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#define CT_SIZE 4096
#define UNIX_SOCK_PATH "/tmp/passt.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 ct6 - IPv6 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_INET6 socket
*/
struct ct6 {
uint8_t p;
struct in6_addr sa;
struct in6_addr 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
* @v4: Enable IPv4 transport
* @addr4: IPv4 address for external, routable interface
* @mask4: IPv4 netmask, network order
* @gw4: Default IPv4 gateway, network order
* @dns4: IPv4 DNS address, network order
* @v6: Enable IPv6 transport
* @addr6: IPv6 address for external, routable interface
* @gw6: Default IPv6 gateway
* @dns4: IPv6 DNS address
* @ifn: Name of routable interface
*/
struct ctx {
int epollfd;
int fd_unix;
struct ct4 map4[CT_SIZE];
struct ct6 map6[CT_SIZE];
unsigned char mac[ETH_ALEN];
int v4;
unsigned long addr4;
unsigned long mask4;
unsigned long gw4;
unsigned long dns4;
int v6;
struct in6_addr addr6;
struct in6_addr gw6;
struct in6_addr dns6;
char ifn[IF_NAMESIZE];
};
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