diff options
Diffstat (limited to 'passt.h')
| -rw-r--r-- | passt.h | 68 |
1 files changed, 62 insertions, 6 deletions
@@ -15,27 +15,76 @@ struct tap_msg { size_t l4_len; }; -#define SOCK_BUF_BYTES (ETH_MAX_MTU * 4) +union epoll_ref; #include "icmp.h" #include "tcp.h" #include "udp.h" +/** + * union epoll_ref - Breakdown of reference for epoll socket bookkeeping + * @proto: IP protocol number + * @s: Socket number (implies 2^24 limit on number of descriptors) + * @tcp: TCP-specific reference part + * @udp: UDP-specific reference part + * @icmp: ICMP-specific reference part + * @data: Data handled by protocol handlers + * @u64: Opaque reference for epoll_ctl() and epoll_wait() + */ +union epoll_ref { + struct { + uint32_t proto:8, + s:24; + union { + union tcp_epoll_ref tcp; + union udp_epoll_ref udp; + union icmp_epoll_ref icmp; + uint32_t data; + }; + }; + uint64_t u64; +}; + +#define TAP_BUF_BYTES (ETH_MAX_MTU * 3) +#define TAP_BUF_FILL (TAP_BUF_BYTES - ETH_MAX_MTU - sizeof(uint32_t)) +#define TAP_MSGS (TAP_BUF_BYTES / sizeof(struct ethhdr) + 1) + +#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 */ +/** + * struct fqdn - Representation of fully-qualified domain name + * @n: Domain name string + */ struct fqdn { char n[NS_MAXDNAME]; }; #include <net/if.h> +enum passt_modes { + MODE_PASST, + MODE_PASTA, +}; + /** * struct ctx - Execution context - * @epollfd: file descriptor for epoll instance - * @fd_unix: AF_UNIX socket for tap file descriptor - * @v4: Enable IPv4 transport + * @mode: Operation mode, qemu/UNIX domain socket or namespace/tap + * @pasta_pid: Target PID of namespace for pasta mode + * @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 * @mac: Host MAC address * @mac_guest: Guest MAC address + * @v4: Enable IPv4 transport * @addr4: IPv4 address for external, routable interface * @addr4_seen: Latest IPv4 address seen as source from tap * @mask4: IPv4 netmask, network order @@ -49,10 +98,17 @@ struct fqdn { * @gw6: Default IPv6 gateway * @dns4: IPv4 DNS addresses, zero-terminated * @ifn: Name of routable interface + * @tcp: Context for TCP protocol handler + * @udp: Context for UDP protocol handler + * @icmp: Context for ICMP protocol handler */ struct ctx { + enum passt_modes mode; + int pasta_pid; + int epollfd; - int fd_unix; + int fd_tap_listen; + int fd_tap; unsigned char mac[ETH_ALEN]; unsigned char mac_guest[ETH_ALEN]; @@ -74,7 +130,7 @@ struct ctx { char ifn[IF_NAMESIZE]; - struct icmp_ctx icmp; struct tcp_ctx tcp; struct udp_ctx udp; + struct icmp_ctx icmp; }; |