76 lines
2.6 KiB
C
76 lines
2.6 KiB
C
/*
|
|
* Copyright 2011 Daniel Drown
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*
|
|
* clatd.h - main routines used by clatd
|
|
*/
|
|
#ifndef __CLATD_H__
|
|
#define __CLATD_H__
|
|
|
|
#include <signal.h>
|
|
#include <stdlib.h>
|
|
#include <sys/uio.h>
|
|
|
|
struct tun_data;
|
|
|
|
#define MAXMTU 1500
|
|
#define PACKETLEN (MAXMTU + sizeof(struct tun_pi))
|
|
#define CLATD_VERSION "1.4"
|
|
|
|
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
|
|
|
|
// how frequently (in seconds) to poll for an address change while traffic is passing
|
|
#define INTERFACE_POLL_FREQUENCY 30
|
|
|
|
// how frequently (in seconds) to poll for an address change while there is no traffic
|
|
#define NO_TRAFFIC_INTERFACE_POLL_FREQUENCY 90
|
|
|
|
extern volatile sig_atomic_t running;
|
|
|
|
void configure_tun_ip(const struct tun_data *tunnel, const char *v4_addr, int mtu);
|
|
void set_capability(uint64_t target_cap);
|
|
void drop_root_but_keep_caps();
|
|
void open_sockets(struct tun_data *tunnel, uint32_t mark);
|
|
int ipv6_address_changed(const char *interface);
|
|
int configure_clat_ipv6_address(const struct tun_data *tunnel, const char *interface,
|
|
const char *src_addr);
|
|
int detect_mtu(const struct in6_addr *plat_subnet, uint32_t plat_suffix, uint32_t mark);
|
|
void configure_interface(const char *uplink_interface, const char *plat_prefix, const char *v4_addr,
|
|
const char *v6, struct tun_data *tunnel, uint32_t mark);
|
|
void event_loop(struct tun_data *tunnel);
|
|
|
|
/* function: parse_int
|
|
* parses a string as a decimal/hex/octal signed integer
|
|
* str - the string to parse
|
|
* out - the signed integer to write to, gets clobbered on failure
|
|
*/
|
|
static inline int parse_int(const char *str, int *out) {
|
|
char *end_ptr;
|
|
*out = strtol(str, &end_ptr, 0);
|
|
return *str && !*end_ptr;
|
|
}
|
|
|
|
/* function: parse_unsigned
|
|
* parses a string as a decimal/hex/octal unsigned integer
|
|
* str - the string to parse
|
|
* out - the unsigned integer to write to, gets clobbered on failure
|
|
*/
|
|
static inline int parse_unsigned(const char *str, unsigned *out) {
|
|
char *end_ptr;
|
|
*out = strtoul(str, &end_ptr, 0);
|
|
return *str && !*end_ptr;
|
|
}
|
|
|
|
#endif /* __CLATD_H__ */
|