On 13 March 2017 at 00:32, <[email protected]> wrote:
> From: Numan Siddique <[email protected]>
>
> OVN implements native DNS resolution which can be used to resolve the
> internal DNS names belonging to a logical datapath.
>
> To support this, the logical ports should be configured with the
> hostname in the 'Logical_Switch_Port.options:hostname' and an optional
> fqdn in 'Logical_Switch_Port.options:fqdn'.
>
> For each logical datapath with atleast one of its logical port
> configured with hostname in the options field, following flows are
> added
> - A logical flow in DNS_LKUP stage which uses the action 'dns_lookup'
> which transforms the DNS query to DNS reply packet and advances
> to the next stage - DNS_RESPONSE.
>
> - A logical flow in DNS_RESPONSE stage which implements the DNS responder
> by sending the DNS reply from previous stage back to the inport.
>
> Signed-off-by: Numan Siddique <[email protected]>
>
Would this work if there is a logical router connecting 2 switches and the
logical ports try to communicate across the router?
I had a use case, where in I wanted to give a DNS name to a VIP of a OVN
load-balancer. And that would not work with this model.
What if we have a DNS table in NB and then link it to the logical switches?
Each record in the table is a map of hostname:IP. And then we can have a
column in logical switch for DNS that links to the DNS table? Something
similar to the way we add load-balancers to logical switches.
> ---
> ovn/northd/ovn-northd.8.xml | 88 +++++++++++-
> ovn/northd/ovn-northd.c | 181 ++++++++++++++++++++++-
> ovn/ovn-nb.xml | 18 ++-
> tests/ovn.at | 340 ++++++++++++++++++++++++++++++
> ++++++++++++++
> 4 files changed, 618 insertions(+), 9 deletions(-)
>
> diff --git a/ovn/northd/ovn-northd.8.xml b/ovn/northd/ovn-northd.8.xml
> index ab8fd88..a3fe2a8 100644
> --- a/ovn/northd/ovn-northd.8.xml
> +++ b/ovn/northd/ovn-northd.8.xml
> @@ -724,7 +724,73 @@ output;
> </li>
> </ul>
>
> - <h3>Ingress Table 13 Destination Lookup</h3>
> + <h3>Ingress Table 13 DNS Lookup</h3>
> +
> + <p>
> + This table looks up and resolves the DNS names of the logical ports
> + if configured with the host names.
> + </p>
> +
> + <ul>
> + <li>
> + <p>
> + A priority-100 logical flow for each logical switch data path
> + if at least one of its logical port is configured with
> + <code>hostname</code> which matches the IPv4 and IPv6 packets
> with
> + <code>udp.src</code> = 53 and applies the action
> + <code>dns_lkup</code> and advances the packet to the next table.
> + </p>
> +
> + <pre>
> +reg0[4] = dns_lkup(); next;
> + </pre>
> +
> + <p>
> + For valid DNS packets, this transforms the packet into a DNS
> + reply if the DNS name can be resolved, and stores 1 into
> reg0[4].
> + For failed DNS resolution or other kinds of packets, it just
> stores
> + 0 into reg0[4]. Either way, it continues to the next table.
> + </p>
> + </li>
> + </ul>
> +
> + <h3>Ingress Table 14 DNS Responses</h3>
> +
> + <p>
> + This table implements DNS responder for the DNS replies generated by
> + the previous table.
> + </p>
> +
> + <ul>
> + <li>
> + <p>
> + A priority-100 logical flow for each logical switch data path
> + if at least one of its logical port is configured with
> + <code>hostname</code> which matches IPv4 and IPv6 packets with
> + <code>udp.src == 53 && reg0[4] == 1</code> and responds
> + back to the <code>inport</code> after applying these
> + actions. If <code>reg0[4]</code> is set to 1, it means that the
> + action <code>dns_lkup</code> was successful.
> + </p>
> +
> + <pre>
> +eth.dst <-> eth.src;
> +ip4.src <-> ip4.dst;
> +udp.dst = udp.src;
> +udp.src = 53;
> +outport = <var>P</var>;
> +flags.loopback = 1;
> +output;
> + </pre>
> +
> + <p>
> + (This terminates ingress packet processing; the packet does not
> go
> + to the next ingress table.)
> + </p>
> + </li>
> + </ul>
> +
> + <h3>Ingress Table 15 Destination Lookup</h3>
>
> <p>
> This table implements switching behavior. It contains these logical
> @@ -834,11 +900,23 @@ output;
> </p>
>
> <p>
> - Also a priority 34000 logical flow is added for each logical port
> which
> - has DHCPv4 options defined to allow the DHCPv4 reply packet and
> which has
> - DHCPv6 options defined to allow the DHCPv6 reply packet from the
> - <code>Ingress Table 12: DHCP responses</code>.
> + Also the following flows are added.
> </p>
> + <ul>
> + <li>
> + A Priority 34000 logical flow is added for each logical port which
> + has DHCPv4 options defined to allow the DHCPv4 reply packet and
> which has
> + DHCPv6 options defined to allow the DHCPv6 reply packet from the
> + <code>Ingress Table 12: DHCP responses</code>.
> + </li>
> +
> + <li>
> + A Priority 34000 logical flow for each logical switch data path
> if at
> + least one of its logical port is configured with hostname
> + which allows the DNS reply packet from the
> + <code>Ingress Table 14:DNS responses</code>.
> + </li>
> + </ul>
>
> <h3>Egress Table 7: Egress Port Security - IP</h3>
>
> diff --git a/ovn/northd/ovn-northd.c b/ovn/northd/ovn-northd.c
> index cc9b934..8fa42fc 100644
> --- a/ovn/northd/ovn-northd.c
> +++ b/ovn/northd/ovn-northd.c
> @@ -112,7 +112,9 @@ enum ovn_stage {
> PIPELINE_STAGE(SWITCH, IN, ARP_ND_RSP, 10, "ls_in_arp_rsp")
> \
> PIPELINE_STAGE(SWITCH, IN, DHCP_OPTIONS, 11, "ls_in_dhcp_options")
> \
> PIPELINE_STAGE(SWITCH, IN, DHCP_RESPONSE, 12, "ls_in_dhcp_response")
> \
> - PIPELINE_STAGE(SWITCH, IN, L2_LKUP, 13, "ls_in_l2_lkup")
> \
> + PIPELINE_STAGE(SWITCH, IN, DNS_LOOKUP, 13, "ls_in_dns_lookup") \
> + PIPELINE_STAGE(SWITCH, IN, DNS_RESPONSE, 14, "ls_in_dns_response") \
> + PIPELINE_STAGE(SWITCH, IN, L2_LKUP, 15, "ls_in_l2_lkup")
> \
> \
> /* Logical switch egress stages. */ \
> PIPELINE_STAGE(SWITCH, OUT, PRE_LB, 0, "ls_out_pre_lb") \
> @@ -160,6 +162,7 @@ enum ovn_stage {
> #define REGBIT_CONNTRACK_COMMIT "reg0[1]"
> #define REGBIT_CONNTRACK_NAT "reg0[2]"
> #define REGBIT_DHCP_OPTS_RESULT "reg0[3]"
> +#define REGBIT_DNS_LOOKUP_RESULT "reg0[4]"
>
> /* Register definitions for switches and routers. */
> #define REGBIT_NAT_REDIRECT "reg9[0]"
> @@ -2817,7 +2820,13 @@ build_acls(struct ovn_datapath *od, struct hmap
> *lflows)
> }
>
> /* Add 34000 priority flow to allow DHCP reply from ovn-controller to
> all
> - * logical ports of the datapath if the CMS has configured DHCPv4
> options*/
> + * logical ports of the datapath if the CMS has configured DHCPv4
> options.
> + *
> + * Add one 34000 priority flow to allow DNS reply from ovn-controller
> to all
> + * logical ports of the datapath if the CMS has configured DNS
> parameters
> + * for atleast one logical port.
> + * */
> + bool dns_flow_added = false;
> for (size_t i = 0; i < od->nbs->n_ports; i++) {
> if (od->nbs->ports[i]->dhcpv4_options) {
> const char *server_id = smap_get(
> @@ -2869,6 +2878,16 @@ build_acls(struct ovn_datapath *od, struct hmap
> *lflows)
> ds_destroy(&match);
> }
> }
> +
> + if (!dns_flow_added && smap_get(&od->nbs->ports[i]->options,
> + "hostname")) {
> + const char *actions = has_stateful ? "ct_commit; next;" :
> + "next;";
> + ovn_lflow_add(
> + lflows, od, S_SWITCH_OUT_ACL, 34000, "udp && udp.src ==
> 53",
> + actions);
> + dns_flow_added = true;
> + }
> }
> }
>
> @@ -3307,8 +3326,51 @@ build_lswitch_flows(struct hmap *datapaths, struct
> hmap *ports,
> }
> }
>
> + HMAP_FOR_EACH (od, key_node, datapaths) {
> + if (!od->nbs) {
> + continue;
> + }
> +
> + for (size_t i = 0; i < od->nbs->n_ports; i++) {
> + const struct nbrec_logical_switch_port *nbsp =
> + od->nbs->ports[i];
> +
> + if (!nbsp || !od->sb || !smap_get( ->options,
> "hostname")) {
> + continue;
> + }
> +
> + struct ds match;
> + struct ds action;
> + ds_init(&match);
> + ds_init(&action);
> + ds_put_cstr(&match, "ip && udp.dst == 53");
> + ds_put_format(&action,
> + REGBIT_DNS_LOOKUP_RESULT" = dns_lookup();
> next;");
> + ovn_lflow_add(lflows, od, S_SWITCH_IN_DNS_LOOKUP, 100,
> + ds_cstr(&match), ds_cstr(&action));
> + ds_clear(&action);
> + ds_put_cstr(&match, " && "REGBIT_DNS_LOOKUP_RESULT);
> + ds_put_format(&action, "eth.dst <-> eth.src; ip4.src <->
> ip4.dst; "
> + "udp.dst = udp.src; udp.src = 53; outport =
> inport; "
> + "flags.loopback = 1; output;");
> + ovn_lflow_add(lflows, od, S_SWITCH_IN_DNS_RESPONSE, 100,
> + ds_cstr(&match), ds_cstr(&action));
> + ds_clear(&action);
> + ds_put_format(&action, "eth.dst <-> eth.src; ip6.src <->
> ip6.dst; "
> + "udp.dst = udp.src; udp.src = 53; outport =
> inport; "
> + "flags.loopback = 1; output;");
> + ovn_lflow_add(lflows, od, S_SWITCH_IN_DNS_RESPONSE, 100,
> + ds_cstr(&match), ds_cstr(&action));
> + ds_destroy(&match);
> + ds_destroy(&action);
> + break;
> + }
> + }
> +
> /* Ingress table 11 and 12: DHCP options and response, by default
> goto next.
> - * (priority 0). */
> + * (priority 0).
> + * Ingress table 13 and 14: DNS lookup and response, by default goto
> next.
> + * (priority 0).*/
>
> HMAP_FOR_EACH (od, key_node, datapaths) {
> if (!od->nbs) {
> @@ -3317,6 +3379,8 @@ build_lswitch_flows(struct hmap *datapaths, struct
> hmap *ports,
>
> ovn_lflow_add(lflows, od, S_SWITCH_IN_DHCP_OPTIONS, 0, "1",
> "next;");
> ovn_lflow_add(lflows, od, S_SWITCH_IN_DHCP_RESPONSE, 0, "1",
> "next;");
> + ovn_lflow_add(lflows, od, S_SWITCH_IN_DNS_LOOKUP, 0, "1",
> "next;");
> + ovn_lflow_add(lflows, od, S_SWITCH_IN_DNS_RESPONSE, 0, "1",
> "next;");
> }
>
> /* Ingress table 13: Destination lookup, broadcast and multicast
> handling
> @@ -5246,6 +5310,112 @@ sync_address_sets(struct northd_context *ctx)
> }
> shash_destroy(&sb_address_sets);
> }
> +
> +static void
> +sync_dns_entries(struct northd_context *ctx, struct hmap *ports)
> +{
> + struct dns_info {
> + struct hmap_node hmap_node;
> + const struct sbrec_datapath_binding *sb;
> + const char *hostname;
> + char **ip_addresses;
> + size_t n_ip_addresses;
> + };
> +
> + struct hmap dns_map = HMAP_INITIALIZER(&dns_map);
> + struct ovn_port *op;
> +
> + HMAP_FOR_EACH (op, key_node, ports) {
> + if (!op->nbsp || !op->sb || !lsp_is_enabled(op->nbsp) ||
> op->nbrp) {
> + continue;
> + }
> +
> + const char *hostname = smap_get(&op->nbsp->options, "hostname");
> + if (!hostname) {
> + continue;
> + }
> +
> + struct dns_info *dns_info = xzalloc(sizeof *dns_info);
> + dns_info->sb = op->sb->datapath;
> + dns_info->hostname = hostname;
> + for (unsigned int i = 0; i < op->n_lsp_addrs; i++) {
> + for (size_t j = 0; j < op->lsp_addrs[i].n_ipv4_addrs; j++) {
> + dns_info->ip_addresses = xrealloc(
> + dns_info->ip_addresses,
> + sizeof *dns_info->ip_addresses * (
> + dns_info->n_ip_addresses + 1));
> + dns_info->ip_addresses[dns_info->n_ip_addresses++] =
> + op->lsp_addrs[i].ipv4_addrs[j].addr_s;
> + }
> +
> + for (size_t j = 0; j < op->lsp_addrs[i].n_ipv6_addrs; j++) {
> + dns_info->ip_addresses = xrealloc(
> + dns_info->ip_addresses,
> + sizeof *dns_info->ip_addresses * (
> + dns_info->n_ip_addresses + 1));
> + dns_info->ip_addresses[dns_info->n_ip_addresses++] =
> + op->lsp_addrs[i].ipv6_addrs[j].addr_s;
> + }
> + }
> + size_t hash = uuid_hash(&dns_info->sb->header_.uuid);
> + hash = hash_string(dns_info->hostname, hash);
> + hmap_insert(&dns_map, &dns_info->hmap_node, hash);
> + }
> +
> + const struct sbrec_dns *sbrec_dns, *next;
> + SBREC_DNS_FOR_EACH_SAFE(sbrec_dns, next, ctx->ovnsb_idl) {
> + size_t hash = uuid_hash(&sbrec_dns->datapath->header_.uuid);
> + hash = hash_string(sbrec_dns->hostname, hash);
> + bool delete_dns_record = true;
> + struct dns_info *dns_info;
> + HMAP_FOR_EACH_WITH_HASH(dns_info, hmap_node, hash, &dns_map) {
> + if (!strcmp(dns_info->hostname, sbrec_dns->hostname)) {
> + /* Verify that the IP addresses are same before removing
> from
> + * the hmap. */
> + if (dns_info->n_ip_addresses !=
> sbrec_dns->n_ip_addresses) {
> + continue;
> + }
> +
> + delete_dns_record = false;
> + for (size_t i = 0; i < sbrec_dns->n_ip_addresses; i++) {
> + if (strcmp(dns_info->ip_addresses[i],
> + sbrec_dns->ip_addresses[i])) {
> + delete_dns_record = true;
> + break;
> + }
> + }
> +
> + if (delete_dns_record) {
> + continue;
> + }
> +
> + hmap_remove(&dns_map, &dns_info->hmap_node);
> + free(dns_info->ip_addresses);
> + free(dns_info);
> + delete_dns_record = false;
> + break;
> + }
> + }
> +
> + if (delete_dns_record) {
> + sbrec_dns_delete(sbrec_dns);
> + }
> + }
> +
> + struct dns_info *dns_info;
> + HMAP_FOR_EACH_POP(dns_info, hmap_node, &dns_map) {
> + struct sbrec_dns *sbrec_dns = sbrec_dns_insert(ctx->ovnsb_txn);
> + sbrec_dns_set_datapath(sbrec_dns, dns_info->sb);
> + sbrec_dns_set_hostname(sbrec_dns, dns_info->hostname);
> + sbrec_dns_set_ip_addresses(
> + sbrec_dns, (const char **) dns_info->ip_addresses,
> + dns_info->n_ip_addresses);
> + free(dns_info->ip_addresses);
> + free(dns_info);
> + }
> + hmap_destroy(&dns_map);
> +}
> +
>
> static void
> ovnnb_db_run(struct northd_context *ctx, struct ovsdb_idl_loop *sb_loop)
> @@ -5260,6 +5430,7 @@ ovnnb_db_run(struct northd_context *ctx, struct
> ovsdb_idl_loop *sb_loop)
> build_lflows(ctx, &datapaths, &ports);
>
> sync_address_sets(ctx);
> + sync_dns_entries(ctx, &ports);
>
> struct ovn_datapath *dp, *next_dp;
> HMAP_FOR_EACH_SAFE (dp, next_dp, key_node, &datapaths) {
> @@ -5657,6 +5828,10 @@ main(int argc, char *argv[])
> add_column_noalert(ovnsb_idl_loop.idl, &sbrec_address_set_col_name);
> add_column_noalert(ovnsb_idl_loop.idl, &sbrec_address_set_col_
> addresses);
>
> + ovsdb_idl_add_table(ovnsb_idl_loop.idl, &sbrec_table_dns);
> + add_column_noalert(ovnsb_idl_loop.idl, &sbrec_dns_col_datapath);
> + add_column_noalert(ovnsb_idl_loop.idl, &sbrec_dns_col_hostname);
> +
> ovsdb_idl_add_table(ovnsb_idl_loop.idl, &sbrec_table_chassis);
> ovsdb_idl_add_column(ovnsb_idl_loop.idl, &sbrec_chassis_col_nb_cfg);
>
> diff --git a/ovn/ovn-nb.xml b/ovn/ovn-nb.xml
> index 88a6082..ccc978d 100644
> --- a/ovn/ovn-nb.xml
> +++ b/ovn/ovn-nb.xml
> @@ -344,6 +344,23 @@
> If set, indicates the maximum burst size for data sent from this
> interface, in bits.
> </column>
> +
> + <column name="options" key="hostname">
> + If set, indicates the hostname associated with the logical port.
> + <code>OVN</code> supports a simple native internal DNS
> + resolution. Any DNS query for this host name from the VIFs
> belonging
> + to the same logical network would be resolved by
> + <code>OVN</code> to the IP addresses defined in the
> + <ref column="addresses"/> field. If no match is found, the DNS
> query
> + request is expected to be handled by an external DNS resolver.
> + </column>
> +
> + <column name="options" key="fqdn">
> + If set, indicates the fqdn associated with the logical port.
> + Any DNS query for this fqdn would be resolved by
> + <code>ovn-controller</code> to the IP addresses defined in the
> + <ref column="addresses"/> field.
> + </column>
> </group>
> </group>
>
> @@ -1926,5 +1943,4 @@
> <column name="external_ids"/>
> </group>
> </table>
> -
> </database>
> diff --git a/tests/ovn.at b/tests/ovn.at
> index 4b4beb0..f5f6885 100644
> --- a/tests/ovn.at
> +++ b/tests/ovn.at
> @@ -6334,6 +6334,346 @@ OVS_APP_EXIT_AND_WAIT([ovsdb-server])
>
> AT_CLEANUP
>
> +AT_SETUP([ovn -- dns lookup : 1 HV, 2 LS, 2 LSPs/LS])
> +AT_SKIP_IF([test $HAVE_PYTHON = no])
> +ovn_start
> +
> +ovn-nbctl ls-add ls1
> +
> +ovn-nbctl lsp-add ls1 ls1-lp1 \
> +-- lsp-set-addresses ls1-lp1 "f0:00:00:00:00:01 10.0.0.4 aef0::4"
> +
> +ovn-nbctl lsp-set-port-security ls1-lp1 "f0:00:00:00:00:01 10.0.0.4
> aef0::4"
> +
> +ovn-nbctl lsp-add ls1 ls1-lp2 \
> +-- lsp-set-addresses ls1-lp2 "f0:00:00:00:00:02 10.0.0.6 20.0.0.4"
> +
> +ovn-nbctl lsp-set-port-security ls1-lp2 "f0:00:00:00:00:02 10.0.0.6
> 20.0.0.4"
> +
> +ovn-nbctl lsp-set-options ls1-lp1 hostname=vm1.ovn.org
> +ovn-nbctl lsp-set-options ls1-lp2 hostname=vm2.ovn.org
> +
> +net_add n1
> +sim_add hv1
> +
> +as hv1
> +ovs-vsctl add-br br-phys
> +ovn_attach n1 br-phys 192.168.0.1
> +ovs-vsctl -- add-port br-int hv1-vif1 -- \
> + set interface hv1-vif1 external-ids:iface-id=ls1-lp1 \
> + options:tx_pcap=hv1/vif1-tx.pcap \
> + options:rxq_pcap=hv1/vif1-rx.pcap \
> + ofport-request=1
> +
> +ovs-vsctl -- add-port br-int hv1-vif2 -- \
> + set interface hv1-vif2 external-ids:iface-id=ls1-lp2 \
> + options:tx_pcap=hv1/vif2-tx.pcap \
> + options:rxq_pcap=hv1/vif2-rx.pcap \
> + ofport-request=2
> +
> +ovn_populate_arp
> +sleep 2
> +as hv1 ovs-vsctl show
> +
> +echo "*************************"
> +ovn-sbctl list DNS
> +echo "*************************"
> +
> +ip_to_hex() {
> + printf "%02x%02x%02x%02x" "$@"
> +}
> +
> +reset_pcap_file() {
> + local iface=$1
> + local pcap_file=$2
> + ovs-vsctl -- set Interface $iface options:tx_pcap=dummy-tx.pcap \
> +options:rxq_pcap=dummy-rx.pcap
> + rm -f ${pcap_file}*.pcap
> + ovs-vsctl -- set Interface $iface options:tx_pcap=${pcap_file}-tx.pcap
> \
> +options:rxq_pcap=${pcap_file}-rx.pcap
> +}
> +
> +# set_lsp_dns_params lsp_name
> +# Sets the dns_req_data and dns_resp_data
> +set_lsp_dns_params() {
> + local lsp_name=$1
> + local ttl=00000e10
> + an_count=0001
> + type=0001
> + case $lsp_name in
> + ls1-lp1)
> + # vm1.ovn.org
> + hostname=03766d31036f766e036f726700
> + # IPv4 address - 10.0.0.4
> + expected_dns_answer=${hostname}00010001${ttl}00040a000004
> + ;;
> + ls1-lp2)
> + # vm2.ovn.org
> + hostname=03766d32036f766e036f726700
> + # IPv4 address - 10.0.0.6
> + expected_dns_answer=${hostname}00010001${ttl}00040a000006
> + # IPv4 address - 20.0.0.4
> + expected_dns_answer=${expected_dns_answer}${
> hostname}00010001${ttl}000414000004
> + an_count=0002
> + ;;
> + ls1-lp1_ipv6_only)
> + # vm1.ovn.org
> + hostname=03766d31036f766e036f726700
> + # IPv6 address - aef0::4
> + type=001c
> + expected_dns_answer=${hostname}${type}0001${ttl}
> 0010aef00000000000000000000000000004
> + ;;
> + ls1-lp1_ipv4_v6)
> + # vm1.ovn.org
> + hostname=03766d31036f766e036f726700
> + type=00ff
> + an_count=0002
> + # IPv4 address - 10.0.0.4
> + # IPv6 address - aef0::4
> + expected_dns_answer=${hostname}00010001${ttl}00040a000004
> + expected_dns_answer=${expected_dns_answer}${
> hostname}001c0001${ttl}0010
> + expected_dns_answer=${expected_dns_answer}
> aef00000000000000000000000000004
> + ;;
> + ls1-lp1_invalid_type)
> + # vm1.ovn.org
> + hostname=03766d31036f766e036f726700
> + # IPv6 address - aef0::4
> + type=0002
> + ;;
> + ls1-lp1_incomplete)
> + # set type to none
> + type=''
> + esac
> + # TTL - 3600
> + local dns_req_header=010201200001000000000000
> + local dns_resp_header=010281200001${an_count}00000000
> + dns_req_data=${dns_req_header}${hostname}${type}0001
> + dns_resp_data=${dns_resp_header}${hostname}${type}0001$
> {expected_dns_answer}
> +}
> +
> +# This shell function sends a DNS request packet
> +# test_dns INPORT SRC_MAC DST_MAC SRC_IP DST_IP DNS_QUERY EXPEC
> +test_dns() {
> + local inport=$1 src_mac=$2 dst_mac=$3 src_ip=$4 dst_ip=$5 dns_reply=$6
> + local dns_query_data=$7
> + shift; shift; shift; shift; shift; shift; shift;
> + # Packet size => IPv4 header (20) + UDP header (8) +
> + # DNS data (header + query)
> + ip_len=`expr 28 + ${#dns_query_data} / 2`
> + udp_len=`expr $ip_len - 20`
> + ip_len=$(printf "%x" $ip_len)
> + udp_len=$(printf "%x" $udp_len)
> + local request=${dst_mac}${src_mac}0800450000${ip_len}0000000080110000
> + request=${request}${src_ip}${dst_ip}9234003500${udp_len}0000
> + # dns data
> + request=${request}${dns_query_data}
> +
> + if test $dns_reply != 0; then
> + local dns_reply=$1
> + ip_len=`expr 28 + ${#dns_reply} / 2`
> + udp_len=`expr $ip_len - 20`
> + ip_len=$(printf "%x" $ip_len)
> + udp_len=$(printf "%x" $udp_len)
> + local reply=${src_mac}${dst_mac}0800450000${ip_len}
> 0000000080110000
> + reply=${reply}${dst_ip}${src_ip}0035923400${udp_len}0000${
> dns_reply}
> + echo $reply >> $inport.expected
> + else
> + for outport; do
> + echo $request >> $outport.expected
> + done
> + fi
> + as hv1 ovs-appctl netdev-dummy/receive hv1-vif$inport $request
> +}
> +
> +AT_CAPTURE_FILE([ofctl_monitor0.log])
> +as hv1 ovs-ofctl monitor br-int resume --detach --no-chdir \
> +--pidfile=ovs-ofctl0.pid 2> ofctl_monitor0.log
> +
> +set_lsp_dns_params ls1-lp2
> +src_ip=`ip_to_hex 10 0 0 4`
> +dst_ip=`ip_to_hex 10 0 0 1`
> +dns_reply=1
> +test_dns 1 f00000000001 f000000000f0 $src_ip $dst_ip $dns_reply
> $dns_req_data $dns_resp_data
> +
> +# NXT_RESUMEs should be 1.
> +OVS_WAIT_UNTIL([test 1 = `cat ofctl_monitor*.log | grep -c NXT_RESUME`])
> +
> +$PYTHON "$top_srcdir/utilities/ovs-pcap.in" hv1/vif1-tx.pcap > 1.packets
> +cat 1.expected | cut -c -48 > expout
> +AT_CHECK([cat 1.packets | cut -c -48], [0], [expout])
> +# Skipping the IPv4 checksum.
> +cat 1.expected | cut -c 53- > expout
> +AT_CHECK([cat 1.packets | cut -c 53-], [0], [expout])
> +
> +reset_pcap_file hv1-vif1 hv1/vif1
> +reset_pcap_file hv1-vif2 hv1/vif2
> +rm -f 1.expected
> +rm -f 2.expected
> +
> +set_lsp_dns_params ls1-lp1
> +src_ip=`ip_to_hex 10 0 0 6`
> +dst_ip=`ip_to_hex 10 0 0 1`
> +dns_reply=1
> +test_dns 2 f00000000002 f000000000f0 $src_ip $dst_ip $dns_reply
> $dns_req_data $dns_resp_data
> +
> +# NXT_RESUMEs should be 2.
> +OVS_WAIT_UNTIL([test 2 = `cat ofctl_monitor*.log | grep -c NXT_RESUME`])
> +
> +$PYTHON "$top_srcdir/utilities/ovs-pcap.in" hv1/vif2-tx.pcap > 2.packets
> +cat 2.expected | cut -c -48 > expout
> +AT_CHECK([cat 2.packets | cut -c -48], [0], [expout])
> +# Skipping the IPv4 checksum.
> +cat 2.expected | cut -c 53- > expout
> +AT_CHECK([cat 2.packets | cut -c 53-], [0], [expout])
> +
> +reset_pcap_file hv1-vif1 hv1/vif1
> +reset_pcap_file hv1-vif2 hv1/vif2
> +rm -f 1.expected
> +rm -f 2.expected
> +
> +# Clear the hostname options for ls1-lp2
> +ovn-nbctl lsp-set-options ls1-lp2
> +
> +set_lsp_dns_params ls1-lp2
> +src_ip=`ip_to_hex 10 0 0 4`
> +dst_ip=`ip_to_hex 10 0 0 1`
> +dns_reply=0
> +test_dns 1 f00000000001 f00000000002 $src_ip $dst_ip $dns_reply
> $dns_req_data
> +
> +# NXT_RESUMEs should be 3.
> +OVS_WAIT_UNTIL([test 3 = `cat ofctl_monitor*.log | grep -c NXT_RESUME`])
> +
> +$PYTHON "$top_srcdir/utilities/ovs-pcap.in" hv1/vif1-tx.pcap > 1.packets
> +AT_CHECK([cat 1.packets], [0], [])
> +
> +reset_pcap_file hv1-vif1 hv1/vif1
> +reset_pcap_file hv1-vif2 hv1/vif2
> +rm -f 1.expected
> +rm -f 2.expected
> +
> +# Clear the hostname for ls1-lp1
> +# Since no ports of ls1 has hostname configued,
> +# ovn-northd should not add the DNS flows.
> +ovn-nbctl lsp-set-options ls1-lp1
> +set_lsp_dns_params ls1-lp1
> +src_ip=`ip_to_hex 10 0 0 6`
> +dst_ip=`ip_to_hex 10 0 0 1`
> +dns_reply=0
> +test_dns 2 f00000000002 f000000000f0 $src_ip $dst_ip $dns_reply
> $dns_req_data
> +
> +# NXT_RESUMEs should be 3 only.
> +OVS_WAIT_UNTIL([test 3 = `cat ofctl_monitor*.log | grep -c NXT_RESUME`])
> +
> +$PYTHON "$top_srcdir/utilities/ovs-pcap.in" hv1/vif2-tx.pcap > 2.packets
> +AT_CHECK([cat 2.packets], [0], [])
> +
> +reset_pcap_file hv1-vif1 hv1/vif1
> +reset_pcap_file hv1-vif2 hv1/vif2
> +rm -f 1.expected
> +rm -f 2.expected
> +
> +# Test IPv6 (AAAA records) using IPv4 packet.
> +# Add back the DNS options for ls1-lp1.
> +ovn-nbctl lsp-set-options ls1-lp1 hostname=vm1.ovn.org
> +
> +set_lsp_dns_params ls1-lp1_ipv6_only
> +src_ip=`ip_to_hex 10 0 0 6`
> +dst_ip=`ip_to_hex 10 0 0 1`
> +dns_reply=1
> +test_dns 2 f00000000002 f000000000f0 $src_ip $dst_ip $dns_reply
> $dns_req_data $dns_resp_data
> +
> +# NXT_RESUMEs should be 4.
> +OVS_WAIT_UNTIL([test 4 = `cat ofctl_monitor*.log | grep -c NXT_RESUME`])
> +
> +$PYTHON "$top_srcdir/utilities/ovs-pcap.in" hv1/vif2-tx.pcap > 2.packets
> +cat 2.expected | cut -c -48 > expout
> +AT_CHECK([cat 2.packets | cut -c -48], [0], [expout])
> +# Skipping the IPv4 checksum.
> +cat 2.expected | cut -c 53- > expout
> +AT_CHECK([cat 2.packets | cut -c 53-], [0], [expout])
> +
> +reset_pcap_file hv1-vif1 hv1/vif1
> +reset_pcap_file hv1-vif2 hv1/vif2
> +rm -f 1.expected
> +rm -f 2.expected
> +
> +# Test both IPv4 (A) and IPv6 (AAAA records) using IPv4 packet.
> +set_lsp_dns_params ls1-lp1_ipv4_v6
> +src_ip=`ip_to_hex 10 0 0 6`
> +dst_ip=`ip_to_hex 10 0 0 1`
> +dns_reply=1
> +test_dns 2 f00000000002 f000000000f0 $src_ip $dst_ip $dns_reply
> $dns_req_data $dns_resp_data
> +
> +# NXT_RESUMEs should be 5.
> +OVS_WAIT_UNTIL([test 5 = `cat ofctl_monitor*.log | grep -c NXT_RESUME`])
> +
> +$PYTHON "$top_srcdir/utilities/ovs-pcap.in" hv1/vif2-tx.pcap > 2.packets
> +cat 2.expected | cut -c -48 > expout
> +AT_CHECK([cat 2.packets | cut -c -48], [0], [expout])
> +# Skipping the IPv4 checksum.
> +cat 2.expected | cut -c 53- > expout
> +AT_CHECK([cat 2.packets | cut -c 53-], [0], [expout])
> +
> +reset_pcap_file hv1-vif1 hv1/vif1
> +reset_pcap_file hv1-vif2 hv1/vif2
> +rm -f 1.expected
> +rm -f 2.expected
> +
> +# Invalid type.
> +set_lsp_dns_params ls1-lp1_invalid_type
> +src_ip=`ip_to_hex 10 0 0 6`
> +dst_ip=`ip_to_hex 10 0 0 1`
> +dns_reply=0
> +test_dns 2 f00000000002 f000000000f0 $src_ip $dst_ip $dns_reply
> $dns_req_data
> +
> +# NXT_RESUMEs should be 6.
> +OVS_WAIT_UNTIL([test 6 = `cat ofctl_monitor*.log | grep -c NXT_RESUME`])
> +
> +$PYTHON "$top_srcdir/utilities/ovs-pcap.in" hv1/vif2-tx.pcap > 2.packets
> +AT_CHECK([cat 2.packets], [0], [])
> +
> +reset_pcap_file hv1-vif1 hv1/vif1
> +reset_pcap_file hv1-vif2 hv1/vif2
> +rm -f 1.expected
> +rm -f 2.expected
> +
> +# Incomplete DNS packet.
> +set_lsp_dns_params ls1-lp1_incomplete
> +src_ip=`ip_to_hex 10 0 0 6`
> +dst_ip=`ip_to_hex 10 0 0 1`
> +dns_reply=0
> +test_dns 2 f00000000002 f000000000f0 $src_ip $dst_ip $dns_reply
> $dns_req_data
> +
> +# NXT_RESUMEs should be 7.
> +OVS_WAIT_UNTIL([test 7 = `cat ofctl_monitor*.log | grep -c NXT_RESUME`])
> +
> +$PYTHON "$top_srcdir/utilities/ovs-pcap.in" hv1/vif2-tx.pcap > 2.packets
> +AT_CHECK([cat 2.packets], [0], [])
> +
> +reset_pcap_file hv1-vif1 hv1/vif1
> +reset_pcap_file hv1-vif2 hv1/vif2
> +rm -f 1.expected
> +rm -f 2.expected
> +
> +as hv1
> +OVS_APP_EXIT_AND_WAIT([ovn-controller])
> +OVS_APP_EXIT_AND_WAIT([ovs-vswitchd])
> +OVS_APP_EXIT_AND_WAIT([ovsdb-server])
> +
> +as ovn-sb
> +OVS_APP_EXIT_AND_WAIT([ovsdb-server])
> +
> +as ovn-nb
> +OVS_APP_EXIT_AND_WAIT([ovsdb-server])
> +
> +as northd
> +OVS_APP_EXIT_AND_WAIT([ovn-northd])
> +
> +as main
> +OVS_APP_EXIT_AND_WAIT([ovs-vswitchd])
> +OVS_APP_EXIT_AND_WAIT([ovsdb-server])
> +AT_CLEANUP
> +
> AT_SETUP([ovn -- 1 LR with distributed router gateway port])
> AT_SKIP_IF([test $HAVE_PYTHON = no])
> ovn_start
> --
> 2.9.3
>
> _______________________________________________
> dev mailing list
> [email protected]
> https://mail.openvswitch.org/mailman/listinfo/ovs-dev
>
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