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https://gitlab.nic.cz/labs/bird.git
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Big code cleanup
This commit is contained in:
Vojtech Vilimek
parent
b3f8b3124d
commit
4c29a3911e
@ -8,13 +8,12 @@
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* Can be freely distributed and used under the terms of the GNU GPL.
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*/
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/* BGP_MIB states see enum BGP_INTERNAL_STATES */
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#include "snmp.h"
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#include "snmp_utils.h"
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#include "subagent.h"
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#include "bgp_mib.h"
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/* BGP_MIB states see enum BGP_INTERNAL_STATES */
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static const char * const debug_bgp_states[] UNUSED = {
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[BGP_INTERNAL_INVALID] = "BGP_INTERNAL_INVALID",
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[BGP_INTERNAL_BGP] = "BGP_INTERNAL_BGP",
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@ -57,9 +56,8 @@ snmp_bgp_register(struct snmp_proto *p)
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u32 bgp_mib_prefix[] = {1, 15, 1};
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{ /* registering whole BGP4-MIB subtree */
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//snmp_log("snmp_proto %p (%p)", p, p->p.pool);
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{
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/* Register the whole BGP4-MIB::bgp root tree node */
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struct snmp_register *registering = snmp_register_create(p, SNMP_BGP4_MIB);
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struct oid *oid = mb_alloc(p->p.pool, snmp_oid_sizeof(2));
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@ -72,89 +70,11 @@ snmp_bgp_register(struct snmp_proto *p)
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add_tail(&p->register_queue, ®istering->n);
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p->register_to_ack++;
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/* snmp_register(struct snmp_proto *p, struct oid *oid, uint index, uint len, u8 is_instance) */
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/* Function declartion:
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* snmp_register(struct snmp_proto *p, struct oid *oid, uint index, uint len, u8 is_instance);
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*/
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snmp_register(p, oid, 0, 1, 0);
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}
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/*
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// TODO squash bgpVersion and bgpLocalAs to one PDU
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{ / * registering BGP4-MIB::bgpVersion * /
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//snmp_log("snmp_proto %p (%p)", p, p->p.pool);
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struct snmp_register *registering = snmp_register_create(p, SNMP_BGP4_MIB);
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struct oid *oid = mb_alloc(p->p.pool, snmp_oid_sizeof(3));
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put_u8(&oid->n_subid, 3);
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put_u8(&oid->prefix, 2);
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memcpy(oid->ids, bgp_mib_prefix, 3 * sizeof(u32));
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registering->oid = oid;
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add_tail(&p->register_queue, ®istering->n);
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p->register_to_ack++;
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snmp_register(p, oid, 0, 1);
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}
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{ / * registering BGP4-MIB::bgpLocalAs * /
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struct snmp_register *registering = snmp_register_create(p, SNMP_BGP4_MIB);
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struct oid *oid = mb_alloc(p->p.pool, snmp_oid_sizeof(3));
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put_u8(&oid->n_subid, 3);
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put_u8(&oid->prefix, 2);
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memcpy(oid->ids, bgp_mib_prefix, 2 * sizeof(u32));
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STORE(oid->ids[2], 2);
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registering->oid = oid;
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add_tail(&p->register_queue, ®istering->n);
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p->register_to_ack++;
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snmp_register(p, oid, 0, 1);
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}
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{ / * registering BGP4-MIB::bgpPeerTable * /
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struct snmp_register *registering = snmp_register_create(p, SNMP_BGP4_MIB);
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struct oid *oid = mb_alloc(p->p.pool, snmp_oid_sizeof(3));
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put_u8(&oid->n_subid, 3);
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put_u8(&oid->prefix, 2);
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memcpy(oid->ids, bgp_mib_prefix, 2 * sizeof(u32));
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STORE(oid->ids[2], 3);
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registering->oid = oid;
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add_tail(&p->register_queue, ®istering->n);
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p->register_to_ack++;
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snmp_register(p, oid, 0, 1);
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}
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/ * register dynamic BGP4-MIB::bgpPeerEntry.* * /
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u32 bgp_peer_entry[] = { 1, 15, 3, 1, 1};
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snmp_log("before hash walk - registering dynamic parts");
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HASH_WALK(p->bgp_hash, next, peer)
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{
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struct snmp_register *registering = snmp_register_create(p, SNMP_BGP4_MIB);
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struct oid *oid = mb_alloc(p->p.pool, snmp_oid_sizeof(10));
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put_u8(&oid->n_subid, 9);
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put_u8(&oid->prefix, 2);
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memcpy(oid->ids, bgp_peer_entry, 5 * sizeof(u32));
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snmp_oid_ip4_index(oid, 5, ipa_to_ip4(peer->peer_ip));
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registering->oid = oid;
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add_tail(&p->register_queue, ®istering->n);
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snmp_register(p, oid, 0, 1);
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}
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HASH_WALK_END;
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snmp_log("after hash walk");
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*/
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}
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static int
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@ -193,10 +113,12 @@ bgp_get_candidate(u32 field)
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[SNMP_BGP_IN_UPDATE_ELAPSED_TIME] = BGP_INTERNAL_IN_UPDATE_ELAPSED_TIME,
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};
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/* first value is in secord cell of array translation_table (as the
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/*
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* First value is in secord cell of array translation_table (as the
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* SNMP_BPG_IDENTIFIER == 1
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*/
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if (field > 0 && field <= sizeof(translation_table) / sizeof(translation_table[0]))
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if (field > 0 &&
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field <= sizeof(translation_table)/sizeof(translation_table[0]) - 1)
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return translation_table[field];
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if (field == 0)
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return BGP_INTERNAL_INVALID;
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@ -219,7 +141,6 @@ static void
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print_bgp_record(struct bgp_config *config)
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{
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struct proto_config *cf = (struct proto_config *) config;
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// struct proto *P = cf->proto;
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struct bgp_proto *bgp_proto = (struct bgp_proto *) cf->proto;
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struct bgp_conn *conn = bgp_proto->conn;
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@ -236,7 +157,6 @@ print_bgp_record(struct bgp_config *config)
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snmp_log(" remote as: %u", conn->remote_caps->as4_number);
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}
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snmp_log(" in updates: %u", bgp_proto->stats.rx_updates);
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snmp_log(" out updates: %u", bgp_proto->stats.tx_updates);
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snmp_log(" in total: %u", bgp_proto->stats.rx_messages);
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@ -282,8 +202,10 @@ print_bgp_record_all(struct snmp_proto *p)
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static u8
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snmp_bgp_state(const struct oid *oid)
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{
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/* already checked:
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* xxxxxxxx p
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/*
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* Ids of Object Identifier that are already checked:
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* internet oid.prefix
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* v...... v
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* (*oid): .1.3.6.1.2.1.15
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* -> BGP4-MIB::bgp (root)
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*/
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@ -302,12 +224,13 @@ snmp_bgp_state(const struct oid *oid)
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state = BGP_INTERNAL_INVALID;
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break;
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}
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/* else oid->n_subid >= 2 */
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/* fall through */
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/* between ids[5] and ids[8] (n_subid == 9) should be IP address
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* validity is checked later in execution because
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* this field also could mean a query boundry (upper or lower)
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/*
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* Between ids[5] and ids[8] (n_subid == 9) should be IP address.
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* Validity is checked later in execution because
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* this field also could mean a query boundry (upper or lower).
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*/
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case 9:
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case 8:
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@ -339,13 +262,13 @@ snmp_bgp_state(const struct oid *oid)
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state = BGP_INTERNAL_LOCAL_AS;
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break;
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case SNMP_BGP_PEER_TABLE:
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/* candidate avoid overriding more specific state */
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/* We use candidate to avoid overriding more specific state */
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candidate = BGP_INTERNAL_PEER_TABLE;
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break;
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default: /* test fails */
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/* invalidate the state forcefully */
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/* We force state invalidation */
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if (oid->ids[2] < SNMP_BGP_VERSION)
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{
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state = BGP_INTERNAL_NO_VALUE;
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@ -359,7 +282,7 @@ snmp_bgp_state(const struct oid *oid)
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/* fall through */
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case 2: /* bare BGP4-MIB::bgp */
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case 2: /* We found bare BGP4-MIB::bgp ObjectId */
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if (state == BGP_INTERNAL_NO_VALUE ||
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state == BGP_INTERNAL_INVALID)
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state = BGP_INTERNAL_BGP;
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@ -397,12 +320,11 @@ snmp_bgp_has_value(u8 state)
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u8
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snmp_bgp_get_valid(u8 state)
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{
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/* invalid
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* SNMP_BGP SNMP_BGP_PEER_TABLE SNMP_BGP_PEER_ENTRY
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* SNMP_BGP_FSM_ESTABLISHED_TIME SNMP_BGP_IN_UPDATE_ELAPSED_TIME
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*/
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if (state == 1 || state == 4 || state == 5 ||
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state == 21 || state == 29)
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if (state == BGP_INTERNAL_INVALID ||
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state == BGP_INTERNAL_BGP ||
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state == BGP_INTERNAL_PEER_TABLE ||
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state == BGP_INTERNAL_PEER_ENTRY ||
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state >= BGP_INTERNAL_END)
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return 0;
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else
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return state;
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@ -437,7 +359,6 @@ snmp_bgp_next_state(u8 state)
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int
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snmp_bgp_is_supported(struct oid *o)
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{
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/* most likely not functioning */
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if (o->prefix == 2 && o->n_subid > 0 && o->ids[0] == 1)
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{
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if (o->n_subid == 2 && (o->ids[1] == SNMP_BGP4_MIB ||
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@ -449,16 +370,10 @@ snmp_bgp_is_supported(struct oid *o)
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if (o->n_subid == 3)
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return 1;
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if (o->n_subid == 8 && o->ids[3] > 0)
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/* do not include bgpPeerInUpdatesElapsedTime
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and bgpPeerFsmEstablishedTime */
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//&& o->ids[3] < SNMP_BGP_IN_UPDATE_ELAPSED_TIME
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//&& o->ids[3] != SNMP_BGP_FSM_ESTABLISHED_TIME)
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return 1;
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}
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else
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return 0;
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}
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return 0;
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}
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@ -487,7 +402,7 @@ update_bgp_oid(struct oid *oid, u8 state)
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state == BGP_INTERNAL_NO_VALUE)
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return oid;
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/* if same state, no need to realloc anything */
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/* No need to reallocate anything if the OID is has same lin. state */
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if (snmp_bgp_state(oid) == state)
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{
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if (state >= BGP_INTERNAL_IDENTIFIER &&
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@ -507,24 +422,18 @@ update_bgp_oid(struct oid *oid, u8 state)
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switch (state)
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{
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case BGP_INTERNAL_BGP:
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/* could destroy same old data */
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/* This could potentially destroy same old data */
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if (oid->n_subid != 2)
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{
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snmp_log("realloc");
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oid = mb_realloc(oid, snmp_oid_sizeof(2));
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snmp_log("/realloc");
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}
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oid->n_subid = 2;
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oid->ids[0] = 1;
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oid->ids[0] = SNMP_MIB_2;
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oid->ids[1] = SNMP_BGP4_MIB;
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break;
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case BGP_INTERNAL_VERSION:
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if (oid->n_subid != 3)
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{ snmp_log("realloc");
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oid = mb_realloc(oid, snmp_oid_sizeof(3));
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snmp_log("/realloc"); }
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oid->n_subid = 3;
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oid->ids[2] = SNMP_BGP_VERSION;
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@ -532,20 +441,16 @@ update_bgp_oid(struct oid *oid, u8 state)
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case BGP_INTERNAL_LOCAL_AS:
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if (oid->n_subid != 3)
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{ snmp_log("realloc");
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oid = mb_realloc(oid, snmp_oid_sizeof(3));
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snmp_log("/realloc"); }
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oid->n_subid = 3;
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oid->ids[2] = 2;
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oid->ids[2] = SNMP_BGP_LOCAL_AS;
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break;
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case BGP_INTERNAL_IDENTIFIER:
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if (oid->n_subid != 9)
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{
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snmp_log("realloc");
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oid = mb_realloc(oid, snmp_oid_sizeof(9));
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snmp_log("/realloc");
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if (oid->n_subid < 6)
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oid->ids[5] = 0;
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@ -568,9 +473,7 @@ update_bgp_oid(struct oid *oid, u8 state)
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case num: \
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if (oid->n_subid != 9) \
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{ \
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snmp_log("realloc"); \
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oid = mb_realloc(oid, snmp_oid_sizeof(9)); \
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snmp_log("/realloc"); \
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\
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if (oid->n_subid < 6) \
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oid->ids[5] = 0; \
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@ -632,7 +535,8 @@ update_bgp_oid(struct oid *oid, u8 state)
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SNMP_UPDATE_CASE(BGP_INTERNAL_IN_UPDATE_ELAPSED_TIME, SNMP_BGP_IN_UPDATE_ELAPSED_TIME)
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default:
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die("update unavailable");
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/* intentionally left blank */
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break;
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}
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return oid;
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@ -659,7 +563,7 @@ bgp_find_dynamic_oid(struct snmp_proto *p, struct oid *o_start, const struct oid
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u8 end_state = snmp_bgp_state(o_end);
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dest = (start_state == end_state && o_end->n_subid > 5) ?
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ip4_from_oid(o_end) :
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ip4_from_u32(0xFFFFFFFF);
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ip4_from_u32(UINT32_MAX);
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}
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snmp_log("ip addresses build (ip4) %I (dest) %I", ipa_from_ip4(ip4), ipa_from_ip4(dest));
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@ -671,19 +575,17 @@ bgp_find_dynamic_oid(struct snmp_proto *p, struct oid *o_start, const struct oid
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struct f_trie_walk_state ws;
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// TODO move to newer API
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trie_walk_init(&ws, p->bgp_trie, NULL, 0);
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snmp_log("walk init");
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if (trie_walk_next(&ws, &net)) // && ip4_less(net4_prefix(net), dest))
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if (trie_walk_next(&ws, &net))
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{
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snmp_log("trie_walk_next() returned true");
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/*
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* if the o_end is empty then there are no conditions on the ip4 addr
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* If the o_end is empty, then there are no conditions on the ip4 address.
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*/
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//int cmp = (check_dest) ? ip4_compare(net4_prefix(&net), dest) : ;
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int cmp = ip4_compare(net4_prefix(&net), dest);
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if (cmp < 0 || (cmp == 0 && snmp_is_oid_empty(o_end)))
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{
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@ -696,19 +598,11 @@ bgp_find_dynamic_oid(struct snmp_proto *p, struct oid *o_start, const struct oid
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return o;
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}
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// delete me
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else
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{
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snmp_log("ip4_less() returned false for %I >= %I", net4_prefix(&net), dest);
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}
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// delete me end
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}
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else
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{
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snmp_log("trie_walk_next() returned false, cleaning");
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}
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return NULL;
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}
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@ -733,7 +627,7 @@ UNUSED, u8 current_state)
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snmp_oid_dump(o_start);
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next_state = snmp_bgp_next_state(next_state);
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/* search in next state is done from beginning */
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/* We search in next state is done from beginning. */
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o_start->ids[5] = o_start->ids[6] = o_start->ids[7] = o_start->ids[8] = 0;
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o_start->include = 1;
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@ -805,7 +699,6 @@ snmp_bgp_search_dynamic(struct snmp_proto *p, struct oid **searched, const struc
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u8 end_state = snmp_bgp_state(o_end);
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snmp_log("before assumption %s [%u] < %u INTERNAL_END", debug_bgp_states[end_state], end_state, BGP_INTERNAL_END);
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// failed
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ASSUME(end_state <= BGP_INTERNAL_END);
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snmp_log("before assupmtion oid 0x%p != NULL (0x0)", oid);
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ASSUME(oid != NULL);
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@ -825,7 +718,7 @@ snmp_bgp_search_dynamic(struct snmp_proto *p, struct oid **searched, const struc
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if (next_state == BGP_INTERNAL_END)
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break;
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oid = update_bgp_oid(oid, next_state);
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/* in search for next bgp state, we want to start from beginning */
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/* In case of search for next bgp state, we want to start from beginning. */
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oid->ids[5] = oid->ids[6] = oid->ids[7] = oid->ids[8] = 0;
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}
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@ -835,7 +728,6 @@ snmp_bgp_search_dynamic(struct snmp_proto *p, struct oid **searched, const struc
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return SNMP_SEARCH_OK;
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}
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// free in the caller ?!
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mb_free(oid);
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*searched = NULL;
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return SNMP_SEARCH_END_OF_VIEW;
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@ -865,7 +757,10 @@ snmp_bgp_search2(struct snmp_proto *p, struct oid **searched, const struct oid *
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snmp_log("after oid update:");
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snmp_oid_dump(*searched);
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/* zero the ip address section for previously non-dynamic oid (search all peers) */
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/*
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* We zero the ip address section of the oid if we go from non-dynamic state
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* to dynamic one.
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*/
|
||||
for (int i = 5; i < MIN(9, oid->n_subid); i++)
|
||||
oid->ids[i] = 0;
|
||||
}
|
||||
@ -874,7 +769,6 @@ snmp_bgp_search2(struct snmp_proto *p, struct oid **searched, const struct oid *
|
||||
{
|
||||
snmp_log("returning oid with dynamic state 2");
|
||||
return snmp_bgp_search_dynamic(p, searched, o_end, contid, bgp_state);
|
||||
//return snmp_bgp_search_dynamic(p, o_start, contid, result, bgp_state);
|
||||
}
|
||||
|
||||
oid = *searched = update_bgp_oid(*searched, bgp_state);
|
||||
@ -887,78 +781,24 @@ snmp_bgp_search2(struct snmp_proto *p, struct oid **searched, const struct oid *
|
||||
}
|
||||
|
||||
snmp_log("reached unguarded code, returning END_OF_VIEW");
|
||||
/* TODO */
|
||||
//if (
|
||||
|
||||
|
||||
return SNMP_SEARCH_END_OF_VIEW;
|
||||
// return SNMP_NO_SUCH_OBJECT;
|
||||
|
||||
#if 0
|
||||
if (is_dynamic(bgp_state))
|
||||
return snmp_bgp_search_dynamic(p, o_start, contid, res);
|
||||
|
||||
if (!snmp_bgp_has_value(bgp_state))
|
||||
{
|
||||
bgp_state = x;
|
||||
}
|
||||
print_bgp_record_all(p);
|
||||
|
||||
if (o_start->include)
|
||||
return snmp_bgp_search_included(p, o_start, contid, result, bgp_state);
|
||||
|
||||
u8 next_state = snmp_bgp_next_state(bgp_state);
|
||||
if (!is_dynamic(next_state))
|
||||
{
|
||||
o_start = update_bgp_oid(o_start, next_state);
|
||||
snmp_log("next state is also not dynamic");
|
||||
*res = o_start;
|
||||
return SNMP_SEARCH_OK;
|
||||
}
|
||||
|
||||
return search_bgp_dynamic(p, o_start, o_end, contid, bgp_state);
|
||||
|
||||
|
||||
if (o_start->include && snmp_bgp_has_value(bgp_state))
|
||||
&& !is_dynamic(bgp_state))
|
||||
{
|
||||
if (o_start->n_subid == 3)
|
||||
{
|
||||
o_start->include = 0;
|
||||
*result = o_start;
|
||||
return SNMP_SEARCH_OK;
|
||||
}
|
||||
else if (o_start->n_subid > 3)
|
||||
return SNMP_SEARCH_NO_INSTANCE;
|
||||
else
|
||||
return SNMP_SEARCH_NO_OBJECT;
|
||||
}
|
||||
else if (o_start->include && snmp_bgp_has_value(bgp_state))
|
||||
&& is_dynamic(bgp_state))
|
||||
return search_bgp_dynamic1(p, o_start, contid, result);
|
||||
else if (o_start
|
||||
|
||||
/ * o_start is not inclusive * /
|
||||
#endif
|
||||
}
|
||||
|
||||
/* o_start could be o_curr, but has basically same meaning for searching */
|
||||
struct oid *
|
||||
snmp_bgp_search(struct snmp_proto *p, struct oid *o_start, struct oid *o_end, uint contid UNUSED)
|
||||
{
|
||||
u8 start_state = snmp_bgp_state(o_start);
|
||||
//u8 state_curr = snmp_bgp_state(o_start);
|
||||
//u8 state_end = (o_end) ? snmp_bgp_state(o_end) : 0;
|
||||
|
||||
|
||||
// print debugging information
|
||||
print_bgp_record_all(p);
|
||||
|
||||
if (o_start->include && snmp_bgp_has_value(start_state) &&
|
||||
!is_dynamic(start_state) && o_start->n_subid == 3)
|
||||
{
|
||||
snmp_log("snmp_bgp_search() first search element (due to include field) returned");
|
||||
o_start->include = 0; /* disable including for next time */
|
||||
/* We disable including for next time searching. */
|
||||
o_start->include = 0;
|
||||
return o_start;
|
||||
}
|
||||
else if (o_start->include && snmp_bgp_has_value(start_state) &&
|
||||
@ -968,8 +808,7 @@ snmp_bgp_search(struct snmp_proto *p, struct oid *o_start, struct oid *o_end, ui
|
||||
return search_bgp_dynamic(p, o_start, o_end, contid, start_state);
|
||||
}
|
||||
|
||||
|
||||
/* o_start is not inclusive */
|
||||
/* o_start->include == 0 */
|
||||
|
||||
u8 next_state = snmp_bgp_next_state(start_state);
|
||||
// TODO more checks ?!?
|
||||
@ -977,37 +816,12 @@ snmp_bgp_search(struct snmp_proto *p, struct oid *o_start, struct oid *o_end, ui
|
||||
{
|
||||
o_start = update_bgp_oid(o_start, next_state);
|
||||
snmp_log("next state is also not dynamic");
|
||||
//snmp_oid_dump(o_start);
|
||||
return o_start;
|
||||
}
|
||||
|
||||
/* is_dynamic(next_state) == 1 */
|
||||
return search_bgp_dynamic(p, o_start, o_end, 0, next_state);
|
||||
|
||||
// // TODO readable rewrite
|
||||
// /* if state is_dynamic() then has more value and need find the right one */
|
||||
// else if (!is_dynamic(start_state))
|
||||
// {
|
||||
// snmp_log("seach_bgp_mib() static part");
|
||||
// u8 next_state = snmp_bgp_next_state(start_state);
|
||||
// snmp_log(" bgp states old %u new %u", start_state, next_state);
|
||||
// snmp_oid_dump(o_start);
|
||||
// o_start = update_bgp_oid(o_start, next_state);
|
||||
// snmp_oid_dump(o_start);
|
||||
//
|
||||
// snmp_log("snmp_bgp_search() is NOT next_state dynamic %s",
|
||||
// !is_dynamic(next_state) ? "true" : "false");
|
||||
//
|
||||
// if (!is_dynamic(next_state))
|
||||
// return o_start;
|
||||
//
|
||||
// else
|
||||
// /* no need to check that retval < o_end -- done by bgp_find_dynamic_oid() */
|
||||
// return search_bgp_dynamic(p, o_start, o_end, 0, next_state);
|
||||
// }
|
||||
//
|
||||
// /* no need to check that retval < o_end -- done by bgp_find_dynamic_oid() */
|
||||
// return search_bgp_dynamic(p, o_start, o_end, 0, start_state);
|
||||
return search_bgp_dynamic(p, o_start, o_end, 0, next_state);
|
||||
}
|
||||
|
||||
static byte *
|
||||
@ -1030,7 +844,6 @@ bgp_fill_dynamic(struct snmp_proto UNUSED *p, struct agentx_varbind *vb,
|
||||
}
|
||||
|
||||
snmp_log(" -> ip addr %I", addr);
|
||||
// TODO XXX deal with possible change of (remote) ip
|
||||
struct snmp_bgp_peer *pe = HASH_FIND(p->bgp_hash, SNMP_HASH, addr);
|
||||
|
||||
struct bgp_proto *bgp_proto = NULL;
|
||||
@ -1044,7 +857,7 @@ bgp_fill_dynamic(struct snmp_proto UNUSED *p, struct agentx_varbind *vb,
|
||||
bgp_proto = (struct bgp_proto *) proto;
|
||||
snmp_log("bgp_dynamic_fill() using bgp_proto %p", bgp_proto);
|
||||
}
|
||||
/* binded bgp protocol not found */
|
||||
/* We did not found binded BGP protocol. */
|
||||
else
|
||||
{
|
||||
die("Binded bgp protocol not found!");
|
||||
@ -1093,7 +906,6 @@ bgp_fill_dynamic(struct snmp_proto UNUSED *p, struct agentx_varbind *vb,
|
||||
break;
|
||||
|
||||
case BGP_INTERNAL_ADMIN_STATUS:
|
||||
/* struct proto ~ (struct proto *) bgp_proto */
|
||||
if (proto->disabled)
|
||||
pkt = snmp_varbind_int(vb, size, AGENTX_ADMIN_STOP);
|
||||
else
|
||||
@ -1248,7 +1060,8 @@ UNUSED, uint contid UNUSED, int byte_ord UNUSED, u8 state)
|
||||
snmp_oid_dump(oid);
|
||||
snmp_log("bgp_fill_static");
|
||||
|
||||
/* snmp_bgp_state() check only prefix. To be sure on oid equivalence we need to
|
||||
/*
|
||||
* snmp_bgp_state() check only prefix. To be sure on OID equivalence we need to
|
||||
* compare the oid->n_subid length. All BGP static fields have same n_subid.
|
||||
*/
|
||||
if (oid_state_compare(oid, state) < 0 || state == BGP_INTERNAL_END)
|
||||
@ -1293,12 +1106,10 @@ snmp_bgp_fill(struct snmp_proto *p, struct agentx_varbind *vb,
|
||||
struct snmp_pdu_context *c)
|
||||
{
|
||||
u8 state = snmp_bgp_state(&vb->name);
|
||||
//byte *tmp;
|
||||
|
||||
byte *pkt;
|
||||
if (!is_dynamic(state))
|
||||
{
|
||||
//return bgp_fill_static(p, vb, c->buffer, c->size, c->context, c->byte_ord, state);
|
||||
pkt = bgp_fill_static(p, vb, c->buffer, c->size, c->context, c->byte_ord, state);
|
||||
ADVANCE(c->buffer, c->size, pkt - c->buffer);
|
||||
return;
|
||||
@ -1313,7 +1124,6 @@ snmp_bgp_fill(struct snmp_proto *p, struct agentx_varbind *vb,
|
||||
else
|
||||
{
|
||||
die("snmp_bgp_fill unreachable");
|
||||
// AGENTX_NO_SUCH_OBJECT
|
||||
((void) c->buffer);
|
||||
return;
|
||||
}
|
||||
|
||||
@ -27,28 +27,16 @@
|
||||
*
|
||||
*/
|
||||
|
||||
//static byte *snmp_mib_fill(struct snmp_proto *p, struct oid *oid, u8 mib_class, struct snmp_pdu_context *c);
|
||||
|
||||
static void snmp_mib_fill2(struct snmp_proto *p, struct oid *oid, struct snmp_pdu_context *c);
|
||||
static uint parse_response(struct snmp_proto *p, byte *buf, uint size);
|
||||
//static uint parse_response(struct snmp_proto *p, byte *buf, uint size);
|
||||
// static int snmp_stop_ack(sock *sk, uint size);
|
||||
static void do_response(struct snmp_proto *p, byte *buf, uint size);
|
||||
//static uint parse_gets_pdu(struct snmp_proto *p, byte *buf, uint size, uint *skip);
|
||||
static uint parse_gets2_pdu(struct snmp_proto *p, byte *buf, uint size, uint *skip);
|
||||
//static uint parse_gets_pdu(struct snmp_proto *p, struct snmp_pdu_context *c);
|
||||
// static uint parse_close_pdu(struct snmp_proto *p, struct snmp_pdu_context *c);
|
||||
static uint parse_close_pdu(struct snmp_proto *p, byte *buf, uint size);
|
||||
static struct agentx_response *prepare_response(struct snmp_proto *p, struct snmp_pdu_context *c);
|
||||
//static byte *prepare_response(struct snmp_proto *p, struct snmp_pdu_context *c);
|
||||
//static struct agentx_response *prepare_response(struct snmp_proto *p, byte *buf, uint size);
|
||||
static void response_err_ind(struct agentx_response *res, uint err, uint ind);
|
||||
static uint update_packet_size(struct snmp_proto *p, byte *start, byte *end);
|
||||
//static void response_err_ind(byte *buf, uint err, uint ind);
|
||||
//static struct oid *search_mib(struct snmp_proto *p, struct oid *o_start, struct oid *o_end, struct oid *o_curr, u8 mib_class, struct snmp_pdu_context *c);
|
||||
static struct oid *search_mib(struct snmp_proto *p, const struct oid *o_start, const struct oid *o_end, struct oid *o_curr, struct snmp_pdu_context *c, enum snmp_search_res *result);
|
||||
//static struct oid *search_mib(struct snmp_proto *p, struct oid *o_start, struct oid *o_end, struct oid *o_curr, u8 mib_class, uint contid);
|
||||
// static inline byte *find_n_fill(struct snmp_proto *p, struct oid *o, byte *buf, uint size, uint contid, int byte_ord);
|
||||
|
||||
static const char * const snmp_errs[] = {
|
||||
#define SNMP_ERR_SHIFT 256
|
||||
@ -215,36 +203,7 @@ agentx_alloc_context *ac)
|
||||
}
|
||||
#endif
|
||||
|
||||
/* index allocate / deallocate pdu * /
|
||||
static void
|
||||
de_allocate_pdu(struct snmp_proto *p, struct oid *oid, u8 type)
|
||||
{
|
||||
sock *sk = p->sock;
|
||||
byte *buf, *pkt;
|
||||
buf = pkt = sk->tbuf;
|
||||
uint size = sk->tbsize;
|
||||
|
||||
|
||||
if (size > AGENTX_HEADER_SIZE + )
|
||||
{
|
||||
snmp_log("de_allocate_pdu()");
|
||||
|
||||
struct agentx_header *h;
|
||||
SNMP_CREATE(pkt, struct agentx_header, h);
|
||||
SNMP_BLANK_HEADER(h, type);
|
||||
SNMP_SESSION(h,p);
|
||||
|
||||
struct agentx_varbind *vb = (struct agentx_varbind *) pkt;
|
||||
STORE_16(vb->type, AGENTX_OBJECT_ID);
|
||||
STORE(vb->oid,
|
||||
}
|
||||
|
||||
else
|
||||
snmp_log("de_allocate_pdu(): insufficient size");
|
||||
}
|
||||
*/
|
||||
|
||||
/* Register-PDU / Unregister-PDU */
|
||||
/* Register-PDU / Unregister-PDU common code */
|
||||
static inline void
|
||||
un_register_pdu(struct snmp_proto *p, struct oid *oid, uint index, uint len, u8 type, u8 is_instance)
|
||||
{
|
||||
@ -270,23 +229,21 @@ un_register_pdu(struct snmp_proto *p, struct oid *oid, uint index, uint len, u8
|
||||
ADVANCE(c.buffer, c.size, sizeof(struct agentx_un_register_pdu));
|
||||
struct agentx_header *h = &ur->h;
|
||||
|
||||
// FIXME correctly set INSTANCE REGISTRATION bit
|
||||
SNMP_HEADER(h, type, is_instance ? AGENTX_FLAG_INSTANCE_REGISTRATION : 0);
|
||||
/* use new transactionID, reset packetID */
|
||||
/* use new packetID */
|
||||
p->packet_id++;
|
||||
SNMP_SESSION(h, p);
|
||||
|
||||
/* do not override timeout */
|
||||
STORE_U32(ur->timeout, 15);
|
||||
/* default priority */
|
||||
STORE_U32(ur->priority, AGENTX_PRIORITY);
|
||||
/* We use default priority */
|
||||
STORE_U32(ur->priority, AGENTX_PRIORITY); // TODO configurable priority
|
||||
STORE_U32(ur->range_subid, (len > 1) ? index : 0);
|
||||
|
||||
snmp_put_oid(c.buffer, oid);
|
||||
ADVANCE(c.buffer, c.size, snmp_oid_size(oid));
|
||||
// snmp_log("pkt - buf : %lu sizeof %u", pkt -buf, AGENTX_HEADER_SIZE);
|
||||
|
||||
/* place upper-bound if needed */
|
||||
/* We place upper-bound if needed. */
|
||||
if (len > 1)
|
||||
{
|
||||
STORE_PTR(c.buffer, len);
|
||||
@ -305,7 +262,7 @@ un_register_pdu(struct snmp_proto *p, struct oid *oid, uint index, uint len, u8
|
||||
snmp_log("sk_send error");
|
||||
}
|
||||
|
||||
/* register pdu */
|
||||
/* Register-PDU */
|
||||
void
|
||||
snmp_register(struct snmp_proto *p, struct oid *oid, uint index, uint len, u8 is_instance)
|
||||
{
|
||||
@ -313,7 +270,7 @@ snmp_register(struct snmp_proto *p, struct oid *oid, uint index, uint len, u8 is
|
||||
}
|
||||
|
||||
|
||||
/* unregister pdu */
|
||||
/* Unregister-PDU */
|
||||
void UNUSED
|
||||
snmp_unregister(struct snmp_proto *p, struct oid *oid, uint index, uint len)
|
||||
{
|
||||
@ -508,7 +465,6 @@ static uint
|
||||
parse_pkt(struct snmp_proto *p, byte *pkt, uint size, uint *skip)
|
||||
{
|
||||
snmp_log("parse_ptk() pkt start: %p", pkt);
|
||||
//snmp_dump_packet(p->sock->tbuf, 64);
|
||||
|
||||
if (size < AGENTX_HEADER_SIZE)
|
||||
return 0;
|
||||
@ -518,7 +474,6 @@ parse_pkt(struct snmp_proto *p, byte *pkt, uint size, uint *skip)
|
||||
|
||||
snmp_log("parse_pkt got type %s", snmp_pkt_type[h->type]);
|
||||
snmp_dump_packet((void *)h, MIN(h->payload, 256));
|
||||
//snmp_dump_packet((void *)h, LOAD(h->payload, h->flags & AGENTX_NETWORK_BYTE_ORDER));
|
||||
switch (h->type)
|
||||
{
|
||||
case AGENTX_RESPONSE_PDU:
|
||||
@ -526,18 +481,10 @@ parse_pkt(struct snmp_proto *p, byte *pkt, uint size, uint *skip)
|
||||
parsed_len = parse_response(p, pkt, size);
|
||||
break;
|
||||
|
||||
/*
|
||||
case AGENTX_GET_PDU:
|
||||
refresh_ids(p, h);
|
||||
return parse_get_pdu(p, pkt, size);
|
||||
*/
|
||||
|
||||
case AGENTX_GET_PDU:
|
||||
case AGENTX_GET_NEXT_PDU:
|
||||
case AGENTX_GET_BULK_PDU:
|
||||
refresh_ids(p, h);
|
||||
//parsed_len = parse_gets_pdu(p, &c);
|
||||
//parsed_len = parse_gets_pdu(p, pkt, size, skip);
|
||||
parsed_len = parse_gets2_pdu(p, pkt, size, skip);
|
||||
break;
|
||||
|
||||
@ -557,16 +504,7 @@ parse_pkt(struct snmp_proto *p, byte *pkt, uint size, uint *skip)
|
||||
//die("unknown packet type %u", h->type);
|
||||
}
|
||||
|
||||
/* We will process the same header again later * /
|
||||
if (*skip || parsed_len < size)
|
||||
{
|
||||
/ * We split our answer to multiple packet, we should differentiate them * /
|
||||
h->packet_id++;
|
||||
}
|
||||
*/
|
||||
|
||||
snmp_log("parse_pkt returning parsed length");
|
||||
//snmp_dump_packet(p->sock->tbuf, 64);
|
||||
return parsed_len;
|
||||
}
|
||||
|
||||
@ -575,8 +513,6 @@ parse_response(struct snmp_proto *p, byte *res, uint size)
|
||||
{
|
||||
snmp_log("parse_response() g%u h%u", size, sizeof(struct agentx_header));
|
||||
|
||||
//snmp_dump_packet(res, size);
|
||||
|
||||
if (size < sizeof(struct agentx_response))
|
||||
return 0;
|
||||
|
||||
@ -603,7 +539,7 @@ parse_response(struct snmp_proto *p, byte *res, uint size)
|
||||
if (r->error == AGENTX_RES_NO_ERROR)
|
||||
do_response(p, res, size);
|
||||
else
|
||||
/* erronous packet should be dropped quietly */
|
||||
/* Erronous packet should be dropped quietly. */
|
||||
snmp_log("an error occured '%s'", snmp_errs[get_u16(&r->error) - SNMP_ERR_SHIFT]);
|
||||
|
||||
return pkt_size + AGENTX_HEADER_SIZE;
|
||||
@ -638,11 +574,12 @@ do_response(struct snmp_proto *p, byte *buf, uint size UNUSED)
|
||||
switch (p->state)
|
||||
{
|
||||
case SNMP_INIT:
|
||||
/* copy session info from recieved packet */
|
||||
/* We copy session info from recieved packet */
|
||||
p->session_id = LOAD_U32(h->session_id, byte_ord);
|
||||
refresh_ids(p, h);
|
||||
|
||||
/* the state needs to be changed before sending registering PDUs to
|
||||
/*
|
||||
* The state needs to be changed before sending registering PDUs to
|
||||
* use correct do_response action on them
|
||||
*/
|
||||
snmp_log("changing state to REGISTER");
|
||||
@ -678,7 +615,7 @@ do_response(struct snmp_proto *p, byte *buf, uint size UNUSED)
|
||||
u8
|
||||
snmp_get_mib_class(const struct oid *oid)
|
||||
{
|
||||
// TODO check code paths for oid->n_subid < 3
|
||||
ASSUME(oid->n_subid > 2);
|
||||
if (oid->prefix != 2 && oid->ids[0] != SNMP_MIB_2)
|
||||
return SNMP_CLASS_INVALID;
|
||||
|
||||
@ -692,37 +629,6 @@ snmp_get_mib_class(const struct oid *oid)
|
||||
}
|
||||
}
|
||||
|
||||
#if 0
|
||||
static byte *
|
||||
snmp_get_next(struct snmp_proto *p, struct oid *o_start, struct oid *o_end,
|
||||
u8 mib_class, struct snmp_pdu_context *c)
|
||||
{
|
||||
snmp_log("type GetNext-PDU");
|
||||
enum snmp_search_res r;
|
||||
struct oid *o_copy = search_mib(p, o_start, o_end, NULL, c, &r);
|
||||
|
||||
snmp_log("search result");
|
||||
snmp_oid_dump(o_copy);
|
||||
|
||||
byte *read;
|
||||
if (o_copy)
|
||||
{
|
||||
read = snmp_mib_fill(p, o_copy, mib_class, c);
|
||||
mb_free(o_copy);
|
||||
}
|
||||
else
|
||||
{
|
||||
struct agentx_varbind *vb = snmp_create_varbind(c->buffer, o_start);
|
||||
c->buffer += snmp_varbind_header_size(vb);
|
||||
vb->type = snmp_search_res_to_type(r);
|
||||
//vb->type = AGENTX_NO_SUCH_OBJECT;
|
||||
}
|
||||
|
||||
snmp_log("over HERE ");
|
||||
return read;
|
||||
}
|
||||
#endif
|
||||
|
||||
static void
|
||||
snmp_get_next2(struct snmp_proto *p, struct oid *o_start, struct oid *o_end,
|
||||
struct snmp_pdu_context *c)
|
||||
@ -743,9 +649,8 @@ snmp_get_next2(struct snmp_proto *p, struct oid *o_start, struct oid *o_end,
|
||||
|
||||
if (c->size < sz)
|
||||
{
|
||||
/* TODO manage insufficient buffer properly */
|
||||
c->error = AGENTX_RES_GEN_ERROR;
|
||||
return;
|
||||
/* This is a bit tricky as we invalidate all in TX buffer pointers */
|
||||
snmp_manage_tbuf(p, c);
|
||||
}
|
||||
|
||||
vb = snmp_create_varbind(c->buffer, o_start);
|
||||
@ -760,12 +665,12 @@ snmp_get_next2(struct snmp_proto *p, struct oid *o_start, struct oid *o_end,
|
||||
|
||||
if (o_copy)
|
||||
{
|
||||
/* basicaly snmp_create_varbind(c->buffer, o_copy),
|
||||
/* Basicaly snmp_create_varbind(c->buffer, o_copy),
|
||||
* but without any copying */
|
||||
vb = (void *) c->buffer;
|
||||
snmp_mib_fill2(p, o_copy, c);
|
||||
|
||||
/* override the error value for GetNext-PDU when object is not found */
|
||||
/* Override the error value for GetNext-PDU when object is not found. */
|
||||
switch (vb->type)
|
||||
{
|
||||
case AGENTX_NO_SUCH_OBJECT:
|
||||
@ -792,63 +697,6 @@ snmp_get_next2(struct snmp_proto *p, struct oid *o_start, struct oid *o_end,
|
||||
ADVANCE(c->buffer, c->size, snmp_varbind_header_size(vb));
|
||||
}
|
||||
|
||||
#if 0
|
||||
static byte *
|
||||
snmp_get_bulk(struct snmp_proto *p, struct oid *o_start, struct oid *o_end,
|
||||
struct agentx_bulk_state *state, struct snmp_pdu_context *c)
|
||||
{
|
||||
snmp_log("type GetBulk-PDU");
|
||||
// TODO add state cache (to prevent O(n^2) complexity)
|
||||
|
||||
if (state->index <= state->getbulk.non_repeaters)
|
||||
{
|
||||
(void)0;
|
||||
//return snmp_get_next(p, o_start, o_end, mib_class, c);
|
||||
//return snmp_get_next(p, o_start, o_end, pkt, size, contid, mib_class, byte_ord);
|
||||
return NULL;
|
||||
}
|
||||
else
|
||||
{
|
||||
u8 mib_class;
|
||||
struct oid *o_curr = NULL;
|
||||
struct oid *o_predecessor = NULL;
|
||||
enum snmp_search_res r;
|
||||
|
||||
uint i = 0;
|
||||
do
|
||||
{
|
||||
o_predecessor = o_curr;
|
||||
o_curr = search_mib(p, o_start, o_end, o_curr, c, &r);
|
||||
//o_curr = search_mib(p, o_start, o_end, o_curr, mib_class, contid);
|
||||
mib_class = snmp_get_mib_class(o_curr);
|
||||
i++;
|
||||
} while (o_curr != NULL && i < state->repetition);
|
||||
|
||||
log("bulk search result - repeating");
|
||||
snmp_oid_dump(o_curr);
|
||||
|
||||
if (!o_curr && i == 0)
|
||||
{
|
||||
//vb->name = o_start;
|
||||
//vb->type = AGENTX_RES_END_OF_MIB_VIEW;
|
||||
return NULL;
|
||||
}
|
||||
|
||||
if (!o_curr)
|
||||
{
|
||||
ASSUME(o_predecessor != NULL);
|
||||
//vb->name = o_predecessor;
|
||||
//vb->type = AGENTX_RES_END_OF_MIB_VIEW;
|
||||
return NULL;
|
||||
}
|
||||
|
||||
(void)mib_class;
|
||||
//return snmp_mib_fill(p, o_curr, mib_class, c);
|
||||
return NULL;
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
static void
|
||||
snmp_get_bulk2(struct snmp_proto *p, struct oid *o_start, struct oid *o_end,
|
||||
struct agentx_bulk_state *state, struct snmp_pdu_context *c)
|
||||
@ -924,7 +772,7 @@ parse_close_pdu(struct snmp_proto UNUSED *p, byte UNUSED *req, uint UNUSED size)
|
||||
static inline uint
|
||||
update_packet_size(struct snmp_proto *p, byte *start, byte *end)
|
||||
{
|
||||
/* work even for partial packets */
|
||||
/* Work even for partial packets */
|
||||
struct agentx_header *h = (void *) p->sock->tpos;
|
||||
|
||||
size_t s = snmp_pkt_len(start, end);
|
||||
@ -956,20 +804,19 @@ parse_gets2_pdu(struct snmp_proto *p, byte * const pkt_start, uint size, uint *s
|
||||
|
||||
sock *sk = p->sock;
|
||||
struct snmp_pdu_context c = {
|
||||
//.buffer = sk->tbuf,
|
||||
//.size = sk->tbsize,
|
||||
.buffer = sk->tpos,
|
||||
.size = sk->tbuf + sk->tbsize - sk->tpos,
|
||||
.byte_ord = h->flags & AGENTX_NETWORK_BYTE_ORDER,
|
||||
.error = AGENTX_RES_NO_ERROR,
|
||||
.context = 0,
|
||||
};
|
||||
//snmp_dump_packet(sk->tbuf, 64);
|
||||
|
||||
uint clen; /* count of characters in context (without last '\0') */
|
||||
char *context; /* newly allocated string of character */
|
||||
uint clen; /* Count of characters in context (without last '\0') */
|
||||
char *context; /* Newly allocated string of character */
|
||||
|
||||
/* alters pkt; assign context, clen */
|
||||
SNMP_LOAD_CONTEXT(p, h, pkt, context, clen);
|
||||
|
||||
/*
|
||||
* We need more data; for valid response we need to know full
|
||||
* header picture, including the context octet string
|
||||
@ -986,7 +833,7 @@ parse_gets2_pdu(struct snmp_proto *p, byte * const pkt_start, uint size, uint *s
|
||||
*/
|
||||
if (pkt_size < clen)
|
||||
{
|
||||
/* for malformed packets consume full pkt_size [or size] */
|
||||
/* For malformed packets consume full pkt_size */
|
||||
c.error = AGENTX_RES_PARSE_ERROR;
|
||||
goto send;
|
||||
}
|
||||
@ -1022,7 +869,7 @@ parse_gets2_pdu(struct snmp_proto *p, byte * const pkt_start, uint size, uint *s
|
||||
uint sz;
|
||||
if ((sz = snmp_oid_size(o_start_b)) > pkt_size)
|
||||
{
|
||||
/* for malformed packets consume full pkt_size [or size] */
|
||||
/* For malformed packets consume full pkt_size */
|
||||
c.error = AGENTX_RES_PARSE_ERROR; /* Packet error, inconsistent values */
|
||||
goto send;
|
||||
}
|
||||
@ -1035,7 +882,8 @@ parse_gets2_pdu(struct snmp_proto *p, byte * const pkt_start, uint size, uint *s
|
||||
if (sz > size && ind > 1)
|
||||
{
|
||||
snmp_log("sz %u > %u size && ind %u > 1", sz, size, ind);
|
||||
goto partial; /* send already processed part */
|
||||
/* Wait until the rest of the packet arrives, mark the proccess bytes */
|
||||
goto partial;
|
||||
}
|
||||
else if (sz > size)
|
||||
{
|
||||
@ -1047,9 +895,10 @@ parse_gets2_pdu(struct snmp_proto *p, byte * const pkt_start, uint size, uint *s
|
||||
ADVANCE(pkt, pkt_size, sz);
|
||||
size -= sz;
|
||||
|
||||
/* We load search range end OID
|
||||
/*
|
||||
* We load search range end OID.
|
||||
* The exactly same process of sanity checking is preformed while loading
|
||||
* the SearchRange's end OID
|
||||
* the SearchRange's end OID.
|
||||
*/
|
||||
const struct oid *o_end_b = (void *) pkt;
|
||||
if ((sz = snmp_oid_size(o_end_b)) > pkt_size)
|
||||
@ -1086,7 +935,6 @@ parse_gets2_pdu(struct snmp_proto *p, byte * const pkt_start, uint size, uint *s
|
||||
goto send;
|
||||
}
|
||||
|
||||
/* TODO find mib_class, check if type is GET of GET_NEXT, act acordingly */
|
||||
switch (h->type)
|
||||
{
|
||||
case AGENTX_GET_PDU:
|
||||
@ -1115,27 +963,10 @@ parse_gets2_pdu(struct snmp_proto *p, byte * const pkt_start, uint size, uint *s
|
||||
|
||||
send:
|
||||
snmp_log("gets2: sending response ...");
|
||||
//response_err_ind(response_header, c.error, ind);
|
||||
// update_packet_size(&response_header->h, sk->tbuf, c.buffer);
|
||||
//update_packet_size(p, &response_header->h, (byte *) response_header, c.buffer);
|
||||
//snmp_dump_packet((byte *) response_header, AGENTX_HEADER_SIZE + LOAD(response_header->h.payload, c.byte_ord));
|
||||
|
||||
//snmp_dump_packet((byte *) response_header, AGENTX_HEADER_SIZE + 16 + 8);
|
||||
//snmp_dump_packet(32 + ((byte *) response_header), 32);
|
||||
//snmp_dump_packet((byte *) response_header, c.buffer - ((byte *) response_header));
|
||||
/*
|
||||
|
||||
byte b,d;
|
||||
b = *((byte *) response_header);
|
||||
d = *(c.buffer - 1);
|
||||
snmp_log("diff %d start byte %u end byte %u", c.buffer - ((byte *)
|
||||
response_header), b, d);
|
||||
*/
|
||||
response_err_ind(response_header, c.error, ind);
|
||||
uint s = update_packet_size(p, (byte *) response_header, c.buffer);
|
||||
|
||||
/* number of bytes put into the tx-buffer */
|
||||
//int ret = sk_send(sk, c.buffer - sk->tbuf);
|
||||
/* Number of bytes put into the TX buffer */
|
||||
uint s = update_packet_size(p, (byte *) response_header, c.buffer);
|
||||
snmp_log("sending response to Get-PDU, GetNext-PDU or GetBulk-PDU request ...");
|
||||
int ret = sk_send(sk, s);
|
||||
if (ret == 0)
|
||||
@ -1151,20 +982,22 @@ send:
|
||||
mb_free(o_start);
|
||||
mb_free(o_end);
|
||||
|
||||
/* number of bytes parsed form rx-buffer */
|
||||
/* Number of bytes consumed from RX buffer */
|
||||
return pkt - pkt_start;
|
||||
|
||||
partial:
|
||||
snmp_log("partial packet");
|
||||
/* The context octet is not added into response pdu */
|
||||
|
||||
/* need to tweak RX buffer packet size */
|
||||
/* We need to tweak RX buffer packet size. */
|
||||
snmp_log("old rx-buffer size %u", h->payload);
|
||||
(c.byte_ord) ? put_u32(&h->payload, pkt_size) : (h->payload = pkt_size);
|
||||
snmp_log("new rx-buffer size %u", h->payload);
|
||||
|
||||
*skip = AGENTX_HEADER_SIZE;
|
||||
p->partial_response = response_header;
|
||||
|
||||
/* Number of bytes consumed from RX buffer */
|
||||
return pkt - pkt_start;
|
||||
|
||||
wait:
|
||||
@ -1174,231 +1007,14 @@ wait:
|
||||
return 0;
|
||||
}
|
||||
|
||||
#if 0
|
||||
// TODO FIXME retval
|
||||
/* req is request */
|
||||
/**
|
||||
* parse_gets_pdu - handle Get-PDU, GetNext-PDU and GetBulk-PDU
|
||||
* @p:
|
||||
* @req: request packet buffer
|
||||
* @size: request length
|
||||
*
|
||||
* Returns lenght of created response packet.
|
||||
*/
|
||||
static uint UNUSED
|
||||
parse_gets_pdu(struct snmp_proto *p, byte *pkt_start, uint size, uint UNUSED *skip)
|
||||
{
|
||||
snmp_log("parse_gets_pdu");
|
||||
|
||||
sock *sk = p->sock;
|
||||
//byte *res = sk->tbuf; /* res_pkt */
|
||||
// uint rsize = sk->tbsize;
|
||||
byte *res = sk->tpos;
|
||||
|
||||
/* req (request) points at the beginning of packet list */
|
||||
// TODO is the pkt_start really needed ?!
|
||||
struct agentx_header *h = (void *) pkt_start;
|
||||
ADVANCE(pkt_start, size, AGENTX_HEADER_SIZE);
|
||||
snmp_log("advancing %p cause header", pkt_start);
|
||||
|
||||
byte *pkt = pkt_start;
|
||||
|
||||
uint clen;
|
||||
char *context;
|
||||
SNMP_LOAD_CONTEXT(p, h, pkt, context, clen);
|
||||
|
||||
struct snmp_pdu_context c = {
|
||||
//.buffer = sk->tbuf,
|
||||
//.size = sk->tbsize,
|
||||
.buffer = sk->tpos,
|
||||
.size = sk->tbuf + sk->tbsize - sk->tpos,
|
||||
.byte_ord = h->flags & AGENTX_NETWORK_BYTE_ORDER,
|
||||
.context = 0, // FIXME add context support
|
||||
.error = AGENTX_RES_NO_ERROR,
|
||||
};
|
||||
|
||||
uint pkt_size = LOAD(h->payload, c.byte_ord);
|
||||
|
||||
// NO! CHECKs: pkt_size + HEADER_SIZE == size
|
||||
|
||||
|
||||
if (c.size < sizeof(struct agentx_response))
|
||||
{
|
||||
// FIXME alloc more mem
|
||||
die("buffer too small");
|
||||
}
|
||||
|
||||
struct agentx_response *response_header = prepare_response(p, &c);
|
||||
|
||||
/* used only for state AGENTX_GET_BULK_PDU */
|
||||
struct agentx_bulk_state bulk_state;
|
||||
if (h->type == AGENTX_GET_BULK_PDU)
|
||||
{
|
||||
snmp_log("gets creating get bulk context BEWARE");
|
||||
struct agentx_getbulk *bulk = (void *) pkt;
|
||||
ADVANCE(pkt, pkt_size, sizeof(struct agentx_getbulk));
|
||||
bulk_state = (struct agentx_bulk_state) {
|
||||
.getbulk.non_repeaters = LOAD(bulk->non_repeaters, c.byte_ord),
|
||||
.getbulk.max_repetitions = LOAD(bulk->max_repetitions, c.byte_ord),
|
||||
.index = 1,
|
||||
.repetition = 1,
|
||||
};
|
||||
}
|
||||
/*
|
||||
if (size < sizeof(struct agentx_getbulk))
|
||||
return 0;
|
||||
|
||||
if (pkt_size < sizeof(struct agentx_getbulk))
|
||||
{
|
||||
c.error = AGENTX_RES_PARSE_ERROR;
|
||||
goto send;
|
||||
}
|
||||
|
||||
struct agentx_bulk_state bulk_state;
|
||||
if (h->type == AGENTX_GET_BULK_PDU)
|
||||
{
|
||||
struct agentx_getbulk *bulk = pkt;
|
||||
ADVANCE(pkt, pkt_size, sizeof(struct agentx_getbulk));
|
||||
size -= sizeof(struct agentx_getbulk);
|
||||
|
||||
bulk_state = (struct agentx_bulk_state) {
|
||||
.getbulk.non_repeaters = LOAD16(bulk->non_repeaters, c.byte_ord);
|
||||
.getbulk.max_repetitions = LOAD16(bulk->max_repetitions, c.byte_ord);
|
||||
.index = 1,
|
||||
.repetition = 1,
|
||||
};
|
||||
}
|
||||
*/
|
||||
|
||||
byte *tmp;
|
||||
|
||||
uint ind = 1;
|
||||
while (c.error == AGENTX_RES_NO_ERROR && size > 0)
|
||||
{
|
||||
/* pkt_size is bigger that OID header */
|
||||
if (size < snmp_oid_sizeof(0))
|
||||
{
|
||||
}
|
||||
|
||||
/* oids from message buffer */
|
||||
struct oid *o_start_b, *o_end_b;
|
||||
o_start_b = (struct oid *) pkt;
|
||||
pkt += snmp_oid_size(o_start_b);
|
||||
o_end_b = (struct oid *) pkt;
|
||||
pkt += snmp_oid_size(o_end_b);
|
||||
snmp_log("HERE pkt after oids %p (end %p)", pkt, pkt + size);
|
||||
|
||||
/* advertised size of oid is greater then size of message */
|
||||
if (snmp_oid_size(o_start_b) > size || snmp_oid_size(o_end_b) > size)
|
||||
{
|
||||
snmp_log("too big o_start or o_end");
|
||||
snmp_log("o_start_b packet: %u o_end_b packet: %u packet size: %u",
|
||||
snmp_oid_size(o_start_b), snmp_oid_size(o_end_b), size);
|
||||
//err = -1; /* parse error too big n_subid (greater than message) */
|
||||
continue;
|
||||
}
|
||||
|
||||
snmp_oid_dump(o_start_b);
|
||||
snmp_oid_dump(o_end_b);
|
||||
|
||||
/* object identifier (oid) normalization */
|
||||
struct oid *o_start = snmp_prefixize(p, o_start_b, c.byte_ord);
|
||||
struct oid *o_end = snmp_prefixize(p, o_end_b, c.byte_ord);
|
||||
|
||||
snmp_oid_dump(o_start);
|
||||
snmp_oid_dump(o_end);
|
||||
|
||||
snmp_log("gets buffer start size %u, buffer end size %u, program start size %u, "
|
||||
"program end size %u", snmp_oid_size(o_start_b), snmp_oid_size(o_end_b),
|
||||
snmp_oid_size(o_start), snmp_oid_size(o_end));
|
||||
|
||||
// TODO handle NULL o_start and o_end
|
||||
|
||||
u8 mib_class = snmp_get_mib_class(o_start);
|
||||
|
||||
snmp_log("get mib_class () %d -> next pdu parsing ...", mib_class);
|
||||
|
||||
switch (h->type)
|
||||
{
|
||||
case AGENTX_GET_PDU:
|
||||
snmp_log("type Get-PDU");
|
||||
|
||||
/*
|
||||
struct snmp_error error = (struct snmp_error) {
|
||||
.oid = o_start,
|
||||
.type = AGENTX_NO_SUCH_OBJECT,
|
||||
};
|
||||
*/
|
||||
|
||||
//snmp_dump_packet(pkt, size);
|
||||
// TODO o_start NULL check
|
||||
//res_pkt = snmp_mib_fill(p, o_start, mib_class, res_pkt, rsize, &error, 0, byte_ord);
|
||||
tmp = snmp_mib_fill(p, o_start, mib_class, &c);
|
||||
//res_pkt = find_n_fill(p, o_start, res_pkt, rsize, 0, byte_ord);
|
||||
if (tmp)
|
||||
c.buffer = tmp;
|
||||
else
|
||||
{} // TODO
|
||||
|
||||
break;
|
||||
|
||||
case AGENTX_GET_NEXT_PDU:
|
||||
tmp = snmp_get_next(p, o_start, o_end, mib_class, &c);
|
||||
//res_pkt = snmp_get_next(p, o_start, o_end, res_pkt, rsize, 0, mib_class, byte_ord);
|
||||
if (tmp)
|
||||
c.buffer = tmp;
|
||||
else
|
||||
{} // TODO
|
||||
|
||||
break;
|
||||
|
||||
case AGENTX_GET_BULK_PDU:
|
||||
tmp = snmp_get_bulk(p, o_start, o_end, &bulk_state, &c);
|
||||
if (tmp)
|
||||
c.buffer = tmp;
|
||||
else
|
||||
{} // TODO
|
||||
|
||||
break;
|
||||
}
|
||||
|
||||
mb_free(o_start);
|
||||
mb_free(o_end);
|
||||
|
||||
ind++;
|
||||
}
|
||||
|
||||
snmp_log(" pasting size");
|
||||
response_err_ind(response_header, c.error, ind);
|
||||
update_packet_size(p, res, c.buffer);
|
||||
|
||||
snmp_log("ttx %p c.buffer - res %lu", p->sock->ttx, c.buffer - res);
|
||||
snmp_log("c.buffer %p res %p", c.buffer, res);
|
||||
snmp_log("dumping response packet (gets)");
|
||||
|
||||
//snmp_dump_packet(res, c.buffer - res);
|
||||
|
||||
// TODO need to send prepared packet here
|
||||
int ret = sk_send(sk, c.buffer - res);
|
||||
|
||||
if (ret == 0)
|
||||
snmp_log("sk_send sleep (gets)");
|
||||
else if (ret < 0)
|
||||
snmp_log("sk_send err %d (gets)", ret);
|
||||
else
|
||||
snmp_log("sk_send ok ! (gets)");
|
||||
|
||||
return pkt - pkt_start - AGENTX_HEADER_SIZE;
|
||||
}
|
||||
#endif
|
||||
|
||||
void
|
||||
snmp_start_subagent(struct snmp_proto *p)
|
||||
{
|
||||
snmp_log("snmp_start_subagent() starting subagent");
|
||||
snmp_log("DEBUG p->local_as %u", p->local_as);
|
||||
|
||||
/* blank oid means unsupported */
|
||||
/* Blank oid means unsupported */
|
||||
// TODO optional subagent identification
|
||||
struct oid *blank = snmp_oid_blank(p);
|
||||
open_pdu(p, blank);
|
||||
mb_free(blank);
|
||||
@ -1408,7 +1024,6 @@ void
|
||||
snmp_stop_subagent(struct snmp_proto *p)
|
||||
{
|
||||
snmp_log("snmp_stop_subagent() state %s", p->state);
|
||||
// sock *sk = p->sock;
|
||||
|
||||
if (p->state == SNMP_STOP)
|
||||
close_pdu(p, AGENTX_CLOSE_SHUTDOWN);
|
||||
@ -1419,36 +1034,15 @@ oid_prefix(struct oid *o, u32 *prefix, uint len)
|
||||
{
|
||||
for (uint i = 0; i < len; i++)
|
||||
if (o->ids[i] != prefix[i])
|
||||
return 0; // false
|
||||
return 0;
|
||||
|
||||
return 1; // true
|
||||
return 1;
|
||||
}
|
||||
|
||||
#if 0
|
||||
int
|
||||
snmp_rx(sock *sk, uint size)
|
||||
{
|
||||
snmp_log("snmp_rx()");
|
||||
struct snmp_proto *p = sk->data;
|
||||
byte *pkt = sk->rpos;
|
||||
|
||||
// 1 means all done; 0 means to be continued
|
||||
return parse_pkt(p, pkt, size);
|
||||
/*
|
||||
while (end >= pkt + AGENTX_HEADER_SIZE)
|
||||
{
|
||||
parse_header(p);
|
||||
parse_pkt(p, );
|
||||
}
|
||||
*/
|
||||
}
|
||||
#endif
|
||||
|
||||
int
|
||||
snmp_rx(sock *sk, uint size)
|
||||
{
|
||||
snmp_log("snmp_rx() size %u", size);
|
||||
//snmp_dump_packet(sk->tbuf, 64);
|
||||
struct snmp_proto *p = sk->data;
|
||||
byte *pkt_start = sk->rbuf;
|
||||
byte *end = pkt_start + size;
|
||||
@ -1460,8 +1054,6 @@ snmp_rx(sock *sk, uint size)
|
||||
*/
|
||||
uint skip = 0;
|
||||
|
||||
//snmp_dump_packet(pkt_start, size);
|
||||
|
||||
snmp_log("snmp_rx before loop");
|
||||
while (end >= pkt_start + AGENTX_HEADER_SIZE)
|
||||
{
|
||||
@ -1500,7 +1092,7 @@ snmp_rx(sock *sk, uint size)
|
||||
void
|
||||
snmp_ping(struct snmp_proto *p)
|
||||
{
|
||||
/* this does not support non-default context */
|
||||
/* this code does not support non-default context */
|
||||
sock *sk = p->sock;
|
||||
struct snmp_pdu_context c = {
|
||||
.buffer = sk->tpos,
|
||||
@ -1517,7 +1109,7 @@ snmp_ping(struct snmp_proto *p)
|
||||
p->packet_id++;
|
||||
SNMP_SESSION(h, p);
|
||||
|
||||
/* sending only header => pkt - buf */
|
||||
/* We send only the header */
|
||||
snmp_log("sending ping packet ...");
|
||||
uint s = update_packet_size(p, sk->tpos, c.buffer);
|
||||
int ret = sk_send(sk, s);
|
||||
@ -1535,61 +1127,6 @@ snmp_agent_reconfigure(void)
|
||||
{
|
||||
|
||||
}
|
||||
|
||||
static int
|
||||
compare(struct oid *left, struct oid *right)
|
||||
{
|
||||
const u32 INTERNET_PREFIX[] = {1, 3, 6, 1};
|
||||
|
||||
if (left->prefix == 0 && right->prefix == 0)
|
||||
goto test_ids;
|
||||
|
||||
if (right->prefix == 0)
|
||||
{
|
||||
struct oid *temp = left;
|
||||
left = right;
|
||||
right = temp;
|
||||
}
|
||||
|
||||
if (left->prefix == 0)
|
||||
{
|
||||
for (int i = 0; i < 4; i++)
|
||||
if (left->ids[i] < INTERNET_PREFIX[i])
|
||||
return -1;
|
||||
else if (left->ids[i] > INTERNET_PREFIX[i])
|
||||
return 1;
|
||||
|
||||
for (int i = 0; i < MIN(left->n_subid - 4, right->n_subid); i++)
|
||||
if (left->ids[i + 4] < right->ids[i])
|
||||
return -1;
|
||||
else if (left->ids[i + 4] > right->ids[i])
|
||||
return 1;
|
||||
|
||||
goto all_same;
|
||||
}
|
||||
|
||||
if (left->prefix < right->prefix)
|
||||
return -1;
|
||||
else if (left->prefix > right->prefix)
|
||||
return 1;
|
||||
|
||||
test_ids:
|
||||
for (int i = 0; i < MIN(left->n_subid, right->n_subid); i++)
|
||||
if (left->ids[i] < right->ids[i])
|
||||
return -1;
|
||||
else if (left->ids[i] > right->ids[i])
|
||||
return 1;
|
||||
|
||||
all_same:
|
||||
/ * shorter sequence is before longer in lexicografical order * /
|
||||
if (left->n_subid < right->n_subid)
|
||||
return -1;
|
||||
else if (left->n_subid > right->n_subid)
|
||||
return 1;
|
||||
else
|
||||
return 0;
|
||||
}
|
||||
|
||||
*/
|
||||
|
||||
static inline int
|
||||
@ -1683,7 +1220,8 @@ search_mib(struct snmp_proto *p, const struct oid *o_start, const struct oid *o_
|
||||
break;
|
||||
}
|
||||
|
||||
//mb_free(blank);
|
||||
if (o_end == blank)
|
||||
mb_free((void *) o_end);
|
||||
return o_curr;
|
||||
}
|
||||
|
||||
@ -1715,12 +1253,12 @@ snmp_prefixize(struct snmp_proto *proto, const struct oid *oid, int byte_ord)
|
||||
|
||||
if (snmp_is_oid_empty(oid))
|
||||
{
|
||||
/* allocate new zeroed oid */
|
||||
/* Allocate new zeroed oid */
|
||||
snmp_log("blank");
|
||||
return snmp_oid_blank(proto);
|
||||
}
|
||||
|
||||
/* already in prefixed form */
|
||||
/* The oid is already in prefixed form */
|
||||
else if (oid->prefix != 0) {
|
||||
struct oid *new = snmp_oid_duplicate(proto->p.pool, oid);
|
||||
snmp_log("already prefixed");
|
||||
@ -1728,29 +1266,23 @@ snmp_prefixize(struct snmp_proto *proto, const struct oid *oid, int byte_ord)
|
||||
}
|
||||
|
||||
if (oid->n_subid < 5)
|
||||
{ snmp_log("too small"); return NULL; }
|
||||
return NULL;
|
||||
|
||||
for (int i = 0; i < 4; i++)
|
||||
if (LOAD_U32(oid->ids[i], byte_ord) != prefix[i])
|
||||
{ snmp_log("different prefix"); return NULL; }
|
||||
|
||||
/* validity check here */
|
||||
/* Interval validity check */
|
||||
if (oid->ids[4] >= 256)
|
||||
{ snmp_log("outside byte first id"); return NULL; }
|
||||
|
||||
struct oid *new = mb_alloc(proto->p.pool,
|
||||
sizeof(struct oid) + MAX((oid->n_subid - 5) * sizeof(u32), 0));
|
||||
/*
|
||||
snmp_log(" new %p new->ids %p &new->ids %p oid %p oid->ids %p oid->ids[5] %p"
|
||||
"&oid->ids[5] %p &(oid->ids[5]) %p", new, new->ids, &new->ids, oid, oid->ids,
|
||||
oid->ids[5], &oid->ids[5], &(oid->ids[5]));
|
||||
*/
|
||||
|
||||
memcpy(new, oid, sizeof(struct oid));
|
||||
new->n_subid = oid->n_subid - 5;
|
||||
|
||||
/* validity check before allocation => ids[4] < 256
|
||||
* and can be copied to one byte new->prefix */
|
||||
/* We validated the fifth identifier, we can safely use it as prefix */
|
||||
new->prefix = oid->ids[4];
|
||||
|
||||
memcpy(&new->ids, &oid->ids[5], new->n_subid * sizeof(u32));
|
||||
@ -1765,10 +1297,7 @@ snmp_mib_fill2(struct snmp_proto *p, struct oid *oid,
|
||||
|
||||
if (c->size < snmp_varbind_hdr_size_from_oid(oid))
|
||||
{
|
||||
// FIXME need more mem
|
||||
snmp_log("snmp_mib_fill2() need more memory in TX buffer, returning with GEN_ERROR");
|
||||
c->error = AGENTX_RES_GEN_ERROR;
|
||||
return;
|
||||
snmp_manage_tbuf(p, c);
|
||||
}
|
||||
|
||||
struct agentx_varbind *vb = snmp_create_varbind(c->buffer, oid);
|
||||
@ -1795,39 +1324,6 @@ snmp_mib_fill2(struct snmp_proto *p, struct oid *oid,
|
||||
}
|
||||
}
|
||||
|
||||
#if 0
|
||||
/**
|
||||
* snmp_mib_fill -
|
||||
*/
|
||||
static byte *
|
||||
snmp_mib_fill(struct snmp_proto UNUSED *p, struct oid *oid, u8 mib_class,
|
||||
struct snmp_pdu_context *c)
|
||||
{
|
||||
ASSERT(oid != NULL);
|
||||
snmp_log("snmp_mib_fill()");
|
||||
|
||||
struct agentx_varbind *vb = snmp_create_varbind(c->buffer, oid);
|
||||
/* SNMPv2 mgmt mib-2 */
|
||||
if (oid->n_subid < 2 || (oid->prefix != 2 && oid->ids[0] != 1))
|
||||
{
|
||||
vb->type = AGENTX_NO_SUCH_OBJECT;
|
||||
return c->buffer + snmp_varbind_header_size(vb);
|
||||
}
|
||||
|
||||
//byte *last = c->buffer;
|
||||
switch (mib_class)
|
||||
{
|
||||
case SNMP_CLASS_BGP:
|
||||
//return snmp_bgp_fill(p, vb, c);
|
||||
return NULL;
|
||||
|
||||
default:
|
||||
return NULL;
|
||||
}
|
||||
return NULL;
|
||||
}
|
||||
#endif
|
||||
|
||||
/**
|
||||
*
|
||||
* Important note: After managing insufficient buffer size all in buffer pointers
|
||||
@ -1847,7 +1343,6 @@ void
|
||||
snmp_tx(sock UNUSED *sk)
|
||||
{
|
||||
snmp_log("snmp_tx() hook");
|
||||
//struct snmp_proto *p = sk->data;
|
||||
|
||||
return;
|
||||
}
|
||||
@ -1867,7 +1362,7 @@ prepare_response(struct snmp_proto *p, struct snmp_pdu_context *c)
|
||||
SNMP_BLANK_HEADER(h, AGENTX_RESPONSE_PDU);
|
||||
SNMP_SESSION(h, p);
|
||||
|
||||
/* protocol doesn't care about subagent upTime */
|
||||
/* AgentX protocol does not care about subagent upTime */
|
||||
STORE_U32(r->uptime, 0);
|
||||
STORE_U16(r->error, AGENTX_RES_NO_ERROR);
|
||||
STORE_U16(r->index, 0);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user