jpg lo dibuja en pantalla.

src/Tarea2-RC-Grupo25-Cliente.cpp

@@ -9,7 +9,94 @@
 #include <iostream>
 using namespace std;
 
+#include <unistd.h>
+#include<stdio.h> //printf
+#include<string.h> //memset
+#include<stdlib.h> //exit(0);
+#include<arpa/inet.h>
+#include<sys/socket.h>
+
+#include <opencv2/opencv.hpp>
+using namespace cv;
+
+#define BUFLEN 1024*1024  //Max length of buffer
+#define PORT 8890   //The port on which to listen for incoming data
+
 int main() {
 	cout << "!!!Hello World!!!" << endl; // prints !!!Hello World!!!
 	return 0;
 }
+
+void die(char *s)
+{
+    perror(s);
+    exit(1);
+}
+
+/**
+ * Queda escuchando en el puerto UDP indicado.
+ *
+ */
+int pruebaRecibirUDP(){
+    struct sockaddr_in si_me, si_other;
+
+    int s, slen = sizeof(si_other) , recv_len;
+    char buf[BUFLEN];
+
+    //create a UDP socket
+    if ((s=socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) == -1)
+    {
+        die("socket");
+    }
+
+    // zero out the structure
+    memset((char *) &si_me, 0, sizeof(si_me));
+
+    si_me.sin_family = AF_INET;
+    si_me.sin_port = htons(PORT);
+    si_me.sin_addr.s_addr = htonl(INADDR_ANY);
+
+    //bind socket to port
+    if( bind(s , (struct sockaddr*)&si_me, sizeof(si_me) ) == -1)
+    {
+        die("bind");
+    }
+
+    socklen_t server_addr_size = sizeof si_other;
+
+    //keep listening for data
+    while(1)
+    {
+        printf("Waiting for data...");
+        fflush(stdout);
+
+        //try to receive some data, this is a blocking call
+        if ((recv_len = recvfrom(s, buf, BUFLEN, 0, (struct sockaddr *) &si_other, &server_addr_size)) == -1)
+        {
+            die("recvfrom()");
+        }
+
+        //print details of the client/peer and the data received
+        printf("\nReceived packet from %s:%d\n", inet_ntoa(si_other.sin_addr), ntohs(si_other.sin_port));
+        printf("Tamanio Data: %d\n", sizeof(buf));
+
+        namedWindow("cliente", CV_WINDOW_AUTOSIZE);
+
+        Mat rawData = Mat(1, sizeof(buf), CV_8UC1, buf);
+        Mat frame = imdecode(rawData, CV_LOAD_IMAGE_COLOR);
+
+        imshow("cliente", frame);
+        waitKey(1000/30);
+
+        //now reply the client with the same data
+        /*
+        if (sendto(s, buf, recv_len, 0, (struct sockaddr*) &si_other, slen) == -1)
+        {
+            die("sendto()");
+        }
+        */
+    }
+
+    close(s);
+    return 0;
+}