74 lines
2.4 KiB
C
74 lines
2.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (c) 2015 National Instruments
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*
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* (C) Copyright 2015
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* Joe Hershberger <joe.hershberger@ni.com>
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*/
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#ifndef __ETH_RAW_OS_H
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#define __ETH_RAW_OS_H
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#define IFNAMSIZ 16
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/**
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* struct eth_sandbox_raw_priv - raw socket session
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*
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* sd: socket descriptor - the open socket during a session
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* host_ifname: interface name on the host to use for sending our packets
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* host_ifindex: interface index number on the host
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* device: struct sockaddr_ll - the host interface packets move to/from
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* local: 1 or 0 to select the local interface ('lo') or not
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* local_bindsd: socket descriptor to prevent the kernel from sending
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* a message to the server claiming the port is
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* unreachable
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* local_bind_udp_port: The UDP port number that we bound to
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*/
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struct eth_sandbox_raw_priv {
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int sd;
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char host_ifname[IFNAMSIZ];
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unsigned int host_ifindex;
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void *device;
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int local;
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int local_bind_sd;
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unsigned short local_bind_udp_port;
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};
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/* A struct to mimic if_nameindex but that does not depend on Linux headers */
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struct sandbox_eth_raw_if_nameindex {
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unsigned int if_index; /* Index of interface (1, 2, ...) */
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char *if_name; /* Null-terminated name ("eth0", etc.) */
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};
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/* Enumerate host network interfaces */
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struct sandbox_eth_raw_if_nameindex *sandbox_eth_raw_if_nameindex(void);
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/* Free the data structure of enumerated network interfaces */
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void sandbox_eth_raw_if_freenameindex(struct sandbox_eth_raw_if_nameindex *ptr);
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/*
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* Check if the interface named "ifname" is a localhost interface or not.
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* ifname - the interface name on the host to check
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*
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* returns - 0 if real interface, 1 if local, negative if error
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*/
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int sandbox_eth_raw_os_is_local(const char *ifname);
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/*
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* Look up the name of the interface based on the ifindex populated in priv.
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*
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* Overwrite the host_ifname member in priv based on looking up host_ifindex
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*
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* returns - 0 if success, negative if error
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*/
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int sandbox_eth_raw_os_idx_to_name(struct eth_sandbox_raw_priv *priv);
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int sandbox_eth_raw_os_start(struct eth_sandbox_raw_priv *priv,
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unsigned char *ethmac);
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int sandbox_eth_raw_os_send(void *packet, int length,
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struct eth_sandbox_raw_priv *priv);
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int sandbox_eth_raw_os_recv(void *packet, int *length,
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const struct eth_sandbox_raw_priv *priv);
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void sandbox_eth_raw_os_stop(struct eth_sandbox_raw_priv *priv);
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#endif /* __ETH_RAW_OS_H */
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