Problemas Cliente-Servidor Socket Tengo un programa en C, que tiene que ser usado como cliente para enviar paquentes a un "servidor" el cual entra por un socket, les envío un codigo que tengo que "reutilizar"!!!!!, espero que me ayuden y me digan que cambiar para poder reutilizarlo.
Necesito ayuda por favor!!!!!!!!!!!!
Código de Cliente:
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <netdb.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <sys/socket.h>
void error(char *msg)
{
perror(msg);
exit(0);
}
int makemess(int id,int nsgt,int v,char *config)
{
int i,l,a;
//char config[2048];
//j=hex(num_hexa[k])*16+hex(num_hexa[k+1]);
config[8]=(char)66;//r)129;//tpgt0x81
i=nsgt/256;
l=nsgt-256*i;
config[9]=(char)i;//sgt
config[10]=(char)l;//nsgt
a=4;
i=a/256;
l=a-256*i;
config[11]=(char)i;//lengt
config[12]=(char)l;//lengt
config[0]=0x7E;// tipo mensaje
config[1]=0x40;// tipo mensaje
i=id/256;
l=id-256*i;
config[2]=(char)i;//primera parte de identificador
config[3]=(char)l;// segunda parte de indentificador
i=nsgt/256;
l=nsgt-256*i;
config[4]=(char)i;//NSEC.
config[5]=(char)l;//NSEC
a=5+a;
i=a/256;
l=a-256*i;
config[6]=(char)i;//lengt
config[7]=(char)l;//lengt
config[13]=(char)v;//lengt
config[14]=(char)nsgt;//lengt
i=nsgt/256;
l=nsgt-256*i;
config[15]=(char)i;//sgt
config[16]=(char)l;//nsgt
return (a);
}
void client(int n,unsigned char *buffer,int portno, char *direcc,int nsgt,int v)
{ int sockfd, n1,i,l,ii,a;
struct sockaddr_in serv_addr;
struct hostent *server;
char config[600];
//char buffer[256];
/* if (argc < 3) {
fprintf(stderr,"usage %s hostname port\n", argv[0]);
exit(0);
}*/
// portno = atoi(argv[2]);
sockfd = socket(AF_INET, SOCK_STREAM, 0);
if (sockfd < 0)
error("ERROR opening socket");
server = gethostbyname(direcc);
if (server == NULL) {
fprintf(stderr,"ERROR, no such host\n");
exit(0);
}
bzero((char *) &serv_addr, sizeof(serv_addr));
serv_addr.sin_family = AF_INET;
bcopy((char *)server->h_addr,
(char *)&serv_addr.sin_addr.s_addr,
server->h_length);
serv_addr.sin_port = htons(portno);
if (connect(sockfd,(struct sockaddr *)&serv_addr,sizeof(serv_addr)) < 0)
error("ERROR connecting");
printf("Please enter the message: ");
bzero(buffer,256);
//while(1)
{
bzero(buffer,256);
n=read(sockfd,buffer,256);
if (n < 0)
error("ERROR reading from socket");
printf("\n");
// a=a;
i=buffer[5];//=(char)i;//lengt
a=buffer[6]+i*256;//=(char)l;//lengt
printf("-a-%i ",a);
for ( i=0;i<13;i++)
{
printf("\n %i=%x =%i",i,buffer[i],buffer[i]);}
printf("\n ---");
//for ( i=13;i<a-13;i++)
a=4;
a=a+7;
printf("\n -%i--",a);
// for ( i=13;i<=a;i++)
// {
//printf("\n%i=%c =%i",i,buffer[i],buffer[i]);
// }
printf("\n %i",buffer[3]);
// fgets(buffer,255,stdin);
a=makemess(buffer[3],nsgt,v,config);
//printf("-a-%i ",a);
for ( i=0;i<17;i++)
{
printf("\n %i=%x =%i",i,config[i],config[i]);}
printf("\n ---");
n = write(sockfd,config,17);
if (n < 0)
error("ERROR writing to socket");
//return 0;
}
}
int main(int argc, char *argv[])
{
int sockfd, portno, n;
struct sockaddr_in serv_addr;
struct hostent *server;
char buffer[256];
if (argc < 5) {
fprintf(stderr,"usage %s hostname port\n", argv[0]);
exit(0);
}
portno = atoi(argv[2]);
//server = gethostbyname(argv[1]);
//while(1)
{client(0,argv[1],portno,argv[1],atoi(argv[3]),atoi(argv[4]));
}
return 0;
}
