I have no idea how to work with strings in C:
here's a part of my server: The break never gets called, even though I supply the character '/' through telnet.
Ideally, this would buffer up the string called get by adding the string ch to it over and over again until it reaches a certain character, or, better yet, a string (but write now it is supposed to work with a character but i'd love to know how to do it with a string so I can design a protocol that uses CR+LF as the seperator).
char ch;
int index = 0;
char get[1024];
const char str[] = "/";
if ( read( client, &ch, 1 ) < 0 )
{
perror( "read" );
get[index] = ch;
index++;
int compareResult = strncmp(str, &ch, 5);
if(compareResult == 0){
index = 0;
close( client );
printf( "server responded, connection closed" );
break;
}
}
//if ( write( client, &ch, 1 ) < 0 ) { perror( "write" ); break; }
printf( "got stuff" );
why does it not reach the
printf( "server responded, connection closed" );
line?
full code for server: http://pastebin.com/j5tX3TEx
This:
int compareResult = strncmp(str, &ch, 5);
invokes undefined behavior. You're passing &ch, the address of a single char to a function expecting a string pointer. So, it will look at at most 5 characters starting from the address of &ch, which of course is only one character of data.
Your entire read logic is very strange, it should do larger reads and not one character at a time.