WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Affero General Public License for more details.
-
+
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
SPDX-License-Identifier: AGPL3.0-or-later
-*/
+ */
/**
* @file util/server_mst.c
/**
* Handle to a message stream tokenizer.
*/
-struct GNUNET_SERVER_MessageStreamTokenizer
-{
-
+struct GNUNET_SERVER_MessageStreamTokenizer {
/**
* Function to call on completed messages.
*/
* Beginning of the buffer. Typed like this to force alignment.
*/
struct GNUNET_MessageHeader *hdr;
-
};
* @return handle to tokenizer
*/
struct GNUNET_SERVER_MessageStreamTokenizer *
-GNUNET_SERVER_mst_create (GNUNET_SERVER_MessageTokenizerCallback cb,
- void *cb_cls)
+GNUNET_SERVER_mst_create(GNUNET_SERVER_MessageTokenizerCallback cb,
+ void *cb_cls)
{
struct GNUNET_SERVER_MessageStreamTokenizer *ret;
- ret = GNUNET_new (struct GNUNET_SERVER_MessageStreamTokenizer);
- ret->hdr = GNUNET_malloc (GNUNET_MIN_MESSAGE_SIZE);
+ ret = GNUNET_new(struct GNUNET_SERVER_MessageStreamTokenizer);
+ ret->hdr = GNUNET_malloc(GNUNET_MIN_MESSAGE_SIZE);
ret->curr_buf = GNUNET_MIN_MESSAGE_SIZE;
ret->cb = cb;
ret->cb_cls = cb_cls;
* #GNUNET_SYSERR if the data stream is corrupt
*/
int
-GNUNET_SERVER_mst_receive (struct GNUNET_SERVER_MessageStreamTokenizer *mst,
- void *client_identity,
- const char *buf, size_t size,
- int purge, int one_shot)
+GNUNET_SERVER_mst_receive(struct GNUNET_SERVER_MessageStreamTokenizer *mst,
+ void *client_identity,
+ const char *buf, size_t size,
+ int purge, int one_shot)
{
const struct GNUNET_MessageHeader *hdr;
size_t delta;
unsigned long offset;
int ret;
- GNUNET_assert (mst->off <= mst->pos);
- GNUNET_assert (mst->pos <= mst->curr_buf);
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Server-mst receives %u bytes with %u bytes already in private buffer\n",
- (unsigned int) size, (unsigned int) (mst->pos - mst->off));
+ GNUNET_assert(mst->off <= mst->pos);
+ GNUNET_assert(mst->pos <= mst->curr_buf);
+ LOG(GNUNET_ERROR_TYPE_DEBUG,
+ "Server-mst receives %u bytes with %u bytes already in private buffer\n",
+ (unsigned int)size, (unsigned int)(mst->pos - mst->off));
ret = GNUNET_OK;
- ibuf = (char *) mst->hdr;
+ ibuf = (char *)mst->hdr;
while (mst->pos > 0)
- {
-do_align:
- GNUNET_assert (mst->pos >= mst->off);
- if ((mst->curr_buf - mst->off < sizeof (struct GNUNET_MessageHeader)) ||
- (0 != (mst->off % ALIGN_FACTOR)))
- {
- /* need to align or need more space */
- mst->pos -= mst->off;
- memmove (ibuf, &ibuf[mst->off], mst->pos);
- mst->off = 0;
- }
- if (mst->pos - mst->off < sizeof (struct GNUNET_MessageHeader))
- {
- delta =
- GNUNET_MIN (sizeof (struct GNUNET_MessageHeader) -
- (mst->pos - mst->off), size);
- GNUNET_memcpy (&ibuf[mst->pos], buf, delta);
- mst->pos += delta;
- buf += delta;
- size -= delta;
- }
- if (mst->pos - mst->off < sizeof (struct GNUNET_MessageHeader))
- {
- if (purge)
- {
- mst->off = 0;
- mst->pos = 0;
- }
- return GNUNET_OK;
- }
- hdr = (const struct GNUNET_MessageHeader *) &ibuf[mst->off];
- want = ntohs (hdr->size);
- if (want < sizeof (struct GNUNET_MessageHeader))
- {
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
- if ( (mst->curr_buf - mst->off < want) &&
- (mst->off > 0) )
- {
- /* can get more space by moving */
- mst->pos -= mst->off;
- memmove (ibuf, &ibuf[mst->off], mst->pos);
- mst->off = 0;
- }
- if (mst->curr_buf < want)
- {
- /* need to get more space by growing buffer */
- GNUNET_assert (0 == mst->off);
- mst->hdr = GNUNET_realloc (mst->hdr, want);
- ibuf = (char *) mst->hdr;
- mst->curr_buf = want;
- }
- hdr = (const struct GNUNET_MessageHeader *) &ibuf[mst->off];
- if (mst->pos - mst->off < want)
- {
- delta = GNUNET_MIN (want - (mst->pos - mst->off), size);
- GNUNET_assert (mst->pos + delta <= mst->curr_buf);
- GNUNET_memcpy (&ibuf[mst->pos], buf, delta);
- mst->pos += delta;
- buf += delta;
- size -= delta;
- }
- if (mst->pos - mst->off < want)
- {
- if (purge)
- {
- mst->off = 0;
- mst->pos = 0;
- }
- return GNUNET_OK;
- }
- if (one_shot == GNUNET_SYSERR)
{
- /* cannot call callback again, but return value saying that
- * we have another full message in the buffer */
- ret = GNUNET_NO;
- goto copy;
- }
- if (one_shot == GNUNET_YES)
- one_shot = GNUNET_SYSERR;
- mst->off += want;
- if (GNUNET_SYSERR == mst->cb (mst->cb_cls, client_identity, hdr))
- return GNUNET_SYSERR;
- if (mst->off == mst->pos)
- {
- /* reset to beginning of buffer, it's free right now! */
- mst->off = 0;
- mst->pos = 0;
- }
- }
- GNUNET_assert (0 == mst->pos);
- while (size > 0)
- {
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Server-mst has %u bytes left in inbound buffer\n",
- (unsigned int) size);
- if (size < sizeof (struct GNUNET_MessageHeader))
- break;
- offset = (unsigned long) buf;
- need_align = (0 != (offset % ALIGN_FACTOR)) ? GNUNET_YES : GNUNET_NO;
- if (GNUNET_NO == need_align)
- {
- /* can try to do zero-copy and process directly from original buffer */
- hdr = (const struct GNUNET_MessageHeader *) buf;
- want = ntohs (hdr->size);
- if (want < sizeof (struct GNUNET_MessageHeader))
- {
- GNUNET_break_op (0);
- mst->off = 0;
- return GNUNET_SYSERR;
- }
- if (size < want)
- break; /* or not: buffer incomplete, so copy to private buffer... */
+do_align:
+ GNUNET_assert(mst->pos >= mst->off);
+ if ((mst->curr_buf - mst->off < sizeof(struct GNUNET_MessageHeader)) ||
+ (0 != (mst->off % ALIGN_FACTOR)))
+ {
+ /* need to align or need more space */
+ mst->pos -= mst->off;
+ memmove(ibuf, &ibuf[mst->off], mst->pos);
+ mst->off = 0;
+ }
+ if (mst->pos - mst->off < sizeof(struct GNUNET_MessageHeader))
+ {
+ delta =
+ GNUNET_MIN(sizeof(struct GNUNET_MessageHeader) -
+ (mst->pos - mst->off), size);
+ GNUNET_memcpy(&ibuf[mst->pos], buf, delta);
+ mst->pos += delta;
+ buf += delta;
+ size -= delta;
+ }
+ if (mst->pos - mst->off < sizeof(struct GNUNET_MessageHeader))
+ {
+ if (purge)
+ {
+ mst->off = 0;
+ mst->pos = 0;
+ }
+ return GNUNET_OK;
+ }
+ hdr = (const struct GNUNET_MessageHeader *)&ibuf[mst->off];
+ want = ntohs(hdr->size);
+ if (want < sizeof(struct GNUNET_MessageHeader))
+ {
+ GNUNET_break_op(0);
+ return GNUNET_SYSERR;
+ }
+ if ((mst->curr_buf - mst->off < want) &&
+ (mst->off > 0))
+ {
+ /* can get more space by moving */
+ mst->pos -= mst->off;
+ memmove(ibuf, &ibuf[mst->off], mst->pos);
+ mst->off = 0;
+ }
+ if (mst->curr_buf < want)
+ {
+ /* need to get more space by growing buffer */
+ GNUNET_assert(0 == mst->off);
+ mst->hdr = GNUNET_realloc(mst->hdr, want);
+ ibuf = (char *)mst->hdr;
+ mst->curr_buf = want;
+ }
+ hdr = (const struct GNUNET_MessageHeader *)&ibuf[mst->off];
+ if (mst->pos - mst->off < want)
+ {
+ delta = GNUNET_MIN(want - (mst->pos - mst->off), size);
+ GNUNET_assert(mst->pos + delta <= mst->curr_buf);
+ GNUNET_memcpy(&ibuf[mst->pos], buf, delta);
+ mst->pos += delta;
+ buf += delta;
+ size -= delta;
+ }
+ if (mst->pos - mst->off < want)
+ {
+ if (purge)
+ {
+ mst->off = 0;
+ mst->pos = 0;
+ }
+ return GNUNET_OK;
+ }
if (one_shot == GNUNET_SYSERR)
- {
- /* cannot call callback again, but return value saying that
- * we have another full message in the buffer */
- ret = GNUNET_NO;
- goto copy;
- }
+ {
+ /* cannot call callback again, but return value saying that
+ * we have another full message in the buffer */
+ ret = GNUNET_NO;
+ goto copy;
+ }
if (one_shot == GNUNET_YES)
one_shot = GNUNET_SYSERR;
- if (GNUNET_SYSERR == mst->cb (mst->cb_cls, client_identity, hdr))
+ mst->off += want;
+ if (GNUNET_SYSERR == mst->cb(mst->cb_cls, client_identity, hdr))
return GNUNET_SYSERR;
- buf += want;
- size -= want;
+ if (mst->off == mst->pos)
+ {
+ /* reset to beginning of buffer, it's free right now! */
+ mst->off = 0;
+ mst->pos = 0;
+ }
}
- else
+ GNUNET_assert(0 == mst->pos);
+ while (size > 0)
{
- /* need to copy to private buffer to align;
- * yes, we go a bit more spagetti than usual here */
- goto do_align;
+ LOG(GNUNET_ERROR_TYPE_DEBUG,
+ "Server-mst has %u bytes left in inbound buffer\n",
+ (unsigned int)size);
+ if (size < sizeof(struct GNUNET_MessageHeader))
+ break;
+ offset = (unsigned long)buf;
+ need_align = (0 != (offset % ALIGN_FACTOR)) ? GNUNET_YES : GNUNET_NO;
+ if (GNUNET_NO == need_align)
+ {
+ /* can try to do zero-copy and process directly from original buffer */
+ hdr = (const struct GNUNET_MessageHeader *)buf;
+ want = ntohs(hdr->size);
+ if (want < sizeof(struct GNUNET_MessageHeader))
+ {
+ GNUNET_break_op(0);
+ mst->off = 0;
+ return GNUNET_SYSERR;
+ }
+ if (size < want)
+ break; /* or not: buffer incomplete, so copy to private buffer... */
+ if (one_shot == GNUNET_SYSERR)
+ {
+ /* cannot call callback again, but return value saying that
+ * we have another full message in the buffer */
+ ret = GNUNET_NO;
+ goto copy;
+ }
+ if (one_shot == GNUNET_YES)
+ one_shot = GNUNET_SYSERR;
+ if (GNUNET_SYSERR == mst->cb(mst->cb_cls, client_identity, hdr))
+ return GNUNET_SYSERR;
+ buf += want;
+ size -= want;
+ }
+ else
+ {
+ /* need to copy to private buffer to align;
+ * yes, we go a bit more spagetti than usual here */
+ goto do_align;
+ }
}
- }
copy:
if ((size > 0) && (!purge))
- {
- if (size + mst->pos > mst->curr_buf)
{
- mst->hdr = GNUNET_realloc (mst->hdr, size + mst->pos);
- ibuf = (char *) mst->hdr;
- mst->curr_buf = size + mst->pos;
+ if (size + mst->pos > mst->curr_buf)
+ {
+ mst->hdr = GNUNET_realloc(mst->hdr, size + mst->pos);
+ ibuf = (char *)mst->hdr;
+ mst->curr_buf = size + mst->pos;
+ }
+ GNUNET_assert(size + mst->pos <= mst->curr_buf);
+ GNUNET_memcpy(&ibuf[mst->pos], buf, size);
+ mst->pos += size;
}
- GNUNET_assert (size + mst->pos <= mst->curr_buf);
- GNUNET_memcpy (&ibuf[mst->pos], buf, size);
- mst->pos += size;
- }
if (purge)
- {
- mst->off = 0;
- mst->pos = 0;
- }
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Server-mst leaves %u bytes in private buffer\n",
- (unsigned int) (mst->pos - mst->off));
+ {
+ mst->off = 0;
+ mst->pos = 0;
+ }
+ LOG(GNUNET_ERROR_TYPE_DEBUG,
+ "Server-mst leaves %u bytes in private buffer\n",
+ (unsigned int)(mst->pos - mst->off));
return ret;
}
* @param mst tokenizer to destroy
*/
void
-GNUNET_SERVER_mst_destroy (struct GNUNET_SERVER_MessageStreamTokenizer *mst)
+GNUNET_SERVER_mst_destroy(struct GNUNET_SERVER_MessageStreamTokenizer *mst)
{
- GNUNET_free (mst->hdr);
- GNUNET_free (mst);
+ GNUNET_free(mst->hdr);
+ GNUNET_free(mst);
}
projects / oweals / gnunet.git / blobdiff