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servent.c
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servent.c
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#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <netinet/ip.h>
#include <errno.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <pthread.h>
#include <sys/time.h>
#include <unistd.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <sys/types.h>
#include <dirent.h>
#include <sys/stat.h>
#define WEBCACHEPORT 80
#define MYPORT 6346
#define MAX_MESSAGE 550
#define MAX_IPS 10
#define MAX_LONG_IP 22
#define MAX_HILOS 10
#define MAX_CONEXIONES 3
#define BLOCK 1024
#define RESP_OK 200
#define RESP_BUSY 503
#define TIMEOUT 30
int G_INTERFAZ = 1;
int G_ESCUCHAR = 1;
int G_RECIBIR = 1;
char* G_ROWEBCACHE = "http://ctel011/0057514/cgi-bin/gcache.cgi";
char* G_SHAREPATH = "share";
char* G_INCOMINGPATH = "incoming";
char* G_DOWNLOADPATH = "download";
char* G_LOCALPATH = ".";
int G_LOCALPORT = 6346;
fd_set master, readfds;
int lista_hilos[MAX_HILOS];
char ** lista_ips;
char ** conexiones;
int get_total_conexiones();
int socket_con[MAX_CONEXIONES];
int lista_sockets[MAX_IPS];
void parsear_ips(char* msj);
int respuesta_handshake(char* msg);
void get_ips_xtry(char* msg, char** xtry);
char* get_ip();
int get_num_conexiones();
int obtener_socket_libre();
int get_archivos(char * criterio);
void * escuchar();
void * handshake();
int re_handshake(char** ips_xtry);
void * interfaz();
void set_menu(char* param, char* valor);
void * recibir(void* socket);
int crear_query(char * criterio, char** output);
int crear_query_hit( char ** output,int number);
int decodificar_query_hit(char *query,int socket);
int short2leb(char *dest, unsigned short v);
unsigned short leb2short(char *orig);
unsigned int leb2int(char *orig);
unsigned int int2leb(char *dest, int v);
int block_sending(int sock,char *path);
int block_recv(int sock, char * path,char * msg);
void mover_a_downloads(char * path);
int sockfd, sockaux, socket_escucha;
struct sockaddr_in my_addr, their_addr, listen_addr, wc_addr;
char ** nombres_compartidos;
char ** index_compartidos;
unsigned int * tamanios_compartidos;
char *archivo_recibir;
char nombres_hit[100][256];
char index_hit[100][256];
char ip_puerto_hit[100][MAX_LONG_IP];
unsigned int tamanios_hit[100];
int numero_query_hit=0;
int socket_hit[100];
int query_hits_recibidas=0;
pthread_t hilo_escucha, hilo_comunica, hilo_interfaz;
pthread_t hilo_conexiones[MAX_HILOS];
struct sockaddr_in lista_sockaddrs[MAX_IPS];
int main() {
FILE *file = fopen("rotella.cfg","r");
char** comandos = (char **)calloc(5, 200);
char* conf = (char*)malloc(1000);
int lec = 0;
char c;
char * delim = "\r\n";
char * result =(char*)malloc(MAX_MESSAGE);
int a = 0;
char* iploc = get_ip();
char* msg2;
char msg[MAX_MESSAGE] = "GET http://ctel011/0057514/cgi-bin/gcache.cgi?ip=";
char msgaux2 [] = " HTTP/1.1\r\nHost: ctel011\r\n\r\n";
char puerto[6];
char* resp1;
char* resp2;
int nbytes;
if(file != NULL){
while(1) { /* keep looping... */
c = fgetc(file);
if(c!=EOF) {
conf[lec++]= c;
printf("%c", c);
/* print the file one character at a time */
}
else {
break; /* ...break when EOF is reached */
}
}
printf("conf: %s\n",conf);
result= strtok(conf,delim);
lec =0;
while(result != NULL){
comandos[lec]= result;
lec++;
result = strtok(NULL, delim);
}
lec=0;
while(comandos[lec] != NULL){
int lec2 =0;
char** comando = (char**)calloc(200, sizeof(char));
char* param = comando[1];
printf("auxLista %d %s\n", lec, comandos[lec]);
result = strtok(comandos[lec], " ");
while(result != NULL){
comando[lec2++]=result;
result = strtok(NULL," ");
}
printf("param %s\n", param);
set_menu(comando[1], comando[2]);
lec++;
}
}
/* Hasta aqui probamos */
for (a = 0; a <= MAX_CONEXIONES; a++){
socket_con[a] = -1;
}
printf("Insert a port\n");
printf("Connecting to WEBCACHE\n");
printf("IPloc = %s \n", iploc);
msg2 = (char*)malloc(MAX_MESSAGE);
memset(msg2, 0, MAX_MESSAGE);
msg2 = strcpy(msg2, "GET ");
strcat(msg2, G_ROWEBCACHE);
strcat(msg2, "?hostfile=1 HTTP/1.1\r\nHost: ctel011\r\n\r\n");
printf("%s\n",msg2);
strcat(msg, iploc);
strcat(msg, ":");
sprintf(puerto, "%d", G_LOCALPORT);
strcat(msg, puerto);
strcat(msg, msgaux2);
lista_ips = (char **)calloc(MAX_IPS,MAX_LONG_IP);
conexiones = (char **)calloc(MAX_CONEXIONES, MAX_LONG_IP);
resp1 = (char *)malloc(MAX_MESSAGE);
memset(resp1, 0, MAX_MESSAGE);
resp2 = (char *)malloc(MAX_MESSAGE);
/* Chequear si devuelve -1! */
if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
perror("socket");
exit(-1);
}
wc_addr.sin_family = AF_INET; /* Ordenación de la máquina */
wc_addr.sin_port = htons(WEBCACHEPORT); /* Ordenación de la red */
wc_addr.sin_addr.s_addr = inet_addr(get_ip());
/* Pone a cero el resto de la estructura */
memset(&(my_addr.sin_zero), '\0', 8);
/* Chequear si devuelve -1! */
if(connect(sockfd, (struct sockaddr *)&wc_addr, sizeof(struct sockaddr_in))<0){
perror("connect");
exit(-1);
}
if((nbytes= send(sockfd, (char *)msg2, strlen(msg2), 0))<0){
perror("send");
exit(-1);
}
if ((nbytes= recv(sockfd, (char *) resp1, MAX_MESSAGE, 0))<0){
perror("recv");
exit(-1);
}
parsear_ips(resp1);
if(send(sockfd, (char *)msg, strlen(msg), 0)<0){
perror("send");
exit(-1);
}
if ((nbytes=recv(sockfd, (char *) resp2, MAX_MESSAGE, 0))<0){
perror("recv");
exit(-1);
}
if (close(sockfd)<0){
perror("close");
exit(-1);
}
printf("Connecting to WEBCACHE\nMaking Handshake \n");
if(pthread_create( &hilo_comunica, NULL, handshake, NULL)!=0)
{
perror("pthread_create");
exit(-1);
}
pthread_join(hilo_comunica,NULL);
if(pthread_create( &hilo_escucha, NULL, escuchar, NULL)!=0)
{
perror("pthread_create");
exit(-1);
}
if(pthread_create(&hilo_interfaz,NULL, interfaz,NULL)!=0)
{
perror("pthread_create");
exit(-1);
}
pthread_join(hilo_interfaz,NULL);
pthread_join(hilo_escucha, NULL);
printf("main: terminated thread\n");
free(resp1);
free(resp2);
printf("bye!\n");
return 1;
}
void set_menu(char* param, char* valor){
if( strcasecmp(param, "rowebcache") == 0){
printf("G_ROWEBCACHE before %s\n",G_ROWEBCACHE);
G_ROWEBCACHE = (char*)malloc(strlen(valor));
strcpy(G_ROWEBCACHE, valor);
printf("G_ROWEBCACHE after %s\n",G_ROWEBCACHE);
}else if(strcasecmp(param, "localport") == 0){
printf("G_LOCALPORT before %d\n", G_LOCALPORT);
G_LOCALPORT = atoi(valor);
printf("G_LOCALPORT after %d\n", G_LOCALPORT);
}else if(strcasecmp(param, "sharepath") == 0){
printf("G_SHAREPATH before %s\n",G_SHAREPATH);
G_SHAREPATH = (char*)malloc(strlen(valor));
strcpy(G_SHAREPATH, valor);
printf("G_SHAREPATH after %s\n",G_SHAREPATH);
}else if(strcasecmp(param, "incomingpath") == 0){
printf("G_INCOMING before %s\n",G_INCOMINGPATH);
G_INCOMINGPATH = (char*)malloc(strlen(valor));
strcpy(G_INCOMINGPATH, valor);
printf("G_INCOMING after %s\n",G_INCOMINGPATH);
}else if(strcasecmp(param, "downloadpath") == 0){
printf("G_DOWNLOADPATH before %s\n",G_DOWNLOADPATH);
G_DOWNLOADPATH = (char*)malloc(strlen(valor));
strcpy(G_DOWNLOADPATH, valor);
printf("G_DOWNLOADPATH after %s\n",G_DOWNLOADPATH);
}
}
int obtener_socket_libre(){
int z = 0;
for (z = 0; z < MAX_CONEXIONES ; z++){
if(socket_con[z] == -1)
{
return z;
}
}
return MAX_CONEXIONES;
}
int get_total_conexiones(){
int z=0,i=0;
for (z = 0; z < MAX_CONEXIONES ; z++){
if(socket_con[z]!=-1 )
i++;
}
return i;
}
void * escuchar(){
int conex_libre = obtener_socket_libre();
char* resprot1 = (char*) malloc(MAX_MESSAGE);
char* resprot2 = (char*) malloc(MAX_MESSAGE);
char* msgrot1 = "ROTELLA/0.1 200 OK\r\nUser-Agent: Rotella Client\r\n\r\n";
char msgbusy[MAX_MESSAGE] = "ROTELLA/0.1 503 BUSY\r\nUser-Agent: Rotella Client\r\nX-Try: ";
int nbytes = 0;
unsigned int sin_size;
unsigned short aux51 ;
fd_set descriptoresLectura;
socket_escucha = -1;
sockaux = -1;
if ((sockaux= socket(AF_INET, SOCK_STREAM, 0)) < 0) {
perror("socket");
exit(-1);
}
listen_addr.sin_family = AF_INET; /* Ordenación de la máquina */
listen_addr.sin_port = htons(G_LOCALPORT);
listen_addr.sin_addr.s_addr = inet_addr(get_ip());
memset(&(listen_addr.sin_zero), '\0', 8);
if ( bind( sockaux, (struct sockaddr *)&listen_addr, sizeof(struct sockaddr_in)) < 0){
perror("bind");
exit(-1);
}
while(G_ESCUCHAR == 1){
struct timeval timeout;
/* Timeout for select */
timeout.tv_sec = TIMEOUT;
if(listen(sockaux, 5)<0){
perror("listen");
exit(-1);
}
sin_size = sizeof(struct sockaddr_in);
FD_ZERO (&descriptoresLectura);
FD_SET (sockaux, &descriptoresLectura);
select (sockaux+1, &descriptoresLectura, NULL, NULL,&timeout);
if (FD_ISSET(sockaux, &descriptoresLectura)){
if ((socket_escucha = accept(sockaux, (struct sockaddr *)&their_addr, &sin_size)) < 0){
perror("accept");
exit(-1);
}else{
}
aux51 = ntohs(their_addr.sin_port);
if ((nbytes=recv(socket_escucha, (char *)resprot1, MAX_MESSAGE, 0))<0){
perror("recv");
exit(-1);
}
/*Comprobamos si estamos completos*/
if(conex_libre < MAX_CONEXIONES){
char ipCon[MAX_LONG_IP]="";
char* ipConAux = inet_ntoa(their_addr.sin_addr);
char aux52[6];
socket_con[conex_libre]= socket_escucha;
printf("connecting to the ip: %s, listener\n",ipConAux);
strcat(ipCon, ipConAux);
strcat(ipCon, ":");
sprintf(aux52, "%d", aux51);
strcat(ipCon, aux52);
conexiones[conex_libre] = ipCon;
if(send(socket_escucha, (char *)msgrot1, strlen(msgrot1), 0)<0){
perror("send");
exit(-1);
}
/*prueba*/
if ((nbytes=recv(socket_escucha, (char *) resprot2, MAX_MESSAGE, 0))<0){
perror("recv");
exit(-1);
}
/*prueba(void *)*/
if(pthread_create(&hilo_conexiones[conex_libre], NULL, recibir, (void *)(intptr_t)socket_con[conex_libre])!=0)
{
perror("pthread_create");
exit(-1);
}
conex_libre = obtener_socket_libre();
}
else{
int x;
for(x =0; x< conex_libre; x++){
strcat(msgbusy, conexiones[x]);
strcat(msgbusy, ",");
}
strcat(msgbusy,"\r\n\r\n");
if(send(socket_escucha, (char *)msgbusy, strlen(msgbusy), 0)<0){
perror("send");
exit(-1);
}
strncpy(msgbusy, "ROTELLA/0.1 503 BUSY\r\nUser-Agent: Rotella Client\r\nX-Try: ", MAX_MESSAGE);
}
}
}
printf("thread listener finished\n");
return 0;
}
int get_num_conexiones(){
int z = 0;
for (z = 0; z < MAX_CONEXIONES ; z++){
if(conexiones[z] == NULL)
{
return z;
}
}
return MAX_CONEXIONES;
}
void * handshake(){
int i = 0;
int j;
int y;
int nbytes=0;
int conectado = 0;
int respHS;
char* msgrot1 = "ROTELLA CONNECT/0.1\r\nUser-Agent: Rotella Client\r\n\r\n";
char* resprot1 = (char*)malloc(MAX_MESSAGE);
char* msgrot2 = "ROTELLA/0.1 200 OK\r\n\r\n";
char * result =NULL;
char ** Ip_puerto;
int conex_libre = 0;
char ipAUX[MAX_LONG_IP];
Ip_puerto = (char **)calloc(2,16);
conex_libre = obtener_socket_libre();
my_addr.sin_family = AF_INET;
my_addr.sin_port = htons(G_LOCALPORT);
my_addr.sin_addr.s_addr = inet_addr(get_ip());
while(lista_ips[i] != NULL && conex_libre < MAX_CONEXIONES){
if ((lista_sockets[i]= socket(AF_INET, SOCK_STREAM, 0)) < 0) {
perror("socket");
exit(-1);
}
/*separamos ip y puerto*/
j=0;
memcpy(ipAUX, lista_ips[i], MAX_LONG_IP);
result= strtok(ipAUX,":");
Ip_puerto[1]="3565";
while(result != NULL){
Ip_puerto[j]= result;
j++;
result = strtok(NULL, ":");
}
if(strlen(Ip_puerto[1])==0)
Ip_puerto[1]="6346";
lista_sockaddrs[i].sin_family = AF_INET; /* Ordenación de la máquina */
lista_sockaddrs[i].sin_port = htons(atoi(Ip_puerto[1])); /* Ordenación de la red */
lista_sockaddrs[i].sin_addr.s_addr = inet_addr(Ip_puerto[0]);
/* Pone a cero el resto de la estructura */
memset(&(lista_sockaddrs[i].sin_zero), '\0', 8);
if((conectado = connect(lista_sockets[i], (struct sockaddr *)&lista_sockaddrs[i], sizeof(struct sockaddr_in)))<0){
conectado=-1;
perror("connect");
}
/* if(conectado<0)
printf("handshake: conexion a %s:%s RECHAZADA%d\n",lista_ips[i],Ip_puerto[1],conectado);*/
if(conectado >= 0){
socket_con[conex_libre] = lista_sockets[i];
conexiones[conex_libre] = lista_ips[i];
printf("handshake: conection a %s ACCEPTED\n",lista_ips[i]);
if((nbytes= send(lista_sockets[i], (char *)msgrot1, strlen(msgrot1), 0))<0){
perror("send");
/*exit(-1);*/
}
if ((nbytes= recv(lista_sockets[i], (char *) resprot1, MAX_MESSAGE, 0))<0){
perror("recv");
/*exit(-1);*/
}
respHS = respuesta_handshake(resprot1);
if(respHS == RESP_OK){
int IAUX=0;
while(conexiones[IAUX] != NULL){
IAUX++;
}
IAUX=0;
while(socket_con[IAUX] > -1){
IAUX++;
}
if(send(lista_sockets[i], (char *)msgrot2, strlen(msgrot2), 0)<0){
perror("send");
}
if(pthread_create( &hilo_conexiones[conex_libre], NULL, recibir, (void *)(intptr_t) socket_con[conex_libre])!=0)
{
perror("pthread_create");
exit(-1);
}
conex_libre = obtener_socket_libre();
}else if(respHS == RESP_BUSY){
char** ips_xtry = (char **)calloc(MAX_CONEXIONES, MAX_LONG_IP);
get_ips_xtry(resprot1, ips_xtry);
for (y = 0; y < MAX_CONEXIONES; y++){
}
if (close(lista_sockets[i])<0){
perror("close");
exit(-1);
}
re_handshake(ips_xtry);
}else{
if (close(lista_sockets[i])<0){
perror("close");
exit(-1);
}
}
}else{
if (close(lista_sockets[i])<0){
perror("close");
exit(-1);
}
}
i++;
}
return 0;
}
int re_handshake(char** ips_xtry){
char* msgrot1 = "ROTELLA CONNECT/0.1\r\nUser-Agent: Rotella Client\r\n\r\n";
char* resprot1 = (char*)malloc(MAX_MESSAGE);
char* msgrot2 = "ROTELLA/0.1 200 OK\r\n\r\n";
char * result =NULL;
char ** Ip_puerto;
int conex_libre = 0;
int i=0;
int conectado = 0;
int j=0;
char ipAUX[MAX_LONG_IP];
int nbytes=0;
int respHS;
Ip_puerto = (char **)calloc(2,16);
while(ips_xtry[i] != NULL){
i++;
}
i=0;
while(ips_xtry[i] != NULL){
if(conex_libre < MAX_CONEXIONES){
if ((lista_sockets[i]= socket(AF_INET, SOCK_STREAM, 0)) < 0) {
perror("socket");
exit(-1);
}
memcpy(ipAUX, ips_xtry[i], MAX_LONG_IP);
result= strtok(ipAUX,":");
Ip_puerto[1]="3565";
while(result != NULL){
Ip_puerto[j]= result;
j++;
result = strtok(NULL, ":");
}
if(strlen(Ip_puerto[1])==0)
Ip_puerto[1]="6346";
lista_sockaddrs[i].sin_family = AF_INET; /* Ordenación de la máquina */
lista_sockaddrs[i].sin_port = htons(atoi(Ip_puerto[1])); /* Ordenación de la red */
lista_sockaddrs[i].sin_addr.s_addr = inet_addr(Ip_puerto[0]);
/* Pone a cero el resto de la estructura */
memset(&(lista_sockaddrs[i].sin_zero), '\0', 8);
if((conectado = connect(lista_sockets[i], (struct sockaddr *)&lista_sockaddrs[i], sizeof(struct sockaddr_in)))<0){
conectado=-1;
perror("connect");
}
if(conectado > -1){
socket_con[conex_libre] = lista_sockets[i];
conexiones[conex_libre] = ips_xtry[i];
if((nbytes= send(lista_sockets[i], (char *)msgrot1, strlen(msgrot1), 0))<0){
perror("send");
/*exit(-1);*/
}
if ((nbytes= recv(lista_sockets[i], (char *) resprot1, MAX_MESSAGE, 0))<0){
perror("recv");
/*exit(-1);*/
}
respHS = respuesta_handshake(resprot1);
if(respHS == RESP_OK){
if(send(lista_sockets[i], (char *)msgrot2, strlen(msgrot2), 0)<0){
perror("send");
}
if(pthread_create( &hilo_conexiones[conex_libre], NULL, recibir, (void *)(intptr_t) socket_con[conex_libre])!=0)
{
perror("pthread_create");
exit(-1);
}
conex_libre = obtener_socket_libre();
}else{
if (close(lista_sockets[i])<0){
perror("close");
exit(-1);
}
}
}else{
if (close(lista_sockets[i])<0){
perror("close");
exit(-1);
}
}
}
i++;
}
return 0;
}
int respuesta_handshake(char* msg){
char resAux[3];
int res;
resAux[0] = msg[12];
resAux[1] = msg[13];
resAux[2] = msg[14];
res = atoi(resAux);
return res;
}
void get_ips_xtry(char* msg, char** xtry){
char** auxLista = (char **)calloc(MAX_CONEXIONES, MAX_LONG_IP);
char* pch = strstr(msg, "X-Try:");
char * result = strtok(pch, ",");
int i =0;
int j =0;
pch = pch+7;
while(result != NULL && strlen(result)>6){
auxLista[i++] = result;
result = strtok(NULL, ",");
}
for(j = 0; j < i; j++){
xtry[j] = auxLista[j];
}
printf("get_ips_xtry: %s\n", pch);
}
void parsear_ips(char* msj){
char ** auxListaIp;
int i=0;
int j=0;
char* pch = strstr(msj, "\r\n\r\n");
char * delim = "\r\n";
char * result =NULL;
auxListaIp = (char **)calloc(MAX_IPS,MAX_LONG_IP);
result= strtok(pch,delim);
while(result != NULL){
auxListaIp[j]= result;
j++;
result = strtok(NULL, delim);
}
for(i=0;i<MAX_IPS;i++){
if(auxListaIp[i+1] != NULL)
{
if(auxListaIp[i+1][0] != ('0') )
lista_ips[i] = auxListaIp[i+1];
}
}
free(auxListaIp);
}
void * interfaz(){
while(G_INTERFAZ == 1){
char* comando;
char * palabra;
int identificador=0,longitud=0;
int i = 0;
char * query;
char * request;
comando = (char *) malloc(256);
palabra =(char *) malloc(256);
printf("interface: insert a command\n");
scanf("%s",comando);
if (strcmp(comando,"find")==0)
{
query_hits_recibidas=0;
printf("Looking file\n");
numero_query_hit=0;
scanf("%s",palabra);
longitud=crear_query(palabra, &query);
for(i=0; i< MAX_CONEXIONES; i++){
if(socket_con[i]>-1){
if(send(socket_con[i], (char *)query, longitud, 0)<0){
perror("send");
}
}
}
}
if (strcmp(comando,"get")==0)
{
request =(char*)malloc(MAX_MESSAGE);
scanf("%d",&identificador);
identificador--;
strcat(request,"GET ");
strcat(request,(char *)nombres_hit+identificador*256);
strcat(request, "HTTP/1.1\r\nUser-Agent: ROtella\r\nHost: ");
strcat(request,(char *)ip_puerto_hit+ MAX_LONG_IP*identificador);
strcat(request,"\r\n Connection: close\r\n\r\n");
if(send(socket_hit[identificador], (char *)request, strlen(request), 0)<0){
perror("send");
}
archivo_recibir=(char*)malloc(256);
strcpy(archivo_recibir,(char *)nombres_hit+identificador*256);
}
if (strcmp(comando,"stop")==0)
{
scanf("%d",&identificador);
}
if (strcmp(comando,"exit")==0){
int conex_libre = obtener_socket_libre();
G_ESCUCHAR = 0;
G_RECIBIR = 0;
G_INTERFAZ = 0;
printf("Closing the program, wait a moment\n");
for(i = 0; i < conex_libre; i++){
if (close(socket_con[i])<0)
{
perror("close");
}
}
if (close(sockaux)<0)
{
perror("close");
}
break;
}
if (strcasecmp(comando,"set") == 0){
char* p = (char*)malloc(20);
char* v = (char*)malloc(200);
scanf("%s", p);
scanf("%s", v);
printf("p: %s v: %s\n",p, v);
set_menu(p,v);
}
}
/*liberamos las variables locales*/
free(lista_ips);
free(conexiones);
free(nombres_compartidos);
free(index_compartidos);
free(tamanios_compartidos);
printf("thread UI finished\n");
return 0;
}
int crear_query_hit( char**output,int numberOfhits)
{
/*0 Number of Hits.
1-2 Port
3-6 IP Address
7-10 Speed The speed (in kb/second) of the responding host.
11- Result Set.
Bytes: Description:
0-3 File Size.
4- File Index.
x- File Name.
Last 16 Servent Identifier.
*/ int i=0,j=0,k=0;
int longitudPayload=0,longitud_query;
char puerto[2];
char * ip=get_ip();
char payload[4];
char * query;
unsigned long aux_ip;
unsigned long * ptr;
unsigned char * puntero;
sprintf(puerto,"%d",G_LOCALPORT);
for(i=0;i<numberOfhits;i++)
{
char auxIndex[3]="";
longitudPayload+=strlen((char*)nombres_compartidos+256*i); /*le sumamos lo que ocupa cada nombre de archivo*/
longitudPayload+=strlen((char *)index_compartidos+256*i)-1;/*le sumamos lo que ocupan los index*/
sprintf((char *)auxIndex,"%d",i+1);
longitudPayload+=strlen(auxIndex);
}
longitudPayload = longitudPayload + (numberOfhits * 6); /*le sumamos bytes adicionales de cada archivo*/
longitudPayload = longitudPayload +11; /*le sumamos la cabecera de query hits*/
longitud_query= longitudPayload + 23;
/*char query[longitud_query];*/
query = (char *)malloc(longitud_query);
for(i=0;i<4;i++)
payload[i]=0x00;
for(i=0;i<16;i++)
{
*(query+i)=0x00;
}
*(query+16)=(char)0x81;
*(query+17)=0x00;
*(query+18)=0x00;
*(query+22)=(char)payload[0];
*(query+21)=(char)payload[1];
*(query+20)=(char)payload[2];
*(query+19)=(char)payload[3];
*(query+23)=(char) numberOfhits;
/*insertamos el puerto*/
short2leb(puerto,G_LOCALPORT);
for(i=0;i<2;i++)
*(query+i+24)=puerto[i];
/*insertamos la ip*/
aux_ip = inet_addr(ip);
ptr = &aux_ip;
puntero =(unsigned char*) ptr;
for(i=0;i<4;i++)
{
*(query+i+26)=(unsigned char) *puntero;
puntero++;
}
for(i=0;i<4;i++)
*(query+i+30)=0x00;
j=34;
for(i=0;i<numberOfhits;i++)
{
char tamanio[4];
char * puntero1;
int len;
for(k=0;k<4;k++)
tamanio[k]=0x00;
int2leb(tamanio,(unsigned int)*(tamanios_compartidos+i));
*(query+j+3)=tamanio[0];
*(query+j+2)=tamanio[1];
*(query+j+1)=tamanio[2];
*(query+j)=tamanio[3];
j +=4;
puntero1 =(char*) index_compartidos+256*i;
len = strlen((char*)index_compartidos+256*i);
k=0;
while(*(puntero1+k)!=0)
{
*(query+j+len-k-1)=(char)*(puntero1+k);
k++;
}
j+=len;
*(query+j)=0x00;
j+=1;
puntero1=NULL;
len=strlen((char *)nombres_compartidos+i*256);
puntero1=(char *) nombres_compartidos+i*256;
for(k=0;k<len;k++)
{
*(query+j+k)=(char)*(puntero1+k);
}
*(query+j+k)=0x00;
j+=strlen((char *)nombres_compartidos+i*256)+1;
}
(*output) = (char *)malloc(longitud_query);
memcpy(*output, query,longitud_query);
return longitud_query;
}
int decodificar_query_hit(char * msg,int sock){
int numero_hits=(int)msg[23];
char ip[MAX_LONG_IP]="";
int i=0,k=0,j=0;
/*char tamanios[numero_hits][4];
char nombres [numero_hits][256];
char index [numero_hits][256];*/
char ** tamanios;
char **nombres;
char ** index;
char aux_puerto[2];
unsigned short puerto;
char puerto_string[10];
char * puntero;
tamanios=(char**)calloc(numero_hits,4);
nombres=(char **)calloc(numero_hits,256);
index=(char **)calloc(numero_hits,256);
aux_puerto[0]=msg[24];
aux_puerto[1]=msg[25];
puerto = leb2short(aux_puerto);
for(i=0;i<4;i++)
{
int aux=msg[26+i];
char numero[3]="";
if(aux<0) aux+=256;
sprintf(numero,"%d",aux);
strcat((char*)ip,numero);
if(i<3) strcat(ip,".");
}
strcat(ip,":");
sprintf(puerto_string,"%d",puerto);
strcat(ip,puerto_string);
k=34;
i=0;
while(i<numero_hits)
{
int len=0;
puntero=(char *)tamanios +i*4;
for(j=0;j<4;j++)
{
*(puntero+j)=(char)msg[k+3-j];
}
k+=4;
j=0;
len =strlen((char*)msg+k);
strcpy((char*)index + 256*i,(char*)msg+k);
k+=len+1;
len = strlen((char*)msg+k);
strcpy((char*)nombres + 256*i,(char*)msg+k);
k+=len +1;
i++;
}
for(i=0;i<numero_hits;i++)
{
strcpy((char*) index_hit + 256*numero_query_hit,(char*)index + 256*i);
strcpy((char*) nombres_hit + 256*numero_query_hit,(char*)nombres + 256*i);
tamanios_hit[numero_query_hit]= leb2int((char *)tamanios + 4*i);
strcpy((char*) ip_puerto_hit+ MAX_LONG_IP*numero_query_hit,ip);
socket_hit[numero_query_hit]= sock;
numero_query_hit++;
}
return numero_hits;
}
int crear_query(char * criterio, char**output)
{
/*
Bytes: Description:
0-15 Message ID/GUID (Globally Unique ID)
16 Payload Type
17 TTL (Time To Live)
18 Hops
19-22 Payload Length
0-1 Minimum Speed.
2- Search Criteria. This field is terminated by a NUL (0x00).
*/
int longitud=0;
int longitud_query=0;
char payload[4];
int i=0;
char * query;
for(i=0;i<4;i++)
payload[i]=0x00;
longitud= 4 + strlen(criterio);
sprintf((char *)payload,"%d",longitud);
longitud_query= 22+longitud;
query=(char*)malloc(longitud_query);
for(i=0;i<16;i++)
{
*(query +i) =(char)0x00;
}
*(query +16)=(char)0x80;
*(query +17)=0x00;
sprintf((char *)payload,"%d",longitud);
*(query +18)=0x00;
*(query +22)=(char)payload[0];
*(query +21)=(char)payload[1];
*(query +20)=(char)payload[2];