Hi.
The program works fine if i just compile and run.
But for the program to get graded it has to pass a test written in python which it does not.
Since i'm complete dummy at c and programming if you find to explain, dumb it down please...
so here is my code
#include <sys/types.h>
#include <sys/socket.h>
#include <stdio.h>
#include <stdlib.h>
#include <netinet/in.h>
#include <netdb.h>
#include <unistd.h>
#include <string.h>
/* http://docs.sun.com/app/docs/doc/806-1017/6jab5di3g?a=view */
/* http://www.aquaphoenix.com/ref/gnu_c_library */
int main(int argc, char ** argv) {
char *hostname;
int sock, port=80;
struct hostent *hp;
struct sockaddr_in sin;
/* kontrollime kahe argumendi olemasolu */
if ( argc == 2 )hostname = argv[1];
else
{
fprintf(stdout, "Error.\n");
exit(EXIT_FAILURE);
}
/* avame socketi */
sock = socket(AF_INET, SOCK_STREAM, 0);
if (sock == -1)
{
fprintf(stdout, "Error.\n");
exit(EXIT_FAILURE);
}
/* võtame hosti aadress */
//hp = gethostbyname(hostname);
//hp = gethostbyaddr(hostname,sizeof(sin), AF_INET);
if (hp == NULL || (hp ==NULL)
{
fprintf(stdout, "Server IP not found.\n");
close(sock);
exit(EXIT_FAILURE);
}
/* anna serverile aadressi ja pordi kohu minna */
sin.sin_family = hp->h_addrtype;
sin.sin_port = htons(port);
/*kopeerin serverisse, mille külge ühendume */
memcpy((char *)&sin.sin_addr, (char *)hp->h_addr,hp->h_length);
if (connect(sock, (struct sockaddr *)&sin, sizeof(sin)) == -1)
{
fprintf(stdout, "Does not support HTTP.\n");
close(sock);
exit(EXIT_FAILURE);
}
else{
fprintf(stdout,"Supports HTTP.\n");
exit(EXIT_SUCCESS);
}
}Here is the tests.py file that checks it...
#!/usr/bin/env python
# coding: utf-8
import sys, os
verbose = 0
def run_test(f, site, expected, returnval, msg):
"""Fun function for provided tests"""
if verbose:
print
print msg
cmd = "%s %s" % (f, site)
if verbose:
print cmd
print
if bool(os.system(cmd)) != bool(returnval):
if verbose:
sys.stderr.write("Error, wrong return value\n")
else:
print "ERR (Return)"
# compare files
if map(lambda x: x[0] == x[1], zip([expected],os.popen(cmd).readlines()))[0]:
print "OK"
else:
if verbose:
sys.stderr.write("Output is not: %s" % (expected))
else:
print "ERR"
def test_working(f):
run_test(f, "cs.ttu.ee", "Supports HTTTP.\n", 0, "Testing working HTTP.")
def test_nonexistent(f):
run_test(f, "cs.ttu.ee", "Server IP not found.\n", 1, "Testing non-existent server")
def test_nonworking(f):
run_test(f, "cs6.cs.ttu.ee", "Does not support HTTP.\n", 1, "Testing non-working HTTP (may take a while)")
def test_args(f):
run_test(f, "", "Error.\n", 1, "Testing without any arguments.")
if __name__ == "__main__":
progname = "./chkhttp"
if len(sys.argv) > 1:
progname = "/home/%s/CLABOR/alt7/chkhttp" % sys.argv[1]
verbose = 0
if not os.access(progname, os.X_OK):
sys.stderr.write("Error: Cannot run file: %s\n" % (progname))
exit(1)
try:
os.system("less /home/%s/CLABOR/alt7/chkhttp.c" % (sys.argv[1]))
except:
sys.stderr.write("Error: Canot display c-file\n")
test_working(progname)
test_nonworking(progname)
test_args(progname)
test_nonexistent(progname)
exit(0)And if i use hp = gethostbyaddr(hostname,sizeof(sin), AF_INET);
i get this back:
Testing working HTTP.
Server IP not found.
ERR (Return)
ERR
Testing non-working HTTP (may take a while)
Server IP not found.
ERR
Testing without any arguments.
Error.
OK
Testing non-existent server
Server IP not found.
OK
But if i use hp = gethostbyname(hostname);
i get this back:
Testing working HTTP.
Supports HTTP.
ERR
Testing non-working HTTP (may take a while)
Does not support HTTP.
OK
Testing without any arguments.
Error.
OK
Testing non-existent server
Supports HTTP.
ERR (Return)
ERR
Can anyone tell me how to fix my code so that atleast the non-working HTTP and non-existent servers tests pass together. I have tried experiment, but that only lead to more errors.
Server itself is some sort of linux....