* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
-#ifndef __INCLUDE_RTE_IPV4_FRAG_H__
-#define __INCLUDE_RTE_IPV4_FRAG_H__
-#include <rte_ip.h>
+#ifndef _RTE_IP_FRAG_H__
+#define _RTE_IP_FRAG_H__
/**
* @file
*
*/
-/*
- * Default byte size for the IPv4 Maximum Transfer Unit (MTU).
- * This value includes the size of IPv4 header.
- */
-#define IPV4_MTU_DEFAULT ETHER_MTU
-
-/*
- * Default payload in bytes for the IPv4 packet.
- */
-#define IPV4_DEFAULT_PAYLOAD (IPV4_MTU_DEFAULT - sizeof(struct ipv4_hdr))
-
-/*
- * MAX number of fragments per packet allowed.
- */
-#define IPV4_MAX_FRAGS_PER_PACKET 0x80
-
-
-/* Debug on/off */
-#ifdef RTE_IPV4_FRAG_DEBUG
-
-#define RTE_IPV4_FRAG_ASSERT(exp) \
-if (!(exp)) { \
- rte_panic("function %s, line%d\tassert \"" #exp "\" failed\n", \
- __func__, __LINE__); \
-}
-
-#else /*RTE_IPV4_FRAG_DEBUG*/
-
-#define RTE_IPV4_FRAG_ASSERT(exp) do { } while(0)
-
-#endif /*RTE_IPV4_FRAG_DEBUG*/
-
-/* Fragment Offset */
-#define IPV4_HDR_DF_SHIFT 14
-#define IPV4_HDR_MF_SHIFT 13
-#define IPV4_HDR_FO_SHIFT 3
-
-#define IPV4_HDR_DF_MASK (1 << IPV4_HDR_DF_SHIFT)
-#define IPV4_HDR_MF_MASK (1 << IPV4_HDR_MF_SHIFT)
-
-#define IPV4_HDR_FO_MASK ((1 << IPV4_HDR_FO_SHIFT) - 1)
-
-static inline void __fill_ipv4hdr_frag(struct ipv4_hdr *dst,
- const struct ipv4_hdr *src, uint16_t len, uint16_t fofs,
- uint16_t dofs, uint32_t mf)
-{
- rte_memcpy(dst, src, sizeof(*dst));
- fofs = (uint16_t)(fofs + (dofs >> IPV4_HDR_FO_SHIFT));
- fofs = (uint16_t)(fofs | mf << IPV4_HDR_MF_SHIFT);
- dst->fragment_offset = rte_cpu_to_be_16(fofs);
- dst->total_length = rte_cpu_to_be_16(len);
- dst->hdr_checksum = 0;
-}
-
-static inline void __free_fragments(struct rte_mbuf *mb[], uint32_t num)
-{
- uint32_t i;
- for (i = 0; i != num; i++)
- rte_pktmbuf_free(mb[i]);
-}
-
/**
* IPv4 fragmentation.
*
* The input packet.
* @param pkts_out
* Array storing the output fragments.
+ * @param nb_pkts_out
+ * Number of fragments.
* @param mtu_size
* Size in bytes of the Maximum Transfer Unit (MTU) for the outgoing IPv4
* datagrams. This value includes the size of the IPv4 header.
* @return
* Upon successful completion - number of output fragments placed
* in the pkts_out array.
- * Otherwise - (-1) * <errno>.
+ * Otherwise - (-1) * errno.
*/
-static inline int32_t rte_ipv4_fragmentation(struct rte_mbuf *pkt_in,
+int32_t rte_ipv4_fragmentation(struct rte_mbuf *pkt_in,
struct rte_mbuf **pkts_out,
uint16_t nb_pkts_out,
uint16_t mtu_size,
struct rte_mempool *pool_direct,
- struct rte_mempool *pool_indirect)
-{
- struct rte_mbuf *in_seg = NULL;
- struct ipv4_hdr *in_hdr;
- uint32_t out_pkt_pos, in_seg_data_pos;
- uint32_t more_in_segs;
- uint16_t fragment_offset, flag_offset, frag_size;
-
- frag_size = (uint16_t)(mtu_size - sizeof(struct ipv4_hdr));
-
- /* Fragment size should be a multiply of 8. */
- RTE_IPV4_FRAG_ASSERT((frag_size & IPV4_HDR_FO_MASK) == 0);
-
- /* Fragment size should be a multiply of 8. */
- RTE_IPV4_FRAG_ASSERT(IPV4_MAX_FRAGS_PER_PACKET * frag_size >=
- (uint16_t)(pkt_in->pkt.pkt_len - sizeof (struct ipv4_hdr)));
-
- in_hdr = (struct ipv4_hdr*) pkt_in->pkt.data;
- flag_offset = rte_cpu_to_be_16(in_hdr->fragment_offset);
-
- /* If Don't Fragment flag is set */
- if (unlikely ((flag_offset & IPV4_HDR_DF_MASK) != 0))
- return (-ENOTSUP);
-
- /* Check that pkts_out is big enough to hold all fragments */
- if (unlikely (frag_size * nb_pkts_out <
- (uint16_t)(pkt_in->pkt.pkt_len - sizeof (struct ipv4_hdr))))
- return (-EINVAL);
-
- in_seg = pkt_in;
- in_seg_data_pos = sizeof(struct ipv4_hdr);
- out_pkt_pos = 0;
- fragment_offset = 0;
-
- more_in_segs = 1;
- while (likely(more_in_segs)) {
- struct rte_mbuf *out_pkt = NULL, *out_seg_prev = NULL;
- uint32_t more_out_segs;
- struct ipv4_hdr *out_hdr;
-
- /* Allocate direct buffer */
- out_pkt = rte_pktmbuf_alloc(pool_direct);
- if (unlikely(out_pkt == NULL)) {
- __free_fragments(pkts_out, out_pkt_pos);
- return (-ENOMEM);
- }
-
- /* Reserve space for the IP header that will be built later */
- out_pkt->pkt.data_len = sizeof(struct ipv4_hdr);
- out_pkt->pkt.pkt_len = sizeof(struct ipv4_hdr);
-
- out_seg_prev = out_pkt;
- more_out_segs = 1;
- while (likely(more_out_segs && more_in_segs)) {
- struct rte_mbuf *out_seg = NULL;
- uint32_t len;
-
- /* Allocate indirect buffer */
- out_seg = rte_pktmbuf_alloc(pool_indirect);
- if (unlikely(out_seg == NULL)) {
- rte_pktmbuf_free(out_pkt);
- __free_fragments(pkts_out, out_pkt_pos);
- return (-ENOMEM);
- }
- out_seg_prev->pkt.next = out_seg;
- out_seg_prev = out_seg;
-
- /* Prepare indirect buffer */
- rte_pktmbuf_attach(out_seg, in_seg);
- len = mtu_size - out_pkt->pkt.pkt_len;
- if (len > (in_seg->pkt.data_len - in_seg_data_pos)) {
- len = in_seg->pkt.data_len - in_seg_data_pos;
- }
- out_seg->pkt.data = (char*) in_seg->pkt.data + (uint16_t)in_seg_data_pos;
- out_seg->pkt.data_len = (uint16_t)len;
- out_pkt->pkt.pkt_len = (uint16_t)(len +
- out_pkt->pkt.pkt_len);
- out_pkt->pkt.nb_segs += 1;
- in_seg_data_pos += len;
-
- /* Current output packet (i.e. fragment) done ? */
- if (unlikely(out_pkt->pkt.pkt_len >= mtu_size)) {
- more_out_segs = 0;
- }
-
- /* Current input segment done ? */
- if (unlikely(in_seg_data_pos == in_seg->pkt.data_len)) {
- in_seg = in_seg->pkt.next;
- in_seg_data_pos = 0;
-
- if (unlikely(in_seg == NULL)) {
- more_in_segs = 0;
- }
- }
- }
-
- /* Build the IP header */
-
- out_hdr = (struct ipv4_hdr*) out_pkt->pkt.data;
-
- __fill_ipv4hdr_frag(out_hdr, in_hdr,
- (uint16_t)out_pkt->pkt.pkt_len,
- flag_offset, fragment_offset, more_in_segs);
-
- fragment_offset = (uint16_t)(fragment_offset +
- out_pkt->pkt.pkt_len - sizeof(struct ipv4_hdr));
-
- out_pkt->ol_flags |= PKT_TX_IP_CKSUM;
- out_pkt->pkt.vlan_macip.f.l3_len = sizeof(struct ipv4_hdr);
-
- /* Write the fragment to the output list */
- pkts_out[out_pkt_pos] = out_pkt;
- out_pkt_pos ++;
- }
-
- return (out_pkt_pos);
-}
+ struct rte_mempool *pool_indirect);
#endif
git.droids-corp.org / dpdk.git / blobdiff