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/*
* tcpConnTable MIB architecture support
*
* $Id: tcpConn_linux.c 15654 2006-12-08 14:30:56Z rstory $
*/
#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 "tcp-mib/tcpConnectionTable/tcpConnectionTable_constants.h"
#include "tcp-mib/data_access/tcpConn_private.h"
static int
linux_states[12] = { 1, 5, 3, 4, 6, 7, 11, 1, 8, 9, 2, 10 };
static int _load4(netsnmp_container *container, u_int flags);
#if defined (NETSNMP_ENABLE_IPV6)
static int _load6(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_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 %p)\n", load_flags));
if (NULL == container) {
snmp_log(LOG_ERR, "no container specified/found for access_tcpconn\n");
return -1;
}
rc = _load4(container, load_flags);
#if defined (NETSNMP_ENABLE_IPV6)
if((0 != rc) || (load_flags & NETSNMP_ACCESS_TCPCONN_LOAD_IPV4_ONLY))
return rc;
/*
* load ipv6. ipv6 module might not be loaded,
* so ignore -2 err (file not found)
*/
rc = _load6(container, load_flags);
if (-2 == rc)
rc = 0;
#endif
return rc;
}
/**
*
* @retval 0 no errors
* @retval !0 errors
*/
static int
_load4(netsnmp_container *container, u_int load_flags)
{
int rc = 0;
FILE *in;
char line[160];
netsnmp_assert(NULL != container);
#define PROCFILE "/proc/net/tcp"
if (!(in = fopen(PROCFILE, "r"))) {
snmp_log(LOG_ERR,"could not open " PROCFILE "\n");
return -2;
}
fgets(line, sizeof(line), in); /* skip header */
/*
* sl local_address rem_address st tx_queue rx_queue tr tm->when retrnsmt uid timeout inode
* 0: 00000000:8000 00000000:0000 0A 00000000:00000000 00:00000000 00000000 29 0 1028 1 df7b1b80 300 0 0 2 -1
*/
while (fgets(line, sizeof(line), in)) {
netsnmp_tcpconn_entry *entry;
int state, rc, local_port, remote_port, tmp_state;
size_t buf_len, offset;
u_char local_addr[10], remote_addr[10];
u_char *tmp_ptr;
if (5 != (rc = sscanf(line, "%*d: %8[0-9A-Z]:%x %8[0-9A-Z]:%x %x",
local_addr, &local_port,
remote_addr, &remote_port, &tmp_state))) {
DEBUGMSGT(("access:tcpconn:container",
"error parsing line (%d != 5)\n", rc));
DEBUGMSGT(("access:tcpconn:container"," line '%s'\n", line));
continue;
}
DEBUGMSGT(("verbose:access:tcpconn:container"," line '%s'\n", line));
/*
* check if we care about listen state
*/
state = (tmp_state & 0xf) < 12 ? linux_states[tmp_state & 0xf] : 2;
if (load_flags) {
if (TCPCONNECTIONSTATE_LISTEN == state) {
if (load_flags & NETSNMP_ACCESS_TCPCONN_LOAD_NOLISTEN) {
DEBUGMSGT(("verbose:access:tcpconn:container",
" skipping listen\n"));
continue;
}
}
else if (load_flags & NETSNMP_ACCESS_TCPCONN_LOAD_ONLYLISTEN) {
DEBUGMSGT(("verbose:access:tcpconn:container",
" skipping non-listen\n"));
continue;
}
}
/*
*/
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 = (unsigned short) local_port;
entry->rmt_port = (unsigned short) remote_port;
entry->tcpConnState = state;
/** the addr string may need work */
buf_len = strlen(local_addr);
if ((8 != buf_len) ||
(-1 == netsnmp_addrstr_hton(local_addr, 8))) {
DEBUGMSGT(("verbose:access:tcpconn:container",
" error processing local address\n"));
netsnmp_access_tcpconn_entry_free(entry);
continue;
}
offset = 0;
tmp_ptr = entry->loc_addr;
rc = netsnmp_hex_to_binary(&tmp_ptr, &buf_len,
&offset, 0, local_addr, NULL);
entry->loc_addr_len = offset;
if ( 4 != entry->loc_addr_len ) {
DEBUGMSGT(("access:tcpconn:container",
"error parsing local addr (%d != 4)\n",
entry->loc_addr_len));
DEBUGMSGT(("access:tcpconn:container"," line '%s'\n", line));
netsnmp_access_tcpconn_entry_free(entry);
continue;
}
/** the addr string may need work */
buf_len = strlen((char*)remote_addr);
if ((8 != buf_len) ||
(-1 == netsnmp_addrstr_hton(remote_addr, 8))) {
DEBUGMSGT(("verbose:access:tcpconn:container",
" error processing remote address\n"));
netsnmp_access_tcpconn_entry_free(entry);
continue;
}
offset = 0;
tmp_ptr = entry->rmt_addr;
rc = netsnmp_hex_to_binary(&tmp_ptr, &buf_len,
&offset, 0, remote_addr, NULL);
entry->rmt_addr_len = offset;
if ( 4 != entry->rmt_addr_len ) {
DEBUGMSGT(("access:tcpconn:container",
"error parsing remote addr (%d != 4)\n",
entry->rmt_addr_len));
DEBUGMSGT(("access:tcpconn:container"," line '%s'\n", line));
netsnmp_access_tcpconn_entry_free(entry);
continue;
}
/*
* add entry to container
*/
entry->arbitrary_index = CONTAINER_SIZE(container) + 1;
CONTAINER_INSERT(container, entry);
}
fclose(in);
if(rc<0)
return rc;
return 0;
}
#if defined (NETSNMP_ENABLE_IPV6)
/**
*
* @retval 0 no errors
* @retval !0 errors
*/
static int
_load6(netsnmp_container *container, u_int load_flags)
{
int rc = 0;
FILE *in;
char line[180];
static int log_open_err = 1;
netsnmp_assert(NULL != container);
#undef PROCFILE
#define PROCFILE "/proc/net/tcp6"
if (!(in = fopen(PROCFILE, "r"))) {
snmp_log(LOG_ERR,"could not open " PROCFILE "\n");
if (1 == log_open_err) {
snmp_log(LOG_ERR,"could not open " PROCFILE "\n");
log_open_err = 0;
}
return -2;
}
/*
* if we turned off logging of open errors, turn it back on now that
* we have been able to open the file.
*/
if (0 == log_open_err)
log_open_err = 1;
fgets(line, sizeof(line), in); /* skip header */
/*
* Note: PPC (big endian)
*
* sl local_address rem_address st tx_queue rx_queue tr tm->when retrnsmt uid timeout inode
* 0: 00000000000000000000000000000001:1466 00000000000000000000000000000000:0000 0A 00000000:00000000 00:00000000 00000000 500 0 326699 1 efb81580 3000 0 0 2 -1
*/
while (fgets(line, sizeof(line), in)) {
netsnmp_tcpconn_entry *entry;
int state, rc, local_port, remote_port, tmp_state;
size_t buf_len, offset;
u_char local_addr[48], remote_addr[48];
u_char *tmp_ptr;
if (5 != (rc = sscanf(line, "%*d: %47[0-9A-Z]:%x %47[0-9A-Z]:%x %x",
local_addr, &local_port,
remote_addr, &remote_port, &tmp_state))) {
DEBUGMSGT(("access:tcpconn:container",
"error parsing line (%d != 5)\n", rc));
DEBUGMSGT(("access:tcpconn:container"," line '%s'\n", line));
continue;
}
DEBUGMSGT(("verbose:access:tcpconn:container"," line '%s'\n", line));
/*
* check if we care about listen state
*/
state = (tmp_state & 0xf) < 12 ? linux_states[tmp_state & 0xf] : 2;
if (load_flags) {
if (TCPCONNECTIONSTATE_LISTEN == state) {
if (load_flags & NETSNMP_ACCESS_TCPCONN_LOAD_NOLISTEN) {
DEBUGMSGT(("verbose:access:tcpconn:container",
" skipping listen\n"));
continue;
}
}
else if (load_flags & NETSNMP_ACCESS_TCPCONN_LOAD_ONLYLISTEN) {
DEBUGMSGT(("verbose:access:tcpconn:container",
" skipping non-listen\n"));
continue;
}
}
/*
*/
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 = (unsigned short) local_port;
entry->rmt_port = (unsigned short) remote_port;
entry->tcpConnState = state;
/** the addr string may need work */
buf_len = strlen((char*)local_addr);
if ((32 != buf_len) ||
(-1 == netsnmp_addrstr_hton(local_addr, 32))) {
DEBUGMSGT(("verbose:access:tcpconn:container",
" error processing local address\n"));
netsnmp_access_tcpconn_entry_free(entry);
continue;
}
offset = 0;
tmp_ptr = entry->loc_addr;
rc = netsnmp_hex_to_binary(&tmp_ptr, &buf_len,
&offset, 0, local_addr, NULL);
entry->loc_addr_len = offset;
if (( 16 != entry->loc_addr_len ) && ( 20 != entry->loc_addr_len )) {
DEBUGMSGT(("access:tcpconn:container",
"error parsing local addr (%d != 16|20)\n",
entry->loc_addr_len));
DEBUGMSGT(("access:tcpconn:container"," line '%s'\n", line));
netsnmp_access_tcpconn_entry_free(entry);
continue;
}
buf_len = strlen((char*)remote_addr);
if ((32 != buf_len) ||
(-1 == netsnmp_addrstr_hton(remote_addr, 32))) {
DEBUGMSGT(("verbose:access:tcpconn:container",
" error processing remote address\n"));
netsnmp_access_tcpconn_entry_free(entry);
continue;
}
offset = 0;
tmp_ptr = entry->rmt_addr;
rc = netsnmp_hex_to_binary(&tmp_ptr, &buf_len,
&offset, 0, remote_addr, NULL);
entry->rmt_addr_len = offset;
if (( 16 != entry->rmt_addr_len ) && ( 20 != entry->rmt_addr_len )) {
DEBUGMSGT(("access:tcpconn:container",
"error parsing remote addr (%d != 16|20)\n",
entry->rmt_addr_len));
DEBUGMSGT(("access:tcpconn:container"," line '%s'\n", line));
netsnmp_access_tcpconn_entry_free(entry);
continue;
}
/*
* add entry to container
*/
entry->arbitrary_index = CONTAINER_SIZE(container) + 1;
CONTAINER_INSERT(container, entry);
}
fclose(in);
if(rc<0)
return rc;
return 0;
}
#endif /* NETSNMP_ENABLE_IPV6 */
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