/*
* Routines to handle various versions of OpenFlow.
*/
-extern void of10_message_print(netdissect_options *ndo,
- const u_char *, uint16_t, const uint8_t);
-extern void of13_message_print(netdissect_options *ndo,
- const u_char *, uint16_t, const uint8_t);
-/*
- * Use this instead of ofpt_str[] and OFPT_ constants because OpenFlow
- * specifications define protocol encoding in C syntax, and different
- * versions clash on many names, including the OFPT_ constants.
- */
-extern const char * of10_msgtype_str(const uint8_t);
-extern const char * of13_msgtype_str(const uint8_t);
+struct of_msgtypeinfo {
+ /* Should not be NULL. */
+ const char *name;
+ /* May be NULL to mean "message body printing is not implemented". */
+ void (*decoder)(netdissect_options *ndo, const u_char *, const u_int);
+ enum {
+ REQ_NONE, /* Message body length may be anything. */
+ REQ_FIXLEN, /* Message body length must be == req_value. */
+ REQ_MINLEN, /* Message body length must be >= req_value. */
+ } req_what;
+ uint16_t req_value;
+};
+
+extern const struct of_msgtypeinfo *of10_identify_msgtype(const uint8_t);
+extern const struct of_msgtypeinfo *of13_identify_msgtype(const uint8_t);
#define OFPT_BARRIER_REPLY 0x13
#define OFPT_QUEUE_GET_CONFIG_REQUEST 0x14
#define OFPT_QUEUE_GET_CONFIG_REPLY 0x15
-static const struct tok ofpt_str[] = {
- { OFPT_HELLO, "HELLO" },
- { OFPT_ERROR, "ERROR" },
- { OFPT_ECHO_REQUEST, "ECHO_REQUEST" },
- { OFPT_ECHO_REPLY, "ECHO_REPLY" },
- { OFPT_VENDOR, "VENDOR" },
- { OFPT_FEATURES_REQUEST, "FEATURES_REQUEST" },
- { OFPT_FEATURES_REPLY, "FEATURES_REPLY" },
- { OFPT_GET_CONFIG_REQUEST, "GET_CONFIG_REQUEST" },
- { OFPT_GET_CONFIG_REPLY, "GET_CONFIG_REPLY" },
- { OFPT_SET_CONFIG, "SET_CONFIG" },
- { OFPT_PACKET_IN, "PACKET_IN" },
- { OFPT_FLOW_REMOVED, "FLOW_REMOVED" },
- { OFPT_PORT_STATUS, "PORT_STATUS" },
- { OFPT_PACKET_OUT, "PACKET_OUT" },
- { OFPT_FLOW_MOD, "FLOW_MOD" },
- { OFPT_PORT_MOD, "PORT_MOD" },
- { OFPT_STATS_REQUEST, "STATS_REQUEST" },
- { OFPT_STATS_REPLY, "STATS_REPLY" },
- { OFPT_BARRIER_REQUEST, "BARRIER_REQUEST" },
- { OFPT_BARRIER_REPLY, "BARRIER_REPLY" },
- { OFPT_QUEUE_GET_CONFIG_REQUEST, "QUEUE_GET_CONFIG_REQUEST" },
- { OFPT_QUEUE_GET_CONFIG_REPLY, "QUEUE_GET_CONFIG_REPLY" },
- { 0, NULL }
-};
+#define OFPT_MAX OFPT_QUEUE_GET_CONFIG_REPLY
#define OFPPC_PORT_DOWN (1U <<0)
#define OFPPC_NO_STP (1U <<1)
{ 0, NULL },
};
-/* [OF10] Section 5.1 */
-const char * of10_msgtype_str(const uint8_t type)
-{
- return tok2str(ofpt_str, "invalid (0x%02x)", type);
-}
-
static const char *
vlan_str(const uint16_t vid)
{
of_data_print(ndo, cp, len);
}
-void
-of10_message_print(netdissect_options *ndo,
- const u_char *cp, uint16_t len, const uint8_t type)
-{
+static const struct of_msgtypeinfo of10_msgtypeinfo[OFPT_MAX + 1] = {
/*
- * Here "cp" and "len" stand for the message part beyond the common
- * OpenFlow 1.0 header, if any.
- *
- * Most message types are longer than just the header, and the length
- * constraints may be complex. When possible, validate the constraint
- * completely here, otherwise check that the message is long enough to
- * begin the decoding and let the lower-layer function do any remaining
- * validation.
+ * [OF10] Section 5.5.1
+ * Variable-size data.
*/
- switch (type) {
- /* OpenFlow header only. */
- case OFPT_FEATURES_REQUEST: /* [OF10] Section 5.3.1 */
- case OFPT_GET_CONFIG_REQUEST: /* [OF10] Section 5.3.2 */
- case OFPT_BARRIER_REQUEST: /* [OF10] Section 5.3.7 */
- case OFPT_BARRIER_REPLY: /* ibid */
- if (len)
- goto invalid;
- return;
-
- /* OpenFlow header and fixed-size message body. */
- case OFPT_SET_CONFIG: /* [OF10] Section 5.3.2 */
- case OFPT_GET_CONFIG_REPLY: /* ibid */
- if (len != OF_SWITCH_CONFIG_FIXLEN)
- goto invalid;
- if (ndo->ndo_vflag < 1)
- break;
- of10_switch_config_msg_print(ndo, cp, len);
- return;
- case OFPT_PORT_MOD:
- if (len != OF_PORT_MOD_FIXLEN)
- goto invalid;
- if (ndo->ndo_vflag < 1)
- break;
- of10_port_mod_print(ndo, cp, len);
- return;
- case OFPT_QUEUE_GET_CONFIG_REQUEST: /* [OF10] Section 5.3.4 */
- if (len != OF_QUEUE_GET_CONFIG_REQUEST_FIXLEN)
- goto invalid;
- if (ndo->ndo_vflag < 1)
- break;
- of10_queue_get_config_request_print(ndo, cp, len);
- return;
- case OFPT_FLOW_REMOVED:
- if (len != OF_FLOW_REMOVED_FIXLEN)
- goto invalid;
- if (ndo->ndo_vflag < 1)
- break;
- of10_flow_removed_print(ndo, cp, len);
- return;
- case OFPT_PORT_STATUS: /* [OF10] Section 5.4.3 */
- if (len != OF_PORT_STATUS_FIXLEN)
- goto invalid;
- if (ndo->ndo_vflag < 1)
- break;
- of10_port_status_print(ndo, cp, len);
- return;
-
- /* OpenFlow header, fixed-size message body and n * fixed-size data units. */
- case OFPT_FEATURES_REPLY:
- if (len < OF_FEATURES_REPLY_MINLEN)
- goto invalid;
- if (ndo->ndo_vflag < 1)
- break;
- of10_features_reply_print(ndo, cp, len);
- return;
-
- /* OpenFlow header and variable-size data. */
- case OFPT_HELLO: /* [OF10] Section 5.5.1 */
- case OFPT_ECHO_REQUEST: /* [OF10] Section 5.5.2 */
- case OFPT_ECHO_REPLY: /* [OF10] Section 5.5.3 */
- if (ndo->ndo_vflag < 1)
- break;
- of_data_print(ndo, cp, len);
- return;
-
- /* OpenFlow header, fixed-size message body and variable-size data. */
- case OFPT_ERROR:
- if (len < OF_ERROR_MSG_MINLEN)
- goto invalid;
- if (ndo->ndo_vflag < 1)
- break;
- of10_error_print(ndo, cp, len);
- return;
- case OFPT_VENDOR:
- /* [OF10] Section 5.5.4 */
- if (len < OF_VENDOR_MINLEN)
- goto invalid;
- if (ndo->ndo_vflag < 1)
- break;
- of10_vendor_message_print(ndo, cp, len);
- return;
- case OFPT_PACKET_IN:
- /* 2 mock octets count in OF_PACKET_IN_MINLEN but not in len */
- if (len < OF_PACKET_IN_MINLEN - 2)
- goto invalid;
- if (ndo->ndo_vflag < 1)
- break;
- of10_packet_in_print(ndo, cp, len);
- return;
-
- /* a. OpenFlow header. */
- /* b. OpenFlow header and one of the fixed-size message bodies. */
- /* c. OpenFlow header, fixed-size message body and variable-size data. */
- case OFPT_STATS_REQUEST:
- if (len < OF_STATS_REQUEST_MINLEN)
- goto invalid;
- if (ndo->ndo_vflag < 1)
- break;
- of10_stats_request_print(ndo, cp, len);
- return;
-
- /* a. OpenFlow header and fixed-size message body. */
- /* b. OpenFlow header and n * fixed-size data units. */
- /* c. OpenFlow header and n * variable-size data units. */
- /* d. OpenFlow header, fixed-size message body and variable-size data. */
- case OFPT_STATS_REPLY:
- if (len < OF_STATS_REPLY_MINLEN)
- goto invalid;
- if (ndo->ndo_vflag < 1)
- break;
- of10_stats_reply_print(ndo, cp, len);
- return;
-
- /* OpenFlow header and n * variable-size data units and variable-size data. */
- case OFPT_PACKET_OUT:
- if (len < OF_PACKET_OUT_MINLEN)
- goto invalid;
- if (ndo->ndo_vflag < 1)
- break;
- of10_packet_out_print(ndo, cp, len);
- return;
-
- /* OpenFlow header, fixed-size message body and n * variable-size data units. */
- case OFPT_FLOW_MOD:
- if (len < OF_FLOW_MOD_MINLEN)
- goto invalid;
- if (ndo->ndo_vflag < 1)
- break;
- of10_flow_mod_print(ndo, cp, len);
- return;
-
- /* OpenFlow header, fixed-size message body and n * variable-size data units. */
- case OFPT_QUEUE_GET_CONFIG_REPLY: /* [OF10] Section 5.3.4 */
- if (len < OF_QUEUE_GET_CONFIG_REPLY_MINLEN)
- goto invalid;
- if (ndo->ndo_vflag < 1)
- break;
- of10_queue_get_config_reply_print(ndo, cp, len);
- return;
- } /* switch (type) */
+ {
+ "HELLO", of_data_print,
+ REQ_MINLEN, 0
+ },
/*
- * Not a recognised type or did not print the details, fall back to
- * a bounds check.
+ * [OF10] Section 5.4.4
+ * A fixed-size message body and variable-size data.
*/
- ND_TCHECK_LEN(cp, len);
- return;
+ {
+ "ERROR", of10_error_print,
+ REQ_MINLEN, OF_ERROR_MSG_MINLEN
+ },
+ /*
+ * [OF10] Section 5.5.2
+ * Variable-size data.
+ */
+ {
+ "ECHO_REQUEST", of_data_print,
+ REQ_MINLEN, 0
+ },
+ /*
+ * [OF10] Section 5.5.3
+ * Variable-size data.
+ */
+ {
+ "ECHO_REPLY", of_data_print,
+ REQ_MINLEN, 0
+ },
+ /*
+ * [OF10] Section 5.5.4
+ * A fixed-size message body and variable-size data.
+ */
+ {
+ "VENDOR", of10_vendor_message_print,
+ REQ_MINLEN, OF_VENDOR_MINLEN
+ },
+ /*
+ * [OF10] Section 5.3.1
+ * No message body.
+ */
+ {
+ "FEATURES_REQUEST", NULL,
+ REQ_FIXLEN, 0
+ },
+ /*
+ * [OF10] Section 5.3.1
+ * A fixed-size message body and n * fixed-size data units.
+ */
+ {
+ "FEATURES_REPLY", of10_features_reply_print,
+ REQ_MINLEN, OF_FEATURES_REPLY_MINLEN
+ },
+ /*
+ * [OF10] Section 5.3.2
+ * No message body.
+ */
+ {
+ "GET_CONFIG_REQUEST", NULL,
+ REQ_FIXLEN, 0
+ },
+ /*
+ * [OF10] Section 5.3.2
+ * A fixed-size message body.
+ */
+ {
+ "GET_CONFIG_REPLY", of10_switch_config_msg_print,
+ REQ_FIXLEN, OF_SWITCH_CONFIG_FIXLEN
+ },
+ /*
+ * [OF10] Section 5.3.2
+ * A fixed-size message body.
+ */
+ {
+ "SET_CONFIG", of10_switch_config_msg_print,
+ REQ_FIXLEN, OF_SWITCH_CONFIG_FIXLEN
+ },
+ /*
+ * [OF10] Section 5.4.1
+ * A fixed-size message body and variable-size data.
+ * (The 2 mock octets count in OF_PACKET_IN_MINLEN only.)
+ */
+ {
+ "PACKET_IN", of10_packet_in_print,
+ REQ_MINLEN, OF_PACKET_IN_MINLEN - 2
+ },
+ /*
+ * [OF10] Section 5.4.2
+ * A fixed-size message body.
+ */
+ {
+ "FLOW_REMOVED", of10_flow_removed_print,
+ REQ_FIXLEN, OF_FLOW_REMOVED_FIXLEN
+ },
+ /*
+ * [OF10] Section 5.4.3
+ * A fixed-size message body.
+ */
+ {
+ "PORT_STATUS", of10_port_status_print,
+ REQ_FIXLEN, OF_PORT_STATUS_FIXLEN
+ },
+ /*
+ * [OF10] Section 5.3.6
+ * A fixed-size message body, n * variable-size data units and
+ * variable-size data.
+ */
+ {
+ "PACKET_OUT", of10_packet_out_print,
+ REQ_MINLEN, OF_PACKET_OUT_MINLEN
+ },
+ /*
+ * [OF10] Section 5.3.3
+ * A fixed-size message body and n * variable-size data units.
+ */
+ {
+ "FLOW_MOD", of10_flow_mod_print,
+ REQ_MINLEN, OF_FLOW_MOD_MINLEN
+ },
+ /*
+ * [OF10] Section 5.3.3
+ * A fixed-size message body.
+ */
+ {
+ "PORT_MOD", of10_port_mod_print,
+ REQ_FIXLEN, OF_PORT_MOD_FIXLEN
+ },
+ /*
+ * [OF10] Section 5.3.5
+ * A fixed-size message body and possibly more data of varying size
+ * and structure.
+ */
+ {
+ "STATS_REQUEST", of10_stats_request_print,
+ REQ_MINLEN, OF_STATS_REQUEST_MINLEN
+ },
+ /*
+ * [OF10] Section 5.3.5
+ * A fixed-size message body and possibly more data of varying size
+ * and structure.
+ */
+ {
+ "STATS_REPLY", of10_stats_reply_print,
+ REQ_MINLEN, OF_STATS_REPLY_MINLEN
+ },
+ /*
+ * [OF10] Section 5.3.7
+ * No message body.
+ */
+ {
+ "BARRIER_REQUEST", NULL,
+ REQ_FIXLEN, 0
+ },
+ /*
+ * [OF10] Section 5.3.7
+ * No message body.
+ */
+ {
+ "BARRIER_REPLY", NULL,
+ REQ_FIXLEN, 0
+ },
+ /*
+ * [OF10] Section 5.3.4
+ * A fixed-size message body.
+ */
+ {
+ "QUEUE_GET_CONFIG_REQUEST", of10_queue_get_config_request_print,
+ REQ_FIXLEN, OF_QUEUE_GET_CONFIG_REQUEST_FIXLEN
+ },
+ /*
+ * [OF10] Section 5.3.4
+ * A fixed-size message body and n * variable-size data units.
+ */
+ {
+ "QUEUE_GET_CONFIG_REPLY", of10_queue_get_config_reply_print,
+ REQ_MINLEN, OF_QUEUE_GET_CONFIG_REPLY_MINLEN
+ },
+};
-invalid: /* skip the message body */
- nd_print_invalid(ndo);
- ND_TCHECK_LEN(cp, len);
+const struct of_msgtypeinfo *
+of10_identify_msgtype(const uint8_t type)
+{
+ return type <= OFPT_MAX ? &of10_msgtypeinfo[type] : NULL;
}
* protocol 0x04). It is based on the implementation conventions explained in
* print-openflow-1.0.c.
*
- * [OF13] https://www.opennetworking.org/wp-content/uploads/2014/10/openflow-switch-v1.3.4.pdf
+ * [OF13] https://www.opennetworking.org/wp-content/uploads/2014/10/openflow-switch-v1.3.5.pdf
*
* Copyright (c) 2020 The TCPDUMP project
* All rights reserved.
#define OFPT_GET_ASYNC_REPLY 27U
#define OFPT_SET_ASYNC 28U
#define OFPT_METER_MOD 29U
-static const struct tok ofpt_str[] = {
- { OFPT_HELLO, "HELLO" },
- { OFPT_ERROR, "ERROR" },
- { OFPT_ECHO_REQUEST, "ECHO_REQUEST" },
- { OFPT_ECHO_REPLY, "ECHO_REPLY" },
- { OFPT_EXPERIMENTER, "EXPERIMENTER" },
- { OFPT_FEATURES_REQUEST, "FEATURES_REQUEST" },
- { OFPT_FEATURES_REPLY, "FEATURES_REPLY" },
- { OFPT_GET_CONFIG_REQUEST, "GET_CONFIG_REQUEST" },
- { OFPT_GET_CONFIG_REPLY, "GET_CONFIG_REPLY" },
- { OFPT_SET_CONFIG, "SET_CONFIG" },
- { OFPT_PACKET_IN, "PACKET_IN" },
- { OFPT_FLOW_REMOVED, "FLOW_REMOVED" },
- { OFPT_PORT_STATUS, "PORT_STATUS" },
- { OFPT_PACKET_OUT, "PACKET_OUT" },
- { OFPT_FLOW_MOD, "FLOW_MOD" },
- { OFPT_GROUP_MOD, "GROUP_MOD" },
- { OFPT_PORT_MOD, "PORT_MOD" },
- { OFPT_TABLE_MOD, "TABLE_MOD" },
- { OFPT_MULTIPART_REQUEST, "MULTIPART_REQUEST" },
- { OFPT_MULTIPART_REPLY, "MULTIPART_REPLY" },
- { OFPT_BARRIER_REQUEST, "BARRIER_REQUEST" },
- { OFPT_BARRIER_REPLY, "BARRIER_REPLY" },
- { OFPT_QUEUE_GET_CONFIG_REQUEST, "QUEUE_GET_CONFIG_REQUEST" },
- { OFPT_QUEUE_GET_CONFIG_REPLY, "QUEUE_GET_CONFIG_REPLY" },
- { OFPT_ROLE_REQUEST, "ROLE_REQUEST" },
- { OFPT_ROLE_REPLY, "ROLE_REPLY" },
- { OFPT_GET_ASYNC_REQUEST, "GET_ASYNC_REQUEST" },
- { OFPT_GET_ASYNC_REPLY, "GET_ASYNC_REPLY" },
- { OFPT_SET_ASYNC, "SET_ASYNC" },
- { OFPT_METER_MOD, "METER_MOD" },
- { 0, NULL }
-};
+#define OFPT_MAX OFPT_METER_MOD
#define OFPC_FLOW_STATS (1U <<0)
#define OFPC_TABLE_STATS (1U <<1)
/* miscellaneous constants from [OF13] */
#define OFP_MAX_PORT_NAME_LEN 16U
-/* [OF13] Section A.1 */
-const char *
-of13_msgtype_str(const uint8_t type)
-{
- return tok2str(ofpt_str, "invalid (0x%02x)", type);
-}
-
/* [OF13] Section 7.2.1 */
static void
of13_port_print(netdissect_options *ndo,
of_data_print(ndo, cp, len);
}
-/* [OF13] Section A.3.6 */
+/* [OF13] Section 7.3.6 */
static void
of13_queue_get_config_request_print(netdissect_options *ndo,
const u_char *cp, u_int len _U_)
ND_TCHECK_4(cp);
}
-/* [OF13] Section A.4.4 */
+/* [OF13] Section 7.4.4 */
static void
of13_error_print(netdissect_options *ndo,
const u_char *cp, u_int len)
of_data_print(ndo, cp, len);
}
-void
-of13_message_print(netdissect_options *ndo,
- const u_char *cp, uint16_t len, const uint8_t type)
-{
- /* See the comment at the beginning of of10_message_print(). */
- switch (type) {
- /* OpenFlow header only. */
- case OFPT_FEATURES_REQUEST: /* [OF13] Section A.3.1 */
- case OFPT_GET_CONFIG_REQUEST: /* [OF13] Section A.3.2 */
- case OFPT_BARRIER_REQUEST: /* [OF13] Section A.3.8 */
- case OFPT_BARRIER_REPLY: /* ibid */
- case OFPT_GET_ASYNC_REQUEST: /* [OF13] Section 7.3.10 */
- if (len)
- goto invalid;
- return;
-
- /* OpenFlow header and fixed-size message body. */
- case OFPT_FEATURES_REPLY:
- if (len != OF_FEATURES_REPLY_FIXLEN)
- goto invalid;
- if (ndo->ndo_vflag < 1)
- break;
- of13_features_reply_print(ndo, cp, len);
- return;
- case OFPT_QUEUE_GET_CONFIG_REQUEST: /* [OF13] Section A.3.6 */
- if (len != OF_QUEUE_GET_CONFIG_REQUEST_FIXLEN)
- goto invalid;
- if (ndo->ndo_vflag < 1)
- break;
- of13_queue_get_config_request_print(ndo, cp, len);
- return;
- case OFPT_GET_CONFIG_REPLY: /* [OF13] Section 7.3.2 */
- case OFPT_SET_CONFIG: /* ibid */
- if (len != OF_SWITCH_CONFIG_MSG_FIXLEN)
- goto invalid;
- if (ndo->ndo_vflag < 1)
- break;
- of13_switch_config_msg_print(ndo, cp, len);
- return;
- case OFPT_PORT_MOD: /* [OF13] Section 7.3.4.3 */
- if (len != OF_PORT_MOD_FIXLEN)
- goto invalid;
- if (ndo->ndo_vflag < 1)
- 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)
- goto invalid;
- if (ndo->ndo_vflag < 1)
- break;
- of13_role_msg_print(ndo, cp, len);
- return;
- case OFPT_PORT_STATUS: /* [OF13] Section 7.4.3 */
- if (len != OF_PORT_STATUS_FIXLEN)
- goto invalid;
- if (ndo->ndo_vflag < 1)
- break;
- of13_port_status_print(ndo, cp, len);
- return;
- case OFPT_TABLE_MOD: /* [OF13] Section 7.3.3 */
- if (len != OF_TABLE_MOD_FIXLEN)
- goto invalid;
- if (ndo->ndo_vflag < 1)
- break;
- of13_table_mod_print(ndo, cp, len);
- return;
- case OFPT_SET_ASYNC: /* [OF13] Section 7.3.10 */
- case OFPT_GET_ASYNC_REPLY: /* ibid */
- if (len != OF_ASYNC_MSG_FIXLEN)
- goto invalid;
- if (ndo->ndo_vflag < 1)
- break;
- of13_async_msg_print(ndo, cp, len);
- return;
-
- /* OpenFlow header and variable-size data. */
- case OFPT_ECHO_REQUEST: /* [OF13] Section A.5.2 */
- case OFPT_ECHO_REPLY: /* [OF13] Section A.5.3 */
- if (ndo->ndo_vflag < 1)
- break;
- of_data_print(ndo, cp, len);
- return;
-
- /* OpenFlow header and n * variable-size data units. */
- case OFPT_HELLO: /* [OF13] Section A.5.1 */
- if (ndo->ndo_vflag < 1)
- break;
- of13_hello_elements_print(ndo, cp, len);
- return;
-
- /* OpenFlow header, fixed-size message body and variable-size data. */
- case OFPT_ERROR:
- if (len < OF_ERROR_MSG_MINLEN)
- goto invalid;
- if (ndo->ndo_vflag < 1)
- break;
- of13_error_print(ndo, cp, len);
- return;
- case OFPT_EXPERIMENTER: /* [OF13] Section 7.5.4 */
- if (len < OF_EXPERIMENTER_MSG_MINLEN)
- goto invalid;
- if (ndo->ndo_vflag < 1)
- break;
- of13_experimenter_message_print(ndo, cp, len);
- return;
- }
+static const struct of_msgtypeinfo of13_msgtypeinfo[OFPT_MAX + 1] = {
/*
- * Not a recognised type or did not print the details, fall back to
- * a bounds check.
+ * [OF13] Section 7.5.1
+ * n * variable-size data units.
*/
- ND_TCHECK_LEN(cp, len);
- return;
+ {
+ "HELLO", of13_hello_elements_print,
+ REQ_MINLEN, 0
+ },
+ /*
+ * [OF13] Section 7.4.4
+ * A fixed-size message body and variable-size data.
+ */
+ {
+ "ERROR", of13_error_print,
+ REQ_MINLEN, OF_ERROR_MSG_MINLEN
+ },
+ /*
+ * [OF13] Section 7.5.2
+ * Variable-size data.
+ */
+ {
+ "ECHO_REQUEST", of_data_print,
+ REQ_MINLEN, 0
+ },
+ /*
+ * [OF13] Section 7.5.3
+ * Variable-size data.
+ */
+ {
+ "ECHO_REPLY", of_data_print,
+ REQ_MINLEN, 0
+ },
+ /*
+ * [OF13] Section 7.5.4
+ * A fixed-size message body and variable-size data.
+ */
+ {
+ "EXPERIMENTER", of13_experimenter_message_print,
+ REQ_MINLEN, OF_EXPERIMENTER_MSG_MINLEN
+ },
+ /*
+ * [OF13] Section 7.3.1
+ * No message body.
+ */
+ {
+ "FEATURES_REQUEST", NULL,
+ REQ_FIXLEN, 0
+ },
+ /*
+ * [OF13] Section 7.3.1
+ * A fixed-size message body.
+ */
+ {
+ "FEATURES_REPLY", of13_features_reply_print,
+ REQ_FIXLEN, OF_FEATURES_REPLY_FIXLEN
+ },
+ /*
+ * [OF13] Section 7.3.2
+ * No message body.
+ */
+ {
+ "GET_CONFIG_REQUEST", NULL,
+ REQ_FIXLEN, 0
+ },
+ /*
+ * [OF13] Section 7.3.2
+ * A fixed-size message body.
+ */
+ {
+ "GET_CONFIG_REPLY", of13_switch_config_msg_print,
+ REQ_FIXLEN, OF_SWITCH_CONFIG_MSG_FIXLEN
+ },
+ /*
+ * [OF13] Section 7.3.2
+ * A fixed-size message body.
+ */
+ {
+ "SET_CONFIG", of13_switch_config_msg_print,
+ REQ_FIXLEN, OF_SWITCH_CONFIG_MSG_FIXLEN
+ },
+ /*
+ * [OF13] Section 7.4.1
+ * (to be done)
+ */
+ {
+ "PACKET_IN", NULL,
+ REQ_NONE, 0
+ },
+ /*
+ * [OF13] Section 7.4.2
+ * (to be done)
+ */
+ {
+ "FLOW_REMOVED", NULL,
+ REQ_NONE, 0
+ },
+ /*
+ * [OF13] Section 7.4.3
+ * A fixed-size message body.
+ */
+ {
+ "PORT_STATUS", of13_port_status_print,
+ REQ_FIXLEN, OF_PORT_STATUS_FIXLEN
+ },
+ /*
+ * [OF13] Section 7.3.7
+ * (to be done)
+ */
+ {
+ "PACKET_OUT", NULL,
+ REQ_NONE, 0
+ },
+ /*
+ * [OF13] Section 7.3.4.1
+ * (to be done)
+ */
+ {
+ "FLOW_MOD", NULL,
+ REQ_NONE, 0
+ },
+ /*
+ * [OF13] Section 7.3.4.2
+ * (to be done)
+ */
+ {
+ "GROUP_MOD", NULL,
+ REQ_NONE, 0
+ },
+ /*
+ * [OF13] Section 7.3.4.3
+ * A fixed-size message body.
+ */
+ {
+ "PORT_MOD", of13_port_mod_print,
+ REQ_FIXLEN, OF_PORT_MOD_FIXLEN
+ },
+ /*
+ * [OF13] Section 7.3.3
+ * A fixed-size message body.
+ */
+ {
+ "TABLE_MOD", of13_table_mod_print,
+ REQ_FIXLEN, OF_TABLE_MOD_FIXLEN
+ },
+ /*
+ * [OF13] Section 7.3.5
+ * (to be done)
+ */
+ {
+ "MULTIPART_REQUEST", NULL,
+ REQ_NONE, 0
+ },
+ /*
+ * [OF13] Section 7.3.5
+ * (to be done)
+ */
+ {
+ "MULTIPART_REPLY", NULL,
+ REQ_NONE, 0
+ },
+ /*
+ * [OF13] Section 7.3.8
+ * No message body.
+ */
+ {
+ "BARRIER_REQUEST", NULL,
+ REQ_FIXLEN, 0
+ },
+ /*
+ * [OF13] Section 7.3.8
+ * No message body.
+ */
+ {
+ "BARRIER_REPLY", NULL,
+ REQ_FIXLEN, 0
+ },
+ /*
+ * [OF13] Section 7.3.6
+ * A fixed-size message body.
+ */
+ {
+ "QUEUE_GET_CONFIG_REQUEST", of13_queue_get_config_request_print,
+ REQ_FIXLEN, OF_QUEUE_GET_CONFIG_REQUEST_FIXLEN
+ },
+ /*
+ * [OF13] Section 7.3.6
+ * (to be done)
+ */
+ {
+ "QUEUE_GET_CONFIG_REPLY", NULL,
+ REQ_NONE, 0
+ },
+ /*
+ * [OF13] Section 7.3.9
+ * A fixed-size message body.
+ */
+ {
+ "ROLE_REQUEST", of13_role_msg_print,
+ REQ_FIXLEN, OF_ROLE_MSG_FIXLEN
+ },
+ /*
+ * [OF13] Section 7.3.9
+ * A fixed-size message body.
+ */
+ {
+ "ROLE_REPLY", of13_role_msg_print,
+ REQ_FIXLEN, OF_ROLE_MSG_FIXLEN
+ },
+ /*
+ * [OF13] Section 7.3.10
+ * No message body.
+ */
+ {
+ "GET_ASYNC_REQUEST", NULL,
+ REQ_FIXLEN, 0
+ },
+ /*
+ * [OF13] Section 7.3.10
+ * A fixed-size message body.
+ */
+ {
+ "GET_ASYNC_REPLY", of13_async_msg_print,
+ REQ_FIXLEN, OF_ASYNC_MSG_FIXLEN
+ },
+ /*
+ * [OF13] Section 7.3.10
+ * A fixed-size message body.
+ */
+ {
+ "SET_ASYNC", of13_async_msg_print,
+ REQ_FIXLEN, OF_ASYNC_MSG_FIXLEN
+ },
+ /*
+ * [OF13] Section 7.3.4.4
+ * (to be done)
+ */
+ {
+ "METER_MOD", NULL,
+ REQ_NONE, 0
+ },
+};
-invalid: /* skip the message body */
- nd_print_invalid(ndo);
- ND_TCHECK_LEN(cp, len);
+const struct of_msgtypeinfo *
+of13_identify_msgtype(const uint8_t type)
+{
+ return type <= OFPT_MAX ? &of13_msgtypeinfo[type] : NULL;
}
ND_TCHECK_LEN(cp, len);
}
+static void
+of_message_print(netdissect_options *ndo,
+ const u_char *cp, uint16_t len,
+ const struct of_msgtypeinfo *mti)
+{
+ /*
+ * Here "cp" and "len" stand for the message part beyond the common
+ * OpenFlow 1.0 header, if any.
+ *
+ * Most message types are longer than just the header, and the length
+ * constraints may be complex. When possible, validate the constraint
+ * completely here (REQ_FIXLEN), otherwise check that the message is
+ * long enough to begin the decoding (REQ_MINLEN) and have the
+ * type-specific function do any remaining validation.
+ */
+
+ if (!mti)
+ goto tcheck_remainder;
+
+ if ((mti->req_what == REQ_FIXLEN && len != mti->req_value) ||
+ (mti->req_what == REQ_MINLEN && len < mti->req_value))
+ goto invalid;
+
+ if (!ndo->ndo_vflag || !mti->decoder)
+ goto tcheck_remainder;
+
+ mti->decoder(ndo, cp, len);
+ return;
+
+invalid:
+ nd_print_invalid(ndo);
+tcheck_remainder:
+ ND_TCHECK_LEN(cp, len);
+}
+
/* Print a TCP segment worth of OpenFlow messages presuming the segment begins
* on a message boundary. */
void
/* Print a single OpenFlow message. */
uint8_t version, type;
uint16_t length;
- void (*decoder)(struct netdissect_options *,
- const u_char *, uint16_t, const uint8_t) = NULL;
+ const struct of_msgtypeinfo *mti;
/* version */
version = GET_U_1(cp);
goto partial_header;
type = GET_U_1(cp);
OF_FWD(1);
- switch (version) {
- case OF_VER_1_0:
- ND_PRINT(", type %s", of10_msgtype_str(type));
- decoder = of10_message_print;
- break;
- case OF_VER_1_3:
- ND_PRINT(", type %s", of13_msgtype_str(type));
- decoder = of13_message_print;
- break;
- default:
+ mti =
+ version == OF_VER_1_0 ? of10_identify_msgtype(type) :
+ version == OF_VER_1_3 ? of13_identify_msgtype(type) :
+ NULL;
+ if (mti && mti->name)
+ ND_PRINT(", type %s", mti->name);
+ else
ND_PRINT(", type unknown (0x%02x)", type);
- }
/* length */
if (len < 2)
goto partial_header;
if (length < OF_HEADER_FIXLEN)
goto invalid;
- if (decoder != NULL)
- decoder(ndo, cp, length - OF_HEADER_FIXLEN, type);
- else
- ND_TCHECK_LEN(cp, length - OF_HEADER_FIXLEN);
+ of_message_print(ndo, cp, length - OF_HEADER_FIXLEN, mti);
if (length - OF_HEADER_FIXLEN > len)
break;
OF_FWD(length - OF_HEADER_FIXLEN);
projects / tcpdump / commitdiff
