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>
20 #include <sys/socket.h>
23 /* What a DSI packet looks like:
25 |-------------------------------|
26 |flags |command| requestID |
27 |-------------------------------|
28 |error code/enclosed data offset|
29 |-------------------------------|
31 |-------------------------------|
33 |-------------------------------|
35 CONVENTION: anything with a dsi_ prefix is kept in network byte order.
38 /* these need to be kept in sync w/ AFPTRANS_* in <atalk/afp.h>.
39 * convention: AFPTRANS_* = (1 << DSI_*) */
46 #define DSI_BLOCKSIZ 16
48 u_int8_t dsi_flags; /* packet type: request or reply */
49 u_int8_t dsi_command; /* command */
50 u_int16_t dsi_requestID; /* request ID */
51 u_int32_t dsi_code; /* error code or data offset */
52 u_int32_t dsi_len; /* total data length */
53 u_int32_t dsi_reserved; /* reserved field */
56 #define DSI_CMDSIZ 8192
57 #define DSI_DATASIZ 8192
58 /* child and parent processes might interpret a couple of these
62 struct dsi_block header;
63 struct sockaddr_storage server, client;
65 struct itimerval timer;
67 int in_write; /* in the middle of writing multiple packets, signal handlers
68 * can't write to the socket
70 int msg_request; /* pending message to the client */
71 int down_request; /* pending SIGUSR1 down in 5 mn */
73 u_int32_t attn_quantum, datasize, server_quantum;
74 u_int16_t serverID, clientID;
76 u_int8_t commands[DSI_CMDSIZ], data[DSI_DATASIZ];
78 size_t datalen, cmdlen;
79 off_t read_count, write_count;
80 int asleep; /* client won't reply AFP 0x7a ? */
81 /* inited = initialized?, child = a child?, noreply = send reply? */
82 char child, inited, noreply;
84 int socket, serversock;
86 /* protocol specific open/close, send/receive
87 * send/receive fill in the header and use dsi->commands.
88 * write/read just write/read data */
89 pid_t (*proto_open)(struct DSI *);
90 void (*proto_close)(struct DSI *);
92 /* url registered with slpd */
97 /* buffer for OSX deadlock */
107 #define DSIFL_REQUEST 0x00
108 #define DSIFL_REPLY 0x01
109 #define DSIFL_MAX 0x01
111 /* DSI session options */
112 #define DSIOPT_SERVQUANT 0x00 /* server request quantum */
113 #define DSIOPT_ATTNQUANT 0x01 /* attention quantum */
116 #define DSIFUNC_CLOSE 1 /* DSICloseSession */
117 #define DSIFUNC_CMD 2 /* DSICommand */
118 #define DSIFUNC_STAT 3 /* DSIGetStatus */
119 #define DSIFUNC_OPEN 4 /* DSIOpenSession */
120 #define DSIFUNC_TICKLE 5 /* DSITickle */
121 #define DSIFUNC_WRITE 6 /* DSIWrite */
122 #define DSIFUNC_ATTN 8 /* DSIAttention */
123 #define DSIFUNC_MAX 8 /* largest command */
125 /* DSI Error codes: most of these aren't used. */
126 #define DSIERR_OK 0x0000
127 #define DSIERR_BADVERS 0xfbd6
128 #define DSIERR_BUFSMALL 0xfbd5
129 #define DSIERR_NOSESS 0xfbd4
130 #define DSIERR_NOSERV 0xfbd3
131 #define DSIERR_PARM 0xfbd2
132 #define DSIERR_SERVBUSY 0xfbd1
133 #define DSIERR_SESSCLOS 0xfbd0
134 #define DSIERR_SIZERR 0xfbcf
135 #define DSIERR_TOOMANY 0xfbce
136 #define DSIERR_NOACK 0xfbcd
138 /* server and client quanta */
139 #define DSI_DEFQUANT 2 /* default attention quantum size */
140 #define DSI_SERVQUANT_MAX 0xffffffff /* server quantum */
141 #define DSI_SERVQUANT_MIN 32000 /* minimum server quantum */
142 #define DSI_SERVQUANT_DEF 0x0004A2E0L /* default server quantum */
144 /* default port number */
145 #define DSI_AFPOVERTCP_PORT 548
147 /* basic initialization: dsi_init.c */
148 extern DSI *dsi_init (const dsi_proto /*protocol*/,
149 const char * /*program*/,
150 const char * /*host*/, const char * /*address*/,
151 const char * /*port*/, const int /*proxy*/,
152 const u_int32_t /* server quantum */);
153 extern void dsi_setstatus (DSI *, char *, const size_t);
155 /* in dsi_getsess.c */
156 extern DSI *dsi_getsession (DSI *, server_child *, const int);
157 extern void dsi_kill (int);
160 /* DSI Commands: individual files */
161 extern void dsi_opensession (DSI *);
162 extern int dsi_attention (DSI *, AFPUserBytes);
163 extern int dsi_cmdreply (DSI *, const int);
164 extern int dsi_tickle (DSI *);
165 extern void dsi_getstatus (DSI *);
166 extern void dsi_close (DSI *);
167 extern void dsi_sleep (DSI *, const int );
170 /* low-level stream commands -- in dsi_stream.c */
171 extern ssize_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 *);
177 extern ssize_t dsi_stream_read_file(DSI *, int, off_t off, const size_t len);
180 /* client writes -- dsi_write.c */
181 extern size_t dsi_writeinit (DSI *, void *, const size_t);
182 extern size_t dsi_write (DSI *, void *, const size_t);
183 extern void dsi_writeflush (DSI *);
184 #define dsi_wrtreply(a,b) dsi_cmdreply(a,b)
186 /* client reads -- dsi_read.c */
187 extern ssize_t dsi_readinit (DSI *, void *, const size_t, const size_t,
189 extern ssize_t dsi_read (DSI *, void *, const size_t);
190 extern void dsi_readdone (DSI *);
192 /* some useful macros */
193 #define dsi_serverID(x) ((x)->serverID++)
194 #define dsi_send(x) do { \
195 (x)->header.dsi_len = htonl((x)->cmdlen); \
196 dsi_stream_send((x), (x)->commands, (x)->cmdlen); \
198 #define dsi_receive(x) (dsi_stream_receive((x), (x)->commands, \
199 DSI_CMDSIZ, &(x)->cmdlen))
200 #endif /* atalk/dsi.h */