bsd sockets

[newbieatassembly]

Hi, I am trying to write a simple socket - send and reciive function to port 80.

Here is the code :
// Socket to test http port

// let us have some global variables
#include <stdio.h>
#include <fcntl.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <netdb.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <errno.h>
#include <unistd.h>

#define MAX_BUFFER_SIZE 16*1024

int len, bytes_sent;
char *msg = &quot;GET\n&quot;;
char port[8] = &quot;80&quot;;
struct sockaddr_in server;
struct hostent *h;
struct timeval to;
int socketopen = 1;

int main()
{
int sock_fd, tmp_connect;
fd_set rread, wwrite;
char recv_message[MAX_BUFFER_SIZE];
len = strlen(msg);

sock_fd = socket(AF_INET, SOCK_STREAM, 0);
if(sock_fd < 0) {perror(&quot;socket&quot; return -1;}

// put in required resources
server.sin_family = AF_INET;
h = gethostbyname(&quot;localhost&quot;
if(h == 0) return -1;
memcpy(&(server.sin_addr), h->h_addr, h->h_length);
server.sin_port = htons(atoi(port));

// now connect
tmp_connect = connect(sock_fd, (struct sockaddr *)
&server, sizeof(server));
if(tmp_connect < 0) { perror(&quot;connect&quot;
return -1; }

do {
FD_ZERO(&rread); FD_ZERO(&wwrite);
FD_ISSET(sock_fd, &rread);
FD_ISSET(sock_fd, &wwrite);
memset((char *)&to, 0, sizeof(to));
to.tv_sec = 5;
int sw = select(sock_fd + 1, (fd_set *)0,
&wwrite, (fd_set *)0, &to);
if(sw < 0) { perror(&quot;select&quot; return -1;}
if(sw) {
// data can be written now
send(sock_fd, msg, len, 0);
}

int sr = select(sock_fd + 1, &rread,
(fd_set *)0,(fd_set *)0, &to);
if(sr < 0) { perror(&quot;select read&quot;
return -1; }
if(sr) {
// data can be read now
int rval = read(sock_fd,
recv_message, 16000);
if(rval < 0) { perror(&quot;read&quot;
return -1; }
printf(&quot;\n%s\n&quot;, recv_message);
socketopen = 0;
}
}while(socketopen == 1);

close(sock_fd) ;

return 0;
}

It seems to sending nothing, strace seems to have a sendto(something,something MSB_OOB);

I think something is wrong with the code. I know this code looks like C, so if anyone is offended by this post I am sorry.

 

[newbieatassembly]

Well hmm I got it - it should have been FD_SET and not FD_ISSET.

Thank you