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sflowtool.c
6086 lines (5447 loc) · 199 KB
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sflowtool.c
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/* Copyright (c) 2002-2019 InMon Corp. Licensed under the terms of the InMon sFlow licence: */
/* http://www.inmon.com/technology/sflowlicense.txt */
#if defined(__cplusplus)
extern "C" {
#endif
#ifdef _WIN32
#include "config_windows.h"
#else
#include "config.h"
#endif
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <fcntl.h>
#include <time.h>
#include <setjmp.h>
#include <ctype.h>
#include <search.h>
#ifdef _WIN32
#else
#include <stdint.h>
#include <unistd.h>
#include <netdb.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <sys/poll.h>
#include <netinet/in_systm.h>
#include <netinet/in.h>
#include <inttypes.h>
#include <arpa/inet.h>
#include <netdb.h>
#endif
#include "sflow.h" /* sFlow v5 */
#include "sflow_v2v4.h" /* sFlow v2/4 */
/* If the platform is Linux, enable the source-spoofing feature too. */
#ifdef linux
#define SPOOFSOURCE 1
#endif
/*
#ifdef DARWIN
#include <architecture/byte_order.h>
#define bswap_16(x) NXSwapShort(x)
#define bswap_32(x) NXSwapInt(x)
#else
#include <byteswap.h>
#endif
*/
/* just do it in a portable way... */
static uint32_t MyByteSwap32(uint32_t n) {
return (((n & 0x000000FF)<<24) +
((n & 0x0000FF00)<<8) +
((n & 0x00FF0000)>>8) +
((n & 0xFF000000)>>24));
}
static uint16_t MyByteSwap16(uint16_t n) {
return ((n >> 8) | (n << 8));
}
#ifndef PRIu64
# ifdef _WIN32
# define PRIu64 "I64u"
# else
# define PRIu64 "llu"
# endif
#endif
#define YES 1
#define NO 0
/* define my own IP header struct - to ease portability */
struct myiphdr
{
uint8_t version_and_headerLen;
uint8_t tos;
uint16_t tot_len;
uint16_t id;
uint16_t frag_off;
uint8_t ttl;
uint8_t protocol;
uint16_t check;
uint32_t saddr;
uint32_t daddr;
};
/* ip6 header if no option headers */
struct myip6hdr {
uint8_t version_and_priority;
uint8_t priority_and_label1;
uint8_t label2;
uint8_t label3;
uint16_t payloadLength;
uint8_t nextHeader;
uint8_t ttl;
struct in6_addr saddr;
struct in6_addr daddr;
};
/* same for tcp */
struct mytcphdr
{
uint16_t th_sport; /* source port */
uint16_t th_dport; /* destination port */
uint32_t th_seq; /* sequence number */
uint32_t th_ack; /* acknowledgement number */
uint8_t th_off_and_unused;
uint8_t th_flags;
uint16_t th_win; /* window */
uint16_t th_sum; /* checksum */
uint16_t th_urp; /* urgent pointer */
};
/* and UDP */
struct myudphdr {
uint16_t uh_sport; /* source port */
uint16_t uh_dport; /* destination port */
uint16_t uh_ulen; /* udp length */
uint16_t uh_sum; /* udp checksum */
};
/* and ICMP */
struct myicmphdr
{
uint8_t type; /* message type */
uint8_t code; /* type sub-code */
/* ignore the rest */
};
#ifdef SPOOFSOURCE
#define SPOOFSOURCE_SENDPACKET_SIZE 2000
struct mySendPacket {
struct myiphdr ip;
struct myudphdr udp;
uint8_t data[SPOOFSOURCE_SENDPACKET_SIZE];
};
#endif
/* tcpdump file format */
struct pcap_file_header {
uint32_t magic;
uint16_t version_major;
uint16_t version_minor;
uint32_t thiszone; /* gmt to local correction */
uint32_t sigfigs; /* accuracy of timestamps */
uint32_t snaplen; /* max length saved portion of each pkt */
uint32_t linktype; /* data link type (DLT_*) */
};
struct pcap_pkthdr {
uint32_t ts_sec; /* time stamp - used to be struct timeval, but time_t can be 64 bits now */
uint32_t ts_usec;
uint32_t caplen; /* length of portion present */
uint32_t len; /* length this packet (off wire) */
/* some systems expect to see more information here. For example,
* on some versions of RedHat Linux, there are three extra fields:
* int index;
* unsigned short protocol;
* unsigned char pkt_type;
*/
};
typedef struct _SFForwardingTarget {
struct _SFForwardingTarget *nxt;
struct sockaddr_in addr;
int sock;
} SFForwardingTarget;
typedef struct _SFForwardingTarget6 {
struct _SFForwardingTarget6 *nxt;
struct sockaddr_in6 addr;
int sock;
} SFForwardingTarget6;
typedef union _SFSockAddr {
struct sockaddr_in sa4;
struct sockaddr_in6 sa6;
} SFSockAddr;
typedef enum { SFLFMT_FULL=0, SFLFMT_PCAP, SFLFMT_LINE, SFLFMT_LINE_CUSTOM, SFLFMT_NETFLOW, SFLFMT_FWD, SFLFMT_CLF, SFLFMT_SCRIPT, SFLFMT_JSON } EnumSFLFormat;
#define SA_MAX_PCAP_PKT 65536
#define SA_MAX_SFLOW_PKT_SIZ 65536
#define SA_MAX_FIELDNAME_LEN 64
#define MAX_STRBUF_LEN 2048
typedef struct {
int cap;
int len;
char str[MAX_STRBUF_LEN];
} SFStr;
typedef enum { SFSCOPE_NONE, SFSCOPE_DATAGRAM, SFSCOPE_SAMPLE } EnumSFScope;
typedef struct _SFFieldList {
int n;
char **fields;
SFStr *values;
/* dynamic info */
char *fieldScope;
int sampleFields;
} SFFieldList;
typedef struct _SFConfig {
/* sflow(R) options */
uint16_t sFlowInputPort;
/* netflow(TM) options */
uint16_t netFlowOutputPort;
SFLAddress netFlowOutputIP;
SFSockAddr netFlowOutputSA;
int netFlowOutputSocket;
uint16_t netFlowPeerAS;
int disableNetFlowScale;
uint16_t netFlowVersion;
/* tcpdump options */
char *readPcapFileName;
FILE *readPcapFile;
struct pcap_file_header readPcapHdr;
char *writePcapFile;
EnumSFLFormat outputFormat;
int jsonIndent;
int jsonStart;
int jsonListStart;
int outputDepth;
SFFieldList outputFieldList;
EnumSFScope currentFieldScope;
int pcapSwap;
#ifdef SPOOFSOURCE
int spoofSource;
uint16_t ipid;
struct mySendPacket sendPkt;
uint32_t packetLen;
#endif
SFForwardingTarget *forwardingTargets;
SFForwardingTarget6 *forwardingTargets6;
/* vlan filtering */
int gotVlanFilter;
#define FILTER_MAX_VLAN 4096
uint8_t vlanFilter[FILTER_MAX_VLAN + 1];
/* content stripping */
int removeContent;
/* options to restrict IP socket / bind */
int listen4;
int listen6;
int listenControlled;
/* general options */
int keepGoing;
int allowDNS;
} SFConfig;
/* make the options structure global to the program */
static SFConfig sfConfig;
/* define a separate global we can use to construct the common-log-file format */
typedef struct _SFCommonLogFormat {
#define SFLFMT_CLF_MAX_LINE 2000
#define SFLFMT_CLF_MAX_CLIENT_LEN 64
int valid;
char client[SFLFMT_CLF_MAX_CLIENT_LEN];
char http_log[SFLFMT_CLF_MAX_LINE];
} SFCommonLogFormat;
static SFCommonLogFormat sfCLF;
static const char *SFHTTP_method_names[] = { "-", "OPTIONS", "GET", "HEAD", "POST", "PUT", "DELETE", "TRACE", "CONNECT" };
typedef struct _SFSample {
/* the raw pdu */
uint8_t *rawSample;
uint32_t rawSampleLen;
uint8_t *endp;
time_t pcapTimestamp;
time_t readTimestamp;
/* decode cursor */
uint32_t *datap;
/* datagram fields */
SFLAddress sourceIP;
SFLAddress agent_addr;
uint32_t agentSubId;
uint32_t datagramVersion;
uint32_t sysUpTime;
uint32_t sequenceNo;
/* per-element fields */
struct {
uint32_t sampleType;
uint32_t elementType;
uint32_t ds_class;
uint32_t ds_index;
/* generic interface counter sample */
SFLIf_counters ifCounters;
/* data-source stream info */
uint32_t samplesGenerated;
uint32_t meanSkipCount;
uint32_t samplePool;
uint32_t dropEvents;
/* the sampled header */
uint32_t sampledPacketSize;
uint32_t packet_data_tag;
uint32_t headerProtocol;
uint8_t *header;
uint32_t headerLen;
uint32_t stripped;
/* header decode */
int gotIPV4;
int gotIPV4Struct;
int offsetToIPV4;
int gotIPV6;
int gotIPV6Struct;
int offsetToIPV6;
int offsetToPayload;
SFLAddress ipsrc;
SFLAddress ipdst;
uint32_t dcd_ipProtocol;
uint32_t dcd_ipTos;
uint32_t dcd_ipTTL;
uint32_t dcd_sport;
uint32_t dcd_dport;
uint32_t dcd_tcpFlags;
uint32_t ip_fragmentOffset;
uint32_t udp_pduLen;
/* ports */
uint32_t inputPortFormat;
uint32_t outputPortFormat;
uint32_t inputPort;
uint32_t outputPort;
/* ethernet */
uint32_t eth_type;
uint32_t eth_len;
uint8_t eth_src[8];
uint8_t eth_dst[8];
/* vlan */
uint32_t in_vlan;
uint32_t in_priority;
uint32_t internalPriority;
uint32_t out_vlan;
uint32_t out_priority;
int vlanFilterReject;
/* extended data fields */
uint32_t num_extended;
uint32_t extended_data_tag;
#define SASAMPLE_EXTENDED_DATA_SWITCH 1
#define SASAMPLE_EXTENDED_DATA_ROUTER 4
#define SASAMPLE_EXTENDED_DATA_GATEWAY 8
#define SASAMPLE_EXTENDED_DATA_USER 16
#define SASAMPLE_EXTENDED_DATA_URL 32
#define SASAMPLE_EXTENDED_DATA_MPLS 64
#define SASAMPLE_EXTENDED_DATA_NAT 128
#define SASAMPLE_EXTENDED_DATA_MPLS_TUNNEL 256
#define SASAMPLE_EXTENDED_DATA_MPLS_VC 512
#define SASAMPLE_EXTENDED_DATA_MPLS_FTN 1024
#define SASAMPLE_EXTENDED_DATA_MPLS_LDP_FEC 2048
#define SASAMPLE_EXTENDED_DATA_VLAN_TUNNEL 4096
#define SASAMPLE_EXTENDED_DATA_NAT_PORT 8192
/* IP forwarding info */
SFLAddress nextHop;
uint32_t srcMask;
uint32_t dstMask;
/* BGP info */
SFLAddress bgp_nextHop;
uint32_t my_as;
uint32_t src_as;
uint32_t src_peer_as;
uint32_t dst_as_path_len;
uint32_t *dst_as_path;
/* note: version 4 dst as path segments just get printed, not stored here, however
* the dst_peer and dst_as are filled in, since those are used for netflow encoding
*/
uint32_t dst_peer_as;
uint32_t dst_as;
uint32_t communities_len;
uint32_t *communities;
uint32_t localpref;
/* mpls */
SFLAddress mpls_nextHop;
/* nat */
SFLAddress nat_src;
SFLAddress nat_dst;
/* counter blocks */
uint32_t statsSamplingInterval;
uint32_t counterBlockVersion;
} s;
/* exception handler context */
jmp_buf env;
#define ERROUT stderr
#ifdef DEBUG
# define SFABORT(s, r) abort()
# undef ERROUT
# define ERROUT stdout
#else
# define SFABORT(s, r) longjmp((s)->env, (r))
#endif
#define SF_ABORT_EOS 1
#define SF_ABORT_DECODE_ERROR 2
#define SF_ABORT_LENGTH_ERROR 3
} SFSample;
/* Cisco netflow version 5 record format */
typedef struct _NFFlow5 {
uint32_t srcIP;
uint32_t dstIP;
uint32_t nextHop;
uint16_t if_in;
uint16_t if_out;
uint32_t frames;
uint32_t bytes;
uint32_t firstTime;
uint32_t lastTime;
uint16_t srcPort;
uint16_t dstPort;
uint8_t pad1;
uint8_t tcpFlags;
uint8_t ipProto;
uint8_t ipTos;
uint16_t srcAS;
uint16_t dstAS;
uint8_t srcMask; /* No. bits */
uint8_t dstMask; /* No. bits */
uint16_t pad2;
} NFFlow5;
typedef struct _NFFlowHdr5 {
uint16_t version;
uint16_t count;
uint32_t sysUpTime;
uint32_t unixSeconds;
uint32_t unixNanoSeconds;
uint32_t flowSequence;
uint8_t engineType;
uint8_t engineId;
uint16_t sampling_interval;
} NFFlowHdr5;
typedef struct _NFFlowPkt5 {
NFFlowHdr5 hdr;
NFFlow5 flow; /* normally an array, but here we always send just 1 at a time */
} NFFlowPkt5;
/* Cisco NetFlow version 9 format */
/* NetFlow v9/ipfix element ids */
#define ID_SRC_IP 8
#define ID_DST_IP 12
#define ID_NEXT_HOP 15
#define ID_IF_IN 10
#define ID_IF_OUT 14
#define ID_PACKETS 2
#define ID_BYTES 1
#define ID_FIRST_SWITCHED 22
#define ID_LAST_SWITCHED 21
#define ID_SRC_PORT 7
#define ID_DST_PORT 11
#define ID_TCP_FLAGS 6
#define ID_PROTOCOL 4
#define ID_TOS 5
#define ID_SRC_AS 16
#define ID_DST_AS 17
#define ID_SRC_MASK 9
#define ID_DST_MASK 13
#define ID_SAMPLING_INTERVAL 34
/* NetFlow v9/ipfix element sizes */
#define SZ_SRC_IP 4
#define SZ_DST_IP 4
#define SZ_NEXT_HOP 4
#define SZ_IF_IN 4
#define SZ_IF_OUT 4
#define SZ_PACKETS 4
#define SZ_BYTES 4
#define SZ_FIRST_SWITCHED 4
#define SZ_LAST_SWITCHED 4
#define SZ_SRC_PORT 2
#define SZ_DST_PORT 2
#define SZ_TCP_FLAGS 1
#define SZ_PROTOCOL 1
#define SZ_TOS 1
#define SZ_SRC_AS 4
#define SZ_DST_AS 4
#define SZ_SRC_MASK 1
#define SZ_DST_MASK 1
#define SZ_SAMPLING_INTERVAL 4
/* NetFlow v9/ipfix element type */
typedef struct _NFField9 {
uint16_t id;
uint16_t sz;
} __attribute__ ((packed)) NFField9;
/* NetFlow v9/ipfix (id, sz) pairs for each element */
static const NFField9 nfField9[] = {
{ ID_SRC_IP, SZ_SRC_IP },
{ ID_DST_IP, SZ_DST_IP },
{ ID_NEXT_HOP, SZ_NEXT_HOP },
{ ID_IF_IN, SZ_IF_IN },
{ ID_IF_OUT, SZ_IF_OUT },
{ ID_PACKETS, SZ_PACKETS },
{ ID_BYTES, SZ_BYTES },
{ ID_FIRST_SWITCHED, SZ_FIRST_SWITCHED },
{ ID_LAST_SWITCHED, SZ_LAST_SWITCHED },
{ ID_SRC_PORT, SZ_SRC_PORT },
{ ID_DST_PORT, SZ_DST_PORT },
{ ID_TCP_FLAGS, SZ_TCP_FLAGS },
{ ID_PROTOCOL, SZ_PROTOCOL },
{ ID_TOS, SZ_TOS },
{ ID_SRC_AS, SZ_SRC_AS },
{ ID_DST_AS, SZ_DST_AS },
{ ID_SRC_MASK, SZ_SRC_MASK },
{ ID_DST_MASK, SZ_DST_MASK },
{ ID_SAMPLING_INTERVAL, SZ_SAMPLING_INTERVAL }
};
/* The NetFlow v9 flow will be shaped similarly to v5,
* but we move sampling interval from the v5 header into
* the flow dataset and expand the interface field widths. */
typedef struct _NFFlow9 {
uint32_t srcIP;
uint32_t dstIP;
uint32_t nextHop;
uint32_t if_in;
uint32_t if_out;
uint32_t packets;
uint32_t bytes;
uint32_t firstTime;
uint32_t lastTime;
uint16_t srcPort;
uint16_t dstPort;
uint8_t tcpFlags;
uint8_t ipProto;
uint8_t ipTos;
uint32_t srcAS;
uint32_t dstAS;
uint8_t srcMask;
uint8_t dstMask;
uint32_t samplingInterval;
} __attribute__ ((packed)) NFFlow9;
/* NetFlow v9 template flowset */
typedef struct _NFTemplateFlowSet9 {
uint16_t setId;
uint16_t length;
uint16_t templateId;
uint16_t fieldCount;
NFField9 field[19];
} __attribute__ ((packed)) NFTemplateFlowSet9;
/* NetFlow v9 data flowset */
typedef struct _NFDataFlowSet9 {
uint16_t templateId;
uint16_t length;
NFFlow9 flow;
} __attribute__ ((packed)) NFDataFlowSet9;
/* NetFlow v9 flow packet header */
typedef struct _NFFlowHeader9 {
uint16_t version;
uint16_t count;
uint32_t sysUpTime;
uint32_t unixSeconds;
uint32_t flowSequence;
uint32_t sourceId;
} __attribute__ ((packed)) NFFlowHeader9;
/* NetFlow v9 flow packet */
typedef struct _NFFlowPkt9 {
NFFlowHeader9 hdr;
NFTemplateFlowSet9 tmpl;
NFDataFlowSet9 data;
} __attribute__ ((packed)) NFFlowPkt9;
/* NetFLow packet can be either v5 or v9 */
typedef struct _NFFlowPkt {
union {
NFFlowPkt5 v5;
NFFlowPkt9 v9;
};
} __attribute__ ((packed)) NFFlowPkt;
/* NetFlow functions to send datagrams */
static void sendNetFlowV5Datagram(SFSample *sample);
static void sendNetFlowV9Datagram(SFSample *sample);
static void (*sendNetFlowDatagram)(SFSample *sample) = sendNetFlowV5Datagram;
static void readFlowSample_header(SFSample *sample);
static void readFlowSample(SFSample *sample, int expanded);
/*_________________---------------------------__________________
_________________ heap allocation __________________
-----------------___________________________------------------
*/
void *my_calloc(size_t bytes) {
void *mem = calloc(1, bytes);
if(mem == NULL) {
fprintf(ERROUT, "calloc(%"PRIu64") failed: %s\n", (uint64_t)bytes, strerror(errno));
exit(-1);
}
return mem;
}
void my_free(void *ptr) {
if(ptr) {
free(ptr);
}
}
/*_________________---------------------------__________________
_________________ string buffer __________________
-----------------___________________________------------------
use string buffer scratchpad to avoid snprintf() idiosyncracies
*/
static void SFStr_init(SFStr *sb) {
sb->cap = MAX_STRBUF_LEN;
sb->len = 0;
sb->str[0] = '\0';
}
static char *SFStr_str(SFStr *sb) {
return sb->str;
}
static int SFStr_len(SFStr *sb) {
return sb->len;
}
static int SFStr_append(SFStr *sb, char *str) {
if(str == NULL)
return YES;
int slen = strlen(str);
int copylen = strlen(str);
if((sb->len + copylen) >= sb->cap)
copylen = sb->cap - sb->len - 1;
if(copylen > 0) {
memcpy(sb->str + sb->len, str, copylen);
sb->len += copylen;
sb->str[sb->len] = '\0';
}
return (copylen == slen);
}
/* hex printing tends to be one of the performance bottlenecks,
so take the trouble to optimize it just a little */
static u_int8_t HexLookupL[513]= {
"000102030405060708090a0b0c0d0e0f"
"101112131415161718191a1b1c1d1e1f"
"202122232425262728292a2b2c2d2e2f"
"303132333435363738393a3b3c3d3e3f"
"404142434445464748494a4b4c4d4e4f"
"505152535455565758595a5b5c5d5e5f"
"606162636465666768696a6b6c6d6e6f"
"707172737475767778797a7b7c7d7e7f"
"808182838485868788898a8b8c8d8e8f"
"909192939495969798999a9b9c9d9e9f"
"a0a1a2a3a4a5a6a7a8a9aaabacadaeaf"
"b0b1b2b3b4b5b6b7b8b9babbbcbdbebf"
"c0c1c2c3c4c5c6c7c8c9cacbcccdcecf"
"d0d1d2d3d4d5d6d7d8d9dadbdcdddedf"
"e0e1e2e3e4e5e6e7e8e9eaebecedeeef"
"f0f1f2f3f4f5f6f7f8f9fafbfcfdfeff"
};
static uint8_t HexLookupU[513]= {
"000102030405060708090A0B0C0D0E0F"
"101112131415161718191A1B1C1D1E1F"
"202122232425262728292A2B2C2D2E2F"
"303132333435363738393A3B3C3D3E3F"
"404142434445464748494A4B4C4D4E4F"
"505152535455565758595A5B5C5D5E5F"
"606162636465666768696A6B6C6D6E6F"
"707172737475767778797A7B7C7D7E7F"
"808182838485868788898A8B8C8D8E8F"
"909192939495969798999A9B9C9D9E9F"
"A0A1A2A3A4A5A6A7A8A9AAABACADAEAF"
"B0B1B2B3B4B5B6B7B8B9BABBBCBDBEBF"
"C0C1C2C3C4C5C6C7C8C9CACBCCCDCECF"
"D0D1D2D3D4D5D6D7D8D9DADBDCDDDEDF"
"E0E1E2E3E4E5E6E7E8E9EAEBECEDEEEF"
"F0F1F2F3F4F5F6F7F8F9FAFBFCFDFEFF"
};
static int SFStr_append_hex(SFStr *sb, u_char *hex, int nbytes, int prefix, int upper, char sep) {
if(prefix) {
if((sb->cap - sb->len) < 3)
return NO;
sb->str[sb->len++] = '0';
sb->str[sb->len++] = 'x';
}
int hexPerByte = 2;
if(sep) hexPerByte++;
int roomForBytes = (sb->cap - sb->len - 1) / hexPerByte;
if(nbytes > roomForBytes)
nbytes = roomForBytes;
uint16_t *lookup = (uint16_t *)(upper ? HexLookupU : HexLookupL);
for(int ii = 0; ii < nbytes; ii++) {
if(sep && ii) sb->str[sb->len++] = sep;
uint16_t word = ntohs(lookup[hex[ii]]);
sb->str[sb->len++] = word >> 8;
sb->str[sb->len++] = word & 0xFF;
}
sb->str[sb->len] = '\0';
return (nbytes < roomForBytes);
}
static int SFStr_append_array32(SFStr *sb, uint32_t *array32, int n, int net_byte_order, char sep) {
for(int i = 0; i < n; i++) {
char ibuf[32];
uint32_t val32 = array32[i];
if(net_byte_order)
val32 = ntohl(val32);
sprintf(ibuf, "%u", val32);
int ilen = strlen(ibuf);
if((sb->len + 1 + ilen) >= sb->cap)
return NO;
if(i > 0)
sb->str[sb->len++] = sep;
memcpy(sb->str + sb->len, ibuf, ilen);
sb->len += ilen;
sb->str[sb->len] = '\0';
}
return YES;
}
static int SFStr_append_U32(SFStr *sb, char *fmt, uint32_t val32) {
char ibuf[200];
sprintf(ibuf, fmt, val32);
return SFStr_append(sb, ibuf);
}
static int SFStr_append_U64(SFStr *sb, char *fmt, uint64_t val64) {
char ibuf[200];
sprintf(ibuf, fmt, val64);
return SFStr_append(sb, ibuf);
return YES;
}
static int SFStr_append_double(SFStr *sb, char *fmt, double vald) {
char ibuf[200];
sprintf(ibuf, fmt, vald);
return SFStr_append(sb, ibuf);
return YES;
}
static int SFStr_append_mac(SFStr *sb, uint8_t *mac) {
return SFStr_append_hex(sb, mac, 6, NO, NO, 0);
}
static int SFStr_append_ip(SFStr *sb, uint8_t *ip) {
uint32_t array32[4];
for(int i = 0; i < 4; i++)
array32[i] = ip[i];
return SFStr_append_array32(sb, array32, 4, NO, '.');
}
static int SFStr_append_ip6(SFStr *sb, uint8_t *ip6) {
for(int i = 0; i < 16; i += 2) {
if(i > 0
&& SFStr_append(sb, ":") == NO)
return NO;
if(SFStr_append_hex(sb, (ip6+i), 2, NO, NO, 0) == NO)
return NO;
}
return YES;
}
static int SFStr_append_address(SFStr *sb, SFLAddress *address) {
if(address->type == SFLADDRESSTYPE_IP_V4)
return SFStr_append_ip(sb, (uint8_t *)&address->address.ip_v4.addr);
if(address->type == SFLADDRESSTYPE_IP_V6)
return SFStr_append_ip6(sb, address->address.ip_v6.addr);
return SFStr_append(sb, "-");
}
static int SFStr_append_UUID(SFStr *sb, uint8_t *uuid) {
SFStr_append_hex(sb, uuid, 4, NO, NO, 0);
SFStr_append(sb, "-");
SFStr_append_hex(sb, uuid+4, 2, NO, NO, 0);
SFStr_append(sb, "-");
SFStr_append_hex(sb, uuid+6, 2, NO, NO, 0);
SFStr_append(sb, "-");
SFStr_append_hex(sb, uuid+8, 2, NO, NO, 0);
SFStr_append(sb, "-");
return SFStr_append_hex(sb, uuid+10, 6, NO, NO, 0);
}
static int SFStr_append_tag(SFStr *sb, uint32_t tag) {
uint32_t parts[2];
parts[0] = (tag >> 12);
parts[1] = (tag & 0x00000FFF);
return SFStr_append_array32(sb, parts, 2, NO, ':');
}
static int SFStr_append_timestamp(SFStr *sb, time_t ts) {
char tstr[200];
/* ISO8601 compatible localtime */
strftime(tstr, 200, "%Y-%m-%dT%H:%M:%S%z", localtime(&ts));
return SFStr_append(sb, tstr);
}
static int SFStr_append_dataSource(SFStr *sb, uint32_t ds_class, uint32_t ds_index) {
char buf[200];
sprintf(buf, "%u:%u", ds_class, ds_index);
return SFStr_append(sb, buf);
}
static int SFStr_copy(SFStr *sb, char *to, int capacity) {
int max = capacity - 1;
int bytes = max > sb->len ? sb->len : max;
memcpy(to, sb->str, bytes);
to[bytes] = '\0';
return bytes;
}
/*_________________---------------------------__________________
_________________ print functions __________________
-----------------___________________________------------------
*/
static char *printAddress(SFLAddress *address, SFStr *sb) {
SFStr_init(sb);
SFStr_append_address(sb, address);
return SFStr_str(sb);
}
static char *printMAC(uint8_t *mac, SFStr *sb) {
SFStr_init(sb);
SFStr_append_mac(sb, mac);
return SFStr_str(sb);
}
static char *printTag(uint32_t tag, SFStr *sb) {
SFStr_init(sb);
SFStr_append_tag(sb, tag);
return SFStr_str(sb);
}
static char *printTimestamp(time_t ts, SFStr *sb) {
SFStr_init(sb);
SFStr_append_timestamp(sb, ts);
return SFStr_str(sb);
}
static char *printOUI(uint8_t *oui, SFStr *sb) {
SFStr_init(sb);
SFStr_append_hex(sb, oui, 3, NO, YES, '-');
return SFStr_str(sb);
}
static char *printDataSource(uint32_t ds_class, uint32_t ds_index, SFStr *sb) {
SFStr_init(sb);
SFStr_append_dataSource(sb, ds_class, ds_index);
return SFStr_str(sb);
}
static char *printOutputPort_v2v4(uint32_t outputPort, SFStr *sb) {
SFStr_init(sb);
if(outputPort & 0x80000000) {
uint32_t numOutputs = outputPort & 0x7fffffff;
if(numOutputs > 0)
SFStr_append_U32(sb, "multiple %d", numOutputs);
else
SFStr_append(sb, "multiple >1");
}
else SFStr_append_U32(sb, "%u", outputPort);
return SFStr_str(sb);
}
static char *printInOutPort(uint32_t port, uint32_t format, SFStr *sb) {
SFStr_init(sb);
switch(format) {
case 3: SFStr_append_U32(sb, "format==3 %u", port); break;
case 2: SFStr_append_U32(sb, "multiple %u", port); break;
case 1: SFStr_append_U32(sb, "dropCode %u", port); break;
case 0: SFStr_append_U32(sb, "%u", port); break;
}
return SFStr_str(sb);
}
/*_________________---------------------------__________________
_________________ JSON utils __________________
-----------------___________________________------------------
*/
static void json_indent() {
if(sfConfig.jsonIndent) {
putchar('\n');
for(int ii=0; ii<sfConfig.outputDepth; ii++)
putchar(' ');
}
}
static void json_start(char *fname, char bracket) {
if(sfConfig.jsonStart) {
sfConfig.jsonStart = NO;
}
else if(sfConfig.jsonListStart == NO) {
putchar(',');
json_indent();
}
if(fname)
printf("\"%s\":", fname);
putchar(bracket);
sfConfig.outputDepth++;
/* indicate start of list */
sfConfig.jsonListStart = YES;
}
static void json_end(char bracket) {
sfConfig.outputDepth--;
json_indent();
printf("%c", bracket);
/* clear list-start flag in case array/obj was emtpy */
sfConfig.jsonListStart = NO;
}
static void json_start_ob(char *fname) { json_start(fname, '{'); }
static void json_start_ar(char *fname) { json_start(fname, '['); }
static void json_end_ob() { json_end('}'); }
static void json_end_ar() { json_end(']'); }
/*_________________---------------------------__________________
_________________ sf_log __________________
-----------------___________________________------------------
*/
static void sf_log_context(SFSample *sample) {
SFStr agentIP, tag1, tag2, nowstr;
time_t now = sample->pcapTimestamp ?: sample->readTimestamp;
printf("%s %s %u %u %u:%u %s %s ",
printTimestamp(now, &nowstr),
printAddress(&sample->agent_addr, &agentIP),
sample->agentSubId,
sample->sequenceNo,
sample->s.ds_class,
sample->s.ds_index,
printTag(sample->s.sampleType, &tag1),
printTag(sample->s.elementType, &tag2));
}
static void sf_log(SFSample *sample, char *fmt, ...) {
/* don't print anything here unless exporting in FULL or SCRIPT formats */
/* scripts like to have all the context on every line */
if(sfConfig.outputFormat == SFLFMT_SCRIPT)