/*
- * Copyright (c) 2008, 2009, 2010, 2011 Nicira Networks.
+ * Copyright (c) 2008, 2009, 2010, 2011, 2012 Nicira Networks.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
/* Basic decoding and length validation of OpenFlow messages. */
enum ofputil_msg_code {
- OFPUTIL_INVALID,
+ OFPUTIL_MSG_INVALID,
/* OFPT_* messages. */
OFPUTIL_OFPT_HELLO,
OFPUTIL_NXT_FLOW_MOD_TABLE_ID,
OFPUTIL_NXT_FLOW_MOD,
OFPUTIL_NXT_FLOW_REMOVED,
+ OFPUTIL_NXT_SET_PACKET_IN_FORMAT,
+ OFPUTIL_NXT_PACKET_IN,
+ OFPUTIL_NXT_FLOW_AGE,
+ OFPUTIL_NXT_SET_ASYNC_CONFIG,
/* NXST_* stat requests. */
OFPUTIL_NXST_FLOW_REQUEST,
};
struct ofputil_msg_type;
-int ofputil_decode_msg_type(const struct ofp_header *,
- const struct ofputil_msg_type **);
+enum ofperr ofputil_decode_msg_type(const struct ofp_header *,
+ const struct ofputil_msg_type **);
+enum ofperr ofputil_decode_msg_type_partial(const struct ofp_header *,
+ size_t length,
+ const struct ofputil_msg_type **);
enum ofputil_msg_code ofputil_msg_type_code(const struct ofputil_msg_type *);
const char *ofputil_msg_type_name(const struct ofputil_msg_type *);
+/* Port numbers. */
+enum ofperr ofputil_check_output_port(uint16_t ofp_port, int max_ports);
+bool ofputil_port_from_string(const char *, uint16_t *port);
+void ofputil_format_port(uint16_t port, struct ds *);
+
/* Converting OFPFW_NW_SRC_MASK and OFPFW_NW_DST_MASK wildcard bit counts to
* and from IP bitmasks. */
ovs_be32 ofputil_wcbits_to_netmask(int wcbits);
int ofputil_netmask_to_wcbits(ovs_be32 netmask);
/* Work with OpenFlow 1.0 ofp_match. */
+void ofputil_wildcard_from_openflow(uint32_t ofpfw, struct flow_wildcards *);
void ofputil_cls_rule_from_match(const struct ofp_match *,
unsigned int priority, struct cls_rule *);
void ofputil_normalize_rule(struct cls_rule *, enum nx_flow_format);
struct ofpbuf *ofputil_make_set_flow_format(enum nx_flow_format);
+/* PACKET_IN. */
+bool ofputil_packet_in_format_is_valid(enum nx_packet_in_format);
+int ofputil_packet_in_format_from_string(const char *);
+const char *ofputil_packet_in_format_to_string(enum nx_packet_in_format);
+struct ofpbuf *ofputil_make_set_packet_in_format(enum nx_packet_in_format);
+
/* NXT_FLOW_MOD_TABLE_ID extension. */
struct ofpbuf *ofputil_make_flow_mod_table_id(bool flow_mod_table_id);
/* Flow format independent flow_mod. */
-struct flow_mod {
+struct ofputil_flow_mod {
struct cls_rule cr;
ovs_be64 cookie;
+ ovs_be64 cookie_mask;
uint8_t table_id;
uint16_t command;
uint16_t idle_timeout;
size_t n_actions;
};
-int ofputil_decode_flow_mod(struct flow_mod *, const struct ofp_header *,
- bool flow_mod_table_id);
-struct ofpbuf *ofputil_encode_flow_mod(const struct flow_mod *,
+enum ofperr ofputil_decode_flow_mod(struct ofputil_flow_mod *,
+ const struct ofp_header *,
+ bool flow_mod_table_id);
+struct ofpbuf *ofputil_encode_flow_mod(const struct ofputil_flow_mod *,
enum nx_flow_format,
bool flow_mod_table_id);
/* Flow stats or aggregate stats request, independent of flow format. */
-struct flow_stats_request {
+struct ofputil_flow_stats_request {
bool aggregate; /* Aggregate results? */
struct cls_rule match;
+ ovs_be64 cookie;
+ ovs_be64 cookie_mask;
uint16_t out_port;
uint8_t table_id;
};
-int ofputil_decode_flow_stats_request(struct flow_stats_request *,
- const struct ofp_header *);
+enum ofperr ofputil_decode_flow_stats_request(
+ struct ofputil_flow_stats_request *, const struct ofp_header *);
struct ofpbuf *ofputil_encode_flow_stats_request(
- const struct flow_stats_request *, enum nx_flow_format);
+ const struct ofputil_flow_stats_request *, enum nx_flow_format);
/* Flow stats reply, independent of flow format. */
struct ofputil_flow_stats {
uint32_t duration_nsec;
uint16_t idle_timeout;
uint16_t hard_timeout;
- uint64_t packet_count;
- uint64_t byte_count;
+ int idle_age; /* Seconds since last packet, -1 if unknown. */
+ int hard_age; /* Seconds since last change, -1 if unknown. */
+ uint64_t packet_count; /* Packet count, UINT64_MAX if unknown. */
+ uint64_t byte_count; /* Byte count, UINT64_MAX if unknown. */
union ofp_action *actions;
size_t n_actions;
};
int ofputil_decode_flow_stats_reply(struct ofputil_flow_stats *,
- struct ofpbuf *msg);
+ struct ofpbuf *msg,
+ bool flow_age_extension);
+void ofputil_append_flow_stats_reply(const struct ofputil_flow_stats *,
+ struct list *replies);
+
+/* Aggregate stats reply, independent of flow format. */
+struct ofputil_aggregate_stats {
+ uint64_t packet_count; /* Packet count, UINT64_MAX if unknown. */
+ uint64_t byte_count; /* Byte count, UINT64_MAX if unknown. */
+ uint32_t flow_count;
+};
+
+struct ofpbuf *ofputil_encode_aggregate_stats_reply(
+ const struct ofputil_aggregate_stats *stats,
+ const struct ofp_stats_msg *request);
/* Flow removed message, independent of flow format. */
struct ofputil_flow_removed {
uint32_t duration_sec;
uint32_t duration_nsec;
uint16_t idle_timeout;
- uint64_t packet_count;
- uint64_t byte_count;
+ uint64_t packet_count; /* Packet count, UINT64_MAX if unknown. */
+ uint64_t byte_count; /* Byte count, UINT64_MAX if unknown. */
};
-int ofputil_decode_flow_removed(struct ofputil_flow_removed *,
- const struct ofp_header *);
+enum ofperr ofputil_decode_flow_removed(struct ofputil_flow_removed *,
+ const struct ofp_header *);
struct ofpbuf *ofputil_encode_flow_removed(const struct ofputil_flow_removed *,
enum nx_flow_format);
/* Abstract packet-in message. */
struct ofputil_packet_in {
- struct ofpbuf *packet;
- uint16_t in_port;
- uint8_t reason; /* One of OFPR_*. */
+ const void *packet;
+ size_t packet_len;
+
+ enum ofp_packet_in_reason reason; /* One of OFPRR_*. */
+ uint8_t table_id;
+ ovs_be64 cookie;
uint32_t buffer_id;
int send_len;
+ uint16_t total_len; /* Full length of frame. */
+
+ struct flow_metadata fmd; /* Metadata at creation time. */
};
+int ofputil_decode_packet_in(struct ofputil_packet_in *,
+ const struct ofp_header *);
struct ofpbuf *ofputil_encode_packet_in(const struct ofputil_packet_in *,
- struct ofpbuf *rw_packet);
+ enum nx_packet_in_format);
+int ofputil_decode_packet_in(struct ofputil_packet_in *pi,
+ const struct ofp_header *oh);
+
+/* Abstract packet-out message. */
+struct ofputil_packet_out {
+ const void *packet; /* Packet data, if buffer_id == UINT32_MAX. */
+ size_t packet_len; /* Length of packet data in bytes. */
+ uint32_t buffer_id; /* Buffer id or UINT32_MAX if no buffer. */
+ uint16_t in_port; /* Packet's input port or OFPP_NONE. */
+ union ofp_action *actions; /* Actions. */
+ size_t n_actions; /* Number of elements in 'actions' array. */
+};
+
+enum ofperr ofputil_decode_packet_out(struct ofputil_packet_out *,
+ const struct ofp_packet_out *);
+struct ofpbuf *ofputil_encode_packet_out(const struct ofputil_packet_out *);
/* OpenFlow protocol utility functions. */
void *make_openflow(size_t openflow_len, uint8_t type, struct ofpbuf **);
void update_openflow_length(struct ofpbuf *);
-void *ofputil_make_stats_request(size_t body_len, uint16_t type,
- struct ofpbuf **);
-void *ofputil_make_nxstats_request(size_t openflow_len, uint32_t subtype,
- struct ofpbuf **);
+void *ofputil_make_stats_request(size_t openflow_len, uint16_t type,
+ uint32_t subtype, struct ofpbuf **);
+void *ofputil_make_stats_reply(size_t openflow_len,
+ const struct ofp_stats_msg *request,
+ struct ofpbuf **);
+
+void ofputil_start_stats_reply(const struct ofp_stats_msg *request,
+ struct list *);
+struct ofpbuf *ofputil_reserve_stats_reply(size_t len, struct list *);
+void *ofputil_append_stats_reply(size_t len, struct list *);
const void *ofputil_stats_body(const struct ofp_header *);
size_t ofputil_stats_body_len(const struct ofp_header *);
struct ofpbuf *make_packet_in(uint32_t buffer_id, uint16_t in_port,
uint8_t reason,
const struct ofpbuf *payload, int max_send_len);
-struct ofpbuf *make_packet_out(const struct ofpbuf *packet, uint32_t buffer_id,
- uint16_t in_port,
- const struct ofp_action_header *,
- size_t n_actions);
-struct ofpbuf *make_buffered_packet_out(uint32_t buffer_id,
- uint16_t in_port, uint16_t out_port);
-struct ofpbuf *make_unbuffered_packet_out(const struct ofpbuf *packet,
- uint16_t in_port, uint16_t out_port);
struct ofpbuf *make_echo_request(void);
struct ofpbuf *make_echo_reply(const struct ofp_header *rq);
+
+struct ofpbuf *ofputil_encode_barrier_request(void);
+
+const char *ofputil_frag_handling_to_string(enum ofp_config_flags);
+bool ofputil_frag_handling_from_string(const char *, enum ofp_config_flags *);
\f
/* Actions. */
-#define OFP_ACTION_ALIGN 8 /* Alignment of ofp_actions. */
+/* The type of an action.
+ *
+ * For each implemented OFPAT_* and NXAST_* action type, there is a
+ * corresponding constant prefixed with OFPUTIL_, e.g.:
+ *
+ * OFPUTIL_OFPAT_OUTPUT
+ * OFPUTIL_OFPAT_SET_VLAN_VID
+ * OFPUTIL_OFPAT_SET_VLAN_PCP
+ * OFPUTIL_OFPAT_STRIP_VLAN
+ * OFPUTIL_OFPAT_SET_DL_SRC
+ * OFPUTIL_OFPAT_SET_DL_DST
+ * OFPUTIL_OFPAT_SET_NW_SRC
+ * OFPUTIL_OFPAT_SET_NW_DST
+ * OFPUTIL_OFPAT_SET_NW_TOS
+ * OFPUTIL_OFPAT_SET_TP_SRC
+ * OFPUTIL_OFPAT_SET_TP_DST
+ * OFPUTIL_OFPAT_ENQUEUE
+ * OFPUTIL_NXAST_RESUBMIT
+ * OFPUTIL_NXAST_SET_TUNNEL
+ * OFPUTIL_NXAST_SET_QUEUE
+ * OFPUTIL_NXAST_POP_QUEUE
+ * OFPUTIL_NXAST_REG_MOVE
+ * OFPUTIL_NXAST_REG_LOAD
+ * OFPUTIL_NXAST_NOTE
+ * OFPUTIL_NXAST_SET_TUNNEL64
+ * OFPUTIL_NXAST_MULTIPATH
+ * OFPUTIL_NXAST_AUTOPATH
+ * OFPUTIL_NXAST_BUNDLE
+ * OFPUTIL_NXAST_BUNDLE_LOAD
+ * OFPUTIL_NXAST_RESUBMIT_TABLE
+ * OFPUTIL_NXAST_OUTPUT_REG
+ *
+ * (The above list helps developers who want to "grep" for these definitions.)
+ */
+enum ofputil_action_code {
+#define OFPAT_ACTION(ENUM, STRUCT, NAME) OFPUTIL_##ENUM,
+#define NXAST_ACTION(ENUM, STRUCT, EXTENSIBLE, NAME) OFPUTIL_##ENUM,
+#include "ofp-util.def"
+};
-struct actions_iterator {
- const union ofp_action *pos, *end;
+/* The number of values of "enum ofputil_action_code". */
+enum {
+#define OFPAT_ACTION(ENUM, STRUCT, NAME) + 1
+#define NXAST_ACTION(ENUM, STRUCT, EXTENSIBLE, NAME) + 1
+ OFPUTIL_N_ACTIONS = 0
+#include "ofp-util.def"
};
-const union ofp_action *actions_first(struct actions_iterator *,
- const union ofp_action *,
- size_t n_actions);
-const union ofp_action *actions_next(struct actions_iterator *);
-int validate_actions(const union ofp_action *, size_t n_actions,
- const struct flow *, int max_ports);
-bool action_outputs_to_port(const union ofp_action *, ovs_be16 port);
+int ofputil_decode_action(const union ofp_action *);
+enum ofputil_action_code ofputil_decode_action_unsafe(
+ const union ofp_action *);
-int ofputil_pull_actions(struct ofpbuf *, unsigned int actions_len,
- union ofp_action **, size_t *);
-\f
-/* OpenFlow vendors.
- *
- * These functions map OpenFlow 32-bit vendor IDs (as used in struct
- * ofp_vendor_header) into 4-bit values to embed in an "int". The 4-bit values
- * are only used internally in Open vSwitch and never appear on the wire, so
- * particular codes used are not important.
- */
+int ofputil_action_code_from_name(const char *);
-/* Vendor error numbers currently used in Open vSwitch. */
-#define OFPUTIL_VENDORS \
- /* vendor name vendor value */ \
- OFPUTIL_VENDOR(OFPUTIL_VENDOR_OPENFLOW, 0x00000000) \
- OFPUTIL_VENDOR(OFPUTIL_VENDOR_NICIRA, NX_VENDOR_ID)
-
-/* OFPUTIL_VENDOR_* definitions. */
-enum ofputil_vendor_codes {
-#define OFPUTIL_VENDOR(NAME, VENDOR_ID) NAME,
- OFPUTIL_VENDORS
- OFPUTIL_N_VENDORS
-#undef OFPUTIL_VENDOR
-};
-\f
-/* Error codes.
- *
- * We embed system errno values and OpenFlow standard and vendor extension
- * error codes into a single 31-bit space using the following encoding.
- * (Bit 31 is unused and assumed 0 to avoid negative "int" values.)
- *
- * 30 0
- * +------------------------------------------------------+
- * | 0 | success
- * +------------------------------------------------------+
- *
- * 30 29 0
- * +--+---------------------------------------------------+
- * | 0| errno value | errno value
- * +--+---------------------------------------------------+
- *
- * 30 29 26 25 16 15 0
- * +--+-------+----------------+--------------------------+
- * | 1| 0 | type | code | standard OpenFlow
- * +--+-------+----------------+--------------------------+ error
+void *ofputil_put_action(enum ofputil_action_code, struct ofpbuf *buf);
+
+/* For each OpenFlow action <ENUM> that has a corresponding action structure
+ * struct <STRUCT>, this defines two functions:
*
- * 30 29 26 25 16 15 0
- * +--+-------+----------------+--------------------------+ Nicira
- * | 1| vendor| type | code | NXET_VENDOR
- * +--+-------+----------------+--------------------------+ error extension
+ * void ofputil_init_<ENUM>(struct <STRUCT> *action);
*
- * C and POSIX say that errno values are positive. We assume that they are
- * less than 2**29. They are actually less than 65536 on at least Linux,
- * FreeBSD, OpenBSD, and Windows.
+ * Initializes the parts of 'action' that identify it as having type <ENUM>
+ * and length 'sizeof *action' and zeros the rest. For actions that have
+ * variable length, the length used and cleared is that of struct <STRUCT>.
*
- * The 'vendor' field holds one of the OFPUTIL_VENDOR_* codes defined above.
- * It must be nonzero.
+ * struct <STRUCT> *ofputil_put_<ENUM>(struct ofpbuf *buf);
*
- * Negative values are not defined.
+ * Appends a new 'action', of length 'sizeof(struct <STRUCT>)', to 'buf',
+ * initializes it with ofputil_init_<ENUM>(), and returns it.
*/
+#define OFPAT_ACTION(ENUM, STRUCT, NAME) \
+ void ofputil_init_##ENUM(struct STRUCT *); \
+ struct STRUCT *ofputil_put_##ENUM(struct ofpbuf *);
+#define NXAST_ACTION(ENUM, STRUCT, EXTENSIBLE, NAME) \
+ void ofputil_init_##ENUM(struct STRUCT *); \
+ struct STRUCT *ofputil_put_##ENUM(struct ofpbuf *);
+#include "ofp-util.def"
-/* Currently 4 bits are allocated to the "vendor" field. Make sure that all
- * the vendor codes can fit. */
-BUILD_ASSERT_DECL(OFPUTIL_N_VENDORS <= 16);
-
-/* These are macro versions of the functions defined below. The macro versions
- * are intended for use in contexts where function calls are not allowed,
- * e.g. static initializers and case labels. */
-#define OFP_MKERR(TYPE, CODE) ((1 << 30) | ((TYPE) << 16) | (CODE))
-#define OFP_MKERR_VENDOR(VENDOR, TYPE, CODE) \
- ((1 << 30) | ((VENDOR) << 26) | ((TYPE) << 16) | (CODE))
-#define OFP_MKERR_NICIRA(TYPE, CODE) \
- OFP_MKERR_VENDOR(OFPUTIL_VENDOR_NICIRA, TYPE, CODE)
-
-/* Returns the standard OpenFlow error with the specified 'type' and 'code' as
- * an integer. */
-static inline int
-ofp_mkerr(uint16_t type, uint16_t code)
-{
- return OFP_MKERR(type, code);
-}
-
-/* Returns the OpenFlow vendor error with the specified 'vendor', 'type', and
- * 'code' as an integer. 'vendor' must be an OFPUTIL_VENDOR_* constant. */
-static inline int
-ofp_mkerr_vendor(uint8_t vendor, uint16_t type, uint16_t code)
-{
- assert(vendor < OFPUTIL_N_VENDORS);
- return OFP_MKERR_VENDOR(vendor, type, code);
-}
-
-/* Returns the OpenFlow vendor error with Nicira as vendor, with the specific
- * 'type' and 'code', as an integer. */
-static inline int
-ofp_mkerr_nicira(uint16_t type, uint16_t code)
-{
- return OFP_MKERR_NICIRA(type, code);
-}
+#define OFP_ACTION_ALIGN 8 /* Alignment of ofp_actions. */
-/* Returns true if 'error' encodes an OpenFlow standard or vendor extension
- * error codes as documented above. */
-static inline bool
-is_ofp_error(int error)
+static inline union ofp_action *
+ofputil_action_next(const union ofp_action *a)
{
- return (error & (1 << 30)) != 0;
+ return ((union ofp_action *) (void *)
+ ((uint8_t *) a + ntohs(a->header.len)));
}
-/* Returns true if 'error' appears to be a system errno value. */
static inline bool
-is_errno(int error)
-{
- return !is_ofp_error(error);
-}
-
-/* Returns the "vendor" part of the OpenFlow error code 'error' (which must be
- * in the format explained above). This is normally one of the
- * OFPUTIL_VENDOR_* constants. Returns OFPUTIL_VENDOR_OPENFLOW (0) for a
- * standard OpenFlow error. */
-static inline uint8_t
-get_ofp_err_vendor(int error)
+ofputil_action_is_valid(const union ofp_action *a, size_t n_actions)
{
- return (error >> 26) & 0xf;
+ uint16_t len = ntohs(a->header.len);
+ return (!(len % OFP_ACTION_ALIGN)
+ && len >= sizeof *a
+ && len / sizeof *a <= n_actions);
}
-/* Returns the "type" part of the OpenFlow error code 'error' (which must be in
- * the format explained above). */
-static inline uint16_t
-get_ofp_err_type(int error)
-{
- return (error >> 16) & 0x3ff;
-}
+/* This macro is careful to check for actions with bad lengths. */
+#define OFPUTIL_ACTION_FOR_EACH(ITER, LEFT, ACTIONS, N_ACTIONS) \
+ for ((ITER) = (ACTIONS), (LEFT) = (N_ACTIONS); \
+ (LEFT) > 0 && ofputil_action_is_valid(ITER, LEFT); \
+ ((LEFT) -= ntohs((ITER)->header.len) / sizeof(union ofp_action), \
+ (ITER) = ofputil_action_next(ITER)))
+
+/* This macro does not check for actions with bad lengths. It should only be
+ * used with actions from trusted sources or with actions that have already
+ * been validated (e.g. with OFPUTIL_ACTION_FOR_EACH). */
+#define OFPUTIL_ACTION_FOR_EACH_UNSAFE(ITER, LEFT, ACTIONS, N_ACTIONS) \
+ for ((ITER) = (ACTIONS), (LEFT) = (N_ACTIONS); \
+ (LEFT) > 0; \
+ ((LEFT) -= ntohs((ITER)->header.len) / sizeof(union ofp_action), \
+ (ITER) = ofputil_action_next(ITER)))
+
+enum ofperr validate_actions(const union ofp_action *, size_t n_actions,
+ const struct flow *, int max_ports);
+bool action_outputs_to_port(const union ofp_action *, ovs_be16 port);
-/* Returns the "code" part of the OpenFlow error code 'error' (which must be in
- * the format explained above). */
-static inline uint16_t
-get_ofp_err_code(int error)
-{
- return error & 0xffff;
-}
+enum ofperr ofputil_pull_actions(struct ofpbuf *, unsigned int actions_len,
+ union ofp_action **, size_t *);
-struct ofpbuf *ofputil_encode_error_msg(int error, const struct ofp_header *);
-int ofputil_decode_error_msg(const struct ofp_header *, size_t *payload_ofs);
+bool ofputil_actions_equal(const union ofp_action *a, size_t n_a,
+ const union ofp_action *b, size_t n_b);
+union ofp_action *ofputil_actions_clone(const union ofp_action *, size_t n);
-/* String versions of errors. */
-void ofputil_format_error(struct ds *, int error);
-char *ofputil_error_to_string(int error);
+/* Handy utility for parsing flows and actions. */
+bool ofputil_parse_key_value(char **stringp, char **keyp, char **valuep);
#endif /* ofp-util.h */
git://git.onelab.eu / sliver-openvswitch.git / blobdiff