+ len = ctx->hdr.data_length - ctx->hdr.data_offset;
+
+ /* Process multiple dgrams if smaller than min (buf_space, mss).
+ * This avoids handling multiple dgrams if they require buffer
+ * chains */
+ chain_limit = clib_min (n_bytes_per_buf - TRANSPORT_MAX_HDRS_LEN,
+ ctx->sp.snd_mss);
+ if (ctx->hdr.data_length <= chain_limit)
+ {
+ u32 first_dgram_len, dgram_len, offset, max_offset;
+ session_dgram_hdr_t hdr;
+
+ ctx->sp.snd_mss = clib_min (ctx->sp.snd_mss, len);
+ offset = ctx->hdr.data_length + sizeof (session_dgram_hdr_t);
+ first_dgram_len = len;
+ max_offset = clib_min (ctx->max_dequeue, 16 << 10);
+
+ while (offset < max_offset)
+ {
+ svm_fifo_peek (ctx->s->tx_fifo, offset, sizeof (ctx->hdr),
+ (u8 *) & hdr);
+ ASSERT (hdr.data_length > hdr.data_offset);
+ dgram_len = hdr.data_length - hdr.data_offset;
+ if (len + dgram_len > ctx->max_dequeue
+ || first_dgram_len != dgram_len)
+ break;
+ len += dgram_len;
+ offset += sizeof (hdr) + hdr.data_length;
+ }
+ }
+
+ ctx->max_dequeue = len;