1 /* UNIX RFCNB (RFC1001/RFC1002) NetBIOS implementation
6 Copyright (C) Richard Sharpe 1996
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 2 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program; if not, write to the Free Software
23 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
28 typedef unsigned short uint16;
32 #include <netinet/in.h>
34 #include "rfcnb-error.h"
35 #include "rfcnb-common.h"
36 #include "byteorder.h"
38 #define RFCNB_Default_Port 139
40 #define RFCNB_MAX_STATS 1
42 /* Protocol defines we need */
44 #define RFCNB_SESSION_MESSAGE 0
45 #define RFCNB_SESSION_REQUEST 0x81
46 #define RFCNB_SESSION_ACK 0x82
47 #define RFCNB_SESSION_REJ 0x83
48 #define RFCNB_SESSION_RETARGET 0x84
49 #define RFCNB_SESSION_KEEP_ALIVE 0x85
53 typedef struct redirect_addr * redirect_ptr;
55 struct redirect_addr {
57 struct in_addr ip_addr;
63 typedef struct RFCNB_Con {
65 int fd; /* File descripter for TCP/IP connection */
66 int rfc_errno; /* last error */
67 int timeout; /* How many milli-secs before IO times out */
68 int redirects; /* How many times we were redirected */
69 struct redirect_addr *redirect_list; /* First is first address */
70 struct redirect_addr *last_addr;
74 typedef char RFCNB_Hdr[4]; /* The header is 4 bytes long with */
75 /* char[0] as the type, char[1] the */
76 /* flags, and char[2..3] the length */
78 /* Macros to extract things from the header. These are for portability
79 between architecture types where we are worried about byte order */
81 #define RFCNB_Pkt_Hdr_Len 4
82 #define RFCNB_Pkt_Sess_Len 72
83 #define RFCNB_Pkt_Retarg_Len 10
84 #define RFCNB_Pkt_Nack_Len 5
85 #define RFCNB_Pkt_Type_Offset 0
86 #define RFCNB_Pkt_Flags_Offset 1
87 #define RFCNB_Pkt_Len_Offset 2 /* Length is 2 bytes plus a flag bit */
88 #define RFCNB_Pkt_N1Len_Offset 4
89 #define RFCNB_Pkt_Called_Offset 5
90 #define RFCNB_Pkt_N2Len_Offset 38
91 #define RFCNB_Pkt_Calling_Offset 39
92 #define RFCNB_Pkt_Error_Offset 4
93 #define RFCNB_Pkt_IP_Offset 4
94 #define RFCNB_Pkt_Port_Offset 8
96 /* The next macro isolates the length of a packet, including the bit in the
99 #define RFCNB_Pkt_Len(p) (PVAL(p, 3) | (PVAL(p, 2) << 8) | \
100 ((PVAL(p, RFCNB_Pkt_Flags_Offset) & 0x01) << 16))
102 #define RFCNB_Put_Pkt_Len(p, v) ((p)[1] = (((v) >> 16) & 1)); \
103 ((p)[2] = (((v) >> 8) & 0xFF)); \
104 ((p)[3] = ((v) & 0xFF));
106 #define RFCNB_Pkt_Type(p) (CVAL(p, RFCNB_Pkt_Type_Offset))
108 /* Static variables */
110 /* Only declare this if not defined */
113 extern int RFCNB_errno;
114 extern int RFCNB_saved_errno; /* Save this from point of error */