asn_t *
snmp_get_ifSpecific (snmp_t *snmp, unsigned nif, ...)
{
if (! find_netif (snmp->ip->route, nif))
return 0;
return asn_make_oid (snmp->pool, ".0.0");
}
asn_t *
snmp_next_ifSpecific (snmp_t *snmp, bool_t nextflag, unsigned *nif, ...)
{
if (nextflag)
++*nif;
else
*nif = 1;
if (! find_netif (snmp->ip->route, *nif))
return 0;
return asn_make_oid (snmp->pool, ".0.0");
}
/*
* Send trap, SNMP v1 (RFC 1157).
* SEQUENCE {
* version: INTEGER [=0]
* community: STRING
* pdu: SEQUENCE [=TRAP] {
* enterprise: OBJECT IDENTIFIER
* agent-addr: NetworkAddress
* generic-trap: INTEGER
* specific-trap: INTEGER
* time-stamp: INTEGER
* varlist: SEQUENCE {
* var1: SEQUENCE {
* name: OID
* value: ...
* }
* ...
* } } }
*/
bool_t
snmp_trap_v1 (snmp_t *snmp, udp_socket_t *sock, unsigned char *local_ip,
unsigned trap_type, asn_t *oid, asn_t *value)
{
asn_t *pdu, *trap, *varlist, *var1;
buf_t *pkt;
unsigned char *output, status;
unsigned long santisec;
/*debug_printf ("snmp_trap(%#x)\n", traptype);*/
if (oid) {
var1 = asn_make_seq (snmp->pool, 2, ASN_SEQUENCE);
if (! var1) {
asn_free (oid);
asn_free (value);
return 0;
}
var1->seq.count = 2;
var1->seq.arr[0] = oid;
var1->seq.arr[1] = value;
} else
var1 = 0;
/*
* List of variables.
*/
varlist = asn_make_seq (snmp->pool, 1, ASN_SEQUENCE);
if (! varlist) {
asn_free (var1);
return 0;
}
varlist->seq.count = var1 ? 1 : 0;
varlist->seq.arr[0] = var1;
/*
* Protocol data unit.
*/
pdu = asn_make_seq (snmp->pool, 6, ASN_TRAP);
if (! pdu) {
asn_free (varlist);
return 0;
}
pdu->seq.count = 6;
pdu->seq.arr[5] = varlist;
/* Enterprise */
pdu->seq.arr[0] = asn_make_oid (snmp->pool, "1.3.6.1.4.1.20520");
pdu->seq.arr[0]->oid.id[6] = snmp->enterprise;
/* Agent IP address */
pdu->seq.arr[1] = asn_make_int (snmp->pool,
NTOHL (*(unsigned long*) local_ip), ASN_IP_ADDRESS);
/* Generic trap code */
pdu->seq.arr[2] = asn_make_int (snmp->pool, trap_type & 0xff,
ASN_INTEGER);
/* Specific trap code */
pdu->seq.arr[3] = asn_make_int (snmp->pool, trap_type >> 8,
ASN_INTEGER);
/* Timestamp */
santisec = 0;
if (snmp->ip && snmp->ip->timer) {
unsigned long msec;
unsigned days = timer_days (snmp->ip->timer, &msec);
santisec = msec / 10 + days * 24L * 60 * 60 * 100;
}
pdu->seq.arr[4] = asn_make_int (snmp->pool, santisec, ASN_TIME_TICKS);
/*
* Trap.
*/
trap = asn_make_seq (snmp->pool, 3, ASN_SEQUENCE);
if (! trap) {
asn_free (pdu);
return 0;
}
trap->seq.count = 3;
trap->seq.arr[2] = pdu;
/* Version */
trap->seq.arr[0] = asn_make_int (snmp->pool, 0, ASN_INTEGER);
/* Community */
trap->seq.arr[1] = asn_make_string (snmp->pool, snmp->trap_community);
/* Encode and send */
status = 0;
pkt = buf_alloc (snmp->pool, TRAP_PACKET_SIZE, 50);
if (pkt) {
output = asn_encode (trap, pkt->payload + pkt->len, pkt->len);
if (! output) {
buf_free (pkt);
} else {
/* Send */
assert (output >= pkt->payload);
buf_add_header (pkt, - (output - pkt->payload));
/* debug_dump ("trap-v1", pkt->payload, pkt->len); */
status = udp_sendto (sock, pkt, snmp->trap_addr, 162);
++snmp->out_traps;
++snmp->out_pkts;
}
}
asn_free (trap);
return status;
}
