mirror of
https://passt.top/passt
synced 2024-07-01 23:42:41 +00:00
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>
81 lines
1.9 KiB
C
81 lines
1.9 KiB
C
#define UNIX_SOCK_MAX 100
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#define UNIX_SOCK_PATH "/tmp/passt_%i.socket"
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/**
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* struct tap_msg - Generic message descriptor for arrays of messages
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* @start: Pointer to message start
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* @l4_start: Pointer to L4 header
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* @len: Message length, with L2 headers
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* @l4_len: Message length, with L4 headers
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*/
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struct tap_msg {
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char *start;
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char *l4h;
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size_t len;
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size_t l4_len;
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};
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#define SOCK_BUF_BYTES (ETH_MAX_MTU * 4)
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#include "icmp.h"
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#include "tcp.h"
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#include "udp.h"
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#include <resolv.h> /* For MAXNS below */
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struct fqdn {
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char n[NS_MAXDNAME];
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};
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#include <net/if.h>
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/**
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* struct ctx - Execution context
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* @epollfd: file descriptor for epoll instance
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* @fd_unix: AF_UNIX socket for tap file descriptor
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* @v4: Enable IPv4 transport
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* @mac: Host MAC address
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* @mac_guest: Guest MAC address
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* @addr4: IPv4 address for external, routable interface
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* @addr4_seen: Latest IPv4 address seen as source from tap
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* @mask4: IPv4 netmask, network order
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* @gw4: Default IPv4 gateway, network order
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* @dns4: IPv4 DNS addresses, zero-terminated, network order
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* @dns_search: DNS search list
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* @v6: Enable IPv6 transport
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* @addr6: IPv6 address for external, routable interface
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* @addr6_seen: Latest IPv6 global/site address seen as source from tap
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* @addr6_ll_seen: Latest IPv6 link-local address seen as source from tap
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* @gw6: Default IPv6 gateway
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* @dns4: IPv4 DNS addresses, zero-terminated
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* @ifn: Name of routable interface
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*/
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struct ctx {
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int epollfd;
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int fd_unix;
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unsigned char mac[ETH_ALEN];
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unsigned char mac_guest[ETH_ALEN];
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int v4;
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uint32_t addr4;
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uint32_t addr4_seen;
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uint32_t mask4;
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uint32_t gw4;
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uint32_t dns4[MAXNS + 1];
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struct fqdn dns_search[MAXDNSRCH];
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int v6;
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struct in6_addr addr6;
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struct in6_addr addr6_seen;
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struct in6_addr addr6_ll_seen;
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struct in6_addr gw6;
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struct in6_addr dns6[MAXNS + 1];
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char ifn[IF_NAMESIZE];
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struct icmp_ctx icmp;
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struct tcp_ctx tcp;
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struct udp_ctx udp;
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};
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