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/*
* Copyright (c) 2006-2009 Bjorn Andersson <flex@kryo.se>, Erik Ekman <yarrick@kryo.se>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef __COMMON_H__
#define __COMMON_H__
/* Last byte of raw header is the command */
#define RAW_HDR_LEN 4
#define RAW_HDR_IDENT_LEN 3
#define RAW_HDR_CMD 3
#define RAW_HDR_CMD_LOGIN 0x10
#define RAW_HDR_CMD_DATA 0x20
#define RAW_HDR_CMD_PING 0x30
#define RAW_HDR_CMD_MASK 0xF0
#define RAW_HDR_USR_MASK 0x0F
#define RAW_HDR_GET_CMD(x) ((x)[RAW_HDR_CMD] & RAW_HDR_CMD_MASK)
#define RAW_HDR_GET_USR(x) ((x)[RAW_HDR_CMD] & RAW_HDR_USR_MASK)
extern const unsigned char raw_header[RAW_HDR_LEN];
#ifdef WINDOWS32
#include "windows.h"
#else
#include <sys/types.h>
#include <sys/socket.h>
#include <err.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#endif
#define DNS_PORT 53
#ifndef MIN
#define MIN(a,b) ((a)<(b)?(a):(b))
#endif
#ifndef MAX
#define MAX(a,b) ((a)>(b)?(a):(b))
#endif
#define QUERY_NAME_SIZE 256
#if defined IP_RECVDSTADDR
# define DSTADDR_SOCKOPT IP_RECVDSTADDR
# define dstaddr(x) ((struct in_addr *) CMSG_DATA(x))
#elif defined IP_PKTINFO
# define DSTADDR_SOCKOPT IP_PKTINFO
# define dstaddr(x) (&(((struct in_pktinfo *)(CMSG_DATA(x)))->ipi_addr))
#endif
#if defined IP_MTU_DISCOVER
/* Linux */
# define IP_OPT_DONT_FRAG IP_MTU_DISCOVER
# define DONT_FRAG_VALUE IP_PMTUDISC_DO
#elif defined IP_DONTFRAG
/* FreeBSD */
# define IP_OPT_DONT_FRAG IP_DONTFRAG
# define DONT_FRAG_VALUE 1
#elif defined IP_DONTFRAGMENT
/* Winsock2 */
# define IP_OPT_DONT_FRAG IP_DONTFRAGMENT
# define DONT_FRAG_VALUE 1
#endif
#define T_UNSET 65432
/* Unused RR type; "private use" range, see http://www.bind9.net/dns-parameters */
struct packet
{
int len; /* Total packet length */
int sentlen; /* Length of chunk currently transmitted */
int offset; /* Current offset */
char data[64*1024]; /* The data */
char seqno; /* The packet sequence number */
char fragment; /* Fragment index */
};
struct query {
char name[QUERY_NAME_SIZE];
unsigned short type;
unsigned short rcode;
unsigned short id;
struct in_addr destination;
struct sockaddr from;
int fromlen;
unsigned short id2;
struct sockaddr from2;
int fromlen2;
};
enum connection {
CONN_RAW_UDP,
CONN_DNS_NULL,
CONN_MAX
};
void check_superuser(void (*usage_fn)(void));
int open_dns(int, in_addr_t);
void close_dns(int);
void do_chroot(char *);
void do_setcon(char *);
void do_detach();
void do_pidfile(char *);
void read_password(char*, size_t);
int check_topdomain(char *);
#ifdef __ANDROID__
//#define printf(...) __android_log_print(ANDROID_LOG_DEBUG, "iodine", __VA_ARGS__)
#define printf(...) android_printf(__VA_ARGS__)
void android_printf(const char *fmt, ...);
#define fprintf(__fd_unused, ...) printf(__VA_ARGS__)
#include <android/log.h>
void err(int eval, const char *fmt, ...);
void warn(const char *fmt, ...);
void errx(int eval, const char *fmt, ...);
void warnx(const char *fmt, ...);
#elif WINDOWS32
int inet_aton(const char *cp, struct in_addr *inp);
void err(int eval, const char *fmt, ...);
void warn(const char *fmt, ...);
void errx(int eval, const char *fmt, ...);
void warnx(const char *fmt, ...);
#endif
int recent_seqno(int , int);
#endif
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