stat_record_t process_data(char *wfile, int element_stat, int flow_stat, int sort_flows,
printer_t print_header, printer_t print_record, time_t twin_start, time_t twin_end,
uint64_t limitflows, int tag, int compress, int do_xstat) {
common_record_t *flow_record;
master_record_t *master_record;
nffile_t *nffile_w, *nffile_r;
xstat_t *xstat;
stat_record_t stat_record;
int done, write_file;
#ifdef COMPAT15
int v1_map_done = 0;
#endif
// time window of all matched flows
memset((void *)&stat_record, 0, sizeof(stat_record_t));
stat_record.first_seen = 0x7fffffff;
stat_record.msec_first = 999;
// Do the logic first
// do not print flows when doing any stats are sorting
if ( sort_flows || flow_stat || element_stat ) {
print_record = NULL;
}
// do not write flows to file, when doing any stats
// -w may apply for flow_stats later
write_file = !(sort_flows || flow_stat || element_stat) && wfile;
nffile_r = NULL;
nffile_w = NULL;
xstat = NULL;
// Get the first file handle
nffile_r = GetNextFile(NULL, twin_start, twin_end);
if ( !nffile_r ) {
LogError("GetNextFile() error in %s line %d: %s\n", __FILE__, __LINE__, strerror(errno) );
return stat_record;
}
if ( nffile_r == EMPTY_LIST ) {
LogError("Empty file list. No files to process\n");
return stat_record;
}
// preset time window of all processed flows to the stat record in first flow file
t_first_flow = nffile_r->stat_record->first_seen;
t_last_flow = nffile_r->stat_record->last_seen;
// store infos away for later use
// although multiple files may be processed, it is assumed that all
// have the same settings
is_anonymized = IP_ANONYMIZED(nffile_r);
strncpy(Ident, nffile_r->file_header->ident, IDENTLEN);
Ident[IDENTLEN-1] = '\0';
// prepare output file if requested
if ( write_file ) {
nffile_w = OpenNewFile(wfile, NULL, compress, IP_ANONYMIZED(nffile_r), NULL );
if ( !nffile_w ) {
if ( nffile_r ) {
CloseFile(nffile_r);
DisposeFile(nffile_r);
}
return stat_record;
}
if ( do_xstat ) {
xstat = InitXStat(nffile_w);
if ( !xstat ) {
if ( nffile_r ) {
CloseFile(nffile_r);
DisposeFile(nffile_r);
}
return stat_record;
}
}
}
// setup Filter Engine to point to master_record, as any record read from file
// is expanded into this record
// Engine->nfrecord = (uint64_t *)master_record;
done = 0;
while ( !done ) {
int i, ret;
// get next data block from file
ret = ReadBlock(nffile_r);
switch (ret) {
case NF_CORRUPT:
case NF_ERROR:
if ( ret == NF_CORRUPT )
LogError("Skip corrupt data file '%s'\n",GetCurrentFilename());
else
LogError("Read error in file '%s': %s\n",GetCurrentFilename(), strerror(errno) );
// fall through - get next file in chain
case NF_EOF: {
nffile_t *next = GetNextFile(nffile_r, twin_start, twin_end);
if ( next == EMPTY_LIST ) {
done = 1;
} else if ( next == NULL ) {
done = 1;
LogError("Unexpected end of file list\n");
} else {
// Update global time span window
if ( next->stat_record->first_seen < t_first_flow )
t_first_flow = next->stat_record->first_seen;
if ( next->stat_record->last_seen > t_last_flow )
t_last_flow = next->stat_record->last_seen;
// continue with next file
}
continue;
} break; // not really needed
default:
// successfully read block
total_bytes += ret;
}
#ifdef COMPAT15
if ( nffile_r->block_header->id == DATA_BLOCK_TYPE_1 ) {
common_record_v1_t *v1_record = (common_record_v1_t *)nffile_r->buff_ptr;
// create an extension map for v1 blocks
if ( v1_map_done == 0 ) {
extension_map_t *map = malloc(sizeof(extension_map_t) + 2 * sizeof(uint16_t) );
if ( ! map ) {
LogError("malloc() allocation error in %s line %d: %s\n", __FILE__, __LINE__, strerror(errno) );
exit(255);
}
map->type = ExtensionMapType;
map->size = sizeof(extension_map_t) + 2 * sizeof(uint16_t);
if (( map->size & 0x3 ) != 0 ) {
map->size += 4 - ( map->size & 0x3 );
}
map->map_id = INIT_ID;
map->ex_id[0] = EX_IO_SNMP_2;
map->ex_id[1] = EX_AS_2;
map->ex_id[2] = 0;
map->extension_size = 0;
map->extension_size += extension_descriptor[EX_IO_SNMP_2].size;
map->extension_size += extension_descriptor[EX_AS_2].size;
if ( Insert_Extension_Map(extension_map_list,map) && write_file ) {
// flush new map
AppendToBuffer(nffile_w, (void *)map, map->size);
} // else map already known and flushed
v1_map_done = 1;
}
// convert the records to v2
for ( i=0; i < nffile_r->block_header->NumRecords; i++ ) {
common_record_t *v2_record = (common_record_t *)v1_record;
Convert_v1_to_v2((void *)v1_record);
// now we have a v2 record -> use size of v2_record->size
v1_record = (common_record_v1_t *)((pointer_addr_t)v1_record + v2_record->size);
}
nffile_r->block_header->id = DATA_BLOCK_TYPE_2;
}
#endif
if ( nffile_r->block_header->id == Large_BLOCK_Type ) {
// skip
printf("Xstat block skipped ...\n");
continue;
}
if ( nffile_r->block_header->id != DATA_BLOCK_TYPE_2 ) {
if ( nffile_r->block_header->id == DATA_BLOCK_TYPE_1 ) {
LogError("Can't process nfdump 1.5.x block type 1. Add --enable-compat15 to compile compatibility code. Skip block.\n");
} else {
LogError("Can't process block type %u. Skip block.\n", nffile_r->block_header->id);
}
skipped_blocks++;
continue;
}
flow_record = nffile_r->buff_ptr;
for ( i=0; i < nffile_r->block_header->NumRecords; i++ ) {
switch ( flow_record->type ) {
case CommonRecordV0Type:
case CommonRecordType: {
int match;
uint32_t map_id = flow_record->ext_map;
generic_exporter_t *exp_info = exporter_list[flow_record->exporter_sysid];
if ( map_id >= MAX_EXTENSION_MAPS ) {
LogError("Corrupt data file. Extension map id %u too big.\n", flow_record->ext_map);
exit(255);
}
if ( extension_map_list->slot[map_id] == NULL ) {
LogError("Corrupt data file. Missing extension map %u. Skip record.\n", flow_record->ext_map);
flow_record = (common_record_t *)((pointer_addr_t)flow_record + flow_record->size);
continue;
}
total_flows++;
master_record = &(extension_map_list->slot[map_id]->master_record);
Engine->nfrecord = (uint64_t *)master_record;
ExpandRecord_v2( flow_record, extension_map_list->slot[map_id],
exp_info ? &(exp_info->info) : NULL, master_record);
// Time based filter
// if no time filter is given, the result is always true
match = twin_start && (master_record->first < twin_start || master_record->last > twin_end) ? 0 : 1;
match &= limitflows ? stat_record.numflows < limitflows : 1;
// filter netflow record with user supplied filter
if ( match )
match = (*Engine->FilterEngine)(Engine);
if ( match == 0 ) { // record failed to pass all filters
// increment pointer by number of bytes for netflow record
flow_record = (common_record_t *)((pointer_addr_t)flow_record + flow_record->size);
// go to next record
continue;
}
// Records passed filter -> continue record processing
// Update statistics
UpdateStat(&stat_record, master_record);
// update number of flows matching a given map
extension_map_list->slot[map_id]->ref_count++;
if ( flow_stat ) {
AddFlow(flow_record, master_record, extension_map_list->slot[map_id]);
if ( element_stat ) {
AddStat(flow_record, master_record);
}
} else if ( element_stat ) {
AddStat(flow_record, master_record);
} else if ( sort_flows ) {
InsertFlow(flow_record, master_record, extension_map_list->slot[map_id]);
} else {
if ( write_file ) {
AppendToBuffer(nffile_w, (void *)flow_record, flow_record->size);
if ( xstat )
UpdateXStat(xstat, master_record);
} else if ( print_record ) {
char *string;
// if we need to print out this record
print_record(master_record, &string, tag);
if ( string ) {
if ( limitflows ) {
if ( (stat_record.numflows <= limitflows) )
printf("%s\n", string);
} else
printf("%s\n", string);
}
} else {
// mutually exclusive conditions should prevent executing this code
// this is buggy!
printf("Bug! - this code should never get executed in file %s line %d\n", __FILE__, __LINE__);
}
} // sort_flows - else
} break;
case ExtensionMapType: {
extension_map_t *map = (extension_map_t *)flow_record;
if ( Insert_Extension_Map(extension_map_list, map) && write_file ) {
// flush new map
AppendToBuffer(nffile_w, (void *)map, map->size);
} // else map already known and flushed
} break;
case ExporterRecordType:
case SamplerRecordype:
// Silently skip exporter records
break;
case ExporterInfoRecordType: {
int ret = AddExporterInfo((exporter_info_record_t *)flow_record);
if ( ret != 0 ) {
if ( write_file && ret == 1 )
AppendToBuffer(nffile_w, (void *)flow_record, flow_record->size);
} else {
LogError("Failed to add Exporter Record\n");
}
} break;
case ExporterStatRecordType:
AddExporterStat((exporter_stats_record_t *)flow_record);
break;
case SamplerInfoRecordype: {
int ret = AddSamplerInfo((sampler_info_record_t *)flow_record);
if ( ret != 0 ) {
if ( write_file && ret == 1 )
AppendToBuffer(nffile_w, (void *)flow_record, flow_record->size);
} else {
LogError("Failed to add Sampler Record\n");
}
} break;
default: {
LogError("Skip unknown record type %i\n", flow_record->type);
}
}
// Advance pointer by number of bytes for netflow record
flow_record = (common_record_t *)((pointer_addr_t)flow_record + flow_record->size);
} // for all records
// check if we are done, due to -c option
if ( limitflows )
done = stat_record.numflows >= limitflows;
} // while
CloseFile(nffile_r);
// flush output file
if ( write_file ) {
// flush current buffer to disc
if ( nffile_w->block_header->NumRecords ) {
if ( WriteBlock(nffile_w) <= 0 ) {
LogError("Failed to write output buffer to disk: '%s'" , strerror(errno));
}
}
if ( xstat ) {
if ( WriteExtraBlock(nffile_w, xstat->block_header ) <= 0 ) {
LogError("Failed to write xstat buffer to disk: '%s'" , strerror(errno));
}
}
/* Stat info */
if ( write_file ) {
/* Copy stat info and close file */
memcpy((void *)nffile_w->stat_record, (void *)&stat_record, sizeof(stat_record_t));
CloseUpdateFile(nffile_w, nffile_r->file_header->ident );
nffile_w = DisposeFile(nffile_w);
} // else stdout
}
PackExtensionMapList(extension_map_list);
DisposeFile(nffile_r);
return stat_record;
} // End of process_data
static void send_data(char *rfile, time_t twin_start,
time_t twin_end, uint32_t count, unsigned int delay, int confirm, int netflow_version) {
master_record_t master_record;
common_record_t *flow_record;
nffile_t *nffile;
int i, done, ret, again;
uint32_t numflows, cnt;
#ifdef COMPAT15
int v1_map_done = 0;
#endif
// Get the first file handle
nffile = GetNextFile(NULL, twin_start, twin_end);
if ( !nffile ) {
LogError("GetNextFile() error in %s line %d: %s\n", __FILE__, __LINE__, strerror(errno) );
return;
}
if ( nffile == EMPTY_LIST ) {
LogError("Empty file list. No files to process\n");
return;
}
peer.send_buffer = malloc(UDP_PACKET_SIZE);
peer.flush = 0;
if ( !peer.send_buffer ) {
LogError("malloc() error in %s line %d: %s\n", __FILE__, __LINE__, strerror(errno) );
CloseFile(nffile);
DisposeFile(nffile);
return;
}
peer.buff_ptr = peer.send_buffer;
peer.endp = (void *)((pointer_addr_t)peer.send_buffer + UDP_PACKET_SIZE - 1);
if ( netflow_version == 5 )
Init_v5_v7_output(&peer);
else
Init_v9_output(&peer);
numflows = 0;
done = 0;
// setup Filter Engine to point to master_record, as any record read from file
// is expanded into this record
Engine->nfrecord = (uint64_t *)&master_record;
cnt = 0;
while ( !done ) {
// get next data block from file
ret = ReadBlock(nffile);
switch (ret) {
case NF_CORRUPT:
case NF_ERROR:
if ( ret == NF_CORRUPT )
LogError("Skip corrupt data file '%s'\n",GetCurrentFilename());
else
LogError("Read error in file '%s': %s\n",GetCurrentFilename(), strerror(errno) );
// fall through - get next file in chain
case NF_EOF: {
nffile_t *next = GetNextFile(nffile, twin_start, twin_end);
if ( next == EMPTY_LIST ) {
done = 1;
}
if ( next == NULL ) {
done = 1;
LogError("Unexpected end of file list\n");
}
// else continue with next file
continue;
} break; // not really needed
}
#ifdef COMPAT15
if ( nffile->block_header->id == DATA_BLOCK_TYPE_1 ) {
common_record_v1_t *v1_record = (common_record_v1_t *)nffile->buff_ptr;
// create an extension map for v1 blocks
if ( v1_map_done == 0 ) {
extension_map_t *map = malloc(sizeof(extension_map_t) + 2 * sizeof(uint16_t) );
if ( ! map ) {
perror("Memory allocation error");
exit(255);
}
map->type = ExtensionMapType;
map->size = sizeof(extension_map_t) + 2 * sizeof(uint16_t);
if (( map->size & 0x3 ) != 0 ) {
map->size += 4 - ( map->size & 0x3 );
}
map->map_id = INIT_ID;
map->ex_id[0] = EX_IO_SNMP_2;
map->ex_id[1] = EX_AS_2;
map->ex_id[2] = 0;
map->extension_size = 0;
map->extension_size += extension_descriptor[EX_IO_SNMP_2].size;
map->extension_size += extension_descriptor[EX_AS_2].size;
Insert_Extension_Map(extension_map_list, map);
v1_map_done = 1;
}
// convert the records to v2
for ( i=0; i < nffile->block_header->NumRecords; i++ ) {
common_record_t *v2_record = (common_record_t *)v1_record;
Convert_v1_to_v2((void *)v1_record);
// now we have a v2 record -> use size of v2_record->size
v1_record = (common_record_v1_t *)((pointer_addr_t)v1_record + v2_record->size);
}
nffile->block_header->id = DATA_BLOCK_TYPE_2;
}
#endif
if ( nffile->block_header->id != DATA_BLOCK_TYPE_2 ) {
LogError("Can't process block type %u. Skip block.\n", nffile->block_header->id);
continue;
}
// cnt is the number of blocks, which survived the filter
// and added to the output buffer
flow_record = nffile->buff_ptr;
for ( i=0; i < nffile->block_header->NumRecords; i++ ) {
int match;
switch ( flow_record->type ) {
case CommonRecordType: {
if ( extension_map_list->slot[flow_record->ext_map] == NULL ) {
LogError("Corrupt data file. Missing extension map %u. Skip record.\n", flow_record->ext_map);
flow_record = (common_record_t *)((pointer_addr_t)flow_record + flow_record->size);
continue;
}
// if no filter is given, the result is always true
ExpandRecord_v2( flow_record, extension_map_list->slot[flow_record->ext_map], NULL, &master_record);
match = twin_start && (master_record.first < twin_start || master_record.last > twin_end) ? 0 : 1;
// filter netflow record with user supplied filter
if ( match )
match = (*Engine->FilterEngine)(Engine);
if ( match == 0 ) { // record failed to pass all filters
// increment pointer by number of bytes for netflow record
flow_record = (common_record_t *)((pointer_addr_t)flow_record + flow_record->size);
// go to next record
continue;
}
// Records passed filter -> continue record processing
if ( netflow_version == 5 )
again = Add_v5_output_record(&master_record, &peer);
else
again = Add_v9_output_record(&master_record, &peer);
cnt++;
numflows++;
if ( peer.flush ) {
ret = FlushBuffer(confirm);
if ( ret < 0 ) {
perror("Error sending data");
CloseFile(nffile);
DisposeFile(nffile);
return;
}
if ( delay ) {
// sleep as specified
usleep(delay);
}
cnt = 0;
}
if ( again ) {
if ( netflow_version == 5 )
Add_v5_output_record(&master_record, &peer);
else
Add_v9_output_record(&master_record, &peer);
cnt++;
}
} break;
case ExtensionMapType: {
extension_map_t *map = (extension_map_t *)flow_record;
if ( Insert_Extension_Map(extension_map_list, map) ) {
// flush new map
} // else map already known and flushed
} break;
case ExporterRecordType:
case SamplerRecordype:
case ExporterInfoRecordType:
case ExporterStatRecordType:
case SamplerInfoRecordype:
// Silently skip exporter/sampler records
break;
default: {
LogError("Skip unknown record type %i\n", flow_record->type);
}
}
// Advance pointer by number of bytes for netflow record
flow_record = (common_record_t *)((pointer_addr_t)flow_record + flow_record->size);
}
} // while
// flush still remaining records
if ( cnt ) {
ret = FlushBuffer(confirm);
if ( ret < 0 ) {
perror("Error sending data");
}
} // if cnt
if (nffile) {
CloseFile(nffile);
DisposeFile(nffile);
}
close(peer.sockfd);
return;
} // End of send_data
static void process_data(void) {
master_record_t master_record;
common_record_t *flow_record;
nffile_t *nffile;
int i, done, ret;
#ifdef COMPAT15
int v1_map_done = 0;
#endif
// Get the first file handle
nffile = GetNextFile(NULL, 0, 0);
if ( !nffile ) {
LogError("GetNextFile() error in %s line %d: %s\n", __FILE__, __LINE__, strerror(errno) );
return;
}
if ( nffile == EMPTY_LIST ) {
LogError("Empty file list. No files to process\n");
return;
}
done = 0;
while ( !done ) {
// get next data block from file
ret = ReadBlock(nffile);
switch (ret) {
case NF_CORRUPT:
case NF_ERROR:
if ( ret == NF_CORRUPT )
fprintf(stderr, "Skip corrupt data file '%s'\n",GetCurrentFilename());
else
fprintf(stderr, "Read error in file '%s': %s\n",GetCurrentFilename(), strerror(errno) );
// fall through - get next file in chain
case NF_EOF: {
nffile_t *next = GetNextFile(nffile, 0, 0);
if ( next == EMPTY_LIST ) {
done = 1;
}
if ( next == NULL ) {
done = 1;
LogError("Unexpected end of file list\n");
}
// else continue with next file
continue;
} break; // not really needed
}
#ifdef COMPAT15
if ( nffile->block_header->id == DATA_BLOCK_TYPE_1 ) {
common_record_v1_t *v1_record = (common_record_v1_t *)nffile->buff_ptr;
// create an extension map for v1 blocks
if ( v1_map_done == 0 ) {
extension_map_t *map = malloc(sizeof(extension_map_t) + 2 * sizeof(uint16_t) );
if ( ! map ) {
LogError("malloc() allocation error in %s line %d: %s\n", __FILE__, __LINE__, strerror(errno) );
exit(255);
}
map->type = ExtensionMapType;
map->size = sizeof(extension_map_t) + 2 * sizeof(uint16_t);
if (( map->size & 0x3 ) != 0 ) {
map->size += 4 - ( map->size & 0x3 );
}
map->map_id = INIT_ID;
map->ex_id[0] = EX_IO_SNMP_2;
map->ex_id[1] = EX_AS_2;
map->ex_id[2] = 0;
map->extension_size = 0;
Insert_Extension_Map(&extension_map_list, map);
v1_map_done = 1;
}
// convert the records to v2
for ( i=0; i < nffile->block_header->NumRecords; i++ ) {
common_record_t *v2_record = (common_record_t *)v1_record;
Convert_v1_to_v2((void *)v1_record);
// now we have a v2 record -> use size of v2_record->size
v1_record = (common_record_v1_t *)((pointer_addr_t)v1_record + v2_record->size);
}
nffile->block_header->id = DATA_BLOCK_TYPE_2;
}
#endif
if ( nffile->block_header->id == Large_BLOCK_Type ) {
// skip
continue;
}
if ( nffile->block_header->id != DATA_BLOCK_TYPE_2 ) {
fprintf(stderr, "Can't process block type %u. Skip block.\n", nffile->block_header->id);
continue;
}
flow_record = nffile->buff_ptr;
for ( i=0; i < nffile->block_header->NumRecords; i++ ) {
char string[1024];
switch ( flow_record->type ) {
case CommonRecordType: {
uint32_t map_id = flow_record->ext_map;
generic_exporter_t *exp_info = exporter_list[flow_record->exporter_sysid];
if ( extension_map_list.slot[map_id] == NULL ) {
snprintf(string, 1024, "Corrupt data file! No such extension map id: %u. Skip record", flow_record->ext_map );
string[1023] = '\0';
} else {
ExpandRecord_v2( flow_record, extension_map_list.slot[flow_record->ext_map],
exp_info ? &(exp_info->info) : NULL, &master_record);
// update number of flows matching a given map
extension_map_list.slot[map_id]->ref_count++;
/*
* insert hier your calls to your processing routine
* master_record now contains the next flow record as specified in nffile.c
* for example you can print each record:
*
*/
print_record(&master_record, string);
}
printf("%s\n", string);
} break;
case ExtensionMapType: {
extension_map_t *map = (extension_map_t *)flow_record;
if ( Insert_Extension_Map(&extension_map_list, map) ) {
// flush new map
} // else map already known and flushed
} break;
case ExporterRecordType:
case SamplerRecordype:
// Silently skip exporter records
break;
default: {
fprintf(stderr, "Skip unknown record type %i\n", flow_record->type);
}
}
// Advance pointer by number of bytes for netflow record
flow_record = (common_record_t *)((pointer_addr_t)flow_record + flow_record->size);
} // for all records
} // while
CloseFile(nffile);
DisposeFile(nffile);
PackExtensionMapList(&extension_map_list);
} // End of process_data
static void send_data(char *rfile, time_t twin_start,
time_t twin_end, uint32_t count, unsigned int delay, int confirm, int anon, int netflow_version) {
data_block_header_t in_block_header;
master_record_t master_record;
common_record_t *flow_record, *in_buff;
stat_record_t *stat_record;
int i, rfd, done, ret, again;
uint32_t numflows, cnt;
char *string;
#ifdef COMPAT15
int v1_map_done = 0;
#endif
rfd = GetNextFile(0, twin_start, twin_end, &stat_record);
if ( rfd < 0 ) {
if ( rfd == FILE_ERROR )
fprintf(stderr, "Can't open file for reading: %s\n", strerror(errno));
return;
}
// prepare read and send buffer
in_buff = (common_record_t *) malloc(BUFFSIZE);
peer.send_buffer = malloc(UDP_PACKET_SIZE);
peer.flush = 0;
if ( !in_buff || !peer.send_buffer ) {
perror("Memory allocation error");
close(rfd);
return;
}
peer.writeto = peer.send_buffer;
peer.endp = (void *)((pointer_addr_t)peer.send_buffer + UDP_PACKET_SIZE - 1);
if ( netflow_version == 5 )
Init_v5_v7_output(&peer);
else
Init_v9_output(&peer);
numflows = 0;
done = 0;
// setup Filter Engine to point to master_record, as any record read from file
// is expanded into this record
Engine->nfrecord = (uint64_t *)&master_record;
cnt = 0;
while ( !done ) {
// get next data block from file
ret = ReadBlock(rfd, &in_block_header, (void *)in_buff, &string);
switch (ret) {
case NF_CORRUPT:
case NF_ERROR:
if ( ret == NF_CORRUPT )
fprintf(stderr, "Skip corrupt data file '%s': '%s'\n",GetCurrentFilename(), string);
else
fprintf(stderr, "Read error in file '%s': %s\n",GetCurrentFilename(), strerror(errno) );
// fall through - get next file in chain
case NF_EOF:
rfd = GetNextFile(rfd, twin_start, twin_end, NULL);
if ( rfd < 0 ) {
if ( rfd == NF_ERROR )
fprintf(stderr, "Read error in file '%s': %s\n",GetCurrentFilename(), strerror(errno) );
// rfd == EMPTY_LIST
done = 1;
} // else continue with next file
continue;
break; // not really needed
}
#ifdef COMPAT15
if ( in_block_header.id == DATA_BLOCK_TYPE_1 ) {
common_record_v1_t *v1_record = (common_record_v1_t *)in_buff;
// create an extension map for v1 blocks
if ( v1_map_done == 0 ) {
extension_map_t *map = malloc(sizeof(extension_map_t) + 2 * sizeof(uint16_t) );
if ( ! map ) {
perror("Memory allocation error");
exit(255);
}
map->type = ExtensionMapType;
map->size = sizeof(extension_map_t) + 2 * sizeof(uint16_t);
map->map_id = INIT_ID;
map->ex_id[0] = EX_IO_SNMP_2;
map->ex_id[1] = EX_AS_2;
map->ex_id[2] = 0;
Insert_Extension_Map(&extension_map_list, map);
v1_map_done = 1;
}
// convert the records to v2
for ( i=0; i < in_block_header.NumRecords; i++ ) {
common_record_t *v2_record = (common_record_t *)v1_record;
Convert_v1_to_v2((void *)v1_record);
// now we have a v2 record -> use size of v2_record->size
v1_record = (common_record_v1_t *)((pointer_addr_t)v1_record + v2_record->size);
}
in_block_header.id = DATA_BLOCK_TYPE_2;
}
#endif
if ( in_block_header.id != DATA_BLOCK_TYPE_2 ) {
fprintf(stderr, "Can't process block type %u. Skip block.\n", in_block_header.id);
continue;
}
// cnt is the number of blocks, which survived the filter
// and added to the output buffer
flow_record = in_buff;
for ( i=0; i < in_block_header.NumRecords; i++ ) {
int match;
if ( flow_record->type == CommonRecordType ) {
if ( extension_map_list.slot[flow_record->ext_map] == NULL ) {
fprintf(stderr, "Corrupt data file. Missing extension map %u. Skip record.\n", flow_record->ext_map);
flow_record = (common_record_t *)((pointer_addr_t)flow_record + flow_record->size);
continue;
}
// if no filter is given, the result is always true
ExpandRecord_v2( flow_record, extension_map_list.slot[flow_record->ext_map], &master_record);
match = twin_start && (master_record.first < twin_start || master_record.last > twin_end) ? 0 : 1;
// filter netflow record with user supplied filter
if ( match )
match = (*Engine->FilterEngine)(Engine);
if ( match == 0 ) { // record failed to pass all filters
// increment pointer by number of bytes for netflow record
flow_record = (common_record_t *)((pointer_addr_t)flow_record + flow_record->size);
// go to next record
continue;
}
// Records passed filter -> continue record processing
if ( anon ) {
if ( (flow_record->flags & FLAG_IPV6_ADDR ) == 0 ) {
master_record.v4.srcaddr = anonymize(master_record.v4.srcaddr);
master_record.v4.dstaddr = anonymize(master_record.v4.dstaddr);
} else {
uint64_t anon_ip[2];
anonymize_v6(master_record.v6.srcaddr, anon_ip);
master_record.v6.srcaddr[0] = anon_ip[0];
master_record.v6.srcaddr[1] = anon_ip[1];
anonymize_v6(master_record.v6.dstaddr, anon_ip);
master_record.v6.dstaddr[0] = anon_ip[0];
master_record.v6.dstaddr[1] = anon_ip[1];
}
}
if ( netflow_version == 5 )
again = Add_v5_output_record(&master_record, &peer);
else
again = Add_v9_output_record(&master_record, &peer);
cnt++;
numflows++;
if ( peer.flush ) {
ret = FlushBuffer(confirm);
if ( ret < 0 ) {
perror("Error sending data");
close(rfd);
return;
}
if ( delay ) {
// sleep as specified
usleep(delay);
}
cnt = 0;
}
if ( again ) {
if ( netflow_version == 5 )
Add_v5_output_record(&master_record, &peer);
else
Add_v9_output_record(&master_record, &peer);
cnt++;
}
} else if ( flow_record->type == ExtensionMapType ) {
extension_map_t *map = (extension_map_t *)flow_record;
if ( Insert_Extension_Map(&extension_map_list, map) ) {
// flush new map
} // else map already known and flushed
} else {
fprintf(stderr, "Skip unknown record type %i\n", flow_record->type);
}
// Advance pointer by number of bytes for netflow record
flow_record = (common_record_t *)((pointer_addr_t)flow_record + flow_record->size);
}
} // while
// flush still remaining records
if ( cnt ) {
ret = FlushBuffer(confirm);
if ( ret < 0 ) {
perror("Error sending data");
}
} // if cnt
if ( rfd )
close(rfd);
close(peer.sockfd);
return;
} // End of send_data
static void process_data(profile_channel_info_t *channels, unsigned int num_channels, time_t tslot, int do_xstat) {
common_record_t *flow_record;
nffile_t *nffile;
FilterEngine_data_t *engine;
int i, j, done, ret ;
#ifdef COMPAT15
int v1_map_done = 0;
#endif
nffile = GetNextFile(NULL, 0, 0);
if ( !nffile ) {
LogError("GetNextFile() error in %s line %d: %s\n", __FILE__, __LINE__, strerror(errno) );
return;
}
if ( nffile == EMPTY_LIST ) {
LogError("Empty file list. No files to process\n");
return;
}
// store infos away for later use
// although multiple files may be processed, it is assumed that all
// have the same settings
is_anonymized = IP_ANONYMIZED(nffile);
strncpy(Ident, nffile->file_header->ident, IDENTLEN);
Ident[IDENTLEN-1] = '\0';
done = 0;
while ( !done ) {
// get next data block from file
ret = ReadBlock(nffile);
switch (ret) {
case NF_CORRUPT:
case NF_ERROR:
if ( ret == NF_CORRUPT )
LogError("Skip corrupt data file '%s'\n",GetCurrentFilename());
else
LogError("Read error in file '%s': %s\n",GetCurrentFilename(), strerror(errno) );
// fall through - get next file in chain
case NF_EOF: {
nffile_t *next = GetNextFile(nffile, 0, 0);
if ( next == EMPTY_LIST ) {
done = 1;
}
if ( next == NULL ) {
done = 1;
LogError("Unexpected end of file list\n");
}
continue;
} break; // not really needed
}
#ifdef COMPAT15
if ( nffile->block_header->id == DATA_BLOCK_TYPE_1 ) {
common_record_v1_t *v1_record = (common_record_v1_t *)nffile->buff_ptr;
// create an extension map for v1 blocks
if ( v1_map_done == 0 ) {
extension_map_t *map = malloc(sizeof(extension_map_t) + 2 * sizeof(uint16_t) );
if ( ! map ) {
LogError("malloc() allocation error in %s line %d: %s\n", __FILE__, __LINE__, strerror(errno) );
exit(255);
}
map->type = ExtensionMapType;
map->size = sizeof(extension_map_t) + 2 * sizeof(uint16_t);
if (( map->size & 0x3 ) != 0 ) {
map->size += 4 - ( map->size & 0x3 );
}
map->map_id = INIT_ID;
map->ex_id[0] = EX_IO_SNMP_2;
map->ex_id[1] = EX_AS_2;
map->ex_id[2] = 0;
map->extension_size = 0;
map->extension_size += extension_descriptor[EX_IO_SNMP_2].size;
map->extension_size += extension_descriptor[EX_AS_2].size;
if ( Insert_Extension_Map(extension_map_list, map) ) {
int j;
for ( j=0; j < num_channels; j++ ) {
if ( channels[j].nffile != NULL) {
// flush new map
AppendToBuffer(channels[j].nffile, (void *)map, map->size);
}
}
} // else map already known and flushed
v1_map_done = 1;
}
// convert the records to v2
for ( i=0; i < nffile->block_header->NumRecords; i++ ) {
common_record_t *v2_record = (common_record_t *)v1_record;
Convert_v1_to_v2((void *)v1_record);
// now we have a v2 record -> use size of v2_record->size
v1_record = (common_record_v1_t *)((pointer_addr_t)v1_record + v2_record->size);
}
nffile->block_header->id = DATA_BLOCK_TYPE_2;
}
#endif
if ( nffile->block_header->id == Large_BLOCK_Type ) {
// skip
continue;
}
if ( nffile->block_header->id != DATA_BLOCK_TYPE_2 ) {
LogError("Can't process block type %u. Skip block.\n", nffile->block_header->id);
continue;
}
flow_record = nffile->buff_ptr;
for ( i=0; i < nffile->block_header->NumRecords; i++ ) {
switch ( flow_record->type ) {
case CommonRecordType: {
generic_exporter_t *exp_info = exporter_list[flow_record->exporter_sysid];
uint32_t map_id = flow_record->ext_map;
master_record_t *master_record;
if ( extension_map_list->slot[map_id] == NULL ) {
LogError("Corrupt data file. Missing extension map %u. Skip record.\n", flow_record->ext_map);
flow_record = (common_record_t *)((pointer_addr_t)flow_record + flow_record->size);
continue;
}
master_record = &(extension_map_list->slot[map_id]->master_record);
ExpandRecord_v2( flow_record, extension_map_list->slot[flow_record->ext_map],
exp_info ? &(exp_info->info) : NULL, master_record);
for ( j=0; j < num_channels; j++ ) {
int match;
// apply profile filter
(channels[j].engine)->nfrecord = (uint64_t *)master_record;
engine = channels[j].engine;
match = (*engine->FilterEngine)(engine);
// if profile filter failed -> next profile
if ( !match )
continue;
// filter was successful -> continue record processing
// update statistics
UpdateStat(&channels[j].stat_record, master_record);
if ( channels[j].nffile )
UpdateStat(channels[j].nffile->stat_record, master_record);
if ( channels[j].xstat )
UpdateXStat(channels[j].xstat, master_record);
// do we need to write data to new file - shadow profiles do not have files.
// check if we need to flush the output buffer
if ( channels[j].nffile != NULL ) {
// write record to output buffer
AppendToBuffer(channels[j].nffile, (void *)flow_record, flow_record->size);
}
} // End of for all channels
} break;
case ExtensionMapType: {
extension_map_t *map = (extension_map_t *)flow_record;
if ( Insert_Extension_Map(extension_map_list, map) ) {
int j;
for ( j=0; j < num_channels; j++ ) {
if ( channels[j].nffile != NULL ) {
// flush new map
AppendToBuffer(channels[j].nffile, (void *)map, map->size);
}
}
} // else map already known and flushed
} break;
case ExporterInfoRecordType: {
int ret = AddExporterInfo((exporter_info_record_t *)flow_record);
if ( ret != 0 ) {
int j;
for ( j=0; j < num_channels; j++ ) {
if ( channels[j].nffile != NULL && ret == 1) {
// flush new exporter
AppendToBuffer(channels[j].nffile, (void *)flow_record, flow_record->size);
}
}
} else {
LogError("Failed to add Exporter Record\n");
}
} break;
case SamplerInfoRecordype: {
int ret = AddSamplerInfo((sampler_info_record_t *)flow_record);
if ( ret != 0 ) {
int j;
for ( j=0; j < num_channels; j++ ) {
if ( channels[j].nffile != NULL && ret == 1 ) {
// flush new map
AppendToBuffer(channels[j].nffile, (void *)flow_record, flow_record->size);
}
}
} else {
LogError("Failed to add Sampler Record\n");
}
} break;
case ExporterRecordType:
case SamplerRecordype:
case ExporterStatRecordType:
// Silently skip exporter records
break;
default: {
LogError("Skip unknown record type %i\n", flow_record->type);
}
}
// Advance pointer by number of bytes for netflow record
flow_record = (common_record_t *)((pointer_addr_t)flow_record + flow_record->size);
} // End of for all umRecords
} // End of while !done
// do we need to write data to new file - shadow profiles do not have files.
for ( j=0; j < num_channels; j++ ) {
if ( channels[j].nffile != NULL ) {
// flush output buffer
if ( channels[j].nffile->block_header->NumRecords ) {
if ( WriteBlock(channels[j].nffile) <= 0 ) {
LogError("Failed to write output buffer to disk: '%s'" , strerror(errno));
}
}
}
}
CloseFile(nffile);
DisposeFile(nffile);
} // End of process_data