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 8192
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 sigset_t sigblockset, oldset;
63 struct itimerval timer;
65 int in_write; /* in the middle of writing multiple packets, signal handlers
66 * can't write to the socket
68 int msg_request; /* pending message to the client */
70 u_int32_t attn_quantum, datasize, server_quantum;
71 u_int16_t serverID, clientID;
73 u_int8_t commands[DSI_CMDSIZ], data[DSI_DATASIZ];
75 size_t datalen, cmdlen;
76 size_t read_count, write_count;
77 int asleep; /* client won't reply AFP 0x7a ? */
78 /* inited = initialized?, child = a child?, noreply = send reply? */
79 char child, inited, noreply;
81 int socket, serversock;
83 /* protocol specific open/close, send/receive
84 * send/receive fill in the header and use dsi->commands.
85 * write/read just write/read data */
86 pid_t (*proto_open)(struct DSI *);
87 void (*proto_close)(struct DSI *);
89 /* url registered with slpd */
94 /* buffer for OSX deadlock */
105 #define DSIFL_REQUEST 0x00
106 #define DSIFL_REPLY 0x01
107 #define DSIFL_MAX 0x01
109 /* DSI session options */
110 #define DSIOPT_SERVQUANT 0x00 /* server request quantum */
111 #define DSIOPT_ATTNQUANT 0x01 /* attention quantum */
114 #define DSIFUNC_CLOSE 1 /* DSICloseSession */
115 #define DSIFUNC_CMD 2 /* DSICommand */
116 #define DSIFUNC_STAT 3 /* DSIGetStatus */
117 #define DSIFUNC_OPEN 4 /* DSIOpenSession */
118 #define DSIFUNC_TICKLE 5 /* DSITickle */
119 #define DSIFUNC_WRITE 6 /* DSIWrite */
120 #define DSIFUNC_ATTN 8 /* DSIAttention */
121 #define DSIFUNC_MAX 8 /* largest command */
123 /* DSI Error codes: most of these aren't used. */
124 #define DSIERR_OK 0x0000
125 #define DSIERR_BADVERS 0xfbd6
126 #define DSIERR_BUFSMALL 0xfbd5
127 #define DSIERR_NOSESS 0xfbd4
128 #define DSIERR_NOSERV 0xfbd3
129 #define DSIERR_PARM 0xfbd2
130 #define DSIERR_SERVBUSY 0xfbd1
131 #define DSIERR_SESSCLOS 0xfbd0
132 #define DSIERR_SIZERR 0xfbcf
133 #define DSIERR_TOOMANY 0xfbce
134 #define DSIERR_NOACK 0xfbcd
136 /* server and client quanta */
137 #define DSI_DEFQUANT 2 /* default attention quantum size */
138 #define DSI_SERVQUANT_MAX 0xffffffff /* server quantum */
139 #define DSI_SERVQUANT_MIN 32000 /* minimum server quantum */
140 #define DSI_SERVQUANT_DEF 0x0004A2E0L /* default server quantum */
142 /* default port number */
143 #define DSI_AFPOVERTCP_PORT 548
145 /* basic initialization: dsi_init.c */
146 extern DSI *dsi_init (const dsi_proto /*protocol*/,
147 const char * /*program*/,
148 const char * /*host*/, const char * /*address*/,
149 const int /*port*/, const int /*proxy*/,
150 const u_int32_t /* server quantum */);
151 extern void dsi_setstatus (DSI *, char *, const size_t);
153 /* in dsi_getsess.c */
154 extern DSI *dsi_getsession (DSI *, server_child *, const int);
155 extern void dsi_kill (int);
158 /* DSI Commands: individual files */
159 extern void dsi_opensession (DSI *);
160 extern int dsi_attention (DSI *, AFPUserBytes);
161 extern int dsi_cmdreply (DSI *, const int);
162 extern int dsi_tickle (DSI *);
163 extern void dsi_getstatus (DSI *);
164 extern void dsi_close (DSI *);
165 extern void dsi_sleep (DSI *, const int );
167 /* set, unset socket blocking mode */
168 extern int dsi_block (DSI *, const int);
170 /* low-level stream commands -- in dsi_stream.c */
171 extern size_t dsi_stream_write (DSI *, void *, const size_t, const int mode);
172 extern size_t dsi_stream_read (DSI *, void *, const size_t);
173 extern int dsi_stream_send (DSI *, void *, size_t);
174 extern int dsi_stream_receive (DSI *, void *, const size_t, size_t *);
176 /* client writes -- dsi_write.c */
177 extern size_t dsi_writeinit (DSI *, void *, const size_t);
178 extern size_t dsi_write (DSI *, void *, const size_t);
179 extern void dsi_writeflush (DSI *);
180 #define dsi_wrtreply(a,b) dsi_cmdreply(a,b)
182 /* client reads -- dsi_read.c */
183 extern ssize_t dsi_readinit (DSI *, void *, const size_t, const size_t,
185 extern ssize_t dsi_read (DSI *, void *, const size_t);
186 extern void dsi_readdone (DSI *);
188 /* some useful macros */
189 #define dsi_serverID(x) ((x)->serverID++)
190 #define dsi_send(x) do { \
191 (x)->header.dsi_len = htonl((x)->cmdlen); \
192 dsi_stream_send((x), (x)->commands, (x)->cmdlen); \
194 #define dsi_receive(x) (dsi_stream_receive((x), (x)->commands, \
195 DSI_CMDSIZ, &(x)->cmdlen))
196 #endif /* atalk/dsi.h */