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update --fix-gro

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This commit is contained in:
wangyu 2019-07-15 13:00:16 -04:00
parent c1dfd4e928
commit 8c81f7673b
6 changed files with 23 additions and 12 deletions
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2
common.h
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@ -349,7 +349,7 @@ struct not_copy_able_t
const int single_max_data_len=1800;
const int max_data_len=single_max_data_len*10;
const int buf_len=max_data_len+400;
const int buf_len=max_data_len+800;
//const int max_data_len_gro=max_data_len*10;
//const int buf_len_gro=max_data_len_gro+400;

23
connection.cpp
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@ -497,8 +497,8 @@ int send_safer(conn_info_t &conn_info,char type,const char* data,int len) //saf
return -1;
}
write_u16(send_data_buf2,new_len);
//send_data_buf2[0]^=gro_xor[0];
//send_data_buf2[1]^=gro_xor[1];
send_data_buf2[0]^=gro_xor[0];
send_data_buf2[1]^=gro_xor[1];
new_len+=2;
}
@ -653,30 +653,35 @@ int recv_safer_multi(conn_info_t &conn_info,vector<char> &type_arr,vector<string
} else
{
char *ori_recv_data=recv_data;
int ori_recv_len=recv_len;
//mylog(log_debug,"recv_len:%d\n",recv_len);
int cnt=0;
while(recv_len>2)
{
cnt++;
int single_len_no_xor;
single_len_no_xor=read_u16(recv_data);
int single_len;
//recv_data[0]^=gro_xor[0];
//recv_data[1]^=gro_xor[1];
recv_data[0]^=gro_xor[0];
recv_data[1]^=gro_xor[1];
single_len=read_u16(recv_data);
recv_len-=2;
recv_data+=2;
if(single_len > recv_len)
{
mylog(log_debug,"illegal single_len %d, recv_len %d left,dropped\n",single_len,recv_len);
mylog(log_debug,"illegal single_len %d(%d), recv_len %d left,dropped\n",single_len,single_len_no_xor,recv_len);
break;
}
if(single_len> single_max_data_len )
{
mylog(log_warn,"single_len %d > %d\n",single_len,single_max_data_len);
mylog(log_warn,"single_len %d(%d) > %d, maybe you need to turn down mtu at upper level\n",single_len,single_len_no_xor,single_max_data_len);
}
int ret = reserved_parse_safer(conn_info, recv_data, single_len, type, data, len);
if(ret!=0)
{
mylog(log_debug,"parse failed, offset= %d,single_len=%d\n",recv_data-ori_recv_data,single_len);
mylog(log_debug,"parse failed, offset= %d,single_len=%d(%d)\n",(int)(recv_data-ori_recv_data),single_len,single_len_no_xor);
} else{
type_arr.push_back(type);
data_arr.emplace_back(data,data+len);
@ -685,6 +690,10 @@ int recv_safer_multi(conn_info_t &conn_info,vector<char> &type_arr,vector<string
recv_data+=single_len;
recv_len-=single_len;
}
if(cnt>1)
{
mylog(log_debug,"got a suspected gro packet, %d packets recovered, recv_len=%d, loop_cnt=%d\n",(int)data_arr.size(),ori_recv_len,cnt);
}
return 0;
}
}

4
encrypt.cpp
View File

@ -26,7 +26,7 @@ unsigned char hmac_key_decrypt[hmac_key_len + 100]; //key for hmac
unsigned char cipher_key_encrypt[cipher_key_len + 100]; //key for aes etc.
unsigned char cipher_key_decrypt[cipher_key_len + 100]; //key for aes etc.
char gro_xor[16+100];//dirty fix for gro
char gro_xor[256+100];//dirty fix for gro
unordered_map<int, const char *> auth_mode_tostring = {{auth_none, "none"}, {auth_md5, "md5"}, {auth_crc32, "crc32"},{auth_simple,"simple"},{auth_hmac_sha1,"hmac_sha1"},};
@ -87,7 +87,7 @@ int my_init_keys(const char * user_passwd,int is_client)
assert( hkdf_sha256_expand( pbkdf2_output1,32, (unsigned char *)info_hmac_decrypt,strlen(info_hmac_decrypt), hmac_key_decrypt, hmac_key_len ) ==0);
const char *gro_info="gro";
assert( hkdf_sha256_expand( pbkdf2_output1,32, (unsigned char *)gro_info,strlen(gro_info), (unsigned char *)gro_xor, 16 ) ==0);
assert( hkdf_sha256_expand( pbkdf2_output1,32, (unsigned char *)gro_info,strlen(gro_info), (unsigned char *)gro_xor, 256 ) ==0);
}
print_binary_chars(normal_key,16);

2
encrypt.h
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@ -34,7 +34,7 @@ extern cipher_mode_t cipher_mode;
extern unordered_map<int, const char *> auth_mode_tostring;
extern unordered_map<int, const char *> cipher_mode_tostring;
extern char gro_xor[16+100];
extern char gro_xor[256+100];
int cipher_decrypt(const char *data,char *output,int &len,char * key);//internal interface ,exposed for test only
int cipher_encrypt(const char *data,char *output,int &len,char * key);//internal interface ,exposed for test only

2
misc.cpp
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@ -185,6 +185,8 @@ void print_help()
printf(" --mtu-warn <number> mtu warning threshold, unit:byte, default:1375\n");
printf(" --clear clear any iptables rules added by this program.overrides everything\n");
printf(" --retry-on-error retry on error, allow to start udp2raw before network is initialized\n");
printf(" --fix-gro try to fix huge packet caused by GRO. this option is at an early stage.\n");
printf(" make sure client and server are at same version\n");
printf(" -h,--help print this help message\n");
//printf("common options,these options must be same on both side\n");

2
network.cpp
View File

@ -849,7 +849,7 @@ int pre_recv_raw_packet()
{
if(g_fix_gro==0)
{
mylog(log_warn, "huge packet, data_len %d > %d(single_max_data_len) dropped\n", g_packet_buf_len,
mylog(log_warn, "huge packet, data_len %d > %d(single_max_data_len) dropped, maybe you need to turn down mtu at upper level, or you may take a look at --fix-gro\n", g_packet_buf_len,
single_max_data_len);
return -1;
}