int main (int argc, char ** argv)
{
struct addrinfo * res = get_address_info();
int socket_fd = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
bind(sockfd, res->ai_addr, res->ai_addrlen);
return EXIT_SUCCESS;
}
static Bool
get_displayname_auth(char *displayname, Xauth *auth)
{
int family;
char *host = NULL, *rest = NULL;
int dpynum, scrnum;
char *cp;
int len;
Xauth proto;
int prelen = 0;
/*
* check to see if the display name is of the form "host/unix:"
* which is how the list routine prints out local connections
*/
cp = strchr(displayname, '/');
if (cp && strncmp (cp, "/unix:", 6) == 0)
prelen = (cp - displayname);
#ifdef __APPLE__
/*
* FIXME: This is an attempt to get the right
* cookie, because no one can grant that the
* X server is running on the display number
* reported in the launchd display name.
*/
if (strncmp (displayname, "/tmp/launch", 11) == 0)
displayname = strrchr(displayname, ':');
#endif
if (!parse_displayname (displayname + ((prelen > 0) ? prelen + 1 : 0),
&family, &host, &dpynum, &scrnum, &rest)) {
return False;
}
proto.family = family;
proto.address = get_address_info (family, displayname, prelen, host, &len);
if (proto.address) {
char buf[40]; /* want to hold largest display num */
proto.address_length = len;
buf[0] = '\0';
sprintf (buf, "%d", dpynum);
proto.number_length = strlen (buf);
if (proto.number_length <= 0) {
free (proto.address);
proto.address = NULL;
} else {
proto.number = copystring (buf, proto.number_length);
}
}
if (host) free (host);
if (rest) free (rest);
if (proto.address) {
auth->family = proto.family;
auth->address = proto.address;
auth->address_length = proto.address_length;
auth->number = proto.number;
auth->number_length = proto.number_length;
auth->name = NULL;
auth->name_length = 0;
auth->data = NULL;
auth->data_length = 0;
return True;
} else {
return False;
}
}
int main (int argc, const char* argv[]) {
// Check if the user has not given enough parameters
if (argc != 3) {
printf("Invalid command. Usage: \"%s [address] [port]\"\n", argv[0]);
exit(EXIT_FAILURE);
}
// Init structs and other variables
struct addrinfo* results;
int sockfd, nbytes;
char buf[MAXDATASIZE];
// Try to get addrinfo, exiting on error
printf("Getting address information...\n");
results = get_address_info(argv[1], argv[2]);
if (!results) {
fprintf(stderr, "Implement assignment 1!\n");
exit(EXIT_FAILURE);
}
// Get IP addresses
printf("Printing IP addresses for %s...\n", argv[1]);
char* addr = print_addresses(results);
if (!addr) {
fprintf(stderr, "Implement assignment 2!\n");
exit(EXIT_FAILURE);
}
printf("%s", addr);
free(addr);
// Bind and connect socket
printf("Connecting to server...\n");
sockfd = create_and_connect(results);
if (!sockfd) {
fprintf(stderr, "Implement assignment 3!\n");
close(sockfd);
exit(EXIT_FAILURE);
}
// We don't need this struct anymore
freeaddrinfo(results);
// Receive data
printf("Receiving data...\n");
nbytes = receive_data(sockfd, buf);
if (!nbytes) {
fprintf(stderr, "Implement assignment 4!\n");
exit(EXIT_FAILURE);
}
buf[nbytes] = '\0';
printf("Received: %s\n", buf);
// Send data
printf("Sending data...\n");
nbytes = send_data(sockfd, buf);
if (!nbytes) {
fprintf(stderr, "Implement assignment 5!\n");
exit(EXIT_FAILURE);
}
buf[nbytes] = '\0';
printf("Sent: %s\n", buf);
// Receive confirmation
if ((nbytes = recv(sockfd, buf, MAXDATASIZE-1, 0)) == -1) {
perror("recv error");
exit(EXIT_FAILURE);
}
buf[nbytes] = '\0';
printf("Received: %s\n", buf);
// Close the socket after the sending and receiving is done
close(sockfd);
return 0;
}
static Bool
get_displayname_auth(const char *displayname, AuthList **authl)
{
int family;
char *host = NULL, *rest = NULL;
int dpynum, scrnum;
char *cp;
int prelen = 0;
struct addrlist *addrlist_head, *addrlist_cur;
AuthList *authl_cur = NULL;
*authl = NULL;
/*
* check to see if the display name is of the form "host/unix:"
* which is how the list routine prints out local connections
*/
cp = strchr(displayname, '/');
if (cp && strncmp (cp, "/unix:", 6) == 0)
prelen = (cp - displayname);
if (!parse_displayname (displayname + ((prelen > 0) ? prelen + 1 : 0),
&family, &host, &dpynum, &scrnum, &rest)) {
return False;
}
addrlist_head = get_address_info(family, displayname, prelen, host);
if (addrlist_head) {
char buf[40]; /* want to hold largest display num */
unsigned short dpylen;
buf[0] = '\0';
sprintf (buf, "%d", dpynum);
dpylen = strlen (buf);
if (dpylen > 0) {
for (addrlist_cur = addrlist_head; addrlist_cur != NULL;
addrlist_cur = addrlist_cur->next) {
AuthList *newal = malloc(sizeof(AuthList));
Xauth *auth = malloc(sizeof(Xauth));
if ((newal == NULL) || (auth == NULL)) {
if (newal != NULL) free(newal);
if (auth != NULL) free(auth);
break;
}
if (authl_cur == NULL) {
*authl = authl_cur = newal;
} else {
authl_cur->next = newal;
authl_cur = newal;
}
newal->next = NULL;
newal->auth = auth;
auth->family = addrlist_cur->family;
auth->address = addrlist_cur->address;
auth->address_length = addrlist_cur->len;
auth->number = copystring(buf, dpylen);
auth->number_length = dpylen;
auth->name = NULL;
auth->name_length = 0;
auth->data = NULL;
auth->data_length = 0;
}
}
}
if (host) free (host);
if (rest) free (rest);
if (*authl != NULL) {
return True;
} else {
return False;
}
}
