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Add GRE utils

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This commit is contained in:
luwenpeng
2024-06-05 16:44:32 +08:00
parent 3ce5ed11db
commit a50ecb3dbb
5 changed files with 338 additions and 158 deletions
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3
src/packet/eth_utils.h
View File

@@ -129,6 +129,7 @@ static inline int is_eth_proto(uint16_t proto)
case ETH_P_TRAILER:
case ETH_P_PHONET:
case ETH_P_IEEE802154:
case 0x880B: // PPP：Point-to-Point Protoco
return 1;
default:
return 0;
@@ -269,6 +270,8 @@ static inline const char *eth_proto_to_str(uint16_t proto)
return "ETH_P_PHONET";
case ETH_P_IEEE802154:
return "ETH_P_IEEE802154";
case 0x880B:
return "PPP";
default:
return "ETH_P_UNKNOWN";
}

187
src/packet/gre_utils.h Normal file
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@@ -0,0 +1,187 @@
#ifndef _GRE_UTILS_H
#define _GRE_UTILS_H
#ifdef __cplusplus
extern "C"
{
#endif
#include <stdio.h>
#include <string.h>
#include <arpa/inet.h>
#include "eth_utils.h"
/*
* GRE Header Format (Version 0)
*
* 0 1 2 3
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* |C|R|K|S|s|Recur| Flags | Ver | Protocol Type |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Checksum (optional) | Offset (optional) |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Key (optional) |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Sequence Number (optional) |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Routing (optional)
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*
* 0 1 2 3
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Address Family | SRE Offset | SRE Length |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Routing Information ...
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*
* https://datatracker.ietf.org/doc/html/rfc1701
* https://datatracker.ietf.org/doc/html/rfc2890
*/
/*
* Enhanced GRE header (Version 1)
*
* 0 1 2 3
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* |C|R|K|S|s|Recur|A| Flags | Ver | Protocol Type |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Key (HW) Payload Length | Key (LW) Call ID |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Sequence Number (Optional) |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Acknowledgment Number (Optional) |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*
* https://datatracker.ietf.org/doc/html/rfc2637
*/
struct gre_hdr
{
uint16_t flags_ver;
uint16_t protocol;
};
struct sre
{
uint16_t address_family;
uint8_t sre_offset;
uint8_t sre_length;
};
#define GRE_CHECKSUM 0x8000
#define GRE_ROUTING 0x4000
#define GRE_KEY 0x2000
#define GRE_SEQUENCE 0x1000
#define GRE_STRICTSOURCE 0x0800
#define GRE_RECURSION 0x0700
#define GRE_ACK 0x0080 /* only in special PPTPized GRE header */
#define GRE_RESERVED_PPP 0x0078 /* only in special PPTPized GRE header */
#define GRE_RESERVED 0x00F8
/******************************************************************************
* get
******************************************************************************/
static inline uint8_t gre_hdr_get_ver(const struct gre_hdr *hdr)
{
return ntohs(hdr->flags_ver) & 0x07;
}
// ethernet protocol type
static inline uint16_t gre_hdr_get_proto(const struct gre_hdr *hdr)
{
return ntohs(hdr->protocol);
}
static inline uint16_t calc_grev0_hdr_len(const char *data, uint32_t len)
{
const struct gre_hdr *hdr = (const struct gre_hdr *)data;
uint16_t hdr_len = 4;
uint16_t flags = ntohs(hdr->flags_ver);
if ((flags & GRE_CHECKSUM) || (flags & GRE_ROUTING))
{
hdr_len += 4; // skip checksum and offset fields
}
if (flags & GRE_KEY)
{
hdr_len += 4; // skip key field
}
if (flags & GRE_SEQUENCE)
{
hdr_len += 4; // skip sequence number field
}
if (flags & GRE_ROUTING)
{
while (hdr_len + sizeof(struct sre) <= len)
{
struct sre *sre = (struct sre *)((char *)data + hdr_len);
if (sre->sre_length == 0)
{
hdr_len += sizeof(struct sre);
break;
}
else
{
hdr_len += sizeof(struct sre) + sre->sre_length;
}
}
}
return hdr_len;
}
static inline uint16_t calc_grev1_hdr_len(const char *data, uint32_t len)
{
const struct gre_hdr *hdr = (const struct gre_hdr *)data;
uint16_t hdr_len = 8;
uint16_t flags = ntohs(hdr->flags_ver);
if (flags & GRE_SEQUENCE)
{
hdr_len += 4;
}
if (flags & GRE_ACK)
{
hdr_len += 4;
}
return hdr_len;
}
static inline uint16_t calc_gre_hdr_len(const char *data, uint32_t len)
{
const struct gre_hdr *hdr = (const struct gre_hdr *)data;
switch (gre_hdr_get_ver(hdr))
{
case 0:
return calc_grev0_hdr_len(data, len);
case 1:
return calc_grev1_hdr_len(data, len);
default:
return 0;
}
}
/******************************************************************************
* set
******************************************************************************/
// TODO
/******************************************************************************
* print
******************************************************************************/
static inline int gre_hdr_to_str(const struct gre_hdr *hdr, char *buf, size_t size)
{
memset(buf, 0, size);
uint16_t proto = gre_hdr_get_proto(hdr);
return snprintf(buf, size, "GRE: version=%u proto=%s",
gre_hdr_get_ver(hdr), eth_proto_to_str(proto));
}
#ifdef __cplusplus
}
#endif
#endif

166
src/packet/packet.cpp
View File

@@ -6,12 +6,13 @@
#include "uthash.h"
#include "packet_priv.h"
#include "eth_utils.h"
#include "gre_utils.h"
#include "udp_utils.h"
#include "tcp_utils.h"
#include "ipv4_utils.h"
#include "ipv6_utils.h"
#include "mpls_utils.h"
#include "eth_utils.h"
#include "vlan_utils.h"
#include "vxlan_utils.h"
@@ -56,7 +57,6 @@ static inline void set_tuple6(const char *data, enum layer_type type, struct tup
static inline struct packet_layer *get_free_layer(struct packet *pkt);
static inline uint16_t get_gtp_hdr_len(const char *data, uint16_t len);
static inline uint16_t get_gre_hdr_len(const char *data, uint16_t len);
static inline uint16_t get_l2tpv2_hdr_len(const char *data, uint16_t len);
// 数据链路层
@@ -354,143 +354,6 @@ static inline uint16_t get_gtp_hdr_len(const char *data, uint16_t len)
return hdr_offset;
}
static inline uint16_t get_gre_hdr_len(const char *data, uint16_t len)
{
/*
* GRE Header Format (Version 0)
*
* 0 1 2 3
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* |C|R|K|S|s|Recur| Flags | Ver | Protocol Type |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Checksum (optional) | Offset (optional) |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Key (optional) |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Sequence Number (optional) |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Routing (optional)
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*
* 0 1 2 3
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Address Family | SRE Offset | SRE Length |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Routing Information ...
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*
* https://datatracker.ietf.org/doc/html/rfc1701
* https://datatracker.ietf.org/doc/html/rfc2890
*/
/*
* Enhanced GRE header (Version 1)
*
* 0 1 2 3
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* |C|R|K|S|s|Recur|A| Flags | Ver | Protocol Type |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Key (HW) Payload Length | Key (LW) Call ID |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Sequence Number (Optional) |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Acknowledgment Number (Optional) |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*
* https://datatracker.ietf.org/doc/html/rfc2637
*/
/* bit positions for flags in header */
#define GRE_CHECKSUM 0x8000
#define GRE_ROUTING 0x4000
#define GRE_KEY 0x2000
#define GRE_SEQUENCE 0x1000
#define GRE_STRICTSOURCE 0x0800
#define GRE_RECURSION 0x0700
#define GRE_ACK 0x0080 /* only in special PPTPized GRE header */
#define GRE_RESERVED_PPP 0x0078 /* only in special PPTPized GRE header */
#define GRE_RESERVED 0x00F8
#define GRE_VERSION 0x0007
if (len < 4)
{
return 0;
}
struct SRE
{
uint16_t address_family;
uint8_t sre_offset;
uint8_t sre_length;
} __attribute__((__packed__));
uint16_t sre_size = sizeof(struct SRE);
const uint16_t *gre = (const uint16_t *)data;
uint16_t flags = ntohs(gre[0]);
uint16_t version = flags & GRE_VERSION;
uint16_t hdr_offset = 0;
if (version == 0)
{
hdr_offset = 4;
if ((flags & GRE_CHECKSUM) || (flags & GRE_ROUTING))
{
hdr_offset += 4;
}
if (flags & GRE_KEY)
{
hdr_offset += 4;
}
if (flags & GRE_SEQUENCE)
{
hdr_offset += 4;
}
if (flags & GRE_ROUTING)
{
while (hdr_offset + sre_size <= len)
{
struct SRE *sre = (struct SRE *)((char *)data + hdr_offset);
if (sre->sre_length == 0)
{
hdr_offset += sre_size;
break;
}
else
{
hdr_offset += sre_size + sre->sre_length;
}
}
}
}
else if (version == 1)
{
hdr_offset = 8;
if (flags & GRE_SEQUENCE)
{
hdr_offset += 4;
}
if (flags & GRE_ACK)
{
hdr_offset += 4;
}
}
else
{
return 0;
}
if (hdr_offset > len)
{
return 0;
}
return hdr_offset;
}
static inline uint16_t get_l2tpv2_hdr_len(const char *data, uint16_t len)
{
/*
@@ -1049,12 +912,7 @@ static inline const char *parse_auth(struct packet *pkt, const char *data, uint1
static inline const char *parse_gre(struct packet *pkt, const char *data, uint16_t len)
{
#define GRE_PRO_IPV4 (0x0800)
#define GRE_PRO_IPV6 (0x86DD)
#define GRE_PRO_ARP (0x0806)
#define GRE_PRO_PPP (0x880B)
uint16_t hdr_len = get_gre_hdr_len(data, len);
uint16_t hdr_len = calc_gre_hdr_len(data, len);
if (unlikely(hdr_len == 0 || hdr_len > len))
{
PACKET_LOG_DATA_INSUFFICIENCY(pkt, LAYER_TYPE_GRE);
@@ -1066,21 +924,10 @@ static inline const char *parse_gre(struct packet *pkt, const char *data, uint16
{
return data;
}
uint16_t next_proto = ntohs(*((uint16_t *)data + 1));
uint16_t next_proto = gre_hdr_get_proto((const struct gre_hdr *)data);
SET_LAYER(pkt, layer, LAYER_TYPE_GRE, hdr_len, data, len, 0);
switch (next_proto)
{
case GRE_PRO_IPV4:
return parse_ipv4(pkt, layer->pld_ptr, layer->pld_len);
case GRE_PRO_IPV6:
return parse_ipv6(pkt, layer->pld_ptr, layer->pld_len);
case GRE_PRO_PPP:
return parse_ppp(pkt, layer->pld_ptr, layer->pld_len);
default:
PACKET_LOG_UNSUPPORT_PROTO(pkt, LAYER_TYPE_GRE, next_proto);
return layer->pld_ptr;
}
return parse_l3(pkt, next_proto, layer->pld_ptr, layer->pld_len);
}
static inline const char *parse_udp(struct packet *pkt, const char *data, uint16_t len)
@@ -1283,6 +1130,8 @@ static inline const char *parse_l3(struct packet *pkt, uint16_t next_proto, cons
return parse_pppoe_ses(pkt, data, len);
case ETH_P_MPLS_UC:
return parse_mpls(pkt, data, len);
case 0x880b:
return parse_ppp(pkt, data, len);
default:
PACKET_LOG_UNSUPPORT_ETHPROTO(pkt, next_proto);
return data;
@@ -1384,6 +1233,7 @@ void packet_print_str(const struct packet *pkt)
case LAYER_TYPE_IPAH:
break;
case LAYER_TYPE_GRE:
used = gre_hdr_to_str((const struct gre_hdr *)layer->hdr_ptr, buffer, sizeof(buffer));
break;
case LAYER_TYPE_UDP:
used = udp_hdr_to_str((const struct udphdr *)layer->hdr_ptr, buffer, sizeof(buffer));

4
src/packet/test/CMakeLists.txt
View File

@@ -25,6 +25,9 @@ target_link_libraries(gtest_vlan_utils packet gtest)
add_executable(gtest_vxlan_utils gtest_vxlan_utils.cpp)
target_link_libraries(gtest_vxlan_utils packet gtest)
add_executable(gtest_gre_utils gtest_gre_utils.cpp)
target_link_libraries(gtest_gre_utils packet gtest)
add_executable(gtest_packet_frag gtest_packet_frag.cpp)
target_link_libraries(gtest_packet_frag packet gtest)
@@ -38,4 +41,5 @@ gtest_discover_tests(gtest_mpls_utils)
gtest_discover_tests(gtest_eth_utils)
gtest_discover_tests(gtest_vlan_utils)
gtest_discover_tests(gtest_vxlan_utils)
gtest_discover_tests(gtest_gre_utils)
gtest_discover_tests(gtest_packet_frag)

136
src/packet/test/gtest_gre_utils.cpp Normal file
View File

@@ -0,0 +1,136 @@
#include <gtest/gtest.h>
#include "gre_utils.h"
/*
* Generic Routing Encapsulation (IP)
* Flags and Version: 0x0000
* 0... .... .... .... = Checksum Bit: No
* .0.. .... .... .... = Routing Bit: No
* ..0. .... .... .... = Key Bit: No
* ...0 .... .... .... = Sequence Number Bit: No
* .... 0... .... .... = Strict Source Route Bit: No
* .... .000 .... .... = Recursion control: 0
* .... .... 0000 0... = Flags (Reserved): 0
* .... .... .... .000 = Version: GRE (0)
* Protocol Type: IP (0x0800)
*/
unsigned char ver0_data1[] = {
0x00, 0x00, 0x08, 0x00};
TEST(GRE_VER0_UTILS, NO_OPTION)
{
const struct gre_hdr *hdr = (struct gre_hdr *)ver0_data1;
EXPECT_TRUE(gre_hdr_get_ver(hdr) == 0);
EXPECT_TRUE(gre_hdr_get_proto(hdr) == 0x0800);
EXPECT_TRUE(calc_gre_hdr_len((const char *)ver0_data1, sizeof(ver0_data1)) == 4);
}
/*
* Generic Routing Encapsulation (IP)
* Flags and Version: 0x2000
* 0... .... .... .... = Checksum Bit: No
* .0.. .... .... .... = Routing Bit: No
* ..1. .... .... .... = Key Bit: Yes
* ...0 .... .... .... = Sequence Number Bit: No
* .... 0... .... .... = Strict Source Route Bit: No
* .... .000 .... .... = Recursion control: 0
* .... .... 0000 0... = Flags (Reserved): 0
* .... .... .... .000 = Version: GRE (0)
* Protocol Type: IP (0x0800)
* Key: 0x00000384
*/
unsigned char ver0_data2[] = {0x20, 0x00, 0x08, 0x00, 0x00, 0x00, 0x03, 0x84};
TEST(GRE_VER0_UTILS, KEY_OPTION)
{
const struct gre_hdr *hdr = (struct gre_hdr *)ver0_data2;
EXPECT_TRUE(gre_hdr_get_ver(hdr) == 0);
EXPECT_TRUE(gre_hdr_get_proto(hdr) == 0x0800);
EXPECT_TRUE(calc_gre_hdr_len((const char *)ver0_data2, sizeof(ver0_data2)) == 8);
}
/*
* Generic Routing Encapsulation (IP)
* Flags and Version: 0xc000
* 1... .... .... .... = Checksum Bit: Yes
* .1.. .... .... .... = Routing Bit: Yes
* ..0. .... .... .... = Key Bit: No
* ...0 .... .... .... = Sequence Number Bit: No
* .... 0... .... .... = Strict Source Route Bit: No
* .... .000 .... .... = Recursion control: 0
* .... .... 0000 0... = Flags (Reserved): 0
* .... .... .... .000 = Version: GRE (0)
* Protocol Type: IP (0x0800)
* Checksum: 0x0000 incorrect, should be 0xea95
* [Expert Info (Warning/Protocol): Incorrect GRE Checksum [should be 0xea95]]
* [Incorrect GRE Checksum [should be 0xea95]]
* [Severity level: Warning]
* [Group: Protocol]
* [Checksum Status: Bad]
* Offset: 44
* Routing
* Address Family: 2
* SRE Offset: 0
* SRE Length: 44
* Routing Information: 6c696e6b5f696e666f206c696e6b5f696e666f206c696e6b5f696e666f206c696e6b5f696e666f2000000000
* Routing
* Address Family: 0
* SRE Offset: 0
* SRE Length: 0
*/
unsigned char ver0_data3[] = {
0xc0, 0x00, 0x08, 0x00, 0x00, 0x00, 0x00, 0x2c, 0x00, 0x02, 0x00, 0x2c, 0x6c, 0x69, 0x6e, 0x6b, 0x5f, 0x69, 0x6e, 0x66, 0x6f, 0x20, 0x6c, 0x69, 0x6e, 0x6b,
0x5f, 0x69, 0x6e, 0x66, 0x6f, 0x20, 0x6c, 0x69, 0x6e, 0x6b, 0x5f, 0x69, 0x6e, 0x66, 0x6f, 0x20, 0x6c, 0x69, 0x6e, 0x6b, 0x5f, 0x69, 0x6e, 0x66, 0x6f, 0x20,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
TEST(GRE_VER0_UTILS, CHECKSUM_ROUTING_OPTION)
{
const struct gre_hdr *hdr = (struct gre_hdr *)ver0_data3;
EXPECT_TRUE(gre_hdr_get_ver(hdr) == 0);
EXPECT_TRUE(gre_hdr_get_proto(hdr) == 0x0800);
EXPECT_TRUE(calc_gre_hdr_len((const char *)ver0_data3, sizeof(ver0_data3)) == 60);
}
/*
* Generic Routing Encapsulation (PPP)
* Flags and Version: 0x3081
* 0... .... .... .... = Checksum Bit: No
* .0.. .... .... .... = Routing Bit: No
* ..1. .... .... .... = Key Bit: Yes
* ...1 .... .... .... = Sequence Number Bit: Yes
* .... 0... .... .... = Strict Source Route Bit: No
* .... .000 .... .... = Recursion control: 0
* .... .... 1... .... = Acknowledgment: Yes
* .... .... .000 0... = Flags (Reserved): 0
* .... .... .... .001 = Version: Enhanced GRE (1)
* Protocol Type: PPP (0x880b)
* Payload Length: 103
* Call ID: 6016
* Sequence Number: 430001
* Acknowledgment Number: 539254
*/
unsigned char ver1_data1[] = {
0x30, 0x81, 0x88, 0x0b, 0x00, 0x67, 0x17, 0x80, 0x00, 0x06, 0x8f, 0xb1, 0x00, 0x08, 0x3a, 0x76};
TEST(GRE_VER1_UTILS, SEQ_ACK_OPTION)
{
const struct gre_hdr *hdr = (struct gre_hdr *)ver1_data1;
EXPECT_TRUE(gre_hdr_get_ver(hdr) == 1);
EXPECT_TRUE(gre_hdr_get_proto(hdr) == 0x880b);
EXPECT_TRUE(calc_gre_hdr_len((const char *)ver1_data1, sizeof(ver1_data1)) == 16);
}
int main(int argc, char **argv)
{
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}