/*
* tcpConnTable MIB architecture support for OpenBSD
*/
#include <net-snmp/net-snmp-config.h>
#include <net-snmp/net-snmp-includes.h>
#include <net-snmp/agent/net-snmp-agent-includes.h>
#include <net-snmp/data_access/tcpConn.h>
#include <net-snmp/agent/auto_nlist.h>
#include "tcp-mib/tcpConnectionTable/tcpConnectionTable_constants.h"
#include "tcp-mib/data_access/tcpConn_private.h"
#include "mibII/mibII_common.h"
#if HAVE_NETINET_TCP_H
#include <netinet/tcp.h>
#endif
#if HAVE_NETINET_TCP_TIMER_H
#include <netinet/tcp_timer.h>
#endif
#if HAVE_NETINET_TCPIP_H
#include <netinet/tcpip.h>
#endif
#if HAVE_NETINET_TCP_VAR_H
#include <netinet/tcp_var.h>
#endif
#if HAVE_KVM_GETFILES
#if defined(HAVE_KVM_GETFILE2) || !defined(openbsd5)
#undef HAVE_KVM_GETFILES
#endif
#endif
#if HAVE_KVM_GETFILES
#include <kvm.h>
#include <sys/sysctl.h>
#define _KERNEL /* for DTYPE_SOCKET */
#include <sys/file.h>
#undef _KERNEL
#endif
#ifdef HAVE_KVM_GETFILES
static int _kvmload(netsnmp_container *container, u_int flags);
#else
static int _load(netsnmp_container *container, u_int flags);
#endif
/*
* initialize arch specific storage
*
* @retval 0: success
* @retval <0: error
*/
int
netsnmp_arch_tcpconn_entry_init(netsnmp_tcpconn_entry *entry)
{
/*
* init
*/
return 0;
}
/*
* cleanup arch specific storage
*/
void
netsnmp_arch_tcpconn_entry_cleanup(netsnmp_tcpconn_entry *entry)
{
/*
* cleanup
*/
}
/*
* copy arch specific storage
*/
int
netsnmp_arch_tcpconn_entry_copy(netsnmp_tcpconn_entry *lhs,
netsnmp_tcpconn_entry *rhs)
{
return 0;
}
/*
* delete an entry
*/
int
netsnmp_arch_tcpconn_entry_delete(netsnmp_tcpconn_entry *entry)
{
if (NULL == entry)
return -1;
/** xxx-rks:9 tcpConn delete not implemented */
return -1;
}
/**
*
* @retval 0 no errors
* @retval !0 errors
*/
int
netsnmp_arch_tcpconn_container_load(netsnmp_container *container,
u_int load_flags )
{
int rc = 0;
DEBUGMSGTL(("access:tcpconn:container",
"tcpconn_container_arch_load (flags %x)\n", load_flags));
if (NULL == container) {
snmp_log(LOG_ERR, "no container specified/found for access_tcpconn\n");
return -1;
}
#ifdef HAVE_KVM_GETFILES
rc = _kvmload(container, load_flags);
#else
rc = _load(container, load_flags);
#endif
return rc;
}
#ifdef HAVE_KVM_GETFILES
/**
*
* @retval 0 no errors
* @retval !0 errors
*/
static int
_kvmload(netsnmp_container *container, u_int load_flags)
{
int StateMap[] = { 1, 2, 3, 4, 5, 8, 6, 10, 9, 7, 11 };
netsnmp_tcpconn_entry *entry;
struct kinfo_file *kf;
int count;
int state;
int rc = 0;
kf = kvm_getfiles(kd, KERN_FILE_BYFILE, DTYPE_SOCKET, sizeof(struct kinfo_file), &count);
while (count--) {
if (kf->so_protocol != IPPROTO_TCP)
goto skip;
state = StateMap[kf->t_state];
if (load_flags) {
if (state == TCPCONNECTIONSTATE_LISTEN) {
if (load_flags & NETSNMP_ACCESS_TCPCONN_LOAD_NOLISTEN) {
DEBUGMSGT(("verbose:access:tcpconn:container",
" skipping listen\n"));
goto skip;
}
}
else if (load_flags & NETSNMP_ACCESS_TCPCONN_LOAD_ONLYLISTEN) {
DEBUGMSGT(("verbose:access:tcpconn:container",
" skipping non-listen\n"));
goto skip;
}
}
#if !defined(NETSNMP_ENABLE_IPV6)
if (kf->so_family == AF_INET6)
goto skip;
#endif
entry = netsnmp_access_tcpconn_entry_create();
if(NULL == entry) {
rc = -3;
break;
}
/** oddly enough, these appear to already be in network order */
entry->loc_port = ntohs(kf->inp_lport);
entry->rmt_port = ntohs(kf->inp_fport);
entry->tcpConnState = StateMap[kf->t_state];
entry->pid = kf->p_pid;
/** the addr string may need work */
if (kf->so_family == AF_INET6) {
entry->loc_addr_len = entry->rmt_addr_len = 16;
memcpy(entry->loc_addr, &kf->inp_laddru, 16);
memcpy(entry->rmt_addr, &kf->inp_faddru, 16);
}
else {
entry->loc_addr_len = entry->rmt_addr_len = 4;
memcpy(entry->loc_addr, &kf->inp_laddru, 4);
memcpy(entry->rmt_addr, &kf->inp_faddru, 4);
}
DEBUGMSGTL(("tcp-mib/data_access", "tcp %d %d %d\n",
entry->loc_addr_len, entry->loc_port, entry->rmt_port));
/*
* add entry to container
*/
entry->arbitrary_index = CONTAINER_SIZE(container) + 1;
CONTAINER_INSERT(container, entry);
skip:
kf++;
}
if (rc < 0)
return rc;
return 0;
}
#else /* HAVE_KVM_GETFILES */
/**
*
* @retval 0 no errors
* @retval !0 errors
*/
static int
_load(netsnmp_container *container, u_int load_flags)
{
struct inpcbtable table;
struct inpcb *head, *next, *prev;
struct inpcb inpcb;
struct tcpcb tcpcb;
int StateMap[] = { 1, 2, 3, 4, 5, 8, 6, 10, 9, 7, 11 };
netsnmp_tcpconn_entry *entry;
int state;
int rc = 0;
/*
* Read in the buffer containing the TCP table data
*/
if (!auto_nlist(TCP_SYMBOL, (char *)&table, sizeof(table))) {
DEBUGMSGTL(("tcp-mib/tcpConn_openbsd", "Failed to read tcp_symbol\n"));
return -1;
}
prev = (struct inpcb *)&CIRCLEQ_FIRST(&table.inpt_queue);
prev = NULL;
head = next = CIRCLEQ_FIRST(&table.inpt_queue);
while (next) {
if (!NETSNMP_KLOOKUP(next, (char *)&inpcb, sizeof(inpcb))) {
DEBUGMSGTL(("tcp-mib/data_access/tcpConn", "klookup inpcb failed\n"));
break;
}
if (prev && CIRCLEQ_PREV(&inpcb, inp_queue) != prev) {
snmp_log(LOG_ERR,"tcbtable link error\n");
break;
}
prev = next;
next = CIRCLEQ_NEXT(&inpcb, inp_queue);
if (!NETSNMP_KLOOKUP(inpcb.inp_ppcb, (char *)&tcpcb, sizeof(tcpcb))) {
DEBUGMSGTL(("tcp-mib/data_access/tcpConn", "klookup tcpcb failed\n"));
break;
}
state = StateMap[tcpcb.t_state];
if (load_flags) {
if (state == TCPCONNECTIONSTATE_LISTEN) {
if (load_flags & NETSNMP_ACCESS_TCPCONN_LOAD_NOLISTEN) {
DEBUGMSGT(("verbose:access:tcpconn:container",
" skipping listen\n"));
goto skip;
}
}
else if (load_flags & NETSNMP_ACCESS_TCPCONN_LOAD_ONLYLISTEN) {
DEBUGMSGT(("verbose:access:tcpconn:container",
" skipping non-listen\n"));
goto skip;
}
}
#if !defined(NETSNMP_ENABLE_IPV6)
if (inpcb.inp_flags & INP_IPV6)
goto skip;
#endif
entry = netsnmp_access_tcpconn_entry_create();
if(NULL == entry) {
rc = -3;
break;
}
/** oddly enough, these appear to already be in network order */
entry->loc_port = ntohs(inpcb.inp_lport);
entry->rmt_port = ntohs(inpcb.inp_fport);
entry->tcpConnState = state;
entry->pid = 0;
/** the addr string may need work */
if (inpcb.inp_flags & INP_IPV6) {
entry->loc_addr_len = entry->rmt_addr_len = 16;
memcpy(entry->loc_addr, &inpcb.inp_laddr6, 16);
memcpy(entry->rmt_addr, &inpcb.inp_faddr6, 16);
}
else {
entry->loc_addr_len = entry->rmt_addr_len = 4;
memcpy(entry->loc_addr, &inpcb.inp_laddr, 4);
memcpy(entry->rmt_addr, &inpcb.inp_faddr, 4);
}
DEBUGMSGTL(("tcp-mib/data_access", "tcp %d %d %d\n",
entry->loc_addr_len, entry->loc_port, entry->rmt_port));
/*
* add entry to container
*/
entry->arbitrary_index = CONTAINER_SIZE(container) + 1;
CONTAINER_INSERT(container, entry);
skip:
if (head == next)
break;
}
if(rc<0)
return rc;
return 0;
}
#endif /* HAVE_KVM_GETFILES */