19d254bbbb
...sharing the same filesystem. Instead of a fixed path for the UNIX domain socket, passt now uses a path with a counter, probing for existing instances, and picking the first free one. The demo script is updated accordingly -- it can now be started several times to create multiple namespaces with an instance of passt each, with addressing reflecting separate subnets, and NDP proxying between them. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
80 lines
1.9 KiB
C
80 lines
1.9 KiB
C
#define UNIX_SOCK_MAX 100
|
|
#define UNIX_SOCK_PATH "/tmp/passt_%i.socket"
|
|
|
|
/**
|
|
* struct tap_msg - Generic message descriptor for arrays of messages
|
|
* @start: Pointer to message start
|
|
* @l4_start: Pointer to L4 header
|
|
* @len: Message length, with L2 headers
|
|
* @l4_len: Message length, with L4 headers
|
|
*/
|
|
struct tap_msg {
|
|
char *start;
|
|
char *l4h;
|
|
size_t len;
|
|
size_t l4_len;
|
|
};
|
|
|
|
#define SOCK_BUF_BYTES (ETH_MAX_MTU * 4)
|
|
|
|
#include "icmp.h"
|
|
#include "tcp.h"
|
|
#include "udp.h"
|
|
|
|
#include <resolv.h> /* For MAXNS below */
|
|
|
|
struct fqdn {
|
|
char n[NS_MAXDNAME];
|
|
};
|
|
|
|
#include <net/if.h>
|
|
|
|
/**
|
|
* struct ctx - Execution context
|
|
* @epollfd: file descriptor for epoll instance
|
|
* @fd_unix: AF_UNIX socket for tap file descriptor
|
|
* @v4: Enable IPv4 transport
|
|
* @mac: Host MAC address
|
|
* @mac_guest: Guest MAC address
|
|
* @addr4: IPv4 address for external, routable interface
|
|
* @addr4_seen: Latest IPv4 address seen as source from tap
|
|
* @mask4: IPv4 netmask, network order
|
|
* @gw4: Default IPv4 gateway, network order
|
|
* @dns4: IPv4 DNS addresses, zero-terminated, network order
|
|
* @dns_search: DNS search list
|
|
* @v6: Enable IPv6 transport
|
|
* @addr6: IPv6 address for external, routable interface
|
|
* @addr6_seen: Latest IPv6 global/site address seen as source from tap
|
|
* @addr6_ll_seen: Latest IPv6 link-local address seen as source from tap
|
|
* @gw6: Default IPv6 gateway
|
|
* @dns4: IPv4 DNS addresses, zero-terminated
|
|
* @ifn: Name of routable interface
|
|
*/
|
|
struct ctx {
|
|
int epollfd;
|
|
int fd_unix;
|
|
unsigned char mac[ETH_ALEN];
|
|
unsigned char mac_guest[ETH_ALEN];
|
|
|
|
int v4;
|
|
uint32_t addr4;
|
|
uint32_t addr4_seen;
|
|
uint32_t mask4;
|
|
uint32_t gw4;
|
|
uint32_t dns4[MAXNS + 1];
|
|
|
|
struct fqdn dns_search[MAXDNSRCH];
|
|
|
|
int v6;
|
|
struct in6_addr addr6;
|
|
struct in6_addr addr6_seen;
|
|
struct in6_addr addr6_ll_seen;
|
|
struct in6_addr gw6;
|
|
struct in6_addr dns6[MAXNS + 1];
|
|
|
|
char ifn[IF_NAMESIZE];
|
|
|
|
struct icmp_ctx icmp;
|
|
struct tcp_ctx tcp;
|
|
struct udp_ctx udp;
|
|
};
|