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better bpf filter

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This commit is contained in:
wangyu 2017-08-18 18:23:40 +08:00
parent ee4fe6cfcf
commit 12741d9b9b
1 changed files with 8 additions and 8 deletions
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16
network.cpp
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@ -46,8 +46,8 @@ struct sock_filter code_tcp_old[] = {
{ 0x6, 0, 0, 0x00000000 },//12
};
struct sock_filter code_tcp[] = {
{ 0x5, 0, 0, 0x00000001 },//0 //jump to 2,dirty hack from tcpdump -d's output
{ 0x5, 0, 0, 0x00000000 },//1
//{ 0x5, 0, 0, 0x00000001 },//0 //jump to 2,dirty hack from tcpdump -d's output
//{ 0x5, 0, 0, 0x00000000 },//1
{ 0x30, 0, 0, 0x00000009 },//2
{ 0x15, 0, 6, 0x00000006 },//3
{ 0x28, 0, 0, 0x00000006 },//4
@ -58,11 +58,11 @@ struct sock_filter code_tcp[] = {
{ 0x6, 0, 0, 0x0000ffff },//9
{ 0x6, 0, 0, 0x00000000 },//10
};
int code_tcp_port_index=8;
int code_tcp_port_index=6;
struct sock_filter code_udp[] = {
{ 0x5, 0, 0, 0x00000001 },
{ 0x5, 0, 0, 0x00000000 },
//{ 0x5, 0, 0, 0x00000001 },
//{ 0x5, 0, 0, 0x00000000 },
{ 0x30, 0, 0, 0x00000009 },
{ 0x15, 0, 6, 0x00000011 },
{ 0x28, 0, 0, 0x00000006 },
@ -73,10 +73,10 @@ struct sock_filter code_udp[] = {
{ 0x6, 0, 0, 0x0000ffff },
{ 0x6, 0, 0, 0x00000000 },
};
int code_udp_port_index=8;
int code_udp_port_index=6;
struct sock_filter code_icmp[] = {
{ 0x5, 0, 0, 0x00000001 },
{ 0x5, 0, 0, 0x00000000 },
//{ 0x5, 0, 0, 0x00000001 },
//{ 0x5, 0, 0, 0x00000000 },
{ 0x30, 0, 0, 0x00000009 },
{ 0x15, 0, 1, 0x00000001 },
{ 0x6, 0, 0, 0x0000ffff },