From: Shyam Shrivastav <shrivastav.shyam@gmail.com>
To: Matt Laswell <laswell@infinite.io>
Cc: Konstantinos Schoinas <ece8537@upnet.gr>, users <users@dpdk.org>
Subject: Re: [dpdk-users] SSL-Packet
Date: Wed, 1 Aug 2018 19:01:15 +0530 [thread overview]
Message-ID: <CAGSp03nt0q4EZdTC5V3d5feYo2YrJEa48c322_+0AvVtJ70cdQ@mail.gmail.com> (raw)
In-Reply-To: <CA+GnqAqL2eUyJLi5u1Jq6jdJamnr1fjQMHiBxbBvxtw4iBS2cQ@mail.gmail.com>
Assuming mbuf data includes ethernet header
struct ipv4_hdr *iphdr = rte_pktmbuf_mtod_offset(pkt,
struct ipv4_hdr *,
sizeof(struct ether_hdr));
uint32_t ihlen = (iphdr->version_ihl & 0x0f)*4;
struct tcp_hdr *th = (struct tcp_hdr *)((char *)iphdr + ihlen);
uint32_t thlen = (th->data_off & 0xf0)*4;
struct ssl_recrod *ssl = ( struct ssl_recrod *) ((char *)th + thlen);
On Wed, Aug 1, 2018 at 6:44 PM, Matt Laswell <laswell@infinite.io> wrote:
> At a minimum, you're going to want to account for options in the TCP and IP
> headers. A better way would be to do a little parsing of the IP header to
> get the header length field, then using that to find the start of the TCP
> header, etc.
>
> --
> Matt Laswell
> infinite io, inc.
>
> On Wed, Aug 1, 2018 at 5:20 AM, Konstantinos Schoinas <ece8537@upnet.gr>
> wrote:
>
> > Hello,
> >
> > Can somebody tell me how to cast a tcp packet to an ssl packet?
> >
> > I tried these lines but i dont things they are completely right.
> >
> > Struct ssl_record {
> > uint8_t type;
> > uint16_t version;
> > uint16_t length;
> > }
> >
> >
> > tcp = (struct tcp_hdr *)(ip + 1);
> > ssl = (struct ssl_record *)(tcp + 1);
> >
> >
>
prev parent reply other threads:[~2018-08-01 13:31 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-01 10:20 Konstantinos Schoinas
2018-08-01 13:14 ` Matt Laswell
2018-08-01 13:31 ` Shyam Shrivastav [this message]
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