2 * $Id: dsi_attn.c,v 1.7 2009-10-22 04:59:50 didg Exp $
4 * Copyright (c) 1997 Adrian Sun (asun@zoology.washington.edu)
5 * All rights reserved. See COPYRIGHT.
10 #endif /* HAVE_CONFIG_H */
15 #include <sys/types.h>
17 #include <atalk/dsi.h>
18 #include <atalk/afp.h>
19 #include <netatalk/endian.h>
22 #define MIN(a,b) ((a) < (b) ? (a) : (b))
25 /* send an attention. this may get called at any time, so we can't use
26 * DSI buffers to send one.
30 int dsi_attention(DSI *dsi, AFPUserBytes flags)
32 /* header + AFPUserBytes */
33 char block[DSI_BLOCKSIZ + sizeof(AFPUserBytes)];
38 if (dsi->asleep || dsi->in_write)
41 id = htons(dsi_serverID(dsi));
43 len = MIN(sizeof(flags), dsi->attn_quantum);
46 memset(block, 0, sizeof(block));
47 block[0] = DSIFL_REQUEST; /* sending a request */
48 block[1] = DSIFUNC_ATTN; /* it's an attention */
49 memcpy(block + 2, &id, sizeof(id));
51 memcpy(block + 8, &nlen, sizeof(nlen));
52 memcpy(block + 16, &flags, sizeof(flags));
55 /* send an attention */
56 sigprocmask(SIG_BLOCK, &dsi->sigblockset, &oldset);
57 len = dsi_stream_write(dsi, block, DSI_BLOCKSIZ + len, 0);
58 sigprocmask(SIG_SETMASK, &oldset, NULL);