HI Mr.Choi
Please suggest if this could be one approach to fix the issue.
*IOT-191 (*https://jira.iotivity.org/browse/IOT-191*)*
1) if the socket is IPv6, do:
int v = 1;
setsockopt(fd, IPPROTO_IPV6, IPV6_RECVPKTINFO, &v, sizeof(v))
2) if the socket is IPv4, do:
int v = 1;
#ifdef IP_PKTINFO
// Linux, OS X, Windows, NetBSD, Solaris
setsockopt(fd, IPPROTO_IP, IP_PKTINFO, &v, sizeof(v));
#elif defined(IP_RECVDSTADDR)
// FreeBSD, OpenBSD, DragonflyBSD
setsockopt(fd, IPPROTO_IP, IP_RECVDSTADDR, &v, sizeof(v));
setsockopt(fd, IPPROTO_IP, IP_RECVIF, &v, sizeof(v));
#endif
3) convert all the recvfrom calls into recvmsg [*]
4) allocate enough buffer space to receive ancillary data consisting of
either
an in6_pktinfo, an in_pktinfo or, for the three BSDs that don't support
IP_PKTINFO, an in_addr and a struct sockaddr_dl.
5) decode the ancillary data as appropriate
6) Currently this is the signature for request handler
/** Message handler for requests that is used as call-back in
coap_context_t */
typedef void (*coap_request_handler_t)(struct coap_context_t *,
const coap_queue_t * rcvd);
We should add below value to *coap_queue_t*
Bool multicast_port; // its TRUE if the packet is received in multicast
port.
7) When in *HandleCoAPRequests* we will see that multicast_port is TRUE
and the packet is UNICAST then we can ignore the request.
8) It will be processed only when multicast_port is TRUE and
the packet received also is MULTICAST.
*Regards*
*Chandan swarup Patra*
*chandan.sp at samsung.com <chandan.sp at samsung.com>*
On Thu, Apr 2, 2015 at 10:16 PM, Thiago Macieira <thiago.macieira at intel.com>
wrote:
> On Thursday 02 April 2015 21:22:18 Chandan wrote:
> > 6) Currently this is the signature for request handler
> > /** Message handler for requests that is used as call-back in
> > coap_context_t */
> > typedef void (*coap_request_handler_t)(struct coap_context_t *,
> > const coap_queue_t * rcvd);
> > We should add below value to *coap_queue_t*
> > Bool multicast_port; // its TRUE if the packet is received in multicast
> > port.
> >
> > 7) When in *HandleCoAPRequests* we will see that multicast_port is TRUE
> > and the packet is UNICAST then we can ignore the request.
> >
> > 8) It will be processed only when multicast_port is TRUE and
> > the packet received also is MULTICAST.
> >
> > *Please let me know your view on this*
>
> Hi Chandan
>
> I am not familiar with the internal API to comment on this.
>
> Maybe someone else can. Erich, Pat, Uze?
> --
> Thiago Macieira - thiago.macieira (AT) intel.com
> Software Architect - Intel Open Source Technology Center
>
>
--
Regards,
Chandan
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