84 lines
2.7 KiB
C
84 lines
2.7 KiB
C
/**
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* @file sk.h
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* @brief Implements protocol independent socket methods.
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* @note Copyright (C) 2012 Richard Cochran <richardcochran@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef HAVE_SK_H
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#define HAVE_SK_H
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#include "transport.h"
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/**
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* Obtain the numerical index from a network interface by name.
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* @param fd An open socket.
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* @param device The name of the network interface of interest.
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* @return The result from the SIOCGIFINDEX ioctl.
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*/
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int sk_interface_index(int fd, char *device);
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/**
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* Obtain the PHC device index of a network interface.
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* @param name The name of the interface
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* @return index The non-negative phc index associated with this iface.
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* On error a negative integer is returned.
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*/
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int sk_interface_phc(char *name, int *index);
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/**
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* Obtain the MAC address of a network interface.
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* @param name The name of the interface
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* @param mac Buffer to hold the result
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* @param len Length of 'mac'
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* @return Zero on success, non-zero otherwise.
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*/
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int sk_interface_macaddr(char *name, unsigned char *mac, int len);
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/**
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* Read a message from a socket.
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* @param fd An open socket.
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* @param buf Buffer to receive the message.
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* @param buflen Size of 'buf' in bytes.
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* @param hwts Pointer to a buffer to receive the message's time stamp.
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* @param flags Flags to pass to RECV(2).
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* @return
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*/
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int sk_receive(int fd, void *buf, int buflen,
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struct hw_timestamp *hwts, int flags);
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/**
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* Enable time stamping on a given network interface.
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* @param fd An open socket.
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* @param device The name of the network interface to configure.
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* @param type The requested flavor of time stamping.
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* @return Zero on success, non-zero otherwise.
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*/
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int sk_timestamping_init(int fd, char *device, enum timestamp_type type);
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/**
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* Limits the number of RECVMSG(2) calls when attempting to obtain a
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* transmit time stamp on an event message.
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*/
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extern int sk_tx_retries;
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/**
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* Request the hardware receive filter that is limited to layer 2 time
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* stamping.
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*/
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extern int sk_prefer_layer2;
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#endif
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