-#define i_isdigit(x) isdigit((int) (unsigned char) (x))
-
-int is_ipv4_address(const char *host)
-{
- while (*host != '\0') {
- if (*host != '.' && !i_isdigit(*host))
- return 0;
- host++;
- }
- return 1;
-}
-
-static char *get_domain_mask(char *host)
-{
- char *ptr;
-
- if (strchr(host, '.') == NULL) {
- /* no dots - toplevel domain or IPv6 address */
- ptr = strrchr(host, ':');
- if (ptr != NULL) {
- /* IPv6 address, ban the last 64k addresses */
- if (ptr[1] != '\0') strcpy(ptr+1, "*");
- }
- return host;
- }
-
- if (is_ipv4_address(host)) {
- /* it's an IP address, change last digit to * */
- ptr = strrchr(host, '.');
- if (ptr != NULL && i_isdigit(ptr[1]))
- strcpy(ptr+1, "*");
- } else {
- /* if more than one dot, skip the first
- (dyn123.blah.net -> *.blah.net) */
- ptr = strchr(host, '.');
- if (ptr != NULL && strchr(ptr+1, '.') != NULL) {
- host = ptr-1;
- host[0] = '*';
- }
- }
- return host;
-}
-
-char *generate_ban_hostmask(struct userNode *user, const char banopt)
-{
- char *nickname = NULL;
- char *ident = "*";
- char *hostname = NULL;
- char *mask = NULL;
- char *usemask = NULL;
- int len;
-
- usemask = user->hostname;
- if (IsFakeHost(user) && IsHiddenHost(user))
- usemask = user->fakehost;
- else if (IsSetHost(user))
- usemask = strchr(user->sethost, '@') + 1;
- else if (IsHiddenHost(user) && user->handle_info && hidden_host_suffix) {
- usemask = alloca(strlen(user->handle_info->handle) + strlen(hidden_host_suffix) + 2);
- sprintf(usemask, "%s.%s", user->handle_info->handle, hidden_host_suffix);
- }
-
- if((banopt == '6') || (banopt == '7') || (banopt == '8') || (banopt == '9'))
- nickname = user->nick;
- else
- nickname = "*";
-
- if((banopt == '4') || (banopt == '5') || (banopt == '8') || (banopt == '9'))
- hostname = get_domain_mask(usemask);
- else
- hostname = usemask;
-
- if((banopt == '1') || (banopt == '6')) {
- if (IsSetHost(user)) {
- ident = alloca(strcspn(user->sethost, "@")+2);
- safestrncpy(ident, user->sethost, strcspn(user->sethost, "@")+1);
- } else
- ident = user->ident;
- }
- else if((banopt == '2') || (banopt == '4') || (banopt == '8')) {
- if (IsSetHost(user)) {
- ident = alloca(strcspn(user->sethost, "@")+3);
- ident[0] = '*';
- safestrncpy(ident+1, user->sethost, strcspn(user->sethost, "@")+1);
- } else {
- ident = malloc(strlen(user->ident)+1);
- sprintf(ident, "*%s", user->ident);
- }
- } else
- ident = "*";
-
- /* Put it all together. */
- len = strlen(ident) + strlen(hostname) + strlen(nickname) + 3;
- mask = malloc(len);
- sprintf(mask, "%s!%s@%s", nickname, ident, hostname);
-
- return mask;
-}
-