-/*
- * dgnc_sniff - Dump data out to the "sniff" buffer if the
- * proc sniff file is opened...
- */
-void dgnc_sniff_nowait_nolock(struct channel_t *ch, unsigned char *text, unsigned char *buf, int len)
-{
- struct timeval tv;
- int n;
- int r;
- int nbuf;
- int i;
- int tmpbuflen;
- char *tmpbuf;
- char *p;
- int too_much_data;
-
- tmpbuf = kzalloc(TMPBUFLEN, GFP_ATOMIC);
- if (!tmpbuf)
- return;
- p = tmpbuf;
-
- /* Leave if sniff not open */
- if (!(ch->ch_sniff_flags & SNIFF_OPEN))
- goto exit;
-
- do_gettimeofday(&tv);
-
- /* Create our header for data dump */
- p += sprintf(p, "<%ld %ld><%s><", tv.tv_sec, tv.tv_usec, text);
- tmpbuflen = p - tmpbuf;
-
- do {
- too_much_data = 0;
-
- for (i = 0; i < len && tmpbuflen < (TMPBUFLEN - 4); i++) {
- p += sprintf(p, "%02x ", *buf);
- buf++;
- tmpbuflen = p - tmpbuf;
- }
-
- if (tmpbuflen < (TMPBUFLEN - 4)) {
- if (i > 0)
- p += sprintf(p - 1, "%s\n", ">");
- else
- p += sprintf(p, "%s\n", ">");
- } else {
- too_much_data = 1;
- len -= i;
- }
-
- nbuf = strlen(tmpbuf);
- p = tmpbuf;
-
- /*
- * Loop while data remains.
- */
- while (nbuf > 0 && ch->ch_sniff_buf) {
- /*
- * Determine the amount of available space left in the
- * buffer. If there's none, wait until some appears.
- */
- n = (ch->ch_sniff_out - ch->ch_sniff_in - 1) & SNIFF_MASK;
-
- /*
- * If there is no space left to write to in our sniff buffer,
- * we have no choice but to drop the data.
- * We *cannot* sleep here waiting for space, because this
- * function was probably called by the interrupt/timer routines!
- */
- if (n == 0)
- goto exit;
-
- /*
- * Copy as much data as will fit.
- */
-
- if (n > nbuf)
- n = nbuf;
-
- r = SNIFF_MAX - ch->ch_sniff_in;
-
- if (r <= n) {
- memcpy(ch->ch_sniff_buf + ch->ch_sniff_in, p, r);
-
- n -= r;
- ch->ch_sniff_in = 0;
- p += r;
- nbuf -= r;
- }
-
- memcpy(ch->ch_sniff_buf + ch->ch_sniff_in, p, n);
-
- ch->ch_sniff_in += n;
- p += n;
- nbuf -= n;
-
- /*
- * Wakeup any thread waiting for data
- */
- if (ch->ch_sniff_flags & SNIFF_WAIT_DATA) {
- ch->ch_sniff_flags &= ~SNIFF_WAIT_DATA;
- wake_up_interruptible(&ch->ch_sniff_wait);
- }
- }
-
- /*
- * If the user sent us too much data to push into our tmpbuf,
- * we need to keep looping around on all the data.
- */
- if (too_much_data) {
- p = tmpbuf;
- tmpbuflen = 0;
- }
-
- } while (too_much_data);
-
-exit:
- kfree(tmpbuf);
-}
-
-