usr.sbin/ppp/iplist.c

9  *    notice, this list of conditions and the following disclaimer.
11  *    notice, this list of conditions and the following disclaimer in the
56 iplist_first(struct iplist *list)
58   list->cur.pos = -1;
62 iplist_setrange(struct iplist *list, char *range)
67     if (!inet_aton(range, &list->cur.ip))
69     list->cur.lstart = ntohl(list->cur.ip.s_addr);
70     list->cur.nItems = 1;
72     if (!do_inet_aton(range, ptr, &list->cur.ip))
75       list->cur.lstart = ntohl(list->cur.ip.s_addr);
76       list->cur.nItems = 1;
87       list->cur.lstart = ntohl(list->cur.ip.s_addr);
88       list->cur.nItems = ntohl(endip.s_addr) - list->cur.lstart + 1;
89       if (list->cur.nItems < 1)
93   list->cur.srcitem = 0;
94   list->cur.srcptr = range;
99 iplist_nextrange(struct iplist *list)
103   ptr = list->cur.srcptr;
107     ptr = list->src;
109   while (*ptr != '\0' && !iplist_setrange(list, ptr)) {
121       ptr = list->src;
128 iplist_next(struct iplist *list)
130   if (list->cur.pos == -1) {
131     list->cur.srcptr = NULL;
132     if (!iplist_nextrange(list)) {
133       list->cur.ip.s_addr = INADDR_ANY;
134       return list->cur.ip;
136   } else if (++list->cur.srcitem == list->cur.nItems) {
137     if (!iplist_nextrange(list)) {
138       list->cur.ip.s_addr = INADDR_ANY;
139       list->cur.pos = -1;
140       return list->cur.ip;
143     list->cur.ip.s_addr = htonl(list->cur.lstart + list->cur.srcitem);
144   list->cur.pos++;
146   return list->cur.ip;
150 iplist_setsrc(struct iplist *list, const char *src)
152   strncpy(list->src, src, sizeof list->src - 1);
153   list->src[sizeof list->src - 1] = '\0';
154   list->cur.srcptr = list->src;
156     if (iplist_nextrange(list))
157       list->nItems += list->cur.nItems;
160   } while (list->cur.srcptr != list->src);
165 iplist_reset(struct iplist *list)
167   list->src[0] = '\0';
168   list->nItems = 0;
169   list->cur.pos = -1;
173 iplist_setcurpos(struct iplist *list, long pos)
175   if (pos < 0 || (unsigned)pos >= list->nItems) {
176     list->cur.pos = -1;
177     list->cur.ip.s_addr = INADDR_ANY;
178     return list->cur.ip;
181   list->cur.srcptr = NULL;
182   list->cur.pos = 0;
184     iplist_nextrange(list);
185     if (pos < (int)list->cur.nItems) {
187         list->cur.srcitem = pos;
188         list->cur.pos += pos;
189         list->cur.ip.s_addr = htonl(list->cur.lstart + list->cur.srcitem);
193     pos -= list->cur.nItems;
194     list->cur.pos += list->cur.nItems;
197   return list->cur.ip;
201 iplist_setrandpos(struct iplist *list)
204   return iplist_setcurpos(list, random() % list->nItems);
208 iplist_ip2pos(struct iplist *list, struct in_addr ip)
215   memcpy(&cur, &list->cur, sizeof cur);
217   for (iplist_first(list), f = 0; f < list->nItems; f++)
218     if (iplist_next(list).s_addr == ip.s_addr) {
219       result = list->cur.pos;
223   memcpy(&list->cur, &cur, sizeof list->cur);