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Hello,
On Sat, 5 Mar 2016, Marco Angaroni wrote:
> The IPVS SIP persistence engine is not able to parse the SIP header
> "Call-ID" when such header is inserted in the first positions of
> the SIP message.
>
> When IPVS is configured with "--pe sip" option, like for example:
> ipvsadm -A -u 1.2.3.4:5060 -s rr --pe sip -p 120 -o
> some particular messages (see below for details) do not create entries
> in the connection template table, which can be listed with:
> ipvsadm -Lcn --persistent-conn
>
> Problematic SIP messages are SIP responses having "Call-ID" header
> positioned just after message first line:
> SIP/2.0 200 OK
> [Call-ID header here]
> [rest of the headers]
>
> When "Call-ID" header is positioned down (after a few other headers)
> it is correctly recognized.
>
> This is due to the data offset used in get_callid function call inside
> ip_vs_pe_sip.c file: since dptr already points to the start of the
> SIP message, the value of dataoff should be initially 0.
> Otherwise the header is searched starting from some bytes after the
> first character of the SIP message.
>
> Fixes: 758ff0338722 ("IPVS: sip persistence engine")
> Signed-off-by: Marco Angaroni <marcoangaroni@xxxxxxxxx>
Looks good to me. Simon, please apply.
Acked-by: Julian Anastasov <ja@xxxxxx>
> ---
> net/netfilter/ipvs/ip_vs_pe_sip.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/net/netfilter/ipvs/ip_vs_pe_sip.c
> b/net/netfilter/ipvs/ip_vs_pe_sip.c
> index 1b8d594..b3e0e5b 100644
> --- a/net/netfilter/ipvs/ip_vs_pe_sip.c
> +++ b/net/netfilter/ipvs/ip_vs_pe_sip.c
> @@ -88,7 +88,7 @@ ip_vs_sip_fill_param(struct ip_vs_conn_param *p, struct
> sk_buff *skb)
> dptr = skb->data + dataoff;
> datalen = skb->len - dataoff;
>
> - if (get_callid(dptr, dataoff, datalen, &matchoff, &matchlen))
> + if (get_callid(dptr, 0, datalen, &matchoff, &matchlen))
> return -EINVAL;
>
> /* N.B: pe_data is only set on success,
> --
> 1.8.3.1
Regards
--
Julian Anastasov <ja@xxxxxx>
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