[1/3] COLO-compare: Add packet size check and some fix

Add packet size check in colo_packet_compare_udp()
and colo_packet_compare_udp(), rename function colo_packet_compare()
to colo_packet_compare_common() that we will reuse it later.

Signed-off-by: Zhang Chen <zhangchen.fnst@cn.fujitsu.com>
---
 net/colo-compare.c | 30 ++++++++++++++++++++++--------
 1 file changed, 22 insertions(+), 8 deletions(-)

Sorry, This patch has been renamed.

please ignore this patch.


Thanks

Zhang Chen


On 02/25/2017 11:32 AM, Zhang Chen wrote:
> Add packet size check in colo_packet_compare_udp()
> and colo_packet_compare_udp(), rename function colo_packet_compare()
> to colo_packet_compare_common() that we will reuse it later.
>
> Signed-off-by: Zhang Chen <zhangchen.fnst@cn.fujitsu.com>
> ---
>   net/colo-compare.c | 30 ++++++++++++++++++++++--------
>   1 file changed, 22 insertions(+), 8 deletions(-)
>
> diff --git a/net/colo-compare.c b/net/colo-compare.c
> index 300f017..e75f0ae 100644
> --- a/net/colo-compare.c
> +++ b/net/colo-compare.c
> @@ -180,7 +180,7 @@ static int packet_enqueue(CompareState *s, int mode)
>    * return:    0  means packet same
>    *            > 0 || < 0 means packet different
>    */
> -static int colo_packet_compare(Packet *ppkt, Packet *spkt)
> +static int colo_packet_compare_common(Packet *ppkt, Packet *spkt)
>   {
>       trace_colo_compare_ip_info(ppkt->size, inet_ntoa(ppkt->ip->ip_src),
>                                  inet_ntoa(ppkt->ip->ip_dst), spkt->size,
> @@ -190,6 +190,7 @@ static int colo_packet_compare(Packet *ppkt, Packet *spkt)
>       if (ppkt->size == spkt->size) {
>           return memcmp(ppkt->data, spkt->data, spkt->size);
>       } else {
> +        trace_colo_compare_main("Net packet size are not the same");
>           return -1;
>       }
>   }
> @@ -202,9 +203,10 @@ static int colo_packet_compare(Packet *ppkt, Packet *spkt)
>   static int colo_packet_compare_tcp(Packet *spkt, Packet *ppkt)
>   {
>       struct tcphdr *ptcp, *stcp;
> -    int res;
> +    int res, network_length;
>   
>       trace_colo_compare_main("compare tcp");
> +
>       if (ppkt->size != spkt->size) {
>           if (trace_event_get_state(TRACE_COLO_COMPARE_MISCOMPARE)) {
>               trace_colo_compare_main("pkt size not same");
> @@ -212,6 +214,12 @@ static int colo_packet_compare_tcp(Packet *spkt, Packet *ppkt)
>           return -1;
>       }
>   
> +    network_length = ppkt->ip->ip_hl * 4;
> +    if (ppkt->size < network_length + ETH_HLEN) {
> +        trace_colo_compare_main("tcp packet size error");
> +        return -1;
> +    }
> +
>       ptcp = (struct tcphdr *)ppkt->transport_header;
>       stcp = (struct tcphdr *)spkt->transport_header;
>   
> @@ -260,10 +268,16 @@ static int colo_packet_compare_tcp(Packet *spkt, Packet *ppkt)
>    */
>   static int colo_packet_compare_udp(Packet *spkt, Packet *ppkt)
>   {
> -    int ret;
> +    int ret, network_length;
>   
>       trace_colo_compare_main("compare udp");
> -    ret = colo_packet_compare(ppkt, spkt);
> +    network_length = ppkt->ip->ip_hl * 4;
> +    if (ppkt->size < network_length + ETH_HLEN) {
> +        trace_colo_compare_main("udp packet size error");
> +        return -1;
> +    }
> +
> +    ret = colo_packet_compare_common(ppkt, spkt);
>   
>       if (ret) {
>           trace_colo_compare_udp_miscompare("primary pkt size", ppkt->size);
> @@ -285,12 +299,12 @@ static int colo_packet_compare_icmp(Packet *spkt, Packet *ppkt)
>   
>       trace_colo_compare_main("compare icmp");
>       network_length = ppkt->ip->ip_hl * 4;
> -    if (ppkt->size != spkt->size ||
> -        ppkt->size < network_length + ETH_HLEN) {
> +    if (ppkt->size < network_length + ETH_HLEN) {
> +        trace_colo_compare_main("icmp packet size error");
>           return -1;
>       }
>   
> -    if (colo_packet_compare(ppkt, spkt)) {
> +    if (colo_packet_compare_common(ppkt, spkt)) {
>           trace_colo_compare_icmp_miscompare("primary pkt size",
>                                              ppkt->size);
>           qemu_hexdump((char *)ppkt->data, stderr, "colo-compare",
> @@ -316,7 +330,7 @@ static int colo_packet_compare_other(Packet *spkt, Packet *ppkt)
>                                  inet_ntoa(ppkt->ip->ip_dst), spkt->size,
>                                  inet_ntoa(spkt->ip->ip_src),
>                                  inet_ntoa(spkt->ip->ip_dst));
> -    return colo_packet_compare(ppkt, spkt);
> +    return colo_packet_compare_common(ppkt, spkt);
>   }
>   
>   static int colo_old_packet_check_one(Packet *pkt, int64_t *check_time)

On 2017年02月25日 11:43, Zhang Chen wrote:
> Sorry, This patch has been renamed.
>
> please ignore this patch.
>
>
> Thanks
>
> Zhang Chen 

Want to repost to just withdraw this series (patch 2 does not apply)?

Thanks

On 02/28/2017 11:22 AM, Jason Wang wrote:
>
>
> On 2017年02月25日 11:43, Zhang Chen wrote:
>> Sorry, This patch has been renamed.
>>
>> please ignore this patch.
>>
>>
>> Thanks
>>
>> Zhang Chen 
>
> Want to repost to just withdraw this series (patch 2 does not apply)?
>

I have repost this patch, and will send V2 about this series later.
[Qemu-devel] [PATCH 1/3] COLO-compare: Add minimum packet size check and 
some fix

Thanks
Zhang Chen

> Thanks
>
>
>