2 * Copyright (c) 1997 Adrian Sun (asun@zoology.washington.edu)
10 #include <sys/types.h>
14 #include <netinet/in.h>
15 #include <atalk/afp.h>
16 #include <atalk/server_child.h>
17 #include <netatalk/endian.h>
19 /* What a DSI packet looks like:
21 |-------------------------------|
22 |flags |command| requestID |
23 |-------------------------------|
24 |error code/enclosed data offset|
25 |-------------------------------|
27 |-------------------------------|
29 |-------------------------------|
31 CONVENTION: anything with a dsi_ prefix is kept in network byte order.
34 /* these need to be kept in sync w/ AFPTRANS_* in <atalk/afp.h>.
35 * convention: AFPTRANS_* = (1 << DSI_*) */
42 #define DSI_BLOCKSIZ 16
44 u_int8_t dsi_flags; /* packet type: request or reply */
45 u_int8_t dsi_command; /* command */
46 u_int16_t dsi_requestID; /* request ID */
47 u_int32_t dsi_code; /* error code or data offset */
48 u_int32_t dsi_len; /* total data length */
49 u_int32_t dsi_reserved; /* reserved field */
52 #define DSI_CMDSIZ 800
53 #define DSI_DATASIZ 8192
54 /* child and parent processes might interpret a couple of these
58 struct dsi_block header;
59 struct sockaddr_in server, client;
61 struct itimerval timer, savetimer;
62 u_int32_t attn_quantum, datasize, server_quantum;
63 u_int16_t serverID, clientID;
64 u_int8_t *status, commands[DSI_CMDSIZ], data[DSI_DATASIZ];
66 unsigned int datalen, cmdlen;
67 size_t read_count, write_count;
68 /* inited = initialized?, child = a child?, noreply = send reply? */
69 char child, inited, noreply;
71 int socket, serversock;
73 /* protocol specific open/close, send/receive
74 * send/receive fill in the header and use dsi->commands.
75 * write/read just write/read data */
76 pid_t (*proto_open)(struct DSI *);
77 void (*proto_close)(struct DSI *);
81 #define DSIFL_REQUEST 0x00
82 #define DSIFL_REPLY 0x01
83 #define DSIFL_MAX 0x01
85 /* DSI session options */
86 #define DSIOPT_SERVQUANT 0x00 /* server request quantum */
87 #define DSIOPT_ATTNQUANT 0x01 /* attention quantum */
90 #define DSIFUNC_CLOSE 1 /* DSICloseSession */
91 #define DSIFUNC_CMD 2 /* DSICommand */
92 #define DSIFUNC_STAT 3 /* DSIGetStatus */
93 #define DSIFUNC_OPEN 4 /* DSIOpenSession */
94 #define DSIFUNC_TICKLE 5 /* DSITickle */
95 #define DSIFUNC_WRITE 6 /* DSIWrite */
96 #define DSIFUNC_ATTN 8 /* DSIAttention */
97 #define DSIFUNC_MAX 8 /* largest command */
99 /* DSI Error codes: most of these aren't used. */
100 #define DSIERR_OK 0x0000
101 #define DSIERR_BADVERS 0xfbd6
102 #define DSIERR_BUFSMALL 0xfbd5
103 #define DSIERR_NOSESS 0xfbd4
104 #define DSIERR_NOSERV 0xfbd3
105 #define DSIERR_PARM 0xfbd2
106 #define DSIERR_SERVBUSY 0xfbd1
107 #define DSIERR_SESSCLOS 0xfbd0
108 #define DSIERR_SIZERR 0xfbcf
109 #define DSIERR_TOOMANY 0xfbce
110 #define DSIERR_NOACK 0xfbcd
112 /* server and client quanta */
113 #define DSI_DEFQUANT 2 /* default attention quantum size */
114 #define DSI_SERVQUANT_MAX 0xffffffffL /* server quantum */
115 #define DSI_SERVQUANT_MIN 0x0004A2E0L /* minimum server quantum */
116 #define DSI_SERVQUANT_DEF DSI_SERVQUANT_MIN /* default server quantum */
118 /* default port number */
119 #define DSI_AFPOVERTCP_PORT 548
121 /* basic initialization: dsi_init.c */
122 extern DSI *dsi_init __P((const dsi_proto /*protocol*/,
123 const char * /*program*/,
124 const char * /*host*/, const char * /*address*/,
125 const int /*port*/, const int /*proxy*/,
126 const u_int32_t /* server quantum */));
127 extern void dsi_setstatus __P((DSI *, u_int8_t *, const int));
129 /* in dsi_getsess.c */
130 extern DSI *dsi_getsession __P((DSI *, server_child *, const int));
131 extern void dsi_kill __P((int));
134 /* DSI Commands: individual files */
135 extern void dsi_opensession __P((DSI *));
136 extern int dsi_attention __P((DSI *, AFPUserBytes));
137 extern int dsi_cmdreply __P((DSI *, const int));
138 extern void dsi_tickle __P((DSI *));
139 extern void dsi_getstatus __P((DSI *));
140 extern void dsi_close __P((DSI *));
142 /* low-level stream commands -- in dsi_stream.c */
143 extern size_t dsi_stream_write __P((DSI *, void *, const size_t));
144 extern size_t dsi_stream_read __P((DSI *, void *, const size_t));
145 extern int dsi_stream_send __P((DSI *, void *, size_t));
146 extern int dsi_stream_receive __P((DSI *, void *, const size_t, size_t *));
148 /* client writes -- dsi_write.c */
149 extern size_t dsi_writeinit __P((DSI *, void *, const size_t));
150 extern size_t dsi_write __P((DSI *, void *, const size_t));
151 extern void dsi_writeflush __P((DSI *));
152 #define dsi_wrtreply(a,b) dsi_cmdreply(a,b)
154 /* client reads -- dsi_read.c */
155 extern ssize_t dsi_readinit __P((DSI *, void *, const size_t, const size_t,
157 extern ssize_t dsi_read __P((DSI *, void *, const size_t));
158 extern void dsi_readdone __P((DSI *));
160 /* some useful macros */
161 #define dsi_serverID(x) ((x)->serverID++)
162 #define dsi_send(x) do { \
163 (x)->header.dsi_len = htonl((x)->cmdlen); \
164 dsi_stream_send((x), (x)->commands, (x)->cmdlen); \
166 #define dsi_receive(x) (dsi_stream_receive((x), (x)->commands, \
167 DSI_CMDSIZ, &(x)->cmdlen))
168 #endif /* atalk/dsi.h */