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|
/*
* Copyright (C) 2009-2010 Andreas Steffen
* Hochschule fuer Technik Rapperswil
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#define _GNU_SOURCE
#include <string.h>
#include <library.h>
#include <utils/host.h>
#include "pool_attributes.h"
#include "pool_usage.h"
/**
* global database handle
*/
extern database_t *db;
#define UNITY_NETWORK_LEN 14
ENUM(value_type_names, VALUE_HEX, VALUE_SUBNET,
"hex",
"string",
"addr",
"subnet"
);
typedef struct attr_info_t attr_info_t;
struct attr_info_t {
char* keyword;
value_type_t value_type;
configuration_attribute_type_t type;
configuration_attribute_type_t type_ip6;
};
static const attr_info_t attr_info[] = {
{ "internal_ip4_netmask", VALUE_ADDR, INTERNAL_IP4_NETMASK, 0 },
{ "internal_ip6_netmask", VALUE_ADDR, INTERNAL_IP6_NETMASK, 0 },
{ "netmask", VALUE_ADDR, INTERNAL_IP4_NETMASK,
INTERNAL_IP6_NETMASK },
{ "internal_ip4_dns", VALUE_ADDR, INTERNAL_IP4_DNS, 0 },
{ "internal_ip6_dns", VALUE_ADDR, INTERNAL_IP6_DNS, 0 },
{ "dns", VALUE_ADDR, INTERNAL_IP4_DNS,
INTERNAL_IP6_DNS },
{ "internal_ip4_nbns", VALUE_ADDR, INTERNAL_IP4_NBNS, 0 },
{ "internal_ip6_nbns", VALUE_ADDR, INTERNAL_IP6_NBNS, 0 },
{ "nbns", VALUE_ADDR, INTERNAL_IP4_NBNS,
INTERNAL_IP6_NBNS },
{ "wins", VALUE_ADDR, INTERNAL_IP4_NBNS,
INTERNAL_IP6_NBNS },
{ "internal_ip4_dhcp", VALUE_ADDR, INTERNAL_IP4_DHCP, 0 },
{ "internal_ip6_dhcp", VALUE_ADDR, INTERNAL_IP6_DHCP, 0 },
{ "dhcp", VALUE_ADDR, INTERNAL_IP4_DHCP,
INTERNAL_IP6_DHCP },
{ "internal_ip4_server", VALUE_ADDR, INTERNAL_IP4_SERVER, 0 },
{ "internal_ip6_server", VALUE_ADDR, INTERNAL_IP6_SERVER, 0 },
{ "server", VALUE_ADDR, INTERNAL_IP4_SERVER,
INTERNAL_IP6_SERVER },
{ "application_version", VALUE_STRING, APPLICATION_VERSION, 0 },
{ "version", VALUE_STRING, APPLICATION_VERSION, 0 },
{ "unity_banner", VALUE_STRING, UNITY_BANNER, 0 },
{ "banner", VALUE_STRING, UNITY_BANNER, 0 },
{ "unity_def_domain", VALUE_STRING, UNITY_DEF_DOMAIN, 0 },
{ "unity_splitdns_name", VALUE_STRING, UNITY_SPLITDNS_NAME, 0 },
{ "unity_split_include", VALUE_SUBNET, UNITY_SPLIT_INCLUDE, 0 },
{ "unity_local_lan", VALUE_SUBNET, UNITY_LOCAL_LAN, 0 },
};
/**
* Determine the type of the attribute and its value
*/
static bool parse_attributes(char *name, char *value, value_type_t *value_type,
configuration_attribute_type_t *type,
configuration_attribute_type_t *type_ip6,
chunk_t *blob)
{
host_t *addr = NULL, *mask = NULL;
chunk_t addr_chunk, mask_chunk, blob_next;
char *text = "", *pos_addr, *pos_mask, *pos_next, *endptr;
int i;
switch (*value_type)
{
case VALUE_STRING:
*blob = chunk_create(value, strlen(value));
*blob = chunk_clone(*blob);
break;
case VALUE_HEX:
*blob = chunk_from_hex(chunk_create(value, strlen(value)), NULL);
break;
case VALUE_ADDR:
addr = host_create_from_string(value, 0);
if (addr == NULL)
{
fprintf(stderr, "invalid IP address: '%s'.\n", value);
return FALSE;
}
addr_chunk = addr->get_address(addr);
*blob = chunk_clone(addr_chunk);
break;
case VALUE_SUBNET:
*blob = chunk_empty;
pos_next = value;
do
{
pos_addr = pos_next;
pos_next = strchr(pos_next, ',');
if (pos_next)
{
*pos_next = '\0';
pos_next += 1;
}
pos_mask = strchr(pos_addr, '/');
if (pos_mask == NULL)
{
fprintf(stderr, "invalid IPv4 subnet: '%s'.\n", pos_addr);
free(blob->ptr);
return FALSE;
}
*pos_mask = '\0';
pos_mask += 1;
addr = host_create_from_string(pos_addr, 0);
mask = host_create_from_string(pos_mask, 0);
if (addr == NULL || addr->get_family(addr) != AF_INET ||
mask == NULL || mask->get_family(addr) != AF_INET)
{
fprintf(stderr, "invalid IPv4 subnet: '%s/%s'.\n",
pos_addr, pos_mask);
DESTROY_IF(addr);
DESTROY_IF(mask);
free(blob->ptr);
return FALSE;
}
addr_chunk = addr->get_address(addr);
mask_chunk = mask->get_address(mask);
blob_next = chunk_alloc(blob->len + UNITY_NETWORK_LEN);
memcpy(blob_next.ptr, blob->ptr, blob->len);
pos_addr = blob_next.ptr + blob->len;
memset(pos_addr, 0x00, UNITY_NETWORK_LEN);
memcpy(pos_addr, addr_chunk.ptr, 4);
memcpy(pos_addr + 4, mask_chunk.ptr, 4);
addr->destroy(addr);
mask->destroy(mask);
chunk_free(blob);
*blob = blob_next;
}
while (pos_next);
break;
case VALUE_NONE:
*blob = chunk_empty;
break;
}
/* init the attribute type */
*type = 0;
*type_ip6 = 0;
for (i = 0; i < countof(attr_info); i++)
{
if (strcaseeq(name, attr_info[i].keyword))
{
*type = attr_info[i].type;
*type_ip6 = attr_info[i].type_ip6;
if (*value_type == VALUE_NONE)
{
*value_type = attr_info[i].value_type;
return TRUE;
}
if (*value_type != attr_info[i].value_type &&
*value_type != VALUE_HEX)
{
switch (attr_info[i].value_type)
{
case VALUE_STRING:
text = "a string";
break;
case VALUE_HEX:
text = "a hex";
break;
case VALUE_ADDR:
text = "an IP address";
break;
case VALUE_SUBNET:
text = "a subnet";
break;
case VALUE_NONE:
text = "no";
break;
}
fprintf(stderr, "the %s attribute requires %s value.\n",
name, text);
DESTROY_IF(addr);
free(blob->ptr);
return FALSE;
}
if (*value_type == VALUE_ADDR)
{
*type = (addr->get_family(addr) == AF_INET) ?
attr_info[i].type : attr_info[i].type_ip6;
addr->destroy(addr);
}
else if (*value_type == VALUE_HEX)
{
*value_type = attr_info[i].value_type;
if (*value_type == VALUE_ADDR)
{
if (blob->len == 16)
{
*type = attr_info[i].type_ip6;
}
else if (blob->len != 4)
{
fprintf(stderr, "the %s attribute requires "
"a valid IP address.\n", name);
free(blob->ptr);
return FALSE;
}
}
}
return TRUE;
}
}
/* clean up */
DESTROY_IF(addr);
/* is the attribute type numeric? */
*type = strtol(name, &endptr, 10);
if (*endptr != '\0')
{
fprintf(stderr, "the %s attribute is not recognized.\n", name);
free(blob->ptr);
return FALSE;
}
if (*type < 1 || *type > 32767)
{
fprintf(stderr, "the attribute type must lie in the range 1..32767.\n");
free(blob->ptr);
return FALSE;
}
if (*value_type == VALUE_NONE)
{
*value_type = VALUE_HEX;
}
return TRUE;
}
/**
* Lookup/insert an attribute pool by name
*/
static u_int get_attr_pool(char *name)
{
enumerator_t *e;
u_int row = 0;
/* look for an existing attribute pool in the table */
e = db->query(db, "SELECT id FROM attribute_pools WHERE name = ?",
DB_TEXT, name, DB_UINT);
if (e && e->enumerate(e, &row))
{
e->destroy(e);
return row;
}
DESTROY_IF(e);
/* not found, insert new one */
if (db->execute(db, &row, "INSERT INTO attribute_pools (name) VALUES (?)",
DB_TEXT, name) != 1)
{
fprintf(stderr, "creating attribute pool '%s' failed.\n", name);
return 0;
}
return row;
}
/**
* Lookup/insert an identity
*/
u_int get_identity(identification_t *id)
{
enumerator_t *e;
u_int row;
/* look for peer identity in the identities table */
e = db->query(db, "SELECT id FROM identities WHERE type = ? AND data = ?",
DB_INT, id->get_type(id), DB_BLOB, id->get_encoding(id), DB_UINT);
if (e && e->enumerate(e, &row))
{
e->destroy(e);
return row;
}
DESTROY_IF(e);
/* not found, insert new one */
if (db->execute(db, &row, "INSERT INTO identities (type,data) VALUES (?,?)",
DB_INT, id->get_type(id), DB_BLOB, id->get_encoding(id)) != 1)
{
fprintf(stderr, "creating id '%Y' failed.\n", id);
return 0;
}
return row;
}
/**
* ipsec pool --addattr <type> - add attribute entry
*/
void add_attr(char *name, char *pool, char *identity,
char *value, value_type_t value_type)
{
configuration_attribute_type_t type, type_ip6;
u_int pool_id = 0, identity_id = 0;
char id_pool_str[128] = "";
chunk_t blob;
bool success;
if (pool)
{
pool_id = get_attr_pool(pool);
if (pool_id == 0)
{
exit(EXIT_FAILURE);
}
if (identity)
{
identification_t *id;
id = identification_create_from_string(identity);
identity_id = get_identity(id);
id->destroy(id);
if (identity_id == 0)
{
exit(EXIT_FAILURE);
}
snprintf(id_pool_str, sizeof(id_pool_str),
" for '%s' in pool '%s'", identity, pool);
}
else
{
snprintf(id_pool_str, sizeof(id_pool_str), " in pool '%s'", pool);
}
}
if (value_type == VALUE_NONE)
{
fprintf(stderr, "the value of the %s attribute is missing.\n", name);
usage();
}
if (!parse_attributes(name, value, &value_type, &type, &type_ip6, &blob))
{
exit(EXIT_FAILURE);
}
success = db->execute(db, NULL,
"INSERT INTO attributes (identity, pool, type, value) "
"VALUES (?, ?, ?, ?)", DB_UINT, identity_id, DB_UINT, pool_id,
DB_INT, type, DB_BLOB, blob) == 1;
free(blob.ptr);
if (success)
{
printf("added %s attribute (%N)%s.\n", name,
configuration_attribute_type_names, type, id_pool_str);
}
else
{
fprintf(stderr, "adding %s attribute (%N)%s failed.\n", name,
configuration_attribute_type_names, type, id_pool_str);
}
}
/**
* ipsec pool --delattr <type> - delete attribute entry
*/
void del_attr(char *name, char *pool, char *identity,
char *value, value_type_t value_type)
{
configuration_attribute_type_t type, type_ip6, type_db;
u_int pool_id = 0, identity_id = 0;
char id_pool_str[128] = "";
chunk_t blob, blob_db;
u_int id;
enumerator_t *query;
bool found = FALSE;
if (pool)
{
pool_id = get_attr_pool(pool);
if (pool_id == 0)
{
exit(EXIT_FAILURE);
}
if (identity)
{
identification_t *id;
id = identification_create_from_string(identity);
identity_id = get_identity(id);
id->destroy(id);
if (identity_id == 0)
{
exit(EXIT_FAILURE);
}
snprintf(id_pool_str, sizeof(id_pool_str),
" for '%s' in pool '%s'", identity, pool);
}
else
{
snprintf(id_pool_str, sizeof(id_pool_str), " in pool '%s'", pool);
}
}
if (!parse_attributes(name, value, &value_type, &type, &type_ip6, &blob))
{
exit(EXIT_FAILURE);
}
if (blob.len > 0)
{
query = db->query(db,
"SELECT id, type, value FROM attributes "
"WHERE identity = ? AND pool = ? AND type = ? AND value = ?",
DB_UINT, identity_id, DB_UINT, pool_id, DB_INT, type,
DB_BLOB, blob, DB_UINT, DB_INT, DB_BLOB);
}
else if (type_ip6 == 0)
{
query = db->query(db,
"SELECT id, type, value FROM attributes "
"WHERE identity = ? AND pool = ? AND type = ?",
DB_UINT, identity_id, DB_UINT, pool_id, DB_INT, type,
DB_UINT, DB_INT, DB_BLOB);
}
else
{
query = db->query(db,
"SELECT id, type, value FROM attributes "
"WHERE identity = ? AND pool = ? AND (type = ? OR type = ?)",
DB_UINT, identity_id, DB_UINT, pool_id, DB_INT, type,
DB_INT, type_ip6, DB_UINT, DB_INT, DB_BLOB);
}
if (!query)
{
fprintf(stderr, "deleting '%s' attribute (%N)%s failed.\n",
name, configuration_attribute_type_names, type, id_pool_str);
free(blob.ptr);
exit(EXIT_FAILURE);
}
while (query->enumerate(query, &id, &type_db, &blob_db))
{
host_t *server = NULL;
found = TRUE;
if (value_type == VALUE_ADDR)
{
int family = (type_db == type_ip6) ? AF_INET6 : AF_INET;
server = host_create_from_chunk(family, blob_db, 0);
}
if (db->execute(db, NULL,
"DELETE FROM attributes WHERE id = ?",
DB_UINT, id) != 1)
{
if (server)
{
fprintf(stderr, "deleting %s server %H%s failed\n",
name, server, id_pool_str);
server->destroy(server);
}
else if (value_type == VALUE_STRING)
{
fprintf(stderr, "deleting %s attribute (%N) with value '%.*s'%s failed.\n",
name, configuration_attribute_type_names, type,
(int)blob_db.len, blob_db.ptr, id_pool_str);
}
else
{
fprintf(stderr, "deleting %s attribute (%N) with value %#B%s failed.\n",
name, configuration_attribute_type_names, type,
&blob_db, id_pool_str);
}
query->destroy(query);
free(blob.ptr);
exit(EXIT_FAILURE);
}
if (server)
{
printf("deleted %s server %H%s\n", name, server, id_pool_str);
server->destroy(server);
}
else if (value_type == VALUE_STRING)
{
printf("deleted %s attribute (%N) with value '%.*s'%s.\n",
name, configuration_attribute_type_names, type,
(int)blob_db.len, blob_db.ptr, id_pool_str);
}
else
{
printf("deleted %s attribute (%N) with value %#B%s.\n",
name, configuration_attribute_type_names, type,
&blob_db, id_pool_str);
}
}
query->destroy(query);
if (!found)
{
if (blob.len == 0)
{
if (type_ip6 == 0)
{
fprintf(stderr, "no %s attribute (%N) was found%s.\n", name,
configuration_attribute_type_names, type, id_pool_str);
}
else
{
fprintf(stderr, "no %s attribute%s was found.\n",
name, id_pool_str);
}
}
else
{
if (value_type == VALUE_ADDR)
{
host_t *server = host_create_from_chunk(AF_UNSPEC, blob, 0);
fprintf(stderr, "the %s server %H%s was not found.\n", name,
server, id_pool_str);
server->destroy(server);
}
else
{
fprintf(stderr, "the %s attribute (%N) with value '%.*s'%s "
"was not found.\n", name,
configuration_attribute_type_names, type,
(int)blob.len, blob.ptr, id_pool_str);
}
}
}
free(blob.ptr);
}
/**
* ipsec pool --statusattr - show all attribute entries
*/
void status_attr(bool hexout)
{
configuration_attribute_type_t type;
value_type_t value_type;
chunk_t value, addr_chunk, mask_chunk, identity_chunk;
identification_t *identity;
enumerator_t *enumerator;
host_t *addr, *mask;
char type_name[30];
bool first = TRUE;
int i, identity_type;
char *pool_name;
/* enumerate over all attributes */
enumerator = db->query(db,
"SELECT attributes.type, attribute_pools.name, "
"identities.type, identities.data, attributes.value "
"FROM attributes "
"LEFT OUTER JOIN identities "
"ON attributes.identity = identities.id "
"LEFT OUTER JOIN attribute_pools "
"ON attributes.pool = attribute_pools.id "
"ORDER BY attributes.type, attribute_pools.name, "
"identities.type, identities.data, attributes.value",
DB_INT, DB_TEXT, DB_INT, DB_BLOB, DB_BLOB);
if (enumerator)
{
while (enumerator->enumerate(enumerator, &type,&pool_name,
&identity_type, &identity_chunk, &value))
{
if (first)
{
printf(" type description pool "
" identity value\n");
first = FALSE;
}
snprintf(type_name, sizeof(type_name), "%N",
configuration_attribute_type_names, type);
if (type_name[0] == '(')
{
type_name[0] = '\0';
}
printf("%5d %-20s ",type, type_name);
printf(" %-10s ", (pool_name ? pool_name : ""));
if (identity_type)
{
identity = identification_create_from_encoding(identity_type, identity_chunk);
printf(" %-20.20Y ", identity);
identity->destroy(identity);
}
else
{
printf(" ");
}
value_type = VALUE_HEX;
if (!hexout)
{
for (i = 0; i < countof(attr_info); i++)
{
if (type == attr_info[i].type)
{
value_type = attr_info[i].value_type;
break;
}
}
}
switch (value_type)
{
case VALUE_ADDR:
addr = host_create_from_chunk(AF_UNSPEC, value, 0);
if (addr)
{
printf(" %H\n", addr);
addr->destroy(addr);
}
else
{
/* value cannot be represented as an IP address */
printf(" %#B\n", &value);
}
break;
case VALUE_SUBNET:
if (value.len % UNITY_NETWORK_LEN == 0)
{
for (i = 0; i < value.len / UNITY_NETWORK_LEN; i++)
{
addr_chunk = chunk_create(value.ptr + i*UNITY_NETWORK_LEN, 4);
addr = host_create_from_chunk(AF_INET, addr_chunk, 0);
mask_chunk = chunk_create(addr_chunk.ptr + 4, 4);
mask = host_create_from_chunk(AF_INET, mask_chunk, 0);
printf("%s%H/%H", (i > 0) ? "," : " ", addr, mask);
addr->destroy(addr);
mask->destroy(mask);
}
printf("\n");
}
else
{
/* value cannot be represented as a list of subnets */
printf(" %#B\n", &value);
}
break;
case VALUE_STRING:
printf("\"%.*s\"\n", (int)value.len, value.ptr);
break;
case VALUE_HEX:
default:
printf(" %#B\n", &value);
}
}
enumerator->destroy(enumerator);
}
}
/**
* ipsec pool --showattr - show all supported attribute keywords
*/
void show_attr(void)
{
int i;
for (i = 0; i < countof(attr_info); i++)
{
char value_name[10];
snprintf(value_name, sizeof(value_name), "%N",
value_type_names, attr_info[i].value_type);
printf("%-20s --%-6s (%N",
attr_info[i].keyword, value_name,
configuration_attribute_type_names, attr_info[i].type);
if (attr_info[i].type_ip6)
{
printf(", %N)\n",
configuration_attribute_type_names, attr_info[i].type_ip6);
}
else
{
printf(")\n");
}
}
}
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