#include <rte_mbuf.h>
#include <rte_cycles.h>
#include <rte_ethdev.h>
-#include <rte_ip.h>
-#include <rte_tcp.h>
#include "gro_tcp4.h"
rte_free(tcp_tbl);
}
-/*
- * merge two TCP/IPv4 packets without updating checksums.
- * If cmp is larger than 0, append the new packet to the
- * original packet. Otherwise, pre-pend the new packet to
- * the original packet.
- */
-static inline int
-merge_two_tcp4_packets(struct gro_tcp4_item *item,
- struct rte_mbuf *pkt,
- int cmp,
- uint32_t sent_seq,
- uint16_t ip_id)
-{
- struct rte_mbuf *pkt_head, *pkt_tail, *lastseg;
- uint16_t hdr_len;
-
- if (cmp > 0) {
- pkt_head = item->firstseg;
- pkt_tail = pkt;
- } else {
- pkt_head = pkt;
- pkt_tail = item->firstseg;
- }
-
- /* check if the IPv4 packet length is greater than the max value */
- hdr_len = pkt_head->l2_len + pkt_head->l3_len + pkt_head->l4_len;
- if (unlikely(pkt_head->pkt_len - pkt_head->l2_len + pkt_tail->pkt_len -
- hdr_len > MAX_IPV4_PKT_LENGTH))
- return 0;
-
- /* remove the packet header for the tail packet */
- rte_pktmbuf_adj(pkt_tail, hdr_len);
-
- /* chain two packets together */
- if (cmp > 0) {
- item->lastseg->next = pkt;
- item->lastseg = rte_pktmbuf_lastseg(pkt);
- /* update IP ID to the larger value */
- item->ip_id = ip_id;
- } else {
- lastseg = rte_pktmbuf_lastseg(pkt);
- lastseg->next = item->firstseg;
- item->firstseg = pkt;
- /* update sent_seq to the smaller value */
- item->sent_seq = sent_seq;
- }
- item->nb_merged++;
-
- /* update mbuf metadata for the merged packet */
- pkt_head->nb_segs += pkt_tail->nb_segs;
- pkt_head->pkt_len += pkt_tail->pkt_len;
-
- return 1;
-}
-
-/*
- * Check if two TCP/IPv4 packets are neighbors.
- */
-static inline int
-check_seq_option(struct gro_tcp4_item *item,
- struct tcp_hdr *tcph,
- uint32_t sent_seq,
- uint16_t ip_id,
- uint16_t tcp_hl,
- uint16_t tcp_dl)
-{
- struct rte_mbuf *pkt_orig = item->firstseg;
- struct ipv4_hdr *iph_orig;
- struct tcp_hdr *tcph_orig;
- uint16_t len, tcp_hl_orig;
-
- iph_orig = (struct ipv4_hdr *)(rte_pktmbuf_mtod(pkt_orig, char *) +
- pkt_orig->l2_len);
- tcph_orig = (struct tcp_hdr *)((char *)iph_orig + pkt_orig->l3_len);
- tcp_hl_orig = pkt_orig->l4_len;
-
- /* Check if TCP option fields equal */
- len = RTE_MAX(tcp_hl, tcp_hl_orig) - sizeof(struct tcp_hdr);
- if ((tcp_hl != tcp_hl_orig) ||
- ((len > 0) && (memcmp(tcph + 1, tcph_orig + 1,
- len) != 0)))
- return 0;
-
- /* check if the two packets are neighbors */
- len = pkt_orig->pkt_len - pkt_orig->l2_len - pkt_orig->l3_len -
- tcp_hl_orig;
- if ((sent_seq == item->sent_seq + len) && (ip_id == item->ip_id + 1))
- /* append the new packet */
- return 1;
- else if ((sent_seq + tcp_dl == item->sent_seq) &&
- (ip_id + item->nb_merged == item->ip_id))
- /* pre-pend the new packet */
- return -1;
-
- return 0;
-}
-
static inline uint32_t
find_an_empty_item(struct gro_tcp4_tbl *tbl)
{
uint64_t start_time,
uint32_t prev_idx,
uint32_t sent_seq,
- uint16_t ip_id)
+ uint16_t ip_id,
+ uint8_t is_atomic)
{
uint32_t item_idx;
tbl->items[item_idx].sent_seq = sent_seq;
tbl->items[item_idx].ip_id = ip_id;
tbl->items[item_idx].nb_merged = 1;
+ tbl->items[item_idx].is_atomic = is_atomic;
tbl->item_num++;
/* if the previous packet exists, chain them together. */
return flow_idx;
}
-/*
- * Check if two TCP/IPv4 packets belong to the same flow.
- */
-static inline int
-is_same_tcp4_flow(struct tcp4_flow_key k1, struct tcp4_flow_key k2)
-{
- return (is_same_ether_addr(&k1.eth_saddr, &k2.eth_saddr) &&
- is_same_ether_addr(&k1.eth_daddr, &k2.eth_daddr) &&
- (k1.ip_src_addr == k2.ip_src_addr) &&
- (k1.ip_dst_addr == k2.ip_dst_addr) &&
- (k1.recv_ack == k2.recv_ack) &&
- (k1.src_port == k2.src_port) &&
- (k1.dst_port == k2.dst_port));
-}
-
/*
* update the packet length for the flushed packet.
*/
struct gro_tcp4_tbl *tbl,
uint64_t start_time)
{
- struct ether_hdr *eth_hdr;
+ struct rte_ether_hdr *eth_hdr;
struct ipv4_hdr *ipv4_hdr;
struct tcp_hdr *tcp_hdr;
uint32_t sent_seq;
- uint16_t tcp_dl, ip_id, hdr_len;
+ int32_t tcp_dl;
+ uint16_t ip_id, hdr_len, frag_off;
+ uint8_t is_atomic;
struct tcp4_flow_key key;
uint32_t cur_idx, prev_idx, item_idx;
int cmp;
uint8_t find;
- eth_hdr = rte_pktmbuf_mtod(pkt, struct ether_hdr *);
+ /*
+ * Don't process the packet whose TCP header length is greater
+ * than 60 bytes or less than 20 bytes.
+ */
+ if (unlikely(INVALID_TCP_HDRLEN(pkt->l4_len)))
+ return -1;
+
+ eth_hdr = rte_pktmbuf_mtod(pkt, struct rte_ether_hdr *);
ipv4_hdr = (struct ipv4_hdr *)((char *)eth_hdr + pkt->l2_len);
tcp_hdr = (struct tcp_hdr *)((char *)ipv4_hdr + pkt->l3_len);
hdr_len = pkt->l2_len + pkt->l3_len + pkt->l4_len;
if (tcp_dl <= 0)
return -1;
- ip_id = rte_be_to_cpu_16(ipv4_hdr->packet_id);
+ /*
+ * Save IPv4 ID for the packet whose DF bit is 0. For the packet
+ * whose DF bit is 1, IPv4 ID is ignored.
+ */
+ frag_off = rte_be_to_cpu_16(ipv4_hdr->fragment_offset);
+ is_atomic = (frag_off & IPV4_HDR_DF_FLAG) == IPV4_HDR_DF_FLAG;
+ ip_id = is_atomic ? 0 : rte_be_to_cpu_16(ipv4_hdr->packet_id);
sent_seq = rte_be_to_cpu_32(tcp_hdr->sent_seq);
ether_addr_copy(&(eth_hdr->s_addr), &(key.eth_saddr));
*/
if (find == 0) {
item_idx = insert_new_item(tbl, pkt, start_time,
- INVALID_ARRAY_INDEX, sent_seq, ip_id);
+ INVALID_ARRAY_INDEX, sent_seq, ip_id,
+ is_atomic);
if (item_idx == INVALID_ARRAY_INDEX)
return -1;
if (insert_new_flow(tbl, &key, item_idx) ==
prev_idx = cur_idx;
do {
cmp = check_seq_option(&(tbl->items[cur_idx]), tcp_hdr,
- sent_seq, ip_id, pkt->l4_len, tcp_dl);
+ sent_seq, ip_id, pkt->l4_len, tcp_dl, 0,
+ is_atomic);
if (cmp) {
if (merge_two_tcp4_packets(&(tbl->items[cur_idx]),
- pkt, cmp, sent_seq, ip_id))
+ pkt, cmp, sent_seq, ip_id, 0))
return 1;
/*
* Fail to merge the two packets, as the packet
* the packet into the flow.
*/
if (insert_new_item(tbl, pkt, start_time, prev_idx,
- sent_seq, ip_id) ==
+ sent_seq, ip_id, is_atomic) ==
INVALID_ARRAY_INDEX)
return -1;
return 0;
/* Fail to find a neighbor, so store the packet into the flow. */
if (insert_new_item(tbl, pkt, start_time, prev_idx, sent_seq,
- ip_id) == INVALID_ARRAY_INDEX)
+ ip_id, is_atomic) == INVALID_ARRAY_INDEX)
return -1;
return 0;
git.droids-corp.org / dpdk.git / blobdiff