diff options
| -rw-r--r-- | net/ipv4/tcp.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index 73266b7..90b2f3c 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -2478,9 +2478,9 @@ struct sk_buff **tcp_gro_receive(struct sk_buff **head, struct sk_buff *skb) struct tcphdr *th2; unsigned int thlen; unsigned int flags; - unsigned int total; unsigned int mss = 1; int flush = 1; + int i; th = skb_gro_header(skb, sizeof(*th)); if (unlikely(!th)) @@ -2504,7 +2504,7 @@ struct sk_buff **tcp_gro_receive(struct sk_buff **head, struct sk_buff *skb) th2 = tcp_hdr(p); - if (th->source != th2->source || th->dest != th2->dest) { + if ((th->source ^ th2->source) | (th->dest ^ th2->dest)) { NAPI_GRO_CB(p)->same_flow = 0; continue; } @@ -2519,14 +2519,15 @@ found: flush |= flags & TCP_FLAG_CWR; flush |= (flags ^ tcp_flag_word(th2)) & ~(TCP_FLAG_CWR | TCP_FLAG_FIN | TCP_FLAG_PSH); - flush |= th->ack_seq != th2->ack_seq || th->window != th2->window; - flush |= memcmp(th + 1, th2 + 1, thlen - sizeof(*th)); + flush |= (th->ack_seq ^ th2->ack_seq) | (th->window ^ th2->window); + for (i = sizeof(*th); !flush && i < thlen; i += 4) + flush |= *(u32 *)((u8 *)th + i) ^ + *(u32 *)((u8 *)th2 + i); - total = skb_gro_len(p); mss = skb_shinfo(p)->gso_size; - flush |= skb_gro_len(skb) > mss || !skb_gro_len(skb); - flush |= ntohl(th2->seq) + total != ntohl(th->seq); + flush |= (skb_gro_len(skb) > mss) | !skb_gro_len(skb); + flush |= (ntohl(th2->seq) + skb_gro_len(p)) ^ ntohl(th->seq); if (flush || skb_gro_receive(head, skb)) { mss = 1; |