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/*
* $Id:$
*/
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <stdlib.h>
#include <string.h>
#include "command.h"
#include "mbuf.h"
#include "log.h"
#include "defs.h"
#include "iplist.h"
static int
do_inet_aton(const char *start, const char *end, struct in_addr *ip)
{
static char ipstr[16];
if (end - start > 15) {
LogPrintf(LogWARN, "%.*s: Invalid IP address\n", end-start, start);
return 0;
}
strncpy(ipstr, start, end-start);
ipstr[end-start] = '\0';
return inet_aton(ipstr, ip);
}
static void
iplist_first(struct iplist *list)
{
list->cur.pos = -1;
}
static int
iplist_setrange(struct iplist *list, char *range)
{
char *ptr, *to;
if ((ptr = strpbrk(range, ",-")) == NULL) {
if (!inet_aton(range, &list->cur.ip))
return 0;
list->cur.lstart = ntohl(list->cur.ip.s_addr);
list->cur.nItems = 1;
} else {
if (!do_inet_aton(range, ptr, &list->cur.ip))
return 0;
if (*ptr == ',') {
list->cur.lstart = ntohl(list->cur.ip.s_addr);
list->cur.nItems = 1;
} else {
struct in_addr endip;
to = ptr+1;
if ((ptr = strpbrk(to, ",-")) == NULL)
ptr = to + strlen(to);
if (*to == '-')
return 0;
if (!do_inet_aton(to, ptr, &endip))
return 0;
list->cur.lstart = ntohl(list->cur.ip.s_addr);
list->cur.nItems = ntohl(endip.s_addr) - list->cur.lstart + 1;
if (list->cur.nItems < 1)
return 0;
}
}
list->cur.srcitem = 0;
list->cur.srcptr = range;
return 1;
}
static int
iplist_nextrange(struct iplist *list)
{
char *ptr, *to, *end;
ptr = list->cur.srcptr;
if (ptr != NULL && (ptr = strchr(ptr, ',')) != NULL)
ptr++;
else
ptr = list->src;
while (*ptr != '\0' && !iplist_setrange(list, ptr)) {
if ((end = strchr(ptr, ',')) == NULL)
end = ptr + strlen(ptr);
if (end == ptr)
return 0;
LogPrintf(LogWARN, "%.*s: Invalid IP range (skipping)\n", end - ptr, ptr);
to = ptr;
do
*to = *end++;
while (*to++ != '\0');
if (*ptr == '\0')
ptr = list->src;
}
return 1;
}
struct in_addr
iplist_next(struct iplist *list)
{
if (list->cur.pos == -1) {
list->cur.srcptr = NULL;
if (!iplist_nextrange(list)) {
list->cur.ip.s_addr = INADDR_ANY;
return list->cur.ip;
}
} else if (++list->cur.srcitem == list->cur.nItems) {
if (!iplist_nextrange(list)) {
list->cur.ip.s_addr = INADDR_ANY;
list->cur.pos = -1;
return list->cur.ip;
}
} else
list->cur.ip.s_addr = htonl(list->cur.lstart + list->cur.srcitem);
list->cur.pos++;
return list->cur.ip;
}
int
iplist_setsrc(struct iplist *list, const char *src)
{
strncpy(list->src, src, sizeof(list->src));
list->src[sizeof(list->src)-1] = '\0';
list->cur.srcptr = list->src;
do {
if (iplist_nextrange(list))
list->nItems += list->cur.nItems;
else
return 0;
} while (list->cur.srcptr != list->src);
return 1;
}
void
iplist_reset(struct iplist *list)
{
list->src[0] = '\0';
list->nItems = 0;
list->cur.pos = -1;
}
struct in_addr
iplist_setcurpos(struct iplist *list, int pos)
{
if (pos < 0 || pos >= list->nItems) {
list->cur.pos = -1;
list->cur.ip.s_addr = INADDR_ANY;
return list->cur.ip;
}
list->cur.srcptr = NULL;
list->cur.pos = 0;
while (1) {
iplist_nextrange(list);
if (pos < list->cur.nItems) {
if (pos) {
list->cur.srcitem = pos;
list->cur.pos += pos;
list->cur.ip.s_addr = htonl(list->cur.lstart + list->cur.srcitem);
}
break;
}
pos -= list->cur.nItems;
list->cur.pos += list->cur.nItems;
}
return list->cur.ip;
}
struct in_addr
iplist_setrandpos(struct iplist *list)
{
randinit();
return iplist_setcurpos(list, random() % list->nItems);
}
int
iplist_ip2pos(struct iplist *list, struct in_addr ip)
{
struct iplist_cur cur;
int f, result;
result = -1;
memcpy(&cur, &list->cur, sizeof(cur));
for (iplist_first(list), f = 0; f < list->nItems; f++)
if (iplist_next(list).s_addr == ip.s_addr) {
result = list->cur.pos;
break;
}
memcpy(&list->cur, &cur, sizeof(list->cur));
return result;
}
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