[Openswan Users] udp_encap_rcv(): Unhandled UDP encap type: 1

[David Clymer]

Thus quoth Nate Carlson:
> To: users at openswan.org
> From: Nate Carlson <natecars at natecarlson.com>
> Subject: Re: [Openswan Users] udp_encap_rcv(): Unhandled UDP encap type: 1
> 
> On Thu, 16 Sep 2004, neptuno wrote:
> >How can i correct this on my system ?
> 
> We'll need more information about your setup.
> 
> Which IPSec stack are you running, on which kernel? What patches are 
> applied to the kernel?
> 

I'm seeing the same thing. I'm running Debian 3.1 (Sarge), a custom debian
2.4.26 kernel with native IPSec, and openswan 2.1.3. The only patch I've applied is for
Sangoma's latest Wanrouter drivers. I've not applied any IPSec related patches.

Hmm. Looks like I've got nat-traversal enabled in my config, though i'm
not using it. I dont know if that could have anything to do with it or
not.

Below are config options from ipsec barf:

CONFIG_NETLINK_DEV=m
CONFIG_NET_KEY=y
CONFIG_INET=y
CONFIG_IP_MULTICAST=y
CONFIG_IP_ADVANCED_ROUTER=y
CONFIG_IP_MULTIPLE_TABLES=y
CONFIG_IP_ROUTE_FWMARK=y
CONFIG_IP_ROUTE_NAT=y
CONFIG_IP_ROUTE_MULTIPATH=y
CONFIG_IP_ROUTE_TOS=y
CONFIG_IP_ROUTE_VERBOSE=y
# CONFIG_IP_PNP is not set
CONFIG_IP_MROUTE=y
CONFIG_IP_PIMSM_V1=y
CONFIG_IP_PIMSM_V2=y
CONFIG_INET_ECN=y
CONFIG_INET_AH=m
CONFIG_INET_ESP=m
CONFIG_INET_IPCOMP=m
CONFIG_IP_NF_CONNTRACK=m
CONFIG_IP_NF_FTP=m
CONFIG_IP_NF_AMANDA=m
CONFIG_IP_NF_TFTP=m
CONFIG_IP_NF_IRC=m
CONFIG_IP_NF_QUEUE=m
CONFIG_IP_NF_IPTABLES=m
CONFIG_IP_NF_MATCH_LIMIT=m
CONFIG_IP_NF_MATCH_MAC=m
CONFIG_IP_NF_MATCH_PKTTYPE=m
CONFIG_IP_NF_MATCH_MARK=m
CONFIG_IP_NF_MATCH_MULTIPORT=m
CONFIG_IP_NF_MATCH_TOS=m
CONFIG_IP_NF_MATCH_RECENT=m
CONFIG_IP_NF_MATCH_ECN=m
CONFIG_IP_NF_MATCH_DSCP=m
CONFIG_IP_NF_MATCH_AH_ESP=m
CONFIG_IP_NF_MATCH_LENGTH=m
CONFIG_IP_NF_MATCH_TTL=m
CONFIG_IP_NF_MATCH_TCPMSS=m
CONFIG_IP_NF_MATCH_HELPER=m
CONFIG_IP_NF_MATCH_STATE=m
CONFIG_IP_NF_MATCH_CONNTRACK=m
CONFIG_IP_NF_MATCH_UNCLEAN=m
CONFIG_IP_NF_MATCH_OWNER=m
CONFIG_IP_NF_FILTER=m
CONFIG_IP_NF_TARGET_REJECT=m
CONFIG_IP_NF_TARGET_MIRROR=m
CONFIG_IP_NF_NAT=m
CONFIG_IP_NF_NAT_NEEDED=y
CONFIG_IP_NF_TARGET_MASQUERADE=m
CONFIG_IP_NF_TARGET_REDIRECT=m
CONFIG_IP_NF_NAT_AMANDA=m
# CONFIG_IP_NF_NAT_LOCAL is not set
CONFIG_IP_NF_NAT_SNMP_BASIC=m
CONFIG_IP_NF_NAT_IRC=m
CONFIG_IP_NF_NAT_FTP=m
CONFIG_IP_NF_NAT_TFTP=m
CONFIG_IP_NF_MANGLE=m
CONFIG_IP_NF_TARGET_TOS=m
CONFIG_IP_NF_TARGET_ECN=m
CONFIG_IP_NF_TARGET_DSCP=m
CONFIG_IP_NF_TARGET_MARK=m
CONFIG_IP_NF_TARGET_LOG=m
CONFIG_IP_NF_TARGET_ULOG=m
CONFIG_IP_NF_TARGET_TCPMSS=m
CONFIG_IP_NF_ARPTABLES=m
CONFIG_IP_NF_ARPFILTER=m
CONFIG_IP_NF_ARP_MANGLE=m
# CONFIG_IP_NF_COMPAT_IPCHAINS is not set
# CONFIG_IP_NF_COMPAT_IPFWADM is not set
# CONFIG_IP_VS is not set
CONFIG_IPV6=m
CONFIG_IPV6_PRIVACY=y
CONFIG_IP6_NF_QUEUE=m
CONFIG_IP6_NF_IPTABLES=m
CONFIG_IP6_NF_MATCH_LIMIT=m
CONFIG_IP6_NF_MATCH_MAC=m
# CONFIG_IP6_NF_MATCH_RT is not set
# CONFIG_IP6_NF_MATCH_OPTS is not set
# CONFIG_IP6_NF_MATCH_FRAG is not set
# CONFIG_IP6_NF_MATCH_HL is not set
CONFIG_IP6_NF_MATCH_MULTIPORT=m
CONFIG_IP6_NF_MATCH_OWNER=m
CONFIG_IP6_NF_MATCH_MARK=m
CONFIG_IP6_NF_MATCH_IPV6HEADER=m
CONFIG_IP6_NF_MATCH_AHESP=m
CONFIG_IP6_NF_MATCH_LENGTH=m
CONFIG_IP6_NF_MATCH_EUI64=m
CONFIG_IP6_NF_FILTER=m
CONFIG_IP6_NF_TARGET_LOG=m
CONFIG_IP6_NF_MANGLE=m
CONFIG_IP6_NF_TARGET_MARK=m
CONFIG_INET6_AH=m
CONFIG_INET6_ESP=m
CONFIG_INET6_IPCOMP=m
CONFIG_IPV6_TUNNEL=m
# CONFIG_IP_SCTP is not set
CONFIG_IPX=m
# CONFIG_IPX_INTERN is not set
CONFIG_IPHASE5526=m
# CONFIG_IPMI_HANDLER is not set
# CONFIG_IPMI_PANIC_EVENT is not set
# CONFIG_IPMI_DEVICE_INTERFACE is not set
# CONFIG_IPMI_KCS is not set
# CONFIG_IPMI_WATCHDOG is not set


The messages occur pretty frequently, as one can see from this log excerpt:

Sep 17 06:28:45 jekyl kernel: udp_encap_rcv(): Unhandled UDP encap type: 1
Sep 17 06:36:42 jekyl kernel: udp_encap_rcv(): Unhandled UDP encap type: 1
Sep 17 06:47:16 jekyl kernel: udp_encap_rcv(): Unhandled UDP encap type: 1
Sep 17 06:48:05 jekyl kernel: udp_encap_rcv(): Unhandled UDP encap type: 1
Sep 17 07:00:58 jekyl kernel: udp_encap_rcv(): Unhandled UDP encap type: 1
Sep 17 07:03:18 jekyl kernel: udp_encap_rcv(): Unhandled UDP encap type: 1
Sep 17 07:07:19 jekyl kernel: udp_encap_rcv(): Unhandled UDP encap type: 1
Sep 17 07:14:57 jekyl kernel: udp_encap_rcv(): Unhandled UDP encap type: 1
Sep 17 07:17:42 jekyl kernel: udp_encap_rcv(): Unhandled UDP encap type: 1
Sep 17 07:21:18 jekyl kernel: udp_encap_rcv(): Unhandled UDP encap type: 1
Sep 17 07:23:03 jekyl kernel: udp_encap_rcv(): Unhandled UDP encap type: 1
Sep 17 07:24:35 jekyl kernel: udp_encap_rcv(): Unhandled UDP encap type: 1
Sep 17 07:24:35 jekyl kernel: udp_encap_rcv(): Unhandled UDP encap type: 1
Sep 17 07:27:03 jekyl kernel: udp_encap_rcv(): Unhandled UDP encap type: 1

-davidc