include <iostream.h>
#include <sys/socket.h>
#include <netdb.h>
#include <sys/types.h>
#include <unistd.h>
void usage(char *argv);
int main(int argc, char *argv[]) {
/* GETOPT
- Variable: char * optarg
- This variable is set by getopt to point at the value of the option argument, for those options that accept arguments.
- Function: int getopt (int argc, char **argv, const char *options)
- The options argument is a string that specifies the option characters that are valid for this program. An option character in this string can be followed by a colon (`:') to indicate that it takes a required argument. If an option character is followed by two colons (`::'), its argument is optional; this is a GNU extension.
*/
char *ircServerName = NULL;
char *ircNickName = NULL;
char *ircPortNumber = NULL;
char *ircChannelName = NULL;
/* get all the parameters */
int startingCommandLineOptions;
while((startingCommandLineOptions = getopt(argc, argv, "n:c:s:p:")) != EOF) {
switch(startingCommandLineOptions) {
case 'n':
ircNickName = strdup(optarg);
break;
case 'p':
ircPortNumber = strdup(optarg);
break;
case 's':
ircServerName = strdup(optarg);
break;
case 'c':
ircChannelName = strdup(optarg);
/*if(*ircChannelName != '#' && *ircChannelName != '&') {
printf("\nError: The channel name should start with a #\n");
exit(1);
}*/
break;
default:
usage(argv[0]);
break;
}
}
/* check if we filled all the required arguments */
if(!ircServerName) {
printf("Error: You need to specify a server.\n");
exit(1);
}
if(!ircNickName) {
printf("Error: You need to specify a nickname.\n");
exit(1);
}
if(!ircPortNumber) {
printf("Error: You need to specify a port number.\n");
exit(1);
}
if(!ircChannelName) {
printf("Error: You need to specify a channel name.\n");
exit(1);
}
/* INFORMATION ABOUT GETADDRINFO() FUNCTION
- The getaddrinfo() function is defined for protocol-independent nodename-to-
by 
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