Newer
Older
#include <arpa/inet.h>
#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <opencv2/highgui/highgui_c.h>
#include <pthread.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <unistd.h>
#include <cstdio>
#define UDP_PORT 9998
#define TCP_PORT 9999
#define STR_HELPER(x) #x
#define STR(x) STR_HELPER(x)
#define MAXLEN 1048576 //1024*1024
using namespace cv;
const char delimiter[] = "Grupo25";
const int keepAliveIntervalSeconds = 30;
// DEFINICION DE FUNCIONES
int printFrame(int received_data_size, char* recibido, int fin, char* buf);
void printFrameUDP(char* jpg);
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
void TCP(const char* HOST);
void UDP(char* HOSTNAME);
int sendDatagramUDPtoHostname(int socket, char* HOSTNAME, char* buffer, unsigned short int destinationPort);
const char* getIP(char* hostname);
void error(const char *);
void* keepAliveMethod(void* ptr);
struct keepAliveData{
int keepAliveId;
int socketId;
char* ip;
};
/**
* Funcion auxiliar que retorna dentro del array indicando la posicion del comienzo del delimitador
* array: arreglo a consultar
* len: largo de array
* delimiter: delimitador a buscar
* inicio: desde que posicion arrancar a buscar
*/
int findPosDelimiter(const char *array, int len, int inicio) {
int i = -1;
int pos = 0;
for (i = inicio; i<len; i++){
if (sizeof(delimiter)-1 == pos)
if (array[i] == delimiter[pos])
return i - sizeof(delimiter) + 2;
else
pos=0;
else
if (array[i] == delimiter[pos])
pos++;
else
pos=0;
}
return -1;
}
void TCP(const char* HOST){
int client_socket = socket(AF_INET, SOCK_STREAM, 0);
//obtenemos la direccion con getaddrinfo
struct addrinfo hints, *res;
memset(&hints, 0, sizeof hints);
hints.ai_family = AF_INET;
hints.ai_socktype = SOCK_STREAM;
getaddrinfo(HOST, STR(TCP_PORT), &hints, &res);
printf("Intentando conexion con %s:%d ...\n",HOST,TCP_PORT);
//primitiva CONNECT
if (connect(client_socket, res->ai_addr, res->ai_addrlen)<0){
printf("Error, imposible establecer conexion con el servidor.\n");
return;
}
//primitiva SEND
char msg[4];
sprintf(msg, "%s", "TCP");
msg[3] = '\0';
int msg_size = strlen(msg);
int sent_msg_size = send(client_socket, msg, msg_size, 0);
if (sent_msg_size == -1) {
printf("Error, imposible establecer conexion con el servidor.\n");
printf("Conexion establecida.\n");
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
char buf[MAXLEN]; // se almacenan los datos TCP recibidos en cada recv
char recibido[MAXLEN]; // mantiene el historico de datos recibidos, quitando los frames ya dibujados
int fin = 0; // Mantiene el indice del array recibido.
int received_data_size = 1;
while(received_data_size > 0)
{
int data_size = MAXLEN;
received_data_size = recv(client_socket, buf, data_size, 0);
fin = printFrame( received_data_size, recibido, fin, buf);
}
close(client_socket);
freeaddrinfo(res);
}
int printFrame(int received_data_size, char* recibido, int fin, char* buf){
printf("Datos recibidos: %d\n", received_data_size);
// en el arrray 'recibido' se mantiene los datos que ya exisitian mas los nuevos.
for(int j = 0; j < received_data_size; j++)
recibido[fin+j] = buf[j];
fin += received_data_size;
int inicio = 0;
int found = -1;
while ((found = findPosDelimiter(recibido, fin+1, inicio)) != -1) {
char jpg[found-inicio];
for (int h = 0; h < found-inicio; h++)
jpg[h] = recibido[inicio+h];
printf("Nuevo jpeg size: %li\n", sizeof(jpg));
namedWindow("cliente", CV_WINDOW_AUTOSIZE);
Mat rawData = Mat(1, found, CV_8UC1, jpg);
Mat frame = imdecode(rawData, CV_LOAD_IMAGE_COLOR);
imshow("cliente", frame);
inicio = found + sizeof(delimiter)-1;
}
if (inicio != 0) {
// mueve los datos recibidos al inicio, quitando el (o los) frame dibujado y el delimitador
for (int d = inicio; d < fin+1; d++)
recibido[d-inicio] = recibido[d];
fin -= inicio;
}
return fin;
}
void printFrameUDP(char* jpg, int size){
printf("Nuevo jpeg size: %d\n", size);
namedWindow("cliente", CV_WINDOW_AUTOSIZE);
Mat rawData = Mat(1, size, CV_8UC1, jpg);
Mat frame = imdecode(rawData, CV_LOAD_IMAGE_COLOR);
imshow("cliente", frame);
waitKey(30);
}
void UDP(char* HOSTNAME){
unsigned int length;
struct from;
// CREATE SOCKET
int sock = socket(AF_INET, SOCK_DGRAM, 0);
if (sock < 0) error("error when creating socket");
char buffer[256];
bzero(buffer,256);
sprintf(buffer, "subscription");
// ENVIO PEDIDO DE SUSCRIPCION
printf("Enviando Suscripcion a %s:%d ...\n", HOSTNAME, UDP_PORT); ::fflush(stdout);
if (sendDatagramUDPtoHostname(sock, HOSTNAME, buffer, UDP_PORT) < 0)
error("Error on send first datagram");
// ESPERO RESPUESTA DEL SERVIDOR
struct timeval timeout;
timeout.tv_sec = 5;
timeout.tv_usec = 0;
setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, &timeout, sizeof(timeout));
bzero(buffer,256);
struct sockaddr_in from;
if (recvfrom(sock,buffer,256,0,(struct sockaddr *)&from, &length) < 0){
if ((errno == EAGAIN) || (errno == EWOULDBLOCK)){
printf("Error, no hay respuesta del servidor.\n");
return;
}else{
printf("Error al recibir datos.\n");
return;
}
}else
printf("Listo");
printf("Subscription: %s\n", buffer);
char* keepAliveId = new char[3];
keepAliveId[0] = buffer[9];
keepAliveId[1] = buffer[10];
keepAliveId[2] = '\0';
printf("keepAliveId is : %s\n", keepAliveId);
keepAliveData* kaData = new (keepAliveData);
kaData->keepAliveId = atoi(keepAliveId);
kaData->socketId = sock;
kaData->ip = new char[strlen(HOSTNAME)+1];
sprintf(kaData->ip, "%s" , HOSTNAME);
(kaData->ip)[strlen(HOSTNAME)] = '\0';
pthread_t* hilos = new pthread_t[1];
pthread_create ( &hilos[0], NULL, keepAliveMethod, (void *)kaData );
char buf[MAXLEN]; // se almacenan los datos TCP recibidos en cada recv
int received_data_size = 1;
{
received_data_size = recvfrom( sock , buf , MAXLEN , 0 , (struct sockaddr *)&from , &length );
if (received_data_size < 1){
if ((received_data_size < 0) && ((errno == EAGAIN) || (errno == EWOULDBLOCK))){
printf("Error, no hay respuesta del servidor.\n");
return;
}else{
printf("Error al recibir datos.\n");
return;
}
}else {
printFrameUDP(buf, received_data_size);
}
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
}
//while (true)
//{
// memset ( frameBuffer , '\0' , 100 );
// if ( recvfrom( sock , frameBuffer , 100 , 0 , (struct sockaddr *)&from , &length ) < 0)
// error("recv from UDP frames");
// printf("%s\n", frameBuffer);
//}
close(sock);
}
void* keepAliveMethod(void* ptr){
keepAliveData* kaData = (keepAliveData*)ptr;
char* buffer = new char[13];
sprintf(buffer, "KEEPALIVE:%d", kaData->keepAliveId);
buffer[13] = '\0';
while (1){
sleep(keepAliveIntervalSeconds);
printf("Sending keep alive request :%d\n", kaData->keepAliveId );
sendDatagramUDPtoHostname(kaData->socketId, kaData->ip, buffer, UDP_PORT);
}
}
int sendDatagramUDPtoHostname(int socket, char* HOSTNAME, char* buffer, unsigned short int destinationPort){
struct sockaddr_in server;
server.sin_family = AF_INET;
server.sin_addr.s_addr = inet_addr(getIP(HOSTNAME));
server.sin_port = htons(destinationPort);
return sendto( socket , buffer , strlen(buffer) , 0, (const struct sockaddr *)&server , sizeof(struct sockaddr_in) );
}
void error(const char *msg)
{
perror(msg);
exit(0);
}
const char* getIP(char* hostname){
struct hostent *hp = gethostbyname(hostname);
if (hp==0)
error("Unknown host");
char* ipAddress = NULL;
struct in_addr **addr_list = (struct in_addr **)hp->h_addr_list;
if(addr_list[0] != NULL){
int tam = strlen(inet_ntoa(*addr_list[0]));
ipAddress = new char[tam+1];
sprintf(ipAddress, "%s", inet_ntoa(*addr_list[0]));
ipAddress[tam] = '\0';
}else{
error("Unknown host");
}
return ipAddress;
}
int main(int argc, char *argv[]) {
if (strcmp(argv[1],"TCP") == 0){
}else if (strcmp(argv[1],"UDP") == 0){
Alvaro Liber Vallve Maidana
committed
printf("ERROR: primer argumento debe ser TCP o UDP.\n");