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333 lines
8.7 KiB
C
333 lines
8.7 KiB
C
#ifndef _BIRD_SNMP_SUBAGENT_H_
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#define _BIRD_SNMP_SUBAGENT_H_
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#include "nest/bird.h"
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#include "snmp.h"
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void snmp_start_subagent(struct snmp_proto *p);
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void snmp_stop_subagent(struct snmp_proto *p);
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void snmp_ping(struct snmp_proto *p);
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#define AGENTX_VERSION 1
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#define SNMP_STATE_START 0
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#define SNMP_STATE_BGP 1
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#define SNMP_STATE_INVALID 2
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#define SNMP_MIB_2 1 /* last of oid .1.3.6.1.2.1 */
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#define SNMP_OSPF_MIB 14 /* part of oid .1.3.6.1.2.1.14 */
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#define SNMP_BGP4_MIB 15 /* part of oid .1.3.6.1.2.1.15 */
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#define SNMP_OSPFv3_MIB 192 /* part of oid .1.3.6.1.2.1.192 */
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enum SNMP_CLASSES {
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SNMP_CLASS_INVALID = 0,
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SNMP_CLASS_BGP = 1,
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SNMP_CLASS_OSPF,
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SNMP_CLASS_END,
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};
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#define BGP4_VERSIONS ((char[]) { 0x10 })
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enum agentx_type {
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AGENTX_INTEGER = 2,
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AGENTX_OCTET_STRING = 4,
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AGENTX_NULL = 5,
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AGENTX_OBJECT_ID = 6,
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AGENTX_IP_ADDRESS = 64,
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AGENTX_COUNTER_32 = 65,
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AGENTX_GAUGE_32 = 66,
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AGENTX_TIME_TICKS = 67,
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AGENTX_OPAQUE = 68,
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AGENTX_COUNTER_64 = 70,
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AGENTX_NO_SUCH_OBJECT = 128,
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AGENTX_NO_SUCH_INSTANCE = 129,
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AGENTX_END_OF_MIB_VIEW = 130,
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} PACKED;
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enum snmp_search_res {
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SNMP_SEARCH_OK = 0,
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SNMP_SEARCH_NO_OBJECT = 1,
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SNMP_SEARCH_NO_INSTANCE = 2,
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SNMP_SEARCH_END_OF_VIEW = 3,
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};
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#define AGENTX_ADMIN_STOP 1
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#define AGENTX_ADMIN_START 2
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#define AGENTX_PRIORITY 127
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#define MAX_STR 0xFFFFFFFF
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#define SNMP_NATIVE
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#ifdef SNMP_NATIVE
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#define STORE_U32(dest, val) ((dest) = (u32) (val))
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#define STORE_U16(dest, val) ((dest) = (u16) (val))
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#define STORE_U8(dest, val) ((dest) = (u8) (val))
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#define STORE_PTR(ptr, val) (*((u32 *) (ptr)) = (u32) (val))
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#else
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#define STORE_U32(dest, val) put_u32(&(dest), (val))
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#define STORE_U16(dest, val) put_u16(&(dest), (val))
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#define STORE_U8(dest, val) put_u8(&(dest), (val))
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#define STORE_PTR(ptr, val) put_u32(ptr, val)
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#endif
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/* storing byte (u8) is always the same */
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#define SNMP_HEADER_(h, v, t, f) \
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put_u8(&h->version, v); \
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put_u8(&h->type, t); \
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put_u8(&h->flags, f); \
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put_u8(&h->pad, 0);
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#ifdef SNMP_NATIVE
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#define SNMP_HEADER(h,t,f) SNMP_HEADER_(h, AGENTX_VERSION, t, f)
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#else
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#define SNMP_HEADER(h,t,f) \
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SNMP_HEADER_(h, AGENTX_VERSION, t, f | SNMP_NETWORK_BYTE_ORDER)
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#endif
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#define SNMP_B_HEADER(h, t) SNMP_HEADER(h, t, AGENTX_FLAG_BLANK)
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#define SNMP_BLANK_HEADER(h, t) SNMP_HEADER(h, t, AGENTX_FLAG_BLANK)
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#define SNMP_CREATE(b, t, n) \
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n = (void *) (b); \
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memset(n, 0, sizeof(t)); \
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(b) += sizeof(t);
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#define SNMP_SESSION(h, p) \
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STORE_U32(h->session_id, p->session_id); \
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STORE_U32(h->transaction_id, p->transaction_id); \
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STORE_U32(h->packet_id, p->packet_id)
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#define LOAD(v, bo) ((bo) ? get_u32(&v) : (u32) (v))
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#define LOAD_16(v, bo) ((bo) ? get_u16(&v) : (u16) (v))
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#define LOAD_PTR(v, bo) ((bo) ? get_u32(v) : (u32) *(v))
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#define LOAD_STR(p, b, s, l, bo) \
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l = LOAD(*((u32 *) b), bo); \
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log(L_INFO "LOAD_STR(), %p %u", p->p.pool, l + 1); \
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s = mb_alloc(p->p.pool, l + 1); \
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memcpy(s, b, l); \
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s[l] = '\0'; /* set term. char */ \
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b += snmp_str_size(s);
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#define SNMP_LOAD_CONTEXT(p, h, b, s, l) \
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if (h->flags & AGENTX_NON_DEFAULT_CONTEXT) \
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{ log(L_INFO "encountered non-default context"); \
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LOAD_STR(p, b, s, l, h->flags & AGENTX_NETWORK_BYTE_ORDER); }
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#define SNMP_COPY_OID(b, o) \
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memcpy(b, o, snmp_oid_size(o)); \
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b += snmp_oid_size(o);
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#define SNMP_COPY_VB(b, s, e) \
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memcpy(b, s, 4); \
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b += 4; \
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SNMP_COPY_OID(b, &s->name) \
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SNMP_COPY_OID(b, e)
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#define BGP_DATA_(varbind, type_, packet, offset) \
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(varbind)->type = type_; \
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packet += offset;
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#define SNMP_PUT_OID(buf, size, oid, byte_ord) \
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({ \
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struct agentx_varbind *vb = (void *) buf; \
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SNMP_FILL_VARBIND(vb, oid, byte_ord); \
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})
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#define SNMP_FILL_VARBIND(vb, oid, byte_ord) \
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snmp_oid_copy(&(vb)->name, (oid), (byte_ord)), snmp_oid_size((oid))
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#define SNMP_VB_DATA(varbind) \
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(((void *)(varbind)) + snmp_varbind_header_size(varbind))
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struct agentx_header {
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u8 version;
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u8 type;
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u8 flags;
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u8 pad;
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u32 session_id;
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u32 transaction_id;
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u32 packet_id;
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u32 payload; /* length of the packet without header */
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};
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#define AGENTX_HEADER_SIZE sizeof(struct agentx_header)
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struct oid {
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u8 n_subid;
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u8 prefix;
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u8 include;
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u8 pad;
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u32 ids[];
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};
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struct agentx_varbind {
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u16 type;
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u16 pad;
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/* oid part */
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struct oid name;
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};
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/* this does not work */
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struct agentx_search_range {
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struct oid start;
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struct oid end;
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};
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struct agentx_getbulk {
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u16 non_repeaters;
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u16 max_repetitions;
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};
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struct agentx_response {
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struct agentx_header h;
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u32 uptime;
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u16 err;
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u16 index;
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};
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struct agentx_close_pdu {
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struct agentx_header h;
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u8 reason;
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};
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struct agentx_un_register_pdu {
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struct agentx_header h;
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u8 timeout;
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u8 priority;
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u8 range_subid;
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u8 padd;
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};
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struct agentx_bulk_state {
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struct agentx_getbulk getbulk;
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u16 index;
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u16 repetition;
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byte* packet;
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u16 failed;
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};
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struct snmp_error {
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struct oid *oid;
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uint type;
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};
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enum agentx_pdu {
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AGENTX_OPEN_PDU = 1,
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AGENTX_CLOSE_PDU = 2,
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AGENTX_REGISTER_PDU = 3,
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AGENTX_UNREGISTER_PDU = 4,
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AGENTX_GET_PDU = 5,
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AGENTX_GET_NEXT_PDU = 6,
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AGENTX_GET_BULK_PDU = 7,
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AGENTX_TEST_SET_PDU = 8,
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AGENTX_COMMIT_SET_PDU = 9,
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AGENTX_UNDO_SET_PDU = 10,
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AGENTX_CLEANUP_SET_PDU = 11,
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AGENTX_NOTIFY_PDU = 12,
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AGENTX_PING_PDU = 13,
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AGENTX_INDEX_ALLOCATE_PDU = 14,
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AGENTX_INDEX_DEALLOCATE_PDU = 15,
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AGENTX_ADD_AGENT_CAPS_PDU = 16,
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AGENTX_REMOVE_AGENT_CAPS_PDU = 17,
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AGENTX_RESPONSE_PDU = 18,
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} PACKED;
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#define AGENTX_FLAGS_MASK 0x1F
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enum agentx_flags {
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AGENTX_FLAG_BLANK = 0x00,
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AGENTX_FLAG_INSTANCE_REGISTRATION = 0x01,
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AGENTX_FLAG_NEW_INDEX = 0x02,
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AGENTX_FLAG_ANY_INDEX = 0x04,
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AGENTX_NON_DEFAULT_CONTEXT = 0x08,
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AGENTX_NETWORK_BYTE_ORDER = 0x10,
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} PACKED;
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/* CLOSE_PDU close reasons */
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enum agentx_close_reasons {
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AGENTX_CLOSE_OTHER = 1,
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AGENTX_CLOSE_PARSE_ERROR = 2,
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AGENTX_CLOSE_PROTOCOL_ERROR = 3,
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AGENTX_CLOSE_TIMEOUTS = 4,
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AGENTX_CLOSE_SHUTDOWN = 5,
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AGENTX_CLOSE_BY_MANAGER = 6,
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} PACKED;
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/* RESPONSE_PDU - result error */
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enum agentx_response_err {
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AGENTX_RES_NO_ERROR = 0,
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/* TEST_SET_PDU response errors */
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AGENTX_RES_GEN_ERROR = 5,
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AGENTX_RES_NO_ACCESS = 6,
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AGENTX_RES_WRONG_TYPE = 7,
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AGENTX_RES_WRONG_LENGTH = 8,
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AGENTX_RES_WRONG_ENCODING = 9,
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AGENTX_RES_WRONG_VALUE = 10,
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AGENTX_RES_NO_CREATION = 11,
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AGENTX_RES_INCONSISTENT_VALUE = 12,
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AGENTX_RES_RESOURCE_UNAVAILABLE = 13,
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AGENTX_RES_NOT_WRITEABLE = 17,
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AGENTX_RES_INCONSISTENT_NAME = 18,
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/* end of TEST_SET_PDU resonse errs */
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AGENTX_RES_OPEN_FAILED = 256,
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AGENTX_RES_NOT_OPEN = 257,
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AGENTX_RES_INDEX_WRONG_TYPE = 258,
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AGENTX_RES_INDEX_ALREADY_ALLOC = 259,
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AGENTX_RES_INDEX_NONE_AVAIL = 260,
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AGENTX_RES_NOT_ALLOCATED = 261,
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AGENTX_RES_UNSUPPORTED_CONTEXT = 262,
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AGENTX_RES_DUPLICATE_REGISTER = 263,
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AGENTX_RES_UNKNOWN_REGISTER = 264,
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AGENTX_RES_UNKNOWN_AGENT_CAPS = 265,
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AGENTX_RES_PARSE_ERROR = 266,
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AGENTX_RES_REQUEST_DENIED = 267,
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AGENTX_RES_PROCESSING_ERR = 268,
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} PACKED;
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struct agentx_context {
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char *context; /* string name of this context */
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uint length; /* normal strlen() size */
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/* add buffered context hash? */
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};
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struct snmp_pdu_context {
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byte *buffer; /* pointer to buffer */
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uint size; /* unused space in buffer */
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uint context; /* context hash */
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int byte_ord; /* flag signaling NETWORK_BYTE_ORDER */
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enum agentx_response_err error; /* storage for result of current action */
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};
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struct agentx_alloc_context {
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u8 is_instance; /* flag INSTANCE_REGISTRATION */
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u8 new_index; /* flag NEW_INDEX */
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u8 any_index; /* flag ANY_INDEX */
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char *context; /* context to allocate in */
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uint clen; /* length of context string */
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};
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struct additional_buffer {
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node n;
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byte *buf; /* pointer to buffer data */
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byte *pos; /* position of first unused byte */
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};
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int snmp_rx(sock *sk, uint size);
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int snmp_rx_stop(sock *sk, uint size);
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void snmp_down(struct snmp_proto *p);
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void snmp_register(struct snmp_proto *p, struct oid *oid, uint index, uint len);
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void snmp_unregister(struct snmp_proto *p, struct oid *oid, uint index, uint len);
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void snmp_manage_tbuf(struct snmp_proto *p, struct snmp_pdu_context *c);
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struct oid *snmp_prefixize(struct snmp_proto *p, const struct oid *o, int byte_ord);
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u8 snmp_get_mib_class(const struct oid *oid);
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// debug wrapper
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#define snmp_log(...) log(L_INFO "snmp " __VA_ARGS__)
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#endif
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