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passt, pasta: Introduce command-line options and port re-mapping

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Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
This commit is contained in:
Stefano Brivio 2021-08-12 15:42:43 +02:00
parent 1b1b27c06a
commit 1e49d194d0
17 changed files with 1657 additions and 704 deletions

40
passt.h
View file

@ -52,11 +52,9 @@ union epoll_ref {
#define PKT_BUF_BYTES MAX(TAP_BUF_BYTES, 0)
extern char pkt_buf [PKT_BUF_BYTES];
#ifdef DEBUG
extern char *ip_proto_str[];
#define IP_PROTO_STR(n) \
(((n) <= IPPROTO_SCTP && ip_proto_str[(n)]) ? ip_proto_str[(n)] : "?")
#endif
#include <resolv.h> /* For MAXNS below */
@ -69,6 +67,7 @@ struct fqdn {
};
#include <net/if.h>
#include <linux/un.h>
enum passt_modes {
MODE_PASST,
@ -79,6 +78,12 @@ enum passt_modes {
* struct ctx - Execution context
* @mode: Operation mode, qemu/UNIX domain socket or namespace/tap
* @pasta_pid: Target PID of namespace for pasta mode
* @debug: Enable debug mode
* @quiet: Don't print informational messages
* @foreground: Run in foreground, don't log to stderr by default
* @stderr: Force logging to stderr
* @sock_path: Path for UNIX domain socket
* @pcap: Path for packet capture file
* @epollfd: File descriptor for epoll instance
* @fd_tap_listen: File descriptor for listening AF_UNIX socket, if any
* @fd_tap: File descriptor for AF_UNIX socket or tuntap device
@ -93,18 +98,36 @@ enum passt_modes {
* @dns_search: DNS search list
* @v6: Enable IPv6 transport
* @addr6: IPv6 address for external, routable interface
* @addr6_ll: Link-local IPv6 address on 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
* @pasta_ifn: Name of namespace interface for pasta
* @no_tcp: Disable TCP operation
* @tcp: Context for TCP protocol handler
* @no_tcp: Disable UDP operation
* @udp: Context for UDP protocol handler
* @no_icmp: Disable ICMP operation
* @icmp: Context for ICMP protocol handler
* @mtu: MTU passed via DHCP/NDP
* @no_dns: Do not assign any DNS server via DHCP/DHCPv6/NDP
* @no_dns_search: Do not assign any DNS domain search via DHCP/DHCPv6/NDP
* @no_dhcp: Disable DHCP server
* @no_dhcpv6: Disable DHCPv6 server
* @no_ndp: Disable NDP handler altogether
* @no_ra: Disable router advertisements
*/
struct ctx {
enum passt_modes mode;
int pasta_pid;
int debug;
int quiet;
int foreground;
int stderr;
char sock_path[UNIX_PATH_MAX];
char pcap[PATH_MAX];
int epollfd;
int fd_tap_listen;
@ -123,16 +146,29 @@ struct ctx {
int v6;
struct in6_addr addr6;
struct in6_addr addr6_ll;
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];
char pasta_ifn[IF_NAMESIZE];
int no_tcp;
struct tcp_ctx tcp;
int no_udp;
struct udp_ctx udp;
int no_icmp;
struct icmp_ctx icmp;
int mtu;
int no_dns;
int no_dns_search;
int no_dhcp;
int no_dhcpv6;
int no_ndp;
int no_ra;
};
void proto_update_l2_buf(unsigned char *eth_d, unsigned char *eth_s,