From f7a55ad74c90928d86f1bbf56590d9571c1b828f Mon Sep 17 00:00:00 2001 From: Ole Troan Date: Tue, 16 May 2017 14:59:29 +0200 Subject: PUNT socket: External control plane processes connected via UNIX domain sockets. An external (to VPP) process can register (over the VPP binary API) to receive control plane packets over a UNIX domain socket. The packets are prepended with a packet descriptor containing meta-data (if_index of interface, etc). Currently only UDP is supported. The socket supports sending of packets/frames as well. The sent packet is prepended with a descriptor, telling VPP to route the packet (via ip4-lookup, ip6-lookup) or as an pre-formed Ethernet frame that is sent directly to interface-output. The intended use case for this is for an external DHCP client or a RIP implementation. New configuration option: punt { socket } To register use the punt_socket API message. TODO: - Add support for pre-routing. I.e send L3 packet to given TX interface, but do ARP/ND (ip[46]-rewrite) - Add test scripts - Support for abstract names (starting with \0) - Add rate limiting (COP) - Support for other protocols, e.g. IPv6 ND Change-Id: I4a0afc8020deebb3d9d74686dde694ee5bcb8d0f Signed-off-by: Ole Troan --- src/vnet/ip/punt.h | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 50 insertions(+), 2 deletions(-) (limited to 'src/vnet/ip/punt.h') diff --git a/src/vnet/ip/punt.h b/src/vnet/ip/punt.h index 09a9d4c55bf..0103249cca0 100644 --- a/src/vnet/ip/punt.h +++ b/src/vnet/ip/punt.h @@ -20,6 +20,7 @@ #ifndef included_punt_h #define included_punt_h +#include typedef enum { #define punt_error(n,s) PUNT_ERROR_##n, @@ -30,9 +31,56 @@ typedef enum clib_error_t *vnet_punt_add_del (vlib_main_t * vm, u8 ipv, - u8 protocol, u16 port, int is_add); + u8 protocol, u16 port, bool is_add); +clib_error_t *vnet_punt_socket_add (vlib_main_t * vm, u32 header_version, + bool is_ip4, u8 protocol, u16 port, + char *client_pathname); +clib_error_t *vnet_punt_socket_del (vlib_main_t * vm, bool is_ip4, + u8 l4_protocol, u16 port); +char *vnet_punt_get_server_pathname (void); -#endif /* included_punt_h */ +enum punt_action_e +{ + PUNT_L2 = 0, + PUNT_IP4_ROUTED, + PUNT_IP6_ROUTED, +}; + +/* + * Packet descriptor header. Version 1 + * If this header changes, the version must also change to notify clients. + */ +#define PUNT_PACKETDESC_VERSION 1 +typedef struct __attribute__ ((packed)) +{ + u32 sw_if_index; /* RX or TX interface */ + enum punt_action_e action; +} punt_packetdesc_t; + +/* + * Client registration + */ +typedef struct +{ + u16 port; + struct sockaddr_un caddr; +} punt_client_t; + +typedef struct +{ + int socket_fd; + char sun_path[sizeof (struct sockaddr_un)]; + punt_client_t *clients_by_dst_port4; + punt_client_t *clients_by_dst_port6; + u32 unix_file_index; + bool is_configured; + vlib_node_t *interface_output_node; + u32 *ready_fds; + u32 *rx_buffers; +} punt_main_t; +extern punt_main_t punt_main; + +#endif /* * fd.io coding-style-patch-verification: ON -- cgit 1.2.3-korg