OpenFlow 1.3: Recognise 3 more messages types.

diff --git a/print-openflow-1.3.c b/print-openflow-1.3.c
index 93f6383cbca88650032644747e30bc2bc6c566a2..5ea83b0232c6238c855fe91572a69c439553fb24 100644 (file)
--- a/print-openflow-1.3.c
+++ b/print-openflow-1.3.c
@@ -162,6 +162,17 @@ static const struct tok ofppc_bm[] = {
 #define OFPPC_U (~(OFPPC_PORT_DOWN | OFPPC_NO_RECV | OFPPC_NO_FWD | \
                    OFPPC_NO_PACKET_IN))
 
 #define OFPPC_U (~(OFPPC_PORT_DOWN | OFPPC_NO_RECV | OFPPC_NO_FWD | \
                    OFPPC_NO_PACKET_IN))
 

+#define OFPPS_LINK_DOWN   (1U << 0)
+#define OFPPS_BLOCKED     (1U << 1)
+#define OFPPS_LIVE        (1U << 2)
+static const struct tok ofpps_bm[] = {
+       { OFPPS_LINK_DOWN, "LINK_DOWN" },
+       { OFPPS_BLOCKED,   "BLOCKED"   },
+       { OFPPS_LIVE,      "LIVE"      },
+       { 0, NULL }
+};
+#define OFPPS_U (~(OFPPS_LINK_DOWN | OFPPS_BLOCKED | OFPPS_LIVE))
+

 #define OFPPF_10MB_HD    (1U <<  0)
 #define OFPPF_10MB_FD    (1U <<  1)
 #define OFPPF_100MB_HD   (1U <<  2)
 #define OFPPF_10MB_HD    (1U <<  0)
 #define OFPPF_10MB_FD    (1U <<  1)
 #define OFPPF_100MB_HD   (1U <<  2)


@@ -231,6 +242,18 @@ static const struct tok ofpp_str[] = {
        { 0, NULL }
 };
 
        { 0, NULL }
 };
 

+#define OFPCR_ROLE_NOCHANGE 0U
+#define OFPCR_ROLE_EQUAL    1U
+#define OFPCR_ROLE_MASTER   2U
+#define OFPCR_ROLE_SLAVE    3U
+static const struct tok ofpcr_str[] = {
+       { OFPCR_ROLE_NOCHANGE, "NOCHANGE" },
+       { OFPCR_ROLE_EQUAL,    "EQUAL"    },
+       { OFPCR_ROLE_MASTER,   "MASTER"   },
+       { OFPCR_ROLE_SLAVE,    "SLAVE"    },
+       { 0, NULL }
+};
+

 #define OF_BIT_VER_1_0 (1U << (OF_VER_1_0 - 1))
 #define OF_BIT_VER_1_1 (1U << (OF_VER_1_1 - 1))
 #define OF_BIT_VER_1_2 (1U << (OF_VER_1_2 - 1))
 #define OF_BIT_VER_1_0 (1U << (OF_VER_1_0 - 1))
 #define OF_BIT_VER_1_1 (1U << (OF_VER_1_1 - 1))
 #define OF_BIT_VER_1_2 (1U << (OF_VER_1_2 - 1))


@@ -249,6 +272,16 @@ static const struct tok ofverbm_str[] = {
 #define OF_BIT_VER_U (~(OF_BIT_VER_1_0 | OF_BIT_VER_1_1 | OF_BIT_VER_1_2 | \
                         OF_BIT_VER_1_3 | OF_BIT_VER_1_4 | OF_BIT_VER_1_5))
 
 #define OF_BIT_VER_U (~(OF_BIT_VER_1_0 | OF_BIT_VER_1_1 | OF_BIT_VER_1_2 | \
                         OF_BIT_VER_1_3 | OF_BIT_VER_1_4 | OF_BIT_VER_1_5))
 

+#define OFPPR_ADD    0U
+#define OFPPR_DELETE 1U
+#define OFPPR_MODIFY 2U
+static const struct tok ofppr_str[] = {
+       { OFPPR_ADD,    "ADD"    },
+       { OFPPR_DELETE, "DELETE" },
+       { OFPPR_MODIFY, "MODIFY" },
+       { 0, NULL }
+};
+

 #define OFPET_HELLO_FAILED           0U
 #define OFPET_BAD_REQUEST            1U
 #define OFPET_BAD_ACTION             2U
 #define OFPET_HELLO_FAILED           0U
 #define OFPET_BAD_REQUEST            1U
 #define OFPET_BAD_ACTION             2U


@@ -587,8 +620,13 @@ static const struct uint_tokary of13_ofpet2tokary[] = {
 #define OF_PORT_MOD_FIXLEN                    40U
 #define OF_SWITCH_CONFIG_MSG_FIXLEN           12U
 #define OF_QUEUE_GET_CONFIG_REQUEST_FIXLEN    16U
 #define OF_PORT_MOD_FIXLEN                    40U
 #define OF_SWITCH_CONFIG_MSG_FIXLEN           12U
 #define OF_QUEUE_GET_CONFIG_REQUEST_FIXLEN    16U

+#define OF_ROLE_MSG_FIXLEN                    24U
+#define OF_PORT_STATUS_FIXLEN                 80U

 #define OF_EXPERIMENTER_MSG_MINLEN            16U
 
 #define OF_EXPERIMENTER_MSG_MINLEN            16U
 

+/* miscellaneous constants from [OF13] */
+#define OFP_MAX_PORT_NAME_LEN                 16U
+

 /* [OF13] Section A.1 */
 const char *
 of13_msgtype_str(const uint8_t type)
 /* [OF13] Section A.1 */
 const char *
 of13_msgtype_str(const uint8_t type)


@@ -596,6 +634,64 @@ of13_msgtype_str(const uint8_t type)
        return tok2str(ofpt_str, "invalid (0x%02x)", type);
 }
 
        return tok2str(ofpt_str, "invalid (0x%02x)", type);
 }
 

+/* [OF13] Section 7.2.1 */
+static void
+of13_port_print(netdissect_options *ndo,
+                const u_char *cp)
+{
+       /* port_no */
+       ND_PRINT("\n\t  port_no %s",
+                tok2str(ofpp_str, "%u", GET_BE_U_4(cp)));
+       cp += 4;
+       /* pad */
+       cp += 4;
+       /* hw_addr */
+       ND_PRINT(", hw_addr %s", GET_ETHERADDR_STRING(cp));
+       cp += MAC_ADDR_LEN;
+       /* pad2 */
+       cp += 2;
+       /* name */
+       ND_PRINT(", name '");
+       (void)nd_print(ndo, cp, cp + OFP_MAX_PORT_NAME_LEN);
+       ND_PRINT("'");
+       cp += OFP_MAX_PORT_NAME_LEN;
+
+       if (ndo->ndo_vflag < 2) {
+               ND_TCHECK_LEN(cp, 32);
+               return;
+       }
+
+       /* config */
+       ND_PRINT("\n\t   config 0x%08x", GET_BE_U_4(cp));
+       of_bitmap_print(ndo, ofppc_bm, GET_BE_U_4(cp), OFPPC_U);
+       cp += 4;
+       /* state */
+       ND_PRINT("\n\t   state 0x%08x", GET_BE_U_4(cp));
+       of_bitmap_print(ndo, ofpps_bm, GET_BE_U_4(cp), OFPPS_U);;
+       cp += 4;
+       /* curr */
+       ND_PRINT("\n\t   curr 0x%08x", GET_BE_U_4(cp));
+       of_bitmap_print(ndo, ofppf_bm, GET_BE_U_4(cp), OFPPF_U);
+       cp += 4;
+       /* advertised */
+       ND_PRINT("\n\t   advertised 0x%08x", GET_BE_U_4(cp));
+       of_bitmap_print(ndo, ofppf_bm, GET_BE_U_4(cp), OFPPF_U);
+       cp += 4;
+       /* supported */
+       ND_PRINT("\n\t   supported 0x%08x", GET_BE_U_4(cp));
+       of_bitmap_print(ndo, ofppf_bm, GET_BE_U_4(cp), OFPPF_U);
+       cp += 4;
+       /* peer */
+       ND_PRINT("\n\t   peer 0x%08x", GET_BE_U_4(cp));
+       of_bitmap_print(ndo, ofppf_bm, GET_BE_U_4(cp), OFPPF_U);
+       cp += 4;
+       /* curr_speed */
+       ND_PRINT("\n\t   curr_speed %ukbps", GET_BE_U_4(cp));
+       cp += 4;
+       /* max_speed */
+       ND_PRINT("\n\t   max_speed %ukbps", GET_BE_U_4(cp));
+}
+

 /* [OF13] Section 7.3.1 */
 static void
 of13_features_reply_print(netdissect_options *ndo,
 /* [OF13] Section 7.3.1 */
 static void
 of13_features_reply_print(netdissect_options *ndo,


@@ -637,6 +733,21 @@ of13_switch_config_msg_print(netdissect_options *ndo,
                 tok2str(ofpcml_str, "%u", GET_BE_U_2(cp)));
 }
 
                 tok2str(ofpcml_str, "%u", GET_BE_U_2(cp)));
 }
 

+/* [OF13] Section 7.3.9 */
+static void
+of13_role_msg_print(netdissect_options *ndo,
+                    const u_char *cp)
+{
+       /* role */
+       ND_PRINT("\n\t role %s",
+                tok2str(ofpcr_str, "invalid (0x%08x)", GET_BE_U_4(cp)));
+       cp += 4;
+       /* pad */
+       cp += 4;
+       /* generation_id */
+       ND_PRINT(", generation_id 0x%016" PRIx64, GET_BE_U_8(cp));
+}
+

 /* [OF13] Section 7.3.4.3 */
 static void
 of13_port_mod_print(netdissect_options *ndo,
 /* [OF13] Section 7.3.4.3 */
 static void
 of13_port_mod_print(netdissect_options *ndo,


@@ -669,6 +780,21 @@ of13_port_mod_print(netdissect_options *ndo,
        ND_TCHECK_4(cp);
 }
 
        ND_TCHECK_4(cp);
 }
 

+/* [OF13] Section 7.4.3 */
+static void
+of13_port_status_print(netdissect_options *ndo,
+                       const u_char *cp)
+{
+       /* reason */
+       ND_PRINT("\n\t reason %s",
+                tok2str(ofppr_str, "invalid (0x02x)", GET_U_1(cp)));
+       cp += 1;
+       /* pad */
+       cp += 7;
+       /* desc */
+       of13_port_print(ndo, cp);
+}
+

 /* [OF13] Section 7.5.1 */
 static void
 of13_hello_elements_print(netdissect_options *ndo,
 /* [OF13] Section 7.5.1 */
 static void
 of13_hello_elements_print(netdissect_options *ndo,


@@ -819,6 +945,21 @@ of13_message_print(netdissect_options *ndo,
                        break;
                of13_port_mod_print(ndo, cp, len);
                return;
                        break;
                of13_port_mod_print(ndo, cp, len);
                return;

+       case OFPT_ROLE_REQUEST: /* [OF13] Section 7.3.9 */
+       case OFPT_ROLE_REPLY: /* ibid */
+               if (len != OF_ROLE_MSG_FIXLEN - OF_HEADER_FIXLEN)
+                       goto invalid;
+               if (ndo->ndo_vflag < 1)
+                       break;
+               of13_role_msg_print(ndo, cp);
+               return;
+       case OFPT_PORT_STATUS: /* [OF13] Section 7.4.3 */
+               if (len != OF_PORT_STATUS_FIXLEN - OF_HEADER_FIXLEN)
+                       goto invalid;
+               if (ndo->ndo_vflag < 1)
+                       break;
+               of13_port_status_print(ndo, cp);
+               return;

 
        /* OpenFlow header and variable-size data. */
        case OFPT_ECHO_REQUEST: /* [OF13] Section A.5.2 */
 
        /* OpenFlow header and variable-size data. */
        case OFPT_ECHO_REQUEST: /* [OF13] Section A.5.2 */

diff --git a/tests/of13_ericsson-v.out b/tests/of13_ericsson-v.out
index f1ed98ceb5791a6b627a00dd63fd668090312f3e..6edc90ce6dfc30769bf3b5309346b85f20320e77 100644 (file)
--- a/tests/of13_ericsson-v.out
+++ b/tests/of13_ericsson-v.out
@@ -209,6 +209,8 @@
    75  13:15:24.725748 IP (tos 0x0, ttl 64, id 51120, offset 0, flags [DF], proto TCP (6), length 132)
     127.0.0.1.38906 > 127.0.0.1.6633: Flags [P.], cksum 0xfe78 (incorrect -> 0xadc3), seq 2781543975:2781544055, ack 1865664008, win 86, options [nop,nop,TS val 1794904 ecr 1794249], length 80: OpenFlow
        version 1.3, type PORT_STATUS, length 80, xid 0x00000000
    75  13:15:24.725748 IP (tos 0x0, ttl 64, id 51120, offset 0, flags [DF], proto TCP (6), length 132)
     127.0.0.1.38906 > 127.0.0.1.6633: Flags [P.], cksum 0xfe78 (incorrect -> 0xadc3), seq 2781543975:2781544055, ack 1865664008, win 86, options [nop,nop,TS val 1794904 ecr 1794249], length 80: OpenFlow
        version 1.3, type PORT_STATUS, length 80, xid 0x00000000

+        reason ADD
+         port_no 2, hw_addr ca:02:9f:af:e9:1c, name 'veth0'

    76  13:15:24.725788 IP (tos 0x0, ttl 64, id 64306, offset 0, flags [DF], proto TCP (6), length 52)
     127.0.0.1.6633 > 127.0.0.1.38906: Flags [.], cksum 0xfe28 (incorrect -> 0x2614), ack 80, win 94, options [nop,nop,TS val 1794904 ecr 1794904], length 0
    77  16:37:49.792852 IP (tos 0x0, ttl 64, id 32480, offset 0, flags [DF], proto TCP (6), length 68)
    76  13:15:24.725788 IP (tos 0x0, ttl 64, id 64306, offset 0, flags [DF], proto TCP (6), length 52)
     127.0.0.1.6633 > 127.0.0.1.38906: Flags [.], cksum 0xfe28 (incorrect -> 0x2614), ack 80, win 94, options [nop,nop,TS val 1794904 ecr 1794904], length 0
    77  16:37:49.792852 IP (tos 0x0, ttl 64, id 32480, offset 0, flags [DF], proto TCP (6), length 68)


@@ -411,6 +413,8 @@
   150  19:53:23.473744 IP (tos 0x0, ttl 64, id 23790, offset 0, flags [DF], proto TCP (6), length 132)
     127.0.0.1.51984 > 127.0.0.1.6633: Flags [P.], cksum 0xfe78 (incorrect -> 0x92a0), seq 1361:1441, ack 976, win 86, options [nop,nop,TS val 6303167 ecr 6303167], length 80: OpenFlow
        version 1.3, type PORT_STATUS, length 80, xid 0x00000000
   150  19:53:23.473744 IP (tos 0x0, ttl 64, id 23790, offset 0, flags [DF], proto TCP (6), length 132)
     127.0.0.1.51984 > 127.0.0.1.6633: Flags [P.], cksum 0xfe78 (incorrect -> 0x92a0), seq 1361:1441, ack 976, win 86, options [nop,nop,TS val 6303167 ecr 6303167], length 80: OpenFlow
        version 1.3, type PORT_STATUS, length 80, xid 0x00000000

+        reason MODIFY
+         port_no 1, hw_addr 0a:ea:83:10:db:09, name 'veth0'

   151  19:53:23.473777 IP (tos 0x0, ttl 64, id 17918, offset 0, flags [DF], proto TCP (6), length 52)
     127.0.0.1.6633 > 127.0.0.1.51984: Flags [.], cksum 0xfe28 (incorrect -> 0x25f0), ack 1441, win 98, options [nop,nop,TS val 6303167 ecr 6303167], length 0
   152  19:55:19.511983 IP (tos 0x0, ttl 64, id 17967, offset 0, flags [DF], proto TCP (6), length 60)
   151  19:53:23.473777 IP (tos 0x0, ttl 64, id 17918, offset 0, flags [DF], proto TCP (6), length 52)
     127.0.0.1.6633 > 127.0.0.1.51984: Flags [.], cksum 0xfe28 (incorrect -> 0x25f0), ack 1441, win 98, options [nop,nop,TS val 6303167 ecr 6303167], length 0
   152  19:55:19.511983 IP (tos 0x0, ttl 64, id 17967, offset 0, flags [DF], proto TCP (6), length 60)


@@ -441,9 +445,11 @@
   161  20:24:40.574081 IP (tos 0x0, ttl 64, id 45979, offset 0, flags [DF], proto TCP (6), length 76)
     127.0.0.1.6633 > 127.0.0.1.51987: Flags [P.], cksum 0xfe40 (incorrect -> 0xba52), seq 1432:1456, ack 1497, win 96, options [nop,nop,TS val 6772442 ecr 6771701], length 24: OpenFlow
        version 1.3, type ROLE_REQUEST, length 24, xid 0x0000012f
   161  20:24:40.574081 IP (tos 0x0, ttl 64, id 45979, offset 0, flags [DF], proto TCP (6), length 76)
     127.0.0.1.6633 > 127.0.0.1.51987: Flags [P.], cksum 0xfe40 (incorrect -> 0xba52), seq 1432:1456, ack 1497, win 96, options [nop,nop,TS val 6772442 ecr 6771701], length 24: OpenFlow
        version 1.3, type ROLE_REQUEST, length 24, xid 0x0000012f

+        role MASTER, generation_id 0x00000000012e248a

   162  20:24:40.574726 IP (tos 0x0, ttl 64, id 49382, offset 0, flags [DF], proto TCP (6), length 76)
     127.0.0.1.51987 > 127.0.0.1.6633: Flags [P.], cksum 0xfe40 (incorrect -> 0xb75e), seq 1497:1521, ack 1456, win 86, options [nop,nop,TS val 6772442 ecr 6772442], length 24: OpenFlow
        version 1.3, type ROLE_REPLY, length 24, xid 0x0000012f
   162  20:24:40.574726 IP (tos 0x0, ttl 64, id 49382, offset 0, flags [DF], proto TCP (6), length 76)
     127.0.0.1.51987 > 127.0.0.1.6633: Flags [P.], cksum 0xfe40 (incorrect -> 0xb75e), seq 1497:1521, ack 1456, win 86, options [nop,nop,TS val 6772442 ecr 6772442], length 24: OpenFlow
        version 1.3, type ROLE_REPLY, length 24, xid 0x0000012f

+        role MASTER, generation_id 0x00000000012e248a

   163  20:24:40.574748 IP (tos 0x0, ttl 64, id 45980, offset 0, flags [DF], proto TCP (6), length 52)
     127.0.0.1.6633 > 127.0.0.1.51987: Flags [.], cksum 0xfe28 (incorrect -> 0xe276), ack 1521, win 96, options [nop,nop,TS val 6772442 ecr 6772442], length 0
   164  20:28:52.608224 IP (tos 0x0, ttl 64, id 46086, offset 0, flags [DF], proto TCP (6), length 60)
   163  20:24:40.574748 IP (tos 0x0, ttl 64, id 45980, offset 0, flags [DF], proto TCP (6), length 52)
     127.0.0.1.6633 > 127.0.0.1.51987: Flags [.], cksum 0xfe28 (incorrect -> 0xe276), ack 1521, win 96, options [nop,nop,TS val 6772442 ecr 6772442], length 0
   164  20:28:52.608224 IP (tos 0x0, ttl 64, id 46086, offset 0, flags [DF], proto TCP (6), length 60)

diff --git a/tests/of13_ericsson-vv.out b/tests/of13_ericsson-vv.out
index bdba0e7114eece0fd4d5a4c9c51b27bb745c0be5..4538d376d59d5f9c2b58af859c04fbdf6a323d11 100644 (file)
--- a/tests/of13_ericsson-vv.out
+++ b/tests/of13_ericsson-vv.out
@@ -254,6 +254,16 @@
    75  13:15:24.725748 IP (tos 0x0, ttl 64, id 51120, offset 0, flags [DF], proto TCP (6), length 132)
     127.0.0.1.38906 > 127.0.0.1.6633: Flags [P.], cksum 0xfe78 (incorrect -> 0xadc3), seq 2781543975:2781544055, ack 1865664008, win 86, options [nop,nop,TS val 1794904 ecr 1794249], length 80: OpenFlow
        version 1.3, type PORT_STATUS, length 80, xid 0x00000000
    75  13:15:24.725748 IP (tos 0x0, ttl 64, id 51120, offset 0, flags [DF], proto TCP (6), length 132)
     127.0.0.1.38906 > 127.0.0.1.6633: Flags [P.], cksum 0xfe78 (incorrect -> 0xadc3), seq 2781543975:2781544055, ack 1865664008, win 86, options [nop,nop,TS val 1794904 ecr 1794249], length 80: OpenFlow
        version 1.3, type PORT_STATUS, length 80, xid 0x00000000

+        reason ADD
+         port_no 2, hw_addr ca:02:9f:af:e9:1c, name 'veth0'
+          config 0x00000000
+          state 0x00000004 (LIVE)
+          curr 0x00000840 (10GB_FD, COPPER)
+          advertised 0x00000000
+          supported 0x00000000
+          peer 0x00000000
+          curr_speed 10485760kbps
+          max_speed 0kbps

    76  13:15:24.725788 IP (tos 0x0, ttl 64, id 64306, offset 0, flags [DF], proto TCP (6), length 52)
     127.0.0.1.6633 > 127.0.0.1.38906: Flags [.], cksum 0xfe28 (incorrect -> 0x2614), seq 1, ack 80, win 94, options [nop,nop,TS val 1794904 ecr 1794904], length 0
    77  16:37:49.792852 IP (tos 0x0, ttl 64, id 32480, offset 0, flags [DF], proto TCP (6), length 68)
    76  13:15:24.725788 IP (tos 0x0, ttl 64, id 64306, offset 0, flags [DF], proto TCP (6), length 52)
     127.0.0.1.6633 > 127.0.0.1.38906: Flags [.], cksum 0xfe28 (incorrect -> 0x2614), seq 1, ack 80, win 94, options [nop,nop,TS val 1794904 ecr 1794904], length 0
    77  16:37:49.792852 IP (tos 0x0, ttl 64, id 32480, offset 0, flags [DF], proto TCP (6), length 68)


@@ -456,6 +466,16 @@
   150  19:53:23.473744 IP (tos 0x0, ttl 64, id 23790, offset 0, flags [DF], proto TCP (6), length 132)
     127.0.0.1.51984 > 127.0.0.1.6633: Flags [P.], cksum 0xfe78 (incorrect -> 0x92a0), seq 1361:1441, ack 976, win 86, options [nop,nop,TS val 6303167 ecr 6303167], length 80: OpenFlow
        version 1.3, type PORT_STATUS, length 80, xid 0x00000000
   150  19:53:23.473744 IP (tos 0x0, ttl 64, id 23790, offset 0, flags [DF], proto TCP (6), length 132)
     127.0.0.1.51984 > 127.0.0.1.6633: Flags [P.], cksum 0xfe78 (incorrect -> 0x92a0), seq 1361:1441, ack 976, win 86, options [nop,nop,TS val 6303167 ecr 6303167], length 80: OpenFlow
        version 1.3, type PORT_STATUS, length 80, xid 0x00000000

+        reason MODIFY
+         port_no 1, hw_addr 0a:ea:83:10:db:09, name 'veth0'
+          config 0x00000040 (NO_PACKET_IN)
+          state 0x00000004 (LIVE)
+          curr 0x00000840 (10GB_FD, COPPER)
+          advertised 0x00000000
+          supported 0x00000000
+          peer 0x00000000
+          curr_speed 10485760kbps
+          max_speed 0kbps

   151  19:53:23.473777 IP (tos 0x0, ttl 64, id 17918, offset 0, flags [DF], proto TCP (6), length 52)
     127.0.0.1.6633 > 127.0.0.1.51984: Flags [.], cksum 0xfe28 (incorrect -> 0x25f0), seq 976, ack 1441, win 98, options [nop,nop,TS val 6303167 ecr 6303167], length 0
   152  19:55:19.511983 IP (tos 0x0, ttl 64, id 17967, offset 0, flags [DF], proto TCP (6), length 60)
   151  19:53:23.473777 IP (tos 0x0, ttl 64, id 17918, offset 0, flags [DF], proto TCP (6), length 52)
     127.0.0.1.6633 > 127.0.0.1.51984: Flags [.], cksum 0xfe28 (incorrect -> 0x25f0), seq 976, ack 1441, win 98, options [nop,nop,TS val 6303167 ecr 6303167], length 0
   152  19:55:19.511983 IP (tos 0x0, ttl 64, id 17967, offset 0, flags [DF], proto TCP (6), length 60)


@@ -486,9 +506,11 @@
   161  20:24:40.574081 IP (tos 0x0, ttl 64, id 45979, offset 0, flags [DF], proto TCP (6), length 76)
     127.0.0.1.6633 > 127.0.0.1.51987: Flags [P.], cksum 0xfe40 (incorrect -> 0xba52), seq 1432:1456, ack 1497, win 96, options [nop,nop,TS val 6772442 ecr 6771701], length 24: OpenFlow
        version 1.3, type ROLE_REQUEST, length 24, xid 0x0000012f
   161  20:24:40.574081 IP (tos 0x0, ttl 64, id 45979, offset 0, flags [DF], proto TCP (6), length 76)
     127.0.0.1.6633 > 127.0.0.1.51987: Flags [P.], cksum 0xfe40 (incorrect -> 0xba52), seq 1432:1456, ack 1497, win 96, options [nop,nop,TS val 6772442 ecr 6771701], length 24: OpenFlow
        version 1.3, type ROLE_REQUEST, length 24, xid 0x0000012f

+        role MASTER, generation_id 0x00000000012e248a

   162  20:24:40.574726 IP (tos 0x0, ttl 64, id 49382, offset 0, flags [DF], proto TCP (6), length 76)
     127.0.0.1.51987 > 127.0.0.1.6633: Flags [P.], cksum 0xfe40 (incorrect -> 0xb75e), seq 1497:1521, ack 1456, win 86, options [nop,nop,TS val 6772442 ecr 6772442], length 24: OpenFlow
        version 1.3, type ROLE_REPLY, length 24, xid 0x0000012f
   162  20:24:40.574726 IP (tos 0x0, ttl 64, id 49382, offset 0, flags [DF], proto TCP (6), length 76)
     127.0.0.1.51987 > 127.0.0.1.6633: Flags [P.], cksum 0xfe40 (incorrect -> 0xb75e), seq 1497:1521, ack 1456, win 86, options [nop,nop,TS val 6772442 ecr 6772442], length 24: OpenFlow
        version 1.3, type ROLE_REPLY, length 24, xid 0x0000012f

+        role MASTER, generation_id 0x00000000012e248a

   163  20:24:40.574748 IP (tos 0x0, ttl 64, id 45980, offset 0, flags [DF], proto TCP (6), length 52)
     127.0.0.1.6633 > 127.0.0.1.51987: Flags [.], cksum 0xfe28 (incorrect -> 0xe276), seq 1456, ack 1521, win 96, options [nop,nop,TS val 6772442 ecr 6772442], length 0
   164  20:28:52.608224 IP (tos 0x0, ttl 64, id 46086, offset 0, flags [DF], proto TCP (6), length 60)
   163  20:24:40.574748 IP (tos 0x0, ttl 64, id 45980, offset 0, flags [DF], proto TCP (6), length 52)
     127.0.0.1.6633 > 127.0.0.1.51987: Flags [.], cksum 0xfe28 (incorrect -> 0xe276), seq 1456, ack 1521, win 96, options [nop,nop,TS val 6772442 ecr 6772442], length 0
   164  20:28:52.608224 IP (tos 0x0, ttl 64, id 46086, offset 0, flags [DF], proto TCP (6), length 60)