A tcpdump of the control traffic will be useful and easier.
Regards
KK
On 21 July 2011 16:04, Ricardo Bennesby <ricardo.benne...@gmail.com> wrote:
> Hi KK. I tested as you suggested.
> ofm->match.nw_dst = htons(36677824); // I tested also ofm->match.nw_dst =
> flow.nw_dst;
> and in the action I did:
> nwaction->nw_addr = htons(new_ip);
> But it continue trying to send to IP 192.168.47.2...
> The Wireshark continues showing these:
> Ethernet II, Src: 5a:8c:01:8b:e0:fb (5a:8c:01:8b:e0:fb), Dst:
> 62:4c:de:97:90:e4 (62:4c:de:97:90:e4)
> Internet Protocol, Src: 192.168.47.1 (192.168.47.1), Dst: 192.168.47.2
> (192.168.47.2)
>
> The MAC adress is of host with IP 10.0.0.2. So the dataframes arrive in this
> host. But the destination IP continues without midifications.
> Any suggestion?
> Thank you very much.
> Best Regards.
> 2011/7/21 kk yap <yap...@stanford.edu>
>>
>> Hi Ricardo,
>>
>> Try matching on the old IP, then rewrite to the new IP.
>>
>> Regards
>> KK
>>
>> On 20 July 2011 14:50, Ricardo Bennesby <ricardo.benne...@gmail.com>
>> wrote:
>> > Hi all. I would like to forward packets from one host to another.
>> > I have the following topology:
>> > c0 c0
>> > | |
>> > s3------------- s3
>> > / \ / \
>> > h1 h2 h1 h2
>> > Each host can ping each other. The two networks are connected by their
>> > switches (s3).
>> > In net1 h1 and h2 have IP 10.0.0.1 and 10.0.0.2.
>> > In net2 h1 and h2 have IP 192.168.47.1 and 192.168.47.2
>> > I want that everytime I ping from some host in 192.168.47.2 the packets
>> > be
>> > forward to 10.0.0.2.
>> > I am using the switch.cc component and making some modifications on it.
>> > I set some actions to achieve this, using flow_mod and changing the
>> > out_port, destination mac_address and destination IP.
>> > Using wireshark, listening to the port where h2 (10.0.0.2) is, I saw
>> > that it
>> > got an ARP request from h1. So, looks like the packets arrive in the
>> > correct
>> > ethernet address, but it continue asking for 192.168.47.2. The
>> > destination
>> > IP was not modified. The code follows:
>> > if (flow.nw_dst == 36677824){//if destination ip=192.168.47.2
>> > uint8_t no_of_actions_len = 56;
>> > uint8_t action_length = no_of_actions_len/(sizeof(struct
>> > ofp_action_header));
>> > unsigned char *action_type = (unsigned
>> > char*)malloc(action_length*sizeof(struct ofp_action_header));
>> > ofp_flow_mod* ofm;
>> > size_t size = sizeof *ofm +
>> > 7*sizeof(ofp_action_output);
>> > boost::shared_array<char> raw_of(new char[size]);
>> > ofm = (ofp_flow_mod*) raw_of.get();
>> > ofm->header.version = OFP_VERSION;
>> > ofm->header.type = OFPT_FLOW_MOD;
>> > ofm->header.length = htons(size);
>> > //ofm->match.wildcards = htonl(0);
>> > ofm->match.wildcards = htonl(1<<20 | 1<<1);
>> > ofm->match.in_port = htons(flow.in_port);
>> > ofm->match.dl_vlan = flow.dl_vlan;
>> > ofm->match.dl_vlan_pcp = flow.dl_vlan_pcp;
>> > memcpy(ofm->match.dl_src, flow.dl_src.octet, sizeof
>> > ofm->match.dl_src);
>> > memcpy(ofm->match.dl_dst, new_mac.octet, sizeof
>> > ofm->match.dl_dst);
>> > ofm->match.dl_type = flow.dl_type;
>> > ofm->match.nw_src = flow.nw_src;
>> > ofm->match.nw_dst = new_ip;
>> > ofm->match.tp_src = flow.tp_src;
>> > ofm->match.tp_dst = flow.tp_dst;
>> > ofm->match.nw_proto = flow.nw_proto;
>> > ofm->match.nw_tos = flow.nw_tos;
>> > ofm->match.tp_src = flow.tp_src;
>> > ofm->cookie = htonl(0);
>> > ofm->command = htons(OFPFC_ADD);
>> > ofm->buffer_id = htonl(buffer_id);
>> > ofm->idle_timeout = htons(5);
>> > ofm->hard_timeout = htons(OFP_FLOW_PERMANENT);
>> > ofm->priority = htons(OFP_DEFAULT_PRIORITY);
>> > ofm->flags = htons(ofd_flow_mod_flags());
>> > ofp_action_dl_addr *dlaction = (ofp_action_dl_addr
>> > *)malloc(sizeof(ofp_action_dl_addr));
>> > dlaction->type = htons(OFPAT_SET_DL_DST);
>> > dlaction->len = htons(sizeof(ofp_action_dl_addr));
>> > memcpy(dlaction->dl_addr, ofm->match.dl_dst,
>> > sizeof(ofm->match.dl_dst));
>> > ofp_action_nw_tos *nw_tos = (ofp_action_nw_tos
>> > *)malloc(sizeof(ofp_action_nw_tos));
>> > nw_tos->type = htons(OFPAT_SET_NW_TOS);
>> > nw_tos->len = htons(sizeof(ofp_action_nw_tos));
>> > nw_tos->nw_tos = 0;
>> > ofp_action_tp_port *tp_src = (ofp_action_tp_port
>> > *)malloc(sizeof(ofp_action_tp_port));
>> > tp_src->type = htons(OFPAT_SET_TP_SRC);
>> > tp_src->len = htons(sizeof(ofp_action_tp_port));
>> > tp_src->tp_port = htons(0);
>> > ofp_action_tp_port *tp_dst = (ofp_action_tp_port
>> > *)malloc(sizeof(ofp_action_tp_port));
>> > tp_dst->type = htons(OFPAT_SET_TP_DST);
>> > tp_dst->len = htons(sizeof(ofp_action_tp_port));
>> > tp_dst->tp_port = htons(0);
>> > ofp_action_output *action = (ofp_action_output
>> > *)malloc(sizeof(ofp_action_output));
>> > action->type = htons(OFPAT_OUTPUT);
>> > action->len = htons(sizeof(ofp_action_output));
>> > action->port = htons(port);
>> > action->max_len = htons(0);
>> > ofp_action_nw_addr *nwaction = (ofp_action_nw_addr
>> > *)malloc(sizeof(ofp_action_nw_addr));
>> > nwaction->type = htons(OFPAT_SET_NW_DST);
>> > nwaction->len = htons(sizeof(ofp_action_nw_addr));
>> > nwaction->nw_addr = new_ip;
>> > memcpy(action_type, (unsigned char *)dlaction,
>> > sizeof(ofp_action_dl_addr));
>> > memcpy(action_type + sizeof(ofp_action_dl_addr),
>> > (unsigned
>> > char *)nw_tos, sizeof(ofp_action_nw_tos));
>> > memcpy(action_type + sizeof(ofp_action_dl_addr)+
>> > sizeof(ofp_action_nw_tos), (unsigned char *)tp_src,
>> > sizeof(ofp_action_tp_port));
>> > memcpy(action_type + sizeof(ofp_action_dl_addr) +
>> > sizeof(ofp_action_nw_tos) + sizeof(ofp_action_tp_port), (unsigned char
>> > *)tp_dst, sizeof(ofp_action_tp_port));
>> > memcpy(action_type + sizeof(ofp_action_dl_addr) +
>> > sizeof(ofp_action_nw_tos) + sizeof(ofp_action_tp_port)+
>> > sizeof(ofp_action_tp_port), (unsigned char *)action,
>> > sizeof(ofp_action_output));
>> > memcpy(action_type + sizeof(ofp_action_dl_addr) +
>> > sizeof(ofp_action_nw_tos) + sizeof(ofp_action_tp_port)+
>> > sizeof(ofp_action_tp_port)+sizeof(ofp_action_output), (unsigned char
>> > *)nwaction, sizeof(ofp_action_nw_addr));
>> > \
>> > // Copy action_type to ofm->actions
>> > memcpy(ofm->actions, action_type, no_of_actions_len);
>> > send_openflow_command(pi.datapath_id, &ofm->header,
>> > true);
>> > }
>> > Sorry if I wasn't clear.
>> > Best regards.
>> > --
>> > Ricardo Bennesby da Silva
>> > Ciência da Computação - UFAM
>> > LabCIA - Laboratório de Computação Inteligente e Autonoma
>> >
>> >
>> > _______________________________________________
>> > nox-dev mailing list
>> > nox-dev@noxrepo.org
>> > http://noxrepo.org/mailman/listinfo/nox-dev
>> >
>> >
>
>
>
> --
> Ricardo Bennesby da Silva
> Ciência da Computação - UFAM
> LabCIA - Laboratório de Computação Inteligente e Autonômica
>
>
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