1 /*
2 * Copyright 2011 Daniel Drown
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 *
16 * clatd.h - main routines used by clatd
17 */
18 #ifndef __CLATD_H__
19 #define __CLATD_H__
20
21 #include <signal.h>
22 #include <stdlib.h>
23 #include <sys/uio.h>
24
25 struct tun_data;
26
27 #define MAXMTU 65536
28 #define PACKETLEN (MAXMTU + sizeof(struct tun_pi))
29 #define CLATD_VERSION "1.5"
30
31 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
32
33 // how frequently (in seconds) to poll for an address change while traffic is passing
34 #define INTERFACE_POLL_FREQUENCY 30
35
36 // how frequently (in seconds) to poll for an address change while there is no traffic
37 #define NO_TRAFFIC_INTERFACE_POLL_FREQUENCY 90
38
39 extern volatile sig_atomic_t running;
40
41 int ipv6_address_changed(const char *interface);
42 void event_loop(struct tun_data *tunnel);
43
44 /* function: parse_int
45 * parses a string as a decimal/hex/octal signed integer
46 * str - the string to parse
47 * out - the signed integer to write to, gets clobbered on failure
48 */
parse_int(const char * str,int * out)49 static inline int parse_int(const char *str, int *out) {
50 char *end_ptr;
51 *out = strtol(str, &end_ptr, 0);
52 return *str && !*end_ptr;
53 }
54
55 /* function: parse_unsigned
56 * parses a string as a decimal/hex/octal unsigned integer
57 * str - the string to parse
58 * out - the unsigned integer to write to, gets clobbered on failure
59 */
parse_unsigned(const char * str,unsigned * out)60 static inline int parse_unsigned(const char *str, unsigned *out) {
61 char *end_ptr;
62 *out = strtoul(str, &end_ptr, 0);
63 return *str && !*end_ptr;
64 }
65
66 #endif /* __CLATD_H__ */
67