Date: Thu, 9 Nov 2006 17:34:44 +0000 (UTC) From: "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net> To: Randall Stewart <rrs@cisco.com> Cc: freebsd-current@freebsd.org Subject: Re: SCTP is in the Tree :-) Message-ID: <20061109173256.G54329@maildrop.int.zabbadoz.net> In-Reply-To: <45525E52.6090608@cisco.com> References: <45524517.1060501@cisco.com> <eitijt$4r8$1@sea.gmane.org> <45525E52.6090608@cisco.com>
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On Wed, 8 Nov 2006, Randall Stewart wrote:
> Ivan Voras wrote:
>> Randall Stewart wrote:
>>
>>
>>> Stream Control Transmission Protocol (SCTP) - is a reliable message
>>> oriented transport protocol which provides network fault tolerance
>>> It supports multiple streams and multihoming. A very good overview
>>> of the protocol is given in RFC 3268.
>>
>>
>> Looks cool :)
>>
>> It's under IP so it's routable, but I imagine it probably needs routers
>> along the way to know about it in order to use the more advanced features?
>
> Nope.. not at all..
>
> The only issue is when you cross a firewall or NAT :-(
>
> Note that I have heard that the latest FreeBSD IPv6 FW for
> some reason drops SCTP packets even if you have typed in
> allow ip from any to any...
>
> Something about not liking protocol 132 in the extension
> headers :(
would that patch help you (I'd have to investigate in detail but like
some of us I am currently in Milan and I still don't know the details
of SCTP [as in I haven't read the RFC yet]):
Index: ip_fw2.c
===================================================================
RCS file: /local/mirror/FreeBSD/r/ncvs/src/sys/netinet/ip_fw2.c,v
retrieving revision 1.153
diff -u -p -r1.153 ip_fw2.c
--- ip_fw2.c 6 Nov 2006 13:42:04 -0000 1.153
+++ ip_fw2.c 9 Nov 2006 17:32:22 -0000
@@ -311,6 +311,7 @@ static int fw_deny_unknown_exthdrs = 1;
*/
#define L3HDR(T, ip) ((T *)((u_int32_t *)(ip) + (ip)->ip_hl))
#define TCP(p) ((struct tcphdr *)(p))
+#define SCTP(p) ((struct sctphdr *)(p))
#define UDP(p) ((struct udphdr *)(p))
#define ICMP(p) ((struct icmphdr *)(p))
#define ICMP6(p) ((struct icmp6_hdr *)(p))
@@ -2222,6 +2223,12 @@ do { \
args->f_id.flags = TCP(ulp)->th_flags;
break;
+ case IPPROTO_SCTP:
+ PULLUP_TO(hlen, ulp, struct sctphdr);
+ src_port = SCTP(ulp)->src_port;
+ dst_port = SCTP(ulp)->dest_port;
+ break;
+
case IPPROTO_UDP:
PULLUP_TO(hlen, ulp, struct udphdr);
dst_port = UDP(ulp)->uh_dport;
--
Bjoern A. Zeeb bzeeb at Zabbadoz dot NeT
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