-----Original Messages-----
From: "Dmitry Popov" <redacted>
Sent Time: Wednesday, July 30, 2014
To: "Zhouyi Zhou" <redacted>
Cc: rdunlap@infradead.org, davem@davemloft.net, minipli@googlemail.com, brouer@redhat.com, steffen.klassert@secunet.com, fan.du@windriver.com, dborkman@redhat.com, fengguang.wu@intel.com, tgraf@suug.ch, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, "Zhouyi Zhou" <redacted>
Subject: Re: [PATCH net-next] pktgen: add ttl option for pktgen

On Wed, 30 Jul 2014 16:21:26 +0800
Zhouyi Zhou [off-list ref] wrote:

quoted

I think it is useful to add ttl option for pktgen, for example
if a some ISP want to test its network quality, it could set 
ttl so that the tested links get the packet while end users won't
get it. 

It seems you're missing 

--- a/net/core/pktgen.c
+++ b/net/core/pktgen.c

@@ -2799,7 +2799,7 @@ static struct sk_buff *fill_packet_ipv4(struct net_device *odev,

    iph->ihl = 5;
    iph->version = 4;
-   iph->ttl = 32;
+   iph->ttl = pkt_dev->ttl;
    iph->tos = pkt_dev->tos;
    iph->protocol = IPPROTO_UDP;    /* UDP */
    iph->saddr = pkt_dev->cur_saddr;