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#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <ctype.h>
#include <stdlib.h>
#include <getopt.h>
#include <arpa/inet.h>
#include <linux/netfilter_ipv4/ip_pool.h>
#include <libippool/ip_pool_support.h>
/* translate errnos, as returned by our *sockopt() functions */
static char *errno2msg(int op, int err)
{
switch(err) {
case ERANGE:
return "Address out of pool range";
}
return strerror(err);
}
static void usage(char *msg)
{
if (msg) fprintf(stderr, "ERROR: %s\n", msg);
fprintf(stderr,
"Usage: ippool [-LADCNF] [POOL] [args]\n"
"The POOL argument is either a number, or a name from %s\n"
, IPPOOL_CONF);
fprintf(stderr,
"ippool [-n] [-l|-L POOL] [-u] [-v]\n"
"\tLists all (-l), or a single (-L) pool.\n"
"\tWith -u, summarized usage counts are listed.\n"
"\tWith -v, each pool membership is shown, one per line.\n"
"ippool [-n] [-f|-F [POOL]]\n"
"\tflushes POOL (or all pools.)\n"
"ippool [-n] [-x|-X [POOL]]\n"
"\tremoves POOL (or all pools.)\n"
"ippool [-n] -B\n"
"\tcreates all fully specified pools found in the config file.\n"
"ippool [-n] -N POOL [-t type] [FIRST LAST]\n"
"\tcreates POOL of IP addresses FIRST to LAST (inclusive). If a\n"
"\tpool name from the config file %s is used, type and\n"
"\taddress information can be defined there. The -t argument\n"
"\tgives the type (default bitmap).\n"
"ippool [-n] -A POOL ADDR\n"
"\tadds ADDR to POOL\n"
"ippool [-n] -D POOL ADDR\n"
"\tremoves ADDR from POOL\n"
"ippool [-n] -C POOL ADDR\n"
"\ttests ADDR against membership in POOL\n"
, IPPOOL_CONF);
exit(1);
}
/* config file parsing */
#define IP_POOL_T_NONE 0
#define IP_POOL_T_BITMAP 1
static int conf_type = IP_POOL_T_NONE;
static unsigned long conf_addr = 0;
static unsigned long conf_addr2 = 0;
#define SCAN_EOF (IP_POOL_NONE-1)
static ip_pool_t get_index_line(
FILE *fp,
char **namep,
char **typep,
char **argp
) {
char *p;
ip_pool_t index;
static char buf[256];
if (namep) *namep = 0;
if (typep) *typep = 0;
if (argp) *argp = 0;
if (!fgets(buf, sizeof(buf), fp)) return SCAN_EOF;
p = strtok(buf, " \t\n");
if (!p || *p == '#') return IP_POOL_NONE;
index = atoi(p);
p = strtok(0, " \t\n");
if (!p || *p == '#') return index;
if (namep) *namep = p;
p = strtok(0, " \t\n");
if (!p || *p == '#') return index;
if (typep) *typep = p;
p = strtok(0, "#\n");
if (argp) *argp = p;
return index;
}
static ip_pool_t get_index(char *name)
{
FILE *fp;
char *poolname, *type, *arg, *p;
ip_pool_t res;
if (isdigit(*name))
return atoi(name);
fp = fopen(IPPOOL_CONF, "r");
if (!fp) {
fprintf(stderr, "cannot open %s - no pool names", IPPOOL_CONF);
exit(1);
}
while (SCAN_EOF != (res=get_index_line(fp, &poolname, &type, &arg))) {
if (poolname && 0 == strcmp(poolname, name)) {
if (!type || (0 == strcmp(type, "bitmap"))) {
conf_type = IP_POOL_T_BITMAP;
p = strtok(arg, " \t");
if (p) {
conf_addr = inet_addr(p);
p = strtok(0, " \t");
if (p)
conf_addr2 = inet_addr(p);
else
conf_addr = 0;
}
}
break;
}
}
fclose(fp);
if (res == SCAN_EOF) {
fprintf(stderr, "pool '%s' not found in %s\n",
name, IPPOOL_CONF);
exit(1);
}
return res;
}
static char *get_name(ip_pool_t index)
{
FILE *fp;
static char sbuf[256];
int ok = 0;
fp = fopen(IPPOOL_CONF, "r");
if (fp) {
while (fgets(sbuf, sizeof(sbuf), fp)) {
char *p = strtok(sbuf, " \t\n");
if (!p || *p == '#') continue;
if (index != atoi(p)) continue;
p = strtok(0, " \t\n");
if (!p || *p == '#') continue;
memmove(sbuf, p, strlen(p)+1);
ok = 1;
break;
}
fclose(fp);
}
if (!ok) sprintf(sbuf, "%d", index);
return sbuf;
}
/* user/kernel interaction */
static int fd = -1;
static int flag_n = 0; /* do not do anything; just brag about it */
static int flag_v = 0; /* be verbose (list members) */
static int flag_q = 0; /* be quiet */
static int flag_u = 0; /* show usage counts in listings */
static char *flag_t = "bitmap"; /* pool type */
static ip_pool_t high_nr(void)
{
struct ip_pool_request req;
int reqlen = sizeof(req);
req.op = IP_POOL_HIGH_NR;
if (0 > getsockopt(fd, SOL_IP, SO_IP_POOL, &req, &reqlen)) {
fprintf(stderr,
"IP_POOL_HIGH_NR failed: %s\n",
errno2msg(IP_POOL_HIGH_NR, errno));
exit(1);
}
return req.index;
}
static void do_list(ip_pool_t pool)
{
struct ip_pool_request req;
int reqlen = sizeof(req);
u_int32_t first_ip;
u_int32_t last_ip;
req.op = IP_POOL_LOOKUP;
req.index = pool;
req.addr = req.addr2 = 0;
reqlen = sizeof(req);
if (0 == getsockopt(fd, SOL_IP, SO_IP_POOL, &req, &reqlen)) {
struct in_addr ina;
ina.s_addr = req.addr;
printf("%s %s", get_name(req.index), inet_ntoa(ina));
ina.s_addr = req.addr2;
printf(" %s", inet_ntoa(ina));
first_ip = ntohl(req.addr);
last_ip = ntohl(req.addr2);
if (flag_u) {
req.op = IP_POOL_USAGE;
req.index = pool;
reqlen = sizeof(req);
if (0 == getsockopt(fd, SOL_IP, SO_IP_POOL,
&req, &reqlen)) {
printf(" %d %d", req.addr, req.addr2);
} else {
printf(" - -");
}
}
printf("\n");
if (flag_v) {
while (first_ip <= last_ip) {
req.op = IP_POOL_TEST_ADDR;
req.index = pool;
ina.s_addr = req.addr = htonl(first_ip);
reqlen = sizeof(req);
if (0 == getsockopt(fd, SOL_IP, SO_IP_POOL,
&req, &reqlen)) {
if (req.addr) printf("\t%s\n",
inet_ntoa(ina));
}
first_ip++;
}
}
}
}
static void do_list_all(void)
{
ip_pool_t i, highest = high_nr();
for (i=0; i<=highest; i++)
do_list(i);
}
static void do_flush(ip_pool_t pool)
{
struct ip_pool_request req;
int reqlen = sizeof(req);
req.op = IP_POOL_FLUSH;
req.index = pool;
if (flag_n) {
printf("ippool -F %d\n", req.index);
return;
}
if (0 > getsockopt(fd, SOL_IP, SO_IP_POOL, &req, &reqlen)) {
int err = errno;
fprintf(stderr,
"IP_POOL_FLUSH %s failed: %s\n",
get_name(pool), errno2msg(IP_POOL_FLUSH, err));
exit(1);
}
}
static void do_flush_all(void)
{
ip_pool_t i, highest = high_nr();
for (i=0; i<=highest; i++)
do_flush(i);
}
static void do_destroy(ip_pool_t pool)
{
struct ip_pool_request req;
int reqlen = sizeof(req);
req.op = IP_POOL_DESTROY;
req.index = pool;
if (flag_n) {
printf("ippool -X %d\n", req.index);
return;
}
if (0 > getsockopt(fd, SOL_IP, SO_IP_POOL, &req, &reqlen)) {
int err = errno;
fprintf(stderr,
"IP_POOL_DESTROY %s failed: %s\n",
get_name(pool), errno2msg(IP_POOL_DESTROY, err));
exit(1);
}
}
static void do_destroy_all(void)
{
ip_pool_t i, highest = high_nr();
for (i=0; i<=highest; i++)
do_destroy(i);
}
static int do_adddel(ip_pool_t pool, char *straddr, int op)
{
struct ip_pool_request req;
int res;
int reqlen = sizeof(req);
req.op = op;
req.index = pool;
req.addr = inet_addr(straddr);
req.addr2 = 0;
if (flag_n) {
printf("ippool -%c %s %s\n",
(op == IP_POOL_ADD_ADDR) ? 'A' : 'D',
get_name(req.index), straddr);
return 0;
}
res = getsockopt(fd, SOL_IP, SO_IP_POOL, &req, &reqlen);
if (0 > res) {
int err = errno;
fprintf(stderr,
"IP_POOL_ADD/DEL %s in %s failed: %s\n",
straddr, get_name(pool), errno2msg(op, err));
exit(1);
}
if (!flag_q)
printf("%s %s %d %d\n", get_name(pool), straddr, req.addr,
op == IP_POOL_ADD_ADDR ? 1 : 0);
return req.addr;
}
static int do_check(ip_pool_t pool, char *straddr)
{
struct ip_pool_request req;
int reqlen = sizeof(req);
req.op = IP_POOL_TEST_ADDR;
req.index = pool;
req.addr = inet_addr(straddr);
if (0 > getsockopt(fd, SOL_IP, SO_IP_POOL, &req, &reqlen)) {
int err = errno;
fprintf(stderr,
"IP_POOL_TEST_ADDR %s in %s failed: %s\n",
straddr, get_name(pool),
errno2msg(IP_POOL_TEST_ADDR, err));
exit(1);
}
if (!flag_q)
printf("%s %s %d\n", get_name(req.index), straddr, req.addr);
return !req.addr;
}
static void do_new(ip_pool_t pool, int argc, char **argv)
{
struct ip_pool_request req;
int reqlen = sizeof(req);
req.op = IP_POOL_INIT;
req.index = pool;
if (argc >= 2) {
conf_type = IP_POOL_T_BITMAP;
conf_addr = inet_addr(argv[0]);
conf_addr2 = inet_addr(argv[1]);
}
if (conf_type != IP_POOL_T_BITMAP || conf_addr == 0 || conf_addr2 == 0)
usage("bad pool specification");
req.addr = conf_addr;
req.addr2 = conf_addr2;
if (flag_n) {
printf("ippool -N %s [-T %s] ...\n", get_name(pool),
conf_type == IP_POOL_T_BITMAP
? "bitmap"
: "???");
return;
}
if (0 > getsockopt(fd, SOL_IP, SO_IP_POOL, &req, &reqlen)) {
struct in_addr ina;
int err = errno;
ina.s_addr = conf_addr;
fprintf(stderr,
"IP_POOL_INIT %s [%s-",
get_name(pool), inet_ntoa(ina));
ina.s_addr = conf_addr2;
fprintf(stderr,
"%s] failed: %s\n",
inet_ntoa(ina), errno2msg(IP_POOL_INIT, err));
exit(1);
}
}
static void do_new_all(void)
{
FILE *fp;
char *poolname, *type, *arg, *p;
int res;
fp = fopen(IPPOOL_CONF, "r");
if (!fp) {
fprintf(stderr, "cannot open %s - no pool names", IPPOOL_CONF);
exit(1);
}
while (SCAN_EOF != (res=get_index_line(fp, &poolname, &type, &arg))) {
if (poolname && type && (0 == strcmp(type, "bitmap"))) {
conf_type = IP_POOL_T_BITMAP;
p = strtok(arg, " \t");
if (p) {
conf_addr = inet_addr(p);
p = strtok(0, " \t");
if (p)
conf_addr2 = inet_addr(p);
else
conf_addr = 0;
}
if (conf_addr != 0) {
if (flag_v)
printf("ippool -N %s (%s) [%s]\n",
poolname, type, arg);
do_new(res, 0, 0);
}
}
}
fclose(fp);
}
int main(int argc, char **argv)
{
int opt;
int op;
#define OP_NONE 0
#define OP_LIST 1
#define OP_LIST_ALL 2
#define OP_FLUSH 3
#define OP_FLUSH_ALL 4
#define OP_DESTROY 5
#define OP_DESTROY_ALL 6
#define OP_ADD 7
#define OP_DEL 8
#define OP_CHECK 9
#define OP_NEW 10
#define OP_NEW_ALL 11
#define OP_HIGHEST 12
char *op_pool;
fd = socket(AF_INET, SOCK_DGRAM, 0);
if (fd < 0) {
fprintf(stderr, "cannot get DGRAM socket: %s\n",
strerror(errno));
exit(1);
}
op_pool = 0;
op = OP_NONE;
/* GRRR. I thought getopt() would allow an "L*" specifier, for an -L
* taking an optional argument. Does not work. Bad.
* Adding -l for -L without argument, also -f/-F and -x/-X.
*/
while (EOF != (opt=getopt( argc, argv, "HhnvuqA:D:C:N:t:L:F:X:lfxB")))
switch(opt) {
case 'l':
if (op != OP_NONE) usage("conflicting operations");
op = OP_LIST_ALL;
break;
case 'L':
if (op != OP_NONE) usage("conflicting operations");
op = OP_LIST;
op_pool = optarg;
break;
case 'f':
if (op != OP_NONE) usage("conflicting operations");
op = OP_FLUSH_ALL;
break;
case 'F':
if (op != OP_NONE) usage("conflicting operations");
op = OP_FLUSH;
op_pool = optarg;
break;
case 'x':
if (op != OP_NONE) usage("conflicting operations");
op = OP_DESTROY_ALL;
break;
case 'X':
if (op != OP_NONE) usage("conflicting operations");
op = OP_DESTROY;
op_pool = optarg;
break;
case 'A':
if (op != OP_NONE) usage("conflicting operations");
op = OP_ADD;
op_pool = optarg;
break;
case 'D':
if (op != OP_NONE) usage("conflicting operations");
op = OP_DEL;
op_pool = optarg;
break;
case 'C':
if (op != OP_NONE) usage("conflicting operations");
op = OP_CHECK;
op_pool = optarg;
break;
case 'B':
if (op != OP_NONE) usage("conflicting operations");
op = OP_NEW_ALL;
break;
case 'N':
if (op != OP_NONE) usage("conflicting operations");
op = OP_NEW;
op_pool = optarg;
break;
case 'H':
if (op != OP_NONE) usage("conflicting operations");
op = OP_HIGHEST;
break;
case 't':
flag_t = optarg;
break;
case 'n':
flag_n = 1;
break;
case 'v':
flag_v = 1;
break;
case 'u':
flag_u = 1;
break;
case 'q':
flag_q = 1;
break;
case 'h':
usage(0);
default:
usage("bad option");
}
if (op == OP_NONE)
usage("no operation specified");
if (op == OP_LIST_ALL) {
do_list_all();
return 0;
}
if (op == OP_LIST) {
do_list(get_index(op_pool));
return 0;
}
if (op == OP_FLUSH_ALL) {
do_flush_all();
return 0;
}
if (op == OP_FLUSH) {
do_flush(get_index(op_pool));
return 0;
}
if (op == OP_DESTROY_ALL) {
do_destroy_all();
return 0;
}
if (op == OP_DESTROY) {
do_destroy(get_index(op_pool));
return 0;
}
if (op == OP_CHECK) {
if (optind >= argc)
usage("missing address to check");
return do_check(get_index(op_pool), argv[optind]);
}
if (op == OP_NEW_ALL) {
do_new_all();
return 0;
}
if (op == OP_NEW) {
do_new(get_index(op_pool), argc-optind, argv+optind);
return 0;
}
if (op == OP_ADD) {
if (optind >= argc)
usage("missing address to add");
return do_adddel(get_index(op_pool),
argv[optind], IP_POOL_ADD_ADDR);
}
if (op == OP_DEL) {
if (optind >= argc)
usage("missing address to delete");
return do_adddel(get_index(op_pool),
argv[optind], IP_POOL_DEL_ADDR);
}
if (op == OP_HIGHEST) {
printf("%d\n", high_nr());
return 0;
}
usage("no operation specified");
return 0;
}
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