/*
This way is definitely safer than passing the pcap_stat * from the userland. In fact, there could
happen than the user allocates a variable which is not big enough for the new structure, and the
library will write in a zone which is not allocated to this variable.
In this way, we're pretty sure we are writing on memory allocated to this variable.
*/
struct pcap_stat *
pcap_stats_ex(pcap_t *p, int *pcap_stat_size)
{
*pcap_stat_size= sizeof (struct pcap_stat);
#ifdef HAVE_REMOTE
if (p->rmt_clientside)
{
/* We are on an remote capture */
return pcap_stats_ex_remote(p);
}
#endif
if (p->adapter == NULL)
{
sprintf(p->errbuf, "Cannot retrieve the extended statistics from a file or a TurboCap port");
return NULL;
}
if(PacketGetStatsEx(p->adapter, (struct bpf_stat*) (&p->md.stat) ) != TRUE){
snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "PacketGetStatsEx error: %s", pcap_win32strerror());
return NULL;
}
return (&p->md.stat);
}
/*
* Win32-only routine for getting statistics.
*
* This way is definitely safer than passing the pcap_stat * from the userland.
* In fact, there could happen than the user allocates a variable which is not
* big enough for the new structure, and the library will write in a zone
* which is not allocated to this variable.
*
* In this way, we're pretty sure we are writing on memory allocated to this
* variable.
*
* XXX - but this is the wrong way to handle statistics. Instead, we should
* have an API that returns data in a form like the Options section of a
* pcapng Interface Statistics Block:
*
* http://xml2rfc.tools.ietf.org/cgi-bin/xml2rfc.cgi?url=https://raw.githubusercontent.com/pcapng/pcapng/master/draft-tuexen-opsawg-pcapng.xml&modeAsFormat=html/ascii&type=ascii#rfc.section.4.6
*
* which would let us add new statistics straightforwardly and indicate which
* statistics we are and are *not* providing, rather than having to provide
* possibly-bogus values for statistics we can't provide.
*/
struct pcap_stat *
pcap_stats_ex_win32(pcap_t *p, int *pcap_stat_size)
{
struct pcap_win *pw = p->priv;
struct bpf_stat bstats;
char errbuf[PCAP_ERRBUF_SIZE+1];
*pcap_stat_size = sizeof (p->stat);
/*
* Try to get statistics.
*
* (Please note - "struct pcap_stat" is *not* the same as
* WinPcap's "struct bpf_stat". It might currently have the
* same layout, but let's not cheat.)
*/
if (!PacketGetStatsEx(pw->adapter, &bstats)) {
pcap_win32_err_to_str(GetLastError(), errbuf);
pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
"PacketGetStatsEx error: %s", errbuf);
return (NULL);
}
p->stat.ps_recv = bstats.bs_recv;
p->stat.ps_drop = bstats.bs_drop;
p->stat.ps_ifdrop = bstats.ps_ifdrop;
#ifdef ENABLE_REMOTE
p->stat.ps_capt = bstats.bs_capt;
#endif
return (&p->stat);
}
/*
* Return traffic statisistics since started (stats) and
* total since adapter was opened.
*
* \note 'stats' only count traffic we received and transmitted.
*/
int pkt_get_stats (struct PktStats *stats, struct PktStats *total)
{
const ADAPTER *adapter;
struct bpf_stat b_stat;
struct {
PACKET_OID_DATA oidData;
DWORD value;
} oid;
DWORD count[4];
if (!_pkt_inf)
return (0);
adapter = (const ADAPTER*) _pkt_inf->adapter;
if (!PacketGetStatsEx(adapter,&b_stat))
return (0);
memset (total, 0, sizeof(*total)); /* we don't know yet */
memset (&count, 0, sizeof(count));
/*
* Query: OID_GEN_RCV_OK, OID_GEN_RCV_ERROR
* OID_GEN_XMIT_OK, OID_GEN_XMIT_ERROR
*/
memset (&oid, 0, sizeof(oid));
oid.oidData.Oid = OID_GEN_RCV_OK;
oid.oidData.Length = sizeof(oid.value);
if (!PacketRequest (adapter, FALSE, &oid.oidData))
goto no_total;
count[0] = *(DWORD*) &oid.oidData.Data;
memset (&oid, 0, sizeof(oid));
oid.oidData.Oid = OID_GEN_XMIT_OK;
oid.oidData.Length = sizeof(oid.value);
if (!PacketRequest (adapter, FALSE, &oid.oidData))
goto no_total;
count[1] = *(DWORD*) &oid.oidData.Data;
memset (&oid, 0, sizeof(oid));
oid.oidData.Oid = OID_GEN_RCV_ERROR;
oid.oidData.Length = sizeof(oid.value);
if (!PacketRequest (adapter, FALSE, &oid.oidData))
goto no_total;
count[2] = *(DWORD*) &oid.oidData.Data;
memset (&oid, 0, sizeof(oid));
oid.oidData.Oid = OID_GEN_XMIT_ERROR;
oid.oidData.Length = sizeof(oid.value);
if (!PacketRequest (adapter, FALSE, &oid.oidData))
goto no_total;
count[3] = *(DWORD*) &oid.oidData.Data;
no_total:
total->in_packets = count[0];
total->out_packets = count[1];
total->in_errors = count[2];
total->out_errors = count[3];
stats->in_packets = b_stat.bs_recv;
stats->in_bytes = num_tx_bytes;
stats->out_packets = num_tx_pkt;
stats->out_bytes = num_tx_bytes;
stats->in_errors = 0UL;
stats->out_errors = num_tx_errors;
stats->lost = b_stat.bs_drop + b_stat.ps_ifdrop;
return (1);
}
