From: Ben Pfaff Date: Tue, 12 Jun 2012 07:27:35 +0000 (-0700) Subject: ofp-util: Work on decoding OF1.1 flow_mods. X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bce80ff228223ec9dfde8d348822e264cf99487e;p=openvswitch ofp-util: Work on decoding OF1.1 flow_mods. Signed-off-by: Ben Pfaff Tested-by: Simon Horman Reviewed-by: Simon Horman --- v3->v4: Builds and passes unit tests. Somewhat incomplete, I think. --- diff --git a/include/openflow/openflow-1.1.h b/include/openflow/openflow-1.1.h index 7c78c639..696c3ec4 100644 --- a/include/openflow/openflow-1.1.h +++ b/include/openflow/openflow-1.1.h @@ -467,8 +467,8 @@ struct ofp11_flow_mod { indicates no restriction. */ ovs_be16 flags; /* One of OFPFF_*. */ uint8_t pad[2]; - /* Open Flow version specific match */ - /* struct ofp_instruction instructions[0]; Instruction set */ + /* Followed by an ofp11_match structure. */ + /* Followed by an instruction set. */ }; OFP_ASSERT(sizeof(struct ofp11_flow_mod) == 40); @@ -528,7 +528,7 @@ struct ofp11_stats_msg { ovs_be16 type; /* One of the OFPST_* constants. */ ovs_be16 flags; /* OFPSF_REQ_* flags (none yet defined). */ uint8_t pad[4]; - /* uint8_t body[0]; Body of the request. */ + /* Followed by the body of the request. */ }; OFP_ASSERT(sizeof(struct ofp11_stats_msg) == 16); @@ -560,9 +560,9 @@ struct ofp11_flow_stats_request { ovs_be64 cookie_mask; /* Mask used to restrict the cookie bits that must match. A value of 0 indicates no restriction. */ - struct ofp11_match match; /* Fields to match. */ + /* Followed by an ofp11_match structure. */ }; -OFP_ASSERT(sizeof(struct ofp11_flow_stats_request) == 120); +OFP_ASSERT(sizeof(struct ofp11_flow_stats_request) == 32); /* Body of reply to OFPST_FLOW request. */ struct ofp11_flow_stats { @@ -743,8 +743,8 @@ struct ofp11_flow_removed { uint8_t pad2[2]; /* Align to 64-bits. */ ovs_be64 packet_count; ovs_be64 byte_count; - struct ofp11_match match; /* Description of fields. */ + /* Followed by an ofp11_match structure. */ }; -OFP_ASSERT(sizeof(struct ofp11_flow_removed) == 128); +OFP_ASSERT(sizeof(struct ofp11_flow_removed) == 40); #endif /* openflow/openflow-1.1.h */ diff --git a/include/openflow/openflow-common.h b/include/openflow/openflow-common.h index 4ab37804..202ba1ed 100644 --- a/include/openflow/openflow-common.h +++ b/include/openflow/openflow-common.h @@ -322,4 +322,14 @@ enum ofp_match_type { OFPMT_OXM = 1, /* OpenFlow Extensible Match */ }; +/* Group numbering. Groups can use any number up to OFPG_MAX. */ +enum ofp_group { + /* Last usable group number. */ + OFPG_MAX = 0xffffff00, + + /* Fake groups. */ + OFPG_ALL = 0xfffffffc, /* All groups, for group delete commands. */ + OFPG_ANY = 0xffffffff /* Wildcard, for flow stats requests. */ +}; + #endif /* openflow/openflow-common.h */ diff --git a/lib/ofp-errors.h b/lib/ofp-errors.h index 1af70da9..76b65746 100644 --- a/lib/ofp-errors.h +++ b/lib/ofp-errors.h @@ -339,6 +339,9 @@ enum ofperr { * extension is enabled. */ OFPERR_NXFMFC_BAD_TABLE_ID, + /* NX1.0+(3,258). 'out_group' specified but groups not yet supported. */ + OFPERR_NXFMFC_GROUPS_NOT_SUPPORTED, + /* ## ---------------------- ## */ /* ## OFPET_GROUP_MOD_FAILED ## */ /* ## ---------------------- ## */ diff --git a/lib/ofp-util.c b/lib/ofp-util.c index 92d3fe46..8d0f9938 100644 --- a/lib/ofp-util.c +++ b/lib/ofp-util.c @@ -265,6 +265,31 @@ ofputil_cls_rule_to_ofp10_match(const struct cls_rule *rule, memset(match->pad2, '\0', sizeof match->pad2); } +enum ofperr +ofputil_pull_ofp11_match(struct ofpbuf *buf, unsigned int priority, + struct cls_rule *rule) +{ + struct ofp11_match_header *omh; + struct ofp11_match *om; + + if (buf->size < sizeof(struct ofp11_match_header)) { + return OFPERR_OFPBMC_BAD_LEN; + } + + omh = buf->data; + switch (ntohs(omh->type)) { + case OFPMT_STANDARD: + if (omh->length != htons(sizeof *om) || buf->size < sizeof *om) { + return OFPERR_OFPBMC_BAD_LEN; + } + om = ofpbuf_pull(buf, sizeof *om); + return ofputil_cls_rule_from_ofp11_match(om, priority, rule); + + default: + return OFPERR_OFPBMC_BAD_TYPE; + } +} + /* Converts the ofp11_match in 'match' into a cls_rule in 'rule', with the * given 'priority'. Returns 0 if successful, otherwise an OFPERR_* value. */ enum ofperr @@ -1102,87 +1127,131 @@ ofputil_decode_flow_mod(struct ofputil_flow_mod *fm, ofpbuf_use_const(&b, oh, ntohs(oh->length)); raw = ofpraw_pull_assert(&b); - if (raw == OFPRAW_OFPT10_FLOW_MOD) { + if (raw == OFPRAW_OFPT11_FLOW_MOD) { /* Standard OpenFlow 1.1 flow_mod. */ - const struct ofp10_flow_mod *ofm; - uint16_t priority; + const struct ofp11_flow_mod *ofm; enum ofperr error; - /* Get the ofp_flow_mod. */ ofm = ofpbuf_pull(&b, sizeof *ofm); - /* Set priority based on original wildcards. Normally we'd allow - * ofputil_cls_rule_from_match() to do this for us, but - * ofputil_normalize_rule() can put wildcards where the original flow - * didn't have them. */ - priority = ntohs(ofm->priority); - if (!(ofm->match.wildcards & htonl(OFPFW10_ALL))) { - priority = UINT16_MAX; + error = ofputil_pull_ofp11_match(&b, ntohs(ofm->priority), &fm->cr); + if (error) { + return error; } - /* Translate the rule. */ - ofputil_cls_rule_from_ofp10_match(&ofm->match, priority, &fm->cr); - ofputil_normalize_rule(&fm->cr); - - /* Now get the actions. */ - error = ofpacts_pull_openflow10(&b, b.size, ofpacts); + error = ofpacts_pull_openflow11_instructions(&b, b.size, ofpacts); if (error) { return error; } /* Translate the message. */ - command = ntohs(ofm->command); - fm->cookie = htonll(0); - fm->cookie_mask = htonll(0); - fm->new_cookie = ofm->cookie; + if (ofm->command == OFPFC_ADD) { + fm->cookie = htonll(0); + fm->cookie_mask = htonll(0); + fm->new_cookie = ofm->cookie; + } else { + /* XXX */ + fm->cookie = ofm->cookie; + fm->cookie_mask = ofm->cookie_mask; + fm->new_cookie = htonll(UINT64_MAX); + } + fm->command = ofm->command; + fm->table_id = ofm->table_id; fm->idle_timeout = ntohs(ofm->idle_timeout); fm->hard_timeout = ntohs(ofm->hard_timeout); fm->buffer_id = ntohl(ofm->buffer_id); - fm->out_port = ntohs(ofm->out_port); - fm->flags = ntohs(ofm->flags); - } else if (raw == OFPRAW_NXT_FLOW_MOD) { - /* Nicira extended flow_mod. */ - const struct nx_flow_mod *nfm; - enum ofperr error; - - /* Dissect the message. */ - nfm = ofpbuf_pull(&b, sizeof *nfm); - error = nx_pull_match(&b, ntohs(nfm->match_len), ntohs(nfm->priority), - &fm->cr, &fm->cookie, &fm->cookie_mask); + error = ofputil_port_from_ofp11(ofm->out_port, &fm->out_port); if (error) { return error; } - error = ofpacts_pull_openflow10(&b, b.size, ofpacts); - if (error) { - return error; + if (ofm->out_group != htonl(OFPG_ANY)) { + return OFPERR_NXFMFC_GROUPS_NOT_SUPPORTED; } - - /* Translate the message. */ - command = ntohs(nfm->command); - if ((command & 0xff) == OFPFC_ADD && fm->cookie_mask) { - /* Flow additions may only set a new cookie, not match an - * existing cookie. */ - return OFPERR_NXBRC_NXM_INVALID; - } - fm->new_cookie = nfm->cookie; - fm->idle_timeout = ntohs(nfm->idle_timeout); - fm->hard_timeout = ntohs(nfm->hard_timeout); - fm->buffer_id = ntohl(nfm->buffer_id); - fm->out_port = ntohs(nfm->out_port); - fm->flags = ntohs(nfm->flags); + fm->flags = ntohs(ofm->flags); } else { - NOT_REACHED(); + if (raw == OFPRAW_OFPT10_FLOW_MOD) { + /* Standard OpenFlow 1.0 flow_mod. */ + const struct ofp10_flow_mod *ofm; + uint16_t priority; + enum ofperr error; + + /* Get the ofp10_flow_mod. */ + ofm = ofpbuf_pull(&b, sizeof *ofm); + + /* Set priority based on original wildcards. Normally we'd allow + * ofputil_cls_rule_from_match() to do this for us, but + * ofputil_normalize_rule() can put wildcards where the original + * flow didn't have them. */ + priority = ntohs(ofm->priority); + if (!(ofm->match.wildcards & htonl(OFPFW10_ALL))) { + priority = UINT16_MAX; + } + + /* Translate the rule. */ + ofputil_cls_rule_from_ofp10_match(&ofm->match, priority, &fm->cr); + ofputil_normalize_rule(&fm->cr); + + /* Now get the actions. */ + error = ofpacts_pull_openflow10(&b, b.size, ofpacts); + if (error) { + return error; + } + + /* Translate the message. */ + command = ntohs(ofm->command); + fm->cookie = htonll(0); + fm->cookie_mask = htonll(0); + fm->new_cookie = ofm->cookie; + fm->idle_timeout = ntohs(ofm->idle_timeout); + fm->hard_timeout = ntohs(ofm->hard_timeout); + fm->buffer_id = ntohl(ofm->buffer_id); + fm->out_port = ntohs(ofm->out_port); + fm->flags = ntohs(ofm->flags); + } else if (raw == OFPRAW_NXT_FLOW_MOD) { + /* Nicira extended flow_mod. */ + const struct nx_flow_mod *nfm; + enum ofperr error; + + /* Dissect the message. */ + nfm = ofpbuf_pull(&b, sizeof *nfm); + error = nx_pull_match(&b, ntohs(nfm->match_len), ntohs(nfm->priority), + &fm->cr, &fm->cookie, &fm->cookie_mask); + if (error) { + return error; + } + error = ofpacts_pull_openflow10(&b, b.size, ofpacts); + if (error) { + return error; + } + + /* Translate the message. */ + command = ntohs(nfm->command); + if ((command & 0xff) == OFPFC_ADD && fm->cookie_mask) { + /* Flow additions may only set a new cookie, not match an + * existing cookie. */ + return OFPERR_NXBRC_NXM_INVALID; + } + fm->new_cookie = nfm->cookie; + fm->idle_timeout = ntohs(nfm->idle_timeout); + fm->hard_timeout = ntohs(nfm->hard_timeout); + fm->buffer_id = ntohl(nfm->buffer_id); + fm->out_port = ntohs(nfm->out_port); + fm->flags = ntohs(nfm->flags); + } else { + NOT_REACHED(); + } + + if (protocol & OFPUTIL_P_TID) { + fm->command = command & 0xff; + fm->table_id = command >> 8; + } else { + fm->command = command; + fm->table_id = 0xff; + } } fm->ofpacts = ofpacts->data; fm->ofpacts_len = ofpacts->size; - if (protocol & OFPUTIL_P_TID) { - fm->command = command & 0xff; - fm->table_id = command >> 8; - } else { - fm->command = command; - fm->table_id = 0xff; - } return 0; } diff --git a/lib/ofp-util.h b/lib/ofp-util.h index 54bec75f..c87d6488 100644 --- a/lib/ofp-util.h +++ b/lib/ofp-util.h @@ -117,6 +117,8 @@ void ofputil_cls_rule_to_ofp10_match(const struct cls_rule *, struct ofp10_match *); /* Work with ofp11_match. */ +enum ofperr ofputil_pull_ofp11_match(struct ofpbuf *, unsigned int priority, + struct cls_rule *); enum ofperr ofputil_cls_rule_from_ofp11_match(const struct ofp11_match *, unsigned int priority, struct cls_rule *);