mirror of
https://github.com/yarrick/iodine.git
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112 lines
3.2 KiB
C
112 lines
3.2 KiB
C
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/*
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* Copyright (c) 2006-2015 Erik Ekman <yarrick@kryo.se>,
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* 2006-2009 Bjorn Andersson <flex@kryo.se>,
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* 2015 Frekk van Blagh <frekk@frekkworks.com>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifndef __SERVER_H__
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#define __SERVER_H__
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#ifdef WINDOWS32
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#include "windows.h"
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#include <winsock2.h>
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#else
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#include <arpa/nameser.h>
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#ifdef DARWIN
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#define BIND_8_COMPAT
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#include <arpa/nameser_compat.h>
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#endif
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#define _XPG4_2
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#include <netinet/in_systm.h>
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#include <netinet/ip.h>
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#include <grp.h>
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#include <sys/uio.h>
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#include <pwd.h>
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#include <netdb.h>
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#include <syslog.h>
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#endif
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#define DNSCACHE_LEN 10
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/* Undefine to disable. Should be less than 18; also see comments in iodined.c */
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#define QMEMPING_LEN 30
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/* Max advisable: 64k/2 = 32000. Total mem usage: QMEMPING_LEN * USERS * 6 bytes */
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#define QMEMDATA_LEN 15
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/* Max advisable: 36/2 = 18. Total mem usage: QMEMDATA_LEN * USERS * 6 bytes */
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#define PASSWORD_ENV_VAR "IODINED_PASS"
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#if defined IP_RECVDSTADDR
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# define DSTADDR_SOCKOPT IP_RECVDSTADDR
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# define dstaddr(x) ((struct in_addr *) CMSG_DATA(x))
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#elif defined IP_PKTINFO
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# define DSTADDR_SOCKOPT IP_PKTINFO
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# define dstaddr(x) (&(((struct in_pktinfo *)(CMSG_DATA(x)))->ipi_addr))
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#endif
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#ifndef IPV6_RECVPKTINFO
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#define IPV6_RECVPKTINFO IPV6_PKTINFO
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#endif
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#if !defined(BSD) && !defined(__GLIBC__)
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static char *__progname;
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#endif
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/* Struct with IPv4 and IPv6 file descriptors.
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* Need to be passed on down to tunneling code since we can get a
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* packet on one fd meant for a user on the other.
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*/
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struct dnsfd {
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int v4fd;
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int v6fd;
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};
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typedef enum {
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VERSION_ACK,
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VERSION_NACK,
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VERSION_FULL
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} version_ack_t;
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extern char *topdomain;
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extern char password[33];
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extern struct encoder *b32;
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extern struct encoder *b64;
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extern struct encoder *b64u;
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extern struct encoder *b128;
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extern int check_ip;
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extern int my_mtu;
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extern in_addr_t my_ip;
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extern int netmask;
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extern in_addr_t ns_ip;
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extern int bind_port;
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extern int debug;
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void server_init();
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void server_stop();
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int server_tunnel(int tun_fd, struct dnsfd *dns_fds, int bind_fd, int max_idle_time);
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int read_dns(int fd, struct dnsfd *dns_fds, int tun_fd, struct query *q);
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void write_dns(int fd, struct query *q, char *data, int datalen, char downenc);
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void handle_full_packet(int tun_fd, struct dnsfd *dns_fds, int userid, uint8_t *data, size_t len);
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void handle_null_request(int tun_fd, int dns_fd, struct dnsfd *dns_fds, struct query *q, int domain_len);
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void handle_ns_request(int dns_fd, struct query *q);
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void handle_a_request(int dns_fd, struct query *q, int fakeip);
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#endif /* __SERVER_H__ */
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