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