/* UNIX RFCNB (RFC1001/RFC1002) NetBIOS implementation *  * Version 1.0 * RFCNB Defines *  * Copyright (C) Richard Sharpe 1996 *  *//* * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. *  * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the * GNU General Public License for more details. *  * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. *//* Defines we need */#define GLOBAL extern#include "rfcnb-error.h"#include "rfcnb-common.h"#include "byteorder.h"#ifdef RFCNB_PORT#define RFCNB_Default_Port RFCNB_PORT#else#define RFCNB_Default_Port 139#endif#define RFCNB_MAX_STATS 1/* Protocol defines we need */#define RFCNB_SESSION_MESSAGE 0#define RFCNB_SESSION_REQUEST 0x81#define RFCNB_SESSION_ACK 0x82#define RFCNB_SESSION_REJ 0x83#define RFCNB_SESSION_RETARGET 0x84#define RFCNB_SESSION_KEEP_ALIVE 0x85/* Structures      */typedef struct redirect_addr *redirect_ptr;struct redirect_addr {    struct in_addr ip_addr;    int port;    redirect_ptr next;};typedef struct RFCNB_Con {    int fd;			/* File descripter for TCP/IP connection */    int rfc_errno;		/* last error                            */    int timeout;		/* How many milli-secs before IO times out */    int redirects;		/* How many times we were redirected     */    struct redirect_addr *redirect_list;	/* First is first address */    struct redirect_addr *last_addr;} RFCNB_Con;typedef char RFCNB_Hdr[4];	/* The header is 4 bytes long with  */				    /* char[0] as the type, char[1] the */				    /* flags, and char[2..3] the length *//* Macros to extract things from the header. These are for portability * between architecture types where we are worried about byte order     */#define RFCNB_Pkt_Hdr_Len        4#define RFCNB_Pkt_Sess_Len       72#define RFCNB_Pkt_Retarg_Len     10#define RFCNB_Pkt_Nack_Len       5#define RFCNB_Pkt_Type_Offset    0#define RFCNB_Pkt_Flags_Offset   1#define RFCNB_Pkt_Len_Offset     2	/* Length is 2 bytes plus a flag bit */#define RFCNB_Pkt_N1Len_Offset   4#define RFCNB_Pkt_Called_Offset  5#define RFCNB_Pkt_N2Len_Offset   38#define RFCNB_Pkt_Calling_Offset 39#define RFCNB_Pkt_Error_Offset   4#define RFCNB_Pkt_IP_Offset      4#define RFCNB_Pkt_Port_Offset    8/* The next macro isolates the length of a packet, including the bit in the * flags                                                                   */#define RFCNB_Pkt_Len(p)  (PVAL(p, 3) | (PVAL(p, 2) << 8) |     \                          ((PVAL(p, RFCNB_Pkt_Flags_Offset) & 0x01) << 16))#define RFCNB_Put_Pkt_Len(p, v) (p[1] = ((v >> 16) & 1)); \				(p[2] = ((v >> 8) & 0xFF)); \				(p[3] = (v & 0xFF));#define RFCNB_Pkt_Type(p) (CVAL(p, RFCNB_Pkt_Type_Offset))/*typedef struct RFCNB_Hdr { *  * unsigned char type; * unsigned char flags; * int16 len; *  * } RFCNB_Hdr; *  * typedef struct RFCNB_Sess_Pkt { * unsigned char type; * unsigned char flags; * int16 length; * unsigned char n1_len; * char called_name[33]; * unsigned char n2_len; * char calling_name[33]; * } RFCNB_Sess_Pkt; *  *  * typedef struct RFCNB_Nack_Pkt { *  * struct RFCNB_Hdr hdr; * unsigned char error; *  * } RFCNB_Nack_Pkt; *  * typedef struct RFCNB_Retarget_Pkt { *  * struct RFCNB_Hdr hdr; * int dest_ip; * unsigned char port; *  * } RFCNB_Redir_Pkt; *//* Static variables *//* Only declare this if not defined */#ifndef RFCNB_ERRNOextern int RFCNB_errno;extern int RFCNB_saved_errno;	/* Save this from point of error */#endif