Socket Programming in C

[EDN Admin]

m trying to write a web server but with the code I have Im getting open failed. The html document (ht.html) which is supposed to be opened in the browser.
#include <sys/types.h>
#include <sys/fcntl.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>

#define SERVER_PORT 12345
#define BUF_SIZE 4096
#define QUEUE_SIZE 10


int main(int argc, char *argv[])
{
int s, b, l, fd, sa, bytes, on = 1;
char buf[BUF_SIZE]; //buffer for outgoing file
struct hostent *h; //info about server
struct sockaddr_in channel; //holds IP address

//Build address structure to bind to socket
memset(&channel, 0, sizeof(channel)); //zero channel
channel.sin_family = AF_INET;
channel.sin_addr.s_addr = htonl(INADDR_ANY);
channel.sin_port = htons(SERVER_PORT);


//Passive open. Wait for connection
s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); /* create socket */
if (s < 0) fatal("socket failed");
setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (char *) &on, sizeof(on));


b = bind(s, (struct sockaddr *) &channel, sizeof(channel));
if (b < 0) fatal("bind failed");

l = listen(s, QUEUE_SIZE); /* specify queue size */
if (l < 0) fatal("listen failed");


/* Socket is now set up and bound. Wait for connection and process it. */
while(1) {
sa = accept(s, 0, 0); /* block for connection request */
if (sa < 0) fatal("accept failed");

read(sa, buf, BUF_SIZE); /* read file name from socket */

/* Get and return the file. */

fd = open(buf, O_RDONLY); /* open the file to be sent back */
if (fd < 0) fatal("open failed");

while(1){
bytes = read(fd, buf, BUF_SIZE); /* read from file */
if (bytes <= 0) break; /* check for end of file */
write(sa, buf, bytes); /*write bytes to socket*/
}

close(fd); //close file
close(sa); //close connection

}
}

fatal(char*string)
{
printf("%s", string);
exit(1);
}

What has to be added or wheres my error?



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