int main(int argc, char *argv[])
{
struct rtnl_link *link;
struct nl_sock *sk;
int err;
sk = nl_socket_alloc();
if ((err = nl_connect(sk, NETLINK_ROUTE)) < 0) {
nl_perror(err, "Unable to connect socket");
return err;
}
link = rtnl_link_alloc();
rtnl_link_set_name(link, "my_bond");
if ((err = rtnl_link_delete(sk, link)) < 0) {
nl_perror(err, "Unable to delete link");
return err;
}
rtnl_link_put(link);
nl_close(sk);
return 0;
}
static bool nl80211_init()
{
int err;
sock = nl_socket_alloc();
if (!sock) {
fprintf(stderr, "failed to allocate netlink socket\n");
goto out;
}
err = genl_connect(sock);
if (err) {
nl_perror(err, "failed to make generic netlink connection");
goto out;
}
err = genl_ctrl_alloc_cache(sock, &cache);
if (err) {
nl_perror(err, "failed to allocate netlink controller cache");
goto out;
}
family = genl_ctrl_search_by_name(cache, NL80211_GENL_NAME);
if (!family) {
fprintf(stderr, "failed to find nl80211\n");
goto out;
}
return true;
out:
genl_family_put(family);
nl_cache_free(cache);
nl_socket_free(sock);
return false;
}
int main(int argc, char *argv[])
{
struct nl_cache_mngr *mngr;
struct nl_sock *sock;
struct nl_cache *ct;
sock = nlt_socket_alloc();
mngr = nl_cache_mngr_alloc(sock, NETLINK_NETFILTER, NL_AUTO_PROVIDE);
if (!mngr) {
nl_perror("nl_cache_mngr_alloc");
return -1;
}
ct = nl_cache_mngr_add(mngr, "netfilter/ct", &change_cb);
if (ct == NULL) {
nl_perror("nl_cache_mngr_add(netfilter/ct)");
return -1;
}
for (;;) {
int err = nl_cache_mngr_poll(mngr, 5000);
if (err < 0) {
nl_perror("nl_cache_mngr_poll()");
return -1;
}
}
nl_cache_mngr_free(mngr);
return 0;
}
int main(int argc, char *argv[])
{
struct nl_cache *link_cache;
struct rtnl_link *link, *link2;
struct nl_sock *sk;
uint32_t tb_id;
int err;
sk = nl_socket_alloc();
if ((err = nl_connect(sk, NETLINK_ROUTE)) < 0) {
nl_perror(err, "Unable to connect socket");
return err;
}
if (!(link = rtnl_link_vrf_alloc())) {
fprintf(stderr, "Unable to allocate link");
return -1;
}
rtnl_link_set_name(link, "vrf-red");
if ((err = rtnl_link_vrf_set_tableid(link, 10)) < 0) {
nl_perror(err, "Unable to set VRF table id");
return err;
}
if ((err = rtnl_link_add(sk, link, NLM_F_CREATE)) < 0) {
nl_perror(err, "Unable to add link");
return err;
}
if ((err = rtnl_link_alloc_cache(sk, AF_UNSPEC, &link_cache)) < 0) {
nl_perror(err, "Unable to allocate cache");
return err;
}
if (!(link2 = rtnl_link_get_by_name(link_cache, "vrf-red"))) {
fprintf(stderr, "Unable to lookup vrf-red");
return -1;
}
if ((err = rtnl_link_vrf_get_tableid(link2, &tb_id)) < 0) {
nl_perror(err, "Unable to get VRF table id");
return err;
}
if (tb_id != 10) {
fprintf(stderr, "Mismatch with VRF table id\n");
}
rtnl_link_put(link);
nl_close(sk);
return 0;
}
int main(int argc, char *argv[])
{
struct rtnl_link *link;
struct nl_cache *link_cache;
struct nl_sock *sk;
int err;
sk = nl_socket_alloc();
if ((err = nl_connect(sk, NETLINK_ROUTE)) < 0) {
nl_perror(err, "Unable to connect socket");
return err;
}
if ((err = rtnl_link_alloc_cache(sk, AF_UNSPEC, &link_cache)) < 0) {
nl_perror(err, "Unable to allocate cache");
return err;
}
if ((err = create_bridge(sk, link_cache, TEST_BRIDGE_NAME)) < 0) {
nl_perror(err, "Unable to allocate testbridge");
return err;
}
nl_cache_refill(sk, link_cache);
link = rtnl_link_get_by_name(link_cache, TEST_BRIDGE_NAME);
struct rtnl_link *ltap = rtnl_link_get_by_name(link_cache, TEST_INTERFACE_NAME);
if (!ltap) {
fprintf(stderr, "You should create a tap interface before lunch this test (# tunctl -t %s)\n", TEST_INTERFACE_NAME);
return -1;
}
if ((err = rtnl_link_enslave(sk, link, ltap)) < 0) {
nl_perror(err, "Unable to enslave interface to his bridge\n");
return err;
}
if(rtnl_link_is_bridge(link) == 0) {
fprintf(stderr, "Link is not a bridge\n");
return -2;
}
if(rtnl_link_get_master(ltap) <= 0) {
fprintf(stderr, "Interface is not attached to a bridge\n");
return -3;
}
rtnl_link_put(ltap);
rtnl_link_put(link);
nl_cache_free(link_cache);
nl_socket_free(sk);
return 0;
}
int main(int argc, char *argv[])
{
struct nl_cache *link_cache;
struct rtnl_link *link;
struct in_addr addr;
struct nl_sock *sk;
int err, if_index;
sk = nl_socket_alloc();
if ((err = nl_connect(sk, NETLINK_ROUTE)) < 0) {
nl_perror(err, "Unable to connect socket");
return err;
}
err = rtnl_link_alloc_cache(sk, AF_UNSPEC, &link_cache);
if ( err < 0) {
nl_perror(err, "Unable to allocate cache");
return err;
}
if_index = rtnl_link_name2i(link_cache, "eno16777736");
if (!if_index) {
fprintf(stderr, "Unable to lookup eno16777736");
return -1;
}
link = rtnl_link_sit_alloc();
if(!link) {
nl_perror(err, "Unable to allocate link");
return -1;
}
rtnl_link_set_name(link, "sit-tun");
rtnl_link_sit_set_link(link, if_index);
inet_pton(AF_INET, "192.168.254.12", &addr.s_addr);
rtnl_link_sit_set_local(link, addr.s_addr);
inet_pton(AF_INET, "192.168.254.13", &addr.s_addr);
rtnl_link_sit_set_remote(link, addr.s_addr);
rtnl_link_sit_set_ttl(link, 64);
err = rtnl_link_add(sk, link, NLM_F_CREATE);
if (err < 0) {
nl_perror(err, "Unable to add link");
return err;
}
rtnl_link_put(link);
nl_close(sk);
return 0;
}
int main(int argc, char *argv[])
{
struct nl_cache *link_cache;
struct rtnl_link *link;
struct in6_addr addr;
struct nl_sock *sk;
int err, if_index;
sk = nl_socket_alloc();
if ((err = nl_connect(sk, NETLINK_ROUTE)) < 0) {
nl_perror(err, "Unable to connect socket");
return err;
}
err = rtnl_link_alloc_cache(sk, AF_UNSPEC, &link_cache);
if ( err < 0) {
nl_perror(err, "Unable to allocate cache");
return err;
}
if_index = rtnl_link_name2i(link_cache, "ens33");
if (!if_index) {
fprintf(stderr, "Unable to lookup ens33");
return -1;
}
link = rtnl_link_ip6_tnl_alloc();
if(!link) {
nl_perror(err, "Unable to allocate link");
return -1;
}
rtnl_link_set_name(link, "ip6tnl-tun");
rtnl_link_ip6_tnl_set_link(link, if_index);
inet_pton(AF_INET6, "2607:f0d0:1002:51::4", &addr);
rtnl_link_ip6_tnl_set_local(link, &addr);
inet_pton(AF_INET6, "2607:f0d0:1002:52::5", &addr);
rtnl_link_ip6_tnl_set_remote(link, &addr);
err = rtnl_link_add(sk, link, NLM_F_CREATE);
if (err < 0) {
nl_perror(err, "Unable to add link");
return err;
}
rtnl_link_put(link);
nl_close(sk);
return 0;
}
int main(int argc, char *argv[])
{
struct nl_sock *h[1025];
int i;
h[0] = nl_handle_alloc();
printf("Created handle with port 0x%x\n",
nl_socket_get_local_port(h[0]));
nl_handle_destroy(h[0]);
h[0] = nl_handle_alloc();
printf("Created handle with port 0x%x\n",
nl_socket_get_local_port(h[0]));
nl_handle_destroy(h[0]);
for (i = 0; i < 1025; i++) {
h[i] = nl_handle_alloc();
if (h[i] == NULL)
nl_perror("Unable to allocate socket");
else
printf("Created handle with port 0x%x\n",
nl_socket_get_local_port(h[i]));
}
return 0;
}
static int get_devices_handler(struct nl_msg *n, void *arg)
{
struct nlmsghdr *nlh = nlmsg_hdr(n);
struct nlattr *attrs[NFC_ATTR_MAX + 1];
char *name;
uint32_t idx, protocols;
bool powered;
DBG("");
genlmsg_parse(nlh, 0, attrs, NFC_ATTR_MAX, NULL);
if (!attrs[NFC_ATTR_DEVICE_INDEX] ||
!attrs[NFC_ATTR_DEVICE_NAME] ||
!attrs[NFC_ATTR_PROTOCOLS]) {
nl_perror(NLE_MISSING_ATTR, "NFC_CMD_GET_DEVICE");
return NL_STOP;
}
idx = nla_get_u32(attrs[NFC_ATTR_DEVICE_INDEX]);
name = nla_get_string(attrs[NFC_ATTR_DEVICE_NAME]);
protocols = nla_get_u32(attrs[NFC_ATTR_PROTOCOLS]);
if (!attrs[NFC_ATTR_DEVICE_POWERED])
powered = false;
else
powered = nla_get_u8(attrs[NFC_ATTR_DEVICE_POWERED]);
__near_manager_adapter_add(idx, name, protocols, powered);
return NL_SKIP;
}
int main(int argc, char *argv[])
{
struct rtnl_link *link;
struct nl_cache *link_cache;
struct nl_sock *sk;
struct nl_addr* addr;
int err, master_index;
sk = nl_socket_alloc();
if ((err = nl_connect(sk, NETLINK_ROUTE)) < 0) {
nl_perror(err, "Unable to connect socket");
return err;
}
if ((err = rtnl_link_alloc_cache(sk, AF_UNSPEC, &link_cache)) < 0) {
nl_perror(err, "Unable to allocate cache");
return err;
}
if (!(master_index = rtnl_link_name2i(link_cache, "eth0"))) {
fprintf(stderr, "Unable to lookup eth0");
return -1;
}
link = rtnl_link_macvtap_alloc();
rtnl_link_set_link(link, master_index);
addr = nl_addr_build(AF_LLC, ether_aton("00:11:22:33:44:55"), ETH_ALEN);
rtnl_link_set_addr(link, addr);
nl_addr_put(addr);
rtnl_link_macvtap_set_mode(link, rtnl_link_macvtap_str2mode("bridge"));
if ((err = rtnl_link_add(sk, link, NLM_F_CREATE)) < 0) {
nl_perror(err, "Unable to add link");
return err;
}
rtnl_link_put(link);
nl_close(sk);
return 0;
}
int main(int argc, char *argv[])
{
struct rtnl_link *link;
struct nl_cache *link_cache;
struct nl_sock *sk;
int err, master_index;
sk = nl_socket_alloc();
if ((err = nl_connect(sk, NETLINK_ROUTE)) < 0) {
nl_perror(err, "Unable to connect socket");
return err;
}
if ((err = rtnl_link_alloc_cache(sk, AF_UNSPEC, &link_cache)) < 0) {
nl_perror(err, "Unable to allocate cache");
return err;
}
if (!(master_index = rtnl_link_name2i(link_cache, "eth0"))) {
fprintf(stderr, "Unable to lookup eth0");
return -1;
}
if (!(link = rtnl_link_ipvlan_alloc())) {
fprintf(stderr, "Unable to allocate link");
return -1;
}
rtnl_link_set_link(link, master_index);
rtnl_link_ipvlan_set_mode(link, rtnl_link_ipvlan_str2mode("l2"));
if ((err = rtnl_link_add(sk, link, NLM_F_CREATE)) < 0) {
nl_perror(err, "Unable to add link");
return err;
}
rtnl_link_put(link);
nl_close(sk);
return 0;
}
int main(int argc, char **argv)
{
int c;
int i;
int family;
int group;
struct nl_sock *nl;
struct nl_msg *msg;
char *dummy = NULL;
/* Currently processed command info */
struct iz_cmd cmd;
/* Parse options */
while (1) {
#ifdef HAVE_GETOPT_LONG
int opt_idx = -1;
c = getopt_long(argc, argv, "d::vh", iz_long_opts, &opt_idx);
#else
c = getopt(argc, argv, "d::vh");
#endif
if (c == -1)
break;
switch(c) {
case 'd':
if (optarg) {
i = strtol(optarg, &dummy, 10);
if (*dummy == '\0')
iz_debug = nl_debug = i;
else {
fprintf(stderr, "Error: incorrect debug level: '%s'\n", optarg);
exit(1);
}
} else
iz_debug = nl_debug = 1;
break;
case 'v':
printf( "iz " VERSION "\n"
"Copyright (C) 2008, 2009 by Siemens AG\n"
"License GPLv2 GNU GPL version 2 <http://gnu.org/licenses/gpl.html>.\n"
"This is free software: you are free to change and redistribute it.\n"
"There is NO WARRANTY, to the extent permitted by law.\n"
"\n"
"Written by Dmitry Eremin-Solenikov, Sergey Lapin and Maxim Osipov\n");
return 0;
case 'h':
iz_help(argv[0]);
return 0;
default:
iz_help(argv[0]);
return 1;
}
}
if (optind >= argc) {
iz_help(argv[0]);
return 1;
}
memset(&cmd, 0, sizeof(cmd));
cmd.argc = argc - optind;
cmd.argv = argv + optind;
/* Parse command */
cmd.desc = get_cmd(argv[optind]);
if (!cmd.desc) {
printf("Unknown command %s!\n", argv[optind]);
return 1;
}
if (cmd.desc->parse) {
i = cmd.desc->parse(&cmd);
if (i == IZ_STOP_OK) {
return 0;
} else if (i == IZ_STOP_ERR) {
printf("Command line parsing error!\n");
return 1;
}
}
/* Prepare NL command */
nl = nl_socket_alloc();
if (!nl) {
nl_perror(NLE_NOMEM, "Could not allocate NL handle");
return 1;
}
genl_connect(nl);
family = genl_ctrl_resolve(nl, IEEE802154_NL_NAME);
group = nl_get_multicast_id(nl,
IEEE802154_NL_NAME, IEEE802154_MCAST_COORD_NAME);
if (group < 0) {
fprintf(stderr, "Could not get multicast group ID: %s\n", strerror(-group));
return 1;
}
nl_socket_add_membership(nl, group);
iz_seq = nl_socket_use_seq(nl) + 1;
nl_socket_modify_cb(nl, NL_CB_VALID, NL_CB_CUSTOM,
iz_cb_valid, (void*)&cmd);
nl_socket_modify_cb(nl, NL_CB_FINISH, NL_CB_CUSTOM,
iz_cb_finish, (void*)&cmd);
nl_socket_modify_cb(nl, NL_CB_SEQ_CHECK, NL_CB_CUSTOM,
iz_cb_seq_check, (void*)&cmd);
/* Send request, if necessary */
if (cmd.desc->request) {
msg = nlmsg_alloc();
if (!msg) {
nl_perror(NLE_NOMEM, "Could not allocate NL message!\n"); /* FIXME: err */
return 1;
}
genlmsg_put(msg, NL_AUTO_PID, NL_AUTO_SEQ, family, 0,
cmd.flags, cmd.desc->nl_cmd, 1);
if (cmd.desc->request(&cmd, msg) != IZ_CONT_OK) {
printf("Request processing error!\n");
return 1;
}
dprintf(1, "nl_send_auto_complete\n");
nl_send_auto_complete(nl, msg);
cmd.seq = nlmsg_hdr(msg)->nlmsg_seq;
dprintf(1, "nlmsg_free\n");
nlmsg_free(msg);
}
/* Received message handling loop */
while (iz_exit == IZ_CONT_OK) {
int err = nl_recvmsgs_default(nl);
if (err != NLE_SUCCESS) {
nl_perror(err, "Receive failed");
return 1;
}
}
nl_close(nl);
if (iz_exit == IZ_STOP_ERR)
return 1;
return 0;
}
int main(int argc, char *argv[])
{
struct stat sb; // To check if config file exist.
struct in_addr iaddrf, iaddrl; // To validate IP addresses
struct in6_addr i6addrf; // also
cfg_t *cfg, *cfg_ipv4, *cfg_ipv6;
const char *sect_name;
char *addr_first, *addr_last;
unsigned char addr_maskbits;
int port_first, port_last;
char which[sizeof("ABC")];
struct config_struct cs;
struct nl_sock *nls;
int ret;
if (argc != 2)
{
printf("Usage: %s <config-file>\n", argv[0]);
exit(EXIT_FAILURE);
}
if ( stat(argv[1], &sb) == -1 )
{
printf("Error: Can not open configuration file: %s\n", argv[1]);
exit(EXIT_FAILURE);
}
cfg_opt_t ipv4_opts[] =
{
CFG_STR("ipv4_addr_net", IPV4_DEF_NET, CFGF_NONE),
CFG_INT("ipv4_addr_net_mask_bits", IPV4_DEF_MASKBITS, CFGF_NONE),
CFG_STR("ipv4_pool_range_first", IPV4_DEF_POOL_FIRST, CFGF_NONE),
CFG_STR("ipv4_pool_range_last", IPV4_DEF_POOL_LAST, CFGF_NONE),
CFG_INT("ipv4_tcp_port_range_first", IPV4_DEF_TCP_POOL_FIRST, CFGF_NONE),
CFG_INT("ipv4_tcp_port_range_last", IPV4_DEF_TCP_POOL_LAST, CFGF_NONE),
CFG_INT("ipv4_udp_port_range_first", IPV4_DEF_UDP_POOL_FIRST, CFGF_NONE),
CFG_INT("ipv4_udp_port_range_last", IPV4_DEF_UDP_POOL_LAST, CFGF_NONE),
CFG_END()
};
cfg_opt_t ipv6_opts[] =
{
CFG_STR("ipv6_net_prefix", IPV6_DEF_PREFIX, CFGF_NONE),
CFG_INT("ipv6_net_mask_bits", IPV6_DEF_MASKBITS, CFGF_NONE),
CFG_INT("ipv6_tcp_port_range_first", IPV6_DEF_TCP_POOL_FIRST, CFGF_NONE),
CFG_INT("ipv6_tcp_port_range_last", IPV6_DEF_TCP_POOL_LAST, CFGF_NONE),
CFG_INT("ipv6_udp_port_range_first", IPV6_DEF_UDP_POOL_FIRST, CFGF_NONE),
CFG_INT("ipv6_udp_port_range_last", IPV6_DEF_UDP_POOL_LAST, CFGF_NONE),
CFG_END()
};
cfg_opt_t opts[] =
{
CFG_SEC("ipv4", ipv4_opts, CFGF_NONE),
CFG_SEC("ipv6", ipv6_opts, CFGF_NONE),
CFG_END()
};
cfg = cfg_init(opts, CFGF_NONE);
if(cfg_parse(cfg, argv[1]) == CFG_PARSE_ERROR)
{
printf("Error parsing configuration file: %s\n", argv[1]);
exit_error_conf(cfg);
}
/* Loading IPv4 configuration */
{
cfg_ipv4 = cfg_getsec(cfg, "ipv4");
sect_name = cfg_name(cfg_ipv4);
printf ("Section: %s\n", sect_name);
addr_first = cfg_getstr(cfg_ipv4, "ipv4_addr_net");
if ( inet_aton(addr_first, &iaddrf) == 0 ) // Validate ipv4 addr
{
printf("Error: Invalid IPv4 address net: %s\n", addr_first);
exit_error_conf(cfg);
}
addr_maskbits = cfg_getint(cfg_ipv4, "ipv4_addr_net_mask_bits");
if (addr_maskbits > 32 || addr_maskbits < 0)
{
printf("Error: Bad IPv4 network mask bits value: %d\n", addr_maskbits);
exit_error_conf(cfg);
}
cs.ipv4_addr_net = iaddrf;
cs.ipv4_addr_net_mask_bits = addr_maskbits;
printf("\tPool Network: %s/%d\n", addr_first, addr_maskbits);
//
addr_first = cfg_getstr(cfg_ipv4, "ipv4_pool_range_first");
addr_last = cfg_getstr(cfg_ipv4, "ipv4_pool_range_last");
if ( inet_aton(addr_first, &iaddrf) == 0 ) // Validate ipv4 addr
{
printf("Error: Malformed ipv4_pool_range_first: %s\n", addr_first);
exit_error_conf(cfg);
}
if ( inet_aton(addr_last, &iaddrl) == 0 ) // Validate ipv4 addr
{
printf("Error: Malformed ipv4_pool_range_last: %s\n", addr_last);
exit_error_conf(cfg);
}
if (iaddrf.s_addr > iaddrl.s_addr) // Validate that: first < last
{
printf("Error: First pool address is greater than last pool address.\n");
exit_error_conf(cfg);
}
cs.ipv4_pool_range_first = iaddrf;
cs.ipv4_pool_range_last = iaddrl;
printf("\t\t- First address: %s\n", inet_ntoa(iaddrf));
printf("\t\t- Last address: %s\n", inet_ntoa(iaddrl));
//
port_first = cfg_getint(cfg_ipv4, "ipv4_tcp_port_range_first");
port_last = cfg_getint(cfg_ipv4, "ipv4_tcp_port_range_last");
sprintf(which, "TCP");
if (port_first < 0 || port_first > 65535)
{
printf("Error: Invalid first %s port: %d\n", which, port_first);
exit_error_conf(cfg);
}
if (port_last < 0 || port_last > 65535)
{
printf("Error: Invalid last %s port: %d\n", which, port_last);
exit_error_conf(cfg);
}
if (port_first > port_last)
{
printf("Error: First %s port is greater than last port.\n", which);
exit_error_conf(cfg);
}
cs.ipv4_tcp_port_first = port_first;
cs.ipv4_tcp_port_last = port_last;
printf("\t%s pool port range: %d-%d\n", which, port_first, port_last);
//
port_first = cfg_getint(cfg_ipv4, "ipv4_udp_port_range_first");
port_last = cfg_getint(cfg_ipv4, "ipv4_udp_port_range_last");
sprintf(which, "UDP");
if (port_first < 0 || port_first > 65535)
{
printf("Error: Invalid first %s port: %d\n", which, port_first);
exit_error_conf(cfg);
}
if (port_last < 0 || port_last > 65535)
{
printf("Error: Invalid last %s port: %d\n", which, port_last);
exit_error_conf(cfg);
}
if (port_first > port_last)
{
printf("Error: First %s port is greater than last port.\n", which);
exit_error_conf(cfg);
}
cs.ipv4_udp_port_first = port_first;
cs.ipv4_udp_port_last = port_last;
printf("\t%s pool port range: %d-%d\n", which, port_first, port_last);
printf ("\n" );
}
/* Loading IPv6 configuration */
{
cfg_ipv6 = cfg_getsec(cfg, "ipv6");
sect_name = cfg_name(cfg_ipv6);
printf ("Section: %s\n", sect_name );
addr_first = cfg_getstr(cfg_ipv6, "ipv6_net_prefix");
if ( inet_pton(AF_INET6, addr_first, &i6addrf) < 1 ) // Validate ipv6 addr
{
printf("Error: Invalid IPv6 address net: %s\n", addr_first);
exit_error_conf(cfg);
}
addr_maskbits = cfg_getint(cfg_ipv6, "ipv6_net_mask_bits");
if (addr_maskbits > 128 || addr_maskbits < 0)
{
printf("Error: Bad IPv6 network mask bits value: %d\n", addr_maskbits);
exit_error_conf(cfg);
}
cs.ipv6_net_prefix = i6addrf;
cs.ipv6_net_mask_bits = addr_maskbits;
printf("\tPrefix: %s/%d\n", addr_first, addr_maskbits);
//
port_first = cfg_getint(cfg_ipv6, "ipv6_tcp_port_range_first");
port_last = cfg_getint(cfg_ipv6, "ipv6_tcp_port_range_last");
sprintf(which, "TCP");
if (port_first < 0 || port_first > 65535)
{
printf("Error: Invalid first %s port: %d\n", which, port_first);
exit_error_conf(cfg);
}
if (port_last < 0 || port_last > 65535)
{
printf("Error: Invalid last %s port: %d\n", which, port_last);
exit_error_conf(cfg);
}
if (port_first > port_last)
{
printf("Error: First %s port is greater than last port.\n", which);
exit_error_conf(cfg);
}
cs.ipv6_tcp_port_range_first = port_first;
cs.ipv6_tcp_port_range_last = port_last;
printf("\t%s pool port range: %d-%d\n", which, port_first, port_last);
//
port_first = cfg_getint(cfg_ipv6, "ipv6_udp_port_range_first");
port_last = cfg_getint(cfg_ipv6, "ipv6_udp_port_range_last");
sprintf(which, "UDP");
if (port_first < 0 || port_first > 65535)
{
printf("Error: Invalid first %s port: %d\n", which, port_first);
exit_error_conf(cfg);
}
if (port_last < 0 || port_last > 65535)
{
printf("Error: Invalid last %s port: %d\n", which, port_last);
exit_error_conf(cfg);
}
if (port_first > port_last)
{
printf("Error: First %s port is greater than last port.\n", which);
exit_error_conf(cfg);
}
cs.ipv6_udp_port_range_first = port_first;
cs.ipv6_udp_port_range_last = port_last;
printf("\t%s pool port range: %d-%d\n", which, port_first, port_last);
printf ("\n" );
}
cfg_free(cfg);
/* We got the configuration structure, now send it to the module
* using netlink sockets. */
// Reserve memory for netlink socket
nls = nl_socket_alloc();
if (!nls) {
printf("bad nl_socket_alloc\n");
return EXIT_FAILURE;
}
// Bind and connect the socket to a protocol
ret = nl_connect(nls, NETLINK_USERSOCK);
if (ret < 0) {
nl_perror(ret, "nl_connect");
nl_socket_free(nls);
return EXIT_FAILURE;
}
ret = nl_send_simple(nls, MY_MSG_TYPE, 0, &(cs), sizeof(cs));
if (ret < 0) {
nl_perror(ret, "nl_send_simple");
printf("Error sending message, is module loaded?\n");
nl_close(nls);
nl_socket_free(nls);
return EXIT_FAILURE;
} else {
printf("Message sent (%d bytes):\n", ret);
//print_nat64_run_conf(nrc);
}
nl_close(nls);
nl_socket_free(nls);
exit(EXIT_SUCCESS);
}
static inline void __nl_perror(int error, const char *s)
{
nl_perror(s);
}
/**
* Main function of the user app that parses configuration file and sends it to
* NAT64 kernel module.
*
* @param argc Qty of arguments in command line call.
* @param argv Array of arguments in command line call.
*/
int main(int argc, char *argv[])
{
struct stat sb; // To check if config file exist.
struct in_addr iaddrn, iaddrf, iaddrl; // To validate IP addresses
struct in6_addr i6addrf; // also
cfg_t *cfg, *cfg_ipv4, *cfg_ipv6;
const char *sect_name;
char *addr_first, *addr_last;
unsigned char addr_maskbits;
int port_first, port_last;
char which[sizeof("ABC")];
char str[INET_ADDRSTRLEN];
struct config_struct cs;
struct nl_sock *nls;
int ret;
int i = 0;
struct ipv6_prefixes **ipv6_pref = NULL;
unsigned char ipv6_pref_qty;
char ipv6_def_prefix64[sizeof("1111:2222:3333:4444:5555:6666::/128")];
char *ipv6_buf;
char *ipv6_check_addr;
char *ipv6_check_maskbits;
if (argc != 2)
{
printf("Usage: %s <config-file>\n", argv[0]);
exit(EXIT_FAILURE);
}
if ( stat(argv[1], &sb) == -1 )
{
printf("Error: Can not open configuration file: %s\n", argv[1]);
exit(EXIT_FAILURE);
}
// Load default configuration values for each config option, just in case
// they were not included in the config file.
cfg_opt_t ipv4_opts[] =
{
CFG_STR("ipv4_addr_net", IPV4_DEF_NET, CFGF_NONE),
CFG_INT("ipv4_addr_net_mask_bits", IPV4_DEF_MASKBITS, CFGF_NONE),
CFG_STR("ipv4_pool_range_first", IPV4_DEF_POOL_FIRST, CFGF_NONE),
CFG_STR("ipv4_pool_range_last", IPV4_DEF_POOL_LAST, CFGF_NONE),
CFG_INT("ipv4_tcp_port_range_first", IPV4_DEF_TCP_PORTS_FIRST, CFGF_NONE),
CFG_INT("ipv4_tcp_port_range_last", IPV4_DEF_TCP_PORTS_LAST, CFGF_NONE),
CFG_INT("ipv4_udp_port_range_first", IPV4_DEF_UDP_PORTS_FIRST, CFGF_NONE),
CFG_INT("ipv4_udp_port_range_last", IPV4_DEF_UDP_PORTS_LAST, CFGF_NONE),
CFG_END()
};
// Load default configuration values for each config option, just in case
// they were not included in the config file.
sprintf(ipv6_def_prefix64, "%s/%d", IPV6_DEF_PREFIX, IPV6_DEF_MASKBITS );
cfg_opt_t ipv6_opts[] =
{
CFG_STR_LIST("ipv6_net_prefixes", ipv6_def_prefix64, CFGF_NONE),
CFG_INT("ipv6_tcp_port_range_first", IPV6_DEF_TCP_PORTS_FIRST, CFGF_NONE),
CFG_INT("ipv6_tcp_port_range_last", IPV6_DEF_TCP_PORTS_LAST, CFGF_NONE),
CFG_INT("ipv6_udp_port_range_first", IPV6_DEF_UDP_PORTS_FIRST, CFGF_NONE),
CFG_INT("ipv6_udp_port_range_last", IPV6_DEF_UDP_PORTS_LAST, CFGF_NONE),
CFG_END()
};
// Define two sections in config file
cfg_opt_t opts[] =
{
CFG_SEC("ipv4", ipv4_opts, CFGF_NONE),
CFG_SEC("ipv6", ipv6_opts, CFGF_NONE),
CFG_END()
};
// Parse config file
cfg = cfg_init(opts, CFGF_NONE);
if(cfg_parse(cfg, argv[1]) == CFG_PARSE_ERROR)
{
printf("Error parsing configuration file: %s\n", argv[1]);
exit_error_conf(cfg);
}
/*
* Loading IPv4 configuration
*
*/
{
cfg_ipv4 = cfg_getsec(cfg, "ipv4");
sect_name = cfg_name(cfg_ipv4);
printf ("Section: %s\n", sect_name);
// Validate IPv4 pool address
addr_first = cfg_getstr(cfg_ipv4, "ipv4_addr_net");
if ( convert_ipv4_addr(addr_first, &iaddrn) == EXIT_FAILURE )
{
printf("Error: Invalid IPv4 address net: %s\n", addr_first);
exit_error_conf(cfg);
}
// Validate netmask bits
addr_maskbits = cfg_getint(cfg_ipv4, "ipv4_addr_net_mask_bits");
if ( validate_ipv4_netmask_bits(addr_maskbits) == EXIT_FAILURE )
{
printf("Error: Bad IPv4 network mask bits value: %d\n", addr_maskbits);
exit_error_conf(cfg);
}
// Store values in config struct
cs.ipv4_addr_net = iaddrn;
cs.ipv4_addr_net_mask_bits = addr_maskbits;
printf("\tPool Network: %s/%d\n", addr_first, addr_maskbits);
// Validate pool addresses range
addr_first = cfg_getstr(cfg_ipv4, "ipv4_pool_range_first");
addr_last = cfg_getstr(cfg_ipv4, "ipv4_pool_range_last");
if ( convert_ipv4_addr(addr_first, &iaddrf) == EXIT_FAILURE ) // Validate ipv4 addr
{
printf("Error: Malformed ipv4_pool_range_first: %s\n", addr_first);
exit_error_conf(cfg);
}
if ( convert_ipv4_addr(addr_last, &iaddrl) == EXIT_FAILURE ) // Validate ipv4 addr
{
printf("Error: Malformed ipv4_pool_range_last: %s\n", addr_last);
exit_error_conf(cfg);
}
if ( validate_ipv4_pool_range(&iaddrn, addr_maskbits, &iaddrf, &iaddrl) == EXIT_FAILURE ) // Validate that: first < last
{
printf("Error: Pool addresses badly defined.\n");
exit_error_conf(cfg);
}
// Store values in config struct
cs.ipv4_pool_range_first = iaddrf;
cs.ipv4_pool_range_last = iaddrl;
inet_ntop(AF_INET, &(iaddrf.s_addr), str, INET_ADDRSTRLEN);
printf("\t\t- First address: %s\n", str);
inet_ntop(AF_INET, &(iaddrl.s_addr), str, INET_ADDRSTRLEN);
printf("\t\t- Last address: %s\n", str);
// Validate port ranges
port_first = cfg_getint(cfg_ipv4, "ipv4_tcp_port_range_first");
port_last = cfg_getint(cfg_ipv4, "ipv4_tcp_port_range_last");
sprintf(which, "TCP");
if ( validate_ports_range(port_first, port_last) == EXIT_FAILURE )
{
//~ printf("Error: Invalid first %s port: %d\n", which, port_first);
printf("Error: Invalid %s ports range.\n", which);
exit_error_conf(cfg);
}
cs.ipv4_tcp_port_first = port_first;
cs.ipv4_tcp_port_last = port_last;
printf("\t%s pool port range: %d-%d\n", which, port_first, port_last);
//
port_first = cfg_getint(cfg_ipv4, "ipv4_udp_port_range_first");
port_last = cfg_getint(cfg_ipv4, "ipv4_udp_port_range_last");
sprintf(which, "UDP");
if ( validate_ports_range(port_first, port_last) == EXIT_FAILURE )
{
printf("Error: Invalid %s ports range.\n", which);
exit_error_conf(cfg);
}
cs.ipv4_udp_port_first = port_first;
cs.ipv4_udp_port_last = port_last;
printf("\t%s pool port range: %d-%d\n", which, port_first, port_last);
printf ("\n" );
}
/*
* Loading IPv6 configuration
*
*/
{
cfg_ipv6 = cfg_getsec(cfg, "ipv6");
sect_name = cfg_name(cfg_ipv6);
printf ("Section: %s\n", sect_name );
// Get number of IPv6 prefixes.
ipv6_pref_qty = cfg_size(cfg_ipv6, "ipv6_net_prefixes");
// Allocate memory for the array of prefixes.
ipv6_pref = (struct ipv6_prefixes **) malloc(ipv6_pref_qty * sizeof(struct ipv6_prefixes *));
for(i = 0; i < ipv6_pref_qty; i++)
{
// Split prefix and netmask bits
ipv6_buf = cfg_getnstr(cfg_ipv6, "ipv6_net_prefixes", i);
ipv6_check_addr = strtok(ipv6_buf, "/");
ipv6_check_maskbits = strtok(NULL, "/");
// Validate IPv6 addr
if ( convert_ipv6_addr(ipv6_check_addr, &i6addrf) == EXIT_FAILURE )
{
printf("Error: Invalid IPv6 address net: %s\n", ipv6_check_addr);
exit_error_conf(cfg);
}
// Validate netmask bits
addr_maskbits = atoi(ipv6_check_maskbits);
if ( validate_ipv6_netmask_bits(addr_maskbits) == EXIT_FAILURE )
{
printf("Error: Bad IPv6 network mask bits value: %d\n", addr_maskbits);
exit_error_conf(cfg);
}
// Allocate memory for each IPv6 prefix
ipv6_pref[i] = (struct ipv6_prefixes *) malloc(sizeof(struct ipv6_prefixes));
ipv6_pref[i]->addr = (i6addrf);
ipv6_pref[i]->maskbits = addr_maskbits;
}
// Store prefixes in the config struct
cs.ipv6_net_prefixes = ipv6_pref;
cs.ipv6_net_prefixes_qty = ipv6_pref_qty;
// Validate port ranges
port_first = cfg_getint(cfg_ipv6, "ipv6_tcp_port_range_first");
port_last = cfg_getint(cfg_ipv6, "ipv6_tcp_port_range_last");
sprintf(which, "TCP");
if ( validate_ports_range(port_first, port_last) == EXIT_FAILURE )
{
printf("Error: Invalid %s ports range.\n", which);
exit_error_conf(cfg);
}
cs.ipv6_tcp_port_range_first = port_first;
cs.ipv6_tcp_port_range_last = port_last;
printf("\t%s pool port range: %d-%d\n", which, port_first, port_last);
//
port_first = cfg_getint(cfg_ipv6, "ipv6_udp_port_range_first");
port_last = cfg_getint(cfg_ipv6, "ipv6_udp_port_range_last");
sprintf(which, "UDP");
if ( validate_ports_range(port_first, port_last) == EXIT_FAILURE )
{
printf("Error: Invalid %s ports range.\n", which);
exit_error_conf(cfg);
}
cs.ipv6_udp_port_range_first = port_first;
cs.ipv6_udp_port_range_last = port_last;
printf("\t%s pool port range: %d-%d\n", which, port_first, port_last);
printf ("\n" );
}
cfg_free(cfg);
/* We got the configuration structure, now send it to the module
* using netlink sockets. */
// Reserve memory for netlink socket
nls = nl_socket_alloc();
if (!nls) {
printf("bad nl_socket_alloc\n");
return EXIT_FAILURE;
}
// Bind and connect the socket to kernel
ret = nl_connect(nls, NETLINK_USERSOCK);
if (ret < 0) {
nl_perror(ret, "nl_connect");
nl_socket_free(nls);
return EXIT_FAILURE;
}
// Send socket to module
ret = nl_send_simple(nls, MSG_TYPE_CONF, 0, &(cs), sizeof(cs));
if (ret < 0) {
nl_perror(ret, "nl_send_simple");
printf("Error sending message, is module loaded?\n");
nl_close(nls);
nl_socket_free(nls);
return EXIT_FAILURE;
} else {
printf("Message sent (%d bytes):\n", ret);
//print_nat64_run_conf(nrc);
}
nl_close(nls);
nl_socket_free(nls);
exit(EXIT_SUCCESS);
}