48 lines
1.2 KiB
C
48 lines
1.2 KiB
C
|
#define CT_SIZE 4096
|
||
|
|
#define UNIX_SOCK_PATH "/tmp/merd.socket"
|
||
|
|
|
||
|
|
/**
|
||
|
|
* struct ct4 - IPv4 connection tracking entry
|
||
|
|
* @p: IANA protocol number
|
||
|
|
* @sa: Source address (as seen from tap interface)
|
||
|
|
* @da: Destination address
|
||
|
|
* @sp: Source port, network order
|
||
|
|
* @dp: Destination port, network order
|
||
|
|
* @hd: Destination MAC address
|
||
|
|
* @hs: Source MAC address
|
||
|
|
* @fd: File descriptor for corresponding AF_INET socket
|
||
|
|
*/
|
||
|
|
struct ct4 {
|
||
|
|
uint8_t p;
|
||
|
|
uint32_t sa;
|
||
|
|
uint32_t da;
|
||
|
|
uint16_t sp;
|
||
|
|
uint16_t dp;
|
||
|
|
unsigned char hd[ETH_ALEN];
|
||
|
|
unsigned char hs[ETH_ALEN];
|
||
|
|
int fd;
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* struct ctx - Execution context
|
||
|
|
* @epollfd: file descriptor for epoll instance
|
||
|
|
* @fd_unix: AF_UNIX socket for tap file descriptor
|
||
|
|
* @map4: Connection tracking table
|
||
|
|
* @addr4: IPv4 address for external, routable interface
|
||
|
|
* @mask4: IPv4 netmask, network order
|
||
|
|
* @gw4: Default IPv4 gateway, network order
|
||
|
|
* @dns4: IPv4 DNS address, network order
|
||
|
|
* @ifn: Name of routable interface
|
||
|
|
*/
|
||
|
|
struct ctx {
|
||
|
|
int epollfd;
|
||
|
|
int fd_unix;
|
||
|
|
struct ct4 map4[CT_SIZE];
|
||
|
|
unsigned char mac[ETH_ALEN];
|
||
|
|
unsigned long addr4;
|
||
|
|
unsigned long mask4;
|
||
|
|
unsigned long gw4;
|
||
|
|
unsigned long dns4;
|
||
|
|
char ifn[IF_NAMESIZE];
|
||
|
|
};
|